FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Moriarty, JA Widom, M AF Moriarty, JA Widom, M TI First-principles interatomic potentials for transition-metal aluminides: Theory and trends across the 3d series SO PHYSICAL REVIEW B LA English DT Article ID GENERALIZED PSEUDOPOTENTIAL THEORY; DENSITY-FUNCTIONAL FORMULATION; RICH COBALT COMPOUNDS; HUME-ROTHERY ALLOYS; ELECTRONIC-STRUCTURE; INTERMETALLIC COMPOUNDS; RELATIVE STABILITY; AL; 1ST-PRINCIPLES; DO22 AB In this paper the first-principles generalized pseudopotential theory (GPT) of transition-metal interatomic potentials [J. A. Moriarty, Phys. Rev. B 38, 3199 (1988)] is extended to AB binary compounds and alloys. For general transition-metal (TM) systems, the GPT total-energy functional involves a volume term, central-force pair potentials, and angular-force multi-ion potentials, which are both volume (Omega) and concentration (x) dependent and include all sp, sp-d, and d-d interactions within local density-functional quantum mechanics. The formalism is developed here in detail for intermetallic systems where A is a simple metal and B is a transition metal and applied to the prominent special case of the transition-metal aluminides TMxAl1-x, where sp-d hybridization is especially important. Emphasis is given to the aluminum-rich 3d binary systems for x < 0.30, which appear to be well described at the pair-potential level without angular forces and for which the present GPT potentials can be used directly in atomistic simulations. Volume terms and pair potentials for all of the 3d aluminides have been calculated and their behavior with atomic number, Omega, and x is elaborated through illustrative applications to the cohesive and structural trends across the 3d series. More extensive applications to the Co-Al and Ni-Al phase diagrams will be given elsewhere. C1 CARNEGIE MELLON UNIV, DEPT PHYS, PITTSBURGH, PA 15213 USA. RP LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. RI Widom, Michael/P-2531-2014 OI Widom, Michael/0000-0001-5972-5696 NR 34 TC 61 Z9 62 U1 0 U2 6 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 OCT 1 PY 1997 VL 56 IS 13 BP 7905 EP 7917 DI 10.1103/PhysRevB.56.7905 PG 13 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600040 ER PT J AU Hansen, PC Leask, MJM Wanklyn, BM Sun, Y Cone, RL Abraham, MM AF Hansen, PC Leask, MJM Wanklyn, BM Sun, Y Cone, RL Abraham, MM TI Spectral hole burning and optically detected nuclear quadrupole resonance in flux-grown stoichiometric europium vanadate crystals SO PHYSICAL REVIEW B LA English DT Article ID GROUND ELECTRONIC STATE; TRIVALENT EUROPIUM; SPECTROSCOPY; CENTERS; CAF2; TIME AB Earlier work [Cone et al., J. Phys. C 17, 3101 (1984); Cone et al., J. Phys.; Condens. Matter 5, 573 (1993)] on EuVO4 has described the fluorescence excitation spectra associated with the large number of defect sites (> 50) previously discovered in this material. To establish which if any of the defect sites were intrinsic to the EuVO4 crystal structure rather than being dependent on particular growth procedures, EuVO4 crystals were prepared from fluxes with different compositions. The present work extends this study, using the techniques of spectral hole burning and optical detection of nuclear quadrupole resonance to examine at much higher precision the degree to which the defect spectra associated with the various crystal growths are identical, and to attempt a preliminary correlation of such spectra with the methods of crystal growth. We discuss the relative importance of the lattice and electronic contributions to the ground-state quadrupole that the electronic contribution is almost always larger than the lattice contribution. The data also allow conclusions to be drawn regarding the relative importance of pseudoquadrupolar effects in the spectra and they are found to be small. This work forms a basis for detailed study of particular defect sites to be discussed in further papers. C1 MONTANA STATE UNIV,DEPT PHYS,BOZEMAN,MT 59717. OAK RIDGE NATL LAB,OAK RIDGE,TN. RP Hansen, PC (reprint author), UNIV OXFORD,CLARENDON LAB,PARKS RD,OXFORD OX1 3PU,ENGLAND. RI Hansen, Peter/F-3163-2010 OI Hansen, Peter/0000-0002-4948-1007 NR 33 TC 9 Z9 9 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 7918 EP 7929 DI 10.1103/PhysRevB.56.7918 PG 12 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600041 ER PT J AU Nguyen, AD Murdoch, K Edelstein, N Boatner, LA Abraham, MM AF Nguyen, AD Murdoch, K Edelstein, N Boatner, LA Abraham, MM TI Polarization dependence of phonon and electronic Raman intensities in PrVO4 and NdVO4 SO PHYSICAL REVIEW B LA English DT Article ID 2-PHOTON ABSORPTION-LINES; RARE-EARTH IONS; THEORETICAL REPRODUCTION; CERIUM IONS; OPERATOR FORMULATION; ASYMMETRY FEATURES; 3RD-ORDER; SPECTRA; SCATTERING; FIELD AB The polarization behavior of the phonon and electronic Raman intensifies in PrVO4 and NdVO4 has been measured. These experimental intensities are compared with the intensities predicted by a polarization dependent intensity theory. Good agreement was found between theory and experiment. The fitted values of the ratio F-1/F-2 for PrVO4 and NdVO4 were found to be 1.0 and 0.48, respectively. The relative values of the alpha(q)(t) parameters obtained from the fit were compared with theoretical values which were derived using both second-and third-order theory, where the latter included the spin-orbit interaction. Axe's second-order theory was found to adequately explain the relative intensities of electronic Raman transitions in PrVO4 and NdVO4. C1 UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA. RP UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA. OI Boatner, Lynn/0000-0002-0235-7594 NR 31 TC 10 Z9 10 U1 0 U2 1 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 OCT 1 PY 1997 VL 56 IS 13 BP 7974 EP 7987 DI 10.1103/PhysRevB.56.7974 PG 14 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600048 ER PT J AU Cornelius, AL Lawrence, JM Sarrao, JL Fisk, Z Hundley, MF Kwei, GH Thompson, JD Booth, CH Bridges, F AF Cornelius, AL Lawrence, JM Sarrao, JL Fisk, Z Hundley, MF Kwei, GH Thompson, JD Booth, CH Bridges, F TI Experimental studies of the phase transition in YbIn1-xAgxCu4 SO PHYSICAL REVIEW B LA English DT Article ID KONDO VOLUME-COLLAPSE; X-RAY-DIFFRACTION; VALENCE TRANSITION; HIGH-PRESSURE; YBINCU4; YBXIN1-XCU2; EXPANSION; NEUTRON; CE AB We report measurements of the low-temperature specific-heat coefficient gamma = C-p(T)/T, cell volume V(T), Hall coefficient R-H(T), and valence z = 2 + n(f) [where the Yb hole occupation n(f)(T) was determined from Yb-L-3 x-ray absorption] of single crystals of YbIn1-xAgxCu4. Alloying YbInCu4 with Ag increases the temperature T-s(x) of the first-order isomorphic phase transition and causes it to terminate at a critical point at x(c) = 0.195 and T-c = 77 K. The variation of V(T) near the critical point is well described by a mean-field equation of state. The phase transition involves a large change in the Kondo temperature, and the transition temperatures T-s(x) are of order of the Kondo temperatures T-K(+)(x) of the high-temperature state. The cell volume is found to vary proportionally to 1-n(f)(T). At low temperatures, well away from the transition, the Wilson ratio of the susceptibility chi(0) and specific heat coefficient gamma falls within 20% of the Value predicted for a Kondo impurity, and 1-n(f)(0) and chi(0) are roughly proportional as predicted from the Anderson model. The temperature dependence n(f)(T) for temperatures away from the phase transition also fits the predictions of the Kondo model. The small volume discontinuity Delta V/V-0 observed at T-s suggests that the phase transition is not due to a Kondo volume collapse. The large Hall coefficients R-H(T) observed for x < x(c) and T > T-s(x) suggest instead that a low carrier density in the high-temperature state plays a key role in the phase transition. C1 UNIV CALIF IRVINE,IRVINE,CA 92697. FLORIDA STATE UNIV,TALLAHASSEE,FL 32306. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. RP Cornelius, AL (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. RI Cornelius, Andrew/A-9837-2008; Booth, Corwin/A-7877-2008 NR 25 TC 97 Z9 97 U1 2 U2 12 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 7993 EP 8000 DI 10.1103/PhysRevB.56.7993 PG 8 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600050 ER PT J AU Hundley, MF Thompson, JD Canfield, PC Fisk, Z AF Hundley, MF Thompson, JD Canfield, PC Fisk, Z TI Electronic transport properties of the semimetallic heavy fermion YbBiPt SO PHYSICAL REVIEW B LA English DT Article ID THERMOELECTRIC-POWER; COMPOUND YBBIPT; MAGNETISM; ALLOYS; STATE AB The electronic transport properties of YbBiPt are examined in the temperature range 4-325 K to gain insight into the electronic structure of this compound. The magnitude of the strongly magnetic-field-dependent Hall effect is consistent with a semimetallic electronic structure. The data place an upper limit on the carrier concentration of 6X10(20) holes/cm(3). The thermoelectric power (TEP) is dominated by a large phonon-drag peak below 100 K, while above 200 K the TEP is dominated by a large linear-in-temperature contribution. The temperature-dependent resistivity manifests very little indication of a magnetic scattering contribution. These characteristics indicate the YbBiPt is a low-carrier concentration semimetal. It appears that this low-carrier conducting state is closely tied to the massively renormalized electronic state evident in this compound below 1 K. RP Hundley, MF (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. RI Canfield, Paul/H-2698-2014 NR 29 TC 14 Z9 14 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 8098 EP 8102 DI 10.1103/PhysRevB.56.8098 PG 5 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600064 ER PT J AU Vigliante, A vonZimmermann, M Schneider, JR Frello, T Andersen, NH Madsen, J Buttrey, DJ Gibbs, D Tranquada, JM AF Vigliante, A vonZimmermann, M Schneider, JR Frello, T Andersen, NH Madsen, J Buttrey, DJ Gibbs, D Tranquada, JM TI Detection of charge scattering associated with stripe order in La1.775Sr0.225NiO4 by hard-x-ray diffraction SO PHYSICAL REVIEW B LA English DT Article ID INCOMMENSURATE MAGNETIC CORRELATIONS; DIFFUSE-SCATTERING; HOLES; SPINS; LA2NIO4.125; LA2-XSRXNIO4 AB In the past few years neutron-scattering experiments have shown very intriguing stripe correlations of spins and holes in hole-doped La2NiO4 and La2CuO4. As yet, no x-ray-diffraction experiment has confirmed the neutron results and the topic is still controversial. In this paper we report the observation of stripe correlations of holes by x-ray diffraction. The experiments were performed in Laue geometry at the hard-x-ray beamline BW5 at HASYLAB on a crystal of La1.775Sr0.225NiO4 which was previously studied by neutron diffraction. Temperature dependences of the intensities and wave vectors of the charge-density-modulation peaks were characterized and found to be in good agreement with the neutron-scattering results. Interestingly, weak, temperature-dependent scattering was also observed at positions consistent with nonresonant x-ray magnetic scattering from the spin correlations; however, a definitive determination of its origin remains lacking. C1 SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. DESY,HAMBURGER SYNCHROTRONSTRAHLUNGSLAB HASYLAB,D-22603 HAMBURG,GERMANY. RISO NATL LAB,DEPT SOLID STATE PHYS,DK-4000 ROSKILDE,DENMARK. UNIV DELAWARE,DEPT CHEM ENGN,NEWARK,DE 19716. RP Vigliante, A (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Tranquada, John/A-9832-2009; Andersen, Niels/A-3872-2012 OI Tranquada, John/0000-0003-4984-8857; NR 23 TC 37 Z9 37 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 8248 EP 8251 DI 10.1103/PhysRevB.56.8248 PG 4 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600081 ER PT J AU Wei, X Johnson, SR Swanson, BI Donohoe, RJ AF Wei, X Johnson, SR Swanson, BI Donohoe, RJ TI ESR study of photoinduced defects in isotopically enriched quasi-one-dimensional chlorine-bridged platinum complexes SO PHYSICAL REVIEW B LA English DT Article ID EN = ETHYLENEDIAMINE; NONLINEAR LATTICE-RELAXATION; TRANSITION-METAL COMPLEXES; CHARGE-TRANSFER EXCITATION; MIXED-VALENCE COMPLEXES; MIDGAP STATES; 2-BAND MODEL; (CLO4)4; ELECTRON; SOLITON AB Photoinduced defects in the quasi-one-dimensional chlorine-bridged platinum complex, [Pt-II(en)(2)][Pt-IV(en)(2)Cl-2](ClO4)(4), where en=ethylenediamine, C2N2H8, were investigated by light-induced electron-spin resonance (LESR). Using samples prepared with enriched nuclear isotopes including Pt-194 (I = 0), H-2(I = 1), and Cl-37 (I = 3/2, magnetogyric ratio similar to 83% that of Cl-35), the hyperfine and superhyperfine (SHF) patterns in the LESR spectra were fully characterized. The SHF structure (16 G average spacing) is unequivocally assigned to the bridging chlorines by comparison of the LESR spectra from samples with natural abundance Cl with samples enriched with Cl-37. The LESR spectra were analyzed at g(perpendicular to),g(\\), and intermediate angles by simulation of both the polaron and soliton-spin distributions. The results at temperatures above 6 K were found to be in better agreement with the neutral soliton assignment advanced by Kuroda and co-workers, The spectra from 6 to 140 K do not indicate motional narrowing as has been previously suggested. Below 6 K, surprisingly, the LESR spectra of both the natural and isotopically enriched samples exhibit an unusual dependence on temperature, modulation frequency, or microwave power, which indicates the presence:of a localized dynamic process. Two other types of defect which exhibit strong sample-to-sample variability were also discovered in the LESR spectra: one is likely a spin triplet, and the other appears only at temperatures above approximately 120 K and is quite intense and stable at room temperature. C1 LOS ALAMOS NATL LAB,CST4,MS J586,LOS ALAMOS,NM 87545. NR 32 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 8257 EP 8264 DI 10.1103/PhysRevB.56.8257 PG 8 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600083 ER PT J AU Radaelli, PG Iannone, G Marezio, M Hwang, HY Cheong, SW Jorgensen, JD Argyriou, DN AF Radaelli, PG Iannone, G Marezio, M Hwang, HY Cheong, SW Jorgensen, JD Argyriou, DN TI Structural effects on the magnetic and transport properties of perovskite A(1-x)A(x)'MnO3 (x=0.25, 0.30) SO PHYSICAL REVIEW B LA English DT Article ID NEUTRON-DIFFRACTION; DOUBLE-EXCHANGE; COLOSSAL-MAGNETORESISTANCE; FERROMAGNETIC TRANSITION; GIANT MAGNETORESISTANCE; PRESSURE; LA1-XCAXMNO3; LA1-XSRXMNO3; MANGANITES; TEMPERATURE AB The evolution of the structural properties of A(1-x)A'xMnO3 was determined as a function of temperature, average A-site radius (r(A)), and applied pressure for the ''optimal'' doping range x = 0.25, 0.30, by using high-resolution neutron powder diffraction. The metal-insulator transition,which can be induced both as a function of temperature and of (r(A)) was found to be accompanied by significant structural changes. Both the paramagnetic charge-localized phase, which exists at high temperatures for all values of (r(A)), and the spincanted ferromagnetic charge-ordered phase, which is found at low temperatures for low values of (r(A)), are characterized by large metric distortions of the MnO6 octahedra. These structural distortions are mainly incoherent with respect to the space-group symmetry, with a significant coherent component only at low (r(A)). These distortions decrease abruptly at the transition into the ferromagnetic metal phase. These observations are consistent with the hypothesis that, in the insulating phases, lattice distortions of the Jahn-Teller type, in addition to spin scattering, provide a charge-localization mechanism. The evolution of the average structural parameters indicates that the variation of the electronic bandwidth is the driving force for the evolution of the insulator-to-metal transition al T-C as a function of ''chemical'' and applied pressure. C1 CNR,MASPEC,I-43100 PARMA,ITALY. AT&T BELL LABS,LUCENT TECHNOL,MURRAY HILL,NJ 07974. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP Radaelli, PG (reprint author), INST MAX VON LAUE PAUL LANGEVIN,BOITE POSTALE 156,F-38042 GRENOBLE 09,FRANCE. RI Radaelli, Paolo/C-2952-2011; Hwang, Harold/I-6943-2012 OI Radaelli, Paolo/0000-0002-6717-035X; NR 37 TC 610 Z9 615 U1 5 U2 60 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 8265 EP 8276 DI 10.1103/PhysRevB.56.8265 PG 12 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600084 ER PT J AU Pe, T Benkraouda, M Clem, JR AF Pe, T Benkraouda, M Clem, JR TI Model calculations for the current-voltage characteristics of moving two-dimensional pancake vortex lattices in a finite stack of magnetically coupled superconducting thin films with transport current in the top layer SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; 2-DIMENSIONAL VORTICES; MIXED-STATE; FLUX-FLOW; BI2SR2CACU2OX; TRANSFORMER; CREEP; FIELD; FORCE AB We consider two-dimensional (2D) pancake vortices in a stack of N Josephson-decoupled superconducting films in an applied magnetic induction perpendicular to the layers and transport current applied to the top layer. We assume that the pancake vortices in every layer form lattices that have the same structure and are not rotated relative to each other, though we do not require them to be in perfect registry with one another. Current-voltage characteristics are calculated, corresponding to voltage-measuring circuits attached to the top and bottom layers. The effects of both zero and nonzero uniform pinning are investigated. For small currents, the pancake lattices either remain pinned or move with the same fixed velocity. But when the surface current density in the top layer exceeds a certain value, the calculated top and bottom voltages become different from each other. We then investigate the dependence of this decoupling surface current density on the applied magnetic induction, the pinning strength, and the number of layers. C1 IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011. RP Pe, T (reprint author), IOWA STATE UNIV,AMES LAB,US DEPT ENERGY,AMES,IA 50011, USA. NR 30 TC 5 Z9 5 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 8289 EP 8297 DI 10.1103/PhysRevB.56.8289 PG 9 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600087 ER PT J AU Mahan, GD AF Mahan, GD TI Reentrant superconductivity from the anharmonic electron-phonon interaction SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; AXIAL OXYGEN; STRUCTURAL INSTABILITY; YBA2CU3O7; TC; TRANSITION AB The Eliashberg equations are solved for the transition temperature of a superconductor for the case that the phonons are harmonic but the electron-phonon interaction is anharmonic. The anharmonic interaction increases the transition temperature for the same coupling strength. Reentrant behavior is predicted for large anharmonicity. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP Mahan, GD (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. NR 25 TC 6 Z9 6 U1 3 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 8322 EP 8329 DI 10.1103/PhysRevB.56.8322 PG 8 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600091 ER PT J AU Vaknin, D Miller, LL Zarestky, JL AF Vaknin, D Miller, LL Zarestky, JL TI Stacking of the square-lattice antiferromagnetic planes in Ca2CuO2Cl2 SO PHYSICAL REVIEW B LA English DT Article ID LAMELLAR COPPER OXIDES; SPIN-1/2 HEISENBERG-ANTIFERROMAGNET; NEUTRON-SCATTERING; LOW-TEMPERATURES; EXCHANGE INTERACTIONS; MAGNETIC-STRUCTURE; SINGLE-CRYSTAL; MONTE-CARLO; SR2CUO2CL2; LA2CUO4 AB Single-crystal neutron elastic and quasielastic scattering and magnetization studies of the spin-1/2 square-lattice Heisenberg antiferromagnet Ca2CuO2Cl2 indicate an unusual stacking of the antiferromagnetic planes in the Neel state (T-N = 247 +/- 5 K) which is different from the collinear stacking in isostructural Sr2CuO2Cl2. A generalized magnetic model is presented to describe the data. Elastic scattering along the (1/2 1/2 l) rod is observed above T-N, suggesting that the CuO2 planes, although uncoupled, maintain some degree of two-dimensional Order up to a crossover temperature (T-co approximate to 280 K) to the isotropic Heisenberg state. No structural phase transition from the 14/mmm symmetry was observed in the temperature range 10-300 K. C1 IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011. RP Vaknin, D (reprint author), IOWA STATE UNIV,AMES LAB,AMES,IA 50011, USA. RI Vaknin, David/B-3302-2009 OI Vaknin, David/0000-0002-0899-9248 NR 56 TC 9 Z9 9 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 13 BP 8351 EP 8359 DI 10.1103/PhysRevB.56.8351 PG 9 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600096 ER PT J AU Krotov, YA Lee, DH Balatsky, AV AF Krotov, YA Lee, DH Balatsky, AV TI Superconductivity of a metallic stripe embedded in an antiferromagnet SO PHYSICAL REVIEW B LA English DT Article ID 2-DIMENSIONAL HUBBARD-MODEL; MONTE-CARLO METHOD; T-J MODEL; NEUTRON-SCATTERING; HARTREE-FOCK; PHASE-SEPARATION; HOLES; SPINS; LATTICE; LA2NIO4.125 AB We study a simple model for the metallic stripes found in La1.6 - xNd0.4SrxCuO4 a two chain Hubbard ladder embedded in a static antiferromagnetic environment. We consider two cases; a ''topological stripe,'' for which the phase of the Neel order parameter shifts by pi across the ladder, and a ''nontopological stripe,'' for which there is no phase shift across the ladder. We perform one-loop renormalization-group calculations to determine the low-energy properties. We compare the results with those of the isolated ladder and show that for small doping superconductivity is enhanced in the topological stripe, and suppressed in the nontopological one. In the topological stripe, the superconducting order parameter is a mixture of a spin-singlet component with zero momentum and a spin-triplet component with momentum pi. We argue that this mixture is generic, and is due to the presence of an additional term in the quantum Ginzburg-Landau action. Some consequences of this mixing are discussed. C1 LOS ALAMOS NATL LAB, DIV THEORY, LOS ALAMOS, NM 87545 USA. RP UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. NR 42 TC 21 Z9 21 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 OCT 1 PY 1997 VL 56 IS 13 BP 8367 EP 8373 DI 10.1103/PhysRevB.56.8367 PG 7 WC Physics, Condensed Matter SC Physics GA YD866 UT WOS:A1997YD86600098 ER PT J AU Pagliuso, PG Rettori, C Oseroff, SB Sarrao, J Fisk, Z Cornelius, A Hundley, MF AF Pagliuso, PG Rettori, C Oseroff, SB Sarrao, J Fisk, Z Cornelius, A Hundley, MF TI ESR of Gd3+ in the Kondo-lattice compound YbAgCu4 and its reference compounds RAgCu4 (R = Y,Lu) SO PHYSICAL REVIEW B LA English DT Article ID ELECTRON-SPIN-RESONANCE; VALENCE TRANSITION; YBIN1-XAGXCU4; BEHAVIOR; METALS; UBE13; HEAT AB Low-temperature (T<30 K) electron-spin-resonance (ESR) experiments of Gd3+ diluted in the Kondo-lattice compound YbAgCu4, and its reference compounds YAgCu4 and LuAgCu4, are interpreted in terms of an enhanced density of states at the Fermi level for the Yb-based compound. The results of susceptibility and ESR (Korringa rate and g-shift) measurements show negligible electron-electron exchange enhancement for all the studied compounds. The exchange interaction between the Gd3+ local moment and the conduction electrons(c-e) is c-e wave vector dependent in all three compounds. C1 SAN DIEGO STATE UNIV,SAN DIEGO,CA 92182. FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP Pagliuso, PG (reprint author), UNICAMP,INST FIS GLEB WATAGHIN,BR-13083970 CAMPINAS,SP,BRAZIL. RI Cornelius, Andrew/A-9837-2008; Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Rettori, Carlos/0000-0001-6692-7915; NR 37 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 14 BP 8933 EP 8937 DI 10.1103/PhysRevB.56.8933 PG 5 WC Physics, Condensed Matter SC Physics GA YC731 UT WOS:A1997YC73100063 ER PT J AU Schulthess, TC Butler, WH Zhang, XG Nicholson, DMC MacLaren, JM AF Schulthess, TC Butler, WH Zhang, XG Nicholson, DMC MacLaren, JM TI Calculation of conductivity in the presence of structural defects: Application to spin dependence of conductivity in cobalt SO PHYSICAL REVIEW B LA English DT Article ID STACKING-FAULT ENERGIES; GIANT MAGNETORESISTANCE; TRANSITION-METALS; ELEMENTAL METALS; SURFACE; VALVES; ALLOY AB We present a technique which allows the efficient calculation of the electrical conductivity of large systems which retain periodicity in only two dimensions. We use this technique to calculate the nonlocal electrical conductivity of cobalt with stacking faults. These calculations use a realistic first-principles electronic structure and evaluate the conductivity using the Kubo-Greenwood formula with a phenomenological electron lifetime. We find that the change in the electronic structure induced by the stacking faults leads to an enhancement of the spin dependence of the nonlocal electrical conductivity. A similar enhancement of the spin dependence of the conductivity is found when the crystal structure of Co is changed to hexagonal closed packed. The effect can be traced back to the shape of the Fermi surface which is almost independent of the crystal structure in the majority channel but is strongly structure dependent in the minority channel. C1 TULANE UNIV,DEPT PHYS,NEW ORLEANS,LA 70118. RP Schulthess, TC (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 23 TC 7 Z9 7 U1 2 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 14 BP 8970 EP 8977 DI 10.1103/PhysRevB.56.8970 PG 8 WC Physics, Condensed Matter SC Physics GA YC731 UT WOS:A1997YC73100067 ER PT J AU Ovchinnikov, YN Ivlev, BI Soulen, RJ Claassen, JH Fogle, WE Colwell, JH AF Ovchinnikov, YN Ivlev, BI Soulen, RJ Claassen, JH Fogle, WE Colwell, JH TI Temperature and magnetic field dependence of the induced magnetization in macroscopic samples due to the proximity effect SO PHYSICAL REVIEW B LA English DT Article ID CLAD NB; SILVER AB We have applied the Ginzburg-Landau equations to calculate the behavior of the diamagnetism of macroscopic samples consisting of a normal metal in contact with a superconductor. In particular, the calculation focuses on the temperature region above the superconductive transition temperature T-cN Of the normal metal. We have compared these calculations with experimental measurements of the temperature (0.006-1 K) and magnetic field (10(-9)-10(-6) T) dependence of the diamgetism for several samples of Be (T(cN)similar to 23 mK) and W (T(cN)similar to 15.5 mK) in contact with the superconductor Al (T-cS= 1.18 K). The agreement between the predictions and measurements is quite good and confirms the approach of using the Ginzburg-Landau model to calculate the proximity effect in macroscopic normal systems above their superconductive transitions. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. NIST, GAITHERSBURG, MD 20899 USA. RP Ovchinnikov, YN (reprint author), RUSSIAN ACAD SCI, LD LANDAU THEORET PHYS INST, KOSYGIN 2, MOSCOW 11733V, RUSSIA. NR 31 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 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 14 BP 9038 EP 9051 DI 10.1103/PhysRevB.56.9038 PG 14 WC Physics, Condensed Matter SC Physics GA YC731 UT WOS:A1997YC73100075 ER PT J AU Cohn, JL Neumeier, JJ Popoviciu, CP McClellan, KJ Leventouri, T AF Cohn, JL Neumeier, JJ Popoviciu, CP McClellan, KJ Leventouri, T TI Local lattice distortions and thermal transport in perovskite manganites SO PHYSICAL REVIEW B LA English DT Article ID CHARGE-ORDERED STATE; MAGNETIC-FIELD; LA1-XCAXMNO3; LA1-XSRXMNO3; CONDUCTIVITY; TRANSITION; LA0.67CA0.33MNO3; FILMS AB Measurements of thermal conductivity versus temperature and magnetic field are reported for perovskite manganites that exhibit ferromagnetic (FM), charge-ordering (CO), antiferromagnetic, and/or structural phase transitions. The data reveal a dominant lattice contribution to the heat conductivity with kappa similar to 1-2 W/mK near room temperature. The rather low values, implying a phonon mean free path on the order of a lattice spacing, are shown to correlate with static local distortions of the MnO6 octahedra. Modifications of the local structure are responsible for abrupt anomalies in the zero-field kappa at the FM, CO, and structural transitions, and for colossal magnetothermal resistance near the FM transition. C1 FLORIDA ATLANTIC UNIV,DEPT PHYS,BOCA RATON,FL 33431. UNIV MIAMI,DEPT PHYS,CORAL GABLES,FL 33124. LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP Cohn, JL (reprint author), UNIV MIAMI,DEPT PHYS,CORAL GABLES,FL 33124, USA. NR 43 TC 96 Z9 96 U1 2 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 14 BP R8495 EP R8498 PG 4 WC Physics, Condensed Matter SC Physics GA YC731 UT WOS:A1997YC73100011 ER PT J AU Jean, YC Zhang, RW Cao, H Yuan, JP Huang, CM Nielsen, B AsokaKumar, P AF Jean, YC Zhang, RW Cao, H Yuan, JP Huang, CM Nielsen, B AsokaKumar, P TI Glass transition of polystyrene near the surface studied by slow-positron-annihilation spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID THIN-FILMS; POLYMER SURFACES; TEMPERATURE; SIMULATION; BEAMS AB We have measured the Doppler broadening energy spectra of positron annihilation using a variable monoenergetic positron beam as a function of positron energy and of temperature in polystyrene. The S parameters from the energy spectra versus temperature show that onset temperatures significantly decrease as the positron energy decreases. This result gives direct evidence that the glass-transition temperature is suppressed at a magnitude of 57 degrees C at the depth of 50 Angstrom from the surface. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP Jean, YC (reprint author), UNIV MISSOURI,DEPT CHEM,KANSAS CITY,MO 64110, USA. RI Nielsen, Bent/B-7353-2009 OI Nielsen, Bent/0000-0001-7016-0040 NR 23 TC 152 Z9 152 U1 0 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 14 BP R8459 EP R8462 PG 4 WC Physics, Condensed Matter SC Physics GA YC731 UT WOS:A1997YC73100002 ER PT J AU Louca, D Egami, T Brosha, EL Roder, H Bishop, AR AF Louca, D Egami, T Brosha, EL Roder, H Bishop, AR TI Local Jahn-Teller distortion in La1-xSrxMnO3 observed by pulsed neutron diffraction SO PHYSICAL REVIEW B LA English DT Article ID COLOSSAL-MAGNETORESISTANCE MANGANITES; DOUBLE-EXCHANGE FERROMAGNET; DOPED LAMNO3; LATTICE; PHOTOEMISSION; RESISTIVITY; TRANSITION AB The atomic pair-density function of La1-xSrxMnO3 (0 less than or equal to x less than or equal to 0.4) obtained by pulsed neutron diffraction indicates that their local atomic structure significantly deviates from the average structure, and that the local Jahn-Teller (JT) distortion persists even when the crystallographic structure shows no JT distortion. In the paramagnetic insulating phase doped holes form one-site small polarons, represented by the local absence of JT distortion. The polarons become more extended at low temperatures, but local distortions are found even in the metallic phase. The role of polarons in the phase transitions in transport and magnetic properties are discussed. C1 UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP Louca, D (reprint author), UNIV PENN,DEPT MAT SCI & ENGN,3231 WALNUT ST,PHILADELPHIA,PA 19104, USA. NR 34 TC 267 Z9 267 U1 0 U2 13 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 14 BP R8475 EP R8478 PG 4 WC Physics, Condensed Matter SC Physics GA YC731 UT WOS:A1997YC73100006 ER PT J AU Scheidl, S Vinokur, VM AF Scheidl, S Vinokur, VM TI Gliding dislocations in a driven vortex lattice SO PHYSICAL REVIEW B LA English DT Article ID CHARGE-DENSITY WAVES; GLASS PHASE; FLUX CREEP; DYNAMICS; SYSTEMS; SUPERCONDUCTORS; DISORDER; FILMS AB The dynamics of dislocations in a two-dimensional vortex lattice is studied in the presence of a pinning potential and a transport current. We present a nonequilibrium mechanism that generates an average glide velocity V-d of the dislocation with respect to the moving vortex lattice. It is found to decay like V-d similar to upsilon(-4) for large lattice velocity upsilon. From this result a crossover between a regime where the dislocations are pinned by the impurities and a regime when dislocations move coherently with the vortex lattice is established. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP Scheidl, S (reprint author), UNIV COLOGNE,INST THEORET PHYS,ZULPICHER STR 77,D-50937 COLOGNE,GERMANY. NR 30 TC 14 Z9 14 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD OCT 1 PY 1997 VL 56 IS 14 BP R8522 EP R8525 PG 4 WC Physics, Condensed Matter SC Physics GA YC731 UT WOS:A1997YC73100018 ER PT J AU Pudliner, BS Pandharipande, VR Carlson, J Pieper, SC Wiringa, RB AF Pudliner, BS Pandharipande, VR Carlson, J Pieper, SC Wiringa, RB TI Quantum Monte Carlo calculations of nuclei with A<=7 SO PHYSICAL REVIEW C LA English DT Article ID FEW-BODY NUCLEI; LIGHT-NUCLEI; GROUND-STATE; 3-NUCLEON INTERACTION; SCATTERING DATA; PATH-INTEGRALS; FORM-FACTORS; COULOMB SUM; 3-BODY; SYSTEMS AB We report quantum Monte Carlo calculations of ground and low-lying excited states for nuclei with A less than or equal to 7 using a realistic Hamiltonian containing the Argonne upsilon(18) two-nucleon and Urbana IX three-nucleon potentials. A detailed description of the Green's-function Monte Carlo algorithm for systems with state-dependent potentials is given and a number of tests of its convergence and accuracy are performed. We find that the Hamiltonian being used results in ground states of both Li-6 and Li-7 that are stable against breakup into subclusters, but somewhat underbound compared to experiment. We also have results for He-6, He-7, and their isobaric analogs. The known excitation spectra of all these nuclei are reproduced reasonably well and we predict a number of excited states in He-6 and He-7. We also present spin-polarized one-body and several different two-body density distributions. These are the first microscopic calculations that directly produce nuclear shell structure from realistic interactions that fit NAI scattering data. C1 UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. RI Wiringa, Robert/M-4970-2015 NR 53 TC 791 Z9 795 U1 0 U2 10 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 OCT PY 1997 VL 56 IS 4 BP 1720 EP 1750 DI 10.1103/PhysRevC.56.1720 PG 31 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900008 ER PT J AU Aberg, S Semmes, PB Nazarewicz, W AF Aberg, S Semmes, PB Nazarewicz, W TI Spherical proton emitters SO PHYSICAL REVIEW C LA English DT Article ID DEFORMED-NUCLEI; ALPHA-DECAY; STATE; RADIOACTIVITY; DEFORMATIONS; EMISSION; ENERGIES; REGION AB Various theoretical approaches to proton emission from spherical nuclei are investigated, and it is found that all the methods employed give very similar results. The calculated decay widths are found to be qualitatively insensitive to the parameters of the proton-nucleus potential, i.e., changing the potential parameters over a fairly large range typically changes the decay width by no more than a factor of similar to 3. Proton half-lives of observed heavy proton emitters are, in general, well reproduced by spherical calculations with the spectroscopic factors calculated in the independent quasiparticle approximation. The quantitative agreement with experimental data obtained in our study requires that the parameters of the proton-nucleus potential be chosen carefully. It also suggests that deformed proton emitters will provide invaluable spectroscopic information on the angular momentum decomposition of single-proton orbitals in deformed nuclei. C1 OAK RIDGE NATL LAB,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831. TENNESSEE TECHNOL UNIV,DEPT PHYS,COOKEVILLE,TN 38505. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. UNIV WARSAW,INST THEORET PHYS,PL-00681 WARSAW,POLAND. RP Aberg, S (reprint author), LUND INST TECHNOL,DEPT MATH PHYS,POB 118,S-22100 LUND,SWEDEN. NR 47 TC 186 Z9 190 U1 1 U2 6 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 OCT PY 1997 VL 56 IS 4 BP 1762 EP 1773 DI 10.1103/PhysRevC.56.1762 PG 12 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900011 ER PT J AU Zhang, B Pang, Y AF Zhang, B Pang, Y TI Frame dependence of parton cascade results SO PHYSICAL REVIEW C LA English DT Article ID ULTRARELATIVISTIC NUCLEAR COLLISIONS; HEAVY-ION COLLISIONS; THERMALIZATION; CAUSALITY; DYNAMICS; PLASMA AB Frame dependence of parton cascade results is studied for different schemes of performing cascade simulations. We show that different schemes do not always agree and results may have strong frame dependence. When the interaction range is on the order of mean free path acid the collisions are done in the two parton center-of-mass frame, the results are not sensitive to the global frame in which the collisions are ordered. Effects of different differential cross sections are also discussed. C1 UNIV WASHINGTON,INST NUCL THEORY,SEATTLE,WA 98195. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP Zhang, B (reprint author), COLUMBIA UNIV,DEPT PHYS,538 W 120TH ST,NEW YORK,NY 10027, USA. NR 11 TC 13 Z9 13 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 OCT PY 1997 VL 56 IS 4 BP 2185 EP 2190 DI 10.1103/PhysRevC.56.2185 PG 6 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900049 ER PT J AU Kopecky, S Harvey, JA Hill, NW Krenn, M Pernicka, M Riehs, P Steiner, S AF Kopecky, S Harvey, JA Hill, NW Krenn, M Pernicka, M Riehs, P Steiner, S TI Neutron charge radius determined from the energy dependence of the neutron transmission of liquid Pb-208 and Bi-209 SO PHYSICAL REVIEW C LA English DT Article ID TOTAL CROSS-SECTIONS; ELECTRIC POLARIZABILITY; SCATTERING LENGTHS; E)-AMPLITUDE; CORRECTNESS; BISMUTH; DUBNA; LEAD; (N; BI AB The ORELA experiment on the neutron charge radius has been reevaluated. The neutron transmission of liquid thorogenic Pb-208 With the neutron time-of-flight method in the neutron energy range from 0.08 to 800 eV was measured. Additional studies on condensed matter effects for liquid Bi and liquid Pb have provided more accurate corrections resulting in smaller systematic uncertainties for the neutron-electron scattering length b(ne). We have also reevaluated the transmission data on liquid Bi of Melkonian and co-workers. We have obtained values of b(ne)= (-1.33+/-0.027+/-0.03) X 10(-3) fm for Pb-208 and b(ne)= (-1.44+/-0.033+/-0.06) X 10(-3) fm for Bi-209 where for both results the two uncertainties denote the statistical and the systematic uncertainty, respectively. The results for Pb-208 and Bi-209 were found to be in good agreement. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. INST HOCHENERGIEPHYS,A-1060 VIENNA,AUSTRIA. UNIV ZURICH,INST PHYS,CH-8057 ZURICH,SWITZERLAND. RP Kopecky, S (reprint author), UNIV VIENNA,INST KERNPHYS,A-1020 VIENNA,AUSTRIA. NR 37 TC 76 Z9 76 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 OCT PY 1997 VL 56 IS 4 BP 2229 EP 2237 DI 10.1103/PhysRevC.56.2229 PG 9 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900054 ER PT J AU Vetter, K Macchiavelli, AO Asztalos, SJ Clark, RM Deleplanque, MA Diamond, RM Fallon, P Krucken, R Lee, IY MacLeod, RW Schmid, GJ Stephens, FS AF Vetter, K Macchiavelli, AO Asztalos, SJ Clark, RM Deleplanque, MA Diamond, RM Fallon, P Krucken, R Lee, IY MacLeod, RW Schmid, GJ Stephens, FS TI Population and detection of two-phonon octupole vibrational states in Pb-208 SO PHYSICAL REVIEW C LA English DT Article ID 2-PHONON; GD-148 AB We report on an experiment to search for the decay of two-phonon octupole vibrational states in Pb-208 With GAMMASPHERE. A beam of Sm-154 at a bombarding energy of 1 GeV was used to excite Pb-208 via quasielastic as well as via deep-inelastic processes. To be independent of the lifetime of the two-phonon state a thin target was used, requiring the measurement of the position of the scattered particles to correct for the Doppler shift of the emitted gamma rays. Scattered particles were detected by a silicon-strip detector covering forward angles. We did not observe any discrete gamma transition in the expected energy range of 2-3 MeV down to a limit of 20% and 4% of the intensity in the 5(-)-->3(-) transition for quasielastic and deep-inelastic processes, respectively. RP Vetter, K (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Kruecken, Reiner/A-1640-2013 OI Kruecken, Reiner/0000-0002-2755-8042 NR 18 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD OCT PY 1997 VL 56 IS 4 BP 2316 EP 2319 DI 10.1103/PhysRevC.56.2316 PG 4 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900060 ER PT J AU Teixeira, RRP Goldman, ID daCruz, MTF Browne, E Lee, IY Macchiavelli, AO Norman, EB AF Teixeira, RRP Goldman, ID daCruz, MTF Browne, E Lee, IY Macchiavelli, AO Norman, EB TI Weak gamma rays from the electron-capture decay of Au-194 SO PHYSICAL REVIEW C LA English DT Article AB We present gamma-ray energies and intensities of 34 new weak transitions in the electron-capture decay of Au-194. These gamma rays were detected in singles experiments with high-purity Ge and anti-Compton detectors, and in gamma-gamma coincidence experiments, with the HERA array of Ge detectors. Their placements in the decay scheme confirm levels in Pt-194 at 1373.9 and 1737.3 keV observed in the electron-capture decay of Au-194. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP Teixeira, RRP (reprint author), UNIV SAO PAULO,INST FIS,CP 20516,BR-01498 SAO PAULO,BRAZIL. NR 11 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD OCT PY 1997 VL 56 IS 4 BP 2320 EP 2323 DI 10.1103/PhysRevC.56.2320 PG 4 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900061 ER PT J AU Lerma, F LaFosse, DR Devlin, M Sarantites, DG Asztalos, S Clark, RM Fallon, P Lee, IY Macchiavelli, AO MacLeod, RW Baktash, C Brinkman, MJ Rudolph, D AF Lerma, F LaFosse, DR Devlin, M Sarantites, DG Asztalos, S Clark, RM Fallon, P Lee, IY Macchiavelli, AO MacLeod, RW Baktash, C Brinkman, MJ Rudolph, D TI Search for linking transitions in Eu-143 SO PHYSICAL REVIEW C LA English DT Article ID SUPERDEFORMED BAND; DECAY; SPIN; COINCIDENCE; DY-152; PB-194; STATES; LINE AB An experiment was performed with the Gammasphere Ge-detector array, and the Microball charged particle detector, to search for transitions involved in the decay from the yrast superdeformed band in Eu-143. Sum spectra in coincidence with single, double, and triple gates on SD transitions were produced to search for previously reported two-step links between the superdeformed and the near-yrast ND levels. The sum spectra contained no evidence of peaks corresponding to sums of two-step linking transitions. Several discrete gamma rays were observed in coincidence with the yrast SD band. One previously reported single-step transition at 3361 keV was confirmed to decay out of the SD band. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. RP Lerma, F (reprint author), WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130, USA. RI Rudolph, Dirk/D-4259-2009; Devlin, Matthew/B-5089-2013 OI Rudolph, Dirk/0000-0003-1199-3055; Devlin, Matthew/0000-0002-6948-2154 NR 24 TC 9 Z9 9 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 OCT PY 1997 VL 56 IS 4 BP R1671 EP R1674 PG 4 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900002 ER PT J AU Schuck, C Gueorguieva, E LopezMartens, A Hannachi, F Korichi, A Vieu, C Dionisio, JS Deloncle, I Kaci, M Stephens, FS Deleplanque, MA Kelly, WH Kharraja, B Gall, BJP vanSeveren, UJ Pohler, W Schulze, B Hubel, H Wadsworth, R AF Schuck, C Gueorguieva, E LopezMartens, A Hannachi, F Korichi, A Vieu, C Dionisio, JS Deloncle, I Kaci, M Stephens, FS Deleplanque, MA Kelly, WH Kharraja, B Gall, BJP vanSeveren, UJ Pohler, W Schulze, B Hubel, H Wadsworth, R TI Proton superdeformed bands below the Z=80 gap in Au-191: Possible evidence for pseudospin coupling SO PHYSICAL REVIEW C LA English DT Article ID SHAPE ISOMERISM; NUCLEI; SPIN; ALIGNMENT; SYMMETRY; STATES AB Three superdeformed bands have been observed in Au-191 using the EUROGAM II multidetector array. The previously known yrast superdeformed band has been extended up to very high rotational frequencies and two new excited bands have been assigned to this nucleus. These bands behave as signature partners and display characteristics which suggest they could be based either on the pi [532]3/2 orbital alone or on that orbital plus the pi [530]1/2 orbital, which become the [<(431)over tilde>]3/2,1/2 doublet in the pseudospin formalism. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. INST RECH SUBATOM,F-67037 STRASBOURG,FRANCE. UNIV BONN,INST STRAHLEN & KERNPHYS,D-53115 BONN,GERMANY. UNIV YORK,DEPT PHYS,YORK YO1 5DD,N YORKSHIRE,ENGLAND. RP Schuck, C (reprint author), INST NATL PHYS NUCL & PHYS PARTICULES,CNRS,CTR SPECTROMETRIE NUCL & SPECTROMETRIE MASS,F-91405 ORSAY,FRANCE. NR 19 TC 16 Z9 16 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 OCT PY 1997 VL 56 IS 4 BP R1667 EP R1670 PG 4 WC Physics, Nuclear SC Physics GA YC729 UT WOS:A1997YC72900001 ER PT J AU Bai, JZ Bardon, O Bian, JG Blum, I Breakstone, A Burnett, T Chai, ZW Chen, GP Chen, HF Chen, J Chen, JC Chen, SM CHen, Y Chen, YB Chen, YQ Cheng, BS Cowan, RF Cui, XZ Ding, HL Du, ZZ Dunwoodie, W Fan, XL Fang, J Fero, M Gao, CS Gao, ML Gao, SQ Gratton, P Gu, JH Gu, SD Gu, WX Gu, YF Guo, YN Han, SW Han, Y Harris, FA He, J He, JT He, M Hitlin, DG Hu, GY Hu, JL Hu, QH Hu, T Hu, XQ Huang, XP Huang, YZ Izen, JM Jia, QP Jiang, CH Jin, S Jin, Y Jones, L Kang, SH Ke, ZJ Kelsey, MH Kim, BK Kong, D Lai, YF Lan, HB Lang, PF Lankford, A Li, J Li, PQ Li, Q Li, RB Li, W Li, WD Li, WG Li, XH Li, XN Lin, SZ Lu, F Liu, HM Liu, J Liu, JH Liu, Q Liu, RG Liu, Y Liu, ZA Lou, XC Lowery, B Lu, JG Lu, JY Luo, SQ Luo, Y Ma, AM Ma, EC Ma, JM Mao, HS Mao, ZP Malchow, R Mandelkern, M Meng, XC Ni, HL Nie, J Olsen, SL Oyang, J Paluselli, D Pan, LJ Panetta, J Porter, F Prabhakar, E Qi, ND Qiu, JF Qu, YH Que, YK Rong, G Schernau, M Schmid, B Schultz, J Shao, YY Shen, BW Shen, DL Shen, H Shen, XY Sheng, HY Shi, HZ Shi, XR Soderstrom, E Song, XF Standifird, J Stoker, D Sun, F Sun, HS Sun, SJ Synodinos, J Tan, YP Tang, SQ Toki, W Tong, GL Wang, F Wang, JF Wang, LS Wang, LZ Wang, M Wang, M Wang, P Wang, PL Wang, SMM Wang, TJ Wang, YY Weaver, M Wei, CL Wisniewski, WJ Wu, YG Xi, DM Xia, XM Xie, PP Xiong, WJ Xu, DZ Xu, GF Xu, RS Xu, ZQ Xue, ST Yan, J Yan, WG Yang, CM Yang, CY Yang, H Yang, J Yang, W Yang, XF Ye, MH Ye, SW Ye, SZ Yi, K Young, K Yu, CS Yu, CX Yu, ZQ Yu, ZT Yuan, CZ Zhang, BY Zhang, CC Zhang, DH Zhang, DH Zhang, HL Zhang, J Zhang, JW Zhang, LS Zhang, L Zhang, QJ Zhang, SQ Zhang, XY Zhang, Y Zhang, YY Zhao, DX Zhao, HW Zhao, JW Zhao, M Zhao, WR Zheng, JP Zheng, LS Zheng, ZP Zhou, GP Zhou, HS Zhou, L Zhou, YH Zhu, QM Zhu, YC Zhu, YS Zhuang, BA AF Bai, JZ Bardon, O Bian, JG Blum, I Breakstone, A Burnett, T Chai, ZW Chen, GP Chen, HF Chen, J Chen, JC Chen, SM CHen, Y Chen, YB Chen, YQ Cheng, BS Cowan, RF Cui, XZ Ding, HL Du, ZZ Dunwoodie, W Fan, XL Fang, J Fero, M Gao, CS Gao, ML Gao, SQ Gratton, P Gu, JH Gu, SD Gu, WX Gu, YF Guo, YN Han, SW Han, Y Harris, FA He, J He, JT He, M Hitlin, DG Hu, GY Hu, JL Hu, QH Hu, T Hu, XQ Huang, XP Huang, YZ Izen, JM Jia, QP Jiang, CH Jin, S Jin, Y Jones, L Kang, SH Ke, ZJ Kelsey, MH Kim, BK Kong, D Lai, YF Lan, HB Lang, PF Lankford, A Li, J Li, PQ Li, Q Li, RB Li, W Li, WD Li, WG Li, XH Li, XN Lin, SZ Lu, F Liu, HM Liu, J Liu, JH Liu, Q Liu, RG Liu, Y Liu, ZA Lou, XC Lowery, B Lu, JG Lu, JY Luo, SQ Luo, Y Ma, AM Ma, EC Ma, JM Mao, HS Mao, ZP Malchow, R Mandelkern, M Meng, XC Ni, HL Nie, J Olsen, SL Oyang, J Paluselli, D Pan, LJ Panetta, J Porter, F Prabhakar, E Qi, ND Qiu, JF Qu, YH Que, YK Rong, G Schernau, M Schmid, B Schultz, J Shao, YY Shen, BW Shen, DL Shen, H Shen, XY Sheng, HY Shi, HZ Shi, XR Soderstrom, E Song, XF Standifird, J Stoker, D Sun, F Sun, HS Sun, SJ Synodinos, J Tan, YP Tang, SQ Toki, W Tong, GL Wang, F Wang, JF Wang, LS Wang, LZ Wang, M Wang, M Wang, P Wang, PL Wang, SMM Wang, TJ Wang, YY Weaver, M Wei, CL Wisniewski, WJ Wu, YG Xi, DM Xia, XM Xie, PP Xiong, WJ Xu, DZ Xu, GF Xu, RS Xu, ZQ Xue, ST Yan, J Yan, WG Yang, CM Yang, CY Yang, H Yang, J Yang, W Yang, XF Ye, MH Ye, SW Ye, SZ Yi, K Young, K Yu, CS Yu, CX Yu, ZQ Yu, ZT Yuan, CZ Zhang, BY Zhang, CC Zhang, DH Zhang, DH Zhang, HL Zhang, J Zhang, JW Zhang, LS Zhang, L Zhang, QJ Zhang, SQ Zhang, XY Zhang, Y Zhang, YY Zhao, DX Zhao, HW Zhao, JW Zhao, M Zhao, WR Zheng, JP Zheng, LS Zheng, ZP Zhou, GP Zhou, HS Zhou, L Zhou, YH Zhu, QM Zhu, YC Zhu, YS Zhuang, BA TI Measurement of the branching fraction of D-s inclusive semileptonic decay D-s(+)->e(+)X SO PHYSICAL REVIEW D LA English DT Article ID MESON AB The absolute inclusive semileptonic branching fraction of the D-s meson has been measured based on 22.3 pb(-1) of e(+)e(-) collision data collected with the Beijing Spectrometer at root s = 4.03 GeV. At this energy, the D-s are produced in pairs: e(+)e(-) --> Ds+Ds-. We reconstructed 171 +/- 21 +/- 15 D-s events in five hadronic decay modes. In the recoil system of these events, several D-s inclusive semileptonic decays were observed and the branching fraction is estimated to be B(D-s(+) --> e(+) X) = (7.7(-4.3-2.1)(+5-7+2.4))%. C1 MIT,CAMBRIDGE,MA 02139. UNIV TEXAS,DEPT PHYS,RICHARDSON,TX 75083. UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. UNIV SCI & TECHNOL CHINA,DEPT MODERN PHYS,HEFEI 230026,PEOPLES R CHINA. COLORADO STATE UNIV,DEPT PHYS,FT COLLINS,CO 80523. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. SHANDONG UNIV,DEPT PHYS,JINAN 250100,PEOPLES R CHINA. CALTECH,PASADENA,CA 91125. UNIV CALIF IRVINE,DEPT PHYS,IRVINE,CA 92717. TSING HUA UNIV,BEIJING 100084,PEOPLES R CHINA. BEIJING UNIV,DEPT TECH PHYS,BEIJING 100871,PEOPLES R CHINA. RP Bai, JZ (reprint author), ACAD SINICA,INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA. RI Chen, Yu/E-3788-2012 NR 9 TC 7 Z9 9 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD OCT 1 PY 1997 VL 56 IS 7 BP 3779 EP 3782 DI 10.1103/PhysRevD.56.3779 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300001 ER PT J AU Gibbons, L Johnson, SD Kwon, Y Roberts, S Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Schaffner, SF Ugolini, D Wang, R Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Shelkov, V Staeck, J Stroynowski, R Volobouev, I Ye, J Artuso, M Efimov, A Frasconi, F Gao, M Goldberg, M He, D Kopp, S Horwitz, N Moneti, GC Mountain, R Mukhin, Y Schuh, S Skwarnicki, T Stone, S Thulasidas, M Viehhauser, G Xing, X Bartelt, J Csorna, SE Jain, V Marka, S Freyberger, A Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Barish, B Chadha, M Chan, S Eigen, G Miller, JS OGrady, C Schmidtler, M Urheim, J Weinstein, AJ Wurthwein, F Asner, DM Bliss, DW Brower, WS Masek, G Paar, HP Sharma, V Gronberg, J Kutschke, R Lange, DJ Menary, S Morrison, RJ Nelson, HN Nelson, TK Qiao, C Richman, JD Roberts, D Ryd, A Witherell, MS Balest, R Behrens, BH Cho, K Ford, WT Park, H Rankin, P Roy, J Smith, JG Alexander, JP Bebek, C Berger, BE Berkelman, K Bloom, K Cassel, DG Cho, HA Coffman, DM Crowcroft, DS Dickson, M Drell, PS Ecklund, KM Ehrlich, R Elia, R Foland, AD Gaidarev, P Gittelman, B Gray, SW Hartill, DL Heltsley, BK Kandaswamy, J Katayama, N Kim, PC Kreinick, DL Lee, T Liu, Y Ludwig, GS Masui, J Mevissen, J Mistry, NB Ng, CR Nordberg, E Ogg, M Patterson, JR Peterson, D Riley, D Soffer, A Ward, C Athanas, M Avery, P Jones, CD Lohner, M Prescott, C Yang, S Yelton, J Zheng, J Brandenburg, G Briere, RA Gao, YS Kim, DYJ Wilson, R Yamamoto, H Browder, TE Li, F Li, Y Rodriguez, JL Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Selen, M Thaler, JJ Edwards, KW Bellerive, A Janicek, R MacFarlane, DB McLean, KW Patel, PM Sadoff, AJ Ammar, R Baringer, P Bean, A Besson, D Coppage, D Darling, C Davis, R Hancock, N Kotov, S Kravchenko, I Kwak, N Anderson, S Kubota, Y Lattery, M ONeill, JJ Patton, S Poling, R Riehle, T Savinov, V Smith, A Alam, MS Athar, SB Ling, Z Mahmood, AH Severini, H Timm, S Wappler, F Anastassov, A Blinov, S Duboscq, JE Fisher, KD Fujino, D Fulton, R Gan, KK Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, MB Sung, M Undrus, A Wanke, R Wolf, A Zoeller, MM Nemati, B Richichi, SJ Ross, WR Skubic, P Wood, M Bishai, M Fast, J Gerndt, E Hinson, JW Menon, N Miller, DH Shibata, EI Shipsey, IPJ Yurko, M AF Gibbons, L Johnson, SD Kwon, Y Roberts, S Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Schaffner, SF Ugolini, D Wang, R Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Shelkov, V Staeck, J Stroynowski, R Volobouev, I Ye, J Artuso, M Efimov, A Frasconi, F Gao, M Goldberg, M He, D Kopp, S Horwitz, N Moneti, GC Mountain, R Mukhin, Y Schuh, S Skwarnicki, T Stone, S Thulasidas, M Viehhauser, G Xing, X Bartelt, J Csorna, SE Jain, V Marka, S Freyberger, A Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Barish, B Chadha, M Chan, S Eigen, G Miller, JS OGrady, C Schmidtler, M Urheim, J Weinstein, AJ Wurthwein, F Asner, DM Bliss, DW Brower, WS Masek, G Paar, HP Sharma, V Gronberg, J Kutschke, R Lange, DJ Menary, S Morrison, RJ Nelson, HN Nelson, TK Qiao, C Richman, JD Roberts, D Ryd, A Witherell, MS Balest, R Behrens, BH Cho, K Ford, WT Park, H Rankin, P Roy, J Smith, JG Alexander, JP Bebek, C Berger, BE Berkelman, K Bloom, K Cassel, DG Cho, HA Coffman, DM Crowcroft, DS Dickson, M Drell, PS Ecklund, KM Ehrlich, R Elia, R Foland, AD Gaidarev, P Gittelman, B Gray, SW Hartill, DL Heltsley, BK Kandaswamy, J Katayama, N Kim, PC Kreinick, DL Lee, T Liu, Y Ludwig, GS Masui, J Mevissen, J Mistry, NB Ng, CR Nordberg, E Ogg, M Patterson, JR Peterson, D Riley, D Soffer, A Ward, C Athanas, M Avery, P Jones, CD Lohner, M Prescott, C Yang, S Yelton, J Zheng, J Brandenburg, G Briere, RA Gao, YS Kim, DYJ Wilson, R Yamamoto, H Browder, TE Li, F Li, Y Rodriguez, JL Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Selen, M Thaler, JJ Edwards, KW Bellerive, A Janicek, R MacFarlane, DB McLean, KW Patel, PM Sadoff, AJ Ammar, R Baringer, P Bean, A Besson, D Coppage, D Darling, C Davis, R Hancock, N Kotov, S Kravchenko, I Kwak, N Anderson, S Kubota, Y Lattery, M ONeill, JJ Patton, S Poling, R Riehle, T Savinov, V Smith, A Alam, MS Athar, SB Ling, Z Mahmood, AH Severini, H Timm, S Wappler, F Anastassov, A Blinov, S Duboscq, JE Fisher, KD Fujino, D Fulton, R Gan, KK Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, MB Sung, M Undrus, A Wanke, R Wolf, A Zoeller, MM Nemati, B Richichi, SJ Ross, WR Skubic, P Wood, M Bishai, M Fast, J Gerndt, E Hinson, JW Menon, N Miller, DH Shibata, EI Shipsey, IPJ Yurko, M TI Inclusive decays B->DX and B->D*X SO PHYSICAL REVIEW D LA English DT Article ID LUND MONTE-CARLO; WEAK DECAYS; B-DECAYS; NONPERTURBATIVE CORRECTIONS; SEMILEPTONIC DECAYS; BRANCHING FRACTIONS; DISCARDING 1/N(C); JET FRAGMENTATION; E+E ANNIHILATION; QCD AB We report new measurements of the differential and total branching ratios for inclusive B decay to D-0, D+, and D*+ and the first measurement of the same quantities for inclusive B decay to D-*0. Here B is the mixture of B-d and B-u from Y(4S) decay. Furthermore, since more than one charm particle (or antiparticle) of the same kind can be produced in B decay, here ''inclusive B branching ratio'' is used to mean the average number of charm particles and their antiparticles of a certain species: produced in B decay. We obtain the following results (the first error is statistical, the second systematic of this analysis, the third propagated from other measurements): B(B --> (DX)-X-0) = (0.636 +/- 0.014 +/- 0.019 +/- 0.018), B(B --> D+X) = (0.0235 +/- 0.009 +/- 0.009 +/- 0.024), B(B --> (DX)-X-*0) = (0.247 +/- 0.012 +/- 0.018 +/- 0.018). B(B --> D*+X)= (0.239 +/- 0.011 +/- 0.014 +/- 0.009). The following ratio of branching ratios is not affected by most of:the systematic B(B --> (DX)-X-*0)/B(B --> D*+X) = (1.03 +/- 0.07 +/- 0.09 +/- 0.08). We also report the first measurement momentum-dependent D-*0 polarization and a new measurement of the D*+ polarization in inclusive B decay. Using these measurements and other CLEO results and making some additional assumptions, we calculate the average number of c and (c) over bar quarks produced in B decay to be [n(c)] = 1.10 +/- 0.05. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. SO METHODIST UNIV,DALLAS,TX 75275. SYRACUSE UNIV,SYRACUSE,NY 13244. VANDERBILT UNIV,NASHVILLE,TN 37235. VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061. WAYNE STATE UNIV,DETROIT,MI 48202. CALTECH,PASADENA,CA 91125. UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106. UNIV COLORADO,BOULDER,CO 80309. CORNELL UNIV,ITHACA,NY 14853. UNIV FLORIDA,GAINESVILLE,FL 32611. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV HAWAII MANOA,HONOLULU,HI 96822. UNIV ILLINOIS,CHAMPAIGN,IL 61801. CARLETON UNIV,OTTAWA,ON K1S 5B6,CANADA. INST PARTICLE PHYS,OTTAWA,ON K1S 5B6,CANADA. MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA. MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA. ITHACA COLL,ITHACA,NY 14850. UNIV KANSAS,LAWRENCE,KS 66045. UNIV MINNESOTA,MINNEAPOLIS,MN 55455. SUNY ALBANY,ALBANY,NY 12222. OHIO STATE UNIV,COLUMBUS,OH 43210. UNIV OKLAHOMA,NORMAN,OK 73019. PURDUE UNIV,W LAFAYETTE,IN 47907. FAC SCI,CPPM,MARSEILLE,FRANCE. UNIV TEXAS,AUSTIN,TX 78712. BINP,RU-630090 NOVOSIBIRSK,RUSSIA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP Gibbons, L (reprint author), UNIV ROCHESTER,601 ELMWOOD AVE,ROCHESTER,NY 14627, USA. RI Schaffner, Stephen/D-1189-2011; Briere, Roy/N-7819-2014; Frasconi, Franco/K-1068-2016; THULASIDAS, Manoj/A-9920-2017; OI Briere, Roy/0000-0001-5229-1039; Frasconi, Franco/0000-0003-4204-6587; Bean, Alice/0000-0001-5967-8674 NR 53 TC 31 Z9 31 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD OCT 1 PY 1997 VL 56 IS 7 BP 3783 EP 3802 DI 10.1103/PhysRevD.56.3783 PG 20 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300002 ER PT J AU Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI Lancaster, M LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R ThurmanKeup, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyoda, H Trischuk, W deTroconiz, JF Truitt, A Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S AF Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI Lancaster, M LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R ThurmanKeup, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyoda, H Trischuk, W deTroconiz, JF Truitt, A Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S TI Double parton scattering in (p)over-bar-p collisions at root s=1.8 TeV SO PHYSICAL REVIEW D LA English DT Article ID = 1.8 TEV; PHOTON CROSS-SECTION; 4-JET EVENTS; P(P)OVER-BAR COLLISIONS; HADRON-COLLISIONS; PBARP COLLISIONS; COLLIDER; PICTURE; QCD AB A strong signal for double parton (DP) scattering is observed in a 16 pb(-1) sample of <(p)over bar p> --> gamma/pi(0) + 3 jets + X data from the CDF experiment at the Fermilab Tevatron. In DP events, two separate hard scatterings take place in a single <(p)over bar p> collision. We isolate a large sample of data (similar to 14 000 events) of which 53% are found to be DP. The process-independent parameter of double parton scattering, sigma(eff), is obtained without reference to theoretical calculations by comparing observed DP events to events with hard scatterings in separate <(p)over bar p> collisions. The result sigma(eff) = (14.5 +/- 1.7(-2.3)(+1.7)) mb represents a significant improvement over previous measurements, and is used to constrain simple models of parton spatial density. The Feynman x dependence of sigma(eff) is investigated and none is apparent. Further, no evidence is found for kinematic correlations between the two scatterings in DP events. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV BOLOGNA,IST NAZL FIS NUCL,I-40127 BOLOGNA,ITALY. BRANDEIS UNIV,WALTHAM,MA 02264. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60638. DUKE UNIV,DURHAM,NC 28708. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV FLORIDA,GAINESVILLE,FL 33611. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV GENEVA,CH-1211 GENEVA 4,SWITZERLAND. HARVARD UNIV,CAMBRIDGE,MA 02138. HIROSHIMA UNIV,HIGASHIHIROSHIMA 724,JAPAN. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV KARLSRUHE,D-76128 KARLSRUHE,GERMANY. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87132. OHIO STATE UNIV,COLUMBUS,OH 43320. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,SEZ PADOVA,I-36132 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15270. PURDUE UNIV,W LAFAYETTE,IN 47907. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11530,TAIWAN. TEXAS A&M UNIV,COLLEGE STN,TX 77843. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 315,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53806. YALE UNIV,NEW HAVEN,CT 06511. RP Abe, F (reprint author), KEK,NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 315,JAPAN. RI Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014; Introzzi, Gianluca/K-2497-2015; Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013 OI Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Warburton, Andreas/0000-0002-2298-7315 NR 25 TC 198 Z9 198 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD OCT 1 PY 1997 VL 56 IS 7 BP 3811 EP 3832 DI 10.1103/PhysRevD.56.3811 PG 22 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300004 ER PT J AU Riotto, A Tornkvist, O AF Riotto, A Tornkvist, O TI CP-violating solitons in the minimal supersymmetric standard model SO PHYSICAL REVIEW D LA English DT Article ID FINITE-TEMPERATURE; ELECTROWEAK BARYOGENESIS; BREAKING; PHYSICS; STRINGS; MSSM AB We study nontopological and CP-violating static wall solutions in the framework of the minimal supersymmetric standard model. We show that such membranes, characterized by a nontrivial winding of the relative U(1) phase of the two Higgs fields in the direction orthogonal to the wall, exist for small values of the mass of the CP-odd Higgs boson when loop corrections to the Higgs potential are included. Although their present-day existence is excluded by experimental bounds, we argue why they may have existed in the early universe with important cosmological consequences. RP Riotto, A (reprint author), FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,POB 500,BATAVIA,IL 60510, USA. NR 26 TC 5 Z9 5 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD OCT 1 PY 1997 VL 56 IS 7 BP 3917 EP 3923 DI 10.1103/PhysRevD.56.3917 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300013 ER PT J AU Dixon, L Signer, A AF Dixon, L Signer, A TI Complete O(alpha(3)(s)) results for e(+)e(-)->(gamma,Z)->four jets SO PHYSICAL REVIEW D LA English DT Article ID TO-LEADING ORDER; E+E-ANNIHILATION; 4-JET EVENTS; CROSS-SECTIONS; LIGHT GLUINOS; ALPHA-S; ANGULAR-CORRELATIONS; Z(0) RESONANCE; 3-GLUON VERTEX; QCD AB We present the next-to-leading-order [O(alpha(s)(3))] perturbative QCD predictions for e(+)e(-) annihilation into four jets. A previous calculation omitted the O(alpha(s)(3)) terms suppressed by one or more powers of 1/N-c(2), where N-c is the number of colors, and the ''light-by-glue scattering'' contributions. We find that all such terms are uniformly small, constituting less than 10% of the correction. For the Durham clustering algorithm, the leading and next-to-leading logarithms in the limit of the small jet resolution parameter y(cut) can be resummed. We match the resummed results to our fixed-order calculation in order to improve the small y(cut) prediction. RP STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. NR 61 TC 77 Z9 77 U1 0 U2 1 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 OCT 1 PY 1997 VL 56 IS 7 BP 4031 EP 4038 DI 10.1103/PhysRevD.56.4031 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300024 ER PT J AU Carone, CD Hall, LJ AF Carone, CD Hall, LJ TI Neutrino physics from a U(2) flavor symmetry SO PHYSICAL REVIEW D LA English DT Article ID OSCILLATIONS; MASS AB We consider the neutrino physics of models with a sequentially broken U(2) flavor symmetry. Such theories yield the observed pattern of quark and lepton masses, while maintaining sufficient degeneracies between superparticles of the first two, generations to solve the supersymmetric flavor problem. Neutrino mass ratios and mixing angles in these models may differ significantly from those of the charged leptons, even though the neutrinos and charged leptons transform identically under the flavor group. A wide class of well-motivated U(2) theories yield order one nu(mu)-nu(tau) mixing, without a fine-tuning of parameters. These models provide a natural solution to the atmospheric neutrino deficit, and also have distinctive signatures at long-baseline neutrino oscillation experiments. C1 UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. RP UNIV CALIF BERKELEY, ERNEST ORLANDO LAWRENCE BERKELEY NATL LAB, THEORET PHYS GRP, BERKELEY, CA 94720 USA. NR 17 TC 21 Z9 21 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 OCT 1 PY 1997 VL 56 IS 7 BP 4198 EP 4206 DI 10.1103/PhysRevD.56.4198 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300040 ER PT J AU Greub, C Rey, SJ AF Greub, C Rey, SJ TI V-ub from the hadron energy spectrum in inclusive semileptonic B decays SO PHYSICAL REVIEW D LA English DT Article ID OPERATOR PRODUCT EXPANSION; QCD SUM-RULES; LEPTON SPECTRUM; HEAVY QUARKS; END-POINT; NONPERTURBATIVE CORRECTIONS; QUANTUM CHROMODYNAMICS; INSTANTON CONTRIBUTION; VERTICAL-BAR; DISTRIBUTIONS AB A measurement of the hadron energy spectrum in inclusive semileptonic B decays is proposed as a viable method for extracting \V-ub\. Compared to the traditional energy spectrum of the charged lepton, the hadron a energy spectrum exhibits kinematical advantages such as a wider energy window and a larger signal branching fraction. The hadron energy distribution is calculated in the approach of the model of Altarelli et al. and of the heavy-quark effective field theory. In both methods, perturbative QCD corrections, the Fermi motion of the b quark in the B meson, and the recoil momentum of the B meson [stemming from the Y(4S) resonance] are taken into account. We find excellent agreement between the spectra calculated in both methods, especially in the relevant kinematical region below the charmed meson threshold. The theoretical error to \V-ub\, which is dominated by the uncertainty of the b-quark mass, is estimated to be at the +/-12% level. Experimental techniques utilized in the recent measurement of exclusive semileptonic b-->u decays point to the feasibility of the present proposal both at CLEO and at future B factories. C1 STANFORD UNIV,DEPT PHYS,STANFORD,CA 94309. SEOUL NATL UNIV,DEPT PHYS,SEOUL 151742,SOUTH KOREA. SEOUL NATL UNIV,CTR THEORET PHYS,SEOUL 151742,SOUTH KOREA. RP Greub, C (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. OI Rey, Soo-Jong/0000-0002-2589-7331 NR 51 TC 16 Z9 16 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD OCT 1 PY 1997 VL 56 IS 7 BP 4250 EP 4259 DI 10.1103/PhysRevD.56.4250 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300046 ER PT J AU Wusthoff, M AF Wusthoff, M TI Large rapidity gap events in deep inelastic scattering SO PHYSICAL REVIEW D LA English DT Article ID PHOTON DIFFRACTIVE DISSOCIATION; HARD DIFFRACTION; SMALL-X; UNITARITY CORRECTIONS; LIPATOV POMERON; DIPOLE PICTURE; QCD; BEHAVIOR; REGION; MODEL AB Large rapidity gap events in deep inelastic scattering are discussed in terms of light cone wave functions for quarks and gluons inside the photon. It is shown that this approach is consistent with earlier, conventional Feynman diagram calculations. An updated parametrization for the cross section is given and a numerical analysis presented. RP Wusthoff, M (reprint author), ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439, USA. NR 48 TC 65 Z9 65 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD OCT 1 PY 1997 VL 56 IS 7 BP 4311 EP 4321 DI 10.1103/PhysRevD.56.4311 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300054 ER PT J AU Randrup, J Thews, RL AF Randrup, J Thews, RL TI Analysis of DCC domain structure SO PHYSICAL REVIEW D LA English DT Article ID DISORIENTED CHIRAL CONDENSATE; HIGH-ENERGY COLLISIONS; WAVELET CORRELATIONS; PHASE-TRANSITION; EVOLUTION; FIELD AB Wavelet-type methods are employed for the analysis of pion field configurations that have been obtained by dynamical simulations in idealized scenarios relevant to the formation of disoriented chiral condensates. It is illustrated how the measurement of the isospin domain structure depends on the ability to zoom in on limited parts of the phase space, due to the interplay between the pion correlation length and the effective source geometry. The need for advanced analysis methods is underscored by the fact that the extracted neutral-fraction distribution would differ significantly from the ideal form, even under perfect experimental conditions, and, moreover, by the circumstance that thermal sources with suitably adjusted temperatures can lead to distributions that may be practically indistinguishable from those arising from DCC-type nonequilibrium evolutions. C1 UNIV ARIZONA,DEPT PHYS,TUCSON,AZ 85721. RP Randrup, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 29 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD OCT 1 PY 1997 VL 56 IS 7 BP 4392 EP 4399 DI 10.1103/PhysRevD.56.4392 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA573 UT WOS:A1997YA57300064 ER PT J AU Krapivsky, PL BenNaim, E AF Krapivsky, PL BenNaim, E TI Domain statistics in coarsening systems SO PHYSICAL REVIEW E LA English DT Article ID DIMENSIONAL POTTS-MODEL; ZERO-TEMPERATURE; ISING-MODEL; ANNIHILATION KINETICS; PERSISTENT SPINS; DIFFUSION; DYNAMICS; EXPONENT; LATTICE AB We study the domain number and size distributions in the one-dimensional Ising and q-state Potts models subject to zero-temperature Glauber dynamics. The survival probability of a domain S(t)similar to t(-psi) and an unreacted domain Q(1)(t)similar to t(-delta) are characterized by two independent nontrivial exponents. For the Ising case, we find psi = 0.126 and delta = 1.27 using numerical simulations. We develop an independent interval approximation that predicts the qualitative behavior of the domain distribution and provides good estimates for the exponents. Exact results for the domain distribution are also obtained in several solvable cases. C1 BOSTON UNIV,DEPT PHYS,BOSTON,MA 02215. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP Krapivsky, PL (reprint author), BOSTON UNIV,CTR POLYMER STUDIES,BOSTON,MA 02215, USA. RI Ben-Naim, Eli/C-7542-2009; Krapivsky, Pavel/A-4612-2014 OI Ben-Naim, Eli/0000-0002-2444-7304; NR 58 TC 53 Z9 53 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD OCT PY 1997 VL 56 IS 4 BP 3788 EP 3798 DI 10.1103/PhysRevE.56.3788 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA YC322 UT WOS:A1997YC32200013 ER PT J AU Wallace, DC AF Wallace, DC TI Statistical mechanics of monatomic liquids SO PHYSICAL REVIEW E LA English DT Article ID ALKALI-METALS; ENTROPY; ELEMENTS AB Two key experimental properties of elemental liquids, together with an analysis of the condensed-system potential-energy surface, lead us logically to the dynamical theory of monatomic liquids. Experimentally, the ion motional specific heat is approximately 3Nk for N ions, implying the normal modes of motion are approximately 3N independent harmonic oscillators. This implies the potential surface contains nearly harmonic valleys. The equilibrium configuration at the bottom of each valley is a ''structure.'' Structures are crystalline or amorphous, and amorphous structures can have a remnant of local crystal symmetry, or can be random. The random structures are by far the most numerous, and hence dominate the statistical mechanics of the liquid state, and their macroscopic properties are uniform over the structure class, for large-hi systems. The Hamiltonian for any structural valley is the static structure potential, a sum of harmonic normal modes, and an anharmonic correction. Again from experiment, the constant-density entropy of melting contains a universal disordering contribution of Nk Delta, suggesting the random structural valleys are of universal number w(N), where lnw=Delta. Our experimental estimate for Delta is 0.80. In quasiharmonic approximation, the liquid theory for entropy agrees with experiment, for all currently analyzable experimental data at elevated temperatures, to within 1-2% of the total entropy. Further testable predictions of the theory are mentioned. RP Wallace, DC (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 45 TC 64 Z9 65 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD OCT PY 1997 VL 56 IS 4 BP 4179 EP 4186 DI 10.1103/PhysRevE.56.4179 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA YC322 UT WOS:A1997YC32200060 ER PT J AU Karacali, H Risser, SM Ferris, KF AF Karacali, H Risser, SM Ferris, KF TI Scattering of light from small nematic spheres with radial dielectric anisotropy SO PHYSICAL REVIEW E LA English DT Article ID DISPERSED LIQUID-CRYSTALS; ORIENTATIONAL ORDER; PHASE-TRANSITION; DROPLETS; MICRODROPLETS AB We have calculated the scattering cross sections of small anisotropic nematic droplets embedded in a polymer matrix as a function of the dielectric constants of the nematic and the polymer. We have derived the general form for the Helmholtz wave equation for a droplet which has spatially varying radial anisotropy, and have explicitly solved this equation for three distinct models of the dielectric anisotropy, including one model where the anisotropy increases linearly with droplet radius. Numerical calculations of the scattering amplitudes for droplets much smaller than the wavelength of the incident radiation show that droplets with continual variation in the dielectric anisotropy have much larger scattering amplitude than droplets with fixed anisotropy. The scattering from droplets with linearly varying anisotropy exhibits a scattering minimum for much smaller polymer dielectric constants than the other models. These results show that the scattering from small anisotropic droplets is sensitive to details of the internal structure and anisotropy of the droplet. C1 PACIFIC NW LAB, DEPT MAT SCI, RICHLAND, WA 99352 USA. RP Karacali, H (reprint author), TEXAS A&M UNIV, DEPT PHYS, COMMERCE, TX 75429 USA. NR 26 TC 20 Z9 20 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD OCT PY 1997 VL 56 IS 4 BP 4286 EP 4293 DI 10.1103/PhysRevE.56.4286 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA YC322 UT WOS:A1997YC32200071 ER PT J AU Cheng, WH Sessler, AM Wurtele, JS AF Cheng, WH Sessler, AM Wurtele, JS TI Varying chromaticity: A damping mechanism for the transverse head-tail instability SO PHYSICAL REVIEW E LA English DT Article AB A detailed analytical and numerical study of the suppression of the transverse head-tail instability by modulating the chromaticity over a synchrotron period is presented. We find that a threshold can be developed, and it can be increased to a value larger than the strong head-tail instability threshold. The stability criterion derived agrees very well with the simulations. The underlying physical mechanisms of the damping scheme are rotation of the head-tail phase such that the instability does not occur, and Landau damping due to the incoherent betatron tune spread generated by the varying chromaticity. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP Cheng, WH (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI wurtele, Jonathan/J-6278-2016 OI wurtele, Jonathan/0000-0001-8401-0297 NR 29 TC 2 Z9 2 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD OCT PY 1997 VL 56 IS 4 BP 4695 EP 4709 DI 10.1103/PhysRevE.56.4695 PG 15 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA YC322 UT WOS:A1997YC32200118 ER PT J AU Silver, RN Roder, H AF Silver, RN Roder, H TI Calculation of densities of states and spectral functions by Chebyshev recursion and maximum entropy SO PHYSICAL REVIEW E LA English DT Article ID BINDING MOLECULAR-DYNAMICS; TIGHT-BINDING; POLYNOMIAL EXPANSION; MATRICES; MOMENTS AB We present an efficient algorithm for calculating spectral properties of large sparse Hamiltonian matrices such as densities of states and spectral functions. The combination of Chebyshev recursion and maximum entropy achieves high-energy resolution without significant roundoff error, machine precision, or numerical instability limitations. If controlled statistical or systematic errors an acceptable, CPU and memory requirements scale linearly in the number of states. The inference of spectral properties from moments is much better conditioned for Chebyshev moments than for power moments. We adapt concepts from the kernel polynomial method, a linear Chebyshev approximation with optimized Gibbs damping, to control the accuracy of Fourier integrals of positive nonanalytic functions. We compare thr performance of kernel polynomial and maximum entropy algorithms for an electronic structure example. RP Silver, RN (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,MS B262,LOS ALAMOS,NM 87545, USA. NR 26 TC 65 Z9 65 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD OCT PY 1997 VL 56 IS 4 BP 4822 EP 4829 DI 10.1103/PhysRevE.56.4822 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA YC322 UT WOS:A1997YC32200132 ER PT J AU Paczuski, M Boettcher, S AF Paczuski, M Boettcher, S TI Avalanches and waves in the Abelian sandpile model SO PHYSICAL REVIEW E LA English DT Article ID SELF-ORGANIZED CRITICALITY AB We numerically study avalanches in the two-dimensional Abelian sandpile model in terms of a sequence of waves of toppling events. Priezzhev et al. [Phys. Rev. Lett. 76, 2093 (1996)] have recently proposed exact results for the critical exponents in this model based on the existence of a proposed scaling relation for the difference in sizes of subsequent waves, Delta s = s(k)-s(k+1), where the size of the previous wave sk was considered to be almost always an upper bound for the size of the next wave s(k+1) Here we show that the significant contribution to ils comes from waves that violate the bound; the average [Delta s(s(k))] is actually negative and diverges with the system size, contradicting the proposed solution. C1 LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, MSB258, LOS ALAMOS, NM 87545 USA. RP Paczuski, M (reprint author), UNIV HOUSTON, DEPT PHYS, HOUSTON, TX 77204 USA. RI Boettcher, Stefan/G-2640-2010 OI Boettcher, Stefan/0000-0003-1273-6771 NR 17 TC 24 Z9 24 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD OCT PY 1997 VL 56 IS 4 BP R3745 EP R3748 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA YC322 UT WOS:A1997YC32200002 ER PT J AU King, WA Clare, AG LaCourse, WC Volin, K Wright, AC Wanless, AJ AF King, WA Clare, AG LaCourse, WC Volin, K Wright, AC Wanless, AJ TI A neutron scattering study of As2Se3 glass fibres SO PHYSICS AND CHEMISTRY OF GLASSES LA English DT Article ID STRUCTURE SENSITIVE MEASUREMENTS; AS-SE GLASSES; CHALCOGENIDE GLASSES; AMORPHOUS FILMS; DIFFRACTION; FIBERS AB The results of an investigation into the structure of As2Se3 glass fibres and bulk glass using time-of-flight (TOF) neutron scattering experiments are reported. Structural data are presented in the form of reciprocal space interference functions and real space correlation functions. The data suggest that the bulk glass structure is indeed isotropic and that As2Se3 is chemically ordered. The structure obtained for glass fibres is nearly identical to that of the bulk glass when averaged over all directions with the exception of some longer range correlations. Examination of the structure as a function of scattering vector orientation, which is possible using the TOF technique, shows differences between the fibre and bulk structure. These differences are discussed in terms of the influence of fibre drawing on the As2Se3 glass structure as it is currently understood. Strong evidence for structural anisotropy in rapidly formed fibres is presented and discussed in terms of the real space correlation functions obtained. A correlation feature, unseen in previous diffraction studies of As-Se glasses, has been observed and its possible origin is discussed. C1 ALFRED UNIV,NEW YORK STATE COLL CERAM,ALFRED,NY 14802. ARGONNE NATL LAB,INTENSE PULSED NEUTRON SOURCE,CHICAGO,IL. UNIV READING,READING,BERKS,ENGLAND. NR 37 TC 11 Z9 11 U1 1 U2 1 PU SOC GLASS TECHNOLOGY PI SHEFFIELD PA THORNTON 20 HALLAM GATE ROAD, SHEFFIELD, S YORKSHIRE, ENGLAND S10 5BT SN 0031-9090 J9 PHYS CHEM GLASSES JI Phys. Chem. Glasses PD OCT PY 1997 VL 38 IS 5 BP 269 EP 276 PG 8 WC Chemistry, Physical; Materials Science, Ceramics SC Chemistry; Materials Science GA YC628 UT WOS:A1997YC62800011 ER PT J AU Hurricane, OA Fong, BH Cowley, SC AF Hurricane, OA Fong, BH Cowley, SC TI Nonlinear magnetohydrodynamic detonation .1. SO PHYSICS OF PLASMAS LA English DT Article ID CURRENT SHEET DISRUPTION; BALLOONING INSTABILITY; INTERCHANGE INSTABILITY; MAGNETIC LAYER; MAGNETOTAIL; PLASMA; BREAKUP; MODES; STABILITY AB The sudden release of magnetic free energy, as occurs in spectacular solar flare events, tokamak disruptions, and enigmatic magnetospheric substorms, has long defied any acceptable theoretical explanation. Usual attempts at explaining these explosive events invoke magnetic reconnection and/or ideal magnetohydrodynamic (MHD) instability. However, neither of these two mechanisms can explain the fast time scales without nonlinear destabilization. Recently, Cowley et al. [Phys. Plasmas 3, 1848 (1996)] have demonstrated a new mechanism for nonlinear explosive MHD destabilization of a line tied Rayleigh-Taylor model. In this paper, this picture is generalized to arbitrary magnetic field geometries. As an intermediate step, the ballooning equation in a general equilibrium is derived including the effects of magnetic field curvature, shear, and gravity. This equation determines the linear stability of the plasma configuration and the behavior of the plasma displacement along the magnetic field line. The nonlinear equation which determines the time and spatial dependence, transverse to the equilibrium magnetic field, of the plasma displacement is obtained in fifth order of the expansion. The equations show that explosive behavior is a-natural and generic property of ballooning instabilities close to the linear stability boundary. (C) 1997 American Institute of Physics. