FN Thomson Reuters Web of Science™
VR 1.0
PT J
AU Mather, JH
   McFarlane, SA
   Miller, MA
   Johnson, KL
AF Mather, James H.
   McFarlane, Sally A.
   Miller, Mark A.
   Johnson, Karen L.
TI Cloud properties and associated radiative heating rates in the tropical
   western Pacific
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID CIRRUS CLOUDS; TOGA COARE; NAURU-ISLAND; WATER-VAPOR; ACCURATE
   PARAMETERIZATION; ATMOSPHERIC RADIATION; MARITIME CONTINENT; DEEP
   CONVECTION; CLIMATE MODELS; DOPPLER RADAR
AB [1] Calculations of radiative flux profiles require measurements of thermodynamic and cloud properties ( temperature, humidity, liquid and ice water content). Instruments capable of making these measurements have only recently become available. The U. S. Department of Energy Atmospheric Radiation Measurement ( ARM) Program operates a comprehensive set of atmospheric remote sensing instruments at sites around the world, including three in the tropical western Pacific region. We have processed several months of ARM observations from two of these sites, Manus and Nauru, to calculate time series of vertical cloud property profiles and associated radiative fluxes and heating rates. Maxima in cloud occurrence are found in the boundary layer and the upper troposphere at both sites. Manus, which was much more convectively active than Nauru during the study period, also exhibits a midlevel cloud feature near the melting level. The two sites exhibit very different diurnal cycles. Manus experiences an afternoon maximum in high clouds while Nauru experiences a weak afternoon minimum. Nauru experiences a strong afternoon maximum in boundary layer clouds. Calculated fluxes at the surface and the top of the atmosphere are found to be in reasonable agreement with measurements. Below 15 km, radiative processes lead to cooling in the average profile, with local maxima near the surface and approximately 8 km. On average, high and midlevel clouds have a net warming effect though not enough to offset the clear-sky cooling. The prevalent boundary layer clouds at Nauru have a net cooling effect in and above the cloud layer and a net warming below. This data set will be an important tool for describing radiative processes in the tropics and assessing the simulation of these processes in dynamical models.
C1 Pacific NW Natl Lab, Richland, WA USA.
   Brookhaven Natl Lab, Upton, NY USA.
RP Mather, JH (reprint author), Pacific NW Natl Lab, Richland, WA USA.
EM jim.mather@pnl.gov
RI McFarlane, Sally/C-3944-2008
NR 67
TC 46
Z9 47
U1 0
U2 9
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD MAR 1
PY 2007
VL 112
IS D5
AR D05201
DI 10.1029/2006JD007555
PG 19
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 143GL
UT WOS:000244708000004
ER

PT J
AU Abel, MR
   Graham, S
   Serrano, JR
   Kearney, SP
   Phinney, LM
AF Abel, Mark R.
   Graham, Samuel
   Serrano, Justin R.
   Kearney, Sean P.
   Phinney, Leslie M.
TI Raman thermometry of polysilicon microelectromechanical systems in the
   presence of an evolving stress
SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
LA English
DT Article
DE Raman spectroscopy; MEMS; thermometry; thermal stresses
ID FORCE MICROSCOPE CANTILEVERS; ELECTROTHERMAL ACTUATORS; TEMPERATURE;
   SILICON; SPECTROSCOPY; SCATTERING; ARRAY
AB In this work, the use of Raman Stokes peak location and linewidth broadening methods were evaluated for thermometry applications of polysilicon microheaters subjected to evolving thermal stresses. Calibrations were performed using the temperature dependence of each spectral characteristic separately, and the uncertainty of each method quantified. It was determined that the Stokes linewidth was independent of stress variation allowing for temperature determination, irrespective of stress state. However the linewidth method is subject to greater uncertainty than the Stokes shift determination. The uncertainties for each method are observed to decrease with decreasing temperature and increasing integration times. The techniques were applied to mechanically constrained electrically active polysilicon microheaters. Results revealed temperatures in excess of 500 degrees C could be achieved in these devices. Using the peak location method resulted in an underprediction of temperature due to the development of a relative compressive thermal stress with increasing power dissipation.
C1 Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
   Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
RP Graham, S (reprint author), Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA.
EM sgraham@me.gatech.edu
NR 20
TC 18
Z9 18
U1 0
U2 5
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0022-1481
J9 J HEAT TRANS-T ASME
JI J. Heat Transf.-Trans. ASME
PD MAR
PY 2007
VL 129
IS 3
BP 329
EP 334
DI 10.1115/1.2409996
PG 6
WC Thermodynamics; Engineering, Mechanical
SC Thermodynamics; Engineering
GA 153TF
UT WOS:000245457400010
ER

PT J
AU Baughman, B
   Todd, BD
AF Baughman, Brooke
   Todd, Brian D.
TI Role of substrate cues in habitat selection by recently metamorphosed
   Bufo terrestris and Scaphiopus holbrookii
SO JOURNAL OF HERPETOLOGY
LA English
DT Article
ID EVAPORATIVE WATER-LOSS; AMPHIBIAN DECLINES; SALAMANDERS; FOREST;
   HERPETOFAUNA; ABUNDANCE; MOVEMENT; RATES; RISK; FROG
AB Amphibians exhibit high rates of evaporative water loss that can affect their distribution, movements, and patterns of habitat use. Forest clearcutting alters habitat and results in environmental changes such as canopy removal and leaf litter loss that may promote drier microclimates in harvested clearcuts. Subsequently, clearcutting has been shown to generally reduce amphibian abundances and richness. We investigated the role of substrate cues in habitat differentiation between clearcuts and forests in juvenile Southern Toads (Bufo terrestris) and Eastern Spadefoot Toads (Scaphiopus holbrookii) in laboratory experiments. Neither B. terrestris nor S. holbrookii exhibited a preference for a single substrate when offered the choice between forest soil and clearcut soil. However, S. holbrookii significantly preferred forest substrate over clearcut substrate when forest litter was added to the forest soil. The affinity for forest litter exhibited by juvenile S. holbrookii suggests that the availability of suitable microhabitats may be an important determinant of S. holbrookii distributions and may explain previously reported habitat associations in field studies.
C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
RP Todd, BD (reprint author), Univ Georgia, Savannah River Ecol Lab, Drawer E, Aiken, SC 29802 USA.
EM todd@srel.edu
NR 23
TC 6
Z9 6
U1 3
U2 16
PU SOC STUDY AMPHIBIANS REPTILES
PI ST LOUIS
PA C/O ROBERT D ALDRIDGE, ST LOUIS UNIV, DEPT BIOLOGY, 3507 LACLEDE, ST
   LOUIS, MO 63103 USA
SN 0022-1511
J9 J HERPETOL
JI J. Herpetol.
PD MAR
PY 2007
VL 41
IS 1
BP 154
EP 157
DI 10.1670/0022-1511(2007)41[154:ROSCIH]2.0.CO;2
PG 4
WC Zoology
SC Zoology
GA 151AW
UT WOS:000245261700020
ER

PT J
AU Fodor, Z
   Katz, SD
   Schmidt, C
AF Fodor, Zoltan
   Katz, Sandor D.
   Schmidt, Christian
TI The density of states method at non-zero chemical potential
SO JOURNAL OF HIGH ENERGY PHYSICS
LA English
DT Article
DE lattice quantum field theory; lattice QCD; lattice gauge field theories
ID LATTICE QCD; FINITE-TEMPERATURE; PARTITION-FUNCTION; PHASE-DIAGRAM;
   GAUGE-THEORY
AB We study the QCD phase diagram by first principle lattice calculations at so far unreached high densities. For this purpose we employ the density of states method. Unimproved staggered fermions, which describe four quark flavors in the continuum are used in this analysis. Though the method is quite expensive, small lattices show an indication for a triple-point connecting three different phases on the phase diagram.
C1 Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany.
   Eotvos Lorand Univ, Inst Theoret Phys, H-1117 Budapest, Hungary.
   Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Fodor, Z (reprint author), Univ Wuppertal, Dept Phys, Gauss 20, D-42119 Wuppertal, Germany.
EM fodor@theorie.physik.uni-wuppertal.de; katz@bodri.elte.hu;
   cschmidt@bnl.gov
RI Katz, Sandor/A-4154-2011
NR 39
TC 73
Z9 73
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1029-8479
J9 J HIGH ENERGY PHYS
JI J. High Energy Phys.
PD MAR
PY 2007
IS 3
AR 121
PG 15
WC Physics, Particles & Fields
SC Physics
GA 160DV
UT WOS:000245922000121
ER

PT J
AU Tan, ML
   Bizzarri, AR
   Xiao, YM
   Cannistraro, S
   Ichiye, T
   Manzoni, C
   Cerullo, G
   Adams, MWW
   Jenney, FE
   Cramer, SP
AF Tan, Ming-Liang
   Bizzarri, Anna Rita
   Xiao, Yuming
   Cannistraro, Salvatore
   Ichiye, Toshiko
   Manzoni, Cristian
   Cerullo, Giulio
   Adams, Michael W. W.
   Jenney, Francis E., Jr.
   Cramer, Stephen P.
TI Observation of terahertz vibrations in Pyrococcus furiosus rubredoxin
   via impulsive coherent vibrational spectroscopy and nuclear resonance
   vibrational spectroscopy - interpretation by molecular mechanics
SO JOURNAL OF INORGANIC BIOCHEMISTRY
LA English
DT Article
DE rubredoxin; Pyrococcus furiosus; normal mode; impulsive coherent
   vibrational spectroscopy
ID RAY ABSORPTION-SPECTROSCOPY; MAGNETIC CIRCULAR-DICHROISM;
   CHARGE-TRANSFER DYNAMICS; PUMP-PROBE SPECTROSCOPY; NEUTRON-SCATTERING;
   RAMAN-SPECTROSCOPY; CLOSTRIDIUM-PASTEURIANUM; PROTEINS; PLASTOCYANIN;
   EXCITATION
AB We have used impulsive coherent vibrational spectroscopy (ICVS) to study the Fe(S-CYS)(4) site in oxidized rubredoxin (Rd) from Pyrococcus furiosus (Pf). In this experiment, a 15 fs visible laser pulse is used to coherently pump the sample to an excited electronic state, and a second < 10 fs pulse is used to probe the change in transmission as a function of the time delay. PfRd was observed to relax to the ground state by a single exponential decay with time constants of similar to 255-275 fs. Superimposed on this relaxation are oscillations caused by coherent excitation of vibrational modes in both excited and ground electronic states. Fourier transformation reveals the frequencies of these modes.
   The strongest ICV mode with 570 nm excitation is the symmetric Fe-S stretching mode near 3 10 cm(-1), compared to 313 cm(-1) in the low temperature resonance Raman. If the rubredoxin is pumped at 520 nm, a set of strong bands occurs between 20 and 110 cm-1. Finally, there is a mode at similar to 500 cm(-1) which is similar to features near 508 cm(-1) in blue Cu proteins that have been attributed to excited state vibrations.
   Normal mode analysis using 488 protein atoms and 558 waters gave calculated spectra that are in good agreement with previous nuclear resonance vibrational spectra (NRVS) results. The lowest frequency normal modes are identified as collective motions of the entire protein or large segments of polypeptide. Motion in these modes may affect the polar environment of the redox site and thus tune the electron transfer functions in rubredoxins. (c) 2006 Elsevier Inc. All rights reserved.
C1 Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
   Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
   Univ Georgia, Dept Biochem & Mol Biol, Athens, GA 30602 USA.
   Georgetown Univ, Dept Chem, Washington, DC 20057 USA.
   Univ Tuscia, INFM, CNISM, Biophys & Nanosci Ctr, I-01100 Viterbo, Italy.
   Politecn Milan, Dipartimento Fis, CNR, INFM,Natl Lab Ultrafast & Ultraintense Opt Sci, I-20133 Milan, Italy.
RP Cannistraro, S (reprint author), Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA.
EM cannistr@unitus.it; spcramer@lbl.gov
RI Manzoni, Cristian/F-6669-2011; Cerullo, Giulio/F-6534-2011; cannistraro,
   salvatore/D-4598-2015; 
OI Manzoni, Cristian/0000-0002-4169-8869; cannistraro,
   salvatore/0000-0002-0228-7311; Cerullo, Giulio/0000-0002-9534-2702
FU NIBIB NIH HHS [EB-001962]; NIGMS NIH HHS [GM-45303, GM-60329, GM-65440]
NR 53
TC 5
Z9 5
U1 1
U2 9
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0162-0134
J9 J INORG BIOCHEM
JI J. Inorg. Biochem.
PD MAR
PY 2007
VL 101
IS 3
BP 375
EP 384
DI 10.1016/j.jinorgbio.2006.09.031
PG 10
WC Biochemistry & Molecular Biology; Chemistry, Inorganic & Nuclear
SC Biochemistry & Molecular Biology; Chemistry
GA 144CU
UT WOS:000244773800001
PM 17204331
ER

PT J
AU Nicklas, M
   Miclea, CF
   Sarrao, JL
   Thompson, JD
   Sparn, G
   Steglich, F
AF Nicklas, M.
   Miclea, C. F.
   Sarrao, J. L.
   Thompson, J. D.
   Sparn, G.
   Steglich, F.
TI Influence of antiferromagnetic fluctuations on the
   Fulde-Ferrell-Larkin-Ovchinnikov state in CeCoIn5
SO JOURNAL OF LOW TEMPERATURE PHYSICS
LA English
DT Article
DE FFLO state; heavy fermion; high pressure; superconductivity
ID UNCONVENTIONAL SUPERCONDUCTIVITY; CRITICAL FIELD; PRESSURE; DEPENDENCE;
   HEAT
AB The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state is a spatially inhomogeneous superconducting (SC) phase with a periodically modulated order parameter predicted to appear in sufficiently clean type-II superconductors, close to the upper critical field, if the orbital pair breaking is small relative to the Pauli-limiting effect. The heavy-fermion superconductor CeCoIn5 is the first material, where different physical probes show strong experimental evidence pointing to the realization of the FFLO state, even though strong antiferromagnetic (AFM) spin-fluctuations (SF) are present at atmospheric pressure. To study the influence of the AFM-SF on the FFLO state we performed heat-capacity experiments under pressure. We utilized a newly developed miniature piston-cylinder type pressure cell specially suited for measuring small samples at high-magnetic fields and low temperatures (0 GPa <= P <= 1.5 GPa, 0 kOe <= H <= 140 kOe, and 100 mK <= T <= 4 K). We found the second anomaly inside the SC state in CeCoIn5 can still be observed with pressure, which suppress the strong AFM-SF. The FFLO phase extends to higher fields and temperatures on applying pressure while the Pauli-limiting effect is becoming weaker and the SF are suppressed. This reveals the detrimental effect of the AFM-SF on the FFLO phase stability.
C1 Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Nicklas, M (reprint author), Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany.
EM nicklas@cpfs.mpg.de
RI Miclea, Corneliu Florin/C-5047-2011; Sparn, Guenter/F-5120-2013;
   Nicklas, Michael/B-6344-2008
OI Nicklas, Michael/0000-0001-6272-2162
NR 37
TC 2
Z9 2
U1 0
U2 2
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2291
J9 J LOW TEMP PHYS
JI J. Low Temp. Phys.
PD MAR
PY 2007
VL 146
IS 5-6
BP 669
EP 680
DI 10.1007/s10909-006-9284-7
PG 12
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 137RT
UT WOS:000244310400015
ER

PT J
AU Lima, AL
AF Lima, A. L.
TI Magnetocaloric properties of the pseudo-binary Er-rich lanthanide
   dialuminide compounds
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE magnetocaloric effect; intermetallic compounds
AB The compounds (RE1-xErx)Al-2 (where RE = Gd, Ho, Pr for x >= 0.75) were studied experimentally and theoretically in order to evaluate their magnetocaloric properties and suitability for use as working media in magnetic refrigeration devices operating at low temperatures. I propose a theoretical description of these systems which are composed of two rare-earth ions with different total angular momentum (J(RE)(1) and J(RE)(2)) Our model Hamiltonian is solved self-consistently, taking into account crystal electric fields, exchange interactions, the Zeeman effect and second-order effects. From the eigenvalues and eigenstates, the partition function from which thermodynamic quantities may be calculated is obtained, including the isothermal magnetic entropy change, Delta S-mag. In order to validate the theoretical results, Delta S(ma)g obtained from heat capacity measurements using Maxwell's relations is compared to the calculated one. The results indicate that for Er-rich compositions fairly good agreement between theoretical and experimental Delta S-mag is obtained. (c) 2006 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87454 USA.
RP Lima, AL (reprint author), Los Alamos Natl Lab, Natl High Magnet Field Lab, POB 1663, Los Alamos, NM 87454 USA.
EM limaana02@hotmail.com
NR 10
TC 4
Z9 4
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 1
BP 51
EP 56
DI 10.1016/j.jmmm.2006.07.028
PG 6
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 114ZB
UT WOS:000242703100009
ER

PT J
AU Christianson, AD
   Gardner, JS
   Kang, HJ
   Chung, JH
   Bobev, S
   Sarrao, JL
   Lawrence, JM
AF Christianson, A. D.
   Gardner, J. S.
   Kang, H. J.
   Chung, J.-H.
   Bobev, S.
   Sarrao, J. L.
   Lawrence, J. M.
TI Low temperature behavior of the heavy fermion Ce3Co4Sn13
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE heavy fermion; neutron diffraction; inelastic neutron scattering;
   quantum critical point
ID CE; LA
AB The compound Ce3Co4Sn13 is an extremely heavy cubic heavy fermion system with a low temperature electronic specific heat of order similar to 4J/mol K-2. If the compound is nonmagnetic, it would be one of the heaviest nonmagnetic Ce-based heavy fermions reported to date and therefore would be expected to lie extremely close to a quantum critical point. However, a broad peak of unknown origin is observed at 0.8K in the specific heat and magnetic susceptibility, suggesting the possibility of antiferromagnetic order. We present neutron diffraction data from polycrystalline samples which do not show any sign of magnetic scattering below 0.8 K. In addition, we present inelastic neutron scattering data from a single crystal sample which is consistent with the 1.2K energy scale for Kondo spin fluctuations determined from specific heat measurements. (c) 2006 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Univ Calif Irvine, Irvine, CA 92697 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   Indiana Univ, IUCF, Bloomington, IN 47405 USA.
   Univ Maryland, College Pk, MD 20742 USA.
   Univ Delaware, Newark, DE 19716 USA.
RP Christianson, AD (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM postfab@googlemail.com
RI Gardner, Jason/A-1532-2013; christianson, andrew/A-3277-2016
OI christianson, andrew/0000-0003-3369-5884
NR 8
TC 11
Z9 11
U1 3
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 266
EP 267
DI 10.1016/j.jmmm.2006.10.040
PN 1
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000026
ER

PT J
AU Ebihara, T
   Harrison, N
   Jaime, M
   Silhanek, A
   Tezuka, K
   Morishita, K
   Iwamoto, Y
   Terashima, T
AF Ebihara, T.
   Harrison, N.
   Jaime, M.
   Silhanek, A.
   Tezuka, K.
   Morishita, K.
   Iwamoto, Y.
   Terashima, T.
TI Physical properties at high magnetic fields in CeIn2.75Sn0.25
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE CeIn2.85Sn0.25; quantum critical point; magnetic field
AB High magnetic field induces quantum criticality in CeIn3 with suppressing the Neel temperature. Estimated quantum critical. efield of CeIn3 is about 60T where the Neel temperature is suppressed to reach absolute zero. The magnetic. field (60T) is too high to measure electrical resistivity or specific heat precisely. Sn doping to In site of CeIn3 reduces the Neel temperature. Reduction of Neel temperature indicates lower critical. field to facilitate investigation of electronic states at high magnetic. fields. Electrical resistivity and specific. c heat in CeIn2.Sn-85(0.25) were measured to map an H-T phase diagram. (c) 2006 Elsevier B. V. All rights reserved.
C1 Fac Sci, Dept Phys, Oya, Shizuoka 4228529, Japan.
   Los Alamos Natl Lab, Natl High Magnet Field Lab MS E 536, Los Alamos, NM 87545 USA.
RP Ebihara, T (reprint author), Fac Sci, Dept Phys, Oya, Shizuoka 4228529, Japan.
EM sptebih@ipc.shizuoka.ac.jp
RI Jaime, Marcelo/F-3791-2015; 
OI Jaime, Marcelo/0000-0001-5360-5220; Harrison, Neil/0000-0001-5456-7756
NR 3
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 298
EP 299
DI 10.1016/j.jmmm.2006.10.050
PN 1
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000037
ER

PT J
AU Iwamoto, Y
   Ebihara, T
   Harrison, N
   Jaime, M
   Silhanek, A
   Tezuka, K
   Morishita, K
   Terashima, T
   Iyo, A
AF Iwamoto, Y.
   Ebihara, T.
   Harrison, N.
   Jaime, M.
   Silhanek, A.
   Tezuka, K.
   Morishita, K.
   Terashima, T.
   Iyo, A.
TI Reduction of Neel temperature of CeIn3 by la doping
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE Ce1-xLaxIn3; x-T phase diagram
AB The Neel temperature of heavy fermion material CeIn3 is at 10 K. La doping to Ce site of CeIn3 introduces increase of distance between Ce ions and reduction of number of 4f electron. It is implied the reduction of 4f electron number with La doping weakens inter site magnetic interaction. An x-T phase diagram was drawn with Neel temperatures estimated from both electrical resistivity and magnetic susceptibility measurements. (c) 2006 Elsevier B.V. All rights reserved.
C1 Dept Phys, Shizuoka 4228529, Japan.
   Los Alamos Natl Lab, Natl High Magnet Field Lab MS E536, Los Alamos, NM 87545 USA.
   AIST Cent 2, Nanoelect Res Inst, Superconduct Mat Grp, Tsukuba, Ibaraki 3058568, Japan.
RP Ebihara, T (reprint author), Dept Phys, 836 Oya, Shizuoka 4228529, Japan.
EM sptebih@ipc.shizuoka.ac.jp
RI Jaime, Marcelo/F-3791-2015; 
OI Jaime, Marcelo/0000-0001-5360-5220; Harrison, Neil/0000-0001-5456-7756
NR 6
TC 4
Z9 4
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 300
EP 302
DI 10.1016/j.jmmm.2006.10.052
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000038
ER

PT J
AU Tokiwa, Y
   Ronning, F
   Fritsch, V
   Movshovich, R
   Thompson, JD
   Sarrao, JL
AF Tokiwa, Y.
   Ronning, F.
   Fritsch, V.
   Movshovich, R.
   Thompson, J. D.
   Sarrao, J. L.
TI Low-temperature specific heat of YbIn1-xCux
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE non-fermi liquid; ferromagnetic fluctuations; specific heat
ID VALENCE PHASE-TRANSITION; PRESSURE; YBXIN1-XCU2; YBINCU4
AB We investigated geometrically frustrated YbIn1-xRhxCu4 in order to search for quantum criticality associated with ferromagnetic correlations. We report low-temperature specific heat down to 50mK of YbIn1-x xRhxCu(4) with x = 0.5 and 0.7. For both x = 0.5 and 0.7 C/T(T) increases rapidly with decreasing temperature, and displays a broad maximum at about T = 0.25 K, reaching values of up to similar to 5J/molK(2). (c) 2006 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Karlsruhe, Inst Phys, D-76128 Karlsruhe, Germany.
RP Tokiwa, Y (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM ytokiwa@lanl.gov
RI Tokiwa, Yoshifumi/P-6593-2015; Fritsch, Veronika/P-1352-2016
OI Tokiwa, Yoshifumi/0000-0002-6294-7879; Fritsch,
   Veronika/0000-0002-6620-4554
NR 10
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 325
EP 327
DI 10.1016/j.jmmm.2006.10.022
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000047
ER

PT J
AU Mito, T
   Nakamura, M
   Otani, M
   Wada, S
   Koyama, T
   Ishizuka, M
   Sarrao, JL
AF Mito, Takeshi
   Nakamura, Masanori
   Otani, Manabu
   Wada, Shinji
   Koyama, Takehide
   Ishizuka, Mamoru
   Sarrao, John L.
TI Pressure induced magnetic ordering in YbInCu4
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE high pressure; pressure; induced magnetic order; valence transition; Yb
   compound
ID VALENCE PHASE-TRANSITION; YBXIN1-XCU2
AB In order to investigate pressure-induced magnetically ordered phase in YbInCu4, the DC magnetization has been measured up to 7.57 GPa by using the combined system of a diamond-anvil pressure cell and a superconducting quantum interference device (SQUID) with a vibrating coil magnetometer. In the pressure range above 3.05 GPa, a rapid increase in the magnetization below T-M = 2.5 K was observed, giving the first direct evidence of spontaneous magnetization in the high pressure phase of YbInCu4. T-M shows weak pressure dependence up to the maximum pressure of 7.57 GPa. A phase diagram for YbInCu4 over a wide range of pressure is presented. (c) 2006 Elsevier B.V. All rights reserved.
C1 Kobe Univ, Fac Sci, Dept Phys, Kobe, Hyogo 6578501, Japan.
   Osaka Univ, Cent Workshop KOUSAKU, Toyonaka, Osaka 5600043, Japan.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Mito, T (reprint author), Kobe Univ, Fac Sci, Dept Phys, Kobe, Hyogo 6578501, Japan.
EM mito@kobe-u.ac.jp
NR 8
TC 1
Z9 1
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 352
EP 353
DI 10.1016/j.jmmm.2006.10.066
PN 1
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000056
ER

PT J
AU Molodtsov, SL
   Danzenbacher, S
   Kucherenko, Y
   Laubschat, C
   Vyalikh, DV
   Hossain, Z
   Geibel, C
   Zhou, XJ
   Yang, WL
   Mannella, N
   Hussain, Z
   Shen, ZX
   Shi, M
   Patthey, L
AF Molodtsov, S. L.
   Danzenbaecher, S.
   Kucherenko, Yu
   Laubschat, C.
   Vyalikh, D. V.
   Hossain, Z.
   Geibel, C.
   Zhou, X. J.
   Yang, W. L.
   Mannella, N.
   Hussain, Z.
   Shen, Z-X
   Shi, M.
   Patthey, L.
TI Hybridization of 4f states in heavy-fermion compounds YbRh2Si2 and
   YbIr2Si2
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE Kondo behavior; heavy fermion; photoemission; Anderson model
ID PHOTOEMISSION; MODEL
AB The heavy-fermion compounds YbRh2Si2 and YbIr2Si2 were studied by means of angle-resolved photoemission. The observed dispersion and splittings of the 4f(13) bulk and surface emissions are explained in terms of a simplified periodic Anderson model by a k dependence of the electron hopping matrix element between the 4f and valence-band states. (c) 2006 Elsevier B.V. All rights reserved.
C1 Tech Univ Dresden, Inst Festkorperphys, D-01062 Dresden, Germany.
   St Petersburg State Univ, Inst Phys, St Petersburg 198504, Russia.
   Natl Acad Sci Ukraine, Inst Met Phys, UA-03142 Kiev, Ukraine.
   Max Planck Inst Chem Phys Stoffe, D-01187 Dresden, Germany.
   Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India.
   Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
   Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
   Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
RP Molodtsov, SL (reprint author), Tech Univ Dresden, Inst Festkorperphys, D-01062 Dresden, Germany.
EM molodtso@physik.phy.tu-dresden.de
RI Vyalikh, Denis/H-8044-2013; Yang, Wanli/D-7183-2011
OI Vyalikh, Denis/0000-0001-9053-7511; Yang, Wanli/0000-0003-0666-8063
NR 8
TC 2
Z9 2
U1 3
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 443
EP 445
DI 10.1016/j.jmmm.2006.10.501
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000088
ER

PT J
AU Bauer, ED
   Thompson, JD
   Sarrao, JL
   Hundley, MF
AF Bauer, E. D.
   Thompson, J. D.
   Sarrao, J. L.
   Hundley, M. F.
TI Ferromagnetism and crystalline electric field effects in cubic UX2Zn20
   (X = Co, Rh, Ir)
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE heavy fermion; itinerant ferromagnet; crystalline electric field effects
ID SUPERCONDUCTIVITY
AB The physical properties of a new family of cubic UX2Zn20 (X = Co, Rh, Ir) heavy-fermion compounds are presented. Both UCo2Zn20 and URh2Zn20 show peaks in specific heat and magnetic susceptibility at similar to 5-10K suggesting the presence of crystalline electric field (CEF) effects in these materials, i.e., a localized 5f(2) configuration of uranium. UIr2Zn20 exhibits a first-order ferromagnetic transition at T-c = 2:1K with a saturation moment mu(sat) = 0.4 mu(B) at 2K indicating itinerant ferromagnetism. All compounds in this series are heavy-fermion materials with enhanced electronic specific heat coefficients gamma similar to 100-450 mJ/mol K-2. (c) 2006 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bauer, ED (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM edbauer@lanl.gov
RI Bauer, Eric/D-7212-2011; 
OI Bauer, Eric/0000-0003-0017-1937
NR 6
TC 13
Z9 13
U1 1
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 449
EP 451
DI 10.1016/j.jmmm.2006.10.505
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000090
ER

PT J
AU Thompson, JD
   Park, T
   Curro, NJ
   Ronning, F
   Movshovich, R
   Bauer, ED
   Sarrao, JL
AF Thompson, J. D.
   Park, Tuson
   Curro, N. J.
   Ronning, F.
   Movshovich, R.
   Bauer, E. D.
   Sarrao, J. L.
TI Magnetism and unconventional superconductivity in isostructural cerium
   and plutonium compounds
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE superconducting mechanisms; CeRhIn5; PuCoGa5; pressure; heavy fermion;
   NQR
ID ANISOTROPIC SPIN FLUCTUATIONS; CERHIN5; PRESSURE; NQR
AB The heavy-fermion antiferromagnet CeRhIn5 exhibits a complex interplay between magnetism and unconventional superconductivity (SC) as a function of applied pressure and magnetic field. This interplay leads to a line of magnetic quantum-critical points within the superconducting state. A comparison of nuclear spin-relaxation measurements on CeRhIn5 to those made on CeCoIn5, PuCoGa5, and PuRhGa5 suggests that SC and magnetism also may be related closely in these isostructural superconductors. (c) 2006 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Thompson, JD (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM jdt@lanl.gov
RI Bauer, Eric/D-7212-2011; Park, Tuson/A-1520-2012; Curro,
   Nicholas/D-3413-2009; 
OI Curro, Nicholas/0000-0001-7829-0237; Ronning, Filip/0000-0002-2679-7957;
   Bauer, Eric/0000-0003-0017-1937
NR 27
TC 6
Z9 6
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 532
EP 535
DI 10.1016/j.jmmm.2006.10.138
PN 1
PG 4
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000114
ER

PT J
AU Ohishi, K
   Heffner, RH
   Morris, GD
   Fluss, MJ
   Bauer, ED
   Morales, LA
   Sarrao, JL
   MacLaughlin, DE
   Shu, L
   Ito, TU
   Higemoto, W
AF Ohishi, K.
   Heffner, R. H.
   Morris, G. D.
   Fluss, M. J.
   Bauer, E. D.
   Morales, L. A.
   Sarrao, J. L.
   MacLaughlin, D. E.
   Shu, L.
   Ito, T. U.
   Higemoto, W.
TI Magnetic penetration depth and self-induced irradiation effects in
   superconducting PuCoGa5 probed by muon spin rotation
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE plutonium; superconductivity; f-electron; muon spin rotation
ID ORDER-PARAMETER; SCATTERING; SR
AB Freshly prepared samples of PuCoGa5 have the highest superconducting critical temperature T-c congruent to 19 K of all f-electron superconductors. In addition, this material undergoes self-irradiation from the radioactive decay of the Pu nuclei. We report muon spin rotation (mu SR) measurements of the superconducting penetration depth l in 400 day-old single crystalline samples of PuCoGa5 (T-c congruent to 15.5 K), and compare these results to mu SR measurements taken on the same samples after only 25 days of aging (T-c congruent to 18.5 K), in order to elucidate the symmetry of the order parameter and its dependence on aging. The experiments show that the low-temperature super fluid density n(s) decreases linearly with increasing T in both fresh and aged PuCoGa5, consistent with a line of nodes in the order parameter. (c) 2006 Elsevier B.V. All rights reserved.
C1 Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   TRIUMF, Vancouver, BC V6T 2A3, Canada.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA.
   Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 152, Japan.
RP Ohishi, K (reprint author), Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan.
EM ohishi.kazuki@jaea.go.jp
RI Ohishi, Kazuki/E-9592-2010; Bauer, Eric/D-7212-2011; Shu,
   Lei/E-7524-2012; 
OI Ohishi, Kazuki/0000-0003-1494-6502; Ito, Takashi/0000-0003-1971-4313;
   Bauer, Eric/0000-0003-0017-1937
NR 14
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 566
EP 568
DI 10.1016/j.jmmm.2006.10.152
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000123
ER

PT J
AU Kawasaki, S
   Sada, T
   Miyoshi, T
   Kotegawa, H
   Mukuda, H
   Kitaoka, Y
   Kobayashi, TC
   Fukuhara, T
   Maezawa, K
   Itoh, KM
   Haller, EE
AF Kawasaki, S.
   Sada, T.
   Miyoshi, T.
   Kotegawa, H.
   Mukuda, H.
   Kitaoka, Y.
   Kobayashi, T. C.
   Fukuhara, T.
   Maezawa, K.
   Itoh, K. M.
   Haller, E. E.
TI Ge-73-NQR study of heavy-fermion compound CeNi2Ge2
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE heavy fermion; CeNi2Ge2; NQR
ID SUPERCONDUCTIVITY; BEHAVIOR
AB We report 73 Ge-nuclear-quadrupole resonance (NQR) study of heavy-fermion compound CeNi2Ge2. The temperature dependence of the 73 Ge nuclear-spin-lattice-relaxation rate 1/T-1 indicates the development of magnetic correlations and the formation of a Fermi-liquid state at temperatures lower than T-FL 0.4K, where 1/T1T is constant. The 1/T1T decrease below T(NQR)c 0.1K, whereas resistance decreases below T (onset)c = 0.2K and does not become zero. These results indicate CeNi2Ge2 closely locates to a superconducting quantum critical point. (c) 2006 Elsevier B. V. All rights reserved.
C1 Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Toyonaka, Osaka 5608531, Japan.
   Okayama Univ, Fac Sci, Dept Phys, Okayama 7008530, Japan.
   Toyama Prefectural Univ, Fac Engn, Toyama 39303, Japan.
   Keio Univ, Dept Appl Phys & Phys Informat, Yokohama, Kanagawa 2238522, Japan.
   Univ Calif Berkeley, Dept Mat Sci & Engn, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Kawasaki, S (reprint author), Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Toyonaka, Osaka 5608531, Japan.
EM kawasaki@science.okayama-u.ac.jp
RI KOBAYASHI, Tatsuo/B-1527-2011; KAWASAKI, Shinji/B-2586-2011; Itoh,
   Kohei/C-5738-2014
NR 6
TC 1
Z9 1
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 590
EP 592
DI 10.1016/j.jmmm.2006.10.232
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000131
ER

PT J
AU Curnoe, SH
   Abu Alrub, TR
   Sergienko, IA
   Vekhter, I
AF Curnoe, S. H.
   Abu Alrub, T. R.
   Sergienko, I. A.
   Vekhter, I.
TI Superconducting gap nodes in PrOs4Sb12
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE unconventional superconductivity; skutterudite; gap nodes
AB We examine the superconducting gap nodes in crystals with tetrahedral (T-h) symmetry. The (0, 0, 1) phase of the three-dimensional order parameter in the triplet channel has nodes in the [001] directions. Following a second order phase transition to the state (0; i vertical bar eta(2)vertical bar, vertical bar eta 1 vertical bar), each node lifts away from the Fermi surface and splits into two deep dips. We discuss this scenario in the context of multiple superconducting phases in PrOs4Sb12. (c) 2006 Elsevier B. V. All rights reserved.
C1 Mem Univ Newfoundland, Dept Phys & Phys Oceanog, St John, NF, Canada.
   Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
RP Curnoe, SH (reprint author), Mem Univ Newfoundland, Dept Phys & Phys Oceanog, St John, NF, Canada.
EM curnoe@physics.mun.ca
RI Vekhter, Ilya/M-1780-2013; Abu Alrub, Tayseer /G-3213-2016
OI Abu Alrub, Tayseer /0000-0002-4849-6741
NR 16
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 605
EP 607
DI 10.1016/j.jmmm.2006.10.250
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000136
ER

PT J
AU Harada, A
   Kawasaki, S
   Mukuda, H
   Kitaoka, Y
   Thamizhavel, A
   Okuda, Y
   Settai, R
   Onuki, Y
   Itoh, KM
   Haller, EE
   Harima, H
AF Harada, A.
   Kawasaki, S.
   Mukuda, H.
   Kitaoka, Y.
   Thamizhavel, A.
   Okuda, Y.
   Settai, R.
   Onuki, Y.
   Itoh, K. M.
   Haller, E. E.
   Harima, H.
TI Pressure-induced antiferromagnetic superconductivity in CeNiGe3: A
   73Ge-NQR study under pressure
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE CeNiGe3; superconductivity; antiferromagnetism; heavy fermion; NQR under
   pressure
AB We report on antiferromagnetic (AF) properties of pressure-induced superconductivity in CeNiGe3 via the Ge-73 nuclear-quadrupole-resonance (NQR) measurements under pressure (P). The NQR-spectrum measurements have revealed that the incommensurate antiferromagnetic ordering is robust against increasing P with the increase of ordered moment and ordering temperature. Nevertheless the measurements of nuclear spin-lattice relaxation rate (1/T-1) have pointed to the onset of superconductivity as a consequence of Ce-4f electrons delocalized by applying P. The emergence of superconductivity under the development of AF order suggests that a novel type of superconducting mechanism works in this compound. (c) 2006 Elsevier B. V. All rights reserved.
C1 Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Osaka 5608531, Japan.
   Osaka Univ, Grad Sch Sci, Dept Phys, Osaka 5600043, Japan.
   Keio Univ, Dept Appl Phys & Phys Informat, Yokohama, Kanagawa 2238522, Japan.
   Univ Calif Berkeley, Dept Mat Sci & Engn, Lawrence Berkeley Nalt Lab, Berkeley, CA 94720 USA.
   Kobe Univ, Fac Sci, Dept Phys, Kobe, Hyogo 6578501, Japan.
RP Harada, A (reprint author), Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Osaka 5608531, Japan.
EM aharada@nmr.mp.es.osaka-u.ac.jp
RI Thamizhavel, Arumugam/A-1801-2011; KAWASAKI, Shinji/B-2586-2011; Itoh,
   Kohei/C-5738-2014
OI Thamizhavel, Arumugam/0000-0003-1679-4370; 
NR 8
TC 6
Z9 6
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 614
EP 616
DI 10.1016/j.jmmm.2006.10.883
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000139
ER

PT J
AU Bang, Y
   Graf, MJ
   Curro, NJ
   Balatsky, AV
AF Bang, Yunkyu
   Graf, M. J.
   Curro, N. J.
   Balatsky, A. V.
TI The nuclear spin-lattice relaxation rate in the PuMGa5 materials
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE pseudogap; heavy fermion; NMR
ID SUPERCONDUCTIVITY
AB We examine the nuclear spin-lattice relaxation rates 1/T-1 of PuRhGa5 and PuCoGa5, in particular, in normal state. PuRhGa5 exhibits a gradual suppression of (T1T)(-1) below 25K far above T-c similar to 8.5K, while measurements for PuCoGa5 reveal a monotonic increase down to T-c. We propose that this behavior is consistently understood by the crossover from the two-dimensional quantum antiferromagnetic regime of the local 5f-electron spins of Pu to the concomitant formation of the fermion pseudogap based on the two-component spin-fermion model. (c) 2006 Elsevier B.V. All rights reserved.
C1 Asia Pacific Ctr Theoret Phys, Pohang 790784, South Korea.
   Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Bang, Y (reprint author), Asia Pacific Ctr Theoret Phys, Pohang 790784, South Korea.
EM ykbang@jnu.ac.kr
RI Curro, Nicholas/D-3413-2009
OI Curro, Nicholas/0000-0001-7829-0237
NR 8
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 634
EP 636
DI 10.1016/j.jmmm.2006.10.277
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000146
ER

PT J
AU Park, T
   Sarrao, JL
   Thompson, JD
AF Park, Tuson
   Sarrao, J. L.
   Thompson, J. D.
TI Upper critical field (H-c2) scaling near a quantum critical point in the
   heavy-fermion compound CeRhIn5
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE CeRhIn5; phase diagram; quantum criticality; upper critical field;
   pressure-induced superconductivity
ID PHASE
AB We have measured the specific heat of CeRhIn5 at extreme conditions of low temperatures (T), high pressures (P), and high magnetic fields (H perpendicular to c-axis). Discrete forms of the upper critical field H-c2 scaling are observed below and above the critical pressure P-c1(= 1. 75) GPa. For P < 1.75 GPa, where unconventional superconductivity and magnetism coexist, H-c2 linearly increases with decreasing temperature. For P > 2. 35 GPa, where only unconventional superconductivity is observed up to the normal state, H-c2 shows normal behavior, saturating at low temperatures. In the intermediate pressure, 1. 75GPa < P < 2. 35 GPa, where applied magnetic field induces magnetism in the mixed superconducting state, H-c2 shows a crossover from normal temperature dependence to the unusual linear T dependence. These observations delineate the interplay between superconductivity and antiferromagnetic fluctuations that exist in the vicinity of the quantum critical point. (c) 2006 Elsevier B. V. All rights reserved.
C1 Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
RP Park, T (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM tuson@lanl.gov
RI Park, Tuson/A-1520-2012
NR 7
TC 4
Z9 4
U1 2
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
EI 1873-4766
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 712
EP 714
DI 10.1016/j.jmmm.2006.10.276
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000173
ER

PT J
AU Oh, YS
   Kim, KH
   Harrison, N
   Amitsuka, H
   Mydosh, JA
AF Oh, Yoon Seok
   Kim, Kee Hoon
   Harrison, N.
   Amitsuka, H.
   Mydosh, J. A.
TI Decrease of the coherence temperature with low Rh doping in
   U(Ru1-xRhx)(2)Si-2
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE heavy-fermion system; coherence temperature; URu2Si2
AB Comparative study of U(Ru1-xRhx)(2)Si-2 (x = 0 and 4%) through resistivity, magnetic susceptibility, and Hall coefficient measurements reveals that the coherence temperature, T-coh, of the Rh 4% doped sample clearly decreases by about 10-20% as compared with that of undoped one located around 50 K. Furthermore, T*, a characteristic temperature below which the resistivity shows the T-2 dependence, is also found to decrease by almost the same factor. These findings suggest that the low Rh doping sensitively destroys the itinerant band gap due to the hidden order (HO) through the reduction of the Fermi surface volume in the quasi-particle band. (c) 2006 Elsevier B.V. All rights reserved.
C1 Seoul Natl Univ, Sch Phys & Astron, SCSMR & FPRD, Seoul 151747, South Korea.
   Los Alamos Natl Lab, NHMFL, MS E536, Los Alamos, NM 87545 USA.
   Hokkaido Univ, Grad Sch Sci, Sapporo, Hokkaido 0600810, Japan.
   Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany.
RP Kim, KH (reprint author), Seoul Natl Univ, Sch Phys & Astron, SCSMR & FPRD, Seoul 151747, South Korea.
EM khkim@phya.snu.ac.kr
RI Oh, Yoon Seok/A-1071-2011; Amitsuka, Hiroshi/K-8539-2012; 
OI Oh, Yoon Seok/0000-0001-8233-1898; Harrison, Neil/0000-0001-5456-7756
NR 6
TC 3
Z9 3
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 855
EP 857
DI 10.1016/j.jmmm.2006.10.1018
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000219
ER

PT J
AU Kikugawa, N
   Rost, A
   Baumberger, F
   Ingle, NJC
   Hossain, MA
   Meevasana, W
   Shen, KM
   Lu, DH
   Damascelli, A
   Mackenzie, AP
   Hussain, Z
   Shen, ZX
AF Kikugawa, N.
   Rost, A.
   Baumberger, F.
   Ingle, N. J. C.
   Hossain, M. A.
   Meevasana, W.
   Shen, K. M.
   Lu, D. H.
   Damascelli, A.
   Mackenzie, A. P.
   Hussain, Z.
   Shen, Z. X.
TI Ca3Ru2O7: Electronic instability and extremely strong quasiparticle
   renormalisation
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE Ca3Ru2O7; electronic structure; transport properties; ARPES; crystal
   growth
ID TRANSPORT-PROPERTIES; SUPERCONDUCTIVITY; CRYSTAL; PHASE
AB We report on the electronic structure of the bilayer ruthenate Ca3Ru2O7 using high quality single-crystals grown by a floating-zone method which have the lowest residual resistivity so far achieved. The quantum oscillation, specific heat, and angle-resolved photoemission-spectroscopy (ARPES) measurements performed on these crystals establish that Ca3Ru2O7 is a quasi two-dimensional low-carrier metal with a density-wave instability. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland.
   Stanford Univ, Dept Phys & Appl Phys, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
   Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Rost, A (reprint author), Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan.
EM ar35@st-andrews.ac.uk
RI Baumberger, Felix/A-5170-2008; Shen, Kyle/B-3693-2008; Rost,
   Andreas/B-8379-2008; Rost, Andreas/F-3004-2011; Hossain,
   Muhammed/G-3876-2012; damascelli, andrea/P-6329-2014; Mackenzie,
   Andrew/K-6742-2015
OI Baumberger, Felix/0000-0001-7104-7541; Hossain,
   Muhammed/0000-0003-1440-3161; damascelli, andrea/0000-0001-9895-2226; 
NR 16
TC 2
Z9 2
U1 2
U2 14
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1027
EP 1029
DI 10.1016/j.jmmm.2006.10.225
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700161
ER

PT J
AU dela Cruz, CR
   Lorenz, B
   Gospodinov, MM
   Chu, CW
AF dela Cruz, C. R.
   Lorenz, B.
   Gospodinov, M. M.
   Chu, C. W.
TI Restoration of ferroelectricity by pressure in multiferroic HoMn2O5
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE multiferroic manganites; ferroelectricity; magnetic order;
   magneto-elastic coupling; magneto-electric coupling
AB The multiferroic properties of HoMn2O5 have been extensively studied to gain understanding of the magneto-dielectric coupling in this compound. In this work, dielectric measurements as well as polarization measurements in isotropic pressure up to 18 kbar are presented. The results indicate that the pressure is able to induce the ferroelectric order at low temperature in multiferroic HoMn2O5 implying the stabilization of the commensurate magnetic structure. The observation reveals that the ferroelectricity and magneto-elastic properties are highly correlated in this system. (c) D 2006 Elsevier B.V. All rights reserved.
C1 Univ Houston, Dept Phys, TcSUH, Houston, TX 77204 USA.
   Bulgarian Acad Sci, Inst Solid State Phys, BU-1784 Sofia, Bulgaria.
   Lawrence Berkeley Nalt Lab, Berkeley, CA 94720 USA.
   Hong Kong Univ Sci & Technol, Hong Kong, Peoples R China.
RP dela Cruz, CR (reprint author), Univ Houston, Dept Phys, TcSUH, Houston, TX 77204 USA.
EM crdelacruz@uh.edu
RI dela Cruz, Clarina/C-2747-2013
OI dela Cruz, Clarina/0000-0003-4233-2145
NR 6
TC 4
Z9 4
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1185
EP 1186
DI 10.1016/j.jmmm.2006.10.294
PN 2
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700216
ER

PT J
AU Kajiyoshi, K
   Kambe, T
   Mino, M
   Nojiri, H
   Kogerler, P
   Luban, M
AF Kajiyoshi, K.
   Kambe, T.
   Mino, M.
   Nojiri, H.
   Koegerler, P.
   Luban, M.
TI Direct estimation of zero-field energy gap in the nano-scale single
   molecular magnet V-15
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE single molecular magnet (SMM); quantum tunneling; Dzyaloshinskii-Moriya
   interaction (DMI); V-15; electron spin resonance (ESR)
AB The electron spin resonance (ESR) at low frequency (0.6-3 GHz) and at low temperature (-0.5 K) was performed for the single molecular magnet V-15. Non-linear field dependence of resonance at the lowest temperature implies the existence of the zero-field gap. The angle dependence of resonance field has strong anisotropy. We directly estimate the zero-field energy gap of 30 mK and analyze the energy levels using the model with Dzyaloshinskii-Moriya interaction. (c) 2006 Elsevier B.V. All rights reserved.
C1 Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan.
   Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
   Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
RP Kajiyoshi, K (reprint author), Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan.
EM kajiyosi@science.okayama-u.ac.jp
RI Nojiri, Hiroyuki/B-3688-2011; KAMBE, Takashi/B-2117-2011; Kogerler,
   Paul/H-5866-2013
OI Kogerler, Paul/0000-0001-7831-3953
NR 6
TC 16
Z9 16
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1203
EP 1205
DI 10.1016/j.jmmm.2006.10.313
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700221
ER

PT J
AU Zvyagin, SA
   Wosnitza, J
   Krzystek, J
   Stern, R
   Jaime, M
   Sasago, Y
   Uchinokura, K
AF Zvyagin, S. A.
   Wosnitza, J.
   Krzystek, J.
   Stern, R.
   Jaime, M.
   Sasago, Y.
   Uchinokura, K.
TI Spin-triplet excitons and anisotropy effects in the S=1/2 gapped
   antiferromagnet BaCuSi2O6
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE gapped antiferromagnet; EPR; dimer; excitons
ID RESONANCE
AB BaCuSi2O6 can be regarded as an almost ideal realization of an S = (1)/(2) system of weakly interacting spin dimers with spin-singlet ground state and gapped excitation spectrum. We argue that the fine structure observed in low-temperature EPR spectra of BaCuSi2O6 is a fingerprint of triplet excitations (excitons). Analyzing the angular dependence of the exciton modes allows us to precisely calculate the zero-field splitting within the triplet states and, correspondingly, the anisotropy parameter, D = 0.07 cm(-1). The proposed procedure can be applied for studying anisotropy effects in a large number of S = (1)/(2) gapped quantum antiferromagnets with dimerized or alternating spin structure. (c) 2006 Elsevier B.V. All rights reserved.
C1 Forschungszentrum Rossendorf, High Field Magnet Lab, D-01314 Dresden, Germany.
   Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
   NICPB, EE-12618 Tallinn, Estonia.
   Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
   Hitachi Ltd, Cent Res Lab, Tokyo 1858601, Japan.
   RIKEN, Wako, Saitama 35101, Japan.
RP Zvyagin, SA (reprint author), Forschungszentrum Rossendorf, High Field Magnet Lab, D-01314 Dresden, Germany.
EM s.zvyagin@fz-rossendorf.de
RI Zvyagin, Sergei/H-8389-2014; Jaime, Marcelo/F-3791-2015; Stern,
   Raivo/A-5387-2008
OI Jaime, Marcelo/0000-0001-5360-5220; Stern, Raivo/0000-0002-6724-9834
NR 8
TC 1
Z9 1
U1 1
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1206
EP 1208
DI 10.1016/j.jmmm.2006.10.323
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700222
ER

PT J
AU Notbohm, S
   Tennant, DA
   Lake, B
   Canfield, PC
   Fielden, J
   Kogerler, P
   Mikeska, HJ
   Luckmann, C
   Telling, MTF
AF Notbohm, S.
   Tennant, D. A.
   Lake, B.
   Canfield, P. C.
   Fielden, J.
   Koegerler, P.
   Mikeska, H. J.
   Luckmann, C.
   Telling, M. T. F.
TI Temperature effects on multi-particle scattering in a gapped quantum
   magnet
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE quantum magnet; dynamics; neutron scattering
ID CHAIN
AB We report measurements of the temperature effects on the dimerized antiferromagnetic chain material, copper nitrate Cu(NO3)(2) (.) 2.5D(2)O. Using inelastic neutron scattering we have measured the temperature dependence of the one- and two-magnon excitation spectra as well as the temperature induced one-magnon intra-band scattering in a single crystal. Comparison is made with numerical evaluations of thermal averages based on the calculation for a chain of 16 spins. (c) 2006 Elsevier B.V. All rights reserved.
C1 Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany.
   Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland.
   Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany.
   Iowa State Univ, Dept Phys & Astron, Ames Lab, Ames, IA 50011 USA.
   Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany.
   Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
RP Notbohm, S (reprint author), Hahn Meitner Inst Berlin GmbH, Glienicker Str 100, D-14109 Berlin, Germany.
EM susanne.notbohm@hmi.de
RI Canfield, Paul/H-2698-2014; Kogerler, Paul/H-5866-2013; Tennant,
   David/Q-2497-2015; Telling, Mark/F-3294-2014; 
OI Kogerler, Paul/0000-0001-7831-3953; Tennant, David/0000-0002-9575-3368;
   Lake, Bella/0000-0003-0034-0964
NR 5
TC 0
Z9 0
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1236
EP 1238
DI 10.1016/j.jmmm.2006.10.692
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700233
ER

PT J
AU Chang, LJ
   Terashita, H
   Schweika, W
   Chen, YY
   Gardner, JS
AF Chang, L. J.
   Terashita, H.
   Schweika, W.
   Chen, Y. Y.
   Gardner, J. S.
TI HoTbTi2O7, the mixtures of spin ice and spin liquid
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE frustrated magnetic system; neutron scattering; pyrochlore; spin ice;
   spin liquid; specific heat; magnetic susceptibility
AB Polycrystalline samples of HO2-xTbxTi2O7 (X = 0.5, 1, and 1.5) have been prepared and characterized. No long-range order is observed for HoTbTi2O7 in magnetization and specific heat measurements down to 2K. The low-energy magnetic excitation measurements suggests that HoTbTi2O7 possesses both characteristics of spin ice and spin liquid in the ground state. (c) 2006 Elsevier B.V. All rights reserved.
C1 Natl Tsing Hua Univ, Nucl Sci & Technol Dev Ctr, Hsinchu 300, Taiwan.
   Res Ctr Julich, IFF Scattering Methods, D-52425 Julich, Germany.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   NIST, Ctr Neutron Res, Bethesda, MD 20889 USA.
RP Chang, LJ (reprint author), Natl Tsing Hua Univ, Nucl Sci & Technol Dev Ctr, Hsinchu 300, Taiwan.
EM ljchang@mx.nthu.edu.tw
RI Gardner, Jason/A-1532-2013
NR 5
TC 5
Z9 5
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1293
EP 1294
DI 10.1016/j.jmmm.2006.10.445
PN 2
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700252
ER

PT J
AU Tsukamoto, M
   Batista, C
   Kawashima, N
AF Tsukamoto, Mitsuaki
   Batista, Cristian
   Kawashima, Naoki
TI Quantum Monte Carlo simulation for S=1 Heisenberg model with uniaxial
   anisotropy
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE quantum phase transition; quantum Monte Carlo; Heisenberg model
ID BOSE-EINSTEIN CONDENSATION; FIELD
AB We perform quantum Monte Carlo simulations for S = 1 Heisenberg model with an uniaxial anisotropy. The system exhibits a phase transition as we vary the anisotropy and a long range order appears at a finite temperature when the exchange interaction J is comparable to the uniaxial anisotropy D. We investigate quantum critical phenomena of this model and obtain the line of the phase transition which approaches a power-law with logarithmic corrections at low temperature. We derive the form of logarithmic corrections analytically and compare it to our simulation results. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
   Los Alamos Natl Lab, Condensed Matter & Stat Phys, Los Alamos, NM 87545 USA.
RP Tsukamoto, M (reprint author), Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
EM mitsuaki@issp.u-tokyo.ac.jp
NR 9
TC 1
Z9 1
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1360
EP 1361
DI 10.1016/j.jmmm.2006.10.383
PN 2
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700275
ER

PT J
AU Ye, JA
   Rodriguez, YW
   Belanger, DP
   Fernandez-Baca, JA
AF Ye, J. A.
   Rodriguez, Y. W.
   Belanger, D. P.
   Fernandez-Baca, J. A.
TI The order parameter critical exponent of the chiral phase transition in
   VF2
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE chiral universality; order-parameter; magnetic phase transition
ID NEUTRON-SCATTERING; ANTIFERROMAGNET; CSMNBR3; UNIVERSALITY; BETA-MNO2;
   BEHAVIOR
AB The chiral order parameter exponent beta = 0.175 +/- 0.015 has been measured in d = 3 insulating helimagnet VF2 using neutron scattering. As predicted, this value is much smaller than the d 3 X - Y model exponent beta = 0.35. (c) 2006 Elsevier B.V. All rights reserved.
C1 Ctr Neutron Scattering, Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Belanger, DP (reprint author), Ctr Neutron Scattering, Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM dave@dave.ucsc.edu
RI Fernandez-Baca, Jaime/C-3984-2014
OI Fernandez-Baca, Jaime/0000-0001-9080-5096
NR 15
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1410
EP 1412
DI 10.1016/j.jmmm.2006.10.424
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700291
ER

PT J
AU Goremychkin, EA
   Osborn, R
   Rainford, BD
   Adroja, DT
   Koza, M
AF Goremychkin, E. A.
   Osborn, R.
   Rainford, B. D.
   Adroja, D. T.
   Koza, M.
TI Magnetic dynamics of the spin-glass system PrAu2Si2: An inelastic
   neutron scattering study
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE spin-glass; crystal fields; neutron scattering
ID BEHAVIOR; URH2GE2; ORDER
AB In order to understand the origin of the spin glass ground state in the stoichiometric compound PrAu2Si2, we have performed inelastic neutron scattering measurements of the crystal field (CF) excitation spectrum. The 4f ground state is a Gamma(4) singlet and the first excited level is a Gamma((2))(5) doublet at 0.72 meV. We compare the CF potential with other isostructural compounds to determine what features of the CF splittings are essential in producing spin glass freezing in a structurally ordered compound. (c) 2006 Elsevier B.V. All rights reserved.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   Univ Southampton, Dept Phys, Southampton SO17 1B39, Hants, England.
   Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
   Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France.
RP Goremychkin, EA (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM E.A.Goremychkin@rl.ac.uk
RI Osborn, Raymond/E-8676-2011
OI Osborn, Raymond/0000-0001-9565-3140
NR 8
TC 7
Z9 7
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1535
EP 1536
DI 10.1016/j.jmmm.2006.10.452
PN 2
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700328
ER

PT J
AU Rodriguez, YW
   Anderson, IE
   Belanger, DP
   Nojiri, H
   Ye, F
   Fernandez-Baca, JA
AF Rodriguez, Y. W.
   Anderson, I. E.
   Belanger, D. P.
   Nojiri, H.
   Ye, F.
   Fernandez-Baca, J. A.
TI Low-temperature excitations in a dilute three-dimensional anisotropic
   antiferromagnet
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE dilute antiferromagnetic excitations; inelastic neutron scattering;
   pulsed-field absorption
ID MAGNETIC EXCITATIONS
AB Measurements of the magnetic excitations in the dilute, short-ranged interaction, anisotropic, d = 3 antiferromagnet FexZn1-xF2, with magnetic concentration x = 0.40, were made using pulsed-field spectroscopy and H = 0 inelastic neutron scattering. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
   Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan.
   Oak Ridge Natl Lab, Ctr Neutron Scattering, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Rodriguez, YW (reprint author), Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA.
EM yvonne@dave.ucsc.edu
RI Nojiri, Hiroyuki/B-3688-2011; Ye, Feng/B-3210-2010; Fernandez-Baca,
   Jaime/C-3984-2014
OI Ye, Feng/0000-0001-7477-4648; Fernandez-Baca, Jaime/0000-0001-9080-5096
NR 3
TC 1
Z9 1
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1546
EP 1548
DI 10.1016/j.jmmm.2006.10.558
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700332
ER

PT J
AU Yan, M
   Leaf, G
   Kaper, H
   Novosad, V
   Vavassori, P
   Camley, RE
   Grimsditch, M
AF Yan, M.
   Leaf, G.
   Kaper, H.
   Novosad, V.
   Vavassori, P.
   Camley, R. E.
   Grimsditch, M.
TI Dynamic origin of stripe domains in cobalt bars
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE nanomagnetism; micromagnetic modeling; magnetic domain structure; spin
   dynamics
ID PATTERNS
AB Based on dynamical calculations, we theoretically study the nucleation of stripe domains in single-crystal Co bars. Three different stripe domain structures at remanence are obtained in micromagnetic simulations depending on different field histories. We show that the nucleation of all three stripe domains are related to soft mode instabilities. When the field is along the long axis of the bar, the remanent stripe domain structure is shown to be generated by a standing-wave mode, that has the same spatial structure as the stripes at remanence and goes soft at a second-order phase transition where the stripe domains emerge. For the other two directions of the field, we find that the symmetry of soft modes is consistent with the change in symmetry of the ground state but in these cases the phase transition is first order. (c) 2006 Published by Elsevier B.V.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
   Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
   Univ Colorado, Dept Phys, Colorado Springs, CO 80918 USA.
RP Novosad, V (reprint author), Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
EM novosad@ani.gov
RI Novosad, Valentyn/C-2018-2014; Novosad, V /J-4843-2015; Vavassori,
   Paolo/B-4299-2014
OI Vavassori, Paolo/0000-0002-4735-6640
NR 12
TC 0
Z9 0
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1596
EP 1598
DI 10.1016/j.jmmm.2006.10.1127
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700349
ER

PT J
AU Wu, YZ
   Qiu, ZQ
   Schmid, AK
AF Wu, Y. Z.
   Qiu, Z. Q.
   Schmid, A. K.
TI Spin-dependent quantum interference from MgO thin films grown on Fe(001)
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE MgO; spin-polarized electron reflection; unoccupied energy band
ID GIANT TUNNELING MAGNETORESISTANCE; ROOM-TEMPERATURE; JUNCTIONS
AB Spin-dependent electron reflection from MgO thin films grown on Fe(001) was investigated with spin-polarized low-energy electron microscopy (SPLEEM). We found the electron reflectivity exhibits quantum interference from MgO energy bands with Delta(1) symmetry, and a bulk-like MgO energy gap is fully established for MgO film thicker than 3 atomic monolayers. The spin-dependent electron reflectivity from the MgO/Fe interface oscillates with the MgO thickness, which was further proved by the magnetic domain imaging. (c) 2006 Elsevier B.V. All rights reserved.
C1 Fudan Univ, Dept Phys, Appl Surface Phys Lab, Shanghai 200433, Peoples R China.
   Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, NCEM, Berkeley, CA 94720 USA.
RP Wu, YZ (reprint author), Fudan Univ, Dept Phys, Appl Surface Phys Lab, Shanghai 200433, Peoples R China.
EM wuyizheng@fudan.edu.cn
RI wu, YiZheng/O-1547-2013; Wu, yizheng/P-2395-2014; Qiu, Zi
   Qiang/O-4421-2016
OI Wu, yizheng/0000-0002-9289-1271; Qiu, Zi Qiang/0000-0003-0680-0714
NR 11
TC 2
Z9 2
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1629
EP 1631
DI 10.1016/j.jmmm.2006.10.482
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700361
ER

PT J
AU Herrero-Albillos, J
   Bartolome, F
   Garcia, LM
   Campo, J
   Young, AT
   Funk, T
   Cuello, GJ
AF Herrero-Albillos, J.
   Bartolome, F.
   Garcia, L. M.
   Campo, J.
   Young, A. T.
   Funk, T.
   Cuello, G. J.
TI Ferrimagnetic correlations in paramagnetic ErCO2
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE laves phases; X-ray magnetic circular dichroism; small angle neutron
   scattering; short-range order
AB We have performed X-ray magnetic circular dichroism experiments on ErCo2 in order to measure the Er and Co net magnetic moments above and below its ferrimagnetic transition. The results demonstrate the occurrence of an unexpected antiparallel alignment of Co and Er sublattices almost 30 K above the magnetic transition. We attribute this antiparallel alignment to magnetic short-range order. We have characterized the temperature dependence of the magnetic correlation length (xi) with small angle neutron scattering measurements. We observe the expected divergence of xi right above T-c and, a wide region well within the paramagnetic phase, where the correlation length has an almost constant value of 7 angstrom. We have further observed a direct correlation between Co magnetic moment and xi: at the onset of the long range order both magnitudes experience an abrupt increase, while the temperature range at which xi has a constant value coincides with the change of sign of the Co magnetic moment. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Zaragoza, CSIC, Dept Fis Mat Condensada, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain.
   Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France.
RP Herrero-Albillos, J (reprint author), Univ Zaragoza, CSIC, Dept Fis Mat Condensada, Inst Ciencia Mat Aragon, Pedro Cerbuna 12, E-50009 Zaragoza, Spain.
EM Julia.Herrero@unizar.es
RI Herrero-Albillos, Julia/B-9837-2009; Cuello, Gabriel/C-5831-2009;
   Herrero-Albillos, Julia/I-5462-2012; Bartolome, Fernando/K-1700-2014;
   Campo Ruiz, Jesus Javier/L-6558-2014
OI Herrero-Albillos, Julia/0000-0002-0901-8341; Cuello,
   Gabriel/0000-0003-3844-0602; Herrero-Albillos,
   Julia/0000-0002-0901-8341; Bartolome, Fernando/0000-0002-0047-1772;
   Campo Ruiz, Jesus Javier/0000-0002-3600-1721
NR 5
TC 10
Z9 10
U1 1
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1645
EP 1647
DI 10.1016/j.jmmm.2006.10.863
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700367
ER

PT J
AU Kang, JS
   Kim, G
   Olson, CG
   Kwon, YS
   Han, SW
   Min, BI
AF Kang, J.-S.
   Kim, G.
   Olson, C. G.
   Kwon, Y. S.
   Han, S. W.
   Min, B. I.
TI Angle-resolved photoemission spectroscopy study of CeTe2
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE CeTe2; CDW; ARPES
AB The Ce 4f electronic structure of a CDW system CeTe2 has been investigated using high-resolution angle-resolved photoemission spectroscopy (ARPES). By employing the fine-structure (FS) resonance, the Ce 4f ARPES spectra have been measured. The FS resonance ARPES shows a typical two-peak structure with the peaks at similar to -4 and similar to -1 eV, in which the latter peak shifts with increasing emission angle by similar to 300 meV. The Ce 4f states have the negligibly small intensity near E-F, reflecting the minor contribution from Ce 4f electrons to the metallic ground state of CeTe2. This implies that Te(1) 5p and Ce 5d electrons are involved in the CDW formation in CeTe2. (c) 2006 Elsevier B.V. All rights reserved.
C1 Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea.
   Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
   Seoul Natl Univ, CSCMR, Seoul 151742, South Korea.
   Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea.
RP Kang, JS (reprint author), Catholic Univ Korea, Dept Phys, Puchon 420743, South Korea.
EM kangjs@catholic.ac.kr
NR 11
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 1750
EP 1752
DI 10.1016/j.jmmm.2006.10.580
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700398
ER

PT J
AU Deen, PP
   Yokaichiya, F
   Paolasini, L
   Lee, S
   de Santis, A
   Bobba, F
   Cucolo, AM
AF Deen, P. P.
   Yokaichiya, F.
   Paolasini, L.
   Lee, S.
   de Santis, A.
   Bobba, F.
   Cucolo, A. M.
TI Electronic and magnetic order in La0.7Ca0.3MnO3/YBa2Cu3O7-delta
   superlattices
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE superlattice; superconductivity; ferromagnetism; resonant X-ray
   scattering
ID X-RAY-SCATTERING
AB Resonant X- ray scattering experiments have been performed on a heterostructure comprising ferromagnetic (La0.7Ca0.3MnO3)(100 angstrom) A and superconducting (YBa2Cu3O7-(delta))(100 angstrom) blocks. These measurements have probed a superstructure with wavevector q = (0. 5 0.50), originating from the distortion of the MnO6 octahedra responsible for the ferromagnetic state in the La0.7Ca0.3MnO3 blocks. An intriguing temperature dependence of the integrated intensities indicates the rotation of the distorted MnO6 octahedra with the onset of both ferromagnetic and superconducting order, correlated via SQUID magnetisation and resistivity measurements. (c) 2006 Elsevier B. V. All rights reserved.
C1 Inst Laue Langevin, F-38042 Grenoble, France.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
   European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   Univ Salerno, CNR, INFM, Supermat Lab, I-84081 Baronissi, Italy.
   Univ Salerno, Dept Phys, I-84081 Baronissi, Italy.
RP Deen, PP (reprint author), Inst Laue Langevin, 6 Rue Jules Horowitz,BP 156, F-38042 Grenoble, France.
EM deen@ill.fr
NR 4
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 2286
EP 2288
DI 10.1016/j.jmmm.2006.10.750
PN 3
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 185ON
UT WOS:000247720400138
ER

PT J
AU Porta, M
   Castan, T
   LLoveras, P
   Planes, A
   Saxena, A
AF Porta, Marcel
   Castan, Teresa
   LLoveras, Pol
   Planes, Antoni
   Saxena, Avadh
TI Spatially correlated disorder in striped precursor magnetic modulations
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE magnetic precursors; quenched disorder; pair correlation function
AB We use a Ginzburg-Landau model that includes long-range dipolar interactions and spatially correlated quenched-in disorder coupled to the local magnetization to study the properties of the precursor magnetic modulations as a function of the characteristics of the disorder. We find that although the modulation pattern is very robust and does not depend on details of the pair correlation function G(r), the scaling behaviour of the characteristic length of the striped magnetic modulations depends on the behaviour of G(r) for small values of r. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Barcelona, Fac Fis, Dept Estructura & Constituents Materia, Barcelona 08028, Spain.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Castan, T (reprint author), Univ Barcelona, Fac Fis, Dept Estructura & Constituents Materia, Diagonal 647, Barcelona 08028, Spain.
EM teresa@ecm.ub.es
RI Lloveras, Pol/M-3775-2014; Planes, Antoni/O-1904-2015; 
OI Lloveras, Pol/0000-0003-4133-2223; Planes, Antoni/0000-0001-5213-5714;
   Porta Tena, Marcel/0000-0001-7582-9671
NR 5
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 2641
EP 2643
DI 10.1016/j.jmmm.2006.11.056
PN 3
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 185ON
UT WOS:000247720400258
ER

PT J
AU Fischer, P
   Kim, DH
   Mesler, BL
   Chao, W
   Anderson, EH
AF Fischer, P.
   Kim, D.-H.
   Mesler, B. L.
   Chao, W.
   Anderson, E. H.
TI Magnetic soft X-ray microscopy: Imaging spin dynamics at the nanoscale
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE magnetic X-ray microscopy; fresnel zone plate; magnetic domains; spin
   dynamics
ID RESOLUTION; MOTION
AB Time-resolved magnetic X-ray microscopy combines in a unique way spatial resolution down to 15 nm with a temporal resolution of less than 100 ps. The former is enabled through state-of-the-art Fresnel zone plates used as X-ray optical elements and the latter is limited by the inherent time structure of current synchrotron radiation X-ray sources. Using a stroboscopic pump and probe scheme spin dynamics in magnetic systems of confined geometries can be imaged with great detail. The magnetization of the elements is excited with fast electronic pulses with a rise time of 100 ps that are launched into waveguide structures. Varying the delay time between the pump and the X-ray probing pulses one can image in real space the temporal evolution of the magnetic configuration in nanoscale elements. This paper is based on an invited talk given at the ICM2006 conference and provides an overview of the current status of time-resolved soft X-ray microscopy. Studies of vortex dynamics in rectangular structures are reported as a specific example. (c) 2006 Elsevier B.V. All rights reserved.
C1 LBNL, Ctr Xray Opt, Berkeley, CA 94720 USA.
RP Fischer, P (reprint author), LBNL, Ctr Xray Opt, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM PJFischer@lbl.gov
RI Fischer, Peter/A-3020-2010; Kim, Dong-Hyun/F-7195-2012; MSD,
   Nanomag/F-6438-2012
OI Fischer, Peter/0000-0002-9824-9343; 
NR 18
TC 9
Z9 9
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 2689
EP 2692
DI 10.1016/j.jmmm.2006.10.1098
PN 3
PG 4
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 185ON
UT WOS:000247720400274
ER

PT J
AU Beleggia, M
   Schofield, MA
   Zhu, Y
   Pozzi, G
AF Beleggia, M.
   Schofield, M. A.
   Zhu, Y.
   Pozzi, G.
TI Quantitative domain wall width measurement with coherent electrons
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE electron interferometry; magnetic domain; shadow imaging; domain wall
   width; electron holography
AB Quantitative measurements of domain wall widths in a magnetic thin foil of Nd2Fe14B are obtained by the analysis of coherent shadow deformation of the biprism in an electron microscope. Information related to the phase gradient in the direction, perpendicular to the biprism is extracted by comparing recorded images and simulations computed according to the experimental electron-optical configuration and by varying the domain wall width w. We demonstrate the usefulness of the technique for extraction of magnetic information at the nanometer scale. (c) 2006 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
   Univ Bologna, Dipartimento Fis, I-40127 Bologna, Italy.
RP Beleggia, M (reprint author), Brookhaven Natl Lab, Bldg 480, Upton, NY 11973 USA.
EM beleggia@bnl.gov
OI Beleggia, Marco/0000-0002-2888-1888
NR 5
TC 4
Z9 4
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 2696
EP 2698
DI 10.1016/j.jmmm.2006.10.995
PN 3
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 185ON
UT WOS:000247720400276
ER

PT J
AU Tishin, AM
   Derkach, AV
   Spichkin, YI
   Kuz'min, MD
   Chernyshov, AS
   Gschneidner, KA
   Pecharsky, VK
AF Tishin, A. M.
   Derkach, A. V.
   Spichkin, Y. I.
   Kuz'min, M. D.
   Chernyshov, A. S.
   Gschneidner, K. A., Jr.
   Pecharsky, V. K.
TI Magnetocaloric effect near a second-order magnetic phase transition
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE magnetocaloric effect; magnetization; magnetic phase transitions
ID GADOLINIUM
AB The temperature and magnetic. field dependences of the magnetocaloric effect (adiabatic temperature change DT) were measured in single crystalline and polycrystalline Gd near the Curie point (T-C) using direct method with continuously changing magnetic field (H) at different rates and the more conventional stepping of the magnetic. eld. The peculiarities in Delta T(H) behavior are discussed. The Curie temperature of Gd was obtained by means of Belov-Goryaga (Arrott) plots on the basis of magnetization and magnetocaloric data, and from AC susceptibility measurements. The differences in the obtained values and possible reasons of the differences are discussed. (C) 2006 Elsevier B. V. All rights reserved.
C1 Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia.
   Adv Magnet Technol & Consulting Ltd, Moscow 117393, Russia.
   IFW Dresden, Leibniz Inst Festkoper & Werkstoffforsch, D-01171 Dresden, Germany.
   Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
RP Derkach, AV (reprint author), Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia.
EM deresh@mail.ru
RI Tishin, Alexander/E-8705-2014; 
OI Tishin, Alexander/0000-0003-2252-7279; Spichkin,
   Yury/0000-0002-6088-5395
NR 15
TC 29
Z9 29
U1 1
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP 2800
EP 2804
DI 10.1016/j.jmmm.2006.10.1056
PN 3
PG 5
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 185ON
UT WOS:000247720400309
ER

PT J
AU Heffner, RH
   MacLaughlin, DE
   Sonier, JE
   Hundley, MF
   Thompson, JD
AF Heffner, R. H.
   MacLaughlin, D. E.
   Sonier, J. E.
   Hundley, M. F.
   Thompson, J. D.
TI Two-fluid model of heavy fermion formation and mu SR Knight shift
   measurements in UBe13
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE heavy fermion; muon spin relaxation; Knight shift
ID SUPERCONDUCTING STATE
AB We analyze mu SR Knight shift data in UBe13 which show a non-linear K-chi relation or 'Knight shift' anomaly. These data are discussed in terms of a two-component susceptibility proposed by Nakatsuji et al., one component corresponding to non-interacting Kondo moments and a second, low-temperature component chi(HF) alpha(1-T/T*) in (T*/T) associated with onset of the heavy fermion state below T*. The data are consistent with this two-fluid scaling law, with T* = 8.9 +/- 0.4 K, and are discussed in terms of the Sommerfeld coefficient and related changes in the low-temperature resistivity, specific heat and NMR relaxation rates in UBe13. (c) 2006 Elsevier B.V. All rights reserved.
C1 Japan Atom Energy Agcy, Ibaraki 3191195, Japan.
   Univ Calif Riverside, Dept Phys, Riverside, CA 92521 USA.
   Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Heffner, RH (reprint author), Japan Atom Energy Agcy, Ibaraki 3191195, Japan.
EM robert.heffner@jaea.go.jp
NR 11
TC 1
Z9 1
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP E6
EP E8
DI 10.1016/j.jmmm.2006.10.054
PN 1
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184TU
UT WOS:000247666000250
ER

PT J
AU Moreno, NO
   Duque, JGS
   Pagliuso, PG
   Rettori, C
   Urbano, RR
   Kimura, T
AF Moreno, N. O.
   Duque, J. G. S.
   Pagliuso, P. G.
   Rettori, C.
   Urbano, R. R.
   Kimura, T.
TI Electron spin resonance (ESR) in multiferroic TbMnO3
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE multiferroic; TbMnO3; ESR
AB We report temperature dependent X-Band (v similar to 9.4 GHz) electron spin resonance (ESR) measurement in a single crystal of TbMnO3. A single Lorentzian ESR line with an isotropic g similar to 1.96 was observed for T >= 120K up to 600K. The ESR signal is attributed to the Mn3+ ions in a insulator environment. For the three crystallographic axes the temperature dependence ESR linewidth shows a strong broadening as the temperature decreases due to the presence of short range magnetic correlations. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, Brazil.
   Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Bell Labs, Lucent Technol, Murray Hill, NJ 07974 USA.
RP Moreno, NO (reprint author), Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, Brazil.
EM nomoreno@fisica.ufs.br
RI Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Urbano,
   Ricardo/F-5017-2012; Moreno, Nelson/H-1708-2012; Inst. of Physics, Gleb
   Wataghin/A-9780-2017
OI Rettori, Carlos/0000-0001-6692-7915; Moreno, Nelson/0000-0002-1672-4340;
   
NR 6
TC 3
Z9 3
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP E364
EP E366
DI 10.1016/j.jmmm.2006.10.281
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700037
ER

PT J
AU Nazaretski, E
   Thompson, JD
   Pelekhov, DV
   Mewes, T
   Wigen, PE
   Kim, J
   Zalalutdinov, M
   Baldwin, JW
   Houston, B
   Hammel, PC
   Movshovich, R
AF Nazaretski, E.
   Thompson, J. D.
   Pelekhov, D. V.
   Mewes, T.
   Wigen, P. E.
   Kim, J.
   Zalalutdinov, M.
   Baldwin, J. W.
   Houston, B.
   Hammel, P. C.
   Movshovich, R.
TI Magnetic resonance force microscopy studies in a thin permalloy film
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE magnetic films; magnetic resonance force microscopy; temperature
   dependence; ferromagnetic resonance
AB A 50 nm thick Permalloy film has been studied using magnetic resonance force microscopy (MRFM). The ferromagnetic resonance signal has been mechanically detected utilizing a cantilever with a Nd2Fe14B tip. The measurements were performed in the temperature range between 10 and 70 K and a DC field applied perpendicular to the surface of the. lm. The microwave field was in the plane. The measurements indicate a decrease of the ferromagnetic resonance field with increasing temperature which may be attributed to temperature-dependent changes of the saturation magnetization. The measurements demonstrate the capability of MRFM to study temperature-dependent phenomena. (C) 2006 Elsevier B. V. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
   Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA.
   SFA Inc, Crofton, MD 21114 USA.
   USN, Res Lab, Washington, DC 20375 USA.
RP Nazaretski, E (reprint author), Los Alamos Natl Lab, MST 10, Los Alamos, NM 87545 USA.
EM evgnaz@lanl.gov
RI Mewes, Tim/B-4796-2009; Hammel, P Chris/O-4845-2014
OI Mewes, Tim/0000-0001-6166-9427; Hammel, P Chris/0000-0002-4138-4798
NR 9
TC 4
Z9 4
U1 0
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP E941
EP E943
DI 10.1016/j.jmmm.2006.10.994
PN 3
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 185ON
UT WOS:000247720400447
ER

PT J
AU Ronning, F
   Capan, C
   Moreno, NO
   Thompson, JD
   Bulaevskii, LN
   Movshovich, R
   Van der Marel, D
AF Ronning, F.
   Capan, C.
   Moreno, N. O.
   Thompson, J. D.
   Bulaevskii, L. N.
   Movshovich, R.
   Van der Marel, D.
TI Magnetic excitations of the 2-D Sm spin layers in Sm(La, Sr)CuO4
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE frustration; heisenberg antiferromagnet; specific heat; cuprate; Sm
ID QUANTUM HEISENBERG-ANTIFERROMAGNET; HIGH-TEMPERATURE; SQUARE LATTICE;
   SUPERCONDUCTORS
AB We present specific heat and susceptibility data on Sm(La, Sr)CuO4 in magnetic fields up to 9T and temperatures down to 100 mK. We find a broad peak in specific heat which is insensitive to magnetic field at a temperature of 1.5K with a value of 2.65J/mol K. The magnetic susceptibility at 5 T continues to increase down to 2 K, the lowest temperature measured. The data suggest that the Sm spin system may be an ideal realization of the frustrated Heisenberg antiferromagnet on the square lattice. (c) 2006 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Fed Sergipe, Dept Fis, BR-49100000 Sao Cristovao, Brazil.
   DPMC Geneva, CH-1211 Geneva, Switzerland.
RP Ronning, F (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM fronning@lanl.gov
RI Moreno, Nelson/H-1708-2012; van der Marel, Dirk/G-4618-2012; 
OI Moreno, Nelson/0000-0002-1672-4340; van der Marel,
   Dirk/0000-0001-5266-9847; Ronning, Filip/0000-0002-2679-7957
NR 10
TC 1
Z9 1
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP E392
EP E393
DI 10.1016/j.jmmm.2006.10.366
PN 2
PG 2
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700047
ER

PT J
AU Sebastian, SE
   Harrison, N
   Batista, CD
   Balicas, L
   Jaime, M
   Sharma, PA
   Kawashima, N
   Fisher, IR
AF Sebastian, Suchitra E.
   Harrison, N.
   Batista, C. D.
   Balicas, L.
   Jaime, M.
   Sharma, P. A.
   Kawashima, N.
   Fisher, I. R.
TI BEC phase boundary in BaCuSi2O6
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article; Proceedings Paper
CT 17th International Conference on Magnetism (ICM 2006)
CY AUG 20-25, 2006
CL Kyoto, JAPAN
SP Int Union Pure & Appl Phys
DE BEC; quantum critical; BaCuSi2O6
ID TLCUCL3
AB Torque magnetisation data are presented which probe the line of second order phase transitions approaching the Bose-Einstein condensation (BEC) quantum critical point (QCP) in BaCuSi2O6. Results reveal that as the temperature is lowered, the phase transition is increasingly dominated by quantum rather than thermal fluctuations near the QCP. (c) 2006 Elsevier B.V. All rights reserved.
C1 Stanford Univ, Dept Appl Phys, Geballe Lab Adv Mat, Stanford, CA 94305 USA.
   Los Alamos Natl Lab, MPA, NHMFL, Los Alamos, NM 87545 USA.
   Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan.
RP Sebastian, SE (reprint author), Univ Cambridge, Cavendish Lab, Madingley Rd, Cambridge CB3 0HE, England.
EM ses59@cani.ac.uk
RI Balicas, Luis/A-3110-2008; Sharma, Peter/G-1917-2011; Jaime,
   Marcelo/F-3791-2015; Batista, Cristian/J-8008-2016; 
OI Sharma, Peter/0000-0002-3071-7382; Jaime, Marcelo/0000-0001-5360-5220;
   Harrison, Neil/0000-0001-5456-7756
NR 9
TC 2
Z9 2
U1 0
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP E460
EP E462
DI 10.1016/j.jmmm.2006.10.394
PN 2
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 184CM
UT WOS:000247618700071
ER

PT J
AU Shiotani, Y
   Gardner, JS
   Sarrao, JL
   Zheng, G
AF Shiotani, Y.
   Gardner, J. S.
   Sarrao, J. L.
   Zheng, Guo-qing
TI Magnetic-field induced ferromagnetism as the origin for the colossal
   magneto-resistance in La1.2Sr1.8Mn2O7
SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
LA English
DT Article
DE CMR; manganese oxide; NMR
ID RESISTIVITY
AB We present a La-139 NMR study on the colossal magneto-resistance (CMR) in double-layered manganese oxide La1.2Sr1.8Mn2O7. Above the Curie temperature TC = 126 K, applying a magnetic field is found to induce a ferromagnetic order that persists up to T = 330 K. The critical field at which the induced magnetic moment is saturated agrees well with the field at which the CMR effect reaches to a maximum. Our results indicate that the CMR observed above TC is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction. (C) 2006 Elsevier B.V. All rights reserved.
C1 Okayama Univ, Dept Phys, Okayama 7008530, Japan.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   RICOH Co Ltd, Kita Ku, Yokohama, Kanagawa 2220033, Japan.
RP Zheng, G (reprint author), Okayama Univ, Dept Phys, Okayama 7008530, Japan.
EM zheng@psun.phys.okayama-u.ac.jp
RI Gardner, Jason/A-1532-2013
NR 7
TC 0
Z9 0
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-8853
J9 J MAGN MAGN MATER
JI J. Magn. Magn. Mater.
PD MAR
PY 2007
VL 310
IS 2
BP E661
EP E663
DI 10.1016/j.jmmm.2006.10.914
PN 3
PG 3
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA 185ON
UT WOS:000247720400349
ER

PT J
AU Chassignet, EP
   Hurlburt, HE
   Smedstad, OM
   Halliwell, GR
   Hogan, PJ
   Wallcraft, AJ
   Baraille, R
   Bleck, R
AF Chassignet, Eric P.
   Hurlburt, Harley E.
   Smedstad, Ole Martin
   Halliwell, George R.
   Hogan, Patrick J.
   Wallcraft, Alan J.
   Baraille, Remy
   Bleck, Rainer
TI The HYCOM (HYbrid Coordinate Ocean Model) data assimilative system
SO JOURNAL OF MARINE SYSTEMS
LA English
DT Article; Proceedings Paper
CT 36th International Liege Colloquium on Ocean Dynamics
CY MAY 03-07, 2004
CL Liege, BELGIUM
DE ocean prediction; data assimilation; HYCOM; ocean modeling; GODAE;
   boundary conditions
ID VERTICAL COORDINATE; NORTH-ATLANTIC; CLOSURE-MODEL; TURBULENCE;
   DIFFUSIVITIES; SIMULATIONS; THERMOCLINE; RESOLUTION; MULTISCALE;
   EQUATIONS
AB This article provides an overview of the effort centered on the HYbrid Coordinate Ocean Model (HYCOM) to develop an eddy-resolving, real-time global and basin-scale ocean hindcast, nowcast, and prediction system in the context of the Global Ocean Data Assimilation Experiment (GODAE). The main characteristics of HYCOM are first presented, followed by a description and assessment of the present near real-time Atlantic forecasting system. Regional/coastal applications are also discussed since an important attribute of the data assimilative HYCOM simulations is the capability to provide boundary conditions to regional and coastal models. The final section describes the steps taken toward the establishment of the fully global eddy-resolving HYCOM data assimilative system and discusses some of the difficulties associated with advanced data assimilation given the size of the problem. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Miami, RSMAS MPO, Miami, FL 33152 USA.
   USN, Res Lab, Stennis Space Ctr, MS 39529 USA.
   Planning Syst Inc, Stennis Space Ctr, MS USA.
   SHOM CMO, Toulouse, France.
   Los Alamos Natl Lab, Los Alamos, NM USA.
RP Chassignet, EP (reprint author), Univ Miami, RSMAS MPO, Miami, FL 33152 USA.
EM echassignet@coaps.fsu.edu
RI Halliwell, George/B-3046-2011
OI Halliwell, George/0000-0003-4216-070X
NR 71
TC 256
Z9 260
U1 2
U2 40
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0924-7963
J9 J MARINE SYST
JI J. Mar. Syst.
PD MAR
PY 2007
VL 65
IS 1-4
BP 60
EP 83
DI 10.1016/j.jmarsys.2005.09.016
PG 24
WC Geosciences, Multidisciplinary; Marine & Freshwater Biology;
   Oceanography
SC Geology; Marine & Freshwater Biology; Oceanography
GA 147LB
UT WOS:000245003400005
ER

PT J
AU Specht, ED
   Goyal, A
   Liu, W
AF Specht, E. D.
   Goyal, A.
   Liu, W.
TI Local epitaxy of YBa2Cu3Ox on polycrystalline Ni measured by x-ray
   microdiffraction
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID CRITICAL-CURRENT DENSITY; GRAIN-BOUNDARY NETWORKS; THIN-FILMS;
   SUPERCONDUCTING TAPES; COATED CONDUCTORS; YBCO FILMS; DEPOSITION;
   DIFFRACTION; PERFORMANCE; TEXTURE
AB Polychromatic synchrotron x-ray microdiffraction is used to determine the epitaxy of YBa2Cu3Ox (YBCO) films grown on polycrystalline Y.15Zr.85O1.925/CeO2/Y2O3/ Ni95W5(Ni) rolling-assisted, biaxially textured substrates (RABiTS). A novel analysis technique is introduced in which the orientation of mosaic films is measured by using a Hough transform to recognize arcs in Laue microdiffraction patterns that correspond to low-index zone axes. While the overall epitaxy is cube-on-cube, grain-by-grain analysis reveals a systematic misorientation of YBCO with respect to Ni: the YBCO [001] rotates toward the direction of the surface normal. The crystal mosaic (for rotation about the rolling direction) measured by a single diffraction pattern sampling a 0.5-mu m(2) surface area is 0.7 degrees full width at half-maximum for YBCO grown on Ni grains with a low tilt; for more highly tilted grains, the YBCO patterns can no longer be measured, presumably due to the large mosaic. The YBCO mosaic over the entire area of a Ni grain is -2.5 degrees and varies with grain size; the mosaic is smaller for larger grains.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Specht, ED (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
EM spechted@ornl.gov
RI Specht, Eliot/A-5654-2009
OI Specht, Eliot/0000-0002-3191-2163
NR 23
TC 5
Z9 5
U1 0
U2 6
PU MATERIALS RESEARCH SOCIETY
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD MAR
PY 2007
VL 22
IS 3
BP 664
EP 674
DI 10.1557/JMR.2007.0091
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142TL
UT WOS:000244672900016
ER

PT J
AU Gu, Z
   Edgar, JH
   Raghothamachar, B
   Dudley, M
   Zhuang, D
   Sitar, Z
   Coffey, DW
AF Gu, Z.
   Edgar, J. H.
   Raghothamachar, B.
   Dudley, M.
   Zhuang, D.
   Sitar, Z.
   Coffey, D. W.
TI Sublimation growth of aluminum nitride on silicon carbide substrate with
   aluminum nitride-silicon carbide alloy transition layer
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID CRYSTALS
AB The advantages of depositing AlN-SiC alloy transition layers on SiC substrates before the seeded growth of bulk AlN crystals were examined. The presence of AlN-SiC alloy layers helped to suppress the SiC decomposition by providing vapor sources of silicon and carbon. In addition, cracks in the final AlN crystals decreased from similar to 5 x 10(6)/mm(2) for those grown directly on SiC substrates to less than I X 10(6)/mm(2) for those grown on AlN-SiC alloy layers because of the intermediate lattice constants and thermal expansion coefficient of AlN-SiC. X-ray diffraction confirmed the formation of pure single-crystalline AlN upon both AlN-SiC alloys and SiC substrates. X-ray topography (XRT) demonstrated that strains present in the AlN crystals decreased as the AlN grew thicker. However, the XRT for AlN crystals grown directly on SiC substrates was significantly distorted with a high overall defect density compared to those grown on AlN-SiC alloys.
C1 Kansas State Univ, Dept Chem Engn, Manhattan, KS 66506 USA.
   SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
   N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
   Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA.
RP Edgar, JH (reprint author), Kansas State Univ, Dept Chem Engn, Manhattan, KS 66506 USA.
EM edgarjh@ksu.edu
RI Raghothamachar, Balaji/B-1094-2008
NR 7
TC 1
Z9 1
U1 1
U2 7
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0884-2914
EI 2044-5326
J9 J MATER RES
JI J. Mater. Res.
PD MAR
PY 2007
VL 22
IS 3
BP 675
EP 680
DI 10.1557/JMR.2007.0077
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142TL
UT WOS:000244672900017
ER

PT J
AU Leenheer, AJ
   Miedaner, A
   Curtis, CJ
   van Hest, MFAM
   Ginley, DS
AF Leenheer, Andrew J.
   Miedaner, Alexander
   Curtis, Calvin J.
   van Hest, Maikel F. A. M.
   Ginley, David S.
TI Fabrication of nanoporous titania on glass and transparent conducting
   oxide substrates by anodization of titanium films
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID SENSITIZED SOLAR-CELLS; NANOTUBE ARRAYS; ANODIC-OXIDATION; TIO2
   NANOTUBES
AB Nanoporous titania (TiO2) or titania nanotubes Could provide a continuous nanostructured electron-conducting anode for organic photovoltaics. In this work, nanoporous titania was formed by anodizing thin films of titanium on both glass and transparent conducting oxide (TCO) substrates. Titanium thin films (500-700 nm) were deposited by radio frequency (RF) magnetron sputtering. Films were anodized in acidic electrolytes containing small amounts of hydrofluoric acid (HF) at constant voltages ranging from 7 to 15 V. Scanning electron microscope (SEM) analysis revealed a nanoporous structure. Nanoporous titania structures were grown on glass in all electrolyte containing sulfuric acid, trisodium citrate, and potassium fluoride, with pore diameters around 50 nm. Analyzing the films at different anodization times, the stages of nanopore formation were elucidated. Additionally, nanoporous titania was formed on a TCO substrate by anodizing in an electrolyte containing acetic acid and hydrofluoric acid. While not completely transparent, the nanoporous titania is promising for use in organic photovoltaics.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Leenheer, AJ (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM andrew_leenheer@nrel.gov
NR 20
TC 17
Z9 18
U1 0
U2 10
PU MATERIALS RESEARCH SOCIETY
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD MAR
PY 2007
VL 22
IS 3
BP 681
EP 687
DI 10.1557/JMR.2007.0078
PG 7
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142TL
UT WOS:000244672900018
ER

PT J
AU Wang, ZG
   Zu, XT
   Gao, F
   Weber, WJ
AF Wang, Zhiguo
   Zu, Xiaotao
   Gao, Fei
   Weber, William J.
TI Atomistic study of the melting behavior of single crystalline wurtzite
   gallium nitride nanowires
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID CHEMICAL-VAPOR-DEPOSITION; INDIUM-PHOSPHIDE NANOWIRES; GAN NANOWIRES;
   GROWTH; PHOTOLUMINESCENCE; PRESSURE; CLUSTERS; ARRAYS
AB Molecular dynamic simulation was used to study the melting behavior of gallium nitride (GaN) nanowires with the Stillinger-Weber potential. Our results reveal that the melting of the nanowires starts from the surface and rapidly extends to the inner regions of nanowires as temperature increases. The melting temperatures increase to saturation values similar to 3100 and similar to 2900 K when the diameters of nanowires are larger than 3.14 and 4.14 nm for the nanowires with [100]- and [110]-oriented lateral facets, respectively. The saturated values are close to the melting temperature of bulk GaN. The low melting temperature of GaN nanowires with small diameter may be associated with the large surfaces of nanowires.
C1 Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
   Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Wang, ZG (reprint author), Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
EM zgwang_dr@yahoo.com
RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012; Wang,
   Zhiguo/B-7132-2009
OI Weber, William/0000-0002-9017-7365; 
NR 36
TC 5
Z9 5
U1 0
U2 5
PU MATERIALS RESEARCH SOCIETY
PI WARRENDALE
PA 506 KEYSTONE DR, WARRENDALE, PA 15086 USA
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD MAR
PY 2007
VL 22
IS 3
BP 742
EP 747
DI 10.1557/JMR.2007.0095
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142TL
UT WOS:000244672900027
ER

PT J
AU Zhu, YT
   Wang, ZL
   Langdon, TG
AF Zhu, Yuntian T.
   Wang, Zhong Lin
   Langdon, Terence G.
TI Special issue: Nanostructured materials-processing, structures,
   properties and applications
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Editorial Material
C1 Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA.
   Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
   Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA.
   Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA.
RP Zhu, YT (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, POB 1663, Los Alamos, NM 87545 USA.
EM yzhu@lanl.gov; zhong.wang@mse.gatech.edu; langdon@usc.edu
RI Langdon, Terence/B-1487-2008; Wang, Zhong Lin/E-2176-2011
OI Wang, Zhong Lin/0000-0002-5530-0380
NR 0
TC 2
Z9 2
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD MAR
PY 2007
VL  42
IS 5
BP 1401
EP 1402
DI 10.1007/s10853-006-1292-0
PG 2
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142WZ
UT WOS:000244683100001
ER

PT J
AU Wu, XL
   Ma, E
   Zhu, YT
AF Wu, Xiaolei
   Ma, En
   Zhu, Y. T.
TI Deformation defects in nanocrystalline nickel
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Nanomaterisls - Materials and Processing for Functional Applications
   held at the 2006 TMS Spring Meeting
CY MAR 13-16, 2006
CL San Antonio, TX
SP TMS
ID MOLECULAR-DYNAMICS SIMULATION; TENSILE DEFORMATION; FORMATION MECHANISM;
   STRAIN-RATE; METALS; NI; AL; PLASTICITY; TWINS; MICROSTRUCTURE
AB Defects induced by plastic deformation in electrodeposited, fully dense nanocrystalline (nc) Ni with an average grain size of 25 nm have been characterized by means of high resolution transmission electron microscopy. The nc Ni was deformed under uniaxial tension at liquid-nitrogen temperature. Trapped full dislocations were observed in the grain interior and near the grain boundaries. In particular, these dislocations preferred to exist in the form of dipoles. Deformation twinning was confirmed in nc grains and the most proficient mechanism is the heterogeneous nucleation via emission of partial dislocations from the grain boundaries.
C1 Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
   Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA.
   Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA.
RP Wu, XL (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
EM xlwu@imech.ac.cn
RI Zhu, Yuntian/B-3021-2008; ping, jiang/C-7263-2008; Ma, En/A-3232-2010
OI Zhu, Yuntian/0000-0002-5961-7422; ping, jiang/0000-0002-0503-140X; 
NR 38
TC 21
Z9 24
U1 3
U2 23
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD MAR
PY 2007
VL  42
IS 5
BP 1427
EP 1432
DI 10.1007/s10853-006-1229-7
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142WZ
UT WOS:000244683100004
ER

PT J
AU Shen, TD
   Zhang, X
   Han, K
   Davy, CA
   Aujla, D
   Kalu, PN
   Schwarz, RB
AF Shen, T. D.
   Zhang, X.
   Han, K.
   Davy, C. A.
   Aujla, D.
   Kalu, P. N.
   Schwarz, R. B.
TI Structure and properties of bulk nanostructured alloys synthesized by
   flux-melting
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Nanomaterisls - Materials and Processing for Functional Applications
   held at the 2006 TMS Spring Meeting
CY MAR 13-16, 2006
CL San Antonio, TX
SP TMS
ID SEVERE PLASTIC-DEFORMATION; NANOCRYSTALLINE COPPER; CU-AG; ULTRAHIGH
   STRENGTH; TENSILE PROPERTIES; ROOM-TEMPERATURE; GRAIN-SIZE;
   MICROSTRUCTURE; METALS; DUCTILITY
AB Nanomaterials can easily be prepared as thin films and powders, but are much harder to prepare in bulk form. Nanostructured materials are prepared mainly by consolidation, electrodeposition, and deformation. These processing techniques have problems such as porosity, contamination, high cost, and limitations in refining the grain size. Since most bulk engineering metals are initially prepared by casting, we developed a casting technique, flux-melting and melt-solidification, to prepare bulk nanostructured alloys. The casting technique has such advantages as simplicity, low cost, and full density. In our method, Ag-Cu alloys were melted in B2O3 flux, which removed most of the impurities, mainly oxides, in the melts. Upon solidifying the melt at a relatively slow cooling rate on the order of 10(1)-10(2) K/s a large undercooling of similar to 0.25 T-m (where T-m is the melting temperature) was achieved. This large undercooling leads to the formation of bulk nanostructured Ag-Cu alloys composed of alternative Ag/Cu lamella and nanocrystals, both similar to 50 nm in dimension. Our liquid-processed alloys are fully dense and relatively free from contamination. The nanostructured Ag-Cu alloys have similar yield strength in tension and in compression. The as-quenched alloys have yield strength of 400 MPa, ultimate tensile strength (UTS) of 550 MPa, and plastic elongation of similar to 8%. The UTS was further increased to similar to 830 MPa after the as-quenched alloy rod was cold drawn to a strain of similar to 2. The nanostructured Ag-Cu alloys show a high electrical conductivity (similar to 80% that of International Annealed Copper Standard), a slight strain hardening (strain-hardening coefficient of 0.10), and a high thermal stability up to a reduced temperature of 2/3 T-m. Some of these behaviors are different than those found in previous bulk nanostructured materials synthesized by solid state methods, and are explained based on the unique nanostructures achieved by our flux-melting and melt-solidification technique.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
   Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
RP Shen, TD (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Mail Stop G755, Los Alamos, NM 87545 USA.
EM tdshen@lanl.gov
RI Zhang, Xinghang/H-6764-2013
OI Zhang, Xinghang/0000-0002-8380-8667
NR 63
TC 7
Z9 8
U1 0
U2 15
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD MAR
PY 2007
VL  42
IS 5
BP 1638
EP 1648
DI 10.1007/s10853-006-1096-2
PG 11
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142WZ
UT WOS:000244683100026
ER

PT J
AU Beyerlein, IJ
   Alexander, DJ
   Tome, CN
AF Beyerlein, Irene J.
   Alexander, David J.
   Tome, Carlos N.
TI Plastic anisotropy in aluminum and copper pre-strained by equal channel
   angular extrusion
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Nanomaterisls - Materials and Processing for Functional Applications
   held at the 2006 TMS Spring Meeting
CY MAR 13-16, 2006
CL San Antonio, TX
SP TMS
ID WORK-HARDENING BEHAVIOR; MECHANICAL-PROPERTIES; TEXTURE EVOLUTION;
   SELF-CONSISTENT; SINGLE-CRYSTALS; SIMPLE SHEAR; PATH CHANGES;
   FLOW-STRESS; FCC METALS; DEFORMATION
AB The mechanical response of as-processed equal channel angular extrusion materials is anisotropic, depending on both direction and sense of straining. The stress-strain curves exhibit hardening characteristics different from the usual work hardening responses, e.g., Stages I-IV, expected in annealed fcc metals under monotonic loading. In this work, the anisotropic flow responses of two pure fcc metals, Al and Cu, processed by route Bc are evaluated and compared based on pre-strain level (number of passes), direction of reloading, sense of straining (i.e., compression versus tension), and their propensity to generate subgrain microstructures and to rearrange, should the slip activity change. In most cases, either macroscopic work softening or strain intervals with little to no work hardening are observed. Application of a crystallographically based single-crystal hardening law for strain-path changes [Beyerlein and Tome, Int. J. Plasticity (2007)] incorporated into a visco-plastic self-consistent (VPSC) model supports the hypothesis that suppression of work hardening is due to reversal or cross effects operating at the grain level.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Beyerlein, IJ (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM irene@lanl.gov
RI Tome, Carlos/D-5058-2013; Beyerlein, Irene/A-4676-2011
NR 66
TC 18
Z9 18
U1 0
U2 4
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD MAR
PY 2007
VL  42
IS 5
BP 1733
EP 1750
DI 10.1007/s10853-006-0906-x
PG 18
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142WZ
UT WOS:000244683100034
ER

PT J
AU Wang, YM
   Huang, JY
   Jiao, T
   Zhu, YT
   Hamza, AV
AF Wang, Y. M.
   Huang, J. Y.
   Jiao, T.
   Zhu, Y. T.
   Hamza, A. V.
TI Abnormal strain hardening in nanostructured titanium at high strain
   rates and large strains
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Nanomaterisls - Materials and Processing for Functional Applications
   held at the 2006 TMS Spring Meeting
CY MAR 13-16, 2006
CL San Antonio, TX
SP TMS
ID SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; ALPHA-TITANIUM; PURE
   TITANIUM; NANOCRYSTALLINE; BEHAVIOR; TEMPERATURE; COPPER
AB Commercial purity nanostructured titanium prepared by equal channel angular pressing plus cold rolling (grain size similar to 260 nm) exhibits a nonnegligible strain hardening behavior at large compressive strains (> 15%) and quasistatic loading conditions. The degree of the strain hardening increases with increasing strain rates and becomes more pronounced at dynamic loading rates. This behavior is in contrast with what we have seen so far in other nanostructured materials, where flat stress-strain curves are often seen. It was concluded from transmission electron microscopy investigations that in addition to dislocation slips, deformation twinning may have played a significant role in plastic deformation of nanostructured Ti. The structural failure behavior is in-situ recorded by a CCD camera and reasoned according to the microscopic observations.
C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA.
   Boston Coll, Dept Phys, Chestnut Hill, MA 02467 USA.
   Brown Univ, Dept Mech Engn, Providence, RI 02912 USA.
   Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Wang, YM (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, 7000 East Ave, Livermore, CA 94550 USA.
EM ymwang@llnl.gov
RI Zhu, Yuntian/B-3021-2008; Huang, Jianyu/C-5183-2008; Wang, Yinmin
   (Morris)/F-2249-2010
OI Zhu, Yuntian/0000-0002-5961-7422; Wang, Yinmin
   (Morris)/0000-0002-7161-2034
NR 17
TC 26
Z9 26
U1 0
U2 18
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD MAR
PY 2007
VL  42
IS 5
BP 1751
EP 1756
DI 10.1007/s10853-006-0822-0
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142WZ
UT WOS:000244683100035
ER

PT J
AU Misra, A
   Hoagland, RG
AF Misra, A.
   Hoagland, R. G.
TI Plastic flow stability of metallic nanolaminate composites
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Nanomaterisls - Materials and Processing for Functional Applications
   held at the 2006 TMS Spring Meeting
CY MAR 13-16, 2006
CL San Antonio, TX
SP TMS
ID DEFORMATION MECHANISMS; MULTILAYER COMPOSITES; DISLOCATIONS; STRENGTH;
   BEHAVIOR; SLIP
AB Metallic nanolaminate composites synthesized via physical vapor deposition possess ultra-high strengths, often within a factor of two to three of the theoretical strength limit, when the bilayer periods are on the order of a few nanometers. The origins of failure in vapor-deposited nanolaminate composites at large plastic strains have not been reported in any significant detail. In this article, we present an overview of the length-scale dependent plastic flow stability of metallic nanolaminates deformed to large plastic strains via room temperature rolling.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Misra, A (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM amisra@lanl.gov
RI Hoagland, Richard/G-9821-2012; Misra, Amit/H-1087-2012
NR 19
TC 55
Z9 55
U1 3
U2 36
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0022-2461
J9 J MATER SCI
JI J. Mater. Sci.
PD MAR
PY 2007
VL  42
IS 5
BP 1765
EP 1771
DI 10.1007/s10853-006-0895-9
PG 7
WC Materials Science, Multidisciplinary
SC Materials Science
GA 142WZ
UT WOS:000244683100037
ER

PT J
AU Ashley, NJ
   Grimes, RW
   McClellan, KJ
AF Ashley, Nicholas J.
   Grimes, Robin W.
   McClellan, Ken J.
TI Accommodation of non-stoichiometry in TiN1-x and ZrN1-x
SO JOURNAL OF MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT International Conference on Nonstoichiometric Compounds
CY APR 03-08, 2005
CL Kauai, HI
SP Engn Conf Int
ID TITANIUM NITRIDE; STATE
AB Atomic scale computer simulations, based on density functional calculations, are used to investigate the variation of lattice parameter and bulk modulus with nitrogen deficient non-stoichiometry in titanium and zirconium nitrides. Results assuming a simple distribution of nitrogen vacancies best reflect the remarkably small observed changes in lattice parameter over the whole stoichiometry range for both materials. These are facilitated by small charge transfer to the cations immediately surrounding the nitrogen vacancy and small accompanying lattice relaxations. Conversely variations in bulk modulus are considerable but can be correlated, via a simple function, to the change in materials density.
C1 Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England.
   Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
RP Grimes, RW (reprint author), Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England.
EM r.grimes@ic.ac.uk
NR 21
TC 26
Z9 26
U1 6
U2 18
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0022-2461
EI 1573-4803
J9 J MATER SCI
JI J. Mater. Sci.
PD MAR
PY 2007
VL 42
IS 6
BP 1884
EP 1889
DI 10.1007/s10853-006-1321-z
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA 145UA
UT WOS:000244889600004
ER

PT J
AU Anderson, IE
AF Anderson, Iver E.
TI Development of Sn-Ag-Cu and Sn-Ag-Cu-X alloys for Pb-free electronic
   solder applications
SO JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
LA English
DT Article
ID LEAD-FREE SOLDERS; AG3SN PLATE FORMATION; AU/NI SURFACE FINISH;
   INTERMETALLIC COMPOUND; INTERFACIAL REACTIONS; EUTECTIC SOLDER; JOINTS;
   MICROSTRUCTURE; TEMPERATURE; COPPER
AB The global electronic assembly community is striving to accommodate the replacement of Pb-containing solders, primarily Sn-Pb alloys, with Pb-free solders due to environmental regulations and market pressures. Of the Pb-free choices, a family of solder alloys based on the Sn-Ag-Cu (SAC) ternary eutectic (T-eut. = 217 degrees C) composition have emerged with the most potential for broad use across the industry, but the preferred (typically near-eutectic) composition is still in debate. This review will attempt to clarify the characteristic microstructures and mechanical properties of the current candidates and recommend alloy choices, a maximum operating temperature limit, and directions for future work. Also included in this review will be an exploration of several SAC + X candidates, i.e., 4th element modifications of SAC solder alloys, that are intended to control solder alloy undercooling and solidification product phases and to improve the resistance of SAC solder joints to high temperature thermal aging effects. Again, preliminary alloy recommendations will be offered, along with suggestions for future work.
C1 Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
RP Anderson, IE (reprint author), Iowa State Univ, Ames Lab, US DOE, 222 Met Dev Bldg, Ames, IA 50011 USA.
EM andersoni@ameslab.gov
NR 63
TC 138
Z9 142
U1 10
U2 47
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0957-4522
J9 J MATER SCI-MATER EL
JI J. Mater. Sci.-Mater. Electron.
PD MAR
PY 2007
VL 18
IS 1-3
BP 55
EP 76
DI 10.1007/s10854-006-9011-9
PG 22
WC Engineering, Electrical & Electronic; Materials Science,
   Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA 117DT
UT WOS:000242853600005
ER

PT J
AU Vianco, PT
   Rejent, JA
   Fossum, AF
   Neilsen, MK
AF Vianco, Paul T.
   Rejent, Jerome A.
   Fossum, Arlo F.
   Neilsen, Michael K.
TI Compression stress-strain and creep properties of the 52In-48Sn and
   97In-3Ag low-temperature Pb-free solders
SO JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
LA English
DT Article
ID TERNARY 95.5SN-3.9AG-0.6CU SOLDER; DEFORMATION; BEHAVIOR
AB Lead (Pb)-free, low melting temperature solders are required for step-soldering processes used to assemble micro-electrical mechanical system (MEMS) and optoelectronic (OE) devices. Stress-strain and creep studies, which provide solder mechanical properties for unified creep-plasticity (UCP) predictive models, were performed on the Pb-free 97In-3Ag (wt.%) and 58In-42Sn solders and counterpart Pb-bearing 80In-15Pb-5Ag and 70In-15Sn-9.6Pb-5.4Cd alloys. Stress-strain tests were performed at 4.4 x 10(-5) s(-1) and 8.8 x 10(-4) s(-1). Stress-strain and creep tests were performed at -25, 25, 75, and 100 degrees C or 125 degrees C. The samples were evaluated in the as-fabricated and post-annealed conditions. The In-Ag solder had yield stress values of 0.5-8.5 MPa. The values of Delta H for steady-state creep were 99 +/- 14 kJ/mol and 46 +/- 11 kJ/mol, indicating that bulk diffusion controlled creep in the as-fabricated samples (former) and fast-diffusion controlled creep in the annealed samples (latter). The In-Sn yield stresses were 1.0-22 MPa and were not dependent on an annealed condition. The steady-state creep Delta H values were 55 +/- 11 kJ/mol and 48 +/- 13 kJ/mol for the as-fabricated and annealed samples, respectively, indicating the fast-diffusion controlled creep for the two conditions. The UCP constitutive models were derived for the In-Ag solder in the as-fabricated and annealed conditions.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Vianco, PT (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM ptvianc@sandia.gov
NR 21
TC 11
Z9 13
U1 1
U2 5
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0957-4522
J9 J MATER SCI-MATER EL
JI J. Mater. Sci.-Mater. Electron.
PD MAR
PY 2007
VL 18
IS 1-3
BP 93
EP 119
DI 10.1007/s10854-006-9013-7
PG 27
WC Engineering, Electrical & Electronic; Materials Science,
   Multidisciplinary; Physics, Applied; Physics, Condensed Matter
SC Engineering; Materials Science; Physics
GA 117DT
UT WOS:000242853600007
ER

PT J
AU Chang, YI
   Konomura, M
   Lo Pinto, P
AF Chang, Yoon I.
   Konomura, Mamoru
   Lo Pinto, Pierre
TI A case for Small Modular Fast Reactor
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 9th GLOBAL International Conference 2005
CY OCT 09-13, 2005
CL Tsukuba, JAPAN
DE fast reactor; modular construction; remote siting; long-life core;
   proliferation resistance
AB This paper describes a 50 MWe Small Modular Fast Reactor (SMFR) design that has been developed jointly by Argonne National Laboratory (ANL), Commissariat a l'Energie Atomique (CEA), and Japan Atomic Energy Agency (JAEA) as an international collaborative effort. Key design innovations include a metallic fueled core with 30-year lifetime and supercritical carbon dioxide Brayton cycle.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
   Japan Atom Energy Agcy, Oarai, Ibaraki 3111393, Japan.
   CEA, Cadarache Ctr, St Paul Les Durance, France.
RP Chang, YI (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM ychang@anl.gov
NR 7
TC 7
Z9 7
U1 1
U2 8
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0022-3131
EI 1881-1248
J9 J NUCL SCI TECHNOL
JI J. Nucl. Sci. Technol.
PD MAR
PY 2007
VL 44
IS 3
BP 264
EP 269
DI 10.1080/18811248.2007.9711281
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 165GL
UT WOS:000246292000004
ER

PT J
AU Herrmann, S
   Li, S
   Simpson, M
AF Herrmann, Steven
   Li, Shelly
   Simpson, Michael
TI Electrolytic reduction of spent light water reactor fuel - Bench-scale
   experiment results
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 9th GLOBAL International Conference 2005
CY OCT 09-13, 2005
CL Tsukuba, JAPAN
DE electrolytic reduction; oxide reduction; electrometallurgical treatment;
   spent light water reactor fuel; lithium chloride; lithium oxide
ID URANIUM
AB A series of experiments were performed to demonstrate the electrolytic reduction of spent light water reactor fuel at bench-scale in a hot cell at the Idaho National Laboratory Materials and Fuels Complex. The process involves the conversion of oxide fuel to metal by electrolytic means, which would then enable subsequent separation and recovery of actinides via existing electrometallurgical technologies, i.e., electrorefining. Four electrolytic reduction runs were performed at bench scale using similar to 500 rnI of molten LiCI-1 wt% Li2O electrolyte at 650 degrees C. In each run, similar to 50g of crushed spent oxide fuel was loaded into a permeable stainless steel basket and immersed into the electrolyte as the cathode. A spiral wound platinum wire was immersed into the electrolyte as the anode. When a controlled electric current was conducted through the anode and cathode, the oxide fuel was reduced to metal in the basket and oxygen gas was evolved at the anode. Salt samples were extracted before and after each electrolytic reduction run and analyzed for fuel and fission product constituents. The fuel baskets following each run were sectioned and the fuel was sampled, revealing an extent of uranium oxide reduction in excess of 98%.
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Herrmann, S (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA.
EM Steven.Herrmann@inl.gov
NR 7
TC 26
Z9 27
U1 0
U2 9
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0022-3131
EI 1881-1248
J9 J NUCL SCI TECHNOL
JI J. Nucl. Sci. Technol.
PD MAR
PY 2007
VL 44
IS 3
BP 361
EP 367
DI 10.1080/18811248.2007.9711295
PG 7
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 165GL
UT WOS:000246292000018
ER

PT J
AU Wigeland, RA
   Bauer, TH
   Hill, RN
   Stillman, JA
AF Wigeland, Roald A.
   Bauer, Theodore H.
   Hill, Robert N.
   Stillman, John A.
TI Impact on geologic repository usage from limited actinide recycle in
   pressurized light water reactors
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 9th GLOBAL International Conference 2005
CY OCT 09-13, 2005
CL Tsukuba, JAPAN
DE repository; actinide; decay; recycle; LWR; thermal; reactor; limited;
   continuous
AB A project has been conducted as part of the U.S. Department of Energy Advanced Fuel Cycle Initiative to evaluate the impact of limited actinide recycling in light water reactors on the utilization of a geologic repository where loading of the repository is constrained by the decay heat of the emplaced materials. In this study, it was assumed that spent PWR fuel was processed, removing the titanium, plutonium, americium, and neptunium, along with the fission products cesium and strontium. Previous work had demonstrated that these elements were responsible for limiting loading in the repository based on thermal constraints. The plutonium, americium, and neptunium were recycled in a PWR, with process waste and spent recycled fuel being sent to the repository. The cesium and strontium were placed in separate storage for 100-300 years to allow for decay prior to disposal. The study examined the effect of single and mutliple recycles of the recovered plutonium, americium, and neptunium, as well as different processing delay times. The potential benefit to the repository was measured by the increase in utilization of repository space as indicated by the allowable linear loading in the repository drifts (tunnels). The results showed that limited recycling would provide only a small fraction of the benefit that could be achieved with repeated processing and recycling, as is possible in fast neutron reactors.
C1 Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA.
RP Wigeland, RA (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM wigeland@anl.gov
NR 3
TC 4
Z9 4
U1 0
U2 3
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0022-3131
EI 1881-1248
J9 J NUCL SCI TECHNOL
JI J. Nucl. Sci. Technol.
PD MAR
PY 2007
VL 44
IS 3
BP 415
EP 422
DI 10.1080/18811248.2007.9711303
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 165GL
UT WOS:000246292000026
ER

PT J
AU Mcfarlane, HF
AF Mcfarlane, Harold F.
TI Is it time to consider global sharing of integral physics data?
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 9th GLOBAL International Conference 2005
CY OCT 09-13, 2005
CL Tsukuba, JAPAN
DE proliferation; critical; experiment; integral; data; uranium; plutonium;
   sensitivity; analysis
AB The innocent days of the Atoms for Peace program vanished with the suicide attack on the World Trade Center in New York City that occurred while the GLOBAL 2001 international nuclear fuel cycle conference was convened in Paris. Today's reality is that maintaining an inventory of unirradiated highly enriched uranium or plutonium for critical experiments requires a facility to accept substantial security cost and intrusion. In the context of a large collection of benchmark integral experiments collected over several decades and the ongoing rapid advances in computer modeling and simulation, there seems to be ample incentive to reduce both the number of facilities and material inventory quantities worldwide. As a result of ongoing nonproliferation initiatives, there are viable programs that will accept highly enriched uranium for down blending into commercial fuel. Nevertheless, there are formidable hurdles to overcome before national institutions will voluntarily give up existing nuclear research capabilities. GLOBAL 2005 was the appropriate forum to begin fostering a new spirit of cooperation that could lead to improved international security and better use of precious research and development resources, while ensuring access to existing and future critical experiment data.
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Mcfarlane, HF (reprint author), Idaho Natl Lab, POB 1625-3855, Idaho Falls, ID 83415 USA.
EM harold.mcfarlane@inl.gov
NR 9
TC 1
Z9 1
U1 0
U2 1
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0022-3131
EI 1881-1248
J9 J NUCL SCI TECHNOL
JI J. Nucl. Sci. Technol.
PD MAR
PY 2007
VL 44
IS 3
BP 518
EP 521
DI 10.1080/18811248.2007.9711317
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 165GL
UT WOS:000246292000040
ER

PT J
AU Mahajan, D
   Taylor, CE
   Mansoori, GA
AF Mahajan, Devinder
   Taylor, Charles E.
   Mansoori, G. Ali
TI An introduction to natural gas hydrate/clathrate: The major organic
   carbon reserve of the Earth
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Editorial Material
C1 Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA.
   US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
   SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
RP Mahajan, D (reprint author), Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA.
EM dmahajan@bnl.gov; ctaylor@netl.doe.gov; mansoori@uic.edu
NR 25
TC 14
Z9 15
U1 1
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 1
EP 8
DI 10.1016/j.petrol.2006.09.006
PG 8
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300001
ER

PT J
AU Boswell, R
AF Boswell, Ray
TI Resource potential of methane hydrate coming into focus
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE methane hydrate; Department of Energy; Energy Research and Development
ID GAS HYDRATE
AB Over the past decade, the recognition of the potentially vast global occurrence of methane hydrate has raised a number of critical public interest questions. Chief among these is the potential for methane hydrate to serve as a significant new resource to help meet longterm energy demands. To address this and other questions, the Methane Hydrate R&D Act of 2000 was enacted-promoting unprecedented collaboration between six federal agencies and enabling 5 years of government-industry-academia R&D partnerships. This article will discuss significant developments that emerged during the period 2001-2005 that sharpened the focus of R&D into methane hydrate's resource potential, including (1) the improved ability to conduct laboratory studies using samples that more closely replicate in-situ conditions and natural processes; (2) the increased recognition and documentation of the complexity of natural hydrate systems; (3) the increasing ability to directly detect hydrates through remote sensing; (4) the emerging transition from reliance on in-place numbers to more relevant estimates of recoverability; (5) a focus on hydrates within porous and permeable strata, whether in arctic or marine settings, and (6) the emergence of the first validated and publicly-available reservoir simulators. Published by Elsevier B.V.
C1 US DOE, Natl Energy Technol Lab, Morgantown, WV USA.
RP Boswell, R (reprint author), US DOE, Natl Energy Technol Lab, Morgantown, WV USA.
EM Ray.Boswell@netl.doe.gov
OI Boswell, Ray/0000-0002-3824-2967
NR 16
TC 32
Z9 37
U1 0
U2 15
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 9
EP 13
DI 10.1016/j.petrol.2006.09.002
PG 5
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300002
ER

PT J
AU Lai, CCA
AF Lai, Chung-Chieng A.
TI Effects of gas hydrates on the chemical and physical properties of
   seawater
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE methane hydrate; apparent oxygen utilization (AOU); oxidation; ocean
   warming; carbon dioxide; nitrate; concentration
ID METHANE
AB Huge deposits of oceanic methane hydrate (MH) exist on the seafloor on continental margins. MH transforms into water and methane (CH4) gas in bubbles when it dissociates in seawater. That CH4 may be oxidized (via bacteria) into carbon dioxide (C0(2)) before the bubbles rise to the sea surface or dissolve into seawater again. Similarly, nitrogen hydrate is expected to exist in seawater. The nitrogen coming out of nitrogen hydrate can be fixed and oxidized into nitrate. Analysis of the relationship among seawater temperature, '' apparent oxygen utilization '' (AOU) and the concentration Of CO2, based on WOCE ocean observations, reveals some characteristics that are not part of a stoichiometry relation. Analysis of individual profiles implies that the dissociation of gas hydrates occurs according to temperature and pressure (depth) at hydrate phase boundary. A quantity, named as virtual oxygen utilization (VOU), is calculated to account for the depletion of dissolved oxygen in seawater due to biochemical oxidation processes. The results show a good agreement between AOU and VOU at depth greater than the level where hydrates dissociate. The VOU is less than AOU in the layer of seawater beneath the euphotic zone. That is attributed to the escape Of C02 into the atmosphere.. The oceanic MH provides a huge biochemical fuel source to generate heat internal to world oceans. This may explain the observed ocean warming at the intermediate depth during last several decades. The role of microbes in altering the chemical and physical properties of seawater and the course of climate change cannot be ignored. (C) 2006 Elsevier B.V All rights reserved.
C1 Los Alamos Natl Lab, EES 2, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Lai, CCA (reprint author), Los Alamos Natl Lab, EES 2, Div Earth & Environm Sci, MS J577, Los Alamos, NM 87545 USA.
EM CAL@LANL.GOV
NR 11
TC 3
Z9 3
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 47
EP 53
DI 10.1016/j.petrol.2006.03.030
PG 7
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300006
ER

PT J
AU McCallum, SD
   Riestenberg, DE
   Zatsepina, OY
   Phelps, TJ
AF McCallum, Scott D.
   Riestenberg, David E.
   Zatsepina, Olga Y.
   Phelps, Tommy J.
TI Effect of pressure vessel size on the formation of gas hydrates
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE hydrates; clathrates; nucleation; formation kinetics; pressure vessel
ID OCEAN CARBON SEQUESTRATION; METHANE HYDRATE; SEA-FLOOR; DEEP-OCEAN;
   NUCLEATION; WATER; CO2; DISSOCIATION; CO2-HYDRATE; MECHANISM
AB A Seafloor Process Simulator (SPS) has been used for mesoscale experiments investigating the nature of hydrate nucleation and dissociation. The SPS is a 72 L vessel which establishes the pressures and temperatures required for methane and carbon dioxide hydrate stability. This paper describes the experiments that have been performed in the SPS and have been duplicated in the smaller Parr vessel (450 niL). It was found that experiments in the SPS resulted in hydrates consistently forming at lower overpressures and in shorter induction times than equivalent experiments in the Parr vessel. The variability of pressure and/or induction time for hydrate formation was not eliminated by using the SPS, but it appeared to be: less dramatic (small coefficients of variation) when compared with a 450 mL Parr vessel. Based on the experiments performed using the SPS this reduction in overpressure and/or induction time required for the accumulation of hydrates may be attributed to increased bubble surface area, increased gas concentration, increased lifetime of bubbles, increased total volume of the SPS, or a combination of the above. Mesoscale experiments, such as those in the SPS, may perhaps be more representative of hydrate accumulation in the natural environment. Published by Elsevier B.V.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Phelps, TJ (reprint author), Oak Ridge Natl Lab, POB 2008 MS-6036, Oak Ridge, TN 37831 USA.
EM phelpstj@ornl.gov
RI phelps, tommy/A-5244-2011
NR 38
TC 21
Z9 24
U1 2
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 54
EP 64
DI 10.1016/j.petrol.2005.08.004
PG 11
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300007
ER

PT J
AU Gborigi, MO
   Riestenberg, DA
   Lance, MJ
   McCallum, SD
   Atallah, Y
   Tsouris, C
AF Gborigi, Monsuru O.
   Riestenberg, David A.
   Lance, Michael J.
   McCallum, Scott D.
   Atallah, Yousef
   Tsouris, Costas
TI Raman spectroscopy of a hydrated CO2/water composite
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE carbon dioxide sequestration; clathrates; gas hydrates; Raman
   spectroscopy
ID OCEAN CARBON SEQUESTRATION; FOSSIL-FUEL CO2; DEEP-OCEAN; LIQUID CO2;
   SEA-FLOOR; DISSOLUTION; PRESSURE; DIOXIDE; WATER; CO2-HYDRATE
AB Formation of a sinking carbon dioxide (CO2) hydrate composite has been investigated as an alternative to direct liquid CO2 injection and pure CO2 hydrate formation for ocean carbon sequestration. Raman spectroscopy of the CO2 hydrate composite was also performed to determine the presence of various components in the composite produced by the co-injection of liquid CO2 and water. This work is focused on the formation and spectroscopy of a semi-solid sinking CO2 hydrate composite formed using a co-flow injector in 72-liter and 0.45-liter pressurized vessels at pressure and temperature conditions equivalent to approximately 1.3-km depth in the ocean. The Raman wavenumber shifts (triangle cm(-1)) corresponding to CO2 and water molecules as well as shifts in Raman peak positions due to different CO2 phases were obtained. The Raman spectra of the composite showed that both liquid and hydrate phases Of CO2 are present. The dissolution rate Of CO2 hydrate composite in water was also studied. An attempt was made to calculate the hydration number for the CO2 hydrate composite and also the percentage of liquid CO2 and water loss during formation. (C) 2006 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   NE Illinois Univ, Dept Chem, Chicago, IL 60625 USA.
RP Tsouris, C (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM tsourisc@ornl.gov
RI Tsouris, Costas/C-2544-2016; Lance, Michael/I-8417-2016
OI Tsouris, Costas/0000-0002-0522-1027; Lance, Michael/0000-0001-5167-5452
NR 32
TC 6
Z9 6
U1 1
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 65
EP 74
DI 10.1016/j.petrol.2005.09.005
PG 10
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300008
ER

PT J
AU Lekse, J
   Taylor, CE
   Ladner, EP
AF Lekse, Jonathan
   Taylor, Charles E.
   Ladner, Edward P.
TI Effect of bubble size and density on methane conversion to hydrate
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE methane; hydrates; foam; surfactants; bubble; biosurfactants
ID GAS
AB Research is underway at NETL to understand the physical properties of methane hydrates. One area of investigation is the storage of methane as methane hydrates. An economical and efficient means of storing methane in hydrates opens many commercial opportunities such as transport of stranded gas, off-peak storage of line gas, etc. We have observed during our investigations that the ability to convert methane to methane hydrate is enhanced by foaming of the methane-water solution using a surfactant. The density of the foam, along with the bubble size, is important in the conversion of methane to methane hydrate. Published by Elsevier B.V.
C1 US DOE, Natl Energey Technol Lab, Pittsburgh, PA 15236 USA.
RP Taylor, CE (reprint author), US DOE, Natl Energey Technol Lab, POB 10940, Pittsburgh, PA 15236 USA.
EM Charles.taylor@netl.doe.gov
NR 7
TC 6
Z9 6
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 97
EP 100
DI 10.1016/j.petrol.2005.08.007
PG 4
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300012
ER

PT J
AU Eaton, M
   Mahajan, D
   Flood, R
AF Eaton, Michael
   Mahajan, Devinder
   Flood, Roger
TI A novel high-pressure apparatus to study hydrate-sediment interactions
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE methane; methane hydrate; gas hydrate; clathrate; hydrate kinetics; host
   sediments; acoustic properties
AB Hydrates formed from methane and water over thousands of years under both gas-lean (single phase) and gas-ricb (two-phase) conditions are commonly present in marine sediments. Several factors such as dissolved minerals in seawater, mineral content, and pore size of sediments are thought to affect hydrate growth. There is much interest in exploiting this energy source, but there are many unknown aspects that need to be addressed. In order to develop or improve methane recovery methods, it is important to be able to mimic natural conditions in a laboratory and study dynamics of methane hydrates in host sediments. To date, a large data set from laboratory studies is available for pure methane hydrates for which kinetic models have been proposed but reproducible data collection in the presence of sediments has proved challenging. We describe herein a new experimental apparatus named FISH (Flexible Integrated Study of Hydrates) that has been designed to confine artificial and natural sediments in a pressure vessel and mimic oceanic conditions in order to study kinetics of methane hydrate formation/ decomposition in these sediments. The unit: 1) consists of a pressure vessel equipped with a first-of-its-kind viewport that is large enough to observe macroscopic hydrate behavior, 2) configuration allows convenient interchangeability of different volume pressure vessels, 3) can accept acoustic probes, and 4) holds multiple sensors for operation under precise pressure and temperature conditions. The unit set up, operation, and preliminary results for experiments with a pressure vessel in which the effective gas to liquid volume (Vg/NI) ratio was 1.86, are described. The availability of accurate data on the formation/ decomposition cycle and acoustic properties of hydrates will aid in developing a much sought after economical method to extract methane from this vast resource. Published by Elsevier B.V.
C1 Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA.
   SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
   SUNY Stony Brook, Marine Sci Res Ctr, Stony Brook, NY 11794 USA.
RP Mahajan, D (reprint author), Brookhaven Natl Lab, Energy Sci & Technol Dept, Bldg 815, Upton, NY 11973 USA.
EM dmahajan@bnl.gov
NR 9
TC 12
Z9 14
U1 2
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 101
EP 107
DI 10.1016/j.petrol.2005.09.006
PG 7
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300013
ER

PT J
AU Kneafsey, TJ
   Tomutsa, L
   Moridis, GJ
   Seol, Y
   Freifeld, BM
   Taylor, CE
   Gupta, A
AF Kneafsey, Timothy J.
   Tomutsa, Liviu
   Moridis, George J.
   Seol, Yongkoo
   Freifeld, Barry M.
   Taylor, Charles E.
   Gupta, Arvind
TI Methane hydrate formation and dissociation in a partially saturated
   core-scale sand sample
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE hydrate formation; dissociation; porous medium; thermal stimulation;
   depressurization; X-ray computed tomography
ID GAS HYDRATE; DECOMPOSITION; ICE
AB We performed a series of experiments to provide data for validating numerical models of gas hydrate behavior in porous media. Methane hydrate was formed and dissociated under various conditions in a large X-ray transparent pressure vessel, while pressure and temperature were monitored. In addition, X-ray computed tomography (CT) was used to determine local density changes during the experiment. The goals of the experiments were to observe changes occurring due to hydrate formation and dissociation, and to collect data to evaluate the importance of hydrate dissociation kinetic's in porous media. In the series of experiments, we performed thermal perturbations on the sand/water/gas system, formed methane hydrate, performed thermal perturbations on the sand/hydrate/water/gas system resulting in hydrate formation and dissociation, formed hydrate in the resulting partially dissociated system, and dissociated the hydrate by depressurization coupled with thermal stimulation. Our CT work shows significant water migration in addition to possible shifting of mineral grains in response to hydrate formation and dissociation. The extensive data including pressure, temperatures at multiple locations, and density from CT data is described. Published by Elsevier B.V.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
   Colorado Sch Mines, Golden, CO 80401 USA.
RP Kneafsey, TJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM TJKneafsey@lbl.gov
RI Freifeld, Barry/F-3173-2010; Kneafsey, Timothy/H-7412-2014
OI Kneafsey, Timothy/0000-0002-3926-8587
NR 21
TC 99
Z9 107
U1 6
U2 43
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 108
EP 126
DI 10.1016/j.petrol.2006.02.002
PG 19
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300014
ER

PT J
AU Jones, KW
   Feng, H
   Tomov, S
   Winters, WJ
   Prodanovic, M
   Mahajan, D
AF Jones, Keith W.
   Feng, Huan
   Tomov, Stanmire
   Winters, William J.
   Prodanovic, Masa
   Mahajan, Devinder
TI Characterization of methane hydrate host sediments using
   synchrotron-computed microtomography (CMT)
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society (ACS)
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc (ACS), ACS, Div Cellulose & Renewable Mat, Akzo Nobel Function Chem, Arch Wood Protect Inc, Ciba Specialty Chem, Eastman Chem Co, ISK Biocides Inc, Janssen Pharmaceutica, Lonza Inc, Merichem Co, FWRC, Mississippi State Univ, Nisus Corp, Osmose Hold Inc, Pibro Tech Inc, US Borax, Rio Tinto Minerals, Sostram Corp, Viance LLC, Weyerhaeuser Co
DE methane hydrate; guest-host complexes; host sediments; computed
   microtomography (CMT)
ID 2-POINT CORRELATION-FUNCTIONS; PERMEABILITY
AB The hydrate-sediment interaction is an important aspect of gas hydrate studies that needs further examination. We describe here the applicability of the computed microtomography (CMT) technique that utilizes an intense X-ray synchrotron source to characterize sediment samples, two at various depths from the Blake Ridge area (a well-known hydrate-prone region) and one from Georges Bank, that once contained methane trapped as hydrates. Detailed results of the tomographic analysis performed on the deepest sample (667 m) from Blake Ridge are presented as 2-D and 3-D images which show several mineral constituents, the internal grain/pore microstructure, and, following segmentation into pore and grain space, a visualization of the connecting pathways through the pore-space of the sediment. Various parameters obtained from the analysis of the CMT data are presented for all three sediment samples. The micro-scale porosity values showed decreasing trend with increasing depth for all three samples that is consistent with the previously reported bulk porosity data. The 3-D morphology, pore-space pathways, porosity, and permeability values are also reported for all three samples. The application of CMT is now being expanded to the laboratory-formed samples of hydrate in sediments as well as field samples of methane hydrate bearing sediments. Published by Elsevier B.V.
C1 Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA.
   Brookhaven Natl Lab, Lab Earth & Environm Sci, Environm Sci Dept, Upton, NY 11973 USA.
   Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ 07043 USA.
   Brookhaven Natl Lab, Informat Technol Div, Upton, NY 11973 USA.
   US Geol Survey, Woods Hole Sci Ctr, Woods Hole, MA 02543 USA.
   SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA.
   SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA.
RP Mahajan, D (reprint author), Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA.
EM dmahajan@bnl.gov
RI Prodanovic, Masa/I-6810-2015
OI Prodanovic, Masa/0000-0002-1335-1374
NR 34
TC 11
Z9 11
U1 1
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
EI 1873-4715
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 136
EP 145
DI 10.1016/j.petrol.2006.03.029
PG 10
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300016
ER

PT J
AU Tsimpanogiannis, IN
   Lichtner, PC
AF Tsimpanogiannis, Ioannis N.
   Lichtner, Peter C.
TI Parametric study of methane hydrate dissociation in oceanic sediments
   driven by thermal stimulation
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE hydrates; porous media; dissociation; mathematical modeling; oceanic
   sediments
ID NATURAL-GAS PRODUCTION; POROUS-MEDIUM; RESERVOIR; DECOMPOSITION;
   RECOVERY; CONSTANT; ENERGY; MEDIA; MODEL; ROCK
AB We examine methane hydrate dissociation in porous media that is caused by thermal stimulation of the system (e.g. steam or hot water injection). We consider a semi-analytical model of the problem based on local equilibrium and build upon previous studies in order to obtain further insight on the effects of various parameters that can affect methane production. While previous studies have focused on porous media with properties corresponding to permafrost regions, the overall amount of hydrates in oceanic sediments is believed to be significantly high as well. Therefore, it is essential to examine the effect of oceanic sediments on methane production, since pore-size distributions, permeabilities and porosities of oceanic sediments can be significantly different from permafrost sediments. Parameters to be examined include among others: penneability, porosity, and thermodynamic/transport properties of the system. Study of such issues is of significant importance because it can delineate the possible range of parameters where methane production can be economically viable. It is demonstrated in this work, in contrast to previous studies on permafrost, that for the case of oceanic sediments (low permeabilities), the rate of hydrate dissociation depends on the permeability of the porous sediments. It is demonstrated that at low permeabilities corresponding to oceanic sediments extremely high dissociation pressures develop at the hydrate dissociation front that would result in fracturing of the hydrate-sediment and lead to break down of the model. Published by Elsevier B.V.
C1 Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Los Alamos, NM 87545 USA.
RP Tsimpanogiannis, IN (reprint author), Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, MS T003, Los Alamos, NM 87545 USA.
EM tsimpano@usc.edu; lichtner@lanl.gov
NR 56
TC 27
Z9 33
U1 2
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 165
EP 175
DI 10.1016/j.petrol.2005.07.008
PG 11
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300018
ER

PT J
AU Taylor, CE
   Link, DD
   English, N
AF Taylor, Charles E.
   Link, Dirk D.
   English, Niall
TI Methane hydrate research at NETL - Research to make methane production
   from hydrates a reality
SO JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT 229th National Meeting of the American-Chemical-Society
CY MAR 13-17, 2005
CL San Diego, CA
SP Amer Chem Soc
DE methane; hydrates; computational modeling
AB Research is underway at NETL to understand the physical properties of methane hydrates. Five key areas of research that need further investigation have been identified. These five areas, i.e. thermal properties of hydrates in sediments, kinetics of natural hydrate dissociation, hysteresis effects, permeability of sediments to gas flow and capillary pressures within sediments, and hydrate distribution at porous scale, are important to the production models that will be used for producing methane from hydrate deposits. NETL is using both laboratory experiments and computational modeling to address these five key areas. The laboratory and computational research reinforce each other by providing feedback. The laboratory results are used in the computational models and the results from the computational modeling is used to help direct future laboratory research. The data generated at NETL will be used to help fulfill The National Methane Hydrate R&D Program of a '' long-term supply of natural gas by developing the knowledge and technology base to allow commercial production of methane from domestic hydrate deposits by the year 2015 '' as outlined on the NETL Website [NETL Website, 2005. http://www.netl.doe.gov/sengo/Natural%20Gas/hydrates/index.html.]. Laboratory research is accomplished in one of the numerous high-pressure hydrate cells available ranging in size from 0.15 mL to 15 L in volume. A dedicated high-pressure view cell within the Raman spectrometer allows for monitoring the formation and dissociation of hydrates. Thermal conductivity of hydrates (synthetic and natural) at a certain temperature and pressure is performed in a NETL-designed cell. Computational modeling studies are investigating the kinetics of hydrate formation and dissociation, modeling methane hydrate reservoirs, molecular dynamics simulations of hydrate formation, dissociation, and thermal properties, and Monte Carlo simulations of hydrate formation and dissociation. Published by Elsevier B.V.
C1 US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Taylor, CE (reprint author), US DOE, Natl Energy Technol Lab, POB 10940, Pittsburgh, PA 15236 USA.
EM ctaylor@netl.doe.gov
NR 4
TC 6
Z9 6
U1 1
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-4105
J9 J PETROL SCI ENG
JI J. Pet. Sci. Eng.
PD MAR
PY 2007
VL 56
IS 1-3
BP 186
EP 191
DI 10.1016/j.petrol.2005.08.006
PG 6
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA 164MX
UT WOS:000246239300020
ER

PT J
AU Klaning, U
   Byberg, JR
   Daasbjerg, K
   Sehested, K
   Appelman, EH
AF Klaning, Ulrik
   Byberg, Jorgen R.
   Daasbjerg, Kim
   Sehested, Knud
   Appelman, Evan H.
TI Electron transfer reactions of peroxydisulfate and fluoroxysulfate
   reactions with the cyanide complexes M(CN)(n)(4-) (M=Fe(II), Ru(II),
   Os(II), Mo(IV), and W(IV))
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID AQUEOUS-SOLUTION; DISSOCIATION-ENERGIES; BIOCHEMICAL PATHWAYS;
   FERROCYANIDE IONS; KINETICS; OXIDATION; REDUCTION; DECOMPOSITION;
   MECHANISM; OCTACYANOMOLYBDATE(IV)
AB The stoichiometry and the kinetics of oxidation of the cyanide complexes M(CN)(n)(4-) (M = Fe(II), Ru(II), Os(II), Mo(IV), and W(IV)) by the peroxydisulfate ion, S2O82-, and by the much more strongly oxidizing fluoroxysulfate ion, SO4F-, were studied in aqueous solutions containing Li+. Reactions of S2O82- with M(CN)(n)(4-) are known to be strongly catalyzed by Li+ and other alkali metal ions, and this applies also to the corresponding reactions of SO4F-. The primary reactions of S2O82- and SO4F- have both been found to be one-electron processes in which the equally strong O-O and O-F bonds are broken. The primary reaction of S2O82- consists of a single step yielding M(CN)(n)(3-), SO4-, and SO42-, whereas the primary reaction of SO4F- comprises two parallel one-electron steps, one leading to M(CN)(n)(3-), SO4-, and F- and the other yielding M(CN)(n-1)(2-,) CN-, SO4- and F-. The relationship between the rate constants and the standard free energies of reaction for the Li+-catalyzed reactions of SO4F- and S2O82- with M(CN)(n)(4-), and for the uncatalyzed reactions of S2O82- with bipyridyl and phenanthroline complexes MLn2+ (M = Fe(II), Ru(II), and Os(II)) studied previously, suggests that the intrinsic barrier for all three sets of reactions is similar, i.e., unaffected by the Li+ catalysis, and that the electron transfer and the breakage of the O-O and O-F bonds are concerted processes.
C1 Univ Aarhus, Dept Chem, DK-8000 Aarhus C, Denmark.
   Riso Natl Lab, DK-4000 Roskilde, Denmark.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Klaning, U (reprint author), Mollegaarden,Obstrupvej 12 M, DK-8320 Marslet, Denmark.
NR 52
TC 2
Z9 2
U1 2
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD MAR 1
PY 2007
VL 111
IS 8
BP 1419
EP 1425
DI 10.1021/jp0654157
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 138FI
UT WOS:000244348100005
PM 17274603
ER

PT J
AU Gibbs, GV
   Cox, DF
   Rosso, KM
   Ross, NL
   Downs, RT
   Spackman, MA
AF Gibbs, G. V.
   Cox, D. F.
   Rosso, K. M.
   Ross, N. L.
   Downs, R. T.
   Spackman, M. A.
TI Theoretical electron density distributions for Fe- and Cu-sulfide earth
   materials: A connection between bond length, bond critical point
   properties, local energy densities, and bonded interactions
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID TRANSITION-METAL SULFIDES; RAY CHARGE-DENSITY; CRYSTAL-CHEMISTRY;
   IRON-SULFIDE; MAGNETIC-PROPERTIES; HIGH-PRESSURE; PYRITE; MOSSBAUER;
   CUBANITE; CUFE2S3
AB Bond critical point and local energy density properties together with net atomic charges were calculated for theoretical electron density distributions, rho(r), generated for a variety of Fe and Cu metal-sulfide materials with high- and low-spin Fe atoms in octahedral coordination and high-spin Fe atoms in tetrahedral coordination. The electron density, rho(r(c)), the Laplacian, del(2)rho(r(c)), the local kinetic energy, G(r(c)), and the oxidation state of Fe increase as the local potential energy density, V(r>(c)), the Fe-S bond lengths, and the coordination numbers of the Fe atoms decrease. The properties of the bonded interactions for the octahedrally coordinated low-spin Fe atoms for pyrite and marcasite are distinct from those for high-spin Fe atoms for troilite, smythite, and greigite. The Fe-S bond lengths are shorter and the values of rho(r(c)) and del(2)rho(r(c)) are larger for pyrite and marcasite, indicating that the accumulation and local concentration of rho(r) in the internuclear region are greater than those involving the longer, high-spin Fe-S bonded interactions. The net atomic charges and the bonded radii calculated for the Fe and S atoms in pyrite and marcasite are also smaller than those for sulfides with high-spin octahedrally coordinated Fe atoms. Collectively, the Fe-S interactions are indicated to be intermediate in character with the low-spin Fe-S interactions having greater shared character than the high-spin interactions. The bond lengths observed for chalcopyrite together with the calculated bond critical point properties are consistent with the formula Cu+Fe3+S2. The bond length is shorter and the rho(r(c)) value is larger for the FeS4 tetrahedron displayed by metastable greigite than those displayed by chalcopyrite and cubanite, consistent with a proposal that the Fe atom in greigite is tetravalent. S-S bond paths exist between each of the surface S atoms of adjacent slabs of FeS6 octahedra comprising the layer sulfide smythite, suggesting that the neutral Fe3S4 slabs are linked together and stabilized by the pathways of electron density comprising S-S bonded interactions. Such interactions not only exist between the S atoms for adjacent S-8 rings in native sulfur, but their bond critical point properties are similar to those displayed by the metal sulfides.
C1 Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA.
   Virginia Tech, Dept Chem Engn, Blacksburg, VA 24061 USA.
   Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
   Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA.
   Univ Western Australia, Sch Biomed Biomol & Chem Sci, Nedlands, WA 6009, Australia.
RP Gibbs, GV (reprint author), Virginia Tech, Dept Geosci, Blacksburg, VA 24061 USA.
EM gvgibbs@vt.edu
RI Spackman, Mark/D-1197-2010
OI Spackman, Mark/0000-0003-1521-2041
NR 68
TC 20
Z9 20
U1 3
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD MAR 1
PY 2007
VL 111
IS 8
BP 1923
EP 1931
DI 10.1021/jp065086i
PG 9
WC Chemistry, Physical
SC Chemistry
GA 138FM
UT WOS:000244348500004
PM 17274642
ER

PT J
AU Li, J
   Kathmann, SM
   Schenter, GK
   Gutowski, M
AF Li, Jun
   Kathmann, Shawn M.
   Schenter, Gregory K.
   Gutowski, Maciej
TI Isomers and conformers of H(NH2BH2)(n)H oligomers: Understanding the
   geometries and electronic structure of boron-nitrogen-hydrogen compounds
   as potential hydrogen storage materials
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID GENERALIZED GRADIENT APPROXIMATION; N-H COMPOUNDS;
   THERMAL-DECOMPOSITION; AB-INITIO; MICROWAVE-SPECTRUM; BH3NH3; BOND;
   POLYAMINOBORANE; ENERGIES; EXCHANGE
AB Boron-nitrogen-hydrogen (BNHx) materials are polar analogues of hydrocarbons with potential applications as media for hydrogen storage. As H(NH2BH2)),H oligomers result from dehydrogenation of NH3BH3 and NH4BH4 materials, understanding the geometries, stabilities, and electronic structure of these oligomers is essential for developing chemical methods of hydrogen release and regeneration of the BNRx-based hydrogen storage materials. In this work we have performed computational modeling on the H(NH2BH2)(n)H (n = 1-6) oligomers using density functional theory (DFT). We have investigated linear chain structures and the stabilizing effects of coiling, biradicalization, and branching through Car-Parrinello molecular dynamics simulations and subsequent geometry optimizations. We find that the zigzag linear oligomers are unstable with respect to the coiled, square-wave chain, and branched structures, with the coiled structures being the most stable. Dilrydrogen bonding in oligomers, where protic H delta+(N) hydrogens interact with hydridic H delta-(B) hydrogens, plays a crucial role in stabilizing different isomers and conformers. The results are consistent with structures of products that are seen in experimental NMR studies of dehydrogenated ammonia borane.
C1 Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
   Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
   Heriot Watt Univ, Chem Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland.
   Univ Gdansk, Dept Chem, PL-80952 Gdansk, Poland.
RP Li, J (reprint author), Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
EM jun.li@pnl.gov; m.gutowski@hw.ac.uk
RI Li, Jun/E-5334-2011; Schenter, Gregory/I-7655-2014
OI Li, Jun/0000-0002-8456-3980; Schenter, Gregory/0000-0001-5444-5484
NR 34
TC 35
Z9 35
U1 0
U2 18
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD MAR 1
PY 2007
VL 111
IS 8
BP 3294
EP 3299
DI 10.1021/jp066360b
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 147MA
UT WOS:000245005900015
ER

PT J
AU Qian, Q
   Tyson, TA
   Deleon, M
   Kao, CC
   Bai, J
   Frenkel, AI
AF Qian, Q.
   Tyson, T. A.
   Deleon, M.
   Kao, C. -C.
   Bai, J.
   Frenkel, A. I.
TI Influence of strain on the atomic and electronic structure of manganite
   films
SO JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
LA English
DT Article
DE XRD
ID LOW-FIELD MAGNETORESISTANCE; THIN-FILMS; MAGNETIC-ANISOTROPY;
   TRANSITION; SPECTROSCOPY; DEPENDENCE; CHARGE; LAMNO3; ORDER; MN
AB A study of the long-range, local and electronic structure of Nd0.5Sr0.5MnO3 films of varying thickness between 500 and 2000 angstrom has been performed. Local structure measurements at the Sr K-edge reveal a reduction of the Mn-O-Mn bond angles in films below 1000 angstrom. Spin-polarized measurements reveal splitting of the Mn 3d e(g) state in the strained region of the films and are consistent with a two-layer model for thick films with a relaxed undistorted layer on top of a strained structurally distorted layer near the substrate. (c) 2007 Elsevier Ltd. All rights reserved.
C1 New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Yeshiva Univ, Dept Phys, New York, NY 10016 USA.
RP Tyson, TA (reprint author), New Jersey Inst Technol, Dept Phys, Newark, NJ 07102 USA.
EM qqian@njit.edu; tyson@adm.njit.edu
RI Frenkel, Anatoly/D-3311-2011; Bai, Jianming/O-5005-2015
OI Frenkel, Anatoly/0000-0002-5451-1207; 
NR 28
TC 4
Z9 4
U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-3697
J9 J PHYS CHEM SOLIDS
JI J. Phys. Chem. Solids
PD MAR
PY 2007
VL 68
IS 3
BP 458
EP 463
DI 10.1016/j.jpcs.2006.12.024
PG 6
WC Chemistry, Multidisciplinary; Physics, Condensed Matter
SC Chemistry; Physics
GA 149QX
UT WOS:000245162800021
ER

PT J
AU Fachini, P
   Longacre, RS
   Xu, Z
   Zhang, H
AF Fachini, P.
   Longacre, R. S.
   Xu, Z.
   Zhang, H.
TI Indication for pi(+)pi(-) scattering in p+p collisions at root s(NN)=200
   GeV
SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
LA English
DT Article
ID HEAVY-ION COLLISIONS; INCLUSIVE PRODUCTION; PARTICLE-PRODUCTION; NUCLEAR
   COLLISIONS; MESON PRODUCTION; DECAYS; RESONANCES; SYMMETRY; MATTER; Z0
AB A rho(770)(0) mass shift of about -40 MeV/c(2) was measured in p + p collisions at root s(NN) = 200 GeV at RHIC. Previous mass shifts have been observed at CERN-LEBC-EHS and CERN-LEP. We will show that phase space does not account for the rho(770)(0) mass shift measured at RHIC, CERN-LEBC-EHS and CERN-LEP and conclude that there are significant scattering interactions in p + p collisions.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Fachini, P (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 31
TC 3
Z9 3
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0954-3899
EI 1361-6471
J9 J PHYS G NUCL PARTIC
JI J. Phys. G-Nucl. Part. Phys.
PD MAR
PY 2007
VL 34
IS 3
BP 431
EP 439
DI 10.1088/0954-3899/34/3/002
PG 9
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 138NS
UT WOS:000244370000003
ER

