FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Ly, S McNerney, G Fore, S Chan, J Huser, T AF Ly, Sonny McNerney, Gregory Fore, Samantha Chan, James Huser, Thomas TI ANYL 335-Time-gated single photon counting enables separation of coherent Anti-Stokes Raman scattering (CARS) microscopy data from multiphoton-excited tissue autofluorescence SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ly, Sonny; McNerney, Gregory; Fore, Samantha; Huser, Thomas] Univ Calif Davis, NSF Ctr Biophoton, Sacramento, CA 95817 USA. [Chan, James] Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, Livermore, CA 95718 USA. [Huser, Thomas] Univ Calif Davis, Dept Internal Med, Sacramento, CA 95817 USA. EM trhuser@ucdavis.edu; trhuser@ucdavis.edu; trhuser@ucdavis.edu; trhuser@ucdavis.edu; trhuser@ucdavis.edu RI Huser, Thomas/H-1195-2012 OI Huser, Thomas/0000-0003-2348-7416 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 335-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901442 ER PT J AU Lyles, BF Burke, JT Bernstein, LA Bleuel, DL Escher, J Thompson, I Dietrich, F Phair, LW Gibelin, JD Wiedeking, M McMahan, MA Rodriguez-Vieitez, E Clark, RM Macchiavelli, AO Lesher, SR Beausang, CW AF Lyles, Bethany F. Burke, Jason T. Bernstein, L. A. Bleuel, D. L. Escher, J. Thompson, I. Dietrich, Frank Phair, L. W. Gibelin, J. D. Wiedeking, M. McMahan, M. A. Rodriguez-Vieitez, E. Clark, R. M. Macchiavelli, Augusto O. Lesher, S. R. Beausang, C. W. TI Effects of angular momentum population distributions on the Surrogate Method SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Lyles, Bethany F.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. [Escher, J.; Thompson, I.; Dietrich, Frank] Lawrence Livermore Natl Lab, Nucl Theory & Modeling Grp, Livermore, CA 94551 USA. [Phair, L. W.; Gibelin, J. D.; Wiedeking, M.; McMahan, M. A.; Rodriguez-Vieitez, E.; Clark, R. M.; Macchiavelli, Augusto O.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. [Lesher, S. R.; Beausang, C. W.] Univ Richmond, Dept Phys, Gottwald Sci Ctr, Richmond, VA 23173 USA. EM bethany@nuc.berkeley.edu; labernstein@llnl.gov; bleuel1@llnl.gov; dietrich2@llnl.gov; lwphair@lbl.gov; mwiedeking@lbl.gov; p_mcmahan@lbl.gov; ervieitez@lbl.gov; aom@lbl.gov; cbeausan@richmond.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 126-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904564 ER PT J AU Manning, MC Van Pelt, CM Meglen, RR Stevens, FJ AF Manning, Mark Cornell Van Pelt, Cody M. Meglen, Robert R. Stevens, Fred J. TI BIOT 231-Chemometric approach toward protein aggregation propensity SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Manning, Mark Cornell; Van Pelt, Cody M.] Legacy BioDesign LLC, Loveland, CO 80538 USA. [Meglen, Robert R.] Latent Struct LLC, Boulder, CO 80303 USA. [Stevens, Fred J.] Argonne Natl Lab, Argonne, IL 60439 USA. EM manning@legacybiodesign.com; cvanpelt@legacybiodesign.com; bmeglen@LatentStructures.com; fstevens@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 231-BIOT PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903371 ER PT J AU Marshall, CL AF Marshall, Christopher L. TI Oxidative dehydrogenation of propane over nanostructured membrane catalyst SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Marshall, Christopher L.] Argonne Natl Labs, Div Chem Engn, Argonne, IL 60439 USA. EM CLMarshall@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 3-PETR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904802 ER PT J AU Martin, LR Mincher, BJ Schmitt, NC AF Martin, Leigh R. Mincher, Bruce J. Schmitt, Nicholas C. TI INOR 541-Investigations of the higher oxidation states of americium SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Martin, Leigh R.; Mincher, Bruce J.] Idaho Natl Lab, Aqueous Separat & Radiochem Dept, Idaho Falls, ID 83415 USA. [Schmitt, Nicholas C.] Idaho Natl Lab, Dept Chem, Idaho Falls, ID 83415 USA. EM Leigh.Martin@inl.gov; bruce.mincher@inl.gov; nicholas.schmitt@inl.gov RI Martin, Leigh/P-3167-2016; Mincher, Bruce/C-7758-2017 OI Martin, Leigh/0000-0001-7241-7110; NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 541-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909384 ER PT J AU Martin, LR Peterman, DR Bauer, WF AF Martin, Leigh R. Peterman, Dean R. Bauer, William F. TI INOR 189-Development of a glovebox for actinide molecular spectroscopy SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Martin, Leigh R.; Peterman, Dean R.] Idaho Natl Lab, Aqueous Separat & Radiochem Dept, Idaho Falls, ID 83415 USA. EM Leigh.Martin@inl.gov; dean.peterman@inl.gov; william.bauer@inl.gov RI Martin, Leigh/P-3167-2016; Bauer, William/B-8357-2016 OI Martin, Leigh/0000-0001-7241-7110; Bauer, William/0000-0002-7190-9700 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 189-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909368 ER PT J AU Martin, RL AF Martin, Richard L. TI COMP 183-Screened hybrid DFT and the Mott transition in MnO SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Martin, Richard L.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM rlmartin@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 183-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906128 ER PT J AU Mastroianni, AJ Sivak, DA Geissler, PL Alivisatos, AP AF Mastroianni, Alexander J. Sivak, David A. Geissler, Phillip L. Alivisatos, A. Paul TI PHYS 648-DNA flexibility measured with small angle X-ray scattering using gold nanoparticle markers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Mastroianni, Alexander J.; Sivak, David A.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. [Alivisatos, A. Paul] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM ajm@berkeley.edu; alivis@berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 648-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907339 ER PT J AU Maye, MM Nykypanchuk, D Freimuth, P van der Lelie, D Gang, O AF Maye, Mathew M. Nykypanchuk, Dmytro Freimuth, Paul van der Lelie, Daniel Gang, Oleg TI INOR 268-Controlling self-assembly reactivity in DNA- and protein-nanoparticle systems SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Maye, Mathew M.; Nykypanchuk, Dmytro; van der Lelie, Daniel; Gang, Oleg] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. [Freimuth, Paul] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. EM mmaye@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 268-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909459 ER PT J AU Maye, MM Nykypanchuk, D Gang, O van der Lelie, D AF Maye, Mathew M. Nykypanchuk, Dmytro Gang, Oleg van der Lelie, Daniel TI INOR 821-Manipulating assembly properties in DNA-nanoparticle systems SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Maye, Mathew M.; Nykypanchuk, Dmytro; Gang, Oleg; van der Lelie, Daniel] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. EM mmaye@bnl.gov NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 821-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909418 ER PT J AU McCormick, MS Sazinsky, MH Dunten, PW DiDonato, A Lippard, SJ AF McCormick, Michael S. Sazinsky, Matthew H. Dunten, Pete W. DiDonato, Alberto Lippard, Stephen J. TI INOR 26-X-ray structure of a hydroxylase-regulatory protein complex from phenol hydroxylase, a hydrocarbon oxidizing multicomponent monooxygenase SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [McCormick, Michael S.; Sazinsky, Matthew H.; Lippard, Stephen J.] MIT, Dept Chem, Cambridge, MA 02139 USA. [Dunten, Pete W.] Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. [DiDonato, Alberto] Univ Naples Federico 2, Dipartimento Biol Strutturale Funz, I-80126 Naples, Italy. [DiDonato, Alberto] CEINGE Biotecnol Avanzate, I-80126 Naples, Italy. NR 0 TC 0 Z9 0 U1 2 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 26-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909163 ER PT J AU McNally, JS Harrup, MK Luther, TA AF McNally, Joshua S. Harrup, Mason K. Luther, Thomas A. TI INOR 245-Novel phosphazene rings as liquid electrolytes in lithium-ion batteries SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [McNally, Joshua S.; Harrup, Mason K.; Luther, Thomas A.] Idaho Natl Lab, Dept Chem Sci, Idaho Falls, ID 83415 USA. EM joshua.mcnally@inl.gov; mason.harrup@inl.gov; thomas.luther@inl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 245-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908778 ER PT J AU McWhorter, S Kosterev, AA Ashcraft, BM Tittel, FK AF McWhorter, Scott Kosterev, Anatoliy A. Ashcraft, Blythe M. Tittel, Frank K. TI Application of quartz enhanced photoacoustic spectroscopy for trace gas sensing in a hydrogen process SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [McWhorter, Scott] Washington Savannah River Co, Savannah River Natl Lab, Hydrogen Technol Res Lab, Washington, DC 29808 USA. [Kosterev, Anatoliy A.] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA. [Ashcraft, Blythe M.] Savannah River Natl Lab, Hydrogen Technol Res Lab, Aiken, SC 30809 USA. [Tittel, Frank K.] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA. EM scott.mcwhorter@srs.gov; akoster@rice.edu; blythe.ashcraft@srs.gov; fkt@rice.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 142-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904668 ER PT J AU Mei, DH AF Mei, Donghai TI PHYS 80-First-principles-based kinetic Monte Carlo simulations of water-gas shift reaction on copper and platinum surfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Mei, Donghai] Div Mat & Chem Sci, Pacific NW Natl Lab, Richland, WA 99352 USA. EM donghai.mei@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 80-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907179 ER PT J AU Mei, DH Deskins, NA Dupuis, M Ge, QF AF Mei, Donghai Deskins, N. Aaron Dupuis, Michel Ge, Qingfeng TI CATL 12-Methanol adsorption and decomposition over unreduced ceria surface: A density functional theory study SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Mei, Donghai; Deskins, N. Aaron; Dupuis, Michel] Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA. [Ge, Qingfeng] So Illinois Univ, Dept Chem & Biochem, Carbondale, IL 62901 USA. EM donghai.mei@pnl.gov; nathaniel.deskins@pnl.gov; michel.dupuis@pnl.gov; qge@chem.siu.edu NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 12-CATL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900808 ER PT J AU Metz, LA Payne, RF Engelmann, MD AF Metz, L. A. Payne, R. F. Engelmann, M. D. TI Optimizing separation of iodine from halogen interferences in preparation for TIMS analysis SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Metz, L. A.; Payne, R. F.; Engelmann, M. D.] Pacific NW Natl Lab, Richland, WA 99352 USA. EM lori.metz@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 77-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904671 ER PT J AU Michaels, G AF Michaels, Gordon TI ANYL 3-Electric energy storage applications for transportation SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Michaels, Gordon] Oak Ridge Natl Lab, Energy & Engn Sci Directorate, Oak Ridge, TN 37831 USA. EM michaelsge@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 3-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901337 ER PT J AU Miller, AE Petersen, PB Hollars, CW Saykally, RJ AF Miller, Abigail E. Petersen, Poul B. Hollars, Christopher W. Saykally, Richard J. TI PHYS 348-Investigating beta amyloid 1-16 at the air-water interface SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Miller, Abigail E.] Univ Calif Berkeley, Dept Chem, Saykally Grp, Berkeley, CA 94720 USA. [Petersen, Poul B.] MIT, Dept Chem, Cambridge, MA 02144 USA. [Hollars, Christopher W.] Lawrence Livermore Natl Lab, Dept Chem & Mat Sci, Livermore, CA 94550 USA. [Saykally, Richard J.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM aem20@berkeley.edu; poul@mit.edu; hollarsl@llnl.gov; saykally@berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 348-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907367 ER PT J AU Miller, JB Matranga, C Morreale, BD Gellman, AJ AF Miller, James B. Matranga, Christopher Morreale, Bryan D. Gellman, Andrew J. TI COLL 504-The influence of H2S on surface segregation patterns in a polycrystalline Pd70Cu30 hydrogen separation membrane SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Miller, James B.; Gellman, Andrew J.] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. [Matranga, Christopher; Morreale, Bryan D.] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. EM jbmiller@andrew.cmu.edu; matranga@netl.doe.gov; bryan.morreale@netl.doe.gov; gellman@cmu.edu RI Matranga, Christopher/E-4741-2015 OI Matranga, Christopher/0000-0001-7082-5938 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 504-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902009 ER PT J AU Minogue, EM AF Minogue, Edel M. TI Sensors for radiochemical applications SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Minogue, Edel M.] Los Alamos Natl Lab, Div Chem, C ADI, Los Alamos, NM 87545 USA. EM edel@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 68-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904571 ER PT J AU Montalvo, MR Kleinsteuber, J AF Montalvo, Mary Rose Kleinsteuber, James TI TECH 8 - Pathway to an injury free career: Safety observations at the Stockpile Manufacturing and Support Directorate at Los Alamos National Laboratory SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Montalvo, Mary Rose; Kleinsteuber, James] Los Alamos Natl Lab, PMT DO, Los Alamos, NM 87545 USA. EM mmontalvo@lanl.gov; jimfk@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 8-TECH PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905066 ER PT J AU Moretto, LG AF Moretto, Luciano G. TI Phase transitions from hadronic to partonic worlds SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Moretto, Luciano G.] Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Berkeley, CA 94720 USA. EM lgmoretto@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 85-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904630 ER PT J AU Morreale, BD Howard, B Taylor, C Iyoha, O Enick, RM Miller, J Sholl, DS Alfonso, DR Ciocco, MV AF Morreale, Bryan D. Howard, Bret Taylor, Charles Iyoha, Osemwengie Enick, Robert M. Miller, James Sholl, David S. Alfonso, Dominic R. Ciocco, Michael V. TI FUEL 242-Toward water-gas shift enhancement and carbon capture in gasification environments SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Morreale, Bryan D.] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. [Taylor, Charles] US DOE, NETL, Pittsburgh, PA 15236 USA. [Enick, Robert M.] Univ Pittsburgh, US DOE NETL, NETL, Dept Chem & Pet Eng, Pittsburgh, PA 15261 USA. [Miller, James; Sholl, David S.] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. [Alfonso, Dominic R.] PARSONS, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. Parsons, NETL, South Pk, PA 15129 USA. EM bryan.morreale@netl.doe.gov; BRET.HOWARD@netl.doe.gov; charles.taylor@netl.doe.gov; enick@engr.pitt.edu; jbmiller@andrew.cmu.edu; sholl@andrew.cmu.edu; alfonso@netl.doe.gov; Michael.Ciocco@pp.netl.doe.gov NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 242-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903548 ER PT J AU Morse, J Park, HG Spadaccini, C Upadhye, R Graff, RT AF Morse, Jeffrey Park, Hyung Gyu Spadaccini, Chris Upadhye, Ravi Graff, Robert T. TI FUEL 273-MEMS Based methanol reforming system for small scale hydrogen production SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Morse, Jeffrey; Park, Hyung Gyu; Spadaccini, Chris; Upadhye, Ravi; Graff, Robert T.] Lawrence Livermore Natl Lab, Ctr Micro & Nano Technol, Livermore, CA 94550 USA. EM morse3@llnl.gov RI Park, Hyung Gyu/F-3056-2013 OI Park, Hyung Gyu/0000-0001-8121-2344 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 273-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903649 ER PT J AU Moyer, BA Bonnesen, PV Custelcean, R Delmau, LH Haverlock, TJ Hay, BP Pham, CG Powers, AD Sessler, JL Bowman-James, K AF Moyer, Bruce A. Bonnesen, Peter V. Custelcean, Radu Delmau, Laetitia H. Haverlock, Tamara J. Hay, Benjamin P. Pham, Carol G. Powers, Alicia D. Sessler, Jonathan L. Bowman-James, Kristin TI INOR 401-Strategies for employing host-guest chemistry in liquid-liquid separation of anions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Moyer, Bruce A.; Bonnesen, Peter V.; Custelcean, Radu; Delmau, Laetitia H.; Haverlock, Tamara J.; Hay, Benjamin P.; Pham, Carol G.; Powers, Alicia D.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. [Sessler, Jonathan L.] Univ Texas Austin, Dept Chem & Biochem, Austin, TX 78712 USA. [Bowman-James, Kristin] Univ Kansas, Dept Chem, Lawrence, KS 66045 USA. EM moyerba@ornl.gov; custelceanr@ornl.gov; delmaulh@ornl.gov; keevertj@ornl.gov; haybp@ornl.gov; sessler@mail.utexas.edu; kbjames@ku.edu RI 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 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 401-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909734 ER PT J AU Mrozek, RA Cole, PJ Lenhart, JL AF Mrozek, Randy A. Cole, Phillip J. Lenhart, Joseph L. TI Effect of sol molecular weight on the mechanical properties and sol migration in polymer gels SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Mrozek, Randy A.; Cole, Phillip J.; Lenhart, Joseph L.] Sandia Natl Labs, Organ Mat Dept, Albuquerque, NM 87185 USA. EM rmrozek@sandia.gov; pjcole@sandia.gov; jllenha@sandia.gov NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 515-PMSE PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905793 ER PT J AU Muckerman, JT Fujita, E Polyansky, D Tanaka, K AF Muckerman, James T. Fujita, Etsuko Polyansky, Dmitry Tanaka, Koji TI PHYS 78-Computational studies in electrocatalysis: Homogeneous catalysis of water oxidation using a Ru-based multielectron catalyst SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Muckerman, James T.; Fujita, Etsuko; Polyansky, Dmitry] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. [Tanaka, Koji] Natl Inst Nat Sci, CREST, Okazaki, Aichi 4448787, Japan. Natl Inst Nat Sci, Inst Mol Sci, Coordinat Lab, Okazaki, Aichi 4448787, Japan. EM muckerma@bnl.gov; fujita@bnl.gov; dmitriyp@bnl.gov; ktanaka@ims.ac.jp RI Fujita, Etsuko/D-8814-2013; Muckerman, James/D-8752-2013 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 78-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907328 ER PT J AU Muller, RP Kemp, RA Goldberg, KI AF Muller, Richard P. Kemp, Richard A. Goldberg, Karen I. TI INOR 14-Mechanism of molecular oxygen insertion in a Pd(II)-H bond SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Muller, Richard P.] Sandia Natl Labs, Multiscale Dynam Mat Modeling, Albuquerque, NM 87185 USA. [Kemp, Richard A.] Univ New Mexico, Dept Chem, Albuquerque, NM 87106 USA. [Goldberg, Karen I.] Univ Washington, Dept Chem, Seattle, WA 98195 USA. EM rmuller@sandia.gov; goldberg@chem.washington.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 14-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909449 ER PT J AU Muller, RP Ingersoll, D AF Muller, Richard P. Ingersoll, David TI PHYS 251-Computational studies of oxygen reduction by cofacial porphyrins SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Muller, Richard P.; Ingersoll, David] Sandia Natl Labs, Multiscale Dynam Mat Modeling, Albuquerque, NM 87185 USA. EM rmuller@sandia.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 251-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907508 ER PT J AU Muller, RP AF Muller, Richard P. TI Density functional theory with accurate bond-breaking and band-gaps using generalized valence bond wave functions via the optimized effective potential method SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Muller, Richard P.] Sandia Natl Labs, Albuquerque, NM 87185 USA. EM rmuller@sandia.gov NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 435-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906014 ER PT J AU Mundt, JM AF Mundt, Janna M. TI BIOL 10-Incorporation of exogenous 8-oxodG into DNA and RNA requires purine nucleoside phosphorylase in MCF-7 cells SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Mundt, Janna M.] Lawrence Livermore Natl Lab, Biosci Directorate, Livermore, CA 94551 USA. EM mundt1@llnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 10-BIOL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900800 ER PT J AU Mundy, CJ Kathmann, SM Kuo, WIF AF Mundy, Christopher J. Kathmann, Shawn M. Kuo, Will. I-F. TI COMP 432-Liquid-vapor interfaces of hydrogen bonded fluids using density functional theory interaction potentials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Mundy, Christopher J.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA. [Kathmann, Shawn M.] Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. [Kuo, Will. I-F.] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. EM chris.mundy@pnl.gov; shawn.kathmann@pnl.gov; kuo2@llnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 432-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906145 ER PT J AU Murkin, AS Birck, MR Rinaldo-Matthis, A Shi, WX Almo, SC Schramm, VL AF Murkin, Andrew S. Birck, Matthew R. Rinaldo-Matthis, Agnes Shi, Wuxian Almo, Steve C. Schramm, Vern L. TI BIOL 229-Neighboring group participation in the transition state of purine nucleoside phosphorylase SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Murkin, Andrew S.; Rinaldo-Matthis, Agnes; Almo, Steve C.; Schramm, Vern L.] Yeshiva Univ, Dept Biochem, Albert Einstein Coll Med, Bronx, NY 10461 USA. [Birck, Matthew R.] Columbia Univ Barnard Coll, Dept Chem, New York, NY 10027 USA. [Shi, Wuxian] Brookhaven Natl Lab, Ctr Synchrotron Biosci, Upton, NY 11973 USA. EM amurkin@aecom.yu.edu; mbirck@barnard.edu; arinaldo@medusa.bioc.aecom.yu.edu; wushi@bnl.gov; almo@aecom.yu.edu; vern@aecom.yu.edu NR 0 TC 0 Z9 0 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 229-BIOL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900596 ER PT J AU Mwakisege, J Mirzadeh, S Boll, RA Schweitzer, G AF Mwakisege, J. Mirzadeh, Saed Boll, R. A. Schweitzer, G. TI Synthesis and chemical stability of actinium-fullerenes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Mwakisege, J.; Boll, R. A.; Schweitzer, G.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. [Mirzadeh, Saed] Oak Ridge Natl Lab, Nucl Sci & Technol Div, Knoxville, TN 37831 USA. EM mirzadehs@ornl.gov RI Boll, Rose/C-4138-2016 OI Boll, Rose/0000-0003-2507-4834 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 33-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904665 ER PT J AU Myers, CR Ilconich, JB Pennline, HW Luebke, DR AF Myers, Christina R. Ilconich, Jeffery B. Pennline, Henry W. Luebke, David R. TI COLL 503-Supported ionic liquid membranes for gas separation SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Myers, Christina R.; Pennline, Henry W.; Luebke, David R.] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. [Ilconich, Jeffery B.] Parsons RDS, South Pk, PA 15129 USA. EM christina.myers@netl.doe.gov; jeffery.ilconich@netl.doe.gov; david.luebke@netl.doe.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 503-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902135 ER PT J AU Myshakin, EM Jiang, H Jordan, KD AF Myshakin, Evgeniy M. Jiang, Hao Jordan, Kenneth D. TI PHYS 549-Molecular dynamics simulations of methane hydrate decomposition using a polarizable force field SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Myshakin, Evgeniy M.] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. [Jiang, Hao; Jordan, Kenneth D.] Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA. EM Evgeniy.Myshakin@netl.doe.gov; jianghao@pitt.edu; jordan@pitt.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 549-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907474 ER PT J AU Newton, MD AF Newton, Marshall D. TI Mechanistic analysis of electron transfer at film-modified metal electrodes and computation of associated electronic structure and energtics SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Newton, Marshall D.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM Newton@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 122-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907011 ER PT J AU Nichols, JA AF Nichols, Jeffrey A. TI COMP 182-Performing simulations at the terascale today and at the sustained petascale "tomorrow" SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Nichols, Jeffrey A.] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. EM nicholsja@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 182-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906437 ER PT J AU Nieweg, JA Kern, C Lin, VSY AF Nieweg, Jennifer A. Kern, Carla Lin, Victor S-Y. TI Environmentally friendly cooperative acid-base mixed-oxide catalytic systems for the synthesis of biodiesel SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Iowa State Univ, Dept Chem, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM jnieweg@iastate.edu; vsylin@iastate.edu NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 31-PETR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904783 ER PT J AU Nizkorodov, S Bateman, A Mang, S Pan, XA Underwood, J Walser, M Xing, JH Dessiaterik, Y Laskin, A Laskin, J AF Nizkorodov, Sergey Bateman, Adam Mang, Stephen Pan, Xiang Underwood, Joelle Walser, Maggie Xing, Jiahua Dessiaterik, Yuri Laskin, Alexander Laskin, Julia TI ENVR 6-Photochemistry of secondary organic aerosol particles formed in oxidation of monoterpenes by O3 and NO3 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Nizkorodov, Sergey; Bateman, Adam; Mang, Stephen; Pan, Xiang; Underwood, Joelle; Walser, Maggie; Xing, Jiahua] Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA. [Dessiaterik, Yuri; Laskin, Alexander] Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA. [Laskin, Julia] Pacific NW Natl Lab, Richland, WA 99352 USA. EM nizkorod@uci.edu; abateman@uci.edu; samng@uci.edu; xpan@uci.edu; mwalser@uci.edu; yury.desyaterik@pnl.gov; Alexander.Laskin@pnl.gov; Julia.Laskin@pnl.gov RI Laskin, Julia/H-9974-2012 OI Laskin, Julia/0000-0002-4533-9644 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 6-ENVR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902707 ER PT J AU Nuessle, PR Cadieux, JR AF Nuessle, Patterson R. Cadieux, James R. TI Measuring Po-210/Pb-210 ratios in air samples collected with an electrostatic sampler SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Nuessle, Patterson R.; Cadieux, James R.] Savannah River Natl Lab, Aiken, SC 29808 USA. EM PATTERSON.NUESSLE@SRNL.DOE.GOV; james.cadieux@srnl.doe.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 66-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904550 ER PT J AU Nyman, M Anderson, TM Bontchev, RP AF Nyman, May Anderson, Travis M. Bontchev, Ranko P. TI INOR 437-Role of transition metals in polyoxoniobate chemistry SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Nyman, May; Anderson, Travis M.] Sandia Natl Labs, Albuquerque, NM 87185 USA. [Bontchev, Ranko P.] Cabot SuperiorMicropowders, Albuquerque, NM 87113 USA. EM mdnyman@sandia.gov; tmander@sandia.gov; Ranko_Bontchev@cabot-corp.com NR 0 TC 0 Z9 0 U1 1 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 437-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908803 ER PT J AU O'Dea, JR Bussian, DA Metiu, H Buratto, SK AF O'Dea, James R. Bussian, David A. Metiu, Horia Buratto, Steven K. TI FUEL 19-Nanoscale current imaging of the conducting channels in proton exchange membrane fuel cells SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [O'Dea, James R.; Metiu, Horia; Buratto, Steven K.] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA. [Bussian, David A.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. EM jodea@chem.ucsb.edu; dabus@lanl.gov; metiu@chem.ucsb.edu; buratto@chem.ucsb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 19-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903630 ER PT J AU O'Hara, MJ Egorov, OB Grate, JW AF O'Hara, Matthew J. Egorov, Oleg B. Grate, Jay W. TI Radiochemical sensor system for monitoring Tc-99 in Hanford Site groundwater SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [O'Hara, Matthew J.] Pacific NW Natl Lab, Environm Technol Directorate, Richland, WA 99352 USA. [Egorov, Oleg B.] Isoray Inc, Richland, WA 99354 USA. [Grate, Jay W.] Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. EM matthew.ohara@pnl.gov; oegorov@isoray.com; jwgrate@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 145-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904649 ER PT J AU O'Neill, H Urban, V Luo, GM AF O'Neill, Hugh Urban, Volker Luo, Guangming TI Influence of surface chemistry on the properties of proteins entrapped in functionalized sol-gels SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [O'Neill, Hugh; Urban, Volker; Luo, Guangming] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM urbanvs@ornl.gov; luog@ornl.gov RI Urban, Volker/N-5361-2015 OI Urban, Volker/0000-0002-7962-3408 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 303-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902099 ER PT J AU Ogle, R AF Ogle, Randy TI Development and use of an industrial hygiene sampling method for nanoparticulates SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ogle, Randy] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37931 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 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 28-CHAS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901654 ER PT J AU Olsen, BD Tao, YF Li, XF Toney, MF Wang, J Segalman, RA AF Olsen, Bradley D. Tao, Yuefei Li, Xuefa Toney, Michael F. Wang, Jin Segalman, Rachel A. TI Morphological control for multicomponent organic electronics using rod-coil block copolymers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Olsen, Bradley D.; Segalman, Rachel A.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. [Tao, Yuefei] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. [Toney, Michael F.] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. [Li, Xuefa; Wang, Jin] Argonne Natl Lab, Expt Facil Div, Argonne, IL 60439 USA. EM bdolsen@berkeley.edu; yftao@uclink.berkeley.edu; mftoney@slac.stanford.edu; segalman@berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 5-PMSE PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905450 ER PT J AU Orton, CR Christensen, RN Douglas, M Smith, LE Ressler, JJ Durst, C Schwantes, JM AF Orton, Christopher R. Christensen, Richard N. Douglas, Matthew Smith, L. Eric Ressler, J. J. Durst, C. Schwantes, Jon M. TI Multiisotope approach to process monitoring in reprocessing plants SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Orton, Christopher R.; Christensen, Richard N.] Ohio State Univ, Nucl Engn Program, Dept Mech Engn, Columbus, OH 43210 USA. [Douglas, Matthew; Smith, L. Eric; Ressler, J. J.; Durst, C.; Schwantes, Jon M.] Pacific NW Natl Lab, Richland, WA 99352 USA. EM orton.13@osu.edu; matthew.douglas@pnl.gov; jon.schwantes@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 50-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904577 ER PT J AU Osa, M Mountrichas, G Hong, KL Pispas, S Britt, PF Mays, JW AF Osa, Masashi Mountrichas, Grigoris Hong, Kunlun Pispas, Stergios Britt, Phillip F. Mays, Jimmy W. TI Light scattering study of well-defined flexible polyelectrolytes with two cationic sites per monomeric unit SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Osa, Masashi; Hong, Kunlun; Britt, Phillip F.; Mays, Jimmy W.] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA. [Mountrichas, Grigoris; Pispas, Stergios] Natl Hellen Res Fdn, Inst Theoret & Phys Chem, GR-11635 Athens, Greece. [Hong, Kunlun; Britt, Phillip F.; Mays, Jimmy W.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM osam@ornl.gov; hongkq@ornl.gov; pispas@eie.gr; brittpf@ornl.gov RI nhrf, tpci/M-8699-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 526-PMSE PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905707 ER PT J AU Owen, JS Liu, HT Alivisatos, P AF Owen, Jonathan S. Liu, Haitao Alivisatos, Paul TI INOR 371-The effects of monomer solubility and precursor conversion kinetics on the nucleation of cadmium selenide nanoparticles SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Owen, Jonathan S.; Liu, Haitao; Alivisatos, Paul] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. [Liu, Haitao] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM liuht@berkeley.edu; alivis@uclink4.berkeley.edu NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 371-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909661 ER PT J AU Padilla, A Bustos, G Gomez, R Lugo, J AF Padilla, Adrian Bustos, Glenda Gomez, Richard Lugo, Jerry TI Production control at the LANL plutonium facility SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Padilla, Adrian; Bustos, Glenda; Gomez, Richard; Lugo, Jerry] Los Alamos Natl Lab, PMT 4, Los Alamos, NM 87545 USA. EM adrianp@lanl.gov; glendab@lanl.gov; rgomez@lanl.gov; jlugo@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 7-TECH PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905070 ER PT J AU Page, JS Kelly, RT Marginean, I Tang, KQ Smith, RD AF Page, Jason S. Kelly, Ryan T. Marginean, Ioan Tang, Keqi Smith, Richard D. TI ANYL 435-Increasing the ionization and transmission efficiency in electrospray ionization mass spectrometry using an array of emitters and a multi-inlet interface SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Page, Jason S.; Kelly, Ryan T.; Marginean, Ioan; Tang, Keqi; Smith, Richard D.] Pacific NW Natl Lab, Richland, WA 99352 USA. EM jason.page@pnl.gov; rds@pnl.gov RI Smith, Richard/J-3664-2012; Kelly, Ryan/B-2999-2008 OI Smith, Richard/0000-0002-2381-2349; Kelly, Ryan/0000-0002-3339-4443 NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 435-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901156 ER PT J AU Paglieri, SN Buxbaum, RE Ciocco, MV Howard, B Anderson, IE Terpstra, RL AF Paglieri, Stephen N. Buxbaum, Robert E. Ciocco, Michael V. Howard, Bret Anderson, Iver E. Terpstra, Robert L. TI FUEL 239-Overview of recent hydrogen separating membrane research at Los Alamos National Laboratory SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Paglieri, Stephen N.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA. [Buxbaum, Robert E.] REB Res & Consulting, Ferndale, MI 48220 USA. [Ciocco, Michael V.] NETL Support Contractor Parsons, South Pk, PA 15129 USA. [Howard, Bret] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. [Anderson, Iver E.; Terpstra, Robert L.] Ames Lab, Met & Ceram Sci Program, Ames, IA 50011 USA. EM steve.paglieri@lanl.gov; buxbaum@rebresearch.com; Michael.Ciocco@pp.netl.doe.gov; BRET.HOWARD@netl.doe.gov; andersoni@ameslab.gov; terpstra@ameslab.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 239-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903632 ER PT J AU Pariya, C Sandi, G Back, CK Fronczek, FR Maverick, AW AF Pariya, Chandi Sandi, Giselle Back, Chang-Keun Fronczek, Frank R. Maverick, Andrew W. TI INOR 252-Porous metal-organic molecules and hydrogen storage SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Pariya, Chandi; Fronczek, Frank R.; Maverick, Andrew W.] Louisiana State Univ, Dept Chem, Baton Rouge, LA 70803 USA. [Sandi, Giselle; Back, Chang-Keun] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. EM pariya@lsu.edu; gsandi@anl.gov; ffroncz@lsu.edu; maverick@lsu.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 252-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909685 ER PT J AU Parker, SC Allen, JP Arrouvel, C Kerisit, S Spagnoli, D Gren, W AF Parker, Steve C. Allen, Jeremy P. Arrouvel, Corinne Kerisit, Sebastien Spagnoli, Dino Gren, Wojtek TI PHYS 161-Atomistic simulation of molecular transport, adsorption and growth at mineral surfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Parker, Steve C.; Allen, Jeremy P.; Arrouvel, Corinne; Gren, Wojtek] Univ Bath, Dept Chem, Bath BA2 7AY, Avon, England. [Kerisit, Sebastien] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA. [Spagnoli, Dino] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. EM s.c.parker@bath.ac.uk; sebastien.kerisit@pnl.gov RI Spagnoli, Dino/F-8641-2011; Parker, Steve/C-8180-2011 OI Spagnoli, Dino/0000-0001-6367-4748; Parker, Steve/0000-0003-3804-0975 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 161-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907397 ER PT J AU Passian, A Thundat, T Brown, GM AF Passian, Ali Thundat, Thomas Brown, Gilbert M. TI Receptor-free nanomechanical sensing SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Thundat, Thomas] Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. [Brown, Gilbert M.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM passian@utk.edu; ugt@ornl.gov; browngm1@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 148-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904677 ER PT J AU Paulenova, A Alyapyshev, M Babain, VA Law, JD AF Paulenova, Alena Alyapyshev, Mikhail Babain, Vasiliy A. Law, Jack D. TI Evaluation of group actinide separation using a modified UNEX solvent SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Paulenova, Alena] Oregon State Univ, Ctr Radiat, Corvallis, OR 97331 USA. [Alyapyshev, Mikhail] Oregon State Univ, Ctr Radiat, Corvallis, OR 97330 USA. [Babain, Vasiliy A.] VG Khlopin Radium Inst, St Petersburg 194021, Russia. [Law, Jack D.] Idaho Natl Lab, Aqueous Separat & Radiochem Dept, Idaho Falls, ID 83415 USA. EM paulenoa@engr.orst.edu; alyapymi@engr.orst.edu; babain@atom.nw.ru; jack.Law@inl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 64-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904655 ER PT J AU Payne, RF Metz, LA Engelmann, MD AF Payne, R. F. Metz, L. A. Engelmann, M. D. TI Redox separation of iodide from halides in preparation for TIMS analyses of radioiodine SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Payne, R. F.; Metz, L. A.; Engelmann, M. D.] Pacific NW Natl Lab, Richland, WA 99352 USA. EM rosara.payne@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 112-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904670 ER PT J AU Peterman, DR Greenhalgh, MR Tillotson, RD Klaehn, JR Harrup, MK Luther, TA Law, JD Daniels, LM AF Peterman, Dean R. Greenhalgh, Mitchell R. Tillotson, Richard D. Klaehn, John R. Harrup, Mason K. Luther, Thomas A. Law, Jack D. Daniels, Lee M. TI INOR 539-Separation of minor actinides from lanthanides in acidic media using symmetric and asymmetric dithiophosphinic acid extractants SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Peterman, Dean R.; Greenhalgh, Mitchell R.; Tillotson, Richard D.; Law, Jack D.] Idaho Natl Lab, Aqueous Separat & Radiochem Dept, Idaho Falls, ID 83415 USA. [Klaehn, John R.; Harrup, Mason K.; Luther, Thomas A.] Idaho Natl Lab, Dept Chem Sci, Idaho Falls, ID 83415 USA. [Daniels, Lee M.] Rigaku MSC Inc, The Woodlands, TX 77381 USA. EM dean.peterman@inl.gov; tillrd@inel.gov; john.klaehn@inl.gov; mason.harrup@inl.gov; thomas.luther@inl.gov; Jack.Law@inl.gov; ldaniels@RigakuMSC.com NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 539-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909570 ER PT J AU Peterson, D Gonzales, ER Porterfield, DR AF Peterson, Dominic Gonzales, Edward R. Porterfield, Donivan R. TI Polymeric thin films for extraction and analysis of radioactive analytes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Peterson, Dominic; Gonzales, Edward R.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. [Porterfield, Donivan R.] Los Alamos Natl Lab, Actinide Analyt Chem Grp, Los Alamos, NM 87545 USA. EM dominicp@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 69-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904601 ER PT J AU Peterson, D AF Peterson, Dominic TI AEI 8-Development of analytical separation methods for actinide materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Peterson, Dominic] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. EM dominicp@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 8-AEI PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900049 ER PT J AU Peterson, ES AF Peterson, Eric S. TI Life after graduate school: Working at a national laboratory SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Peterson, Eric S.] Natl Sci Fdn, Idaho Natl Lab, CBET, Idaho Falls, ID 83415 USA. EM eric.peterson@inl.gov RI Peterson, Eric/B-9127-2017 OI Peterson, Eric/0000-0002-2292-4939 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 50-CHED PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904374 ER PT J AU Petkovic, LM Rollins, HW Ginosar, DM Burch, KC AF Petkovic, Lucia M. Rollins, Harry W. Ginosar, Daniel M. Burch, Kyle C. TI INOR 990-Characterization of copper/zinc zeolite composite catalysts with bimodal micro/mesoscopic zeolitic structure SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Petkovic, Lucia M.; Rollins, Harry W.; Ginosar, Daniel M.; Burch, Kyle C.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM Lucia.Petkovic@inl.gov; Harry.Rollins@inl.gov; Kyle.Burch@inl.gov RI Petkovic, Lucia/E-9092-2011; Ginosar, Daniel/C-2357-2017 OI Petkovic, Lucia/0000-0002-0870-3355; Ginosar, Daniel/0000-0002-8522-1659 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 990-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909636 ER PT J AU Petkovic, LM Rollins, HW Ginosar, DM Burch, KC AF Petkovic, Lucia M. Rollins, Harry W. Ginosar, Daniel M. Burch, Kyle C. TI INOR 832-Preparation and characterization of Cu/ZnO loaded carbon nanotube and nanopowder templated zeolites and their catalytic activity for hydrogenating CO and CO2 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Petkovic, Lucia M.; Rollins, Harry W.; Ginosar, Daniel M.; Burch, Kyle C.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM Lucia.Petkovic@inl.gov; Harry.Rollins@inl.gov; Kyle.Burch@inl.gov RI Petkovic, Lucia/E-9092-2011; Rollins, Harry/B-6327-2017; Ginosar, Daniel/C-2357-2017 OI Petkovic, Lucia/0000-0002-0870-3355; Rollins, Harry/0000-0002-3926-7445; Ginosar, Daniel/0000-0002-8522-1659 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 832-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909510 ER PT J AU Petkovic, LM Rollins, HW Ginosar, DM Burch, KC AF Petkovic, Lucia M. Rollins, Harry W. Ginosar, Daniel M. Burch, Kyle C. TI Catalyst characterization and carbon dioxide hydrogenation studies on nanoscale Cu/ZnO catalysts synthesized by a hydrothermal method SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Petkovic, Lucia M.; Rollins, Harry W.; Ginosar, Daniel M.; Burch, Kyle C.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM Lucia.Petkovic@inl.gov; Harry.Rollins@inl.gov; Kyle.Burch@inl.gov RI Petkovic, Lucia/E-9092-2011; Rollins, Harry/B-6327-2017; Ginosar, Daniel/C-2357-2017 OI Petkovic, Lucia/0000-0002-0870-3355; Rollins, Harry/0000-0002-3926-7445; Ginosar, Daniel/0000-0002-8522-1659 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 525-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902366 ER PT J AU Petrik, NG Lane, CD Orlando, T Kimmel, GA AF Petrik, Nikolay G. Lane, Christopher D. Orlando, Thomas Kimmel, Greg A. TI PHYS 286-Electron stimulated desorption and dissociation of thin water films adsorbed on TiO2 (110) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Petrik, Nikolay G.; Kimmel, Greg A.] Pacific NW Natl Lab, Richland, WA 99352 USA. [Lane, Christopher D.; Orlando, Thomas] Georgia Inst Technol, Sch Chem & Biochem, Atlanta, GA 30332 USA. EM Nikolai.Petrik@pnl.gov; christopher.lane@chemistry.gatech.edu; thomas.orlando@chemistry.gatech.edu; gregory.kimmel@pnl.gov RI Petrik, Nikolay/G-3267-2015 OI Petrik, Nikolay/0000-0001-7129-0752 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 286-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907329 ER PT J AU Phair, LW AF Phair, L. W. TI Fission barrier landscape SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Phair, L. W.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. EM lwphair@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 124-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904522 ER PT J AU Pickel, JM Britt, PF Horton, L AF Pickel, Joseph M. Britt, Phillip F. Horton, Linda TI A scientific perspective on the need for and future of nanotechnology SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Pickel, Joseph M.; Britt, Phillip F.; Horton, Linda] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA. [Britt, Phillip F.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM pickeljm@ornl.gov; brittpf@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 7-CHAS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901651 ER PT J AU Pietryga, JM Casson, JL Schaller, RD Klimov, VI Hollingsworth, JA AF Pietryga, Jeffrey M. Casson, Joanna L. Schaller, Richard D. Klimov, Victor I. Hollingsworth, Jennifer A. TI FUEL 284-Cadmium-stabilized lead selenide nanocrystals for use in solar cells SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Pietryga, Jeffrey M.; Casson, Joanna L.; Schaller, Richard D.; Klimov, Victor I.; Hollingsworth, Jennifer A.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. EM pietryga@lanl.gov; casson@lanl.gov; rdsx@lanl.gov; klimov@lanl.gov; jenn@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 284-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903521 ER PT J AU Plionis, AA Peterson, D Gonzales, ER AF Plionis, Alexander A. Peterson, Dominic Gonzales, Edward R. TI Automated flow scintillation analysis of polonium SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Plionis, Alexander A.; Peterson, Dominic; Gonzales, Edward R.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. EM aplionis@lanl.gov; dominicp@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 92-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904602 ER PT J AU Plunkett, KN Godula, K Xiao, SX Nuckolls, CP AF Plunkett, Kyle N. Godula, Kamil Xiao, Shengxiong Nuckolls, Colin P. TI Preparation and application of borylated hexabenzocoronenes in organic devices SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Plunkett, Kyle N.; Xiao, Shengxiong; Nuckolls, Colin P.] Columbia Univ, Dept Chem, New York, NY 10027 USA. [Godula, Kamil] Lawrence Berkeley Natl Lab, Mol Foundry, Biol Nanostructures Facil, Berkeley, CA 94720 USA. EM kp2252@columbia.edu; kgodula@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 463-ORGN PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12JA UT WOS:000207594300669 ER PT J AU Poater, J Huertas, O Fuentes-Cabrera, M Orozco, M Sola, M Luque, FJ AF Poater, Jordi Huertas, Oscar Fuentes-Cabrera, Miguel Orozco, Modesto Sola, Miguel Luque, F. Javier TI ORGN 996-Analysis of the local aromaticity in natural nucleobases and their size-expanded benzo-fused derivatives SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Poater, Jordi] Vrije Univ Amsterdam, Dept Theoret Chem, NL-1081 HV Amsterdam, Netherlands. [Huertas, Oscar] Univ Barcelona, Fac Farm, Dept Fisicoquim, Barcelona 08028, Spain. [Fuentes-Cabrera, Miguel] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. [Fuentes-Cabrera, Miguel] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA. [Orozco, Modesto] Unitat Modelitzacio Mol & Bioinformat, Parc Cientif Barcelona, Inst Recerca Biomed, Barcelona 08024, Spain. [Sola, Miguel] Univ Girona, Inst Quim Computac, Girona 17071, Spain. [Sola, Miguel] Univ Girona, Dept Quim, Girona 17071, Spain. [Luque, F. Javier] Univ Barcelona, Dept Farm, Barcelona, Spain. EM j.poater@few.vu.nl; oscar@mmb.pcb.ub.es; modesto@mmb.pcb.ub.es; miquel.sola@udg.es; fjluque@ub.edu RI Poater, Jordi/B-5028-2009; Sola, Miquel/A-6155-2009; Fuentes-Cabrera, Miguel/Q-2437-2015; Luque, F. Javier/L-9652-2014 OI Poater, Jordi/0000-0002-0814-5074; Sola, Miquel/0000-0002-1917-7450; Fuentes-Cabrera, Miguel/0000-0001-7912-7079; Luque, F. Javier/0000-0002-8049-3567 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 996-ORGN PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12JA UT WOS:000207594300550 ER PT J AU Pratt, LR AF Pratt, Lawrence R. TI PHYS 53-Why not just evaluate the partition function? SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Pratt, Lawrence R.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM lrp@lanl.gov RI Pratt, Lawrence/H-7955-2012 OI Pratt, Lawrence/0000-0003-2351-7451 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 53-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907098 ER PT J AU Rankin, RB Johnson, JK Sholl, DS Tian, HJ Siriwardane, R Campos, A Spivey, JJ Roy, AD AF Rankin, Rees B. Johnson, J. Karl Sholl, David S. Tian, Hanjing Siriwardane, Ranjani Campos, Andrew Spivey, James J. Roy, Amitava D. TI FUEL 83-Computational design of novel sorbent materials for IGCC H2S removal and process intensification SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Rankin, Rees B.; Johnson, J. Karl] Univ Pittsburgh, Dept Chem & Petr Engn, Pittsburgh, PA 15261 USA. [Sholl, David S.] Carnegie Mellon Univ, Dept Chem Engn, Pittsburgh, PA 15213 USA. [Tian, Hanjing; Siriwardane, Ranjani] US DOE, Separat & Fuels Proc Div, Natl Energy Technol Lab, Morgantown, WV USA. [Campos, Andrew; Spivey, James J.] Louisiana State Univ, Dept Chem Engn, Baton Rouge, LA 70803 USA. [Roy, Amitava D.] Louisiana State Univ, Ctr Adv Microstruct & Devices, Baton Rouge, LA 70806 USA. EM karlj@pitt.edu; sholl@andrew.cmu.edu; Ranjani.Siriwardane@NETL.DOE.GOV; acampo2@lsu.edu; jjspivey@lsu.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 83-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903537 ER PT J AU Rashkeev, SN Ginosar, DM Petkovic, LM Farrell, HH AF Rashkeev, Sergey N. Ginosar, Daniel M. Petkovic, Lucia M. Farrell, Helen H. TI FUEL 189-Supported metal particle catalysts for sulfuric acid decomposition reaction: How activity depends on nanoparticle structure, size, and composition SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Rashkeev, Sergey N.; Ginosar, Daniel M.; Petkovic, Lucia M.; Farrell, Helen H.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM Sergey.Rashkeev@inl.gov; Lucia.Petkovic@inl.gov RI Petkovic, Lucia/E-9092-2011; Ginosar, Daniel/C-2357-2017 OI Petkovic, Lucia/0000-0002-0870-3355; Ginosar, Daniel/0000-0002-8522-1659 NR 0 TC 0 Z9 0 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 189-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903594 ER PT J AU Ratajczak, M Ko, C Majewski, J Kjaer, K Lange, Y Steck, T Lee, KYC AF Ratajczak, Maria Ko, Chris Majewski, Jaroslaw Kjaer, Kristian Lange, Yvonne Steck, Theodore Lee, Ka Yee C. TI PHYS 189-Emergence of an active cholesterol state in binary and ternary lipid mixtures SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ratajczak, Maria] Univ Chicago, Dept Phys, Inst Biophys Dynam, Chicago, IL 60637 USA. [Ratajczak, Maria; Lee, Ka Yee C.] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA. [Ko, Chris] Univ Cambridge, Cambridge CB2 1TN, England. [Majewski, Jaroslaw] LANSCE 12, Los Alamos Natl Lab, Los Alamos, NM 87544 USA. [Kjaer, Kristian] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. [Lange, Yvonne] Rush Univ Med Ctr, Dept Pathol, Chicago, IL 60612 USA. [Steck, Theodore] Univ Chicago, Dept Biochem & Mol Biol, Chicago, IL 60637 USA. [Lee, Ka Yee C.] Univ Chicago, Dept Chem, Inst Biophys Dynam, Chicago, IL 60637 USA. EM mkratajczak@gmail.com; ytck2@cam.ac.uk; jarek@lanl.gov; kristian.kjaer@nbi.ku.dk; Yvonne_Lange@rush.edu; t-steck@uchicago.edu; kayeelee@uchicago.edu RI Lujan Center, LANL/G-4896-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 189-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907488 ER PT J AU Ratliff, AE DeVol, T DiPrete, DP AF Ratliff, Amy E. DeVol, Timothy DiPrete, David P. TI Development of a colorimetric test for quantification of uranium in drinking water SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ratliff, Amy E.; DeVol, Timothy] Clemson Univ, Dept Environm Engn & Sci, Anderson, SC 29625 USA. [DiPrete, David P.] Westinghouse Savannah River Co, Savannah River Technol Ctr, Analyt Dev, Aiken, SC 29808 USA. EM aeratli@clemson.edu; tim.devol@ces.clemson.edu; david.diprete@srs.gov RI Hixon, Amy/D-4608-2016 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 47-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904604 ER PT J AU Ratto, TV Loui, A Wilson, TS McCall, SK Mukerjee, EV Hart, BR AF Ratto, Timothy V. Loui, Albert Wilson, Thomas S. McCall, Scott K. Mukerjee, Erik V. Hart, Bradley R. TI COLL 9-Chemical detection with robust polyolefin-coated cantilever arrays SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ratto, Timothy V.; Loui, Albert; Wilson, Thomas S.; McCall, Scott K.; Mukerjee, Erik V.; Hart, Bradley R.] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 97550 USA. EM hart14@llnl.gov RI McCall, Scott/G-1733-2014 OI McCall, Scott/0000-0002-7979-4944 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 9-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902469 ER PT J AU Ray, R Ekechukwu, AA Langford, W AF Ray, Robert Ekechukwu, Amy A. Langford, Willie TI Free hydroxide characterization of high level nuclear waste at the Savannah River Site SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ekechukwu, Amy A.] Washington Savannah River Co, Savannah River Natl Lab, Aiken, SC 29808 USA. [Langford, Willie] Savannah River Co, Analyt Labs, WSRC, Aiken, SC 29808 USA. EM robert02.ray@srnl.doe.gov; willie.langford@srs.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 153-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904617 ER PT J AU Reinhard, M Montgomery-Brown, J Behrens, S Campbell, JA Ding, WH AF Reinhard, Martin Montgomery-Brown, John Behrens, Sebastian Campbell, James A. Ding, Wang-Hsien TI Subsurface alkylphenolethoxylate transformation pathways: Who's responsible and how? SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Reinhard, Martin; Montgomery-Brown, John; Behrens, Sebastian] Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA. [Campbell, James A.] Pacific NW Natl Lab, Richland, WA 99352 USA. [Ding, Wang-Hsien] Natl Cent Univ, Dept Chem, Chungli 32001, Taiwan. EM reinhard@stanford.edu; jmb@stanford.edu; wding0224@yahoo.com.tw NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 68-ENVR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902669 ER PT J AU Rickert, PG Dietz, ML Firestone, MA Wishart, JF Szreder, T Kubatko, KA Antonio, MR AF Rickert, Paul G. Dietz, Mark L. Firestone, Millicent A. Wishart, James F. Szreder, Tomasz Kubatko, Karrie-Ann Antonio, M. R. TI INOR 904-Tetraalkylphosphonium polyoxometalate ionic liquids: Synthesis and characterization SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Rickert, Paul G.; Dietz, Mark L.; Antonio, M. R.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. [Firestone, Millicent A.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. [Wishart, James F.; Szreder, Tomasz] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. [Kubatko, Karrie-Ann] Univ Miami, Dept Geol Sci, Coral Gables, FL 33146 USA. EM mdietz@anl.gov; firestone@anl.gov; wishart@bnl.gov; tomaszek@bnl.gov; kkubatko@miami.edu; mantonio@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 904-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909169 ER PT J AU Ripp, S Fleming, J Melechko, AV Doktycz, MJ Sayler, GS AF Ripp, Steven Fleming, James Melechko, Anatoli V. Doktycz, Mitchel J. Sayler, Gary S. TI AGRO 130-Nanostructured bacteriophage reporter system for the detection of bacterial pathogens SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ripp, Steven; Fleming, James] Univ Tennessee, Ctr Environm Biotechnol, Knoxville, TN 37996 USA. [Melechko, Anatoli V.] Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. [Doktycz, Mitchel J.] Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37831 USA. [Sayler, Gary S.] Univ Tennessee, Dept Microbiol, Knoxville, TN 37996 USA. [Sayler, Gary S.] Univ Tennessee, Ctr Environm Biotechnol, Knoxville, TN 37996 USA. EM saripp@utk.edu RI Ripp, Steven/B-2305-2008 OI Ripp, Steven/0000-0002-6836-1764 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 130-AGRO PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900404 ER PT J AU Robinson, D Simmons, BA Zuckermann, RN AF Robinson, David Simmons, Blake A. Zuckermann, Ronald N. TI POLY 265-Toward artificial diatoms: Structure-function studies of oligoamine-induced silica condensation SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Simmons, Blake A.] Sandia Natl Labs, Dept Chem Mat, Livermore, CA 94551 USA. [Zuckermann, Ronald N.] Univ Calif Berkeley, Lawrence Berkeley Lab, Biol Nanostruct Lab, Mol Foundry, Berkeley, CA 94720 USA. EM drobins@sandia.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 265-POLY PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908677 ER PT J AU Rodriguez, JA AF Rodriguez, Jose A. TI CATL 17-Water-gas shift on metal nanoparticles supported on well-defined surfaces: Active phase and reaction mechanism SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Rodriguez, Jose A.] Brookhaven Natl Lab, Upton, NY 11973 USA. EM rodrigez@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 17-CATL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900848 ER PT J AU Roensch, FR LaMont, SP Steiner, RE AF Roensch, Fred R. LaMont, Stephen P. Steiner, Robert E. TI Analytical improvements in radiochemical processing of in vitro bioassay samples SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Roensch, Fred R.; LaMont, Stephen P.; Steiner, Robert E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM froensch@lanl.gov; lamont@lanl.gov; steiner@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 114-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904643 ER PT J AU Rollins, HW Petkovic, LM Ginosar, DM Burch, KC AF Rollins, Harry W. Petkovic, Lucia M. Ginosar, Daniel M. Burch, Kyle C. TI INOR 363-Hydrothermal preparation of nanoscale alcohol synthesis catalysts SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Rollins, Harry W.; Petkovic, Lucia M.; Ginosar, Daniel M.; Burch, Kyle C.] Idaho Natl Lab, Chem Sci, Idaho Falls, ID 83415 USA. EM Harry.Rollins@inl.gov; Lucia.Petkovic@inl.gov; dmg@inel.gov; Kyle.Burch@inl.gov RI Petkovic, Lucia/E-9092-2011; Rollins, Harry/B-6327-2017; Ginosar, Daniel/C-2357-2017 OI Petkovic, Lucia/0000-0002-0870-3355; Rollins, Harry/0000-0002-3926-7445; Ginosar, Daniel/0000-0002-8522-1659 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 363-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909438 ER PT J AU Romanini, DW Hooker, JM O'Neil, JP Francis, MB AF Romanini, Dante W. Hooker, Jacob M. O'Neil, J. P. Francis, Matthew B. TI ORGN 971-Virus capsid-based materials for medical imaging SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Romanini, Dante W.; Hooker, Jacob M.; Francis, Matthew B.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. [O'Neil, J. P.] Lawrence Berkeley Natl Lab, Div Life Sci, Berkeley, CA 94720 USA. EM dante@berkeley.edu; jmhooker@berkeley.edu; francis@cchem.berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 971-ORGN PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12JA UT WOS:000207594300728 ER PT J AU Rosso, KM Kerisit, S Valiev, M Smith, DMA Deskins, NA Yanina, SV Wigginton, NS Straatsma, TP Dupuis, M AF Rosso, Kevin M. Kerisit, Sebastien Valiev, Marat Smith, Dayle M. A. Deskins, N. Aaron Yanina, Svetlana V. Wigginton, Nicholas S. Straatsma, T. P. Dupuis, Michel TI PHYS 247-Computational bioelectrochemistry for cytochrome-electrode interfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Rosso, Kevin M.; Kerisit, Sebastien; Deskins, N. Aaron; Dupuis, Michel] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA. [Valiev, Marat] Environm Mol Sci Lab, Richland, WA 99352 USA. [Smith, Dayle M. A.] Whitman Coll, Dept Phys, Walla Walla, WA 99362 USA. [Wigginton, Nicholas S.] Virginia Polytech Inst & State Univ, Dept Geosci, NanoGeosci & Technol Lab, Blacksburg, VA 24061 USA. [Straatsma, T. P.] Pacific NW Natl Lab, Computat Sci & Math Div, Richland, WA 99352 USA. EM kevin.rosso@pnl.gov; sebastien.kerisit@pnl.gov; marat.valiev@pnl.gov; smithdm@whitman.edu; nathaniel.deskins@pnl.gov; wigginto@vt.edu; tps@pnl.gov; michel.dupuis@pnl.gov RI Wigginton, Nicholas/F-1747-2011 OI Wigginton, Nicholas/0000-0001-9161-6131 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 247-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907288 ER PT J AU Ryan, JD Clark, DS AF Ryan, Jessica D. Clark, Douglas S. TI CATL 49-P450 biocatalysis in two-phase emulsions using biomimetic NADH SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ryan, Jessica D.] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. [Clark, Douglas S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM jessryan@berkeley.edu; clark@cchem.berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 49-CATL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900807 ER PT J AU Ryan, KC Herbst, RW Bryngelson, PA Guce, AIA Doddi, CL Brunold, TC Cabelli, DE Garman, SC Maroney, MJ AF Ryan, Kelly C. Herbst, Robert W. Bryngelson, Peter A. Guce, Abigail Ida A. Doddi, Cecilia L. Brunold, Thomas C. Cabelli, Diane E. Garman, Scott C. Maroney, Michael J. TI Structure and mechanism in NiSOD SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Ryan, Kelly C.; Herbst, Robert W.; Bryngelson, Peter A.; Doddi, Cecilia L.; Maroney, Michael J.] Univ Massachusetts, Dept Chem, Amherst, MA 01002 USA. [Guce, Abigail Ida A.; Garman, Scott C.] Univ Massachusetts, Dept Biochem & Mol Biol, Amherst, MA 01003 USA. [Brunold, Thomas C.] Univ Wisconsin, Dept Chem, Madison, WI 53706 USA. [Cabelli, Diane E.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM kcryan@chem.umass.edu; herbstr@chem.umass.edu; pbryngel@gmail.com; brunold@chem.wisc.edu; cabelli@bnl.gov; mmaroney@chem.umass.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 760-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909593 ER PT J AU Satyapal, S Read, C Ordaz, G Thomas, G Petrovic, J AF Satyapal, Sunita Read, Carole Ordaz, Grace Thomas, George Petrovic, John TI FUEL 102-Status of vehicular hydrogen storage SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Satyapal, Sunita; Read, Carole; Ordaz, Grace] US DOE, Off Hydrogen Fuel Cells & Infrastruct Technol, Washington, DC 20585 USA. [Thomas, George] Sandia Natl Labs, Off Hydrogen Fuel Cells & Infrastruct Technol, Washington, DC 20585 USA. [Petrovic, John] Los Alamos Natl Lab, Cape Canaveral, FL 32920 USA. EM sunita.satyapal@ee.doe.gov; johnpetrovic@earthlink.net NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 102-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903601 ER PT J AU Schaller, RD Sykora, M Pietryga, JM Jeong, S Klimov, VI AF Schaller, Richard D. Sykora, Milan Pietryga, Jeffrey M. Jeong, Sohee Klimov, Victor I. TI Generation of multiple excitons from absorption of a single photon in nanocrystal quantum dots SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schaller, Richard D.; Sykora, Milan; Pietryga, Jeffrey M.; Jeong, Sohee; Klimov, Victor I.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM rdsx@lanl.gov; sykoram@lanl.gov; pietryga@lanl.gov; klimov@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 285-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903732 ER PT J AU Schanze, KS Keller, JR Glusac, KD Danilov, EO McIlroy, S Sreearunotha, P Miller, JR AF Schanze, Kirk S. Keller, Julia R. Glusac, Ksenija D. Danilov, Evgeny O. McIlroy, Sean Sreearunotha, Paiboon Miller, John R. TI POLY 317-Platinum-acetylide oligomers: Triplet exciton and negative polaron structure and dynamics SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schanze, Kirk S.; Keller, Julia R.] Univ Florida, Dept Chem, Gainesville, FL 32611 USA. [Schanze, Kirk S.; Keller, Julia R.] Univ Florida, Ctr Macromol Sci & Engn, Gainesville, FL 32611 USA. [Glusac, Ksenija D.] Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA. [Danilov, Evgeny O.] Bowling Green State Univ, Ohio Lab Kinet Spectrometry, Bowling Green, OH 43403 USA. [McIlroy, Sean; Sreearunotha, Paiboon; Miller, John R.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM kschanze@chem.ufl.edu; jraymer@ufl.edu; kglusac@bgsu.edu; smcilroy@bnl.gov; jrmiller@bnl.gov RI Schanze, Kirk/A-7200-2009 OI Schanze, Kirk/0000-0003-3342-4080 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 317-POLY PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908245 ER PT J AU Scharff, RJ McGrane, SD AF Scharff, R. Jason McGrane, Shawn D. TI COLL 230-2-D Infrared spectroscopy of Si-H bond dynamics in a-Si:H SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Scharff, R. Jason; McGrane, Shawn D.] Los Alamos Natl Lab, Dynam & Energet Mat Div, Los Alamos, NM 87545 USA. EM scharff@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 230-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902243 ER PT J AU Schelter, EJ Veauthier, JM Scott, B John, KD Thompson, JD Morris, DE Kiplinger, JL AF Schelter, Eric J. Veauthier, Jacqueline M. Scott, Brian John, Kevin D. Thompson, J. D. Morris, David E. Kiplinger, Jaqueline L. TI INOR 960-f-Element magnetochemistry: From lanthanides to actinides, molecules to materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Scott, Brian] Los Alamos Natl Lab, Div Mat Phys & Applicat, Los Alamos, NM 87545 USA. RI Schelter, Eric/E-2962-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 960-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908842 ER PT J AU Schenter, GK Mundy, CJ Dang, LX AF Schenter, Gregory K. Mundy, Christopher J. Dang, Liem X. TI COMP 453-EXAFS analysis of aqueous interfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schenter, Gregory K.; Mundy, Christopher J.; Dang, Liem X.] Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA. EM greg.schenter@pnl.gov; chris.mundy@pnl.gov; liem.dang@pnl.gov 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 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 453-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906103 ER PT J AU Schneider, WF Xiao, L Lin, WG Xu, Y AF Schneider, William F. Xiao, Li Lin, Wenguang Xu, Ye TI COLL 80-Metal-support interactions in realistic environments SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schneider, William F.; Xiao, Li] Univ Notre Dame, Dept Chem & Biomol Engn, Notre Dame, IN 46556 USA. [Lin, Wenguang] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA. [Xu, Ye] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA. [Xu, Ye] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM wschneider@nd.edu; lxiao1@nd.edu; wlin1@nd.edu; xuy2@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 80-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902277 ER PT J AU Schrier, J Lee, B Wang, LW AF Schrier, Joshua Lee, Byounghak Wang, Lin-Wang TI INOR 485-Mechanical and electronic properties of semiconductor nanocrystalline tetrapods SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schrier, Joshua; Lee, Byounghak; Wang, Lin-Wang] Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA. EM jschrier@lbl.gov; lwwang@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 485-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909500 ER PT J AU Schrier, J Atahan, S Wang, LW Aspuru-Guzik, A AF Schrier, Joshua Atahan, Sule Wang, Lin-Wang Aspuru-Guzik, Alan TI COMP 49-Air-stable, high performance, rigid [:4,5]thieno[2,3-d]thiophene-derivative organic semiconductors SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schrier, Joshua; Wang, Lin-Wang] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA. [Atahan, Sule; Aspuru-Guzik, Alan] Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA. EM jschrier@lbl.gov; atahan@fas.harvard.edu; lwwang@lbl.gov; aspuru@chemistry.harvard.edu RI Atahan-Evrenk, Sule /D-4736-2012 OI Atahan-Evrenk, Sule /0000-0002-4905-3491 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 49-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906318 ER PT J AU Schrier, J AF Schrier, Joshua TI AEI 49-Simulating nanostructure photovoltaics from atoms to devices SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schrier, Joshua] Univ Calif Berkeley, Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA. EM jschrier@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 49-AEI PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900044 ER PT J AU Schultz, PA AF Schultz, Peter A. TI COMP 434-Is the band gap problem truly a problem: Defects in semiconductors SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schultz, Peter A.] Sandia Natl Labs, Multiscale Dynam Mat Modeling Dept 1435, Albuquerque, NM 87185 USA. EM paschul@sandia.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 434-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906116 ER PT J AU Schwartz, M Culp, JT Smith, MR Bockrath, BC AF Schwartz, Michael Culp, Jeffrey T. Smith, Milton R. Bockrath, Bradley C. TI FUEL 174-Metal-organic-framework-based membranes for the separation of light gases SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schwartz, Michael; Culp, Jeffrey T.; Smith, Milton R.; Bockrath, Bradley C.] US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. EM Michael.Schwartz@netl.doe.gov; Jeffrey.Culp@PP.NETL.DOE.GOV; Milton.Smith@NETL.DOE.GOV; Bradley.Bockrath@NETL.DOE.GOV NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 174-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903519 ER PT J AU Schwartz, M AF Schwartz, Michael TI AEI 73-Inorganic and solid state materials for energy applications SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Schwartz, Michael] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. EM mschw790@yahoo.com NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 73-AEI PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900020 ER PT J AU Scott, JR Kotler, JM Hinman, NW Yan, BZ Stoner, DL Richardson, CD AF Scott, Jill R. Kotler, J. Michelle Hinman, Nancy W. Yan, Beizhan Stoner, Daphne L. Richardson, C. Doc TI GEOC 62-Detecting biosignatures associated with minerals using GALDI-FTMS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Scott, Jill R.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. [Kotler, J. Michelle; Hinman, Nancy W.; Richardson, C. Doc] Univ Montana, Dept Geosci, Missoula, MT 59812 USA. [Yan, Beizhan; Stoner, Daphne L.] Univ Idaho Idaho Falls, Dept Chem, Idaho Falls, ID 83402 USA. EM jill.scott@inl.gov; nancy.hinman@umontana.edu; stondl@if.uidaho.edu RI Scott, Jill/G-7275-2012 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 62-GEOC PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902762 ER PT J AU Seibert, M AF Seibert, M. TI CATL 19-Algal biohydrogen production from water: A future renewable energy option SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Seibert, M.] Chem & Biosci Ctr, Natl Renewable Energy Lab, Golden, CO 80401 USA. EM mike_seibert@nrel.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 19-CATL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900844 ER PT J AU Seliskar, CJ Heineman, WR Bryan, S Del Negro, AS AF Seliskar, Carl J. Heineman, William R. Bryan, Sam Del Negro, Andrew S. TI Fluorescence-based sensor for pertechnetate SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Seliskar, Carl J.; Heineman, William R.] Univ Cincinnati, Dept Chem, Cincinnati, OH 45221 USA. [Bryan, Sam] Pacific NW Natl Lab, Radiochem Proc Lab, Richland, WA 99352 USA. EM carl.seliskar@uc.edu; heinemwr@ucmail.uc.