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP Hurricane, OA (reprint author), UNIV CALIF LOS ANGELES,DEPT PHYS,405 HILGARD AVE,LOS ANGELES,CA 90095, USA. NR 39 TC 48 Z9 48 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD OCT PY 1997 VL 4 IS 10 BP 3565 EP 3580 DI 10.1063/1.872252 PG 16 WC Physics, Fluids & Plasmas SC Physics GA YA576 UT WOS:A1997YA57600013 ER PT J AU Chen, Y White, RB AF Chen, Y White, RB TI Collisional delta f method SO PHYSICS OF PLASMAS LA English DT Article ID GYROKINETIC SIMULATION; NONLINEAR EVOLUTION; PARTICLE; PLASMAS; MAGNETOHYDRODYNAMICS; MODEL AB A general method for including various collisional effects, such as the drag and diffusion of test particles due to background plasmas, the effect of particle source and sink, and the like-particle Coloumb collisions, is presented. The;marker density g is generally unknown along the particle trajectory, and its evaluation depends on the way particles are initially loaded and new particles are injected into the simulation. The method is demonstrated for the problem of the nonlinear evolution of the toroidicity induced Alfven eigenmode, driven by energetic a particles. The saturation amplitude is found to scale with the collision rate in a way as predicted by theory. (C) 1997 American Institute of Physics. RP PRINCETON PLASMA PHYS LAB, POB 451, PRINCETON, NJ 08543 USA. RI White, Roscoe/D-1773-2013 OI White, Roscoe/0000-0002-4239-2685 NR 15 TC 29 Z9 29 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD OCT PY 1997 VL 4 IS 10 BP 3591 EP 3598 DI 10.1063/1.872254 PG 8 WC Physics, Fluids & Plasmas SC Physics GA YA576 UT WOS:A1997YA57600015 ER PT J AU Batha, SH Levinton, FM Ramsey, AT Schmidt, GL Zarnstorff, MC AF Batha, SH Levinton, FM Ramsey, AT Schmidt, GL Zarnstorff, MC TI Local test of parallel electrical resistivity in the Tokamak Fusion Test Reactor SO PHYSICS OF PLASMAS LA English DT Article ID PBX-M; TRANSPORT; PLASMAS; PROFILE; TFTR AB Local, time-resolved measurements have been made of the response of the internal magnetic-field distribution to large changes in the total plasma current. Measurements were made by the motional Stark effect (MSE) polarimeter on the Tokamak Fusion Test Reactor (TFTR). [R. J. Hawryluk et al., Proceedings of the 11th International Conference on Plasma Physics and Controlled Nuclear Fusion (International Atomic Energy Agency, Vienna, 1987) Vol. I, p. 51.] A direct test of the classical and neoclassical resistivity models was made by comparing the predicted field evolution using either model to that measured. It was found that the neoclassical resistivity model was a better predictor of the local magnetic-field temporal evolution than was the classical model. (C) 1997 American Institute of Physics. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. RP Batha, SH (reprint author), FUS PHYS & TECHNOL INC,3555 VOYAGER ST,TORRANCE,CA 90503, USA. NR 29 TC 10 Z9 10 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD OCT PY 1997 VL 4 IS 10 BP 3614 EP 3619 DI 10.1063/1.872256 PG 6 WC Physics, Fluids & Plasmas SC Physics GA YA576 UT WOS:A1997YA57600017 ER PT J AU Mikkelsen, DR White, RB Akers, RJ Kaye, SM McCune, DC Menard, JE AF Mikkelsen, DR White, RB Akers, RJ Kaye, SM McCune, DC Menard, JE TI Energetic particle orbits in the National Spherical Tokamak Experiment SO PHYSICS OF PLASMAS LA English DT Article ID PLASMAS; INJECTION; TOPOLOGY; TFTR AB The trajectories of neutral beam injected energetic ions in spherical tokamaks are examined. The large poloidal magnetic field in the outboard region of spherical tokamaks causes neutral beam injected ions to be born on trapped orbits even with cotangential injection. Numerical solutions to the equations for particle motion and for guiding center drifts are compared in several magnetic equilibria for a range of particle initial conditions. Even when r(L)/a similar to 1/4 the guiding center orbits closely resemble the path of the instantaneous center of gyration of the particle motion; exceptions occur primarily for orbits near the trapped/passing boundary. Finite Larmor radius effects are included in guiding center simulations of prompt orbit loss in the National Spherical Tokamak Experiment (NSTX) [J. Spitzer et al., Fusion Technol. 30, 1337 (1996)]. Orbit loss in the NSTX is caused primarily by collisions with the close fitting conducting shell, and severe losses would be expected with counter directed injection. While most orbits are similar to those found in conventional tokamaks, additional orbit types are possible in spherical tokamaks. (C) 1997 American Institute of Physics. RP Mikkelsen, DR (reprint author), PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. RI White, Roscoe/D-1773-2013; OI White, Roscoe/0000-0002-4239-2685; Menard, Jonathan/0000-0003-1292-3286 NR 23 TC 30 Z9 30 U1 2 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD OCT PY 1997 VL 4 IS 10 BP 3667 EP 3675 DI 10.1063/1.872263 PG 9 WC Physics, Fluids & Plasmas SC Physics GA YA576 UT WOS:A1997YA57600024 ER PT J AU Davidson, RC Stoltz, P Chen, CP AF Davidson, RC Stoltz, P Chen, CP TI Intense non-neutral beam propagation in a periodic solenoidal field using a macroscopic fluid model with zero thermal emittance SO PHYSICS OF PLASMAS LA English DT Article AB A macroscopic fluid model is developed to describe the nonlinear dynamics and collective processes in an intense high-current beam propagating in the z-direction through a periodic focusing solenoidal field B-z(z + S) = B-z(z), where S is the axial periodicity length. The analysis assumes that space-charge effects dominate the effects of thermal beam emittance, Kr-b(2) much greater than epsilon(th)(2), and is based on the macroscopic moment-Maxwell equations, truncated by neglecting the pressure tensor and higher-order moments. Here, K = 2N(b)Z(i)(2)e(2)/<(gamma)over cap>(3)(b)m beta(b)(2)c(2) is the self-field perveance, N-b is the number of particles per unit axial length, and r(b) is the characteristic beam radius. Assuming a thin beam with r(b) much less than S, azimuthally symmetric beam equilibria with partial derivative/partial derivative t = 0 = partial derivative/partial derivative theta are investigated, allowing for an axial modulation of the beam density n(b)(r,z) and macroscopic flow velocity V-rb(r,z)(e) over cap(r) + V-theta b(r,z)(e) over cap(theta) + V-zb(r,z)(e) over cap(z) by the periodic focusing field. To illustrate the considerable flexibility of the macroscopic formalism, assuming (nearly) uniform axial flow velocity V-b over the beam cross section, beam equilibrium properties are calculated for two examples: (a) uniform radial density profile over the interval 0 less than or equal to r < r(b)(z), and (b) an infinitesimally thin annular beam centered at r = r(b)(z). The analysis generally allows for the azimuthal flow velocity V-theta b(r,z) to differ from the Larmor frequency, and the model is used to calculate the (leading-order) correction delta V-zb(r,z) to the axial flow velocity for the step-function density profile in case (a) above. (C) 1997 American Institute of Physics. C1 MIT,PLASMA SCI & FUS CTR,CAMBRIDGE,MA 02139. RP Davidson, RC (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. NR 16 TC 10 Z9 10 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD OCT PY 1997 VL 4 IS 10 BP 3710 EP 3717 DI 10.1063/1.872558 PG 8 WC Physics, Fluids & Plasmas SC Physics GA YA576 UT WOS:A1997YA57600030 ER PT J AU Perl, ML AF Perl, ML TI The leptons after 100 years SO PHYSICS TODAY LA English DT Article ID FRACTIONAL ELECTRIC CHARGE; PARTICLES; SEARCH; HYDROGEN RP Perl, ML (reprint author), STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. NR 24 TC 1 Z9 1 U1 1 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 0031-9228 J9 PHYS TODAY JI Phys. Today PD OCT PY 1997 VL 50 IS 10 BP 34 EP 40 DI 10.1063/1.881960 PG 7 WC Physics, Multidisciplinary SC Physics GA XZ329 UT WOS:A1997XZ32900008 ER PT J AU Petschek, AG Bell, GI Bethe, HA AF Petschek, AG Bell, GI Bethe, HA TI Obituary - J. Carson Mark SO PHYSICS TODAY LA English DT Item About an Individual C1 CORNELL UNIV,ITHACA,NY. RP Petschek, AG (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 1 TC 0 Z9 0 U1 1 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD OCT PY 1997 VL 50 IS 10 BP 124 EP & DI 10.1063/1.881942 PG 2 WC Physics, Multidisciplinary SC Physics GA XZ329 UT WOS:A1997XZ32900024 ER PT J AU Barnes, T AF Barnes, T TI Exotic meson surprises theorists SO PHYSICS WORLD LA English DT Article RP Barnes, T (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 0 TC 6 Z9 6 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0953-8585 J9 PHYS WORLD JI Phys. World PD OCT PY 1997 VL 10 IS 10 BP 21 EP 22 PG 2 WC Physics, Multidisciplinary SC Physics GA YC401 UT WOS:A1997YC40100024 ER PT J AU vanHoof, A Green, PJ AF vanHoof, A Green, PJ TI Rare codons are not sufficient to destabilize a reporter gene transcript in tobacco SO PLANT MOLECULAR BIOLOGY LA English DT Article DE codon usage; RNA degradation; RNA stability; translation ID MESSENGER-RNA; SACCHAROMYCES-CEREVISIAE; PROTEIN GENES; EXPRESSION; YEAST; ATTENUATION; SEQUENCES; STABILITY; PLANTS; DECAY AB In plants, as in other eukaryotes, most synonymous codons of the genetic code are not used with equal frequency, but instead some codons are preferred, whereas others are rare. Circumstantial evidence led to the suggestion that rare codons have a negative influence on mRNA stability. To address this question experimentally, rare codons encoded by a Bacillus thuringiensis (B.t.) toxin gene (cryIA(c)) or a synthetic sequence were introduced into a phytohemagglutinin (PHA) reporter gene. In neither case was the mRNA stability appreciably diminished in stably transformed tobacco cell cultures nor was the accumulation of mRNA in transgenic plants affected. Thus rare codons do not appear to be sufficient to cause rapid degradation of the PHA mRNA and potentially other mRNAs in plants. C1 MICHIGAN STATE UNIV,US DOE,PLANT RES LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT BIOCHEM,E LANSING,MI 48824. NR 21 TC 12 Z9 12 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0167-4412 J9 PLANT MOL BIOL JI Plant Mol.Biol. PD OCT PY 1997 VL 35 IS 3 BP 383 EP 387 DI 10.1023/A:1005849622840 PG 5 WC Biochemistry & Molecular Biology; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA YB661 UT WOS:A1997YB66100013 PM 9349262 ER PT J AU Pacella, D Gabellieri, L Mazzitelli, G Fournier, KB Finkenthal, M AF Pacella, D Gabellieri, L Mazzitelli, G Fournier, KB Finkenthal, M TI Direct measurement of the impurity radial flux in the FTU plasma core SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Letter ID AUTOIONIZATION; IONS AB A direct measurement of the impurity radial flux in the FTU plasma core has been obtained by observation of soft x-ray spectra from highly ionized charge states of intrinsic molybdenum. This measurement has been performed using the equation of continuity for Mo31+ and the radial density profiles of Mo32+, Mo31+ and Mo30+. The profiles of these ions have been obtained by inversion of the measured signal along six different lines of sight in a series of reproducible discharges. Other ions. such as Fe and Ni, which emit in the VUV range, are also monitored at different chords and confirm the picture given by the soft x-ray measurements. A collisional-radiative model developed at LLNL and JHU allowed the reconstruction, from the spectra, of the radial profiles for the three molybdenum ions. The resulting flux Gamma(31+) shows that the transport is negligible (within the experimental errors) in the central region r < 10 cm, but is very rapid in the intermediate region 10 < r < 20 cm, and is more than one order of magnitude greater than the neoclassical prediction. Defining an effective 'radial drift velocity' V-r = Gamma(31+)/N31+, it is found that V-r has its maximum at half radius and there its value is about 0.4% of the thermal velocity. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218. RP Pacella, D (reprint author), EURATOM,ENEA,FUS CTR RIC ENERGIA,CP 65,I-00044 FRASCATI,ITALY. NR 15 TC 1 Z9 1 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0741-3335 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD OCT PY 1997 VL 39 IS 10 BP 1501 EP 1508 DI 10.1088/0741-3335/39/10/001 PG 8 WC Physics, Fluids & Plasmas SC Physics GA YF172 UT WOS:A1997YF17200001 ER PT J AU Bonivert, WD Cushnie, G AF Bonivert, WD Cushnie, G TI Special alert - New databases & expanded services! SO PLATING AND SURFACE FINISHING LA English DT Editorial Material C1 CAI ENGN,OAKTON,VA 22124. RP Bonivert, WD (reprint author), SANDIA NATL LABS,M-S 9404,BOX 969,LIVERMORE,CA 94551, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ELECTROPLATERS SOC INC PI ORLANDO PA 12644 RESEARCH PKWY, ORLANDO, FL 32826-3298 SN 0360-3164 J9 PLAT SURF FINISH JI Plat. Surf. Finish. PD OCT PY 1997 VL 84 IS 10 BP 38 EP 39 PG 2 WC Metallurgy & Metallurgical Engineering; Materials Science, Coatings & Films SC Metallurgy & Metallurgical Engineering; Materials Science GA XY799 UT WOS:A1997XY79900012 ER PT J AU Adolf, D Chambers, R AF Adolf, D Chambers, R TI Verification of the capability for quantitative stress prediction during epoxy cure SO POLYMER LA English DT Article DE epoxies; curing; stresses ID SOL-GEL TRANSITION; CROSS-LINKING; VISCOELASTICITY; RELAXATIONS; POLYMERS AB We previously developed a formalism to calculate the evolution of stresses during the cure of crosslinking polymers. In the present study, we characterized the chemical kinetics and cure-dependent thermophysical properties for two epoxy systems, the diglycidyl ether of bisphenol A cured by either diethanolamine or a mixture of aromatic amines. Well-defined experiments were performed in which the cure stresses for these two epoxies were measured as a function of time. The stresses predicted by our formalism, using the material parameters obtained for the two systems, agreed well with the measured stresses. (C) 1997 Elsevier Science Ltd. RP Adolf, D (reprint author), SANDIA NATL LABS,DEPT THEORET & COMPUTAT MAT MODELLING,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 17 TC 62 Z9 62 U1 0 U2 10 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0032-3861 J9 POLYMER JI Polymer PD OCT PY 1997 VL 38 IS 21 BP 5481 EP 5490 DI 10.1016/S0032-3861(97)00077-3 PG 10 WC Polymer Science SC Polymer Science GA XV814 UT WOS:A1997XV81400031 ER PT J AU Velegol, D Gautam, M Shamsi, A AF Velegol, D Gautam, M Shamsi, A TI Catalytic cracking of a coal tar in a fluid bed reactor SO POWDER TECHNOLOGY LA English DT Article DE catalytic cracking; coal tar AB A coal-derived tar from the Coal Technology Corporation's mild gasification process was catalytically cracked in a fluid bed reactor. Several commercial catalysts were tested and their effectiveness in decomposing tar and releasing sulfur was compared. The effects of process variables such as temperature and residence time were also tested. It was found that the Linde LZ-Y82 zeolite was the most effective catalyst tested in converting tar to coke and gases. LZ-Y82 was also the most effective catalyst in converting the sulfur compounds in the tar into hydrogen sulfide which can be removed by a sorbent. Other catalysts such as LZ-Y82/NiW, LZ-Y82/ZnTi, and Englehard's Sp2323 showed strong catalytic activity. LZ-Y3Z7, which is the LZ-Y82 catalyst impregnated with zinc, displayed less activity. LZ-Y82 cracked most effectively in the temperature range 500-530 degrees C. C1 W VIRGINIA UNIV,DEPT MECH & AEROSP ENGN,MORGANTOWN,WV 26506. US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26505. NR 10 TC 14 Z9 16 U1 2 U2 7 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0032-5910 J9 POWDER TECHNOL JI Powder Technol. PD OCT 1 PY 1997 VL 93 IS 2 BP 93 EP 100 DI 10.1016/S0032-5910(97)03209-9 PG 8 WC Engineering, Chemical SC Engineering GA XZ002 UT WOS:A1997XZ00200001 ER PT J AU Simpson, RL Urtiew, PA Ornellas, DL Moody, GL Scribner, KFJ Hoffman, DM AF Simpson, RL Urtiew, PA Ornellas, DL Moody, GL Scribner, KFJ Hoffman, DM TI CL-20 performance exceeds that of HMX and its sensitivity is moderate SO PROPELLANTS EXPLOSIVES PYROTECHNICS LA English DT Article AB The explosive performance of epsilon -CL-20 was found to be approximately 14% greater than HMX as determined by cylinder expansion and tantalum plate acceleration experiments. This makes it the most powerful explosive ever tested at small volume expansions of the detonation products. In general CL-20 is more sensitive than HMX. However, the sensitivity of CL-20 to one-dimensional shock lending was found to be similar to HMX. C1 Univ Calif Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94550 USA. RP Simpson, RL (reprint author), Univ Calif Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94550 USA. NR 15 TC 246 Z9 294 U1 4 U2 34 PU WILEY-V C H VERLAG GMBH PI BERLIN PA PO BOX 10 11 61, D-69451 BERLIN, GERMANY SN 0721-3115 J9 PROPELL EXPLOS PYROT JI Propellants Explos. Pyrotech. PD OCT PY 1997 VL 22 IS 5 BP 249 EP 255 DI 10.1002/prep.19970220502 PG 7 WC Chemistry, Applied; Engineering, Chemical SC Chemistry; Engineering GA V2837 UT WOS:000168729700001 ER PT J AU Deret, S Chomilier, J Huang, DB Preud'homme, JL Stevens, FJ Aucouturier, P AF Deret, S Chomilier, J Huang, DB Preud'homme, JL Stevens, FJ Aucouturier, P TI Molecular modeling of immunoglobulin light chains implicates hydrophobic residues in non-amyloid light chain deposition disease SO PROTEIN ENGINEERING LA English DT Article DE accessibility; deposition disease; immunoglobulin; model building; monoclonal light chains ID X-RAY STRUCTURES; TUMOR NECROSIS FACTOR; PROTEIN STRUCTURES; 3-DIMENSIONAL STRUCTURE; HYPERVARIABLE REGIONS; VARIABLE REGION; FAB FRAGMENT; ANTIBODY; SEQUENCE; SUBGROUP AB Light chain deposition disease is a severe complication of certain immunoproliferative disorders, due to the secretion of a monoclonal light chain which precipitates close to basement membranes of several tissues, A kappa isotype restriction and an unusual frequency of a variable region subgroup (V kappa IV) suggest that precise structural features govern the propensity of pathogenic light chains to precipitate in extracellular spaces, We studied primary structures of light chains from six patients with light chain deposition disease in comparison with light chains from other pathological conditions, Sequence alignment revealed the presence of certain amino acids only in light chain deposition disease, in particular non-polar replacing hydrophilic residues, To determine the role of these residues, structures of the variable domain from four kappa chains belonging to V kappa I and V kappa IV subgroups responsible for deposition disease were modeled using known immunoglobulins as templates, The most evident structural features shared by all pathogenic light chains were hydrophobic residues exposed to the solvent in complementarity determining regions 1 or 3, In contrast to immunoglobulin light chain-related amyloidosis, where deposition of organized material might be due to electrostatic interactions between light chain dimers, hydrophobic interactions could enhance amorphous precipitation in non-amyloid light chain deposition disease. C1 Hop Necker Enfants Malad, INSERM U25, Clin Immunol Lab, F-75015 Paris, France. CNRS URA 1172, Lab Immunol & Immunopathol, F-86021 Poitiers, France. CNRS URA 009, Lab Mineral & Cristallog, F-75252 Paris, France. Argonne Natl Lab, Ctr Mechanist Biol & Biotechnol, Argonne, IL 60439 USA. RP Aucouturier, P (reprint author), Hop Necker Enfants Malad, INSERM U25, Clin Immunol Lab, F-75015 Paris, France. NR 77 TC 37 Z9 42 U1 1 U2 3 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0269-2139 J9 PROTEIN ENG JI Protein Eng. PD OCT PY 1997 VL 10 IS 10 BP 1191 EP 1197 DI 10.1093/protein/10.10.1191 PG 7 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA YV403 UT WOS:000071819500009 PM 9488143 ER PT J AU Bell, CE Yeates, TO Eisenberg, D AF Bell, CE Yeates, TO Eisenberg, D TI Unusual conformation of nicotinamide adenine dinucleotide (NAD) bound to diphtheria toxin: A comparison with NAD bound to the oxidoreductase enzymes SO PROTEIN SCIENCE LA English DT Article DE diphtheria toxin; NAD conformation; nicotinamide adenine dinucleotide (NAD; principal component analysis; Rossmann fold; Structural Classification of Proteins (SCOP) database ID CRYSTAL-STRUCTURE; 3-DIMENSIONAL STRUCTURE; MALATE-DEHYDROGENASE; SUBSTRATE-BINDING; ADP-RIBOSYLATION; RESOLUTION; REDUCTASE; SITE; CATALYSIS; SPECIFICITY AB The conformation of NAD bound to diphtheria toxin (DT), an ADP-ribosylating enzyme, has been compared to the conformations of NAD(P) bound to 23 distinct NAD(P)-binding oxidoreductase enzymes, whose structures are available in the Brookhaven Protein Data Bank. For the oxidoreductase enzymes, NAD(P) functions as a cofactor in electron transfer, whereas for DT NAD is a labile substrate in which the N-glycosidic bond between the nicotinamide ring and the N-ribose is cleaved. All NAD(P) conformations were compared by (1) visual inspection of superimposed molecules, (2) RMSD of atomic positions, (3) principal component analysis, and (4) analysis of torsion angles and other conformational parameters. Whereas the majority of oxidoreductase-bound NAD(P) conformations are found to be similar, the conformation of NAD bound to DT is found to be unusual. Distinctive features of the conformation of NAD bound to DT that may be relevant to DT's function as an ADP-ribosylating enzyme include (1) an unusually short distance between the PN and N1N atoms, reflecting a highly folded conformation for the nicotinamide mononucleotide (NMN) portion of NAD, and (2) a torsion angle chi(N) similar to 0 degrees about the scissile N-glycosidic bond, placing the nicotinamide ring outside of the preferred anti and syn orientations. In NAD bound to DT, the highly folded NMN conformation and torsion angle chi(N) similar to 0 degrees could contribute to catalysis, possibly by orienting the C1'N atom of NAD for nucleophilic attack, or by placing strain on the N-glycosidic bond, which is cleaved by DT. The unusual overall conformation of NAD bound to DT is likely to reflect the structure of DT, which is unusual among NAD(P)-binding enzymes. In DT, the NAD binding site is formed at the junction of two antiparallel beta-sheets. In contrast, although the 24 oxidoreductase enzymes belong to at least six different structural classes, almost all of them bind NAD(P) at the C-terminal end of a parallel beta-sheet. The structural alignments and principal component analysis show that enzymes of the same structural class bind to particularly similar conformations of NAD(P), with few exceptions. The conformation of NAD bound to DT superimposes closely with that of an NAD analogue bound to Pseudomonas exotoxin A, an ADP-ribosylating toxin that is structurally homologous to DT. This suggests that all of the ADP-ribosylating enzymes that are structurally homologous to DT and ETA will bind a highly similar conformation of NAD. C1 UNIV CALIF LOS ANGELES,DOE LAB STRUCT BIOL & MOL MED,INST MOL BIOL,LOS ANGELES,CA 90095. UNIV CALIF LOS ANGELES,DEPT CHEM & BIOCHEM,LOS ANGELES,CA 90095. OI Yeates, Todd/0000-0001-5709-9839 FU NIGMS NIH HHS [GM-31299] NR 42 TC 58 Z9 58 U1 0 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD OCT PY 1997 VL 6 IS 10 BP 2084 EP 2096 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA YB609 UT WOS:A1997YB60900004 PM 9336832 ER PT J AU Gilmanshin, R Dyer, RB Callender, RH AF Gilmanshin, R Dyer, RB Callender, RH TI Structural heterogeneity of the various forms of apomyoglobin: Implications for protein folding SO PROTEIN SCIENCE LA English DT Article DE apomyoglobin; denaturation; protein folding; temperature melting; tryptophan fluorescence ID MOLTEN GLOBULE INTERMEDIATE; PROTON NMR-SPECTROSCOPY; COLD DENATURATION; INITIATION SITES; PEPTIDE MODELS; NATIVE-STATE; MYOGLOBIN; STABILITY; FLUORESCENCE; TRANSITIONS AB Temperature-induced denaturation transitions of different structural forms of apomyoglobin were studied monitoring intrinsic tryptophan fluorescence. It was found that the tryptophans are effectively screened from solvent both in native and acid forms throughout most of the temperature range tested. Thus, the tryptophans' surroundings do not show a considerable change in structure where major protein conformational transitions have been found in apomyoglobin using other techniques. At high temperatures and under strong destabilizing conditions, the tryptophans' fluorescence parameters show sigmoidal thermal denaturation. These results, combined with previous studies, show that the structure of this protein is heterogeneous, including native-like (tightly packed) and molten globule-like substructures that exhibit conformation (denaturation) transitions under different conditions of pH and temperature (and denaturants). The results suggest that the folding of this protein proceeds via two ''nucleation'' events whereby native-like contacts are formed. One of these events, which involves AGH ''core'' formation, appears to occur very early in the folding process, even before significant hydrophobic collapse in the rest of the protein molecule. From the current studies and other results, a rather detailed picture of the folding of myoglobin is presented, on the level of specific structures and their thermodynamical properties as well as formation kinetics. C1 YESHIVA UNIV ALBERT EINSTEIN COLL MED,DEPT BIOCHEM,BRONX,NY 10461. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. CUNY CITY COLL,DEPT PHYS,NEW YORK,NY 10031. FU NIGMS NIH HHS [GM35183, GM53640] NR 44 TC 41 Z9 41 U1 0 U2 5 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD OCT PY 1997 VL 6 IS 10 BP 2134 EP 2142 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA YB609 UT WOS:A1997YB60900008 PM 9336836 ER PT J AU Kim, KK Yokota, H Kim, R Kim, SH AF Kim, KK Yokota, H Kim, R Kim, SH TI Cloning, expression, and crystallization of a hyperthermophilic protein that is homologous to the eukaryotic translation initiation factor, eIF5A SO PROTEIN SCIENCE LA English DT Article DE hyperthermophile; Methanococcus jannaschii; translation initiation factor; X-ray crystallography ID SACCHAROMYCES-CEREVISIAE; FACTOR EIF-5A; HYPUSINE; PROLIFERATION AB A gene coding for a protein homologous to a translation initiation factor of eukaryotes, eIF5A, was cloned from Methanococcus jannaschii, a hyperthermophile with an optimum growth temperature of 85 degrees C. The protein was overexpressed, purified and crystallized. The crystals were obtained by vapor diffusion method with 8% PEG 4000 as precipitant and belong to space group P4(1)22 with unit cell dimensions a = b = 45.52 Angstrom and c = 155.59 Angstrom. These crystals diffract to at least 2.2 Angstrom resolution. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,STRUCT BIOL DIV,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 12 TC 10 Z9 10 U1 0 U2 1 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD OCT PY 1997 VL 6 IS 10 BP 2268 EP 2270 PG 3 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA YB609 UT WOS:A1997YB60900023 PM 9336851 ER PT J AU Hartman, FC AF Hartman, FC TI Finn Wold (1928-1997) - Obituary SO PROTEIN SCIENCE LA English DT Item About an Individual RP Hartman, FC (reprint author), OAK RIDGE NATL LAB,DIV LIFE SCI,OAK RIDGE,TN 37831, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD OCT PY 1997 VL 6 IS 10 BP 2271 EP 2272 PG 2 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA YB609 UT WOS:A1997YB60900024 ER PT J AU Garcia, AE Krumhansl, JA Frauenfelder, H AF Garcia, AE Krumhansl, JA Frauenfelder, H TI Variations on a theme by Debye and Waller: From simple crystals to proteins SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article DE protein dynamics; molecular dynamics; crambin; X-ray ID DOUBLE QUADRATIC CHAIN; HYDROPHOBIC PROTEIN; MOLECULAR-DYNAMICS; MOTIONS; CRYSTALLOGRAPHY; SIMULATIONS; CRAMBIN; WATER AB Debye and Waller showed how to adjust scattering intensities in diffraction experiments for harmonic motions of atoms about an average, static reference configuration, However, many motions, particularly in biological molecules as compared to simple crystals, are far from harmonic. We show how, using a variety of simple anharmonic, multiconformational models, it is possible to construct a variety of Generalized Debye-Waller Factors, and understand their meaning, A central result for these cases is that, in principle, intensity factors cannot be obtained from true total mean square displacements of the atoms, We make the distinction between the intensity factors for unimodal quasiharmonic motions and those for the anharmonic, multimodal (valley hopping) motions. Only the former affect the conventional B factors. (C) 1997 Wiley-Liss, Inc.dagger C1 CORNELL UNIV,DEPT PHYS,ITHACA,NY 14853. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP Garcia, AE (reprint author), LOS ALAMOS NATL LAB,THEORET & BIOPHYS GRP,T-10 MSK710,LOS ALAMOS,NM 87545, USA. NR 38 TC 41 Z9 43 U1 0 U2 9 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-3585 J9 PROTEINS JI Proteins PD OCT PY 1997 VL 29 IS 2 BP 153 EP 160 PG 8 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA XZ547 UT WOS:A1997XZ54700003 PM 9329080 ER PT J AU Kushner, SA Dewey, SL Kornetsky, C AF Kushner, SA Dewey, SL Kornetsky, C TI Gamma vinyl GABA attenuates cocaine-induced lowering of brain stimulation reward thresholds SO PSYCHOPHARMACOLOGY LA English DT Article DE intracranial self stimulation (ICSS); dopamine; rat; GABA transaminase inhibitor; vigabatrin ID VENTRAL TEGMENTAL AREA; NUCLEUS-ACCUMBENS; SELF-STIMULATION; RAT; METABOLISM; PROJECTION; RECEPTORS; AGONISTS; NEURONS; ACID AB Gamma-vinyl GABA (GVG, also referred to as vigabatrin), an irreversible inhibitor of GABA transaminase (GABA-T), raises levels of GABA in nerve terminals, inhibits striatal dopamine release, and attenuates cocaine-induced increases in extracellular dopamine in the striatum and nucleus accumbens. In order to determine the action of GVG on dopamine-mediated reward, we examined its effects on the threshold for rewarding brain stimulation in male F-344 rats. GVG dose-dependently raised brain stimulation reward (BSR) thresholds at doses of 200, 300, and 400 mg/kg without significant effects on motor performance as measured by response latencies. In order to determine if GVG had similar modulatory effects on cocaine-induced lowering of BSR thresholds, the effective doses of GVG were co-administered with 2.5 and 5.0 mg/kg cocaine, doses that significantly lower BSR thresholds. The 400 mg/kg dose of GVG significantly blocked the lowering of thresholds seen at each dose of cocaine. Cocaine in combination with 200 or 300 mg/kg GVG, doses of GVG that significantly raise BSR thresholds, resulted in thresholds not significantly different from those obtained with cocaine alone. These data demonstrate that, at the doses tested, GVG is more effective at modulating basal reward thresholds than at modulating thresholds lowered by cocaine, implying that as dopaminergic activity increases, GABAergic activity must also increase in order to exert its inhibitory influence on dopaminergic activity. C1 BOSTON UNIV,SCH MED,DEPT PHARMACOL,BOSTON,MA 02118. BOSTON UNIV,SCH MED,DEPT PSYCHIAT,BOSTON,MA 02118. BROOKHAVEN NATL LAB,ASSOCIATED UNIVS INC,DEPT CHEM,UPTON,NY 11973. FU NIDA NIH HHS [DA02326, KO5-DA00099]; NIMH NIH HHS [MH49165] NR 24 TC 63 Z9 64 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0033-3158 J9 PSYCHOPHARMACOLOGY JI Psychopharmacology PD OCT PY 1997 VL 133 IS 4 BP 383 EP 388 DI 10.1007/s002130050418 PG 6 WC Neurosciences; Pharmacology & Pharmacy; Psychiatry SC Neurosciences & Neurology; Pharmacology & Pharmacy; Psychiatry GA YC397 UT WOS:A1997YC39700011 PM 9372539 ER PT J AU Sachs, RK Brenner, DJ Chen, AM Hahnfeldt, P Hlatky, LR AF Sachs, RK Brenner, DJ Chen, AM Hahnfeldt, P Hlatky, LR TI Intra-arm and interarm chromosome intrachanges: Tools for probing the geometry and dynamics of chromatin SO RADIATION RESEARCH LA English DT Article ID DOUBLE-STRAND BREAKS; IN-SITU HYBRIDIZATION; DIRECT BIOLOGICAL EVIDENCE; NORMAL HUMAN-FIBROBLASTS; HIROSHIMA ATOMIC-BOMB; HUMAN-LYMPHOCYTES; IONIZING-RADIATION; PARTICLE IRRADIATION; MOLECULAR ANALYSIS; GAMMA-RADIATION AB Many chromosome-type, exchange-type chromosomal aberrations produced by radiation are intrachanges, i.e. involve only one chromosome. It is assumed such intrachanges are formed by illegitimate reunion of two double-strand breaks (DSBs) on the chromosome. The yield of intra-arm intrachanges (acentric rings or paracentric inversions) relative to that of interarm intrachanges (acentric rings or pericentric inversions) is larger than would occur if production and illegitimate reunion of DSBs were spatially random. The excess of intra-arm intrachanges is presumably due to proximity effects for illegitimate reunions, i.e. enhancement of the intrachange probability when two DSBs are formed close to one another. Radiation track structure may also play a role. Using a polymer description for ''large-scale'' chromatin geometry (>2 Mb), and using two alternate (rapid or slow motion) models for the way that DSBs move after they are produced, theoretical estimates are given for size distributions of intrachanges at low or high linear energy transfer (LET). The ratio of intra-arm to interarm intrachanges is derived from the size distribution and compared with data from the literature on centric rings, inversions, interstitial deletions and excess acentric fragments. Proximity effects enhance yields of intra-arm relative to interarm intrachanges at least severalfold and perhaps as much as 10-fold compared to expectations based on spatial randomness. We argue that further measurements of intra-arm and interarm intrachanges would be informative about large-scale chromatin structure and chromosome motion. Because inversions are more frequent than estimates of randomness would indicate, and are transmissible to daughter cells, their size distribution could also help characterize past exposure to high-LET radiation. (C) 1997 by Radiation Research Society. C1 COLUMBIA UNIV,CTR RADIOL RES,NEW YORK,NY 10032. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. HARVARD UNIV,SCH MED,JOINT CTR RADIAT THERAPY,BOSTON,MA 02115. RP Sachs, RK (reprint author), UNIV CALIF BERKELEY,DEPT MATH,BERKELEY,CA 94720, USA. FU NCI NIH HHS [CA 63897-03]; NIEHS NIH HHS [ES07361] NR 70 TC 42 Z9 42 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD OCT PY 1997 VL 148 IS 4 BP 330 EP 340 DI 10.2307/3579518 PG 11 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA YA744 UT WOS:A1997YA74400005 PM 9339949 ER PT J AU Klopfel, D Holzer, G Forster, E Beiersdorfer, P AF Klopfel, D Holzer, G Forster, E Beiersdorfer, P TI A quartz quasimonolith for absolute x-ray wavelength measurements SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID BEAM ION-TRAP; 1S LAMB SHIFT; ISOELECTRONIC SEQUENCE; PRECISION-MEASUREMENT; NE-LIKE; REMEASUREMENT; SPECTROMETER; TRANSITIONS; ENERGY; LINES AB We have constructed a quasimonolithic crystal consisting of two offset, parallel-mounted quartz (<10(1)over bar 0>) crystals for determining the wavelengths of x-ray transitions on an absolute scale without the need for reference lines. The design and organization of the quasimonolith crystal device, as well as the determination of the relevant parameters and their corresponding uncertainties are discussed. A calibration chain is established that enables Linking any wavelength measurement directly to optical wavelength standards and thus to SI units. Our analysis shows that absolute wavelength measurements with an uncertainty of one part per million are in principle possible with the device. Implementation of the quartz quasimonolith in a high-resolution vacuum spectrometer used to study x-ray line emission from an electron beam ion trap is described. (C) 1997 American Institute of Physics. C1 LAWRENCE LIVERMORE NATL LAB,DEPT PHYS & SPACE TECHNOL,LIVERMORE,CA 94550. RP Klopfel, D (reprint author), UNIV JENA,MAX PLANCK ARBEITSGRP RONTGENOPT,MAX WIEN PL 1,D-07743 JENA,GERMANY. NR 36 TC 11 Z9 11 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD OCT PY 1997 VL 68 IS 10 BP 3669 EP 3675 PG 7 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA YB160 UT WOS:A1997YB16000005 ER PT J AU Kane, BE Dzurak, AS Facer, GR Clark, RG Starrett, RP Skougarevsky, A Lumpkin, NE Brooks, JS Engel, LW Miura, N Yokoi, H Takamasu, T Nakagawa, H Goettee, JD Rickel, DG AF Kane, BE Dzurak, AS Facer, GR Clark, RG Starrett, RP Skougarevsky, A Lumpkin, NE Brooks, JS Engel, LW Miura, N Yokoi, H Takamasu, T Nakagawa, H Goettee, JD Rickel, DG TI Measurement instrumentation for electrical transport experiments in extreme pulsed magnetic fields generated by flux compression SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB We describe purpose-built instrumentation that has proved successful in making transport measurements of materials in ultrahigh magnetic fields generated by explosive-driven flux compression. The experimental arrangement minimizes severe problems of heating and pick-up associated with the microsecond pulsed field: for which dB/dt can be as large as 10(9) T/s. Electrical connection to multiple samples in the high field region is via long, lithographically-defined, nested coplanar transmission lines. Contactless measurements by capacitive coupling, as well as resistively coupled measurements, are made at frequencies of order 1 GHz so that pick-up from the microsecond pulse can be effectively filtered. We demonstrate our technique with data on semiconductor samples taken to 450 T using Russian MC-1 type flux compression generators combined with U.S. explosives at the Ancho Canyon firing point, Los Alamos National Laboratory. We discuss the obstacles encountered during these experiments, and outline improvements and refinements of our technique that should enable transport measurements to be made in the highest obtainable magnetic fields (similar to 1000 T) in samples at temperatures not exceeding a few kelvin. This technology may also be valuable for transport measurements in nondestructive pulsed fields of millisecond duration, now available in many laboratories worldwide. (C) 1997 American Institute of Physics. C1 UNIV NEW S WALES,SCH PHYS,SEMICOND NANOFABRICAT FACIL,SYDNEY,NSW 2052,AUSTRALIA. FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306. UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. CSIRO,DIV RADIOPHYS,EPPING,NSW 2121,AUSTRALIA. RP Kane, BE (reprint author), UNIV NEW S WALES,SCH PHYS,NATL PULSED MAGNET LAB,SYDNEY,NSW 2052,AUSTRALIA. RI Dzurak, Andrew/C-5973-2009; Goettee, Jeffrey/L-4926-2015 NR 22 TC 15 Z9 17 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD OCT PY 1997 VL 68 IS 10 BP 3843 EP 3860 DI 10.1063/1.1148037 PG 18 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA YB160 UT WOS:A1997YB16000035 ER PT J AU Wallerstein, G Iben, I Parker, P Boesgaard, AM Hale, GM Champagne, AE Barnes, CA Kappeler, F Smith, VV Hoffman, RD Timmes, FX Sneden, C Boyd, RN Meyer, BS Lambert, DL AF Wallerstein, G Iben, I Parker, P Boesgaard, AM Hale, GM Champagne, AE Barnes, CA Kappeler, F Smith, VV Hoffman, RD Timmes, FX Sneden, C Boyd, RN Meyer, BS Lambert, DL TI Synthesis of the elements in stars: Forty years of progress SO REVIEWS OF MODERN PHYSICS LA English DT Article; Proceedings Paper CT Nuclei in the Cosmos III Conference CY JUN, 1996 CL NOTRE DAME UNIV, NOTRE DAME, IN HO NOTRE DAME UNIV ID ASYMPTOTIC GIANT BRANCH; S-PROCESS NUCLEOSYNTHESIS; CAPTURE CROSS-SECTIONS; NEUTRINO-DRIVEN WINDS; METAL-POOR STARS; BIG-BANG NUCLEOSYNTHESIS; CARBON ISOTOPE RATIOS; WOLF-RAYET STARS; LUMINOUS BLUE VARIABLES; GLOBULAR-CLUSTER GIANTS AB Forty years ago Burbidge, Burbidge, Fowler, and Hoyle combined what we would now call fragmentary evidence from nuclear physics, stellar evolution and the abundances of elements and isotopes in the solar system as well as a few stars into a synthesis of remarkable ingenuity. Their review provided a foundation for forty years of research in all of the aspects of low energy nuclear experiments and theory, stellar modeling over a wide range of mass and composition, and abundance studies of many hundreds of stars, many of which have shown distinct evidence of the processes suggested by (BFH)-F-2. In this review we summarize progress in each of these fields with emphasis on the most recent developments. [S0034-6861(97)00204-3]. C1 UNIV ILLINOIS, URBANA, IL 61801 USA. YALE UNIV, NEW HAVEN, CT 06520 USA. UNIV HAWAII, INST ASTRON, HONOLULU, HI 96822 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV N CAROLINA, CHAPEL HILL, NC 27594 USA. DUKE UNIV, TRIANGLE UNIV NUCL LAB, DURHAM, NC 27706 USA. CALTECH, PASADENA, CA 91125 USA. FORSCHUNGSZENTRUM KARLSRUHE, D-76021 KARLSRUHE, GERMANY. UNIV TEXAS, EL PASO, TX 79968 USA. UNIV ARIZONA, STEWARD OBSERV, TUCSON, AZ 85721 USA. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. UNIV TEXAS, AUSTIN, TX 78712 USA. OHIO STATE UNIV, COLUMBUS, OH 43210 USA. CLEMSON UNIV, CLEMSON, SC 29630 USA. UNIV TEXAS, AUSTIN, TX 78712 USA. RP Wallerstein, G (reprint author), UNIV WASHINGTON, DEPT ASTRON, SEATTLE, WA 98195 USA. NR 834 TC 371 Z9 380 U1 6 U2 31 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0034-6861 J9 REV MOD PHYS JI Rev. Mod. Phys. PD OCT PY 1997 VL 69 IS 4 BP 995 EP 1084 DI 10.1103/RevModPhys.69.995 PG 90 WC Physics, Multidisciplinary SC Physics GA YE789 UT WOS:A1997YE78900001 ER PT J AU Baldwin, GC Solem, JC AF Baldwin, GC Solem, JC TI Recoilless gamma-ray lasers SO REVIEWS OF MODERN PHYSICS LA English DT Review ID NUCLEAR-EXCITATION; STIMULATED-EMISSION; POPULATION-INVERSION; ELECTRON TRANSITION; SYNCHROTRON RADIATION; PUMPING REQUIREMENTS; QUANTUM COHERENCE; SHELL ELECTRONS; SUPER-RADIANCE; X-RAYS AB This review is addresses to the development of lasers that might generate coherent radiation at ultrashort wavelengths by simulating recoilless nuclear transitions in solids. First, the authors review the basic physics of simulated emission, superradiance and the kinetics of lasing, with particular attention to those aspects that characterise recoilless nuclear transitions in solid hosts. Then they classify the various approaches to pumping that have been proposed for resolving the ''graser dilemma'' - that the pump can destroy the conditions essential to gain - and discuss the general requirements for specification of an active nuclide and its solid host. The authors then classify and review those graser systems proposed wince 1980 and prior to July 1996 in the published literature of the field, namely (1) those that would pump directly, either with radiation or with intense bursts of neutrons; (2) those that would pump indirectly by first generating a nuclear isomer; (3) those that would eliminate the need for population inversion; and (4) several miscellaneous concepts. The significance of recent relevant experiments is described and discussed, and, finally, recommendations for future research are made. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. NR 224 TC 86 Z9 89 U1 1 U2 6 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0034-6861 EI 1539-0756 J9 REV MOD PHYS JI Rev. Mod. Phys. PD OCT PY 1997 VL 69 IS 4 BP 1085 EP 1117 DI 10.1103/RevModPhys.69.1085 PG 33 WC Physics, Multidisciplinary SC Physics GA YE789 UT WOS:A1997YE78900002 ER PT J AU Perelson, AS Weisbuch, G AF Perelson, AS Weisbuch, G TI Immunology for physicists SO REVIEWS OF MODERN PHYSICS LA English DT Review ID HUMORAL IMMUNE-RESPONSE; MEDIATED CYTO-TOXICITY; B-CELL REPERTOIRE; SELF-NONSELF DISCRIMINATION; HIGH-DIMENSIONAL SIMULATION; SHAPE-SPACE MODEL; HIV-INFECTION; MATHEMATICAL-MODEL; IDIOTYPIC NETWORKS; CLONAL SELECTION AB The immune system is a complex system of cells and molecules that can provide us with a basic defense against pathogenic organisms, Like the nervous system, the immune system performs pattern recognition tasks, learns, and retains a memory of the antigens that it has fought. The immune system contains more than 10(7) different clones of cells that communicate via cell-cell contact and the secretion of molecules. Performing complex tasks such as learning and memory involves cooperation among large numbers of components of the immune system and hence there is interest in using methods and concepts from statistical physics. Furthermore, the immune response develops in time and the description of its time evolution is an interesting problem in dynamical systems. In this paper, the authors provide a brief introduction to the biology of the immune system and discuss a number of immunological problems in which the use of physical concepts and mathematical methods has increased our understanding. [S0034-6861(97)00404-2]. C1 ECOLE NORMALE SUPER, PHYS STAT LAB, F-75231 PARIS 5, FRANCE. RP Perelson, AS (reprint author), LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. NR 254 TC 305 Z9 322 U1 2 U2 25 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0034-6861 J9 REV MOD PHYS JI Rev. Mod. Phys. PD OCT PY 1997 VL 69 IS 4 BP 1219 EP 1267 DI 10.1103/RevModPhys.69.1219 PG 49 WC Physics, Multidisciplinary SC Physics GA YE789 UT WOS:A1997YE78900005 ER PT J AU Nero, AV AF Nero, AV TI Breast cancer, radon, and brassieres??? SO RISK ANALYSIS LA English DT Letter ID RISK RP Nero, AV (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BLDG 90,ROOM 3058,BERKELEY,CA 94720, USA. NR 7 TC 1 Z9 1 U1 0 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD OCT PY 1997 VL 17 IS 5 BP 525 EP 526 DI 10.1111/j.1539-6924.1997.tb00893.x PG 2 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA YK071 UT WOS:A1997YK07100001 PM 9404042 ER PT J AU Metz, WC Clark, DE AF Metz, WC Clark, DE TI The effect of decisions about spent nuclear fuel storage on residential property values SO RISK ANALYSIS LA English DT Article DE risk; perceptions; spent nuclear fuel; residential property; behavior ID ECONOMIC-IMPACTS; WASTE; RISK; PRICES; SITE AB National, regional, state, and local surveys have revealed that people have intensely negative images of ''nuclear'' and ''radioactive'' technologies, activities, and facilities, as well as associated fears of stigmatization. In light of these perceptions, the debate over where to temporarily store or permanently dispose of spent nuclear fuel (at the reactor site, an interim storage facility, or a permanent repository) provokes immense concern among possible host jurisdictions. To address these concerns, one needs to know if people's subjective opinions conform with the choices they make and are therefore reflected in their economic behavior. Argonne National Laboratory researchers used a hedonic model to complete a study of residential property value dynamics over a 5-year period within a 15-mile radius of two California nuclear power plants. They tracked the economic ramifications of decisions about the spent nuclear fuel stored at those reactors. The study revealed that no significant negative effects on residential property values resulted from a decision to move spent nuclear fuel from wet storage to a dry-cask storage facility or from a request to extend the reactor operating permit (given future changes in the type of nuclear fuel storage facility that would accompany such an extension). C1 MARQUETTE UNIV,DEPT ECON,MILWAUKEE,WI 53201. RP Metz, WC (reprint author), ARGONNE NATL LAB,DECIS & INFORMAT SCI DIV,9700 S CASS AVE,BLDG 900,ARGONNE,IL 60439, USA. NR 23 TC 12 Z9 12 U1 3 U2 6 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4332 J9 RISK ANAL JI Risk Anal. PD OCT PY 1997 VL 17 IS 5 BP 571 EP 582 DI 10.1111/j.1539-6924.1997.tb00898.x PG 12 WC Public, Environmental & Occupational Health; Mathematics, Interdisciplinary Applications; Social Sciences, Mathematical Methods SC Public, Environmental & Occupational Health; Mathematics; Mathematical Methods In Social Sciences GA YK071 UT WOS:A1997YK07100006 ER PT J AU Zurek, WH AF Zurek, WH TI Decoherent state SO SCIENTIFIC AMERICAN LA English DT Letter RP Zurek, WH (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SCI AMERICAN INC PI NEW YORK PA 415 MADISON AVE, NEW YORK, NY 10017 SN 0036-8733 J9 SCI AM JI Sci.Am. PD OCT PY 1997 VL 277 IS 4 BP 8 EP 8 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XW437 UT WOS:A1997XW43700007 ER PT J AU Painter, GS AF Painter, GS TI Mechanism of boron-induced embrittlement of Ni3Al in hydrogen SO SCRIPTA MATERIALIA LA English DT Article ID ENVIRONMENTAL EMBRITTLEMENT; DUCTILITY; BOUNDARIES; FRACTURE RP Painter, GS (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 19 TC 2 Z9 2 U1 1 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD OCT 1 PY 1997 VL 37 IS 7 BP 1023 EP 1029 DI 10.1016/S1359-6462(97)00204-2 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA XW414 UT WOS:A1997XW41400019 ER PT J AU Popov, AA Pyshmintsev, IY Demakov, SL Illarionov, AG Lowe, TC Sergeyeva, AV Valiev, RZ AF Popov, AA Pyshmintsev, IY Demakov, SL Illarionov, AG Lowe, TC Sergeyeva, AV Valiev, RZ TI Structural and mechanical, properties of nanocrystalline titanium processed by severe plastic deformation SO SCRIPTA MATERIALIA LA English DT Article ID GRAINED COPPER; MG ALLOY C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UFA STATE AVIAT TECH UNIV,INST ADV MAT PHYS,UFA 450000,RUSSIA. RP Popov, AA (reprint author), URAL STATE TECH UNIV,EKATERINBURG 620000,RUSSIA. RI Popov, Artemiy/G-3947-2016 OI Popov, Artemiy/0000-0001-6171-1701 NR 14 TC 93 Z9 97 U1 3 U2 19 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD OCT 1 PY 1997 VL 37 IS 7 BP 1089 EP 1094 DI 10.1016/S1359-6462(97)00210-8 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA XW414 UT WOS:A1997XW41400029 ER PT J AU Hong, J Lee, JW MacKenzie, JD Donovan, SM Abernathy, CR Pearton, SJ Zolper, JC AF Hong, J Lee, JW MacKenzie, JD Donovan, SM Abernathy, CR Pearton, SJ Zolper, JC TI Comparison of GaN, InN and AIN powders for susceptor-based rapid annealing of group III nitride materials SO SEMICONDUCTOR SCIENCE AND TECHNOLOGY LA English DT Article ID MOLECULAR-BEAM EPITAXY; GROWTH; FILMS; DIODES; GAAS AB We have compared the use of GaN, InN and AlN powders for providing a nitrogen partial pressure within a graphite susceptor during high-temperature rapid thermal annealing of GaN, AlN, InN and InAlN. At temperatures above similar to 750 degrees C vapour transport of In from InN powder produces In droplet condensation on the surface of all nitride samples being annealed, GaN powder provides better surface protection than AlN powders for temperatures up to similar to 1050 degrees C when annealing GaN and AlN samples. Dissociation of nitrides from the surface is found to occur with approximate activation energies of 3.8 eV, 4.4 eV and 3.4 eV, respectively, for GaN, AlN and InN. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP Hong, J (reprint author), UNIV FLORIDA,DEPT MAT SCI & ENGN,GAINESVILLE,FL 32611, USA. NR 23 TC 12 Z9 12 U1 3 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0268-1242 J9 SEMICOND SCI TECH JI Semicond. Sci. Technol. PD OCT PY 1997 VL 12 IS 10 BP 1310 EP 1318 DI 10.1088/0268-1242/12/10/020 PG 9 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Physics, Condensed Matter SC Engineering; Materials Science; Physics GA YB052 UT WOS:A1997YB05200019 ER PT J AU Gehmeyr, M Cheng, B Mihalas, D AF Gehmeyr, M Cheng, B Mihalas, D TI Noh's constant-velocity shock problem revisited SO SHOCK WAVES LA English DT Article DE Noh's shock problem; shock reflection; self-similar shock; planar and converging geometry; implicit adaptive grid algorithms ID RADIATION-HYDRODYNAMICS; ERRORS AB We present the solutions to Noh's shock tube problem in planar, cylindrical, and spherical geometry. This problem has the well-deserved reputation of being challenging to numerical methods. Since the gas is initially cold there are infinitely many reflections of the shock between the fixed wall and the piston as the piston moves with constant velocity towards the wall. An implicit adaptive grid algorithm allows us, for the first time, to generate the complete solutions in these three geometries. We discuss them in detail, in particular follow the shock over many reflections, and perform numerical consistency checks. For the planar case the exact analytical solution is derived, and the numerical error in all physical quantities is found to be less than 1% on a 100 grid-point computational domain. For the converging geometries an approximate analytical theory is presented, and the deviations between the theory and the numerical re suits are found to be less than 10% on the same domain. A substantial part of this total error is due to errors in the approximate analytical results. We discuss the physics of the shock reflection in the three geometries, and analyze in particular the finite amount of entropy that is produced after the the first shock reflection. In an appendix we present some details of our code and demonstrate that the adaptive grid permits us to carry out computations of extreme precision. The reliability of our solutions in all three geometries allows them to become demanding tests for 2D and 3D codes. C1 UNIV ILLINOIS,NATL CTR SUPERCOMP APPLICAT,URBANA,IL 61801. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP Gehmeyr, M (reprint author), UNIV ILLINOIS,DEPT ASTRON,LAB COMPUTAT ASTROPHYS,URBANA,IL 61801, USA. NR 25 TC 10 Z9 11 U1 0 U2 4 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0938-1287 J9 SHOCK WAVES JI Shock Waves PD OCT PY 1997 VL 7 IS 5 BP 255 EP 274 DI 10.1007/s001930050081 PG 20 WC Mechanics SC Mechanics GA YA753 UT WOS:A1997YA75300001 ER PT J AU Eaton, WP Smith, JH AF Eaton, WP Smith, JH TI Micromachined pressure sensors: Review and recent developments SO SMART MATERIALS AND STRUCTURES LA English DT Review ID POLYSILICON FILMS; CONVEX CORNERS; AQUEOUS KOH; SILICON; FABRICATION; PERFORMANCE; MICROPHONES; TRANSDUCER; DIAPHRAGMS; BACKPLATE AB Since the discovery of piezoresistivity in silicon in the mid 1950s, silicon-based pressure sensors have been widely produced. Micromachining technology has greatly benefited from the success of the integrated circuit industry, borrowing materials, processes, and toolsets. Because of this, microelectromechanical systems (MEMS) are now poised to capture large segments of existing sensor markets and to catalyse the development of new markets. Given the emerging importance of MEMS, it is instructive to review the history of micromachined pressure sensors, and to examine new developments in the field. Pressure sensors will be the focus of this paper, starting from metal diaphragm sensors with bonded silicon strain gauges, and moving to present developments of surface-micromachined, optical, resonant, and smart pressure sensors. Considerations for diaphragm design will be discussed in detail, as well as additional considerations for capacitive and piezoresistive devices. Results from surface-micromachined pressure sensors developed by the authors will be presented. Finally, advantages of micromachined sensors will be discussed. C1 SANDIA NATL LABS, INTELLIGENT MICROMACHINES DEPT, ALBUQUERQUE, NM 87185 USA. NR 85 TC 231 Z9 236 U1 24 U2 173 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0964-1726 EI 1361-665X J9 SMART MATER STRUCT JI Smart Mater. Struct. PD OCT PY 1997 VL 6 IS 5 BP 530 EP 539 DI 10.1088/0964-1726/6/5/004 PG 10 WC Instruments & Instrumentation; Materials Science, Multidisciplinary SC Instruments & Instrumentation; Materials Science GA YD692 UT WOS:A1997YD69200004 ER PT J AU Zollner, S Myers, KD Jensen, KG Dolan, JM Bailey, DW Stanton, CJ AF Zollner, S Myers, KD Jensen, KG Dolan, JM Bailey, DW Stanton, CJ TI Femtosecond interband hole scattering in Ge studied by pump-probe reflectivity SO SOLID STATE COMMUNICATIONS LA English DT Article ID PHONON DEFORMATION POTENTIALS; ABINITIO PSEUDOPOTENTIAL CALCULATIONS; DIRECT BAND-EDGE; TETRAHEDRAL SEMICONDUCTORS; ZINCBLENDE SEMICONDUCTORS; ULTRAFAST THERMALIZATION; NONEQUILIBRIUM HOLES; PHOTOEXCITED HOLES; INFRARED PULSES; GERMANIUM AB We have measured the transient reflectivity changes of bulk Ge after excitation with 140 fs laser pulses at 1.5 eV. The electron and hole dynamics are calculated using an ensemble Monte Carlo method. We find that the observed reflectivity changes are due to three main mechanisms: diffusion, band gap renormalization, and carrier dynamics, particularly scattering of light holes to the heavy hole band via the optical deformation potential interaction. Because of the unique band structure of Ge and the use of a reflectivity technique, we can isolate the role of the light holes with femtosecond time resolution. The Monte Carlo simulation (which uses an optical deformation potential for holes of d(0)=46 eV) overestimates the scattering rate of light holes to the heavy hole band. The agreement can be improved when a lower value for the deformation potential (determined from theory or other experiments) is used. (C) 1997 Elsevier Science Ltd. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. UNIV S CAROLINA,DEPT ELECT & COMP ENGN,COLUMBIA,SC 29208. UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. RI Zollner, Stefan/B-4858-2012 OI Zollner, Stefan/0000-0001-7752-7941 NR 41 TC 16 Z9 16 U1 2 U2 10 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD OCT PY 1997 VL 104 IS 1 BP 51 EP 55 DI 10.1016/S0038-1098(97)00068-9 PG 5 WC Physics, Condensed Matter SC Physics GA XX075 UT WOS:A1997XX07500010 ER PT J AU Coddens, G Viano, AM Gibbons, PC Kelton, KF Kramer, MJ AF Coddens, G Viano, AM Gibbons, PC Kelton, KF Kramer, MJ TI Time-of-flight neutron scattering study of hydrogen dynamics in icosahedral Ti45Zr38Ni17H150 quasicrystals SO SOLID STATE COMMUNICATIONS LA English DT Article DE quasicrystals; neutron scattering ID QUASI-CRYSTALS AB We report the first time-of-flight (T.O.F) quasielastic neutron scattering results on hydrogen motion in quasicrystals. The data show that some of the hydrogen is chemically bound. (C) 1997 Elsevier Science Ltd. C1 WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. DOE LABS,AMES,IA 50011. RP Coddens, G (reprint author), CEA,LAB LEON BRILLOUIN,CNRS,F-91191 GIF SUR YVETTE,FRANCE. NR 9 TC 13 Z9 13 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD OCT PY 1997 VL 104 IS 3 BP 179 EP 182 DI 10.1016/S0038-1098(97)00110-5 PG 4 WC Physics, Condensed Matter SC Physics GA XZ354 UT WOS:A1997XZ35400011 ER PT J AU Pagliuso, PG Rettori, C Oseroff, SB Sarrao, J Fisk, Z Cornelius, A Hundley, MF AF Pagliuso, PG Rettori, C Oseroff, SB Sarrao, J Fisk, Z Cornelius, A Hundley, MF TI ESR of Gd3+ in LuInCu4 intermetallic compound SO SOLID STATE COMMUNICATIONS LA English DT Article ID VALENCE PHASE-TRANSITION; YBXIN1-XCU2 AB Electron spin resonance (ESR) experiments of paramagnetic ions in metallic compounds have been used to investigate the interaction between conduction-electron (c-e) and paramagnetic ions. The Gd3+ Korringa rate and g-shift measured in ESR, the susceptibility and specific heat data of LuInCu4, allowed us to extract the exchange parameters between the Gd3+ local moments and the c-e in this compound. These parameters were found to be c-e wave-vector dependent. (C) 1997 Published by Elsevier Science Ltd. C1 FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP Pagliuso, PG (reprint author), UNICAMP,INST FIS GLEB WATAGHIN,BR-13083970 CAMPINAS,SP,BRAZIL. RI Cornelius, Andrew/A-9837-2008; Rettori, Carlos/C-3966-2012; Pagliuso, Pascoal/C-9169-2012; Inst. of Physics, Gleb Wataghin/A-9780-2017 OI Rettori, Carlos/0000-0001-6692-7915; NR 21 TC 6 Z9 6 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD OCT PY 1997 VL 104 IS 4 BP 223 EP 226 DI 10.1016/S0038-1098(97)00318-9 PG 4 WC Physics, Condensed Matter SC Physics GA YB551 UT WOS:A1997YB55100007 ER PT J AU Hsieh, G Ford, SJ Mason, TO Pederson, LR AF Hsieh, G Ford, SJ Mason, TO Pederson, LR TI Experimental limitations in impedance spectroscopy .6. Four-point measurements of solid materials systems SO SOLID STATE IONICS LA English DT Article DE impedance spectroscopy; four-point measurements ID YTTRIA-STABILIZED ZIRCONIA; CONDUCTIVITY; ELECTROLYTES; CONTACTS AB Four-paint impedance spectroscopy of solid materials systems is severely hampered by unavoidable voltage-divider effects associated with the reference electrodes. As demonstrated by test circuit studies and experiments with Pt/YSZ/Pt cells (with embedded sliver reference electrodes), high impedance reference electrodes can produce distorted and erroneous impedance data. The relationships between these data and the sample properties (conductivity, dielectric constant) and instrument Limitations (input impedance/capacitance) are derived. Successful four-point impedance measurements on conductive systems require large effective dielectric constants, which may be unattainable in bulk solids, but are often associated with internal interfaces. C1 NORTHWESTERN UNIV, DEPT MAT SCI & ENGN, EVANSTON, IL 60208 USA. PACIFIC NW LAB, DEPT CHEM & MAT SCI, RICHLAND, WA 99352 USA. RI Mason, Thomas/B-7528-2009 NR 32 TC 21 Z9 21 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2738 J9 SOLID STATE IONICS JI Solid State Ion. PD OCT PY 1997 VL 100 IS 3-4 BP 297 EP 311 DI 10.1016/S0167-2738(97)00355-X PG 15 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA YF374 UT WOS:A1997YF37400016 ER PT J AU Britten, JA AF Britten, JA TI A moving-zone Marangoni drying process for critical cleaning and wet processing SO SOLID STATE TECHNOLOGY LA English DT Article ID FILM AB A moving-zone Marangoni drying process can be integrated into an aqueous processing track to allow processing, rinsing, and drying of a single surface of a large flat substrate in one consolidated application. This ambient temperature process uses negligible amounts of organic material and surfactant-free deionized water to provide ultraclean drying of critical surfaces. RP Britten, JA (reprint author), LAWRENCE LIVERMORE NATL LAB,7000 E AVE,L-439,LIVERMORE,CA 94550, USA. NR 11 TC 6 Z9 6 U1 1 U2 3 PU PENNWELL PUBL CO SOLID STATE TECHNOLOGY OFFICE PI NASHUA PA TEN TARA BLVD 5TH FLOOR, NASHUA, NH 03062-2801 SN 0038-111X J9 SOLID STATE TECHNOL JI Solid State Technol. PD OCT PY 1997 VL 40 IS 10 BP 143 EP & PG 4 WC Engineering, Electrical & Electronic; Physics, Applied; Physics, Condensed Matter SC Engineering; Physics GA XZ353 UT WOS:A1997XZ35300024 ER PT J AU Ferraro, JR Martin, K Jarnutowski, RJ AF Ferraro, JR Martin, K Jarnutowski, RJ TI Five-year summary of commercial instrumentation for absorption spectroscopy (1992-1996) - An update SO SPECTROSCOPY LA English DT Article ID SILVER ISLAND FILMS; ENHANCED INFRARED-ABSORPTION; RAMAN-SPECTROSCOPY; OPTICAL FIBERS; FT-IR; SPECTROMETER; MONOLAYERS; SPECTRA AB This article is an update of a 50-year chronology of commercial instrumentation for Raman, IR, UV/Vis, and NMR. The first of two parts, it focuses on new products and general trends in Raman, IR, and UV/Vis instrumentation during the five-year period from 1992-1996. The second part will cover NMR products. Additional supporting details can be found on Spectroscopy's Web site (http://www.spectroscopymag.com). C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. HELENE CURTIS,ROLLING MEADOWS,IL 60008. INPHARM TECH,STEPHENSON,MI 49887. NR 54 TC 2 Z9 2 U1 1 U2 2 PU ADVANSTAR COMMUNICATIONS PI DULUTH PA 131 W FIRST ST, DULUTH, MN 55802 SN 0887-6703 J9 SPECTROSCOPY JI Spectroscopy PD OCT PY 1997 VL 12 IS 8 BP 18 EP & PG 22 WC Spectroscopy SC Spectroscopy GA YA412 UT WOS:A1997YA41200003 ER PT J AU Mogro-Campero, A Johnson, CA Bednarczyk, PJ Dinwiddie, RB Wang, H AF Mogro-Campero, A Johnson, CA Bednarczyk, PJ Dinwiddie, RB Wang, H TI Effect of gas pressure on thermal conductivity of zirconia thermal barrier coatings SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 24th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 97) CY APR 21-25, 1997 CL SAN DIEGO, CALIFORNIA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE gas pressure; thermal conductivity; zirconia thermal barrier coatings ID SPRAYED COATINGS; ZRO2; DIFFUSIVITY AB The thermal diffusivity thermal barrier coatings (zirconia stabilized with 7-8 wt% yttria) deposited by air plasma spraying has been measured by the laser flash method. Free-standing samples (0.5-0.6-mm thick) polished on both sides wen coated with graphite. Deduced values of thermal conductivity (e.g., 1.5 W m(-1) K-1 at 200 degrees C in 1 atm. of nitrogen) are in the range measured in other studies for this type of thermal barrier coating. The % increase in thermal conductivity in I arm. of gas compared to its value in vacuum was found to be about 10% in nitrogen at 500 degrees C, close to a calculated value of 7% using a model in the literature. A simple extension of the model to higher temperatures and gas pressures predicts a significant rise, so that by 10 atm. of gas pressure the % increase would be 30% (with little sensitivity to temperature). (C) 1997 Elsevier Science S.A. C1 GE, Ctr Res & Dev, Niskayuna, NY 12309 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Mogro-Campero, A (reprint author), GE, Ctr Res & Dev, 1 Res Circle, Niskayuna, NY 12309 USA. RI Wang, Hsin/A-1942-2013 OI Wang, Hsin/0000-0003-2426-9867 NR 13 TC 14 Z9 14 U1 0 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD OCT PY 1997 VL 94-5 IS 1-3 BP 102 EP 105 DI 10.1016/S0257-8972(97)00485-4 PG 4 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA YL682 UT WOS:000070981000018 ER PT J AU Leushake, U Krell, T Schulz, U Peters, M Kaysser, WA Rabin, BH AF Leushake, U Krell, T Schulz, U Peters, M Kaysser, WA Rabin, BH TI Microstructure and phase stability of EB-PVD alumina and alumina/zirconia for thermal barrier coating applications SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 24th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 97) CY APR 21-25, 1997 CL SAN DIEGO, CALIFORNIA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE EB-PVD; microstructure; thermal barrier coatings; alumina ID DEPOSITION AB This paper describes recent progress on research aimed at improving the performance of EB-PVD thermal barrier coatings (TBCs) for gas turbine applications by incorporating alumina as an oxygen diffusion barrier between the bond coat and zirconia. Two approaches are being investigated, either a single, discrete alumina layer, or a graded alumina/zirconia layer. This paper reports on preliminary experiments in which alumina was evaporated under different conditions, and the phase content and morphology of the coatings were characterized. Deposition rate and chamber pressure had a significant effect on the microstructure of the coatings; however, phase formation was essentially unaffected. In agreement with previously published results, alpha-Al2O3 was produced either by in situ deposition on substrates heated to temperatures near 1000 degrees C, or by heat treatment of metastable as-deposited alumina coatings at temperatures above 1100 degrees C, By continuously changing the vaporization ratio of alumina and zirconia as a function of deposition time, TBCs exhibiting composition gradients through the film thickness were produced. In related work, suitable source materials for alumina deposition were produced using a new sinterless powder processing route involving bimodal powder mixtures. (C) 1997 Elsevier Science S.A. C1 DLR, German Aerosp Res Estab, Inst Mat Res, D-51140 Cologne, Germany. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Leushake, U (reprint author), DLR, German Aerosp Res Estab, Inst Mat Res, D-51140 Cologne, Germany. NR 16 TC 38 Z9 40 U1 0 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD OCT PY 1997 VL 94-5 IS 1-3 BP 131 EP 136 DI 10.1016/S0257-8972(97)00490-8 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA YL682 UT WOS:000070981000023 ER PT J AU Anders, S Callahan, DL Pharr, GM Tsui, TY Bhatia, CS AF Anders, S Callahan, DL Pharr, GM Tsui, TY Bhatia, CS TI Multilayers of amorphous carbon prepared by cathodic arc deposition SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 24th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 97) CY APR 21-25, 1997 CL SAN DIEGO, CALIFORNIA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE amorphous carbon film; cathodic arc deposition; Monte Carlo simulation ID DIAMOND-LIKE CARBON; ELASTIC-MODULUS; THIN-FILMS; VACUUM; HARDNESS AB Filtered cathodic are deposition is an effective technique for preparing amorphous hard carbon films of high quality. Pulsed biasing of the substrate leads to a variation of the ion energy. Therefore the film properties, which are influenced by the ion energy, can be changed over a wide range. Using an alternating high- and low-bias voltage, we have formed multilayers of hard and soft amorphous carbon films. The structure and mechanical properties of the multilayers were investigated by transmission electron microscopy and nanoindentation. They are discussed in relation to Monte Carlo computer simulations of the deposition process. It was found that the multilayer structure formation can be well predicted by the Monte Carlo computer code. (C) 1997 Elsevier Science S.A. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Rice Univ, Dept Mat Sci, Houston, TX 77005 USA. Adv Micro Devices Inc, Sunnyvale, CA 94088 USA. IBM Corp, SSD, San Jose, CA 95193 USA. RP Anders, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Raoux, Simone/G-3920-2016 NR 20 TC 55 Z9 55 U1 0 U2 10 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD OCT PY 1997 VL 94-5 IS 1-3 BP 189 EP 194 DI 10.1016/S0257-8972(97)00346-0 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA YL682 UT WOS:000070981000033 ER PT J AU Monteiro, OR Delplancke-Ogletree, MP Lo, RY Winand, R Brown, I AF Monteiro, OR Delplancke-Ogletree, MP Lo, RY Winand, R Brown, I TI Synthesis and characterization of thin films of WCx, produced by mixing W and C plasma streams SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 24th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 97) CY APR 21-25, 1997 CL SAN DIEGO, CALIFORNIA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE metal plasma; plasma immersion; diamondlike; tungsten carbide ID DIAMOND-LIKE CARBON; STRUCTURAL-CHANGES; H FILMS; DEPOSITION; COATINGS AB WCx coatings have been synthesized by filtered cathodic are deposition at room temperature. Repetitively pulsed W and C plasma streams were mixed, and the duration of the pulse of each stream was used to vary the film composition. The energy of the incident ions was controlled by applying a pulsed bias voltage at the substrate, and was used for enhancing the adhesion as well as for modifying the microstructure of the film. The films with low W content (less than 20 at.%) consisted of regions of amorphous WC dispersed in an amorphous carbon matrix, At higher Ur content, nano-crystalline WC was observed. internal stresses in the as deposited films ranged between 500 and 4500 MPa, depending on the W content and the applied bias voltage. Film hardness varied between 63 GPa and 30 GPa, and strongly depended uh the W content and also on the applied bias voltage. (C) 1997 Elsevier Science S.A. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Free Univ Brussels, Dept Met & Electrochem, B-1050 Brussels, Belgium. Univ Calif Berkeley, Comp Mech Lab, Berkeley, CA 94720 USA. RP Monteiro, OR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 16 TC 32 Z9 33 U1 1 U2 4 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD OCT PY 1997 VL 94-5 IS 1-3 BP 220 EP 225 DI 10.1016/S0257-8972(97)00453-2 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA YL682 UT WOS:000070981000038 ER PT J AU Liu, Y Erdemir, A Meletis, EI AF Liu, Y Erdemir, A Meletis, EI TI Influence of environmental parameters on the frictional behavior of DLC coatings SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 24th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 97) CY APR 21-25, 1997 CL SAN DIEGO, CA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE diamond-like coatings; wear; friction; graphitization ID DIAMOND-LIKE CARBON; CHEMICAL VAPOR-DEPOSITION; AMORPHOUS-CARBON; FILMS; WEAR; MICROSTRUCTURE AB It was shown in our previous studies that diamond-like carbon (DLC) films possess low friction coefficient (f) and excellent wear resistance. The reduction in f was found to be consistent with a 'wear-induced graphitization' mechanism of the DLC structure proposed recently by Liu and Meletis (J. Mater. Sci., 32 (1997) 3491). A recent study showed that operational parameters (sliding velocity and loading level) influence the tribological behavior of DLC film through control of the kinetics of the graphitization process. The objective of the present study was to investigate the influence of environmental parameters (humidity and temperature) on the tribological behavior of DLC film and test the wear-induced graphitization mechanism. Ion-beam deposition was utilized to deposit DLC on a SiC substrate. Pin-on-disk experiments were conducted by varying humidity (0%, 40% and 100%) and temperature (-10 degrees C and 25 degrees C). As-deposited DLC and wear debris was characterized by transmission electron microscopy. It was found that lower humidity increases the graphitization rate more than likely due to the reduction in the effect by the water molecules. A decreased graphitization rate was observed at lower temperature and higher humidity, and can be attributed to suppression of temperature rise at 'hot spots'. The present findings are consistent and further support the wear-induced graphitization mechanism. (C) 1997 Elsevier Science S.A. C1 Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA. Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. RP Meletis, EI (reprint author), Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA. EM meletis@me.lsu.edu NR 25 TC 120 Z9 130 U1 3 U2 20 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD OCT PY 1997 VL 94-5 IS 1-3 BP 463 EP 468 DI 10.1016/S0257-8972(97)00450-7 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA YL682 UT WOS:000070981000080 ER PT J AU Erdemir, A Fenske, GR Terry, J Wilbur, P AF Erdemir, A Fenske, GR Terry, J Wilbur, P TI Effect of source gas and deposition method on friction and wear performance of diamondlike carbon films SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 24th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 97) CY APR 21-25, 1997 CL SAN DIEGO, CA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE diamondlike carbon; friction; wear; hydrogen-rich plasma; ion-beam deposition; Rf sputtering ID TRIBOLOGICAL PROPERTIES; AMORPHOUS-CARBON; ENVIRONMENT; BEHAVIOR AB We investigated the tribological performance of diamondlike carbon (DLC) films derived from methane, acetylene, and hydrogen + methane source gases in a magnetron sputtering system and an ion-beam-deposition system. Films have been deposited on AISI 440C bearing-steel substrates and were tested in a pin-on-disk machine under a wide range of conditions in open air and in dry nitrogen. We found that the films grown in a hydrogen + methane plasma resulted in significantly lower friction coefficients (i.e. 0.01) and ball wear rates during tests in dry nitrogen (N(2)). The friction coefficients for the methane-derived films were also low (0.02 in dry N(2)) but the friction coefficients of the acetylene-produced films were 2- to 10-times higher than those recorded for the methane-and hydrogen + methane-grown films, especially in dry N(2). The methane- and hydrogen + methane-grown films also resulted in very small wear losses on counter-face balls, regardless of the test environments. Raman spectroscopy and electron microscopy were used to elucidate the structural chemistry of each film and correlate the findings with tribological performance. (C) 1997 Elsevier Science S.A. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Univ Wisconsin, Dept Mat Sci, Madison, WI 53706 USA. Colorado State Univ, Dept Mech Engn, Ft Collins, CO 80523 USA. RP Erdemir, A (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. EM aerdemir@qmgate.anl.gov NR 22 TC 56 Z9 58 U1 2 U2 12 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD OCT PY 1997 VL 94-5 IS 1-3 BP 525 EP 530 DI 10.1016/S0257-8972(97)00461-1 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA YL682 UT WOS:000070981000090 ER PT J AU Erdemir, A Halter, M Fenske, GR Krauss, A Gruen, DM Pimenov, SM Konov, VI AF Erdemir, A Halter, M Fenske, GR Krauss, A Gruen, DM Pimenov, SM Konov, VI TI Durability and tribological performance of smooth diamond films produced by Ar-C-60 microwave plasmas and by laser polishing SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 24th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 97) CY APR 21-25, 1997 CL SAN DIEGO, CALIFORNIA SP Amer Vacuum Soc, Vacuum Met & Thin Films Div DE nanocrystalline diamond; laser polishing; friction; wear ID CVD DIAMOND; FRICTION; GROWTH; PRECURSORS; COATINGS; WEAR AB In this study, we explored and compared the friction and wear performance of smooth (30 nm, root mean square) and nanocrystalline diamond films (average grain size approximate to 15 nm) grown in an Ar-C-60 microwave plasma with the friction and wear performance of laser-polished microcrystalline diamond films (grain size approximate to 20-50 mu m) grown in a conventional CH4-H-2 microwave plasma. Tribological tests were run under 2-N load in open air (30-50% relative humidity) and in dry N-2. The frictional performances of both the as-grown smooth and laser polished diamond films were comparable. They both afforded very low friction coefficients (0.06-0.15) and low wear rates (2-6 x 10(-7) mm(3)/N.m) to counterface Si3N4 balls. We used Raman spectroscopy, electron microscopy, and atomic force microscopy to ascertain the structural, chemical, and surface topographical characteristics of the films and correlated the results with the friction and wear mechanisms of diamond films in open air and dry N-2. (C) 1997 Elsevier Science S.A. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia. RP Erdemir, A (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Halter, Michael/F-9795-2011 NR 25 TC 51 Z9 54 U1 2 U2 11 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0257-8972 J9 SURF COAT TECH JI Surf. Coat. Technol. PD OCT PY 1997 VL 94-5 IS 1-3 BP 537 EP 542 DI 10.1016/S0257-8972(97)00496-9 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA YL682 UT WOS:000070981000092 ER PT J AU Van Hove, MA Hermann, K Watson, PR AF Van Hove, MA Hermann, K Watson, PR TI The surface structure database: SSD SO SURFACE REVIEW AND LETTERS LA English DT Article; Proceedings Paper CT 5th International Conference on the Structure of Surfaces (ICSOS-5) CY JUL 08-12, 1996 CL UNIV AIX MARSEILLE, AIX PROVENCE, FRANCE HO UNIV AIX MARSEILLE AB The second version of SSD (Surface Structure Database) appeared in 1996, updating its first version, published in 1993. SSD-2 includes nearly 1000 structure analyses (an increase of 64%) published through mid-1995, as well as numerous software extensions and improvements. SSD is an interactive PC-based database of experimentally determined surface structures. For maximum reliability and usefulness, the structures are critically selected to be completely solved, by established techniques. The database includes extensive information not only about atomic positions, bond lengths and angles, but also about experimental preparation, measurement and analysis methods. The main features of SSD include an advanced search and display system, as well as interactive 3D color visualization and analysis tools of great flexibility. It is also possible to generate publication-ready color or gray-scale prints of any structure. A printed version of SSD-1, called "Atlas of Surface Structures," is available and also described here. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Fritz Haber Inst, Abt Theorie, D-14195 Berlin, Germany. Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA. RP Van Hove, MA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RI Van Hove, Michel/A-9862-2008 OI Van Hove, Michel/0000-0002-8898-6921 NR 5 TC 4 Z9 4 U1 0 U2 2 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0218-625X J9 SURF REV LETT JI Surf. Rev. Lett. PD OCT PY 1997 VL 4 IS 5 BP 1071 EP 1075 DI 10.1142/S0218625X97001322 PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA YL958 UT WOS:000071012500053 ER PT J AU Swartzentruber, BS AF Swartzentruber, BS TI Atomic-scale dynamics of atoms and dimers on the Si(001) surface SO SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 10th TOYOTA Conference on Atomic Molecular and Electronic Dynamic Processes on Solid Surfaces CY NOV 05-08, 1996 CL SHIZUOKA, JAPAN SP Toyota DE clusters; diffusion and migration; scanning tunneling microscopy; silicon; surface defects; surface diffusion ID SCANNING-TUNNELING-MICROSCOPY; SI AD-DIMERS; VARIABLE-TEMPERATURE STM; SI(100) SURFACE; DIFFUSION-BARRIERS; VICINAL SI(001); SINGLE-LAYER; STEPS; BINDING; GROWTH AB The kinetics of adsorbed Si monomers and dimers, at submonolayer coverage, are measured using scanning tunneling microscopy (STM). Si monomers are observed in empty-state STM images acquired between room temperature and 115 degrees C. The monomers are trapped at the ends of rebonded-SB type dimer rows. When monomers thermally escape from the traps, they rapidly diffuse along the substrate dimer row until they find another unoccupied trap or return to their original trap. The binding activation barrier at isolated traps is similar to 1.0 eV. A slightly lower barrier exists for monomers to hop between the ends of neighboring dimer rows - a process facilitating diffusion along segments of SE type steps. In addition to monomers, the interactions of adsorbed Si dimers with steps and islands on Si(001) are quantified using atom tracking STM. Diffusing dimers are reflected from steps, sides of islands, and certain surface defect structures. Site-specific free energies are extracted from measurements of lattice-site occupation probabilities of dimers trapped between these reflecting barriers. Relative to the free energy of isolated dimers on a terrace, dimers located at the first lattice site next to SA steps and the sides of islands are bound by similar to 0.03-0.06 eV. The binding decreases to half that at the second lattice site, and is indistinguishable from the free-terrace value at a distance of three or more lattice sites. (C) 1997 Elsevier Science B.V. RP Swartzentruber, BS (reprint author), SANDIA NATL LABS, POB 5800, ALBUQUERQUE, NM 87185 USA. NR 36 TC 14 Z9 14 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD OCT PY 1997 VL 386 IS 1-3 BP 195 EP 206 DI 10.1016/S0039-6028(97)00298-7 PG 12 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA YA925 UT WOS:A1997YA92500024 ER PT J AU Atchity, GJ Ruedenberg, K AF Atchity, GJ Ruedenberg, K TI Determination of diabatic states through enforcement of configurational uniformity SO THEORETICAL CHEMISTRY ACCOUNTS LA English DT Article DE diabatic states; potential energy surfaces; avoided crossings; conical intersections; diabatization adapted orbitals; configuration interaction ID POTENTIAL-ENERGY SURFACES; BLOCK DIAGONALIZATION; CONICAL INTERSECTION; WAVE-FUNCTIONS; ABINITIO; OZONE; ORBITALS; CONSTRUCTION; DEFINITION; MATRICES AB An electronic structure-based construction of diabatic states from adiabatic states is formulated that is applicable when individual diabatic states contain several dominant configurations. It is accomplished by maximizing the electronic uniformity of the diabatic states with respect to their dominant configurations throughout the entire nuclear coordinate region. The configurations are generated from unambiguously defined diabatization-adapted molecular orbitals. The orthogonal transformation from adiabatic to diabatic states is deduced by an intrinsic analysis of the adiabatic CI coefficients, without calculating matrix elements of additional, derivative or non-derivative operators. The practicality of the method is demonstrated by applying it to the conical intersection region of the 1(1)A(1) and 2(1)A(1) states of ozone. C1 US DOE, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. NR 43 TC 84 Z9 84 U1 0 U2 15 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1432-881X EI 1432-2234 J9 THEOR CHEM ACC JI Theor. Chem. Acc. PD OCT PY 1997 VL 97 IS 1-4 BP 47 EP 58 DI 10.1007/s002140050236 PG 12 WC Chemistry, Physical SC Chemistry GA YC025 UT WOS:A1997YC02500005 ER PT J AU Piqueras, MC Rohlfing, CM AF Piqueras, MC Rohlfing, CM TI An ab initio analysis of the electronic structure and harmonic frequencies of nickel porphyrin SO THEORETICAL CHEMISTRY ACCOUNTS LA English DT Article DE electronic structure; harmonic frequencies; nickel porphyrin ID FORCE-FIELD; VIBRATIONAL ASSIGNMENT; INFRARED-SPECTRA; RESONANCE RAMAN; PORPHINE; PREDICTION; STATE AB Ab initio calculations are performed to understand the geometry, electronic structure, and vibrational frequencies of nickel porphyrin (NIP). Hartree-Fock (HF) and second-order perturbation (MP2) theories are applied with polarized basis sets. The calculated geometrical parameters are in very good agreement with the crystal structure determination. The electronic structure and bonding are analyzed in terms of complexation and correlation effects. Not unexpectedly, the HF depiction of the metal-porphyrin interaction is rather ionic while ligand sigma donation is dominant at the MP2 level. Scaled HF frequencies of NIP and its isotopomers are in very good agreement with observed infrared and resonance Raman data. RP Piqueras, MC (reprint author), SANDIA NATL LABS,CUMBUST CHEM DEPT,LIVERMORE,CA 94551, USA. NR 18 TC 10 Z9 10 U1 1 U2 4 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 1432-881X J9 THEOR CHEM ACC JI Theor. Chem. Acc. PD OCT PY 1997 VL 97 IS 1-4 BP 81 EP 87 DI 10.1007/s002140050240 PG 7 WC Chemistry, Physical SC Chemistry GA YC025 UT WOS:A1997YC02500009 ER PT J AU Kendall, RA Fruchtl, HA AF Kendall, RA Fruchtl, HA TI The impact of the resolution of the identity approximate integral method on modern ab initio algorithm development SO THEORETICAL CHEMISTRY ACCOUNTS LA English DT Article DE resolution; identity; ab initio algorithm; integral ID PARALLEL DIRECT-SCF; GAUSSIAN-BASIS SETS; RECURRENCE RELATIONS; REPULSION INTEGRALS; MOLECULES; COMPUTERS; COMPUTATION; DERIVATIVES; BORON; NEON AB The computation of the two-electron four-center integrals over gaussian basis functions is a significant component of the overall work of many ab initio methods used today, Improvements in the computational efficiency of the base algorithms have provided significant impact, Somewhat overlooked are methods that provide approximations to these integrals and their implementation in application software. A partial review of approximate integral techniques focused on the resolution of the identity (RI) four-center, two-electron integral approximation is given. The past and current uses of the RI algorithms are presented along with possibilities for further exploitation of the technology. RP Kendall, RA (reprint author), PACIFIC NW LAB, THEORY MODELING & SIMULAT PROGRAM, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 57 TC 190 Z9 193 U1 1 U2 20 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1432-881X EI 1432-2234 J9 THEOR CHEM ACC JI Theor. Chem. Acc. PD OCT PY 1997 VL 97 IS 1-4 BP 158 EP 163 DI 10.1007/s002140050249 PG 6 WC Chemistry, Physical SC Chemistry GA YC025 UT WOS:A1997YC02500018 ER PT J AU Peterson, KA Wilson, AK Woon, DE Dunning, TH AF Peterson, KA Wilson, AK Woon, DE Dunning, TH TI Benchmark calculations with correlated molecular wave functions .12. Core correlation effects on the homonuclear diatomic molecules B-2-F-2 SO THEORETICAL CHEMISTRY ACCOUNTS LA English DT Article DE molecular wave functions; core correlation effects; homonuclear diatomic molecules ID CONFIGURATION-INTERACTION CALCULATIONS; GAUSSIAN-BASIS SETS; DISSOCIATION-ENERGY; 1S CORRELATION; ATOMS; 1ST-ROW; N-2; HYDRIDES; OMEGA(E); BORON AB Using systematic sequences of the newly developed correlation consistent core-valence basis sets from cc-pCVDZ through cc-pCV6Z, the spectroscopic constants of the homonuclear diatomic molecules containing first row atoms, B-F, are calculated both with and without inclusion of 1s correlation. Internally contracted multireference configuration interaction (IC-MRCI) and singles and doubles coupled cluster (CCSD) theory with a perturbational estimate of connected triple excitations, CCSD(T), have been investigated. By exploiting the convergence of the correlation consistent basis sets, complete basis set (CBS) limits have been estimated for total energies, dissociation energies, equilibrium geometries, and harmonic frequencies, Based on the estimated CBS limits the effects of 1s correlation on D-e (kcal/mol), r(e) (Angstrom), and omega(e) (cm(-1)) are: +1.1, -0.0070, +10 for B-2; +1.5, -0.0040, +13 for C-2; +0.9, -0.0020, +9 for N-2; +0.3, -0.0020, +6 for O-2; and -0.1, -0.0015, +1 for F-2. C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. RP Peterson, KA (reprint author), WASHINGTON STATE UNIV,DEPT CHEM,POB 999,RICHLAND,WA 99352, USA. NR 44 TC 111 Z9 111 U1 0 U2 7 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 1432-881X J9 THEOR CHEM ACC JI Theor. Chem. Acc. PD OCT PY 1997 VL 97 IS 1-4 BP 251 EP 259 DI 10.1007/s002140050259 PG 9 WC Chemistry, Physical SC Chemistry GA YC025 UT WOS:A1997YC02500028 ER PT J AU GonzalezLeon, A Schultz, IR Xu, GH Bull, RJ AF GonzalezLeon, A Schultz, IR Xu, GH Bull, RJ TI Pharmacokinetics and metabolism of dichloroacetate in the F344 rat after prior administration in drinking water SO TOXICOLOGY AND APPLIED PHARMACOLOGY LA English DT Article ID B6C3F1 MICE; SPECIES-DIFFERENCES; MOUSE-LIVER; ACID; TRICHLOROETHYLENE; TRICHLOROACETATE; CARCINOGENICITY; GLYOXYLATE; REDUCTION AB The effect of prior administration of dichloroacetate (DCA) in drinking water on the pharmacokinetics of DCA in male F344 rats was studied. Rats were provided with DCA in their drinking water at 0.2 and 2.0 g/liter for 14 days and then challenged with iv bolus iv or gavage doses of [Cl-14(1,2)]DCA, 16 hr after pretreatment withdrawal. The blood concentration-time profiles of DCA and the disposition of C-14 was characterized and compared with controls. The effect of pretreatment on the in vitro metabolism of DCA in hepatic cytosol was also evaluated. Pretreatment caused a significant increase in the blood concentration and AUC(0-->infinity) of DCA (433.3 versus 2406 mu g ml(-1) hr). Pharmacokinetic analysis indicated that pretreatment significantly decreased total body clearance (267.4 versus 42.7 mi hr(-1) kg(-1)), which was largely due to decreased metabolism since only modest differences in the urinary clearance of DCA were observed. Pretreatment significantly decreased the formation of (CO2)-C-14 after both iv and oral doses of [C-14]DCA. The decrease in CO2 formation was also observed after pretreatment with DCA at 0.2 g/liter. Pretreatment also increased the urinary elimination of DCA and several metabolites, particularly glycolate. The in vitro experiments demonstrated that DCA pretreatment inhibited the conversion of DCA to glyoxylate, oxalate, and glycolate in hepatic cytosol. These results indicate that DCA has an auto-inhibitory effect on its metabolism and that pharmacokinetic studies using single doses in naive rats will underestimate the concentration of DCA at the target tissue during chronic or repeated exposures. (C) 1997 Academic Press. C1 PACIFIC NW LAB, MOL BIOSCI DEPT, RICHLAND, WA 99352 USA. RP GonzalezLeon, A (reprint author), WASHINGTON STATE UNIV, PHARMACOL TOXICOL GRAD PROGRAM, PULLMAN, WA 99164 USA. NR 34 TC 32 Z9 32 U1 0 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0041-008X J9 TOXICOL APPL PHARM JI Toxicol. Appl. Pharmacol. PD OCT PY 1997 VL 146 IS 2 BP 189 EP 195 DI 10.1006/taap.1997.8232 PG 7 WC Pharmacology & Pharmacy; Toxicology SC Pharmacology & Pharmacy; Toxicology GA YD923 UT WOS:A1997YD92300003 PM 9344886 ER PT J AU Mangel, WF Toledo, DL Ding, JZ Sweet, RM McGrath, WJ AF Mangel, WF Toledo, DL Ding, JZ Sweet, RM McGrath, WJ TI Temporal and spatial control of the adenovirus proteinase by both a peptide and the viral DNA SO TRENDS IN BIOCHEMICAL SCIENCES LA English DT Review ID HUMAN CYTOMEGALOVIRUS PROTEASE; CRYSTAL-STRUCTURE; 11-AMINO-ACID COFACTOR; CYSTEINE PEPTIDASES; SERINE PROTEINASES; VIRUS ENTRY; FOLD; SUBSTRATE; BINDING; TYPE-2 AB The adenovirus proteinase (AVP) uses both an Il-amino acid peptide (pVlC)(1,2) and the viral DNA(1) as cofactors to increase its catalytic rate constant 6000-fold. The crystal structure(3) of an AVP-pVlc complex at 2.6-Angstrom resolution reveals a new protein fold of an enzyme that is the first member of a new class of cysteine proteinases, which arose via convergent evolution. RP Mangel, WF (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. FU NIAID NIH HHS [AI41599] NR 48 TC 23 Z9 23 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0968-0004 J9 TRENDS BIOCHEM SCI JI Trends Biochem.Sci. PD OCT PY 1997 VL 22 IS 10 BP 393 EP 398 DI 10.1016/S0968-0004(97)01123-7 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA YC858 UT WOS:A1997YC85800007 PM 9357315 ER PT J AU Lupas, A Flanagan, JM Tamura, T Baumeister, W AF Lupas, A Flanagan, JM Tamura, T Baumeister, W TI Self-compartmentalizing proteases SO TRENDS IN BIOCHEMICAL SCIENCES LA English DT Review ID ESCHERICHIA-COLI; SACCHAROMYCES-CEREVISIAE; CRYSTAL-STRUCTURE; 20S PROTEASOME; THERMOPLASMA-ACIDOPHILUM; MOLECULAR CHAPERONE; PROTEIN-DEGRADATION; PROTEOLYTIC SYSTEM; TRICORN PROTEASE; COMPLEX AB Among the hundreds of proteases characterized so far, most of which are monomeric or dimeric, there is a small group that form compartments through self-association and that segregate their proteolytic active sites to the interior of these compartments, Although few in number, they represent the main agents of intracellular protein breakdown. They belong to different hydrolase families but have converged towards the same barrel-shaped architecture. Frequently, they are coupled to chaperone-like ATPases of similar quaternary structure that regulate the access to the proteolytic compartments and appear to have been recruited from the same branch of P-loop NTPases. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. MAX PLANCK INST BIOCHEM,ABT MOL STRUKTURBIOL,D-82152 MARTINSRIED,GERMANY. RP Lupas, A (reprint author), SMITHKLINE BEECHAM PHARMACEUT,1250 S COLLEGEVILLE RD,COLLEGEVILLE,PA 19426, USA. NR 58 TC 175 Z9 179 U1 0 U2 4 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0968-0004 J9 TRENDS BIOCHEM SCI JI Trends Biochem.Sci. PD OCT PY 1997 VL 22 IS 10 BP 399 EP 404 DI 10.1016/S0968-0004(97)01117-1 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA YC858 UT WOS:A1997YC85800008 PM 9357316 ER PT J AU Erdemir, A Halter, M Fenske, GR Zuiker, C Csencsits, R Krauss, AR Gruen, DM AF Erdemir, A Halter, M Fenske, GR Zuiker, C Csencsits, R Krauss, AR Gruen, DM TI Friction and wear mechanisms of smooth diamond films during sliding in air and dry nitrogen SO TRIBOLOGY TRANSACTIONS LA English DT Article; Proceedings Paper CT 52nd Annual Meeting of the Society-of-Tribologists-and-Lubrication-Engineers CY MAY 18-22, 1997 CL KANSAS CITY, MO SP Soc Tribologists & Lubricat Engineers DE friction; wear; diamond; surface films and coatings ID CHEMICAL-VAPOR-DEPOSITION; CARBON-FILMS; RAMAN-SCATTERING; THIN-FILMS; TRIBOLOGICAL CHARACTERISTICS; SURFACE; PLASMAS; GROWTH; SPECTROSCOPY; COATINGS AB Under the influence of extreme contact pressure and high frictional heating, the real contact areas of diamond films may undergo phase transformation and gradual wear during long-duration dy sliding contacts. The wear debris particles that accumulate at the contact interface can then dominate the long-term sliding friction and wear performance of these films. In this study, employing a combination of transmission electron microscopy, electron diffraction, Raman spectroscopy, and electron energy loss spectroscopy, the authors explored the structural chemistry of the diamond debris particles and the sliding contact interfaces of smooth diamond films (surface roughness: 20-40 nm, root mean square (RMS)) and described their friction and wear mechanisms in open air and dry nitrogen (N-2) The results of tribological tests indicated that the friction coefficients of Si3N4 balls against smooth diamond films were 0.04 in dry N-2 but 0.1-0.15 in air. Friction fluctuated substantially in dry N-2, especially during long-duration tests. The wear rates of Si3N4 balls were by factors of 5 to 6 lower in dry N-2 than in air, but a reverse situation was observed for diamond films; their wear rates were significantly higher in dry N-2 than in air. The results of the surface and structure analytical studies have suggested that the sp(3)-bonded crystalline diamond had transformed to a sp(2)-bonded amorphous slate, but not to crystalline graphite. C1 ARGONNE NATL LAB, DIV MAT SCI, ARGONNE, IL 60439 USA. ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. RP ARGONNE NATL LAB, DIV ENERGY TECHNOL, 9700 S CASS AVE, ARGONNE, IL 60439 USA. RI Halter, Michael/F-9795-2011 NR 43 TC 47 Z9 53 U1 5 U2 12 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA SN 1040-2004 EI 1547-397X J9 TRIBOL T JI Tribol. Trans. PD OCT PY 1997 VL 40 IS 4 BP 667 EP 675 DI 10.1080/10402009708983707 PG 9 WC Engineering, Mechanical SC Engineering GA YE971 UT WOS:A1997YE97100017 ER PT J AU Swaminathan, S Altynov, S Jones, IP Zaluzec, NJ Maher, DM Fraser, HL AF Swaminathan, S Altynov, S Jones, IP Zaluzec, NJ Maher, DM Fraser, HL TI Precise and accurate refinements of the 220 structure factor for silicon by the systematic-row CBED method SO ULTRAMICROSCOPY LA English DT Article ID BEAM ELECTRON-DIFFRACTION; ORDER STRUCTURE FACTORS; CHARGE-DENSITY; PATTERNS AB The 220 structure factor for silicon has been refined by matching rocking curves extracted from energy filtered convergent beam electron diffraction patterns to those calculated from a Bloch-wave formulation of the dynamical theory of electron diffraction. There is an excellent agreement between the refined results that are obtained from rocking curves recorded from different crystal thicknesses and published results. Purpose-written computer codes have been used to perform the fitting. Three efficient criteria for automatic beam selection have been incorporated in these computer programs to guarantee the convergence of a calculation. The importance of minimization criteria and treatment of anomalous absorption on the convergence of the calculations have been tested. It is demonstrated that the refined structure factors are independent of minimization criteria and that the computationally less intensive perturbation treatment of absorption can be used to refine a structure factor with high precision (less than 0.1%) as well as high relative accuracy. C1 OHIO STATE UNIV,DEPT MAT SCI & ENGN,COLUMBUS,OH 43210. UNIV BIRMINGHAM,SCH MET & MAT,BIRMINGHAM B15 2TT,W MIDLANDS,ENGLAND. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,RALEIGH,NC 27695. NR 36 TC 2 Z9 2 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3991 J9 ULTRAMICROSCOPY JI Ultramicroscopy PD OCT 1 PY 1997 VL 69 IS 3 BP 169 EP 183 DI 10.1016/S0304-3991(97)00045-4 PG 15 WC Microscopy SC Microscopy GA YD731 UT WOS:A1997YD73100002 ER PT J AU Gao, JW Skeen, RS Hooker, BS Quesenberry, RD AF Gao, JW Skeen, RS Hooker, BS Quesenberry, RD TI Effects of several electron donors on tetrachloroethylene dechlorination in anaerobic soil microcosms SO WATER RESEARCH LA English DT Article DE tetrachloroethylene; reductive dehalogenation; microcosm; reducing equivalent ID REDUCTIVE DECHLORINATION; AQUIFER MICROCOSMS; DEHALOSPIRILLUM MULTIVORANS; METHANOGENIC CONDITIONS; ENRICHMENT CULTURE; MIXED CULTURES; PROPIONATE; ACETATE; METHANE; STIMULATION AB Anaerobic microcosms of subsurface soils from three location were used to investigate the separate effects of several electron donors on tetrachloroethylene (PCE) dechlorination activity. The substrates tested were methanol, lactate, acetate and sucrose. Various levels of sulfate-reducing, acetogenic, fermentative, and methanogenic activity were observed in all sediments. PCE dechlorination was detected in all microcosms, but the amount of dehalogenation varied by several orders of magnitude. Trichloroethylene as the primary dehalogenation product; however, small amounts of cis-1,2-dichloroethylene, 1,1-dichloroethylene, and vinyl chloride were also detected in several microcosms. Lactate-amended microcosms showed large amounts of dehalogenation in two of the three sediments. One of the two sediments which showed positive activity with lactate also had large amounts of dehalogenation with methanol. Amendment with formate, acetate, or sucrose resulted in only slight dehalogenation in the three sediments. Elevated levels of dehalogenation were not consistently associated with any observable anaerobic metabolisms (sulfate reduction, acetogenesis, fermentation, or methanogensis). (C) 1997 Elsevier Science Ltd. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 29 TC 25 Z9 28 U1 1 U2 9 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0043-1354 J9 WATER RES JI Water Res. PD OCT PY 1997 VL 31 IS 10 BP 2479 EP 2486 DI 10.1016/S0043-1354(97)00108-5 PG 8 WC Engineering, Environmental; Environmental Sciences; Water Resources SC Engineering; Environmental Sciences & Ecology; Water Resources GA XZ554 UT WOS:A1997XZ55400011 ER PT J AU Birkholzer, J Tsang, CF AF Birkholzer, J Tsang, CF TI Solute channeling in unsaturated heterogeneous porous media SO WATER RESOURCES RESEARCH LA English DT Article ID STOCHASTIC-ANALYSIS; HYDRAULIC CONDUCTIVITY; STRATIFIED SOILS; SINGLE FRACTURE; FIELD SOIL; FLOW; TRANSPORT; WATER; MODEL; DISPERSION AB Numerical simulations have been performed to study flow and solute transport phenomena in strongly heterogeneous, variably saturated porous media. Different saturation scenarios were applied varying from fully saturated to highly unsaturated conditions, corresponding to different infiltration rates into the soil. It was found that the solute travels along preferred flow paths, which may be called channels. The degree of channeling, the location of channels, and the hydraulic properties along channels are a function of the mean saturation in the flow domain. Strong channeling effects were obtained in both fully saturated and in low-saturation cases. At intermediate saturation values, channeling effects are less significant, and the system exhibits a more homogeneous flow pattern. The dispersion of solutes as shown in the calculated tracer breakthrough curves essentially reflects the degree of channeling and thus is saturation dependent; in cases when flow channeling is less evident we observe much smaller dispersion than in cases with strong channeling. The hydraulic properties of the channels appeared to be an invariant of the actual location and geometry, indicating that they may be an intrinsic characteristic of the soil heterogeneity and the water saturation. RP Birkholzer, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Birkholzer, Jens/C-6783-2011 OI Birkholzer, Jens/0000-0002-7989-1912 NR 50 TC 56 Z9 57 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD OCT PY 1997 VL 33 IS 10 BP 2221 EP 2238 DI 10.1029/97WR01209 PG 18 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA XY632 UT WOS:A1997XY63200002 ER PT J AU Wilcox, BP Newman, BD Brandes, D Davenport, DW Reid, K AF Wilcox, BP Newman, BD Brandes, D Davenport, DW Reid, K TI Runoff from a semiarid ponderosa pine hillslope in New Mexico SO WATER RESOURCES RESEARCH LA English DT Article ID SUBSURFACE FLOW; OVERLAND-FLOW; SURFACE RUNOFF; WATER-FLOW; ARIZONA; FIELD; SOIL; INFILTRATION; VARIABILITY; MACROPORES AB The mechanisms by which runoff is generated in semiarid forests have been little studied. Over the past 4 years we have been investigating runoff processes in semiarid regions by continuously monitoring runoff, both surface and lateral subsurface, from an 870-m(2) ponderosa pine hillslope in northern New Mexico. We have found that runoff accounts for between 3 and 11% of the annual water budget. We have also found that lateral subsurface flow is a major mechanism of runoff generation, especially following periods of above-average fall and winter precipitation. In one winter, lateral subsurface flow was equivalent to about 20% of the snowpack (about 50 mm). When antecedent soil moisture was high, lateral subsurface flow was extremely responsive to snowmelt and rainfall events and was much more dynamic than would be suggested by the low (laboratory determined) hydraulic conductivity of the soil. The rapidity with which lateral subsurface flow follows these events suggests that macropore how is occurring. In the case of surface runoff, the major generation mechanisms are intense summer thunderstorms, prolonged-frontal storms, and snowmelt over frozen soils. Surface runoff at our site took the form of infiitration-excess overland flow; this type of surface runoff has not been found to dominate at other ponderosa pine sites studied. These detailed and continuous investigations are increasing our understanding of runoff processes in semiarid forests and are thereby laying the groundwork for improved predictions, not only of runoff, but also of the concomitant transport of sediment and contaminants within and from these zones. C1 LOS ALAMOS NATL LAB,ENVIRONM SCI GRP,EES15,MS J495,LOS ALAMOS,NM 87545. RP Wilcox, BP (reprint author), INTER AMER INST GLOBAL CHANGE STUDIES,AVE ASTRONAUTAS 1758,BR-12227010 S JOSE CAMPOS,SAO PAULO,BRAZIL. NR 51 TC 70 Z9 70 U1 0 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD OCT PY 1997 VL 33 IS 10 BP 2301 EP 2314 DI 10.1029/97WR01691 PG 14 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA XY632 UT WOS:A1997XY63200008 ER PT J AU Liao, TW Li, K McSpadden, SB ORourke, LJ AF Liao, TW Li, K McSpadden, SB ORourke, LJ TI Wear of diamond wheels in creep-feed grinding of ceramic materials .1. Mechanisms SO WEAR LA English DT Article DE diamond wheel; wear mechanism; creep feed grinding; advanced ceramics AB The main objective of this paper is to study and quantify the wheel wear mechanisms in creep-feed grinding of ceramic materials with diamond wheels. A resin-bonded diamond wheel was selected for this study. Nine different states of wheel working surface were generated by grinding specified volumes of a selected silicon nitride material. It is found that: (1) the roughness of wheel profile decreased quickly and stayed about the same after approximately 30 cm(3) volume of material removal; (2) diamond grits experienced attritious wear, grit fracture, and grit dislodgment; (3) the wheel wear mechanism was dominated by grit dislodgment in the first 1 cm(3) volume of material removal and by attritious wear thereafter; (4) grit density per unit area can be expressed as an exponential decay function of cumulative volume removal. The percentage of each wear mechanism was obtained by tracing grits in the same area after 2.1, 4.2, 7.4, and 10.6 cm(3) volume of material removal using the lead-tape imprint technique. (C) 1997 Elsevier Science S.A. C1 OAK RIDGE NATL LAB,HIGH TEMP MAT LAB,OAK RIDGE,TN 37831. RP Liao, TW (reprint author), LOUISIANA STATE UNIV,DEPT IND & MFG SYST ENGN,BATON ROUGE,LA 70803, USA. RI Liao, Thunshun/B-2724-2009 NR 13 TC 11 Z9 12 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD OCT PY 1997 VL 211 IS 1 BP 94 EP 103 DI 10.1016/S0043-1648(97)00075-6 PG 10 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA YG026 UT WOS:A1997YG02600012 ER PT J AU Li, K Liao, TW ORourke, LJ McSpadden, SB AF Li, K Liao, TW ORourke, LJ McSpadden, SB TI Wear of diamond wheels in creep-feed grinding of ceramic materials .2. Effects on process responses and strength SO WEAR LA English DT Article DE creep feed grinding; advanced ceramics; diamond wheels; effects of wheel wear ID TOUGHNESS AB Alumina specimens were ground with a resin bonded diamond wheel using three different work speeds in creep-feed up-cut mode. For each work speed, the wheel surfaces and the process responses were evaluated at five different wear states, which were generated by grinding 0, 29.6, 59.2, 88.8, and 118.4 cm(3) volume of a selected silicon nitride material. The mechanisms of wheel wear have been studied and reported in Part I (Wear 211 (1997) 94-103). This paper investigates the effects of wheel wear on process responses and ground ceramic quality, particularly the flexural strength. Strong relationships between the wheel surface conditions and the process responses are found. During the initial stage of wheel wear (from the as-dressed state to the first 29.6 cm(3) volume of material removal), the surface density of diamond grits, surface roughness and flexural strength decreased, and the specific normal force, specific tangential force, force ratio, and specific energy increased. The largest change in most of process responses, except the roughness, occurs at the lowest work speed. Right after grinding 29.6 cm(3) volume of silicon nitride material, process responses stayed approximately the same with some degree of expected fluctuation due to the competing influence of attritious wear and the wheel's self-sharpening effect. The effect of wheel wear on the flexural strength of ground alumina specimens is found to be dominated by the effect of work speed. (C) 1997 Elsevier Science S.A. C1 LOUISIANA STATE UNIV,DEPT IND & MFG SYST ENGN,BATON ROUGE,LA 70803. OAK RIDGE NATL LAB,HIGH TEMP MAT LAB,OAK RIDGE,TN 37831. RI Liao, Thunshun/B-2724-2009 NR 23 TC 16 Z9 16 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0043-1648 J9 WEAR JI Wear PD OCT PY 1997 VL 211 IS 1 BP 104 EP 112 DI 10.1016/S0043-1648(97)00110-5 PG 9 WC Engineering, Mechanical; Materials Science, Multidisciplinary SC Engineering; Materials Science GA YG026 UT WOS:A1997YG02600013 ER PT J AU Schlesier, C Schneibel, JH Wahi, RP AF Schlesier, C Schneibel, JH Wahi, RP TI Precipitation in iron aluminides containing carbon and titanium, zirconium or niobium SO ZEITSCHRIFT FUR METALLKUNDE LA English DT Article ID FEAL; TEMPERATURE; FRACTURE; ALLOYS; FLOW AB Three iron aluminide alloys with the composition Fe-40Al-0.5X-0.2C-0.05B, in at.% (X = Ti, Zr, Nb), have been investigated by means of optical, scanning and transmission electron microscopy. All three alloys were extruded and exhibited small grain sizes ranging from 12 to 40 mu m. The precipitate volume fractions and lattice parameters were consistent with the low predicted solubilities in these alloys. While the Ti- and Nb-containing alloys formed, as expected, TiC and NbC precipitates, the Zr-containing alloy contained a ternary intermetallic phase (Fe6Al6Zr). In addition, an unidentified Fe-Al-Zr phase with a Zr concentration of approximately 23 at.% as well as ZrC were found. The precipitate morphologies were also very different in the three alloys. Whereas in the Ti-containing alloy the TiC phase tended to occur in the form of needles, the precipitates were more equiaxed in the Zr-containing alloy. The NbC particles were also equiaxed and occurred either as isolated particles in the interior of the grains or as clusters at the grain boundaries. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP Schlesier, C (reprint author), HAHN MEITNER INST BERLIN GMBH,GLIENICKER STR 100,D-14109 BERLIN,GERMANY. NR 19 TC 5 Z9 5 U1 0 U2 0 PU CARL HANSER VERLAG PI MUNICH PA KOLBERGERSTRASSE 22, POSTFACH 860420, W-8163 MUNICH, GERMANY SN 0044-3093 J9 Z METALLKD JI Z. Metallk. PD OCT PY 1997 VL 88 IS 10 BP 810 EP 815 PG 6 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA YE443 UT WOS:A1997YE44300009 ER PT J AU Campiglia, AD Moreau, F Hueber, DM Vo-Dinh, T AF Campiglia, AD Moreau, F Hueber, DM Vo-Dinh, T TI Phosphorescence imaging system using an acousto-optic filter-based charge coupled device SO ANALYTICA CHIMICA ACTA LA English DT Article DE phosphorescence; imaging detection; polyaromatic hydrocarbons; acousto-optic tunable filter ID ROOM-TEMPERATURE PHOSPHORESCENCE; POLYNUCLEAR AROMATIC-HYDROCARBONS; TUNABLE FILTER; LIQUID-CHROMATOGRAPHY; PHOSPHORIMETRY; SPECTROSCOPY; SPECTROMETER; SUBSTRATE; PAPER AB We are reporting for the first time the development of an imaging spectrometer for solid surface room temperature phosphorimetry based on an acousto-optic tunable filter. A He-Cd laser was employed as the excitation source, and a cooled two-dimensional charge coupled device was used as the detector. The spectral characterization and imaging capability of the new system were evaluated with two well known phosphorescent compounds. The phosphorescence emissions of pyrene and 1,2,3,4-dibenzanthracene adsorbed on chromatography paper treated for background reduction were investigated. Thallium(I) acetate was employed as a phosphorescence enhancer. Based on the performance of the proposed instrument, several potential applications are discussed. (C) 1997 Elsevier Science B.V. C1 OAK RIDGE NATL LAB, HLTH SCI RES DIV, ADV MONITORING DEV GRP, OAK RIDGE, TN 37831 USA. NR 48 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0003-2670 EI 1873-4324 J9 ANAL CHIM ACTA JI Anal. Chim. Acta PD SEP 30 PY 1997 VL 351 IS 1-3 BP 229 EP 239 DI 10.1016/S0003-2670(97)00236-5 PG 11 WC Chemistry, Analytical SC Chemistry GA YF688 UT WOS:A1997YF68800025 ER PT J AU Prieto, MC Maki, AH Balhorn, R AF Prieto, MC Maki, AH Balhorn, R TI Analysis of DNA-protamine interactions by optical detection of magnetic resonance SO BIOCHEMISTRY LA English DT Article ID PHOTOEXCITED TRIPLET-STATES; TRYPTOPHAN RESIDUES; STACKING INTERACTIONS; ZERO-FIELD; BINDING; CHROMATIN; PROTEINS; SPERM; PHOSPHORESCENCE; SPECTROSCOPY AB Optically detected magnetic resonance (ODMR) has been used to identify the binding site of a synthetic protamine subdomain to the major groove of DNA. A 14 amino acid peptide (R(6)WGR(6)) analog of the central DNA binding domain of bull protamine was synthesized with phenylalanine replaced by tryptophan (Trp). The peptide was bound to double-stranded poly(dABrdU) and to calf thymus DNA (CT DNA) and the complexes characterized as ''wet'' solids using ODMR techniques. The appearance of the D + E transition in the slow passage ODMR and of short-lived components in the phosphorescence decay of the complex of R(6)WGR(6) with poly(dABrdU) is diagnostic of a heavy atom effect, This can only occur if the peptide binds in the major groove of poly(dABrdU). The microenvironment of Trp in the nucleoprotein complex was characterized by phosphorescence, radiative decay lifetimes, and low-temperature ODMR measurements before and after binding to DNA. Bathochromic shifts in the phosphorescence emission upon exciting to the red in CT DNA-peptide suggest that the Trp is in a polar environment, while the red-shifted position of the 0,0-band emission points to a more polarizable environment. The heavy atom effect strongly suggests a Trp location within the major groove of DNA, A partial stacking of Trp with the polarizable nucleobases and simultaneous interactions with the phosphate-guanidinium ion Fairs and/or water molecules in the major groove of DNA which might not be totally displaced upon binding of the peptide could explain this conflicting evidence. Extrapolation of results from the system studied to protamine binding in sperm chromatin strongly suggests that the predominant binding site of protamine is the major groove of DNA. C1 UNIV CALIF DAVIS, DEPT CHEM, DAVIS, CA 95616 USA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. FU NIEHS NIH HHS [ES-02662] NR 46 TC 30 Z9 32 U1 2 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD SEP 30 PY 1997 VL 36 IS 39 BP 11944 EP 11951 DI 10.1021/bi971061l PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA XY953 UT WOS:A1997XY95300046 PM 9305988 ER PT J AU Halpern, MB Obers, NA AF Halpern, MB Obers, NA TI New semiclassical non-Abelian vertex operators for chiral and nonchiral WZW theory SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article ID CONFORMAL FIELD-THEORY; QUANTUM GROUP; 2 DIMENSIONS; EXPLICIT CONSTRUCTION; MODELS; ALGEBRA; REPRESENTATIONS; BOSONIZATION; QUANTIZATION; SYMMETRY AB We supplement the discussion of Moore and Reshetikhin and others by finding new semi-classical non-Abelian vertex operators for the chiral, antichiral and nonchiral primary fields of WZW theory. These new non-Abelian vertex operators are the natural generalization of the familiar Abelian vertex operators: they involve only the representation matrices of Lie g, the currents of affine (g x g) and certain chiral and antichiral zero modes, and they reduce to the Abelian vertex operators in the limit of Abelian algebras. Using the new constructions, we also discuss semiclassical operator product expansions, braid relations and relations to the known form of she semiclassical affine-Sugawara conformal blocks. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. ECOLE POLYTECH,CTR PHYS THEOR,CNRS UPR A0014,LAB PROPRE,F-91128 PALAISEAU,FRANCE. RP Halpern, MB (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Obers, Niels/D-1377-2014 OI Obers, Niels/0000-0003-4947-8526 NR 48 TC 10 Z9 10 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-751X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD SEP 30 PY 1997 VL 12 IS 24 BP 4317 EP 4355 DI 10.1142/S0217751X97002358 PG 39 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA XW940 UT WOS:A1997XW94000003 ER PT J AU Schafer, L Cao, M Ramek, M Teppen, BJ Newton, SQ Siam, K AF Schafer, L Cao, M Ramek, M Teppen, BJ Newton, SQ Siam, K TI Conformational geometry functions: additivity and cooperative effects SO JOURNAL OF MOLECULAR STRUCTURE LA English DT Article DE additivity effects; conformational geometry functions; cooperative effects ID BACKBONE BOND DISTANCES; MOLECULAR-FORCE FIELD; AB-INITIO; FIRST PRINCIPLES; STRUCTURAL CHEMISTRY; DEPENDENT GEOMETRY; ORGANIC-SYSTEMS; ABINITIO; MECHANICS; PARAMETERS AB The conformational geometry changes associated with torsional motion about C-C single bonds are reported for some 47 basic organic molecules of the type (X,Y,Z)C-C(X',Y',Z'), and for the phi,psi space of the model dipeptides N-acetyl N'-methyl amides of glycine and alanine. All structures were determined by ab initio HF/4-21G geometry optimizations, Employing natural cubic spline parameters, a program was written for use in empirical modeling parameter development, which calculates the bond lengths and angles of the reported compounds as functions of the associated torsional angles at any point in conformational space. The additivity of the conformational geometry functions is explored and illustrates how cooperative effects emerge in complex molecules. The results are instructive for procedures in which the properties of molecular fragments are used to derive force field parameters for the empirical modeling of complex molecules, (C) 1997 Elsevier Science B.V. C1 GRAZ TECH UNIV,INST PHYS & THEORET CHEM,A-8010 GRAZ,AUSTRIA. UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,ADV ANALYT CTR ENVIRONM SCI,AIKEN,SC 29802. PITTSBURG STATE UNIV,DEPT CHEM,PITTSBURG,KS 66762. RP Schafer, L (reprint author), UNIV ARKANSAS,DEPT CHEM & BIOCHEM,FAYETTEVILLE,AR 72701, USA. NR 49 TC 7 Z9 7 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-2860 J9 J MOL STRUCT JI J. Mol. Struct. PD SEP 30 PY 1997 VL 413 SI SI BP 175 EP 204 DI 10.1016/S0022-2860(97)00023-9 PG 30 WC Chemistry, Physical SC Chemistry GA YF236 UT WOS:A1997YF23600018 ER PT J AU Barbas, JT Sigman, ME Arce, R Dabestani, R AF Barbas, JT Sigman, ME Arce, R Dabestani, R TI Spectroscopy and photochemistry of fluorene at a silica gel/air interface SO JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY LA English DT Article DE fluorene; photochemistry; silica gel; fluorenone ID POLYCYCLIC AROMATIC-HYDROCARBONS; SIO2; SURFACE; GEL; PHOTODECOMPOSITION; ACENAPHTHYLENE; ANTHRACENE; PHOTOLYSIS; MECHANISM; MOLECULES AB The emission spectroscopy of fluorene has been studied at a silica gel/air interface at surface loadings from 1.5% to 77.1% of a monolayer. Both monomer and excimer-like emissions are observed on the surface. The excimer-like emission, centered at 350 nm, arises from excitation of ground-state van der Waals pairs of fluorene molecules. Photolysis into the van der Waals dimers at room temperature does not lead to dissociation into constituent monomers; however, irradiation of fluorene monomers at a silica gel/air interface leads to production of 9-fluorenone as the only identifiable photoproduct in 72% yield. Fluorene triplet and cation radical are both observed at the silica gel/air interface by transient diffuse reflectance spectroscopy. Sensitization of singlet molecular oxygen by silica-sorbed methylene blue, in the presence of co-sorbed fluorene, does not lead to fluorene oxidation, thus suggesting that oxidation by direct photolysis does not involve an energy transfer mechanism. An electron transfer oxidation mechanism is proposed to account for the observed photochemical oxidation of fluorene at the silica gel/air interface. (C) 1997 Published by Elsevier Science S.A. C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. VALDOSTA STATE UNIV,DEPT CHEM,VALDOSTA,GA 31698. UNIV PUERTO RICO,DEPT CHEM,RIO PIEDRAS,PR 00931. NR 41 TC 26 Z9 27 U1 2 U2 14 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 1010-6030 J9 J PHOTOCH PHOTOBIO A JI J. Photochem. Photobiol. A-Chem. PD SEP 30 PY 1997 VL 109 IS 3 BP 229 EP 236 DI 10.1016/S1010-6030(97)00148-2 PG 8 WC Chemistry, Physical SC Chemistry GA XY975 UT WOS:A1997XY97500006 ER PT J AU Montepiedra, G Fedorov, VV AF Montepiedra, G Fedorov, VV TI Minimum bias designs with constraints SO JOURNAL OF STATISTICAL PLANNING AND INFERENCE LA English DT Article DE convexity; A-optimality; D-optimality; mean squared error ID POLYNOMIAL REGRESSION; OPTIMIZATION AB A new class of model-robust optimality criteria, based on the mean squared error, is introduced in this paper. The motivation is to find designs when the researcher is more concerned with controlling the variance than the bias, or vice versa. The set of criteria proposed here is also appealing from a mathematical perspective in the sense that, unlike the Box and Draper (1959, J. Amer. Statist. Assoc. 54, 622-654); criterion, they can be imbedded in the framework of convex design theory and, hence, facilitate the search for globally optimal designs. The basic idea is to minimize a convex function of the bias part of the mean squared error subject to a convex constraint on the variance part, or vice versa. Equivalence theorems are derived and examples for the linear and quadratic regression problems are provided. (C) 1997 Elsevier Science B.V. C1 BOWLING GREEN STATE UNIV, DEPT APPL STAT & OPERAT RES, BOWLING GREEN, OH 43403 USA. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. NR 19 TC 22 Z9 22 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3758 EI 1873-1171 J9 J STAT PLAN INFER JI J. Stat. Plan. Infer. PD SEP 30 PY 1997 VL 63 IS 1 BP 97 EP 111 DI 10.1016/S0378-3758(96)00199-1 PG 15 WC Statistics & Probability SC Mathematics GA YC712 UT WOS:A1997YC71200008 ER PT J AU DiMelfi, RJ AF DiMelfi, RJ TI Grain boundary sliding and its relation to ductility and fracture in fine-grained polycrystalline materials with a particular focus on gamma-TiAl SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Conference on Mechanical Properties of Interfacial Materials CY JAN 14-19, 1996 CL KONA, HI DE grain boundary sliding; fine-grained polycrystalline materials; gamma-TiAl ID DEFORMATION AB The focus of this paper is the relationship between grain boundary sliding and fracture in polycrystalline gamma-TiAl and its significance with regard to ductility as grain size approaches the nanometer scale. Deformation by a number of relevant mechanisms is modeled using a unified approach based on the classical reaction rate theory. We delineate the high ductility grain boundary sliding flow regime, which is characterized by a relatively high deformation rate and a high rate sensitivity. In general, we find that decreasing grain size enhances this deformation mode and thereby, enhances ductility. With regard to fracture, we concern ourselves here with crack nucleation at grain boundary triple junctions caused by stress concentrations resulting from sliding. This focus leaves as the key dimension of interest that of the grain size itself and allows us to unambiguously address the effects of grain size diminishment on ductility. We compare the characteristic time associated with the build up of stress concentrations by grain boundary sliding and their relaxation by a number of flow mechanisms. We find that for gamma-TiAl, intergranular crack nucleation is exacerbated as grain size is diminished from the micrometer scale to about 40 nm. However, as grain size is further reduced below 40 nm, we find that crack nucleation becomes increasingly mitigated due to the relaxation of stress concentrations by diffusional flow. The findings discussed in this paper allow us to define the flow regime for nanocrystalline gamma-TiAl, wherein both the high ductility sliding mechanism prevails and crack nucleation is mitigated. From this result one can predict the conditions for enhanced ductility in this conventionally brittle material. (C) 1997 Elsevier Science S.A. RP DiMelfi, RJ (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 20 TC 5 Z9 5 U1 2 U2 5 PU ELSEVIER SCIENCE SA LAUSANNE 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 SEP 30 PY 1997 VL 237 IS 2 BP 141 EP 149 DI 10.1016/S0921-5093(97)00123-8 PG 9 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA YB711 UT WOS:A1997YB71100002 ER PT J AU Rittner, MN Weertman, JR Eastman, JA Yoder, KB Stone, DS AF Rittner, MN Weertman, JR Eastman, JA Yoder, KB Stone, DS TI Mechanical behavior of nanocrystalline aluminum-zirconium SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Conference on Mechanical Properties of Interfacial Materials CY JAN 14-19, 1996 CL KONA, HI DE mechanical properties; deformation behavior; nanocrystalline; Al-Zr ID CU AB An investigation of the room-temperature mechanical properties and deformation behavior of nanocrystalline aluminum-zirconium has been conducted via microhardness, nanoindentation and novel tensile experiments. Nanocrystalline specimens were produced by the inert-gas condensation process with electron beam evaporation. The modulus of elasticity of nanocrystalline Al-Zr was determined to be similar to that of coarse-grained aluminum. The hardness, strength and ductility of the samples, however, were found to be strongly impacted by grain size, which is reduced at higher zirconium levels. Extremely high hardnesses were obtained for the materials (up to similar to 3 GPa), while the tensile strengths were less impressive. Some ductility in tension was exhibited by specimens with relatively large grain sizes(greater than or equal to 100 nm), although the elongation to failure dropped to less than 1% when the grains were stabilized to similar to 10 nm by zirconium additions. This behavior appears to be linked to the increasingly high stresses required to generate dislocations to prevent crack propagation and cause yielding as the grain size is reduced into the nanometer regime. At room temperature and at the strain rate employed in this study (10(-4) s(-1)), no evidence was found to suggest that an alternative, diffusional-based deformation mechanism takes over at the smallest grain sizes. (C) 1997 Elsevier Science S.A. C1 NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. UNIV WISCONSIN,MAT SCI PROGRAM,MADISON,WI 53706. UNIV WISCONSIN,DEPT MAT SCI & ENGN,MADISON,WI 53706. RI Weertman, Julia/B-7540-2009; Eastman, Jeffrey/E-4380-2011; Stone, Donald/A-7496-2016; OI Eastman, Jeff/0000-0002-0847-4265 NR 18 TC 39 Z9 39 U1 1 U2 9 PU ELSEVIER SCIENCE SA LAUSANNE 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 SEP 30 PY 1997 VL 237 IS 2 BP 185 EP 190 DI 10.1016/S0921-5093(97)00129-9 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA YB711 UT WOS:A1997YB71100008 ER PT J AU Stone, D Eastman, J AF Stone, D Eastman, J TI Conference on Mechanical Properties of Interfacial Materials, Kona, Hawaii, January 14-19, 1996 - Preface SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Editorial Material C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP Stone, D (reprint author), UNIV WISCONSIN,MADISON,WI 53706, USA. RI Eastman, Jeffrey/E-4380-2011 NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE 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 SEP 30 PY 1997 VL 237 IS 2 BP R5 EP R5 PG 1 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA YB711 UT WOS:A1997YB71100001 ER PT J AU Anderson, LE Li, AD Nehrlich, SC Hill, MH Stevens, FJ AF Anderson, LE Li, AD Nehrlich, SC Hill, MH Stevens, FJ TI The cytosolic fructose bisphosphatase of Brassica napus contains a new potential regulatory disulfide and is redox-sensitive SO PLANT SCIENCE LA English DT Article DE cytosolic fructose bisphosphatase; domain-locking disulfides; light activation; redox-sensitive cysteines; reductive activation ID CHLOROPLAST ENZYMES; FRUCTOSE-1,6-BISPHOSPHATASE; IDENTIFICATION; MODULATION; TRANSITION; PRINCIPLE; CYSTEINES; MECHANISM; PLANTS; SITE AB The deduced amino acid sequences of the Brassica napus and sugar cane (Saccharum sp.) cytosolic fructose bisphosphatases (EC 3.1.3.11) have appeared recently. When the three-dimensional structure of the Brassica napus bisphosphatase was modeled residue 92, previously identified as a potential redox-sensitive regulatory cysteine in the cytosolic enzymes from potato, sugarbeet and spinach [L.E. Anderson, et al., Planta 196 (1995) 118-124], was a serine. (Numbering according to Protein Data Bank entry 4FBP.) Instead there is a Cys at position 110, close enough to Cys-114, the second member of the potential regulatory cysteine pair in the other cytosolic fructose bisphosphatases, to suggest the possibility of disulfide bond formation and the enzyme is redox-sensitive. The sugar cane enzyme, like the other three cytosolic fructose bisphosphatases, contains Cys-92 and Cys-114. It also is redox-sensitive. Apparently a disulfide anywhere in the region of Cys-114, -92 and -110 can function in the redox-modulation of the activity of this enzyme. (C) 1997 Elsevier Science Ireland Ltd. C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. RP Anderson, LE (reprint author), UNIV ILLINOIS,DEPT BIOL SCI,845 W TAYLOR ST,CHICAGO,IL 60607, USA. NR 19 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0168-9452 J9 PLANT SCI JI Plant Sci. PD SEP 30 PY 1997 VL 128 IS 1 BP 23 EP 30 DI 10.1016/S0168-9452(97)00136-2 PG 8 WC Biochemistry & Molecular Biology; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA XV013 UT WOS:A1997XV01300003 ER PT J AU Sigl, G Schramm, DN Lee, SJ Hill, CT AF Sigl, G Schramm, DN Lee, SJ Hill, CT TI Implications of a possible clustering of highest-energy cosmic rays SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID AIR SHOWER ARRAY; MAGNETIC-FIELDS; GAMMA-RAYS; TOPOLOGICAL DEFECTS; BURSTS; SPECTRUM; ORIGIN; SEARCH; ACCELERATION; RADIATION AB Recently, a possible clustering of a subset of observed ultra-high energy cosmic rays above similar or equal to 40 EeV (4 x 10(19) eV) in pairs near the supergalactic plane was reported. We show that a confirmation of this effect would provide information on the origin and nature of these events and, in case of charged primaries, imply interesting constraints on the extragalactic magnetic field. Possible implications for the most common models of ultra-high energy cosmic ray production in the literature are discussed. C1 UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,ENRICO FERMI INST,CHICAGO,IL 60637. NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. NR 51 TC 12 Z9 12 U1 0 U2 0 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD SEP 30 PY 1997 VL 94 IS 20 BP 10501 EP 10505 DI 10.1073/pnas.94.20.10501 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XY998 UT WOS:A1997XY99800006 PM 11038576 ER PT J AU Raterron, P Bussod, GY Doukhan, N Doukhan, JC AF Raterron, P Bussod, GY Doukhan, N Doukhan, JC TI Early partial melting in the upper mantle: An AEM study of a lherzolite experimentally annealed at hypersolidus conditions SO TECTONOPHYSICS LA English DT Article DE ATEM; early partial melting; Olivine; pyroxenes; lherzolite; upper mantle; partial melting ID HIGH-TEMPERATURE DEFORMATION; X-RAY-MICROANALYSIS; DRY PERIDOTITE; MAGMA GENESIS; HIGH-PRESSURE; SAN-CARLOS; OLIVINE; DIOPSIDE; PYROXENE; CRYSTAL AB A natural spinel Iherzolite (60% olivine, 25% enstatite, 13% Cr-diopside, and 2% Cr-spinel) was annealed and deformed at 1 CPa and 900-1000 degrees C in H2O-saturated conditions and at f(o2) roughly corresponding to the fayalite-magnetite-quartz buffer. The topology and textural development of the glass (i.e. quenched melt) was investigated by analytical transmission electron microscopy. In addition to the large glass slots (>10 mu m) previously observed using scanning electron microscopy (Bussed, G.Y. and Christie, J.M., 1991, Textural development and melt topology in spinel Iherzolite experimentally deformed at hypersolidus conditions, J. Petrol., special Iherzolite issue, pp. 17-39), we detected intracrystalline glass droplets of 0.1-0.2 mu m within pyroxenes and olivine grains and intergranular isolated glass pockets 1 to 3 mu m wide at grain boundaries. X-ray microanalysis shows that the intracrystalline glass droplets are highly enriched in silica (approximate to 70 wt% SiO2), and depleted in MgO. Their shape and composition are similar in both pyroxenes and olivine grains. These droplets are characteristic of the phenomenon of early partial melting (EPM) previously observed in pyroxenes. The intergranular pockets are also SiO2-rich (54 to 66 wt%); their Mg content increases with the size of the pocket (from 0 to 7.6 wt% MgO). These observations provide a plausible scenario for the very first stage of melt formation in the upper mantle. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP Raterron, P (reprint author), UNIV LILLE,LAB STRUCT & PROPRIETES ETAT SOLIDE,CNRS 234,F-59655 VILLENEUVE DASCQ,FRANCE. RI Raterron, Paul/C-5594-2013 NR 34 TC 10 Z9 10 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0040-1951 J9 TECTONOPHYSICS JI Tectonophysics PD SEP 30 PY 1997 VL 279 IS 1-4 BP 79 EP 91 DI 10.1016/S0040-1951(97)00131-5 PG 13 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA YE559 UT WOS:A1997YE55900007 ER PT J AU Gao, C Wei, T Duewer, F Lu, YL Xiang, XD AF Gao, C Wei, T Duewer, F Lu, YL Xiang, XD TI High spatial resolution quantitative microwave impedance microscopy by a scanning tip microwave near-field microscope SO APPLIED PHYSICS LETTERS LA English DT Article AB A recently developed scanning tip microwave near-field microscope has been improved to achieve a spatial resolution of 100 nm (similar to lambda/10(6)). Furthermore, explicit calculations of the field distribution using a simplified model allow quantitative microscopy of dielectric properties for dielectric materials. A detection sensitivity of delta epsilon/epsilon similar to 6x10(-4) has been achieved. (C) 1997 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RI Xiang, Xiaodong/A-9445-2012; Xiang, Xiaodong/A-5936-2017 NR 6 TC 147 Z9 152 U1 3 U2 23 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 29 PY 1997 VL 71 IS 13 BP 1872 EP 1874 DI 10.1063/1.120444 PG 3 WC Physics, Applied SC Physics GA XY993 UT WOS:A1997XY99300043 ER PT J AU Jenne, DE Olsen, AS Zimmer, M AF Jenne, DE Olsen, AS Zimmer, M TI The human guanidinoacetate methyltransferase (GAMT) gene maps to a syntenic region on 19p13.3, homologous to band C of mouse chromosome 10, but GAMT is not mutated in jittery mice SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID SEQUENCE-ANALYSIS; INBORN ERROR; CREATINE; EXPRESSION; DEFICIENCY; METABOLISM; CLONING; CDNA AB Guanindinoacetate methyltransferase (gene symbol, GAMT) catalyses the synthesis of creatine from guanidinoacetate and S-adensylmethionine. Pathological mutations in the coding region of GAMT were recently identified in two children with symptoms of muscular hypotonia, ataxia, seizures, and abnormal extrapyramidal movements. During contig construction in the telomeric region of human chromosome 19 we identified a cosmid clone carrying the entire GAMT gene. This clone was shown to overlap with cosmids from a contig that was previously mapped to chromosome 19p13.3. The human GAMT gene has a size of about 5 kb and consists of six exons which agree with the published cDNA sequence. Since the mouse mutations jittery/hesitant are located on band C of mouse chromosome 10 in a region of conserved synteny with 19p13.3 and jittery mice exhibit ataxia and abnormal movement behaviour, the genomic sequence of GAMT was determined in wild-type and jittery mice. The coding region of the GAMT gene, however, was not mutated in these mutant mice. Our linkage and sequence data will facilitate the identification of new GAMT mutations in patients suffering from an abnormal creatine metabolism. (C) 1997 Academic Press. C1 LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,LIVERMORE,CA. UNIV WURZBURG,MED KLIN,INST KLIN BIOCHEM & PATHOBIOCHEM,D-97080 WURZBURG,GERMANY. RP Jenne, DE (reprint author), MAX PLANCK INST PSYCHIAT,ABT NEUROIMMUNOL,KLOPFERSPITZ 18A,D-82152 MARTINSRIED,GERMANY. NR 10 TC 8 Z9 10 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD SEP 29 PY 1997 VL 238 IS 3 BP 723 EP 727 DI 10.1006/bbrc.1997.9992 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA YA668 UT WOS:A1997YA66800008 PM 9325156 ER PT J AU Akella, J Weir, S Wills, JM Soderlind, P AF Akella, J Weir, S Wills, JM Soderlind, P TI Structural stability in uranium SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Letter ID CRYSTAL-STRUCTURES; METAL; TRANSFORMATIONS; SYSTEMS; ATOMS; GPA AB Diamond-anvil cell experiments and first-principles theory have been used to investigate the structural stability of uranium up to 1 Mbar in pressure. Experiments and theory agree; there is no phase transition in uranium below 1 Mbar. Previous speculations about a crystallographic phase transition in uranium below this pressure are thus shown to be incorrect. In this regard, uranium is exceptional in the series of light actinides, where pressure-induced phase transitions typically occur at pressure below 1 Mbar. The ground-state crystal structure of uranium is orthorhombic with three structural parameters: the axial ratios b/a and c/a, and an internal parameter y measuring the displacement, along the b-axis, of alternate planes. The experimental and theoretical results reported here indicate that one of these parameters, c/a, is substantially more sensitive to pressure than the other two, changing by as much as 5%, while b/a and y are constant within 1% within the pressure range studied. This flexibility in the alpha-U structure facilitates this structure over a wide pressure range. Theory suggests that electrostatic contributions to the total energy drive the variation in the c/a ratio as a function of pressure, and a simple model is utilized to show this. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RI Weir, Samuel/H-5046-2012 NR 25 TC 38 Z9 39 U1 3 U2 15 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD SEP 29 PY 1997 VL 9 IS 39 BP L549 EP L555 DI 10.1088/0953-8984/9/39/003 PG 7 WC Physics, Condensed Matter SC Physics GA XZ431 UT WOS:A1997XZ43100003 ER PT J AU Honold, MM Harrison, N Singleton, J Yaguchi, H Mielke, C Rickel, D Deckers, I Reinders, PHP Herlach, F Kurmoo, M Day, P AF Honold, MM Harrison, N Singleton, J Yaguchi, H Mielke, C Rickel, D Deckers, I Reinders, PHP Herlach, F Kurmoo, M Day, P TI The importance of edge states in the quantum Hall regime of the organic conductor alpha-(BEDT-TTF)(2)KHg(SCN)(4) SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Letter ID HIGH-FIELD MAGNETOTRANSPORT; PULSED MAGNETIC-FIELDS; BREAKDOWN; OSCILLATIONS; SCATTERING; INTERPLAY; METALS; PHASE; SALT; BULK AB We report measurements of the longitudinal magnetoresistance rho(zz) and magnetization of alpha-(BEDT-TTF)(2)KHg(SCN)(4) in pulsed magnetic fields of up to 50 T and temperatures down to 400 mK, using samples of different purity. Below 2 K the amplitude of the Shubnikov-de Haas oscillations in rho(zz) is found to decrease dramatically with falling temperature. This effect is shown to coincide with quasipersistent eddy current resonances in the magnetization, which are a signature of the quantum Hall effect. Evidence is provided for the existence of a novel interplane conduction mechanism involving highly metallic edge states with supressed scattering at the surface of the sample (a so-called 'chiral Fermi liquid'), operational when the chemical potential is between Landau levels in the bulk of the material. C1 LOS ALAMOS NATL LAB, NATL HIGH MAGNET FIELD LAB, LOS ALAMOS, NM 87545 USA. KATHOLIEKE UNIV LEUVEN, VASTE STOF FYS & MAGNETISME LAB, B-3001 HEVERLEE, BELGIUM. UCL ROYAL INST GREAT BRITAIN, LONDON W1X 4BS, ENGLAND. RP Honold, MM (reprint author), UNIV OXFORD, CLARENDON LAB, DEPT PHYS, PARKS RD, OXFORD OX1 3PU, ENGLAND. RI Mielke, Charles/S-6827-2016 OI Mielke, Charles/0000-0002-2096-5411 NR 35 TC 26 Z9 26 U1 0 U2 5 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 SEP 29 PY 1997 VL 9 IS 39 BP L533 EP L541 DI 10.1088/0953-8984/9/39/001 PG 9 WC Physics, Condensed Matter SC Physics GA XZ431 UT WOS:A1997XZ43100001 ER PT J AU Dorey, N Khoze, VV Mattis, MP Tong, D Vandoren, S AF Dorey, N Khoze, VV Mattis, MP Tong, D Vandoren, S TI Instantons, three-dimensional gauge theory, and the Atiyah-Hitchin manifold SO NUCLEAR PHYSICS B LA English DT Article ID DYNAMICS; MONOPOLE; DYON AB We investigate quantum effects on the Coulomb branch of three-dimensional N = 4 supersymmetric gauge theory with gauge group SU(2). We calculate perturbative and one-instanton contributions to the Wilsonian effective action using standard weak-coupling methods. Unlike the four-dimensional case, and despite supersymmetry, the contribution of non-zero-modes to the instanton measure does not cancel. Our results allow us to fix the weak-coupling boundary conditions for the differential equations which determine the hyper-Kahler metric on the quantum moduli,space. We confirm the proposal of Seiberg and Witten that the Coulomb branch is equivalent, as a hyper-Kahler manifold, to the centered moduli space of two BPS monopoles constructed by Atiyah and Hitchin. (C) 1997 Elsevier Science B.V. C1 UNIV DURHAM,CTR PARTICLE THEORY,DEPT PHYS,DURHAM DH1 3LE,ENGLAND. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP Dorey, N (reprint author), UNIV COLL SWANSEA,DEPT PHYS,SINGLETON PK,SWANSEA SA2 8PP,W GLAM,WALES. OI Tong, David/0000-0001-9120-2174; Khoze, Valentin V/0000-0003-3006-4147 NR 29 TC 55 Z9 55 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 29 PY 1997 VL 502 IS 1-2 BP 59 EP 93 DI 10.1016/S0550-3213(97)00454-9 PG 35 WC Physics, Particles & Fields SC Physics GA YC428 UT WOS:A1997YC42800004 ER PT J AU Dorey, N Khoze, VV Mattis, MP AF Dorey, N Khoze, VV Mattis, MP TI Multi-instantons, three-dimensional gauge theory, and the Gauss-Bonnet-Chern theorem SO NUCLEAR PHYSICS B LA English DT Article ID YANG-MILLS THEORY; N=2 SUPERSYMMETRIC QCD; MULTIINSTANTON CALCULUS; MONOPOLES; DUALITY; SPACE; DYNAMICS; GEOMETRY AB We calculate multi-instanton effects in a three-dimensional gauge theory with N = 8 supersymmetry and gauge group SU(2). The k-instanton contribution to an eight-fermion correlator is found to be proportional to the Gauss-Bonnet-Chem integral of the Gaussian curvature over the centered moduli space of charge-k BPS monopoles, (M) over tilde(k). For k = 2 the integral can be evaluated using the explicit metric on (M) over tilde(2) found by Atiyah and Hitchin. In this case the integral is equal to the Euler character of the manifold. More generally the integral is the volume contribution to the index of the Euler operator on (M) over tilde(k), which may differ from the Euler character by a boundary term. We conjecture that the boundary terms vanish and evaluate the multi-instanton contributions using recent results for the cohomology of (M) over tilde(k). We comment briefly on the implications of our result for a recently proposed test of M(atrix) theory. (C) 1997 Elsevier Science B.V. C1 UNIV DURHAM,CTR PARTICLE THEORY,DEPT PHYS,DURHAM DH1 3LE,ENGLAND. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP Dorey, N (reprint author), UNIV COLL SWANSEA,DEPT PHYS,SINGLETON PK,SWANSEA SA2 8PP,W GLAM,WALES. OI Khoze, Valentin V/0000-0003-3006-4147 NR 34 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 29 PY 1997 VL 502 IS 1-2 BP 94 EP 106 DI 10.1016/S0550-3213(97)00455-0 PG 13 WC Physics, Particles & Fields SC Physics GA YC428 UT WOS:A1997YC42800005 ER PT J AU deBoer, J Hori, K Oz, Y Yin, Z AF deBoer, J Hori, K Oz, Y Yin, Z TI Branes and mirror symmetry in N=2 supersymmetric gauge theories in three dimensions SO NUCLEAR PHYSICS B LA English DT Article DE supersymmetric gauge theory; mirror symmetry; non-perturbative method; superpotential; p-brane; string theory AB We use brane configurations and SL(2,Z) symmetry of the type IIB string to construct mirror N = 2 supersymmetric gauge theories in three dimensions. The mirror map exchanges Higgs and Coulomb branches, Fayet-Iliopoulos and mass parameters and U(1)(R) symmetries. Some quantities that are determined at the quantum level in one theory are determined at the classical level of the mirror. One such example is the complex structure of the Coulomb branch of one theory, which is determined quantum mechanically. It is mapped to the complex structure of the Higgs branch of the mirror theory, which is determined classically. We study the generation of N = 2 superpotentials by open D-string instantons in the brane configurations. (C) 1997 Published by Elsevier Science B.V. C1 ERNEST ORLANDO LAWRENCE BERKELEY NATL LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP deBoer, J (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,366 LECONTE HALL,BERKELEY,CA 94720, USA. NR 17 TC 73 Z9 73 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 29 PY 1997 VL 502 IS 1-2 BP 107 EP 124 DI 10.1016/S0550-3213(97)00444-6 PG 18 WC Physics, Particles & Fields SC Physics GA YC428 UT WOS:A1997YC42800006 ER PT J AU Alles, B Henty, DS Panagopoulos, H Parrinello, C Pittori, C Richards, DG AF Alles, B Henty, DS Panagopoulos, H Parrinello, C Pittori, C Richards, DG TI alpha(s) from the non-perturbatively renormalised lattice three-gluon vertex SO NUCLEAR PHYSICS B LA English DT Article ID YANG-MILLS THEORY; COUPLING-CONSTANT; LAMBDA-PARAMETERS; GAUGE-THEORIES; CONTINUUM QCD; CONNECTION AB We compute the running QCD coupling on the lattice by evaluating two-point and three-point off-shell gluon Green's functions in a fixed gauge and imposing non-perturbative renormalisation conditions on them. Our exploratory study is performed in the quenched approximation at beta = 6.0 on 16(4) and 24(4) lattices. We show that, for momenta in the range 1.8-2.3 GeV, our coupling runs according to the two-loop asymptotic formula, allowing a precise determination of the corresponding Lambda parameter, The role of lattice artifacts and finite-volume effects is carefully analysed and these appear to be under control in the momentum range of interest. Our renormalisation procedure corresponds to a momentum subtraction scheme in continuum field theory, and therefore lattice perturbation theory is not needed in order to match our results to the <(MS)over bar> scheme, thus eliminating a major source of uncertainty in the determination of alpha(<(MS)over bar>). Our method can be applied directly to the unquenched case. (C) 1997 Elsevier Science B.V. C1 UNIV PISA, DIPARTIMENTO FIS, I-56126 PISA, ITALY. UNIV EDINBURGH, DEPT PHYS & ASTRON, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND. UNIV CYPRUS, DEPT NAT SCI, CY-1678 NICOSIA, CYPRUS. UNIV LIVERPOOL, DEPT MATH SCI, LIVERPOOL L69 3BX, MERSEYSIDE, ENGLAND. UNIV PARIS 11, PHYS THEOR & HAUTES ENERGIES LAB, F-91405 ORSAY, FRANCE. FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. RI Pittori, Carlotta/C-7710-2016 OI Pittori, Carlotta/0000-0001-6661-9779 NR 21 TC 62 Z9 62 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 29 PY 1997 VL 502 IS 1-2 BP 325 EP 342 DI 10.1016/S0550-3213(97)00483-5 PG 18 WC Physics, Particles & Fields SC Physics GA YC428 UT WOS:A1997YC42800015 ER PT J AU Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Selen, M Thaler, JJ Edwards, KW Bellerive, A Janicek, R MacFarlane, DB Patel, PM Sadoff, AJ Ammar, R Baringer, P Bean, A Besson, D Coppage, D Darling, C Davis, R Hancock, N Kotov, S Kravchenko, I Kwak, N Anderson, S Kubota, Y Lee, SJ ONeill, JJ Patton, S Poling, R Riehle, T Savinov, V Smith, A Alam, MS Athar, SB Ling, Z Mahmood, AH Severini, H Timm, S Wappler, F Anastassov, A Blinov, S Duboscq, JE Fujino, D Gan, KK Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, MB Sung, M Undrus, A Wanke, R Wolf, A Zoeller, MM Nemati, B Richichi, SJ Ross, WR Skubic, P Bishai, M Fast, J Gerndt, E Hinson, JW Menon, N Miller, DH Shibata, EI Shipsey, LPJ Yurko, M Gibbons, L Glenn, S Johnson, SD Kwon, Y Roberts, S Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Ugolini, D Wang, R Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Shelkov, V Staeck, J Stroynowski, R Volobouev, I Ye, J Artuso, M Efimov, A Gao, M Goldberg, M He, D Kopp, S Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Viehhauser, G Xing, X Bartelt, J Csorna, SE Jain, V McLean, KW Marka, S Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Zhou, GJ Barish, B Chadha, M Chan, S Eigen, G Miller, JS OGrady, C Schmidtler, M Urheim, J Weinstein, AJ Wurthwein, F Bliss, DW Masek, G Paar, HP Prell, S Sharma, V Asner, DM Gronberg, J Hill, TS Kutschke, R Lange, DJ Menary, S Morrison, RJ Nelson, HN Nelson, TK Qiao, C Richman, JD Roberts, D Ryd, A Witherell, MS Balest, R Behrens, BH Ford, WT Park, H Roy, J Smith, JG Alexander, JP Bebek, C Berger, BE Berkelman, K Bloom, K Cassel, DG Cho, HA Coffman, DM Crowcroft, DS Dickson, M Drell, PS Ecklund, KM Ehrlich, R Foland, AD Gaidarev, P Galik, RS Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hopman, PI Kandaswamy, K Kim, PC Kreinick, DL Lee, T Liu, Y Ludwig, GS Masui, J Mevissen, J Mistry, NB Ng, CR Nordberg, E Ogg, M Patterson, JR Peterson, D Riley, D Soffer, A ValantSpaight, B Ward, C Athanas, M Avery, P Jones, CD Lohner, M Prescott, C Yelton, J Zheng, J Brandenburg, G Briere, RA Ershov, A Gao, YS Kim, DYJ Wilson, R Yamamoto, H Browder, TE Li, F Li, Y Rodriguez, JL AF Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Selen, M Thaler, JJ Edwards, KW Bellerive, A Janicek, R MacFarlane, DB Patel, PM Sadoff, AJ Ammar, R Baringer, P Bean, A Besson, D Coppage, D Darling, C Davis, R Hancock, N Kotov, S Kravchenko, I Kwak, N Anderson, S Kubota, Y Lee, SJ ONeill, JJ Patton, S Poling, R Riehle, T Savinov, V Smith, A Alam, MS Athar, SB Ling, Z Mahmood, AH Severini, H Timm, S Wappler, F Anastassov, A Blinov, S Duboscq, JE Fujino, D Gan, KK Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, MB Sung, M Undrus, A Wanke, R Wolf, A Zoeller, MM Nemati, B Richichi, SJ Ross, WR Skubic, P Bishai, M Fast, J Gerndt, E Hinson, JW Menon, N Miller, DH Shibata, EI Shipsey, LPJ Yurko, M Gibbons, L Glenn, S Johnson, SD Kwon, Y Roberts, S Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Ugolini, D Wang, R Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Shelkov, V Staeck, J Stroynowski, R Volobouev, I Ye, J Artuso, M Efimov, A Gao, M Goldberg, M He, D Kopp, S Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Viehhauser, G Xing, X Bartelt, J Csorna, SE Jain, V McLean, KW Marka, S Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Zhou, GJ Barish, B Chadha, M Chan, S Eigen, G Miller, JS OGrady, C Schmidtler, M Urheim, J Weinstein, AJ Wurthwein, F Bliss, DW Masek, G Paar, HP Prell, S Sharma, V Asner, DM Gronberg, J Hill, TS Kutschke, R Lange, DJ Menary, S Morrison, RJ Nelson, HN Nelson, TK Qiao, C Richman, JD Roberts, D Ryd, A Witherell, MS Balest, R Behrens, BH Ford, WT Park, H Roy, J Smith, JG Alexander, JP Bebek, C Berger, BE Berkelman, K Bloom, K Cassel, DG Cho, HA Coffman, DM Crowcroft, DS Dickson, M Drell, PS Ecklund, KM Ehrlich, R Foland, AD Gaidarev, P Galik, RS Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hopman, PI Kandaswamy, K Kim, PC Kreinick, DL Lee, T Liu, Y Ludwig, GS Masui, J Mevissen, J Mistry, NB Ng, CR Nordberg, E Ogg, M Patterson, JR Peterson, D Riley, D Soffer, A ValantSpaight, B Ward, C Athanas, M Avery, P Jones, CD Lohner, M Prescott, C Yelton, J Zheng, J Brandenburg, G Briere, RA Ershov, A Gao, YS Kim, DYJ Wilson, R Yamamoto, H Browder, TE Li, F Li, Y Rodriguez, JL TI First observation of tau->3 pi eta nu(tau) and tau->f(1)pi nu(tau) decays SO PHYSICAL REVIEW LETTERS LA English DT Article ID TAU-DECAYS; LIBRARY; UPGRADE; KORALB; LEPTON AB We have observed new channels for tau decays with an eta in the final state. We study 3-prong tau decays, using the eta --> gamma gamma and eta --> 3 pi(0) decay modes and 1-prong decays with two pi(0)'s using the eta --> gamma channel. The measured branching fractions B(tau(-)-->pi(-)pi(-)pi(+)eta nu(tau)) = (3.4-(0.6)(0.5) +/- 0.6) x 10(-4) and B(tau(-) --> pi(-)2 pi(0) eta nu<(tau>)) = (1.4 +/- 0.6 +/- 0.3) x 10(-4). We observe clear evidence for f(1) --> eta pi pi substructure and measure B(pi(-) --> F-1 pi(-)nu(tau)) = (5.8(-1.3)(+1.4) +/- 1.8) x 10(-4). We have also searched for eta'(958) production and obtain 90% C.L. upper limits B(tau(-) --> pi(-)eta'nu(tau)) < 7.4 x 10(-5) 10-5 and B(tau(-) --> pi(-) --> pi(-)pi(0) eta'nu(tau)) < 8.0 x 10(-5). C1 CARLETON UNIV,OTTAWA,ON K1S 5B6,CANADA. INST PARTICLE PHYS,MONTREAL,PQ,CANADA. MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA. ITHACA COLL,ITHACA,NY 14850. UNIV KANSAS,LAWRENCE,KS 66045. UNIV MINNESOTA,MINNEAPOLIS,MN 55455. SUNY ALBANY,ALBANY,NY 12222. OHIO STATE UNIV,COLUMBUS,OH 43210. UNIV OKLAHOMA,NORMAN,OK 73019. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. SO METHODIST UNIV,DALLAS,TX 75275. SYRACUSE UNIV,SYRACUSE,NY 13244. VANDERBILT UNIV,NASHVILLE,TN 37235. VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061. WAYNE STATE UNIV,DETROIT,MI 48202. CALTECH,PASADENA,CA 91125. UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106. UNIV COLORADO,BOULDER,CO 80309. CORNELL UNIV,ITHACA,NY 14853. UNIV FLORIDA,GAINESVILLE,FL 32611. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV HAWAII MANOA,HONOLULU,HI 96822. BINP,RU-630090 NOVOSIBIRSK,RUSSIA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. UNIV TEXAS,AUSTIN,TX 78712. RP Bergfeld, T (reprint author), UNIV ILLINOIS,CHAMPAIGN,IL 61801, USA. RI Briere, Roy/N-7819-2014 OI Briere, Roy/0000-0001-5229-1039 NR 21 TC 29 Z9 29 U1 1 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 SEP 29 PY 1997 VL 79 IS 13 BP 2406 EP 2410 DI 10.1103/PhysRevLett.79.2406 PG 5 WC Physics, Multidisciplinary SC Physics GA XZ114 UT WOS:A1997XZ11400005 ER PT J AU Gorska, M Lipoglavsek, M Grawe, H Nyberg, J Atac, A Axelsson, A Bark, R Blomqvist, J Cederkall, J Cederwall, B deAngelis, G Fahlander, C Johnson, A Leoni, S Likar, A Matiuzzi, M Mitarai, S Norlin, LO Palacz, M Persson, J Roth, HA Schubart, R Seweryniak, D Shizuma, T Skeppstedt, O Sletten, G Walters, WB Weiszflog, M AF Gorska, M Lipoglavsek, M Grawe, H Nyberg, J Atac, A Axelsson, A Bark, R Blomqvist, J Cederkall, J Cederwall, B deAngelis, G Fahlander, C Johnson, A Leoni, S Likar, A Matiuzzi, M Mitarai, S Norlin, LO Palacz, M Persson, J Roth, HA Schubart, R Seweryniak, D Shizuma, T Skeppstedt, O Sletten, G Walters, WB Weiszflog, M TI Cd-98(48)50: The two-proton-hole spectrum in Sn-100(50)50 SO PHYSICAL REVIEW LETTERS LA English DT Article ID SHELL-MODEL CALCULATIONS; 80-100 MASS REGION; NUCLEAR-STRUCTURE; EXCITED-STATES; 50 NUCLEI; NEUTRON; ISOTOPES; PARTICLE; ISOMER; PD-96 AB Excited states in Cd-98, two proton holes from Sn-100, were identified and studied for the first time, using in-beam spectroscopy with highly selective ancillary detectors. The structure of the (pi g(9/2))(-2) two-proton-hole spectrum below a T-1/2 = 0.48(16) mu s isomer is deduced and compared to shell-model predictions. A tentative I-pi = (8(+)) assignment, as suggested by systematics, yields a strongly reduced B(E2,8(+) --> 6(+)) = 0.44((+20)(-10)) W.u., corresponding to an effective proton charge of e(pi) = 0.85((+20)(-10))e, which is at variance with existing theoretical predictions. C1 UNIV WARSAW,INST EXPT PHYS,WARSAW,POLAND. UPPSALA UNIV,SVEDBERG LAB,UPPSALA,SWEDEN. UPPSALA UNIV,DEPT RADIAT SCI,UPPSALA,SWEDEN. JOZEF STEFAN INST,LJUBLJANA,SLOVENIA. HAHN MEITNER INST BERLIN GMBH,D-1000 BERLIN,GERMANY. UNIV COPENHAGEN,NIELS BOHR INST,DK-2100 COPENHAGEN,DENMARK. ROYAL INST TECHNOL,DEPT PHYS,S-10044 STOCKHOLM,SWEDEN. IST NAZL FIS NUCL,LAB NAZL LEGNARO,I-35020 LEGNARO,PADOVA,ITALY. KYUSHU UNIV,FAC SCI,DEPT PHYS,FUKUOKA 812,JAPAN. SOLTAN INST NUCL STUDIES,OTWOCK,POLAND. CHALMERS UNIV TECHNOL,S-41296 GOTHENBURG,SWEDEN. ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV MARYLAND,DEPT CHEM,COLLEGE PK,MD 20742. RP Gorska, M (reprint author), GESELL SCHWERIONENFORSCH MBH,PLANCKSTR 1,D-64291 DARMSTADT,GERMANY. RI Cederwall, Bo/M-3337-2014; Palacz, Marcin/H-3713-2012 OI Cederwall, Bo/0000-0003-1771-2656; NR 38 TC 64 Z9 64 U1 2 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 SEP 29 PY 1997 VL 79 IS 13 BP 2415 EP 2418 DI 10.1103/PhysRevLett.79.2415 PG 4 WC Physics, Multidisciplinary SC Physics GA XZ114 UT WOS:A1997XZ11400007 ER PT J AU Kendrick, B AF Kendrick, B TI Geometric phase effects in the vibrational spectrum of Na-3(X) SO PHYSICAL REVIEW LETTERS LA English DT Article ID CONICAL INTERSECTIONS; H+O-2 SCATTERING; BERRY PHASES; GROUND-STATE; SPECTROSCOPY; IONIZATION; REPRESENTATION; SYSTEMS; NA3 AB The lowest 89 vibrational energy levels for Na-3(X) for zero total angular momentum (J = 0) are computed both with and without the geometric phase. The calculations are full dimensional (3D) and utilize the vector potential (gauge theory) approach for including geometric phase effects. Tt is shown that the geometric phase leads to large shifts in the vibrational energy levels which result in a different ordering of states. These results can be verified experimentally and represent the first ''clean'' example of a geometric phase effect in molecular spectra. RP Kendrick, B (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,T-12,MS-B268,LOS ALAMOS,NM 87545, USA. NR 38 TC 77 Z9 77 U1 0 U2 8 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 SEP 29 PY 1997 VL 79 IS 13 BP 2431 EP 2434 DI 10.1103/PhysRevLett.79.2431 PG 4 WC Physics, Multidisciplinary SC Physics GA XZ114 UT WOS:A1997XZ11400011 ER PT J AU Ravelo, R Baskes, M AF Ravelo, R Baskes, M TI Equilibrium and thermodynamic properties of grey, white, and liquid tin SO PHYSICAL REVIEW LETTERS LA English DT Article ID EMBEDDED-ATOM POTENTIALS; STRUCTURAL-PROPERTIES; DYNAMICS; PRESSURE; METALS AB The thermodynamic properties of various phases of tin are calculated employing the method of adiabatic switching with modified embedded atom method (MEAM) potentials. The experimental alpha --> beta and beta --> liquid transition temperatures are reproduced within an 11% accuracy. Good agreement with experiments is also obtained for other thermodynamic quantities. We demonstrate the versatility and accuracy of MEAM by how well it reproduces both metallic and covalent phases of tin over a wide temperature range and over a wide ranee of densities. C1 UNIV TEXAS,INST MAT RES,EL PASO,TX 79968. SANDIA NATL LABS,MAT RELIABIL DEPT,LIVERMORE,CA 94551. RP Ravelo, R (reprint author), UNIV TEXAS,DEPT PHYS,EL PASO,TX 79968, USA. NR 24 TC 88 Z9 88 U1 2 U2 20 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 SEP 29 PY 1997 VL 79 IS 13 BP 2482 EP 2485 DI 10.1103/PhysRevLett.79.2482 PG 4 WC Physics, Multidisciplinary SC Physics GA XZ114 UT WOS:A1997XZ11400024 ER PT J AU Hannon, JB Klunker, C Giesen, M Ibach, H Bartelt, NC Hamilton, JC AF Hannon, JB Klunker, C Giesen, M Ibach, H Bartelt, NC Hamilton, JC TI Surface self-diffusion by vacancy motion: Island ripening on Cu(001) SO PHYSICAL REVIEW LETTERS LA English DT Article ID SCANNING TUNNELING MICROSCOPE; TEMPERATURE AB We have used scanning tunneling microscopy to study the Ostwald ripening of 2D islands of Cu grown on Cu(001). By considering the time dependence of the sizes of individual islands we have characterized the mechanisms for the ripening. Our result is unexpected for a simple metal surface: The flow of atoms from one island to another is limited by attachment-detachment kinetics at the island edges. To explain this result, we propose that the transport of atoms between islands occurs by vacancy rather than by adatom, diffusion. C1 FORSCHUNGSZENTRUM,INST GRENZFLACHENFORSCH & VAKUUMPHYS,D-52425 JULICH,GERMANY. SANDIA NATL LABS,LIVERMORE,CA 94551. OI Giesen, Margret/0000-0002-7656-887X NR 15 TC 126 Z9 126 U1 0 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 SEP 29 PY 1997 VL 79 IS 13 BP 2506 EP 2509 DI 10.1103/PhysRevLett.79.2506 PG 4 WC Physics, Multidisciplinary SC Physics GA XZ114 UT WOS:A1997XZ11400030 ER PT J AU Giller, D Shaulov, A Prozorov, R Abulafia, Y Wolfus, Y Burlachkov, L Yeshurun, Y Zeldov, E Vinokur, VM Peng, JL Greene, RL AF Giller, D Shaulov, A Prozorov, R Abulafia, Y Wolfus, Y Burlachkov, L Yeshurun, Y Zeldov, E Vinokur, VM Peng, JL Greene, RL TI Disorder-induced transition to entangled vortex solid in Nd-Ce-Cu-O crystal SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; PHASE-DIAGRAM; MIXED-STATE; BI2SR2CACU2O8+Y; MAGNETIZATION; YBA2CU3O7-DELTA; DEPENDENCE; CROSSOVER; CREEP AB Local magnetic measurements in a highly anisotropic Nd-Ce-Cu-O crystal reveal a sharp onset of an anomalous magnetization peak at a temperature-dependent field B-on. The same field marks a change in the field profiles across the sample, from profiles dominated by geometrical barriers below B-on to Bean-like profiles above it. The temperature dependence of B-on and the flux distribution above and below B-on imply a disorder-induced transition at B-on from a relatively ordered vortex lattice to a highly disordered, entangled vortex solid. Local magnetic relaxation measurements above B-on show evidence for plastic vortex creep associated with the morion of dislocations in the entangled vortex structure. C1 WEIZMANN INST SCI,DEPT CONDENSED MATTER PHYS,IL-76100 REHOVOT,ISRAEL. ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV MARYLAND,DEPT PHYS,COLLEGE PK,MD 20742. UNIV MARYLAND,CTR SUPERCONDUCT RES,COLLEGE PK,MD 20742. RP Giller, D (reprint author), BAR ILAN UNIV,DEPT PHYS,CTR SUPERCONDUCT,IL-52900 RAMAT GAN,ISRAEL. RI Prozorov, Ruslan/A-2487-2008; Zeldov, Eli/K-1546-2012 OI Prozorov, Ruslan/0000-0002-8088-6096; Zeldov, Eli/0000-0002-8200-4974 NR 30 TC 133 Z9 134 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 SEP 29 PY 1997 VL 79 IS 13 BP 2542 EP 2545 DI 10.1103/PhysRevLett.79.2542 PG 4 WC Physics, Multidisciplinary SC Physics GA XZ114 UT WOS:A1997XZ11400039 ER PT J AU Brooks, MSS Eriksson, O Wills, JM Johansson, B AF Brooks, MSS Eriksson, O Wills, JM Johansson, B TI Density functional theory of crystal field quasiparticle excitations and the ab initio calculation of spin Hamiltonian parameters SO PHYSICAL REVIEW LETTERS LA English DT Article ID TRANSITION-METAL INTERMETALLICS; TIN-ORBITAL CALCULATIONS; MAGNETIC-PROPERTIES; MAGNETOCRYSTALLINE ANISOTROPY; CONDUCTION ELECTRONS; COULOMBIC PART; BRILLOUIN-ZONE; SPECIAL POINTS; EARTH; EXCHANGE AB We show, by carefully examining the change of total energy in constrained variational calculations using the local spin density approximation, that crystal field excitations in normal rare earths are quasiparticles composed of a 4f excitation plus its associated cloud of shielding conduction electrons. Total energy calculations, which properly exclude the self-interaction of the nonspherical part of the 4f densities, are then used to calculate crystal field energies and the corresponding spin Hamiltonian parameters of TmSb and PrSb, accurately from first principles. C1 UNIV UPPSALA, INST PHYS, CONDENSED MATTER THEORY GRP, S-75121 UPPSALA, SWEDEN. LOS ALAMOS NATL LAB, CTR MAT SCI, LOS ALAMOS, NM 87545 USA. LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. RP COMMISS EUROPEAN COMMUNITIES, JOINT RES CTR, INST TRANSURANIUM ELEMENTS, POSTFACH 2340, D-76125 KARLSRUHE, GERMANY. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 41 TC 20 Z9 20 U1 2 U2 6 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 SEP 29 PY 1997 VL 79 IS 13 BP 2546 EP 2549 DI 10.1103/PhysRevLett.79.2546 PG 4 WC Physics, Multidisciplinary SC Physics GA XZ114 UT WOS:A1997XZ11400040 ER PT J AU Diehl, S Cubaynes, D Kennedy, ET Wuilleumier, FJ Bizau, JM Journel, L VoKy, L Faucher, P Hibbert, A Blancard, C Berrah, N Morgan, TJ Bozek, J Schlachter, AS AF Diehl, S Cubaynes, D Kennedy, ET Wuilleumier, FJ Bizau, JM Journel, L VoKy, L Faucher, P Hibbert, A Blancard, C Berrah, N Morgan, TJ Bozek, J Schlachter, AS TI Hollow-atom-hollow-ion decay routes of triply excited lithium: first Auger results and a comparison with R-matrix calculations SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Letter ID HIGH-RESOLUTION; STATES; NITROGEN; AUTOIONIZATION; PHOTOIONIZATION; RESONANCES; ENERGIES; RATES; LI; XE AB We present the first photoelectron results for hollow-atom-hollow-ion decay paths of triply excited lithium, in which the hollow lithium atoms Li(nln'l'n''l'') decay via,hollow Li+(nln'l') and then to Li2+ ions. The high-resolution data, obtained at the 9.01 beamline of the Advanced Light Source at Berkeley, provide considerable insight into the decay pattern of the various hollow lithium resonances. Tracking the secondary Li+ Auger decays as functions of the incident photon energy provides new data on triply excited resonances. The results compare favourably with recent advanced R-matrix calculations. Detection of the individual Li+ Auger decay lines also provides information on the energies and widths of a number of doubly excited levels of the ion. C1 DUBLIN CITY UNIV,SCH PHYS SCI,DUBLIN 9,IRELAND. OBSERV COTE AZUR,F-06304 NICE,FRANCE. QUEENS UNIV BELFAST,BELFAST,ANTRIM,NORTH IRELAND. CTR ETUD LIMEIL VALENTON,DRIF,F-94195 VILLENEUVE,FRANCE. WESTERN MICHIGAN UNIV,DEPT PHYS,KALAMAZOO,MI 48049. WESLEYAN UNIV,DEPT PHYS,MIDDLETOWN,CT 06459. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,ADV LIGHT SOURCE ERNEST ORLANDO,BERKELEY,CA. RP Diehl, S (reprint author), UNIV PARIS 11,URA 775 CNRS,LAB SPECT ATOM & ION,B350,F-91405 ORSAY,FRANCE. RI Bozek, John/E-4689-2010; Bozek, John/E-9260-2010 OI Bozek, John/0000-0001-7486-7238 NR 41 TC 36 Z9 36 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD SEP 28 PY 1997 VL 30 IS 18 BP L595 EP L605 DI 10.1088/0953-4075/30/18/002 PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA XZ438 UT WOS:A1997XZ43800002 ER PT J AU Ghan, SJ Leung, LR Easter, RC AbdulRazzak, K AF Ghan, SJ Leung, LR Easter, RC AbdulRazzak, K TI Prediction of cloud droplet number in a general circulation model SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID MARINE BOUNDARY-LAYER; MICROPHYSICAL PROCESSES; ANTHROPOGENIC AEROSOLS; NUMERICAL-SIMULATION; RADIATION BUDGET; CLOSURE-MODEL; CLIMATE MODEL; LIQUID WATER; PARAMETERIZATION; STRATOCUMULUS AB A predictive treatment of droplet number is applied to both a single-column cloud model and a global circulation model. Droplet number is predicted from the droplet number balance, which accounts for droplet nucleation, mixing, and droplet loss due to autoconversion of droplets to rain and collection by rain, ice, and snow. Droplet nucleation is parameterized in terms of the parameters of a lognormal aerosol size distribution and in terms of a Gaussian probability distribution of vertical velocity within each grid cell. The predicted droplet number is found to be significantly less than observations unless vertical resolution provides at least 10 levels within the planetary boundary layer. When droplet number is simply diagnosed from the number nucleated, droplet concentrations are found to be consistently greater than with the predictive treatment. Predicted droplet number concentrations are found to be nonlinearly related to aerosol number concentration. C1 TEXAS A&M UNIV, KINGSVILLE, TX 78363 USA. RP PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. RI Ghan, Steven/H-4301-2011 OI Ghan, Steven/0000-0001-8355-8699 NR 44 TC 139 Z9 140 U1 1 U2 5 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 SEP 27 PY 1997 VL 102 IS D18 BP 21777 EP 21794 DI 10.1029/97JD01810 PG 18 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA XY462 UT WOS:A1997XY46200008 ER PT J AU Pan, WW Tatang, MA McRae, GJ Prinn, RG AF Pan, WW Tatang, MA McRae, GJ Prinn, RG TI Uncertainty analysis of direct radiative forcing by anthropogenic sulfate aerosols SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID GENERAL-CIRCULATION MODELS; CLIMATE; PERTURBATIONS; PROJECT; GASES AB Uncertainty in the direct radiative forcing by anthropogenic sulfate aerosols is analyzed for four different aerosol model structures with 13 uncertain parameters using a second-order probabilistic collocation method. The resulting probability density functions agree well with those determined here by a computationally much more expensive 10,000-point Monte Carlo method. The structural difference, measured by the range of the mean responses in models with different approximations, is -0.28 to -1.3 W m(-2), and the parametric uncertainty, induced by the uncertainties in the model parameters, is -0.1 to -4.2 W m(-2), both with 95% confidence. This implies that refining uncertain input parameters may be more important than improving models in order to minimize the overall uncertainty in the direct radiative forcing by anthropogenic sulfate aerosols in these four models. The variance analysis indicates that the parametric uncertainty comes mainly from sulfate yield, sulfate lifetime, and ambient relative humidity. Variance contributions from aerosol size parameters are much smaller, and this finding agrees with the sensitivity analysis by Boucher and Anderson [1995]. Note that the conclusions reached here are dependent on the chosen model structures and parameter distributions. This study presents a computationally efficient framework for assessing uncertainty in aerosol radiative forcing which could be used to address an even wider range of structures and parameters in the future. C1 MIT, DEPT CHEM ENGN, CAMBRIDGE, MA 02139 USA. MIT, CTR GLOBAL CHANGE SCI, CAMBRIDGE, MA 02139 USA. UNIV INDONESIA, DEPOK 16424, INDONESIA. RP LAWRENCE LIVERMORE NATL LAB, ATMOSPHER SCI DIV, L-103, POB 808, LIVERMORE, CA 94550 USA. NR 45 TC 27 Z9 30 U1 0 U2 1 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 SEP 27 PY 1997 VL 102 IS D18 BP 21915 EP 21924 DI 10.1029/97JD01653 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA XY462 UT WOS:A1997XY46200017 ER PT J AU Tatang, MA Pan, WW Prinn, RG McRae, GJ AF Tatang, MA Pan, WW Prinn, RG McRae, GJ TI An efficient method for parametric uncertainty analysis of numerical geophysical models SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID GENERAL-CIRCULATION MODELS; ANTHROPOGENIC AEROSOLS; SENSITIVITY ANALYSIS; SYSTEMS; PERTURBATIONS AB A new method for parametric uncertainty analysis of numerical geophysical models is presented. It approximates model response surfaces, which are functions of model input parameters, using orthogonal polynomials, whose weighting functions are the probabilistic density functions (PDFs) of the input uncertain parameters. This approach has been applied to the uncertainty analysis of an analytical model of the direct radiative forcing by anthropogenic sulfate aerosols which has nine uncertain parameters. This method is shown to generate PDFs of the radiative forcing which are very similar to the exact analytical PDF. Compared with the Monte Carlo method for this problem, the new method is a factor of 25 to 60 times faster, depending on the error tolerance, and exhibits an exponential decrease of error with increasing order of the approximation. C1 MIT, DEPT CHEM ENGN, CAMBRIDGE, MA 02139 USA. LAWRENCE LIVERMORE NATL LAB, DIV ATMOSPHER SCI, LIVERMORE, CA 94550 USA. MIT, CTR GLOBAL CHANGE SCI, CAMBRIDGE, MA 02139 USA. RP UNIV INDONESIA, TEKN GAS PETROKIMIA, DEPOK 16424, INDONESIA. NR 38 TC 157 Z9 166 U1 0 U2 12 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 SEP 27 PY 1997 VL 102 IS D18 BP 21925 EP 21932 DI 10.1029/97JD01654 PG 8 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA XY462 UT WOS:A1997XY46200018 ER PT J AU DrozGeorget, T Zyrianov, M Reisler, H Chandler, DW AF DrozGeorget, T Zyrianov, M Reisler, H Chandler, DW TI Correlated distributions in the photodissociation of HNCO to NH(X-3 Sigma(-),a(1)Delta)+CO(X-1 Sigma(+)) near the barrier on S-1 SO CHEMICAL PHYSICS LETTERS LA English DT Article ID ISOCYANIC ACID; STATE DISTRIBUTIONS; REACTION DYNAMICS; ENERGY; NM; SPECTROSCOPY; EXCITATION; CHANNEL; CO AB The photodissociation of HNCO is examined at 230.1 nm, near the threshold to NH(a(1) Delta)+CO(X-1 Sigma(+)). CO products are generated from NH(X-3 Sigma(-))+CO(X-1 Sigma(+)) and NH(a(1) Delta)+CO(X-1 Sigma(+)). Although the two contributions overlap spectroscopically, they are resolved in velocity space when using photofragment ion imaging, For both channels the CO rotational distribution is cold and non-statistical. A high resolution variant of imaging is employed to obtain NH(a(1) Delta) distributions correlating with specific J(CO) levels. Combining these measurements with NH(a(1) Delta) photofragment yield spectra and rotational distributions, we establish that decomposition to NH(a(1) Delta)+CO(X-1 Sigma) evolves over a small barrier on S-1,estimated at 400-600 cm(-1). (C) 1997 Elsevier Science B.V. C1 UNIV SO CALIF,DEPT CHEM,LOS ANGELES,CA 90089. SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550. NR 35 TC 39 Z9 39 U1 1 U2 6 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 SEP 26 PY 1997 VL 276 IS 5-6 BP 316 EP 324 DI 10.1016/S0009-2614(97)00804-X PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XZ478 UT WOS:A1997XZ47800004 ER PT J AU Kreiner, G Franzen, HF AF Kreiner, G Franzen, HF TI The crystal structure of lambda-Al4Mn SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE metal alloys; quasicrystals; manganese; aluminum ID DECAGONAL QUASI-CRYSTAL; AL-MN ALLOYS; TRANSLATIONAL SYMMETRY; PHASE; QUASICRYSTALLINE; APPROXIMANT; AL3MN; MU-MNAL4; MU-AL4MN; SYSTEM AB The crystal structure of the lambda-Al4Mn phase, considered to be closely related to icosahedral quasicrystalline i-AlMn was determined by X-ray analysis. Metallic, hexagonal needles of the lambda-phase were obtained by thermal decomposition of a mixture of Al and MnS. The structure crystallizes in P6(3)/m with a=28.382(9) Angstrom and c=12.389(2) Angstrom. The volume of the cell is 8643 Angstrom(3) and contains an average of 568.1 atoms. 106.6 atoms (18.8 at.%) are Mn, corresponding to a calculated density of 3.517(6) g cm(-3). The final R-values were R-u=9.2% and R-w=5.9% for 2508 reflections with 1>3 sigma. There are 66 atoms in the asymmetric unit. 104 positions in the unit cell are occupied with Mn and 482 with Al. 102 Mn have icosahedral coordination and two Mn a tri-capped trigonal prismatic coordination (CN 9). 36 Al atoms have icosahedral coordination, 138 Al have a polar bi-capped pentagonal prismatic, 72 Al have a bi-equatorial capped pentagonal prismatic and 168 Al a mixed capped pentagonal prismatic with CN 13 or 14, 4 Al a CN 16 Frank-Kasper polyhedron, and 52 Al an irregular coordination polyhedron. Six Al positions are partly occupied and five Al positions show disorder with small amounts of Mn. The distance ranges are Mn-Mn 2.689-2.784 Angstrom, Al-Mn 2.362-2.949 Angstrom and Al-Al 2.424-3.414 Angstrom. Additionally, one short distance of 2.180 Angstrom is between two partly occupied Al sites. The structure of the lambda-phase is a member of the I3-family, containing the I3-cluster, a fragment of three vertex connected icosahedra. The structure is composed of six chains of fused truncated I(2)-tetrahedra in the unit cell, aligned along c. The chains are B-type connected via primitive stacked pseudo I13-clusters. A similar arrangement is found in the structure of mu-Al4.12Mn. (C) 1997 Elsevier Science S.A. C1 IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. US DOE,AMES LAB,AMES,IA 50011. RP Kreiner, G (reprint author), UNIV DORTMUND,FACHBEREICH CHEM,OTTO HAHN STR 6,D-44221 DORTMUND,GERMANY. NR 28 TC 68 Z9 68 U1 0 U2 9 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD SEP 26 PY 1997 VL 261 IS 1-2 BP 83 EP 104 DI 10.1016/S0925-8388(97)00213-2 PG 22 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA YE036 UT WOS:A1997YE03600014 ER PT J AU Gary, R Ludwig, DL Cornelius, HL MacInnes, MA Park, MS AF Gary, R Ludwig, DL Cornelius, HL MacInnes, MA Park, MS TI The DNA repair endonuclease XPG binds to proliferating cell nuclear antigen (PCNA) and shares sequence elements with the PCNA binding regions of FEN-1 and cyclin-dependent kinase inhibitor p21 SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID NUCLEOTIDE EXCISION-REPAIR; C-TERMINAL REGION; POLYMERASE-DELTA; RAD PROTEINS; REPLICATION; BACTERIOPHAGE-T4; DOMAINS; GENE; CDK; COMPLEMENTATION AB Proliferating cell nuclear antigen (PCNA) is a DNA polymerase accessory factor that is required for DNA replication during S phase of the cell cycle and for resynthesis during nucleotide excision repair of damaged DNA, PCNA binds to flap endonuclease 1 (FEN-1), a structure-specific endonuclease involved in DNA replication. Here we report the direct physical interaction of PCNA with xeroderma pigmentosum (XP) G, a structure-specific repair endonuclease that is homologous to FEN-1, We have identified a 28-amino acid region of human FEN-1 (residues 328-355) and a 29-amino acid region of human XPG (residues 981-1009) that contains the PCNA binding activity, These regions share key hydrophobic residues with the PCNA-binding domain of the cyclin-dependent kinase inhibitor p21(Waf1/Cip1), and all three competed with one another for binding to PCNA. A conserved arginine in FEN-1 (Arg(339)) and XPG (Arg(992)) was found to be crucial for PCNA binding activity, R992A and R992E mutant forms of XPG failed to fully reconstitute nucleotide excision repair in an in vivo complementation assay, These results raise the possibility of a mechanistic linkage between excision and repair synthesis that is mediated by PCNA. C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. RI Gary, Ronald/A-8650-2008 OI Gary, Ronald/0000-0001-5079-1953 FU NCI NIH HHS [CA71630] NR 43 TC 174 Z9 180 U1 0 U2 4 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD SEP 26 PY 1997 VL 272 IS 39 BP 24522 EP 24529 DI 10.1074/jbc.272.39.24522 PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA XY515 UT WOS:A1997XY51500067 PM 9305916 ER PT J AU Zamzow, D Lin, CH Small, GJ Jankowiak, R AF Zamzow, D Lin, CH Small, GJ Jankowiak, R TI Application of capillary electrophoresis-fluorescence line-narrowing spectroscopy for on-line spectral characterization of closely related analytes SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article; Proceedings Paper CT 9th International Symposium on High Performance Capillary Electrophoresis and Related Microscale Techniques CY JAN 26-30, 1997 CL ORLANDO, FL DE fluorescence line-narrowing spectroscopy; detection, electrophoresis; DNA; polynuclear aromatic hydrocarbons ID ELECTROSPRAY MASS-SPECTROMETRY; BENZOPYRENE DNA-ADDUCTS; OPTICAL-SPECTRA; MOUSE SKIN; IDENTIFICATION; QUANTITATION; METABOLITES; ERYTHROCYTE; LEVEL AB Capillary electrophoresis (CE) interfaced with low-temperature (4.2 K) fluorescence line-narrowing spectroscopy (FLNS) is used for the separation and spectral characterization of closely related analytes. In this paper, the CE-FLNS system is applied to the analysis of a mixture of deuterated and protonated benzo[a]pyrene, a mixture of structurally similar benzo[a]pyrene and benzo[e]pyrene, and mixtures of dibenzo[a,l]pyrene-derived adenine DNA adducts. The CE-FLNS system provides on-line separation and high-resolution spectroscopic identification of CE-separated analytes, via fingerprint structure of vibrationally resolved FLN spectra at 4.2 K. The combination of the separation power of CE and the spectral selectivity of FLNS provide a methodology that has potential to become a powerful tool for molecular analyte characterization. The main applications of the CE-FLNS system, due to its selectivity, should be in the chemical analysis of structurally similar analytes and applications where analyte purity and detailed structural characterization are required. (C) 1997 Elsevier Science B.V. C1 IOWA STATE UNIV,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. FU NCI NIH HHS [P0I CA49210-05] NR 37 TC 23 Z9 23 U1 0 U2 0 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 SEP 26 PY 1997 VL 781 IS 1-2 BP 73 EP 80 DI 10.1016/S0021-9673(97)00499-8 PG 8 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA YC198 UT WOS:A1997YC19800010 PM 9368378 ER PT J AU Tang, Q Lee, CS AF Tang, Q Lee, CS TI Effects of electroosmotic flow on zone mobilization in capillary isoelectric focusing SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article; Proceedings Paper CT 9th International Symposium on High Performance Capillary Electrophoresis and Related Microscale Techniques CY JAN 26-30, 1997 CL ORLANDO, FL DE isoelectric focusing; electroosmotic flow; proteins ID HIGH-PERFORMANCE ELECTROPHORESIS; DISPLACEMENT AB The electroosmotic mobilization of focused protein zones in a fused-silica capillary is investigated using a mixture of model proteins, including alpha-chymotrypsinogen A (bovine pancreas), myoglobin (horse heart) and carbonic anhydrase II (bovine erythrocytes). The presence of carrier ampholytes in the entire capillary and the adsorption of carrier ampholytes onto the capillary wall almost eliminate the electroosmotic flow in the fused-silica capillary, obviating the need for polymer additives such as methylcellulose and hydroxypropylmethylcellulose. In fact, the electroosmotic displacement of focused protein zones can only be achieved by injecting a mixture of proteins and ampholytes as a plug at the inlet of a capillary that has been pre-filled with the catholyte. Various approaches for protein mobilization in the uncoated capillary completely filled with carrier ampholytes are studied. The addition of methylcellulose to the sample mixture of carrier ampholytes and protein analytes serves as an anticonvective medium during the gravity mobilization step and contributes to the reduction of protein adsorption onto the capillary wall. (C) 1997 Elsevier Science B.V. C1 IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV,US DOE,AMES LAB,AMES,IA 50011. NR 10 TC 18 Z9 18 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 SEP 26 PY 1997 VL 781 IS 1-2 BP 113 EP 118 DI 10.1016/S0021-9673(97)00608-0 PG 6 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA YC198 UT WOS:A1997YC19800015 PM 9368382 ER PT J AU Kim, Y Yeung, ES AF Kim, Y Yeung, ES TI Separation of DNA sequencing fragments up to 1000 bases by using poly(ethylene oxide)-filled capillary electrophoresis SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article; Proceedings Paper CT 9th International Symposium on High Performance Capillary Electrophoresis and Related Microscale Techniques CY JAN 26-30, 1997 CL ORLANDO, FL DE poly(ethylene oxide) gels; capillary columns; DNA ID LASER-INDUCED FLUORESCENCE; REPLACEABLE LINEAR POLYACRYLAMIDE; GEL-ELECTROPHORESIS; HIGH-SPEED; PULSED-FIELD; RESTRICTION FRAGMENTS; OXIDE) SOLUTIONS; TEMPERATURE; MOBILITIES; STANDARD AB We have demonstrated that DNA bases up to 1000 base pairs (bp) in a sequencing ladder can be separated using poly(ethylene oxide)-filled capillary electrophoresis (resolution of raw data = 0.5 at 966 bp). Separation performance of this sieving matrix has been tested under different experimental conditions. It was found that the electric field strength played a critical role in the onset of reptation and thus the separation efficiency. Optimized gel composition and concentration is required for good separation, but the total gel concentration should lie between 2.5 and 3.0%. We observed that the capillary length influences the number of theoretical plates and the maximum readable length of DNA. For sequencing up to 500 bp, relatively nonviscous solutions can be used, greatly facilitating the replacement of the sieving matrix in between runs. (C) 1997 Elsevier Science B.V. C1 IOWA STATE UNIV,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. FU NHGRI NIH HHS [HG-01385] NR 43 TC 83 Z9 85 U1 1 U2 6 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 SEP 26 PY 1997 VL 781 IS 1-2 BP 315 EP 325 DI 10.1016/S0021-9673(97)00472-X PG 11 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA YC198 UT WOS:A1997YC19800035 PM 9368394 ER PT J AU Catasti, P Chen, X Deaven, LL Moyzis, RK Bradbury, EM Gupta, G AF Catasti, P Chen, X Deaven, LL Moyzis, RK Bradbury, EM Gupta, G TI Cytosine-rich strands of the insulin minisatellite adopt hairpins with intercalated cytosine(+)center dot cytosine pairs SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE hairpin i-motif; insulin minisatellite; NMR spectroscopy; slippage/length polymorphism ID LINKED POLYMORPHIC REGION; CRYSTAL-STRUCTURE; I-MOTIF; DNA-STRUCTURE; GENE; LOCUS; SUSCEPTIBILITY; EXPRESSION; SEQUENCES; TRACTS AB Previously, we reported the high resolution NMR structure of the hairpin G-quartet structure formed by the G-rich strand of the insulin minisatellite of repeat sequence, ((ACAG4TGTG4)(TGTC4ACAC4)) located upstream of the human insulin gene. Here, we report structural studies on the C-rich strand of this insulin minisatellite. First, we Show by high resolution NMR that (C(4)TGTC(4)) forms a hairpin dimer with intercalated C+. C pairs (referred to as the hairpin i-motif); 340 NOE distance constraints uniquely define the nature of hairpin folding and the pattern of C+. C intercalation. Second, we show by one-dimensional NMR spectroscopy and molecular modeling studies that (C(4)TGTC(4)ACA(4)TGTC(4)) forms an intramolecularly folded hairpin with intercalated C+. C pairs. Third, we demonstrate by in vitro replication studies that several such hairpin i-motifs are present in long (C(4)TGTC(4)ACA)(n) (n greater than or equal to 6) sequences, even in the presence of their complementary strands. Finally, we discuss structural and biological significance of the hairpin i-motifs formed by the C-rich strands of the insulin minisatellite. (C) 1997 Academic Press Limited. C1 LOS ALAMOS NATL LAB,LIFE SCI DIV,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87545. UNIV CALIF DAVIS,SCH MED,DEPT BIOL CHEM,DAVIS,CA 95616. NR 30 TC 48 Z9 48 U1 1 U2 9 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD SEP 26 PY 1997 VL 272 IS 3 BP 369 EP 382 DI 10.1006/jmbi.1997.1248 PG 14 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA XY531 UT WOS:A1997XY53100008 PM 9325097 ER PT J AU Feller, D Thompson, MA Kendall, RA AF Feller, D Thompson, MA Kendall, RA TI A theoretical case study of substituent effects and microsolvation on the binding specificity of crown ethers SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID MOLECULAR-ORBITAL METHODS; BASIS-SETS; AB-INITIO; CATION SELECTIVITY; 1ST-ROW ELEMENTS; FREE-ENERGY; 18-CROWN-6; DYNAMICS; WATER; CLUSTERS AB Hartree-Fock and second-order perturbation theory calculations were performed on complexes of a single alkali metal cation and a recently synthesized derivative of 18-crown-6 that locks the crown macrocycle into a D-3d-like configuration. Unlike 18-crown-6, which binds K+ with a 100-fold selectivity over Na+, the derivative prefers Na+ by a factor of 4:1. Calculations on a simple K+ <--> Na+ cation exchange reaction indicate a small shift in binding preference in favor of Na+, but the inherent uncertainty in the theoretical treatment makes an unequivocal conclusion difficult. The effects of two microsolvating waters attached to the cation/s18-crown-6 complex and up through four microsolvating waters bound to 18-crown-6 were considered. The levels of theory used in this study were similar to those previously found to yield binding preferences in qualitative agreement with Liquid-phase experimental data, ab the best of our knowledge, this work, which involved more than 800 basis functions for several complexes, represents the largest high-level ab initio study of crown ethers yet attempted. RP Feller, D (reprint author), PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 28 TC 35 Z9 36 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD SEP 25 PY 1997 VL 101 IS 39 BP 7292 EP 7298 DI 10.1021/jp971509s PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XX852 UT WOS:A1997XX85200015 ER PT J AU Brand, HV Redondo, A Hay, PJ AF Brand, HV Redondo, A Hay, PJ TI Theoretical studies of CO and NO adsorption on Cu+-ZSM-5 zeolite SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID COPPER IONS; IR INVESTIGATIONS; NITRIC-OXIDE; GASEOUS CUCL; BASIS-SETS; MODELS; PHOTOLUMINESCENCE; DECOMPOSITION; MOLECULES; CATALYSTS AB Molecular models of the form (H2O)(n) ... Cu+... X, where n = 1, 2, 3 and X = CO, 2(CO), NO, (NO)(2), and H2O are employed to investigate the catalytically active copper sites in Cu+-ZSM-5 zeolite. Structures, binding energies and vibrational frequencies are calculated for these molecular models by density functional theory with gradient-corrected functionals. The calculated vibrational frequencies are compared to experimental infrared spectra of CO and NO adsorbed in Cu+-ZSM-5 for each n value. The absence (presence) of an unpaired electron in the CO (NO) molecule is found to have effects in the structures, binding energies, and vibrational frequencies of the adsorbed species. Upon adsorption at a copper cation site, we find that, in agreement with experiment, (1) the stretching frequency of CO undergoes a small blue shift whereas that of NO is red shifted; (2) the formation of adsorbed dicarbonyl species is not as favored as the formation of adsorbed dinitrosyl species; and (3) the frequency separation between the antisymmetric and symmetric stretching modes is much smaller in the dicarbonyl species than in the dinitrosyl species. The choice of gradient-corrected functionals and the basis set used in this study is found to reproduce accurately the successive binding energies of (H2O)(n) ... Cu+ when three or more Ligands to the copper cation are present. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 36 TC 45 Z9 47 U1 1 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5647 J9 J PHYS CHEM B JI J. Phys. Chem. B PD SEP 25 PY 1997 VL 101 IS 39 BP 7691 EP 7701 DI 10.1021/jp963327o PG 11 WC Chemistry, Physical SC Chemistry GA XX853 UT WOS:A1997XX85300004 ER PT J AU Lu, YF Ganguli, R Drewien, CA Anderson, MT Brinker, CJ Gong, WL Guo, YX Soyez, H Dunn, B Huang, MH Zink, JI AF Lu, YF Ganguli, R Drewien, CA Anderson, MT Brinker, CJ Gong, WL Guo, YX Soyez, H Dunn, B Huang, MH Zink, JI TI Continuous formation of supported cubic and hexagonal mesoporous films by sol gel dip-coating SO NATURE LA English DT Article ID SILICA; INTERFACES; WATER; MICA AB Thin films of surfactant-templated mesoporous materials(1,2) could find applications in membrane-based separations, selective catalysis and sensors. Above the critical micelle concentration of a bulk silica-surfactant solution, films of mesophases with hexagonally packed one-dimensional channels can be formed at solid-liquid and liquid-vapour interfaces(3-5). But this process is slow and the supported films(3,5) are granular and with the pore channels oriented parallel to the substrate surface, so that transport across the films is not facilitated by the pores. Ogawa(6,7) has reported a rapid spin-coating procedure for making transparent mesoporous films, but their formation mechanism, microstructure and pore accessibility have not been elucidated. Here we report a sol-gel-based dip-coating method for the rapid synthesis of continuous mesoporous thin films on a solid substrate. The influence of the substrate generates film mesostructures that have no bulk counterparts, such as composites with incipient liquid-crystalline order of the surfactant-silica phase. We are also able to form mesoporous films of the cubic phase, in which the pores are connected in a three-dimensional network that guarantees their accessibility from the film surface. We demonstrate and quantify this accessibility using a surface-acoustic-wave nitrogen-adsorption technique. We use fluorescence depolarization to monitor the evolution of the mesophase in situ, and see a progression through a sequence of lamellar to cubic to hexagonal structures that has not previously been reported. C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87106 USA. UNIV NEW MEXICO, NSF, CTR MICROENGINEERED MAT, ALBUQUERQUE, NM 87106 USA. UNIV NEW MEXICO, DEPT EARTH & PLANETARY SCI, ALBUQUERQUE, NM 87106 USA. UNIV CALIF LOS ANGELES, DEPT MAT SCI, LOS ANGELES, CA 90095 USA. UNIV CALIF LOS ANGELES, DEPT CHEM, LOS ANGELES, CA 90095 USA. NR 24 TC 1233 Z9 1267 U1 44 U2 518 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD SEP 25 PY 1997 VL 389 IS 6649 BP 364 EP 368 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XX675 UT WOS:A1997XX67500047 ER PT J AU Cooper, AI Londono, JD Wignall, G McClain, JB Samulski, ET Lin, JS Dobrynin, A Rubinstein, M Burke, ALC Frechet, JMJ DeSimone, JM AF Cooper, AI Londono, JD Wignall, G McClain, JB Samulski, ET Lin, JS Dobrynin, A Rubinstein, M Burke, ALC Frechet, JMJ DeSimone, JM TI Extraction of a hydrophilic compound from water into liquid CO2 using dendritic surfactants SO NATURE LA English DT Article ID SUPERCRITICAL CARBON-DIOXIDE; ANGLE X-RAY; DISPERSION POLYMERIZATIONS; NEUTRON-SCATTERING; DENDRIMERS; MICELLES; POLYMERS; POLARITY; ENERGY AB Dendrimers are well defined, highly branched polymers(1-5) that adopt a roughly spherical, globular shape in solution, Their cores are relatively loosely packed and can trap guest molecules(5-7), and by appropriate functionalization of the branch tips the macromolecules can act as unimolecular micelle-like entities(6). Here we show that dendrimers with a fluorinated shell are soluble in liquid carbon dioxide and can transport CO2-insoluble molecules into this solvent within their cores. Specifically, we demonstrate the extraction of a polar ionic dye, methyl orange, from water into CO2 using these fluorinated dendrimers. This observation suggests possible uses of such macromolecules for the remediation of contaminated water, the extraction of pharmaceutical products from fermentation vessels, the selective encapsulation of drugs for targeted delivery(6,7) and the transport of reagents for chemical reactions (such as polymerization(8-11)) in liquid and supercritical CO2 solvents. C1 UNIV N CAROLINA,DEPT CHEM,VENABLE & KENAN LABS,CHAPEL HILL,NC 27514. OAK RIDGE NATL LAB,OAK RIDGE,TN. UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Dobrynin, Andrey/B-9472-2013; Cooper, Andrew/D-9662-2011; OI Dobrynin, Andrey/0000-0002-6484-7409; Frechet, Jean /0000-0001-6419-0163 NR 29 TC 275 Z9 282 U1 7 U2 55 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD SEP 25 PY 1997 VL 389 IS 6649 BP 368 EP 371 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XX675 UT WOS:A1997XX67500048 ER PT J AU Cheng, HC AF Cheng, HC TI Supersymmetric dynamical generation of the grand unification scale SO PHYSICS LETTERS B LA English DT Article ID LIGHT HIGGS DOUBLETS; UNIFIED THEORIES; SUPERSTRING MODELS; SYMMETRY-BREAKING; COMPACTIFICATION; ELECTROWEAK AB The grand unification scale M-GUT similar to 10(16) GeV may arise from dynamical effects. With the advances in understanding of supersymmetric dynamics, we show how the grand unified group may be broken dynamically by a strong gauge group with a dynamical scale similar to 10(16) GeV. We also show how this mechanism can be combined with solutions to the doublet-triplet splitting problem. The same method could also be used for other symmetry breakings at intermediate scales as well. (C) 1997 Elsevier Science B.V. RP FERMILAB NATL ACCELERATOR LAB, POB 500, BATAVIA, IL 60510 USA. NR 30 TC 12 Z9 12 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD SEP 25 PY 1997 VL 410 IS 1 BP 45 EP 51 DI 10.1016/S0370-2693(97)00924-6 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YC778 UT WOS:A1997YC77800007 ER PT J AU Vaughey, JT Corbett, JD AF Vaughey, JT Corbett, JD TI Na5Sn13: A new zintl phase with a complex network structure constructed from tin pentagons SO INORGANIC CHEMISTRY LA English DT Article AB The compound Na5Sn13 forms in the sodium-tin system in high yield following prolonged reaction of a quenched mixture at 280 degrees C: in a Ta container. The compound exhibits a complex three-dimensional structure (29 independent atoms) built mainly of 4-bonded tin atoms In interbonded pentagons (orthorhombic, space group Cmcm (No. 63); a = 8.979(1) Angstrom, b = 19.448(6) Angstrom, c = 50.43(2) Angstrom, Z = 16). According to Zintl-Klemm electron-counting formalisms, the compound has a closed-shell electronic configuration with the number of 3-bonded Sn- equal to the number of sodium cations. Property measurements show that the compound is diamagnetic. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. OI Vaughey, John/0000-0002-2556-6129 NR 23 TC 24 Z9 24 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD SEP 24 PY 1997 VL 36 IS 20 BP 4316 EP 4320 DI 10.1021/ic9703181 PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA XY361 UT WOS:A1997XY36100007 ER PT J AU Fino, SA Benwitz, KA Sullivan, KM LaMar, DL Stroup, KM Giles, SM Balaich, GJ Chamberlin, RM Abney, KD AF Fino, SA Benwitz, KA Sullivan, KM LaMar, DL Stroup, KM Giles, SM Balaich, GJ Chamberlin, RM Abney, KD TI Condensation polymerization of cobalt dicarbollide dicarboxylic acid SO INORGANIC CHEMISTRY LA English DT Article ID RING-OPENING POLYMERIZATION; METAL-BASED POLYMERS; EXTRACTION; METALLOCENOPHANES; CESIUM; ROUTE C1 USAF ACAD, DEPT CHEM, CHEM RES CTR, COLORADO SPRINGS, CO 80840 USA. Los Alamos Natl Lab, Nucl & Radiochem Grp, Los Alamos, NM 87545 USA. RI Chamberlin, Rebecca/A-1335-2011 OI Chamberlin, Rebecca/0000-0001-6468-7778 NR 25 TC 10 Z9 10 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 EI 1520-510X J9 INORG CHEM JI Inorg. Chem. PD SEP 24 PY 1997 VL 36 IS 20 BP 4604 EP 4606 DI 10.1021/ic961182u PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA XY361 UT WOS:A1997XY36100049 ER PT J AU Vosegaard, T Larsen, FH Jakobsen, HJ Ellis, PD Nielsen, NC AF Vosegaard, T Larsen, FH Jakobsen, HJ Ellis, PD Nielsen, NC TI Sensitivity-enhanced multiple-quantum MAS NMR of half-integer quadrupolar nuclei SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ANGLE-SPINNING NMR; SOLID-STATE NMR; DOUBLE-ROTOR; SPECTROSCOPY; AL-27 C1 AARHUS UNIV, DEPT CHEM, INSTRUMENT CTR SOLID STATE NMR SPECT, DK-8000 AARHUS C, DENMARK. PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. RI Larsen, Flemming/A-5255-2015 OI Larsen, Flemming/0000-0001-5180-6870 NR 31 TC 58 Z9 59 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD SEP 24 PY 1997 VL 119 IS 38 BP 9055 EP 9056 DI 10.1021/ja971355u PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XX820 UT WOS:A1997XX82000039 ER PT J AU Laursen, T Chandrasekhar, D Smith, DJ Mayer, JW Huffman, J Westhoff, R Robinson, M AF Laursen, T Chandrasekhar, D Smith, DJ Mayer, JW Huffman, J Westhoff, R Robinson, M TI Crystalline-to-amorphous transition in chemical vapor deposition of pseudomorphic Si1-x-yGexCy films SO APPLIED PHYSICS LETTERS LA English DT Article ID SOLID-PHASE EPITAXY; CARBON AB Pseudomorphic SiGeC films have been grown on (100) Si by atmospheric pressure chemical vapor deposition at 600 and 700 degrees C using SiH2Cl2, GeH4, and C2H4 precursors. Films with C concentrations of up to 2.5 at. % were entirely pseudomorphic and a 120-nm-thick Si66.5Ge31C2.5 film had 90% substitutional carbon. With increasing C incorporation due to increased ethylene flow, a layered structure was formed consisting of an amorphous film overlaying a buried pseudomorphic film. The crystalline-to-amorphous transition was initiated by the accumulation of C on the epitaxial growth surface. This deteriorated surface resulted in the formation of stacking faults along {111} planes and subsequent amorphization. Defect formation and amorphization could be prevented by periodically growing a thin Si epilayer. (C) 1997 American Institute of Physics. C1 LAWRENCE SEMICOND RES LAB INC,TEMPE,AZ 85282. ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287. RP Laursen, T (reprint author), ARIZONA STATE UNIV,CTR SOLID STATE SCI,TEMPE,AZ 85287, USA. NR 7 TC 8 Z9 8 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 22 PY 1997 VL 71 IS 12 BP 1634 EP 1636 DI 10.1063/1.120001 PG 3 WC Physics, Applied SC Physics GA XW907 UT WOS:A1997XW90700014 ER PT J AU Floro, JA Chason, E Lee, SR Petersen, GA AF Floro, JA Chason, E Lee, SR Petersen, GA TI Biaxial moduli of coherent Si1-xGex films on Si (001) SO APPLIED PHYSICS LETTERS LA English DT Article ID STRAIN; STRESS; RELAXATION; SI(001); GROWTH; LAYER; GE AB The biaxial moduli of coherently strained Si1-xGex thin films have been determined over the composition range x=0.15-0.6 from independent measurements of film stress and strain. Our results indicate that use of the rule of mixtures to determine the strained-alloy elastic constants from the bulk values for pure Si and Ge is valid, and that higher-order elastic effects are relatively unimportant over this composition range. (C) 1997 American Institute of Physics. RP Floro, JA (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 18 TC 13 Z9 13 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 22 PY 1997 VL 71 IS 12 BP 1694 EP 1696 DI 10.1063/1.120006 PG 3 WC Physics, Applied SC Physics GA XW907 UT WOS:A1997XW90700034 ER PT J AU Ren, ZF Wang, JH Miller, DJ AF Ren, ZF Wang, JH Miller, DJ TI Continuous control of the superconducting transition temperature from overdoped to underdoped regimes in tetragonal Tl2Ba2CuO6+delta thin films SO APPLIED PHYSICS LETTERS LA English DT Article ID NORMAL-STATE AB Epitaxial superconducting thin films Tl2Ba2CuO6+delta (Tl-2201) with a continuous range of doping levels have been synthesized. The films were made by rf magnetron sputtering and two-step postdeposition annealing, and their doping levels were controlled by varying the oxygen content through annealing in flowing argon. By annealing in flowing argon, the as-grown Tl-2201 thin films were changed continuously from the initially overdoped state, through the optimally doped state and then to the underdoped state. The normal state resistivity versus temperature curves of all the underdoped Tl-2201 thin films are convex, whereas those of the overdoped Tl-2201 thin films are all concave. Transmission electron microscopy bright-field images and selected area diffraction patterns of the 58 K underdoped Tl-2201 thin film showed neither twinning bands nor spot. splitting associated with an orthorhombic crystal lattice. Therefore, it is concluded that underdoped Tl-2201 thin films are also tetragonal just like all the overdoped and optimally doped Tl-2201 thin films. (C) 1997 American Institute of Physics. C1 SUNY BUFFALO,NEW YORK STATE INST SUPERCONDUCT,MAT SYNTH LAB,BUFFALO,NY 14260. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. RP Ren, ZF (reprint author), SUNY BUFFALO,DEPT CHEM,BUFFALO,NY 14260, USA. RI Ren, Zhifeng/B-4275-2014 NR 5 TC 16 Z9 16 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 22 PY 1997 VL 71 IS 12 BP 1706 EP 1708 DI 10.1063/1.120010 PG 3 WC Physics, Applied SC Physics GA XW907 UT WOS:A1997XW90700038 ER PT J AU Kalyanaraman, R Vispute, RD Oktyabrsky, S Dovidenko, K Jagannadham, K Narayan, J Budai, JD Parikh, N Suvkhanov, A AF Kalyanaraman, R Vispute, RD Oktyabrsky, S Dovidenko, K Jagannadham, K Narayan, J Budai, JD Parikh, N Suvkhanov, A TI Influence of oxygen background pressure on crystalline quality of SrTiO3 films grown on MgO by pulsed laser deposition SO APPLIED PHYSICS LETTERS LA English DT Article ID SUPERCONDUCTING THIN-FILMS AB We have systematically investigated the effect of oxygen partial pressure (Pot) On the crystalline quality of SrTiO3 films grown on MgO (001) substrates using pulsed laser deposition and established optimized conditions for the growth of high-quality epitaxial films. The crystalline quality is found to improve significantly in the O-2 pressure range of 0.5-1 mTorr, compared to the films deposited at higher pressures of 10-100 mTorr. The x-ray diffraction rocking curves for the films grown at PO2, of 1 mTorr and 100 mTorr yielded full width at half-maximum (FWHM) of 0.7 degrees and 1.4 degrees, respectively. The in-plane x-ray phi scans showed epitaxial cube-on-cube alignment of the films. Channeling yields chi(min) Were found to be <5% for the 1 mTorr films and similar to 14% for 100 mTorr films. Thermal annealing of the SrTiO3 films in oxygen further improves the quality, and the 1 mTorr films give FWHM of 0.13 degrees and chi(min) of 1.7%. In-plane misorientations of the annealed SrTiO3 films calculated using results of transmission electron microscopy are +/-0.7 degrees for 1 mTorr and +/-1.7 degrees for the 10 mTorr film. The high temperature superconducting (high-T-c) Y1Ba2Cu3O7-delta films grown on these SrTiO3/MgO substrates showed a chi(min) of 2.0% and transition temperature of similar to 92 K, indicating that SrTiO3 buffer layers on MgO can be used for growth of high-quality Y1Ba2Cu3O7-delta thin film heterostructures for use in high-T-c devices and next generation microelectronics devices requiring films with high dielectric constants. (C) 1997 American Institute of Physics. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV N CAROLINA,DEPT PHYS & ASTRON,CHAPEL HILL,NC 27599. RP Kalyanaraman, R (reprint author), N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,BOX 7907,RALEIGH,NC 27695, USA. RI Jagannadham, Kasichainula/A-2953-2008; Narayan, Jagdish/D-1874-2009; Budai, John/R-9276-2016; OI Budai, John/0000-0002-7444-1306; kalyanaraman, ramki/0000-0002-5340-029X NR 17 TC 22 Z9 22 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 22 PY 1997 VL 71 IS 12 BP 1709 EP 1711 DI 10.1063/1.120011 PG 3 WC Physics, Applied SC Physics GA XW907 UT WOS:A1997XW90700039 ER PT J AU Dantsker, E Froehlich, OM Tanaka, S Kouznetsov, K Clarke, J Lu, Z Matijasevic, V Char, K AF Dantsker, E Froehlich, OM Tanaka, S Kouznetsov, K Clarke, J Lu, Z Matijasevic, V Char, K TI High-T-c superconducting gradiometer with a long baseline asymmetric flux transformer SO APPLIED PHYSICS LETTERS LA English DT Article ID SQUID GRADIOMETER; DC SQUID; MAGNETOMETERS; PERFORMANCE; LAYER AB The planar gradiometer consists of a directly coupled magnetometer inductively coupled to the smaller loop of an asymmetric, two-loop flux transformer patterned in a single film of YBa2Cu3O7-x. The coupling is adjusted mechanically to balance the gradiometer to about 1 part in 3000 with respect to fields perpendicular to its plane. The baseline is 48 mm and the intrinsic balance with respect to in-plane fields about 1 part in 1400. When a magnetic field is applied solely to the magnetometer, its sensitivity is reduced by only 5% by the presence of the flux transformer. (C) 1997 American Institute of Physics. C1 UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY NATL LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. CONDUCTUS INC, SUNNYVALE, CA 94086 USA. NR 17 TC 33 Z9 33 U1 1 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 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 22 PY 1997 VL 71 IS 12 BP 1712 EP 1714 DI 10.1063/1.120012 PG 3 WC Physics, Applied SC Physics GA XW907 UT WOS:A1997XW90700040 ER PT J AU Jia, QX Reagor, D Mombourquette, C Fan, Y Decker, J DAlessandris, P AF Jia, QX Reagor, D Mombourquette, C Fan, Y Decker, J DAlessandris, P TI Stability of dc superconducting quantum interference devices fabricated using ramp-edge superconductor normal-metal superconductor technology SO APPLIED PHYSICS LETTERS LA English DT Article ID JOSEPHSON-JUNCTIONS; SQUIDS; MAGNETOMETER; YBA2CU3O7-X; BARRIER; LAYERS AB The degradation with time was determined for high-temperature superconducting quantum interference devices (SQUIDs) with ramp-edge geometry Josephson junctions (Ag:YBa2Cu3O7-x/PrBa2Cu3O7-x/A8:YBa2Cu3O7-x) The critical current of the devices tended to decrease with a mean percentage of less than 7% over a period of more than 500 days. The junction resistance, on the other hand, increased with a mean percentage of 5%. The voltage modulation of the SQUIDs was unchanged within experimental reproducibility, presumably due to the cancellation of the changes in critical current and resistance. (C) 1997 American Institute of Physics. C1 MONROE CTY COMMUNITY COLL,ROCHESTER,NY 14623. RP Jia, QX (reprint author), LOS ALAMOS NATL LAB,MAT SCI & TECHNOL DIV,MS G755,LOS ALAMOS,NM 87545, USA. RI Jia, Q. X./C-5194-2008 NR 13 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 22 PY 1997 VL 71 IS 12 BP 1721 EP 1723 DI 10.1063/1.120015 PG 3 WC Physics, Applied SC Physics GA XW907 UT WOS:A1997XW90700043 ER PT J AU Davis, MJ AF Davis, MJ TI Investigating intramolecular dynamics: Hierarchical analysis and the topography of energy flow SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR VIBRATIONAL-SPECTRA; VISIBLE EXCITATION SPECTRUM; PERIODIC ORBIT ANALYSIS; RANDOM-MATRIX TREATMENT; FERMI RESONANT SYSTEMS; JET-COOLED NO2; QUANTUM LOCALIZATION; EXCITED MOLECULES; BOUND-STATES; REDISTRIBUTION AB Methods for understanding the global nature of intramolecular dynamics are developed. A complete picture of the intramolecular dynamics is inferred from the detailed study of a small set of initially localized wave packets chosen from a much larger set. The smaller set is chosen based on a topographic map generated from the spectral decompositions of the wave packets in the larger set. The hierarchical decomposition of the wave packets in the smaller set is used to understand their often complicated dynamics. The combination of the topographic map and the hierarchical analysis, in conjunction with some other standard techniques, allows for a complete picture of the energy flow. (C) 1997 American Institute of Physics. RP Davis, MJ (reprint author), ARGONNE NATL LAB, DIV CHEM, 9700 S CASS AVE, ARGONNE, IL 60439 USA. NR 56 TC 9 Z9 9 U1 0 U2 0 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 SEP 22 PY 1997 VL 107 IS 12 BP 4507 EP 4521 DI 10.1063/1.474812 PG 15 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XX493 UT WOS:A1997XX49300007 ER PT J AU Chen, YJ Liao, CL Ng, CY AF Chen, YJ Liao, CL Ng, CY TI A molecular beam photoionization mass spectrometric study of Cr(CO)(6), Mo(CO)(6), and W(CO)(6) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID EXCIMER LASER PHOTOLYSIS; GAS-PHASE; WAVELENGTH DEPENDENCE; INFRARED-SPECTROSCOPY; BOND-ENERGIES; M(CO)(6) M=CR; DISSOCIATION; FE(CO)5; IONS; HEXACARBONYLS AB The photoionization efficiency (PIE) spectra for M(CO)(n)(+) (n = 0-6) from M(CO)(6), M = Cr, Mo, and W, have been measured in the photon energy range of 650-1600 Angstrom. Based on the ionization energies for M(CO)(6) and appearance energies (AEs) for M(CO)(n)(+) (n = 0-5) determined here, we have obtained estimates for the sequential bond dissociation energies (D-0) for CO-M(CO)(n-1)(+) (n = 1-6). The comparison between the D-0 values for the Cr(CO)(6)(+) system obtained here and in the recent collisional induced dissociation and theoretical studies suggests that D-0 values for CO-M(CO)(n-1)(+) (n = 3-6) based on this PIE experiment are reliable. The PIE results reveal the general trend for individual D-0 values that D-0[CO-Cr(CO)(n-1)(+)] < D-0[CO-Mo(CO)(n-1)(+)] < D-0[CO-W(CO)(n-1)(+)] (n = 3-6). The comparison of the first D-0 values for M(CO)(6)(+) obtained here and those for M(CO)(6) reported previously provides strong support for the theoretical analysis that the importance of relativistic effects, which give rise to more efficient M to CO pi-back-donation in M(CO)(6), is in the order W(CO)(6) > Mo(Co)(6) > Cr(CO)(6) (C) 1997 American Institute of Physics. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,US DOE,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RI Chen, Yu-Ju/E-9481-2015 NR 34 TC 10 Z9 10 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 22 PY 1997 VL 107 IS 12 BP 4527 EP 4536 DI 10.1063/1.474814 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XX493 UT WOS:A1997XX49300009 ER PT J AU Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, B Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI Lancaster, M LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartarelli, F Tylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R ThurmanKeup, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyoda, H Trischuk, W deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wenzel, H Wester, WC Wicklund, AB Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S AF Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, B Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI Lancaster, M LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartarelli, F Tylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R ThurmanKeup, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyoda, H Trischuk, W deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wenzel, H Wester, WC Wicklund, AB Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S TI Search for new gauge bosons decaying into dileptons in (p)over-bar-p collisions at root s=1.8 TeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID INSPIRED E6 MODELS AB We have searched for heavy neutral gauge bosons (Z') in dielectron and dimuon decay modes using 110 pb(-1) of (p) over bar p collisions at root s = 1.8 TeV collected with the Collider Detector at Fermilab. We. present a limit on the production cross section times branching ratio of a Z' boson decaying into dileptons as a function of Z' mass. For mass M-Z' > 600 GeV/c(2), the upper limit is 40 fb at 95% confidence level. We set the lower mass limits of 690, 590, 620, 595, 565, 630, and 600 GeV/c(2) forZ(SM)(l), Z(psi), Z(eta), Z(X), Z(l), Z(LR), and Z(ALRM), respectively. C1 UNIV BOLOGNA,IST NAZL FIS NUCL,I-40127 BOLOGNA,ITALY. BRANDEIS UNIV,WALTHAM,MA 02264. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60638. DUKE UNIV,DURHAM,NC 28708. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV FLORIDA,GAINESVILLE,FL 33611. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV GENEVA,CH-1211 GENEVA 4,SWITZERLAND. HARVARD UNIV,CAMBRIDGE,MA 02138. HIROSHIMA UNIV,HIGASHIHIROSHIMA 724,JAPAN. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV KARLSRUHE,D-76128 KARLSRUHE,GERMANY. NATL LAB HIGH ENERGY PHYS,KEK,TSUKUBA,IBARAKI 315,JAPAN. ERNEST ORLANDO LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87132. OHIO STATE UNIV,COLUMBUS,OH 43320. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,SEZIONE PADOVA,I-36132 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15270. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14628. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11530,TAIWAN. TEXAS A&M UNIV,COLLEGE STN,TX 77843. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 315,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53806. YALE UNIV,NEW HAVEN,CT 06511. RP Abe, F (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014; Introzzi, Gianluca/K-2497-2015 OI Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580 NR 30 TC 159 Z9 159 U1 0 U2 4 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 SEP 22 PY 1997 VL 79 IS 12 BP 2192 EP 2197 DI 10.1103/PhysRevLett.79.2192 PG 6 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900009 ER PT J AU Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bettelli, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chan, KM Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Hong, S Honk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI Lancaster, M Lanzoni, M Latino, G LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartaralli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R ThurmanKeup, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyoda, H Trischuk, W deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S AF Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bettelli, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chan, KM Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Hong, S Honk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI Lancaster, M Lanzoni, M Latino, G LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, JB Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartaralli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R ThurmanKeup, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyoda, H Trischuk, W deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, MJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S TI Limits on quark-lepton compositeness scales from dileptons produced in 1.8 TeV p(p)over-bar collisions SO PHYSICAL REVIEW LETTERS LA English DT Article ID PARTON DISTRIBUTIONS; CONTACT INTERACTION; PBARP COLLISIONS; ROOT-S=1.8 TEV AB The dilepton mass spectrum in p (p) over bar --> l(+)l(-) + X interactions is studied using dielectrons (ee) and dimuons (mu mu) in 110 pb(-1) of data collected with the Collider Detector at Fermilab. The data are consistent with standard model predictions. The mass spectrum, being a probe for new physics, is examined for new interactions of quarks and leptons from a common composite structure. Assuming a contact interaction with the conventional coupling g(0)(2)/4 pi = 1 limits on chiral quark-electron and quark-muon compositeness scales in the range of 2.5 to 4.2 TeV are obtained. C1 UNIV BOLOGNA,IST NAZL FIS NUCL,I-40127 BOLOGNA,ITALY. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90095. UNIV CHICAGO,CHICAGO,IL 60637. DUKE UNIV,DURHAM,NC 27708. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV FLORIDA,GAINESVILLE,FL 32611. IST NAZL FIS NUCL,NAZL FRASCATI LAB,I-00044 FRASCATI,ITALY. UNIV GENEVA,CH-1211 GENEVA 4,SWITZERLAND. HARVARD UNIV,CAMBRIDGE 02138,ENGLAND. HIROSHIMA UNIV,HIGASHIHIROSHIMA 739,JAPAN. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV KARLSRUHE,INST EXPT KERNPHYS,D-76128 KARLSRUHE,GERMANY. NATL LAB HIGH ENERGY PHYS,KEK,TSUKUBA,IBARAKI 305,JAPAN. ERNEST ORLANDO LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. OHIO STATE UNIV,COLUMBUS,OH 43210. OSAKA CITY UNIV,OSAKA 558,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,SEZINE PADOVA,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15260. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08855. ACAD SINICA,TAIPEI 11529,TAIWAN. TEXAS A&M UNIV,COLLEGE STN,TX 77843. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. RP Abe, F (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Introzzi, Gianluca/K-2497-2015; Lancaster, Mark/C-1693-2008; Vucinic, Dejan/C-2406-2008; Peters, Michael/B-4973-2009; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014; OI Introzzi, Gianluca/0000-0002-1314-2580; Gallinaro, Michele/0000-0003-1261-2277; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787; Turini, Nicola/0000-0002-9395-5230 NR 20 TC 86 Z9 86 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 SEP 22 PY 1997 VL 79 IS 12 BP 2198 EP 2203 DI 10.1103/PhysRevLett.79.2198 PG 6 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900010 ER PT J AU Adler, S Atiya, MS Chiang, IH Diwan, MV Frank, JS Haggerty, JS Kettell, SH Kycia, TF Li, KK Littenberg, LS Ng, C Sambamurti, A Stevens, A Strand, RC Witzig, C Komatsubara, TK Kuriki, M Muramatsu, N Sugimoto, S Inagaki, T Kabe, S Kobayashi, M Kuno, Y Sato, T Shinkawa, T Yoshimura, Y Kishi, Y Nakano, T Ardebili, M Bazarko, AO Convery, MR Ito, MM Marlow, DR McPherson, RA Meyers, PD Shoemaker, FC Smith, AJS Stone, JR Aoki, M Blackmore, EW Bergbusch, PC Bryman, DA Konaka, A Macdonald, JA Mildenberger, J Numao, T Padley, P Poutissou, JM Poutissou, R Redlinger, G Roy, J Turcot, AS Kitching, P Soluk, R AF Adler, S Atiya, MS Chiang, IH Diwan, MV Frank, JS Haggerty, JS Kettell, SH Kycia, TF Li, KK Littenberg, LS Ng, C Sambamurti, A Stevens, A Strand, RC Witzig, C Komatsubara, TK Kuriki, M Muramatsu, N Sugimoto, S Inagaki, T Kabe, S Kobayashi, M Kuno, Y Sato, T Shinkawa, T Yoshimura, Y Kishi, Y Nakano, T Ardebili, M Bazarko, AO Convery, MR Ito, MM Marlow, DR McPherson, RA Meyers, PD Shoemaker, FC Smith, AJS Stone, JR Aoki, M Blackmore, EW Bergbusch, PC Bryman, DA Konaka, A Macdonald, JA Mildenberger, J Numao, T Padley, P Poutissou, JM Poutissou, R Redlinger, G Roy, J Turcot, AS Kitching, P Soluk, R TI Evidence for the decay K+->pi(+)nu(nu)over-bar SO PHYSICAL REVIEW LETTERS LA English DT Article ID RARE KAON DECAYS; LONG-DISTANCE CONTRIBUTION; LEADING LOGARITHMS; DETECTOR; SEARCH AB An event consistent with the signature expected for the rare kaon decay K+ --> pi(+) nu<(nu)over bar> has been observed. In the pion momentum region examined, 211 < P < 230 MeV/c, the backgrounds are estimated to contribute 0.08 +/- 0.03 events. If the event is due to K+ --> pi(+) nu<(nu)over bar>, the branching ratio is 4.2(-3.5)(+9.7) X 10(-10). C1 HIGH ENERGY ACCELERATOR RES ORG,KEK,TANASHI,TOKYO 188,JAPAN. HIGH ENERGY ACCELERATOR RES ORG,KEK,TSUKUBA,IBARAKI 305,JAPAN. OSAKA UNIV,DEPT PHYS,TOYONAKA,OSAKA 560,JAPAN. PRINCETON UNIV,JOSEPH HENRY LABS,PRINCETON,NJ 08544. TRIUMF,VANCOUVER,BC V6T 2A3,CANADA. UNIV ALBERTA,CTR SUBATOM RES,EDMONTON,AB T6G 2N5,CANADA. RP Adler, S (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Marlow, Daniel/C-9132-2014 NR 24 TC 149 Z9 149 U1 1 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 SEP 22 PY 1997 VL 79 IS 12 BP 2204 EP 2207 DI 10.1103/PhysRevLett.79.2204 PG 4 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900011 ER PT J AU Athanas, M Avery, P Jones, CD Lohner, M Prescott, C Yelton, J Zheng, J Brandenburg, G Briere, RA Ershov, A Gao, YS Kim, DYJ Wilson, R Yamamoto, H Browder, TE Li, F Li, Y Rodriguez, JL Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Selen, M Thaler, JJ Edwards, KW Bellerive, A Janicek, R MacFarlane, DB Patel, PM Sadoff, AJ Ammar, R Baringer, P Bean, A Besson, D Coppage, D Darling, C Davis, R Hancock, N Kotov, S Kravchenko, I Kwak, N Anderson, S Kubota, Y Lee, SJ ONeill, JJ Patton, S Poling, R Riehle, T Savinov, V Smith, A Alam, MS Athar, SB Ling, Z Mahmood, AH Severini, H Timm, S Wappler, F Anastassov, A Blinov, S Duboscq, JE Fujino, D Gan, KK Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, MB Sung, M Undrus, A Wanke, R Wolf, A Zoeller, MM Nemati, B Richichi, SJ Ross, WR Skubic, P Bishai, M Fast, J Gerndt, E Hinson, JW Menon, N Miller, DH Shibata, EI Shipsey, IPJ Yurko, M Gibbons, L Glenn, S Johnson, SD Kwon, Y Roberts, S Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Ugolini, D Wang, R Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Shelkov, V Staeck, J Stroynowski, R Volobouev, I Ye, J Artuso, M Efimov, A Gao, M Goldberg, M He, D Kopp, S Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Viehhauser, G Xing, X Bartelt, J Csorna, SE Jain, V McLean, KW Marka, S Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Zhou, GJ Barish, B Chadha, M Chan, S Eigen, G Miller, JS OGrady, C Schmidtler, M Urheim, J Weinstein, AJ Wurthwein, F Bliss, DW Masek, G Paar, HP Prell, S Sharma, V Asner, DM Gronberg, J Hill, TS Kutschke, R Lange, DJ Menary, S Morrison, RJ Nelson, HN Nelson, TK Qiao, C Richman, JD Roberts, D Ryd, A Witherell, MS Balest, R Behrens, BH Ford, WT Park, H Roy, J Smith, JG Alexander, JP Bebek, C Berger, BE Berkelman, K Bloom, K Cassel, DG Cho, HA Coffman, DM Crowcroft, DS Dickson, M Drell, PS Ecklund, KM Ehrlich, R Foland, AD Gaidarev, P Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hopman, PI Kandaswamy, J Kim, PC Kreinick, DL Lee, T Liu, Y Ludwig, GS Masui, J Mevissen, J Mistry, NB Ng, CR Nordberg, E Ogg, M Patterson, JR Peterson, D Riley, D Soffer, A ValantSpaight, B Ward, C AF Athanas, M Avery, P Jones, CD Lohner, M Prescott, C Yelton, J Zheng, J Brandenburg, G Briere, RA Ershov, A Gao, YS Kim, DYJ Wilson, R Yamamoto, H Browder, TE Li, F Li, Y Rodriguez, JL Bergfeld, T Eisenstein, BI Ernst, J Gladding, GE Gollin, GD Hans, RM Johnson, E Karliner, I Marsh, MA Palmer, M Selen, M Thaler, JJ Edwards, KW Bellerive, A Janicek, R MacFarlane, DB Patel, PM Sadoff, AJ Ammar, R Baringer, P Bean, A Besson, D Coppage, D Darling, C Davis, R Hancock, N Kotov, S Kravchenko, I Kwak, N Anderson, S Kubota, Y Lee, SJ ONeill, JJ Patton, S Poling, R Riehle, T Savinov, V Smith, A Alam, MS Athar, SB Ling, Z Mahmood, AH Severini, H Timm, S Wappler, F Anastassov, A Blinov, S Duboscq, JE Fujino, D Gan, KK Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, MB Sung, M Undrus, A Wanke, R Wolf, A Zoeller, MM Nemati, B Richichi, SJ Ross, WR Skubic, P Bishai, M Fast, J Gerndt, E Hinson, JW Menon, N Miller, DH Shibata, EI Shipsey, IPJ Yurko, M Gibbons, L Glenn, S Johnson, SD Kwon, Y Roberts, S Thorndike, EH Jessop, CP Lingel, K Marsiske, H Perl, ML Ugolini, D Wang, R Zhou, X Coan, TE Fadeyev, V Korolkov, I Maravin, Y Narsky, I Shelkov, V Staeck, J Stroynowski, R Volobouev, I Ye, J Artuso, M Efimov, A Gao, M Goldberg, M He, D Kopp, S Moneti, GC Mountain, R Schuh, S Skwarnicki, T Stone, S Viehhauser, G Xing, X Bartelt, J Csorna, SE Jain, V McLean, KW Marka, S Godang, R Kinoshita, K Lai, IC Pomianowski, P Schrenk, S Bonvicini, G Cinabro, D Greene, R Perera, LP Zhou, GJ Barish, B Chadha, M Chan, S Eigen, G Miller, JS OGrady, C Schmidtler, M Urheim, J Weinstein, AJ Wurthwein, F Bliss, DW Masek, G Paar, HP Prell, S Sharma, V Asner, DM Gronberg, J Hill, TS Kutschke, R Lange, DJ Menary, S Morrison, RJ Nelson, HN Nelson, TK Qiao, C Richman, JD Roberts, D Ryd, A Witherell, MS Balest, R Behrens, BH Ford, WT Park, H Roy, J Smith, JG Alexander, JP Bebek, C Berger, BE Berkelman, K Bloom, K Cassel, DG Cho, HA Coffman, DM Crowcroft, DS Dickson, M Drell, PS Ecklund, KM Ehrlich, R Foland, AD Gaidarev, P Gittelman, B Gray, SW Hartill, DL Heltsley, BK Hopman, PI Kandaswamy, J Kim, PC Kreinick, DL Lee, T Liu, Y Ludwig, GS Masui, J Mevissen, J Mistry, NB Ng, CR Nordberg, E Ogg, M Patterson, JR Peterson, D Riley, D Soffer, A ValantSpaight, B Ward, C TI Measurement of the (B)over-bar->Dl(nu)over-bar partial width and form factor parameters SO PHYSICAL REVIEW LETTERS LA English DT Article ID CB-VERTICAL-BAR; MODEL-INDEPENDENT EXTRACTION; EFFECTIVE FIELD-THEORY; SEMILEPTONIC DECAYS; HEAVY MESONS; QUARK-MODEL AB We have studied the decay (B) over bar --> Dl<(nu)over bar>, where I = e or mu. From a fit to the differential decay rate d Gamma/dw we measure the rate normalization F-D (1)\V-cb\ and form factor slope <(rho)over cap>(2)(D), and, using measured values of tau(B), find Gamma(B --> Dl<(nu)over bar>) = (12.0 +/- 0.9 +/- 2.1) ns(-1). The resulting branching fractions are B((B) over bar(0) --> D(+)l(-)<(nu)over bar>) = (1.87 +/- 0.15 +/- 0.32)% and B(B- --> D(0)l(-)<(nu)over bar>) = (1.94 +/- 0.15 +/- 0.34)%. The form factor parameters are in agreement with those measured in B --> D*l<(nu)over bar> decays, as predicted by heavy quark effective theory. C1 HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV HAWAII MANOA,HONOLULU,HI 96822. UNIV ILLINOIS,CHAMPAIGN,IL 61801. CARLETON UNIV,OTTAWA,ON K1S 5B6,CANADA. INST PARTICLE PHYS,OTTAWA,ON,CANADA. MCGILL UNIV,MONTREAL,PQ H3A 2T8,CANADA. INST PARTICLE PHYS,MONTREAL,PQ,CANADA. ITHACA COLL,ITHACA,NY 14850. UNIV KANSAS,LAWRENCE,KS 66045. UNIV MINNESOTA,MINNEAPOLIS,MN 55455. SUNY ALBANY,ALBANY,NY 12222. OHIO STATE UNIV,COLUMBUS,OH 43210. UNIV OKLAHOMA,NORMAN,OK 73019. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. SO METHODIST UNIV,DALLAS,TX 75275. SYRACUSE UNIV,SYRACUSE,NY 13244. VANDERBILT UNIV,NASHVILLE,TN 37235. VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061. WAYNE STATE UNIV,DETROIT,MI 48202. CALTECH,PASADENA,CA 91125. UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106. UNIV COLORADO,BOULDER,CO 80309. CORNELL UNIV,ITHACA,NY 14853. RP Athanas, M (reprint author), UNIV FLORIDA,GAINESVILLE,FL 32611, USA. RI Briere, Roy/N-7819-2014 OI Briere, Roy/0000-0001-5229-1039 NR 33 TC 25 Z9 25 U1 1 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 SEP 22 PY 1997 VL 79 IS 12 BP 2208 EP 2212 DI 10.1103/PhysRevLett.79.2208 PG 5 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900012 ER PT J AU Chen, S Sreenivasan, KR Nelkin, M Cao, NZ AF Chen, S Sreenivasan, KR Nelkin, M Cao, NZ TI Refined similarity hypothesis for transverse structure functions in fluid turbulence SO PHYSICAL REVIEW LETTERS LA English DT Article ID FULLY-DEVELOPED TURBULENCE; HOMOGENEOUS TURBULENCE; VELOCITY INCREMENTS; SCALING LAWS; KOLMOGOROV; DISSIPATION; CIRCULATION AB We argue on the basis of empirical data that Kolmogorov's refined similarity hypothesis (RSH) needs to be modified for transverse velocity increments, and propose an alternative. In this new form, transverse velocity increments bear the same relation to locally averaged enstrophy (squared vorticity) as longitudinal velocity increments bear in RSH to locally averaged dissipation. We support this hypothesis by analyzing high-resolution numerical simulation data for isotropic turbulence. RSH and its proposed modification for transverse velocity increments appear to represent two independent scaling groups. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. YALE UNIV,MASON LAB,NEW HAVEN,CT 06520. NYU,DEPT PHYS,NEW YORK,NY 10003. CUNY CITY COLL,LEVICH INST,NEW YORK,NY 10031. RP Chen, S (reprint author), IBM CORP,DIV RES,TJ WATSON RES CTR,POB 218,YORKTOWN HTS,NY 10598, USA. RI Chen, Shiyi/A-3234-2010 NR 36 TC 76 Z9 79 U1 0 U2 0 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 SEP 22 PY 1997 VL 79 IS 12 BP 2253 EP 2256 DI 10.1103/PhysRevLett.79.2253 PG 4 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900023 ER PT J AU Liu, YM Ecke, RE AF Liu, YM Ecke, RE TI Heat transport scaling in turbulent Rayleigh-Benard convection: Effects of rotation and prandtl number SO PHYSICAL REVIEW LETTERS LA English DT Article ID LAYER AB We report experimental measurements of turbulent heat transport in rotating Rayleigh-Benard convection. The fluid was water with Prandtl number 3 < sigma < 7. Heat transport and local temperature measurements were made for Rayleigh numbers 2 x 10(5) < Ra < 5 x 10(8) and Taylor numbers 0 less than or equal to Ta less than or equal to 5 x 10(9). For fixed convective Rossby numbers Ro between 0.1 and 1.5, the Nusselt number N scaled closely as the 2/7 power of Ra but had very little variation with the Prandtl number a and only a moderate increase with increasing rotation rate. Substantial disagreement is found with existing scaling theories. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP Liu, YM (reprint author), LOS ALAMOS NATL LAB,CONDENSED MATTER & THERMAL PHYS GRP,POB 1663,LOS ALAMOS,NM 87545, USA. OI Ecke, Robert/0000-0001-7772-5876 NR 21 TC 80 Z9 81 U1 0 U2 7 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 SEP 22 PY 1997 VL 79 IS 12 BP 2257 EP 2260 DI 10.1103/PhysRevLett.79.2257 PG 4 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900024 ER PT J AU Fast, L Ahuja, R Nordstrom, L Wills, JM Johansson, B Eriksson, O AF Fast, L Ahuja, R Nordstrom, L Wills, JM Johansson, B Eriksson, O TI Anomaly in cia ratio of Zn under pressure SO PHYSICAL REVIEW LETTERS LA English DT Article ID ZINC AB Recently an anomaly in the cia ratio for hcp Zn was observed as a function of hydrostatic compression [Takemura Kenichi, Phys. Rev. Lett. 75, 1807 (1995)]. The anomaly is even more pronounced for the lattice parameter a in the hexagonal plane. By means of accurate first principles calculations we demonstrate that at a specific volume the distances between the atoms within the hexagonal planes of Zn actually increase when the volume is decreased. By an explicit separation of the various contributions from different volume segments of the Brillouin zone we conclude that the electronic states around the K point are those responsible for the observed anomaly. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. RP UNIV UPPSALA, DEPT PHYS, CONDENSED MATTER THEORY GRP, S-75121 UPPSALA, SWEDEN. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 16 TC 41 Z9 42 U1 1 U2 11 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 SEP 22 PY 1997 VL 79 IS 12 BP 2301 EP 2303 DI 10.1103/PhysRevLett.79.2301 PG 3 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900035 ER PT J AU Mauri, F Pfrommer, BG Louie, SG AF Mauri, F Pfrommer, BG Louie, SG TI Ab initio NMR chemical shift of diamond, chemical-vapor-deposited diamond, and amorphous carbon SO PHYSICAL REVIEW LETTERS LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; MICROSCOPIC STRUCTURE; FILMS; C-13; SPECTROSCOPY; RAMAN; PSEUDOPOTENTIALS AB The NMR chemical shift spectra of diamond, chemical-vapor-deposited (CVD) diamond, and diamondlike amorphous carbon are computed from first principles. The results of our calculation are in excellent agreement with experiments, and are useful for the interpretation of the NMR spectra in terms of the microscopic structure of the materials. In particular, we show that the NMR and Raman linewidths in polycrystalline CVD diamond are due to stress fluctuations, and we support a heterogeneous model for the amorphous hydrogenated phase. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. PPH ECUBLENS,IRRMA,CH-1015 LAUSANNE,SWITZERLAND. RP Mauri, F (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI mauri, francesco/K-5726-2012 OI mauri, francesco/0000-0002-6666-4710 NR 25 TC 51 Z9 51 U1 2 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 SEP 22 PY 1997 VL 79 IS 12 BP 2340 EP 2343 DI 10.1103/PhysRevLett.79.2340 PG 4 WC Physics, Multidisciplinary SC Physics GA XW939 UT WOS:A1997XW93900045 ER PT J AU Loehle, C AF Loehle, C TI The adaptive significance of trunk inclination on slopes: a commentary SO PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES LA English DT Article AB A recent study explored the adaptive significance of trunk inclination for trees growing on steep slopes. The authors used an optimality argument to predict how much a tree should respond to sidelight. Their calculations of the costs of leaning are flawed, because: (i) leaf mass has an allometric relationship with total volume, rather than being a fixed proportion of wood mass; (ii) the cost of support wood tissue is mainly a growth rate cost, not a maintenance respiration cost; (iii) small trees are sufficiently elastic to need very little support tissue, and thus they have a different risk structure; and (iv) most crown gaps are ephemeral rather than permanent, which also changes the risk equation. The argument I proposed in a previous study, addressing exactly the same question, is that canopy species are under selective pressure to maintain a strong central trunk that will reach the canopy and thus should not respond to sidelight. A reproductive value model is presented to illustrate this evolutionary question. Small, short-lived species or those from habitats with permanent openings (such as river margins) should be responsive. Both my previous data and the data of the other study support my model, but the model in the other study leaves many facts unexplained. RP Loehle, C (reprint author), ARGONNE NATL LAB, DIV ENVIRONM RES, ARGONNE, IL 60439 USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU ROYAL SOC PI LONDON PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND SN 0962-8452 J9 P ROY SOC B-BIOL SCI JI Proc. R. Soc. B-Biol. Sci. PD SEP 22 PY 1997 VL 264 IS 1386 BP 1371 EP 1374 DI 10.1098/rspb.1997.0190 PG 4 WC Biology; Ecology; Evolutionary Biology SC Life Sciences & Biomedicine - Other Topics; Environmental Sciences & Ecology; Evolutionary Biology GA XY660 UT WOS:A1997XY66000017 ER PT J AU Mobarak, M Berger, H Lorusso, GF Capozzi, V Perna, G Ibrahim, MM Margaritondo, G AF Mobarak, M Berger, H Lorusso, GF Capozzi, V Perna, G Ibrahim, MM Margaritondo, G TI The growth and characterization of GaInSe2 single crystals SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID GALLIUM SELENIDE; HIGH-PRESSURE; TLINS2; GASE; TRANSITIONS AB GalnSe(2) single crystals have been grown and characterized by experimental techniques such as high-resolution transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy and optical and electrical measurements. The samples were prepared in single-crystal form from a melt. The structural analysis indicates that GalnSe(2) has a hexagonal structure, and confirms the high quality of the produced single crystals. Quantitative information on electrical and optical properties of single-crystalline GalnSe(2) was obtained by investigating the resistivity and photoluminescence as a function of the temperature and excitation intensity. C1 ECOLE POLYTECH FED LAUSANNE,INST PHYS APPL,CH-1015 LAUSANNE,SWITZERLAND. ERNEST ORLANDO LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV BARI,DIPARTMENTO FIS,I-70126 BARI,ITALY. FAC SCI,DEPT PHYS,SOHAG,EGYPT. RP Mobarak, M (reprint author), QUENA S VALLEY UNIV,DEPT PHYS,QENA,EGYPT. RI Margaritondo, Giorgio/B-1367-2008 NR 22 TC 4 Z9 4 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD SEP 21 PY 1997 VL 30 IS 18 BP 2509 EP 2513 DI 10.1088/0022-3727/30/18/003 PG 5 WC Physics, Applied SC Physics GA XY645 UT WOS:A1997XY64500003 ER PT J AU Datskos, PG Tav, C Sauers, I Pinnaduwage, LA AF Datskos, PG Tav, C Sauers, I Pinnaduwage, LA TI Electron attachment to thermally excited trichlorotrifluoroethane (1,1,2-C2Cl3F3) SO JOURNAL OF PHYSICS D-APPLIED PHYSICS LA English DT Article ID DISSOCIATIVE ATTACHMENT; CROSS SECTIONS; SF6; TEMPERATURE; MIXTURES; ENERGY; DISCHARGES; DEPENDENCE; DETACHMENT; GASES AB Electron attachment to trichlorotrifluoroethane (1,1,2-C2Cl3F3) was investigated in buffer gases of N-2 and Ar using a high-temperature electron swarm apparatus. The negative ion intensity was also measured as a function of electron energy using an electron beam apparatus. The electron attachment rate constant, k(a)((epsilon),T), was measured in the mean electron energy range, (epsilon), 0.043 to 4.7 eV and over a temperature, T, range 300 to 700 K in the electron swarm experiments. The electron attachment rate constant was found to first increase slightly with increasing temperature and subsequently decrease for T less than or equal to 600 K. Our room-temperature electron beam study showed that 1, 1,2-C2Cl3F3 attaches electrons predominantly via dissociative negative ion states and revealed that the electron attachment cross section exhibits three main peaks: one at similar to 0.0 eV producing Cl-, a second one at similar to 2.9 eV due to F- and a third one at similar to 7.1 eV also producing F-. The electron attachment cross sections obtained using an electron swarm-unfolding technique show that the peak at similar to 0.0 eV observed in the electron beam study is actually composed of three peaks; one at similar to 0.0 eV and two more at higher electron energies but below 1.5 eV. C1 OAK RIDGE NATL LAB,DIV LIFE SCI,OAK RIDGE,TN 37831. RP Datskos, PG (reprint author), UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996, USA. NR 34 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0022-3727 J9 J PHYS D APPL PHYS JI J. Phys. D-Appl. Phys. PD SEP 21 PY 1997 VL 30 IS 18 BP 2596 EP 2602 DI 10.1088/0022-3727/30/18/015 PG 7 WC Physics, Applied SC Physics GA XY645 UT WOS:A1997XY64500015 ER PT J AU Gross, CL Young, DM Schultz, AJ Girolami, GS AF Gross, CL Young, DM Schultz, AJ Girolami, GS TI Neutron diffraction study of the 'elongated' molecular dihydrogen complex [(C5Me5)Os(H-2)H-2(PPh3)](+) SO JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS LA English DT Article ID X-RAY; HYDRIDE; LIGANDS; COORDINATION; POLYHYDRIDES; SCATTERING; CHEMISTRY; H-2 AB Protonation of the osmium(IV) hydrides (C5Me5)OsH3(L) with HBF4 in diethyl ether afforded the cationic dihydrogen complexes [(C5Me5)Os(H-2)H-2(L)][BF4], where L is PPh3 1 or AsPh3 2;it single-crystal neutron diffraction study of 1 reveals that the H-H distance is 1.014(11) Angstrom. C1 ARGONNE NATL LAB,INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439. RP Gross, CL (reprint author), UNIV ILLINOIS,SCH CHEM SCI,601 S GOODWIN,URBANA,IL 61801, USA. NR 23 TC 16 Z9 16 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0300-9246 J9 J CHEM SOC DALTON JI J. Chem. Soc.