PT J
AU Adams, J
   Aggarwal, MM
   Ahammed, Z
   Amonett, J
   Anderson, BD
   Anderson, M
   Arkhipkin, D
   Averichev, GS
   Bai, Y
   Balewski, J
   Barannikova, O
   Barnby, LS
   Baudot, J
   Bekele, S
   Belaga, VV
   Bellingeri-Laurikainen, A
   Bellwied, R
   Bezverkhny, BI
   Bhardwaj, S
   Bhasin, A
   Bhati, AK
   Bichsel, H
   Bielcik, J
   Bielcikova, J
   Bland, LC
   Blyth, CO
   Blyth, SL
   Bonner, BE
   Botje, M
   Bouchet, J
   Brandin, AV
   Bravar, A
   Bystersky, M
   Cadman, RV
   Cai, XZ
   Caines, H
   Sanchez, MCD
   Castillo, J
   Catu, O
   Cebra, D
   Chajecki, Z
   Chaloupka, P
   Chattopadhyay, S
   Chen, HF
   Chen, JH
   Chen, Y
   Cheng, J
   Cherney, M
   Chikanian, A
   Choi, HA
   Christie, W
   Coffin, JP
   Cosentino, MR
   Cramer, JG
   Crawford, HJ
   Das, D
   Das, S
   Daugherity, M
   de Moura, MM
   Dedovich, TG
   DePhillips, M
   Derevschikov, AA
   Didenko, L
   Dietel, T
   Djawotho, P
   Dogra, SM
   Dong, WJ
   Dong, X
   Draper, JE
   Du, F
   Dunin, VB
   Dunlop, JC
   Mazumdar, MRD
   Eckardt, V
   Edwards, WR
   Efimov, LG
   Emelianov, V
   Engelage, J
   Eppley, G
   Erazmus, B
   Estienne, M
   Fachini, P
   Fatemi, R
   Fedorisin, J
   Filimonov, K
   Filip, P
   Finch, E
   Fine, V
   Fisyak, Y
   Fu, J
   Gagliardi, CA
   Gaillard, L
   Gans, J
   Ganti, MS
   Ghazikhanian, V
   Ghosh, P
   Gonzalez, JE
   Gorbunov, YG
   Gos, H
   Grebenyuk, O
   Grosnick, D
   Guertin, SM
   Guimaraes, KSFF
   Guo, Y
   Gupta, N
   D Gutierrez, T
   Haag, B
   Hallman, TJ
   Hamed, A
   Harris, JW
   He, W
   Heinz, M
   Henry, TW
   Hepplemann, S
   Hippolyte, B
   Hirsch, A
   Hjort, E
   Hoffmann, GW
   Horner, MJ
   Huang, HZ
   Huang, SL
   Hughes, EW
   Humanic, TJ
   Igo, G
   Jacobs, P
   Jacobs, WW
   Jakl, P
   Jia, F
   Jiang, H
   Jones, PG
   Judd, EG
   Kabana, S
   Kang, K
   Kapitan, J
   Kaplan, M
   Keane, D
   Kechechyan, A
   Khodyrev, VY
   Kim, BC
   Kiryluk, J
   Kisiel, A
   Kislov, EM
   Koetke, DD
   Kollegger, T
   Kopytine, M
   Kotchenda, L
   Kouchpil, V
   Kowalik, KL
   Kramer, M
   Kravtsov, P
   Kravtsov, VI
   Krueger, K
   Kuhn, C
   Kulikov, AI
   Kumar, A
   Kuznetsov, AA
   Lamont, MAC
   Landgraf, JM
   Lange, S
   LaPointe, S
   Laue, F
   Lauret, J
   Lebedev, A
   Lednicky, R
   Lee, CH
   Lehocka, S
   LeVine, MJ
   Li, C
   Li, Q
   Li, Y
   Lin, G
   Lindenbaum, SJ
   Lisa, MA
   Liu, F
   Liu, H
   Liu, J
   Liu, L
   Liu, Z
   Ljubicic, T
   Llope, WJ
   Long, H
   Longacre, RS
   Lopez-Noriega, M
   Love, WA
   Lu, Y
   Ludlam, T
   Lynn, D
   Ma, GL
   Ma, JG
   Ma, YG
   Magestro, D
   Mahapatra, DP
   Majka, R
   Mangotra, LK
   Manweiler, R
   Margetis, S
   Markert, C
   Martin, L
   Matis, HS
   Matulenko, YA
   McClain, CJ
   McShane, TS
   Melnick, Y
   Meschanin, A
   Miller, ML
   Minaev, NG
   Mioduszewski, S
   Mironov, C
   Mischke, A
   Mishra, DK
   Mitchell, J
   Mohanty, B
   Molnar, L
   Moore, CF
   Morozov, DA
   Munhoz, MG
   Nandi, BK
   Nattrass, C
   Nayak, TK
   Nelson, JM
   Netrakanti, PK
   Nikitin, VA
   Nogach, LV
   Nurushev, SB
   Odyniec, G
   Ogawa, A
   Okorokov, V
   Oldenburg, M
   Olson, D
   Pachr, M
   Pal, SK
   Panebratsev, Y
   Panitkin, SY
   Pavlinov, AI
   Pawlak, T
   Peitzmann, T
   Perevoztchikov, V
   Perkins, C
   Peryt, W
   Petrov, VA
   Phatak, SC
   Picha, R
   Planinic, M
   Pluta, J
   Poljak, N
   Porile, N
   Porter, J
   Potekhin, M
   Potrebenikova, E
   Potukuchi, BVKS
   Prindle, D
   Putschke, J
   Rakness, G
   Raniwala, R
   Raniwala, S
   Ray, RL
   Razin, SV
   Reinnarth, J
   Relyea, D
   Retiere, F
   Ridiger, A
   Ritter, HG
   Roberts, JB
   Rogachevskiy, OV
   Romero, JL
   Rose, A
   Roy, C
   Ruan, L
   Russcher, MJ
   Sahoo, R
   Sakrejda, I
   Salur, S
   Sandweiss, J
   Sarsour, M
   Sazhin, PS
   Schambach, J
   Scharenberg, RP
   Schmitz, N
   Schweda, K
   Seger, J
   Selyuzhenkov, I
   Seyboth, P
   Shabetai, A
   Shahaliev, E
   Shao, M
   Sharma, M
   Shen, WQ
   Shimanskiy, SS
   Sichtermann, E
   Simon, F
   Singaraju, RN
   Smirnov, N
   Snellings, R
   Sood, G
   Sorensen, P
   Sowinski, J
   Speltz, J
   Spinka, HM
   Srivastava, B
   Stadnik, A
   Stanislaus, TDS
   Stock, R
   Stolpovsky, A
   Strikhanov, M
   Stringfellow, B
   Suaide, AAP
   Sugarbaker, E
   Sumbera, M
   Sun, Z
   Surrow, B
   Swanger, M
   Symons, TJM
   de Toledo, AS
   Tai, A
   Takahashi, J
   Tang, AH
   Tarnowsky, T
   Thein, D
   Thomas, JH
   Timmins, AR
   Timoshenko, S
   Tokarev, M
   Trainor, TA
   Trentalange, S
   Tribble, RE
   D Tsai, O
   Ulery, J
   Ullrich, T
   Underwood, DG
   Van Buren, G
   van der Kolk, N
   van Leeuwen, M
   Varma, R
   Vasilevski, IM
   Vasiliev, AN
   Vernet, R
   Vigdor, SE
   Viyogi, YP
   Vokal, S
   Waggoner, WT
   Wang, F
   Wang, G
   Wang, JS
   Wang, XL
   Wang, Y
   Watson, JW
   Webb, JC
   Westfall, GD
   Wetzler, A
   Whitten, C
   Wieman, H
   Wissink, SW
   Witt, R
   Wood, J
   Wu, J
   Xu, N
   Xu, QH
   Xu, Z
   Yepes, P
   Yoo, IK
   Yurevich, VI
   Zhan, W
   Zhang, H
   Zhang, WM
   Zhang, Y
   Zhang, ZP
   Zhao, Y
   Zhong, C
   Zoulkarneev, R
   Zoulkarneeva, Y
   Zubarev, AN
   Zuo, JX
AF Adams, J.
   Aggarwal, M. M.
   Ahammed, Z.
   Amonett, J.
   Anderson, B. D.
   Anderson, M.
   Arkhipkin, D.
   Averichev, G. S.
   Bai, Y.
   Balewski, J.
   Barannikova, O.
   Barnby, L. S.
   Baudot, J.
   Bekele, S.
   Belaga, V. V.
   Bellingeri-Laurikainen, A.
   Bellwied, R.
   Bezverkhny, B. I.
   Bhardwaj, S.
   Bhasin, A.
   Bhati, A. K.
   Bichsel, H.
   Bielcik, J.
   Bielcikova, J.
   Bland, L. C.
   Blyth, C. O.
   Blyth, S-L
   Bonner, B. E.
   Botje, M.
   Bouchet, J.
   Brandin, A. V.
   Bravar, A.
   Bystersky, M.
   Cadman, R. V.
   Cai, X. Z.
   Caines, H.
   Calderon de la Barca Sanchez, M.
   Castillo, J.
   Catu, O.
   Cebra, D.
   Chajecki, Z.
   Chaloupka, P.
   Chattopadhyay, S.
   Chen, H. F.
   Chen, J. H.
   Chen, Y.
   Cheng, J.
   Cherney, M.
   Chikanian, A.
   Choi, H. A.
   Christie, W.
   Coffin, J. P.
   Cosentino, M. R.
   Cramer, J. G.
   Crawford, H. J.
   Das, D.
   Das, S.
   Daugherity, M.
   de Moura, M. M.
   Dedovich, T. G.
   DePhillips, M.
   Derevschikov, A. A.
   Didenko, L.
   Dietel, T.
   Djawotho, P.
   Dogra, S. M.
   Dong, W. J.
   Dong, X.
   Draper, J. E.
   Du, F.
   Dunin, V. B.
   Dunlop, J. C.
   Mazumdar, M. R. Dutta
   Eckardt, V.
   Edwards, W. R.
   Efimov, L. G.
   Emelianov, V.
   Engelage, J.
   Eppley, G.
   Erazmus, B.
   Estienne, M.
   Fachini, P.
   Fatemi, R.
   Fedorisin, J.
   Filimonov, K.
   Filip, P.
   Finch, E.
   Fine, V.
   Fisyak, Y.
   Fu, J.
   Gagliardi, C. A.
   Gaillard, L.
   Gans, J.
   Ganti, M. S.
   Ghazikhanian, V.
   Ghosh, P.
   Gonzalez, J. E.
   Gorbunov, Y. G.
   Gos, H.
   Grebenyuk, O.
   Grosnick, D.
   Guertin, S. M.
   Guimaraes, K. S. F. F.
   Guo, Y.
   Gupta, N.
   D Gutierrez, T.
   Haag, B.
   Hallman, T. J.
   Hamed, A.
   Harris, J. W.
   He, W.
   Heinz, M.
   Henry, T. W.
   Hepplemann, S.
   Hippolyte, B.
   Hirsch, A.
   Hjort, E.
   Hoffmann, G. W.
   Horner, M. J.
   Huang, H. Z.
   Huang, S. L.
   Hughes, E. W.
   Humanic, T. J.
   Igo, G.
   Jacobs, P.
   Jacobs, W. W.
   Jakl, P.
   Jia, F.
   Jiang, H.
   Jones, P. G.
   Judd, E. G.
   Kabana, S.
   Kang, K.
   Kapitan, J.
   Kaplan, M.
   Keane, D.
   Kechechyan, A.
   Khodyrev, V. Yu
   Kim, B. C.
   Kiryluk, J.
   Kisiel, A.
   Kislov, E. M.
   Koetke, D. D.
   Kollegger, T.
   Kopytine, M.
   Kotchenda, L.
   Kouchpil, V.
   Kowalik, K. L.
   Kramer, M.
   Kravtsov, P.
   Kravtsov, V. I.
   Krueger, K.
   Kuhn, C.
   Kulikov, A. I.
   Kumar, A.
   Kuznetsov, A. A.
   Lamont, M. A. C.
   Landgraf, J. M.
   Lange, S.
   LaPointe, S.
   Laue, F.
   Lauret, J.
   Lebedev, A.
   Lednicky, R.
   Lee, C-H
   Lehocka, S.
   LeVine, M. J.
   Li, C.
   Li, Q.
   Li, Y.
   Lin, G.
   Lindenbaum, S. J.
   Lisa, M. A.
   Liu, F.
   Liu, H.
   Liu, J.
   Liu, L.
   Liu, Z.
   Ljubicic, T.
   Llope, W. J.
   Long, H.
   Longacre, R. S.
   Lopez-Noriega, M.
   Love, W. A.
   Lu, Y.
   Ludlam, T.
   Lynn, D.
   Ma, G. L.
   Ma, J. G.
   Ma, Y. G.
   Magestro, D.
   Mahapatra, D. P.
   Majka, R.
   Mangotra, L. K.
   Manweiler, R.
   Margetis, S.
   Markert, C.
   Martin, L.
   Matis, H. S.
   Matulenko, Yu A.
   McClain, C. J.
   McShane, T. S.
   Melnick, Yu
   Meschanin, A.
   Miller, M. L.
   Minaev, N. G.
   Mioduszewski, S.
   Mironov, C.
   Mischke, A.
   Mishra, D. K.
   Mitchell, J.
   Mohanty, B.
   Molnar, L.
   Moore, C. F.
   Morozov, D. A.
   Munhoz, M. G.
   Nandi, B. K.
   Nattrass, C.
   Nayak, T. K.
   Nelson, J. M.
   Netrakanti, P. K.
   Nikitin, V. A.
   Nogach, L. V.
   Nurushev, S. B.
   Odyniec, G.
   Ogawa, A.
   Okorokov, V.
   Oldenburg, M.
   Olson, D.
   Pachr, M.
   Pal, S. K.
   Panebratsev, Y.
   Panitkin, S. Y.
   Pavlinov, A. I.
   Pawlak, T.
   Peitzmann, T.
   Perevoztchikov, V.
   Perkins, C.
   Peryt, W.
   Petrov, V. A.
   Phatak, S. C.
   Picha, R.
   Planinic, M.
   Pluta, J.
   Poljak, N.
   Porile, N.
   Porter, J.
   Potekhin, M.
   Potrebenikova, E.
   Potukuchi, B. V. K. S.
   Prindle, D.
   Putschke, J.
   Rakness, G.
   Raniwala, R.
   Raniwala, S.
   Ray, R. L.
   Razin, S. V.
   Reinnarth, J.
   Relyea, D.
   Retiere, F.
   Ridiger, A.
   Ritter, H. G.
   Roberts, J. B.
   Rogachevskiy, O. V.
   Romero, J. L.
   Rose, A.
   Roy, C.
   Ruan, L.
   Russcher, M. J.
   Sahoo, R.
   Sakrejda, I.
   Salur, S.
   Sandweiss, J.
   Sarsour, M.
   Sazhin, P. S.
   Schambach, J.
   Scharenberg, R. P.
   Schmitz, N.
   Schweda, K.
   Seger, J.
   Selyuzhenkov, I.
   Seyboth, P.
   Shabetai, A.
   Shahaliev, E.
   Shao, M.
   Sharma, M.
   Shen, W. Q.
   Shimanskiy, S. S.
   Sichtermann, E.
   Simon, F.
   Singaraju, R. N.
   Smirnov, N.
   Snellings, R.
   Sood, G.
   Sorensen, P.
   Sowinski, J.
   Speltz, J.
   Spinka, H. M.
   Srivastava, B.
   Stadnik, A.
   Stanislaus, T. D. S.
   Stock, R.
   Stolpovsky, A.
   Strikhanov, M.
   Stringfellow, B.
   Suaide, A. A. P.
   Sugarbaker, E.
   Sumbera, M.
   Sun, Z.
   Surrow, B.
   Swanger, M.
   Symons, T. J. M.
   Szanto de Toledo, A.
   Tai, A.
   Takahashi, J.
   Tang, A. H.
   Tarnowsky, T.
   Thein, D.
   Thomas, J. H.
   Timmins, A. R.
   Timoshenko, S.
   Tokarev, M.
   Trainor, T. A.
   Trentalange, S.
   Tribble, R. E.
   D Tsai, O.
   Ulery, J.
   Ullrich, T.
   Underwood, D. G.
   Van Buren, G.
   van der Kolk, N.
   van Leeuwen, M.
   Varma, R.
   Vasilevski, I. M.
   Vasiliev, A. N.
   Vernet, R.
   Vigdor, S. E.
   Viyogi, Y. P.
   Vokal, S.
   Waggoner, W. T.
   Wang, F.
   Wang, G.
   Wang, J. S.
   Wang, X. L.
   Wang, Y.
   Watson, J. W.
   Webb, J. C.
   Westfall, G. D.
   Wetzler, A.
   Whitten J, C.
   Wieman, H.
   Wissink, S. W.
   Witt, R.
   Wood, J.
   Wu, J.
   Xu, N.
   Xu, Q. H.
   Xu, Z.
   Yepes, P.
   Yoo, I-K
   Yurevich, V. I.
   Zhan, W.
   Zhang, H.
   Zhang, W. M.
   Zhang, Y.
   Zhang, Z. P.
   Zhao, Y.
   Zhong, C.
   Zoulkarneev, R.
   Zoulkarneeva, Y.
   Zubarev, A. N.
   Zuo, J. X.
CA STAR Collaboration
TI The energy dependence of p(t) angular correlations inferred from
   mean-p(t) fluctuation scale dependence in heavy ion collisions at the
   SPS and RHIC
SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
LA English
DT Article
ID AU-AU COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; BY-EVENT FLUCTUATIONS;
   TRANSVERSE-MOMENTUM; ROOT-S(NN)=200 GEV; EQUILIBRATION;
   AUTOCORRELATIONS; PHI; ETA
AB We present the first study of the energy dependence of pt angular correlations inferred from event-wisemean transversemomentum < p(t)> fluctuations in heavy ion collisions. We compare our large-acceptance measurements at CM energies root s(NN) = 19.6, 62.4, 130 and 200 GeV to SPS measurements at 12.3 and 17.3 GeV. p(t) angular correlation structure suggests that the principal source of pt correlations and fluctuations is minijets (minimum-bias parton fragments). We observe a dramatic increase in correlations and fluctuations from SPS to RHIC energies, increasing linearly with 1n root s(NN) from the onset of observable jet-related < p(t)> fluctuations near 10 GeV.
C1 Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
   Panjab Univ, Chandigarh 160014, India.
   Variable Energy Cyclotron Ctr, Kolkata 7000064, W Bengal, India.
   Kent State Univ, Kent, OH 44242 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Joint Inst Nucl Res Dubna, Particle Phys Lab, Dubna, Russia.
   Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia.
   Univ Utrecht, NL-3508 TC Utrecht, Netherlands.
   NIKHEF H, NL-1009 DB Amsterdam, Netherlands.
   Indiana Univ, Bloomington, IN 47408 USA.
   Purdue Univ, W Lafayette, IN 47907 USA.
   Inst Rech Subatom, Strasbourg, France.
   Ohio State Univ, Columbus, OH 43210 USA.
   SUBATECH, Nantes, France.
   Wayne State Univ, Detroit, MI 48201 USA.
   Yale Univ, New Haven, CT 06520 USA.
   Univ Rajasthan, Jaipur 302004, Rajasthan, India.
   Univ Jammu, Jammu 180001, India.
   Univ Washington, Seattle, WA 98195 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Rice Univ, Houston, TX 77251 USA.
   Moscow Phys Engn Inst, Moscow, Russia.
   AS CR, Nucl Phys Inst, Rez 25068, Czech Republic.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
   Univ Sci & Technol, Hefei 230026, Peoples R China.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   Tsinghua Univ, Beijing 100084, Peoples R China.
   Creighton Univ, Omaha, NE 68178 USA.
   Pusan Natl Univ, Pusan 609735, South Korea.
   Univ Sao Paulo, BR-01051 Sao Paulo, Brazil.
   Univ Calif Berkeley, Berkeley, CA 94720 USA.
   Univ Texas, Austin, TX 78712 USA.
   Inst High Energy Phys, Protvino, Russia.
   Goethe Univ Frankfurt, D-6000 Frankfurt, Germany.
   Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
   MIT, Cambridge, MA 02139 USA.
   HZNU, CCNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
   Texas A&M Univ, College Stn, TX 77843 USA.
   Warsaw Univ Technol, PL-00661 Warsaw, Poland.
   Valparaiso Univ, Valparaiso, IN 46383 USA.
   Penn State Univ, University Pk, PA 16802 USA.
   CALTECH, Pasadena, CA 91125 USA.
   Inst Modern Phys, Lanzhou, Peoples R China.
   Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   CUNY City Coll, New York, NY 10031 USA.
   Inst Phys, Bhubaneswar 751005, Orissa, India.
   Indian Inst Technol, Bombay, Maharashtra, India.
   Univ Zagreb, HR-10002 Zagreb, Croatia.
   Michigan State Univ, E Lansing, MI 48824 USA.
RP Adams, J (reprint author), Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
RI Chaloupka, Petr/E-5965-2012; Nattrass, Christine/J-6752-2016; Cosentino,
   Mauro/L-2418-2014; Suaide, Alexandre/L-6239-2016; van der Kolk,
   Naomi/M-9423-2016; Inst. of Physics, Gleb Wataghin/A-9780-2017;
   Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013; Barnby,
   Lee/G-2135-2010; Strikhanov, Mikhail/P-7393-2014; Dogra, Sunil
   /B-5330-2013; Fornazier Guimaraes, Karin Silvia/H-4587-2016; Mischke,
   Andre/D-3614-2011; Takahashi, Jun/B-2946-2012; Planinic,
   Mirko/E-8085-2012; Chen, Yu/E-3788-2012; Peitzmann, Thomas/K-2206-2012;
   Witt, Richard/H-3560-2012; Castillo Castellanos, Javier/G-8915-2013;
   Lednicky, Richard/K-4164-2013; Sumbera, Michal/O-7497-2014; 
OI Nattrass, Christine/0000-0002-8768-6468; Cosentino,
   Mauro/0000-0002-7880-8611; Suaide, Alexandre/0000-0003-2847-6556; van
   der Kolk, Naomi/0000-0002-8670-0408; Okorokov,
   Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900; Gutierrez,
   Thomas/0000-0002-0330-6414; Mohanty, Bedangadas/0000-0001-9610-2914;
   Barnby, Lee/0000-0001-7357-9904; Strikhanov,
   Mikhail/0000-0003-2586-0405; Fornazier Guimaraes, Karin
   Silvia/0000-0003-0578-9533; Takahashi, Jun/0000-0002-4091-1779;
   Peitzmann, Thomas/0000-0002-7116-899X; Castillo Castellanos,
   Javier/0000-0002-5187-2779; Sumbera, Michal/0000-0002-0639-7323; Fisyak,
   Yuri/0000-0002-3151-8377; Bhasin, Anju/0000-0002-3687-8179; Sorensen,
   Paul/0000-0001-5056-9391; Thomas, James/0000-0002-6256-4536; van
   Leeuwen, Marco/0000-0002-5222-4888
NR 41
TC 12
Z9 12
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0954-3899
EI 1361-6471
J9 J PHYS G NUCL PARTIC
JI J. Phys. G-Nucl. Part. Phys.
PD MAR
PY 2007
VL 34
IS 3
BP 451
EP 465
DI 10.1088/0954-3899/34/3/004
PG 15
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 138NS
UT WOS:000244370000005
ER

PT J
AU Gershon, T
   Soni, A
AF Gershon, Tim
   Soni, Amarjit
TI Null tests of the standard model at an international super B factory
SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
LA English
DT Review
ID DIRECT CP VIOLATION; TRANSVERSE TAU-POLARIZATION; RADIATIVE B(B-S)
   DECAYS; EXTRACTING V-TD; FINAL-STATES; ASYMMETRIES; PHYSICS;
   FEASIBILITY; SYMMETRY; DETECTOR
AB In light of the results from the B factories, which clearly show that the Cabibbo-Kobayashi-Maskawa mechanism is the dominant source of the observed CP violation in K and B physics, only small deviations due to sources of CP violation beyond the Standard Model are likely. Therefore, in the quest for new physics, null tests of the Standard Model become increasingly important. Motivated by these considerations, we describe a number of approximate null tests of the standard model. These tests provide several theoretically clean approaches to searching for new physics in the B system. We find that in many cases the requisite sensitivity can only be achieved with an International Super B Factory, with luminosity around 1036 cm(-2) s(-1).
C1 Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Gershon, T (reprint author), Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
NR 112
TC 11
Z9 11
U1 1
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0954-3899
EI 1361-6471
J9 J PHYS G NUCL PARTIC
JI J. Phys. G-Nucl. Part. Phys.
PD MAR
PY 2007
VL 34
IS 3
BP 479
EP 492
DI 10.1088/0954-3899/34/3/006
PG 14
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 138NS
UT WOS:000244370000007
ER

PT J
AU Beresh, SJ
   Henfling, JF
   Erven, RJ
   Spillers, RW
AF Beresh, Steven J.
   Henfling, John F.
   Erven, Rocky J.
   Spillers, Russell W.
TI Vortex structure produced by a laterally inclined supersonic jet in
   transonic crossflow
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article; Proceedings Paper
CT AIAA 35th Fluid Dynamics Conference
CY JUN 06-09, 2006
CL Toronto, CANADA
SP Amer Inst Aeronaut & Astronaut
ID PARTICLE IMAGE VELOCIMETRY; TURBULENT-BOUNDARY-LAYER; TRANSVERSE JET;
   ROUND JET; INJECTION; FREESTREAM; PENETRATION; PERFORMANCE; DYNAMICS
AB Stereoscopic particle image velocimetry data have been collected for a supersonic jet exhausting into a transonic crossflow from a laterally inclined scarfed nozzle installed flush in a flat plate. Mean velocity fields and their derived vorticity were measured at a single crossplane in the far-field for varied jet-to-freestream dynamic pressure ratio J and nozzle inclination angles of 0, 15,30, and 45 deg. The data reveal the induced counterrotating vortex pair and the horseshoe vortex formed as the jet exits the nozzle, both of which appear symmetric for the uncanted nozzle. As the nozzle inclination is increased, the vortex pair becomes tilted opposite the nozzle cant and shifts closer to the wall, where the lower vortex attains a larger strength than its counterpart until it eventually becomes so dominant that the opposite vortex is undetectable. Regardless of nozzle cant, vortex strengths increase with larger J. Vortex distances from the wall increase with J at lower nozzle cants, but at larger inclination, the position of the vortex nearer the wall varies less with J than does its complement. Thus, at a sufficiently large nozzle cant, the jet interaction effectively produces a single vortex whose position does not shift greatly with jet strength.
C1 Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
RP Beresh, SJ (reprint author), Sandia Natl Labs, Engn Sci Ctr, POB 5800,Mail Stop 0834, Albuquerque, NM 87185 USA.
EM sjberes@sandia.gov
NR 38
TC 3
Z9 3
U1 0
U2 9
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0748-4658
J9 J PROPUL POWER
JI J. Propul. Power
PD MAR-APR
PY 2007
VL 23
IS 2
BP 353
EP 363
DI 10.2514/1.25444
PG 11
WC Engineering, Aerospace
SC Engineering
GA 147DN
UT WOS:000244983700012
ER

PT J
AU Ayriss, J
   Woods, T
   Bradbury, A
   Pavlik, P
AF Ayriss, Joanne
   Woods, Travis
   Bradbury, Andrew
   Pavlik, Peter
TI High-throughput screening of single-chain antibodies using multiplexed
   flow cytometry
SO JOURNAL OF PROTEOME RESEARCH
LA English
DT Article
DE antibodies; single-chain antibodies; high-throughput screening; flow
   cytometry
ID PHAGE DISPLAY LIBRARY; MONOCLONAL-ANTIBODIES; MOLECULAR EVOLUTION;
   AFFINITY MATURATION; MASS-TRANSPORT; VIRUS; ANTIGEN; PROTEIN;
   IMMUNOASSAY; ASSAY
AB We have developed a screening method that has the potential to streamline the high-throughput analysis of affinity reagents for proteomic projects. By using multiplexed flow cytometry, we can simultaneously determine the relative expression levels, the identification of nonspecific binding, and the discrimination of fine specificities to generate a complete functional profile for each clone. The quality and quantity of data, combined with significant reductions in analysis time and antigen consumption, provide notable advantages over standard ELISA methods and yield much information in the primary screen which is usually only obtained in later screens. By combining high-throughput screening capabilities with multiplex technology, we have redefined the parameters for the initial identification of affinity reagents recovered from combinatorial libraries and removed a significant bottleneck in the generation of affinity reagents on a proteomic scale.
C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA.
RP Bradbury, A (reprint author), Los Alamos Natl Lab, Biosci Div, Mail Stop M888,POB 1663, Los Alamos, NM 87545 USA.
EM amb@lanl.gov; Pavlik@lanl.gov
OI Bradbury, Andrew/0000-0002-5567-8172
NR 62
TC 26
Z9 30
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1535-3893
J9 J PROTEOME RES
JI J. Proteome Res.
PD MAR
PY 2007
VL 6
IS 3
BP 1072
EP 1082
DI 10.1021/pr0604108
PG 11
WC Biochemical Research Methods
SC Biochemistry & Molecular Biology
GA 142GW
UT WOS:000244638400015
PM 17330944
ER

PT J
AU McEnerney, J
   Stengle, G
AF McEnerney, J.
   Stengle, G.
TI Alternative evidence for nonnegativity
SO JOURNAL OF PURE AND APPLIED ALGEBRA
LA English
DT Article
AB Sufficient conditions for definiteness of a real polynomial other than the positivstellensatz are defined and illustrated by example. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Stengle, G (reprint author), 42 Markham Rd, Princeton, NJ 08540 USA.
EM mcenerney1@Ilnl.gov; gas0@lehigh.edu
NR 12
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-4049
J9 J PURE APPL ALGEBRA
JI J. Pure Appl. Algebr.
PD MAR
PY 2007
VL 208
IS 3
BP 989
EP 992
DI 10.1016/j.jpaa.2006.03.030
PG 4
WC Mathematics, Applied; Mathematics
SC Mathematics
GA 119AW
UT WOS:000242985600017
ER

PT J
AU Olson, GL
AF Olson, Gordon L.
TI Gray radiation transport in multi-dimensional stochastic binary media
   with material temperature coupling
SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
LA English
DT Article
DE radiation transport; radiative transfer; stochastic media; participating
   media
ID EQUATIONS
AB Models for radiation transport through stochastic binary media are tested in two and three dimensions. Theoretical models for stochastic media transport usually assume Markovian processes and exponential chord length statistics that are not fully realizable in multi-dimensions. Therefore, the previous validation studies done using one-dimensional (1D) transport are not necessarily applicable to multi-dimensions. The work presented here analyzes pure radiation transport and radiation when it is coupled to material energy balance. The sensitivity to chord length statistics is found to be different for these two cases. The assumptions made to linearize the transport equation are discussed and results for both linear and nonlinear transport are shown. For the coupled radiation and material problem in 2D and 3D, the mean radiation field differs significantly from previous analyses done in 1D. The differences between 1D and multi-dimensions are discussed. Modeling of the mean radiation field in the parameter range explored can be achieved with a simple formula for the mean opacity when the opacities are constant in space and time. Temperature-dependent opacities in stochastic media require different formulas for the effective opacity. Published by Elsevier Ltd.
C1 Los Alamos Natl Lab, Transport Methods Grp, Middleton, WI 53562 USA.
RP Olson, GL (reprint author), Los Alamos Natl Lab, Transport Methods Grp, CCS-4,1406 Club Circle, Middleton, WI 53562 USA.
EM olson99@tds.net
NR 10
TC 10
Z9 10
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-4073
J9 J QUANT SPECTROSC RA
JI J. Quant. Spectrosc. Radiat. Transf.
PD MAR
PY 2007
VL 104
IS 1
BP 86
EP 98
DI 10.1016/j.jqsrt.2006.08.013
PG 13
WC Optics; Spectroscopy
SC Optics; Spectroscopy
GA 115UG
UT WOS:000242758700007
ER

PT J
AU Brantley, PS
AF Brantley, Patrick S.
TI Angularly adaptive P-1-double P-0 flux-limited diffusion solutions of
   non-equilibrium grey radiative transfer problems
SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
LA English
DT Article
DE radiative transfer; non-equilibrium flux-limited radiation diffusion;
   spherical harmonics approximation; double spherical harmonics
   approximation
ID TRANSPORT; SCATTERING; APPROXIMATIONS; EQUATIONS; SCHEME; TIME
AB The double spherical harmonics angular approximation in the lowest order, i.e. double P-0 (DP0), is developed for the solution of time-dependent non-equilibrium grey radiative transfer problems in planar geometry. Although the DP0 diffusion approximation is expected to be less accurate than the P, diffusion approximation at and near thermodynamic equilibrium, the DP0 angular approximation can more accurately capture the complicated angular dependence near a nonequilibrium radiation wave front. In addition, the DP0 approximation should be more accurate in non-equilibrium optically thin regions where the positive and negative angular domains are largely decoupled. We develop an adaptive angular technique that locally uses either the DP0 or P-1 flux-limited diffusion approximation depending on the degree to which the radiation and material fields are in thermodynamic equilibrium. Numerical results are presented for two test problems due to Su and Olson and to Ganapol and Pomraning for which semi-analytic transport solutions exist. These numerical results demonstrate that the adaptive P-1-DP0 diffusion approximation can yield improvements in accuracy over the standard P, diffusion approximation, both without and with flux-limiting, for non-equilibrium grey radiative transfer. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Brantley, PS (reprint author), Lawrence Livermore Natl Lab, POB 808,L-023,8000 E Ave, Livermore, CA 94551 USA.
EM brantley1@llnl.gov
NR 25
TC 2
Z9 2
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-4073
J9 J QUANT SPECTROSC RA
JI J. Quant. Spectrosc. Radiat. Transf.
PD MAR
PY 2007
VL 104
IS 1
BP 116
EP 132
DI 10.1016/j.jqsrt.2006.08.016
PG 17
WC Optics; Spectroscopy
SC Optics; Spectroscopy
GA 115UG
UT WOS:000242758700009
ER

PT J
AU Briner, JP
   Overeem, I
   Miller, G
   Finkel, R
AF Briner, Jason P.
   Overeem, Irina
   Miller, Gifford
   Finkel, Robert
TI The deglaciation of Clyde Inlet, northeastern Baffin Island, Arctic
   Canada
SO JOURNAL OF QUATERNARY SCIENCE
LA English
DT Article
DE deglaciation; Laurentide; Ice Sheet; Baffin Island; cosmogenic exposure
   dating; radiocarbon dating
ID LAST GLACIAL MAXIMUM; ICE SHEETS; NORTH-AMERICA; LANDSCAPES; HISTORY;
   EROSION; RATES; LAURENTIDE; CHRONOLOGY; SURFACES
AB The behaviour of ice sheets as they retreated from their Last Glacial Maximum (LGM) positions provides insights into Lateglacial and early Holocene ice-sheet dynamics and climate change. The pattern of deglaciation of the Laurentide Ice Sheet (LIS) in arctic fiord landscapes can now be well dated using cosmogenic exposure dating. We use cosmogenic exposure and radiocarbon ages to constrain the deglaciation history of Clyde Inlet, a 120 km long fiord on northeastern Baffin Island. The LIS reached the continental shelf during the LGM, retreated from the coastal lowlands by 12.5 +/- 0.7 ka (n = 3), and from the fiord mouth by 11.7 +/- 2.2 ka (n=4). Rapid retreat from the outer fiord occurred 10.3 +/- 1.3 ka (n=6), with the terminus reaching the inner fiord shortly after 9.4 ka (n=2), where several moraine systems were deposited between ca. 9.4 and ca. 8.4 ca. These moraines represent fluctuations of the LIS during the warmest summers since the last interglaciation, and this suggests that the ice sheet was responding to increased snowfall. Before retreating from the head of Clyde Inlet, the LIS margin fluctuated at least twice between ca. 7.9 and ca. 8.5 ka, possibly in response to the 8.2 ka cold event. Copyright (C) 2006 John Wiley & Sons, Ltd.
C1 SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA.
   Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA.
   Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA.
RP Briner, JP (reprint author), SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA.
EM jbriner@buffalo.edu
NR 41
TC 27
Z9 27
U1 0
U2 3
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0267-8179
J9 J QUATERNARY SCI
JI J. Quat. Sci.
PD MAR
PY 2007
VL 22
IS 3
BP 223
EP 232
DI 10.1002/jqs.1057
PG 10
WC Geosciences, Multidisciplinary; Paleontology
SC Geology; Paleontology
GA 146EA
UT WOS:000244916100003
ER

PT J
AU Aizawa, K
   Yori, K
   Kaminaga, C
   Yamashita, T
   Kinoshita, M
   Oda, S
   Mitani, H
AF Aizawa, Kouichi
   Yori, Kanako
   Kaminaga, Chiharu
   Yamashita, Toshikazu
   Kinoshita, Masato
   Oda, Shoji
   Mitani, Hiroshi
TI Responses of embryonic germ cells of the radiation-sensitive Medaka
   mutant to gamma-irradiation
SO JOURNAL OF RADIATION RESEARCH
LA English
DT Article
DE embryonic germ cell; gamma-irradiation; olvas-GFP; ric1; Medaka
ID FISH ORYZIAS-LATIPES; MAJOR DEVELOPMENTAL TRANSITION; GREEN FLUORESCENT
   PROTEIN; EARLY XENOPUS-EMBRYOS; MIDBLASTULA TRANSITION; ZEBRAFISH;
   GENOME; VASA; EXPRESSION; VERTEBRATE
AB Embryonic germ cell/gamma-irradiation/Olvas-GFP/ric1/Medaka.
   The radiation-sensitive mutant "ric1" has a defect in the repair mechanism of DNA double strand breaks induced by gamma-rays in early embryogenesis. In this study, the new radiation- sensitive Medaka (Oryzias latipes) strain, riclolvas-GFP was established to monitor the development of germ cells in vivo. The development of germ cells was normal in riclolvas-GFP, but embryonic germ cells at Stage 7 (32-cell stage) and Stage 33 (extensive proliferating stage of PGCs) showed higher radiosensitivity. There was no sex difference in germ cell radiosensitivity at Stage 7, but female embryos showed higher radiosensitivity than male at Stage 33. In embryos obtained by crossing ric1 female with olvas-GFP male, germ cells showed similar radiosensitivity to riclolvas-GFP and increased sensitivity compared to embryos obtained from crossing wild-type female with olvas-GFP male at Stage 7. These results suggest that germ cells have the ric1 dependent DNA repair system during embryogenesis and the maternal ric1gene factor may play a critical role in radiosensitivity at an early developmental stage.
C1 Univ Tokyo, Grad Sch Frontier Sci, Dept Integrated Biosci, Chiba 2778562, Japan.
   Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
   Kyoto Univ, Grad Sch Agr, Div Appl Biosci, Kyoto 6068502, Japan.
RP Mitani, H (reprint author), Univ Tokyo, Grad Sch Frontier Sci, Dept Integrated Biosci, Chiba 2778562, Japan.
EM mitani@k.u-tokyo.ac.jp
NR 30
TC 4
Z9 4
U1 1
U2 4
PU JAPAN RADIATION RESEARCH SOC
PI CHIBA
PA C/O NAT INST RADIOLOGICAL SCI 9-1 ANAGAWA-4-CHOME INAGE-KU, CHIBA, 263,
   JAPAN
SN 0449-3060
J9 J RADIAT RES
JI J. Radiat. Res.
PD MAR
PY 2007
VL 48
IS 2
BP 121
EP 128
DI 10.1269/jrr.06091
PG 8
WC Biology; Radiology, Nuclear Medicine & Medical Imaging
SC Life Sciences & Biomedicine - Other Topics; Radiology, Nuclear Medicine
   & Medical Imaging
GA 167FJ
UT WOS:000246436500005
PM 17339749
ER

PT J
AU Chichester, DL
   Simpson, JD
   Lemchak, M
AF Chichester, D. L.
   Simpson, J. D.
   Lemchak, M.
TI Advanced compact accelerator neutron generator technology for active
   neutron interrogation field work
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
LA English
DT Article
ID ACTIVATION ANALYSIS
AB Due to a need for security screening instruments capable of detecting explosives and nuclear materials there is growing interest in neutron generator systems suitable for field use for applications broadly referred to as active neutron interrogation (ANI). Over the past two years Thermo Electron Corporation has developed a suite of different compact accelerator neutron generator products specifically designed for ANI field work to meet this demand. These systems incorporate hermetically-sealed particle accelerator tubes designed to produce fast neutrons using either the deuterium-deuterium (E (n) = 2.5 MeV) or deuterium-tritium (E (n) = 14.1 MeV) fusion reactions. Employing next-generation features including advanced sealed-tube accelerator designs, all-digital control electronics and innovative housing configurations these systems are suitable for many different uses. A compact system weighing less than 14 kg (MP 320) with a lifetime exceeding 1000 hours has been developed for portable applications. A system for fixed installations (P 325) has been developed with an operating life exceeding 4500 hours that incorporates specific serviceability features for permanent facilities with difficult-to-access shield blocks. For associated particle imaging (API) investigations a second-generation system (API 120) with an operating life of greater than 1000 hours has been developed for field use in which a high resolution fiber-optic imaging plate is specially configured to take advantage of a neutron point-source spot size of similar to 2 mm.
C1 Thermo Elect Corp, Colorado Springs, CO 80919 USA.
RP Chichester, DL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM dlchich@sandia.gov
NR 23
TC 28
Z9 30
U1 2
U2 9
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0236-5731
J9 J RADIOANAL NUCL CH
JI J. Radioanal. Nucl. Chem.
PD MAR
PY 2007
VL 271
IS 3
BP 629
EP 637
DI 10.1007/s10967-007-0318-7
PG 9
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
   Technology
SC Chemistry; Nuclear Science & Technology
GA 131XV
UT WOS:000243906700018
ER

PT J
AU Harrison, J
   Leggett, R
   Lloyd, D
   Phipps, A
   Scott, B
AF Harrison, John
   Leggett, Rich
   Lloyd, David
   Phipps, Alan
   Scott, Bobby
TI Polonium-210 as a poison
SO JOURNAL OF RADIOLOGICAL PROTECTION
LA English
DT Review
ID RADIATION HEPATITIS; BONE-MARROW; POLONIUM-210; IRRADIATION; METABOLISM;
   ABSORPTION; RETENTION; TOLERANCE; INJECTION; BINDING
AB The death of Alexander Litvinenko on 23 November 2006 has brought into focus scientific judgements concerning the radiotoxicity of polonium-210 (Po-210). This paper does not consider the specific radiological circumstances surrounding the tragic death of Mr Litvinenko; rather, it provides an evaluation of published human and animal data and models developed for the estimation of alpha radiation doses from Po-210 and the induction of potentially fatal damage to different organs and tissues. Although uncertainties have not been addressed comprehensively, the reliability of key assumptions is considered. Concentrating on the possibility of intake by ingestion, the use of biokinetic and dosimetric models to estimate organ and tissue doses from Po-210 is examined and model predictions of the time-course of dose delivery are illustrated. Estimates are made of doses required to cause fatal damage, taking account of the possible effects of dose protraction and the relative biological effectiveness (RBE) of alpha particles compared to gamma and x-rays. Comparison of LD50 values ( dose to cause death for 50% of people) for different tissues with the possible accumulation of dose to these tissues suggests that bone marrow failure is likely to be an important component of multiple contributory causes of death occurring within a few weeks of an intake by ingestion. Animal data on the effects of Po-210 provide good confirmatory evidence of intakes and doses required to cause death within about 3 weeks. The conclusion is reached that 0.1-0.3 GBq or more absorbed to blood of an adult male is likely to be fatal within 1 month. This corresponds to ingestion of 1-3 GBq or more, assuming 10% absorption to blood. Well-characterised reductions in white cell counts would be observed. Bone marrow failure is likely to be compounded by damage caused by higher doses to other organs, including kidneys and liver. Even if the bone marrow could be rescued, damage to other organs can be expected to prove fatal.
C1 Hlth Protect Agcy, Radiat Protect Div, Ctr Radiat Chem & Environm Hazards, Didcot OX11 0RQ, Oxon, England.
   Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA.
   Lovelace Resp Res Inst, Albuquerque, NM 87108 USA.
RP Harrison, J (reprint author), Hlth Protect Agcy, Radiat Protect Div, Ctr Radiat Chem & Environm Hazards, Didcot OX11 0RQ, Oxon, England.
EM john.harrison@hpa.org.uk
NR 104
TC 71
Z9 75
U1 6
U2 24
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0952-4746
J9 J RADIOL PROT
JI J. Radiol. Prot.
PD MAR
PY 2007
VL 27
IS 1
BP 17
EP 40
DI 10.1088/0952-4746/27/1/001
PG 24
WC Environmental Sciences; Public, Environmental & Occupational Health;
   Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical
   Imaging
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
   Health; Nuclear Science & Technology; Radiology, Nuclear Medicine &
   Medical Imaging
GA 153LM
UT WOS:000245436400003
PM 17341802
ER

PT J
AU Chakoumakos, BC
   Custelcean, R
   Kamlyama, T
   Oikawa, K
   Sales, BC
   Lumsden, MD
AF Chakoumakos, B. C.
   Custelcean, R.
   Kamlyama, T.
   Oikawa, K.
   Sales, B. C.
   Lumsden, M. D.
TI Structural modulation in K2V3O8
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE K2V3O8 fresnoite-type structure; low-temperature phase transition; low
   temperature average structure refinement; crystal structure modulation;
   nonlinear optical material
ID FRAMEWORK-STRUCTURE TYPE; WEAK FERROMAGNETISM; CRYSTAL-STRUCTURE;
   FRESNOITE; BA2TIGE2O8; REFINEMENT; ELECTRON
AB To elucidate the phase transition at 115 K in the fresnoite-type compound K2V3O8, we undertook temperature-dependent neutron powder diffraction and single-crystal X-ray diffraction (XRD). For structure refinements in the nominal space group P4bm, the most dramatic change is evidenced by the a cell edge, which initially expands on cooling, then abruptly begins to contract at 115 K. The c cell edge contracts monotonically. The atomic displacement parameters (ADPs) also deviate from their expected temperature dependence at 115 K, where the oxygen atoms in the vanadium oxide plane exhibit an increase in apparent positional disorder. Similar changes in lattice parameters and ADPs are observed from the single-crystal XRD refinements. Below 115 K, weak superlattice reflections are clearly evident in XRD patterns recorded by a CCD detector, and these extra reflections can be indexed with the wave vector +/- 1/3 < I 10 > * + 1/2c*. Possible space groups for the modulated structure are P4(2)bc and P4nc. (c) 2006 Elsevier Inc. All rights reserved.
C1 Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
   High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan.
   Japan Atom Energy Agcy, Quantum Beam Sci Directorate, Tokai, Ibaraki 3050801, Japan.
RP Chakoumakos, BC (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, POB 2008,Bldg 7962, Oak Ridge, TN 37831 USA.
EM chakoumakobc@ornl.gov
RI Custelcean, Radu/C-1037-2009; Chakoumakos, Bryan/A-5601-2016; Lumsden,
   Mark/F-5366-2012
OI Custelcean, Radu/0000-0002-0727-7972; Chakoumakos,
   Bryan/0000-0002-7870-6543; Lumsden, Mark/0000-0002-5472-9660
NR 29
TC 6
Z9 6
U1 1
U2 23
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD MAR
PY 2007
VL 180
IS 3
BP 812
EP 817
DI 10.1016/j.jssc.2006.11.033
PG 6
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 151KI
UT WOS:000245288500002
ER

PT J
AU Karpowich, L
   Wilcke, S
   Yu, R
   Harley, G
   Reimer, JA
   De Jonghe, LC
AF Karpowich, L.
   Wilcke, S.
   Yu, Rong
   Harley, G.
   Reimer, J. A.
   De Jonghe, L. C.
TI Synthesis and characterization of mixed-morphology CePO4 nanoparticles
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE CePO4; cerium phosphate; monazite; nanoparticle; P-31 solid-state NMR
ID THERMAL-BEHAVIOR; CERIUM PHOSPHATE; MONAZITE; LA; CE; NMR
AB Cerium phosphate nanoparticles with diameters of 10-180 nm were synthesized by a variety of solution techniques. X-ray diffraction (XRD) determined the crystalline phase(s) present in each sample. Population, shift, and spin-lattice relaxation P-31 solid-state nuclear magnetic resonance (NMR) measurements accounted for all the P-31 nuclei expected in each sample, and were able to distinguish between phosphorous nuclei in different environments and phases. Transmission electron microscopy (TEM) characterized the morphology and crystallinity of the powder samples as well as of the sintered compacts of the powders. In conjunction with TEM, energy-dispersive spectroscopy (EDS) provided a measure of the composition of the bulk intergranular regions within each CePO4 sample. The presence of an amorphous, phosphate-rich intergranular phase was found in those samples prepared by dissolution of ceria in H3PO4 under various conditions. (c) 2006 Elsevier Inc. All rights reserved.
C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP De Jonghe, LC (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
EM dejonghe@lbl.gov
RI Yu, Rong/A-3011-2008
OI Yu, Rong/0000-0003-1687-3597
NR 17
TC 21
Z9 23
U1 2
U2 30
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD MAR
PY 2007
VL 180
IS 3
BP 840
EP 846
DI 10.1016/j.jssc.2006.12.009
PG 7
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 151KI
UT WOS:000245288500006
ER

PT J
AU Dorogova, M
   Navrotsky, A
   Boatner, LA
AF Dorogova, M.
   Navrotsky, A.
   Boatner, L. A.
TI Enthalpies of formation of rare earth orthovanadates, REVO4
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
DE enthalpy of formation; rare earth vanadates; high-temperature oxide-melt
   solution calorimetry
ID HIGH-TEMPERATURE CALORIMETRY; VANADIUM(V) OXIDE; PHASE-EQUILIBRIA;
   MAGNETIC-PROPERTIES; ORTHO-VANADATES; BINARY-SYSTEMS; ERBIUM OXIDES;
   ENERGY-LEVELS; 1200-DEGREES-C; THERMOCHEMISTRY
AB Rare earth orthovanadates, REVO4, having the zircon structure, form a series of materials interesting for magnetic, optical, sensor, and electronic applications. Enthalpies of formation of REVO4 compounds (RE = Sc, Y, Ce-Nd, Sm-Tm, Lu) were determined by oxide melt solution calorimetry in lead borate (2PbO center dot 2B(2)O(3)) solvent at 1075 K. The enthalpies of formation from oxide components become more negative with increasing RE ionic radius. This trend is similar to that obtained for the rare earth phosphates. (c) 2006 Elsevier Inc. All rights reserved.
C1 Univ Calif Davis, Davis Chem Dept, Thermochem Facil, Davis, CA 95616 USA.
   NEAT ORU, Davis, CA 95616 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Navrotsky, A (reprint author), Univ Calif Davis, Davis Chem Dept, Thermochem Facil, Davis, CA 95616 USA.
EM anavrotsky@ucdavis.edu
RI Boatner, Lynn/I-6428-2013
OI Boatner, Lynn/0000-0002-0235-7594
NR 45
TC 23
Z9 23
U1 1
U2 3
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD MAR
PY 2007
VL 180
IS 3
BP 847
EP 851
DI 10.1016/j.jssc.2006.12.001
PG 5
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA 151KI
UT WOS:000245288500007
ER

PT J
AU Palmer, DA
   Rard, JA
AF Palmer, Donald A.
   Rard, Joseph A.
TI Untitled
SO JOURNAL OF SOLUTION CHEMISTRY
LA English
DT Editorial Material
C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Palmer, DA (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM Solution_Chemistry@comcast.net; rard1@llnl.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER/PLENUM PUBLISHERS
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0095-9782
J9 J SOLUTION CHEM
JI J. Solut. Chem.
PD MAR
PY 2007
VL 36
IS 3
BP 287
EP 288
DI 10.1007/s10953-007-9138-1
PG 2
WC Chemistry, Physical
SC Chemistry
GA 152LI
UT WOS:000245363100001
ER

PT J
AU Sanbonmatsu, KY
   Tung, CS
AF Sanbonmatsu, K. Y.
   Tung, C. -S.
TI High performance computing in biology: Multimillion atom simulations of
   nanoscale systems
SO JOURNAL OF STRUCTURAL BIOLOGY
LA English
DT Review
DE molecular dynamics simulation; ribosome; RNA; high performance
   computing; supercomputing; RNA structure
ID MOLECULAR-DYNAMICS SIMULATIONS; 30S RIBOSOMAL-SUBUNIT; NUCLEIC-ACIDS;
   TRANSFER-RNA; CRYOELECTRON MICROSCOPY; PROTEIN DYNAMICS; WATER;
   DISCRIMINATION; NANOSECONDS; ALGORITHM
AB Computational methods have been used in biology for sequence analysis (bioinformatics), all-atom simulation (molecular dynamics and quantum calculations), and more recently for modeling biological networks (systems biology). Of these three techniques, all-atom simulation is currently the most computationally demanding, in terms of compute load, communication speed, and memory load. Breakthroughs in electrostatic force calculation and dynamic load balancing have enabled molecular dynamics simulations of large biomolecular complexes. Here, we report simulation results for the ribosome, using approximately 2.64 million atoms, the largest all-atom biomolecular simulation published to date. Several other nano-scale systems with different numbers of atoms were studied to measure the performance of the NAMD molecular dynamics simulation program on the Los Alamos National Laboratory Q Machine. We demonstrate that multimillion atom systems represent a 'sweet spot' for the NAMD code on large supercomputers. NAMD displays an unprecedented 85% parallel scaling efficiency for the ribosome system on 1024 CPUs. We also review recent targeted molecular dynamics simulations of the ribosome that prove useful for studying conformational changes of this large biomolecular complex in atomic detail. (c) 2006 Elsevier Inc. All rights reserved.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Sanbonmatsu, KY (reprint author), Los Alamos Natl Lab, Div Theoret, MS K710, Los Alamos, NM 87545 USA.
EM kys@lanl.gov
FU NIGMS NIH HHS [R01 GM072686, R01-GM072686]
NR 57
TC 94
Z9 96
U1 0
U2 19
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1047-8477
J9 J STRUCT BIOL
JI J. Struct. Biol.
PD MAR
PY 2007
VL 157
IS 3
BP 470
EP 480
DI 10.1016/j.jsb.2006.10.023
PG 11
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 144MN
UT WOS:000244800400004
PM 17187988
ER

PT J
AU Wang, J
   Stover, HDH
   Hitchcock, AP
   Tyliszczak, T
AF Wang, Jian
   Stover, Harald D. H.
   Hitchcock, Adam P.
   Tyliszczak, Tolek
TI Chemically selective soft X-ray patterning of polymers
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE soft X-ray; lithography; chemically selective; radiation damage; C 1s
   NEXAFS; PMMA; PAN; PECA
ID ADVANCED LIGHT-SOURCE; RADIATION-DAMAGE; LITHOGRAPHY; SPECTROMICROSCOPY;
   TRANSMISSION; SPECTROSCOPY; MICROSCOPY; ABSORPTION
AB The chemically selective modification of polymer mixtures by monochromated soft X-rays has been explored using the high-brightness fine-focused 50 nm beam of a scanning transmission X-ray microscope. Four different polymer systems were examined: a polymethylmethacrylate (PMMA) polyacrylonitrile (PAN) bilayer film; a PMMA-blend-PAN microphase-separated film; a poly(MMA-co-AN) copolymer film; and a poly(ethyl cyanoacrylate) homopolymer film. A high level of chemically selective modification was achieved for the PMMA/PAN bilayer; in particular, irradiation at 288.45 eV selectively removed the carbonyl group from PMMA while irradiation at 286.80 eV selectively reduced the nitrile group of PAN, even when these irradiations were carried out at the same (x,y) position of the sample. In the last two homogenous polymer systems, similar amounts of damage to the nitrile and carbonyl groups occurred during irradiation at either 286.80 or 288.45 eV. This is attributed to damage transfer between the C  N and C=O groups mediated by primary electrons, secondary electrons or radical/ionic processes, aided by their close spatial proximity. Although the overall thickness of the bilayer sample at 70 nm is smaller than the lateral line spreading of 100 nm, the interface between the layers appears to effectively block the transport of energy, and hence damage, between the two layers. The origins of the line spreading in homogeneous phases and possible origins of the damage blocking effect of the interface are discussed. To demonstrate chemically selective patterning, high-resolution multi-wavelength patterns were created in the PMMA/PAN bilayer system.
C1 McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, Canada.
   McMaster Univ, Brockhouse Inst Mat Res, Hamilton, ON L8S 4M1, Canada.
   Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Hitchcock, AP (reprint author), McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada.
EM aph@mcmaster.ca
RI Wang, Jian/M-1805-2013
NR 34
TC 15
Z9 15
U1 1
U2 9
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAR
PY 2007
VL 14
BP 181
EP 190
DI 10.1107/S0909049506053829
PN 2
PG 10
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 136FH
UT WOS:000244207500001
PM 17317919
ER

PT J
AU Song, JH
   Mathew, D
   Jacob, SA
   Corbett, L
   Moorhead, P
   Soltis, SM
AF Song, Jinhu
   Mathew, Deepa
   Jacob, Sandhya A.
   Corbett, Laura
   Moorhead, Penjit
   Soltis, S. Michael
TI Diffraction-based automated crystal centering
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE crystal alignment and centering; beamline automation
ID MACROMOLECULAR CRYSTALLOGRAPHY; PROTEIN CRYSTALS; SYSTEM; BEAMLINE; FIP
AB A fully automated procedure for detecting and centering protein crystals in the X-ray beam of a macromolecular crystallography beamline has been developed. A cryo-loop centering routine that analyzes video images with an edge detection algorithm is first used to determine the dimensions of the loop holding the sample; then low-dose X-rays are used to record diffraction images in a grid over the edge and face plane of the loop. A three-dimensional profile of the crystal based on the number of diffraction spots in each image is constructed. The derived center of mass is then used to align the crystal to the X-ray beam. Typical samples can be accurately aligned in similar to 2-3 min. Because the procedure is based on the number of 'good' spots as determined by the program Spotfinder, the best diffracting part of the crystal is aligned to the X-ray beam.
C1 Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
   Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
RP Soltis, SM (reprint author), Stanford Synchrotron Radiat Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
EM soltis@slac.stanford.edu
NR 22
TC 41
Z9 41
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAR
PY 2007
VL 14
BP 191
EP 195
DI 10.1107/S0909049507004803
PN 2
PG 5
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 136FH
UT WOS:000244207500002
PM 17317920
ER

PT J
AU Shastri, SD
   Almer, J
   Ribbing, C
   Cederstrom, B
AF Shastri, S. D.
   Almer, J.
   Ribbing, C.
   Cederstrom, B.
TI High-energy X-ray optics with silicon saw-tooth refractive lenses
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE saw-tooth lenses; refractive lenses; high-energy X-rays; X-ray optics
ID ASYMMETRIC LAUE CRYSTALS; SYNCHROTRON-RADIATION; INDUCED FLUORESCENCE;
   DISTRIBUTIONS; SCATTERING; MONOCHROMATORS; DEFORMATION; BERYLLIUM;
   UNDULATOR; RANGE
AB Silicon saw-tooth refractive lenses have been in successful use for vertical focusing and collimation of high-energy X-rays (50-100 keV) at the 1-ID undulator beamline of the Advanced Photon Source. In addition to presenting an effectively parabolic thickness profile, as required for aberration-free refractive optics, these devices allow high transmission and continuous tunability in photon energy and focal length. Furthermore, the use of a single-crystal material (i.e. Si) minimizes small-angle scattering background. The focusing performance of such saw-tooth lenses, used in conjunction with the 1-ID beamline's bent double-Laue monochromator, is presented for both short (similar to 1: 0.02) and long (similar to 1: 0.6) focal-length geometries, giving line-foci in the 2 mu m-25 mu m width range with 81 keV X-rays. In addition, a compound focusing scheme was tested whereby the radiation intercepted by a distant short-focal-length lens is increased by having it receive a collimated beam from a nearer ( upstream) lens. The collimation capabilities of Si saw-tooth lenses are also exploited to deliver enhanced throughput of a subsequently placed small-angular-acceptance high-energy-resolution post-monochromator in the 50-80 keV range. The successful use of such lenses in all these configurations establishes an important detail, that the pre-monochromator, despite being comprised of vertically reflecting bent Laue geometry crystals, can be brilliance-preserving to a very high degree.
C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Univ Uppsala, Dept Engn Sci, Uppsala, Sweden.
   Royal Inst Technol, Dept Phys, Stockholm, Sweden.
RP Shastri, SD (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
EM shastri@aps.anl.gov
NR 36
TC 34
Z9 34
U1 2
U2 10
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAR
PY 2007
VL 14
BP 204
EP 211
DI 10.1107/S0909049507003962
PN 2
PG 8
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 136FH
UT WOS:000244207500004
PM 17317922
ER

PT J
AU Evans, KA
   Mavrogenes, J
   Newville, M
AF Evans, K. A.
   Mavrogenes, J.
   Newville, M.
TI The effect of CO2 on the speciation of bromine in low-temperature
   geological solutions: an XANES study
SO JOURNAL OF SYNCHROTRON RADIATION
LA English
DT Article
DE XANES; RbBr; CO2; XAS
ID RAY-ABSORPTION SPECTROSCOPY; SYNTHETIC FLUID INCLUSIONS; SUPERCRITICAL
   WATER; MICELLAR SOLUTIONS; ION; MOLECULES; HYDRATION; PRESSURE;
   HYDROGEN; SYSTEM
AB CO2-rich solutions are common in geological environments. An XANES (X-ray absorption near-edge structure) study of Br in CO2-bearing synthetic fluid inclusions has revealed that Br exhibits a strong pre-edge feature at temperatures from 298 to 423 K. Br in CO2-free solutions does not show such a feature. The feature becomes smaller and disappears as temperature increases, but reappears when temperature is reduced. The size of the feature increases with increasing X(CO2) in the fluid inclusion, where X(CO2) is the mole fraction of CO2 in the solution [n(CO2)/(n(CO2) + n(H2O) + n(RbBr)); n indicates the number of moles]. The pre-edge feature is similar to that shown by covalently bonded Br, but observed and calculated concentrations of plausible Br-bearing covalent compounds (Br-2, CH3Br and HBr) are vanishingly small. An alternative possibility is that CO2 affects the hydration of Br sufficiently that the charge density changes to favour the 1s-p level transitions that are thought to cause the pre-edge peak. The distance between the first two post-edge maxima in the XANES also decreases with increasing X(CO2). This is attributed to a CO2-related decrease in the polarity of the solvent. The proposed causes of the observed features are not integrated into existing geochemical models; thus CO2-bearing solutions could be predicted poorly by such models, with significant consequences for models of geological processes such as ore-formation and metamorphism.
C1 Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia.
   Argonne Natl Lab, Adv Photon Source, GSECARS, Argonne, IL 60439 USA.
RP Evans, KA (reprint author), Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia.
EM katy.evans@anu.edu.au
RI Evans, Katy/G-5748-2011
OI Evans, Katy/0000-0001-5144-4507
NR 28
TC 6
Z9 7
U1 0
U2 15
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0909-0495
J9 J SYNCHROTRON RADIAT
JI J. Synchrot. Radiat.
PD MAR
PY 2007
VL 14
BP 219
EP 226
DI 10.1107/S0909049507001112
PN 2
PG 8
WC Instruments & Instrumentation; Optics; Physics, Applied
SC Instruments & Instrumentation; Optics; Physics
GA 136FH
UT WOS:000244207500006
PM 17317924
ER

PT J
AU Buckley, RL
   Hunter, CH
   Addis, RP
   Parker, MJ
AF Buckley, Robert L.
   Hunter, Charles H.
   Addis, Robert P.
   Parker, Matthew J.
TI Modeling dispersion from toxic gas released after a train collision in
   Graniteville, SC
SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
LA English
DT Article
ID SYSTEM
AB The Savannah River National Laboratory (SRNL) Weather Information and Display System was used to provide meteorological and atmospheric modeling/consequence assessment support to state and local agencies after the collision of two Norfolk Southern freight trains on the morning of January 6, 2005. This collision resulted in the release of several toxic chemicals to the environment, including chlorine. The dense and highly toxic cloud of chlorine gas that formed in the vicinity of the accident was responsible for 9 fatalities and caused injuries to more than 500 others. Transport model results depicting the forecast path of the ongoing release were made available to emergency managers in the county's Unified Command Center shortly after SRNL received a request for assistance. Support continued over the ensuing 2 days of the active response. The SRNL also provided weather briefings and transport/consequence assessment model results to responders from the South Carolina Department of Health and Environmental Control, the Savannah River Site (SRS) Emergency Operations Center, Department of Energy headquarters, and hazard material teams dispatched from the SRS. Operational model-generated forecast winds used in consequence assessments conducted during the incident were provided at 2-km horizontal grid spacing during the accident response. High-resolution Regional Atmospheric Modeling System (RAMS, version 4.3.0) simulation was later performed to examine potential influences of local topography on plume migration in greater detail. The detailed RAMS simulation was used to determine meteorology using multiple grids with an innermost grid spacing of 125 in. Results from the two simulations are shown to generally agree with meteorological observations at the time; consequently, local topography did not significantly affect wind in the area. Use of a dense gas dispersion model to simulate localized plume behavior using the higher-resolution winds indicated agreement with fatalities in the immediate area and visible damage to vegetation.
C1 Savannah River Natl Lab, Aiken, SC 29808 USA.
RP Buckley, RL (reprint author), Savannah River Natl Lab, Savannah River Site,773A-A1008, Aiken, SC 29808 USA.
EM robert.buckley@srnl.doe.gov
NR 18
TC 14
Z9 14
U1 2
U2 13
PU AIR & WASTE MANAGEMENT ASSOC
PI PITTSBURGH
PA ONE GATEWAY CENTER, THIRD FL, PITTSBURGH, PA 15222 USA
SN 1047-3289
J9 J AIR WASTE MANAGE
JI J. Air Waste Manage. Assoc.
PD MAR
PY 2007
VL 57
IS 3
BP 268
EP 278
PG 11
WC Engineering, Environmental; Environmental Sciences; Meteorology &
   Atmospheric Sciences
SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric
   Sciences
GA 144WR
UT WOS:000244827600003
PM 17385592
ER

PT J
AU Johnson, JA
   Schweizer, S
   Lubinsky, AR
AF Johnson, Jacqueline A.
   Schweizer, Stefan
   Lubinsky, Anthony R.
TI A glass-ceramic plate for mammography
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Crystallization in Glasses and Liquids
CY SEP 24-28, 2006
CL Jackson Hole, WY
ID RAY STORAGE PHOSPHOR; PHOTOSTIMULATED LUMINESCENCE; COMPUTED
   RADIOGRAPHY; CRYSTALLITE SIZE; RESOLUTION; PHASE
AB We developed translucent glass-ceramic image plates for digital mammography. The glass ceramics are based on europium-doped fluorozirconate glasses, which were additionally doped with chlorine to initiate the nucleation of barium chloride nanoparticles therein. The X-ray image is stored in the form of stable electron-hole pairs, which can be read out afterwards with a scanning laser beam in a "photostimulated luminescence" (PSL) process. Measurements of the required stimulating exposure, integrated PSL signal, and optical light spreading of the stimulating laser light were performed to allow projection of the detective quantum efficiency (DQE) for the proposed X-ray storage phosphor system. The projected DQE is compared with commercially available electronic mammography systems.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
   Univ Paderborn, Fac Sci, Dept Phys, D-33095 Paderborn, Germany.
   SUNY Stony Brook, Dept Radiol, Stony Brook, NY 11794 USA.
RP Johnson, JA (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM jaj@anl.gov
RI Schweizer, Stefan/H-3518-2011; Johnson, Jacqueline/P-4844-2014
OI Johnson, Jacqueline/0000-0003-0830-9275
NR 18
TC 34
Z9 34
U1 1
U2 11
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAR
PY 2007
VL 90
IS 3
BP 693
EP 698
DI 10.1111/j.1551-2916.2007.01488.x
PG 6
WC Materials Science, Ceramics
SC Materials Science
GA 143KM
UT WOS:000244720100005
ER

PT J
AU Tangeman, JA
   Phillips, BL
   Hart, R
AF Tangeman, Jean A.
   Phillips, Brian L.
   Hart, Robert
TI Nucleation of perovskite nanocrystals in a levitating liquid
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article; Proceedings Paper
CT 8th International Symposium on Crystallization in Glasses and Liquids
CY SEP 24-28, 2006
CL Jackson Hole, WY
ID YTTRIUM ALUMINOSILICATE GLASSES; SILICATE-GLASSES; STRUCTURAL ROLE;
   AL-27; CERAMICS; ALUMINA; PHASE; SI-29; NMR
AB Containerless liquid-phase processing methods were used to synthesize two glasses, both containing alumina (A), yttria (Y), and lanthana (L), and one containing similar to 20 mole% silica (S) as well. In both materials, denoted AYL and AYLS, alumina is the dominant component (> 50 mole%), and the lanthana:yttria ratio is similar to 2:1. A variety of experimental techniques, e.g. X-ray diffraction, high-field Al-27 magic angle spinning-nuclear magnetic resonance (MAS-NMR), differential scanning calorimetry, and neutron diffraction, were used to analyze both the structure of the amorphous phases resulting from liquid-phase processing and subsequent thermal treatments, and the thermodynamic properties of the as-made and heat-treated materials. The results of the experiments on these glasses and liquids have elucidated the nature of the transitions occurring between the glass transition and crystalline regimes, and have enabled the synthesis of a novel class of alumina-based nanomaterials.
C1 Containerless Res Inc, Evanston, IL 60202 USA.
   SUNY Stony Brook, Dept Geosci, Stony Brook, NY 11794 USA.
   Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
RP Tangeman, JA (reprint author), Containerless Res Inc, Evanston, IL 60202 USA.
EM tangeman@containerless.com
NR 20
TC 8
Z9 8
U1 1
U2 15
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAR
PY 2007
VL 90
IS 3
BP 758
EP 762
DI 10.1111/j.1551-2916.2007.01489.x
PG 5
WC Materials Science, Ceramics
SC Materials Science
GA 143KM
UT WOS:000244720100014
ER

PT J
AU Yu, HH
   Shrotriya, P
   Gao, YF
   Kim, KS
AF Yu, H. H.
   Shrotriya, P.
   Gao, Y. F.
   Kim, K.-S.
TI Micro-plasticity of surface steps under adhesive contact: Part I -
   Surface yielding controlled by single-dislocation nucleation
SO JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
LA English
DT Article
DE contact mechanics; surface micro-plasticity; dislocation model; surface
   tensile layer formation; surface step
ID STRAIN GRADIENT PLASTICITY; CONSERVATION LAWS; ASPERITY CONTACTS;
   CRACK-TIP; SLIP; ENERGY; INTENSITY; FRICTION; SPHERES; SOLIDS
AB Mechanics of nano- and meso-scale contacts of rough surfaces is of fundamental importance in understanding deformation and failure mechanisms of a solid surface, and in engineering fabrication and reliability of small surface structures. We present a micro-mechanical dislocation model of contact-induced deformation of a surface step or ledge, as a unit process model to construct a mesoscale model of plastic deformations near and at a rough surface. This paper (Part 1) considers onset of contact-induced surface yielding controlled by single-dislocation nucleation from a surface step. The Stroh formalism of anisotropic elasticity and conservation integrals are used to evaluate the driving force on the dislocation. The driving force together with a dislocation nucleation criterion is used to construct a contact-strength map of a surface step in terms of contact pressure, step height, surface adhesion and lattice resistance. Atomistic simulations of atomic surface-step indentation on a gold (100) surface have been also carried out with the embedded atom method. As predicted by the continuum dislocation model, the atomistic simulations also indicate that surface adhesion plays a significant role in dislocation nucleation processes. Instabilities due to adhesion and dislocation nucleation are evident. The atomistic simulation is used to calibrate the continuum dislocation nucleation criterion, while the continuum dislocation modeling captures the dislocation energetics in the inhomogeneous stress field of the surface-step under contact loading. Results show that dislocations in certain slip planes can be easily nucleated but will stay in equilibrium positions very to the surface step, while dislocations in some other slip planes easily move away from the surface into the bulk. This phenomenon is called contact-induced near-surface dislocation segregation. As a consequence, we predict the existence of a thin tensile-stress sub-layer adjacent to the surface within the boundary layer of near-surface plastic deformation. In the companion paper (Part II), we analyze the surface hardening behavior caused by multiple dislocations. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Brown Univ, Div Engn, Providence, RI 02912 USA.
   CUNY City Coll, Dept Mech Engn, New York, NY 10031 USA.
   Iowa State Univ Sci & Technol, Dept Mech Engn, Ames, IA 50011 USA.
   Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Comp Sci & Math, Oak Ridge, TN 37831 USA.
RP Kim, KS (reprint author), Brown Univ, Div Engn, Providence, RI 02912 USA.
EM Kyung-Suk_Kim@brown.edu
RI Gao, Yanfei/F-9034-2010; Shrotriya, Pranav/F-5960-2011
OI Gao, Yanfei/0000-0003-2082-857X; Shrotriya, Pranav/0000-0001-9263-4892
NR 31
TC 22
Z9 24
U1 1
U2 9
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-5096
J9 J MECH PHYS SOLIDS
JI J. Mech. Phys. Solids
PD MAR
PY 2007
VL 55
IS 3
BP 489
EP 516
DI 10.1016/j.jmps.2006.09.003
PG 28
WC Materials Science, Multidisciplinary; Mechanics; Physics, Condensed
   Matter
SC Materials Science; Mechanics; Physics
GA 184RW
UT WOS:000247660600003
ER

PT J
AU Roberts, BJ
   Mulholland, PJ
   Houser, AN
AF Roberts, Brian J.
   Mulholland, Patrick J.
   Houser, Jeffrey N.
TI Effects of upland disturbance and instream restoration on hydrodynamics
   and ammonium uptake in headwater streams
SO JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY
LA English
DT Article
DE catchment disturbance; stream restoration; hydrodynamics; transient
   storage; nutrient uptake; ammonium; coarse woody debris; military
   reservation
ID NUTRIENT ADDITION EXPERIMENTS; TRANSIENT STORAGE ZONES; BENTHIC
   ORGANIC-MATTER; MEDITERRANEAN STREAM; PHOSPHORUS UPTAKE; DEBRIS DAMS;
   PHOSPHATE RETENTION; PARTICULATE MATTER; RIVER RESTORATION; MOUNTAIN
   STREAMS
AB Delivery of water, sediments, nutrients, and organic matter to stream ecosystems is strongly influenced by the catchment of the stream and can be altered greatly by upland soil and vegetation disturbance. At the Fort Benning Military Installation (near Columbus, Georgia), spatial variability in intensity of military training results in a wide range of intensities of upland disturbance in stream catchments. A set of 8 streams in catchments spanning this upland disturbance gradient was selected for investigation of the impact of disturbance intensity on hydrodynamics and nutrient uptake. The size of transient storage zones and rates of NH4+ uptake in all study streams were among the lowest reported in the literature. Upland disturbance did not appear to influence stream hydrodynamics strongly, but it caused significant decreases in instream nutrient uptake. In October 2003, coarse woody debris (CWD) was added to (2)/(1) of the study streams (spanning the disturbance gradient) in an attempt to increase hydrodynamic and structural complexity, with the goals of enhancing biotic habitat and increasing nutrient uptake rates. CWD additions had positive short-term (within 1 mo) effects on hydrodynamic complexity (water velocity decreased and transient Storage zone cross-sectional area, relative size of the transient storage zone, fraction of the median travel time attributable to transient storage over a standardized length of 200 m, and the hydraulic retention factor increased) and nutrient uptake (NH4+ uptake rates increased). Our results suggest that water quality in streams with intense upland disturbances can be improved by enhancing instream biotic nutrient uptake capacity through measures such as restoring stream CWD.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Roberts, BJ (reprint author), US Geol Survey, Upper Midwest Environm Sci Ctr, 2630 Fanta Reed Rd, La Crosse, WI 54603 USA.
EM robertsbj@ornl.gov; mulhollandpj@ornl.gov; jhouser@usgs.gov
RI Mulholland, Patrick/C-3142-2012; 
OI Houser, Jeffrey/0000-0003-3295-3132
NR 79
TC 51
Z9 55
U1 7
U2 34
PU NORTH AMER BENTHOLOGICAL SOC
PI LAWRENCE
PA 1041 NEW HAMSPHIRE STREET, LAWRENCE, KS 66044 USA
SN 0887-3593
J9 J N AM BENTHOL SOC
JI J. N. Am. Benthol. Soc.
PD MAR
PY 2007
VL 26
IS 1
BP 38
EP 53
DI 10.1899/0887-3593(2007)26[38:EOUDAI]2.0.CO;2
PG 16
WC Ecology; Marine & Freshwater Biology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA 132RU
UT WOS:000243960700005
ER

PT J
AU Wu, JH
   Murphy, JB
   Emma, PJ
   Wang, XJ
   Watanabe, T
   Zhong, XM
AF Wu, Juhao
   Murphy, James B.
   Emma, Paul J.
   Wang, Xijie
   Watanabe, Takahiro
   Zhong, Xinming
TI Interplay of the chirps and chirped pulse compression in a high-gain
   seeded free-electron laser
SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
LA English
DT Article
ID AMPLIFIED SPONTANEOUS EMISSION
AB In a seeded high-gain free-electron laser (FEL), where a coherent laser pulse interacts with an ultrarelativistic electron beam, the seed laser pulse can be frequency chirped, and the electron beam can be energy chirped. Besides these two chirps, the FEL interaction introduces an intrinsic frequency chirp in the FEL even if the above-mentioned two chirps are absent. We examine the interplay of these three chirps. The problem is formulated as an initial value problem and solved via a Green function approach. Besides the chirp evolution, we also give analytical expressions for the pulse duration and bandwidth of the FEL, which remains fully longitudinally coherent in the high-gain exponential growth regime. Because the chirps are normally introduced for a final compression of the FEL pulse, some conceptual issues are discussed. We show that to get a short pulse duration, an energy chirp in the electron beam is important. (c) 2007 Optical Society of America.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
   Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China.
RP Wu, JH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
EM jhwu@SLAC.standford.edu
NR 15
TC 18
Z9 18
U1 1
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0740-3224
J9 J OPT SOC AM B
JI J. Opt. Soc. Am. B-Opt. Phys.
PD MAR
PY 2007
VL 24
IS 3
BP 484
EP 495
DI 10.1364/JOSAB.24.000484
PG 12
WC Optics
SC Optics
GA 141OI
UT WOS:000244587900008
ER

PT J
AU Hollis, KJ
   Bartram, BD
   Roedig, M
   Youchison, D
   Nygren, R
AF Hollis, Kendall J.
   Bartram, Brian D.
   Roedig, Manfred
   Youchison, Dennis
   Nygren, Richard
TI Plasma-sprayed beryllium on macro-roughened substrates for fusion
   reactor high heat flux applications
SO JOURNAL OF THERMAL SPRAY TECHNOLOGY
LA English
DT Article
DE beryllium; fusion reactor; low pressure plasma spray; substrate
   interaction; thermal properties
ID COATINGS
AB The development of beryllium first wall (FW) plasma facing components for future magnetic confinement fusion experiments, such as the International Thermonuclear Experimental Reactor (ITER), is a topic of great importance as research into long-term energy sources increases in urgency. The FW components must be able to survive the harsh plasma environment for extended periods of time. One proposed method for initial fabrication and repair of FW components is plasma spraying. Previous plasma-sprayed beryllium mock-up FW components had coating separation from the substrate at the edges. The present work describes experiments to produce beryllium mock-up FW components by plasma spray deposition on macro-roughened substrates. Experimental parameters, high heat flux testing and characterization results from the components are presented. No separation of the coating from the substrate was observed. Results of high heat flux testing under electron beam irradiation show performance exceeding that required for ITER FW components. Differences in macro-roughening features result in changes in the threshold absorbed heat flux before damage to the coatings occurs.
C1 Los Alamos Natl Lab, Div Mat Sci, Los Alamos, NM 87544 USA.
   Forschungszentrum Julich GmbH Assoc KFA, EURATOM, D-52425 Julich, Germany.
   Sandia Natl Labs, Albuquerque, NM USA.
RP Hollis, KJ (reprint author), Los Alamos Natl Lab, Div Mat Sci, POB 1663, Los Alamos, NM 87544 USA.
EM kjhollis@lanl.gov
OI Youchison, Dennis/0000-0002-7366-1710
NR 14
TC 3
Z9 3
U1 0
U2 4
PU ASM INTERNATIONAL
PI MATERIALS PARK
PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002
   USA
SN 1059-9630
J9 J THERM SPRAY TECHN
JI J. Therm. Spray Technol.
PD MAR
PY 2007
VL 16
IS 1
BP 96
EP 103
DI 10.1007/s11666-006-9011-6
PG 8
WC Materials Science, Coatings & Films
SC Materials Science
GA 173GY
UT WOS:000246862700010
ER

PT J
AU Kolasinski, RD
   Polk, JE
   Goebel, D
   Johnson, LK
AF Kolasinski, Robert D.
   Polk, James E.
   Goebel, Dan
   Johnson, Lee K.
TI Sputtering yield measurements at glancing incidence using a quartz
   crystal microbalance
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
LA English
DT Article
ID ION-BOMBARDMENT; RESONATORS; DEPENDENCE; ENERGIES; METALS; ANGLE
AB Low energy sputtering yields at grazing incidence have been investigated experimentally using a quartz crystal microbalance (QCM) technique. This method involved precoating the QCM with a thin film of the desired target material and relating the resonance frequency shift directly to mass loss during ion bombardment. A highly focused, low divergence ion beam provided a well defined incidence angle. Focusing most of the ion current on the center of the target allowed for higher sensitivity by taking into account the radial mass sensitivity of the QCM. Measurements of Mo, Cu, and W sputtering yields were taken for low energy (80-1000 eV) Xe+ and Ar+ to validate this experimental method. The target films ranged from 3.5 to 8.0 mu m in thickness and were deposited so that their crystal structure and density would. match those of the bulk material as closely as possible. These properties were characterized using a combination of scanning electron microscope imagery, profilometry, and x-ray diffraction. At normal incidence, the sputtering yields demonstrated satisfactory agreement with previously published work. At angles of incidence up to 40 degrees off normal, the data agreed well with predictions from existing theoretical models. Sputtering yields were found to increase by a factor of 1.6 over this range. The optimum angle for sputtering occurred at 55 degrees, after which the yields rapidly decreased. Measurements were taken up to 80 degrees from the surface normal. (c) 2007 American Vacuum Society.
C1 CALTECH, Dept Mech Engn, Pasadena, CA 91125 USA.
   CALTECH, Jet Prop Lab, NASA, Prop & Mat Engn Sect, Pasadena, CA 91109 USA.
RP Kolasinski, RD (reprint author), Sandia Natl Labs, POB 969,MS 916, Livermore, CA 94551 USA.
EM rkolasi@sandia.gov
NR 34
TC 9
Z9 9
U1 1
U2 10
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0734-2101
EI 1520-8559
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A
PD MAR-APR
PY 2007
VL 25
IS 2
BP 236
EP 245
DI 10.1116/1.2435375
PG 10
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 149TI
UT WOS:000245169200008
ER

PT J
AU Salvadori, MC
   Cattani, M
   Teixeira, FS
   Wiederkehr, RS
   Brown, IG
AF Salvadori, M. C.
   Cattani, M.
   Teixeira, F. S.
   Wiederkehr, R. S.
   Brown, I. G.
TI Anisotropic resistivity of thin films due to quantum electron scattering
   from anisotropic surface roughness
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
LA English
DT Article
ID ULTRATHIN METALLIC-FILMS; VACUUM-ARC; PLATINUM; CONDUCTIVITY; TRANSPORT;
   DEPOSITION; SRTIO3
AB Platinum thin films with thickness in the range of 0.4-12 nm were formed by filtered vacuum arc plasma deposition on a substrate with anisotropic roughness. The electrical resistivity was measured in directions parallel and perpendicular to the surface modulation as a function of film thickness, and the resistivity was found to be anisotropic with the degree of anisotropy increasing with decreasing film thickness. The very small thickness of the films calls for a quantum model for film resistivity, and it is shown that the measured resistivity can be interpreted as due to quantum electron scattering by the thin film anisotropic surface roughness. (c) 2007 American Vacuum Society.
C1 Univ Sao Paulo, Inst Phys, BR-05315970 Sao Paulo, Brazil.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Salvadori, MC (reprint author), Univ Sao Paulo, Inst Phys, CP 66318, BR-05315970 Sao Paulo, Brazil.
EM mcsalvadori@if.usp.br
RI Teixeira, Fernanda/A-9395-2013; Wiederkehr, Rodrigo Sergio/L-3739-2013;
   Cattani, Mauro/N-9749-2013; Salvadori, Maria Cecilia/A-9379-2013
NR 28
TC 2
Z9 2
U1 1
U2 1
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0734-2101
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A
PD MAR-APR
PY 2007
VL 25
IS 2
BP 330
EP 333
DI 10.1116/1.2699254
PG 4
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA 149TI
UT WOS:000245169200022
ER

PT J
AU Moutinho, HR
   Dhere, RG
   Jiang, CS
   Gessert, T
   Duda, A
   Young, M
   Metzger, WK
   Al-Jassim, MM
AF Moutinho, H. R.
   Dhere, R. G.
   Jiang, C.-S.
   Gessert, T.
   Duda, A.
   Young, M.
   Metzger, W. K.
   Al-Jassim, M. M.
TI Role of Cu on the electrical properties of CdTe/CdS solar cells: A
   cross-sectional conductive atomic force microscopy study
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
ID THIN-FILMS; BACK-CONTACT; CADMIUM TELLURIDE
AB The authors have studied the electrical properties of CdTe/CdS solar cells using conductive atomic force microscopy (C-AFM) applied to cross sections of the device. This novel technique uses the sharp tip of an atomic force microscope to contact the sample and apply an electrical potential, allowing the study of device properties with spatial resolution second to none. The CdTe/CdS/SnO2/substrate structures were treated with CdCl2 and etched with bromine/methanol or nitric/phosphoric acid solution. Finally, a Cu-containing back contact was applied to the surface of the device. The C-AFM analysis showed the existence of high-conductivity regions in CdTe close to the film surface, while the regions close to the junction with CdS remain resistive. The width of the conductive area in general varied laterally and, occasionally, reached the junction in some spots, causing microshunts in the devices. By analyzing the fracture of the cross sections, they observed that the conductive areas are concentrated at grain-boundary regions, whereas the interior of the grains is resistive. Analysis of samples without a Cu-containing back contact revealed that the conductive areas are caused by the diffusion of Cu from the back contact into the CdTe. The conductive layers directly affect the current transport in the device and impose a minimum CdTe thickness to prevent short-circuit problems. (c) 2007 American Vacuum Society.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Moutinho, HR (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM helio_moutinho@nrel.gov
RI jiang, chun-sheng/F-7839-2012
NR 21
TC 8
Z9 8
U1 0
U2 17
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAR-APR
PY 2007
VL 25
IS 2
BP 361
EP 367
DI 10.1116/1.2699923
PG 7
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
   Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 161VT
UT WOS:000246045300012
ER

PT J
AU Yang, X
   Gardner, WL
   Baylor, LR
   Cui, H
   Lowndes, DH
   Joy, DC
   Simpson, ML
AF Yang, X.
   Gardner, W. L.
   Baylor, L. R.
   Cui, H.
   Lowndes, D. H.
   Joy, D. C.
   Simpson, M. L.
TI Electron-beam focusing characteristics of double-gated carbon nanofiber
   based field emission sources
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article
ID EMITTER ARRAYS; FABRICATION; SILICON
AB Recently, vertically aligned carbon nanofiber based dual-gate field emission structures have been fabricated for use in parallel electron-beam lithography, and their electron-beam focus adjustment capability has been demonstrated. This article summarizes the results of a numerical investigation of device behavior due to geometry variation in an effort to better understand device characteristics and performance. The effect of electrode thickness on minimum beam diameter and depth of field (DOF) were investigated for axially symmetric structures using a two-dimensional simulation package. The results indicate both a decrease in minimum spot size from similar to 30 to similar to 20 nm, and an increase in DOF from similar to 1 to similar to 6 mu m when the focus electrode thickness is increased from 100 to 500 nm. The impact of misalignments of the focus electrode and the carbon nanofiber on the beam behavior was investigated with a three-dimensional simulation package. Results show that reasonably well-converged beams can be achieved even with considerable offset to either the focus electrode or carbon nanofiber, though large beam deflections are produced. In addition, the deflections due to these offsets appear to be linear. (c) 2007 American Vacuum Society.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Knoxville, TN 37996 USA.
RP Yang, X (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA.
EM baylorlr@ornl.gov
RI Simpson, Michael/A-8410-2011
OI Simpson, Michael/0000-0002-3933-3457
NR 23
TC 3
Z9 3
U1 0
U2 2
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAR-APR
PY 2007
VL 25
IS 2
BP 394
EP 399
DI 10.1116/1.2712201
PG 6
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
   Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 161VT
UT WOS:000246045300017
ER

PT J
AU Rahman, T
   Islam, SK
   Vijayaraghavan, R
   Gundman, T
   Eliza, SA
   Hossain, A
   Blalock, B
   Randolph, SJ
AF Rahman, T.
   Islam, S. K.
   Vijayaraghavan, R.
   Gundman, T.
   Eliza, S. A.
   Hossain, A.
   Blalock, B.
   Randolph, S. J.
TI Integration of a dose control circuit with a vertically aligned
   nanofiber field emission device
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 19th International Vacuum Nanoelectronics Conference
CY JUL 17-20, 2006
CL Guilin, PEOPLES R CHINA
SP AVS, Electron Devices Soc, IEEE, Minist Educ China, Natl Nat Sci Fdn China, Sun Yatsen Univ
ID BEAM ARRAY LITHOGRAPHY; CARBON
AB This article presents the integration of a dose control circuit (DCC) with vertically aligned carbon nanofiber (VACNF) field emission devices through a voltage boost up interface circuit for the implementation of the digital electrostatically focused e-beam array direct-write lithography concept. The VACNFs act as diodes with high turn on voltage (similar to 70 V). Commercially available complementary metal-oxide-semiconductor technology is not capable of handling such magnitude of voltages. The voltage boost up interface circuit described in this article offers an efficient technique to shift the voltage level to a level adequate to start the emission of electron from the tips of the VACNFs. The integration of the DCC with the VACNF emitters via a voltage boost up interface circuit presented in this article facilitates the operation of the VACNFs for etching in maskless lithography while providing precise control of emission. (c) 2007 American Vacuum Society.
C1 Univ Tennessee, Dept Elect & Comp Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Islam, SK (reprint author), Univ Tennessee, Dept Elect & Comp Engn, Knoxville, TN 37996 USA.
EM sislam@utk.edu
NR 10
TC 6
Z9 6
U1 0
U2 1
PU A V S AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAR-APR
PY 2007
VL 25
IS 2
BP 655
EP 660
DI 10.1116/1.2409958
PG 6
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
   Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA 161VT
UT WOS:000246045300073
ER

PT J
AU Perkins, J
   Clavijo, A
   Ortiz, JI
   Salo, TJ
   Holland, HJ
   Hindson, BJ
   McBride, MT
AF Perkins, Julie
   Clavijo, Alfonso
   Ortiz, Josue I.
   Salo, Timothy J.
   Holland, Hilary J.
   Hindson, Benjamin J.
   McBride, Mary T.
TI Toward a multiplexed serotyping immunoassay for foot-and-mouth disease
   virus
SO JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION
LA English
DT Article
DE foot-and-mouth disease; immunoassay; multiplexed; serotyping
ID LINKED-IMMUNOSORBENT-ASSAY; COMPLEMENT-FIXATION; DIAGNOSIS; ANTIBODIES;
   ELISA
AB Initial results demonstrating the feasibility of a multiplexed liquid array immunoassay for foot- and-mouth disease viral antigen detection and simultaneous serotype differentiation are presented. Serotype-specific antibodies from rabbit and guinea pig hyperimmunesera were isolated and prepared for use in a multiplexed, bead-based assay. The performance of all of the available antibodies as both capture and detector reagents was evaluated in the multiplexed system to establish a combination exhibiting the highest homotypic responses and lowest heterotypic reactions. The multiplexed assay was evaluated against inactivated cell culture supernatant samples of the same subtype as the virus used to raise the capture and detector antibodies. Distinct serotype differentiation was observed, except in the case of serotype SAT1. Subsequently, cell culture supernatant samples from a larger pool of viral subtypes were analyzed. Distinct serotype differentiation was obtained when analyzing cell culture supernatant samples from viral serotypes C, Asia, and SAT3, irrespective of the subtype. However, limitations of the current antibody pairs were realized in some inconclusive results obtained when analyzing samples from a broader range of O, A, and SAT2 subtypes. The results obtained in this initial study will be used to further optimize the assay using polyvalent or monoclonal antibodies and move toward the analysis of clinical samples.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Canadian Food Inspect Agcy, Natl Ctr Foreign Anim Dis, Winnipeg, MB, Canada.
RP McBride, MT (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94551 USA.
NR 16
TC 4
Z9 4
U1 0
U2 0
PU AMER ASSOC VETERINARY LABORATORY DIAGNOSTICIANS INC
PI TURLOCK
PA PO BOX 1522, TURLOCK, CA 95381 USA
SN 1040-6387
J9 J VET DIAGN INVEST
JI J. Vet. Diagn. Invest.
PD MAR
PY 2007
VL 19
IS 2
BP 180
EP 184
PG 5
WC Veterinary Sciences
SC Veterinary Sciences
GA 156NX
UT WOS:000245657300007
PM 17402613
ER

PT J
AU Valentine, GA
   Krier, DJ
   Perry, FV
   Heiken, G
AF Valentine, Greg A.
   Krier, Donathan J.
   Perry, Frank V.
   Heiken, Grant
TI Eruptive and geomorphic processes at the Lathrop Wells scoria cone
   volcano
SO JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
LA English
DT Article
DE scoria cone; lava; fallout deposit; Strombolian; violent Strombolian;
   geomorphology
ID RADIOACTIVE-WASTE REPOSITORY; LATE QUATERNARY VOLCANISM; YUCCA MOUNTAIN
   AREA; SOUTHERN NEVADA; CRATER FLAT; LAVA FLOWS; CINDER CONES; BASALTIC
   ERUPTION; DESERT PAVEMENTS; VULCANO ISLAND
AB The similar to 80 ka Lathrop Wells volcano (southern Nevada, U.S.A.) preserves evidence for a range of explosive processes and emplacement mechanisms of pyroclastic deposits and lava fields in a small-volume basaltic center. Early cone building by Strombolian bursts was accompanied by development of a fan-like lava field reaching similar to 800 m distance from the cone, built upon a gently sloping surface. Lava flows carried rafts of cone deposits, which provide indirect evidence for cone facies in lieu of direct exposures in the active quarry. Subsequent activity was of a violent Strombolian nature, with many episodes of sustained eruption columns up to a few km in height. These deposited layers of scoria lapilli and ash in different directions depending upon wind direction at the time of a given episode, reaching up to similar to 20 km from the vent, and also produced the bulk of the scoria cone. Lava effusion migrated from south to north around the eastern base of the cone as accumulation of lavas successively reversed the topography at the base of the cone. Late lavas were emplaced during violent Strornbolian activity and continued for some time after explosive eruptions had waned. Volumes of the eruptive products are: fallout -0.07 km(3), scoria cone -0.02 km(3), and lavas - 0.03 km(3). Shallow-derived xenolith concentrations suggest an upper bound on average conduit diameter of - 21 m in the uppermost 335 in beneath the volcano. The volcano was constructed over a period of at least seven months with cone building occurring only during part of that time, based upon analogy with historical eruptions. Post-eruptive geomorphic evolution varied for the three main surface types that were produced by volcanic activity: (1) scoria cone, (2) low relief surfaces (including lavas) with abundant pyroclastic material, and (3) lavas with little pyroclastic material. The role of these different initial textures must be accounted for in estimating relative ages of volcanic surfaces, and failure to account for this resulted in previous erroneous interpretation that the volcano's activity was polycyclic (eruptions separated by 1000s-10,000s of years). Lathrop Wells volcano provides an example of the wide range of eruptive processes that can occur with little change in major element composition; the variation in explosive and effusive processes, including their simultaneous occurrence, must result entirely from fluid dynamic, crystallization, and degassing processes in the ascending multiphase magma. The volcano also provides key analog information regarding processes that are important for volcanic risk assessment at the proposed Yucca Mountain radioactive waste repository, - 18 km north of the volcano. Published by Elsevier B.V.
C1 Los Alamos Natl Lab, Earth & Environm Sci Div, Los Alamos, NM 87545 USA.
RP Valentine, GA (reprint author), Los Alamos Natl Lab, Earth & Environm Sci Div, Mail Stop D462, Los Alamos, NM 87545 USA.
EM gav@lanl.gov
NR 71
TC 56
Z9 56
U1 1
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0377-0273
J9 J VOLCANOL GEOTH RES
JI J. Volcanol. Geotherm. Res.
PD MAR 1
PY 2007
VL 161
IS 1-2
BP 57
EP 80
DI 10.1016/j.jvolgeores.2006.11.003
PG 24
WC Geosciences, Multidisciplinary
SC Geology
GA 147QW
UT WOS:000245018500005
ER

PT J
AU Flippo, K
   Hegelich, BM
   Albright, BJ
   Yin, L
   Gautier, DC
   Letzring, S
   Schollmeier, M
   Schreiber, J
   Schulze, R
   Fernandez, JC
AF Flippo, K.
   Hegelich, B. M.
   Albright, B. J.
   Yin, L.
   Gautier, D. C.
   Letzring, S.
   Schollmeier, M.
   Schreiber, J.
   Schulze, R.
   Fernandez, J. C.
TI Laser-driven ion accelerators: Spectral control, monoenergetic ions and
   new acceleration mechanisms
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE break-out afterburner; enhanced TNSA; fast ignition fusion; femtosecond
   lasers; laser ion acceleration; laser-plasma interactions; monoenergetic
   ion beam; short-pulse lasers; target normal sheath acceleration
ID TARGETS; GENERATION; PLASMAS; BEAMS; TRANSPORT; ELECTRON; PROTONS;
   SURFACE; SOLIDS
AB Los Alamos National Laboratory short pulse experiments have shown using various target cleaning techniques Such that heavy ion beams of different charge states call be produced. Furthermore, by controlling the thickness of light ions on the rear of the target, monoenergetic ion pulses call be generated. The spectral shape of the accelerated particles call be controlled to yield a range of distributions, from Maxwellian to ones possessing a rnonoenergetic peak at high energy. The key lies in understanding and utilizing target surface chemistry. Careful monitoring and control of the surface properties and induction of reactions at different temperatures allows well defined source layers to be formed, which in turn lead to the desired energy spectra in the acceleration process. Theoretical considerations provide understanding of the process of monoenergetic ion production. In addition, numerical modeling has identified a new acceleration mechanism, the laser break-out afterburner that could potentially boost particle energies by up to two orders of magnitude for the same laser parameters. This mechanism may enable application of laser-accelerated ion beams to venues such as compact accelerators, tumor therapy, and ion fast ignition.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Tech Univ Darmstadt, D-64287 Darmstadt, Germany.
   LMU Muenchen, Munich, Germany.
RP Flippo, K (reprint author), Los Alamos Natl Lab, MS E526, Los Alamos, NM 87545 USA.
EM kflippo@lanl.gov
RI Flippo, Kirk/C-6872-2009; Fernandez, Juan/H-3268-2011; Schollmeier,
   Marius/H-1056-2012; 
OI Flippo, Kirk/0000-0002-4752-5141; Fernandez, Juan/0000-0002-1438-1815;
   Schollmeier, Marius/0000-0002-0683-022X; Albright,
   Brian/0000-0002-7789-6525; Yin, Lin/0000-0002-8978-5320; Schulze,
   Roland/0000-0002-6601-817X
NR 21
TC 70
Z9 70
U1 5
U2 22
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
J9 LASER PART BEAMS
JI Laser Part. Beams
PD MAR
PY 2007
VL 25
IS 1
BP 3
EP 8
DI 10.1017/S0263034607070012
PG 6
WC Physics, Applied
SC Physics
GA 149IK
UT WOS:000245140400002
ER

PT J
AU Filevich, J
   Grava, J
   Purvis, M
   Marconi, MC
   Rocca, JJ
   Nilsen, J
   Dunn, J
   Johnson, WR
AF Filevich, J.
   Grava, J.
   Purvis, M.
   Marconi, M. C.
   Rocca, J. J.
   Nilsen, J.
   Dunn, J.
   Johnson, W. R.
TI Multiply ionized carbon plasmas with index of refraction greater than
   one
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE anomalous index of refraction; interferometry; soft X-ray laser
ID X-RAY LASER; INTERFEROMETRY; NM; DIAGNOSTICS; GENERATION; MIRROR
AB For decades the analysis of interferometry have relied on the approximation that the index of refraction in plasmas is due solely to the free electrons. This general assumption makes the index of refraction always less than one. However, recent soft x-ray laser interferometry experiments with Aluminum plasmas at wavelengths of 14.7 nm and 13.9 nm have shown fringes that bend the opposite direction than would be expected when using that approximation. Analysis of the data demonstrated that this effect is due to bound electrons that contribute significantly to the index of refraction of multiply ionized plasmas, and that this should be encountered in other plasmas at different wavelengths. Recent studies of Silver and Tin plasmas using a 46.9 nm probe beam generated by a Ne-like Ar capillary discharge soft-ray laser identified plasmas with an index of refraction greater than one, as was predicted by computer calculations. In this paper we present new interferometric results obtained with Carbon plasmas at 46.9 nm probe wavelength that clearly show plasma regions with an index of refraction greater than one. Computations Suggest that in this case the phenomenon is due to the dominant contribution of bound electrons from doubly ionized carbon ions to the index of refraction. The results reaffirm that bound electrons can strongly influence the index of refraction Of numerous plasmas over a broad range of soft x-ray wavelengths.
C1 Colorado State Univ, NSF ERC Extreme Ultraviolet Sci & Technol, Ft Collins, CO 80523 USA.
   Lawrence Livermore Natl Lab, Livermore, CA USA.
   Univ Notre Dame, Notre Dame, IN 46556 USA.
RP Filevich, J (reprint author), Colorado State Univ, NSF ERC Extreme Ultraviolet Sci & Technol, 1320 Campus Delivery, Ft Collins, CO 80523 USA.
EM rage@engr.colostate.edu
NR 26
TC 12
Z9 12
U1 0
U2 4
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
EI 1469-803X
J9 LASER PART BEAMS
JI Laser Part. Beams
PD MAR
PY 2007
VL 25
IS 1
BP 47
EP 51
DI 10.1017/S0263034607070085
PG 5
WC Physics, Applied
SC Physics
GA 149IK
UT WOS:000245140400008
ER

PT J
AU Kuehl, T
   Ursescu, D
   Bagnoud, V
   Javorkova, D
   Rosmej, O
   Cassou, K
   Kazamias, S
   Klisnick, A
   Ros, D
   Nickles, P
   Zielbauer, B
   Dunn, J
   Neumayer, P
   Pert, G
AF Kuehl, Th.
   Ursescu, D.
   Bagnoud, V.
   Javorkova, D.
   Rosmej, O.
   Cassou, K.
   Kazamias, S.
   Klisnick, A.
   Ros, D.
   Nickles, P.
   Zielbauer, B.
   Dunn, J.
   Neumayer, P.
   Pert, G.
CA PHELIX Team
TI Optimization of the non-normal incidence, transient pumped plasma X-ray
   laser for laser spectroscopy and plasma diagnostics at the facility for
   antiproton and ion research (FAIR)
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE high power laser; laser spectroscopy; plasma diagnostics; X-ray laser
ID PHELIX LASER; GSI
AB Intense and stable laser operation with Ni-like Zr and Ag was demonstrated at pump energies between 2 J and 5 1 energy from the PHELIX pre-amplifier section. A novel single mirror focusing scheme for the TCE x-ray laser (XRL) has been successfully implemented by the LIXAM/MBI/GSI collaboration under different pump geometries. This shows potential for an extension to shorter XRL wavelength. Generation of high quality XRL beams for XRL spectroscopy of highly charged ions is an important issue within the scientific program of PHELIX. Long range perspective is the study of nuclear properties of radioactive isotopes within the FAIR project.
C1 GSI Darmstadt, D-6100 Darmstadt, Germany.
   Johannes Gutenberg Univ Mainz, D-6500 Mainz, Germany.
   Univ Paris Sud, LIXAM, Paris, France.
   MBI, Berlin, Germany.
   Lawrence Livermore Natl Lab, Livermore, CA USA.
   Univ York, York YO10 5DD, N Yorkshire, England.
RP Kuehl, T (reprint author), GSI Darmstadt, D-6100 Darmstadt, Germany.
EM t.kuehl@gsi.ed
RI Klisnick, Annie/C-5532-2008; Ursescu, Daniel/F-2216-2010; Klisnick,
   Annie/F-1152-2011; Kuhl, Thomas/C-2243-2012; Bagnoud,
   Vincent/K-4266-2015
OI Ursescu, Daniel/0000-0002-0612-670X; Kuhl, Thomas/0000-0001-6306-4579;
   Bagnoud, Vincent/0000-0003-1512-4578
NR 9
TC 23
Z9 23
U1 0
U2 2
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
EI 1469-803X
J9 LASER PART BEAMS
JI Laser Part. Beams
PD MAR
PY 2007
VL 25
IS 1
BP 93
EP 97
DI 10.1017/S0263034607070152
PG 5
WC Physics, Applied
SC Physics
GA 149IK
UT WOS:000245140400014
ER

PT J
AU Sizyuk, V
   Hassanein, A
   Sizyuk, T
AF Sizyuk, V.
   Hassanein, A.
   Sizyuk, T.
TI Hollow laser self-confined plasma for extreme ultraviolet lithography
   and other applications
SO LASER AND PARTICLE BEAMS
LA English
DT Article
DE extreme ultraviolet; hollow lasers; laser plasmas; plasma device
   modeling
ID HEIGHTS INITIAL SIMULATION; GENERATED MAGNETIC-FIELDS; X-RAY SOURCE; EUV
   LITHOGRAPHY; RADIATION TRANSPORT; PINCH PLASMA; HYDRODYNAMICS; DEVICES;
   TARGETS; SYSTEM
AB Laser-produced plasma (LPP) devices are being developed as a light source for the extreme ultraviolet (EUV) lithography applications. One concern Of Such devices is to increase the conversion efficiency of laser energy to EUV light. A new idea based on the initiation and confinement of cumulative plasma jet inside a hollow laser beam is developed and simulated. The integrated computer model (HEIGHTS) Was used to simulate the plasma behavior and the EUV radiation output in the LPP devices. The model takes into account plasma heat conduction and magnetohydrodynamic processes in a two-temperature approximation, as well as detailed photon radiation transport in 3D Monte Carlo model. The model employs cylindrical 2D version of a total variation-diminishing scheme (for the plasma hydrodynamics) and an implicit scheme with the sparse matrix linear solver (to describe heat conduction). Numerical simulations showed that the EUV efficiency of the proposed hollow-beam LPP device to be higher than the Current standard devices.
C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA.
RP Sizyuk, V (reprint author), Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave,Bld 308, Argonne, IL 60439 USA.
EM sizyuk@anl.gov
NR 61
TC 34
Z9 34
U1 0
U2 2
PU CAMBRIDGE UNIV PRESS
PI NEW YORK
PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA
SN 0263-0346
J9 LASER PART BEAMS
JI Laser Part. Beams
PD MAR
PY 2007
VL 25
IS 1
BP 143
EP 154
DI 10.1017/S026303460707019X
PG 12
WC Physics, Applied
SC Physics
GA 149IK
UT WOS:000245140400020
ER

PT J
AU Hendrickson, B
AF Hendrickson, Bruce
TI Latent semantic analysis and Fiedler retrieval
SO LINEAR ALGEBRA AND ITS APPLICATIONS
LA English
DT Article
DE information retrieval; latent semantic analysis; Laplacian matrix;
   eigenvector
ID INFORMATION-RETRIEVAL; MATRICES; GRAPHS
AB Latent semantic analysis (LSA) is a method for information retrieval and processing which is based upon the singular value decomposition. It has a geometric interpretation in which objects (e.g. documents and keywords) are placed in a low-dimensional geometric space. In this paper, we derive an alternative algebraic/geometric method for placing objects in space to facilitate information analysis. We show that Our method is closely related to LSA, and essentially equivalent for particular choices of scaling parameters. We then show that Our approach supports a number of generalizations and extensions that existing LSA approaches cannot handle. (c) 2006 Elsevier Inc. All rights reserved.
C1 Sandia Natl Labs, Discrete Algoithms & Math Dept, Albuquerque, NM 87185 USA.
RP Hendrickson, B (reprint author), Sandia Natl Labs, Discrete Algoithms & Math Dept, Albuquerque, NM 87185 USA.
EM bah@sandia.gov
NR 21
TC 5
Z9 6
U1 0
U2 3
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0024-3795
J9 LINEAR ALGEBRA APPL
JI Linear Alg. Appl.
PD MAR 1
PY 2007
VL 421
IS 2-3
BP 345
EP 355
DI 10.1016/j.laa.2006.09.026
PG 11
WC Mathematics, Applied; Mathematics
SC Mathematics
GA 137KQ
UT WOS:000244291900014
ER

PT J
AU Hancock, JM
   Adams, NC
   Aidinis, V
   Blake, A
   Blake, JA
   Bogue, M
   Brown, SDM
   Chesler, E
   Davidson, D
   Duran, C
   Eppig, JT
   Gailus-Durner, V
   Gates, H
   Gkoutos, GV
   Greenaway, S
   De Angelis, MH
   Kollias, G
   Leblanc, S
   Lee, K
   Lengger, C
   Maier, H
   Mallon, AM
   Masuya, H
   Melvin, DG
   Muller, W
   Parkinson, H
   Proctor, G
   Reuveni, E
   Schofield, P
   Shukla, A
   Smith, C
   Toyoda, T
   Vasseur, L
   Wakana, S
   Walling, A
   White, J
   Wood, J
   Zouberakis, M
AF Hancock, John M.
   Adams, Niels C.
   Aidinis, Vassilis
   Blake, Andrew
   Blake, Judith A.
   Bogue, Molly
   Brown, Steve D. M.
   Chesler, Elissa
   Davidson, Duncan
   Duran, Christopher
   Eppig, Janan T.
   Gailus-Durner, Valerie
   Gates, Hilary
   Gkoutos, Georgios V.
   Greenaway, Simon
   De Angelis, Martin Hrabe
   Kollias, George
   Leblanc, Sophie
   Lee, Kirsty
   Lengger, Christoph
   Maier, Holger
   Mallon, Ann-Marie
   Masuya, Hiroshi
   Melvin, David G.
   Mueller, Werner
   Parkinson, Helen
   Proctor, Glenn
   Reuveni, Eli
   Schofield, Paul
   Shukla, Aadya
   Smith, Cynthia
   Toyoda, Tetsuro
   Vasseur, Laurent
   Wakana, Shigeharu
   Walling, Alison
   White, Jacqui
   Wood, Joe
   Zouberakis, Michalis
CA Mouse Phenotype Database Integrati
TI Integration of mouse phenome data resources
SO MAMMALIAN GENOME
LA English
DT Article
ID GENOME; INFORMATION; ONTOLOGIES; SCREENS; EMPRESS; MGD
AB Understanding the functions encoded in the mouse genome will be central to an understanding of the genetic basis of human disease. To achieve this it will be essential to be able to characterize the phenotypic consequences of variation and alterations in individual genes. Data on the phenotypes of mouse strains are currently held in a number of different forms (detailed descriptions of mouse lines, first-line phenotyping data on novel mutations, data on the normal features of inbred lines) at many sites worldwide. For the most efficient use of these data sets, we have initiated a process to develop standards for the description of phenotypes (using ontologies) and file formats for the description of phenotyping protocols and phenotype data sets. This process is ongoing and needs to be supported by the wider mouse genetics and phenotyping communities to succeed. We invite interested parties to contact us as we develop this process further.
C1 MRC, Mammalian Genet Unit, Didcot OX11 0RD, Oxon, England.
   Wellcome Trust Sanger Inst, Cambridge CB10 1SA, England.
   BSRC Fleming, Athens 16672, Greece.
   Jackson Lab, Bar Harbor, ME 04609 USA.
   Oak Ridge Natl Lab, Mammalian Genet & Genom Grp, Biosci Div, Oak Ridge, TN 37831 USA.
   MRC Human Genet Unit, Edinburgh EH4 2XU, Midlothian, Scotland.
   GSF Natl Res Ctr Environm & Hlth, Inst Expt Genet, D-85764 Neuherberg, Germany.
   Univ Cambridge, Dept Genet, Cambridge CB2 3EH, England.
   Inst Clin Souris, F-67404 Illkirch Graffenstaden, France.
   RIKEN, Genom Sci Ctr, Tsukuba, Ibaraki, Japan.
   Helmholtz Zentrum Infektionsforsch GmbH, D-38124 Braunschweig, Germany.
   Univ Manchester, Fac Life Sci, Manchester M13 9PT, Lancs, England.
   European Bioinformat Inst, Cambridge CB10 1SD, England.
   EMBL Monterotondo Outstn, Mouse Biol Unit, I-00016 Monterotondo, Italy.
   Univ Cambridge, Dept Physiol Dev & Neurosci, Cambridge CB2 3DY, England.
   Univ Oxford, Comp Lab, Oxford OX1 3QD, England.
   MRC, Mary Lyon Ctr, Didcot OX11 0RD, Oxon, England.
RP Hancock, JM (reprint author), MRC, Mammalian Genet Unit, Didcot OX11 0RD, Oxon, England.
RI Hancock, John/A-2442-2009; Smith, Cynthia/A-5646-2009; Kollias,
   George/A-7079-2012; Hrabe de Angelis, Martin/F-5531-2012; Lengger,
   Christoph/M-9831-2014; Gailus-Durner, Valerie/M-7337-2014; Muller,
   Werner/B-9044-2008; Masuya, Hiroshi/A-6442-2016
OI Hancock, John/0000-0003-2991-2217; Smith, Cynthia/0000-0003-3691-0324;
   Blake, Judith/0000-0001-8522-334X; Kollias, George/0000-0003-1867-3150;
   Hrabe de Angelis, Martin/0000-0002-7898-2353; Muller,
   Werner/0000-0002-1297-9725; Masuya, Hiroshi/0000-0002-3392-466X
NR 17
TC 35
Z9 38
U1 0
U2 2
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 0938-8990
J9 MAMM GENOME
JI Mamm. Genome
PD MAR
PY 2007
VL 18
IS 3
BP 157
EP 163
DI 10.1007/s00335-007-9004-x
PG 7
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
   Genetics & Heredity
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
   Genetics & Heredity
GA 169TI
UT WOS:000246614200003
ER

PT J
AU Hall, LC
   Okihiro, M
   Johnson, ML
   Teh, SJ
AF Hall, L. C.
   Okihiro, M.
   Johnson, M. L.
   Teh, S. J.
TI Surflan (TM) and oryzalin impair reproduction in the teleost medaka
   (Oryzias latipes)
SO MARINE ENVIRONMENTAL RESEARCH
LA English
DT Article
DE endocrine-disruptor; medaka; herbicides; ecotoxicology; toxicity;
   Surflan; oryzalin
ID MINNOW PIMEPHALES-PROMELAS; RAINBOW-TROUT; SEXUAL-DIFFERENTIATION; LIFE
   STAGES; TESTIS-OVA; VITELLOGENIN; ESTROGEN; CYCLE; FISH;
   17-BETA-ESTRADIOL
AB We conducted studies to determine if the xenoestrogens Surflan (TM) and its active ingredient oryzalin, affect indices of reproductive fitness in medaka (Oryzias latipes). Oryzalin (0.5, 0.25 mg/l) or Surflan (TM) (2.0 mu l/l) and oryzalin (0.5 mg/l) significantly increased the mean number of non-fertilized eggs produced by treated females paired with untreated males, or by untreated females paired with treated males. Oryzalin (1.0, 0.5, 0.25 mg/l) and Surflan (TM) (3.8, 2.0, 1.0 mu l/l) significantly affected the time to hatch of eggs from treated females paired with untreated males, and from untreated females paired with treated males. Surflan (TM) (3.8, 2.0, 1.0 mu l/l) induced intersex lesions in 80-100% of males. Oryzalin-exposed males exhibited a significant increase in the incidence of necrotic spermatids and necrotic spermatogonia, while oryzalin-exposed females had significantly fewer immature oocytes and an increase in the occurrence of hyperplastic ovaries. Our results indicate that Surflan (TM) and oryzalin affect both reproduction and gonadal histology in mate and female medaka. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Lawrence Livermore Natl Lab, Environm Restorat Div, Livermore, CA 94550 USA.
   Calif Dept Fish & Game, Oceanside Fish Pathol Lab, Oceanside, CA 92056 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
RP Hall, LC (reprint author), Lawrence Livermore Natl Lab, Environm Restorat Div, POB 808,L-542, Livermore, CA 94550 USA.
EM hall13@llnl.gov
NR 49
TC 6
Z9 6
U1 0
U2 6
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-1136
J9 MAR ENVIRON RES
JI Mar. Environ. Res.
PD MAR
PY 2007
VL 63
IS 2
BP 115
EP 131
DI 10.1016/j.marenvres.2006.07.003
PG 17
WC Environmental Sciences; Marine & Freshwater Biology; Toxicology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology;
   Toxicology
GA 133IP
UT WOS:000244006900002
PM 16979231
ER

PT J
AU Hackenberg, RE
   Shiflet, GJ
AF Hackenberg, R. E.
   Shiflet, G. J.
TI A serial sectioning technique for evaluating grain and twin boundary
   precipitate growth kinetics in bulk specimens
SO MATERIALS CHARACTERIZATION
LA English
DT Article
DE steel; bainite; growth kinetics; tomography
ID FE-C-MO; FERRITE ALLOTRIOMORPHS; ALLOY-STEELS; AUSTENITE; TEMPERATURE;
   BAY; TRANSFORMATION; DECOMPOSITION; SIZE
AB A new measurement technique for the growth kinetics of both grain boundary and twin boundary bainite precipitates in bulk specimens is demonstrated. The key advance is the use of coarse-scale serial sectioning to determine the angle made by the grain or twin boundary to the plane of polish, so an explicit stereological correction to the precipitate thickness can be made. This technique is applied to the thickening of bainite at the bay temperature of Fe-0.24C-4Mo, where grain boundary bainite growth kinetics had been measured previously in much thinner specimens using the "bamboo-specimen" method developed by Bradley et al. Several key assumptions implicit in the "bamboo-specimen" method are critically examined using the data obtained from this new technique. Twin boundary bainite growth thickening kinetics, which cannot be obtained using the bamboo method, are also obtained for the first time, and are measured in the same steel. (c) 2006 Elsevier Inc. All rights reserved.
C1 Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
   Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
RP Shiflet, GJ (reprint author), Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
EM gjs@cms.mail.virginia.edu
OI Hackenberg, Robert/0000-0002-0380-5723
NR 23
TC 2
Z9 2
U1 0
U2 2
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 1044-5803
J9 MATER CHARACT
JI Mater. Charact.
PD MAR
PY 2007
VL 58
IS 3
BP 211
EP 219
DI 10.1016/j.matchar.2005.08.006
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Materials Science, Characterization & Testing
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 144LJ
UT WOS:000244797200001
ER

PT J
AU Trimm, M
AF Trimm, Marvin
TI Does the NDT industry have an identity?
SO MATERIALS EVALUATION
LA English
DT Editorial Material
C1 Savannah River Natl Lab, Aiken, SC 29801 USA.
RP Trimm, M (reprint author), Savannah River Natl Lab, 730-A Room 102, Aiken, SC 29801 USA.
EM marvin.trimm@smk.doe.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC NONDESTRUCTIVE TEST
PI COLUMBUS
PA 1711 ARLINGATE LANE PO BOX 28518, COLUMBUS, OH 43228-0518 USA
SN 0025-5327
J9 MATER EVAL
JI Mater. Eval.
PD MAR
PY 2007
VL 65
IS 3
BP 263
EP 263
PG 1
WC Materials Science, Characterization & Testing
SC Materials Science
GA 141TP
UT WOS:000244602000001
ER

PT J
AU Peng, J
   Wang, H
   Wu, MM
   Chen, DF
   Kiyanagi, R
   Fieramosca, JS
   Short, S
   Jorgensen, J
   Hu, Z
AF Peng, J.
   Wang, H.
   Wu, M. M.
   Chen, D. F.
   Kiyanagi, R.
   Fieramosca, J. S.
   Short, S.
   Jorgensen, J.
   Hu, Z.
TI Structure and thermal expansion properties of R2-xNdxMo4O15 solid
   solutions (R=Ho, Dy, 0 <= x <= 0.6)
SO MATERIALS TECHNOLOGY
LA English
DT Review
DE thermal expansion; X-ray diffraction; rare earth molybdates; crystal
   structure
ID PHASE-TRANSITIONS; OXYGEN MIGRATION; ZRW2O8; TEMPERATURE; DIFFRACTION;
   TUNGSTATE; POLYMORPHS; ZRV2O7; FAMILY; TM
AB R2-xNdxMo4O15 solid solutions (R=Ho, Dy, 0 <= x <= 0.6) were successfully prepared and their structures investigated by X-ray powder diffraction, in comparison with those of solid solutions with R=Er and Y. All these molybdates crystallise in the monoclinic space group P2(1)/c. The maximum values of x for R=Er, Y, Ho and Dy were found to be 0.6, 0.4, 0.4 and 0.0 respectively. The thermal expansion properties of R2Mo4O15 and R1.8Nd0.2Mo4O15 (R=Er, Y, Ho, Dy) were studied using high temperature X-ray diffraction in the range 25-500 degrees C. Nd substitution increased the thermal expansion coefficient (TEC); for x=0.2, the TEC for R1.8Nd0.2Mo4O15 increases by 27.9, 6.0 and 3.2% for R=Er, Y and Ho respectively. Bond length analysis shows that the weak Mo2 center dot center dot center dot O14 bond is likely to control the thermal expansion behaviour of these molybdates.
C1 Grad Univ Chinese Acad Sci, Coll Chem & Chem Engn, Beijing 100049, Peoples R China.
   China Inst Atom Energy, Beijing 102413, Peoples R China.
   Argonne Natl Lab, IPNS MSD, Argonne, IL 60439 USA.
RP Hu, Z (reprint author), Grad Univ Chinese Acad Sci, Coll Chem & Chem Engn, Beijing 100049, Peoples R China.
EM huzq@gucas.ac.cn
NR 29
TC 1
Z9 1
U1 1
U2 2
PU MANEY PUBLISHING
PI LEEDS
PA STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND
SN 1066-7857
EI 1753-5557
J9 MATER TECHNOL
JI Mater. Technol.
PD MAR
PY 2007
VL 22
IS 1
BP 33
EP 37
DI 10.1179/175355507X196484
PG 5
WC Materials Science, Multidisciplinary
SC Materials Science
GA 193WU
UT WOS:000248306700006
ER

PT J
AU Tanigawa, H
   Sawahata, A
   Sokolov, MA
   Enomoto, M
   Klueh, RL
   Kohyama, A
AF Tanigawa, Hiroyasu
   Sawahata, Atsushi
   Sokolov, Mikhail A.
   Enomoto, Masato
   Klueh, Ronald L.
   Kohyama, Akira
TI Effects of inclusions on fracture toughness of reduced-activation
   ferritic/martensitic F82H-IEA steels
SO MATERIALS TRANSACTIONS
LA English
DT Article
DE reduced-activation ferritic/martensitic steels; neutron irradiated;
   inclusion; Ta oxide; toughness; master curve
AB Reduced activation ferritic/martensitic steels (RAFs) are recognized as the primary candidate structural materials for fusion blanket systems. F82H is the RAF which has been developed and studied in Japan, and F82H-IEA heat, one of the world's first 5 ton heats of RAF, was provided and evaluated in various countries as a part of the IEA collaboration on fusion materials development. A problem with the steel is that some fracture toughness values obtained by IT type of compact tension (ITCT) specimens showed very low values in ductile brittle transition region. There might be several reasons for the scatter, and one of them could be related to the microstructural inhomogeneity of F82H-IEA. In the present study, this possibility was investigated focusing on inclusions formed in a plate of F82H-IEA steel by scanning (SEM) and transmission electron microscopy (TEM) equipped with EDS.
   The plates examined in this study were obtained from F82H-IEA heat no. 9753, nominally Fe-7.5Cr-2W-0.15V-0.02Ta-0.1C, in mass%. Analyses by SEM and TEM for the plates revealed that Ta does not form MX precipitates, but instead, it forms composite Al2O3 - Ta(V,Ti)O oxide, or single phase Ta(V)O oxide. The composite inclusions are rather dominant in the plate obtained from the bottom of the ingot, but not in the plate from the middle of the ingot. SEM observations also revealed that composite oxide tended to be observed at the crack-initiation site. These results suggest that the scatter of toughness values may be correlated with this microstructural inhomogeneity.
C1 Japan Atom Energy Agcy, Naka Fus Inst, Tokai, Ibaraki 3191195, Japan.
   Ibaraki Univ, Mat Engn Div, Hitachi, Ibaraki 3168511, Japan.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan.
RP Tanigawa, H (reprint author), Japan Atom Energy Agcy, Naka Fus Inst, Tokai, Ibaraki 3191195, Japan.
EM tanigawa.hiroyasu@jaea.go.jp
NR 5
TC 12
Z9 12
U1 0
U2 3
PU JAPAN INST METALS
PI SENDAI
PA 1-14-32, ICHIBANCHO, AOBA-KU, SENDAI, 980-8544, JAPAN
SN 1345-9678
EI 1347-5320
J9 MATER TRANS
JI Mater. Trans.
PD MAR
PY 2007
VL 48
IS 3
BP 570
EP 573
DI 10.2320/matertrans.48.570
PG 4
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 156PV
UT WOS:000245662400051
ER

PT J
AU Ratzel, AC
AF Ratzel, Arthur C., III
TI Before microsystems can fulfill their promise, engineers have to
   understand that the macroscale rules don't necessarily apply.
SO MECHANICAL ENGINEERING
LA English
DT Article
C1 Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
RP Ratzel, AC (reprint author), Sandia Natl Labs, Engn Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASME-AMER SOC MECHANICAL ENG
PI NEW YORK
PA THREE PARK AVE, NEW YORK, NY 10016-5990 USA
SN 0025-6501
J9 MECH ENG
JI Mech. Eng.
PD MAR
PY 2007
VL 129
IS 3
BP 24
EP 29
PG 6
WC Engineering, Mechanical
SC Engineering
GA 146BD
UT WOS:000244908600030
ER

PT J
AU Basu, A
   Meltzer, D
AF Basu, Anirban
   Meltzer, David
TI Value of information on preference heterogeneity and individualized care
SO MEDICAL DECISION MAKING
LA English
DT Article
DE preferences; value of information; individualization of care; quality of
   life; prostate cancer
ID PATIENT-PHYSICIAN COMMUNICATION; LOCALIZED PROSTATE-CANCER; SHARED
   DECISION-MAKING; AIDS; QUALITY; TRIAL; RISK
AB Background. Cost-effectiveness analysis traditionally focuses on identifying when treatments are cost-effective based on their average benefits and costs in the population. However, there may be considerable value in identifying when treatments are cost-effective for individual patients given their preferences or other personal attributes. Objectives. To present a theoretical framework to assess the potential value of identifying cost-effective treatments for individual patients given their preferences and to compare the value of individualized treatment decisions with the value of treatment decisions based on traditional population-level cost-effectiveness analysis. Methods. The authors calculate the expected value of individualized care (EVIC), which represents the potential value of providing physicians information on the preferences of individual patients, such as quality-of-life (QOL) weights, so as to make individualized treatment decisions. They also show how EVIC varies with insurance structures that do not internalize relative costs of treatments. They illustrate this theory using an example in which physicians make treatment choices for 65-year-old prostate cancer patients. Results. The value of identifying cost-effective treatments at the individual level for 65-year-old prostate cancer patients in the United States is about $70 million annually. This is more than 100 times the $0.7 million annual value of identifying the cost-effective treatment on average for this population. However, failure to internalize costs almost eliminates the value of individualized care: Conclusions. The value of individualizing care can be far greater than the value of improved decision making at the group level. However, this can vary immensely with insurance. EVIC can provide a guide as to when the high value of individualized care may make population-level decision making especially at risk of providing poor guidance for coverage decisions. Future studies of the value of individualized care should also consider baseline levels of individualization of care.
C1 Univ Chicago, Dept Med, Gen Internal Med Sect, Ctr Hlth & Social Sci, Chicago, IL 60637 USA.
   Argonne Natl Lab, Decis & Informat Sci Div, Chicago, IL USA.
   Univ Chicago, Harris Sch Publ Policy Studies, Dept Econ, Dept Med,Sect Gen Internal Med, Chicago, IL 60637 USA.
RP Basu, A (reprint author), Univ Chicago, Dept Med, Gen Internal Med Sect, Ctr Hlth & Social Sci, 5841 S Maryland Ave,MC 2007,AMD B201, Chicago, IL 60637 USA.
EM abasu@medicine.bsd.uchicago.edu
RI Meltzer, David/C-2926-2009
OI Meltzer, David/0000-0003-2790-7393
NR 22
TC 53
Z9 53
U1 0
U2 2
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 0272-989X
J9 MED DECIS MAKING
JI Med. Decis. Mak.
PD MAR-APR
PY 2007
VL 27
IS 2
BP 112
EP 127
DI 10.1177/0272989X06297393
PG 16
WC Health Care Sciences & Services; Medical Informatics
SC Health Care Sciences & Services; Medical Informatics
GA 154ZL
UT WOS:000245547200005
PM 17409362
ER

PT J
AU Shiba, Y
   Paradise, EM
   Kirby, J
   Ro, DK
   Keasing, JD
AF Shiba, Yoichiro
   Paradise, Eric M.
   Kirby, James
   Ro, Dae-Kyun
   Keasing, Jay D.
TI Engineering of the pyruvate dehydrogenase bypass in Saccharomyces
   cerevisiae for high-level production of isoprenoids
SO METABOLIC ENGINEERING
LA English
DT Article
DE acetaldehyde dehydrogenase; acetyl-CoA synthetase; amorphadiene;
   isoprenoids
ID COENZYME-A SYNTHETASE; ACETYL-COA SYNTHETASE; ESCHERICHIA-COLI;
   SALMONELLA-ENTERICA; GENE; GLUCOSE; PROTEIN; ENZYME; YEAST;
   SESQUITERPENES
AB Amorphadiene, a sesquiterpene precursor to the anti-malarial drug artemisinin, is synthesized by the cyclization of farnesyl pyrophosphate (FPP). Saccharomyces cerevisiae produces FPP through the mevalonate pathway using acetyl-CoA as a starting compound. In order to enhance the supply of acetyl-CoA to the mevalonate pathway and achieve high-level production of amorphadiene, we engineered the pyruvate dehydrogenase bypass in S. cerevisiae. Overproduction of acetaldehyde dehydrogenase and introduction of a Salmonella enterica acetyl-CoA synthetase variant increased the carbon flux into the mevalonate pathway resulting in increased amorphadiene production. This work will be generally applicable to the production of a broad range of isoprenoids in yeast. (c) 2006 Elsevier Inc. All rights reserved.
C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley Ctr Synthet Biol, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Calif Inst Quantitat Biomed Res, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Keasing, JD (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley Ctr Synthet Biol, 717 Potter St,Bldg 977,Mail Code 3224, Berkeley, CA 94720 USA.
EM keasling@berkeley.edu
RI Ro, Dae-Kyun/G-9289-2012
OI Ro, Dae-Kyun/0000-0003-1288-5347
NR 36
TC 124
Z9 132
U1 3
U2 40
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1096-7176
J9 METAB ENG
JI Metab. Eng.
PD MAR
PY 2007
VL 9
IS 2
BP 160
EP 168
DI 10.1016/j.ymben.2006.10.005
PG 9
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 151SD
UT WOS:000245310200005
PM 17196416
ER

PT J
AU Pitera, DJ
   Paddon, CJ
   Newman, JD
   Keasling, JD
AF Pitera, Douglas J.
   Paddon, Chris J.
   Newman, Jack D.
   Keasling, Jay D.
TI Balancing a heterologous mevalonate pathway for improved isoprenoid
   production in Escherichia coli
SO METABOLIC ENGINEERING
LA English
DT Article
DE pathway engineering; isoprenoids; toxicity; mevalonate pathway; E. coli
ID ADENYLATE ENERGY-CHARGE; HIGH-LEVEL PRODUCTION; P-BAD PROMOTER;
   ISOPENTENYL DIPHOSPHATE; 3-HYDROXY-3-METHYLGLUTARYL-COA REDUCTASE;
   GENE-EXPRESSION; HEAT-SHOCK; BIOSYNTHESIS; ACID; 1,3-PROPANEDIOL
AB Engineering biosynthetic pathways in microbes for the production of complex chemicals and pharmaceuticals is an attractive alternative to chemical synthesis. However, in transferring large pathways to alternate hosts and manipulating expression levels, the native regulation of carbon flux through the pathway may be lost leading to imbalances in the pathways. Previously, Escherichia coli was engineered to produce large quantities of isoprenoids by creating a mevalonate-based isopentenyl pyrophosphate biosynthetic pathway [Martin, V.J., Pitera, D.J., Withers, S.T., Newman, J.D., Keasling, J.D., 2003. Engineering a mevalonate pathway in Escherichia coli for production of terpenoids. Nat. Biotechnol. 21, 796-802]. The strain produces high levels of isoprenoids, but upon further investigation we discovered that the accumulation of pathway intermediates limited flux and that high-level expression of the mevalonate pathway enzymes inhibited cell growth. Gene titration studies and metabolite profiling using liquid chromatography-mass spectrometry linked the growth inhibition phenotype with the accumulation of the pathway intermediate 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG-CoA). Such an accumulation implies that the activity of HMG-CoA reductase was insufficient to balance flux in the engineered pathway. By modulating HMG-CoA reductase production, we eliminated the pathway bottleneck and increased mevalonate production. These results demonstrate that balancing carbon flux through the heterologous pathway is a key determinant in optimizing isoprenoid biosynthesis in microbial hosts. (c) 2006 Elsevier Inc. All rights reserved.
C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
   Amyris Biotechnol Inc, Emeryville, CA 94608 USA.
   Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Synthet Biol Dept, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Keasling, JD (reprint author), Berkeley Ctr Synthet Biol, 717 Potter St,Bldg 977,Mail Code 3224, Berkeley, CA 94720 USA.
EM keasling@berkeley.edu
RI Keasling, Jay/J-9162-2012
OI Keasling, Jay/0000-0003-4170-6088
NR 62
TC 194
Z9 217
U1 11
U2 75
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1096-7176
J9 METAB ENG
JI Metab. Eng.
PD MAR
PY 2007
VL 9
IS 2
BP 193
EP 207
DI 10.1016/j.ymben.2006.11.002
PG 15
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 151SD
UT WOS:000245310200008
PM 17239639
ER

PT J
AU Damian, D
   Oresic, M
   Verheij, E
   Meulman, J
   Friedman, J
   Adourian, A
   Morel, N
   Smilde, A
   van der Greef, J
AF Damian, Doris
   Oresic, Matej
   Verheij, Elwin
   Meulman, Jacqueline
   Friedman, Jerome
   Adourian, Aram
   Morel, Nicole
   Smilde, Age
   van der Greef, Jan
TI Applications of a new subspace clustering algorithm (COSA) in medical
   systems biology
SO METABOLOMICS
LA English
DT Article
DE COSA; subspace clustering; metabolomics; lipidomics; biomarkers;
   translational research; metabolic syndrome; Zucker rats; ZDF rats
ID GAS-CHROMATOGRAPHY; MASS-SPECTROMETRY; METABOLOMICS; PYROLYSIS; PROFILES
AB A novel clustering approach named Clustering Objects on Subsets of Attributes (COSA) has been proposed (Friedman and Meulman, (2004). Clustering objects on subsets of attributes. J. R. Statist. Soc. B 66, 1-25.) for unsupervised analysis of complex data sets. We demonstrate its usefulness in medical systems biology studies. Examples of metabolomics analyses are described as well as the unsupervised clustering based on the study of disease pathology and intervention effects in rats and humans. In comparison to principal components analysis and hierarchical clustering based on Euclidean distance, COSA shows an enhanced capability to trace partial similarities in groups of objects enabling a new discovery approach in systems biology as well as offering a unique approach to reveal common denominators of complex multi-factorial diseases in animal and human studies.
C1 BG Med Inc, Waltham, MA 02451 USA.
   VTT Tech Res Ctr Finland, Espoo 02044, Finland.
   TNO, Qual Life, NL-3700 AJ Zeist, Netherlands.
   Leiden Univ, Gorlaeus Labs, LACDR, Ctr Med Syst Biol, NL-2300 RA Leiden, Netherlands.
   Leiden Univ, Fac Social & Behav Sci, Data Theory Grp, NL-2300 RB Leiden, Netherlands.
   Leiden Univ, Math Inst, NL-2333 CA Leiden, Netherlands.
   Stanford Univ, Dept Stat, Stanford, CA 94305 USA.
   Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA.
   Univ Amsterdam, Fac Sci, NL-1018 WV Amsterdam, Netherlands.
RP Oresic, M (reprint author), BG Med Inc, 610 Lincoln St N, Waltham, MA 02451 USA.
EM matej.oresic@vtt.fi; jan.vandergreef@tno.nl
OI Oresic, Matej/0000-0002-2856-9165
NR 32
TC 14
Z9 15
U1 1
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013 USA
SN 1573-3882
J9 METABOLOMICS
JI Metabolomics
PD MAR
PY 2007
VL 3
IS 1
BP 69
EP 77
DI 10.1007/s11306-006-0045-z
PG 9
WC Endocrinology & Metabolism
SC Endocrinology & Metabolism
GA 151XB
UT WOS:000245323200007
ER

PT J
AU Elmer, JW
   Palmer, TA
   Specht, ED
AF Elmer, J. W.
   Palmer, T. A.
   Specht, E. D.
TI Direct observations of sigma phase formation in duplex stainless steels
   using in-situ synchrotron X-ray diffraction
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
   MATERIALS SCIENCE
LA English
DT Article
ID NI AUSTENITIC STEELS; HEAT-AFFECTED ZONE; MICROSTRUCTURAL STABILITY;
   MECHANICAL-PROPERTIES; AGING TREATMENTS; PRECIPITATION; TRANSFORMATIONS;
   TUNGSTEN; TI-6AL-4V; TOUGHNESS
AB The formation and growth of sigma (sigma) phase in 2205 duplex stainless steel (DSS) was observed and measured in real time using synchrotron radiation during 10 hour isothermal heat treatments at temperatures between 700 degrees C and 850 degrees C. Sigma formed in near-equilibrium quantities during the isothermal holds, starting from a microstructure which contained a balanced mixture of metastable ferrite and austenite. In-situ synchrotron diffraction continuously monitored the transformation, and these results were compared to those predicted by thermodynamic calculations. The data were further analyzed using a modified Johnson-Mehl-Avrami-Kolmogrov (JMAK) approach to determine kinetic parameters for sigma formation over this temperature range. The initial JMAK exponent, n, at low fractions of sigma was found to be approximately 7.0; however, toward the end of the transformation, n decreased to values of approximately 0.75. The change in the JMAK exponent was attributed to a change in the transformation mechanism from discontinuous precipitation with increasing nucleation rate, to growth of the existing sigma phase after nucleation site saturation occurred. Because of this change in mechanism, it was not possible to determine reliable values for the activation energy and pre-exponential terms for the JMAK equation. While cooling back to room temperature, the partial transformation of austenite resulted in a substantial increase in the ferrite content, but sigma retained its high-temperature value to room temperature.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Elmer, JW (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM elmer1@llnl.gov
RI Specht, Eliot/A-5654-2009
OI Specht, Eliot/0000-0002-3191-2163
NR 32
TC 42
Z9 46
U1 4
U2 21
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAR
PY 2007
VL 38A
IS 3
BP 464
EP 475
DI 10.1007/s11661-006-9076-3
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 166UD
UT WOS:000246405000003
ER

PT J
AU Rau, C
   Crecea, V
   Richter, CP
   Peterson, KM
   Jemian, PR
   Neuhausler, U
   Schneider, G
   Yu, X
   Braun, V
   Chiang, TC
   Robinson, IK
AF Rau, C.
   Crecea, V.
   Richter, C. -P.
   Peterson, K. M.
   Jemian, P. R.
   Neuhaeusler, U.
   Schneider, G.
   Yu, X.
   Braun, V.
   Chiang, T. -C.
   Robinson, I. K.
TI Imaging of micro- and nano-structures with hard X-rays
SO MICRO & NANO LETTERS
LA English
DT Article
ID MAMMALIAN COCHLEA; ENERGY
AB Imaging of micro- and nano-structures of opaque samples is demonstrated using hard X-rays. Two different methods are employed with an instrument recently built at the beamline 34 ID-C at the Advanced Photon Source. In-line phase contrast micro-imaging has been performed with highly coherent radiation. For the characterisation of structures as small as 50 nm, a hard X-ray microscope has been built. These complementary techniques cover a large range of length-scales.
C1 [Rau, C.; Crecea, V.; Peterson, K. M.; Jemian, P. R.; Yu, X.; Braun, V.; Chiang, T. -C.] Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
   [Rau, C.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   [Rau, C.] Purdue Univ, W Lafayette, IN 47907 USA.
   [Rau, C.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
   [Crecea, V.; Chiang, T. -C.] Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
   [Richter, C. -P.] Northwestern Univ, Feinberg Sch Med, Dept Otolaryngol Head & Neck Surg, Chicago, IL 60611 USA.
   [Neuhaeusler, U.] Univ Bielefeld, Fak Phys, D-33501 Bielefeld, Germany.
   [Schneider, G.] BESSY, D-12489 Berlin, Germany.
   [Robinson, I. K.] UCL, Dept Phys & Astron, London WC1E 6BT, England.
RP Rau, C (reprint author), Univ Illinois, Frederick Seitz Mat Res Lab, 104 S Goodwin Ave, Urbana, IL 61801 USA.
EM rau@anl.gov
RI Chiang, Tai/H-5528-2011
NR 17
TC 9
Z9 9
U1 1
U2 3
PU INST ENGINEERING TECHNOLOGY-IET
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
SN 1750-0443
J9 MICRO NANO LETT
JI Micro Nano Lett.
PD MAR
PY 2007
VL 2
IS 1
BP 1
EP 5
DI 10.1049/mnl:20065060
PG 5
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
SC Science & Technology - Other Topics; Materials Science
GA 255ZY
UT WOS:000252698600001
ER

PT J
AU Matthews, S
   Hacker, JM
   Cole, J
   Hare, J
   Long, CN
   Reynolds, RM
AF Matthews, Stuart
   Hacker, Joerg M.
   Cole, Jason
   Hare, Jeffrey
   Long, Charles N.
   Reynolds, R. Michael
TI Modification of the atmospheric boundary layer by a small island:
   observations from Nauru
SO MONTHLY WEATHER REVIEW
LA English
DT Article
ID WAKE; CLOUDS; FLOW
AB Nauru, a small island in the tropical Pacific, generates cloud plumes that may grow to over 100-km lengths. This study uses observations to examine the mesoscale disturbance of the marine atmospheric boundary layer by the island that produces these cloud plumes. Observations of the surface layer were made from two ships in the vicinity of Nauru and from instruments on the island. The structure of the atmospheric boundary layer over the island was investigated using aircraft flights. Cloud production over Nauru was examined using remote sensing instruments. The diurnal cycles of surface meteorology and radiation are characterized at a point near the west (downwind) coast of Nauru. The spatial variation of surface meteorology and radiation are also examined using surface and aircraft measurements. During the day, the island surface layer is warmer than the marine surface layer and wind speed is tower than over the ocean. Surface heating forces the growth of a thermal internal boundary layer, within which a plume of cumulus clouds forms. Cloud production begins early in the morning over the ocean near the island's lee shore; as heating intensifies during the day, cloud production moves upwind over Nauru. These clouds form a plume that may extend over 100 km downwind of Nauru. Aircraft observations showed that a plume of warm, dry air develops over the island that extends 15-20 km downwind before dissipating. Limited observations suggest that the cloud plume may be sustained farther downwind of Nauru by a pair of convective rolls. Suggestions for further investigation of the cloud plume are made.
C1 CSIRO, Ensis Forest Biosecur & Protect, Yarralumla, Australia.
   Airborne Res Australia, Salisbury S, Australia.
   Penn State Univ, University Pk, PA 16802 USA.
   NOAA, Environm Technol Lab, Boulder, CO USA.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Matthews, S (reprint author), CSIRO, Ensis Forest Biosecur & Protect, Locked Bag 17, Granville, NSW 2142, Australia.
EM stuart.matthews@ensisjv.com
NR 30
TC 6
Z9 6
U1 0
U2 1
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0027-0644
J9 MON WEATHER REV
JI Mon. Weather Rev.
PD MAR
PY 2007
VL 135
IS 3
BP 891
EP 905
DI 10.1175/MWR3319.1
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 150KB
UT WOS:000245214600011
ER

PT J
AU Njus, JM
   Vigeland, LE
   Li, X
   Springer, CS
   Taylor, M
   Telang, FW
   Coyle, P
   Rooney, WD
AF Njus, J. M.
   Vigeland, L. E.
   Li, X.
   Springer, C. S.
   Taylor, M.
   Telang, F. W.
   Coyle, P.
   Rooney, W. D.
TI Quantitative MRI measurements suggest sex-dependent gray matter
   involvement in MS
SO MULTIPLE SCLEROSIS
LA English
DT Meeting Abstract
CT 11th Annual Meeting of the
   Americas-Committee-for-Treatment-and-Research-in- Multiple-Sclerosis
CY OCT   08, 2006
CL Chicago, IL
SP Amer Comm Treatment & Res Multiple Scleros
DE brain tissue; gray matter; MRI; sex; water content; white matter
C1 Oregon Hlth & Sci Univ, Adv Imaging Res Ctr, Portland, OR 97201 USA.
   SUNY Stony Brook, Dept Neurol, Stony Brook, NY 11794 USA.
   Assoc Univ Inc, Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1352-4585
J9 MULT SCLER
JI Mult. Scler.
PD MAR
PY 2007
VL 13
IS 2
BP 299
EP 300
PG 2
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA 158LK
UT WOS:000245792800048
ER

PT J
AU Mohrenweiser, H
   Felton, J
   Galloway, S
   Batzer, M
AF Mohrenweiser, Harvey
   Felton, Jim
   Galloway, Sheila
   Batzer, Mark
TI Special issue: Dedicated in memory of Dr. Tony Carrano
SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS
LA English
DT Biographical-Item
C1 Oregon Hlth Sci Univ, Ctr Res Occupat & Environm Technol, Portland, OR 97239 USA.
   Lawrence Livermore Natl Lab, Biosci Directorate, Livermore, CA 94551 USA.
   Merck Res Labs, Dept Genet & Cellular Toxicol, West Point, PA 19486 USA.
   Louisiana State Univ, Biol Computat & Visualizat Ctr, Dept Biol Sci, Baton Rouge, LA 70803 USA.
RP Mohrenweiser, H (reprint author), Oregon Hlth Sci Univ, Ctr Res Occupat & Environm Technol, Portland, OR 97239 USA.
EM mohrenwe@ohsu.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0027-5107
J9 MUTAT RES-FUND MOL M
JI Mutat. Res.-Fundam. Mol. Mech. Mutagen.
PD MAR 1
PY 2007
VL 616
IS 1-2
BP 1
EP 2
DI 10.1016/j.mrfmmm.2006.11.001
PG 2
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 143YC
UT WOS:000244761300001
ER

PT J
AU Wilson, DM
   Thompson, LH
AF Wilson, David M., III
   Thompson, Laity H.
TI Molecular mechanisms of sister-chromatid exchange
SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS
LA English
DT Review
DE sister-chromatid exchange; single-strand break DNA repair; CHO EM9;
   XRCC1; bloom syndrome; homologous recombination; DNA replication forks
ID STRAND-BREAK REPAIR; BLOOMS-SYNDROME HELICASE; BASE EXCISION-REPAIR;
   DNA-LIGASE-III; CHINESE-HAMSTER CELLS; POLYMERASE-BETA INTERACTION; GENE
   TARGETING EFFICIENCY; FANCONI-ANEMIA PATHWAY; HOMOLOGOUS RECOMBINATION;
   MAMMALIAN-CELLS
AB Sister-chromatid exchange (SCE) is the process whereby, during DNA replication, two sister chromatids break and rejoin with one another, physically exchanging regions of the parental strands in the duplicated chromosomes. This process is considered to be conservative and error-free, since no information is generally altered during reciprocal interchange by homologous recombination. Upon the advent of non-radiolabel detection methods for SCE, such events were used as genetic indicators for potential genotoxins/mutagens in laboratory toxicology tests, since, as we now know, most forms of DNA damage induce chromatid exchange upon replication fork collapse. Much of our present understanding of the mechanisms of SCE stems from studies involving nonhuman vertebrate cell lines that are defective in processes of DNA repair and/or recombination. In this article, we present a historical perspective of studies spearheaded by Dr. Anthony V. Carrano and colleagues focusing on SCE as a genetic outcome, and the role of the single-strand break DNA repair protein XRCC1 in suppressing SCE. A more general overview of the cellular processes and key protein "effectors" that regulate the manifestation of SCE is also presented. (c) 2006 Elsevier B.V All rights reserved.
C1 NIA, Lab Mol Gerontol, NIH, Baltimore, MD 21224 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Wilson, DM (reprint author), NIA, Lab Mol Gerontol, NIH, 5600 Nathan Shock Dr, Baltimore, MD 21224 USA.
EM wilsonda@grc.nia.nih.gov
FU NCI NIH HHS [CA11256]
NR 125
TC 137
Z9 140
U1 3
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0027-5107
J9 MUTAT RES-FUND MOL M
JI Mutat. Res.-Fundam. Mol. Mech. Mutagen.
PD MAR 1
PY 2007
VL 616
IS 1-2
BP 11
EP 23
DI 10.1016/j.mrfmmm.2006.11.017
PG 13
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 143YC
UT WOS:000244761300004
PM 17157333
ER

PT J
AU Felton, JS
   Knize, MG
   Wu, RW
   Colvin, ME
   Hatch, FT
   Malfatti, MA
AF Felton, James S.
   Knize, Mark G.
   Wu, Rebekah W.
   Colvin, Michael E.
   Hatch, Frederick T.
   Malfatti, Michael A.
TI Mutagenic potency of food-derived heterocyclic amines
SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS
LA English
DT Article
DE heterocyclic amines; mutagenic potency; QSAR
ID HYDROPATHIC FACTORS; COOKING
AB The understanding of mutagenic potency has been primarily approached using "quantitative structure-activity relationships" QSAR). Often this method allows the prediction of mutagenic potency of the compound based on its structure. But it does not give the underlying reason why the mutagenic activities differ. We have taken a set of heterocyclic amine structures and used molecular dynamic calculations to dock these molecules into the active site of a computational model of the cytochrome P4501A2 enzyme. The calculated binding strength using Boltzman distribution constants was then compared to the QSAR value (HF/6-31G* optimized structures) and the Ames/Salmonella mutagenic potency. Further understanding will only come from knowing the complete set of mutagenic determinants. These include the nitreniurn ion half-life, DNA adduct half-life, efficiency of repair of the adduct, and ultimately fixation of the mutation through cellular processes. For two isomers, PHIP and 3-Me-PhIP, we showed that for the 100-fold difference in the mutagenic potency a 5-fold difference can be accounted for by differences in the P450 oxidation. The other factor of 20 is not clearly understood but is downstream from the oxidation step. The application of QSAR (chemical characteristics) to biological principles related to mutagenesis is explored in this report. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94551 USA.
   Univ Calif, Sch Nat Sci, Merced, CA USA.
RP Felton, JS (reprint author), Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, 7000 East Ave, Livermore, CA 94551 USA.
EM felton1@llnl.gov
FU NCI NIH HHS [CA55861]
NR 14
TC 41
Z9 41
U1 0
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0027-5107
J9 MUTAT RES-FUND MOL M
JI Mutat. Res.-Fundam. Mol. Mech. Mutagen.
PD MAR 1
PY 2007
VL 616
IS 1-2
BP 90
EP 94
DI 10.1016/j.mrfmmm.2006.11.010
PG 5
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 143YC
UT WOS:000244761300011
PM 17161439
ER

PT J
AU Morgan, WF
   Sowa, MB
AF Morgan, William F.
   Sowa, Marianne B.
TI Non-targeted bystander effects induced by ionizing radiation
SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS
LA English
DT Article
DE bystander effects; genomic instability; ionizing radiation; non-targeted
   effects
ID INDUCED GENOMIC INSTABILITY; MEDIATED INTERCELLULAR COMMUNICATION;
   SISTER-CHROMATID EXCHANGES; VERY-LOW FLUENCES; ALPHA-PARTICLES;
   HUMAN-CELLS; HUMAN FIBROBLASTS; CHROMOSOMAL INSTABILITY; CYTOPLASMIC
   IRRADIATION; PROLIFERATIVE RESPONSE
AB Radiation-induced bystander effects refer to those responses occurring in cells that were not subject to energy deposition events following ionizing radiation. These bystander cells may have been neighbors of irradiated cells, or physically separated but subject to soluble secreted signals from irradiated cells. Bystander effects have been observed in vitro and in vivo and for various radiation qualities. In tribute to an old friend and colleague, Anthony V. Carrano, who would have said "well what are the critical questions that should be addressed, and so what?", we review the evidence for non-targeted radiation-induced bystander effects with emphasis on prevailing questions in this rapidly developing research field, and the potential significance of bystander effects in evaluating the detrimental health effects of radiation exposure. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Maryland, RORL, Baltimore, MD 21201 USA.
   Univ Maryland, Marlene & Stewart Greenebaum Canc Ctr, Baltimore, MD 21201 USA.
   Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Morgan, WF (reprint author), Univ Maryland, RORL, BRB 7-011,655 W Balitimore St, Baltimore, MD 21201 USA.
EM WFMorgan@som.umaryland.edu
NR 61
TC 131
Z9 137
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0027-5107
J9 MUTAT RES-FUND MOL M
JI Mutat. Res.-Fundam. Mol. Mech. Mutagen.
PD MAR 1
PY 2007
VL 616
IS 1-2
BP 159
EP 164
DI 10.1016/j.mrfmmm.2006.11.009
PG 6
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 143YC
UT WOS:000244761300018
PM 17134726
ER

PT J
AU Russell, LB
   Hunsicker, PR
   Russell, WL
AF Russell, Liane B.
   Hunsicker, Patricia R.
   Russell, William L.
TI Comparison of the genetic effects of equimolar doses of ENU and MNU:
   While the chemicals differ dramatically in their mutagenicity in
   stem-cell spermatogonia, both elicit very high mutation rates in
   differentiating spermatogonia
SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS
LA English
DT Article
DE mouse; mutagenesis; specific-locus mutations; germ-cell stage;
   ethylnitrosourea (ENU); methylnitrosourea (MNU); spermatogonia
ID UNCONVENTIONAL MYOSIN-VA; LACZ TRANSGENIC MICE; ETHYL-N-NITROSOUREA;
   LOCUS MUTATIONS; MOUSE SPERMATOGONIA; GERM-CELLS; METHYL-NITROSOUREA;
   MOLECULAR ANALYSIS; REGION MUTATIONS; DELETION COMPLEX
AB Mutagenic, reproductive, and toxicity effects of two closely related chemicals, ethyinitrosourea (ENU) and methyinitrosourea (XINU), were compared at equimolar and near-equimolar doses in the mouse specific-locus test in a screen of all stages of spermatogenesis and spermiogenesis. In stem-cell spermatogonia (SG), ENU is more than an order of magnitude more mutagenic than MNU. During post-SG stages, both chemicals exhibit high peaks in mutation yield when differentiating spermatogonia (DG) and preleptotene spermatocytes are exposed. The mutation frequency induced by 75 mg MNU/kg during this peak interval is, to date, the highest induced by any single-exposure mutagenic treatment - chemical or radiation - that allows survival of the exposed animal and its germ cells, producing an estimated 10 new mutations per genome. There is thus a vast difference between stem cell and differentiating spermatogonia in their sensitivity to MNU, but little difference between these stages in their sensitivity to ENU.
   During stages following meiotic metaphase, the highest mutation yield is obtained from exposed spennatids, but for both chemicals, that yield is less than one-quarter that obtained from the peak interval. Large-lesion (LL) mutations were induced only in spermatids. Although only a few of the remaining mutations were analyzed molecularly, there is considerable evidence from recent molecular characterizations of the marker genes and their flanking chromosomal regions that most, if not all, mutations induced during the peak-sensitive period did not involve lesions outside the marked loci. Both ENU and MNU treatments of post-SG stages yielded significant numbers of mutants that were recovered as mosaics, with the proportion being higher for ENU than for MNU.
   Comparing the chemicals for the endpoints studied and additional ones (e.g., chromosome aberrations, toxicity to germ cells and to animals, teratogenicity) revealed that while XINU is generally more effective, the opposite is true when the target cells are SG. (c) 2006 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Life Sci Div, Oak Ridge, TN 37831 USA.
RP Russell, LB (reprint author), Oak Ridge Natl Lab, Life Sci Div, Oak Ridge, TN 37831 USA.
EM russelllb@ornl.gov
FU NIEHS NIH HHS [222Y01-ES-10067]
NR 46
TC 12
Z9 12
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0027-5107
J9 MUTAT RES-FUND MOL M
JI Mutat. Res.-Fundam. Mol. Mech. Mutagen.
PD MAR 1
PY 2007
VL 616
IS 1-2
BP 181
EP 195
DI 10.1016/j.mrfmmm.2006.11.003
PG 15
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 143YC
UT WOS:000244761300021
PM 17174358
ER

PT J
AU Jones, IM
   Thomas, CB
   Xi, T
   Mohrenweiser, HW
   Nelson, DO
AF Jones, Irene M.
   Thomas, Cynthia B.
   Xi, Tina
   Mohrenweiser, Harvey W.
   Nelson, David O.
TI Exploration of methods to identify polymorphisms associated with
   variation in DNA repair capacity phenotypes
SO MUTATION RESEARCH-FUNDAMENTAL AND MOLECULAR MECHANISMS OF MUTAGENESIS
LA English
DT Article
DE polymorphism; DNA repair; phenotype; genotype
ID ACID SUBSTITUTION VARIANTS; GENETIC-VARIATION; RISK; CANCER; HUMANS;
   DAMAGE; SUSCEPTIBILITY; HERITABILITY; REGRESSION
AB Elucidating the relationship between polymorphic sequences and risk of common disease is a challenge. For example, although it is clear that variation in DNA repair genes is associated with familial cancer, aging and neurological disease, progress toward identifying polymorphisms associated with elevated risk of sporadic disease has been slow. This is partly due to the complexity of the genetic variation, the existence of large numbers of mostly low frequency variants and the contribution of many genes to variation in susceptibility. There has been limited development of methods to find associations between genotypes having many polymorphisms and pathway function or health outcome. We have explored several statistical methods for identifying polymorphisms associated with variation in DNA repair phenotypes. The model system used was 80 cell lines that had been resequenced to identify variation; 191 single nucleotide substitution polymorphisms (SNPs) are included, of which 172 are in 31 base excision repair pathway genes, 19 in 5 anti-oxidation genes, and DNA repair phenotypes based on single strand breaks measured by the alkaline Comet assay. Univariate analyses were of limited value in identifying SNPs associated with phenotype variation. Of the multivariable model selection methods tested: the easiest that provided reduced error of prediction of phenotype was simple counting of the variant alleles predicted to encode proteins with reduced activity, which led to a genotype including 52 SNPs; the best and most parsimonious model was achieved using a two-step analysis without regard to potential functional relevance: first SNPs were ranked by importance determined by random forests regression (RFR), followed by cross-validation in a second round of RFR modeling that included ever more SNPs in declining order of importance. With this approach six SNPs were found to minimize prediction error. The results should encourage research into utilization of multivariate analytical methods for epidemiological studies of the association of genetic variation in complex genotypes with risk of common diseases. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Oregon Hlth Sci Univ, Portland, OR 97201 USA.
RP Jones, IM (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM jones20@llnl.gov
NR 26
TC 11
Z9 11
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0027-5107
J9 MUTAT RES-FUND MOL M
JI Mutat. Res.-Fundam. Mol. Mech. Mutagen.
PD MAR 1
PY 2007
VL 616
IS 1-2
BP 213
EP 220
DI 10.1016/j.mrfmmm.2006.11.005
PG 8
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Toxicology
GA 143YC
UT WOS:000244761300025
PM 17145065
ER

PT J
AU Karnik, R
   Duan, CH
   Castelino, K
   Daiguji, H
   Majumdar, A
AF Karnik, Rohit
   Duan, Chuanhua
   Castelino, Kenneth
   Daiguji, Hirofumi
   Majumdar, Arun
TI Rectification of ionic current in a nanofluidic diode
SO NANO LETTERS
LA English
DT Article
ID TRANSPORT-PROPERTIES; BIPOLAR MEMBRANES; NANOPORES; CHANNELS; AVIDIN;
   NANOCHANNEL; ENRICHMENT; DIFFUSION; MOLECULES; PROTEINS
AB We demonstrate rectification of ionic transport in a nanofluidic diode fabricated by introducing a surface charge discontinuity in a nanofluidic channel. Device current-voltage (I-V) characteristics agree qualitatively with a one-dimensional model at moderate to high ionic concentrations. This study illustrates ionic flow control using surface charge patterning in nanofluidic channels under high bias voltages.
C1 Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA.
   Univ Tokyo, Grad Sch Frontier Sci, Inst Environm Studies, Kashiwa, Chiba 2778563, Japan.
   Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
RP Karnik, R (reprint author), MIT, Dept Mech Engn, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
RI Daiguji, Hirofumi/B-2098-2013; 
OI Duan, Chuanhua/0000-0002-5453-5321
NR 27
TC 249
Z9 249
U1 18
U2 103
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2007
VL 7
IS 3
BP 547
EP 551
DI 10.1021/nl062806o
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 145LU
UT WOS:000244867400002
PM 17311461
ER

PT J
AU Romo-Herrera, JM
   Terrones, M
   Terrones, H
   Dag, S
   Meunier, V
AF Romo-Herrera, J. M.
   Terrones, M.
   Terrones, H.
   Dag, S.
   Meunier, V.
TI Covalent 2D and 3D networks from 1D nanostructures: Designing new
   materials
SO NANO LETTERS
LA English
DT Article
ID CARBON NANOTUBES; QUANTUM CONDUCTANCE; DIAMOND; GRAPHITE; CRYSTALS;
   DEFECTS
AB We show extensive theoretical studies related to the generation and characterization of 2D and 3D ordered networks using 1D units that are connected covalently. We experimentally created multi-terminal junctions containing 1D carbon blocks in order to study the most common morphologies and branched structures that could be used in the theoretical design of network models. We found that the mechanical and electronic characteristics of ordered networks based on carbon nanotubes (ON-CNTs) are dominated by their specific super-architecture (hexagonal, cubic, square, and diamond-type). We show that charges follow specific paths through the nodes of the multi-terminal systems, which could result in complex integrated nanoelectronic circuits. The 3D architectures reveal their ability to support extremely high unidirectional stress when their mechanical properties are studied. In addition, these networks are shown to perform better than standard carbon aerogels because of their low mass densities, continuous porosities, and high surface areas.
C1 IPICYT, Adv Mat Dept, Mexico City 78216, DF, Mexico.
   Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Terrones, M (reprint author), IPICYT, Adv Mat Dept, Camino Presa San Jose 2055,Col Lomas 4A,Secc, Mexico City 78216, DF, Mexico.
EM mterrones@ipicyt.edu.mx
RI Meunier, Vincent/F-9391-2010; Terrones, Mauricio/B-3829-2014
OI Meunier, Vincent/0000-0002-7013-179X; 
NR 34
TC 123
Z9 127
U1 6
U2 54
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2007
VL 7
IS 3
BP 570
EP 576
DI 10.1021/nl0622202
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 145LU
UT WOS:000244867400006
PM 17355117
ER

PT J
AU Paunesku, T
   Vogt, S
   Lai, B
   Maser, J
   Stojicevic, N
   Thurn, KT
   Osipo, C
   Liu, H
   Legnini, D
   Wang, Z
   Lee, C
   Woloschak, GE
AF Paunesku, Tatjana
   Vogt, Stefan
   Lai, Barry
   Maser, Jorg
   Stojicevic, Natasa
   Thurn, Kenneth T.
   Osipo, Clodia
   Liu, Hong
   Legnini, Daniel
   Wang, Zhou
   Lee, Chung
   Woloschak, Gayle E.
TI Intracellular distribution of TiO2-DNA oligonucleotide nanoconjugates
   directed to nucleolus and mitochondria indicates sequence specificity
SO NANO LETTERS
LA English
DT Article
ID SINGLE-STRANDED OLIGONUCLEOTIDES; TARGETED GENE CORRECTION; RNA/DNA
   OLIGONUCLEOTIDES; CHIMERIC RNA/DNA; DNA; NANOPARTICLES; NANOCOMPOSITES;
   THERAPY; TUMORS
AB Deoxyribonucleic acid (DNA) oligonucleotides hybridize to matching DNA sequences in cells, as established in the literature, depending on active transcription of the target sequence and local molarity of the oligonucleotide. We investigated the intracellular distribution of nanoconjugates composed of DNA oligonucleotides attached to TiO2 nanoparticles, thus creating a locally increased concentration of the oligonucleotide. Two types of nanoconjugates, with oligonucleotides matching mitochondrial or nucleolar DNA, were specifically retained in mitochondria or nucleoli.
C1 Northwestern Univ, Dept Radiat Oncol, Chicago, IL 60611 USA.
   Northwestern Univ, Robert H Lurie Comprehens Canc Ctr, Chicago, IL 60611 USA.
   Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA.
   Loyola Univ, Med Ctr, Cardinal Bernadin Canc Ctr, Maywood, IL 60153 USA.
   Univ Penn, Med Ctr, Dept Urol, Pittsburgh, PA 15213 USA.
   Northwestern Univ, Dept Urol, Chicago, IL 60611 USA.
   Northwestern Univ, Dept Radiol, Chicago, IL 60611 USA.
   Northwestern Univ, Dept Cell & Mol Biol, Chicago, IL 60611 USA.
RP Woloschak, GE (reprint author), Northwestern Univ, Dept Radiat Oncol, Chicago, IL 60611 USA.
EM g-woloschak@northwestern.edu
RI Maser, Jorg/K-6817-2013; Vogt, Stefan/B-9547-2009; Vogt,
   Stefan/J-7937-2013; Paunesku, Tatjana/A-3488-2017; Woloschak,
   Gayle/A-3799-2017
OI Vogt, Stefan/0000-0002-8034-5513; Vogt, Stefan/0000-0002-8034-5513;
   Paunesku, Tatjana/0000-0001-8698-2938; Woloschak,
   Gayle/0000-0001-9209-8954
FU NCI NIH HHS [CA107467, P50 CA089018, P50 CA89018, R01 CA107467, U54
   CA119341, U54CA119341]; NIBIB NIH HHS [EB002100, R01 EB002100]
NR 22
TC 79
Z9 79
U1 3
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2007
VL 7
IS 3
BP 596
EP 601
DI 10.1021/nl0624723
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 145LU
UT WOS:000244867400010
PM 17274661
ER

PT J
AU Meng, S
   Kaxiras, E
   Zhang, ZY
AF Meng, Sheng
   Kaxiras, Efthimios
   Zhang, Zhenyu
TI Metal-diboride nanotubes as high-capacity hydrogen storage media
SO NANO LETTERS
LA English
DT Article
ID MOLECULES
AB We investigate the potential for hydrogen storage of a new class of nanomaterials, metal-diboride nanotubes. These materials have the merits of a high density of binding sites on the tubular surfaces without the adverse effects of metal clustering. Using the TiB(2) (8,0) and (5,5) nanotubes as prototype examples, we show through first-principles calculations that each Ti atom can host two intact H(2) units, leading to a retrievable hydrogen storage capacity of 5.5 wt %. Most strikingly, the binding energies fall in the desirable range of 0.2-0.6 eV per H(2) molecule, endowing these structures with the potential for room-temperature, near-ambient-pressure applications.
C1 Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA.
   Univ Texas, Dept Phys, Austin, TX 78712 USA.
   Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Kaxiras, E (reprint author), Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
EM kaxiras@cmt.harvard.edu
RI Meng, Sheng/A-7171-2010
OI Meng, Sheng/0000-0002-1553-1432
NR 20
TC 94
Z9 97
U1 2
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2007
VL 7
IS 3
BP 663
EP 667
DI 10.1021/nl062692g
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 145LU
UT WOS:000244867400022
PM 17316056
ER

PT J
AU Tang, YJJ
   Ashcroft, JM
   Chen, D
   Min, GW
   Kim, CH
   Murkhejee, B
   Larabell, C
   Keasling, JD
   Chen, FQF
AF Tang, Yinjie J.
   Ashcroft, Jared M.
   Chen, Ding
   Min, Guangwei
   Kim, Chul-Hyun
   Murkhejee, Bipasha
   Larabell, Carolyn
   Keasling, Jay D.
   Chen, Fanqing Frank
TI Charge-associated effects of fullerene derivatives on microbial
   structural integrity and central metabolism
SO NANO LETTERS
LA English
DT Article
ID SHEWANELLA-ONEIDENSIS MR-1; FLUX ANALYSIS; CARBON NANOTUBES; C-60;
   WATER; CYTOTOXICITY; INHIBITION; CARBOXYFULLERENE; ANTIBACTERIAL;
   NANOMATERIALS
AB The effects of four types of fullerene compounds (C-60, C-60-OH, C-60-COOH, C-60-NH2) were examined on two model microorganisms (Escherichia coli W3110 and Shewanella oneidensis MR-1). Positively charged C-60-NH2 at concentrations as low as 10 mg/L inhibited growth and reduced substrate uptake for both microorganisms. Scanning electron microscopy (SEM) revealed damage to cellular structures. Neutrally charged C-60 and C-60-OH had mild negative effects on S. oneidensis MR-1, whereas the negatively charged C-60-COOH did not affect either microorganism's growth. The effect of fullerene compounds on global metabolism was further investigated using [3-C-13]L-lactate isotopic labeling, which tracks perturbations to metabolic reaction rates in bacteria by examining the change in the isotopic labeling pattern in the resulting metabolites (often amino acids).(1-3) The C-13 isotopomer analysis from all fullerene-exposed cultures revealed no significant differences in isotopomer distributions from unstressed cells. This result indicates that microbial central metabolism is robust to environmental stress inflicted by fullerene nanoparticles. In addition, although C-60-NH2 compounds caused mechanical stress on the cell wall or membrane, both S. oneidensis MR-1 and E. coli W3110 can efficiently alleviate such stress by cell aggregation and precipitation of the toxic nanoparticles. The results presented here favor the hypothesis that fullerenes cause more membrane stress(4-6) than perturbation to energy metabolism.(7)
C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Calif State Univ, Dept Chem & Biochem, E Bay, CA 94542 USA.
   Univ Calif San Francisco, Dept Anat, San Francisco, CA 94143 USA.
RP Keasling, JD (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM keasling@berkeley.edu; f_chen@lbl.gov
RI Keasling, Jay/J-9162-2012
OI Keasling, Jay/0000-0003-4170-6088
FU NCI NIH HHS [R21CA95393-01]
NR 53
TC 85
Z9 91
U1 0
U2 32
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2007
VL 7
IS 3
BP 754
EP 760
DI 10.1021/nl063020t
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 145LU
UT WOS:000244867400039
PM 17288489
ER

PT J
AU Park, TJ
   Papaefthymiou, GC
   Viescas, AJ
   Moodenbaugh, AR
   Wong, SS
AF Park, Tae-Jin
   Papaefthymiou, Georgia C.
   Viescas, Arthur J.
   Moodenbaugh, Arnold R.
   Wong, Stanislaus S.
TI Size-dependent magnetic properties of single-crystalline multiferroic
   BiFeO3 nanoparticles
SO NANO LETTERS
LA English
DT Article
ID THIN-FILMS; ELECTRIC POLARIZATION; ROOM-TEMPERATURE; BISMUTH FERRITE;
   FINS
AB As-prepared, single-crystalline bismuth ferrite nanoparticles show strong size-dependent magnetic properties that correlate with: (a) increased suppression of the known spiral spin structure (period length of similar to 62 nm) with decreasing nanoparticle size and (b) uncompensated spins and strain anisotropies at the surface. Zero-field-cooled and field-cooled magnetization curves exhibit spin-glass freezing behavior due to a complex interplay between finite size effects, interparticle interactions, and a random distribution of anisotropy axes in our nanoparticle assemblies.
C1 SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
   Villanova Univ, Dept Phys, Villanova, PA 19085 USA.
   Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA.
RP Wong, SS (reprint author), SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
EM sswong@notes.cc.sunysb.edu
OI Moodenbaugh, Arnold/0000-0002-3415-6762
NR 49
TC 617
Z9 629
U1 37
U2 294
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2007
VL 7
IS 3
BP 766
EP 772
DI 10.1021/nl063039w
PG 7
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 145LU
UT WOS:000244867400041
PM 17324002
ER

PT J
AU Humphrey, SM
   Grass, ME
   Habas, SE
   Niesz, K
   Somorjai, GA
   Tilley, TD
AF Humphrey, Simon M.
   Grass, Michael E.
   Habas, Susan E.
   Niesz, Krisztian
   Somorjai, Gabor A.
   Tilley, T. Don
TI Rhodium nanoparticles from cluster seeds: Control of size and shape by
   precursor addition rate
SO NANO LETTERS
LA English
DT Article
ID 1.5-NM GOLD NANOPARTICLES; NANOCRYSTAL SYNTHESIS; RH(0) NANOCLUSTERS;
   LIGAND-EXCHANGE; METAL-CLUSTERS; CRYSTAL-GROWTH; MECHANISM; CATALYSIS;
   AGGREGATION; MODEL
AB The size-tunable synthesis of poly(vinylpyrrolidone)-stabilized cuboctahedral rhodium nanoparticles with mean diameters ranging between 3-7 nm and multipod structures was accomplished using seeded growth methods. Isotropic PVP-capped 2.9 nm seeds were prepared by ligand exchange on rhodium-triphenylphosphine metal-organic clusters. Quantitative investigation of reaction parameters in ethylene glycol revealed that size and shape could be controlled at a single reaction temperature of 120 degrees C. The rate of rhodium monomer addition was found to be critical for monodispersity and shape control, regardless of thermodynamic factors. Solvent viscosity, varied by changing the polyol solvents, indicated that autocatalytic addition kinetics are responsible for isotropic versus anisotropic growth.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Chem & Mat Sci, Berkeley, CA 94720 USA.
RP Somorjai, GA (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM somorjai@berkeley.edu; tdtilley@berkeley.edu
NR 37
TC 79
Z9 80
U1 4
U2 68
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD MAR
PY 2007
VL 7
IS 3
BP 785
EP 790
DI 10.1021/nl070035y
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 145LU
UT WOS:000244867400044
PM 17288491
ER

PT J
AU Jeffries, TW
   Grigoriev, IV
   Grimwood, J
   Laplaza, JM
   Aerts, A
   Salamov, A
   Schmutz, J
   Lindquist, E
   Dehal, P
   Shapiro, H
   Jin, YS
   Passoth, V
   Richardson, PM
AF Jeffries, Thomas W.
   Grigoriev, Igor V.
   Grimwood, Jane
   Laplaza, Jose M.
   Aerts, Andrea
   Salamov, Asaf
   Schmutz, Jeremy
   Lindquist, Erika
   Dehal, Paramvir
   Shapiro, Harris
   Jin, Yong-Su
   Passoth, Volkmar
   Richardson, Paul M.
TI Genome sequence of the lignocellulose-bioconverting and
   xylose-fermenting yeast Pichia stipitis
SO NATURE BIOTECHNOLOGY
LA English
DT Article
ID CANDIDA-SHEHATAE; SACCHAROMYCES; STRAINS; GENES; METABOLISM; ETHANOL;
   EVOLUTION; ELEMENTS; LOCI; DNA
AB Xylose is a major constituent of plant lignocellulose, and its fermentation is important for the bioconversion of plant biomass to fuels and chemicals. Pichia stipitis is a well-studied, native xylose-fermenting yeast. The mechanism and regulation of xylose metabolism in P. stipitis have been characterized and genes from P. stipitis have been used to engineer xylose metabolism in Saccharomyces cerevisiae. We have sequenced and assembled the complete genome of P. stipitis. The sequence data have revealed unusual aspects of genome organization, numerous genes for bioconversion, a preliminary insight into regulation of central metabolic pathways and several examples of colocalized genes with related functions. The genome sequence provides insight into how P. stipitis regulates its redox balance while very efficiently fermenting xylose under microaerobic conditions.
C1 US Forest Serv, Forest Prod Lab, USDA, Madison, WI 53705 USA.
   Univ Wisconsin, Dept Bacteriol, Madison, WI 53706 USA.
   DOE Joint Genome Inst, Walnut Creek, CA 94598 USA.
   Stanford Univ, Human Genome Ctr, JGI Stanford, Palo Alto, CA 94304 USA.
   Cargill, BioTechnol Dev Ctr, Minneapolis, MN 55440 USA.
   Sungkyunkwan Univ, Dept Food Sci & Biotechnol, Suwon, South Korea.
   Swedish Univ Agr Sci, Dept Microbiol, S-75007 Uppsala, Sweden.
RP Jeffries, TW (reprint author), US Forest Serv, Forest Prod Lab, USDA, 1 Gifford Pinchot Dr, Madison, WI 53705 USA.
EM twjeffri@wisc.edu; ivgrigoriev@lbl.gov
RI Jeffries, Thomas/I-8576-2012; Jin, Yong-Su/L-4530-2013; Schmutz,
   Jeremy/N-3173-2013; 
OI Jeffries, Thomas/0000-0001-7408-4065; Schmutz,
   Jeremy/0000-0001-8062-9172; Passoth, Volkmar/0000-0002-2059-9044
NR 50
TC 251
Z9 530
U1 2
U2 54
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA
SN 1087-0156
J9 NAT BIOTECHNOL
JI Nat. Biotechnol.
PD MAR
PY 2007
VL 25
IS 3
BP 319
EP 326
DI 10.1038/nbt1290
PG 8
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA 143TP
UT WOS:000244748300024
PM 17334359
ER

PT J
AU Sheng, HW
   Liu, HZ
   Cheng, YQ
   Wen, J
   Lee, PL
   Luo, WK
   Shastri, SD
   Ma, E
AF Sheng, H. W.
   Liu, H. Z.
   Cheng, Y. Q.
   Wen, J.
   Lee, P. L.
   Luo, W. K.
   Shastri, S. D.
   Ma, E.
TI Polyamorphism in a metallic glass
SO NATURE MATERIALS
LA English
DT Article
ID AUGMENTED-WAVE METHOD; PHASE-TRANSITION; HIGH-PRESSURE; LIQUIDS;
   PACKING; CERIUM
AB A metal, or an alloy, can often exist in more than one crystal structure. The face-centred-cubic and body-centred-cubic forms of iron (or steel) are a familiar example of such polymorphism. When metallic materials are made in the amorphous form, is a parallel 'polyamorphism' possible? So far, polyamorphic phase transitions(1-7) in the glassy state have been observed only in glasses involving directional and open (such as tetrahedral(4,5)) coordination environments. Here, we report an in situ X-ray diffraction observation of a pressure-induced transition between two distinct amorphous polymorphs in a Ce(55)Al(45) metallic glass. The large density difference observed between the two polyamorphs is attributed to their different electronic and atomic structures, in particular the bond shortening revealed by ab initio modelling of the effects of f-electron delocalization(8-10). This discovery offers a new perspective of the amorphous state of metals, and has implications for understanding the structure, evolution and properties of metallic glasses and related liquids. Our work also opens a new avenue towards technologically useful amorphous alloys that are compositionally identical but with different thermodynamic, functional and rheological properties(11) due to different bonding and structural characteristics.
C1 Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA.
   Carnegie Inst Washington, HPCAT, Geophys Lab, Argonne, IL 60439 USA.
   Harbin Inst Technol, Ctr Condensed Matter Sci & Technol, Harbin 150080, Peoples R China.
   Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China.
   Argonne Natl Lab, Adv Photon Source, XOR, Argonne, IL 60439 USA.
RP Sheng, HW (reprint author), Johns Hopkins Univ, Dept Mat Sci & Engn, Baltimore, MD 21218 USA.
EM hwsheng@jhu.edu; ema@jhu.edu
RI Cheng, Yongqiang/F-6567-2010; Ma, En/A-3232-2010; Liu,
   Haozhe/E-6169-2011; Sheng, Howard/B-2033-2013
NR 32
TC 191
Z9 195
U1 18
U2 139
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD MAR
PY 2007
VL 6
IS 3
BP 192
EP 197
DI 10.1038/nmat1839
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 141HZ
UT WOS:000244570700016
PM 17310140
ER

PT J
AU Sickafus, KE
   Grimes, RW
   Valdez, JA
   Cleave, A
   Tang, M
   Ishimaru, M
   Corish, SM
   Stanek, CR
   Uberuaga, BP
AF Sickafus, Kurt E.
   Grimes, Robin W.
   Valdez, James A.
   Cleave, Antony
   Tang, Ming
   Ishimaru, Manabu
   Corish, Siobhan M.
   Stanek, Christopher R.
   Uberuaga, Blas P.
TI Radiation-induced amorphization resistance and radiation tolerance in
   structurally related oxides
SO NATURE MATERIALS
LA English
DT Article
ID ORDER-DISORDER TRANSITION; NUCLEAR-WASTE; PYROCHLORE; PLUTONIUM;
   IMMOBILIZATION; FORM
AB Ceramics destined for use in hostile environments such as nuclear reactors or waste immobilization must be highly durable and especially resistant to radiation damage effects. In particular, they must not be prone to amorphization or swelling. Few ceramics meet these criteria and much work has been devoted in recent years to identifying radiation-tolerant ceramics and the characteristics that promote radiation tolerance. Here, we examine trends in radiation damage behaviour for families of compounds related by crystal structure. Specifically, we consider oxides with structures related to the fluorite crystal structure. We demonstrate that improved amorphization resistance characteristics are to be found in compounds that have a natural tendency to accommodate lattice disorder.
C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2BP, England.
   Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan.
   Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Sickafus, KE (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
EM kurt@lanl.gov
NR 28
TC 209
Z9 212
U1 13
U2 103
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
J9 NAT MATER
JI Nat. Mater.
PD MAR
PY 2007
VL 6
IS 3
BP 217
EP 223
DI 10.1038/nmat1842
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 141HZ
UT WOS:000244570700021
PM 17322869
ER

PT J
AU Kang, HJ
   Dai, PC
   Campbell, BJ
   Chupas, PJ
   Rosenkranz, S
   Lee, PL
   Huang, QZ
   Li, SL
   Komiya, S
   Ando, Y
AF Kang, Hye Jung
   Dai, Pengcheng
   Campbell, Branton J.
   Chupas, Peter J.
   Rosenkranz, Stephan
   Lee, Peter L.
   Huang, Qingzhen
   Li, Shiliang
   Komiya, Seiki
   Ando, Yoichi
TI Microscopic annealing process and its impact on superconductivity in T
   '-structure electron-doped copper oxides
SO NATURE MATERIALS
LA English
DT Article
ID CRYSTAL NEUTRON-DIFFRACTION; SINGLE-CRYSTAL; OXYGEN; DEFICIENCY;
   COMPOUND; PHASE
AB High-transition-temperature superconductivity arises in copper oxides when holes or electrons are doped into the CuO2 planes of their insulating parent compounds. Whereas hole doping quickly induces metallic behaviour and superconductivity in many cuprates, electron doping alone is insuffcient in materials such as R2CuO4 (R is Nd, Pr, La, Ce and so on), where it is necessary to anneal an as grown sample in a low-oxygen environment to remove a tiny amount of oxygen in order to induce superconductivity. Here we show that the microscopic process of oxygen reduction repairs Cu deficiencies in the as-grown materials and creates oxygen vacancies in the stoichiometric CuO2 planes, effectively reducing disorder and providing itinerant carriers for superconductivity. The resolution of this long-standing materials issue suggests that the fundamental mechanism for superconductivity is the same for electron- and hole-doped copper oxides.
C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA.
   Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
   Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
   Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 USA.
   Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan.
RP Kang, HJ (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM hkang@nist.gov; daip@ornl.gov
RI Campbell, Branton/A-3990-2008; Li, Shiliang/B-9379-2009; Rosenkranz,
   Stephan/E-4672-2011; Dai, Pengcheng /C-9171-2012; Ando,
   Yoichi/B-8163-2013
OI Rosenkranz, Stephan/0000-0002-5659-0383; Dai, Pengcheng
   /0000-0002-6088-3170; Ando, Yoichi/0000-0002-3553-3355
NR 34
TC 60
Z9 61
U1 1
U2 16
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
EI 1476-4660
J9 NAT MATER
JI Nat. Mater.
PD MAR
PY 2007
VL 6
IS 3
BP 224
EP 229
DI 10.1038/nmat1847
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 141HZ
UT WOS:000244570700022
PM 17310138
ER

PT J
AU Stamenkovic, VR
   Mun, BS
   Arenz, M
   Mayrhofer, KJJ
   Lucas, CA
   Wang, GF
   Ross, PN
   Markovic, NM
AF Stamenkovic, Vojislav R.
   Mun, Bongjin Simon
   Arenz, Matthias
   Mayrhofer, Karl J. J.
   Lucas, Christopher A.
   Wang, Guofeng
   Ross, Philip N.
   Markovic, Nenad M.
TI Trends in electrocatalysis on extended and nanoscale Pt-bimetallic alloy
   surfaces
SO NATURE MATERIALS
LA English
DT Article
ID OXYGEN REDUCTION REACTION; SINGLE-CRYSTAL SURFACES; ACID-SOLUTION;
   FUEL-CELLS; CO; KINETICS; METAL; FE; NI; CATALYSTS
AB One of the key objectives in fuel-cell technology is to improve and reduce Pt loading as the oxygen-reduction catalyst. Here, we show a fundamental relationship in electrocatalytic trends on Pt3M (M = Ni, Co, Fe, Ti, V) surfaces between the experimentally determined surface electronic structure (the d-band centre) and activity for the oxygen-reduction reaction. This relationship exhibits 'volcano-type' behaviour, where the maximum catalytic activity is governed by a balance between adsorption energies of reactive intermediates and surface coverage by spectator (blocking) species. The electrocatalytic trends established for extended surfaces are used to explain the activity pattern of Pt3M nanocatalysts as well as to provide a fundamental basis for the catalytic enhancement of cathode catalysts. By combining simulations with experiments in the quest for surfaces with desired activity, an advanced concept in nanoscale catalyst engineering has been developed.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Hanyang Univ, Dept Appl Phys, Ansan 426791, Kyunggi Do, South Korea.
   Tech Univ Munich, D-80333 Munich, Germany.
   Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
   Univ S Carolina, Dept Chem & Phys, Aiken, SC 29801 USA.
RP Stamenkovic, VR (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM vrstamenkovic@anl.gov; nmmarkovic@anl.gov
RI Mayrhofer, Karl/D-4166-2009; Arenz, Matthias/C-7385-2009; Mun, Bongjin
   /G-1701-2013; Arenz, Matthias/C-3195-2016; 
OI Arenz, Matthias/0000-0001-9765-4315; Arenz,
   Matthias/0000-0001-9765-4315; Lucas, Christopher/0000-0001-5743-3868
NR 35
TC 1326
Z9 1336
U1 117
U2 904
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1476-1122
EI 1476-4660
J9 NAT MATER
JI Nat. Mater.
PD MAR
PY 2007
VL 6
IS 3
BP 241
EP 247
DI 10.1038/nmat1840
PG 7
WC Chemistry, Physical; Materials Science, Multidisciplinary; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 141HZ
UT WOS:000244570700025
PM 17310139
ER

PT J
AU Goldstein, RZ
   Tomasi, D
   Alia-Klein, N
   Zhang, L
   Telang, F
   Volkow, ND
AF Goldstein, Rita Z.
   Tomasi, Dardo
   Alia-Klein, Nelly
   Zhang, Lei
   Telang, Frank
   Volkow, Nora D.
TI The effect of practice on a sustained attention task in cocaine abusers
SO NEUROIMAGE
LA English
DT Article
DE fMRI BOLD; adaptation; practice effects; prefrontal cortex; alertness;
   drug abuse; drug addiction; salience; reward
ID MEDIAL PREFRONTAL CORTEX; WORKING-MEMORY; ANTERIOR CINGULATE;
   FUNCTIONAL-ANATOMY; VISUAL-ATTENTION; DRUG-ADDICTION; FRONTAL-CORTEX;
   ACTIVATION; BRAIN; HABITUATION
AB Habituation enables the organism to attend selectively to novel stimuli by diminishing no-longer necessary responses to repeated stimuli. Because the prefrontal cortex (PFC) has a core role in monitoring attention and behavioral control especially under novelty, neural habituation responses may be modified in drug addiction, a psychopathology that entails PFC abnormalities in both structure and function. Sixteen cocaine abusers and 12 gender-, race-, education-, and intelligence-matched healthy control subjects performed an incentive sustained attention task twice, under novelty and after practice, during functional magnetic resonance imaging. For cocaine abusers practice effects were noted in the PFC (including anterior cingulate cortex/ventromedial rostral PFC, dorsolateral PFC, and medial frontal gyrus) and cerebellum (signal attenuations/decreases: return to baseline); activations in these regions were associated with craving, frequency of use, and length of abstinence. In the control subjects practice effects were instead restricted to posterior brain regions (precuneus and cuneus) (signal amplifications/increases: deactivation away from baseline). Also, only in the cocaine abusers, increased speed of behavioral performance between novelty to practice was associated with a respective attenuation of activation in the thalamus. Overall, we report for the first time a differential pattern of neural responses to repeated presentation of an incentive sustained attention task in cocaine addiction. Our results suggest a disruption in drug addiction of neural habituation to practice that possibly encompasses opponent anterior vs. posterior brain adaptation to the novelty of the experience: overly expeditious for the former but overly protracted for the latter. Overall, cocaine addicted individuals may be predisposed to an increased challenge when required to maintain alertness as a task progresses, not able to optimally utilize a prematurely habituating PFC to compensate with an increased attribution of salience to a desired reward. (c) 2006 Elsevier Inc. All rights reserved.
C1 Brookhaven Natl Lab, Dept Med Res, Ctr Translat NeuroImaging, Upton, NY 11973 USA.
   SUNY Stony Brook, Dept Comp Sci, Stony Brook, NY 11794 USA.
   NIDA, Bethesda, MD 20892 USA.
   NIAAA, Rockville, MD 20857 USA.
RP Goldstein, RZ (reprint author), Brookhaven Natl Lab, Dept Med Res, Ctr Translat NeuroImaging, POB 5000, Upton, NY 11973 USA.
EM rgoldstein@bnl.gov
RI Tomasi, Dardo/J-2127-2015
FU NCRR NIH HHS [5-MO1-RR-10710, M01 RR010710]; NIAAA NIH HHS
   [AA/ODO9481-04]; NIDA NIH HHS [1K23 DA15517-01, K23 DA015517, R03 DA
   017070-01, R03 DA017070]
NR 56
TC 31
Z9 32
U1 1
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 1053-8119
J9 NEUROIMAGE
JI Neuroimage
PD MAR
PY 2007
VL 35
IS 1
BP 194
EP 206
DI 10.1016/j.neuroimage.2006.12.004
PG 13
WC Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical
   Imaging
SC Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging
GA 145VN
UT WOS:000244894000019
PM 17236790
ER

PT J
AU Howard, RJ
   Clark, KA
   Holton, JM
   Minor, DL
AF Howard, Rebecca J.
   Clark, Kimberly A.
   Holton, James M.
   Minor, Daniel L., Jr.
TI Structural Insight into KCNQ (Kv7) Channel Assembly and Channelopathy
SO NEURON
LA English
DT Article
ID LONG-QT SYNDROME; POTASSIUM CHANNEL; K+ CHANNEL; COILED-COILS; GENOMIC
   ORGANIZATION; CARDIAC-ARRHYTHMIAS; SURFACE EXPRESSION;
   CRYSTAL-STRUCTURE; BACKBONE FREEDOM; TERMINAL DOMAIN
AB Kv7.x (KCNQ) voltage-gated potassium channels form the cardiac and auditory l(Ks) current and the neuronal M-current. The five Kv7 subtypes have distinct assembly preferences encoded by a C-terminal cytoplasmic assembly domain, the A-domain Tail. Here, we present the high-resolution structure of the Kv7.4 Adomain Tail together with biochemical experiments that show that the domain is a selfassembling, parallel, four-stranded coiled coil. Structural analysis and biochemical studies indicate conservation of the coiled coil in all Kv7 subtypes and that a limited set of interactions encode assembly specificity determinants. Kv7 mutations have prominent roles in arrhythmias, deafness, and epilepsy. The structure together with biochemical data indicate that A-domain Tail arrhythmia mutations cluster on the solvent-accessible surface of the subunit interface at a likely site of action for modulatory proteins. Together, the data provide a framework for understanding Kv7 assembly specificity and the molecular basis of a distinct set of Kv7 channelopathies.
C1 Univ Calif San Francisco, Cardiovasc Res Inst, San Francisco, CA 94158 USA.
   Univ Calif San Francisco, Chem & Chem Biol Grad Program, San Francisco, CA 94158 USA.
   Univ Calif San Francisco, Dept Biochem & Biophys, San Francisco, CA 94158 USA.
   Univ Calif San Francisco, Dept Mol & Cellular Pharmacol, San Francisco, CA 94158 USA.
   Univ Calif San Francisco, Calif Inst Quantitat Biomed Res, San Francisco, CA 94158 USA.
   Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Minor, DL (reprint author), Univ Calif San Francisco, Cardiovasc Res Inst, San Francisco, CA 94158 USA.
EM daniel.minor@ucsf.edu
OI Howard, Rebecca/0000-0003-2049-3378
FU NIDCD NIH HHS [R01 DC007664, R01 DC007664-03]
NR 69
TC 90
Z9 94
U1 2
U2 6
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0896-6273
EI 1097-4199
J9 NEURON
JI Neuron
PD MAR 1
PY 2007
VL 53
IS 5
BP 663
EP 675
DI 10.1016/j.neuron.2007.02.010
PG 13
WC Neurosciences
SC Neurosciences & Neurology
GA 149DL
UT WOS:000245127100008
PM 17329207
ER

PT J
AU Swanson, JM
   Kinsbourne, M
   Nigg, J
   Lanphear, B
   Stefanatos, GA
   Volkow, N
   Taylor, E
   Casey, BJ
   Castellanos, FX
   Wadhwa, PD
AF Swanson, James M.
   Kinsbourne, Marcel
   Nigg, Joel
   Lanphear, Bruce
   Stefanatos, Gerry A.
   Volkow, Nora
   Taylor, Eric
   Casey, B. J.
   Castellanos, F. Xavier
   Wadhwa, Pathik D.
TI Etiologic subtypes of attention-deficit/hyperactivity disorder: Brain
   imaging, molecular genetic and environmental factors and the dopamine
   hypothesis
SO NEUROPSYCHOLOGY REVIEW
LA English
DT Review
DE ADHD (or Attention-Deficit/Hyperactivity disorder); dopamine; molecular
   genetics; brain imaging; environmental risk; minimal brain dysfunction
ID DEFICIT-HYPERACTIVITY DISORDER; ANALOG CLASSROOM ASSESSMENT; D-4
   RECEPTOR GENE; ORAL METHYLPHENIDATE; EXTRACELLULAR DOPAMINE;
   PSYCHIATRIC-DISORDERS; TRANSPORTER GENE; 7-REPEAT ALLELE; GENOMEWIDE
   SCAN; FETAL-GROWTH
AB Multiple theories of Attention-Deficit/Hyperactivity Disorder (ADHD) have been proposed, but one that has stood the test of time is the dopamine deficit theory. We review the narrow literature from recent brain imaging and molecular genetic studies that has improved our understanding of the role of dopamine in manifestation of symptoms of ADHD, performance deficits on neuropsychological tasks, and response to stimulant medication that constitutes the most common treatment of this disorder. First, we consider evidence of the presence of dopamine deficits based on the recent literature that (1) confinns abnormalities in dopamine-modulated frontal-striatal circuits, reflected by size (smaller-than-average components) and function (hypoactivation); (2) clarifies the agonist effects of stimulant medication on dopaminergic mechanisms at the synaptic and circuit level of analysis; and (3) challenges the most-widely accepted ADHD-related neural abnormality in the dopamine system (higher-than-normal dopamine transporter [DAT] density). Second, we discuss possible genetic etiologies of dopamine deficits based on recent molecular genetic literature, including (1) multiple replications that confirm the association of ADHD with candidate genes related to the dopamine receptor D4 (DRD4) and the DAT; (2) replication of differences in performance of neuropsychological tasks as a function of the DRD4 genotype; and (3) multiple genome-wide linkage scans that demonstrate the limitations of this method when applied to complex disorders but implicate additional genes that may contribute to the genetic basis of ADHD. Third, we review possible environmental etiologies of dopamine deficits based on recent studies of (1) toxic substances that may affect the dopamine system in early development and contribute substantially to the etiology of ADHD; (2) fetal adaptations in dopamine systems in response to stress that may alter early development with lasting effects, as proposed by the developmental origins of health and disease hypothesis; and (3) gene-environment interactions that may moderate selective damage or adaptation of dopamine neurons. Based on these reviews, we identify critical issues about etiologic subtypes of ADHD that may involve dopamine, discuss methods that could be used to address these issues, and review old and new theories that may direct research in this area in the future.
C1 Univ Calif Irvine, Dept Pediat, Irvine, CA 92612 USA.
   New Sch Social Res, Dept Psychol, New York, NY 10011 USA.
   Michigan State Univ, Dept Psychol, E Lansing, MI 48824 USA.
   Childrens Hosp, Dept Pediat, Cincinnati, OH 45229 USA.
   Albert Einstein Med Ctr, Cognit Neurophysiol Lab, Philadelphia, PA 19141 USA.
   Natl Inst Drug Abuse, Rockville, MD USA.
   Brookhaven Natl Lab, Rockville, MD USA.
   Inst Psychiat, Dept Child Psychiat, London, England.
   Cornell Univ, Weill Coll Med, Sackler Inst, New York, NY USA.
   NYU, Dept Child Psychiat & Adolescent, New York, NY USA.
   Univ Calif Irvine, Dept Psychiat & OB GYN, Irvine, CA 92612 USA.
RP Swanson, JM (reprint author), Univ Calif Irvine, Dept Pediat, 19722 MacArthur Blvd, Irvine, CA 92612 USA.
EM jmswanso@uci.edu
OI Castellanos, Francisco/0000-0001-9192-9437
NR 147
TC 263
Z9 274
U1 10
U2 67
PU CONSULTANTS BUREAU/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1040-7308
J9 NEUROPSYCHOL REV
JI Neuropsychol. Rev.
PD MAR
PY 2007
VL 17
IS 1
BP 39
EP 59
DI 10.1007/s11065-007-9019-9
PG 21
WC Psychology, Clinical; Neurosciences
SC Psychology; Neurosciences & Neurology
GA 147PH
UT WOS:000245014400003
PM 17318414
ER

PT J
AU Masi, S
   Ade, PAR
   Bock, JJ
   Bond, JR
   Borrill, J
   Boscaleri, A
   Cabella, P
   Contaldi, CR
   Crill, BP
   de Bernardis, P
   De Gasperis, G
   De Oliveira-Costa, A
   De Troia, G
   Di Stefano, G
   Ehlers, P
   Hivon, E
   Hristov, V
   Iacoangeli, A
   Jaffe, AH
   Jones, WC
   Kisner, TS
   Lange, AE
   MacTavish, CJ
   Bettolo, CM
   Mason, P
   Mauskopf, PD
   Montroy, TE
   Nati, F
   Nati, L
   Natoli, P
   Netterfield, CB
   Pascale, E
   Piacentini, F
   Pogosyan, D
   Polenta, G
   Prunet, S
   Ricciardi, S
   Romeo, G
   Ruhl, JE
   Santini, P
   Tegmark, M
   Torbet, E
   Veneziani, M
   Vittorio, N
AF Masi, S.
   Ade, P. A. R.
   Bock, J. J.
   Bond, J. R.
   Borrill, J.
   Boscaleri, A.
   Cabella, P.
   Contaldi, C. R.
   Crill, B. P.
   de Bernardis, P.
   De Gasperis, G.
   De Oliveira-Costa, A.
   De Troia, G.
   Di Stefano, G.
   Ehlers, P.
   Hivon, E.
   Hristov, V.
   Iacoangeli, A.
   Jaffe, A. H.
   Jones, W. C.
   Kisner, T. S.
   Lange, A. E.
   MacTavish, C. J.
   Bettolo, C. Marini
   Mason, P.
   Mauskopf, P. D.
   Montroy, T. E.
   Nati, F.
   Nati, L.
   Natoli, P.
   Netterfield, C. B.
   Pascale, E.
   Piacentini, F.
   Pogosyan, D.
   Polenta, G.
   Prunet, S.
   Ricciardi, S.
   Romeo, G.
   Ruhl, J. E.
   Santini, P.
   Tegmark, M.
   Torbet, E.
   Veneziani, M.
   Vittorio, N.
TI The millimeter sky as seen with BOOMERanG
SO NEW ASTRONOMY REVIEWS
LA English
DT Article; Proceedings Paper
CT Francesco Melchiorri Memorial Conference
CY APR 12-14, 2006
CL Univ Rome, Dept Phys, Rome, ITALY
HO Univ Rome, Dept Phys
DE cosmology; cosmic microwave background anisotropy and polarization;
   galactic foreground
ID MICROWAVE BACKGROUND POLARIZATION; PROBE WMAP OBSERVATIONS; GALACTIC
   DUST EMISSION; ANGULAR POWER SPECTRUM; 2003 FLIGHT; COSMOLOGICAL
   PARAMETERS; TEMPERATURE ANISOTROPY; INFLATION; RADIATION; GAUSSIANITY
AB BOOMERanG is a balloon-borne, mm-wave scanning telescope, which measured the first images of the CMB with sub-horizon resolution in 1998. In 2003 the instrument has been flown again with polarization sensitive bolometers, and has produced maps of the Stokes parameters I, Q, U of the microwave sky. Three regions of the southern sky were surveyed: a deep (similar to 90 square degrees) and a shallow survey (similar to 750 square degrees) at high Galactic latitudes, and a survey of similar to 300 square degrees across a southern section of the Galactic plane. The experiment measured simultaneously three wide frequency bands centered at 145, 245 and 345 GHz, with an angular resolution of similar to 10 degrees. The 145 GHz temperature maps are dominated by Cosmic Microwave Background (CMB) anisotropy, which is mapped with high signal to noise ratio. The map is consistent with the pattern measured in the same region by BOOMERanG-98 and by WMAP. At 145 GHz, in the high latitude surveys, the intensity and polarization of the astrophysical foregrounds are found to be negligible with respect to the cosmological signal. At 245 and 345 GHz we detect ISD emission correlated to the 3000 GHz IRAS/DIRBE maps. The Q and U maps at high latitudes are dominated by detector noise: a power spectrum analysis allows us to extract from the maps a significant CMB polarization signal. (c) 2006 Published by Elsevier B.V.
C1 Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy.
   Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
   Cardiff Univ, Dept Phys & Astron, Cardiff, Wales.
   CALTECH, Jet Prop Lab, Pasadena, CA USA.
   Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON, Canada.
   LBNL, Computat Res Div, Berkeley, CA USA.
   CNR, IFAC, I-50127 Florence, Italy.
   CALTECH, IPAC, Pasadena, CA 91125 USA.
   Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
   Inst Astrophys, F-75014 Paris, France.
   Ist Nazl Geofis & Vulcanol, Rome, Italy.
   MIT, Dept Phys, Cambridge, MA 02139 USA.
   Univ Toronto, Dept Phys, Toronto, ON, Canada.
   CALTECH, Observ Cosmol, Pasadena, CA 91125 USA.
   Univ London Imperial Coll Sci Technol & Med, Theoret Phys Grp, London, England.
   Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy.
   Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
   Ist Nazl Fis Nucl, Sez Roma 1, Rome, Italy.
   Ist Nazl Fis Nucl, Sez Roma 2, Rome, Italy.
   Univ Alberta, Dept Phys, Edmonton, AB, Canada.
RP Masi, S (reprint author), Univ Roma La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 5, Rome, Italy.
EM silvia.masi@roma1.infn.it
RI Nati, Federico/I-4469-2016; Piacentini, Francesco/E-7234-2010; Jaffe,
   Andrew/D-3526-2009; de Gasperis, Giancarlo/C-8534-2012; 
OI Nati, Federico/0000-0002-8307-5088; Piacentini,
   Francesco/0000-0002-5444-9327; Ricciardi, Sara/0000-0002-3807-4043;
   Polenta, Gianluca/0000-0003-4067-9196; de Gasperis,
   Giancarlo/0000-0003-2899-2171; Masi, Silvia/0000-0001-5105-1439; de
   Bernardis, Paolo/0000-0001-6547-6446; ROMEO,
   Giovanni/0000-0002-5535-7803; Santini, Paola/0000-0002-9334-8705; Hivon,
   Eric/0000-0003-1880-2733
NR 46
TC 2
Z9 2
U1 0
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1387-6473
EI 1872-9630
J9 NEW ASTRON REV
JI New Astron. Rev.
PD MAR
PY 2007
VL 51
IS 3-4
BP 236
EP 243
DI 10.1016/j.newar.2006.11.063
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 148AD
UT WOS:000245046000007
ER

PT J
AU Piacentini, F
   Ade, PAR
   Bock, JJ
   Bond, JR
   Borrill, J
   Boscaleri, A
   Cabella, P
   Contaldi, CR
   Crill, BP
   de Bernardis, P
   De Gasperis, G
   de Oliveira-Costa, A
   De Troia, G
   Di Stefano, G
   Hivon, E
   Jaffe, AH
   Kisner, TS
   Jones, WC
   Lange, AE
   Marini-Bettolo, C
   Masi, S
   Mauskopf, PD
   MacTavish, CJ
   Melchiorri, A
   Montroy, TE
   Nati, F
   Nati, L
   Natoli, P
   Netterfield, CB
   Pascale, E
   Pogosyan, D
   Polenta, G
   Prunet, S
   Ricciardi, S
   Romeo, G
   Ruhl, JE
   Santini, P
   Tegmark, M
   Veneziam, M
   Vittorio, N
AF Piacentini, F.
   Ade, P. A. R.
   Bock, J. J.
   Bond, J. R.
   Borrill, J.
   Boscaleri, A.
   Cabella, P.
   Contaldi, C. R.
   Crill, B. P.
   de Bernardis, P.
   De Gasperis, G.
   de Oliveira-Costa, A.
   De Troia, G.
   Di Stefano, G.
   Hivon, E.
   Jaffe, A. H.
   Kisner, T. S.
   Jones, W. C.
   Lange, A. E.
   Marini-Bettolo, C.
   Masi, S.
   Mauskopf, P. D.
   MacTavish, C. J.
   Melchiorri, A.
   Montroy, T. E.
   Nati, F.
   Nati, L.
   Natoli, P.
   Netterfield, C. B.
   Pascale, E.
   Pogosyan, D.
   Polenta, G.
   Prunet, S.
   Ricciardi, S.
   Romeo, G.
   Ruhl, J. E.
   Santini, P.
   Tegmark, M.
   Veneziam, M.
   Vittorio, N.
TI CMB polarization with BOOMERANG 2003
SO NEW ASTRONOMY REVIEWS
LA English
DT Article; Proceedings Paper
CT Francesco Melchiorri Memorial Conference
CY APR 12-14, 2006
CL Univ Rome, Dept Phys, Rome, ITALY
HO Univ Rome, Dept Phys
DE cosmology; CMB; polarization
ID GALACTIC DUST EMISSION; MICROWAVE BACKGROUND-RADIATION; MAP-MAKING
   ALGORITHM; POWER SPECTRUM; DATA SETS; INSTRUMENT; ANISOTROPY; ARCHEOPS;
   RECEIVER; UNIVERSE
AB This paper reports results from the BOOMERANG 2003 flights, devoted to the measurement of intensity and polarization of the cosmic microwave background radiation. In particular, it is focused on the power angular power spectra and on the control of possible contamination from systematic effects and foregrounds. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy.
   Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
   Univ Cardiff Wales, Dept Phys & Astron, Cardiff, Wales.
   CALTECH, Jet Prop Lab, Pasadena, CA USA.
   Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada.
   LBNL, Computat Res Div, Berkeley, CA USA.
   CNR, Ist Fis Applicata Nello Carrara, I-50127 Florence, Italy.
   CALTECH, IPAC, Pasadena, CA 91125 USA.
   Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
   Inst Astrophys, F-75014 Paris, France.
   Ist Nazl Geofis & Vulcanol, Rome, Italy.
   MIT, Dept Phys, Cambridge, MA 02139 USA.
   Univ Toronto, Dept Phys, Toronto, ON, Canada.
   CALTECH, Observat Cosmol, Pasadena, CA 91125 USA.
   Univ London Imperial Coll Sci Technol & Med, Theoret Phys Grp, London, England.
   Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy.
   Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
   Ist Nazl Fis Nucl, Sez Roma 1, Rome, Italy.
   Ist Nazl Fis Nucl, Sez Roma 2, Rome, Italy.
   Univ Alberta, Dept Phys, Edmonton, AB, Canada.
RP Piacentini, F (reprint author), Univ Roma La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 5, Rome, Italy.
EM francesco.piacentini@roma1.infn.it
RI Jaffe, Andrew/D-3526-2009; de Gasperis, Giancarlo/C-8534-2012; Nati,
   Federico/I-4469-2016; Piacentini, Francesco/E-7234-2010; 
OI Hivon, Eric/0000-0003-1880-2733; de Gasperis,
   Giancarlo/0000-0003-2899-2171; Nati, Federico/0000-0002-8307-5088;
   Piacentini, Francesco/0000-0002-5444-9327; Ricciardi,
   Sara/0000-0002-3807-4043; Masi, Silvia/0000-0001-5105-1439; de
   Bernardis, Paolo/0000-0001-6547-6446; ROMEO,
   Giovanni/0000-0002-5535-7803; Polenta, Gianluca/0000-0003-4067-9196;
   Santini, Paola/0000-0002-9334-8705
NR 34
TC 2
Z9 2
U1 0
U2 1
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1387-6473
J9 NEW ASTRON REV
JI New Astron. Rev.
PD MAR
PY 2007
VL 51
IS 3-4
BP 244
EP 249
DI 10.1016/j.newar.2006.11.058
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 148AD
UT WOS:000245046000008
ER

PT J
AU De Troia, G
   Ade, PAR
   Bock, JJ
   Bond, JR
   Borrill, J
   Boscaleri, A
   Cabella, P
   Contaldi, CR
   Crill, BP
   de Bernardis, P
   de Gasperis, G
   de Oliveira-Costa, A
   Di Stefano, G
   Ferreira, PG
   Hivon, E
   Jaffe, A
   Kisner, T
   Kunz, M
   Jones, WC
   Lange, AE
   Masi, S
   Mauskopf, PD
   MacTavish, C
   Melchiorri, A
   Montroy, T
   Natoli, P
   Netterfield, CB
   Pascale, E
   Piacentini, F
   Pogosyan, D
   Polenta, G
   Prunet, S
   Ricciardi, S
   Romeo, G
   Ruhl, JE
   Santini, P
   Tegmark, M
   Veneziani, M
   Vittorio, N
AF De Troia, G.
   Ade, P. A. R.
   Bock, J. J.
   Bond, J. R.
   Borrill, J.
   Boscaleri, A.
   Cabella, P.
   Contaldi, C. R.
   Crill, B. P.
   de Bernardis, P.
   de Gasperis, G.
   de Oliveira-Costa, A.
   Di Stefano, G.
   Ferreira, P. G.
   Hivon, E.
   Jaffe, A.
   Kisner, T.
   Kunz, M.
   Jones, W. C.
   Lange, A. E.
   Masi, S.
   Mauskopf, P. D.
   MacTavish, C.
   Melchiorri, A.
   Montroy, T.
   Natoli, P.
   Netterfield, C. B.
   Pascale, E.
   Piacentini, F.
   Pogosyan, D.
   Polenta, G.
   Prunet, S.
   Ricciardi, S.
   Romeo, G.
   Ruhl, J. E.
   Santini, P.
   Tegmark, M.
   Veneziani, M.
   Vittorio, N.
TI Searching for non-Gaussian signals in the BOOMERanG 2003 CMB map:
   Preliminary results
SO NEW ASTRONOMY REVIEWS
LA English
DT Article
CT Francesco Melchiorri Memorial Conference
CY APR 12-14, 2006
CL Univ Rome, Dept Phys, Rome, ITALY
HO Univ Rome, Dept Phys
ID POWER SPECTRUM; FLIGHT; ANISOTROPY
AB We analyse the 145 GHz temperature map produced from the 2003 flight of BOOMERanG in search for deviations from Gaussianity. We perform a pixel space analysis computing the map's skewness, kurtosis and Minkowski functionals, as well as a Fourier space analysis computing the diagonal part the of angular bispectrum. The preliminary results presented here suggest that the data are fully consistent with the Gaussian hypothesis. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   Cardiff Univ, Dept Phys & Astron, Cardiff CF24 3YB, Wales.
   Jet Prop Lab, Pasadena, CA USA.
   Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON, Canada.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA.
   CNR, IFAC, Florence, Italy.
   Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England.
   CALTECH, IPAC, Pasadena, CA 91125 USA.
   Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
   MIT, Dept Phys, Cambridge, MA 02139 USA.
   Ist Nazl Geofis & Vulcanol, Rome, Italy.
   Univ London Imperial Coll Sci Technol & Med, Theoret Phys Grp, London, England.
   Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA.
   Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
   Univ Geneva, Dept Phys Theor, Geneva 4, Switzerland.
   CALTECH, Observ Cosmol, Pasadena, CA 91125 USA.
   Univ Toronto, Dept Phys, Toronto, ON, Canada.
   Ist Nazl Fis Nucl, Sez Roma 1, Rome, Italy.
   Ist Nazl Fis Nucl, Sez Roma 2, Rome, Italy.
   Univ Alberta, Dept Phys, Edmonton, AB, Canada.
   Inst Astrophys, F-75014 Paris, France.
RP de Bernardis, P (reprint author), Univ Roma La Sapienza, Dipartimento Fis, Piazzale A Moro 2, I-00185 Rome, Italy.
EM paolo.debernardis@roma1.infn.it
RI Jaffe, Andrew/D-3526-2009; de Gasperis, Giancarlo/C-8534-2012;
   Piacentini, Francesco/E-7234-2010; 
OI Hivon, Eric/0000-0003-1880-2733; Santini, Paola/0000-0002-9334-8705; de
   Gasperis, Giancarlo/0000-0003-2899-2171; Piacentini,
   Francesco/0000-0002-5444-9327; Polenta, Gianluca/0000-0003-4067-9196;
   Masi, Silvia/0000-0001-5105-1439; de Bernardis,
   Paolo/0000-0001-6547-6446; ROMEO, Giovanni/0000-0002-5535-7803;
   Ricciardi, Sara/0000-0002-3807-4043
NR 20
TC 3
Z9 3
U1 0
U2 0
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1387-6473
J9 NEW ASTRON REV
JI New Astron. Rev.
PD MAR
PY 2007
VL 51
IS 3-4
BP 250
EP 255
DI 10.1016/j.newar.2006.11.064
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 148AD
UT WOS:000245046000009
ER

PT J
AU Boynton, PE
   Bonicalzi, RM
   Kalet, AM
   Kleczewski, AM
   Lingwood, JK
   McKenney, KJ
   Moore, MW
   Steffen, JH
   Berg, EC
   Cross, WD
   Newman, RD
   Gephart, RE
AF Boynton, P. E.
   Bonicalzi, R. M.
   Kalet, A. M.
   Kleczewski, A. M.
   Lingwood, J. K.
   McKenney, K. J.
   Moore, M. W.
   Steffen, J. H.
   Berg, E. C.
   Cross, W. D.
   Newman, R. D.
   Gephart, R. E.
TI Gravitation physics at BGPL
SO NEW ASTRONOMY REVIEWS
LA English
DT Article; Proceedings Paper
CT Francesco Melchiorri Memorial Conference
CY APR 12-14, 2006
CL Univ Rome, Dept Phys, Rome, ITALY
HO Univ Rome, Dept Phys
ID CRYOGENIC TORSION PENDULUM; LAW
AB We report progress on a program of gravitational physics experiments using cryogenic torsion pendula undergoing large-amplitude torsion oscillation. This program includes tests of the gravitational inverse square law and of the weak equivalence principle. Here, we describe our ongoing search for inverse-square-law violation at a strength down to 10(-5) of standard gravity. The low-vibration environment provided by the Battelle Gravitation Physics Laboratory (BGPL) is uniquely suited to this study. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Washington, Seattle, WA 98195 USA.
   Univ Calif Irvine, Irvine, CA 92697 USA.
   Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Boynton, PE (reprint author), Univ Washington, Box MS 351560, Seattle, WA 98195 USA.
EM boynton@phys.washington.edu
NR 12
TC 4
Z9 4
U1 2
U2 3
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 1387-6473
J9 NEW ASTRON REV
JI New Astron. Rev.
PD MAR
PY 2007
VL 51
IS 3-4
BP 334
EP 340
DI 10.1016/j.newar.2006.11.035
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 148AD
UT WOS:000245046000023
ER

PT J
AU Basunia, MS
AF Basunia, M. S.
TI Nuclear data sheets for A=213
SO NUCLEAR DATA SHEETS
LA English
DT Review
ID NEUTRON-DEFICIENT FRANCIUM; LINE ALPHA SPECTROSCOPY; PRE-ACTINIDE
   NUCLEI; PB-213 GROUND-STATE; HEAVY-ION REACTIONS; HIGH-SPIN ISOMERS;
   MAGNETIC-MOMENTS; DECAY PROPERTIES; RADIUM ISOTOPES; QUADRUPOLE-MOMENTS
AB Evaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for till nuclei with mass number A=213. This evaluation for A=213 supersedes the earlier one by Y. A. Akovali (1992Ak01), published in Nuclear Data Sheets 66, 237 (1992).
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Basunia, MS (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
NR 169
TC 13
Z9 13
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD MAR
PY 2007
VL 108
IS 3
BP 633
EP +
DI 10.1016/j.nds.2007.02.002
PG 46
WC Physics, Nuclear
SC Physics
GA 160PX
UT WOS:000245955900002
ER

PT J
AU Browne, E
AF Browne, E.
TI Nuclear data sheets for A=234
SO NUCLEAR DATA SHEETS
LA English
DT Review
ID INTERACTING-BOSON MODEL; EVEN-EVEN NUCLEI; FISSION HALF-LIVES;
   INTERNAL-CONVERSION COEFFICIENTS; MULTINUCLEON TRANSFER-REACTIONS;
   HEAVY-FRAGMENT RADIOACTIVITIES; KINETIC-ENERGY DISTRIBUTIONS; 2-NUCLEON
   TRANSFER-REACTIONS; 2-NEUTRON TRANSFER-REACTIONS; RAY EMISSION
   PROBABILITIES
AB The evaluators present in this publication spectroscopic data and level schemes from radioactive decay and nuclear reactions for all isobars with mass number A=234. This evaluation includes the discovery of two activities: Cm-234., and Bk-234, which decay with half-lives of 51 s (2002CaZZ) and approximate to 140 s (2003MoZX,2003MoZT), respectively.
C1 Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA.
RP Browne, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
NR 473
TC 14
Z9 15
U1 0
U2 4
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0090-3752
EI 1095-9904
J9 NUCL DATA SHEETS
JI Nucl. Data Sheets
PD MAR
PY 2007
VL 108
IS 3
BP 681
EP +
DI 10.1016/j.nds.2007.02.003
PG 90
WC Physics, Nuclear
SC Physics
GA 160PX
UT WOS:000245955900003
ER

PT J
AU Larson, TK
   Moody, FJ
   Wilson, GE
   Brown, WL
   Frepoli, C
   Hartz, J
   Woods, BG
   Oriani, L
AF Larson, T. K.
   Moody, F. J.
   Wilson, G. E.
   Brown, W. L.
   Frepoli, C.
   Hartz, J.
   Woods, B. G.
   Oriani, L.
TI Iris small break loca phenomena identification and ranking table (PIRT)
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
ID REACTOR
AB The international reactor innovative and secure (IRIS) is a modular pressurized water reactor with an integral configuration (all primary system components - reactor core, internals, pumps, steam generators, pressurizer, and control rod drive mechanisms - are inside the reactor vessel). The IRIS plant conceptual design was completed in 2001 and the preliminary design is currently underway. The pre-application licensing process with the United States Nuclear Regulatory Commission (USNRC) started in October 2002.
   The first line of defense in IRIS is to eliminate event initiators that could potentially lead to core damage. If it is not possible to eliminate certain accidents altogether, then the design inherently reduces their consequences and/or decreases their probability of occurring. One of the most obvious advantages of the IRIS Safety-by-Design (TM) approach is the elimination of large break loss-of-coolant accidents (LBLOCAs), since no large primary penetrations of the reactor vessel or large loop piping exist.
   While the IRIS Safety-by-Design (TM) approach is a logical step in the effort to produce advanced reactors, the desired advances in safety must still be demonstrated in the licensing arena. With the elimination of LBLOCA, an important next consideration is to show the IRIS design fulfills the promise of increased safety also for small break LOCAs (SBLOCAs). Accordingly, the SBLOCA phenomena identification and ranking table (PIRT) project was established. The primary objective of the IRIS SBLOCA PIRT project was to identify the relative importance of phenomena in the IRIS response to SBLOCAs. This relative importance, coupled with the current relative state of knowledge for the phenomena, provides a framework for the planning of the continued experimental and analytical efforts.
   To satisfy the SBLOCA PIRT project objectives, Westinghouse organized an expert panel whose members were carefully selected to insure that the PIRT results reflect internationally recognized experience in reactor safety analysis, and were not biased by program preconceptions internal to the IRIS program.
   The SBLOCA PIRT Panel concluded that continued experimental data and analytical tool development in the following areas, in decreasing level of significance, are perceived as important with respect to satisfying the safety analysis and licensing objectives of the IRIS program: (1) steam generator; (2) pressure suppression system, containment dry well and their interactions; (3) emergency heat removal system; (4) core, long-term gravity makeup system, automatic depressurization system, and pressurizer; (5) direct vessel injection system and reactor vessel cavity. (c) 2006 Elsevier B.V. All rights reserved.
C1 Westinghouse Elect Corp, Dept Sci & Technol, Pittsburgh, PA 15235 USA.
   Idaho Natl Lab, Idaho Falls, ID 83415 USA.
   KatJon Serv Inc, Idaho Falls, ID 83404 USA.
   Westinghouse Elect Corp, Div Nucl Sci, Pittsburgh, PA 15230 USA.
   Oregon State Univ, Corvallis, OR 97331 USA.
RP Oriani, L (reprint author), Westinghouse Elect Corp, Dept Sci & Technol, 1344 Beulah Rd, Pittsburgh, PA 15235 USA.
EM orianil@westinghouse.com
NR 27
TC 5
Z9 5
U1 0
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD MAR
PY 2007
VL 237
IS 6
BP 618
EP 626
DI 10.1016/j.nucengdes.2006.09.028
PG 9
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 146YT
UT WOS:000244971300006
ER

PT J
AU Jeong, H
   Ha, K
   Kwon, Y
   Lee, Y
   Hahn, D
   Cahalan, JE
   Dunn, FE
AF Jeong, Hae-yong
   Ha, Kwi-seok
   Kwon, Young-min
   Lee, Yong-bum
   Hahn, Dohee
   Cahalan, James E.
   Dunn, Floyd E.
TI Evaluation of the conduction shape factor with a CFD code for a
   liquid-metal heat transfer in heated triangular rod bundles
SO NUCLEAR ENGINEERING AND DESIGN
LA English
DT Article
ID SUBCHANNEL ANALYSIS
AB A heat transfer due to conduction through a coolant itself is not negligible in a liquid-metal cooled reactor (LMR). This portion of a heat transfer is frequently described with a conduction shape factor during the thermal-hydraulic design of an LMR. The conduction shape factor, which is highly dependent on a pitch-to-diameter (PID) ratio, is defined as the ratio of the local conduction heat flux at a gap between two subchannels to the reference heat flux calculated by the averaged subchannel temperatures. The shape factors in heated triangular rod arrays for three different pitch-to-diameter ratios are generated through CFX calculations in the present study. The flow paths of 1.0-2.0 m in length are meshed into 180,000-360,000 volumes depending on the flow velocities. The SSG Reynolds stress model is used as a turbulent model in the calculations. The evaluated data fell between the heated-rod data and the plane-source data obtained by theoretical investigations. The conduction shape factors were found to be independent of the heating pattern of the rod arrays. Based on the evaluated data, a correlation for a liquid sodium coolant is suggested, which will improve the accuracy of the subchannel analysis codes for the thermal-hydraulic design of an LMR. When it is compared with the existing correlations, the suggested correlation is expected to enhance the reliability of the conduction shape factor because the data is evaluated by a more realistic numerical experiment. (c) 2006 Elsevier B.V. All rights reserved.
C1 Korea Atom Energy Res Inst, Fluid Engn Div, Taejon 305353, South Korea.
   Argonne Natl Lab, Argonne, IL 60439 USA.
RP Jeong, H (reprint author), Korea Atom Energy Res Inst, Fluid Engn Div, 150 Dugjin Dong, Taejon 305353, South Korea.
EM hyjeong@kaeri.re.kr
NR 12
TC 2
Z9 3
U1 0
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0029-5493
J9 NUCL ENG DES
JI Nucl. Eng. Des.
PD MAR
PY 2007
VL 237
IS 6
BP 648
EP 654
DI 10.1016/j.nucengdes.2006.09.030
PG 7
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 146YT
UT WOS:000244971300008
ER

PT J
AU McDonald, DC
   Cordey, JG
   Thomsen, K
   Kardaun, OJWF
   Snipes, JA
   Greenwald, M
   Sugiyama, L
   Ryter, F
   Kus, A
   Stober, J
   DeBoo, JC
   Petty, CC
   Bracco, G
   Romanelli, M
   Cui, Z
   Liu, Y
   Miura, Y
   Shinohara, K
   Tsuzuki, K
   Kamada, Y
   Takizuka, T
   Urano, H
   Valovic, M
   Akers, R
   Brickley, C
   Sykes, A
   Walsh, MJ
   Kaye, SM
   Bush, C
   Hogewei, D
   Martin, YR
   Cote, A
   Pacher, G
   Ongena, J
   Imbeaux, F
   Hoang, GT
   Lebedev, S
   Chudnovskiy, A
   Leonov, V
AF McDonald, D. C.
   Cordey, J. G.
   Thomsen, K.
   Kardaun, O. J. W. F.
   Snipes, J. A.
   Greenwald, M.
   Sugiyama, L.
   Ryter, F.
   Kus, A.
   Stober, J.
   DeBoo, J. C.
   Petty, C. C.
   Bracco, G.
   Romanelli, M.
   Cui, Z.
   Liu, Y.
   Miura, Y.
   Shinohara, K.
   Tsuzuki, K.
   Kamada, Y.
   Takizuka, T.
   Urano, H.
   Valovic, M.
   Akers, R.
   Brickley, C.
   Sykes, A.
   Walsh, M. J.
   Kaye, S. M.
   Bush, C.
   Hogewei, D.
   Martin, Y. R.
   Cote, A.
   Pacher, G.
   Ongena, J.
   Imbeaux, F.
   Hoang, G. T.
   Lebedev, S.
   Chudnovskiy, A.
   Leonov, V.
TI Recent progress on the development and analysis of the ITPA global
   H-mode confinement database
SO NUCLEAR FUSION
LA English
DT Review
ID ALCATOR C-MOD; DIII-D TOKAMAK; START SPHERICAL TOKAMAK; ENERGY
   CONFINEMENT; HIGH-DENSITY; PLASMA-CONFINEMENT; NONDIMENSIONAL TRANSPORT;
   PARTICLE CONFINEMENT; PEDESTAL DATABASES; PROFILE DATABASE
AB This paper describes the updates to and analysis of the International Tokamak Physics Activity (ITPA) Global H-Mode Confinement Database version 3 (DB3) over the period 1994-2004. Global data, for the energy confinement time and its controlling parameters, have now been collected from 18 machines of different sizes and shapes: ASDEX. ASDEX Upgrade, C-Mod, COMPASS-D, DIII-D, JET, JFT-2M, JT-60U, MAST, NSTX, PBX-M, PDX, START, T-10, TCV, TdeV, TFTR and TUMAN-3M. The database now contains 10382 data entries from 3762 plasma discharges, including data from deuterium-tritium experiments, low-aspect ratio plasmas, dimensionless parameter experiments and plasmas. DB3 also contains an increased amount of data from a range of diverted machines and further data at high triangularity, high density and high current. A wide range of physics studies has been performed on DB3 with particular progress made in the separation of core and edge behaviour, dimensionless parameter analyses and the comparison of the database with one-dimensional transport codes. The errors in the physics variables of the database have also been studied and this has led to the use of errors in variables fits. A key aim of the database has always been to provide a basis for estimating the energy confinement properties of next step machines such as ITER, and so the impact of the database and its analysis on such machines is also discussed.
C1 UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
   EFDA Close Support Unit, D-85740 Garching, Germany.
   MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA.
   Gen Atom Co, San Diego, CA USA.
   Assoc Euratom ENEA Fus, Frascati, Italy.
   SW Inst Phys, Chengdu, Peoples R China.
   Japan Atom Energy Res Inst, Naka Fus Res Estab, Naka, Ibaraki 31101, Japan.
   Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
   FOM, Inst Plasmafis, Nieuwegein, Netherlands.
   EURATOM, EPFL, CRPP, Lausanne, Switzerland.
   Ctr Canadien Fus Magnet, Varennes, PQ J3X 1S1, Canada.
   Assoc EURATOM Belgium State, ERM KMS, LPP, Brussels, Belgium.
   CEA Cadarache, DSM, DRFC, EURATOM Assoc, St Paul Les Durance, France.
   Russian Acad Sci, AF Ioffe Inst, St Petersburg 196140, Russia.
   Russell Res Ctr, Kurchatov Inst, Nucl Fus Inst, Moscow, Russia.
RP McDonald, DC (reprint author), UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.
EM dmcd@jet.uk
RI Imbeaux, Frederic/A-7614-2013; lebedev, sergei/K-2379-2013; 
OI Greenwald, Martin/0000-0002-4438-729X
NR 123
TC 31
Z9 31
U1 0
U2 20
PU INT ATOMIC ENERGY AGENCY
PI VIENNA
PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA
SN 0029-5515
J9 NUCL FUSION
JI Nucl. Fusion
PD MAR
PY 2007
VL 47
IS 3
BP 147
EP 174
DI 10.1088/0029-5515/47/3/001
PG 28
WC Physics, Fluids & Plasmas
SC Physics
GA 157OU
UT WOS:000245730600001
ER

PT J
AU van Milligen, BP
   Carreras, BA
   Lynch, VE
   Sanchez, R
AF van Milligen, B. Ph.
   Carreras, B. A.
   Lynch, V. E.
   Sanchez, R.
TI Pulse propagation in a simple probabilistic transport model
SO NUCLEAR FUSION
LA English
DT Article
ID ANOMALOUS TRANSPORT; RANDOM-WALKS
AB The response to perturbations of a simplified transport model is studied. The model is used as a paradigmatic example of transport controlled by a critical gradient. Long-time system behaviour is diffusive when most of the system is sub-critical. However, when the critical mechanism becomes significant, it is observed to dominate the system behaviour at both short- and long-time scales. While the pulse amplitude decays in an approximately diffusive manner at long times for weakly critical situations, the pulse shape is not self-similar.
C1 CIEMAT Fus, Asociac EURATOM, Madrid 28040, Spain.
   Oak Ridge Natl Lab, Div Fus Energy, Oak Ridge, TN 37831 USA.
RP van Milligen, BP (reprint author), CIEMAT Fus, Asociac EURATOM, Avda Compultense 22, Madrid 28040, Spain.
EM boudewijn.vanmilligen@ciemat.es
RI Sanchez, Raul/C-2328-2008; Lynch, Vickie/J-4647-2012; van Milligen,
   Boudewijn/H-5121-2015
OI Lynch, Vickie/0000-0002-5836-7636; van Milligen,
   Boudewijn/0000-0001-5344-6274
NR 19
TC 4
Z9 4
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0029-5515
EI 1741-4326
J9 NUCL FUSION
JI Nucl. Fusion
PD MAR
PY 2007
VL 47
IS 3
BP 189
EP 195
DI 10.1088/0029-5515/47/3/004
PG 7
WC Physics, Fluids & Plasmas
SC Physics
GA 157OU
UT WOS:000245730600004
ER

PT J
AU Cirilli, M
   Kortner, O
   Orestano, D
   Petrucci, F
   Rothberg, J
   van Eldik, N
   van Kesteren, Z
   Verducci, M
   Woudstra, M
AF Cirilli, Manuela
   Kortner, Oliver
   Orestano, Domizia
   Petrucci, Fabrizio
   Rothberg, Joe
   van Eldik, Niels
   van Kesteren, Zdenko
   Verducci, Monica
   Woudstra, Martin
TI Conditions database and calibration software framework for ATLAS
   monitored drift tube chambers
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE gas detectors; ATLAS; MDT; calibration
AB The size and complexity of LHC experiments raise unprecedented challenges not only in terms of detector design, construction and operation, but also in terms of software models and data persistency. One of the most challenging tasks is the calibration of the 375,000 Monitored Drift Tubes (MDTs) that will be used as precision tracking detectors in the Muon Spectrometer of the ATLAS experiment. This paper reviews the status of the MDT Calibration software and computing model. In particular, the options for a dedicated database are described. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Michigan, Ann Arbor, MI 48109 USA.
   Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
   Univ Roma Tre, I-00146 Rome, Italy.
   INFN Roma 3, I-00146 Rome, Italy.
   Univ Washington, Seattle, WA 98195 USA.
   NIKHEF H, NL-1098 Amsterdam, Netherlands.
   CERN, CH-1211 Geneva, Switzerland.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
RP Cirilli, M (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA.
EM Manuela.cirilli@cern.ch
RI Petrucci, Fabrizio/G-8348-2012
OI Petrucci, Fabrizio/0000-0002-5278-2206
NR 4
TC 1
Z9 1
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 38
EP 39
DI 10.1016/j.nima.2006.10.162
PG 2
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400015
ER

PT J
AU Repond, J
AF Repond, Jose
TI Calorimetry at the International Linear Collider
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE calorimetry; Linear Collider; Particle Flow Algorithms
AB The physics potential of the International Linear Collider depends critically on the jet energy resolution of its detector. Detector concepts are being developed which optimize the jet energy resolution, with the aim of achieving sigma(jet) = 30%/root E-jet. Under the assumption that Particle Flow Algorithms (PFAs), which combine tracking and calorimeter information to reconstruct the energy of hadronic jets, can provide this unprecedented jet energy resolution, calorimeters with very fine granularity are being developed. After a brief introduction outlining the principles of PFAs, the current status of various calorimeter prototype construction projects and their plans for the next few years will be reviewed. (c) 2006 Elsevier B.V. All rights reserved.
C1 Argonne Natl Lab, Argonne, IL USA.
RP Repond, J (reprint author), Argonne Natl Lab, Argonne, IL USA.
EM respond@hep.anl.gov
NR 2
TC 8
Z9 8
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 211
EP 214
DI 10.1016/j.nima.2006.10.332
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400072
ER

PT J
AU Battaglia, M
AF Battaglia, Marco
TI Response simulation of CMOS pixel sensors for the ILC vertex tracker
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE ILC; monolithic pixel sensors
AB This paper reports preliminary results of a simulation of CMOS Monolithic active pixel sensors for Vertex Tracker application at the International Linear Collider. Published by Elsevier B.V.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Battaglia, M (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM MBattaglia@lbl.gov
NR 10
TC 9
Z9 9
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 274
EP 276
DI 10.1016/j.nima.2006.10.233
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400092
ER

PT J
AU Li, Z
   Abreu, M
   Anbinderis, P
   Anbinderis, T
   D'Ambrosio, N
   de Boer, W
   Borchi, E
   Borer, K
   Bruzzi, M
   Buontempo, S
   Chen, W
   Cindro, V
   Dierlamm, A
   Eremin, V
   Gaubas, E
   Gorbatenko, V
   Grigoriev, E
   Hauler, F
   Heijne, E
   Heising, S
   Hempel, O
   Herzog, R
   Harkonen, J
   Ilyashenko, I
   Janos, S
   Jungermann, L
   Kalesinskas, V
   Kapturauskas, J
   Laiho, R
   Luukka, P
   Mandic, I
   De Masi, R
   Menichelli, D
   Mikuz, M
   Militaru, O
   Nimikosky, TO
   O'Shea, V
   Pagano, S
   Paul, S
   Plotrzkowski, K
   Pretzl, K
   Mendes, PR
   Rouby, X
   Ruggiero, G
   Smith, K
   Sonderegger, P
   Sousa, P
   Tuominen, E
   Tuovinen, E
   Verbitskaya, E
   Vaitkus, J
   Wobst, E
   Zavrtanik, M
AF Li, Zheng
   Abreu, M.
   Anbinderis, P.
   Anbinderis, T.
   D'Ambrosio, N.
   de Boer, W.
   Borchi, E.
   Borer, K.
   Bruzzi, M.
   Buontempo, S.
   Chen, W.
   Cindro, V.
   Dierlamm, A.
   Eremin, V.
   Gaubas, E.
   Gorbatenko, V.
   Grigoriev, E.
   Hauler, F.
   Heijne, E.
   Heising, S.
   Hempel, O.
   Herzog, R.
   Harkonen, J.
   Ilyashenko, I.
   Janos, S.
   Jungermann, L.
   Kalesinskas, V.
   Kapturauskas, J.
   Laiho, R.
   Luukka, P.
   Mandic, I.
   De Masi, Rita
   Menichelli, D.
   Mikuz, M.
   Militaru, O.
   Nimikosky, T. O.
   O'Shea, V.
   Pagano, S.
   Paul, S.
   Plotrzkowski, K.
   Pretzl, K.
   Mendes, P. Rato
   Rouby, X.
   Ruggiero, G.
   Smith, K.
   Sonderegger, P.
   Sousa, P.
   Tuominen, E.
   Tuovinen, E.
   Verbitskaya, E.
   Vaitkus, J.
   Wobst, E.
   Zavrtanik, M.
TI Development of cryogenic Si detectors by CERN RD39 Collaboration for
   ultra radiation hardness in SLHC environment
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE Si cryogenic detectors; CCE; current injection; trapping freeze-out
ID SILICON DETECTORS; TEMPERATURES; INJECTION; NEUTRONS
AB There are two key approaches in our CERN RD 39 Collaboration efforts to obtain ultra-radiation-hard Si detectors: (1) use of the charge/current injection to manipulate the detector internal electric field in such a way that it can be depleted at a modest bias voltage at cryogenic temperature range (<= 150 K), and (2) freezing out of the trapping centers that affects the CCE at cryogenic temperatures lower than that of the liquid nitrogen (LN2) temperature.
   In our first approach, we have developed the advanced radiation hard detectors using charge or current injection, the current injected diodes (CID). In a CID, the electric field is controlled by injected current, which is limited by the space charge, yielding a nearly uniform electric field in the detector, independent of the radiation fluence. In our second approach, we have developed models of radiation-induced trapping levels and the physics of their freezing out at cryogenic temperatures. (c) 2006 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
   Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia.
   LIP, P-1000 Lisbon, Portugal.
   Univ Vilnius, Inst Mat Sci & Appl Res, LT-2040 Vilnius, Lithuania.
   Inst Cibernet E Caianiello, I-80078 Pozzuoli, MA, Italy.
   Univ Karlsruhe, IEKP, D-76128 Karlsruhe, Germany.
   Univ Florence, Dipartimento Energet, I-50139 Florence, Italy.
   Univ Bern, Lab Hochenergiephys, CH-3012 Bern, Switzerland.
   CERN, CH-1211 Geneva, Switzerland.
   Jozef Stefan Inst, Exp Particle Phys Dept, Ljubljana 1001, Slovenia.
   Univ Geneva, Dept Radiol, CH-1211 Geneva, Switzerland.
   ILK Dresden, D-01309 Dresden, Germany.
   Helsinki Inst Phys, Helsinki 00014, Finland.
   Univ Turku, Wihuri Phys Lab, FI-20014 Turku, Finland.
   Tech Univ Munich, Phys Dept E18, D-85748 Garching, Germany.
   Univ Catholique Louvain, B-1348 Louvain, Belgium.
   Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
RP Li, Z (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
EM zhengl@bnl.gov
RI Verbitskaya, Elena/D-1521-2014; Zavrtanik, Marko/A-1524-2008; Bruzzi,
   Mara/K-1326-2015; Pagano, Sergio/C-5332-2008; Paul, Stephan/F-7596-2015;
   Rato Mendes, Pedro/F-8827-2010; Grigoriev, Eugene/K-6650-2013; O'Shea,
   Val/G-1279-2010; Paul, Stephan/K-9237-2016; Tuominen, Eija/A-5288-2017
OI Abreu, Maria Conceicao/0000-0003-0093-7496; D'Ambrosio,
   Nicola/0000-0001-9849-8756; Luukka, Panja/0000-0003-2340-4641;
   Zavrtanik, Marko/0000-0001-5606-6912; Bruzzi, Mara/0000-0001-7344-8365;
   Pagano, Sergio/0000-0001-6894-791X; Paul, Stephan/0000-0002-8813-0437;
   Rato Mendes, Pedro/0000-0001-9929-0869; Grigoriev,
   Eugene/0000-0001-7235-9715; O'Shea, Val/0000-0001-7183-1205; Paul,
   Stephan/0000-0002-8813-0437; Tuominen, Eija/0000-0002-7073-7767
NR 11
TC 4
Z9 4
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 305
EP 310
DI 10.1016/j.nima.2006.10.232
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400101
ER

PT J
AU Abulencia, A
   Azzurri, P
   Cochran, E
   Dittmann, J
   Donati, S
   Efron, J
   Erbacher, R
   Errede, D
   Fedorko, I
   Flanagan, G
   Forrest, R
   Gartner, J
   Gerberich, H
   Glokaris, N
   Hewamanage, S
   Holm, S
   Hughes, R
   Ivanov, A
   Johnson, M
   Jones, T
   Junk, T
   Kasten, M
   Kilminster, B
   Klein, R
   Krumnack, N
   Lannon, K
   Levine, S
   McKim, J
   Mokos, R
   Olivito, D
   Parks, B
   Pitts, K
   Rogers, E
   Schmidt, EE
   Scott, L
   Shaw, T
   Slaunwhite, J
   Soha, A
   Staveris-Polykalas, A
   Veramendi, G
   Wilson, JS
   Wilson, PJ
   Winer, B
AF Abulencia, A.
   Azzurri, P.
   Cochran, E.
   Dittmann, J.
   Donati, S.
   Efron, J.
   Erbacher, R.
   Errede, D.
   Fedorko, I.
   Flanagan, G.
   Forrest, R.
   Gartner, J.
   Gerberich, H.
   Glokaris, N.
   Hewamanage, S.
   Holm, S.
   Hughes, R.
   Ivanov, A.
   Johnson, M.
   Jones, T.
   Junk, T.
   Kasten, M.
   Kilminster, B.
   Klein, R.
   Krumnack, N.
   Lannon, K.
   Levine, S.
   McKim, J.
   Mokos, R.
   Olivito, D.
   Parks, B.
   Pitts, K.
   Rogers, E.
   Schmidt, E. E.
   Scott, L.
   Shaw, T.
   Slaunwhite, J.
   Soha, A.
   Staveris-Polykalas, A.
   Veramendi, G.
   Wilson, J. S.
   Wilson, P. J.
   Winer, B.
TI The CDF II eXtremely Fast Tracker upgrade
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE CDF; XFT upgrade; online track processor; trigger
AB The CDF II eXtremely Fast Tracker is the trigger track processor which reconstructs charged particle tracks in the transverse plane of the CDF II central outer tracking chamber. The system is now being upgraded to perform a three dimensional track reconstruction. A review of the upgrade is presented here. (c) 2006 Elsevier B.V. All rights reserved.
C1 Natl & Capodistrian Univ Athens, Athens 10679, Greece.
   Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
   Univ Illinois, Urbana, IL 61801 USA.
   Univ Pisa, Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
   Univ Siena, I-56127 Pisa, Italy.
   Scuola Normale Super Pisa, I-56127 Pisa, Italy.
   Ohio State Univ, Columbus, OH 43210 USA.
   Baylor Univ, Waco, TX 76796 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Purdue Univ, W Lafayette, IN 47907 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Fedorko, I (reprint author), Natl & Capodistrian Univ Athens, Athens 10679, Greece.
EM ivan.fedorko@pi.infn.it
RI Ivanov, Andrew/A-7982-2013
OI Ivanov, Andrew/0000-0002-9270-5643
NR 3
TC 1
Z9 1
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 358
EP 360
DI 10.1016/j.nima.2006.10.204
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400118
ER

PT J
AU Adelman, J
   Annovi, A
   Aoki, M
   Bardi, A
   Bari, M
   Bellinger, J
   Bitossi, M
   Bogdan, M
   Carosi, R
   Catastini, P
   Cerri, A
   Chappa, S
   Dell'Orso, M
   Di Ruzza, B
   Furic, IK
   Gianetti, P
   Giovacchini, P
   Liu, TH
   Maruyama, T
   Pedron, I
   Piendibene, M
   Pitkanen, M
   Riesert, B
   Rescigno, M
   Ristori, L
   Sanders, H
   Sartori, L
   Shochet, M
   Simon, B
   Spinella, F
   Torre, S
   Tripiccione, R
   Tang, F
   Yang, UK
   Zanetti, AM
AF Adelman, J.
   Annovi, A.
   Aoki, M.
   Bardi, A.
   Bari, M.
   Bellinger, J.
   Bitossi, M.
   Bogdan, M.
   Carosi, R.
   Catastini, P.
   Cerri, A.
   Chappa, S.
   Dell'Orso, M.
   Di Ruzza, B.
   Furic, Ivan K.
   Gianetti, P.
   Giovacchini, P.
   Liu, T. H.
   Maruyama, T.
   Pedron, I.
   Piendibene, M.
   Pitkanen, M.
   Riesert, B.
   Rescigno, M.
   Ristori, L.
   Sanders, H.
   Sartori, L.
   Shochet, M.
   Simon, B.
   Spinella, F.
   Torre, S.
   Tripiccione, R.
   Tang, F.
   Yang, U. K.
   Zanetti, A. M.
TI The Silicon Vertex Trigger upgrade at CDF
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE vertexing; trigger; online tracking; data acquisition; real-time pattern
   recognition; position-sensitive detectors
ID PERFORMANCE
AB The Silicon Vertex Trigger (SVT) in the CDF experiment at Fermilab performs fast and precise track finding and fitting at the second trigger level and has been a crucial element in data acquisition for Run II physics' However, as luminosity rises, multiple interactions increase the complexity of events and thus the SVT processing time, reducing the amount of data CDF can record. The SVT upgrade aims to increase the SVT processing power to restore the original CDF DAQ capability at high luminosity. We describe the SVT upgrade, consisting of a new Associative Memory 16 times larger than the existing one, and new faster Track Fitter and Hit Buffer boards to take advantage of these patterns. We describe the existing system, the upgrade, tests and. performance. (c) 2006 Published by Elsevier B.V.
C1 Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy.
   Scuola Normale Super Pisa, I-56100 Pisa, Italy.
   Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
   Univ Wisconsin, Madison, WI 53706 USA.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Ist Nazl Fis Nucl, Sez Rome, I-00173 Rome, Italy.
   Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, Sez Trieste, I-34012 Trieste, Italy.
RP Furic, IK (reprint author), Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA.
EM ikfuric@hep.uchicago.edu
RI Zanetti, Anna/I-3893-2012; Annovi, Alberto/G-6028-2012; 
OI Annovi, Alberto/0000-0002-4649-4398; tripiccione,
   raffaele/0000-0002-8516-2492; Torre, Stefano/0000-0002-7565-0118
NR 9
TC 27
Z9 27
U1 3
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 361
EP 364
DI 10.1016/j.nima.2006.10.383
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400119
ER

PT J
AU Giachero, A
   Guardincerri, E
   Musico, P
   Pallavicini, M
   Ottonello, P
AF Giachero, A.
   Guardincerri, E.
   Musico, P.
   Pallavicini, M.
   Ottonello, P.
TI Design and performances of a multichannel high resolution simultaneous
   sampling ADC card with on-board data elaboration capabilities
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE data acquisition; VME; CUORE
AB The first prototype for the CUORE digitizing board (CDB) has been realized and characterized by the INFN Genova group. The board has a 6U VME format (233 x 280 mm), 12 independent inputs, buffering capabilities and is fully programmable via VME interface. Each channel has auto-triggering capabilities, is completely independent and the sampling circuit has zero dead time. Each input is equipped with an 18 bit ADC whose sampling speed is programmable up to a maximum of 5 kHz. The measured resolution is I LSB r.m.s. A description of the board is provided and its measured performances are shown. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lab Nazl Gran Sasso, I-67010 Laquila, Italy.
   Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
   Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
RP Guardincerri, E (reprint author), Lawrence Berkeley Natl Lab, Div Nucl Sci, Mail Stop 50B-5203,1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM EGuardincerri@lbl.gov
RI Pallavicini, Marco/G-5500-2012; Giachero, Andrea/I-1081-2013
OI Pallavicini, Marco/0000-0001-7309-3023; Giachero,
   Andrea/0000-0003-0493-695X
NR 1
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 365
EP 367
DI 10.1016/j.nima.2006.10.270
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400120
ER

PT J
AU Dinardo, ME
   Cardoso, G
   Hoff, J
   Manghisoni, M
   Mekkaoui, A
   Moroni, L
   Ratti, L
   Re, V
   Valsecchi, F
   Yarema, R
AF Dinardo, M. E.
   Cardoso, G.
   Hoff, J.
   Manghisoni, M.
   Mekkaoui, A.
   Moroni, L.
   Ratti, L.
   Re, V.
   Valsecchi, F.
   Yarema, R.
TI First prototype of a silicon microstrip detector with the data-driven
   readout chip FSSR2 for a tracking-based trigger system
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE data-driven readout; forward tracker; FSSR; silicon microstrips
ID BTEV
AB We developed and characterized the first prototype of a silicon microstrip detector system to be used in the forward region (high rapidity) of high energy physics experiments. This detector features an innovative readout integrated circuit, the second version of the Fermilab Silicon Strip Readout chip (FSSR2), which, being completely data-driven, allows for the direct use of the detector information at the lowest level of the trigger. All the particle hits on the detector can be read out in real time without any external trigger and any particular limitation due to deadtime. The chip services 128 strips providing the address, the time-stamp and a 3 bit amplitude information for all hits. Several programmable features are included in the chip, such as an internal pulser, a baseline restorer, and a selectable signal peaking time and gain. The performance in terms of noise and threshold dispersion have been measured with and without sensor connected to the chip and at different values of peaking time and gain, confirming that the FSSR2 meets the design requirements. The electronic calibration has been crosschecked with a radioactive source of Am-241. (c) 2006 Elsevier B.V. All rights reserved.
C1 Ist Nazl Fis Nucl, I-20133 Milan, Italy.
   Univ Milan, Milan, Italy.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Univ Bergamo, Bergamo, Italy.
   Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
   Univ Pavia, I-27100 Pavia, Italy.
RP Manghisoni, M (reprint author), Ist Nazl Fis Nucl, Via Celoria 16, I-20133 Milan, Italy.
EM massimo.manghisoni@unibg.it; valerio.re@unibg.it; yarema@fnal.gov
RI Ratti, Lodovico/I-8836-2012; 
OI RATTI, LODOVICO/0000-0003-1906-1076; Re, Valerio/0000-0003-0697-3420;
   Manghisoni, Massimo/0000-0001-5559-0894
NR 9
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 388
EP 391
DI 10.1016/j.nima.2006.10.205
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400127
ER

PT J
AU Baranovski, A
   Benjamin, D
   Cooper, G
   Farrington, S
   Genser, K
   Hou, S
   Hsieh, T
   Kotwal, A
   Lipeles, E
   Murat, P
   Norman, M
   Robson, A
   Sfiligoi, I
   Snider, R
   Stelzer, B
   Syu, J
   Timm, S
   Vataga, E
   Wolbers, S
   Zhang, D
AF Baranovski, A.
   Benjamin, D.
   Cooper, G.
   Farrington, S.
   Genser, K.
   Hou, S.
   Hsieh, T.
   Kotwal, A.
   Lipeles, E.
   Murat, P.
   Norman, M.
   Robson, A.
   Sfiligoi, I.
   Snider, R.
   Stelzer, B.
   Syu, J.
   Timm, S.
   Vataga, E.
   Wolbers, S.
   Zhang, D.
TI CDF II Production Farm Project
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE data management; farms
AB We describe the architecture and discuss our operational experience in running the off-line reconstruction farm of the CDFII experiment. The Linux PC-based farm performs a wide set of tasks, ranging from producing calibrations and primary event reconstruction to large scale ntuple production. The farm control software uses a standard Condor toolkit [The Condor project page, http://www.es.wisc.edu/condor)] and the data handling part is based on SAM (Sequential Access via Metadata [Sequential data Access via Meta-data  http://d0db.fnal.gov/sam/]) software. During its lifetime, the CDF11 experiment will integrate a large amount of data (several petabytes) and the data processing chain is one of the key components of the successful physics program of the experiment. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ New Mexico, Albuquerque, NM 87131 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Duke Univ, Durham, NC 27708 USA.
   Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
   Univ Calif San Diego, La Jolla, CA 92093 USA.
   Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
   Ist Nazl Fis Nucl, I-00044 Frascati, Italy.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
RP Vataga, E (reprint author), Univ New Mexico, Albuquerque, NM 87131 USA.
EM vataga@fnal.gov
RI Robson, Aidan/G-1087-2011; 
OI Farrington, Sinead/0000-0001-5350-9271; Robson,
   Aidan/0000-0002-1659-8284
NR 3
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 399
EP 401
DI 10.1016/j.nima.2006.11.048
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400131
ER

PT J
AU Va'vra, J
   Benitez, J
   Leith, DWGS
   Mazaheri, G
   Ratcliff, B
   Schwiening, J
AF Va'vra, J.
   Benitez, J.
   Leith, D. W. G. S.
   Mazaheri, G.
   Ratcliff, B.
   Schwiening, J.
TI A 30 ps timing resolution for single photons with multi-pixel Burle
   MCP-PMT
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE photodetectors; Cherenkov detectors; RICH; TOF
ID FOCUSING DIRC; DETECTORS
AB We have achieved similar to 30 ps single-photoelectron and similar to 9.1 ps for multi-photoelectron timing resolution with a new 64-pixel Burle MCPPMT with 10 mu m microchannel holes. We have also demonstrated that this detector works in a magnetic field of 15 kG, and achieved a single-photoelectron timing resolution of better than 60ps The study is relevant for a new focusing DIRC RICH detector for particle identification at future colliders such as the super B-factory or ILC, and for future TOF techniques. This study shows that a highly pixilated MCP-PMT can deliver excellent timing resolution. Published by Elsevier B.V.
C1 Stanford Univ, SLAC, Stanford, CA 94309 USA.
RP Va'vra, J (reprint author), Stanford Univ, SLAC, Stanford, CA 94309 USA.
EM jjv@slac.stanford.edu
NR 7
TC 22
Z9 22
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 459
EP 462
DI 10.1016/j.nima.2006.10.291
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400151
ER

PT J
AU Levi, ME
AF Levi, Michael E.
TI The research and development program for the SNAP dark energy experiment
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE cosmology; supernovae; lensing; SNAP; telescopes; detectors
ID HIGH-RESISTIVITY SILICON; PROTON RADIATION-DAMAGE;
   CHARGE-COUPLED-DEVICES; P-CHANNEL CCDS; EFFICIENCY; TELESCOPE
AB The SNAP mission includes two surveys to study dark energy. In the deep survey, we detect more than 2000 matched Type la supernovae within a 7.5 deg(2) field, with redshifts covering the range z = 0.1 - 1.7. This uniform and high-quality set of "standard candles" will provide the most precise mapping of the expansion of the universe through the magnitude-redshift relation (Hubble diagram) ever constructed. The SNAP wide survey maps 1000 deg(2)/year in nine passbands to 28th magnitude. A weak-lensing study of the wide survey data traces the growth of structure and provides completely independent constraints on dark energy parameters. SNAP utilizes a 2 m class rigid light-weight telescope with a three-mirror anastigmatic design for a large, diffraction-limited field of view, The telescope feeds an instrumented similar to 0.7 deg 2 focal plane with similar to 600 million pixels sensitive to wavelengths from 400 to 1700 run. Full-depletion, high-purity silicon CCDs detect visible wavelengths, and 1700 nm cutoff HgCdTe detector arrays detect the near-IR. Passive cooling of the focal plane, fixed solar panels, fixed filters, and fixed antenna for telemetry simplify the mission. Room temperature operation of the telescope facilitates preflight testing. The satellite is placed in orbit about the second Earth-Sun Lagrange point (L2). (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Berkeley Lab, Berkeley, CA 94618 USA.
RP Levi, ME (reprint author), Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94618 USA.
EM melevi@lbl.gov
NR 23
TC 3
Z9 3
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 521
EP 525
DI 10.1016/j.nima.2006.10.380
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400174
ER

PT J
AU Roe, NA
   Bebek, CJ
   Dawson, KS
   Emes, JH
   Fabricius, MH
   Fairfield, JA
   Groom, DE
   Holland, SE
   Karcher, A
   Kolbe, WF
   Palaio, NP
   Wang, G
AF Roe, N. A.
   Bebek, C. J.
   Dawson, K. S.
   Emes, J. H.
   Fabricius, M. H.
   Fairfield, J. A.
   Groom, D. E.
   Holland, S. E.
   Karcher, A.
   Kolbe, W. F.
   Palaio, N. P.
   Wang, G.
TI Radiation-tolerant, red-sensitive CCDs for dark energy investigations
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 10th Pisa Meeting on Advanced Detectors
CY MAY 21-27, 2006
CL La Biodola, ITALY
DE charge-coupled devices; P-channel; fully depleted; diffusion; radiation
   tolerance
ID CHARGE-COUPLED-DEVICES; SILICON
AB We describe the development of thick (200-300 mu m), fully depleted p-channel, charge-coupled devices (CCDs). The advantages of these CCDs relative to conventional thin, n-channel CCDs include: high quantum efficiency over a wide range of wavelengths, extending into the near-infrared; negligible fringing at long (similar to 900-1000nm) wavelengths; improved radiation tolerance; and a small point-spread function controlled through the application of the bias voltage. These visible-to-near-infrared light detectors are good candidates for the next generation of large focal-plane mosaics under development for dark energy measurements. The Dark Energy Survey has selected these CCDs for the focal plane of a new camera being designed for the Blanco 4m telescope at CTIO in Chile. They also meet all the requirements for the visible-light detectors for the SuperNova/Acceleration Probe, a satellite-based experiment designed to make precision measurements of dark energy. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Roe, NA (reprint author), Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM naroe@lbl.gov
RI Roe, Natalie/A-8798-2012; Holland, Stephen/H-7890-2013; Fairfield,
   Jessamyn/P-9054-2016
OI Fairfield, Jessamyn/0000-0002-2143-9077
NR 16
TC 6
Z9 6
U1 2
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD MAR 1
PY 2007
VL 572
IS 1
BP 526
EP 527
DI 10.1016/j.nima.2006.10.381
PG 2
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 149EI
UT WOS:000245129400175
ER

PT J
AU Schwen, D
   Bringa, EM
AF Schwen, D.
   Bringa, E. M.
TI Atomistic simulations of swift ion tracks in diamond and graphite
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
   INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article; Proceedings Paper
CT 22nd International Conference on Atomic Collisions in Solids
CY JUL 21-26, 2006
CL Tech Univ Berlin, Berlin, GERMANY
HO Tech Univ Berlin
DE molecular dynamics; ion tracks; graphite; diamond
ID MOLECULAR-DYNAMICS SIMULATION; TETRAHEDRAL AMORPHOUS-CARBON; THERMAL
   SPIKES; FIELD-EMISSION; IRRADIATION; SURFACES; IMPACTS; METALS; DAMAGE
AB We have used molecular dynamics simulations to study ion tracks in diamond and graphite. Tracks are included using a thermal spike model, i.e. a certain number of atoms within an initial track radius are given an initial excitation energy. The total energy given to the excited atoms and the length of the track determine an "effective" stopping power dE/dx. Electronic excitations in semiconductors and semimetals like diamond and graphite can diffuse far from each other or be quenched before they couple to the lattice. This effect is included by varying the number of atoms that are effectively energized within the track. We use an initial track radius of 3 nm and we find that full amorphization of this region during the first few ps only occurs when the "effective" dE/dx is larger than 6 +/- 0.9 keV/nm for graphite and 10.5 +/- 1.5 keV/nm for diamond. Since the "effective" dE/dx depends on the electron-phonon coupling, our simulations set bounds on the efficiency of the coupling between the electronic excitations and the lattice in this highly non-equilibrium scenario. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Gottingen, Inst Phys, D-37077 Gottingen, Germany.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Schwen, D (reprint author), Univ Gottingen, Inst Phys, Tammannstr 1, D-37077 Gottingen, Germany.
EM dschwen@gwdg.de; ebringa@llnl.gov
RI Schwen, Daniel/E-9693-2010; Bringa, Eduardo/F-8918-2011
OI Schwen, Daniel/0000-0002-8958-4748; 
NR 55
TC 25
Z9 26
U1 0
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
EI 1872-9584
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD MAR
PY 2007
VL 256
IS 1
BP 187
EP 192
DI 10.1016/j.nimb.2006.12.001
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 160RF
UT WOS:000245959300039
ER

PT J
AU Titov, AI
   Azarov, AY
   Nikulina, LM
   Kucheyev, SO
AF Titov, A. I.
   Azarov, A. Yu.
   Nikulina, L. M.
   Kucheyev, S. O.
TI Damage buildup and the molecular effect in Si bombarded with PFn cluster
   ions
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
   INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article; Proceedings Paper
CT 22nd International Conference on Atomic Collisions in Solids
CY JUL 21-26, 2006
CL Tech Univ Berlin, Berlin, GERMANY
HO Tech Univ Berlin
DE ion implantation; cluster ions; molecular effect; defects; collision
   cascades; silicon; Si
ID SILICON; ACCUMULATION; N+
AB We study the molecular effect (ME) in damage accumulation in Si bombarded at room temperature with atomic P and F and cluster PFn (n = 2 and 4) ions with an energy of 2.1 keV/amu. Correct ion irradiation conditions for unambiguous studies of the ME are discussed. Rutherford backscattering/channeling spectrometry results show that the damage buildup behavior strongly depends on the cluster ion size, and the ME efficiency increases rapidly with increasing the number of atoms in cluster ions. Moreover, the ME efficiency decreases with increasing the defect generation rate, indicating that dynamic annealing processes, rather than nonlinear energy spikes, play a major role in the ME for these irradiation conditions. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Res & Prod Co Electron Optron, St Petersburg 194223, Russia.
   St Petersburg State Polytech Univ, Dept Phys Elect, St Petersburg 195251, Russia.
RP Kucheyev, SO (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
EM kucheyev@llnl.gov
RI Titov, Andrey/A-4608-2017
OI Titov, Andrey/0000-0003-4933-9534
NR 16
TC 12
Z9 12
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD MAR
PY 2007
VL 256
IS 1
BP 207
EP 210
DI 10.1016/j.nimb.2006.12.004
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 160RF
UT WOS:000245959300042
ER

PT J
AU Sideras-Haddad, E
   Schenkel, T
   Rebuli, DB
   Persaud, A
   Shrivastava, S
   Schneider, DH
   Mwakikunga, B
AF Sideras-Haddad, E.
   Schenkel, T.
   Rebuli, D. B.
   Persaud, A.
   Shrivastava, S.
   Schneider, D. H.
   Mwakikunga, B.
TI Electron emission and defect formation in the interaction of slow,
   highly charged ions with diamond surfaces
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
   INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article; Proceedings Paper
CT 22nd International Conference on Atomic Collisions in Solids
CY JUL 21-26, 2006
CL Tech Univ Berlin, Berlin, GERMANY
HO Tech Univ Berlin
ID IMPLANTATION; CENTERS; SILICON
AB We report on electron emission and defect formation in the interaction between slow (v approximate to 0.3 V-Bohr) highly charged ions (SHCI) with insulating (type IIa) and semiconducting (type IIb) diamonds. Electron emission induced by (31)p(q+) (q = 5-13) and Xe-136(q+) (q = 34-44) with kinetic energies of 9 kV x q increase linearly with the ion charge states, reaching over 100 electrons per ion for high xenon charge states without surface passivation of the diamond with hydrogen. Yields from both diamond types are up to a factor of two higher than from reference metal surfaces. Crater like defects with diameters of 25-40 nm are formed by the impact of single Xe44+ ions. High secondary electron yields and single ion induced defects enable the formation of single dopant arrays on diamond surfaces. (c) 2007 Published by Elsevier B.V.
C1 Univ Witwatersrand, Sch Phys, ZA-2050 Wits, South Africa.
   EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Sideras-Haddad, E (reprint author), Univ Witwatersrand, Sch Phys, ZA-2050 Wits, South Africa.
EM haddade@physics.wits.ac.za
NR 21
TC 3
Z9 3
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD MAR
PY 2007
VL 256
IS 1
BP 464
EP 467
DI 10.1016/j.nimb.2006.12.098
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 160RF
UT WOS:000245959300092
ER

PT J
AU Taguchi, T
   Igawa, N
   Wakai, E
   Jitsukawa, S
   Snead, LL
   Hasegawa, A
AF Taguchi, T.
   Igawa, N.
   Wakai, E.
   Jitsukawa, S.
   Snead, L. L.
   Hasegawa, A.
TI Effect of Al and Be ions pre-implantation on formation and growth of
   helium bubbles in SiC/SiC composites
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM
   INTERACTIONS WITH MATERIALS AND ATOMS
LA English
DT Article
DE SiC/SiC composite; ion irradiation; microstructural change; He bubbles;
   TEM; transmutation product
ID BERYLLIUM IMPLANTATION; SICF/SIC COMPOSITES; SWELLING BEHAVIOR; MATRIX
   COMPOSITES; IRRADIATION; FUSION; FIBER; MICROSTRUCTURE; FABRICATION;
   HYDROGEN
AB The effect of Al and Be ions pre-implantation on microstructural. change and, the formation and growth of He bubbles in SiC/SiC composite was investigated. Four kinds of ion implanted specimens were prepared with 100 appm Al, 1000 appm Al, 100 appm Be and 1000 appm Be implanted. No microstructural change was observed in the matrices and fibers of SiC/SiC composites implanted with Al or Be ions up to 1000 appm. The un-implanted and Al or Be pre-implanted SiC/SiC composites were simultaneously irradiated to 10 dpa using triple ion-beams (6.0-MeV Si2+, 1. 0-MeV He+ and 340-keV H+) at 1000 degrees C. Helium bubbles were formed in every matrix and fiber irradiated by triple ion-beams. The size of He bubbles in the matrix was increased by implanting Al or Be ions and increased with increasing amount of implanted Al or Be ions. The size of He bubbles in the fiber was slightly increased by implanting Al or Be ions. These results suggest that Al or Be as transmutation products and impurities may accelerate the growth of He bubbles in SiC/SiC composites under fusion reactor conditions. (c) 2007 Elsevier B.V. All rights reserved.
C1 Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Tohoku Univ, Sendai, Miyagi 9808579, Japan.
RP Taguchi, T (reprint author), Japan Atom Energy Agcy, Tokai, Ibaraki 3191195, Japan.
EM taguchi.tomitsugu@jaea.go.jp
RI Wakai, Eiichi/L-1099-2016
NR 20
TC 1
Z9 1
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-583X
J9 NUCL INSTRUM METH B
JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms
PD MAR
PY 2007
VL 256
IS 2
BP 669
EP 674
DI 10.1016/j.nimb.2007.01.078
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Atomic, Molecular & Chemical; Physics, Nuclear
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 158XC
UT WOS:000245827700011
ER

PT J
AU Olofsson, H
   Bengtsson, R
   Moller, P
AF Olofsson, H.
   Bengtsson, R.
   Moller, P.
TI Particle number projection in the macroscopic-microscopic approach
SO NUCLEAR PHYSICS A
LA English
DT Article
DE nuclear pairing; particle number projection
ID PAIRING CORRELATIONS; NUCLEAR-MASSES; MODEL; SUPERCONDUCTIVITY; HEAVY;
   STATE; GAPS
AB We perform nuclear ground-state pairing calculations with the monopole pairing interaction. The particle number fluctuations are taken into account by the particle number projection method, with variation after projection. The pairing-correction energies obtained in this approach are compared to the BCS-model results. We discuss extensively how to properly incorporate different pairing models in global macroscopic-microscopic nuclear mass calculations. A method to calculate the smoothly changing part of the particle number projected energy is developed based on the Strutinsky procedure, making it possible to extract a pairing-shell energy. The behavior of the different pairing models is investigated in detail in the nuclei Er-164 and Tm-165. Calculations are then performed along the beta-stability line and for several isotope and isotone chains from the proton drip-line to the neutron drip-line. The single-particle energy levels used are obtained from two different single-particle potentials: the folded-Yukawa and the modified-harmonic oscillator potentials. The pairing calculations in the two potentials differ slightly in the fine-structure but the overall results are very similar. When comparing the particle number projected model and the BCS model it is found that the pairing-shell energy is quite insensitive to which microscopic pairing model is used. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lund Univ, LTH, Div Mat Phys, S-22100 Lund, Sweden.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Olofsson, H (reprint author), Lund Univ, LTH, Div Mat Phys, POB 118, S-22100 Lund, Sweden.
EM henrik.olofsson@matfys.lth.se
OI Moller, Peter/0000-0002-5848-3565
NR 36
TC 10
Z9 10
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAR 1
PY 2007
VL 784
BP 104
EP 146
DI 10.1016/j.nuclphysa.2006.11.052
PG 43
WC Physics, Nuclear
SC Physics
GA 141SC
UT WOS:000244598000006
ER

PT J
AU Zeitlin, C
   Fukumura, A
   Guetersloh, SB
   Heilbronn, LH
   Iwata, Y
   Miller, J
   Murakami, T
AF Zeitlin, C.
   Fukumura, A.
   Guetersloh, S. B.
   Heilbronn, L. H.
   Iwata, Y.
   Miller, J.
   Murakami, T.
TI Fragmentation cross sections of Si-28 at beam energies from 290 A to
   1200 A MeV
SO NUCLEAR PHYSICS A
LA English
DT Article
DE heavy ions; fragmentation; galactic cosmic rays; shielding
ID TARGETS; MODEL; RADIATION; NUCLEI; FE-56
AB In planning for long-duration spaceflight, it will be important to accurately model the exposure of astronauts to heavy ions in the galactic cosmic rays (GCR). As part of an ongoing effort to improve heavy-ion transport codes that will be used in designing future spacecraft and habitats, fragmentation cross sections of Si-28 have been measured using beams with extracted energies from 290 A to 1200 A MeV, spanning most of the peak region of the energy distribution of silicon ions in the GCR. Results were obtained for six elemental targets: hydrogen, carbon, aluminum, copper, tin, and lead. The charge-changing cross sections are found to be energy-independent within the experimental uncertainties, except for those on the hydrogen target. Cross sections for the production of the heaviest fragments are found to decrease slightly with increasing energy for lighter targets, but increase with energy for tin and lead targets. The cross sections are compared to previous measurements at similar energies, and to predictions of the NUCFRG2 model used by NASA to evaluate radiation exposures in flight. For charge-changing cross sections, reasonable agreement is found between the present experiment and those of Webber et al. and Flesch et al., and NUCFRG2 agrees with the data to within 3% in most cases. Fragment cross sections show less agreement between experiments, and there are substantial differences between NUCFRG2 predictions and the data. (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Natl Inst Radiol Sci, Chiba, Japan.
RP Zeitlin, C (reprint author), 1 Cyclotron Rd,MS74R0197, Berkeley, CA 94720 USA.
EM cjzeitlin@lbl.gov
NR 15
TC 41
Z9 42
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAR 1
PY 2007
VL 784
BP 341
EP 367
DI 10.1016/j.nuclphysa.2006.10.088
PG 27
WC Physics, Nuclear
SC Physics
GA 141SC
UT WOS:000244598000013
ER

PT J
AU Drumm, CR
   Fan, WC
   Lorence, L
   Liscum-Powell, J
AF Drumm, Clifton R.
   Fan, Wesley C.
   Lorence, Leonard
   Liscum-Powell, Jennifer
TI An analysis of the extended-transport correction with application to
   electron beam transport
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Mathematics and Computation,
   Supercomputing, Reactor Physics and Nuclear and Biological Applications
CY SEP 12-15, 2005
CL Avignon, FRANCE
SP Amer Nucl Soc, French Local Sec, French Nucl Energy Soc, Commiss Energie Atom, French Natl Util, AREVA/FRAMATOME-ANP, European Nucl Soc, ANS, Math & Computat, ANS, Reactor Phys, ANS, Radiat Protect & Shielding, ANS, Mat Sci & Technol, European Commiss, Directorate Gen Res Div, Org Econ Cooperat & Dev/Nucl Energy Agcy, Int Atomic Energy Agcy, Korea Atomic Energy Res Inst, Japan Atomic Energy Res Inst, Korean Nucl Soc, Canadian Nucl Soc, H&S Adv Comp Technol Inc
ID FORWARD-PEAKED SCATTERING; FOKKER-PLANCK; BOLTZMANN-EQUATION;
   PARTICLE-TRANSPORT; CODES
AB Charged-particle transport is characterized by scattering cross sections that are extremely large and forward-peaked, requiring specialized treatment as compared with neutral-particle transport. The extended-transport correction (ETC) is known to be an effective method to treat elastic scattering of electrons. We apply the ETC to inelastic downscattering of electrons, and evaluate the effectiveness of the method by comparing the scattering moments for the screened Rutherford scattering kernel and for scattering with a deterministic cosine. The ETC approximation results in a delta-function in angle downscatter source term, for energy loss without direction change, which has been incorporated into the CEPTRE discrete ordinates code in a manner that is compatible with general quadrature sets, not requiring a specialized Galerkin quadrature. The ETC approximation also makes it possible to develop a first-collision source technique that is effective for charged-particle transport, by including particles that have downscattered in energy without direction change in the uncollided-flux solution. We demonstrate the effectiveness of these techniques for problems involving electron beam sources incident on infinite and finite water cylinders and compare the energy- and charge-deposition distributions with ITS Monte Carlo results with good agreement.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Drumm, CR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM crdrumm@sandia.gov
NR 20
TC 1
Z9 1
U1 0
U2 1
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD MAR
PY 2007
VL 155
IS 3
BP 355
EP 366
PG 12
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 141RG
UT WOS:000244595800003
ER

PT J
AU Weber, DP
   Sofu, T
   Yang, WS
   Downar, TJ
   Thomas, JW
   Zhong, Z
   Cho, JY
   Kim, KS
   Chun, TH
   Joo, HG
   Kim, CH
AF Weber, David P.
   Sofu, Tanju
   Yang, Won Sik
   Downar, Thomas J.
   Thomas, Justin W.
   Zhong, Zhaopeng
   Cho, Jin Young
   Kim, Kang Seog
   Chun, Tae Hyun
   Joo, Han Gyu
   Kim, Chang Hyo
TI High-fidelity light water reactor analysis with the numerical nuclear
   reactor
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Mathematics and Computation,
   Supercomputing, Reactor Physics and Nuclear and Biological Applications
CY SEP 12-15, 2005
CL Avignon, FRANCE
SP Amer Nucl Soc, French Local Sec, French Nucl Energy Soc, Commiss Energie Atom, French Natl Util, AREVA/FRAMATOME-ANP, European Nucl Soc, ANS, Math & Computat, ANS, Reactor Phys, ANS, Radiat Protect & Shielding, ANS, Mat Sci & Technol, European Commiss, Directorate Gen Res Div, Org Econ Cooperat & Dev/Nucl Energy Agcy, Int Atomic Energy Agcy, Korea Atomic Energy Res Inst, Japan Atomic Energy Res Inst, Korean Nucl Soc, Canadian Nucl Soc, H&S Adv Comp Technol Inc
ID TURBULENCE MODEL; REYNOLDS-NUMBER; ROD BUNDLE; FLOW
AB The Numerical Nuclear Reactor (NNR) was developed to provide a high-fidelity tool for light water reactor analysis based on first-principles models. High fidelity is accomplished by integrating full physics, highly refined solution modules for the coupled neutronic and thermal-hydraulic phenomena. Each solution module employs methods and models that are formulated faithfully to the first principles governing the physics, real geometry, and constituents. Specifically, the critical analysis elements that are incorporated in the coupled code capability are a direct whole-core neutron transport solution and an ultra-fine-mesh computational fluid dynamics / heat transfer solution, each obtained with explicit (sub-fuel-pin-cell level) heterogeneous representations of the components of the core. The considerable computational resources required for such highly refined modeling are addressed by using massively parallel computers, which together with the coupled codes constitute the NNR. To establish confidence in the NNR methodology, verification and validation of the solution modules have been performed and are continuing for both the neutronic module and the thermal-hydraulic module for single-phase and two-phase boiling conditions under prototypical pressurized water reactor and boiling water reactor conditions. This paper describes the features of the NNR and validation of each module and provides the results of several coupled code calculations.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
   Purdue Univ, W Lafayette, IN 47907 USA.
   Korea Atom Energy Res Inst, Taejon 305600, South Korea.
   Seoul Natl Univ, Seoul 151742, South Korea.
RP Joo, HG (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM joohan@snu.ac.kr
NR 39
TC 14
Z9 15
U1 3
U2 9
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD MAR
PY 2007
VL 155
IS 3
BP 395
EP 408
PG 14
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 141RG
UT WOS:000244595800007
ER

PT J
AU Hawari, AI
   Al-Qasir, II
   Ougouag, AM
AF Hawari, Ayman I.
   Al-Qasir, Iyad I.
   Ougouag, Abderrafi M.
TI Investigation of the impact of simple carbon interstitial formations on
   thermal neutron scattering in graphite
SO NUCLEAR SCIENCE AND ENGINEERING
LA English
DT Article; Proceedings Paper
CT International Topical Meeting on Mathematics and Computation,
   Supercomputing, Reactor Physics and Nuclear and Biological Applications
CY SEP 12-15, 2005
CL Avignon, FRANCE
SP Amer Nucl Soc, French Local Sec, French Nucl Energy Soc, Commiss Energie Atomic, French Natl Util, AREVA/FRAMATOME-ANP, European Nucl Soc, ANS, Math & Computat, ANS, Reactor Phys, ANS, Radiat Protect & Shielding, ANS, Mat Sci & Technol, European Commiss, Directorate Gen Res Div, Org Econ Cooperat & Dev/Nucl Energy Agcy, Int Atomic Energy Agcy, Korea Atomic Energy Res Inst, Japan Atomic Energy Res Inst, Korean Nucl Soc, Canadian Nucl Soc, H&S Adv Comp Technol Inc
AB In both the prismatic and pebble bed designs of very high temperature reactors, the graphite moderator is expected to reach exposure levels of 10(21) to 10(22) n/cm(2) over the lifetime of the reactor. This exposure results in damage to the graphite structure. Studies of the thermal properties of irradiated graphite show changes in the thermal conductivity and (to a lesser extent) the heat capacity at fluences <10(21) n/cm(2) In graphite, these properties depend on the behavior of atomic vibrations (phonons) in the solid. Therefore, it can be expected that alterations in the phonon behavior that would produce changes in these properties would have an impact on the thermal neutron scattering behavior of that material. In this work, an atomistic ab initio investigation is performed to explore the potential impact of simple carbon interstitial formations on the inelastic thermal neutron scattering behavior of graphite. Using the VASP/PHONON code system, graphite supercells were modeled with and without either a single carbon interstitial or a di-interstitial (C-2) molecule between the graphite planes. This resulted in the production of the phonon frequency spectra for these structures. From the phonon data, the inelastic thermal neutron scattering cross sections were generated, using the NJOY code system, at temperatures of 300 and 1200 K. A comparison of the generated cross sections shows that accounting for the interstitials in the calculations affects the cross sections mainly in the energy range from 0.01 to 0.1 eV.
C1 N Carolina State Univ, Dept Nucl Engn, Raleigh, NC 27695 USA.
   Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Hawari, AI (reprint author), N Carolina State Univ, Dept Nucl Engn, POB 7909, Raleigh, NC 27695 USA.
EM ayman.hawari@ncsu.edu
RI Ougouag, Abderrafi/A-9499-2009
OI Ougouag, Abderrafi/0000-0003-4436-380X
NR 24
TC 6
Z9 6
U1 0
U2 4
PU AMER NUCLEAR SOC
PI LA GRANGE PK
PA 555 N KENSINGTON AVE, LA GRANGE PK, IL 60526 USA
SN 0029-5639
EI 1943-748X
J9 NUCL SCI ENG
JI Nucl. Sci. Eng.
PD MAR
PY 2007
VL 155
IS 3
BP 449
EP 462
PG 14
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 141RG
UT WOS:000244595800011
ER

PT J
AU Dohrmann, CR
AF Dohrmann, C. R.
TI An approximate BDDC preconditioner
SO NUMERICAL LINEAR ALGEBRA WITH APPLICATIONS
LA English
DT Article
DE domain decomposition; multigrid; preconditioners; BDDC; FETI-DP
ID DOMAIN DECOMPOSITION METHOD; PRIMAL FETI METHODS; ENERGY MINIMIZATION;
   LINEAR ELASTICITY; INEXACT SOLVERS; CONVERGENCE; CONSTRAINTS; ALGORITHM
AB The balancing domain decomposition by constraints (BDDC) preconditioner requires direct solutions of two linear systems for each substructure and one linear system for a global coarse problem. The computations and memory needed for these solutions can be prohibitive if any one system is too large. We investigate an approach for addressing this issue based on approximating the direct solutions using preconditioners. In order to retain the attractive numerical properties of the exact version of BDDC, some of the preconditioners must possess a property related to the substructure null spaces. We describe a simple method to equip preconditioners with this property. Numerical results demonstrate the usefulness of the approach and confirm the theory. Published in 2006 by John Wiley & Sons, Ltd.
C1 Sandia Natl Labs, Struct Dynam Res Dept, Albuquerque, NM 87185 USA.
RP Dohrmann, CR (reprint author), Sandia Natl Labs, Struct Dynam Res Dept, Mail Stop 0847, Albuquerque, NM 87185 USA.
EM crdohrm@sandia.gov
NR 28
TC 19
Z9 19
U1 0
U2 2
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1070-5325
J9 NUMER LINEAR ALGEBR
JI Numer. Linear Algebr. Appl.
PD MAR
PY 2007
VL 14
IS 2
BP 149
EP 168
DI 10.1002/nla.514
PG 20
WC Mathematics, Applied; Mathematics
SC Mathematics
GA 140UV
UT WOS:000244533100005
ER

PT J
AU Wohlberg, B
   Vixie, KR
AF Wohlberg, Brendt
   Vixie, Kevin R.
TI Invariant template matching with tangent vectors
SO OPTICAL ENGINEERING
LA English
DT Article
DE template matching; correlation; invariance; linear approximation
ID PATTERN-RECOGNITION
AB Template matching is the search for a known object, represented by a template image, at an arbitrary location within a larger image. The local measure of match is often desired to be invariant to certain transforms, such as rotation and dilation, of the template. Although a variety of solutions have been proposed, most are designed to provide invariance to a specific transform or set of transforms, and often involve significant computational demands. When invariance to "small" transformations of the template (e.g., rotation by a small angle) is sufficient, local linear approximations to these transforms may be used to allow template matching with invariance to arbitrary transforms, without significantly increased computational requirements. (C) 2007 Society of Photo-Optical Instrumentation Engineers.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Wohlberg, B (reprint author), Los Alamos Natl Lab, T-7,MS-B284, Los Alamos, NM 87545 USA.
RI Wohlberg, Brendt/M-7764-2015
OI Wohlberg, Brendt/0000-0002-4767-1843
NR 11
TC 1
Z9 1
U1 0
U2 5
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 0091-3286
EI 1560-2303
J9 OPT ENG
JI Opt. Eng.
PD MAR
PY 2007
VL 46
IS 3
AR 037006
DI 10.1117/1.2715984
PG 10
WC Optics
SC Optics
GA 166BG
UT WOS:000246351400035
ER

PT J
AU Danilov, IG
   Parham, JF
AF Danilov, Igor G.
   Parham, James F.
TI The type series of 'Sinemys' wuerhoensis, a problematic turtle from the
   Lower Cretaceous of China, includes at least three taxa
SO PALAEONTOLOGY
LA English
DT Article
DE China; Cretaceous; Cryptodira; fossil; Testudines; Tugulu Group; turtle
ID JURASSIC QIGU FORMATION; JUNGGAR BASIN; EUCRYPTODIRAN TURTLE;
   TESTUDINES; REASSESSMENT; REPTILIA; XINJIANG
AB We re-examine the type series of 'Sinemys' wuerhoensis Yeh (at least 20 specimens, including several shells and skulls on three slabs of matrix and one isolated skull) from the Early Cretaceous Tugulu Group of China. Our study shows that the type series of 'S.' wuerhoensis is actually a chimera made up of at least three distinct taxa. The holotype of this taxon should be assigned to the basal eucryptodire genus Xinjiangchelys Yeh. As there are no characters that distinguish 'S.' wuerhoensis from Xinjiangchelys species, we consider it to be a nomen dubium. This new assignment of 'S.' wuerhoensis expands the temporal range of Xinjiangchelys from the Late Jurassic into the Early Cretaceous in Asia. The majority of the paratypes of 'S.' wuerhoensis (several shells in dorsal and ventral aspect and skulls) are referred to the basal eucryptodire genus Ordosemys Brinkman and Peng. We establish a new name for these specimens, Ordosemys brinkmania sp. nov. One additional specimen in the type series of 'S.' wuerhoensis, a skull, is referred to cf. Pantrionychia Joyce, Parham and Gauthier indet.
C1 Russian Acad Sci, Zool Inst, Dept Herpetol, St Petersburg 199034, Russia.
   Univ Calif, Museum Paleontol, Berkeley, CA 94720 USA.
   Joint Genome Inst, Evolutionary Genom Dept, Walnut Creek, CA 94598 USA.
   Calif Acad Sci, Dept Herpetol, San Francisco, CA 94103 USA.
RP Danilov, IG (reprint author), Russian Acad Sci, Zool Inst, Dept Herpetol, Univ Emb 1, St Petersburg 199034, Russia.
EM dig@mail333.com
NR 44
TC 12
Z9 13
U1 0
U2 0
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0031-0239
J9 PALAEONTOLOGY
JI Paleontology
PD MAR
PY 2007
VL 50
BP 431
EP 444
DI 10.1111/j.1475-4983.2006.00632.x
PN 2
PG 14
WC Paleontology
SC Paleontology
GA 144LI
UT WOS:000244797100006
ER

PT J
AU Lee, SJ
   Perera, L
   Coulter, SJ
   Mohrenweiser, HW
   Jetten, A
   Goldstein, JA
AF Lee, Su-Jun
   Perera, Lalith
   Coulter, Sherry J.
   Mohrenweiser, Harvey W.
   Jetten, Anton
   Goldstein, Joyce A.
TI The discovery of new coding alleles of human CYP26A1 that are
   potentially defective in the metabolism of all-trans retinoic acid and
   their assessment in a recombinant cDNA expression system
SO PHARMACOGENETICS AND GENOMICS
LA English
DT Article
DE CYP26A1; P450; polymorphisms; retinoic acid; retinoic acid metabolism
ID PROMYELOCYTIC LEUKEMIA-CELLS; MULTIPLE SEQUENCE ALIGNMENT; CAUDAL
   REGRESSION SYNDROME; HUMAN CYTOCHROME-P450; ESCHERICHIA-COLI; MOUSE
   EMBRYO; ENZYME; IDENTIFICATION; GENE; PHARMACOGENOMICS
AB Objectives Retinoic acid (RA) is a critical regulator of gene expression during embryonic development and in the maintenance of adult epithelial tissues. This study was undertaken to identify genetic polymorphisms of CYP26A1 which might affect these processes. We sequenced CYP26A1 in racially diverse individuals and assessed the metabolism of retinoic acid by newly identified coding alleles of CYP26A1 in a recombinant system.
   Methods CYP26A1 was sequenced in 24 Caucasians, 24 African-Americans, 24 Asians, and 20 individuals of unknown racial origin. cDNA constructs for wild-type and coding alleles of CYP26A1 were constructed in a pcDNA3.1 expression vector and expressed in Cos-1 cells. A FLAG tag at the C-terminal end of the cDNA was used to quantitate the recombinant CYP26A1 proteins.
   Results A total of 13 single nucleotide polymorphisms (SNPs) were identified in CYP26A1. Three SNPs produced coding changes: R173S, F186L, and C358R. These alleles were termed as CYP26A1*2, CYP26A1*3, and CYP26A1*4, respectively, by the Human Cytochrome P450 (CYP) Allele Nomenclature Committee at hftp://www.cypalleles.ki.se/. Wild type CYP26A1 protein metabolized all-trans-retinoic acid (at-RA) to 4-oxo-RA, 4-OH-RA as well as water-soluble metabolites. CYP26A1.3 (F186L and CYP26A1.4 (C358R) allelic proteins exhibited significantly lower metabolism (40-80%) of at-RA than wild-type CYP26A1.1 protein.
   Conclusion This is the first study to identify coding alleles of CYP26A1. Two coding alleles, CYP26A1*3 and CYP26A1*4, are predicted to be defective based on the metabolism of at-RA by the recombinant proteins. These studies suggest the need for future clinical studies of polymorphisms of CYP26A1 in embryonic development.
C1 NIEHS, Lab Pharmacol & Chem, NIH, Res Triangle Pk, NC 27709 USA.
   NIEHS, Struct Biol Lab, NIH, Res Triangle Pk, NC 27709 USA.
   NIEHS, Lab Resp Biol, NIH, Res Triangle Pk, NC 27709 USA.
   Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Goldstein, JA (reprint author), NIEHS, Lab Pharmacol & Chem, NIH, POB 12233, Res Triangle Pk, NC 27709 USA.
EM goldste1@niehs.nih.gov
RI Goldstein, Joyce/A-6681-2012; perera, Lalith/B-6879-2012; 
OI perera, Lalith/0000-0003-0823-1631; Coulter, Sherry/0000-0002-2732-3470;
   Jetten, Anton/0000-0003-0954-4445
FU Intramural NIH HHS [Z01 ES021024-26]; NIEHS NIH HHS [Y1-ES-8054-05]
NR 47
TC 13
Z9 14
U1 0
U2 2
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 1744-6872
J9 PHARMACOGENET GENOM
JI Pharmacogenet. Genomics
PD MAR
PY 2007
VL 17
IS 3
BP 169
EP 180
DI 10.1097/FPC.0b013e32801152d6
PG 12
WC Biotechnology & Applied Microbiology; Genetics & Heredity; Pharmacology
   & Pharmacy
SC Biotechnology & Applied Microbiology; Genetics & Heredity; Pharmacology
   & Pharmacy
GA 147EW
UT WOS:000244987200001
PM 17460545
ER

PT J
AU Barat, K
AF Barat, Ken
TI Laser safety - Eye surgery in the laser lab
SO PHOTONICS SPECTRA
LA English
DT Article
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ignit Facil Directorate, Berkeley, CA 94720 USA.
RP Barat, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ignit Facil Directorate, Berkeley, CA 94720 USA.
EM kbarat@lbl.gov
NR 0
TC 0
Z9 0
U1 0
U2 1
PU LAURIN PUBL CO INC
PI PITTSFIELD
PA BERKSHIRE COMMON PO BOX 1146, PITTSFIELD, MA 01202 USA
SN 0731-1230
J9 PHOTONIC SPECTRA
JI Photon. Spect.
PD MAR
PY 2007
VL 41
IS 3
BP 90
EP 91
PG 2
WC Optics
SC Optics
GA 150DH
UT WOS:000245195300025
ER

PT J
AU Dean, AP
   Martin, MC
   Sigee, DC
AF Dean, A. P.
   Martin, M. C.
   Sigee, D. C.
TI Resolution of codominant phytoplankton species in a eutrophic lake using
   synchrotron-based Fourier transform infrared spectroscopy
SO PHYCOLOGIA
LA English
DT Article
DE Ceratium; FTIR; Microcystis; phytoplankton
ID MICROSPECTROSCOPY; CELLS; BIOMASS; ALGAE; TOOL
AB Synchrotron-based Fourier-transform infrared (FTIR) microspectroscopy was used to distinguish micropopulations of the codominant algae Microcystis aeruginosa (Cyanophyceae) and Ceratium hirundinella (Dinophyceae) in mixed phytoplankton samples taken from the water column of a stratified eutrophic lake (Rostherne Mere, UK). FTIR spectra of the two algae showed a closely similar sequence of 10 bands over the wave-number range 4000-900 cm(-1). These were assigned to a range of vibrationally active chemical groups using published band assignments and on the basis of correlation and factor analysis. In both algae, intracellular concentrations of macromolecular components (determined as band intensity) varied considerably within the same population, indicating substantial intraspecific heterogeneity. Interspecific differences were separately analysed in relation to discrete bands and by multivariate analysis of the entire spectral region 1750-900 cm(-1). In terms of discrete bands, comparison of individual intensities (normalised to amide 1) demonstrated significant (99% probability level) differences in relation to six bands between the two algal species. Key interspecific differences were also noted in relation to the positions of bands 2, 10 (carbohydrate) and 7 (protein) and in the 3-D plots derived by principal component analysis (PCA) of the sequence of band intensities. PCA of entire spectral regions showed clear resolution of species in the PCA plot, with indication of separation on the basis of protein (region 1700-1500 cm(-1)) and carbohydrate (region 1150-900 cm(-1)) composition in the loading plot. Hierarchical cluster analysis (Ward algorithm) of entire spectral regions also showed clear discrimination of the two species within the resulting dendrogram.
C1 Univ Manchester, Sch Biol Sci, Manchester M13 9PT, Lancs, England.
   Lawrence Berkeley Natl Lab, Adv Light Source Div, Berkeley, CA 94720 USA.
RP Dean, AP (reprint author), Univ Manchester, Sch Biol Sci, 3-614 Stopford Bldg,Oxford Rd, Manchester M13 9PT, Lancs, England.
EM andrew.dean@manchester.ac.uk
OI Dean, Andrew/0000-0001-6893-5118
NR 28
TC 23
Z9 24
U1 1
U2 8
PU INT PHYCOLOGICAL SOC
PI LAWRENCE
PA NEW BUSINESS OFFICE, PO BOX 1897, LAWRENCE, KS 66044-8897 USA
SN 0031-8884
J9 PHYCOLOGIA
JI Phycologia
PD MAR
PY 2007
VL 46
IS 2
BP 151
EP 159
DI 10.2216/06-27.1
PG 9
WC Plant Sciences; Marine & Freshwater Biology
SC Plant Sciences; Marine & Freshwater Biology
GA 150NW
UT WOS:000245224500006
ER

PT J
AU Rudakov, DL
   Jacob, W
   Krieger, K
   Litnovsky, A
   Philipps, V
   West, WP
   Wong, CPC
   Allen, SL
   Bastasz, RJ
   Boedo, JA
   Brooks, NH
   Boivin, RL
   De Temmerman, G
   Fenstermacher, ME
   Groth, M
   Hollmann, EM
   Lasnier, CJ
   McLean, AG
   Moyer, RA
   Stangeby, PC
   Wampler, WR
   Watkins, JG
   Wienhold, P
   Whaley, J
AF Rudakov, D. L.
   Jacob, W.
   Krieger, K.
   Litnovsky, A.
   Philipps, V.
   West, W. P.
   Wong, C. P. C.
   Allen, S. L.
   Bastasz, R. J.
   Boedo, J. A.
   Brooks, N. H.
   Boivin, R. L.
   De Temmerman, G.
   Fenstermacher, M. E.
   Groth, M.
   Hollmann, E. M.
   Lasnier, C. J.
   McLean, A. G.
   Moyer, R. A.
   Stangeby, P. C.
   Wampler, W. R.
   Watkins, J. G.
   Wienhold, P.
   Whaley, J.
TI DiMES studies of temperature dependence of carbon erosion and
   re-deposition in the lower divertor of DIII-D under detachment
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 11th International Workshop on Plasma-Facing Materials and Components
   for Fusion Applications
CY OCT 10-12, 2006
CL Max Planck Inst Plasma Phys, Greifswald Branch, Greifswald, GERMANY
HO Max Planck Inst Plasma Phys, Greifswald Branch
ID HYDROCARBON FORMATION; D TOKAMAK; PLASMA; DESIGN; ION
AB A strong effect of a moderately elevated surface temperature on net carbon deposition and deuterium co-deposition in the DIII-D divertor was observed under detached conditions. A graphite DiMES sample with a 2 mm wide, 18 mm deep gap lined with silicon catcher plates was exposed to lower-single-null (LSN) L-mode plasmas first at room temperature, and then pre-heated to 200 degrees C by a built-in electrical heater. At the elevated temperature, deuterium co-deposition in the gap was reduced by an order of magnitude. At the plasma-facing surface of the pre-heated sample net carbon erosion was measured at a rate of 3 nm s(-1), whereas without pre-heating net deposition is normally observed under detachment. In a related experiment three sets of molybdenum mirrors recessed 2 cm below the divertor floor were exposed to identical LSN ELMy H-mode discharges. The first set of mirrors exposed at ambient temperature exhibited net carbon deposition at a rate of up to 3.7 nm s(-1) and suffered a significant drop in reflectivity. In contrast, two other mirror sets exposed at elevated temperatures between 90 and 175 degrees C exhibited practically no carbon deposition and their optical reflectivity in the wavelength range above 500 nm was essentially preserved.
C1 Univ Calif San Diego, La Jolla, CA 92093 USA.
   EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany.
   Forschungszentrum Julich, Inst Plasma Phys, Assoc EURATOM FZJ, D-52425 Julich, Germany.
   Gen Atom Co, San Diego, CA 92186 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Sandia Natl Labs, Livermore, CA 94551 USA.
   Univ Basel, Inst Phys, CH-4056 Basel, Switzerland.
   Univ Toronto, Inst Aerosp Studies, N York, ON M3H 5T6, Canada.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Rudakov, DL (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
EM rudakov@fusion.gat.com
RI Groth, Mathias/G-2227-2013; Krieger, Karl/F-9762-2014; 
OI Krieger, Karl/0000-0003-0427-8184; Jacob, Wolfgang/0000-0003-3504-142X
NR 19
TC 13
Z9 13
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
J9 PHYS SCRIPTA
JI Phys. Scr.
PD MAR
PY 2007
VL T128
BP 29
EP 34
DI 10.1088/0031-8949/2007/T128/006
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 172FT
UT WOS:000246790200007
ER

PT J
AU Meyer, FW
   Krstic, PS
   Vergara, LI
   Krause, HF
   Reinhold, CO
   Stuart, SJ
AF Meyer, F. W.
   Krstic, P. S.
   Vergara, L. I.
   Krause, H. F.
   Reinhold, C. O.
   Stuart, S. J.
TI Low energy chemical sputtering of ATJ graphite by atomic and molecular
   deuterium ions
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 11th International Workshop on Plasma-Facing Materials and Components
   for Fusion Applications
CY OCT 10-12, 2006
CL Max Planck Inst Plasma Phys, Greifswald Branch, Greifswald, GERMANY
HO Max Planck Inst Plasma Phys, Greifswald Branch
ID IMPACT; BOMBARDMENT; EROSION; YIELDS
AB We present experimental chemical sputtering results for D+, D-2(+) and D-3(+) ions incident on ATJ graphite in the energy range 5-60 eV D-1, and compare them with simulations for deuterated amorphous carbon impacted by neutral D, D-2 and D-3. The measured methane yields/D for the different species compared at the same energy/D diverge below about 60 eV D-1, the incident triatomic molecular ions leading to the largest yields/D, and the atomic ions to the smallest, reaching a factor of two difference at 10 eV/D. The measured yields/D are in reasonable agreement with molecular dynamics simulations over the entire calculated energy range. The model surfaces were prepared by D, D-2 and D-3 impacts in a way that mimics the experiment. For D-2 incident at energies below 15 eV/D, the simulations show a strong dependence of the sputtering yields on the vibrational state of the incident projectile.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   Clemson Univ, Dept Chem, Clemson, SC 29634 USA.
RP Meyer, FW (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
EM meyerfw@ornl.gov
RI Stuart, Steven/H-1111-2012; 
OI Reinhold, Carlos/0000-0003-0100-4962
NR 18
TC 15
Z9 15
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
J9 PHYS SCRIPTA
JI Phys. Scr.
PD MAR
PY 2007
VL T128
BP 50
EP 54
DI 10.1088/0031-8949/2007/T128/010
PG 5
WC Physics, Multidisciplinary
SC Physics
GA 172FT
UT WOS:000246790200011
ER

PT J
AU Compan, J
   Renk, TJ
   Hirai, T
   Linke, J
AF Compan, J.
   Renk, T. J.
   Hirai, T.
   Linke, J.
TI Reduction of preferential erosion of carbon fibre composites under
   intense transient heat pulses
SO PHYSICA SCRIPTA
LA English
DT Article; Proceedings Paper
CT 11th International Workshop on Plasma-Facing Materials and Components
   for Fusion Applications
CY OCT 10-12, 2006
CL Max Planck Inst Plasma Phys, Greifswald Branch, Greifswald, GERMANY
HO Max Planck Inst Plasma Phys, Greifswald Branch
ID FLUX; ITER; LOADS; BEAM; EMISSION
AB Two fusion-relevant carbon fibre composites (CFCs), NB31 (3D) and DMS704 (2D), have been thermally exposed in five different orientations to simulate transient events ( disruptions and ELMs). In these experiments with intense transient heat pulses in the electron beam JUDITH and the ion beam facility RHEPP-1, CFCs showed a preferential erosion of the fibre bundles aligned in the surface-plane. This phenomenon also occurred when these fibre bundles were the ones with the highest thermal conductivity. First results show that reduction of the number of fibres aligned parallel to the surface-plane strongly contributes to limiting the preferential erosion by fibre segment ejection ( brittle destruction) in CFCs. Strong mechanical attachment is essential to avoid fibre segment ejection during disruption. The selection of an optimum material orientation of the available CFCs is of relevant importance and will be further investigated.
C1 Forschungszentrum Julich, EURATOM Assoc, IEF 2, D-52425 Julich, Germany.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Compan, J (reprint author), Forschungszentrum Julich, EURATOM Assoc, IEF 2, D-52425 Julich, Germany.
EM j.compan@fz-juelich.de
NR 19
TC 12
Z9 12
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0031-8949
J9 PHYS SCRIPTA
JI Phys. Scr.
PD MAR
PY 2007
VL T128
BP 246
EP 249
DI 10.1088/0031-8949/2007/T128/048
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 172FT
UT WOS:000246790200049
ER

PT J
AU Schweizer, S
   Henke, B
   Rogulis, U
   Yen, WM
AF Schweizer, S.
   Henke, B.
   Rogulis, U.
   Yen, W. M.
TI Recombination processes in rare-earth doped MAl2O4 (M = Ca, Sr)
   persistent phosphors investigated by optically-detected magnetic
   resonance
SO PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT 10th Europhysical Conference on Defects in Insulating Materials
CY JUL 10-14, 2006
CL Milan, ITALY
ID LUMINESCENCE; EU2+; DY3+; IONS
AB Single crystalline MAl2O4 (M = Ca and Sr) persistent phosphors, which are nominally pure or additionally doped with Eu and Nd or Dy, respectively, were investigated for their recombination luminescence (RL) and microwave-induced changes in the RL at low temperatures. The analysis of the optically-detected electron paramagnetic resonance (EPR) spectra, recorded after ultraviolet excitation at 4.2 K, shows that intrinsic donor and acceptor centres are involved in the recombination process. Spectral dependent RL-EPR measurements on undoped CaAl2O4 (CAO) and SrAl2O4 (SAO) show that we deal with only one donor but at least two different acceptors. The g value of the donor is 1.99 in CAO and 1.97 in SAO; the g value of the acceptors is about 2.02. The donor-acceptor recombination energy is either emitted directly (undoped samples) or almost completely transferred to the rare-earth activators (doped samples). (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
C1 Univ Paderborn, Fac Sci, Dept Phys, D-33095 Paderborn, Germany.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Univ Latvia, Inst Solid State Phys, LV-1063 Riga, Latvia.
   Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA.
RP Schweizer, S (reprint author), Univ Paderborn, Fac Sci, Dept Phys, Warburger Str 100, D-33095 Paderborn, Germany.
EM schweizer@physik.upb.de
RI Schweizer, Stefan/H-3518-2011; Rogulis, Uldis/M-8596-2014
NR 13
TC 1
Z9 3
U1 2
U2 12
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0031-8965
J9 PHYS STATUS SOLIDI A
JI Phys. Status Solidi A-Appl. Mat.
PD MAR
PY 2007
VL 204
IS 3
BP 677
EP 682
DI 10.1002/pssa.200673745
PG 6
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter
SC Materials Science; Physics
GA 152PY
UT WOS:000245375300008
ER

PT J
AU Berridge, S
   Bugg, W
   Efremenko, Y
   Gearhart, R
   Ovchinnikov, S
   Awes, TC
   Cianciolo, V
   Davydov, YI
   Numao, T
   Poutissou, JM
AF Berridge, S.
   Bugg, W.
   Efremenko, Yu.
   Gearhart, R.
   Ovchinnikov, S.
   Awes, T. C.
   Cianciolo, V.
   Davydov, Yu. I.
   Numao, T.
   Poutissou, J-M.
TI pi(-) nuclear capture ratio on hydrogen and oxygen in water
SO PHYSICAL REVIEW A
LA English
DT Article
ID PION CAPTURE
AB We report on a measurement of the pi(-) nuclear capture ratio on hydrogen and oxygen in water by two methods. The capture ratio is measured to be WH2O=(4.45 +/- 0.24)x10(-3).
C1 Univ Tennessee, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   TRIUMF, Vancouver, BC V6T 2A3, Canada.
RP Berridge, S (reprint author), Univ Tennessee, Knoxville, TN 37996 USA.
RI Ovchinnikov, Serguei/C-4994-2014
NR 21
TC 0
Z9 0
U1 1
U2 3
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 034501
DI 10.1103/PhysRevA.75.034501
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300207
ER

PT J
AU Buth, C
   Santra, R
AF Buth, Christian
   Santra, Robin
TI Theory of x-ray absorption by laser-dressed atoms
SO PHYSICAL REVIEW A
LA English
DT Article
ID COMPLEX ABSORBING POTENTIALS; PHOTOABSORPTION CROSS-SECTIONS;
   FINITE-ELEMENT CALCULATIONS; TIME-DEPENDENT THEORY; MULTIPHOTON
   IONIZATION; SCHRODINGER-EQUATION; RESONANCE ENERGIES; POLYNOMIAL FORM;
   INTENSE; FIELD
AB An ab initio theory is devised for the x-ray photoabsorption cross section of atoms in the field of a moderately intense optical laser (800 nm, 10(13) W/cm(2)). The laser dresses the core-excited atomic states, which introduces a dependence of the cross section on the angle between the polarization vectors of the two linearly polarized radiation sources. We use the Hartree-Fock-Slater approximation to describe the atomic many-particle problem in conjunction with a nonrelativistic quantum-electrodynamic approach to treat the photon-electron interaction. The continuum wave functions of ejected electrons are treated with a complex absorbing potential that is derived from smooth exterior complex scaling. The solution to the two-color (x-ray plus laser) problem is discussed in terms of a direct diagonalization of the complex symmetric matrix representation of the Hamiltonian. Alternative treatments with time-independent and time-dependent non-Hermitian perturbation theories are presented that exploit the weak interaction strength between x rays and atoms. We apply the theory to study the photoabsorption cross section of krypton atoms near the K edge. A pronounced modification of the cross section is found in the presence of the optical laser.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
RP Santra, R (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM rsantra@anl.gov
RI Santra, Robin/E-8332-2014; Buth, Christian/A-2834-2017
OI Santra, Robin/0000-0002-1442-9815; Buth, Christian/0000-0002-5866-3443
NR 85
TC 32
Z9 32
U1 2
U2 8
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 033412
DI 10.1103/PhysRevA.75.033412
PG 12
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300146
ER

PT J
AU Cucchietti, FM
   Fernandez-Vidal, S
   Paz, JP
AF Cucchietti, Fernando Martin
   Fernandez-Vidal, Sonia
   Paz, Juan Pablo
TI Universal decoherence induced by an environmental quantum phase
   transition
SO PHYSICAL REVIEW A
LA English
DT Article
ID CHARACTERISTIC VECTORS; INFINITE DIMENSIONS; BORDERED MATRICES; SYSTEMS;
   MOTION; DECAY
AB Decoherence induced by coupling a system with an environment may display universal features. We demonstrate that when the coupling to the system drives a quantum phase transition in the environment, the decay of quantum coherences in the system is Gaussian with a width independent of the system-environment coupling strength. We obtain analytical results for a class of solvable models, and present numerical evidence supporting the validity of our results in more general cases. This effect opens the way for a quantum simulation algorithm, where a single qubit is used to detect a quantum phase transition. We discuss possible implementations of such an algorithm and relate our results to available data on universal decoherence in NMR echo experiments.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Univ Autonoma Barcelona, Dept Fis, Bellaterra, Spain.
   Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina.
RP Cucchietti, FM (reprint author), Los Alamos Natl Lab, Div Theoret, MS B213, Los Alamos, NM 87545 USA.
RI Paz, Juan/C-5947-2008; Cucchietti, Fernando/C-7765-2016
OI Cucchietti, Fernando/0000-0002-9027-1263
NR 20
TC 60
Z9 62
U1 0
U2 3
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 032337
DI 10.1103/PhysRevA.75.032337
PG 5
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300069
ER

PT J
AU de Jonge, MD
   Tran, CQ
   Chantler, CT
   Barnea, Z
   Dhal, BB
   Paterson, D
   Kanter, EP
   Southworth, SH
   Young, L
   Beno, MA
   Linton, JA
   Jennings, G
AF de Jonge, Martin D.
   Tran, Chanh Q.
   Chantler, Christopher T.
   Barnea, Zwi
   Dhal, Bipin B.
   Paterson, David
   Kanter, Elliot P.
   Southworth, Stephen H.
   Young, Linda
   Beno, Mark A.
   Linton, Jennifer A.
   Jennings, Guy
TI Measurement of the x-ray mass attenuation coefficient and determination
   of the imaginary component of the atomic form factor of tin over the
   energy range of 29-60 keV
SO PHYSICAL REVIEW A
LA English
DT Article
ID ABSORPTION FINE-STRUCTURE; MATCHED ION CHAMBERS; NEAR-EDGE ABSORPTION;
   MONITORING FLUCTUATIONS; INTERNATIONAL-UNION; PRECISION; BEAMLINE;
   TABULATION; RESOLUTION; PROJECT
AB We use the x-ray extended-range technique (XERT) [C. T. Chantler , Phys. Rev. A 64, 062506 (2001)] to measure the mass attenuation coefficients of tin in the x-ray energy range of 29-60 keV to 0.04-3 % accuracy, and typically in the range 0.1-0.2 %. Measurements made over an extended range of the measurement parameter space are critically examined to identify, quantify, and correct a number of potential experimental systematic errors. These results represent the most extensive experimental data set for tin and include absolute mass attenuation coefficients in the regions of x-ray absorption fine structure, extended x-ray absorption fine structure, and x-ray absorption near-edge structure. The imaginary component of the atomic form factor f(2) is derived from the photoelectric absorption after subtracting calculated Rayleigh and Compton scattering cross sections from the total attenuation. Comparison of the result with tabulations of calculated photoelectric absorption coefficients indicates that differences of 1-2 % persist between calculated and observed values.
C1 Argonne Natl Lab, Xray Operat & Res, Argonne, IL 60439 USA.
   Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.
   Australian Synchroton Project, Melbourne, Vic 3168, Australia.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
   Argonne Natl Lab, BESSRC, CAT, Argonne, IL 60439 USA.
RP de Jonge, MD (reprint author), Argonne Natl Lab, Xray Operat & Res, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI de Jonge, Martin/C-3400-2011; Chantler, Christopher/D-4744-2013; Tran,
   Chanh/M-7868-2015
OI Chantler, Christopher/0000-0001-6608-0048; 
NR 34
TC 26
Z9 26
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9926
EI 2469-9934
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 032702
DI 10.1103/PhysRevA.75.032702
PG 14
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300108
ER

PT J
AU Fahy, K
   Sokell, E
   O'Sullivan, G
   Aguilar, A
   Pomeroy, JM
   Tan, JN
   Gillaspy, JD
AF Fahy, K.
   Sokell, E.
   O'Sullivan, G.
   Aguilar, A.
   Pomeroy, J. M.
   Tan, J. N.
   Gillaspy, J. D.
TI Extreme-ultraviolet spectroscopy of highly charged xenon ions created
   using an electron-beam ion trap
SO PHYSICAL REVIEW A
LA English
DT Article
ID LASER-PRODUCED PLASMAS; GROUND-STATE CONFIGURATIONS; 4D-4F EMISSION
   RESONANCES; I ISOELECTRONIC SEQUENCE; ENERGY-LEVEL SCHEME; IONIZED
   XENON; TRANSITION-PROBABILITIES; IMPACT IONIZATION; XE-XXVI; SPECTRA
AB Extreme-ultraviolet spectra of xenon ions have been recorded in the 4.5 to 20 nm wavelength region using an electron beam ion trap and a flat field spectrometer. The electron beam energy was varied from 180 eV to 8 keV and radiation from charge states Xe6+ to Xe43+ was observed. Our measured wavelengths were compared to atomic structure calculations using the Cowan suite of codes. We have measured seventeen previously unreported features corresponding to transitions in Xe35+ through to Xe41+ with estimated wavelength uncertainties of +/- 0.003 nm. It was found that for the case of continuous injection of neutral xenon gas a wide range of charge states were always present in the trap but this charge state distribution was greatly narrowed, towards higher charge states, if a sufficiently low gas injection pressure was employed. The energy dependence of spectral lines arising from Xe42+ and Xe43+ revealed enhancement of the total ionization cross sections, due to excitation-autoionization of n=2 electrons to n=3 levels, in the Xe41+ and Xe42+ charge states.
C1 Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
   Univ Coll Dublin, Sch Phys, Dublin 4, Ireland.
RP Fahy, K (reprint author), Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
OI Sokell, Emma/0000-0002-7063-7205
NR 38
TC 25
Z9 25
U1 1
U2 6
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 032520
DI 10.1103/PhysRevA.75.032520
PG 12
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300103
ER

PT J
AU Harris, AL
   Madison, DH
   Peacher, JL
   Foster, M
   Bartschat, K
   Saha, HP
AF Harris, A. L.
   Madison, D. H.
   Peacher, J. L.
   Foster, M.
   Bartschat, K.
   Saha, H. P.
TI Effects of the final-state electron-ion interactions on the fully
   differential cross sections for heavy-particle-impact ionization of
   helium
SO PHYSICAL REVIEW A
LA English
DT Article
ID SINGLE IONIZATION; EXCHANGE
AB Three-dimensional fully differential cross sections for heavy-particle-impact ionization of helium are examined. Previously, the three-body distorted-wave (3DW) model has achieved good agreement with experiment in the scattering plane for small momentum transfers, but poor agreement for large momentum transfers. Poor agreement was also observed outside the scattering plane for all momentum transfers. In particular, the 3DW calculations predicted cross sections that were too small both perpendicular to the scattering plane and for large momentum transfers. The important unanswered question concerns the physical effects that cause the significant disagreement between experiment and theory. In previous works, the role of the projectile-ion interaction has been examined. Although the importance of exchange between the ejected electron and the residual bound electrons has been well established, and frequently studied, for electron-impact ionization, the importance of this effect has not been examined for heavy-particle scattering. In this paper we examine the role of this effect for heavy-particle scattering.
C1 Univ Missouri, Rolla, MO 65409 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Drake Univ, Des Moines, IA 50311 USA.
   Univ Cent Florida, Orlando, FL 32816 USA.
RP Harris, AL (reprint author), Univ Missouri, Rolla, MO 65409 USA.
RI Bartschat, Klaus/I-2527-2012
NR 18
TC 18
Z9 20
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 032718
DI 10.1103/PhysRevA.75.032718
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300124
ER