-Dalton Trans. PD SEP 21 PY 1997 IS 18 BP 3081 EP 3082 DI 10.1039/a704997h PG 2 WC Chemistry, Inorganic & Nuclear SC Chemistry GA XZ144 UT WOS:A1997XZ14400002 ER PT J AU Aaron, WS Tracy, JG Collins, ED AF Aaron, WS Tracy, JG Collins, ED TI Status of stable isotope enrichment, products, and services at the Oak Ridge National Laboratory SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 18th World Conference of the International-Nuclear-Target-Development-Society CY OCT 07-11, 1996 CL STRASBOURG, FRANCE SP Int Nucl Target Dev Soc DE calutron; isotope separation; target laboratory AB The Oak Ridge National Laboratory (ORNL) has been supplying enriched stable and radioactive isotopes to the research, medical, and industrial communities for over 50 y. Very significant changes have occurred in this effort over the past several years, and, while many of these changes have had a negative impact on the availability of enriched isotopes, more recent developments are actually improving the situation for both the users and the producers of enriched isotopes. ORNL is still a major producer and distributor of radioisotopes, but future isotope enrichment operations to be conducted at the Isotope Enrichment Facility (IEF) will be limited to stable isotopes. Among the positive changes in the enriched stable isotope area are a well-functioning, long-term contract program, which offers stability and pricing advantages; the resumption of calutron operations; the adoption of prorated conversion charges, which greatly improves the pricing of isotopes to small users; ISO 9002 registration of the IEF's quality management system; and a much more customer-oriented business philosophy. Efforts are also being made to restore and improve upon the extensive chemical and physical form processing capablities that once existed in the enriched stable isotope program. Innovative ideas are being pursued in both technical and administrative areas to encourage the beneficial use of enriched stable isotopes and the development of related technologies. RP Aaron, WS (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 4 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 SEP 21 PY 1997 VL 397 IS 1 BP 9 EP 12 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XZ065 UT WOS:A1997XZ06500003 ER PT J AU Mausner, LF Hock, JC AF Mausner, LF Hock, JC TI Target design considerations for isotope production with high intensity 200 MeV protons SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 18th World Conference of the International-Nuclear-Target-Development-Society CY OCT 07-11, 1996 CL STRASBOURG, FRANCE SP Int Nucl Target Dev Soc DE BLIP targets; isotope production AB An upgrade project was recently completed on the 200 MeV H- Linac and the Brookhaven Linac Isotope Producer (BLIP) in order to improve radioisotope production capacity and reliability. The average beam current has increased from 60 to 146 mu A. Because of the large increase in deposited beam power (up to 29 kW), the target cooling system was upgraded, and new targets and target mechanical system were designed. The heat transport model that guided this design and preliminary tests with beam are described. C1 BROOKHAVEN NATL LAB,AGS DEPT,UPTON,NY 11973. RP Mausner, LF (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. NR 5 TC 3 Z9 3 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 SEP 21 PY 1997 VL 397 IS 1 BP 18 EP 21 DI 10.1016/S0168-9002(97)00584-6 PG 4 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XZ065 UT WOS:A1997XZ06500005 ER PT J AU Greene, JP Nemanich, J Thomas, GE Schiel, SL AF Greene, JP Nemanich, J Thomas, GE Schiel, SL TI Noble gas sputtering calculations using TRIM SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 18th World Conference of the International-Nuclear-Target-Development-Society CY OCT 07-11, 1996 CL STRASBOURG, FRANCE SP Int Nucl Target Dev Soc ID PROGRAM; TARGETS AB In conjunction with our experimental work on sputtering with a saddle-held ion source, the Monte-Carlo program TRansport of Ions in Matter (TRIM) was applied to calculate the sputter yields for a variety of noble gas sputtering applications. Comparison with experiments are shown. Information extracted from these analyses have proved useful in optimizing the experimental sputtering parameters. Calculated sputter yields obtained utilizing TRIM are presented for noble gas sputtering of a variety of materials common to nuclear target preparation. C1 UNIV ILLINOIS,URBANA,IL 61801. RP Greene, JP (reprint author), ARGONNE NATL LAB,DIV PHYS,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 15 TC 4 Z9 4 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 SEP 21 PY 1997 VL 397 IS 1 BP 91 EP 98 DI 10.1016/S0168-9002(97)00578-0 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XZ065 UT WOS:A1997XZ06500020 ER PT J AU Greene, JP Thomas, GE Schiel, SL AF Greene, JP Thomas, GE Schiel, SL TI Novel uses of a wide-beam saddle-field ion source for producing targets at the Argonne National Laboratory SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 18th World Conference of the International-Nuclear-Target-Development-Society CY OCT 07-11, 1996 CL STRASBOURG, FRANCE SP Int Nucl Target Dev Soc DE sputtering; lead, Pb; gadolinium, Gd; thickness by energy loss ID NUCLEAR ACCELERATOR TARGETS; VACUUM SPUTTER-DEPOSITION AB The wide-beam ion sputter source has several unique characteristics which make it very useful for producing, reducing the thickness or cleaning the surface of targets manufactured from expensive separated isotope. A discussion of these techniques as well as the sputter-source characteristics will be given. Sputter yields obtained utilizing this source are presented for a variety of materials common to nuclear-target production. C1 UNIV ILLINOIS,URBANA,IL 61801. RP Greene, JP (reprint author), ARGONNE NATL LAB,DIV PHYS,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 11 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 SEP 21 PY 1997 VL 397 IS 1 BP 99 EP 104 DI 10.1016/S0168-9002(97)00765-1 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XZ065 UT WOS:A1997XZ06500021 ER PT J AU Liechtenstein, VK Ivkova, TM Olshanski, ED Feigenbaum, I DiNardo, R Dobeli, M AF Liechtenstein, VK Ivkova, TM Olshanski, ED Feigenbaum, I DiNardo, R Dobeli, M TI Preparation and evaluation of thin diamond-like carbon foils for heavy-ion tandem accelerators and time-of-flight spectrometers SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 18th World Conference of the International-Nuclear-Target-Development-Society CY OCT 07-11, 1996 CL STRASBOURG, FRANCE SP Int Nucl Target Dev Soc ID STRIPPER FOILS; IRRADIATION DAMAGE; FILMS; DEPOSITION AB Thin diamond-like carbon (DLC) foils in the thickness range of 0.6-15 mu g/cm(2) were produced and evaluated as heavy-ion strippers for tandem accelerators and as secondary-electron emitters for time-of-flight (TOF) spectrometers. The foils were produced by DC glow discharge sputter deposition of pure carbon with condensation of DLC films onto glass slides coated with a release agent. Irradiation lifetimes of 3 mu g/cm(2) DLC foils made by this technique were compared with lifetimes of standard vapor deposited carbon foils when bombarded with 14 MeV (19)7Au(-) ions at the terminal of the BNL MP7 Tandem Accelerator. Preliminary measurements have indicated that DLC strippers outlast the standard foils by a factor of at least three. The high tensile strength of DLC foils allowed reducing of the minimal thickness of start foil, for TOF spectrometer down to approximate to 0.6 mu g/cm(2), resulting in considerably improved energy resolution, due to lower ion energy straggling in the foil. Along with initially used special DC sputter deposition system, a commercially available diode RF sputtering technique was investigated as candidate method for large-scale production of DLC foils. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. ETH HONGGERBERG,PAUL SCHERRER INST,CH-8093 ZURICH,SWITZERLAND. RP Liechtenstein, VK (reprint author), RRC KURCHATOV INST,MOSCOW 123182,RUSSIA. NR 35 TC 36 Z9 38 U1 0 U2 5 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 SEP 21 PY 1997 VL 397 IS 1 BP 140 EP 145 DI 10.1016/S0168-9002(97)00732-8 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XZ065 UT WOS:A1997XZ06500030 ER PT J AU Gobby, PL Salzer, LJ Day, RD Bartos, JJ Rivera, G Hatch, DJ Garcia, FP Manzanares, R Foreman, LR Bush, H AF Gobby, PL Salzer, LJ Day, RD Bartos, JJ Rivera, G Hatch, DJ Garcia, FP Manzanares, R Foreman, LR Bush, H TI Micromachining of inertial confinement fusion targets SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article; Proceedings Paper CT 18th World Conference of the International-Nuclear-Target-Development-Society CY OCT 07-11, 1996 CL STRASBOURG, FRANCE SP Int Nucl Target Dev Soc AB Many experiments conducted on today's largest inertial confinement fusion drive lasers require target components with sub-millimeter dimensions, precisions of a micron or less and surface finishes measured in nanometers. For metal and plastic, techniques using direct machining with diamond tools have been developed that yield the desired parts. New techniques that will be discussed include the quick-flip locator, a magnetically held kinematic mount that has allowed the. direct machining of millimeter-sized beryllium hemishells whose inside and outside surface are concentric to within 0.25 mu m, and an electronic version of a tracer lathe which has produced precise azimuthal variations of less than a micron. RP Gobby, PL (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 3 TC 1 Z9 1 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 SEP 21 PY 1997 VL 397 IS 1 BP 183 EP 188 DI 10.1016/S0168-9002(97)00369-0 PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XZ065 UT WOS:A1997XZ06500037 ER PT J AU MacKerrow, EP Schmitt, MJ AF MacKerrow, EP Schmitt, MJ TI Measurement of integrated speckle statistics for CO2 lidar returns from a moving, nonuniform, hard target SO APPLIED OPTICS LA English DT Article DE laser speckle; differential absorption lidar; correlation area; averaging statistics; gamma distribution; albedo; depolarization; remote sensing ID DIFFERENTIAL ABSORPTION LIDAR; ATMOSPHERIC BACKSCATTER; TURBULENT ATMOSPHERE; DIAL MEASUREMENTS; REFLECTANCE; CALIBRATION; PROPAGATION AB A pulsed, dual CO2 laser Lidar was used to measure return signal statistics as a function of the number of speckles integrated by the lidar receiver per laser pulse. A rotating target generated statistically independent speckle patterns on each laser pulse. Data were collected for a Ride range of receiver aperture sizes. A statistical model is developed that predicts the probability density of the return lidar pulse energy, which includes speckle, depolarization by the target, and albedo sampling. The predictions of this model are compared with the measured probability density function of the return pulse energies. Very good agreement is found between the geometrically calculated number of integrated speckles and the number predicted by the model. (C) 1997 Optical Society of America. RP MacKerrow, EP (reprint author), LOS ALAMOS NATL LAB,DIV APPL THEORET PHYS,MAIL STOP E543,LOS ALAMOS,NM 87545, USA. NR 39 TC 15 Z9 15 U1 0 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD SEP 20 PY 1997 VL 36 IS 27 BP 6921 EP 6937 DI 10.1364/AO.36.006921 PG 17 WC Optics SC Optics GA XV502 UT WOS:A1997XV50200031 PM 18259564 ER PT J AU Scoccimarro, R AF Scoccimarro, R TI Cosmological perturbations: Entering the nonlinear regime SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology, theory; large-scale structure of the universe; methods, numerical ID LARGE-SCALE STRUCTURE; 3-POINT CORRELATION-FUNCTION; N-BODY SIMULATIONS; POWER SPECTRUM; GRAVITATIONAL-INSTABILITY; ZELDOVICH APPROXIMATION; CORRELATION HIERARCHY; COSMIC FIELDS; EVOLUTION; FLUCTUATIONS AB We consider next-to-leading-order (one-loop) nonlinear corrections to the bispectrum and skewness of cosmological density fluctuations induced by gravitation evolution, focusing on the case of Gaussian initial conditions and scale-free initial power spectra, P(k) proportional to k ''. As has been established by comparison with numerical simulations, leading order (tree-level) perturbation theory describes these quantities at the largest scales. The one-loop perturbation theory provides a tool to probe the transition to the nonlinear regime on smaller scales. In this work, we find that, as a function of spectral index n, the one-loop bispectrum follows a pattern analogous to that of the one-loop power spectrum, which shows a change in behavior at a ''critical index'' n(c) approximate to -1.4, where nonlinear corrections vanish. The tree-level perturbation theory predicts a characteristic dependence of the bispectrum on the shape of the triangle defined by its arguments. For n less than or similar to n(c), one-loop corrections increase this configuration dependence of the leading order contribution; for n greater than or similar to n(c), one-loop corrections tend to cancel the configuration dependence of the tree-level bispectrum, in agreement with known results from n = -1 numerical simulations. A similar situation is shown to hold for the Zeldovich approximation, where n(c) approximate to -1.75. We obtain explicit analytic expressions for the one-loop bispectrum for n = -2 initial power spectra, for both the exact dynamics of gravitational instability and the Zeldovich approximation. We also compute the skewness factor, including local averaging of the density field, for n = -2: S-3(R) = 4.02 + 3.83 sigma(G)(2)(R) for Gaussian smoothing and S-3(R) = 3.86 + 3.18 sigma(TH)(2)(R) for top-hat smoothing, where sigma(2)(R) is the variance of the density field fluctuations smoothed over a window of radius R. A comparison with fully nonlinear numerical simulations implies that, for n < -1, the one-loop perturbation theory can extend our understanding of nonlinear clustering down to scales where the transition to the stable clustering regime begins. C1 UNIV CHICAGO, DEPT PHYS, CHICAGO, IL 60637 USA. UNIV CHICAGO, ENRICO FERMI INST, CHICAGO, IL 60637 USA. FERMILAB NATL ACCELERATOR LAB, NASA, FERMILAB ASTROPHYS CTR, BATAVIA, IL 60510 USA. NR 66 TC 44 Z9 44 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 20 PY 1997 VL 487 IS 1 BP 1 EP 17 DI 10.1086/304578 PN 1 PG 17 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA XY506 UT WOS:A1997XY50600001 ER PT J AU SteimanCameron, TY Scargle, JD Imamura, JN Middleditch, J AF SteimanCameron, TY Scargle, JD Imamura, JN Middleditch, J TI 16 second optical quasi-periodic oscillations in GX 339-4 SO ASTROPHYSICAL JOURNAL LA English DT Article DE black hole physics; stars, individual (GX 339-4); stars, oscillations; X-rays, stars ID BLACK-HOLE CANDIDATE; X-RAY; GX339-4; STATE; GX-339-4 AB We report the results of high-speed optical white-light photometry of the black hole candidate GX 339-4, obtained at the Cerro Tololo Inter-American Observatory during 1996 April. We searched the data for strictly periodic features, quasi-periodic oscillations (QPOs) and aperiodic variability (noise) using Fourier and wavelet techniques. (1) We found a QPO with amplitude 4.5%-6%, frequency f similar to 0.064 Hz, and width Delta f/f similar to 0.3-0.5. The QPO was long-lived in that it was present in all segments of the data, even in sets acquired one day apart. (2) In addition to the 0.064 Hz QPO there are indications of low-amplitude QPOs at f = 0.02, 0.03, 0.08, 0.3, and 3 Hz. None of the features appeared in more than one day of data (except for the 0.08 Hz feature) and none of the features were as strong as the 0.064 Hz QPO, and so they should be taken with some caution. (3) We found power in excess of counting statistics out to frequencies of several hertz on both nights. The origin of this excess power is not clear. C1 UNIV OREGON,INST THEORET SCI,EUGENE,OR 97403. UNIV OREGON,DEPT PHYS,EUGENE,OR 97403. LOS ALAMOS NATL LAB,COMP INFORMAT & COMMUN DIV,LOS ALAMOS,NM 87545. RP SteimanCameron, TY (reprint author), NASA,AMES RES CTR,DIV SPACE SCI,MOFFETT FIELD,CA 94035, USA. NR 25 TC 17 Z9 17 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 20 PY 1997 VL 487 IS 1 BP 396 EP 401 PN 1 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA XY506 UT WOS:A1997XY50600037 ER PT J AU Rubio, A Alonso, JA Blase, X Louie, SG AF Rubio, A Alonso, JA Blase, X Louie, SG TI Theoretical models for the optical properties of clusters and nanostructures SO INTERNATIONAL JOURNAL OF MODERN PHYSICS B LA English DT Review ID DENSITY-FUNCTIONAL THEORY; SIMPLE METAL-CLUSTERS; COLLECTIVE ELECTRONIC EXCITATIONS; ABINITIO CONFIGURATION-INTERACTION; PHOTOABSORPTION CROSS-SECTION; DEPENDENT PERTURBATION-THEORY; SURFACE-PLASMON DISPERSION; CONSISTENT JELLIUM MODEL; AB-INITIO CALCULATIONS; SMALL SILICON CLUSTERS AB Applications of the Time Dependent Density Functional Formalism to calculate the response of metallic and semiconducting nanostructures to static and time-dependent electric fields in the linear regime are reviewed. The paper focuses on the presentation of models of increasing sophistication for the cluster structure, ranging from the simple spherical jellium model to a fully ab initio description of the ionic structure. Simple models explain the main features of the spectrum. For instance the existence of a pronounced surface plasmon resonance in the absorption spectrum of alkali metal clusters, and its redshift with respect to the classical Mie resonance are well explained within the framework of the simple jellium model. However, the detailed understanding of the experimental optical spectra can only be achieved by complementary ab initio calculations. In fact, the optical spectrum appears to carry detailed information on the cluster structure. Details of the new theories and computational schemes to deal with the optical properties of complex systems are also presented: linear and nonlinear susceptibilities, quasiparticle excitations, core-polarization. These methods are of relevance in the physics of nanostructures and nanoscale technology. C1 UNIV LYON 1, DEPT MAT PHYS, UMR 5586, F-69622 VILLEURBANNE, FRANCE. UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RP UNIV VALLADOLID, DEPT FIS TEOR, E-47011 VALLADOLID, SPAIN. RI Rubio, Angel/A-5507-2008; Alonso, Julio /D-5781-2016 OI Rubio, Angel/0000-0003-2060-3151; Alonso, Julio /0000-0002-8604-8608 NR 175 TC 35 Z9 35 U1 2 U2 11 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-9792 EI 1793-6578 J9 INT J MOD PHYS B JI Int. J. Mod. Phys. B PD SEP 20 PY 1997 VL 11 IS 23 BP 2727 EP 2776 DI 10.1142/S0217979297001349 PG 50 WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical SC Physics GA YA216 UT WOS:A1997YA21600001 ER PT J AU Gilpin, T Apel, E Fried, A Wert, B Calvert, J Zhang, GF Dasgupta, PK Harder, JW Heikes, B Hopkins, B Westberg, H Kleindienst, T Lee, YN Zhou, XL Lonneman, W Sewell, S AF Gilpin, T Apel, E Fried, A Wert, B Calvert, J Zhang, GF Dasgupta, PK Harder, JW Heikes, B Hopkins, B Westberg, H Kleindienst, T Lee, YN Zhou, XL Lonneman, W Sewell, S TI Intercomparison of six ambient [CH2O] measurement techniques SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID ATMOSPHERIC CARBONYL-COMPOUNDS; OBSERVATORY PHOTOCHEMISTRY EXPERIMENT; LASER ABSORPTION-SPECTROSCOPY; LIQUID-CHROMATOGRAPHY; FORMALDEHYDE; AIR; ISOPRENE; HCHO; PHOTOOXIDATION; INTERFERENCE AB From May 29 to June 3, 1995 a blind intercomparison of six ambient formaldehyde measurement techniques took place at a field site near the National Center for Atmospheric Research in Boulder, Colorado. The continuous measurement methods intercompared were tunable diode laser absorption spectroscopy, (TDLAS); coil/2,4-dinitrophenylhydrazine, (CDNPH); 1,3-cyclohexanedione-diffusion scrubber (CHDDS); and the coil enzyme method (CENZ). In addition, two different cartridge methods were compared: silica gel-2,4-dinitrophenylhydrazine (DPNH) systems and a C-18-DNPH system. The intercomparison was conducted with spiked zero air (part 1) and ambient air (part 2). The CH2O standards for part 1 were calibrated by several independent methods and delivered to participants via a common glass manifold with potential trace gas interferants common to ambient air (O-3, SO2, NO2, isoprene, H2O). The TDLAS system was used to confirm the absolute accuracy of the standards and served as a mission reference for part 1. The ambient phase lasted 44 hours with all participants sampling from a common glass tower. Differences between the ambient [CH2O] observed by the TDLAS and the other continuous methods were significant in some cases. For matched ambient measurement times the average ratios (+/- 1 sigma) [CH2O](measured)/[CH2O](TDLAS) were: 0.89 +/- 0.12 (CDNPH); 1.30 +/- 0.02 (CHDDS); 0.63 +/- 0.03 (CENZ), The methods showed similar variations but different absolute values and the divergences appeared to result largely from calibration differences (no gas phase standards were used by groups other than NCAR). When the regressions of the participant [CH2O] values versus the TDLAS values, (measured in part 1), were used to normalize all of the results to the common gas phase standards of the NCAR group, the average ratios (+/- 1 sigma), [CH2O](corrected)/[CH2O](TDLAS) for the first measurement period were much closer to unity: 1.04 +/- 0.14 (CDNPH), 1.00 +/- 0.11 (CHDDS), and 0.82 +/- 0.08 (CENZ). With the continuous methods used here, no unequivocal interferences were seen when SO2, NO2, O-3, and isoprene impurities were added to prepared mixtures or when these were present in ambient air. The measurements with the C-18 DNPH (no O-3 scrubber) and silica gel DNPH cartridges (with O-3 scrubber) showed a reasonable correlation with the TDLAS measurements, although the results from the silica cartridges were about a factor of two below the standards in the spike experiments and about 35% below in the ambient measurements. Using the NCAR gas-phase spike data to calibrate the response of the silica gel cartridges in the ambient studies, the results are the same within statistical uncertainty. When the same gas phase calibration was used with the C-18 cartridges, the results showed a positive bias of about 35%, presumably reflecting a positive ozone interference in this case (no ozone scrubber used). The silica DNPH cartridge results from the second participant were highly scattered and showed no significant correlation with the TDLAS measurements. C1 TEXAS TECH UNIV, DEPT CHEM & BIOCHEM, LUBBOCK, TX 79409 USA. NOAA, AERON LAB, BOULDER, CO 80303 USA. UNIV RHODE ISL, GRAD SCH OCEANOG, CTR ATMOSPHER STUDIES, NARRAGANSETT, RI 02882 USA. WASHINGTON STATE UNIV, CHEM ENGN LAB ATMOSPHER RES, PULLMAN, WA 99164 USA. MANTECH ENVIRONM TECHNOL INC, ATMOSPHER CHEM GRP, RES TRIANGLE PK, NC 27709 USA. BROOKHAVEN NATL LAB, ENVIRONM CHEM DIV, UPTON, NY 11973 USA. US EPA, NERL, RES TRIANGLE PK, NC 27711 USA. PHILLIPS ACAD, ANDOVER, MA USA. RP Gilpin, T (reprint author), NATL CTR ATMOSPHER RES, POB 3000, BOULDER, CO 80307 USA. NR 50 TC 67 Z9 68 U1 2 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD SEP 20 PY 1997 VL 102 IS D17 BP 21161 EP 21188 DI 10.1029/97JD01314 PG 28 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA XX380 UT WOS:A1997XX38000001 ER PT J AU Elliott, S Blake, DR Rowland, FS Lu, R Brown, MJ Williams, MD Russell, AG Bossert, JE Streit, GE Santoyo, MR Guzman, F Porch, WM McNair, LA Keyantash, J Kao, CYJ Turco, RP Eichinger, WE AF Elliott, S Blake, DR Rowland, FS Lu, R Brown, MJ Williams, MD Russell, AG Bossert, JE Streit, GE Santoyo, MR Guzman, F Porch, WM McNair, LA Keyantash, J Kao, CYJ Turco, RP Eichinger, WE TI Ventilation of liquefied petroleum gas components from the Valley of Mexico SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID AIR POLLUTANT TRANSPORT; ALKYL NITRATE FORMATION; REGIONAL-SCALE FLOWS; ATMOSPHERIC AEROSOLS; NITROGEN-OXIDES; ELEMENTAL CONCENTRATIONS; TROPOSPHERIC CHEMISTRY; MOUNTAINOUS TERRAIN; COASTAL ENVIRONMENT; TEMPORAL VARIATIONS AB The saturated hydrocarbons propane and the butane isomers are both indirect greenhouse gases and key species in liquefied petroleum gas (LPG). Leakage of LPG and its component alkanes/alkenes is now thought to explain a significant fraction of the volatile organic burden and oxidative potential in the basin which confines Mexico City. Propane and the butanes, however, are stable enough to escape from the basin. The gas chromatographic measurements which have drawn attention to their sources within the urban area are used here to estimate rates of ventilation into the free troposphere. The calculations are centered on several well studied February/March pollution episodes, Carbon monoxide observations and emissions data are first exploited to provide a rough time constant for the removal of typical inert pollutant species from the valley. The timescale obtained is validated through an examination of meteorological simulations of three-dimensional flow. Heuristic arguments and transport modeling establish that propane and the butanes are distributed through the basin in a manner analogous to CO despite differing emissions functions. Ventilation rates and mass loadings yield outbound fluxes in a box model type computation. Estimated in this fashion, escape from the Valley of Mexico constitutes of the order of half of 1% of the northern hemispheric inputs for both propane and n-butane. Uncertainties in the calculations are detailed and include factors such as flow into the basin via surface winds and the size of the polluted regime. General quantification of the global propane and butane emissions from large cities will entail studies of this type in a variety of locales. C1 UNIV CALIF IRVINE, DEPT CHEM, IRVINE, CA 92715 USA. LOS ALAMOS NATL LAB, ENERGY & ENVIRONM ANAL GRP, TECHNOL & SAFETY ASSESSMENT DIV, LOS ALAMOS, NM 87545 USA. INST MEXICANO PETR, MEXICO CITY 07730, DF, MEXICO. UNIV CALIF LOS ANGELES, DEPT ATMOSPHER SCI, LOS ANGELES, CA 90024 USA. CARNEGIE MELLON UNIV, DEPT MECH ENGN, PITTSBURGH, PA 15217 USA. RP Elliott, S (reprint author), LOS ALAMOS NATL LAB, DIV EARTH & ENVIRONM SCI, GEOANAL GRP, LOS ALAMOS, NM 87545 USA. OI Brown, Michael J./0000-0002-8069-0835 NR 73 TC 10 Z9 10 U1 0 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD SEP 20 PY 1997 VL 102 IS D17 BP 21197 EP 21207 DI 10.1029/97JD01520 PG 11 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA XX380 UT WOS:A1997XX38000003 ER PT J AU Novakov, T Corrigan, CE Penner, JE Chuang, CC Rosario, O Bracero, OLM AF Novakov, T Corrigan, CE Penner, JE Chuang, CC Rosario, O Bracero, OLM TI Organic aerosols in the Caribbean trade winds: A natural source? SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID ANTHROPOGENIC SULFATE AEROSOLS; CLOUD-CONDENSATION-NUCLEI; PARTICULATE CONCENTRATIONS; CARBONACEOUS AEROSOLS; ATLANTIC AIR; TROPOSPHERE; PARTICLES; SYSTEM; ALKANE; OCEAN AB Mass concentrations of carbonaceous and inorganic components of submicron (aerodynamic diameters < 0.6 mu m) aerosol particles were measured at Cape San Juan, a coastal site located on the extreme northeastern tip of Puerto Rico. Additionally, carbonaceous aerosols and condensation nuclei (CN) were measured offshore during a limited shipboard sampling experiment at an Atlantic Ocean site away from the coast. Both sites were exposed to trade winds during the sampling periods. Under these conditions no obvious upwind anthropogenic sources should impact the sites. From the analyses of collected filter samples, mass concentrations of major inorganic anions and filterable particulate organic aerosol material (OCP) were determined. The derived OCP concentrations may represent lower limits because of the uncertainty in the collection of semivolatile organic material lost from the particles during sampling. Analyses of Cape San Juan samples show that (1) mass concentrations of submicron OCP (average al-rout 390 ng m(-3)) exceed sulfate concentrations (average about 270 ng m(-3)); (2) this organic aerosol material is water soluble (and the particles act as effective cloud condensation nuclei); and (3) primary combustion aerosol does not appear to be a major contributor to OCP. The fact that OCP concentrations measured at the coastal site are similar to OCP concentrations (330 - 400 ng m(-3)) measured at an Atlantic Ocean site removed from the coast suggests that a substantial fraction of the OCP in the Caribbean trade winds may be associated with natural oceanic emissions. Results imply that background organic marine aerosol should be included in estimating the indirect forcing of climate by anthropogenic sulfate aerosol. C1 LAWRENCE LIVERMORE NATL LAB, DIV ATMOSPHER SCI, LIVERMORE, CA 94551 USA. UNIV PUERTO RICO, DEPT CHEM, RIO PIEDRAS, PR 00931 USA. RP Novakov, T (reprint author), UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, ENVIRONM ENERGY TECHNOL DIV, MS-73, BERKELEY, CA 94720 USA. RI Penner, Joyce/J-1719-2012; chuang, cathy/H-4814-2012 NR 29 TC 106 Z9 108 U1 0 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD SEP 20 PY 1997 VL 102 IS D17 BP 21307 EP 21313 DI 10.1029/97JD01487 PG 7 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA XX380 UT WOS:A1997XX38000009 ER PT J AU Li, SM Macdonald, AM Strapp, JW Lee, YN Zhou, XL AF Li, SM Macdonald, AM Strapp, JW Lee, YN Zhou, XL TI Chemical and physical characterizations of atmospheric aerosols over southern California SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID ANTHROPOGENIC AEROSOLS; ARCTIC AEROSOLS; SULFATE; PARTICLES; MODEL AB In September 1994 the chemical and physical properties of aerosol particles over southern California were characterized. Concentrations of particle chemical species were higher near the surface than at higher altitudes. In these particles, measured organic and inorganic water soluble masses were 7 +/- 1% and 75 +/- 12%, respectively, of the dried total particle mass (TPM). Non-sea-salt (nss) SO4=, NO3-, NH4+, and H+ were the major contributors to the mass and ionic equivalence of the particles, The ratio of the soluble organics (SumOrg) to nss SO4= was found to be a function of the TPM, which was similar to the simple relationship found over the northwestern Atlantic Ocean for altitudes <3 km. When the H+ ion was included, there was a good ionic balance between the cations and anions in the particles, The pH of the particles ranged from -2.4 to 0.20 (averaging -0.85). The particle volume size distribution dV/d log D shows distinct features according to the altitude and location of sample collection, In urban plumes, dV/d log D was significantly higher than at high altitudes and had a consistent accumulation mode peaking at 0.24 mu m. For all samples, nss SO4= and NH4+ comprised 59% of the accumulation mode particle mass on average. Samples showed two groups with high and low NH4+/nss SO4= ratios of 0.85 and 0.01, respectively. For the first group the low ambient relative humidities indicate that NH4+ and nss SO4= were in crystallized ammonium sulfate and letovicite in equilibrium with solution, while the second group was probably close to H2SO4 droplets. On the basis of these compositions the refractive index eta was found to be about 1.5 for the first group and <1.4 for the second group. The water contents of the NH4+ - nss SO4= particles were estimated to be 35 +/- 24%, leading to an average ratio of H2O/nss SO4= = 0.9 +/- 1.2. C1 BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP Li, SM (reprint author), ATMOSPHER ENVIRONM SERV, 4905 DUFFERIN ST, DOWNSVIEW, ON M3H 5T4, CANADA. NR 42 TC 25 Z9 25 U1 0 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-897X J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD SEP 20 PY 1997 VL 102 IS D17 BP 21341 EP 21353 DI 10.1029/97JD01310 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA XX380 UT WOS:A1997XX38000012 ER PT J AU Pack, RT Walker, RB Kendrick, BK AF Pack, RT Walker, RB Kendrick, BK TI Mechanisms of atomic and molecular recombination and collision-induced dissociation SO CHEMICAL PHYSICS LETTERS LA English DT Article ID 3-BODY RECOMBINATION; RATE CONSTANTS; SCATTERING; APPROXIMATION; POTENTIALS; HO AB Despite some evidence to the contrary, current chemical kinetics textbooks assume that atomic and molecular recombination and collision-induced dissociation (CID) occur only via sequences of two-body collisions. In this work an approximate quantum method treating all mechanisms simultaneously and on equal footing is used to calculate cross sections for the reaction Ne-2 + H reversible arrow Ne + Ne + H. The results provide the first clear quantum evidence that direct three-body as well as sequential two-body collision mechanisms do contribute significantly to recombination and CID. (C) 1997 Elsevier Science B.V. RP Pack, RT (reprint author), UNIV CALIF LOS ALAMOS NATL LAB,DIV THEORET T 12 MS B268,LOS ALAMOS,NM 87545, USA. NR 31 TC 19 Z9 19 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 SEP 19 PY 1997 VL 276 IS 3-4 BP 255 EP 262 DI 10.1016/S0009-2614(97)00879-8 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XY277 UT WOS:A1997XY27700013 ER PT J AU ZernikKobak, M Vasunia, K Connelly, M Anderson, CW Dixon, K AF ZernikKobak, M Vasunia, K Connelly, M Anderson, CW Dixon, K TI Sites of UV-induced phosphorylation of the p34 subunit of replication protein A from HeLa cells SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID SIMIAN VIRUS-40 DNA; NUCLEOTIDE EXCISION-REPAIR; BINDING-PROTEIN; A PHOSPHORYLATION; PURIFIED PROTEINS; POLYMERASE-ALPHA; SV40 ORIGIN; T-ANTIGEN; IN-VITRO; CYCLIN-A AB Exposure of mammalian cells to UV radiation alters gene expression and cell cycle progression; some of these responses may ensure survival or serve as mutation-avoidance mechanisms, lessening the consequences of UV-induced DNA damage, We showed previously that UV irradiation increases phosphorylation of the p34 subunit of human replication protein A (RPA) and that this hyperphosphorylation correlated with loss of activity of the DNA replication complex. To characterize further the role of RPA hyperphosphorylation in the cellular response to UV irradiation and to determine which protein kinases might be involved, we identified by phosphopeptide analysis the sites phosphorylated in the p34 subunit of RPA (RPA-p34) from HeLa cells before and after exposure to 30 J/m(2) UV light. In unirradiated HeLa cells, RPA-p34 is phosphorylated primarily at Ser-23 and Ser-29. At least four of the eight serines and one threonine in the N-terminal 33 residues of RPA-p34 can become phosphorylated after UV irradiation, Two of these sites (Ser-23 and Ser-29) ape known to be sites phosphorylated by Cdc2 kinase; two others (Thr-21 and Ser-33) are consensus sites for the DNA-dependent protein kinase (DNA-PK); the fifth site (Ser-11, -12, or -13) does not correspond to the (Ser/Thr)-Gln DNA-PK consensus, All five can be phosphorylated in vitro by incubating purified RPA with purified DNA-PK. Two additional sites, probably Ser-4 and Ser-8, are phosphorylated in vivo after UV irradiation and in vitro by purified DNA-PK. The capacity of purified DNA-PK to phosphorylate many of these same sites on RPA-p34 in vitro implicates DNA-PK or a kinase with similar specificity in the UV-induced hyperphosphorylation of RPA in vivo. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. RP ZernikKobak, M (reprint author), UNIV CINCINNATI,MED CTR,SCH MED,DEPT ENVIRONM HLTH,CINCINNATI,OH 45267, USA. FU NIEHS NIH HHS [ES05400, P30 ES06096]; NIGMS NIH HHS [GM52825] NR 51 TC 104 Z9 105 U1 0 U2 0 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD SEP 19 PY 1997 VL 272 IS 38 BP 23896 EP 23904 DI 10.1074/jbc.272.38.23896 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA XX381 UT WOS:A1997XX38100064 PM 9295339 ER PT J AU Hoberg, JO AF Hoberg, JO TI Formation of seven-membered oxacycles through ring expansion of cyclopropanated carbohydrates SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Article ID CLAISEN REARRANGEMENT; UNSATURATED SUGARS; NATURAL-PRODUCTS; ALLYLIC ALCOHOLS; COMPLEX; ETHERS; ISOLAUREPINNACIN; STEREOCHEMISTRY; DERIVATIVES; REDUCTION AB The cyclopropanation and ring expansion of 4,6-O-(di-tert-butylsilanediyl)-D-glucal (1) to produce oxepanes have been investigated. Using catalytic amounts of TMSOTf and an excess of a silylated nucleophile, a wide range of substituted oxepanes have been synthesized. Good to excellent yields are obtained; however, only modest diastereoselectivity resulted. This new methodology should provide convenient access into the synthesis of optically active oxepanes. RP Hoberg, JO (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 48 TC 53 Z9 53 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3263 J9 J ORG CHEM JI J. Org. Chem. PD SEP 19 PY 1997 VL 62 IS 19 BP 6615 EP 6618 DI 10.1021/jo970649v PG 4 WC Chemistry, Organic SC Chemistry GA XX490 UT WOS:A1997XX49000033 ER PT J AU Herrmannsfeldt, WB AF Herrmannsfeldt, WB TI Basic Responsibilities SO SCIENCE LA English DT Letter RP Herrmannsfeldt, WB (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD SEP 19 PY 1997 VL 277 IS 5333 BP 1745 EP 1745 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XX298 UT WOS:A1997XX29800002 ER PT J AU Sanchez, EJ Novotny, L Holtom, GR Xie, XS AF Sanchez, EJ Novotny, L Holtom, GR Xie, XS TI Room-temperature fluorescence imaging and spectroscopy of single molecules by two-photon excitation SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Letter ID TIME-RESOLVED SPECTROSCOPY; NEAR-FIELD; INDIVIDUAL MOLECULES; OPTICAL MICROSCOPY; DYNAMICS; ENZYME AB We report fluorescence imaging of single dye molecules on a glass substrate by two-photon excitation with femtosecond pulses from a mode-locked Ti:sapphire laser. The single-molecule images exhibit a high signal to background ratio (>30:1) and a high spatial resolution (fwhm < lambda/3). A quadratic intensity dependence of single-molecule emission rate is experimentally verified, and single-molecule emission spectra are recorded with two-photon excitation. A comparison of photobleaching rates is made between one-photon and two-photon excitation schemes. C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. PORTLAND STATE UNIV, DEPT PHYS, PORTLAND, OR 97207 USA. NR 33 TC 109 Z9 110 U1 3 U2 22 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD SEP 18 PY 1997 VL 101 IS 38 BP 7019 EP 7023 DI 10.1021/jp971915b PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XX153 UT WOS:A1997XX15300001 ER PT J AU Taylor, DP Hess, WP McCarthy, MI AF Taylor, DP Hess, WP McCarthy, MI TI Structure and energetics of the water/NaCl(100) interface SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID WATER-ADSORPTION; AB-INITIO; CORRELATION-ENERGY; NACL(100) SURFACE; SODIUM-CHLORIDE; HARTREE-FOCK; NACL; MOLECULES; SPECTRA; CHEMISTRY AB A series of correlation-corrected periodic Hartree-Fock (PHF) calculations have been performed to evaluate the structure of a single layer of water adsorbed on NaCl(100). This work was motivated by differing experimental observations which assign the water/NaCl interface structure as either a monolayer, with a single adsorbate binding site, or a 4x2 bilayer model. Quantum mechanical binding energies were computed for several adsorbate/surface geometries corresponding to 1x1 and 2x1 monolayer structures and 4x2 bilayer structures. The calculations indicate that the binding energy per water molecule for the monolayer and bilayer models are very similar; the estimated PHF and correlation-corrected binding energies are 10 and 14 kcal/mol, respectively, for both models. When measured per unit surface area the 4x2 bilayer is energetically favored because it has a 50% greater packing density than the monolayer. The computed binding energies are consistent with experiment. These data show that the monolayer structure may be stable (or metastable) at low water coverages, but as the coverage is increased the bilayer structures become more favorable. The quantum mechanical data imply that the structure of the water/NaCl interface will be very sensitive to the sample preparation and experimental techniques used. The calculated binding energies for the 4x2 water bilayer geometries reveal the existence of many local minima on the potential energy surface which could result in the domaining of water on the NaCl(100) surface. C1 PACIFIC NW NATL LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 42 TC 28 Z9 28 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5647 J9 J PHYS CHEM B JI J. Phys. Chem. B PD SEP 18 PY 1997 VL 101 IS 38 BP 7455 EP 7463 DI 10.1021/jp970567a PG 9 WC Chemistry, Physical SC Chemistry GA XX154 UT WOS:A1997XX15400018 ER PT J AU Rodriguez, JA AF Rodriguez, JA TI Interaction of hydrogen and thiophene with Ni/MoS2 and Zn/MoS2 surfaces: A molecular orbital study SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID SULFIDE HYDRODESULFURIZATION CATALYSTS; TRANSITION-METAL COMPLEXES; EFFECTIVE CORE POTENTIALS; PROMOTED SULFIDATION; INTERMEDIATE NEGLECT; CHEMICAL-PROPERTIES; SYNERGIC SYSTEMS; MO; CHEMISORPTION; ADSORPTION AB The effects of Ni and Zn on the electronic and chemical properties of MoS2 clusters have been investigated using INDO/S and ab initio SCF calculations. The deposition of Ni or Zn atoms on a series of clusters (Mo5S10, Mo6S12, Mo8S18, Mo9S18, MO12S24, and Mo18S36) that resemble the MoS2(0002)-S and MoS2(10 (1) over bar 0)-Mo surfaces produces a substantial reduction (0.5-2 eV) in the stability of the HOMOs of these systems. In all the cases examined, there was an admetal-->MoS2 charge transfer that increased the negative charge on S and reduced the positive charge on Mo. The electronic and chemical perturbations induced by Ni were much larger than those induced by Zn. Ab initio SCF results for Ni-promoted MoS2(10 (1) over bar 0)-Mo clusters showed a simultaneous increase in the electron density on Mo and in the reactivity of this metal toward H-2 and thiophene. On the (10 (1) over bar 0)-Mo surface, Ni facilitated the dissociation of H-2 by largely increasing the stability of the transition state and products for this reaction. The bonding interactions between MoS2(0002)-S clusters and H-2 or thiophene were weak. Ni and Zn adatoms enhanced the chemical activity of the (0002)-S surface by providing active sites for the dissociation of H-2 and the chemisorption of thiophene. The behavior of molybdenum sulfide catalysts in hydrogenation and hydrodesulfurization processes is discussed in light of these results. RP Rodriguez, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 74 TC 76 Z9 77 U1 4 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5647 J9 J PHYS CHEM B JI J. Phys. Chem. B PD SEP 18 PY 1997 VL 101 IS 38 BP 7524 EP 7534 DI 10.1021/jp971268o PG 11 WC Chemistry, Physical SC Chemistry GA XX154 UT WOS:A1997XX15400026 ER PT J AU Wu, HM Ratsep, M Jankowiak, R Cogdell, RJ Small, GJ AF Wu, HM Ratsep, M Jankowiak, R Cogdell, RJ Small, GJ TI Comparison of the LH2 antenna complexes of Rhodopseudomonas acidophila (strain 10050) and Rhodobacter sphaeroides by high-pressure absorption, high-pressure hole burning, and temperature-dependent absorption spectroscopies SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID BACTERIAL REACTION CENTERS; PRIMARY CHARGE SEPARATION; ENERGY-TRANSFER; OPTICAL-SPECTRA; PURPLE BACTERIA; BACTERIOCHLOROPHYLL-PROTEIN; RHODOSPIRILLUM-MOLISCHIANUM; PROSTHECOCHLORIS-AESTUARII; ELECTRONIC EXCITATION; DISPERSIVE KINETICS AB The cyclic (C-n) light harvesting 2 (LH2 or B800-850) complexes of Rps. acidophila (strain 10 050) and Rb. sphaeroides, isolated under identical conditions, are compared using the title spectroscopies. Thermal broadening and shifting data for the B850 absorption band reveal a structural change near 150 K for both species in the glycerol:water solvent used. The linear regions of thermal broadening above and below this temperature are shown to be consistent with dephasing via phonon-assisted relaxation between the B850 ring's exciton levels, which contribute to the B850 absorption band. The theoretical model used predicts, for both species, that the nearest neighbor coupling(s) between bacteriochlorophyll a (BChl a) molecules of the B850 ring is (are) significantly stronger, ca. 35%, for the low-temperature structures. Moreover, the linear thermal broadening rates of Rb. sphaeroides are significantly lower than those of Rps. acidophila for both the low-and high-temperature regions. Analysis of the difference in rates with the above model indicates that the nearest neighbor BChl a-BChl a coupling(s) is ca. 20% weaker for Rb. sphaeroides at all temperatures. The observation that the thermal shift rate for the B850 band of Rb. sphaeroides is 2.2 times smaller than that of Rps. acidophila is consistent with this weaker coupling. Pressure shift data for the B800 band indicate that the compressibility (kappa) for Rb. sphaeroides is significantly larger than for Rps. acidophila, suggesting that the weaker excitonic coupling between B850 molecules of Rb. sphaeroides stems, at least in part, from looser packing of its alpha,beta-polypeptide pairs. A higher kappa value for Rb. sphaeroides provides an explanation for the observation that the linear rates for pressure broadening and shifting of the B850 band for the two species are similar. Although the pressure-and temperature-dependent data for the B800 band of both species are consistent with weak excitonic coupling between nearest neighbor B800 molecules, the data for the B850 band (including pressure shifting of zero-phonon holes burned into the lowest exciton level of the B850 ring (B870)) require interpretation in terms of strong coupling. Although large, the pressure-shift rate for B870 holes burned on the high-energy side of the B870 band (-0.46 cm(-1)/MPa) is a factor of 1.3 lower than on the low-energy side. An interpretation for this variation in terms of energy disorder is given. Zero-phonon hole action spectra (4.2 K) for the B870 exciton level are presented that yield similar inhomogeneous widths for the B870 band of both species, similar to 120 cm(-1). For both species the apparent displacement of this band below the maximum of the B850 band is close to 200 cm(-1). A theoretical discussion of the relationship between the apparent displacement and excitonic level structure in the absence of energy disorder is given in the accompanying paper. C1 IOWA STATE UNIV,AMES LAB,US DOE,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. UNIV GLASGOW,INST BIOMED & LIFE SCI,DIV BIOCHEM & MOL BIOL,GLASGOW G12 8QQ,LANARK,SCOTLAND. NR 74 TC 87 Z9 90 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5647 J9 J PHYS CHEM B JI J. Phys. Chem. B PD SEP 18 PY 1997 VL 101 IS 38 BP 7641 EP 7653 DI 10.1021/jp9715134 PG 13 WC Chemistry, Physical SC Chemistry GA XX154 UT WOS:A1997XX15400041 ER PT J AU Wu, HM Ratsep, M Lee, IJ Cogdell, RJ Small, GJ AF Wu, HM Ratsep, M Lee, IJ Cogdell, RJ Small, GJ TI Exciton level structure and energy disorder of the B850 ring and the LH2 antennal complex SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID POLYVINYL-ALCOHOL FILMS; RHODOPSEUDOMONAS-ACIDOPHILA; RHODOBACTER-SPHAEROIDES; OPTICAL-SPECTRA; LOW-TEMPERATURE; CRESYL VIOLET; GLASSY FILMS; HOLE; BACTERIOCHLOROPHYLL; DYNAMICS AB Experimental and theoretical results are presented on the exciton level structure of the B850 ring of bacteriochlorophyll a molecules for the light-harvesting 2 (LH2) complex of Rhodopseudomonas acidophila (strain 10 050) and the effects of energy disorder (due to structural heterogeneity) on the level structure, The work is an outgrowth of the accompanying paper (Wu et al. J. Phys. Chem. B 1997, 1O1, 7641), which reports on the temperature and pressure dependencies of the LH2 absorption spectrum and the zero-phonon hole action spectrum of the lowest energy exciton level of the complex, B870, as well as the structural (nondenaturing) change of the complex near 150 K. The effects of energy disorder are analyzed using the theory of Wu and Small (Chem. Phys. 1997, 218, 225), which employs symmetry-adapted energy defect patterns. The analysis leads to a room temperature value of similar to 100 cm(-1) for the splitting between B870 and the adjacent, strongly allowed E-1 level in the absence of disorder. Using the temperature-dependent data of Wu et al., we arrive at a theoretical estimate for this splitting at temperatures below similar to 150 K of similar to 150 cm(-1) which is 50 cm(-1) smaller than the ''apparent'' value of 200 cm(-1) based on the 4.2 K B870 action spectrum. The 50 cm(-1) difference is explained in terms of a distribution of values for the energy disorder parameter(s), which leads to a distribution of values for the oscillator strength of B870. Hole-burning data on the temperature dependence of B870's optical dynamics are presented and analyzed. Below similar to 15 K the dynamics are dominated by two-level systems of the protein with an effective dephasing frequency that carries a T-alpha dependence with alpha approximate to 1.3. At temperatures above similar to 20 K the dephasing is strongly exponentially driven with an activation energy of similar to 100-140 cm(-1). A mechanism suggested for this dephasing is that it is due to upward scattering of the B870 level to the adjacent E-1 level by one-phonon absorption. New satellite hole spectra for the LH2 complex (isolated and chromatophores) are presented that lead to the assignment of the weak high-energy tail absorption of the B800 and B850 absorption bands to B850 exciton levels of the B850 ring, which are either symmetry forbidden or predicted to be very weakly absorbing in the absence of energy disorder. C1 IOWA STATE UNIV,AMES LAB,US DOE,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. DONGGUK UNIV,COLL NAT SCI,DEPT CHEM,KYONGJU CITY 780714,KYONGPOOK,SOUTH KOREA. UNIV GLASGOW,INST BIOMED & LIFE SCI,DIV BIOCHEM & MOL BIOL,GLASGOW G12 8QQ,LANARK,SCOTLAND. RI Lee, In-Ja/D-1546-2014 OI Lee, In-Ja/0000-0002-4569-892X NR 32 TC 90 Z9 94 U1 1 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5647 J9 J PHYS CHEM B JI J. Phys. Chem. B PD SEP 18 PY 1997 VL 101 IS 38 BP 7654 EP 7663 DI 10.1021/jp971514w PG 10 WC Chemistry, Physical SC Chemistry GA XX154 UT WOS:A1997XX15400042 ER PT J AU KrusinElbaum, L Lopez, D Thompson, JR Wheeler, R Ullmann, K Chu, CW Lin, WM AF KrusinElbaum, L Lopez, D Thompson, JR Wheeler, R Ullmann, K Chu, CW Lin, WM TI Superconductivity enhanced by Hg fission SO NATURE LA English DT Letter ID COLUMNAR DEFECTS; TEMPERATURE C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. OHIO STATE UNIV,COLUMBUS,OH 43210. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV HOUSTON,TEXAS CTR SUPERCONDUCT,HOUSTON,TX 77204. RP KrusinElbaum, L (reprint author), IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598, USA. NR 11 TC 15 Z9 15 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD SEP 18 PY 1997 VL 389 IS 6648 BP 243 EP 244 DI 10.1038/38415 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XW772 UT WOS:A1997XW77200028 ER PT J AU Ulrich, HD Mundroff, E Santarsiero, BD Driggers, EM Stevens, RC Schultz, PG AF Ulrich, HD Mundroff, E Santarsiero, BD Driggers, EM Stevens, RC Schultz, PG TI The interplay between binding energy and catalysis in the evolution of a catalytic antibody SO NATURE LA English DT Article ID OXY-COPE REARRANGEMENT; IMMUNE-RESPONSE; GERM-LINE; DIVERSITY; MECHANISM; GENES; VL; VH AB Antibody catalysis(1) provides an opportunity to examine the evolution of binding energy and its relation to catalytic function in a system that has many parallels with natural enzymes. Here we report such a study involving an antibody AZ-28 that catalyses an oxy-Cope rearrangement, a pericyclic reaction that belongs to a well studied and widely used class of reactions in organic chemistry(2). Immunization with transition state analogue 1 results in a germline-encoded antibody that catalyses the rearrangement of hexadiene 2 to aldehyde 3 with a rate approaching that of a related pericyclic reaction catalysed by the enzyme chorismate mutase(3). Affinity maturation gives antibody AZ-28, which has six amino acid substitutions, one of which results in a decrease in catalytic rate. To understand the relationship between binding and catalytic rate in this system we characterized a series of active-site mutants and determined the three-dimensional crystal structure of the complex of AZ-28 with the transition state analogue. This analysis indicates that the activation energy depends on a complex balance of several, stereoelectronic effects which are controlled by an extensive network of binding interactions in the active site, Thus in this instance the combinatorial diversity of the immune system provided both an efficient catalyst far a reaction where no enzyme is known, as well as an opportunity to explore the mechanisms and evolution of biological catalysis. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,HOWARD HUGHES MED INST,BERKELEY,CA 94720. RI Stevens, Raymond/K-7272-2015 OI Stevens, Raymond/0000-0002-4522-8725 NR 33 TC 74 Z9 75 U1 0 U2 8 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD SEP 18 PY 1997 VL 389 IS 6648 BP 271 EP 275 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XW772 UT WOS:A1997XW77200043 PM 9305839 ER PT J AU Nogga, A Huber, D Kamada, H Glockle, W AF Nogga, A Huber, D Kamada, H Glockle, W TI Triton binding energies for modern NN forces and the pi-pi exchange three-nucleon force SO PHYSICS LETTERS B LA English DT Article DE triton binding energy; three-nucleon forces; Faddeev calculations; two-nucleon correlation functions ID CHARGE-INDEPENDENCE BREAKING; PARTIAL-WAVE ANALYSIS; 3-NUCLEON FORCES; FADDEEV CALCULATIONS; CHIRAL LAGRANGIANS; MOMENTUM SPACE; MESON-EXCHANGE; GROUND-STATE; POTENTIALS; EQUATIONS AB We present high precision calculations for the triton binding energy using the most recent, phase equivalent realistic nucleon-nucleon (NN) potentials and the Tucson-Melbourne pi-pi three-nucleon force (3NF). That 3NF is included up to a total two-body angular momentum of j(max) = 6. It is shown that the inclusion of the 3NF slows down the convergence in the partial waves and j(max) = 5 is needed in order to achieve converged results within a few keV. We adjust the cut-off parameter Lambda in the form factors of the Tucson-Melbourne 3NF separately for the different NN potentials to the triton binding energy. This provides a set of phenomenological 3N Hamiltonians which can be tested in three-nucleon scattering and systems with A > 3. Their NN correlation functions are compared to each other. (C) 1997 Elsevier Science B.V. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. TH DARMSTADT,INST KERNPHYS,D-64289 DARMSTADT,GERMANY. RP Nogga, A (reprint author), RUHR UNIV BOCHUM,INST THEORET PHYS 2,D-44780 BOCHUM,GERMANY. RI Nogga, Andreas/A-3354-2008 OI Nogga, Andreas/0000-0003-2156-748X NR 45 TC 108 Z9 108 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD SEP 18 PY 1997 VL 409 IS 1-4 BP 19 EP 25 DI 10.1016/S0370-2693(97)00841-1 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA364 UT WOS:A1997YA36400004 ER PT J AU Kuhlmann, S Lai, HL Tung, WK AF Kuhlmann, S Lai, HL Tung, WK TI HERA events, tevatron jets, and uncertainties on quarks at large x SO PHYSICS LETTERS B LA English DT Article ID HIGH STATISTICS MEASUREMENT; INELASTIC MUON SCATTERING; INTRINSIC CHARM; HIGH Q2; PROTON; GLUON AB The recently reported excess of events at HERA compared to QCD calculations impels us to examine all possible Standard Model explanations before invoking ''new physics''. We explore the possibility of adding an unusual, but small, component of additional quarks at large x (beyond x > 0.75) as a way to increase the predicted SM cross-section in the HERA kinematic region by the QCD evolution feed-down effect. We describe various scenarios under which this can be achieved while maintaining good global fits to all established data sets. This implies a much larger SM uncertainty than commonly assumed. In addition, the modified parton distributions provide another possible mechanism to account for the CDF high-p(t) jet excess which occurs at similar x and Q(2) values. (C) 1997 Elsevier Science B.V. C1 MICHIGAN STATE UNIV,E LANSING,MI 48824. RP Kuhlmann, S (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 15 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD SEP 18 PY 1997 VL 409 IS 1-4 BP 271 EP 276 DI 10.1016/S0370-2693(97)00885-X PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA364 UT WOS:A1997YA36400040 ER PT J AU Duncan, A Eichten, E Thacker, H AF Duncan, A Eichten, E Thacker, H TI Electromagnetic structure of light baryons in lattice QCD SO PHYSICS LETTERS B LA English DT Article ID CHIRAL PERTURBATION-THEORY; QUARK MASSES AB A method for computing electromagnetic properties of hadrons in quenched lattice QCD is applied to the extraction of electromagnetic properties of the octet baryons. This allows a determination of the full dependence of the baryon masses on the charges and masses of the valence quarks. Results of a first numerical study (at beta = 5.7 with Wilson action and light quark masses fixed from the pseudoscalar meson spectrum) are reported. The quenched octet baryon isomultiplet splittings (with statistical errors) are found to be: N - P = 2.08(+/-0.56), Sigma(0) - Sigma(+) = 2.63(+/-0.39), Sigma(-) - Sigma(0) = 4.90(+/-0.36) and Xi(-) - Xi(0) = 5.58(+/-0.24) MeV. Estimates of the systematic electromagnetic corrections arising from finite volume are included in these results. (C) 1997 Elsevier Science B.V. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901. RP Duncan, A (reprint author), UNIV PITTSBURGH,DEPT PHYS & ASTRON,PITTSBURGH,PA 15620, USA. NR 10 TC 15 Z9 15 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD SEP 18 PY 1997 VL 409 IS 1-4 BP 387 EP 392 DI 10.1016/S0370-2693(97)00850-2 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA364 UT WOS:A1997YA36400058 ER PT J AU Esumi, S Heinz, U Xu, N AF Esumi, S Heinz, U Xu, N TI Collective flow or random walk? SO PHYSICS LETTERS B LA English DT Article ID HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; SPECTRA; PB+PB AB Using recently measured transverse momentum spectra from 158 AGeV/c Pb+Pb and 200 AGeV/c S+S collisions at the CERN SPS, we address the question whether the transverse motion of hadrons produced in ultra-relativistic heavy-ion collisions is due to random walk initial state collisions or due to multi-scattering induced collective flow. (C) 1997 Published by Elsevier Science B.V. C1 UNIV REGENSBURG,INST THEORET PHYS,D-93040 REGENSBURG,GERMANY. LOS ALAMOS NATL LAB,P25,LOS ALAMOS,NM 87545. RP Esumi, S (reprint author), UNIV HEIDELBERG,INST PHYS,PHILOSOPHENWEG 12,D-69120 HEIDELBERG,GERMANY. NR 23 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD SEP 18 PY 1997 VL 409 IS 1-4 BP 479 EP 482 DI 10.1016/S0370-2693(97)00858-7 PG 4 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA364 UT WOS:A1997YA36400072 ER PT J AU Yamanaka, SA Charych, DH Loy, DA Sasaki, DY AF Yamanaka, SA Charych, DH Loy, DA Sasaki, DY TI Solid phase immobilization of optically responsive liposomes in sol-gel materials for chemical and biological sensing SO LANGMUIR LA English DT Article ID INFLUENZA-VIRUS; SIALIC-ACID; VESICLES; ENCAPSULATION; ENTRAPMENT; MEMBRANES; PROTEINS; EXAMPLE; BEADS AB Liposomes enhanced with surface recognition groups have previously been found to have high affinity for heavy metal ions and virus particles with unique fluorescent and colorimetric responses, respectively. These lipid aggregate systems have now been successfully immobilized in a silica matrix via the sol-gel method, affording sensor materials that are robust, are easily handled, and offer optical clarity. The mild processing conditions allow quantitative entrapment of preformed liposomes without modification of the aggregate structure. Lipid extraction studies of immobilized nonpolymerized liposomes showed no lipid leakage in aqueous solution over a period of 3 months. Heavy metal fluorescent sensor materials prepared with 5% N-[8-[1-octadecyl-2-(9-(1-pyrenyl)nonyl)-rac-glyceroyl]-3,6-dioxaoctyl]iminodiacetic acid/distearylphosphatidylcholine liposomes exhibited a 4-50-fold enhancement in sensitivity to various metal ions compared to that of the Liposomes in free solution. Through ionic attraction the anionic silicate surface, at the experimental pH of 7.4, may act as a preconcentrator of divalent metal ions, boosting the gel's internal metal concentration. Entrapped sialic acid-coated polydiacetylene Liposomes responded with colorimetric signaling to influenza virus X31, although slower than the free Liposomes in solution. The successful transport of the virus (50-100 nm diameter) reveals a large pore diameter of the gel connecting the liposome to the bulk solution. The porous and durable silica matrix additionally provides a protective barrier to biological attack (bacterial, fungal) and allows facile recycling of the Liposome heavy metal sensor. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 30 TC 72 Z9 72 U1 2 U2 24 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD SEP 17 PY 1997 VL 13 IS 19 BP 5049 EP 5053 DI 10.1021/la970433o PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA XX089 UT WOS:A1997XX08900021 ER PT J AU Gibson, JK AF Gibson, JK TI Gas-phase, f-element organometallic chemistry: Reactions of cyclic hydrocarbons with Th+, U+, ThO+, UO+, and lanthanide ions, Ln(+) SO ORGANOMETALLICS LA English DT Article ID TRANSITION-METAL IONS; LASER-ABLATION; SANDWICH COMPLEXES; CATIONS; BOND; ACTIVATION; BENZENE; OXIDE; ETHYLENE; ENERGIES AB The extent of reaction of metal ions, M+, with organic molecules depends upon the electronic structure of the metal ion; in particular, the degree to which laser-ablated lanthanide ions, Ln(+) dehydrogenate hydrocarbons is known to reflect the energy needed to excite ground state Ln(+) to a divalent configuration. Reported here are gas-phase reactions of Ln(+) and AnO(n)(+) (An = Th, or U; n = 0 or 1) with C-6 and C-8 cyclic hydrocarbons, The reactivities of Ln(+) with c-C8H8+2m (m = 0, 2, or 4) were consistent with previous results for Ln(+) + c-C6H6+2m, in that the relative dehydrogenation efficiencies reflected the metal ion electronic structure and excitation energy. Additionally, the relatively strong bonding between Ln(+) and cyclooctatetraene (COT) was manifested as abundant condensation adduct, Ln(+)-COT. , The dehydrogenation reactivities of Th+ and U+ with both C-6 and C-8 cyclic hydrocarbons were found to be comparable to that of Ce+, the most reactive Ln(+), consistent with divalent An(+) electronic configurations and a dehydrogenation mechanism initiated by oxidative insertion of Anf into a C-H bond, The most conspicuous discrepancy between the actinide and lanthanide results was the significant dehydrogenation reactivities of the AnO(+), this in sharp contrast to essentially inert behavior of all LnO(+) studied. In view of the similarity between Ce and Th, the substantial reactivity of ThO+ in light of the inert behavior of CeO+ is particularly intriguing and suggests a central role of the metal center in the dehydrogenation process. The activity of the AnO(+) may reflect the distinctive nature of the 5f valence orbitals and could be partly attributable to relativistic effects. An ancillary result of the present investigation was the identification of several metal oxide clusters comprising uranium in multiple valence states. RP Gibson, JK (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,OAK RIDGE,TN 37831, USA. NR 49 TC 41 Z9 41 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD SEP 16 PY 1997 VL 16 IS 19 BP 4214 EP 4222 DI 10.1021/om970205p PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA XW951 UT WOS:A1997XW95100024 ER PT J AU Barenblatt, GI Beretta, E Bertsch, M AF Barenblatt, GI Beretta, E Bertsch, M TI The problem of the spreading of a liquid film along a solid surface: A new mathematical formulation SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article ID DEGENERATE PARABOLIC EQUATION; VISCOUS DROPLET; MOTION; DYNAMICS AB A new mathematical model is proposed for the spreading of a liquid film on a solid surface. The model is based on the standard lubrication approximation for gently sloping films (with the no-slip condition for the fluid at the solid surface) in the major part of the film where it is not too thin, In the remaining and relatively small regions near the contact lines it is assumed that the so-called autonomy principle holds-i.e., given the material components, the external conditions, and the velocity of the contact lines along the surface, the behavior of the fluid is identical for all films. The resulting mathematical model is formulated as a free boundary problem for the classical fourth-order equation for the film thickness, A class of self-similar solutions to this free boundary problem is considered. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. CNR,IST ANAL GLOBALE & APPLICAZ,I-50139 FLORENCE,ITALY. UNIV ROMA TOR VERGATA,DIPARTIMENTO MATEMAT,I-00163 ROME,ITALY. RP Barenblatt, GI (reprint author), UNIV CALIF BERKELEY,DEPT MATH,BERKELEY,CA 94720, USA. NR 32 TC 15 Z9 17 U1 3 U2 7 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD SEP 16 PY 1997 VL 94 IS 19 BP 10024 EP 10030 DI 10.1073/pnas.94.19.10024 PG 7 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XX399 UT WOS:A1997XX39900006 PM 11038574 ER PT J AU Milgram, KE White, FM Goodner, KL Watson, CH Koppenaal, DW Barinaga, CJ Smith, BH Winefordner, JD Marshall, AG Houk, RS Eyler, JR AF Milgram, KE White, FM Goodner, KL Watson, CH Koppenaal, DW Barinaga, CJ Smith, BH Winefordner, JD Marshall, AG Houk, RS Eyler, JR TI High resolution inductively coupled plasma Fourier transform ion cyclotron resonance mass spectrometry SO ANALYTICAL CHEMISTRY LA English DT Article ID GLOW-DISCHARGE; INTERFERENCES; EXCITATION; GUIDE; ATTENUATION; PERFORMANCE; IONIZATION; SELECTION; SAMPLES; ARGON AB Initial results obtained by incorporation of an inductively coupled plasma (ICP) ion source with a Fourier transform ion cyclotron resonance (FTICR) mass spectrometer are reported, along with spectra which demonstrate submilligram-per-liter detection limits and high mass resolution (mass resolving power, m/Delta m(10%V) = 7000-10 000), Also shown is an ICP-FTICR spectrum with ultrahigh resolving power (m/Delta m(10%V) = 88 000). Both instrumental configurations used to conduct this work, one at the University of Florida, and the other at the National High Magnetic Field Laboratory, are described. Also included are concise results from a computer aided interference study designed to enumerate mass spectral interferences requiring mass resolving power in excess of 10 000. C1 UNIV FLORIDA, DEPT CHEM, GAINESVILLE, FL 32611 USA. FLORIDA STATE UNIV, DEPT CHEM, TALLAHASSEE, FL 32310 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NATL HIGH MAGNET FIELD LAB, TALLAHASSEE, FL 32310 USA. IOWA STATE UNIV, DEPT CHEM, US DEPT ENERGY, AMES LAB, AMES, IA 50011 USA. NR 57 TC 32 Z9 32 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 15 PY 1997 VL 69 IS 18 BP 3714 EP 3721 DI 10.1021/ac970126n PG 8 WC Chemistry, Analytical SC Chemistry GA XV712 UT WOS:A1997XV71200011 ER PT J AU Savina, MR Lykke, KR AF Savina, MR Lykke, KR TI Microscopic chemical imaging with laser desorption mass spectrometry SO ANALYTICAL CHEMISTRY LA English DT Article ID MULTIPHOTON IONIZATION; SPUTTERED NEUTRALS; ION-BEAMS; FEMTOSECOND; POSTIONIZATION; MOLECULES; PHOTOIONIZATION; DISSOCIATION; PULSES AB Mass spectrometric chemical images of surfaces were obtained using a laser desorption/laser postionization time-of-flight mass spectrometer. Using a single laser to both desorb and ionize surface species results in a large variability in the ion signal as the laser is rastered from spot to spot on the surface. The variation is greatly reduced when the detected species are photoionized desorbed neutrals rather than ions produced directly by the desorption laser. A Schwarzschild microscope mounted outside of the vacuum chamber is used to focus the desorption laser on the sample. Ion dispersion and defection are accomplished by a simple time-of-flight mass analyzer. The spatial resolution of the system is on the order of 1 mu m. The design and use of the imaging laser microprobe mass spectrometer are presented, along with images of organic and inorganic surfaces. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP Savina, MR (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 28 TC 14 Z9 14 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 15 PY 1997 VL 69 IS 18 BP 3741 EP 3746 DI 10.1021/ac970115u PG 6 WC Chemistry, Analytical SC Chemistry GA XV712 UT WOS:A1997XV71200014 ER PT J AU Arlinghaus, HF Kwoka, MN Jacobson, KB AF Arlinghaus, HF Kwoka, MN Jacobson, KB TI Analysis of biosensor chips for identification of nucleic acids SO ANALYTICAL CHEMISTRY LA English DT Article ID RESONANCE IONIZATION SPECTROSCOPY; TUNABLE VUV RADIATION; MASS-SPECTROMETRY; GLASS SUPPORTS; HYBRIDIZATION; DNA; OLIGONUCLEOTIDES; SEMICONDUCTORS; MONOLAYERS; ARRAYS AB Two novel DNA-sequencing methods are described that use DNA hybridization biosensor chips. These two techniques involve either labeling the free nucleic acid with enriched stable isotopes or hybridizing DNA without labels to immobilized peptide nucleic acid (PNA) and detecting the phosphorus present in the DNA but not in the PNA. Sputter-initiated resonance ionization microprobe analysis was used to detect the presence of enriched tin isotope-labeled DNA and of phosphorus in natural DNA as a means to identify the presence of DNA after hybridization to oligodeoxynucleotides (ODNs) or PNAs, respectively, immobilized on a biosensor chip. The data clearly demonstrate that excellent discrimination between complementary and noncomplementary sequences can be obtained during hybridization of DNA to either ODNs or PNAs. The capability to detect different enriched stable isotope-labeled DNAs simultaneously allows high degrees of multiplexing which may be very advantageous for hybridization kinetics studies in complex systems, as well as significantly increasing the speed of analysis. Alternatively, by using natural DNA with PNA biosensor chips, discrimination for single-point mutation could be increased because of improved hybridization kinetics and direct analysis of genomic DNA may become possible without amplification, Both methods have the potential to provide a rapid method for DNA/RNA sequencing, diagnostics, and mapping. C1 OAK RIDGE NATL LAB,LIFE SCI RES DIV,OAK RIDGE,TN 37831. RP Arlinghaus, HF (reprint author), ATOM SCI INC,OAK RIDGE,TN 37830, USA. FU NCI NIH HHS [1 R43 CA66525-01] NR 39 TC 57 Z9 62 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 15 PY 1997 VL 69 IS 18 BP 3747 EP 3753 DI 10.1021/ac970267p PG 7 WC Chemistry, Analytical SC Chemistry GA XV712 UT WOS:A1997XV71200015 PM 9302874 ER PT J AU Stephenson, JL McLuckey, SA AF Stephenson, JL McLuckey, SA TI Anion effects on storage and resonance ejection of high mass-to-charge cations in quadrupole ion trap mass spectrometry SO ANALYTICAL CHEMISTRY LA English DT Article ID PROTON-TRANSFER REACTIONS; ELECTROSPRAY IONIZATION; GAS-PHASE; PRINCIPLES; PROTEINS AB The presence of negative charge created by an anion cloud in the center of a quadrupole ion trap is shown to be capable of affecting both the storage and the resonance ejection of high mass-to-charge cations. The attractive potential created by the presence of the anion cloud in the center of the ion trap can facilitate storage of high mass-to-charge cations under conditions that otherwise would allow the cations to escape. However, the presence of the anion cloud can interfere with the resonance ejection method for mass analysis due to the fact that the electric field created by the anion cloud can rival or exceed the influence of the quadrupole field on cation motion. Recognizing these phenomena allows for optimum conditions to be established for both ion storage and resonance ejection of high mass-to-charge ions formed via ion-ion reactions. The effect of high numbers of anions on the storage and resonance ejection of high mass-to-charge cations is illustrated with low charge state cations derived from ovalbumin and lysozyme formed via proton transfer reactions to anions derived from perfluoro-1,3-dimethylcyclohexane. C1 OAK RIDGE NATL LAB, DIV CHEM & ANALYT SCI, OAK RIDGE, TN 37831 USA. RI Stephenson, James/A-9262-2009; McLuckey, Scott/B-2203-2009 OI McLuckey, Scott/0000-0002-1648-5570 NR 32 TC 30 Z9 31 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 15 PY 1997 VL 69 IS 18 BP 3760 EP 3766 DI 10.1021/ac970399i PG 7 WC Chemistry, Analytical SC Chemistry GA XV712 UT WOS:A1997XV71200017 ER PT J AU Chambers, DM Grace, LI Andresen, BD AF Chambers, DM Grace, LI Andresen, BD TI Development of an ion store time-of-flight mass spectrometer for the analysis of volatile compounds in air SO ANALYTICAL CHEMISTRY LA English DT Article ID FILTERED-NOISE FIELDS; ORGANIC-COMPOUNDS; ATMOSPHERIC-PRESSURE; GAS-CHROMATOGRAPHY; ORTHOGONAL-ACCELERATION; MEMBRANE INTRODUCTION; TRAP; IONIZATION; DISCHARGE; PRECONCENTRATION AB A time-of-flight mass spectrometer (TOF-MS) that incorporates an ion storage trap as a pulsed extraction source and sample preconcentrator has been developed for air monitoring, This new instrument configuration is designed for real-time monitoring of changes in trace volatile and semivolatile compound concentrations in air. Typically, detection limits are in the low parts per billion (v/v) range. This ion store/TOF-MS configuration permits. a relatively large volume air flux to be drawn directly into the ion trap cavity, creating a local pressure that exceeds 10(-4) Torr. Operating the ion trap at this pressure increases the extent of chemical ionization with the abundant N2- and O2+ that are formed by electron impact The air background also serves as a suitable collisional damping matrix, helping to compress the ion cloud to the center of the trap, which is ideal for TOF-MS analysis. Ions are typically accumulated in the trap for 400 ms, at which point they are extracted through the exit end cap and analyzed within 100 ps, thus yielding a duty cycle near 100%. The necessary hardware and electronics configuration needed to obtain optimum resolution (routinely 2000 m/Delta m, fwhm), mass accuracy and sensitivity is described. RP Chambers, DM (reprint author), LAWRENCE LIVERMORE NATL LAB,FORENS SCI CTR,LIVERMORE,CA 94551, USA. NR 57 TC 30 Z9 32 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 15 PY 1997 VL 69 IS 18 BP 3780 EP 3790 DI 10.1021/ac970102g PG 11 WC Chemistry, Analytical SC Chemistry GA XV712 UT WOS:A1997XV71200020 ER PT J AU Feiertag, G Ehrfeld, W Freimuth, H Kolle, H Lehr, H Schmidt, M Sigalas, MM Soukoulis, CM Kiriakidis, G Pedersen, T Kuhl, J Koenig, W AF Feiertag, G Ehrfeld, W Freimuth, H Kolle, H Lehr, H Schmidt, M Sigalas, MM Soukoulis, CM Kiriakidis, G Pedersen, T Kuhl, J Koenig, W TI Fabrication of photonic crystals by deep x-ray lithography SO APPLIED PHYSICS LETTERS LA English DT Article ID BAND-GAP CRYSTALS; PROPAGATION; LASER AB We have developed a new microfabrication technique for the construction of three-dimensional photonic crystals. In particular, we used multiple tilted x-ray lithography exposures in order to construct structures with photonic band gaps in the infrared region. First polymethylmethacrylate (PMMA) resist layers with a thickness of 500 mu m were irradiated, then the holes in the resist structure were filled with preceramic polymer and subsequent pyrolysis converts the preceramic polymer into a SiCN ceramic. Theoretical results with fitted values of the dielectric constant are in good agreement with the transmission measurements. (C) 1997 American Institute of Physics. C1 IOWA STATE UNIV,AMES LAB,AMES,IA 50011. IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011. FDN RES & TECHNOL HELLAS,IRAKLION,CRETE,GREECE. MAX PLANCK INST FESTKORPERFORSCH,D-70506 STUTTGART,GERMANY. RP Feiertag, G (reprint author), INST MICROTECHNOL MAINZ GMBH,CARL ZEISS STR 18-20,D-55129 MAINZ,GERMANY. RI Kiriakidis, George/G-9685-2011; Soukoulis, Costas/A-5295-2008 NR 25 TC 111 Z9 110 U1 0 U2 18 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 15 PY 1997 VL 71 IS 11 BP 1441 EP 1443 DI 10.1063/1.120431 PG 3 WC Physics, Applied SC Physics GA XV726 UT WOS:A1997XV72600001 ER PT J AU Kortright, JB Kim, SK Warwick, T Smith, NV AF Kortright, JB Kim, SK Warwick, T Smith, NV TI Soft x-ray circular polarizer using magnetic circular dichroism at the Fe L-3 line SO APPLIED PHYSICS LETTERS LA English DT Article ID SYNCHROTRON-RADIATION; ANISOTROPY; REGION; FILMS AB Linearly polarized soft x-rays are converted to elliptical polarization at the Fe L-3 line (707 eV) using magnetic circular dichroism (MCD) on transmission through thin Fe films. A linear polarizer measured the transmitted polarization at different incidence angles to vary as expected from a model for in-plane magnetization, and also to exhibit a weak MCD effect at normal incidence interpreted to originate from perpendicular interface anisotropy. An MCD signal from a downstream Fe film was produced by switching the helicity of x-rays transmitted through an upstream circular polarizer. Practical considerations for optimizing the production of circular polarization are discussed, and synchrotron radiation applications using these circular polarizing filters are suggested. RP Kortright, JB (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DIV SCI MAT,BERKELEY,CA 94720, USA. RI Kim, Sang-Koog/J-4638-2014 NR 19 TC 13 Z9 15 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 15 PY 1997 VL 71 IS 11 BP 1446 EP 1448 DI 10.1063/1.119932 PG 3 WC Physics, Applied SC Physics GA XV726 UT WOS:A1997XV72600003 ER PT J AU Mungan, CE Buchwald, MI Edwards, BC Epstein, RI Gosnell, TR AF Mungan, CE Buchwald, MI Edwards, BC Epstein, RI Gosnell, TR TI Internal laser cooling of Yb3+-doped glass measured between 100 and 300 K SO APPLIED PHYSICS LETTERS LA English DT Article ID FREQUENCY UP-CONVERSION; CONDENSED-PHASE AB Laser cooling of a solid can occur when it emits photons of higher mean energy than those it absorbs. Photothermal deflection spectra of a fluorozirconate glass (ZBLANP) doped with 1 wt% Yb3+ show cooling in an internal volume of the sample at temperatures between 100 and 300 K. A cooling efficiency of similar to 1% relative to the absorbed laser power at 1015 nm is maintained at all temperatures. The results show promise for solid-state cooling of bulk materials at temperatures below 150 K. (C) 1997 American Institute of Physics. RP Mungan, CE (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 14 TC 36 Z9 36 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 15 PY 1997 VL 71 IS 11 BP 1458 EP 1460 DI 10.1063/1.120441 PG 3 WC Physics, Applied SC Physics GA XV726 UT WOS:A1997XV72600007 ER PT J AU Smith, DJ Modak, AR Rabedeau, TA Parkin, SSP AF Smith, DJ Modak, AR Rabedeau, TA Parkin, SSP TI Growth and structural characterization of highly oriented sputter-deposited (111), (110), and (100) Co/Cu superlattices SO APPLIED PHYSICS LETTERS LA English DT Article ID X-RAY; MAGNETORESISTANCE; MULTILAYERS AB Highly oriented, sputter-deposited (111), (110), and (100) Co/Cu superlattices have been grown simultaneously on substrates of Al2O3 (sapphire), MgO (110), and (100), respectively, using thin seed layers of Pt or Pd deposited at similar to 500 degrees C. High-resolution electron microscopy and x-ray scattering demonstrate that the films are epitaxial and of excellent crystallinity. (C) 1997 American Institute of Physics. C1 STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. IBM CORP,ALMADEN RES CTR,DIV RES,SAN JOSE,CA 95120. ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287. RP Smith, DJ (reprint author), ARIZONA STATE UNIV,CTR SOLID STATE SCI,TEMPE,AZ 85287, USA. RI Parkin, Stuart/D-2521-2012 NR 14 TC 8 Z9 9 U1 0 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 15 PY 1997 VL 71 IS 11 BP 1480 EP 1482 DI 10.1063/1.119942 PG 3 WC Physics, Applied SC Physics GA XV726 UT WOS:A1997XV72600015 ER PT J AU Chen, WZ Westhoff, R Reif, R AF Chen, WZ Westhoff, R Reif, R TI Determination of optical constants of strained Si1-xGex epitaxial layers in the spectral range 0.75-2.75 eV SO APPLIED PHYSICS LETTERS LA English DT Article ID SPECTROSCOPIC ELLIPSOMETRY; WELLS AB Optical characterization of strained Si1-xGex (0 11 kb) very similar to that reported for the mouse SMCC gene. Using a variety of human-rodent somatic cell hybrid and radiation hybrid mapping panels, the human SMCC gene was mapped to a genomic interval of less than 1.32 Mb in 19p13.2. These results provide new information concerning the regulation of SMCC gene expression and demonstrate the utility of two human SMC lines for the further characterization of this gene's expression control. The identification of a BAC harboring the entire human SMCC locus represents an important reagent for future analysis of SMCC regulatory sequences. Finally, the localization of SMCC to a defined genomic interval will facilitate an analysis of its potential as a candidate gene for disease phenotypes mapping to 19p13.2. (C) 1997 Elsevier Science B.V. C1 UNIV HELSINKI,DEPT MED GENET,HAARTMAN INST,FIN-00014 HELSINKI,FINLAND. LAWRENCE LIVERMORE NATL LAB,HUMAN GENOME CTR L450,LIVERMORE,CA 94550. UNIV TEXAS,SW MED CTR,HAMON CTR BASIC CANC RES,DALLAS,TX 75235. RP Miano, JM (reprint author), MED COLL WISCONSIN,DEPT PHYSIOL,CARDIOVASC RES CTR,8701 WATERTOWN PLANK RD,MILWAUKEE,WI 53226, USA. NR 43 TC 15 Z9 16 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1119 J9 GENE JI Gene PD SEP 15 PY 1997 VL 197 IS 1-2 BP 215 EP 224 DI 10.1016/S0378-1119(97)00265-5 PG 10 WC Genetics & Heredity SC Genetics & Heredity GA XX866 UT WOS:A1997XX86600026 PM 9332369 ER PT J AU Selkov, E Maltsev, N Olsen, GJ Overbeek, R Whitman, WB AF Selkov, E Maltsev, N Olsen, GJ Overbeek, R Whitman, WB TI A reconstruction of the metabolism of Methanococcus jannaschii from sequence data (Reprinted from Gene-Combis, vol 197, pg GC11-GC26, 1997) SO GENE LA English DT Reprint ID METHANOGENIC BACTERIA; METHANOBACTERIUM-THERMOAUTOTROPHICUM; PYROCOCCUS-FURIOSUS; C-13 NMR; BIOSYNTHESIS; PATHWAY; VOLTAE; SODIUM; ARCHAEBACTERIA; PURIFICATION C1 UNIV ILLINOIS,DEPT MICROBIOL,CHAMPAIGN,IL 61801. UNIV GEORGIA,DEPT MICROBIOL,ATHENS,GA 30602. RP Selkov, E (reprint author), ARGONNE NATL LAB,DIV MATH & COMP SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 44 TC 66 Z9 67 U1 1 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1119 J9 GENE JI Gene PD SEP 15 PY 1997 VL 197 IS 1-2 BP GC11 EP GC26 DI 10.1016/S0378-1119(97)00307-7 PG 16 WC Genetics & Heredity SC Genetics & Heredity GA XX866 UT WOS:A1997XX86600053 PM 9332394 ER PT J AU Balow, JE Shelton, DA Orsborn, A Mangelsdorf, M Aksentijevich, I Blake, T Sood, R Gardner, D Liu, R Pras, E Levy, EN Centola, M Deng, ZM Zaks, N Wood, G Chen, XG Richards, N Shohat, M Livneh, A Pras, M Doggett, NA Collins, FS Liu, PP Rotter, JI FischelGhodsian, N Gumucio, D Richards, RI Kastner, DL AF Balow, JE Shelton, DA Orsborn, A Mangelsdorf, M Aksentijevich, I Blake, T Sood, R Gardner, D Liu, R Pras, E Levy, EN Centola, M Deng, ZM Zaks, N Wood, G Chen, XG Richards, N Shohat, M Livneh, A Pras, M Doggett, NA Collins, FS Liu, PP Rotter, JI FischelGhodsian, N Gumucio, D Richards, RI Kastner, DL TI A high-resolution genetic map of the familial Mediterranean fever candidate region allows identification of haplotype-sharing among ethnic groups SO GENOMICS LA English DT Article ID LINKAGE DISEQUILIBRIUM; COLCHICINE THERAPY; ASHKENAZI JEWS; DOUBLE-BLIND; SHORT ARM; CHROMOSOME-16; AMYLOIDOSIS; POPULATIONS; INHERITANCE; FREQUENCY AB Familial Mediterranean fever (FMF) is a recessive disorder of inflammation caused by mutations in a gene (designated MEFV) on chromosome 16p13.3, We have recently constructed a 1-Mb cosmid contig that includes the FMF critical region. Here we show genotype data for 12 markers from our physical map, including 5 newly identified microsatellites, in FMF families. Intrafamilial recombinations placed MEFV in the similar to 285 kb between D16S468/D16S3070 and D16S3376. We observed significant linkage disequilibrium in the North African Jewish population, and historical recombinants in the founder haplotype placed MEFV between D16S3082 and D16S3373 (similar to 200 kb). In smaller panels of Iraqi Jewish, Arab, and Armenian families, there were significant allelic associations only for D16S3370 and D16S2617 among the Armenians. A sizable minority of Iraqi Jewish and Armenian carrier chromosomes appeared to be derived from the North African Jewish ancestral haplotype. We observed a unique FMF haplotype common to Iraqi Jews, Arabs, and Armenians and two other haplotypes restricted to either the Iraqi Jewish or the Armenian population. These data support the view that a few major mutations account for a large percentage of the cases of FMF and suggest that same of these mutations arose before the affected Middle Eastern populations diverged from one another. (C) 1997 Academic Press. C1 NIAMSD,ARTHRIT & RHEUMATISM BRANCH,BETHESDA,MD 20892. GEORGE WASHINGTON UNIV,GRAD PROGRAM GENET,WASHINGTON,DC 20052. UNIV MICHIGAN,DEPT ANAT & CELL BIOL,ANN ARBOR,MI 48109. ADELAIDE WOMENS & CHILDRENS HOSP,DEPT CYTOGENET & MOL GENET,ADELAIDE,SA 5006,AUSTRALIA. NATL HUMAN GENOME RES INST,LAB GENE TRANSFER,BETHESDA,MD 20892. CHAIM SHEBA MED CTR,DEPT MED C,IL-52621 TEL HASHOMER,ISRAEL. CEDARS SINAI MED CTR,DEPT PEDIAT,LOS ANGELES,CA 90048. CEDARS SINAI MED CTR,DEPT MED GENET,LOS ANGELES,CA 90048. BEILINSON MED CTR,DEPT MED GENET,IL-49100 PETAH TIQWA,ISRAEL. CHAIM SHEBA MED CTR,HELLER INST MED RES,IL-52621 TEL HASHOMER,ISRAEL. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87545. RI Liu, Paul/A-7976-2012; Mangelsdorf, Marie/A-2318-2013 OI Liu, Paul/0000-0002-6779-025X; Mangelsdorf, Marie/0000-0002-7855-7701 FU NIAMS NIH HHS [P60 AR20557] NR 30 TC 34 Z9 35 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD SEP 15 PY 1997 VL 44 IS 3 BP 280 EP 291 DI 10.1006/geno.1997.4860 PG 12 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA XY274 UT WOS:A1997XY27400004 PM 9325049 ER PT J AU Kleinman, LI Daum, PH Lee, JH Lee, YN Nunnermacker, LJ Springston, SR Newman, L WeinsteinLloyd, J Sillman, S AF Kleinman, LI Daum, PH Lee, JH Lee, YN Nunnermacker, LJ Springston, SR Newman, L WeinsteinLloyd, J Sillman, S TI Dependence of ozone production on NO and hydrocarbons in the troposphere SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID PHOTOCHEMISTRY; ATMOSPHERE; MODEL AB An expression for the production rate of O-3, P(O-3), is derived based on a radical budget equation applicable to low and high NO, conditions. Differentiation of this equation with respect to NO or hydrocarbons (HC) gives an approximate analytic formula in which the relative sensitivity of P(O-3) to changes in NO or HC depends only on the fraction of radicals which are removed by reactions with NOx. This formula is tested by comparison with results from a photochemical calculation driven by trace gas observations from the 1995 Southern Oxidants Study (SOS) campaign in Nashville, Tennessee. C1 SUNY COLL OLD WESTBURY,DEPT CHEM PHYS,OLD WESTBURY,NY 11568. UNIV MICHIGAN,DEPT ATMOSPHER OCEAN & SPACE SCI,ANN ARBOR,MI 48109. RP Kleinman, LI (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,ENVIRONM CHEM DIV,UPTON,NY 11973, USA. OI Sillman, Sanford/0000-0001-6250-1191 NR 15 TC 86 Z9 86 U1 4 U2 20 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD SEP 15 PY 1997 VL 24 IS 18 BP 2299 EP 2302 DI 10.1029/97GL02279 PG 4 WC Geosciences, Multidisciplinary SC Geology GA XW963 UT WOS:A1997XW96300010 ER PT J AU Jones, MD Ortiz, G Ceperley, DM AF Jones, MD Ortiz, G Ceperley, DM TI Many-body approaches to atoms and molecules in external magnetic fields SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article; Proceedings Paper CT Workshop on the Properties of Molecules in Strong Magnetic Fields CY OCT, 1996 CL GAINESVILLE, FL ID HARTREE-FOCK CALCULATIONS; QUANTUM MONTE-CARLO; HYDROGENLIKE GAS; WAVE-FUNCTIONS; H-ION; SUPERFLUIDITY; SPECTRUM; SYSTEMS; CHAINS; STATES AB The proper treatment of many-body effects for fermions has long been a goal of theorists working in atomic and molecular physics. The computational demands of such a treatment, however, when coupled to the added difficulties imposed by the presence of external electromagnetic sources, have resulted in few studies Of many-body effects in strong magnetic fields, i.e., in the field regime where perturbation theory is no longer applicable. In this article, we review the fundamental aspects of the problem and describe a variety of theoretical approaches for small atoms and molecules in strong fields, beginning with mean-field theory (Hartree-Fock) and progressing through variational and exact stochastic methods. (C) 1997 John Wiley & Sons, Inc. C1 LOS ALAMOS NATL LAB,DIV THEORET,T 11 B262,LOS ALAMOS,NM 87545. UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801. RI Ceperley, David/A-6858-2008 NR 46 TC 16 Z9 16 U1 1 U2 3 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0020-7608 J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PD SEP 15 PY 1997 VL 64 IS 5 BP 523 EP 552 DI 10.1002/(SICI)1097-461X(1997)64:5<523::AID-QUA5>3.0.CO;2-Y PG 30 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA XT138 UT WOS:A1997XT13800004 ER PT J AU Kendrick, B AF Kendrick, B TI The effects of pseudomagnetic fields in molecular spectra and scattering SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article; Proceedings Paper CT Workshop on the Properties of Molecules in Strong Magnetic Fields CY OCT, 1996 CL GAINESVILLE, FL ID POTENTIAL-ENERGY SURFACES; QUANTUM REACTIVE SCATTERING; GEOMETRIC PHASE; THEORETICAL CHARACTERIZATION; CONICAL INTERSECTION; MAGNETIC-FIELD; WAVE-FUNCTIONS; BOUND-STATES; GROUND-STATE; UNIMOLECULAR DISSOCIATION AB Pseudomagnetic fields appear in the Born-Oppenheimer method for molecules when conical intersections or electronic angular momenta are taken into account. These fields are not real magnetic fields but they have the same mathematical properties and can lead to real observable effects in the dynamics of molecules. A general vector potential (gauge theory) approach for including these field effects in the Born-Oppenheimer method is introduced and applied to H + O-2 scattering and the vibrational spectrum of Na-3(X) for zero total angular momentum (J = 0). The scattering results for HO2 show significant shifts in the resonance energies and lifetimes due to a ''magnetic solenoid''-type field originating from the C-2v conical intersection in HO2. Significant changes in the state-to-state transition probabilities are also observed. The nondegenerate A(1) and A(2) vibrational spectra of Na-3(X) show significant shifts in the energy levels due to a ''magnetic solenoid''-type field originating from the D-3h conical intersection in Na-3. These two examples show that the effects of pseudomagnetic fields can be significant and in many cases they must be included to obtain agreement between theory and experiment. The newly developed gauge theory techniques for treating pseudomagnetic fields are also relevant for including the effects of real magnetic fields. (C) 1997 John Wiley & Sons, Inc. RP LOS ALAMOS NATL LAB, MS B268, T12, DIV THEORET, POB 1663, LOS ALAMOS, NM 87545 USA. NR 79 TC 15 Z9 15 U1 0 U2 3 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0020-7608 EI 1097-461X J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PD SEP 15 PY 1997 VL 64 IS 5 BP 581 EP 597 PG 17 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA XT138 UT WOS:A1997XT13800008 ER PT J AU Solem, JC Sheppard, MG AF Solem, JC Sheppard, MG TI Experimental quantum chemistry at ultrahigh magnetic fields: Some opportunities SO INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY LA English DT Article; Proceedings Paper CT Workshop on the Properties of Molecules in Strong Magnetic Fields CY OCT, 1996 CL GAINESVILLE, FL AB We discuss the opportunities for experiments in quantum chemistry and molecular physics at magnetic fields in excess of 100 Tesla. In a multinational collaboration, scientists at Los Alamos National Laboratory have led a campaign of experiments using explosively driven generators with peak fields between 130 and 1000 Tesla. Most of these experiments explored quantum-limit phenomena. We expect to conduct a similar campaign in the spring of 1997. We are also planning experiments with several reusable laboratory facilities: (1) the Pegasus high-energy-density facility, an operating 4 MJ fast capacitor bank system, which should be capable of reaching fields of 600 Tesla in practical experimental volumes; (2) the 100 Tesla nondestructive magnet, which is expected to be in operation by 1998; and (3) the Atlas facility, 38 MJ fast capacitor bank system, which should be capable of reaching fields of 1800 Tesla in practical experimental volumes. Atlas should be in operation by 1999. We also discuss some of the experimental techniques developed for both physics and chemistry experiments at high magnetic fields. (C) 1997 John Wiley & Sons, Inc. RP Solem, JC (reprint author), LOS ALAMOS NATL LAB,THEORET DIV MSB 210,POB 1663,LOS ALAMOS,NM 87545, USA. NR 18 TC 3 Z9 3 U1 1 U2 2 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0020-7608 J9 INT J QUANTUM CHEM JI Int. J. Quantum Chem. PD SEP 15 PY 1997 VL 64 IS 5 BP 619 EP 628 DI 10.1002/(SICI)1097-461X(1997)64:5<619::AID-QUA13>3.0.CO;2-Y PG 10 WC Chemistry, Physical; Mathematics, Interdisciplinary Applications; Physics, Atomic, Molecular & Chemical SC Chemistry; Mathematics; Physics GA XT138 UT WOS:A1997XT13800012 ER PT J AU Hebner, GA Fleddermann, CB AF Hebner, GA Fleddermann, CB TI Characterization of pulse-modulated inductively coupled plasmas in argon and chlorine SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTRON; DISCHARGES; DENSITIES; DEPOSITION; BREAKDOWN AB The characteristics of pulse-modulated inductively coupled plasmas in argon and chlorine have been experimentally investigated. Measurements were performed for peak rf powers between 150 and 400 W at 13.56 MHz, duty cycles between 10 and 70%, and pulse repetition frequencies between 3 and 20 kHz. Over this parameter space, measurements were performed of the time dependent forward and reflected rf powers into the matching network, coil voltage, rf variation of the plasma potential, electron density, and Cl- density. These measurements indicated that for the first 5-30 rf cycles of each pulse, the discharges probably were operating in a capacitively coupled discharge mode with rf variations in the plasma potential of several hundreds of volts and relatively low electron density. Measurements of the electron density in pulse-modulated chlorine discharges indicated that the plateau electron density was a function of the duty cycle; the plateau electron density was lower for higher duty cycles. This may indicate that the ratio of Cl to Cl-2 was changing with duty cycle. In addition, a microwave radiometer was used to provide an indication of the time-dependent electron temperature. Large spikes in the microwave radiation temperature were noted at the turn-on of the rf power pulses and, in some cases, at the transition from a capacitively coupled to an inductively coupled plasma. (C) 1997 American Institute of Physics. C1 UNIV NEW MEXICO,DEPT ELECT & COMP ENGN,ALBUQUERQUE,NM 87131. RP Hebner, GA (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 22 TC 50 Z9 50 U1 4 U2 16 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 2814 EP 2821 DI 10.1063/1.366277 PG 8 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600013 ER PT J AU Fulton, RD Goldstein, JC Jones, ME KinrossWright, JM Kong, SH Nguyen, DC AF Fulton, RD Goldstein, JC Jones, ME KinrossWright, JM Kong, SH Nguyen, DC TI Enhanced energy loss of short pulses of electrons in plasma SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ACCELERATION; BEAM AB The enhancement of energy loss of short pulses of electrons in plasma has been experimentally observed. An enhancement of up to 3.5X10(4) over single-particle losses was observed when a 15 ps electron bunch was injected into a preformed target plasma with an electron density of approximately 10(13) cm(-3). This matches the theoretical prediction that the energy loss should he enhanced when the temporal duration of the electron bunch is approximately equal to pi/omega(pe), where omega(pe) is the plasma frequency of the target plasma. 2D numerical simulations are in good agreement with the observations. (C) 1997 American Institute of Physics. RP Fulton, RD (reprint author), LOS ALAMOS NATL LAB,MAIL STOP D410,LOS ALAMOS,NM 87545, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 2822 EP 2825 DI 10.1063/1.366112 PG 4 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600014 ER PT J AU Wright, AF AF Wright, AF TI Elastic properties of zinc-blende and wurtzite AlN, GaN, and InN SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID INFRARED LATTICE-VIBRATIONS; GALLIUM NITRIDE; ELECTRONIC-STRUCTURE; ALUMINUM NITRIDE; RAMAN-SCATTERING; HIGH-PRESSURE; SPECTROSCOPY; SEMICONDUCTORS; CONSTANTS; PHONONS AB Elastic constants for zinc-blende and wurtzite AlN, GaN, and InN are obtained from density-functional-theory calculations utilizing ab initio pseudopotentials and plane-wave expansions. Detailed comparisons are made with the available measured values and with results obtained in previous theoretical studies. These comparisons reveal clear discrepancies between the different sets of elastic constants which are further highlighted by examining derived quantities such as the perpendicular strain in a lattice-mismatched epitaxial film and the change in the wurtzite c/a ratio under hydrostatic pressure. Trends among results for the three compounds are also examined as well as differences between results for the zinc-blende and wurtzite phases. (C) 1997 American Institute of Physics. RP SANDIA NATL LABS, POB 5800, ALBUQUERQUE, NM 87185 USA. NR 36 TC 694 Z9 703 U1 19 U2 217 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 SEP 15 PY 1997 VL 82 IS 6 BP 2833 EP 2839 DI 10.1063/1.366114 PG 7 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600016 ER PT J AU Marudachalam, M Birkmire, RW Hichri, H Schultz, JM Swartzlander, A AlJassim, MM AF Marudachalam, M Birkmire, RW Hichri, H Schultz, JM Swartzlander, A AlJassim, MM TI Phases, morphology, and diffusion in CuInxGa1-xSe2 thin films SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CUINSE2 AB CuInxGa1-xSe2 thin films, with various Ga/(Ga+In) ratios, suitable for solar cells were processed by selenizing stacked Cu, Ga, and In precursor layers in a H2Se reactor in the temperature range of 400-500 degrees C. Cu/Ga/In and Cu/In/Ga precursors were obtained by sequential sputtering of the elemental layers. The Cu/Ga/In and Cu/In/Ga precursors, and the selenized films were characterized by scanning electron microscopy, x-ray diffraction, energy dispersive spectroscopy, and Auger electron spectroscopy. The precursors contained only binary and elemental phases in the as-deposited condition and after annealing. The selenized films had a nonuniform distribution of Ga and In. The surface of the selenized films were In rich, while the Mo/film interface in these films was Ga rich. The selenized films with Ga/(Ga+In) ratios greater than 0.25 contain graded Ga and In compositions, and the selenized films with Ga/(Ga+In) ratios less than 0.6 contain a phase-separated mixture of CuInSe2 and CuGaSe2 with the CuInSe2 near the surface and the CuGaSe2 near the Mo/film interface. Single phase, homogeneous CuInxGa1-xSe2 films were min. Interdiffusion of In and Ga between the CuGaSe2 and the CuInSe2 phases was found to be responsible for the homogenization process. This homogenization process does not occur in the presence of a selenium atmosphere. Diffusion measurements yielded similar interdiffusion coefficients for Ga and In. The annealing temperature and time to effect homogenization depends on the Ga/(Ga+In) ratio of the absorber films. Films with lower Ga/(Ga+In) ratios require a homogenization temperature of 600 degrees C or more and films with higher Ga/(Ga+In) ratios homogenize at a lower temperature of 400-500 degrees C, for an annealing time of 60 min. C1 UNIV DELAWARE,DEPT CHEM ENGN,NEWARK,DE 19716. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RP Marudachalam, M (reprint author), UNIV DELAWARE,US DOE,CTR EXCELLENCE PHOTOVOLT RES & EDUC,INST ENERGY CONVERS,NEWARK,DE 19716, USA. NR 15 TC 148 Z9 153 U1 0 U2 25 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 2896 EP 2905 DI 10.1063/1.366122 PG 10 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600025 ER PT J AU Munkholm, A Brennan, S Carr, EC AF Munkholm, A Brennan, S Carr, EC TI A comparison of surface roughness as measured by atomic force microscopy and x-ray scattering SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID INTERFACE; DIFFRACTION; SILICON; DEPENDENCE AB We compare measurements of the roughness of silicon(001) wafers cleaned by several methods. The roughness values were obtained using crystal truncation rod (CTR) scattering and atomic force microscopy. Although they do not yield identical results, both methods show the same relative roughness for the different cleans. CTR scattering is sensitive to roughness on lateral length scales down to atomic dimensions. The quantitative differences in roughness can be explained by the different wavelength spectrum of roughness probed by the two techniques. CTR measurements were also performed after a 60 Angstrom thermal oxide was grown on the wafers. The roughness trends are the same after oxidation, but we also find that the oxidation process has significantly reduced the interfacial roughness. (C) 1997 American Institute of Physics. C1 HEWLETT PACKARD CORP,PALO ALTO,CA 94304. RP Munkholm, A (reprint author), STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309, USA. NR 25 TC 22 Z9 22 U1 1 U2 8 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 2944 EP 2953 DI 10.1063/1.366129 PG 10 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600032 ER PT J AU Budhani, RC Willis, JO Suenaga, M Maley, MP Coulter, JY Safar, H Ullmann, JL Haldar, P AF Budhani, RC Willis, JO Suenaga, M Maley, MP Coulter, JY Safar, H Ullmann, JL Haldar, P TI Studies of flux pinning by proton-induced fission tracks in multifilamentary tapes of (Bi,Pb)(2)Sr2Ca2Cu3O10/Ag superconductors SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID 0.8 GEV PROTONS; RADIATION-DAMAGE; COLUMNAR DEFECTS; ION IRRADIATION; LINEAR DEFECTS; THIN-FILMS; TRANSPORT; ENHANCEMENT; YBA2CU3O7; CURRENTS AB The effects of proton-induced linear defects on the dissipationless flow of current in multifilamentary Ag-sheathed tapes of (Bi,Pb)(2)Sr2Ca2Cu3O10 superconductors in the temperature range of 55-77 K are reported. Randomly oriented columnar defects of estimated areal density 5 x10(10)/cm(2) produced by 800 MeV proton-induced fission fragments provide substantial enhancement of critical currents of these tapes. Furthermore, these defects are more isotropic flux pinning centers than high-energy heavy ion irradiation-induced columnar defects, However, there is a tradeoff between enhanced pinning and the deleterious' effects of radiation damage at higher proton fluences, It is shown that some of the global damage caused by the products of fission can be repaired by a suitable heat treatment of the samples. (C) 1997 American Institute of Physics. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. INTERMAGNET GEN CORP,LATHAM,NY 12110. INDIAN INST TECHNOL,KANPUR 208016,UTTAR PRADESH,INDIA. RP Budhani, RC (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 22 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 3014 EP 3018 DI 10.1063/1.366139 PG 5 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600043 ER PT J AU Choi, IH Eom, SH Yu, PY AF Choi, IH Eom, SH Yu, PY TI Dispersion of birefringence in AgGaS2 and CuGaS2 SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB The natural birefringence in two chalcopyrite semiconductors AgGaS2 and CuGaS2 have been measured in the visible at both room and liquid helium temperatures. This birefringence exhibits a sign reversal and considerable dispersion near the band gap in both samples. A phenomenological quasicubic model which was proposed to explain the dispersion of natural birefringence in wurtzite-type II-VI semiconductors is found to explain our experimental results quite satisfactorily provided exciton effect is included in fitting the data at low temperature. (C) 1997 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP Choi, IH (reprint author), CHUNG ANG UNIV,DEPT PHYS,SEOUL 156756,SOUTH KOREA. NR 10 TC 5 Z9 5 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 3100 EP 3104 DI 10.1063/1.366150 PG 5 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600058 ER PT J AU Ashby, CIH Sullivan, JP Choquette, KD Geib, KM Hou, HQ AF Ashby, CIH Sullivan, JP Choquette, KD Geib, KM Hou, HQ TI Wet oxidation of AlGaAs: The role of hydrogen SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID VERTICAL-CAVITY LASERS; THERMAL-OXIDATION AB Wet oxidation of AlGaAs to form Al2O3 by the reduction of H+ from water to H produces intermediate As2O3. Reduction of As2O3 by H to elemental As enables the escape of arsenic from the oxidized film. Further reduction of As to AsH3 can provide another volatile As species. Formation of intermediate As is problematic for the use of wet oxidation in metal-insulator-semiconductor applications. The kinetic balance between As2O3 formation and As escape can explain the transition between the linear and parabolic time dependence of the wet oxidation of buried AlGaAs layers. The near-total suppression of wet oxidation by O-2 is attributed to the suppression of volatile product formation through consumption of atomic hydrogen by reaction with O-2 to form H2O in preference to the hydrogen reduction of As2O3. (C) 1997 American Institute of Physics. RP Ashby, CIH (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 11 TC 44 Z9 45 U1 0 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 3134 EP 3136 DI 10.1063/1.366156 PG 3 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600065 ER PT J AU Kamitani, K Grimsditch, M Nipko, JC Loong, CK Okada, M Kimura, I AF Kamitani, K Grimsditch, M Nipko, JC Loong, CK Okada, M Kimura, I TI The elastic constants of silicon carbide: A Brillouin-scattering study of 4H and 6H SiC single crystals SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID AB-INITIO CALCULATION; LATTICE AB The complete sets of elastic constants of 4H and 6H silicon carbide single crystals were determined by Brillouin scattering. The elastic constants of 6H SiC are C-11=501+/-4, C-33-553+/-4, C-44=163+/-4, C-12=111+/-5, and C-13=52+/-9 GPa; the corresponding ones of 4H SiC are the same within experimental uncertainties. The compressibility, 4.5x10(-3) GPa, is about 3-5 times smaller than those reported for polycrystalline SiC materials. (C) 1997 American Institute of Physics. C1 ARGONNE NATL LAB,DIV INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439. KYOTO UNIV,INST RES REACTOR,KUMATORI,OSAKA 59004,JAPAN. KYOTO UNIV,DEPT NUCL ENGN,KYOTO 60601,JAPAN. RP Kamitani, K (reprint author), ARGONNE NATL LAB,DIV SCI MAT,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 20 TC 98 Z9 100 U1 1 U2 24 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 15 PY 1997 VL 82 IS 6 BP 3152 EP 3154 DI 10.1063/1.366100 PG 3 WC Physics, Applied SC Physics GA XX996 UT WOS:A1997XX99600069 ER PT J AU Lowry, KJ Hamson, KR Bear, L Peng, YB Calaluce, R Evans, ML Anglen, JO Allen, WC AF Lowry, KJ Hamson, KR Bear, L Peng, YB Calaluce, R Evans, ML Anglen, JO Allen, WC TI Polycaprolactone/glass bioabsorbable implant in a rabbit humerus fracture model SO JOURNAL OF BIOMEDICAL MATERIALS RESEARCH LA English DT Article; Proceedings Paper CT Southern-Orthopaedic-Association Meeting CY NOV 18, 1995 CL KANSAS CITY, MO SP So Orthopaed Assoc DE polycaprolactone; bioabsorbable; internal fixation; fracture fixation; polymer ID FIXATION; OSTEOTOMIES; RODS; PLA; PGA AB Research in improved materials and methods for internal fixation has centered on internal fixators made of bioabsorbable materials such as polylactic acid, polyglycolic acid, and polyparadioxanone. These materials have two problems: the first is a postoperative complication related to a delayed inflammatory response; and the second is low strength characteristics. An alternative material developed to alleviate these problems is a composite of phosphate glass fibers embedded in the polymer polycaprolactone, referred to as PCL. Ln this study, intramedullary pins made of PCT, were compared to stainless steel pins in a rabbit humerus osteotomy model. Specimens were harvested at 0, 6, and 12 weeks postoperatively, radiographs and mechanical testing to failure were performed at each time interval, and tissue was examined microscopically at 6 and 12 weeks. Histologic results showed PCL pins to be well tolerated with minimal inflammation around the pin. Mechanical testing revealed the PCL fixation to be weaker initially than the stainless steel fixation. There was significant stress shielding of stainless-steel-healed rabbit humeri when compared to the PCL/bone humeri. All osteotomies immobilized with PCL healed with abundant periosteal callus production. (C) 1997 John Wiley & Sons, Inc. C1 PACIFIC NW NATL LAB,RICHLAND,WA 99352. UNIV MISSOURI,DEPT PATHOL,COLUMBIA,MO 65212. RP Lowry, KJ (reprint author), UNIV MISSOURI,DEPT ORTHOPAED SURG,1 HOSP DR,M562,COLUMBIA,MO 65212, USA. NR 21 TC 89 Z9 96 U1 0 U2 9 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-9304 J9 J BIOMED MATER RES JI J. Biomed. Mater. Res. PD SEP 15 PY 1997 VL 36 IS 4 BP 536 EP 541 PG 6 WC Engineering, Biomedical; Materials Science, Biomaterials SC Engineering; Materials Science GA XU176 UT WOS:A1997XU17600012 PM 9294770 ER PT J AU Ivanic, J Atchity, GJ Ruedenberg, K AF Ivanic, J Atchity, GJ Ruedenberg, K TI Violation of the weak noncrossing rule between totally symmetric closed-shell states in the valence-isoelectronic series O-3, S-3, SO2, and S2O SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY SURFACES; MOLECULAR ELECTRONIC WAVEFUNCTIONS; SPACE SCF METHOD; GROUND-STATE; OZONE; INTERSECTION; CROSSINGS; SPECTRUM; ISOMERS; PHASE AB The ground and next excited (1)A(1) potential energy surfaces of the valence-isoelectronic molecules O-3, S-3, SO2, and S2O have been studied using full-valence-space-multiconfiguration self-consistent-field calculations. An open and a ring minimum were found for all species. In each case, interconversion between the C-2v open and closed isomers proceeds via a C-2v transition state which lies on a very sharp ridge separating the basins surrounding the minima. In the immediate vicinity of these transition states, the upper state for each species is found to have a minimum, also in C-2v. Furthermore, not far away on the C-2v ridges, the 1 (1)A(1) and 2 (1)A(1) surfaces intersect conically for all molecules. (C) 1997 American Institute of Physics. C1 IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. RP Ivanic, J (reprint author), IOWA STATE UNIV,US DOE,AMES LAB,AMES,IA 50011, USA. NR 46 TC 51 Z9 51 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 15 PY 1997 VL 107 IS 11 BP 4307 EP 4317 DI 10.1063/1.474771 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XW119 UT WOS:A1997XW11900021 ER PT J AU Browne, PV Shalev, O Kuypers, FA Brugnara, C Solovey, A Mohandas, N Schrier, SL Hebbel, RP AF Browne, PV Shalev, O Kuypers, FA Brugnara, C Solovey, A Mohandas, N Schrier, SL Hebbel, RP TI Removal of erythrocyte membrane iron in vivo ameliorates the pathobiology of murine thalassemia SO JOURNAL OF CLINICAL INVESTIGATION LA English DT Article DE thalassemia; red blood cell; membrane; iron; chelation ID BLOOD-CELL MEMBRANE; ALPHA-HEMOGLOBIN CHAINS; MOUSE BETA-THALASSEMIA; SICKLE ERYTHROCYTE; PROTEIN DEFECTS; DEFERIPRONE; OXIDATION; MODEL; PATHOPHYSIOLOGY; ASSOCIATION AB Abnormal deposits of free iron are found on the cytoplasmic surface of red blood cell (RBC) membranes in beta-thalassemia. To test the hypothesis that this is of importance to RBC pathobiology, we administered the iron chelator deferiprone (L1) intraperitoneally to beta-thalassemic mice for 4 wk and then studied RBC survival and membrane characteristics. LI therapy decreased membrane free iron by 50% (P = 0.04) and concomitantly improved oxidation of membrane proteins (P = 0.007), the proportion of RBC gilded with immunoglobulin (P = 0.001), RBC potassium content (P < 0.001), and mean corpuscular volume (P < 0.001). Osmotic gradient ektacytometry confirmed a trend toward improvement of RBC hydration status. As determined by clearance of RBC biotinylated in vivo, RBC survival also was significantly improved in L1-treated mice compared with controls (P = 0.007). Thus, in vivo therapy with L1 removes pathologic free iron deposits from RBC membranes in murine thalassemia, and causes improvement in membrane function and RBC survival. This result provides in vivo confirmation that abnormal membrane free iron deposits contribute to the pathobiology of thalassemic RBC. C1 UNIV MINNESOTA,SCH MED,DEPT MED,MINNEAPOLIS,MN 55455. CHILDRENS HOSP,OAKLAND,CA 94609. CHILDRENS HOSP,DEPT PATHOL,BOSTON,MA 02115. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. STANFORD UNIV,SCH MED,DEPT MED,STANFORD,CA 94305. RI ODOnnell, Jim/C-2454-2009; Brugnara, Carlo/A-8041-2010; OI Brugnara, Carlo/0000-0001-8192-8713; Browne, Paul/0000-0001-5310-1487 FU NHLBI NIH HHS [HL27059, HL15157]; NIDDK NIH HHS [DK32094] NR 29 TC 27 Z9 30 U1 0 U2 2 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0021-9738 J9 J CLIN INVEST JI J. Clin. Invest. PD SEP 15 PY 1997 VL 100 IS 6 BP 1459 EP 1464 DI 10.1172/JCI119666 PG 6 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA XY730 UT WOS:A1997XY73000016 PM 9294111 ER PT J AU Hughes, SD Lou, XJ Ighani, S Verstuyft, J Grainger, DJ Lawn, RM Rubin, EM AF Hughes, SD Lou, XJ Ighani, S Verstuyft, J Grainger, DJ Lawn, RM Rubin, EM TI Lipoprotein(a) vascular accumulation in mice - In vivo analysis of the role of lysine binding sites using recombinant adenovirus SO JOURNAL OF CLINICAL INVESTIGATION LA English DT Article DE lipoprotein(a), analysis; atherosclerosis, physiopathology; gene transfer; transgenic mice ID TRANSGENIC APOLIPOPROTEIN(A) MICE; PLASMINOGEN; QUANTIFICATION; ATHEROGENESIS; FIBRINOGEN; SEQUENCE; APO; APO(A) AB Although the mechanism by which lipoprotein(a) [Lp(a)] contributes to vascular disease remains unclear, consequences of its binding to the vessel surface are commonly cited in postulated atherogenic pathways. Because of the presence of plasminogen-like lysine binding sites (LBS) in apo(a), fibrin binding has been proposed to play an important role in Lp(a)'s vascular accumulation. Indeed, LBS are known to facilitate Lp(a) fibrin binding in vitro. To examine the importance of apo(a) LBS in Lp(a) vascular accumulation in vivo, we generated three different apo(a) cDNAs: (a) mini apo(a), based on wild-type human apo(a); (b) mini apo(a) containing a naturally occurring LBS defect associated with a point mutation in kringle 4-10; and (c) human-rhesus monkey chimeric mini apo(a), which contains the same LBS defect in the context of several additional changes. Recombinant adenovirus vectors were constructed with the various apo(a) cDNAs and injected into human apoB transgenic mice. At the viral dosage used in these experiments, all three forms of apo(a) were found exclusively within the lipoprotein fractions, and peak Lp(a) plasma levels were nearly identical (similar to 45 mg/dl). In vitro analysis of Lp(a) isolated from the various groups of mice confirmed that putative LBS defective apo(a) yielded Lp(a) unable to bind lysine-Sepharose. Quantitation of in vivo Lp(a) vascular accumulation in mice treated with the various adenovirus vectors revealed significantly less accumulation of both types of LBS defective Lp(a), relative to wild-type Lp(a). These results indicate a correlation between lysine binding properties of Lp(a) and vascular accumulation, supporting the postulated role of apo(a) LBS in this potentially atherogenic characteristic of Lp(a). C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR HUMAN GENOME,DIV LIFE SCI,BERKELEY,CA 94720. STANFORD UNIV,SCH MED,DIV CARDIOVASC MED,STANFORD,CA 94305. UNIV CAMBRIDGE,DEPT MED,CAMBRIDGE CB2 2QQ,ENGLAND. FU NHLBI NIH HHS [HL50590, PPG HL18574] NR 36 TC 44 Z9 44 U1 0 U2 1 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0021-9738 J9 J CLIN INVEST JI J. Clin. Invest. PD SEP 15 PY 1997 VL 100 IS 6 BP 1493 EP 1500 DI 10.1172/JCI119671 PG 8 WC Medicine, Research & Experimental SC Research & Experimental Medicine GA XY730 UT WOS:A1997XY73000021 PM 9294116 ER PT J AU Mousseau, VA Knoll, DA AF Mousseau, VA Knoll, DA TI Fully implicit kinetic solution of collisional plasmas SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID FOKKER-PLANCK EQUATION; FLUID EQUATIONS; TRANSPORT; ALGORITHM; PARTICLE; SYSTEMS; TEMPERATURE; SIMULATION; SOLVER; HYBRID AB In this paper we describe a numerical technique, matrix-free Newton-Krylov, for solving a single species, stationary, one spatial dimension, one velocity dimension, Vlasov-Fokker-Planck equation. This method is both deterministic and fully implicit and may not have been a viable option before recent developments in numerical methods. It is demonstrated that efficient steady-state solutions to the nonlinear integro-differential equation, can be achieved, obtaining quadratic convergence, but not incurring the large memory requirements of an integral operator. We present a model problem which simulates ion transport in the edge plasma of a tokamak fusion reactor and use this model problem to demonstrate the performance of the new solution method. We demonstrate that the solution algorithm is compatible with a higher-order, monotone, convective differencing scheme. (C) 1997 Academic Press. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP Mousseau, VA (reprint author), US NUCL REGULATORY COMMISS,OFF NUCL REGULATORY RES,MS TWFN-10E46,WASHINGTON,DC 20555, USA. NR 35 TC 10 Z9 10 U1 0 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD SEP 15 PY 1997 VL 136 IS 2 BP 308 EP 323 DI 10.1006/jcph.1997.5736 PG 16 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA XZ450 UT WOS:A1997XZ45000007 ER PT J AU Ouyang, H Nussenzweig, A Kurimasa, A Soares, VD Li, XL CordonCardo, C Li, WH Cheong, N Nussenzweig, M Iliakis, G Chen, DJ Li, GC AF Ouyang, H Nussenzweig, A Kurimasa, A Soares, VD Li, XL CordonCardo, C Li, WH Cheong, N Nussenzweig, M Iliakis, G Chen, DJ Li, GC TI Ku70 is required for DNA repair but not for T cell antigen receptor gene recombination in vivo SO JOURNAL OF EXPERIMENTAL MEDICINE LA English DT Article ID STRAND-BREAK-REPAIR; DEPENDENT PROTEIN-KINASE; V(D)J RECOMBINATION; SCID MUTATION; IONIZING-RADIATION; HEAT-SHOCK; MICE; MUTANTS; BINDING; MOUSE AB Ku is a complex of two proteins, Ku70 and Ku80, and functions as a heterodimer to bind DNA double-strand breaks (DSB) and activate DNA-dependent protein kinase. The role of the Ku70 subunit in DNA DSB repair, hypersensitivity to ionizing radiation, and V(D)J recombination was examined in mice that lack Ku70 (Ku70(-/-)). Like Ku80(-/-) mice, Ku70(-/-) mice showed a profound deficiency in DNA DSB repair and were proportional dwarfs. Surprisingly, in contrast to Ku80(-/-) mice in which both T and B lymphocyte development were arrested at an early stage, lack of Ku70 was compatible with T cell receptor gene recombination and the development of mature CD4(+)CD8(-) and CD4(-)CD8(+) T cells. Our data shows, for the first time, that Ku70 plays an essential role in DNA DSB repair, but is not required for TCR V(D)J recombination. These results suggest that distinct but overlapping repair pathways may mediate DNA DSB repair and V(D)J recombination. C1 MEM SLOAN KETTERING CANC CTR,DEPT RADIAT ONCOL,NEW YORK,NY 10021. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. THOMAS JEFFERSON UNIV,PHILADELPHIA,PA 19107. ROCKEFELLER UNIV,NEW YORK,NY 10021. RP Ouyang, H (reprint author), MEM SLOAN KETTERING CANC CTR,DEPT MED PHYS,1275 YORK AVE,BOX 72,NEW YORK,NY 10021, USA. FU NCI NIH HHS [T32 CA061801, R01 CA050519, R01 CA056909, R37 CA050519, CA-56909, CA-42026, CA-31397] NR 36 TC 208 Z9 211 U1 0 U2 1 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0022-1007 J9 J EXP MED JI J. Exp. Med. PD SEP 15 PY 1997 VL 186 IS 6 BP 921 EP 929 DI 10.1084/jem.186.6.921 PG 9 WC Immunology; Medicine, Research & Experimental SC Immunology; Research & Experimental Medicine GA XX678 UT WOS:A1997XX67800013 PM 9294146 ER PT J AU Foster, I Kohr, DR Krishnaiyer, R Choudhary, A AF Foster, I Kohr, DR Krishnaiyer, R Choudhary, A TI A library-based approach to task parallelism in a data-parallel language SO JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING LA English DT Article ID FORTRAN AB Pure data-parallel languages such as High Performance Fortran version 1 (HPF) do not allow efficient expression of mixed task/data-parallel computations or the coupling of separately compiled data-parallel modules, In this paper, we show how these common parallel program structures can be represented, with only minor extensions to the HPF model, by using a coordination library based on the Message Passing Interface (MPI). This library allows data-parallel tasks to Exchange distributed data structures using falls to simple communication functions. We present microbenchmark results that characterize the performance of this library and that quantify the impact of optimizations that allow reuse of communication schedules in common situations, In addition, results from two-dimensional FFT, convolution, and multiblock programs demonstrate that the HPF/MPI library can provide performance superior to that of pore HPF, We conclude that this synergistic combination of two parallel programming standards represents a useful approach to task parallelism in a data-parallel framework, increasing the range of problems addressable in HPF without requiring complex compiler technology. (C) 1997 Academic Press. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. Syracuse Univ, Dept Comp & Informat Sci, Syracuse, NY 13244 USA. Northwestern Univ, Inst Technol, Dept Elect & Comp Engn, Evanston, IL 60208 USA. RP Foster, I (reprint author), Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Choudhary, Alok/C-5486-2009 NR 28 TC 17 Z9 17 U1 0 U2 1 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0743-7315 J9 J PARALLEL DISTR COM JI J. Parallel Distrib. Comput. PD SEP 15 PY 1997 VL 45 IS 2 BP 148 EP 158 DI 10.1006/jpdc.1997.1367 PG 11 WC Computer Science, Theory & Methods SC Computer Science GA YM831 UT WOS:000071105800005 ER PT J AU Taylor, VE Stevens, RL Arnold, KE AF Taylor, VE Stevens, RL Arnold, KE TI Parallel molecular dynamics: Implications for massively parallel machines SO JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING LA English DT Article ID SIMULATIONS; ALGORITHM AB Molecular dynamics simulation is a class of applications that require reducing the execution time of fixed-size problems. This reduction in execution time is important to drug design and protein interact ion studies, Many implementations of parallel molecular dynamics have been developed, but very little work has addressed issues related to the use of machines with 50,000 processors fear modest-sized problems in the range of 50,000 atoms. Current massively parallel machines present a major obstacle to achieving good performance: communication overhead, In this paper we quantify the communication latency and network bandwidth necessary to achieve 30-40% efficiency on future message-passing machines with sizes an the order of fens of thousands of processors, for executing molecular dynamics problems with the same order of atoms, We derive an analytical model of a benchmark application that simulates a system of helium atoms executing on the Intel Touchstone Delta using an interaction decomposition method. This model is validated and used to extrapolate information on the startup time and network bandwidth. The results indicate that for an MPP with a four-dimensional mesh topology using 400 MHz processors, the communication startup time muse he at most 30 clock cycles and the network bandwidth at least 2.3 GB/s, This configuration results in 30-40% efficiency of the MPP for a problem with 50,000 atoms executing on 50,000 processors. (C) 1997 Academic Press. C1 Northwestern Univ, Dept Elect Engn & Comp Sci, Evanston, IL 60208 USA. Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Taylor, VE (reprint author), Northwestern Univ, Dept Elect Engn & Comp Sci, Evanston, IL 60208 USA. NR 16 TC 14 Z9 15 U1 0 U2 0 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0743-7315 J9 J PARALLEL DISTR COM JI J. Parallel Distrib. Comput. PD SEP 15 PY 1997 VL 45 IS 2 BP 166 EP 175 DI 10.1006/jpdc.1997.1370 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA YM831 UT WOS:000071105800007 ER PT J AU Tanner, PA Liu, YL Edelstein, NM Murdoch, KM Khaidukov, NM AF Tanner, PA Liu, YL Edelstein, NM Murdoch, KM Khaidukov, NM TI Vibrational and electronic spectra of EuF6(3-) SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID STRUCTURAL PHASE-TRANSITIONS; ENERGY-TRANSFER; CRYSTAL-FIELD; RB2KMIIIF6 ELPASOLITES; LATTICE-DYNAMICS; LANTHANIDE IONS; CS2NAEUCL6; STATE; RAMAN; ABSORPTION AB Single crystals of Cs2NaYF6 doped with molar concentrations of Eu3+ between 0.1 and 20% have been synthesized by the hydrothermal method, and studied by absorption, excitation and luminescence spectroscopy at temperatures down to 4 K. The observed spectral features were consistently assigned with reference to those of the corresponding europium hexachloroelpasolite. No distortion from octahedral symmetry was evident for the Eu3+ site in the 0.1 mol%-doped Cs2NaYF6 crystal, but small splittings of magnetic dipole zero-phonon lines in the spectra of the 20%-doped crystals are observed below 20 K. The vibrational behaviour of EuF63- has been interpreted, and the energy-level scheme of the Eu3+ ion was deduced from the observed and inferred zero-phonon-line positions in the optical spectra. A parametrized Hamiltonian was fitted to 21 crystal-field levels of Eu3+ in Cs2NaYF6. The fourth-and sixth-degree crystal-field parameters were about 1.6 times larger than for Cs2NaEuCl6. The temperature shifts of the crystal-field levels were found to be negative, in contrast to the mostly positive shifts previously reported for actinide systems in octahedral symmetry, and were largely determined by the changes in the Slater parameters rather than the crystal-field parameters. A preliminary study has been made of the decay kinetics of the D-5(J) (J = 0, 1,2) levels. D-5(2) is quenched by a cross-relaxation mechanism, and SDI also by a thermally activated mechanism. The lifetime of D-5(0) does not exhibit a noticeable temperature or concentration dependence. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RUSSIAN ACAD SCI,INST GEN & INORGAN CHEM,MOSCOW 117907,RUSSIA. RP Tanner, PA (reprint author), CITY UNIV HONG KONG,DEPT BIOL & CHEM,TAT CHEE AVE,KOWLOON,HONG KONG. RI Khaidukov, Nicholas/D-2761-2014 NR 47 TC 38 Z9 38 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD SEP 15 PY 1997 VL 9 IS 37 BP 7817 EP 7836 DI 10.1088/0953-8984/9/37/013 PG 20 WC Physics, Condensed Matter SC Physics GA XW789 UT WOS:A1997XW78900013 ER PT J AU Ishikiriyama, K Wunderlich, B AF Ishikiriyama, K Wunderlich, B TI Crystallization and melting of poly(oxyethylene) analyzed by temperature-modulated calorimetry SO JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS LA English DT Article DE temperature-modulated calorimetry; TMC; temperature-modulated differential scanning calorimetry; TMDSC; melting; crystallization; molecular nucleation; poly(oxyethylene) ID DIFFERENTIAL SCANNING CALORIMETRY; LINEAR ALIPHATIC POLYOXIDES; HEAT-CAPACITY; POLY(ETHYLENE OXIDE); THERMODYNAMIC PROPERTIES; MOLECULAR SEGREGATION; NUCLEATION; MACROMOLECULES; POLYETHYLENE AB Temperature-modulated calorimetry, TMC, is used to evaluate the temperature region of metastability between crystallization and melting. While crystals like indium can be made to melt practically reversibly during a TMC cycle of low amplitude so that sufficient crystal nuclei remain unmelted, linear macromolecules cannot, because of their need to undergo molecular nucleation. Modulation amplitudes varying from +/-0.2 to +/-3.0 K are used to assess the temperature gap between the slow crystallization region and the melting of metastable crystals of poly(oxyethylene) (PEG) of molar mass 1500 Da. This low molar mass PEO serves as a model compound with a metastable gap of melting/crystallization that can be bridged by TMC with a large modulation amplitude. (C) 1997 John Wiley & Sons, Inc. C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 37 TC 69 Z9 69 U1 2 U2 12 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-6266 J9 J POLYM SCI POL PHYS JI J. Polym. Sci. Pt. B-Polym. Phys. PD SEP 15 PY 1997 VL 35 IS 12 BP 1877 EP 1886 DI 10.1002/(SICI)1099-0488(19970915)35:12<1877::AID-POLB3>3.0.CO;2-N PG 10 WC Polymer Science SC Polymer Science GA XN890 UT WOS:A1997XN89000003 ER PT J AU Baker, OK AF Baker, OK TI The space-like kaon electromagnetic form factor SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 1st Workshop on Hadron Dynamics with the New DAPHINE and CEBAF Facilities CY NOV 11-14, 1996 CL FRASCATI, ITALY SP INFN, DOE ID PSEUDOSCALAR MESONS; ELECTROPRODUCTION; STRANGENESS; NUCLEON; PIONS; MODEL AB The electroproduction of kaons can potentially provide information about their spacelike electromagnetic form factor at large momentum transfers. The aim of the recently completed Experiment E93-018 at the Thomas Jefferson National Accelerator Facility was to measure the elementary amplitudes in the associated production mechanism. Then, in principle, it should be possible to extract the kaon form factor at Q(2) = 1.0 GeV2/c(2). This momentum transfer is more than an order of magnitude higher than previously acheived in kaon form factor measurements. C1 THOMAS JEFFERSON NATL ACCELERATOR FACIL,DIV PHYS,NEWPORT NEWS,VA. RP Baker, OK (reprint author), HAMPTON UNIV,DEPT PHYS,HAMPTON,VA 23668, USA. NR 39 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 J9 NUCL PHYS A JI Nucl. Phys. A PD SEP 15 PY 1997 VL 623 IS 1-2 BP C351 EP C356 PG 6 WC Physics, Nuclear SC Physics GA YC277 UT WOS:A1997YC27700037 ER PT J AU Burkert, VD AF Burkert, VD TI The CEBAF N* program SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 1st Workshop on Hadron Dynamics with the New DAPHINE and CEBAF Facilities CY NOV 11-14, 1996 CL FRASCATI, ITALY SP INFN, DOE ID RELATIVIZED QUARK-MODEL; BARYONS; ELECTROPRODUCTION; TRANSITION; RESONANCES; DELTA AB Physics topics relevant to the excitation of nucleon resonances are discussed. It is argued that measurements of electromagnetic resonance transition amplitudes are sensitive to the QCD structure of the nucleon. The status and experimental schedule of the N* program at CEBAF are outlined. RP Burkert, VD (reprint author), JEFFERSON LAB,CEBAF,12000 JEFFERSON AVE,NEWPORT NEWS,VA 23606, USA. NR 34 TC 18 Z9 19 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 SEP 15 PY 1997 VL 623 IS 1-2 BP C59 EP C70 PG 12 WC Physics, Nuclear SC Physics GA YC277 UT WOS:A1997YC27700006 ER PT J AU Grunder, HA AF Grunder, HA TI Status of Thomas Jefferson National Accelerator Facility (Jefferson Lab) SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 1st Workshop on Hadron Dynamics with the New DAPHINE and CEBAF Facilities CY NOV 11-14, 1996 CL FRASCATI, ITALY SP INFN, DOE AB When first beam was delivered on target in July 1994, the Continuous Electron Beam Accelerator Facility (CEBAF), in Newport News, Virginia realized the return on years of planning and work to create a laboratory devoted to exploration of matter that interacts through the strong force, which holds the quarks inside the proton and binds protons and neutrons into the nucleus. Dedicated this year as the Thomas Jefferson National Accelerator Facility (Jefferson Lab), the completion of construction and beginning of its experimental program has culminated a process that began more than a decade ago with the convening of the Bromley Panel to look at research possibilities for such an electron accelerator. RP Grunder, HA (reprint author), JEFFERSON LAB,12000 JEFFERSON AVE,NEWPORT NEWS,VA 23606, USA. NR 0 TC 6 Z9 6 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 SEP 15 PY 1997 VL 623 IS 1-2 BP C10 EP C15 PG 6 WC Physics, Nuclear SC Physics GA YC277 UT WOS:A1997YC27700003 ER PT J AU Isgur, N AF Isgur, N TI To reveal the quark structure of matter SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT 1st Workshop on Hadron Dynamics with the New DAPHINE and CEBAF Facilities CY NOV 11-14, 1996 CL FRASCATI, ITALY SP INFN, DOE ID ZWEIG-IIZUKA RULE; OZI RULE; MODEL; BARYONS AB I present a overview of some central issues facing strong interaction physics today, with an emphasis on questions that will be addressed in concert by CEBAF at Jefferson Lab and by the new DAPHNE machine at Frascati Lab. RP Isgur, N (reprint author), JEFFERSON LAB,12000 JEFFERSON AVE,NEWPORT NEWS,VA 23606, USA. NR 21 TC 14 Z9 14 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 SEP 15 PY 1997 VL 623 IS 1-2 BP C37 EP C55 PG 19 WC Physics, Nuclear SC Physics GA YC277 UT WOS:A1997YC27700005 ER PT J AU Fischler, W Halyo, E Rajaraman, A Susskind, L AF Fischler, W Halyo, E Rajaraman, A Susskind, L TI The incredible shrinking torus SO NUCLEAR PHYSICS B LA English DT Article AB Using M(atrix) theory, the dualities of toroidally compactified M-theory can be formulated as properties of super Yang Mills theories in various dimensions. We consider the cases of compactification on 1-, 2-, 3-, 4- and 5-dimensional tori. The dualities required by string theory lead to conjectures of remarkable symmetries and relations between field theories as well as extremely unusual dynamical properties. By studying the theories in the limit of vanishingly small tori, a wealth of information is obtained about strongly coupled fixed points of super Yang-Mills theory in various dimensions. Perhaps the most striking behavior, as noted by Rozali in this context, is the emergence of an additional dimension of space in the case of a 4-torus. (C) 1997 Elsevier Science B.V. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. STANFORD UNIV,DEPT PHYS,STANFORD,CA 94305. RP Fischler, W (reprint author), UNIV TEXAS,DEPT PHYS,THEORY GRP,AUSTIN,TX 78712, USA. OI Fischler, Willy/0000-0002-9075-015X NR 16 TC 29 Z9 29 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 15 PY 1997 VL 501 IS 2 BP 409 EP 426 DI 10.1016/S0550-3213(97)00400-8 PG 18 WC Physics, Particles & Fields SC Physics GA YA047 UT WOS:A1997YA04700005 ER PT J AU Maniloff, ES Vacar, D McBranch, DW Wang, HL Mattes, BR Gao, J Heeger, AJ AF Maniloff, ES Vacar, D McBranch, DW Wang, HL Mattes, BR Gao, J Heeger, AJ TI Ultrafast holography using charge-transfer polymers SO OPTICS COMMUNICATIONS LA English DT Article ID PHOTOINDUCED ELECTRON-TRANSFER; DYNAMIC HOLOGRAPHY; STORAGE; DYE; LIGHT; FILM AB Charge-transfer polymers are a new class of nonlinear optical materials which can be used for generating femtosecond holographic gratings. Using semiconducting polymers sensitized with varying concentrations of C-60, holographic gratings were recorded by individual ultrafast laser pulses; the diffraction efficiency and time decay of the gratings were measured using non-degenerate four-wave mixing. Using a figure of merit for dynamic data processing, the temporal diffraction efficiency, this new class of materials exhibits between two and 12 orders of magnitude higher response than any other class of material. The high quantum efficiency and metastability of the charge transfer enables tuning of the decay dynamics by controlling the concentration of accepters in the blend. (C) 1997 Elsevier Science B.V. C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. UNIV CALIF SANTA BARBARA,INST POLYMERS & ORGAN SOLIDS,SANTA BARBARA,CA 93106. NR 20 TC 29 Z9 30 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD SEP 15 PY 1997 VL 141 IS 5-6 BP 243 EP 246 DI 10.1016/S0030-4018(97)00241-1 PG 4 WC Optics SC Optics GA XU722 UT WOS:A1997XU72200002 ER PT J AU McCluskey, MD Haller, EE Walker, J Johnson, NM Vetterhoffer, J Weber, J Joyce, TB Newman, RC AF McCluskey, MD Haller, EE Walker, J Johnson, NM Vetterhoffer, J Weber, J Joyce, TB Newman, RC TI Local vibrational modes in GaAs under hydrostatic pressure SO PHYSICAL REVIEW B LA English DT Article ID DIAMOND ANVIL CELL; HYDROGEN COMPLEXES; ACCEPTOR-HYDROGEN; SPECTROSCOPY; ABSORPTION AB Using infrared spectroscopy, we have observed local vibrational modes (LVM's) in GaAs at hydrostatic pressures as high as 7 GPa at liquid-helium temperatures. The shift of the infrared-active upsilon(3) vibrational mode of CO2 impurities in the N-2 pressure medium was used as an in situ pressure calibration. We find that LVM's arising from C-12(As) and C-13(As) substitutional impurities vary linearly with pressure. The shifts of the C-12(As)-H and C-13(As)-H stretch modes have positive curvatures, while the pressure-dependent shift of the S-H stretch mode has a negative curvature. C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. XEROX CORP,PALO ALTO RES CTR,PALO ALTO,CA 94304. MAX PLANCK INST FESTKORPERFORSCH,D-70506 STUTTGART,GERMANY. UNIV LIVERPOOL,DEPT MAT SCI & ENGN,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,BLACKETT LAB,INTERDISCIPLINARY RES CTR SEMICOND MAT,LONDON SW7 2BZ,ENGLAND. RP McCluskey, MD (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Schaff, William/B-5839-2009 NR 19 TC 17 Z9 18 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6404 EP 6407 DI 10.1103/PhysRevB.56.6404 PG 4 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600009 ER PT J AU Johnson, DE Phillips, JM Larese, JZ AF Johnson, DE Phillips, JM Larese, JZ TI Search for evidence of commensurate argon-on-graphite films near monolayer completion SO PHYSICAL REVIEW B LA English DT Article AB The structural properties of argon films adsorbed on graphite at 85 K were investigated as a function of coverage using neutron diffraction. This study was prompted by the recent high-resolution heat-capacity measurements of Day et al. which uncovered a series of anomalies near monolayer melting. These features were attributed to the formation of a registered, root 3 x root 3 R30 degrees phase. The diffraction study presented here shows that this commensurate phase does not exist in the portion of the phase diagram suggested by the thermodynamic study. On the contrary, a compressed solid phase with a lattice constant close to that of the close-packed plane of the bulk solid forms. Evidence of second-layer population in the diffraction study suggests that these heat-capacity anomalies might be direct evidence of layer promotion. C1 UNIV MISSOURI,DEPT PHYS,KANSAS CITY,MO 64110. RP Johnson, DE (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. NR 8 TC 10 Z9 10 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6462 EP 6465 DI 10.1103/PhysRevB.56.6462 PG 4 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600024 ER PT J AU Gu, T Goldman, AI Mao, M AF Gu, T Goldman, AI Mao, M TI Characterization of interfacial roughness in Co/Cu multilayers by x-ray scattering SO PHYSICAL REVIEW B LA English DT Article ID GIANT MAGNETORESISTANCE; SUPERLATTICES; REFLECTION; GROWTH AB The interfacial roughness of a magnetron-sputtered Si(001)/[Co 12 Angstrom/Cu 9.7 Angstrom](30)/(Cu 30 Angstrom) multilayer was investigated by x-ray scattering, and partial conformal roughness was observed. Specular. longitudinal, and transverse diffuse intensities were acquired by a high-resolution triple-crystal x-ray diffractometer and evaluated simultaneously based on the distorted-wave Born approximation. An approach to the analysis of the diffuse signal is proposed. C1 IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011. MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON,ON L8S 4M1,CANADA. RP Gu, T (reprint author), US DOE,AMES LAB,AMES,IA 50011, USA. NR 25 TC 17 Z9 17 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6474 EP 6477 DI 10.1103/PhysRevB.56.6474 PG 4 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600027 ER PT J AU Yu, ZG Smith, DL Saxena, A Bishop, AR AF Yu, ZG Smith, DL Saxena, A Bishop, AR TI Effects of lattice fluctuations on electronic transmission in metal/conjugated-oligomer/metal structures SO PHYSICAL REVIEW B LA English DT Article ID SELF-ASSEMBLED MONOLAYERS; CONDUCTION; MOTION; WIRES AB The electronic transmission across metal/conjugated-oligomer/metal structures in the presence of lattice fluctuations is studied for short oligomer chains. The lattice fluctuations are approximated by static white noise disorder. Resonant transmission occurs when the energy of an incoming electron coincides with a discrete electronic level of the oligomer. The corresponding transmission peak diminishes in intensity with increasing disorder strength. Because of disorder there is an enhancement of the electronic transmission for energies that lie within the electronic gap of the oligomer. If fluctuations are sufficiently strong, a transmission peak within the gap is found at the midgap energy E=0 for degenerate conjugated oligomers (e.g., trans-polyacetylene) and E not equal 0 for AB-type degenerate oligomers. These results can be interpreted in terms of soliton-antisoliton states created by lattice fluctuations. RP Yu, ZG (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. RI Yu, Z/B-5547-2009; OI , Zhi-Gang/0000-0002-1376-9025 NR 19 TC 16 Z9 19 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6494 EP 6497 DI 10.1103/PhysRevB.56.6494 PG 4 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600032 ER PT J AU Khazeni, K Crespi, VH Hone, J Zettl, A Cohen, ML AF Khazeni, K Crespi, VH Hone, J Zettl, A Cohen, ML TI Metal-insulator transition in a C-60: RbC60 and KC60 SO PHYSICAL REVIEW B LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; ORGANIC SUPERCONDUCTORS; RB; FULLERIDES; (KC60)(N); POLYMER; RB3C60; CS AB At zero pressure polymerized RbC60 is an insulator, whereas polymerized KC60 is a metal with a slight low-temperature resistive upturn. We report measurements of the resistivity of RbC60 under pressure, finding a hysteretic resistive transition in RbC60 near 200 K at 5 kbar, at which point the material transforms from insulator to metal. Correcting the resistivity to constant volume, both materials are metallic below the transition with a common low-temperature resistive upturn which is suppressed under compression. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP Khazeni, K (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Hone, James/E-1879-2011; Zettl, Alex/O-4925-2016; OI Hone, James/0000-0002-8084-3301; Zettl, Alex/0000-0001-6330-136X; Crespi, Vincent/0000-0003-3846-3193 NR 28 TC 23 Z9 23 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6627 EP 6630 DI 10.1103/PhysRevB.56.6627 PG 4 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600045 ER PT J AU Shirley, EL Zhu, XJ Louie, SG AF Shirley, EL Zhu, XJ Louie, SG TI Core polarization in solids: Formulation and application to semiconductors SO PHYSICAL REVIEW B LA English DT Article ID QUASI-PARTICLE ENERGIES; NORM-CONSERVING PSEUDOPOTENTIALS; MONTE-CARLO; QUASIPARTICLE ENERGIES; BAND STRUCTURES; BRILLOUIN-ZONE; SPECIAL POINTS; SILICON; ELECTRON; EXCHANGE AB Accurate treatment of exchange and correlation effects involving core and valence electrons can he surprisingly important in solid-state calculations, especially for solids having elements with shallow core electrons, such as Ga and Ge. A local-density-approximation treatment of core-valence interactions leads to errors of similar to 0.4 eV for key features in the band structures of Ge and GaAs, even when valence-valence interactions are treated in a first-principles, quasiparticle approach. We apply a core-polarization-potential treatment of corevalence interactions within the framework of such quasiparticle calculations. Final results have errors of similar to 0.1 eV in band-energy differences. C1 UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. RP NIST, DIV OPT TECHNOL, GAITHERSBURG, MD 20899 USA. NR 68 TC 52 Z9 52 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 SEP 15 PY 1997 VL 56 IS 11 BP 6648 EP 6661 DI 10.1103/PhysRevB.56.6648 PG 14 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600048 ER PT J AU Pfrommer, BG Cote, M Louie, SG Cohen, ML AF Pfrommer, BG Cote, M Louie, SG Cohen, ML TI Ab initio study of silicon in the R8 phase SO PHYSICAL REVIEW B LA English DT Article ID HIGH-PRESSURE; METASTABLE PHASES; TOTAL-ENERGY; SI; PSEUDOPOTENTIALS; APPROXIMATIONS; TRANSITIONS; STABILITY; SOLIDS; STATE AB We present a detailed ab initio study of the electronic and structural properties of the recently discovered R8 phase of silicon. Within the framework of density-functional theory in the local-density approximation and using pseudopotentials with a plane-wave basis, we study the energetics of the R8 phase compared to the other tetrahedrally bonded diamond, beta-Sn, and BC8 phases. The bonding properties and the pressure dependence of the bond lengths of the BC8 and R8 phases an investigated. An analysis of the band structure reveals that R8 silicon could be a semimetal or semiconductor with a small, indirect band gap. Our computed density of states of R8 silicon shows a sharpening of the valence-band edge similar to the one observed for amorphous silicon. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP Pfrommer, BG (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Cote, Michel/H-3942-2012 OI Cote, Michel/0000-0001-9046-9491 NR 26 TC 64 Z9 64 U1 0 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6662 EP 6668 DI 10.1103/PhysRevB.56.6662 PG 7 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600049 ER PT J AU Mizel, A Cohen, ML AF Mizel, A Cohen, ML TI Electronic energy levels in semiconductor nanocrystals: A Wannier function approach SO PHYSICAL REVIEW B LA English DT Article ID CDSE QUANTUM DOTS; PSEUDOPOTENTIAL CALCULATIONS; OPTICAL-ABSORPTION; CLUSTERS; CRYSTALLITES; NANOCLUSTERS; SPECTRA; STATE AB We present a flexible and computationally efficient scheme for calculating electronic eigenstates of semiconductor nanocrystals using Wannier functions. With this method, we compute the band gap of CdS nanocrystals and compare our calculations with experiment. This approach also enables us to study the dependence of the gap on nanocrystal shape. By investigating spherical, cubical, and tetrahedral nanocrystals, we show that the gap is sensitive to the total number of atoms in a nanocrystal but not to their arrangement. Our theoretical analysis gives justification and clarification to the band-structure discretization method. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP Mizel, A (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 25 TC 37 Z9 37 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6737 EP 6741 DI 10.1103/PhysRevB.56.6737 PG 5 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600059 ER PT J AU Ravindran, P Delin, A Ahuja, R Johansson, B Auluck, S Wills, JM Eriksson, O AF Ravindran, P Delin, A Ahuja, R Johansson, B Auluck, S Wills, JM Eriksson, O TI Optical properties of monoclinic SnI2 from relativistic first-principles theory SO PHYSICAL REVIEW B LA English DT Article ID BRILLOUIN-ZONE; ELECTRONIC-STRUCTURE; SPECIAL POINTS; BAND; ENERGIES; PRESSURE; SYSTEMS; SNCL2; STATE; SI AB Within the local-density approximation, using the relativistic full-potential linear muffin-tin orbital method, the electronic structure is calculated for the anisotropic, layered material SnI2. The direct interband transitions are calculated using the full electric-dipole matrix elements between the Kohn-Sham eigenvalues in the ground state of the system. The inclusion of spin-orbit coupling was found to change the optical properties of this material considerably. Polarized absorption and reflection spectra are calculated and compared with recent experimental results. The experimentally suggested cationic excitation for the lowest-energy transition is confirmed. From the site and angular momentum decomposed electronic structure studies and the detailed analysis of the optical spectra it is found that the lowest-energy transition is taking place between Sn 5s (atom type 2a) --> Sn 5p (atom type 4i) states. The ground state calculation was repeated using the tight-binding linear muffin-tin orbital-atomic sphere approximation method, and the resulting band structure agrees very well with the one calculated with the full-potential method. In contrast to recent experimental expectations, our calculations show an indirect band gap, which is in agreement with earlier semiempirical tight-binding calculations as well as with absorption and reflection spectra. C1 UNIV ROORKEE,DEPT PHYS,ROORKEE 247667,UTTAR PRADESH,INDIA. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. RP Ravindran, P (reprint author), UNIV UPPSALA,DEPT PHYS,CONDENSED MATTER THEORY GRP,BOX 530,S-75121 UPPSALA,SWEDEN. RI Eriksson, Olle/E-3265-2014; Delin, Anna/P-2100-2014 OI Eriksson, Olle/0000-0001-5111-1374; Delin, Anna/0000-0001-7788-6127 NR 42 TC 49 Z9 50 U1 1 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 6851 EP 6861 DI 10.1103/PhysRevB.56.6851 PG 11 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600073 ER PT J AU Guimaraes, TC Pavao, AC Taft, CA Lester, WA AF Guimaraes, TC Pavao, AC Taft, CA Lester, WA TI Interaction mechanism of N-2 with the Cr (110) surface SO PHYSICAL REVIEW B LA English DT Article ID ANGLE-RESOLVED PHOTOEMISSION; RAY-ABSORPTION-SPECTRA; HIGHER EXCITED-STATES; ELECTRONIC-STRUCTURE; CHEMISORBED MOLECULES; 3D-METAL SURFACES; TRANSITION-METALS; CO CHEMISORPTION; DISSOCIATION; PRECURSOR AB The interaction:of N-2 With the Cr (110) surface is analyzed using the ab initio Hartree-Fock method and a Cr5N2 cluster. Our results indicate that the tilted state is energetically favored over perpendicular adsorption. The Mulliken surface-->N-2 charge transfer, overlap populations as well as N-N distances increase in the tilted configuration. We also analyze the stretching frequencies, geometrical parameters, natural bond orbital populations, density of states, orbital energies,charge-density distribution and orbital contours. We propose a model to explain the catalytic dissociation of N-2 On the Cr (110) surface. C1 CTR BRASILEIRO PESQUISAS FIS,BR-22290180 RIO JANEIRO,BRAZIL. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV ESTADO BAHIA,DEPT DESENHO & TECNOL,SALVADOR,BA,BRAZIL. RP Guimaraes, TC (reprint author), UNIV FED PERNAMBUCO,DEPT QUIM FUNDAMENTAL,BR-50670900 RECIFE,PE,BRAZIL. RI Pavao, Antonio/I-8002-2014 NR 60 TC 7 Z9 7 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 11 BP 7001 EP 7010 DI 10.1103/PhysRevB.56.7001 PG 10 WC Physics, Condensed Matter SC Physics GA XY806 UT WOS:A1997XY80600093 ER PT J AU Svane, A Trygg, J Johansson, B Eriksson, O AF Svane, A Trygg, J Johansson, B Eriksson, O TI Electronic-structure calculations of praseodymium metal by means of modified density-functional theory SO PHYSICAL REVIEW B LA English DT Article ID ALPHA-GAMMA TRANSITION; HIGH-PRESSURE PHASE; ORBITAL POLARIZATION; CRYSTAL-STRUCTURES; MOTT INSULATORS; CE; SYSTEMS; APPROXIMATION; CERIUM; DELOCALIZATION AB Electronic-structure calculations of elemental praseodymium are presented. Several approximations are used to describe the Prf electrons. It is found that the low-pressure, trivalent phase is well described using either the self-interaction corrected (SIG) local-spin-density (LSD) approximation or the generalized-gradient approximation (GGA) with spin and orbital polarization (OF). In the SIC-LSD approach the Prf electrons are treated explicitly as localized with a localization energy given by the self-interaction of the f orbital. In the GGA+ OP scheme the f-electron localization is described by the onset of spin and orbital polarization, the energetics of which is described by spin-moment formation energy and a term proportional:to the total orbital moment, L-z(2). The high-pressure phase is well described with the f electrons treated as band electrons, in either the LSD or the GGA approximations, of which the latter describes more accurately the experimental equation of state. The calculated pressure of the transition from localized to delocalized behavior is 280 kbar in the SIC-LSD approximation and 156 kbar in the GGA+OP approach, both comparing favorably with the experimentally observed transition pressure of 210 kbar. C1 UNIV UPPSALA, DEPT PHYS, CONDENSED MATTER THEORY GRP, S-75121 UPPSALA, SWEDEN. LOS ALAMOS NATL LAB, CTR MAT SCI, LOS ALAMOS, NM 87544 USA. LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87544 USA. RP Svane, A (reprint author), AARHUS UNIV, INST PHYS & ASTRON, DK-8000 AARHUS C, DENMARK. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 40 TC 33 Z9 33 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 SEP 15 PY 1997 VL 56 IS 12 BP 7143 EP 7148 DI 10.1103/PhysRevB.56.7143 PG 6 WC Physics, Condensed Matter SC Physics GA YA575 UT WOS:A1997YA57500024 ER PT J AU Jimenez, I Terminello, LJ Sutherland, DGJ Carlisle, JA Shirley, EL Himpsel, FJ AF Jimenez, I Terminello, LJ Sutherland, DGJ Carlisle, JA Shirley, EL Himpsel, FJ TI Accurate valence band width of diamond SO PHYSICAL REVIEW B LA English DT Article ID PHOTOELECTRON ANGULAR-DISTRIBUTIONS; FERMI-SURFACE; QUASIPARTICLE ENERGIES; ELECTRON; METALS; STATES; SEMICONDUCTORS; GRAPHITE; PHOTOEMISSION; INSULATORS AB An accurate width is determined,for the valence band of diamond by imaging photoelectron momentum distributions for a variety of initial-and final-state energies. The experimental result of 23.0+/-0.2 eV(2) agrees well with first-principles quasiparticle calculations (23.0 and 22.88 eV) and significantly exceeds the local-density-functional width, 21.5+/-0.2 eV(2). This difference quantifies effects of creating an excited hole state (with associated many-body effects) in a band measurement vs studying ground-state properties treated by local-density-functional calculations. C1 NIST, OPT TECHNOL DIV, GAITHERSBURG, MD 20899 USA. UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA. RP LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RI Jimenez, Ignacio/F-7422-2010 OI Jimenez, Ignacio/0000-0001-5605-3185 NR 31 TC 43 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 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 12 BP 7215 EP 7221 DI 10.1103/PhysRevB.56.7215 PG 7 WC Physics, Condensed Matter SC Physics GA YA575 UT WOS:A1997YA57500031 ER PT J AU Wirtz, L Tang, JZ Burgdorfer, J AF Wirtz, L Tang, JZ Burgdorfer, J TI Geometry-dependent scattering through ballistic microstructures: Semiclassical theory beyond the stationary-phase approximation SO PHYSICAL REVIEW B LA English DT Article ID ABSORPTION FINE-STRUCTURE; CONDUCTANCE FLUCTUATIONS; CHAOTIC SCATTERING; QUANTUM TRANSPORT; OPEN BILLIARDS; CAVITIES; EIGENFUNCTIONS; LOCALIZATION; DYNAMICS; DENSITY AB The conductance of a ballistic microstructure shows strong fluctuations as a function of the Fermi wave number. We present a semiclassical-theory that describes these fluctuations in terms of bundles of short trajectories. These trajectories provide the dominant contribution to electron transport through a weakly open microstructure. For the coupling between the quantum wires and the cavity, contributions beyond the stationary phase approximation are taken into account giving rise to diffraction effects. A comparison with full quantum calculations for st rectangular billiard is made. The peak positions of the power spectrum agree very well between the quantum and semiclassical theories. Numerical evidence is found for the breakdown of the semiclassical approximation for long paths. A simple explanation in terms of the dispersion of the semiclassical wave packet in the interior of the cavity is proposed. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP Wirtz, L (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 38 TC 52 Z9 53 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 12 BP 7589 EP 7597 DI 10.1103/PhysRevB.56.7589 PG 9 WC Physics, Condensed Matter SC Physics GA YA575 UT WOS:A1997YA57500075 ER PT J AU Arko, AJ Joyce, JJ Andrews, AB Thompson, JD Smith, JL Mandrus, D Hundley, MF Cornelius, AL Moshopoulou, E Fisk, Z Canfield, PC Menovsky, A AF Arko, AJ Joyce, JJ Andrews, AB Thompson, JD Smith, JL Mandrus, D Hundley, MF Cornelius, AL Moshopoulou, E Fisk, Z Canfield, PC Menovsky, A TI Strongly correlated electron systems: Photoemission and the single-impurity model SO PHYSICAL REVIEW B LA English DT Article ID HEAVY-FERMION SYSTEMS; KONDO SCALE; STATE AB We present high-resolution, angle-resolved photoemission spectra for Ce-based and U-based strongly correlated electron systems. The experimental results are irreconcilable with the long-accepted single-impurity model, which predicts a narrow singlet state, in close proximity to the Fermi energy, whose linewidth and binding energy are a constant determined by a characteristic temperature TK for the material. We report that both 4f and 5f photoemission features disperse with crystal momentum at temperatures both above and below TK; these are characteristics consistent with narrow bands but not with the single-impurity model. Inclusion of the lattice must be considered at all temperatures. Variants of the periodic Anderson model are consistent with this approach. C1 FLORIDA STATE UNIV,NHMFL,TALLAHASSEE,FL 32306. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. UNIV AMSTERDAM,NAT KUNDIG LAB,NL-1018 XE AMSTERDAM,NETHERLANDS. RP Arko, AJ (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. RI Cornelius, Andrew/A-9837-2008; Mandrus, David/H-3090-2014; Canfield, Paul/H-2698-2014 NR 21 TC 41 Z9 41 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 15 PY 1997 VL 56 IS 12 BP R7041 EP R7044 PG 4 WC Physics, Condensed Matter SC Physics GA YA575 UT WOS:A1997YA57500001 ER PT J AU Lopez, RE Turner, MS Gyuk, G AF Lopez, RE Turner, MS Gyuk, G TI Effect of finite nucleon mass on primordial nucleosynthesis SO PHYSICAL REVIEW D LA English DT Article ID BIG-BANG NUCLEOSYNTHESIS; LITHIUM ABUNDANCE; EVOLUTION; UNIVERSE; DWARFS; STARS; HE-3 AB By numerically evaluating five-dimensional phase-space integrals, we have calculated;the small effect of finite nucleon mass on the weak-interaction rates that interconvert protons and neutrons in the early Universe. We have modified the standard code for primordial nucleosynthesis to include these corrections and find a small, systematic increase in the He-4 yield, Delta Y/Y similar or equal to (0.47-0.50)%, depending slightly on the value of the baryon-to-photon ratio eta. The fractional changes in the abundances of D, He-3, and Li-7 range from 0.06 to 2.8% for 10(-11) less than or equal to eta less than or equal to 10(-8). C1 NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. SISSA,I-34014 TRIESTE,ITALY. RP Lopez, RE (reprint author), UNIV CHICAGO,DEPT PHYS,CHICAGO,IL 60637, USA. NR 37 TC 14 Z9 14 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 15 PY 1997 VL 56 IS 6 BP 3191 EP 3197 DI 10.1103/PhysRevD.56.3191 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA XY575 UT WOS:A1997XY57500004 ER PT J AU Dodelson, S Kinney, WH Kolb, EW AF Dodelson, S Kinney, WH Kolb, EW TI Cosmic microwave background measurements can discriminate among inflation models SO PHYSICAL REVIEW D LA English DT Article ID TENSOR PERTURBATIONS; DARK-MATTER; COSMOLOGY; ANISOTROPY; UNIVERSE; GRAVITY AB Quantum fluctuations during inflation may be responsible for temperature anisotropies in the cosmic microwave background (CMB). Observations of CMB anisotropies can be used to falsify many currently popular models. In this paper we discuss the prospectus for observations of CMB anisotropies at the accuracy of planned satellite missions to reject currently popular inflation models and to provide some direction for model building. C1 UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,ENRICO FERMI INST,CHICAGO,IL 60637. RP Dodelson, S (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 31 TC 138 Z9 139 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 15 PY 1997 VL 56 IS 6 BP 3207 EP 3215 DI 10.1103/PhysRevD.56.3207 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA XY575 UT WOS:A1997XY57500006 ER PT J AU Bagan, E Lavelle, M McMullan, D AF Bagan, E Lavelle, M McMullan, D TI Infrared finite electron propagator SO PHYSICAL REVIEW D LA English DT Article ID PHYSICAL CHARGED SECTORS; QUANTUM ELECTRODYNAMICS; GAUGE-THEORIES; ASYMPTOTIC COMPLETENESS; QUARKS; OBSERVABLES; GLUONS; STATES; COLOR; QCD AB We investigate the properties of a dressed electron which reduces, in a particular class of gauges, to the usual fermion. A one-loop calculation:of the propagator is presented. We show explicitly that an infrared finite, multiplicative, mass shell renormalization is possible for this dressed electron, or, equivalently, for the usual fermion in the above-mentioned gauges. The results are in complete accord with previous conjectures. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. UNIV AUTONOMA BARCELONA,FIS TEOR GRP,E-08193 BELLATERRA,BARCELONA,SPAIN. UNIV PLYMOUTH,SCH MATH & STAT,PLYMOUTH PL4 8AA,DEVON,ENGLAND. RP Bagan, E (reprint author), UNIV AUTONOMA BARCELONA,IFAE,EDIFICIO CN,E-08193 BELLATERRA,BARCELONA,SPAIN. NR 38 TC 23 Z9 23 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 15 PY 1997 VL 56 IS 6 BP 3732 EP 3743 DI 10.1103/PhysRevD.56.3732 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA XY575 UT WOS:A1997XY57500057 ER PT J AU Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassman, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Keeble, L Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mueller, J Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Philips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinalla, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Kakikawa, K Tamura, N Tannenbaum, B Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyodo, H Trischuk, W deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, WJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S AF Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Barone, M Barzi, E Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bevensee, B Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bolla, G Bortoletto, D Boudreau, J Breccia, L Bromberg, C Bruner, N BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chang, PS Chang, PT Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Cocca, E Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demina, R Demortier, L Deninno, M Derwent, PF Devlin, T Dittmann, JR Donati, S Done, J Dorigo, T Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Feild, G Ferretti, C Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fukui, Y Funaki, S Galeotti, S Gallinaro, M Ganel, O GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Giusti, G Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Gotra, Y Goulianos, K Grassman, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Happacher, F Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hinrichsen, B Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kambara, H Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keaffaber, TA Keeble, L Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Korytov, A Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Lami, S Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Liu, YC Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Miao, T Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Moggi, N Morita, Y Mueller, J Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ngan, CYP Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliveira, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Parashar, N Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Philips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Reher, D Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Rolli, S Romano, J Rosenson, L Roser, R Saab, T Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Speer, T Sphicas, P Spinalla, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Kakikawa, K Tamura, N Tannenbaum, B Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Toyodo, H Trischuk, W deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G Valls, J vandenBrink, SC Vejcik, S Velev, G Vidal, R Vilar, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wallace, NB Walsh, AM Wang, C Wang, CH Wang, J Wang, WJ Wang, QF Warburton, A Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Winn, D Wolinski, D Wolinski, J Worm, S Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yu, L Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S TI First observation of the all-hadronic decay of t(t)over-bar pairs SO PHYSICAL REVIEW LETTERS LA English DT Article ID TOP-QUARK PRODUCTION; SILICON VERTEX DETECTOR; (P)OVER-BAR-P COLLISIONS; COLLIDER DETECTOR; CROSS-SECTION; TEV; CDF; FERMILAB; EVENTS AB We present the first observation of the all hadronic decay of t (t) over bar pairs. The analysis is performed using 109 pb(-1) of p (p) over bar collisions at root s = 1.8 TeV collected with the Collider Detector at Fermilab. We observe an excess of events with five or more jets, including one or two b jets, relative to background expectations. Based on this excess we evaluate the production cross section to be in agreement with previous results. We measure the top mass to be 186 +/- 10 +/- 12 GeV/c(2). C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV BOLOGNA,IST NAZL FIS NUCL,I-40127 BOLOGNA,ITALY. BRANDEIS UNIV,WALTHAM,MA 02264. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. DUKE UNIV,DURHAM,NC 28708. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV FLORIDA,GAINESVILLE,FL 33611. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV GENEVA,CH-1211 GENEVA 4,SWITZERLAND. HARVARD UNIV,CAMBRIDGE,MA 02138. HIROSHIMA UNIV,HIGASHIHIROSHIMA 724,JAPAN. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. ERNEST ORLANDO LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV CHICAGO,CHICAGO,IL 60638. UNIV NEW MEXICO,ALBUQUERQUE,NM 87132. OHIO STATE UNIV,COLUMBUS,OH 43320. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,I-36132 PADUA,ITALY. SCUOLA NORMALE SUPER,I-36132 PADUA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15270. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14628. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11530,TAIWAN. TEXAS A&M UNIV,COLLEGE STN,TX 77843. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 315,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53806. YALE UNIV,NEW HAVEN,CT 06511. UNIV PENN,PHILADELPHIA,PA 19104. RP Abe, F (reprint author), NATL LAB HIGH ENERGY PHYS,KEK,TSUKUBA,IBARAKI 315,JAPAN. RI Vucinic, Dejan/C-2406-2008; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014; Introzzi, Gianluca/K-2497-2015; OI Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580; Gallinaro, Michele/0000-0003-1261-2277; Turini, Nicola/0000-0002-9395-5230 NR 15 TC 68 Z9 68 U1 0 U2 4 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 SEP 15 PY 1997 VL 79 IS 11 BP 1992 EP 1997 DI 10.1103/PhysRevLett.79.1992 PG 6 WC Physics, Multidisciplinary SC Physics GA XV835 UT WOS:A1997XV83500009 ER PT J AU Schenkel, T Briere, MA Barnes, AV Hamza, AV Bethge, K SchmidtBocking, H Schneider, DH AF Schenkel, T Briere, MA Barnes, AV Hamza, AV Bethge, K SchmidtBocking, H Schneider, DH TI Charge state dependent energy loss of slow heavy ions in solids SO PHYSICAL REVIEW LETTERS LA English DT Article ID STOPPING-POWER; ELECTRON-EMISSION; URANIUM IONS; SURFACE; NEUTRALIZATION; ACCELERATION; EXCITATION; METALS AB The loss of kinetic energy of slow (nu = 0.3 nu(Bohr)) ions transmitted through thin carbon foils has been measured as a function of projectile charge state in the range from q = 3+ for oxygen to q = 69+ for gold ions. For the first lime, charge state dependent energy loss enhancements have been observed for Xeq+ and Auq+ at q greater than or equal to 40+, indicating strong preequilibrium contributions to the energy loss of slow, highly charged ions in solids. C1 UNIV FRANKFURT,INST KERNPHYS,D-6000 FRANKFURT,GERMANY. RP Schenkel, T (reprint author), LAWRENCE LIVERMORE NATL LAB,PHYS & SPACE TECHNOL DIRECTORATE,LIVERMORE,CA 94550, USA. NR 37 TC 64 Z9 65 U1 0 U2 7 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 SEP 15 PY 1997 VL 79 IS 11 BP 2030 EP 2033 DI 10.1103/PhysRevLett.79.2030 PG 4 WC Physics, Multidisciplinary SC Physics GA XV835 UT WOS:A1997XV83500018 ER PT J AU Armand, P Saboungi, ML Price, DL Iton, L Cramer, C Grimsditch, M AF Armand, P Saboungi, ML Price, DL Iton, L Cramer, C Grimsditch, M TI Nanoclusters in zeolite SO PHYSICAL REVIEW LETTERS LA English DT Article ID SELENIUM; CLUSTERS; CHAINS; MICROCLUSTERS; MORDENITE; CHANNELS; CRYSTAL AB Nanoclusters of Se, Rb-Se, and Cs-Se were incorporated in the supercages of Y zeolite. Anomalous x-ray scattering established that the Se clusters take the form of weakly interacting chains with a disordered structure similar to that of amorphous Se, while the Rb-Se and Cs-Se clusters contain Se-2(2-) Zintl ions as in crystalline and liquid bulk phases. The Raman spectra of the nanoclusters exhibit features found in the bulk disordered phases. C1 ARGONNE NATL LAB, ARGONNE, IL 60439 USA. RI Price, David Long/A-8468-2013; Saboungi, Marie-Louise/C-5920-2013 OI Saboungi, Marie-Louise/0000-0002-0607-4815 NR 26 TC 39 Z9 39 U1 1 U2 4 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 SEP 15 PY 1997 VL 79 IS 11 BP 2061 EP 2064 DI 10.1103/PhysRevLett.79.2061 PG 4 WC Physics, Multidisciplinary SC Physics GA XV835 UT WOS:A1997XV83500026 ER PT J AU Tober, ED Ynzunza, RX Palomares, FJ Wang, Z Hussain, Z VanHove, MA Fadley, CS AF Tober, ED Ynzunza, RX Palomares, FJ Wang, Z Hussain, Z VanHove, MA Fadley, CS TI Interface structures of ordered Fe and Gd overlayers on W(110) from photoelectron diffraction SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY-DIFFRACTION; ELECTRON-DIFFRACTION; SURFACE; GROWTH; FILMS AB Full-solid-angle and site-specific photoelectron diffraction data have been obtained from interface W atoms just beneath (1 x 1) Fe and (7 x 14) Gd monolayers on W(110) by utilizing the core level shift in the W f4(7/2) spectrum. A comparison of experiment with multiple scattering calculations permits determining the Fe adsorption site and the relative interlayer spacing to the first and second W layers. These Fe results are also compared to those from the very different Gd overlayer and from the clean W(110) surface. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,ADV LIGHT SOURCE,BERKELEY,CA 94720. RP Tober, ED (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. RI Van Hove, Michel/A-9862-2008; Palomares, Francisco Javier/C-4605-2011 OI Van Hove, Michel/0000-0002-8898-6921; Palomares, Francisco Javier/0000-0002-4768-2219 NR 17 TC 35 Z9 36 U1 0 U2 4 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 SEP 15 PY 1997 VL 79 IS 11 BP 2085 EP 2088 DI 10.1103/PhysRevLett.79.2085 PG 4 WC Physics, Multidisciplinary SC Physics GA XV835 UT WOS:A1997XV83500032 ER PT J AU Crespi, VH Cohen, ML Rubio, A AF Crespi, VH Cohen, ML Rubio, A TI In situ band gap engineering of carbon nanotubes SO PHYSICAL REVIEW LETTERS LA English DT Article ID MICROTUBULES; GRAPHITE; TUBULES; DEFECTS AB Bond rotation defects close the gap in large-gap nanotubes, open the gap in small-gap nanotubes, and increase the density of states in metallic nanotubes. Not only are these defects likely to be present in as-grown nanotubes, but they could be introduced locally into intact nanotubes, thereby opening a new road towards device applications. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV VALLADOLID,DEPT FIS TEOR,E-47011 VALLADOLID,SPAIN. RI Rubio, Angel/A-5507-2008; OI Rubio, Angel/0000-0003-2060-3151; Crespi, Vincent/0000-0003-3846-3193 NR 21 TC 244 Z9 249 U1 2 U2 23 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 SEP 15 PY 1997 VL 79 IS 11 BP 2093 EP 2096 DI 10.1103/PhysRevLett.79.2093 PG 4 WC Physics, Multidisciplinary SC Physics GA XV835 UT WOS:A1997XV83500034 ER PT J AU Tranquada, JM Wochner, P Buttrey, DJ AF Tranquada, JM Wochner, P Buttrey, DJ TI Spin dynamics in an ordered stripe phase SO PHYSICAL REVIEW LETTERS LA English DT Article ID INCOMMENSURATE MAGNETIC CORRELATIONS; SUPERCONDUCTING LA1.85SR0.15CUO4; NEUTRON-SCATTERING; LA2NIO4+DELTA; HOLES; FLUCTUATIONS; LA2NIO4.125; DEPENDENCE; CHARGE; OXYGEN AB Inelastic neutron scattering has been used to measure the low-energy spin excitations in the ordered charge-stripe phase of La2NiO4+delta with delta = 0.133. Spin-wave-like excitations disperse away from the incommensurate magnetic superlattice points with a velocity similar to 60% of that in the delta = 0 compound. Incommensurate inelastic peaks remain well resolved up to at least twice the magnetic ordering temperature. Paramagnetic scattering from a delta = 0.105 sample, which has a Neel-ordered ground state, shows anomalies suggestive of incipient stripe correlations. Similarities between these results and measurements on superconducting cuprates are discussed. C1 UNIV DELAWARE,DEPT CHEM ENGN,NEWARK,DE 19716. RP Tranquada, JM (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Tranquada, John/A-9832-2009 OI Tranquada, John/0000-0003-4984-8857 NR 35 TC 53 Z9 53 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 SEP 15 PY 1997 VL 79 IS 11 BP 2133 EP 2136 DI 10.1103/PhysRevLett.79.2133 PG 4 WC Physics, Multidisciplinary SC Physics GA XV835 UT WOS:A1997XV83500044 ER PT J AU Nieh, TG Wang, JN Hsiung, LM Wadsworth, J Sikka, V AF Nieh, TG Wang, JN Hsiung, LM Wadsworth, J Sikka, V TI Low temperature superplasticity in a TiAl alloy with a metastable microstructure SO SCRIPTA MATERIALIA LA English DT Article ID INTERMETALLIC COMPOUND; MECHANICAL-PROPERTIES; BEHAVIOR; DEFORMATION; DUCTILITY C1 LOCKHEED MARTIN ENERGY SYST, OAK RIDGE, TN 37831 USA. RP Nieh, TG (reprint author), LAWRENCE LIVERMORE NATL LAB, POB 808, L-369, LIVERMORE, CA 94550 USA. RI Nieh, Tai-Gang/G-5912-2011 OI Nieh, Tai-Gang/0000-0002-2814-3746 NR 16 TC 20 Z9 20 U1 0 U2 2 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 SEP 15 PY 1997 VL 37 IS 6 BP 773 EP 779 DI 10.1016/S1359-6462(97)00163-2 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA XR926 UT WOS:A1997XR92600009 ER PT J AU Youngdahl, CJ Sanders, PG Eastman, JA Weertman, JR AF Youngdahl, CJ Sanders, PG Eastman, JA Weertman, JR TI Compressive yield strengths of nanocrystalline Cu and Pd SO SCRIPTA MATERIALIA LA English DT Article ID BEHAVIOR; MICROHARDNESS; PALLADIUM; COPPER; NICKEL C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP Youngdahl, CJ (reprint author), NORTHWESTERN UNIV,EVANSTON,IL 60208, USA. RI Weertman, Julia/B-7540-2009; Eastman, Jeffrey/E-4380-2011; OI Eastman, Jeff/0000-0002-0847-4265 NR 22 TC 102 Z9 105 U1 3 U2 21 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD SEP 15 PY 1997 VL 37 IS 6 BP 809 EP 813 DI 10.1016/S1359-6462(97)00157-7 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA XR926 UT WOS:A1997XR92600014 ER PT J AU Petri, MC Keiser, DD AF Petri, MC Keiser, DD TI Analysis of interdiffusion in multi-phase systems SO SCRIPTA MATERIALIA LA English DT Article ID U-ZR FUEL RP Petri, MC (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 6 TC 3 Z9 3 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD SEP 15 PY 1997 VL 37 IS 6 BP 821 EP 828 DI 10.1016/S1359-6462(97)00188-7 PG 8 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA XR926 UT WOS:A1997XR92600016 ER PT J AU Choudry, MS Eastman, JA DiMelfi, RJ Dollar, M AF Choudry, MS Eastman, JA DiMelfi, RJ Dollar, M TI Evidence of room temperature ductility in nanocrystalline NiAl from biaxial disk bend tests SO SCRIPTA MATERIALIA LA English DT Article ID MECHANICAL-PROPERTIES C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,REACTOR ENGN DIV,ARGONNE,IL 60439. RP Choudry, MS (reprint author), IIT,DEPT MECH MAT & AEROSP ENGN,CHICAGO,IL 60616, USA. RI Eastman, Jeffrey/E-4380-2011; OI Eastman, Jeff/0000-0002-0847-4265 NR 15 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD SEP 15 PY 1997 VL 37 IS 6 BP 843 EP 849 DI 10.1016/S1359-6462(97)00159-0 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA XR926 UT WOS:A1997XR92600019 ER PT J AU Eramo, R Cavalieri, S Fini, L Matera, M DiMauro, LF AF Eramo, R Cavalieri, S Fini, L Matera, M DiMauro, LF TI Observation of a laser-induced structure in the ionization continuum of sodium atoms using photoelectron energy spectroscopy SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID HARMONIC-GENERATION; RESONANCE; STATES AB We report an experimental analysis of a structure induced by a Nd:YAG laser embedding the sodium 5S(1/2) excited state in the ionization continuum. The induced structure is probed from the ground state via a one-photon ionization. The experiment is performed on an atomic beam apparatus which uses a time-of-flight spectrometer for energy analysing the emitted photoelectrons. The selectivity of this technique provides the best measurement of a laser-induced resonance in the photoionization spectrum reported to date. A good agreement is found between the theory and experimental results. C1 CNR,IST ELETTR QUANTIST,I-50127 FLORENCE,ITALY. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RP Eramo, R (reprint author), UNIV FLORENCE,DIPARTIMENTO FIS,LARGO E FERMI 2,I-50125 FLORENCE,ITALY. NR 21 TC 36 Z9 37 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL, ENGLAND BS1 6BE SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD SEP 14 PY 1997 VL 30 IS 17 BP 3789 EP 3796 DI 10.1088/0953-4075/30/17/009 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA XW785 UT WOS:A1997XW78500009 ER PT J AU Riordan, M AF Riordan, M TI Image and logic - A material culture of microphysics - Galison,P SO NEW YORK TIMES BOOK REVIEW LA English DT Book Review C1 UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. RP Riordan, M (reprint author), STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU NEW YORK TIMES PI NEW YORK PA 229 W 43RD ST, NEW YORK, NY 10036-3959 SN 0028-7806 J9 NEW YORK TIMES BK R JI N. Y. Times Book Rev. PD SEP 14 PY 1997 BP 38 EP 38 PG 1 WC Humanities, Multidisciplinary SC Arts & Humanities - Other Topics GA XU829 UT WOS:A1997XU82900041 ER PT J AU Murray, G Fish, RH AF Murray, G Fish, RH TI Chemical slippers SO NEW SCIENTIST LA English DT Article C1 LAWRENCE BERKELEY LAB,BERKELEY,CA. RP Murray, G (reprint author), UNIV MARYLAND,BALTIMORE,MD 21201, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU NEW SCIENTIST PUBL EXPEDITING INC PI ELMONT PA 200 MEACHAM AVE, ELMONT, NY 11003 SN 0262-4079 J9 NEW SCI JI New Sci. PD SEP 13 PY 1997 VL 155 IS 2099 BP 34 EP 37 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XW766 UT WOS:A1997XW76600031 ER PT J AU Osipiuk, J Joachimiak, A AF Osipiuk, J Joachimiak, A TI Cloning, sequencing, and expression of dnaK-operon proteins from the thermophilic bacterium Thermus thermophilus SO BIOCHIMICA ET BIOPHYSICA ACTA-GENE STRUCTURE AND EXPRESSION LA English DT Article DE dnaK operon; heat shock protein; thermophile; ATPase activity ID HEAT-SHOCK PROTEINS; ESCHERICHIA-COLI; MOLECULAR CHAPERONES; ATP HYDROLYSIS; BACILLUS-SUBTILIS; MULTIGENE FAMILY; GENE; GRPE; POLYMERASE; BINDING AB We propose that the dnaK operon of Thermus thermophilus HB8 is composed of three functionally linked genes: dnaK, grpE, and dnaJ. The dnaK and dnaJ gene products are most closely related to their cyanobacterial homologs. The DnaK protein sequence places T. thermophilus in the plastid Hsp70 subfamily. In contrast, the grpE translated sequence is most similar to GrpE from Clostridium acetobutylicum, a Gram-positive anaerobic bacterium. A single promoter region, with homology to the Escherichia coli consensus promoter sequences recognized by the sigma(70) and sigma(32) transcription factors, precedes the postulated operon. This promoter is heat-shock inducible. The dnaK mRNA level increased more than 30 times upon 10 min of heat shock (from 70 degrees C to 85 degrees C). A strong transcription terminating sequence was found between the dnaK and grpE genes. The individual genes were cloned into pET expression vectors and the thermophilic proteins were overproduced at high levels in E. coli and purified to homogeneity. The recombinant T. thermophilus DnaK protein was shown to have a weak ATP-hydrolytic activity, with an optimum at 90 degrees C. The ATPase was stimulated by the presence of GrpE and DnaJ. Another open reading frame, coding for ClpB heat-shock protein, was found downstream of the dnaK operon. (C) 1997 Published by Elsevier Science B.V. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NORTHWESTERN UNIV,DEPT BIOCHEM MOL BIOL & CELL BIOL,EVANSTON,IL 60208. NR 45 TC 20 Z9 23 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-4781 J9 BBA-GENE STRUCT EXPR JI Biochim. Biophys. Acta-Gene Struct. Expression PD SEP 12 PY 1997 VL 1353 IS 3 BP 253 EP 265 DI 10.1016/S0167-4781(97)00071-7 PG 13 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA YA058 UT WOS:A1997YA05800009 PM 9349721 ER PT J AU Goldfield, EM Gray, SK AF Goldfield, EM Gray, SK TI Vibrational predissociation from different asymmetric rotor levels: Full dimensional quantum dynamics for ArI2 with total angular momentum J=10 SO CHEMICAL PHYSICS LETTERS LA English DT Article ID ENERGY REDISTRIBUTION; VANDERWAALS MOLECULES; RELAXATION; EQUATION; I-2-AR; ARCL2 AB Full dimensional wavepacket calculations were carried out on ArI2 vibrational predissociation with total angular momentum J = 10. For five different values of initial I-2 excitation, we consider the 21 lowest energy levels, corresponding roughly to the 2J + 1 asymmetric rotor levels superimposed on the zero-point motion of the Van der Waals degrees of freedom. In spite of the increased number of available states as J increases, fragmentation occurs via a sparse limit intramolecular vibrational energy redistribution mechanism involving passage through a few intermediate dark states. In addition, averaging over the rotor states does not negate or even decrease Vibrational specificity. (C) 1997 Elsevier Science B.V. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP Goldfield, EM (reprint author), WAYNE STATE UNIV,DEPT CHEM,DETROIT,MI 48202, USA. NR 23 TC 22 Z9 22 U1 0 U2 0 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 SEP 12 PY 1997 VL 276 IS 1-2 BP 1 EP 8 DI 10.1016/S0009-2614(97)00818-X PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XX816 UT WOS:A1997XX81600001 ER PT J AU North, SW Mueller, J Hall, GE AF North, SW Mueller, J Hall, GE TI Vector correlations in the 308 nm photodissociation of ICN SO CHEMICAL PHYSICS LETTERS LA English DT Article ID POTENTIAL-ENERGY SURFACES; A-BAND PHOTODISSOCIATION; ROTATIONAL DISTRIBUTIONS; CN FRAGMENT; 266 NM; PHOTOLYSIS; DYNAMICS; SPECTROSCOPY; DISSOCIATION; ALIGNMENT AB Nascent Doppler profiles of CN (X-2 Sigma(+)) fragments from the 308 nm photodissociation of ICN have been measured using high-resolution transient frequency modulated (FM) absorption spectroscopy. The complete set of vector correlations observable with linearly polarized single photon detection has been determined for several rotational states in v = 0. All detected states exhibit strong positive velocity anisotropy indicating that the initial optical excitation is predominantly a parallel transition, The result challenges recent theoretical work which predicts that at wavelengths >300 nm a perpendicular transition to the (3) Pi(1), state dominates the dissociation. (C) 1997 Elsevier Science B.V. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. CORNELL UNIV,DEPT CHEM,ITHACA,NY 14853. RI North, Simon/G-5054-2012; Hall, Gregory/D-4883-2013 OI North, Simon/0000-0002-0795-796X; Hall, Gregory/0000-0002-8534-9783 NR 33 TC 23 Z9 23 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 SEP 12 PY 1997 VL 276 IS 1-2 BP 103 EP 109 DI 10.1016/S0009-2614(97)00790-2 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XX816 UT WOS:A1997XX81600016 ER PT J AU White, CA Maslen, P Lee, MS HeadGordon, M AF White, CA Maslen, P Lee, MS HeadGordon, M TI The tensor properties of energy gradients within a non-orthogonal basis SO CHEMICAL PHYSICS LETTERS LA English DT Article ID ELECTRONIC-STRUCTURE CALCULATIONS; SYSTEM-SIZE; DENSITY-MATRIX; CONVERGENCE ACCELERATION AB The application of standard minimization techniques to electronic structure theory calculations often requires the formation of an electronic energy gradient. The tensor nature of the electronic gradient, while implicitly treated within an orthogonal basis set, manifests itself explicitly in a non-orthogonal basis set. We apply simple tensor theory to define the electronic gradient in an arbitrary reference frame using the energy minimization method of Li, Nunes and Vanderbilt in a non-orthogonal basis as a concrete example. The minimal basis HeH+ energy surface is used to portray the strong effect of consistently accounting for these tensor properties versus neglecting them. (C) 1997 Published by Elsevier Science B.V. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP White, CA (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI White, Christopher/B-7390-2009 NR 22 TC 45 Z9 45 U1 0 U2 5 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 SEP 12 PY 1997 VL 276 IS 1-2 BP 133 EP 138 DI 10.1016/S0009-2614(97)00813-0 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XX816 UT WOS:A1997XX81600021 ER PT J AU Kautiainen, A Vogel, JS Turteltaub, KW AF Kautiainen, A Vogel, JS Turteltaub, KW TI Dose-dependent binding of trichloroethylene to hepatic DNA and protein at low doses in mice SO CHEMICO-BIOLOGICAL INTERACTIONS LA English DT Article DE TCE; low level dosimetery; accelerator mass spectrometry; radiotracing; DNA adduct; protein adduct ID ACCELERATOR MASS-SPECTROMETRY; RAT-LIVER; PROMOTING ACTIVITIES; SPECIES-DIFFERENCES; METABOLISM; CARCINOGENICITY; ADDUCTS; INVIVO; PHARMACOKINETICS; SENSITIVITY AB Trichloroethylene (TCE) is a widely used industrial chemical and a low level contaminant of surface and ground water in industrialized areas. It is weakly mutagenic in several test systems and carcinogenic in rodents. However, the mechanism for its carcinogenicity is not known. We investigated the binding of [1,2-C-14]TCE ([C-14]TCE) to liver DNA and proteins in male B6C3F1 mice at doses more relevant to humans than used previously. The time course for the binding was studied in animals dosed with 4.1 mu g [C-14]TCE/kg body weight (b.w.) and sacrificed between 0.5 and 120 h after i.p. injection. A dose response study was carried out in mice given [C-14]TCE at doses between 2 mu g/kg and 200 mg/kg b.w. and sacrificed 2 h post-treatment. [C-14]TCE associated with the DNA and protein extracts was measured using accelerator mass spectrometry. The highest level of protein binding (2.4 ng/g protein) was observed 1 h after the treatment followed by a rapid decline, indicating pronounced instability of the adducts and/or rapid turnover of liver proteins. DNA binding was biphasic with the first peak (75 pg/g DNA) at 4 h. However, the highest binding (120 pg/g DNA) was found between 24 and 72 h after the treatment. Dose response curves were linear for both protein and DNA binding. The binding of TCE metabolites to DNA was ca. 100-fold lower than to proteins when calculated per unit weight of macromolecules and when measured 2 h post-exposure. This study shows that TCE metabolites bind to DNA and proteins in a dose-dependent manner in liver, one of the target organs for its tumorigenicity. Thus, protein and DNA adduct formation should be considered as a factor in the tumorigenesis of TCE. (C) 1997 Elsevier Science Ireland Ltd. C1 LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,CTR ACCELERATOR MASS SPECTROMETRY,LIVERMORE,CA 94550. FU NIEHS NIH HHS [ESO-04705] NR 40 TC 26 Z9 29 U1 0 U2 2 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0009-2797 J9 CHEM-BIOL INTERACT JI Chem.-Biol. Interact. PD SEP 12 PY 1997 VL 106 IS 2 BP 109 EP 121 DI 10.1016/S0009-2797(97)00061-6 PG 13 WC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology GA YE291 UT WOS:A1997YE29100002 PM 9366897 ER PT J AU White, INH Martin, EA Mauthe, RJ Vogel, JS Turteltaub, KW Smith, LL AF White, INH Martin, EA Mauthe, RJ Vogel, JS Turteltaub, KW Smith, LL TI Comparisons of the binding of [C-14]radiolabelled tamoxifen or toremifene to rat DNA using accelerator mass spectrometry SO CHEMICO-BIOLOGICAL INTERACTIONS LA English DT Article DE tamoxifen; toremifene; DNA binding; accelerator mass spectrometry; P-32-postlabelling ID BREAST-CANCER PATIENTS; HUMAN LIVER-MICROSOMES; COVALENT BINDING; ADDUCTS; ACTIVATION; 4-HYDROXYTAMOXIFEN; INVOLVEMENT; PROTEINS; DAMAGE; MOUSE AB Tamoxifen, widely used as adjuvant therapy in the treatment of breast cancer, is now undergoing trials as a cancer chemopreventative agent. Previous work has shown an association between P-32-postlabelled adducts in rat liver DNA and the development of liver tumours. With the use of accelerator mass spectrometry, [C-14]tamoxifen was shown to bind to liver DNA of female rats in a dose-dependent manner and was linear over 0.1-1 mg/kg, compatible with the therapeutic dose used in women (20 mg/person per day). Radiolabel could also be detected in extrahepatic organs, including reproductive and GI-tract, where levels were about 18 and 46%, respectively those seen in liver. Following enzymatic hydrolysis of liver DNA, normal nucleotides by HPLC showed < 2% incorporation of the [C-14]radioactivity while > 80% appeared as non-polar products. In contrast, when animals were given an equivalent dose of [C-14]toremifene, binding to DNA was an order of magnitude lower than that seen with tamoxifen and no evidence of non-polar adducted nucleotides following HPLC. However, in vitro, using human, rat or mouse liver microsomal preparations;; NADPH-dependent binding of both toremifene and tamoxifen to calf thymus DNA could be demonstrated, suggesting that under favourable circumstances toremifene is capable of undergoing conversion to reactive intermediates. (C) 1997 Elsevier Science Ireland Ltd. C1 UNIV LEICESTER,MRC,TOXICOL UNIT,LEICESTER LE1 9HN,LEICS,ENGLAND. LAWRENCE LIVERMORE NATL LAB,MOL STRUCT BIOL DIV,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,CTR ACCELERATOR MASS SPECTROMETRY,LIVERMORE,CA 94550. NR 28 TC 30 Z9 30 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0009-2797 J9 CHEM-BIOL INTERACT JI Chem.-Biol. Interact. PD SEP 12 PY 1997 VL 106 IS 2 BP 149 EP 160 DI 10.1016/S0009-2797(97)00063-X PG 12 WC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Toxicology GA YE291 UT WOS:A1997YE29100005 PM 9366900 ER PT J AU Pecharsky, VK Gschneider, KA AF Pecharsky, VK Gschneider, KA TI Phase relationships and crystallography in the pseudobinary system Gd5Si4-Gd5Ge4 SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE crystallography; monoclinic crystal structure; Gd-5(SixGe1-x)(4); pseudobinary system; phase relationships AB A study of phase relationships and crystallography in the pseudobinary system Gd-5(SixGe1-x)(4) revealed: (1) that both terminal binary compounds Gd5Si4 and Gd5Ge4 crystallize in the Sm5Ge4-type orthorhombic structure, and (2) the appearance of an intermediate (ternary) phase with a monoclinic crystal structure which is similar to both Gd5Si4 and Gd5Ge4. The formation of the monoclinic phase at 0.24 less than or equal to x less than or equal to 0.5 [between Gd-5(Si0.96Ge3.03)congruent to Gd-5(Si1Ge3) and Gd-5(Si2Ge2)] is probably due to the large difference in bonding characteristics of Si and Ge in the Gd5Si4-Gd5Ge4 pseudobinary system which limits the ability of the mutual substitution of Si for Ge and vice versa without a change of the crystal structure. For the composition Gd-5(Si2Ge2) the lattice parameters of the monoclinic structure (space group P112(1)/a) are a=7.5808(5), b=14.802(1), c=7.7799(5)Angstrom, gamma=93.190(4)degrees. A distinct difference in the magnetic behaviors of the alloys from three different phase regions in this system follows the distinct difference in the crystal structures observed for the alloys from the three phase regions. (C) 1997 Elsevier Science S.A. C1 IOWA STATE UNIV,DEPT MAT SCI & ENGN,AMES,IA 50011. RP Pecharsky, VK (reprint author), IOWA STATE UNIV,AMES LAB,AMES,IA 50011, USA. NR 10 TC 245 Z9 253 U1 1 U2 21 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD SEP 12 PY 1997 VL 260 IS 1-2 BP 98 EP 106 DI 10.1016/S0925-8388(97)00143-6 PG 9 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA YB357 UT WOS:A1997YB35700021 ER PT J AU Gschneidner, KA Pecharsky, A Dennis, KW AF Gschneidner, KA Pecharsky, A Dennis, KW TI Some observations on the Gd-rich side of the Gd-C system SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE gadolinium-carbon system; crystal structure of Gd2C; hydrolysis of Gd-C alloys; hardness of Gd-C alloys; magnetic properties of Gd-C alloys; Curie temperature of Gd2C AB The phase relationships at the Gd-rich end of the Gd-C system were established. The addition of C expands the lattice parameters of pure Gd, indicating that C dissolves in Gd, but the solid solubility of C is less than 2 at.% below 600 degrees C. Below 600 degrees C the 'Gd2C' phase appears to exist as a line compound, but exhibits a narrow solid solution region above this temperature. This phase is slightly C deficient, i.e., Gd2C1-x, where x=0.015 [Gd2C0.985]. 'Gd2C' has the rhombohedral C19, CdCl2-type structure with a=6.29 Angstrom and alpha=33.70 degrees. The Gd-C alloys are quite reactive in moist air, forming gaseous hydrocarbons and a white powder which flakes off of the metallic ingots, and must be handled in glove boxes. Magnetic measurements indicated that 'Gd2C' orders ferromagnetically at 350 degrees C. This is the highest known magnetic ordering temperature for any binary lanthanide compound which does not contain Fe or Co. (C) 1997 Elsevier Science S.A. C1 IOWA STATE UNIV,DEPT MAT SCI & ENGN,AMES,IA 50011. RP Gschneidner, KA (reprint author), IOWA STATE UNIV,AMES LAB,AMES,IA 50011, USA. NR 7 TC 7 Z9 9 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD SEP 12 PY 1997 VL 260 IS 1-2 BP 107 EP 110 DI 10.1016/S0925-8388(97)00146-1 PG 4 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA YB357 UT WOS:A1997YB35700022 ER PT J AU Lambert, SM Overturf, GE Wilemski, G Letts, SA SchroenCarey, D Cook, RC AF Lambert, SM Overturf, GE Wilemski, G Letts, SA SchroenCarey, D Cook, RC TI Fabrication of low-density foam shells from resorcinol-formaldehyde aerogel SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article DE resorcinol; formaldehyde; organic aerogel; encapsulation; ICF ID LASER FUSION TARGET; IGNITION AB Resorcinol-formaldehyde (RF) aerogel chemistry has been used with encapsulation techniques to fabricate low-density, transparent, foam shells. To accomplish this, the gelation time was reduced from several hours to several minutes by the addition of acid following base-catalyzed RF particle growth. However, additional ''annealing'' of the gel for at least 20 h was needed to maximize crosslinking and minimize swelling in exchange solvents. Increasing the molar ratio of formaldehyde to resorcinol from 2 to 3 also helped to increase crosslinking. Densification of the foam shells due to dehydration during curing was greatly reduced by judicious choice of immiscible oil phases and by saturating the exterior oil phase during the annealing stage. Shells have been produced with diameters of about 2 mm, wall thicknesses ranging from 100 to 200 mu m and foam densities approaching 50 mg/cc. (C) 1997 John Wiley & Sons, Inc. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. SOANE TECHNOL INC,HAYWARD,CA 94545. WJ SCHAFER ASSOCIATES INC,LIVERMORE,CA 94550. NR 27 TC 38 Z9 39 U1 2 U2 10 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD SEP 12 PY 1997 VL 65 IS 11 BP 2111 EP 2122 DI 10.1002/(SICI)1097-4628(19970912)65:11<2111::AID-APP7>3.0.CO;2-K PG 12 WC Polymer Science SC Polymer Science GA XR148 UT WOS:A1997XR14800007 ER PT J AU Yang, LY Lee, CS AF Yang, LY Lee, CS TI Micellar electrokinetic chromatography mass spectrometry SO JOURNAL OF CHROMATOGRAPHY A LA English DT Review DE reviews; micellar electrokinetic chromatography mass spectrometry; detection, electrophoresis ID CAPILLARY ZONE ELECTROPHORESIS; ELECTROSPRAY-IONIZATION INTERFACE; FRACTION COLLECTION; LIQUID-JUNCTION; SEPARATION; PROTEINS; SURFACTANT; PEPTIDES; FIELD AB The combination of micellar electrokinetic chromatography (MEKC) with mass spectrometry (MS) is very attractive for the direct identification of analyte molecules, for the possibility of selectivity enhancement, and for the structure confirmation and analysis in a MS-MS mode. The direct coupling of MEKC with MS can be hazardous due to the effect of nonvolatile MEKC surfactants on MS performance, including the loss of analyte sensitivity and ion source contamination. The possibility of off-line coupling between MEKC and matrix-assisted laser desorption/ionization (MALDI)-MS remains to be investigated. Various approaches for on-line coupling MEKC with electrospray ionization (ESI)-MS, including the use of high-molecular-mass surfactant, an electrospray-chemical ionization (ES-CI) interface, a voltage switching and buffer renewal system, partial-filling micellar plug and anodically migrating micelles, are reviewed and evaluated. The use of an ES-CI interface is most promising for routine operation of on-line MEKC-MS under the influence of nonvolatile salts and surfactants. The use of a high-molecular-mass surfactant allows the formation of a micellar phase at very low surfactant concentrations and avoids the generation of a high level of background ions in the low m/z region. Alternatively, the application of a partial-filling micellar plug and anodically migrating micelles eliminate the introduction of MEKC micelles into the ESI-MS system. It is possible to directly transfer the conventional MEKC separations to partial-filling MEKC-ESI-MS and MEKC-ESI-MS using anodically migrating micelles without any instrument modifications. (C) 1997 Elsevier Science B.V. C1 IOWA STATE UNIV,US DOE,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV,US DOE,AMES LAB,AMES,IA 50011. FU NIGMS NIH HHS [R01 GM 53231] NR 50 TC 39 Z9 42 U1 2 U2 9 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 SEP 12 PY 1997 VL 780 IS 1-2 BP 207 EP 218 DI 10.1016/S0021-9673(97)00295-1 PG 12 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA XX469 UT WOS:A1997XX46900014 PM 9335129 ER PT J AU Max, CE Olivier, SS Friedman, HW An, K Avicola, K Beeman, BV Bissinger, HD Brase, JM Erbert, GV Gavel, DT Kanz, K Liu, MC Macintosh, B Neeb, KP Patience, J Waltjen, KE AF Max, CE Olivier, SS Friedman, HW An, K Avicola, K Beeman, BV Bissinger, HD Brase, JM Erbert, GV Gavel, DT Kanz, K Liu, MC Macintosh, B Neeb, KP Patience, J Waltjen, KE TI Image improvement from a sodium-layer laser guide star adaptive optics system SO SCIENCE LA English DT Article ID TIP-TILT COMPENSATION; PERFORMANCE; TELESCOPES; ASTRONOMY; LIMITS; BEACON AB A sodium-layer laser guide star beacon with high-order adaptive optics al Lick Observatory (Mount Hamilton, California) produced a factor of 2.4 intensity increase and a factor of 2 decrease in full width at half maximum for an astronomical point source, compared with image motion compensation alone, The image full widths at half maximum were identical for laser and natural guide stars (0.3 are second). The Strehl ratio with the laser guide star was 65 percent of that with a natural guide star, This technique should allow ground-based telescopes to attain the diffraction limit, by correcting for atmospheric distortions. C1 UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. UNIV CALIF LOS ANGELES,DEPT PHYS & ASTRON,LOS ANGELES,CA 90024. RP Max, CE (reprint author), LAWRENCE LIVERMORE NATL LAB,7000 EAST AVE,LIVERMORE,CA 94550, USA. OI Max, Claire/0000-0003-0682-5436 NR 22 TC 113 Z9 116 U1 0 U2 6 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD SEP 12 PY 1997 VL 277 IS 5332 BP 1649 EP 1652 DI 10.1126/science.277.5332.1649 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XV684 UT WOS:A1997XV68400046 ER PT J AU Gershenfeld, N Chuang, I AF Gershenfeld, N Chuang, I TI The usefulness of NMR quantum computing - Response SO SCIENCE LA English DT Editorial Material C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP Gershenfeld, N (reprint author), MIT,MEDIA LAB,PHYS & MEDIA GRP,E15-495,20 AMES ST,CAMBRIDGE,MA 02139, USA. NR 5 TC 19 Z9 19 U1 0 U2 4 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD SEP 12 PY 1997 VL 277 IS 5332 BP 1689 EP 1690 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XV684 UT WOS:A1997XV68400059 ER PT J AU Grace, KM Shrouf, K Honkanen, S Ayras, P Katila, P Leppihalme, M Johnston, RG Yang, X Swanson, B Peyghambarian, N AF Grace, KM Shrouf, K Honkanen, S Ayras, P Katila, P Leppihalme, M Johnston, RG Yang, X Swanson, B Peyghambarian, N TI Waveguide Zeeman interferometry for thin-film chemical sensors SO ELECTRONICS LETTERS LA English DT Article DE chemical sensors; optical waveguides; light interferometry AB The authors demonstrate a highly sensitive chemical sensor scheme based on Si3N4 channel waveguides, species-selective surface coatings and Zeeman interferometry. The relative phase change between thr TE and TM modes under exposure to toluene vapour is measured. The measurements demonstrate the real-time and reversible response with good sensitivity at low concentrations. C1 Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA. VTT Elect, FIN-02044 VTT, Finland. RP Honkanen, S (reprint author), Univ Calif Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 5 TC 10 Z9 10 U1 0 U2 3 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD SEP 11 PY 1997 VL 33 IS 19 BP 1651 EP 1653 DI 10.1049/el:19971108 PG 3 WC Engineering, Electrical & Electronic SC Engineering GA YX450 UT WOS:000072041200044 ER PT J AU Zhang, JS Miau, TT Lee, YT AF Zhang, JS Miau, TT Lee, YT TI Crossed molecular beam study of the reaction Br+O-3 SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID ANTARCTIC OZONE; ATMOSPHERIC CHEMISTRY; PHOTOCHEMICAL DATA; KINETICS; MECHANISM; O-3; CHLORINE; RADICALS; BROMINE; SYSTEM AB The reaction of ground-state Br(P-2(3/2)) atom with ozone molecule has been studied by the crossed molecular beams technique at five different center-of-mass (CM) collision energies ranging from 5 to 26 kcal/mol. Product CM translational energy distribution and angular distribution have been derived from experimental data. The average product translational energy ranges from 30 to 60% of the total available energy, BrO product is forward and sideways scattered with respect to the Pr atom in the CM frame, With the increase of collision energy, the fraction of the total energy channeled into products' translation is increased, and the BrO product is scattered to a more forward direction. The product translational energy release depends strongly on the CM scattering angles, with the translational energy in the forward direction larger than that in the backward direction. The Br + O-3 reaction is a direct reaction, and the Pr atom most likely attacks a terminal oxygen atom of the ozone molecule. Detailed comparison of the experimental results for the Cl + O-3 and Pr + O-3 reactions shows that these two reactions have very similar mechanisms. Ozone electronic structure plays a central role in determining the reaction mechanisms. C1 UNIV CALIF RIVERSIDE,LAWRENCE BERKELEY LAB,DIV CHEM SCI,RIVERSIDE,CA 92521. RP Zhang, JS (reprint author), UNIV CALIF RIVERSIDE,DEPT CHEM,RIVERSIDE,CA 92521, USA. RI Lee, Yuan-Tseh/F-7914-2012 NR 39 TC 13 Z9 13 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD SEP 11 PY 1997 VL 101 IS 37 BP 6922 EP 6930 DI 10.1021/jp970860a PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XW315 UT WOS:A1997XW31500017 ER PT J AU Holroyd, RA Preses, JM Hanson, JC AF Holroyd, RA Preses, JM Hanson, JC TI Excited singlet-state yields in hydrocarbon liquids exposed to X-rays SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID HIGH-ENERGY ELECTRONS; FREE ION YIELDS; SATURATED-HYDROCARBONS; CHARGE RECOMBINATION; COMPUTER-SIMULATION; ALKANE SOLUTIONS; TRANS-DECALIN; CIS-DECALIN; FLUORESCENCE; LUMINESCENCE AB The yields of excited singlet states formed in some liquid hydrocarbons are reported for exposure to synchrotron X-rays of energies between 5 and 14 keV. The yields are derived from measurements of ultraviolet fluorescence emission of the hydrocarbons. Results reported are relative to the yield of excited singlets in liquid benzene. The yields decrease with decreasing X-ray energy, and at the lowest energies studied G(S-1*) = 1.5/100 eV for cis- and trans-decalin. Results are compared to computer simulations. RP Holroyd, RA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Hanson, jonathan/E-3517-2010 NR 25 TC 4 Z9 4 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD SEP 11 PY 1997 VL 101 IS 37 BP 6931 EP 6935 DI 10.1021/jp971635w PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XW315 UT WOS:A1997XW31500018 ER PT J AU More, MB Ray, D Armentrout, PB AF More, MB Ray, D Armentrout, PB TI Cation-ether complexes in the gas phase: Bond dissociation energies of M+(dimethyl ether)(x), x = 1-3, M+(1,2-dimethoxyethane)(x), x = 1 and 2, and M+(12-crown-4) where M = Rb and Cs SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID COLLISION-INDUCED DISSOCIATION; CROWN-ETHERS; MACROCYCLE INTERACTION; EQUILIBRIUM STRUCTURES; ION COMPLEXATION; BINDING-ENERGIES; CHARGE-TRANSFER; REACTION-RATES; NUCLEAR WASTE; KINETIC DATA AB Bond dissociation energies of M+[O(CH3)(2)](x), x=1-3; M+[(CH2OCH3)(2)](x), x=1 and 2; and M+[c-(C2H4O)(4)], where M=Rb and Cs are reported. The bond dissociation energies (BDEs) are determined experimentally by analysis of the thresholds for collision-induced dissociation of the cation-ether complexes by xenon (measured using guided ion beam mass spectrometry). In all cases, the primary dissociation channel observed experimentally is endothermic loss of one ligand molecule. The cross section thresholds are interpreted to yield 0 and 298 K BDEs after accounting for the effects of multiple ion-molecule collisions, internal energy of the complexes, and unimolecular decay rates. The experimentally determined BDEs for the monodentate ligand complexes are in good agreement with conventional ideas of electrostatic ligation of gas-phase ions and with recent ab initio calculations by Feller et al. (average discrepancy of 5 +/- 6 kJ/mol). The experimentally determined BDEs for the multidentate ligand complexes do not agree well with conventional ideas of electrostatic ligation of gas-phase ions or with recent ab initio calculations by Feller et al. (average discrepancy of 15 +/- 5 kJ/mol per metal oxygen interaction). The presence of multiple conformers of the multidentate ligand complexes in the experimental apparatus is the likely cause of these large discrepancies. C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. UNIV UTAH, DEPT CHEM, SALT LAKE CITY, UT 84112 USA. NR 60 TC 90 Z9 90 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD SEP 11 PY 1997 VL 101 IS 37 BP 7007 EP 7017 DI 10.1021/jp971642k PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XW315 UT WOS:A1997XW31500029 ER PT J AU Pritychenko, B DaSilva, A Smith, A Barnes, PD Sadoulet, B AF Pritychenko, B DaSilva, A Smith, A Barnes, PD Sadoulet, B TI Experimental measurements with a LiF(W) scintillator SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID DARK-MATTER; DETECTOR AB We have constructed a scintillation detector using LiF(W) and studied its response to neutron and gamma sources. We could not detect any signals from low energy photons because its scintillation efficiency is only 6-7% of the efficiency of NaI(Tl). We did observe the Compton edges due to Cs-137 and K-40 sources. We also observed thermal neutrons by the reaction Li-6(n, alpha)H-3. The thermal neutron peak had a resolution (FWHM) of approximate to 17%. Finally, we observed events due to the cosmic ray muon flux in our laboratory. C1 UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. LAWRENCE BERKELEY LAB,BERKELEY,CA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. NR 14 TC 3 Z9 3 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 SEP 11 PY 1997 VL 396 IS 3 BP 371 EP 373 DI 10.1016/S0168-9002(97)00794-8 PG 3 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XW947 UT WOS:A1997XW94700007 ER PT J AU Peurrung, AJ Bowyer, TW Craig, RA Reeder, PL AF Peurrung, AJ Bowyer, TW Craig, RA Reeder, PL TI Expected atmospheric concentration of Ar-42 SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Letter AB Recent estimates [1,2] of the atmospheric Ar-42 concentration are likely to be low due to neglect of cosmic-ray production via the reaction Ar-40(alpha, 2p) in the upper atmosphere. The calculations in this letter lead to an expected ratio of Ar-42/Ar-40 of roughly 10(-20), compared with existing experimental [2,3] and theoretical upper limits of 10(-18) and 1.3 x 10(-23), respectively. RP Peurrung, AJ (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 18 TC 3 Z9 3 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 SEP 11 PY 1997 VL 396 IS 3 BP 425 EP 426 DI 10.1016/S0168-9002(97)00819-X PG 2 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA XW947 UT WOS:A1997XW94700016 ER PT J AU Walker, PM Cullen, DM Purry, CS Appelbe, DE Byrne, AP Dracoulis, GD Kibedi, T Kondev, FG Lee, LY Macchiavelli, AO Reed, AT Regan, PH Xu, F AF Walker, PM Cullen, DM Purry, CS Appelbe, DE Byrne, AP Dracoulis, GD Kibedi, T Kondev, FG Lee, LY Macchiavelli, AO Reed, AT Regan, PH Xu, F TI K-forbidden transitions from multi-quasiparticle states SO PHYSICS LETTERS B LA English DT Article DE deformed nuclei; K isomers; transition rates ID BARRIER PENETRATION; QUASI-PARTICLE; DECAY; ISOMERS; ALIGNMENT; SELECTION; NUCLEI; HF-174 AB Four-quasiparticle, K-pi = 12(+) states in Hf-172 and W-178, with half-lives less than 2 ns, are found to decay to their respective K-pi = O+ ground-state bands, in competition with transitions to intermediate-K, two-quasiparticle structures. All decay transitions are weakly hindered. When taken together with other K-isomer decay rates, an overall trend of decreasing hindrance with increasing excitation energy is evident. Estimates based on density-of-states considerations approximately reproduce the trend of the data, but also indicate the need to include other K-mixing effects. (C) 1997 Published by Elsevier Science B.V. C1 UNIV LIVERPOOL,DEPT PHYS,OLIVER LODGE LAB,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND. AUSTRALIAN NATL UNIV,RES SCH PHYS SCI & ENGN,DEPT PHYS NUCL,CANBERRA,ACT 0200,AUSTRALIA. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP Walker, PM (reprint author), UNIV SURREY,DEPT PHYS,GUILDFORD GU2 5XH,SURREY,ENGLAND. RI Dracoulis, George/A-8123-2008; Kibedi, Tibor/E-8282-2010; Xu, Furong/K-4178-2013; OI Kibedi, Tibor/0000-0002-9205-7500; Byrne, Aidan/0000-0002-7096-6455 NR 27 TC 76 Z9 76 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD SEP 11 PY 1997 VL 408 IS 1-4 BP 42 EP 46 DI 10.1016/S0370-2693(97)00819-8 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA574 UT WOS:A1997YA57400008 ER PT J AU Dorey, N Khoze, VV Mattis, MP Slater, MJ Weir, WA AF Dorey, N Khoze, VV Mattis, MP Slater, MJ Weir, WA TI Instantons, higher-derivative terms, and nonrenormalization theorems in supersymmetric gauge theories SO PHYSICS LETTERS B LA English DT Article ID N=2; DUALITY; SUPERSPACE AB We discuss the contribution of ADHM multi-instantons to the higher-derivative terms in the gradient expansion along the Coulomb branch of N = 2 and N = 4 supersymmetric SU(2) gauge theories. In particular, using simple scaling arguments, we confirm the Dine-Seiberg nonperturbative nonrenormalization theorems for the 4-derivative/8-fermion term in the two finite theories (N = 4, and N = 2 with N-F = 4). (C) 1997 Elsevier Science B.V. C1 UNIV DURHAM,CTR PARTICLE THEORY,DURHAM DH1 3LE,ENGLAND. LOS ALAMOS NATL LAB,THEORET DIV T8,LOS ALAMOS,NM 87545. RP Dorey, N (reprint author), UNIV COLL SWANSEA,DEPT PHYS,SWANSEA SA2 8PP,W GLAM,WALES. OI Khoze, Valentin V/0000-0003-3006-4147 NR 27 TC 20 Z9 20 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD SEP 11 PY 1997 VL 408 IS 1-4 BP 213 EP 221 DI 10.1016/S0370-2693(97)00806-X PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA574 UT WOS:A1997YA57400031 ER PT J AU Jadach, S Ward, BFL Was, Z AF Jadach, S Ward, BFL Was, Z TI e(+)e(-) annihilation into hadrons at LEP2 in the presence of the anomalous DESY positron-jet event phenomenon SO PHYSICS LETTERS B LA English DT Article ID RADIATIVE-CORRECTIONS; PAIR PRODUCTION; CROSS-SECTION; LEPTOQUARKS; SLC/LEP; LEPTON; BOUNDS AB We discuss the allowed parameter regime in the coupling-mass plane implied by the existing LEP2 data on e(+)e(-) --> hadrons at 172.3 GeV for the leptoquark interpretation of the anomalous DESY positron-jet events for four different models of the leptoquark charges and chiral couplings to quarks, for both a loose cut on s'/s and a tight cut on s'/s. We find that this interpretation of the DESY phenomenon is still consistent with the LEP2 data although, for vector leptoquarks, a significant regime of the relevant parameter space is already excluded, (C) 1997 Published by Elsevier Science B.V. C1 INST NUCL PHYS, KRAKOW, POLAND. UNIV TENNESSEE, DEPT PHYS & ASTRON, KNOXVILLE, TN 37996 USA. STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. RP CERN, DIV THEORY, CH-1211 GENEVA 23, SWITZERLAND. NR 23 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD SEP 11 PY 1997 VL 408 IS 1-4 BP 281 EP 287 DI 10.1016/S0370-2693(97)00750-8 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA574 UT WOS:A1997YA57400041 ER PT J AU Meissner, UG Mull, V Speth, J VanOrden, JW AF Meissner, UG Mull, V Speth, J VanOrden, JW TI Strange vector currents and the OZI-rule SO PHYSICS LETTERS B LA English DT Article ID MESON-EXCHANGE MODEL; MAGNETIC-MOMENT; NN INTERACTION; FORM-FACTORS; NUCLEON; BARYONS; RADIUS AB We investigate within a meson-exchange model the OZI allowed coupling of the phi meson to the nucleon with the inclusion of kaon loops and hyperon excitations. All parameters of the model have previously been determined from a variety of hadronic reactions. A strong cancellation of the Various contributions is observed which results in a small phi NN coupling. We also show that a realistic isoscalar spectral function including the correlated pi rho exchange leads to sizeably reduced strange vector form factors based on the dispersion-theoretical analysis of the nucleons' electromagnetic form factors explaining our previous result. (C) 1997 Published by Elsevier Science B.V. C1 OLD DOMINION UNIV, DEPT PHYS, NORFOLK, VA 23529 USA. JEFFERSON LAB, NEWPORT NEWS, VA 23606 USA. RP FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, IKP THEORIE, POSTFACH 1913, D-52425 JULICH, GERMANY. NR 28 TC 72 Z9 73 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD SEP 11 PY 1997 VL 408 IS 1-4 BP 381 EP 386 DI 10.1016/S0370-2693(97)00828-9 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA574 UT WOS:A1997YA57400055 ER PT J AU Acciarri, M Adriani, O AguilarBenitez, M Ahlen, S Alcaraz, J Alemanni, G Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Anselmo, F Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Banerjee, S Banerjee, S Banicz, K Barczyk, A Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Rattiston, R Bay, A Becattini, F Becker, U Behner, F Berdugo, J Berges, P Bertucci, B Betev, BL Bhattacharya, S Biasini, M Biland, A Bilei, GM Blaising, JJ Blyth, SC Bobbink, GJ Bock, R Bohm, A Boldizsar, L Borgia, B Bourilkov, D Bourquin, M Braccini, S Branson, JG Brigljevic, V Brook, IC Buffini, A Buijs, A Burger, JD Burger, WJ Busenitz, J Button, A Cai, XD Campanelli, M Capell, M Romeo, GC Carlino, G Cartacci, AM Casaus, J Castellini, G Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chang, YH Chaturvedi, UK Chekanov, SV Chemarin, M Chen, A Chen, G Chen, GM Chen, HF Chen, HS Chereau, X Chiefari, G Chien, CY Cifarelli, L Cindolo, F Civinini, C Clare, I Clare, R Cohn, HO Coignet, G Colijn, AP Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Csilling, A Dai, TS DAlessandro, R deAsmundis, R Degre, A Deiters, K dellaVolpe, D Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dova, MT Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabre, M Faccini, R Falciano, S Favara, A Fay, J Fedin, O Felcini, M Fenyi, B Ferguson, T Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Fisk, I Forconi, G Fredj, L Freudenreich, K Furetta, C Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZF Gougas, A Gratta, G Gruenewald, MW Gupta, VK Gurtu, A Gutay, LJ Hartmann, B Hasan, A Hatzifotiadou, D Hebbeker, T Herve, A vanHoek, WC Hofer, H Hong, SJ Hoorani, H Hou, SR Hu, G Innocente, V Jenkes, K Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamrad, D Kamyshkov, Y Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, DH Kim, JK Kim, SC Kim, YG Kinnison, WW Kirkby, A Kirkby, D Kirkby, J Kiss, D Kittel, W Klimentov, A Konig, AC Kopp, A Korolko, I Koutsenko, V Kraemer, RW Krenz, W Kunin, A deGuevara, PL Laktineh, I Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P LeGoff, JM Leiste, R Leonardi, E Levtchenko, P Li, C Lin, CH Lin, WT Linde, FL Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Luminari, L Lustermann, W Ma, WG Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangeol, D Mangla, S Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG McNally, D McNeil, RR Mele, S Merola, L Meschini, M Metzger, WJ vonderMey, M Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Molnar, P Monteleoni, B Moore, R Morganti, S Moulik, T Mount, R Muller, S Muheim, F Muijs, AJM Nahn, S Napolitano, M NessiTedaldi, F Newman, H Niessen, T Nippe, A Nisati, A Nowak, H Oh, YD Opitz, H Organtini, G Ostonen, R Palomares, C Pandoulas, D Paoletti, S Paolucci, P Park, HK Park, IH Pascale, G Passaleva, G Patricelli, S Paul, T Pauluzzi, M Paus, C Pauss, F Peach, D Pei, YJ Pensotti, S PerretGallix, D Petersen, B Petrak, S Pevsner, A Piccolo, D Pieri, M Pinto, JC Piroue, PA Pistolesi, E Plyaskin, V Pohl, M Pojidaev, V Postema, H Produit, N Prokofiev, D RahalCallot, G Raja, N Rancoita, PG Rattaggi, M Raven, G Razis, P Read, K Ren, D Rescigno, M Reucroft, S vanRhee, T Riemann, S Riles, K Robohm, A Rodin, J Roe, BP Romero, L RosierLees, S Rosselet, P vanRossum, W Roth, S Rubio, JA Ruschmeier, D Rykaczewski, H Salicio, J Sanchez, E Sanders, MP Sarakinos, ME Sarkar, S Sassowsky, M Schafer, C Schegelsky, V SchmidtKaerst, S Schmitz, D Schmitz, P Scholz, N Schopper, H Schotanus, DJ Schwenke, J Schwering, G Sciacca, C Sciarrino, D Servoli, L Shevchenko, S Shivarov, N Shoutko, V Shukla, J Shumilov, E Shvorob, A Siedenburg, T Son, D Sopczak, A Smith, B Spillantini, P Steuer, M Stickland, DP Stone, A Stone, H Stoyanov, B Straessner, A Strauch, K Sudhakar, K Sultanov, G Sun, LZ Susinno, GF Suter, H Swain, JD Tang, XW Tauscher, L Taylor, L Ting, SCC Ting, SM Tonutti, M Tonwar, SC Toth, J Tully, C Tuchscherer, H Tung, KL Uchida, Y Ulbricht, J Uwer, U Valente, E VandeWalle, RT Vesztergombi, G Vetlitsky, I Viertel, G Vivargent, M Volkert, R Vogel, H Vogt, H Vorobiev, I Vorobyov, AA Vorvolakos, A Wadhwa, M Wallraff, W Wang, JC Wang, XL Wang, ZM Weber, A Wittgenstein, F Wu, SX Wynhoff, S Xu, J Xu, ZZ Yang, BZ Yang, CG Yao, XY Ye, JB Yeh, SC You, JM Zalite, A Zalite, Y Zemp, P Zeng, Y Zhang, Z Zhang, ZP Zhou, B Zhu, GY Zhu, RY Zichichi, A Ziegler, F AF Acciarri, M Adriani, O AguilarBenitez, M Ahlen, S Alcaraz, J Alemanni, G Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Anselmo, F Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Banerjee, S Banerjee, S Banicz, K Barczyk, A Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Rattiston, R Bay, A Becattini, F Becker, U Behner, F Berdugo, J Berges, P Bertucci, B Betev, BL Bhattacharya, S Biasini, M Biland, A Bilei, GM Blaising, JJ Blyth, SC Bobbink, GJ Bock, R Bohm, A Boldizsar, L Borgia, B Bourilkov, D Bourquin, M Braccini, S Branson, JG Brigljevic, V Brook, IC Buffini, A Buijs, A Burger, JD Burger, WJ Busenitz, J Button, A Cai, XD Campanelli, M Capell, M Romeo, GC Carlino, G Cartacci, AM Casaus, J Castellini, G Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chang, YH Chaturvedi, UK Chekanov, SV Chemarin, M Chen, A Chen, G Chen, GM Chen, HF Chen, HS Chereau, X Chiefari, G Chien, CY Cifarelli, L Cindolo, F Civinini, C Clare, I Clare, R Cohn, HO Coignet, G Colijn, AP Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Csilling, A Dai, TS DAlessandro, R deAsmundis, R Degre, A Deiters, K dellaVolpe, D Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dova, MT Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabre, M Faccini, R Falciano, S Favara, A Fay, J Fedin, O Felcini, M Fenyi, B Ferguson, T Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Fisk, I Forconi, G Fredj, L Freudenreich, K Furetta, C Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZF Gougas, A Gratta, G Gruenewald, MW Gupta, VK Gurtu, A Gutay, LJ Hartmann, B Hasan, A Hatzifotiadou, D Hebbeker, T Herve, A vanHoek, WC Hofer, H Hong, SJ Hoorani, H Hou, SR Hu, G Innocente, V Jenkes, K Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamrad, D Kamyshkov, Y Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, DH Kim, JK Kim, SC Kim, YG Kinnison, WW Kirkby, A Kirkby, D Kirkby, J Kiss, D Kittel, W Klimentov, A Konig, AC Kopp, A Korolko, I Koutsenko, V Kraemer, RW Krenz, W Kunin, A deGuevara, PL Laktineh, I Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P LeGoff, JM Leiste, R Leonardi, E Levtchenko, P Li, C Lin, CH Lin, WT Linde, FL Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Luminari, L Lustermann, W Ma, WG Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangeol, D Mangla, S Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG McNally, D McNeil, RR Mele, S Merola, L Meschini, M Metzger, WJ vonderMey, M Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Molnar, P Monteleoni, B Moore, R Morganti, S Moulik, T Mount, R Muller, S Muheim, F Muijs, AJM Nahn, S Napolitano, M NessiTedaldi, F Newman, H Niessen, T Nippe, A Nisati, A Nowak, H Oh, YD Opitz, H Organtini, G Ostonen, R Palomares, C Pandoulas, D Paoletti, S Paolucci, P Park, HK Park, IH Pascale, G Passaleva, G Patricelli, S Paul, T Pauluzzi, M Paus, C Pauss, F Peach, D Pei, YJ Pensotti, S PerretGallix, D Petersen, B Petrak, S Pevsner, A Piccolo, D Pieri, M Pinto, JC Piroue, PA Pistolesi, E Plyaskin, V Pohl, M Pojidaev, V Postema, H Produit, N Prokofiev, D RahalCallot, G Raja, N Rancoita, PG Rattaggi, M Raven, G Razis, P Read, K Ren, D Rescigno, M Reucroft, S vanRhee, T Riemann, S Riles, K Robohm, A Rodin, J Roe, BP Romero, L RosierLees, S Rosselet, P vanRossum, W Roth, S Rubio, JA Ruschmeier, D Rykaczewski, H Salicio, J Sanchez, E Sanders, MP Sarakinos, ME Sarkar, S Sassowsky, M Schafer, C Schegelsky, V SchmidtKaerst, S Schmitz, D Schmitz, P Scholz, N Schopper, H Schotanus, DJ Schwenke, J Schwering, G Sciacca, C Sciarrino, D Servoli, L Shevchenko, S Shivarov, N Shoutko, V Shukla, J Shumilov, E Shvorob, A Siedenburg, T Son, D Sopczak, A Smith, B Spillantini, P Steuer, M Stickland, DP Stone, A Stone, H Stoyanov, B Straessner, A Strauch, K Sudhakar, K Sultanov, G Sun, LZ Susinno, GF Suter, H Swain, JD Tang, XW Tauscher, L Taylor, L Ting, SCC Ting, SM Tonutti, M Tonwar, SC Toth, J Tully, C Tuchscherer, H Tung, KL Uchida, Y Ulbricht, J Uwer, U Valente, E VandeWalle, RT Vesztergombi, G Vetlitsky, I Viertel, G Vivargent, M Volkert, R Vogel, H Vogt, H Vorobiev, I Vorobyov, AA Vorvolakos, A Wadhwa, M Wallraff, W Wang, JC Wang, XL Wang, ZM Weber, A Wittgenstein, F Wu, SX Wynhoff, S Xu, J Xu, ZZ Yang, BZ Yang, CG Yao, XY Ye, JB Yeh, SC You, JM Zalite, A Zalite, Y Zemp, P Zeng, Y Zhang, Z Zhang, ZP Zhou, B Zhu, GY Zhu, RY Zichichi, A Ziegler, F TI Cross section of hadron production in gamma gamma collisions at LEP SO PHYSICS LETTERS B LA English DT Article ID DETECTOR AB The reaction e(+)e(-) --> e(+)e(-)gamma*gamma* --> e(+)e(-) hadrons is analysed using data collected by the L3 detector during the LEP runs at root s= 130-140 GeV and root s= 161 GeV. The cross sections sigma(e(+)e(-) --> e(+)e(-) hadrons) and sigma(gamma gamma --> hadrons) are measured in the interval 5 less than or equal to W-gamma gamma less than or equal to 75 GeV. The energy dependence of the sigma(gamma gamma --> hadrons) cross section is consistent with the universal Regge behaviour of total hadronic cross sections. (C) 1997 Published by Elsevier Science B.V. C1 RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY. RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY. NIKHEF H, NATL INST HIGH ENERGY PHYS, NL-1009 DB AMSTERDAM, NETHERLANDS. UNIV AMSTERDAM, NL-1009 DB AMSTERDAM, NETHERLANDS. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. LAB ANNECY LE VIEUX PHYS PARTICULES, LAPP, IN2P3, CNRS, F-74941 ANNECY LE VIEUX, FRANCE. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND. LOUISIANA STATE UNIV, BATON ROUGE, LA 70803 USA. INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA. HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY. UNIV BOLOGNA, I-40126 BOLOGNA, ITALY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA. BOSTON UNIV, BOSTON, MA 02215 USA. NORTHEASTERN UNIV, BOSTON, MA 02115 USA. INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA. UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA. HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY. HARVARD UNIV, CAMBRIDGE, MA 02139 USA. MIT, CAMBRIDGE, MA 02139 USA. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. UNIV FLORENCE, I-50125 FLORENCE, ITALY. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. WORLD LAB, FBLIA PROJECT, CH-1211 GENEVA 23, SWITZERLAND. UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND. UNIV SCI & TECHNOL CHINA, HEFEI 230029, ANHUI, PEOPLES R CHINA. RES INST HIGH ENERGY PHYS, SEFT, SF-00014 HELSINKI, FINLAND. UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND. UNIV LECCE, I-73100 LECCE, ITALY. IST NAZL FIS NUCL, I-73100 LECCE, ITALY. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV LYON 1, IN2P3, CNRS, INST NUCL PHYS, F-69622 VILLEURBANNE, FRANCE. CIEMAT, E-28040 MADRID, SPAIN. IST NAZL FIS NUCL, I-20133 MILAN, ITALY. INST THEORET & EXPT PHYS, MOSCOW 117259, RUSSIA. IST NAZL FIS NUCL, I-80125 NAPLES, ITALY. UNIV NAPLES, I-80125 NAPLES, ITALY. UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS. UNIV NIJMEGEN, NL-6525 ED NIJMEGEN, NETHERLANDS. NATL INST NUCL PHYS & HIGH ENERGY PHYS, NL-6525 ED NIJMEGEN, NETHERLANDS. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. CALTECH, PASADENA, CA 91125 USA. IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY. UNIV PERUGIA, I-06100 PERUGIA, ITALY. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. PRINCETON UNIV, PRINCETON, NJ 08544 USA. UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY. IST NAZL FIS NUCL, I-00185 ROME, ITALY. RUSSIAN ACAD SCI, INST NUCL PHYS, ST PETERSBURG, RUSSIA. UNIV SALERNO, I-84100 SALERNO, ITALY. IST NAZL FIS NUCL, I-84100 SALERNO, ITALY. UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA. UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO DE COMPOSTELA, SPAIN. BULGARIAN ACAD SCI, CENT LAB MECHATR & INSTRUMENTAT, BU-1113 SOFIA, BULGARIA. KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA. UNIV ALABAMA, TUSCALOOSA, AL 35486 USA. UNIV UTRECHT, NL-3584 CB UTRECHT, NETHERLANDS. NIKHEF H, NL-3584 CB UTRECHT, NETHERLANDS. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND. DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY. ETH ZURICH, CH-8093 ZURICH, SWITZERLAND. UNIV HAMBURG, D-22761 HAMBURG, GERMANY. RP IST NAZL FIS NUCL, VIA CELORIA 16, I-20133 MILAN, ITALY. RI Sanchez, Eusebio/H-5228-2015; Duran, Ignacio/H-7254-2015; Rancoita, Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Palomares, Carmen/H-7783-2015; Fedin, Oleg/H-6753-2016; Roth, Stefan/J-2757-2016; Kamyshkov, Yuri/J-7999-2016; Di Lodovico, Francesca/L-9109-2016; Cerrada, Marcos/J-6934-2014; de la Cruz, Begona/K-7552-2014; Josa, Isabel/K-5184-2014; Vogel, Helmut/N-8882-2014; Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015; D'Alessandro, Raffaello/F-5897-2015; Fiandrini, Emanuele/C-4549-2008; Lista, Luca/C-5719-2008; Kirkby, Jasper/A-4973-2012; Servoli, Leonello/E-6766-2012; bertucci, bruna/J-5237-2012; Cavallo, Nicola/F-8913-2012 OI Castellini, Guido/0000-0002-0177-0643; Read, Kenneth/0000-0002-3358-7667; Diemoz, Marcella/0000-0002-3810-8530; Doria, Alessandra/0000-0002-5381-2649; Sciacca, Crisostomo/0000-0002-8412-4072; Faccini, Riccardo/0000-0003-2613-5141; Filthaut, Frank/0000-0003-3338-2247; Goldstein, Joel/0000-0003-1591-6014; Sanchez, Eusebio/0000-0002-9646-8198; Rancoita, Pier Giorgio/0000-0002-1990-4283; Palomares, Carmen/0000-0003-4374-9065; Roth, Stefan/0000-0003-3616-2223; Kamyshkov, Yuri/0000-0002-3789-7152; Di Lodovico, Francesca/0000-0003-3952-2175; Longo, Egidio/0000-0001-6238-6787; Ambrosi, Giovanni/0000-0001-6977-9559; Cerrada, Marcos/0000-0003-0112-1691; Vogel, Helmut/0000-0002-6109-3023; Ferguson, Thomas/0000-0001-5822-3731; Berdugo, Javier/0000-0002-7911-8532; D'Alessandro, Raffaello/0000-0001-7997-0306; Kirkby, Jasper/0000-0003-2341-9069; Servoli, Leonello/0000-0003-1725-9185; NR 25 TC 63 Z9 63 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD SEP 11 PY 1997 VL 408 IS 1-4 BP 450 EP 464 DI 10.1016/S0370-2693(97)00933-7 PG 15 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA YA574 UT WOS:A1997YA57400066 ER PT J AU Hrijac, JA Eylem, C Zhu, Q Sabatini, R Petrakis, L Hu, RZ Block, J AF Hrijac, JA Eylem, C Zhu, Q Sabatini, R Petrakis, L Hu, RZ Block, J TI On the use of X-ray powder diffraction for determining low levels of chrysotile asbestos in gypsum-based bulk materials: use of a synchrotron source SO ANALYTICA CHIMICA ACTA LA English DT Article DE asbestos; quantitative analysis; synchrotron XRD ID SAMPLES AB The use of synchrotron X-ray powder diffraction for the quantitative analysis of very low levels (0.25-3.5wt%) of chrysotile asbestos in bulk samples is examined. A study of chrysotile :in a pure alumina matrix indicates that the detection limit is ca. 0.1wt% and the quantification limit ca. 0.2wt%. A second study using a more complex matrix, chrysotile in a gypsum-vermiculite mixture, indicates a quantification limit between ca. 0.25 and 0.5wt% for dehydrated samples. The sensitivity of the method can be increased if appropriate chemical pre-treatments using sodium ethylenediamminetetraacetate (EDTA) are performed to remove the gypsum, which is the major component of the mixture. A study of the EDTA treated materials shows no change in the chrysotile and confirms the use of this procedure. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. WR GRACE & CO CONN,COLUMBIA,MD 21044. NR 27 TC 3 Z9 3 U1 2 U2 5 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 SEP 10 PY 1997 VL 350 IS 1-2 BP 221 EP 229 DI 10.1016/S0003-2670(97)00320-6 PG 9 WC Chemistry, Analytical SC Chemistry GA XW242 UT WOS:A1997XW24200026 ER PT J AU Alcock, C Allsman, RA Alves, D Axelrod, TS Becker, AC Bennett, DP Cook, KH Freeman, KC Griest, K Guern, J Lehner, MJ Marshall, SL Petersons, BA Pratt, MR Quinn, PJ Rodgers, AW Stubbs, CW Sutherland, W Welch, DL AF Alcock, C Allsman, RA Alves, D Axelrod, TS Becker, AC Bennett, DP Cook, KH Freeman, KC Griest, K Guern, J Lehner, MJ Marshall, SL Petersons, BA Pratt, MR Quinn, PJ Rodgers, AW Stubbs, CW Sutherland, W Welch, DL TI The MACHO Project Large Magellanic Cloud microlensing results from the first two years and the nature of the Galactic dark halo SO ASTROPHYSICAL JOURNAL LA English DT Article DE dark matter; Galaxy, halo; gravitational lensing; Magellanic Clouds; stars, low-mass, brown dwarfs; white dwarfs ID GRAVITATIONAL LENSING EXPERIMENT; DEUTERIUM ABUNDANCE; PLANETARY SYSTEMS; MATTER; GALAXY; BULGE; CANDIDATE; OBJECTS; STARS; PROGRAM AB The MACHO Project is a search for dark matter in the form of massive compact halo objects (MACHOs). Photometric monitoring of millions of stars in the Large Magellanic Cloud (LMC), Small Magellanic Cloud (SMC), and Galactic bulge is used to search for gravitational microlensing events caused by these otherwise invisible objects. Analysis of the first 2.1 yr of photometry of 8.5 million stars in the LMC reveals eight candidate microlensing events. This is substantially more than the number expected (similar to 1.1) from lensing by known stellar populations. The timescales (t) of the events range from 34 to 145 days. We estimate the total microlensing optical depth toward the LMC from events with 2 < (t) over cap < 200 days to be tau(2)(200) = 2.9(-0.9)(+1.4) x 10(-7) based upon our eight event sample. This exceeds the optical depth, tau(background) = 0.5 x 10(-7), expected from known stars, and the difference is to be compared with the optical depth predicted for a ''standard'' halo composed entirely of MACHOs: tau(halo) = 4.7 x 10(-7). To compare with Galactic halo models, we perform likelihood analyses on the full eight-event sample and a six-event subsample (which allows for two events to be caused by a nonhalo ''background''). This gives a fairly model-independent estimate of the halo mass in MACHOs within 50 kpc of 2.0(-0.7)(+1.2) x 10(11) M-., which is about half of the ''standard halo'' value. We also find a most probable MACHO mass of 0.5(-0.2)(+0.3) M-., although this value is strongly model dependent. In addition, the absence of short duration events places stringent upper limits on the contribution of low-mass MACHOs: objects from 10(-4) M-. to 0.03 M-. contribute less than or similar to 20% of the ''standard'' dark halo. C1 UNIV CALIF BERKELEY, CTR PARTICLE ASTROPHYS, BERKELEY, CA 94720 USA. AUSTRALIAN NATL UNIV, SUPERCOMP FACIL, CANBERRA, ACT 0200, AUSTRALIA. UNIV CALIF DAVIS, DEPT PHYS, DAVIS, CA 95616 USA. AUSTRALIAN NATL UNIV, MT STROMLO & SIDING SPRING OBSERV, WESTON, ACT 2611, AUSTRALIA. UNIV WASHINGTON, DEPT ASTRON, SEATTLE, WA 98195 USA. UNIV WASHINGTON, DEPT PHYS, SEATTLE, WA 98195 USA. UNIV NOTRE DAME, DEPT PHYS, NOTRE DAME, IN 46556 USA. UNIV CALIF SAN DIEGO, DEPT PHYS, LA JOLLA, CA 92093 USA. UNIV CALIF SANTA BARBARA, DEPT PHYS, SANTA BARBARA, CA 93106 USA. EUROPEAN SO OBSERV, D-85748 GARCHING, GERMANY. UNIV OXFORD, DEPT PHYS, OXFORD OX1 3RH, ENGLAND. MCMASTER UNIV, DEPT PHYS & ASTRON, HAMILTON, ON L8S 4M1, CANADA. RP Alcock, C (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. RI Stubbs, Christopher/C-2829-2012; Quinn, Peter/B-3638-2013 OI Stubbs, Christopher/0000-0003-0347-1724; NR 72 TC 409 Z9 411 U1 0 U2 3 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 SEP 10 PY 1997 VL 486 IS 2 BP 697 EP 726 DI 10.1086/304535 PN 1 PG 30 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA XX173 UT WOS:A1997XX17300009 ER PT J AU Clayton, DD Arnett, D Kane, J Meyer, BS AF Clayton, DD Arnett, D Kane, J Meyer, BS TI Type X silicon carbide presolar grains: Type Ia supernova condensates? SO ASTROPHYSICAL JOURNAL LA English DT Article DE dust, extinction; ISM, abundances; ISM, molecules; nuclear reactions, nucleosynthesis, abundances; supernovae, general ID MURCHISON METEORITE; ISOTOPIC COMPOSITIONS; WHITE-DWARFS; SIC GRAINS; GRAPHITE; ORIGIN; NUCLEOSYNTHESIS; EXPLOSIONS; NITROGEN; DENSITY AB In terms of nucleosynthesis issues alone, we demonstrate that the type X silicon carbide particles have chemical and isotopic compositions resembling those from explosive helium burning in N-14-rich matter. These particles are extracted chemically from meteorites and were once interstellar particles. They have already been identified by their discoverers as supernova particles on the basis of their isotopic compositions, but we argue that they are from supernovae of Type Ia that explode with a cap of helium atop their CO structure. The relative abundances of the isotopes of C and Si and trace N, Mg, and Ca match those in the X particles without need of complicated and arbitrary mixing postulates. Furthermore, both C and Si abundances are enhanced and more abundant than O, which suggests that SiC is in fact the natural condensate of such matter. We also briefly address special issues relevant to the growth of dust within Type Ia interiors during their expansions. C1 UNIV ARIZONA, STEWARD OBSERV, TUCSON, AZ 85721 USA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. CLEMSON UNIV, DEPT PHYS & ASTRON, CLEMSON, SC 29634 USA. RP Clayton, DD (reprint author), CLEMSON UNIV, DEPT PHYS & ASTRON, CLEMSON, SC 29634 USA. NR 33 TC 46 Z9 46 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 10 PY 1997 VL 486 IS 2 BP 824 EP 834 DI 10.1086/304545 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA XX173 UT WOS:A1997XX17300019 ER PT J AU Rabinovich, D Chamberlin, RM Scott, BL Nielsen, JB Abney, KD AF Rabinovich, D Chamberlin, RM Scott, BL Nielsen, JB Abney, KD TI Synthesis of [Li(THF)(4)](2)[Th(eta(5)-C2B9H11)(2)X-2] (X=Cl, Br, I): The first dicarbollide complexes of thorium SO INORGANIC CHEMISTRY LA English DT Article ID METAL-COMPLEXES; CHEMISTRY; URANIUM; LIGANDS AB The first thorium complexes incorporating dicarbollide ligands, [Li(THF)(4)](2)[Th(eta(5)-C2B9H11)(2)X-2] (X=Cl, Br, I) and [Li(THF)(4)][Th(eta(5)-C2B9H11)Br-3(THF)], have been prepared and characterized by a combination of spectroscopic and analytical techniques, The molecular structure of the dibromo derivative has been determined by single-crystal X-ray diffraction. [Li(THF)(4)](2)[Th(eta(5)-C2B9H11)(2)Br-2] is monoclinic, Cc (No, 9), a=26.303 (2) Angstrom, b=11.143 (2) Angstrom, c=20.054 (2) Angstrom, beta=103.263 (7)degrees, Z=4. RP Rabinovich, D (reprint author), LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,CST-11,MAIL STOP 1514,LOS ALAMOS,NM 87545, USA. RI Chamberlin, Rebecca/A-1335-2011; Scott, Brian/D-8995-2017 OI Chamberlin, Rebecca/0000-0001-6468-7778; Scott, Brian/0000-0003-0468-5396 NR 23 TC 13 Z9 13 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD SEP 10 PY 1997 VL 36 IS 19 BP 4216 EP 4217 DI 10.1021/ic970198x PG 2 WC Chemistry, Inorganic & Nuclear SC Chemistry GA XV964 UT WOS:A1997XV96400011 ER PT J AU Schlueter, JA Geiser, U Wang, HH VanZile, ML Fox, SB Williams, JM Laguna, A Laguna, M Naumann, D Roy, T AF Schlueter, JA Geiser, U Wang, HH VanZile, ML Fox, SB Williams, JM Laguna, A Laguna, M Naumann, D Roy, T TI Electrochemical synthesis and crystallization of a novel tetraarylaurate anion: Synthesis, structure, and physical properties of (BEDT-TTF)Au(C6Cl5)(4) SO INORGANIC CHEMISTRY LA English DT Article ID ELECTRON-DONOR MOLECULE; BEDT-TTF; ORGANIC SUPERCONDUCTORS; GOLD(III) COMPLEXES; RADICAL SALT; BIS(ETHYLENEDITHIO)TETRATHIAFULVALENE AB The homoleptic tetraarylaurate anion, Au(C6Cl5)(4)(-), which has never been prepared via traditional chemical methods, has been synthesized by use of an electrochemical technique and crystallized in situ with the bis(ethylenedithio)tetrathiafulvalene tetrathiafulvalene (BEDT-TTF, or ET) electron-donor molecule. This salt, (C10H8S8)Au(C6Cl5)(4), crystallizes having the monoclinic space group P2(1)/c, with a = 14.7835(9) Angstrom, b = 20.2270(12) Angstrom, c = 16.7303(10) Angstrom, beta = 101.396(1)degrees, Z = 4. The crystal structure of this (ET)Au(C6Cl5)(4) salt contains the Au(C6Cl5)(4)(-) anion in an essentially square-planar coordination with the pentachlorophenyl groups arranged in a propeller-like D-4 symmetry, consistent with the formal oxidation state +3 of the central metal atom. The ET+ cations are completely surrounded by the pentachlorophenyl rings of the anions, thereby precluding the formation of a S...S network with concomitant conducting properties. Analysis of the Raman spectrum of (ET)Au(C6Cl5)(4) confirms that the ET molecule in this salt is in the fl oxidation state. The variable temperature spin susceptibility data obtained from ESR spectroscopy indicate a weak ferromagnetic coupling between the radical ET+ cations. This salt provides the unique opportunity to investigate the properties of a highly isolated ET+ cation in the solid state. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. UNIV ZARAGOZA,E-50009 ZARAGOZA,SPAIN. UNIV COLOGNE,INST ANORGAN CHEM,D-50939 COLOGNE,GERMANY. RP Schlueter, JA (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 26 TC 5 Z9 5 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD SEP 10 PY 1997 VL 36 IS 19 BP 4265 EP 4269 DI 10.1021/ic970274w PG 5 WC Chemistry, Inorganic & Nuclear SC Chemistry GA XV964 UT WOS:A1997XV96400019 ER PT J AU Bodwin, GT Sinclair, DK Kim, S AF Bodwin, GT Sinclair, DK Kim, S TI Lattice calculation of quarkonium decay matrix elements SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article; Proceedings Paper CT UIC Quarkonium Physics Workshop CY JUN 13-15, 1996 CL UNIV ILLINOIS CHICAGO, CHICAGO, IL HO UNIV ILLINOIS CHICAGO ID QCD; SPECTROSCOPY; CHARMONIUM AB We calculate the NRQCD matrix elements for the decays of the lowest-lying S-and P-wave states of charmonium and bottomonium in quenched lattice QCD. We also compute the one-loop relations between the lattice and continuum matrix elements. C1 SEOUL NATL UNIV, CTR THEORET PHYS, SEOUL, SOUTH KOREA. RP ARGONNE NATL LAB, HEP DIV, 9700 S CASS AVE, ARGONNE, IL 60517 USA. NR 22 TC 19 Z9 19 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X EI 1793-656X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD SEP 10 PY 1997 VL 12 IS 22 BP 4019 EP 4028 DI 10.1142/S0217751X97002176 PG 10 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA XV615 UT WOS:A1997XV61500023 ER PT J AU Brodsky, SJ AF Brodsky, SJ TI Novel QCD effects in the production and decay of quarkonium SO INTERNATIONAL JOURNAL OF MODERN PHYSICS A LA English DT Article; Proceedings Paper CT UIC Quarkonium Physics Workshop CY JUN 13-15, 1996 CL UNIV ILLINOIS CHICAGO, CHICAGO, IL HO UNIV ILLINOIS CHICAGO ID PROTON-PROTON INTERACTIONS; YAN CROSS-SECTION; PI-P-INTERACTIONS; LUND MONTE-CARLO; QUANTUM CHROMODYNAMICS; CHARM PRODUCTION; INTRINSIC CHARM; LAMBDA-C+; ANGULAR-DISTRIBUTIONS; HADRONIC SCATTERING AB There are many outstanding discrepancies comparing the predictions of perturbative QCD and measurements of the rate of production and decay of heavy quark systems. The problems include the J/psi --> rho pi puzzle, leading charmed particle effects, the anomalous behavior of the heavy quark sea components of structure functions, anomalous nuclear target effects, and the large rates observed for single and double quarkonium production at large x(F) and large p(T). I argue that these anomalies may be associated with nonperturbative effects in the higher Pock structure of hadron wavefunctions. RP STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94305 USA. NR 78 TC 3 Z9 3 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0217-751X EI 1793-656X J9 INT J MOD PHYS A JI Int. J. Mod. Phys. A PD SEP 10 PY 1997 VL 12 IS 22 BP 4087 EP 4098 DI 10.1142/S0217751X97002243 PG 12 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA XV615 UT WOS:A1997XV61500030 ER PT J AU Hummer, G Pratt, LR Garcia, AE AF Hummer, G Pratt, LR Garcia, AE TI Multistate Gaussian model for electrostatic solvation free energies SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID EXPLICIT SOLVENT CALCULATION; ENTROPY THEORY; MOLECULAR-DYNAMICS; WATER; LIQUID; HYDRATION; PROTEINS; SIMULATION; PREDICTION; LYSOZYME AB We develop and test a multistate Gaussian model for the distribution of electrostatic solvation energies of a solute in liquid water. The multistate Gaussian model depends on the discovery of simple indicators of structural substates that individually display Gaussian fluctuations of electrostatic interactions. The probability distribution of electrostatic interactions is then modeled as a superposition of Gaussian distributions of electrostatic interactions of the substates. We find that the number of hydrogen bonds to the solute is a suitable substate indicator that eliminates the chief failures of single Gaussian models for the distribution of electrostatic interactions and of quadratic models of the electrostatic contribution to the excess chemical potential. These results should improve calculations of ionic chemical processes in water, i.e., acid-base chemistry, in particular those involving organic acids such as proteins and nucleic acids. The multistate Gaussian approach provides a specific and effective alternative to commonly discussed electrostriction and dielectric saturation modifications of dielectric continuum models. Moreover, the representation of complex energy distributions by a sum of simpler distributions based on structural substates is general and should be applicable in a variety of thermodynamic problems of solution chemistry. RP Hummer, G (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,MS K710,LOS ALAMOS,NM 87545, USA. RI Pratt, Lawrence/H-7955-2012; Hummer, Gerhard/A-2546-2013 OI Pratt, Lawrence/0000-0003-2351-7451; Hummer, Gerhard/0000-0001-7768-746X NR 39 TC 65 Z9 65 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD SEP 10 PY 1997 VL 119 IS 36 BP 8523 EP 8527 DI 10.1021/ja971148u PG 5 WC Chemistry, Multidisciplinary SC Chemistry GA XV700 UT WOS:A1997XV70000015 ER PT J AU DuBois, JL Mukherjee, P Collier, AM Mayer, JM Solomon, EI Hedman, B Stack, TDP Hodgson, KO AF DuBois, JL Mukherjee, P Collier, AM Mayer, JM Solomon, EI Hedman, B Stack, TDP Hodgson, KO TI Cu K-edge XAS study of the [Cu-2(mu-O)(2)] core: Direct experimental evidence for the presence of Cu(III) SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID DIOXYGEN-BINDING; COPPER; COMPLEX; SITE; CHEMISTRY; OXIDASE; OXYGEN; INTERMEDIATE; HEMOCYANIN C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. UNIV WASHINGTON,DEPT CHEM,SEATTLE,WA 98195. STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305. NR 29 TC 82 Z9 82 U1 0 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD SEP 10 PY 1997 VL 119 IS 36 BP 8578 EP 8579 DI 10.1021/ja9717673 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XV700 UT WOS:A1997XV70000028 ER PT J AU Walter, KC Kung, HH Maggiore, CJ AF Walter, KC Kung, HH Maggiore, CJ TI Improved field emission of electrons from ion irradiated carbon SO APPLIED PHYSICS LETTERS LA English DT Article ID DIAMOND; FILMS; EMITTER AB Electron field emission from allotropes of carbon (graphite, diamondlike carbon, and diamond) have been reported many times in the literature. This work explores the use of ion irradiation for improving electron field emission from carbon fibers. Carbon fibers have been irradiated with H, C, Ar, and Xe ions. Field emission characteristics have been measured as a function of ion dose. A reversible reduction in the required field for a fixed current level has been observed. The critical dose, D-c, defines the dose corresponding to the lowest field necessary to emit a fixed current (5 mu A). The critical dose appears to correlate with the nuclear energy loss (collisions with atoms) of the ion in the carbon fiber. Transmission electron microscopy and parallel electron energy loss spectroscopy analysis indicate an amorphous surface, and an increase in the sp(3) content of the fiber surface to 20%-30%. A corresponding decrease in the work function is expected and may account for the improvement in electron emission. (C) 1997 American Institute of Physics. RP LOS ALAMOS NATL LAB, POB 1663, LOS ALAMOS, NM 87545 USA. NR 22 TC 24 Z9 24 U1 0 U2 2 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 SEP 8 PY 1997 VL 71 IS 10 BP 1320 EP 1322 DI 10.1063/1.119883 PG 3 WC Physics, Applied SC Physics GA XU889 UT WOS:A1997XU88900013 ER PT J AU Cooke, DW Bennett, BL Muenchausen, RE Wayne, DM AF Cooke, DW Bennett, BL Muenchausen, RE Wayne, DM TI Pyroelectrically induced optical emission from potassium titanyl phosphate crystals SO APPLIED PHYSICS LETTERS LA English DT Article ID KTIOPO4; LUMINESCENCE AB We have observed optical scintillations and corresponding electric current pulses when uniformly heating potassium titanyl phosphate (KTP) crystals at 0.1-0.4 Ws over the temperature range 8-300 K. The scintillations correspond to molecular nitrogen emission occurring during the electrical breakdown of air near the crystal surface, and imply the existence of pyroelectrically induced peak electric fields at the crystal surface exceeding 30 kV/cm, which is ten times larger than de electric fields reported to induce electrochromic (EC) damage in this material. Recent optical damage studies on KTP under high repetition rate, high average-power laser irradiation reveal an EC-like damage, implying the existence of an internal electric field arising during laser irradiation. Our observation of a sizable total pyroelectric response suggests one possible mechanism for the origin of these internal fields in KTP and other nonlinear optical materials. (C) 1997 American Institute of Physics. RP Cooke, DW (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 16 TC 5 Z9 5 U1 2 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 8 PY 1997 VL 71 IS 10 BP 1338 EP 1340 DI 10.1063/1.119887 PG 3 WC Physics, Applied SC Physics GA XU889 UT WOS:A1997XU88900019 ER PT J AU Lee, JU Guptasarma, P Hornbaker, D ElKortas, A Hinks, D Gray, KE AF Lee, JU Guptasarma, P Hornbaker, D ElKortas, A Hinks, D Gray, KE TI Observation of coherent modes of Josephson vortices in Bi2Sr2CaCu2Ox SO APPLIED PHYSICS LETTERS LA English DT Article ID SINGLE-CRYSTALS; SUPERCONDUCTORS; JUNCTIONS AB We report strong evidence for coherent modes of moving Josephson vortices in mesas patterned on the surface of Bi2Sr2CaCu2Ox single crystals. The vortex How current-voltage curves are characterized by a sharp up-turn and the appearance of multiple branches as the current is ramped up and down at a fixed magnetic field and temperature. These results are consistent with weakly damped motion of Josephson vortices in which different coherent modes can occur in a close stack of Josephson coupled multilayers. (C) 1997 American Institute of Physics. C1 ARGONNE NATL LAB,DIV SCI MAT,ARGONNE,IL 60439. RP Lee, JU (reprint author), ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 21 TC 49 Z9 49 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD SEP 8 PY 1997 VL 71 IS 10 BP 1412 EP 1414 DI 10.1063/1.119909 PG 3 WC Physics, Applied SC Physics GA XU889 UT WOS:A1997XU88900044 ER PT J AU Riistama, S Hummer, G Puustinen, A Dyer, RB Woodruff, WH Wikstrom, M AF Riistama, S Hummer, G Puustinen, A Dyer, RB Woodruff, WH Wikstrom, M TI Bound water in the proton translocation mechanism of the haem-copper oxidases SO FEBS LETTERS LA English DT Article DE proton translocation mechanism; haem-copper oxidase ID CYTOCHROME-C-OXIDASE; SITE-DIRECTED MUTAGENESIS; BO UBIQUINOL OXIDASE; ESCHERICHIA-COLI; 2.8 ANGSTROM; SUBUNIT-I; HEME; COMPLEX; BO(3) AB We address the molecular mechanism by which the haem-copper oxidases translocate protons, Reduction of O-2 to water takes place at a haem iron-copper (CUB) centre, and protons enter from one side of the membrane through a 'channel' structure in the enzyme, Statistical-mechanical calculations predict bound mater molecules within this channel, and mutagenesis experiments show that breaking this mater structure impedes proton translocation, Hydrogen-bonded mater molecules connect the channel further via a conserved glutamic acid residue to a histidine ligand of Cu-B, The glutamic acid side chain may have to move during proton transfer because proton translocation is abolished if it is forced to interact with a nearby lysine or arginine, Perturbing the CUB ligand structure shifts an infrared mode that may be ascribed to the O-H stretch of bound water, This is sensitive to mutations of the glutamic acid, supporting its connectivity to the histidine, These results suggest key roles of bound mater, the glutamic acid and the histidine copper ligand in the mechanism of proton translocation. (C) 1997 Federation of European Biochemical Societies. C1 UNIV HELSINKI,HELSINKI BIOENERGET GRP,DEPT MED CHEM,INST BIOMED SCI,FI-00014 HELSINKI,FINLAND. UNIV HELSINKI,BIOCENTRUM HELSINKI,FI-00014 HELSINKI,FINLAND. LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,THEORET BIOL & BIOPHYS GRP,LOS ALAMOS,NM 87545. RI Wikstrom, Marten/A-4403-2008; Hummer, Gerhard/A-2546-2013 OI Hummer, Gerhard/0000-0001-7768-746X NR 23 TC 125 Z9 126 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD SEP 8 PY 1997 VL 414 IS 2 BP 275 EP 280 DI 10.1016/S0014-5793(97)01003-X PG 6 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA XW759 UT WOS:A1997XW75900021 PM 9315701 ER PT J AU Chi, YI Yokota, H Kim, SH AF Chi, YI Yokota, H Kim, SH TI Apo structure of the ligand-binding domain of aspartate receptor from Escherichia coli and its comparison with ligand-bound or pseudoligand-bound structures SO FEBS LETTERS LA English DT Article DE aspartate receptor; transmembrane signaling; chemotaxis; X-ray crystallography; crystal structure ID SINGLE CYTOPLASMIC DOMAIN; DISULFIDE CROSS-LINKING; BACTERIAL CHEMOTAXIS; 3-DIMENSIONAL STRUCTURE; SALMONELLA-TYPHIMURIUM; CONFORMATIONAL-CHANGES; CRYSTAL-STRUCTURE; TRP REPRESSOR; CHEMORECEPTOR; DIMER AB The aspartate receptor from E. coli is a dimeric transmembrane-signaling protein that mediates chemotaxis behavior and is the most studied system among the chemotaxis receptors to understand the molecular mechanism for transmembrane signaling, However, there is an unresolved issue for the structural event which initiates the transmembrane signal upon binding to the ligand, Biochemical and genetic evidence implies an intrasubunit mechanism (monomeric model),whereas crystallographic evidence implies an intersubunit mechanism (dimeric model), Crystallographic evidence has been ambiguous because all the apo protein structures contained a pseudoligand sulfate, and a completely ligand-free structure has not been available thus far, Here we present the crystal structure of the ligand binding domain of the aspartate receptor free of the ligand aspartate or pseudoligand sulfate, The structural comparison of this structure with those of ligand-bound and pseudoligand-bound forms revealed that, on ligand or pseudoligand binding, the conformational change in the ligand-binding domain is relatively small, but there is a considerable rotation between two subunits, supporting the dimeric model. (C) 1997 Federation of European Biochemical Societies. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 29 TC 30 Z9 31 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD SEP 8 PY 1997 VL 414 IS 2 BP 327 EP 332 DI 10.1016/S0014-5793(97)01027-2 PG 6 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA XW759 UT WOS:A1997XW75900032 PM 9315712 ER PT J AU Caston, JR Trus, BL Booy, FP Wickner, RB Wall, JS Steven, AC AF Caston, JR Trus, BL Booy, FP Wickner, RB Wall, JS Steven, AC TI Structure of L-A virus: A specialized compartment for the transcription and replication of double-stranded RNA SO JOURNAL OF CELL BIOLOGY LA English DT Article ID HERPES-SIMPLEX VIRUS; CRYO-ELECTRON-MICROSCOPY; POL FUSION PROTEIN; SACCHAROMYCES-CEREVISIAE; CRYOELECTRON MICROSCOPY; 3-DIMENSIONAL RECONSTRUCTION; BLUETONGUE VIRUS; SIMIAN VIRUS-40; CORE PARTICLE; CAPSIDS AB The genomes of double-stranded (ds)RNA viruses are never exposed to the cytoplasm but are confined to and replicated from a specialized protein-bound compartment-the viral capsid, We have used cryoelectron microscopy and three-dimensional image reconstruction to study this compartment in the case of L-A, a yeast virus whose capsid consists of 60 asymmetric dimers of Gag protein (76 kD). At 16-Angstrom resolution, we distinguish multiple domains in the elongated Gag subunits, whose nonequivalent packing is reflected in subtly different morphologies of the two protomers. Small holes, 10-15 Angstrom across, perforate the capsid wall, which functions as a molecular sieve, allowing the exit of transcripts and the influx of metabolites, while retaining dsRNA and excluding degradative enzymes. Scanning transmission electron microscope measurements of mass-per-unit length suggest that L-A RNA is an A-form duplex, and that RNA filaments emanating from disrupted virions often consist of two or more closely associated duplexes. Nuclease protection experiments confirm that the genome is entirely sequestered inside full capsids, but it is packed relatively loosely; in L-A, the center-to-center spacing between duplexes is 40-45 Angstrom, compared with 25-30 Angstrom in other double-stranded viruses. The looser packing of L-A RNA allows for maneuverability in the crowded capsid interior, in which the genome (in both replication and transcription) must be translocated sequentially past the polymerase immobilized on the inner capsid wall. C1 NIAMSD,STRUCT BIOL LAB,NIH,BETHESDA,MD 20892. NIDDKD,COMPUTAT BIOSCI & ENGN LAB,DIV COMP RES & TECHNOL,NIH,BETHESDA,MD 20892. NIDDKD,LAB BIOCHEM & GENET,NIH,BETHESDA,MD 20892. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. RI Caston, Jose/L-5896-2014 OI Caston, Jose/0000-0003-2350-9048 NR 58 TC 78 Z9 81 U1 0 U2 3 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0021-9525 J9 J CELL BIOL JI J. Cell Biol. PD SEP 8 PY 1997 VL 138 IS 5 BP 975 EP 985 DI 10.1083/jcb.138.5.975 PG 11 WC Cell Biology SC Cell Biology GA XW463 UT WOS:A1997XW46300004 PM 9281577 ER PT J AU Tillman, PA Rottach, DR McCoy, JD Plimpton, SJ Curro, JG AF Tillman, PA Rottach, DR McCoy, JD Plimpton, SJ Curro, JG TI The effect of attractions on the structure and thermodynamics of model polymer blends SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID INTEGRAL-EQUATION THEORY; MOLECULAR-DYNAMICS SIMULATION; MONTE-CARLO SIMULATIONS; REPULSIVE FORCES; FLUIDS; MELTS; LIQUIDS; STATE AB Molecular dynamics (MD) simulations were carried out on a blend of 50 unit, pearl-necklace chains with the object of examining-the effect of intermolecular attractions on the blend structure and thermodynamics, Repulsive interactions were imposed between intermolecular sites so that the effective hard core diameter of B type chains was 1.2 times that of the A type chains. Simulations were performed for a series of runs in which the attractive interactions were systematically varied from zero to the full Lennard-Jones value. Examination of the radial distribution functions revealed that the attractive interactions had very little effect on the blend structure up to the point of phase separation. Furthermore, we found that perturbation theory accurately predicted the changes in pressure associated with the variations in the attractive strengths. (C) 1997 American Institute of Physics. C1 NEW MEXICO INST MIN & TECHNOL, DEPT MAT & MET ENGN, SOCORRO, NM 87801 USA. SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. RI McCoy, John/B-3846-2010; Rottach, Dana/E-8350-2010 OI McCoy, John/0000-0001-5404-1404; Rottach, Dana/0000-0003-0459-5980 NR 34 TC 9 Z9 9 U1 0 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 SEP 8 PY 1997 VL 107 IS 10 BP 4024 EP 4032 DI 10.1063/1.474758 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA XV756 UT WOS:A1997XV75600032 ER PT J AU Hori, K Oz, Y AF Hori, K Oz, Y TI F-theory, T-duality on K3 surfaces, and N=2 supersymmetric gauge theories in four dimensions SO NUCLEAR PHYSICS B LA English DT Article ID INSTANTONS; SHEAVES AB We construct T-duality on K3 surfaces, The T-duality exchanges a 4-brane RR chare and a O-brane RR charge, We study the action of the T-duality on the moduli space of O-branes located at points of K3 and 4-branes wrapping it, We apply the construction to F-theory compactified on a Calabi-Yau 4-fold and study the duality of N = 2 SU(N-c) gauge theories in four dimensions. We discuss the generalization to the N = 1 duality scenario. (C) 1997 Elsevier Science B.V. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP Hori, K (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,366 LE CONTE HALL,BERKELEY,CA 94720, USA. NR 31 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 8 PY 1997 VL 501 IS 1 BP 97 EP 108 DI 10.1016/S0550-3213(97)00361-1 PG 12 WC Physics, Particles & Fields SC Physics GA XY720 UT WOS:A1997XY72000005 ER PT J AU Gordon, LE AF Gordon, LE TI Isolated photons at hadron colliders at O(alpha alpha(s)(2)) .1. Spin-averaged case SO NUCLEAR PHYSICS B LA English DT Article DE prompt photons; QCD; isolation; spin; polarized; unpolarized ID HIGHER-ORDER CORRECTIONS; TO-LEADING-ORDER; = 1.8 TEV; CROSS-SECTION; PARTON DISTRIBUTIONS; GLOBAL QCD; PROMPT; COLLISIONS; JETS; GLUON AB The cross sections for isolated and non-isolated prompt photon production with unpolarized hadron beams are studied at order alpha alpha(s)(2). Two methods of performing the calculations are compared, One uses purely analytic techniques and the second uses a combination of analytic and Monte Carlo techniques to perform the phase-space integrations. The results of the analytic and Monte Carlo methods are compared both before and after isolation cuts are placed on the photon. Fragmentation contributions are included at next-to-leading order in the analytic case, and the question of the infrared sensitivity of this contribution once isolation is implemented is addressed, Numerical results are presented and compared with the latest CDF data for p (p) over bar --> gamma + X using the latest parton densities for the proton. (C) 1997 Elsevier Science B.V. RP Gordon, LE (reprint author), ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439, USA. NR 29 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 8 PY 1997 VL 501 IS 1 BP 175 EP 196 DI 10.1016/S0550-3213(97)00339-8 PG 22 WC Physics, Particles & Fields SC Physics GA XY720 UT WOS:A1997XY72000009 ER PT J AU Gordon, LE AF Gordon, LE TI Isolated photons at hadron colliders at O(alpha alpha(s)(2)) .2. Spin-dependent case SO NUCLEAR PHYSICS B LA English DT Article DE prompt photons; QCD; isolation; spin; polarized; unpolarized ID TO-LEADING-ORDER; SPLITTING FUNCTIONS; GLUON POLARIZATION; PROTON; SCATTERING; NUCLEON; TARGET; COLLISIONS; ASYMMETRY; DEUTERON AB The cross section for inclusive prompt photon production with polarized hadron beams is calculated at order alpha alpha(s)(2) using the phase-space slicing or analytic/Monte Carlo method. Isolation cuts are placed on the photon and the results are compared to a previous fully analytic calculation. Numerical results for the isolated cross section are presented for (p) over right arrow (p) over right arrow --> gamma + X at RHIC centre-of-mass energies with plausible isolation parameters using the most modem polarized parton densities evolved in next-to-leading order QCD. The perturbative stability of the asymmetries and scale dependence of the results are briefly discussed. (C) 1997 Elsevier Science B.V. RP Gordon, LE (reprint author), ARGONNE NATL LAB,DIV HIGH ENERGY PHYS,ARGONNE,IL 60439, USA. NR 35 TC 8 Z9 8 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD SEP 8 PY 1997 VL 501 IS 1 BP 197 EP 206 DI 10.1016/S0550-3213(97)00340-4 PG 10 WC Physics, Particles & Fields SC Physics GA XY720 UT WOS:A1997XY72000010 ER PT J AU Cleveland, CL Landman, U Schaaff, TG Shafigullin, MN Stephens, PW Whetten, RL AF Cleveland, CL Landman, U Schaaff, TG Shafigullin, MN Stephens, PW Whetten, RL TI Structural evolution of smaller gold nanocrystals: The truncated decahedral motif SO PHYSICAL REVIEW LETTERS LA English DT Article ID CLUSTERS; PARTICLES; DIFFRACTION; ENERGETICS AB Atomistic modeling of energetics and structures, coupled with x-ray powder diffraction analyses of size-separated passivated gold nanocrystals in the 1-2 nm size range, shows preferential formation of a stable sequence of three cluster sizes, all with a truncated-decahedral motif. C1 GEORGIA INST TECHNOL,SCH CHEM,ATLANTA,GA 30332. SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE DEPT,UPTON,NY 11973. RP Cleveland, CL (reprint author), GEORGIA INST TECHNOL,SCH PHYS,ATLANTA,GA 30322, USA. NR 29 TC 395 Z9 401 U1 0 U2 47 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 SEP 8 PY 1997 VL 79 IS 10 BP 1873 EP 1876 DI 10.1103/PhysRevLett.79.1873 PG 4 WC Physics, Multidisciplinary SC Physics GA XV012 UT WOS:A1997XV01200023 ER PT J AU de Melo, CARS AF de Melo, CARS TI Magnetic exchange coupling in ferromagnet/superconductor/ferromagnet multilayers SO PHYSICAL REVIEW LETTERS LA English DT Article ID FE LAYERS; OSCILLATION; FE/CR/FE(100); TEMPERATURE; NB AB The possibility of magnetic exchange coupling between two ferromagnets (F) separated by a superconductor (S) spacer is analyzed using the functional integral method. For this coupling to happen three basic conditions need to be satisfied. First, an indirect exchange coupling between the ferromagnets must exist when the superconductor is in its normal state. Second, superconductivity must not be destroyed due to the proximity to ferromagnetic boundaries. Third, roughness of the FIS interfaces must be small. The appearance of the superconducting gap causes a reduction of the indirect exchange coupling existent in the normal state. This reduction is temperature dependent, being weaker near the critical temperature and stronger at zero temperature. RP de Melo, CARS (reprint author), ARGONNE NATL LAB, DIV MAT SCI, 9700 S CASS AVE, ARGONNE, IL 60439 USA. NR 28 TC 80 Z9 80 U1 1 U2 4 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 SEP 8 PY 1997 VL 79 IS 10 BP 1933 EP 1936 DI 10.1103/PhysRevLett.79.1933 PG 4 WC Physics, Multidisciplinary SC Physics GA XV012 UT WOS:A1997XV01200038 ER PT J AU Milton, GW Berryman, JG AF Milton, GW Berryman, JG TI On the effective viscoelastic moduli of two-phase media .2. Rigorous bounds on the complex shear modulus in three dimensions SO PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES LA English DT Article ID 2-COMPONENT COMPOSITE-MATERIAL; DIELECTRIC-CONSTANT; BULK MODULUS; HOMOGENIZATION; SCHEME AB Cherkaev-Gibiansky and Hashin-Shtrikman variational principles are used in order to obtain rigorous bounds on the shear modulus of two-phase viscoelastic composites in three dimensions. The simplest class of bounding regions is composed of circles in the complex plane containing four points related to the viscoelastic moduli of the constituents. By taking the intersection of all such circles, we obtain tight bounds on the complex shear modulus. A compact algorithm for computing this region of intersection is formulated and tested. Several examples of bounding sets computed using the method are presented. When the phases have equal and real Poisson's ratio, the bounding set reduces to a simple lens-shaped region in the complex shear modulus plane. A mixture of two viscous fluids and a suspension of solid particles in a viscous fluid provide physical motivations for two other examples of bounds that have been computed. In the important limiting case when all the constituent moduli are real, the new shear modulus bounds are shown to reduce precisely to the well-known Hashin-Shtrikman-Walpole bounds. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. RP Milton, GW (reprint author), UNIV UTAH, DEPT MATH, SALT LAKE CITY, UT 84112 USA. RI Berryman, James/A-9712-2008 NR 38 TC 21 Z9 21 U1 1 U2 3 PU ROYAL SOC PI LONDON PA 6-9 CARLTON HOUSE TERRACE, LONDON SW1Y 5AG, ENGLAND SN 1364-5021 EI 1471-2946 J9 P ROY SOC A-MATH PHY JI Proc. R. Soc. A-Math. Phys. Eng. Sci. PD SEP 8 PY 1997 VL 453 IS 1964 BP 1849 EP 1880 PG 32 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA XW067 UT WOS:A1997XW06700004 ER PT J AU Dasaradhi, L Lambert, T Stark, P Huber, V Jarvinen, G Gopalan, A AF Dasaradhi, L Lambert, T Stark, P Huber, V Jarvinen, G Gopalan, A TI Synthesis and evaluations of some new calixarene chelators for extraction of actinide ions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003. LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 1 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701869 ER PT J AU Guettler, RD Lyman, JL Jensen, RJ AF Guettler, RD Lyman, JL Jensen, RJ TI Absorption spectrum of high-temperature carbon dioxide in the solar region. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 1 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900519 ER PT J AU McCarthy, JF AF McCarthy, JF TI Colloids in ground water: Composition and significance. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 1 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701488 ER PT J AU Randrup, J Berkeley, L AF Randrup, J Berkeley, L TI Multifragmentation and DCC's: Parallels and contrasts SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 1 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702733 ER PT J AU Haverlock, TJ Bonnesen, PV Sachleben, RA Moyer, BA AF Haverlock, TJ Bonnesen, PV Sachleben, RA Moyer, BA TI Cs/K selectivity of a lipophilic calix[4]arene-crown-6 extractant in liquid-liquid separations from nitrate media. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 2 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701870 ER PT J AU Robbins, EI AF Robbins, EI TI Hands on AMD: Science experiments for children living where creeks are red and yellow. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US GEOL SURVEY,NATL CTR,RESTON,VA 20192. US DOE,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 4 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700553 ER PT J AU Chambliss, CK Odom, MA Morales, CM Moyer, BA Martin, CR Strauss, SH AF Chambliss, CK Odom, MA Morales, CM Moyer, BA Martin, CR Strauss, SH TI Redox-recyclable anion-exchange materials containing physisorbed redox-active, organometallic complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. COLORADO STATE UNIV,DEPT CHEM,FT COLLINS,CO 80523. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 5 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701873 ER PT J AU Beardmore, KM GronbechJensen, N Kress, JD Parikh, AN AF Beardmore, KM GronbechJensen, N Kress, JD Parikh, AN TI Molecular dynamics simulation of self-assembled monolayers with defects. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. RI PARIKH, ATUL/D-2243-2014 OI PARIKH, ATUL/0000-0002-5927-4968 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 6 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901737 ER PT J AU Elam, CC Evans, RJ Czernik, S AF Elam, CC Evans, RJ Czernik, S TI An integrated approach to the recovery of fuels and chemicals from mixed waste carpets through thermocatalytic processing. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 6 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701689 ER PT J AU Fryberger, T AF Fryberger, T TI Basic research: What role can it play in the DOE weapons complex cleanup. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 6 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702738 ER PT J AU Stoner, DL Larsen, ED Miller, KS Fife, DJ Johnson, JA AF Stoner, DL Larsen, ED Miller, KS Fife, DJ Johnson, JA TI A learning-based intelligent control system for mining bioprocesses SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO NATL ENGN & ENVIRONM LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 6 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701758 ER PT J AU Taylor, CE Anderson, RR DEste, JR Noceti, RP AF Taylor, CE Anderson, RR DEste, JR Noceti, RP TI Production of gasoline from natural gas. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 6 EP CATL PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901640 ER PT J AU Young, R Bast, C Davidson, K Forsyth, C Milanez, S Norris, J Ross, R Talmage, S Troxel, C Lu, PY AF Young, R Bast, C Davidson, K Forsyth, C Milanez, S Norris, J Ross, R Talmage, S Troxel, C Lu, PY TI Documentation and derivation of acute exposure guideline levels. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RI Bast, Cheryl/B-9436-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 7 EP CHAS PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700847 ER PT J AU Lackowski, WM Houston, JE Crooks, RM AF Lackowski, WM Houston, JE Crooks, RM TI Interfacial force microscopy studies of the mechanical properties of self-assembled alkanethiol monolayer films on AU(111). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 TEXAS A&M UNIV,DEPT CHEM,COLLEGE STN,TX 77843. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 8 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901739 ER PT J AU Nash, KL Jensen, MP Hines, JJ Schmidt, MA Friedrich, S AF Nash, KL Jensen, MP Hines, JJ Schmidt, MA Friedrich, S TI Phytate/phosphate for actinide sequestration in the subsurface SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 8 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702740 ER PT J AU Duff, MC Longmire, P Hunter, D Kung, S Mason, C Bertsch, P AF Duff, MC Longmire, P Hunter, D Kung, S Mason, C Bertsch, P TI The redox speciation of chromium in highly contaminated radioactive soils - The influence of organic matter. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 9 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702741 ER PT J AU Jamriska, DJ Taylor, WA Ott, MA Heaton, RC Phillips, DR Fowler, MM AF Jamriska, DJ Taylor, WA Ott, MA Heaton, RC Phillips, DR Fowler, MM TI Production of Cu-67 with low energy proton irradiation of enriched Zn-70 targets SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 9 EP TECH PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700942 ER PT J AU Brown, GE Foster, A Ostergren, J Bargar, JR AF Brown, GE Foster, A Ostergren, J Bargar, JR TI X-ray absorption spectroscopy and molecular environmental science SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 STANFORD UNIV,DEPT GEOG & ENVIRONM SCI,STANFORD,CA 94305. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 10 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701762 ER PT J AU Siemens, WD AF Siemens, WD TI Partnerships with the US chemical industry at Sandia SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 10 EP BMGT PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700464 ER PT J AU Camaioni, DM Knutsen, K Linehan, JC Orlando, TM Cook, A Meisel, D AF Camaioni, DM Knutsen, K Linehan, JC Orlando, TM Cook, A Meisel, D TI Some fundamental studies on the effects of radiation and interfaces in high level wastes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. ARGONNE NATL LAB, ARGONNE, IL 60439 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 11 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702743 ER PT J AU Stoner, DL Jolley, JG Wright, RB Miller, KS AF Stoner, DL Jolley, JG Wright, RB Miller, KS TI Modification of coal-derived materials by Rhodococcus species SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 11 EP FUEL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701694 ER PT J AU Toupadakis, AI Kubas, GJ King, WA Scott, BL AF Toupadakis, AI Kubas, GJ King, WA Scott, BL TI Synthesis and reaction of [Mn(CO)(3)(PCy3)(2)](+) with hydrogen and crystal structure of the MnBr(CO)(3)(PCy3)(2) precursor. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 11 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702032 ER PT J AU HuhmannVincent, J Kubas, GJ Scott, B AF HuhmannVincent, J Kubas, GJ Scott, B TI Cationic monophosphine Re complexes and their reactions with small molecules. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 12 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702033 ER PT J AU Williams, SB AF Williams, SB TI Stabilization of plutonium contaminated wet combustible residues. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 12 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701880 ER PT J AU Tuccinardi, T Hansen, D AF Tuccinardi, T Hansen, D TI Department of energy (DOE) applications for acute exposure guideline levels (AEGLs). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,GERMANTOWN,MD 20874. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 13 EP CHAS PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700853 ER PT J AU Ravel, B Ankudinov, A Rehr, JJ AF Ravel, B Ankudinov, A Rehr, JJ TI Calculation and interpretation of XANES in complex materials. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 14 EP GEOC PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701766 ER PT J AU Tam, CN Bour, P Trouw, FR AF Tam, CN Bour, P Trouw, FR TI A study of the intermolecular hydrogen bonding in simple amides by inelastic neutron scattering. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV INTENSE PULSED NEUTRON SOURCE,B360,ARGONNE,IL 60439. RI Bour, Petr/G-5561-2014 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 14 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900532 ER PT J AU Vairavamurthy, MA AF Vairavamurthy, MA TI Oxidation state: Limitations in applicability to complex molecules and an experimental approach by x-ray absorption spectroscopy. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 15 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701767 ER PT J AU Hakem, N AlMahamid, I Apps, J Moridis, G AF Hakem, N AlMahamid, I Apps, J Moridis, G TI Sorption behavior of cesium and strontium on Savannah River Site soils. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 16 EP NUCL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702748 ER PT J AU Palmer, PD Clark, DL Neu, MP Tait, CD Keogh, DW Conradson, SD Reilly, SD Newton, TW AF Palmer, PD Clark, DL Neu, MP Tait, CD Keogh, DW Conradson, SD Reilly, SD Newton, TW TI Spectroscopic and structural studies of plutonium (IV) carbonate complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 16 EP TECH PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700949 ER PT J AU Porter, MD Wang, JH Kenseth, JR Jones, VW AF Porter, MD Wang, JH Kenseth, JR Jones, VW TI Nanoscale in situ monitoring of surface-bound reactions using scanning force microscopy (SFM). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV,DEPT CHEM,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 16 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901747 ER PT J AU Blau, MS AF Blau, MS TI Levitation zone refining of plutonium metal, LAUR-97-1163. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 17 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702749 ER PT J AU Cisper, ME Hemberger, PH AF Cisper, ME Hemberger, PH TI Applications of ion trap mass spectrometry to environmental and complex samples. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 18 EP TECH PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700951 ER PT J AU Wang, LS Wu, HB AF Wang, LS Wu, HB TI Electronic structure of titanium oxide clusters: TiOX (X=1-3) and (TiO2)X (X=1-4). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 WASHINGTON STATE UNIV, DEPT PHYS, RICHLAND, WA 99352 USA. PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 18 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900536 ER PT J AU Bell, AT AF Bell, AT TI Mechanistic investigations of NO reduction by CH4 over ZSM-5 exchanged with transition metal cations. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 19 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900412 ER PT J AU Kelley, SS Elam, CC Evans, RJ Looker, MJ AF Kelley, SS Elam, CC Evans, RJ Looker, MJ TI Recovery of phenolic monomers from industrial novolac plastics. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,CTR RENEWABLE CHEM TECHNOL & MAT,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 19 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701702 ER PT J AU Nash, KL AF Nash, KL TI Aqueous complexes in f-element separation science: Why and where they're important, and ligand design for new options SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 20 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701888 ER PT J AU Lin, YY Pines, A AF Lin, YY Pines, A TI Spin dynamics in dipole-coupled molecular systems SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 22 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900540 ER PT J AU Smith, BF Robison, TW AF Smith, BF Robison, TW TI Water-soluble metal-binding polymers with ultrafiltration: A technology for removal, concentration, and recovery of metal ions from aqueous streams. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 22 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701890 ER PT J AU McCarthy, MR AF McCarthy, MR TI Synthesis and characterization of organometallic cerium (III) amido complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NO ARIZONA UNIV,DEPT CHEM,FLAGSTAFF,AZ 86022. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 23 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702043 ER PT J AU Rosentreter, JJ Hemming, C Smith, RW McLing, T AF Rosentreter, JJ Hemming, C Smith, RW McLing, T TI Uranium sorption onto natural sands as a function of solution and sediment characteristics. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO STATE UNIV,DEPT CHEM,POCATELLO,ID 83209. IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 23 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701510 ER PT J AU Swanson, BI Johnson, S Shi, J Yang, X AF Swanson, BI Johnson, S Shi, J Yang, X TI Chemical microsensors based on species selective self-assembled thin films. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 23 EP MTLS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901754 ER PT J AU Allen, PG Shuh, DK Bucher, JJ Edelstein, NM Reich, T AF Allen, PG Shuh, DK Bucher, JJ Edelstein, NM Reich, T TI An XAFS investigation of the formation of actinide aquo and chloro complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. ROSSENDORF INC,FORSCHUNGSZENTRUM ROSSENDORF EV,INST RADIOCHEM,D-01314 DRESDEN,GERMANY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 24 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702756 ER PT J AU Czerwinski, KR McCarthy, JF Sanford, WE Jardine, PM Marsh, JD AF Czerwinski, KR McCarthy, JF Sanford, WE Jardine, PM Marsh, JD TI Geochemical modeling of trivalent actinide ions and natural organic matter. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 MIT,DEPT NUCL ENGN,CAMBRIDGE,MA 02139. ORNL,DIV ENVIRONM SCI,OAK RIDGE,TN. COLORADO STATE UNIV,DEPT EARTH RESOURCES,FT COLLINS,CO 80523. RI Sanford, William/F-7380-2016 OI Sanford, William/0000-0001-9085-1367 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 25 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702757 ER PT J AU Mukkamala, R Bertozzi, CR AF Mukkamala, R Bertozzi, CR TI Novel azido-carbohydrates for photochemical fixation on polymer surfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 26 EP MACR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901699 ER PT J AU Rowland, B Hess, W AF Rowland, B Hess, W TI Polarization study of the UV photodissociation of acetyl chloride: Alignment of photoproducts in the condensed-phase. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 26 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900544 ER PT J AU Xia, YX Rao, LF Rai, D AF Xia, YX Rao, LF Rai, D TI Variation of stability constants of neptunium (IV) sulfate complexes as a function of ionic strength. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 26 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702758 ER PT J AU Zanonato, PL Rao, LF AF Zanonato, PL Rao, LF TI Complexation of Eu(III) by N,N',N'',N''' tetra-alkyldiamides. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 27 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702759 ER PT J AU Berg, JM Vaughn, RB Cisneros, MR AF Berg, JM Vaughn, RB Cisneros, MR TI Inner-sphere complexation and outer-sphere solvation effects in the intra-5f absorption spectra of plutonium (IV) in high ionic strength nitrate/chloride/perchlorate aqueous solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 28 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702760 ER PT J AU Schenter, GK McCarthy, MI Dixon, DA Campbell, L Rehr, JJ AF Schenter, GK McCarthy, MI Dixon, DA Campbell, L Rehr, JJ TI Prediction of EXAFS spectra from molecular interaction models: Aqueous Cr3+ SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. UNIV WASHINGTON, DEPT PHYS, SEATTLE, WA 98195 USA. RI Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 28 EP GEOC PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701780 ER PT J AU Gaffney, JS Marley, NA AF Gaffney, JS Marley, NA TI Measurements of PANs in Mexico city: Implications for hydrocarbon reactivity and heterogeneous chemistry. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV ENVIRONM RES,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 30 EP COLL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701052 ER PT J AU Seaman, JC Bertsch, PM AF Seaman, JC Bertsch, PM TI Automated SEM analysis of mobile groundwater colloids: Reducing instrument and operator bias. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,ADV ANALYT CTR ENVIRONM SCI,AIKEN,SC 29802. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 30 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701517 ER PT J AU Hay, BP AF Hay, BP TI A molecular mechanics method for predicting the influence of ligand structure on metal ion binding affinity SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 31 EP IEC PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701899 ER PT J AU King, WA Eckert, J Kubas, GJ AF King, WA Eckert, J Kubas, GJ TI The application of a gallium based low interacting anion to the study of cationic manganese dihydrogen complexes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 31 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702051 ER PT J AU McDonald, MA Gormley, RJ Zarochak, MF Deffenbach, PW AF McDonald, MA Gormley, RJ Zarochak, MF Deffenbach, PW TI Estimation of surface site density on iron Fischer-Tropsch catalysts by means of a test reaction. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. PARSONS POWER,PITTSBURGH ENERGY TECHNOL CTR,LIBRARY,PA 15129. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 32 EP CATL PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901666 ER PT J AU Sachleben, RA Moyer, BA AF Sachleben, RA Moyer, BA TI Ligand design for small cations: The Li+/14-crown-4 system SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 33 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701901 ER PT J AU Thorne, LR AF Thorne, LR TI An optimized strategy for rapidly balancing chemical equations SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 33 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700582 ER PT J AU Delegard, CH Elovich, RJ Barney, GS Peretrukhin, VF AF Delegard, CH Elovich, RJ Barney, GS Peretrukhin, VF TI Chemical factors affecting plutonium compound solubility in Hanford site radioactive tank wastes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. B&W HANFORD CO, RICHLAND, WA USA. RUSSIAN ACAD SCI, INST PHYS CHEM, MOSCOW 117915, RUSSIA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 36 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702768 ER PT J AU Soong, Y Gamwo, IK Blackwell, AG Harke, FW Schehl, RR Zarochak, MF AF Soong, Y Gamwo, IK Blackwell, AG Harke, FW Schehl, RR Zarochak, MF TI Ultrasonic measurement of catalysts concentration in an autoclave reactor at high temperature. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,FED ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 36 EP CATL PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901670 ER PT J AU King, CM Bryan, SA AF King, CM Bryan, SA TI Gas generation in Hanford tanks 241-S-102 and 241-SY-103. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 38 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702770 ER PT J AU Carpenter, JP Loy, DA Small, JH AF Carpenter, JP Loy, DA Small, JH TI The impact of monomer structure on the surface area and porosity of polysilsesquioxanes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ENCAPSULANTS & POROUS MAT DEPT,ALBUQUERQUE,NM 87185. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 39 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701061 ER PT J AU Felmy, AR Dixon, DA Campbell, JA Mason, MJ AF Felmy, AR Dixon, DA Campbell, JA Mason, MJ TI The effects of OH, CO3, and Ca on the displacement of Sr from the edta chelate: Implications for waste processing. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 39 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702771 ER PT J AU Camaioni, DM Samuels, WD Clauss, SA Linehan, JC Wahl, KL Sharma, AK Campbell, JA AF Camaioni, DM Samuels, WD Clauss, SA Linehan, JC Wahl, KL Sharma, AK Campbell, JA TI Fate of organic chemicals added to Hanford high level waste storage tanks. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99353 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 41 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702773 ER PT J AU Cugini, AV Ciocco, MV Hirsh, RV AF Cugini, AV Ciocco, MV Hirsh, RV TI Feed flow studies of waste coprocessing feed slurries. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PARSONS POWER GRP INC,LIBRARY,PA 15129. FED ENERGY TECHNOL CTR,PITTSBURGH,PA 15236. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 42 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701725 ER PT J AU Baxter, LL Nielsen, HP AF Baxter, LL Nielsen, HP TI The effects of fuel-bound chlorine and alkali on corrosion initiation. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550. NR 0 TC 2 Z9 2 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 44 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701727 ER PT J AU Bonnesen, PV Presley, DJ Haverlock, TJ Sachleben, RA Gakh, AA Moyer, BA AF Bonnesen, PV Presley, DJ Haverlock, TJ Sachleben, RA Gakh, AA Moyer, BA TI Investigating cooperativity between a calixarene-crown ether and its solvation environment on the extractability of cesium. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 44 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701912 ER PT J AU BelleOudry, DA Taylor, AM Dayton, DC AF BelleOudry, DA Taylor, AM Dayton, DC TI Analysis of combustion products from the co-firing of coal with biomass fuels. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 45 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701728 ER PT J AU Schlei, BR Strottman, D AF Schlei, BR Strottman, D TI Probing the equation of state of nuclear matter with relativistic hydrdynamics. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 45 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702777 ER PT J AU Wegrzyn, JE Mahajan, D Gurevich, M AF Wegrzyn, JE Mahajan, D Gurevich, M TI Catalytic routes to transportation fuels utilizing natural gas hydrates. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. US DOE,OFF HEAVY VEHICLES TECHNOL,WASHINGTON,DC 20585. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 45 EP PETR PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900438 ER PT J AU Mohs, TR Xu, J Raymond, KH AF Mohs, TR Xu, J Raymond, KH TI The design and synthesis of ligands for the separation and immobilization of actinide ions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,SEABORG INST TRANSACTINIUM SCI,LIVERMORE,CA 94550. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 46 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701914 ER PT J AU Moore, N AF Moore, N TI Reduction of energy and water usage through the US Department of Energy food processing agricultural program. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE, PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 46 EP AGFD PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700046 ER PT J AU Sturchio, NC Cheng, LW Lyman, P Bedzyk, MJ AF Sturchio, NC Cheng, LW Lyman, P Bedzyk, MJ TI Surface ion exchange on calcite observed with X-ray standing waves. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NORTHWESTERN UNIV,EVANSTON,IL 60208. RI Bedzyk, Michael/B-7503-2009; Cheng, Likwan/C-1436-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 46 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701798 ER PT J AU Xu, N AF Xu, N TI Two-particle correlation functions from ultrarelativistic heavy-ion collisions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 46 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702778 ER PT J AU Chen, Q Mukkamala, R Bertozzi, C AF Chen, Q Mukkamala, R Bertozzi, C TI Synthesis of acrylamide carbohydrate derivatives and characterization of their copolymers with 2-hydroxyethyl methacrylate. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 47 EP CARB PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700513 ER PT J AU Li, DQ Shi, XB Lee, YW AF Li, DQ Shi, XB Lee, YW TI Molecular and macromolecular multilayer self-assemblies as electronic and optical materials. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV CST4,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 47 EP MTLS PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901778 ER PT J AU Zavarin, M Doner, HE Foster, AL Brown, GE AF Zavarin, M Doner, HE Foster, AL Brown, GE TI Selenium interaction with calcite. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT ESPM,BERKELEY,CA 94720. STANFORD UNIV,DEPT GEOG & ENVIRONM SCI,STANFORD,CA 94305. STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 47 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701799 ER PT J AU Campbell, JA Sharma, A Mong, GM Clauss, S AF Campbell, JA Sharma, A Mong, GM Clauss, S TI Analysis of Hanford tank wastes using ion chromatography. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 50 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702782 ER PT J AU McCarthy, MI Schenter, GK Brown, GE Rehr, JJ AF McCarthy, MI Schenter, GK Brown, GE Rehr, JJ TI Simulating EXAFS spectra for metals at water mineral oxide interfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99353 USA. STANFORD UNIV, STANFORD, CA 94305 USA. UNIV WASHINGTON, SEATTLE, WA 98195 USA. RI Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 50 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701802 ER PT J AU Campbell, JA Mong, GM AF Campbell, JA Mong, GM TI Analysis of phosphate-related components in Hanford tank wastes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ADV ORGAN ANALYT METHODS GRP, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 51 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702783 ER PT J AU Hunt, JE Winans, RE Thiyagarajan, P AF Hunt, JE Winans, RE Thiyagarajan, P TI Laser desorption mass spectrometry and small angle neutron scattering of heavy fossil materials. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 51 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701734 ER PT J AU ODay, P Carroll, S Newville, M Fuller, C Villinski, J AF ODay, P Carroll, S Newville, M Fuller, C Villinski, J TI Techniques and applications of synchrotron XAS to metal bonding in contaminated sediments and soils. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARIZONA STATE UNIV,DEPT GEOL,TEMPE,AZ 85287. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. US GEOL SURVEY,MENLO PK,CA 94025. UNIV ARIZONA,TUCSON,AZ 85721. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 51 EP GEOC PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701803 ER PT J AU Ankudinov, A Conradson, S Rehr, JJ AF Ankudinov, A Conradson, S Rehr, JJ TI Self-consistent calculations of XANES in Pu hydrates. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,MST 11,LOS ALAMOS,NM 87545. UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 52 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701804 ER PT J AU Carrado, KA Thiyagarajan, P Winans, RE Song, K AF Carrado, KA Thiyagarajan, P Winans, RE Song, K TI Anomalous small angle x-ray scattering: Fundamentals and applications to fuels science. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 52 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701735 ER PT J AU Custer, JS Smith, PM Fleming, JG RohertyOsmun, E AF Custer, JS Smith, PM Fleming, JG RohertyOsmun, E TI CVD of ternary refractory nitride films for diffusion barrier applications in silicon microelectronics. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 54 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701922 ER PT J AU Nachtigal, NM Geist, GA Myers, JD Sachs, SR AF Nachtigal, NM Geist, GA Myers, JD Sachs, SR TI DOE2000 electronic notebook architecture. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 55 EP CINF PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700922 ER PT J AU Stewart, TL AF Stewart, TL TI Overview of US radioactive tank problem. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 55 EP IEC PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701923 ER PT J AU Brouns, TM Frey, JA Stewart, TL Allen, RW AF Brouns, TM Frey, JA Stewart, TL Allen, RW TI Tanks focus area: Technology program to meet doe's tank waste clean-up needs. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 57 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701925 ER PT J AU Parkinson, CI Rex, DB Bair, RA AF Parkinson, CI Rex, DB Bair, RA TI The EMSL publisher: A new tool for collaborative and distributed journal authoring. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 57 EP CINF PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700924 ER PT J AU Sandi, G Thiyagarajan, P Winans, RE Carrado, KA AF Sandi, G Thiyagarajan, P Winans, RE Carrado, KA TI Small angle neutron and X-ray scattering studies of carbons prepared using inorganic templates. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 58 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701741 ER PT J AU Holroyd, RA Nishikawa, M Itoh, K AF Holroyd, RA Nishikawa, M Itoh, K TI Electron reactions in supercritical ethane. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 59 EP PHYS PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900577 ER PT J AU Horwitz, EP Schulz, WW AF Horwitz, EP Schulz, WW TI Solvent extraction in the treatment of acidic and basic high level liquid waste: Where do we stand? SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 1 Z9 1 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 59 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701926 ER PT J AU Khalili, NR Pan, M Sandi, G AF Khalili, NR Pan, M Sandi, G TI Fractal analysis of granular activated carbons using isotherm data. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IIT,DEPT CHEM & ENVIRONM ENGN,CHICAGO,IL 60616. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 59 EP FUEL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701742 ER PT J AU Knutsen, K Orlando, TM AF Knutsen, K Orlando, TM TI Free radical reactions at NaNO3/Organic interfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 60 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900578 ER PT J AU vanHecke, HW AF vanHecke, HW TI Determining freezeout temperatures in relativistic heavy ion collisions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 60 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702792 ER PT J AU Bartels, DM AF Bartels, DM TI Lack of ionic strength effect in the recombination of hydrated electrons: (e-)(aq)+(e-)(aq)->2(OH-)+H-2. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 62 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900580 ER PT J AU Chiarizia, R Horwitz, EP Alexandratos, SD Gula, MJ AF Chiarizia, R Horwitz, EP Alexandratos, SD Gula, MJ TI Recent advances on the chemistry and applications of the Diphonix(R) resin. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 EICHROM IND INC,DARIEN,IL 60561. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 63 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701930 ER PT J AU Mason, CFV Garcia, C Dunfrund, F AF Mason, CFV Garcia, C Dunfrund, F TI Remedial options for the new catch box for testing of depleted uranium armaments at Yuma proving ground. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 63 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702795 ER PT J AU Newville, MG Carroll, SA Rehr, JJ Ravel, B Ankudinov, AL AF Newville, MG Carroll, SA Rehr, JJ Ravel, B Ankudinov, AL TI Calculations of XANES spectra for transition metal oxides and sulfides SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 63 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701815 ER PT J AU Clark, DL Conradson, SD Keogh, DW Neu, MP Palmer, PD Rogers, RD Runde, W Scott, BL Tait, CD AF Clark, DL Conradson, SD Keogh, DW Neu, MP Palmer, PD Rogers, RD Runde, W Scott, BL Tait, CD TI Coordination chemistry of actinide ions under highly alkaline conditions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,MAT SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 64 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701816 ER PT J AU Wishart, JF AF Wishart, JF TI The new picosecond pulse radiolysis system at Brookhaven National Laboratory. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 64 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900582 ER PT J AU Cook, A Curtiss, L AF Cook, A Curtiss, L TI NOx, heterogeneity, and radiation chemistry in nuclear waste. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 65 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900583 ER PT J AU Wasserman, SR Soderholm, L AF Wasserman, SR Soderholm, L TI The speciation of metal ions in surface modified and hydrothermally processed clay minerals SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 65 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701817 ER PT J AU Dever, L AF Dever, L TI The environmental management program at the department of energy's Nevada operations office. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV NEVADA,DEPT CHEM,LAS VEGAS,NV 89154. US DOE,NEVADA OPERAT OFF,LAS VEGAS,NV 89193. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 66 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700615 ER PT J AU Oxenberg, TP Ebinger, MH AF Oxenberg, TP Ebinger, MH TI Decommissioning Jefferson Proving Ground for restricted release. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 USA,TEST & EVALUAT COMMAND,ABERDEEN PROVING GROUND,MD 21005. LOS ALAMOS NATL LAB,ENVIRONM SCI GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 66 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702798 ER PT J AU Takahashi, K Sawamura, S Jonah, CD AF Takahashi, K Sawamura, S Jonah, CD TI Solute-fluid clustering and Onsager's cavity radius in supercritical fluids. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 HOKKAIDO UNIV,DIV QUANTUM ENERGY ENGN,SAPPORO,HOKKAIDO 060,JAPAN. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 68 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900586 ER PT J AU Zhong, CJ Porter, MD AF Zhong, CJ Porter, MD TI A quartz crystal microbalance characterization of vapor sorption at alkanethiolate monolayers on gold. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES LAB,USDOE,MICROANALYT INSTRUMENTAT CTR,AMES,IA 50011. RI Zhong, Chuan-Jian/D-3394-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 69 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700325 ER PT J AU Agnew, SF AF Agnew, SF TI Comparisons of historical process estimates with tank waste assays. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 70 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701937 ER PT J AU Huang, W Gilman, SD Gee, SJ Buchholz, BA Vogel, JS Hammock, BD AF Huang, W Gilman, SD Gee, SJ Buchholz, BA Vogel, JS Hammock, BD TI Application of accelerator mass spectrometry to the development of an immunoassay for atrazine and to a study of human metabolism of atrazine. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF DAVIS,DEPT ENTOMOL,DAVIS,CA 95616. UNIV CALIF DAVIS,DEPT ENVIRONM TOXICOL,DAVIS,CA 95616. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RI Buchholz, Bruce/G-1356-2011; Gilman, Samuel/D-1635-2016 OI Gilman, Samuel/0000-0001-7208-3894 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 70 EP AGRO PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700182 ER PT J AU Leiewer, SA Spahn, J AF Leiewer, SA Spahn, J TI DOE's HAZMAT Spill Center at the Nevada Test Site, activities and capabilities. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BECHTEL NEVADA,LAS VEGAS,NV 89193. US DOE,LAS VEGAS,NV 89193. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 70 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701557 ER PT J AU Colson, SD AF Colson, SD TI A risk and outcome based strategy for justifying characterization to resolve tank waste safety issues. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 71 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701938 ER PT J AU Jensen, L Dodd, DA Noonan, AF Thomas, TR AF Jensen, L Dodd, DA Noonan, AF Thomas, TR TI Technical approach to characterization of residual waste at Hanford Tank sites in support of closure alternatives. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NUMATEC HANFORD CORP, RICHLAND, WA 99352 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. LOCKHEED MARTIN IDAHO TECHNOL CO, IDAHO FALLS, ID 83415 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 72 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701939 ER PT J AU Velsko, CA Watkins, BE Pruneda, CO AF Velsko, CA Watkins, BE Pruneda, CO TI Emissions characterization in the contained underground demilitarization laboratory at the Nevada Test Site. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,ISOTOPE SCI DIV,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,ENERGET MAT CTR,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 72 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702804 ER PT J AU Bastiaans, GJ Iwatate, DF AF Bastiaans, GJ Iwatate, DF TI Vadose zone characterization for high level waste tank closure. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NUMATEC HANFORD CO,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 75 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701942 ER PT J AU Triay, IR Lu, N Cotter, CR Kitten, HD AF Triay, IR Lu, N Cotter, CR Kitten, HD TI Iron oxide colloid facilitated plutonium transport in groundwater. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 2 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 75 EP NUCL PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702807 ER PT J AU Kersting, AB Thompson, JL AF Kersting, AB Thompson, JL TI Near-field migration of radionuclides in the subsurface at the Nevada test site: Evidence for colloid transport of radionuclides through fractured volcanic rock SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 76 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702808 ER PT J AU Schroeder, NC Radzinski, SD Ball, JR Ashley, KR Whitener, GD AF Schroeder, NC Radzinski, SD Ball, JR Ashley, KR Whitener, GD TI Reillex(TM)-HPQ anion exchange column chromatography removal of pertechnetate ion from DSSF-5 simulant. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. TEXAS A&M UNIV,DEPT CHEM,COMMERCE,TX 75429. MACALESTER COLL,DEPT CHEM,ST PAUL,MN 55105. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 77 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701944 ER PT J AU Du, M Alexander, CW Bigelow, JE Collins, ED AF Du, M Alexander, CW Bigelow, JE Collins, ED TI Applications of Eichrom columns in processing of radioisotopes: Purification of irradiated strontium-89 in HCl and HNO3 media. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 78 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701945 ER PT J AU Dietz, ML Horwitz, EP Bond, AH AF Dietz, ML Horwitz, EP Bond, AH TI Extraction chromatography: Progress and opportunities. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DEPT CHEM,DARIEN,IL 60439. EICHROM IND INC,DARIEN,IL 60561. NR 0 TC 0 Z9 0 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 79 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701946 ER PT J AU Li, J Josowicz, M AF Li, J Josowicz, M TI Electrochemically induced synthesis of poly(cyclophosphazene-benzoquinone). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, DEPT CHEM & MAT SCI, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 81 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700337 ER PT J AU Awes, TC AF Awes, TC TI Collective flow at SPS energies. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 83 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702815 ER PT J AU Burks, BL Blank, JA Davis, HT Dunning, DC Falter, DD Fitzgerald, CL Glassell, RL Glover, WH Hobson, DE Johnson, MA Killough, SM Kington, DJ Lloyd, PD Love, LJ Murphree, EW Randolph, JD Russell, RA Rutenber, JE Toy, H VanHoesen, SD Wysor, JC AF Burks, BL Blank, JA Davis, HT Dunning, DC Falter, DD Fitzgerald, CL Glassell, RL Glover, WH Hobson, DE Johnson, MA Killough, SM Kington, DJ Lloyd, PD Love, LJ Murphree, EW Randolph, JD Russell, RA Rutenber, JE Toy, H VanHoesen, SD Wysor, JC TI Development and testing of a remotely operable tank waste retrieval system for the ORNL. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 83 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701950 ER PT J AU Dignon, J AF Dignon, J TI Sulfur emissions from fossil fuel combustion. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,DIV ATMOSPHER SCI,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 84 EP GEOC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701836 ER PT J AU Gao, H Angelici, RJ AF Gao, H Angelici, RJ TI New catalysts consisting of a homogeneous metal complex catalyst tethered to a silica supported metal catalyst. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 84 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701106 ER PT J AU Ma, ZX IjadiMaghsoodi, S Barton, TJ AF Ma, ZX IjadiMaghsoodi, S Barton, TJ TI Design and synthesis of novel blue-light-emitting photoluminescent monomers and polymers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV,AMES LAB,US DOE,DEPT CHEM,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 84 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901018 ER PT J AU McKee, SD Seitz, MG AF McKee, SD Seitz, MG TI Research and development for stabilization of nuclear materials for the DOE complex. DNFSB recommendation 94-1 and a status report. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,ADV TECHNOL GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 85 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702817 ER PT J AU Powell, MR AF Powell, MR TI The development of physical property simulants for doe radioactive tank wastes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 85 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701951 ER PT J AU Carteret, BA Lee, JH Gibbons, PW AF Carteret, BA Lee, JH Gibbons, PW TI Light duty utility arm system: A case study of technology deployment. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NUMATEC HANFORD CO,RICHLAND,WA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 86 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701952 ER PT J AU Kathios, DJ AF Kathios, DJ TI The stabilization of combustible materials generated in nuclear materials applications using pyrolysis off-gas treatment. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,NUCL MAT TECHNOL ACTINIDE PROC CHEM GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 87 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702819 ER PT J AU Yount, JA AF Yount, JA TI Retrieval analysis tool - A process database. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 87 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701953 ER PT J AU Daymo, EA Reynolds, BA Geeting, JGH Hymas, CR Zhang, J AF Daymo, EA Reynolds, BA Geeting, JGH Hymas, CR Zhang, J TI Radioactive slurry transport issues and proposed monitoring equipment for the Hanford Site. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 88 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701954 ER PT J AU Firestone, MA Tiede, DM Thiyagarajan, P AF Firestone, MA Tiede, DM Thiyagarajan, P TI Magnetic field-induced orientation of self-assembled membrane mimetic gels. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 89 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701111 ER PT J AU Veirs, DK Rosenblatt, GM Heiple, CR Baiardo, JP AF Veirs, DK Rosenblatt, GM Heiple, CR Baiardo, JP TI The use of acoustic resonance spectroscopy to detect changes within storage containers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 89 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702821 ER PT J AU FosterMills, NS Autrey, ST Amonette, JE AF FosterMills, NS Autrey, ST Amonette, JE TI Photoacoustic spectroscopy - What is it good for?. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 90 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700346 ER PT J AU Liu, J Feng, X Fryxell, GE Gong, M Baskaran, S Chen, X AF Liu, J Feng, X Fryxell, GE Gong, M Baskaran, S Chen, X TI Heavy metal separation by functionalized mesoporous materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW NATL LAB,RICHLAND,WA 99352. NR 0 TC 1 Z9 3 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 90 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701956 ER PT J AU Morris, DE Buscher, CT Wheeler, AR Donohoe, RJ Tait, CD AF Morris, DE Buscher, CT Wheeler, AR Donohoe, RJ Tait, CD TI Aging effects and speciation of actinides on ion-exchange resins. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 90 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702822 ER PT J AU Horrell, DR AF Horrell, DR TI Long-term storage of plutonium oxides. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 91 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702823 ER PT J AU Havrilla, GJ Schoonover, J Weesner, F Worley, C Treado, P Sparrow, M AF Havrilla, GJ Schoonover, J Weesner, F Worley, C Treado, P Sparrow, M TI Materials characterization using elemental and molecular imaging. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV PITTSBURGH,DEPT CHEM,PITTSBURGH,PA 15260. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 93 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700349 ER PT J AU Beahm, EC Weber, CF Hunt, RD Dillow, TA AF Beahm, EC Weber, CF Hunt, RD Dillow, TA TI Solids control in sludge pretreatment. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 95 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701961 ER PT J AU Lumetta, GJ Rapko, BM Temer, DJ Egan, BZ AF Lumetta, GJ Rapko, BM Temer, DJ Egan, BZ TI Enhanced Sludge Washing for pretreating Hanford tank sludges. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 96 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701962 ER PT J AU Miller, JE Trudell, DE Krumhansl, JL Anthony, RG Philip, CV Huckman, M Latheef, I AF Miller, JE Trudell, DE Krumhansl, JL Anthony, RG Philip, CV Huckman, M Latheef, I TI Development and properties of a crystalline silicotitanate cesium-selective ion exchanger. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. TEXAS A&M UNIV,DEPT CHEM ENGN,COLLEGE STN,TX 77843. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 97 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701963 ER PT J AU Walker, JF Taylor, PA AF Walker, JF Taylor, PA TI Full scale cesium removal demonstration using crystalline silicotitanate sorbent. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 97 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702829 ER PT J AU Krause, TR Cunnane, JC AF Krause, TR Cunnane, JC TI Separation of cesium from crystalline silicotitanates. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM TECHNOL,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 98 EP NUCL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702830 ER PT J AU Blanchard, DL Lawrence, WE Kurath, DE Golcar, GR Conradson, SD AF Blanchard, DL Lawrence, WE Kurath, DE Golcar, GR Conradson, SD TI Technetium removal from Hanford tank wastes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 99 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701965 ER PT J AU Ge, NH Wong, CM Lingle, RL McNeil, JD Gaffney, KJ Harris, CB AF Ge, NH Wong, CM Lingle, RL McNeil, JD Gaffney, KJ Harris, CB TI Femtosecond dynamics of two-dimensional electron localization at metal-dielectric interfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 99 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900616 ER PT J AU Jonah, CD Xujia, Z Yi, L Mudaliar, M AF Jonah, CD Xujia, Z Yi, L Mudaliar, M TI The solvation of benzophenone anions and electrons in alcohols the role of solvent structure. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 102 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900619 ER PT J AU Marley, NA Gaffney, JS AF Marley, NA Gaffney, JS TI Further investigations into the temperature dependence of ozone-hydrocarbon chemiluminescent reactions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV ENVIRONM RES,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 105 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701127 ER PT J AU Crowell, RA Bartels, DM AF Crowell, RA Bartels, DM TI Multiphoton ionization of water. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 106 EP PHYS PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900623 ER PT J AU Vincent, JM Rabion, A Yachandra, VK Fish, RH AF Vincent, JM Rabion, A Yachandra, VK Fish, RH TI Fluorous biphasic catalysis. Synthesis of a tris-N-[C8F17(CH2)(3)](3)-1,4,7-triazacyclononane ligand and complexation with [Mn(C8F17(CH2)(2)CO2)(2)(H2O)(2)] and its Co2+ analog to provide perfluoroheptane soluble catalysts for alkane and alkene functionalization in the presence of TBHP/O-2. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 106 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701972 ER PT J AU Bennet, WM Elder, HH AF Bennet, WM Elder, HH TI Startup of Savannah river's defense waste process facility to produce canisters of radioactive glass. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER LAB,AIKEN,SC 29808. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 108 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701974 ER PT J AU Gramer, CJ Raymond, KN AF Gramer, CJ Raymond, KN TI 2,3-dihydroxyterephthalamides for application as actinide extractants. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 2 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 108 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85702127 ER PT J AU Shen, YR AF Shen, YR TI Vibrational spectroscopic studies of liquid interfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DEPT PHYS,DIV SCI MAT,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 108 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900625 ER PT J AU Rosentreter, JJ Gering, K Quarder, HS Carkeet, C Bunde, RL AF Rosentreter, JJ Gering, K Quarder, HS Carkeet, C Bunde, RL TI Solar treatment of complex anionic cyanide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO STATE UNIV,DEPT CHEM,POCATELLO,ID 83209. LOCKHEED MARTIN IDAHO TECHNOL CO,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 109 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701596 ER PT J AU Bates, JK Ebert, WL Strachan, DM AF Bates, JK Ebert, WL Strachan, DM TI Evaluation of waste glass corrosion mechanisms through laboratory testing and analysis. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 110 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701976 ER PT J AU Spence, RD Gilliam, TM AF Spence, RD Gilliam, TM TI Immobilization of tank wastes at Oak Ridge National Laboratory. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 111 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701977 ER PT J AU Mesko, MG Day, DE Bunker, B AF Mesko, MG Day, DE Bunker, B TI Immobilization of high-level radioactive sludges in iron phosphate glass SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV MISSOURI, ROLLA, MO 65401 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 112 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701978 ER PT J AU Langlois, DA Smith, ME Benicewicz, BC Gavrin, A Douglas, EP AF Langlois, DA Smith, ME Benicewicz, BC Gavrin, A Douglas, EP TI Bisacetylene liquid crystalline thermosets with flexible tails SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV FLORIDA,DEPT MAT SCI & ENGN,GAINESVILLE,FL 32611. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 113 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901047 ER PT J AU Baumann, TF Reynolds, JG Fox, GA AF Baumann, TF Reynolds, JG Fox, GA TI Synthesis of novel pendant arm crown thioethers for mercury removal from acidic aqueous solutions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 117 EP ENVR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701604 ER PT J AU Brodzinski, RL Hensley, WK Lepel, EA Smith, MR AF Brodzinski, RL Hensley, WK Lepel, EA Smith, MR TI Detecting 137CS breakthrough in an ion exchange process. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 121 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701987 ER PT J AU Taylor, RS Dang, LX Schenter, GK Garrett, BC AF Taylor, RS Dang, LX Schenter, GK Garrett, BC TI Molecular dynamics simulations of the liquid/vapor interface of water: The uptake of alcohols SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. RI Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 121 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701143 ER PT J AU Crawford, BA Kyle, KR AF Crawford, BA Kyle, KR TI Qualification of Raman analysis on Hanford tank wastes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NUMATEC HANFORD CORP,RICHLAND,WA 99352. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 122 EP IEC PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701988 ER PT J AU Dieckman, SL Balss, KM Waterfield, LG Slaughter, SE Jendrzejczyk, JA AF Dieckman, SL Balss, KM Waterfield, LG Slaughter, SE Jendrzejczyk, JA TI Development of a magnetic resonance sensor for the on-line monitoring of 99-Tc in tank waste cleanup. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 123 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701989 ER PT J AU Lee, YN Zhou, X Feng, H AF Lee, YN Zhou, X Feng, H TI Laboratory determination of fast aqueous-phase ozone reactions. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,ENVIRONM CHEM DIV,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 123 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701145 ER PT J AU Havrilla, GJ Colletti, L AF Havrilla, GJ Colletti, L TI Characterization of actinide contaminated waste with x-ray microfluorescence SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 125 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701991 ER PT J AU Marasas, R Iyoda, T Miller, JR AF Marasas, R Iyoda, T Miller, JR TI Energetics for reactions of solvated electrons and other strong reductants in THF. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RI Iyoda, Tomokazu/F-4731-2015 OI Iyoda, Tomokazu/0000-0002-9393-5387 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 125 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900642 ER PT J AU Hylton, TD Anderson, MS VanEssen, DC Bayne, CK AF Hylton, TD Anderson, MS VanEssen, DC Bayne, CK TI Comparative testing of slurry monitors. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 126 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701992 ER PT J AU Holroyd, R AF Holroyd, R TI Electron equilibria in hydrocarbons. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 128 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900645 ER PT J AU Sheen, SH Chien, HT Raptis, AC AF Sheen, SH Chien, HT Raptis, AC TI Ultrasonic sensors for on-line monitoring of viscosity and solid concentration in a waste transport line. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 128 EP IEC PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701994 ER PT J AU Rego, JA Beeson, PM Olson, RE Cahill, PA AF Rego, JA Beeson, PM Olson, RE Cahill, PA TI Fabrication of atomic-number gradient materials for inertial confinement SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 129 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85901063 ER PT J AU Aldstadt, JH Olson, DC Wolcott, DK Marshall, GD Szostek, B Martin, AF AF Aldstadt, JH Olson, DC Wolcott, DK Marshall, GD Szostek, B Martin, AF TI Determination of Lewisite in the environment using a field-portable monitor. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV ENVIRONM RES,ARGONNE,IL 60439. FIA SOLUT INC,GIG HARBOR,WA 99335. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 130 EP ANYL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85700386 ER PT J AU Henson, BF Wilson, KR Casson, JL Robinson, JM AF Henson, BF Wilson, KR Casson, JL Robinson, JM TI Eley-Rideal mechanism of N2O5 and ClONO2 reactivity on simulated PSC surfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 130 EP COLL PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ857 UT WOS:A1997XQ85701152 ER PT J AU Dang, LX AF Dang, LX TI Simulations of water and water-chlorinated hydrocarbon liquid/liquid interfaces with polarizable potential models. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD SEP 7 PY 1997 VL 214 BP 134 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA XQ859 UT WOS:A1997XQ85900651 ER EF