PT J
AU Rolles, D
   Zhang, H
   Pesic, ZD
   Bilodeau, RC
   Wills, A
   Kukk, E
   Rude, BS
   Ackerman, GD
   Bozek, JD
   Muino, RD
   de Abajo, FJG
   Berrah, N
AF Rolles, D.
   Zhang, H.
   Pesic, Z. D.
   Bilodeau, R. C.
   Wills, A.
   Kukk, E.
   Rude, B. S.
   Ackerman, G. D.
   Bozek, J. D.
   Diez Muino, R.
   Garcia de Abajo, F. J.
   Berrah, N.
TI Size effects in angle-resolved photoelectron spectroscopy of free
   rare-gas clusters
SO PHYSICAL REVIEW A
LA English
DT Article
ID CORE-LEVEL PHOTOELECTRON; ARGON CLUSTERS; ANGULAR-DISTRIBUTIONS;
   NONCRYSTALLINE STRUCTURE; MOLECULAR CLUSTERS; HIGH-RESOLUTION; ENERGY
   SHIFTS; BULK MATTER; XE CLUSTERS; AR CLUSTERS
AB The photoionization of free Xe clusters is investigated by angle-resolved time-of-flight photoelectron spectroscopy. The measurements probe the evolution of the photoelectron angular distribution parameter as a function of photon energy and cluster size. While the overall photon-energy-dependent behavior of the photoelectrons from the clusters is very similar to that of the free atoms, distinct differences in the angular distribution point at cluster-size-dependent effects. Multiple scattering calculations trace their origin to elastic photoelectron scattering.
C1 Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   Univ Turku, Dept Phys, Turku 20014, Finland.
   Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   Univ Basque Country, CSIC, Ctr Mixto, Ctr Fis Mat, San Sebastian 20018, Spain.
   DIPC, San Sebastian 20018, Spain.
   CSIC, Inst Opt, E-28006 Madrid, Spain.
RP Rolles, D (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA.
RI Rolles, Daniel/C-2384-2008; Bozek, John/E-4689-2010; Diez Muino,
   Ricardo/C-9203-2009; Garcia de Abajo, Javier/A-6095-2009; CSIC-UPV/EHU,
   CFM/F-4867-2012; Bozek, John/E-9260-2010; DONOSTIA INTERNATIONAL PHYSICS
   CTR., DIPC/C-3171-2014; 
OI Diez Muino, Ricardo/0000-0001-8593-0327; Garcia de Abajo,
   Javier/0000-0002-4970-4565; Bozek, John/0000-0001-7486-7238; Bilodeau,
   Rene/0000-0001-8607-2328
NR 47
TC 19
Z9 19
U1 1
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 031201
DI 10.1103/PhysRevA.75.031201
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300004
ER

PT J
AU Seliger, M
   Reinhold, CO
   Minami, T
   Schultz, DR
   Pindzola, MS
   Yoshida, S
   Burgdorfer, J
   Lamour, E
   Rozet, JP
   Vernhet, D
AF Seliger, Marek
   Reinhold, Carlos O.
   Minami, Tatsuya
   Schultz, David R.
   Pindzola, Michael S.
   Yoshida, Shuhei
   Burgdoerfer, Joachim
   Lamour, Emily
   Rozet, Jean-Pierre
   Vernhet, Dominique
TI Electron capture and electron transport by fast ions penetrating solids:
   An open quantum system approach with sources and sinks
SO PHYSICAL REVIEW A
LA English
DT Article
ID PROTON-HYDROGEN COLLISIONS; CHARGE-TRANSFER; ATOMIC-HYDROGEN;
   CROSS-SECTIONS; HIGH-ENERGY; IONIZATION; SCATTERING; APPROXIMATION;
   POPULATION; SIMULATION
AB We present a joint theoretical and experimental study of the time evolution of electronic states of highly charged hydrogenic ions formed by capture during transmission through solids as they undergo multiple collisions and radiative decay. For this transport problem we have developed an inhomogeneous nonunitary Lindblad master equation that allows for a description of open quantum systems with both sinks (electron loss) and source (capture) present. We apply this theoretical framework to study transient coherences created in electron capture by 13.6 MeV/amu Ar18+ ions transmitted through amorphous carbon foils and decoherence during subsequent interaction with the foil. In the limit of thin targets we can directly probe electron capture cross sections under single collision conditions, while for thicker targets we follow the partially coherent dynamics of the open quantum system in interaction with the solid as a function of interaction time. The calculated results are in close agreement with experimental data obtained at the LISE facility in GANIL. Photon intensities from excited argon ions were determined through high resolution x-ray spectroscopy in which individual fine structure components were resolved. Measurements were performed for a wide range of carbon foil thickness to study the time development of the excited state populations.
C1 Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria.
   Karl Franzens Univ Graz, Inst Phys, A-8010 Graz, Austria.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   Auburn Univ, Dept Phys, Auburn, AL 36849 USA.
   Univ Paris 06, CNRS, Inst Nanosci Paris, UMR 7588, F-75015 Paris, France.
   Univ Paris 07, CNRS, Inst Nanosci Paris, UMR 7588, F-75015 Paris, France.
RP Seliger, M (reprint author), Vienna Univ Technol, Inst Theoret Phys, Wiedner Hauptstr 8-10, A-1040 Vienna, Austria.
EM marek.seliger@uni-graz.at
OI Reinhold, Carlos/0000-0003-0100-4962
NR 45
TC 14
Z9 14
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 032714
DI 10.1103/PhysRevA.75.032714
PG 15
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300120
ER

PT J
AU Tonyushkin, A
AF Tonyushkin, Alexei
TI Comment on "Periodic structures generated in a cloud of cold atoms"
SO PHYSICAL REVIEW A
LA English
DT Letter
AB We consider calculations for maximum visibility of the atomic fringe pattern generated by optical phase gratings presented by Strekalov It is shown that the phase grating technique offers higher maximum visibilities for the atomic fringe patterns than those calculated by the authors.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Tonyushkin, A (reprint author), Los Alamos Natl Lab, C PCS,MS J567, Los Alamos, NM 87545 USA.
EM alexeyt@lanl.gov
RI Tonyushkin, Alexey/A-4150-2008
OI Tonyushkin, Alexey/0000-0002-0531-715X
NR 5
TC 1
Z9 1
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 037602
DI 10.1103/PhysRevA.75.037602
PG 2
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300213
ER

PT J
AU Wang, T
   Yelin, SF
   Cote, R
   Eyler, EE
   Farooqi, SM
   Gould, PL
   Kostrun, M
   Tong, D
   Vrinceanu, D
AF Wang, T.
   Yelin, S. F.
   Cote, R.
   Eyler, E. E.
   Farooqi, S. M.
   Gould, P. L.
   Kostrun, M.
   Tong, D.
   Vrinceanu, D.
TI Superradiance in ultracold Rydberg gases
SO PHYSICAL REVIEW A
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATION; SUPER-RADIANCE; ATOMS; OSCILLATIONS
AB Experiments in dense, ultracold gases of rubidium Rydberg atoms show a considerable decrease of the radiative excited state lifetimes compared to dilute gases. This accelerated decay is explained by collective and cooperative effects, leading to superradiance. A formalism to calculate effective decay times in a dense Rydberg gas shows that for these atoms the decay into nearby levels increases by up to three orders of magnitude. Excellent agreement between theory and experiment follows from this treatment of Rydberg decay behavior.
C1 Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
   Harvard Smithsonian Ctr Astrophys, ITAMP, Cambridge, MA 02138 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Wang, T (reprint author), Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
NR 28
TC 46
Z9 46
U1 2
U2 11
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1050-2947
J9 PHYS REV A
JI Phys. Rev. A
PD MAR
PY 2007
VL 75
IS 3
AR 033802
DI 10.1103/PhysRevA.75.033802
PG 4
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA 151YE
UT WOS:000245326300179
ER

PT J
AU Balagurusamy, VSK
   Streitel, R
   Shpyrko, OG
   Pershan, PS
   Meron, M
   Lin, BH
AF Balagurusamy, Venkatachalapathy S. K.
   Streitel, Reinhard
   Shpyrko, Oleg G.
   Pershan, P. S.
   Meron, Mati
   Lin, Binhua
TI X-ray reflectivity studies of atomic-level surface-segregation in a
   liquid eutectic alloy of AuSn
SO PHYSICAL REVIEW B
LA English
DT Article
ID GA-BI ALLOYS; SOLDERS; BINARY
AB X-ray reflectivity studies reveal atomic-level surface-segregation at the free surface of the eutectic Au71Sn29 liquid alloy. The surface-segregation extends up to three layers, in which the top layer is almost a pure monolayer of Sn, the second layer is almost a pure monolayer of Au and the third layer appears to be slightly enhanced in Au. Although the surface-segregation concentration profiles can be qualitatively accounted for by the theories of Defay-Prigogine and Strohl-King, they cannot satisfactorily account for the measured surface tension.
C1 Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   Harvard Univ, DEAS, Cambridge, MA 02138 USA.
   Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
   Univ Chicago, CARS, Chicago, IL 60637 USA.
RP Balagurusamy, VSK (reprint author), Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
RI Shpyrko, Oleg/J-3970-2012; 
OI Balagurusamy, Venkat/0000-0002-1994-2634
NR 28
TC 13
Z9 13
U1 0
U2 4
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104209
DI 10.1103/PhysRevB.75.104209
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100038
ER

PT J
AU Balatsky, AV
   Graf, MJ
   Nussinov, Z
   Trugman, SA
AF Balatsky, A. V.
   Graf, M. J.
   Nussinov, Z.
   Trugman, S. A.
TI Entropy of solid He-4: The possible role of a dislocation-induced glass
SO PHYSICAL REVIEW B
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATION; NEUTRON-SCATTERING; THERMAL PROPERTIES;
   GRANULAR MEDIA; HEAT CAPACITY; CRYSTALS; HELIUM; THERMODYNAMICS;
   TRANSITION; SUPERFLUID
AB Solid He-4 is viewed as a nearly perfect Debye solid. Yet recent calorimetry indicates that its low-temperature specific heat has both cubic and linear contributions. These features appear in the same temperature range (T similar to 200 mK) where measurements of the torsional oscillator period suggest a supersolid transition. We analyze the specific heat to compare the measured with the estimated entropy for a proposed supersolid transition with 1% superfluid fraction. We find that the experimental entropy is substantially less than the calculated entropy. We suggest that the low-temperature linear term in the specific heat is due to a glassy state that develops at low temperatures and is caused by a distribution of tunneling systems in the crystal. It is proposed that small scale dislocation loops produce those tunneling systems. We argue that the reported mass decoupling is consistent with an increase in the oscillator frequency, as expected for a glasslike transition.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Washington Univ, Dept Phys, St Louis, MO 63160 USA.
RP Balatsky, AV (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
EM avb@lanl.gov
NR 39
TC 47
Z9 48
U1 1
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094201
DI 10.1103/PhysRevB.75.094201
PG 5
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500031
ER

PT J
AU Baskes, MI
   Srinivasan, SG
   Valone, SM
   Hoagland, RG
AF Baskes, M. I.
   Srinivasan, S. G.
   Valone, S. M.
   Hoagland, R. G.
TI Multistate modified embedded atom method
SO PHYSICAL REVIEW B
LA English
DT Article
ID FCC METALS; POTENTIALS; ENERGIES; IMPURITIES; DEFECTS; SILICON; AU
AB A multireference state formalism for determining the functions for the modified embedded atom method (MEAM) is developed. This formalism eliminates almost all of the prior arbitrary choices in the MEAM function determination and replaces it with first-principles calculations of the MEAM electron densities, embedding energy, pair potential, and angular screening functions. The formalism accepts any level of first-principles information and is applicable to all elements. It may be considered as a physically based interpolation of the first-principles data for systems that fall within the range covered by that data. The critical addition of multiple reference states includes the energy/volume relationship for those reference structures as well as reference paths connecting the reference structures. The formalism is applied to Cu as a model material. Extensive predictions of the model are made and compared to additional first-principles calculations, results of two literature EAM potentials, and experiment. Our model, which uses as input only the first-principles database, represents the first-principles calculations extremely well (better than the EAM calculations). Furthermore, it agrees with experiments almost as well as EAM models, derived from a combination of first-principles calculations and experiments.
C1 Los Alamos Natl Lab, Div Mat Sci, Los Alamos, NM 87545 USA.
RP Baskes, MI (reprint author), Los Alamos Natl Lab, Div Mat Sci, Los Alamos, NM 87545 USA.
EM baskes@lanl.gov
RI Hoagland, Richard/G-9821-2012
NR 30
TC 29
Z9 30
U1 1
U2 15
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094113
DI 10.1103/PhysRevB.75.094113
PG 16
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500030
ER

PT J
AU Boettger, JC
   Trickey, SB
AF Boettger, J. C.
   Trickey, S. B.
TI First-principles calculation of the spin-orbit splitting in graphene
SO PHYSICAL REVIEW B
LA English
DT Article
ID DFT CALCULATIONS; GRAPHITE; SYSTEMS
AB Recent success in making macroscopic graphene samples has stimulated interest in possible unusual electron physics near the Brillouin zone (BZ) vertex K, notably the prediction of a spin quantum Hall effect. Observability depends critically on the size of the spin-orbit gap Delta(SO) at K. Prior approximate calculations give results from 1.2 K (approximate to 0.1 meV) down to 10 mK (approximate to 0.00086 meV). We report fully first-principles all-electron calculations of this splitting using large Gaussian basis sets and the Douglas-Kroll-Hess methodology in the density functional theory fitting function code (GTOFF). Our result Delta(SO)approximate to 0.6 K or 0.05 meV is robust against the choice of the approximate exchange-correlation functional and against variations of the lattice constant, density of the BZ scan, basis set enrichment, and key numerical convergence parameters.
C1 Los Alamos Natl Lab, Grp X1, Los Alamos, NM 87545 USA.
   Univ Florida, Dept Chem & Phys, Quantum Theory Project, Gainesville, FL 32611 USA.
RP Boettger, JC (reprint author), Los Alamos Natl Lab, Grp X1, Los Alamos, NM 87545 USA.
NR 16
TC 95
Z9 95
U1 2
U2 32
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 12
AR 121402
DI 10.1103/PhysRevB.75.121402
PG 3
WC Physics, Condensed Matter
SC Physics
GA 151ZQ
UT WOS:000245330200012
ER

PT J
AU Bud'ko, SL
   Canfield, PC
   Avila, MA
   Takabatake, T
AF Bud'ko, Sergey L.
   Canfield, Paul C.
   Avila, Marcos A.
   Takabatake, Toshiro
TI Magnetic-field tuning of the low-temperature state of YbNiSi3
SO PHYSICAL REVIEW B
LA English
DT Article
ID QUANTUM CRITICALITY; HEAVY
AB We present detailed data from low-temperature magnetization, magnetoresistance, and specific heat measurements on single-crystal YbNiSi3 with the magnetic field applied along the easy magnetic axis, H parallel to b. An initially antiferromagnetic ground state changes into a field-stabilized metamagnetic phase at similar to 16 kOe (T -> 0). On further increase of the magnetic field, magnetic order is suppressed at similar to 85 kOe. No non-Fermi-liquid-like power law was observed in the resistivity in the vicinity of the critical field for T >= 0.4 K. Heat capacity measurements suggest that the applied magnetic field splits the nearly degenerate crystal-electric-field levels that form the zero-field ground state of YbNiSi3. The functional behaviors of the resistivity and specific heat are discussed in comparison with those of the few other stoichiometric heavy fermion compounds with established field-induced quantum critical points.
C1 Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
   Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
   Hiroshima Univ, Dept Quantum Matter, ADSM, Higashihiroshima, Hiroshima 7398530, Japan.
RP Bud'ko, SL (reprint author), Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA.
RI Avila, Marcos/B-3578-2008; Canfield, Paul/H-2698-2014; Takabatake,
   Toshiro/L-2882-2014
OI Avila, Marcos/0000-0002-3796-3244; Takabatake,
   Toshiro/0000-0002-3293-8592
NR 18
TC 10
Z9 11
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094433
DI 10.1103/PhysRevB.75.094433
PG 5
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500071
ER

PT J
AU Buth, C
AF Buth, Christian
TI A priori Wannier functions from modified Hartree-Fock and Kohn-Sham
   equations
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRONIC-STRUCTURE CALCULATIONS; COMPOSITE ENERGY-BANDS; COHESIVE
   PROPERTIES; MOLECULAR ORBITALS; LINEAR COMBINATION; LITHIUM HYDRIDE;
   INITIO; SOLIDS; POLYMERS; INSULATORS
AB The Hartree-Fock equations are modified to directly yield Wannier functions following a proposal of Shukla [Chem. Phys. Lett. 262, 213 (1996)]. This approach circumvents the a posteriori application of the Wannier transformation to Bloch functions. I give a rigorous derivation of the relevant equations by introducing an orthogonalizing potential to ensure the orthogonality among the resulting functions. The properties of these, so-called a priori Wannier functions, are analyzed and the relation of the modified Hartree-Fock equations to the conventional, Bloch-function-based equations is elucidated. It is pointed out that the modified equations offer a different route to maximally localized Wannier functions. Their computational solution is found to involve an effort that is comparable to the effort for the solution of the conventional equations. Above all, I show how a priori Wannier functions can be obtained by a modification of the Kohn-Sham equations of density-functional theory.
C1 Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany.
RP Buth, C (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM christian.buth@web.de
RI Buth, Christian/A-2834-2017
OI Buth, Christian/0000-0002-5866-3443
NR 43
TC 1
Z9 1
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 12
AR 125121
DI 10.1103/PhysRevB.75.125121
PG 6
WC Physics, Condensed Matter
SC Physics
GA 151ZQ
UT WOS:000245330200037
ER

PT J
AU Califano, M
   Franceschetti, A
   Zunger, A
AF Califano, Marco
   Franceschetti, Alberto
   Zunger, Alex
TI Lifetime and polarization of the radiative decay of excitons,
   biexcitons, and trions in CdSe nanocrystal quantum dots
SO PHYSICAL REVIEW B
LA English
DT Article
ID FLUORESCENCE; STATES; DARK
AB Using the pseudopotential configuration-interaction method, we calculate the intrinsic lifetime and polarization of the radiative decay of single excitons (X), positive and negative trions (X+ and X-), and biexcitons (XX) in CdSe nanocrystal quantum dots. We investigate the effects of the inclusion of increasingly more complex many-body treatments, starting from the single-particle approach and culminating with the configuration-interaction scheme. Our configuration-interaction results for the size dependence of the single-exciton radiative lifetime at room temperature are in excellent agreement with recent experimental data. We also find the following. (i) Whereas the polarization of the bright exciton emission is always perpendicular to the hexagonal c axis, the polarization of the dark exciton switches from perpendicular to parallel to the hexagonal c axis in large dots, in agreement with experiment. (ii) The ratio of the radiative lifetimes of mono- and biexcitons tau(X):tau(XX) is similar to 1:1 in large dots (R=19.2 A). This ratio increases with decreasing nanocrystal size, approaching 2 in small dots (R=10.3 A). (iii) The calculated ratio tau(X+):tau(X-) between positive and negative trion lifetimes is close to 2 for all dot sizes considered.
C1 Univ Leeds, Sch Elect & Elect Engn, Inst Microwaves & Photon, Leeds LS2 9JT, W Yorkshire, England.
   Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Califano, M (reprint author), Univ Leeds, Sch Elect & Elect Engn, Inst Microwaves & Photon, Leeds LS2 9JT, W Yorkshire, England.
RI Zunger, Alex/A-6733-2013
NR 24
TC 54
Z9 54
U1 6
U2 41
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 11
AR 115401
DI 10.1103/PhysRevB.75.115401
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151ZK
UT WOS:000245329600106
ER

PT J
AU Choi, Y
   Jiang, JS
   Ding, Y
   Rosenberg, RA
   Pearson, JE
   Bader, SD
   Zambano, A
   Murakami, M
   Takeuchi, I
   Wang, ZL
   Liu, JP
AF Choi, Y.
   Jiang, J. S.
   Ding, Y.
   Rosenberg, R. A.
   Pearson, J. E.
   Bader, S. D.
   Zambano, A.
   Murakami, M.
   Takeuchi, I.
   Wang, Z. L.
   Liu, J. P.
TI Role of diffused Co atoms in improving effective exchange coupling in
   Sm-Co/Fe spring magnets
SO PHYSICAL REVIEW B
LA English
DT Article
ID PERMANENT-MAGNETS; ENERGY PRODUCT; THIN-FILMS; SCATTERING
AB In Sm-Co/Fe exchange-spring magnet films, the magnetization reversal processes of constituent elements and layers were studied with an emphasis on the role of diffused Co atoms. Enhanced coupling effectiveness was observed in a film with a graded interface where significant Co diffusion into the Fe layer was observed by means of electron microscopy. Comprehensive insight into the magnetization reversal processes was obtained by combining micromagnetic simulation with element- and depth-resolved x-ray resonant magnetic scattering. The approach unambiguously identifies distinctive composition profiles across the graded interface and provides the magnetization behavior of the diffused Co.
C1 Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA.
   Univ Texas, Dept Phys, Arlington, TX 76019 USA.
   Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA.
RP Choi, Y (reprint author), Argonne Natl Lab, Mat Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Wang, Zhong Lin/E-2176-2011; Rosenberg, Richard/K-3442-2012; Bader,
   Samuel/A-2995-2013; Ding, Yong/F-3705-2017
OI Wang, Zhong Lin/0000-0002-5530-0380; Ding, Yong/0000-0001-5805-347X
NR 18
TC 53
Z9 55
U1 2
U2 20
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104432
DI 10.1103/PhysRevB.75.104432
PG 6
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100077
ER

PT J
AU Cionca, CN
   Walko, DA
   Yacoby, Y
   Dorin, C
   Millunchick, JM
   Clarke, R
AF Cionca, C. N.
   Walko, D. A.
   Yacoby, Y.
   Dorin, C.
   Millunchick, J. Mirecki
   Clarke, R.
TI Interfacial structure, bonding and composition of InAs and GaSb thin
   films determined using coherent Bragg rod analysis
SO PHYSICAL REVIEW B
LA English
DT Article
ID SCANNING-TUNNELING-MICROSCOPY; MOLECULAR-BEAM EPITAXY; INAS/GASB
   SUPERLATTICES; OPTICAL-PROPERTIES; SEGREGATION; HETEROSTRUCTURES;
   DIFFRACTOMETER; GROWTH
AB We have used Bragg rod x-ray diffraction combined with a direct method of phase retrieval to extract atomic resolution electron-density maps of a complementary series of heteroepitaxial III-V semiconductor samples. From the three-dimensional electron-density maps we derive the monolayer spacings, the chemical compositions, and the characteristics of the bonding for all atomic planes in the film and across the film-substrate interface. InAs films grown on GaSb(001) under two different As conditions (using dimer or tetramer forms) both showed conformal roughness and mixed GaAs/InSb interfacial bonding character. The As tetramer conditions favored InSb bonding at the interface while, in the case of the dimer, the percentages corresponding to GaAs and InSb bonding were equal within the experimental error. The GaSb film grown on InAs(001) displayed significant In and As interdiffusion and had a relatively large fraction of GaAs-like bonds at the interface.
C1 Univ Michigan, Dept Phys, Appl Phys Program, Ann Arbor, MI 48109 USA.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel.
   Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA.
RP Cionca, CN (reprint author), Univ Michigan, Dept Phys, Appl Phys Program, Ann Arbor, MI 48109 USA.
EM codrin@umich.edu
NR 22
TC 6
Z9 6
U1 1
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 11
AR 115306
DI 10.1103/PhysRevB.75.115306
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151ZK
UT WOS:000245329600073
ER

PT J
AU Droubay, T
   Rosso, KM
   Heald, SM
   McCready, DE
   Wang, CM
   Chambers, SA
AF Droubay, T.
   Rosso, K. M.
   Heald, S. M.
   McCready, D. E.
   Wang, C. M.
   Chambers, S. A.
TI Structure, magnetism, and conductivity in epitaxial Ti-doped alpha-Fe2O3
   hematite: Experiment and density functional theory calculations
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRONIC-STRUCTURE; ILMENITE; GROWTH; SN
AB We explore the feasibility of growing epitaxial Ti-doped alpha-Fe2O3 hematite in which Ti(IV) substitutes for Fe(III) preferentially in one magnetic sublattice but not the other. Such a structure has been predicted by first-principles theory to be energetically favorable, and is expected to yield interesting and useful magnetic and electronic properties. However, we find experimentally that a majority of Ti dopants disperse and occupy random cation sites in both magnetic sublattices. Density functional theory predicts that the magnetically ordered and magnetically random structures are nearly isoenergetic.
C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA.
   Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Droubay, T (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, POB 999,MSIN K8-93, Richland, WA 99352 USA.
EM tim.droubay@pnl.gov
RI Droubay, Tim/D-5395-2016
OI Droubay, Tim/0000-0002-8821-0322
NR 23
TC 55
Z9 57
U1 3
U2 51
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104412
DI 10.1103/PhysRevB.75.104412
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100057
ER

PT J
AU Goddard, PA
   Singleton, J
   Sharma, ALL
   Morosan, E
   Blundell, SJ
   Bud'ko, SL
   Canfield, PC
AF Goddard, P. A.
   Singleton, J.
   Sharma, A. L. Lima
   Morosan, E.
   Blundell, S. J.
   Bud'ko, S. L.
   Canfield, P. C.
TI Separation of energy scales in the kagome antiferromagnet TmAgGe: A
   magnetic-field-orientation study up to 55 T
SO PHYSICAL REVIEW B
LA English
DT Article
AB TmAgGe is an antiferromagnet in which the spins are confined to distorted kagome-like planes at low temperatures. We report angle-dependent measurements of the magnetization M in fields of up to 55 T that show that there are two distinct and separate energy scales present in TmAgGe, each responsible for a set of step-like metamagnetic transitions: weak exchange interactions and strong crystalline-electric-field (CEF) interactions. Simulations of M using a three-dimensional, free-energy minimization technique allow us to specify the physical origin of the metamagnetic transitions in low, in-plane fields. We also show that the transitions observed with the field perpendicular to the kagome planes are associated with the CEF-split multiplet of Tm.
C1 Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England.
   Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
   Iowa State Univ, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Goddard, PA (reprint author), Univ Oxford, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England.
RI Canfield, Paul/H-2698-2014; Goddard, Paul/A-8638-2015
OI Goddard, Paul/0000-0002-0666-5236
NR 10
TC 7
Z9 7
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094426
DI 10.1103/PhysRevB.75.094426
PG 5
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500064
ER

PT J
AU Hoch, MJR
   Kuhns, PL
   Moulton, WG
   Reyes, AP
   Torija, MA
   Mitchell, JF
   Leighton, C
AF Hoch, M. J. R.
   Kuhns, P. L.
   Moulton, W. G.
   Reyes, A. P.
   Torija, M. A.
   Mitchell, J. F.
   Leighton, C.
TI Disorder and double-exchange spin dynamics in La0.7Sr0.3MnO3 and
   La0.7Sr0.3CoO3 from NMR hyperfine couplings
SO PHYSICAL REVIEW B
LA English
DT Article
ID NUCLEAR MAGNETIC RELAXATION; TRANSITION METALS; MANGANITES;
   LA1-XSRXMNO3; LACOO3; MAGNETORESISTANCE; POLARIZATION; DISTORTIONS;
   TRANSPORT; CRYSTALS
AB The hole-doped transition metal oxides La1-xSrxMnO3 (LSMO) and La1-xSrxCoO3 (LSCO) show certain similarities to each other in their physical properties but also marked differences. In the metallic-ferromagnetic doping range, important properties of these materials, such as nanoscale phase separation, are due to competing double-exchange ordering interactions and disordering Jahn-Teller (JT) distortions. The present experiments have used low magnetic field NMR of the Mn-55 and Co-59 transition metal ion nuclei in x=0.3 samples to obtain information on changes in hyperfine couplings and spin dynamics as a function of temperature. At low temperatures, anisotropy effects linked to lattice distortions are more important in LSCO than in LSMO. Structural distortions become important in LSMO above 120 K.
C1 Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
   Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA.
   Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Hoch, MJR (reprint author), Florida State Univ, Natl High Magnet Field Lab, 1800 E Paul Dirac Dr, Tallahassee, FL 32310 USA.
NR 47
TC 12
Z9 12
U1 5
U2 22
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104421
DI 10.1103/PhysRevB.75.104421
PG 9
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100066
ER

PT J
AU Karaiskaj, D
   Mascarenhas, A
   Choi, JH
   Graff, R
   Strano, MS
AF Karaiskaj, D.
   Mascarenhas, A.
   Choi, Jong Hyun
   Graff, Rachel
   Strano, Michael S.
TI Temperature behavior of the photoluminescence decay of semiconducting
   carbon nanotubes: The effective lifetime
SO PHYSICAL REVIEW B
LA English
DT Article
AB The temperature dependence of the photoluminescence decay of excitons in single-walled carbon nanotubes was measured for two nanotube species, (7,6) and (7,5), representative of the two nanotube (n-m)mod 3 families. A monotonic increase of the photoluminescence lifetime with decreasing temperature is observed. The external strain induced by lowering the temperature below the freezing point of the solution leads to an overall lowering of the photoluminescence lifetime. This effect indicates that the measured lifetime is defined by the intrinsic electronic properties of carbon nanotubes and could be understood as an exchange interaction between bright and dark excitonic states. We find the lifetime to vary between 223 and 319 ps between 290 and 5 K, obtained by a multiexponential fit, well in agreement with previous experiments.
C1 Natl Renewable Energy Lab, Ctr Basic Sci, Golden, CO 80401 USA.
   Univ Illinois, Dept Chem & Biomed Engn, Urbana, IL 61801 USA.
RP Karaiskaj, D (reprint author), Natl Renewable Energy Lab, Ctr Basic Sci, 1617 Cole Blvd, Golden, CO 80401 USA.
EM denis_karaiskaj@nrel.gov
RI Zhou, Charlie/N-5376-2015
NR 21
TC 5
Z9 5
U1 0
U2 10
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 11
AR 113409
DI 10.1103/PhysRevB.75.113409
PG 4
WC Physics, Condensed Matter
SC Physics
GA 151ZK
UT WOS:000245329600026
ER

PT J
AU Karaiskaj, D
   Mascarenhas, A
AF Karaiskaj, D.
   Mascarenhas, A.
TI Role of electron-phonon interactions and external strain on the
   electronic properties of semiconducting carbon nanotubes
SO PHYSICAL REVIEW B
LA English
DT Article
ID DEPENDENT EXCITON LINEWIDTHS; GAAS QUANTUM-WELLS;
   TEMPERATURE-DEPENDENCE; CRITICAL-POINTS; DIRECT-GAP; SCATTERING;
   PRESSURE; BROADENINGS; GERMANIUM; GE
AB The electron-phonon interactions determine the temperature dependent photoluminescence of semiconducting carbon nanotubes. Both effects, the energy shifts and spectral narrowing of the transitions, can be attributed to the electron-phonon interaction. In this paper, we present an accurate measurement of the temperature induced broadening of the photoluminescence transitions of carbon nanotubes, and model this broadening in terms of the theory, previously used to model the thermal broadening of critical points in conventional semiconductors. Through this fitting procedure, parameters could be estimated which provide important insight into the strength of the electron-phonon interactions. Moreover, careful studies of the energy shifts induced by the external strain had revealed a n-m family behavior. We further conclude that using a mathematical expression that combines the theory of semiconducting carbon nanotubes under hydrostatic pressure and strain, this family behavior observed experimentally could be theoretically reproduced, providing tools to model and predict the effect of strain on the electronic properties of carbon nanotubes.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Karaiskaj, D (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM denis_karaiskaj@nrel.gov
NR 47
TC 7
Z9 7
U1 1
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 11
AR 115426
DI 10.1103/PhysRevB.75.115426
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151ZK
UT WOS:000245329600131
ER

PT J
AU Kim, ND
   Kim, YK
   Park, CY
   Yeom, HW
   Koh, H
   Rotenberg, E
   Ahn, JR
AF Kim, N. D.
   Kim, Y. K.
   Park, C. -Y.
   Yeom, H. W.
   Koh, H.
   Rotenberg, E.
   Ahn, J. R.
TI High-resolution photoemission spectroscopy study of the single-domain
   Si(110)-16x2 surface
SO PHYSICAL REVIEW B
LA English
DT Article
ID CORE-LEVEL SPECTROSCOPY; 16X2 SURFACE; RECONSTRUCTIONS; MODEL; 2X1
AB We have investigated the valence band structure and Si 2p photoemission spectra of the single-domain Si(110)-16x2 surface with higher resolution than previous studies. We found that the highest occupied surface state, reported to be dispersive in the previous studies, is resolved into the two surface states with flat energy dispersions. This reveals that the two surface states are not produced by Si pi-bonded chains, as suggested in the previous studies, but originate from the building blocks with spatially localized electronic structures such as a Si tetramer and a Si adatom. Si 2p line shapes show directly five surface components without any curve fitting. Various atomic structure models, especially the adatom-tetramer-interstitial model, of the Si(110)-16x2 surface are considered to figure out the atomistic origins of the surface components and states.
C1 Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
   Sungkyunkwan Univ, Inst Basic Sci, Suwon 440746, South Korea.
   Sungkyunkwan Univ, CNNC, Suwon 440746, South Korea.
   Yonsei Univ, Ctr Atom Wires & Layers, Seoul 120746, South Korea.
   Yonsei Univ, Inst Phys & Appl Phys, Seoul 120746, South Korea.
   Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
RP Park, CY (reprint author), Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea.
EM cypark@skku.edu; jrahn@skku.edu
RI Rotenberg, Eli/B-3700-2009
OI Rotenberg, Eli/0000-0002-3979-8844
NR 20
TC 19
Z9 19
U1 1
U2 10
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 12
AR 125309
DI 10.1103/PhysRevB.75.125309
PG 5
WC Physics, Condensed Matter
SC Physics
GA 151ZQ
UT WOS:000245330200058
ER

PT J
AU Kuklja, MM
   Rashkeev, SN
AF Kuklja, Maija M.
   Rashkeev, Sergey N.
TI Shear-strain-induced structural and electronic modifications of the
   molecular crystal 1,1-diamino-2,2-dinitroethylene: Slip-plane flow and
   band gap relaxation
SO PHYSICAL REVIEW B
LA English
DT Article
ID TOTAL-ENERGY CALCULATIONS; PENTAERYTHRITOL TETRANITRATE; DECOMPOSITION;
   EXCITATIONS; ORIENTATION; INITIATION; DYNAMICS; SOLIDS
AB First-principles calculations of the structural and electronic properties of the deformed molecular crystal 1,1-diamino-2,2-dinitroethylene (FOX-7) under shear-strain loading are presented. The reaction of the crystal to applied shear-strain loading is found to be highly anisotropic. When the external loading is removed, the relaxation of the system is mainly defined by stretching, bending, and rotations of the NO2 groups of neighboring molecules from the two adjacent zigzag-shaped crystalline planes that were initially shifted. In general, the deformed molecular crystal relaxes to its initial, ideal crystalline FOX-7 structure. However, different planes remain shifted relatively to each other on vectors, which are typically incommensurated with any translational vector of the ideal crystal. This fact makes an existence of ideal crystals of this material quite problematic. We also found that no metallization occurs under shear-strain loading. We suggest that the considered mechanisms of the shear-strain relaxation of the structural and electronic degrees of freedom are typical for layered anisotropic molecular crystals, and that they should significantly affect their chemical reactivity, conductivity, optical properties, and initiation of detonation in energetic materials.
C1 Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA.
   Natl Sci Fdn, Div Sci Mat, Arlington, VA 22203 USA.
   Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
RP Kuklja, MM (reprint author), Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA.
NR 31
TC 49
Z9 50
U1 0
U2 8
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104111
DI 10.1103/PhysRevB.75.104111
PG 10
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100021
ER

PT J
AU Kvashnina, KO
   Butorin, SM
   Shuh, DK
   Guo, JH
   Werme, L
   Nordgren, J
AF Kvashnina, K. O.
   Butorin, S. M.
   Shuh, D. K.
   Guo, J. -H.
   Werme, L.
   Nordgren, J.
TI Resonant inelastic x-ray scattering of curium oxide
SO PHYSICAL REVIEW B
LA English
DT Article
ID HARTREE-FOCK CALCULATIONS; CRYSTAL-FIELD ANALYSIS; ELECTRONIC-STRUCTURE;
   SPECTROSCOPY; CM3+; PHOTOABSORPTION; APPROXIMATION; FLUORESCENCE;
   EXCITATIONS; ABSORPTION
AB The measurements on radioactive actinide isotopes (curium-248) were performed using very small sample quantities (micrograms) to minimize the sample activity. Resonant inelastic x-ray scattering (RIXS) spectra of curium oxide at the Cm 5d edge were measured for the first time. RIXS data are compared with theoretical calculations using atomic multiplet theory. The results indicate that isotope curium -248 in the curium oxide sample has oxidation state III due to the best agreement with RIXS calculations for Cm (III) instead of those for Cm (IV).
C1 Uppsala Univ, Dept Phys, SE-75121 Uppsala, Sweden.
   Lawrence Berkeley Natl Lab, Chem Sci Div, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
   SKB, Stockholm, Sweden.
RP Kvashnina, KO (reprint author), Uppsala Univ, Dept Phys, Box 530, SE-75121 Uppsala, Sweden.
EM Kristina.Kvashnina@fysik.uu.se
RI Kvashnina, Kristina/O-2374-2016
OI Kvashnina, Kristina/0000-0003-4447-4542
NR 32
TC 6
Z9 6
U1 1
U2 19
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 11
AR 115107
DI 10.1103/PhysRevB.75.115107
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151ZK
UT WOS:000245329600035
ER

PT J
AU Lancaster, T
   Blundell, SJ
   Brooks, ML
   Baker, PJ
   Pratt, FL
   Manson, JL
   Conner, MM
   Xiao, F
   Landee, CP
   Chaves, FA
   Soriano, S
   Novak, MA
   Papageorgiou, TP
   Bianchi, AD
   Herrmannsdorfer, T
   Wosnitza, J
   Schlueter, JA
AF Lancaster, T.
   Blundell, S. J.
   Brooks, M. L.
   Baker, P. J.
   Pratt, F. L.
   Manson, J. L.
   Conner, M. M.
   Xiao, F.
   Landee, C. P.
   Chaves, F. A.
   Soriano, S.
   Novak, M. A.
   Papageorgiou, T. P.
   Bianchi, A. D.
   Herrmannsdoerfer, T.
   Wosnitza, J.
   Schlueter, J. A.
TI Magnetic order in the S=1/2 two-dimensional molecular antiferromagnet
   copper pyrazine perchlorate Cu(Pz)(2)(ClO4)(2)
SO PHYSICAL REVIEW B
LA English
DT Article
ID SPIN-1/2 HEISENBERG-ANTIFERROMAGNET; SQUARE-LATTICE; MONTE-CARLO; MUONS;
   OXIDES; FIELD
AB We present an investigation of magnetic ordering in the two-dimensional S=1/2 quantum magnet Cu(Pz)(2)(ClO4)(2) using specific heat and zero-field muon-spin relaxation (mu+SR). The magnetic contribution to the specific heat is consistent with an exchange strength of 17.7(3) K. We find unambiguous evidence for a transition to a state of three-dimensional long-range order below a critical temperature T-N=4.21(1) K using mu+SR even though there is no feature in the specific heat at that temperature. The absence of a specific heat anomaly at T-N is consistent with recent theoretical predictions. The ratio of T-N/J=0.24 corresponds to a ratio of intralayer to interlayer exchange constants of parallel to J(')/J parallel to=6.8x10(-4), indicative of excellent two-dimensional isolation. The scaled magnetic specific heat of [Cu(Pz)(2)(HF2)]BF4, a compound with an analogous structure, is very similar to that of Cu(Pz)(2)(ClO4)(2) although both differ slightly from the predicted value for an ideal 2D S=1/2 Heisenberg antiferromagnet.
C1 Univ Oxford, Clarendon Lab, Dept Phys, Oxford OX1 3PU, England.
   Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
   Eastern Washington Univ, Dept Chem & Biochem, Cheney, WA 99004 USA.
   Clark Univ, Dept Phys, Worcester, MA 01610 USA.
   UFRJ, Inst Fis, BR-21945970 Rio De Janeiro, Brazil.
   Rossendorf Inc, Forschungszentrum Rossendorf EV, HLD, D-01314 Dresden, Germany.
   Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Lancaster, T (reprint author), Univ Oxford, Clarendon Lab, Dept Phys, Parks Rd, Oxford OX1 3PU, England.
EM t.lancaster@physics.ox.ac.uk
RI Baker, Peter/E-4216-2010; Novak, Miguel/J-7640-2012; Herrmannsdorfer,
   Thomas/K-5888-2015; Bianchi, Andrea/E-9779-2010
OI Baker, Peter/0000-0002-2306-2648; Bianchi, Andrea/0000-0001-9340-6971
NR 30
TC 44
Z9 44
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094421
DI 10.1103/PhysRevB.75.094421
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500059
ER

PT J
AU Lopatin, AV
   Vinokur, VM
AF Lopatin, A. V.
   Vinokur, V. M.
TI Hopping transport in granular superconductors
SO PHYSICAL REVIEW B
LA English
DT Article
ID CONDUCTIVITY; FILMS; METAL
AB We investigate hopping transport in granular superconductors in the weak-coupling insulating regime and find that it is governed by the interplay between the granule charging energy E-c and the single granule superconducting gap Delta. At E-c>Delta, the transport is mediated by single electron hopping, while at E-c <Delta, the transport is dominated by hopping of Cooper pairs. We show that in the former case and at low temperatures, T <Delta < E-c, superconducting pairing suppresses inelastic cotunneling processes, giving rise to giant negative magnetoresistance. We find the range of intermediate temperatures where transport is dominated by inelastic cotunneling but having an activation temperature behavior; this regime is specific to granular superconductors. We investigate different conductivity regimes and construct a transport phase diagram.
C1 Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA.
RP Lopatin, AV (reprint author), Argonne Natl Lab, Mat Sci Div, Argonne, IL 60439 USA.
NR 15
TC 13
Z9 13
U1 0
U2 10
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 092201
DI 10.1103/PhysRevB.75.092201
PG 4
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500004
ER

PT J
AU Mamin, RF
   Egami, T
   Marton, Z
   Migachev, SA
AF Mamin, R. F.
   Egami, T.
   Marton, Z.
   Migachev, S. A.
TI Giant dielectric permittivity and magnetocapacitance in
   La0.875Sr0.125MnO3 single crystals
SO PHYSICAL REVIEW B
LA English
DT Article
ID PHASE-SEPARATION; METAL TRANSITION; LA1-XSRXMNO3; MANGANITES;
   RESISTIVITY; MAGNETORESISTANCE; CONDUCTIVITY; DIAGRAM; MODELS
AB We report the observation of extremely high dielectric permittivity exceeding 10(9) and magnetocapacitance of the order of 10(4)% in La0.875Sr0.125MnO3 single crystal. This phenomenon is observed below 270 K, and it exhibits a history dependence. These effects may be the consequence of strong competition and interplay among the charge, orbital, and spin degrees of freedom, resulting in nanoscale charge and spin dynamic inhomogeneities in the prepercolation regime of the phase segregation.
C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   RAS, Zavoisky Phys Tech Inst, Kazan 420029, Russia.
   Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA.
RP Mamin, RF (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
EM mamin@kfti.knc.ru
NR 35
TC 26
Z9 26
U1 1
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 11
AR 115129
DI 10.1103/PhysRevB.75.115129
PG 4
WC Physics, Condensed Matter
SC Physics
GA 151ZK
UT WOS:000245329600057
ER

PT J
AU Melko, RG
   Fishman, RS
   Reboredo, FA
AF Melko, Roger G.
   Fishman, Randy S.
   Reboredo, Fernando A.
TI Single layer of Mn in a GaAs quantum well: A ferromagnet with quantum
   fluctuations
SO PHYSICAL REVIEW B
LA English
DT Article
ID RANGE ORDER; SEMICONDUCTORS; (GA,MN)AS
AB Some of the highest transition temperatures achieved for Mn-doped GaAs have been in delta-doped heterostructures with well-separated planes of Mn. In the absence of magnetic anisotropy, the Mermin-Wagner theorem implies that a single plane of magnetic ions cannot be ferromagnetic. Using a Heisenberg model, we show that the same mechanism that produces magnetic frustration and suppresses the transition temperature in bulk Mn-doped GaAs, due to the difference between the light and heavy band masses, can stabilize ferromagnetic order for a single layer of Mn in a GaAs quantum well. This comes at the price of quantum fluctuations that suppress the ordered moment from that of a fully saturated ferromagnet. By comparing the predictions of Heisenberg and Kohn-Luttinger models, we conclude that the Heisenberg description of a Mn-doped GaAs quantum well breaks down when the Mn concentration becomes large, but works quite well in the weak-coupling limit of small Mn concentrations. This comparison allows us to estimate the size of the quantum fluctuations in the quantum well.
C1 Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RP Melko, RG (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA.
RI Reboredo, Fernando/B-8391-2009; Fishman, Randy/C-8639-2013
NR 27
TC 6
Z9 6
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 11
AR 115316
DI 10.1103/PhysRevB.75.115316
PG 7
WC Physics, Condensed Matter
SC Physics
GA 151ZK
UT WOS:000245329600083
ER

PT J
AU Meslin, E
   Fu, CC
   Barbu, A
   Gao, F
   Willaime, F
AF Meslin, E.
   Fu, Chu-Chun
   Barbu, A.
   Gao, F.
   Willaime, F.
TI Theoretical study of atomic transport via interstitials in dilute Fe-P
   alloys
SO PHYSICAL REVIEW B
LA English
DT Article
ID IRON-ALLOYS; PHOSPHORUS SEGREGATION; ELECTRON-IRRADIATION;
   GRAIN-BOUNDARIES; FERRITIC STEELS; DIMER METHOD; ALPHA-IRON; AB-INITIO;
   DEFECTS; BCC
AB By combining density functional theory, empirical potential, and atomic transport model approaches, we investigate the energetics and the diffusion properties of P interstitials in dilute Fe-P alloys. Although P is a substitutional impurity in alpha-iron, when a self-interstitial atom (SIA) approaches a substitutional P, the P atom becomes interstitial with an energy gain of up to 1.0 eV. The octahedral and the < 110 > mixed dumbbell are the lowest-energy configurations with similar stabilities. The P atoms are highly mobile in both configurations. The transitions between these two configurations also require low activation energies. The most likely mechanisms leading to long-distance diffusion of a P interstitial are proposed by ab initio calculations. The resulting effective diffusion energy estimated by the transport model is 0.19 eV, which agrees with the result from resistivity recovery experiments, suggesting that the Fe-P mixed dumbbells are more mobile than the SIAs. The fast-migrating P interstitial can be deeply trapped by a substitutional P atom. The resulting complexes are very stable with a binding energy of around 1.0 eV. Their mobilities are investigated by means of the dimer method using an Fe-P empirical potential. A comparison between the present predictions and existing experimental results is also discussed.
C1 CEA Saclay, Serv Rech Met Phys, F-91191 Gif Sur Yvette, France.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Meslin, E (reprint author), CEA Saclay, Serv Rech Met Phys, F-91191 Gif Sur Yvette, France.
RI Gao, Fei/H-3045-2012; Fu, Chu-Chun/L-5046-2016
OI Fu, Chu-Chun/0000-0003-4369-8296
NR 34
TC 26
Z9 26
U1 0
U2 9
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094303
DI 10.1103/PhysRevB.75.094303
PG 8
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500037
ER

PT J
AU Moore, JE
   Balents, L
AF Moore, J. E.
   Balents, L.
TI Topological invariants of time-reversal-invariant band structures
SO PHYSICAL REVIEW B
LA English
DT Article
AB The topological invariants of a time-reversal-invariant band structure in two dimensions are multiple copies of the Z(2) invariant found by Kane and Mele. Such invariants protect the "topological insulator" phase and give rise to a spin Hall effect carried by edge states. Each pair of bands related by time reversal is described by one Z(2) invariant, up to one less than half the dimension of the Bloch Hamiltonians. In three dimensions, there are four such invariants per band pair. The Z(2) invariants of a crystal determine the transitions between ordinary and topological insulators as its bands are occupied by electrons. We derive these invariants using maps from the Brillouin zone to the space of Bloch Hamiltonians and clarify the connections between Z(2) invariants, the integer invariants that underlie the integer quantum Hall effect, and previous invariants of T-invariant Fermi systems.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
RP Moore, JE (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Moore, Joel/O-4959-2016
OI Moore, Joel/0000-0002-4294-5761
NR 22
TC 1146
Z9 1153
U1 22
U2 164
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 12
AR 121306
DI 10.1103/PhysRevB.75.121306
PG 4
WC Physics, Condensed Matter
SC Physics
GA 151ZQ
UT WOS:000245330200010
ER

PT J
AU Murdick, DA
   Wadley, HNG
   Zhou, XW
AF Murdick, D. A.
   Wadley, H. N. G.
   Zhou, X. W.
TI Condensation mechanisms of an arsenic-rich vapor on GaAs(001) surfaces
SO PHYSICAL REVIEW B
LA English
DT Article
ID MOLECULAR-BEAM EPITAXY; SCANNING-TUNNELING-MICROSCOPY; INCORPORATION
   KINETICS; GAAS-SURFACES; COMPUTER-SIMULATIONS; GROWTH; DYNAMICS;
   DIFFUSION; GALLIUM; RECONSTRUCTIONS
AB The homoepitaxial assembly of a (001) GaAs surface from atomic gallium and molecular As-2 vapor fluxes has been investigated with molecular dynamics simulations using a recently developed bond-order potential. The approach enables dynamic atomic assembly events to be observed as atoms condense to form thin film structures. During simulation of epitaxial growth, we observed a temperature-dependent arsenic solubility limit consistent with experimental results. The As-2 sticking probabilities and dynamic dimer-surface binding states for both gallium- and arsenic-terminated (001) surfaces were also explored. On gallium-terminated surfaces, significant switching between two weakly bound precursor states and an intermediate chemisorbed state was observed during the surface diffusion of arsenic dimers. The switching frequency was strongly temperature dependent. The arsenic dimers bound to arsenic-terminated surfaces were found to be more likely to desorb (instead of diffuse) when thermally perturbed from their adsorption sites. This sticking probability was strongly dependent on surface temperature, atomic adsorption site environment, and the orientation of the incoming dimer.
C1 Univ Virginia, Sch Engn & Appl Sci, Charlottesville, VA 22904 USA.
   Sandia Natl Labs, Mech Mat Dept, Livermore, CA 94550 USA.
RP Murdick, DA (reprint author), Univ Virginia, Sch Engn & Appl Sci, Charlottesville, VA 22904 USA.
EM murdick@mailaps.org
RI Murdick, Dewey/A-5849-2008; Schaff, William/B-5839-2009
NR 48
TC 9
Z9 10
U1 2
U2 9
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 12
AR 125318
DI 10.1103/PhysRevB.75.125318
PG 12
WC Physics, Condensed Matter
SC Physics
GA 151ZQ
UT WOS:000245330200067
ER

PT J
AU Nussinov, Z
   Batista, CD
   Normand, B
   Trugman, SA
AF Nussinov, Z.
   Batista, C. D.
   Normand, B.
   Trugman, S. A.
TI High-dimensional fractionalization and spinon deconfinement in
   pyrochlore antiferromagnets
SO PHYSICAL REVIEW B
LA English
DT Article
ID VALENCE-BOND STATE; SPIN-1/2 HEISENBERG-ANTIFERROMAGNET;
   TRANSITION-METAL COMPOUNDS; GROUND-STATES; QUANTUM ANTIFERROMAGNETS;
   STATISTICAL-MECHANICS; PHASE-TRANSITIONS; GLASS-TRANSITION; RESIDUAL
   ENTROPY; GAUGE-THEORIES
AB The ground states of Klein-type spin models on the pyrochlore and checkerboard lattice are spanned by the set of singlet dimer coverings and thus possess an extensive ground-state degeneracy. Among the many exotic consequences is the presence of deconfined fractional excitations (spinons), which propagate through the entire system. While a realistic electronic model on the pyrochlore lattice is close to the Klein point, this point is, in fact, inherently unstable because any perturbation epsilon restores spinon confinement at T=0. We demonstrate that deconfinement is recovered in the finite-temperature region epsilon < T < J, where the deconfined phase can be characterized as a dilute Coulomb gas of thermally excited spinons. We investigate the zero-temperature phase diagram away from the Klein point by means of a variational approach based on the singlet dimer coverings of the pyrochlore lattices and by taking into account their nonorthogonality. We find that in these systems, nearest-neighbor exchange interactions do not lead to Rokhsar-Kivelson-type processes.
C1 Washington Univ, Dept Phys, St Louis, MO 63130 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
   Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina.
RP Nussinov, Z (reprint author), Washington Univ, Dept Phys, Compton Hall,1 Brookings Dr, St Louis, MO 63130 USA.
RI Normand, Bruce/L-5245-2013; Batista, Cristian/J-8008-2016; 
OI Trugman, Stuart/0000-0002-6688-7228
NR 99
TC 43
Z9 43
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094411
DI 10.1103/PhysRevB.75.094411
PG 23
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500049
ER

PT J
AU Paudyal, D
   Pecharsky, VK
   Gschneidner, KA
   Harmon, BN
AF Paudyal, Durga
   Pecharsky, V. K.
   Gschneidner, K. A., Jr.
   Harmon, B. N.
TI Magnetism of Gd5Ge4 from first principles
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRONIC-STRUCTURE; MAGNETOOPTICAL PROPERTIES; CORRELATION-ENERGY;
   GD-5(SI2GE2); SYSTEMS; APPROXIMATION; SILICON
AB The origin of ferromagnetism appearing as a result of a magnetic-field-induced first-order phase transition in Gd5Ge4 is explored by calculating the total energy, local exchange splitting, density of states, and magnetic moments. The calculations were performed using the tight-binding linear muffin-tin orbital method within the nonlocal exchange correlation parametrization in the density functional theory including the on-site Coulomb interaction parameter. The total energy as a function of shear distortion along the a axis for two different orthorhombic structures is in agreement with experiment, indicating a first-order magnetostructural transition in Gd5Ge4. The rearrangement of Gd 5d and Ge 4p densities of states, the substantial differences in atom-projected band energies, the exchange splitting, and the magnetic moments calculated with ferromagnetic spin arrangements in the orthorhombic Sm5Ge4-type and Gd5Si4-type structures of Gd5Ge4 help to clarify the differences in the magnetic states of these two structures. Our calculations indicate that the Sm5Ge4-type structure of Gd5Ge4 is the structural ground state and that it is antiferromagnetic.
C1 Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
   Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA.
   Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA.
RP Pecharsky, VK (reprint author), Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA.
EM vitkp@ameslab.gov
NR 43
TC 33
Z9 33
U1 0
U2 10
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 094427
DI 10.1103/PhysRevB.75.094427
PG 6
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500065
ER

PT J
AU Qian, MC
   Ong, SV
   Khanna, SN
   Knickelbein, MB
AF Qian, Meichun
   Ong, Stephen V.
   Khanna, Shiv N.
   Knickelbein, Mark B.
TI Magnetic endohedral metallofullerenes with floppy interiors
SO PHYSICAL REVIEW B
LA English
DT Article
ID MRI CONTRAST AGENTS; NICKEL CLUSTERS; TRANSITION-METAL; MOLECULAR-BEAM;
   GD3N-AT-C-80; TEMPERATURE; GD3N
AB It is shown that Gd3N@C-80 is a highly magnetic and very stable motif that allows enhanced contrast magnetic resonance imaging and electric dipole moment with potential for cancer treatment. Using a synergistic approach combining Stern-Gerlach experiments in beams and first-principles electronic structure studies, it is demonstrated that an isolated Gd3N has a ground state spin moment of 23 mu(B) followed by a noncollinear state of 17.2 mu(B) only 88 meV above the ground state. The large moment is largely due to localized f electrons. As a Gd3N is embedded inside a C-80 cage, the localized f electrons maintain the magnetic character while the hybridization between the s, d states of isolated Gd3N and p states of C-80 leads to a strongly bound motif with an interaction energy of 13.63 eV and a large highest-occupied-molecular-orbital-lowest-unoccupied-molecular-orbital gap of 1.48 eV. Gd3N@C-80 is further shown to possess two isomers corresponding to the location of the N atom on either side of the Gd-3 triangle with an appreciable electric dipole moment and a low barrier of 91 meV for transition between them offering potential for a fluctuating dipole.
C1 Virginia Commonwealth Univ, Dept Phys, Richmond, VA 23284 USA.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Khanna, SN (reprint author), Virginia Commonwealth Univ, Dept Phys, Richmond, VA 23284 USA.
EM snkhanna@vcu.edu
NR 40
TC 19
Z9 19
U1 1
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104424
DI 10.1103/PhysRevB.75.104424
PG 6
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100069
ER

PT J
AU Rusydi, A
   Berciu, M
   Abbamonte, P
   Smadici, S
   Eisaki, H
   Fujimaki, Y
   Uchida, S
   Rubhausen, M
   Sawatzky, GA
AF Rusydi, A.
   Berciu, M.
   Abbamonte, P.
   Smadici, S.
   Eisaki, H.
   Fujimaki, Y.
   Uchida, S.
   Ruebhausen, M.
   Sawatzky, G. A.
TI Relationship between hole density and charge-ordering wave vector in
   Sr14-xCaxCu24O41
SO PHYSICAL REVIEW B
LA English
DT Article
ID X-RAY-ABSORPTION; SPIN-LADDER; MAGNETIC EXCITATIONS; MATERIAL
   SR14CU24O41; DYNAMICS; SUPERCONDUCTIVITY; NMR
AB The distribution of holes in Sr14-xCaxCu24O41 is revisited with semiempirical reanalysis of the x-ray absorption data and exact diagonalization cluster calculations. Another interpretation of the XAS data leads to much larger ladder hole densities than previously suggested. These new hole densities lead to a simple interpretation of the hole Wigner crystal recently reported with 1/3 and 1/5 wave vectors along the ladder. Our interpretation is consistent with paired holes in the rung of the ladders. Exact diagonalization results for a minimal model of the doped ladders suggest that the stabilization of spin structures consisting of 4 spins in a square plaquette as a result of resonance valence bond physics suppresses the hole crystal with a 1/4 wave vector.
C1 Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
   Univ Groningen, Mat Sci Ctr, NL-9747 AG Groningen, Netherlands.
   Univ Hamburg, Inst Angewandte Phys, D-20355 Hamburg, Germany.
   Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
   Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
   Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA.
   AIST, Nanoelect Res Inst, Tsukuba 3058568, Japan.
   Univ Tokyo, Dept Semicond, Tokyo 113, Japan.
RP Rusydi, A (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA.
RI Sawatzky, George/D-2997-2012; Berciu, Mona/O-4889-2014; Rusydi,
   Andrivo/I-1849-2016
NR 31
TC 31
Z9 33
U1 0
U2 6
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104510
DI 10.1103/PhysRevB.75.104510
PG 5
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100087
ER

PT J
AU Schafer, J
   Hoinkis, M
   Rotenberg, E
   Blaha, P
   Claessen, R
AF Schaefer, J.
   Hoinkis, M.
   Rotenberg, Eli
   Blaha, P.
   Claessen, R.
TI Spin-polarized standing waves at an electronically matched interface
   detected by Fermi-surface photoemission
SO PHYSICAL REVIEW B
LA English
DT Article
ID QUANTUM-WELL STATES; GIANT MAGNETORESISTANCE; FERROMAGNETIC-FILMS;
   TRANSMISSION; SUPERLATTICES; MOTION; IRON
AB Highly spin-polarized reflection at an interface of a ferromagnetic thin film is made visible by photoelectron spectroscopy. The technique of k-space mapping of the exchange-split Fermi surface is employed to detect standing waves confined to the ferromagnetic layer. A drastic spin asymmetry of this effect is achieved for a specific matching of the Fermi-surface topologies of film and substrate, respectively. For Fe(110) films on a W substrate, intense standing waves are obtained exclusively for majority states, while minority states are virtually unaffected by the boundary.
C1 Univ Wurzburg, Phys Inst, D-97074 Wurzburg, Germany.
   Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany.
   Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   Tech Univ Wien, Inst Materialchem, A-1060 Vienna, Austria.
RP Schafer, J (reprint author), Univ Wurzburg, Phys Inst, D-97074 Wurzburg, Germany.
RI Blaha, Peter/F-2847-2010; Rotenberg, Eli/B-3700-2009; Claessen,
   Ralph/A-2045-2017
OI Rotenberg, Eli/0000-0002-3979-8844; Claessen, Ralph/0000-0003-3682-6325
NR 24
TC 5
Z9 5
U1 0
U2 4
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 9
AR 092401
DI 10.1103/PhysRevB.75.092401
PG 4
WC Physics, Condensed Matter
SC Physics
GA 151YZ
UT WOS:000245328500008
ER

PT J
AU Trimarchi, G
   Zunger, A
AF Trimarchi, Giancarlo
   Zunger, Alex
TI Global space-group optimization problem: Finding the stablest crystal
   structure without constraints
SO PHYSICAL REVIEW B
LA English
DT Article
ID HIGH-PRESSURE PHASES; SHORT-RANGE ORDER; MOLECULAR-DYNAMICS; III-V;
   SEMICONDUCTOR ALLOYS; ELECTRONIC-STRUCTURE; BINARY COMPOUNDS; ENERGY;
   STABILITY; TRANSITIONS
AB Finding the most stable structure of a solid is one of the central problems in condensed matter physics. This entails finding both the lattice type (e.g., fcc, bcc, and orthorhombic) and (for compounds) the decoration of the lattice sites by atoms of types A, B, etc. ("configuration"). Most approaches to this problem either assumed that both lattice type and configuration are known, optimizing instead the cell volume and performing local relaxation. Other approaches assumed that the lattice type is known, searching for the minimum-energy decoration. We present here an approach to the global space-group optimization (GSGO) problem, i.e., the problem of predicting both the lattice structure and the atomic configuration of a crystalline solid. This search method is based on an evolutionary algorithm within which a population of crystal structures is evolved through mating and mutation operations, improving the population by substituting the highest total-energy structures with new ones. The crystal structures are not represented by bit strings as in conventional genetic algorithms. Instead, the evolutionary search is performed directly on the atomic positions and the unit-cell vectors after a similarity transformation is applied to bring structures of different unit-cell shapes to a common basis. Following this transformation, we can define a crossover operation that treats, on the same footing, structures with different unit-cell shapes. Once a new structure has been generated by mating or mutation, it is fully relaxed to the closest local total-energy minimum. We applied our procedure for the GSGO in the context of pseudopotential total-energy calculations to the semiconductor systems Si, SiC, and GaAs and to the metallic alloy AuPd with composition Au8Pd4. Starting from random unit-cell vectors and random atomic positions, the present search procedure found for all semiconductor systems studied the correct lattice structure and configuration. In the case of Au8Pd4, the search retrieved the correct underlying fcc lattice, but energetically closely spaced (similar to 2 meV/at.) alloy configurations were not resolved. This approach to GSGO opens the way to predicting unsuspected structures by direct optimization using, in the cases noted above, an order of 100 total-energy ab initio calculations.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Trimarchi, G (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
RI Zunger, Alex/A-6733-2013; Trimarchi, Giancarlo/A-8225-2010
OI Trimarchi, Giancarlo/0000-0002-0365-3221
NR 48
TC 76
Z9 77
U1 4
U2 27
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104113
DI 10.1103/PhysRevB.75.104113
PG 8
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100023
ER

PT J
AU Uberuaga, BP
   Bacorisen, D
   Smith, R
   Ball, JA
   Grimes, RW
   Voter, AF
   Sickafus, KE
AF Uberuaga, B. P.
   Bacorisen, D.
   Smith, Roger
   Ball, J. A.
   Grimes, R. W.
   Voter, A. F.
   Sickafus, K. E.
TI Defect kinetics in spinels: Long-time simulations of MgAl2O4, MgGa2O4,
   and MgIn2O4
SO PHYSICAL REVIEW B
LA English
DT Article
ID MAGNESIUM ALUMINATE SPINEL; RADIATION-DAMAGE; CATION DISORDER;
   SELF-DIFFUSION; VACANCY DISTRIBUTION; SINGLE-CRYSTALS; MONTE-CARLO;
   HEAVY-IONS; CERAMICS; ENERGY
AB Building upon work in which we examined defect production and stability in spinels, we now turn to defect kinetics. Using temperature accelerated dynamics (TAD), we characterize the kinetics of defects in three spinel oxides: magnesium aluminate MgAl2O4, magnesium gallate MgGa2O4, and magnesium indate MgIn2O4. These materials have varying tendencies to disorder on the cation sublattices. In order to understand chemical composition effects, we first examine defect kinetics in perfectly ordered, or normal, spinels, focusing on point defects on each sublattice. We then examine the role that cation disorder has on defect mobility. Using TAD, we find that disorder creates local environments which strongly trap point defects, effectively reducing their mobility. We explore the consequences of this trapping via kinetic Monte Carlo (KMC) simulations on the oxygen vacancy (V-O) in MgGa2O4, finding that V-O mobility is directly related to the degree of inversion in the system.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Loughborough, Dept Math Sci, Loughborough LE11 3TU, Leics, England.
   Univ London Imperial Coll Sci & Technol, Dept Mat, London SW7 2BP, England.
RP Uberuaga, BP (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RI Smith, Roger/C-2550-2013; 
OI Voter, Arthur/0000-0001-9788-7194
NR 49
TC 29
Z9 29
U1 3
U2 32
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104116
DI 10.1103/PhysRevB.75.104116
PG 13
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100026
ER

PT J
AU Venkataraman, S
   Hermann, H
   Mickel, C
   Schultz, L
   Sordelet, DJ
   Eckert, J
AF Venkataraman, S.
   Hermann, H.
   Mickel, C.
   Schultz, L.
   Sordelet, D. J.
   Eckert, J.
TI Calorimetric study of the crystallization kinetics of Cu47Ti33Zr11Ni8Si1
   metallic glass
SO PHYSICAL REVIEW B
LA English
DT Article
ID AVRAMI EXPONENT; ISOTHERMAL CRYSTALLIZATION; AMORPHOUS-ALLOYS;
   THERMAL-ANALYSIS; FORMING LIQUIDS; PHASE-CHANGE; LOCAL VALUE; BULK;
   NANOCRYSTALLIZATION; MICROSTRUCTURE
AB The isochronal and isothermal activation energies for the primary crystallization process of Cu47Ti33Zr11Ni8Si1 metallic glass powders subjected to varying thermal treatments have been evaluated by differential scanning calorimetry and determined using the Kissinger approach and the Johnson-Mehl-Avrami (JMA) analysis, respectively. The values of the differential Avrami exponent are also determined from the isothermal data. Assuming diffusion-controlled growth, it is shown that thermal treatment of the samples in the supercooled liquid region considerably influences the behavior of the nucleation rate during the crystallization process. Microstructural investigations indicate that the thermal treatment is accompanied by precipitation of fine nanocrystals in an amorphous matrix. The values for the activation energies determined by both the Kissinger approach and the JMA analysis are similar for the as-prepared powder, but a significant difference is found for the thermally treated powders. This discrepancy is explained on the basis of the fundamental assumptions made in the models. It will be shown that the Kissinger method fails if the differential Avrami exponent changes significantly during the transformation process.
C1 Tech Univ Darmstadt, FG Phys Met, FB Mat & Geowissensch 2, D-64287 Darmstadt, Germany.
   Leibniz Inst Festkorper & Werkstofforsch, D-01069 Dresden, Germany.
   Iowa State Univ, Mat & Engn Phys Program, Ames Lab, USDOE, Ames, IA 50014 USA.
RP Venkataraman, S (reprint author), Tech Univ Darmstadt, FG Phys Met, FB Mat & Geowissensch 2, Petersenstr 23, D-64287 Darmstadt, Germany.
EM s.venkataraman@ifw-dresden.de
RI Schultz, Ludwig/B-3383-2010
NR 57
TC 15
Z9 15
U1 1
U2 7
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104206
DI 10.1103/PhysRevB.75.104206
PG 9
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100035
ER

PT J
AU Wehling, TO
   Balatsky, AV
   Katsnelson, MI
   Lichtenstein, AI
   Scharnberg, K
   Wiesendanger, R
AF Wehling, T. O.
   Balatsky, A. V.
   Katsnelson, M. I.
   Lichtenstein, A. I.
   Scharnberg, K.
   Wiesendanger, R.
TI Local electronic signatures of impurity states in graphene
SO PHYSICAL REVIEW B
LA English
DT Article
ID BI2SR2CACU2O8+DELTA; SUPERCONDUCTIVITY; GRAPHITE; ATOMS
AB Defects in graphene are of crucial importance for its electronic and magnetic properties. Here, impurity effects on the electronic structure of surrounding carbon atoms are considered and the distribution of the local densities of states is calculated. As the full range from near field to the asymptotic regime is covered, our results are directly accessible by scanning tunneling microscopy. We also include exchange scattering at magnetic impurities and elucidate how strongly spin-polarized impurity states arise.
C1 Univ Hamburg, Inst Theoret Phys, D-20355 Hamburg, Germany.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands.
   Univ Hamburg, Inst Angewandte Phys 1, D-20355 Hamburg, Germany.
RP Wehling, TO (reprint author), Univ Hamburg, Inst Theoret Phys, Jungiusstr 9, D-20355 Hamburg, Germany.
EM avb@lanl.gov
RI Katsnelson, Mikhail/D-4359-2012; Wehling, Tim/O-4642-2014; Lichtenstein,
   Alexander/K-8730-2012; Wiesendanger, Roland/P-9726-2016
OI Wehling, Tim/0000-0002-5579-2231; Lichtenstein,
   Alexander/0000-0003-0152-7122; Wiesendanger, Roland/0000-0002-0472-4183
NR 33
TC 149
Z9 150
U1 4
U2 40
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 12
AR 125425
DI 10.1103/PhysRevB.75.125425
PG 5
WC Physics, Condensed Matter
SC Physics
GA 151ZQ
UT WOS:000245330200102
ER

PT J
AU Yu, R
   Zhang, XF
   De Jonghe, LC
   Ritchie, RO
AF Yu, R.
   Zhang, X. F.
   De Jonghe, L. C.
   Ritchie, R. O.
TI Elastic constants and tensile properties of Al2OC by density functional
   calculations
SO PHYSICAL REVIEW B
LA English
DT Article
ID BRILLOUIN-ZONE INTEGRATIONS; TOUGHENED SILICON-CARBIDE; B-C ADDITIONS;
   ALUMINUM OXYCARBIDE; PSEUDOBINARY SYSTEM; CYCLIC FATIGUE; STRENGTH;
   BEHAVIOR; NITRIDE; TOUGHNESS
AB Al2OC is a compound that forms as a nanoscale grain-boundary crystalline film in silicon carbide ceramics, and is responsible for imparting high low-temperature toughness and high-temperature creep strength in these materials. The elastic properties and ultimate strengths properties of Al2OC are determined from first-principles calculations. The crystal structure of Al2OC was approximated by an optimized model based on the wurtzite structure. The full set of single-crystal elastic stiffness c(ij) was calculated, from which the polycrystalline elastic constants were obtained by using the Voigt-Reuss-Hill averaging scheme. The tensile properties and the ideal strength in [001] direction of Al2OC were also computed and compared to those of SiC, where it was found that indeed, Al2OC is the weaker and more brittle phase, supporting fracture mechanics expectations for SiC containing Al2OC-type intergranular films.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA.
RP Yu, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
EM ryu@lbl.gov
RI Yu, Rong/A-3011-2008; Ritchie, Robert/A-8066-2008
OI Yu, Rong/0000-0003-1687-3597; Ritchie, Robert/0000-0002-0501-6998
NR 34
TC 8
Z9 8
U1 2
U2 15
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
EI 1550-235X
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104114
DI 10.1103/PhysRevB.75.104114
PG 5
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100024
ER

PT J
AU Zheludev, A
   Garlea, VO
   Nishihara, S
   Hosokoshi, Y
   Cousson, A
   Gukasov, A
   Inoue, K
AF Zheludev, A.
   Garlea, V. O.
   Nishihara, S.
   Hosokoshi, Y.
   Cousson, A.
   Gukasov, A.
   Inoue, K.
TI Spin-density distribution in the partially magnetized organic quantum
   magnet F2PNNNO
SO PHYSICAL REVIEW B
LA English
DT Article
ID NITRONYL NITROXIDE; COUPLINGS; RADICALS
AB Polarized neutron diffraction experiments on an organic magnetic material reveal a highly skewed distribution of spin density within the magnetic molecular unit. The very large magnitude of the observed effect is due to quantum spin fluctuations. The data are in quantitative agreement with direct diagonalization results for a model spin Hamiltonian, and provide insight on the actual microscopic origin of the relevant exchange interactions.
C1 Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
   Osaka Prefecture Univ, Dept Phys Sci, Osaka 5998531, Japan.
   Osaka Prefecture Univ, Inst Nanofabricat Res, Osaka 5998531, Japan.
   CEA Saclay, CNRS, Leon Brillouin Lab, Gif Sur Yvette, France.
   Hiroshima Univ, Dept Chem, Hiroshima 7398526, Japan.
RP Zheludev, A (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
EM zheludevai@ornl.gov
RI Garlea, Vasile/A-4994-2016; INOUE, Katsuya/E-9221-2010; Nishihara,
   Sadafumi/Q-2500-2016
OI Garlea, Vasile/0000-0002-5322-7271; Nishihara,
   Sadafumi/0000-0003-4030-786X
NR 11
TC 3
Z9 3
U1 1
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-0121
J9 PHYS REV B
JI Phys. Rev. B
PD MAR
PY 2007
VL 75
IS 10
AR 104427
DI 10.1103/PhysRevB.75.104427
PG 4
WC Physics, Condensed Matter
SC Physics
GA 151ZF
UT WOS:000245329100072
ER

PT J
AU Adams, J
   Aggarwal, MM
   Ahammed, Z
   Amonett, J
   Anderson, BD
   Anderson, M
   Arkhipkin, D
   Averichev, GS
   Bai, Y
   Balewski, J
   Barannikova, O
   Barnby, LS
   Baudot, J
   Bekele, S
   Belaga, VV
   Bellingeri-Laurikainen, A
   Bellwied, R
   Bezverkhny, BI
   Bharadwaj, S
   Bhasin, A
   Bhati, AK
   Bichsel, H
   Bielcik, J
   Bielcikova, J
   Bland, LC
   Blyth, CO
   Blyth, SL
   Bonner, BE
   Botje, M
   Bouchet, J
   Brandin, AV
   Bravar, A
   Bystersky, M
   Cadman, RV
   Cai, XZ
   Caines, H
   Sanchez, MCDB
   Castillo, J
   Catu, O
   Cebra, D
   Chajecki, Z
   Chaloupka, P
   Chattopadhyay, S
   Chen, HF
   Chen, JH
   Chen, Y
   Cheng, J
   Cherney, M
   Chikanian, A
   Choi, HA
   Christie, W
   Coffin, JP
   Cormier, TM
   Cosentino, MR
   Cramer, JG
   Crawford, HJ
   Das, D
   Das, S
   Daugherity, M
   de Moura, MM
   Dedovich, TG
   DePhillips, M
   Derevschikov, AA
   Didenko, L
   Dietel, T
   Djawotho, P
   Dogra, SM
   Dong, WJ
   Dong, X
   Draper, JE
   Du, F
   Dunin, VB
   Dunlop, JC
   Mazumdar, MRD
   Eckardt, V
   Edwards, WR
   Efimov, LG
   Emelianov, V
   Engelage, J
   Eppley, G
   Erazmus, B
   Estienne, M
   Fachini, P
   Fatemi, R
   Fedorisin, J
   Filimonov, K
   Filip, P
   Finch, E
   Fine, V
   Fisyak, Y
   Fu, J
   Gagliardi, CA
   Gaillard, L
   Gans, J
   Ganti, MS
   Ghazikhanian, V
   Ghosh, P
   Gonzalez, JE
   Gorbunov, YG
   Gos, H
   Grebenyuk, O
   Grosnick, D
   Guertin, SM
   Guimaraes, KSFF
   Guo, Y
   Gupta, N
   Gutierrez, TD
   Haag, B
   Hallman, TJ
   Hamed, A
   Harris, JW
   He, W
   Heinz, M
   Henry, TW
   Hepplemann, S
   Hippolyte, B
   Hirsch, A
   Hjort, E
   Hoffmann, GW
   Horner, MJ
   Huang, HZ
   Huang, SL
   Hughes, EW
   Humanic, TJ
   Igo, G
   Jacobs, P
   Jacobs, WW
   Jakl, P
   Jia, F
   Jiang, H
   Jones, PG
   Judd, EG
   Kabana, S
   Kang, K
   Kapitan, J
   Kaplan, M
   Keane, D
   Kechechyan, A
   Khodyrev, VY
   Kim, BC
   Kiryluk, J
   Kisiel, A
   Kislov, EM
   Klein, SR
   Koetke, DD
   Kollegger, T
   Kopytine, M
   Kotchenda, L
   Kouchpil, V
   Kowalik, KL
   Kramer, M
   Kravtsov, P
   Kravtsov, VI
   Krueger, K
   Kuhn, C
   Kulikov, AI
   Kumar, A
   Kuznetsov, AA
   Lamont, MAC
   Landgraf, JM
   Lange, S
   LaPointe, S
   Laue, F
   Lauret, J
   Lebedev, A
   Lednicky, R
   Lee, CH
   Lehocka, S
   LeVine, MJ
   Li, C
   Li, Q
   Li, Y
   Lin, G
   Lindenbaum, SJ
   Lisa, MA
   Liu, F
   Liu, H
   Liu, J
   Liu, L
   Liu, Z
   Ljubicic, T
   Llope, WJ
   Long, H
   Longacre, RS
   Lopez-Noriega, M
   Love, WA
   Lu, Y
   Ludlam, T
   Lynn, D
   Ma, GL
   Ma, JG
   Ma, YG
   Magestro, D
   Mahapatra, DP
   Majka, R
   Mangotra, LK
   Manweiler, R
   Margetis, S
   Markert, C
   Martin, L
   Matis, HS
   Matulenko, YA
   McClain, CJ
   McShane, TS
   Melnick, Y
   Meschanin, A
   Miller, ML
   Minaev, NG
   Mioduszewski, S
   Mironov, C
   Mischke, A
   Mishra, DK
   Mitchell, J
   Mohanty, B
   Molnar, L
   Moore, CF
   Morozov, DA
   Munhoz, MG
   Nandi, BK
   Nattrass, C
   Nayak, TK
   Nelson, JM
   Netrakanti, PK
   Nikitin, VA
   Nogach, LV
   Nurushev, SB
   Odyniec, G
   Ogawa, A
   Okorokov, V
   Oldenburg, M
   Olson, D
   Pachr, M
   Pal, SK
   Panebratsev, Y
   Panitkin, SY
   Pavlinov, AI
   Pawlak, T
   Peitzmann, T
   Perevoztchikov, V
   Perkins, C
   Peryt, W
   Petrov, VA
   Phatak, SC
   Picha, R
   Planinic, M
   Pluta, J
   Poljak, N
   Porile, N
   Porter, J
   Poskanzer, AM
   Potekhin, M
   Potrebenikova, E
   Potukuchi, BVKS
   Prindle, D
   Pruneau, C
   Putschke, J
   Rakness, G
   Raniwala, R
   Raniwala, S
   Ray, RL
   Razin, SV
   Reinnarth, J
   Relyea, D
   Retiere, F
   Ridiger, A
   Ritter, HG
   Roberts, JB
   Rogachevskiy, OV
   Romero, JL
   Rose, A
   Roy, C
   Ruan, L
   Russcher, MJ
   Sahoo, R
   Sakrejda, I
   Salur, S
   Sandweiss, J
   Sarsour, M
   Sazhin, PS
   Schambach, J
   Scharenberg, RP
   Schmitz, N
   Schweda, K
   Seger, J
   Selyuzhenkov, I
   Seyboth, P
   Shabetai, A
   Shahaliev, E
   Shao, M
   Sharma, M
   Shen, WQ
   Shimanskiy, SS
   Sichtermann, E
   Simon, F
   Singaraju, RN
   Smirnov, N
   Snellings, R
   Sood, G
   Sorensen, P
   Sowinski, J
   Speltz, J
   Spinka, HM
   Srivastava, B
   Stadnik, A
   Stanislaus, TDS
   Stock, R
   Stolpovsky, A
   Strikhanov, M
   Stringfellow, B
   Suaide, AAP
   Sugarbaker, E
   Sumbera, M
   Sun, Z
   Surrow, B
   Swanger, M
   Symons, TJM
   de Toledo, AS
   Takahashi, ATJ
   Tang, AH
   Tarnowsky, T
   Thein, D
   Thomas, JH
   Timmins, AR
   Timoshenko, S
   Tokarev, M
   Trentalange, S
   Tribble, RE
   Tsai, OD
   Ulery, J
   Ullrich, T
   Underwood, DG
   Van Buren, G
   van der Kolk, N
   van Leeuwen, M
   Molen, AMV
   Varma, R
   Vasilevski, IM
   Vasiliev, AN
   Vernet, R
   Vigdor, SE
   Viyogi, YP
   Vokal, S
   Voloshin, SA
   Waggoner, WT
   Wang, F
   Wang, G
   Wang, JS
   Wang, XL
   Wang, Y
   Watson, JW
   Webb, JC
   Westfall, GD
   Wetzler, A
   Whitten, C
   Wieman, H
   Wissink, SW
   Witt, R
   Wood, J
   Wu, J
   Xu, N
   Xu, QH
   Xu, Z
   Yepes, P
   Yoo, IK
   Yurevich, VI
   Zhan, W
   Zhang, H
   Zhang, WM
   Zhang, Y
   Zhang, ZP
   Zhao, Y
   Zhong, C
   Zoulkarneev, R
   Zoulkarneeva, Y
   Zubarev, AN
   Zuo, JX
AF Adams, J.
   Aggarwal, M. M.
   Ahammed, Z.
   Amonett, J.
   Anderson, B. D.
   Anderson, M.
   Arkhipkin, D.
   Averichev, G. S.
   Bai, Y.
   Balewski, J.
   Barannikova, O.
   Barnby, L. S.
   Baudot, J.
   Bekele, S.
   Belaga, V. V.
   Bellingeri-Laurikainen, A.
   Bellwied, R.
   Bezverkhny, B. I.
   Bharadwaj, S.
   Bhasin, A.
   Bhati, A. K.
   Bichsel, H.
   Bielcik, J.
   Bielcikova, J.
   Bland, L. C.
   Blyth, C. O.
   Blyth, S. -L.
   Bonner, B. E.
   Botje, M.
   Bouchet, J.
   Brandin, A. V.
   Bravar, A.
   Bystersky, M.
   Cadman, R. V.
   Cai, X. Z.
   Caines, H.
   Sanchez, M. Calderon de la Barca
   Castillo, J.
   Catu, O.
   Cebra, D.
   Chajecki, Z.
   Chaloupka, P.
   Chattopadhyay, S.
   Chen, H. F.
   Chen, J. H.
   Chen, Y.
   Cheng, J.
   Cherney, M.
   Chikanian, A.
   Choi, H. A.
   Christie, W.
   Coffin, J. P.
   Cormier, T. M.
   Cosentino, M. R.
   Cramer, J. G.
   Crawford, H. J.
   Das, D.
   Das, S.
   Daugherity, M.
   de Moura, M. M.
   Dedovich, T. G.
   DePhillips, M.
   Derevschikov, A. A.
   Didenko, L.
   Dietel, T.
   Djawotho, P.
   Dogra, S. M.
   Dong, W. J.
   Dong, X.
   Draper, J. E.
   Du, F.
   Dunin, V. B.
   Dunlop, J. C.
   Mazumdar, M. R. Dutta
   Eckardt, V.
   Edwards, W. R.
   Efimov, L. G.
   Emelianov, V.
   Engelage, J.
   Eppley, G.
   Erazmus, B.
   Estienne, M.
   Fachini, P.
   Fatemi, R.
   Fedorisin, J.
   Filimonov, K.
   Filip, P.
   Finch, E.
   Fine, V.
   Fisyak, Y.
   Fu, J.
   Gagliardi, C. A.
   Gaillard, L.
   Gans, J.
   Ganti, M. S.
   Ghazikhanian, V.
   Ghosh, P.
   Gonzalez, J. E.
   Gorbunov, Y. G.
   Gos, H.
   Grebenyuk, O.
   Grosnick, D.
   Guertin, S. M.
   Guimaraes, K. S. F. F.
   Guo, Y.
   Gupta, N.
   Gutierrez, T. D.
   Haag, B.
   Hallman, T. J.
   Hamed, A.
   Harris, J. W.
   He, W.
   Heinz, M.
   Henry, T. W.
   Hepplemann, S.
   Hippolyte, B.
   Hirsch, A.
   Hjort, E.
   Hoffmann, G. W.
   Horner, M. J.
   Huang, H. Z.
   Huang, S. L.
   Hughes, E. W.
   Humanic, T. J.
   Igo, G.
   Jacobs, P.
   Jacobs, W. W.
   Jakl, P.
   Jia, F.
   Jiang, H.
   Jones, P. G.
   Judd, E. G.
   Kabana, S.
   Kang, K.
   Kapitan, J.
   Kaplan, M.
   Keane, D.
   Kechechyan, A.
   Khodyrev, V. Yu.
   Kim, B. C.
   Kiryluk, J.
   Kisiel, A.
   Kislov, E. M.
   Klein, S. R.
   Koetke, D. D.
   Kollegger, T.
   Kopytine, M.
   Kotchenda, L.
   Kouchpil, V.
   Kowalik, K. L.
   Kramer, M.
   Kravtsov, P.
   Kravtsov, V. I.
   Krueger, K.
   Kuhn, C.
   Kulikov, A. I.
   Kumar, A.
   Kuznetsov, A. A.
   Lamont, M. A. C.
   Landgraf, J. M.
   Lange, S.
   LaPointe, S.
   Laue, F.
   Lauret, J.
   Lebedev, A.
   Lednicky, R.
   Lee, C. -H.
   Lehocka, S.
   LeVine, M. J.
   Li, C.
   Li, Q.
   Li, Y.
   Lin, G.
   Lindenbaum, S. J.
   Lisa, M. A.
   Liu, F.
   Liu, H.
   Liu, J.
   Liu, L.
   Liu, Z.
   Ljubicic, T.
   Llope, W. J.
   Long, H.
   Longacre, R. S.
   Lopez-Noriega, M.
   Love, W. A.
   Lu, Y.
   Ludlam, T.
   Lynn, D.
   Ma, G. L.
   Ma, J. G.
   Ma, Y. G.
   Magestro, D.
   Mahapatra, D. P.
   Majka, R.
   Mangotra, L. K.
   Manweiler, R.
   Margetis, S.
   Markert, C.
   Martin, L.
   Matis, H. S.
   Matulenko, Yu. A.
   McClain, C. J.
   McShane, T. S.
   Melnick, Yu.
   Meschanin, A.
   Miller, M. L.
   Minaev, N. G.
   Mioduszewski, S.
   Mironov, C.
   Mischke, A.
   Mishra, D. K.
   Mitchell, J.
   Mohanty, B.
   Molnar, L.
   Moore, C. F.
   Morozov, D. A.
   Munhoz, M. G.
   Nandi, B. K.
   Nattrass, C.
   Nayak, T. K.
   Nelson, J. M.
   Netrakanti, P. K.
   Nikitin, V. A.
   Nogach, L. V.
   Nurushev, S. B.
   Odyniec, G.
   Ogawa, A.
   Okorokov, V.
   Oldenburg, M.
   Olson, D.
   Pachr, M.
   Pal, S. K.
   Panebratsev, Y.
   Panitkin, S. Y.
   Pavlinov, A. I.
   Pawlak, T.
   Peitzmann, T.
   Perevoztchikov, V.
   Perkins, C.
   Peryt, W.
   Petrov, V. A.
   Phatak, S. C.
   Picha, R.
   Planinic, M.
   Pluta, J.
   Poljak, N.
   Porile, N.
   Porter, J.
   Poskanzer, A. M.
   Potekhin, M.
   Potrebenikova, E.
   Potukuchi, B. V. K. S.
   Prindle, D.
   Pruneau, C.
   Putschke, J.
   Rakness, G.
   Raniwala, R.
   Raniwala, S.
   Ray, R. L.
   Razin, S. V.
   Reinnarth, J.
   Relyea, D.
   Retiere, F.
   Ridiger, A.
   Ritter, H. G.
   Roberts, J. B.
   Rogachevskiy, O. V.
   Romero, J. L.
   Rose, A.
   Roy, C.
   Ruan, L.
   Russcher, M. J.
   Sahoo, R.
   Sakrejda, I.
   Salur, S.
   Sandweiss, J.
   Sarsour, M.
   Sazhin, P. S.
   Schambach, J.
   Scharenberg, R. P.
   Schmitz, N.
   Schweda, K.
   Seger, J.
   Selyuzhenkov, I.
   Seyboth, P.
   Shabetai, A.
   Shahaliev, E.
   Shao, M.
   Sharma, M.
   Shen, W. Q.
   Shimanskiy, S. S.
   Sichtermann, E.
   Simon, F.
   Singaraju, R. N.
   Smirnov, N.
   Snellings, R.
   Sood, G.
   Sorensen, P.
   Sowinski, J.
   Speltz, J.
   Spinka, H. M.
   Srivastava, B.
   Stadnik, A.
   Stanislaus, T. D. S.
   Stock, R.
   Stolpovsky, A.
   Strikhanov, M.
   Stringfellow, B.
   Suaide, A. A. P.
   Sugarbaker, E.
   Sumbera, M.
   Sun, Z.
   Surrow, B.
   Swanger, M.
   Symons, T. J. M.
   de Toledo, A. Szanto
   Takahashi, A. Tai J.
   Tang, A. H.
   Tarnowsky, T.
   Thein, D.
   Thomas, J. H.
   Timmins, A. R.
   Timoshenko, S.
   Tokarev, M.
   Trentalange, S.
   Tribble, R. E.
   Tsai, O. D.
   Ulery, J.
   Ullrich, T.
   Underwood, D. G.
   Van Buren, G.
   van der Kolk, N.
   van Leeuwen, M.
   Molen, A. M. Vander
   Varma, R.
   Vasilevski, I. M.
   Vasiliev, A. N.
   Vernet, R.
   Vigdor, S. E.
   Viyogi, Y. P.
   Vokal, S.
   Voloshin, S. A.
   Waggoner, W. T.
   Wang, F.
   Wang, G.
   Wang, J. S.
   Wang, X. L.
   Wang, Y.
   Watson, J. W.
   Webb, J. C.
   Westfall, G. D.
   Wetzler, A.
   Whitten, C., Jr.
   Wieman, H.
   Wissink, S. W.
   Witt, R.
   Wood, J.
   Wu, J.
   Xu, N.
   Xu, Q. H.
   Xu, Z.
   Yepes, P.
   Yoo, I. -K.
   Yurevich, V. I.
   Zhan, W.
   Zhang, H.
   Zhang, W. M.
   Zhang, Y.
   Zhang, Z. P.
   Zhao, Y.
   Zhong, C.
   Zoulkarneev, R.
   Zoulkarneeva, Y.
   Zubarev, A. N.
   Zuo, J. X.
CA STAR Collaboration
TI Delta phi Delta eta correlations in central Au plus Au collisions at
   root S-NN = 200 GeV
SO PHYSICAL REVIEW C
LA English
DT Article
ID QUARK-GLUON PLASMA; ANGULAR-CORRELATIONS; HADRONIZATION; MODEL; RHIC/LHC
AB We report charged particle pair correlation analyses in the space of Delta phi (azimuth) and Delta eta (pseudorapidity), for central Au+Au collisions at root s(NN)=200 GeV in the STAR detector. The analysis involves unlike-sign charged pairs and like-sign charged pairs, which are transformed into charge-dependent (CD) signals and charge-independent (CI) signals. We present detailed parametrizations of the data. A model featuring dense gluonic hot spots as first proposed by Van Hove predicts that the observables under investigation would have sensitivity to such a substructure should it occur, and the model also motivates selection of transverse momenta in the range 0.8 < p(t)< 2.0 GeV/c. Both CD and CI correlations of high statistical significance are observed, and possible interpretations are discussed.
C1 Univ Birmingham, Birmingham, W Midlands, England.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
   CALTECH, Pasadena, CA 91125 USA.
   Univ Calif Berkeley, Berkeley, CA 94720 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   Creighton Univ, Omaha, NE 68178 USA.
   Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic.
   JINR, Lab High Energy, Dubna, Russia.
   JINR, Particle Phys Lab, Dubna, Russia.
   Goethe Univ Frankfurt, D-6000 Frankfurt, Germany.
   Inst Phys, Bhubaneswar 751005, Orissa, India.
   Indian Inst Technol, Bombay 400076, Maharashtra, India.
   Indiana Univ, Bloomington, IN 47408 USA.
   Inst Rech Subatom, Strasbourg, France.
   Univ Jammu, Jammu 180001, India.
   Kent State Univ, Kent, OH 44242 USA.
   Inst Modern Phys, Lanzhou, Peoples R China.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   MIT, Cambridge, MA 02139 USA.
   Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
   Michigan State Univ, E Lansing, MI 48824 USA.
   Moscow Engn Phys Inst, Moscow 115409, Russia.
   CUNY City Coll, New York, NY 10031 USA.
   NIKHEF H, NL-1009 DB Amsterdam, Netherlands.
   Univ Utrecht, Utrecht, Netherlands.
   Ohio State Univ, Columbus, OH 43210 USA.
   Panjab Univ, Chandigarh 160014, India.
   Penn State Univ, University Pk, PA 16802 USA.
   Inst High Energy Phys, Protvino, Russia.
   Purdue Univ, W Lafayette, IN 47907 USA.
   Pusan Natl Univ, Pusan 609735, South Korea.
   Univ Rajasthan, Jaipur 302004, Rajasthan, India.
   Rice Univ, Houston, TX 77251 USA.
   Univ Sao Paulo, Sao Paulo, Brazil.
   Univ Sci & Technol China, Hefei 230026, Peoples R China.
   Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
   SUBATECH, Nantes, France.
   Texas A&M Univ, College Stn, TX 77843 USA.
   Univ Texas, Austin, TX 78712 USA.
   Tsinghua Univ, Beijing 100084, Peoples R China.
   Valparaiso Univ, Valparaiso, IN 46383 USA.
   Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India.
   Warsaw Univ Technol, Warsaw, Poland.
   Univ Washington, Seattle, WA 98195 USA.
   Wayne State Univ, Detroit, MI 48201 USA.
   HZNU, CCNU, Inst Particle Phys, Wuhan 430079, Peoples R China.
   Yale Univ, New Haven, CT 06520 USA.
   Univ Zagreb, HR-10002 Zagreb, Croatia.
RP Adams, J (reprint author), Univ Birmingham, Birmingham, W Midlands, England.
RI Sumbera, Michal/O-7497-2014; Strikhanov, Mikhail/P-7393-2014; Dogra,
   Sunil /B-5330-2013; Barnby, Lee/G-2135-2010; Mischke, Andre/D-3614-2011;
   Chen, Yu/E-3788-2012; Planinic, Mirko/E-8085-2012; Peitzmann,
   Thomas/K-2206-2012; Witt, Richard/H-3560-2012; Castillo Castellanos,
   Javier/G-8915-2013; Voloshin, Sergei/I-4122-2013; Lednicky,
   Richard/K-4164-2013; Cosentino, Mauro/L-2418-2014; Fornazier Guimaraes,
   Karin Silvia/H-4587-2016; Chaloupka, Petr/E-5965-2012; Nattrass,
   Christine/J-6752-2016; Suaide, Alexandre/L-6239-2016; van der Kolk,
   Naomi/M-9423-2016; Okorokov, Vitaly/C-4800-2017; Ma, Yu-Gang/M-8122-2013
OI Sumbera, Michal/0000-0002-0639-7323; Strikhanov,
   Mikhail/0000-0003-2586-0405; Barnby, Lee/0000-0001-7357-9904; Peitzmann,
   Thomas/0000-0002-7116-899X; Castillo Castellanos,
   Javier/0000-0002-5187-2779; Cosentino, Mauro/0000-0002-7880-8611;
   Fornazier Guimaraes, Karin Silvia/0000-0003-0578-9533; Nattrass,
   Christine/0000-0002-8768-6468; Suaide, Alexandre/0000-0003-2847-6556;
   van der Kolk, Naomi/0000-0002-8670-0408; Okorokov,
   Vitaly/0000-0002-7162-5345; Ma, Yu-Gang/0000-0002-0233-9900
NR 27
TC 43
Z9 43
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034901
DI 10.1103/PhysRevC.75.034901
PG 14
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200047
ER

PT J
AU Anderson, B
   Auberbach, L
   Averett, T
   Bertozzi, W
   Black, T
   Calarco, J
   Cardman, L
   Cates, GD
   Chai, ZW
   Chen, JP
   Choi, S
   Chudakov, E
   Churchwell, S
   Corrado, GS
   Crawford, C
   Dale, D
   Deur, A
   Djawotho, P
   Dutta, D
   Finn, JM
   Gao, H
   Gilman, R
   Glamazdin, AV
   Glashausser, C
   Glockle, W
   Golak, J
   Gomez, J
   Gorbenko, VG
   Hansen, JO
   Hersman, FW
   Higinbotham, DW
   Holmes, R
   Howell, CR
   Hughes, E
   Humensky, B
   Incerti, S
   de Jager, CW
   Jensen, JS
   Jiang, X
   Jones, CE
   Jones, M
   Kahl, R
   Kamada, H
   Kievsky, A
   Kominis, I
   Korsch, W
   Kramer, K
   Kumbartzki, G
   Kuss, M
   Lakuriqi, E
   Liang, M
   Liyanage, N
   LeRose, J
   Malov, S
   Margaziotis, DJ
   Martin, JW
   McCormick, K
   McKeown, RD
   McIlhany, K
   Meziani, ZE
   Michaels, R
   Miller, GW
   Mitchell, J
   Nanda, S
   Pace, E
   Pavlin, T
   Petratos, GG
   Pomatsalyuk, RI
   Pripstein, D
   Prout, D
   Ransome, RD
   Roblin, Y
   Rvachev, M
   Saha, A
   Salme, G
   Schnee, M
   Seely, J
   Shin, T
   Slifer, K
   Souder, PA
   Strauch, S
   Suleiman, R
   Sutter, M
   Tipton, B
   Todor, L
   Viviani, M
   Vlahovic, B
   Watson, J
   Williamson, CF
   Witala, H
   Wojtsekhowski, B
   Xiong, F
   Xu, W
   Yeh, J
   Zolnierczuk, P
AF Anderson, B.
   Auberbach, L.
   Averett, T.
   Bertozzi, W.
   Black, T.
   Calarco, J.
   Cardman, L.
   Cates, G. D.
   Chai, Z. W.
   Chen, J. P.
   Choi, Seonho
   Chudakov, E.
   Churchwell, S.
   Corrado, G. S.
   Crawford, C.
   Dale, D.
   Deur, A.
   Djawotho, P.
   Dutta, D.
   Finn, J. M.
   Gao, H.
   Gilman, R.
   Glamazdin, A. V.
   Glashausser, C.
   Gloeckle, W.
   Golak, J.
   Gomez, J.
   Gorbenko, V. G.
   Hansen, J. -O.
   Hersman, F. W.
   Higinbotham, D. W.
   Holmes, R.
   Howell, C. R.
   Hughes, E.
   Humensky, B.
   Incerti, S.
   de Jager, C. W.
   Jensen, J. S.
   Jiang, X.
   Jones, C. E.
   Jones, M.
   Kahl, R.
   Kamada, H.
   Kievsky, A.
   Kominis, I.
   Korsch, W.
   Kramer, K.
   Kumbartzki, G.
   Kuss, M.
   Lakuriqi, E.
   Liang, M.
   Liyanage, N.
   LeRose, J.
   Malov, S.
   Margaziotis, D. J.
   Martin, J. W.
   McCormick, K.
   McKeown, R. D.
   McIlhany, K.
   Meziani, Z. -E.
   Michaels, R.
   Miller, G. W.
   Mitchell, J.
   Nanda, S.
   Pace, E.
   Pavlin, T.
   Petratos, G. G.
   Pomatsalyuk, R. I.
   Pripstein, D.
   Prout, D.
   Ransome, R. D.
   Roblin, Y.
   Rvachev, M.
   Saha, A.
   Salme, G.
   Schnee, M.
   Seely, J.
   Shin, T.
   Slifer, K.
   Souder, P. A.
   Strauch, S.
   Suleiman, R.
   Sutter, M.
   Tipton, B.
   Todor, L.
   Viviani, M.
   Vlahovic, B.
   Watson, J.
   Williamson, C. F.
   Witala, H.
   Wojtsekhowski, B.
   Xiong, F.
   Xu, W.
   Yeh, J.
   Zolnierczuk, P.
TI Extraction of the neutron magnetic form factor from quasielastic
   (3)(H)over-right-arrow((e)over-right-arrow,e(')) at Q(2)=0.1-0.6
   (GeV/c)(2)
SO PHYSICAL REVIEW C
LA English
DT Article
ID DEEP-INELASTIC SCATTERING; FINAL-STATE INTERACTIONS; NUCLEON
   CROSS-SECTIONS; POLARIZED ELECTRONS; INCLUSIVE SCATTERING; TRANSVERSE
   ASYMMETRY; EXCHANGE CURRENTS; FULL INCLUSION; HE-3; TARGETS
AB We have measured the transverse asymmetry A(T)(') in the quasielastic He-3(e,e(')) process with high precision at Q(2) values from 0.1 to 0.6 (GeV/c)(2). The neutron magnetic form factor G(M)(n) was extracted at Q(2) values of 0.1 and 0.2 (GeV/c)(2) using a nonrelativistic Faddeev calculation which includes both final-state interactions (FSI) and meson-exchange currents (MEC). Theoretical uncertainties due to the FSI and MEC effects were constrained with a precision measurement of the spin-dependent asymmetry in the threshold region of He-3(e,e(')). We also extracted the neutron magnetic form factor G(M)(n) at Q(2) values of 0.3 to 0.6 (GeV/c)(2) based on plane wave impulse approximation calculations.
C1 Kent State Univ, Kent, OH 44242 USA.
   CALTECH, Pasadena, CA 91125 USA.
   Calif State Univ Los Angeles, Los Angeles, CA 90032 USA.
   Coll William & Mary, Williamsburg, VA 23187 USA.
   Duke Univ, Durham, NC 27708 USA.
   Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa, Italy.
   Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.
   Univ Roma Tor Vergata, I-00133 Rome, Italy.
   Jagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, Poland.
   Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine.
   MIT, Cambridge, MA 02139 USA.
   N Carolina Cent Univ, Durham, NC 27707 USA.
   Old Dominion Univ, Norfolk, VA 23508 USA.
   Princeton Univ, Princeton, NJ 08544 USA.
   Ruhr Univ Bochum, D-44780 Bochum, Germany.
   Rutgers State Univ, Piscataway, NJ 08855 USA.
   Syracuse Univ, Syracuse, NY 13244 USA.
   Temple Univ, Philadelphia, PA 19122 USA.
   Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   Univ Clermont Ferrand, IN2P3, F-63177 Clermont Ferrand, France.
   Univ Kentucky, Lexington, KY 40506 USA.
   Univ New Hampshire, Durham, NH 03824 USA.
   Univ Virginia, Charlottesville, VA 22903 USA.
RP Hansen, JO (reprint author), Kent State Univ, Kent, OH 44242 USA.
EM ole@jlab.org
RI kievsky, alejandro/A-7123-2011; Kominis, Iannis/C-5515-2011; Averett,
   Todd/A-2969-2011; Gao, Haiyan/G-2589-2011; Kuss, Michael/H-8959-2012;
   Higinbotham, Douglas/J-9394-2014
OI Higinbotham, Douglas/0000-0003-2758-6526
NR 78
TC 39
Z9 40
U1 1
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034003
DI 10.1103/PhysRevC.75.034003
PG 15
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200009
ER

PT J
AU Arsene, IC
   Bravina, LV
   Cassing, W
   Ivanov, YB
   Larionov, A
   Randrup, J
   Russkikh, VN
   Toneev, VD
   Zeeb, G
   Zschiesche, D
AF Arsene, I. C.
   Bravina, L. V.
   Cassing, W.
   Ivanov, Yu. B.
   Larionov, A.
   Randrup, J.
   Russkikh, V. N.
   Toneev, V. D.
   Zeeb, G.
   Zschiesche, D.
TI Dynamical phase trajectories for relativistic nuclear collisions
SO PHYSICAL REVIEW C
LA English
DT Article
ID HEAVY-ION COLLISIONS; QUARK-GLUON STRINGS; AGS ENERGIES; MODEL; FLOW;
   QCD; PROTON; MATTER; SIS
AB Central collisions of gold nuclei are simulated by several existing models and the central net baryon density rho and the energy density epsilon are extracted at successive times for beam kinetic energies of 5-40 GeV/nucleon. The resulting trajectories in the (rho,epsilon) phase plane are discussed from the perspective of experimentally exploring the expected first-order hadronization phase transition with the planned FAIR at GSI or in a low-energy campaign at the Relativistic Heavy Ion Collider.
C1 Univ Oslo, Inst Fys, N-0316 Oslo, Norway.
   Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany.
   IV Kurchatov Atom Energy Inst, RU-123182 Moscow, Russia.
   Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   Joint Inst Nucl Res, RU-141980 Dubna, Russia.
   Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany.
   Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, Brazil.
RP Arsene, IC (reprint author), Univ Oslo, Inst Fys, N-0316 Oslo, Norway.
RI Ivanov, Yuri/I-4319-2014
NR 52
TC 53
Z9 55
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034902
DI 10.1103/PhysRevC.75.034902
PG 11
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200048
ER

PT J
AU Bosted, PE
   Dharmawardane, KV
   Dodge, GE
   Forest, TA
   Kuhn, SE
   Prok, Y
   Adams, G
   Amarian, M
   Ambrozewicz, P
   Anghinolfi, M
   Asryan, G
   Avakian, H
   Bagdasaryan, H
   Baillie, N
   Ball, JP
   Baltzell, NA
   Barrow, S
   Batourine, V
   Battaglieri, M
   Beard, K
   Bedlinskiy, I
   Bektasoglu, M
   Bellis, M
   Benmouna, N
   Biselli, AS
   Bonner, BE
   Bouchigny, S
   Boiarinov, S
   Bradford, R
   Branford, D
   Brooks, WK
   Bultmann, S
   Burkert, VD
   Butuceanu, C
   Calarco, JR
   Careccia, SL
   Carman, DS
   Carnahan, B
   Cazes, A
   Chen, S
   Cole, PL
   Collins, P
   Coltharp, P
   Cords, D
   Corvisiero, P
   Crabb, D
   Crannell, H
   Crede, V
   Cummings, JP
   De Masi, R
   DeVita, R
   De Sanctis, E
   Degtyarenko, PV
   Denizli, H
   Dennis, L
   Deur, A
   Djalali, C
   Donnelly, J
   Doughty, D
   Dragovitsch, P
   Dugger, M
   Dytman, S
   Dzyubak, OP
   Egiyan, H
   Egiyan, KS
   Elouadrhiri, L
   Eugenio, P
   Fatemi, R
   Fedotov, G
   Feuerbach, RJ
   Funsten, H
   Garcon, M
   Gavalian, G
   Gilfoyle, GP
   Giovanetti, KL
   Girod, FX
   Goetz, JT
   Golovatch, E
   Gonenc, A
   Gothe, RW
   Griffioen, KA
   Guidal, M
   Guillo, M
   Guler, N
   Guo, L
   Gyurjyan, V
   Hadjidakis, C
   Hafidi, K
   Hakobyan, RS
   Hardie, J
   Heddle, D
   Hersman, FW
   Hicks, K
   Hleiqawi, I
   Holtrop, M
   Huertas, M
   Hyde-Wright, CE
   Ilieva, Y
   Ireland, DG
   Ishkhanov, BS
   Isupov, EL
   Ito, MM
   Jenkins, D
   Jo, HS
   Joo, K
   Juengst, HG
   Keith, C
   Kellie, JD
   Khandaker, M
   Kim, KY
   Kim, K
   Kim, W
   Klein, A
   Klein, FJ
   Klusman, M
   Kossov, M
   Kramer, LH
   Kubarovsky, V
   Kuhn, J
   Kuleshov, SV
   Lachniet, J
   Laget, JM
   Langheinrich, J
   Lawrence, D
   Li, J
   Lima, ACS
   Livingston, K
   Lu, H
   Lukashin, K
   MacCormick, M
   Manak, JJ
   Markov, N
   McAleer, S
   McKinnon, B
   McNabb, JWC
   Mecking, BA
   Mestayer, MD
   Meyer, CA
   Mibe, T
   Mikhailov, K
   Minehart, R
   Mirazita, M
   Miskimen, R
   Mokeev, V
   Morand, L
   Morrow, SA
   Moteabbed, M
   Mueller, J
   Mutchler, GS
   Nadel-Turonski, P
   Napolitano, J
   Nasseripour, R
   Niccolai, S
   Niculescu, G
   Niculescu, I
   Niczyporuk, BB
   Niroula, MR
   Niyazov, RA
   Nozar, M
   O'Rielly, GV
   Osipenko, M
   Ostrovidov, AI
   Park, K
   Pasyuk, E
   Paterson, C
   Philips, SA
   Pierce, J
   Pivnyuk, N
   Pocanic, D
   Pogorelko, O
   Polli, E
   Pozdniakov, S
   Preedom, BM
   Price, JW
   Protopopescu, D
   Qin, LM
   Raue, BA
   Riccardi, G
   Ricco, G
   Ripani, M
   Ronchetti, F
   Rosner, G
   Rossi, P
   Rowntree, D
   Rubin, PD
   Sabatie, F
   Salgado, C
   Santoro, JP
   Sapunenko, V
   Schumacher, RA
   Serov, VS
   Sharabian, YG
   Shaw, J
   Shvedunov, NV
   Skabelin, AV
   Smith, ES
   Smith, LC
   Sober, DI
   Stavinsky, A
   Stepanyan, SS
   Stepanyan, S
   Stokes, BE
   Stoler, P
   Strauch, S
   Suleiman, R
   Taiuti, M
   Taylor, S
   Tedeschi, DJ
   Thoma, U
   Thompson, R
   Tkabladze, A
   Tkachenko, S
   Todor, L
   Tur, C
   Ungaro, M
   Vineyard, MF
   Vlassov, AV
   Weinstein, LB
   Weygand, DP
   Williams, M
   Wolin, E
   Wood, MH
   Yegneswaran, A
   Yun, J
   Zana, L
   Zhang, J
   Zhao, B
   Zhao, Z
AF Bosted, P. E.
   Dharmawardane, K. V.
   Dodge, G. E.
   Forest, T. A.
   Kuhn, S. E.
   Prok, Y.
   Adams, G.
   Amarian, M.
   Ambrozewicz, P.
   Anghinolfi, M.
   Asryan, G.
   Avakian, H.
   Bagdasaryan, H.
   Baillie, N.
   Ball, J. P.
   Baltzell, N. A.
   Barrow, S.
   Batourine, V.
   Battaglieri, M.
   Beard, K.
   Bedlinskiy, I.
   Bektasoglu, M.
   Bellis, M.
   Benmouna, N.
   Biselli, A. S.
   Bonner, B. E.
   Bouchigny, S.
   Boiarinov, S.
   Bradford, R.
   Branford, D.
   Brooks, W. K.
   Bultmann, S.
   Burkert, V. D.
   Butuceanu, C.
   Calarco, J. R.
   Careccia, S. L.
   Carman, D. S.
   Carnahan, B.
   Cazes, A.
   Chen, S.
   Cole, P. L.
   Collins, P.
   Coltharp, P.
   Cords, D.
   Corvisiero, P.
   Crabb, D.
   Crannell, H.
   Crede, V.
   Cummings, J. P.
   De Masi, R.
   DeVita, R.
   De Sanctis, E.
   Degtyarenko, P. V.
   Denizli, H.
   Dennis, L.
   Deur, A.
   Djalali, C.
   Donnelly, J.
   Doughty, D.
   Dragovitsch, P.
   Dugger, M.
   Dytman, S.
   Dzyubak, O. P.
   Egiyan, H.
   Egiyan, K. S.
   Elouadrhiri, L.
   Eugenio, P.
   Fatemi, R.
   Fedotov, G.
   Feuerbach, R. J.
   Funsten, H.
   Garcon, M.
   Gavalian, G.
   Gilfoyle, G. P.
   Giovanetti, K. L.
   Girod, F. X.
   Goetz, J. T.
   Golovatch, E.
   Gonenc, A.
   Gothe, R. W.
   Griffioen, K. A.
   Guidal, M.
   Guillo, M.
   Guler, N.
   Guo, L.
   Gyurjyan, V.
   Hadjidakis, C.
   Hafidi, K.
   Hakobyan, R. S.
   Hardie, J.
   Heddle, D.
   Hersman, F. W.
   Hicks, K.
   Hleiqawi, I.
   Holtrop, M.
   Huertas, M.
   Hyde-Wright, C. E.
   Ilieva, Y.
   Ireland, D. G.
   Ishkhanov, B. S.
   Isupov, E. L.
   Ito, M. M.
   Jenkins, D.
   Jo, H. S.
   Joo, K.
   Juengst, H. G.
   Keith, C.
   Kellie, J. D.
   Khandaker, M.
   Kim, K. Y.
   Kim, K.
   Kim, W.
   Klein, A.
   Klein, F. J.
   Klusman, M.
   Kossov, M.
   Kramer, L. H.
   Kubarovsky, V.
   Kuhn, J.
   Kuleshov, S. V.
   Lachniet, J.
   Laget, J. M.
   Langheinrich, J.
   Lawrence, D.
   Li, Ji
   Lima, A. C. S.
   Livingston, K.
   Lu, H.
   Lukashin, K.
   MacCormick, M.
   Manak, J. J.
   Markov, N.
   McAleer, S.
   McKinnon, B.
   McNabb, J. W. C.
   Mecking, B. A.
   Mestayer, M. D.
   Meyer, C. A.
   Mibe, T.
   Mikhailov, K.
   Minehart, R.
   Mirazita, M.
   Miskimen, R.
   Mokeev, V.
   Morand, L.
   Morrow, S. A.
   Moteabbed, M.
   Mueller, J.
   Mutchler, G. S.
   Nadel-Turonski, P.
   Napolitano, J.
   Nasseripour, R.
   Niccolai, S.
   Niculescu, G.
   Niculescu, I.
   Niczyporuk, B. B.
   Niroula, M. R.
   Niyazov, R. A.
   Nozar, M.
   O'Rielly, G. V.
   Osipenko, M.
   Ostrovidov, A. I.
   Park, K.
   Pasyuk, E.
   Paterson, C.
   Philips, S. A.
   Pierce, J.
   Pivnyuk, N.
   Pocanic, D.
   Pogorelko, O.
   Polli, E.
   Pozdniakov, S.
   Preedom, B. M.
   Price, J. W.
   Protopopescu, D.
   Qin, L. M.
   Raue, B. A.
   Riccardi, G.
   Ricco, G.
   Ripani, M.
   Ronchetti, F.
   Rosner, G.
   Rossi, P.
   Rowntree, D.
   Rubin, P. D.
   Sabatie, F.
   Salgado, C.
   Santoro, J. P.
   Sapunenko, V.
   Schumacher, R. A.
   Serov, V. S.
   Sharabian, Y. G.
   Shaw, J.
   Shvedunov, N. V.
   Skabelin, A. V.
   Smith, E. S.
   Smith, L. C.
   Sober, D. I.
   Stavinsky, A.
   Stepanyan, S. S.
   Stepanyan, S.
   Stokes, B. E.
   Stoler, P.
   Strauch, S.
   Suleiman, R.
   Taiuti, M.
   Taylor, S.
   Tedeschi, D. J.
   Thoma, U.
   Thompson, R.
   Tkabladze, A.
   Tkachenko, S.
   Todor, L.
   Tur, C.
   Ungaro, M.
   Vineyard, M. F.
   Vlassov, A. V.
   Weinstein, L. B.
   Weygand, D. P.
   Williams, M.
   Wolin, E.
   Wood, M. H.
   Yegneswaran, A.
   Yun, J.
   Zana, L.
   Zhang, J.
   Zhao, B.
   Zhao, Z.
CA CLAS Collaboration
TI Quark-hadron duality in spin structure functions g(1)(p) and g(1)(d)
SO PHYSICAL REVIEW C
LA English
DT Article
ID RESONANCE-REGION; LOCAL DUALITY; FORM-FACTORS; SCATTERING; NUCLEON;
   TARGET; ELECTROPRODUCTION; ASYMMETRY; BEHAVIOR; PROTON
AB New measurements of the spin structure functions of the proton and deuteron g(1)(p)(x,Q(2)) and g(1)(d)(x,Q(2)) in the nucleon resonance region are compared with extrapolations of target-mass-corrected next-to-leading-order (NLO) QCD fits to higher energy data. Averaged over the entire resonance region (W < 2 GeV), the data and QCD fits are in good agreement in both magnitude and Q(2) dependence for Q(2 >)1.7 GeV2/c(2). This "global" duality appears to result from cancellations among the prominent "local" resonance regions: in particular strong sigma(3/2) contributions in the Delta(1232) region appear to be compensated by strong sigma(1/2) contributions in the resonance region centered on 1.5 GeV. These results are encouraging for the extension of NLO QCD fits to lower W and Q(2) than have been used previously.
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   Union Coll, Schenectady, NY 12308 USA.
   Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
   Univ Virginia, Charlottesville, VA 22901 USA.
   Coll William & Mary, Williamsburg, VA 23187 USA.
   Yerevan Phys Inst, Yerevan 375036, Armenia.
   Univ S Carolina, Columbia, SC 29208 USA.
   Univ Richmond, Richmond, VA 23173 USA.
   Rice Univ, Houston, TX 77005 USA.
   Rensselaer Polytech Inst, Troy, NY 12180 USA.
   Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   Old Dominion Univ, Norfolk, VA 23529 USA.
   Ohio Univ, Athens, OH 45701 USA.
   Norfolk State Univ, Norfolk, VA 23504 USA.
   Univ New Hampshire, Durham, NH 03824 USA.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Arizona State Univ, Tempe, AZ 85287 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   Calif State Univ Dominguez Hills, Carson, CA 90747 USA.
   Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   Catholic Univ Amer, Washington, DC 20064 USA.
   CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France.
   Christopher Newport Univ, Newport News, VA 23606 USA.
   Univ Connecticut, Storrs, CT 06269 USA.
   Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Fairfield Univ, Fairfield, CT 06824 USA.
   Florida Int Univ, Miami, FL 33199 USA.
   Florida State Univ, Tallahassee, FL 32306 USA.
   George Washington Univ, Washington, DC 20052 USA.
   Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
   Idaho State Univ, Pocatello, ID 83209 USA.
   Nazl Frascati Lab, Ist Nazl Fis Nucl, I-00044 Frascati, Italy.
   Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
   Inst Phys Nucl, F-91406 Orsay, France.
   Inst Theoret & Expt Phys, RU-117259 Moscow, Russia.
   James Madison Univ, Harrisonburg, VA 22807 USA.
   Kyungpook Natl Univ, Taegu 702701, South Korea.
   MIT, Cambridge, MA 02139 USA.
   Univ Massachusetts, Amherst, MA 01003 USA.
   Moscow MV Lomonosov State Univ, Gen Nucl Phys Inst, RU-119899 Moscow, Russia.
RP Bosted, PE (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
EM bosted@jlab.org
RI Sabatie, Franck/K-9066-2015; Osipenko, Mikhail/N-8292-2015; Zhang,
   Jixie/A-1461-2016; Isupov, Evgeny/J-2976-2012; Ishkhanov,
   Boris/E-1431-2012; Zhao, Bo/J-6819-2012; Brooks, William/C-8636-2013;
   Kuleshov, Sergey/D-9940-2013; Schumacher, Reinhard/K-6455-2013; Meyer,
   Curtis/L-3488-2014; Ireland, David/E-8618-2010; Bektasoglu,
   Mehmet/A-2074-2012; Lu, Haiyun/B-4083-2012; Protopopescu,
   Dan/D-5645-2012; riccardi, gabriele/A-9269-2012; Zana,
   Lorenzo/H-3032-2012
OI Sabatie, Franck/0000-0001-7031-3975; Osipenko,
   Mikhail/0000-0001-9618-3013; Sapunenko, Vladimir/0000-0003-1877-9043;
   Bellis, Matthew/0000-0002-6353-6043; Zhao, Bo/0000-0003-3171-5335;
   Brooks, William/0000-0001-6161-3570; Kuleshov,
   Sergey/0000-0002-3065-326X; Schumacher, Reinhard/0000-0002-3860-1827;
   Meyer, Curtis/0000-0001-7599-3973; Ireland, David/0000-0001-7713-7011; 
NR 39
TC 40
Z9 40
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 035203
DI 10.1103/PhysRevC.75.035203
PG 7
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200059
ER

PT J
AU Bradford, RK
   Schumacher, RA
   Adams, G
   Amaryan, MJ
   Ambrozewicz, P
   Anciant, E
   Anghinolfi, M
   Asavapibhop, B
   Asryan, G
   Audit, G
   Avakian, H
   Bagdasaryan, H
   Baillie, N
   Ball, JP
   Baltzell, NA
   Barrow, S
   Batourine, V
   Battaglieri, M
   Beard, K
   Bedlinskiy, I
   Bektasoglu, M
   Bellis, M
   Benmouna, N
   Berman, BL
   Bianchi, N
   Biselli, AS
   Bonner, BE
   Bouchigny, S
   Boiarinov, S
   Branford, D
   Briscoe, WJ
   Brooks, WK
   Bultmann, S
   Burkert, VD
   Butuceanu, C
   Calarco, JR
   Careccia, SL
   Carman, DS
   Carnahan, B
   Chen, S
   Cole, PL
   Coleman, A
   Collins, P
   Coltharp, P
   Cords, D
   Corvisiero, P
   Crabb, D
   Crannell, H
   Crede, V
   Cummings, JP
   De Masi, R
   De Sanctis, E
   De Vita, R
   Degtyarenko, PV
   Denizli, H
   Dennis, L
   Deur, A
   Dharmawardane, KV
   Dickson, R
   Djalali, C
   Dodge, GE
   Donnelly, J
   Doughty, D
   Dragovitsch, P
   Dugger, M
   Dytman, S
   Dzyubak, OP
   Egiyan, H
   Egiyan, KS
   El Fassi, L
   Elouadrhiri, L
   Empl, A
   Eugenio, P
   Fatemi, R
   Fedotov, G
   Feldman, G
   Feuerbach, RJ
   Forest, TA
   Funsten, H
   Garcon, M
   Gavalian, G
   Gilfoyle, GP
   Giovanetti, KL
   Girod, FX
   Goetz, JT
   Gonenc, A
   Gothe, RW
   Griffioen, KA
   Guidal, M
   Guillo, M
   Guler, N
   Guo, L
   Gyurjyan, V
   Hadjidakis, C
   Hafidi, K
   Hakobyan, H
   Hakobyan, RS
   Hardie, J
   Heddle, D
   Hersman, FW
   Hicks, K
   Hleiqawi, I
   Holtrop, M
   Hu, J
   Huertas, M
   Hyde-Wright, CE
   Ilieva, Y
   Ireland, DG
   Ishkhanov, BS
   Isupov, EL
   Ito, MM
   Jenkins, D
   Jo, HS
   Joo, K
   Juengst, HG
   Kalantarians, N
   Kellie, JD
   Khandaker, M
   Kim, KY
   Kim, K
   Kim, W
   Klein, A
   Klein, FJ
   Klusman, M
   Kossov, M
   Kramer, LH
   Kubarovsky, V
   Kuhn, J
   Kuhn, SE
   Kuleshov, SV
   Lachniet, J
   Laget, JM
   Langheinrich, J
   Lawrence, D
   Lima, ACS
   Livingston, K
   Lu, HY
   Lukashin, K
   MacCormick, M
   Manak, JJ
   Marchand, C
   Markov, N
   McAleer, S
   McKinnon, B
   McNabb, JWC
   Mecking, BA
   Mestayer, MD
   Meyer, CA
   Mibe, T
   Mikhailov, K
   Mirazita, M
   Miskimen, R
   Mokeev, V
   Moriya, K
   Morrow, SA
   Moteabbed, M
   Muccifora, V
   Mueller, J
   Mutchler, GS
   Nadel-Turonski, P
   Napolitano, J
   Nasseripour, R
   Natasha, N
   Niccolai, S
   Niculescu, G
   Niculescu, I
   Niczyporuk, BB
   Niroula, MR
   Niyazov, RA
   Nozar, M
   O'Rielly, GV
   Osipenko, M
   Ostrovidov, AI
   Park, K
   Pasyuk, E
   Paterson, C
   Philips, SA
   Pierce, J
   Pivnyuk, N
   Pocanic, D
   Pogorelko, O
   Polli, E
   Popa, I
   Pozdniakov, S
   Preedom, BM
   Price, JW
   Prok, Y
   Protopopescu, D
   Qin, LM
   Quinn, BP
   Raue, BA
   Riccardi, G
   Ricco, G
   Ripani, M
   Ritchie, BG
   Ronchetti, F
   Rosner, G
   Rossi, P
   Rowntree, D
   Rubin, PD
   Sabatie, F
   Salamanca, J
   Salgado, C
   Santoro, JP
   Sapunenko, V
   Serov, VS
   Shafi, A
   Sharabian, YG
   Shaw, J
   Shvedunov, NV
   Simionatto, S
   Skabelin, AV
   Smith, ES
   Smith, LC
   Sober, DI
   Sokhan, D
   Spraker, M
   Stavinsky, A
   Stepanyan, SS
   Stepanyan, S
   Stokes, BE
   Stoler, P
   Strakovsky, II
   Strauch, S
   Taiuti, M
   Taylor, S
   Tedeschi, DJ
   Thoma, U
   Thompson, R
   Tkabladze, A
   Tkachenko, S
   Todor, L
   Tur, C
   Ungaro, M
   Vineyard, MF
   Vlassov, AV
   Wang, K
   Watts, DP
   Weinstein, LB
   Weller, H
   Weygand, DP
   Williams, M
   Wolin, E
   Wood, MH
   Yegneswaran, A
   Yun, J
   Zana, L
   Zhang, J
   Zhao, B
   Zhao, ZW
AF Bradford, R. K.
   Schumacher, R. A.
   Adams, G.
   Amaryan, M. J.
   Ambrozewicz, P.
   Anciant, E.
   Anghinolfi, M.
   Asavapibhop, B.
   Asryan, G.
   Audit, G.
   Avakian, H.
   Bagdasaryan, H.
   Baillie, N.
   Ball, J. P.
   Baltzell, N. A.
   Barrow, S.
   Batourine, V.
   Battaglieri, M.
   Beard, K.
   Bedlinskiy, I.
   Bektasoglu, M.
   Bellis, M.
   Benmouna, N.
   Berman, B. L.
   Bianchi, N.
   Biselli, A. S.
   Bonner, B. E.
   Bouchigny, S.
   Boiarinov, S.
   Branford, D.
   Briscoe, W. J.
   Brooks, W. K.
   Bultmann, S.
   Burkert, V. D.
   Butuceanu, C.
   Calarco, J. R.
   Careccia, S. L.
   Carman, D. S.
   Carnahan, B.
   Chen, S.
   Cole, P. L.
   Coleman, A.
   Collins, P.
   Coltharp, P.
   Cords, D.
   Corvisiero, P.
   Crabb, D.
   Crannell, H.
   Crede, V.
   Cummings, J. P.
   De Masi, R.
   De Sanctis, E.
   De Vita, R.
   Degtyarenko, P. V.
   Denizli, H.
   Dennis, L.
   Deur, A.
   Dharmawardane, K. V.
   Dickson, R.
   Djalali, C.
   Dodge, G. E.
   Donnelly, J.
   Doughty, D.
   Dragovitsch, P.
   Dugger, M.
   Dytman, S.
   Dzyubak, O. P.
   Egiyan, H.
   Egiyan, K. S.
   El Fassi, L.
   Elouadrhiri, L.
   Empl, A.
   Eugenio, P.
   Fatemi, R.
   Fedotov, G.
   Feldman, G.
   Feuerbach, R. J.
   Forest, T. A.
   Funsten, H.
   Garcon, M.
   Gavalian, G.
   Gilfoyle, G. P.
   Giovanetti, K. L.
   Girod, F. X.
   Goetz, J. T.
   Gonenc, A.
   Gothe, R. W.
   Griffioen, K. A.
   Guidal, M.
   Guillo, M.
   Guler, N.
   Guo, L.
   Gyurjyan, V.
   Hadjidakis, C.
   Hafidi, K.
   Hakobyan, H.
   Hakobyan, R. S.
   Hardie, J.
   Heddle, D.
   Hersman, F. W.
   Hicks, K.
   Hleiqawi, I.
   Holtrop, M.
   Hu, J.
   Huertas, M.
   Hyde-Wright, C. E.
   Ilieva, Y.
   Ireland, D. G.
   Ishkhanov, B. S.
   Isupov, E. L.
   Ito, M. M.
   Jenkins, D.
   Jo, H. S.
   Joo, K.
   Juengst, H. G.
   Kalantarians, N.
   Kellie, J. D.
   Khandaker, M.
   Kim, K. Y.
   Kim, K.
   Kim, W.
   Klein, A.
   Klein, F. J.
   Klusman, M.
   Kossov, M.
   Kramer, L. H.
   Kubarovsky, V.
   Kuhn, J.
   Kuhn, S. E.
   Kuleshov, S. V.
   Lachniet, J.
   Laget, J. M.
   Langheinrich, J.
   Lawrence, D.
   Lima, A. C. S.
   Livingston, K.
   Lu, H. Y.
   Lukashin, K.
   MacCormick, M.
   Manak, J. J.
   Marchand, C.
   Markov, N.
   McAleer, S.
   McKinnon, B.
   McNabb, J. W. C.
   Mecking, B. A.
   Mestayer, M. D.
   Meyer, C. A.
   Mibe, T.
   Mikhailov, K.
   Mirazita, M.
   Miskimen, R.
   Mokeev, V.
   Moriya, K.
   Morrow, S. A.
   Moteabbed, M.
   Muccifora, V.
   Mueller, J.
   Mutchler, G. S.
   Nadel-Turonski, P.
   Napolitano, J.
   Nasseripour, R.
   Natasha, N.
   Niccolai, S.
   Niculescu, G.
   Niculescu, I.
   Niczyporuk, B. B.
   Niroula, M. R.
   Niyazov, R. A.
   Nozar, M.
   O'Rielly, G. V.
   Osipenko, M.
   Ostrovidov, A. I.
   Park, K.
   Pasyuk, E.
   Paterson, C.
   Philips, S. A.
   Pierce, J.
   Pivnyuk, N.
   Pocanic, D.
   Pogorelko, O.
   Polli, E.
   Popa, I.
   Pozdniakov, S.
   Preedom, B. M.
   Price, J. W.
   Prok, Y.
   Protopopescu, D.
   Qin, L. M.
   Quinn, B. P.
   Raue, B. A.
   Riccardi, G.
   Ricco, G.
   Ripani, M.
   Ritchie, B. G.
   Ronchetti, F.
   Rosner, G.
   Rossi, P.
   Rowntree, D.
   Rubin, P. D.
   Sabatie, F.
   Salamanca, J.
   Salgado, C.
   Santoro, J. P.
   Sapunenko, V.
   Serov, V. S.
   Shafi, A.
   Sharabian, Y. G.
   Shaw, J.
   Shvedunov, N. V.
   Simionatto, S.
   Skabelin, A. V.
   Smith, E. S.
   Smith, L. C.
   Sober, D. I.
   Sokhan, D.
   Spraker, M.
   Stavinsky, A.
   Stepanyan, S. S.
   Stepanyan, S.
   Stokes, B. E.
   Stoler, P.
   Strakovsky, I. I.
   Strauch, S.
   Taiuti, M.
   Taylor, S.
   Tedeschi, D. J.
   Thoma, U.
   Thompson, R.
   Tkabladze, A.
   Tkachenko, S.
   Todor, L.
   Tur, C.
   Ungaro, M.
   Vineyard, M. F.
   Vlassov, A. V.
   Wang, K.
   Watts, D. P.
   Weinstein, L. B.
   Weller, H.
   Weygand, D. P.
   Williams, M.
   Wolin, E.
   Wood, M. H.
   Yegneswaran, A.
   Yun, J.
   Zana, L.
   Zhang, J.
   Zhao, B.
   Zhao, Z. W.
CA CLAS Collaboration
TI First measurement of beam-recoil observables C-x and C-z in hyperon
   photoproduction
SO PHYSICAL REVIEW C
LA English
DT Article
ID PSEUDOSCALAR MESON PHOTOPRODUCTION; PHOTON ENERGIES; KAON
   PHOTOPRODUCTION; POLARIZATION; RESONANCES; SPIN; P(GAMMA; LAMBDA;
   BREMSSTRAHLUNG; K&LAMBDA
AB Spin transfer from circularly polarized real photons to recoiling hyperons has been measured for the reactions gamma+p -> K++Lambda and gamma+p -> K++Sigma(0). The data were obtained using the CEBAF Large Acceptance Spectrometer (CLAS) detector at the Jefferson Lab for center-of-mass energies W between 1.6 and 2.53 GeV, and for -0.85 < cos theta(+c.m.)(K)<+0.95. For the Lambda, the polarization transfer coefficient along the photon momentum axis, C-z, was found to be near unity for a wide range of energy and kaon production angles. The associated transverse polarization coefficient C-x is smaller than C-z by a roughly constant difference of unity. Most significantly, the total Lambda polarization vector, including the induced polarization P, has magnitude consistent with unity at all measured energies and production angles when the beam is fully polarized. For the Sigma(0) this simple phenomenology does not hold. All existing hadrodynamic models are in poor agreement with these results.
C1 Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Arizona State Univ, Tempe, AZ 85287 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   Calif State Univ Dominguez Hills, Carson, CA 90747 USA.
   Catholic Univ Amer, Washington, DC 20064 USA.
   CEA Saclay, Serv Phys Nucl, F-91191 Gif Sur Yvette, France.
   Christopher Newport Univ, Newport News, VA 23606 USA.
   Univ Connecticut, Storrs, CT 06269 USA.
   Duke Univ, Durham, NC 27708 USA.
   Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Fairfield Univ, Fairfield, CT 06824 USA.
   Florida Int Univ, Miami, FL 33199 USA.
   Florida State Univ, Tallahassee, FL 32306 USA.
   George Washington Univ, Washington, DC 20052 USA.
   Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
   Idaho State Univ, Pocatello, ID 83209 USA.
   Nazl Frascati Lab, INFN, I-00044 Frascati, Italy.
   Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
   Inst Nucl Phys, Orsay, France.
   Inst Theoret & Expt Phys, RU-117259 Moscow, Russia.
   James Madison Univ, Harrisonburg, VA 22807 USA.
   Kyungpook Natl Univ, Taegu 702701, South Korea.
   MIT, Cambridge, MA 02139 USA.
   Univ Massachusetts, Amherst, MA 01003 USA.
   Moscow MV Lomonosov State Univ, Gen Nucl Phys Inst, RU-119899 Moscow, Russia.
   Univ New Hampshire, Durham, NH 03824 USA.
   Norfolk State Univ, Norfolk, VA 23504 USA.
   Ohio Univ, Athens, OH 45701 USA.
   Old Dominion Univ, Norfolk, VA 23529 USA.
   Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   Rensselaer Polytech Inst, Troy, NY 12180 USA.
   Rice Univ, Houston, TX 77005 USA.
   Univ Richmond, Richmond, VA 23173 USA.
   Univ S Carolina, Columbia, SC 29208 USA.
   Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   Union Coll, Schenectady, NY 12308 USA.
   Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
   Univ Virginia, Charlottesville, VA 22901 USA.
   Coll William & Mary, Williamsburg, VA 23187 USA.
   Yerevan Phys Inst, Yerevan 375036, Armenia.
RP Bradford, RK (reprint author), Univ Rochester, 601 Elmwood Ave, Rochester, NY 14627 USA.
RI Sabatie, Franck/K-9066-2015; Osipenko, Mikhail/N-8292-2015; Zhang,
   Jixie/A-1461-2016; Quinn, Brian/N-7343-2014; Isupov, Evgeny/J-2976-2012;
   Ishkhanov, Boris/E-1431-2012; Zhao, Bo/J-6819-2012; Brooks,
   William/C-8636-2013; Kuleshov, Sergey/D-9940-2013; Schumacher,
   Reinhard/K-6455-2013; Meyer, Curtis/L-3488-2014; Ireland,
   David/E-8618-2010; Bektasoglu, Mehmet/A-2074-2012; Lu,
   Haiyun/B-4083-2012; Protopopescu, Dan/D-5645-2012; riccardi,
   gabriele/A-9269-2012; Zana, Lorenzo/H-3032-2012
OI Sabatie, Franck/0000-0001-7031-3975; Osipenko,
   Mikhail/0000-0001-9618-3013; Quinn, Brian/0000-0003-2800-986X;
   Sapunenko, Vladimir/0000-0003-1877-9043; Bellis,
   Matthew/0000-0002-6353-6043; Zhao, Bo/0000-0003-3171-5335; Brooks,
   William/0000-0001-6161-3570; Kuleshov, Sergey/0000-0002-3065-326X;
   Schumacher, Reinhard/0000-0002-3860-1827; Meyer,
   Curtis/0000-0001-7599-3973; Ireland, David/0000-0001-7713-7011; 
NR 59
TC 124
Z9 124
U1 1
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 035205
DI 10.1103/PhysRevC.75.035205
PG 25
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200061
ER

PT J
AU Clark, JA
   Sharma, KS
   Savard, G
   Levand, AF
   Wang, JC
   Zhou, Z
   Blank, B
   Buchinger, F
   Crawford, JE
   Gulick, S
   Lee, JKP
   Seweryniak, D
   Trimble, W
AF Clark, J. A.
   Sharma, K. S.
   Savard, G.
   Levand, A. F.
   Wang, J. C.
   Zhou, Z.
   Blank, B.
   Buchinger, F.
   Crawford, J. E.
   Gulick, S.
   Lee, J. K. P.
   Seweryniak, D.
   Trimble, W.
TI Precise measurement of the Ge-64 mass and its effect on the r p process
SO PHYSICAL REVIEW C
LA English
DT Article
ID ACCRETING NEUTRON-STARS; PENNING TRAP; REACTION-RATES; NUCLEAR;
   CYCLOTRON; NUCLEOSYNTHESIS
AB The Canadian Penning Trap mass spectrometer has been used to determine the mass excesses of Ge-64 and Ga-64 as -54344(30) keV and -58832.5(39) keV, respectively. Under typical conditions used for modeling x-ray bursts, Ge-64 is confirmed as a waiting-point nuclide and can contribute up to 35.5 s to the timescale of the rp process at a peak x-ray burst temperature of 1.5 GK.
C1 Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
   Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   CEN Bordeaux Gradignan, F-33175 Gradignan, France.
   McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
RP Clark, JA (reprint author), Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
RI Crawford, John/A-3771-2012
NR 30
TC 31
Z9 31
U1 1
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 032801
DI 10.1103/PhysRevC.75.032801
PG 5
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200006
ER

PT J
AU Hayes, AB
   Cline, D
   Wu, CY
   Ai, H
   Amro, H
   Beausang, C
   Casten, RF
   Gerl, J
   Hecht, AA
   Heinz, A
   Hua, H
   Hughes, R
   Janssens, RVF
   Lister, CJ
   Macchiavelli, AO
   Meyer, DA
   Moore, EF
   Napiorkowski, P
   Pardo, RC
   Schlegel, C
   Seweryniak, D
   Simon, MW
   Srebrny, J
   Teng, R
   Vetter, K
   Wollersheim, HJ
AF Hayes, A. B.
   Cline, D.
   Wu, C. Y.
   Ai, H.
   Amro, H.
   Beausang, C.
   Casten, R. F.
   Gerl, J.
   Hecht, A. A.
   Heinz, A.
   Hua, H.
   Hughes, R.
   Janssens, R. V. F.
   Lister, C. J.
   Macchiavelli, A. O.
   Meyer, D. A.
   Moore, E. F.
   Napiorkowski, P.
   Pardo, R. C.
   Schlegel, Ch.
   Seweryniak, D.
   Simon, M. W.
   Srebrny, J.
   Teng, R.
   Vetter, K.
   Wollersheim, H. J.
TI Spin dependence of K mixing, strong configuration mixing, and
   electromagnetic properties of Hf-178
SO PHYSICAL REVIEW C
LA English
DT Article
ID COULOMB-EXCITATION; TRANSITION-PROBABILITIES; BARRIER PENETRATION;
   VIBRATIONAL-STATES; NUCLEAR-STRUCTURE; DEFORMED-NUCLEI; ROTATIONAL BAND;
   ISOMERIC STATE; GAMMA-RAYS; DECAY
AB The combined data of two Coulomb excitation experiments has verified the purely electromagnetic population of the K-pi=4(+),6(+),8(-), and 16(+) rotational bands in Hf-178 via 2 <=nu <= 14 K-forbidden transitions, quantifying the breakdown of the K-selection rule with increasing spin in the low-K bands. The gamma-, 4(+), and 6(+) bands were extended, and four new states in a rotational band were tentatively assigned to a previously known K-pi=0(+) band. The quasiparticle structure of the 6(+) (t(1/2)=77 ns) and 8(-) (t(1/2)=4 s) isomer bands were evaluated, showing that the gyromagnetic ratios of the 6(+) isomer band are consistent with a pure pi(7)/(+)(2)[404],pi(5)/(+)(2)[402] structure. The 8(-) isomer band at 1147 keV and the second 8(-) band at 1479 keV, thought to be predominantly nu(7)/(-)(2)[514],nu(9)/(+)(2)[624] and pi(9)/(-)(2)[514],pi(7)/(+)(2)[404], respectively, are mixed to a degree approaching the strong-mixing limit. Based on measured < K-pi=16(+)parallel to E2 parallel to K-pi=0(+)> matrix elements, it was shown that heavy-ion bombardment could depopulate the 16(+) isomer at the similar to 1% level, although no states were found that would mediate photodeexcitation of the isomer via low-energy x-ray absorption.
C1 Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
   Univ Richmond, Dept Phys, Richmond, VA 23173 USA.
   GSI Darmstadt, Gesell Schwerionenforsch, D-64291 Darmstadt, Germany.
   Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Warsaw Univ, Heavy Ion Lab, Warsaw, Poland.
   Warsaw Univ, Inst Phys Expt, Warsaw, Poland.
RP Hayes, AB (reprint author), Peking Univ, Sch Phys, Beijing 100871, Peoples R China.
RI Gerl, Juergen/A-3255-2011; Heinz, Andreas/E-3191-2014
NR 78
TC 15
Z9 17
U1 0
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034308
DI 10.1103/PhysRevC.75.034308
PG 27
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200018
ER

PT J
AU Jia, JY
   Zhang, C
AF Jia, Jiangyong
   Zhang, Chun
TI Quark number scaling of v(2) in transverse kinetic energy and its
   implications for coalescence models
SO PHYSICAL REVIEW C
LA English
DT Article
ID ELLIPTIC FLOW; RECOMBINATION; ANISOTROPY; COLLISIONS
AB We find that a simple extension of the coalescence model is sufficient to incorporate the perfect quark number scaling behavior of the elliptic flow in transverse kinetic energy, recently discovered by the PHENIX Collaboration. The flavor dependence of the elliptic flow can be consistently described in the low and intermediate p(T) if the transverse kinetic energy is conserved in the 2 -> 1 or 3 -> 1 parton coalescence process at the hadronization. Thus suggesting the quark coalescence as a possible hadronization mechanism at low p(T) as well.
C1 Columbia Univ, New York, NY 10027 USA.
   Nevis Labs, Irvington, NY 10533 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA.
RP Jia, JY (reprint author), Columbia Univ, New York, NY 10027 USA.
NR 28
TC 6
Z9 6
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 031901
DI 10.1103/PhysRevC.75.031901
PG 4
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200004
ER

PT J
AU Johnson, MB
   Kopeliovich, BZ
   Leitch, MJ
   McGaughey, PL
   Moss, JM
   Potashnikova, IK
   Schmidt, I
AF Johnson, M. B.
   Kopeliovich, B. Z.
   Leitch, M. J.
   McGaughey, P. L.
   Moss, J. M.
   Potashnikova, I. K.
   Schmidt, Ivan
TI Nuclear broadening of transverse momentum in Drell-Yan reactions
SO PHYSICAL REVIEW C
LA English
DT Article
ID GLUON DISTRIBUTION-FUNCTIONS; ENERGY-LOSS; DIMUON PRODUCTION;
   J/PSI-PRODUCTION; DEPENDENCE; COLLISIONS; QUARK; SCATTERING; PAIRS; QCD
AB Data for Drell-Yan (DY) processes on nuclei are currently available from fixed target experiments up to the highest energy of root s=40 GeV. The bulk of the data cover the range of short coherence length, where the amplitudes of the DY reaction on different nucleons do not interfere. In this regime, DY processes provide direct information about broadening of the transverse momentum of the projectile parton experiencing initial-state multiple interactions. We revise a previous analysis of data from the E772 experiment and perform a new analysis of broadening including data from the E866 experiment at Fermilab. We conclude that the observed broadening is about twice as large as the one found previously. This helps to settle controversies that arose from a comparison of the original determination of broadening with data from other experiments and reactions.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile.
   Joint Nucl Res Inst, Dubna, Russia.
   Heidelberg Univ, Inst Theoret Phys, D-6900 Heidelberg, Germany.
RP Johnson, MB (reprint author), Los Alamos Natl Lab, MS H846, Los Alamos, NM 87545 USA.
RI Schmidt, Ivan/J-5920-2012
NR 40
TC 17
Z9 17
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 035206
DI 10.1103/PhysRevC.75.035206
PG 7
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200062
ER

PT J
AU Michel, N
   Nazarewicz, W
   Ploszajczak, M
AF Michel, N.
   Nazarewicz, W.
   Ploszajczak, M.
TI Threshold effects in multichannel coupling and spectroscopic factors in
   exotic nuclei
SO PHYSICAL REVIEW C
LA English
DT Article
ID R-MATRIX THEORY; CROSS-SECTIONS; ELASTIC SCATTERING; ENERGY DEPENDENCE;
   RESONANT STATES; D,P; CHANNELS; E,E'P
AB In the threshold region, the cross section and the associated overlap integral obey the Wigner threshold law that results in the Wigner-cusp phenomenon. Due to flux conservation, a cusp anomaly in one channel manifests itself in other open channels, even if their respective thresholds appear at a different energy. The shape of a threshold cusp depends on the orbital angular momentum of a scattered particle; hence, studies of Wigner anomalies in weakly bound nuclei with several low-lying thresholds can provide valuable spectroscopic information. In this work, we investigate the threshold behavior of spectroscopic factors in neutron-rich drip-line nuclei using the Gamow shell model, which takes into account many-body correlations and the continuum effects. The presence of threshold anomalies is demonstrated and the implications for spectroscopic factors are discussed.
C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA.
   Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland.
   CEA, Grand Accelerateur Natl Ions Lourds, DSM, CNRS,IN2P3, F-14076 Caen, France.
RP Michel, N (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
NR 48
TC 50
Z9 50
U1 0
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 031301
DI 10.1103/PhysRevC.75.031301
PG 5
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200002
ER

PT J
AU Misicu, S
   Esbensen, H
AF Misicu, S.
   Esbensen, H.
TI Signature of shallow potentials in deep sub-barrier fusion reactions
SO PHYSICAL REVIEW C
LA English
DT Article
ID CLUSTER RADIOACTIVITY; ELASTIC SCATTERING; ION POTENTIALS;
   CROSS-SECTIONS; FOLDING MODEL; HEAVY-IONS; ENERGIES; RESONANCES;
   FISSION; CF-252
AB We extend a recent study that explained the steep falloff in the fusion cross section at energies far below the Coulomb barrier for the symmetric dinuclear system Ni-64+Ni-64 to another symmetric system, Ni-58+Ni-58, and the asymmetric system Ni-64+Mo-100. In this scheme, the very sensitive dependence of the internal part of the nuclear potential on the nuclear equation of state determines a reduction of the classically allowed region for overlapping configurations and consequently a decrease in the fusion cross sections at bombarding energies far below the barrier. Within the coupled-channels method, including couplings to the low-lying 2(+) and 3(-) states in both target and projectile as well as mutual and two-phonon excitations of these states, we calculate and compare with the experimental data the fusion cross sections, S factors, and logarithmic derivatives for the above-mentioned systems and find good agreement with the data even at the lowest energies. We predict, in particular, a distinct double peaking in the S factor for the far sub-barrier fusion of Ni-58+Ni-58, which should be tested experimentally.
C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RP Misicu, S (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA.
RI Misicu, Serban/B-6860-2011; 
OI Misicu, Serban/0000-0002-2876-1288
NR 63
TC 101
Z9 101
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034606
DI 10.1103/PhysRevC.75.034606
PG 14
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200035
ER

PT J
AU Ngijoi-Yogo, E
   Tandel, SK
   Mukherjee, G
   Shestakova, I
   Chowdhury, P
   Wu, CY
   Cline, D
   Hayes, AB
   Teng, R
   Clark, RM
   Fallon, P
   Macchiavelli, AO
   Vetter, K
   Kondev, FG
   Langdown, S
   Walker, PM
   Wheldon, C
   Cullen, DM
AF Ngijoi-Yogo, E.
   Tandel, S. K.
   Mukherjee, G.
   Shestakova, I.
   Chowdhury, P.
   Wu, C. Y.
   Cline, D.
   Hayes, A. B.
   Teng, R.
   Clark, R. M.
   Fallon, P.
   Macchiavelli, A. O.
   Vetter, K.
   Kondev, F. G.
   Langdown, S.
   Walker, P. M.
   Wheldon, C.
   Cullen, D. M.
TI Collective rotation and vibration in neutron-rich Hf-180,Hf-182 nuclei
SO PHYSICAL REVIEW C
LA English
DT Article
ID MULTI-QUASI-PARTICLE; HAFNIUM NUCLEI; HF ISOTOPES; GAMMA; STATES;
   ALIGNMENT; ISOMERS; SPECTRA; HF-180; TRAPS
AB High-spin states in neutron-rich Hf-180 and Hf-182 nuclei were populated through inelastic and transfer reactions with a Xe-136 beam incident on a thin Hf-180 target, and investigated using particle-gamma coincidence techniques. New collective band structures were observed, and previously known rotational and vibrational bands in these nuclei were extended to higher angular momenta. No obvious nucleon alignment was observed in the ground state band of either nucleus up to h omega=0.43 MeV, a significant delay compared to lighter even-even Hf isotopes. Woods-Saxon cranking calculations were performed to predict the nature of the first band crossings and shape evolution in Hf-180,Hf-182.
C1 Univ Massachusetts Lowell, Dept Phys, Lowell, MA 01854 USA.
   Univ Rochester, Nucl Struct Res Lab, Rochester, NY 14627 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.
   Univ Liverpool, Oliver Lodge Lab, Dept Phys, Liverpool L69 7ZE, Merseyside, England.
   Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England.
RP Chowdhury, P (reprint author), Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA.
EM partha_chowdhury@uml.edu
RI Wheldon, Carl/F-9203-2013
NR 41
TC 12
Z9 13
U1 0
U2 4
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034305
DI 10.1103/PhysRevC.75.034305
PG 14
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200015
ER

PT J
AU Safkan, Y
   Akdogan, T
   Franklin, WA
   Matthews, JL
   Schmitt, WM
   Zelevinsky, VV
   Gram, PAM
   Taddeucci, TN
   Wender, SA
   Pate, SF
AF Safkan, Y.
   Akdogan, T.
   Franklin, W. A.
   Matthews, J. L.
   Schmitt, W. M.
   Zelevinsky, V. V.
   Gram, P. A. M.
   Taddeucci, T. N.
   Wender, S. A.
   Pate, S. F.
TI Differential cross section for neutron-proton bremsstrahlung
SO PHYSICAL REVIEW C
LA English
DT Article
ID NUCLEON-NUCLEON BREMSSTRAHLUNG
AB The neutron-proton bremsstrahlung process (np -> np gamma) is known to be sensitive to meson exchange currents in the nucleon-nucleon interaction. The triply differential cross section for this reaction has been measured for the first time at the Los Alamos Neutron Science Center, using an intense, pulsed beam of up to 700-MeV neutrons to bombard a liquid hydrogen target. Scattered neutrons were observed at six angles between 12(degrees) and 32(degrees), and the recoil protons were observed in coincidence at 12(degrees),20(degrees), and 28(degrees) on the opposite side of the beam. Measurement of the neutron and proton energies at known angles allows full kinematic reconstruction of each event. The data are compared with predictions of two theoretical calculations, based on relativistic soft-photon and nonrelativistic potential models.
C1 MIT, Dept Phys, Cambridge, MA 02139 USA.
   MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA.
RP Safkan, Y (reprint author), Overteam Technol, Istanbul, Turkey.
OI Wender, Stephen/0000-0002-2446-5115
NR 20
TC 12
Z9 12
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 031001
DI 10.1103/PhysRevC.75.031001
PG 4
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200001
ER

PT J
AU Sorenson, DS
   Ullmann, JL
   Ling, A
   Park, BK
   Haight, RC
   King, NSP
   Lindgren, RA
   Baghaei, H
   Stephenson, EJ
   Brady, FP
   Romero, JL
   Rapaport, J
   Clausen, BL
   Wuest, C
   Sammarruca, F
AF Sorenson, D. S.
   Ullmann, J. L.
   Ling, A.
   Park, B. K.
   Haight, R. C.
   King, N. S. P.
   Lindgren, R. A.
   Baghaei, H.
   Stephenson, E. J.
   Brady, F. P.
   Romero, J. L.
   Rapaport, J.
   Clausen, B. L.
   Wuest, C.
   Sammarruca, F.
TI Limitations of the distorted-wave impulse approximation in describing
   the energy dependence of the B-10(n, p)Be-10 (g.s.) reaction
SO PHYSICAL REVIEW C
LA English
DT Article
ID INELASTIC PROTON-SCATTERING; ELECTRON-SCATTERING; INTERMEDIATE ENERGIES;
   POLARIZED PROTONS; STATES; SPECTROSCOPY; STRENGTH; SI-28; C-13
AB We report differential cross section measurements for the stretched transition from the B-10 ground state (J(pi)=3(+)) to the Be-10 ground state (J(pi)=0(+)) in the B-10(n,p)Be-10 (g.s.) reaction. These data were obtained over the energy range from 70 to 240 MeV, covering momentum transfer values from 0.6 to 2.5 fm(-1). In this momentum transfer range, the isovector tensor effective interaction dominates the transition. Cross sections are compared to zero- and finite-range distorted wave impulse approximation calculations using modern free and density-dependent effective interactions and a transition density consistent with (e,e(')) data. Good agreement is observed at energies above 120 MeV, but below this energy the cross sections are larger than the calculated values by more than 40%. The implications for DWIA calculations are discussed.
C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
   Univ Virginia, Charlottesville, VA 22901 USA.
   Indiana Univ, Cyclotron Facil, Bloomington, IN 47408 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Ohio Univ, Athens, OH 45701 USA.
   Loma Linda Univ, Geosci Res Inst, Loma Linda, CA 92350 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Univ Idaho, Moscow, ID 83844 USA.
RP Sorenson, DS (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
NR 61
TC 1
Z9 1
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
EI 1089-490X
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034611
DI 10.1103/PhysRevC.75.034611
PG 11
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200040
ER

PT J
AU Terlizzi, R
   Abbondanno, U
   Aerts, G
   Alvarez, H
   Alvarez-Velarde, H
   Alvarez-Velarde, F
   Andriamonje, S
   Andrzejewski, J
   Assimakopoulos, P
   Audouin, L
   Badurek, G
   Baumann, P
   Becvar, F
   Berthoumieux, E
   Calviani, M
   Calvino, F
   Cano-Ott, D
   Capote, R
   de Albornoz, AC
   Cennini, P
   Chepel, V
   Chiaveri, E
   Colonna, N
   Cortes, G
   Couture, A
   Cox, J
   Dahlfors, M
   David, S
   Dillmann, I
   Dolfini, R
   Domingo-Pardo, C
   Dridi, W
   Duran, I
   Eleftheriadis, C
   Embid-Segura, M
   Ferrant, L
   Ferrari, A
   Ferreira-Marques, R
   Fitzpatrick, L
   Frais-Koelbl, H
   Fujii, K
   Furman, W
   Gallino, R
   Goncalves, I
   Gonzalez-Romero, E
   Goverdovski, A
   Gramegna, F
   Griesmayer, E
   Guerrero, C
   Gunsing, F
   Haas, B
   Haight, R
   Heil, M
   Herrera-Martinez, A
   Igashira, M
   Isaev, S
   Jericha, E
   Kadi, Y
   Kappeler, F
   Karamanis, D
   Karadimos, D
   Kerveno, M
   Ketlerov, V
   Koehler, P
   Konovalov, V
   Kossionides, E
   Krticka, M
   Lamboudis, C
   Leeb, H
   Lindote, A
   Lopes, I
   Lozano, M
   Lukic, S
   Marganiec, J
   Marques, L
   Marrone, S
   Massimi, C
   Mastinu, P
   Mengoni, A
   Milazzo, PM
   Moreau, C
   Mosconi, M
   Neves, F
   Oberhummer, H
   O'Brien, S
   Pancin, J
   Papachristodoulou, C
   Papadopoulos, C
   Paradela, C
   Patronis, N
   Pavlik, A
   Pavlopoulos, P
   Perrot, L
   Pignatari, M
   Plag, R
   Plompen, A
   Plukis, A
   Poch, A
   Pretel, C
   Quesada, J
   Rauscher, T
   Reifarth, R
   Rosetti, M
   Rubbia, C
   Rudolf, G
   Rullhusen, P
   Salgado, J
   Sarchiapone, L
   Savvidis, I
   Stephan, C
   Tagliente, G
   Tain, JL
   Tassan-Got, L
   Tavora, L
   Vannini, G
   Vaz, P
   Ventura, A
   Villamarin, D
   Vincente, MC
   Vlachoudis, V
   Vlastou, R
   Voss, F
   Walter, S
   Wendler, H
   Wiescher, M
   Wisshak, K
AF Terlizzi, R.
   Abbondanno, U.
   Aerts, G.
   Alvarez, H.
   Alvarez-Velarde, H.
   Alvarez-Velarde, F.
   Andriamonje, S.
   Andrzejewski, J.
   Assimakopoulos, P.
   Audouin, L.
   Badurek, G.
   Baumann, P.
   Becvar, F.
   Berthoumieux, E.
   Calviani, M.
   Calvino, F.
   Cano-Ott, D.
   Capote, R.
   de Albornoz, A. Carrillo
   Cennini, P.
   Chepel, V.
   Chiaveri, E.
   Colonna, N.
   Cortes, G.
   Couture, A.
   Cox, J.
   Dahlfors, M.
   David, S.
   Dillmann, I.
   Dolfini, R.
   Domingo-Pardo, C.
   Dridi, W.
   Duran, I.
   Eleftheriadis, C.
   Embid-Segura, M.
   Ferrant, L.
   Ferrari, A.
   Ferreira-Marques, R.
   Fitzpatrick, L.
   Frais-Koelbl, H.
   Fujii, K.
   Furman, W.
   Gallino, R.
   Goncalves, I.
   Gonzalez-Romero, E.
   Goverdovski, A.
   Gramegna, F.
   Griesmayer, E.
   Guerrero, C.
   Gunsing, F.
   Haas, B.
   Haight, R.
   Heil, M.
   Herrera-Martinez, A.
   Igashira, M.
   Isaev, S.
   Jericha, E.
   Kadi, Y.
   Kaeppeler, F.
   Karamanis, D.
   Karadimos, D.
   Kerveno, M.
   Ketlerov, V.
   Koehler, P.
   Konovalov, V.
   Kossionides, E.
   Krticka, M.
   Lamboudis, C.
   Leeb, H.
   Lindote, A.
   Lopes, I.
   Lozano, M.
   Lukic, S.
   Marganiec, J.
   Marques, L.
   Marrone, S.
   Massimi, C.
   Mastinu, P.
   Mengoni, A.
   Milazzo, P. M.
   Moreau, C.
   Mosconi, M.
   Neves, F.
   Oberhummer, H.
   O'Brien, S.
   Pancin, J.
   Papachristodoulou, C.
   Papadopoulos, C.
   Paradela, C.
   Patronis, N.
   Pavlik, A.
   Pavlopoulos, P.
   Perrot, L.
   Pignatari, M.
   Plag, R.
   Plompen, A.
   Plukis, A.
   Poch, A.
   Pretel, C.
   Quesada, J.
   Rauscher, T.
   Reifarth, R.
   Rosetti, M.
   Rubbia, C.
   Rudolf, G.
   Rullhusen, P.
   Salgado, J.
   Sarchiapone, L.
   Savvidis, I.
   Stephan, C.
   Tagliente, G.
   Tain, J. L.
   Tassan-Got, L.
   Tavora, L.
   Vannini, G.
   Vaz, P.
   Ventura, A.
   Villamarin, D.
   Vincente, M. C.
   Vlachoudis, V.
   Vlastou, R.
   Voss, F.
   Walter, S.
   Wendler, H.
   Wiescher, M.
   Wisshak, K.
TI The La-139(n,gamma) cross section: Key for the onset of the s-process
SO PHYSICAL REVIEW C
LA English
DT Article
ID METAL-POOR STARS; NEUTRON-CAPTURE ELEMENTS; GIANT BRANCH STARS; GALACTIC
   CHEMICAL EVOLUTION; R-PROCESS ELEMENTS; COOL DWARF STARS; RESONANCE
   SPECTROSCOPY; N-TOF; DISPERSION SPECTROGRAPH; PROCESS NUCLEOSYNTHESIS
AB The nuclear resonance parameters and the capture cross section of the neutron magic isotope La-139 have been measured relative to Au-197 in the energy range of 0.6 eV to 9 keV at the neutron time-of-flight (n_TOF) facility at CERN. We describe the experimental apparatus and the data analysis procedures, which concerned mainly the efficiency correction by means of the pulse height weighting function technique and the determination of different background components. We extracted the resonance parameters and the main nuclear quantities such as the resonance integral RI=10.8 +/- 1.0b, the average gamma widths for s and p waves <Gamma(gamma)>(l=0)=50.7 +/- 5.4 meV and <Gamma(gamma)>(l=1)=33.6 +/- 6.9 meV, the nuclear level densities < D >(l=0)=252 +/- 22 eV and < D >(l=1)< 250 eV, and the neutron strength functions S-0=(0.82 +/- 0.05)x10(-4) and S-1=(0.55 +/- 0.04)x10(-4). These results represent a significant improvement over previous data. The deduced Maxwellian-averaged capture cross sections are important for the interpretation of the most recent spectroscopic observations in low-metallicity stars.
C1 Vienna Univ Technol, Atominst Osterreich Univ, A-1060 Vienna, Austria.
   Univ Vienna, Inst Isotopenforsch & Kernphys, A-1010 Vienna, Austria.
   NAPC Nucl Data Sect, Int Atom Energy Agcy, Vienna, Austria.
   Fachhsch Wiener Neustadt, Wiener Neustadt, Austria.
   IRMM, JRC, CEC, Geel, Belgium.
   Charles Univ Prague, CR-11636 Prague 1, Czech Republic.
   CEA Saclay, DSM, Gif Sur Yvette, France.
   CNRS, IN2P3, CENBG, Bordeaux, France.
   IPN, IN2P3, CNRS, Orsay, France.
   IReS, IN2P3, CNRS, Strasbourg, France.
   Pole Univ Leonard Vinci, Paris, France.
   Forschungszentrum Karlsruhe, Inst Kernphys, Karlsruhe, Germany.
   Aristotle Univ Thessaloniki, GR-54006 Thessaloniki, Greece.
   Natl Tech Univ Athens, GR-10682 Athens, Greece.
   NCSR, Athens, Greece.
   Univ Ioannina, GR-45110 Ioannina, Greece.
   ENEA, Bologna, Italy.
   Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
   Univ Bari, Dipartimento Fis, I-70121 Bari, Italy.
   Ist Nazl Fis Nucl, I-70121 Bari, Italy.
   Ist Nazl Fis Nucl, I-34014 Trieste, Italy.
   Univ Bologna, Dipartimento Fis, I-40126 Bologna, Italy.
   Sez INFN Bologna, I-40126 Bologna, Italy.
   Sez INFN Torino, Turin, Italy.
   Univ Turin, Dipartimento Fis, I-10123 Turin, Italy.
   Univ Pavia, I-27100 Pavia, Italy.
   Tokyo Inst Technol, Tokyo 152, Japan.
   Univ Lodz, PL-90131 Lodz, Poland.
   Inst Tecnol & Nucl, Lisbon, Portugal.
   Univ Coimbra, LIP Coimbra, P-3000 Coimbra, Portugal.
   Univ Coimbra, Dept Fis, P-3000 Coimbra, Portugal.
   Inst Phys & Power Engn, Obninsk, Russia.
   Frank Lab Neutron Phys, Joint Nucl Res Inst, Dubna, Russia.
   Ctr Investigac Energet Medioambientales & Technol, Madrid, Spain.
   Univ Valencia, CSIC, Ist Fis Corpuscolar, E-46003 Valencia, Spain.
   Univ Politecn Cataluna, E-08028 Barcelona, Spain.
   Univ Politecn Madrid, E-28040 Madrid, Spain.
   Univ Santiago de Compostela, Santiago De Compostela, Spain.
   Univ Seville, E-41009 Seville, Spain.
   CERN, CH-1211 Geneva, Switzerland.
   Univ Basel, Dept Phys & Astron, CH-4003 Basel, Switzerland.
   Los Alamos Natl Lab, Los Alamos, NM 87544 USA.
   Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37830 USA.
RP Terlizzi, R (reprint author), Via Orabona 4, I-70125 Bari, Italy.
RI Mengoni, Alberto/I-1497-2012; Quesada Molina, Jose Manuel/K-5267-2014;
   Gonzalez Romero, Enrique/L-7561-2014; Pretel Sanchez, Carme/L-8287-2014;
   Capote Noy, Roberto/M-1245-2014; Massimi, Cristian/B-2401-2015; Duran,
   Ignacio/H-7254-2015; Alvarez Pol, Hector/F-1930-2011; Massimi,
   Cristian/K-2008-2015; Paradela, Carlos/J-1492-2012; Gramegna,
   Fabiana/B-1377-2012; Calvino, Francisco/K-5743-2014; Jericha,
   Erwin/A-4094-2011; Patronis, Nikolaos/A-3836-2008; Rauscher,
   Thomas/D-2086-2009; Ventura, Alberto/B-9584-2011; Lindote,
   Alexandre/H-4437-2013; Neves, Francisco/H-4744-2013; Vaz,
   Pedro/K-2464-2013; Lopes, Isabel/A-1806-2014; Cortes,
   Guillem/B-6869-2014; Tain, Jose L./K-2492-2014; Cano Ott,
   Daniel/K-4945-2014
OI Mengoni, Alberto/0000-0002-2537-0038; Quesada Molina, Jose
   Manuel/0000-0002-2038-2814; Gonzalez Romero,
   Enrique/0000-0003-2376-8920; Capote Noy, Roberto/0000-0002-1799-3438;
   Massimi, Cristian/0000-0001-9792-3722; Alvarez Pol,
   Hector/0000-0001-9643-6252; Massimi, Cristian/0000-0003-2499-5586;
   Gramegna, Fabiana/0000-0001-6112-0602; Calvino,
   Francisco/0000-0002-7198-4639; Jericha, Erwin/0000-0002-8663-0526;
   Rauscher, Thomas/0000-0002-1266-0642; Ventura,
   Alberto/0000-0001-6748-7931; Lindote, Alexandre/0000-0002-7965-807X;
   Neves, Francisco/0000-0003-3635-1083; Vaz, Pedro/0000-0002-7186-2359;
   Lopes, Isabel/0000-0003-0419-903X; Cano Ott, Daniel/0000-0002-9568-7508
NR 78
TC 21
Z9 21
U1 1
U2 14
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9985
EI 2469-9993
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 035807
DI 10.1103/PhysRevC.75.035807
PG 15
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200071
ER

PT J
AU Tovesson, F
   Hill, TS
AF Tovesson, F.
   Hill, T. S.
TI Neutron induced fission cross section of Np-237 from 100 keV to 200 MeV
SO PHYSICAL REVIEW C
LA English
DT Article
ID U-235
AB An experimental program at Los Alamos Neutron Science Center (LANSCE) has been developed to precisely measure fission cross sections over ten decades in incident neutron energy for a range of actinides relevant to advanced nuclear reactor designs and transmutation concepts. The first completed measurement is of Np-237(n,f), and the above-reaction-threshold part of the measurement is reported here. The result is in close agreement with ENDF/B-VI in the energy region of first- and second-chance fission. The cross section ratio to U-235 is shown to be constant from 30 MeV to the highest measured energy of 200 MeV.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Tovesson, F (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM tovesson@lanl.gov
NR 29
TC 34
Z9 34
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2813
J9 PHYS REV C
JI Phys. Rev. C
PD MAR
PY 2007
VL 75
IS 3
AR 034610
DI 10.1103/PhysRevC.75.034610
PG 8
WC Physics, Nuclear
SC Physics
GA 152AJ
UT WOS:000245332200039
ER

PT J
AU Abazajian, KN
   Markevitch, M
   Koushiappas, SM
   Hickox, RC
AF Abazajian, Kevork N.
   Markevitch, Maxim
   Koushiappas, Savvas M.
   Hickox, Ryan C.
TI Limits on the radiative decay of sterile neutrino dark matter from the
   unresolved cosmic and soft X-ray backgrounds
SO PHYSICAL REVIEW D
LA English
DT Article
ID MILKY-WAY; CHANDRA; MODELS; HALO; OSCILLATIONS; CONSTRAINTS; PARTICLES;
   GALAXIES; CORE
AB We present upper limits on line emission in the Cosmic X-ray background (CXB) that would be produced by decay of sterile neutrino dark matter. We employ the spectra of the unresolved component of the CXB in the Chandra Deep Fields North and South obtained with the Chandra CCD detector in the E=0.8-9 keV band. The expected decay flux comes from the dark matter on the lines of sight through the Milky Way galactic halo. Our constraints on the sterile neutrino decay rate are sensitive to the modeling of the Milky Way halo. The highest halo mass estimates provide a limit on the sterile neutrino mass of m(s)< 2.9 keV in the Dodelson-Widrow production model, while the lowest halo mass estimates provide the conservative limit of m(s)< 5.7 keV (2 sigma). We also discuss constraints from a short observation of the softer (E < 1 keV) X-ray background with a rocket-borne calorimeter by McCammon and collaborators.
C1 Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   Russian Acad Sci, Space Res Inst, Moscow 117997, Russia.
   Los Alamos Natl Lab, ISR Div, Los Alamos, NM 87545 USA.
RP Abazajian, KN (reprint author), Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
NR 66
TC 65
Z9 65
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 6
AR 063511
DI 10.1103/PhysRevD.75.063511
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AW
UT WOS:000245333600024
ER

PT J
AU Abulencia, A
   Adelman, J
   Affolder, T
   Akimoto, T
   Albrow, MG
   Ambrose, D
   Amerio, S
   Amidei, D
   Anastassov, A
   Anikeev, K
   Annovi, A
   Antos, J
   Aoki, M
   Apollinari, G
   Arguin, JF
   Arisawa, T
   Artikov, A
   Ashmanskas, W
   Attal, A
   Azfar, F
   Azzi-Bacchetta, P
   Azzurri, P
   Bacchetta, N
   Badgett, W
   Barbaro-Galtieri, A
   Barnes, VE
   Barnett, BA
   Baroiant, S
   Bartsch, V
   Bauer, G
   Bedeschi, F
   Behari, S
   Belforte, S
   Bellettini, G
   Bellinger, J
   Belloni, A
   Benjamin, D
   Beretvas, A
   Beringer, J
   Berry, T
   Bhatti, A
   Binkley, M
   Bisello, D
   Blair, RE
   Blocker, C
   Blumenfeld, B
   Bocci, A
   Bodek, A
   Boisvert, V
   Bolla, G
   Bolshov, A
   Bortoletto, D
   Boudreau, J
   Boveia, A
   Brau, B
   Brigliadori, L
   Bromberg, C
   Brubaker, E
   Budagov, J
   Budd, HS
   Budd, S
   Budroni, S
   Burkett, K
   Busetto, G
   Bussey, P
   Byrum, KL
   Cabrera, S
   Campanelli, M
   Campbell, M
   Canelli, F
   Canepa, A
   Carillo, S
   Carlsmith, D
   Carosi, R
   Casarsa, M
   Castro, A
   Catastini, P
   Cauz, D
   Cavalli-Sforza, M
   Cerri, A
   Cerrito, L
   Chang, SH
   Chen, YC
   Chertok, M
   Chiarelli, G
   Chlachidze, G
   Chlebana, F
   Cho, I
   Cho, K
   Chokheli, D
   Chou, JP
   Choudalakis, G
   Chuang, SH
   Chung, K
   Chung, WH
   Chung, YS
   Chwalek, T
   Ciljak, M
   Ciobanu, CI
   Ciocci, MA
   Clark, A
   Clark, D
   Coca, M
   Compostella, G
   Convery, ME
   Conway, J
   Cooper, B
   Copic, K
   Cordelli, M
   Cortiana, G
   Crescioli, F
   Almenar, CC
   Cuevas, J
   Culbertson, R
   Cully, JC
   Cyr, D
   DaRonco, S
   Datta, M
   D'Auria, S
   Davies, T
   D'Onofrio, M
   Dagenhart, D
   de Barbaro, P
   De Cecco, S
   Deisher, A
   De Lentdecker, G
   Dell'Orso, M
   Paoli, FD
   Demortier, L
   Deng, J
   Deninno, M
   De Pedis, D
   Derwent, PF
   Di Giovanni, GP
   Dionisi, C
   Di Ruzza, B
   Dittmann, JR
   DiTuro, P
   Dorr, C
   Donati, S
   Donega, M
   Dong, P
   Donini, J
   Dorigo, T
   Dube, S
   Efron, J
   Erbacher, R
   Erdmann, M
   Errede, D
   Errede, S
   Eusebi, R
   Fang, HC
   Farrington, S
   Fedorko, I
   Fedorko, WT
   Feild, RG
   Feindt, M
   Fernandez, JP
   Field, R
   Flanagan, G
   Foland, A
   Forrester, S
   Foster, GW
   Franklin, M
   Freeman, JC
   Furic, I
   Gallinaro, M
   Galyardt, J
   Garcia, JE
   Garberson, F
   Garfinkel, AF
   Gay, C
   Gerberich, H
   Gerdes, D
   Giagu, S
   Giannetti, P
   Gibson, A
   Gibson, K
   Gimmell, JL
   Ginsburg, C
   Giokaris, N
   Giordani, M
   Giromini, P
   Giunta, M
   Giurgiu, G
   Glagolev, V
   Glenzinski, D
   Gold, M
   Goldschmidt, N
   Goldstein, J
   Golossanov, A
   Gomez, G
   Gomez-Ceballos, G
   Goncharov, M
   Gonzalez, O
   Gorelov, I
   Goshaw, AT
   Goulianos, K
   Gresele, A
   Griffiths, M
   Grinstein, S
   Grosso-Pilcher, C
   Group, RC
   Grundler, U
   da Costa, JG
   Gunay-Unalan, Z
   Haber, C
   Hahn, K
   Hahn, SR
   Halkiadakis, E
   Hamilton, A
   Han, BY
   Han, JY
   Handler, R
   Happacher, F
   Hara, K
   Hare, M
   Harper, S
   Harr, RF
   Harris, RM
   Hartz, M
   Hatakeyama, K
   Hauser, J
   Heijboer, A
   Heinemann, B
   Heinrich, J
   Henderson, C
   Herndon, M
   Heuser, J
   Hidas, D
   Hill, CS
   Hirschbuehl, D
   Hocker, A
   Holloway, A
   Hou, S
   Houlden, M
   Hsu, SC
   Huffman, BT
   Hughes, RE
   Husemann, U
   Huston, J
   Incandela, J
   Introzzi, G
   Iori, M
   Ishizawa, Y
   Ivanov, A
   Iyutin, B
   James, E
   Jang, D
   Jayatilaka, B
   Jeans, D
   Jensen, H
   Jeon, EJ
   Jindariani, S
   Jones, M
   Joo, KK
   Jun, SY
   Jung, JE
   Junk, TR
   Kamon, T
   Karchin, PE
   Kato, Y
   Kemp, Y
   Kephart, R
   Kerzel, U
   Khotilovich, V
   Kilminster, B
   Kim, DH
   Kim, HS
   Kim, JE
   Kim, MJ
   Kim, SB
   Kim, SH
   Kim, YK
   Kimura, N
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   Yamamoto, K.
   Yamaoka, J.
   Yamashita, T.
   Yang, C.
   Yang, U. K.
   Yang, Y. C.
   Yao, W. M.
   Yeh, G. P.
   Yoh, J.
   Yorita, K.
   Yoshida, T.
   Yu, G. B.
   Yu, I.
   Yu, S. S.
   Yun, J. C.
   Zanello, L.
   Zanetti, A.
   Zaw, I.
   Zhang, X.
   Zhou, J.
   Zucchelli, S.
CA CDF Collaboration
TI Measurement of the helicity fractions of W bosons from top quark decays
   using fully reconstructed t(t)over-bar events with CDF II
SO PHYSICAL REVIEW D
LA English
DT Article
ID ELECTROMAGNETIC CALORIMETER; PARTON DISTRIBUTIONS; SEMILEPTONIC DECAYS;
   COLLIDER DETECTOR; QCD CORRECTIONS; POLARIZED W; FERMILAB; WIDTH; MODEL
AB We present a measurement of the fractions F-0 and F+ of longitudinally polarized and right-handed W bosons in top-quark decays using data collected with the CDF II detector. The data set used in the analysis corresponds to an integrated luminosity of approximately 318 pb(-1). We select t (t) over bar candidate events with one lepton, at least four jets, and missing transverse energy. Our helicity measurement uses the decay angle theta(*), which is defined as the angle between the momentum of the charged lepton in the W boson rest frame and the W momentum in the top-quark rest frame. The cos theta(*) distribution in the data is determined by full kinematic reconstruction of the t (t) over bar candidates. We find F-0=0.85(-0.22)(+0.15)(stat)+/- 0.06(syst) and F+=0.05(-0.05)(+0.11)(stat)+/- 0.03(syst), which is consistent with the standard model prediction. We set an upper limit on the fraction of right-handed W bosons of F+< 0.26 at the 95% confidence level.
C1 Univ Illinois, Urbana, IL 61801 USA.
   Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Bellaterra, Barcelona, Spain.
   Baylor Univ, Waco, TX 76798 USA.
   Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy.
   Brandeis Univ, Waltham, MA 02254 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   Univ Calif San Diego, La Jolla, CA 92093 USA.
   Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain.
   Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   Slovak Acad Sci, Inst Expt Phys, Kosice 04001, Slovakia.
   Comenius Univ, Bratislava 84248, Slovakia.
   Joint Nucl Res Inst, RU-141980 Dubna, Russia.
   Duke Univ, Durham, NC 27708 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Univ Florida, Gainesville, FL 32611 USA.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   Univ Geneva, CH-1211 Geneva 4, Switzerland.
   Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
   Harvard Univ, Cambridge, MA 02138 USA.
   Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
   Helsinki Inst Phys, FIN-00014 Helsinki, Finland.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany.
   KEK, High Energy Accelerator Phys Org, Tsukuba, Ibaraki 305, Japan.
   Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
   Sungkyunkwan Univ, Suwon 440746, South Korea.
   Seoul Natl Univ, Seoul 151742, South Korea.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   UCL, London WC1E 6BT, England.
   Ctr Invest Energet Medioambientales & Tecnol, E-28040 Madrid, Spain.
   MIT, Cambridge, MA 02139 USA.
   McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
   Univ Toronto, Toronto, ON M5S 1A7, Canada.
   Univ Michigan, Ann Arbor, MI 48109 USA.
   Michigan State Univ, E Lansing, MI 48824 USA.
   ITEP, Inst Theoret & Expt Phys, Moscow 117259, Russia.
   Univ New Mexico, Albuquerque, NM 87131 USA.
   Northwestern Univ, Evanston, IL 60208 USA.
   Ohio State Univ, Columbus, OH 43210 USA.
   Okayama Univ, Okayama 7008530, Japan.
   Osaka City Univ, Osaka 588, Japan.
   Univ Oxford, Oxford OX1 3RH, England.
   Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
   Univ Paris 06, CNRS, UMR7585,LPNHE, IN2P3, F-75252 Paris, France.
   Univ Penn, Philadelphia, PA 19104 USA.
   Scuola Normale Super Pisa, I-56127 Pisa, Italy.
   Univ Pisa, Ist Nazl Fis Nucl, Siena, Italy.
   Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   Purdue Univ, W Lafayette, IN 47907 USA.
   Univ Rochester, Rochester, NY 14627 USA.
   Rockefeller Univ, New York, NY 10021 USA.
   Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
   Rutgers State Univ, Piscataway, NJ 08855 USA.
   Texas A&M Univ, College Stn, TX 77843 USA.
   Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
   Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
   Tufts Univ, Medford, MA 02155 USA.
   Waseda Univ, Tokyo 169, Japan.
   Wayne State Univ, Detroit, MI 48201 USA.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06520 USA.
RP Abulencia, A (reprint author), Univ Illinois, Urbana, IL 61801 USA.
RI Prokoshin, Fedor/E-2795-2012; Leonardo, Nuno/M-6940-2016; Canelli,
   Florencia/O-9693-2016; Ruiz, Alberto/E-4473-2011; Robson,
   Aidan/G-1087-2011; Warburton, Andreas/N-8028-2013; Kim,
   Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; De Cecco,
   Sandro/B-1016-2012; Azzi, Patrizia/H-5404-2012; manca,
   giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Punzi,
   Giovanni/J-4947-2012; messina, andrea/C-2753-2013; Annovi,
   Alberto/G-6028-2012; Ivanov, Andrew/A-7982-2013; Scodellaro,
   Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014;
   unalan, zeynep/C-6660-2015; vilar, rocio/P-8480-2014; Cabrera Urban,
   Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese
   /I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Muelmenstaedt,
   Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Gorelov,
   Igor/J-9010-2015
OI Prokoshin, Fedor/0000-0001-6389-5399; Leonardo,
   Nuno/0000-0002-9746-4594; Canelli, Florencia/0000-0001-6361-2117;
   Gallinaro, Michele/0000-0003-1261-2277; Salamanna,
   Giuseppe/0000-0002-0861-0052; Turini, Nicola/0000-0002-9395-5230;
   Osterberg, Kenneth/0000-0003-4807-0414; Ruiz,
   Alberto/0000-0002-3639-0368; Warburton, Andreas/0000-0002-2298-7315;
   Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052;
   Annovi, Alberto/0000-0002-4649-4398; Ivanov, Andrew/0000-0002-9270-5643;
   Scodellaro, Luca/0000-0002-4974-8330; Paulini,
   Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; unalan,
   zeynep/0000-0003-2570-7611; ciocci, maria agnese /0000-0003-0002-5462;
   Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi,
   Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133
NR 52
TC 25
Z9 25
U1 1
U2 6
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 052001
DI 10.1103/PhysRevD.75.052001
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000003
ER

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   Neal, H
AF Aubert, B.
   Barate, R.
   Boutigny, D.
   Couderc, F.
   Karyotakis, Y.
   Lees, J. P.
   Poireau, V.
   Tisserand, V.
   Zghiche, A.
   Grauges, E.
   Palano, A.
   Pappagallo, M.
   Pompili, A.
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   Wang, P.
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   Ofte, I.
   Stugu, B.
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   Battaglia, M.
   Best, D.
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   Brown, D. N.
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CA BABAR Colaboration
TI Measurements of Lambda(+)(c) branching fractions of Cabibbo-suppressed
   decay modes involving Lambda and Sigma(0)
SO PHYSICAL REVIEW D
LA English
DT Article
ID BARYON DECAYS; PHYSICS
AB We measure the branching ratios of the Cabibbo-suppressed decays Lambda(+)(c)->Lambda K+ and Lambda(+)(c)->Sigma K-0(+) relative to the Cabibbo-favored decay modes Lambda(+)(c)->Lambda pi(+) and Lambda(+)(c)->Sigma(0)pi(+) to be 0.044 +/- 0.004 (stat.)+/- 0.003 (syst.) and 0.038 +/- 0.005 (stat.)+/- 0.003 (syst.), respectively. We set an upper limit on the branching ratio at the 90% confidence level for Lambda(+)(c)->Lambda K+pi(+)pi(-) of 4.1x10(-2) relative to Lambda(+)(c)->Lambda pi(+), and for Lambda(+)(c)->Sigma K-0(+)pi(+)pi(-) of 2.0x10(-2) relative to Lambda(+)(c)->Sigma(0)pi(+). We also measure the branching fraction for the Cabibbo-favored mode Lambda(+)(c)->Sigma(0)pi(+) relative to Lambda(+)(c)->Lambda pi(+) to be 0.977 +/- 0.015 (stat.)+/- 0.051 (syst.). This analysis was performed using a data sample with an integrated luminosity of 125 fb(-1) collected by the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC.
C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France.
   Univ Autonoma Barcelona, IFAE, E-08193 Barcelona, Spain.
   Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
   Ist Nazl Fis Nucl, I-70126 Bari, Italy.
   Inst High Energy Phys, Beijing 100039, Peoples R China.
   Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
   Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Berkeley, CA 94720 USA.
   Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
   Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany.
   Univ Bristol, Bristol BS8 1TL, Avon, England.
   Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
   Brunel Univ, Uxbridge UB8 3PH, Middx, England.
   Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
   Univ Calif Irvine, Irvine, CA 92697 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   Univ Calif Riverside, Riverside, CA 92521 USA.
   Univ Calif San Diego, La Jolla, CA 92093 USA.
   Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
   CALTECH, Pasadena, CA 91125 USA.
   Univ Cincinnati, Cincinnati, OH 45221 USA.
   Univ Colorado, Boulder, CO 80309 USA.
   Colorado State Univ, Ft Collins, CO 80523 USA.
   Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
   Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
   Ecole Polytech, LLR, F-91128 Palaiseau, France.
   Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
   Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
   Harvard Univ, Cambridge, MA 02139 USA.
   Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
   Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
   Univ Iowa, Iowa City, IA 52242 USA.
   Iowa State Univ, Ames, IA 50011 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
   Lab Accelerateur Lineaire, F-91898 Orsay, France.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Univ Liverpool, Liverpool L69 72E, Merseyside, England.
   Queen Mary Univ London, London E1 4NS, England.
   Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
   Univ Louisville, Louisville, KY 40292 USA.
   Univ Manchester, Manchester M13 9PL, Lancs, England.
   Univ Maryland, College Pk, MD 20742 USA.
   Univ Massachusetts, Amherst, MA 01003 USA.
   MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
   McGill Univ, Montreal, PQ H3A 2T8, Canada.
   Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
   Ist Nazl Fis Nucl, I-20133 Milan, Italy.
   Univ Mississippi, University, MS 38677 USA.
   Univ Montreal, Montreal, PQ H3C 3J7, Canada.
   Mt Holyoke Coll, S Hadley, MA 01075 USA.
   Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
   Ist Nazl Fis Nucl, I-80126 Naples, Italy.
   NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
   Univ Notre Dame, Notre Dame, IN 46556 USA.
   Ohio State Univ, Columbus, OH 43210 USA.
   Univ Oregon, Eugene, OR 97403 USA.
   Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
   Ist Nazl Fis Nucl, I-35131 Padua, Italy.
   Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
   Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
   Univ Penn, Philadelphia, PA 19104 USA.
   Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
   Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy.
   Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
   Prairie View A&M Univ, Prairie View, TX 77446 USA.
   Princeton Univ, Princeton, NJ 08544 USA.
   Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   Ist Nazl Fis Nucl, I-00185 Rome, Italy.
   Univ Rostock, D-18051 Rostock, Germany.
   Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
   CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
   Univ S Carolina, Columbia, SC 29208 USA.
   Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Stanford Univ, Stanford, CA 94305 USA.
   SUNY Albany, Albany, NY 12222 USA.
   Univ Tennessee, Knoxville, TN 37996 USA.
   Univ Texas, Austin, TX 78712 USA.
   Univ Texas, Richardson, TX 75083 USA.
   Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
   Ist Nazl Fis Nucl, I-10125 Turin, Italy.
   Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
   Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
   Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
   Vanderbilt Univ, Nashville, TN 37235 USA.
   Univ Victoria, Victoria, BC V8W 3P6, Canada.
   Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06511 USA.
RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
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   Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di
   Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016;
   Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; 
OI Adye, Tim/0000-0003-0627-5059; Lafferty, George/0000-0003-0658-4919;
   Wilson, Robert/0000-0002-8184-4103; Strube, Jan/0000-0001-7470-9301;
   Chen, Chunhui /0000-0003-1589-9955; Raven, Gerhard/0000-0002-2897-5323;
   Monge, Maria Roberta/0000-0003-1633-3195; Oyanguren,
   Arantza/0000-0002-8240-7300; Luppi, Eleonora/0000-0002-1072-5633;
   Calabrese, Roberto/0000-0002-1354-5400; Mir,
   Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
   F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
   Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
   Lusiani, Alberto/0000-0002-6876-3288; Morandin,
   Mauro/0000-0003-4708-4240; Patrignani, Claudia/0000-0002-5882-1747; de
   Sangro, Riccardo/0000-0002-3808-5455; Rotondo,
   Marcello/0000-0001-5704-6163; Neri, Nicola/0000-0002-6106-3756; Forti,
   Francesco/0000-0001-6535-7965; Saeed, Mohammad Alam/0000-0002-3529-9255;
   Negrini, Matteo/0000-0003-0101-6963; Peters, Klaus/0000-0001-7133-0662;
   Bellini, Fabio/0000-0002-2936-660X; Lusiani,
   Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982;
   Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo,
   Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826;
   Frey, Raymond/0000-0003-0341-2636; Egede, Ulrik/0000-0001-5493-0762;
   Hamel de Monchenault, Gautier/0000-0002-3872-3592; Cristinziani,
   Markus/0000-0003-3893-9171; Lanceri, Livio/0000-0001-8220-3095;
   Carpinelli, Massimo/0000-0002-8205-930X; Sciacca,
   Crisostomo/0000-0002-8412-4072
NR 10
TC 2
Z9 2
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 052002
DI 10.1103/PhysRevD.75.052002
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000004
ER

PT J
AU Aubert, B
   Bona, M
   Boutigny, D
   Couderc, F
   Karyotakis, Y
   Lees, JP
   Poireau, V
   Tisserand, V
   Zghiche, A
   Grauges, E
   Palano, A
   Chen, JC
   Qi, ND
   Rong, G
   Wang, P
   Zhu, YS
   Eigen, G
   Ofte, I
   Stugu, B
   Abrams, GS
   Battaglia, M
   Brown, DN
   Button-Shafer, J
   Cahn, RN
   Charles, E
   Gill, MS
   Groysman, Y
   Jacobsen, RG
   Kadyk, JA
   Kerth, LT
   Kolomensky, YG
   Kukartsev, G
   Pegna, DL
   Lynch, G
   Mir, LM
   Orimoto, TJ
   Pripstein, M
   Roe, NA
   Ronan, MT
   Wenzel, WA
   Sanchez, PD
   Barrett, M
   Ford, KE
   Harrison, TJ
   Hart, AJ
   Hawkes, CM
   Watson, AT
   Held, T
   Koch, H
   Lewandowski, B
   Pelizaeus, M
   Peters, K
   Schroeder, T
   Steinke, M
   Boyd, JT
   Burke, JP
   Cottingham, WN
   Walker, D
   Asgeirsson, DJ
   Cuhadar-Donszelmann, T
   Fulsom, BG
   Hearty, C
   Knecht, NS
   Mattison, TS
   McKenna, JA
   Khan, A
   Kyberd, P
   Saleem, M
   Sherwood, DJ
   Teodorescu, L
   Blinov, VE
   Bukin, AD
   Druzhinin, VP
   Golubev, VB
   Onuchin, AP
   Serednyakov, SI
   Skovpen, YI
   Solodov, EP
   Todyshev, KY
   Best, DS
   Bondioli, M
   Bruinsma, M
   Chao, M
   Curry, S
   Eschrich, I
   Kirkby, D
   Lankford, AJ
   Lund, P
   Mandelkern, M
   Roethel, W
   Stoker, DP
   Abachi, S
   Buchanan, C
   Foulkes, SD
   Gary, JW
   Long, O
   Shen, BC
   Wang, K
   Zhang, L
   Hadavand, HK
   Hill, EJ
   Paar, HP
   Rahatlou, S
   Sharma, V
   Berryhill, JW
   Campagnari, C
   Cunha, A
   Dahmes, B
   Hong, TM
   Kovalskyi, D
   Richman, JD
   Beck, TW
   Eisner, AM
   Flacco, CJ
   Heusch, CA
   Kroseberg, J
   Lockman, WS
   Nesom, G
   Schalk, T
   Schumm, BA
   Seiden, A
   Spradlin, P
   Williams, DC
   Wilson, MG
   Albert, J
   Chen, E
   Cheng, CH
   Dvoretskii, A
   Fang, F
   Hitlin, DG
   Narsky, I
   Piatenko, T
   Porter, FC
   Mancinelli, G
   Meadows, BT
   Mishra, K
   Sokoloff, MD
   Blanc, F
   Bloom, PC
   Chen, S
   Ford, WT
   Hirschauer, JF
   Kreisel, A
   Nagel, M
   Nauenberg, U
   Olivas, A
   Ruddick, WO
   Smith, JG
   Ulmer, KA
   Wagner, SR
   Zhang, J
   Chen, A
   Eckhart, EA
   Soffer, A
   Toki, WH
   Wilson, RJ
   Winklmeier, F
   Zeng, Q
   Altenburg, DD
   Feltresi, E
   Hauke, A
   Jasper, H
   Merkel, J
   Petzold, A
   Spaan, B
   Brandt, T
   Klose, V
   Lacker, HM
   Mader, WF
   Nogowski, R
   Schubert, J
   Schubert, KR
   Schwierz, R
   Sundermann, JE
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   Latour, E
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   Bettoni, D
   Bozzi, C
   Calabrese, R
   Cibinetto, G
   Luppi, E
   Negrini, M
   Petrella, A
   Piemontese, L
   Prencipe, E
   Anulli, F
   Baldini-Ferroli, R
   Calcaterra, A
   de Sangro, R
   Finocchiaro, G
   Pacetti, S
   Patteri, P
   Peruzzi, IM
   Piccolo, M
   Rama, M
   Zallo, A
   Buzzo, A
   Contri, R
   Lo Vetere, M
   Macri, MM
   Monge, MR
   Passaggio, S
   Patrignani, C
   Robutti, E
   Santroni, A
   Tosi, S
   Brandenburg, G
   Chaisanguanthum, KS
   Lee, CL
   Morii, M
   Wu, J
   Dubitzky, RS
   Marks, J
   Schenk, S
   Uwer, U
   Bard, DJ
   Bhimji, W
   Bowerman, DA
   Dauncey, PD
   Egede, U
   Flack, RL
   Nash, JA
   Nikolich, MB
   Vazquez, WP
   Behera, PK
   Chai, X
   Charles, MJ
   Mallik, U
   Meyer, NT
   Ziegler, V
   Cochran, J
   Crawley, HB
   Dong, L
   Eyges, V
   Meyer, WT
   Prell, S
   Rosenberg, EI
   Rubin, AE
   Gritsan, AV
   Denig, AG
   Fritsch, M
   Schott, G
   Arnaud, N
   Davier, M
   Grosdidier, G
   Hocker, A
   Lepeltier, V
   Le Diberder, F
   Lutz, AM
   Oyanguren, A
   Pruvot, S
   Rodier, S
   Roudeau, P
   Schune, MH
   Serrano, J
   Stocchi, A
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   Menges, W
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   Cowan, G
   Flaecher, HU
   Hopkins, DA
   Jackson, PS
   McMahon, TR
   Salvatore, F
   Wren, AC
   Brown, DN
   Davis, CL
   Allison, J
   Barlow, NR
   Barlow, RJ
   Chia, YM
   Edgar, CL
   Lafferty, GD
   Naisbit, MT
   Williams, JC
   Yi, JI
   Chen, C
   Hulsbergen, WD
   Jawahery, A
   Lae, CK
   Roberts, DA
   Simi, G
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   Blaylock, G
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AF Aubert, B.
   Bona, M.
   Boutigny, D.
   Couderc, F.
   Karyotakis, Y.
   Lees, J. P.
   Poireau, V.
   Tisserand, V.
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   Mattison, T. S.
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   Kirkby, D.
   Lankford, A. J.
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   Mandelkern, M.
   Roethel, W.
   Stoker, D. P.
   Abachi, S.
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   Foulkes, S. D.
   Gary, J. W.
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   Shen, B. C.
   Wang, K.
   Zhang, L.
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   Hill, E. J.
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   Sharma, V.
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   Campagnari, C.
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   Dahmes, B.
   Hong, T. M.
   Kovalskyi, D.
   Richman, J. D.
   Beck, T. W.
   Eisner, A. M.
   Flacco, C. J.
   Heusch, C. A.
   Kroseberg, J.
   Lockman, W. S.
   Nesom, G.
   Schalk, T.
   Schumm, B. A.
   Seiden, A.
   Spradlin, P.
   Williams, D. C.
   Wilson, M. G.
   Albert, J.
   Chen, E.
   Cheng, C. H.
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   Fang, F.
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   Mishra, K.
   Sokoloff, M. D.
   Blanc, F.
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   Chen, S.
   Ford, W. T.
   Hirschauer, J. F.
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   Nagel, M.
   Nauenberg, U.
   Olivas, A.
   Ruddick, W. O.
   Smith, J. G.
   Ulmer, K. A.
   Wagner, S. R.
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   Chen, A.
   Eckhart, E. A.
   Soffer, A.
   Toki, W. H.
   Wilson, R. J.
   Winklmeier, F.
   Zeng, Q.
   Altenburg, D. D.
   Feltresi, E.
   Hauke, A.
   Jasper, H.
   Merkel, J.
   Petzold, A.
   Spaan, B.
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   Klose, V.
   Lacker, H. M.
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   Schubert, J.
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   Petrella, A.
   Piemontese, L.
   Prencipe, E.
   Anulli, F.
   Baldini-Ferroli, R.
   Calcaterra, A.
   de Sangro, R.
   Finocchiaro, G.
   Pacetti, S.
   Patteri, P.
   Peruzzi, I. M.
   Piccolo, M.
   Rama, M.
   Zallo, A.
   Buzzo, A.
   Contri, R.
   Lo Vetere, M.
   Macri, M. M.
   Monge, M. R.
   Passaggio, S.
   Patrignani, C.
   Robutti, E.
   Santroni, A.
   Tosi, S.
   Brandenburg, G.
   Chaisanguanthum, K. S.
   Lee, C. L.
   Morii, M.
   Wu, J.
   Dubitzky, R. S.
   Marks, J.
   Schenk, S.
   Uwer, U.
   Bard, D. J.
   Bhimji, W.
   Bowerman, D. A.
   Dauncey, P. D.
   Egede, U.
   Flack, R. L.
   Nash, J. A.
   Nikolich, M. B.
   Panduro Vazquez, W.
   Behera, P. K.
   Chai, X.
   Charles, M. J.
   Mallik, U.
   Meyer, N. T.
   Ziegler, V.
   Cochran, J.
   Crawley, H. B.
   Dong, L.
   Eyges, V.
   Meyer, W. T.
   Prell, S.
   Rosenberg, E. I.
   Rubin, A. E.
   Gritsan, A. V.
   Denig, A. G.
   Fritsch, M.
   Schott, G.
   Arnaud, N.
   Davier, M.
   Grosdidier, G.
   Hocker, A.
   Lepeltier, V.
   Le Diberder, F.
   Lutz, A. M.
   Oyanguren, A.
   Pruvot, S.
   Rodier, S.
   Roudeau, P.
   Schune, M. H.
   Serrano, J.
   Stocchi, A.
   Wang, W. F.
   Wormser, G.
   Lange, D. J.
   Wright, D. M.
   Chavez, C. A.
   Forster, I. J.
   Fry, J. R.
   Gabathuler, E.
   Gamet, R.
   George, K. A.
   Hutchcroft, D. E.
   Payne, D. J.
   Schofield, K. C.
   Touramanis, C.
   Bevan, A. J.
   Clarke, C. K.
   Di Lodovico, F.
   Menges, W.
   Sacco, R.
   Cowan, G.
   Flaecher, H. U.
   Hopkins, D. A.
   Jackson, P. S.
   McMahon, T. R.
   Salvatore, F.
   Wren, A. C.
   Brown, D. N.
   Davis, C. L.
   Allison, J.
   Barlow, N. R.
   Barlow, R. J.
   Chia, Y. M.
   Edgar, C. L.
   Lafferty, G. D.
   Naisbit, M. T.
   Williams, J. C.
   Yi, J. I.
   Chen, C.
   Hulsbergen, W. D.
   Jawahery, A.
   Lae, C. K.
   Roberts, D. A.
   Simi, G.
   Tuggle, J.
   Blaylock, G.
   Dallapiccola, C.
   Hertzbach, S. S.
   Li, X.
   Moore, T. B.
   Saremi, S.
   Staengle, H.
   Cowan, R.
   Sciolla, G.
   Sekula, S. J.
   Spitznagel, M.
   Taylor, F.
   Yamamoto, R. K.
   Kim, H.
   Mclachlin, S. E.
   Patel, P. M.
   Robertson, S. H.
   Lazzaro, A.
   Lombardo, V.
   Palombo, F.
   Bauer, J. M.
   Cremaldi, L.
   Eschenburg, V.
   Godang, R.
   Kroeger, R.
   Sanders, D. A.
   Summers, D. J.
   Zhao, H. W.
   Brunet, S.
   Cote, D.
   Simard, M.
   Taras, P.
   Viaud, F. B.
   Nicholson, H.
   Cavallo, N.
   De Nardo, G.
   Fabozzi, F.
   Gatto, C.
   Lista, L.
   Monorchio, D.
   Paolucci, P.
   Piccolo, D.
   Sciacca, C.
   Baak, M. A.
   Raven, G.
   Snoek, H. L.
   Jessop, C. P.
   LoSecco, J. M.
   Benelli, G.
   Corwin, L. A.
   Gan, K. K.
   Honscheid, K.
   Hufnagel, D.
   Jackson, P. D.
   Kagan, H.
   Kass, R.
   Rahimi, A. M.
   Regensburger, J. J.
   Ter-Antonyan, R.
   Wong, Q. K.
   Blount, N. L.
   Brau, J.
   Frey, R.
   Igonkina, O.
   Kolb, J. A.
   Lu, M.
   Potter, C. T.
   Rahmat, R.
   Sinev, N. B.
   Strom, D.
   Strube, J.
   Torrence, E.
   Gaz, A.
   Margoni, M.
   Morandin, M.
   Pompili, A.
   Posocco, M.
   Rotondo, M.
   Simonetto, F.
   Stroili, R.
   Voci, C.
   Benayoun, M.
   Briand, H.
   Chauveau, J.
   David, P.
   Del Buono, L.
   de la Vaissiere, Ch.
   Hamon, O.
   Hartfiel, B. L.
   Leruste, Ph.
   Malcles, J.
   Ocariz, J.
   Roos, L.
   Therin, G.
   Gladney, L.
   Biasini, M.
   Covarelli, R.
   Angelini, C.
   Batignani, G.
   Bettarini, S.
   Bucci, F.
   Calderini, G.
   Carpinelli, M.
   Cenci, R.
   Forti, F.
   Giorgi, M. A.
   Lusiani, A.
   Marchiori, G.
   Mazur, M. A.
   Morganti, M.
   Neri, N.
   Paoloni, E.
   Rizzo, G.
   Walsh, J. J.
   Haire, M.
   Judd, D.
   Wagoner, D. E.
   Biesiada, J.
   Danielson, N.
   Elmer, P.
   Lau, Y. P.
   Lu, C.
   Olsen, J.
   Smith, A. J. S.
   Telnov, A. V.
   Bellini, F.
   Cavoto, G.
   D'Orazio, A.
   del Re, D.
   Di Marco, E.
   Faccini, R.
   Ferrarotto, F.
   Ferroni, F.
   Gaspero, M.
   Gioi, L. Li
   Mazzoni, M. A.
   Morganti, S.
   Piredda, G.
   Polci, F.
   Tehrani, F. Safai
   Voena, C.
   Ebert, M.
   Schroeder, H.
   Waldi, R.
   Adye, T.
   Franek, B.
   Olaiya, E. O.
   Ricciardi, S.
   Wilson, F. F.
   Aleksan, R.
   Emery, S.
   Gaidot, A.
   Ganzhur, S. F.
   Hamel de Monchenault, G.
   Kozanecki, W.
   Legendre, M.
   Vasseur, G.
   Yeche, Ch.
   Zito, M.
   Chen, X. R.
   Liu, H.
   Park, W.
   Purohit, M. V.
   Wilson, J. R.
   Allen, M. T.
   Aston, D.
   Bartoldus, R.
   Bechtle, P.
   Berger, N.
   Claus, R.
   Coleman, J. P.
   Convery, M. R.
   Dingfelder, J. C.
   Dorfan, J.
   Dubois-Felsmann, G. P.
   Dujmic, D.
   Dunwoodie, W.
   Field, R. C.
   Glanzman, T.
   Gowdy, S. J.
   Graham, M. T.
   Grenier, P.
   Halyo, V.
   Hast, C.
   Hryn'ova, T.
   Innes, W. R.
   Kelsey, M. H.
   Kim, P.
   Leith, D. W. G. S.
   Li, S.
   Luitz, S.
   Luth, V.
   Lynch, H. L.
   MacFarlane, D. B.
   Marsiske, H.
   Messner, R.
   Muller, D. R.
   O'Grady, C. P.
   Ozcan, V. E.
   Perazzo, A.
   Perl, M.
   Pulliam, T.
   Ratcliff, B. N.
   Roodman, A.
   Salnikov, A. A.
   Schindler, R. H.
   Schwiening, J.
   Snyder, A.
   Stelzer, J.
   Su, D.
   Sullivan, M. K.
   Suzuki, K.
   Swain, S. K.
   Thompson, J. M.
   Va'vra, J.
   van Bakel, N.
   Wagner, A. P.
   Weaver, M.
   Weinstein, A. J. R.
   Wisniewski, W. J.
   Wittgen, M.
   Wright, D. H.
   Wulsin, H. W.
   Yarritu, A. K.
   Yi, K.
   Young, C. C.
   Burchat, P. R.
   Edwards, A. J.
   Majewski, S. A.
   Petersen, B. A.
   Wilden, L.
   Ahmed, S.
   Alam, M. S.
   Bula, R.
   Ernst, J. A.
   Jain, V.
   Pan, B.
   Saeed, M. A.
   Wappler, F. R.
   Zain, S. B.
   Bugg, W.
   Krishnamurthy, M.
   Spanier, S. M.
   Eckmann, R.
   Ritchie, J. L.
   Satpathy, A.
   Schilling, C. J.
   Schwitters, R. F.
   Izen, J. M.
   Lou, X. C.
   Ye, S.
   Bianchi, F.
   Gallo, F.
   Gamba, D.
   Bomben, M.
   Bosisio, L.
   Cartaro, C.
   Cossutti, F.
   Della Ricca, G.
   Dittongo, S.
   Lanceri, L.
   Vitale, L.
   Azzolini, V.
   Lopez-March, N.
   Martinez-Vidal, F.
   Banerjee, Sw.
   Bhuyan, B.
   Brown, C. M.
   Fortin, D.
   Hamano, K.
   Kowalewski, R.
   Nugent, I. M.
   Roney, J. M.
   Sobie, R. J.
   Back, J. J.
   Harrison, P. F.
   Latham, T. E.
   Mohanty, G. B.
   Pappagallo, M.
   Band, H. R.
   Chen, X.
   Cheng, B.
   Dasu, S.
   Datta, M.
   Flood, K. T.
   Hollar, J. J.
   Kutter, P. E.
   Mellado, B.
   Mihalyi, A.
   Pan, Y.
   Pierini, M.
   Prepost, R.
   Wu, S. L.
   Yu, Z.
   Neal, H.
   Collaboration, B. A. B. A. R.
TI Measurement of B decays to phi K gamma
SO PHYSICAL REVIEW D
LA English
DT Article
ID STANDARD MODEL
AB We search for the decays B-->phi K-gamma and (B) over bar (0)->phi(K) over bar (0)gamma in a data sample of 228x10(6) B (B) over bar pairs collected at the Upsilon(4S) resonance with the BABAR detector. We measure the branching fraction B(B-->phi K-gamma)=(3.5 +/- 0.6 +/- 0.4)x10(-6) and set an upper limit B((B) over bar (0)->phi($) over bar (0)gamma)< 2.7x10(-6) at the 90% confidence level. We also measure the direct CP asymmetry in B-->phi K-gamma, A(CP)=(-26 +/- 14 +/- 5)%. The uncertainties are statistical and systematic, respectively.
C1 CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
   Univ Savoie, F-74941 Annecy Le Vieux, France.
   Univ Barcelona, Dept ECM, Fac Fis, E-08028 Barcelona, Spain.
   Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.
   Univ Bari, Ist Nazl Fis Nucl, I-70126 Bari, Italy.
   Inst High Energy Phys, Beijing 100039, Peoples R China.
   Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Berkeley, CA 94720 USA.
   Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
   Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany.
   Univ Bristol, Bristol BS8 1TL, Avon, England.
   Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
   Brunel Univ, Uxbridge UB8 3PH, Middx, England.
   Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
   Univ Calif Irvine, Irvine, CA 92697 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   Univ Calif Riverside, Riverside, CA 92521 USA.
   Univ Calif San Diego, La Jolla, CA 92093 USA.
   Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
   CALTECH, Pasadena, CA 91125 USA.
   Univ Cincinnati, Cincinnati, OH 45221 USA.
   Univ Colorado, Boulder, CO 80309 USA.
   Colorado State Univ, Ft Collins, CO 80523 USA.
   Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
   Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
   Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
   Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
   Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy.
   Univ Genoa, Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
   Harvard Univ, Cambridge, MA 02138 USA.
   Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
   Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
   Univ Iowa, Iowa City, IA 52242 USA.
   Iowa State Univ, Ames, IA 50011 USA.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
   CNRS, IN2P3, Accelerateur Lineaire Lab, F-91898 Orsay, France.
   Univ Paris 11, F-91898 Orsay, France.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   Queen Mary Univ London, London E1 4NS, England.
   Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
   Univ Louisville, Louisville, KY 40292 USA.
   Univ Manchester, Manchester M13 9PL, Lancs, England.
   Univ Maryland, College Pk, MD 20742 USA.
   Univ Massachusetts, Amherst, MA 01003 USA.
   MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
   McGill Univ, Montreal, PQ H3A 2T8, Canada.
   Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
   Univ Milan, Ist Nazl Fis Nucl, I-20133 Milan, Italy.
   Univ Mississippi, University, MS 38677 USA.
   Univ Montreal, Montreal, PQ H3C 3J7, Canada.
   Mt Holyoke Coll, S Hadley, MA 01075 USA.
   Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
   Univ Naples Federico II, Ist Nazl Fis Nucl, I-80126 Naples, Italy.
   NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
   Univ Notre Dame, Notre Dame, IN 46556 USA.
   Ohio State Univ, Columbus, OH 43210 USA.
   Univ Oregon, Eugene, OR 97403 USA.
   Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
   Univ Padua, Ist Nazl Fis Nucl, I-35131 Padua, Italy.
   Univ Paris 07, Univ Paris 06, CNRS, IN2P3,Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
   Univ Penn, Philadelphia, PA 19104 USA.
   Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
   Scuola Normale Super Pisa, Dipartimento Fis, I-56127 Pisa, Italy.
   Univ Pisa, Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
   Prairie View A&M Univ, Prairie View, TX 77446 USA.
   Princeton Univ, Princeton, NJ 08544 USA.
   Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   Univ Roma La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy.
   Univ Rostock, D-18051 Rostock, Germany.
   Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
   CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
   Univ S Carolina, Columbia, SC 29208 USA.
   Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Stanford Univ, Stanford, CA 94305 USA.
   SUNY Albany, Albany, NY 12222 USA.
   Univ Tennessee, Knoxville, TN 37996 USA.
   Univ Texas, Austin, TX 78712 USA.
   Univ Texas, Richardson, TX 75083 USA.
   Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
   Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy.
   Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy.
   Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
   Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain.
   Univ Victoria, Victoria, BC V8W 3P6, Canada.
   Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   Univ Basilicata, I-85100 Potenza, Italy.
   Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England.
   Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06511 USA.
RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France.
RI Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Luppi,
   Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; Mir,
   Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky,
   Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lusiani,
   Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani,
   Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico,
   Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Patrignani,
   Claudia/C-5223-2009; Rotondo, Marcello/I-6043-2012; Neri,
   Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Roe,
   Natalie/A-8798-2012; Lista, Luca/C-5719-2008; Peters, Klaus/C-2728-2008;
   Bellini, Fabio/D-1055-2009; Saeed, Mohammad Alam/J-7455-2012; Negrini,
   Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Oyanguren,
   Arantza/K-6454-2014; Cavallo, Nicola/F-8913-2012
OI Salvatore, Fabrizio/0000-0002-3709-1554; Wilson,
   Robert/0000-0002-8184-4103; Strube, Jan/0000-0001-7470-9301; Chen,
   Chunhui /0000-0003-1589-9955; Raven, Gerhard/0000-0002-2897-5323;
   Calcaterra, Alessandro/0000-0003-2670-4826; Frey,
   Raymond/0000-0003-0341-2636; Egede, Ulrik/0000-0001-5493-0762; Ebert,
   Marcus/0000-0002-3014-1512; Hamel de Monchenault,
   Gautier/0000-0002-3872-3592; Lanceri, Livio/0000-0001-8220-3095; Corwin,
   Luke/0000-0001-7143-3821; Carpinelli, Massimo/0000-0002-8205-930X;
   Sciacca, Crisostomo/0000-0002-8412-4072; Adye, Tim/0000-0003-0627-5059;
   Lafferty, George/0000-0003-0658-4919; Luppi,
   Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400;
   Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
   F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
   Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288;
   Morandin, Mauro/0000-0003-4708-4240; Lusiani,
   Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982;
   Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo,
   Marco/0000-0001-7601-5602; Patrignani, Claudia/0000-0002-5882-1747;
   Rotondo, Marcello/0000-0001-5704-6163; Neri, Nicola/0000-0002-6106-3756;
   Forti, Francesco/0000-0001-6535-7965; Peters, Klaus/0000-0001-7133-0662;
   Bellini, Fabio/0000-0002-2936-660X; Saeed, Mohammad
   Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge,
   Maria Roberta/0000-0003-1633-3195; Oyanguren,
   Arantza/0000-0002-8240-7300; 
NR 31
TC 5
Z9 5
U1 1
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 051102
DI 10.1103/PhysRevD.75.051102
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000002
ER

PT J
AU Barnes, T
   Li, X
AF Barnes, T.
   Li, X.
TI Associated charmonium production in low energy p(p)over-bar annihilation
SO PHYSICAL REVIEW D
LA English
DT Article
ID J/PSI
AB The QCD mechanisms underlying the exclusive strong decays and hadronic production amplitudes of charmonium remain poorly understood, despite decades of study and an increasingly detailed body of experimental information. One set of hadronic channels of special interest are those that include baryon-antibaryon states. These are being investigated experimentally at BES and CLEO-c in terms of their baryon resonance content, and are also of interest for the future PANDA experiment, in which charmonium and charmonium hybrids will be produced in p (p) over bar annihilation in association with light mesons. In this paper we develop a simple initial-state light meson emission model of the near-threshold associated charmonium production processes p (p) over bar ->pi(0)Psi, and evaluate the differential and total cross sections for these reactions in this model. (Here we consider the states Psi=eta(c), J/psi, psi('), chi(0) and chi(1).) The predicted near-threshold cross section for p (p) over bar ->pi(0)J/psi is found to be numerically similar to two previous theoretical estimates, and is roughly comparable to the (sparse) existing data for this process. The theoretical charmonium angular distributions predicted by this model are far from isotropic, which may be of interest for PANDA detector design studies.
C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
RP Barnes, T (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA.
EM tbarnes@utk.edu; xli22@utk.edu
RI Li, Xiaoguang/F-5135-2010
NR 15
TC 12
Z9 12
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 054018
DI 10.1103/PhysRevD.75.054018
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000031
ER

PT J
AU Campbell, J
   Ellis, RK
   Maltoni, F
   Willenbrock, S
AF Campbell, J.
   Ellis, R. K.
   Maltoni, F.
   Willenbrock, S.
TI Production of a W boson and two jets with one b-quark tag
SO PHYSICAL REVIEW D
LA English
DT Article
ID SINGLE TOP PRODUCTION; CROSS-SECTIONS; GLUON FUSION; FERMILAB TEVATRON;
   HADRON COLLIDERS; QCD CORRECTIONS; HEAVY QUARKS; COLLISIONS; HIGGS;
   ENERGIES
AB The production of a W boson and two jets, at least one of which contains a b quark, is a principal background to single-top production, Higgs production, and signals of new physics at hadron colliders. We present a next-to-leading-order calculation of the cross section at the Fermilab Tevatron and the CERN Large Hadron Collider. The next-to-leading-order cross section differs substantially from that at leading order, and we provide a context in which to understand this result.
C1 Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
   Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
   Catholic Univ Louvain, Inst Phys Theor, B-1348 Louvain, Belgium.
   Catholic Univ Louvain, Ctr particle Phys & Phenomenol, B-1348 Louvain, Belgium.
   Univ Illinois, Dept Phys, Urbana, IL 61801 USA.
RP Campbell, J (reprint author), Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
NR 52
TC 30
Z9 30
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 054015
DI 10.1103/PhysRevD.75.054015
PG 7
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000028
ER

PT J
AU Carena, M
   Hooper, D
   Vallinotto, A
AF Carena, Marcela
   Hooper, Dan
   Vallinotto, Alberto
TI Interplay between collider searches for supersymmetric Higgs bosons and
   direct dark matter experiments
SO PHYSICAL REVIEW D
LA English
DT Article
ID NUCLEON CROSS-SECTION; MAGNETIC-MOMENT; STANDARD MODEL; NEUTRALINO;
   MSSM; SCATTERING; HALO; PHENOMENOLOGY; CONSTRAINTS; TEVATRON
AB In this article, we explore the interplay between searches for supersymmetric particles and Higgs bosons at hadron colliders (the Tevatron and the LHC) and direct dark matter searches (such as CDMS, ZEPLIN, XENON, EDELWEISS, CRESST, WARP and others). We focus on collider searches for heavy MSSM Higgs bosons (A,H,H-+/-) and how the prospects for these searches are impacted by direct dark matter limits and vice versa. We find that the prospects of these two experimental programs are highly interrelated. A positive detection of A, H or H-+/- at the Tevatron would dramatically enhance the prospects for a near future direct discovery of neutralino dark matter. Similarly, a positive direct detection of neutralino dark matter would enhance the prospects of discovering heavy MSSM Higgs bosons at the Tevatron or the LHC. Combining the information obtained from both types of experimental searches will enable us to learn more about the nature of supersymmetry.
C1 Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
   Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   Univ Paris 06, CNRS, UMR7095, Inst Astrophys, F-75014 Paris, France.
RP Carena, M (reprint author), Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.
NR 96
TC 19
Z9 19
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 055010
DI 10.1103/PhysRevD.75.055010
PG 14
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000061
ER

PT J
AU Chen, MC
   de Gouvea, A
   Dobrescu, BA
AF Chen, Mu-Chun
   de Gouvea, Andre
   Dobrescu, Bogdan A.
TI Gauge trimming of neutrino masses
SO PHYSICAL REVIEW D
LA English
DT Article
ID FERMION MASSES; CP-VIOLATION; DARK-MATTER; SYMMETRY; MATRICES; ANARCHY;
   MODELS; ANGLES; BBN
AB We show that under a new U(1) gauge symmetry, which is nonanomalous in the presence of one "right-handed neutrino" per generation and consistent with the standard model Yukawa couplings, the most general fermion charges are determined in terms of four rational parameters. This generalization of the B-L symmetry with generation-dependent lepton charges leads to neutrino masses induced by operators of high dimensionality. Neutrino masses are thus naturally small without invoking physics at energies above the TeV scale, whether neutrinos are Majorana or Dirac fermions. This "leptocratic" model predicts the existence of light quasisterile neutrinos with consequences for cosmology, and implies that collider experiments may reveal the origin of neutrino masses.
C1 Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
   Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
   Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
RP Chen, MC (reprint author), Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA.
OI Chen, Mu-Chun/0000-0002-5749-2566
NR 69
TC 43
Z9 43
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 055009
DI 10.1103/PhysRevD.75.055009
PG 15
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000060
ER

PT J
AU Doring, M
   Hubner, K
   Kaczmarek, O
   Karsch, F
AF Doering, Matthias
   Huebner, Kay
   Kaczmarek, Olaf
   Karsch, Frithjof
TI Color screening and quark-quark interactions in finite temperature QCD
SO PHYSICAL REVIEW D
LA English
DT Article
ID PERTURBATION-THEORY; LATTICE THEORIES; CONTINUUM-LIMIT; DISSOCIATION
AB We analyze the screening of static diquark sources in 2-flavor QCD and compare results with the screening of static quark-antiquark pairs. We show that a two quark system in a fixed color representation is screened at short distances like a single quark source in the same color representation whereas at large distances the two quarks are screened independently. At high temperatures we observe that the relative strength of the interaction in diquark and quark-antiquark systems, respectively, obeys Casimir scaling. We use this result to examine the possible existence of heavy quark-quark bound states in the high temperature phase of QCD. We find support for the existence of bb states up to about 2T(c) while cc states are unlikely to be formed above T-c.
C1 Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Doring, M (reprint author), Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany.
RI Kaczmarek, Olaf/E-9932-2011
NR 30
TC 29
Z9 30
U1 1
U2 3
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 054504
DI 10.1103/PhysRevD.75.054504
PG 8
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000050
ER

PT J
AU Frankfurt, L
   Hyde, CE
   Strikman, M
   Weiss, C
AF Frankfurt, L.
   Hyde, C. E.
   Strikman, M.
   Weiss, C.
TI Generalized parton distributions and rapidity gap survival in exclusive
   diffractive pp scattering
SO PHYSICAL REVIEW D
LA English
DT Article
ID HADRON-HADRON-COLLISIONS; IMPACT PARAMETER SPACE; ELASTIC-SCATTERING;
   (P)OVER-BAR-P COLLISIONS; HIGGS PRODUCTION; LHC; NUCLEON; HERA;
   AMPLITUDES; PARTICLES
AB We study rapidity gap survival (RGS) in the production of high-mass systems (H=dijet, heavy quarkonium, Higgs boson) in double-gap exclusive diffractive pp scattering, pp -> p+(gap)+H+(gap)+p. Our approach is based on the idea that hard and soft interactions are approximately independent because they proceed over widely different time and distance scales. We implement this idea in a partonic description of proton structure, which allows for a model-independent treatment of the interplay of hard and soft interactions. The high-mass system is produced in a hard scattering process with exchange of two gluons between the protons, whose amplitude is calculable in terms of the gluon generalized parton distribution (GPD), measured in exclusive ep scattering. The hard scattering process is modified by soft spectator interactions, which we calculate neglecting correlations between hard and soft interactions (independent interaction approximation). We obtain an analytic expression for the RGS probability in terms of the phenomenological pp elastic scattering amplitude, without reference to the eikonal approximation. Contributions from inelastic intermediate states are suppressed. The onset of the black-disk limit in pp scattering at TeV energies strongly suppresses diffraction at small impact parameters and is the main factor in determining the RGS probability. Correlations between hard and soft interactions (e.g. due to scattering from the long-range pion field of the proton or due to possible short-range transverse correlations between partons) further decrease the RGS probability. We also investigate the dependence of the diffractive cross section on the transverse momenta of the final-state protons ("diffraction pattern"). By measuring this dependence one can perform detailed tests of the interplay of hard and soft interactions and even extract information about the gluon GPD in the proton. Such studies appear to be feasible with the planned forward detectors at the Large Hadron Collider.
C1 Tel Aviv Univ, Sch Phys & Astron, IL-61390 Tel Aviv, Israel.
   Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
   Univ Clermont Ferrand, Phys Corpusculaire Lab, F-63177 Aubiere, France.
   Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
   Jefferson Lab, Ctr Theory, Newport News, VA 23606 USA.
RP Frankfurt, L (reprint author), Tel Aviv Univ, Sch Phys & Astron, IL-61390 Tel Aviv, Israel.
OI Hyde, Charles/0000-0001-7282-8120
NR 68
TC 32
Z9 32
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 054009
DI 10.1103/PhysRevD.75.054009
PG 28
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000022
ER

PT J
AU Guillian, G
   Hosaka, J
   Ishihara, K
   Kameda, J
   Koshio, Y
   Minamino, A
   Mitsuda, C
   Miura, M
   Moriyama, S
   Nakahata, M
   Namba, T
   Obayashi, Y
   Ogawa, H
   Shiozawa, M
   Suzuki, Y
   Takeda, A
   Takeuchi, Y
   Yamada, S
   Higuchi, I
   Ishitsuka, M
   Kajita, T
   Kaneyuki, K
   Mitsuka, G
   Nakayama, S
   Nishino, H
   Okada, A
   Okumura, K
   Saji, C
   Takenaga, Y
   Desai, S
   Kearns, E
   Stone, JL
   Sulak, LR
   Wang, W
   Goldhaber, M
   Casper, D
   Gajewski, W
   Griskevich, J
   Kropp, WR
   Liu, DW
   Mine, S
   Smy, MB
   Sobel, HW
   Vagins, MR
   Ganezer, KS
   Hill, J
   Keig, WE
   Scholberg, K
   Walter, CW
   Ellsworth, RW
   Tasaka, S
   Kibayashi, A
   Learned, JG
   Matsuno, S
   Messier, MD
   Hayato, Y
   Ichikawa, AK
   Ishida, T
   Ishii, T
   Iwashita, T
   Kobayashi, T
   Nakadaira, T
   Nakamura, K
   Nitta, K
   Oyama, Y
   Totsuka, Y
   Suzuki, AT
   Hasegawa, M
   Kato, I
   Maesaka, H
   Nakaya, T
   Nishikawa, K
   Sato, H
   Yamamoto, S
   Yokoyama, M
   Haines, TJ
   Dazeley, S
   Hatakeyama, S
   Svoboda, R
   Blaufuss, E
   Goodman, JA
   Sullivan, GW
   Turcan, D
   Habig, A
   Fukuda, Y
   Itow, Y
   Sakuda, M
   Yoshida, M
   Kim, SB
   Yoo, J
   Okazawa, H
   Ishizuka, T
   Jung, CK
   Kato, T
   Kobayashi, K
   Malek, M
   Mauger, C
   McGrew, C
   Sharkey, E
   Yanagisawa, C
   Gando, Y
   Hasegawa, T
   Inoue, K
   Shirai, J
   Suzuki, A
   Nishijima, K
   Ishino, H
   Watanabe, Y
   Koshiba, M
   Kielczewska, D
   Berns, HG
   Gran, R
   Shiraishi, KK
   Stachyra, AL
   Washburn, K
   Wilkes, RJ
   Munakata, K
AF Guillian, G.
   Hosaka, J.
   Ishihara, K.
   Kameda, J.
   Koshio, Y.
   Minamino, A.
   Mitsuda, C.
   Miura, M.
   Moriyama, S.
   Nakahata, M.
   Namba, T.
   Obayashi, Y.
   Ogawa, H.
   Shiozawa, M.
   Suzuki, Y.
   Takeda, A.
   Takeuchi, Y.
   Yamada, S.
   Higuchi, I.
   Ishitsuka, M.
   Kajita, T.
   Kaneyuki, K.
   Mitsuka, G.
   Nakayama, S.
   Nishino, H.
   Okada, A.
   Okumura, K.
   Saji, C.
   Takenaga, Y.
   Desai, S.
   Kearns, E.
   Stone, J. L.
   Sulak, L. R.
   Wang, W.
   Goldhaber, M.
   Casper, D.
   Gajewski, W.
   Griskevich, J.
   Kropp, W. R.
   Liu, D. W.
   Mine, S.
   Smy, M. B.
   Sobel, H. W.
   Vagins, M. R.
   Ganezer, K. S.
   Hill, J.
   Keig, W. E.
   Scholberg, K.
   Walter, C. W.
   Ellsworth, R. W.
   Tasaka, S.
   Kibayashi, A.
   Learned, J. G.
   Matsuno, S.
   Messier, M. D.
   Hayato, Y.
   Ichikawa, A. K.
   Ishida, T.
   Ishii, T.
   Iwashita, T.
   Kobayashi, T.
   Nakadaira, T.
   Nakamura, K.
   Nitta, K.
   Oyama, Y.
   Totsuka, Y.
   Suzuki, A. T.
   Hasegawa, M.
   Kato, I.
   Maesaka, H.
   Nakaya, T.
   Nishikawa, K.
   Sato, H.
   Yamamoto, S.
   Yokoyama, M.
   Haines, T. J.
   Dazeley, S.
   Hatakeyama, S.
   Svoboda, R.
   Blaufuss, E.
   Goodman, J. A.
   Sullivan, G. W.
   Turcan, D.
   Habig, A.
   Fukuda, Y.
   Itow, Y.
   Sakuda, M.
   Yoshida, M.
   Kim, S. B.
   Yoo, J.
   Okazawa, H.
   Ishizuka, T.
   Jung, C. K.
   Kato, T.
   Kobayashi, K.
   Malek, M.
   Mauger, C.
   McGrew, C.
   Sharkey, E.
   Yanagisawa, C.
   Gando, Y.
   Hasegawa, T.
   Inoue, K.
   Shirai, J.
   Suzuki, A.
   Nishijima, K.
   Ishino, H.
   Watanabe, Y.
   Koshiba, M.
   Kielczewska, D.
   Berns, H. G.
   Gran, R.
   Shiraishi, K. K.
   Stachyra, A. L.
   Washburn, K.
   Wilkes, R. J.
   Munakata, K.
TI Observation of the anisotropy of 10 TeV primary cosmic ray nuclei flux
   with the Super-Kamiokande-I detector
SO PHYSICAL REVIEW D
LA English
DT Article
AB The relative sidereal variation in the arrival direction of primary cosmic ray nuclei of median energy 10 TeV was measured using downward, through-going muons detected with the Super-Kamiokande-I detector. The projection of the anisotropy map onto the right ascension axis has a first harmonic amplitude of (6.64 +/- 0.98 stat +/- 0.55 syst)x10(-4) and a phase at maximum at (33.2 degrees +/- 8.2 degrees stat +/- 5.1 degrees syst) right ascension. A sky map in equatorial coordinates indicates an excess region in the constellation of Taurus and a deficit region toward Virgo. The excess region is centered at (alpha(T),delta(T))=(75 degrees +/- 7 degrees,-5 degrees +/- 9 degrees) with a half-opening angle chi(T)=(39 +/- 7)degrees; the excess flux is (0.104 +/- 0.020)% above the isotropic expectation. The corresponding parameters for the deficit region are (alpha(V),delta(V))=(205 degrees +/- 7 degrees,5 degrees +/- 10 degrees), chi(V)=(54 +/- 7)degrees, and (-0.094 +/- 0.014)%. The data do not allow us to rule out a pure dipole form for the anisotropy (allowed at 13% confidence level); they are better described by the excess and deficit cones described above. We explored the implications under the assumption that the true anisotropy is not distorted too much by the analysis filter so that it is well-described by the observed excess and deficit cones.
C1 Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan.
   Univ Tokyo, Inst Cosm Ray Res, Res Ctr cosm Neutrinos, Gifu 2778582, Japan.
   Boston Univ, Dept Phys, Boston, MA 02215 USA.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
   Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
   Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA.
   Duke Univ, Dept Phys, Durham, NC 27708 USA.
   Gifu Univ, Dept Phys, Gifu 5011193, Japan.
   Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA.
   Indiana Univ, Dept Phys, Bloomington, IN 47405 USA.
   High Energy Accelerator Res Organizat, KEK, Tsukuba 3050801, Japan.
   Kobe Univ, Dept Phys, Hyogo 6578501, Japan.
   Kyoto Univ, Fac Sci, Kyoto 6068502, Japan.
   Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87544 USA.
   Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
   Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
   Univ Minnesota, Dept Phys, Duluth, MN 55812 USA.
   Miyagi Univ Educ, Dept Phys, Sendai, Miyagi 9800845, Japan.
   Nagoya Univ, Solar Terrestrial Environm Lab, Nagoya, Aichi 4648601, Japan.
   Okayama Univ, Okayama 7008530, Japan.
   Osaka Univ, Dept Phys, Osaka 5600043, Japan.
   Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea.
   Shinshu Univ, Matsumoto, Nagano 3908621, Japan.
   Shizuoka Seika Coll, Shizuoka 4258611, Japan.
   Shizuoka Univ, Dept Syst Engn, Shizuoka 4328561, Japan.
   SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA.
   Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan.
   Tokai Univ, Dept Phys, Kanagawa 2591292, Japan.
   Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan.
   Univ Tokyo, Tokyo 1130033, Japan.
   Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland.
RP Guillian, G (reprint author), Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada.
RI Takeuchi, Yasuo/A-4310-2011; Nakamura, Kenzo/F-7174-2010; Sobel,
   Henry/A-4369-2011; Suzuki, Yoichiro/F-7542-2010; Wilkes,
   R.Jeffrey/E-6011-2013; Kim, Soo-Bong/B-7061-2014; Yokoyama,
   Masashi/A-4458-2011; Ishino, Hirokazu/C-1994-2015; Koshio,
   Yusuke/C-2847-2015; Kibayashi, Atsuko/K-7327-2015; Obayashi,
   Yoshihisa/A-4472-2011; Yoo, Jonghee/K-8394-2016
OI Yokoyama, Masashi/0000-0003-2742-0251; Ishino,
   Hirokazu/0000-0002-8623-4080; Koshio, Yusuke/0000-0003-0437-8505; 
NR 30
TC 94
Z9 95
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 6
AR 062003
DI 10.1103/PhysRevD.75.062003
PG 17
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AW
UT WOS:000245333600009
ER

PT J
AU Ibe, M
   Kitano, R
AF Ibe, Masahiro
   Kitano, Ryuichiro
TI Gauge mediation in supergravity and gravitino dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID DYNAMICAL SUPERSYMMETRY BREAKING; GRAND UNIFICATION; POLONYI PROBLEM;
   STANDARD MODEL; INFLATION; HALOS; BARYOGENESIS; SCALE; WMAP
AB Gravitinos and hidden sector fields often cause a cosmological disaster in supersymmetric models. We find that a model with gravitational gauge mediation solves such a problem quite naturally. The mu-problem is also absent in the model. Moreover, the abundance of gravitinos explains correct amount of dark matter of the universe. The dark matter abundance can be calculated without detailed information on the thermal history of the universe such as the reheating temperature after inflation.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
RP Ibe, M (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 60
TC 32
Z9 32
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 055003
DI 10.1103/PhysRevD.75.055003
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000054
ER

PT J
AU Katsz, A
   Shadmi, Y
   Shirman, Y
AF Katsz, Andrey
   Shadmi, Yael
   Shirman, Yuri
TI Supersymmetry breaking and the radion in AdS(4) brane worlds
SO PHYSICAL REVIEW D
LA English
DT Article
AB We compute the one-loop correction to the radion potential in the Randall-Sundrum model with detuned brane tensions, with supersymmetry broken by boundary conditions. We concentrate on the small warping limit, where the one-loop correction is significant. With pure supergravity, the correction is negative, but with bulk hypermultiplets, the correction can be positive, so that the 4d curvature can be lowered, with the radion stable. We use both the KK theory, and the 4d radion effective theory for this study.
C1 Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Katsz, A (reprint author), Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.
EM andrey@physics.technion.ac.il; yshadmi@physics.technion.ac.il;
   shirman@lanl.gov
NR 29
TC 5
Z9 5
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 055008
DI 10.1103/PhysRevD.75.055008
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000059
ER

PT J
AU Linder, EV
AF Linder, Eric V.
TI Dark energy with fine redshift sampling
SO PHYSICAL REVIEW D
LA English
DT Article
ID BARYONIC ACOUSTIC-OSCILLATIONS; GALAXY POWER SPECTRUM; COSMOLOGY
AB The cosmological constant and many other possible origins for acceleration of the cosmic expansion possess variations in the dark energy properties slow on the Hubble time scale. Given that models with more rapid variation, or even phase transitions, are possible though, we examine the fineness in redshift with which cosmological probes can realistically be employed, and what constraints this could impose on dark energy behavior. In particular, we discuss various aspects of baryon acoustic oscillations, and their use to measure the Hubble parameter H(z). We find that currently considered cosmological probes have an innate resolution no finer than Delta z approximate to 0.2-0.3.
C1 Univ Calif Berkeley, Berkeley Lab, Berkeley, CA 94720 USA.
RP Linder, EV (reprint author), Univ Calif Berkeley, Berkeley Lab, Berkeley, CA 94720 USA.
NR 27
TC 3
Z9 3
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 6
AR 063502
DI 10.1103/PhysRevD.75.063502
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AW
UT WOS:000245333600015
ER

PT J
AU Link, JM
   Yager, PM
   Anjos, JC
   Bediaga, I
   Castromonte, C
   Machado, AA
   Magnin, J
   Massafferri, A
   de Miranda, JM
   Pepe, IM
   Polycarpo, E
   dos Reis, AC
   Carrillo, S
   Casimiro, E
   Cuautle, E
   Sanchez-Hernandez, A
   Uribe, C
   Vazquez, F
   Agostino, L
   Cinquini, L
   Cumalat, JP
   Frisullo, V
   O'Reilly, B
   Segoni, I
   Stenson, K
   Butler, JN
   Cheung, HWK
   Chiodini, G
   Gaines, I
   Garbincius, PH
   Garren, LA
   Gottschalk, E
   Kasper, PH
   Kreymer, AE
   Kutschke, R
   Wang, M
   Benussi, L
   Bianco, S
   Fabbri, FL
   Zallo, A
   Reyes, M
   Cawlfield, C
   Kim, DY
   Rahimi, A
   Wiss, J
   Gardner, R
   Kryemadhi, A
   Chung, YS
   Kang, JS
   Ko, BR
   Kwak, JW
   Lee, KB
   Cho, K
   Park, H
   Alimonti, G
   Barberis, S
   Boschini, M
   Cerutti, A
   D'Angelo, P
   DiCorato, M
   Dini, P
   Edera, L
   Erba, S
   Inzani, P
   Leveraro, F
   Malvezzi, S
   Menasce, D
   Mezzadri, M
   Moroni, L
   Pedrini, D
   Pontoglio, C
   Prelz, F
   Rovere, M
   Sala, S
   Davenport, TF
   Arena, V
   Boca, G
   Bonomi, G
   Gianini, G
   Liguori, G
   Pegna, DL
   Merlo, MM
   Pantea, D
   Ratti, SP
   Riccardi, C
   Vitulo, P
   Gobel, C
   Otalora, J
   Hernandez, H
   Lopez, AM
   Mendez, H
   Paris, A
   Quinones, J
   Ramirez, JE
   Zhang, Y
   Wilson, JR
   Handler, T
   Mitchell, R
   Engh, D
   Hosack, M
   Johns, WE
   Luiggi, E
   Nehring, M
   Sheldon, PD
   Vaandering, EW
   Webster, M
   Sheaff, M
AF Link, J. M.
   Yager, P. M.
   Anjos, J. C.
   Bediaga, I.
   Castromonte, C.
   Machado, A. A.
   Magnin, J.
   Massafferri, A.
   de Miranda, J. M.
   Pepe, I. M.
   Polycarpo, E.
   dos Reis, A. C.
   Carrillo, S.
   Casimiro, E.
   Cuautle, E.
   Sanchez-Hernandez, A.
   Uribe, C.
   Vazquez, F.
   Agostino, L.
   Cinquini, L.
   Cumalat, J. P.
   Frisullo, V.
   O'Reilly, B.
   Segoni, I.
   Stenson, K.
   Butler, J. N.
   Cheung, H. W. K.
   Chiodini, G.
   Gaines, I.
   Garbincius, P. H.
   Garren, L. A.
   Gottschalk, E.
   Kasper, P. H.
   Kreymer, A. E.
   Kutschke, R.
   Wang, M.
   Benussi, L.
   Bianco, S.
   Fabbri, F. L.
   Zallo, A.
   Reyes, M.
   Cawlfield, C.
   Kim, D. Y.
   Rahimi, A.
   Wiss, J.
   Gardner, R.
   Kryemadhi, A.
   Chung, Y. S.
   Kang, J. S.
   Ko, B. R.
   Kwak, J. W.
   Lee, K. B.
   Cho, K.
   Park, H.
   Alimonti, G.
   Barberis, S.
   Boschini, M.
   Cerutti, A.
   D'Angelo, P.
   DiCorato, M.
   Dini, P.
   Edera, L.
   Erba, S.
   Inzani, P.
   Leveraro, F.
   Malvezzi, S.
   Menasce, D.
   Mezzadri, M.
   Moroni, L.
   Pedrini, D.
   Pontoglio, C.
   Prelz, F.
   Rovere, M.
   Sala, S.
   Davenport, T. F., III
   Arena, V.
   Boca, G.
   Bonomi, G.
   Gianini, G.
   Liguori, G.
   Pegna, D. Lopes
   Merlo, M. M.
   Pantea, D.
   Ratti, S. P.
   Riccardi, C.
   Vitulo, P.
   Gobel, C.
   Otalora, J.
   Hernandez, H.
   Lopez, A. M.
   Mendez, H.
   Paris, A.
   Quinones, J.
   Ramirez, J. E.
   Zhang, Y.
   Wilson, J. R.
   Handler, T.
   Mitchell, R.
   Engh, D.
   Hosack, M.
   Johns, W. E.
   Luiggi, E.
   Nehring, M.
   Sheldon, P. D.
   Vaandering, E. W.
   Webster, M.
   Sheaff, M.
TI Study of the D-0 ->pi(-)pi(+)pi(-)pi(+) decay
SO PHYSICAL REVIEW D
LA English
DT Article
ID MESON DECAYS; RESONANT SUBSTRUCTURE; SPECTROMETER; FORMALISM; FOCUS;
   REST; D+
AB Using data from the FOCUS (E831) experiment at Fermilab, we present new measurements for the Cabibbo-suppressed decay mode D-0 ->pi(-)pi(+)pi(-)pi(+). We measure the branching ratio Gamma(D-0 ->pi(+)pi(-)pi(+)pi(-))/Gamma(D-0 -> K-pi(+)pi(-)pi(+))=0.0914 +/- 0.0018 +/- 0.0022. An amplitude analysis has been performed, a first for this channel, in order to determine the resonant substructure of this decay mode. The dominant component is the decay D-0 -> a(1)(1260)(+)pi(-), accounting for 60% of the decay rate. The second most dominant contribution comes from the decay D-0 ->rho(770)(0)rho(770)(0), with a fraction of 25%. We also study the a(1)(1260) line shape and resonant substructure. Using the helicity formalism for the angular distribution of the decay D-0 ->rho(770)(0)rho(770)(0), we measure a longitudinal polarization of P-L=(71 +/- 4 +/- 2)%.
C1 Univ Calif Davis, Davis, CA 95616 USA.
   Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil.
   CINVESTAV, Mexico City 07000, DF, Mexico.
   Univ Colorado, Boulder, CO 80309 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   Univ Guanajuato, Guanajuato 37150, Mexico.
   Univ Illinois, Urbana, IL 61801 USA.
   Indiana Univ, Bloomington, IN 47405 USA.
   Korea Univ, Seoul 136701, South Korea.
   Kyungpook Natl Univ, Taegu 702701, South Korea.
   Ist Nazl Fis Nucl, I-20133 Milan, Italy.
   Univ Milan, I-20122 Milan, Italy.
   Univ N Carolina, Asheville, NC 28804 USA.
   Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy.
   Ist Nazl Fis Nucl, I-27100 Pavia, Italy.
   Pontificia Univ Catolica Rio de Janeiro, BR-22453 Rio De Janeiro, Brazil.
   Univ Puerto Rico, Mayaguez, PR 00681 USA.
   Univ S Carolina, Columbia, SC 29208 USA.
   Univ Tennessee, Knoxville, TN 37996 USA.
   Vanderbilt Univ, Nashville, TN 37235 USA.
   Univ Wisconsin, Madison, WI 53706 USA.
RP Link, JM (reprint author), Univ Calif Davis, Davis, CA 95616 USA.
RI Bonomi, Germano/G-4236-2010; Kwak, Jungwon/K-8338-2012; Anjos,
   Joao/C-8335-2013; Link, Jonathan/L-2560-2013; Castromonte Flores, Cesar
   Manuel/O-6177-2014; Benussi, Luigi/O-9684-2014; Gobel Burlamaqui de
   Mello, Carla /H-4721-2016; Menasce, Dario Livio/A-2168-2016; Gianini,
   Gabriele/M-5195-2014
OI bianco, stefano/0000-0002-8300-4124; Bonomi,
   Germano/0000-0003-1618-9648; Link, Jonathan/0000-0002-1514-0650;
   Castromonte Flores, Cesar Manuel/0000-0002-9559-3704; Benussi,
   Luigi/0000-0002-2363-8889; Gobel Burlamaqui de Mello, Carla
   /0000-0003-0523-495X; Menasce, Dario Livio/0000-0002-9918-1686; Gianini,
   Gabriele/0000-0001-5186-0199
NR 45
TC 9
Z9 9
U1 0
U2 5
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 052003
DI 10.1103/PhysRevD.75.052003
PG 17
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000005
ER

PT J
AU Mori, T
   Uehara, S
   Watanabe, Y
   Abe, K
   Abe, K
   Adachi, I
   Aihara, H
   Anipko, D
   Arinstein, K
   Aulchenko, V
   Bakich, AM
   Barberio, E
   Bay, A
   Bedny, I
   Belous, K
   Bitenc, U
   Bizjak, I
   Bondar, A
   Bozek, A
   Bracko, M
   Brodzicka, J
   Browder, TE
   Chang, MC
   Chang, P
   Chen, A
   Chen, WT
   Cheon, BG
   Chistov, R
   Choi, Y
   Choi, YK
   Dalseno, J
   Dash, M
   Eidelman, S
   Epifanov, D
   Fratina, S
   Gabyshev, N
   Gershon, T
   Golob, B
   Ha, H
   Hayasaka, K
   Hayashii, H
   Hazumi, M
   Heffernan, D
   Hokuue, T
   Hoshi, Y
   Hou, S
   Hou, WS
   Iijima, T
   Ikado, K
   Imoto, A
   Inami, K
   Ishikawa, A
   Itoh, R
   Iwasaki, M
   Iwasaki, Y
   Kaji, H
   Kang, JH
   Kawai, H
   Kawasaki, T
   Khan, HR
   Kibayashi, A
   Kichimi, H
   Kim, YJ
   Korpar, S
   Krizan, P
   Krokovny, P
   Kulasiri, R
   Kumar, R
   Kuzmin, A
   Kwon, YJ
   Lee, MJ
   Lee, SE
   Lesiak, T
   Limosani, A
   Lin, SW
   Liventsev, D
   MacNaughton, J
   Majumder, G
   Mandl, F
   Matsumoto, T
   Miyake, H
   Miyata, H
   Miyazaki, Y
   Mizuk, R
   Moloney, GR
   Nagasaka, Y
   Nakao, M
   Nakazawa, H
   Natkaniec, Z
   Nishida, S
   Nitoh, O
   Noguchi, S
   Ogawa, S
   Ohshima, T
   Okuno, S
   Olsen, SL
   Ono, S
   Onuki, Y
   Ozaki, H
   Pakhlov, P
   Pakhlova, G
   Park, H
   Park, KS
   Peak, LS
   Pestotnik, R
   Piilonen, LE
   Poluektov, A
   Sahoo, H
   Sakai, Y
   Satoyama, N
   Schietinger, T
   Schneider, O
   Seidl, R
   Senyo, K
   Sevior, ME
   Shapkin, M
   Shibuya, H
   Shwartz, B
   Singh, JB
   Sokolov, A
   Somov, A
   Soni, N
   Stanic, S
   Staric, M
   Stoeck, H
   Sumiyoshi, T
   Takasaki, F
   Tamai, K
   Tanaka, M
   Taylor, GN
   Teramoto, Y
   Tian, XC
   Tikhomirov, I
   Tsuboyama, T
   Tsukamoto, T
   Uglov, T
   Uno, S
   Urquijo, P
   Usov, Y
   Varner, G
   Villa, S
   Wang, CC
   Wang, CH
   Won, E
   Xie, QL
   Yabsley, BD
   Yamaguchi, A
   Yamashita, Y
   Yamauchi, M
   Zhang, CC
   Zhang, ZP
   Zhilich, V
   Zhulanov, V
   Zupanc, A
AF Mori, T.
   Uehara, S.
   Watanabe, Y.
   Abe, K.
   Abe, K.
   Adachi, I.
   Aihara, H.
   Anipko, D.
   Arinstein, K.
   Aulchenko, V.
   Bakich, A. M.
   Barberio, E.
   Bay, A.
   Bedny, I.
   Belous, K.
   Bitenc, U.
   Bizjak, I.
   Bondar, A.
   Bozek, A.
   Bracko, M.
   Brodzicka, J.
   Browder, T. E.
   Chang, M. -C.
   Chang, P.
   Chen, A.
   Chen, W. T.
   Cheon, B. G.
   Chistov, R.
   Choi, Y.
   Choi, Y. K.
   Dalseno, J.
   Dash, M.
   Eidelman, S.
   Epifanov, D.
   Fratina, S.
   Gabyshev, N.
   Gershon, T.
   Golob, B.
   Ha, H.
   Hayasaka, K.
   Hayashii, H.
   Hazumi, M.
   Heffernan, D.
   Hokuue, T.
   Hoshi, Y.
   Hou, S.
   Hou, W. -S.
   Iijima, T.
   Ikado, K.
   Imoto, A.
   Inami, K.
   Ishikawa, A.
   Itoh, R.
   Iwasaki, M.
   Iwasaki, Y.
   Kaji, H.
   Kang, J. H.
   Kawai, H.
   Kawasaki, T.
   Khan, H. R.
   Kibayashi, A.
   Kichimi, H.
   Kim, Y. J.
   Korpar, S.
   Krizan, P.
   Krokovny, P.
   Kulasiri, R.
   Kumar, R.
   Kuzmin, A.
   Kwon, Y. -J.
   Lee, M. J.
   Lee, S. E.
   Lesiak, T.
   Limosani, A.
   Lin, S. -W.
   Liventsev, D.
   MacNaughton, J.
   Majumder, G.
   Mandl, F.
   Matsumoto, T.
   Miyake, H.
   Miyata, H.
   Miyazaki, Y.
   Mizuk, R.
   Moloney, G. R.
   Nagasaka, Y.
   Nakao, M.
   Nakazawa, H.
   Natkaniec, Z.
   Nishida, S.
   Nitoh, O.
   Noguchi, S.
   Ogawa, S.
   Ohshima, T.
   Okuno, S.
   Olsen, S. L.
   Ono, S.
   Onuki, Y.
   Ozaki, H.
   Pakhlov, P.
   Pakhlova, G.
   Park, H.
   Park, K. S.
   Peak, L. S.
   Pestotnik, R.
   Piilonen, L. E.
   Poluektov, A.
   Sahoo, H.
   Sakai, Y.
   Satoyama, N.
   Schietinger, T.
   Schneider, O.
   Seidl, R.
   Senyo, K.
   Sevior, M. E.
   Shapkin, M.
   Shibuya, H.
   Shwartz, B.
   Singh, J. B.
   Sokolov, A.
   Somov, A.
   Soni, N.
   Stanic, S.
   Staric, M.
   Stoeck, H.
   Sumiyoshi, T.
   Takasaki, F.
   Tamai, K.
   Tanaka, M.
   Taylor, G. N.
   Teramoto, Y.
   Tian, X. C.
   Tikhomirov, I.
   Tsuboyama, T.
   Tsukamoto, T.
   Uglov, T.
   Uno, S.
   Urquijo, P.
   Usov, Y.
   Varner, G.
   Villa, S.
   Wang, C. C.
   Wang, C. H.
   Won, E.
   Xie, Q. L.
   Yabsley, B. D.
   Yamaguchi, A.
   Yamashita, Y.
   Yamauchi, M.
   Zhang, C. C.
   Zhang, Z. P.
   Zhilich, V.
   Zhulanov, V.
   Zupanc, A.
CA Belle Collaboration
TI High statistics study of the f(0)(980) resonance in gamma gamma
   ->pi(+)pi(-) production
SO PHYSICAL REVIEW D
LA English
DT Article
ID KLOE DETECTOR; GAMMA-GAMMA; 4-QUARK STATES; QUARK-MODEL; MESONS; DECAY;
   PHI; COLLISIONS; PI
AB We report on a high statistics measurement of the cross section of the process gamma gamma ->pi(+)pi(-) in the pi(+)pi(-) invariant mass range 0.8 GeV/c(2)< W < 1.5 GeV/c(2) with 85.9 fb(-1) of data collected at s=10.58 GeV and 10.52 GeV with the Belle detector. A clear signal for the f(0)(980) resonance is observed. From a fit to the mass spectrum, the mass, pi(+)pi(-) and two-photon decay widths of the resonance are found to be 985.6(-1.5)(+1.2)(stat)(-1.6)(+1.1)(syst) MeV/c(2), 34.2(-11.8)(+13.9)(stat)(-2.5)(+8.8)(syst) MeV, and 205(-83)(+95)(stat)(-117)(+147)(syst) eV, respectively.
C1 Nagoya Univ, Nagoya, Aichi, Japan.
   Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
   Chiba Univ, Chiba, Japan.
   Chonnam Natl Univ, Kwangju, South Korea.
   Univ Cincinnati, Cincinnati, OH 45221 USA.
   Fu Jen Catholic Univ, Dept Phys, Taipei, Taiwan.
   Grad Univ Adv Studies, Hayama, Japan.
   Univ Hawaii, Honolulu, HI 96822 USA.
   KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan.
   Hiroshima Inst Technol, Hiroshima, Japan.
   Univ Illinois, Urbana, IL 61801 USA.
   Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China.
   Inst High Energy Phys, Vienna, Austria.
   Inst High Energy Phys, Protvino, Russia.
   Inst Theoret & Expt Phys, Moscow 117259, Russia.
   Jozef Stefan Inst, Ljubljana, Slovenia.
   Kanagawa Univ, Yokohama, Kanagawa, Japan.
   Korea Univ, Seoul 136701, South Korea.
   Kyungpook Natl Univ, Taegu 702701, South Korea.
   Swiss Fed Inst Technol, EPFL, CH-1015 Lausanne, Switzerland.
   Univ Ljubljana, Ljubljana 61000, Slovenia.
   Univ Maribor, SLO-2000 Maribor, Slovenia.
   Univ Melbourne, Parkville, Vic 3052, Australia.
   Nara Womens Univ, Nara 630, Japan.
   Natl Cent Univ, Chungli 32054, Taiwan.
   Natl United Univ, Miaoli, Taiwan.
   Natl Taiwan Univ, Dept Phys, Taipei, Taiwan.
   H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland.
   Nippon Dent Univ, Niigata, Japan.
   Niigata Univ, Niigata 95021, Japan.
   Univ Nova Gorica, Nova Gorica, Slovenia.
   Osaka City Univ, Osaka 558, Japan.
   Osaka Univ, Suita, Osaka 565, Japan.
   Panjab Univ, Chandigarh 160014, India.
   Peking Univ, Beijing 100871, Peoples R China.
   Brookhaven Natl Lab, RIKEN, Res Ctr, Upton, NY 11973 USA.
   Univ Sci & Technol China, Hefei 230026, Peoples R China.
   Seoul Natl Univ, Seoul 151, South Korea.
   Shinshu Univ, Nagano, Japan.
   Sungkyunkwan Univ, Suwon, South Korea.
   Univ Sydney, Sydney, NSW 2006, Australia.
   Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India.
   Toho Univ, Funabashi, Chiba 274, Japan.
   Tohoku Gakuin Univ, Tagajo, Miyagi, Japan.
   Tohoku Univ, Sendai, Miyagi 980, Japan.
   Univ Tokyo, Dept Phys, Tokyo 113, Japan.
   Tokyo Inst Technol, Tokyo 152, Japan.
   Tokyo Metropolitan Univ, Tokyo 158, Japan.
   Tokyo Univ Agr & Technol, Tokyo, Japan.
   Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA.
   Yonsei Univ, Seoul 120749, South Korea.
   Brookhaven Natl Lab, RIKEN, Res Ctr, Upton, NY 11973 USA.
RP Mori, T (reprint author), Nagoya Univ, Nagoya, Aichi, Japan.
RI Pakhlova, Galina/C-5378-2014; Abe, Kazuo/F-6576-2010; Aihara,
   Hiroaki/F-3854-2010; Nitoh, Osamu/C-3522-2013; Tian,
   Xinchun/L-2060-2013; Pakhlov, Pavel/K-2158-2013; Uglov,
   Timofey/B-2406-2014; Kibayashi, Atsuko/K-7327-2015; Mizuk,
   Roman/B-3751-2014; Krokovny, Pavel/G-4421-2016; Chistov,
   Ruslan/B-4893-2014
OI Pakhlova, Galina/0000-0001-7518-3022; Aihara,
   Hiroaki/0000-0002-1907-5964; Tian, Xinchun/0000-0002-6246-0470; Pakhlov,
   Pavel/0000-0001-7426-4824; Uglov, Timofey/0000-0002-4944-1830; Krokovny,
   Pavel/0000-0002-1236-4667; Chistov, Ruslan/0000-0003-1439-8390
NR 29
TC 63
Z9 63
U1 0
U2 5
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 051101
DI 10.1103/PhysRevD.75.051101
PG 6
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000001
ER

PT J
AU Owens, JF
   Huston, J
   Keppel, CE
   Kuhlmann, S
   Morfin, JG
   Olness, F
   Pumplin, J
   Stump, D
AF Owens, J. F.
   Huston, J.
   Keppel, C. E.
   Kuhlmann, S.
   Morfin, J. G.
   Olness, F.
   Pumplin, J.
   Stump, D.
TI Impact of new neutrino deep inelastic scattering and Drell-Yan data on
   large-x parton distributions
SO PHYSICAL REVIEW D
LA English
DT Article
ID DEUTERON STRUCTURE FUNCTIONS; HIGH STATISTICS MEASUREMENT; CURRENT
   CROSS-SECTIONS; CHARGED CURRENT; P(P)OVER-BAR COLLISIONS; PROTON
   COLLISIONS; DIMUON PRODUCTION; MUON SCATTERING; HEAVY QUARKS; HIGH Q2
AB New data sets have recently become available for neutrino and antineutrino deep inelastic scattering on nuclear targets and for inclusive dimuon production in pp and pd interactions. These data sets are sensitive to different combinations of parton distribution functions in the large-x region and, therefore, provide different constraints when incorporated into global parton distribution function fits. We compare and contrast the effects of these new data on parton distribution fits, with special emphasis on the effects at large x. The effects of the use of nuclear targets in the neutrino and antineutrino data sets are also investigated.
C1 Florida State Univ, Tallahassee, FL 32306 USA.
   Michigan State Univ, E Lansing, MI 48824 USA.
   Hampton Univ, Hampton, VA 23668 USA.
   Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   So Methodist Univ, Dallas, TX 75275 USA.
RP Owens, JF (reprint author), Florida State Univ, Tallahassee, FL 32306 USA.
NR 28
TC 26
Z9 26
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 054030
DI 10.1103/PhysRevD.75.054030
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000043
ER

PT J
AU Psaker, A
   Melnitchouk, W
   Radyushkin, AV
AF Psaker, A.
   Melnitchouk, W.
   Radyushkin, A. V.
TI Weak deeply virtual Compton scattering
SO PHYSICAL REVIEW D
LA English
DT Article
ID GENERALIZED PARTON DISTRIBUTIONS; EVOLUTION-EQUATIONS; SPIN STRUCTURE;
   NUCLEON SPIN; AMPLITUDE; OPERATORS; PROTON; QCD
AB We extend the analysis of the deeply virtual Compton scattering process to the weak interaction sector in the generalized Bjorken limit. The virtual Compton scattering amplitudes for the weak neutral and charged currents are calculated at the leading twist within the framework of the nonlocal light-cone expansion via coordinate space QCD string operators. Using a simple model, we estimate cross sections for neutrino scattering off the nucleon, relevant for future high-intensity neutrino beam facilities.
C1 Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
   Jefferson Lab, Newport News, VA 23606 USA.
   Joint Inst Nucl Res Dubna, Bogoliubov Lab Theoret Phys, Dubna, Russia.
RP Psaker, A (reprint author), Old Dominion Univ, Dept Phys, Norfolk, VA 23529 USA.
NR 39
TC 10
Z9 10
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 054001
DI 10.1103/PhysRevD.75.054001
PG 24
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000014
ER

PT J
AU Shu, J
   Tait, TMP
   Wagner, CEM
AF Shu, Jing
   Tait, Tim M. P.
   Wagner, Carlos E. M.
TI Baryogenesis from an earlier phase transition
SO PHYSICAL REVIEW D
LA English
DT Article
ID SUPERSYMMETRIC ELECTROWEAK BARYOGENESIS; BARYON-NUMBER;
   GRAVITATIONAL-WAVES; TRANSPORT-EQUATIONS; STANDARD MODEL; CHIRAL
   FERMIONS; FIELD-THEORY; ORDER H; UNIVERSE; MECHANISM
AB We explore the possibility that the observed baryon asymmetry of the Universe is the result of an earlier phase transition in which an extended gauge sector breaks down into the SU(3)(C)xSU(2)(L)xU(1)(Y) of the standard model. Our proto-typical example is the topflavor model, in which there is a separate SU(2)(1) for the third generation from the SU(2)(2) felt by the first two generations. We show that the breakdown of SU(2)(1)xSU(2)(2)-> SU(2)(L) results in lepton number being asymmetrically distributed throughout the three families, and provided the SM electroweak phase transition is not strongly first order, results in a nonzero baryon number, which for parameter choices that can be explored at the LHC may explain the observed baryon asymmetry.
C1 Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
   Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA.
RP Shu, J (reprint author), Univ Chicago, Kavli Inst Cosmol Phys, 5640 S Ellis Ave, Chicago, IL 60637 USA.
EM jshu@theory.uchicago.edu; tait@anl.gov; cwagner@hep.anl.gov
OI Shu, Jing/0000-0001-6569-403X
NR 64
TC 15
Z9 15
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 6
AR 063510
DI 10.1103/PhysRevD.75.063510
PG 13
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AW
UT WOS:000245333600023
ER

PT J
AU Soni, A
   Suprun, DA
AF Soni, Amarjit
   Suprun, Denis A.
TI Determination of gamma from charmless B -> M1M2 decays using U-spin
SO PHYSICAL REVIEW D
LA English
DT Article
ID B MESON DECAYS; CP VIOLATION; QCD FACTORIZATION; ASYMMETRIES; SEARCH
AB In our previous paper we applied U-spin symmetry to charmless hadronic B-+/-->(MM +/-)-M-0 decays for the purpose of precise extraction of the unitarity angle gamma. In this paper we extend our approach to neutral B-0 and B-s -> M1M2 decays. A very important feature of this method is that no assumptions regarding relative sizes of topological decay amplitudes need to be made. As a result, this method avoids an uncontrollable theoretical uncertainty that is often related to the neglect of some topological diagrams (e.g., exchange and annihilation graphs) in quark-diagrammatic approaches. In charged B-+/- decays, each of the four data sets, (PP +/-)-P-0, (PV +/-)-V-0, (VP +/-)-P-0 and (VV +/-)-V-0, with P equivalent to pseudoscalar and V equivalent to vector, can be used to obtain a value of gamma. Among neutral decays, only experimental data in the B-0, B-s -> P-P+ subsector is sufficient for a U-spin fit. Application of the U-spin approach to the current charged and neutral B decay data yields: gamma=(80(-8)(+6))degrees. In this method, which is completely data driven, in a few years we should be able to obtain a model-independent determination of gamma with an accuracy of O(few degrees).
C1 Brookhaven Natl Lab, High Energy Theory Grp, Upton, NY 11973 USA.
RP Soni, A (reprint author), Brookhaven Natl Lab, High Energy Theory Grp, Upton, NY 11973 USA.
EM soni@quark.phy.bnl.gov; suprun@quark.phy.bnl.gov
NR 87
TC 12
Z9 12
U1 0
U2 3
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2470-0010
EI 2470-0029
J9 PHYS REV D
JI Phys. Rev. D
PD MAR
PY 2007
VL 75
IS 5
AR 054006
DI 10.1103/PhysRevD.75.054006
PG 16
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 152AQ
UT WOS:000245333000019
ER

PT J
AU Bastea, S
AF Bastea, Sorin
TI Transport in a highly asymmetric binary fluid mixture
SO PHYSICAL REVIEW E
LA English
DT Article
ID HARD-SPHERE MIXTURES; DIAMETER RATIO 0.4; MOLECULAR-DYNAMICS; SHEAR
   VISCOSITY; ENSKOG THEORY; COEFFICIENTS; SUSPENSIONS; NANOFLUIDS;
   PARTICLES; EQUATION
AB We present molecular dynamics calculations of the thermal conductivity and viscosities of a model colloidal suspension with colloidal particles roughly one order of magnitude larger than the suspending liquid molecules. The results are compared with estimates based on the Enskog transport theory and effective medium theories (EMT) for thermal and viscous transport. We find, in particular, that EMT remains well applicable for predicting both the shear viscosity and thermal conductivity of such suspensions when the colloidal particles have a "typical" mass, i.e., much larger than the liquid molecules. Very light colloidal particles on the other hand yield higher thermal conductivities, in disagreement with EMT. We also discuss the consequences of these results for some proposed mechanisms for thermal conduction in nanocolloidal suspensions.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Bastea, S (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA.
EM sbastea@llnl.gov
NR 33
TC 8
Z9 8
U1 0
U2 4
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAR
PY 2007
VL 75
IS 3
AR 031201
DI 10.1103/PhysRevE.75.031201
PN 1
PG 7
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 151XL
UT WOS:000245324300032
PM 17500686
ER

PT J
AU Haney, MM
   van Wijk, K
AF Haney, Matthew M.
   van Wijk, Kasper
TI Modified Kubelka-Munk equations for localized waves inside a layered
   medium
SO PHYSICAL REVIEW E
LA English
DT Article
ID PROPAGATION; SCATTERING; DIFFUSION
AB We present a pair of coupled partial differential equations to describe the evolution of the average total intensity and intensity flux of a wave field inside a randomly layered medium. These equations represent a modification of the Kubelka-Munk equations, or radiative transfer. Our modification accounts for wave interference (e.g., localization), which is neglected in radiative transfer. We numerically solve the modified Kubelka-Munk equations and compare the results to radiative transfer as well as to simulations of the wave equation with randomly located thin layers.
C1 Sandia Natl Labs, Dept Geophys, Albuquerque, NM 87185 USA.
   Boise State Univ, Dept Geosci, Boise, ID 83725 USA.
   Boise State Univ, Phys Acoust Lab, Boise, ID 83725 USA.
RP Haney, MM (reprint author), Alaska Volcano Observ, Anchorage, AK 99508 USA.
NR 30
TC 1
Z9 1
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAR
PY 2007
VL 75
IS 3
AR 036601
DI 10.1103/PhysRevE.75.036601
PN 2
PG 8
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 151XP
UT WOS:000245324700057
PM 17500803
ER

PT J
AU Klein, W
   Gould, H
   Gulbahce, N
   Rundle, JB
   Tiampo, K
AF Klein, W.
   Gould, Harvey
   Gulbahce, Natali
   Rundle, J. B.
   Tiampo, K.
TI Structure of fluctuations near mean-field critical points and spinodals
   and its implication for physical processes
SO PHYSICAL REVIEW E
LA English
DT Article
ID KIRKWOOD-SALSBURG EQUATIONS; DEEPLY QUENCHED LIQUIDS; PHASE-TRANSITIONS;
   EARTHQUAKE FAULT; MECHANICAL MODEL; NUCLEATION; DECOMPOSITION; DROPLETS;
   SUPERSYMMETRY; CONDENSATION
AB We analyze the structure of fluctuations near critical points and spinodals in mean-field and near-mean-field systems. Unlike systems that are non-mean-field, for which a fluctuation can be represented by a single cluster in a properly chosen percolation model, a fluctuation in mean-field and near-mean-field systems consists of a large number of clusters, which we term fundamental clusters. The structure of the latter and the way that they form fluctuations has important physical consequences for phenomena as diverse as nucleation in supercooled liquids, spinodal decomposition and continuous ordering, and the statistical distribution of earthquakes. The effects due to the fundamental clusters implies that they are physical objects and not only mathematical constructs.
C1 Boston Univ, Dept Phys, Boston, MA 02215 USA.
   Boston Univ, Ctr Computat Sci, Boston, MA 02215 USA.
   Clark Univ, Dept Phys, Worcester, MA 01610 USA.
   Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   Univ Calif Davis, Ctr Computat Sci & Engn, Davis, CA 95616 USA.
   Univ Western Ontario, Earth Sci Dept, London, ON N6A 5B7, Canada.
RP Klein, W (reprint author), Boston Univ, Dept Phys, Boston, MA 02215 USA.
RI Tiampo, Kristy/I-1355-2015
OI Tiampo, Kristy/0000-0002-5500-7600
NR 74
TC 25
Z9 25
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
EI 1550-2376
J9 PHYS REV E
JI Phys. Rev. E
PD MAR
PY 2007
VL 75
IS 3
AR 031114
DI 10.1103/PhysRevE.75.031114
PN 1
PG 22
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 151XL
UT WOS:000245324300021
PM 17500675
ER

PT J
AU Liang, D
   Leheny, RL
AF Liang, Dennis
   Leheny, Robert L.
TI Smectic liquid crystals in an anisotropic random environment
SO PHYSICAL REVIEW E
LA English
DT Article
ID A PHASE-TRANSITION; X-RAY-SCATTERING; LIGHT-SCATTERING; II
   SUPERCONDUCTORS; QUENCHED DISORDER; CRITICAL-BEHAVIOR; HEAT-CAPACITY;
   GLASS PHASES; OCTYLCYANOBIPHENYL; ORDER
AB We report a high-resolution x-ray scattering study of the smectic liquid crystal octylcyanobiphenyl (8CB) confined to aligned colloidal aerosil gels. The aligned gels introduce orientational fields that promote long-range nematic order while imposing positional random fields that couple to the smectic density wave and disrupt the formation of an ordered smectic phase. At low densities of aerosil, the low-temperature scattering intensity is consistent with the presence of a topologically ordered XY Bragg glass phase that is predicted to form in response to such anisotropic quenched disorder. The observed features of the phase include an algebraic decay of the smectic correlations, which is truncated at large length scales due to the imperfect nematic order, and a power-law exponent that agrees closely with the universal value predicted for the XY Bragg glass. At higher aerosil densities, deviations from the XY Bragg glass form are apparent. At high temperature, the scattering intensity displays pretransitional dynamic fluctuations associated with the destroyed nematic to smectic-A transition. The fluctuations obey quasicritical behavior over an extended range of reduced temperature. The effective critical exponents for the correlation lengths and smectic susceptibility differ systematically from those of pure 8CB, indicating that coupling of the nematic order to the gel suppresses its role in the smectic critical behavior.
C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
RP Liang, D (reprint author), Argonne Natl Lab, Intense Pulsed Neutron Source Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 44
TC 24
Z9 24
U1 1
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAR
PY 2007
VL 75
IS 3
AR 031705
DI 10.1103/PhysRevE.75.031705
PN 1
PG 11
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 151XL
UT WOS:000245324300055
PM 17500709
ER

PT J
AU Nicolin, AI
   Jensen, MH
   Carretero-Gonzalez, R
AF Nicolin, Alexandru I.
   Jensen, Mogens H.
   Carretero-Gonzalez, R.
TI Mode locking of a driven Bose-Einstein condensate
SO PHYSICAL REVIEW E
LA English
DT Article
ID AUTORESONANT NONSTATIONARY EXCITATION; RESONANCES; SOLITONS; PLASMAS;
   GAS
AB We consider the dynamics of a driven Bose-Einstein condensate with positive scattering length. Employing an accustomed variational treatment we show that when the scattering length is time modulated as a{1+epsilon sin[omega(t)t]}, where omega(t) increases linearly in time, i.e., omega(t)=gamma t, the response frequency of the condensate locks to the eigenfrequency for small values of epsilon and gamma. A simple analytical model is presented which explains this phenomenon by mapping it to an auto-resonance, i.e., close to resonance the reduced equations describing the collective behavior of the condensate are equivalent to those of a virtual particle trapped in a finite-depth energy minimum of an effective potential.
C1 Niels Bohr Inst, DK-2100 Copenhagen O, Denmark.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   Niels Bohr Inst, DK-2100 Copenhagen O, Denmark.
   San Diego State Univ, Dept Math, Nonlinear Dynam Syst Grp, San Diego, CA 92182 USA.
   San Diego State Univ, Computat Sci Res Ctr, San Diego, CA 92182 USA.
RP Nicolin, AI (reprint author), Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark.
EM nicolin@nbi.dk; mhjensen@nbi.dk
RI Nicolin, Alexandru/C-5157-2011
NR 31
TC 12
Z9 12
U1 1
U2 4
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAR
PY 2007
VL 75
IS 3
AR 036208
DI 10.1103/PhysRevE.75.036208
PN 2
PG 5
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 151XP
UT WOS:000245324700024
PM 17500770
ER

PT J
AU Sreenivasan, S
   Cohen, R
   Lopez, E
   Toroczkai, Z
   Stanley, HE
AF Sreenivasan, Sameet
   Cohen, Reuven
   Lopez, Eduardo
   Toroczkai, Zoltan
   Stanley, H. Eugene
TI Structural bottlenecks for communication in networks
SO PHYSICAL REVIEW E
LA English
DT Article
AB We consider the effect of network topology on the optimality of packet routing which is quantified by gamma(c), the rate of packet insertion beyond which congestion and queue growth occurs. We show that for any network, there exists an absolute upper bound, expressed in terms of vertex separators, for the scaling of gamma(c) with network size N, irrespective of the static routing protocol used. We then derive an estimate to this upper bound for scale-free networks and introduce a static routing protocol, the "hub avoidance protocol," which, for large packet insertion rates, is superior to the shortest path routing protocol.
C1 Boston Univ, Ctr Polymer Studies, Boston, MA 02115 USA.
   Boston Univ, Dept Phys, Boston, MA 02115 USA.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Div Theoret, Los Alamos, NM 87545 USA.
   Boston Univ, Lab Networking & Informat Syst, Boston, MA 02215 USA.
   Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA.
   Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA.
RP Sreenivasan, S (reprint author), Boston Univ, Ctr Polymer Studies, Boston, MA 02115 USA.
RI Toroczkai, Zoltan/A-3421-2008; Cohen, Reuven/B-3875-2008; 
OI Toroczkai, Zoltan/0000-0002-6602-2849; Cohen,
   Reuven/0000-0001-8788-2189; Stanley, H./0000-0003-2800-4495
NR 18
TC 103
Z9 107
U1 1
U2 5
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1539-3755
J9 PHYS REV E
JI Phys. Rev. E
PD MAR
PY 2007
VL 75
IS 3
AR 036105
DI 10.1103/PhysRevE.75.036105
PN 2
PG 4
WC Physics, Fluids & Plasmas; Physics, Mathematical
SC Physics
GA 151XP
UT WOS:000245324700011
PM 17500757
ER

PT J
AU Anderson, OA
AF Anderson, Oscar A.
TI Accurate iterative analytic solution of the Kapchinskij-Vladimirskij
   equations for the case of a matched beam
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID ENVELOPE EQUATIONS; CHARGE
AB The well-known Kapchinskij-Vladimirskij (KV) equations are difficult to solve in general, but the problem is simplified for the matched-beam case with sufficient symmetry. We show that the interdependence of the two KV equations is eliminated, so that only one needs to be solved - a great simplification. We present an iterative method of solution which can potentially yield any desired level of accuracy. The lowest level, the well-known smooth approximation, yields simple, explicit results with good accuracy for weak or moderate focusing fields. The next level improves the accuracy for high fields; we previously showed [Part. Accel. 52, 133 ( 1996)] how to maintain a simple explicit format for the results. That paper used expansion in a small parameter to obtain results of second-level accuracy. The present paper, using straightforward iteration, obtains equations of first, second, and third levels of accuracy. For a periodic lattice with beam matched to lattice, we use the lattice and beam parameters as input and solve for phase advances and envelope functions. We find excellent agreement with numerical solutions over a wide range of beam emittances and intensities.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Anderson, OA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
NR 14
TC 3
Z9 3
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 034202
DI 10.1103/PhysRevSTAB.10.034202
PG 12
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500012
ER

PT J
AU Bhat, CM
   MacLachlan, JA
   Wu, V
AF Bhat, C. M.
   MacLachlan, J. A.
   Wu, V.
TI Use of dual rf systems to accelerate large longitudinal emittance
   intense beam in a synchrotron
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB Preserving the beam brightness and emittance during acceleration for high energy collider operation is a long-standing challenge for synchrotron injectors. Radio-frequency manipulation schemes used to produce bright bunches in these synchrotrons are often responsible for both beam loss and for the emittance dilution; the impact of such effects becomes the main obstacle to improve the collider luminosity. We have developed a scheme for acceleration of intense beam bunches of large longitudinal emittance using two rf systems. The development of such a method primarily came about to improve the overall injection to extraction efficiency of the antiproton beam in the Main Injector used for the proton-antiproton collider operation of the Tevatron at Fermilab. This technique is quite general and can be applied at other facilities. Multiparticle beam dynamics simulations of the scheme have shown that one can eliminate the beam loss and minimize the emittance growth. The scheme has been demonstrated with beam experiments in the Main Injector using the 2.5 and 53 MHz rf systems with harmonic ratio of 1:21.
C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
RP Bhat, CM (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA.
EM cbhat@fnal.gov
NR 41
TC 0
Z9 0
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 034403
DI 10.1103/PhysRevSTAB.10.034403
PG 12
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500016
ER

PT J
AU Freund, HP
   Shinn, M
   Benson, SV
AF Freund, H. P.
   Shinn, M.
   Benson, S. V.
TI Simulation of a high-average power free-electron laser oscillator
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID FEL
AB In this paper, we compare the 10 kW-Upgrade experiment at the Thomas Jefferson National Accelerator Facility in Newport News, VA, with numerical simulations using the MEDUSA code. MEDUSA is a three-dimensional FEL simulation code that is capable of treating both amplifiers and oscillators in both the steady-state and time-dependent regimes. MEDUSA employs a Gaussian modal expansion, and treats oscillators by decomposing the modal representation at the exit of the wiggler into the vacuum Gaussian modes of the resonator and then analytically determining the propagation of these vacuum resonator modes through the resonator back to the entrance of the wiggler in synchronism with the next electron bunch. The bunch length in the experiment is of the order of 380-420 fsec FWHM. The experiment operates at a wavelength of about 1.6 microns and the wiggler is 30 periods in length; hence, the slippage time is about 160 fsec. Because of this, slippage is important, and must be included in the simulation. The observed single pass gain is 65%-75% and, given the experimental uncertainties, this is in good agreement with the simulation. Multipass simulations including the cavity detuning yield an output power of 12.4 kW, which is also in good agreement with the experiment.
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   Sci Applicat Int Corp, McLean, VA 22102 USA.
RP Freund, HP (reprint author), Sci Applicat Int Corp, McLean, VA 22102 USA.
EM henry.p.freund@saic.com
NR 11
TC 1
Z9 1
U1 1
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 030702
DI 10.1103/PhysRevSTAB.10.030702
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500003
ER

PT J
AU Heifets, SA
   Chao, AW
AF Heifets, Samuel A.
   Chao, Alexander W.
TI Collective beam instability study using a correlation-moment analysis
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB A general formalism for treating simultaneously the transverse coupled-bunch and transverse coupled-mode instabilities is presented. In this approach, the equations of motion of a coupled multibunch beam are expanded to yield a system of equations involving correlation moments of the transverse and longitudinal motions. After a proper truncation, the system of equations is closed and can be solved. This approach allows us to formulate within one framework several known instability mechanisms including the single-bunch mode-coupling instability, the coupled-bunch instability, the mode-coupling instability, and the coupled-mode coupled-bunch instability as particular cases.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
RP Heifets, SA (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 034402
DI 10.1103/PhysRevSTAB.10.034402
PG 10
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500015
ER

PT J
AU Huang, ZR
   Kim, KJ
AF Huang, Zhirong
   Kim, Kwang-Je
TI Review of x-ray free-electron laser theory
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Review
ID AMPLIFIED SPONTANEOUS EMISSION; NONLINEAR HARMONIC-GENERATION;
   INITIAL-VALUE PROBLEM; HIGH-GAIN REGIME; SASE-FEL; COHERENT
   AMPLIFICATION; 3-DIMENSIONAL ANALYSIS; BETATRON OSCILLATIONS;
   STIMULATED-EMISSION; MAGNETIC-FIELD
AB High-gain free-electron lasers (FELs) are being developed as extremely bright sources for a next-generation x-ray facility. In this paper, we review the basic theory of the start-up, the exponential growth, and the saturation of the high-gain process, emphasizing the self-amplified spontaneous emission. The radiation characteristics of an x-ray FEL, including its transverse coherence, temporal characteristics, and harmonic content, are discussed. FEL performance in the presence of machine errors and undulator wakefields is examined. Various enhancement schemes through seeding and beam manipulations are summarized.
C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Argonne Natl Lab, Argonne, IL 60439 USA.
RP Huang, ZR (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
NR 114
TC 161
Z9 164
U1 7
U2 70
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 034801
DI 10.1103/PhysRevSTAB.10.034801
PG 26
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500017
ER

PT J
AU Kim, SH
   Campisi, IE
AF Kim, Sang-ho
   Campisi, Isidoro E.
TI Thermal stabilities and optimal operating parameters for the Oak Ridge
   Spallation Neutron Source superconducting linear accelerator
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB The baseline Spallation Neutron Source (SNS) accelerator will provide a 1-GeV, 1.4-MW proton beam to a mercury target for the production of neutrons. The main acceleration for the H-beam is provided by 81 superconducting cavities installed in 23 cryomodules operating at 805 MHz. The design of the superconducting linac includes a 2.1-K, 2.5-kW cryogenic plant to maintain the cavities below the helium lambda point for efficient operation at high accelerating gradients. In this paper operating conditions are analyzed rather than the design ones, which still guarantees a high gradient operation without any temperature constraint. From the analysis it appears that the SNS superconducting linac can be operated at temperatures higher than 2.1 K, a fact resulting from both the pulsed nature of the superconducting cavities, the specific configuration of the existing cryogenic plant, and the operating frequency. General conditions are also given regarding the operation of pulsed superconducting cavities resonating at different frequencies.
C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Kim, SH (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
NR 19
TC 6
Z9 6
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 032001
DI 10.1103/PhysRevSTAB.10.032001
PG 11
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500007
ER

PT J
AU Rose, DV
   Genoni, TC
   Welch, DR
   Startsev, EA
   Davidson, RC
AF Rose, D. V.
   Genoni, T. C.
   Welch, D. R.
   Startsev, E. A.
   Davidson, R. C.
TI Two-stream instability analysis for propagating charged particle beams
   with a velocity tilt
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID INERTIAL CONFINEMENT FUSION; HEAVY-ION BEAMS; ENERGY; SIMULATIONS;
   STABILITY; IGNITION
AB The linear growth of the two-stream instability for a charged-particle beam that is longitudinally compressing as it propagates through a background plasma (due to an applied velocity tilt) is examined. Detailed, 1D particle-in-cell (PIC) simulations are carried out to examine the growth of the wave packet produced by a small amplitude density perturbation in the background plasma. Recent analytic and numerical work by Startsev and Davidson [Phys. Plasmas 13, 062108 (2006)] predicted reduced linear growth rates, which are indeed observed in the PIC simulations. Here, small-signal asymptotic gain factors are determined in a semianalytic analysis and compared with the simulation results in the appropriate limits. Nonlinear effects in the PIC simulations, including wave breaking and particle trapping, are found to limit the linear growth phase of the instability for both compressing and noncompressing beams.
C1 Voss Sci LLC, Albuquerque, NM 87108 USA.
   Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Rose, DV (reprint author), Voss Sci LLC, Albuquerque, NM 87108 USA.
EM David.Rose@vosssci.com
NR 33
TC 14
Z9 14
U1 0
U2 1
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 034203
DI 10.1103/PhysRevSTAB.10.034203
PG 7
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500013
ER

PT J
AU Stygar, WA
   Cuneo, ME
   Headley, DI
   Ives, HC
   Leeper, RJ
   Mazarakis, MG
   Olson, CL
   Porter, JL
   Wagoner, TC
   Woodworth, JR
AF Stygar, W. A.
   Cuneo, M. E.
   Headley, D. I.
   Ives, H. C.
   Leeper, R. J.
   Mazarakis, M. G.
   Olson, C. L.
   Porter, J. L.
   Wagoner, T. C.
   Woodworth, J. R.
TI Architecture of petawatt-class z-pinch accelerators
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Review
ID DENSITY PHYSICS EXPERIMENTS; FUSION CAPSULE IMPLOSIONS; POST-HOLE
   CONVOLUTE; DRIVEN HOHLRAUMS; RADIATION SYMMETRY; ICF EXPERIMENTS;
   X-RAYS; ENERGY; POWER; DESIGN
AB We have developed an accelerator architecture that can serve as the basis of the design of petawatt-class z-pinch drivers. The architecture has been applied to the design of two z-pinch accelerators, each of which can be contained within a 104-m-diameter cylindrical tank. One accelerator is driven by slow (similar to 1 mu s) Marx generators, which are a mature technology but which necessitate significant pulse compression to achieve the short pulses (<< 1 mu s) required to drive z pinches. The other is powered by linear transformer drivers (LTDs), which are less mature but produce much shorter pulses than conventional Marxes. Consequently, an LTD-driven accelerator promises to be (at a given pinch current and implosion time) more efficient and reliable. The Marx-driven accelerator produces a peak electrical power of 500 TW and includes the following components: (i) 300 Marx generators that comprise a total of 1. 8 x 10(4) capacitors, store 98 MJ, and erect to 5 MV; (ii) 600 water-dielectric triplate intermediate-store transmission lines, which also serve as pulse-forming lines; (iii) 600 5-MV laser-triggered gas switches; (iv) three monolithic radial-transmission- line impedance transformers, with triplate geometries and exponential impedance profiles; (v) a 6-level 5.5-m-diameter 15-MV vacuum insulator stack; (vi) six magnetically insulated vacuum transmission lines (MITLs); and (vii) a triple-post-hole vacuum convolute that adds the output currents of the six MITLs, and delivers the combined current to a z-pinch load. The accelerator delivers an effective peak current of 52 MA to a 10-mm-length z pinch that implodes in 95 ns, and 57 MA to a pinch that implodes in 120 ns. The LTD-driven accelerator includes monolithic radial transformers and a MITL system similar to those described above, but does not include intermediate-store transmission lines, multimegavolt gas switches, or a laser trigger system. Instead, this accelerator is driven by 210 LTD modules that include a total of 1 x 10(6) capacitors and 5 x 10(5) 200-kV electrically triggered gas switches. The LTD accelerator stores 182 MJ and produces a peak electrical power of 1000 TW. The accelerator delivers an effective peak current of 68 MA to a pinch that implodes in 95 ns, and 75 MA to a pinch that implodes in 120 ns. Conceptually straightforward upgrades to these designs would deliver even higher pinch currents and faster implosions.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
   Amer Staff Aumentat Providers, Albuquerque, NM 87123 USA.
   EG&G, Albuquerque, NM 87107 USA.
   Ktech Corp Inc, Albuquerque, NM 87123 USA.
RP Stygar, WA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
NR 129
TC 98
Z9 140
U1 1
U2 13
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 030401
DI 10.1103/PhysRevSTAB.10.030401
PG 24
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500001
ER

PT J
AU Tenenbaum, P
   Bane, KLF
   Eriksson, L
   Irwin, J
   Jobe, RK
   McCormick, D
   Ng, CK
   Raubenheimer, TO
   Ross, MC
   Stupakov, G
   Walz, D
   Onoprienko, D
   Zagorodnov, I
AF Tenenbaum, P.
   Bane, K. L. F.
   Eriksson, L.
   Irwin, J.
   Jobe, R. K.
   McCormick, D.
   Ng, C. K.
   Raubenheimer, T. O.
   Ross, M. C.
   Stupakov, G.
   Walz, D.
   Onoprienko, D.
   Zagorodnov, I.
TI Direct measurement of the transverse wakefields of tapered collimators
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
AB We report on a recent set of measurements of the transverse wakefields from longitudinally tapered collimators. The measurements were performed with a low-emittance 1.19 GeV beam in the SLAC linac by inserting a collimator aperture into the beam path and reconstructing the vertical deflection of the beam as a function of the vertical position of the aperture. Each collimator in the experiment was designed to present a relatively large transverse impedance and to minimize the impedance from other contributions such as resistivity. In addition, the collimator parameters were chosen to provide some insight into the scaling of the transverse geometric wakefield as a function of the collimator's geometry. A description of the experimental apparatus and the aperture design, the method of data collection and analysis, and a comparison to theoretical and numerical predictions are presented.
C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   Brunel Univ, Uxbridge UB8 3PH, Middx, England.
   DESY, D-22607 Hamburg, Germany.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Kansas State Univ, Dept Phys, Manhattan, KS USA.
RP Tenenbaum, P (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
EM quarkpt@slac.stanford.edu
NR 19
TC 10
Z9 10
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 034401
DI 10.1103/PhysRevSTAB.10.034401
PG 8
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500014
ER

PT J
AU Terzic, B
   Pogorelov, IV
   Bohn, CL
AF Terzic, Balsa
   Pogorelov, Ilya V.
   Bohn, Courtlandt L.
TI Particle-in-cell beam dynamics simulations with a wavelet-based Poisson
   solver
SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
LA English
DT Article
ID N-BODY SIMULATIONS; ADAPTIVE MESH REFINEMENT; DISCRETENESS; ALGORITHMS;
   CODE
AB We report on a successful implementation of a three-dimensional wavelet-based solver for the Poisson equation with Dirichlet boundary conditions, optimized for use in particle-in-cell (PIC) simulations. The solver is based on the operator formulation of the conjugate gradient algorithm, for which effectively diagonal preconditioners are available in wavelet bases. Because of the recursive nature of PIC simulations, a good initial approximation to the iterative solution is always readily available, which we demonstrate to be a key advantage in terms of overall computational speed. While the Laplacian remains sparse in a wavelet representation, the wavelet-decomposed potential and density can be rendered sparse through a procedure that amounts to simultaneous compression and denoising of the data. We explain how this procedure can be carried out in a controlled and near-optimal way, and show the effect it has on the overall solver performance. After testing the solver in a stand-alone mode, we integrated it into the IMPACT-T beam dynamics particle-in-cell code and extensively benchmarked it against the IMPACT-T with the native FFT-based Poisson solver. We present and discuss these benchmarking results, as well as the results of modeling the Fermi/NICADD photoinjector using IMPACT-T with the wavelet-based solver.
C1 No Illinois Univ, Beam Phys & Astrophys Grp, De Kalb, IL 60115 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Accelerator & Fus Res, Berkeley, CA 94720 USA.
RP Terzic, B (reprint author), No Illinois Univ, Beam Phys & Astrophys Grp, De Kalb, IL 60115 USA.
NR 47
TC 6
Z9 6
U1 1
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1098-4402
J9 PHYS REV SPEC TOP-AC
JI Phys. Rev. Spec. Top.-Accel. Beams
PD MAR
PY 2007
VL 10
IS 3
AR 034201
DI 10.1103/PhysRevSTAB.10.034201
PG 22
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 158RF
UT WOS:000245810500011
ER

PT J
AU Burkert, VD
   Mokeev, VI
   Shvedunov, NV
   Boluchevskii, AA
   Battaglieri, M
   Golovach, EN
   Elouardrhiri, L
   Joo, K
   Isupov, EL
   Ishkhanov, BS
   Markov, NS
   Ripani, M
   Ricco, J
   Sapunenko, VV
   Taiuti, M
   Fedotov, GV
AF Burkert, V. D.
   Mokeev, V. I.
   Shvedunov, N. V.
   Boluchevskii, A. A.
   Battaglieri, M.
   Golovach, E. N.
   Elouardrhiri, L.
   Joo, K.
   Isupov, E. L.
   Ishkhanov, B. S.
   Markov, N. S.
   Ripani, M.
   Ricco, J.
   Sapunenko, V. V.
   Taiuti, M.
   Fedotov, G. V.
TI Isobar channels in the production of pi(+)pi(-) pairs on a proton by
   virtual photons
SO PHYSICS OF ATOMIC NUCLEI
LA English
DT Article
ID NUCLEON-RESONANCE EXCITATION; ENERGY REGION; ELECTROPRODUCTION
AB A new approach is developed for evaluating contributions of various isobar channels to the double charged-pion production in the reactions gamma(r,v)p --> pi(+)pi(-)p. This approach makes it possible to determine both respective cross sections and amplitudes for quasi-two-particle channels from a fit to data on cross sections for a three-particle final state. The diffractive anzatz, which is widely used to describe rho-meson production, is modified to meet the purpose of the description of data in the near-threshold and subthreshold regions. The cross sections for rho-meson electroproduction in the energy region of nucleon-resonance excitation are determined for the first time on the basis of the latest data of the CLAS Collaboration.
C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA.
   Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119992, Russia.
   Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
   Univ Connecticut, Dept Phys, Storrs, CT 06269 USA.
   Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia.
   Univ Genoa, I-16146 Genoa, Italy.
RP Burkert, VD (reprint author), Thomas Jefferson Natl Accelerator Facil, 12000 Jefferson Ave, Newport News, VA 23606 USA.
RI Isupov, Evgeny/J-2976-2012; Ishkhanov, Boris/E-1431-2012; 
OI Sapunenko, Vladimir/0000-0003-1877-9043
NR 18
TC 9
Z9 9
U1 0
U2 0
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 1063-7788
J9 PHYS ATOM NUCL+
JI Phys. Atom. Nuclei
PD MAR
PY 2007
VL 70
IS 3
BP 427
EP 440
DI 10.1134/S1063778807030027
PG 14
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA 156QL
UT WOS:000245664000002
ER

PT J
AU Liu, MB
   Meakin, P
   Huang, H
AF Liu, Moubin
   Meakin, Paul
   Huang, Hai
TI Dissipative particle dynamics simulation of multiphase fluid flow in
   microchannels and microchannel networks
SO PHYSICS OF FLUIDS
LA English
DT Article
ID MESOSCOPIC SIMULATION; SURFACE-TENSION; HYDRODYNAMICS; POLYMER;
   SUSPENSIONS; MECHANICS; EQUATION; SHEAR
AB Multiphase fluid motion in microchannels and microchannel networks involves complicated fluid dynamics and is fundamentally important to diverse practical engineering applications such as ink-jet printing, DNA and protein micro-/nano-arraying, and fabrication of particles and capsules for controlled release of medicines. This paper presented the simulations of multiphase fluid motion in microchannels and microchannel networks using a modified dissipative particle dynamics method that employs a new conservative particle-particle interaction combining short-range repulsive and long-range attractive interactions to simulate multiphase systems. This new conservative particle-particle interaction allows the behavior of multiphase systems consisting of gases, liquids, and solids to be simulated. Three numerical examples that are closely related to engineering applications were simulated. These examples involve multiple fluid motions in (i) a simple microchannel within two parallel plates; (ii) an inverted Y-shaped microchannel junction consisting of a vertical channel that divides into two branch channels with the same aperture; and (iii) a microchannel network. The numerical results obtained by using DPD agreed well with those from other sources, and clearly demonstrated the potential value of this DPD method for modeling and analyzing multiphase flow in microchannels and microchannel networks. (c) 2007 American Institute of Physics.
C1 Nanyang Technol Univ, Div Bioengn, Sch Chem & Biomed Engn, Singapore 639798, Singapore.
   Idaho Natl Lab, Ctr Adv Modeling & Simulat, Idaho Falls, ID 83415 USA.
   Idaho Natl Lab, Dept Modeling & Measurements, Idaho Falls, ID 83415 USA.
RP Liu, MB (reprint author), Nanyang Technol Univ, Div Bioengn, Sch Chem & Biomed Engn, 50 Nanyang Ave, Singapore 639798, Singapore.
NR 37
TC 30
Z9 32
U1 7
U2 42
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-6631
J9 PHYS FLUIDS
JI Phys. Fluids
PD MAR
PY 2007
VL 19
IS 3
AR 033302
DI 10.1063/1.2717182
PG 11
WC Mechanics; Physics, Fluids & Plasmas
SC Mechanics; Physics
GA 151VI
UT WOS:000245318500010
ER

PT J
AU Choueiri, EY
   Randolph, TM
AF Choueiri, Edgar Y.
   Randolph, Thomas M.
TI Ionization front in a high-current gas discharge
SO PHYSICS OF PLASMAS
LA English
DT Article
ID MAGNETOPLASMADYNAMIC THRUSTER; MAGNETIC-FIELD; MPD THRUSTERS; PLASMA;
   ACCELERATION; ARGON
AB Spectroscopic measurements of ion/neutral density ratio profiles are made inside the high-current, low-pressure discharge of a coaxial magnetoplasmadynamic thruster and show the existence of a thin ionization front, upstream in the discharge, that effectively ionizes the incoming gas to ionization levels above 50%. The measurements allow an estimate of the width of this ionization front to be on the order of a few millimeters. Due to the known existence of microturbulence in the plasma, which can produce suprathermal electrons, an explanation of the measurements based on the existence of a suprathermal tail in the electron energy distribution function is sought. A theoretical model for the width of the ionization front is combined with a multilevel excitation model for argon and shows that a Maxwellian electron distribution function cannot account for the small length scale of the ionization front, and that the latter is more consistent with an electron distribution function having a suprathermal population, the magnitude of which is estimated by comparing the model to the experiments. (c) 2007 American Institute of Physics.
C1 Princeton Univ, Elect Prop & Plasma Dynam Lab, Princeton, NJ 08544 USA.
   NASA, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Choueiri, EY (reprint author), Princeton Univ, Elect Prop & Plasma Dynam Lab, Princeton, NJ 08544 USA.
NR 40
TC 3
Z9 3
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAR
PY 2007
VL 14
IS 3
AR 033502
DI 10.1063/1.2646365
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 151VX
UT WOS:000245320000037
ER

PT J
AU Jenkins, TG
   Lee, WW
AF Jenkins, Thomas G.
   Lee, W. W.
TI Fluctuations and discrete particle noise in gyrokinetic simulation of
   drift waves
SO PHYSICS OF PLASMAS
LA English
DT Article
ID ALFVEN WAVES; PLASMA; TURBULENCE; INSTABILITIES; GEOMETRY; SCHEME
AB The relevance of the gyrokinetic fluctuation-dissipation theorem (FDT) to thermal equilibrium and nonequilibrium states of the gyrokinetic plasma is explored, with particular focus being given to the contribution of weakly damped normal modes to the fluctuation spectrum. It is found that the fluctuation energy carried in the normal modes exhibits the proper scaling with particle count (as predicted by the FDT in thermal equilibrium) even in the presence of drift waves, which grow linearly and attain a nonlinearly saturated steady state. This favorable scaling is preserved, and the saturation amplitude of the drift wave unaffected, for parameter regimes in which the normal modes become strongly damped and introduce a broad spectrum of discreteness-induced background noise in frequency space. (c) 2007 American Institute of Physics.
C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Jenkins, TG (reprint author), Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
NR 30
TC 5
Z9 5
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAR
PY 2007
VL 14
IS 3
AR 032307
DI 10.1063/1.2710808
PG 10
WC Physics, Fluids & Plasmas
SC Physics
GA 151VX
UT WOS:000245320000021
ER

PT J
AU Keiter, PA
   Laffite, SC
   Kyrala, GA
   Fincke, JR
   Cooley, JH
   Wilson, DC
AF Keiter, P. A.
   Laffite, S. C.
   Kyrala, G. A.
   Fincke, J. R.
   Cooley, J. H.
   Wilson, D. C.
TI A planar-geometry platform for the experimental investigation of Be jets
SO PHYSICS OF PLASMAS
LA English
DT Article
ID CAPSULE; DESIGN; NIF
AB Initial experiments were performed at the OMEGA laser [J. Soures , Phys. Plasmas 3, 2108 (1996)] to investigate the physics associated with inertial confinement fusion capsule fill tubes and holes. These experiments were performed in planar geometry and examined the hydrodynamics of a 6.7:1 aspect ratio fill-hole. X-ray radiographs at 310 eV show a jet has formed due to the interaction between the temperature drive and the beryllium (Be) washer. (c) 2007 American Institute of Physics.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Keiter, PA (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RI Keiter, Paul/J-3037-2013
NR 8
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 1070-664X
J9 PHYS PLASMAS
JI Phys. Plasmas
PD MAR
PY 2007
VL 14
IS 3
AR 034501
DI 10.1063/1.2472292
PG 3
WC Physics, Fluids & Plasmas
SC Physics
GA 151VX
UT WOS:000245320000046
ER

PT J
AU Chylek, P
AF Chylek, Petr
TI Uncertainty over weakening circulation
SO PHYSICS TODAY
LA English
DT Letter
C1 Los Alamos Natl Lab, Los Alamos, NM USA.
RP Chylek, P (reprint author), Los Alamos Natl Lab, Los Alamos, NM USA.
EM chylek@lanl.gov
NR 4
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0031-9228
J9 PHYS TODAY
JI Phys. Today
PD MAR
PY 2007
VL 60
IS 3
BP 14
EP 14
DI 10.1063/1.2718739
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 143BY
UT WOS:000244696200008
ER

PT J
AU Crabtree, GW
   Lewis, NS
AF Crabtree, George W.
   Lewis, Nathan S.
TI Solar energy conversion
SO PHYSICS TODAY
LA English
DT Article
ID CELLS; EFFICIENCY; HYDROGEN; ELECTRICITY
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   CALTECH, Beckman Inst, Mol Mat Res Ctr, Pasadena, CA 91125 USA.
RP Crabtree, GW (reprint author), Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
NR 23
TC 177
Z9 187
U1 8
U2 92
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0031-9228
EI 1945-0699
J9 PHYS TODAY
JI Phys. Today
PD MAR
PY 2007
VL 60
IS 3
BP 37
EP 42
DI 10.1063/1.2718755
PG 6
WC Physics, Multidisciplinary
SC Physics
GA 143BY
UT WOS:000244696200021
ER

PT J
AU Crease, RP
AF Crease, Robert P.
TI Critical Point Equations as icons
SO PHYSICS WORLD
LA English
DT Editorial Material
C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA.
EM rcrease@notes.cc.sunysb.edu
NR 0
TC 0
Z9 0
U1 3
U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8585
J9 PHYS WORLD
JI Phys. World
PD MAR
PY 2007
VL 20
IS 3
BP 21
EP 21
PG 1
WC Physics, Multidisciplinary
SC Physics
GA 145OZ
UT WOS:000244875700021
ER

PT J
AU Karnosky, DF
   Werner, H
   Holopainen, T
   Percy, K
   Oksanen, T
   Oksanen, E
   Heerdt, C
   Fabian, P
   Nagy, J
   Heilman, W
   Cox, R
   Nelson, N
   Matyssek, R
AF Karnosky, D. F.
   Werner, H.
   Holopainen, T.
   Percy, K.
   Oksanen, T.
   Oksanen, E.
   Heerdt, C.
   Fabian, P.
   Nagy, J.
   Heilman, W.
   Cox, R.
   Nelson, N.
   Matyssek, R.
TI Free-air exposure systems to scale up ozone research to mature trees
SO PLANT BIOLOGY
LA English
DT Review
DE free-air; greenhouse gases; ozone; mature trees; sugar maple (Acer
   saccharum); paper birch (Betula papyrifera); trembling aspen (Populus
   tremuloides); European beech (Fagus sylvatica); Norway spruce (Picea
   abies); European white birch (Betula pendula)
ID BIRCH BETULA-PENDULA; QUERCUS-RUBRA L; FAGUS-SYLVATICA; FOREST TREES;
   ADULT BEECH; NITROGEN AVAILABILITY; PARASITE DEFENSE; CANOPY TREES;
   MIXED FOREST; PICEA-ABIES
AB Because seedlings and mature trees do not necessarily respond similarly to 03 stress, it is critically important that exposure systems be developed that allow exposure of seedlings through to mature trees. Here we describe three different 03 Free-Air Exposure Systems that have been used successfully for exposure at all growth stages. These systems of spatially uniform 03 release have been shown to provide reliable 03 exposure with minimal, if any, impact on the microclimate. This methodology offers a welcome alternative to chamber studies which had severe space constraints precluding stand or community-level studies and substantial chamber effects on the microclimate and, hence physiological tree performance.
C1 Michigan Technol Univ, Sch Forest Resources & Environm Sci, Houghton, MI 49931 USA.
   Tech Univ Munich, Dept Ecol Ecoclimatol, D-85354 Freising Weihenstephan, Germany.
   Univ Kuopio, Dept Environm Sci, Ecol Lab, FIN-70211 Kuopio, Finland.
   Atlantic Forestry Ctr, NRCAN Canadian Forest Serv, Fredericton, NB E3B 5P7, Canada.
   Univ Joensuu, Dept Biol, FIN-80101 Joensuu, Finland.
   Brookhaven Natl Lab, Upton, NY 11973 USA.
   USDA Forest Serv, E Lansing, MI 48823 USA.
   USDA Forest Serv, Forestry Sci Lab, Rhinelander, WI 54501 USA.
   Tech Univ Munich, Dept Ecol Ecophysiol Plants, D-85354 Freising Weihenstephan, Germany.
RP Karnosky, DF (reprint author), Michigan Technol Univ, Sch Forest Resources & Environm Sci, 1400 Townsend Dr, Houghton, MI 49931 USA.
EM karnosky@mtu.edu
NR 55
TC 91
Z9 94
U1 1
U2 32
PU GEORG THIEME VERLAG KG
PI STUTTGART
PA RUDIGERSTR 14, D-70469 STUTTGART, GERMANY
SN 1435-8603
J9 PLANT BIOLOGY
JI Plant Biol.
PD MAR
PY 2007
VL 9
IS 2
BP 181
EP 190
DI 10.1055/s-2006-955915
PG 10
WC Plant Sciences
SC Plant Sciences
GA 150WX
UT WOS:000245251400002
PM 17357013
ER

PT J
AU Ainsworth, EA
   Rogers, A
AF Ainsworth, Elizabeth A.
   Rogers, Alistair
TI The response of photosynthesis and stomatal conductance to rising [CO2]:
   mechanisms and environmental interactions
SO PLANT CELL AND ENVIRONMENT
LA English
DT Review
DE acclimation; elevated carbon dioxide; free-air; CO2 enrichment (FACE);
   global change; Rubisco
ID ELEVATED ATMOSPHERIC CO2; CARBON-DIOXIDE ENRICHMENT; SOURCE-SINK
   RELATIONS; LOLIUM-PERENNE L.; GUARD-CELLS; LONG-TERM;
   RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE; SIGNAL-TRANSDUCTION; C-4
   PHOTOSYNTHESIS; PARTIAL-PRESSURE
AB This review summarizes current understanding of the mechanisms that underlie the response of photosynthesis and stomatal conductance to elevated carbon dioxide concentration ([CO2]), and examines how downstream processes and environmental constraints modulate these two fundamental responses. The results from free-air CO2 enrichment (FACE) experiments were summarized via meta-analysis to quantify the mean responses of stomatal and photosynthetic parameters to elevated [CO2]. Elevation of [CO2] in FACE experiments reduced stomatal conductance by 22%, yet, this reduction was not associated with a similar change in stomatal density. Elevated [CO2] stimulated light-saturated photosynthesis (A(sat)) in C-3 plants grown in FACE by an average of 31%. However, the magnitude of the increase in A(sat) varied with functional group and environment. Functional groups with ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco)-limited photosynthesis at elevated [CO2] had greater potential for increases in A(sat) than those where photosynthesis became ribulose-1,5-bisphosphate (RubP)-limited at elevated [CO2]. Both nitrogen supply and sink capacity modulated the response of photosynthesis to elevated [CO2] through their impact on the acclimation of carboxylation capacity. Increased understanding of the molecular and biochemical mechanisms by which plants respond to elevated [CO2], and the feedback of environmental factors upon them, will improve our ability to predict ecosystem responses to rising [CO2] and increase our potential to adapt crops and managed ecosystems to future atmospheric [CO2].
C1 Univ Illinois, USDA ARS, Photosynth Res Unit, Urbana, IL 61801 USA.
   Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA.
   Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA.
   Univ Illinois, Dept Crop Sci, Urbana, IL 61801 USA.
RP Ainsworth, EA (reprint author), Univ Illinois, USDA ARS, Photosynth Res Unit, 147 ERML,1201 W Gregory Dr, Urbana, IL 61801 USA.
EM ainswort@uiuc.edu
RI Rogers, Alistair/E-1177-2011
OI Rogers, Alistair/0000-0001-9262-7430
NR 118
TC 675
Z9 717
U1 60
U2 479
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0140-7791
J9 PLANT CELL ENVIRON
JI Plant Cell Environ.
PD MAR
PY 2007
VL 30
IS 3
BP 258
EP 270
DI 10.1111/j.1365-3040.2007.01641.x
PG 13
WC Plant Sciences
SC Plant Sciences
GA 131MG
UT WOS:000243872500002
PM 17263773
ER

PT J
AU Sung, DY
   Lee, D
   Harris, H
   Raab, A
   Feldmann, J
   Meharg, A
   Kumabe, B
   Komives, EA
   Schroeder, JI
AF Sung, Dong-Yul
   Lee, David
   Harris, Hugh
   Raab, Andrea
   Feldmann, Jorg
   Meharg, Andrew
   Kumabe, Bryan
   Komives, Elizabeth A.
   Schroeder, Julian I.
TI Identification of an arsenic tolerant double mutant with a
   thiol-mediated component and increased arsenic tolerance in phyA mutants
SO PLANT JOURNAL
LA English
DT Article
DE arsenate; phytochrome A; phytochelatins; thiols; bioremediation;
   Arabidopsis
ID GAMMA-GLUTAMYLCYSTEINE SYNTHETASE; ARABIDOPSIS-THALIANA; PHYTOCHELATIN
   SYNTHASE; PHYTOCHROME-A; PHOSPHATE-UPTAKE; HOLCUS-LANATUS;
   DRINKING-WATER; CADMIUM; PLANTS; CHLAMYDOMONAS
AB A genetic screen was performed to isolate mutants showing increased arsenic tolerance using an Arabidopsis thaliana population of activation tagged lines. The most arsenic-resistant mutant shows increased arsenate and arsenite tolerance. Genetic analyses of the mutant indicate that the mutant contains two loci that contribute to arsenic tolerance, designated ars4 and ars5. The ars4ars5 double mutant contains a single T-DNA insertion, ars4, which co-segregates with arsenic tolerance and is inserted in the Phytochrome A (PHYA) gene, strongly reducing the expression of PHYA. When grown under far-red light conditions ars4ars5 shows the same elongated hypocotyl phenotype as the previously described strong phyA-211 allele. Three independent phyA alleles, ars4, phyA-211 and a new T-DNA insertion allele (phyA-t) show increased tolerance to arsenate, although to a lesser degree than the ars4ars5 double mutant. Analyses of the ars5 single mutant show that ars5 exhibits stronger arsenic tolerance than ars4, and that ars5 is not linked to ars4. Arsenic tolerance assays with phyB-9 and phot1/phot2 mutants show that these photoreceptor mutants do not exhibit phyA-like arsenic tolerance. Fluorescence HPLC analyses show that elevated levels of phytochelatins were not detected in ars4, ars5 or ars4ars5, however increases in the thiols cysteine, gamma-glutamylcysteine and glutathione were observed. Compared with wild type, the total thiol levels in ars4, ars5 and ars4ars5 mutants were increased up to 80% with combined buthionine sulfoximine and arsenic treatments, suggesting the enhancement of mechanisms that mediate thiol synthesis in the mutants. The presented findings show that PHYA negatively regulates a pathway conferring arsenic tolerance, and that an enhanced thiol synthesis mechanism contributes to the arsenic tolerance of ars4ars5.
C1 Univ Calif San Diego, Div Biol Sci, Cell & Dev Biol Sect, La Jolla, CA 92093 USA.
   Univ Calif San Diego, Ctr Mol Genet, La Jolla, CA 92093 USA.
   Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA.
   Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA.
   Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia.
   Univ Aberdeen, Dept Chem, Aberdeen AB24 3UU, Scotland.
   Univ Aberdeen, Sch Biol Sci, Aberdeen AB24 3UU, Scotland.
RP Schroeder, JI (reprint author), Univ Calif San Diego, Div Biol Sci, Cell & Dev Biol Sect, 9500 Gilman Dr, La Jolla, CA 92093 USA.
EM julian@biomail.ucsd.edu
RI Harris, Hugh/A-4983-2008; Feldmann, Jorg/B-8079-2011; Meharg,
   Andrew/F-8182-2014; 
OI Meharg, Andrew/0000-0003-2019-0449; Schroeder,
   Julian/0000-0002-3283-5972; Feldmann, Joerg/0000-0002-0524-8254; Harris,
   Hugh/0000-0002-3472-8628
FU NIEHS NIH HHS [P42 ES010337]; PHS HHS [1 P42 ESI0337]
NR 46
TC 20
Z9 22
U1 2
U2 5
PU BLACKWELL PUBLISHING
PI OXFORD
PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND
SN 0960-7412
J9 PLANT J
JI Plant J.
PD MAR
PY 2007
VL 49
IS 6
BP 1064
EP 1075
DI 10.1111/j.1365-313X.2006.03018.x
PG 12
WC Plant Sciences
SC Plant Sciences
GA 141JX
UT WOS:000244575700010
PM 17335514
ER

PT J
AU Takei, N
   Nakamura, Y
   Ushigome, M
   Suzuki, T
   Aiba, N
   Takechi, M
   Tobita, K
   Takase, Y
   Fukuyama, A
   Jardin, SC
AF Takei, N.
   Nakamura, Y.
   Ushigome, M.
   Suzuki, T.
   Aiba, N.
   Takechi, M.
   Tobita, K.
   Takase, Y.
   Fukuyama, A.
   Jardin, S. C.
TI Intermittent beta collapse after NBCD turn-off in JT-60U fully
   non-inductive reversed shear discharges
SO PLASMA PHYSICS AND CONTROLLED FUSION
LA English
DT Article
ID IMPROVED CONFINEMENT; TRANSPORT BARRIER; L-MODE; TOKAMAK; PLASMAS;
   PERFORMANCE; SIMULATION; TFTR
AB Non-disruptive beta collapses with a regular intermittency have been observed after a forced turn-off of neutral beam current drive (NBCD) in JT-60U fully non-inductive, reversed shear (RS) discharges. Self-consistent transport simulations with improved core confinement have first clarified that the redistribution of 'return current' induced after the NBCD turn-off lowers the safety factor of magnetic shear reversal, q(min). Linear MHD stability analysis has also revealed that this lowering of safety factor leads to n = 1 kink-ballooning instability with the modes localized around the internal transport barrier (ITB) of higher q(min) (similar to 6) discharges. It was also pointed out that an increase in the bootstrap current under continuous NB heating can lead to ITB reconstruction and thus causes subsequent beta collapses.
C1 Japan Atom Energy Agcy, Ibaraki 3110193, Japan.
   Univ Tokyo, Chiba 2778561, Japan.
   Kyoto Univ, Kyoto 6068317, Japan.
   Princeton Plasma Phys Lab, Princeton, NJ 08543 USA.
RP Takei, N (reprint author), Japan Atom Energy Agcy, Ibaraki 3110193, Japan.
RI Jardin, Stephen/E-9392-2010
NR 19
TC 4
Z9 4
U1 1
U2 3
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0741-3335
J9 PLASMA PHYS CONTR F
JI Plasma Phys. Control. Fusion
PD MAR
PY 2007
VL 49
IS 3
BP 335
EP 345
DI 10.1088/0741-3335/49/3/011
PG 11
WC Physics, Fluids & Plasmas
SC Physics
GA 153LN
UT WOS:000245436600012
ER

PT J
AU Roberto, F
   Watkins, M
   Grogan, D
   Young, M
AF Roberto, Frank
   Watkins, Maryann
   Grogan, Dennis
   Young, Mark
TI Initial characterization of a 32-kb plasmid from a yellowstone strain of
   sulfolobus islandicus.
SO PLASMID
LA English
DT Meeting Abstract
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
   Univ Idaho, Moscow, ID 83844 USA.
   Univ Cincinnati, Cincinnati, OH 45221 USA.
   Montana State Univ, Bozeman, MT 59714 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0147-619X
J9 PLASMID
JI Plasmid
PD MAR
PY 2007
VL 57
IS 2
BP 226
EP 227
PG 2
WC Genetics & Heredity; Microbiology
SC Genetics & Heredity; Microbiology
GA 152PM
UT WOS:000245374100105
ER

PT J
AU Wong, R
   Land, M
   Han, CS
AF Wong, Robin
   Land, Miriam
   Han, Cliff S.
TI The story told by 100 shotgun sequenced microbial genomes - Why the
   clonability for genomes are different.
SO PLASMID
LA English
DT Meeting Abstract
C1 DOE Joint Genome Inst, Los Alamos Natl Lab, Los Alamos, NM USA.
RI Land, Miriam/A-6200-2011
OI Land, Miriam/0000-0001-7102-0031
NR 0
TC 0
Z9 0
U1 1
U2 2
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0147-619X
J9 PLASMID
JI Plasmid
PD MAR
PY 2007
VL 57
IS 2
BP 239
EP 239
PG 1
WC Genetics & Heredity; Microbiology
SC Genetics & Heredity; Microbiology
GA 152PM
UT WOS:000245374100132
ER

PT J
AU Yooseph, S
   Sutton, G
   Rusch, DB
   Halpern, AL
   Williamson, SJ
   Remington, K
   Eisen, JA
   Heidelberg, KB
   Manning, G
   Li, WZ
   Jaroszewski, L
   Cieplak, P
   Miller, CS
   Li, HY
   Mashiyama, ST
   Joachimiak, MP
   van Belle, C
   Chandonia, JM
   Soergel, DA
   Zhai, YF
   Natarajan, K
   Lee, S
   Raphael, BJ
   Bafna, V
   Friedman, R
   Brenner, SE
   Godzik, A
   Eisenberg, D
   Dixon, JE
   Taylor, SS
   Strausberg, RL
   Frazier, M
   Venter, JC
AF Yooseph, Shibu
   Sutton, Granger
   Rusch, Douglas B.
   Halpern, Aaron L.
   Williamson, Shannon J.
   Remington, Karin
   Eisen, Jonathan A.
   Heidelberg, Karla B.
   Manning, Gerard
   Li, Weizhong
   Jaroszewski, Lukasz
   Cieplak, Piotr
   Miller, Christopher S.
   Li, Huiying
   Mashiyama, Susan T.
   Joachimiak, Marcin P.
   van Belle, Christopher
   Chandonia, John-Marc
   Soergel, David A.
   Zhai, Yufeng
   Natarajan, Kannan
   Lee, Shaun
   Raphael, Benjamin J.
   Bafna, Vineet
   Friedman, Robert
   Brenner, Steven E.
   Godzik, Adam
   Eisenberg, David
   Dixon, Jack E.
   Taylor, Susan S.
   Strausberg, Robert L.
   Frazier, Marvin
   Venter, J. Craig
TI The Sorcerer II Global Ocean Sampling expedition: Expanding the universe
   of protein families
SO PLOS BIOLOGY
LA English
DT Review
ID SUBTILIS GLUTAMINE-SYNTHETASE; MULTIPLE SEQUENCE ALIGNMENT; GREEN-SULFUR
   BACTERIUM; RUBISCO-LIKE PROTEIN; STRUCTURAL GENOMICS;
   MYCOBACTERIUM-TUBERCULOSIS; MAXIMUM-LIKELIHOOD; BACILLUS-SUBTILIS;
   CRYSTAL-STRUCTURE; ESCHERICHIA-COLI
AB Metagenomics projects based on shotgun sequencing of populations of micro-organisms yield insight into protein families. We used sequence similarity clustering to explore proteins with a comprehensive dataset consisting of sequences from available databases together with 6.12 million proteins predicted from an assembly of 7.7 million Global Ocean Sampling (GOS) sequences. The GOS dataset covers nearly all known prokaryotic protein families. A total of 3,995 medium- and large-sized clusters consisting of only GOS sequences are identified, out of which 1,700 have no detectable homology to known families. The GOS-only clusters contain a higher than expected proportion of sequences of viral origin, thus reflecting a poor sampling of viral diversity until now. Protein domain distributions in the GOS dataset and current protein databases show distinct biases. Several protein domains that were previously categorized as kingdom specific are shown to have GOS examples in other kingdoms. About 6,000 sequences (ORFans) from the literature that heretofore lacked similarity to known proteins have matches in the GOS data. The GOS dataset is also used to improve remote homology detection. Overall, besides nearly doubling the number of current proteins, the predicted GOS proteins also add a great deal of diversity to known protein families and shed light on their evolution. These observations are illustrated using several protein families, including phosphatases, proteases, ultraviolet-irradiation DNA damage repair enzymes, glutamine synthetase, and RuBisCO. The diversity added by GOS data has implications for choosing targets for experimental structure characterization as part of structural genomics efforts. Our analysis indicates that new families are being discovered at a rate that is linear or almost linear with the addition of new sequences, implying that we are still far from discovering all protein families in nature.
C1 J Craig Venter Inst, Rockville, MD USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Salk Inst Biol Studies, Razavi Newman Ctr Bioinformat, La Jolla, CA 92037 USA.
   Burnham Inst Med Res, La Jolla, CA USA.
   Univ Calif Los Angeles, Dept Energy, Inst Genom & Prot, Los Angeles, CA USA.
   Univ Calif Berkeley, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
   Univ Calif San Diego, San Diego, CA 92103 USA.
   Brown Univ, Providence, RI 02912 USA.
RP Yooseph, S (reprint author), J Craig Venter Inst, Rockville, MD USA.
EM Shibu.Yooseph@enterinstitute.org
RI Godzik, Adam/A-7279-2009; Li, Weizhong/A-9735-2008; Brenner,
   Steven/A-8729-2008; 
OI Godzik, Adam/0000-0002-2425-852X; Li, Weizhong/0000-0003-1804-9403;
   Brenner, Steven/0000-0001-7559-6185; Miller,
   Christopher/0000-0002-9448-8144; Manning, Gerard/0000-0002-5087-9151;
   Eisen, Jonathan A./0000-0002-0159-2197
FU NCI NIH HHS [P30 CA014195]; NCRR NIH HHS [U54 RR020843, 5U54
   RR020843-02]; NHGRI NIH HHS [5T32 HG00047, K22 HG000056, K22 HG00056,
   T32 HG000047]; NIGMS NIH HHS [P20 GM068136, R01 GM073109]
NR 151
TC 452
Z9 473
U1 6
U2 72
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1544-9173
J9 PLOS BIOL
JI PLoS. Biol.
PD MAR
PY 2007
VL 5
IS 3
BP 432
EP 466
AR e16
DI 10.1371/journal.pbio.0050016
PG 35
WC Biochemistry & Molecular Biology; Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
   Topics
GA 150TW
UT WOS:000245243500007
PM 17355171
ER

PT J
AU Hugel, T
   Michaelis, J
   Hetherington, CL
   Jardine, PJ
   Grimes, S
   Walter, JM
   Faik, W
   Anderson, DL
   Bustamante, C
AF Hugel, Thorsten
   Michaelis, Jens
   Hetherington, Craig L.
   Jardine, Paul J.
   Grimes, Shelley
   Walter, Jessica M.
   Faik, Wayne
   Anderson, Dwight L.
   Bustamante, Carlos
TI Experimental test of connector rotation during DNA packaging into
   bacteriophage phi 29 capsids
SO PLOS BIOLOGY
LA English
DT Article
ID SINGLE-MOLECULE FLUORESCENCE; ESCHERICHIA-COLI; SUPERCOILED DNA; MOTOR;
   FORCES; POLARIZATION; SYMMETRY; PROHEAD; PROTEIN; ATPASE
AB The bacteriophage phi 29 generates large forces to compact its double-stranded DNA genome into a protein capsid by means of a portal motor complex. Several mechanical models for the generation of these high forces by the motor complex predict coupling of DNA translocation to rotation of the head-tail connector dodecamer. Putative connector rotation is investigated here by combining the methods of single-molecule force spectroscopy with polarizationsensitive single-molecule fluorescence. In our experiment, we observe motor function in several packaging complexes in parallel using video microscopy of bead position in a magnetic trap. At the same time, we follow the orientation of single fluorophores attached to the portal motor connector. From our data, we can exclude connector rotation with greater than 99% probability and therefore answer a long-standing mechanistic question.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Tech Univ Munich, Dept Phys, D-8000 Munich, Germany.
   Munich Ctr Integrated Prot Sci, Munich, Germany.
   Ctr NanoSci, Munich, Germany.
   Univ Munich, Dept Chem & Biochem, Munich, Germany.
   Lawrence Berkeley Natl Lab, Berkeley, CA USA.
   Univ Minnesota, Dept Diagnost & Biol Sci, Minneapolis, MN USA.
   Univ Minnesota, Dept Microbiol, Minneapolis, MN USA.
   Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
RP Bustamante, C (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM carlos@alice.berkeley.edu
RI Michaelis, Jens/P-2873-2016
FU NIDCR NIH HHS [DE-03606, R01 DE003606]; NIGMS NIH HHS [GM-071552, R01
   GM071552]
NR 48
TC 82
Z9 82
U1 0
U2 9
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1544-9173
J9 PLOS BIOL
JI PLoS. Biol.
PD MAR
PY 2007
VL 5
IS 3
BP 558
EP 567
AR e59
DI 10.1371/journal.pbio.0050059
PG 10
WC Biochemistry & Molecular Biology; Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
   Topics
GA 150TW
UT WOS:000245243500015
PM 17311473
ER

PT J
AU Krishna, S
   Maslov, S
   Sneppen, K
AF Krishna, Sandeep
   Maslov, Sergei
   Sneppen, Kim
TI UV-induced mutagenesis in Escherichia coli SOS response: A quantitative
   model
SO PLOS COMPUTATIONAL BIOLOGY
LA English
DT Article
ID CYCLOBUTANE PYRIMIDINE DIMERS; DNA-POLYMERASE; ULTRAVIOLET-IRRADIATION;
   REGULATORY SYSTEM; 6-4 PHOTOPRODUCTS; RECA PROTEASE; CLEAVAGE; UMUD;
   DINI; PROTEINS
AB Escherichia coli bacteria respond to DNA damage by a highly orchestrated series of events known as the SOS response, regulated by transcription factors, protein-protein binding, and active protein degradation. We present a dynamical model of the UV-induced SOS response, incorporating mutagenesis by the error-prone polymerase, Pol V. In our model, mutagenesis depends on a combination of two key processes: damage counting by the replication forks and a long-term memory associated with the accumulation of UmuD'. Together, these provide a tight regulation of mutagenesis, resulting, we show, in a "digital'' turn-on and turn-off of Pol V. Our model provides a compact view of the topology and design of the SOS network, pinpointing the specific functional role of each of the regulatory processes. In particular, we suggest that the recently observed second peak in the activity of promoters in the SOS regulon (Friedman et al., 2005, PLoS Biology 3(7): e238) is the result of positive feedback from Pol V to RecA filaments.
C1 Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark.
   Brookhaven Natl Lab, Dept Condensed Matter Phys & Mat Sci, Upton, NY 11973 USA.
RP Sneppen, K (reprint author), Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark.
EM sneppen@nbi.dk
RI Maslov, Sergei/C-2397-2009; 
OI Maslov, Sergei/0000-0002-3701-492X; Sneppen, Kim/0000-0001-9820-3567
NR 32
TC 15
Z9 16
U1 2
U2 13
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 185 BERRY ST, STE 1300, SAN FRANCISCO, CA 94107 USA
SN 1553-734X
J9 PLOS COMPUT BIOL
JI PLoS Comput. Biol.
PD MAR
PY 2007
VL 3
IS 3
BP 451
EP 462
AR e41
DI 10.1371/journal.pcbi.0030041
PG 12
WC Biochemical Research Methods; Mathematical & Computational Biology
SC Biochemistry & Molecular Biology; Mathematical & Computational Biology
GA 163VJ
UT WOS:000246191000011
PM 17367202
ER

PT J
AU Labouriau, A
   Cox, JD
   Schoonover, JR
   Patterson, BM
   Havrilla, GJ
   Stephens, T
   Taylor, D
AF Labouriau, Andrea
   Cox, Jonathan D.
   Schoonover, Jon R.
   Patterson, Brian M.
   Havrilla, George J.
   Stephens, Thomas
   Taylor, Dean
TI Mossbauer, NMR and ATR-FTIR spectroscopic investigation of degradation
   in RTV siloxane foams
SO POLYMER DEGRADATION AND STABILITY
LA English
DT Article
DE siloxane foams; degradation; tin octoate; Mossbauer; NMR; ATR-FTIR
ID VULCANIZED POLYSILOXANE RUBBERS; MULTIVARIATE CURVE RESOLUTION;
   GAMMA-RADIATION; POLY(DIMETHYLSILOXANE) ELASTOMERS; STRESS-RELAXATION;
   AQUEOUS EMULSIONS; SILICA; IMPACT
AB The combination of experimental techniques allowed for a comprehensive study of aging processes occurring in RTV siloxane foams. Sn-119 Mossbauer spectroscopy demonstrated that tin residues are composed of Sn(II) and Sn(IV) species. The 27-year-old foams showed only Sn(IV) species with a quadrupole-splitting parameter larger than that observed for SnO2. Solid-state Si-29 NMR differentiated between the various functional linkages in the foams, and showed no significant change of the di- to trifunctional linkage ratios. High-resolution NMR, on solvent extract of foams, showed the presence of water, catalyst, plasticizer, and some silicone oligomers. ATR-FTIR demonstrated changes near the surface of the foam when aged with water and with the presence of the tin catalyst. Gamma irradiation at a low dose had little effect on compression sets. The main changes observed for artificially aged and aged in service foams were related to the presence of the tin catalyst. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Labouriau, A (reprint author), Los Alamos Natl Lab, Mail Stop E549, Los Alamos, NM 87545 USA.
EM andrea@lanl.gov
RI Stephens, Thomas/D-9512-2012; 
OI Havrilla, George/0000-0003-2052-7152; Labouriau,
   Andrea/0000-0001-8033-9132; Patterson, Brian/0000-0001-9244-7376
NR 23
TC 20
Z9 20
U1 4
U2 30
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0141-3910
J9 POLYM DEGRAD STABIL
JI Polym. Degrad. Stabil.
PD MAR
PY 2007
VL 92
IS 3
BP 414
EP 424
DI 10.1016/j.polymdegradstab.2006.11.017
PG 11
WC Polymer Science
SC Polymer Science
GA 147DK
UT WOS:000244983400010
ER

PT J
AU Toby, BH
AF Toby, B. H.
TI A new approach for instruction in powder crystallography
SO POWDER DIFFRACTION
LA English
DT Article
DE streaming video; computer-based instruction; powder diffraction;
   crystallographic education
ID DIFFRACTION
AB A series of Internet-distributed audio/visual recordings for learning crystallographic analysis of powder diffraction data is discussed. These recordings provide a compact mechanism for distributing educational information. Such presentations provide hands-on discussion beyond what is usually presented in instructional texts. In some cases similar material can be presented with HTML text, but recordings can be created with significantly less effort and are superior for software demonstration. (C) 2007 International Centre for Diffraction Data.
C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Toby, BH (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Toby, Brian/F-3176-2013
OI Toby, Brian/0000-0001-8793-8285
NR 8
TC 3
Z9 3
U1 1
U2 5
PU J C P D S-INT CENTRE DIFFRACTION DATA
PI NEWTOWN SQ
PA 12 CAMPUS BLVD, NEWTOWN SQ, PA 19073-3273 USA
SN 0885-7156
J9 POWDER DIFFR
JI Powder Diffr.
PD MAR
PY 2007
VL 22
IS 1
BP 83
EP 84
DI 10.1154/1.2472366
PG 2
WC Materials Science, Characterization & Testing
SC Materials Science
GA 148GE
UT WOS:000245061800014
ER

PT J
AU Warnick, W
AF Warnick, Walter
TI A vision for speeding up science and technology developments
SO POWER
LA English
DT Editorial Material
C1 US DOE, Off Sci & Tech Informat, Washington, DC 20585 USA.
RP Warnick, W (reprint author), US DOE, Off Sci & Tech Informat, Washington, DC 20585 USA.
EM warnickw@osti.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU TRADEFAIR GROUP
PI HOUSTON
PA 11000 RICHMOND, STE 500, HOUSTON, TX 77042 USA
SN 0032-5929
J9 POWER
JI Power
PD MAR
PY 2007
VL 151
IS 3
BP 88
EP 88
PG 1
WC Energy & Fuels
SC Energy & Fuels
GA 154UY
UT WOS:000245534500025
ER

PT J
AU Meinhold, L
   Smith, JC
AF Meinhold, Lars
   Smith, Jeremy C.
TI Protein dynamics from X-ray crystallography: Anisotropic, global motion
   in diffuse scattering patterns
SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS
LA English
DT Article
DE collective motion; correlation; variance-covariance matrix; principal
   component analysis; harmonicity; damping
ID FREQUENCY NORMAL-MODES; MOLECULAR-DYNAMICS; STAPHYLOCOCCAL NUCLEASE;
   COLLECTIVE MOTIONS; LYSOZYME CRYSTALS; GLOBULAR-PROTEINS; SIMULATION;
   MACROMOLECULES; TEMPERATURE; TROPOMYOSIN
AB Understanding X-ray crystallographic diffuse scattering is likely to improve our comprehension of equilibrium collective protein dynamics. Here, using molecular dynamics (MD) simulation, a detailed analysis is performed of the origins of diffuse scattering in crystalline Staphylococcal nuclease, for which the complete diffuse scattering pattern has been determined experimentally. The hydrogen-atom contribution and the scattering range over which the scattering can be considered to be a sum of solvent and protein scattering are determined. Two models of correlated protein motion are investigated by calculating the model-derived diffuse scattering and comparing with the scattering calculated directly from MD trajectories. In one model, previously used in diffuse scattering interpretation, the atomic displacement correlations decay isotropically with increasing separation. Model correlation lengths are obtained by refining the model scattering against the simulation-derived scattering pattern, and are found to be significantly different from those correlation lengths derived directly from the MD trajectories. Furthermore, the convergence between the model-derived and MD-derived scattering is poor. The second model, in which the displacement correlations are calculated from the principal components of the MD trajectories, is capable of fully reproducing the MD-derived diffuse scattering if the zt50% lowest-frequency modes are included. However, a small number ( 10) of lowest-frequency and largest-amplitude modes dominates the diffuse scattering and thus the correlated protein motions. A detailed analysis of the principal components is performed. In particular, the effective free energy profile associated with each principle mode is analyzed and the eigenfrequency and damping coefficient computed using a model of Brownian dynamics. Those collective modes with effective frequencies below; approximate to 0.5 THz, including those that determine the diffuse scattering, are overdamped.
C1 Univ Heidelberg, Interdisciplinary Ctr Sci Comp IWR, D-69120 Heidelberg, Germany.
   Univ Tennessee, Oak Ridge Natl Lab, Ctr Biophys Mol, Oak Ridge, TN 37831 USA.
RP Meinhold, L (reprint author), Univ Heidelberg, Interdisciplinary Ctr Sci Comp IWR, Neuenheimer Feld 368, D-69120 Heidelberg, Germany.
EM lars.meinhold@iwr.uni-heidelberg.de
RI smith, jeremy/B-7287-2012
OI smith, jeremy/0000-0002-2978-3227
NR 61
TC 22
Z9 22
U1 1
U2 3
PU WILEY-LISS
PI HOBOKEN
PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0887-3585
J9 PROTEINS
JI Proteins
PD MAR
PY 2007
VL 66
IS 4
BP 941
EP 953
DI 10.1002/prot.21246
PG 13
WC Biochemistry & Molecular Biology; Biophysics
SC Biochemistry & Molecular Biology; Biophysics
GA 137MG
UT WOS:000244296100017
PM 17154425
ER

PT J
AU Blair, MW
   Kalchgruber, R
   McKeever, SWS
AF Blair, M. W.
   Kalchgruber, R.
   McKeever, S. W. S.
TI Developing luminescence dating for extraterrestrial applications:
   Characterization of martian simulants and minerals
SO RADIATION MEASUREMENTS
LA English
DT Article
DE OSL; dating; Mars
ID POLYMINERAL FINE GRAINS; SINGLE-ALIQUOT; JSC MARS-1; SEDIMENTS;
   FELDSPARS; ARCHAEOLOGY; QUARTZ; IMPACT
AB Currently, the timing of geologic and climatic events on Mars is poorly constrained, particularly for events that may have occurred over the last one million years of martian history, as the only dating technique currently available is crater counting which has an error of approximately one million years. Optically stimulated luminescence (OSL) datin,g has been suggested as a technique that can be adapted for robotic in situ dating of martian sediments that have been transported and deposited by wind or water over the last 10(4)-10(5) years. This paper evaluates the potential of OSL for dating of martian surface geomorphologic features using a so-called "single-aliquot regenerative-dose" (SAR) technique for radiation dosimetry. The study evaluates the utility of the SAR technique for martian dating purposes using martian regolith simulants and martian meteorites. It is found that these materials have the requisite OSL properties for radiation dosimetry and can potentially be used for geological dating. (c) 2007 Elsevier Ltd. All rights reserved.
C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
   Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA.
RP Blair, MW (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, EES-2 MS J495, Los Alamos, NM 87545 USA.
EM mblair@lanl.gov
OI DeWitt, Regina/0000-0003-2876-5489
NR 35
TC 7
Z9 7
U1 0
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1350-4487
J9 RADIAT MEAS
JI Radiat. Meas.
PD MAR
PY 2007
VL 42
IS 3
BP 392
EP 399
DI 10.1016/j.radmeas.2007.01.038
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA 183QH
UT WOS:000247586800010
ER

PT J
AU Hernandez-Cruz, D
   Hitchcock, AP
   Tyliszczak, T
   Rousseau, ME
   Pezolet, M
AF Hernandez-Cruz, D.
   Hitchcock, A. P.
   Tyliszczak, T.
   Rousseau, M. -E.
   Pezolet, M.
TI In situ azimuthal rotation device for linear dichroism measurements in
   scanning transmission x-ray microscopy
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID ADVANCED LIGHT-SOURCE; SPIDER SILK; MICRODIFFRACTION; EXTRUSION;
   BEAMLINE; ANGLE
AB A novel miniature rotation device used in conjunction with a scanning transmission x-ray microscope is described. It provides convenient in situ sample rotation to enable measurements of linear dichroism at high spatial resolution. The design, fabrication, and mechanical characterization are presented. This device has been used to generate quantitative maps of the spatial distribution of the orientation of proteins in several different spider and silkworm silks. Specifically, quantitative maps of the dichroic signal at the C 1s ->pi(*)(amide) transition in longitudinal sections of the silk fibers give information about the spatial orientation, degree of alignment, and spatial distribution of protein peptide bonds. A new approach for analyzing the dichroic signal to extract orientation distributions, in addition to magnitudes of aligned components, is presented and illustrated with results from Nephila clavipes dragline spider silk measured using the in situ rotation device.
C1 McMaster Univ, Dept Chem, Hamilton, ON L8S 4M1, Canada.
   McMaster Univ, BIMR, Hamilton, ON L8S 4M1, Canada.
   Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   Univ Laval, Dept Chim, Ste Foy, PQ G1K 7P4, Canada.
   Univ Laval, CERSIM, Ste Foy, PQ G1K 7P4, Canada.
RP Hernandez-Cruz, D (reprint author), McMaster Univ, Dept Chem, 1280 Main St W, Hamilton, ON L8S 4M1, Canada.
EM aph@mcmaster.ca
OI Hernandez Cruz, Daniel/0000-0003-4950-7155
NR 18
TC 7
Z9 7
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 033703
DI 10.1063/1.2716502
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800018
PM 17411187
ER

PT J
AU Jachmann, RC
   Trease, DR
   Bouchard, LS
   Sakellariou, D
   Martin, RW
   Schlueter, RD
   Budinger, TF
   Pines, A
AF Jachmann, R. C.
   Trease, D. R.
   Bouchard, L. -S.
   Sakellariou, D.
   Martin, R. W.
   Schlueter, R. D.
   Budinger, T. F.
   Pines, A.
TI Multipole shimming of permanent magnets using harmonic corrector rings
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID HIGH-RESOLUTION NMR; DESIGN; SAMPLES; FIELD
AB Shimming systems are required to provide sufficient field homogeneity for high resolution nuclear magnetic resonance (NMR). In certain specialized applications, such as rotating-field NMR and mobile ex situ NMR, permanent magnet-based shimming systems can provide considerable advantages. We present a simple two-dimensional shimming method based on harmonic corrector rings which can provide arbitrary multipole order shimming corrections. Results demonstrate, for example, that quadrupolar order shimming improves the linewidth by up to an order of magnitude. An additional order of magnitude reduction is in principle achievable by utilizing this shimming method for z-gradient correction and higher order xy gradients. (c) 2007 American Institute of Physics.
C1 Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   CEA Saclay, Lab Struct & Dynam Resonance Magnet, Comis Nacl Energia Atom, Serv Chim Mol, F-91191 Gif Sur Yvette, France.
   Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA.
   Lawrence Berkeley Natl Lab, Div Engn, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA.
RP Jachmann, RC (reprint author), Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA.
EM gbright1@gmail.com
RI Sakellariou, Dimitrios/F-2846-2010
OI Sakellariou, Dimitrios/0000-0001-7424-5543
NR 8
TC 13
Z9 13
U1 1
U2 7
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 035115
DI 10.1063/1.2713438
PG 7
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800056
PM 17411225
ER

PT J
AU Kelly, TF
   Miller, MK
AF Kelly, Thomas F.
   Miller, Michael K.
TI Invited review article: Atom probe tomography
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Review
ID FIELD-ION MICROSCOPY; FE-CR ALLOYS; SPECIMEN PREPARATION TECHNIQUE;
   MULTILAYER FILM STRUCTURES; LIQUID-METAL ION; SPINODAL DECOMPOSITION;
   COMPUTER-MODELS; APT CHARACTERIZATION; DETECTION EFFICIENCY; ELECTRON
   MULTIPLIER
AB The technique of atom probe tomography (APT) is reviewed with an emphasis on illustrating what is possible with the technique both now and in the future. APT delivers the highest spatial resolution (sub-0.3-nm) three-dimensional compositional information of any microscopy technique. Recently, APT has changed dramatically with new hardware configurations that greatly simplify the technique and improve the rate of data acquisition. In addition, new methods have been developed to fabricate suitable specimens from new classes of materials. Applications of APT have expanded from structural metals and alloys to thin multilayer films on planar substrates, dielectric films, semiconducting structures and devices, and ceramic materials. This trend toward a broader range of materials and applications is likely to continue.
C1 Imago Sci Instruments Corp, Madison, WI 53711 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
RP Kelly, TF (reprint author), Imago Sci Instruments Corp, 5500 Nobel Dr, Madison, WI 53711 USA.
RI Felfer, Peter/H-6024-2011
NR 155
TC 368
Z9 370
U1 7
U2 170
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 031101
DI 10.1063/1.2709758
PG 20
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800002
PM 17411171
ER

PT J
AU Littrell, KC
   Velthuis, SGET
   Felcher, GP
   Park, S
   Kirby, BJ
   Fitzsimmons, MR
AF Littrell, K. C.
   Velthuis, S. G. E. te
   Felcher, G. P.
   Park, S.
   Kirby, B. J.
   Fitzsimmons, M. R.
TI Magnetic compound refractive lens for focusing and polarizing cold
   neutron beams
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID SEXTUPOLE MAGNET; SPIN-ECHO; X-RAYS; SCATTERING; OPTICS; INSTRUMENT
AB Biconcave cylindrical lenses are used to focus beams of x rays or neutrons using the refractive properties of matter. In the case of neutrons, the refractive properties of magnetic induction can similarly focus and simultaneously polarize the neutron beam without the concomitant attenuation of matter. This concept of a magnetic refractive lens was tested using a compound lens consisting of 99 pairs of cylindrical permanent magnets. The assembly successfully focused the intensity of a white beam of cold neutrons of one spin state at the detector, while defocusing the other. This experiment confirmed that a lens of this nature may boost the intensity locally by almost an order of magnitude and create a polarized beam. An estimate of the performance of a more practically dimensioned device suitable for incorporation in reflectometers and slit-geometry small angle scattering instruments is given. (c) 2007 American Institute of Physics.
C1 Argonne Natl Lab, Argonne, IL 60439 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Littrell, KC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Lujan Center, LANL/G-4896-2012; te Velthuis, Suzanne/I-6735-2013;
   Littrell, Kenneth/D-2106-2013
OI te Velthuis, Suzanne/0000-0002-1023-8384; Littrell,
   Kenneth/0000-0003-2308-8618
NR 22
TC 4
Z9 4
U1 1
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 035101
DI 10.1063/1.2709844
PG 8
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800042
PM 17411211
ER

PT J
AU Miller, JE
   Boehly, TR
   Melchior, A
   Meyerhofer, DD
   Celliers, PM
   Eggert, JH
   Hicks, DG
   Sorce, CM
   Oertel, JA
   Emmel, PM
AF Miller, J. E.
   Boehly, T. R.
   Melchior, A.
   Meyerhofer, D. D.
   Celliers, P. M.
   Eggert, J. H.
   Hicks, D. G.
   Sorce, C. M.
   Oertel, J. A.
   Emmel, P. M.
TI Streaked optical pyrometer system for laser-driven shock-wave
   experiments on OMEGA
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID COMPRESSION; DEUTERIUM
AB The temperature of laser-driven shock waves is of interest to inertial confinement fusion and high-energy-density physics. We report on a streaked optical pyrometer that measures the self-emission of laser-driven shocks simultaneously with a velocity interferometer system for any reflector (VISAR). Together these diagnostics are used to obtain the temporally and spatially resolved temperatures of approximately megabar shocks driven by the OMEGA laser. We provide a brief description of the diagnostic and how it is used with VISAR. Key spectral calibration results are discussed and important characteristics of the recording system are presented. (c) 2007 American Institute of Physics.
C1 Univ Rochester, Laser Energet Lab, Dept Mech Engn, Rochester, NY 14623 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Sydor Instruments, Rochester, NY 14623 USA.
   Nucl Res Ctr Negev, Dept Phys, IL-84190 Beer Sheva, Israel.
   Univ Rochester, Dept Phys, Rochester, NY 14623 USA.
RP Miller, JE (reprint author), Univ Rochester, Laser Energet Lab, Dept Mech Engn, 250 E River Rd, Rochester, NY 14623 USA.
RI Hicks, Damien/B-5042-2015
OI Hicks, Damien/0000-0001-8322-9983
NR 22
TC 67
Z9 68
U1 1
U2 15
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0034-6748
EI 1089-7623
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 034903
DI 10.1063/1.2712189
PG 7
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800040
PM 17411209
ER

PT J
AU Scott, JR
   Tremblay, PL
AF Scott, Jill R.
   Tremblay, Paul L.
TI Noncontact measurement of electrostatic fields: Verification of modeled
   potentials within ion mobility spectrometer drift tube designs
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID ELECTRIC-FIELDS; KELVIN METHOD
AB The heart of an ion mobility spectrometer is the drift region where ion separation occurs. While the electrostatic potentials within a drift tube design can be modeled, no method for independently validating the electrostatic field has previously been reported. Two basic drift tube designs were modeled using SIMION 7.0 to reveal the expected electrostatic fields: (1) A traditional alternating set of electrodes and insulators and (2) a truly linear drift tube. One version of the alternating electrode/insulator drift tube and two versions of linear drift tubes were then fabricated. The stacked alternating electrodes/insulators were connected through a resistor network to generate the electrostatic gradient in the drift tube. The two linear drift tube designs consisted of two types of resistive drift tubes with one tube consisting of a resistive coating within an insulating tube and the other tube composed of resistive ferrites. The electrostatic fields within each type of drift tube were then evaluated by a noncontact method using a Kelvin-Zisman type electrostatic voltmeter and probe (results for alternative measurement methods provided in supplementary material). The experimental results were then compared with the electrostatic fields predicted by SIMION. Both the modeling and experimental measurements reveal that the electrostatic fields within a stacked ion mobility spectrometer drift tube are only pseudo-linear, while the electrostatic fields within a resistive drift tube approach perfect linearity. (c) 2007 American Institute of Physics.
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Scott, JR (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA.
EM jill.scott@inl.gov
RI Scott, Jill/G-7275-2012
NR 21
TC 3
Z9 3
U1 2
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 035110
DI 10.1063/1.2713424
PG 4
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800051
PM 17411220
ER

PT J
AU Tranter, RS
   Giri, BR
   Kiefer, JH
AF Tranter, Robert S.
   Giri, Binod R.
   Kiefer, John H.
TI Shock tube/time-of-flight mass spectrometer for high temperature kinetic
   studies
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID THERMAL-DECOMPOSITION; PROPARGYL RADICALS; CYCLOHEXENE; WAVES;
   DISSOCIATION; APPARATUS; METHANE; BEAM; TUBE
AB A shock tube (ST) with online, time-of-flight mass spectrometric (TOF-MS) detection has been constructed for the study of elementary reactions at high temperature. The ST and TOF-MS are coupled by a differentially pumped molecular beam sampling interface, which ensures that the samples entering the TOF-MS are not contaminated by gases drawn from the cold end wall thermal boundary layer in the ST. Additionally, the interface allows a large range of postshock pressures to be used in the shock tube while maintaining high vacuum in the TOF-MS. The apparatus and the details of the sampling system are described along with an analysis in which cooling of the sampled gases and minimization of thermal boundary layer effects are discussed. The accuracy of kinetic measurements made with the apparatus has been tested by investigating the thermal unimolecular dissociation of cyclohexene to ethylene and 1,3-butadiene, a well characterized reaction for which considerable literature data that are in good agreement exist. The experiments were performed at nominal reflected shock wave pressures of 600 and 1300 Torr, and temperatures ranging from 1260 to 1430 K. The rate coefficients obtained are compared with the earlier shock tube studies and are found to be in very good agreement. As expected no significant difference is observed in the rate constant between pressures of 600 and 1300 Torr. (c) 2007 American Institute of Physics.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
   Univ Illinois, Dept Chem Engn, Chicago, IL 60607 USA.
RP Tranter, RS (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM tranter@anl.gov
NR 41
TC 21
Z9 21
U1 0
U2 18
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 034101
DI 10.1063/1.2437150
PG 11
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800027
PM 17411196
ER

PT J
AU Williams, TC
   Schefer, RW
   Oefelein, JC
   Shaddix, CR
AF Williams, Timothy C.
   Schefer, Robert W.
   Oefelein, Joseph C.
   Shaddix, Christopher R.
TI Idealized gas turbine combustor for performance research and validation
   of large eddy simulations
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID LASER-INDUCED FLUORESCENCE; TEMPERATURE-MEASUREMENTS; MODEL COMBUSTOR;
   SWIRL FLAMES; FLOW; VELOCITY; INSTABILITY; FLASHBACK; PRESSURE; SYSTEMS
AB This paper details the design of a premixed, swirl-stabilized combustor that was designed and built for the express purpose of obtaining validation-quality data for the development of large eddy simulations (LES) of gas turbine combustors. The combustor features nonambiguous boundary conditions, a geometrically simple design that retains the essential fluid dynamics and thermochemical processes that occur in actual gas turbine combustors, and unrestrictive access for laser and optical diagnostic measurements. After discussing the design detail, a preliminary investigation of the performance and operating envelope of the combustor is presented. With the combustor operating on premixed methane/air, both the equivalence ratio and the inlet velocity were systematically varied and the flame structure was recorded via digital photography. Interesting lean flame blowout and resonance characteristics were observed. In addition, the combustor exhibited a large region of stable, acoustically clean combustion that is suitable for preliminary validation of LES models. (c) 2007 American Institute of Physics.
C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
RP Williams, TC (reprint author), Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA.
RI Schefer, Jurg/G-3960-2012
NR 35
TC 7
Z9 7
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD MAR
PY 2007
VL 78
IS 3
AR 035114
DI 10.1063/1.2712936
PG 9
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 151WE
UT WOS:000245320800055
PM 17411224
ER

PT J
AU Hanrahan, TP
AF Hanrahan, Timothy P.
TI Large-scale spatial variability of riverbed temperature gradients in
   Snake River fall Chinook salmon spawning areas
SO RIVER RESEARCH AND APPLICATIONS
LA English
DT Article
DE temperature; hyporheic; riverbed; salmon
ID ATLANTIC SALMON; WATER-TEMPERATURE; HYPORHEIC ZONE; CHUM SALMON; STREAM
   TEMPERATURE; DISSOLVED-OXYGEN; TIME-SERIES; BED; EGG; REDDS
AB In the Snake River basin of the Pacific northwestern United States, hydroelectric dam operations are often based on the predicted emergence timing of salmon fry from the riverbed. The spatial variability and complexity of surface water and riverbed temperature gradients results in emergence timing predictions that are likely to have large errors. The objectives of this study were to quantify the thermal heterogeneity between the river and riverbed in fall Chinook salmon spawning areas and to determine the effects of thermal heterogeneity on fall Chinook salmon emergence timing. This study quantified river and riverbed temperatures at 15 fall Chinook salmon spawning sites distributed in two reaches throughout 160 km of the Snake River in Hells Canyon, Idaho, USA, during 3 different water years. Temperatures were measured during the fall Chinook salmon incubation period with self-contained data loggers placed in the river and at three different depths below the riverbed surface. At all sites, temperature increased with depth into the riverbed, including significant differences (p < 0.05) in mean hourly water temperature of up to 3.8 degrees C between the river and the riverbed among all the sites. During each of the 3 water years studied, river and riverbed temperatures varied significantly among all the study sites, among the study sites within each reach and between sites located in the two reaches. Considerable variability in riverbed temperatures among the sites resulted in fall Chinook salmon emergence timing estimates that varied by as much as 36 days within a reach, depending on the source of temperature data used for the estimate. Monitoring of riverbed temperature gradients at a range of spatial scales throughout the Snake River would provide better information for managing hydroelectric dam operations, and would aid in the design and interpretation of future empirical research into the ecological significance of physical riverine processes. Published in 2007 by John Wiley & Sons, Ltd.
C1 Pacific NW Natl Lab, Richland, WA 99354 USA.
RP Hanrahan, TP (reprint author), Pacific NW Natl Lab, POB 999,MS K6-85, Richland, WA 99354 USA.
EM tim.hanrahan@pnl.gov
NR 59
TC 9
Z9 9
U1 2
U2 20
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1535-1459
J9 RIVER RES APPL
JI River Res. Appl.
PD MAR
PY 2007
VL 23
IS 3
BP 323
EP 341
DI 10.1002/rra.982
PG 19
WC Environmental Sciences; Water Resources
SC Environmental Sciences & Ecology; Water Resources
GA 149HM
UT WOS:000245137900006
ER

PT J
AU Palmer, TA
   Elmer, JW
AF Palmer, T. A.
   Elmer, J. W.
TI Characterisation of electron beams at different focus settings and work
   distances in multiple welders using the enhanced modified Faraday cup
SO SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
LA English
DT Article
DE electron beam welding; diagnostics; enhanced modified Faraday cup; work
   distance; focus setting; electron beam optics
ID POWER-DENSITY DISTRIBUTION; MECHANICAL-PROPERTIES; OSCILLATION;
   WELDMENTS
AB Using the enhanced modified Faraday cup (EMFC), the differences in the beams produced by two electron beam welders are characterised at different focus settings and work distances. For example, EMFC measurements show that sharply focused beams display different shapes and peak power densities which vary by nearly 20% for the same welding parameters on these two welders. Increases in work distance on each machine were shown to result in decreases in both the peak power density and the resulting weld size and shape. Because of the differences in machine performance, additional differences also arise when comparing the welds produced by each machine. These different weld dimensions are attributed to differences in the beam shape and a 70 mm difference in the theoretical beam crossover location in the upper column of the two welders. The crossover location, which can not be physically measured, is determined using the EMFC by analysing the beam distribution parameters of sharply focused beams over a range of work distances. By combining these results with simplified optics calculations, the magnification of the beam optics can be determined and the machine performance of each welder characterised. The work distance on each machine at which beams with similar peak power density values will be produced can then be determined. With this knowledge, changes in either the beam focus or work distance can be made to attain similar beams from different welders, thus providing a baseline for developing modern weld transfer procedures.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Palmer, TA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
EM palmer18@llnl.gov
NR 22
TC 6
Z9 6
U1 0
U2 6
PU MANEY PUBLISHING
PI LEEDS
PA STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND
SN 1362-1718
J9 SCI TECHNOL WELD JOI
JI Sci. Technol. Weld. Join.
PD MAR
PY 2007
VL 12
IS 2
BP 161
EP 174
DI 10.1179/174329307X176631
PG 14
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA 128ED
UT WOS:000243640100008
ER

PT J
AU Crawley, CE
AF Crawley, Catherine E.
TI Localized debates of agricultural biotechnology in community newspapers
   - A quantitative content analysis of media frames and sources
SO SCIENCE COMMUNICATION
LA English
DT Article
DE framing; biotechnology; local news; sources; content analysis
ID NEWS COVERAGE; CONSTRUCTIONIST APPROACH; SOCIAL CONSTRUCTION;
   PUBLIC-OPINION; MASS-MEDIA; COMMUNICATION; DISCOURSE; KNOWLEDGE; ISSUES;
   IMAGES
AB This research is a quantitative content analysis of agricultural biotechnology coverage appearing in a collection of community newspapers in Northern California and Missouri between 1992 and 2004. It examines the similarities and differences in news media frames used to focus the debate at the local level, and evaluates the frequency and range of dominant political and social actors as news sources. Newspaper coverage in some community newspapers frames the story in more complex and diverse ways and includes a wider range of voices than has been reported in studies of coverage in the national, elite press. Oppositional viewpoints exist in some local newspapers, perhaps more so than in national news.
C1 Oak Ridge Associated Univ, Oak Ridge, TN USA.
RP Crawley, CE (reprint author), Oak Ridge Associated Univ, POB 117,MS 44, Oak Ridge, TN USA.
EM crawleyc@orau.gov
NR 82
TC 22
Z9 23
U1 0
U2 12
PU SAGE PUBLICATIONS INC
PI THOUSAND OAKS
PA 2455 TELLER RD, THOUSAND OAKS, CA 91320 USA
SN 1075-5470
J9 SCI COMMUN
JI Sci. Commun.
PD MAR
PY 2007
VL 28
IS 3
BP 314
EP 346
DI 10.1177/1075547006298253
PG 33
WC Communication
SC Communication
GA 145LG
UT WOS:000244866000002
ER

PT J
AU Song, SX
   Horton, JA
   Kim, NJ
   Nieh, TG
AF Song, S. X.
   Horton, J. A.
   Kim, N. J.
   Nieh, T. G.
TI Deformation behavior of a twin-roll-cast Mg-6Zn-0.5Mn-0.3Cu-0.02Zr alloy
   at intermediate temperatures
SO SCRIPTA MATERIALIA
LA English
DT Article
DE magnesium alloys; twin roll cast; high temperature deformation;
   dislocation glide
ID MAGNESIUM SINGLE CRYSTALS; ELEVATED-TEMPERATURES; NONBASAL SLIP
AB The mechanical properties of a twin-roll-cast Mg-6Zn-0.5Mn-0.3Cu-0.02Zr were measured at temperatures from 423 to 523 K. Constant strain rate, strain-rate-change and temperature change tests were employed to characterize the plastic flow behavior of the alloy. It was observed that a in low-strain-rate and high-temperature regime the alloy follows a power-law behavior; however, the power law breaks down at high strain rates and low temperatures. Transient experiments were also conducted to identify the deformation mechanism. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   POSTECH, Ctr Adv Aerosp Mat, Pohang, South Korea.
RP Song, SX (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM ssong1@utk.edu
RI Song, Shuangxi/E-4259-2012; Nieh, Tai-Gang/G-5912-2011
OI Nieh, Tai-Gang/0000-0002-2814-3746
NR 14
TC 39
Z9 45
U1 1
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAR
PY 2007
VL 56
IS 5
BP 393
EP 395
DI 10.1016/j.scriptamat.2006.10.040
PG 3
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
   Metallurgical Engineering
GA 134UI
UT WOS:000244109200018
ER

PT J
AU Pereloma, EV
   Timokhina, IB
   Jonas, JJ
   Miller, MK
AF Pereloma, E. V.
   Timokhina, I. B.
   Jonas, J. J.
   Miller, M. K.
TI Microstructural characterization of warm rolled Cr-containing low carbon
   steel
SO SCRIPTA MATERIALIA
LA English
DT Article
DE ferritic steel; atom probe tomography; dynamic strain aging;
   dislocations; clustering
AB Transmission electron microscopy and atom probe tomography (APT) were used to study carbide formation, solute clustering and solute segregation to dislocations in a warm rolled low carbon steel containing a Cr addition. It was shown that formation of Cr carbides in addition to iron carbide leads to the solute C depletion of the matrix. The presence of fine C-Fe-Cr clusters in the matrix and Cottrell atmospheres was also detected by atom probe tomography. Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
C1 Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia.
   McGill Univ, Dept Mat Engn, Montreal, PQ H3A 2B2, Canada.
   Oak Ridge Natl Lab, Div Engn & Mat Sci, Oak Ridge, TN 37831 USA.
RP Pereloma, EV (reprint author), Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia.
EM elena.pereloma@eng.monash.edu.au
RI Jonas, John/A-2773-2008
OI Jonas, John/0000-0001-7291-6673
NR 16
TC 3
Z9 5
U1 0
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAR
PY 2007
VL 56
IS 6
BP 521
EP 524
DI 10.1016/j.scriptamat.2006.11.027
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
   Metallurgical Engineering
GA 133HW
UT WOS:000244005000021
ER

PT J
AU Luo, WS
   D'Angelo, EM
   Coyne, MS
AF Luo, Wensui
   D'Angelo, Elisa M.
   Coyne, Mark S.
TI Plant secondary metabolites, biphenyl, and
   hydroxypropyl-beta-cyclodextrin effects on aerobic polychlorinated
   biphenyl removal and microbial community structure in soils
SO SOIL BIOLOGY & BIOCHEMISTRY
LA English
DT Article
DE polychlorinated biphenyls; plant secondary metabolites; surfactant;
   phospholipid fatty acid; microbial community structures
ID POLYCHLOROBIPHENYL-CONTAMINATED SOIL; PCB-DEGRADING BACTERIA; EX-SITU
   BIOREMEDIATION; TRITON X-100; BIODEGRADATION; DECHLORINATION;
   RHIZOSPHERE; EARTHWORMS; INDUCTION; TERPENES
AB Biphenyl and several plant secondary metabolites (PSM) (carvone. isoprene, limonene. naringin, and coumarin) and surfactant (hydroxypropyl-beta-cyclodextrin, (HP-beta-CD)) have been shown to improve aerobic polychlorinatcd biplienyl (PCB) removal by several bacterial species. The objective of this study was to determine whether these treatments also affect PCB removal and microbial community structure in a high organic matter soil (Pahokee soil series with 67%,, organic matter) and low organic matter soil (Woolper soil series with 6% organic matter), as determined by monitoring changes in PCB levels and phospholipid fatty acids (PLFA) profiles in laboratory microcosms amended with these compounds. Biphenyl enhanced di-chlorinated and tri-chlorinated biphenyl removal in both soils, but PSM did not improve removal of these congeners. On the contrary, HP-beta-CD decreased PCB removal when used in combination with biphenyl. Two-way analysis of variance indicated that HP-P-CD significantly increased tetra- and penta-chlorinated biphenyl removal from the high organic matter soil, but not from the low organic matter soil. Principal components analysis of PLFA data indicated that HP-beta-CD increased proportions of 18:1((!))7c associated with Gram-negative bacteria, but decreased 10me16 and 10me17 lipid associated with Gram-positive bacteria, while biphenyl and PSMs had no detectable effects on soil microbial communities. PCB removal was not correlated to any PLFA. In conclusion PSM previously shown to enhance PCB removal in soil-free systems were not effective in two divergent soils evaluated in this study, and HP-beta-CB had increase, decrease, or no effect on PCB removal depending on types of PCB congeners. soils. and co-amendments. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Univ Kentucky, Dept Plant & Soil Sci, Soil & Water Biogeochem Lab, Lexington, KY 40546 USA.
RP Luo, WS (reprint author), Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
EM lwens2@uky.edu
NR 37
TC 20
Z9 22
U1 0
U2 19
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-0717
J9 SOIL BIOL BIOCHEM
JI Soil Biol. Biochem.
PD MAR
PY 2007
VL 39
IS 3
BP 735
EP 743
DI 10.1016/j.soilbio.2006.09.019
PG 9
WC Soil Science
SC Agriculture
GA 128JS
UT WOS:000243654600003
ER

PT J
AU Cliff, JB
   Bottomley, PJ
   Gaspar, DJ
   Myrold, DD
AF Cliff, John B.
   Bottomley, Peter J.
   Gaspar, Daniel J.
   Myrold, David D.
TI Nitrogen mineralization and assimilation at millimeter scales
SO SOIL BIOLOGY & BIOCHEMISTRY
LA English
DT Article
DE ammonification; immobilization; isotope dilution; time-of-flight
   secondary ion mass spectrometry; SIMS; nitrogen
ID NITRATE ASSIMILATION; SOIL
AB This study used inoculated. artificial soil microcosms containing sand, clay, cellulose, and localized "hotspots" of highly labile, organic N-containing dead bacteria to study N mineralization and assimilation at millimeter scales. Labeling with (NH4+)-N-15 along with measurement of its assimilation into microbial biomass at the bulk scale allowed estimation of gross rates of ammonification and N assimilation using isotope dilution. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) analyses of transects of organic-N-15 across Si wafers in contact with the microcosms indicated strong gradients of (NH4+)-N-15 assimilation as a function of proximity to the hotspots that were not apparent using bulk analyses. This combination of bulk and ToF-SIMS analyses represents a powerful approach to explore the physical and biochemical factors that affect N process heterigeneities in soils. (c) 2006 Elsevier Ltd. All rights reserved.
C1 Oregon State Univ, Dept Crop & Soil Sci, Corvallis, OR 97331 USA.
   Oregon State Univ, Dept Microbiol, Corvallis, OR 97331 USA.
   Pacific NW Natl Lab, Adv Radioanalyt Chem, Richland, WA 99352 USA.
   Pacific NW Natl Lab, William R Wiley Environm Mol Sci Lab, Richland, WA 99352 USA.
RP Myrold, DD (reprint author), Oregon State Univ, Dept Crop & Soil Sci, Agr Life Sci Bldg 3017, Corvallis, OR 97331 USA.
EM David.Myrold@oregonstate.edu
RI Cliff, John/C-7696-2011; Myrold, David/E-1813-2011; Gaspar,
   Dan/H-6166-2011; 
OI Cliff, John/0000-0002-7395-5604; Myrold, David/0000-0001-6418-226X;
   Gaspar, Daniel/0000-0002-8089-810X
NR 15
TC 10
Z9 11
U1 1
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0038-0717
J9 SOIL BIOL BIOCHEM
JI Soil Biol. Biochem.
PD MAR
PY 2007
VL 39
IS 3
BP 823
EP 826
DI 10.1016/j.soilbio.2006.10.005
PG 4
WC Soil Science
SC Agriculture
GA 128JS
UT WOS:000243654600013
ER

PT J
AU Froberg, M
   Jardine, PM
   Hanson, PJ
   Swanston, CW
   Todd, DE
   Tarver, JR
   Garten, CT
AF Froberg, M.
   Jardine, P. M.
   Hanson, P. J.
   Swanston, C. W.
   Todd, D. E.
   Tarver, J. R.
   Garten, C. T., Jr.
TI Low dissolved organic carbon input from fresh litter to deep mineral
   soils
SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
LA English
DT Article
ID DECIDUOUS FOREST FLOOR; OAK FOREST; HUMIC SUBSTANCES; WATERSHEDS;
   TRANSPORT; NITROGEN; FLUXES; MODEL; C-14; PRECIPITATION
AB Dissolved organic carbon (DOC) leached from recent litter in the forest floor has been suggested to be an important source of C to the mineral soil of forest ecosystems. To determine the rate at which this flux of C occurs, we have taken advantage of a local release of C-14 at Oak Ridge National Laboratory Reservation, Oak Ridge, TN (35 degrees 58'N, 84 degrees 16V). Eight replicate 7- by 7-m plots were established at four field sites on the reservation in an upland oak forest setting. Half of the plots were provided with C-14-enriched litter (Delta C-14 approximate to 1000 parts per thousand), and the other half with near-background litter (Delta C-14 approximate to 220 parts per thousand) for multiple years. Differences in the labeled leaf litter were used to quantify the movement of litter-derived DOC through the soil profile. Soil solutions were collected for several years with tension lysimeters at 15- and 70-cm depths and measured for DOC concentration and 14C abundance. The net amount of DOC retained between 15 and 70 cm was between 2 and 10 g m(-2) yr(-1). There were significant effects of the litter additions on the C-14 abundance in the DOC, but the net transport of C-14 from the added litter was small. The difference in Delta C-14 between the treatments with enriched and near-background litter was only about 130 parts per thousand at both depths, which is small compared with the difference in Delta C-14 in the added litter. The primary source of DOC within the mineral soil must therefore have been either the Oe or Oa horizon or the organic matter in the mineral soil. During a 2-yr time frame, leaching of DOC from recent litter did not have a major impact on the C stock in the mineral soil below 15 cm in this ecosystem.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA.
RP Froberg, M (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM froebergmj@ornl.gov
RI Hanson, Paul J./D-8069-2011; Froberg, Mats/E-8741-2012; Phillips,
   Jana/G-4755-2016
OI Hanson, Paul J./0000-0001-7293-3561; Phillips, Jana/0000-0001-9319-2336
NR 33
TC 33
Z9 34
U1 1
U2 37
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 0361-5995
J9 SOIL SCI SOC AM J
JI Soil Sci. Soc. Am. J.
PD MAR-APR
PY 2007
VL 71
IS 2
BP 347
EP 354
DI 10.2136/sssaj2006.0188
PG 8
WC Soil Science
SC Agriculture
GA 147CJ
UT WOS:000244980700011
ER

PT J
AU Kreuzer-Martin, HW
AF Kreuzer-Martin, Helen W.
TI Stable isotope probing: Linking functional activity to specific members
   of microbial communities
SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL
LA English
DT Article
ID SULFATE-REDUCING BACTERIA; PHOSPHOLIPID FATTY-ACIDS;
   HYDROCARBON-CONTAMINATED AQUIFER; METHANE-OXIDIZING BACTERIA;
   RHIZOSPHERE CARBON FLOW; IN-SITU; RIBOSOMAL-RNA; BIOGEOCHEMICAL
   PROCESSES; UNCULTURED MICROORGANISMS; TECHNICAL CONSIDERATIONS
AB Linking organisms or groups of organisms to specific functions within natural environments is a fundamental challenge in microbial ecology. Advances in technology for manipulating and analyzing nucleic acids have made it possible to characterize the members of microbial communities without the intervention of laboratory culturing. Results from such studies have shown that the vast majority of soil organisms have never been cultured, highlighting the risks of culture-based approaches in community analysis. The development of culture-independent techniques for following the flow of substrates through microbial communities therefore represents an important advance. These techniques, collectively known as stable isotope probing (SIP), involve introducing a stable isotope-labeled substrate into a microbial community and following the fate of the substrate by extracting diagnostic molecular species such as fatty acids and nucleic acids from the community and determining which specific molecules have incorporated the isotope. The molecules in which the isotope label appears provide identifying information about the organism that incorporated the substrate. Stable isotope probing allows direct observations of substrate assimilation in minimally disturbed communities, and thus represents an exciting new tool for linking microbial identity and function. The use of lipids or nucleic acids as the diagnostic molecule brings different strengths and weaknesses to the experimental approach, and necessitates the use of significantly different instrumentation and analytical techniques. This short review provides an overview of the lipid and nucleic acid approaches, discusses their strengths and weaknesses, gives examples of applications in various settings, and looks at prospects for the future of SIP technology.
C1 Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Kreuzer-Martin, HW (reprint author), Pacific NW Natl Lab, 999 Battelle Blvd,P8-13, Richland, WA 99352 USA.
EM Helen.Kreuzer@pnl.gov
RI Abu Laban , Dr. Nidal /E-5809-2011
NR 90
TC 24
Z9 27
U1 7
U2 56
PU SOIL SCI SOC AMER
PI MADISON
PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 USA
SN 0361-5995
J9 SOIL SCI SOC AM J
JI Soil Sci. Soc. Am. J.
PD MAR-APR
PY 2007
VL 71
IS 2
BP 611
EP 619
DI 10.2136/sssaj2006.0093
PG 9
WC Soil Science
SC Agriculture
GA 147CJ
UT WOS:000244980700042
ER

PT J
AU Hannel, TS
   Otu, EO
   Jensen, MP
AF Hannel, Thaddaeus S.
   Otu, Emmanuel O.
   Jensen, Mark P.
TI Thermochemistry of the extraction of bismuth(III) with bis(2-ethylhexyl)
   phosphoric and 2-ethyhexyl-phenylphosphonic acids
SO SOLVENT EXTRACTION AND ION EXCHANGE
LA English
DT Article
DE extraction; bismuth; thermodynamics parameters; calorimetry; temperature
   coefficient of extraction; stoichiometry
ID LIQUID DISTRIBUTION REACTIONS; ESTERS; IONS; THERMODYNAMICS; LANTHANIDE;
   COMPLEXES; SYSTEMS; NI(II); CO(II); WATER
AB The extraction of bismuth(III) from perchloric acid medium by bis(2-ethylhexyl) phosphoric (HDEHP) and 2-ethylhexyl-phenylphosphonic (HEH[Ph]P) acids dissolved in o-xylene was studied in the temperature range 25-60 degrees C. The extractions were investigated as a function of the aqueous perchloric acid concentration and organic phase extractant concentration. The slopes of the average extractant dependencies and acid dependencies were 2.8 and -2.9, respectively, for both extraction systems, and the extraction stoichiometries did not change with temperature. Enthalpy, entropy and free energy changes of the extraction process were derived from the measured extraction coefficients across this temperature range. The enthalpy change for the extraction with HDEHP was also studied directly by calorimetric measurement at 25 degrees C. The extractability of bismuth by both extractants is enthalpy controlled. The enthalpy change for extraction from 1 M (Na/H) ClO4 calculated from calorimetric data at low metal loading, -10.7 +/- 1.0 kJ/mol, compares favorably to that obtained from the temperature dependence of the extraction coefficient, -11.2 +/- 1.6 kJ/ mol. Under our conditions, the extraction of Bi(III) by HDEHP is enthalpy driven with an unfavorable entropy, while the enthalpy and entropy make favorable contributions of similar magnitude to the extraction by HEH[Ph]P.
C1 Indiana Univ SE, Sch Nat Sci, Dept Chem, New Albany, IN 47150 USA.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Otu, EO (reprint author), Indiana Univ SE, Sch Nat Sci, Dept Chem, New Albany, IN 47150 USA.
EM eotu@ius.edu
RI Jensen, Mark/G-9131-2012
OI Jensen, Mark/0000-0003-4494-6693
NR 35
TC 8
Z9 8
U1 0
U2 3
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA
SN 0736-6299
J9 SOLVENT EXTR ION EXC
JI Solvent Extr. Ion Exch.
PD MAR
PY 2007
VL 25
IS 2
BP 241
EP 256
DI 10.1080/07366290601169493
PG 16
WC Chemistry, Multidisciplinary
SC Chemistry
GA 146HH
UT WOS:000244924600005
ER

PT J
AU Zhang, DX
   Lu, ZM
   Chen, Y
AF Zhang, Dongxiao
   Lu, Zhiming
   Chen, Yan
TI Dynamic reservoir data assimilation with an efficient, dimension-reduced
   Kalman filter
SO SPE JOURNAL
LA English
DT Article; Proceedings Paper
CT 2005 SPE Annual Technical Conference and Exhibition
CY OCT 09-12, 2005
CL Dallas, TX
SP Soc Petr Engineers
ID FLOW; TRANSMISSIVITY; SIMULATIONS
AB Kalman filter-based methods have been widely applied for assimilating new measurements to continuously update the estimate of state variables, such as reservoir properties and responses. The standard Kalman filtering scheme requires computing and storing the covariance matrix of state variables, which is computationally expensive for large-scale problems with millions of gridblocks. In the ensemble Kalman filter (EnKF), this problem is alleviated with sampling from a limited number of realizations and computing the required subset of the covariance matrix at each update. However, the goodness of the (ensemble) covariance approximated from the limited ensemble depends on the number of realizations used and the representativity of a given ensemble. In this study, we propose an efficient, dimension-reduced Kalman filtering scheme based on Karhunen-Loeve (KL) and other orthogonal polynomial decompositions of the state variables. We consider flow in heterogeneous reservoirs with spatially variable permeability. The reservoir responses such as pressure are measured at some locations at various time intervals. The aim is to dynamically characterize the reservoir properties and to predict the reservoir performance and its uncertainty at future times. In our scheme, the covariance of the reservoir properties is approximated by a small set of eigenvalues and eigenfunctions using the KL decomposition and the reconstruction of the covariance from the KL decomposition can be done whenever needed. In each update, the forecast step is solved using the KL-based moment method, giving a set of functions from which the mean and covariance of the state variables can be constructed, when needed. The statistics of both the reservoir properties and the reservoir responses are then updated with the available measurements at this time using the auto- and cross-covariances obtained from the forecast step. The new approach is illustrated on a heterogeneous reservoir with dynamic measurements and the results are compared with those from the EnKF method, in terms of accuracy and efficiency.
C1 Univ Oklahoma, Norman, OK 73019 USA.
   Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA.
RP Zhang, DX (reprint author), Univ Oklahoma, Norman, OK 73019 USA.
RI Zhang, Dongxiao/D-5289-2009; Chen, Yan/E-2330-2011; 
OI Zhang, Dongxiao/0000-0001-6930-5994; Lu, Zhiming/0000-0001-5800-3368
NR 22
TC 29
Z9 29
U1 0
U2 2
PU SOC PETROLEUM ENG
PI RICHARDSON
PA 222 PALISADES CREEK DR,, RICHARDSON, TX 75080 USA
SN 1086-055X
J9 SPE J
JI SPE J.
PD MAR
PY 2007
VL 12
IS 1
BP 108
EP 117
DI 10.2118/95277-PA
PG 10
WC Engineering, Petroleum
SC Engineering
GA 150PO
UT WOS:000245228900009
ER

PT J
AU Peairs, DM
   Inman, DJ
   Park, G
AF Peairs, Daniel M.
   Inman, Daniel J.
   Park, Gyuhae
TI Circuit analysis of impedance-based health monitoring of beams using
   spectral elements
SO STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
LA English
DT Article
DE impedance method; spectral element method; high frequency; health
   monitoring; self-sensing; piezoelectric
ID PIEZOELECTRIC ACTUATORS; CRACK DETECTION; SENSORS
AB A model is generally not needed for the basic damage identification problem when using the electromechanical impedance-based method of structural health monitoring (SHM). However, modeling becomes necessary when more information is needed for more complex functions of the SHM system, such as estimation of remaining life. In addition, suitable models would aid in more accurately identifying and locating damage and in designing the SHM system. Since impedance-based SHM relies on high frequency excitation of the structure using piezoelectric patches, finite element modeling may not be computationally efficient. In this study, the spectral element method (SEM) is used in combination with electric circuit analysis for impedance modeling. SEM more accurately models higher frequency vibrations than finite element methods since the mass is modeled exactly and it incorporates higher order models more easily. Simulations of sensor multiplexing, high frequency response, and the inclusion of damage are presented. Experimental verification is also included.
C1 Virginia Polytech Inst & State Univ, Ctr Intelligent Mat Syst & Struct, Blacksburg, VA 24061 USA.
   Los Alamos Natl Lab, Engn Sci & Applicat Div, Los Alamos, NM 87545 USA.
RP Peairs, DM (reprint author), Virginia Polytech Inst & State Univ, Ctr Intelligent Mat Syst & Struct, 310 Durham Hall,Mailcode 0261, Blacksburg, VA 24061 USA.
EM dpeairs@vt.edu
NR 34
TC 25
Z9 26
U1 1
U2 6
PU SAGE PUBLICATIONS LTD
PI LONDON
PA 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
SN 1475-9217
EI 1741-3168
J9 STRUCT HEALTH MONIT
JI Struct. Health Monit.
PD MAR
PY 2007
VL 6
IS 1
BP 81
EP 94
DI 10.1177/1475921707072621
PG 14
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 147XP
UT WOS:000245039400006
ER

PT J
AU Seeliger, MA
   Nagar, B
   Frank, F
   Cao, X
   Henderson, MN
   Kuriyan, J
AF Seeliger, Markus A.
   Nagar, Bhushan
   Frank, Filipp
   Cao, Xiaoxian
   Henderson, M. Nidanie
   Kuriyan, John
TI c-Src binds to the cancer drug imatinib with an inactive Abl/c-Kit
   conformation and a distributed thermodynamic penalty
SO STRUCTURE
LA English
DT Article
ID TYROSINE KINASE INHIBITOR; CHRONIC MYELOID-LEUKEMIA; GROWTH-FACTOR
   RECEPTOR; CRYSTAL-STRUCTURE; STRUCTURAL BASIS; BCR-ABL; REGULATORY
   INTERACTIONS; STI-571 INHIBITION; DOMAIN; ACTIVATION
AB The cancer drug imatinib inhibits the tyrosine kinases c-Abl, c-Kit, and the PDGF receptor. Imatinib is less effective against c-Src, which is difficult to understand because residues interacting with imatinib in crystal structures of Abl and c-Kit are conserved in c-Src. The crystal structure of the c-Src kinase domain in complex with imatinib closely resembles that of Abl center dot imatinib and c-Kit center dot imatinib, and differs significantly from the inactive "Src/CDK" conformation of the Src family kinases. Attempts to increase the affinity of c-Src for imatinib by swapping residues with the corresponding residues in Abl have not been successful, suggesting that the thermodynamic penalty for adoption of the imatinib-binding conformation by c-Src is distributed over a broad region of the structure. Two mutations that are expected to destabilize the inactive Src/CDK conformation increase drug sensitivity 15-fold, suggesting that the free-energy balance between different inactive states is a key to imatinib binding.
C1 Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA.
RP Kuriyan, J (reprint author), Univ Calif Berkeley, Howard Hughes Med Inst, Berkeley, CA 94720 USA.
EM kuriyan@berkeley.edu
RI Henderson, M Nidanie/C-6871-2008; Nagar, Bhushan/C-1297-2010; Seeliger,
   Markus/D-6409-2013
NR 41
TC 122
Z9 124
U1 0
U2 18
PU CELL PRESS
PI CAMBRIDGE
PA 1100 MASSACHUSETTS AVE, CAMBRIDGE, MA 02138 USA
SN 0969-2126
J9 STRUCTURE
JI Structure
PD MAR
PY 2007
VL 15
IS 3
BP 299
EP 311
DI 10.1016/j.str.2007.01.015
PG 13
WC Biochemistry & Molecular Biology; Biophysics; Cell Biology
SC Biochemistry & Molecular Biology; Biophysics; Cell Biology
GA 155ZK
UT WOS:000245617400007
PM 17355866
ER

PT J
AU Hanisch, J
   Kozlova, N
   Cai, C
   Nenkov, K
   Fuchs, G
   Holzapfel, B
AF Haenisch, J.
   Kozlova, N.
   Cai, C.
   Nenkov, K.
   Fuchs, G.
   Holzapfel, B.
TI Determination of the irreversibility field of YBCO thin films from
   pulsed high-field measurements
SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY
LA English
DT Article
ID HIGH-MAGNETIC-FIELD; COATED CONDUCTORS; PHASE-DIAGRAM; YBA2CU3O7-DELTA
   FILMS; CURRENT DENSITIES; PINNING CENTERS; NANODOTS
AB A thin-film YBa2Cu3O7-delta sample has been investigated with regard to its irreversibility field at low temperatures. For these investigations, the magnetic-field dependence of the electrical resistance R( H) was measured at various temperatures in pulsed magnetic fields up to 50 T. These curves show an unusual, very rapid increase of R even at low fields. We describe a method of extracting H-irr that is comparable to measurements in static magnetic fields. The irreversibility line shows the same, nearly linear behaviour at low temperatures as bulk YBa2Cu3O7-delta samples and a power-law dependence at higher temperatures. These two regions are also clearly visible in pinning force plots.
C1 IFW Dresden, Inst Met Mat, D-01171 Dresden, Germany.
   Los Alamos Natl Lab, Supercond Technol Ctr, Los Alamos, NM 87545 USA.
   Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China.
RP Hanisch, J (reprint author), IFW Dresden, Inst Met Mat, POB 270116, D-01171 Dresden, Germany.
EM haenisch@lanl.gov; n.v.kozlova@ifw-dresden.de
RI Holzapfel, Bernhard/D-3669-2009; Hanisch, Jens/D-8503-2011
NR 27
TC 9
Z9 9
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-2048
J9 SUPERCOND SCI TECH
JI Supercond. Sci. Technol.
PD MAR
PY 2007
VL 20
IS 3
BP 228
EP 231
DI 10.1088/0953-2048/20/3/019
PG 4
WC Physics, Applied; Physics, Condensed Matter
SC Physics
GA 145TK
UT WOS:000244887300021
ER

PT J
AU Hrbek, J
   Chang, ZP
   Hoffmann, FM
AF Hrbek, Jan
   Chang, Zhipeng
   Hoffmann, Friedrich M.
TI The adsorption of 1,3-butadiene on Ag(111): A TPD/IRAS study and
   importance of lateral interactions
SO SURFACE SCIENCE
LA English
DT Article
DE 1,3-butadiene; Ag(111); infrared reflection absorption spectroscopy;
   adsorption; temperature programmed desorption
ID HIGH-ENERGY CONFORMER; 2ND STABLE CONFORMER; DESORPTION-KINETICS; CO;
   PHASE; SPECTRUM; SURFACES; ALKENES; NI(111); RU(001)
AB Temperature programmed desorption (TPD) and infrared reflection absorption spectroscopy (IRAS) have been used to study the adsorption, desorption, molecular orientation and conformation of 1,3-butadiene on Ag(111) at 80 K. Butadiene adsorbs weakly as an s-trans conformer with the first layer oriented parallel to the silver surface and desorbs without decomposition. A very narrow line shape of the out-of-plane modes at low submonolayer coverage indicates molecular ordering within the diluted adsorbed layer, presumably through weak pi-bonding interaction with the surface and intermolecular repulsive interaction. Compression within the first layer at coverages above 0.5 ML is driven by repulsive interaction as seen in both TPD and IRAS data. The IR intensity rollover and peak broadening, together with a significant shift in the TPD peak to lower temperature, indicate a reorientation of the butadiene molecule. Adsorption in the second- and multilayer is characterized by distinct IR frequency shifts and crystal field splitting effects similar to those reported for solid butadiene. (c) 2007 Elsevier B.V. All rights reserved.
C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
   Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England.
   CUNY, BMCC, Dept Sci, New York, NY 10007 USA.
RP Hrbek, J (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA.
EM hrbek@bnl.gov
RI Hrbek, Jan/I-1020-2013
NR 35
TC 2
Z9 2
U1 2
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD MAR 1
PY 2007
VL 601
IS 5
BP 1409
EP 1418
DI 10.1016/j.susc.2007.01.005
PG 10
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA 148HK
UT WOS:000245065100034
ER

PT J
AU DeFlaun, MF
   Fredrickson, JK
   Dong, H
   Pfiffner, SM
   Onstott, TC
   Balkwill, DL
   Streger, SH
   Stackebrandt, E
   Knoessen, S
   van Heerden, E
AF DeFlaun, M. F.
   Fredrickson, J. K.
   Dong, H.
   Pfiffner, S. M.
   Onstott, T. C.
   Balkwill, D. L.
   Streger, S. H.
   Stackebrandt, E.
   Knoessen, S.
   van Heerden, E.
TI Isolation and characterization of a Geobacillus thermoleovorans strain
   from an ultra-deep South African gold mine
SO SYSTEMATIC AND APPLIED MICROBIOLOGY
LA English
DT Article
DE Geobacillus thermoleovorans; extremophiles; thermophilic bacilli;
   lipase; deep subsurface bacteria
ID BACILLUS-THERMOLEOVORANS; PHYLOGENETIC CHARACTERIZATION; THERMOPHILIC
   BACILLI; RENATURATION RATES; DNA HYBRIDIZATION; RAPID METHOD; SP NOV.;
   THERMODENITRIFICANS; PURIFICATION; BACTERIA
AB A thermophilic facultative bacterial isolate was recovered from 3.2 kin depth in a gold mine in South Africa. This isolate, designated GE-7, was cultivated from pH 8.0, 50 degrees C water from a dripping fracture near the top of an exploration tunnel. GE-7 grows optimally at 65 degrees C and pH 6.5 on a wide range of carbon substrates including cellobiose, hydrocarbons and lactate. In addition to O-2, GE-7 also utilizes nitrate as an electron acceptor. GE-7 is a long rod-shaped bacterium (4-6 mu m long x 0.5 mu m wide) with terminal endospores and flagella. Phylogenetic analysis of GE-7 16S rDNA sequence revealed high sequence similarity with G. thermoleovorans DSM 5366(T) (99.6%), however, certain phenotypic characteristics of GE-7 were distinct from this and other previously described strains of G. thermoleovorans. (c) 2006 Elsevier GmbH. All rights reserved.
C1 Geosyntec Consultants, Lawrenceville, NJ 08648 USA.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
   Miami Univ, Oxford, OH 45056 USA.
   Univ Tennessee, Knoxville, TN 37996 USA.
   Princeton Univ, Princeton, NJ 08544 USA.
   Florida State Univ, Tallahassee, FL 32306 USA.
RP DeFlaun, MF (reprint author), Geosyntec Consultants, 3131 Princeton Pike,Bldg 1B,Suite 205, Lawrenceville, NJ 08648 USA.
EM mdeflaun@geosyntec.com
NR 55
TC 21
Z9 23
U1 1
U2 11
PU ELSEVIER GMBH, URBAN & FISCHER VERLAG
PI JENA
PA OFFICE JENA, P O BOX 100537, 07705 JENA, GERMANY
SN 0723-2020
J9 SYST APPL MICROBIOL
JI Syst. Appl. Microbiol.
PD MAR
PY 2007
VL 30
IS 2
BP 152
EP 164
DI 10.1016/j.syapm.2006.04.003
PG 13
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA 145HU
UT WOS:000244856700008
PM 16709445
ER

PT J
AU Timchalk, C
   Campbell, JA
   Liu, GD
   Lin, YH
   Kousba, AA
AF Timchalk, Charles
   Campbell, James A.
   Liu, Guodong
   Lin, Yuehe
   Kousba, Ahmed A.
TI Development of a non-invasive biomonitoring approach to determine
   exposure to the organophosphorus insecticide chlorpyrifos in rat saliva
SO TOXICOLOGY AND APPLIED PHARMACOLOGY
LA English
DT Article
DE chlorpyrifos; saliva; non-invasive; biomonitoring; PBPK/PD
ID MICROANALYTICAL SYSTEM; OCCUPATIONAL EXPOSURE; PLASMA-CONCENTRATION;
   PRESCHOOL-CHILDREN; RISK-ASSESSMENT; TOXIC METALS;
   3,5,6-TRICHLORO-2-PYRIDINOL; PESTICIDES; EXCRETION; LEAD
AB Non-invasive biomonitoring approaches are being developed using reliable portable analytical systems to quantify dosimetry utilizing readily obtainable body fluids, such as saliva. In the current study, rats were given single oral gavage doses (1, 10, or 50 mg/kg) of the insecticide chlorpyrifos (CPF). Saliva,and blood were then collected from groups of animals (4/time-point) at 3, 6, and 12 It post-dosing, and were analyzed for the CPF metabolite trichloropyridinol (TCP). Trichloropyridinol was detected in both blood and saliva at all doses and the TCP concentration in blood exceeded saliva, although the kinetics in blood and saliva were comparable. A physiologically based pharmacokinetic and pharmacodynamic (PBPK/PD) model for CPF incorporated a compartment model to describe the time-course of TCP in blood and saliva. The model adequately simulated the experimental results over the dose ranges evaluated. A rapid and sensitive sequential injection (SI) electrochemical immunoassay was developed to monitor TCP, and the reported detection limit for TCP was 6 ng/L (in water). Computer model simulation in the range of the Allowable Daily Intake (ADI) or Reference Dose (RfD) for CPF (0.01-0.003 mg/kg/day) suggests that the electrochemical immunoassay has adequate sensitivity to detect and quantify TCP in saliva at these low exposure levels. However, to validate this approach, further studies are needed to more fully understand the pharmacokinetics of CPF and TCP excretion in saliva. These initial findings suggest that the utilization of saliva as a biomonitoring matrix, coupled to real-time quantitation and PBPK/PD modeling represents a novel approach with broad application for evaluating both occupational and environmental exposures to CPF. (c) 2006 Elsevier Inc. All rights reserved.
C1 Pacific NW Natl Lab, Ctr Biol Monitoring & Modeling, Richland, WA 99352 USA.
   TargeGen Inc, San Diego, CA 92121 USA.
RP Timchalk, C (reprint author), Pacific NW Natl Lab, Ctr Biol Monitoring & Modeling, 902 Batelle Blvd POB 999,MSIN P7-59, Richland, WA 99352 USA.
EM charles.timchalk@pnl.gov
RI Lin, Yuehe/D-9762-2011
OI Lin, Yuehe/0000-0003-3791-7587
FU NIOSH CDC HHS [R01 OH003629-03, R01 OH008173-01]
NR 47
TC 21
Z9 24
U1 1
U2 9
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0041-008X
J9 TOXICOL APPL PHARM
JI Toxicol. Appl. Pharmacol.
PD MAR
PY 2007
VL 219
IS 2-3
BP 217
EP 225
DI 10.1016/j.taap.2006.10.002
PG 9
WC Pharmacology & Pharmacy; Toxicology
SC Pharmacology & Pharmacy; Toxicology
GA 145VF
UT WOS:000244893200017
PM 17118418
ER

PT J
AU McLeod, KW
   Ciravolo, TG
AF McLeod, Kenneth W.
   Ciravolo, Thomas G.
TI Cobalt uptake by Nyssa aquatica, N-sylvatica var. biflora, and Taxodium
   distichum seedlings
SO WETLANDS
LA English
DT Article
DE cypress; environmental contamination; plant production; tupelo
ID ACCUMULATION; ELEMENTS; PLANTS
AB Cobalt is a minor contaminant in wetlands that has been linked to accumulation by Nyssa species for many years, though the evidence is largely anecdotal. We examined cobalt uptake characteristics from cobalt-enriched potting soil by Nyssa aquatica (water tupelo), N. sylvatica var. biflora (swamp tupelo), and Taxodium distichum (baldcypress), codominant canopy species of wetland forests of the southeastern United States. Seedlings were grown in 10 1 pots for two growing seasons. Cobalt additions (up to 100 mg/pot) did not affect biomass production of leaves, stems, or roots of the three species. Height was significantly different among treatments within a species, but no treatment was different from the control. treatment with no added cobalt. Leaf cobalt concentrations were greater in N. sylvatica var. biflora than N. aquatica during the first year, but similar during the second year. Cobalt concentrations declined from the first to second years for T distichum leaves. In the 100 mg/pot treatment, leaf cobalt concentrations of both Nyssa species during the second year were 150 times greater than that of T distichum. Elevated cobalt uptake by Nyssa species is apparently a function of special mechanisms of the genera and not a habitat characteristic.
C1 Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
RP McLeod, KW (reprint author), Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.
EM mcleod@srel.edu
NR 13
TC 3
Z9 5
U1 1
U2 12
PU SOC WETLAND SCIENTISTS
PI LAWRENCE
PA 810 E TENTH ST, P O BOX 1897, LAWRENCE, KS 66044 USA
SN 0277-5212
J9 WETLANDS
JI Wetlands
PD MAR
PY 2007
VL 27
IS 1
BP 40
EP 43
DI 10.1672/0277-5212(2007)27[40:CUBNAN]2.0.CO;2
PG 4
WC Ecology; Environmental Sciences
SC Environmental Sciences & Ecology
GA 155XE
UT WOS:000245611100004
ER

PT J
AU Malcolm, DJ
   Laird, DL
AF Malcolm, David J.
   Laird, Daniel L.
TI Extraction of equivalent beam properties from blade models
SO WIND ENERGY
LA English
DT Article
DE wind turbines; blades; beam properties; stiffness matrix; 3D effects;
   finite element model
AB A method is presented for extracting the equivalent beam properties from a finite element model of a wind turbine blade so that full aeroelastic models can be constructed more reliably. The method is based on applying unit loads at the tip of the blade and processing the resulting nodal displacements to generate the 6 x 6 stiffness matrices for the specified beam discretization. The finite element model can comprise shell and/or solid elements, but the use of shell elements with centroids offset from the surface has been shown to produce erroneous torsional, stiffness values. The method includes all three-dimensional effects such as shear and warping as well as flap-twist coupling, and these are demonstrated in a series of validation examples. The process will accommodate blades with curvature in one or both directions and has the added advantage of identifying the centre of mass, elastic centre, principal directions and shear centre. Published in 2006 by John Wiley & Sons, Ltd.
C1 Global Energy Concepts LLC, Seattle, WA 98101 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Malcolm, DJ (reprint author), Global Energy Concepts LLC, 1809 7th Ave 900, Seattle, WA 98101 USA.
EM dmalcolm@globalenergyconcepts.com
NR 18
TC 21
Z9 22
U1 0
U2 2
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1095-4244
J9 WIND ENERGY
JI Wind Energy
PD MAR-APR
PY 2007
VL 10
IS 2
BP 135
EP 157
DI 10.1002/we.213
PG 23
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA 154BG
UT WOS:000245481200003
ER

PT J
AU Schreck, SJ
   Sorensen, NN
   Robinson, MC
AF Schreck, Scott J.
   Sorensen, Niels N.
   Robinson, Michael C.
TI Aerodynamic structures and processes in rotationally augmented flow
   fields
SO WIND ENERGY
LA English
DT Article
DE wind turbine; blade aerodynamics; rotational augmentation; stall delay;
   post-stall; flow topology
ID WIND TURBINE; BLADE
AB Rotational augmentation of horizontal axis wind turbine blade aerodynamics currently remains incompletely characterized and understood. To address this, the present study concurrently analysed experimental measurements and computational predictions, both of which were unique and of high quality. Experimental measurements consisted of surface pressure data statistics used to infer sectional boundary layer state and to quantify normal force levels. Computed predictions included high-resolution boundary layer topologies and detailed above-surface flow field structures. This synergy was exploited to reliably identify and track pertinent features in the rotating blade boundary layer topology as they evolved in response to varying wind speed. Subsequently, boundary layer state was linked to above-surface flow field structure and used to deduce mechanisms; underlying augmented aerodynamic force production during rotating conditions. Copyright (C) 2007 John Wiley & Sons, Ltd.
C1 NRELs Natl Wind Technol Ctr, Golden, CO 80401 USA.
   Riso Natl Lab, DK-4000 Roskilde, Denmark.
RP Schreck, SJ (reprint author), NRELs Natl Wind Technol Ctr, 1617 Cole Blvd, Golden, CO 80401 USA.
EM scott_schreck@nrel.gov
RI Sorensen, Niels Normark/C-5516-2011
NR 54
TC 25
Z9 25
U1 1
U2 3
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 1095-4244
J9 WIND ENERGY
JI Wind Energy
PD MAR-APR
PY 2007
VL 10
IS 2
BP 159
EP 178
DI 10.1002/we.214
PG 20
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA 154BG
UT WOS:000245481200004
ER

PT J
AU Etschmann, BE
   Ryan, CG
   Vogt, S
   Maser, J
   Brugger, J
   Harland, CL
   Legnini, D
AF Etschmann, B. E.
   Ryan, C. G.
   Vogt, S.
   Maser, J.
   Brugger, J.
   Harland, C. L.
   Legnini, D.
TI Selective x-ray Bragg spectrometry: optimizing fluorescence microprobe
   sensitivity for precious metals
SO X-RAY SPECTROMETRY
LA English
DT Article; Proceedings Paper
CT European X-Ray Spectrometry Conference (EXRS 2006)
CY JUN 19-23, 2006
CL Paris, FRANCE
ID NUCLEAR MICROPROBE; FLUID INCLUSIONS; GOLD; DEPOSITS; PIXE;
   ARSENOPYRITE; CRYSTALS; HOPG
AB This instrument development project was aimed at developing an x-ray spectrometer configuration for the x-ray fluorescence microprobe optimized for the detection of precious metals in geological and biological samples with the objective of improving detection limits and reducing interference from major elements and the scattered beam. The approach used Bragg diffraction from a surface shaped to a log-spiral to focus x-rays of a particular energy onto a solid-state detector. The result is an enhancement of the precious metal lines within the relatively narrow bandpass of the Bragg crystal surface and suppression of interfering elements and detector artefacts, such as tailing and escape peaks arising from intense elemental lines and scattered photons. This combined enhancement resulted in a factor of 3 improvement in the count rates at the optimized energy. Combined with the reduction in background, this results in an order of magnitude improvement of the Au detection limits for samples of geological significance. Copyright (C) 2007 John Wiley & Sons, Ltd.
C1 Univ Melbourne, CSIRO Explorat & Min, Sch Phys, Parkville, Vic 3010, Australia.
   Argonne Natl Lab, Expt Phys Div, Adv Photon Source, Argonne, IL 60439 USA.
   S Australian Museum, Adelaide, SA 5000, Australia.
   Univ Adelaide, Sch Earth & Environm Sci, Adelaide, SA 5005, Australia.
   Argonne Natl Lab, Australian Synchrotron Res Program ANSTO, Adv Photon Source, Argonne, IL 60439 USA.
RP Etschmann, BE (reprint author), Univ Melbourne, CSIRO Explorat & Min, Sch Phys, Parkville, Vic 3010, Australia.
EM Barbara.etschmann@csiro.au
RI Ryan, Chris/A-6032-2011; Etschmann, Barbara/H-7731-2012; Maser,
   Jorg/K-6817-2013; Vogt, Stefan/B-9547-2009; Vogt, Stefan/J-7937-2013;
   Brugger, Joel/C-7113-2008
OI Ryan, Chris/0000-0003-2891-3912; Vogt, Stefan/0000-0002-8034-5513; Vogt,
   Stefan/0000-0002-8034-5513; Brugger, Joel/0000-0003-1510-5764
NR 24
TC 3
Z9 3
U1 0
U2 3
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0049-8246
J9 X-RAY SPECTROM
JI X-Ray Spectrom.
PD MAR-APR
PY 2007
VL 36
IS 2
BP 111
EP 121
DI 10.1002/xrs.937
PG 11
WC Spectroscopy
SC Spectroscopy
GA 146IP
UT WOS:000244928000010
ER

PT J
AU Lenhart, JL
   Fischer, D
   Sambasivan, S
   Lin, EK
   Wu, WL
   Guerrero, DJ
   Wang, YB
   Puligadda, R
AF Lenhart, Joseph L.
   Fischer, Daniel
   Sambasivan, Sharadha
   Lin, Eric K.
   Wu, Wen-Li
   Guerrero, Douglas J.
   Wang, Yubao
   Puligadda, Rama
TI Understanding deviations in lithographic patterns near interfaces:
   Characterization of bottom anti-reflective coatings (BARC) and the
   BARC-resist interface
SO APPLIED SURFACE SCIENCE
LA English
DT Article
DE anti-reflective coating; photolithography; footing; undercutting; BARC;
   photoresist; lithography; interface
ID CHEMICALLY AMPLIFIED RESISTS; GLASS-TRANSITION TEMPERATURE; ULTRATHIN
   POLYMER-FILMS; THERMAL-PROPERTIES; NETWORK FILMS; THIN-FILMS; THICKNESS;
   DENSITY
AB Interactions between a bottom anti-reflective coating (BARC) and a photoresist can critically impact lithographic patterns. For example, a lithographic pattern can shrink or spread near a BARC interface, a process called undercutting or footing respectively, due to incompatibility between the two materials. Experiments were conducted on two industrial BARC coatings in an effort to determine the impact of BARC surface chemistry on the footing and undercutting phenomena. The BARC coatings were characterized by near edge X-ray absorption fine structure (NEXAFS), contact angle measurements, and neutron and X-ray reflectivity. Contact angle measurement using a variety of fluids showed that the fluid contact angles were independent of the type of BARC coating or the BARC processing temperature. NEXAFS measurements showed that the surface chemistry of each BARC was also independent of the processing temperature. These results suggest that acid-base interactions at the BARC-resist interface are not the cause of the footing-undercutting phenomena encountered in lithographic patterns. (c) 2006 Published by Elsevier B.V.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
   Natl Inst Stand & Technol, Gaithersburg, MD 20874 USA.
RP Lenhart, JL (reprint author), Sandia Natl Labs, POB 5800 MS0888, Albuquerque, NM 87185 USA.
EM jllenha@sandia.gov
NR 44
TC 9
Z9 9
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD FEB 28
PY 2007
VL 253
IS 9
BP 4166
EP 4175
DI 10.1016/j.apsusc.2006.09.022
PG 10
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 144NE
UT WOS:000244802300011
ER

PT J
AU Yang, HX
   Xu, LF
   Gu, CZ
   Zhang, SB
AF Yang, Hongxin
   Xu, Lifang
   Gu, Changzhi
   Zhang, S. B.
TI First-principles study of oxygenated diamond (001) surfaces with and
   without hydrogen
SO APPLIED SURFACE SCIENCE
LA English
DT Article
DE diamond surface; oxygenated; hydroxylated; stability; first principles
ID TEMPERATURE-PROGRAMMED DESORPTION; SPECTROSCOPY; WATER; RECONSTRUCTION;
   OXIDATION; PLASMA; CARBON; GAS
AB The structural characterization of oxygenated diamond (001) surface with and without H-presence has been investigated by the density-functional theory within the generalized gradient approximation and the plane-wave pseudopotential method. It is shown that, without the H, the O-bridge site has lower energy than the O-on-top site for both half and fully monolayer (ML) oxygen coverage. For hydrogenated diamond (001) surfaces, we found for half ML O coverage, a more stable (2 x 2):0.5H&0.5(OH) phase than the previously reported (2 x 1):0.5H&0.5(OH) phase [H. Tamura, H. Zhou, K. Sugisako, Y. Yokoi, S. Takami, M. Kubo, K. Teraishi, A. Miyamoto, A. Imamura, M.N. Gamo, T. Ando, Phys. Rev. B 61 (2000) 11025]. Furthermore, at one ML O coverage, a (2 x 2):(OH) phase is the most stable structure than the previously reported (2 x 1):(OH) phase. With the increase of the (OH) coverage, the importance of the hydrogen bonds increases in terms of stabilizing these structures. (c) 2006 Elsevier B.V. All rights reserved.
C1 Chinese Acad Sci, Inst Phys, Natl Lab Condensed Matter Phys, Beijing 100080, Peoples R China.
   Jilin Univ, Natl Lab Superhard Mat, Changchun 130012, Peoples R China.
   Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Gu, CZ (reprint author), Chinese Acad Sci, Inst Phys, Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China.
EM czgu@aphy.iphy.ac.cn
RI Krausnick, Jennifer/D-6291-2013; Zhang, Shengbai/D-4885-2013
OI Zhang, Shengbai/0000-0003-0833-5860
NR 41
TC 7
Z9 7
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD FEB 28
PY 2007
VL 253
IS 9
BP 4260
EP 4266
DI 10.1016/j.apsusc.2006.09.035
PG 7
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
   Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA 144NE
UT WOS:000244802300024
ER

PT J
AU Satyapal, S
   Petrovic, J
   Read, C
   Thomas, G
   Ordaz, G
AF Satyapal, Sunita
   Petrovic, John
   Read, Carole
   Thomas, George
   Ordaz, Grace
TI The US Department of Energy's National Hydrogen Storage Project:
   Progress towards meeting hydrogen-powered vehicle requirements
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT Korea Conference on Innovative Science and Technology (KCIST-2005)
CY DEC 04-07, 2005
CL Gyeongju, SOUTH KOREA
SP Korea Federat Sci & Technol Soc
DE hydrogen storage; hydrogen storage review; hydrogen storage targets;
   compressed hydrogen tanks; conformable high-pressure tanks; metal
   hydrides; chemical hydrides; chemical hydrogen carriers; carbon;
   nanostructured materials; high surface area adsorbents; sorbents
ID BOROHYDRIDE; MGH2
AB Hydrogen storage is widely recognized as a critical enabling technology for the successful commercialization and market acceptance of hydrogen powered vehicles. Storing sufficient hydrogen on-board a wide range of vehicle platforms, while meeting all consumer requirements (driving range, cost, safety, performance, etc.), without compromising passenger or cargo space, is a tremendous technical challenge. The U.S. Department of Energy (DOE), in collaboration with automotive industry partners, established specific technical targets for on-board hydrogen storage systems to focus R&D and to stimulate research on hydrogen storage. In order to achieve these long-term targets, DOE launched a "Grand Challenge" to the scientific community in 2003. Based on a competitively selected portfolio, DOE established a "National Hydrogen Storage Project" in the U.S. for R&D in the areas of advanced metal hydrides, chemical hydrogen storage, carbon-based and high surface area sorbent materials, as well as new materials and concepts. The current status of vehicular hydrogen storage is reviewed and research associated with the National Hydrogen Storage Project is discussed. Future DOE plans through the International Partnership for the Hydrogen Economy (IPHE) are also presented. Published by Elsevier B.V.
C1 US DOE, Hydrogen Program, Washington, DC 20585 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Sandia Natl Labs, Livermore, CA 94550 USA.
RP Satyapal, S (reprint author), US DOE, Hydrogen Program, 1000 Independence Ave SW, Washington, DC 20585 USA.
EM Sunita.Satyapal@ee.doe.gov
NR 32
TC 512
Z9 527
U1 24
U2 164
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD FEB 28
PY 2007
VL 120
IS 3-4
BP 246
EP 256
DI 10.1016/j.cattod.2006.09.022
PG 11
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 139EY
UT WOS:000244416300002
ER

PT J
AU Aciego, SM
   DePaolo, DJ
   Kennedy, BM
   Lamb, MP
   Sims, KWW
   Dietrich, WE
AF Aciego, Sarah M.
   DePaolo, Donald J.
   Kennedy, B. M.
   Lamb, Michael P.
   Sims, Kenneth W. W.
   Dietrich, William E.
TI Combining [He-3] cosmogenic dating with U-Th/He eruption ages using
   olivine in basalt
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE U-Th/He; cosmogenic helium; Snake River Basalts; Idaho; olivine
ID IONIZATION MASS-SPECTROMETRY; SNAKE-RIVER-PLAIN; PRODUCTION-RATES;
   VOLCANIC-ROCKS; LAVA FLOWS; DIFFUSION; HELIUM; AR-40/AR-39; SURFACES;
   IDAHO
AB This paper presents new U-Th/He crystallization and He-3 exposure ages on olivine for a suite of basalt samples from the Snake River Plain, Idaho. The results provide the first demonstration that U-Th/He geochronology can be successfully applied to Late Quaternary basalts using measurements of olivine phenocrysts as opposed to U-rich minerals. The approach employs abrasion to remove the outer rinds of olivine crystals to avoid problems with He-4 implantation from the groundmass, and a specially designed extraction system that allows U, Th and He concentrations and isotopic compositions to be measured on the same olivine grains. We demonstrate the viability of the U-Th/He technique on basalts with ages of 373 ka and 3400 ka previously dated by Ar-Ar, and show that concurrent measurements of U-Th-He-4 ages and He-3 cosmogenic exposure ages improve the accuracy of both methods. The combined U-Th-(HeHe)-He-4-He-3 technique is applied to a series of boulders and flows from Box Canyon near Hagerman, Idaho, to evaluate the ages of the basalts and to use exposure ages to make inferences about the age and mode of formation of the canyon. The U-Th/He ages of the Box Canyon basalts are between 86 +/- 12 ka and 130 +/- 12 ka (1-sigma errors) and suggest at least two periods of eruption. The ages are similar to a ca. 95 ka Ar-Ar age previously assigned, and distinguish the Box Canyon basalts from nearby ca. 395 ka basalt. Exposure ages of boulders within the canyon at the mouth, head and middle of Box Canyon are 21 +/- 1, 19 +/- 3 and 48 +/- 3 ka; scoured bedrock at the canyon head has an exposure age of 45 +/- 5 ka. These data indicate that the canyon was carved before the Bonneville Flood. (c) 2006 Elsevier B.V. All rights reserved.
C1 EO Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
   Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA.
RP Aciego, SM (reprint author), ETH Zentrum, Dept Earth Sci, Inst Isotope Geol & Mineral Resources, Clausiussstr 25,NW C83-1, CH-8092 Zurich, Switzerland.
EM aciego@erdw.ethz.ch
RI Lamb, Michael/B-6478-2012
NR 53
TC 17
Z9 18
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD FEB 28
PY 2007
VL 254
IS 3-4
BP 288
EP 302
DI 10.1016/j.epsl.2006.11.039
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 144MV
UT WOS:000244801400004
ER

PT J
AU Ceolin, D
   Piancastelli, MN
   Guillemin, R
   Stolte, WC
   Yu, SW
   Hemmers, O
   Lindle, DW
AF Ceolin, D.
   Piancastelli, M. N.
   Guillemin, R.
   Stolte, W. C.
   Yu, S. -W.
   Hemmers, O.
   Lindle, D. W.
TI Fragmentation of methyl chloride studied by partial positive and
   negative ion-yield spectroscopy
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID INNER-SHELL EXCITATION; PHOTOFRAGMENTATION; OXYGEN
AB The authors present partial-ion-yield experiments on the methyl chloride molecule excited in the vicinity of the C12p and C1s inner shells. A large number of fragments, cations produced by dissociation or recombination processes, as well as anionic species, have been detected. Although the spectra exhibit different intensity distributions depending on the core-excited atom, general observations include strong site-selective fragmentation along the C-Cl bond axis and a strong intensity dependence of transitions involving Rydberg series on fragment size. (c) 2007 American Institute of Physics.
C1 Univ Uppsala, Dept Phys, SE-75121 Uppsala, Sweden.
   Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA.
   Lab Chim Phys Mat & Rayonnement, UMR 7614, F-75231 Paris, France.
   Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA.
RP Ceolin, D (reprint author), Univ Uppsala, Dept Phys, POB 530, SE-75121 Uppsala, Sweden.
NR 19
TC 19
Z9 19
U1 0
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 28
PY 2007
VL 126
IS 8
AR 084309
DI 10.1063/1.2464093
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 140TZ
UT WOS:000244530900018
PM 17343450
ER

PT J
AU Curtiss, LA
   Redfern, PC
   Raghavachari, K
AF Curtiss, Larry A.
   Redfern, Paul C.
   Raghavachari, Krishnan
TI Gaussian-4 theory
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID CORRELATED MOLECULAR CALCULATIONS; DENSITY-FUNCTIONAL THEORIES;
   ZERO-POINT ENERGIES; COMPLETE BASIS-SET; AB-INITIO THERMOCHEMISTRY;
   3RD-ROW ATOMS K; ATOMIZATION ENERGIES; MODEL CHEMISTRY; COUPLED-CLUSTER;
   G3X THEORY
AB The Gaussian-4 theory (G4 theory) for the calculation of energies of compounds containing first- (Li-F), second- (Na-Cl), and third-row main group (K, Ca, and Ga-Kr) atoms is presented. This theoretical procedure is the fourth in the Gaussian-n series of quantum chemical methods based on a sequence of single point energy calculations. The G4 theory modifies the Gaussian-3 (G3) theory in five ways. First, an extrapolation procedure is used to obtain the Hartree-Fock limit for inclusion in the total energy calculation. Second, the d-polarization sets are increased to 3d on the first-row atoms and to 4d on the second-row atoms, with reoptimization of the exponents for the latter. Third, the QCISD(T) method is replaced by the CCSD(T) method for the highest level of correlation treatment. Fourth, optimized geometries and zero-point energies are obtained with the B3LYP density functional. Fifth, two new higher level corrections are added to account for deficiencies in the energy calculations. The new method is assessed on the 454 experimental energies in the G3/05 test set [L. A. Curtiss, P. C. Redfern, and K. Raghavachari, J. Chem. Phys. 123, 124107 (2005)], and the average absolute deviation from experiment shows significant improvement from 1.13 kcal/mol (G3 theory) to 0.83 kcal/mol (G4 theory). The largest improvement is found for 79 nonhydrogen systems (2.10 kcal/mol for G3 versus 1.13 kcal/mol for G4). The contributions of the new features to this improvement are analyzed and the performance on different types of energies is discussed. (c) 2007 American Institute of Physics.
C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
   Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
   Indiana Univ, Dept Chem, Bloomington, IN 47401 USA.
RP Curtiss, LA (reprint author), Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
NR 47
TC 715
Z9 719
U1 3
U2 127
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 28
PY 2007
VL 126
IS 8
AR 084108
DI 10.1063/1.2436888
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 140TZ
UT WOS:000244530900009
PM 17343441
ER

PT J
AU Pettigrew, MF
   Resat, H
AF Pettigrew, Michel F.
   Resat, Haluk
TI Multinomial tau-leaping method for stochastic kinetic simulations
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID CHEMICALLY REACTING SYSTEMS; GROWTH-FACTOR RECEPTOR; GILLESPIE
   ALGORITHM; SIGNAL-TRANSDUCTION; TIME-EVOLUTION; NETWORKS
AB We introduce the multinomial tau-leaping (M tau L) method for general reaction networks with multichannel reactant dependencies. The M tau L method is an extension of the binomial tau-leaping method where efficiency is improved in several ways. First, tau-leaping steps are determined simply and efficiently using a priori information and Poisson distribution-based estimates of expectation values for reaction numbers over a tentative tau-leaping step. Second, networks are partitioned into closed groups of reactions and corresponding reactants in which no group reactant set is found in any other group. Third, product formation is factored into upper-bound estimation of the number of times a particular reaction occurs. Together, these features allow larger time steps where the numbers of reactions occurring simultaneously in a multichannel manner are estimated accurately using a multinomial distribution. Furthermore, we develop a simple procedure that places a specific upper bound on the total reaction number to ensure non-negativity of species populations over a single multiple-reaction step. Using two disparate test case problems involving cellular processes-epidermal growth factor receptor signaling and a lactose operon model-we show that the tau-leaping based methods such as the M tau L algorithm can significantly reduce the number of simulation steps thus increasing the numerical efficiency over the exact stochastic simulation algorithm by orders of magnitude. (c) 2007 American Institute of Physics.
C1 Pacific NW Natl Lab, Computat Biol & Bioinformat Grp, Richland, WA 99352 USA.
   Pettigrew Consulting, Edgewood, WA 98371 USA.
RP Pettigrew, MF (reprint author), Pacific NW Natl Lab, Computat Biol & Bioinformat Grp, POB 999,MS K7-90, Richland, WA 99352 USA.
EM mpettigr@u.washington.edu; haluk.resat@.pnl-gov
NR 30
TC 29
Z9 30
U1 1
U2 2
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 28
PY 2007
VL 126
IS 8
AR 084101
DI 10.1063/1.2432326
PG 15
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 140TZ
UT WOS:000244530900002
PM 17343434
ER

PT J
AU Rezayat, T
   Shukla, A
AF Rezayat, Talayeh
   Shukla, Anil
TI Dissociative scattering of hyperthermal energy CF3+ ions from modified
   surfaces
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID SLOW POLYATOMIC IONS; CHARGE-EXCHANGE; SOLID-SURFACES; MOLECULAR-IONS;
   PHOTOELECTRON-SPECTROSCOPY; PROTONATED PEPTIDES; REACTIVE COLLISIONS;
   MONOLAYER SURFACE; BEAM SCATTERING; FRAGMENTATION
AB Dissociative scattering of CF3+ ions in collision with a self-assembled monolayer surface of fluorinated alkyl thiol on a gold 111 crystal has been studied at low ion kinetic energies (from 29 to 159 eV) using a custom built tandem mass spectrometer with a rotatable second stage energy analyzer and mass spectrometer detectors. Energy and intensity distributions of the scattered fragment ions were measured as a function of the fragment ion mass and scattering angle. Inelastically scattered CF3+ ions were not observed even at the lowest energy studied here. All fragment ions, CF2+, CF+, F+, and C+, were observed at all energies studied with the relative intensity of the highest energy pathway, C+, increasing and that of the lowest energy pathway, CF2+, decreasing with collision energy. Also, the dissociation efficiency of CF3+ decreased significantly as the collision energy was increased to 159 eV. Energy distributions of all fragment ions from the alkyl thiol surface showed two distinct components, one corresponding to the loss of nearly all of the kinetic energy and scattered over a broad angular range while the other corresponding to smaller kinetic energy losses and scattered closer to the surface parallel. The latter process is due to delayed dissociation of collisionally excited ions after they have passed the collision region as excited parent ions. A similar study performed at 74 eV using a LiF coated surface on a titanium substrate resulted only in one process for all fragment ions; corresponding to the delayed dissociation process. The intensity maxima for these fragmentation processes were shifted farther away from the surface parallel compared to the thiol surface. A new mechanism is proposed for the delayed dissociation process as proceeding via projectile ions' neutralization to long-lived highly excited Rydberg state(s), reionization by the potential field between the collision region and entrance to the energy analyzer, and subsequent dissociation several microseconds after collisional excitation. A kinematic analysis of experimental data plotted as velocity Newton diagrams demonstrates that the delayed dissociation process results from the collisions of the ion with the bulk surface; i.e., the self-assembled monolayer surface acts as a bulk surface. A similar analysis for the highly inelastic collision processes shows that these are due to stronger collisions with a fraction of the thiol molecular chain, varying in length (mass) with the ion energy.(c) 2007 American Institute of Physics.
C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA.
RP Shukla, A (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, POB 999, Richland, WA 99352 USA.
EM anil.shukla@pnl.gov
NR 57
TC 2
Z9 2
U1 0
U2 3
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 28
PY 2007
VL 126
IS 8
AR 084701
DI 10.1063/1.2484290
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 140TZ
UT WOS:000244530900031
PM 17343463
ER

PT J
AU Yang, L
   Garde, S
AF Yang, Lu
   Garde, Shekhar
TI Modeling the selective partitioning of cations into negatively charged
   nanopores in water
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; CANONICAL MONTE-CARLO; FREE-ENERGY
   CALCULATIONS; CARBON NANOTUBES; ION-TRANSPORT; MIXTURE ADSORPTION;
   LIQUID WATER; HYDRATION; MEMBRANES; CHANNEL
AB Partitioning and transport of water and small solutes into and through nanopores are important to a variety of chemical and biological processes and applications. Here we study water structure in negatively charged model cylindrical [carbon nanotube (CNT)-like] nanopores, as well as the partitioning of positive ions of increasing size (Na+, K+, and Cs+) into the pore interior using extensive molecular dynamics simulations. Despite the simplicity of the simulation system-containing a short CNT-like nanopore in water carrying a uniformly distributed charge of q(pore)=-ne surrounded by n (=0,...,8) cations, making the overall system charge neutral-the results provide new and useful insights on both the pore hydration and ion partitioning. For n=0, that is, for a neutral nanopore, water molecules partition into the pore and form single-file hydrogen-bonded wire spanning the pore length. With increasing n, water molecules enter the pore from both ends with preferred orientations, resulting in a mutual repulsion between oriented water molecules at the pore center and creating a cavity-like low density region at the center. For low negative charge densities on the pore, the driving force for partitioning of positive ions into the pore is weak, and no partitioning is observed. Increasing the pore charge gradually leads to partitioning of positive ions into the pore. Interestingly, over a range of intermediate negative charge densities, nanopores display both thermodynamic as well as kinetic selectivity toward partitioning of the larger K+ and Cs+ ions into their interior over the smaller Na+ ions. Specifically, the driving force is in the order K+> Cs+> Na+, and K+ and Cs+ ions enter the pore much more rapidly than Na+ ions. At higher charge densities, the driving force for partitioning increases for all cations-it is highest for K+ ions-and becomes similar for Na+ and Cs+ ions. The variation of thermodynamic driving force and the average partitioning time with the pore charge density together suggest the presence of free energy barriers in the partitioning process. We discuss the role of ion hydration in the bulk and in the pore interior as well as of the pore hydration in determining the barrier heights for ion partitioning and the observed thermodynamic and kinetic selectivities.(c) 2007 American Institute of Physics.
C1 Rensselaer Polytech Inst, Howard P Isermann Dept Chem & Biol Engn, Troy, NY 12180 USA.
   Rensselaer Polytech Inst, Ctr Biotechnol & Interdisciplinary Studies, Troy, NY 12180 USA.
   Los Alamos Natl Lab, T 12 Grp, Los Alamos, NM 87545 USA.
RP Yang, L (reprint author), Rensselaer Polytech Inst, Howard P Isermann Dept Chem & Biol Engn, Troy, NY 12180 USA.
EM yangl@lanl.gov; gardes@rpi.edu
RI Garde, Shekhar/C-3060-2008; Yang, Lu/A-5446-2010
NR 56
TC 33
Z9 33
U1 4
U2 27
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 28
PY 2007
VL 126
IS 8
AR 084706
DI 10.1063/1.2464083
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 140TZ
UT WOS:000244530900036
PM 17343468
ER

PT J
AU Kim, J
   You, HD
   Ducharme, S
   Adenwalla, S
AF Kim, Jihee
   You, Hoydoo
   Ducharme, Stephen
   Adenwalla, S.
TI The effect of interlayer interactions on the ferroelectric-paraelectric
   phase transition in multilayered thin films of vinylidene
   fluoride-trifluoroethylene copolymers
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID LANGMUIR-BLODGETT-FILMS; EPITAXIAL BATIO3/SRTIO3 SUPERLATTICES;
   SINGLE-CRYSTALLINE FILMS; LEAD-ZIRCONATE-TITANATE; BARIUM-TITANATE;
   ANTIFERROMAGNETIC ORDER; P(VDF-TRFE) COPOLYMERS; COO/NIO SUPERLATTICES;
   PEROVSKITE FILMS; COERCIVE FIELD
AB The interaction between ferroelectric polymer films with different transition temperatures is evident in the effect of layer thickness on the ferroelectric paraelectric phase transition in multilayer films, as revealed by x-ray diffraction and dielectric measurements. The multilayer samples consisted of alternating Langmuir-Blodgett (LB)films of two different copolymers of vinylidene fluoride with trifluoroethylene, one with 80% vinylidene fluoride and a ferroelectric-paraelectric transition temperature on heating of 133 +/- 4 degrees C and the other with 50% vinylidene fluoride and a transition temperature of 70 +/- 4 degrees C. Samples with a repeat period of 20 LB layers (10 contiguous layers of each composition) exhibited two distinct phase transitions, indicative of minimal interaction between the two materials. Films with a repeat period of 2, or films made from an equal mixture of the two copolymers, exhibited composite behaviour, with an intermediate transition temperature and suppression of the transitions associated with the individual compositions. Films with a repeat period of 10 exhibit cross-over behaviour. These results imply that the ferroelectric interaction length along the (110) direction, which is perpendicular to the film plane, is approximately 11 nm.
C1 Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
   Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA.
   Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA.
RP Kim, J (reprint author), Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA.
EM sducharme1@unl.edu
RI You, Hoydoo/A-6201-2011; Ducharme, Stephen/A-1909-2009
OI You, Hoydoo/0000-0003-2996-9483; Ducharme, Stephen/0000-0003-0936-7995
NR 67
TC 7
Z9 7
U1 0
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD FEB 28
PY 2007
VL 19
IS 8
AR 086206
DI 10.1088/0953-8984/19/8/086206
PG 21
WC Physics, Condensed Matter
SC Physics
GA 135PS
UT WOS:000244166100010
ER

PT J
AU Sanati, M
   Zunger, A
AF Sanati, Mahdi
   Zunger, Alex
TI Evolution of L1(2) ordered domains in fcc Cu3Au alloy
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID SHORT-RANGE-ORDER; X-RAY-SCATTERING; ANTIPHASE BOUNDARIES; MONTE-CARLO;
   CU-AU; DISORDER TRANSITION; BINARY-ALLOYS; METAL-ALLOYS; FREE ENERGY;
   NI-AU
AB When a disordered Cu0.75Au0.25 alloy is cooled down below T-c (= 663 K), it orders into the L1(2) phase ( Cu3Au), exhibiting initially a microstructure of domain walls. Whereas at long time (t) the average size of the domains develops as a power law alpha t(1/ 2), at short times a distinct incubation period is observed experimentally. We show that a first-principles description of a configurational Hamiltonian via the 'mixed-space cluster expansion' that includes both 'chemical' and 'strain' effects produces such an incubation period in Monte Carlo simulations, whereas the classical short-ranged ('chemical' only) Ising description does not. We find that the origin of this delay time is the elastic energy, ensuing from the Cu-Au atomic size mismatch.
C1 Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA.
   Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Sanati, M (reprint author), Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA.
RI Zunger, Alex/A-6733-2013
NR 35
TC 3
Z9 3
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD FEB 28
PY 2007
VL 19
IS 8
AR 086201
DI 10.1088/0953-8984/19/8/086201
PG 9
WC Physics, Condensed Matter
SC Physics
GA 135PS
UT WOS:000244166100005
ER

PT J
AU Yoon, M
   Borrmann, P
   Tomanek, D
AF Yoon, Mina
   Borrmann, Peter
   Tomanek, David
TI Targeted medication delivery using magnetic nanostructures
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
ID DIPOLAR HARD-SPHERES; ELECTRORHEOLOGICAL FLUIDS; FERROFLUIDS; ORDER;
   CLUSTERS; DYNAMICS
AB We use quaternion molecular dynamics simulations to describe field-induced structural transitions in systems of few magnetic dipoles and their use for targeted medication delivery. Compact ring isomers of magnetic particles are contained, together with molecules of an active medication, inside inert microcapsules. The filled microcapsules may be transported within the body using a weak, inhomogeneous magnetic field. Medication release is triggered by puncturing the container during a structural transition within the magnetic subsystem, induced by an externally applied strong magnetic field. Our simulations describe not only the time evolution of the magnetic subsystem during a successful medication release, but also address ways to suppress an accidental release induced by thermal and magnetic fluctuations.
C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA.
   Univ Oldenburg, Dept Phys, D-26111 Oldenburg, Germany.
   Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
   Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany.
RP Yoon, M (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA.
RI Tomanek, David/B-3275-2009; Yoon, Mina/A-1965-2016
OI Tomanek, David/0000-0003-1131-4788; Yoon, Mina/0000-0002-1317-3301
NR 25
TC 3
Z9 3
U1 2
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD FEB 28
PY 2007
VL 19
IS 8
AR 086210
DI 10.1088/0953-8984/19/8/086210
PG 9
WC Physics, Condensed Matter
SC Physics
GA 135PS
UT WOS:000244166100014
ER

PT J
AU Zhang, WX
   Konstantinidis, N
   Al-Hassanieh, KA
   Dobrovitski, VV
AF Zhang, Wenxian
   Konstantinidis, N.
   Al-Hassanieh, K. A.
   Dobrovitski, V. V.
TI Modelling decoherence in quantum spin systems
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Review
ID DEPENDENT SCHRODINGER-EQUATION; ELECTRICAL-TRANSPORT PHENOMENA;
   MULTIPULSE NMR EXPERIMENTS; DISSIPATIVE SYSTEM; MAGNETIC PARTICLES;
   SPECTRAL METHODS; DIPOLAR SOLIDS; NUCLEAR SPINS; DYNAMICS; TIME
AB In this review we discuss approaches to numerical modelling of decoherence by a spin bath. We consider several popular simulation methods, briefly discussing their implementation, and analyse their advantages and drawbacks. Furthermore, we consider application of these methods to several different physical systems, demonstrating how the numerical simulations can help in understanding the details of the decoherence process in quantum spin systems. The discussion of possible interesting directions for further research concludes the review.
C1 Iowa State Univ, Ames Lab, Ames, IA 50014 USA.
   Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37996 USA.
   Univ Tennessee, Dept Phys, Knoxville, TN 37831 USA.
RP Zhang, WX (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50014 USA.
EM slava@ameslab.gov
RI Zhang, Wenxian/A-4274-2010
NR 147
TC 57
Z9 57
U1 0
U2 15
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
EI 1361-648X
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD FEB 28
PY 2007
VL 19
IS 8
AR 083202
DI 10.1088/0953-8984/19/8/083202
PG 28
WC Physics, Condensed Matter
SC Physics
GA 135PS
UT WOS:000244166100004
ER

PT J
AU Silvernail, NJ
   Barabanschikov, A
   Pavlik, JW
   Noll, BC
   Zhao, JY
   Alp, EE
   Sturhahn, W
   Sage, JT
   Scheidt, WR
AF Silvernail, Nathan J.
   Barabanschikov, Alexander
   Pavlik, Jeffrey W.
   Noll, Bruce C.
   Zhao, Jiyong
   Alp, E. Ercan
   Sturhahn, Wolfgang
   Sage, J. Timothy
   Scheidt, W. Robert
TI Interplay of structure and vibrational dynamics in six-coordinate heme
   nitrosyls
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID MOLECULAR STEREOCHEMISTRY; NITROSYLMETALLOPORPHYRINS
AB The isolation of two polymorphic forms of nitrosyl(1-methylimidazole)(tetra-p-fluorophenylporphinato)iron(II) provides a unique opportunity to explore the interplay of structure and vibrational dynamics in six-coordinate {FeNO}(7) nitrosyliron porphyrinates. The two species display differing vibrational spectroscopic properties both in nu(NO) (IR) and the iron vibrational modes obtained through the use of nuclear resonance vibrational spectroscopy. Structural characterization of the two complexes has yielded extremely high-quality structures that further confirm that coordination of NO leads to ligand tilting and asymmetry in the equatorial Fe-N-p bond distances. The two polymorphic structures (monoclinic and triclinic crystal systems) differ in the relative orientations of the two axial ligands and small but significant differences in coordination group bond distances. Although DFT calculations suggest that the NO/imidazole orientations should be indistinguishable, real experimental (structural and vibrational) differences between the two are found. The observed variation in the axial and equatorial Fe-N bonds is strongly correlated to the dynamics of the Fe-NO unit and other motions of iron. Other structural differences appear to have little effect on the vibrational properties of the two forms. The in-plane motions of iron in CO versus NO heme complexes illustrate distinct dynamic differences.
C1 Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA.
   Northeastern Univ, Dept Phys, Boston, MA 02115 USA.
   Northeastern Univ, Ctr Interdisciplinary Res Complex Syst, Boston, MA 02115 USA.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Scheidt, WR (reprint author), Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA.
EM scheidt.1@nd.edu
RI Barabanschikov, Alexander/L-3048-2013; 
OI Noll, Bruce/0000-0003-3962-4358
FU NIGMS NIH HHS [GM-38401, R01 GM038401-33, R01 GM038401, R01 GM038401-34]
NR 13
TC 25
Z9 25
U1 0
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD FEB 28
PY 2007
VL 129
IS 8
BP 2200
EP +
DI 10.1021/ja066869k
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 137ZC
UT WOS:000244330800001
PM 17269768
ER

PT J
AU Rustad, JR
   Bylaska, EJ
AF Rustad, James R.
   Bylaska, Eric J.
TI Ab initio calculation of isotopic fractionation in B(OH)(3)(aq) and
   BOH4-(aq)
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID PARTITION-FUNCTION RATIOS; MOLECULAR-ORBITAL THEORY; PAST OCEAN PH;
   BORON ISOTOPES; BORIC ACIDS; EQUILIBRIUM
AB Ab initio molecular dynamics calculations are used here to calculate vibration frequencies for B(OH)(3)(aq) and B(OH)(4)(-)(aq). We show that previous calculations have either underestimated or omitted altogether a major fractionating vibrational mode. The new results indicate that the B-11 partitions into B(OH)(4)(-) in water, in contrast to recent experimental measurement of the fractionation factor. The discrepancy appears to result from using finite-temperature vibrational frequencies in the standard harmonic expression for the fractionation factor. While our results connect the measured spectrum to previous harmonic electronic structure calculations, they indicate that harmonic frequencies must be extracted from experimental vibrational spectra before they can be used in the standard expressions.
C1 Univ Calif Davis, Dept Geol, Davis, CA 95616 USA.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Rustad, JR (reprint author), Univ Calif Davis, Dept Geol, 1 Shields Ave, Davis, CA 95616 USA.
EM jrrustad@ucdavis.edu
NR 26
TC 32
Z9 33
U1 1
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD FEB 28
PY 2007
VL 129
IS 8
BP 2222
EP +
DI 10.1021/ja0683335
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 137ZC
UT WOS:000244330800012
PM 17266314
ER

PT J
AU Sarangi, R
   George, SD
   Rudd, DJ
   Szilagyi, RK
   Ribas, X
   Rovira, C
   Almeida, M
   Hodgson, KO
   Hedman, B
   Solomon, EI
AF Sarangi, Ritimukta
   George, Serena DeBeer
   Rudd, Deanne Jackson
   Szilagyi, Robert K.
   Ribas, Xavi
   Rovira, Concepcio
   Almeida, Manuel
   Hodgson, Keith O.
   Hedman, Britt
   Solomon, Edward I.
TI Sulfur K-edge X-ray absorption spectroscopy as a probe of ligand-metal
   bond covalency: Metal vs ligand oxidation in copper and nickel
   dithiolene complexes
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID ELECTRON-PARAMAGNETIC RESONANCE; MODEL COMPLEXES; WAVE-FUNCTIONS;
   FINE-STRUCTURE; BASIS-SET; CU-III; MALEONITRILEDITHIOLATE;
   APPROXIMATION; PLASTOCYANIN; EXCHANGE
AB A combination of Cu L-edge and S K-edge X-ray absorption data and density functional theory (DFT) calculations has been correlated with S-33 electron paramagnetic resonance superhyperfine results to obtain the dipole integral (I-s) for the S 1s -> 3p transition for the dithiolene ligand maleonitriledithiolate (MNT) in (TBA)(2)[Cu(MNT)(2)] (TBA) tetra-n-butylammonium). The results have been combined with the I-s of sulfide derived from XPS studies to experimentally obtain a relation between the S 1s -> 4p transition energy (which reflects the charge on the S atom, Q mol S) and the dipole integral over a large range of Q mol S. The results show that, for high charges on S, I-s can vary from the previously reported I-s values, calculated using data over a limited range of Q mol S. A combination of S K-edge and Cu K-and L-edge X-ray absorption data and DFT calculations has been used to investigate the one-electron oxidation of [Cu(MNT)2](2)-and [Ni(MNT)(2)](2-). The conversion of [Cu(MNT)(2)](2)-to [Cu(MNT)(2)]-results in a large change in the charge on the Cu atom in the molecule (Q mol Cu) and is consistent with a metal-based oxidation. This is accompanied by extensive charge donation from the ligands to compensate the high charge on the Cu in [Cu(MNT) 2]based on the increased S K-edge and decreased Cu L-edge intensity, respectively. In contrast, the oxidation of [Ni(MNT) 2] 2-to [Ni(MNT) 2]-results in a small change in Q mol Ni, indicating a ligand-based oxidation consistent with oxidation of a molecular orbital, psi*(SOMO) (singly occupied molecular orbital), with predominant ligand character.
C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA.
   Stanford Univ, Dept Chem, Stanford, CA 94305 USA.
   Univ Autonoma Barcelona, Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain.
   UL, CFMC, Dept Quim, Inst Tecnol & Nucl, P-2686953 Sacavem, Portugal.
RP George, SD (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA.
EM edward.solomon@stanford.edu
RI DeBeer, Serena/G-6718-2012; Szilagyi, Robert/G-9268-2012; ROVIRA,
   Concepcio*/F-3155-2011; Ribas, Xavi/F-3945-2014; Almeida,
   Manuel/B-5227-2011
OI Szilagyi, Robert/0000-0002-9314-6222; ROVIRA,
   Concepcio*/0000-0002-2365-9479; Ribas, Xavi/0000-0002-2850-4409;
   Almeida, Manuel/0000-0003-2222-5641
FU NCRR NIH HHS [P41 RR001209, P41 RR001209-29, RR-01209]
NR 71
TC 95
Z9 96
U1 6
U2 80
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD FEB 28
PY 2007
VL 129
IS 8
BP 2316
EP 2326
DI 10.1021/ja0665949
PG 11
WC Chemistry, Multidisciplinary
SC Chemistry
GA 137ZC
UT WOS:000244330800033
PM 17269767
ER

PT J
AU Gallis, MA
   Torczynski, JR
   Rader, DJ
AF Gallis, M. A.
   Torczynski, J. R.
   Rader, D. J.
TI A computational investigation of noncontinuum gas-phase heat transfer
   between a heated microbeam and the adjacent ambient substrate
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article; Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 05-11, 2005
CL Orlando, FL
SP ASME, Proc Ind Div, ASME, Rail Transportat Div, ASME, Noise Control & Acoust Div, ASME, Triol Div, ASME, Pressure Vessels & Piping Div, ASME, Bioengn Div, ASME, Mat Div, ASME, Appl Mech Div, ASME, Fluids Engn Div, ASME, Micro Elect Mech Syst Div, ASME, Heat Transfer Div, ASME, Nucl Engn Div, ASME, Power Div, ASME, Solar Energy Div, ASME, Safety Engn & Risk Anal Div, ASME, Technol & Soc Div, ASME, Adv Energy Syst Div, ASME, Aerosp Div, ASME, Comp & Informat Engn Div
DE heat transfer; gas-phase; microscale; noncontinuum
ID TEMPERATURE-JUMP PROBLEM; BOLTZMANN-EQUATION; THERMAL ACTUATORS; SURFACE
AB Noncontinuum gas-phase heat transfer in two microscale geometries is investigated computationally. The motivation is microscale thermal actuation produced by heating-induced expansion of a near-substrate microbeam in air. The first geometry involves a 1-mu m microgap, filled with argon or nitrogen and bounded by parallel solid slabs. The second geometry involves a heated I-shaped microbeam 2 mu m from the adjacent ambient substrate, with nitrogen in between. Two computational methods are applied to the above. The Navier-Stokes slip-jump (NSSJ) method uses continuum heat transfer in the bulk gas and temperature jumps at the boundaries to treat noncontinuum effects. The Direct Simulation Monte Carlo (DSMC) method uses computational molecules to simulate noncontinuum gas behavior more rigorously. For the microgap, the heat-flux values from both methods are in good agreement for all pressures and accommodation coefficients except for intermediate pressures and near-unity accommodation coefficients, where differences up to 8% are observed. For the microbeam, both methods are in good agreement except for low pressures and near-unity accommodation coefficients, where differences up to a factor of 2 are observed in the heat-flux values. The causes of these discrepancies are explained in terms of noncontinuum gas behavior in the vicinity of solid surfaces, and modifications to the NSSJ temperature-jump boundary condition that improve agreement are presented. DSMC simulations of the microbeam are presented that show the steady gas motion produced by noncontinuum stresses in gases with nonparallel isotherms. (c) 2006 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA.
RP Torczynski, JR (reprint author), Sandia Natl Labs, Engn Sci Ctr, POB 5800, Albuquerque, NM 87185 USA.
EM jrtorcz@sandia.gov
NR 28
TC 15
Z9 15
U1 1
U2 6
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD FEB 28
PY 2007
VL 134
IS 1
SI SI
BP 57
EP 68
DI 10.1016/j.sna.2006.05.003
PG 12
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 148HT
UT WOS:000245066000008
ER

PT J
AU Field, RV
   Epp, DS
AF Field, R. V., Jr.
   Epp, D. S.
TI Development and calibration of a stochastic dynamics model for the
   design of a MEMS inertial switch
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article; Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 05-11, 2005
CL Orlando, FL
SP ASME, Proc Ind Div, ASME, Rail Transportat Div, ASME, Noise Control & Acoust Div, ASME, Triol Div, ASME, Pressure Vessels & Piping Div, ASME, Bioengn Div, ASME, Mat Div, ASME, Appl Mech Div, ASME, Fluids Engn Div, ASME, Micro Elect Mech Syst Div, ASME, Heat Transfer Div, ASME, Nucl Engn Div, ASME, Power Div, ASME, Solar Energy Div, ASME, Safety Engn & Risk Anal Div, ASME, Technol & Soc Div, ASME, Adv Energy Syst Div, ASME, Aerosp Div, ASME, Comp & Informat Engn Div
DE probability; random vibration; nonlinear dynamics; vibro-impact system
AB The development and calibration to experimental data of a nonlinear stochastic dynamics model for a Micro-Electro-Mechanical System (MEMS) inertial switch is discussed. The MEMS switch is modeled as a classical vibro-impact dynamic system: a single degree-of-freedom oscillator subject to impact with a single rigid barrier. An applied load, modeled as a stationary Gaussian stochastic process with prescribed power spectral density (PSD), excites the device and causes repetitive impacts with the barrier. A subset of the model parameters are described as correlated random variables to represent the significant unit-to-unit variability observed during testing of a collection of the switches. Experimental measurements from linear modal and nonlinear transient tests on multiple nominally-identical units are used to calibrate the probabilistic model. The calibrated model for the MEMS inertial switch is then used for probabilistic design studies, where the metric of performance is the amount of time the switch remains closed when subject to the applied stochastic load. (c) 2006 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Struct Dynam Res Dept, Albuquerque, NM 87185 USA.
   Sandia Natl Labs, Struct Dynam Engn Dept, Albuquerque, NM 87185 USA.
RP Field, RV (reprint author), Sandia Natl Labs, Struct Dynam Res Dept, POB 5800, Albuquerque, NM 87185 USA.
EM rvfield@sandia.gov; dsepp@sandia.gov
OI Field, Richard/0000-0002-2765-7032
NR 11
TC 14
Z9 15
U1 0
U2 4
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD FEB 28
PY 2007
VL 134
IS 1
SI SI
BP 109
EP 118
DI 10.1016/j.sna.2006.04.033
PG 10
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 148HT
UT WOS:000245066000013
ER

PT J
AU Whalen, SA
   Richards, CD
   Bahr, DF
   Richards, RF
AF Whalen, S. A.
   Richards, C. D.
   Bahr, D. F.
   Richards, R. F.
TI Characterization and modeling of a microcapillary driven liquid-vapor
   phase-change membrane actuator
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article; Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 05-11, 2005
CL Orlando, FL
SP ASME, Proc Ind Div, ASME, Rail Transportat Div, ASME, Noise Control & Acoust Div, ASME, Triol Div, ASME, Pressure Vessels & Piping Div, ASME, Bioengn Div, ASME, Mat Div, ASME, Appl Mech Div, ASME, Fluids Engn Div, ASME, Micro Elect Mech Syst Div, ASME, Heat Transfer Div, ASME, Nucl Engn Div, ASME, Power Div, ASME, Solar Energy Div, ASME, Safety Engn & Risk Anal Div, ASME, Technol & Soc Div, ASME, Adv Energy Syst Div, ASME, Aerosp Div, ASME, Comp & Informat Engn Div
DE MEMS actuator; phase-change; microcapillary; efficiency
ID FABRICATION; MICROPUMP; SYSTEMS; VALVES
AB Factors affecting the efficiency of liquid-vapor phase-change actuators during dynamic operation are explored. To do this, a model actuator was specifically designed so that actuator geometry, material properties and operation could be easily varied in order to parametrically study their effects on actuator efficiency. A numerical model was developed so that the detailed energy budget within the device could be elucidated. It was found that device efficiency was maximized when the energy input to actuator was equal to the energy required to dry out the evaporator. Membrane thermal mass and compliance, as well as the thickness of the evaporating liquid layer were also found to have a large impact on efficiency. In contrast, membrane thermal conductivity was found to have a minimal effect on efficiency for dynamic operation. Based on the parameter study, a liquid-vapor phase-change membrane actuator fabricated with a 10.3 mu m thick wicking structure and a 200 nm thick, 3 edge length silicon nitride actuation membrane was shown to demonstrate improved performance characteristics. The actuator generated peak pressures and deflections of 123 kPa and 167 mu m when actuated with a 14.3 mJ heating pulse for a thermal efficiency of 0.15%. (c) 2006 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Livermore, CA 94550 USA.
   Washington State Univ, Sch Mech & Mat Engn, Microfabricat Lab, Pullman, WA 99164 USA.
RP Whalen, SA (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA.
EM sawhale@sandia.gov
RI Richards, Robert/B-3483-2012; Bahr, David/A-6521-2012
OI Bahr, David/0000-0003-2893-967X
NR 28
TC 17
Z9 17
U1 0
U2 1
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD FEB 28
PY 2007
VL 134
IS 1
SI SI
BP 201
EP 212
DI 10.1016/j.sna.2006.04.038
PG 12
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 148HT
UT WOS:000245066000024
ER

PT J
AU Sumali, H
   Massad, JE
   Czaplewski, DA
   Dyck, CW
AF Sumali, Hartono
   Massad, Jordan E.
   Czaplewski, David A.
   Dyck, Christopher W.
TI Waveform design for pulse-and-hold electrostatic actuation in MEMS
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article; Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 05-11, 2005
CL Orlando, FL
SP ASME, Proc Ind Div, ASME, Rail Transportat Div, ASME, Noise Control & Acoust Div, ASME, Triol Div, ASME, Pressure Vessels & Piping Div, ASME, Bioengn Div, ASME, Mat Div, ASME, Appl Mech Div, ASME, Fluids Engn Div, ASME, Micro Elect Mech Syst Div, ASME, Heat Transfer Div, ASME, Nucl Engn Div, ASME, Power Div, ASME, Solar Energy Div, ASME, Safety Engn & Risk Anal Div, ASME, Technol & Soc Div, ASME, Adv Energy Syst Div, ASME, Aerosp Div, ASME, Comp & Informat Engn Div
DE RF MEMS; electrostatic actuation; switch bounce; input shaping
ID RF MEMS; DEVICES
AB Microelectromechanical systems (MEMS) ohmic switches for radio-frequency (RF) signals have certain advantages over solid-state switches, such as lower insertion loss, better linearity, and lower static power dissipation. The RF MEMS switch discussed in this paper consists of a plate, suspended over an actuation pad by four double-cantilever springs. Closing the switch with a step actuation voltage typically causes the plate to rebound from the electrical contacts. This interrupts the signal continuity and degrades the performance, reliability and durability of the switch. This paper presents a procedure to design shaped waveforms to close the switch with low impact speed. The soft landing waveform is designed with a synergy of a three-dimensional finite element model (3-D FEM), a reduced-order model, and experimental refinement with a laser Doppler velocimeter. This integrated approach enables the switch to close with low impact speeds that do not result in significant mechanical rebound. (c) 2006 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Sumali, H (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM hsumali@sandia.gov
NR 14
TC 27
Z9 27
U1 0
U2 3
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD FEB 28
PY 2007
VL 134
IS 1
SI SI
BP 213
EP 220
DI 10.1016/j.sna.2006.04.041
PG 8
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 148HT
UT WOS:000245066000025
ER

PT J
AU Tamulis, A
   Tsifrinovich, VI
   Tretiak, S
   Berman, GP
   Allara, DL
AF Tamulis, A.
   Tsifrinovich, V. I.
   Tretiak, S.
   Berman, G. P.
   Allara, D. L.
TI Neutral radical molecules ordered in self-assembled monolayer systems
   for quantum information processing
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID DENSITY
AB Implementation of quantum information processing based on spatially localized electronic spins in stable molecular radicals is discussed. The necessary operating conditions for such molecules are formulated in self-assembled monolayer (SAM) systems. As a model system we start with 1,3-diketone types of neutral radicals. Using first principles quantum chemical calculations we prove that these molecules have stable localized electron spin, which may re present a qubit in quantum information processing. (c) 2007 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA.
   Los Alamos Natl Lab, CNLS, Los Alamos, NM 87544 USA.
   Vilnius Univ, Inst Theoret Phys & Astron, Vilnius, Lithuania.
   Polytech Univ, Dept Phys, Brooklyn, NY 11201 USA.
   Penn State Univ, Dept Chem, University Pk, PA 16802 USA.
   Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA.
RP Tretiak, S (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA.
EM serg@lanl.gov
RI Tretiak, Sergei/B-5556-2009
OI Tretiak, Sergei/0000-0001-5547-3647
NR 28
TC 16
Z9 16
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD FEB 27
PY 2007
VL 436
IS 1-3
BP 144
EP 149
DI 10.1016/j.cplett.2007.01.007
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 146PK
UT WOS:000244946400027
ER

PT J
AU Namilae, S
   Fuentes-Cabrera, M
   Radhakrishnan, B
   Sarma, GB
   Nicholson, DM
AF Namilae, S.
   Fuentes-Cabrera, M.
   Radhakrishnan, B.
   Sarma, G. B.
   Nicholson, D. M.
TI Energetics of hydrogen storage in organolithium nanostructures
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID WALLED CARBON NANOTUBES; TRANSITION
AB Ab initio calculations based on the second-order Moller-Plesset perturbation theory (MP2) were used to investigate the interaction of molecular hydrogen with alkyl lithium organometallic compounds. It is found that lithium in organolithium structures attracts hydrogen molecule with a binding energy of about 0.1 eV. The calculations also show that organolithium compounds bind strongly with graphitic nanostructures. Therefore, these carbon based nanostructures functionalized with organolithium compounds can be effectively used for storage of molecular hydrogen. Energetics and mechanisms for achieving high weight percent hydrogen storage in organolithium based nanostructures are discussed. (c) 2007 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Computat Mat Sci Grp, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Namilae, S (reprint author), Oak Ridge Natl Lab, Computat Mat Sci Grp, Div Math & Comp Sci, Oak Ridge, TN 37831 USA.
EM namilaes@ornl.gov; radhakrishnb@ornl.gov
RI Fuentes-Cabrera, Miguel/Q-2437-2015
OI Fuentes-Cabrera, Miguel/0000-0001-7912-7079
NR 16
TC 6
Z9 6
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD FEB 27
PY 2007
VL 436
IS 1-3
BP 150
EP 154
DI 10.1016/j.cplett.2007.01.004
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 146PK
UT WOS:000244946400028
ER

PT J
AU Yongsunthon, R
   Fowler, VG
   Lower, BH
   Vellano, FP
   Alexander, E
   Reller, LB
   Corey, GR
   Lower, SK
AF Yongsunthon, Ruchirej
   Fowler, Vance G., Jr.
   Lower, Brian H.
   Vellano, F. Paul, III
   Alexander, Emily
   Reller, L. Barth
   Corey, G. Ralph
   Lower, Steven K.
TI Correlation between fundamental binding forces and clinical prognosis of
   Staphylococcus aureus infections of medical implants
SO LANGMUIR
LA English
DT Article
ID FIBRONECTIN-BINDING; PROTEIN; BACTEREMIA; BACTERIUM; SURFACE;
   COLONIZATION; ENDOCARDITIS; EXPRESSION; ADHERENCE; MUPIROCIN
AB Atomic force microscopy was used to "fish" for binding reactions between a fibronectin-coated probe (i.e., substrate simulating an implant device) and each of 15 different isolates of Staphylococcus aureus obtained from either patients with an infected cardiac prosthesis (invasive group) or healthy human subjects (control group). There is a strong distinction (p = 0.01) in the binding-force signature observed for the invasive versus control populations. This observation suggests that a microorganism's "force taxonomy" may provide a fundamental and practical indicator of the pathogen-related risk that infections pose to patients with implanted medical devices.
C1 Ohio State Univ, Mendenhall Lab 275, Columbus, OH 43210 USA.
   Duke Univ, Med Ctr, Durham, NC 27710 USA.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Lower, SK (reprint author), Ohio State Univ, Mendenhall Lab 275, 125 S Oval Mall, Columbus, OH 43210 USA.
EM Lower.9@osu.edu
RI Lower, Steven/A-2440-2008
OI Lower, Steven/0000-0001-9796-0830
NR 31
TC 27
Z9 28
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD FEB 27
PY 2007
VL 23
IS 5
BP 2289
EP 2292
DI 10.1021/la063117v
PG 4
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
   Multidisciplinary
SC Chemistry; Materials Science
GA 136UD
UT WOS:000244248700006
PM 17274638
ER

PT J
AU Backer, SA
   Suez, I
   Fresco, ZM
   Rolandi, M
   Frechet, JMJ
AF Backer, Scott A.
   Suez, Itai
   Fresco, Zachary M.
   Rolandi, Marco
   Frechet, Jean M. J.
TI Covalent formation of nanoscale fullerene and dendrimer patterns
SO LANGMUIR
LA English
DT Article
ID TEMPLATE PATTERNS; NANOLITHOGRAPHY; MONOLAYER; SURFACE; NANOSTRUCTURES;
   LITHOGRAPHY; GRAPHITE; C-60
AB Localized patterns of amine-terminated monolayers obtained via the surface modification of a monolayer with the biased probe of an atomic force microscope were used to covalently attach buckminsterfullerene or dendrimers to the surface, affording lines as narrow as 20 nm.
C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA.
RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
EM frechet@berkeley.edu
OI Frechet, Jean /0000-0001-6419-0163
NR 27
TC 16
Z9 16
U1 0
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD FEB 27
PY 2007
VL 23
IS 5
BP 2297
EP 2299
DI 10.1021/la0631973
PG 3
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
   Multidisciplinary
SC Chemistry; Materials Science
GA 136UD
UT WOS:000244248700008
PM 17269811
ER

PT J
AU Romanov, V
   Walker, GC
AF Romanov, Vyacheslav
   Walker, Gilbert C.
TI Infrared near-field detection of a narrow resonance due to molecular
   vibrations in a nanoparticle
SO LANGMUIR
LA English
DT Article
ID SCANNING OPTICAL MICROSCOPY; SURFACE-INDUCED RESISTIVITY; FREE-ELECTRON
   LASER; APERTURELESS MICROSCOPY; RAMAN-SPECTROSCOPY; DIELECTRIC CONTRAST;
   SPATIAL-RESOLUTION; GOLD-FILMS; SCATTERING; ENHANCEMENT
AB Di-iron nonacarbonyl particles on a gold surface have been imaged using an apertureless near-field scanning infrared microscopy. First and second harmonic detection, with and without an auto-homodyning option, have been used to collect the near-field spectrum of a single vibrational mode of the bridging carbonyls in di-iron nonacarbonyl nanocrystalline flakes on a gold surface. The experimental results have been compared to two theoretical models, a static image-dipole effective medium and an image dipole modified by a Fresnel coefficient for the appropriate observation angle. The calculations have taken into account the roughness of the gold film. The phase dependence of the near-field contrast has been investigated using broadband and tunable CO2 lasers. Particle size effects on contrast and spatial resolution have been studied to determine the limits of applicability of the half-space approximation.
C1 Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA.
   Natl Energy & Technol Lab, Dept Energy, Pittsburgh, PA 15236 USA.
   Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada.
   Univ Toronto, Inst Opt Sci, Toronto, ON M5S 3H6, Canada.
RP Romanov, V (reprint author), Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA.
EM romanov@netl.doe.gov
RI Romanov, Vyacheslav/C-6467-2008; 
OI Romanov, Vyacheslav/0000-0002-8850-3539; Walker,
   Gilbert/0000-0002-5248-5498
FU NIBIB NIH HHS [R21 EB 003101]
NR 60
TC 7
Z9 7
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD FEB 27
PY 2007
VL 23
IS 5
BP 2829
EP 2837
DI 10.1021/la0625594
PG 9
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
   Multidisciplinary
SC Chemistry; Materials Science
GA 136UD
UT WOS:000244248700082
PM 17309222
ER

PT J
AU Ohi, MD
   Ren, LP
   Wall, JS
   Gould, KL
   Walz, T
AF Ohi, Melanie D.
   Ren, Liping
   Wall, Joseph S.
   Gould, Kathleen L.
   Walz, Thomas
TI Structural characterization of the fission yeast U5.U2/U6 spliceosome
   complex
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE Cdc5; cryo-EM; pre-mRNA splicing; Schizosaccharomyces pombe
ID ARCHAEAL SM PROTEIN; CRYSTAL-STRUCTURE; 3-DIMENSIONAL STRUCTURE;
   ELECTRON-MICROSCOPY; RNA-BINDING; IN-VIVO; SNRNP; CORE; RECONSTRUCTION;
   PURIFICATION
AB The spliceosome is a dynamic macromolecular machine that catalyzes the excision of introns from pre-mRNA. The megadalton-sized spliceosome is composed of four small nuclear RNPs and additional pre-mRNA splicing factors. The formation of an active spliceosome involves a series of regulated steps that requires the assembly and disassembly of large multiprotein/RNA complexes. The dynamic nature of the pre-mRNA splicing reaction has hampered progress in analyzing the structure of spliceosomal complexes. We have used cryo-electron microscopy to produce a 29-angstrom density map of a stable 37S spliceosomal complex from the genetically tractable fission yeast, Schizosaccharomyces pombe. Containing the U2, U5, and U6 snRNAs, pre-mRNA splicing intermediates, U2 and U5 snRNP proteins, the Nineteen Complex (NTC), and second-step splicing factors, this complex closely resembles in vitro purified mammalian C complex. The density map reveals an asymmetric particle, approximate to 30 X 20 X 18 nm in size, which is composed of distinct domains that contact each other at the center of the complex.
C1 Harvard Univ, Sch Med, Dept Cell Biol, Boston, MA 02115 USA.
   Vanderbilt Univ, Sch Med, Dept Cell & Dev Biol, Nashville, TN 37232 USA.
   Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Gould, KL (reprint author), Harvard Univ, Sch Med, Dept Cell Biol, Boston, MA 02115 USA.
EM kathy.gould@vanderbilt.edu; twalz@hms.havard.edu
FU NCRR NIH HHS [P41 RR-01081, P41 RR001081]; NIBIB NIH HHS [5 P41 EB2181,
   P41 EB002181]; NIGMS NIH HHS [R01 GM068900, GM68900]
NR 47
TC 30
Z9 30
U1 0
U2 2
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD FEB 27
PY 2007
VL 104
IS 9
BP 3195
EP 3200
DI 10.1073/pnas.0611591104
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 142PG
UT WOS:000244661400033
PM 17360628
ER

PT J
AU Im, KS
   Fezzaa, K
   Wang, YJ
   Liu, X
   Wang, J
   Lai, MC
AF Im, Kyoung-Su
   Fezzaa, K.
   Wang, Y. J.
   Liu, X.
   Wang, Jin
   Lai, M. -C.
TI Particle tracking velocimetry using fast x-ray phase-contrast imaging
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID BLOOD FLOWS
AB The authors demonstrate the use of millisecond x-ray phase-contrast imaging for velocity measurement of particle-laden flows in an optically opaque vessel. Taking advantage of particle size polydispersity, this single-particle tracking approach is extremely effective on flows with tracer particles exhibiting a great size distribution ranging from 1 mu m to hundreds of micrometers, which is impossible for visible-light-based techniques. Furthermore, a tomographic reconstruction was applied to yield the three-dimensional flow velocity field and its particle size dependence with unprecedented sensitivity. (c) 2007 American Institute of Physics.
C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Wayne State Univ, Dept Engn Mech, Detroit, MI 48202 USA.
RP Wang, J (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM wangj@aps.anl.gov
RI wang, yujie/C-2582-2015
NR 15
TC 36
Z9 36
U1 1
U2 6
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 26
PY 2007
VL 90
IS 9
AR 091919
DI 10.1063/1.2711372
PG 3
WC Physics, Applied
SC Physics
GA 141PR
UT WOS:000244591700039
ER

PT J
AU Sutter, E
   Sutter, P
   Calarco, R
   Stoica, T
   Meijers, R
AF Sutter, Eli
   Sutter, Peter
   Calarco, Raffaella
   Stoica, Toma
   Meijers, Ralph
TI Assembly of ordered carbon shells on GaN nanowires
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID OPTICAL-PROPERTIES; GE NANOWIRES; GROWTH; HETEROSTRUCTURES;
   PHOTOLUMINESCENCE; NANOSTRUCTURES; TRANSISTORS; INN
AB In situ annealing experiments on individual group III-nitride nanowires (NWs) in a transmission electron microscope demonstrate the encapsulation of GaN wires in crystalline carbon shells in the presence of C at moderate temperatures. The complete encapsulation of GaN wires in carbon shells can be achieved when small indium metal clusters are introduced on the wire surface. No encapsulation is observed on pure GaN wires under the same conditions. The observations suggest a general processing route for the formation of semiconductor core/C-shell NW structures based on surface decoration with small metal clusters. (c) 2007 American Institute of Physics.
C1 Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
   Res Ctr Julich, Inst Bio & Nano Syst, D-52425 Julich, Germany.
   Res Ctr Julich, Ctr Nanoelect Syst Informat Technol, D-52425 Julich, Germany.
RP Sutter, E (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA.
EM esutter@bnl.gov
RI Calarco, Raffaella/B-8218-2011
NR 24
TC 6
Z9 6
U1 0
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 26
PY 2007
VL 90
IS 9
AR 093118
DI 10.1063/1.2710189
PG 3
WC Physics, Applied
SC Physics
GA 141PR
UT WOS:000244591700090
ER

PT J
AU Topaz, A
   West, BA
   Gfroerer, TH
   Wanlass, MW
AF Topaz, A.
   West, B. A.
   Gfroerer, T. H.
   Wanlass, M. W.
TI Using the excitation-dependent radiative efficiency to assess asymmetry
   in the defect-related density of states
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID HETEROSTRUCTURES; TRANSPORT
AB Measurements of steady-state radiative efficiency versus photoexcitation rate probe the carrier-density-dependent competition between nonradiative and radiative mechanisms in semiconductors. Nonradiative recombination through defect levels is proportional to the product of defect level occupation and carrier density in the opposing band. Band-to-band radiative recombination scales with the product of band densities. The excitation rate required for defect level saturation establishes the effective density of participating defects. More subtle features in the changeover from defect-related to radiative-dominated recombination, and its temperature dependence, provide additional insight into the distribution of defect levels. In this letter, the authors consider the effect of asymmetry about the midgap. (c) 2007 American Institute of Physics.
C1 Davidson Coll, Davidson, NC 28035 USA.
   Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Gfroerer, TH (reprint author), Davidson Coll, Davidson, NC 28035 USA.
EM tigfroerer@davidson.edu
NR 11
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 26
PY 2007
VL 90
IS 9
AR 092110
DI 10.1063/1.2709986
PG 3
WC Physics, Applied
SC Physics
GA 141PR
UT WOS:000244591700049
ER

PT J
AU Van Gestel, D
   Romero, MJ
   Gordon, I
   Carnel, L
   D'Haen, J
   Beaucarne, G
   Al-Jassim, M
   Poortmans, J
AF Van Gestel, D.
   Romero, M. J.
   Gordon, I.
   Carnel, L.
   D'Haen, J.
   Beaucarne, G.
   Al-Jassim, M.
   Poortmans, J.
TI Electrical activity of intragrain defects in polycrystalline silicon
   layers obtained by aluminum-induced crystallization and epitaxy
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID SOLAR-CELLS; THIN-FILMS; CATHODOLUMINESCENCE; PHOTOLUMINESCENCE;
   DISLOCATIONS; MECHANISM; BAND
AB Defect etching revealed a very large density (similar to 10(9) cm(-2)) of intragrain defects in polycrystalline silicon (pc-Si) layers obtained through aluminum-induced crystallization of amorphous Si and epitaxy. Electron-beam-induced current measurements showed a strong recombination activity at these defects. Cathodoluminescence measurements showed the presence of two deep-level radiative transitions (0.85 and 0.93 eV) with a relative intensity varying from grain to grain. These results indicate that the unexpected quasi-independence on the grain size of the open-circuit voltage of these pc-Si solar cells is due to the presence of numerous electrically active intragrain defects. (c) 2007 American Institute of Physics.
C1 IMEC, B-3001 Louvain, Belgium.
   Natl Renewable Energy Lab, Golden, CO 80401 USA.
   Hasselt Univ, Mat Res Inst, B-3590 Diepenbeek, Belgium.
   IMEC, Div IMOMEC, B-3590 Diepenbeek, Belgium.
   Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Van Gestel, D (reprint author), IMEC, Kapeldreef 75, B-3001 Louvain, Belgium.
EM dries.vangestel@imec.be
RI D'Haen, Jan/K-1938-2016
NR 18
TC 28
Z9 28
U1 1
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 26
PY 2007
VL 90
IS 9
AR 092103
DI 10.1063/1.2709643
PG 3
WC Physics, Applied
SC Physics
GA 141PR
UT WOS:000244591700042
ER

PT J
AU Moore, MNJ
   Gray, LJ
   Kaplan, T
AF Moore, M. N. J.
   Gray, L. J.
   Kaplan, T.
TI Evaluation of supersingular integrals: Second-order boundary derivatives
SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
LA English
DT Article
DE boundary integral method; surface derivatives; supersingular integrals;
   boundary limit
ID POTENTIAL GRADIENT; HYPERSINGULAR INTEGRALS; SURFACE DERIVATIVES;
   ELEMENT METHOD; GALERKIN; EQUATIONS; FORMULATION; PLATES; BEM
AB The boundary integral representation of second-order derivatives of the primary function involves second-order (hypersingular) and third-order (supersingular) derivatives of the Green's function. By defining these highly singular integrals as a difference of boundary limits, interior minus exterior, the limiting values are shown to exist. With a Galerkin formulation, coincident and edge-adjacent supersingular integrals are separately divergent, but the sum is finite, while the individual hypersingular integrals are finite. Moreover, the cancellation of the supersingular divergent terms only requires a continuous interpolation of the surface potential, and there is no continuity requirement on the surface flux. The algorithm is efficient, the non-singular integrals vanish and the singular integrals are computed entirely analytically, and accurate values are obtained for smooth surfaces. However, it is shown that a (continuous) linear interpolation is not appropriate for evaluation at boundary corners. Published in 2006 by John Wiley & Sons, Ltd.
C1 Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
   Univ N Carolina, Dept Math, Chapel Hill, NC 27599 USA.
RP Gray, LJ (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA.
EM ljg@ornl.gov
NR 32
TC 11
Z9 11
U1 1
U2 4
PU JOHN WILEY & SONS LTD
PI CHICHESTER
PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND
SN 0029-5981
J9 INT J NUMER METH ENG
JI Int. J. Numer. Methods Eng.
PD FEB 26
PY 2007
VL 69
IS 9
BP 1930
EP 1947
DI 10.1002/nme.1835
PG 18
WC Engineering, Multidisciplinary; Mathematics, Interdisciplinary
   Applications
SC Engineering; Mathematics
GA 141ZC
UT WOS:000244616800007
ER

PT J
AU Fowlkes, JD
   Fitz-Gerald, JM
   Rack, PD
AF Fowlkes, J. D.
   Fitz-Gerald, J. M.
   Rack, P. D.
TI Ultraviolet emitting (Y1-xGdx)(2)O3-delta thin films deposited by radio
   frequency magnetron sputtering; structure-property-thin film processing
   relationships
SO THIN SOLID FILMS
LA English
DT Article
DE yttrium oxide; gadolinium; X-ray diffraction; luminescence
ID CRYSTALLINE Y2O3 FILM; YTTRIUM-OXIDE; PHASE-TRANSITIONS; BEAM
   DEPOSITION; GROWTH; SI(100); SILICON; OXYGEN; SI; MICROSTRUCTURE
AB The effects that the oxygen partial pressure, substrate temperature and annealing temperature have on the cathodoluminescence (CL) efficiency of radio frequency magnetron sputter deposited Gd-doped Y2O3 thin films is investigated. Furthermore these sputtering parameters are correlated to the degree of crystallinity, the phases present (cubic (a) versus monoclinic (p) Y2O3), and the stoichiometry of the thin films. Films deposited at room temperature (RT) did not CL, however, the films were activated by a post-deposition anneal at 1273 K for 6 h. Films deposited at 873 K had a very low CL efficiency which was significantly enhanced by a post-deposition anneal. For RT deposited films the external CL efficiency increased with increasing oxygen partial pressure for the range studied, however the opposite trend was observed for the 873 K deposited films. Examination of the morphology and grain size of the high temperature deposited films revealed that the average grain size increased with decreasing partial pressure and the observed increase in the external CL efficiency was attributed to enhanced anomalous diffraction. An intrinsic CL efficiency term was deten-nined to circumvent the effects of the enhanced anomalous diffraction, and the CL efficiency was correlated to the integrated intensity of the (222) of the cubic U-Y2O3 phase. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA.
   Oak Ridge Natl Lab, Mol Scale Engn & Nanoscale Technol Res Grp, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
RP Fowlkes, JD (reprint author), Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
EM fo2@ornl.gov
OI Rack, Philip/0000-0002-9964-3254
NR 36
TC 3
Z9 3
U1 3
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD FEB 26
PY 2007
VL 515
IS 7-8
BP 3488
EP 3498
DI 10.1016/j.tsf.2006.10.108
PG 11
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 144VS
UT WOS:000244825100028
ER

PT J
AU Lima, AL
   Zhang, X
   Misra, A
   Booth, CH
   Bauer, ED
   Hundley, MF
AF Lima, A. L.
   Zhang, X.
   Misra, A.
   Booth, C. H.
   Bauer, E. D.
   Hundley, M. F.
TI Length scale effects on the electronic transport properties of
   nanometric Cu/Nb multilayers
SO THIN SOLID FILMS
LA English
DT Article
DE metal multilayers; transmission electron microscopy; transport
   properties
ID METALLIC-FILMS; ELECTRICAL-RESISTIVITY; THERMAL-STABILITY; THIN-FILMS;
   BEHAVIOR; CU
AB In this paper, we investigated the contributions of the interface and grain boundary scattering to the resistivity of Cu/Nb multilayers with several bilayers thickness. We carried out temperature-dependent resistivity, transmission electron microscopy (TEM), and X-ray absorption fine structure (XAFS) measurements. We investigated possible structural changes inside the Cu layer by using XAFS measurements which indicated that the local structure around Cu sites remains face centered cubic even for the shortest bilayer period. Also, we obtained the grain size values by using TEM measurements so that we could evaluate the grain boundary contribution to the resistivity. The resistivity seems to be related to the thickness of the individual layers rather than the total film thickness. Our results agree well with theoretical calculations and we were able to obtain the relative importance of the grain boundary and the interface scattering. We found a clear correlation between fine structure length scales (grain size and layer thickness) and macroscopic properties (resistivity). Published by Elsevier B.V.
C1 Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
   Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
   Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA.
RP Lima, AL (reprint author), RIKEN, Hirosawa 1-2, Wako, Saitama 3510198, Japan.
EM limaana02@hotmail.com
RI Booth, Corwin/A-7877-2008; Bauer, Eric/D-7212-2011; Misra,
   Amit/H-1087-2012; Zhang, Xinghang/H-6764-2013; 
OI Zhang, Xinghang/0000-0002-8380-8667; Bauer, Eric/0000-0003-0017-1937
NR 16
TC 10
Z9 12
U1 0
U2 17
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD FEB 26
PY 2007
VL 515
IS 7-8
BP 3574
EP 3579
DI 10.1016/j.tsf.2006.11.004
PG 6
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 144VS
UT WOS:000244825100041
ER

PT J
AU Kaydanova, T
   Miedaner, A
   Perkins, JD
   Curtis, C
   Alleman, JL
   Ginley, DS
AF Kaydanova, T.
   Miedaner, A.
   Perkins, J. D.
   Curtis, C.
   Alleman, J. L.
   Ginley, D. S.
TI Direct-write inkjet printing for fabrication of barium strontium
   titanate-based tunable circuits
SO THIN SOLID FILMS
LA English
DT Article
DE direct write; inkjet; BST; tunable circuits
ID THIN-FILMS; METALLOORGANIC PRECURSORS; DIELECTRIC-CONSTANT; CAPACITORS;
   DECOMPOSITION; TUNABILITY; BATIO3
AB Tunable capacitors with up to 30% tuning and a loss tangent (tan delta) less than 0.002 at 1 MHz were fabricated from Ba0.6Sr0.4TiO3 (BST) films using inkjet-printed liquid metalorganic precursors. BST films of various thicknesses were produced by printing multiple stacks of the individual inkjet-printed layers. The dielectric constant of the printed films increased as a function of thickness. The largest dielectric constant, 1000, and the highest tunability, 30%, were measured on a 420 mn thick film, the thickest film studied in this work. Spray-printed silver contacts were employed and demonstrated good adhesion and good electrical contact to the inkjet-printed BST films. This also demonstrated proof of principle for direct-write printing of metal contacts onto BST films from metalorganic sources. (c) 2006 Elsevier B.V. All rights reserved.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
RP Kaydanova, T (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM tatiana_kaydanova@nrel.gov
NR 23
TC 26
Z9 28
U1 5
U2 16
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0040-6090
J9 THIN SOLID FILMS
JI Thin Solid Films
PD FEB 26
PY 2007
VL 515
IS 7-8
BP 3820
EP 3824
DI 10.1016/j.tsf.2006.10.009
PG 5
WC Materials Science, Multidisciplinary; Materials Science, Coatings &
   Films; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Physics
GA 144VS
UT WOS:000244825100083
ER

PT J
AU Denton, MH
   Thomsen, MF
   Lavraud, B
   Henderson, MG
   Skoug, RM
   Funsten, HO
   Jahn, JM
   Pollock, CJ
   Weygand, JM
AF Denton, M. H.
   Thomsen, M. F.
   Lavraud, B.
   Henderson, M. G.
   Skoug, R. M.
   Funsten, H. O.
   Jahn, J. -M.
   Pollock, C. J.
   Weygand, J. M.
TI Transport of plasma sheet material to the inner magnetosphere
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID GEOSYNCHRONOUS ORBIT; ANALYZER; SUBSTORM; IMAGES; TIME
AB The reaction of the plasma sheet in response to an increase in magnetospheric convection is examined using a combination of energetic neutral atom (ENA) imaging and in situ observations. Data from the IMAGE/MENA instrument are examined in conjunction with observations from the magnetospheric plasma analyzer (MPA) instrument onboard the Los Alamos 1994-084 satellite located in geosynchronous orbit. Examination of the MENA data during an enhanced convection event reveal that between 12: 00 and 14: 30 UT on 26 June 2001, ENA emissions from the plasma sheet material are observed to strengthen and move Earthwards. A simple calculation of the motion of the peak in ENA emissions following an increase in the convection gives an averaged speed of this sunward surge of around 8 km s(-1) between 12: 00 and 14: 30 UT.
C1 SW Res Inst, San Antonio, TX 78238 USA.
   Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Denton, MH (reprint author), Univ Lancaster, Dept Commun Syst, Lancaster LA1 4WA, England.
EM m.denton@lancaster.ac.uk
RI Funsten, Herbert/A-5702-2015; Henderson, Michael/A-3948-2011; 
OI Funsten, Herbert/0000-0002-6817-1039; Henderson,
   Michael/0000-0003-4975-9029; Denton, Michael/0000-0002-1748-3710
NR 19
TC 13
Z9 13
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD FEB 24
PY 2007
VL 34
IS 4
AR L04105
DI 10.1029/2006GL027886
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 140AS
UT WOS:000244475000001
ER

PT J
AU Sen, A
   Baxa, U
   Simon, MN
   Wall, JS
   Sabate, R
   Saupe, SJ
   Steven, AC
AF Sen, Anindito
   Baxa, Ulrich
   Simon, Martha N.
   Wall, Joseph S.
   Sabate, Raimon
   Saupe, Sven J.
   Steven, Alasdair C.
TI Mass analysis by scanning transmission electron microscopy and electron
   diffraction validate predictions of stacked beta-solenoid model of HET-s
   prion fibrils
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID FUNGUS PODOSPORA-ANSERINA; SACCHAROMYCES-CEREVISIAE; IN-VITRO;
   HETEROKARYON INCOMPATIBILITY; HYDROGEN/DEUTERIUM EXCHANGE; AMYLOID
   FIBRILS; CORE STRUCTURE; PROTEIN; DOMAIN; URE2P
AB Fungal prions are infectious filamentous polymers of proteins that are soluble in uninfected cells. In its prion form, the HET-s protein of Podospora anserina participates in a fungal self/nonself recognition phenomenon called heterokaryon incompatibility. Like other prion proteins, HET-s has a so-called "prion domain" (its C-terminal region, HET-s-(218-289)) that is responsible for induction and propagation of the prion in vivo and for fibril formation in vitro. Prion fibrils are thought to have amyloid backbones of polymerized prion domains. A relatively detailed model has been proposed for prion domain fibrils of HET-s based on a variety of experimental constraints (Ritter, C., Maddelein, M. L., Siemer, A. B., Luhrs, T., Ernst, M., Meier, B. H., Saupe, S. J., and Riek, R. (2005) Nature 435, 844 - 848). To test specific predictions of this model, which envisages axial stacking of beta-solenoids with two coils per subunit, we examined fibrils by electron microscopy. Electron diffraction gave a prominent meridional reflection at (0.47 nm)(-1), indicative of cross-P structure, as predicted. STEM (scanning transmission electron microscopy) mass-per-unit-length measurements yielded 1.02 +/- 0.16 subunits per 0.94 nm, in agreement with the model prediction (I subunit per 0.94 nm). This is half the packing density of similar to I subunit per 0.47 nm previously obtained for fibrils of the yeast prion proteins, Ure2p and Sup35p, whence it follows that the respective amyloid architectures are basically different.
C1 NIH, Struct Biol Lab, Bethesda, MD 20892 USA.
   NIH, NIAMSD, Bethesda, MD 20892 USA.
   Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
   Univ Bordeaux 2, CNRS, UMR 5095,Inst Biochim & Genet Cellulaire, Lab Genet Mol Champignons, F-33077 Bordeaux, France.
RP Steven, AC (reprint author), NIH, Struct Biol Lab, Bldg 50,Rm 1517,50 S Dr MSC 8025, Bethesda, MD 20892 USA.
EM Alasdair_Steven@nih.gov
OI saupe, sven/0000-0002-5589-721X; sabate, raimon/0000-0003-3894-2362
FU Intramural NIH HHS; NIBIB NIH HHS [5 P41 EB2181]
NR 41
TC 57
Z9 57
U1 1
U2 7
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD FEB 23
PY 2007
VL 282
IS 8
BP 5545
EP 5550
DI 10.1074/jbc.M611464200
PG 6
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 140CZ
UT WOS:000244482300050
PM 17178708
ER

PT J
AU Lesnyak, DV
   Osipiuk, J
   Skarina, T
   Sergiev, PV
   Bogdanov, AA
   Edwards, A
   Savchenko, A
   Joachimiak, A
   Dontsova, OA
AF Lesnyak, Dmitry V.
   Osipiuk, Jerzy
   Skarina, Tatiana
   Sergiev, Petr V.
   Bogdanov, Alexey A.
   Edwards, Aled
   Savchenko, Alexei
   Joachimiak, Andrzej
   Dontsova, Olga A.
TI Methyltransferase that modifies guanine 966 of the 16 S rRNA -
   Functional identification and tertiary structure
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID ESCHERICHIA-COLI; PROTEIN-STRUCTURE; M(5)C967 METHYLTRANSFERASE;
   ANGSTROM RESOLUTION; SECONDARY-STRUCTURE; 16S-RIBOSOMAL RNA; MODEL;
   PURIFICATION; DIFFRACTION; SUBUNIT
AB N-2-Methylguanine 966 is located in the loop of Escherichia coli 16 S rRNA helix 31, forming a part of the P-site tRNA-binding pocket. We found yhhF to be a gene encoding for m(2)G966 specific 16 S rRNA methyltransferase. Disruption of the yhhF gene by kanamycin resistance marker leads to a loss of modification at G966. The modification could be rescued by expression of recombinant protein from the plasmid carrying the yhhF gene. Moreover, purified m(2)G966 methyltransferase, in the presence of S-adenosylomethionine (AdoMet), is able to methylate 30 S ribosomal subunits that were purified from yhhF knock-out strain in vitro. The methylation is specific for G966 base of the 16 S rRNA. The m(2)G966 methyltransferase was crystallized, and its structure has been determined and refined to 2.05 angstrom. The structure closely resembles RsmC rRNA methyltransferase, specific for m(2)G1207 of the 16 S rRNA. Structural comparisons and analysis of the enzyme active site suggest modes for binding AdoMet and rRNA to m(2)G966 methyltransferase. Based on the experimental data and current nomenclature the protein expressed from the yhhF gene was renamed to RsmD. A model for interaction of RsmD with ribosome has been proposed.
C1 Argonne Natl Lab, Midwest Ctr Struct Genom, Biosci Div, Argonne, IL 60439 USA.
   Argonne Natl Lab, Struct Biol Ctr, Biosci Div, Argonne, IL 60439 USA.
   Moscow MV Lomonosov State Univ, Dept Bioinformat & Bioengn, Moscow 119992, Russia.
   Univ Toronto, Banting & Best Dept Med Res, Toronto, ON M5G 1L6, Canada.
   Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia.
   Moscow MV Lomonosov State Univ, AN Belozersky Inst Physicochem Biol, Moscow 119992, Russia.
RP Joachimiak, A (reprint author), Argonne Natl Lab, Midwest Ctr Struct Genom, Biosci Div, 9700 S Cass Ave,Bldg 202, Argonne, IL 60439 USA.
EM andrzejj@anl.gov; dontsova@genebee.msu.su
RI Sergiev, Petr/D-7493-2012; Bogdanov, Alexey/L-1407-2013
FU NIGMS NIH HHS [P50 GM062414, U54 GM074942-04S2, GM074942, GM62414, P50
   GM062414-01, U54 GM074942]
NR 50
TC 47
Z9 48
U1 0
U2 2
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD FEB 23
PY 2007
VL 282
IS 8
BP 5880
EP 5887
DI 10.1074/jbc.M608214200
PG 8
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 140CZ
UT WOS:000244482300084
PM 17189261
ER

PT J
AU Ahmad, T
   Guiochon, G
AF Ahmad, Tarab
   Guiochon, Georges
TI Numerical determination of the adsorption isotherms of tryptophan at
   different temperatures and mobile phase compositions
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article
DE liquid chromatography; adsorption isotherms; inverse method; tryptophan
ID OVERLOADED BAND PROFILES; ADSORBATE-ADSORBATE INTERACTIONS;
   LIQUID-CHROMATOGRAPHY; IONIC-STRENGTH; IONIZABLE COMPOUNDS; ELUTION;
   BEHAVIOR; RETENTION; PARAMETERS; MECHANISM
AB Single-component adsorption isotherm data were acquired by frontal analysis (FA) for tryptophan on a C-18-Kromasil packed column, using acetonitrile-water solutions of various compositions (2.5, 5, and 7.5% ACN+1% acetic acid) and at five different temperatures between 25 and 65 degrees C. The adsorption isotherm model accounting best for these data is the bi-Moreau model, showing that two types of adsorption sites coexist on the surface and that strong adsorbate-adsorbate interactions take place. Large concentration band profiles of tryptophan were obtained for the three mobile phase compositions, at five different temperatures and the best values of the adsorption isotherm coefficients were determined by the inverse method (IM) of chromatography. The advantages and drawbacks of using the FA and the IM for determining the coefficients of the adsorption isotherm of tryptophan under the experimental conditions selected are discussed. The results of the FA and IM measurements are in good agreement. Both indicate that the retention time of tryptophan decreases rapidly with increasing acetonitrile concentration in the mobile phase as well as the saturation capacities of the two types of adsorption sites, with the highest values of the two saturation capacities being found for the lowest ACN content and the lowest temperature. The adsorption constant on the low-energy sites decreases with increasing acetonitrile content and temperature. In contrast, the adsorption constant on the high-energy sites increases with increasing ACN content of the mobile phase but decreases with increasing temperature. The solute-solute interaction parameters for the low and the high-energy adsorption sites increase rapidly with increasing ACN concentration in the mobile phase and with increasing temperature. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, 552 Buehler Hall, Knoxville, TN 37996 USA.
EM guiochon@utk.edu
NR 41
TC 10
Z9 11
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD FEB 23
PY 2007
VL 1142
IS 2
BP 148
EP 163
DI 10.1016/j.chroma.2006.12.087
PG 16
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 140YI
UT WOS:000244542400004
PM 17229430
ER

PT J
AU Goldstein, RZ
   Tomasi, D
   Rajaram, S
   Cottone, LA
   Zhang, L
   Maloney, T
   Telang, F
   Alia-Klein, N
   Volkow, ND
AF Goldstein, R. Z.
   Tomasi, D.
   Rajaram, S.
   Cottone, L. A.
   Zhang, L.
   Maloney, T.
   Telang, F.
   Alia-Klein, N.
   Volkow, N. D.
TI Role of the anterior cingulate and medial orbitofrontal cortex in
   processing drug cues in cocaine addiction
SO NEUROSCIENCE
LA English
DT Article
DE emotional Stroop interference; inhibitory control; cognitive conflict;
   attention bias; drug addiction; fMRI BOLD
ID ATTENTIONAL BIAS; STROOP PARADIGM; NEURAL SYSTEMS; ACTIVATION;
   DYSFUNCTION; ALCOHOL; USERS; STIMULI; ABUSERS; TASK
AB Our goal in the current report was to design a new functional magnetic resonance imaging (fMRI) task to probe the role of the anterior cingulate cortex (ACC) and orbitofrontal cortex (OFC) in processing of salient symptom-related cues during the simultaneous performance of an unrelated task in drug-addicted persons. We used a novel fMRI color-word drug Stroop task in 14 individuals with cocaine use disorders; subjects had to press for color of drug vs. matched neutral words. Although there were no accuracy or speed differences between the drug and neutral conditions in the current sample of subjects, drug words were more negatively valenced than the matched neutral words. Further, consistent with prior reports in individuals with other psychopathologies using different Stroop fMRI paradigms, our more classical color-word Stroop design revealed bilateral activations in the caudal-dorsal anterior cingulate cortex (cdACC) and hypoactivations in the rostro-ventral anterior cingulate cortex/medial orbitofrontal cortex (rACC/mOFC). A trend for larger rACC/mOFC hypoactivations to the drug than neutral words did not survive whole-brain corrections. Nevertheless, correlation analyses indicated that (1) the more the cdACC drug-related activation, the more negative the valence attributed to the drug words (r=-0.86, P < 0.0001) but not neutral words; and (2) the more the rACC/mOFC hypoactivation to drug minus neutral words, the more the errors committed specifically to the drug minus neutral words (r=0.85, P < 0.0001). Taken together, results suggest that this newly developed drug Stroop fMRI task may be a sensitive biobehavioral assay of the functions recruited for the regulation of responses to salient symptom-related stimuli in drug-addicted individuals. (c) 2006 IBRO. Published by Elsevier Ltd. All rights reserved.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
   SUNY Stony Brook, Stony Brook, NY 11794 USA.
   NIDA, Bethesda, MD 20892 USA.
RP Goldstein, RZ (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA.
EM rgoldstein@bnl.gov
RI Tomasi, Dardo/J-2127-2015
FU NCRR NIH HHS [5M01 RR 10710, M01 RR010710]; NIDA NIH HHS [1K23 DA
   15517-01, K23 DA015517, R03 DA 017070-01, R03 DA017070]
NR 36
TC 140
Z9 151
U1 4
U2 17
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0306-4522
J9 NEUROSCIENCE
JI Neuroscience
PD FEB 23
PY 2007
VL 144
IS 4
BP 1153
EP 1159
DI 10.1016/j.neuroscience.2006.11.024
PG 7
WC Neurosciences
SC Neurosciences & Neurology
GA 137SS
UT WOS:000244313100001
PM 17197102
ER

PT J
AU Aubert, B
   Barate, R
   Bona, M
   Boutigny, D
   Couderc, F
   Karyotakis, Y
   Lees, JP
   Poireau, V
   Tisserand, V
   Zghiche, A
   Grauges, E
   Palano, A
   Chen, JC
   Qi, ND
   Rong, G
   Wang, P
   Zhu, YS
   Eigen, G
   Ofte, I
   Stugu, B
   Abrams, GS
   Battaglia, M
   Brown, DN
   Button-Shafer, J
   Cahn, RN
   Charles, E
   Gill, MS
   Groysman, Y
   Jacobsen, RG
   Kadyk, JA
   Kerth, LT
   Kolomensky, YG
   Kukartsev, G
   Lynch, G
   Mir, LM
   Oddone, PJ
   Orimoto, TJ
   Pripstein, M
   Roe, NA
   Ronan, MT
   Suzuki, A
   Troost, D
   Wenzel, WA
   Barrett, M
   Ford, KE
   Harrison, TJ
   Hart, AJ
   Hawkes, CM
   Morgan, SE
   Watson, AT
   Goetzen, K
   Held, T
   Koch, H
   Lewandowski, B
   Pelizaeus, M
   Peters, K
   Schroeder, T
   Steinke, M
   Boyd, JT
   Burke, JP
   Cottingham, WN
   Walker, D
   Cuhadar-Donszelmann, T
   Fulsom, BG
   Hearty, C
   Knecht, NS
   Mattison, TS
   McKenna, JA
   Khan, A
   Kyberd, P
   Saleem, M
   Teodorescu, L
   Blinov, VE
   Bukin, AD
   Druzhinin, VP
   Golubev, VB
   Onuchin, AP
   Serednyakov, SI
   Skovpen, YI
   Solodov, EP
   Todyshev, KY
   Best, DS
   Bondioli, M
   Bruinsma, M
   Chao, M
   Curry, S
   Eschrich, I
   Kirkby, D
   Lankford, AJ
   Lund, P
   Mandelkern, M
   Mommsen, RK
   Roethel, W
   Stoker, DP
   Abachi, S
   Buchanan, C
   Foulkes, SD
   Gary, JW
   Long, O
   Shen, BC
   Wang, K
   Zhang, L
   Hadavand, HK
   Hill, EJ
   Paar, HP
   Rahatlou, S
   Sharma, V
   Berryhill, JW
   Campagnari, C
   Cunha, A
   Dahmes, B
   Hong, TM
   Kovalskyi, D
   Richman, JD
   Beck, TW
   Eisner, AM
   Flacco, CJ
   Heusch, CA
   Kroseberg, J
   Lockman, WS
   Nesom, G
   Schalk, T
   Schumm, BA
   Seiden, A
   Spradlin, P
   Williams, DC
   Wilson, MG
   Albert, J
   Chen, E
   Dvoretskii, A
   Hitlin, DG
   Narsky, I
   Piatenko, T
   Porter, FC
   Ryd, A
   Samuel, A
   Andreassen, R
   Mancinelli, G
   Meadows, T
   Sokoloff, MD
   Blanc, F
   Bloom, PC
   Chen, S
   Ford, WT
   Hirschauer, JF
   Kreisel, A
   Nauenberg, U
   Olivas, A
   Ruddick, WO
   Smith, JG
   Ulmer, KA
   Wagner, SR
   Zhang, J
   Chen, A
   Eckhart, EA
   Soffer, A
   Toki, WH
   Wilson, RJ
   Winklmeier, F
   Zeng, Q
   Altenburg, DD
   Feltresi, E
   Hauke, A
   Jasper, H
   Spaan, B
   Brandt, T
   Klose, V
   Lacker, HM
   Mader, WF
   Nogowski, R
   Petzold, A
   Schubert, J
   Schubert, KR
   Schwierz, R
   Sundermann, JE
   Volk, A
   Bernard, D
   Bonneaud, GR
   Grenier, P
   Latour, E
   Thiebaux, C
   Verderi, M
   Bard, DJ
   Clark, PJ
   Gradl, W
   Muheim, F
   Playfer, S
   Robertson, AI
   Xie, Y
   Andreotti, M
   Bettoni, D
   Bozzi, C
   Calabrese, R
   Cibinetto, G
   Luppi, E
   Negrini, M
   Petrella, A
   Piemontese, L
   Prencipe, E
   Anulli, F
   Baldini-Ferroli, R
   Calcaterra, A
   de Sangro, R
   Finocchiaro, G
   Pacetti, S
   Patteri, P
   Peruzzi, IM
   Piccolo, M
   Rama, M
   Zallo, A
   Buzzo, A
   Capra, R
   Contri, R
   Lo Vetere, M
   Macri, MM
   Monge, MR
   Passaggio, S
   Patrignani, C
   Robutti, E
   Santroni, A
   Tosi, S
   Brandenburg, G
   Chaisanguanthum, KS
   Morii, M
   Wu, J
   Dubitzky, RS
   Marks, J
   Schenk, S
   Uwer, U
   Bhimji, W
   Bowerman, DA
   Dauncey, PD
   Egede, U
   Flack, RL
   Gaillard, JR
   Nash, JA
   Nikolich, MB
   Vazquez, WP
   Chai, X
   Charles, MJ
   Mallik, U
   Meyer, NT
   Ziegler, V
   Cochran, J
   Crawley, HB
   Dong, L
   Eyges, V
   Meyer, WT
   Prell, S
   Rosenberg, EI
   Rubin, AE
   Gritsan, AV
   Fritsch, M
   Schott, G
   Arnaud, N
   Davier, M
   Grosdidier, G
   Hocker, A
   Le Diberder, F
   Lepeltier, V
   Lutz, AM
   Oyanguren, A
   Pruvot, S
   Rodier, S
   Roudeau, P
   Schune, MH
   Stocchi, A
   Wang, WF
   Wormser, G
   Cheng, CH
   Lange, DJ
   Wright, DM
   Chavez, CA
   Forster, IJ
   Fry, JR
   Gabathuler, E
   Gamet, R
   George, KA
   Hutchcroft, DE
   Payne, DJ
   Schofield, KC
   Touramanis, C
   Bevan, AJ
   Di Lodovico, F
   Menges, W
   Sacco, R
   Brown, CL
   Cowan, G
   Flaecher, HU
   Hopkins, DA
   Jackson, PS
   McMahon, TR
   Ricciardi, S
   Salvatore, F
   Brown, DN
   Davis, CL
   Allison, J
   Barlow, NR
   Barlow, RJ
   Chia, YM
   Edgar, CL
   Kelly, MP
   Lafferty, GD
   Naisbit, MT
   Williams, JC
   Yi, JI
   Chen, C
   Hulsbergen, WD
   Jawahery, A
   Lae, CK
   Roberts, DA
   Simi, G
   Blaylock, G
   Dallapiccola, C
   Hertzbach, SS
   Li, X
   Moore, TB
   Saremi, S
   Staengle, H
   Willocq, SY
   Cowan, R
   Koeneke, K
   Sciolla, G
   Sekula, SJ
   Spitznagel, M
   Taylor, F
   Yamamoto, RK
   Kim, H
   Patel, PM
   Robertson, SH
   Lazzaro, A
   Lombardo, V
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   Roodman, A
   Salnikov, AA
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   Snyder, A
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   Suzuki, K
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   Thompson, JM
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   Wittgen, M
   Wright, DH
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   Azzolini, V
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   Bhuyan, B
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   Nugent, IM
   Roney, JM
   Sobie, RJ
   Back, JJ
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   Latham, TE
   Mohanty, GB
   Pappagallo, M
   Band, HR
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   Eichenbaum, AM
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   Lombardo, V.
   Palombo, F.
   Bauer, J. M.
   Cremaldi, L.
   Eschenburg, V.
   Godang, R.
   Kroeger, R.
   Reidy, J.
   Sanders, D. A.
   Summers, D. J.
   Zhao, H. W.
   Brunet, S.
   Cote, D.
   Taras, P.
   Viaud, F. B.
   Nicholson, H.
   Cavallo, N.
   De Nardo, G.
   del Re, D.
   Fabozzi, F.
   Gatto, C.
   Lista, L.
   Monorchio, D.
   Paolucci, P.
   Piccolo, D.
   Sciacca, C.
   Baak, M.
   Bulten, H.
   Raven, G.
   Snoek, H. L.
   Jessop, C. P.
   LoSecco, J. M.
   Allmendinger, T.
   Benelli, G.
   Gan, K. K.
   Honscheid, K.
   Hufnagel, D.
   Jackson, P. D.
   Kagan, H.
   Kass, R.
   Pulliam, T.
   Rahimi, A. M.
   Ter-Antonyan, R.
   Wong, Q. K.
   Blount, N. L.
   Brau, J.
   Frey, R.
   Igonkina, O.
   Lu, M.
   Potter, C. T.
   Rahmat, R.
   Sinev, N. B.
   Strom, D.
   Strube, J.
   Torrence, E.
   Galeazzi, F.
   Gaz, A.
   Margoni, M.
   Morandin, M.
   Pompili, A.
   Posocco, M.
   Rotondo, M.
   Simonetto, F.
   Stroili, R.
   Voci, C.
   Benayoun, M.
   Chauveau, J.
   David, P.
   Del Buono, L.
   de la Vaissiere, Ch.
   Hamon, O.
   Hartfiel, B. L.
   John, M. J. J.
   Malcles, J.
   Ocariz, J.
   Roos, L.
   Therin, G.
   Behera, P. K.
   Gladney, L.
   Panetta, J.
   Biasini, M.
   Covarelli, R.
   Pioppi, M.
   Angelini, C.
   Batignani, G.
   Bettarini, S.
   Bucci, F.
   Calderini, G.
   Carpinelli, M.
   Cenci, R.
   Forti, F.
   Giorgi, M. A.
   Lusiani, A.
   Marchiori, G.
   Mazur, M. A.
   Morganti, M.
   Neri, N.
   Paoloni, E.
   Rizzo, G.
   Walsh, J.
   Haire, M.
   Judd, D.
   Wagoner, D. E.
   Biesiada, J.
   Danielson, N.
   Elmer, P.
   Lau, Y. P.
   Lu, C.
   Olsen, J.
   Smith, A. J. S.
   Telnov, A. V.
   Bellini, F.
   Cavoto, G.
   D'Orazio, A.
   Di Marco, E.
   Faccini, R.
   Ferrarotto, F.
   Ferroni, F.
   Gaspero, M.
   Li Gioi, L.
   Mazzoni, M. A.
   Morganti, S.
   Piredda, G.
   Polci, F.
   Tehrani, F. Safai
   Voena, C.
   Ebert, M.
   Schroeder, H.
   Waldi, R.
   Adye, T.
   De Groot, N.
   Franek, B.
   Olaiya, E. O.
   Wilson, F. F.
   Emery, S.
   Gaidot, A.
   Ganzhur, S. F.
   de Monchenault, G. Hamel
   Kozanecki, W.
   Legendre, M.
   Vasseur, G.
   Yeche, Ch.
   Zito, M.
   Park, W.
   Purohit, M. V.
   Wilson, J. R.
   Allen, M. T.
   Aston, D.
   Bartoldus, R.
   Bechtle, P.
   Berger, N.
   Boyarski, A. M.
   Claus, R.
   Coleman, J. P.
   Convery, M. R.
   Cristinziani, M.
   Dingfelder, J. C.
   Dong, D.
   Dorfan, J.
   Dubois-Felsmann, G. P.
   Dujmic, D.
   Dunwoodie, W.
   Field, R. C.
   Glanzman, T.
   Gowdy, S. J.
   Graham, M. T.
   Halyo, V.
   Hast, C.
   Hryn'ova, T.
   Innes, W. R.
   Kelsey, M. H.
   Kim, P.
   Kocian, M. L.
   Leith, D. W. G. S.
   Li, S.
   Libby, J.
   Luitz, S.
   Luth, V.
   Lynch, H. L.
   MacFarlane, D. B.
   Marsiske, H.
   Messner, R.
   Muller, D. R.
   O'Grady, C. P.
   Ozcan, V. E.
   Perl, M.
   Perazzo, A.
   Ratcliff, B. N.
   Roodman, A.
   Salnikov, A. A.
   Schindler, R. H.
   Schwiening, J.
   Snyder, A.
   Stelzer, J.
   Su, D.
   Sullivan, M. K.
   Suzuki, K.
   Swain, S. K.
   Thompson, J. M.
   Va'vra, J.
   van Bakel, N.
   Weaver, M.
   Weinstein, A. J. R.
   Wisniewski, W. J.
   Wittgen, M.
   Wright, D. H.
   Yarritu, A. K.
   Yi, K.
   Young, C. C.
   Burchat, P. R.
   Edwards, A. J.
   Majewski, S. A.
   Petersen, B. A.
   Roat, C.
   Wilden, L.
   Ahmed, S.
   Alam, M. S.
   Bula, R.
   Ernst, J. A.
   Jain, V.
   Pan, B.
   Saeed, M. A.
   Wappler, F. R.
   Zain, S. B.
   Bugg, W.
   Krishnamurthy, M.
   Spanier, S. M.
   Eckmann, R.
   Ritchie, J. L.
   Satpathy, A.
   Schilling, C. J.
   Schwitters, R. F.
   Izen, J. M.
   Kitayama, I.
   Lou, X. C.
   Ye, S.
   Bianchi, F.
   Gallo, F.
   Gamba, D.
   Bomben, M.
   Bosisio, L.
   Cartaro, C.
   Cossutti, F.
   Della Ricca, G.
   Dittongo, S.
   Grancagnolo, S.
   Lanceri, L.
   Vitale, L.
   Azzolini, V.
   Martinez-Vidal, F.
   Banerjee, Sw.
   Bhuyan, B.
   Brown, C. M.
   Fortin, D.
   Hamano, K.
   Kowalewski, R.
   Nugent, I. M.
   Roney, J. M.
   Sobie, R. J.
   Back, J. J.
   Harrison, P. F.
   Latham, T. E.
   Mohanty, G. B.
   Pappagallo, M.
   Band, H. R.
   Chen, X.
   Cheng, B.
   Dasu, S.
   Datta, M.
   Eichenbaum, A. M.
   Flood, K. T.
   Hollar, J. J.
   Kutter, P. E.
   Li, H.
   Liu, R.
   Mellado, B.
   Mihalyi, A.
   Mohapatra, A. K.
   Pan, Y.
   Pierini, M.
   Prepost, R.
   Tan, P.
   Wu, S. L.
   Yu, Z.
   Neal, H.
CA BaBar Collaboration
TI Observation of decays B-0 -> D-s((*)+)pi(-) and B-0 -> Ds(*)-K+
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB We report the observation of decays B-0 -> D-s((*)+)pi(-) and B-0 -> Ds(*)-K+ in a sample of 230x10(6) Upsilon(4S)-> BB events recorded with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)e(-) storage ring. We measure the branching fractions B(B-0 -> D-s(+)pi(-))=(1.3 +/- 0.3(stat)+/- 0.2(syst))x10(-5), B(B-0 -> Ds-K+)=(2.5 +/- 0.4(stat)+/- 0.4(syst))x10(-5), B(B-0 -> D-s(*+)pi(-))=(2.8 +/- 0.6(stat)+/- 0.5(syst))x10(-5), and B(B-0 -> Ds*-K+)=(2.0 +/- 0.5(stat)+/- 0.4(syst))x10(-5). The significances of the measurements to differ from zero are 5, 9, 6, and 5 standard deviations, respectively. This is the first observation of B-0 -> D-s(+)pi(-), B-0 -> D-s(*+)pi(-), and B-0 -> Ds*-K+ decays.
C1 Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
   Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain.
   Univ Bari, Dipartmento Fis, I-70126 Bari, Italy.
   Ist Nazl Fis Nucl, I-70126 Bari, Italy.
   Inst High Energy Phys, Beijing 100039, Peoples R China.
   Univ Bergen, Inst Phys, N-5007 Bergen, Norway.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Berkeley, CA 94720 USA.
   Univ Birmingham, Birmingham B15 2TT, W Midlands, England.
   Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany.
   Univ Bristol, Bristol BS8 1TL, Avon, England.
   Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
   Brunel Univ, Uxbridge UB8 3PH, Middx, England.
   Budker Inst Nucl Phys, Novosibirsk 630090, Russia.
   Univ Calif Irvine, Irvine, CA 92697 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   Univ Calif Riverside, Riverside, CA 92521 USA.
   Univ Calif San Diego, La Jolla, CA 92093 USA.
   Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA.
   CALTECH, Pasadena, CA 91125 USA.
   Univ Cincinnati, Cincinnati, OH 45221 USA.
   Univ Colorado, Boulder, CO 80309 USA.
   Colorado State Univ, Ft Collins, CO 80523 USA.
   Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany.
   Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany.
   Ecole Polytech, LLR, F-91128 Palaiseau, France.
   Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy.
   Ist Nazl Fis Nucl, I-44100 Ferrara, Italy.
   Lab Nazl Frascati, INFN, I-00044 Frascati, Italy.
   Univ Genoa, Dept Phys, I-16146 Genoa, Italy.
   Ist Nazl Fis Nucl, I-16146 Genoa, Italy.
   Harvard Univ, Cambridge, MA 02138 USA.
   Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany.
   Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England.
   Univ Iowa, Iowa City, IA 52242 USA.
   Iowa State Univ, Ames, IA 50011 USA.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany.
   CNRS, IN2P3, Lab Accelerateur Lineaire, F-91898 Orsay, France.
   Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   Queen Mary Univ London, London E1 4NS, England.
   Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England.
   Univ Louisville, Louisville, KY 40292 USA.
   Univ Manchester, Manchester M13 9PL, Lancs, England.
   Univ Maryland, College Pk, MD 20742 USA.
   Univ Massachusetts, Amherst, MA 01003 USA.
   MIT, Nucl Sci Lab, Cambridge, MA 02139 USA.
   McGill Univ, Montreal, PQ H3A 2T8, Canada.
   Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
   Ist Nazl Fis Nucl, I-20133 Milan, Italy.
   Univ Mississippi, University, MS 38677 USA.
   Univ Montreal, Phys Particules, Montreal, PQ H3C 3J7, Canada.
   Mt Holyoke Coll, S Hadley, MA 01075 USA.
   Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy.
   Ist Nazl Fis Nucl, I-80126 Naples, Italy.
   Natl Inst Nucl & High Energy Phys, NL-1009 DB Amsterdam, Netherlands.
   Univ Notre Dame, Notre Dame, IN 46556 USA.
   Ohio State Univ, Columbus, OH 43210 USA.
   Univ Oregon, Eugene, OR 97403 USA.
   Univ Padua, Dipartimento Fis, I-35131 Padua, Italy.
   Ist Nazl Fis Nucl, I-35131 Padua, Italy.
   Univ Paris 06, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
   Univ Paris 07, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France.
   Univ Penn, Philadelphia, PA 19104 USA.
   Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   Ist Nazl Fis Nucl, I-06100 Perugia, Italy.
   Univ Pisa, Dipartimento Fis, Scuola Normale Super, I-56127 Pisa, Italy.
   Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
   Prairie View A&M Univ, Prairie View, TX 77446 USA.
   Princeton Univ, Princeton, NJ 08544 USA.
   Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.
   Ist Nazl Fis Nucl, I-00185 Rome, Italy.
   Univ Rostock, D-18051 Rostock, Germany.
   Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England.
   CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France.
   Univ S Carolina, Columbia, SC 29208 USA.
   Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA.
   Stanford Univ, Stanford, CA 94305 USA.
   SUNY Albany, Albany, NY 12222 USA.
   Univ Tennessee, Knoxville, TN 37996 USA.
   Univ Texas, Austin, TX 78712 USA.
   Univ Texas, Richardson, TX 75083 USA.
   Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy.
   Ist Nazl Fis Nucl, I-10125 Turin, Italy.
   Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
   Ist Nazl Fis Nucl, I-34127 Trieste, Italy.
   Univ Valencia, IFIC, CSIC, E-46071 Valencia, Spain.
   Univ Victoria, Victoria, BC V8W 3P6, Canada.
   Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06511 USA.
   Lab Phys Corpusculaire, Clermont Ferrand, France.
   Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy.
   Univ Basilicata, I-85100 Potenza, Italy.
RP Aubert, B (reprint author), Lab Annecy Le Vieux Phys Particules, F-74941 Annecy Le Vieux, France.
RI dong, liaoyuan/A-5093-2015; Rizzo, Giuliana/A-8516-2015; Negrini,
   Matteo/C-8906-2014; Peters, Klaus/C-2728-2008; de Groot,
   Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009;
   Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Forti,
   Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani,
   Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Cavallo,
   Nicola/F-8913-2012; Saeed, Mohammad Alam/J-7455-2012; Della Ricca,
   Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo,
   Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey,
   Raymond/E-2830-2016; Monge, Maria Roberta/G-9127-2012; Oyanguren,
   Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; Calabrese,
   Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal,
   F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere,
   Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani,
   Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani,
   Alberto/A-3329-2016
OI dong, liaoyuan/0000-0002-4773-5050; Pacetti, Simone/0000-0002-6385-3508;
   Galeazzi, Fulvio/0000-0002-6830-9982; Covarelli,
   Roberto/0000-0003-1216-5235; Rizzo, Giuliana/0000-0003-1788-2866;
   Paoloni, Eugenio/0000-0001-5969-8712; Faccini,
   Riccardo/0000-0003-2613-5141; Raven, Gerhard/0000-0002-2897-5323;
   Negrini, Matteo/0000-0003-0101-6963; Peters, Klaus/0000-0001-7133-0662;
   Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756;
   Forti, Francesco/0000-0001-6535-7965; Rotondo,
   Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747;
   de Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad
   Alam/0000-0002-3529-9255; Della Ricca, Giuseppe/0000-0003-2831-6982; Di
   Lodovico, Francesca/0000-0003-3952-2175; Pappagallo,
   Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826;
   Frey, Raymond/0000-0003-0341-2636; Egede, Ulrik/0000-0001-5493-0762;
   Bettarini, Stefano/0000-0001-7742-2998; Cibinetto,
   Gianluigi/0000-0002-3491-6231; Monge, Maria Roberta/0000-0003-1633-3195;
   Oyanguren, Arantza/0000-0002-8240-7300; Luppi,
   Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400;
   Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal,
   F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere,
   Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304;
   Lusiani, Alberto/0000-0002-6876-3288; Morandin,
   Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288
NR 21
TC 13
Z9 13
U1 0
U2 5
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 081801
DI 10.1103/PhysRevLett.98.081801
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700015
ER

PT J
AU Byelikov, A
   Adachi, T
   Fujita, H
   Fujita, K
   Fujita, Y
   Hatanaka, K
   Heger, A
   Kalmykov, Y
   Kawase, K
   Langanke, K
   Martinez-Pinedo, G
   Nakanishi, K
   von Neumann-Cosel, P
   Neveling, R
   Richter, A
   Sakamoto, N
   Sakemi, Y
   Shevchenko, A
   Shimbara, Y
   Shimizu, Y
   Smit, FD
   Tameshige, Y
   Tamii, A
   Woosley, SE
   Yosoi, M
AF Byelikov, A.
   Adachi, T.
   Fujita, H.
   Fujita, K.
   Fujita, Y.
   Hatanaka, K.
   Heger, A.
   Kalmykov, Y.
   Kawase, K.
   Langanke, K.
   Martinez-Pinedo, G.
   Nakanishi, K.
   von Neumann-Cosel, P.
   Neveling, R.
   Richter, A.
   Sakamoto, N.
   Sakemi, Y.
   Shevchenko, A.
   Shimbara, Y.
   Shimizu, Y.
   Smit, F. D.
   Tameshige, Y.
   Tamii, A.
   Woosley, S. E.
   Yosoi, M.
TI Gamow-Teller strength in the exotic odd-odd nuclei La-138 and Ta-180 and
   its relevance for neutrino nucleosynthesis
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID R-PROCESS; SPALLATION
AB The Gamow-Teller strength distributions below the particle threshold in La-138 and Ta-180, deduced from high-resolution measurements of the (He-3,t) reaction at 0 degrees, allow us to evaluate the role of charged-current reactions for the production of these extremely rare nuclides in neutrino-nucleosynthesis models. The analysis suggests that essentially all La-138 in the Universe can be made that way. Neutrino nucleosynthesis also contributes significantly to the abundance of Ta-180 but the magnitude depends on the unknown branching ratio for population of the long-lived isomer.
C1 Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
   Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan.
   Univ Witwatersrand, Sch Phys, ZA-2050 Wits, South Africa.
   iThemba LABS, ZA-7129 Somerset W, South Africa.
   Osaka Univ, Res Ctr Nucl Phys, Ibaraki, Osaka 5670047, Japan.
   Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA.
   Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
   Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany.
RP Byelikov, A (reprint author), Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
EM vnc@ikp.tu-darmstadt.de
RI Martinez-Pinedo, Gabriel/A-1915-2013
OI Martinez-Pinedo, Gabriel/0000-0002-3825-0131
NR 26
TC 43
Z9 43
U1 0
U2 3
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 082501
DI 10.1103/PhysRevLett.98.082501
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700021
PM 17359091
ER

PT J
AU Connaughton, C
   Rajesh, R
   Zaboronski, O
AF Connaughton, Colm
   Rajesh, R.
   Zaboronski, Oleg
TI Constant flux relation for driven dissipative systems
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FORCE FLUCTUATIONS; WAVE TURBULENCE; TAKAYASU MODEL; SCALING LAWS; BEAD
   PACKS
AB Conservation laws constrain the stationary state statistics of driven dissipative systems because the average flux of a conserved quantity between driving and dissipation scales should be constant. This requirement leads to a universal scaling law for flux-measuring correlation functions, which generalizes the 4/5th law of Navier-Stokes turbulence. We demonstrate the utility of this simple idea by deriving new exact scaling relations for models of aggregating particle systems in the fluctuation-dominated regime and for energy and wave action cascades in models of strong wave turbulence.
C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   Inst Math Sci, Madras 600013, Tamil Nadu, India.
   Univ Warwick, Inst Math, Coventry CV4 7AL, W Midlands, England.
RP Connaughton, C (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, POB 1663, Los Alamos, NM 87545 USA.
RI Connaughton, Colm/E-8796-2011; 
OI Connaughton, Colm/0000-0003-4137-7050; Zaboronski,
   Oleg/0000-0001-7530-6643
NR 21
TC 8
Z9 8
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 080601
DI 10.1103/PhysRevLett.98.080601
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700010
PM 17359080
ER

PT J
AU Correa, VF
   Murphy, TP
   Martin, C
   Purcell, KM
   Palm, EC
   Schmiedeshoff, GM
   Cooley, JC
   Tozer, SW
AF Correa, V. F.
   Murphy, T. P.
   Martin, C.
   Purcell, K. M.
   Palm, E. C.
   Schmiedeshoff, G. M.
   Cooley, J. C.
   Tozer, S. W.
TI Magnetic-field-induced lattice anomaly inside the superconducting state
   of CeCoIn5: Anisotropic evidence of the possible
   Fulde-Ferrell-Larkin-Ovchinnikov state
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HEAVY-FERMION SUPERCONDUCTOR; UNCONVENTIONAL SUPERCONDUCTIVITY; PAULI
   PARAMAGNETISM; CEIRIN5
AB We report high magnetic field linear magnetostriction experiments on CeCoIn5 single crystals. Two features are remarkable: (i) a sharp discontinuity in all the crystallographic axes associated with the upper superconducting critical field B-c2 that becomes less pronounced as the temperature increases and (ii) a distinctive second orderlike feature observed only along the c axis in the high field (10 T less than or similar to B <= B-c2) low temperature (T less than or similar to 0.35 K) region. This second order transition is observed only when the magnetic field lies within 20 degrees of the ab planes and there is no signature of it above B-c2, which raises questions regarding its interpretation as a field induced magnetically ordered phase. Good agreement with previous results suggests that this anomaly is related to the transition to a possible Fulde-Ferrel-Larkin-Ovchinnikov superconducting state.
C1 Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
   Florida State Univ, Dept Phys, Tallahassee, FL 32310 USA.
   Occidental Coll, Los Angeles, CA 90041 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Correa, VF (reprint author), Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA.
RI Cooley, Jason/E-4163-2013
NR 37
TC 43
Z9 43
U1 4
U2 12
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 087001
DI 10.1103/PhysRevLett.98.087001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700048
PM 17359118
ER

PT J
AU Cragg, GE
   Kerman, AK
AF Cragg, George E.
   Kerman, Arthur K.
TI Coherent decay of Bose-Einstein condensates
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID 3-BODY RECOMBINATION; ATOMS; HYDROGEN; GAS
AB Atomic Bose-Einstein condensates are singular forms of matter with the coherence between constituent atoms as a defining characteristic. Although this viewpoint is increasingly validated through experimental findings, the mechanisms behind the observed losses are still understood with classical recombinant collision arguments between particles within the condensate itself. By incorporating a general interparticle interaction into the Hamiltonian, a coherent decay rate can be obtained, thus providing a direct link between the observed losses and the microscopic two-body parameters. Appearing in the lifetime, the interaction strength, lambda, is expressed as lambda=8 pi a/(1-delta), where the small parameter delta is obtained from a fit to experimental loss data. Most importantly, the lowest order rate exhibits a novel density dependence (rho(3/2)) that can be identified in low temperature tests.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   MIT, Nucl Sci Lab, Ctr Theoret Phys, Cambridge, MA 02139 USA.
   MIT, Dept Phys, Cambridge, MA 02139 USA.
RP Cragg, GE (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
NR 22
TC 1
Z9 1
U1 1
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 080405
DI 10.1103/PhysRevLett.98.080405
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700005
PM 17359075
ER

PT J
AU Froula, DH
   Divol, L
   Meezan, NB
   Dixit, S
   Moody, JD
   Neumayer, P
   Pollock, BB
   Ross, JS
   Glenzer, SH
AF Froula, D. H.
   Divol, L.
   Meezan, N. B.
   Dixit, S.
   Moody, J. D.
   Neumayer, P.
   Pollock, B. B.
   Ross, J. S.
   Glenzer, S. H.
TI Ideal laser-beam propagation through high-temperature ignition hohlraum
   plasmas
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SCALE; SCATTERING; FACILITY; TARGETS
AB We demonstrate that a blue (3 omega, 351 nm) laser beam with an intensity of 2x10(15) W cm(-2) propagates nearly within the original beam cone through a millimeter scale, T-e=3.5 keV high density (n(e)=5x10(20) cm(-3)) plasma. The beam produced less than 1% total backscatter at these high temperatures and densities; the resulting transmission is greater than 90%. Scaling of the electron temperature in the plasma shows that the plasma becomes transparent for uniform electron temperatures above 3 keV. These results are consistent with linear theory thresholds for both filamentation and backscatter instabilities inferred from detailed hydrodynamic simulations. This provides a strong justification for current inertial confinement fusion designs to remain below these thresholds.
C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
RP Froula, DH (reprint author), Lawrence Livermore Natl Lab, POB 808,L-399, Livermore, CA 94551 USA.
EM froula1@llnl.gov
NR 21
TC 34
Z9 34
U1 2
U2 2
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 085001
DI 10.1103/PhysRevLett.98.085001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700034
ER

PT J
AU Oz, E
   Deng, S
   Katsouleas, T
   Muggli, P
   Barnes, CD
   Blumenfeld, I
   Decker, FJ
   Emma, P
   Hogan, MJ
   Ischebeck, R
   Iverson, RH
   Kirby, N
   Krejcik, P
   O'Connell, C
   Siemann, RH
   Walz, D
   Auerbach, D
   Clayton, CE
   Huang, C
   Johnson, DK
   Joshi, C
   Lu, W
   Marsh, KA
   Mori, WB
   Zhou, M
AF Oz, E.
   Deng, S.
   Katsouleas, T.
   Muggli, P.
   Barnes, C. D.
   Blumenfeld, I.
   Decker, F. J.
   Emma, P.
   Hogan, M. J.
   Ischebeck, R.
   Iverson, R. H.
   Kirby, N.
   Krejcik, P.
   O'Connell, C.
   Siemann, R. H.
   Walz, D.
   Auerbach, D.
   Clayton, C. E.
   Huang, C.
   Johnson, D. K.
   Joshi, C.
   Lu, W.
   Marsh, K. A.
   Mori, W. B.
   Zhou, M.
TI Ionization-induced electron trapping in ultrarelativistic plasma wakes
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID WAVE-BREAKING; OSCILLATIONS; ACCELERATION; PULSES
AB The onset of trapping of electrons born inside a highly relativistic, 3D beam-driven plasma wake is investigated. Trapping occurs in the transition regions of a Li plasma confined by He gas. Li plasma electrons support the wake, and higher ionization potential He atoms are ionized as the beam is focused by Li ions and can be trapped. As the wake amplitude is increased, the onset of trapping is observed. Some electrons gain up to 7.6 GeV in a 30.5 cm plasma. The experimentally inferred trapping threshold is at a wake amplitude of 36 GV/m, in good agreement with an analytical model and PIC simulations.
C1 Univ So Calif, Dept Electrophys & Elect Engn, Los Angeles, CA 90089 USA.
   Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA.
RP Oz, E (reprint author), Univ So Calif, Dept Electrophys & Elect Engn, Los Angeles, CA 90089 USA.
RI Lu, Wei/F-2504-2016
NR 20
TC 71
Z9 71
U1 3
U2 13
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 084801
DI 10.1103/PhysRevLett.98.084801
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700033
PM 17359103
ER

PT J
AU Simmons, JM
   In, I
   Campbell, VE
   Mark, TJ
   Leonard, F
   Gopalan, P
   Eriksson, MA
AF Simmons, J. M.
   In, I.
   Campbell, V. E.
   Mark, T. J.
   Leonard, F.
   Gopalan, P.
   Eriksson, M. A.
TI Optically modulated conduction in chromophore-functionalized single-wall
   carbon nanotubes
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FIELD-EFFECT TRANSISTORS; EMISSION; EXCITONS; DEVICES
AB We demonstrate an optically active nanotube-hybrid material by functionalizing single-wall nanotubes with an azo-based chromophore. Upon UV illumination, the conjugated chromophore undergoes a cis-trans isomerization leading to a charge redistribution near the nanotube. This charge redistribution changes the local electrostatic environment, shifting the threshold voltage and increasing the conductivity of the nanotube transistor. For a similar to 1%-2% coverage, we measure a shift in the threshold voltage of up to 1.2 V. Further, the conductance change is reversible and repeatable over long periods of time, indicating that the chromophore-functionalized nanotubes are useful for integrated nanophotodetectors.
C1 Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
   Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA.
   Sandia Natl Labs, Livermore, CA 94551 USA.
RP Simmons, JM (reprint author), Univ Wisconsin, Dept Phys, Madison, WI 53706 USA.
NR 22
TC 74
Z9 75
U1 1
U2 18
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 086802
DI 10.1103/PhysRevLett.98.086802
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700047
PM 17359117
ER

PT J
AU Stein, GE
   Kramer, EJ
   Li, X
   Wang, J
AF Stein, G. E.
   Kramer, E. J.
   Li, X.
   Wang, J.
TI Single-crystal diffraction from two-dimensional block copolymer arrays
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID X-RAY-SCATTERING; MONOLAYER XENON; 2 DIMENSIONS; CUBIC PHASES;
   THIN-FILMS; GRAPHITE; MELTS; SYSTEMS; LATTICE
AB The structure of oriented 2D block copolymer single crystals is characterized by grazing-incidence small-angle x-ray diffraction, demonstrating long-range sixfold orientational order. From line shape analysis of the higher-order Bragg diffraction peaks, we determine that translational order decays algebraically with a decay exponent eta=0.2, consistent with the Kosterlitz-Thouless-Halperin-Nelson-Young theory for a 2D crystal with a shear modulus mu=2x10(-4) N/m.
C1 Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA.
   Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
RP Stein, GE (reprint author), Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA.
EM edkramer@mrl.ucsb.edu
RI Stein, Gila/P-1927-2016
OI Stein, Gila/0000-0002-3973-4496
NR 30
TC 39
Z9 39
U1 1
U2 21
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 086101
DI 10.1103/PhysRevLett.98.086101
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700043
PM 17359113
ER

PT J
AU Wiederrecht, GP
   Hall, JE
   Bouhelier, A
AF Wiederrecht, Gary P.
   Hall, Jeffrey E.
   Bouhelier, Alexandre
TI Control of molecular energy redistribution pathways via surface plasmon
   gating
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FLUORESCENCE; ABSORPTION; BACTERIORHODOPSIN; SPECTROSCOPIES; STATE;
   FILMS
AB Strong coupling of molecular electronic states with tunable surface plasmon resonances is used to control electronic energy redistribution pathways in molecules adsorbed on a silver film. Ultrafast excitation of porphyrinic molecular J aggregates into the S-2 state is followed by a second pulse of varying incident wave vector to produce a tunable plasmon in the film. When the plasmon overlaps the S-1 state, energy flows from S-2 to S-1 at high efficiency. If the plasmon hybridizes with the S-2 state, the excitation remains in the S-2 vibrational manifold during quenching to the ground state. These results could have significant impact on the design of active molecular devices.
C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
   CNRS, UMR 5209, Inst Carnot Bourgogne, Dept Nanosci, Dijon, France.
RP Wiederrecht, GP (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA.
RI Bouhelier, Alexandre/A-1960-2010
NR 30
TC 45
Z9 45
U1 1
U2 25
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 23
PY 2007
VL 98
IS 8
AR 083001
DI 10.1103/PhysRevLett.98.083001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 139GQ
UT WOS:000244420700022
PM 17359092
ER

PT J
AU von Mering, C
   Hugenholtz, P
   Raes, J
   Tringe, SG
   Doerks, T
   Jensen, LJ
   Ward, N
   Bork, P
AF von Mering, C.
   Hugenholtz, P.
   Raes, J.
   Tringe, S. G.
   Doerks, T.
   Jensen, L. J.
   Ward, N.
   Bork, P.
TI Quantitative phylogenetic assessment of microbial communities in diverse
   environments
SO SCIENCE
LA English
DT Article
ID BACTERIAL DIVERSITY; DNA EXTRACTION; SARGASSO SEA; EVOLUTION;
   MICROORGANISMS; SAMPLES; RECONSTRUCTION; METAGENOMICS; PROKARYOTE;
   MAJORITY
AB The taxonomic composition of environmental communities is an important indicator of their ecology and function. We used a set of protein-coding marker genes, extracted from large-scale environmental shotgun sequencing data, to provide a more direct, quantitative, and accurate picture of community composition than that provided by traditional ribosomal RNA-based approaches depending on the polymerase chain reaction. Mapping marker genes from four diverse environmental data sets onto a reference species phylogeny shows that certain communities evolve faster than others. The method also enables determination of preferred habitats for entire microbial clades and provides evidence that such habitat preferences are often remarkably stable over time.
C1 European Mol Biol Lab, D-69117 Heidelberg, Germany.
   DOE Joint Genome Inst, Walnut Creek, CA 94598 USA.
   Inst Genom Res, Rockville, MD 20850 USA.
RP Bork, P (reprint author), European Mol Biol Lab, Meyerhofstr 1, D-69117 Heidelberg, Germany.
EM peer.bork@embl.de
RI von Mering, Christian/B-3300-2008; Hugenholtz, Philip/G-9608-2011; Bork,
   Peer/F-1813-2013; 
OI von Mering, Christian/0000-0001-7734-9102; Bork,
   Peer/0000-0002-2627-833X; hugenholtz, philip/0000-0001-5386-7925;
   Jensen, Lars Juhl/0000-0001-7885-715X
NR 33
TC 180
Z9 183
U1 3
U2 67
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD FEB 23
PY 2007
VL 315
IS 5815
BP 1126
EP 1130
DI 10.1126/science.1133420
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 138UA
UT WOS:000244387600037
PM 17272687
ER

PT J
AU Cournia, Z
   Ullmann, GM
   Smith, JC
AF Cournia, Zoe
   Ullmann, G. Matthias
   Smith, Jeremy C.
TI Differential effects of cholesterol, ergosterol and lanosterol on a
   dipalmitoyl phosphatidylcholine membrane: A molecular dynamics
   simulation study
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Review
ID STEROL STRUCTURE DETERMINES; NUCLEAR-MAGNETIC-RESONANCE;
   LIPID-BILAYER-MEMBRANE; COMBINED MONTE-CARLO; SURFACE-TENSION;
   CONSTANT-PRESSURE; PHOSPHOLIPID-BILAYERS; COMPUTER-SIMULATION; CONDENSED
   COMPLEXES; LATERAL DIFFUSION
AB Lipid raft/domain formation may arise as a result of the effects of specific sterols on the physical properties of membranes. Here, using molecular dynamics simulation, we examine the effects of three closely-related sterols, ergosterol, cholesterol, and lanosterol, at a biologically relevant concentration (40 mol %) on the structural properties of a model dipalmitoyl phosphatidylcholine (DPPC) membrane at 309 and 323 K. All three sterols are found to order the DPPC acyl tails and condense the membrane relative to the DPPC liquid-phase membrane, but each one does this to a significantly different degree. The smooth alpha-face of ergosterol, together with the presence of tail unsaturation in this sterol, leads to closer interaction of ergosterol with the lipids and closer packing of the lipids with each other, so ergosterol has a higher condensing effect on the membrane, as reflected by the area per lipid. Moreover, ergosterol induces a higher proportion of trans lipid conformers, a thicker membrane, and higher lipid order parameters and is aligned more closely with the membrane normal. Ergosterol also positions itself closer to the bilayer/water interface. In contrast, the rough alpha-face of lanosterol leads to a less close interaction of the steroid ring system with the phospholipid acyl chains, and so lanosterol orders, straightens, and packs the lipid acyl chains less well and is less closely aligned with the membrane normal. Furthermore, lanosterol lies closer to the relatively disordered membrane center than do the other sterols. The behavior of cholesterol in all the above respects is intermediate between that of lanosterol and ergosterol. The findings here may explain why ergosterol is the most efficient of the three sterols at promoting the liquid-ordered phase and lipid domain formation and may also furnish part of the explanation as to why cholesterol is evolutionarily preferred over lanosterol in higher-vertebrate plasma membranes.
C1 Univ Heidelberg, Interdisciplinary Ctr Sci Comp IWR, D-69120 Heidelberg, Germany.
   Univ Bayreuth, D-95447 Bayreuth, Germany.
   Univ Tennessee, Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Ctr Biophys Mol, Oak Ridge, TN 37831 USA.
RP Smith, JC (reprint author), Univ Heidelberg, Interdisciplinary Ctr Sci Comp IWR, Neuenheimer Feld 368, D-69120 Heidelberg, Germany.
EM biocomputing@iwr.uni-heidelberg.de
RI smith, jeremy/B-7287-2012; Ullmann, Matthias/H-1361-2014; 
OI smith, jeremy/0000-0002-2978-3227; Ullmann,
   Matthias/0000-0002-6350-798X; Cournia, Zoe/0000-0001-9287-364X
NR 118
TC 70
Z9 72
U1 1
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD FEB 22
PY 2007
VL 111
IS 7
BP 1786
EP 1801
DI 10.1021/jp065172i
PG 16
WC Chemistry, Physical
SC Chemistry
GA 136LT
UT WOS:000244225100039
PM 17261058
ER

PT J
AU Roe, DR
   Okur, A
   Wickstrom, L
   Hornak, V
   Simmerling, C
AF Roe, Daniel R.
   Okur, Asim
   Wickstrom, Lauren
   Hornak, Viktor
   Simmerling, Carlos
TI Secondary structure bias in generalized born solvent models: Comparison
   of conformational ensembles and free energy of solvent polarization from
   explicit and implicit solvation
SO JOURNAL OF PHYSICAL CHEMISTRY B
LA English
DT Article
ID POISSON-BOLTZMANN CALCULATIONS; EXCHANGE MOLECULAR-DYNAMICS;
   ALPHA-HELICAL PEPTIDES; POLYPROLINE II HELIX; PROTEIN SURFACE;
   BETA-HAIRPIN; RADII; WATER; SIMULATIONS; APPROXIMATION
AB The effects of the use of three generalized Born (GB) implicit solvent models on the thermodynamics of a simple polyalanine peptide are studied via comparing several hundred nanoseconds of well-converged replica exchange molecular dynamics (REMD) simulations using explicit TIP3P solvent to REMD simulations with the GB solvent models. It is found that when compared to REMD simulations using TIP3P the GB REMD simulations contain significant differences in secondary structure populations, most notably an overabundance of alpha-helical secondary structure. This discrepancy is explored via comparison of the differences in the electrostatic component of the free energy of solvation (Delta Delta G(pol)) between TIP3P (via thermodynamic Integration calculations), the GB models, and an implicit solvent model based on the Poisson equation (PE). The electrostatic components of the solvation free energies are calculated using each solvent model for four representative conformations of Ala10. Since the PE model is found to have the best performance with respect to reproducing TIP3P Delta Delta G(pol) values, effective Born radii from the GB models are compared to effective Born radii calculated with PE (so-called perfect radii), and significant and numerous deviations in GB radii from perfect radii are found in all GB models. The effect of these deviations on the solvation free energy is discussed, and it is shown that even when perfect radii are used the agreement of GB with TIP3P Delta Delta G(pol) values does not improve. This suggests a limit to the optimization of the effective Born radius calculation and that future efforts to improve the accuracy of GB models must extend beyond such optimizations.
C1 SUNY Stony Brook, Dept Chem, Grad Program Biochem & Struct Biol, Stony Brook, NY 11794 USA.
   SUNY Stony Brook, Ctr Struct Biol, Stony Brook, NY 11794 USA.
   Brookhaven Natl Lab, Ctr Comp Sci, Upton, NY 11973 USA.
RP Simmerling, C (reprint author), SUNY Stony Brook, Dept Chem, Grad Program Biochem & Struct Biol, Stony Brook, NY 11794 USA.
EM carlos.simmerling@stonybrook.edu
FU NIGMS NIH HHS [GM6167803, R01 GM061678, R01 GM061678-07]
NR 51
TC 74
Z9 74
U1 3
U2 17
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1520-6106
J9 J PHYS CHEM B
JI J. Phys. Chem. B
PD FEB 22
PY 2007
VL 111
IS 7
BP 1846
EP 1857
DI 10.1021/jp066831u
PG 12
WC Chemistry, Physical
SC Chemistry
GA 136LT
UT WOS:000244225100045
PM 17256983
ER

PT J
AU Zhang, ZR
   Bondarchuk, E
   Kay, BD
   White, JM
   Dohnalek, Z
AF Zhang, Zhenrong
   Bondarchuk, Oleksandr
   Kay, Bruce D.
   White, J. M.
   Dohnalek, Zdenck
TI Direct visualization of 2-butanol adsorption and dissociation on
   TiO2(110)
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID SCANNING-TUNNELING-MICROSCOPY; ALIPHATIC-ALCOHOLS; SURFACE; TIO2;
   DECOMPOSITION; DEHYDRATION; METHANOL; OXYGEN; WATER; PHOTOCATALYSIS
AB High-resolution scanning tunneling microscopy (STM) images of identical regions of a TiO2(010) surface were gathered before and after controlled doses of 2-butanol (CH3CH2CH(OH)CH3) at ambient temperature (similar to 300 K). When dosing is initiated, 2-butanol preferentially adsorbs at bridge-bonded oxygen vacancy (BBOV) sites and dissociates via O-H, not C-O, bond scission to form paired 2-butoxy and hydroxyl species evidenced by two local maxima in STM line profiles. As the dose increases, but before all the BBOV's are occupied, there is direct STM evidence of hydrogen hopping of the hydroxyl to an adjacent oxygen anion row. This process is facilitated by species bound to 5-coordinate Ti4+ rows, presumably undissociated 2-butanol, that hop slowly on the STM imaging time scale. The carbon backbones of these mobile species are centered over the Ti4+ rows with a preference for lying parallel to these rows. On the other hand, the carbon backbones of the 2-butoxy species that fill BBOV's are centered over the O2- rows and prefer an orientation perpendicular to these rows. As the oxygen vacancy concentration increases from 0.4 to 11% and 2-butanol is dosed, the ratio of mobile Ti4+-bound 2-butanol to stationary BBOV-bound 2-butoxy species decreases for doses that do not fill all the BBOV's.
C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA.
   Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
   Univ Texas, Dept Chem & Biochem, Ctr Mat Chem, Austin, TX 78712 USA.
RP White, JM (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA.
EM JMWhite@mail.utexas.edu; Zdenek.Dohnalek@pni.gov
OI Zhang, Zhenrong/0000-0003-3969-2326; Dohnalek,
   Zdenek/0000-0002-5999-7867; Bondarchuk, Oleksandr/0000-0001-7380-8930
NR 22
TC 47
Z9 47
U1 2
U2 21
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 22
PY 2007
VL 111
IS 7
BP 3021
EP 3027
DI 10.1021/jp067461c
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 147LZ
UT WOS:000245005800028
ER

PT J
AU Predota, M
   Cummings, PT
   Wesolowski, DJ
AF Predota, M.
   Cummings, P. T.
   Wesolowski, D. J.
TI Electric double layer at the rutile (110) surface. 3. Inhomogeneous
   viscosity and diffusivity measurement by computer simulations
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; SELF-DIFFUSION; ELECTROOSMOTIC FLOW;
   WATER INTERFACE; POISEUILLE FLOW; ADSORPTION; MODEL; POTENTIALS; FLUIDS
AB Molecular dynamics simulations were conducted to characterize the dynamic properties of the interface between aqueous electrolyte and the (110) surface of rutile (alpha-TiO2). For the first time, the inhomogeneous viscosity of water (at liquid density) in a slab formed by two rutile surfaces was determined computation ally. The viscosity and diffusivity profiles show three different regions as a function of distance from the surface: (i) a region of two adsorbed layers of water molecules with apparently infinite viscosity and zero diffusivity, (ii) an interfacial inhomogeneous region consisting of additional 2-3 layers, and (iii) bulk-liquid behavior recovered as close as 15 angstrom from the surface. The second layer of adsorbed water molecules becomes more loosely bound to the surface with increasing temperature up to 523 K. Our results supplement our previous structural findings and confirm that not only the structural but also the dynamic properties of the interface indicate that bulk properties are recovered within about 15-20 angstrom angstrom from the surface.
C1 Univ S Bohemia, Dept Med Phys & Biophys, Ceske Budejovice 37004, Czech Republic.
   Acad Sci Czech Republic, Inst Chem Proc Fundamentals, CR-16502 Prague, Czech Republic.
   Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA.
   Oak Ridge Natl Lab, Div Chem Sci, Aqueous Chem & Geochem Grp, Oak Ridge, TN 37831 USA.
RP Predota, M (reprint author), Univ S Bohemia, Dept Med Phys & Biophys, Jirovcova 24, Ceske Budejovice 37004, Czech Republic.
RI Predota, Milan/A-2256-2009; Cummings, Peter/B-8762-2013
OI Predota, Milan/0000-0003-3902-0992; Cummings, Peter/0000-0002-9766-2216
NR 34
TC 39
Z9 40
U1 3
U2 22
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 22
PY 2007
VL 111
IS 7
BP 3071
EP 3079
DI 10.1021/jp065165u
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 147LZ
UT WOS:000245005800035
ER

PT J
AU Chowell, G
   Nishiura, H
   Bettencourt, LMA
AF Chowell, Gerardo
   Nishiura, Hiroshi
   Bettencourt, Luis M. A.
TI Comparative estimation of the reproduction number for pandemic influenza
   from daily case notification data
SO JOURNAL OF THE ROYAL SOCIETY INTERFACE
LA English
DT Article
DE Spanish flu; pandemic; influenza; reproduction number; San Francisco
ID ACUTE RESPIRATORY SYNDROME; TRANSMISSION DYNAMICS; HONG-KONG; EPIDEMICS;
   MODELS; SARS; INFECTION; INTERVENTIONS; HOUSEHOLD; DISEASES
AB The reproduction number, R, defined as the average number of secondary cases generated by a primary case, is a crucial quantity for identifying the intensity of interventions required to control an epidemic. Current estimates of the reproduction number for seasonal influenza show wide variation and, in particular, uncertainty bounds for R for the pandemic strain from 1918 to 1919 have been obtained only in a few recent studies and are yet to be fully clarified. Here, we estimate R using daily case notifications during the autumn wave of the influenza pandemic (Spanish flu) in the city of San Francisco, California, from 1918 to 1919. In order to elucidate the effects from adopting different estimation approaches, four different methods are used: estimation of R using the early exponential-growth rate (Method 1), a simple susceptible exposed - infectious - recovered (SEIR) model (Method 2), a more complex SEIR-type model that accounts for asymptomatic and hospitalized cases ( Method 3), and a stochastic susceptible - infectious - removed (SIR) with Bayesian estimation (Method 4) that determines the effective reproduction number R-t at a given time t. The first three methods. t the initial exponential-growth phase of the epidemic, which was explicitly determined by the goodness-of-fit test. Moreover, Method 3 was also fitted to the whole epidemic curve. Whereas the values of R obtained using the first three methods based on the initial growth phase were estimated to be 2.98 (95% confidence interval (CI): 2.73, 3.25), 2.38 (2.16, 2.60) and 2.20 (1.55, 2.84), the third method with the entire epidemic curve yielded a value of 3.53 (3.45, 3.62). This larger value could be an overestimate since the goodness-of-fit to the initial exponential phase worsened when we fitted the model to the entire epidemic curve, and because the model is established as an autonomous system without time-varying assumptions. These estimates were shown to be robust to parameter uncertainties, but the theoretical exponential-growth approximation (Method 1) shows wide uncertainty. Method 4 provided a maximum-likelihood effective reproduction number 2.10 (1.21, 2.95) using the first 17 epidemic days, which is consistent with estimates obtained from the other methods and an estimate of 2.36 (2.07, 2.65) for the entire autumn wave. We conclude that the reproduction number for pandemic influenza (Spanish flu) at the city level can be robustly assessed to lie in the range of 2.0 3.0, in broad agreement with previous estimates using distinct data.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Univ Tubingen, Dept Med Biometry, D-72070 Tubingen, Germany.
   Nagasaki Univ, Inst Trop Med, Res Ctr Trop Infect Dis, Nagasaki 8528523, Japan.
RP Chowell, G (reprint author), Los Alamos Natl Lab, Div Theoret, MS B284, Los Alamos, NM 87545 USA.
EM chowell@lanl.gov
RI Chowell, Gerardo/A-4397-2008; Chowell, Gerardo/F-5038-2012; 
OI Chowell, Gerardo/0000-0003-2194-2251; Nishiura,
   Hiroshi/0000-0003-0941-8537
NR 53
TC 120
Z9 125
U1 2
U2 15
PU ROYAL SOCIETY
PI LONDON
PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND
SN 1742-5689
J9 J R SOC INTERFACE
JI J. R. Soc. Interface
PD FEB 22
PY 2007
VL 4
IS 12
BP 155
EP 166
DI 10.1098/rsif.2006.0161
PG 12
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 124PS
UT WOS:000243382600018
PM 17254982
ER

PT J
AU Pankewitz, T
   Lagutschenkov, A
   Niedner-Schatteburg, G
   Xantheas, SS
   Lee, YT
AF Pankewitz, Tobias
   Lagutschenkov, Anita
   Niedner-Schatteburg, Gereon
   Xantheas, Sotiris S.
   Lee, Yuan-Tseh
TI Infrared spectrum of NH4+(H2O): Evidence for mode specific fragmentation
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Review
ID VIBRATIONAL PREDISSOCIATION SPECTROSCOPY; STATES INTERPOLATION FUNCTION;
   HIGHER-DERIVATIVE METHODS; AMMONIATED AMMONIUM-IONS; AUXILIARY
   BASIS-SETS; GAUSSIAN-BASIS SETS; GAS-PHASE; CLUSTER IONS; WATER
   CLUSTERS; THERMODYNAMIC FUNCTIONS
AB The gas phase infrared spectrum (3250-3810 cm(-1)) of the singly hydrated ammonium ion, NH4+(H2O), has been recorded by action spectroscopy of mass selected and isolated ions. The four bands obtained are assigned to N-H stretching modes and to O-H stretching modes. The N-H stretching modes observed are blueshifted with respect to the corresponding modes of the free NH4+ ion, whereas a redshift is observed with respect to the modes of the free NH3 molecule. The O-H stretching modes observed are redshifted when compared to the free H2O molecule. The asymmetric stretching modes give rise to rotationally resolved perpendicular transitions. The K-type equidistant rotational spacings of 11.1(2) cm(-1) (NH4+) and 29(3) cm(-1) (H2O) deviate systematically from the corresponding values of the free molecules, a fact which is rationalized in terms of a symmetric top analysis. The relative band intensities recorded compare favorably with predictions of high level ab initio calculations, except on the nu(3)(H2O) band for which the observed value is about 20 times weaker than the calculated one. The nu(3)(H2O)/nu(1)(H2O) intensity ratios from other published action spectra in other cationic complexes vary such that the nu(3)(H2O) intensities become smaller the stronger the complexes are bound. The recorded ratios vary, in particular, among the data collected from action spectra that were recorded with and without rare gas tagging. The calculated anharmonic coupling constants in NH4+(H2O) further suggest that the coupling of the nu(3)(H2O) and nu(1)(H2O) modes to other cluster modes indeed varies by orders of magnitude. These findings together render a picture of a mode specific fragmentation dynamic that modulates band intensities in action spectra with respect to absorption spectra. Additional high level electronic structure calculations at the coupled-cluster singles and doubles with a perturbative treatment of triple excitations [CCSD(T)] level of theory with large basis sets allow for the determination of an accurate binding energy and enthalpy of the NH4+(H2O) cluster. The authors' extrapolated values at the CCSD(T) complete basis set limit are D-e [NH4+-(H2O)]=-85.40(+/- 0.24) kJ/mol and Delta H-(298 K) [NH4+-(H2O)]=-78.3(+/- 0.3) kJ/mol (CC2), in which double standard deviations are indicated in parentheses. (c) 2007 American Institute of Physics.
C1 Univ Kaiserslautern, Fachbereich Chem, D-67663 Kaiserslautern, Germany.
   Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
   Acad Sinica, Inst Atom & Mol Sci, Taipei 106, Taiwan.
RP Pankewitz, T (reprint author), Univ Kaiserslautern, Fachbereich Chem, Erwin Schrodinger Str 52, D-67663 Kaiserslautern, Germany.
EM gns@chemie.uni-kl.de
RI Gung, Amber/D-9842-2011; Niedner-Schatteburg, Gereon/B-8393-2011; Lee,
   Yuan-Tseh/F-7914-2012; Xantheas, Sotiris/L-1239-2015; Rothke,
   Anita/O-5447-2016
OI Niedner-Schatteburg, Gereon/0000-0001-7240-6673; 
NR 107
TC 38
Z9 38
U1 6
U2 36
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 21
PY 2007
VL 126
IS 7
AR 074307
DI 10.1063/1.2435352
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 138VL
UT WOS:000244391300021
PM 17328605
ER

PT J
AU Whitfield, TW
   Martyna, GJ
AF Whitfield, Troy W.
   Martyna, Glenn J.
TI Low variance energy estimators for systems of quantum Drude oscillators:
   Treating harmonic path integrals with large separations of time scales
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MONTE-CARLO SIMULATIONS; MANY-BODY POLARIZATION; MOLECULAR-DYNAMICS;
   DISPERSION; FLUIDS; MODEL; APPROXIMATION; POTENTIALS; ALGORITHMS;
   PROPAGATOR
AB In the effort to develop atomistic models capable of accurately describing nanoscale systems with complex interfaces, it has become clear that simple treatments with rigid charge distributions and dispersion coefficients selected to generate bulk properties are insufficient to predict important physical properties. The quantum Drude oscillator model, a system of one-electron pseudoatoms whose "pseudoelectrons" are harmonically bound to their respective "pseudonuclei," is capable of treating many-body polarization and dispersion interactions in molecular systems on an equal footing due to the ability of the pseudoatoms to mimic the long-range interactions that characterize real materials. Using imaginary time path integration, the Drude oscillator model can, in principle, be solved in computer operation counts that scale linearly with the number of atoms in the system. In practice, however, standard expressions for the energy and pressure, including the commonly used virial estimator, have extremely large variances that require untenably long simulation times to generate converged averages. In this paper, low-variance estimators for the internal energy are derived, in which the large zero-point energy of the oscillators does not contribute to the variance. The new estimators are applicable to any system of harmonic oscillators coupled to one another (or to the environment) via an arbitrary set of anharmonic interactions. The variance of the new estimators is found to be much smaller than standard estimators in three example problems, a one-dimensional anharmonic oscillator and quantum Drude models of the xenon dimer and solid (fcc) xenon, respectively, yielding 2-3 orders of magnitude improvement in computational efficiency. (c) 2007 American Institute of Physics.
C1 IBM Corp, TJ Watson Res Ctr, Yorktown Hts, NY 10598 USA.
RP Whitfield, TW (reprint author), Argonne Natl Lab, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA.
NR 57
TC 10
Z9 10
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD FEB 21
PY 2007
VL 126
IS 7
AR 074104
DI 10.1063/1.2424708
PG 18
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 138VL
UT WOS:000244391300006
PM 17328590
ER

PT J
AU Van Siclen, CD
AF Van Siclen, Clinton DeW
TI Stochastic method for accommodation of equilibrating basins in kinetic
   Monte Carlo simulations
SO JOURNAL OF PHYSICS-CONDENSED MATTER
LA English
DT Article
AB A computationally simple way to accommodate 'basins' of trapping states in standard kinetic Monte Carlo simulations is presented. By assuming that the system is effectively equilibrated in the basin, the residence time ( time spent in the basin before escape) and the probabilities for transitions to states outside the basin may be calculated. This is demonstrated for point defect diffusion over a periodic grid of sites containing a complex basin.
C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA.
RP Van Siclen, CD (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA.
EM clinton.vansiclen@inl.gov
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0953-8984
J9 J PHYS-CONDENS MAT
JI J. Phys.-Condes. Matter
PD FEB 21
PY 2007
VL 19
IS 7
DI 10.1088/0953-8941/19/7/072201
PG 7
WC Physics, Condensed Matter
SC Physics
GA 135KS
UT WOS:000244153100003
ER

PT J
AU Kirby, SD
   Lee, M
   van Dover, RB
AF Kirby, S. D.
   Lee, M.
   van Dover, R. B.
TI An approach to achieving a negative index of refraction using coincident
   resonances
SO JOURNAL OF PHYSICS D-APPLIED PHYSICS
LA English
DT Article
ID THIN-FILMS; ANTIFERROMAGNETIC-RESONANCE; PROPAGATION; DISPERSION;
   BEHAVIOR; BATIO3; SRTIO3; OXIDE; NIO; MU
AB A novel method of achieving a negative index of refraction in the far-infrared region using intrinsic material properties is proposed. SrTiO3 has a dielectric resonance at similar to 100 cm(-1) that can be lowered by lowering the temperature or with Ba doping. NiO has an antiferromagnetic resonance at similar to 35 cm(-1) that can be raised with an applied field or with Co doping. These resonance frequencies can therefore be engineered to occur at the same frequency to achieve a negative index of refraction over an interval just above the coincident resonance. We show that SrTiO3 and NiO are readily chemically compatible and non-reacting at temperatures up to 1550 degrees C and can be formed into polycrystalline composite bodies. Epitaxial thin film heterostructures of ( SrTiO3/NiO) n/ MgO with n = 1, 2 have also been fabricated with very high crystal quality.
C1 Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Kirby, SD (reprint author), Cornell Univ, Dept Mat Sci & Engn, Ithaca, NY 14853 USA.
EM sdk32@cornell.edu
RI van Dover, Robert/B-6362-2011
OI van Dover, Robert/0000-0002-6166-5650
NR 25
TC 3
Z9 3
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0022-3727
J9 J PHYS D APPL PHYS
JI J. Phys. D-Appl. Phys.
PD FEB 21
PY 2007
VL 40
IS 4
BP 1161
EP 1166
DI 10.1088/0022-3727/40/4/038
PG 6
WC Physics, Applied
SC Physics
GA 151FG
UT WOS:000245274300039
ER

PT J
AU Keaton, RJ
   Blacquiere, JM
   Baker, RT
AF Keaton, Richard J.
   Blacquiere, Johanna M.
   Baker, R. Tom
TI Base metal catalyzed dehydrogenation of ammonia-borane for chemical
   hydrogen storage
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID N-H COMPOUNDS; THERMAL-DECOMPOSITION; COMPLEXES; REACTIVITY; RUTHENIUM;
   NICKEL(0); CARBENE
AB We report here the first example of a homogeneous first row transition-metal-based catalyst which is active for dehydrogenation of ammonia-borane, H3NBH3, a promising chemical hydrogen storage material. Addition of ammonia-borane to an active catalyst formed in situ from the reaction of Ni(cod)(2) and 2 equiv of an appropriate N-heterocyclic carbene (NHC) rapidly evolves hydrogen at 60 degrees C. Using a gas burette to quantify the gas evolved, 29 of a possible 31 mL of H-2 for 3 equiv of H-2 was produced, equating to > 2.5 equiv of H-2 from ammonia-borane. Kinetic isotope effects of deuterated derivatives of ammonia-borane suggest that both N-H and B-H bonds are being broken in the rate-determining step(s).
C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA.
RP Baker, RT (reprint author), Los Alamos Natl Lab, Div Chem, MS J582, Los Alamos, NM 87545 USA.
EM bakertom@lanl.gov
NR 18
TC 421
Z9 426
U1 16
U2 172
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD FEB 21
PY 2007
VL 129
IS 7
BP 1844
EP +
DI 10.1021/ja066860i
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 136EW
UT WOS:000244206400004
PM 17253687
ER

PT J
AU Werner, EJ
   Avedano, S
   Botta, M
   Hay, BP
   Moore, EG
   Aime, S
   Raymond, KN
AF Werner, Eric J.
   Avedano, Stefano
   Botta, Mauro
   Hay, Benjamin P.
   Moore, Evan G.
   Aime, Silvio
   Raymond, Kenneth N.
TI Highly soluble tris-hydroxypyridonate Gd(III) complexes with increased
   hydration number, fast water exchange, slow electronic relaxation, and
   high relaxivity
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID MRI CONTRAST AGENTS; GADOLINIUM COMPLEXES; STABILITY
AB The design, synthesis, and relaxivity properties of highly soluble TACN-capped trishydroxypyridonate-Gd(III) complexes are presented. Molecular mechanics modeling was used to help design a complex capable of possessing three water molecules in the inner metal coordination sphere, an attractive property for high-relaxivity MRI contrast agents. The measured relaxivities of 13.1 and 12.5 mM(-1) s(-1) (20 MHz, 298 K) for two TACN-capped complexes are among the highest known relaxivities of low-molecular weight Gd complexes and are consistent with three coordinated waters, an extremely fast water exchange rate, and long electronic relaxation time. Luminescence measurements to confirm the number of coordinated water molecules for the first time in the HOPO series are also discussed.
C1 Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
   Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
   Univ Piemonte Orientale A Avogadro, Dipartimento Sci Ambiente & Vita, Alessandria, Italy.
   Univ Turin, Dipartimento Chim, IFM, Turin, Italy.
RP Raymond, KN (reprint author), Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
EM raymond@socrates.berkeley.edu
RI Botta, Mauro/E-9049-2011; 
OI Botta, Mauro/0000-0003-4192-355X
FU NHLBI NIH HHS [HL69832, R01 HL069832]
NR 16
TC 50
Z9 50
U1 2
U2 16
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD FEB 21
PY 2007
VL 129
IS 7
BP 1870
EP +
DI 10.1021/ja068026z
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 136EW
UT WOS:000244206400017
PM 17260995
ER

PT J
AU Niyogi, S
   Boukhalfa, S
   Chikkannanavar, SB
   McDonald, TJ
   Heben, MJ
   Doorn, SK
AF Niyogi, Sandip
   Boukhalfa, Sofiane
   Chikkannanavar, Satishkumar B.
   McDonald, Timothy J.
   Heben, Michael J.
   Doorn, Stephen K.
TI Selective aggregation of single-walled carbon nanotubes via salt
   addition
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID SODIUM DODECYL-SULFATE; IONIZATION; NUMBER
AB Dispersion of single-walled carbon nanotubes in water with the use of sodium dodecylsulfate allows the study of properties of individual nanotubes. Nanotube isolation is maintained in the dispersions by the electrostatic repulsion between the dodecylsulfate groups adsorbed on the nanotube surface. We present data showing changes in SWNT absorbance and emission spectra in response to titrating the dispersion with salt solutions. The results show an ability to manipulate surface charge density on the SWNTs through changes in surfactant equilibria and charge screening. The diameter dependence of these effects allows diameter-selective aggregation of SWNTs, with some specific cases of chirality-dependent stability being demonstrated.
C1 Los Alamos Natl Lab, Div Chem, C CSE, Los Alamos, NM 87545 USA.
RP Doorn, SK (reprint author), Los Alamos Natl Lab, Div Chem, C CSE, Los Alamos, NM 87545 USA.
EM skdoorn@lanl.gov
NR 11
TC 87
Z9 88
U1 1
U2 28
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD FEB 21
PY 2007
VL 129
IS 7
BP 1898
EP +
DI 10.1021/ja068321j
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA 136EW
UT WOS:000244206400031
PM 17253695
ER

PT J
AU Shaw, GB
   Grant, CD
   Shirota, H
   Castner, EW
   Meyer, GJ
   Chen, LX
AF Shaw, George B.
   Grant, Christian D.
   Shirota, Hideaki
   Castner, Edward W., Jr.
   Meyer, Gerald J.
   Chen, Lin X.
TI Ultrafast structural rearrangements in the MLCT excited state for
   copper(I) bis-phenanthrolines in solution
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID CHARGE-TRANSFER STATES; SOLVATION DYNAMICS; X-RAY; PHOTOPHYSICAL
   PROPERTIES; ABSORPTION-SPECTROSCOPY; CU(NN)(2)(+) SYSTEMS;
   MOLECULAR-STRUCTURES; RAMAN-SPECTROSCOPY; DFT CALCULATIONS;
   ENERGY-TRANSFER
AB Ultrafast excited-state structural dynamics of [Cu-I(dmp)(2)](+) (dmp = 2,9-dimethyl-1,10-phenanthroline) have been studied to identify structural origins of transient spectroscopic changes during the photoinduced metal-to-ligand charge-transfer (MLCT) transition that induces an electronic configuration change from Cu(I) (3d(10)) to Cu(II) (3d(9)). This study has important connections with the flattening of the Franck-Condon state tetrahedral geometry and the ligation of Cu(II)* with the solvent observed in the thermally equilibrated MLCT state by our previous laser-initiated time-resolved X-ray absorption spectroscopy (LITR-XAS) results. To better understand the structural photodynamics of Cu(I) complexes, we have studied both [Cu-I(dmp)(2)](+) and [Cu-I(dpp)(2)](+) (dpp = 2,9-diphenyl-1,10-phenanthroline) in solvents with different dielectric constants, viscosities, and thermal diffusivities by transient absorption spectroscopy. The observed spectral dynamics suggest that a solvent-independent inner-sphere relaxation process is occurring despite the large amplitude motions due to the flattening of the tetrahedral coordinated geometry. The singlet fluorescence dynamics of photoexcited [Cu-I(dmp)(2)](+) were measured in the coordinating solvent acetonitrile, using the fluorescence upconversion method at different emission wavelengths. At the bluest emission wavelengths, a prompt fluorescence lifetime of 77 fs is attributed to the excited-state deactivation processes due to the internal conversion and intersystem crossing at the Franck-Condon state geometry. The differentiation between the prompt fluorescence lifetime with the tetrahedral Franck-Condon geometry and that with the flattened tetrahedral geometry uncovers an unexpected ultrafast flattening process in the MLCT state of [Cu-I(dmp)(2)](+). These results provide guidance for future X-ray structural studies on ultrafast time scale, as well as for synthesis toward its applications in solar energy conversion.
C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
   Rutgers State Univ, Dept Chem & Biol Chem, Piscataway, NJ 08854 USA.
   Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA.
RP Chen, LX (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM lchen@anl.gov
NR 66
TC 91
Z9 91
U1 4
U2 74
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD FEB 21
PY 2007
VL 129
IS 7
BP 2147
EP 2160
DI 10.1021/ja067271f
PG 14
WC Chemistry, Multidisciplinary
SC Chemistry
GA 136EW
UT WOS:000244206400063
PM 17256860
ER

PT J
AU Kuchibhatla, SVNT
   Karakoti, AS
   Seal, S
AF Kuchibhatla, Satyanarayana V. N. T.
   Karakoti, Ajay S.
   Seal, Sudipta
TI Hierarchical assembly of inorganic nanostructure building blocks to
   octahedral superstructures - a true template-free self-assembly
SO NANOTECHNOLOGY
LA English
DT Article
ID ENGINEERED OXIDE NANOPARTICLES; IN-VITRO TRAUMA; CEO2 NANORODS; CERIA;
   PROTECTION; MORPHOLOGY; DAMAGE; WATER; SHAPE
AB A room temperature, template-free, wet chemical synthesis of ceria nanoparticles and their long term ageing characteristics are reported. High resolution transmission electron microscopy and UV-visible spectroscopy techniques are used to observe the variation in size, structure and oxidation state, respectively as a function of time. The morphology variation and the hierarchical assembly (octahedral superstructure) of nanostructures are imputed to the inherent structural aspects of cerium oxide. It is hypothesized that the 3-5 nm individual building blocks will undergo an intra-agglomerate re-orientation to attain the low energy configuration. This communication also emphasizes the need for long term ageing studies of nanomaterials in various solvents for multiple functionalities.
C1 Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
   Univ Cent Florida, Nanosci Technol Ctr, Orlando, FL 32816 USA.
RP Kuchibhatla, SVNT (reprint author), Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32816 USA.
EM sseal@mail.ucf.edu
NR 29
TC 23
Z9 23
U1 0
U2 27
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0957-4484
J9 NANOTECHNOLOGY
JI Nanotechnology
PD FEB 21
PY 2007
VL 18
IS 7
AR 075303
DI 10.1088/0957-4484/18/7/075303
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 131MV
UT WOS:000243874200003
PM 21730498
ER

PT J
AU Beyerlein, IJ
   Toth, LS
   Tome, CN
   Suwas, S
AF Beyerlein, I. J.
   Toth, L. S.
   Tome, C. N.
   Suwas, S.
TI Role of twinning on texture evolution of silver during equal channel
   angular extrusion
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID STACKING-FAULT ENERGY; FCC METALS; PLASTIC-DEFORMATION; MICROSTRUCTURAL
   EVOLUTION; CRYSTALLOGRAPHIC TEXTURE; POLYCRYSTALLINE SILVER; MODELING
   TEXTURE; ZIRCONIUM ALLOYS; SINGLE-CRYSTALS; COPPER
AB The role of deformation twinning in the texture evolution of pure polycrystalline silver subjected to equal channel angular extrusion (Route A, three passes) has been examined. Microstructural characterization using electron backscattering diffraction and transmission electron microscopy revealed high twinning activity in every pass, as well as significant grain refinement. Polycrystal modelling combined with experimental analysis shows that texture evolution is a result of slip and deformation twinning that occurs in every pass. It is shown that the primary consequence of twinning is the reorientation of the A(1) ideal component into the A(2) orientation. This process results in a weak A(1) and a strong A(2) component. This twinning mechanism is repeated in each pass aided by the strain path changes associated with Route A and an apparent regeneration of the microstructure. As a result, with each pass the A(1) and C ideal shear components weaken, whereas the B/B components strengthen, tendencies that are distinct from those of high stacking fault fee metals like Al, Cu and Ni.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Univ Metz, Lab Phys & Mecan Mat, F-57045 Metz, France.
   Indian Inst Sci, Dept Met, Bangalore 560012, Karnataka, India.
RP Beyerlein, IJ (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM Irene@lanl.gov
RI toth, laszlo/A-4064-2013; Tome, Carlos/D-5058-2013; Beyerlein,
   Irene/A-4676-2011
OI toth, laszlo/0000-0001-7598-9026; 
NR 49
TC 52
Z9 53
U1 1
U2 16
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PD FEB 21
PY 2007
VL 87
IS 6
BP 885
EP 906
DI 10.1080/14786430601003866
PG 22
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 135JX
UT WOS:000244151000006
ER

PT J
AU Arokiam, AC
   Barashev, AV
   Bacon, DJ
   Osetsky, YN
AF Arokiam, A. C.
   Barashev, A. V.
   Bacon, D. J.
   Osetsky, Y. N.
TI Atomic-scale computer simulation study of the interaction of Cu-rich
   precipitates with irradiation-produced defects in alpha-Fe
SO PHILOSOPHICAL MAGAZINE
LA English
DT Article
ID RESOLUTION ELECTRON-MICROSCOPY; PRESSURE-VESSEL STEELS; 111 SCREW
   DISLOCATION; COPPER PRECIPITATION; NEUTRON-IRRADIATION; CORE STRUCTURE;
   DILUTE FECU; IRON; ALLOYS; TRANSPORT
AB Copper-rich precipitates can nucleate and grow in ferritic steels containing small amounts of copper in solution and this affects mechanical properties. Growth kinetics, composition and structure of precipitates under irradiation are different from those under thermal ageing, and also vary with type of radiation. This implies that the interaction between radiation defects, i.e. vacancies, self-interstitial atoms (SIAs) and their clusters, and precipitates is influential. It is studied here by atomic-scale computer simulation. The results are compared with those of elasticity theory based on the size misfit of precipitates and defects, and the modulus difference between bee iron and bee copper. It is found that SIA defects are repelled by precipitates at large distance but, like vacancies, attracted at small distance. Copper precipitates in iron can, therefore, be sinks for both vacancy and interstitial defects and hence can act as recombination centres under irradiation conditions. A tentative explanation for the mixed Cu-Fe structure of precipitates observed in experiment and the absence of precipitate growth under neutron irradiation is given. More generally, agreement between the simulations and elasticity theory suggests that the results are not artefacts of the atomic model: both vacancy and interstitial defects in metals may bind to precipitates with weaker cohesion than the matrix.
C1 Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England.
   Oak Ridge Natl Lab, Div Comp Sci & Math, Oak Ridge, TN 37831 USA.
RP Arokiam, AC (reprint author), Univ Liverpool, Dept Engn, Liverpool L69 3GH, Merseyside, England.
EM alanca@liverpool.ac.uk
NR 33
TC 17
Z9 17
U1 2
U2 12
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 1478-6435
J9 PHILOS MAG
JI Philos. Mag.
PD FEB 21
PY 2007
VL 87
IS 6
BP 925
EP 943
DI 10.1080/14786430601003908
PG 19
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
   Engineering; Physics, Applied; Physics, Condensed Matter
SC Materials Science; Metallurgy & Metallurgical Engineering; Physics
GA 135JX
UT WOS:000244151000008
ER

PT J
AU Chen, HT
   Kaminski, MD
   Caviness, PL
   Liu, XQ
   Dhar, P
   Torno, M
   Rosengart, AJ
AF Chen, Haitao
   Kaminski, Michael D.
   Caviness, Patricia L.
   Liu, Xianqiao
   Dhar, Promila
   Torno, Michael
   Rosengart, Axel J.
TI Magnetic separation of micro-spheres from viscous biological fluids
SO PHYSICS IN MEDICINE AND BIOLOGY
LA English
DT Article
ID EXTRACORPOREAL BLOOD-CIRCULATION; IMMUNOMAGNETIC CELL-SEPARATION;
   FLOW-THROUGH; HEMODIALYSIS; SURFACES; CAPTURE; SYSTEMS; FORMAT; MODEL;
   FIELD
AB A magnetically based detoxification system is being developed as a therapeutic tool for selective and rapid removal of biohazards, i.e. chemicals and radioactive substances, from human blood. One of the key components of this system is a portable magnetic separator capable of separating polymer-based magnetic nano/micro-spheres from arterial blood flow in an ex vivo unit. The magnetic separator consists of an array of alternating and parallel capillary tubing and magnetizable wires, which is exposed to an applied magnetic field created by two parallel permanent magnets such that the magnetic field is perpendicular to both the wires and the fluid flow. In this paper, the performance of this separator was evaluated via preliminary in vitro flow experiments using a separator unit consisting of single capillary glass tubing and two metal wires. Pure water, ethylene glycol-water solution (v:v = 39: 61 and v:v = 49: 51) and human whole blood were used as the fluids. The results showed that when the viscosity increased from 1.0 cp to 3.0 cp, the capture efficiency (CE) decreased from 90% to 56%. However, it is still feasible to obtain > 90% CE in blood flow if the separator design is optimized to create higher magnetic gradients and magnetic fields in the separation area.
C1 Univ Chicago, Pritzker Sch Med, Dept Neurol, Chicago, IL 60637 USA.
   IIT, Dept Biomed Engn, Chicago, IL 60616 USA.
   Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA.
   Univ Chicago, Pritzker Sch Med, Dept Surg Neurosurg, Chicago, IL 60637 USA.
RP Chen, HT (reprint author), Univ Chicago, Pritzker Sch Med, Dept Neurol, Chicago, IL 60637 USA.
EM arosenga@neurology.bsd.uchicago.edu
NR 40
TC 7
Z9 8
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0031-9155
EI 1361-6560
J9 PHYS MED BIOL
JI Phys. Med. Biol.
PD FEB 21
PY 2007
VL 52
IS 4
BP 1185
EP 1196
DI 10.1088/0031-9155/52/4/022
PG 12
WC Engineering, Biomedical; Radiology, Nuclear Medicine & Medical Imaging
SC Engineering; Radiology, Nuclear Medicine & Medical Imaging
GA 143IN
UT WOS:000244714100022
PM 17264379
ER

PT J
AU Magrini-Bair, KA
   Czernik, S
   French, R
   Parent, YO
   Chornet, E
   Dayton, DC
   Feik, C
   Bain, R
AF Magrini-Bair, Kimberly A.
   Czernik, Stefan
   French, Richard
   Parent, Yves O.
   Chornet, Esteban
   Dayton, David C.
   Feik, Calvin
   Bain, Richard
TI Fluidizable reforming catalyst development for conditioning
   biomass-derived syngas
SO APPLIED CATALYSIS A-GENERAL
LA English
DT Article
DE biomass gasification; fluidizable reforming catalysts
ID STEAM-OXYGEN MIXTURES; GASIFICATION; BED; NICKEL; GAS; REDUCTION;
   DOLOMITE; OLIVINE; TAR; HYDROGEN
AB A multi-stage catalyst development approach is used to evaluate and optimize fluidizable tar reforming catalysts for conditioning syngas from biomass gasification. Previous work showed that catalyst fluidization is required to efficiently reform biomass-derived pyrolysis oil and its fractions to syngas as fluidization optimizes contact between catalyst particles and feedstocks while reducing coke formation. Biomass-derived tars like pyrolysis oils are also complex, largely aromatic feedstocks that require fluidization to improve reforming efficiency. Because industrial reforming catalysts are designed for fixed-bed operations and not for fluidized processing, attrition resistant supports and catalysts required development. We identified and tested particulate aluminas for attrition resistance under fluidized steam reforming conditions and prepared nickel-based catalysts from the strongest supports. The performance of these catalysts was tested in a microactivity test system (MATS), which used I g catalyst quantities, had high throughput, and measured oxidation, reduction and model tar compound steam reforming. Promising candidates from MATS screening were next evaluated in a laboratory-scale fluidized bed reactor with 250 g of catalyst using more realistic flow conditions and input streams. A 60 kg batch of the best catalyst identified in the laboratory fluid bed was then prepared and evaluated for biomass-derived syngas conditioning in a pilot-scale reformer. Fresh and used catalysts were characterized with scanning electron, energy dispersive X-ray, and inductively coupled plasma spectroscopies. The most active and attrition resistant catalyst identified through multi-stage testing contains nickel, magnesium and potassium on 90% alpha alumina particles of 100-400 mu m size. (c) 2006 Elsevier B.V. All rights reserved.
C1 Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO 80401 USA.
   Chem Engn Consulting Serv, Golden, CO 80403 USA.
RP Magrini-Bair, KA (reprint author), Natl Renewable Energy Lab, Natl Bioenergy Ctr, 1617 Cole Blvd, Golden, CO 80401 USA.
EM kim_magrini@nrel.gov
NR 44
TC 54
Z9 55
U1 4
U2 33
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0926-860X
J9 APPL CATAL A-GEN
JI Appl. Catal. A-Gen.
PD FEB 20
PY 2007
VL 318
BP 199
EP 206
DI 10.1016/j.apcata.2006.11.005
PG 8
WC Chemistry, Physical; Environmental Sciences
SC Chemistry; Environmental Sciences & Ecology
GA 135HM
UT WOS:000244144700024
ER

PT J
AU Price, JR
   Bingham, PR
   Thomas, CE
AF Price, Jeffery R.
   Bingham, Philip R.
   Thomas, C. E., Jr.
TI Improving resolution in microscopic holography by computationally fusing
   multiple, obliquely illuminated object waves in the Fourier domain
SO APPLIED OPTICS
LA English
DT Article
ID WAFER DEFECT DETECTION; DIGITAL HOLOGRAPHY; INTERFEROMETRY
AB We present a computational method to increase the effective NA of a holographic microscopy system operating in air. Our optical system employs a reflection Mach-Zender architecture and computational reconstruction of the full complex (phase and amplitude) wavefront. Based on fundamental diffraction principles, different angles of incident illumination result in different diffracted orders of the object wave being imaged. We record, store, and computationally recombine these object waves to expand the spatial frequency response. Experimental results demonstrate an improvement in the effective NA of our system from 0.59 to 0.78.
C1 Oak Ridge Natl Lab, Image Sci & Machine Vis Grp, Oak Ridge, TN 37831 USA.
   Third Dimens Technol LLC, Knoxville, TN 37920 USA.
RP Price, JR (reprint author), Oak Ridge Natl Lab, Image Sci & Machine Vis Grp, POB 2008, Oak Ridge, TN 37831 USA.
EM pricejr@oml.gov; thomasce2@att.net
OI Bingham, Philip/0000-0003-4616-6084
NR 10
TC 15
Z9 15
U1 1
U2 3
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD FEB 20
PY 2007
VL 46
IS 6
BP 827
EP 833
DI 10.1364/AO.46.000827
PG 7
WC Optics
SC Optics
GA 136ZM
UT WOS:000244262600002
PM 17279126
ER

PT J
AU Michelsen, HA
   Tivanski, AV
   Gilles, MK
   van Poppel, LH
   Dansson, MA
   Buseck, PR
AF Michelsen, Hope A.
   Tivanski, Alexei V.
   Gilles, Mary K.
   van Poppel, Laura H.
   Dansson, Mark A.
   Buseck, Peter R.
TI Particle formation from pulsed laser irradiation of soot aggregates
   studied with a scanning mobility particle sizer, a transmission electron
   microscope, and a scanning transmission X-ray microscope
SO APPLIED OPTICS
LA English
DT Review
ID FRAGMENTATION FLUORESCENCE SPECTROSCOPY; CARBONACEOUS COMBUSTION
   RESIDUES; TURBULENT-DIFFUSION FLAMES; SINGLE-CRYSTAL GRAPHITE; ABLATED
   PLASMA PLUMES; INDUCED-INCANDESCENCE; OPTICAL-EMISSION;
   LIGHT-SCATTERING; VOLUME FRACTION; AMORPHOUS-CARBON
AB We investigated the physical and chemical changes induced in soot aggregates exposed to laser radiation using a scanning mobility particle sizer, a transmission electron microscope, and a scanning transmission x-ray microscope to perform near-edge x-ray absorption fine structure spectroscopy. Laser-induced nanoparticle production was observed at fluences above 0.12 J/cm(2) at 532 nm and 0.22 J/cm(2) at 1064 nm. Our results indicate that new particle formation proceeds via (1) vaporization of small carbon clusters by thermal or photolytic mechanisms, followed by homogeneous nucleation, (2) heterogeneous nucleation of vaporized carbon clusters onto material ablated from primary particles, or (3) both processes.
C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
   Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA.
   Arizona State Univ, Dept Geol Sci, Tempe, AZ 85287 USA.
   Arizona State Univ, Dept Chem Biochem, Tempe, AZ 85287 USA.
RP Michelsen, HA (reprint author), Sandia Natl Labs, Combust Res Facil, POB 969,Mail Stop 9055, Livermore, CA 94551 USA.
EM hamiche@sandia.gov
NR 121
TC 33
Z9 34
U1 1
U2 19
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD FEB 20
PY 2007
VL 46
IS 6
BP 959
EP 977
DI 10.1364/AO.46.000959
PG 19
WC Optics
SC Optics
GA 136ZM
UT WOS:000244262600020
PM 17279144
ER

PT J
AU Nakamura, M
   Li, H
   Li, ST
AF Nakamura, Masanori
   Li, Hui
   Li, Shengtai
TI Stability properties of magnetic tower jets
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies : active; galaxies : jets; instabilities; methods : numerical;
   MHD
ID CURRENT-DRIVEN INSTABILITIES; ACTIVE GALACTIC NUCLEI; ELECTRON-POSITRON
   JET; YOUNG STELLAR OBJECTS; TRANS-ALFVENIC JETS; ASTROPHYSICAL JETS;
   KINK INSTABILITY; WIGGLED STRUCTURE; FARADAY-ROTATION; ACCRETION DISCS
AB Stability properties of "magnetic tower'' jets propagating in a gravitationally stratified background have been examined by performing three-dimensional magnetohydrodynamic simulations. The current-carrying, Poynting flux dominated magnetic tower jet, which possesses a highly wound helical magnetic field, is subject to the current-driven instability (CDI). We find that, under general physical conditions including small perturbations in the initial background profiles, the propagating magnetic tower jets develop the nonaxisymmetric, m = 1 kink mode of the CDI. The kink mode grows on the local Alfven crossing timescale. In addition, two types of kink modes appear in the system. At the central region where external thermal pressure confinement is strong, only the internal kink mode is excited and will grow. A large distance away from the central region where the external thermal pressure becomes low, the external kink mode is observed. As a result, the exterior of magnetic tower jets will be deformed into a large-scale wiggled structure. We also discuss extensively the different physical processes that contribute to the overall stability properties of the magnetic tower jets. Specifically, when the jet propagates in an initially unperturbed background, we find that it can survive the kink mode beyond the point predicted by the well-known Kruskal-Shafranov (K-S) criterion. The stabilization in this case comes mainly from the dynamical relaxation of magnetic twists during the propagation of magnetic towers; the magnetic pitch is reduced, and the corresponding K-S critical wavelength becomes longer as the tower jet proceeds. Furthermore, we show that the pressure-driven and Kelvin-Helmholtz instabilities do not occur in the magnetic tower jets. This strongly suggests that the CDI is the primary reason for the wiggling structures in jets.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Nakamura, M (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
EM nakamura@lanl.gov
OI Li, Shengtai/0000-0002-4142-3080
NR 56
TC 49
Z9 49
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2007
VL 656
IS 2
BP 721
EP 732
DI 10.1086/510361
PN 1
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 138BG
UT WOS:000244336900011
ER

PT J
AU Krumholz, MR
   Klein, RI
   McKee, CF
AF Krumholz, Mark R.
   Klein, Richard I.
   McKee, Christopher F.
TI Radiation-hydrodynamic simulations of collapse and fragmentation in
   massive protostellar cores
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE accretion, accretion disks; equation of state; ISM : clouds; methods :
   numerical; radiative transfer; stars : formation
ID ADAPTIVE MESH REFINEMENT; ECCENTRIC GRAVITATIONAL INSTABILITIES;
   MOLECULAR CLOUD CORES; ORION NEBULA CLUSTER; INFRARED DARK CLOUDS;
   STAR-FORMATION; STELLAR CLUSTERS; COMPETITIVE ACCRETION; SUBMILLIMETER
   CLUMPS; AMBIPOLAR-DIFFUSION
AB We simulate the early stages of the evolution of turbulent, virialized, high-mass protostellar cores, with primary attention to how cores fragment and whether they form a small or large number of protostars. Our simulations use the Orion adaptive mesh refinement code to follow the collapse from similar to 0.1 pc scales to similar to 10 AU scales, for durations that cover the main fragmentation phase, using three-dimensional gravito-radiation hydrodynamics. We find that for a wide range of initial conditions radiation feedback from accreting protostars inhibits the formation of fragments, so that the vast majority of the collapsed mass accretes onto one or a few objects. Most of the fragmentation that does occur takes place in massive, self-shielding disks. These are driven to gravitational instability by rapid accretion, producing rapid mass and angular momentum transport that allows most of the gas to accrete onto the central star rather than forming fragments. In contrast, a control run using the same initial conditions but an isothermal equation of state produces much more fragmentation, both in and out of the disk. We conclude that massive cores with observed properties are not likely to fragment into many stars, so that, at least at high masses, the core mass function probably determines the stellar initial mass function. Our results also demonstrate that simulations of massive star-forming regions that do not include radiative transfer, and instead rely on a barotropic equation of state or optically thin heating and cooling curves, are likely to produce misleading results.
C1 Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
   Lawrence Livermore Natl Lab, Livermore, CA USA.
RP Krumholz, MR (reprint author), Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
EM krumholz@astro.princeton.edu; klein@astron.berkeley.edu;
   cmckee@astron.berkeley.edu
OI Krumholz, Mark/0000-0003-3893-854X
NR 97
TC 218
Z9 219
U1 0
U2 5
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2007
VL 656
IS 2
BP 959
EP 979
DI 10.1086/510664
PN 1
PG 21
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 138BG
UT WOS:000244336900032
ER

PT J
AU Saumon, D
   Marley, MS
   Leggett, SK
   Geballe, TR
   Stephens, D
   Golimowski, DA
   Cushing, MC
   Fan, X
   Rayner, JT
   Lodders, K
   Freedman, RS
AF Saumon, D.
   Marley, M. S.
   Leggett, S. K.
   Geballe, T. R.
   Stephens, D.
   Golimowski, D. A.
   Cushing, M. C.
   Fan, X.
   Rayner, J. T.
   Lodders, K.
   Freedman, R. S.
TI Physical parameters of two very cool T dwarfs
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE stars : individual (2MASS J04151954-0935066, 2MASS J12171110-0311131, G1
   570D) stars : low-mass, brown dwarfs
ID SPITZER-SPACE-TELESCOPE; ALL-SKY SURVEY; BROWN DWARFS; GLIESE 229B;
   SPECTRAL CLASSIFICATION; INFRARED SPECTROGRAPH; CARBON-MONOXIDE;
   ATMOSPHERIC CHEMISTRY; GIANT PLANETS; METHANE
AB We present new infrared spectra of the T8 brown dwarf 2MASS J04151954 - 0935066: 2.9 - 4.1 mu m spectra obtained with the Infrared Camera and Spectrograph on the Subaru Telescope, and 5.2 - 14.5 mu m spectra obtained with the Infrared Spectrograph on the Spitzer Space Telescope. We use these data and models to determine an accurate bolometric luminosity of log L-bol/ L-circle dot = -5.67 and to constrain the effective temperature, gravity, mass, and age to 725 - 775 K, log g = 5.00 - 5.37, M = 33 - 58 M-Jup, and age = 3 - 10 Gyr. We perform the same analysis using published 0.6 - 15 mu m spectra for the T7.5 dwarf 2MASS J12171110 - 0311131, for which we find a metal-rich composition ([Fe/H] similar to 0: 3), and log L-bol/L-circle dot = -5.31, T-eff = 850 - 950 K, log g = 4.80 - 5.42, M = 25 - 66 M-Jup, and age = 1 - 10 Gyr. These luminosities and effective temperatures straddle those determined with the same method and models for G1 570D by Saumon et al. and make 2MASS J04151954 - 0935066 the coolest and least luminous T dwarf with well-determined properties. We find that synthetic spectra generated by the models reproduce the observed red through mid-infrared spectra of 2MASS J04151954 - 0935066 and 2MASS J12171110 - 0311131 very well, except for known discrepancies that are most likely due to the incomplete CH4 opacities. Both objects show evidence of departures from strict chemical equilibrium, and we discuss this result in the context of other late T dwarfs in which disequilibrium phenomena have been observed.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   Gemini Observ, Hilo, HI 96720 USA.
   Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
   Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
   Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
   Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA.
   NASA, Ames Res Ctr, SETI Inst, Moffett Field, CA 94035 USA.
RP Saumon, D (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM dsaumon@lanl.gov
OI Leggett, Sandy/0000-0002-3681-2989
NR 49
TC 73
Z9 73
U1 0
U2 3
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD FEB 20
PY 2007
VL 656
IS 2
BP 1136
EP 1149
DI 10.1086/510557
PN 1
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 138BG
UT WOS:000244336900045
ER

PT J
AU Parsons, JF
   Greenhagen, BT
   Shi, K
   Calabrese, K
   Robinson, H
   Ladner, JE
AF Parsons, James F.
   Greenhagen, Bryan T.
   Shi, Katherine
   Calabrese, Kelly
   Robinson, Howard
   Ladner, Jane E.
TI Structural and functional analysis of the pyocyanin biosynthetic protein
   PhzM from Pseudomonas aeruginosa
SO BIOCHEMISTRY
LA English
DT Article
ID METHYLTRANSFERASE; FLUORESCENS; MECHANISM; INFECTION; PRODUCTS;
   PIGMENTS; COMPLEX
AB Pyocyanin is a biologically active phenazine produced by the human pathogen Pseudomonas aeruginosa. It is thought to endow P. aeruginosa with a competitive growth advantage in colonized tissue and is also thought to be a virulence factor in diseases such as cystic fibrosis and AIDS where patients are commonly infected by pathogenic Pseudomonads due to their immunocompromised state. Pyocyanin is also a chemically interesting compound due to its unusual oxidation-reduction activity. Phenazine-1-carboxylic acid, the precursor to the bioactive phenazines, is synthesized from chorismic acid by enzymes encoded in a seven-gene cistron in P. aeruginosa and in other Pseudomonads. Phenzine-1-carboxylic acid is believed to be converted to pyocyanin by the sequential actions of the putative S-adenosylmethionine-dependent N-methyltransferase PhzM and the putative flavin-dependent hydroxylase PhzS. Here we report the 1.8 A crystal structure of PhzM determined by single anomalous dispersion. Unlike many methyltransferases, PhzM is a dimer in solution. The 36 kDa PhzM polypeptide folds into three domains. The C-terminal domain exhibits the alpha/beta-hydrolase fold typical of small molecule methyltransferases. Two smaller N-terminal domains form much of the dimer interface. Structural alignments with known methyltransferases show that PhzM is most similar to the plant O-methyltransferases that are characterized by an unusual intertwined dimer interface. The structure of PhzM contains no ligands, and the active site is open and solvent-exposed when compared to structures of similar enzymes. In vitro experiments using purified PhzM alone demonstrate that it has little or no ability to methylate phenzine-1-carboxylic acid. However, when the putative hydroxylase PhzS is included, pyocyanin is readily produced. This observation suggests that a mechanism has evolved in P. aeruginosa that ensures efficient production of pyocyanin via the prevention of the formation and release of an unstable and potentially deleterious intermediate.
C1 Univ Maryland, Inst Biotechnol, Ctr Adv Res Biotechnol, NIST, Rockville, MD 20850 USA.
   Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA.
RP Parsons, JF (reprint author), Univ Maryland, Inst Biotechnol, Ctr Adv Res Biotechnol, NIST, 9600 Gudelsky Dr, Rockville, MD 20850 USA.
EM parsonsj@umbi.umd.edu; ladner@umbi.umd.edu
FU NIAID NIH HHS [AI067530, R01 AI067530, R01 AI067530-01A1]
NR 29
TC 39
Z9 41
U1 1
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD FEB 20
PY 2007
VL 46
IS 7
BP 1821
EP 1828
DI 10.1021/bi6024403
PG 8
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 135OC
UT WOS:000244161900012
PM 17253782
ER

PT J
AU Hang, B
   Guhaev, AB
AF Hang, Bo
   Guhaev, Anton B.
TI Substrate specificity of human thymine-DNA glycosylase on exocyclic
   cytosine adducts
SO CHEMICO-BIOLOGICAL INTERACTIONS
LA English
DT Article
DE glycidaldehyde; chloroethylnitrosoureas; hydroxymethyl etheno adduct;
   ethano adduct; thymine-DNA glycosylase
ID SITE-SPECIFIC INCORPORATION; CRYSTAL-STRUCTURE; VINYL-CHLORIDE;
   MOLECULAR-DYNAMICS; OLIGOMERIC DNA; N-GLYCOSYLASE; IN-VITRO; MISMATCH;
   GLYCIDALDEHYDE; REPAIR
AB The environmental carcinogen glycidaldehyde (GDA) and therapeutic chloroethylnitrosoureas (CNUs) can form hydroxymethyl etheno and ring-saturated ethano bases, respectively. The mutagenic potential of these adducts relies on their miscoding properties and repair efficiency. In this work, the ability of human thymine-DNA glycosylase (TDG) to excise 8-(hydroxymethyl)-3,N(4)-ethenocytosine (8-hm-epsilon C) and 3,N(4)-ethanocytosine (EC) was investigated and compared with epsilon C, a known substrate for TDG. When tested using defined oligonucleotides containing a single adduct, TDG is able to excise 8-hm-eC but not EC. The 8-hm-epsilon C activity mainly depends on guanine pairing with the adduct. TDG removes 8-hm-epsilon C less efficiently than epsilon C but its activity can be significantly enhanced by human AP endonuclease I (APEI), a downstream enzyme in the base excision repair. TDG did not show any detectable activity toward EC when placed in various neighboring sequences, including the 5'-CpG site. Molecular modeling revealed a possible steric clash between the non-planar EC exocyclic ring and residue Asn 191 within the TDG active site, which could account for the lack of TDG activity toward EC. TDG was not active against the bulkier exocyclic adduct 3,N(4)-benzethenocytosine, nor the two adenine derivatives with same modifications as the cytosine derivatives, 7-hm-epsilon A and EA. These findings expand the TDG substrate range and aid in understanding the structural requirements for TDG substrate specificity. (c) 2007 Elsevier Ireland Ltd. All rights reserved.
C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genom Stabil, Div Life Sci, Berkeley, CA 94720 USA.
RP Hang, B (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Genom Stabil, Div Life Sci, Berkeley, CA 94720 USA.
EM Bo_hang@lbl.gov
FU NCI NIH HHS [R01 CA072079-09, CA72079]
NR 41
TC 8
Z9 8
U1 0
U2 7
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
   IRELAND
SN 0009-2797
J9 CHEM-BIOL INTERACT
JI Chem.-Biol. Interact.
PD FEB 20
PY 2007
VL 165
IS 3
BP 230
EP 238
DI 10.1016/j.cbi.2006.12.013
PG 9
WC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology
SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology
GA 144OA
UT WOS:000244804500007
PM 17270163
ER

PT J
AU Yang, SH
   Li, GB
   You, LP
   Tao, JL
   Loong, CK
   Tian, SJ
   Liao, FH
   Lin, JH
AF Yang, Sihai
   Li, Guobao
   You, Liping
   Tao, Julian
   Loong, Chun-K.
   Tian, Shujian
   Liao, Fuhui
   Lin, Jianhua
TI Na-3[Ti2P2O10F]: A new oxyfluorinated titanium phosphate with an ionic
   conductive property
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID HYDROTHERMAL SYNTHESIS
AB Titanium phosphate, Na-3[Ti2P2O10F]center dot xH(2)O (1), has been synthesized under hydrothermal conditions and structurally characterized using powder X-ray diffraction, neutron diffraction, and selected area electron diffraction (SAED). 1 crystallizes in the tetragonal space group I4/mmm with a = 6.4207(1) A and c = 10.6762(2) A and can be described by the stacking of a square-net sheet consisting of alternative linkage of TiFO5 octahedra and PO4 tetrahedra. The TiFO5 octahedron is highly distorted, with a short "titanyl" Ti-O bond and a long Ti-F bond. The "titanyl" oxygen is almost doubly bonded to Ti; the square-net sheets are linked only by sharing common F atoms, which lead to a rather opened framework containing 2D channels in the ab plane. The counter cations Na+ and water molecules reside in the channels. At high temperature, the adsorbed water molecules escape from the channels, leading to an anhydrous phase Na-3[Ti2P2O10F] (2) with exactly the same structural framework as that of 1. 2 is stable at high temperature in an Ar atmosphere, but decomposes to other known titanium phosphates and oxide at about 650 degrees C in air. The Na ions in the compound are exchangeable. In addition, 2 exhibits a Na conductivity comparable to that of the NASICON type titanium phosphates (1.0 x 10(-4) Omega(-1) cm(-1) at 200 degrees C).
C1 Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China.
   Peking Univ, Eletron Microscope Lab, Beijing 100871, Peoples R China.
   Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA.
RP Li, GB (reprint author), Peking Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China.
EM liguobao@pku.edu.cn; jhlin@pku.edu.cn
RI Li, Guobao/F-3690-2016
OI Li, Guobao/0000-0003-3061-193X
NR 7
TC 15
Z9 15
U1 5
U2 24
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD FEB 20
PY 2007
VL 19
IS 4
BP 942
EP 947
DI 10.1021/cm062513w
PG 6
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA 135OB
UT WOS:000244161800043
ER

PT J
AU Ortiz-Monasterio, JI
   Lobell, DB
AF Ortiz-Monasterio, J. Ivan
   Lobell, David B.
TI Remote sensing assessment of regional yield losses due to sub-optimal
   planting dates and fallow period weed management
SO FIELD CROPS RESEARCH
LA English
DT Article
DE wheat; planting date; fallow period weeds; remote sensing; satellites
ID WHEAT YIELD; TEMPERATURE; RADIATION
AB New tools in agricultural research are needed for improved assessment of agronomic practices and their impacts on crop production. Remote sensing data acquired by satellite sensors offers great promise to complement field-based approaches, which generally suffer from small sample sizes. In this stud, we used Landsat data from the Yaqui Valley, a prominent spring wheat (Triticum aestivum L.) growing region in Northwest Mexico, to investigate the effect of planting date and fallow period weeds on wheat yields. Three crops cycles were analyzed for the planting date study, while 2 years were investigated for the weed study.
   The satellite estimates of planting date agreed well with farmer reported dates in 100 fields (r(2) = 0.85, rmse = 6.5 days), although they tended to underestimate dates for early plantings (5-20 November). Comparison of planting dates with remotely sensed yields indicated that yield reductions associated with planting outside the recommended planting date (RPD) were generally small, but can be significant in years when a large number of fields are planted outside the RPD. The weed assessment study showed that wheat yields decreased substantially (> 1 t ha(-1)) when there were weeds in fields during the summer prior to planting. The total regional production loss associated with weeds during the fallow period was estimated as 5%, which implies that substantial agronomic and economic gains can be attained by maintaining fields weed free during the summer. We conclude that remote sensing provides important information for agricultural research and should be considered a valuable tool to complement field-based approaches. (c) 2006 Elsevier B.V. All rights reserved.
C1 CIMMYT, Int Maize & Wheat Improvement Ctr, Wheat Program, Mexico City 06600, DF, Mexico.
   Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94550 USA.
RP Ortiz-Monasterio, JI (reprint author), CIMMYT, Int Maize & Wheat Improvement Ctr, Wheat Program, Apdo Postal 6-641, Mexico City 06600, DF, Mexico.
EM i.monasterio@cgiar.org
NR 19
TC 23
Z9 26
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-4290
J9 FIELD CROP RES
JI Field Crop. Res.
PD FEB 20
PY 2007
VL 101
IS 1
BP 80
EP 87
DI 10.1016/j.fcr.2006.09.012
PG 8
WC Agronomy
SC Agriculture
GA 129WY
UT WOS:000243762000011
ER

PT J
AU Stolzenburg, M
   Marshall, TC
   Rust, WD
   Bruning, E
   MacGorman, DR
   Hamlin, T
AF Stolzenburg, Maribeth
   Marshall, Thomas C.
   Rust, W. David
   Bruning, Eric
   MacGorman, Donald R.
   Hamlin, Timothy
TI Electric field values observed near lightning flash initiations
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID AIR BREAKDOWN; THUNDERSTORM; CHARGE; MECHANISM; REGIONS
AB From a dataset of about 250 soundings of electric field ( E), nine were adversely affected by lightning. These soundings are interpreted as ending near lightning initiation locations. Scaled to standard pressure, the largest observed E was 626 kV m(-1) and the largest estimated E was 929 kV m(-1). E exceeded runaway breakdown threshold, RBth, by factors of 1.1 - 3.3 before each flash, and overvoltages were 1.4 - 4.3. Seven cases had rapid E increases ( rates of 11 - 100 kV m(-1) s(-1)) in the few seconds before the flash, and in three the maximum E occurred 3 s or more before the flash. A tenth sounding with E > RBth for 38 s had subsequent lightning initiate 2 km from the balloon; one channel came within 400 m, but the flash and large E did not adversely affect the instruments. The findings suggest that E > RBth is a necessary condition for lightning initiation, but it is not sufficient.
C1 Univ Mississippi, Dept Phys & Astron, University, MS 38677 USA.
   NOAA, Dept Commerce, Natl Severe Storms Lab, Norman, OK 73072 USA.
   Univ Oklahoma, Cooperat Inst Mesoscale Meteorol Studies, Norman, OK 73072 USA.
   Los Alamos Natl Lab, Space & Remote Sensing Grp, Los Alamos, NM 87545 USA.
RP Stolzenburg, M (reprint author), Univ Mississippi, Dept Phys & Astron, University, MS 38677 USA.
EM mstolzen@olemiss.edu
OI Stolzenburg, Maribeth/0000-0001-8773-8101; MacGorman,
   Donald/0000-0002-2395-8196
NR 21
TC 43
Z9 45
U1 0
U2 6
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD FEB 20
PY 2007
VL 34
IS 4
AR L04804
DI 10.1029/2006GL028777
PG 7
WC Geosciences, Multidisciplinary
SC Geology
GA 140AK
UT WOS:000244474200006
ER

PT J
AU Liu, HH
   Zhang, YQ
   Zhou, Q
   Molz, FJ
AF Liu, H. H.
   Zhang, Y. Q.
   Zhou, Q.
   Molz, F. J.
TI An interpretation of potential scale dependence of the effective matrix
   diffusion coefficient
SO JOURNAL OF CONTAMINANT HYDROLOGY
LA English
DT Article
DE matrix diffusion; solute transport; scale dependence; fractured rock
ID FRACTURED CRYSTALLINE ROCK; TRACER TESTS; SOLUTE TRANSPORT; CONTINUUM
   APPROACH; UNSATURATED FLOW; SINGLE FRACTURE; MODELING FLOW; NETWORKS;
   MEDIA; CONNECTIVITY
AB Matrix diffusion is an important process for solute transport in fractured rock, and the matrix diffusion coefficient is a key parameter for describing this process. Previous studies have indicated that the effective rnatrix diffusion coefficient values, obtained from a large number of field tracer tests, are enhanced in comparison with local values and may increase with test scale. In this study, we have performed numerical experiments to investigate potential mechanisms behind possible scale-dependent behavior. The focus of the experiments is on solute transport in flow paths having geometries consistent with percolation theories and characterized by multiple local flow loops formed mainly by small-scale fractures. The water velocity distribution through a flow path was determined using discrete fracture network flow simulations, and solute transport was calculated using a previously derived impulse-response function and a particle-tracking scheme. Values for effective (or up-scaled) transport parameters were obtained by matching breakthrough curves from numerical experiments with an analytical solution for solute transport along a single fracture. Results indicate that a combination of local flow loops and the associated matrix diffusion process, together with scaling properties in flow path geometry, seems to be an important mechanism causing the observed scale dependence of the effective rnatrix diffusion coefficient (at a range of scales). (c) 2006 Elsevier B.V. All rights reserved.
C1 Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA USA.
   Clemson Univ, Dept Environm Sci & Engn, Clemson, SC USA.
RP Liu, HH (reprint author), Lawrence Berkeley Natl Lab, Div Earth Sci, Berkeley, CA USA.
EM hhliu@lbl.gov
RI Zhou, Quanlin/B-2455-2009; Zhang, Yingqi/D-1203-2015
OI Zhou, Quanlin/0000-0001-6780-7536; 
NR 37
TC 24
Z9 24
U1 3
U2 13
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-7722
J9 J CONTAM HYDROL
JI J. Contam. Hydrol.
PD FEB 20
PY 2007
VL 90
IS 1-2
BP 41
EP 57
DI 10.1016/j.jconhyd.2006.09.006
PG 17
WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources
SC Environmental Sciences & Ecology; Geology; Water Resources
GA 122QB
UT WOS:000243240400003
PM 17067718
ER

PT J
AU Luketa-Hanlin, A
   Koopman, RP
   Ermak, DL
AF Luketa-Hanlin, Anay
   Koopman, Ronald P.
   Ermak, Donald L.
TI On the application of computational fluid dynamics codes for liquefied
   natural gas dispersion
SO JOURNAL OF HAZARDOUS MATERIALS
LA English
DT Article
DE liquefied natural gas; CFD; dispersion; kappa-epsilon model; validation
ID ATMOSPHERIC BOUNDARY-LAYER; K-EPSILON MODEL; TURBULENCE MODEL; STABLE
   ABL; CFD; SIMULATIONS; VALIDATION; SMEDIS
AB Computational fluid dynamics (CFD) codes are increasingly being used in the liquefied natural gas (LNG) industry to predict natural gas dispersion distances. This paper addresses several issues regarding the use of CFD for LNG dispersion such as specification of the domain, grid, boundary and initial conditions. A description of the k-epsilon model is presented, along with modifications required for atmospheric flows. Validation issues pertaining to the experimental data from the Burro, Coyote, and Falcon series of LNG dispersion experiments are also discussed. A description of the atmosphere is provided as well as discussion on the inclusion of the Coriolis force to model very large LNG spills. (c) 2006 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Fire Sci & Technol Dept, Albuquerque, NM 87185 USA.
   Hazard Anal Consulting, Livermore, CA 94550 USA.
RP Luketa-Hanlin, A (reprint author), Sandia Natl Labs, Fire Sci & Technol Dept, POB 5800,MS-1135, Albuquerque, NM 87185 USA.
EM aluketa@sandia.gov; rpkoopman@comcast.net
NR 45
TC 49
Z9 54
U1 1
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3894
J9 J HAZARD MATER
JI J. Hazard. Mater.
PD FEB 20
PY 2007
VL 140
IS 3
BP 504
EP 517
DI 10.1016/j.jhazmat.2006.10.023
PG 14
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 144CK
UT WOS:000244772700009
PM 17113710
ER

PT J
AU Szalai, ML
   McGrath, DV
   Wheeler, DR
   Zifer, T
   McElhanon, JR
AF Szalai, Michael L.
   McGrath, Dominic V.
   Wheeler, David R.
   Zifer, Thomas
   McElhanon, James R.
TI Dendrimers based on thermally reversible furan-maleimide Diels-Alder
   adducts
SO MACROMOLECULES
LA English
DT Article
ID HIGHLY EFFICIENT; CLICK CHEMISTRY; CROSS-LINKING; POLYPHENYLENE
   DENDRIMERS; CARBOSILANE DENDRIMER; POLYMER CHEMISTRY; ANTHRACENE;
   COPOLYMERS; DENDRONS; PHOTOMODULATION
AB Thermally labile dendrimers based on the reversible furan-maleimide Diels-Alder reaction are described. First through fourth generation benzyl aryl ether based dendrons 3a-d that contained furan moieties at their focal point were allowed to react with bismaleimide central linker 4 to provide the corresponding dendrimers 5-8. Thermal degradation and reassembly of these dendrimers were studied under a variety of conditions and monitored by GPC and NMR.
C1 Sandia Natl Labs, Dept Chem Mat, Livermore, CA 94551 USA.
   Univ Arizona, Dept Chem, Tucson, AZ 85721 USA.
   Sandia Natl Labs, Micro Total Analyt Syst Dept, Albuquerque, NM 87185 USA.
RP McGrath, DV (reprint author), Sandia Natl Labs, Dept Chem Mat, Livermore, CA 94551 USA.
EM mcgrath@u.arizona.edu; jrmcelh@sandia.gov
RI McGrath, Dominic/A-7675-2012
NR 50
TC 81
Z9 82
U1 7
U2 40
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD FEB 20
PY 2007
VL 40
IS 4
BP 818
EP 823
DI 10.1021/ma062093w
PG 6
WC Polymer Science
SC Polymer Science
GA 135NR
UT WOS:000244160800011
ER

PT J
AU Yang, Y
   Cheng, MMC
   Hu, X
   Liu, DH
   Goyette, RJ
   Lee, LJ
   Ferrari, M
AF Yang, Yong
   Cheng, Mark Ming-Cheng
   Hu, Xin
   Liu, Dehua
   Goyette, Richard J.
   Lee, L. James
   Ferrari, Mauro
TI Low-pressure carbon dioxide enhanced polymer chain mobility below the
   bulk glass transition temperature
SO MACROMOLECULES
LA English
DT Article
ID POLYSTYRENE FILMS; NEUTRON REFLECTIVITY; SOLID INTERFACE;
   INITIAL-STAGES; THIN-FILMS; INTERDIFFUSION; SUBSTRATE; SURFACES;
   DIFFUSION; DYNAMICS
AB The effects of low-pressure carbon dioxide (CO2) on chain mobility of polystyrene (PS) and poly(methyl methacrylate) (PMMA) thin films coated on a solid surface were studied using PS/deuterated PS/Si and PMMA/deuterated PMMA/SiO2 configurations. The time evolution of chain diffusion below the bulk glass transition temperature (T-g) with and without CO2 was measured by neutron reflectivity. It was found that polymer chains at the interface can self-diffuse at a temperature below their bulk T-g because of higher surface chain mobility and that adding CO2, even at low pressures, can greatly enhance the chain mobility. When the interactions between the polymer chains and the substrate are weak as in the PS/Si configuration, the confining effects of the substrate are not significant, while in the case of the PMMA/SiO2 configuration the interactions are strong enough to confine polymer chains onto the substrate at the nanoscale. Introducing CO2 tends to alleviate this confining effect.
C1 Ohio State Univ, Dept Chem & Biomol Engn, Columbus, OH 43210 USA.
   Ohio State Univ, Div Hematol & Oncol, Dept Internal Med, Columbus, OH 43210 USA.
   Ohio State Univ, Dept Mech Engn, Columbus, OH 43210 USA.
   Argonne Natl Lab, Argonne, IL 60439 USA.
RP Lee, LJ (reprint author), Ohio State Univ, Dept Chem & Biomol Engn, Columbus, OH 43210 USA.
EM lee.31@osu.edu
NR 32
TC 16
Z9 16
U1 1
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD FEB 20
PY 2007
VL 40
IS 4
BP 1108
EP 1111
DI 10.1021/ma061492o
PG 4
WC Polymer Science
SC Polymer Science
GA 135NR
UT WOS:000244160800047
ER

PT J
AU Ruegg, ML
   Reynolds, BJ
   Lin, MY
   Lohse, DJ
   Balsara, NP
AF Ruegg, Megan L.
   Reynolds, Benedict J.
   Lin, Min Y.
   Lohse, David J.
   Balsara, Nitash P.
TI Minimizing the concentration of diblock copolymer needed to organize
   blends of weakly segregated polymers by tuning attractive and repulsive
   interactions
SO MACROMOLECULES
LA English
DT Article
ID ANGLE NEUTRON-SCATTERING; TERNARY HOMOPOLYMER/DIBLOCK BLENDS;
   MULTICOMPONENT POLYOLEFIN BLENDS; BLOCK-COPOLYMER; PHASE-BEHAVIOR;
   BICONTINUOUS MICROEMULSIONS; MOLECULAR-WEIGHT; THERMODYNAMIC PROPERTIES;
   INTERFACIAL-TENSION; MONTE-CARLO
AB This paper is concerned with the design of A-C diblock copolymer surfactants for stabilizing mixtures of weakly segregated A and B homopolymers. Component A was saturated polybutadiene with 89% 1,2-addition, component B was polyisobutylene, and component C was saturated polybutadiene with 63% 1,2-addition. The C-block exhibits attractive interactions with B and repulsive interactions with A. The effect of the molecular weight and concentration of the A-C block copolymer on the phase behavior of critical A/B mixtures was studied by small-angle neutron scattering. We show that organized microphases are obtained when as little as 1 vol % of the A-C copolymer is added to a 50/50 A/B mixture. In contrast, in the well-studied case of A/B/A-B mixtures, 9 vol % of the A-B diblock copolymer is needed to obtain organized microphases in a 50/50 A/B mixture. Self-consistent-field theory (SCFT) calculations, using independently determined Flory-Huggins interaction parameters and statistical segment lengths, predicted the size of the organized microphases within 10% of the experimental value for most temperatures and concentrations of diblock copolymer. The theoretically predicted phase boundary between organized microphases and macrophase separation was in good agreement with experiments.
C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Environm Energy Technol, Berkeley, CA 94720 USA.
   ExxonMobil Res & Engn Co, Annandale, NJ 08801 USA.
RP Balsara, NP (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
NR 69
TC 10
Z9 10
U1 0
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD FEB 20
PY 2007
VL 40
IS 4
BP 1207
EP 1217
DI 10.1021/ma0612677
PG 11
WC Polymer Science
SC Polymer Science
GA 135NR
UT WOS:000244160800060
ER

PT J
AU Kilic, S
   Michalik, S
   Wang, Y
   Johnson, JK
   Enick, RM
   Beckman, EJ
AF Kilic, Sevgi
   Michalik, Stephen
   Wang, Yang
   Johnson, J. Karl
   Enick, Robert M.
   Beckman, Eric J.
TI Phase behavior of oxygen-containing polymers in CO2
SO MACROMOLECULES
LA English
DT Article
ID SUPERCRITICAL CARBON-DIOXIDE; VAN-DER-WAALS; DENSITY-FUNCTIONAL THEORY;
   MOLECULAR MODELING APPROACH; INTERMOLECULAR INTERACTION; ACCEPTOR
   COMPLEXES; DIMETHYL ETHER; AB-INITIO; SOLUBILITY; ETHANE
AB The cloud point curves of a series of oxygen-containing polymers in CO2 were measured to attempt to deduce the effect of oxygen functional groups within a polymer on the polymer/CO2 phase behavior. The addition of an ether oxygen to a hydrocarbon polymer, either in the backbone or the side chain, enhances "CO2-philicity" by providing sites for specific interactions with CO2 as well as by enhancing the entropy of mixing by creating more flexible chains with higher free volume. Ab initio calculations show that both ether and ester oxygens provide very attractive interaction sites for CO2 molecules. The binding energy for an isolated ether oxygen with CO2 is larger in magnitude than that for a carbonyl oxygen/CO2 complex. However, acetate functionalized polymers are more CO2-soluble than polymers with only ether functionalitiespossibly because acetate functional groups contain a total of three binding modes for CO2 interactions, compared with only one for the ether functional group. Experiments clearly indicate that adding a single methylene group as a spacer between a polymer backbone and either an ether or acetate group exhibits a strong deleterious effect on phase behavior. This effect cannot be explained from our ab initio calculations.
C1 Univ Pittsburgh, Dept Chem Engn, Pittsburgh, PA 15261 USA.
   US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Beckman, EJ (reprint author), Univ Pittsburgh, Dept Chem Engn, Pittsburgh, PA 15261 USA.
EM beckman@engrng.pitt.edu
RI Johnson, Karl/E-9733-2013
OI Johnson, Karl/0000-0002-3608-8003
NR 60
TC 45
Z9 45
U1 7
U2 31
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD FEB 20
PY 2007
VL 40
IS 4
BP 1332
EP 1341
DI 10.1021/ma061422h
PG 10
WC Polymer Science
SC Polymer Science
GA 135NR
UT WOS:000244160800076
ER

PT J
AU Adiga, SP
   Brenner, DW
AF Adiga, Shashishekar P.
   Brenner, Donald W.
TI Toward designing smart nanovalves: Modeling of flow control through
   nanopores via the helix-coil transition of grafted polypeptide chains
SO MACROMOLECULES
LA English
DT Article
ID POLYMER BRUSHES; MICROPOROUS MEMBRANES; POLY(L-GLUTAMIC ACID);
   NANOFLUIDIC CHANNELS; MOLECULAR-DYNAMICS; VALVES
AB Nanopores modified with stimuli-responsive polypeptide chains offer a smart flow-control mechanism. These unique materials have potential wide-ranging applications including smart drug delivery, bioimplants, and molecular machines. Here, we develop a continuum method to analyze flow control through nanopores grafted with polypeptide chains. The helix-coil transition of the polypeptide chains triggered by pH change enables flow regulation. The conformational transition is treated within the Zimm-Bragg model to determine the monomer density profile of the grafted layer inside a nanopore as a function of pH. The Brinkman equation for flow through porous materials is then used to calculate the flow rate. The results are compared with recent experiments in which pH-responsive water permeation through a poly(L-glutamic acid) grafted nanoporous membrane is achieved. The results establish that polymer statistical mechanics combined with a continuum porous layer treatment of flow through the polypeptide grafted nanopore can be used to successfully design smart flow control systems.
C1 N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
RP Adiga, SP (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM spadiga@anl.gov; brenner@ncsu.edu
RI Adiga, Shashishekar/A-8353-2008; Brenner, Donald/D-1741-2009
NR 31
TC 18
Z9 18
U1 0
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0024-9297
J9 MACROMOLECULES
JI Macromolecules
PD FEB 20
PY 2007
VL 40
IS 4
BP 1342
EP 1348
DI 10.1021/ma0617522
PG 7
WC Polymer Science
SC Polymer Science
GA 135NR
UT WOS:000244160800077
ER

PT J
AU Reinhard, BM
   Sheikholeslami, S
   Mastroianni, A
   Alivisatos, AP
   Liphardt, J
AF Reinhard, Bjorn M.
   Sheikholeslami, Sassan
   Mastroianni, Alexander
   Alivisatos, A. Paul
   Liphardt, Jan
TI Use of plasmon coupling to reveal the dynamics of DNA bending and
   cleavage by single EcoRV restriction enzymes
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
ID DIVALENT METAL-IONS; GOLD NANOPARTICLES; OPTICAL-PROPERTIES;
   FLUORESCENCE SPECTROSCOPY; NONSPECIFIC-BINDING; ENDONUCLEASE; MOLECULES;
   HYBRIDIZATION; RECOGNITION; BIOMOLECULES
AB Pairs of Au nanoparticles have recently been proposed as "plasmon rulers" based on the dependence of their light scattering on the interparticle distance. Preliminary work has suggested that plasmon rulers can be used to measure and monitor dynamic distance changes over the 1- to 100-nm length scale in biology. Here, we substantiate that plasmon rulers can be used to measure dynamical biophysical processes by applying the ruler to a system that has been investigated extensively by using ensemble kinetic measurements: the cleavage of DNA by the restriction enzyme EcoRV. Temporal resolutions of up to 240 Hz were obtained, and the end-to-end extension of up to 1,000 individual dsDNA enzyme substrates could be simultaneously monitored for hours. The kinetic parameters extracted from our single-molecule cleavage trajectories agree well with values obtained in bulk through other methods and confirm well known features of the cleavage process, such as DNA bending before cleavage. Previously unreported dynamical information is revealed as well, for instance, the degree of softening of the DNA just before cleavage. The unlimited lifetime, high temporal resolution, and high signal/noise ratio make the plasmon ruler a unique tool for studying macromolecular assemblies and conformational changes at the single-molecule level.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Phys Biosci, Berkeley, CA 94720 USA.
   Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA.
RP Liphardt, J (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
EM liphardt@physics.berkeley.edu
RI Liphardt, Jan/A-5906-2012; Alivisatos , Paul /N-8863-2015
OI Alivisatos , Paul /0000-0001-6895-9048
NR 54
TC 195
Z9 197
U1 6
U2 53
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD FEB 20
PY 2007
VL 104
IS 8
BP 2667
EP 2672
DI 10.1073/pnas.0607826104
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 140NC
UT WOS:000244511200021
PM 17307879
ER

PT J
AU Alexander, RP
   Zhulin, IB
AF Alexander, Roger P.
   Zhulin, Igor B.
TI Evolutionary genomics reveals conserved structural determinants of
   signaling and adaptation in microbial chemoreceptors
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE chemotaxis; methyl-accepting chemotaxis protein; signal transduction
ID BACTERIAL CHEMOTAXIS; ASPARTATE RECEPTOR; CYTOPLASMIC DOMAIN;
   METHYLATION SITES; ESCHERICHIA-COLI; COILED-COIL;
   HALOBACTERIUM-SALINARUM; SEQUENCE ALIGNMENT; KINASE-ACTIVITY;
   SENSITIVITY
AB As an important model for transmembrane signaling, methyl-accepting chemotaxis proteins (MCPs) have been extensively studied by using genetic, biochemical, and structural techniques. However, details of the molecular mechanism of signaling are still not well understood. The availability of genomic information for hundreds of species enables the identification of features in protein sequences that are conserved over long evolutionary distances and thus are critically important for function. We carried out a large-scale comparative genomic analysis of the MCP signaling and adaptation domain family and identified features that appear to be critical for receptor structure and function. Based on domain length and sequence conservation, we identified seven major MCP classes and three distinct structural regions within the cytoplasmic domain: signaling, methylation, and flexible bundle subdomains. The flexible bundle subdomain, not previously recognized in MCPs, is a conserved element that appears to be important for signal transduction. Remarkably, the N- and C-terminal helical arms of the cytoplasmic domain maintain symmetry in length and register despite dramatic variation, from 24 to 64 7-aa heptads in overall domain length. Loss of symmetry is observed in some MCPs, where it is concomitant with specific changes in the sensory module. Each major MCP class has a distinct pattern of predicted methylation sites that is well supported by experimental data. Our findings indicate that signaling and adaptation functions within the MCP cytoplasmic domain are tightly coupled, and that their coevolution has contributed to the significant diversity in chemotaxis mechanisms among different organisms.
C1 Georgia Inst Technol, Sch Biol, Ctr Bioinformat & Computat Biol, Atlanta, GA 30332 USA.
   Univ Tennessee, Oak Ridge Natl Lab, Joint Inst Computat Sci, Oak Ridge, TN 37831 USA.
   Univ Tennessee, Oak Ridge Natl Lab, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37831 USA.
RP Zhulin, IB (reprint author), Georgia Inst Technol, Sch Biol, Ctr Bioinformat & Computat Biol, Atlanta, GA 30332 USA.
EM joulineib@ornl.gov
RI Alexander, Roger/A-8643-2008; Zhulin, Igor/A-2308-2012
OI Alexander, Roger/0000-0002-2967-7395; Zhulin, Igor/0000-0002-6708-5323
FU NIGMS NIH HHS [GM 72285, R01 GM072285]
NR 43
TC 118
Z9 120
U1 0
U2 11
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD FEB 20
PY 2007
VL 104
IS 8
BP 2885
EP 2890
DI 10.1073/pnas.0609359104
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 140NC
UT WOS:000244511200058
PM 17299051
ER

PT J
AU Cruz, D
   Chang, JP
   Showalter, SK
   Gelbard, F
   Manginell, RP
   Blain, MG
AF Cruz, D.
   Chang, J. P.
   Showalter, S. K.
   Gelbard, F.
   Manginell, R. P.
   Blain, M. G.
TI Microfabricated thermal conductivity detector for the micro-ChemLab (TM)
SO SENSORS AND ACTUATORS B-CHEMICAL
LA English
DT Article
DE thermal conductivity detector; mu TCD; miniature sensors; micro-ChemLab;
   boundary element algorithm
ID SENSOR; FLOW
AB This work describes the design, computational prototyping, fabrication, and characterization of a microfabricated thermal conductivity detector (mu TCD) to analyze the effluent from a micro-gas chromatograph column (mu GC) and to complement the detection efficacy of a surface acoustic wave detector in the micro-ChemLab (TM) system. To maximize the detection sensitivity, we designed a four-filament Wheatstone bridge circuit where the resistors are suspended by a thin silicon nitride membrane in pyramidal or trapezoidal shaped flow cells. The geometry optimization was carried out by simulation of the heat transfer in the devices, utilizing a boundary element algorithm. Within microfabrication constraints, we determined and fabricated nine sensitivity-optimized geometries of the RTCD. The nine optimal geometries were tested with two different flow patterns. We demonstrated that the perpendicular flow, where the gas directly impinged upon the membrane, yielded a sensitivity that is three times greater than the parallel flow, where the gas passed over the membrane. The functionality of the RTCD was validated with the theoretical prediction and showed a consistent linear response to effluent concentrations, with a detection sensitivity of 1 ppm, utilizing less than 1 W of power. (c) 2006 Elsevier B.V. All rights reserved.
C1 Sandia Natl Labs, Albuquerque, NM 87185 USA.
   Univ Calif Los Angeles, Dept Chem & Biomol Engn, Los Angeles, CA 90095 USA.
RP Showalter, SK (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM skshowa@sandia.gov
NR 20
TC 46
Z9 46
U1 2
U2 26
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0925-4005
J9 SENSOR ACTUAT B-CHEM
JI Sens. Actuator B-Chem.
PD FEB 20
PY 2007
VL 121
IS 2
BP 414
EP 422
DI 10.1016/j.snb.2006.04.107
PG 9
WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
SC Chemistry; Electrochemistry; Instruments & Instrumentation
GA 140ZI
UT WOS:000244545100010
ER

PT J
AU Nicolosi, V
   Nellist, PD
   Sanvito, S
   Cosgriff, EC
   Krishnamurthy, S
   Blau, WJ
   Green, MLH
   Vengust, D
   Dvorsek, D
   Mihailovic, D
   Compagnini, G
   Sloan, J
   Stolojan, V
   Carey, JD
   Pennycook, SJ
   Coleman, JN
AF Nicolosi, Valeria
   Nellist, Peter D.
   Sanvito, Stefano
   Cosgriff, Eireann C.
   Krishnamurthy, Satheesh
   Blau, Werner J.
   Green, Malcolm L. H.
   Vengust, Damjan
   Dvorsek, Damjan
   Mihailovic, Dragan
   Compagnini, Giuseppe
   Sloan, Jeremy
   Stolojan, Vlad
   Carey, J. David
   Pennycook, Stephen J.
   Coleman, Jonathan N.
TI Observation of van der Waals driven self-assembly of MoSI nanowires into
   a low-symmetry structure using aberration-corrected electron microscopy
SO ADVANCED MATERIALS
LA English
DT Article
ID MO6S4.5I4.5 NANOWIRES; MO6S3I6 NANOWIRES; SOLUBILITY; NANOTUBES;
   CLUSTERS
AB The packing structure of bundled MoSI nanowires is investigated. Scanning and high-resolution transmission electron microscopy are used to determine both the nanowire structure and bundle superstructure. Shown is a high-resolution microscopy image of a small bundle. The image width is 8 nm. It is found that the nanowires pack in crystalline bundles defined by the P (1) over bar (#2) spacegroup.
C1 Dublin City Univ, Trinity Coll, Sch Phys, Dublin 2, Ireland.
   Oak Ridge Natl Lab, Condensed Matter Div, Oak Ridge, TN 37831 USA.
   Univ Oxford, Inorgan Chem Lab, Oxford OX1 3QR, England.
   Jozef Stefan Inst, Ljubljana 1000, Slovenia.
   Univ Catania, Dept Chem, I-95125 Catania, Italy.
   Univ Surrey, Adv Technol Inst, Guildford GU2 7XH, Surrey, England.
RP Nellist, PD (reprint author), Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England.
EM peter.nellist@materials.ox.ac.uk; sanvitos@tcd.ie; colemaj@tcd.ie
RI Krishnamurthy, Satheesh/C-6347-2009; Coleman, Jonathan/B-8403-2011;
   Blau, Werner/A-4440-2008; Sloan, Jeremy/C-7144-2009; Compagnini,
   Giuseppe/B-1144-2010; Carey, J/M-3937-2014; Stolojan, Vlad/F-1588-2010; 
OI Sloan, Jeremy/0000-0001-8612-7456; Carey, J/0000-0001-8882-2014;
   Stolojan, Vlad/0000-0003-1137-4043; Coleman,
   Jonathan/0000-0001-9659-9721; Blau, Werner/0000-0002-9666-7058
FU Engineering and Physical Sciences Research Council [EP/E500293/1]
NR 29
TC 32
Z9 32
U1 0
U2 11
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY
SN 0935-9648
J9 ADV MATER
JI Adv. Mater.
PD FEB 19
PY 2007
VL 19
IS 4
BP 543
EP +
DI 10.1002/adma.200601867
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 140ON
UT WOS:000244515200007
ER

PT J
AU Ashley, K
   Agrawal, A
   Cronin, J
   Tonazzi, J
   McCleskey, TM
   Burrell, AK
   Ehler, DS
AF Ashley, Kevin
   Agrawal, Anoop
   Cronin, John
   Tonazzi, Juan
   McCleskey, T. Mark
   Burrell, Anthony K.
   Ehler, Deborah S.
TI Ultra-trace determination of beryllium in occupational hygiene samples
   by ammonium bifluoride extraction and fluorescence detection using
   hydroxybenzoquinoline sulfonate
SO ANALYTICA CHIMICA ACTA
LA English
DT Article
DE air monitoring; beryllium; extraction; fluorescence; trace analysis;
   workplace
ID DISEASE; ALUMINUM; SENSOR
AB A highly sensitive molecular fluorescence method for measuring ultra-trace levels of beryllium has been previously described. The method entails extraction of beryllium workplace samples by 1% ammonium bifluoride (NH4HF2, aqueous), followed by fluorescence detection using hydroxybenzoquinoline sulfonate (HBQS). In this work, modification of the existing procedure resulted in a significant improvement in detection power, thereby enabling ultra-trace determination of beryllium in air filter and surface wipe samples. Such low detection limits may be necessary in view of expected decreases in applicable occupational exposure limits (OELs) for beryllium. Attributes of the modified NH4HF2 extraction/HBQS fluorescence method include method detection limits (MDLs) of < 0.8 ng to approximate to 2 ng Be per sample (depending on the fluorometer used), quantitative recoveries from beryllium oxide, a dynamic range of several orders of magnitude, and freedom from interferences. Other key advantages of the technique are field portability, relatively low cost, and high sample throughput. The method performance compares favorably with that of inductively coupled plasma-mass spectrometry (ICP-MS). (c) 2006 Elsevier B.V. All rights reserved.
C1 NIOSH, US Dept HHS, Ctr Dis Control & Prevent, Cincinnati, OH 45226 USA.
   Berylliant Inc, Tucson, AZ 85712 USA.
   Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Ashley, K (reprint author), NIOSH, US Dept HHS, Ctr Dis Control & Prevent, 4676 Columbia Pkwy,MS R-7, Cincinnati, OH 45226 USA.
EM kashley@cdc.gov
RI Ashley, Kevin/C-9005-2011; McCleskey, Thomas/J-4772-2012; 
OI Mccleskey, Thomas/0000-0003-3750-3245
NR 31
TC 21
Z9 21
U1 1
U2 9
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0003-2670
J9 ANAL CHIM ACTA
JI Anal. Chim. Acta
PD FEB 19
PY 2007
VL 584
IS 2
BP 281
EP 286
DI 10.1016/j.aca.2006.11.066
PG 6
WC Chemistry, Analytical
SC Chemistry
GA 138TR
UT WOS:000244386000007
PM 17386616
ER

PT J
AU Hu, SY
   Baskes, MI
   Stan, M
AF Hu, S. Y.
   Baskes, M. I.
   Stan, M.
TI Phase-field modeling of microvoid evolution under elastic-plastic
   deformation
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID DISLOCATION; TRANSFORMATIONS; MICROSTRUCTURES; SIMULATION
AB Plastic deformation reduces the local stress concentration and changes the interface coherency in a coherent microstructure. Therefore, it may affect the morphology and evolution kinetics of a microstructure. In this work, a very efficient method has been proposed to obtain the elastic-plastic solution in an elastically inhomogeneous solid. A phase-field model integrating this method has been developed to study the microvoid evolution with vacancy diffusion under elastic-plastic deformation. It is able to demonstrate the formation of slip bands around voids and to predict the effect of plastic deformations and the elastic interaction between vacancy diffusion and deformation on the void evolution and stress-strain curves. (c) 2007 American Institute of Physics.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Hu, SY (reprint author), Los Alamos Natl Lab, MST-8, Los Alamos, NM 87545 USA.
EM syhu@lanl.gov
OI HU, Shenyang/0000-0002-7187-3082
NR 18
TC 13
Z9 13
U1 0
U2 21
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 19
PY 2007
VL 90
IS 8
AR 081921
DI 10.1063/1.2709908
PG 3
WC Physics, Applied
SC Physics
GA 139GP
UT WOS:000244420600036
ER

PT J
AU Robinson, DB
   Funamura, JR
   Talin, AA
   Anderson, RJ
AF Robinson, David B.
   Funamura, Joshua R.
   Talin, A. Alec
   Anderson, Richard J.
TI Spectroscopic observation of chemical change during molecular
   electronics experiments
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ENHANCED RAMAN-SCATTERING; SELF-ASSEMBLED MONOLAYERS; GOLD
   NANOPARTICLES; CHARGE-TRANSPORT; METAL; SILVER; FILMS; CONDUCTANCE;
   SURFACES; SIZE
AB A molecular electronics test platform is presented that combines spectroscopic and electrical characterizations of test molecules. Two-dimensional arrays of 12 nm gold particles are formed between the gaps of addressable interdigitated electrodes on an oxidized silicon substrate. Molecules of interest are introduced onto the self-assembled Au nanoparticles by surface exchange in an ethanol solution. Conductivity changes of four to six orders of magnitude are observed. Molecular exchange is verified by the surface-enhanced Raman spectroscopy on the same test specimen. This technique also reveals real-time, irreversible voltage-induced chemical change during testing. (c) 2007 American Institute of Physics.
C1 Sandia Natl Labs, Livermore, CA 94551 USA.
RP Robinson, DB (reprint author), Sandia Natl Labs, POB 969, Livermore, CA 94551 USA.
EM drobins@sandia.gov
NR 33
TC 5
Z9 5
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 19
PY 2007
VL 90
IS 8
AR 083119
DI 10.1063/1.2696804
PG 3
WC Physics, Applied
SC Physics
GA 139GP
UT WOS:000244420600085
ER

PT J
AU Young, DL
   Stradins, P
   Xu, YQ
   Gedvilas, LM
   Iwaniczko, E
   Yan, YF
   Branz, HM
   Wang, Q
   Williamson, DL
AF Young, David L.
   Stradins, Paul
   Xu, Yueqin
   Gedvilas, Lynn M.
   Iwaniczko, Eugene
   Yan, Yanfa
   Branz, Howard M.
   Wang, Qi
   Williamson, Don L.
TI Nanostructure evolution in hydrogenated amorphous silicon during
   hydrogen effusion and crystallization
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID A-SI-H; GAS-BUBBLES; FILMS
AB The authors report a study by small-angle x-ray scattering (SAXS) and tilting SAXS of nanovoids in amorphous silicon films undergoing solid phase crystallization (SPC) by annealing. SPC causes nanovoids in hot-wire chemical vapor deposited (HWCVD) amorphous Si films to decrease in total void fraction but increase in individual void volume. During annealing, the voids also change shape from prolate spheroids to more spherical geometries. Preexisting, large H clusters in as-deposited HWCVD films may provide favorable sites for void expansion driven by H-2 pressure, while energy minimization and strain relaxation drive geometric changes. (c) 2007 American Institute of Physics.
C1 Natl Renewable Energy Lab, Golden, CO 80401 USA.
   Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
RP Young, DL (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA.
EM david_young@nrel.gov
NR 14
TC 8
Z9 8
U1 1
U2 11
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD FEB 19
PY 2007
VL 90
IS 8
AR 081923
DI 10.1063/1.2435959
PG 3
WC Physics, Applied
SC Physics
GA 139GP
UT WOS:000244420600038
ER

PT J
AU Panzarella, B
   Tompsett, G
   Conner, WC
   Jones, K
AF Panzarella, Bernard
   Tompsett, Geoffrey
   Conner, William C.
   Jones, Keith
TI In situ SAXS/WAXS of zeolite microwave synthesis: NaY, NaA, and beta
   zeolites
SO CHEMPHYSCHEM
LA English
DT Article
DE crystal growth; microwaves; nanostructures; X-ray scattering; zeolites
ID RAY-POWDER DIFFRACTION; SMALL-ANGLE SCATTERING; HYDROTHERMAL SYNTHESIS;
   CRYSTALLIZATION; GROWTH; TRANSFORMATION; NUCLEATION; HYDROXYSODALITE;
   PRECURSORS; GELS
AB A custom waveguide apparatus is constructed to study the microwave synthesis of zeolites by in situ small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS). The WR-284 waveguide is used to heat precursor solutions using microwaves at a frequency of 2.45 GHz. The reaction vessels are designed to include sections of thin-walled glass, which permit X-rays to pass through the precursor solutions with minimal attenuation. Slots were machined into the waveguide to provide windows for X-ray energy to enter and scatter from solutions during microwave heating. The synthesis of zeolites with conventional heating is also studied using X-ray scattering in the some reactor. SAXS studies show that the crystallization of beta zeolite and NaY zeolite is preceded by a reorganization of nonosized particles in their precursor solutions or gels. The evolution of these particles during the nucleation and crystallization stages of zeolite formation depends on the properties of the precursor solution. The synthesis of NaA and NaX zeolites and sodalite from a single zeolite precursor is studied by microwave and conventional heating. Microwave heating shifts the selectivity of this synthesis in favor of NaA and NaX over sodalite; conventional heating leads to the formation of socialite for synthesis from the same precursor. The use of microwave heating also led to a more rapid onset of NaA zeolite product crystallization compared to conventional heating. Pulsed and continuous microwave heating are compared for zeolite synthesis. The resulting rates of formation of the zeolite products, and the relative amounts of the products determined from the WAXS spectra, are similar when either pulsed or continuous microwave heating is applied in the reactor while maintaining the some synthesis temperature. The consequences of these results in terms of zeolite synthesis ore discussed.
C1 Univ Massachusetts, Dept Chem Engn, Amherst, MA 01003 USA.
   Brookhaven Natl Lab, Environm Sci Dept, Upton, NY 11973 USA.
RP Conner, WC (reprint author), Univ Massachusetts, Dept Chem Engn, 159 Goessmann Lab, Amherst, MA 01003 USA.
EM wconner@ecs.umass.edu
NR 44
TC 15
Z9 15
U1 2
U2 15
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 1439-4235
J9 CHEMPHYSCHEM
JI ChemPhysChem
PD FEB 19
PY 2007
VL 8
IS 3
BP 357
EP 369
DI 10.1002/cphp.200600496
PG 13
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 140HT
UT WOS:000244496200002
PM 17253593
ER

PT J
AU Celestian, AJ
   Parise, JB
   Smith, RI
   Toby, BH
   Clearfield, A
AF Celestian, Aaron J.
   Parise, John B.
   Smith, Ronald I.
   Toby, Brian H.
   Clearfield, Abraham
TI Role of the hydroxyl-water hydrogen-bond network in structural
   transitions and selectivity toward cesium in Cs-0.38(D1.08H0.54)SiTi2O7
   center dot(D0.86H0.14)(2)O crystalline silicotitanate
SO INORGANIC CHEMISTRY
LA English
DT Article
ID ION-EXCHANGE PROPERTIES; NEUTRON POWDER DIFFRACTION; SODIUM TITANIUM
   SILICATE; SYNCHROTRON X-RAY; HIGH-LEVEL WASTE; POROUS TITANOSILICATE;
   SITINAKITE TOPOLOGY; STRONTIUM; REMOVAL; NA
AB The crystal structure of the selective Cs+ ion exchanger D1.6H0.4Ti2SiO7 center dot D2.66H0.34O1.5, known as crystalline silicotitanate or CST, has been determined in both native (D-CST) and in the Cs+-exchanged forms ((Cs, D)-CST) from angle-dispersive and time-of-flight neutron diffraction studies. The final fully exchange Cs+ form transformed from D-CST with unit cell parameters a = 11.0704(3) A c = 11.8917(5) A and space group P4(2)/mbc, to one with a = 7.8902(1) A c = 11.9051(4) A and space group P4(2)/mcm. Rietveld structure refinements of both D-CST and (Cs, D)-CST suggest the transition, and ultimately the selectivity, is driven by changes in the positions of water molecules, in response to the initial introduction of Cs+. The changes in water position appear to disrupt the D-O-O-D dihedral associated with the CST framework in space group P4(2)/mbc which ultimately leads to the structural transition. The new geometric arrangement of the water-deuteroxyl network in (Cs, D)-CST suggests that D-water-D-deuteroxyl repulsion forced by Cs+ exchange drives the structural transformation.
C1 SUNY Stony Brook, Dept Geosci, Ctr Environm & Mol Sci, Stony Brook, NY 11794 USA.
   Rutherford Appleton Lab, ISIS Neutron Facil, Didcot OX11 0QX, Oxon, England.
   Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Texas A&M Univ, Dept Chem, College Stn, TX 77843 USA.
RP Celestian, AJ (reprint author), SUNY Stony Brook, Dept Geosci, Ctr Environm & Mol Sci, Stony Brook, NY 11794 USA.
EM aaron.celestian@gmail.com
RI Toby, Brian/F-3176-2013; Clearfield, Abraham/D-4184-2015
OI Toby, Brian/0000-0001-8793-8285; Clearfield, Abraham/0000-0001-8318-8122
NR 36
TC 15
Z9 15
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD FEB 19
PY 2007
VL 46
IS 4
BP 1081
EP 1089
DI 10.1021/ic0611387
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 134YB
UT WOS:000244119300011
PM 17291108
ER

PT J
AU Redin, K
   Wilson, AD
   Newell, R
   DuBois, MR
   DuBois, DL
AF Redin, Kendra
   Wilson, Aaron D.
   Newell, Rachel
   DuBois, M. Rakowski
   DuBois, Daniel L.
TI Studies of structural effects on the half-wave potentials of mononuclear
   and dinuclear nickel(II) diphosphine/dithiolate complexes
SO INORGANIC CHEMISTRY
LA English
DT Article
ID HYDRIDE DONOR ABILITIES; COENZYME-A SYNTHASE; X-RAY-STRUCTURE; THIOLATE
   COMPLEXES; ACTIVE-SITE; MONOXIDE DEHYDROGENASE; DITERTIARY PHOSPHINES;
   PROTON-TRANSFER; COA SYNTHASE; NI
AB Two series of mononuclear Ni(II) complexes of the formula (PNP)Ni(dithiolate) where PNP = R2PCH2N(CH3)CH2PR2, R = Et and Ph, have been synthesized containing dithiolate ligands that vary from five- to seven-membered chelate rings. Two series of dinuclear Ni(II) complexes of the formula {[(diphosphine)Ni](2)(dithiolate)}(X)(2) (X = BF4 or PF6) have been synthesized in which the chelate ring size of the dithiolate and diphosphine ligands have been systematically varied. The structures of the alkylated mononuclear complex, [(PNPEt)Ni(SC2H4SMe)]OTf, and the dinuclear complex, [(dppeNi)(2)(SC3H6S)](BF4)(2), have been determined by X-ray diffraction studies. The complexes have been studied by cyclic voltammetry to determine how the half-wave potentials of the Ni(II/I) couples vary with chelate ring size of the ligands. For the mononuclear complexes, this potential becomes more positive as the natural bite angle of the dithiolate ligand increases. However, the potentials of the Ni(II/I) couples of the dinuclear complexes do not show a dependence on the chelate ring size of the ligands. Other aspects of the reduction chemistry of these complexes have been explored.
C1 Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA.
   Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
RP DuBois, DL (reprint author), Univ Colorado, Dept Chem & Biochem, Campus Box 215, Boulder, CO 80309 USA.
EM daniel.dubois@pnl.gov
RI Wilson, Aaron/C-4364-2008
OI Wilson, Aaron/0000-0001-5865-6537
NR 48
TC 20
Z9 20
U1 0
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD FEB 19
PY 2007
VL 46
IS 4
BP 1268
EP 1276
DI 10.1021/ic061740x
PG 9
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 134YB
UT WOS:000244119300031
PM 17249658
ER

PT J
AU Hindson, BJ
   Francis, PS
   Purcell, SD
   Barnett, NW
AF Hindson, Benjamin J.
   Francis, Paul S.
   Purcell, Stuart D.
   Barnett, Neil W.
TI Determination of opiate alkaloids in process liquors using capillary
   electrophoresis
SO JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
LA English
DT Article
DE Papaver somniferum alkaloids; morphine; codeine; cyclodextrins
ID PERMANGANATE CHEMILUMINESCENCE DETECTION; DYNAMICALLY COATED
   CAPILLARIES; SHORT-END INJECTION; ZONE-ELECTROPHORESIS;
   BETA-CYCLODEXTRIN; HUMAN URINE; MASS-SPECTROMETRY; OPIUM-ALKALOIDS;
   MORPHINE; SEPARATION
AB This paper describes the determination of opiate alkaloids (morphine, codeine, oripavine and thebaine) in industrial process liquors using capillary zone electrophoresis with UV-absorption detection at 214 nm. A study of cyclodextrin type and concentration revealed that the addition of 30 mM hydroxypropyl-beta-cyclodextrin to the electrolyte solution (100 mM Tris adjusted to pH 2.8) was suitable to resolve the four analytes of interest. Typical analysis time was 12 min and the limit of detection for each alkaloid was 2.5 x 10(-6) M. The results for the proposed methodology were in good agreement with those of a conventional HPLC procedure. Under the same conditions, short-end injection was used to reduce the effective separation length from 41.5 to 8.5 cm, which allowed the determination of morphine and thebaine in process liquors within 2.5 min. (c) 2006 Elsevier B.V. All rights reserved.
C1 Deakin Univ, Sch Life & Environm Sci, Geelong, Vic 3217, Australia.
   Lawrence Livermore Natl Lab, Livermore, CA 94551 USA.
   GlaxoSmithKline Australia, Port Fairy, Vic 3284, Australia.
RP Barnett, NW (reprint author), Deakin Univ, Sch Life & Environm Sci, Geelong, Vic 3217, Australia.
EM barnie@deakin.edu.au
RI Francis, Paul/B-7112-2008
OI Francis, Paul/0000-0003-4165-6922
NR 28
TC 21
Z9 22
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0731-7085
J9 J PHARMACEUT BIOMED
JI J. Pharm. Biomed. Anal.
PD FEB 19
PY 2007
VL 43
IS 3
BP 1164
EP 1168
DI 10.1016/j.jpba.2006.09.040
PG 5
WC Chemistry, Analytical; Pharmacology & Pharmacy
SC Chemistry; Pharmacology & Pharmacy
GA 142BG
UT WOS:000244623000052
PM 17097256
ER

PT J
AU Padilla, WJ
AF Padilla, Willie J.
TI Group theoretical description of artificial electromagnetic
   metamaterials
SO OPTICS EXPRESS
LA English
DT Article
ID MAGNETIC-RESONANCE; FREQUENCIES
AB Point group theoretical methods are used to determine the electromagnetic properties of metamaterials, based solely upon the symmetries of the underlying constituent particles. From the transformation properties of an electromagnetic ( EM) basis under symmetries of the particles, it is possible to determine, ( i) the EM modes of the particles, ( ii) the form of constitutive relations ( iii) magneto-optical response of a metamaterial or lack thereof. Based upon these methods, we predict an ideal planar artificial magnetic metamaterial, and determine the subset of point groups of which particles must belong to in order to yield an isotropic 3D magnetic response, and we show an example. (c) 2007 Optical Society of America.
C1 Los Alamos Natl Lab, CINT, MPA, Los Alamos, NM 87545 USA.
RP Padilla, WJ (reprint author), Boston Coll, Dept Phys, 140 Commonwealth Ave, Chestnut Hill, MA 02467 USA.
EM willie.padilla@bc.edu
RI Padilla, Willie/A-7235-2008
OI Padilla, Willie/0000-0001-7734-8847
NR 25
TC 55
Z9 55
U1 0
U2 9
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD FEB 19
PY 2007
VL 15
IS 4
BP 1639
EP 1646
DI 10.1364/OE.15.001639
PG 8
WC Optics
SC Optics
GA 142WV
UT WOS:000244682500029
PM 19532398
ER

PT J
AU Lee, C
   Schwab, DJ
   Beletsky, D
   Stroud, J
   Lesht, B
AF Lee, Cheegwan
   Schwab, David J.
   Beletsky, Dmitry
   Stroud, Jonathan
   Lesht, Barry
TI Numerical modeling of mixed sediment resuspension, transport, and
   deposition during the March 1998 episodic events in southern Lake
   Michigan
SO JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
LA English
DT Article
ID WAVE PREDICTION MODEL; CIRCULATION; DYNAMICS; CURRENTS; FLOW; BED
AB [ 1] A two-dimensional sediment transport model capable of simulating sediment resuspension of mixed ( cohesive plus noncohesive) sediment is developed and applied to quantitatively simulate the March 1998 resuspension events in southern Lake Michigan. Some characteristics of the model are the capability to incorporate several floc size classes, a physically based settling velocity formula, bed armoring, and sediment availability limitation. Important resuspension parameters were estimated from field and laboratory measurement data. The model reproduced the resuspension plume ( observed by the SeaWIFS satellite and field instruments) and recently measured sedimentation rate distribution ( using radiotracer techniques) fairly well. Model results were verified with field measurements of suspended sediment concentration and settling flux ( by ADCPs and sediment traps). Both wave conditions and sediment bed properties ( critical shear stress, fine sediment fraction, and limited sediment availability or source) are the critical factors that determine the concentration distribution and width of the resuspension plume. The modeled sedimentation pattern shows preferential accumulation of sediment on the eastern side of the lake, which agrees with the observed sedimentation pattern despite a predominance of particle sources from the western shoreline. The main physical mechanisms determining the sedimentation pattern are ( 1) the two counter-rotating circulation gyres producing offshore mass transport along the southeastern coast during northerly wind and ( 2) the settling velocity of sediment flocs which controls the deposition location.
C1 Pacific NW Natl Lab Battelle, Marine Sci Lab, Seattle, WA 98109 USA.
   Univ Michigan, SNRE, CILER, Ann Arbor, MI 48105 USA.
   NOAA, Great Lakes Environm Res Lab, Ann Arbor, MI 48105 USA.
   Univ Penn, Dept Stat, Philadelphia, PA 19104 USA.
   Argonne Natl Lab, Argonne, IL 60439 USA.
RP Lee, C (reprint author), Pacific NW Natl Lab Battelle, Marine Sci Lab, Seattle, WA 98109 USA.
EM leecheeg@battelle.org
RI Schwab, David/B-7498-2012; 
OI Lesht, Barry/0000-0003-0801-4290; Beletsky, Dmitry/0000-0003-4532-0588
NR 47
TC 14
Z9 16
U1 2
U2 7
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9275
J9 J GEOPHYS RES-OCEANS
JI J. Geophys. Res.-Oceans
PD FEB 17
PY 2007
VL 112
IS C2
AR C02018
DI 10.1029/2005JC003419
PG 17
WC Oceanography
SC Oceanography
GA 138NT
UT WOS:000244370100001
ER

PT J
AU Burnett, JC
   Ruthel, G
   Stegmann, CM
   Panchal, RG
   Nguyen, TL
   Hermone, AR
   Stafford, RG
   Lane, DJ
   Kenny, TA
   McGrath, CF
   Wipf, P
   Stahl, AM
   Schmidt, JJ
   Gussio, R
   Brunger, AT
   Bavari, S
AF Burnett, James C.
   Ruthel, Gordon
   Stegmann, Christian M.
   Panchal, Rekha G.
   Nguyen, Tam L.
   Hermone, Ann R.
   Stafford, Robert G.
   Lane, Douglas J.
   Kenny, Tara A.
   McGrath, Connor F.
   Wipf, Peter
   Stahl, Andrea M.
   Schmidt, James J.
   Gussio, Rick
   Brunger, Axel T.
   Bavari, Sina
TI Inhibition of metalloprotease botulinum serotype A from a pseudo-peptide
   binding mode to a small molecule that is active in primary neurons
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID TOXIN TYPE-A; NEUROTOXIN SEROTYPE; ZINC ENDOPEPTIDASE; NEUROTRANSMITTER
   RELEASE; COMMON PHARMACOPHORE; CRYSTAL-STRUCTURE; PROTEASE ACTIVITY;
   POISONOUS POISON; IDENTIFICATION; PROTEINS
AB An efficient research strategy integrating empirically guided, structure-based modeling and chemoinformatics was used to discover potent small molecule inhibitors of the botulinum neurotoxin serotype A light chain. First, a modeled binding mode for inhibitor 2-mercapto-3-phenylpropionyl-RATKML (K-i = 330 nM) was generated, and required the use of a molecular dynamic conformer of the enzyme displaying the reorientation of surface loops bordering the substrate binding cleft. These flexible loops are conformationally variable in x-ray crystal structures, and the model predicted that they were pivotal for providing complementary binding surfaces and solvent shielding for the pseudo-peptide. The docked conformation of 2-mercapto-3-phenylpropionyl-RATKML was then used to refine our pharmacophore for botulinum serotype A light chain inhibition. Data base search queries derived from the pharmacophore were employed to mine small molecule (non-peptidic) inhibitors from the National Cancer Institute's Open Repository. Four of the inhibitors possess K, values ranging from 3.0 to 10.0 mu m. Of these, NSC 240898 is a promising lead for therapeutic development, as it readily enters neurons, exhibits no neuronal toxicity, and elicits dose-dependent protection of synaptosomal-associated protein (of 25 kDa) in a primary culture of embryonic chicken neurons. Isothermal titration calorimetry showed that the interaction between NSC 240898 and the botulinum A light chain is largely entropy-driven, and occurs with a 1:1 stoichiometry and a dissociation constant of 4.6 mu M.
C1 Stanford Univ, Sch Med, HHMI, Stanford, CA 94305 USA.
   Stanford Univ, Sch Med, Dept Cellular & Mol Physiol, Stanford, CA 94305 USA.
   Stanford Univ, Sch Med, Dept Neurol & Neurol Sci, Stanford, CA 94305 USA.
   Stanford Univ, Sch Med, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA.
   NCI Frederick, Informat Technol Branch, Dev Therapeut Program, Ft Detrick, MD 21702 USA.
   USA, Med Res Inst Infect Dis, Ft Detrick, MD 21702 USA.
   SAIC Frederick, Target Struct Based Drug Discovery Grp, Frederick, MD USA.
   Univ Pittsburgh, Combinatorial Chem Ctr, Pittsburgh, PA 15260 USA.
RP Brunger, AT (reprint author), Stanford Univ, Sch Med, HHMI, 318 Campus Dr,Rm E300, Stanford, CA 94305 USA.
EM brunger@stanford.edu; sina.bavari@us.army.mil
OI Brunger, Axel/0000-0001-5121-2036
NR 46
TC 50
Z9 50
U1 0
U2 3
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD FEB 16
PY 2007
VL 282
IS 7
BP 5004
EP 5014
DI 10.1074/jbc.M608166200
PG 11
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA 140CX
UT WOS:000244482000083
ER

PT J
AU Shalliker, RA
   Catchpoole, HJ
   Dennis, GR
   Guiochon, G
AF Shalliker, R. Andrew
   Catchpoole, Heather J.
   Dennis, Gary R.
   Guiochon, Georges
TI Visualising viscous fingering in chromatography columns: High viscosity
   solute plug
SO JOURNAL OF CHROMATOGRAPHY A
LA English
DT Article; Proceedings Paper
CT 19th International Symposium on Preparative and Process Chromatography
CY MAY 14-17, 2006
CL Baltimore, MD
DE viscous fingering; packed beds; visualisation
ID SIZE-EXCLUSION CHROMATOGRAPHY; LIQUID-CHROMATOGRAPHY; DESIGN
AB The interface between two fluids that have different viscosities and are percolating through a porous bed is unstable. Sooner or later, a flow instability termed viscous fingering (VF) develops. This phenomenon is important in chromatography because the solute plug does not have the same viscosity as the mobile phase. Because the sample is often much more viscous than the mobile phase, it is the interface at the rear of the sample band that is usually unstable. This situation is frequent in many modes of chromatography, e.g., in preparative and in multidimensional chromatography, in size exclusion chromatography, in frontal analysis. and in other physicochemical measurements (e.g., determination of adsorption isotherms and of mass transfer parameters). When the solute plug is more viscous than the mobile phase, we observed that the solute band compressed. When the viscosity contrast increased up to 0.30 cP, fingers appeared to trail behind the solute plug. The development of fingers then became more substantial as the viscosity contrast increased. To avoid effects associated with VF, the mobile phase and the solute plug should have nearly the same viscosity. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Western Sydney, Nanoscale Org & Dynam Grp, Sydney, NSW, Australia.
   Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN USA.
RP Shalliker, RA (reprint author), Univ Western Sydney, Nanoscale Org & Dynam Grp, Sydney, NSW, Australia.
EM r.shalliker@uws.edu.au
NR 11
TC 39
Z9 41
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0021-9673
J9 J CHROMATOGR A
JI J. Chromatogr. A
PD FEB 16
PY 2007
VL 1142
IS 1
BP 48
EP 55
DI 10.1016/j.chroma.2006.09.059
PG 8
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA 140KR
UT WOS:000244504400007
PM 17030036
ER

PT J
AU Stone, MB
   Broholm, C
   Reich, DH
   Schiffer, P
   Tchernyshyov, O
   Vorderwisch, P
   Harrison, N
AF Stone, M. B.
   Broholm, C.
   Reich, D. H.
   Schiffer, P.
   Tchernyshyov, O.
   Vorderwisch, P.
   Harrison, N.
TI Field-driven phase transitions in a quasi-two-dimensional quantum
   antiferromagnet
SO NEW JOURNAL OF PHYSICS
LA English
DT Article
ID BOSE-EINSTEIN CONDENSATION; SINGLET GROUND-STATE; MAGNETIC-FIELD;
   HEISENBERG-MODEL; SPIN-GAP; NEUTRON-SCATTERING; CRITICAL-BEHAVIOR;
   LINEAR-CHAIN; TLCUCL3; SYSTEMS
AB We report magnetic susceptibility, specific heat, and neutron scattering measurements as a function of applied magnetic field and temperature to characterize the S = 1/2 quasi-two-dimensional (2D) frustrated magnet piperazinium hexachlorodicuprate (PHCC). The experiments reveal four distinct phases. At low temperatures and fields the material forms a quantum paramagnet with a 1 meV singlet triplet gap and a magnon bandwidth of 1.7 meV. The singlet state involves multiple spin pairs some of which have negative ground state bond energies. Increasing the field at low temperatures induces 3D long-range antiferromagnetic order at 7.5 Tesla through a continuous phase transition that can be described as magnon Bose-Einstein condensation. The phase transition to a fully polarized ferromagnetic state occurs at 37 Tesla. The ordered antiferromagnetic phase is surrounded by a renormalized classical region. The crossover to this phase from the quantum paramagnet is marked by a distinct anomaly in the magnetic susceptibility which coincides with closure of the finite temperature singlet-triplet pseudo gap. The phase boundary between the quantum paramagnet and the Bose-Einstein condensate features a finite temperature minimum at T = 0.2 K, which may be associated with coupling to nuclear spin or lattice degrees of freedom close to quantum criticality.
C1 Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
   Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
   Penn State Univ, Dept Phys, University Pk, PA 16802 USA.
   Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
   Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany.
   Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA.
RP Stone, MB (reprint author), Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA.
EM stonemb@ornl.gov; broholm@jhu.edu
RI Broholm, Collin/E-8228-2011; Schiffer, Peter/F-3227-2011; Stone,
   Matthew/G-3275-2011; 
OI Broholm, Collin/0000-0002-1569-9892; Stone, Matthew/0000-0001-7884-9715;
   Schiffer, Peter/0000-0002-6430-6549; Harrison, Neil/0000-0001-5456-7756
NR 71
TC 26
Z9 26
U1 2
U2 12
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 1367-2630
J9 NEW J PHYS
JI New J. Phys.
PD FEB 16
PY 2007
VL 9
AR 31
DI 10.1088/1367-2630/9/2/031
PG 32
WC Physics, Multidisciplinary
SC Physics
GA 138YH
UT WOS:000244398700003
ER

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AU Abulencia, A
   Adelman, J
   Affolder, T
   Akimoto, T
   Albrow, MG
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   Anikeev, K
   Annovi, A
   Antos, J
   Aoki, M
   Apollinari, G
   Arguin, JF
   Arisawa, T
   Artikov, A
   Ashmanskas, W
   Attal, A
   Azfar, F
   Azzi-Bacchetta, P
   Azzurri, P
   Bacchetta, N
   Badgett, W
   Barbaro-Galtieri, A
   Barnes, VE
   Barnett, BA
   Baroiant, S
   Bartsch, V
   Bauer, G
   Bedeschi, F
   Behari, S
   Belforte, S
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AF Abulencia, A.
   Adelman, J.
   Affolder, T.
   Akimoto, T.
   Albrow, M. G.
   Ambrose, D.
   Amerio, S.
   Amidei, D.
   Anastassov, A.
   Anikeev, K.
   Annovi, A.
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   Aoki, M.
   Apollinari, G.
   Arguin, J. -F.
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   Attal, A.
   Azfar, F.
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   Wester, W. C., III
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   Yu, I.
   Yu, S. S.
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   Zucchelli, S.
CA CDF Collaboration
TI Search for V plus A current in top-quark decays in p(p)over-bar
   collisions root s=1.96 TeV
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PHYSICS
AB We report an upper limit on the fraction of V+A current, f(V+A), in top-quark decays, using approximately 700 pb(-1) of p (p) over bar collisions at root s=1.96 TeV acquired by the upgraded Collider Detector at Fermilab. For the decay t -> Wb ->center dot nu b (where center dot=e or mu), the invariant mass of the charged lepton and the bottom quark jet is sensitive to the polarization of the W boson. We determine f(V+A)=-0.06 +/- 0.25 given a top-quark mass of 175 GeV/c(2). We set an upper limit on f(V+A) of 0.29 at the 95% confidence level, an improvement by a factor of 2 on the previous best direct limit.
C1 Univ Illinois, Urbana, IL 61801 USA.
   Acad Sinica, Inst Phys, Taipei 11529, Taiwan.
   Argonne Natl Lab, Argonne, IL 60439 USA.
   Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain.
   Baylor Univ, Waco, TX 76798 USA.
   Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy.
   Brandeis Univ, Waltham, MA 02254 USA.
   Univ Calif Davis, Davis, CA 95616 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90024 USA.
   Univ Calif San Diego, La Jolla, CA 92093 USA.
   Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
   Univ Cantabria, Inst Fis, CSIC, E-39005 Santander, Spain.
   Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
   Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   Inst Expt Phys, Kosice, Slovakia.
   Comenius Univ, Bratislava 84248, Slovakia.
   Joint Inst Nucl Res, RU-141980 Dubna, Russia.
   Duke Univ, Durham, NC 27708 USA.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Univ Florida, Gainesville, FL 32611 USA.
   Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy.
   Univ Geneva, CH-1211 Geneva 4, Switzerland.
   Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland.
   Harvard Univ, Cambridge, MA 02138 USA.
   Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland.
   Inst Phys, FIN-00014 Helsinki, Finland.
   Johns Hopkins Univ, Baltimore, MD 21218 USA.
   Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany.
   KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan.
   Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea.
   Seoul Natl Univ, Seoul 151742, South Korea.
   Sungkyunkwan Univ, Suwon 440746, South Korea.
   Ernest Orlando Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Univ Liverpool, Liverpool L69 7ZE, Merseyside, England.
   UCL, London WC1E 6BT, England.
   CIEMAT, E-28040 Madrid, Spain.
   MIT, Cambridge, MA 02139 USA.
   McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada.
   Univ Toronto, Toronto, ON M5S 1A7, Canada.
   Univ Michigan, Ann Arbor, MI 48109 USA.
   Michigan State Univ, E Lansing, MI 48824 USA.
   Inst Theoret & Expt Phys, Moscow 117259, Russia.
   Univ New Mexico, Albuquerque, NM 87131 USA.
   Northwestern Univ, Evanston, IL 60208 USA.
   Ohio State Univ, Columbus, OH 43210 USA.
   Okayama Univ, Okayama 7008530, Japan.
   Osaka City Univ, Osaka 588, Japan.
   Univ Oxford, Oxford OX1 3RH, England.
   Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy.
   Univ Paris 06, CNRS, IN2P3, LPNHE,UMR 7585, F-75252 Paris, France.
   Univ Penn, Philadelphia, PA 19104 USA.
   Univ Pisa, Ist Nazl Fis Nucl, I-56127 Pisa, Italy.
   Scuola Normale Super Pisa, I-56127 Pisa, Italy.
   Univ Pittsburgh, Pittsburgh, PA 15260 USA.
   Purdue Univ, W Lafayette, IN 47907 USA.
   Univ Rochester, Rochester, NY 14627 USA.
   Rockefeller Univ, New York, NY 10021 USA.
   Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy.
   Rutgers State Univ, Piscataway, NJ 08855 USA.
   Texas A&M Univ, College Stn, TX 77843 USA.
   Univ Trieste, Ist Nazl Fis Nucl, Trieste, Italy.
   Univ Tsukuba, Tsukuba, Ibaraki 305, Japan.
   Tufts Univ, Medford, MA 02155 USA.
   Waseda Univ, Tokyo 169, Japan.
   Wayne State Univ, Detroit, MI 48201 USA.
   Univ Wisconsin, Madison, WI 53706 USA.
   Yale Univ, New Haven, CT 06520 USA.
RP Abulencia, A (reprint author), Univ Illinois, Urbana, IL 61801 USA.
RI Punzi, Giovanni/J-4947-2012; Azzi, Patrizia/H-5404-2012; manca,
   giulia/I-9264-2012; Prokoshin, Fedor/E-2795-2012; Warburton,
   Andreas/N-8028-2013; Canelli, Florencia/O-9693-2016; Russ,
   James/P-3092-2014; Annovi, Alberto/G-6028-2012; Robson,
   Aidan/G-1087-2011; Garcia, Jose /H-6339-2015; Cavalli-Sforza,
   Matteo/H-7102-2015; Amerio, Silvia/J-4605-2012; Lysak,
   Roman/H-2995-2014; Kim, Soo-Bong/B-7061-2014; Paulini,
   Manfred/N-7794-2014; ciocci, maria agnese /I-2153-2015; Ivanov,
   Andrew/A-7982-2013; Leonardo, Nuno/M-6940-2016; Scodellaro,
   Luca/K-9091-2014; messina, andrea/C-2753-2013; Introzzi,
   Gianluca/K-2497-2015; Ruiz, Alberto/E-4473-2011; Cabrera Urban,
   Susana/H-1376-2015; St.Denis, Richard/C-8997-2012; Gorelov,
   Igor/J-9010-2015; De Cecco, Sandro/B-1016-2012; unalan,
   zeynep/C-6660-2015; Muelmenstaedt, Johannes/K-2432-2015
OI Punzi, Giovanni/0000-0002-8346-9052; Azzi, Patrizia/0000-0002-3129-828X;
   Prokoshin, Fedor/0000-0001-6389-5399; Warburton,
   Andreas/0000-0002-2298-7315; Canelli, Florencia/0000-0001-6361-2117;
   Russ, James/0000-0001-9856-9155; Annovi, Alberto/0000-0002-4649-4398;
   Paulini, Manfred/0000-0002-6714-5787; ciocci, maria agnese
   /0000-0003-0002-5462; Ivanov, Andrew/0000-0002-9270-5643; Leonardo,
   Nuno/0000-0002-9746-4594; Scodellaro, Luca/0000-0002-4974-8330;
   Introzzi, Gianluca/0000-0002-1314-2580; Ruiz,
   Alberto/0000-0002-3639-0368; Gorelov, Igor/0000-0001-5570-0133; unalan,
   zeynep/0000-0003-2570-7611; Muelmenstaedt, Johannes/0000-0003-1105-6678
NR 25
TC 18
Z9 18
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 16
PY 2007
VL 98
IS 7
AR 072001
DI 10.1103/PhysRevLett.98.072001
PG 7
WC Physics, Multidisciplinary
SC Physics
GA 136UT
UT WOS:000244250300021
ER

PT J
AU Fernandez-Alonso, F
   Bermejo, FJ
   McLain, SE
   Turner, JFC
   Molaison, JJ
   Herwig, KW
AF Fernandez-Alonso, F.
   Bermejo, F. J.
   McLain, S. E.
   Turner, J. F. C.
   Molaison, J. J.
   Herwig, K. W.
TI Observation of fractional Stokes-Einstein behavior in the simplest
   hydrogen-bonded liquid
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATION; GLASS-TRANSITION; NEUTRON-SCATTERING;
   FLUORIDE; HF; RESOLUTION
AB Quasielastic neutron scattering has been used to investigate the single-particle dynamics of hydrogen fluoride across its entire liquid range at ambient pressure. For T > 230 K, translational diffusion obeys the celebrated Stokes-Einstein relation, in agreement with nuclear magnetic resonance studies. At lower temperatures, we find significant deviations from the above behavior in the form of a power law with exponent xi=-0.71 +/- 0.05. More striking than the above is a complete breakdown of the Debye-Stokes-Einstein relation for rotational diffusion. Our findings provide the first experimental verification of fractional Stokes-Einstein behavior in a hydrogen-bonded liquid, in agreement with recent computer simulations [S. R. Becker , Phys. Rev. Lett. 97, 055901 (2006)].
C1 Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
   Univ Basque Country, CSIC, Inst Estructura Mat, Bilbao 48080, Spain.
   Univ Basque Country, Dept Elect & Elect, Bilbao 48080, Spain.
   Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA.
RP Fernandez-Alonso, F (reprint author), Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England.
EM F.Fernandez-Alonso@rl.ac.uk; javier@langran.iem.csic.es
RI Fernandez-Alonso, Felix/C-2505-2008; Herwig, Kenneth/F-4787-2011; 
OI McLain, Sylvia/0000-0002-3347-7759
NR 31
TC 27
Z9 27
U1 0
U2 13
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 16
PY 2007
VL 98
IS 7
AR 077801
DI 10.1103/PhysRevLett.98.077801
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 136UT
UT WOS:000244250300065
PM 17359062
ER

PT J
AU Fortier, TM
   Ashby, N
   Bergquist, JC
   Delaney, MJ
   Diddams, SA
   Heavner, TP
   Hollberg, L
   Itano, WM
   Jefferts, SR
   Kim, K
   Levi, F
   Lorini, L
   Oskay, WH
   Parker, TE
   Stalnaker, JE
AF Fortier, T. M.
   Ashby, N.
   Bergquist, J. C.
   Delaney, M. J.
   Diddams, S. A.
   Heavner, T. P.
   Hollberg, L.
   Itano, W. M.
   Jefferts, S. R.
   Kim, K.
   Levi, F.
   Lorini, L.
   Oskay, W. H.
   Parker, T. E.
   Stalnaker, J. E.
TI Precision atomic spectroscopy for improved limits on variation of the
   fine structure constant and local position invariance
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FUNDAMENTAL CONSTANTS; FREQUENCY MEASUREMENTS; TIME-VARIATION; LASER;
   HG-199(+); NIST-F1
AB We report tests of local position invariance and the variation of fundamental constants from measurements of the frequency ratio of the 282-nm Hg-199(+) optical clock transition to the ground state hyperfine splitting in Cs-133. Analysis of the frequency ratio of the two clocks, extending over 6 yr at NIST, is used to place a limit on its fractional variation of < 5.8x10(-6) per change in normalized solar gravitational potential. The same frequency ratio is also used to obtain 20-fold improvement over previous limits on the fractional variation of the fine structure constant of vertical bar alpha/alpha vertical bar < 1.3x10(-16) yr(-1), assuming invariance of other fundamental constants. Comparisons of our results with those previously reported for the absolute optical frequency measurements in H and Yb-171(+) vs other Cs-133 standards yield a coupled constraint of -1.5x10(-15)<alpha/alpha < 0.4x10(-15) yr(-1) and -2.7x10(-15)< d/dt ln mu(Cs)/mu(B) < 8.6x10(-15) yr(-1).
C1 Los Alamos Natl Lab, Phys Div P23, Los Alamos, NM 87545 USA.
   Natl Inst Stand & Technol, Div Time & Frequency, Boulder, CO 80305 USA.
RP Fortier, TM (reprint author), Univ Wisconsin, Dept Phys, 1150 Univ Ave,Chamberlin Hall,Room 2320, Madison, WI 53706 USA.
EM sdiddams@boulder.nist.gov
RI Diddams, Scott/L-2819-2013
NR 27
TC 156
Z9 156
U1 2
U2 25
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 16
PY 2007
VL 98
IS 7
AR 070801
DI 10.1103/PhysRevLett.98.070801
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 136UT
UT WOS:000244250300012
PM 17359009
ER

PT J
AU Horner, DA
   Vanroose, W
   Rescigno, TN
   Martin, F
   McCurdy, CW
AF Horner, D. A.
   Vanroose, W.
   Rescigno, T. N.
   Martin, F.
   McCurdy, C. W.
TI Role of nuclear motion in double ionization of molecular hydrogen by a
   single photon
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DOUBLE PHOTOIONIZATION; DEUTERIUM; BREAKUP; H-2
AB We examine the origin of recently observed variations with internuclear distance (R) of the fully differential cross sections for double ionization of aligned H-2 by absorption of a single photon. Using the results of fully converged numerical solutions of the Schrodinger equation, we show that these variations arise primarily from pronounced differences in the R dependence of the parallel and perpendicular components of the ionization amplitude. We also predict that R dependences should be readily observable in the asymmetry parameter for photodouble ionization, even in experimental measurements that are not differential in the energy sharings between ejected photoelectrons.
C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Univ Antwerp, Dept Wiskunde Informat, B-2020 Antwerp, Belgium.
   Univ Autonoma Madrid, Dept Quim C9, E-28049 Madrid, Spain.
   Univ Calif Davis, Dept Appl Sci & Chem, Davis, CA 95616 USA.
RP Horner, DA (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RI Martin, Fernando/C-3972-2014; Vanroose, Wim/J-4292-2013
OI Martin, Fernando/0000-0002-7529-925X; Vanroose, Wim/0000-0001-8349-1391
NR 13
TC 28
Z9 28
U1 1
U2 6
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 16
PY 2007
VL 98
IS 7
AR 073001
DI 10.1103/PhysRevLett.98.073001
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 136UT
UT WOS:000244250300023
PM 17359020
ER

PT J
AU Varga, K
   Pantelides, ST
AF Varga, K.
   Pantelides, S. T.
TI Quantum transport in molecules and nanotube devices
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ELECTRON-TRANSPORT; CARBON NANOTUBE; CONDUCTANCE; FIELD
AB Quantum transport is usually cast as an "open" scattering problem, for which available computational methods have not achieved the accuracy of methods for conventional "closed" problems. Here we cast quantum transport as a closed problem and demonstrate fully converged currents for the prototype benzene-dithiolate system. We further report results for carbon-nanotube field-effect transistors, highlighting differences with Si-based devices, e.g., band mixing caused by the gate electric field. We also find that the source-drain current exhibits an intrinsic saturation as a function of the gate voltage.
C1 Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Varga, K (reprint author), Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA.
RI Varga, Kalman/A-7102-2013
NR 36
TC 45
Z9 45
U1 2
U2 12
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 16
PY 2007
VL 98
IS 7
AR 076804
DI 10.1103/PhysRevLett.98.076804
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 136UT
UT WOS:000244250300050
PM 17359047
ER

PT J
AU Weber, CP
   Orenstein, J
   Bernevig, BA
   Zhang, SC
   Stephens, J
   Awschalom, DD
AF Weber, C. P.
   Orenstein, J.
   Bernevig, B. Andrei
   Zhang, Shou-Cheng
   Stephens, Jason
   Awschalom, D. D.
TI Nondiffusive spin dynamics in a two-dimensional electron gas
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SEMICONDUCTORS
AB We describe measurements of spin dynamics in the two-dimensional electron gas in GaAs/GaAlAs quantum wells. Optical techniques, including transient spin-grating spectroscopy, are used to probe the relaxation rates of spin polarization waves in the wave vector range from zero to 6x10(4) cm(-1). We find that the spin polarization lifetime is maximal at a nonzero wave vector, in contrast with expectations based on ordinary spin diffusion, but in quantitative agreement with recent theories that treat diffusion in the presence of spin-orbit coupling.
C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA.
   Stanford Univ, Dept Phys, Stanford, CA 94305 USA.
   Univ Calif Santa Barbara, Ctr Spintron & Quatum Computat, Santa Barbara, CA 93106 USA.
RP Weber, CP (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
RI Zhang, Shou-Cheng/B-2794-2010; Orenstein, Joseph/I-3451-2015
NR 25
TC 65
Z9 66
U1 3
U2 11
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD FEB 16
PY 2007
VL 98
IS 7
AR 076604
DI 10.1103/PhysRevLett.98.076604
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 136UT
UT WOS:000244250300046
PM 17359043
ER

PT J
AU Newton, ILG
   Woyke, T
   Auchtung, TA
   Dilly, GF
   Dutton, RJ
   Fisher, MC
   Fontanez, KM
   Lau, E
   Stewart, FJ
   Richardson, PM
   Barry, KW
   Saunders, E
   Detter, JC
   Wu, D
   Eisen, JA
   Cavanaugh, CM
AF Newton, I. L. G.
   Woyke, T.
   Auchtung, T. A.
   Dilly, G. F.
   Dutton, R. J.
   Fisher, M. C.
   Fontanez, K. M.
   Lau, E.
   Stewart, F. J.
   Richardson, P. M.
   Barry, K. W.
   Saunders, E.
   Detter, J. C.
   Wu, D.
   Eisen, J. A.
   Cavanaugh, C. M.
TI The Calyptogena magnifica chemoautotrophic symbiont genome
SO SCIENCE
LA English
DT Article
ID GALAPAGOS SPREADING CENTER; HYDROTHERMAL VENT CLAM; GENE-CLUSTER;
   SULFIDE
AB Chemoautotrophic endosymbionts are the metabolic cornerstone of hydrothermal vent communities, providing invertebrate hosts with nearly all of their nutrition. The Calyptogena magnifica (Bivalvia: Vesicomyidae) symbiont, Candidatus Ruthia magnifica, is the first intracellular sulfur-oxidizing endosymbiont to have its genome sequenced, revealing a suite of metabolic capabilities. The genome encodes major chemoautotrophic pathways as well as pathways for biosynthesis of vitamins, cofactors, and all 20 amino acids required by the clam.
C1 Harvard Univ, Biolabs 4080, Cambridge, MA 02138 USA.
   Joint Genome Inst, Dept Energy, Walnut Creek, CA 94598 USA.
   Harvard Univ, Sch Med, Dept Microbiol & Mol Genet, Boston, MA 02115 USA.
   Inst Genom Res, Rockville, MD 20850 USA.
   Univ Calif Davis, Genome Ctr, Genome & Biomed Sci Facil, Davis, CA 95616 USA.
RP Cavanaugh, CM (reprint author), Harvard Univ, Biolabs 4080, 16 Divin Ave, Cambridge, MA 02138 USA.
EM cavanaug@fas.harvard.edu
OI Dilly, Geoffrey/0000-0003-2140-4955; Lau, Evan/0000-0002-7434-4362;
   Eisen, Jonathan A./0000-0002-0159-2197
NR 16
TC 98
Z9 334
U1 2
U2 21
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
J9 SCIENCE
JI Science
PD FEB 16
PY 2007
VL 315
IS 5814
BP 998
EP 1000
DI 10.1126/science.1138438
PG 3
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 136MW
UT WOS:000244229800045
PM 17303757
ER

PT J
AU Shvartsburg, AA
   Li, FM
   Tang, KQ
   Smith, RD
AF Shvartsburg, Alexandre A.
   Li, Fumin
   Tang, Keqi
   Smith, Richard D.
TI Distortion of ion structures by field asymmetric waveform ion mobility
   spectrometry
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID ESI-FAIMS-MS; ELECTROSPRAYED UBIQUITIN IONS; IONIZATION
   MASS-SPECTROMETRY; GAS-PHASE CONFORMATIONS; CYTOCHROME-C IONS;
   DRIFT-GAS; CARRIER GASES; CONFORMERS; SEPARATION; PROTEIN
AB Field asymmetric waveform ion mobility spectrometry (FAIMS) is emerging as a major analytical tool, especially in conjunction with mass spectrometry (MS), conventional ion mobility spectrometry (IMS), or both. In particular, FAIMS is used to separate protein or peptide conformers prior to characterization by IMS, MS/MS, or H/D exchange. High electric fields in FAIMS induce ion heating, previously estimated at < 10 degrees C on average and believed too weak to affect ion geometries. Here we use a FAIMS/IMS/MS system to compare the IMS spectra for ESI-generated ubiquitin ions that have and have not passed FAIMS and find that some unfolding occurs for most charge states. These data and their comparison with the reported protein unfolding in a Paul trap imply that at least some structural transitions observed in FAIMS, or previously in an ion trap, are not spontaneous. The observed unfolding is similar to that produced by heating of similar to 50 degrees C above room temperature, consistent with the calculated heating of ions at FAIMS waveform peaks. Hence, the ion isomerization in FAIMS likely proceeds in steps during the "hot" periods, especially right after entering the device. The process distorts ion geometries and causes ion losses by a "self-cleaning" mechanism and thus should be suppressed as much as possible. We propose achieving that via cooling FAIMS by the amount of ion heating; in most cases, cooling by similar to 75 degrees C should suffice.
C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA.
RP Smith, RD (reprint author), Pacific NW Natl Lab, Div Biol Sci, POB 999, Richland, WA 99352 USA.
EM rds@pnl.gov
RI Smith, Richard/J-3664-2012
OI Smith, Richard/0000-0002-2381-2349
FU NCRR NIH HHS [RR 18522]
NR 67
TC 39
Z9 39
U1 2
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD FEB 15
PY 2007
VL 79
IS 4
BP 1523
EP 1528
DI 10.1021/ac061306c
PG 6
WC Chemistry, Analytical
SC Chemistry
GA 136EV
UT WOS:000244206300032
PM 17297950
ER

PT J
AU Doran, M
   Raicu, DS
   Furst, JD
   Settimi, R
   Schipma, M
   Chandler, DP
AF Doran, M.
   Raicu, D. S.
   Furst, J. D.
   Settimi, R.
   Schipma, M.
   Chandler, D. P.
TI Oligonucleotide microarray identification of Bacillus anthracis strains
   using support vector machines
SO BIOINFORMATICS
LA English
DT Article
ID GENE-EXPRESSION; DNA
AB The capability of a custom microarray to discriminate between closely related DNA samples is demonstrated using a set of Bacillus anthracis strains. The microarray was developed as a universal fingerprint device consisting of 390 genome-independent 9mer probes. The genomes of B.anthracis strains are monomorphic and therefore, typically difficult to distinguish using conventional molecular biology tools or microarray data clustering techniques. Using support vector machines (SVMs) as a supervised learning technique, we show that a low-density fingerprint microarray contains enough information to discriminate between B.anthracis strains with 90% sensitivity using a reference library constructed from six replicate arrays and three replicates for new isolates.
   Contact: doran_michael@msn.com
C1 Depaul Univ, Intelligent Multimedia Proc Lab, Sch Comp Sci Telecommun & Informat Syst, Chicago, IL 60604 USA.
   Argonne Natl Lab, Chicago, IL USA.
RP Doran, M (reprint author), Depaul Univ, Intelligent Multimedia Proc Lab, Sch Comp Sci Telecommun & Informat Syst, Chicago, IL 60604 USA.
EM doran_michael@msn.com
NR 24
TC 11
Z9 11
U1 0
U2 0
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 1367-4803
J9 BIOINFORMATICS
JI Bioinformatics
PD FEB 15
PY 2007
VL 23
IS 4
BP 487
EP 492
DI 10.1093/bioinformatics/btl626
PG 6
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
   Computer Science, Interdisciplinary Applications; Mathematical &
   Computational Biology; Statistics & Probability
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
   Computer Science; Mathematical & Computational Biology; Mathematics
GA 136YE
UT WOS:000244259200013
PM 17204462
ER

PT J
AU Yilma, S
   Cannon-Sykora, J
   Samoylov, A
   Lo, T
   Liu, N
   Brinker, CJ
   Neely, WC
   Vodyanoy, V
AF Yilma, Solomon
   Cannon-Sykora, Jennifer
   Samoylov, Alexandre
   Lo, Ting
   Liu, Nangou
   Brinker, C. Jeffrey
   Neely, William C.
   Vodyanoy, Vitaly
TI Large-conductance cholesterol-amphotericin B channels in reconstituted
   lipid bilayers
SO BIOSENSORS & BIOELECTRONICS
LA English
DT Article
DE amphotericin B; cholesterol; bilayer; large ion channel
ID ONE-SIDED ACTION; AMPA RECEPTORS; MEMBRANES; MONOLAYERS; INTERFACE;
   LIPOSOMES; PROTEIN; STEROL; PORES; WATER
AB The antimycotic activity of amphotericin B (AmB) depends on its ability to make complexes sterols to form ion channels that cause membrane leakage. To study this phenomenon, surface pressure (pi) as a function of surface area (A) and pi-A hysteresis were measured in monolayers of AmB-cholesterol mixtures on the water-air interface. The most stable monolayers were produced from molecules of AmB and cholesterol with 2:1 stoichiometry. At this ratio, AmB and cholesterol interact to form ion channels in lipid bilayers with millisecond dwell times and conductances of 4-400 pS. The AmB-cholesterol complexes assemble in three, four, etc., subunit aggregates to form ion channels of diverse and large-conductances. Their I-V characteristics were linear over a range of +/- 200 mV. The channel currents were inhibited by the addition of tetraethylammonium (TEA), potassium channel blocker, to the cis-side of the membrane. Likewise, AmB-cholesterol complexes reconstituted in membrane-coated nanoporous silicon dioxide surfaces showed single channel behavior with large amplitudes at various voltages. Large-conductance ion channels show great promise for use in biosensors on solid supports. (c) 2006 Elsevier B.V. All rights reserved.
C1 Auburn Univ, Dept Anat Physiol & Pharmacol, Auburn, AL 36849 USA.
   Auburn Univ, Dept Chem, Auburn, AL 36849 USA.
   Auburn Univ, Dept Elect Engn, Auburn, AL 36849 USA.
   Univ New Mexico, Ctr Microengineered Mat, Albuquerque, NM 87131 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
RP Vodyanoy, V (reprint author), Auburn Univ, Dept Anat Physiol & Pharmacol, 109 Greene Hall, Auburn, AL 36849 USA.
EM vodyavi@vetmed.auburn.edu
NR 31
TC 6
Z9 8
U1 1
U2 4
PU ELSEVIER ADVANCED TECHNOLOGY
PI OXFORD
PA OXFORD FULFILLMENT CENTRE THE BOULEVARD, LANGFORD LANE, KIDLINGTON,
   OXFORD OX5 1GB, OXON, ENGLAND
SN 0956-5663
J9 BIOSENS BIOELECTRON
JI Biosens. Bioelectron.
PD FEB 15
PY 2007
VL 22
IS 7
BP 1359
EP 1367
DI 10.1016/j.bios.2006.06.004
PG 9
WC Biophysics; Biotechnology & Applied Microbiology; Chemistry, Analytical;
   Electrochemistry; Nanoscience & Nanotechnology
SC Biophysics; Biotechnology & Applied Microbiology; Chemistry;
   Electrochemistry; Science & Technology - Other Topics
GA 138TM
UT WOS:000244385400024
PM 16842986
ER

PT J
AU Chen, D
   Cui, QC
   Yang, HJ
   Barrea, RA
   Sarkar, FH
   Sheng, SJ
   Yan, B
   Reddy, GPV
   Dou, QP
AF Chen, Di
   Cui, Qiuzhi Cindy
   Yang, Huanjie
   Barrea, Raul A.
   Sarkar, Fazlul H.
   Sheng, Shijie
   Yan, Bing
   Reddy, G. Prem Veer
   Dou, Q. Ping
TI Clioquinol, a therapeutic agent for Alzheimer's disease, has
   proteasome-inhibitory, androgen receptor-suppressing,
   apoptosis-inducing, and antitumor activities in human prostate cancer
   cells and xenografts
SO CANCER RESEARCH
LA English
DT Article
ID RAY-ABSORPTION SPECTROSCOPY; COPPER DEFICIENCY; TRACE-ELEMENTS;
   BREAST-CANCER; TETRATHIOMOLYBDATE; METASTASIS; ANGIOGENESIS;
   PROGRESSION; EXPRESSION; COMPLEXES
AB Tumor growth and metastasis depend on angiogenesis that requires the cofactor copper. Consistently, high levels of copper have been found in many types of human cancers, including prostate, breast, colon, and lung. Recent studies suggest that copper could be used as a novel selective target for cancer therapies. Clioquinol is capable of forming stable complexes with copper and currently used in clinics for treatment of Alzheimer's disease. Most recently, it has been reported that clioquinol possesses antitumor effects. However, the underlying molecular mechanism is unclear. We report here that after binding to copper, clioquinol can inhibit the proteasomal chymotrypsin-like activity, repress androgen receptor (AR) protein expression, and induce apoptotic cell death in human prostate cancer LNCaP and C4-2B cells. In addition, clioquinol alone exhibits similar effects in prostate cancer cell lines with elevated copper at concentrations similar to those found in patients. Addition of dihydrotestosterone did not affect clioquinol-mediated proteasome inhibition in both prostate cancer cell lines. However, dihydrotestosterone partially inhibited clioquinol-induced AR suppression and apoptosis only in androgen-dependent LNCaP cells. Animal studies show that clioquinol treatment significantly inhibits the growth of human prostate tumor C4-2B xenografts (by 66%), associated with in vivo proteasome inhibition, AR protein repression, angiogenesis suppression, and apoptosis induction. Our study provides strong evidence that clioquinol is able to target tumor proteasome in vivo in a copper-dependent manner, resulting in formation of an active AR inhibitor and apoptosis inducer that is responsible for its observed antiprostate tumor effect.
C1 Wayne State Univ, Sch Med, Prevent Program, Barbara Ann Karmanos Canc Inst, Detroit, MI 48201 USA.
   Wayne State Univ, Sch Med, Dept Pathol, Detroit, MI 48201 USA.
   Henry Ford Hosp, Vattikuti Urol Inst, Detroit, MI 48202 USA.
   IIT, Dept Biol Chem & Phys Sci, Biophys Collaborat Access Team, Chicago, IL 60616 USA.
   Shandong Univ, Sch Pharmaceut Sci, Shandong, Peoples R China.
   Shandong Univ, Inst Environm Sci, Shandong, Peoples R China.
RP Dou, QP (reprint author), Wayne State Univ, Sch Med, Prevent Program, Barbara Ann Karmanos Canc Inst, 640 1 HWCRC,4100 John R Rd, Detroit, MI 48201 USA.
EM doup@karmanos.org
RI Yan, Bing/B-7903-2009; ID, BioCAT/D-2459-2012
OI Yan, Bing/0000-0002-7970-6764; 
NR 45
TC 110
Z9 112
U1 4
U2 13
PU AMER ASSOC CANCER RESEARCH
PI PHILADELPHIA
PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA
SN 0008-5472
J9 CANCER RES
JI Cancer Res.
PD FEB 15
PY 2007
VL 67
IS 4
BP 1636
EP 1644
DI 10.1158/0008-5472.CAN-06-3546
PG 9
WC Oncology
SC Oncology
GA 137JP
UT WOS:000244289200030
PM 17308104
ER

PT J
AU Senanayake, SD
   Waterhouse, GIN
   Chan, ASY
   Madey, TE
   Mullins, DR
   Idriss, H
AF Senanayake, S. D.
   Waterhouse, G. I. N.
   Chan, A. S. Y.
   Madey, T. E.
   Mullins, D. R.
   Idriss, H.
TI The reactions of water vapour on the surfaces of stoichiometric and
   reduced uranium dioxide: A high resolution XPS study
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT Symposium on Preparation of New Functional Catalysts and Photocatalysts
CY DEC 15-20, 2005
CL Honolulu, HI
DE uranium oxides; synchrotron radiation; XPS; TPXPS; UO2-x; UO2; U4f; O1s;
   argon-ions sputtering; D2O; surface hydroxyls
ID UO2(111) SINGLE-CRYSTAL; POLYCRYSTALLINE UO2; MONOXIDE; ADSORPTION;
   OXIDATION
AB The reaction of water with stoichiometric and O-defective UO2 thin film surfaces is studied by high-resolution photoelectron spectroscopy using synchrotron X-rays radiation. The decomposition of D2O molecules and the oxidative healing of defects on the reduced surfaces was observed and quantified. D2O adsorption on the stoichiometric UO2 surface at 300 K showed small amounts of OD species (ca. 532 eV) probably formed on trace amounts of surface defects, while at 95 K D2O ice (533.5 eV) was the main surface species. On the contrary, a large signal of OD species was seen on the 300 K-Ar+-sputtered (reduced) surface, UO2-x. This was concomitant with a rapid healing of surface defects as monitored by their U4f signal. Quantitative analysis of the OD signal with increasing temperature showed their disappearance by 550 K. The disappearance of these species while hydrogen molecules are still desorbing from the surface as monitored by TPD [S.D. Senanayake, H. Idriss, Surf. Sci. 563 (1-3) (2004) 135; S.D. Senanayake, R. Rousseau, D. Colegrave, H. Idriss, J. Nucl. Mater. 342 (2005) 179] is shedding light on the re-combinative desorption mechanism from dissociatively adsorbed water molecules on the surfaces of this defective metal oxide. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Auckland, Dept Chem, Auckland 1, New Zealand.
   Rutgers State Univ, Dept Phys & Astron, Surface Modificat Lab, Piscataway, NJ 08854 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA.
RP Idriss, H (reprint author), Univ Auckland, Dept Chem, Private Bag 92019, Auckland 1, New Zealand.
EM h.idriss@auckland.ac.nz
RI Waterhouse, Geoffrey/G-1688-2011; Senanayake, Sanjaya/D-4769-2009; 
OI Senanayake, Sanjaya/0000-0003-3991-4232; Waterhouse,
   Geoffrey/0000-0002-3296-3093
NR 26
TC 22
Z9 23
U1 5
U2 42
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD FEB 15
PY 2007
VL 120
IS 2
BP 151
EP 157
DI 10.1016/j.cattod.2006.07.040
PG 7
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 127LT
UT WOS:000243588300006
ER

PT J
AU Kim, J
   Bondarchuk, O
   Kay, BD
   White, JM
   Dohnalek, Z
AF Kim, Jooho
   Bondarchuk, Oleksandr
   Kay, Bruce D.
   White, J. M.
   Dohnalek, Z.
TI Preparation and characterization of monodispersed WO3 nanoclusters on
   TiO2(110)
SO CATALYSIS TODAY
LA English
DT Article; Proceedings Paper
CT Symposium on Preparation of New Functional Catalysts and Photocatalysts
CY DEC 15-20, 2005
CL Honolulu, HI
DE nanoclusters; TiO2(110); cyclic trimers
ID SKELETAL ISOMERIZATION; MODEL CATALYST; SELECTIVE ISOMERIZATION; TIO2
   NANOPARTICLES; ACTIVATED CARBON; CLUSTERS; DEPOSITION; VANADIA; ALUMINA;
   SURFACE
AB A procedure is described for preparing a novel model early transition metal oxide system for catalysis studies-direct sublimation of tungsten trioxide on TiO2(110). Isolated monodispersed cyclic trimers, i.e., (WO3)(3), can be formed on TiO2(110) that are thermally stable up to at least 750 K. Although not readily generalizable to monodispersed (WO3)(x) clusters other than cyclic trimers, this protocol provides an ideal nanocluster platform for carrying out model system catalysis studies over a wide temperature range. (c) 2006 Elsevier B.V. All rights reserved.
C1 Inst Interfacial Catalysis & Fundamental Sci Dire, Pacific NW Natl Lab, Richland, WA 99352 USA.
   Univ Texas, Texas Mat Inst, Ctr Mat Chem, Austin, TX 78712 USA.
RP White, JM (reprint author), Inst Interfacial Catalysis & Fundamental Sci Dire, Pacific NW Natl Lab, Richland, WA 99352 USA.
EM jmwhite@cm.utexas.edu; Zdenck.Dohnalek@pnl.gov
OI Dohnalek, Zdenek/0000-0002-5999-7867; Bondarchuk,
   Oleksandr/0000-0001-7380-8930
NR 33
TC 32
Z9 32
U1 2
U2 16
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0920-5861
J9 CATAL TODAY
JI Catal. Today
PD FEB 15
PY 2007
VL 120
IS 2
BP 186
EP 195
DI 10.1016/j.cattod.2006.07.050
PG 10
WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA 127LT
UT WOS:000243588300012
ER

PT J
AU Shang, YZ
   Liu, HL
   Hu, Y
   Prausnitz, JM
AF Shang, Yazhuo
   Liu, Honglai
   Hu, Ying
   Prausnitz, John M.
TI Phase behavior and microstructures of the Gemini
   (12-3-12,2Br(-))-SDS-H2O ternary
SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
LA English
DT Article
DE phase behavior; microstructure; cationic Gemini surfactant; anionic
   surfactant
ID CATIONIC/ANIONIC SURFACTANT SYSTEMS; SODIUM DODECYL-SULFATE; AQUEOUS
   MIXTURES; ANIONIC SURFACTANTS; DODECYLTRIMETHYLAMMONIUM BROMIDE;
   CETYLTRIMETHYLAMMONIUM BROMIDE; PHYSICOCHEMICAL PROPERTIES;
   CHAIN-LENGTH; SDS; SIMULATION
AB Phase behavior and microstructures have been investigated for aqueous mixtures of cationic Gemini surfactant (12-3-12,2Br(-)) and anionic surfactant sodium dodecyl sulfate (SDS) using freeze-etching and negative-staining and with transmission electron microscopy (TEM). The phase diagram shows different regions characterized by different microstructures. Most of the regions are occupied by multi-lamellar phases in which vesicles coexist with micelles when the solutions are dilute. The multi-lamellar vesicles have higher stability because of their special structures. The ratio of vesicles to micelles varies with concentration and composition of the mixed-surfactant solutions. At higher surfactant concentrations, we observe other phases: the lamellar phase, anisotropic phase, aqueous two-phase system (ATPS), rod-like micelle phase, as well as other unique microstructures such as cylindrical micelles formed by short rod-like micelles, and porous morphology. Observations are reported for the transformation among different phases, especially from rod-like to spherical micelles. (c) 2006 Elsevier B.V. All rights reserved.
C1 E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China.
   E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China.
   Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA.
   Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
RP Liu, HL (reprint author), E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China.
EM hlliu@ecust.edu.cn
NR 31
TC 25
Z9 30
U1 2
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-7757
J9 COLLOID SURFACE A
JI Colloid Surf. A-Physicochem. Eng. Asp.
PD FEB 15
PY 2007
VL 294
IS 1-3
BP 203
EP 211
DI 10.1016/j.colsurfa.2006.08.012
PG 9
WC Chemistry, Physical
SC Chemistry
GA 141ZJ
UT WOS:000244617500026
ER

PT J
AU Weronski, P
AF Weronski, Pawel
TI Effect of electrostatic interaction on deposition of colloid on
   partially covered surfaces - Part I. Model formulation
SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
LA English
DT Article
DE adsorption of colloid particles; particle electrostatic interaction;
   colloid deposition; Monte Carlo simulation; random sequential
   adsorption; RSA model
ID RANDOM-SEQUENTIAL ADSORPTION; SITE HETEROGENEOUS SURFACES; IRREVERSIBLE
   ADSORPTION; SPHEROIDAL PARTICLES; ASYMPTOTIC-BEHAVIOR; JAMMING LIMIT;
   ANISOTROPIC PARTICLES; STATISTICAL MECHANICS; SPHERICAL-PARTICLES; BULK
   DIFFUSION
AB We discuss the existing 2D and 3D random sequential adsorption (RSA) models and demonstrate that some of the assumptions used in these models can lead to incorrect results. Specifically, neglecting the particle-surface interaction at a distance from the adsorption surface in the 2D model can result in overestimating the surface blocking effect, while the assumption of the rectilinear particle trajectory in the model 3D can lead to inaccurate pair correlation functions. Next, we propose a new RSA approach that overcomes these shortcomings of the 2D and 3D models and allows modeling soft colloidal particle deposition (irreversible adsorption) on surfaces precovered with smaller particles. This approximate model allowing electrostatic interaction of colloid particles at a charged interface employs a many-body superposition approximation and considers adsorbing particle curvilinear trajectory in the thin electrolyte layer adjacent to the interface. Finally, we derive approximate analytical expressions for the available surface function of the adsorbing particle in the limit of low surface coverage, applying the 2D scaled-particle theory with a modification for the sphere geometry and electrostatic interaction. (c) 2006 Elsevier B.V. All rights reserved.
C1 Polish Acad Sci, Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Weronski, P (reprint author), Polish Acad Sci, Inst Catalysis & Surface Chem, Ul Niezapominajek 8, PL-30239 Krakow, Poland.
EM pawel@lanl.gov
NR 48
TC 12
Z9 12
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-7757
J9 COLLOID SURFACE A
JI Colloid Surf. A-Physicochem. Eng. Asp.
PD FEB 15
PY 2007
VL 294
IS 1-3
BP 254
EP 266
DI 10.1016/j.colsurfa.2006.08.018
PG 13
WC Chemistry, Physical
SC Chemistry
GA 141ZJ
UT WOS:000244617500032
ER

PT J
AU Weronski, P
AF Weronski, Pawel
TI Effect of electrostatic interaction on deposition of colloid on
   partially covered surfaces - Part II. Results of computer simulations
SO COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
LA English
DT Article
DE adsorption of colloid particles; particle electrostatic interaction;
   colloid deposition; Monte Carlo simulation; random sequential
   adsorption; RSA model
ID RANDOM SEQUENTIAL ADSORPTION; PARTICLES
AB We study random sequential adsorption (RSA) of electrostatically interacting colloid particles using the new simulation approach described in Paper I [P. Weronski, Effect of electrostatic interaction on deposition of colloid on partially covered surfaces. Part I. Model formulation, Coll. Surf. A 294 (2007) 254]. Numerical simulations are performed according to this curvilinear trajectory RSA model to determine the available surface function, jamming coverage, and pair-correlation function of the larger particles. The effect of the particle size ratio, electrolyte ionic strength, and the small-particle surface coverage on the large-particle deposition is demonstrated. The numerical results are tested using the two-dimensional (2D) scaled-particle theory, with a modification for the sphere geometry and electrostatic interaction, exploiting the extension of the effective hard-particle approximation to bimodal systems. The effect of electrolyte concentration on the effective minimum particle surface-to-surface distance is presented, too. The numerical results are compared with the results obtained using two older approaches, the 2D and three-dimensional (3D) RSA models. The study suggests that the formula stemming from the scaled-particle theory provides a good approximation in the low surface coverage limit. The results obtained with the 3D and curvilinear trajectory models indicate that large-particle/substrate attractive interaction significantly reduces the kinetic barrier to large, charged-particle adsorption at a surface precovered with small, like-charged particles. The available surface function and jamming-coverage values predicted using the simplified 3D and the more sophisticated curvilinear trajectory models are similar, while the results obtained with the 2D model differ significantly. The pair-correlation function suggests different structures of monolayers obtained with the three models. Results of this research clearly suggest that the extended curvilinear trajectory RSA approach can fruitfully be exploited for numerical simulations of colloid-particle adsorption at precovered surfaces, allowing the investigation of soft-particle systems. (c) 2006 Elsevier B.V. All rights reserved.
C1 Polish Acad Sci, Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland.
   Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
RP Weronski, P (reprint author), Polish Acad Sci, Inst Catalysis & Surface Chem, Ul Niezapominajek 8, PL-30239 Krakow, Poland.
EM pawel@lanl.gov
NR 15
TC 6
Z9 6
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-7757
J9 COLLOID SURFACE A
JI Colloid Surf. A-Physicochem. Eng. Asp.
PD FEB 15
PY 2007
VL 294
IS 1-3
BP 267
EP 279
DI 10.1016/j.colsurfa.2006.08.020
PG 13
WC Chemistry, Physical
SC Chemistry
GA 141ZJ
UT WOS:000244617500033
ER

PT J
AU Alwall, J
   Ballestrero, A
   Bartalini, P
   Belov, S
   Boos, E
   Buckley, A
   Butterworth, JM
   Dudko, L
   Frixione, S
   Garren, L
   Gieseke, S
   Gusev, A
   Hinchliffe, I
   Huston, J
   Kersevan, B
   Krauss, F
   Lavesson, N
   Lonnblad, L
   Maina, E
   Maltoni, F
   Mangano, ML
   Moortgat, F
   Mrenna, S
   Papadopoulos, CG
   Pittau, R
   Richardson, P
   Seymour, MH
   Sherstnev, A
   Sjostrand, T
   Skands, P
   Slabospitsky, SR
   Was, Z
   Webber, BR
   Worek, M
   Zeppenfeld, D
AF Alwall, J.
   Ballestrero, A.
   Bartalini, P.
   Belov, S.
   Boos, E.
   Buckley, A.
   Butterworth, J. M.
   Dudko, L.
   Frixione, S.
   Garren, L.
   Gieseke, S.
   Gusev, A.
   Hinchliffe, I.
   Huston, J.
   Kersevan, B.
   Krauss, F.
   Lavesson, N.
   Lonnblad, L.
   Maina, E.
   Maltoni, F.
   Mangano, M. L.
   Moortgat, F.
   Mrenna, S.
   Papadopoulos, C. G.
   Pittau, R.
   Richardson, P.
   Seymour, M. H.
   Sherstnev, A.
   Sjostrand, T.
   Skands, P.
   Slabospitsky, S. R.
   Was, Z.
   Webber, B. R.
   Worek, M.
   Zeppenfeld, D.
TI A standard format for Les Houches Event Files
SO COMPUTER PHYSICS COMMUNICATIONS
LA English
DT Article
DE event generators; Les Houches Accord; file format
AB A standard file format is proposed to store process and event information, primarily output from partoti-level event generators for further use by general-purpose ones. The information content is identical with what was already defined by the Les Houches Accord five years ago, but then in terms of Fortran commonblocks. This information is embedded in a minimal XML-style structure, for clarity and to simplify parsing. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Catholique Louvain, Ctr Particle Phys & Phenomenol CP3, B-1348 Louvain, Belgium.
   Univ Karlsruhe, Inst Theoret Phys, D-76128 Karlsruhe, Germany.
   NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece.
   Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy.
   Univ Turin, Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
   Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy.
   PAN, Inst Nucl Phys, PL-313420 Krakow, Poland.
   Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia.
   MSU, Skobeltsyn Inst Nucl Phys, Moscow 119992, Russia.
   Inst High Energy Phys, Protvino, Moscow Region, Russia.
   Univ Ljubljana, Fac Math & Phys, SI-1000 Ljubljana, Slovenia.
   Lund Univ, Dept Theoret Phys, SE-22362 Lund, Sweden.
   CERN, PH, CH-1211 Geneva 23, Switzerland.
   ETH, Inst Particle Phys, CH-8093 Zurich, Switzerland.
   Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
   Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE, England.
   UCL, Dept Phys & Astron, London WC1E 6BT, England.
   Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England.
   Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA.
   Lawrence Berkeley Lab, Berkeley, CA 94720 USA.
   Michigan State Univ, E Lansing, MI 48840 USA.
   Univ Florida, Dept Phys, Gainesville, FL 32611 USA.
RP Sjostrand, T (reprint author), Univ Catholique Louvain, Ctr Particle Phys & Phenomenol CP3, Chemin Cyclotron 2, B-1348 Louvain, Belgium.
EM torbjorn@thep.lu.se
RI Dudko, Lev/D-7127-2012; Boos, Eduard/D-9748-2012; Worek, Malgorzata
   /M-4575-2013; Belov, Sergey/G-7753-2014; Pittau, Roberto/E-7953-2016; 
OI Webber, Bryan/0000-0001-7474-0990; Krauss, Frank/0000-0001-5043-3099;
   Skands, Peter/0000-0003-0024-3822; Dudko, Lev/0000-0002-4462-3192;
   Pittau, Roberto/0000-0003-1365-2959; Lonnblad, Leif/0000-0003-1269-1649;
   Mrenna, Stephen/0000-0001-8731-160X; Maina, Ezio/0000-0002-4989-1575;
   Sjostrand, Torbjorn/0000-0002-7630-8605
NR 6
TC 152
Z9 152
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0010-4655
J9 COMPUT PHYS COMMUN
JI Comput. Phys. Commun.
PD FEB 15
PY 2007
VL 176
IS 4
BP 300
EP 304
DI 10.1016/j.cpc.2006.11.010
PG 5
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA 139DD
UT WOS:000244411600006
ER

PT J
AU Badro, J
   Fiquet, G
   Guyot, F
   Gregoryanz, E
   Occelli, F
   Antonangeli, D
   d'Astuto, M
AF Badro, James
   Fiquet, Guillaume
   Guyot, Francois
   Gregoryanz, Eugene
   Occelli, Florent
   Antonangeli, Daniele
   d'Astuto, Matteo
TI Effect of light elements on the sound velocities in solid iron:
   Implications for the composition of Earth's core
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE Earth's core; light elements; high-pressure; seismic wave velocities;
   solubility; experimental putrology
ID AB-INITIO CALCULATIONS; HIGH-PRESSURE; INNER-CORE; OUTER CORE;
   TEMPERATURE; CONSTRAINTS; SULFUR; DENSITY; STATE; MARS
AB We measured compressional sound velocities in light element alloys of iron (FeO, FeSi, FeS, and FeS2) at high-pressure by inelastic X-ray scattering. This dataset provides new mineralogical constraints on the composition of Earth's core, and completes the previous sets formed by the pressure-density systematics for these compounds. Based on the combination of these datasets and their comparison with radial seismic models, we propose an average composition model of the Earth's core. We show that the incorporation of small amounts of silicon or oxygen is compatible with geophysical observations and geochemical abundances. The effect of nickel on the calculated light element contents is shown to be negligible. The preferred core model derived from our measurements is an inner core which contains 2.3 wt.% silicon and traces of oxygen, and an outer core containing 2.8 wt.% silicon and around 5.3 wt.% oxygen. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Paris 06, Inst Mineral & Phys Milieux Condenses, CNRS, Paris, France.
   Univ Paris 07, Inst Mineral & Phys Milieux Condenses, CNRS, Paris, France.
   Inst Phys Globe, Equipe Mineral, Paris, France.
   Lawrence Livermore Natl Lab, Div Earth Sci, Livermore, CA USA.
RP Badro, J (reprint author), Univ Paris 06, Inst Mineral & Phys Milieux Condenses, CNRS, Paris, France.
EM badro@ipgp.jussieu.fr
RI Fiquet, Guillaume/H-1219-2011; d'Astuto, Matteo/F-8235-2013; Fiquet,
   Guillaume/M-6934-2014; GUYOT, Francois/C-3824-2016; IMPMC,
   Geobio/F-8819-2016; Badro, James/A-6003-2011
OI d'Astuto, Matteo/0000-0002-7583-4427; GUYOT,
   Francois/0000-0003-4622-2218; 
NR 39
TC 124
Z9 126
U1 1
U2 44
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD FEB 15
PY 2007
VL 254
IS 1-2
BP 233
EP 238
DI 10.1016/j.epsl.2006.11.025
PG 6
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 141QY
UT WOS:000244595000020
ER

PT J
AU Jones, AP
   Hoffmann, JW
   Smith, DN
   Feeley, TJ
   Murphy, JT
AF Jones, Andrew P.
   Hoffmann, Jeffrey W.
   Smith, Dennis N.
   Feeley, Thomas J., III
   Murphy, James T.
TI DOE/NETL's phase II mercury control technology field testing program:
   Preliminary economic analysis of activated carbon injection
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
AB Based on results of field testing conducted by the U.S. Department of Energy's National Energy Technology Laboratory (DOE/NETL), this article provides preliminary costs for mercury control via conventional activated carbon injection (ACI), brominated ACI, and conventional ACI coupled with the application of a sorbent enhancement additive (SEA) to coal prior to combustion. The economic analyses are reported on a plant-specific basis in terms of the cost required to achieve low (50%), mid (70%), and high (90%) levels of mercury removal "above and beyond" the baseline mercury removal achieved by existing emission control equipment. In other words, the levels of mercury control are directly attributable to ACI. Mercury control costs via ACI have been amortized on a current dollar basis. Using a 20-year book life, levelized costs for the incremental increase in cost of electricity (COE), expressed in mills per kilowatt-hour (mills/kWh), and the incremental cost of mercury control, expressed in dollars per pound of mercury removed ($/lb Hg removed), have been calculated for each level of ACI mercury control. For this analysis, the increase in COE varied from 0.14 mills/kWh to 3.92 mills/kWh. Meanwhile, the incremental cost of mercury control ranged from $3810/lb Hg removed to $166 000/lb Hg removed.
C1 Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Jones, AP (reprint author), Natl Energy Technol Lab, 626 Cochrans Mill Rd,POB 10940, Pittsburgh, PA 15236 USA.
EM Andrew.Jones@netl.doe.gov
NR 12
TC 89
Z9 98
U1 2
U2 25
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD FEB 15
PY 2007
VL 41
IS 4
BP 1365
EP 1371
DI 10.1021/es0617340
PG 7
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 135NZ
UT WOS:000244161600049
PM 17593743
ER

PT J
AU Liu, SH
   Yan, NQ
   Liu, ZR
   Qu, Z
   Wang, P
   Chang, SG
   Miller, C
AF Liu, Shou-Heng
   Yan, Nai-Qiang
   Liu, Zhao-Rong
   Qu, Zan
   Wang, Paul
   Chang, Shih-Ger
   Miller, Charles
TI Using bromine gas to enhance mercury removal from flue gas of coal-fired
   power plants
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID SORBENTS
AB Bromine gas was evaluated for converting elemental mercury (Hg-0) to oxidized mercury, a form that can readily be captured by the existing air pollution control device. The gas-phase oxidation rates of Hg-0 by Br-2 decreased with increasing temperatures. SO2, CO, HCl, and H2O had insignificant effect, while NO exhibited a reverse course of effect on the Hg-0 oxidation: promotion at low NO concentrations and inhibition at high NO concentrations. A reaction mechanism involving the formation of van der Waals clusters is proposed to account for NO's reverse effect. The apparent gas-phase oxidation rate constant, obtained under conditions simulating a flue gas without flyash, was 3.61 x 10(-17) cm(3)center dot molecule(-1)center dot s(-1) at 410 K corresponding to a 50% Hg-0 oxidation using 52 ppm Br-2 in a reaction time of 15 s. Flyash in flue gas significantly promoted the oxidation of Hg-0 by Br-2, and the unburned carbon component played a major role in the promotion primarily through the rapid adsorption of Br-2 which effectively removed Hg-0 from the gas phase. At a typical flue gas temperature, SO2 slightly inhibited the flyash-induced Hg-0 removal. Conversely, NO slightly promoted the flyash induced Hg-0 removal by Br-2. Norit Darco-Hg-LH and Darco-Hg powder activated carbons, which have been demonstrated in field tests, were inferred for estimating the flyash induced Hg-0 oxidation by Br-2. Approximately 60% of Hg-0 is estimated to be oxidized with the addition of 0.4 ppm of gaseous Br-2 into full scale power plant flue gas.
C1 Univ Calif Berkeley, Environm Energy Technol Div, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
RP Chang, SG (reprint author), Univ Calif Berkeley, Environm Energy Technol Div, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
EM sgchang@lbl.gov
RI Liu, Shou-Heng/B-3391-2008
OI Liu, Shou-Heng/0000-0002-4852-874X
NR 21
TC 62
Z9 70
U1 2
U2 66
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0013-936X
J9 ENVIRON SCI TECHNOL
JI Environ. Sci. Technol.
PD FEB 15
PY 2007
VL 41
IS 4
BP 1405
EP 1412
DI 10.1021/es061705p
PG 8
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA 135NZ
UT WOS:000244161600055
PM 17593749
ER

PT J
AU Kelly, SD
   Kemner, KM
   Brooks, SC
AF Kelly, Shelly D.
   Kemner, Kenneth M.
   Brooks, Scott C.
TI X-ray absorption spectroscopy identifies calcium-uranyl-carbonate
   complexes at environmental concentrations
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID URANIUM(VI) ADSORPTION; STRUCTURAL-CHARACTERIZATION; CONTAMINATED
   AQUIFER; MULTIPLE-SCATTERING; TERNARY COMPLEXES; U(VI) SORPTION;
   FINE-STRUCTURE; REDUCTION; EXAFS; XAFS
AB Current research on bioremediation of uranium-contaminated groundwater focuses on supplying indigenous metal-reducing bacteria with the appropriate metabolic requirements to induce microbiological reduction of soluble uranium(VI) to poorly soluble uranium(IV). Recent studies of uranium(VI) bioreduction in the presence of environmentally relevant levels of calcium revealed limited and slowed uranium(VI) reduction and the formation of a Ca-UO2-CO3 complex. However, the stoichiometry of the complex is poorly defined and may be complicated by the presence of a Na-UO2-CO3 complex. Such a complex might exist even at high calcium concentrations, as some UO2CO3 complexes will still be present. The number of calcium and/or sodium atoms coordinated to a uranyl carbonate complex will determine the net charge of the complex. Such a change in aqueous speciation of uranium(VI) in calcareous groundwater may affect the fate and transport properties of uranium. In this paper, we present the results from X-ray absorption fine structure (XAFS) measurements of a series of solutions containing 50 mu M uranium(VI) and 30 mM sodium bicarbonate, with various calcium concentrations of 0-5 mM. Use of the data series reduces the uncertainty in the number of calcium atoms bound to the UO2-CO3 Complex to approximately 0.6 and enables spectroscopic identification of the Na-UO2-CO3 complex. At nearly neutral pH values, the numbers of sodium and calcium atoms bound to the uranyl triscarbonate species are found to depend on the calcium concentration, as predicted by speciation calculations. (c) 2006 Elsevier Inc. All rights reserved.
C1 Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA.
   Oak Ridge Natl Lab, Oak Ridge, TN USA.
RP Kelly, SD (reprint author), Argonne Natl Lab, Div Environm Res, 9700 S Cass Ave, Argonne, IL 60439 USA.
EM skelly@anl.gov
RI Brooks, Scott/B-9439-2012; ID, MRCAT/G-7586-2011
OI Brooks, Scott/0000-0002-8437-9788; 
NR 55
TC 42
Z9 43
U1 3
U2 33
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD FEB 15
PY 2007
VL 71
IS 4
BP 821
EP 834
DI 10.1016/j.gca.2006.10.013
PG 14
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 136YH
UT WOS:000244259500002
ER

PT J
AU Slowey, AJ
   Brown, GE
AF Slowey, Aaron J.
   Brown, Gordon E., Jr.
TI Transformations of mercury, iron, and sulfur during the reductive
   dissolution of iron oxyhydroxide by sulfide
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Review
ID DESULFOBULBUS-PROPIONICUS 1PR3; SULFATE-REDUCING BACTERIA; FRESH-WATER
   SEDIMENTS; MARINE-SEDIMENTS; ORGANIC-MATTER; HYDROGEN-SULFIDE; MINE
   TAILINGS; METHYLMERCURY CONCENTRATIONS; FLORIDA EVERGLADES; METHYLATION
   RATES
AB Methylmercury can accumulate in fish to concentrations unhealthy for humans and other predatory mammals. Most sources of mercury (Hg) emit inorganic species to the environment. Therefore, ecological harm occurs when inorganic Hg is converted to methylmercury. Sulfate- and iron-reducing bacteria (SRB and FeRB) methylate Hg, but the effects of processes involving oxidized and reduced forms of sulfur and iron on the reactivity of Hg, including the propensity of inorganic Hg to be methylated, are poorly understood. Under abiotic conditions, using a laboratory flow reactor, bisulfide (HS-) was added at 40 to 250 mu M h(-1) to 5 g L-1 goethite (alpha-FeOOH) suspensions to which Hg(II) was adsorbed (30-100 nmol m(-2)) at pH 7.5. Dissolved Hg initially decreased from 10(3) or 10(4) nM (depending on initial conditions) to 10(-1) nM, during which the concentration of Hg(II) adsorbed to goethite decreased by 80% and metacinnabar (beta-HgS(s)) formed. based on identification using Hg L-III-edge extended X-ray absorption fine structure (EXAFS) spectroscopic analysis. The apparent coordination of oxygens surrounding Hg(II), measured with EXAFS spectroscopy, increased during one flow experiment, suggesting desorption of monodentate-bound Hg(II) while bidentate-bound Hg(II) persisted on the goethite surface. Further sulfidation increased dissolved Hg concentrations by one to two orders of magnitude (0.5 to 10 nM or 30 nM), suggesting that byproducts of bisulfide oxidation and Fe(III) reduction, primarily polysulfide and potentially Fe(II), enhanced the dissolution of beta-HgS(s) and/or desorption of Hg(II). Rapid accumulation of Fe(II) in the solid phase (up to 40 mu mol g(-1)) coincided with faster elevation of dissolved Hg concentrations. Fe(II) served as a proxy for elemental sulfur [S(0)], as S(0) was the dominant bisulfide oxidation product coupled to Fe(III) reduction. based on sulfur K-edge X-ray absorption near edge structure (XANES) spectroscopy. In one experiment, dissolved Hg concentrations tracked those of all sulfide species [S(-II)]. These results suggest that S(-II) reacted with S(0) to form polysulfide, which then caused the dissolution of beta-HgS(s). A secondary Fe-bearing phase resembling poorly formed green rust was observed in sulfidized solids with scanning electron microscopy,. although there was no clear evidence that either surface-bound or mineralized Fe(II) strongly affected Hg speciation. Examination of interrelated processes involving S(41) and Fe(III) revealed new modes of Hg solubilization previously not considered in Hg reactivity models. (c) 2006 Elsevier Inc. All rights reserved.
C1 Stanford Univ, Dept Geog & Environm Sci, Stanford, CA 94305 USA.
   Stanford Synchrotron Radiat Lab, SLAC, Menlo Pk, CA 94025 USA.
RP Slowey, AJ (reprint author), US Geol Survey, 345 Middlefield Rd,MS 901, Menlo Pk, CA 94025 USA.
EM aaron.slowey@gmail.com
NR 104
TC 30
Z9 31
U1 6
U2 57
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
EI 1872-9533
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD FEB 15
PY 2007
VL 71
IS 4
BP 877
EP 894
DI 10.1016/j.gca.2006.11.011
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 136YH
UT WOS:000244259500006
ER

PT J
AU Takahashi, Y
   Manceau, A
   Geoffroy, N
   Marcus, MA
   Usui, A
AF Takahashi, Yoshio
   Manceau, Alain
   Geoffroy, Nicolas
   Marcus, Matthew A.
   Usui, Akira
TI Chemical and structural control of the partitioning of Co, Ce, and Pb in
   marine ferromanganese oxides
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID X-RAY-ABSORPTION; RARE-EARTH-ELEMENTS; METAL SORBED BIRNESSITE; CENTRAL
   PACIFIC-OCEAN; NEAR-EDGE STRUCTURE; BOND-VALENCE DETERMINATION; PB(II)
   SORPTION PRODUCTS; RIVER SUPERFUND COMPLEX; HYDROUS FERRIC-OXIDE;
   SURFACE COMPLEXATION
AB The oxidation state and mineral phase association of Co, Ce, and Pb in hydrogenetic, diagenetic, and hydrothermal marine ferromanganese oxides were characterized by X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectroscopy and chemical extraction. Cobalt is trivalent and associated exclusively with the Mn oxide component (vernadite). Cerium is tetravalent in all genetic-type oxides (detection limit for Ce(III) similar to 5 at. %), including Fe-rich areas (ferrihydrite) of hydrogenetic oxides, and is associated primarily with vernadite. Thus, the extent of a Cc anomaly does not result from variations in redox conditions, but appears to be kinetically controlled, decreasing when the growth rate increases from hydrogenetic to diagenetic to hydrothermal oxides. Lead is divalent and associated with Mn and Fe oxides in variable proportions. According to EXAFS data, Pb is mostly sorbed on edge sites at chain terminations in Fe oxide and at layer edges in Mn oxide (ES complex), and also on interlayer vacancy sites in Mn oxide (TCS complex). Sequential leaching experiments, spectroscopic data, and electrochemical considerations suggest that the geochemical partitioning in favor of the Mn oxide component decreases from Co to Ce to Pb, and depends on their oxidative scavenging by Mn and Fe oxides. (c) 2006 Elsevier Inc. All rights reserved.
C1 Hiroshima Univ, Dept Earth & Planetary Syst Sci, Grad Sch Sci, Hiroshima 7398526, Japan.
   Hiroshima Univ, Lab MIRAGE, Hiroshima 7398526, Japan.
   Univ Grenoble 1, LGIT, Environm Geochem Grp, F-38041 Grenoble 9, France.
   CNRS, F-38041 Grenoble 9, France.
   Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
   Kochi Univ, Fac Sci, Dept Nat Environm Sci, Kochi 7808520, Japan.
RP Takahashi, Y (reprint author), Hiroshima Univ, Dept Earth & Planetary Syst Sci, Grad Sch Sci, Hiroshima 7398526, Japan.
EM ytakaha@hiroshima-u.ac.jp
RI Takahashi, Yoshio/F-6733-2011; Beamline, FAME/G-9313-2012
NR 136
TC 103
Z9 111
U1 5
U2 51
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0016-7037
EI 1872-9533
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD FEB 15
PY 2007
VL 71
IS 4
BP 984
EP 1008
DI 10.1016/j.gca.2006.11.016
PG 25
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 136YH
UT WOS:000244259500013
ER

PT J
AU Anders, A
   Oks, E
AF Anders, Andre
   Oks, Efim
TI Charge-state-resolved ion energy distribution functions of cathodic
   vacuum arcs: A study involving the plasma potential and biased plasmas
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID HOT BORON CATHODE; VELOCITIES; REGION; FIELD; FLUX
AB Charge-state-resolved ion energy distribution functions were measured for pulsed cathodic arcs taking the sheath into account that formed between the plasma and the entrance of a combined energy and mass spectrometer. An electron emitting probe was employed to independently determine the plasma potential. All results were obtained by averaging over several individual measurements because the instantaneous energy distributions and the plasma potential show large amplitude fluctuations due to the explosive nature of the arc plasma generation. It was found that the ion energy distribution functions in the plasma were independent of the ion charge state. This is in contrast to findings with continuously operating, direct-current arcs that employ a magnetic field at the cathode to steer the cathode spot motion. The different findings indicate the important role of the magnetic steering field for the plasma properties of direct-current arcs. The results are further supported by experiments with "biased plasmas" obtained by shifting the potential of the anode. Finally, it was shown that the ion energy distributions were broader and shifted to higher energy at the beginning of each arc pulse. The characteristic time for relaxation to steady state distributions is about 100 mu s.
C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   State Univ Control Syst& Radioelect, Tomsk 634050, Russia.
RP Anders, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA.
EM aanders@lbl.gov
RI Oks, Efim/A-9409-2014; Anders, Andre/B-8580-2009
OI Oks, Efim/0000-0002-9323-0686; Anders, Andre/0000-0002-5313-6505
NR 29
TC 7
Z9 7
U1 0
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 15
PY 2007
VL 101
IS 4
AR 043304
DI 10.1063/1.2561226
PG 6
WC Physics, Applied
SC Physics
GA 140TY
UT WOS:000244530800016
ER

PT J
AU Duncan, KL
   Wang, YL
   Bishop, SR
   Ebrahimi, F
   Wachsman, ED
AF Duncan, Keith L.
   Wang, Yanli
   Bishop, Sean R.
   Ebrahimi, Fereshteh
   Wachsman, Eric D.
TI The role of point defects in the physical properties of
   nonstoichiometric ceria
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SOLID-SOLUTIONS; ELECTROLYTES; DIOXIDE; OXIDES
AB Explicit, analytical expressions have been derived for the dependence of electrical conductivity, chemical expansion, and elastic modulus on point defect concentration and oxygen partial pressure using a consistent approach. In developing the model, expressions were first derived for the functional dependence of defect concentration on the oxygen partial pressure for fluorite oxides. Expressions for the chemical expansion, elastic modulus, and electrical conductivity as functions of defect concentration are then derived and verified with experimental data for ceria (CeO2-delta) with consistently good fits. The same values for the material constants were used in all of the fits, further validating our approach. (c) 2007 American Institute of Physics.
C1 Univ Florida, Dept Mat Sci & Engn, UF DOE High Temp Electrochem Ctr, Gainesville, FL 32611 USA.
RP Wachsman, ED (reprint author), Univ Florida, Dept Mat Sci & Engn, UF DOE High Temp Electrochem Ctr, Gainesville, FL 32611 USA.
EM ewach@mse.ufl.edu
OI Duncan, Keith/0000-0002-7190-3675
NR 14
TC 23
Z9 23
U1 4
U2 22
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 15
PY 2007
VL 101
IS 4
AR 044906
DI 10.1063/1.2559601
PG 6
WC Physics, Applied
SC Physics
GA 140TY
UT WOS:000244530800094
ER

PT J
AU Ma, ZX
   Holden, T
   Wang, ZMM
   Salamo, GJ
   Malikova, L
   Mao, SS
AF Ma, Zhixun
   Holden, Todd
   Wang, Zhiming M.
   Salamo, Gregory J.
   Malikova, Lyudmila
   Mao, Samuel S.
TI Strain-induced electronic energy changes in multilayered InGaAs/GaAs
   quantum wire structures
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID X-RAY-DIFFRACTION; WELL STRUCTURES; DOT CHAINS; RELAXATION; ANISOTROPY;
   (IN,GA)AS/GAAS(100); PHOTOREFLECTANCE; INTERFACES; GAAS(100); ISLANDS
AB Electronic states of layered InGaAs/GaAs(001) quantum wire and quantum dot chain structures have been investigated by electroreflectance and surface photovoltage spectroscopy. Band-gap shrinkage and heavy-hole/light-hole state splitting have been observed in the GaAs barrier material. This can be understood by shear strain existing in the GaAs barrier due to strain relaxation and anisotropy within the wires or dot chains. By comparing the experimental results with theoretical calculations, we found that the strain relaxation in the direction perpendicular to the wires or the dot chains has a stronger effect on the heavy-hole-light-hole splitting than on band-gap modification in the InGaAs wires and dot chains. The piezoelectric field induced by the shear strain is also discussed. (c) 2007 American Institute of Physics.
C1 CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA.
   CUNY Brooklyn Coll, New York State Ctr Adv Technol Photon Applicat, Brooklyn, NY 11210 USA.
   Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA.
   CUNY Queensborough Community Coll, Dept Phys, New York, NY 11364 USA.
   Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA.
RP Ma, ZX (reprint author), CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA.
EM zxma@lbl.gov
RI Wang, Zhiming/B-6320-2009; Wang, Zhiming/Q-1031-2015
NR 34
TC 5
Z9 5
U1 2
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 15
PY 2007
VL 101
IS 4
AR 044305
DI 10.1063/1.2437574
PG 8
WC Physics, Applied
SC Physics
GA 140TY
UT WOS:000244530800065
ER

PT J
AU Marian, J
   Zepeda-Ruiz, LA
   Couto, N
   Bringa, EM
   Gilmer, GH
   Stangeby, PC
   Rognlien, TD
AF Marian, Jaime
   Zepeda-Ruiz, Luis A.
   Couto, Nicole
   Bringa, Eduardo M.
   Gilmer, George H.
   Stangeby, Peter C.
   Rognlien, Thomas D.
TI Characterization of sputtering products during graphite exposure to
   deuterium ions by molecular dynamics
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ENERGY-DISTRIBUTIONS; CHEMICAL EROSION; HYDROCARBON FILMS; LIGHT-IONS;
   DIII-D; CARBON; IMPACT; REFLECTION; HYDROGEN; DEPENDENCE
AB We study sputtering by 100 eV deuterium irradiation on deuterated amorphous carbon layers at 300 K using molecular dynamics (MD) simulations. Two main results are reported here. First, a special mechanism for carbon release-additional to and distinct from the standard definitions for physical and chemical sputtering of carbon by hydrogen isotopes-has been identified and quantified. This process, here termed ion induced release of unsaturated hydrocarbons (IRUH's), is primarily due to a recently identified atomic collision process where momentum from an impacting particle is transferred approximately perpendicular to the C-C bond, severing it. For the prescribed conditions, the IRUH yield has been found to be comparable to that of standard physical and chemical sputtering, the former being also consistently and simultaneously calculated here. IRUH release of single C atoms does not involve any hydrogenic chemistry and is therefore properly considered to be a distinct and additive type of physical sputtering to that of standard physical sputtering. For 100 eV D+ the single C yields of the two physical sputtering mechanisms have been found to be approximately equal. IRUH release of carbon is directly from the surface region of the solid and is separate from, and additional to, standard chemical sputtering (not included in these MD calculations), which typically produces saturated hydrocarbons such as CD4, from regions extending over the stopping depth of the deuteron in the solid. IRUH is evidently included in experimental measurements of total sputtering yield, e.g., by weight loss. The average energy of IRUH carbon products is about 1 eV and the angular distribution is consistent with a cosine distribution. Second, it is found that for the standard physically sputtered single C atoms the energy distribution is roughly consistent with the widely used Thompson distribution-this despite the fact that the assumptions on which the Thompson distribution is based are not satisfied for 100 eV D on C. The angular distribution of the standard physically sputtered single C atoms is also found to be consistent with the usually assumed cosine distribution. (c) 2007 American Institute of Physics.
C1 Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94551 USA.
   Univ Toronto, Inst Aerosp Studies, Toronto, ON M3H 5T6, Canada.
   Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, Livermore, CA 94551 USA.
RP Marian, J (reprint author), Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94551 USA.
EM marian1@llnl.gov
RI Bringa, Eduardo/F-8918-2011
NR 44
TC 22
Z9 22
U1 2
U2 9
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 15
PY 2007
VL 101
IS 4
AR 044506
DI 10.1063/1.2496577
PG 15
WC Physics, Applied
SC Physics
GA 140TY
UT WOS:000244530800079
ER

PT J
AU Srinivasan, SG
   Baskes, MI
   Wagner, GJ
AF Srinivasan, S. G.
   Baskes, M. I.
   Wagner, G. J.
TI Atomistic simulations of shock induced microstructural evolution and
   spallation in single crystal nickel
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID LATTICE-DEFECTS; STRAIN RATES; FRACTURE; COPPER; RANGE; TEMPERATURES;
   TITANIUM; HYDROGEN; FAILURE; DAMAGE
AB Spallation in single crystalline nickel was studied using molecular dynamics simulations. The shock waves-incident waves, the waves reflected from sample free surfaces, and interference between reflected waves-create and destroy many microstructural features. These features, though unimportant in determining the spall strength, control the spall nucleation site. Spall occurs by cavitation at a grain boundary junction in cold, defective, tensile regions of the sample. Atomistic calculations and experiments, though separated by six orders of magnitude in strain rates, follow a universal strain rate behavior.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   Sandia Natl Labs, Livermore, CA 94551 USA.
RP Srinivasan, SG (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
EM sgsrini@lanl.gov; baskes@lanl.gov
RI Wagner, Gregory/I-4377-2015
NR 29
TC 34
Z9 35
U1 1
U2 10
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 15
PY 2007
VL 101
IS 4
AR 043504
DI 10.1063/1.2423084
PG 7
WC Physics, Applied
SC Physics
GA 140TY
UT WOS:000244530800022
ER

PT J
AU Wang, ZG
   Zu, XT
   Gao, F
   Weber, WJ
AF Wang, Zhiguo
   Zu, Xiaotao
   Gao, Fei
   Weber, William J.
TI Size dependence of melting of GaN nanowires with triangular cross
   sections
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID GALLIUM NITRIDE; MOLECULAR-DYNAMICS; PRESSURE; DEFECTS
AB Molecular dynamics simulations have been used to study the melting of GaN nanowires with triangular cross sections. The variation in potential energy as a function of the cross-sectional area of GaN nanowires, along with the atomic configuration, is used to monitor the phase transition. The thermal stability of GaN nanowires is strongly size dependent. The melting temperature of the GaN nanowires increases with increasing cross-sectional area to a saturation value. Melting of the nanowires is initiated at the surface edges formed by the triangular shape and then spreads across the nanowire surface. As temperature increases, the melting expands into the inner regions of the nanowires.
C1 Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
   Pacific NW Natl Lab, Richland, WA 99352 USA.
RP Wang, ZG (reprint author), Univ Elect Sci & Technol China, Dept Appl Phys, Chengdu 610054, Peoples R China.
EM zgwan_dr@yahoo.com; xiaotaozu@yahoo.com; fei.gao@pnl.gov
RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012; Wang,
   Zhiguo/B-7132-2009
OI Weber, William/0000-0002-9017-7365; 
NR 26
TC 10
Z9 10
U1 0
U2 8
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD FEB 15
PY 2007
VL 101
IS 4
AR 043511
DI 10.1063/1.2512140
PG 4
WC Physics, Applied
SC Physics
GA 140TY
UT WOS:000244530800029
ER

PT J
AU Rutherford, SW
   Coons, JE
AF Rutherford, S. W.
   Coons, J. E.
TI Water sorption in silicone foam containing diatomaceous earth
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
ID MULTIMOLECULAR LAYERS; ADSORPTION; GASES; VAPOR; DIFFUSION; ISOTHERMS;
   TRANSPORT; MEMBRANES; BEHAVIOR
AB Room temperature vulcanizing (RTV) silicone foams are commonly used for compression sealing, structural support, packaging, and damping applications. The presence of sorbed water infoams can affect the mechanical and chemical properties of these materials. In order to investigate water sorption behavior, a silicone foam containing diatomaceous earth filler was synthesized and studied for water uptake characteristics at 20, 50, and 80 degrees C. Type II equilibrium and bimodal kinetic behavior that was governed by a rapid initial uptake followed by a prolonged sorption over a larger time scale was observed. In order to explain this bimodal behavior, the major components of this foam-the silicone polymer and the diatomaceous earth-were independently studied for their water equilibrium behavior and uptake kinetic characteristics. Type II equilibrium was observed for both components. The kinetic behavior of the silicone polymer was governed by a. very rapid uptake of water. The kinetic behavior of the diatomaceous earth was governed by a rapid initial uptake followed by a prolonged sorption over a larger time. scale. A physically based and thermodynamically consistent mathematical model describing the water equilibrium and kinetics in diatomaceous earth and silicone polymer Components, was employed to characterize the data. This model formed the basis of a predictive model for estimation of water sorption in filled silicone foam. The predictive model was tested against sorption and desorption data yielding favorable results for a range of temperatures. (c) 2006 Elsevier Inc. All rights reserved.
C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
RP Rutherford, SW (reprint author), Los Alamos Natl Lab, WT-6, Los Alamos, NM 87545 USA.
EM stevenr@lanl.gov
RI Coons, Jim/G-5159-2011; 
OI Coons, Jim/0000-0003-1392-298X
NR 38
TC 10
Z9 10
U1 3
U2 17
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9797
J9 J COLLOID INTERF SCI
JI J. Colloid Interface Sci.
PD FEB 15
PY 2007
VL 306
IS 2
BP 228
EP 240
DI 10.1016/j.jcis.2006.10.068
PG 13
WC Chemistry, Physical
SC Chemistry
GA 123PL
UT WOS:000243307700005
PM 17140596
ER

PT J
AU Rondinone, AJ
   Pawel, M
   Travaglini, D
   Mahurin, S
   Dai, S
AF Rondinone, Adam J.
   Pawel, Michelle
   Travaglini, Dustin
   Mahurin, Shannon
   Dai, Sheng
TI Metastable tetragonal phase CdWO4 nanoparticles synthesized with a
   solvothermal method
SO JOURNAL OF COLLOID AND INTERFACE SCIENCE
LA English
DT Article
DE metastable; CdWO4; nanopowders
ID TUNGSTATES; SPECTRA; MOLYBDATES; ZIRCONIA; CAMOO4; CDMOO4; CAWO4
AB CdWO4 has only previously been reported in the monoclinic, or wolframite, phase. Here we report the first metastable, tetragonal or scheelite, CdWO4 nanopowder. The tetragonal CdWO4 was synthesized by a propylene glycol solvothermal method. The scheelite phase is stabilized by a combination of high surface area and surface complexation by the propylene glycol. The CdWO4 is stable at 1 bar to 300 degrees C, and converts back to the monoclinic wolframite phase between 300 and 500 degrees C. The nanopowder exhibits cubic morphology and the average particle size of the nanopowder is around 50 nm. Published by Elsevier Inc.
C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA.
   Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
RP Rondinone, AJ (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
EM rondinoneaj@ornl.gov
RI Pawel, Michelle/Q-2729-2015; Rondinone, Adam/F-6489-2013; Dai,
   Sheng/K-8411-2015
OI Pawel, Michelle/0000-0003-0244-6703; Rondinone,
   Adam/0000-0003-0020-4612; Dai, Sheng/0000-0002-8046-3931
NR 15
TC 30
Z9 30
U1 3
U2 14
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9797
J9 J COLLOID INTERF SCI
JI J. Colloid Interface Sci.
PD FEB 15
PY 2007
VL 306
IS 2
BP 281
EP 284
DI 10.1016/j.jcis.2006.10.064
PG 4
WC Chemistry, Physical
SC Chemistry
GA 123PL
UT WOS:000243307700011
PM 17126851
ER

PT J
AU Ichinose, GA
   Goldstein, P
AF Ichinose, Gene A.
   Goldstein, Peter
TI Inversion of far-regional broadband P waves for the estimation of source
   parameters from shallow depth earthquakes
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
ID UPPER-MANTLE STRUCTURE; WESTERN UNITED-STATES; MOMENT TENSOR INVERSION;
   GENERALIZED RAY THEORY; PERIOD BODY WAVES; VELOCITY STRUCTURE; 410-KM
   DISCONTINUITY; STRUCTURE BENEATH; SEISMOGRAMS; EARTH
AB [1] Attempts in separating the earthquake source effect from complex upper mantle wave propagation effects have been unsuccessful due to band-limited World-Wide Standardized Seismograph Network data and limitations in the computation of accurate seismograms. In this study, we examine the potential for estimating source parameters using broadband P waves observed between distances of 10 degrees and 30 degrees. We used the reflectivity method, which retains all of the rays, to compute synthetic Green's functions from the Earth-flattened global AK135 and regional T7 isotropic velocity models. We applied the moment tensor inversion and iterative dislocation grid search methods to estimate seismic moment, moment tensor, focal mechanism, and focal depth for three example seismic events, the 1995 (M(w) 5.7) west Texas, 1999 (M(w) 5.6) Scotty's Junction, Nevada, and 1999 southern Iran (M(w) 4.8) earthquakes. The west Texas and Scotty's Junction earthquakes were well recorded, and they had independently established source parameters. Independent estimates from different data sets and agencies were used to validate the inversion results. We selected the southern Iran earthquake to show the utility of the method at lower magnitudes. Selected vertical and radial component seismograms were windowed about the P wave arrival, corrected for instrument response, and converted to velocity, preserving the absolute amplitudes and periods within approximately 0.5 to 100 s. Both inverse methods were successful in separating the source effect with the use of the AK135 velocity model. The inversion results using the T7 model appear slightly biased and had worse waveform fits compared to AK135. More importantly, the use of two different velocity models resulted in biases in focal depths that were less than +/- 2 km, thereby providing a robust inverse method for focal depth. Utilizing far-regional P waves would be most useful for remote earthquakes not adequately recorded locally and too small in magnitude to be recorded beyond epicentral distances of 30 degrees for teleseismic analysis.
C1 URS Corp, Pasadena, CA 91101 USA.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
RP Ichinose, GA (reprint author), URS Corp, 566 El Dorado St,2nd Floor, Pasadena, CA 91101 USA.
EM gene_ichinose@urscorp.com; peterg@llnl.gov
RI Ichinose, Gene/I-4420-2016
OI Ichinose, Gene/0000-0003-2081-9825
NR 39
TC 1
Z9 1
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD FEB 15
PY 2007
VL 112
IS B2
AR B02304
DI 10.1029/2006JB004724
PG 21
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 138PI
UT WOS:000244374300009
ER

PT J
AU Zen, K
   Chen, CXJ
   Chen, YT
   Wilton, R
   Liu, Y
AF Zen, Ke
   Chen, Celia X. -J.
   Chen, Yi-Tien
   Wilton, Rosemarie
   Liu, Yuan
TI Receptor for advanced glycation endproducts mediates neutrophil
   migration across intestinal epithelium
SO JOURNAL OF IMMUNOLOGY
LA English
DT Article
ID LEUKOCYTE INTEGRIN MAC-1; GLYCOSYLATION END-PRODUCTS; CELL-SURFACE
   RECEPTOR; NECROSIS-FACTOR-ALPHA; FACTOR-KAPPA-B; TRANSEPITHELIAL
   MIGRATION; ENDOTHELIAL-CELLS; INFLAMMATORY RESPONSES; ADHESION
   MOLECULE-1; SIGNALING EVENTS
AB Receptor for advanced glyeation endproducts (RAGE) is an Ig superfamily cell surface receptor that interacts with a diverse array of ligands associated with inflammatory responses. In this study, we provide evidence demonstrating that RAGE is involved in inflammatory responses in the intestines. We showed that RAGE is expressed in intestinal epithelial cells, primarily concentrated at the lateral membranes close to the apical cell junction complexes. Although RAGE expression was low in epithelium under normal conditions, this protein was up-regulated after treatment with the inflammatory cytokines IFN-gamma and/or TNF-alpha. RAGE expression was also elevated in colon tissue samples from patients with inflammatory bowel diseases. Using in vitro transmigration assays, we found that RAGE mediates neutrophil (polymorphonuclear leukocytes (PMN)) adhesion to, and subsequent migration across, intestinal epithelial monolayers. This activity appears to be mediated by the binding of RAGE to the PMN-specific beta(2) integrin CD11b/CD18. Thus, these results provide a novel mechanism for the regulation of PMN transepithelial migration and may suggest a new therapeutic target for intestinal inflammation.
C1 Georgia State Univ, Dept Biol, Atlanta, GA 30303 USA.
   Argonne Natl Lab, Div Biosci, Argonne, IL 60439 USA.
RP Liu, Y (reprint author), Georgia State Univ, Dept Biol, POB 4010, Atlanta, GA 30303 USA.
EM bioyxl@langate.gsu.edu
FU NIDDK NIH HHS [DK62894]
NR 65
TC 37
Z9 39
U1 1
U2 3
PU AMER ASSOC IMMUNOLOGISTS
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 0022-1767
J9 J IMMUNOL
JI J. Immunol.
PD FEB 15
PY 2007
VL 178
IS 4
BP 2483
EP 2490
PG 8
WC Immunology
SC Immunology
GA 133QF
UT WOS:000244026800058
PM 17277156
ER

PT J
AU Kemal, KS
   Burger, H
   Mayers, D
   Anastos, K
   Foley, B
   Kitchen, C
   Huggins, P
   Schroeder, T
   Picchio, G
   Back, S
   Gao, W
   Meyer, WA
   Weiser, B
AF Kemal, Kimdar Sherefa
   Burger, Harold
   Mayers, Douglas
   Anastos, Kathryn
   Foley, Brian
   Kitchen, Christina
   Huggins, Penelope
   Schroeder, Tamara
   Picchio, Gaston
   Back, Sara
   Gao, Wei
   Meyer, William A., III
   Weiser, Barbara
TI HIV-1 drug resistance in variants from the female genital tract and
   plasma
SO JOURNAL OF INFECTIOUS DISEASES
LA English
DT Article; Proceedings Paper
CT 44th Interscience Conference on Antimicrobial Agents and Chemotherapy
CY OCT 30-NOV 02, 2004
CL Washington, DC
ID HUMAN-IMMUNODEFICIENCY-VIRUS; ANTIRETROVIRAL THERAPY;
   MULTIDRUG-RESISTANT; TREATMENT INTERRUPTION; ZIDOVUDINE RESISTANCE;
   REVERSE-TRANSCRIPTASE; MINORITY POPULATIONS; INFECTED FEMALES; POL
   SEQUENCES; IN-VIVO
AB Background. Human immunodeficiency virus type 1 (HIV-1) drug-resistance mutations may arise in a fraction of viral variants, and these variants may differ between compartments, including the genital tract and blood.
   Methods. We studied 14 women with detectable HIV-1 in both the genital tract and plasma despite antiretroviral treatment. We obtained HIV-1 RNA sequences from 280 unique viral variants and then determined the resistance genotype and the predicted phenotype (Virtual Phenotype; Virco BVBA) of each variant.
   Results. Eight patients (57%) displayed mutations conferring high-level HIV-1 drug resistance. Although we observed differences in specific mutations among viral variants, 13 of the 14 women showed highly concordant HIV-1 genotypic and predicted phenotypic resistance patterns in the 2 compartments. In 1 patient, resistance mutations appeared only in plasma; all variants in her genital tract, which displayed a low viral load, were susceptible.
   Conclusions. These data suggest that, for the majority of women, determination of HIV-1 drug resistance in the plasma will approximate the drug-resistance pattern in the genital tract. Analysis of individual variants enabled us to identify minority species bearing distinctive linked mutations, which may serve as a source of novel resistance genotypes. These data are relevant to clinical management and the evolution of drug resistance.
C1 New York State Dept Hlth, Wadsworth Ctr, Albany, NY 12208 USA.
   Albany Med Coll, Dept Med, Albany, NY 12208 USA.
   Montefiore Med Ctr, Bronx, NY 10467 USA.
   Bronx Lebanon Med Ctr, Bronx, NY USA.
   Boehringer Ingelheim Pharmaceut Inc, Ridgefield, CT 06877 USA.
   Los Alamos Natl Lab, Los Alamos, NM USA.
   Univ Calif Los Angeles, Sch Publ Hlth, Dept Biostat, Los Angeles, CA 90024 USA.
   Tibotec Inc, Yardley, PA USA.
   Quest Diagnost Inc, Baltimore, MD USA.
RP Weiser, B (reprint author), New York State Dept Hlth, Wadsworth Ctr, 120 New Scotland Ave, Albany, NY 12208 USA.
EM weiser@wadsworth.org
OI Foley, Brian/0000-0002-1086-0296
FU NIAID NIH HHS [U01AI/DE35004, R01AI52015]
NR 47
TC 22
Z9 22
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0022-1899
J9 J INFECT DIS
JI J. Infect. Dis.
PD FEB 15
PY 2007
VL 195
IS 4
BP 535
EP 545
DI 10.1086/510855
PG 11
WC Immunology; Infectious Diseases; Microbiology
SC Immunology; Infectious Diseases; Microbiology
GA 127DP
UT WOS:000243565800011
PM 17230413
ER

PT J
AU Sutherland, VL
   Timlin, JA
   Nieman, LT
   Guzowski, JF
   Chawla, MK
   Worley, PF
   Roysam, B
   McNaughton, BL
   Sinclair, MB
   Barnes, CA
AF Sutherland, Vicki L.
   Timlin, Jerilyn A.
   Nieman, Linda T.
   Guzowski, John F.
   Chawla, Monica K.
   Worley, Paul F.
   Roysam, Badri
   McNaughton, Bruce L.
   Sinclair, Michael B.
   Barnes, Carol A.
TI Advanced imaging of multiple mRNAs in brain tissue using a custom
   hyperspectral imager and multivariate curve resolution
SO JOURNAL OF NEUROSCIENCE METHODS
LA English
DT Article
DE hyperspectral imaging; immediate early genes; fluorescence imaging;
   pushbroom line-imaging; multivariate image analysis; spectral unmixing
ID IMMEDIATE-EARLY GENE; EXPRESSION; ARC; HIPPOCAMPAL
AB Simultaneous imaging of multiple cellular components is of tremendous importance in the study of complex biological systems, but the inability to use probes with similar emission spectra and the time consuming nature of collecting images on a confocal microscope are prohibitive. Hyperspectral imaging technology, originally developed for remote sensing applications, has been adapted to measure multiple genes in complex biological tissues. A spectral imaging microscope was used to acquire overlapping fluorescence emissions from specific mRNAs in brain tissue by scanning the samples using a single fluorescence excitation wavelength. The underlying component spectra obtained from the samples are then separated into their respective spectral signatures using multivariate analyses, enabling the simultaneous quantitative measurement of multiple genes either at regional or cellular levels. (c) 2006 Elsevier B.V. All rights reserved.
C1 Univ Arizona, Arizona Res Labs, Div Neural Syst Memory & Aging, Tucson, AZ USA.
   Univ Arizona, Dept Psychol, Tucson, AZ 85721 USA.
   Univ Arizona, Dept Physiol, Tucson, AZ 85721 USA.
   Univ Arizona, Dept Neurol, Tucson, AZ 85721 USA.
   Sandia Natl Labs, Albuquerque, NM 87185 USA.
   Univ Calif Irvine, Irvine, CA USA.
   Johns Hopkins Univ, Baltimore, MD USA.
   Rensselaer Polytech Inst, ECSE Dept, Troy, NY USA.
RP Barnes, CA (reprint author), Univ Arizona, Arizona Res Labs, Div Neural Syst Memory & Aging, Tucson, AZ USA.
EM carol@nsma.arizona.edu
OI Timlin, Jerilyn/0000-0003-2953-1721
FU NIA NIH HHS [R01 AG003376-25, AG009219, AG018230, AG023309, R01
   AG003376, R01 AG009219, R01 AG018230, R01 AG023309]
NR 13
TC 18
Z9 18
U1 0
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0165-0270
J9 J NEUROSCI METH
JI J. Neurosci. Methods
PD FEB 15
PY 2007
VL 160
IS 1
BP 144
EP 148
DI 10.1016/j.jneumeth.2006.08.018
PG 5
WC Biochemical Research Methods; Neurosciences
SC Biochemistry & Molecular Biology; Neurosciences & Neurology
GA 136RL
UT WOS:000244241700018
PM 17049619
ER

PT J
AU Parker, JK
   Payne, WA
   Cody, RJ
   Nesbitt, FL
   Stief, LJ
   Klippenstein, SJ
   Harding, LB
AF Parker, James K.
   Payne, Walter A.
   Cody, Regina J.
   Nesbitt, Fred L.
   Stief, Louis J.
   Klippenstein, Stephen J.
   Harding, Lawrence B.
TI Direct measurement and theoretical calculation of the rate coefficient
   for Cl+CH3 in the range from T=202-298 K
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID CORRELATED MOLECULAR CALCULATIONS; COLLISIONAL ENERGY-TRANSFER;
   UNIMOLECULAR RATE THEORY; GAUSSIAN-BASIS SETS; LOW-PRESSURE-LIMIT;
   RATE-CONSTANT; TEMPERATURE-DEPENDENCE; ATOMIC CHLORINE; REACTION
   COORDINATE; MASTER EQUATION
AB The rate coefficient has been measured under pseudo-first-order conditions for the Cl + CH3 association reaction at T = 202, 250, and 298 K and P = 0.3-2.0 Torr helium using the technique of discharge-flow mass spectrometry with low-energy (12-eV) electron-impact ionization and collision-free sampling. Cl and CH3 were generated rapidly and simultaneously by reaction of F with HCl and CH4, respectively. Fluorine atoms were produced by microwave discharge in an approximately 1% mixture of F-2 in He. The decay of CH3 was monitored under pseudo-first-order conditions with the Cl-atom concentration in large excess over the CH3 concentration ([Cl](0)/[CH3](0) = 9-67). Small corrections were made for both axial and radial diffusion and minor secondary chemistry. The rate coefficient was found to be in the falloff regime over the range of pressures studied. For example, at T = 202 K, the rate coefficient increases from 8.4 x 10(-12) at P = 0.30 Torr He to 1.8 x 10(-11) at P = 2.00 Torr He, both in units of cm(3) molecule(-1) s(-1). A combination of ab initio quantum chemistry, variational transition-state theory, and master-equation simulations was employed in developing a theoretical model for the temperature and pressure dependence of the rate coefficient. Reasonable empirical representations of energy transfer and of the effect of spin-orbit interactions yield a temperature- and pressure-dependent rate coefficient that is in excellent agreement with the present experimental results. The high-pressure limiting rate coefficient from the RRKM calculations is k(2) = 6.0 x 10(-11) cm(3) molecule(-1) s(-1), independent of temperature in the range from 200 to 300 K.
C1 NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Greenbelt, MD 20771 USA.
   Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA.
   Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA.
RP Cody, RJ (reprint author), NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Greenbelt, MD 20771 USA.
EM Regina.J.Cody@nasa.gov
RI Cody, Regina/D-5996-2013; 
OI Klippenstein, Stephen/0000-0001-6297-9187
NR 71
TC 8
Z9 9
U1 0
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD FEB 15
PY 2007
VL 111
IS 6
BP 1015
EP 1023
DI 10.1021/jp066231v
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 133UO
UT WOS:000244039600004
PM 17253663
ER

PT J
AU Zhai, HJ
   Wang, LM
   Li, SD
   Wang, LS
AF Zhai, Hua-Jin
   Wang, Lei-Ming
   Li, Si-Dian
   Wang, Lai-Sheng
TI Vibrationally resolved photoelectron spectroscopy of BO- and BO2-: A
   joint experimental and theoretical study
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID DENSITY-FUNCTIONAL THEORY; MOLECULAR ELECTRON-AFFINITIES; LASER-EXCITED
   FLUORESCENCE; TRANSITION-METAL CLUSTERS; BORON CLUSTERS; AB-INITIO;
   DYE-LASER; THERMODYNAMIC PROPERTIES; IONIZATION-POTENTIALS; COMPOUND
   FORMATION
AB We report a photoelectron spectroscopy and computational study of two simple boron oxide species: BO- and BO2-. Vibrationally resolved photoelectron spectra are obtained at several photon energies (355, 266, 193, and 157 nm) for the B-10 isotopomers, (BO-)-B-10 and (BO2-)-B-10. In the spectra of (BO-)-B-10, we observe transitions to the (2)Sigma(+) ground state and the (2)Pi excited state of (BO)-B-10 at an excitation energy of 2.96 eV. The electron affinity of (BO)-B-10 is measured to be 2.510 +/- 0.015 eV. The vibrational frequencies of the ground states of (BO-)-B-10 and (BO)-B-10 and the (2)Pi excited state are measured to be 1725 +/- 40, 1935 +/- 30, and 1320 +/- 40 cm(-1), respectively. For (BO2-)-B-10, we observe transitions to the (2)Pi(g) ground state and two excited states of (BO2)-B-10, (2)Pi(u), and (2)Sigma(+)(u), at excitation energies of 2.26 and 3.04 eV, respectively. The electron affinity of (BO2)-B-10 is measured to be 4.46 +/- 0.03 eV and the symmetrical stretching vibrational frequency of the (2)Pi(u) excited state of (BO2)-B-10 is measured to be 980 +/- 30 cm(-1). Both density functional and ab initio calculations are performed to elucidate the electronic structure and chemical bonding of the two boron oxide molecules. Comparisons with the isoelectronic AlO- and AlO2- species and the closely related molecules CO, N-2, CN-, and CO2 are also discussed.
C1 Xinzhou Teachers Univ, Dept Chem, Xinzhou 034000, Shanxi, Peoples R China.
   Xinzhou Teachers Univ, Inst Mat Sci, Xinzhou 034000, Shanxi, Peoples R China.
   Washington State Univ, Dept Phys, Richland, WA 99354 USA.
   Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA.
RP Li, SD (reprint author), Xinzhou Teachers Univ, Dept Chem, Xinzhou 034000, Shanxi, Peoples R China.
EM lisidian@yahoo.com; ls.wang@pnl.gov
RI Wang, Leiming/A-3937-2011
NR 74
TC 101
Z9 104
U1 2
U2 20
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD FEB 15
PY 2007
VL 111
IS 6
BP 1030
EP 1035
DI 10.1021/jp0666939
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 133UO
UT WOS:000244039600006
PM 17253668
ER

PT J
AU Dou, YS
   Lei, YB
   Li, AY
   Wen, ZY
   Torralva, BR
   Lo, GV
   Allen, RE
AF Dou, Yusheng
   Lei, Yibo
   Li, Anyang
   Wen, Zhenyi
   Torralva, Ben R.
   Lo, Glenn V.
   Allen, Roland E.
TI Detailed dynamics of the photodissociation of cyclobutane
SO JOURNAL OF PHYSICAL CHEMISTRY A
LA English
DT Article
ID THERMAL-DECOMPOSITION; TRANSITION-STATE; TETRAMETHYLENE; FEMTOSECOND;
   ROTATION
AB Semiclassical electron-radiation-ion dynamics simulations are reported for the photodissociation of cyclobutane into two molecules of ethylene. The results clearly show the formation of the tetramethylene intermediate diradical, with dissociation completed in similar to 400 fs. In addition, the potential energy surfaces of the electronic ground state and lowest excited-state were calculated at the complete-active-space self-consistent-field/multireference second-order perturbation theory (CASSCF/MRPT2) level with 6-31G* basis sets, along the reaction path determined by the dynamics simulations. There are well-defined energy minima and maxima in the intermediate state region. It is found that both C-C-C bond bending and rotation of the molecule (around the central C-C bond) have important roles in determining the features of the potential energy surfaces for the intermediate species. Finally, the simulations and potential energy surface calculations are applied together in a discussion of the full mechanism for cyclobutane photodissociation.
C1 Chongqing Univ Posts & Telecommun, Bioinformat Inst, Chongqing 400065, Peoples R China.
   Nicholls State Univ, Dept Phys Sci, Thibodaux, LA 70310 USA.
   NW Univ Xian, Modern Phys Inst, Xian 710069, Peoples R China.
   Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA.
RP Dou, YS (reprint author), Chongqing Univ Posts & Telecommun, Bioinformat Inst, Chongqing 400065, Peoples R China.
EM Yusheng.Dou@nicholls.edu
RI Li, Anyang/J-2138-2016
OI Li, Anyang/0000-0001-6634-842X
NR 30
TC 17
Z9 17
U1 1
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1089-5639
J9 J PHYS CHEM A
JI J. Phys. Chem. A
PD FEB 15
PY 2007
VL 111
IS 6
BP 1133
EP 1137
DI 10.1021/jp066422y
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA 133UO
UT WOS:000244039600020
PM 17253665
ER

PT J
AU Tamam, L
   Kraack, H
   Sloutskin, E
   Ocko, BM
   Pershan, PS
   Ofer, E
   Deutsch, M
AF Tamam, L.
   Kraack, H.
   Sloutskin, E.
   Ocko, B. M.
   Pershan, P. S.
   Ofer, E.
   Deutsch, M.
TI Langmuir films of anthracene derivatives on liquid mercury I: Symmetric
   molecules
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID X-RAY REFLECTIVITY; PENTACENE THIN-FILMS; ORGANIC TRANSISTORS;
   NORMAL-ALKANES; PHASE-DIAGRAM; SURFACE; MONOLAYERS; GROWTH; DIFFRACTION;
   WATER
AB The structure and phase sequence of liquid-mercury-supported Langmuir films (LFs) of two symmetric acenes, anthracene and anthraquinone, were studied by surface tensiometry and X-ray diffraction. At low coverage, both form a monolayer of surface-parallel, flat-lying, molecules. At high coverage, we find a monolayer of side-lying molecules, where the molecular plane is surface-normal, and the molecular long axis is surfaceparallel. None of these phases exhibit long-range in-plane order.
C1 Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
   Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   Harvard Univ, DEAS, Cambridge, MA 02138 USA.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Deutsch, M (reprint author), Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
EM deutsch@mail.biu.ac.il
NR 58
TC 9
Z9 9
U1 1
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 15
PY 2007
VL 111
IS 6
BP 2573
EP 2579
DI 10.1021/jp063936o
PG 7
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 147LY
UT WOS:000245005700033
ER

PT J
AU Tamam, L
   Kraack, H
   Sloutskin, E
   Ocko, BM
   Pershan, PS
   Ofer, E
   Deutsch, M
AF Tamam, L.
   Kraack, H.
   Sloutskin, E.
   Ocko, B. M.
   Pershan, P. S.
   Ofer, E.
   Deutsch, M.
TI Langmuir films of anthracene derivatives on liquid mercury II:
   Asymmetric molecules
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID QUANTUM-CHEMICAL CALCULATIONS; X-RAY; NORMAL-ALKANES; SURFACE;
   MONOLAYERS; ANTHRALIN; ANTHRONE; REFINEMENT; GROWTH
AB The structure and phase sequence of liquid-mercury-supported Langmuir films (LFs) of anthrone and anthralin were studied by surface tensiometry and surface- specific synchrotron X-ray diffraction. In the low-coverage phase the molecules are both side-lying, rather than the flat-lying orientation found for anthracene and anthraquinone. In the high-coverage phase, the molecules are either standing up (anthrone) or remain side-lying (anthralin) on the mercury surface. In contrast with the symmetric anthracene and anthraquinone, both high-coverage phases exhibit long-range in-plane order. The order is different for the two compounds. The structural details, the role of molecular symmetry, the oxygen side groups, and the asymmetry-induced dipole moments are discussed.
C1 Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
   Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   Harvard Univ, DEAS, Cambridge, MA 02138 USA.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Deutsch, M (reprint author), Bar Ilan Univ, Dept Phys, IL-52900 Ramat Gan, Israel.
EM deutsch@mail.biu.ac.il
NR 26
TC 7
Z9 7
U1 2
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 15
PY 2007
VL 111
IS 6
BP 2580
EP 2587
DI 10.1021/jp063937g
PG 8
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 147LY
UT WOS:000245005700034
ER

PT J
AU Szanyi, J
   Kwak, JH
   Chimentao, RJ
   Peden, CHF
AF Szanyi, Janos
   Kwak, Ja Hun
   Chimentao, Ricardo J.
   Peden, Charles H. F.
TI Effect of H2O on the adsorption of NO2 on gamma-Al2O3: an in situ
   FTIR/MS study
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID IR SPECTROSCOPY; OXIDE PARTICLES; AL2O3; REDUCTION; WATER;
   IDENTIFICATION; CATALYSTS; STORAGE; TPD
AB The effect of water on the adsorption of NO2 onto a gamma-Al2O3 catalyst support surface was investigated using Fourier transform infrared spectroscopy (FTIR) and mass spectrometry (MS). Upon room-temperature exposure of the alumina surface to small amounts of NO2, nitrites and nitrates are formed, and at higher NO2 doses only nitrates are observed. The surface nitrates formed were of bridging monodentate, bridging bidentate, and monodentate configuration. At elevated NO2 pressures, the surface hydroxyls were consumed in their reaction with NO2 giving primarily bridge-bound nitrates. A significant amount of weakly adsorbed N2O3 was seen as well. Exposure of the NO2-saturated gamma-Al2O3 surface to H2O resulted in the desorption of some NO2 + NO as H2O interacted with the weakly held N2O3, while the bridging monodentate surface nitrates converted into monodentate nitrates. The conversion of these oxide-bound nitrates to water-solvated nitrates was observed at high water doses when the presence of liquid-like water is expected on the surface. The addition of H2O to the NO2-saturated gamma-Al2O3 did not affect the amount of NO, strongly adsorbed on the support surface. In particular, no NO, desorption was observed when the NO2-saturated sample was heated to 573 K prior to room-temperature H2O exposure. The effect of water is completely reversible; i.e., during temperature-programmed desorption (TPD) experiments following NO2 and H2O coadsorption, the same IR spectra were observed at temperatures above that required for H2O desorption as seen for NO2 adsorption only experiments.
C1 Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
RP Szanyi, J (reprint author), Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA.
EM janos.szanyi@pnl.gov
RI Kwak, Ja Hun/J-4894-2014; 
OI Peden, Charles/0000-0001-6754-9928
NR 21
TC 62
Z9 62
U1 2
U2 27
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 15
PY 2007
VL 111
IS 6
BP 2661
EP 2669
DI 10.1021/jp066326x
PG 9
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 147LY
UT WOS:000245005700043
ER

PT J
AU Doherty, WJ
   Friedlein, R
   Salaneck, WR
AF Doherty, Walter J., III
   Friedlein, Rainer
   Salaneck, William R.
TI Layer-by-layer deposition of copper phthalocyanine from aqueous
   solution: Molecular orientation, ordering parameters, and electronic
   structure
SO JOURNAL OF PHYSICAL CHEMISTRY C
LA English
DT Article
ID ANGLE-RESOLVED PHOTOEMISSION; ATOMIC-FORCE MICROSCOPY; ULTRAVIOLET
   PHOTOELECTRON-SPECTROSCOPY; SELF-ASSEMBLED MULTILAYERS; ULTRATHIN
   POLYMER-FILMS; X-RAY REFLECTIVITY; INDIUM-TIN OXIDE; THIN-FILMS;
   POLYELECTROLYTE ADSORPTION; ELECTROSTATIC INTERACTIONS
AB Highly ordered, multilayer films composed of alternating, oppositely charged, polyionic copper phthalocyanines were prepared on HOPG [0001] substrates via layer-by-layer deposition from aqueous solution and characterized by scanning force microscopy and photoelectron spectroscopies. In films of up to four layers, individual layers alternate. Angle-resolved ultraviolet photoelectron spectra are consistent with a molecular orientation parallel to the substrate surface and indicate that structural order is reduced with film thickness.
C1 Linkoping Univ, Dept Phys Chem & Biol, IFM, S-58183 Linkoping, Sweden.
RP Doherty, WJ (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA.
EM walter_doherty@nrel.gov
NR 68
TC 12
Z9 13
U1 1
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1932-7447
J9 J PHYS CHEM C
JI J. Phys. Chem. C
PD FEB 15
PY 2007
VL 111
IS 6
BP 2724
EP 2729
DI 10.1021/jp0671289
PG 6
WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science,
   Multidisciplinary
SC Chemistry; Science & Technology - Other Topics; Materials Science
GA 147LY
UT WOS:000245005700053
ER

PT J
AU Qiu, W
   Pyda, M
   Nowak-Pyda, E
   Haenschuss, A
   Wunderlich, B
AF Qiu, W.
   Pyda, M.
   Nowak-Pyda, E.
   Haenschuss, A.
   Wunderlich, B.
TI Reversible melting and crystallization of high-molar-mass
   poly(oxyethylene)
SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
LA English
DT Article
DE crystal glass transition; differential scanning calorimetry (DSC); glass
   transition; poly(oxyethylene); reversible melting; temperature
   modulation; thermodynamics; X-ray diffraction
ID POLY(ETHYLENE OXIDE) FRACTIONS; TEMPERATURE-MODULATED CALORIMETRY;
   FOLDING CRYSTAL-GROWTH; DIFFERENTIAL SCANNING CALORIMETRY;
   POLY-ETHYLENE-OXIDE; THINNING PROCESSES; SINGLE-CRYSTALS; HEAT-CAPACITY;
   THERMODYNAMIC PROPERTIES; MOLECULAR SEGREGATION
AB The heat capacity of poly(oxyethylene) (POE) with a molar mass of 900,000 Da has been analyzed with differential scanning calorimetry and quasi-isothermal, temperature-modulated differential scanning calorimetry. The crystal structure, lattice parameters, and coherently scattering domain sizes have been measured with wide-angle X-ray diffraction as a function of temperature. The high-molar-mass POE crystals are in a folded-chain macroconformation and show some locally reversible melting starting already at about 250 K. At 335 K, the thermodynamic heat capacity reaches the level of the melt. The reversible crystallinity depends on the modulation amplitude and has been varied in the melting range from +/- 0.2 to +/- 3.0 K. Before melting, there is neither a change in the crystal structure nor a change in the domain size, but the expansivity of the crystals increases at about 320 K. These observations support the interpretation that the monoclinic POE crystals possess a glass transition temperature with a midpoint at about 324 K, whereas the maximum melting temperature is 341 K. (c) 2007 Wiley Periodicals, Inc.
C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
   Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA.
RP Wunderlich, B (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA.
EM wunderlich@chartertn.net
NR 48
TC 7
Z9 8
U1 0
U2 7
PU JOHN WILEY & SONS INC
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN, NJ 07030 USA
SN 0887-6266
J9 J POLYM SCI POL PHYS
JI J. Polym. Sci. Pt. B-Polym. Phys.
PD FEB 15
PY 2007
VL 45
IS 4
BP 475
EP 489
DI 10.1002/polb.21067
PG 15
WC Polymer Science
SC Polymer Science
GA 133KW
UT WOS:000244012800010
ER

PT J
AU Olsen, LM
   Dale, VH
   Foster, T
AF Olsen, Lisa Mai
   Dale, Virginia H.
   Foster, Thomas
TI Landscape patterns as indicators of ecological change at Fort Benning,
   Georgia, USA
SO LANDSCAPE AND URBAN PLANNING
LA English
DT Article
DE endangered species; habitat; land-cover change; land use; landscape
   metrics; presettlement vegetation; pine forests; remote sensing; witness
   trees
ID TREE SPECIES COMPOSITION; LAND OFFICE SURVEY; PINUS-PALUSTRIS; FOREST
   CHANGE; NEW-ENGLAND; COVER; VEGETATION; CLASSIFICATION; FLORIDA; GROWTH
AB This research examined landscape indicators that signal ecological change in both intensely used and lightly used lands at Fort Benning, Georgia. Changes in patterns of land cover through time affect the ecological system by altering the proportion and distribution of habitats for species that these cover types support. Landscape patterns, therefore, are important indicators of land-use impacts, past and present, upon the landscape. This analysis of landscape pattern began with a landscape characterization based on witness tree data from 1827 and the 1830s and remotely sensed data from 1974, 1983 199 1, and 1999. The data from the early 1800s, although coarse, were useful in characterizing the historical range of variability in ecological conditions for the area. The steps for the analysis involved the creation of a land-cover database and a time series of land-cover maps, computation of landscape metrics, and evaluation of changes in those metrics over time as evidenced in the land-cover maps. We focused on five cover types (bare/developed land, deciduous forest, mixed forest, pine forest, and non-forest vegetated land), for they reveal information important to resources management at Fort Benning. An examination of land-cover class and landscape metrics, computed from the maps, indicated that a suite of metrics adequately describes the charging landscape at Fort Benning, Georgia. The most appropriate metrics were percent cover, total edge (km), number of patches, descriptors of patch area, nearest neighbor distance, the mean perimeter-to-area ratio, shape range, and clumpiness. Identification of such ecological indicators is an important component Of building an effective environmental monitoring system. (c) 2006 Elsevier B.V. All rights reserved.
C1 Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   No Kentucky Univ, Dept Anthropol, Highland Hts, KY 41099 USA.
RP Dale, VH (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA.
EM olsenlm@ornl.gov; dalevh@ornl.gov; tfoster@bheenvironmental.com
NR 83
TC 26
Z9 33
U1 4
U2 28
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-2046
J9 LANDSCAPE URBAN PLAN
JI Landsc. Urban Plan.
PD FEB 15
PY 2007
VL 79
IS 2
BP 137
EP 149
DI 10.1016/j.landurbplan.2006.02.007
PG 13
WC Ecology; Environmental Studies; Geography; Geography, Physical; Urban
   Studies
SC Environmental Sciences & Ecology; Geography; Physical Geography; Urban
   Studies
GA 134SO
UT WOS:000244104500003
ER

PT J
AU Wall, JJ
   Weber, R
   Kim, J
   Liaw, PK
   Choo, H
AF Wall, J. J.
   Weber, R.
   Kim, J.
   Liaw, P. K.
   Choo, H.
TI Aerodynamic levitation processing of a Zr-based bulk metallic glass
SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES
   MICROSTRUCTURE AND PROCESSING
LA English
DT Article
DE metallic glasses; critical cooling rate
ID ELECTROSTATIC LEVITATOR; CRYSTALLIZATION; ALLOYS; VISCOSITY
AB Containerless aerodynamic levitation was used to produce the bulk metallic glass Zr57Ti5Ni8CU20Al10. Samples were processed from the liquid state at cooling rates in the range of 69-1.2 K/s. The alloy was found to vitrify at cooling rates from 69 to 11 K/s and recalesced at the slower cooling rates. X-ray diffraction confirmed that the specimens processed faster than the critical cooling rate were primarily amorphous. The processing method and its applicability to other systems are discussed. (c) 2006 Elsevier B.V. All rights reserved.
C1 Los Alamos Natl Lab, LANSCE LC, Los Alamos, NM 87545 USA.
   Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA.
   Containerless Res Inc, Evanston, IL 60202 USA.
   Oak Ridge Natl Lab, Mat Sci & Tech Div, Oak Ridge, TN 37831 USA.
RP Wall, JJ (reprint author), Los Alamos Natl Lab, LANSCE LC, Tech Area 53,Mail Stop H805, Los Alamos, NM 87545 USA.
EM jwall@lanl.gov
RI Choo, Hahn/A-5494-2009
OI Choo, Hahn/0000-0002-8006-8907
NR 19
TC 14
Z9 14
U1 2
U2 17
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0921-5093
J9 MAT SCI ENG A-STRUCT
JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process.
PD FEB 15
PY 2007
VL 445
BP 219
EP 222
DI 10.1016/j.msea.2006.09.014
PG 4
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
   Metallurgical Engineering
GA 137OI
UT WOS:000244301500028
ER

PT J
AU Blumenfeld, I
   Clayton, CE
   Decker, FJ
   Hogan, MJ
   Huang, CK
   Ischebeck, R
   Iverson, R
   Joshi, C
   Katsouleas, T
   Kirby, N
   Lu, W
   Marsh, KA
   Mori, WB
   Muggli, P
   Oz, E
   Siemann, RH
   Walz, D
   Zhou, MM
AF Blumenfeld, Ian
   Clayton, Christopher E.
   Decker, Franz-Josef
   Hogan, Mark J.
   Huang, Chengkun
   Ischebeck, Rasmus
   Iverson, Richard
   Joshi, Chandrashekhar
   Katsouleas, Thomas
   Kirby, Neil
   Lu, Wei
   Marsh, Kenneth A.
   Mori, Warren B.
   Muggli, Patric
   Oz, Erdem
   Siemann, Robert H.
   Walz, Dieter
   Zhou, Miaomiao
TI Energy doubling of 42 GeV electrons in a metre-scale plasma wakefield
   accelerator
SO NATURE
LA English
DT Article
ID BEAMS; CHANNEL; WAVES
AB The energy frontier of particle physics is several trillion electron volts, but colliders capable of reaching this regime ( such as the Large Hadron Collider and the International Linear Collider) are costly and time-consuming to build; it is therefore important to explore new methods of accelerating particles to high energies. Plasma-based accelerators are particularly attractive because they are capable of producing accelerating fields that are orders of magnitude larger than those used in conventional colliders(1-3). In these accelerators, a drive beam ( either laser or particle) produces a plasma wave (wakefield) that accelerates charged particles(4-11). The ultimate utility of plasma accelerators will depend on sustaining ultrahigh accelerating fields over a substantial length to achieve a significant energy gain. Here we show that an energy gain of more than 42 GeV is achieved in a plasma wakefield accelerator of 85 cm length, driven by a 42 GeV electron beam at the Stanford Linear Accelerator Center (SLAC). The results are in excellent agreement with the predictions of three-dimensional particle-in-cell simulations. Most of the beam electrons lose energy to the plasma wave, but some electrons in the back of the same beam pulse are accelerated with a field of similar to 52 GV m(-1). This effectively doubles their energy, producing the energy gain of the 3-km-long SLAC accelerator in less than a metre for a small fraction of the electrons in the injected bunch. This is an important step towards demonstrating the viability of plasma accelerators for high-energy physics applications.
C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA.
   Univ Calif Los Angeles, Los Angeles, CA 90095 USA.
   Univ So Calif, Los Angeles, CA 90089 USA.
RP Joshi, C (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
EM joshi@ee.ucla.edu
RI Lu, Wei/F-2504-2016
NR 22
TC 313
Z9 314
U1 12
U2 55
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD FEB 15
PY 2007
VL 445
IS 7129
BP 741
EP 744
DI 10.1038/nature05538
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 136EK
UT WOS:000244205200039
PM 17301787
ER

PT J
AU Ullrich, T
AF Ullrich, Thomas
TI Zooming in on the quark gluon plasma
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Hard and Electromagnetic Probes of
   High-Energy Nuclear Collisions
CY JUN 09-16, 2006
CL Pacific Grove q, CA
ID ELLIPTIC FLOW; TRANSVERSE ENERGIES; NUCLEAR COLLISIONS; QCD;
   MULTIPLICITIES; THERMALIZATION; MATTER
AB Over the last thirty years, heavy ion experiments have recorded a wealth of data ranging from collisions of nuclei from root s(NN) = 2 GeV up to the highest energy of 200 GeV as provided by the Relativistic Heavy Ion Collider, RHIC. It is at these high energies that the predictions of QCD come into play and new phenomena are sought that may illuminate our view of the basic structure of matter.
   Measurements at RHIC have revealed compelling evidence for the existence of a new form of nuclear matter at extremely high densities and temperatures. This medium allows for the predictions of QCD to be tested, and new phenomena explored, under conditions where the relevant degrees of freedom, over nuclear volumes are expected to be those of quarks and gluons, rather than of hadrons. This is the realm of the quark gluon plasma.
   However, detailed analyses of the data also make it clear that this hot, dense medium has properties that are surprising, and not yet fully understood in terms of the early expectations for the quark qluon plasma. In this talk I give a brief review of the major findings and discuss the current understanding of the state of matter created.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Ullrich, T (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
NR 50
TC 0
Z9 0
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD FEB 15
PY 2007
VL 783
BP 1C
EP 12C
DI 10.1016/j.nuclphysa.2006.11.012
PG 12
WC Physics, Nuclear
SC Physics
GA 141JK
UT WOS:000244574400002
ER

PT J
AU Karsch, F
AF Karsch, Frithjof
TI Properties of the quark gluon plasma: A lattice perspective
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Hard and Electromagnetic Probes of
   High-Energy Nuclear Collisions
CY JUN 09-16, 2006
CL Pacific Grove q, CA
ID FINITE-TEMPERATURE; QCD; THERMODYNAMICS; COLLABORATION; COLLISIONS;
   PRESSURE
AB We discuss results from lattice calculations for a few observables that are sensitive to different length scales in the high temperature phase of QCD and can give insight into its non-perturbative structure. We compare lattice results with perturbative calculations at high temperature obtained for vanishing and non-vanishing quark chemical potential.
C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Karsch, F (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
EM karsch@bnl.gov
NR 28
TC 13
Z9 13
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD FEB 15
PY 2007
VL 783
BP 13C
EP 22C
DI 10.1016/j.nuclphysa.2006.11.035
PG 10
WC Physics, Nuclear
SC Physics
GA 141JK
UT WOS:000244574400003
ER

PT J
AU Vitev, I
AF Vitev, Ivan
TI PQCD approach to parton propagation in matter
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Hard and Electromagnetic Probes of
   High-Energy Nuclear Collisions
CY JUN 09-16, 2006
CL Pacific Grove q, CA
ID ABELIAN ENERGY-LOSS
AB We review recent theoretical developments in underhstanding the many-body perturbative QCD dynamics of strongly-interacting hard probes in dense nuclear matter. The relation between initial- and final-state parton scattering in nuclei and the quark-gluon plasma and experimental measurements of the Cronin effect, nuclear shadowing, jet quenching, modified di-hadron corroelations and forward rapidity particle suppression in p+A mid A+A reactions is clarified. Our approach emphamsizes the proccss dependence of nuclear effects and outlines the techniques for their dynamical calculation and incorporation in simulations that build upon collinear. factorization in QCD.
C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA.
   Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA.
RP Vitev, I (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA.
EM ivitev@lanl.gov
NR 17
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD FEB 15
PY 2007
VL 783
BP 31C
EP 38C
DI 10.1016/j.nuclphysa.2006.11.011
PG 8
WC Physics, Nuclear
SC Physics
GA 141JK
UT WOS:000244574400005
ER

PT J
AU van Leeuwen, M
AF van Leeuwen, Marco
TI Comparison of 3-particle correlation methods
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Hard and Electromagnetic Probes of
   High-Energy Nuclear Collisions
CY JUN 09-16, 2006
CL Pacific Grove, CA
AB Three-particle azimuthal correlations can be used to explore the away-side structure of jets in heavy ion collisions. The combinatorial background in such measurements has angular structure similar to the signal. The paper discusses two different techniques for subtracting the backgrounds. A simple simulation model is used for illustration. A brief review of the current experimental results is also given.
C1 Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP van Leeuwen, M (reprint author), Lawrence Berkeley Lab, Div Nucl Sci, MS 70R0319, Berkeley, CA 94720 USA.
OI van Leeuwen, Marco/0000-0002-5222-4888
NR 13
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
EI 1873-1554
J9 NUCL PHYS A
JI Nucl. Phys. A
PD FEB 15
PY 2007
VL 783
BP 109C
EP 116C
DI 10.1016/j.nuclphysa.2006.11.038
PG 8
WC Physics, Nuclear
SC Physics
GA 141JK
UT WOS:000244574400013
ER

PT J
AU Gelis, F
   Venugopalan, R
AF Gelis, Francois
   Venugopalan, Raju
TI Multi-particle production at LO and NLO in AA collisions
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Hard and Electromagnetic Probes of
   High-Energy Nuclear Collisions
CY JUN 09-16, 2006
CL Pacific Grove q, CA
ID COLOR GLASS CONDENSATE; GLUON DISTRIBUTION-FUNCTIONS; NUCLEAR
   COLLISIONS; EVOLUTION
AB In this talk, we discuss general properties of particle production in field theories coupled to strong time dependent sources and describe techniques to compute the spectrum of the produced particles in such theories. We also discuss the application of these results to the description of hadron or heavy ion collisions in the Color Glass Condensate framework.
C1 CEA Saclay, CNRS, URA 2306, DSM,Serv Phys Theor, F-91191 Gif Sur Yvette, France.
   Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA.
RP Gelis, F (reprint author), CEA Saclay, CNRS, URA 2306, DSM,Serv Phys Theor, F-91191 Gif Sur Yvette, France.
NR 19
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD FEB 15
PY 2007
VL 783
BP 149C
EP 156C
DI 10.1016/j.nuclphysa.2006.11.006
PG 8
WC Physics, Nuclear
SC Physics
GA 141JK
UT WOS:000244574400018
ER

PT J
AU Xu, N
AF Xu, Nu
TI Heavy flavor measurements at RHIC in the near future
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Hard and Electromagnetic Probes of
   High-Energy Nuclear Collisions
CY JUN 09-16, 2006
CL Pacific Grove q, CA
ID FINITE-TEMPERATURE; LATTICE QCD
AB We discuss the recent results on open charm measurements at RHIC. The heavy flavor upgrade program for both PHENIX and STAR experiments are briefly discussed. The completion of the program will yield important information on light flavor thermalization of the partonic matter created in high-energy nuclear collisious at RHIC. A new era of RHIC is ahead of us with the progress of the upgrade program.
C1 Lawrence Berkeley Natl Lab, Div Nucl Sci, Berkeley, CA 94720 USA.
RP Xu, N (reprint author), Lawrence Berkeley Natl Lab, Div Nucl Sci, MS 70R0319, Berkeley, CA 94720 USA.
NR 18
TC 0
Z9 0
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD FEB 15
PY 2007
VL 783
BP 241C
EP 248C
DI 10.1016/j.nuclphysa.2006.11.080
PG 8
WC Physics, Nuclear
SC Physics
GA 141JK
UT WOS:000244574400030
ER

PT J
AU Umeda, T
AF Umeda, Takashi
TI Quarkonium at finite teniperature
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT 2nd International Conference on Hard and Electromagnetic Probes of
   High-Energy Nuclear Collisions
CY JUN 09-16, 2006
CL Pacific Grove, CA
ID LATTICE QCD; DECONFINEMENT; TEMPERATURE; SUPPRESSION; CHARMONIUM;
   TRANSITION
AB Lattice QCD studies on charmonium at finite temperature are presented. After a discussion about problems for the Maximum Entropy Method applied to finite temperature lattice QCD. I show several results on charmonium spectral functions. The "wave function" of charmonium is also discussed to study the spatial correlation between quark and anti-quark in deconfinement phase.
C1 Brookhaven Natl Lab, Upton, NY 11973 USA.
RP Umeda, T (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
EI 1873-1554
J9 NUCL PHYS A
JI Nucl. Phys. A
PD FEB 15
PY 2007
VL 783
BP 277C
EP 284C
DI 10.1016/j.nuclphysa.2006.11.050
PG 8
WC Physics, Nuclear
SC Physics
GA 141JK
UT WOS:000244574400034
ER

EF