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 144-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904559 ER PT J AU Sellevag, SR Georgievskii, Y Miller, JA AF Sellevag, Stig R. Georgievskii, Yuri Miller, James A. TI PHYS 416-Computational study of the reactions OH + O ' HO2 ' H+O2 and H + OH ' H2O SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Sellevag, Stig R.] SINTEF Energy Res, NO-7465 Trondheim, Norway. [Georgievskii, Yuri; Miller, James A.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. EM Stig.R.Sellevag@sintef.no; ygeorgi@sandia.gov; jamille@sandia.gov NR 0 TC 0 Z9 0 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 416-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907227 ER PT J AU Shamsi, A AF Shamsi, Abolghasem TI FUEL 223-Partial oxidation of methane and the effect of sulfur on catalytic activity and selectivity SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Shamsi, Abolghasem] US DOE, NETL, Morgantown, WV 26505 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 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 223-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903524 ER PT J AU Sharma, S Meagley, RP AF Sharma, Shalini Meagley, Robert P. TI COLL 193-Siloxane based adhesion promoting photo-acid and photo-base generators and their application in DUV, EUV and E-beam lithography SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Sharma, Shalini] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. [Meagley, Robert P.] Intel Corp, Components Res, Hillsboro, OR 97124 USA. EM ssharma@lbl.gov; robert.p.meagley@intel.com NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 193-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902461 ER PT J AU Shkrob, I Elles, CG Crowell, RA AF Shkrob, Ilya Elles, Christopher G. Crowell, Robert A. TI PHYS 556-Solvated electron and solvated atom SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Shkrob, Ilya; Elles, Christopher G.; Crowell, Robert A.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. EM shkrob@anl.gov; elles@anl.gov; rob_crowell@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 556-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907172 ER PT J AU Shreve, AP Buschmann, WE Brown, MG Dattelbaum, AM Rocha, RC Montano, GA Wang, HL AF Shreve, Andrew P. Buschmann, Wayne E. Brown, Mac G. Dattelbaum, Andrew M. Rocha, Reginaldo C. Montano, Gabriel A. Wang, Hsing-Lin TI PHYS 109-Spectroscopy of low-dimensional materials with tunable behavior SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Shreve, Andrew P.] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA. [Brown, Mac G.] Los Alamos Natl Lab, Decis Applicat Div, Los Alamos, NM 87545 USA. [Dattelbaum, Andrew M.; Rocha, Reginaldo C.; Montano, Gabriel A.; Wang, Hsing-Lin] Los Alamos Natl Lab, Mat Phys & Applicat Div, Los Alamos, NM 87545 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 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 109-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907183 ER PT J AU Shuh, DK Tyliszczak, T Nico, PS Daehn, R AF Shuh, D. K. Tyliszczak, Tolek Nico, Peter S. Daehn, Rainer TI Soft X-ray scanning transmission spectromicroscopy of actinide materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Shuh, D. K.; Tyliszczak, Tolek; Nico, Peter S.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Daehn, Rainer] Paul Scherrer Inst, Lab Waste Management, CH-5232 Villigen, Switzerland. EM dkshuh@lbl.gov; psnico@lbl.gov; rainer.daehn@psi.ch RI Nico, Peter/F-6997-2010 OI Nico, Peter/0000-0002-4180-9397 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 132-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904591 ER PT J AU Sigg, RA Odell, DMC AF Sigg, R. A. Odell, D. M. C. TI Evaluation of a new scintillator for neutron detection in hand-held RIID instruments SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Sigg, R. A.; Odell, D. M. C.] Savannah River Natl Lab, Aiken, SC 29808 USA. EM raymond.sigg@srnl.doe.gov; ken.odell@srnl.doe.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 91-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904600 ER PT J AU Small, YA Davenport, JW AF Small, Yolanda A. Davenport, James W. TI PHYS 443-Molecular dynamics simulations of cellulose degrading enzymes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Small, Yolanda A.; Davenport, James W.] Brookhaven Natl Lab, Computat Sci Ctr, Upton, NY 11973 USA. EM ysmall@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 443-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907534 ER PT J AU Smith, RD Tang, KQ Belov, ME Page, JS Kelly, RT Marginean, I AF Smith, Richard D. Tang, Keqi Belov, Mikhail E. Page, Jason S. Kelly, Ryan T. Marginean, Ioan TI ANYL 352-Advancing the sensitivity, quality, and throughput of mass spectrometry measurements for highly complex biological mixtures SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Smith, Richard D.; Tang, Keqi; Belov, Mikhail E.; Page, Jason S.; Kelly, Ryan T.; Marginean, Ioan] Pacific NW Natl Lab, Richland, WA 99352 USA. EM rds@pnl.gov; jason.page@pnl.gov RI Smith, Richard/J-3664-2012; Kelly, Ryan/B-2999-2008 OI Smith, Richard/0000-0002-2381-2349; Kelly, Ryan/0000-0002-3339-4443 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 352-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901124 ER PT J AU Smith, T Slipchenko, LV Gordon, MS AF Smith, Toni Slipchenko, Lyudmila V. Gordon, Mark S. TI COMP 449-Effective fragment potential modeling of substituted benzene dimers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Smith, Toni; Slipchenko, Lyudmila V.] Iowa State Univ Sci & Technol, Dept Chem, Ames, IA 50011 USA. [Gordon, Mark S.] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. EM toni@si.fi.ameslab.gov; lyuda@si.fi.ameslab.gov; mark@si.fi.ameslab.gov RI Slipchenko, Lyudmila/G-5182-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 449-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906135 ER PT J AU Soderholm, L Skanthakumar, S Antonio, MR AF Soderholm, L. Skanthakumar, S. Antonio, M. R. TI Synchrotron studies of actinide speciation in solution SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Soderholm, L.; Skanthakumar, S.; Antonio, M. R.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. EM LS@ANL.gov; mantonio@anl.gov NR 0 TC 1 Z9 1 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 131-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904664 ER PT J AU Sok, S Gordon, MS AF Sok, Sarom Gordon, Mark S. TI COMP 413-Theoretical study on the hydrolysis mechanism of 1-substituted silatranes in the gas phase SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Gordon, Mark S.] Iowa State Univ, Scalable Comp Lab, Dept Chem, Ames, IA 50011 USA. [Gordon, Mark S.] Ames Lab, Ames, IA 50011 USA. EM sarom@si.fi.ameslab.gov; mark@si.fi.ameslab.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 413-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906220 ER PT J AU Sok, S Gordon, MS AF Sok, Sarom Gordon, Mark S. TI COMP 95-Multiconfigurational study of tetrasilacyclobutadiene cobalt complex SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Gordon, Mark S.] Iowa State Univ, Scalable Comp Lab, Dept Chem, Ames, IA 50011 USA. [Gordon, Mark S.] Ames Lab, Ames, IA 50011 USA. EM sarom@si.fi.ameslab.gov; mark@si.fi.ameslab.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 95-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906222 ER PT J AU Somorjai, GA York, RL AF Somorjai, G. A. York, Roger L. TI ANYL 392-The structure, amount adsorbed, and vibrational spectra of 7-14 amino acid peptides on hydrophobic and hydrophilic surfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Somorjai, G. A.; York, Roger L.] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. [Somorjai, G. A.; York, Roger L.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM somorjai@socrates.berkeley.edu; rogyork@berkeley.edu NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 392-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901416 ER PT J AU Spraggins, J Robinson, S Laskin, J Johnston, MV Ridge, DP AF Spraggins, Jeff Robinson, Scott Laskin, Julia Johnston, M. V. Ridge, Douglas P. TI ANYL 350-Gas phase conformations and decomposition mechanisms of activated modified peptides SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Spraggins, Jeff; Robinson, Scott; Johnston, M. V.; Ridge, Douglas P.] Univ Delaware, Dept Chem & Biochem, Lammot Dupont Lab 106, Newark, DE 19716 USA. [Laskin, Julia] Pacific NW Natl Lab, Richland, WA 99352 USA. EM dougr@chem.delaware.edu; Julia.Laskin@pnl.gov; dougr@udel.edu RI Ridge, Douglas/A-7539-2013 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 350-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901435 ER PT J AU Srinivasan, B Croatto, P Neuhoff, J Goldberg, S Narayanan, U Mason, P AF Srinivasan, B. Croatto, Paul Neuhoff, Jon Goldberg, Steven Narayanan, Usha Mason, Peter TI Radiochronometry standards SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Srinivasan, B.; Croatto, Paul; Neuhoff, Jon; Goldberg, Steven; Narayanan, Usha; Mason, Peter] New Brunswick Lab, Dept Energy, Argonne, IL 60439 USA. EM b.srinivasan@ch.doe.gov; paul.croatto@ch.doe.gov; usha.narayanan@ch.doe.gov NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 65-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904638 ER PT J AU Steckel, JA AF Steckel, Janice A. TI Computational studies of mercury adsorption on metal surfaces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Steckel, Janice A.] Parsons Projects Inc, Natl Energy Technol Lab, Pittsburgh, PA 15236 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 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 127-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902358 ER PT J AU Stevens, MJ AF Stevens, Mark J. TI COMP 210-Simulations of water interfacial behavior SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Stevens, Mark J.] Sandia Natl Labs, Albuquerque, NM 87185 USA. EM msteve@sandia.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 210-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906072 ER PT J AU Stewart, FF Klaehn, JR Orme, CJ AF Stewart, Frederick F. Klaehn, John R. Orme, Christopher J. TI POLY 605-Membrane transport behavior and the lability of chloride on polyphosphazenes bearing bulky substituents SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Stewart, Frederick F.; Klaehn, John R.; Orme, Christopher J.] Idaho Natl Lab, Dept Chem Sci, Idaho Falls, ID 83415 USA. EM frederick.stewart@inl.gov; john.klaehn@inl.gov; christopher.orme@inl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 605-POLY PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908124 ER PT J AU Storr, T Wasinger, EC Pratt, RC Stack, TDP AF Storr, Tim Wasinger, Erik C. Pratt, Russell C. Stack, T. Daniel P. TI INOR 815-Investigation of the locus of oxidation and spectroscopic features of oxidized metal salen complexes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Storr, Tim; Stack, T. Daniel P.] Stanford Univ, Dept Chem, Stanford, CA 94305 USA. [Wasinger, Erik C.] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. [Pratt, Russell C.] IBM Almaden Res Ctr, San Jose, CA 95120 USA. EM tstorr@stanford.edu; wasinger@anl.gov; rcpratt@us.ibm.com; stack@stanford.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 815-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909172 ER PT J AU Stoyer, MA AF Stoyer, Mark A. TI Superheavy elements and radioactive ion beams SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Stoyer, Mark A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM stoyer1@llnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 101-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904618 ER PT J AU Strader, ML Yang, A Johns, J Muller, E Harris, CB AF Strader, Matthew L. Yang, Aram Johns, James Muller, Eric Harris, Charles B. TI PHYS 383-Ultrafast, interfacial electron dynamics of the 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide/Ag(111) interface SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Strader, Matthew L.; Yang, Aram; Johns, James; Muller, Eric; Harris, Charles B.] Univ Calif Berkeley, Div Chem Sci, Berkeley, CA 94720 USA. [Strader, Matthew L.; Yang, Aram; Johns, James; Muller, Eric; Harris, Charles B.] Univ Calif Berkeley, Dept Chem, EO Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM straderm@xenon.cchem.berkeley.edu; ayang@xenon.cchem.berkeley.edu; jej7x@xenon.cchem.berkeley.edu; muller@xenon.cchem.berkeley.edu RI Muller, Eric/J-2161-2012 OI Muller, Eric/0000-0002-9629-1767 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 383-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907554 ER PT J AU Strohm, JJ King, DL Wang, XQ Singh, P Recknagle, K Wang, Y AF Strohm, James J. King, David L. Wang, Xianqin Singh, Prabhakar Recknagle, Kurt Wang, Yong TI FUEL 185-Effects of activity and deactivation of NiYSZ SOFC anodes on thermal profiles during internal reforming of methane SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Strohm, James J.; King, David L.; Wang, Xianqin; Singh, Prabhakar; Recknagle, Kurt; Wang, Yong] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA. EM james.strohm@pnl.gov; david.king@pnl.gov; yongwang@pnl.gov RI Wang, Yong/C-2344-2013 NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 185-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903656 ER PT J AU Subramanian, KH Wiersma, BJ AF Subramanian, K. H. Wiersma, B. J. TI Review of corrosion inhibition in Department of Energy high-level waste tanks SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Subramanian, K. H.; Wiersma, B. J.] Savannah River Natl Lab, Aiken, SC 29808 USA. EM karthik.subramanian@srnl.doe.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 152-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904674 ER PT J AU Sulchek, TA Bourguet, FA Coleman, MA Loui, A Ratto, TV Hart, BR AF Sulchek, Todd A. Bourguet, Feliza A. Coleman, Matthew A. Loui, Albert Ratto, Timothy V. Hart, Bradley R. TI COLL 2-Cantilever-based detection of pathogens using multiple biological signatures SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Sulchek, Todd A.; Bourguet, Feliza A.; Coleman, Matthew A.; Loui, Albert; Ratto, Timothy V.; Hart, Bradley R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM todds@llnl.gov; bourguetl@llnl.gov; coleman16@llnl.gov; loui2@llnl.gov; ratto7@llnl.gov; hart14@llnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 2-COLL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593902438 ER PT J AU Sun, YA Zhang, LH Zhou, HW Zhu, YM Sutter, E Rafailovich, M Sokolov, J AF Sun, Yuan Zhang, Lihua Zhou, Hongwen Zhu, Yimei Sutter, Eli Rafailovich, Miriam Sokolov, Jonathan TI INOR 135-Highly crystalline rectangular palladium nanoparticles: Colloidal synthesis and electron microscopy studies SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Sun, Yuan; Rafailovich, Miriam; Sokolov, Jonathan] SUNY Stony Brook, Dept Mat Sci & Engn, Stony Brook, NY 11794 USA. [Zhang, Lihua; Zhu, Yimei; Sutter, Eli] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. [Zhou, Hongwen] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. EM yuasun@ic.sunysb.edu; lhzhang@bnl.gov; hozhou@ic.sunysb.edu; zhu@bnl.gov; esutter@bnl.gov; miriam.rafailovich@sunysb.edu; jonathan.sokolov@sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 135-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908794 ER PT J AU Surdoval, WA AF Surdoval, Wayne A. TI The U. S. Department of Energy Fossil Energy Fuel Cell Program: Goals and challenges SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Surdoval, Wayne A.] US DOE, Natl Energy Technol Lab, Strateg Ctr Nat Gas, Pittsburgh, PA 15236 USA. EM Wayne.Surdoval@NETL.DOE.GOV NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 51-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903748 ER PT J AU Sykora, M Petruska, MA Alstrum-Acevedo, JH Leonard, J Meyer, TJ Klimov, V AF Sykora, Milan Petruska, Melissa A. Alstrum-Acevedo, James H. Leonard, Jason Meyer, Thomas J. Klimov, Victor TI Interfacial energy and charge transfer in assemblies consisting of CdSe nanocrystal quantum dots and Ru-polypyridine complexes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Sykora, Milan; Petruska, Melissa A.; Leonard, Jason; Klimov, Victor] Los Alamos Natl Lab, Los Alamos, NM 87544 USA. [Alstrum-Acevedo, James H.; Meyer, Thomas J.] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA. EM sykoram@lanl.gov; alstruma@email.unc.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 286-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903743 ER PT J AU Tegrotenhuis, W Lavender, CA Stenkamp, VS Roberts, BQ Weil, SK AF Tegrotenhuis, Ward Lavender, Curt A. Stenkamp, Victoria S. Roberts, Benjamin Q. Weil, Scott K. TI FUEL 48-Passive microchannel humidifier for PEM fuel cell water management SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Tegrotenhuis, Ward; Lavender, Curt A.; Stenkamp, Victoria S.; Roberts, Benjamin Q.; Weil, Scott K.] Pacific NW Natl Lab, Richland, WA 99352 USA. EM ward.tegrotenhuis@pnl.gov; victoria.stenkamp@pnl.gov; benjamin.roberts@pnl.gov; scott.weil@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 48-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903693 ER PT J AU Tegrotenhuis, W Brooks, KP Dagle, RA Holladay, J King, DL Palo, D Roberts, BQ AF Tegrotenhuis, Ward Brooks, Kriston P. Dagle, Robert A. Holladay, Jamie King, David L. Palo, Daniel Roberts, Benjamin Q. TI FUEL 251-Reducing water demand and improving hydrogen yield of fuel processors using differential temperature water-gas shift SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Tegrotenhuis, Ward; Brooks, Kriston P.; Dagle, Robert A.; Holladay, Jamie; King, David L.; Palo, Daniel; Roberts, Benjamin Q.] Pacific NW Natl Lab, Richland, WA 99352 USA. EM ward.tegrotenhuis@pnl.gov; kriston.brooks@pnl.gov; robert.dagle@pnl.gov; david.king@pnl.gov; benjamin.roberts@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 251-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903694 ER PT J AU Thackeray, MM AF Thackeray, Michael M. TI ANYL 26-Chemical storage - cathodes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Thackeray, Michael M.] Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA. EM thackeray@cmt.anl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 26-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901087 ER PT J AU Thomas, M Lall-Ramnarine, SI Wishart, JF Engel, R AF Thomas, Marie Lall-Ramnarine, Sharon I. Wishart, James F. Engel, Robert TI I&EC 47-Investigation of ionic liquids based on diphenyl phosphate SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Thomas, Marie; Engel, Robert] CUNY Queens Coll, Dept Chem & Biochem, Flushing, NY 11367 USA. [Thomas, Marie; Engel, Robert] CUNY, Grad Ctr, Dept Chem & Biochem, Flushing, NY 11367 USA. [Lall-Ramnarine, Sharon I.] CUNY Queensborough Community Coll, Dept Chem, Bayside, NY 11364 USA. [Wishart, James F.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM slallramnarine@qcc.cuny.edu; wishart@bnl.gov; robert_engel@qc.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 47-IEC PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903833 ER PT J AU Thompson, SW Fjeld, RA Kaplan, DI AF Thompson, Shannon W. Fjeld, Robert A. Kaplan, Daniel I. TI Bridging the gap between field studies of radionuclide mobility and lab sorption data SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Thompson, Shannon W.; Fjeld, Robert A.] Clemson Univ, Dept Environm Engn & Sci, Anderson, SC 29625 USA. [Kaplan, Daniel I.] Westinghouse Savannah River Co, Savannah River Natl Lab, Aiken, SC 29808 USA. EM SWThomp@clemson.edu; fjeld@clemson.edu; daniel.kaplan@srs.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 48-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904639 ER PT J AU Tsai, MK Kowalski, K Valiev, M Garrett, BC AF Tsai, Ming-Kang Kowalski, Karol Valiev, Marat Garrett, Bruce C. TI PHYS 574-Microsolvated OH(H2O)n cluster based approach of studying vapor/liquid interface SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Tsai, Ming-Kang; Garrett, Bruce C.] Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. [Kowalski, Karol] Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. EM mbrad.tsai@pnl.gov; karol.kowalski@pnl.gov; marat.valiev@pnl.gov; bruce.garrett@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 574-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907504 ER PT J AU Tur, C Heger, A Austin, SM Wuosmaa, A AF Tur, Clarisse Heger, Alexander Austin, Sam M. Wuosmaa, Alan TI Experimental uncertainties of helium burning reactions and astrophysical implications SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Tur, Clarisse; Austin, Sam M.] Michigan State Univ, Natl Superconducting Cyclotron Lab, Cyclotron Lab 1, E Lansing, MI 48824 USA. [Heger, Alexander] Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA. [Wuosmaa, Alan] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. EM tur@nscl.msu.edu; alex@ucolick.org; austin@nscl.msu.edu; alan.wuosmaa@wmich.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 80-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904547 ER PT J AU Urena, K Thomas, M Wishart, JF Lall-Ramnarine, SI AF Urena, Katherine Thomas, Marie Wishart, James F. Lall-Ramnarine, Sharon I. TI Physical properties of phosphate ionic liquids SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Urena, Katherine; Lall-Ramnarine, Sharon I.] CUNY Queensborough Community Coll, Dept Chem, Bayside, NY 11364 USA. [Thomas, Marie] CUNY Queens Coll, Flushing, NY 11367 USA. [Thomas, Marie] CUNY, Grad Ctr, Flushing, NY 11367 USA. [Wishart, James F.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM kathyurena@gmail.com; wishart@bnl.gov; slallramnarine@qcc.cuny.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 247-CHED PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904434 ER PT J AU Valiev, M Kowalski, K AF Valiev, Marat Kowalski, Karol TI PHYS 695-Finite temperature excited states of cytosine base in the native DNA environment SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Valiev, Marat] Environm Mol Sci Lab, Richland, WA 99352 USA. [Kowalski, Karol] Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. EM marat.valiev@pnl.gov; karol.kowalski@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 695-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907326 ER PT J AU Valiev, M Kowalski, K AF Valiev, Marat Kowalski, Karol TI PHYS 179-Merging high-level coupled cluster methods with classical molecular dynamics simulations for accurate calculations of thermally averaged ground and excited state properties in large chemical systems SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Valiev, Marat; Kowalski, Karol] Pacific NW Natl Lab, WR Wiley Environm Mol Sci Lab, Richland, WA 99352 USA. EM marat.valiev@pnl.gov; karol.kowalski@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 179-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907321 ER PT J AU Valiev, M Weare, JH Adams, JA Taylor, SS AF Valiev, Marat Weare, John H. Adams, Joseph A. Taylor, Susan S. TI BIOL 177-Catalytic mechanism of cAMP-dependent protein kinase SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Valiev, Marat] Pacif NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99352 USA. [Adams, Joseph A.] Univ Calif San Diego, Dept Pharmacol, La Jolla, CA 92093 USA. [Taylor, Susan S.] Univ Calif San Diego, Howard Hughes Med Inst, Dept Chem & Biochem, La Jolla, CA 92093 USA. EM marat.valiev@pnl.gov; jweare@ucsd.edu; joeadams@ucsd.edu; staylor@ucsd.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 177-BIOL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593900703 ER PT J AU Valone, SM Atlas, SR AF Valone, Steven M. Atlas, Susan R. TI PHYS 36-Potential energy surfaces from spectral representations SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Valone, Steven M.] Los Alamos Natl Lab, MST8, MS G755, Los Alamos, NM 87545 USA. [Atlas, Susan R.] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA. [Atlas, Susan R.] Univ New Mexico, Ctr Adv Studies, Albuquerque, NM 87131 USA. EM smv@lanl.gov; susie@sapphire.phys.unm.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 36-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907443 ER PT J AU Van Stipdonk, MJ Groenewold, GS Gresham, GL Kullman, M Oomens, J AF Van Stipdonk, Michael J. Groenewold, Gary S. Gresham, Garold L. Kullman, Michael Oomens, Jos TI INOR 323-Vibrational spectroscopy of gas-phase uranyl-hydrogen sulfate complex ions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Van Stipdonk, Michael J.; Kullman, Michael] Wichita State Univ, Dept Chem, Wichita, KS 67260 USA. [Groenewold, Gary S.; Gresham, Garold L.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. [Oomens, Jos] FOM Inst Plasma Phys Rijnhuizen, NL-3439 MN Nieuwegein, Netherlands. EM mike.vanstipdonk@wichita.edu; gary.groenewold@inl.gov; garold.gresham@inl.gov; mjkullman@wichita.edu; joso@rijnh.nl RI Oomens, Jos/F-9691-2015 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 323-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909696 ER PT J AU Varma, S Rempe, SB AF Varma, Sameer Rempe, Susan B. TI PHYS 102-Quantum-chemical investigations of ion selectivity mechanisms by K-channels and Valinomycin SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Varma, Sameer; Rempe, Susan B.] Sandia Natl Labs, Computat Biosci Dept, Albuquerque, NM 87185 USA. EM svarma@sandia.gov; slrempe@sandia.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 102-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907338 ER PT J AU Veauthier, JM Schelter, EJ Scott, BL Thompson, JD Hay, PJ John, KD Morris, DE Kiplinger, JL AF Veauthier, Jacqueline M. Schelter, Eric J. Scott, Brian L. Thompson, J. D. Hay, P. J. John, Kevin D. Morris, D. E. Kiplinger, Jaqueline L. TI INOR 538-New multimetallic complexes of thorium and uranium SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Veauthier, Jacqueline M.; Schelter, Eric J.; Scott, Brian L.; Thompson, J. D.; Hay, P. J.; John, Kevin D.; Morris, D. E.; Kiplinger, Jaqueline L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM pjhay@lanl.gov RI Schelter, Eric/E-2962-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 538-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909137 ER PT J AU Veld, PJI Ismail, AE Grest, GS AF Veld, Pieter J. In 't Ismail, Ahmed E. Grest, Gary S. TI COMP 6-Application of Ewald summations to long-range dispersion forces SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Veld, Pieter J. In 't; Ismail, Ahmed E.; Grest, Gary S.] Sandia Natl Labs, Albuquerque, NM 87185 USA. EM aismail@sandia.gov; gsgrest@sandia.gov NR 0 TC 0 Z9 0 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 6-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906217 ER PT J AU Visco, S AF Visco, Steve TI ANYL 25-Fundamental research needs in chemical storage SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Visco, Steve] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM sjvisco@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 25-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901351 ER PT J AU Volz, HM Dunwoody, JT Tandon, L McCabe, RJ FitzPatrick, JR Hackenberg, RE AF Volz, Heather M. Dunwoody, John T. Tandon, Lav McCabe, Rodney J. FitzPatrick, John R. Hackenberg, Robert E. TI Examples of the usefulness of X-ray powder diffraction to characterize uranium compounds SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Volz, Heather M.; Dunwoody, John T.; Tandon, Lav; McCabe, Rodney J.; FitzPatrick, John R.; Hackenberg, Robert E.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 129-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904562 ER PT J AU Voter, AF AF Voter, Arthur F. TI COMP 192-Recent advances and ongoing challenges in accelerated molecular dynamics methods SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Voter, Arthur F.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM afv@lanl.gov NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 192-COMP PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593906187 ER PT J AU Wall, NA Clark, SB Hull, LC AF Wall, Nathalie A. Clark, Sue B. Hull, Laurence C. TI Sorption on uranyl silicates SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wall, Nathalie A.; Clark, Sue B.] Washington State Univ, Dept Chem, Pullman, WA 99164 USA. [Hull, Laurence C.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM nawall@wsu.edu; laurence.hull@inl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 157-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904659 ER PT J AU Wang, LQ Zhou, XD Yao, CH Windisch, CF Pederson, LR Exarhos, GJ AF Wang, Li-Qiong Zhou, Xiao-Dong Yao, Chunhua Windisch, Charles F. Pederson, Larry R. Exarhos, Gregory J. TI INOR 951-Probing hydrogen in ZnO nanorods using solid-state 1H NMR SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wang, Li-Qiong; Windisch, Charles F.; Exarhos, Gregory J.] Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99354 USA. [Zhou, Xiao-Dong; Pederson, Larry R.] Pacific NW Natl Lab, Energy Sci & Technol Div, Richland, WA 99354 USA. [Yao, Chunhua] Brown Univ, Dept Chem, Providence, RI 02912 USA. EM lq.wang@pnl.gov NR 0 TC 0 Z9 0 U1 2 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 951-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593908702 ER PT J AU Wang, LQ Pawsey, S Moudrakovski, I Rowsell, JLC Exarhos, GJ Ripmeester, J Yaghi, OM Shin, Y AF Wang, Li-Qiong Pawsey, Shane Moudrakovski, Igor Rowsell, Jesse L. C. Exarhos, Gregory J. Ripmeester, John Yaghi, Omar M. Shin, Yongsoon TI Hyperpolarized 129Xe nuclear magnetic resonance investigation of molecularly organized nanostructural materials SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wang, Li-Qiong; Exarhos, Gregory J.; Shin, Yongsoon] Fundamental Sci Div, Pacific NW Natl Lab, Richland, WA 99354 USA. [Rowsell, Jesse L. C.] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA. [Yaghi, Omar M.] Univ Calif Los Angeles, Dept Chem, Los Angeles, CA 90024 USA. EM lq.wang@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 345-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907035 ER PT J AU Wang, Q Newton, MD AF Wang, Qian Newton, Marshall D. TI PHYS 533-Structure and electronic coupling element of the TCNE/TCNE-center dot association in solution u A polarizable continuum model study SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wang, Qian; Newton, Marshall D.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM wangq@bnl.gov; Newton@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 533-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907306 ER PT J AU Wang, ZM Zachara, JM Chang, HS Korshin, G Senko, JM Burgos, WD Wang, JM AF Wang, Zheming Zachara, John M. Chang, Hyun-Shik Korshin, Gregory Senko, John M. Burgos, William D. Wang, Jiamin TI Cryogenic laser-induced time-resolved fluorescence spectroscopy studies of uranium adsorbed at minerals and soil sediments SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wang, Zheming; Zachara, John M.] Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. [Chang, Hyun-Shik; Korshin, Gregory] Univ Washington, Dept Civil & Environm Engn, Seattle, WA 98195 USA. [Senko, John M.] Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16803 USA. [Burgos, William D.] Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA. [Wang, Jiamin] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM zheming.wang@pnl.gov; hschang@u.washington.edu; korshin@u.washington.edu; senko@engr.psu.edu; bburgos@psu.edu NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 147-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904614 ER PT J AU Weinkauf, DH Hickner, M AF Weinkauf, D. H. Hickner, Michael TI FUEL 70-Plasma surface modification of carbon catalyst support systems to enhnace PEM fuel cell performance SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Weinkauf, D. H.] New Mexico Inst Min & Technol, Dept Petr & Chem Engn, Socorro, NM 87801 USA. [Hickner, Michael] Sandia Natl Labs, Chem & Biol Syst Dept, Albuquerque, NM 87185 USA. EM weinkauf@nmt.edu; mahickn@sandia.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 70-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903670 ER PT J AU Whitfield, TW Lamoureux, G Varma, S Rempe, SB Roux, B AF Whitfield, Troy W. Lamoureux, Guillaume Varma, Sameer Rempe, Susan B. Roux, Benoit TI PHYS 541-Computational models of ion hydration SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Whitfield, Troy W.] Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. [Lamoureux, Guillaume] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA. [Varma, Sameer] Sandia Natl Labs, Computat Biosci Dept, Albuquerque, NM 87185 USA. [Rempe, Susan B.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. [Roux, Benoit] Univ Chicago, Dept Biochem & Mol Biol, Chicago, IL 60637 USA. EM twhitfie@mcs.anl.gov; svarma@sandia.gov; rempe@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 541-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907666 ER PT J AU Whitten, WB Zhao, Z Meyer, KA Shaw, RW AF Whitten, William B. Zhao, Zhi Meyer, Kent A. Shaw, Robert W. TI Analytical entanglements SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Whitten, William B.; Zhao, Zhi; Meyer, Kent A.; Shaw, Robert W.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM whittenwb@ornl.gov; shawrw@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 357-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901226 ER PT J AU Wiedeking, M Fallon, P Macchiavelli, AO Phair, LW Clark, RM Cromaz, M Deleplanque, MA Gibelin, JD Lee, IY McMahan, MA Moretto, LG Rodriguez-Vieitez, E Bernstein, LA Bleuel, DL Burke, JT Lyles, BF Volya, A AF Wiedeking, M. Fallon, P. Macchiavelli, A. O. Phair, L. W. Clark, R. M. Cromaz, M. Deleplanque, M-A. Gibelin, J. D. Lee, I-Y. McMahan, M. A. Moretto, L. G. Rodriguez-Vieitez, E. Bernstein, L. A. Bleuel, D. L. Burke, J. T. Lyles, B. F. Volya, A. TI Neutron-rich A similar to 15 nuclei produced in fusion-evaporation reactions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wiedeking, M.; Clark, R. M.; Gibelin, J. D.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94702 USA. [Fallon, P.; Macchiavelli, A. O.; Phair, L. W.; Cromaz, M.; Deleplanque, M-A.; Lee, I-Y.; McMahan, M. A.; Moretto, L. G.; Rodriguez-Vieitez, E.] LBNL, Berkeley, CA 94702 USA. [Bernstein, L. A.; Burke, J. T.] LLNL, Livermore, CA 94550 USA. [Bleuel, D. L.; Lyles, B. F.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Volya, A.] FSU, Tallahassee, FL 32306 USA. EM MWiedeking@lbl.gov; bleuel1@llnl.gov RI Volya, Alexander/I-9457-2012 OI Volya, Alexander/0000-0002-1765-6466 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 42-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904556 ER PT J AU Wilkerson, MP Berg, JM Boland, KS Wolfsberg, LE AF Wilkerson, Mariane P. Berg, John M. Boland, Kevin S. Wolfsberg, Laura E. TI Near-infrared fluorescence emission from Pu(VI)O2Cl4 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wilkerson, Mariane P.; Boland, Kevin S.; Wolfsberg, Laura E.] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. [Berg, John M.] Los Alamos Natl Lab, Actinide Fuel Cycle Technol Grp, Los Alamos, NM 87545 USA. EM mpw@lanl.gov; jberg@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 55-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904572 ER PT J AU Williams, DK Ayub, H AF Williams, Diane K. Ayub, Hina TI ANYL 90-Detection of explosives by hyperspectral imaging SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Williams, Diane K.] Fed Bur Invest Acad, Lab Div, Quantico, VA 22135 USA. [Ayub, Hina] Oak Ridge Inst Sci & Educ, Lab Div, Quantico, VA 22135 USA. EM dkwilliams@fbiacademy.edu; hayub@fbiacademy.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 90-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901002 ER PT J AU Wilson, RM Bergman, RG Ellman, JA AF Wilson, Rebecca M. Bergman, Robert G. Ellman, Jonathan A. TI ORGN 383-Asymmetric cyclization of nitrogen-containing heterocycles via catalytic C-H bond activation SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Div Chem Sci, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM bergman@cchem.berkeley.edu; jellman@berkeley.edu RI Ellman, Jonathan/C-7732-2013 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 383-ORGN PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12JA UT WOS:000207594300207 ER PT J AU Winans, RE AF Winans, Randall E. TI Coal structure and reactivity: A physical organic chemistry approach SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Winans, Randall E.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA. EM rewinans@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 39-PETR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904771 ER PT J AU Winans, RE AF Winans, Randall E. TI FUEL 235-Approach to provide samples for basic research: Argonne premium coals SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Winans, Randall E.] Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA. EM rewinans@anl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 235-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903697 ER PT J AU Wojcik, MD Phillips, MC Golovich, EC Cannon, BD Ozanich, RM Grate, JW AF Wojcik, M. D. Phillips, M. C. Golovich, E. C. Cannon, B. D. Ozanich, R. M. Grate, J. W. TI Gas phase photoacoustic spectroscopy in the long-wave IR using quartz tuning forks and amplitude modulated quantum cascade lasers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wojcik, M. D.; Phillips, M. C.; Golovich, E. C.; Cannon, B. D.; Ozanich, R. M.; Grate, J. W.] Pacific NW Natl Lab, Richland, WA 99354 USA. EM michael.wojcik@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 143-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904673 ER PT J AU Worley, CG AF Worley, Christopher G. TI Recent developments in a dried residue specimen preparation method for quantifying analytes in plutonium metal by X-ray fluorescence SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Worley, Christopher G.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM cworley@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 128-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904521 ER PT J AU Wu, H Liu, GD Wang, J Lin, YH AF Wu, Hong Liu, Guodong Wang, Jun Lin, Yuehe TI ANYL 49-Electrochemical immunoassay based on quantum-dot labels for sensitive detection of protein biomarkers SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wu, Hong; Liu, Guodong; Wang, Jun; Lin, Yuehe] Pacific NW Natl Lab, Richland, WA 99352 USA. EM hong.wu@pnl.gov; yuehe.lin@pnl.gov RI Lin, Yuehe/D-9762-2011 OI Lin, Yuehe/0000-0003-3791-7587 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 49-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901345 ER PT J AU Wunderlich, B AF Wunderlich, Bernhard TI Fifty-year development of the understanding of motion and defects in macromolecular crystals based on thermal analysis, structure analysis and computer simulation SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wunderlich, Bernhard] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. [Wunderlich, Bernhard] Oak Ridge Natl Lab, Knoxville, TN 37996 USA. EM Wunderlich@CharterTN.net NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 39-PMSE PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905358 ER PT J AU Wuosmaa, AH Rehm, KE Goodman, N Janssens, RVF Jisonna, L Lighthall, JC Marley, ST Pardo, RC Pieper, SC Schiffer, JP Segel, RE Siemssen, RH Wiringa, RB AF Wuosmaa, Alan H. Rehm, K. Ernst Goodman, Nicholas Janssens, Robert V. F. Jisonna, L. Lighthall, Jonathon C. Marley, Scott T. Pardo, R. C. Pieper, S. C. Schiffer, J. P. Segel, Ralph E. Siemssen, Rolf H. Wiringa, R. B. TI Properties of 7He from single nucleon transfer reactions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wuosmaa, Alan H.; Goodman, Nicholas; Lighthall, Jonathon C.; Marley, Scott T.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. [Rehm, K. Ernst; Janssens, Robert V. F.; Pardo, R. C.; Pieper, S. C.; Schiffer, J. P.; Wiringa, R. B.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. [Jisonna, L.; Segel, Ralph E.] Northwestern Univ, Dept Phys, Evanston, IL 60208 USA. [Siemssen, Rolf H.] Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands. EM alan.wuosmaa@wmich.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 44-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904608 ER PT J AU Wyman, CE Yang, B Dale, BE Elander, R Holtzapple, M Ladisch, MR Lee, YY Mitchinson, C Saddler, JN AF Wyman, Charles E. Yang, Bin Dale, Bruce E. Elander, Richard Holtzapple, Mark Ladisch, Michael R. Lee, Y. Y. Mitchinson, Colin Saddler, John N. TI BIOT 119-Comparative hydrolysis, fermentation, and economic information for application of leading pretreatment technologies to corn stover and poplar SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Wyman, Charles E.] Univ Calif Riverside, Riverside, CA 92521 USA. [Yang, Bin] Univ Calif Riverside, Ctr Environm Res & Technol, Riverside, CA 92507 USA. [Dale, Bruce E.] Michigan State Univ, Dept Chem Engn & Mat Sci, E Lansing, MI 48824 USA. [Elander, Richard] Natl Renewable Energy Lab, Golden, CO 80401 USA. [Holtzapple, Mark] Texas A&M Univ, Dept Chem Engn, College Stn, TX 77843 USA. [Ladisch, Michael R.] Purdue Univ, Lab Renewable Resources Engn Dept, Potter Engn Ctr, W Lafayette, IN 47907 USA. [Lee, Y. Y.] Auburn Univ, Dept Chem Engn, Auburn, AL 36849 USA. [Mitchinson, Colin] Genencor Int, Palo Alto, CA 94304 USA. [Saddler, John N.] Univ British Columbia, Forest Sci Ctr, Vancouver, BC V6T 1Z4, Canada. EM cewyman@engr.ucr.edu; binyang@cert.ucr.edu; bdale@egr.msu.edu; Richard_Elander@nrel.gov; m-holtzapple@tamu.edu; ladisch@purdue.edu; leeyoon@auburn.edu; colin.mitchinson@danisco.com; saddler@interchange.ubc.ca RI Saddler, Jack (John)/A-9103-2013 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 119-BIOT PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903143 ER PT J AU Xantheas, SS AF Xantheas, Sotiris S. TI PHYS 563-The elusive structure of H3O+(H2O)20 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Xantheas, Sotiris S.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA. EM sotiris.xantheas@pnl.gov RI Xantheas, Sotiris/L-1239-2015 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 563-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907436 ER PT J AU Xantheas, SS Fanourgakis, GS AF Xantheas, Sotiris S. Fanourgakis, George S. TI PHYS 241-Development of a transferable interaction potential for water from first principles: Extension of the TTM potential (version 3.0) to describe the vibrational spectra of water clusters and the liquid SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Xantheas, Sotiris S.; Fanourgakis, George S.] Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA. EM sotiris.xantheas@pnl.gov; george.fanourgakis@pnl.gov RI Xantheas, Sotiris/L-1239-2015 NR 7 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 241-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907435 ER PT J AU Xiao, YM Guo, YS Wang, HX George, SJ Cramer, SP AF Xiao, Yuming Guo, Yisong Wang, Hongxin George, Simon J. Cramer, Stephen P. TI INOR 870-Nuclear resonance vibrational spectroscopy on nitrogenase SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Xiao, Yuming; Guo, Yisong; Wang, Hongxin] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. [George, Simon J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. [Cramer, Stephen P.] UC Davis Lawrence Berkeley Natl Lab, Dept Appl Sci, Berkeley, CA 94720 USA. EM yxiao@ucdavis.edu; ysguo@ucdavis.edu; hongxin@popper.lbl.gov; spcramer@ucdavis.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 870-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909149 ER PT J AU Xu, CS Cang, H Montiel, D Yang, H AF Xu, C. Shan Cang, Hu Montiel, Daniel Yang, Haw TI INOR 137-Real-time sizing of nanoparticles in solution with 3-D single-particle tracking SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Xu, C. Shan; Montiel, Daniel; Yang, Haw] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. [Cang, Hu] Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA. EM hucang@gmail.com; hawyang@berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 137-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909279 ER PT J AU Yang, P Batista, ER Tretiak, S Saxena, AB Martin, RL Smith, DL AF Yang, Ping Batista, Enrique R. Tretiak, Sergei Saxena, Avadh B. Martin, Richard L. Smith, Darryl L. TI Probing morphological effects of OLED using first principle calculations SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Yang, Ping; Batista, Enrique R.; Tretiak, Sergei; Saxena, Avadh B.; Martin, Richard L.; Smith, Darryl L.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM pyang@lanl.gov; erb@lanl.gov; serg@lanl.gov; avadh@lanl.gov; rlmartin@lanl.gov; dsmith@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 7-PMSE PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905739 ER PT J AU Yang, P Batista, ER Hay, PJ Martin, RL Carlson, CN Clark, DL Conradson, SD Kozimor, SA Schwarz, DE Wilkerson, MP AF Yang, Ping Batista, Enrique R. Hay, P. Jeffrey Martin, Richard L. Carlson, Christin N. Clark, David L. Conradson, Steven D. Kozimor, Stosh A. Schwarz, Daniel E. Wilkerson, Marinne P. TI Quantification of covalency in An-Cl bonds SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Yang, Ping; Batista, Enrique R.; Hay, P. Jeffrey; Martin, Richard L.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. [Carlson, Christin N.; Clark, David L.; Conradson, Steven D.; Kozimor, Stosh A.; Schwarz, Daniel E.; Wilkerson, Marinne P.] Los Alamos Natl Lab, ADSMS, Seaborg Inst, Los Alamos, NM 87545 USA. EM pyang@lanl.gov; erb@lanl.gov; pjhay@lanl.gov; rlmartin@lanl.gov; conradson@lanl.gov; stosh@lanl.gov; mpw@lanl.gov NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 120-NUCL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904633 ER PT J AU Youmans, LD Brisson, MJ Bernard, M Langford, W Jones, MA AF Youmans, Linda D. Brisson, Michael J. Bernard, Maureen Langford, Willie Jones, Mark A. TI INOR 89-Measuring trace level beryllium, lead, and hexavalent chromium in radioactive contaminated samples SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Youmans, Linda D.; Langford, Willie] Savannah River Co, WSRC, Analyt Labs, Aiken, SC 29808 USA. [Brisson, Michael J.] SRS, WSRC, Analyt Lab, Aiken, SC 29808 USA. [Bernard, Maureen] Washington Savannah River Co, Savannah River Site, Analyt Labs Dept, Aiken, SC 29808 USA. [Jones, Mark A.] SRS, WSRC, Savannah River Natl Lab, Aiken, SC 29808 USA. EM linda.youmans@srs.gov; mike.brisson@srs.gov; maureen.bernard@srs.gov; willie.langford@srs.gov; mark02jones@srs.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 89-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909095 ER PT J AU Zeng, WG Barabanschikov, A Zhang, YB Sage, JT Alp, EE Sturhahn, W Zhao, JY AF Zeng, Weiqiao Barabanschikov, Alexander Zhang, Yunbin Sage, J. Timothy Alp, E. Ercan Sturhahn, Wolfgang Zhao, Jiyong TI PHYS 386-Vibrational spectroscopy study of myoglobin compound II SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zeng, Weiqiao; Barabanschikov, Alexander; Zhang, Yunbin; Sage, J. Timothy] Northeastern Univ, Boston, MA 02115 USA. [Alp, E. Ercan; Sturhahn, Wolfgang; Zhao, Jiyong] Argonne Natl Lab, Argonne, IL 60439 USA. RI Zeng, Weiqiao/F-7628-2013; Barabanschikov, Alexander/L-3048-2013 OI Zeng, Weiqiao/0000-0002-0577-932X; NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 386-PHYS PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907661 ER PT J AU Zhang, F Mao, YB Wong, SS AF Zhang, Fen Mao, Yuanbing Wong, Stanislaus S. TI INOR 638-Ambient template-directed synthesis of single-crystalline alkaline earth metal fluoride nanowires SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhang, Fen; Mao, Yuanbing; Wong, Stanislaus S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. [Wong, Stanislaus S.] Brookhaven Natl Lab, Dept Mat Sci, Stony Brook, NY 11794 USA. EM fezhang@ic.sunysb.edu; ymao@ic.sunysb.edu; sswong@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 638-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909604 ER PT J AU Zhang, F Wong, SS AF Zhang, Fen Wong, Stanislaus S. TI INOR 949-General room-temperature synthesis of single-crystalline antiferromagnetic perovskite fluoride nanorods SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhang, Fen; Wong, Stanislaus S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. [Wong, Stanislaus S.] Brookhaven Natl Lab, Dept Mat Sci, Stony Brook, NY 11794 USA. EM fezhang@ic.sunysb.edu; sswong@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 949-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909573 ER PT J AU Zhang, H Yeung, ES AF Zhang, Hui Yeung, Edward S. TI CARB 82-Linkage position and nonreducing end residues (glucose, galactose, and mannose) determination of disaccharides by graphite assisted laser desorption/ionization and tandem mass spectrometry SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Iowa State Univ, Ames Lab, US DOE, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. EM huizh@iastate.edu; yeung@ameslab.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 82-CARB PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901531 ER PT J AU Zhang, H Yeung, ES AF Zhang, Hui Yeung, Edward S. TI ANYL 434-Linkage position and non-reducing end residues (glucose, galactose, and mannose) determination of disaccharides by graphite assisted laser desorption/ionization and tandem mass spectrometry SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. EM huizh@iastate.edu; yeung@ameslab.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 434-ANYL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901324 ER PT J AU Zhang, Y Grass, ME Habas, SE Tao, F Zhang, TF Borodko, Y Yang, PD Somorjai, GA AF Zhang, Yawen Grass, Michael E. Habas, Susan E. Tao, Feng Zhang, Tianfu Borodko, Yuri Yang, Peidong Somorjai, G. A. TI INOR 138-Size-tunable monodisperse rhodium nanocrystals with catalytically active (111) surface structures SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM ywzhang@berkeley.edu; pyang@cchem.berkeley.edu; Somorjai@berkeley.edu NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 138-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909127 ER PT J AU Zhang, ZC Zhao, H Holladay, JE AF Zhang, Z. Conrad Zhao, Haibo Holladay, Johnathan E. TI Novel catalysts for carbohydrate conversion to 5-hydroxymethylfurfural SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhang, Z. Conrad; Zhao, Haibo; Holladay, Johnathan E.] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA. EM conrad.zhang@pnl.gov; john.holladay@pnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 59-PETR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593904741 ER PT J AU Zhang, ZC Zhao, HB Holladay, JE Brown, H AF Zhang, Z. Conrad Zhao, Haibo Holladay, Johnathan E. Brown, Heather TI CARB 124-Novel catalysts for sugar conversion to 5-hydroxymethylfurfural SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhang, Z. Conrad; Zhao, Haibo; Holladay, Johnathan E.; Brown, Heather] Pacific NW Natl Lab, Inst Interfacial Catalysis, Richland, WA 99352 USA. EM conrad.zhang@pnl.gov; john.holladay@pnl.gov NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 124-CARB PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593901486 ER PT J AU Zhao, DC Liu, G Saiz, E Tomsia, AP AF Zhao, Dacheng Liu, Gao Saiz, Eduardo Tomsia, Antoni P. TI Hydrogel-based biodegradable bone replacement material SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhao, Dacheng; Liu, Gao; Saiz, Eduardo; Tomsia, Antoni P.] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM dzhao@lbl.gov; gliu@lbl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 422-PMSE PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593905579 ER PT J AU Zhao, H Baker, GA Song, ZY Olubajo, O Peters, D Goins, E Crittle, T AF Zhao, Hua Baker, Gary A. Song, Zhiyan Olubajo, Olarongbe Peters, Darkeysha Goins, Elliott Crittle, Tanisha TI Can ionic liquids dissolve cellulose but not deactivate enzymes? SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhao, Hua; Song, Zhiyan; Olubajo, Olarongbe; Peters, Darkeysha; Goins, Elliott; Crittle, Tanisha] Savannah State Univ, Chem Program, Savannah, GA 31404 USA. [Baker, Gary A.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM bakerga1@ornl.gov NR 0 TC 0 Z9 0 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 101-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903726 ER PT J AU Zhao, X Chen, S Chen, J Chen, JG Ojima, I AF Zhao, Xianrui Chen, Shuyi Chen, Jin Chen, Jingyi Ojima, Iwao TI MEDI 326-Synthesis and application of fluorescence-labeled biotin-taxoid conjugate for the investigation into efficacious tumor-targeting drug delivery system SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhao, Xianrui; Chen, Shuyi; Chen, Jin] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. [Chen, Jingyi] Brookhaven Natl Lab, Dept Condense Matter Phys & Mat Sci, Upton, NY 11973 USA. [Ojima, Iwao] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. [Ojima, Iwao] SUNY Stony Brook, ICB&DD, Stony Brook, NY 11794 USA. EM xizhao@ic.sunysb.edu; shcchen@ic.sunysb.edu; jinchen2@ic.sunysb.edu; chenj@bnl.gov; iojima@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 326-MEDI PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593907754 ER PT J AU Zhao, XY Jia, HF Kim, J Wang, P AF Zhao, Xueyan Jia, Hongfei Kim, Jungbae Wang, Ping TI FUEL 194-Biocatalysis of carbon nanotube-attached enzymes for biofuel cells SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhao, Xueyan; Wang, Ping] Univ Minnesota, Dept Bioprod & Biosyst Engn, St Paul, MN 55108 USA. [Jia, Hongfei] Univ Akron, Dept Chem Engn, Akron, OH 44325 USA. [Kim, Jungbae] Pacific NW Natl Lab, Richland, WA 99352 USA. EM zhaox179@umn.edu; hj2@uakron.edu; Jungbae.Kim@pnl.gov; ping@umn.edu NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 194-FUEL PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593903611 ER PT J AU Zhou, HJ Park, TJ Wong, SS AF Zhou, Hongjun Park, Tae-Jin Wong, Stanislaus S. TI INOR 620-Synthesis, characterization, and photocatalytic properties of pyrochlore Bi2Ti2O7 nanotubes SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhou, Hongjun; Park, Tae-Jin; Wong, Stanislaus S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. [Wong, Stanislaus S.] Brookhaven Natl Lab, Dept Mat Sci, Stony Brook, NY 11794 USA. EM hozzhou@ic.sunysb.edu; sswong@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 620-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909478 ER PT J AU Zhou, HJ Mao, YB Wong, SS AF Zhou, Hongjun Mao, Yuanbing Wong, Stanislaus S. TI INOR 798-Shape control and spectroscopy of crystalline BaZrO3 perovskite particles SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 [Zhou, Hongjun; Wong, Stanislaus S.] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. [Mao, Yuanbing] Univ Calif Los Angeles, Dept Chem & Biomol Engn, Los Angeles, CA 90095 USA. [Wong, Stanislaus S.] Brookhaven Natl Lab, Dept Mat Sci, Stony Brook, NY 11794 USA. EM hozzhou@ic.sunysb.edu; ybmao@ucla.edu; sswong@notes.cc.sunysb.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 19 PY 2007 VL 234 MA 798-INOR PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA V12IW UT WOS:000207593909473 ER PT J AU He, Y Jiang, Y Xu, NP Zou, J Huang, BY Liu, CT Liaw, PK AF He, Yuehui Jiang, Yao Xu, Nanping Zou, Jin Huang, Baiyun Liu, Chain T. Liaw, Peter K. TI Fabrication of Ti-Al micro/nanometer-sized porous alloys through the Kirkendall effect SO ADVANCED MATERIALS LA English DT Article ID ELECTRONIC-STRUCTURE; PORE-SIZE; DIFFUSION; MEMBRANE; BEHAVIOR; METALS; FILMS AB A new method based on the Kirkendall effect is developed to fabricate Ti-Al porous alloys with open pores and adjustable pore size. This novel porous material (microstructures shown in the figure) has excellent pore size stability and outstanding corrosion and oxidation resistance. These exceptional advantages of fabricated Ti-Al porous alloys make them an ideal filtration candidate for rugged environments. C1 Univ Queensland, Sch Engn, Brisbane, Qld 4072, Australia. Univ Queensland, Ctr Microscopy & Microanal, Brisbane, Qld 4072, Australia. Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China. Nanjing Univ Technol, Membrane Sci & Technol Res Ctr, Nanjing 210009, Peoples R China. Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37886 USA. RP Zou, J (reprint author), Univ Queensland, Sch Engn, Brisbane, Qld 4072, Australia. EM j.zou@uq.edu.au RI Zou, Jin/B-3183-2009 OI Zou, Jin/0000-0001-9435-8043 NR 24 TC 68 Z9 78 U1 9 U2 56 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD AUG 17 PY 2007 VL 19 IS 16 BP 2102 EP + DI 10.1002/adma.200602398 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 204DG UT WOS:000249023200010 ER PT J AU Borisevich, AY Wang, SW Rashkeev, SN Glazoff, M Pennycook, SJ Pantelides, ST AF Borisevich, Albina Y. Wang, Sanwu Rashkeev, Sergey N. Glazoff, Michael Pennycook, Stephen J. Pantelides, Sokrates T. TI Dual nanoparticle/substrate control of catalytic dehydrogenation SO ADVANCED MATERIALS LA English DT Article ID SUPPORTED CHROMIUM-OXIDE; OXIDATIVE DEHYDROGENATION; TRANSITION ALUMINAS; SURFACE-CHEMISTRY; PROPANE; METALS; SILICA; ENERGY; GAMMA; ETA AB Chromia/alumina catalysts are widely used for oxidative dehydrogenation of alkanes, but questions about the relationship between their properties and characteristics remain. Experimental techniques and first-principles calculations are used to demonstrate that the reaction is enabled by CrOx clusters adsorbed on alumina surfaces, and that the key reaction sites are low-coordination-number 0 atoms (see figure). C1 Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA. Univ Tulsa, Dept Phys & Engn Phys, Tulsa, OK 74104 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. Alcoa Ctr, Alcoa Tech Ctr, Alcoa Ctr, PA 15069 USA. RP Borisevich, AY (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA. EM albinab@ornl.gov RI Borisevich, Albina/B-1624-2009 OI Borisevich, Albina/0000-0002-3953-8460 NR 33 TC 13 Z9 13 U1 0 U2 12 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD AUG 17 PY 2007 VL 19 IS 16 BP 2129 EP + DI 10.1002/adma.200601618 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 204DG UT WOS:000249023200015 ER PT J AU Morgado, L Bruix, M Londer, YY Pokkuluri, PR Schiffer, M Salgueiro, CA AF Morgado, Leonor Bruix, Marta Londer, Yuri Y. Pokkuluri, P. Raj Schiffer, Marianne Salgueiro, Carlos A. TI Redox-linked conformational changes of a multiheme cytochrome from Geobacter sulfurreducens SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article DE multiheme cytochromes; NMR; redox-linked conformations; Geobacter ID VULGARIS MIYAZAKI-F; DESULFOVIBRIO-VULGARIS; THERMODYNAMIC CHARACTERIZATION; SHEWANELLA FRIGIDIMARINA; TETRAHEME CYTOCHROMES; FLAVOCYTOCHROME C(3); ENERGY TRANSDUCTION; ESCHERICHIA-COLI; STRUCTURAL BASIS; 4 HEMES AB Multiheme e-type cytochromes from members of the Desulfbvibrionacea and Geobactereacea families play crucial roles in the bioenergetics of these microorganisms. Thermodynamic studies using NMR and visible spectroscopic techniques on tetraheme cytochromes c(3) isolated from Desulfbvibrio spp. and more recently on a triheme cytochrome from Geobacter sulfurreducens showed that the properties of each redox centre are modulated by the neighbouring redox centres enabling these proteins to perform energy transduction and thus contributing to cellular energy conservation. Electron/proton transfer coupling relies on redox-linked conformational changes that were addressed for some multiheme cytochromes from the comparison of protein structure of fully reduced and fully oxidised forms. In this work, we identify for the first time in a multiheme cytochrome the simultaneous presence of two different conformations in solution. This was achieved by probing the different oxidation stages of a triheme cytochrome isolated from G. sulfurreducens using 2D-NMR techniques. The results presented here will be the foundations to evaluate the modulation of the redox centres properties by conformational changes that occur during the reoxidation of a multiheme protein. (c) 2007 Elsevier Inc. All rights reserved. C1 Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Quim, Requimte CQFB, P-2829516 Caparica, Portugal. CSIC, Inst Quim Fis Rocasolano, Dept Espectroscopia & Estruct Mol, E-28006 Madrid, Spain. Argonne Natl Lab, Div Biosci, Argonne, IL 60439 USA. RP Salgueiro, CA (reprint author), Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Quim, Requimte CQFB, P-2829516 Caparica, Portugal. EM csalgueiro@dq.fct.uni.pt RI Bruix, Marta/H-4161-2011; Salgueiro, Carlos/A-4522-2013; Morgado, Leonor/D-7387-2013; REQUIMTE, AL/H-9106-2013; REQUIMTE, SMB/M-5694-2013; REQUIMTE, UCIBIO/N-9846-2013 OI Bruix, Marta/0000-0002-0096-3558; Salgueiro, Carlos/0000-0003-1136-809X; Morgado, Leonor/0000-0002-3760-5180; NR 25 TC 13 Z9 13 U1 1 U2 8 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD AUG 17 PY 2007 VL 360 IS 1 BP 194 EP 198 DI 10.1016/j.bbrc.2007.06.026 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 191NH UT WOS:000248137400031 PM 17583674 ER PT J AU Wick, CD Dang, LX AF Wick, Collin D. Dang, Liem X. TI Hydroxyl radical transfer between interface and bulk from transition path sampling SO CHEMICAL PHYSICS LETTERS LA English DT Article ID MOLECULAR-DYNAMICS; RATE CONSTANTS; WATER; LIQUID; SOLVATION; ENSEMBLE AB The transition path sampling technique was used to determine trajectories connecting the interface and bulk for the transfer of a hydroxyl radical from the air-water interface to the water bulk. The trajectories were used to calculate the rate of transfer for the process. In addition, transition state and Grote-Hynes theories were used to calculate the rate of transfer. It was found that transition state theory significantly overestimated the rate of transfer, while the Grote-Hynes theory estimated a transmission coefficient that was fairly close to that from transition path sampling. Analysis of transition states found that a majority of them were not at the free energy barrier from the potential of mean force, but shifted towards the vapor phase. (c) 2007 Elsevier B.V. All rights reserved. C1 Pacific NW Natl Lab, Div Mat & Chem Sci, Richland, WA 99352 USA. RP Dang, LX (reprint author), Pacific NW Natl Lab, Div Mat & Chem Sci, Richland, WA 99352 USA. EM liem.dang@pnl.gov NR 15 TC 3 Z9 3 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 AUG 17 PY 2007 VL 444 IS 1-3 BP 66 EP 70 DI 10.1016/j.cplett.2007.06.121 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 205LP UT WOS:000249115400012 ER PT J AU Shalliker, RA Wong, V Guiochon, G AF Shalliker, R. A. Wong, V. Guiochon, G. TI Reproducibility of the finger pattern in viscous fingering SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE preparative chromatography; flow pattern visualization; viscous fingering ID SIZE-EXCLUSION CHROMATOGRAPHY; LIQUID-CHROMATOGRAPHY; MISCIBLE DISPLACEMENTS; SOLUTE MIGRATION; POROUS-MEDIA; VISUALIZATION; COLUMNS; PERFORMANCE; VISCOSITY AB The complex pattern of viscous fingering (VF) appears to be chaotic. Its early evolution seems predictable but, on a long time-scale, it is not so and the transition is complex. Detailed experimental observations of fingering systems have been hindered by various limitations. We present a new method for visualising VF in particulate beds. Our results show that the onset of VF and its initial evolution are reasonably reproducible at very low Reynolds numbers (Re < 0.005). The transition to irreprodurcibility of the fingering pattern develops progressively over long migration distances. When the flow velocity increases, changes in the finger distribution take place over shorter migration distances, become more important, and the fingers evolve faster. Understanding this new aspect might allow improvements in the efficiency of processes governed by VF, e.g. injection of large, concentrated samples or transfer of large fractions between two streams having different viscosities. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Univ Western Sydney, Nanoscale Org & Dynam Grp, S Pentith, DC 1797, Australia. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN USA. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. EM guiochon@ion.chem.utk.edu NR 26 TC 16 Z9 16 U1 0 U2 5 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 AUG 17 PY 2007 VL 1161 IS 1-2 BP 121 EP 131 DI 10.1016/j.chroma.2007.05.040 PG 11 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 202HB UT WOS:000248891500018 PM 17628573 ER PT J AU Gritti, F Kazakevich, Y Guiochon, G AF Gritti, Fabrice Kazakevich, Yuri Guiochon, Georges TI Measurement of hold-up volumes in reverse-phase liquid chromatography - Definition and comparison between static and dynamic methods SO JOURNAL OF CHROMATOGRAPHY A LA English DT Article DE RP-HPLC; hold-up volume of chromatographic columns; adsorbent characterization; BET nitrogen adsorption (LTNA); inverse size exclusion chromatography (ISEC); pycnometry; thermodynamic hold-up volume; minor disturbance method ID DEAD-VOLUME; PRESSURE; COLUMNS; COMPRESSIBILITY; MIXTURES; SILICA; PARTICLES AB The hold-up volumes, V-M of two series of RPLC adsorbents were measured using three different approaches. The first method is based on the difference between the volumes of the empty column tube (150 x 4.6 mm) and of the material packed inside the column. It is considered as giving the correct value of V-M. This method combines the results of the BET characterization of the adsorbent before packing (giving the specific pore volume), of carbon element analysis (giving the mass fraction of silica and alkyl bonded chains), of Helium pycnometry (providing silica density), and of inverse size exclusion chromatography (ISEC) performed on the packed column (yielding the interparticle volume). The second method is static pycnometry, which consists in weighing the masses of the chromatographic column filled with two distinct solvents of different densities. The last method is based on the thermodynamic definition of the hold-up volume and uses the dynamic minor disturbance method (MDM) with binary eluents. The experimental results of these three non-destructive methods are compared. They exhibit significant, systematic differences. Pycnometry underestimates V-M by a few percent for adsorbents having a high carbon content. The results of the MDM method depend strongly on the choice of the binary solution used and may underestimate or overestimate V-M. The hold-up volume Vm of the R-PLC adsorbents tested is best measured by the MDM method using a mixture of ethanol and water. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Seton Hall Univ, Dept Chem, Seton Orange, NJ USA. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. EM guiochon@utk.edu NR 22 TC 76 Z9 76 U1 0 U2 8 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 AUG 17 PY 2007 VL 1161 IS 1-2 BP 157 EP 169 DI 10.1016/j.chroma.2007.05.102 PG 13 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 202HB UT WOS:000248891500022 PM 17610882 ER PT J AU Wang, J AF Wang, Jian TI Effects of spatial and temporal variations in aerosol properties on mean cloud albedo SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID GLOBAL CLIMATE MODELS; STRATOCUMULUS CLOUDS; DROPLET FORMATION; PARAMETERIZATION AB [1] The mean cloud albedo over a spatial or temporal domain depends not only on the mean cloud condensation nucleus (CCN) spectrum but also on the CCN spectrum variation. When the variation of CCN spectrum is neglected, cloud albedo calculated using the mean CCN spectrum is positively biased. The CCN spectrum variation due to either variation in size distribution or chemical composition, as well as its corresponding effect on mean cloud albedo, was investigated using data collected at Pt. Reyes, California, during the July 2005 Marine Stratus Experiment (MASE). Even when the variation in chemical composition during the entire 28-day project is neglected, the error in mean cloud albedo is small, and the corresponding error in mean upwelling irradiance is less than 0.5 W/m(2). This small and nonsystematic error over such an extended period suggests that for study of mean cloud albedo and upwelling irradiance, the CCN spectrum can be parameterized using the average particle chemical composition or particle activation diameter based on location or air mass type. In contrast, neglecting the variation in aerosol size distribution or CCN spectrum results in positive bias in mean cloud albedo. The bias increases superlinearly with the relative standard deviation of CCN concentration over the domain of interest. On the basis of the MASE data, the average bias in mean upwelling irradiance within grid cells of typical global models ranges 0.4-0.5 W/m(2) when only the variation of aerosol size distribution is neglected and increases to 0.5-0.7 W/m(2) when the variation of CCN spectrum is neglected. The bias in mean upwelling irradiance can potentially, albeit infrequently, reach 12 W/m(2) within grid cells of typical global models if the mean cloud albedo is derived using the mean size distribution or mean CCN spectrum. This suggests accurate evaluation of mean cloud albedo requires the variation of CCN spectrum or aerosol size distribution be taken into consideration, at least for high variability of CCN concentration. C1 Brookhaven Natl Lab, Div Atmospher Sci, Upton, NY 11973 USA. RP Wang, J (reprint author), Brookhaven Natl Lab, Div Atmospher Sci, 75 Rutherford Dr, Upton, NY 11973 USA. EM jian@bnl.gov RI Wang, Jian/G-9344-2011 NR 16 TC 6 Z9 6 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD AUG 17 PY 2007 VL 112 IS D16 AR D16201 DI 10.1029/2007JD008565 PG 16 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 202JM UT WOS:000248897800004 ER PT J AU Maslov, S Sneppen, K Ispolatov, I AF Maslov, Sergei Sneppen, Kim Ispolatov, I. TI Spreading out of perturbations in reversible reaction networks SO NEW JOURNAL OF PHYSICS LA English DT Article AB Using an example of physical interactions between proteins, we study how a perturbation propagates in the equilibrium of a network of reversible reactions governed by the law of mass action. We introduce a matrix formalism to describe the linear response of all equilibrium concentrations to shifts in total abundances of individual reactants, and reveal its heuristic analogy to the flow of electric current in a network of resistors. Our main conclusion is that, on average, the induced changes in equilibrium concentrations decay exponentially as a function of network distance from the source of perturbation. We analyze how this decay is influenced by such factors as the topology of a network, binding strength, and correlations between concentrations of neighboring nodes. We find that the minimal branching of the network, small values of dissociation constants, and low equilibrium free (unbound) concentrations of reacting substances all decrease the decay constant and thus increase the range of propagation. Exact analytic expressions for the decay constant are obtained for the case of equally strong interactions and uniform as well as oscillating concentrations on the Bethe lattice. Our general findings are illustrated using a real network of protein-protein interactions in baker's yeast with experimentally determined protein concentrations. C1 Brookhaven Natl Lab, Dept Condensed Matter Phys, Upton, NY 11973 USA. Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark. Ariadne Genom Inc, Rockville, MD 20850 USA. RP Maslov, S (reprint author), Brookhaven Natl Lab, Dept Condensed Matter Phys, Upton, NY 11973 USA. EM maslov@bnl.gov; iispolat@lauca.usach.cl RI Ispolatov, Yaroslav/E-8544-2010; Maslov, Sergei/C-2397-2009; OI Ispolatov, Yaroslav/0000-0002-0201-3396; Maslov, Sergei/0000-0002-3701-492X; Sneppen, Kim/0000-0001-9820-3567 FU NIGMS NIH HHS [R01 GM068954-01, R01 GM068954] NR 6 TC 12 Z9 14 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1367-2630 J9 NEW J PHYS JI New J. Phys. PD AUG 17 PY 2007 VL 9 AR 273 DI 10.1088/1367-2630/9/8/273 PG 11 WC Physics, Multidisciplinary SC Physics GA 205KJ UT WOS:000249112100004 PM 18046464 ER PT J AU Aubert, B Bona, M Boutigny, D Karyotakis, Y Lees, JP Poireau, V Prudent, X Tisserand, V Zghiche, A Tico, JG Grauges, E Lopez, L Palano, A Eigen, G Stugu, B Sun, L Abrams, GS Battaglia, M Brown, DN Button-Shafer, J Cahn, RN Groysman, Y Jacobsen, RG Kadyk, JA Kerth, LT Kolomensky, YG Kukartsev, G Pegna, DL Lynch, G Mir, LM Orimoto, TJ Ronan, MT Tackmann, K Wenzel, WA Sanchez, PDA Hawkes, CM Watson, AT Held, T Koch, H Lewandowski, B Pelizaeus, M Schroeder, T Steinke, M Walker, D Asgeirsson, DJ Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Mattison, TS McKenna, JA Khan, A Saleem, M Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Todyshev, KY Bondioli, M Curry, S Eschrich, I Kirkby, D Lankford, AJ Lund, P Mandelkern, M Martin, EC Stoker, DP Abachi, S Buchanan, C Foulkes, SD Gary, JW Liu, F Long, O Shen, BC Zhang, L Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Kovalskyi, D Richman, JD Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Schalk, T Schumm, BA Seiden, A Williams, DC Wilson, MG Winstrom, LO Chen, E Cheng, CH Fang, F Hitlin, DG Narsky, I Piatenko, T Porter, FC Andreassen, R Mancinelli, G Meadows, BT Mishra, K Sokoloff, MD Blanc, F Bloom, PC Chen, S Ford, WT Hirschauer, JF Kreisel, A Nagel, M Nauenberg, U Olivas, A Smith, JG Ulmer, KA Wagner, SR Zhang, J Gabareen, AM Soffer, A Toki, WH Wilson, RJ Winklmeier, F Zeng, Q Altenburg, DD Feltresi, E Hauke, A Jasper, H Merkel, J Petzold, A Spaan, B Wacker, K Brandt, T Klose, V Kobel, MJ Lacker, HM Mader, WF Nogowski, R Schubert, J Schubert, KR Schwierz, R Sundermann, JE Volk, A Bernard, D Bonneaud, GR Latour, E Lombardo, V Thiebaux, C Verderi, M Clark, PJ Gradl, W Muheim, F Playfer, S Robertson, AI Xie, Y Andreotti, M Bettoni, D Bozzi, C Calabrese, R Cecchi, A Cibinetto, G Franchini, P Luppi, E Negrini, M Petrella, A Piemontese, L Prencipe, E Santoro, V Anulli, F Baldini-Ferroli, R Calcaterra, A De Sangro, R Finocchiaro, G Pacetti, S Patteri, P Peruzzi, IM Piccolo, M Rama, M Zallo, A Buzzo, A Contri, R Lo Vetere, M Macri, MM Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Chaisanguanthum, KS Morii, M Wu, J Dubitzky, RS Marks, J Schenk, S Uwer, U Bard, DJ Dauncey, PD Flack, RL Nash, JA Nikolich, MB Vazquez, WP Tibbetts, M Behera, PK Chai, X Charles, MJ Mallik, U Meyer, NT Ziegler, V Cochran, J Crawley, HB Dong, L Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Gritsan, AV Guo, ZJ Lae, CK Denig, AG Fritsch, M Schott, G Arnaud, N Bequilleux, J Davier, M Grosdidier, G Hocker, A Lepeltier, V Le Diberder, F Lutz, AM Pruvot, S Rodier, S Roudeau, P Schune, MH Serrano, J Sordini, V Stocchi, A Wang, WF Wormser, G Lange, DJ Wright, DM Bingham, I Chavez, CA Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Payne, DJ Schofield, KC Touramanis, C Bevan, AJ George, KA Di Lodovico, F Menges, W Sacco, R Cowan, G Flaecher, HU Hopkins, DA Paramesvaran, S Salvatore, F Wren, AC Brown, DN Davis, CL Allison, J Barlow, NR Barlow, RJ Chia, YM Edgar, CL Lafferty, GD West, TJ Yi, JI Anderson, J Chen, C Jawahery, A Roberts, DA Simi, G Tuggle, JM Blaylock, G Dallapiccola, C Hertzbach, SS Li, X Moore, TB Salvati, E Saremi, S Cowan, R Dujmic, D Fisher, PH Koeneke, K Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Zhao, M Zheng, Y Mclachlin, SE Patel, PM Robertson, SH Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Simard, M Taras, P Viaud, FB Nicholson, H De Nardo, G Fabozzi, F Lista, L Monorchio, D Sciacca, C Baak, MA Raven, G Snoek, HL Jessop, CP LoSecco, JM Benelli, G Corwin, LA Honscheid, K Kagan, H Kass, R Morris, JP Rahimi, AM Regensburger, JJ Wong, QK Blount, NL Brau, J Frey, R Igonkina, O Kolb, JA Lu, M Rahmat, R Sinev, NB Strom, D Strube, J Torrence, E Gagliardi, N Gaz, A Margoni, M Morandin, M Pompili, A Posocco, M Rotondo, M Simonetto, F Stroili, R Voci, C Ben-Haim, E Briand, H Calderini, G Chauveau, J David, P Del Buono, L de la Vaissiere, C Hamon, O Leruste, P Malcles, J Ocariz, J Perez, A Gladney, L Biasini, M Covarelli, R Manoni, E Angelini, C Batignani, G Bettarini, S Carpinelli, M Cenci, R Cervelli, A Forti, F Giorgi, MA Lusiani, A Marchiori, G Mazur, MA Morganti, M Neri, N Paoloni, E Rizzo, G Walsh, JJ Haire, M Biesiada, J Elmer, P Lau, YP Lu, C Olsen, J Smith, AJS Telnov, AV Baracchini, E Bellini, F Cavoto, G D'Orazio, A del Re, D Di Marco, E Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Jackson, PD Gioi, LL Mazzoni, MA Morganti, S Piredda, G Polci, F Renga, F Voena, C Ebert, M Hartmann, T Schroder, H Waldi, R Adye, T Castelli, G Franek, B Olaiya, EO Ricciardi, S Roethel, W Wilson, FF Aleksan, R Emery, S Escalier, M Gaidot, A Ganzhur, SF de Monchenault, GH Kozanecki, W Vasseur, G Yeche, C Chen, XR Liu, H Park, W Purohit, MV Wilson, JR Allen, MT Aston, D Bartoldus, R Bechtle, P Berger, N Claus, R Coleman, JP Convery, MR Dingfelder, JC Dorfan, J Dubois-Felsmann, GP Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Graham, MT Grenier, P Hast, C Hryn'ova, T Innes, WR Kaminski, J Kelsey, MH Kim, H Kim, P Kocian, ML Leith, DWGS Luitz, SLS Luth, V Lynch, HL MacFarlane, DB Marsiske, H Messner, R Muller, DR O'Grady, CP Ofte, I Perazzo, A Perl, M Pulliam, T Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, SK Thompson, JM Va'vra, J van Bakel, N Wagner, AP Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Wilden, L Ahmed, S Alam, MS Bula, R Ernst, JA Jain, V Pan, B Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Ritchie, JL Ruland, AM Schilling, CJ Schwitters, RF Izen, JM Lou, XC Ye, S Bianchi, F Gallo, F Gamba, D Pelliccioni, M Bomben, M Bosisio, L Cartaro, C Cossutti, F Della Ricca, G Lanceri, L Vitale, L Azzolini, V Lopez-March, N Martinez-Vidal, F Milanes, DA Oyanguren, A Albert, J Banerjee, S Bhuyan, B Hamano, K Kowalewski, R Nugent, IM Roney, JM Sobie, RJ Back, JJ Harrison, PF Ilic, J Latham, TE Mohanty, GB Pappagallo, M Band, HR Chen, X Dasu, S Flood, KT Hollar, JJ Kutter, PE Pan, Y Pierini, M Prepost, R Wu, SL Neal, H AF Aubert, B. Bona, M. Boutigny, D. Karyotakis, Y. Lees, J. P. Poireau, V. Prudent, X. Tisserand, V. Zghiche, A. Tico, J. Garra Grauges, E. Lopez, L. Palano, A. Eigen, G. Stugu, B. Sun, L. Abrams, G. S. Battaglia, M. Brown, D. N. Button-Shafer, J. Cahn, R. N. Groysman, Y. Jacobsen, R. G. Kadyk, J. A. Kerth, L. T. Kolomensky, Yu. G. Kukartsev, G. Pegna, D. Lopes Lynch, G. Mir, L. M. Orimoto, T. J. Ronan, M. T. Tackmann, K. Wenzel, W. A. Sanchez, P. Del Amo Hawkes, C. M. Watson, A. T. Held, T. Koch, H. Lewandowski, B. Pelizaeus, M. Schroeder, T. Steinke, M. Walker, D. Asgeirsson, D. J. Cuhadar-Donszelmann, T. Fulsom, B. G. Hearty, C. Mattison, T. S. McKenna, J. A. Khan, A. Saleem, M. Teodorescu, L. Blinov, V. E. Bukin, A. D. Druzhinin, V. P. Golubev, V. B. Onuchin, A. P. Serednyakov, S. I. Skovpen, Yu. I. Solodov, E. P. Todyshev, K. Yu. Bondioli, M. Curry, S. Eschrich, I. Kirkby, D. Lankford, A. J. Lund, P. Mandelkern, M. Martin, E. C. Stoker, D. P. Abachi, S. Buchanan, C. Foulkes, S. D. Gary, J. W. Liu, F. Long, O. Shen, B. C. Zhang, L. Paar, H. P. Rahatlou, S. Sharma, V. Berryhill, J. W. Campagnari, C. Cunha, A. Dahmes, B. Hong, T. M. Kovalskyi, D. Richman, J. D. Beck, T. W. Eisner, A. M. Flacco, C. J. Heusch, C. A. Kroseberg, J. Lockman, W. S. Schalk, T. Schumm, B. A. Seiden, A. Williams, D. C. Wilson, M. G. Winstrom, L. O. Chen, E. Cheng, C. H. Fang, F. Hitlin, D. G. Narsky, I. Piatenko, T. Porter, F. C. Andreassen, R. Mancinelli, G. Meadows, B. T. Mishra, K. Sokoloff, M. D. Blanc, F. Bloom, P. C. Chen, S. Ford, W. T. Hirschauer, J. F. Kreisel, A. Nagel, M. Nauenberg, U. Olivas, A. Smith, J. G. Ulmer, K. A. Wagner, S. R. Zhang, J. Gabareen, A. M. Soffer, A. Toki, W. H. Wilson, R. J. Winklmeier, F. Zeng, Q. Altenburg, D. D. Feltresi, E. Hauke, A. Jasper, H. Merkel, J. Petzold, A. Spaan, B. Wacker, K. Brandt, T. Klose, V. Kobel, M. J. Lacker, H. M. Mader, W. F. Nogowski, R. Schubert, J. Schubert, K. R. Schwierz, R. Sundermann, J. E. Volk, A. Bernard, D. Bonneaud, G. R. Latour, E. Lombardo, V. Thiebaux, Ch. Verderi, M. Clark, P. J. Gradl, W. Muheim, F. Playfer, S. Robertson, A. I. Xie, Y. Andreotti, M. Bettoni, D. Bozzi, C. Calabrese, R. Cecchi, A. Cibinetto, G. Franchini, P. Luppi, E. Negrini, M. Petrella, A. Piemontese, L. Prencipe, E. Santoro, V. Anulli, F. Baldini-Ferroli, R. Calcaterra, A. De Sangro, R. Finocchiaro, G. Pacetti, S. Patteri, P. Peruzzi, I. M. Piccolo, M. Rama, M. Zallo, A. Buzzo, A. Contri, R. Lo Vetere, M. Macri, M. M. Monge, M. R. Passaggio, S. Patrignani, C. Robutti, E. Santroni, A. Tosi, S. Chaisanguanthum, K. S. Morii, M. Wu, J. Dubitzky, R. S. Marks, J. Schenk, S. Uwer, U. Bard, D. J. Dauncey, P. D. Flack, R. L. Nash, J. A. Nikolich, M. B. Vazquez, W. Panduro Tibbetts, M. Behera, P. K. Chai, X. Charles, M. J. Mallik, U. Meyer, N. T. Ziegler, V. Cochran, J. Crawley, H. B. Dong, L. Eyges, V. Meyer, W. T. Prell, S. Rosenberg, E. I. Rubin, A. E. Gritsan, A. V. Guo, Z. J. Lae, C. K. Denig, A. G. Fritsch, M. Schott, G. Arnaud, N. Bequilleux, J. Davier, M. Grosdidier, G. Hoecker, A. Lepeltier, V. Le Diberder, F. Lutz, A. M. Pruvot, S. Rodier, S. Roudeau, P. Schune, M. H. Serrano, J. Sordini, V. Stocchi, A. Wang, W. F. Wormser, G. Lange, D. J. Wright, D. M. Bingham, I. Chavez, C. A. Forster, I. J. Fry, J. R. Gabathuler, E. Gamet, R. Hutchcroft, D. E. Payne, D. J. Schofield, K. C. Touramanis, C. Bevan, A. J. George, K. A. Di Lodovico, F. Menges, W. Sacco, R. Cowan, G. Flaecher, H. U. Hopkins, D. A. Paramesvaran, S. Salvatore, F. Wren, A. C. Brown, D. N. Davis, C. L. Allison, J. Barlow, N. R. Barlow, R. J. Chia, Y. M. Edgar, C. L. Lafferty, G. D. West, T. J. Yi, J. I. Anderson, J. Chen, C. Jawahery, A. Roberts, D. A. Simi, G. Tuggle, J. M. Blaylock, G. Dallapiccola, C. Hertzbach, S. S. Li, X. Moore, T. B. Salvati, E. Saremi, S. Cowan, R. Dujmic, D. Fisher, P. H. Koeneke, K. Sciolla, G. Sekula, S. J. Spitznagel, M. Taylor, F. Yamamoto, R. K. Zhao, M. Zheng, Y. Mclachlin, S. E. Patel, P. M. Robertson, S. H. Lazzaro, A. Palombo, F. Bauer, J. M. Cremaldi, L. Eschenburg, V. Godang, R. Kroeger, R. Sanders, D. A. Summers, D. J. Zhao, H. W. Brunet, S. Cote, D. Simard, M. Taras, P. Viaud, F. B. Nicholson, H. De Nardo, G. Fabozzi, F. Lista, L. Monorchio, D. Sciacca, C. Baak, M. A. Raven, G. Snoek, H. L. Jessop, C. P. LoSecco, J. M. Benelli, G. Corwin, L. A. Honscheid, K. Kagan, H. Kass, R. Morris, J. P. Rahimi, A. M. Regensburger, J. J. Wong, Q. K. Blount, N. L. Brau, J. Frey, R. Igonkina, O. Kolb, J. A. Lu, M. Rahmat, R. Sinev, N. B. Strom, D. Strube, J. Torrence, E. Gagliardi, N. Gaz, A. Margoni, M. Morandin, M. Pompili, A. Posocco, M. Rotondo, M. Simonetto, F. Stroili, R. Voci, C. Ben-Haim, E. Briand, H. Calderini, G. Chauveau, J. David, P. Del Buono, L. de la Vaissiere, Ch. Hamon, O. Leruste, Ph. Malcles, J. Ocariz, J. Perez, A. Gladney, L. Biasini, M. Covarelli, R. Manoni, E. Angelini, C. Batignani, G. Bettarini, S. Carpinelli, M. Cenci, R. Cervelli, A. Forti, F. Giorgi, M. A. Lusiani, A. Marchiori, G. Mazur, M. A. Morganti, M. Neri, N. Paoloni, E. Rizzo, G. Walsh, J. J. Haire, M. Biesiada, J. Elmer, P. Lau, Y. P. Lu, C. Olsen, J. Smith, A. J. S. Telnov, A. V. Baracchini, E. Bellini, F. Cavoto, G. D'Orazio, A. del Re, D. Di Marco, E. Faccini, R. Ferrarotto, F. Ferroni, F. Gaspero, M. Jackson, P. D. Gioi, L. Li Mazzoni, M. A. Morganti, S. Piredda, G. Polci, F. Renga, F. Voena, C. Ebert, M. Hartmann, T. Schroeder, H. Waldi, R. Adye, T. Castelli, G. Franek, B. Olaiya, E. O. Ricciardi, S. Roethel, W. Wilson, F. F. Aleksan, R. Emery, S. Escalier, M. Gaidot, A. Ganzhur, S. F. de Monchenault, G. Hamel Kozanecki, W. Vasseur, G. Zito, M. Chen, X. R. Liu, H. Park, W. Purohit, M. V. Wilson, J. R. Allen, M. T. Aston, D. Bartoldus, R. Bechtle, P. Berger, N. Claus, R. Coleman, J. P. Convery, M. R. Dingfelder, J. C. Dorfan, J. Dubois-Felsmann, G. P. Dunwoodie, W. Field, R. C. Glanzman, T. Gowdy, S. J. Graham, M. T. Grenier, P. Hast, C. Hryn'ova, T. Innes, W. R. Kaminski, J. Kelsey, M. H. Kim, H. Kim, P. Kocian, M. L. Leith, D. W. G. S. Luitz, S. Li S. Luth, V. Lynch, H. L. MacFarlane, D. B. Marsiske, H. Messner, R. Muller, D. R. O'Grady, C. P. Ofte, I. Perazzo, A. Perl, M. Pulliam, T. Ratcliff, B. N. Roodman, A. Salnikov, A. A. Schindler, R. H. Schwiening, J. Snyder, A. Stelzer, J. Su, D. Sullivan, M. K. Suzuki, K. Swain, S. K. Thompson, J. M. Va'vra, J. van Bakel, N. Wagner, A. P. Weaver, M. Wisniewski, W. J. Wittgen, M. Wright, D. H. Yarritu, A. K. Yi, K. Young, C. C. Burchat, P. R. Edwards, A. J. Majewski, S. A. Petersen, B. A. Wilden, L. Ahmed, S. Alam, M. S. Bula, R. Ernst, J. A. Jain, V. Pan, B. Saeed, M. A. Wappler, F. R. Zain, S. B. Bugg, W. Krishnamurthy, M. Spanier, S. M. Eckmann, R. Ritchie, J. L. Ruland, A. M. Schilling, C. J. Schwitters, R. F. Izen, J. M. Lou, X. C. Ye, S. Bianchi, F. Gallo, F. Gamba, D. Pelliccioni, M. Bomben, M. Bosisio, L. Cartaro, C. Cossutti, F. Della Ricca, G. Lanceri, L. Vitale, L. Azzolini, V. Lopez-March, N. Martinez-Vidal, F. Milanes, D. A. Oyanguren, A. Albert, J. Banerjee, Sw. Bhuyan, B. Hamano, K. Kowalewski, R. Nugent, I. M. Roney, J. M. Sobie, R. J. Back, J. J. Harrison, P. F. Ilic, J. Latham, T. E. Mohanty, G. B. Pappagallo, M. Band, H. R. Chen, X. Dasu, S. Flood, K. T. Hollar, J. J. Kutter, P. E. Pan, Y. Pierini, M. Prepost, R. Wu, S. L. Neal, H. TI Measurement of CP-Violating asymmetries in B-0 ->(DD -/+)-D-(*)+/- SO PHYSICAL REVIEW LETTERS LA English DT Article ID DECAYS AB We present updated measurements of CP-violating asymmetries in the decays B-0 ->(DD -/+)-D-*+/- and B-0 -> D+D- using (383 +/- 4) x 10(6)B (B) over bar pairs collected by the BABAR detector at the SLAC PEP-II B factory. We determine the time-integrated CP asymmetry A(D*+/- D -/+) = 0.12 +/- 0.06 +/- 0.02, and the time-dependent asymmetry parameters to be CD*+D-= 0.18 +/- 0.15 +/- 0.04, SD*+D-= -0.79 +/- 0.21 +/- 0.06, CD*-D+ = 0.23 +/- 0.15 +/- 0.04, SD*-D+= -0.44 +/- 0.22 +/- 0.06, CD+D- = 0.11 +/- 0.22 +/- 0.07, and SD+D- = -0.54 +/- 0.34 +/- 0.06, where the first uncertainty is statistical and the second is systematic. C1 IN2P3 CNRS, Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Savoie, F-74941 Annecy Le Vieux, France. Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Univ Bari, Ist Nazl Fis Nucl, I-70126 Bari, Italy. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Inst Phys, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Univ Ferrara, Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Univ Genoa, Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ, Ames, IA 50011 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany. Univ Paris 11, IN2P3, CNRS, Lab Accelerateur Lineaire, F-91898 Orsay, France. Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. Univ London Queen Mary & Westfield Coll, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Univ Milan, Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico 2, Dipartimento Sci Fisiche, I-80176 Naples, Italy. Univ Naples Federico 2, Ist Nazl Fis Nucl, I-80176 Naples, Italy. Natl Inst Nucl & High Energy Phys, NIKHEF, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartmento Fis, I-35121 Padua, Italy. Univ Padua, Ist Nazl Fis Nucl, I-35121 Padua, Italy. Univ Paris 06, Univ Denis Diderot Paris 7, Lab Phys Nucl & Hautes Energies, IN2P3 CNRS, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Univ Perugia, Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Univ Roma La Sapienza, Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Univ Turin, Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Univ Trieste, Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Aubert, B (reprint author), IN2P3 CNRS, Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI dong, liaoyuan/A-5093-2015; Rizzo, Giuliana/A-8516-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; Lista, Luca/C-5719-2008; de Sangro, Riccardo/J-2901-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Oyanguren, Arantza/K-6454-2014; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; OI Bettarini, Stefano/0000-0001-7742-2998; Ebert, Marcus/0000-0002-3014-1512; Cibinetto, Gianluigi/0000-0002-3491-6231; dong, liaoyuan/0000-0002-4773-5050; Pacetti, Simone/0000-0002-6385-3508; Covarelli, Roberto/0000-0003-1216-5235; Rizzo, Giuliana/0000-0003-1788-2866; Paoloni, Eugenio/0000-0001-5969-8712; Lanceri, Livio/0000-0001-8220-3095; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Oyanguren, Arantza/0000-0002-8240-7300; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Corwin, Luke/0000-0001-7143-3821; Sciacca, Crisostomo/0000-0002-8412-4072; Adye, Tim/0000-0003-0627-5059; Faccini, Riccardo/0000-0003-2613-5141; Cavoto, Gianluca/0000-0003-2161-918X; Wilson, Robert/0000-0002-8184-4103; Strube, Jan/0000-0001-7470-9301; Barlow, Roger/0000-0002-8295-8612; Chen, Chunhui /0000-0003-1589-9955 NR 24 TC 17 Z9 17 U1 0 U2 5 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 AUG 17 PY 2007 VL 99 IS 7 AR 071801 DI 10.1103/PhysRevLett.99.071801 PG 7 WC Physics, Multidisciplinary SC Physics GA 201XW UT WOS:000248866900011 ER PT J AU Konik, RM AF Konik, Robert M. TI Kondo physics and exact solvability of double dots systems SO PHYSICAL REVIEW LETTERS LA English DT Article ID QUANTUM DOTS; ANDERSON MODEL; TRANSPORT; SPECTROSCOPY; IMPURITY; FIELD AB We study two double dot systems, one with dots in parallel and one with dots in series, and argue they admit an exact solution via the Bethe ansatz. In the case of parallel dots we exploit the exact solution to extract the behavior of the linear response conductance. The linear response conductance of the parallel dot system possesses multiple Kondo effects, including a Kondo effect enhanced by a nonpertubative antiferromagnetic RKKY interaction, has conductance zeros in the mixed valence regime, and obeys a nontrivial form of the Friedel sum rule. C1 Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA. RP Konik, RM (reprint author), Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA. RI Konik, Robert/L-8076-2016 OI Konik, Robert/0000-0003-1209-6890 NR 31 TC 12 Z9 12 U1 0 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 AUG 17 PY 2007 VL 99 IS 7 AR 076602 DI 10.1103/PhysRevLett.99.076602 PG 4 WC Physics, Multidisciplinary SC Physics GA 201XW UT WOS:000248866900037 PM 17930911 ER PT J AU Liu, ZQ McCoy, BK Wang, ST Pindak, R Caliebe, W Barois, P Fernandes, P Nguyen, HT Hsu, CS Wang, S Huang, CC AF Liu, Z. Q. McCoy, B. K. Wang, S. T. Pindak, R. Caliebe, W. Barois, P. Fernandes, P. Nguyen, H. T. Hsu, C. S. Wang, Shun Huang, C. C. TI Unique pitch evolution in the Smectic-C-alpha(*) phase SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY-SCATTERING; ANTIFERROELECTRIC LIQUID-CRYSTALS; SEQUENCE AB Employing resonant x-ray diffraction, we observed unique pitch evolutions in the smectic-C-alpha* phase in mixtures of two antiferroelectric liquid crystals. Our results show that the pitch in this phase continuously evolves across 4 layers, contradicting a theoretical model that predicts that the smectic-C-FI2* phase intervenes in the smectic-C-alpha* phase. The phase sequences we found can be explained by another model that includes one type of long-range interaction among smectic layers. C1 Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA. Univ Bordeaux 1, Ctr Rech Paul Pascal, CNRS, F-33600 Pessac, France. Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 30050, Taiwan. RP Liu, ZQ (reprint author), Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. RI Fernandes, Paulo/B-9747-2009; Shun, Wang/O-6978-2015 OI Shun, Wang/0000-0002-7996-8887 NR 21 TC 27 Z9 27 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 17 PY 2007 VL 99 IS 7 AR 077802 DI 10.1103/PhysRevLett.99.077802 PG 4 WC Physics, Multidisciplinary SC Physics GA 201XW UT WOS:000248866900052 PM 17930926 ER PT J AU Shneor, R Monaghan, P Subedi, R Anderson, BD Aniol, K Annand, J Arrington, J Benaoum, H Benmokhtar, F Bertin, P Bertozzi, W Boeglin, W Chen, JP Choi, S Chudakov, E Cisbani, E Craver, B De Jager, CW Feuerbach, RJ Frullani, S Garibaldi, F Gayou, O Gilad, S Gilman, R Glamazdin, O Gomez, J Hansen, JO Higinbotham, DW Holmstrom, T Ibrahim, H Igarashi, R Jans, E Jiang, X Jiang, Y Kaufman, L Kelleher, A Kolarkar, A Kuchina, E Kumbartzki, G LeRose, JJ Lindgren, R Liyanage, N Margaziotis, DJ Markowitz, P Marrone, S Mazouz, M Meekins, D Michaels, R Moffit, B Nanda, S Perdrisat, CF Piasetzky, E Potokar, M Punjabi, V Qiang, Y Reinhold, J Reitz, B Ron, G Rosner, G Saha, A Sawatzky, B Shahinyan, A Sirca, S Slifer, K Solvignon, P Sulkosky, V Thompson, N Ulmer, PE Urciuoli, GM Voutier, E Wang, K Watson, JW Weinstein, LB Wojtsekhowski, B Wood, S Yao, H Zheng, X Zhu, L AF Shneor, R. Monaghan, P. Subedi, R. Anderson, B. D. Aniol, K. Annand, J. Arrington, J. Benaoum, H. Benmokhtar, F. Bertin, P. Bertozzi, W. Boeglin, W. Chen, J. P. Choi, Seonho Chudakov, E. Cisbani, E. Craver, B. De Jager, C. W. Feuerbach, R. J. Frullani, S. Garibaldi, F. Gayou, O. Gilad, S. Gilman, R. Glamazdin, O. Gomez, J. Hansen, J.-O. Higinbotham, D. W. Holmstrom, T. Ibrahim, H. Igarashi, R. Jans, E. Jiang, X. Jiang, Y. Kaufman, L. Kelleher, A. Kolarkar, A. Kuchina, E. Kumbartzki, G. LeRose, J. J. Lindgren, R. Liyanage, N. Margaziotis, D. J. Markowitz, P. Marrone, S. Mazouz, M. Meekins, D. Michaels, R. Moffit, B. Nanda, S. Perdrisat, C. F. Piasetzky, E. Potokar, M. Punjabi, V. Qiang, Y. Reinhold, J. Reitz, B. Ron, G. Rosner, G. Saha, A. Sawatzky, B. Shahinyan, A. Sirca, S. Slifer, K. Solvignon, P. Sulkosky, V. Thompson, N. Ulmer, P. E. Urciuoli, G. M. Voutier, E. Wang, K. Watson, J. W. Weinstein, L. B. Wojtsekhowski, B. Wood, S. Yao, H. Zheng, X. Zhu, L. TI Investigation of proton-proton short-range correlations via the C-12(e,e'pp) reaction SO PHYSICAL REVIEW LETTERS LA English DT Article AB We investigated simultaneously the C-12(e,e'p) and C-12(e,e'pp) reactions at Q(2)=2 (GeV/c)(2), x(B)=1.2, and in an (e, e'p) missing-momentum range from 300 to 600 MeV/c. At these kinematics, with a missing momentum greater than the Fermi momentum of nucleons in a nucleus and far from the delta excitation, short-range nucleon-nucleon correlations are predicted to dominate the reaction. For (9.5 +/- 2)% of the C-12(e,e'p) events, a recoiling partner proton was observed back-to-back to the C-12(e,e'p) missing-momentum vector, an experimental signature of correlations. C1 Tel Aviv Univ, IL-69978 Tel Aviv, Israel. MIT, Cambridge, MA 02139 USA. Kent State Univ, Kent, OH 44242 USA. Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Argonne Natl Lab, Argonne, IL 60439 USA. Syracuse Univ, Syracuse, NY 13244 USA. Univ Maryland, College Pk, MD 20742 USA. Phys Corpusculaire Lab, F-63177 Clermont Ferrand, France. Florida Int Univ, Miami, FL 33199 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Seoul Natl Univ, Seoul 151747, South Korea. Ist Nazl Fis Nucl, Sez Sanita, I-00161 Rome, Italy. Ist Super Sanita, Fis Lab, I-00161 Rome, Italy. Univ Virginia, Charlottesville, VA 22904 USA. Rutgers State Univ, Piscataway, NJ 08855 USA. Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine. Coll William & Mary, Williamsburg, VA 23187 USA. Old Dominion Univ, Norfolk, VA 23508 USA. Univ Saskatchewan, Saskatoon, SK S7N 5E2, Canada. Natl inst Voor Kernfysia Hoge Energiefysia, Amsterdam, Netherlands. Univ Sci & Technol China, Hefei, Anhui, Peoples R China. Univ Massachusetts, Amherst, MA 01003 USA. Univ Kentucky, Lexington, KY 40506 USA. Lab Phys Subatom & Cosmol, F-38026 Grenoble, France. Jozef Stefan Inst, Ljubljana 1000, Slovenia. Norfolk State Univ, Norfolk, VA 23504 USA. Temple Univ, Philadelphia, PA 19122 USA. Yerevan Phys Inst, Yerevan 375036, Armenia. Univ Ljubljana, Dept Phys, Ljubljana 1000, Slovenia. Univ Illinois, Urbana, IL 61801 USA. RP Shneor, R (reprint author), Tel Aviv Univ, IL-69978 Tel Aviv, Israel. RI Arrington, John/D-1116-2012; Higinbotham, Douglas/J-9394-2014; Cisbani, Evaristo/C-9249-2011 OI Arrington, John/0000-0002-0702-1328; Higinbotham, Douglas/0000-0003-2758-6526; Cisbani, Evaristo/0000-0002-6774-8473 NR 21 TC 84 Z9 84 U1 0 U2 0 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 AUG 17 PY 2007 VL 99 IS 7 AR 072501 DI 10.1103/PhysRevLett.99.072501 PG 5 WC Physics, Multidisciplinary SC Physics GA 201XW UT WOS:000248866900014 PM 17930888 ER PT J AU Won, C Wu, YZ Arenholz, E Choi, J Wu, J Qiu, ZQ AF Won, C. Wu, Y. Z. Arenholz, E. Choi, J. Wu, J. Qiu, Z. Q. TI Symmetry-breaking induced exchange bias in ferromagnetic Ni-Cu-Co and Ni-Fe-Co sandwiches grown on a vicinal Cu(001) surface SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNETIC-ANISOTROPY; CU(100); FILMS AB Ferromagnetic Ni-Cu-Co and Ni-Fe-Co sandwiches were grown epitaxially onto a vicinal Cu(001) substrate and investigated using magneto-optical Kerr effect and x-ray magnetic circular dichroism techniques. We find that the atomic steps of the vicinal surface break the magnetic reversal symmetry to induce an exchange bias in the Ni perpendicular magnetic hysteresis loop. The Ni exchange bias direction can be switched by changing the direction of the in-plane Co magnetization. In addition, the exchange bias can be tailored by changing the Cu or Fe spacer layer thickness. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Kyung Hee Univ, Dept Phys, Seoul 130701, South Korea. Fudan Univ, Natl Key Lab, Surface Phys Lab, Shanghai 200433, Peoples R China. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Won, C (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Wu, yizheng/P-2395-2014; Qiu, Zi Qiang/O-4421-2016 OI Wu, yizheng/0000-0002-9289-1271; Qiu, Zi Qiang/0000-0003-0680-0714 NR 27 TC 4 Z9 4 U1 1 U2 6 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 AUG 17 PY 2007 VL 99 IS 7 AR 077203 DI 10.1103/PhysRevLett.99.077203 PG 4 WC Physics, Multidisciplinary SC Physics GA 201XW UT WOS:000248866900047 PM 17930921 ER PT J AU Xu, Q Sharp, ID Yuan, CW Yi, DO Liao, CY Glaeser, AM Minor, AM Beeman, JW Ridgway, MC Kluth, P Ager, JW Chrzan, DC Haller, EE AF Xu, Q. Sharp, I. D. Yuan, C. W. Yi, D. O. Liao, C. Y. Glaeser, A. M. Minor, A. M. Beeman, J. W. Ridgway, M. C. Kluth, P. Ager, J. W., III Chrzan, D. C. Haller, E. E. TI Comment on "Large melting-point hysteresis of ge nanocrystals embedded in SiO2" - Reply SO PHYSICAL REVIEW LETTERS LA English DT Editorial Material C1 Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Elect Microscopy, Berkeley, CA 94720 USA. Australian Natl Univ, Res Sch Phys Sci & Engn, Dept Elect Mat Engn, Canberra, ACT 0200, Australia. RP Xu, Q (reprint author), Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. RI Kluth, Patrick/A-1497-2008; Ridgway, Mark/D-9626-2011; Sharp, Ian/I-6163-2015; OI Kluth, Patrick/0000-0002-1806-2432; Ridgway, Mark/0000-0002-0642-0108; Sharp, Ian/0000-0001-5238-7487; Ager, Joel/0000-0001-9334-9751 NR 3 TC 0 Z9 0 U1 1 U2 10 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 AUG 17 PY 2007 VL 99 IS 7 AR 079602 DI 10.1103/PhysRevLett.99.079602 PG 1 WC Physics, Multidisciplinary SC Physics GA 201XW UT WOS:000248866900057 ER PT J AU Bazykin, GA Kondrashov, FA Brudno, M Poliakov, A Dubchak, I Kondrashov, AS AF Bazykin, Georgii A. Kondrashov, Fyodor A. Brudno, Michael Poliakov, Alexander Dubchak, Inna Kondrashov, Alexey S. TI Extensive parallelism in protein evolution SO BIOLOGY DIRECT LA English DT Article ID AMINO-ACID SUBSTITUTIONS; MAMMALIAN EVOLUTION; POSITIVE SELECTION; SEQUENCE; MUTATIONS; VARIABILITY; SITES; PHYLOGENOMICS; INFORMATION; ALIGNMENT AB Background: Independently evolving lineages mostly accumulate different changes, which leads to their gradual divergence. However, parallel accumulation of identical changes is also common, especially in traits with only a small number of possible states. Results: We characterize parallelism in evolution of coding sequences in three four-species sets of genomes of mammals, Drosophila, and yeasts. Each such set contains two independent evolutionary paths, which we call paths I and II. An amino acid replacement which occurred along path I also occurs along path II with the probability 50-80% of that expected under selective neutrality. Thus, the per site rate of parallel evolution of proteins is several times higher than their average rate of evolution, but still lower than the rate of evolution of neutral sequences. This deficit may be caused by changes in the fitness landscape, leading to a replacement being possible along path I but not along path II. However, constant, weak selection assumed by the nearly neutral model of evolution appears to be a more likely explanation. Then, the average coefficient of selection associated with an amino acid replacement, in the units of the effective population size, must exceed similar to 0.4, and the fraction of effectively neutral replacements must be below similar to 30%. At a majority of evolvable amino acid sites, only a relatively small number of different amino acids is permitted. Conclusion: High, but below-neutral, rates of parallel amino acid replacements suggest that a majority of amino acid replacements that occur in evolution are subject to weak, but non-trivial, selection, as predicted by Ohta's nearly-neutral theory. Reviewers: This article was reviewed by John McDonald (nominated by Laura Landweber), Sarah Teichmann and Subhajyoti De, and Chris Adami. C1 Univ Michigan, Inst Life Sci, Ann Arbor, MI 48109 USA. Univ Michigan, Dept Ecol & Evolutionary Biol, Ann Arbor, MI 48109 USA. Joint Genome Inst, Dept Energy, Walnut Creek, CA 94598 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Toronto, Dept Comp Sci, Toronto, ON M5S 3J4, Canada. Univ Toronto, Banting & Best Dept Med Res, Toronto, ON M5S 3J4, Canada. Univ Calif San Diego, Sect Ecol Behav & Evolut, La Jolla, CA 92093 USA. Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA. Russian Acad Sci, Inst Informat Transmiss Problems, Kharkevich Inst, Moscow 127994, Russia. RP Kondrashov, AS (reprint author), Univ Michigan, Inst Life Sci, Ann Arbor, MI 48109 USA. EM gbazykin@princeton.edu; fkondrashov@ucsd.edu; brudno@cs.toronto.edu; avpoliakov@lbl.gov; ildubchak@lbl.gov; kondrash@umich.edu RI Bazykin, Georgii/E-4601-2012; Kondrashov, Fyodor Alexeevich/H-6331-2015 OI Bazykin, Georgii/0000-0003-2334-2751; Kondrashov, Fyodor Alexeevich/0000-0001-8243-4694 FU NHLBI NIH HHS [HL066681, U01 HL066681] NR 41 TC 18 Z9 18 U1 0 U2 3 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1745-6150 J9 BIOL DIRECT JI Biol. Direct PD AUG 16 PY 2007 VL 2 AR 20 DI 10.1186/1745-6150-2-20 PG 13 WC Biology SC Life Sciences & Biomedicine - Other Topics GA 219MU UT WOS:000250090100001 PM 17705846 ER PT J AU Thorne, PW Parker, DE Santer, BD McCarthy, MP Sexton, DMH Webb, MJ Murphy, JM Collins, M Titchner, HA Jones, GS AF Thorne, P. W. Parker, D. E. Santer, B. D. McCarthy, M. P. Sexton, D. M. H. Webb, M. J. Murphy, J. M. Collins, M. Titchner, H. A. Jones, G. S. TI Tropical vertical temperature trends: A real discrepancy? SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID MICROWAVE SOUNDING UNIT; TROPOSPHERIC TEMPERATURE; TIME-SERIES; CLIMATE; MSU; UNCERTAINTIES; ATMOSPHERE; BIASES AB We examine the sensitivity of modeled and observed tropical tropospheric temperature trend amplification ( the ratio of T2LT "lower troposphere'' to surface changes) to several sources of uncertainty. Model behaviour is robust across a large perturbed physics ensemble of HadCM3, yielding a smaller amplification range ( 1.44 +/- 0.06) than a previous multi- model ensemble ( 1.41 +/- 0.24). The uncertainty of inter- satellite calibration implied by available MSU T-2 ( mid- troposphere) estimates ( sigma = 0.035K) is much greater than that required to adequately resolve the trend ( sigma < 0.01K), or the amplification behaviour ( implied amplification range +/- 0.95). Trend amplification uncertainty in both models and observations decreases as the timescale increases. Depending upon choice of dataset and time period, uncertainty in trend amplification estimates over 21 years lies between +/- 1.5 and +/- 0.2. C1 Met Off, Hadley Ctr, Exeter EX1 3PB, Devon, England. Lawrence Livermore Natl Lab, Program Climate Model Diag & Intercomparison, Livermore, CA 94550 USA. RP Thorne, PW (reprint author), Met Off, Hadley Ctr, Exeter EX1 3PB, Devon, England. EM peter.thorne@metoffice.gov.uk RI Santer, Benjamin/F-9781-2011; Jones, Gareth/H-8022-2013; Thorne, Peter/F-2225-2014; Collins, Matthew/F-8473-2011 OI Thorne, Peter/0000-0003-0485-9798; Collins, Matthew/0000-0003-3785-6008 NR 28 TC 12 Z9 12 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 EI 1944-8007 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD AUG 16 PY 2007 VL 34 IS 16 AR L61702 DI 10.1029/2007GL029875 PG 5 WC Geosciences, Multidisciplinary SC Geology GA 202IZ UT WOS:000248896500004 ER PT J AU Luo, WF Stewart, K AF Luo, Weifang Stewart, Ken TI Characterization of NH3 formation in desorption of Li-Mg-N-H storage system SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE hydrogen storage materials; gas-solid reaction; NH3 formation; cyclic stability ID HYDROGEN STORAGE; H-2; DESTABILIZATION; IMIDES; LINH2 AB Hydrogen energy may provide the means to an environmentally friendly future. One of the problems related to its application for transportation is "on board" storage. Hydrogen storage in solids has long been recognized as one of the most practical approaches for this. Recently the hydrogen storage system, (Li3N + 2H(2) reversible arrow LiNH2 + 2LiH), was introduced by Chen et al. [P. Chen, Z. Xiong, J. Luo, J. Lin, K.L. Tan, Nature 420 (2002) 302-304. [1]]. This type of material has attracted a great attention of the researchers from the metal hydride research community due to its high reversible storage capacity, up to 11.5 wt%. Currently the Li-Mg-N-H system has been shown to be able to deliver 5.2 wt% reversibly at a H-2 pressure of 30 bar and temperature of 200 degrees C. The accessibility of the capacity beyond 5.2 wt% is being actively explored. One of the issues related to the application of the metal-N-H storage systems is NH3 formation that takes place simultaneously with H-2 release. NH3 formation will not only damage the catalyst in a fuel cell, but also accelerate the cyclic instability of the H-storage material since the metal-N-H system turns into a metal-H system after loosing nitrogen and, therefore, it would not function at the temperature and pressure range designed for the metal-N-H system. The accurate determination of the amounts of NH3 in the H, is, therefore, very important and has not been previously reported. Here a novel method to quantify NH3 in the desorbed H-2, the Draeger Tube, is reported as being suitable for this purpose. The results indicate that the concentration of NH3 in desorbed H-2 increases with the desorption temperature. For the (2LiNH(2) + MgH2) system the NH3 concentration was found to be 180 ppm at 180 degrees C and 720 ppm at 240 degrees C. (c) 2006 Elsevier B.V. All rights reserved. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Luo, WF (reprint author), Sandia Natl Labs, MS 9403,7011 East Ave, Livermore, CA 94551 USA. EM wluo@sandia.gov NR 17 TC 38 Z9 38 U1 3 U2 13 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD AUG 16 PY 2007 VL 440 IS 1-2 BP 357 EP 361 DI 10.1016/j.jallcom.2006.09.057 PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 189ZU UT WOS:000248028300070 ER PT J AU Luo, S Flanagan, TB Luo, W AF Luo, S. Flanagan, Ted B. Luo, W. TI The effect of exposure of the H-storage system (LiNH2+MgH2) to water-saturated air SO JOURNAL OF ALLOYS AND COMPOUNDS LA English DT Article DE hydrogen absorbing materials; kinetics ID HYDROGEN STORAGE; IMIDES AB The H-storage system, (LiNH2 + MgH2), has been exposed to water-saturated air and its subsequent rates of H-2 desorption and absorption have been determined. Not only are there no adverse effects of the exposures, but also there is a small positive effect on the rates and final wt% H. (c) 2006 Elsevier B.V. All rights reserved. C1 Univ Vermont, Dept Chem, Burlington, VT 05401 USA. Sandia Natl Labs, Livermore, CA 94550 USA. RP Flanagan, TB (reprint author), Univ Vermont, Dept Chem, Burlington, VT 05401 USA. EM Ted.Flanagan@uvm.edu NR 8 TC 15 Z9 16 U1 0 U2 3 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-8388 J9 J ALLOY COMPD JI J. Alloy. Compd. PD AUG 16 PY 2007 VL 440 IS 1-2 BP L13 EP L17 DI 10.1016/j.jallcom.2006.09.026 PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Chemistry; Materials Science; Metallurgy & Metallurgical Engineering GA 189ZU UT WOS:000248028300004 ER PT J AU Jagoda-Cwiklik, B Wang, XB Woo, HK Yang, J Wang, GJ Zhou, MF Jungwirth, P Wang, LS AF Jagoda-Cwiklik, Barbara Wang, Xue-Bin Woo, Hin-Koon Yang, Jie Wang, Guan-Jun Zhou, Mingfei Jungwirth, Pavel Wang, Lai-Sheng TI Microsolvation of the Dicyanamide Anion: [N(CN)(2)(-)](H2O)(n) (n=0-12) SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID DOUBLY-CHARGED ANION; PHOTOELECTRON-SPECTROSCOPY; VIBRATIONAL SPECTROSCOPY; POWDER DIFFRACTION; CRYSTAL-STRUCTURE; WATER CLUSTERS; FORCE-FIELD; X-RAY; SOLVATION; ION AB Photoelectron spectroscopy is combined with ab initio calculations to study the microsolvation of the dicyanamide anion, N(CN)(2)(-). Photoelectron spectra of [N(CN)(2)(-)](H2O)(n) (n = 0-12) have been measured at room temperature and also at low temperature for n = 0-4. Vibrationally resolved photoelectron spectra are obtained for N(CN)(2)(-), allowing the electron affinity of the N(CN)(2) radical to be determined accurately as 4.135 +/- 0.010 eV. The electron binding energies and the spectral width of the hydrated clusters are observed to increase with the number of water molecules. The first five waters are observed to provide significant stabilization to the solute, whereas the stabilization becomes weaker for n > 5. The spectral width, which carries information about the solvent reorganization upon electron detachment in [N(CN)(2)(-)](H2O)(n), levels off for n > 6. Theoretical calculations reveal several close-lying isomers for n = 1 and 2 due to the fact that the N(CN)(2)(-) anion possesses three almost equivalent hydration sites. In all the hydrated clusters, the most stable structures consist of a water cluster solvating one end of the N(CN)(2)(-) anion. C1 Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Dept Chem, Shanghai 200433, Peoples R China. Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Laser Chem Inst, Shanghai 200433, Peoples R China. Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. Washington State Univ, Dept Phys, Richland, WA 99354 USA. Ctr Biomol & Complex Mol Syst, Prague 16610 6, Czech Republic. Acad Sci Czech Republic, Inst Organ Chem & Biochem, CR-16610 Prague 6, Czech Republic. RP Zhou, MF (reprint author), Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Dept Chem, Shanghai 200433, Peoples R China. EM mfzhou@fudan.edu.cn; pavel.jungwirth@uochb.cas.cz; ls.wang@pnl.gov RI Jungwirth, Pavel/D-9290-2011 OI Jungwirth, Pavel/0000-0002-6892-3288 NR 33 TC 15 Z9 15 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 16 PY 2007 VL 111 IS 32 BP 7719 EP 7725 DI 10.1021/jp071832n PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 198WK UT WOS:000248658000006 PM 17658734 ER PT J AU Katan, C Tretiak, S Werts, MHV Bain, AJ Marsh, RJ Leonczek, N Nicolaou, N Badaeva, E Mongin, O Blanchard-Desce, M AF Katan, Claudine Tretiak, Sergei Werts, Martinus H. V. Bain, Angus J. Marsh, Richard J. Leonczek, Nicholas Nicolaou, Nicholas Badaeva, Ekaterina Mongin, Olivier Blanchard-Desce, Mireille TI Two-photon transitions in quadrupolar and branched chromophores: Experiment and theory SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Review ID DENSITY-FUNCTIONAL THEORY; ABSORPTION CROSS-SECTIONS; STRUCTURE-PROPERTY RELATIONSHIPS; TRANSFER EXCITED-STATES; CHARGE-TRANSFER; COOPERATIVE ENHANCEMENT; ENERGY-TRANSFER; ONE-PHOTON; TRIPHENYLBENZENE DERIVATIVES; SUBSTITUTED TRIPHENYLBENZENE AB A combined experimental and theoretical study is conducted on a series of model compounds in order to assess the combined role of branching and charge symmetry on absorption, photoluminescence, and two-photon absorption (TPA) properties. The main issue of this study is to examine how branching of quadrupolar chomophores can lead to different consequences as compared to branching of dipolar chromophores. Hence, three structurally related pi-conjugated quadrupolar chromophores symmetrically substituted with donor end groups and one branched structure built from the assembly of three quadrupolar branches via a common donor moiety are used as model compounds. Their photophysical properties are studied using UV-vis spectroscopy, and the TPA spectra are determined through two-photon excited fluorescence experiments using femtosecond pulses in the 500-1000 nm range. Experimental studies are complemented by theoretical calculations. The applied theoretical methodology is based on time-dependent density functional theory, the Frenkel exciton model, and analysis in terms of the natural transition orbitals of relevant electronic states. Theory reveals that a symmetrical intramolecular charge transfer from the terminal donating groups to the middle of the molecule takes place in all quadrupolar chromophores upon photoexcitation. In contrast, branching via a central electron-donating triphenylamine moiety breaks the quadrupolar symmetry of the branches. Consequently, all Frank-Condon excited states have significant asymmetric multidimensional charge-transfer character upon excitation. Subsequent vibrational relaxation of the branched chromophore in the excited state leads to a localization of the excitation and fluorescence stemming from a single branch. As opposed to what was earlier observed when dipolar chromophores are branched via the same common electron-donating moiety, we find only a slight enhancement of the maximum TPA response of the branched compound with respect to an additive contribution of its quadrupolar branches. In contrast, substantial modifications of the spectral shape are observed. This is attributed to the subtle interplay of interbranch electronic coupling and asymmetry caused by branching. C1 Univ Rennes 1, CNRS, UMR 6510, F-35042 Rennes, France. UCL, Dept Phys & Astron, London WC1E 6BT, England. Univ Washington, Dept Chem, Seattle, WA 98195 USA. Los Alamos Natl Lab, Div Theoret, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Theoret, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA. RP Katan, C (reprint author), Univ Rennes 1, CNRS, UMR 6510, Campus Beaulieu,Bat 10A,Case 1003, F-35042 Rennes, France. EM Claudine.Katan@univ-rennes1.fr; Mireille.Blanchard-Desce@univ-rennes1.fr RI Tretiak, Sergei/B-5556-2009; Werts, Martinus/B-9066-2015; KATAN, Claudine/I-9446-2012 OI Tretiak, Sergei/0000-0001-5547-3647; Werts, Martinus/0000-0003-1965-8876; KATAN, Claudine/0000-0002-2017-5823 NR 110 TC 87 Z9 88 U1 2 U2 38 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 16 PY 2007 VL 111 IS 32 BP 9468 EP 9483 DI 10.1021/jp071069x PG 16 WC Chemistry, Physical SC Chemistry GA 198WM UT WOS:000248658200009 PM 17658741 ER PT J AU Duffin, AM Saykally, RJ AF Duffin, Andrew M. Saykally, Richard J. TI Electrokinetic hydrogen generation from liquid water microjets SO JOURNAL OF PHYSICAL CHEMISTRY C LA English DT Article ID STREAMING CURRENT; METAL-ELECTRODE; HYDRONIUM IONS; SURFACES; AG(111); ENERGY; FLOW AB We describe a method for generating molecular hydrogen directly from the charge separation effected via rapid flow of liquid water through a metal orifice, wherein the input energy is the hydrostatic pressure times the volume flow rate. Both electrokinetic currents and hydrogen production rates are shown to follow simple equations derived from the overlap of the fluid velocity gradient and the anisotropic charge distribution resulting from selective adsorption of hydroxide ions to the nozzle surface. Pressure-driven fluid flow shears away charge balancing hydronium ions from the diffuse double layer and carries them out of the aperture. Downstream neutralization of the excess protons at a grounded target electrode produces gaseous hydrogen molecules. The hydrogen production efficiency is currently very low (ca. 10-6) for a single cylindrical jet but can be improved with design changes. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94618 USA. RP Saykally, RJ (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM saykally@berkeley.edu NR 25 TC 22 Z9 23 U1 0 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1932-7447 J9 J PHYS CHEM C JI J. Phys. Chem. C PD AUG 16 PY 2007 VL 111 IS 32 BP 12031 EP 12037 DI 10.1021/jp072994m PG 7 WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 198WQ UT WOS:000248658600040 ER PT J AU Mattingly, MCK Jechow, M Pavel, N Molina, AGY Antonelli, S Antonioli, P Bari, G Basile, M Bellagamba, L Bindi, M Boscherini, D Bruni, A Bruni, G Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Iacobucci, G Margotti, A Nania, R Polini, A Sartorelli, G Zichichi, A Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Jakob, HP Jungst, M Kind, OM Nuncio-Quiroz, AE Paul, E Renner, R Samson, U Schonberg, V Shehzadi, R Wlasenko, M Brook, NH Heath, GP Morris, JD Namsoo, T Capua, M Fazio, S Mastroberardino, A Schioppa, M Susinno, G Tassi, E Kim, JY Ma, KJ Ibrahim, ZA Kamaluddin, B Abdullah, WATW Ning, Y Ren, Z Sciulli, F Chwastowski, J Eskreys, A Figiel, J Galas, A Gil, M Olkiewicz, K Stopa, P Zawiejski, L Adamczyk, L Bold, T Grabowska-Bold, I Kisielewska, D Lukasik, J Przybycien, M Suszycki, L Kotanski, A Slominski, W Adler, V Behrens, U Bloch, I Blohm, C Bonato, A Borras, K Ciesielski, R Coppola, N Dossanov, A Drugakov, V Fourletova, J Geiser, A Gladkov, D Gottlicher, P Grebenyuk, J Gregor, I Haas, T Hain, W Horn, C Huttmann, A Kahle, B Katkov, II Klein, U Kotz, U Kowalski, H Lobodzinska, E Lohr, B Mankel, R Melzer-Pellmann, IA Miglioranzi, S Montanari, A Notz, D Rinaldi, L Roloff, P Rubinsky, I Santamarta, R Schneekloth, U Spiridonov, A Stadie, H Szuba, D Szuba, J Theedt, T Wolf, G Wrona, K Youngman, C Zeuner, W Lohmann, W Schlenstedt, S Barbagli, G Gallo, E Pelfer, PG Bamberger, A Dobur, D Karstens, F Vlasov, NN Bussey, PJ Doyle, AT Dunne, W Ferrando, J Forrest, M Saxon, DH Skillicorn, IO Gialas, I Papageorgiu, K Gosau, T Holm, U Klanner, R Lohrmann, E Salehi, H Schleper, P Schorner-Sadenius, T Sztuk, J Wichmann, K Wick, K Foudas, C Fry, C Long, KR Tapper, AD Kataoka, M Matsumoto, T Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Aushev, V Son, D de Favereau, J Piotrzkowski, K Barreiro, F Glasman, C Jimenez, M Labarga, L del Peso, J Ron, E Soares, M Terron, J Zambrana, M Corriveau, F Liu, C Walsh, R Zhou, C Tsurugai, T Antonov, A Dolgoshein, BA Sosnovtsev, V Stifutkin, A Suchkov, S Dementiev, RK Ermolov, PF Gladilin, LK Khein, LA Korzhavina, IA Kuzmin, VA Levchenko, BB Lukina, OY Proskuryakov, AS Shcheglova, LM Zotkin, DS Zotkin, SA Abt, I Buttner, C Caldwell, A Kollar, D Schmidke, WB Sutiak, J Grigorescu, G Keramidas, A Koffeman, E Kooijman, P Pellegrino, A Tiecke, H Vazquez, M Wiggers, L Brummer, N Bylsma, B Durkin, LS Lee, A Ling, TY Allfrey, PD Bell, MA Cooper-Sarkar, AM Cottrell, A Devenish, RCE Foster, B Korcsak-Gorzo, K Patel, S Roberfroid, V Robertson, A Straub, PB Uribe-Estrada, C Walczak, R Bellan, P Bertolin, A Brugnera, R Carlin, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Stanco, L Turcato, M Oh, BY Raval, A Ukleja, J Whitmore, JJ Iga, Y D'Agostini, G Marini, G Nigro, A Cole, JE Hart, JC Abramowicz, H Gabareen, A Ingbir, R Kananov, S Levy, A Kuze, M Maeda, J Hori, R Kagawa, S Okazaki, N Shimizu, S Tawara, T Hamatsu, R Kaji, H Kitamura, S Ota, O Ri, YD Ferrero, MI Monaco, V Sacchi, R Solano, A Ameodo, M Ruspa, M Fourletov, S Martin, JF Boutle, SK Butterworth, JM Gwenlan, C Jones, TW Loizides, JH Sutton, MR Wing, M Brzozowska, B Ciborowski, J Grzelak, G Kulinski, P Luzniak, P Malka, J Nowak, RJ Pawlak, JM Tymieniecka, T Ukleja, A Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Giller, I Hochman, D Karshon, U Rosin, M Brownson, E Danielson, T Everett, A Kcira, D Reeder, DD Ryan, P Savin, AA Smith, WH Wolfe, H Bhadra, S Catterall, CD Cui, Y Hartner, G Menary, S Noor, U Standage, J Whyte, J AF Mattingly, M. C. K. Jechow, M. Pavel, N. Molina, A. G. Yaguees Antonelli, S. Antonioli, P. Bari, G. Basile, M. Bellagamba, L. Bindi, M. Boscherini, D. Bruni, A. Bruni, G. Cifarelli, L. Cindolo, F. Contin, A. Corradi, M. De Pasquale, S. Iacobucci, G. Margotti, A. Nania, R. Polini, A. Sartorelli, G. Zichichi, A. Bartsch, D. Brock, I. Goers, S. Hartmann, H. Hilger, E. Jakob, H.-P. Juengst, M. Kind, O. M. Nuncio-Quiroz, A. E. Paul, E. Renner, R. Samson, U. Schoenberg, V. Shehzadi, R. Wlasenko, M. Brook, N. H. Heath, G. P. Morris, J. D. Namsoo, T. Capua, M. Fazio, S. Mastroberardino, A. Schioppa, M. Susinno, G. Tassi, E. Kim, J. Y. Ma, K. J. Ibrahim, Z. A. Kamaluddin, B. Abdullah, W. A. T. Wan Ning, Y. Ren, Z. Sciulli, F. Chwastowski, J. Eskreys, A. Figiel, J. Galas, A. Gil, M. Olkiewicz, K. Stopa, P. Zawiejski, L. Adamczyk, L. Bold, T. Grabowska-Bold, I. Kisielewska, D. Lukasik, J. Przybycien, M. Suszycki, L. Kotanski, A. Slominski, W. Adler, V. Behrens, U. Bloch, I. Blohm, C. Bonato, A. Borras, K. Ciesielski, R. Coppola, N. Dossanov, A. Drugakov, V. Fourletova, J. Geiser, A. Gladkov, D. Goettlicher, P. Grebenyuk, J. Gregor, I. Haas, T. Hain, W. Horn, C. Huettmann, A. Kahle, B. Katkov, I. I. Klein, U. Koetz, U. Kowalski, H. Lobodzinska, E. Loehr, B. Mankel, R. Melzer-Pellmann, I.-A. Miglioranzi, S. Montanari, A. Notz, D. Rinaldi, L. Roloff, P. Rubinsky, I. Santamarta, R. Schneekloth, U. Spiridonov, A. Stadie, H. Szuba, D. Szuba, J. Theedt, T. Wolf, G. Wrona, K. Youngman, C. Zeuner, W. Lohmann, W. Schlenstedt, S. Barbagli, G. Gallo, E. Pelfer, P. G. Bamberger, A. Dobur, D. Karstens, F. Vlasov, N. N. Bussey, P. J. Doyle, A. T. Dunne, W. Ferrando, J. Forrest, M. Saxon, D. H. Skillicorn, I. O. Gialas, I. Papageorgiu, K. Gosau, T. Holm, U. Klanner, R. Lohrmann, E. Salehi, H. Schleper, P. Schoerner-Sadenius, T. Sztuk, J. Wichmann, K. Wick, K. Foudas, C. Fry, C. Long, K. R. Tapper, A. D. Kataoka, M. Matsumoto, T. Nagano, K. Tokushuku, K. Yamada, S. Yamazaki, Y. Barakbaev, A. N. Boos, E. G. Pokrovskiy, N. S. Zhautykov, B. O. Aushev, V. Son, D. de Favereau, J. Piotrzkowski, K. Barreiro, F. Glasman, C. Jimenez, M. Labarga, L. del Peso, J. Ron, E. Soares, M. Terron, J. Zambrana, M. Corriveau, F. Liu, C. Walsh, R. Zhou, C. Tsurugai, T. Antonov, A. Dolgoshein, B. A. Sosnovtsev, V. Stifutkin, A. Suchkov, S. Dementiev, R. K. Ermolov, P. F. Gladilin, L. K. Khein, L. A. Korzhavina, I. A. Kuzmin, V. A. Levchenko, B. B. Lukina, O. Yu. Proskuryakov, A. S. Shcheglova, L. M. Zotkin, D. S. Zotkin, S. A. Abt, I. Buettner, C. Caldwell, A. Kollar, D. Schmidke, W. B. Sutiak, J. Grigorescu, G. Keramidas, A. Koffeman, E. Kooijman, P. Pellegrino, A. Tiecke, H. Vazquez, M. Wiggers, L. Bruemmer, N. Bylsma, B. Durkin, L. S. Lee, A. Ling, T. Y. Allfrey, P. D. Bell, M. A. Cooper-Sarkar, A. M. Cottrell, A. Devenish, R. C. E. Foster, B. Korcsak-Gorzo, K. Patel, S. Roberfroid, V. Robertson, A. Straub, P. B. Uribe-Estrada, C. Walczak, R. Bellan, P. Bertolin, A. Brugnera, R. Carlin, R. Dal Corso, F. Dusini, S. Garfagnini, A. Limentani, S. Longhin, A. Stanco, L. Turcato, M. Oh, B. Y. Raval, A. Ukleja, J. Whitmore, J. J. Iga, Y. D'Agostini, G. Marini, G. Nigro, A. Cole, J. E. Hart, J. C. Abramowicz, H. Gabareen, A. Ingbir, R. Kananov, S. Levy, A. Kuze, M. Maeda, J. Hori, R. Kagawa, S. Okazaki, N. Shimizu, S. Tawara, T. Hamatsu, R. Kaji, H. Kitamura, S. Ota, O. Ri, Y. D. Ferrero, M. I. Monaco, V. Sacchi, R. Solano, A. Ameodo, M. Ruspa, M. Fourletov, S. Martin, J. F. Boutle, S. K. Butterworth, J. M. Gwenlan, C. Jones, T. W. Loizides, J. H. Sutton, M. R. Wing, M. Brzozowska, B. Ciborowski, J. Grzelak, G. Kulinski, P. Luzniak, P. Malka, J. Nowak, R. J. Pawlak, J. M. Tymieniecka, T. Ukleja, A. Zarnecki, A. F. Adamus, M. Plucinski, P. Eisenberg, Y. Giller, I. Hochman, D. Karshon, U. Rosin, M. Brownson, E. Danielson, T. Everett, A. Kcira, D. Reeder, D. D. Ryan, P. Savin, A. A. Smith, W. H. Wolfe, H. Bhadra, S. Catterall, C. D. Cui, Y. Hartner, G. Menary, S. Noor, U. Standage, J. Whyte, J. TI Bose-Einstein correlations of charged and neutral kaons in deep inelastic scattering at HERA SO PHYSICS LETTERS B LA English DT Article ID CENTRAL TRACKING DETECTOR; ZEUS BARREL CALORIMETER; PARTICLE PHYSICS; REAR CALORIMETER; Z(0) DECAYS; CONSTRUCTION; DESIGN; PAIRS; PHOTOPRODUCTION; INTERFEROMETRY AB Bose-Einstein correlations of charged and neutral kaons have been measured in e(+/-) p deep inelastic scattering with an integrated luminosity of 121 pb(-1) using the ZEUS detector at HERA. The two-particle correlation function was studied as a function of the four-momentum difference of the kaon pairs, Q(12) = root -(P-1-P-2)(2), assuming a Gaussian shape for the particle source. The values of the radius of the production volume, r, and of the correlation strength lambda, were obtained for both neutral and charged kaons. The radii for charged and neutral kaons are similar and are consistent with those obtained at LEP. (c) 2007 Elsevier B.V. All rights reserved. C1 Humboldt Univ, Inst Phys, Berlin, Germany. Argonne Natl Lab, Argonne, IL 60439 USA. Andrews Univ, Berrien Springs, MI 49104 USA. Univ Bologna, Bologna, Italy. Ist Nazl Fis Nucl, Bologna, Italy. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Bristol, HH Wills Phys Lab, Bristol, Avon, England. Univ Calabria, Dept Phys, I-87036 Cosenza, Italy. Ist Nazl Fis Nucl, Cosenza, Italy. Chonnam Natl Univ, Kwangju, South Korea. Univ Malaya, Kuala Lumpur 50603, Malaysia. Columbia Univ, Nevis Labs, New York, NY 10027 USA. Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Krakow, Poland. AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Krakow, Poland. Jagiellonian Univ, Dept Phys, Krakow, Poland. DESY, Hamburg, Germany. DESY, Zeuthen, Germany. Univ Florence, Florence, Italy. Ist Nazl Fis Nucl, I-50125 Florence, Italy. Univ Freiburg, Fac Phys, Freiburg, Germany. Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland. Univ Aegean, Dept Engn Management & Finance, Aegean, Greece. Univ Hamburg, Inst Expt Phys, Hamburg, Germany. Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England. KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan. Minist Educ Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan. Natl Acad Sci, Nucl Res Inst, Kiev, Ukraine. Kiev Natl Univ, Kiev, Ukraine. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu, South Korea. Catholic Univ Louvain, Inst Phys Nucl, B-1348 Louvain, Belgium. Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain. McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan. Moscow Phys Engn Inst, Moscow, Russia. Moscow MV Lomonosov State Univ, Inst Phys Nucl, Moscow, Russia. Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. NIKHEF, Amsterdam, Netherlands. Univ Amsterdam, Amsterdam, Netherlands. Ohio State Univ, Dept Phys, Columbus, OH 43210 USA. Univ Oxford, Dept Phys, Oxford, England. Ist Nazl Fis Nucl, Padua, Italy. Univ Padua, Dipartimento Fis, Padua, Italy. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Polytech Univ, Sagamihara, Kanagawa, Japan. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, Rome, Italy. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel. Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan. Univ Turin, Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Piemonte Orientale, Novara, Italy. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. UCL, Dept Phys & Astron, London, England. Warsaw Univ, Inst Expt Phys, Warsaw, Poland. Inst Nucl Studies, PL-00681 Warsaw, Poland. Weizmann Inst Sci, Dept Particle Phys, Rehovot, Israel. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. York Univ, Dept Phys, N York, ON M3J 1P3, Canada. Inst Theoret & Expt Phys, Moscow 117259, Russia. INP, Krakow, Poland. CERN, Geneva, Switzerland. Univ Lodz, PL-90131 Lodz, Poland. RP Gallo, E (reprint author), Humboldt Univ, Inst Phys, Berlin, Germany. EM gallo@mail.desy.de RI Tassi, Enrico/K-3958-2015; dusini, stefano/J-3686-2012; Fazio, Salvatore /G-5156-2010; Doyle, Anthony/C-5889-2009; Capua, Marcella/A-8549-2015; De Pasquale, Salvatore/B-9165-2008; Dementiev, Roman/K-7201-2012; Wiggers, Leo/B-5218-2015; Wing, Matthew/C-2169-2008; IBRAHIM, ZAINOL ABIDIN/C-1121-2010; WAN ABDULLAH, WAN AHMAD TAJUDDIN/B-5439-2010; Bloch, Immanuel/G-3174-2010; Ferrando, James/A-9192-2012; Gladilin, Leonid/B-5226-2011; Levchenko, B./D-9752-2012; Proskuryakov, Alexander/J-6166-2012 OI dusini, stefano/0000-0002-1128-0664; Doyle, Anthony/0000-0001-6322-6195; Capua, Marcella/0000-0002-2443-6525; Arneodo, Michele/0000-0002-7790-7132; Longhin, Andrea/0000-0001-9103-9936; Raval, Amita/0000-0003-0164-4337; De Pasquale, Salvatore/0000-0001-9236-0748; Wiggers, Leo/0000-0003-1060-0520; Bloch, Immanuel/0000-0002-0679-4759; Ferrando, James/0000-0002-1007-7816; Gladilin, Leonid/0000-0001-9422-8636; NR 44 TC 11 Z9 11 U1 0 U2 2 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 AUG 16 PY 2007 VL 652 IS 1 BP 1 EP 12 DI 10.1016/j.physietb.2007.06.052 PG 12 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 208PI UT WOS:000249331300001 ER PT J AU Chen, MC Mahanthappa, KT AF Chen, Mu-Chun Mahanthappa, K. T. TI CKM and tri-bimaximal MNS matrices in a SU(5) x T-(d) model SO PHYSICS LETTERS B LA English DT Article ID A(4) FAMILY SYMMETRY; FERMION MASSES; NEUTRINO AB We propose a model based on SU(5) x T-(d) which successfully gives rise to near tri-bimaximal leptonic mixing as well as realistic CKM matrix elements for the quarks. The Georgi-Jarlskog relations for three generations are also obtained. Due to the (d) T transformation property of the matter fields, the b-quark mass can be generated only when the (d) T symmetry is broken, giving a dynamical origin for the hierarchy between m(b) and m(t). There are only nine operators allowed in the Yukawa sector up to at least mass dimension seven due to an additional Z(12) x Z'(21) symmetry, which also forbids, up to some high orders, operators that lead to proton decay. The resulting model has a total of nine parameters in the charged fermion and neutrino sectors, and hence is very predictive. In addition to the prediction for theta(13) similar or equal to theta(c)/3 root 2, the model gives rise to a sum rule, tan(2) theta(circle dot) similar or equal to tan(2) theta(circle dot,) TBM -1/2 theta(c) cos beta, which is a consequence of the Georgi-Jarlskog relations in the quark sector. This deviation could account for the difference between the experimental best fit value for the solar mixing angle and the value predicted by the tri-bimaximal mixing matrix.(c) 2007 Elsevier B.V. All rights reserved. C1 Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. Dept Theoret Phys, Fermilab, Batavia, IL 60510 USA. Univ Colorado, Dept Phys, Boulder, CO 80309 USA. RP Chen, MC (reprint author), Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. EM mcchen@fnal.gov; ktm@pizero.colorado.edu OI Chen, Mu-Chun/0000-0002-5749-2566 NR 29 TC 168 Z9 168 U1 0 U2 1 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 AUG 16 PY 2007 VL 652 IS 1 BP 34 EP 39 DI 10.1016/j.physletb.2007.06.064 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 208PI UT WOS:000249331300005 ER PT J AU Lobell, DB AF Lobell, David B. TI Changes in diurnal temperature range and national cereal yields SO AGRICULTURAL AND FOREST METEOROLOGY LA English DT Article DE DTR; climate change impacts; maize; wheat; rice ID GLOBAL CLIMATE-CHANGE; MINIMUM TEMPERATURE; SOLAR-RADIATION; CROP PRODUCTION; FUTURE CLIMATE; DAILY MAXIMUM; WHEAT YIELDS; TRENDS; MODEL; SIMULATION AB Models of yield responses to temperature change have often considered only changes in average temperature (T-avg) with the implicit assumption that changes in the diurnal temperature range (DTR; the difference between daily maximum and minimum temperature) can safely be ignored. The goal of this study was to evaluate this assumption using a combination of historical datasets and climate model projections. Data on national crop yields for 1961-2002 in the ten leading producers of wheat (Triticum spp.), rice (Oryza spp.) and maize (Zea mays) were combined with datasets on climate and crop locations to evaluate the empirical relationships between DTR and crop yields. In several rice and maize growing regions, including the two major nations for each crop, there was a clear negative response of yields to increased DTR. This finding reflects a nonlinear response of yields to temperature, which likely results from greater water and heat stress during hot days. In many other cases, the effects of DTR were not statistically significant, in part because correlations of DTR with other climate variables, and the relatively short length of the time series resulted in wide confidence intervals for the estimates. To evaluate whether future changes in DTR are relevant to crop impact assessments, yield responses to projected changes in T-avg and DTR by 2046-2065 from I I climate models were estimated. The mean of climate model projections indicated an increase in DTR in most seasons and locations where wheat is grown, mixed projections for maize, and a general decrease in DTR for rice. These mean projections were associated with wide ranges that included zero in nearly all cases. The estimated impacts of DTR changes on yields were generally small (<5% change in yields) relative to the consistently negative impact of projected warming of T-avg. However, DTR changes did significantly affect yield responses in several cases, such as in reducing US maize yields and increasing India rice yields. Because DTR projections tend to be positively correlated with estimates of yield changes for extreme warming were particularly affected by including DTR (up to 10%). Finally, based on the relatively poor performance of climate models in reproducing the magnitude of past DTR trends, it is possible that future DTR changes and associated yield responses will exceed the ranges considered here. (c) 2007 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Energy Environm Directorate, Livermore, CA 94550 USA. RP Lobell, DB (reprint author), Lawrence Livermore Natl Lab, Energy Environm Directorate, PO Box 808 L-103, Livermore, CA 94550 USA. EM dlobell@llnl.gov NR 36 TC 97 Z9 113 U1 3 U2 47 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-1923 EI 1873-2240 J9 AGR FOREST METEOROL JI Agric. For. Meteorol. PD AUG 15 PY 2007 VL 145 IS 3-4 BP 229 EP 238 DI 10.1016/j.agrformet.2007.05.002 PG 10 WC Agronomy; Forestry; Meteorology & Atmospheric Sciences SC Agriculture; Forestry; Meteorology & Atmospheric Sciences GA 206GD UT WOS:000249171000009 ER PT J AU Fang, N Zhang, H Li, JW Li, HW Yeung, ES AF Fang, Ning Zhang, Hui Li, Jiangwei Li, Hung-Wing Yeung, Edward S. TI Mobility-based wall adsorption isotherms for comparing capillary electrophoresis with single-molecule observations SO ANALYTICAL CHEMISTRY LA English DT Article ID MONTE-CARLO-SIMULATION; DNA-MOLECULES; RECTANGULAR HYPERBOLAE; FLUORESCENCE DETECTION; ZONE-ELECTROPHORESIS; BINDING CONSTANTS; ERROR PROPAGATION; DYNAMICS; MICROSCOPY; INTERFACE AB The adsorption properties of R-phycoerythrin (RPE), an autofluorescent protein, on the fused-silica surface were studied in capillary electrophoresis (CE) and in singlemolecule experiments. The band shapes and migration times were measured in CE, and adsorption and desorption events were recorded at the single-molecule level by imaging within the evanescent field layer using total internal reflection fluorescence microscopy. The adsorbed RPE molecules on the surface of the fused-silica prism were counted with confidence based on lmageJ software. The capacity factor and desorption rate were estimated from the counting results. The mobility-based adsorption isotherms were constructed from both computer simulations and experiments to determine the capacity factor. C1 US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Chem, Ames, IA 50011 USA. RP Yeung, ES (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. EM yeung@ameslab.gov RI Fang, Ning/A-8456-2011; OI Li, Hung Wing/0000-0003-4840-1965 NR 25 TC 31 Z9 32 U1 0 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 15 PY 2007 VL 79 IS 16 BP 6047 EP 6054 DI 10.1021/ac071009n PG 8 WC Chemistry, Analytical SC Chemistry GA 203SC UT WOS:000248993300001 PM 17658767 ER PT J AU Ding, J Sorensen, CM Zhang, QB Jiang, HL Jaitly, N Livesay, EA Shen, YF Smith, RD Metz, TO AF Ding, Jie Sorensen, Christina M. Zhang, Qibin Jiang, Hongliang Jaitly, Navdeep Livesay, Eric A. Shen, Yufeng Smith, Richard D. Metz, Thomas O. TI Capillary LC coupled with high-mass measurement accuracy mass spectrometry for metabolic profiling SO ANALYTICAL CHEMISTRY LA English DT Article ID HYDROPHILIC-INTERACTION CHROMATOGRAPHY; HIGH-THROUGHPUT PROTEOMICS; NEGATIVE-ION FORMATION; LIQUID-CHROMATOGRAPHY; FUNCTIONAL GENOMICS; POLAR COMPOUNDS; SF6 CORONA; IONIZATION; MS; ELECTROPHORESIS AB We have developed an efficient and robust high-pressure capillary LC-MS method for the identification of large numbers of metabolites in biological samples using both positive and negative ESI modes. Initial efforts focused on optimizing the separation conditions for metabolite extracts using various LC stationary phases in conjunction with multiple mobile-phase systems, as applied to the separation of 45 metabolite standards. The optimal mobile and stationary phases of those tested were determined experimentally (in terms of peak shapes, theoretical plates, retention of small, polar compounds, etc.), and both linear and exponential gradients were applied in the study of metabolite extracts from the cyanobacterium Cyanothece sp. ATCC 51142. Finally, an automated dual-capillary LC system was constructed and evaluated for the effectiveness and reproducibility of the chromatographic separations using the above samples. When coupled with a commercial LTQ-orbitrap MS, similar to 900 features were reproducibly detected from Cyanothece sp. ATCC 51142 metabolite extracts. In addition, 12 compounds were tentatively identified, based on accurate mass, isotopic distribution, and MS/MS information. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. RP Metz, TO (reprint author), Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. EM thomas.metz@pnl.gov RI Smith, Richard/J-3664-2012; OI Smith, Richard/0000-0002-2381-2349; Metz, Tom/0000-0001-6049-3968 FU NCRR NIH HHS [RR18522] NR 47 TC 39 Z9 39 U1 1 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 15 PY 2007 VL 79 IS 16 BP 6081 EP 6093 DI 10.1021/ac070080q PG 13 WC Chemistry, Analytical SC Chemistry GA 203SC UT WOS:000248993300005 PM 17636878 ER PT J AU Martin, AN Farquar, GR Frank, M Gard, EE Fergenson, DP AF Martin, Audrey N. Farquar, George R. Frank, Matthias Gard, Eric E. Fergenson, David P. TI Single-particle aerosol mass spectrometry for the detection and identification of chemical warfare agent simulants SO ANALYTICAL CHEMISTRY LA English DT Article ID ORGANOPHOSPHATE NERVE AGENTS; BACILLUS-ATROPHAEUS SPORES; DEGRADATION-PRODUCTS; SPECTRAL SIGNATURES; IONIZATION; CHROMATOGRAPHY; BIOSENSOR; DEFENSE; PHASE; CELLS AB Single-particle aerosol mass spectrometry (SPAMS) was used for the real-time detection of liquid nerve agent simulants. A total of 1000 dual-polarity time-of-flight mass spectra were obtained for micrometer-sized single particles each of dimethyl methyl phosphonate, diethyl ethyl phosphonate, diethyl phosphoramidate, and diethyl phthalate using laser fluences between 0.58 and 7.83 nJ/mu m2, and mass spectral variation with laser fluence was studied. The mass spectra obtained allowed identification of single particles of the chemical warfare agent (CWA) simulants at each laser fluence used although lower laser fluences allowed more facile identification. SPAMS is presented as a promising real-time detection system for the presence of CWAs. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Michigan State Univ, E Lansing, MI 48824 USA. RP Farquar, GR (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM gfarquar@llnl.gov RI Frank, Matthias/O-9055-2014 NR 41 TC 12 Z9 13 U1 0 U2 18 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 15 PY 2007 VL 79 IS 16 BP 6368 EP 6375 DI 10.1021/ac070704s PG 8 WC Chemistry, Analytical SC Chemistry GA 203SC UT WOS:000248993300040 PM 17630721 ER PT J AU Ma, Z Brown, S Overbury, SH Dai, S AF Ma, Zhen Brown, Suree Overbury, Steven H. Dai, Sheng TI Au/PO43-/TiO2 and PO43-/Au/TiO2 catalysts for CO oxidation: Effect of synthesis details on catalytic performance SO APPLIED CATALYSIS A-GENERAL LA English DT Article DE gold catalysis; CO oxidation; titania; phosphate; dopant; sintering; deactivation ID SUPPORTED GOLD CATALYSTS; CARBON-MONOXIDE OXIDATION; ACTIVE AU/TIO2 CATALYSTS; GAS SHIFT CATALYSTS; LOW-TEMPERATURE; AU CATALYSTS; AU/AL2O3 CATALYSTS; MESOPOROUS SILICA; OXIDE SUPPORT; NANOPARTICLES AB Supported gold catalysts are active for CO oxidation, but the high-temperature deactivation is a shortcoming that may constrain their applications. Herein, we attempted to address this problem by using phosphate-doped Au/TiO2 synthesized via two routes. In route I, Au/PO43-/TiO2 catalysts were prepared by treating TiO2 (Degussa P25) with diluted H3PO4, followed by loading gold via deposition-precipitation. In route II, PO43-/Au/TiO2 catalysts were prepared by treating H-2-reduced Au/TiO2 with diluted H3PO4. These catalysts were systematically pretreated at 200 or 500 degrees C before reaction testing. The overall CO conversion on 200 degrees C-pretreated Au/PO43-/TiO2 or PO43- /Au/TiO2 was always lower than that on 200 degrees C-pretreated Au/TiO2. However, the advantage of the phosphate addition became apparent after thermal treatment at a higher temperature. Both Au/PO43-/TiO2 and PO43-/Au/TiO2, pretreated at 500 degrees C retained significant activities at room temperature, whereas 500 degrees C-pretreated Au/ TiO2 lost its activity. Control experiments and catalyst characterization were performed to investigate the impact of synthesis details on catalytic performance. Published by Elsevier B.V. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Dai, S (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM dais@ornl.gov RI Ma, Zhen/F-1348-2010; Overbury, Steven/C-5108-2016; Dai, Sheng/K-8411-2015 OI Ma, Zhen/0000-0002-2391-4943; Overbury, Steven/0000-0002-5137-3961; Dai, Sheng/0000-0002-8046-3931 NR 89 TC 44 Z9 45 U1 1 U2 39 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0926-860X EI 1873-3875 J9 APPL CATAL A-GEN JI Appl. Catal. A-Gen. PD AUG 15 PY 2007 VL 327 IS 2 BP 226 EP 237 DI 10.1016/j.apcata.2007.05.019 PG 12 WC Chemistry, Physical; Environmental Sciences SC Chemistry; Environmental Sciences & Ecology GA 200NG UT WOS:000248769500014 ER PT J AU Salwinski, L Eisenberg, D AF Salwinski, Lukasz Eisenberg, David TI The MiSink plugin: Cytoscape as a graphical interface to the database of interacting proteins SO BIOINFORMATICS LA English DT Article ID SOFTWARE AB The MiSink Plugin converts Cytoscape, an open-source bioinformatics platform for network visualization, to a graphical interface for the database of interacting proteins ( DIP: http://dip.doe-mbi.ucla.edu). Seamless integration is possible by providing bi-directional communication between Cytoscape and any Web site supplying data in XML or tab-delimited format. Availability: MiSink is freely available for download at http://dip. doe-mbi.ucla.edu/Software.cgi Contact: lukasz@mbi.ucla.edu C1 Univ Calif Los Angeles, Howard Hughes Med Inst, DOE Inst Genom & Proteom, Dept Chem & Biochem, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, Howard Hughes Med Inst, DOE Inst Genom & Proteom, Dept Biol Chem, Los Angeles, CA 90095 USA. RP Eisenberg, D (reprint author), Univ Calif Los Angeles, Howard Hughes Med Inst, DOE Inst Genom & Proteom, Dept Chem & Biochem, Box 951570, Los Angeles, CA 90095 USA. EM lukasz@mbi.ucla.edu FU NIGMS NIH HHS [1 R01 GM071909] NR 11 TC 8 Z9 8 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD AUG 15 PY 2007 VL 23 IS 16 BP 2193 EP 2195 DI 10.1093/bioinformatics/btm304 PG 3 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 215OG UT WOS:000249818300025 PM 17553858 ER PT J AU Day-Richter, J Harris, MA Haendel, M AF Day-Richter, John Harris, Midori A. Haendel, Melissa CA Gene Ontology OBO-Edit Grp TI OBO-Edit - an ontology editor for biologists SO BIOINFORMATICS LA English DT Article AB OBO-Edit is an open source, platform-independent ontology editor developed and maintained by the Gene Ontology Consortium. Implemented in Java, OBO-Edit uses a graph-oriented approach to display and edit ontologies. OBO-Edit is particularly valuable for viewing and editing biomedical ontologies. Availability: https://sourceforge.net/project/showfiles.php?group_id = 36855 Contact: gohelp@geneontology.org. C1 Lawrence Berkeley Natl Lab, Berkeley Bioinformat & Ontol Project, Berkeley, CA 94720 USA. EMBL Outstn European Bioinformat Inst, GO Editorial Off, Cambridge CB10 1SD, England. Univ Oregon, Zebrafish Informat Network, Eugene, OR 97403 USA. RP Day-Richter, J (reprint author), Lawrence Berkeley Natl Lab, Berkeley Bioinformat & Ontol Project, Berkeley, CA 94720 USA. RI Smith, Barry/A-9525-2011; OI Smith, Barry/0000-0003-1384-116X; Christie, Karen/0000-0001-5501-853X; Lewis, Suzanna/0000-0002-8343-612X; Haendel, Melissa/0000-0001-9114-8737 NR 8 TC 150 Z9 154 U1 0 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD AUG 15 PY 2007 VL 23 IS 16 BP 2198 EP 2200 DI 10.1093/bioinformatics/btm112 PG 3 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 215OG UT WOS:000249818300027 PM 17545183 ER PT J AU Fowler, JS Alia-Klein, N Kriplani, A Logan, J Williams, B Zhu, W Craig, IW Telang, F Goldstein, R Volkow, ND Vaska, P Wang, GJ AF Fowler, Joanna S. Alia-Klein, Nelly Kriplani, Aarti Logan, Jean Williams, Benjamin Zhu, Wei Craig, Ian W. Telang, Frank Goldstein, Rita Volkow, Nora D. Vaska, Paul Wang, Gene-Jack TI Evidence that brain MAO A activity does not correspond to MAO A genotype in healthy male subjects SO BIOLOGICAL PSYCHIATRY LA English DT Article; Proceedings Paper CT 52nd Annual Meeting of the Society-of-Nuclear-Medicine CY JUN 18-22, 2005 CL Toronto, CANADA SP Soc Nucl Med DE brain MAO activity; MAO A genotype ID MONOAMINE-OXIDASE-A; FUNCTIONAL POLYMORPHISM; SEROTONIN-TRANSPORTER; AGGRESSIVE-BEHAVIOR; GENE PROMOTER; ASSOCIATION; IMPULSIVITY; INHIBITION; EXPRESSION; VIOLENCE AB Background: A functional polymorphism in the promoter region of the monoamine oxidase A (MAO A) gene has two common alleles that are referred to as the high and low MAO A genotypes. We report the first in vivo human study to determine whether there is an association between MAO A genotype and brain MAO A activity in healthy male subjects. Methods: Brain MAO A activity was measured with positron emission tomography and [C-11]clorgyline in 38 healthy adult male nonsmokers genotyped for MAO A polymorphism. Results: There was no significant difference in brain MAO A activity between the high (n = 26) and low (n = 12) MAO A genotypes. Conclusions: The lack of an association between the high and low MAO A genotype and brain MAO A activity suggests that this polymorphism by itself does not contribute to differences in brain MAO A activity in healthy adult male subjects. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Mt Sinai Sch Med, Dept Psychiat, New York, NY USA. Kings Coll London, London WC2R 2LS, England. SUNY Stony Brook, Dept Appl Math & Stat, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Biomed Engn, Stony Brook, NY 11794 USA. NIDA, Bethesda, MD 20892 USA. NIAAA, Rockville, MD 20852 USA. RP Fowler, JS (reprint author), Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. EM fowler@bnl.gov OI Craig, Ian/0000-0002-4063-1005; Logan, Jean/0000-0002-6993-9994 FU NCRR NIH HHS [M01 RR010710, M01 RR010710-11, M01 RR10710]; NIBIB NIH HHS [EB002630, R01 EB002630]; NIDA NIH HHS [K05 DA020001, K05 DA020001-03, K05 DA020001-04, K05 DA02001] NR 26 TC 66 Z9 68 U1 4 U2 6 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0006-3223 J9 BIOL PSYCHIAT JI Biol. Psychiatry PD AUG 15 PY 2007 VL 62 IS 4 BP 355 EP 358 DI 10.1016/j.biopsych.2006.08.038 PG 4 WC Neurosciences; Psychiatry SC Neurosciences & Neurology; Psychiatry GA 198WL UT WOS:000248658100012 PM 17141746 ER PT J AU Liu, CX Jeon, BH Zachara, JM Wang, ZM AF Liu, Chongxuan Jeon, Byong-Hun Zachara, John M. Wang, Zheming TI Influence of calcium on microbial reduction of solid phase uranium(VI) SO BIOTECHNOLOGY AND BIOENGINEERING LA English DT Article DE microbial reduction; dissolution; uranium; speciation; coupled models; immobilization ID U(VI) REDUCTION; HANFORD-SITE; VADOSE ZONE; FLUORESCENCE SPECTROSCOPY; SUBSURFACE SEDIMENTS; REDUCING BACTERIA; COMPLEX-FORMATION; KINETICS; DISSOLUTION; WASHINGTON AB The effect of calcium on the dissolution and microbial reduction of a representative solid phase uranyl [U(Vl)], sodium boltwoodite (NaUO2SiO3OH center dot 1.5H(2)O), was investigated to evaluate the rate-limiting step of microbial reduction of the solid phase U(VI). Microbial reduction experiments were performed in a culture of a dissimilatory metal-reducing bacterium (I)MRB), Shewanella oneidensis strain MR-1, in a bicarbonate medium with lactate as electron donor at PH 6.8 buffered with PIPES. Calcium increased the rate of Na-boltwoodite dissolution and U(VI) bioavailability by increasing its solubility through the formation of a ternary aqueous calcium- uranyl-carbonate species. The ternary species, however, decreased the rates of microbial reduction of aqueous U(VI). Laser-induced fluorescence spectroscopy (LIFS) and transmission electron microscopy (TEM) collectively revealed that microbial reduction of solid phase U(VI) was a sequentially coupled process of Na-boltwoodite dissolution, U(VI) aqueous speciation, and microbial reduction of dissolved U(VI) to U(IV) that accumulated on bacterial surfaces/periplasm. Under studied experimental conditions, the overall rate of microbial reduction of solid phase U(VI) was limited by U(VI) dissolution reactions in solutions without calcium and limited by microbial reduction in solutions with calcium. Generally, the overall rate of microbial reduction of solid phase U(VI) was determined by the coupling of solid phase U(VI) dissolution, U(VI) aqueous speciation, and microbial reduction of dissolved U(VI) that were all affected by calcium. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Yonsei Univ, Wonju 220710, Kangwon, South Korea. RP Liu, CX (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM Chongxuan.liu@pnl.gov RI Liu, Chongxuan/C-5580-2009; Wang, Zheming/E-8244-2010; OI Wang, Zheming/0000-0002-1986-4357; Liu, Chongxuan/0000-0002-2180-6770; Jeon, Byong-Hun/0000-0002-5478-765X NR 27 TC 16 Z9 19 U1 3 U2 10 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0006-3592 J9 BIOTECHNOL BIOENG JI Biotechnol. Bioeng. PD AUG 15 PY 2007 VL 97 IS 6 BP 1415 EP 1422 DI 10.1002/bit.21357 PG 8 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 191UZ UT WOS:000248158800008 PM 17274063 ER PT J AU Bare, SR Yang, N Kelly, SD Mickelson, GE Modica, FS AF Bare, Simon R. Yang, Ning Kelly, Shelly D. Mickelson, George E. Modica, Frank S. TI Design and operation of a high pressure reaction cell for in situ X-ray absorption spectroscopy SO CATALYSIS TODAY LA English DT Article; Proceedings Paper CT 2nd International Congress on Operando Spectroscopy CY APR 23-27, 2006 CL Toledo, SPAIN SP HORIBA Jobin-Yvon, Varian Inc, PID Eng Tech, Avantes/Instrumat, Ocean Opt, Kaiser Opt Syst, Renishaw, Thermo Electron, Bruker, CEPSA, Elsevier, Catal Today, Royal Soc Chem, Spanish Public Organism, CSIC, UNED Univ, Spanisn Minist Educ Sci, Spanish Cataly Soc, UCLM Univ, EU CONCORDE Action, City Toledo, Toledo Convent Bureau DE X-ray absorption; in situ spectroscopy; catalysis ID METHANOL SYNTHESIS; INSITU CELL; CATALYSTS; OXIDATION; CLUSTERS; EXAFS; NANOPARTICLES; GAMMA-AL2O3; MORPHOLOGY; REDUCTION AB X-ray absorption spectroscopy measurements of catalytic reactions have been instrumental in advancing the understanding of catalytic processes. These measurements require an in situ catalysis reaction cell with unique properties. Here we describe the design and initial operation of an in situ/operando catalysis reaction cell for transmission X-ray absorption spectroscopy measurements. The cell is designed: to be an ideal catalytic reactor with no mass transfer effects; to give the same conversion and selectivity under similar space velocities as standard laboratory micro-reactors; to be operational temperatures up to 600 degrees C and pressures up to 14 bar; to be X-ray transparent allowing XAS measurement to be collected in transmission for all elements with Z >= 23 (vanadium K-edge at 5.5 keV); to measure the actual catalyst bed temperature; to not use o-ring seals, or water cooling; to be robust, compact, easy to assemble, and use, and relatively low cost to produce. The heart of the cell is fabricated from an X-ray transparent beryllium tube that forms a plug flow reactor. XAFS data recorded during the reduction of a Re/gamma-Al2O3 catalyst as a function of hydrogen pressure from 0.05 to 8 bar, and from a Pt-Sn/gamma-Al2O3 catalyst during n-heptane reforming are given as initial examples of the versatility of the reactor. (c) 2006 Elsevier B.V. All rights reserved. C1 UOP LLC, Des Plaines, IL 60016 USA. Argonne Natl Lab, Argonne, IL 60439 USA. EXAFS Anal, Bolingbrook, IL 60439 USA. RP Bare, SR (reprint author), UOP LLC, Des Plaines, IL 60016 USA. EM simon.bare@uop.com OI Bare, Simon/0000-0002-4932-0342 NR 37 TC 26 Z9 26 U1 2 U2 30 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5861 EI 1873-4308 J9 CATAL TODAY JI Catal. Today PD AUG 15 PY 2007 VL 126 IS 1-2 BP 18 EP 26 DI 10.1016/j.cattod.2006.10.007 PG 9 WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 205FF UT WOS:000249098700003 ER PT J AU Clark, JC Dai, S Overbury, SH AF Clark, Jason C. Dai, Sheng Overbury, Steven H. TI Operando studies of desorption, reaction and carbonate formation during CO oxidation by Au/TiO2 catalysts SO CATALYSIS TODAY LA English DT Article; Proceedings Paper CT 2nd International Congress on Operando Spectroscopy CY APR 23-27, 2006 CL Toledo, SPAIN SP HORIBA Jobin -Yvon, Varian Inc, PID Eng& Tech, Avantes/Instrumat, Ocean Opt, Kaiser Opt Syst, Renishaw, Thermo Electron, Bruker, CEPSA, Elsevier, Catal Today, Royal Soc Chem, Spanish Public Organism, CSIC, UNED Univ, Spanisn Minist Educ Sci, Spanish Cataly Soc, UCLM Univ, EU CONCORDE Action, City Toledo, Toledo Convent Bureau DE operando conditions; desorption; CO oxidation ID MONOXIDE OXIDATION; FTIR SPECTROSCOPY; PULSE TRANSIENT; GOLD; TIO2; ADSORPTION; SURFACE; ANATASE; STATE; NO AB Gas transient methods have been used to probe reaction pathways in catalytic CO oxidation under operando conditions. A low dead volume reactor is described, which permits monitoring of surface reaction species by repetitive FTIR while using mass spectrometry to continuously monitor reaction products and conversion throughout transient gas switching. CO desorption rates are measured from an active Au/TiO2 catalyst under He and CO2 and are consistent with literature values for CO desorption from An single crystals and Au films on TiO2. The rate of the reactive removal of adsorbed surface CO(a) was used to determine a turnover frequency of about 0.043 s(-1) for CO oxidation on the Au particles, comparable to the rate obtained in a steady state flow reactor. Gas switching is used to investigate the storage of oxygen on the catalyst. It is found that following O-2 exposure, the amount of adsorbed active oxygen is either undetectably small, less than 3.1 mu moles O/g(catal), or it desorbs very rapidly at 298 K. Although storage of oxygen is very ineffective on this catalyst, CO2 is stored by its dynamic interaction with the support to form carbonates or bicarbonates causing slow removal of product CO2 from the reactor bed. These results are summarized by a scheme describing the pathways for CO oxidation. (c) 2006 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Overbury, SH (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. EM overburysh@ornl.gov RI Overbury, Steven/C-5108-2016; Dai, Sheng/K-8411-2015 OI Overbury, Steven/0000-0002-5137-3961; Dai, Sheng/0000-0002-8046-3931 NR 32 TC 29 Z9 29 U1 2 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0920-5861 J9 CATAL TODAY JI Catal. Today PD AUG 15 PY 2007 VL 126 IS 1-2 BP 135 EP 142 DI 10.1016/j.cattod.2006.10.008 PG 8 WC Chemistry, Applied; Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA 205FF UT WOS:000249098700017 ER PT J AU Xu, TF Apps, JA Pruess, K Yamamoto, H AF Xu, Tianfu Apps, John A. Pruess, Karsten Yamamoto, Hajime TI Numerical modeling of injection and mineral trapping Of CO2 with H2S and SO2 in a sandstone formation SO CHEMICAL GEOLOGY LA English DT Review DE CO2 sequestration; acid-gas injection; mineral trapping; numerical simulation; arkose formation ID CARBON-DIOXIDE; AQUIFER DISPOSAL; AQUEOUS-SOLUTION; GEOLOGIC SEQUESTRATION; DISSOLUTION KINETICS; CRYSTAL DISSOLUTION; EASTERN AUSTRALIA; ROCK INTERACTIONS; DENISON TROUGH; FLUID-FLOW AB Carbon dioxide (CO2) injection into deep geologic formations could decrease the atmospheric accumulation of this gas from anthropogenic sources. Furthermore, by co-injecting H2S or S02, the products respectively of coal gasification or combustion, with captured CO2, problems associated with surface disposal would be mitigated. We developed models that simulate the co-injection of H2S or S02 with CO2 into an arkose formation at a depth of about 2 km and 75 degrees C. The hydrogeology and mineralogy of the injected formation are typical of those encountered in Gulf Coast aquifers of the United States. Six numerical simulations of a simplified 1-D radial region surrounding the injection well were performed. The injection Of CO2 alone or co-injection with SO2 or H2S results in a concentrically zoned distribution of secondary minerals surrounding a leached and acidified region adjacent to the injection well. Co-injection Of SO2 with CO2 results in a larger and more strongly acidified zone, and alteration differs substantially from that caused by the co-injection of H2S or injection Of CO2 alone. Precipitation of carbonates occurs within a higher pH (pH > 5) peripheral zone. Significant quantities of CO2 are sequestered by ankerite, dawsonite, and lesser siderite. The CO2 mineral-trapping capacity of the formation can attain 40-50 kg/ in 3 medium for the selected arkose. In contrast, secondary sulfates precipitate at lower pH (pH < 5) within the acidified zone. Most of the injected S02 is transformed and immobilized through alunite precipitation with lesser amounts of anhydrite and minor quantifies of pyrite. The dissolved CO2 increases with time (enhanced solubility trapping). The mineral alteration induced by injection of CO2 with either SO2 or H2S leads to corresponding changes in porosity. Significant increases in porosity occur in the acidified zones where mineral dissolution dominates. With co-injection of SO2, the porosity increases from an initial 0.3 to 0.43 after 100 years. However, within the CO2 mineral-trapping zone, the porosity decreases to about 0.28 for both cases, because of the addition of CO2 mass as secondary carbonates to the rock matrix. Precipitation of sulfates at the acidification front causes porosity to decrease to 0.23. The limited information currently available on the mineralogy of naturally occurring high-pressure CO2 reservoirs is generally consistent with our simulations. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. Taisei Corp, Civil Engn Res Inst, Totsuka Ku, Yokohama, Kanagawa 2450051, Japan. RP Xu, TF (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM tianfu-xu@lbl.gov NR 102 TC 188 Z9 201 U1 4 U2 57 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2541 EI 1878-5999 J9 CHEM GEOL JI Chem. Geol. PD AUG 15 PY 2007 VL 242 IS 3-4 BP 319 EP 346 DI 10.1016/j.chemgeo.2007.03.022 PG 28 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 203EN UT WOS:000248958000003 ER PT J AU Benzerara, K Menguy, N Banerjee, NR Tyliszczak, T Brown, GE Guyot, F AF Benzerara, K. Menguy, N. Banerjee, N. R. Tyliszczak, Tolek Brown, G. E., Jr. Guyot, F. TI Alteration of submarine basaltic glass from the Ontong Java Plateau: A STXM and TEM study SO EARTH AND PLANETARY SCIENCE LETTERS LA English DT Article DE basalt; glass alteration; palagonite; TEM; bacteria ID BIOLOGICALLY MEDIATED DISSOLUTION; LOW-TEMPERATURE ALTERATION; X-RAY MICROSCOPY; OCEANIC-CRUST; HYDROTHERMAL VENTS; OXIDIZING BACTERIA; BIOMASS PRODUCTION; MICROBIAL ACTIVITY; VOLCANIC GLASS; LOIHI SEAMOUNT AB Frequent observations of tubular to vermicular microchannels in altered basalt glass have led to increasing appreciation of a possible significant role of microbes in the low-temperature alteration of seafloor basalt. We have examined such microchannel alteration features at the nanoscale in basalt glass shards from the Ontong Java Plateau using a combination of focused ion bearn milling, transmission electron microscopy and scanning transmission X-ray microscopy. Three types of materials were found in ultrathin cross-sections cut through the microchannels by FIB milling: fresh basalt glass, amorphous Si-rich rims surrounding the microchannels, and palagonite within the microchannels. X-ray absorption spectroscopy at the C K-edge and Fe L-2,L-3-edges showed the presence of organic carbon in association with carbonates within the microchannels and partial oxidation of iron in palagonite compared with basalt g-lass. Although these observations alone cannot discriminate between a biotic or abiotic origin for the microchannels, they provide new information on their mineralogical and chemical composition and thus better constrain tile physical and chemical conditions prevailing during the alteration process. (c) 2007 Published by Elsevier B.V. C1 IMPMC, F-75015 Paris, France. Univ Paris 06, CNRS, Lab Mineral, IPGP,UMR 7590, Paris, France. Univ Paris 07, CNRS, Lab Mineral, IPGP,UMR 7590, Paris, France. Univ Western Ontario, Dept Earth Sci, London, ON N6A 5B7, Canada. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Stanford Univ, Dept Geol & Environm Sci, Surface & Aqueous Geochem Grp, Stanford, CA 94305 USA. RP Benzerara, K (reprint author), IMPMC, Bat 7,140 Rue Lourmel, F-75015 Paris, France. EM karim.benzerara@impmc.jussieu.fr RI MENGUY, Nicolas/F-5607-2012; Benzerara, Karim/J-1532-2016; GUYOT, Francois/C-3824-2016; IMPMC, Geobio/F-8819-2016 OI MENGUY, Nicolas/0000-0003-4613-2490; Benzerara, Karim/0000-0002-0553-0137; GUYOT, Francois/0000-0003-4622-2218; NR 76 TC 62 Z9 63 U1 2 U2 33 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0012-821X J9 EARTH PLANET SC LETT JI Earth Planet. Sci. Lett. PD AUG 15 PY 2007 VL 260 IS 1-2 BP 187 EP 200 DI 10.1016/j.epsl.2007.05.029 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 202DX UT WOS:000248883300015 ER PT J AU Beazley, MJ Martinez, RJ Sobecky, PA Webb, SM Taillefert, M AF Beazley, Melanie J. Martinez, Robert J. Sobecky, Patricia A. Webb, Samuel M. Taillefert, Martial TI Uranium biomineralization as a result of bacterial phosphatase activity: Insights from bacterial isolates from a contaminated subsurface SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID MULTIPLE-SCATTERING; ALKALINE-PHOSPHATASE; BACILLUS-SPHAERICUS; CITROBACTER SP; SOILS; U(VI); REDUCTION; AQUIFER; NITRATE; ACID AB Uranium contamination is an environmental concern at the Department of Energy's Field Research Center in Oak Ridge, Tennessee. In this study, we investigated whether phosphate biomineralization, or the aerobic precipitation of U(VI)-phosphate phases facilitated by the enzymatic activities of microorganisms, offers an alternative to the more extensively studied anaerobic U(VI) bioreduction. Three heterotrophic bacteria isolated from FRC soils were studied for their ability to grow and liberate phosphate in the presence of U(VI) and an organophosphate between pH 4.5 and 7.0. The objectives were to determine whether the strains hydrolyzed sufficient phosphate to precipitate uranium, to determine whether low pH might have an effect on U(VI) precipitation, and to identify the uranium solid phase formed during biomineralization. Two bacterial strains hydrolyzed sufficient organophosphate to precipitate 73-95% total uranium after 120 h of incubation in simulated groundwater. The highest rates of uranium precipitation and phosphatase activity were observed between pH 5.0 and 7.0. EXAFS spectra identified the uranyl phosphate precipitate as an autunite/meta-autunite group mineral. The results of this study indicate that aerobic heterotrophic bacteria within a uranium-contaminated environment that can hydrolyze organophosphate, especially in low pH conditions, may play an important role in the bioremediation of uranium. C1 Georgia Inst Technol, Sch Biol, Atlanta, GA 30332 USA. Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA. Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. RP Taillefert, M (reprint author), Georgia Inst Technol, Sch Biol, Atlanta, GA 30332 USA. EM mtaillef@eas.gatech.edu RI Webb, Samuel/D-4778-2009; OI Webb, Samuel/0000-0003-1188-0464; Martinez, Robert/0000-0003-0836-4776; Beazley, Melanie/0000-0001-9973-7798 NR 44 TC 69 Z9 73 U1 9 U2 56 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 15 PY 2007 VL 41 IS 16 BP 5701 EP 5707 DI 10.1021/es070567g PG 7 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 202EY UT WOS:000248886000024 PM 17874776 ER PT J AU Wu, WM Carley, J Luo, J Ginder-Vogel, MA Cardenas, E Leigh, MB Hwang, CC Kelly, SD Ruan, CM Wu, LY Van Nostrand, J Gentry, T Lowe, K Mehlhorn, T Carroll, S Luo, WS Fields, MW Gu, BH Watson, D Kemner, KM Marsh, T Tiedje, J Zhou, JZ Fendorf, S Kitanidis, PK Jardine, PM Criddle, CS AF Wu, Wei-Min Carley, Jack Luo, Jian Ginder-Vogel, Matthew A. Cardenas, Erick Leigh, Mary Beth Hwang, Chiachi Kelly, Shelly D. Ruan, Chuanmin Wu, Liyou Van Nostrand, Joy Gentry, Terry Lowe, Kenneth Mehlhorn, Tonia Carroll, Sue Luo, Wensui Fields, Matthew W. Gu, Baohua Watson, David Kemner, Kenneth M. Marsh, Terence Tiedje, James Zhou, Jizhong Fendorf, Scott Kitanidis, Peter K. Jardine, Philip M. Criddle, Craig S. TI In situ bioreduction of uranium (VI) to submicromolar levels and reoxidation by dissolved oxygen SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID BACTERIAL COMMUNITY STRUCTURE; HIGHLY CONTAMINATED AQUIFER; SULFATE-REDUCING BACTERIA; FE(III)-REDUCING BACTERIUM; U(VI) REDUCTION; NITRATE; BIOREMEDIATION; EXTRACTION; SEDIMENTS; KINETICS AB Groundwater within Area 3 of the U.S. Department of Energy (DOE) Environmental Remediation Sciences Program (ERSP) Field Research Center at Oak Ridge, TN (ORFRC) contains up to 135 mu M uranium as U(VI). Through a series of experiments at a pilot scale test facility, we explored the lower limits of groundwater U(VI) that can be achieved by in-situ biostimulation and the effects of dissolved oxygen on immobilized uranium. Weekly 2 day additions of ethanol over a 2-year period stimulated growth of denitrifying, Fe(Ill)-reducing, and sulfate-reducing bacteria, and immobilization of uranium as U(N), with dissolved uranium concentrations decreasing to low levels. Following sulfite addition to remove dissolved oxygen, aqueous U(Vl) concentrations fell below the U.S. Environmental Protection Agengy maximum contaminant limit(MCL)for drinking water (<30,mu g L-1 or0.126 mu M). Under anaerobic conditions, these low concentrations were stable, even in the absence of added ethanol. However, when sulfite additions stopped, and dissolved oxygen (4.0-5.5 mg L-1) entered the injection well, spatially variable changes in aqueous U(VI) occurred over a 60 day period, with concentrations increasing rapidly from <0.13 to 2.0 mu M at a multilevel sampling (MLS) well located close to the injection well, but changing little at an MLS well located further away. Resumption of ethanol addition restored reduction of Fe(110, sulfate, and U(V0 within 36 h. After 2 years of ethanol addition, X-ray absorption near-edge structure spectroscopy (XANES) analyses indicated that U(N) comprised 60-80% of the total uranium in sediment samples. Atthe completion ofthe project(day 1260), U concentrations in MLS wells were less than 0.1 mu M. The microbial community at MLS wells with low U(V0 contained bacteria that are known to reduce uranium, including Desulfovibrio spp. and Geobacterspp., in both sedimentand groundwater. The dominant Fe(Ill)-reducing species were Geothrix spp. C1 Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA. Michigan State Univ, Ctr Microbial Ecol, E Lansing, MI 48824 USA. Miami Univ, Dept Microbiol, Oxford, OH 45056 USA. Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA. RP Criddle, CS (reprint author), Stanford Univ, Dept Civil & Environm Engn, Stanford, CA 94305 USA. EM criddle@stanford.edu RI Gu, Baohua/B-9511-2012; ID, MRCAT/G-7586-2011; Watson, David/C-3256-2016; Van Nostrand, Joy/F-1740-2016; OI Gu, Baohua/0000-0002-7299-2956; Watson, David/0000-0002-4972-4136; Van Nostrand, Joy/0000-0001-9548-6450; Cardenas, Erick/0000-0002-5456-013X NR 36 TC 126 Z9 128 U1 10 U2 63 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 15 PY 2007 VL 41 IS 16 BP 5716 EP 5723 DI 10.1021/es062657b PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 202EY UT WOS:000248886000026 PM 17874778 ER PT J AU Le Beyec, J Xu, R Lee, SY Nelson, CM Rizki, A Alcaraz, J Bissell, MJ AF Le Beyec, Jolianne Xu, Ren Lee, Sun-Young Nelson, Celeste M. Rizki, Aylin Alcaraz, Jordi Bissell, Mina J. TI Cell shape regulates global histone acetylation in human mammary epithelial cells SO EXPERIMENTAL CELL RESEARCH LA English DT Article DE cell morphology; chromatin structure; differentiation; histone acetylation ID ANCHORAGE-DEPENDENT FIBROBLASTS; EPIDERMAL GROWTH-FACTOR; BETA-CASEIN EXPRESSION; GENE-EXPRESSION; EXTRACELLULAR-MATRIX; CHROMATIN-STRUCTURE; TRANSCRIPTION FACTORS; PROTEIN-SYNTHESIS; TISSUE PHENOTYPE; NUCLEAR-MATRIX AB Extracellular matrix (ECM) regulates cell morphology and gene expression in vivo; these relationships are maintained in three-dimensional (3D) cultures of mammary epithelial cells. In the presence of laminin-rich ECM (IrECM), mammary epithelial cells round up and undergo global histone deacetylation, a process critical for their functional differentiation. However, it remains unclear whether IrECM-dependent cell rounding and global histone deacetylation are indeed part of a common physical-biochemical pathway. Using 3D cultures as well as nonadhesive and micropatterned substrata, here we showed that the cell 'rounding' caused by IrECM was sufficient to induce deacetylation of histones H3 and H4 in the absence of biochemical cues. Microarray and confocal analysis demonstrated that this deacetylation in 3D culture is associated with a global increase in chromatin condensation and a reduction in gene expression. Whereas cells cultured on plastic substrata formed prominent stress fibers, cells grown in 3D IrECM or on micropatterns lacked these structures. Disruption of the actin cytoskeleton with cytochalasin D phenocopied the IrECM-induced cell rounding and histone deacetylation. These results reveal a novel link between ECM-controlled cell shape and chromatin structure and suggest that this link is mediated by changes in the actin cytoskeleton. (c) 2007 Elsevier Inc. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Univ Paris 06, Ctr Rech Cordeliers, ULMRS872, F-75006 Paris, France. INSERM, UMR S 872, F-75006 Paris, France. Univ Paris 05, UMR S 872, F-75006 Paris, France. RP Bissell, MJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd,MS 977 R225A, Berkeley, CA 94720 USA. EM mjbissell@lbl.gov RI Alcaraz, Jordi/F-5513-2016 OI Alcaraz, Jordi/0000-0001-7898-1599 FU NCI NIH HHS [CA 64786, CA 57621, R01 CA057621, R01 CA064786, R01 CA064786-09, R37 CA064786] NR 72 TC 84 Z9 85 U1 1 U2 7 PU ELSEVIER INC PI SAN DIEGO PA 525 B STREET, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0014-4827 J9 EXP CELL RES JI Exp. Cell Res. PD AUG 15 PY 2007 VL 313 IS 14 BP 3066 EP 3075 DI 10.1016/j.yexcr.2007.04.022 PG 10 WC Oncology; Cell Biology SC Oncology; Cell Biology GA 199EU UT WOS:000248679800010 PM 17524393 ER PT J AU Larentzos, JP Schneider, WF Maginn, EJ AF Larentzos, James P. Schneider, William F. Maginn, Edward J. TI Transferable force field for water adsorption in cation-exchanged titanosilicates SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID HYDROUS CRYSTALLINE SILICOTITANATES; MOLECULAR-DYNAMICS SIMULATION; INORGANIC-ION EXCHANGERS; MONTE-CARLO METHOD; POROUS TITANOSILICATE; SITINAKITE TOPOLOGY; TITANIUM SILICATES; MAS NMR; ZEOLITES; ETS-10 AB A new, transferable classical force field potential for titanosilicate ion-exchange materials is reported. Plane-wave pseudopotential density functional theory (DFT) simulations are used to compute partial charges, where the atomic boundaries are partitioned through the Wigner-Seitz approach. The repulsion-dispersion interactions are modeled with a 12-6 Lennard-Jones potential. The force field is parametrized with the acid-exchanged titanosilicate and transferred to the sodium-, cesium-, and strontium-exchanged titanosilicates and their niobium-substituted counterparts. Grand canonical Monte Carlo simulations are conducted to compute the sorptive properties of water in the acid-exchanged titanosilicate. Excellent agreement of the saturated water loading, positions, and occupancies with experimental neutron diffraction results is observed, while the adsorption energies at low water loading match DFT calculations. In transferring the force field to the sodium-, cesium-, and strontium-exchanged titanosilicates, canonical replica exchange Monte Carlo simulations are used to enhance cation sampling. The Wigner-Seitz force field parametrization effectively predicts the adsorption properties and provides a molecular-scale picture of the origins of titanosilicate selectivity in these materials. Overall, the methodology for translating electronic structural information derived from DFT calculations to classical force field based simulations can easily be extended to alternative crystalline materials such as zeolites and clays. C1 Sandia Natl Labs, Dept Geochem, Albuquerque, NM 87185 USA. Univ Notre Dame, Dept Chem & Biomol Engn, Notre Dame, IN 46556 USA. RP Larentzos, JP (reprint author), Sandia Natl Labs, Dept Geochem, POB 5800 MS 0754, Albuquerque, NM 87185 USA. EM jlarentz@gmail.com NR 64 TC 3 Z9 3 U1 2 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD AUG 15 PY 2007 VL 46 IS 17 BP 5754 EP 5765 DI 10.1021/ie070276g PG 12 WC Engineering, Chemical SC Engineering GA 198WH UT WOS:000248657700030 ER PT J AU Counts, WA Braginsky, MV Battaile, CC Holm, EA AF Counts, William A. Braginsky, Michael V. Battaile, Corbett C. Holm, Elizabeth A. TI Polycrystalline kinematics: An extension of single crystal kinematics that incorporates initial microstructure SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES LA English DT Article DE crystal plasticity; grain boundaries; polycrystalline material; kinematics; geometrically necessary dislocations (GND) ID PLASTICITY; DISLOCATIONS; DEFORMATION; DAMAGE; MODEL AB Single crystal (FFP)-F-e kinematics are widely used as the basis for many crystal plasticity models. Within this kinematic framework, geometrically necessary dislocations (GNDs) initially do not exist and then they evolve as needed in the material. A shortcoming of this kinematic model is that there is no rigorous way to define the initial and evolving GND state in the same manner. By augmenting the single crystal (FFP)-F-e kinematics with a geometric argument, a consistent methodology for determining the initial and evolving GND state has been derived. The augmented kinematics describe GND related microstructural features in the undeformed material like low angle sub-grain boundaries and high angle grain boundaries. Therefore these kinematics are particularly applicable to polycrystalline materials. (c) 2007 Elsevier Ltd. All rights reserved. C1 Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany. Sandia Natl Labs, Computat Mat Sci & Engn Dept, Albuquerque, NM 87185 USA. RP Counts, WA (reprint author), Max Planck Inst Eisenforsch GmbH, Max Plank Str 1, D-40237 Dusseldorf, Germany. EM w.counts@mpie.de RI Holm, Elizabeth/S-2612-2016 OI Holm, Elizabeth/0000-0003-3064-5769 NR 14 TC 2 Z9 2 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0020-7683 J9 INT J SOLIDS STRUCT JI Int. J. Solids Struct. PD AUG 15 PY 2007 VL 44 IS 17 BP 5742 EP 5751 DI 10.1016/j.ijsolstr.2007.01.027 PG 10 WC Mechanics SC Mechanics GA 202CK UT WOS:000248879300020 ER PT J AU Anders, A Oks, EM Yushkov, GY AF Anders, Andre Oks, Efim M. Yushkov, Georgy Yu. TI Production of neutrals and their effects on the ion charge states in cathodic vacuum arc plasmas SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID EXCHANGE COLLISIONS; TIME-DEPENDENCE; DISTRIBUTIONS; PARAMETERS; VAPOR; ATOMS; SPOTS; XE AB Cathodic arc plasmas are considered fully ionized and they contain multiply charged ions, yet gaseous and metal neutrals can be present. It is shown that they can cause a significant reduction of the ion charge states as measured far from the cathode spots. Several cathode materials were used to study the evolution of the mean ion charge state as a function of time after arc ignition. The type of cathode material, arc current amplitude, intentionally increased background gas, additional surfaces placed near the plasma flow, and other factors influence the degree of charge state reduction because all of these factors influence the density of neutrals. In all cases, it was found that the mean ion charge state follows an exponential decay of first order, (Q) over bar (t)=A exp(-t/tau)+(Q) over bar (ss), where A is a parameter describing the importance of the decay, tau is the characteristic decay time, and (Q) over bar (ss) is a steady-state value approached for continuous arc operation. The extrapolated values (Q) over bar (t -> 0) indicate surprisingly high mean charge states as produced at cathode spots and not "skewed" by charge exchange collisions with neutrals. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Russian Acad Sci, Inst High Current Electron, Tomsk 634055, Russia. RP Anders, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM aanders@lbl.gov RI Oks, Efim/A-9409-2014; Anders, Andre/B-8580-2009; Yushkov, Georgy/O-8024-2015 OI Oks, Efim/0000-0002-9323-0686; Anders, Andre/0000-0002-5313-6505; Yushkov, Georgy/0000-0002-7615-6058 NR 37 TC 29 Z9 29 U1 1 U2 7 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 AUG 15 PY 2007 VL 102 IS 4 AR 043303 DI 10.1063/1.2769789 PG 7 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200016 ER PT J AU Brinkman, K Wang, Y Su, D Tagantsev, A Muralt, P Setter, N AF Brinkman, K. Wang, Y. Su, D. Tagantsev, A. Muralt, P. Setter, N. TI The Impact of chemical ordering on the dielectric properties of lead scandium tantalate Pb(Sc1/2Ta1/2)O-3 thin films SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RELAXER FERROELECTRICS; SELF-POLARIZATION; KINETICS; BEHAVIOR; CRYSTALLIZATION; PBMG1/3NB2/3O3; TEMPERATURE; TRANSITION; DISORDER; SYSTEM AB The impact of chemical ordering on the dielectric properties of the thin film relaxor Pb(Sc1/2Ta1/2)O-3 (PST) was investigated. It was found that the dielectric permittivity increased with increased B site order, directly opposite the behavior observed in ceramics. Highly ordered PST thin films on sapphire substrates were found to behave as conventional ferroelectrics with dielectric permittivities near 7000 and well developed polarization hysteresis loops below the phase transition temperature. In contrast, disordered thin films were found to exhibit relaxor behavior with the thin film permittivity reduced by an order of magnitude as compared to ceramic specimens. The direct experimental evidence of highly ordered films and ceramics possessing similar properties under similar processing conditions points to intrinsic differences in the thin film relaxor state as compared to the ceramic relaxor state. It is proposed that the low processing temperatures employed in thin film fabrication do not provide sufficient energy to achieve the same state of "disorder" which is found in ceramic specimens sintered at high temperatures. (c) 2007 American Institute of Physics. C1 Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA. Ecole Polytech Fed Lausanne, Ceram Lab, CH-1015 Lausanne, Switzerland. RP Brinkman, K (reprint author), Westinghouse Savannah River Co, Savannah River Lab, 999-2W Savannah River Site, Aiken, SC 29808 USA. EM kyle.brinkman@srs.gov RI Muralt, Paul/C-5351-2008; Tagantsev, Alexander/E-3707-2010; Su, Dong/A-8233-2013 OI Brinkman, Kyle/0000-0002-2219-1253; Muralt, Paul/0000-0001-6004-1208; Su, Dong/0000-0002-1921-6683 NR 41 TC 14 Z9 14 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 044110 DI 10.1063/1.2770834 PG 7 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200088 ER PT J AU Brito, TB Vermelho, MVD Gouveia, EA de Araujo, MT Guedes, I Loong, CK Boatner, LA AF Brito, Taisa B. Vermelho, M. V. D. Gouveia, E. A. de Araujo, M. T. Guedes, I. Loong, C.-K. Boatner, L. A. TI Optical characterization of Nd3+- and Er3+-doped lead-indium-phosphate glasses SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID JUDD-OFELT ANALYSIS; RARE-EARTH IONS; ER3+ IONS; SPECTROSCOPIC PARAMETERS; ABSORPTION INTENSITIES; BORATE GLASSES; UP-CONVERSION; WAVE-GUIDES; ERBIUM; LAF3 AB In this work, Judd-Ofelt analysis is applied to rare-earth-doped lead-indium-phosphate glasses (RE-PbInPO4, where RE=Er3+ and Nd3+) in order to evaluate their potential as both glass laser systems and amplifier materials. The phenomenological Judd-Ofelt parameters Omega((2)), Omega((4)), and Omega((6)) are determined for both rare-earth ions together with their quality factors and compared with the equivalent parameters for several other host glasses. The spontaneous emission probabilities and the lifetimes of the Nd3+ F-4(3/2) laser transitions are determined and analyzed as a function of the optical quality factor. For Nd3+-PbInPO4, glass fluorescence emission (890, 1058, and 1330 nm) lines are observed. Highly efficient infrared-to-visible frequency up-conversion at 530, 550, and 670 nm as well as an intense infrared fluorescence emission (similar to 1540 nm) is observed in Er3+-doped PbIn(PO4) glasses pumped using 800 nm radiation excitation. C1 Univ Fed Alagoas, Inst Fis, BR-57072970 Maceio, AL, Brazil. Univ Fed Ceara, Dept Fis, Fortaleza, Ceara, Brazil. Argonne Natl Lab, Div Intense Pulsed Neutron Source, Argonne, IL 60439 USA. Oak Ridge Natl Lab, Ctr Radiat Detect Mat & Syst, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA. RP Brito, TB (reprint author), Univ Fed Alagoas, Inst Fis, BR-57072970 Maceio, AL, Brazil. RI GUEDES, ILDE/C-3451-2013; Boatner, Lynn/I-6428-2013; UFC, DF/E-1564-2017; Universidade Federal do Ceara, Physics Department/J-4630-2016; OI Boatner, Lynn/0000-0002-0235-7594; Universidade Federal do Ceara, Physics Department/0000-0002-9247-6780; GUEDES, ILDE/0000-0002-1040-5891 NR 25 TC 19 Z9 19 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 043113 DI 10.1063/1.2756705 PG 7 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200013 ER PT J AU Dobrynin, AN Prozorov, R AF Dobrynin, A. N. Prozorov, R. TI Characteristic temperatures of exchange biased systems SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID FEF2-FE BILAYERS; ANISOTROPY; INTERFACES; BLOCKING; FILMS AB Characteristic temperatures in ferromagnetic-antiferromagnetic exchange biased systems are analyzed. In addition to usual blocking temperature of exchange bias, T-B, and the Neel temperature of an antiferromagnet, T-N, the inducing temperature of exchange bias, T-ind, has been recently proposed. T-ind is the temperature at which the direction of exchange anisotropy is established. We demonstrate that this temperature is, in general, different from T-B and T-N. Measurements of T-ind, in addition to T-B and T-N, provide important information about exchange interactions in ferromagnetic-antiferromagnetic heterostructures. (C) 2007 American Institute of Physics. C1 Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. RP Dobrynin, AN (reprint author), Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. EM alexey@dobrynin.org RI Prozorov, Ruslan/A-2487-2008 OI Prozorov, Ruslan/0000-0002-8088-6096 NR 26 TC 2 Z9 3 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 043902 DI 10.1063/1.2769807 PG 4 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200064 ER PT J AU Fleming, RM Seager, CH Lang, DV Cooper, PJ Bielejec, E Campbell, JM AF Fleming, R. M. Seager, C. H. Lang, D. V. Cooper, P. J. Bielejec, E. Campbell, J. M. TI Effects of clustering on the properties of defects in neutron irradiated silicon SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID LEVEL TRANSIENT SPECTROSCOPY; N-TYPE SILICON; DISORDERED REGIONS; SEMICONDUCTORS; DIVACANCY; DAMAGE; DETECTORS; PROTON; TRAPS; RECOMBINATION AB We have exposed silicon bipolar transistors to fast neutrons and characterized the properties of the resulting defects using capacitance-based spectroscopy of the n-type collector. We have performed low-temperature electron capture measurement of the divacancy (=/-) and vacancy-oxygen (-/0) defects after the samples were annealed from 350-500 K. We show from a simple rate equation analysis that one can define an unambiguous test for cluster-induced reductions of defect level occupation due to slow capture. This allows easy identification of deep level transient spectroscopy (DLTS) levels where the capture is inhibited due to band bending. Our measurements show extremely long, temperature-dependent capture times for the doubly charged state of the divacancy. We have modeled the capture dynamics as a function of annealing using a simple electrostatic band-bending approach coupled with a realistic simulation of the cluster size and shape distribution as estimated from computer simulation of the damage cascades. We find that our simulation of neutron damage combined with electrostatic modeling of the capture data, with only a limited number of adjustable parameters, fits the measured data very well. Our annealing studies indicate, however, that isolated divacancies (those with visible DLTS signals from two acceptor states) comprise only about 30% of the charge in the defect cluster. (C) 2007 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Fleming, RM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM rmflemi@sandia.gov RI Fleming, Robert/B-1248-2008 NR 39 TC 34 Z9 34 U1 1 U2 7 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 043711 DI 10.1063/1.2769783 PG 13 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200062 ER PT J AU Lau, JW Beleggia, M Zhu, Y AF Lau, J. W. Beleggia, M. Zhu, Y. TI Common reversal mechanisms and correlation between transient domain states and field sweep rate in patterned Permalloy structures SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID RECORDING MEDIA; MAGNETIC VISCOSITY; ENERGY AB Complicated domain configurations generated during the magnetization reversal of Permalloy elements patterned in various shapes are the results of a surprisingly few switching mechanisms. By comparing the results from micromagnetic simulations with the experimentally observed switching events imaged by Lorentz microscopy, we found that nucleation and annihilation of vortices and vortex/antivortex pairs, and the propagation of Neel and cross-tie walls are common mechanisms for magnetization reversal in Permalloy elements with dimensions favorable to domain formation. In addition, for a given element, different mechanism combination(s) may transpire, depending on the sweep rate in the externally applied field. This is because energy maxima and minima are generally field dependent and that different field sweep rate alters the time allotted for thermally assisted transition between states. (C) 2007 American Institute of Physics. C1 Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. NIST, Metallurg Div, Gaithersburg, MD 20899 USA. RP Lau, JW (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. EM june.lau@nist.gov RI Lau, June/C-7509-2013; OI Beleggia, Marco/0000-0002-2888-1888 NR 16 TC 7 Z9 7 U1 0 U2 10 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 043906 DI 10.1063/1.2769779 PG 6 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200068 ER PT J AU Mendelev, MI Sordelet, DJ Kramer, MJ AF Mendelev, M. I. Sordelet, D. J. Kramer, M. J. TI Using atomistic computer simulations to analyze x-ray diffraction data from metallic glasses SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID REVERSE MONTE-CARLO; POWDER DIFFRACTION; CREATION; LIQUIDS; MODELS; ALLOYS AB We propose a method of using atomistic computer simulations to obtain partial pair correlation functions from wide angle diffraction experiments with metallic liquids and their glasses. In this method, a model is first created using a semiempirical interatomic potential and then an additional atomic force is added to improve the agreement with experimental diffraction data. To illustrate this approach, the structure of an amorphous Cu64.5Zr35.5 alloy is highlighted, where we present the results for the semiempirical many-body potential and fitting to x-ray diffraction data. While only x-ray diffraction data were used in the present work, the method can be easily adapted to the case when there are also data from neutron diffraction or even in combination. Moreover, this method can be employed in the case of multicomponent systems when the data of several diffraction experiments can be combined. C1 Ames Lab, Ames, IA 50011 USA. RP Mendelev, MI (reprint author), Ames Lab, Ames, IA 50011 USA. EM mendelev@ameslab.gov NR 34 TC 102 Z9 104 U1 1 U2 30 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 043501 DI 10.1063/1.2769157 PG 7 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200019 ER PT J AU Pradhan, SK Deng, ZT Tang, F Wang, C Ren, Y Moeck, P Petkov, V AF Pradhan, S. K. Deng, Z. T. Tang, F. Wang, C. Ren, Y. Moeck, P. Petkov, V. TI Three-dimensional structure of CdX (X=Se,Te) nanocrystals by total x-ray diffraction SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID PAIR DISTRIBUTION FUNCTION; CDSE NANOCRYSTALS; QUANTUM DOTS; LATTICE CONTRACTION; CDTE NANOCRYSTALS; SEMICONDUCTOR NANOCRYSTALS; SURFACE; CORE; NANOPARTICLES; ZINCBLENDE AB The three-dimensional structure of oleic acid-capped CdSe and thiol-capped CdTe nanocrystals used as quantum dots has been determined by total synchrotron radiation x-ray diffraction and atomic pair distribution function analysis. Both CdSe and CdTe are found to exhibit the zinc-blende-type atomic ordering. It is only slightly distorted in CdSe implying the presence of nanosize domains and very heavily distorted in CdTe due to the presence of distinct core-shell regions. The results well demonstrate the great potential of the experimental approach and thus encourage its wider application in quantum dot research. C1 Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA. Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R China. Fudan Univ, Key Lab Mol Engn Polymers, Minist Educ, Shanghai 200433, Peoples R China. Fudan Univ, Dept Macromol Sci, Shanghai 200433, Peoples R China. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Portland State Univ, Dept Phys, Portland, OR 97207 USA. Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48859 USA. RP Petkov, V (reprint author), Univ Burdwan, Dept Phys, Burdwan 713104, W Bengal, India. EM petkov@phy.cmich.edu RI Deng, Zhengtao/F-8581-2010; OI Deng, Zhengtao/0000-0002-8428-8982; Pradhan, Swapan Kumar/0000-0002-0774-872X NR 46 TC 7 Z9 7 U1 3 U2 11 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 044304 DI 10.1063/1.2767615 PG 6 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200101 ER PT J AU Rong, CB Poudyal, N Chaubey, GS Nandwana, V Skomski, R Wu, YQ Kramer, MJ Liu, JP AF Rong, Chuan-Bing Poudyal, Narayan Chaubey, Girija S. Nandwana, Vikas Skomski, R. Wu, Y. Q. Kramer, M. J. Liu, J. Ping TI Structural phase transition and ferromagnetism in monodisperse 3 nm FePt particles SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID L1(0)-FEPT NANOPARTICLES; FILMS; DEPENDENCE; MAGNETS AB FePt nanoparticles with a size of 3 nm and thermally stable room-temperature ferromagnetism are investigated. The monodisperse nanoparticles were prepared by chemical synthesis and a salt-matrix annealing technique. Structural and magnetic characterizations confirmed the phase transition from the disordered face-centered cubic structure to the L1(0) structure with the chemical ordering parameter of 0.62 +/- 0.05. Analysis in blocking temperature and fitting of temperature dependence of switching field reveals that the transformed 3 nm nanoparticles have a magnetic anisotropy constant of (2.8 +/- 0.2)x10(6) J/m(3), smaller than those for the bigger particles and the fully ordered L1(0) bulk phase. (C) 2007 American Institute of Physics. C1 Univ Texas, Dept Phys, Arlington, TX 76019 USA. Univ Nebraska, Dept Phys & Astron, Ctr Mat Res & Anal, Lincoln, NE 68588 USA. Iowa State Univ, Ames Lab, Dept Mat Sci & Engn, Ames, IA 50011 USA. Univ Texas, Dept Phys, Arlington, TX 76019 USA. RP Rong, CB (reprint author), Univ Texas, Dept Phys, POB 19059, Arlington, TX 76019 USA. EM pliu@uta.edu RI Rong, Chuanbing/C-6703-2008 NR 25 TC 24 Z9 24 U1 0 U2 11 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 043913 DI 10.1063/1.2773694 PG 4 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200075 ER PT J AU Wen, SB Mao, XL Greif, R Russo, RE AF Wen, Sy-Bor Mao, Xianglei Greif, Ralph Russo, Richard E. TI Analysis of laser ablation: Contribution of ionization energy to the plasma and shock wave properties SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID EXPANSION; METALS; MODEL; PLUME; GAS AB By fitting simulation results with experimentally measured trajectories of the shock wave and the vapor/background gas contact surface, we found that inclusion of ionization energy in the analysis leads to a change in the evolution of the pressure, mass density, electron number density, and temperature of the vapor plume. The contribution of ionization energy to both the plasma and shock wave has been neglected in most studies of laser ablation. Compared to previous simulations, the densities, pressures, and temperatures are lower shortly after the laser pulse (< 5 ns), but become larger (by a factor of 2) as the time after the laser pulse increases (> 50 ns). The predicted laser energy conversion ratio also showed about a 20% increase (from 35% to 45%) when the ionization energy is considered. The changes in the evolution of the physical quantities result from the retention of the ionization energy in the vapor plume, which is then gradually transformed to kinetic and thermal energies. When ionization energy is included in the simulation, the vapor plume attains higher expansion speeds and temperatures for a longer time after the laser pulse. The better determination of the temperature history of the vapor plume not only improves the understanding of the expansion process of the laser induced vapor plume but also is important for chemical analysis. The accurate temperature history provides supplementary information which enhances the accuracy of chemical analysis based on spectral emission measurements (e.g., laser induced breakdown spectroscopy). C1 Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA. RP Russo, RE (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM rerusso@lbl.gov NR 20 TC 8 Z9 8 U1 0 U2 9 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 2007 VL 102 IS 4 AR 043103 DI 10.1063/1.2761827 PG 10 WC Physics, Applied SC Physics GA 206AL UT WOS:000249156200003 ER PT J AU Bourg, IC Sposito, G Bourg, ACM AF Bourg, Ian C. Sposito, Garrison Bourg, Alain C. M. TI Modeling the acid-base surface chemistry of montmorillonite SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Article DE montmorillonite; smectite; acid-base properties; potentiometric titration; surface complexation model ID ELECTRICAL DOUBLE-LAYER; CLAY MINERAL PARTICLE; DIFFUSE DOUBLE-LAYER; NA-MONTMORILLONITE; POTENTIOMETRIC TITRATIONS; MECHANISTIC DESCRIPTION; ZN SORPTION; AB-INITIO; ADSORPTION; CHARGE AB Proton uptake on montmorillonite edge surfaces can control pore water pH, solute adsorption, dissolution kinetics and clay colloid behavior in engineered clay barriers and natural weathering environments. Knowledge of proton uptake reactions, however, is currently limited by strong discrepancies between reported montmorillonite titration data sets and by conflicting estimates of edge structure, reactivity and electrostatics. In the present study, we show that the apparent discrepancy between titration data sets results in large part from the widespread use of an erroneous assumption of zero specific net proton surface charge at the onset: of titration. Using a novel simulation scheme involving a surface chemistry model to simulate both pretreatment and titration, we find that montmorillonite edge surface chemistry models that account for the "spillover" of electrostatic potential from basal onto edge surfaces and for the stabilization of deprotonated Al-Si bridging sites through bond-length relaxation at the edge surface can reproduce key features of the best available experimental titration data (the influence of pretreatment conditions on experimental results, the absence of a point of zero salt effect, buffer capacity in the acidic pH range). However, no combination of current models of edge surface structure, reactivity and electrostatics can quantitatively predict, without fitted parameters, the experimental titration data over the entire range of pH (4.5 to 9) and ionic strength (0.001 to 0.5 mol dm(-3)) covered by available data. (c) 2007 Elsevier Inc. All rights reserved. C1 Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA. Univ Pau & Pays Adour, Pau, France. Lawrence Berkeley Natl Lab, Dept Geochem, Div Earth Sci, Berkeley, CA USA. ANDRA, Chatenay Malabry, France. RP Bourg, IC (reprint author), Univ Calif Berkeley, Dept Civil & Environm Engn, 137 Mulford Hall,3114, Berkeley, CA 94720 USA. EM ibourg@nature.berkeley.edu RI Bourg, Ian/A-6405-2013; OI Bourg, Ian/0000-0002-5265-7229 NR 58 TC 68 Z9 69 U1 8 U2 57 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD AUG 15 PY 2007 VL 312 IS 2 BP 297 EP 310 DI 10.1016/j.jcis.2007.03.062 PG 14 WC Chemistry, Physical SC Chemistry GA 187HM UT WOS:000247838300015 PM 17482201 ER PT J AU Reimus, PW Callahan, TJ Ware, SD Haga, MJ Counce, DA AF Reimus, Paul W. Callahan, Timothy J. Ware, S. Doug Haga, Marc J. Counce, Dale A. TI Matrix diffusion coefficients in volcanic rocks at the Nevada test site: Influence of matrix porosity, matrix permeability, and fracture coating minerals SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE matrix diffusion; tracers; matrix tortuosity; matrix porosity; matrix permeability ID SOLUTE TRANSPORT; TRACERS; MEDIA; MODEL; TUFF AB Diffusion cell experiments were conducted to measure nonsorbing solute matrix diffusion coefficients in forty-seven different volcanic rock matrix samples from eight different locations (with multiple depth intervals represented at several locations) at the Nevada Test Site. The solutes used in the experiments included bromide, iodide, pentafluorobenzoate (PFBA), and tritiated water ((HHO)-H-3). The porosity and saturated permeability of most of the diffusion cell samples were measured to evaluate the correlation of these two variables with tracer matrix diffusion coefficients divided by the free-water diffusion coefficient (D-m/D*). To investigate the influence of fracture coating minerals on matrix diffusion, ten of the diffusion cells represented paired samples from the same depth interval in which one sample contained a fracture surface with mineral coatings and the other sample consisted of only pure matrix. The log of (D-m/D*) was found to be positively correlated with both the matrix porosity and the log of matrix permeability. A multiple linear regression analysis indicated that both parameters contributed significantly to the regression at the 95% confidence level. However, the log of the matrix diffusion coefficient was more highly-correlated with the log of matrix permeability than with matrix porosity, which suggests that matrix diffusion coefficients, like matrix penneabilities, have a greater dependence on the interconnectedness of matrix porosity than on the matrix porosity itself. The regression equation for the volcanic rocks was found to provide satisfactory predictions of log(D-m/D*) for other types of rocks with similar ranges of matrix porosity and permeability as the volcanic rocks, but it did a poorer job predicting log(D-m/D*) for rocks with lower porosities and/or permeabilities. The presence of mineral coatings on fracture walls did not appear to have a significant effect on matrix diffusion in the ten paired diffusion cell experiments. (c) 2007 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. Coll Charleston, Dept Geol & Environm Geosci, Charleston, SC 29424 USA. RP Reimus, PW (reprint author), Los Alamos Natl Lab, Div Earth & Environm Sci, Los Alamos, NM 87545 USA. EM preimus@lanl.gov NR 21 TC 9 Z9 10 U1 1 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD AUG 15 PY 2007 VL 93 IS 1-4 BP 85 EP 95 DI 10.1016/j.jconhyd.2007.01.017 PG 11 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 204OO UT WOS:000249054100007 PM 17350718 ER PT J AU Zhou, QL Liu, HH Molz, FJ Zhang, YQ Bodvarsson, GS AF Zhou, Quanlin Liu, Hui-Hai Molz, Fred J. Zhang, Yingqi Bodvarsson, Gudmundur S. TI Field-scale effective matrix diffusion coefficient for fractured rock: Results from literature survey SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Review DE scale dependence; matrix diffusion; fractured rock; tracer test; solute transport; heterogeneity ID CONVERGENT RADIAL DISPERSION; SOLUTE TRANSPORT MODEL; APERTURE CHANNEL MODEL; DUAL-POROSITY MEDIA; RATE MASS-TRANSFER; SITU TRACER TESTS; EL BERROCAL SITE; SINGLE FRACTURE; CONTAMINANT TRANSPORT; GROUNDWATER-FLOW AB Matrix diffusion is an important mechanism for solute transport in fractured rock. We recently conducted a literature survey on the effective matrix diffusion coefficient, De,, a key parameter for describing matrix diffusion processes at the field scale. Forty field tracer tests at 15 fractured geologic sites were surveyed and selected for the study, based on data availability and quality. Field-scale D-m(e) values were calculated, either directly using data reported in the literature, or by reanalyzing the corresponding field tracer tests. The reanalysis was conducted for the selected tracer tests using analytic or semi-analytic solutions for tracer transport in linear, radial, or interwell flow fields. Surveyed data show that the scale factor of the effective matrix diffusion coefficient (defined as the ratio of D-m(e) to the lab-scale matrix diffusion coefficient, D-m, of the same tracer) is generally larger than one, indicating that the effective matrix diffusion coefficient in the field is comparatively larger than the matrix diffusion coefficient at the rock-core scale. This larger value can be attributed to the many mass-transfer processes at different scales in naturally heterogeneous, fractured rock systems. Furthermore, we observed a moderate, on average trend toward systematic increase in the scale factor with observation scale. This trend suggests that the effective matrix diffusion coefficient is likely to be statistically scale-dependent. The scale-factor value ranges from 0.5 to 884 for observation scales from 5 to 2000 in. At a given scale, the scale factor varies by two orders of magnitude, reflecting the influence of differing degrees of fractured rock heterogeneity at different geologic sites. In addition, the surveyed data indicate that field-scale longitudinal dispersivity generally increases with observation scale, which is consistent with previous studies. The scale-dependent field-scale matrix diffusion coefficient (and dispersivity) may have significant implications for assessing long-term, large-scale radionuclide and contaminant transport events in fractured rock, both for nuclear waste disposal and contaminant remediation. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. Clemson Univ, Dept Environm Engn & Sci, Clemson, SC 29634 USA. RP Zhou, QL (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. EM QZhou@lbl.gov RI Zhou, Quanlin/B-2455-2009; Zhang, Yingqi/D-1203-2015 OI Zhou, Quanlin/0000-0001-6780-7536; NR 132 TC 46 Z9 47 U1 11 U2 51 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD AUG 15 PY 2007 VL 93 IS 1-4 BP 161 EP 187 DI 10.1016/j.jconhyd.2007.02.002 PG 27 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 204OO UT WOS:000249054100013 PM 17397963 ER PT J AU Yabusaki, SB Fang, Y Long, PE Resch, CT Peacock, AD Komlos, J Jaffe, PR Morrison, SJ Dayvault, RD White, DC Anderson, RT AF Yabusaki, Steven B. Fang, Yilin Long, Philip E. Resch, Charles T. Peacock, Aaron D. Komlos, John Jaffe, Peter R. Morrison, Stan J. Dayvault, Richard D. White, David C. Anderson, Robert T. TI Uranium removal from groundwater via in situ biostimulation: Field-scale modeling of transport and biological processes SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE bioremediation; biostimulation; field experiment; reactive transport; uranium; iron; sulfate ID DISSIMILATORY METAL REDUCTION; MICROBIAL REDUCTION; CONTAMINATED AQUIFER; REDUCING BACTERIA; U(VI); BIOREMEDIATION; SEDIMENTS; FE(III); OXIDES; IRON AB During 2002 and 2003, bioremediation experiments in the unconfined aquifer of the Old Rifle UMTRA field site in western Colorado provided evidence for the immobilization of hexavalent uranium in groundwater by iron-reducing Geobacter sp. stimulated by acetate amendment. As the bioavailable Fe(III) terminal electron acceptor was depleted in the zone just downgradient of the acetate injection gallery, sulfate-reducing organisms came to dominate the microbial community. In the present study, we use multicomponent reactive transport modeling to analyze data from the 2002 field experiment to identify the dominant transport and biological processes controlling uranium mobility during biostimulation, and determine field-scale parameters for these modeled processes. The coupled process simulation approach was able to establish a quantitative characterization of the principal flow, transport, and reaction processes based on the 2002 field experiment, that could be applied without modification to describe the 2003 field experiment. Insights gained from this analysis include field-scale estimates of the bioavailable Fe(III) mineral threshold for the onset of sulfate reduction, and rates for the Fe(III), U(VI), and sulfate terminal electron accepting processes. (c) 2007 Elsevier B.V. All rights reserved. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Univ Massachusetts, Amherst, MA 01003 USA. Univ Tennessee, Knoxville, TN 37996 USA. Princeton Univ, Princeton, NJ 08544 USA. RP Yabusaki, SB (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM yabusaki@pnl.gov RI Long, Philip/F-5728-2013; Fang, Yilin/J-5137-2015 OI Long, Philip/0000-0003-4152-5682; NR 35 TC 95 Z9 97 U1 5 U2 46 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD AUG 15 PY 2007 VL 93 IS 1-4 BP 216 EP 235 DI 10.1016/j.jconhyd.2007.02.005 PG 20 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 204OO UT WOS:000249054100016 PM 17442451 ER PT J AU Um, W Serne, RJ Brown, CF Last, GV AF Um, Wooyong Serne, R. Jeffrey Brown, Christopher F. Last, George V. TI U(VI) adsorption on aquifer sediments at the Hanford Site SO JOURNAL OF CONTAMINANT HYDROLOGY LA English DT Article DE uranium; adsorption; desorption; hanford site; distribution coefficient (K-d) ID URANIUM(VI) ADSORPTION; IRON; CALCITE; LUMINESCENCE; SPECIATION; SORPTION; MODEL; XAFS AB Aquifer sediments collected via split-spoon sampling in two new groundwater wells in the 200-UP-1 operable unit at the Hanford Site were characterized and showed typical Ringold Unit E Formation properties dominated by gravel and sand. High iron-oxide content in Fe oxide/clay coatings caused the highest U(VI) adsorption as quantified by batch Kd values, indicating iron oxides are the key solid adsorbent in the 200-UP-1 sediments that affect U(VI) fate and mobility. Even though U(VI) adsorption on the gravel-sized fraction of the sediments is considered to be negligible, careful characterization should be conducted to determine U(VI) adsorption on gravel, because of presence of Fe oxides coatings and diffusion-controlled adsorption into the gravel particles' interior surfaces. A linear adsorption isotherm was observed up to 10(-6) M (238 mu g/L) of total U(VI) concentration in batch U(VI) adsorption tests with varying total U(VI) concentrations in spiked groundwater. U(VI) adsorption decreased with increasing concentrations of dissolved carbonate, because strong anionic aqueous uranium-carbonate complexes formed at high pH and high alkalinity conditions. Noticeable uranium desorption hysteresis was observed in a flow-through column experiment, suggesting that desorption Kd values for aged uranium-contaminated sediments at the Hanford Site can be larger than adsorption Kd values determined in short-term laboratory experiments and slow uranium release from contaminated sediments into the groundwater is expected. Published by Elsevier B.V. C1 Pacific NW Natl Lab, Richland, WA 99354 USA. RP Um, W (reprint author), Pacific NW Natl Lab, POB 999,MS P7-22, Richland, WA 99354 USA. EM wooyong.um@pnl.gov NR 29 TC 14 Z9 15 U1 4 U2 22 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-7722 J9 J CONTAM HYDROL JI J. Contam. Hydrol. PD AUG 15 PY 2007 VL 93 IS 1-4 BP 255 EP 269 DI 10.1016/j.jconhyd.2007.03.002 PG 15 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA 204OO UT WOS:000249054100018 PM 17499879 ER PT J AU Ding, Y He, JQ AF Ding, Yong He, Jiaqing TI Domain structures and superdislocations of La0.7Ca0.3MnO3 thin films grown on SrTiO3 substrates SO JOURNAL OF CRYSTAL GROWTH LA English DT Article DE transmission electron microscopy; defects; thin films; La0.7Ca0.3MnO3 ID TRANSMISSION ELECTRON-MICROSCOPY; 3-DIMENSIONAL STRAIN STATES; PHASE-TRANSITION; ATOMIC-STRUCTURE; MICROSTRUCTURE; MAGNETORESISTANCE; DISLOCATIONS; BOUNDARIES; LA0.73CA0.27MNO3; LA2/3CA1/3MNO3 AB The domain structures and dislocations in epitaxial thin films of La0.7Ca0.3MnO3 grown on SrTiO3 substrates by pulsed laser deposition were investigated using transmission electron microscopy. It revealed that the films contained the 1/2[10 0](0) and 1/2[1 0 (1) over bar](0) types 1/2[0 1 0](0), 1/2[1 1 1](0), of antiphase partial threading dislocations, the 90 degrees- and 120 degrees-types of twin-domain boundaries, and two types 2 2 boundaries, which are often observed in bulk materials. In addition, two types of superdislocations were detected; one consisted of two 1/2[1 1 1](0) dislocations and a 1/2[1 1 1](0) antiphase boundary, and the other was composed of two 1/2[0 10]0 dislocations and a 1/2[0 10]0 antiphase boundary. These superdislocations, domain boundaries, and their relationships were extensively explored. (c) 2007 Elsevier B.V. All rights reserved. C1 Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany. RP He, JQ (reprint author), Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. EM jhe@bnl.gov RI He, Jiaqing/A-2245-2010 NR 29 TC 0 Z9 1 U1 1 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD AUG 15 PY 2007 VL 306 IS 2 BP 437 EP 443 DI 10.1016/j.jcrysgro.2007.05.033 PG 7 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA 212RI UT WOS:000249614100033 ER PT J AU Kimmer, CJ Jones, RE AF Kimmer, C. J. Jones, R. E. TI Continuum constitutive models from analytical free energies SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID CAUCHY-BORN RULE; CRYSTALLINE SOLIDS; EQUILIBRIUM-CONFIGURATIONS; DEFECTIVE CRYSTALS; LATTICE-DYNAMICS; BRIDGING SCALE; STABILITY; SIMULATIONS; MINIMIZATION AB We present a critical investigation of the validity of the harmonic approximation for developing constitutive models for multiscale simulations. We examine models using the Cauchy-Born hypothesis within the quasiharmonic, local harmonic, and modified local harmonic approximations in order to characterize the strain and temperature dependence of the Cauchy stress for uniaxial, equibiaxial, and equitriaxial deformations. We compare these predictions with molecular dynamics simulations to evaluate the suitability of each harmonic model over a wide range of strains and temperatures. The various harmonic approximations are found to be very robust over a large temperature range. All the approximations make very similar predictions at small strains and temperatures. At larger strains and temperatures, the quasiharmonic model is the most accurate but also the most computationally expensive. The modified local harmonic model is seen to provide an accurate alternative to the full quasiharmonic model over a wide range of strains while being much less computationally expensive. The local harmonic model is similar in absolute accuracy to the modified local harmonic model, but the modified harmonic model is seen to more accurately predict the elastic moduli. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Kimmer, CJ (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. EM cjkimme@sandia.gov NR 44 TC 5 Z9 5 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 EI 1361-648X J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 15 PY 2007 VL 19 IS 32 AR 326207 DI 10.1088/0953-8984/19/32/326207 PG 16 WC Physics, Condensed Matter SC Physics GA 192FI UT WOS:000248185800014 ER PT J AU Lopez, JG Vayner, G Lourderaj, U Addepalli, SV Kato, S Dejong, WA Windus, TL Hase, WL AF Lopez, Jose G. Vayner, Grigoriy Lourderaj, Upakarasamy Addepalli, Srirangam V. Kato, Shuji deJong, Wibe A. Windus, Theresa L. Hase, William L. TI A direct dynamics trajectory study of F-+CH(3)OOHreactive collisions reveals a major Non-IRC reaction path SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID SN2 NUCLEOPHILIC-SUBSTITUTION; POTENTIAL-ENERGY SURFACE; GAS-PHASE; UNIMOLECULAR DYNAMICS; CLASSICAL MECHANICS; SIMULATIONS; DECOMPOSITION; CYCLOPROPANE; FORMALDEHYDE; KINETICS AB A direct dynamics simulation at the B3LYP/6-311+G(d,p) level of theory was used to study the F- + CH3OOH reaction dynamics. The simulations are in excellent agreement with a previous experimental study (J. Am. Chem. Soc. 2002, 124, 3196). Two product channels, HF + CH2O + OH- and HF + CH3OO-, are observed. The former dominates and occurs via an E(CO)2 mechanism in which F- attacks the CH3- group, abstracting a proton. Concertedly, a carbon-oxygen double bond is formed and OH- is eliminated. Somewhat surprisingly this is not the reaction path, predicted by the intrinsic reaction coordinate (IRC), which leads to a deep potential energy minimum for the CH2(OH)(2)center dot center dot center dot F- complex followed by dissociation to HF + CH2(OH)O-. None of the direct dynamics trajectories followed this path, which has an energy release of -63 kcal/mol and is considerably more exothermic than the E(CO)2 path whose energy release is -27 kcal/mol. Other product channels not observed, and which have a lower energy than that for the E(CO)2 path, are F- + CO + H-2 + H2O (-43 kcal/mol), F- + CH2O + H2O (-51 kcal/mol), and F- + CH2(OH)(2) (-60 kcal/mol). Formation of the CH3OOH center dot center dot center dot F- complex, with randomization of its internal energy, is important, and this complex dissociates via the E(CO)2 mechanism. Trajectories which form HF + CH3OO- are nonstatistical events and, for the 4 ps direct dynamics simulation, are not mediated by the CH3OOH center dot center dot center dot F- complex. Dissociation of this complex to form HF + CH3OO- may occur on longer time scales. C1 Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA. Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA. Pacific NW Natl Lab, Environm Mol Sci, Richland, WA 99352 USA. RP Hase, WL (reprint author), Texas Tech Univ, Dept Chem & Biochem, Lubbock, TX 79409 USA. EM bill.hase@ttu.edu RI DE JONG, WIBE/A-5443-2008 OI DE JONG, WIBE/0000-0002-7114-8315 NR 52 TC 82 Z9 82 U1 1 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 15 PY 2007 VL 129 IS 32 BP 9976 EP 9985 DI 10.1021/ja0717360 PG 10 WC Chemistry, Multidisciplinary SC Chemistry GA 199PU UT WOS:000248708500028 PM 17658801 ER PT J AU Schneider, J Mishra, RS Bieler, TR Zhu, YTT Morsi, KB Acoff, VL Taleff, EM Valiev, R Kostorz, G AF Schneider, Judy Mishra, Rajiv S. Bieler, Thomas R. Zhu, Yuntian T. Morsi, Khaled B. Acoff, Viola L. Taleff, Eric M. Valiev, Ruslan Kostorz, Gernot TI Processing and Mechanical Response of Engineering Materials Symposium held in honor of Professor Amiya Mukherjee at the TMS Annual Meeting, San Antonio, Texas, March 12-16, 2006. Preface SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Editorial Material C1 Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA. Univ Missouri, Rolla, MO 65401 USA. Michigan State Univ, E Lansing, MI 48824 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. San Diego State Univ, San Diego, CA 92182 USA. Univ Alabama, Tuscaloosa, AL 35487 USA. Inst Phys & Adv Mat, Ufa, Russia. RP Schneider, J (reprint author), Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA. EM schneider@me.msstate.edu RI Mishra, Rajiv/A-7985-2009; kostorz, gernot/B-6489-2009 OI Mishra, Rajiv/0000-0002-1699-0614; NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 SI SI BP 1 EP 1 DI 10.1016/j.msea.2006.12.058 PG 1 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700001 ER PT J AU Zhao, YH Zhu, YT Liao, XZ Horita, ZJ Langdon, TG AF Zhao, Y. H. Zhu, Y. T. Liao, X. Z. Horita, Zenji Langdon, Terence G. TI Influence of stacking fault energy on the minimum grain size achieved in severe plastic deformation SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Symposium on Processing and Mechanical Response of Engineering Materials held at the 2006 TMS Annual Meeting CY MAR 12-16, 2006 CL San Antonio, TX SP TMS DE copper alloys; grain size distributions; milling; severe plastic deformation; stacking fault energy ID HIGH-PRESSURE TORSION; MOLECULAR-DYNAMICS SIMULATION; MICROSTRUCTURAL EVOLUTION; ALUMINUM-ALLOY; REFINEMENT; SUPERPLASTICITY; MICROHARDNESS; NICKEL; MECHANISM; BEHAVIOR AB Samples of pure Cu and a Cu-10% Zn alloy were processed by high-pressure torsion and by high-pressure torsion followed by cold-rolling to a reduction of similar to 75%. The grain sizes in these two conditions were measured by transmission electron microscopy and by X-ray diffraction. The experimental results show the average grain size and the width of the grain size distribution are both smaller in the Cu-1 0% Zn alloy by comparison with pure Cu. This difference is due to the lower stacking fault energy of the Cu-10% Zn alloy. An analysis shows all of the experimental results are consistent with a theoretical model predicting the minimum grain size produced by milling. (c) 2006 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. Univ Chicago, James Franck Inst, Chicago, IL 60637 USA. Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8190395, Japan. Univ So Calif, Dept Aerosp & Mech Engn & Mat Sci, Los Angeles, CA 90089 USA. RP Langdon, TG (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, MS G755, Los Alamos, NM 87545 USA. EM langdon@usc.edu RI Langdon, Terence/B-1487-2008; Zhu, Yuntian/B-3021-2008; Zhao, Yonghao/A-8521-2009; Liao, Xiaozhou/B-3168-2009; Lujan Center, LANL/G-4896-2012; U-ID, Kyushu/C-5291-2016 OI Zhu, Yuntian/0000-0002-5961-7422; Liao, Xiaozhou/0000-0001-8565-1758; NR 34 TC 76 Z9 76 U1 4 U2 26 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 SI SI BP 22 EP 26 DI 10.1016/j.msea.2006.08.119 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700005 ER PT J AU Lesuer, DR Syn, CK Sherby, OD AF Lesuer, D. R. Syn, C. K. Sherby, O. D. TI Nano-subgrain strengthening in ball-milled iron SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Symposium on Processing and Mechanical Response of Engineering Materials held at the 2006 TMS Annual Meeting CY MAR 12-16, 2006 CL San Antonio, TX SP TMS DE strength; subgrains; iron; ball milling ID PLASTIC-DEFORMATION; ANNEALING BEHAVIOR; YIELD-POINT; SHEAR BANDS; STEEL; NANOCRYSTALLINE; MICROSTRUCTURE; PARTICLES; MECHANISM; OXIDES AB The strength and deformation behavior of ball-milled, iron-base materials containing nano-scale subgrains have been evaluated. As reported by several authors, nano-subgrains form during the early stages of ball milling as a result of severe plastic deformation inherent in the ball milling process. The strength for these nano-scale subgrains are compared with the strength of larger-scale subgrains in iron and iron-base alloys produced by traditional mechanical working. The data covers over two orders of magnitude in subgrain size (from 30 nm to 6 mu m) and shows a continuous pattern of behavior. For all materials studied, the strength varied as lambda(-1), where lambda is the subgrain size. Strengthening from subgrains was found to breakdown at a much smaller subgrain size than strengthening from grains. In addition, the ball-milled materials showed significant strengthening contributions from nano-scale oxide particles. Shear bands are developed during compression testing of ball-milled materials containing ultra-fine subgrains. A model for shear band development in nano-scale subgrains during deformation has also been developed. The model predicts a strain state of uniaxial compression in the shear band with a strain of -1.24. Subgrains are shown to offer the opportunity for high strength and good work hardening with the absence of yield point behavior. (c) 2006 Elsevier B.V. All rights reserved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Stanford Univ, Stanford, CA 94305 USA. RP Lesuer, DR (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM lesuer1@llnl.gov NR 22 TC 9 Z9 9 U1 2 U2 9 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 SI SI BP 54 EP 60 DI 10.1016/j.msea.2006.07.161 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700010 ER PT J AU Jiang, DT Hulbert, DM Kuntz, JD Anselmi-Tamburini, U Mukherjee, AK AF Jiang, Dongtao Hulbert, Dustin M. Kuntz, Joshua D. Anselmi-Tamburini, Umberto Mukherjee, Amiya K. TI Spark plasma sintering: A high strain rate low temperature forming tool for ceramics SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Symposium on Processing and Mechanical Response of Engineering Materials held at the 2006 TMS Annual Meeting CY MAR 12-16, 2006 CL San Antonio, TX SP TMS DE spark plasma sintering; forming; ceramics; superplasticity ID MECHANICAL-PROPERTIES; MAGNETIC-PROPERTIES; POWDERS; COMPOSITES; GLASS; MICROSTRUCTURE; CONSOLIDATION; FABRICATION; TIO2; SPS AB Spark plasma sintering (SPS) technique is being widely used to produce nanocrystalline materials by virtue of rapid sintering at relatively lower temperatures. In this investigation, fully dense Al2O3-ZrO2-MgAl2O4 composite was superplastically formed into a complex shape using SPS equipment with a strain rate of approximately 10(-2) s(-1) at temperatures as low as 1150 degrees C which is impossible to obtain by using conventional forming methods. Furthermore, a powder compact can be directly shaped into a complex shape, combining sintering and forming into one step. The product is fully dense and free of surface cracks. These results indicate that SPS can be a very competitive forming tool for ceramics as well other hard materials. (c) 2006 Elsevier B.V. All rights reserved. C1 Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Jiang, DT (reprint author), Univ Calif Davis, Dept Chem Engn & Mat Sci, 1 Shields Ave, Davis, CA 95616 USA. EM dtjiang@ucdavis.edu NR 21 TC 31 Z9 32 U1 0 U2 18 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 SI SI BP 89 EP 93 DI 10.1016/j.msea.2006.07.163 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700015 ER PT J AU Sturm, D Heilmaier, M Schneibel, JH Jehanno, P Skrotzki, B Saage, H AF Sturm, D. Heilmaier, M. Schneibel, J. H. Jehanno, P. Skrotzki, B. Saage, H. TI The influence of silicon on the strength and fracture toughness of molybdenum SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Symposium on Processing and Mechanical Response of Engineering Materials held at the 2006 TMS Annual Meeting CY MAR 12-16, 2006 CL San Antonio, TX SP TMS DE molybdenum; solid solution strengthening; solid solution softening; hall-petch relationship ID SI-B ALLOYS; NICKEL-BASE SUPERALLOYS; SINGLE-CRYSTALS; BCC-METALS; MECHANICAL-PROPERTIES; DEFORMATION; TEMPERATURE; BEHAVIOR; GLIDE; DEPENDENCE AB Mo-Si alloys containing up to 1 wt.% Si were fabricated by powder-metallurgical processing and their lattice parameters, elastic constants, densities, grain sizes, strengths, ductilities, and fracture toughness values were measured. The yield strength was insensitive to the grain size, i.e., a Hall-Petch relationship was not observed. Generally, Si additions caused pronounced solid solution strengthening. However, for small Si concentrations (<= 0.1 wt.%) solid solution softening was observed at room temperature and below. With increasing Si concentration, the room temperature ductility and fracture toughness dropped precipitously. This is attributed to the increase in strength and a transition from transgranular to intergranular fracture. (c) 2006 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA. Otto Von Guericke Univ, Inst Werkstoff & Fugetech, D-39016 Magdeburg, Germany. Plansee SE, Technologiezentrum, A-6600 Reutte, Austria. Bundesanstaldt Mat Forsch, D-12205 Berlin, Germany. RP Schneibel, JH (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, POB 2008, Oak Ridge, TN 37831 USA. EM schneibeljh@ornl.gov RI Skrotzki, Birgit/I-7661-2015 OI Skrotzki, Birgit/0000-0003-0727-5499 NR 35 TC 50 Z9 53 U1 2 U2 13 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 SI SI BP 107 EP 114 DI 10.1016/j.msea.2006.07.153 PG 8 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700018 ER PT J AU Kaschner, GC Tome, CN McCabe, RJ Misra, A Vogel, SC Brown, DW AF Kaschner, G. C. Tome, C. N. McCabe, R. J. Misra, A. Vogel, S. C. Brown, D. W. TI Exploring the dislocation/twin interactions in zirconium SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Symposium on Processing and Mechanical Response of Engineering Materials held at the 2006 TMS Annual Meeting CY MAR 12-16, 2006 CL San Antonio, TX SP TMS DE zirconium; deformation twinning; dislocation recovery ID FINITE-ELEMENT ANALYSIS; MECHANICAL RESPONSE; TEXTURE ANALYSIS; DEFORMATION; DIFFRACTION; SLIP AB This paper explores the 'barrier' effect that tensile and compressive twins exert upon propagation of dislocations and other twins in zirconium (Zr). We do so by pre-deforming textured Zr at liquid nitrogen to selectively induce either tensile or compressive twins; next we anneal the dislocations while preserving the twinning structure; finally we reload the material at room temperature, where only prism slip, pyramidal slip and tensile twins are active. An analysis of the yield stress upon reload, and of the subsequent hardening response allows us to conclude that the twins play a dominant role in determining the hardening, while dislocations only have a second order effect. Published by Elsevier B.V. C1 Los Alamos Natl Lab, MPA CINT, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, LANSCE LC, Los Alamos, NM 87545 USA. RP Kaschner, GC (reprint author), Los Alamos Natl Lab, MPA CINT, MST-8, Los Alamos, NM 87545 USA. EM kaschner@lanl.gov RI Lujan Center, LANL/G-4896-2012; Misra, Amit/H-1087-2012; Tome, Carlos/D-5058-2013; Kaschner, George/H-4445-2013; OI McCabe, Rodney /0000-0002-6684-7410; Vogel, Sven C./0000-0003-2049-0361 NR 22 TC 26 Z9 27 U1 2 U2 25 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 SI SI BP 122 EP 127 DI 10.1016/j.msea.2006.09.115 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700020 ER PT J AU Mara, NA Sergueeva, AV Mara, TD McFadden, SX Mukherjee, AK AF Mara, N. A. Sergueeva, A. V. Mara, T. D. McFadden, S. X. Mukherjee, A. K. TI Superplasticity and cooperative grain boundary sliding in nanocrystalline Ni3Al SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Symposium on Processing and Mechanical Response of Engineering Materials held at the 2006 TMS Annual Meeting CY MAR 12-16, 2006 CL San Antonio, TX SP TMS DE nanocrystalline material; superplasticity; high-temperature mechanical behavior; nickel aluminide; grain boundary sliding; nanocrystalline plasticity ID DEFORMATION; PLASTICITY AB Cooperative grain boundary sliding (CGBS) has been shown to account for the majority of macroscopic strain seen in microcrystalline metallic systems undergoing superplastic deformation. While CGBS has been observed on the surface of microcrystalline samples deforming superplastically through the shifting of diamond scribe lines, there have been few transmission electron microscopy results showing such occurrences in the bulk of the material, or the details behind the micromechanism of CGBS. In this work, nanocrystalline Ni3Al produced via high-pressure torsion is deformed superplastically in the electron microscope. High-temperature (similar to 700 degrees C) in situ tensile testing shows the nature of CGBS at the nanoscale through direct observation of this phenomenon. (c) 2006 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA. Univ Calif Davis, Div Sci Mat, Davis, CA 95616 USA. Sandia Natl Labs, Livermore, CA 94550 USA. RP Mara, NA (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. EM namara@lanl.gov RI Mara, Nathan/J-4509-2014; OI Mara, Nathan/0000-0002-9135-4693 NR 19 TC 21 Z9 22 U1 2 U2 7 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 SI SI BP 238 EP 244 DI 10.1016/j.msea.2006.08.123 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700035 ER PT J AU Jarmakani, H McNaney, JM Kad, B Orlikowski, D Nguyen, JH Meyers, MA AF Jarmakani, H. McNaney, J. M. Kad, B. Orlikowski, D. Nguyen, J. H. Meyers, M. A. TI Dynamic response of single crystalline copper subjected to quasi-isentropic, gas-gun driven loading SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT Symposium on Processing and Mechanical Response of Engineering Materials held at the 2006 TMS Annual Meeting CY MAR 12-16, 2006 CL San Antonio, TX SP TMS DE isentropic compression; twinning transition; microstructural defects; laser shock; gas-gun; copper ID DISLOCATION CELL-SIZE; CONSTITUTIVE DESCRIPTION; DEFORMATION; COMPRESSION; STRAIN; STEEL; MODEL AB A transmission electron microscopy study of quasi-isentropic gas-gun loading (peak pressures between 18 and 52GPa) of [0 0 1] monocrystalline copper was carried out. The defect substructures at these different, pressures were analyzed. Current experimental evidence suggests a deformation substructure that transitions from slip to twinning, where twinning occurs at the higher pressures (similar to 52 GPa), and heavily dislocated laths and dislocation cells take place at the intermediate and lower pressures. Evidence of stacking faults at the intermediate pressures was also found. Dislocation cell sizes decreased with increasing pressure and increased with distance away, from the surface of impact. The results from the quasi-isentropic experiments are compared with those for flyer-plate and laser shock experiments reported in the literature. The Preston-Tonks-Wallace constitutive description is used to model both quasi-isentropic and shock compression experiments and predict the pressure at which the slip-twinning transition occurs in both cases. The model predicts a higher twinning transition pressure for isentropic than for shock experiments, and that twinning should not take place in the quasi-isentropic compression experiments given the loading paths investigated. Published by Elsevier B.V. C1 Univ Calif San Diego, Dept Mech & Aerosp Engn, Mat Sci Program, La Jolla, CA 92093 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Jarmakani, H (reprint author), Univ Calif San Diego, Dept Mech & Aerosp Engn, Mat Sci Program, La Jolla, CA 92093 USA. EM hjarmaka@ucsd.edu RI McNaney, James/F-5258-2013; Meyers, Marc/A-2970-2016 OI Meyers, Marc/0000-0003-1698-5396 NR 26 TC 30 Z9 31 U1 0 U2 5 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 2007 VL 463 IS 1-2 BP 249 EP 262 DI 10.1016/j.msea.2006.09.118 PG 14 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA 182YA UT WOS:000247538700037 ER PT J AU Tuncer, E Sauers, I James, DR Ellis, AR Paranthaman, MP Goyal, A More, KL AF Tuncer, Enis Sauers, Isidor Randy James, D. Ellis, Alvin R. Parans Paranthaman, M. Goyal, Amit More, Karren L. TI Enhancement of dielectric strength in nanocomposites SO NANOTECHNOLOGY LA English DT Article ID BREAKDOWN; STATISTICS; NANODIELECTRICS; PROBABILITY AB In this paper, we report the dielectric breakdown properties of a nanocomposite, a potential electrical insulation material for cryogenic high voltage applications. The material is composed of a high molecular weight polyvinyl alcohol and nanosized in situ synthesized titanate particles. The dielectric breakdown strengths of the filled material samples, measured in liquid nitrogen, indicate a significant increase in their strengths as compared to unfilled polyvinyl alcohol. We conclude that nanometre-sized particles can be adopted as a voltage stabilization additive. C1 Oak Ridge Natl Lab, Div Fus Energy, Appl Superconduct Grp, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Mat Chem Grp, Div Chem Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Superconduct & Energy Efficient Mat Grp, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Microscopy Microanal & Microstruct Grp, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Tuncer, E (reprint author), Oak Ridge Natl Lab, Div Fus Energy, Appl Superconduct Grp, POB 2008, Oak Ridge, TN 37831 USA. EM tuncere@ornl.gov RI Paranthaman, Mariappan/N-3866-2015; More, Karren/A-8097-2016; OI Paranthaman, Mariappan/0000-0003-3009-8531; More, Karren/0000-0001-5223-9097; Tuncer, Enis/0000-0002-9324-4324 NR 19 TC 52 Z9 55 U1 4 U2 28 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0957-4484 J9 NANOTECHNOLOGY JI Nanotechnology PD AUG 15 PY 2007 VL 18 IS 32 AR 325704 DI 10.1088/0957-4484/18/32/325704 PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Science & Technology - Other Topics; Materials Science; Physics GA 192VK UT WOS:000248231300017 ER PT J AU Ho, PC Singleton, J Maple, MB Harima, H Goddard, PA Henkie, Z Pietraszko, A AF Ho, Pei-Chun Singleton, J. Maple, M. B. Harima, Hisatomo Goddard, P. A. Henkie, Z. Pietraszko, A. TI A de Haas-van Alphen study of the filled skutterudite compounds PrOs4As12 and LaOs4As12 SO NEW JOURNAL OF PHYSICS LA English DT Article ID HIGH MAGNETIC-FIELDS; FERMI-SURFACE; ORDERED PHASES; GROUND-STATE; SUPERCONDUCTIVITY; CEXLA1-XB6; PROS4SB12 AB Comprehensive magnetic-field-orientation dependent studies of the susceptibility and de Haas-van Alphen effect have been carried out on single crystals of the filled skutterudites PrOs4As12 and LaOs4As12 using magnetic fields of up to 40 T. Several peaks are observed in the low-field susceptibility of PrOs4As12, corresponding to cascades of metamagnetic transitions separating the low-field antiferromagnetic and high-field paramagnetic metal ( PMM) phases. The de Haas-van Alphen experiments show that the Fermi-surface topologies of PrOs4As12 in its PMM phase and LaOs4As12 are very similar. In addition, they are in reasonable agreement with the predictions of bandstructure calculations for LaOs4As12 on the PrOs4As12 lattice. Both observations suggest that the Pr 4f electrons contribute little to the number of itinerant quasiparticles in the PMM phase. However, while the properties of LaOs4As12 suggest a conventional nonmagnetic Fermi liquid, the effects of direct exchange and electron correlations are detected in the PMM phase of PrOs4As12. For example, the C1 Univ Calif San Diego, Inst Pure & Appl Phys Sci, Dept Phys, La Jolla, CA 92093 USA. Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA. Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan. Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England. Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland. RP Ho, PC (reprint author), Univ Calif San Diego, Inst Pure & Appl Phys Sci, Dept Phys, 9500 Gilman Dr,Dept 0360, La Jolla, CA 92093 USA. EM jsingle@lanl.gov RI Goddard, Paul/A-8638-2015 OI Goddard, Paul/0000-0002-0666-5236 NR 35 TC 12 Z9 12 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1367-2630 J9 NEW J PHYS JI New J. Phys. PD AUG 15 PY 2007 VL 9 AR 269 DI 10.1088/1367-2630/9/8/269 PG 15 WC Physics, Multidisciplinary SC Physics GA 205KH UT WOS:000249111900003 ER PT J AU Stone, JR Guichon, PAM Matevosyan, HH Thomas, AW AF Stone, J. Rikovska Guichon, P. A. M. Matevosyan, H. H. Thomas, A. W. TI Cold uniform matter and neutron stars in the quark-meson-coupling model SO NUCLEAR PHYSICS A LA English DT Article ID EQUATION-OF-STATE; NUCLEAR-MATTER; DENSE MATTER; KAON CONDENSATION; PULSAR; LAMBDA; HYPERNUCLEI; POTENTIALS; DENSITIES; HYPERONS AB A new density dependent effective baryon-baryon interaction has been recently derived from the quark-meson-coupling (QMC) model, offering impressive results in application to finite nuclei and dense baryon matter. This self-consistent, relativistic, quark-level approach is used to construct the Equation of State (EoS) and to calculate key properties of high density matter and cold, slowly rotating neutron stars. The results include predictions for the maximum mass of neutron-star models, together with the corresponding radius and central density, as well the properties of neutron stars with mass of order 1.4 M-circle dot. Some conditions related to the direct URCA process are explored for the QMC EoS and the parameters relevant to slow rotation, namely the moment of inertia and the period of rotation, are investigated. The results of the calculation, which are found to be in good agreement with available observational data, are compared with the predictions of several more traditional EoS. The QMC EoS provides cold neutron-star models with maximum mass in the range 1.9-2.1 M-circle dot, with central density less than 6 times nuclear saturation density (n(0) = 0.16 fm(-3)) and offers a consistent description of the stellar mass up to this density limit. In contrast with other models, QMC predicts no hyperon contribution at densities lower than 3n(0), for matter in beta-equilibrium. At higher densities, Xi(-.0) and A hyperons are present, with consequent lowering of the maximum mass. The absence of lighter Sigma(+/-.0) hyperons is understood as consequence of including the color hyperfine interaction in the response of the quark bag to the nuclear scalar field. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Oxford, Dept Phys, Oxford OX1 3PU, England. Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA. CEA Saclay, SphN DAPNIA, F-91191 Gif Sur Yvette, France. Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Guichon, PAM (reprint author), Univ Oxford, Dept Phys, Oxford OX1 3PU, England. EM pierre.guichon@cea.fr RI Thomas, Anthony/G-4194-2012; OI Thomas, Anthony/0000-0003-0026-499X; Matevosyan, Hrayr/0000-0002-4074-7411 NR 60 TC 33 Z9 33 U1 0 U2 3 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 AUG 15 PY 2007 VL 792 IS 3-4 BP 341 EP 369 DI 10.1016/j.nuclphysa.2007.05.011 PG 29 WC Physics, Nuclear SC Physics GA 209TY UT WOS:000249412100009 ER PT J AU Wu, SSQ Soules, TF Page, RH Mitchell, SC Kanz, VK Beach, RJ AF Wu, Sheldon S. Q. Soules, Thomas F. Page, Ralph H. Mitchell, Scott C. Kanz, V. Keith Beach, Raymond J. TI Hydrocarbon-free resonance transition 795-nm rubidium laser SO OPTICS LETTERS LA English DT Article ID VAPOR AB For what we believe to be the first time, an optical resonance transition rubidium laser (5(2)P(1/2)-> 5(2)S(1/2)) has been demonstrated with a hydrocarbon-free buffer gas. Prior demonstrations of alkali resonance transition lasers have used ethane as either the buffer gas or a buffer gas component to promote rapid fine-structure mixing. However, our experience suggests that the alkali vapor reacts with the ethane producing carbon as one of the reaction products. This degrades long term laser reliability. Our recent experimental results with a "clean" helium-only buffer gas system demonstrate all the advantages of the original alkali laser system, but without the reliability issues associated with the use of ethane. (C) 2007 Optical Society of America. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA. RP Wu, SSQ (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94551 USA. EM sswu@ucsd.edu NR 11 TC 33 Z9 38 U1 0 U2 6 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD AUG 15 PY 2007 VL 32 IS 16 BP 2423 EP 2425 DI 10.1364/OL.32.002423 PG 3 WC Optics SC Optics GA 208NX UT WOS:000249327600051 PM 17700806 ER PT J AU Baker, GA Johnson, JD AF Baker, George A., Jr. Johnson, J. D. TI Corrigendum to "Series expansions for an electron-ion system" (vol 359, pg 345, 2006) SO PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS LA English DT Correction C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Baker, GA (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 USA. EM gbj@lani.gov NR 3 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4371 J9 PHYSICA A JI Physica A PD AUG 15 PY 2007 VL 382 IS 2 BP 765 EP 768 DI 10.1016/j.physa.2007.04.115 PG 4 WC Physics, Multidisciplinary SC Physics GA 192JW UT WOS:000248198800039 ER PT J AU Katz, RF Knepley, MG Smith, B Spiegelman, M Coon, ET AF Katz, R. F. Knepley, M. G. Smith, B. Spiegelman, M. Coon, E. T. TI Numerical simulation of geodynamic processes with the portable extensible toolkit for scientific computation SO PHYSICS OF THE EARTH AND PLANETARY INTERIORS LA English DT Article; Proceedings Paper CT AGU Western Pacific Geophysical Meeting CY JUL 24-28, 2006 CL Beijing, PEOPLES R CHINA SP AGU DE scientific computation; parallel computation; geodynamics; mid-ocean ridge; PETSc ID 3-DIMENSIONAL PASSIVE FLOW; OCEANIC SPREADING RIDGES; DEFORMABLE POROUS-MEDIA; EAST PACIFIC RISE; MANTLE BENEATH; SOLITARY WAVES; MELT SEGREGATION; MIDOCEAN RIDGES; MAGMATIC SEGMENTATION; VARIABLE VISCOSITY AB Geodynamics simulations are characterized by theological nonlinearity, localization, three-dimensional effects, and separate but interacting length scales. These features represent a challenge for computational science. We discuss how a leading software framework for advanced scientific computing (the Portable Extensible Toolkit for Scientific Computation, PETSc) can facilitate the development of geodynamics simulations. To illustrate our use of PETSc, we describe simulations of (i) steady-state, non-Newtonian passive flow and thermal structure beneath a mid-ocean ridge, (ii) magmatic solitary waves in the mantle, and (iii) the formation of localized bands of high porosity in a two-phase medium being deformed under simple shear. We highlight two supplementary features of PETSc, structured storage of application parameters and self-documenting output, that are especially useful for geodynamics simulations. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England. Argonne Natl Lab, Math & Comp Sci Div, Argonne, IL 60439 USA. Columbia Univ, Lamont Doherty Earth Observ, New York, NY 10027 USA. Columbia Univ, Dept Appl Math & Phys, New York, NY 10027 USA. RP Katz, RF (reprint author), Univ Cambridge, Dept Appl Math & Theoret Phys, Wilberforce Rd, Cambridge CB3 0WA, England. EM rfk22@cam.ac.uk RI Katz, Richard/D-3364-2009 OI Katz, Richard/0000-0001-8746-5430 NR 61 TC 37 Z9 38 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0031-9201 J9 PHYS EARTH PLANET IN JI Phys. Earth Planet. Inter. PD AUG 15 PY 2007 VL 163 IS 1-4 BP 52 EP 68 DI 10.1016/j.pepi.2007.04.016 PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 210VH UT WOS:000249483200005 ER PT J AU Aramini, JM Huang, YJ Swapna, GVT Cort, JR Rajan, PK Xiao, R Shastry, R Acton, TB Liu, J Rost, B Kennedy, MA Montelione, GT AF Aramini, James M. Huang, Yuanpeng J. Swapna, G. V. T. Cort, John R. Rajan, P. K. Xiao, Rong Shastry, Ritu Acton, Thomas B. Liu, Jinfeng Rost, Burkhard Kennedy, Michael A. Montelione, Gaetano T. TI Solution NMR structure of Escherichia coli ytfP expands the structural coverage of the UPF0131 protein domain family SO PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS LA English DT Article ID RESONANCE ASSIGNMENTS; CRYSTAL-STRUCTURE; SOFTWARE SUITE; GENOMICS; ALIGNMENT; SYSTEM; VALIDATION; BUTIROSIN; FOLD; C-13 C1 Rutgers State Univ, CABM, Dept Mol Biol & Biochem, Piscataway, NJ 08854 USA. Rutgers State Univ, NE Struct Genom Consortium, Piscataway, NJ 08854 USA. Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Columbia Univ, Dept Biochem & Mol Biophys, New York, NY 10032 USA. Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Biochem, Piscataway, NJ 08854 USA. RP Aramini, JM (reprint author), Rutgers State Univ, CABM, Dept Mol Biol & Biochem, 679 Hoes Lane, Piscataway, NJ 08854 USA. EM jma@cabm.rutgers.edu; guy@cabm.rutgers.edu OI Liu, Jinfeng/0000-0002-0343-8222 FU NIGMS NIH HHS [U54-GM074958] NR 36 TC 4 Z9 5 U1 0 U2 3 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0887-3585 EI 1097-0134 J9 PROTEINS JI Proteins PD AUG 15 PY 2007 VL 68 IS 3 BP 789 EP 795 DI 10.1002/prot.21450 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 189UB UT WOS:000248012900019 PM 17523190 ER PT J AU Tomasi, D Goldstein, RZ Telang, F Maloney, T Alia-Klein, N Caparelli, EC Volkow, ND AF Tomasi, Dardo Goldstein, Rita Z. Telang, Frank Maloney, Thomas Alia-Klein, Nelly Caparelli, Elisabeth C. Volkow, Nora D. TI Thalamo-cortical dysfunction in cocaine abusers: Implications in attention and perception SO PSYCHIATRY RESEARCH-NEUROIMAGING LA English DT Article DE fMRI; PET; visual attention; dopamine; norepinephrine; addict ID LATERAL GENICULATE-NUCLEUS; ANTERIOR CINGULATE CORTEX; WORKING-MEMORY; PREFRONTAL CORTEX; VISUAL-ATTENTION; PARKINSONS-DISEASE; LOCUS-COERULEUS; HUMAN BRAIN; DOPAMINERGIC MODULATION; COGNITIVE IMPAIRMENT AB Cocaine affects sensory perception and attention, but little is known about the neural substrates underlying these effects in the human brain. We used functional magnetic resonance imaging (fMRI) and a sustained visuospatial attention task to assess if the visual attention network is dysfunctional in cocaine abusers (n = 14) compared to age-, gender-, and education-matched controls (n= 14). Compared with controls, cocaine abusers showed (1) hypo-activation of the thalamus, which may reflect noradrenergic and/or dopaminergic deficits; (2) hyper-activation in occipital and prefrontal cortices, which may reflect increased visual cortical processing to compensate for inefficient visual thalamic processing; and (3) larger deactivation of parietal and frontal regions possibly to support the larger hemodynamic supply to the hyper-activated brain regions. These findings provide evidence of abnormalities in thalamo-cortical responses in cocaine abusers that are likely to contribute to the impairments in sensory processing and in attention. The development of therapies that diminish these thalamo-cortical deficits could improve the treatment of cocaine addiction. Published by Elsevier Ireland Ltd. C1 Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. Natl Inst Drug Abuse, Bethesda, MD USA. RP Tomasi, D (reprint author), Brookhaven Natl Lab, Dept Med, Bldg 490,30 Bell Ave, Upton, NY 11973 USA. EM tomasi@bnl.gov RI Tomasi, Dardo/J-2127-2015 FU NCRR NIH HHS [M01 RR010710, M01-RR-10710]; NIDA NIH HHS [R03 DA 017070-01, K23 DA015517, K23 DA15517-01, R03 DA017070, R03 DA017070-01] NR 84 TC 61 Z9 62 U1 4 U2 10 PU ELSEVIER IRELAND LTD PI CLARE PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000, IRELAND SN 0925-4927 J9 PSYCHIAT RES-NEUROIM JI Psychiatry Res. Neuroimaging PD AUG 15 PY 2007 VL 155 IS 3 BP 189 EP 201 DI 10.1016/j.pseychresns.2007.03.002 PG 13 WC Clinical Neurology; Neuroimaging; Psychiatry SC Neurosciences & Neurology; Psychiatry GA 203JV UT WOS:000248971800002 PM 17582746 ER PT J AU Meklin, T Reponen, T McKinstry, C Cho, SH Gninshpun, SA Nevalainen, A Vepsalainen, A Haugland, RA LeMasters, G Vesper, SJ AF Meklin, Teija Reponen, Tiina McKinstry, Craig Cho, Seung-Hyun Gninshpun, Sergey A. Nevalainen, Aino Vepsalainen, Asko Haugland, Richard A. LeMasters, Grace Vesper, Stephen J. TI Comparison of mold concentrations quantified by MSQPCR in indoor and outdoor air sampled simultaneously SO SCIENCE OF THE TOTAL ENVIRONMENT LA English DT Article DE mold; indoor air; outdoor air; mold specific quantitative PCR ID QUANTITATIVE PCR ANALYSIS; FUNGI; HOMES; INFANTS; ASTHMA; WATER; DUST AB Mold specific quantitative PCR (MSQPCR) was used to measure the concentrations of the 36 mold species in indoor and outdoor air samples that were taken simultaneously for 48 h in and around 17 homes in Cincinnati, Ohio. The total spore concentrations of 353 per m(3) of indoor air and 827 per m(3) of outdoor air samples were significantly different (p <= 0.05). However, only the concentrations of Aspergillus penicillioides, Cladosporium cladosporioides types 1 and 2 and Cladosporium herbarum were correlated in indoor and outdoor air samples (p-value <= 0.05 and sufficient data for estimate and absolute value rho estimate >= 0.5). These results suggest that interpretation of the meaning of short-term (<48 h) mold measurements in indoor and outdoor air samples must be made with caution. (C) 2007 Elsevier B.V. All fights reserved. C1 US EPA, Cincinnati, OH 45268 USA. Pacific NW Natl Lab, Richland, WA USA. Univ Cincinnati, Dept Environm Hlth, Cincinnati, OH USA. RP Vesper, SJ (reprint author), US EPA, 26 W Ml L King Dr, Cincinnati, OH 45268 USA. EM vesper.stephen@epa.gov FU NIEHS NIH HHS [R01 ES011170, R01 ES11170, R01 ES011170-05S1] NR 15 TC 20 Z9 20 U1 5 U2 17 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0048-9697 J9 SCI TOTAL ENVIRON JI Sci. Total Environ. PD AUG 15 PY 2007 VL 382 IS 1 BP 130 EP 134 DI 10.1016/j.scitotenv.2007.03.031 PG 5 WC Environmental Sciences SC Environmental Sciences & Ecology GA 194CT UT WOS:000248322300013 PM 17467772 ER PT J AU Bode, M Krause, S Berbil-Bautista, L Heinze, S Wiesendanger, R AF Bode, M. Krause, S. Berbil-Bautista, L. Heinze, S. Wiesendanger, R. TI On the preparation and electronic properties of clean W(110) surfaces SO SURFACE SCIENCE LA English DT Article DE scanning tunneling microscopy; scanning tunneling spectroscopies; tungsten; tungsten oxide; single crystal surfaces; surface segregation; surface electronic phenomena ID SCANNING TUNNELING SPECTROSCOPY; TUNGSTEN 110 SURFACE; ADSORPTION; SPECTRA; OXYGEN; CRYSTALLOGRAPHY; PHOTOEMISSION; MICROSCOPE; SCATTERING; FE(110) AB We have studied the influence of oxygen pressure during the cyclic annealing used for the cleaning of W(I 10) surfaces. For this purpose the surface morphology and electronic properties are measured by means of scanning tunneling microscopy (STM) and spectroscopy (STS), respectively. It is found that the surfaces with impurity atom densities as low as 2 x 10(-3) can be obtained by gradually reducing the oxygen pressure between subsequent annealing cycles down to about 2 x 10(-8) mbar in the final cycle. Only on the clean surface a bias-dependent spatial modulation of the local density of states (LDOS) is observed at step edges and around impurity sites by STS. In addition, we find a pronounced peak in the occupied states. In combination with density functional theory calculations these features can be traced back to a dispersive p(z)-d(xz)-type surface resonance band and the lower band edge of a surface state, respectively. Published by Elsevier B.V. C1 Univ Hamburg, Inst Phys Appl, D-20355 Hamburg, Germany. Univ Hamburg, Microstruct Res Ctr, D-20355 Hamburg, Germany. RP Bode, M (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. EM mbode@anl.gov RI Krause, Stefan/C-8491-2009; Wiesendanger, Roland/P-9726-2016; Bode, Matthias/S-3249-2016 OI Wiesendanger, Roland/0000-0002-0472-4183; Bode, Matthias/0000-0001-7514-5560 NR 36 TC 38 Z9 38 U1 3 U2 29 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 15 PY 2007 VL 601 IS 16 BP 3308 EP 3314 DI 10.1016/j.susc.2007.06.017 PG 7 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 207WU UT WOS:000249282600006 ER PT J AU Szymanski, P Harris, AL Camillone, N AF Szymanski, P. Harris, A. L. Camillone, N., III TI Temperature-dependent electron-mediated coupling in subpicosecond photoinduced desorption SO SURFACE SCIENCE LA English DT Article DE solid-gas interfaces; dynamics; desorption induced by electronic transitions; desorption induced by photon stimulation; computer simulations; models of surface chemical reactions; oxygen; palladium ID FEMTOSECOND LASER-PULSES; METAL-SURFACES; CO; ADSORBATE; DYNAMICS; OXYGEN; CHEMISTRY; PT(111); EXCITATION; PHONON AB We compare the adequacy of empirical frictional-coupling models to simulate the femtosecond-laser-induced desorption of molecular oxygen from Pd(111). We find that a model that incorporates temperature-dependent frictional coupling provides a superior description of the experimental observations compared to those incorporating temperature-independent frictional coupling. The implication is that the electron-mediated substrate-adsorbate coupling strength is dependent on the temperature of the substrate electronic distribution. There have been theoretical predictions of temperature-dependent coupling [M. Brandbyge, P. Hedegard, T.F. Heinz, J.A. Misewich, D.M. Newns, Phys. Rev. B 52 (1995) 6042; J.C. Tully, M. Gomez, M. Head-Gordon, J. Vac. Sci. Technol. A 11 (1993) 1914], and dependence of the efficiency of surface-molecule energy transfer on the electronic temperature is consistent with a resonance-enhanced process believed to be responsible for the photoinduced desorption in this and related systems. The model we describe also provides a simple explanation for the biexponential decay observed in the time-resolved correlation experiments. (C) 2007 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Camillone, N (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. EM nicholas@bnl.gov NR 51 TC 13 Z9 13 U1 2 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 15 PY 2007 VL 601 IS 16 BP 3335 EP 3349 DI 10.1016/j.susc.2007.06.004 PG 15 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 207WU UT WOS:000249282600009 ER PT J AU Wearing, LH Smerdon, JA Leung, L Lograsso, TA Ross, AR McGrath, R AF Wearing, L. H. Smerdon, J. A. Leung, L. Lograsso, T. A. Ross, A. R. McGrath, R. TI Iron deposition on the five-fold surface of the icosahedral Al-Pd-Mn quasicrystal SO SURFACE SCIENCE LA English DT Article DE STM; LEED; epitaxy; quasicrystal; iron ID AUGER-ELECTRON SPECTROSCOPY; GROWTH; FE; DIFFRACTION; AL(001); FILMS; MODEL; LAYER; VIEW AB The room temperature adsorption behaviour of Fe on the five-fold surface of i-Al-Pd-Mn has been studied using scanning tunneling microscopy (STM), low energy electron diffraction (LEED), and Auger electron spectroscopy (AES). A complex growth scenario for Fe adsorption on this substrate is observed with STM. At coverages up to about 3 MLE (monolayer equivalent), layer-by-layer growth is observed whereby small clusters and islands are formed which eventually coalesce into almost complete monolayers. No LEED pattern is observed, indicating that the layers are disordered. The AES results rule out intermixing. Above this coverage, there is a transition to a multilayer island growth mode. The islands are rotated by 72 degrees and have the bcc(110) Fe structure. The results are compared with previous work on Fe adsorption on this substrate and on Al and Fe single crystal substrates. (C) 2007 Elsevier B.V. All rights reserved. C1 Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England. Univ Liverpool, Surface Sci Res Ctr, Liverpool L69 3BX, Merseyside, England. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP McGrath, R (reprint author), Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England. EM mcgrath@liv.ac.uk RI McGrath, Ronan/A-1568-2009 OI McGrath, Ronan/0000-0002-9880-5741 NR 34 TC 9 Z9 9 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 15 PY 2007 VL 601 IS 16 BP 3450 EP 3455 DI 10.1016/j.susc.2007.06.028 PG 6 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 207WU UT WOS:000249282600021 ER PT J AU Kelber, J Magtoto, N Vamala, C Jain, M Jennison, DR Schultz, PA AF Kelber, J. Magtoto, N. Vamala, C. Jain, M. Jennison, D. R. Schultz, P. A. TI Reactivities of ultrathin alumina films exposed to intermediate pressures of H2O: Substrate-mediated mechanism for growth and loss of surface order SO SURFACE SCIENCE LA English DT Article DE low index single crystal surfaces; aluminum oxide; density functional calculations; oxidation; Auger electron spectroscopy; low energy electron diffraction ID AUGER-ELECTRON-SPECTROSCOPY; WATER-VAPOR; UHV CONDITIONS; OXIDE FILM; OXIDATION; ALPHA-AL2O3(0001); PSEUDOPOTENTIALS; AL2O3/NI3AL(110); INSTABILITY; NI3AL(110) AB The response of ordered ultrathin Al2O3 films on NiAl(110) and Ni3Al(110) substrates to sequential exposures at varying pressures of H2O between 10(-7) Torr and 10(-3) Torr, ambient temperature, was characterized by LEED, AES and density functional theory (DFT) calculations. In all cases, an increase in average oxide thickness, as determined by AES, was observed, consistent with a field-induced oxide growth mechanism. Ordered oxide films of initial average thicknesses of 7 angstrom and 12 angstrom grown on NiAl(110) achieved a limiting thickness of 17(1) angstrom, while films of initial thickness of 7 angstrom and 12 angstrom grown on Ni3Al(110) achieved a limiting thickness of 12(1) A. The LEED patterns for the thinner (7 angstrom) films were not observed after exposure to 10(-5) Torr (NiAl(110)), or 10(-4) Torr (NiAl(110)). In contrast, LEED patterns for the films of greater initial thickness persisted after exposures to 10(-3) Torr UHV. DFT calculations indicate an Al vacancy formation energy that is significantly greater (by similar to 0.5 eV) on the surface that has the thicker oxide film, directly opposite to what may be naively expected. A simple coordination argument supports these numerical results. Therefore, the greater limiting oxide thickness observed on NiAl(110) demonstrates that the rate determining step in the oxide growth process is not Al removal from the metal substrate and transport across the oxide/metal interface. Instead, the results indicate that the determining factor in the oxide growth mechanism is the kinetic barrier to Al diffusion from the substrate bulk to the oxide/metal interface. The persistence of the LEED patterns observed for the films of greater initial oxide thickness indicates that the surface disorder generally observed for alumina films grown on aluminide substrates and exposed to intermediate pressures of H2O is due to the growth of a disordered alumina layer over an ordered substrate, rather than to direct H2O interaction with terrace sites. (C) 2007 Elsevier B.V. All rights reserved. C1 Univ N Texas, Dept Chem, Denton, TX 76203 USA. Univ N Texas, Dept Mat Sci, Denton, TX 76203 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Kelber, J (reprint author), Univ N Texas, Dept Chem, Denton, TX 76203 USA. EM kelber@unt.edu NR 38 TC 9 Z9 9 U1 1 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 EI 1879-2758 J9 SURF SCI JI Surf. Sci. PD AUG 15 PY 2007 VL 601 IS 16 BP 3464 EP 3471 DI 10.1016/j.susc.2007.06.036 PG 8 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA 207WU UT WOS:000249282600023 ER PT J AU Yamagishi, J Burnett, ED Harwood, SH Blissard, GW AF Yamagishi, Junya Burnett, Erik D. Harwood, Steven H. Blissard, Gary W. TI The AcMNPV pp31 gene is not essential for productive AcMNPV replication or late gene transcription but appears to increase levels of most viral transcripts SO VIROLOGY LA English DT Article DE baculovirus; lef gene; pp3l ID NUCLEAR POLYHEDROSIS-VIRUS; AUTOGRAPHA-CALIFORNICA NUCLEOPOLYHEDROVIRUS; IN-VITRO TRANSCRIPTION; SPODOPTERA-FRUGIPERDA CELLS; MESSENGER-RNA INITIATION; IMMEDIATE-EARLY GENE; DELAYED-EARLY GENE; BACULOVIRUS GENE; NUCLEOTIDE-SEQUENCE; MULTICAPSID NUCLEOPOLYHEDROVIRUS AB The pp31 gene of Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV) encodes a phosphorylated DNA binding protein that associates with virogenic stroma in the nuclei of infected cells. Prior studies of pp31 by transient late expression assays suggested that pp3l may play an important role in transcription of AcMNPV late genes [Todd, J. W., Passarelli, A. L., and Miller, L. K. (1995). Eighteen baculovirus genes, including lef-11, p35, 39K, and p47, support late gene expression. J. Virol. 69, 968-974] although genetic studies of the closely related BmNPV pp3l gene suggested that pp31 may be dispensable [Gomi, S., Zhou, C. E., Yih, W., Majima, K., and Maeda, S. (1997). Deletion analysis of four of eighteen late gene expression factor gene homologues of the baculovirus, BmNPV. Virology 230 (1), 35-47]. In the current study, we examined the role of the pp3l gene in the context of the AcMNPV genome during infection. We used a BACmid-based system to generate a pp3l knockout in the AcMNPV genome. The pp3l knockout was subsequently rescued by reinserting the pp3l gene into the polyhedrin locus of the same virus genome. We found that pp3l was not essential for viral replication although the absence of pp3l resulted in a lower viral titer. Analysis of viral DNA replication in the absence of pp3l showed that the kinetics of viral DNA replication were unaffected. An AcMNPV oligonucleotide microarray was used to compare gene expression from all AcMNPV genes in the presence or absence of pp31. In the absence of pp31, a modest reduction in transcripts was detected for many viral genes (99 genes) while no substantial increase or decrease was observed for 43 genes. Transcripts from 6 genes (p6.9, ORF 97, ORF 60, ORF 98, ORF 102 and chitinase) were reduced by 66% or more compared to the levels detected from the control virus. Microarray results were further examined by qPCR analysis of selected genes. In combination, these data show that deletion of the pp3l gene was not lethal and did not appear to affect viral DNA replication but resulted in an apparent modest down-regulation of a subset of AcMNPV genes that included both early and late genes. (c) 2007 Elsevier Inc. All rights reserved. C1 Cornell Univ, Boyce Thompson Inst Plant Res, Ithaca, NY 14853 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Blissard, GW (reprint author), Cornell Univ, Boyce Thompson Inst Plant Res, Tower Rd, Ithaca, NY 14853 USA. EM gwb1@cornell.edu RI Blissard, Gary/H-5544-2012; OI Blissard, Gary/0000-0001-9228-567X FU NIAID NIH HHS [R01 AI033657-12, R01 AI033657] NR 82 TC 23 Z9 32 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0042-6822 J9 VIROLOGY JI Virology PD AUG 15 PY 2007 VL 365 IS 1 BP 34 EP 47 DI 10.1016/j.virol.2007.02.034 PG 14 WC Virology SC Virology GA 183PO UT WOS:000247584900004 PM 17467768 ER PT J AU Luo, F Yang, Y Zhong, J Gao, H Khan, L Thompson, DK Zhou, J AF Luo, Feng Yang, Yunfeng Zhong, Jianxin Gao, Haichun Khan, Latifur Thompson, Dorothea K. Zhou, Jizhong TI Constructing gene co-expression networks and predicting functions of unknown genes by random matrix theory SO BMC BIOINFORMATICS LA English DT Article ID YEAST SACCHAROMYCES-CEREVISIAE; REGULATORY NETWORKS; BIOLOGICAL NETWORKS; SHEWANELLA-ONEIDENSIS; EXPRESSION PROFILES; PROTEIN COMPLEXES; ESCHERICHIA-COLI; ORGANIZATION; CELLS; MODULES AB Background: Large-scale sequencing of entire genomes has ushered in a new age in biology. One of the next grand challenges is to dissect the cellular networks consisting of many individual functional modules. Defining co-expression networks without ambiguity based on genome-wide microarray data is difficult and current methods are not robust and consistent with different data sets. This is particularly problematic for little understood organisms since not much existing biological knowledge can be exploited for determining the threshold to differentiate true correlation from random noise. Random matrix theory (RMT), which has been widely and successfully used in physics, is a powerful approach to distinguish system-specific, non-random properties embedded in complex systems from random noise. Here, we have hypothesized that the universal predictions of RMT are also applicable to biological systems and the correlation threshold can be determined by characterizing the correlation matrix of microarray profiles using random matrix theory. Results: Application of random matrix theory to microarray data of S. oneidensis, E. coli, yeast, A. thaliana, Drosophila, mouse and human indicates that there is a of nearest neighbour spacing distribution (NNSD) of correlation matrix after gradually removing certain elements insider the matrix. Testing on an in silico modular model has demonstrated that this transition can be used to determine the correlation threshold for revealing modular co-expression networks. The co-expression network derived from yeast cell cycling microarray data is supported by gene annotation. The topological properties of the resulting co-expression network agree well with the general properties of biological networks. Computational evaluations have showed that RMT approach is sensitive and robust. Furthermore, evaluation on sampled expression data of an in silico modular gene system has showed that under-sampled expressions do not affect the recovery of gene co-expression network. Moreover, the cellular roles of 215 functionally unknown genes from yeast, E. coli and S. oneidensis are predicted by the gene co-expression networks using guilt-by-association principle, many of which are supported by existing information or our experimental verification, further demonstrating the reliability of this approach for gene function prediction. Conclusion: Our rigorous analysis of gene expression microarray profiles using RMT has showed that the transition of NNSD of correlation matrix of microarray profile provides a profound theoretical criterion to determine the correlation threshold for identifying gene co-expression networks. C1 [Luo, Feng; Yang, Yunfeng; Gao, Haichun; Thompson, Dorothea K.; Zhou, Jizhong] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. [Zhong, Jianxin] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. [Zhong, Jianxin] Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China. [Khan, Latifur] Univ Texas Richardson, Dept Comp Sci, Richardson, TX 75083 USA. [Luo, Feng] Clemson Univ, Sch Comp, Clemson, SC 29634 USA. [Thompson, Dorothea K.] Purdue Univ, Dept Biol Sci, W Lafayette, IN 47907 USA. [Gao, Haichun; Zhou, Jizhong] Univ Oklahoma, Inst Environm Genom, Norman, OK 73019 USA. [Gao, Haichun; Zhou, Jizhong] Univ Oklahoma, Dept Bot & Microbiol, Norman, OK 73019 USA. RP Zhou, J (reprint author), Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA. EM luofeng@cs.clemson.edu; yangy@ornl.gov; zhongjn@ornl.gov; gaoh@ornl.gov; lkhan@utdallas.edu; dthomps@purdue.edu; jzhou@ou.edu RI Yang, Yunfeng/H-9853-2013; Gao, Haichun/A-2160-2014 OI Yang, Yunfeng/0000-0001-8274-6196; NR 60 TC 70 Z9 74 U1 2 U2 38 PU BIOMED CENTRAL LTD PI LONDON PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND SN 1471-2105 J9 BMC BIOINFORMATICS JI BMC Bioinformatics PD AUG 14 PY 2007 VL 8 AR 299 DI 10.1186/1471-2105-8-299 PG 17 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Mathematical & Computational Biology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Mathematical & Computational Biology GA 253WH UT WOS:000252547800001 PM 17697349 ER PT J AU Agbo, JK Leitner, DM Myshakin, EM Jordan, KD AF Agbo, Johnson K. Leitner, David M. Myshakin, Evgeniy M. Jordan, Kenneth D. TI Quantum energy flow and the kinetics of water shuttling between hydrogen bonding sites on trans-formanilide SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID NON-RRKM REACTION; CONFORMATIONAL ISOMERIZATION; VIBRATIONAL REDISTRIBUTION; MOLECULAR ISOMERIZATION; FLEXIBLE MOLECULES; BASIS-SETS; DYNAMICS; HYDRATION; PHOTOISOMERIZATION; LOCALIZATION AB A potential energy surface for trans-formanilide (TFA)-H(2)O is calculated and applied to study energy flow in the complex as well as the kinetics of water shuttling between hydrogen bonding sites on TFA. In addition to the previously identified H(2)O-TFA(C = O) and H(2)O-TFA(NH) minima, with the water monomer bound to the C = O and NH groups, respectively, the new surface reveals a second local minimum with the water bound to the C = O group, and which lies energetically 310 cm(-1) above the previously identified H(2)O-TFA(C = O) global minimum. On this surface, the energy barrier for water shuttling from H(2)O-TFA(C = O) global minimum to H(2)O-TFA(N-H) is 984 cm(-1), consistent with the experimental bounds of 796 and 988 cm(-1) [J. R. Clarkson Science 307, 1443 (2005)]. The ergodicity threshold of TFA is calculated to be 1450 cm(-1); for the TFA-H(2)O complex, the coupling to the water molecule is found to lower the ergodicity threshold to below the isomerization barrier. Energy transfer between the activated complex and the vibrational modes of TFA is calculated to be sufficiently rapid that the Rice-Ramsperger-Kassel-Marcus (RRKM) theory does not overestimate the rate of water shuttling. The possibility that the rate constant for water shuttling is higher than the RRKM theory estimate is discussed in light of the relatively high energy of the ergodicity threshold calculated for TFA. (C) 2007 American Institute of Physics. C1 Univ Nevada, Dept Chem & Chem Phys Program, Reno, NV 89557 USA. US DOE, Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. Parsons Project Serv Inc, South Pk, PA 15129 USA. Univ Pittsburgh, Dept Chem, Pittsburgh, PA 15260 USA. Univ Pittsburgh, Ctr Mol & Mat Simulat, Pittsburgh, PA 15260 USA. RP Leitner, DM (reprint author), Univ Nevada, Dept Chem & Chem Phys Program, Reno, NV 89557 USA. EM dml@unr.edu; ken@visual1.chem.pitt.edu NR 40 TC 10 Z9 10 U1 0 U2 6 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 14 PY 2007 VL 127 IS 6 AR 064315 DI 10.1063/1.2754689 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 200JS UT WOS:000248760300023 PM 17705604 ER PT J AU Niklasson, AMN Weber, V AF Niklasson, Anders M. N. Weber, Valery TI Linear scaling density matrix perturbation theory for basis-set-dependent quantum response calculations: An orthogonal formulation SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRONIC-STRUCTURE CALCULATIONS; CONSISTENT-FIELD THEORY; NONLINEAR OPTICAL-PROPERTIES; MOLECULAR-DYNAMICS; PURIFICATION; CONSTRUCTION; PROJECTION; ORBITALS; SYSTEMS; ATOMS AB Linear scaling density matrix perturbation theory [A. M. N. Niklasson and M. Challacombe, Phys. Rev. Lett. 92, 193001 (2004)] is extended to basis-set-dependent quantum response calculations for a nonorthogonal basis set representation. The generalization is achieved by a perturbation-dependent congruence transform, derived from the factorization of the inverse overlap matrix, which transforms the generalized eigenvalue problem to an orthogonal, standard form. With this orthogonalization transform the basis-set-dependent perturbation in the overlap matrix is included in the orthogonalized Hamiltonian, which is expanded in orders of the perturbation. In this way density matrix perturbation theory developed for an orthogonal representation can be applied also to basis-set-dependent response calculations. The method offers an alternative to the previous solution of the basis-set-dependent response problem, based on a nonorthogonal generalization of the density matrix perturbation theory, where the calculations are performed within a purely nonorthogonal setting [A. M. N. Niklasson , J. Chem. Phys. 123, 44107 (2005)]. (C) 2007 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden. RP Niklasson, AMN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM amn@lanl.gov NR 60 TC 19 Z9 19 U1 1 U2 13 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 14 PY 2007 VL 127 IS 6 AR 064105 DI 10.1063/1.2755775 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 200JS UT WOS:000248760300005 PM 17705586 ER PT J AU Rubio-Lago, L Zaouris, D Sakellariou, Y Sofikitis, D Kitsopoulos, TN Wang, F Yang, X Cronin, B Devine, AL King, GA Nix, MGD Ashfold, MNR Xantheas, SS AF Rubio-Lago, L. Zaouris, D. Sakellariou, Y. Sofikitis, D. Kitsopoulos, T. N. Wang, F. Yang, X. Cronin, B. Devine, A. L. King, G. A. Nix, M. G. D. Ashfold, M. N. R. Xantheas, S. S. TI Photofragment slice imaging studies of pyrrole and the Xe center dot center dot center dot pyrrole cluster SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID REPULSIVE (1)PI-SIGMA-ASTERISK STATES; PHOTODISSOCIATION DYNAMICS; CONICAL INTERSECTIONS; EXCITED-STATE; BASIS-SETS; ABSORPTION; ELECTRON; SPECTROSCOPY; ULTRAVIOLET; MOLECULES AB The photolysis of pyrrole has been studied in a molecular beam at wavelengths of 250, 240, and 193.3 nm, using two different carrier gases, He and Xe. A broad bimodal distribution of H-atom fragment velocities has been observed at all wavelengths. Near threshold at both 240 and 250 nm, sharp features have been observed in the fast part of the H-atom distribution. Under appropriate molecular beam conditions, the entire H-atom loss signal from the photolysis of pyrrole at both 240 and 250 nm (including the sharp features) disappear when using Xe as opposed to He as the carrier gas. We attribute this phenomenon to cluster formation between Xe and pyrrole, and this assumption is supported by the observation of resonance enhanced multiphoton ionization spectra for the (Xe center dot center dot center dot pyrrole) cluster followed by photofragmentation of the nascent cation cluster. Ab initio calculations are presented for the ground states of the neutral and cationic (Xe center dot center dot center dot pyrrole) clusters as a means of understanding their structural and energetic properties. (C) 2007 American Institute of Physics. C1 Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Greece. Univ Crete, Dept Chem, Iraklion 71110, Greece. State Key lab Mol React Dynam, Dalian 116023, Peoples R China. Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England. Pacific NW Natl Lab, Div Mat & Chem Sci, Richland, WA 99352 USA. RP Kitsopoulos, TN (reprint author), Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Greece. RI Zaouris, Dimitrios/D-9192-2011; Yang, Xueming/C-8764-2013; Nix, Michael/G-9447-2013; Zaouris, Dimitrios/J-6927-2013; Kitsopoulos, Theofanis/A-8355-2014; Xantheas, Sotiris/L-1239-2015; Sofikitis, Dimitrios/F-9620-2010; OI ashfold, michael/0000-0001-5762-7048; Zaouris, Dimitrios/0000-0001-8298-1380; Zaouris, Dimitrios/0000-0001-8298-1380; Xantheas, Sotiris/0000-0002-6303-1037 NR 28 TC 30 Z9 30 U1 0 U2 16 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 14 PY 2007 VL 127 IS 6 AR 064306 DI 10.1063/1.2754688 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 200JS UT WOS:000248760300014 PM 17705595 ER PT J AU Small, DW Head-Gordon, M AF Small, David W. Head-Gordon, Martin TI Correction to constrained coupled cluster doubles models based on the second coupled cluster central moment SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SINGLE-REFERENCE FORMALISM; AUXILIARY BASIS-SETS; WAVE-FUNCTION; EQUATIONS; ENERGY; CONVERGENCE; CHEMISTRY; SYSTEMS; STATES AB We develop a correction for the coupled cluster version of the perfect pairing (PP) model. The correction is based on finding modified values of the PP amplitudes such that the second coupled cluster central moment defined in the space of all valence single and double substitutions vanishes and, subject to this constraint, minimizing the deviation between the modified and unmodified PP amplitudes with respect to a chosen metric. We discuss how this correction can be generalized to other constrained doubles models, such as local correlation and active-space models. While the correction is not strictly size consistent and retains some of the deficiencies of the PP model, numerical results indicate that much of the missing active-space coupled cluster singles and doubles correlation energy is recovered. (C) 2007 American Institute of Physics. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Small, DW (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. NR 42 TC 2 Z9 2 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 14 PY 2007 VL 127 IS 6 AR 064102 DI 10.1063/1.2752812 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 200JS UT WOS:000248760300002 PM 17705583 ER PT J AU Cai, T Marquez, M Hu, ZB AF Cai, Tong Marquez, Manuel Hu, Zhibing TI Monodisperse thermoresponsive microgels of poly(ethylene glycol) analogue-based biopolymers SO LANGMUIR LA English DT Article ID N-ISOPROPYLACRYLAMIDE; 2-(2-METHOXYETHOXY)ETHYL METHACRYLATE; THERMOSENSITIVE POLYMERS; PHASE-TRANSITIONS; DRUG-DELIVERY; HYDROGELS; MEMBRANE; RELEASE AB Monodisperse microgels of P(MEO(2)MA-co-OEGMA) have been synthesized by using free radical polymerization. Microuels with a variety of particle radii ranging from 82 to 412 nm have been obtained with different surfactant concentrations. The particle size distribution is extremely narrow and even better than that for PNIPAM microgels. Pure MEO(2)MA microgels have an LCST of about 22 degrees C. The LCSTs corresponding to the molar ratio of OEGMA to MEO(2)MA at 10 and 20% are 31 and 37 degrees C, respectively. Microgels in water self-assemble into various phases, including a crystalline phase with iridescent colors, which are the result of Bragg diffraction from differently oriented crystalline planes. Considering that PEG is nontoxic and anti-immunogenic as proven by the FDA, thermoresponsive P(MEO(2)MA-co-OEGMA) microgels may have many exciting biomedical applications. C1 Univ N Texas, Dept Phys, Denton, TX 76203 USA. Philip Morris Inc, INEST Grp Postgrad Program, Richmond, VA 23234 USA. Philip Morris Inc, Res Ctr, Richmond, VA 23234 USA. Arizona State Univ, Harrington Dept Bioengn, Tempe, AZ 85287 USA. NIST Ctr Theoret & Computat Nanosci, Gaithersburg, MD 20899 USA. Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA. RP Hu, ZB (reprint author), Univ N Texas, Dept Phys, Denton, TX 76203 USA. EM zbhu@unt.edu NR 21 TC 80 Z9 80 U1 5 U2 53 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG 14 PY 2007 VL 23 IS 17 BP 8663 EP 8666 DI 10.1021/la700923r PG 4 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 199YG UT WOS:000248730500004 PM 17658862 ER PT J AU Higgins, SR Hu, XM Fenter, P AF Higgins, Steven R. Hu, Xiaoming Fenter, Paul TI Quantitative lateral force Microscopy study of the dolomite (104)-water interface SO LANGMUIR LA English DT Article ID SELF-ASSEMBLED MONOLAYERS; CHAIN-LENGTH DEPENDENCE; X-RAY REFLECTIVITY; IN-SITU; FRICTIONAL-PROPERTIES; SURFACE; CALCITE; GROWTH; MICA; STIFFNESS AB The friction and lateral stiffness of the contact between an atomic force microscopy (AFM) probe tip and an atomically flat dolomite (104) surface were investigated in contact with two aqueous solutions that were in equilibrium and supersaturated with respect to dolomite, respectively. The two aqueous solutions yielded negligible differences in friction at the native dolomite-water interface. However, the growth of a Ca-rich film from the supersaturated solution, revealed by X-ray reflectivity measurements, altered the probe-dolomite contact region sufficiently to observe distinct friction forces on the native dolomite and the film-covered surface regions. Quantitative friction-load relationships demonstrated three physically distinct load regimes for applied loads up to 200 nN. Similar friction forces were observed on both surfaces below 50 nN load and above 100 nN load. The friction forces on the two surfaces diverged at intermediate loads. Quantitative measurements of dynamic friction forces at low load were consistent with the estimated energy necessary to dehydrate the surface ions, whereas differences in mechanical properties of the Ca-rich film and dolomite surfaces were evidently important above 50 nN load. Attempts to fit the quantitative stiffness-load data using a Hertzian contact mechanical model based on bulk material properties yielded physically unrealistic fitting coefficients, suggesting that the interfacial contact region must be explicitly considered in describing the static and dynamic contact mechanics of this and similar systems. C1 Wright State Univ, Dept Chem, Dayton, OH 45435 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Higgins, SR (reprint author), Wright State Univ, Dept Chem, Dayton, OH 45435 USA. EM steven.higgins@wright.edu OI Fenter, Paul/0000-0002-6672-9748 NR 32 TC 6 Z9 6 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG 14 PY 2007 VL 23 IS 17 BP 8909 EP 8915 DI 10.1021/la700467q PG 7 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 199YG UT WOS:000248730500044 PM 17645356 ER PT J AU Lo, CT Lee, B Rago, NLD Winans, RE Thiyagarajan, P AF Lo, Chieh-Tsung Lee, Byeongdu Rago, Nancy L. Dietz Winans, Randall E. Thiyagarajan, P. TI Strategy for better ordering in diblock copolymer based nanocomposites SO MACROMOLECULAR RAPID COMMUNICATIONS LA English DT Article DE blend; block copolymer; nanocomposites; nanoparticles; SAXS ID BLOCK-COPOLYMER; FILMS; NANOPARTICLES; MIXTURES; SOLVENT; NANOSTRUCTURES; HOMOPOLYMER; COMPOSITES; SIMULATION; DISPERSION AB A simple approach to improve the structural ordering in block copolymer/nanoparticle nanocomposites is presented. It is to blend a small molecular weight homopolymer with the composites, which can uniformly swell the preferred domain where the nanoparticles locate and increase the conformational entropy of the domain. Consequently, the interfaces between the block copolymer domains become smooth that improves the long range order in the nanocomposites. Furthermore, the uniform swelling of the preferred domain by the homopolymer will allow higher loading of nanopaiticles without adversely affecting the long range order. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem Engn, Argonne, IL 60439 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Thiyagarajan, P (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM thiyaga@anl.gov OI Lee, Byeongdu/0000-0003-2514-8805 NR 34 TC 8 Z9 8 U1 0 U2 4 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1022-1336 J9 MACROMOL RAPID COMM JI Macromol. Rapid Commun. PD AUG 14 PY 2007 VL 28 IS 16 BP 1607 EP 1612 DI 10.1002/marc.200700412 PG 6 WC Polymer Science SC Polymer Science GA 204NB UT WOS:000249049800003 ER PT J AU Choi, Y Jiang, JS Pearson, JE Bader, SD Kavich, JJ Freeland, JW Liu, JP AF Choi, Y. Jiang, J. S. Pearson, J. E. Bader, S. D. Kavich, J. J. Freeland, J. W. Liu, J. P. TI Controlled interface profile in Sm-Co/Fe exchange-spring magnets SO APPLIED PHYSICS LETTERS LA English DT Article ID BILAYER THIN-FILMS; PERMANENT-MAGNETS; ENERGY PRODUCT; BEHAVIOR AB In exchange-spring magnets with temperature-induced interfacial intermixing, differences in the extent of diffusion of constituent elements typically lead to local compositional changes. The authors demonstrate that adding an artificially created intermixed layer in Sm-Co/Fe exchange-spring permanent magnets enhances the exchange coupling effectiveness without modifying the local composition of the Sm-Co layer. Element- and depth-resolved magnetization measurements verify that the diffusion extent of Sm and Co is similar across the interface. (C) 2007 American Institute of Physics. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Texas, Dept Phys, Arlington, TX 76019 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Univ Illinois, Dept Phys, Chicago, IL 60607 USA. RP Choi, Y (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM yschoi@anl.gov RI Bader, Samuel/A-2995-2013 NR 20 TC 33 Z9 34 U1 0 U2 16 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 AUG 13 PY 2007 VL 91 IS 7 AR 072509 DI 10.1063/1.2769755 PG 3 WC Physics, Applied SC Physics GA 201XT UT WOS:000248866600068 ER PT J AU Ihlefeld, JF Kumar, A Gopalan, V Schlom, DG Chen, YB Pan, XQ Heeg, T Schubert, J Ke, X Schiffer, P Orenstein, J Martin, LW Chu, YH Ramesh, R AF Ihlefeld, J. F. Kumar, A. Gopalan, V. Schlom, D. G. Chen, Y. B. Pan, X. Q. Heeg, T. Schubert, J. Ke, X. Schiffer, P. Orenstein, J. Martin, L. W. Chu, Y. H. Ramesh, R. TI Adsorption-controlled molecular-beam epitaxial growth of BiFeO3 SO APPLIED PHYSICS LETTERS LA English DT Article ID THIN-FILMS; ENHANCED POLARIZATION; MBE; BI4TI3O12; GAAS AB BiFeO3 thin films have been deposited on (111) SrTiO3 single crystal substrates by reactive molecular-beam epitaxy in an adsorption-controlled growth regime. This is achieved by supplying a bismuth overpressure and utilizing the differential vapor pressures between bismuth oxides and BiFeO3 to control stoichiometry. Four-circle x-ray diffraction reveals phase-pure, untwinned, epitaxial, (0001)-oriented films with rocking curve full width at half maximum values as narrow as 25 arc sec (0.007 degrees). Second harmonic generation polar plots combined with diffraction establish the crystallographic point group of these untwinned epitaxial films to be 3m at room temperature. (C) 2007 American Institute of Physics. C1 Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48019 USA. Res Ctr, Inst Bio & Nano Syst IBNI IT, D-52425 Julich, Germany. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA. RP Ihlefeld, JF (reprint author), Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. EM schlom@ems.psu.edu RI Ying-Hao, Chu/A-4204-2008; Ihlefeld, Jon/A-4260-2008; Ihlefeld, Jon/B-3117-2009; Schiffer, Peter/F-3227-2011; Martin, Lane/H-2409-2011; Kumar, Amit/C-9662-2012; Schlom, Darrell/J-2412-2013; Schubert, Jurgen/K-9543-2013; Orenstein, Joseph/I-3451-2015; OI Ying-Hao, Chu/0000-0002-3435-9084; Martin, Lane/0000-0003-1889-2513; Kumar, Amit/0000-0002-1194-5531; Schlom, Darrell/0000-0003-2493-6113; Schubert, Jurgen/0000-0003-0185-6794; Schiffer, Peter/0000-0002-6430-6549 NR 27 TC 51 Z9 52 U1 4 U2 40 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 AUG 13 PY 2007 VL 91 IS 7 AR 071922 DI 10.1063/1.2767771 PG 3 WC Physics, Applied SC Physics GA 201XT UT WOS:000248866600049 ER PT J AU Jain, M Karan, NK Yoon, J Wang, H Usov, I Katiyar, RS Bhalla, AS Jia, QX AF Jain, M. Karan, N. K. Yoon, J. Wang, H. Usov, I. Katiyar, R. S. Bhalla, A. S. Jia, Q. X. TI High tunability of lead strontium titanate thin films using a conductive LaNiO3 as electrodes SO APPLIED PHYSICS LETTERS LA English DT Article ID SOL-GEL METHOD; DIELECTRIC-PROPERTIES; ELECTRICAL-PROPERTIES; DEPOSITION; MICROSTRUCTURE; DEPENDENCE; CERAMICS; DEVICE; DRAM; (BA AB Highly tunable films of dielectric PbxSr1-xTiO3 (with x=0.3 and 0.4) have been deposited on conductive LaNiO3 coated LaAlO3 substrates using a sol-gel technique. The processing condition was found to greatly influence the microstructure as well as the dielectric and electrical properties of the films. At room temperature, dielectric tunability values as high as 70% and 78.6% at an applied electric field of 223 kV/cm were achieved for the Pb0.3Sr0.7TiO3 and Pb0.4Sr0.6TiO3 films, respectively. (C) 2007 American Institute of Physics. C1 Los Alamos Natl Lab, Mat Phys & Applicat Div, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. Univ Puerto Rico, Dept Phys, Rio Piedras, PR 00931 USA. Texas A&M Univ, Coll Stat, Dept Elect & Comp Engn, College Stn, TX 77843 USA. Penn State Univ, Mat Res Lab, University Pk, PA 16802 USA. RP Jain, M (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. EM mjain@lanl.gov; qxjia@lanl.gov RI Jia, Q. X./C-5194-2008; Wang, Haiyan/P-3550-2014; OI Wang, Haiyan/0000-0002-7397-1209; Jain, Menka/0000-0002-2264-6895 NR 30 TC 15 Z9 15 U1 1 U2 18 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 13 PY 2007 VL 91 IS 7 AR 072908 DI 10.1063/1.2770962 PG 3 WC Physics, Applied SC Physics GA 201XT UT WOS:000248866600081 ER PT J AU Vailionis, A Siemons, W Koster, G AF Vailionis, Arturas Siemons, Wolter Koster, Gertjan TI Strain-induced single-domain growth of epitaxial SrRuO3 layers on SrTiO3: A high-temperature x-ray diffraction study SO APPLIED PHYSICS LETTERS LA English DT Article ID THIN-FILMS AB Temperature dependent structural phase transitions of SrRuO3 thin films epitaxially grown on SrTiO3(001) single crystal substrates have been studied using high-resolution x-ray diffraction. In contrast to bulk SrRuO3, coherently strained epitaxial layers do not display cubic symmetry up to similar to 730 degrees C and remain tetragonal. The cause of this behavior is believed to be the compressive strain in the SrRuO3 layer due to the lattice mismatch with SrTiO3 substrate due to lattice mismatch. The tetragonal symmetry during growth explains the single domain growth on miscut SrTiO3 substrates with step edges running along the [100] or [010] direction. (C) 2007 American Institute of Physics. C1 Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA. Stanford Linear Accelerator Ctr, Adv Mat Lab, Menlo Pk, CA 94025 USA. Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands. Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands. RP Vailionis, A (reprint author), Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA. EM arturas@stanford.edu RI Siemons, Wolter/B-3808-2011; Koster, Gertjan/H-3800-2011; Vailionis, Arturas/C-5202-2008 OI Koster, Gertjan/0000-0001-5478-7329; Vailionis, Arturas/0000-0001-5878-1864 NR 9 TC 19 Z9 19 U1 1 U2 12 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 AUG 13 PY 2007 VL 91 IS 7 AR 071907 DI 10.1063/1.2771087 PG 3 WC Physics, Applied SC Physics GA 201XT UT WOS:000248866600034 ER PT J AU Yang, H Jain, M Suvorova, NA Zhou, H Luo, HM Feldmann, DM Dowden, PC DePaula, RF Foltyn, SR Jia, QX AF Yang, H. Jain, M. Suvorova, N. A. Zhou, H. Luo, H. M. Feldmann, D. M. Dowden, P. C. DePaula, R. F. Foltyn, S. R. Jia, Q. X. TI Temperature-dependent leakage mechanisms of Pt/BiFeO3/SrRuO3 thin film capacitors SO APPLIED PHYSICS LETTERS LA English DT Article ID ELECTRICAL-PROPERTIES; BIFEO3; DEVICE AB Epitaxial c-axis oriented BiFeO3 (BFO) thin films were deposited on conductive SrRuO3 (SRO) on (001) SrTiO3 substrates by pulsed laser deposition. A Pt/BFO/SRO capacitor was constructed by depositing a top Pt electrode. The leakage current density versus. electric field characteristics were investigated from 80 to 350 K. It was found that the leakage mechanisms were a strong function of temperature and voltage polarity. At temperatures between 80 and 150 K, space-charge-limited current was the dominant leakage mechanism for both negative and positive biases. On the other hand, at temperatures between 200 and 350 K the dominant leakage mechanisms were Poole-Frenkle emission and Fowler-Nordheim tunneling for negative and positive biases, respectively. (C) 2007 American Institute of Physics. C1 Los Alamos Natl Lab, Mat Phys & Applicat Div, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Yang, H (reprint author), Los Alamos Natl Lab, Mat Phys & Applicat Div, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. EM hyang@lanl.gov; qxjia@lanl.gov RI Jia, Q. X./C-5194-2008; OI Jain, Menka/0000-0002-2264-6895 NR 24 TC 106 Z9 113 U1 7 U2 67 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 AUG 13 PY 2007 VL 91 IS 7 AR 072911 DI 10.1063/1.2772666 PG 3 WC Physics, Applied SC Physics GA 201XT UT WOS:000248866600084 ER PT J AU Camarero, JA Kimura, RH Woo, YH Shekhtman, A Cantor, J AF Camarero, Julio A. Kimura, Richard H. Woo, Youn-Hi Shekhtman, Alexander Cantor, Jason TI Biosynthesis of a fully functional cyclotide inside living bacterial cells SO CHEMBIOCHEM LA English DT Article DE bioorganic chemistry; biosynthesis; biotechnology; enzyme inhibitors; peptides ID CYCLIC-CYSTINE-KNOT; POLYPEPTIDE KALATA B1; INHIBITOR MCOTI-II; MOMORDICA-COCHINCHINENSIS; MACROCYCLIC PEPTIDES; BIOLOGICAL-ACTIVITY; CHEMICAL-SYNTHESIS; CIRCULAR PROTEINS; TRYPSIN-INHIBITOR; STRUCTURAL MOTIF C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. SUNY Albany, Dept Chem, Albany, NY 12222 USA. RP Camarero, JA (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-231, Livermore, CA 94550 USA. EM camareroI@llnl.gov RI Camarero, Julio/A-9628-2015 NR 32 TC 64 Z9 67 U1 0 U2 11 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 1439-4227 J9 CHEMBIOCHEM JI ChemBioChem PD AUG 13 PY 2007 VL 8 IS 12 BP 1363 EP 1366 DI 10.1002/cbic.200700183 PG 4 WC Biochemistry & Molecular Biology; Chemistry, Medicinal SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy GA 201SA UT WOS:000248851700005 PM 17590879 ER PT J AU Carlson, CN Kuehl, CJ Ogallo, L Shultz, DA Thompson, JD Kirk, ML Martin, RL John, KD Morris, DE AF Carlson, Christin N. Kuehl, Christopher J. Ogallo, Linda Shultz, David A. Thompson, J. D. Kirk, Martin L. Martin, Richard L. John, Kevin D. Morris, David E. TI Influence of ligand geometry in bimetallic ytterbocene complexes of bridging bis(bipyridyl) Ligands SO ORGANOMETALLICS LA English DT Article ID TRANSITION-METAL COMPLEXES; 5 REDOX STAGES; CHARGE-TRANSFER; GROUND-STATE; ANTIFERROMAGNETIC EXCHANGE; OPTICAL SPECTROSCOPY; DELTA-E-1/2 VALUES; UV/VISIBLE/NEAR-IR; MIXED-VALENCY; BIRADICALS AB Two new bimetallic complexes, [Cp*Yb-2](2)(mu-1,3-(2,2'-bipyridyl)-5-(BU)-B-t-C6H3) (1) and [Cp*Yb-2](2)(mu-1,4-(2,2'-bipyridyl)-C6H4) (2), and their corresponding two-electron oxidation products [1](2+) and [2](2+) have been synthesized with the aim of determining the impact of the bridging ligand geometry on the electronic and magnetic properties of these materials. Electrochemistry, optical spectroscopy, and bulk susceptibility measurements all support a ground-state electronic configuration of the type [(f)(13)-(pi(a)*)(1)-(pi(b)*)(1)-(f)(13)]. Density functional theory calculations on the uncomplexed bridging ligands as doubly reduced species also indicate that the diradical electronic configuration is the lowest lying for both meta- and para-bis(bipyridyl) systems. The electrochemical and optical spectroscopic data indicate that the electronic coupling between the metal centers mediated by the diradical bridges is weak, as evidenced by the small separation of the metal-based redox couples and the similarity of the f-f transitions of the associated dicationic complexes ([1](2+) and [2](2+)) relative to those of the monometallic [CP*Yb-2(bpy)](+) analogue. The magnetic susceptibility data show no evidence for exchange coupling between the paramagnetic metal centers in the neutral complexes, but do indicate weak exchange coupling between Yb-III and ligand radical spins on each of the effectively independent halves of the bimetallic complexes. These findings are in contrast to those reported recently for Co-III/II dioxolene bimetallic complexes bridged by these same bis(bipyridyl) ligands. The difference is attributed in part to the dominant singlet diradical character of the bridging ligands in the ytterbocene complexes. These experimental and theoretical results are consistent with expectations for organic diradical spin orientations for meta versus para substituents across a phenylene linker, but this effect does not induce significant longer-range superexchange or electronic interactions between the metal centers in these systems. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. N Carolina State Univ, Raleigh, NC 27695 USA. Univ New Mexico, Dept Chem & Biol Chem, Albuquerque, NM 87131 USA. RP John, KD (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM kjohn@lanl.gov; demorris@lanl.gov RI Morris, David/A-8577-2012; OI John, Kevin/0000-0002-6181-9330 NR 48 TC 7 Z9 7 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0276-7333 EI 1520-6041 J9 ORGANOMETALLICS JI Organometallics PD AUG 13 PY 2007 VL 26 IS 17 BP 4234 EP 4242 DI 10.1021/om061157o PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA 199XV UT WOS:000248729400023 ER PT J AU Komesu, T Waddill, GD Yu, SW Tobin, JG AF Komesu, Takashi Waddill, G. D. Yu, S.-W. Tobin, J. G. TI Spin dependent electron transmission through ferromagnetic thin films SO PHYSICS LETTERS A LA English DT Article ID MEAN FREE-PATH; PHOTOEMISSION SPECTROSCOPY; FE FILMS; AG(100); CO; EXCITATIONS; TRANSITION; SCATTERING; METALS AB Spin-polarized electron spectroscopies are used to probe the nature of magnetism in surfaces and thin films. Strong inelastic scattering of the electron from particle-hole and collective excitations results in short mean free paths that can be spin dependent. A quantitative understanding of the spin dependence of the inelastic mean free path is critical to the interpretation of results from spin-polarized electron spectroscopies such as spin-polarized low energy electron diffraction, spin-polarized electron energy loss spectroscopy, and spin-polarized photoemission. Substantial spin asymmetry of the photocurrent has been observed and interpreted as being due to the spin-dependence of the photoelectron inelastic mean free path. We have examined such spin dependent behavior of electrons transmitted though magnetic films with higher kinetic energy in order to reduce complications due to spin-flip scattering, which are more prevalent at lower kinetic energy. We present clear evidence of a spin filter effect for the Ag 3d photoelectrons through a ferromagnetic Fe film at 720 eV (kinetic energy). (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Missouri, Dept Phys, Rolla, MO 65401 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Waddill, GD (reprint author), Univ Missouri, Dept Phys, Rolla, MO 65401 USA. EM waddill@umr.edu RI Tobin, James/O-6953-2015 NR 22 TC 2 Z9 2 U1 5 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 13 PY 2007 VL 368 IS 1-2 BP 129 EP 133 DI 10.1016/j.physleta.2007.03.070 PG 5 WC Physics, Multidisciplinary SC Physics GA 203KB UT WOS:000248972400023 ER PT J AU Muhrer, G Hartl, MA Daemen, LL Ryu, J AF Muhrer, G. Hartl, M. A. Daemen, L. L. Ryu, J. TI Benchmark test of the effectiveness of a nitrogen cooled beryllium reflector-filter SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article DE spallation source; moderators; beryllium filter; MCNPX ID SCATTERING AB We present a comparison between the calculated and the measured effectiveness of a nitrogen cooled beryllium reflector-filter in increasing the cold flux of a polyethylene moderator at the same temperature. We also discuss the impact of the quality of beryllium oil the results. (C) 2007 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. MIT, Cambridge, MA 02139 USA. RP Muhrer, G (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM muhrer@lanl.gov RI Lujan Center, LANL/G-4896-2012; Hartl, Monika/F-3094-2014; Hartl, Monika/N-4586-2016 OI Hartl, Monika/0000-0002-6601-7273; Hartl, Monika/0000-0002-6601-7273 NR 11 TC 5 Z9 5 U1 1 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 AUG 11 PY 2007 VL 578 IS 3 BP 463 EP 469 DI 10.1016/j.nima.2007.06.004 PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA 206BG UT WOS:000249158300002 ER PT J AU Li, ZZ Cui, XL Zheng, JS Wang, QF Lin, YH AF Li, Zhizhou Cui, Xiaoli Zheng, Junsheng Wang, Qingfei Lin, Yuehe TI Effects of microstructure of carbon nanofibers for amperometric detection of hydrogen peroxide SO ANALYTICA CHIMICA ACTA LA English DT Article DE carbon nanofibers; hydrogen peroxide oxidation; electrocatalytic activity; hydrogen peroxide sensors ID DIRECT ELECTRON-TRANSFER; GLUCOSE BIOSENSOR; ELECTROCATALYTIC PROPERTIES; HORSERADISH-PEROXIDASE; MNO2 NANOPARTICLES; OXYGEN REDUCTION; PASTE ELECTRODE; NANOTUBE; GRAPHITE; OXIDASE AB Carbon nanofibers (CNFs) with three microstructures, including platelet-carbon nanofibers (PCNFs), fish-bone-carbon nanofibers (FCNFs), and tube-carbon nanofibers (TCNFs), were synthesized, characterized, and evaluated for electrochemical sensing of hydrogen peroxide. The CNFs studied here show microstructures with various stacked morphologies. The sizes and graphite-layer ordering of the CNFs can be well controlled. Glassy carbon (GC) electrodes modified by CNFs were fabricated and compared for amperometric detection of hydrogen peroxide. Sensors based on PCNFs/GC, FCNFs/GC, and TCNFs/GC were used in the amperometric detection of H(2)O(2) in solution by applying a potential of +0.65 V versus Ag/AgCl at the working electrode. The highest electrocatalytic performance was observed for PCNFs/GC among the three types of hydrogen peroxide sensors. The amperometric response of PCNFs/GC retained over 90% of the initial current of the first day up to 21 days. The linear range is from 1.80 x 10(-4) to 2.62 x 10(-3) M with a correlation coefficient larger than 0.999 and with a detection limit of 4.0 mu M H(2)O(2) (S/N = 3). The relative standard deviation for detecting 1.80 x 10(-4) M H(2)O(2) (N = 8) is 2.1 % with an average response of 0.64 mu A. The significant diversity of electrocatalytic activity of the CNFs toward the oxidation of hydrogen peroxide may result from the difference of morphologies, textural properties, and crystalline structures. (C) 2007 Elsevier B.V. All rights reserved. C1 Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China. Pacific NW Natl Lab, Richland, WA 99352 USA. Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhunag 050016, Peoples R China. E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China. RP Cui, XL (reprint author), Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China. EM xiaolicui@fudan.edu.cn; yuehe.lin@pnl.gov RI Lin, Yuehe/D-9762-2011 OI Lin, Yuehe/0000-0003-3791-7587 NR 50 TC 38 Z9 40 U1 0 U2 24 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 AUG 10 PY 2007 VL 597 IS 2 BP 238 EP 244 DI 10.1016/j.aca.2007.06.046 PG 7 WC Chemistry, Analytical SC Chemistry GA 204YY UT WOS:000249081100008 PM 17683735 ER PT J AU Johnson, BR Collins, J Abroe, ME Ade, PAR Bock, J Borrill, J Boscaleri, A de Bernardis, P Hanany, S Jaffe, AH Jones, T Lee, AT Levinson, L Matsumura, T Rabii, B Renbarger, T Richards, PL Smoot, GF Stompor, R Tran, HT Winant, CD Wu, JHP Zuntz, J AF Johnson, B. R. Collins, J. Abroe, M. E. Ade, P. A. R. Bock, J. Borrill, J. Boscaleri, A. de Bernardis, P. Hanany, S. Jaffe, A. H. Jones, T. Lee, A. T. Levinson, L. Matsumura, T. Rabii, B. Renbarger, T. Richards, P. L. Smoot, G. F. Stompor, R. Tran, H. T. Winant, C. D. Wu, J. H. P. Zuntz, J. TI Maxipol: Cosmic microwave background polarimetry using a rotating half-wave plate SO ASTROPHYSICAL JOURNAL LA English DT Article DE polarization ID PROBE WMAP OBSERVATIONS; GALACTIC DUST EMISSION; ANISOTROPY-PROBE; ANGULAR SCALES; 2003 FLIGHT; POLARIZATION; MAXIMA-1; SUBMILLIMETER; RADIATION; INSTRUMENT AB We discuss MAXIPOL, a bolometric balloon-borne experiment designed to measure the E-mode polarization of the cosmic microwave background radiation (CMB). MAXIPOL is the first bolometric CMB experiment to observe the sky using rapid polarization modulation. To build MAXIPOL, the CMB temperature anisotropy experiment MAXIMA was retrofitted with a rotating half-wave plate and a stationary analyzer. We describe the instrument, the observations, the calibration, and the reduction of data collected with 12 polarimeters operating at 140 GHz and with a FWHM beam size of 10'. We present maps of the Q and U Stokes parameters of an 8 deg(2) region of the sky near the star beta UMi. The power spectra computed from these maps give weak evidence for an EE signal. The maximum likelihood amplitude of l(l +/- 1) C-l(EE)/2 pi is 55(-45)(+51) mu K-2 (68%), and the likelihood function is asymmetric and skewed positive such that with a uniform prior the probability that the amplitude is positive is 96%. This result is consistent with the expected concordance Lambda CDM amplitude of 14 mu K-2. The maximum likelihood amplitudes for l(l + 1) C-l(BB)/2 pi and l(l + 1) C-l(EB)/2 pi are -31(-19)(+31) and 18(-34)(+27) mu K-2 ( 68%), respectively, which are consistent with zero. All of the results are for one bin in the range 151 <= l <= 693. Tests revealed no residual systematic errors in the time or map domain. A comprehensive discussion of the analysis of the data is presented in a companion paper. C1 Univ Oxford, Oxford OX1 3RH, England. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3YB, Wales. Jet Propuls Lab, Pasadena, CA 91109 USA. Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. CNR, IFAC, Florence, Italy. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Imperial Coll, Blackett Lab, Astrophys Grp, London SW7 2AZ, England. Nat Lab, Div Phys, Berkeley, CA 94720 USA. Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. Univ Paris 07, Lab AstroParticle Cosmol, Paris, France. Natl Taiwan Univ, Ctr Theoret Sci, Inst Astrophys, Dept Phys, Taipei 10617, Taiwan. RP Johnson, BR (reprint author), Univ Oxford, S Parks Rd, Oxford OX1 3RH, England. RI Jaffe, Andrew/D-3526-2009; OI de Bernardis, Paolo/0000-0001-6547-6446; WU, JIUN-HUEI/0000-0001-9608-7662 NR 38 TC 38 Z9 38 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X EI 1538-4357 J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 2007 VL 665 IS 1 BP 42 EP 54 DI 10.1086/518105 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DF UT WOS:000248675700004 ER PT J AU Wu, JHP Zuntz, J Abroe, ME Ade, PAR Bock, J Borrill, J Collins, J Hanany, S Jaffe, AH Johnson, BR Jones, T Lee, AT Matsumura, T Rabii, B Renbarger, T Richards, PL Smoot, GF Stompor, R Tran, HT Winant, CD AF Wu, J. H. P. Zuntz, J. Abroe, M. E. Ade, P. A. R. Bock, J. Borrill, J. Collins, J. Hanany, S. Jaffe, A. H. Johnson, B. R. Jones, T. Lee, A. T. Matsumura, T. Rabii, B. Renbarger, T. Richards, P. L. Smoot, G. F. Stompor, R. Tran, H. T. Winant, C. D. TI Maxipol: Data analysis and results SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmic microwave background; cosmology : observations; methods : data analysis; polarization ID MICROWAVE BACKGROUND ANISOTROPY; ANGULAR SCALES; POWER SPECTRUM; POLARIZATION; MAXIMA-1; BOOMERANG; PROBE; WMAP AB We present results from and the analysis of data from MAXIPOL, a balloon- borne experiment designed to measure the polarization in the cosmic microwave background (CMB). MAXIPOL is the first CMB experiment to obtain results using a rotating half-wave plate as a rapid polarization modulator. We report results from observations of a sky area of 8 deg(2) with 100 resolution, providing information up to l similar to 700. We use a maximum likelihood method to estimate maps of the Q and U Stokes parameters from the demodulated time streams, and then both Bayesian and frequentist approaches to compute the EE, EB, and BB power spectra. Detailed formalisms of the analyses are given. We give results for the amplitude of the power spectra assuming different shape functions within the l bins, with and without a prior C-l(EB) = C-l(BB) = 0, and with and without inclusion of calibration uncertainty. We show results from systematic tests including differencing of maps, analyzing sky areas of different sizes, assessing the influence of leakage from temperature to polarization, and quantifying the Gaussianity of the maps. We find no evidence for systematic errors. The Bayesian analysis gives weak evidence for an EE signal. The EE power is 55(-45)(+51) mu K-2 at the 68% confidence level for l = 151-693. Its likelihood function is asymmetric and skewed positive such that with a uniform prior the probability of a positive EE power is 96%. The powers of EB and BB signals at the 68% confidence level are 18(-34)(+27) and 31(-19)(+31) mu K-2, respectively, and thus consistent with zero. The upper limit of the BB-mode at the 95% confidence level is 9.5 mu K. Results from the frequentist approach are in agreement within statistical errors. These results are consistent with the current concordance Lambda CDM model. C1 Natl Taiwan Univ, Inst Astrophys, Ctr Theoret Sci, Dept Phys, Taipei 10617, Taiwan. Imperial Coll, Blackett Lab, Astrophys Grp, London SW7 2AZ, England. Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA. Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3Y, S Glam, Wales. Jet Propuls Lab, Pasadena, CA 91109 USA. Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Oxford, Oxford OX1 3RH, England. Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA. Univ Paris 07, Lab AstroParticule Cosmol, Paris, France. RP Wu, JHP (reprint author), Natl Taiwan Univ, Inst Astrophys, Ctr Theoret Sci, Dept Phys, Taipei 10617, Taiwan. RI Jaffe, Andrew/D-3526-2009; OI WU, JIUN-HUEI/0000-0001-9608-7662 NR 30 TC 44 Z9 44 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 AUG 10 PY 2007 VL 665 IS 1 BP 55 EP 66 DI 10.1086/518112 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DF UT WOS:000248675700005 ER PT J AU Markowitz, A Takahashi, T Watanabe, S Nakazawa, K Fukazawa, Y Kokubun, M Makishima, K Awaki, H Bamba, A Isobe, N Kataoka, J Madejski, G Mushotzky, R Okajima, T Ptak, A Reeves, JN Ueda, Y Yamasaki, T Yaqoob, T AF Markowitz, A. Takahashi, T. Watanabe, S. Nakazawa, K. Fukazawa, Y. Kokubun, M. Makishima, K. Awaki, H. Bamba, A. Isobe, N. Kataoka, J. Madejski, G. Mushotzky, R. Okajima, T. Ptak, A. Reeves, J. N. Ueda, Y. Yamasaki, T. Yaqoob, T. TI The Suzaku observation of the nucleus of the radio-loud active galaxy Centaurus A: Constraints on abundances of the accreting material SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies : active; galaxies : individual (NGC 5128); X-rays : galaxies ID X-RAY-EMISSION; ADVECTION-DOMINATED ACCRETION; XMM-NEWTON OBSERVATIONS; NGC 5128; METALLICITY DISTRIBUTION; BOARD SUZAKU; HALO STARS; BLACK-HOLE; FR-I; CHANDRA AB A Suzaku observation of the nucleus of the radio-loud AGN Centaurus A in 2005 has yielded a broadband spectrum spanning 0.3-250 keV. The net exposure times after screening were 70 ks per X-ray Imaging Spectrometer (XIS) camera, 60.8 ks for the Hard X- ray Detector (HXD) PIN, and 17.1 ks for the HXD GSO. The hard X- rays are fit by two power laws of the same slope, absorbed by columns of 1.5 and 7 x 10(23) cm(-2), respectively. The spectrum is consistent with previous suggestions that the power-law components are X- ray emission from the subparsec VLBI jet and from Bondi accretion at the core, but it is also consistent with a partial-covering interpretation. The soft band is dominated by thermal emission from the diffuse plasma and is fit well by a two-temperature VAPEC model, plus a third power-law component to account for scattered nuclear emission, jet emission, and emission from X- ray binaries and other point sources. Narrow fluorescent emission lines from Fe, Si, S, Ar, Ca, and Ni are detected. The Fe K proportional to line width yields a 200 lt-day lower limit on the distance from the black hole to the line-emitting gas. Fe, Ca, and S K-shell absorption edges are detected. Elemental abundances are constrained via absorption edge depths and strengths of the fluorescent and diffuse plasma emission lines. The high metallicity ([Fe/H] = +0.1) of the circumnuclear material suggests that it could not have originated in the relatively metal-poor outer halo unless enrichment by local star formation has occurred. Relative abundances are consistent with enrichment from Type II and Ia supernovae. C1 NASA, Goddard Space Flight Ctr, X Ray Astrophys Lab, Greenbelt, MD 20771 USA. Inst Space & Astronaut Sci, JAXA, Sagamihara, Kanagawa 229, Japan. Hiroshima Univ, Dept Phys, Higashihiroshima 739, Japan. Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Tokyo, Japan. Inst Phys & Chem Res, Wako, Saitama 35101, Japan. Ehime Univ, Fac Sci, Dept Phys, Matsuyama, Ehime 7908577, Japan. Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Kyoto Univ, Dept Astron, Kyoto 606, Japan. RP Markowitz, A (reprint author), NASA, Goddard Space Flight Ctr, X Ray Astrophys Lab, Code 662, Greenbelt, MD 20771 USA. EM agm@milkyway.gsfc.nasa.gov RI Ptak, Andrew/D-3574-2012; XRAY, SUZAKU/A-1808-2009 NR 65 TC 41 Z9 41 U1 0 U2 3 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 10 PY 2007 VL 665 IS 1 BP 209 EP 224 DI 10.1086/519271 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DF UT WOS:000248675700015 ER PT J AU Faber, SM Willmer, CNA Wolf, C Koo, DC Weiner, BJ Newman, JA Im, M Coil, AL Conroy, C Cooper, MC Davis, M Finkbeiner, DP Gerke, BF Gebhardt, K Groth, EJ Guhathakurta, P Harker, J Kaiser, N Kassin, S Kleinheinrich, M Konidaris, NP Kron, RG Lin, L Luppino, G Madgwick, DS Meisenheimer, K Noeske, KG Phillips, AC Sarajedini, VL Schiavon, RP Simard, L Szalay, AS Vogt, NP Yan, R AF Faber, S. M. Willmer, C. N. A. Wolf, C. Koo, D. C. Weiner, B. J. Newman, J. A. Im, M. Coil, A. L. Conroy, C. Cooper, M. C. Davis, M. Finkbeiner, D. P. Gerke, B. F. Gebhardt, K. Groth, E. J. Guhathakurta, P. Harker, J. Kaiser, N. Kassin, S. Kleinheinrich, M. Konidaris, N. P. Kron, R. G. Lin, L. Luppino, G. Madgwick, D. S. Meisenheimer, K. Noeske, K. G. Phillips, A. C. Sarajedini, V. L. Schiavon, R. P. Simard, L. Szalay, A. S. Vogt, N. P. Yan, R. TI Galaxy luminosity functions to z similar to 1 from deep2 and combo-17: Implications for red galaxy formation SO ASTROPHYSICAL JOURNAL LA English DT Review DE galaxies : distances and redshifts; galaxies : evolution; galaxies : luminosity function, mass function ID HUBBLE-SPACE-TELESCOPE; GROTH STRIP SURVEY; DIGITAL SKY SURVEY; STAR-FORMATION HISTORIES; SUPERMASSIVE BLACK-HOLES; COLOR-MAGNITUDE RELATION; FIELD ELLIPTIC GALAXIES; FRANCE REDSHIFT SURVEY; SPECTRAL-ENERGY-DISTRIBUTIONS; STELLAR POPULATION HISTORIES AB The DEEP2 and COMBO-17 surveys are compared to study luminosity functions of red and blue galaxies to z similar to 1. The two surveys have different methods and sensitivities, but nevertheless results agree. After z similar to 1, M-B* B has dimmed by 1.2-1.3 mag for all colors of galaxies, phi* for blue galaxies has hardly changed, and phi* for red galaxies has at least doubled (our formal value is similar to 0.5 dex). Luminosity density j(B) has fallen by 0.6 dex for blue galaxies but has remained nearly constant for red galaxies. These results imply that the number and total stellar mass of blue galaxies have been substantially constant since z similar to 1, whereas those of red galaxies (near L*) have been significantly rising. To explain the new red galaxies, a "mixed" scenario is proposed in which star formation in blue cloud galaxies is quenched, causing them to migrate to the red sequence, where they merge further in a small number of stellar mergers. This mixed scenario matches the local boxy-disky transition for nearby ellipticals, as well as red sequence stellar population scaling laws such as the color-magnitude and Mg-sigma relations (which are explained as fossil relics from blue progenitors). Blue galaxies enter the red sequence via different quenching modes, each of which peaks at a different characteristic mass and time. The red sequence therefore likely builds up in different ways at different times and masses, and the concept of a single process that is "downsizing" (or upsizing) probably does not apply. Our claim in this paper of a rise in the number of red galaxies applies to galaxies near L*. Accurate counts of brighter galaxies on the steep part of the Schechter function require more accurate photometry than is currently available. C1 Univ Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Observ Natl, Rio De Janeiro, Brazil. Univ Oxford, Dept Phys, Oxford, England. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Seoul Natl Univ, Dept Phys & Astron, FPRD, Seoul, South Korea. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Texas, Dept Astron, Austin, TX 78712 USA. Princeton Univ, Dept Phys, Princeton, NJ 08544 USA. Astron Inst, Honolulu, HI 96822 USA. Max Planck Inst Astron, D-69117 Heidelberg, Germany. Univ Chicago, Dept Astron, Chicago, IL 60637 USA. Natl Taiwan Univ, Dept Phys, Taipei 106, Taiwan. Univ Florida, Dept Astron, Gainesville, FL 32611 USA. Univ Virginia, Dept Astron, Charlottesville, VA USA. Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC, Canada. Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA. RP Faber, SM (reprint author), Univ Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064 USA. EM faber@ucolick.org; cnaw@as.arizona.edu; cwolf@astro.ox.ac.uk; koo@ucolick.org; bjw@as.arizona.edu; janewman@lb1.gov; mim@astro.snu.ac.kr; acoil@as.arizona.edu; cconroy@astron.berkeley.edu; cooper@astron.berkeley.edu; mdavis@astro.berkeley.edu; dfink@astro.princeton.edu; bgerke@astro.berkeley.edu; gebhardt@hoku.as.utexas.edu; groth@pupgg.princeton.edu; raja@ucolick.org; jharker@ucolick.org; kaiser@ifa.hawaii.edu; kassin@ucolick.org; npk@ucolick.org; rich@oddjob.uchicago.edu; lihwai@ucolick.org; ger@ifa.hawaii.edu; meise@mpia.de; kai@ucolick.org; phillips@ucolick.org; vicki@astro.ufl.edu; ripisc@virginia.edu; luc.simard@nrc.ca; szalay@jhu.edu; nicole@nmsu.edu; renbin@astro.berkeley.edu RI Im, Myungshin/B-3436-2013 OI Im, Myungshin/0000-0002-8537-6714 NR 212 TC 620 Z9 622 U1 3 U2 15 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 AUG 10 PY 2007 VL 665 IS 1 BP 265 EP 294 DI 10.1086/519294 PN 1 PG 30 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DF UT WOS:000248675700021 ER PT J AU Krumholz, MR Klein, RI Mckee, CF AF Krumholz, Mark R. Klein, Richard I. Mckee, Christopher F. TI Molecular line emission from massive protostellar disks: Predictions for ALMA and EVLA SO ASTROPHYSICAL JOURNAL LA English DT Article DE accretion, accretion disks; ISM : clouds; methods : numerical; radiative transfer; stars : formation ID INTERSTELLAR DUST GRAINS; STAR-FORMATION; TURBULENT CORES; FRAGMENTATION; SUBMILLIMETER; ACCRETION; CLOUD; MILLIMETER; SCATTERING; DISCS AB We compute the molecular line emission of massive protostellar disks by solving the equation of radiative transfer through the cores and disks produced by the recent radiation-hydrodynamic simulations of Krumholz, Klein,& McKee. We find that in several representative lines the disks show brightness temperatures of hundreds of kelvins over velocity channels similar to 10 km s(-1) wide, extending over regions hundreds of AU in size. We process the computed intensities to model the performance of next-generation radio and submillimeter telescopes. Our calculations show that observations using facilities such as the Expanded Very Large Array (EVLA) and Atacama Large Millimeter Array (ALMA) should be able to detect massive protostellar disks and measure their rotation curves, at least in the nearest massive star-forming regions. They should also detect significant substructure and nonaxisymmetry in the disks, and in some cases may be able to detect star-disk velocity offsets of a few km s(-1), both of which are the result of strong gravitational instability in massive disks. We use our simulations to explore the strengths and weaknesses of different observational techniques, and we also discuss how observations of massive protostellar disks may be used to distinguish between alternative models of massive star formation. C1 Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Krumholz, MR (reprint author), Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA. EM krumholz@astro.princeton.edu; klein@astron.berkeley.edu; cmckee@astron.berkeley.edu OI Krumholz, Mark/0000-0003-3893-854X NR 38 TC 38 Z9 38 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 AUG 10 PY 2007 VL 665 IS 1 BP 478 EP 491 DI 10.1086/519305 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DF UT WOS:000248675700036 ER PT J AU Fisker, JL Tan, WP Gorres, J Wiescher, M Cooper, RL AF Fisker, Jacob Lund Tan, Wanpeng Goerres, Joachim Wiescher, Michael Cooper, Randall L. TI The O-15(alpha, gamma)Ne-19 reaction rate and the stability of thermonuclear burning on accreting neutron stars SO ASTROPHYSICAL JOURNAL LA English DT Article DE nuclear reactions, nucleosynthesis, abundances; stars : neutron; X-rays : bursts ID X-RAY-BURSTS; EVOLUTION; FLASHES; PHYSICS AB Neutron stars in close binary star systems often accrete matter from their companion stars. Thermonuclear ignition of the accreted material in the atmosphere of the neutron star leads to a thermonuclear explosion, which is observed as an X-ray burst occurring periodically between hours and days depending on the accretion rate. The ignition conditions are characterized by a sensitive interplay between the accretion rate of the fuel supply and its depletion rate by nuclear burning in the hot CNO cycle and the rp-process. For accretion rates close to stable burning the burst ignition therefore depends critically on the hot CNO breakout reaction O-15(alpha, gamma) Ne-19 that regulates the flow between the hot CNO cycle and the rapid proton capture process. Until recently, the O-15( alpha, gamma) 19Ne reaction rate was not known experimentally and the theoretical estimates carried significant uncertainties. In this paper we perform a parameter study of the uncertainty of this reaction rate and determine the astrophysical consequences of the first measurement of this reaction rate. Our results corroborate earlier predictions and show that theoretically burning remains unstable up to accretion rates near the Eddington limit, in contrast to astronomical observations. C1 Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Kohn Hall, Santa Barbara, CA 93106 USA. Univ Notre Dame, Dept Phys, Joint Inst Nucl Astrophys, Notre Dame, IN 46556 USA. Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Fisker, JL (reprint author), Lawrence Livermore Natl Lab, PO Box 808,L-414, Livermore, CA 94551 USA. EM jfisker@nd.edu; wtan@nd.edu; jgoerres@nd.edu; mwiesche@nd.edu; rcooper@cfa.harvard.edu RI Tan, Wanpeng/A-4687-2008 OI Tan, Wanpeng/0000-0002-5930-1823 NR 43 TC 25 Z9 25 U1 0 U2 5 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 AUG 10 PY 2007 VL 665 IS 1 BP 637 EP 641 DI 10.1086/519517 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DF UT WOS:000248675700046 ER PT J AU Chambers, DH AF Chambers, D. H. TI Target characterization using time-reversal symmetry of wave propagation SO INTERNATIONAL JOURNAL OF MODERN PHYSICS B LA English DT Review DE time-reversal; target characterization; decomposition ID UNDERWATER ACOUSTIC COMMUNICATION; HIGHLY REVERBERANT ENVIRONMENT; PHASE-CONJUGATION; RANDOM-MEDIA; ELECTROMAGNETIC SCATTERING; MULTIPLE-SCATTERING; SPHERICAL SCATTERER; SMALL INCLUSIONS; FIXED FREQUENCY; SHALLOW-WATER AB Over the last 15 years, there has been rapid growth in applications of time-reversal symmetry of wave propagation to enhance communications and imaging through highly scattering media. These techniques exploit both temporal and spatial reciprocity to mitigate signal distortion created from the large number of independent propagation paths between a transmitter and receiver. The time-reversal process is often described by the time-reversal operator (TRO), or equivalently by the multistatic response matrix (MRM), defined by the transmit and receive system. A singular value decomposition of this operator (or MRM) is the starting point for many of the time-reversal imaging techniques. In addition to imaging, this decomposition can also be used to extract information about objects embedded within the propagation medium, i.e., target characterization. In this paper, we review the development of target characterization in time-reversal, with an emphasis on extracting information from small targets. We will analyze the MRM for both acoustic and electromagnetic scattering and show how the symmetry of the target is reflected in the properties of the singular value spectrum. Finally, we discuss several open problems and potential applications. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Chambers, DH (reprint author), Lawrence Livermore Natl Lab, POB 808,L-154, Livermore, CA 94551 USA. EM chambers2@llnl.gov NR 88 TC 10 Z9 10 U1 0 U2 6 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 AUG 10 PY 2007 VL 21 IS 20 BP 3511 EP 3555 DI 10.1142/S0217979207037521 PG 45 WC Physics, Applied; Physics, Condensed Matter; Physics, Mathematical SC Physics GA 246HB UT WOS:000251997000001 ER PT J AU Maresso, AW Wu, RY Kern, JW Zhang, RG Janik, D Missiakas, DM Duban, ME Joachimiak, A Schneewind, O AF Maresso, Anthony W. Wu, Ruiying Kern, Justin W. Zhang, Rongguang Janik, Dorota Missiakas, Dominique M. Duban, Mark-Eugene Joachimiak, Andrzej Schneewind, Olaf TI Activation of inhibitors by sortase triggers irreversible modification of the active site SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID STAPHYLOCOCCUS-AUREUS SORTASE; PROTEIN ANCHORING TRANSPEPTIDASE; GRAM-POSITIVE BACTERIA; SURFACE-PROTEINS; CELL-WALL; MANNICH-BASES; BACILLUS-ANTHRACIS; A INHIBITORS; DRUG-LIKE; SRTA AB Sortases anchor surface proteins to the cell wall of Gram-positive pathogens through recognition of specific motif sequences. Loss of sortase leads to large reductions in virulence, which identifies sortase as a target for the development of antibacterials. By screening 135,625 small molecules for inhibition, we report here that aryl (beta-amino) ethyl ketones inhibit sortase enzymes from staphylococci and bacilli. Inhibition of sortases occurs through an irreversible, covalent modification of their active site cysteine. Sortases specifically activate this class of molecules via beta-elimination, generating a reactive olefin intermediate that covalently modifies the cysteine thiol. Analysis of the three-dimensional structure of Bacillusanthracis sortase B with and without inhibit or provides insights into the mechanism of inhibition and reveals binding pockets can be exploited for drug discovery. C1 Univ Chicago, Dept Microbiol, Chicago, IL 60637 USA. Argonne Natl Lab, Biosci Div, Midwest Ctr Struct Genom & Struct Biol Ctr, Argonne, IL 60439 USA. Chicago State Univ, Dept Chem & Phys, Lab Design Bioact Mol, Chicago, IL 60628 USA. RP Schneewind, O (reprint author), Univ Chicago, Dept Microbiol, 920 E 58th St, Chicago, IL 60637 USA. EM oschnee@bsd.uchicago.edu RI Duban, Mark-Eugene/K-2762-2012 FU NIAID NIH HHS [AI057153, 1-U54-AI-057153, AI38897, R01 AI038897, U54 AI057153]; NIGMS NIH HHS [GM074942, GM08043, GM62414, P50 GM062414, P50 GM062414-02, S06 GM008043, U54 GM074942, U54 GM074942-04S2] NR 55 TC 49 Z9 53 U1 1 U2 14 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD AUG 10 PY 2007 VL 282 IS 32 BP 23129 EP 23139 DI 10.1074/jbc.M701857200 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 197ST UT WOS:000248577500015 PM 17545669 ER PT J AU Fisher, A White, D Rodrigue, G AF Fisher, A. White, D. Rodrigue, G. TI An efficient vector finite element method for nonlinear electromagnetic modeling SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE Maxwell's equations; finite element method; simulations; nonlinear optics; photonics ID DEPENDENT MAXWELL EQUATIONS; TIME; DISPERSION; GRIDS; FORMS AB We have developed a mixed Vector Finite Element Method (VFEM) for Maxwell's equations with a nonlinear polarization term. The method allows for discretization of complicated geometries with arbitrary order representations of the B and E fields. In this paper we will describe the method and a series of optimizations that significantly reduce the computational cost. Additionally, a series of test simulations will be presented to validate the method. Finally, a nonlinear waveguide mode mixing example is presented and discussed. (c) 2007 Elsevier Inc. All rights reserved. C1 [Fisher, A.; Rodrigue, G.] Univ Calif Davis, Davis, CA 95616 USA. [White, D.] Lawrence Livermore Natl Lab, Livermore, CA USA. RP Fisher, A (reprint author), Univ Calif Davis, Davis, CA 95616 USA. EM fisher47@llnl.gov; white37@llnl.gov; ghrodrigue@ucdavis.edu NR 31 TC 6 Z9 6 U1 0 U2 2 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD AUG 10 PY 2007 VL 225 IS 2 BP 1331 EP 1346 DI 10.1016/j.jcp.2007.01.031 PG 16 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 292ZL UT WOS:000255304500009 ER PT J AU Evans, TM Densmore, JD AF Evans, T. M. Densmore, J. D. TI Methods for coupling radiation, ion, and electron energies in grey Implicit Monte Carlo SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE thermal radiation transport; Implicit Monte Carlo; three-temperature model ID TIME INTEGRATION; TRANSPORT AB We present three methods for extending the Implicit Monte Carlo (IMC) method to treat the time-evolution of coupled radiation, electron, and ion energies. The first method splits the ion and electron coupling and conduction from the standard IMC radiation-transport process. The second method recasts the IMC equations such that part of the coupling is treated during the Monte Carlo calculation. The third method treats all of the coupling and conduction in the Monte Carlo simulation. We apply modified equation analysis (MEA) to simplified forms of each method that neglects the errors in the conduction terms. Through MEA we show that the third method is theoretically the most accurate. We demonstrate the effectiveness of each method on a series of 0-dimensional, nonlinear benchmark problems where the accuracy of the third method is shown to be up to ten times greater than the other coupling methods for selected calculations. (c) 2007 Elsevier Inc. All rights reserved. C1 [Evans, T. M.; Densmore, J. D.] Los Alamos Natl Lab, Computat Phys Grp, Los Alamos, NM 87545 USA. RP Evans, TM (reprint author), Oak Ridge Natl Lab, Reactor Anal Grp, 1 Bethel Valley Rd,POB 2008,MS6172, Oak Ridge, TN 37831 USA. EM evanstm@ornl.gov; jdd@lanl.gov NR 11 TC 4 Z9 4 U1 0 U2 1 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD AUG 10 PY 2007 VL 225 IS 2 BP 1695 EP 1720 DI 10.1016/j.jcp.2007.02.020 PG 26 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 292ZL UT WOS:000255304500026 ER PT J AU Gomberoff, K Wurtele, J Friedman, A Grote, DP Vay, JL AF Gomberoff, K. Wurtele, J. Friedman, A. Grote, D. P. Vay, J. -L. TI A method for obtaining three-dimensional computational equilibrium of non-neutral plasmas using WARP SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article DE WARP; PIC code; particle-in-cell; equilibrium; numerical equilibrium; non-neutral plasmas; plasma trap; numerical collisions; three dimensional; non-uniform field ID PURE ELECTRON-PLASMA; THERMAL-EQUILIBRIUM; TRAP; STABILITY; INJECTION AB Computer simulation studies of the stability and transport properties of trapped non-neutral plasmas require the numerical realization of a three-dimensional plasma distribution. This paper presents a new numerical method for obtaining, without an explicit model for physical collisions in the code, a low noise three-dimensional computational equilibrium distribution. This requires both the loading of particles into an idealized distribution and the relaxation from that distribution toward an approximate numerical equilibrium. The equilibrium can then be modified through a slow change of system parameters, to generate other equilibria. In the present, work we apply this method to a UC Berkeley experiment on electron confinement in magnetic geometries appropriate for the ALPHA anti-hydrogen experiment, using the three-dimensional particle-in-cell code WARP. WARP's guiding center mover and its option to switch between different solvers during a simulation are highly valuable because they speed up the simulations; they enable the practical use of the new technique for generating numerical equilibrium states of trapped non-neutral plasmas. (c) 2007 Elsevier Inc. All rights reserved. C1 [Gomberoff, K.; Wurtele, J.] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Berkeley, CA 94720 USA. [Gomberoff, K.; Wurtele, J.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. [Friedman, A.; Grote, D. P.] Lawrence Livermore Natl Lab, Fus Energy Program, Livermore, CA 94550 USA. RP Gomberoff, K (reprint author), Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel. EM katia@physics.technion.ac.il RI wurtele, Jonathan/J-6278-2016 OI wurtele, Jonathan/0000-0001-8401-0297 NR 22 TC 8 Z9 8 U1 1 U2 3 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD AUG 10 PY 2007 VL 225 IS 2 BP 1736 EP 1752 DI 10.1016/j.jcp.2007.02.029 PG 17 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 292ZL UT WOS:000255304500028 ER PT J AU Rider, WJ Greenough, JA Kamm, JR AF Rider, William J. Greenough, Jeffrey A. Kamm, James R. TI Accurate monotonicity- and extrema-preserving methods through adaptive nonlinear hybridizations SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID ESSENTIALLY NONOSCILLATORY SCHEMES; HYPERBOLIC CONSERVATION-LAWS; TAYLOR-GREEN VORTEX; HIGH-ORDER; EFFICIENT IMPLEMENTATION; NUMERICAL-METHODS; EULER EQUATIONS; UPWIND METHODS; STRONG SHOCKS; SIMULATION AB The last 20 years have seen a wide variety of high-resolution methods that can compute sharp, oscillation-free compressible flows. Here, we combine a complementary set of these methods together in a nonlinear (hybridized) fashion. Our base method is built on a monotone high-resolution Godunov method, the piece-wise parabolic method (PPM). PPM is combined with WENO methods, which reduce the damping of extrema. We find that the relative efficiency of the WENO methods is enhanced by coupling them with the relatively inexpensive Godunov methods. We accomplish our hybridizations through the use of a bounding principle: the approximation used is bounded by two nonlinearly stable approximations. The essential aspect of the method is to have high-order accurate approximations bounded by two nonoscillatory (nonlinearly stable) approximations. The end result is an accuracy-, monotonicity- and extrema-preserving method. These methods are demonstrated on a variety of flows, with quantitative analysis of the solutions with shocks. (c) 2007 Elsevier Inc. All rights reserved. C1 [Rider, William J.; Kamm, James R.] Los Alamos Natl Lab, Div Appl Phys, Los Alamos, NM 87545 USA. [Greenough, Jeffrey A.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Rider, WJ (reprint author), Sandia Natl Labs, MS 0378, Albuquerque, NM 87185 USA. EM wjrider@sandia.gov; greenoughl@llnl.gov; kammj@lanl.gov NR 38 TC 31 Z9 31 U1 2 U2 5 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD AUG 10 PY 2007 VL 225 IS 2 BP 1827 EP 1848 DI 10.1016/j.jcp.2007.02.023 PG 22 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA 292ZL UT WOS:000255304500032 ER PT J AU Jordanova, VK Spasojevic, M Thomsen, MF AF Jordanova, V. K. Spasojevic, M. Thomsen, M. F. TI Modeling the electromagnetic ion cyclotron wave-induced formation of detached subauroral proton arcs SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MAGNETOSPHERIC ELECTRIC-FIELDS; RING-CURRENT; GEOSYNCHRONOUS ORBIT; MAGNETIC-FIELD; PLASMA SHEET; CONVECTION; SPECTRA; ENERGY AB Detached dayside proton arcs have been recently observed at Earth with the IMAGE FUV instrument as subauroral arcs separated from the main oval and extending over several hours of local time in the afternoon sector. We investigate the mechanisms causing the proton precipitation during two subauroral arc events that occurred on 23 January 2001 and 18 June 2001. We employ our kinetic physics-based model coupled with a dynamic plasmasphere model and calculate the growth rate of electromagnetic ion cyclotron (EMIC) waves self-consistently with the evolving ring current H+, O+, and He+ ion distributions. Modeled plasmaspheric densities agree well with in situ observations from geosynchronous LANL satellites and duskside plasmapause observations from IMAGE EUV but overestimate the drainage plume extent toward noon on 18 June. Global images of precipitating H+ ions are obtained and compared with IMAGE observations of proton arcs. We find that EMIC waves are preferentially excited, and proton precipitation maximizes, within regions of spatial overlap of energetic ring current protons and dayside plasmaspheric plumes and along steep density gradients at the plasmapause. The model matches very well the temporal and spatial evolution of FUV observations on 23 January. The predicted location of the proton precipitation on 18 June extends a few hours westward of the observations, and an offset of 2 hours in the convection electric field is needed to reproduce well the evolution of the proton arc. This study indicates that cyclotron resonant wave-particle interactions are a viable mechanism for the generation of subauroral proton arcs. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Stanford Univ, Star Lab, Stanford, CA 94305 USA. RP Jordanova, VK (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM vania@lanl.gov OI Jordanova, Vania/0000-0003-0475-8743 NR 35 TC 57 Z9 57 U1 0 U2 3 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD AUG 10 PY 2007 VL 112 IS A8 AR A08209 DI 10.1029/2006JA012215 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 202BI UT WOS:000248876100001 ER PT J AU Wang, HC Robinson, H Ke, HM AF Wang, Huanchen Robinson, Howard Ke, Hengming TI The molecular basis for different recognition of substrates by phosphodiesterase families 4 and 10 SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE PDE4; cAMP; cGMP; substrate specificity; crystal structure ID CYCLIC-NUCLEOTIDE PHOSPHODIESTERASES; INHIBITOR SELECTIVITY; CRYSTAL-STRUCTURES; SPECIFICITY; AMP; MECHANISM; TARGETS; SYSTEM AB Phosphodiesterases (PDEs) are key enzymes that control the cellular concentrations of the second messengers cAMP and cGMP. The mechanism for selective recognition of substrates cAMP and cGMP by individual PDE families remains a puzzle. To understand the mechanism for substrate recognition by PDE enzymes, the crystal structure of the catalytic domain of an inactive D201N mutant of PDE4D2 in complex with substrate cAMP has been determined at 1.56 angstrom resolution. The structure shows that Gln369 forms only one hydrogen bond with the adenine of cAMP. This finding provides experimental evidence against the hypothesis of two hydrogen bonds between the invariant glutamine and the substrate cAMP in PDE4, and thus suggests that the widely circulated "glutamine switch" model is unlikely the mechanism for substrate recognition by PDEs. A structure comparison between PDE4D2-cAMP and PDE10A2-cAMP reveals an anti configuration of cAMP in PDE4D2 but syn in PDE10A2, in addition to different contact patterns of cAMP in these two structures. These observations imply that individual PDE families have their characteristic mechanisms for substrate recognition. (C) 2007 Published by Elsevier Ltd. C1 Univ N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599 USA. Univ N Carolina, Lineberger Comprehens Canc Ctr, Chapel Hill, NC 27599 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Ke, HM (reprint author), Univ N Carolina, Dept Biochem & Biophys, Chapel Hill, NC 27599 USA. EM hke@med.unc.edu FU NIGMS NIH HHS [GM59791, R01 GM059791, R01 GM059791-07] NR 29 TC 31 Z9 32 U1 1 U2 5 PU ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 EI 1089-8638 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 10 PY 2007 VL 371 IS 2 BP 302 EP 307 DI 10.1016/j.jmb.2007.05.060 PG 6 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 196VA UT WOS:000248509100002 PM 17582435 ER PT J AU Moore, BA Robinson, HH Xu, ZH AF Moore, Brian A. Robinson, Howard H. Xu, Zhaohui TI The crystal structure of mouse Exo70 reveals unique features of the mammalian exocyst SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE crystallography; membrane trafficking; exocytosis; exocyst; Exo70 ID MULTIPLE SEQUENCE ALIGNMENT; SACCHAROMYCES-CEREVISIAE; SUBUNIT INTERACTIONS; PLASMA-MEMBRANE; COMPLEX; EXOCYTOSIS; GTPASE; INTERACTS; VESICLES; TRANSPORT AB The exocyst is a eukaryotic tethering complex necessary for the fusion of exocytic vesicles with the plasma membrane. Its function in vivo is tightly regulated by interactions with multiple small GTPases. Exo70, one of the eight subunits of the exocyst, is important for the localization of the exocyst to the plasma membrane. It interacts with TC10 and Rho3 GTPases in mammals and yeast, respectively, and has been shown recently to bind to the actin-polymerization complex Arp /3. Here, we present the crystal structure of Mus musculus Exo70 at 2.25 A resolution. Exo70 is composed of alpha-helices in a series of right-handed helix-turn-helix motifs organized into a long rod of length 170 A and width 35 A. Although the a-helical organization of this molecule is similar to that in Saccharomyces cerevisiae Exo70, major structural differences are observed on the surface of the molecule, at the domain boundaries, and in various loop structures. In particular, the C-terminal domain of M. musculus Exo70 adopts a new orientation relative to the N-terminal half not seen in S. cerevisiae Exo70 structures. Given the low level of sequence conservation within Exo70, this structure provides new insights into our understanding of many species-specific functions of the exocyst. (C) 2007 Elsevier Ltd. All rights reserved. C1 Univ Michigan, Sch Med, Inst Life Sci, Ann Arbor, MI 48109 USA. Univ Michigan, Sch Med, Dept Biol Chem, Ann Arbor, MI 48109 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Xu, ZH (reprint author), Univ Michigan, Sch Med, Inst Life Sci, Ann Arbor, MI 48109 USA. EM zhaohui@umich.edu FU NIDDK NIH HHS [R01 DK065980, R01-DK65980, R56 DK065980, R56 DK065980-04A1] NR 47 TC 46 Z9 48 U1 0 U2 3 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 10 PY 2007 VL 371 IS 2 BP 410 EP 421 DI 10.1016/j.jmb.2007.05.018 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 196VA UT WOS:000248509100012 PM 17583731 ER PT J AU Bender, CM Holm, DD Hook, DW AF Bender, Carl M. Holm, Darryl D. Hook, Daniel W. TI Complexified dynamical systems SO JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL LA English DT Article ID SYMMETRIC QUANTUM-MECHANICS; CLASSICAL TRAJECTORIES; HAMILTONIANS; EQUATION AB Many dynamical systems, such as the Lotka-Volterra predator-prey model and the Euler equations for the free rotation of a rigid body, are PT symmetric. The standard and well-known real solutions to such dynamical systems constitute an infinitessimal subclass of the full set of complex solutions. This paper examines a subset of the complex solutions that contains the real solutions, namely those having PT symmetry. The condition of PT symmetry selects out complex solutions that are periodic. C1 Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Univ London Imperial Coll Sci Technol & Med, Dept Math, London SW7 2AZ, England. Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England. Washington Univ, Dept Phys, St Louis, MO 63130 USA. RP Bender, CM (reprint author), Los Alamos Natl Lab, Ctr Nonlinear Studies, POB 1663, Los Alamos, NM 87545 USA. EM cmb@wustl.edu; dholm@ic.ac.uk; d.hook@imperial.ac.uk RI Hook, Daniel/C-4764-2008; OI Hook, Daniel/0000-0001-9746-1193; Holm, Darryl D/0000-0001-6362-9912 NR 20 TC 38 Z9 38 U1 2 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 1751-8113 J9 J PHYS A-MATH THEOR JI J. Phys. A-Math. Theor. PD AUG 10 PY 2007 VL 40 IS 32 BP F793 EP F804 DI 10.1088/1751-8113/40/32/F02 PG 12 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA 193CB UT WOS:000248250100002 ER PT J AU Konik, RM AF Konik, Robert M. TI Transport properties of multiple quantum dots arranged in parallel: results from the Bethe ansatz SO NEW JOURNAL OF PHYSICS LA English DT Article ID SINGLE-ELECTRON TRANSISTOR; DIMENSIONAL HUBBARD-MODEL; ANDERSON MODEL; EXCITATIONS; IMPURITY; FIELD AB In this paper we analyse transport through a double dot system connected to two external leads. Imagining each dot possessing a single active level, we model the system through a generalization of the Anderson model. We argue that this model is exactly solvable when certain constraints are placed upon the dot Coulomb charging energy, the dot-lead hybridization, and the value of the applied gate voltage. Using this exact solvability, we access the zero temperature linear response conductance both in and out of the presence of a Zeeman field. We are also able to study the finite temperature linear response conductance. We focus on universal behaviour and identify three primary features in the transport of the dots: (i) a so-called Ruderman-Kittel-Kasuya-Yosida (RKKY) Kondo effect; (ii) a standard Kondo effect; and (iii) interference phenomena leading to sharp variations in the conductance including conductance zeros. We are able to use the exact solvability of the dot model to characterize these phenomena quantitatively. While here we primarily consider a double dot system, the approach adopted applies equally well to N-dot systems. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Konik, RM (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. EM rmk@bnl.gov RI Konik, Robert/L-8076-2016 OI Konik, Robert/0000-0003-1209-6890 NR 60 TC 4 Z9 4 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1367-2630 J9 NEW J PHYS JI New J. Phys. PD AUG 10 PY 2007 VL 9 AR 257 DI 10.1088/1367-2630/9/8/257 PG 43 WC Physics, Multidisciplinary SC Physics GA 205KD UT WOS:000249111500005 ER PT J AU Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Aguilo, E Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Ancu, LS Andeen, T Anderson, S Andrieu, B Anzelc, MS Arnoud, Y Arov, M Arthaud, M Askew, A Asman, B Jesus, ACSA Atramentov, O Autermann, C Avila, C Ay, C Badaud, F Baden, A Bagby, L Baldin, B Bandurin, DV Banerjee, P Banerjee, S Barberis, E Barfuss, AF Bargassa, P Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Beale, S Bean, A Begalli, M Begel, M Belanger-Champagne, C Bellantoni, L Bellavance, A Benitez, JA Beri, SB Bernardi, G Bernhard, R Berntzon, L Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Biscarat, C Blazey, G Blekman, F Blessing, S Bloch, D Bloom, K Boehnlein, A Boline, D Bolton, TA Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Brown, D Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burke, S Burnett, TH Buszello, CP Butler, JM Calfayan, P Calvet, S Cammin, J Caron, S Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, K Chan, KM Chandra, A Charles, F Cheu, E Chevallier, F Cho, DK Choi, S Choudhary, B Christofek, L Christoudias, T Cihangir, S Claes, D Clement, B Clement, C Coadou, Y Cooke, M Cooper, WE Corcoran, M Couderc, F Cousinou, MC Crepe-Renaudin, S Cutts, D Cwiok, M da Motta, H Das, A Davies, G De, K de Jong, P de Jong, SJ De La Cruz-Burelo, E Martins, CD Degenhardt, JD Deliot, F Demarteau, M Demina, R Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Dominguez, A Dong, H Dudko, LV Duflot, L Dugad, SR Duggan, D Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Ellison, J Elvira, VD Enari, Y Eno, S Ermolov, P Evans, H Evdokimov, A Evdokimov, VN Ferapontov, AV Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Ford, M Fortner, M Fox, H Fu, S Fuess, S Gadfort, T Galea, CF Gallas, E Galyaev, E Garcia, C Garcia-Bellido, A Gavrilov, V Gay, P Geist, W Gele, D Gerber, CE Gershtein, Y Gillberg, D Ginther, G Gollub, N Gomez, B Goussiou, A Grannis, PD Greenlee, H Greenwood, ZD Gregores, EM Grenier, G Gris, P Grivaz, JF Grohsjean, A Grunendahl, S Grunewald, MW Guo, F Guo, J Gutierrez, G Gutierrez, P Haas, A Hadley, NJ Haefner, P Hagopian, S Haley, J Hall, I Hall, RE Han, L Hanagaki, K Hansson, P Harder, K Harel, A Harrington, R Hauptman, JM Hauser, R Hays, J Hebbeker, T Hedin, D Hegeman, JG Heinmiller, JM Heinson, AP Heintz, U Hensel, C Herner, K Hesketh, G Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Hoeth, H Hohlfeld, M Hong, SJ Hooper, R Hossain, S Houben, P Hu, Y Hubacek, Z Hynek, V Iashvili, I Illingworth, R Ito, AS Jabeen, S Jaffre, M Jain, S Jakobs, K Jarvis, C Jesik, R Johns, K Johnson, C Johnson, M Jonckheere, A Jonsson, P Juste, A Kafer, D Kahn, S Kajfasz, E Kalinin, AM Kalk, JM Kalk, JR Kappler, S Karmanov, D Kasper, J Kasper, P Katsanos, I Kau, D Kaur, R Kaushik, V Kehoe, R Kermiche, S Khalatyan, N Khanov, A Kharchilava, A Kharzheev, YM Khatidze, D Kim, H Kim, TJ Kirby, MH Kirsch, M Klima, B Kohli, JM Konrath, JP Kopal, M Korablev, VM Kothari, B Kozelov, AV Krop, D Kryemadhi, A Kuhl, T Kumar, A Kunori, S Kupco, A Kurca, T Kvita, J Lam, D Lammers, S Landsberg, G Lazoflores, J Lebrun, P Lee, WM Leflat, A Lehner, F Lellouch, J Lesne, V Leveque, J Lewis, P Li, J Li, L Li, QZ Lietti, SM Lima, JGR Lincoln, D Linnemann, J Lipaev, VV Lipton, R Liu, Y Liu, Z Lobo, L Lobodenko, A Lokajicek, M Lounis, A Love, P Lubatti, HJ Lyon, AL Maciel, AKA Mackin, D Madaras, RJ Mattig, P Magass, C Magerkurth, A Makovec, N Mal, PK Malbouisson, HB Malik, S Malyshev, VL Mao, HS Maravin, Y Martin, B McCarthy, R Melnitchouk, A Mendes, A Mendoza, L Mercadante, PG Merkin, M Merritt, KW Meyer, A Meyer, J Michaut, M Millet, T Mitrevski, J Molina, J Mommsen, RK Mondal, NK Moore, RW Moulik, T Muanza, GS Mulders, M Mulhearn, M Mundal, O Mundim, L Nagy, E Naimuddin, M Narain, M Naumann, NA Neal, HA Negret, JP Neustroev, P Nilsen, H Noeding, C Nomerotski, A Novaes, SF Nunnemann, T O'Dell, V O'Neil, DC Obrant, G Ochando, C Onoprienko, D Oshima, N Osta, J Otec, R Otero y Garzon, GJ Owen, M Padley, P Pangilinan, M Parashar, N Park, SJ Park, SK Parsons, J Partridge, R Parua, N Patwa, A Pawloski, G Perea, PM Peters, K Peters, Y Petroff, P Petteni, M Piegaia, R Piper, J Pleier, MA Podesta-Lerma, PLM Podstavkov, VM Pogorelov, Y Pol, ME Pompos, A Pope, BG Popov, AV Potter, C da Silva, WLP Prosper, HB Protopopescu, S Qian, J Quadt, A Quinn, B Rakitine, A Rangel, MS Rani, KJ Ranjan, K Ratoff, PN Renkel, P Reucroft, S Rich, P Rijssenbeek, M Ripp-Baudot, I Rizatdinova, F Robinson, S Rodrigues, RF Royon, C Rubinov, P Ruchti, R Safonov, G Sajot, G Sanchez-Hernandez, A Sanders, MP Santoro, A Savage, G Sawyer, L Scanlon, T Schaile, D Schamberger, RD Scheglov, Y Schellman, H Schieferdecker, P Schleiphake, T Schmitt, C Schwanenberger, C Schwartzman, A Schwienhorst, R Sekaric, J Sengupta, S Severini, H Shabalina, E Shamim, M Shary, V Shchukin, AA Shivpuri, RK Shpakov, D Siccardi, V Simak, V Sirotenko, V Skubic, P Slattery, P Smirnov, D Smith, RP Snow, GR Snow, J Snyder, S Soldner-Rembold, S Sonnenschein, L Sopczak, A Sosebee, M Soustruznik, K Souza, M Spurlock, B Stark, J Steele, J Stolin, V Stone, A Stoyanova, DA Strandberg, J Strandberg, S Strang, MA Strauss, M Strohmer, R Strom, D Strovink, M Stutte, L Sumowidagdo, S Svoisky, P Sznajder, A Talby, M Tamburello, P Tanasijczuk, A Taylor, W Telford, P Temple, J Tiller, B Tissandier, F Titov, M Tokmenin, VV Tomoto, M Toole, T Torchiani, I Trefzger, T Tsybychev, D Tuchming, B Tully, C Tuts, PM Unalan, R Uvarov, L Uvarov, S Uzunyan, S Vachon, B van den Berg, PJ van Eijk, B van Kooten, R van Leeuwen, WM Varelas, N Varnes, EW Vartapetian, A Vasilyev, IA Vaupel, M Verdier, P Vertogradov, LS Verzocchi, M Villeneuve-Seguier, F Vint, P Von Toerne, E Voutilainen, M Vreeswijk, M Wagner, R Wahl, HD Wang, L Wang, MHLS Warchol, J Watts, G Wayne, M Weber, G Weber, M Weerts, H Wenger, A Wermes, N Wetstein, M White, A Wicke, D Wilson, GW Wimpenny, SJ Wobisch, M Wood, DR Wyatt, TR Xie, Y Yacoob, S Yamada, R Yan, M Yasuda, T Yatsunenko, YA Yip, K Yoo, HD Youn, SW Yu, C Yu, J Yurkewicz, A Zatserklyaniy, A Zeitnitz, C Zhang, D Zhao, T Zhou, B Zhu, J Zielinski, M Zieminska, D Zieminski, A Zivkovic, L Zutshi, V Zverev, EG AF Abazov, V. M. Abbott, B. Abolins, M. Acharya, B. S. Adams, M. Adams, T. Aguilo, E. Ahn, S. H. Ahsan, M. Alexeev, G. D. Alkhazov, G. Alton, A. Alverson, G. Alves, G. A. Anastasoaie, M. Ancu, L. S. Andeen, T. Anderson, S. Andrieu, B. Anzelc, M. S. Arnoud, Y. Arov, M. Arthaud, M. Askew, A. Asman, B. Jesus, A. C. S. Assis Atramentov, O. Autermann, C. Avila, C. Ay, C. Badaud, F. Baden, A. Bagby, L. Baldin, B. Bandurin, D. V. Banerjee, P. Banerjee, S. Barberis, E. Barfuss, A.-F. Bargassa, P. Baringer, P. Barreto, J. Bartlett, J. F. Bassler, U. Bauer, D. Beale, S. Bean, A. Begalli, M. Begel, M. Belanger-Champagne, C. Bellantoni, L. Bellavance, A. Benitez, J. A. Beri, S. B. Bernardi, G. Bernhard, R. Berntzon, L. Bertram, I. Besancon, M. Beuselinck, R. Bezzubov, V. A. Bhat, P. C. Bhatnagar, V. Biscarat, C. Blazey, G. Blekman, F. Blessing, S. Bloch, D. Bloom, K. Boehnlein, A. Boline, D. Bolton, T. A. Borissov, G. Bos, K. Bose, T. Brandt, A. Brock, R. Brooijmans, G. Bross, A. Brown, D. Buchanan, N. J. Buchholz, D. Buehler, M. Buescher, V. Burdin, S. Burke, S. Burnett, T. H. Buszello, C. P. Butler, J. M. Calfayan, P. Calvet, S. Cammin, J. Caron, S. Carvalho, W. Casey, B. C. K. Cason, N. M. Castilla-Valdez, H. Chakrabarti, S. Chakraborty, D. Chan, K. Chan, K. M. Chandra, A. Charles, F. Cheu, E. Chevallier, F. Cho, D. K. Choi, S. Choudhary, B. Christofek, L. Christoudias, T. Cihangir, S. Claes, D. Clement, B. Clement, C. Coadou, Y. Cooke, M. Cooper, W. E. Corcoran, M. Couderc, F. Cousinou, M.-C. Crepe-Renaudin, S. Cutts, D. Cwiok, M. da Motta, H. Das, A. Davies, G. De, K. de Jong, P. de Jong, S. J. De La Cruz-Burelo, E. De Oliveira Martins, C. Degenhardt, J. D. Deliot, F. Demarteau, M. Demina, R. Denisov, D. Denisov, S. P. Desai, S. Diehl, H. T. Diesburg, M. Dominguez, A. Dong, H. Dudko, L. V. Duflot, L. Dugad, S. R. Duggan, D. Duperrin, A. Dyer, J. Dyshkant, A. Eads, M. Edmunds, D. Ellison, J. Elvira, V. D. Enari, Y. Eno, S. Ermolov, P. Evans, H. Evdokimov, A. Evdokimov, V. N. 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Strandberg, S. Strang, M. A. Strauss, M. Stroehmer, R. Strom, D. Strovink, M. Stutte, L. Sumowidagdo, S. Svoisky, P. Sznajder, A. Talby, M. Tamburello, P. Tanasijczuk, A. Taylor, W. Telford, P. Temple, J. Tiller, B. Tissandier, F. Titov, M. Tokmenin, V. V. Tomoto, M. Toole, T. Torchiani, I. Trefzger, T. Tsybychev, D. Tuchming, B. Tully, C. Tuts, P. M. Unalan, R. Uvarov, L. Uvarov, S. Uzunyan, S. Vachon, B. van den Berg, P. J. van Eijk, B. Van Kooten, R. van Leeuwen, W. M. Varelas, N. Varnes, E. W. Vartapetian, A. Vasilyev, I. A. Vaupel, M. Verdier, P. Vertogradov, L. S. Verzocchi, M. Villeneuve-Seguier, F. Vint, P. Von Toerne, E. Voutilainen, M. Vreeswijk, M. Wagner, R. Wahl, H. D. Wang, L. Wang, M. H. L. S. Warchol, J. Watts, G. Wayne, M. Weber, G. Weber, M. Weerts, H. Wenger, A. Wermes, N. Wetstein, M. White, A. Wicke, D. Wilson, G. W. Wimpenny, S. J. Wobisch, M. Wood, D. R. Wyatt, T. R. Xie, Y. Yacoob, S. Yamada, R. Yan, M. Yasuda, T. Yatsunenko, Y. A. Yip, K. Yoo, H. D. Youn, S. W. Yu, C. Yu, J. Yurkewicz, A. Zatserklyaniy, A. Zeitnitz, C. Zhang, D. Zhao, T. Zhou, B. Zhu, J. Zielinski, M. Zieminska, D. Zieminski, A. Zivkovic, L. Zutshi, V. Zverev, E. G. TI Search for third-generation scalar leptoquarks in p(p)over-bar collisions at root s=1.96 TeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID CONSTRAINTS; TECHNICOLOR AB We report on a search for charge-1/3 third-generation leptoquarks (LQ) produced in p (p) over bar collisions at root s =1.96 TeV using the D0 detector at Fermilab. Third-generation leptoquarks are assumed to be produced in pairs and to decay to a tau neutrino and a b quark with branching fraction B. We place upper limits on sigma(p (p) over bar -> LQ (LQ) over bar )B-2 as a function of the leptoquark mass M-LQ. Assuming B=1, we exclude at the 95% confidence level third-generation scalar leptoquarks with M-LQ < 229 GeV. C1 Univ Buenos Aires, Buenos Aires, DF, Argentina. Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil. Univ Estado Rio De Janerio, Rio De Janeiro, Brazil. Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil. Univ Alberta, Edmonton, AB, Canada. Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada. York Univ, Toronto, ON, Canada. McGill Univ, Montreal, PQ, Canada. Univ Sci & Technol China, Hefei 230026, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic. Czech Tech Univ, CR-16635 Prague, Czech Republic. Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco, Quito, Ecuador. Univ Clermont Ferrand, CNRS, IN2P3, Phys Corpusculaire Lab, Clermont Ferrand, France. Univ Grenoble 1, CNRS, IN2P3, Lab Phys Subatom & Cosmol, Grenoble, France. Univ La Mediterranee, CNRS, IN2P3, Marseille, France. CNRS, Univ Paris 11, IN2P3, Accelerateur Lineaire Lab, Orsay, France. Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France. Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France. DAPNIA, Serv Phys Particules, Saclay, France. Univ Haute Alsace, CNRS, IN2P3, Strasbourg, France. Univ Strasbourg 1, CNRS, IN2P3, IPHC, Strasbourg, France. Univ Lyon 1, CNRS, IPNL, IN2P3, F-69622 Villeurbanne, France. Univ Lyon, CNRS, IPNL, IN2P3, Lyon, France. Rhein Westfal TH Aachen, Inst Phys 3, D-5100 Aachen, Germany. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Freiburg, Inst Phys, Freiburg, Germany. Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Univ Munich, Munich, Germany. Univ Wuppertal, Fachbereich Phys, Wuppertal, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi, India. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Univ Coll Dublin, Dublin 2, Ireland. Korea Univ, Korea Detector Lab, Seoul 136701, South Korea. Sungkyunkwan Univ, Suwon, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. NIKHEF, FOM Inst, Amsterdam, Netherlands. Univ Radboud, NIKHEF, Nijmegen, Netherlands. Joint Inst Nucl Res, Dubna, Russia. Inst Theoret & Expt Phys, Moscow 117259, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Petersburg Nucl Phys inst, St Petersburg, Russia. Lund Univ, Lund, Sweden. Stockholm Univ, Royal Inst Technol, Stockholm, Sweden. Uppsala Univ, Uppsala, Sweden. Univ Zurich, Inst Phys, Zurich, Switzerland. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci Technol & Med, London, England. Univ Manchester, Manchester, Lancs, England. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Illinois, Chicago, IL 60607 USA. No Illinois Univ, De Kalb, IL 60115 USA. Northwestern Univ, Evanston, IL 60208 USA. Indiana Univ, Bloomington, IN 47405 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Purdue Univ Calumet, Hammond, IN 46323 USA. Lowa State Univ, Ames, IA 50011 USA. Univ Kansas, Lawrence, KS 66045 USA. Kansas State Univ, Manhattan, KS 66506 USA. Louisiana Tech Univ, Ruston, LA 71270 USA. Univ Maryland, College Pk, MD 20742 USA. Boston Univ, Boston, MA 02215 USA. Northeastern Univ, Boston, MA 02115 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Mississippi, University, MS 38677 USA. Univ Nebraska, Lincoln, NE 68588 USA. Princeton Univ, Princeton, NJ 08544 USA. SUNY Buffalo, Buffalo, NY 14260 USA. Columbia Univ, New York, NY 10027 USA. Univ Rochester, Rochester, NY 14627 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Langston Univ, Oklahoma City, OK 73050 USA. Univ Oklahoma, Norman, OK 73019 USA. Oklahoma State Univ, Stillwater, OK 74078 USA. Brown Univ, Providence, RI 02912 USA. Univ Texas, Arlington, TX 76019 USA. So Methodist Univ, Dallas, TX 75275 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. RP Abazov, VM (reprint author), Univ Buenos Aires, Buenos Aires, DF, Argentina. RI Fisher, Wade/N-4491-2013; Ancu, Lucian Stefan/F-1812-2010; Alves, Gilvan/C-4007-2013; Deliot, Frederic/F-3321-2014; Sharyy, Viatcheslav/F-9057-2014; Christoudias, Theodoros/E-7305-2015; KIM, Tae Jeong/P-7848-2015; Guo, Jun/O-5202-2015; Sznajder, Andre/L-1621-2016; Li, Liang/O-1107-2015; Mundim, Luiz/A-1291-2012; Nomerotski, Andrei/A-5169-2010; Novaes, Sergio/D-3532-2012; Merkin, Mikhail/D-6809-2012; De, Kaushik/N-1953-2013; Leflat, Alexander/D-7284-2012; Dudko, Lev/D-7127-2012; Shivpuri, R K/A-5848-2010; Telford, Paul/B-6253-2011; Gutierrez, Phillip/C-1161-2011; Mercadante, Pedro/K-1918-2012; Yip, Kin/D-6860-2013 OI Ancu, Lucian Stefan/0000-0001-5068-6723; Sharyy, Viatcheslav/0000-0002-7161-2616; Christoudias, Theodoros/0000-0001-9050-3880; KIM, Tae Jeong/0000-0001-8336-2434; Guo, Jun/0000-0001-8125-9433; Sznajder, Andre/0000-0001-6998-1108; Li, Liang/0000-0001-6411-6107; Mundim, Luiz/0000-0001-9964-7805; Novaes, Sergio/0000-0003-0471-8549; De, Kaushik/0000-0002-5647-4489; Dudko, Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311 NR 30 TC 17 Z9 17 U1 0 U2 5 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. 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Sundermann, J. E. Volk, A. Bernard, D. Bonneaud, G. R. Latour, E. Lombardo, V. Thiebaux, Ch. Verderi, M. Clark, P. J. Gradl, W. Muheim, F. Playfer, S. Robertson, A. I. Xie, Y. Andreotti, M. Bettoni, D. Bozzi, C. Calabrese, R. Cecchi, A. Cibinetto, G. Franchini, P. Luppi, E. Negrini, M. Petrella, A. Piemontese, L. Prencipe, E. Santoro, V. Anulli, F. Baldini-Ferroli, R. Calcaterra, A. de Sangro, R. Finocchiaro, G. Pacetti, S. Patteri, P. Peruzzi, I. M. Piccolo, M. Rama, M. Zallo, A. Buzzo, A. Contri, R. Lo Vetere, M. Macri, M. M. Monge, M. R. Passaggio, S. Patrignani, C. Robutti, E. Santroni, A. Tosi, S. Chaisanguanthum, K. S. Morii, M. Wu, J. Dubitzky, R. S. Marks, J. Schenk, S. Uwer, U. Bard, D. J. Dauncey, P. D. Flack, R. L. Nash, J. A. Nikolich, M. B. Vazquez, W. Panduro Behera, P. K. Chai, X. Charles, M. J. Mallik, U. Meyer, N. T. Ziegler, V. Cochran, J. Crawley, H. B. Dong, L. Eyges, V. Meyer, W. T. Prell, S. Rosenberg, E. I. Rubin, A. E. Gritsan, A. V. Guo, Z. J. Lae, C. K. 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Lazzaro, A. Palombo, F. Bauer, J. M. Cremaldi, L. Eschenburg, V. Godang, R. Kroeger, R. Sanders, D. A. Summers, D. J. Zhao, H. W. Brunet, S. Cote, D. Simard, M. Taras, P. Viaud, F. B. Nicholson, H. De Nardo, G. Fabozzi, F. Lista, L. Monorchio, D. Sciacca, C. Baak, M. A. Raven, G. Snoek, H. L. Jessop, C. P. LoSecco, J. M. Benelli, G. Corwin, L. A. Gan, K. K. Honscheid, K. Hufnagel, D. Kagan, H. Kass, R. Morris, J. P. Rahimi, A. M. Regensburger, J. J. Ter-Antonyan, R. Wong, Q. K. Blount, N. L. Brau, J. Frey, R. Igonkina, O. Kolb, J. A. Lu, M. Rahmat, R. Sinev, N. B. Strom, D. Strube, J. Torrence, E. Gagliardi, N. Gaz, A. Margoni, M. Morandin, M. Pompili, A. Posocco, M. Rotondo, M. Simonetto, F. Stroili, R. Voci, C. Ben-Haim, E. Briand, H. Chauveau, J. David, P. Del Buono, L. de la Vaissiere, Ch. Hamon, O. Hartfiel, B. L. Leruste, Ph. Malcles, J. Ocariz, J. Perez, A. Gladney, L. Biasini, M. Covarelli, R. Manoni, E. Angelini, C. Batignani, G. Bettarini, S. Calderini, G. Carpinelli, M. Cenci, R. Cervelli, A. Forti, F. Giorgi, M. A. Lusiani, A. Marchiori, G. Mazur, M. A. Morganti, M. Neri, N. Paoloni, E. Rizzo, G. Walsh, J. J. Haire, M. Biesiada, J. Elmer, P. Lau, Y. P. Lu, C. Olsen, J. Smith, A. J. S. Telnov, A. V. Baracchini, E. Bellini, F. Cavoto, G. D'Orazio, A. del Re, D. Di Marco, E. Faccini, R. Ferrarotto, F. Ferroni, F. Gaspero, M. Jackson, P. D. Li Gioi, L. Mazzoni, M. A. Morganti, S. Piredda, G. Polci, F. Renga, F. Voena, C. Ebert, M. Schroeder, H. Waldi, R. Adye, T. Castelli, G. Franek, B. Olaiya, E. O. Ricciardi, S. Roethel, W. Wilson, F. F. Aleksan, R. Emery, S. Escalier, M. Gaidot, A. Ganzhur, S. F. de Monchenault, G. Hamel Kozanecki, W. Legendre, M. Vasseur, G. Yeche, Ch. Zito, M. Chen, X. R. Liu, H. Park, W. Purohit, M. V. Wilson, J. R. Allen, M. T. Aston, D. Bartoldus, R. Bechtle, P. Berger, N. Claus, R. Coleman, J. P. Convery, M. R. Dingfelder, J. C. Dorfan, J. Dubois-Felsmann, G. P. Dujmic, D. Dunwoodie, W. Field, R. C. Glanzman, T. Gowdy, S. J. Graham, M. T. Grenier, P. Hast, C. Hryn'ova, T. Innes, W. R. Kelsey, M. H. Kim, H. Kim, P. Leith, D. W. G. S. Li, S. Luitz, S. Luth, V. Lynch, H. L. MacFarlane, D. B. Marsiske, H. Messner, R. Muller, D. R. O'Grady, C. P. Perazzo, A. Perl, M. Pulliam, T. Ratcliff, B. N. Roodman, A. Salnikov, A. A. Schindler, R. H. Schwiening, J. Snyder, A. Stelzer, J. Su, D. Sullivan, M. K. Suzuki, K. Swain, S. K. Thompson, J. M. Va'vra, J. van Bakel, N. Wagner, A. P. Weaver, M. Wisniewski, W. J. Wittgen, M. Wright, D. H. Yarritu, A. K. Yi, K. Young, C. C. Burchat, P. R. Edwards, A. J. Majewski, S. A. Petersen, B. A. Wilden, L. Ahmed, S. Alam, M. S. Bula, R. Ernst, J. A. Jain, V. Pan, B. Saeed, M. A. Wappler, F. R. Zain, S. B. Bugg, W. Krishnamurthy, M. Spanier, S. M. Eckmann, R. Ritchie, J. L. Ruland, A. M. Schilling, C. J. Schwitters, R. F. Izen, J. M. Lou, X. C. Ye, S. Bianchi, F. Gallo, F. Gamba, D. Pelliccioni, M. Bomben, M. Bosisio, L. Cartaro, C. Cossutti, F. Della Ricca G. Lanceri, L. Vitale, L. Azzolini, V. Lopez-March, N. Martinez-Vidal, F. Milanes, D. A. Oyanguren, A. Albert, J. Banerjee, Sw. Bhuyan, B. Hamano, K. Kowalewski, R. Nugent, I. M. Roney, J. M. Sobie, R. J. Back, J. J. Harrison, P. F. Latham, T. E. Mohanty, G. B. Pappagallo, M. Band, H. R. Chen, X. Dasu, S. Flood, K. T. Hollar, J. J. Kutter, P. E. Pan, Y. Pierini, M. Prepost, R. Wu, S. L. Yu, Z. Neal, H. TI Production and decay of Omega(0)(c) SO PHYSICAL REVIEW LETTERS LA English DT Article ID BARYON-ANTIBARYON PAIRS; HEAVY QUARKS; EXCLUSIVE DECAYS; FRAGMENTATION; ANNIHILATION; LIFETIME; PHYSICS; MESONS AB We present an analysis of inclusive Omega(0)(c) baryon production and decays in 230.5 fb(-1) of data recorded with the BABAR detector. Omega(0)(c) baryons are reconstructed in four final states (Omega(-)pi(+), Omega(-)pi(+)pi(0), Omega(-)pi(+)pi(+)pi(-), Xi K--(-)pi(+)pi(+)) and the corresponding ratios of branching fractions are measured. We also measure the momentum spectrum in the e(+)e(-) center-of-mass frame. From the spectrum, we observe Omega(0)(c) production from B decays and in c (c) over bar events, and extract the two rates of production. C1 CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Savoie, F-74941 Annecy Le Vieux, France. Univ Barcelona, Dept ECM, Fac Fis, E-08208 Barcelona, Spain. Univ Bari, Dipartimento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, Bari, Italy. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 ITL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Frascati INFN, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany. Univ Paris 11, Ctr Sci Orsay, F-91898 Orsay, France. CNRS, Lab Accelerateur Lineaire, IN2P3, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. Univ London, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Particle Phys, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico 2, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF, Natl Inst Nucl Phys, High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Denis Diderot, CNRS, IN2P3, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Paris 07, CNRS, IN2P3, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Paris 06, CNRS, IN2P3, Lab Phys Nucl & Hautes Energies, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Turin, Dipartimento Fis, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. CSIC, E-46071 Valencia, Spain. Univ Valencia, E-46071 Valencia, Spain. IFIC, E-46071 Valencia, Spain. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Aubert, B (reprint author), CNRS, IN2P3, Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Luppi, Eleonora/A-4902-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Lusiani, Alberto/N-2976-2015; Morandin, Mauro/A-3308-2016; Lusiani, Alberto/A-3329-2016; Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; Pappagallo, Marco/R-3305-2016; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Roe, Natalie/A-8798-2012; Saeed, Mohammad Alam/J-7455-2012; Negrini, Matteo/C-8906-2014; Monge, Maria Roberta/G-9127-2012; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; Neri, Nicola/G-3991-2012; Oyanguren, Arantza/K-6454-2014 OI Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; Lusiani, Alberto/0000-0002-6876-3288; Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Pappagallo, Marco/0000-0001-7601-5602; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Saeed, Mohammad Alam/0000-0002-3529-9255; Negrini, Matteo/0000-0003-0101-6963; Monge, Maria Roberta/0000-0003-1633-3195; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Oyanguren, Arantza/0000-0002-8240-7300 NR 22 TC 16 Z9 17 U1 0 U2 3 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 AUG 10 PY 2007 VL 99 IS 6 AR 062001 DI 10.1103/PhysRevLett.99.062001 PG 7 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700010 PM 17930815 ER PT J AU Beloborodov, IS Glatz, A Vinokur, VM AF Beloborodov, I. S. Glatz, A. Vinokur, V. M. TI Electron transport in nanogranular ferromagnets SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHASE-SEPARATION; COLOSSAL MAGNETORESISTANCE; MANGANESE OXIDES; NANOCRYSTAL SUPERLATTICES; DOPED MANGANITES; GRANULAR FILMS; SPIN; RESISTIVITY AB We study electronic transport properties of ferromagnetic nanoparticle arrays and nanodomain materials near the Curie temperature in the limit of weak coupling between the grains. We calculate the conductivity in the Ohmic and non-Ohmic regimes and estimate the magnetoresistance jump in the resistivity at the transition temperature. The results are applicable for many emerging materials, including artificially self-assembled nanoparticle arrays and a certain class of manganites, where localization effects within the clusters can be neglected. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Chicago, James Franck Inst, Chicago, IL 60637 USA. RP Beloborodov, IS (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 31 TC 16 Z9 16 U1 3 U2 13 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 AUG 10 PY 2007 VL 99 IS 6 AR 066602 DI 10.1103/PhysRevLett.99.066602 PG 4 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700042 PM 17930847 ER PT J AU Borunda, M Nunner, TS Luck, T Sinitsyn, NA Timm, C Wunderlich, J Jungwirth, T MacDonald, AH Sinova, J AF Borunda, Mario Nunner, Tamara S. Lueck, Thomas Sinitsyn, N. A. Timm, Carsten Wunderlich, J. Jungwirth, T. MacDonald, A. H. Sinova, Jairo TI Absence of skew scattering in two-dimensional systems: Testing the origins of the anomalous hall effect SO PHYSICAL REVIEW LETTERS LA English DT Article ID BERRY PHASE AB We study the anomalous Hall conductivity in spin-polarized, asymmetrically confined two-dimensional electron and hole systems, taking into account the intrinsic, side-jump, and skew-scattering contributions to the transport. We find that the skew scattering, principally responsible for the extrinsic contribution to the anomalous Hall effect, vanishes for the two-dimensional electron system if both chiral Rashba subbands are partially occupied, and vanishes always for the two-dimensional hole gas studied here, regardless of the band filling. Our prediction can be tested with the proposed coplanar two-dimensional electron-hole gas device and can be used as a benchmark to understand the crossover from the intrinsic to the extrinsic anomalous Hall effect. C1 Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA. Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany. Los Alamos Natl Lab, Stat Sci Div, Ctr Nonlinear Studies & Comp, Los Alamos, NM 87544 USA. Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA. Hitachi Cambridge Lab, Cambridge CB3 0HE, England. Inst Phys ASCR, Prague 16253 6, Czech Republic. Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. Univ Texas, Dept Phys, Austin, TX 78712 USA. RP Borunda, M (reprint author), Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA. RI Borunda, Mario/A-1315-2011; Sinitsyn, nikolai/B-5617-2009; Wunderlich, Joerg/G-6918-2014; Sinova, Jairo/G-9071-2014; Jungwirth, Tomas/G-8952-2014 OI Sinova, Jairo/0000-0002-9490-2333; Jungwirth, Tomas/0000-0002-9910-1674 NR 33 TC 30 Z9 30 U1 1 U2 9 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 AUG 10 PY 2007 VL 99 IS 6 AR 066604 DI 10.1103/PhysRevLett.99.066604 PG 4 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700044 PM 17930849 ER PT J AU Chaudhuri, P Berthier, L Kob, W AF Chaudhuri, Pinaki Berthier, Ludovic Kob, Walter TI Universal nature of particle displacements close to glass and jamming transitions SO PHYSICAL REVIEW LETTERS LA English DT Article ID SUPERCOOLED LIQUIDS; RANDOM-WALKS; DIFFUSION; DYNAMICS; MODEL AB We examine the structure of the distribution of single particle displacements (van Hove function) in a broad class of materials close to glass and jamming transitions. In a wide time window comprising structural relaxation, van Hove functions reflect the coexistence of slow and fast particles (dynamic heterogeneity). The tails of the distributions exhibit exponential, rather than Gaussian, decay. We argue that this behavior is universal in glassy materials and should be considered the analog, in space, of the stretched exponential decay of time correlation functions. We introduce a dynamical model that describes quantitatively numerical and experimental data in supercooled liquids, colloidal hard spheres, and granular materials. The tails of the distributions directly explain the decoupling between translational diffusion and structural relaxation observed in glassy materials. C1 Univ Montpellier 2, CNRS, UMR 5587, Lab Colloides,Verres & Nanomateriaux, F-34095 Montpellier, France. Univ Chicago, Argonne Natl Lab, Joint Theory Inst, Chicago, IL 60637 USA. RP Chaudhuri, P (reprint author), Univ Montpellier 2, CNRS, UMR 5587, Lab Colloides,Verres & Nanomateriaux, F-34095 Montpellier, France. RI Chaudhuri, Pinaki/A-2673-2009; Berthier, Ludovic/I-7104-2012; Kob, Walter/L-7010-2013 OI Kob, Walter/0000-0001-7405-2178 NR 34 TC 165 Z9 167 U1 1 U2 59 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 AUG 10 PY 2007 VL 99 IS 6 AR 060604 DI 10.1103/PhysRevLett.99.060604 PG 4 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700007 PM 17930812 ER PT J AU Goity, JL Scoccola, NN AF Goity, J. L. Scoccola, N. N. TI Photoproduction of positive-parity excited baryons in the 1/N-c expansion of QCD SO PHYSICAL REVIEW LETTERS LA English DT Article ID PION-EXCHANGE CURRENTS; N-C-QCD; NUCLEON RESONANCES; PHENOMENOLOGY; COUPLINGS; DECAYS; MASSES; QUARKS AB We analyze the photoproduction helicity amplitudes for positive-parity excited baryons in the context of the 1/N-c expansion of QCD. The results show that subleading corrections in 1/N-c are important and that, while one-body effective operators are dominant, there is some evidence for the need for two-body effects. C1 Hampton Univ, Dept Phys, Hampton, VA 23668 USA. Thomas Jefferson Natl Accelerator Facility, Newport News, VA 23606 USA. Comis Nacl Energia Atom, Dept Phys, RA-1429 Buenos Aires, DF, Argentina. Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina. Univ Rivadavia, RA-1078 Buenos Aires, DF, Argentina. Univ Favaloro, RA-1078 Buenos Aires, DF, Argentina. RP Goity, JL (reprint author), Hampton Univ, Dept Phys, Hampton, VA 23668 USA. NR 35 TC 10 Z9 10 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 10 PY 2007 VL 99 IS 6 AR 062002 DI 10.1103/PhysRevLett.99.062002 PG 4 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700011 PM 17930816 ER PT J AU Li, Q Hucker, M Gu, GD Tsvelik, AM Tranquada, JM AF Li, Q. Huecker, M. Gu, G. D. Tsvelik, A. M. Tranquada, J. M. TI Two-dimensional superconducting fluctuations in stripe-ordered La1.875Ba0.125CuO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID LA2-XBAXCUO4; LA2-XSRXCUO4; TRANSPORT; CUPRATE; SYSTEMS; STATE; FILMS AB Recent spectroscopic observations of a d-wave-like gap in stripe-ordered La2-xBaxCuO4 with x=1/8have led us to critically analyze the anisotropic transport and magnetization properties of this material. The data suggest that concomitant with the spin ordering is an electronic decoupling of the CuO2 planes. We observe a transition (or crossover) to a state of two-dimensional (2D) fluctuating superconductivity, which eventually reaches a 2D superconducting state below a Berezinskii-Kosterlitz-Thouless transition. Thus, it appears that the stripe order in La2-xBaxCuO4 frustrates three-dimensional superconducting phase order, but is fully compatible with 2D superconductivity and an enhanced T-c. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Li, Q (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Tranquada, John/A-9832-2009; Gu, Genda/D-5410-2013 OI Tranquada, John/0000-0003-4984-8857; Gu, Genda/0000-0002-9886-3255 NR 26 TC 164 Z9 164 U1 5 U2 37 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 AUG 10 PY 2007 VL 99 IS 6 AR 067001 DI 10.1103/PhysRevLett.99.067001 PG 4 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700050 PM 17930855 ER PT J AU Silbert, LE Grest, GS Brewster, R Levine, AJ AF Silbert, Leonardo E. Grest, Gary S. Brewster, Robert Levine, Alex J. TI Rheology and contact lifetimes in dense granular flows SO PHYSICAL REVIEW LETTERS LA English DT Article ID INCLINED PLANE; CHUTE FLOWS; MODEL AB We study the rheology and distribution of interparticle contact lifetimes for gravity-driven, dense granular flows of noncohesive particles down an inclined plane using large-scale, three dimensional, granular dynamics simulations. Rather than observing a large number of long-lived contacts as might be expected for dense flows, brief binary collisions predominate. In the hard-particle limit, the rheology conforms to Bagnold scaling, where the shear stress is quadratic in the strain rate. As the particles are made softer, however, we find significant deviations from Bagnold rheology; the material flows more like a viscous fluid. We attribute this change in the collective rheology of the material to subtle changes in the contact lifetime distribution involving the increasing lifetime and number of the long-lived contacts in the softer particle systems. C1 So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA. RP Silbert, LE (reprint author), So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA. NR 35 TC 40 Z9 40 U1 0 U2 12 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 10 PY 2007 VL 99 IS 6 AR 068002 DI 10.1103/PhysRevLett.99.068002 PG 4 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700062 PM 17930867 ER PT J AU Yayon, Y Brar, VW Senapati, L Erwin, SC Crommie, MF AF Yayon, Y. Brar, V. W. Senapati, L. Erwin, S. C. Crommie, M. F. TI Observing spin polarization of individual magnetic adatoms SO PHYSICAL REVIEW LETTERS LA English DT Article ID SINGLE; SPECTROSCOPY; ATOM; MICROSCOPY; RESONANCE; COBALT AB We have used spin-polarized scanning tunneling spectroscopy to observe the spin polarization state of individual Fe and Cr atoms adsorbed onto Co nanoislands. These magnetic adatoms exhibit stationary out-of-plane spin polarization, but have opposite sign of the exchange coupling between electron states of the adatom and the Co island surface state: Fe adatoms exhibit parallel spin polarization to the Co surface state while Cr adatoms exhibit antiparallel spin polarization. First-principles calculations predict ferromagnetic and antiferromagnetic alignment of the spin moment for individual Fe and Cr adatoms on a Co film, respectively, implying negative spin polarization for Fe and Cr adatoms over the energy range of the Co surface state. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. USN, Res Lab, Ctr Computat Mat Sci, Washington, DC 20375 USA. RP Yayon, Y (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. RI Erwin, Steven/B-1850-2009 NR 26 TC 63 Z9 64 U1 2 U2 15 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 AUG 10 PY 2007 VL 99 IS 6 AR 067202 DI 10.1103/PhysRevLett.99.067202 PG 4 WC Physics, Multidisciplinary SC Physics GA 198YZ UT WOS:000248664700059 PM 17930864 ER PT J AU Bucksbaum, PH AF Bucksbaum, Philip H. TI The future of attosecond Spectroscopy SO SCIENCE LA English DT Review ID HARMONIC-GENERATION; OPTICAL PULSES; LASER; COMPRESSION; IONIZATION; INTENSITY; GASES; FIELD AB Attoscience is the study of physical processes that occur in less than a fraction of a cycle of visible light, in times less than a quadrillionth of a second. The motion of electrons inside atoms and molecules that are undergoing photoionization or chemical change falls within this time scale, as does the plasma motion that causes the reflectivity of metals. The techniques to study motion on this scale are based on careful control of strong-field laser-atom interactions. These techniques and new research opportunities in attosecond spectroscopy are reviewed. C1 Stanford Univ, Stanford Linear Accelerator Ctr, PULSE, Menlo Pk, CA 94025 USA. RP Bucksbaum, PH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, PULSE, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM phb@slac.stanford.edu NR 18 TC 86 Z9 86 U1 3 U2 26 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA SN 0036-8075 J9 SCIENCE JI Science PD AUG 10 PY 2007 VL 317 IS 5839 BP 766 EP 769 DI 10.1126/science.1142135 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 198JN UT WOS:000248624500029 PM 17690285 ER PT J AU Spencer, RW Braswell, WD Christy, JR Hnilo, J AF Spencer, Roy W. Braswell, William D. Christy, John R. Hnilo, Justin TI Cloud and radiation budget changes associated with tropical intraseasonal oscillations SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID OCEAN ALGORITHM; ATMOSPHERE; SYSTEM; EARTH; TEMPERATURES; FEEDBACKS; MODEL AB We explore the daily evolution of tropical intraseasonal oscillations in satellite-observed tropospheric temperature, precipitation, radiative fluxes, and cloud properties. The warm/rainy phase of a composited average of fifteen oscillations is accompanied by a net reduction in radiative input into the ocean-atmosphere system, with longwave heating anomalies transitioning to longwave cooling during the rainy phase. The increase in longwave cooling is traced to decreasing coverage by ice clouds, potentially supporting Lindzen's '' infrared iris '' hypothesis of climate stabilization. These observations should be considered in the testing of cloud parameterizations in climate models, which remain sources of substantial uncertainty in global warming prediction. C1 Univ Alabama, Ctr Earth Syst Sci, Huntsville, AL 35801 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Spencer, RW (reprint author), Univ Alabama, Ctr Earth Syst Sci, 320 Sparkman Dr, Huntsville, AL 35801 USA. EM roy.spencer@nsstc.uah.edu NR 18 TC 28 Z9 29 U1 0 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD AUG 9 PY 2007 VL 34 IS 15 AR L15707 DI 10.1029/2007GL029698 PG 5 WC Geosciences, Multidisciplinary SC Geology GA 201ZS UT WOS:000248871800003 ER PT J AU Peterka, DS Kim, JH Wang, CC Poisson, L Neumark, DM AF Peterka, Darcy S. Kim, Jeong Hyun Wang, Chia C. Poisson, Lionel Neumark, Daniel M. TI Photoionization dynamics in pure helium droplets SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID ELECTRON SURFACE-STATES; IONIZED HE-4 CLUSTERS; AB-INITIO CALCULATIONS; LIQUID-HELIUM; EXCESS ELECTRON; SUPERFLUID-HELIUM; CHARGED CORES; PHOTOELECTRON-SPECTROSCOPY; RYDBERG STATES; FRAGMENTATION AB The photoionization and photoelectron spectroscopy of pure He droplets were investigated at photon energies between 24.6 eV (the ionization energy of He) and 28.0 eV. Time-of-flight mass spectra and photoelectron images were obtained at a series of molecular beam source temperatures and pressures to assess the effect of droplet size on the photoionization dynamics. At source temperatures below 16 K, where there is significant production of clusters with more than 10(4) atoms, the photoelectron images are dominated by fast electrons produced via direct ionization, with a small contribution from very slow electrons with kinetic energies below 1 meV arising from an indirect mechanism. The fast photoelectrons from the droplets have as much as 0.5 eV more kinetic energy than those from atomic He at the same photon energy. This result is interpreted and simulated within the context of a "dimer model", in which one assumes vertical ionization from two nearest-neighbor He atoms to the attractive region of the He-2(+) potential energy curve. Possible mechanisms for the slow electrons, which were also seen at energies below IE(He), are discussed, including vibrational autoionizaton of Rydberg states comprising an electron weakly bound to the surface of a large He-N(+) core. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. RP Neumark, DM (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM dneumark@berkeley.edu RI POISSON, Lionel/A-6669-2008; Neumark, Daniel/B-9551-2009 OI POISSON, Lionel/0000-0002-7131-968X; Neumark, Daniel/0000-0002-3762-9473 NR 80 TC 26 Z9 26 U1 0 U2 14 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 9 PY 2007 VL 111 IS 31 BP 7449 EP 7459 DI 10.1021/jp0710032 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 196JX UT WOS:000248478700025 PM 17571863 ER PT J AU Slipchenko, MN Sartakov, BG Vilesov, AF Xantheas, SS AF Slipchenko, Mikhail N. Sartakov, Boris G. Vilesov, Andrey F. Xantheas, Sotiris S. TI Study of NH stretching vibrations in small ammonia clusters by infrared spectroscopy in he droplets and ab initio Calculations SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID ROTATION-TUNNELING STATES; HIGHER-DERIVATIVE METHODS; 3 MU-M; WATER CLUSTERS; LIQUID-HELIUM; DOUBLE-RESONANCE; HIGH-RESOLUTION; BASIS-SETS; INTERACTION ENERGY; OSCILLATOR MODEL AB Infrared spectra of the NH stretching vibrations of (NH3)(n) clusters (n = 2-4) have been obtained using the helium droplet isolation technique and first principles electronic structure anharmonic calculations. The measured spectra exhibit well-resolved bands, which have been assigned to the nu(1), nu(3), and 2 nu(4) modes of the ammonia fragments in the clusters. The formation of a hydrogen bond in ammonia dimers leads to an increase of the infrared intensity by about a factor of 4. In the larger clusters the infrared intensity per hydrogen bond is close to that found in dimers and approaches the value in the NH3 crystal. The intensity of the 2 nu(4) overtone band in the trimer and tetramer increases by a factor of 10 relative to that in the monomer and dimer, and is comparable to the intensity of the nu(1) and nu(3) fundamental bands in larger clusters. This indicates the onset of the strong anharmonic coupling of the 2 nu(4) and nu(1) modes in larger clusters. The experimental assignments are compared to the ones obtained from first principles electronic structure anharmonic calculations for the dimer and trimer clusters. The anharmonic calculations were performed at the Moller-Plesset (MP2) level of electronic structure theory and were based on a second-order perturbative evaluation of rovibrational parameters and their effects on the vibrational spectra and average structures. In general, there is excellent (< 20 cm(-1)) agreement between the experimentally measured band origins for the N-H stretching frequencies and the calculated anharmonic vibrational frequencies. However, the calculations were found to overestimate the infrared intensities in clusters by about a factor of 4. C1 Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA. Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA. RP Vilesov, AF (reprint author), Univ So Calif, Dept Chem, Los Angeles, CA 90089 USA. RI Xantheas, Sotiris/L-1239-2015; OI Xantheas, Sotiris/0000-0002-6303-1037 NR 91 TC 31 Z9 31 U1 0 U2 22 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 9 PY 2007 VL 111 IS 31 BP 7460 EP 7471 DI 10.1021/jp071279+ PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 196JX UT WOS:000248478700026 PM 17530831 ER PT J AU Cui, LF Lin, YC Sundholm, D Wang, LS AF Cui, Li-Feng Lin, Ying-Chan Sundholm, Dage Wang, Lai-Sheng TI A photoelectron spectroscopic and computational study of sodium auride clusters, NanAun- (n=1-3) SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID TRANSITION-METAL CLUSTERS; ELECTRONIC-STRUCTURE; GOLD COMPOUNDS; CSAU; MOLECULES; CHEMISTRY; ALLOYS; DERIVATIVES; ELEMENTS; RI-MP2 AB Negatively charged sodium auride clusters, NanAun- (n = 1-3), have been investigated experimentally using photoelectron spectroscopy and ab initio calculations. Well-resolved electronic transitions were observed in the photoelectron spectra of NanAun- (n = 1-3) at several photon energies. Very large band gaps were observed in the photoelectron spectra of the anion clusters, indicating that the corresponding neutral clusters are stable closed-shell species. Calculations show that the global minimum of Na2Au2- is a quasi-linear species with C-s symmetry. A planar isomer of D-2h symmetry is found to be 0.137 eV higher in energy. The two lowest energy isomers of Na3Au3- consist of three-dimensional structures of C-s symmetry. The global minimum of Na3Au3- has a bent-flake structure lying 0.077 eV below a more compact structure. The global minima of the sodium auride clusters are confirmed by the good agreement between the calculated electron detachment energies of the anions and the measured photoelectron spectra. The global minima of neutral Na2Au2 and Na3Au3 are found to possess higher symmetries with a planar four-membered ring (D-2h) and a six-membered ring (D-3h) structure, respectively. The chemical bonding in the sodium auride clusters is found to be highly ionic with Au acting as the electron acceptor. C1 Univ Helsinki, Dept Chem, FIN-00014 Helsinki, Finland. Washington State Univ, Dept Phys, Richland, WA 99354 USA. Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99354 USA. RP Sundholm, D (reprint author), Univ Helsinki, Dept Chem, POB 55, FIN-00014 Helsinki, Finland. EM sundholm@chem.helsinki.fi; Is.wang@pnl.gov NR 54 TC 12 Z9 12 U1 2 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 9 PY 2007 VL 111 IS 31 BP 7555 EP 7561 DI 10.1021/jp0703511 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 196JX UT WOS:000248478700037 PM 17489566 ER PT J AU Belau, L Wilson, KR Leone, SR Ahmed, M AF Belau, Leonid Wilson, Kevin R. Leone, Stephen R. Ahmed, Musahid TI Vacuum-ultraviolet photoionization studies of the microhydration of DNA bases (Guanine, cytosine, adenine, and Thymine) SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID NUCLEIC-ACID BASES; DOUBLE-RESONANCE SPECTROSCOPY; IONIZATION-ENERGY THRESHOLDS; CORRELATED AB-INITIO; GAS-PHASE; AQUEOUS-SOLUTION; WATER CLUSTERS; 2-COLOR PHOTOIONIZATION; RARE TAUTOMERS; RNA BASES AB In this work, we report on a photoionization study of the microhydration of the four DNA bases. Gas-phase clusters of water with DNA bases [guanine (G), cytosine (C), adenine (A), and thymine (T)] are generated via thermal vaporization of the bases and expansion of the resultant vapor in a continuous supersonic jet expansion of water seeded in Ar. The resulting clusters are investigated by single-photon ionization with tunable vacuum-ultraviolet synchrotron radiation and mass analyzed using reflectron mass spectrometry. Photoionization efficiency (PIE) curves are recorded for the DNA bases and the following water (W) clusters: G, GW(n) (n = 1-3); C, CWn (n = 1-3); A, AW(n) (n = 1,2); and T, TWn (n = 1-3). Appearance energies (AE) are derived from the onset of these PIE curves (all energies in eV): G (8.1 +/- 0.1), GW (8.0 +/- 0.1), GW(2) (8.0 +/- 0.1), and GW(3) (8.0); C (8.65 +/- 0.05), CW (8.45 +/- 0.05), CW2 (8.4 +/- 0.1), and CW3 (8.3 +/- 0.1); A (8.30 +/- 0.05), AW (8.20 +/- 0.05), and AW(2) (8.1 +/- 0.1); T (8.90 +/- 0.05); and TW (8.75 +/- 0.05), TW2 (8.6 +/- 0.1), and TW3 (8.6 +/- 0.1). The AEs of the DNA bases decrease slightly with the addition of water molecules (up to three) but do not converge to values found for photoinduced electron removal from DNA bases in solution. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem & Phys, Berkeley, CA 94720 USA. RP Ahmed, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. EM MAhmed@lbl.gov RI Ahmed, Musahid/A-8733-2009 NR 44 TC 62 Z9 62 U1 2 U2 33 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 9 PY 2007 VL 111 IS 31 BP 7562 EP 7568 DI 10.1021/jp0705929 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 196JX UT WOS:000248478700038 PM 17419600 ER PT J AU Taatjes, CA Gijsbertsen, A de Lange, MJL Stolte, S AF Taatjes, Craig A. Gijsbertsen, Arjan de lange, Marc J. L. Stolte, Steven TI Measurements and quasi-quantum modeling of the steric asymmetry and parity propensities in state-to-state rotationally inelastic scattering of NO ((2)Pi(1/2)) with D-2 SO JOURNAL OF PHYSICAL CHEMISTRY A LA English DT Article ID DIFFERENTIAL CROSS-SECTIONS; FINE-STRUCTURE TRANSITIONS; POTENTIAL-ENERGY SURFACES; ATOM-MOLECULE COLLISIONS; KINETIC-THEORY MODEL; REACTIVE COLLISIONS; AR COLLISIONS; HE; (2)PI); GAS AB Relative integrated cross sections are measured for spin-orbit-conserving, rotationally inelastic scattering of NO ((2)Pi(1/2)), hexapole-selected in the upper Lambda-doublet level of the ground rotational state (j = 0.5), in collisions with D-2 at a nominal energy of 551 cm(-1). The final state of the NO molecule is detected by laser-induced fluorescence (LIF). The state-selected NO molecule is oriented with either the N end or the O end toward the incoming D-2 molecule by application of a static electric field E in the scattering region. This field is directed parallel or antiparallel to the relative velocity vector v. Comparison of signals taken for the different applied field directions gives the experimental steric asymmetry SA, defined by SA = (sigma(v up arrow down arrow E) - sigma(v up arrow up arrow E))/(sigma(v up arrow down arrow E) + sigma(v up arrow up arrow E)), which is equal to within a factor of -1 to the molecular steric effect, S-i -> f equivalent to (sigma(D2 -> NO) - sigma(D2 -> ON))/(sigma(D2 -> NO) + sigma(D2 -> ON)). The dependence of the integral inelastic cross section on the incoming Lambda-doublet component is also measured as a function of the final rotational (j(final)) and Lambda-doublet (epsilon(final)) state. The measured steric asymmetries are similar to those previously observed for NO-He scattering. Spin-orbit manifold-conserving collisions exhibit a larger propensity for parity conservation than their NO-He counterparts. The results are interpreted in the context of the recently developed quasi-quantum treatment (QQT) of rotationally inelastic scattering [Gijsbertsen, A.; Linnartz, H.; Taatjes, C. A.; Stolte, S. J. Am. Chem. Soc.2006, 128, 8777]. The QQT predictions can be inverted to obtain a fitted hard-shell potential that reproduces the experimental steric asymmetry; this fitted potential gives an empirical estimate of the anisotropy of the repulsive interaction between NO and D-2. QQT computation of the differential cross section using this simple model potential shows reasonable agreement with the measured differential cross sections. C1 Vrije Univ Amsterdam, Dept Phys Chem, Fac Exact Sci, NL-1081 HV Amsterdam, Netherlands. Vrije Univ Amsterdam, Fac Exact Sci, Ctr Laser, NL-1081 HV Amsterdam, Netherlands. Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. FOM, Inst Atom & Mol Phys, NL-1098 SJ Amsterdam, Netherlands. RP Stolte, S (reprint author), Vrije Univ Amsterdam, Dept Phys Chem, Fac Exact Sci, De Boelelaan 1083, NL-1081 HV Amsterdam, Netherlands. EM stolte@few.vu.nl NR 36 TC 22 Z9 22 U1 0 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1089-5639 J9 J PHYS CHEM A JI J. Phys. Chem. A PD AUG 9 PY 2007 VL 111 IS 31 BP 7631 EP 7639 DI 10.1021/jp0712405 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 196JX UT WOS:000248478700046 PM 17542569 ER PT J AU Pitchimani, R Burnham, AK Weeks, BL AF Pitchimani, Rajasekar Burnham, Alan K. Weeks, Brandon L. TI Quantitative thermodynamic analysis of sublimation rates using an atomic force microscope SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID PENTAERYTHRITOL TETRANITRATE; THERMAL-ANALYSIS; THERMOGRAVIMETRY; NANOSCALE; EVOLUTION; GROWTH; AFM AB Atomic force microscopy (AFM) has been successfully used to study the activation energy for evaporation of pentaerythritol tetranitrate (PETN) nanoislands formed by spin coating. These islands are annealed isothermally in the temperature range of 30-70 degrees C for a given time and are scanned with AFM in contact mode at room temperature. The volume of these islands does not change significantly up to about 35-40 degrees C indicating that sublimation is not significant below 40 degrees C. Above 40 degrees C, the islands start shrinking, and the rate of weight loss is analyzed as a function of temperature. The activation energy of evaporation using AFM was found to be similar to that for bulk PETN crystals using thermogravimetric analysis (TGA) at higher temperatures (110-135 degrees C). These results demonstrate that AFM is a useful tool to measure thermodynamic properties with a nanoscale probe. C1 Texas Tech Univ, Lubbock, TX 79409 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Pitchimani, R (reprint author), Texas Tech Univ, Lubbock, TX 79409 USA. EM pitchimani.rajasekar@ttu.edu RI Weeks, Brandon/P-6331-2014 OI Weeks, Brandon/0000-0003-2552-4129 NR 19 TC 19 Z9 19 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 9 PY 2007 VL 111 IS 31 BP 9182 EP 9185 DI 10.1021/jp073516e PG 4 WC Chemistry, Physical SC Chemistry GA 196KK UT WOS:000248480100002 PM 17630792 ER PT J AU Ashbaugh, HS Pratt, LR AF Ashbaugh, Henry S. Pratt, Lawrence R. TI Contrasting nonaqueous against aqueous solvation on the basis of scaled-particle theory SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID TEMPERATURE-DEPENDENCE; HYDROPHOBIC HYDRATION; MOLECULAR-DYNAMICS; WATER-STRUCTURE; NONPOLAR GASES; HEAT-CAPACITY; N-HEXANE; SOLUBILITY; THERMODYNAMICS; SOLUTES AB Normal hexane is adopted as a typical organic solvent for comparison with liquid water in modern theories of hydrophobic hydration, and detailed results are worked-out here for the C-atom density in contact with a hard-sphere solute, rho(C)G(R), for the full range of solute radii. The intramolecular structure of an n-hexane molecule introduces qualitative changes in G(R) compared to scaled-particle models for liquid water. Also worked-out is a revised scaled-particle model implemented with molecular simulation results for liquid n-hexane. The classic scaled-particle model, acknowledging the intramolecular structure of an n-hexane molecule, is in qualitative agreement with the revised scaled-particle model results, and is consistent in sizing the methyl/methylene sites which compose n-hexane in the simulation model. The classic and revised scaled-particle models disagree for length scales greater than the radius of a methyl group, however. The liquid-vapor surface tension of n-hexane predicted by the classic scaled-particle model is too large, though the temperature variation is reasonable; this contrasts with the classic scaled-particle theory for water which predicts a reasonable magnitude of the water liquid-vapor surface tension, but an incorrect sign for the temperature derivative at moderate temperatures. Judging on the basis of the arbitrary condition that drying is indicated when G(R) < 1, hard spheres dry at smaller sizes in n-hexane than in liquid water. C1 Tulane Univ, Dept Chem & Biomol Engn, New Orleans, LA 70118 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Ashbaugh, HS (reprint author), Tulane Univ, Dept Chem & Biomol Engn, New Orleans, LA 70118 USA. EM hanka@tulane.edu RI Pratt, Lawrence/H-7955-2012; Ashbaugh, Henry/C-9767-2011 OI Pratt, Lawrence/0000-0003-2351-7451; NR 46 TC 28 Z9 28 U1 1 U2 22 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 9 PY 2007 VL 111 IS 31 BP 9330 EP 9336 DI 10.1021/jp071969d PG 7 WC Chemistry, Physical SC Chemistry GA 196KK UT WOS:000248480100022 PM 17636979 ER PT J AU Soujon, D Becker, K Rogach, AL Feldmann, J Weller, H Talapin, DV Lupton, JM AF Soujon, Daniel Becker, Klaus Rogach, Andrey L. Feldmann, Jochen Weller, Horst Talapin, Dmitri V. Lupton, John M. TI Time-resolved Forster energy transfer from individual semiconductor nanoantennae to single dye molecules SO JOURNAL OF PHYSICAL CHEMISTRY C LA English DT Article ID QUANTUM DOTS; NANOCRYSTALS; DONORS; FRET; SPECTROSCOPY; MICROSCOPY; EXCITATION; POLYMERS; DNA AB Single semiconductor nanocrystals can be used as nanoscale optical antennae to photoexcite individual dye molecules in an ensemble via Forster energy transfer. Energy transfer on the microscopic level between a single donor and acceptor depends on the individual spectral overlap of absorption and emission of the single entities as well as on their spatial separation. We recently demonstrated how the spectral overlap between a single donor and a single acceptor can be tuned electrically using the Stark effect. Here, we investigate the effect of the average donor-acceptor spacing on the time-resolved fluorescence dynamics of single donor-acceptor pairs. The single nanocrystal donor luminescence is completely quenched for an average intermolecular separation of the dye of 9 nm. As the dye acceptor concentration decreases, both the number of donors observed and the average donor intensity increase due to an increase in nanocrystal fluorescence lifetime. At the same time, a temporal rise in the acceptor luminescence becomes discernible. The scatter in donor lifetimes observed increases with increasing acceptor concentration and is attributed to spatial disorder controlling the microscopic energy transfer rates. C1 Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA. Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA. Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany. Univ Munich, Photon & Optoelect Grp, Dept Phys, D-80799 Munich, Germany. Univ Munich, CeNS, D-80799 Munich, Germany. RP Lupton, JM (reprint author), Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA. EM lupton@physics.utah.edu RI Weller, Horst/B-5715-2014 NR 29 TC 17 Z9 17 U1 0 U2 24 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1932-7447 J9 J PHYS CHEM C JI J. Phys. Chem. C PD AUG 9 PY 2007 VL 111 IS 31 BP 11511 EP 11515 DI 10.1021/jp073556i PG 5 WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 196LF UT WOS:000248482300003 ER PT J AU Chapman, HN Hau-Riege, SP Bogan, MJ Bajt, S Barty, A Boutet, S Marchesini, S Frank, M Woods, BW Benner, WH London, RA Rohner, U Szoke, A Spiller, E Moller, T Bostedt, C Shapiro, DA Kuhlmann, M Treusch, R Plonjes, E Burmeister, F Bergh, M Caleman, C Huldt, G Seibert, MM Hajdu, J AF Chapman, Henry N. Hau-Riege, Stefan P. Bogan, Michael J. Bajt, Sasa Barty, Anton Boutet, Sebastien Marchesini, Stefano Frank, Matthias Woods, Bruce W. Benner, W. Henry London, Richard A. Rohner, Urs Szoeke, Abraham Spiller, Eberhard Moeller, Thomas Bostedt, Christoph Shapiro, David A. Kuhlmann, Marion Treusch, Rolf Ploenjes, Elke Burmeister, Florian Bergh, Magnus Caleman, Carl Huldt, Goesta Seibert, M. Marvin Hajdu, Janos TI Femtosecond time-delay X-ray holography SO NATURE LA English DT Article ID FREE-ELECTRON LASER; PULSES; GENERATION; LIGHT; SCATTERING; RADIATION; DYNAMICS AB Extremely intense and ultrafast X-ray pulses from free-electron lasers offer unique opportunities to study fundamental aspects of complex transient phenomena in materials. Ultrafast time-resolved methods usually require highly synchronized pulses to initiate a transition and then probe it after a precisely defined time delay. In the X-ray regime, these methods are challenging because they require complex optical systems and diagnostics. Here we propose and apply a simple holographic measurement scheme, inspired by Newton's 'dusty mirror' experiment(1), to monitor the X-ray-induced explosion of microscopic objects. The sample is placed near an X-ray mirror; after the pulse traverses the sample, triggering the reaction, it is reflected back onto the sample by the mirror to probe this reaction. The delay is encoded in the resulting diffraction pattern to an accuracy of one femtosecond, and the structural change is holographically recorded with high resolution. We apply the technique to monitor the dynamics of polystyrene spheres in intense free-electron-laser pulses, and observe an explosion occurring well after the initial pulse. Our results support the notion that X-ray flash imaging(2,3) can be used to achieve high resolution, beyond radiation damage limits for biological samples(4). With upcoming ultrafast X-ray sources we will be able to explore the three-dimensional dynamics of materials at the time-scale of atomic motion. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Davis, Ctr Biophoton Sci & Technol, Sacramento, CA 95817 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. Uppsala Univ, Dept Cell & Mol Biol, Lab Mol Biophys, SE-75124 Uppsala, Sweden. Tech Univ Berlin, Inst Opt & Atomare Phys, D-10623 Berlin, Germany. DESY, D-22607 Hamburg, Germany. RP Chapman, HN (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM henry.chapman@llnl.gov RI Marchesini, Stefano/A-6795-2009; Chapman, Henry/G-2153-2010; Bajt, Sasa/G-2228-2010; Bogan, Mike/I-6962-2012; Barty, Anton/K-5137-2014; Frank, Matthias/O-9055-2014; Treusch, Rolf/C-3935-2015; OI Chapman, Henry/0000-0002-4655-1743; Bogan, Mike/0000-0001-9318-3333; Barty, Anton/0000-0003-4751-2727; Treusch, Rolf/0000-0001-8479-8862 NR 32 TC 165 Z9 165 U1 7 U2 57 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 9 PY 2007 VL 448 IS 7154 BP 676 EP 679 DI 10.1038/nature06049 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 197ZY UT WOS:000248598000040 PM 17687320 ER PT J AU Janssen, BJC Read, RJ Brunger, AT Gros, P AF Janssen, Bert J. C. Read, Randy J. Bruenger, Axel T. Gros, Piet TI Crystallography - Crystallographic evidence for deviating C3b structure? SO NATURE LA English DT Letter ID COMPLEMENT ACTIVATION; CRYSTAL-STRUCTURES; INSIGHTS C1 Univ Utrecht, Fac Sci, Bijvoet Ctr Biomol Res, NL-3584 CH Utrecht, Netherlands. Univ Cambridge, Cambridge Inst Med Res, Dept Haematol, Cambridge CB2 0XY, England. Stanford Univ, Dept Cellular & Mol Physiol, Stanford, CA 94305 USA. Stanford Univ, Dept Neurol & Neurol Sci, Stanford, CA 94305 USA. Stanford Univ, Dept Biol Struct, Stanford, CA 94305 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Stanford, CA 94305 USA. RP Janssen, BJC (reprint author), Univ Utrecht, Fac Sci, Bijvoet Ctr Biomol Res, NL-3584 CH Utrecht, Netherlands. EM p.gros@chem.uu.nl RI Read, Randy/L-1418-2013; Janssen, Bert/I-3338-2016; Gros, Piet/I-5569-2016; OI Read, Randy/0000-0001-8273-0047; Gros, Piet/0000-0002-7782-2585; Brunger, Axel/0000-0001-5121-2036 FU Wellcome Trust [050211] NR 13 TC 21 Z9 22 U1 0 U2 9 PU NATURE PUBLISHING GROUP PI LONDON PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND SN 0028-0836 J9 NATURE JI Nature PD AUG 9 PY 2007 VL 448 IS 7154 BP E1 EP E2 DI 10.1038/nature06102 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 197ZY UT WOS:000248598000035 PM 17687277 ER PT J AU Yoon, SS Karabulut, AC Lipscomb, JD Hennigan, RF Lymar, SV Groce, SL Herr, AB Howell, ML Kiley, PJ Schurr, MJ Gaston, B Choi, KH Schweizer, HP Hassett, DJ AF Yoon, Sang Sun Karabulut, Ahmet C. Lipscomb, John D. Hennigan, Robert F. Lymar, Sergei V. Groce, Stephanie L. Herr, Andrew B. Howell, Michael L. Kiley, Patricia J. Schurr, Michael J. Gaston, Benjamin Choi, Kyoung-Hee Schweizer, Herbert P. Hassett, Daniel J. TI Two-pronged survival strategy for the major cystic fibrosis pathogen, Pseudomonas aeruginosa, lacking the capacity to degrade nitric oxide during anaerobic respiration SO EMBO JOURNAL LA English DT Article DE anaerobic nitrate regulator (ANR); anaerobic respiration; biofilms; nitric oxide; Pseudomonas aeruginosa ID ESCHERICHIA-COLI; HYDROGEN-PEROXIDE; PROTOCATECHUATE 4,5-DIOXYGENASE; EXTRADIOL DIOXYGENASES; AZOTOBACTER-VINELANDII; FUNCTIONAL-ANALYSIS; REACTIVE OXYGEN; STRESS-RESPONSE; REGULATOR ANR; FNR PROTEIN AB Protection from NO gas, a toxic byproduct of anaerobic respiration in Pseudomonas aeruginosa, is mediated by nitric oxide (NO) reductase (NOR), the norCB gene product. Nevertheless, a norCB mutant that accumulated similar to 13.6 mu M NO paradoxically survived anaerobic growth. Transcription of genes encoding nitrate and nitrite reductases, the enzymes responsible for NO production, was reduced > 50- and 2.5-fold in the norCB mutant. This was due, in part, to a predicted compromise of the [4Fe-4S](2+) cluster in the anaerobic regulator ANR by physiological NO levels, resulting in an inability to bind to its cognate promoter DNA sequences. Remarkably, two O-2-dependent dioxygenases, (h) under baro (m) under baro (g) under bar entisate-1,2-dioxygenase (HmgA) and 4- (h) under bar ydroxyphenyl (p) under bar yruvate (d) under bar ioxygenase (Hpd), were derepressed in the norCB mutant. Electron paramagnetic resonance studies showed that HmgA and Hpd bound NO avidly, and helped protect the norCB mutant in anaerobic biofilms. These data suggest that protection of a P. aeruginosa norCB mutant against anaerobic NO toxicity occurs by both control of NO supply and reassignment of metabolic enzymes to the task of NO sequestration. C1 Univ Cincinnati, Coll Med, Dept Mol Genet Biochem & Microbiol, Cincinnati, OH 45267 USA. Univ Minnesota, Sch Med, Dept Biochem Mol Biol & Biophys, Minneapolis, MN USA. Univ Cincinnati, Coll Med, Dept Cell Biol, Cincinnati, OH USA. Brookhaven Natl Lab, Dept Chem, Upton, NY USA. Univ Wisconsin, Dept Biomol Chem, Madison, WI USA. Tulane Univ, Dept Microbiol & Immunol, New Orleans, LA USA. Univ Virginia, Sch Med, Div Pediat Resp Dis, Dept Pediat, Charlottesville, VA USA. Colorado State Univ, Dept Microbiol & Immunol & Pathol, Ft Collins, CO USA. RP Hassett, DJ (reprint author), Univ Cincinnati, Coll Med, Dept Mol Genet Biochem & Microbiol, 231 Albert Sabin Way, Cincinnati, OH 45267 USA. EM Daniel.Hassett@UC.Edu OI Herr, Andrew/0000-0002-3598-3399; Lipscomb, John/0000-0002-8158-5594 FU NIAID NIH HHS [R03 AI053079, AI-53079, R01 AI050812-05]; NIGMS NIH HHS [GM-24689, R01 GM024689, R37 GM024689] NR 73 TC 35 Z9 35 U1 2 U2 10 PU NATURE PUBLISHING GROUP PI NEW YORK PA 75 VARICK STREET, 9TH FLOOR, NEW YORK, NY 10013-1917 USA SN 0261-4189 J9 EMBO J JI Embo J. PD AUG 8 PY 2007 VL 26 IS 15 BP 3662 EP 3672 DI 10.1038/sj.emboj.7601787 PG 11 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 199DI UT WOS:000248676000014 PM 17627281 ER PT J AU Steiner, AL Tonse, S Cohen, RC Goldstein, AH Harley, RA AF Steiner, Allison L. Tonse, Shaheen Cohen, Ronald C. Goldstein, Allen H. Harley, Robert A. TI Biogenic 2-methyl-3-buten-2-ol increases regional ozone and HOx sources SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID VOLATILE ORGANIC-COMPOUNDS; PONDEROSA PINE PLANTATION; SIERRA-NEVADA; EMISSIONS; FLUXES; MODEL; FOREST; TEMPERATURE; TROPOSPHERE; ENVIRONMENT AB We present the first regional-scale chemistry simulation investigating the effects of biogenic 2-methyl-3-buten-2-ol (MBO) emissions on air quality. In a central California model domain, MBO emissions have a distinctly different regional pattern than isoprene but have similar daily maxima of about 5 mg m(-2) hr(-1). MBO oxidation causes an increase in ozone, formaldehyde, acetone and consequently hydrogen radical production (PHOx). The addition of MBO increases the daily maximum ozone as much as 3 ppb near source regions (2-5% in rural areas) and as much as 1 ppb in the Central Valley. Formaldehyde concentrations increase by as much as 1 ppb (40%) over the Sierra Nevada Mountains, increasing the production of HOx by 10-20% and accelerating local chemistry. This indicates that inclusion of MBO and other biogenic oxygenated emissions in regional simulations in the western and southeastern United States is essential for accurate representation of ozone and HOx. C1 Univ Calif Berkeley, Dept Environm Sci Policy & Management, Div Ecosyst Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA USA. RP Steiner, AL (reprint author), Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA. EM alsteiner@umich.edu RI Cohen, Ronald/A-8842-2011; Goldstein, Allen/A-6857-2011; Steiner, Allison/F-4942-2011; Harley, Robert/C-9177-2016 OI Cohen, Ronald/0000-0001-6617-7691; Goldstein, Allen/0000-0003-4014-4896; Harley, Robert/0000-0002-0559-1917 NR 31 TC 19 Z9 19 U1 2 U2 13 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD AUG 8 PY 2007 VL 34 IS 15 AR L15806 DI 10.1029/2007GL030802 PG 6 WC Geosciences, Multidisciplinary SC Geology GA 201ZQ UT WOS:000248871600004 ER PT J AU Freeland, JW Kavich, JJ Gray, KE Ozyuzer, L Zheng, H Mitchell, JF Warusawithana, MP Ryan, P Zhai, X Kodama, RH Eckstein, JN AF Freeland, J. W. Kavich, J. J. Gray, K. E. Ozyuzer, L. Zheng, H. Mitchell, J. F. Warusawithana, M. P. Ryan, P. Zhai, X. Kodama, R. H. Eckstein, J. N. TI Suppressed magnetization at the surfaces and interfaces of ferromagnetic metallic manganites SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID MOLECULAR-BEAM EPITAXY; RAMP-EDGE JUNCTIONS; SPIN POLARIZATION; COLOSSAL MAGNETORESISTANCE; OXIDES; MAGNETOOPTICS; PEROVSKITES; SEGREGATION; MULTILAYERS; REFLECTION AB What happens to ferromagnetism at the surfaces and interfaces of manganites? With the competition between charge, spin, and orbital degrees of freedom, it is not surprising that the surface behaviour may be profoundly different to that of the bulk. Using a powerful combination of two surface probes, tunnelling and polarized x-ray interactions, this paper reviews our work on the nature of the electronic and magnetic states at manganite surfaces and interfaces. The general observation is that ferromagnetism is not the lowest energy state at the surface or interface, which results in a suppression or even loss of ferromagnetic order at the surface. Two cases will be discussed ranging from the surface of the quasi-2D bilayermanganite (La2-2xSr1+2xMn2O7) to the 3D perovskite (La2/3Sr1/3MnO3)/SrTiO3 interface. For the bilayer manganite, which is ferromagnetic and conducting in the bulk, these probes present clear evidence for an intrinsic insulating non-ferromagnetic surface layer atop adjacent subsurface layers that display the full bulk magnetization. This abrupt intrinsic magnetic interface is attributed to the weak inter-bilayer coupling native to these quasi-two-dimensional materials. This is in marked contrast to the situation for the non-layered manganite system (La2/3Sr1/3MnO3/SrTiO3), whose magnetization near the interface is less than half the bulk value at low temperatures and decreases with increasing temperature at a faster rate than that for the bulk. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Argonne Natl Lab, Div Sci Mat, Argonne, IL 60439 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Freeland, JW (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. EM freeland@anl.gov RI Ozyuzer, Lutfi/H-3142-2011 NR 44 TC 26 Z9 26 U1 2 U2 18 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 AUG 8 PY 2007 VL 19 IS 31 AR 315210 DI 10.1088/0953-8984/19/31/315210 PG 13 WC Physics, Condensed Matter SC Physics GA 192FH UT WOS:000248185700011 PM 21694110 ER PT J AU Tobin, JG Morton, SA Yu, SW Waddill, GD Schuller, IK Chambers, SA AF Tobin, J. G. Morton, S. A. Yu, S. W. Waddill, G. D. Schuller, I. K. Chambers, S. A. TI Spin resolved photoelectron spectroscopy of Fe3O4: the case against half-metallicity SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID MOLECULAR-BEAM EPITAXY; VERWEY TRANSITION; THIN-FILMS; POLARIZED PHOTOEMISSION; ELECTRONIC-STRUCTURE; SURFACE-STRUCTURE; MAGNETITE; RECONSTRUCTION; FERROMAGNETS; DIFFRACTION AB Many materials have been theoretically predicted to be half-metallic, and hence suitable for use as pure spin sources in spintronic devices. Yet to date, remarkably few of these predictions have been experimentally verified. We have used spin polarized photoelectron spectroscopy to study one candidate half-metallic system, Fe3O4. Such experiments are normally hampered by difficulties in producing clean stoichiometric surfaces with a polarization that is truly representative of that of the bulk. However, by utilizing higher photon energies than have traditionally been used for such experiments, we can study polarization in 'as received' samples, essentially 'looking through' the disrupted surface. High quality, strain relieved, ex situ prepared Fe3O4 films have been thoroughly characterized by diffraction, transport and magnetometry studies of their crystallographic, electronic and magnetic properties. The spectroscopic results are found to agree fairly closely with previously published experimental data on in situ grown thin films and cleaved single crystals. However, despite the higher photoelectron kinetic energies of the experiment, it has not been possible to observe 100% polarization at the Fermi level. Hence, our data do not support the claim of true half-metallicity for Fe3O4. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Missouri, Dept Phys, Rolla, MO 65409 USA. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Pacific NW Natl Lab, Richland, WA 99392 USA. RP Tobin, JG (reprint author), Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94550 USA. RI Tobin, James/O-6953-2015 NR 49 TC 40 Z9 40 U1 0 U2 11 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 8 PY 2007 VL 19 IS 31 AR 315218 DI 10.1088/0953-8984/19/31/315218 PG 22 WC Physics, Condensed Matter SC Physics GA 192FH UT WOS:000248185700019 PM 21694118 ER PT J AU Ventrice, CA Borst, DR Geisler, H van Ek, J Losovyj, YB Robbert, PS Diebold, U Rodriguez, JA Miao, GX Gupta, A AF Ventrice, C. A., Jr. Borst, D. R. Geisler, H. van Ek, J. Losovyj, Y. B. Robbert, P. S. Diebold, U. Rodriguez, J. A. Miao, G. X. Gupta, A. TI Are the surfaces of CrO2 metallic? SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID CHROMIUM-DIOXIDE; SPIN POLARIZATION; TUNNEL-JUNCTIONS; THIN-FILMS; MAGNETORESISTANCE; FERROMAGNET; MAGNETOTRANSPORT; FABRICATION; OVERLAYERS; FE3O4 AB Previous photoelectron spectroscopy studies of CrO2 have found either no density of states or a very low density of states at the Fermi level, suggesting that CrO2 is a semiconductor or a semi-metal. This is in contradiction to calculations that predict that CrO2 should be a half-metallic ferromagnet. Recently, techniques have been developed to grow high-quality epitaxial films of CrO2 on TiO2 substrates by chemical vapour deposition. We present photoelectron spectroscopy measurements of epitaxial CrO2(110)/TiO2(110) and CrO2(100)/TiO2(100) grown using a CrO3 precursor. In addition, measurements of epitaxial Cr2O3(0001)/Pt(111) films grown by thermal evaporation of Cr in an oxygen atmosphere are presented as a reference for reduced CrO2 films. The measurements of the CrO2 surfaces show no emission at the Fermi level after sputtering and annealing the surfaces in oxygen, even though our soft core photoemission data and low-energy electron diffraction measurements provide evidence that stoichiometric CrO2 is present. The consequence of this is that neither surface of CrO2 is metallic. This behaviour could result from a metal to semiconductor transition at the (110) and (100) surfaces. C1 SW Texas State Univ, Dept Phys, San Marcos, TX 78666 USA. Univ New Orleans, Dept Phys, New Orleans, LA 70148 USA. SW Texas State Univ, Inst Environm & Ind Sci, San Marcos, TX 78666 USA. Seagate Technol, Bloomington, MN 55435 USA. Louisiana State Univ, Ctr Adv Microstruct & Devices, Baton Rouge, LA 70806 USA. Tulane Univ, Dept Phys, New Orleans, LA 70118 USA. Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA. RP Ventrice, CA (reprint author), SW Texas State Univ, Dept Phys, San Marcos, TX 78666 USA. EM cventrice@txstate.edu RI Miao, Guo-Xing/A-2411-2008; Diebold, Ulrike/A-3681-2010 OI Miao, Guo-Xing/0000-0002-8735-8077; Diebold, Ulrike/0000-0003-0319-5256 NR 63 TC 13 Z9 13 U1 1 U2 22 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 8 PY 2007 VL 19 IS 31 AR 315207 DI 10.1088/0953-8984/19/31/315207 PG 18 WC Physics, Condensed Matter SC Physics GA 192FH UT WOS:000248185700008 ER PT J AU Zhang, J Ye, F Sha, H Dai, P Fernandez-Baca, JA Plummer, EW AF Zhang, Jiandi Ye, F. Sha, Hao Dai, Pengcheng Fernandez-Baca, J. A. Plummer, E. W. TI Magnons in ferromagnetic metallic manganites SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Review ID COLOSSAL-MAGNETORESISTANCE MANGANITES; SPIN EXCITATION SPECTRUM; DOUBLE-EXCHANGE SYSTEMS; TO-POLARON CROSSOVER; NEUTRON-SCATTERING; HEISENBERG-FERROMAGNET; PEROVSKITE MANGANITES; MANGANESE PEROVSKITES; PHONON INTERACTIONS; WAVE DISPERSION AB Ferromagnetic (FM) manganites, a group of likely half-metallic oxides, are of special interest not only because they are a testing ground for the classical double-exchange interaction mechanism for the 'colossal' magnetoresistance, but also because they exhibit an extraordinary arena of emergent phenomena. These emergent phenomena are related to the complexity associated with strong interplay between charge, spin, orbital, and lattice. In this review, we focus on the use of inelastic neutron scattering to study the spin dynamics, mainly the magnon excitations in this class of FM metallic materials. In particular, we discuss the unusual magnon softening and damping near the Brillouin zone boundary in relatively narrow-band compounds with strong Jahn-Teller lattice distortion and charge-orbital correlations. The anomalous behaviours of magnons in these compounds indicate the likelihood of cooperative excitations involving spin and lattice as well as orbital degrees of freedom. C1 Florida Int Univ, Dept Phys, Miami, FL 33199 USA. Oak Ridge Natl Lab, Ctr Neutron Scattering, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA. RP Zhang, J (reprint author), Florida Int Univ, Dept Phys, Miami, FL 33199 USA. EM zhangj@fiu.edu RI Sha, Hao/D-8107-2011; Dai, Pengcheng /C-9171-2012; Ye, Feng/B-3210-2010; Fernandez-Baca, Jaime/C-3984-2014 OI Dai, Pengcheng /0000-0002-6088-3170; Ye, Feng/0000-0001-7477-4648; Fernandez-Baca, Jaime/0000-0001-9080-5096 NR 113 TC 30 Z9 30 U1 3 U2 18 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 EI 1361-648X J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 8 PY 2007 VL 19 IS 31 AR 315204 DI 10.1088/0953-8984/19/31/315204 PG 28 WC Physics, Condensed Matter SC Physics GA 192FH UT WOS:000248185700005 PM 21694105 ER PT J AU Sun, ZM Xiao, H Li, J Wang, LS AF Sun, Zhong-Ming Xiao, Hai Li, Jun Wang, Lai-Sheng TI Pd-2@Sn-18(4-): Fusion of two endohedral stannaspherenes SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID GERMANIUM CLUSTERS; ZINTL IONS; DIMER; PB-12(2-); ELEMENTS; EXAMPLE; CARBON; C-60; SI AB Stannaspherene refers to an icosahedral 12-atom Sn cage cluster (Sn-12(2-)) and has also been found to be able to trap all transition metals to form gaseous endohedral clusters (M@Sn-12(-)). During exploratory solution syntheses of endohedral stannaspherenes, a new closo-deltahedral cluster, Pd-2@Sn-18(4-), has been isolated as a (2,2,2-crypt)K+ salt through the reaction of K4Sn9 and Pd[P(C6H5)(3)](4) in ethylenediamine solutions and characterized via X-ray crystallography. The new Pd-2@Sn-18(4-) cluster has pseudo-D-3d symmetry and is composed of 18 Sn atoms encapsulating two Pd atoms. It can be viewed as the fusion of two endohedral stannaspherenes (Pd@Sn-12(2-)) along their C-3 axis by removing a Sn-3 triangle on each Sn-12 unit at the cluster-cluster interface. Electronic structure calculations show that Pd-2@Sn-18(4-) consists of a Sn-18(4-) cage with two zero-valent Pd atoms and possesses a highly stable electronic configuration. C1 Washington State Univ, Dept Phys, Richland, WA 99354 USA. Pacific NW Natl Lab, Div Chem & Mat Sci, Richland, WA 99352 USA. Tsing Hua Univ, Dept Chem, Beijing 100084, Peoples R China. Tsing Hua Univ, Key Lab Organ Optoelect & Mol Engn, Minist Educ, Beijing 100084, Peoples R China. RP Wang, LS (reprint author), Washington State Univ, Dept Phys, 2710 Univ Dr, Richland, WA 99354 USA. EM ls.wang@pnl.gov RI Li, Jun/E-5334-2011; Xiao, Hai/G-7375-2011 OI Li, Jun/0000-0002-8456-3980; Xiao, Hai/0000-0001-9399-1584 NR 21 TC 53 Z9 54 U1 2 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 8 PY 2007 VL 129 IS 31 BP 9560 EP + DI 10.1021/ja0728674 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA 196LW UT WOS:000248484400014 PM 17630742 ER PT J AU Laskin, J Futrell, JH Chu, IK AF Laskin, Julia Futrell, Jean H. Chu, Ivan K. TI Is dissociation of peptide radical cations an ergodic process? SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID SURFACE-INDUCED DISSOCIATION; ELECTRON-CAPTURE DISSOCIATION; GAS-PHASE; UNIMOLECULAR DISSOCIATION; NONERGODIC PROCESS; PROTEIN CATIONS; FRAGMENTATION; ENERGETICS; COMPLEXES; MOLECULES AB This study presents a first detailed investigation of the energetics and dynamics of dissociation of peptide radical cations using a model system, in which the initial position of the radical site is well-defined. We demonstrate that fragmentation is dominated by bond cleavages that are remote from the initial position of the radical site and that all the dissociation channels are adequately described by the RRKM theory. Our findings suggest that fragmentation of peptide radical cations does not circumvent the ergodic assumption. C1 Pacific NW Natl Lab, Fundamental Sci Div, Richland, WA 99352 USA. Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China. RP Laskin, J (reprint author), Pacific NW Natl Lab, Fundamental Sci Div, POB 999 K8-88, Richland, WA 99352 USA. EM julia.laskin@pnl.gov; ivankchu@hku.hk RI Laskin, Julia/H-9974-2012 OI Laskin, Julia/0000-0002-4533-9644 NR 26 TC 35 Z9 35 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 8 PY 2007 VL 129 IS 31 BP 9598 EP + DI 10.1021/ja073748r PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA 196LW UT WOS:000248484400033 PM 17636926 ER PT J AU Mulfort, KL Hupp, JT AF Mulfort, Karen L. Hupp, Joseph T. TI Chemical reduction of metal-organic framework materials as a method to enhance gas uptake and binding SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID HYDROGEN-STORAGE; COORDINATION POLYMERS; ADSORPTION; CHANNELS; SORPTION; SITES AB A mixed-ligand metal-organic framework (MOF) of the formula Zn-2(NDC)(2)(diPyNI) (NDC = 2,6-dicarboxylate, diPyNI = N,N'-di-(4-pyridyl)-1,4,5,8-naphthalenetetracarboxydiimide) has been chemically reduced in the solid state by lithium metal in dimethylformamide (DMF). Striking hysteresis in the N-2 adsorption isotherm suggests dynamic framework behavior of the reduced material that is not observed in the neutral MOF. The reduced framework also exhibits significantly enhanced H-2 uptake and isosteric heat of adsorption over the entire loading range. Notably, the striking increase in H-2 uptake cannot be solely attributed to H-2-Li+ interactions and is most likely augmented by increased ligand polarizability and framework displacement effects. C1 Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Hupp, JT (reprint author), Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. EM j-hupp@northwestern.edu RI Hupp, Joseph/K-8844-2012 OI Hupp, Joseph/0000-0003-3982-9812 NR 20 TC 426 Z9 430 U1 12 U2 143 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 8 PY 2007 VL 129 IS 31 BP 9604 EP + DI 10.1021/ja0740364 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA 196LW UT WOS:000248484400036 PM 17636927 ER PT J AU Chen, LX Zhang, XY Wasinger, EC Attenkofer, K Jennings, G Muresan, AZ Lindsey, JS AF Chen, Lin X. Zhang, Xiaoyi Wasinger, Erik C. Attenkofer, Klaus Jennings, Guy Muresan, Ana Z. Lindsey, Jonathan S. TI Tracking electrons and atoms in a photoexcited metalloporphyrin by X-ray transient absorption spectroscopy SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID EXCITED-STATE; FINE-STRUCTURE; TEMPERATURE-DEPENDENCE; ULTRAFAST DYNAMICS; NICKEL PORPHYRINS; CONDENSED-PHASE; ZINC; RELAXATION; EXCITATION; COMPLEXES AB Simultaneously tracking electronic and molecular structures of a photoexcited metalloporphyrin, present for only 200 ps in a dilute solution, has been realized using X-ray transient absorption spectroscopy (XTA). Using laser pulses as excitation sources and delayed X-ray pulses as probes, we were able to identify the excited state electronic configuration of a nickel porphyrin as singly occupied 3d(x)2(-y)2 and 3d(z)2 molecular orbitals (MOs) with an energy gap of similar to 2.2 eV, and energy shifts 4p(z) MOs to 1.5 eV higher relative to that of the ground state, and an expanded porphyrin ring characterized by lengthening of Ni-N and Ni-C bonds. Moreover, kinetic XTA signals at different X-ray photon energies demonstrate the capability for acquiring the correlation and coherence between different optically excited states with the same technique. These results provide guidance for theoretical calculations as well as insightful understanding of optically excited states that play important roles in photochemical processes. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Argonne Natl Lab, Xray Sci Div, Argonne, IL 60439 USA. N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA. RP Chen, LX (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. EM lchen@anl.gov RI Lindsey, Jonathan/J-7761-2012 NR 30 TC 53 Z9 57 U1 1 U2 24 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 8 PY 2007 VL 129 IS 31 BP 9616 EP + DI 10.1021/ja072979v PG 4 WC Chemistry, Multidisciplinary SC Chemistry GA 196LW UT WOS:000248484400041 PM 17636917 ER PT J AU Rajaram, S Choi, TL Rolandi, M Frechet, JMJ AF Rajaram, Sridhar Choi, Tae-Lim Rolandi, Marco Frechet, Jean M. J. TI Synthesis of dendronized diblock copolymers via ring-opening metathesis polymerization and their visualization using atomic force microscopy SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID HIGH-MOLAR-MASS; DIVERGENT SYNTHESIS; CYLINDRICAL SHAPE; LINEAR-POLYMERS; MACROMONOMER; BULK; MACROMOLECULES; MANIPULATION; CHEMISTRY; CATALYST AB Dendronized diblock copolymers are prepared via ring opening metathesis polymerization. Atomic force microscopy imaging of individual molecules clearly establishes the presence of structurally distinct blocks. C1 Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Frechet, JMJ (reprint author), Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA. EM frechet@berkeley.edu OI Frechet, Jean /0000-0001-6419-0163 NR 32 TC 56 Z9 58 U1 5 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 8 PY 2007 VL 129 IS 31 BP 9619 EP + DI 10.1021/ja0741980 PG 4 WC Chemistry, Multidisciplinary SC Chemistry GA 196LW UT WOS:000248484400042 PM 17636929 ER PT J AU Fleming, CN Dattelbaum, DM Thompson, DW Ershov, AY Meyer, TJ AF Fleming, Cavan N. Dattelbaum, Dana M. Thompson, David W. Ershov, Aleksei Yu. Meyer, Thomas J. TI Excited state intervalence transfer in a rigid polymeric film SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ELECTRON-TRANSFER REACTIONS; NONEQUILIBRIUM SOLVATION ENERGIES; DONOR-ACCEPTOR INTERACTIONS; TRANSITION-METAL-COMPLEXES; NEAR-INFRARED SPECTROSCOPY; MIXED-VALENCE DIMERS; CAVITY MODEL FRCM; CHARGE-TRANSFER; RUTHENIUM(II) COMPLEXES; PHOTOPHYSICAL PROPERTIES AB The ligand-bridged complex cis,cis-[(bpy)(2)ClRu(pz)RuCl(bpy)(2)](2+) as the PF6- salt, (1)(PF6)(2), is stabilized toward photochemical ligand loss in poly(methyl methacrylate) (PMMA). Stabilization allows measurement of metal-to-ligand charge transfer (MLCT) photophysical propertiesemission and transient absorption. This includes appearance of an intervalence transfer absorption band in the near IR spectrum of the photochemically prepared, mixed valence form, [(bpy)(2)ClRuIII(pz(-circle) )(RuCl)-Cl-II(bpy)(2)](PF6)(2)* (1*(PF6)(2)). Comparison of its IT band properties with those of ground state cis,cis-(bpy)(2)ClRuIII(pz)(RuCl)-Cl-II(bpy)(2)](3+) in CD3CN allows a comparison to be made between pz and pz(-center dot) as bridging ligands. A model based on differences between rigid and fluid media provides an explanation for decreased IT band energies and widths in PMMA and provides important insight into electron transfer in rigid media. C1 Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. St Petersburg State Univ, Inst Chem, St Petersburg 198904, Russia. RP Dattelbaum, DM (reprint author), Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA. EM danadat@lanl.gov; tjmeyer@unc.edu NR 93 TC 12 Z9 12 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 8 PY 2007 VL 129 IS 31 BP 9622 EP 9630 DI 10.1021/ja068074j PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA 196LW UT WOS:000248484400043 PM 17630735 ER PT J AU Androulakis, J Lin, CH Kong, HJ Uher, C Wu, CI Hogan, T Cook, BA Caillat, T Paraskevopoulos, KM Kanatzidis, MG AF Androulakis, John Lin, Chia-Her Kong, Hun-Jin Uher, Ctirad Wu, Chun-I Hogan, Timothy Cook, Bruce A. Caillat, Thierry Paraskevopoulos, Konstantinos M. Kanatzidis, Mercouri G. TI Spinodal decomposition and nucleation and growth as a means to bulk nanostructured thermoelectrics: Enhanced performance in Pb1-xSnxTe-PbS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID QUANTUM-DOT SUPERLATTICE; OFF-CENTER IMPURITIES; SYSTEM PBS-PBTE; THERMAL-CONDUCTIVITY; SOLID-SOLUTIONS; MERIT ENHANCEMENT; ROOM-TEMPERATURE; POLYMER BLENDS; FIGURE; ALLOYS AB The solid-state transformation phenomena of spinodal decomposition and nucleation and growth are presented as tools to create nanostructured thermoelectric materials with very low thermal conductivity and greatly enhanced figure of merit. The systems (PbTe)(1-x)(PbS)(x) and (Pb0.95Sn0.05Te)(1-x)(PbS)(x) are not solid solutions but phase separate into PbTe-rich and PbS-rich regions to produce coherent nanoscale heterogeneities that severely depress the lattice thermal conductivity. For x > similar to 0.03 the materials are ordered on three submicrometer length scales. Transmission electron microscopy reveals both spinodal decomposition and nucleation and growth phenomena the relative magnitude of which varies with x. We show that the (Pb0.95Sn0.05Te)(1-x)(PbS)(x) system, despite its nanostructured nature, maintains a high electron mobility (> 100 cm(2)/V center dot s at 700 K). At x similar to 0.08 the material achieves a very low room-temperature lattice thermal conductivity of similar to 0.4 W/m center dot K. This value is only 28% of the PbTe lattice thermal conductivity at room temperature. The inhibition of heat flow in this system is caused by nanostructure-induced acoustic impedance mismatch between the PbTe-rich and PbS-rich regions. As a result the thermoelectric properties of (Pb0.95Sn0.05Te)(1-x)(PbS)(x) at x = 0.04, 0.08, and 0.16 were found to be superior to those of PbTe by almost a factor of 2. The relative importance of the two observed modes of nanostructuring, spinodal decomposition and nucleation and growth, in suppressing the thermal conductivity was assessed in this work, and we can conclude that the latter mode seems more effective in doing so. The promise of such a system for high efficiency is highlighted by a ZT similar to 1.50 at 642 K for x similar to 0.08. C1 Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA. Iowa State Univ, Ames Lab, Mat & Engn Phys Program, Ames, IA 50011 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA. Aristotle Univ Thessaloniki, Dept Phys, Thessaloniki 54124, Greece. Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. RP Kanatzidis, MG (reprint author), Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. EM m-kanatzidis@northwestern.edu RI Paraskeuopoulos, Konstantinos/F-9926-2011; Lin, Chia-Her/L-7009-2014 OI Lin, Chia-Her/0000-0002-1360-0828 NR 57 TC 270 Z9 272 U1 25 U2 165 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 8 PY 2007 VL 129 IS 31 BP 9780 EP 9788 DI 10.1021/ja071875h PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA 196LW UT WOS:000248484400060 PM 17629270 ER PT J AU Bertino, MF Gadipalli, RR Martin, LA Rich, LE Yamilov, A Heckman, BR Leventis, N Guha, S Katsoudas, J Divan, R Mancini, DC AF Bertino, Massimo F. Gadipalli, Raghuveer R. Martin, Lane A. Rich, Lauren E. Yamilov, Alexey Heckman, Brian R. Leventis, Nicholas Guha, Suchi Katsoudas, John Divan, Ralu Mancini, Derrick C. TI Quantum dots by ultraviolet and x-ray lithography SO NANOTECHNOLOGY LA English DT Article ID AMPLIFIED SPONTANEOUS EMISSION; CADMIUM-SULFIDE; ROOM-TEMPERATURE; CDS NANOCRYSTALS; OPTICAL-GAIN; RAMAN-SCATTERING; NANOPARTICLES; SIZE; LUMINESCENCE; IRRADIATION AB Highly luminescent semiconductor quantum dots have been synthesized in porous materials with ultraviolet and x-ray lithography. For this, the pore-filling solvent of silica hydrogels is exchanged with an aqueous solution of a group II metal ion together with a chalcogenide precursor such as 2-mercaptoethanol, thioacetamide or selenourea. The chalcogenide precursor is photodissociated in the exposed regions, yielding metal chalcogenide nanoparticles. Patterns are obtained by using masks appropriate to the type of radiation employed. The mean size of the quantum dots is controlled by adding capping agents such as citrate or thioglycerol to the precursor solution, and the quantum yield of the composites can be increased to up to about 30% by photoactivation. Our technique is water-based, uses readily available reagents, and highly luminescent patterned composites are obtained in a few simple processing steps. Polydispersity, however, is high (around 50%), preventing large-scale usage of the technique for the time being. Future developments that aim at a reduction of the polydispersity are presented. C1 Univ Missouri, Dept Phys, Rolla, MO 65409 USA. Midwest Res Inst, Kansas City, MO 64110 USA. Univ Missouri, Dept Chem, Rolla, MO 65409 USA. Univ Missouri, Dept Phys, Columbia, MO 65211 USA. IIT, Ctr Synchroton Radiat Res & Instrumentat, Chicago, IL 60616 USA. Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. RP Bertino, MF (reprint author), Univ Missouri, Dept Phys, Rolla, MO 65409 USA. EM Massimo@umr.edu; leventis@umr.edu RI BM, MRCAT/G-7576-2011; Guha, Suchi/B-6477-2013 OI Guha, Suchi/0000-0002-6269-2298 NR 53 TC 17 Z9 17 U1 0 U2 13 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0957-4484 J9 NANOTECHNOLOGY JI Nanotechnology PD AUG 8 PY 2007 VL 18 IS 31 AR 315603 DI 10.1088/0957-4484/18/31/315603 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Science & Technology - Other Topics; Materials Science; Physics GA 192VI UT WOS:000248231100014 ER PT J AU Carroll, MS Brewer, L Verley, JC Banks, J Sheng, JJ Pan, W Dunn, R AF Carroll, M. S. Brewer, L. Verley, J. C. Banks, J. Sheng, J. J. Pan, W. Dunn, R. TI Silicon nanocrystal growth in the long diffusion length regime using high density plasma chemical vapour deposited silicon rich oxides SO NANOTECHNOLOGY LA English DT Article ID ION-IMPLANTATION; SI NANOCRYSTALS; FILMS AB In this study, silicon nanocrystal (Si-nc) growth is studied in a relatively long thermal budget regime, 3 h at 1100-1200 degrees C, to examine large diameter nanocrystals (i.e. average diameters greater than 5 nm). Morphology, defects within the nanocrystals and size dependence as a function of thickness in the oxide are exaggerated in this regime and are more readily characterized in the longer diffusion length regime. In particular, nearby surfaces, the silicon substrate and oxide surface, appear to deplete the excess silicon in the oxide, leading to a strong nanocrystal size dependence with position in the oxide. To pursue this work, silicon naocrystals were formed through a combination of high density plasma enhanced chemical vapour deposition (HDP-CVD) of silicon rich oxides (SRO) followed by phase separation of the SRO into Si-ncs and stoichiometric oxide (SiO2). Details of the characterization of the as-grown HDP-CVD SROs are included, and differences in the Si-O-Si stretch mode peak position dependence on [O] between HDP-CVD and previously reported plasma enhanced CVD are discussed. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Carroll, MS (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM mscarro@sandia.gov RI Verley, Jason/C-2026-2008 OI Verley, Jason/0000-0003-2184-677X NR 15 TC 7 Z9 7 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0957-4484 J9 NANOTECHNOLOGY JI Nanotechnology PD AUG 8 PY 2007 VL 18 IS 31 AR 315707 DI 10.1088/0957-4484/18/31/315707 PG 7 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Science & Technology - Other Topics; Materials Science; Physics GA 192VI UT WOS:000248231100024 ER PT J AU Lei, H Pitt, WG McGrath, LK Ho, CK AF Lei, Hua Pitt, William G. McGrath, Lucas K. Ho, Clifford K. TI Modeling carbon black/polymer composite sensors SO SENSORS AND ACTUATORS B-CHEMICAL LA English DT Article DE chemiresistor; sensor array; carbon black-polymer composite; model; general effective media equation ID VOLATILE ORGANIC-COMPOUNDS; CONDUCTING POLYMER; CHEMICAL SENSORS; PHASE-DIAGRAMS; SOLVENT; RESISTIVITY; ARRAYS; TEMPERATURE; SOLUBILITY; NONSOLVENT AB Conductive polymer composite sensors have shown great potential in identifying gaseous analytes. To more thoroughly understand the physical and chemical mechanisms of this type of sensor, a mathematical model was developed by combining two sub-models: a conductivity model and a thermodynamic model, which gives a relationship between the vapor concentration of analyte(s) and the change of the sensor signals. In this work, 64 chemiresistors representing eight different carbon concentrations (8-60 vol% carbon) were constructed by depositing thin films of a carbon black/polyisobutylene composite onto concentric spiral platinum electrodes on a silicon chip. The responses of the sensors were measured in dry air and at various vapor pressures of toluene and trichloroethylene. Three parameters in the conductivity model were determined by fitting the experimental data. It was shown that by applying this model, the sensor responses can be adequately predicted for given vapor pressures; furthermore, the analyte vapor concentrations can be estimated based on the sensor responses. This model will guide the improvement of the design and fabrication of conductive polymer composite sensors for detecting and identifying mixtures of organic vapors. (C) 2007 Elsevier B.V. All rights reserved. C1 Brigham Young Univ, Dept Chem Engn, Provo, UT 84602 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Pitt, WG (reprint author), Brigham Young Univ, Dept Chem Engn, 350 Clyde Bldg, Provo, UT 84602 USA. EM pitt@byu.edu RI Pitt, William/M-6647-2014 FU NCI NIH HHS [R01 CA098138-02, R01 CA098138] NR 29 TC 29 Z9 29 U1 4 U2 11 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-4005 J9 SENSOR ACTUAT B-CHEM JI Sens. Actuator B-Chem. PD AUG 8 PY 2007 VL 125 IS 2 BP 396 EP 407 DI 10.1016/j.snb.2007.02.041 PG 12 WC Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation SC Chemistry; Electrochemistry; Instruments & Instrumentation GA 203EC UT WOS:000248956900007 PM 22518071 ER PT J AU Page, K Stoltzfus, MW Kim, YI Proffen, T Woodward, PM Cheetham, AK Seshadri, R AF Page, Katharine Stoltzfus, Matthew W. Kim, Young-Il Proffen, Thomas Woodward, Patrick M. Cheetham, Anthony K. Seshadri, Ram TI Local atomic ordering in BaTaO2N studied by neutron pair distribution function analysis and density functional theory SO CHEMISTRY OF MATERIALS LA English DT Article ID OXYNITRIDE PEROVSKITES; DIELECTRIC-PROPERTIES; DIFFRACTION; LATIO2N; SOLIDS AB The local structure and oxygen/nitrogen ordering of the high permittivity perovskite BaTaO2N has been studied using a combination of neutron total scattering and density functional electronic structure calculations. Although the average structure as revealed by neutron diffraction Rietveld analysis is cubic Pm $$($) over barm with no evidence of O/N ordering, the local structure as revealed by pair distribution function analysis of the total neutron scattering appears to favor a cis configuration of the TaO4N2 polyhedra with small Ta displacements toward the N atoms. Density functional calculations similarly suggest that the cis TaO4N2 polyhedron is more stable than the corresponding trans variant. C1 Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA. Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA. Ohio State Univ, Dept Chem, Columbus, OH 43210 USA. Los Alamos Natl Lab, Manuel Lujan Jr Neutron Scattering Ctr, Los Alamos, NM 87545 USA. RP Seshadri, R (reprint author), Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA. EM seshadri@mrl.ucsb.edu RI Page, Katharine/C-9726-2009; Lujan Center, LANL/G-4896-2012; Seshadri, Ram/C-4205-2013; Kim, Young-il/I-9322-2014; Proffen, Thomas/B-3585-2009 OI Page, Katharine/0000-0002-9071-3383; Seshadri, Ram/0000-0001-5858-4027; Kim, Young-il/0000-0003-2755-9587; Proffen, Thomas/0000-0002-1408-6031 NR 30 TC 35 Z9 37 U1 1 U2 29 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD AUG 7 PY 2007 VL 19 IS 16 BP 4037 EP 4042 DI 10.1021/cm0709673 PG 6 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA 195VE UT WOS:000248439400026 ER PT J AU Ciccioli, A Gigli, G Meloni, G Testani, E AF Ciccioli, A. Gigli, G. Meloni, Giovanni Testani, E. TI The dissociation energy of the new diatomic molecules SiPb and GePb SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LYING ELECTRONIC STATES; GAUSSIAN-BASIS SETS; CONFIGURATION-INTERACTION CALCULATIONS; LASER VAPORIZATION; MASS-SPECTROMETRY; PHOTOELECTRON-SPECTROSCOPY; GERMANIUM CLUSTERS; IONIZATION-POTENTIALS; INFRARED-SPECTRA; HIGH-TEMPERATURE AB The diatomic molecules SiPb and GePb were for the first time identified by producing high temperature vapors of the constituent pure elements in a "double-oven-like" molecular-effusion assembly. The partial pressures of the atomic, heteronuclear, and homonuclear gaseous species observed in the vapor, namely, Si, Ge, Pb, SiPb, GePb, Pb-2, Ge-n, and Si-n (n=2-3), were mass-spectrometrically measured in the overall temperature ranges 1753-1961 K (Ge-Pb) and 1992-2314 K (Si-Pb). The dissociation energies of the new species were determined by second- and third-law analyses of both the direct dissociation reactions and isomolecular exchange reactions involving homonuclear molecules. The selected values of the dissociation energies at 0 K (D-0(degrees)) are 165.1 +/- 7.3 and 141.6 +/- 6.9 kJ/mol, respectively, for SiPb and GePb, and the corresponding enthalpies of formation (Delta H-f(0)degrees) are 476.4 +/- 7.3 and 419.3 +/- 6.9 kJ/mol. The ionization efficiency curves of the two species were measured, giving the following values for the first ionization energies: 7.0 +/- 0.2 eV (SiPb) and 7.1 +/- 0.2 eV (GePb). A computational study of the species SiPb and GePb was also carried out at the CCSD(T) level of theory using the relativistic electron core potential approach. Molecular parameters, adiabatic ionization energies, adiabatic electron affinities, and dissociation energies of the title species were calculated, as well as the enthalpy changes of the exchange reactions involving the other Pb-containing diatomics of group 14. Finally, a comparison between the experimental and theoretical results is presented, and from a semiempirical correlation the unknown dissociation energies of the SiSn and PbC molecules are predicted as 234 +/- 7 and 185 +/- 11 kJ/mol, respectively. (c) 2007 American Institute of Physics. (c) 2007 American Institute of Physics. C1 Univ Roma La Sapienza, Dipartimento Chim, I-00185 Rome, Italy. Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Ciccioli, A (reprint author), Univ Roma La Sapienza, Dipartimento Chim, Piazzale Aldo Moro 5, I-00185 Rome, Italy. EM g.gigli@caspur.it NR 91 TC 15 Z9 15 U1 0 U2 9 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 AUG 7 PY 2007 VL 127 IS 5 AR 054303 DI 10.1063/1.2752803 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 197YV UT WOS:000248594200011 PM 17688336 ER PT J AU Valiev, M Garrett, BC Tsai, MK Kowalski, K Kathmann, SM Schenter, GK Dupuis, M AF Valiev, Marat Garrett, Bruce C. Tsai, Ming-Kang Kowalski, Karol Kathmann, Shawn M. Schenter, Gregory K. Dupuis, Michel TI Hybrid approach for free energy calculations with high-level methods: Application to the S(N)2 reaction of CHCl3 and OH- in water SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIALS; SOLVATION; PATHS AB We present an approach to calculate the free energy profile along a condensed-phase reaction path based on high-level electronic structure methods for the reactive region. The bulk of statistical averaging is shifted toward less expensive descriptions by using a hierarchy of representations that includes molecular mechanics, density functional theory, and coupled cluster theories. As an application of this approach we study the reaction of CHCl3 with OH- in aqueous solution. (c) 2007 American Institute of Physics. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Mol Sci Software Grp, Richland, WA 99352 USA. Pacific NW Natl Lab, Div Mat & Chem Sci, Richland, WA 99352 USA. RP Valiev, M (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, Mol Sci Software Grp, Richland, WA 99352 USA. EM marat.valiev@pnl.gov RI Garrett, Bruce/F-8516-2011; Schenter, Gregory/I-7655-2014; OI Schenter, Gregory/0000-0001-5444-5484; Tsai, Ming-Kang/0000-0001-9189-5572 NR 19 TC 44 Z9 44 U1 0 U2 9 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 AUG 7 PY 2007 VL 127 IS 5 AR 051102 DI 10.1063/1.2768343 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 197YV UT WOS:000248594200002 PM 17688327 ER PT J AU Guo, H Penner, JE Herzog, M Xie, SC AF Guo, Huan Penner, Joyce E. Herzog, Michael Xie, Shaocheng TI Investigation of the first and second aerosol indirect effects using data from the May 2003 Intensive Operational Period at the Southern Great Plains SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES LA English DT Article ID BOUNDARY-LAYER CLOUDS; LARGE-EDDY SIMULATION; RADIATIVE PROPERTIES; OPTICAL-PROPERTIES; EFFECTIVE RADIUS; WATER CLOUDS; PHASE-III; PARAMETERIZATION; STRATOCUMULUS; SURFACE AB The Active Tracer High-Resolution Atmospheric Model is used to examine the aerosol indirect effect (AIE) for a spring continental stratus cloud on the basis of data collected during the 17 May 2003 Aerosol Intensive Operation Period (AIOP) at the Atmospheric Radiation Measurement ( ARM) Program Southern Great Plains site. Model results for our base case, which uses observed aerosol concentrations, agree reasonably well with the available observations, giving confidence that the basic model is reasonable. Sensitivity tests are performed to explore the response of the clouds to changes in the aerosol number concentration and surface fluxes. During the major part of the simulation, from 0630 through 1400 local standard time ( LST), an increase in the aerosol number concentration ( Na) results in a decrease of the mean cloud droplet size and an increase of the cloud liquid water path ( LWP) until aerosol number concentration levels reach 1200 cm(-3). Further increases in aerosol concentration do not increase the liquid water path because the depletion of cloud water by precipitation is negligible above this number concentration. After 1400 LST, the liquid water path decreases when aerosols increase as long as N(a) < 600 cm(-3) and remains unchanged for higher aerosol concentrations. The decrease of LWP is associated with the evaporative cooling below cloud base which leads to more condensation of water vapor, a result that is consistent with afternoon satellite observations of the response of continental clouds to increases in droplet concentrations. A sensitivity test with a stronger surface latent flux increases both the cloud geometrical thickness and cloud water content. On the other hand, a sensitivity test with a stronger surface sensible heat flux leads to a higher cloud base and a shallower and drier cloud. The response of the cloud geometrical thickness to changes in surface sensible heat flux dominates that of the cloud water content. The cloud fraction is also reduced at the end of the simulation time period. Because the surface heat fluxes will likely change when aerosol and droplet number concentrations change, these sensitivity tests show that a fully coupled simulation with a land surface model will be needed to fully assess the response of the cloud to changing aerosol concentrations. Nevertheless, since the thermodynamic boundary layer profiles do not change significantly when aerosol concentrations are changed, our results for changing aerosol concentrations are qualitatively correct. C1 Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA. Natl Ocean & Atmospher Adm, Geophys Fluid Dynam Lab, Princeton, NJ 08452 USA. Lawrence Livermore Natl Lab, Div Atmospher Sci, Livermore, CA 94550 USA. RP Guo, H (reprint author), Univ Michigan, Dept Atmospher Ocean & Space Sci, 1546 Space Res Bldg,2455 Hayward St, Ann Arbor, MI 48109 USA. RI Herzog, Michael/B-4722-2010; Penner, Joyce/J-1719-2012; Xie, Shaocheng/D-2207-2013; Guo, Huan/D-8282-2014 OI Xie, Shaocheng/0000-0001-8931-5145; NR 50 TC 8 Z9 8 U1 0 U2 2 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-ATMOS JI J. Geophys. Res.-Atmos. PD AUG 7 PY 2007 VL 112 IS D15 AR D15206 DI 10.1029/2006JD007173 PG 18 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 202AA UT WOS:000248872600001 ER PT J AU Stein, GE Lee, WB Fredrickson, GH Kramer, EJ Li, X Wang, J AF Stein, Gila E. Lee, Won Bo Fredrickson, Glenn H. Kramer, Edward J. Li, Xuefa Wang, Jin TI Thickness dependent ordering in laterally confined monolayers of spherical-domain block copolymers SO MACROMOLECULES LA English DT Article ID THIN-FILMS; LIQUID-CRYSTALS; 2 DIMENSIONS; DIBLOCK COPOLYMERS; ORIENTATION; NANOSTRUCTURES; TRANSITIONS; MICROSCOPY; CYLINDERS; COHERENCE AB Monolayers of spherical-domain block copolymer, exhibiting hexagonal symmetry with a (10) periodicity of 25 nm, are laterally confined in hexagonal wells 12 mu m wide and 26 nm deep that span the entire area of a two-inch diameter silicon wafer. The structure is characterized with grazing-incidence small-angle X-ray diffraction, which provides a quantitative measure of the positional and orientational order over macroscopic areas. Results are interpreted within the KTNHY framework for 2D phase behavior. At T = 210 degrees C, films that are 41 nm thick (monolayer plus brush) form oriented single crystals where the close-packed rows of the lattice are aligned with the edges of the wells. Translational order is determined to decay algebraically with a correlation function of the form g(T)(r) similar to r(-0.25), consistent with a KTNHY 2D crystal having a shear modulus mu = 1.7 x 10(-4) N/m. Orientational order is long-range, with a full width at half-maximum of 1.1 degrees. Decreasing the film thickness by 1 nm results in hexatic ordering with a translational correlation length on the order of 0.5 mu m, and diminished orientational order with a full width at half-maximum of 2.4 degrees. Scanning force microscopy measurements of the thickness-dependent defect structure are consistent with the crystalline and hexatic phase behavior measured by diffraction. C1 Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA. Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Kramer, EJ (reprint author), Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA. EM edkramer@mrl.ucsb.edu RI Stein, Gila/P-1927-2016; OI Stein, Gila/0000-0002-3973-4496; Lee, Won Bo/0000-0001-7801-083X NR 55 TC 28 Z9 28 U1 0 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 EI 1520-5835 J9 MACROMOLECULES JI Macromolecules PD AUG 7 PY 2007 VL 40 IS 16 BP 5791 EP 5800 DI 10.1021/ma062559a PG 10 WC Polymer Science SC Polymer Science GA 195VG UT WOS:000248439700024 ER PT J AU Chen, WR Porcar, L Liu, Y Butler, PD Magid, LJ AF Chen, Wei-Ren Porcar, Lionel Liu, Yun Butler, Paul D. Magid, Linda J. TI Small angle neutron scattering studies of the counterion effects on the molecular conformation and structure of charged g4 PAMAM dendrimers in aqueous solutions SO MACROMOLECULES LA English DT Article ID POLY(PROPYLENE IMINE) DENDRIMERS; DIFFUSE INTERFACES; DYNAMICS; POLYMERS; PH; SIMULATION; GENERATION; PROTEINS; MICELLAR; SOLVENT AB The structural properties of generation 4 (G4) poly(amidoamine) starburst dendrimers (PAMAM) with an ethylenediamine (EDA) central core in D2O solutions have been studied by small-angle neutron scattering (SANS). Upon the addition of DCl, SANS patterns show pronounced inter-particle correlation peaks due to the strong repulsion introduced by the protonation of the amino groups of the dendrimers. By solving the Ornstein-Zernike integral equation (OZ) with hypernetted chain closure (HNC), the dendrimer-dendrimer structure factor S(Q) is determined and used to fit the experimental data, where Q is the magnitude of the scattering wave vector. Quantitative information such as the effective charge per dendrimer and the radius of gyration, R-G, at different pD values is obtained. The results show that R-G only changes by about 4% when the pD value varies from 10.25 to 4.97, and significant counterion association/condensation occurs, strongly mediating the inter-dendrimer interaction. The influence of interplay between counterions and molecular protonation of dendrimers imposes a strong effect on the dendrimer conformation and effective interaction. Although the change of R-G is very small, careful analyses of the high Q data and fitting parameters indicate a possible internal structure change of a dendrimer when the amino groups are progressively charged. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA. RP Magid, LJ (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. EM lmagid@utk.edu RI Liu, Yun/A-2478-2010; Butler, Paul/D-7368-2011; Liu, Yun/F-6516-2012 OI Liu, Yun/0000-0002-0944-3153; Liu, Yun/0000-0002-0944-3153 NR 57 TC 79 Z9 80 U1 6 U2 50 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD AUG 7 PY 2007 VL 40 IS 16 BP 5887 EP 5898 DI 10.1021/ma0626564 PG 12 WC Polymer Science SC Polymer Science GA 195VG UT WOS:000248439700034 ER PT J AU Kaiser, A Klok, CJ Socha, JJ Lee, WK Quinlan, MC Harrison, JF AF Kaiser, Alexander Klok, C. Jaco Socha, John J. Lee, Wah-Keat Quinlan, Michael C. Harrison, Jon F. TI Increase in tracheal investment with beetle size supports hypothesis of oxygen limitation on insect gigantism SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA LA English DT Article DE allometric scaling; hyperoxia; Tenebrionidae; tracheal system ID SCHISTOCERCA-AMERICANA; GAS-EXCHANGE; ATMOSPHERIC OXYGEN; DIFFUSING-CAPACITY; METABOLIC-RATE; BODY SIZE; ONTOGENY; LOCUST; SYMMORPHOSIS; GRASSHOPPER AB Recent studies have suggested that Paleozoic hyperoxia enabled animal gigantism, and the subsequent hypoxia drove a reduction in animal size. This evolutionary hypothesis depends on the argument that gas exchange in many invertebrates and skin-breathing vertebrates becomes compromised at large sizes because of distance effects on diffusion. In contrast to vertebrates, which use respiratory and circulatory systems in series, gas exchange in insects is almost exclusively determined by the tracheal system, providing a particularly suitable model to investigate possible limitations of oxygen delivery on size. in this study, we used synchrotron x-ray phase-contrast imaging to visualize the tracheal system and quantify its dimensions in four species of darkling beetles varying in mass by 3 orders of magnitude. We document that, in striking contrast to the pattern observed in vertebrates larger insects devote a greater fraction of their body to the respiratory system, as tracheal volume scaled with mass(1.29). The trend is greatest in the legs; the cross-sectional area of the trachea penetrating the leg orifice scaled with mass(1.02), whereas the cross-sectional area of the leg orifice scaled with mass(0.77). These trends suggest the space available for tracheae within the leg may ultimately limit the maximum size of extant beetles. Because the size of the tracheal system can be reduced when oxygen supply is increased, hyperoxia, as occurred during late Carboniferous and early Permian, may have facilitated the evolution of giant insects by allowing limbs to reach larger sizes before the tracheal system became limited by spatial constraints. C1 Midwestern Univ, Dept Basic Sci, Glendale, AZ 85308 USA. Arizona State Univ, Sch Life Sci, Sect Organismal, Tempe, AZ 85287 USA. Arizona State Univ, Sch Life Sci, Integrat & Syst Biol, Tempe, AZ 85287 USA. Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA. RP Kaiser, A (reprint author), Midwestern Univ, Dept Basic Sci, Glendale, AZ 85308 USA. EM akaise@midwestern.edu NR 40 TC 69 Z9 70 U1 5 U2 48 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0027-8424 J9 P NATL ACAD SCI USA JI Proc. Natl. Acad. Sci. U. S. A. PD AUG 7 PY 2007 VL 104 IS 32 BP 13198 EP 13203 DI 10.1073/pnas.0611544104 PG 6 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA 198TL UT WOS:000248650300044 PM 17666530 ER PT J AU Lenhart, JL Cole, PJ Unal, B Hedden, R AF Lenhart, Joseph L. Cole, Phillip J. Unal, Burcu Hedden, Ronald TI Development of nonaqueous polymer gels that exhibit broad temperature performance SO APPLIED PHYSICS LETTERS LA English DT Article ID RELEASE; FILMS; FLOW AB While significant work has focused on aqueous hydrogels for biotechnology applications, hydrogels suffer from a limited operating temperature range due to the moderate freezing point and high volatility of water. In this work, a nonaqueous, chemically cross-linked polybutadiene gel has been designed which exhibits stable properties over a temperature range of -60-70 degrees C. A combination of rheology, neutron scattering, and tack adhesion testing was utilized to characterize the gel properties. The methodology employed to design the polybutadiene gel can be generalized to a variety of gel materials and applications. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. RP Lenhart, JL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM jllenha@sandia.gov; pjcole@sandia.gov RI Hedden, Ronald/M-3909-2014 OI Hedden, Ronald/0000-0003-3571-1403 NR 16 TC 10 Z9 10 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 6 PY 2007 VL 91 IS 6 AR 061929 DI 10.1063/1.2769938 PG 3 WC Physics, Applied SC Physics GA 198XS UT WOS:000248661400056 ER PT J AU Potzger, K Zhou, SQ Reuther, H Kuepper, K Talut, G Helm, M Fassbender, J Denlinger, JD AF Potzger, K. Zhou, Shengqiang Reuther, H. Kuepper, K. Talut, G. Helm, M. Fassbender, J. Denlinger, J. D. TI Suppression of secondary phase formation in Fe implanted ZnO single crystals SO APPLIED PHYSICS LETTERS LA English DT Article ID SEMICONDUCTOR; SPINTRONICS; FILMS AB Unwanted secondary phases are one of the major problems in diluted magnetic semiconductor creation. Here, the authors show possibilities to avoid such phases in Fe implanted and postannealed ZnO(0001) single crystals. While alpha-Fe nanoparticles are formed after such doping in as-polished crystals, high temperature (1273 K) annealing in O-2 or high vacuum before implantation suppresses these phases. Thus, the residual saturation magnetization in the preannealed ZnO single crystals is about 20 times lower than for the as-polished ones and assigned to indirect coupling between isolated Fe ions rather than to clusters. C1 Forschungszentrum Rossendorf, Inst Ion Beam Phys & Mat Res, D-01314 Dresden, Germany. Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Potzger, K (reprint author), Forschungszentrum Rossendorf, Inst Ion Beam Phys & Mat Res, POB 510119, D-01314 Dresden, Germany. EM k.potzger@fzd.de RI Fassbender, Juergen/A-8664-2008; Helm, Manfred/B-2284-2009; Zhou, Shengqiang/C-1497-2009; Kupper, Karsten/G-1397-2016 OI Fassbender, Juergen/0000-0003-3893-9630; Zhou, Shengqiang/0000-0002-4885-799X; NR 18 TC 17 Z9 17 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 6 PY 2007 VL 91 IS 6 AR 062107 DI 10.1063/1.2768196 PG 3 WC Physics, Applied SC Physics GA 198XS UT WOS:000248661400064 ER PT J AU Wang, F Li, SS Xia, JB Jiang, HX Lin, JY Li, J Wei, SH AF Wang, Fei Li, Shu-Shen Xia, Jian-Bai Jiang, H. X. Lin, J. Y. Li, Jingbo Wei, Su-Huai TI Effects of the wave function localization in AlInGaN quaternary alloys SO APPLIED PHYSICS LETTERS LA English DT Article ID TOTAL-ENERGY CALCULATIONS; QUASI-RANDOM STRUCTURES; MOLECULAR-BEAM EPITAXY; II-VI; BASIS-SET; BAND-GAP; SEMICONDUCTORS; LATTICE AB Using the first-principles band-structure method and the special quasirandom structures approach, the authors have investigated the band structure of random AlxInyGa1-x-yN quaternary alloys. They show that the wave functions of the band edge states are more localized on the InN sites. Consequently, the photoluminescence transition intensity in the alloy is higher than that in GaN. The valence band maximum state of the quaternary alloy is also higher than GaN with the same band gap, indicating that the alloy can be doped more easily as p-type. (c) 2007 American Institute of Physics. C1 Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China. Kansas State Univ, Dept Phys, Manhattan, KS 66506 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Wang, F (reprint author), Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China. EM suhuai_wei@nrel.gov RI Wang, Fei/B-1538-2009; Lin, Jingyu/A-7276-2011; Jiang, Hongxing/F-3635-2011 OI Lin, Jingyu/0000-0003-1705-2635; Jiang, Hongxing/0000-0001-9892-4292 NR 22 TC 28 Z9 28 U1 3 U2 24 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 AUG 6 PY 2007 VL 91 IS 6 AR 061125 DI 10.1063/1.2769958 PG 3 WC Physics, Applied SC Physics GA 198XS UT WOS:000248661400025 ER PT J AU Wang, YM Hamza, AV Barbee, TW AF Wang, Y. M. Hamza, A. V. Barbee, T. W., Jr. TI Incipient plasticity in metallic glass modulated nanolaminates SO APPLIED PHYSICS LETTERS LA English DT Article ID STRAIN-RATE SENSITIVITY; DUCTILITY; COPPER; CU/ZR AB The plastic deformation in copper-zirconium nanocrystalline-amorphous nanolaminates is investigated by means of stress-relaxation experiments at a range of initial stress levels. Progressive multistep relaxation cycles reveal that the onset of plastic deformation occurs at a much lower stress level in nanocrystalline-amorphous nanolaminate than in crystalline-crystalline nanolaminates or other nanostructured materials. The derived activation volumes and strain rate sensitivities imply interfacial dislocation mechanisms, consistent with the observations from postmorterm transmission electron microscopy. This indicates that the crystalline-amorphous interfaces may be the preferred source for dislocation nucleation and/or emission. (c) 2007 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Nanoscale Synth & Characterizat Lab, Livermore, CA 94550 USA. RP Wang, YM (reprint author), Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Nanoscale Synth & Characterizat Lab, Livermore, CA 94550 USA. EM ymwang@llnl.gov RI Wang, Yinmin (Morris)/F-2249-2010 NR 15 TC 17 Z9 17 U1 1 U2 24 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 AUG 6 PY 2007 VL 91 IS 6 AR 061924 DI 10.1063/1.2768939 PG 3 WC Physics, Applied SC Physics GA 198XS UT WOS:000248661400051 ER PT J AU Kalyuzhnyi, YV Cummings, PT AF Kalyuzhnyi, Yu. V. Cummings, P. T. TI Phase coexistence in polydisperse mixture of hard-sphere colloidal and flexible chain particles SO CHEMICAL PHYSICS LETTERS LA English DT Article ID THERMODYNAMIC PERTURBATION-THEORY; MODEL ATHERMAL MIXTURES; SELF-EXCLUDING POLYMERS; EQUILIBRIA; SUSPENSIONS; BEHAVIOR; FLUIDS AB A theoretical scheme for the calculation of the full phase diagram (including cloud and shadow curves, binodals and distribution functions of the coexisting phases) for colloid-polymer mixtures with polymer chain length polydispersity and hard-sphere colloidal and polymeric monomer sizes polydispersity is proposed. The scheme combines the thermodynamic perturbation theory for associating fluids and the recently developed method used to determine the phase diagram of polydisperse spherical shape colloidal fluids [Bellier-Castella et al. J. Chem. Phys. 113 (2000) 8337]. By way of illustration we present and discuss the full phase diagram for the mixture with polydispersity in the size of the hard-sphere colloidal particles. (C) 2007 Elsevier B.V. All rights reserved. C1 Inst Condensed Matter Phys, UA-79011 Lvov, Ukraine. Vanderbilt Univ, Dept Chem Engn, Nashville, TN 37235 USA. Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Nanomat Theory Inst, Oak Ridge, TN 37830 USA. RP Kalyuzhnyi, YV (reprint author), Inst Condensed Matter Phys, Svientsitskoho 1, UA-79011 Lvov, Ukraine. EM yukal@icmp.lviv.ua RI Cummings, Peter/B-8762-2013 OI Cummings, Peter/0000-0002-9766-2216 NR 17 TC 5 Z9 5 U1 2 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 AUG 6 PY 2007 VL 443 IS 4-6 BP 243 EP 247 DI 10.1016/j.cplett.2007.06.052 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 202IV UT WOS:000248896100015 ER PT J AU Shkrob, IA AF Shkrob, Ilya A. TI On the nature of infrared absorbing trapped electron center in low-temperature ice-I-h SO CHEMICAL PHYSICS LETTERS LA English DT Article ID HYDRATED ELECTRON; SOLVATION DYNAMICS; EXCESS ELECTRONS; CLUSTER ANIONS; D2O ICE; WATER; LIQUID; SPECTROSCOPY; SIMULATION; TIME AB Ionization of polar liquids and glasses often yields metastable electron centers known as 'weakly bound' (wb) electrons that absorb to the red of the ground state of the solvated/trapped electron. In this Letter, we address the structure of the wb electron in low-temperature ice-I-h theoretically. The comparison with the observed properties suggests that this species is an s-like electron filling a water vacancy. (C) 2007 Published by Elsevier B.V. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Shkrob, IA (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. EM shkrob@anl.gov NR 32 TC 5 Z9 5 U1 1 U2 4 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 AUG 6 PY 2007 VL 443 IS 4-6 BP 289 EP 292 DI 10.1016/j.cplett.2007.06.111 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 202IV UT WOS:000248896100024 ER PT J AU Stebounova, LV Romanyuk, YE Dengel, RG Leone, SR AF Stebounova, Larissa V. Romanyuk, Yaroslav E. Dengel, Radu-Gabriel Leone, Stephen R. TI Size-dependent near-field coupling observed from InN nanodots grown on nitrided sapphire SO CHEMICAL PHYSICS LETTERS LA English DT Article ID OPTICAL MICROSCOPY; SCATTERING; RESOLUTION AB Optical contrast from InN nanodots grown on nitrided sapphire is investigated using apertureless near-field scanning optical microscopy at two different visible wavelengths, 633 nm and 532 nm. The dependence of the near-field signal on the size of the dots is described using a coupled dipole model expanded to four dipoles. The near-field signal from InN dots with a height of < 1 nm is detected due to dipole-dipole coupling. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Dept Chem & Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Leone, SR (reprint author), Univ Calif Berkeley, Dept Chem & Phys, Berkeley, CA 94720 USA. EM srl@berkeley.edu NR 18 TC 3 Z9 3 U1 0 U2 1 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 AUG 6 PY 2007 VL 443 IS 4-6 BP 333 EP 336 DI 10.1016/j.cplett.2007.06.093 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 202IV UT WOS:000248896100033 ER PT J AU Smit, JP Kim, HS Saratovsky, I Stark, KB Fitzgerald, G Zajac, GW Gaillard, JF Poeppelmeier, KR Stair, PC AF Smit, Jared P. Kim, Hack-Sung Saratovsky, Ian Stark, Klaus B. Fitzgerald, George Zajac, Gerry W. Gaillard, Jean-Francois Poeppelmeier, Kenneth R. Stair, Peter C. TI A spectroscopic and computational investigation of the vanadomolybdate local structure in the lyonsite phase Mg2.5VMoO8 SO INORGANIC CHEMISTRY LA English DT Article ID LASER RAMAN-SPECTROSCOPY; CRYSTAL-STRUCTURE; ALUMINUM MOLYBDATE; FERRIC MOLYBDATE; SYSTEM; VANADIUM; KAL(MOO4)(2); DIFFRACTION; AL2(MOO4)3; IFEFFIT AB The vibrational spectrum of Mg2.5VMoO8 obtained by quantum mechanical simulation is compared with the experimentally observed Raman spectrum. This simulation suggests that the observed band at 1016 cm(-1) is attributed to the MoO-Mg stretching from two-coordinate oxygen atoms that are adjacent to Mg2+ cation vacancies. Extended X-ray absorption fine structure spectroscopy supports the structural model used to simulate the vibrational modes in Mg2.5VMoO8 that match the observed Raman data. C1 Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Accelrys Inc, Houston, TX 77020 USA. Accelrys Inc, San Diego, CA 92121 USA. Ineos Technol, Naperville, IL 60563 USA. Northwestern Univ, Dept Environm Engn & Sci, Evanston, IL 60208 USA. RP Gaillard, JF (reprint author), Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA. EM jf-gaillard@northwestern.edu; krp@northwestern.edu; pstair@northwestern.edu RI Gaillard, Jean-Francois/B-6981-2009; Gaillard, Jean-Francois/E-9445-2013 OI Gaillard, Jean-Francois/0000-0002-8276-6418 NR 35 TC 1 Z9 1 U1 0 U2 13 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD AUG 6 PY 2007 VL 46 IS 16 BP 6556 EP 6564 DI 10.1021/ic7006815 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 194LF UT WOS:000248345200045 PM 17630686 ER PT J AU Salazar, MR Thompson, SL Laintz, KE Meyer, TO Pack, RT AF Salazar, Michael R. Thompson, Shelley L. Laintz, Kenneth E. Meyer, Thomas O. Pack, Russell T. TI Degradation of a poly(ester urethane) elastomer. IV. Sorption and diffusion of water in PBX 9501 and its components SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article DE degradation; diffusion; hydrolysis; polyurethanes; solubility ID HYDROLYSIS AB In preparation for studying the hydrolytic degradation of Estane (R) 5703 in the plastic-bonded explosive PBX 9501, the sorption (solubility) and diffusion of water in PBX 9501 and each of its components are studied experimentally and modeled theoretically. Experiments are reported that measure the weight gain or loss due to a change in the relative humidity (RH). For all of the components, the equilibrium amount of water sorbed per gram of sample is linear in the RH at low relative humidities but curves upwards at higher relative humidities. This behavior is modeled with a water cluster model. Diffusion coefficients are determined by modeling the time dependence of the water concentrations assuming Fickian diffusion, and that fits the data for some of the materials. However, all the samples that contain the explosive HMX show much more complicated behavior at high relative humidities, and that is presented and discussed. (c) 2007 Wiley Periodicals, Inc. C1 Los Alamos Natl Lab, Div Theoret T12,MS B268, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, DX Div DX 2,MS C920, Los Alamos, NM 87545 USA. LLC, BWXT Pantex, Amarillo, TX 79120 USA. RP Pack, RT (reprint author), Los Alamos Natl Lab, Div Theoret T12,MS B268, POB 1663, Los Alamos, NM 87545 USA. EM rtpack@lanl.gov NR 21 TC 11 Z9 11 U1 1 U2 4 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD AUG 5 PY 2007 VL 105 IS 3 BP 1063 EP 1076 DI 10.1002/app.26207 PG 14 WC Polymer Science SC Polymer Science GA 183MD UT WOS:000247576000009 ER PT J AU Khare, VP Greenberg, AR Kelley, SS Pilath, H Roh, IJ Tyber, J AF Khare, Vivek P. Greenberg, Alan R. Kelley, Stephen S. Pilath, Heidi Roh, Il Juhn Tyber, Jeff TI Synthesis and characterization of dense and porous cellulose films SO JOURNAL OF APPLIED POLYMER SCIENCE LA English DT Article DE membranes; cellulose; microfiltration; ultrafiltration; porous film characterization ID N-OXIDE SOLUTION; MEMBRANE FORMATION; GAS; SEPARATION AB Whereas cellulose-derived polymers are routinely used as membrane materials, the cellulose polymer itself is not directly used to synthesize dense/porous films for membrane applications. Recently, N-methylmorpholine N-oxide (NMMO) and din-iethylacetamide (DMAc)/Iithium chloride (LiCl) have been successfully employed for dissolving unmodified cellulose. This provides a strong rationale for reexamining the possibility of cellulose membrane fabrication using these solvents. By judiciously selecting solvents, casting conditions, and solvent exchange steps, we successfully synthesized dense/asymmetric-porous cellulose films. The pore size and porosity of the porous films decreased systematically with increasing cellulose concentration. SEM analysis of the cross sections revealed an asymmetric skinned structure with monotonically increasing pore size away from the skin. The measured pore diameters were in the range 1.8-4.8 pm. Mechanical testing indicated that the dense films possessed tensile properties comparable to those of cellulose acetate (CA) films. Though nitrogen permeability values were comparable for cellulose and CA dense films, cellulose film permeability depended upon the type of drying protocol employed. Overall, these results demonstrate that processability need not be a constraint in the use of cellulose polymer for membrane fabrication. In selected applications, cellulose membranes could become a cost-effective, environmentally friendly alternative to other more commonly employed membrane polymers. (c) 2007 Wiley Periodicals, Inc. C1 Univ Colorado, NSF Membrane Appl Sci & Technol Ctr, Dept Mech Engn, Boulder, CO 80309 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. Hydranautics Inc, Oceanside, CA 92054 USA. RP Khare, VP (reprint author), Univ Colorado, NSF Membrane Appl Sci & Technol Ctr, Dept Mech Engn, Boulder, CO 80309 USA. EM vivek.khare1@ge.com NR 19 TC 23 Z9 24 U1 2 U2 33 PU JOHN WILEY & SONS INC PI HOBOKEN PA 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0021-8995 J9 J APPL POLYM SCI JI J. Appl. Polym. Sci. PD AUG 5 PY 2007 VL 105 IS 3 BP 1228 EP 1236 DI 10.1002/app.25888 PG 9 WC Polymer Science SC Polymer Science GA 183MD UT WOS:000247576000026 ER PT J AU Yu, LD Sangyuenyongpipat, S Anuntalabhochai, S Phanchaisri, B Vilaithong, T Brown, IG AF Yu, L. D. Sangyuenyongpipat, S. Anuntalabhochai, S. Phanchaisri, B. Vilaithong, T. Brown, I. G. TI Effects of low-energy ion beam bombardment on biological cell envelopes SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 14th International Conference on Surface Modification by Ion Beams (SMMIB 05) CY SEP 04-09, 2005 CL Kusadasi, TURKEY SP TUBITAK, EGE Univ, AKZ NOBEL KEMIPOL A S, ESBAS, HIPOKRAT A S, EYUP ALTAN, MEHMET ALTAN, MUSTAFA ALTAN, Off Naval Res Global, CemeCon Scandinavia, EBSO, Ford Otosan, Turk Otomobil Fabridasi, Egen Otomotiv Sanayi ve Ticaret A S, Kale Kahp Makina ve Kalp Sanayi A S, Canakkale Seramilk Kalevodur, Kale Grp, Ege Univ Sci & Technol Ctr, Mat Res Soc DE ion beam bombardment; nanocrater; cell envelope; gene transfer ID WALL AB Low-energy ion beam biotechnology has seen rapid development worldwide in recent years. This is an important expansion of studies on ion beam modification of solid materials, vastly different from and more complex than the latter. Among other novelties, we have focused our interest on ion beam bombardment effects on plant and bacterial cell envelopes and tried to understand mechanisms involved in ion beam-induced gene transfer. Through a comprehensive investigation, we have discovered ion beam-induced formation of nanocrater-like structures in the cell envelope, a general phenomenon of ion beam bombardment of cells, these structures may act as pathways for exogenous macromolecule transfer. We have also quantitatively obtained abnormally great penetration depth and sputtering of ions in the cell envelope. All these results are significantly advantageous for ion beam processing of biological cells. (c) 2007 ElsevierB.V. All rights reserved. C1 Chiang Mai Univ, Fac Sci, Dept Phys, Fast Neutron Res Facil, Chiang Mai 50200, Thailand. Chiang Mai Univ, Fac Sci, Dept Biol, Mol Biol Lab, Chiang Mai 50200, Thailand. Chiang Mai Univ, Inst Sci & Technol Res & Dev, Chiang Mai 50200, Thailand. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Yu, LD (reprint author), Chiang Mai Univ, Fac Sci, Dept Phys, Fast Neutron Res Facil, Chiang Mai 50200, Thailand. EM yuld@fnrf.science.cmu.ac.th NR 15 TC 16 Z9 17 U1 0 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 AUG 5 PY 2007 VL 201 IS 19-20 BP 8055 EP 8061 DI 10.1016/j.surfcoat.2005.12.051 PG 7 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 204HG UT WOS:000249034000013 ER PT J AU Nikolaev, A Oks, EM Savkin, K Yushkov, GY Brenner, DJ Johnson, G Randers-Pehrson, G Brown, IG MacGill, RA AF Nikolaev, A. Oks, E. M. Savkin, K. Yushkov, G. Yu. Brenner, D. J. Johnson, G. Randers-Pehrson, G. Brown, I. G. MacGill, R. A. TI Surface resistivity tailoring of ceramic insulators for an ion microprobe application SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 14th International Conference on Surface Modification by Ion Beams (SMMIB 05) CY SEP 04-09, 2005 CL Kusadasi, TURKEY SP TUBITAK, Ege Univ, AKZ NOBEL KEMIPOL A S, ESBAS, HIPOKRAT A S, EYUP ALTAN, MEHMET ALTAN, MUSTAFA ALTAN, Off Naval Res Global, CemeCon Scandinavia, EBSO, Ford Otosan, Turk Otomobil Fabridasi, Egen Otomotiv Sanayi ve Ticaret A S, Kale Kahp Makina ve Kalp Sanayi A S, Canakkale Seramilk Kalevodur, Kale Grp, Ege Univ Sci & Technol Ctr, Mat Res Soc DE ion implantation; surface resisitivity; surface flashover; metal ions; ion optics ID IMPLANTATION AB An important technique used for the grading of voltage drop along high voltage ceramic insulators is to provide some surface conduction to bleed off accumulated surface charge. We have used metal ion implantation to modify the surface of high voltage ceramic vacuum insulators to provide a uniform surface resistivity of order 10(10) Omega/square. A vacuum arc ion source based implanter was used to implant Pt at an energy of about 125 keV to a dose of order 10(16) ions/cm(2) into the surface of ceramic rods used to support the ion focusing system of the Columbia University high voltage ion microprobe. Here we describe the experimental set-up used to do the ion implantation and summarize the results of our exploratory work on implantation into test coupons and into the ceramic rods. (c) 2007 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Russian Acad Sci, Inst High Current Elect, Tomsk 634055, Russia. Columbia Univ, RARAF, Irvington, NY 10533 USA. RP Brown, IG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM igbrown@lbl.gov RI Oks, Efim/A-9409-2014; Yushkov, Georgy/O-8024-2015; Nikolaev, Alexey/R-2154-2016 OI Oks, Efim/0000-0002-9323-0686; Yushkov, Georgy/0000-0002-7615-6058; Nikolaev, Alexey/0000-0003-2724-3697 NR 12 TC 13 Z9 14 U1 1 U2 1 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 AUG 5 PY 2007 VL 201 IS 19-20 BP 8120 EP 8122 DI 10.1016/j.surfcoat.2006.10.051 PG 3 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 204HG UT WOS:000249034000024 ER PT J AU Hollerman, WA Bergeron, NP Goedeke, SM Allison, SW Muntele, CI Ila, D Moore, RJ AF Hollerman, W. A. Bergeron, N. P. Goedeke, S. M. Allison, S. W. Muntele, C. I. Ila, D. Moore, R. J. TI Annealing effects of tribolurninescence production on irradiated ZnS : Mn SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 14th International Conference on Surface Modification by Ion Beams (SMMIB 05) CY SEP 04-09, 2005 CL Kusadasi, TURKEY SP TUBITAK, EGE Univ, AKZ NOBEL KEMIPOL A S, ESBAS, HIPOKRAT A S, EYUP ALTAN, MEHMET ALTAN, MUSTAFA ALTAN, Off Naval Res Global, CemeCon Scandinavia, EBSO, Ford Otosan, Turk Otomobil Fabridasi, Egen Otomotiv Sanayi ve Ticaret A S, Kale Kahp Makina ve Kalp Sanayi A S, Canakkale Seramilk Kalevodur, Kale Grp, Ege Univ Sci & Technol Ctr, Mat Res Soc DE triboluminescence; ZnS : Mn; ion irradiation ID TRIBOLUMINESCENT MATERIALS AB The current interest in returning to the Moon and Mars by 2030 makes cost effective and low mass health monitoring sensors essential for spacecraft development. In space, there are many surface measurements that are required to monitor the condition of the spacecraft including: surface temperature, radiation fluence, and impact. Through the use of phosphors, materials doped with trace elements that give off visible light when excited, these conditions can be monitored. Practical space-based phosphor sensors will depend heavily upon research investigating the resistance of phosphors to ionizing radiation and the ability to anneal or self-heal from damage caused by ionizing radiation. Preliminary investigations into these sensors have recently been performed using a highly triboluminescent phosphor, ZnS:Mn. This phosphor has been found to be temperature sensitive from 100 to 350 degrees C and responsive to both impact and radiation fluence. A 3 MeV proton fluence as small as 2.3 x 10(13) MM-2 was found to statistically reduce the ZnS:Mn fluorescence decay time for temperatures less than 200 degrees C. Reductions in decay time appear to be proportional to increasing fluence. These results have stimulated research into the effects of thermal annealing on triboluminescence. While this testing is not all-inclusive; it does illuminate the process that can be used in the selection of appropriate sensor materials. (C) 2007 Elsevier B.V. All rights reserved. C1 Univ SW Louisiana, Dept Phys, Lafayette, LA 70504 USA. Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN 37831 USA. Alabama A&M Univ, Ctr Irradiat Mat, Normal, AL 35762 USA. RP Hollerman, WA (reprint author), Univ SW Louisiana, Dept Phys, POB 44210, Lafayette, LA 70504 USA. EM holiennan@louisiana.edu RI Hollerman, William/F-5943-2011; OI Allison, Stephen/0000-0002-5887-5403 NR 12 TC 3 Z9 3 U1 1 U2 5 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 AUG 5 PY 2007 VL 201 IS 19-20 BP 8382 EP 8387 DI 10.1016/j.surfcoat.2006.10.054 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 204HG UT WOS:000249034000080 ER PT J AU Ueda, A Wu, M Aga, R Meldrum, A White, CW Collins, WE Mu, R AF Ueda, A. Wu, M. Aga, R. Meldrum, A. White, C. W. Collins, W. E. Mu, R. TI Temperature dependence and annealing effects of absorption edges for selenium quantum dots formed by ion implantation in silica glass SO SURFACE & COATINGS TECHNOLOGY LA English DT Article; Proceedings Paper CT 14th International Conference on Surface Modification by Ion Beams (SMMIB 05) CY SEP 04-09, 2005 CL Kusadasi, TURKEY SP TUBITAK, EGE Univ, AKZ NOBEL KEMIPOL A S, ESBAS, HIPOKRAT A S, EYUP ALTAN, MEHMET ALTAN, MUSTAFA ALTAN, Off Naval Res Global, CemeCon Scandinavia, EBSO, Ford Otosan, Turk Otomobil Fabridasi, Egen Otomotiv Sanayi ve Ticaret A S, Kale Kahp Makina ve Kalp Sanayi A S, Canakkale Seramilk Kalevodur, Kale Grp, Ege Univ Sci & Technol Ctr, Mat Res Soc DE ion implantation selenium (Se); nanoparticles; Tauc analysis AB We have fabricated Se nanoparticles in silica substrates by ion implantation followed by thermal annealing up to 1000 degrees C, and studied the Se nanoparticle formation by optical absorption spectroscopy, Rutherford backscattering spectrometry, X-ray diffraction, and transmission electron microscopy. The sample with the highest dose (1 X 10(17) ions/cm(2)) showed the nanoparticle formation during the ion implantation, while the lower dose samples (1 and 3 x 10(16) ions/cm(2)) required thermal treatment to obtain nano-sized particles. The Se nanoparticles in silica were found to be amorphous. After thermal annealing, the particle sizes became larger than the exciton Bohr radius for bulk Se. Thus, the absorption edges for different doses approached the value of bulk after thermal annealing. The temperature dependent absorption spectra were also measured for this system in a temperature range from 15 to 300 K. (C) 2007 Elsevier B.V. All rights reserved. C1 Fisk Univ, Dept Phys, Nanoscale Mat & Sensors Lab, Nashville, TN 37208 USA. Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada. Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37830 USA. RP Ueda, A (reprint author), Fisk Univ, Dept Phys, Nanoscale Mat & Sensors Lab, 1000 17th Ave N, Nashville, TN 37208 USA. EM aueda@fisk.edu NR 10 TC 1 Z9 1 U1 1 U2 5 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 AUG 5 PY 2007 VL 201 IS 19-20 BP 8542 EP 8546 DI 10.1016/j.surfcoat.2006.02.074 PG 5 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA 204HG UT WOS:000249034000113 ER PT J AU Sun, YG Rogers, JA AF Sun, Yugang Rogers, John A. TI Inorganic semiconductors for flexible electronics SO ADVANCED MATERIALS LA English DT Review ID THIN-FILM TRANSISTORS; FIELD-EFFECT TRANSISTORS; CHEMICAL-VAPOR-DEPOSITION; MICROCRYSTALLINE SILICON FILMS; ONE-DIMENSIONAL NANOSTRUCTURES; CARBON NANOTUBE NETWORKS; TRANSPARENT OXIDE SEMICONDUCTOR; HIGH-PERFORMANCE ELECTRONICS; LOW SUBSTRATE TEMPERATURES; STAINLESS-STEEL FOILS AB This article reviews several classes of inorganic semiconductor materials that can be used to form high-performance, thin-film transistors (TFTs) for large area, flexible electronics. Examples ranging from thin films of various forms of silicon to nanoparticles and nanowires of compound semiconductors are presented, with an emphasis on methods of depositing and integrating thin films of these materials into devices. Performance characteristics, including both electrical and mechanical behavior, for isolated transistors as well as circuits with various levels of complexity are reviewed. Collectively, the results suggest that flexible or printable inorganic materials may be attractive for a range of applications not only in flexible but also in large-area electronics, from existing devices such as flat-panel displays to more challenging (in terms of both cost and performance requirements) systems such as large area radio-frequency communication devices, structural health monitors, and conformal X-ray imagers. C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. Univ Illinois, Dept Mat Sci & Engn, Beckman Inst, Urbana, IL 61801 USA. Univ Illinois, Frederick Seitz Mat Res Lab, Urbana, IL 61801 USA. RP Sun, YG (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. EM ygsun@anl.gov; jrogers@uiuc.edu RI Sun, Yugang /A-3683-2010; 李, 府中/H-4357-2011; Rogers, John /L-2798-2016 OI Sun, Yugang /0000-0001-6351-6977; NR 194 TC 435 Z9 439 U1 53 U2 367 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA POSTFACH 101161, 69451 WEINHEIM, GERMANY SN 0935-9648 EI 1521-4095 J9 ADV MATER JI Adv. Mater. PD AUG 3 PY 2007 VL 19 IS 15 BP 1897 EP 1916 DI 10.1002/adma.200602223 PG 20 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 199PE UT WOS:000248706900001 ER PT J AU Holesinger, TG Jia, QX Maiorov, B Civale, L Dowden, PC Gibbons, BJ AF Holesinger, Terry G. Jia, Quanxi Maiorov, Boris Civale, Leonardo Dowden, Paul C. Gibbons, Brady J. TI Ultrafine multilayers of complex metal oxide films SO ADVANCED MATERIALS LA English DT Article ID YBA2CU3O7-X THIN-FILMS; BEAM-ASSISTED DEPOSITION; PULSED-LASER DEPOSITION; HIGH CRITICAL CURRENTS; COATED CONDUCTORS; CURRENT DENSITIES; DEFECT STRUCTURE; GROWTH; HETEROSTRUCTURES; SUPERLATTICES AB Thick films containing ultrafine multilayer structures of two complex metal oxides are grown with a single, sectored target in conjunction with pulsed laser deposition on stationary or moving templates. This process is demonstrated with the high-temperature superconductors YBa2Cu3Oy and EuBa2Cu3Oy,. Multilayer periodicities (see figure) as low as 5.5 nm (approximately five unit cells) are obtained in thick films (1.84 mu m approximate to 335 bilayer pairs) with improved superconducting properties. C1 Los Alamos Natl Lab, Los Alamos, NM USA. Oregon State Univ, Dept Mech Engn, Corvallis, OR 97331 USA. RP Holesinger, TG (reprint author), Los Alamos Natl Lab, MS G755, Los Alamos, NM USA. EM holesinger@lanl.gov RI Jia, Q. X./C-5194-2008; OI Maiorov, Boris/0000-0003-1885-0436; Civale, Leonardo/0000-0003-0806-3113 NR 33 TC 8 Z9 8 U1 0 U2 11 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0935-9648 J9 ADV MATER JI Adv. Mater. PD AUG 3 PY 2007 VL 19 IS 15 BP 1917 EP + DI 10.1002/adma.200602743 PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 199PE UT WOS:000248706900002 ER PT J AU Hoy, JA Robinson, H Trent, JT Kakar, S Smagghe, BJ Hargrove, MS AF Hoy, Julie A. Robinson, Howard Trent, James T., III Kakar, Smita Smagghe, Benoit J. Hargrove, Mark S. TI Plant hemoglobins: A molecular fossil record for the evolution of oxygen transport SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE hexacoordinate hemoglobin; plant hemoglobins; barley hemoglobin; oxygen transport; evolution ID SIDE-CHAIN INTERACTIONS; HEXACOORDINATE HEMOGLOBIN; CYTOCHROME B(5); LIGAND-BINDING; HEME-BINDING; CRYSTAL-STRUCTURE; ESCHERICHIA-COLI; DISTAL HISTIDINE; NEAR-SEQUENCE; GLOBIN FAMILY AB The evolution of oxygen transport hemoglobins occurred on at least two independent occasions. The earliest event led to myoglobin and red blood cell hemoglobin in animals. In plants, oxygen transport "leghemoglobins" evolved much more recently. In both events, pentacoordinate heme sites capable of inert oxygen transfer evolved from hexacoordinate hemoglobins that have unrelated functions. High sequence homology between hexacoordinate and pentacoordinate hemoglobins in plants has poised them for potential structural analysis leading to a molecular understanding of this important evolutionary event. However, the lack of a plant hexacoordinate hemoglobin structure in the exogenously ligand-bound form has prevented such comparison. Here we report the crystal structure of the cyanide-bound hexacoordinate hemoglobin from barley. This presents the first opportunity to examine conformational changes in plant hexacoordinate hemoglobins upon exogenous ligand binding, and reveals structural mechanisms for stabilizing the high-energy pentacoordinate heme conformation critical to the evolution of reversible oxygen binding hemoglobins. (c) 2007 Elsevier Ltd. All rights reserved. C1 Iowa State Univ, Dept Biochem Biophys & Mol Biol, Ames, IA 50011 USA. Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. RP Hargrove, MS (reprint author), Iowa State Univ, Dept Biochem Biophys & Mol Biol, Ames, IA 50011 USA. EM msh@iastate.edu FU NIGMS NIH HHS [R01-GM065948] NR 68 TC 47 Z9 49 U1 0 U2 8 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD AUG 3 PY 2007 VL 371 IS 1 BP 168 EP 179 DI 10.1016/j.jmb.2007.05.029 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 195IT UT WOS:000248406600014 PM 17560601 ER PT J AU Aaltonen, T Abulencia, A Adelman, J Affolder, T Akimoto, T Albrow, MG Amerio, S Amidei, D Anastassov, A Anikeev, K Annovi, A Antos, J Aoki, M Apollinari, G Arisawa, T Artikov, A Ashmanskas, W Attal, A Aurisano, A Azfar, F Azzi-Bacchetta, P Azzurri, P Bacchetta, N Badgett, W Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Bartsch, V Bauer, G Beauchemin, PH Bedeschi, F Behari, S Bellettini, G Bellinger, J Belloni, A Benjamin, D Beretvas, A Beringer, J Berry, T Bhatti, A Binkley, M Bisello, D Bizjak, I Blair, RE Blocker, C Blumenfeld, B Bocci, A Bodek, A Boisvert, V Bolla, G Bolshov, A Bortoletto, D Boudreau, J Boveia, A Brau, B Brigliadori, L Bromberg, C Brubaker, E Budagov, J Budd, HS Budd, S Burkett, K Busetto, G Bussey, P Buzatu, A Byrum, KL Cabrera, S Campanelli, M Campbell, M Canelli, F Canepa, A Carrillo, S Carlsmith, D Carosi, R Carron, S Casal, B Casarsa, M Castro, A Catastini, P Cauz, D Cavalli-Sforza, M Cerri, A Cerrito, L Chang, SH Chen, YC Chertok, M Chiarelli, G Chlachidze, G Chlebana, F Cho, I Cho, K Chokheli, D Chou, JP Choudalakis, G Chuang, SH Chung, K Chung, WH Chung, YS Cilijak, M Ciobanu, CI Ciocci, MA Clark, A Clark, D Coca, M Compostella, G Convery, ME Conway, J Cooper, B Copic, K Cordelli, M Cortiana, G Crescioli, F Almenar, CC Cuevas, J Culbertson, R Cully, JC DaRonco, S Datta, M D'Auria, S Davies, T Dagenhart, D de Barbaro, P De Cecco, S Deisher, A De Lentdecker, G De Lorenzo, G Dell'Orso, M Paoli, FD Demortier, L Deng, J Deninno, M De Pedis, D Derwent, PF Di Giovanni, GP Dionisi, C Di Ruzza, B Dittmann, JR D'Onofrio, M Dorr, C Donati, S Dong, P Donini, J Dorigo, T Dube, S Efron, J Erbacher, R Errede, D Errede, S Eusebi, R Fang, HC Farrington, S Fedorko, I Fedorko, WT Feild, RG Feindt, M Fernandez, JP Field, R Flanagan, G Forrest, R Forrester, S Franklin, M Freeman, JC Furic, I Gallinaro, M Galyardt, J Garcia, JE Garberson, F Garfinkel, AF Gay, C Gerberich, H Gerdes, D Giagu, S Giannetti, P Gibson, K Gimmell, JL Ginsburg, C Giokaris, N Giordani, M Giromini, P Giunta, M Giurgiu, G Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Golossanov, A Gomez, G Gomez-Ceballos, G Goncharov, M Gonzalez, O Gorelov, I Goshaw, AT Goulianos, K Gresele, A Grinstein, S Grosso-Pilcher, C Group, RC Grundler, U da Costa, JG Gunay-Unalan, Z Haber, C Hahn, K Hahn, SR Halkiadakis, E Hamilton, A Han, BY Han, JY Handler, R Happacher, F Hara, K Hare, D Hare, M Harper, S Harr, RF Harris, RM Hartz, M Hatakeyama, K Hauser, J Hays, C Heck, M Heijboer, A Heinemann, B Heinrich, J Henderson, C Herndon, M Heuser, J Hidas, D Hill, CS Hirschbuehl, D Hocker, A Holloway, A Hou, S Houlden, M Hsu, SC Huffman, BT Hughes, RE Husemann, U Huston, J Incandela, J Introzzi, G Iori, M Ivanov, A Iyutin, B James, E Jang, D Jayatilaka, B Jeans, D Jeon, EJ Jindariani, S Johnson, W Jones, M Joo, KK Jun, SY Jung, JE Junk, TR Kamon, T Karchin, PE Kato, Y Kemp, Y Kephart, R Kerzel, U Khotilovich, V Kilminster, B Kim, DH Kim, HS Kim, JE Kim, MJ Kim, SB Kim, SH Kim, YK Kimura, N Kirsch, L Klimenko, S Klute, M Knuteson, B Ko, BR Kondo, K Kong, DJ Konigsberg, J Korytov, A Kotwal, AV Kraan, AC Kraus, J Kreps, M Kroll, J Krumnack, N Kruse, M Krutelyov, V Kubo, T Kuhlmann, SE Kuhr, T Kulkarni, NP Kusakabe, Y Kwang, S Laasanen, AT Lai, S Lami, S Lammel, S Lancaster, M Lander, RL Lannon, K Lath, A Latino, G Lazzizzera, I LeCompte, T Lee, J Lee, J Lee, YJ Lee, SW Lefevre, R Leonardo, N Leone, S Levy, S Lewis, JD Lin, C Lin, CS Lindgren, M Lipeles, E Lister, A Litvintsev, DO Liu, T Lockyer, NS Loginov, A Loreti, M Lu, RS Lucchesi, D Lujan, P Lukens, P Lungu, G Lyons, L Lys, J Lysak, R Lytken, E Mack, P MacQueen, D Madrak, R Maeshima, K Makhoul, K Maki, T Maksimovic, P Malde, S Malik, S Manca, G Manousakis, A Margaroli, F Marginean, R Marino, C Marino, CP Martin, A Martin, M Martin, V Martinez, M Martinez-Ballarin, R Maruyama, T Mastrandrea, P Masubuchi, T Matsunaga, H Mattson, ME Mazini, R Mazzanti, P McFarland, KS McIntyre, P McNulty, R Mehta, A Mehtala, P Menzemer, S Menzione, A Merkel, P Mesropian, C Messina, A Miao, T Miladinovic, N Miles, J Miller, R Mills, C Milnik, M Mitra, A Mitselmakher, G Miyamoto, A Moed, S Moggi, N Mohr, B Moon, CS Moore, R Morello, M Fernandez, PM Mulmenstadt, J Mukherjee, A Muller, T Mumford, R Murat, P Mussini, M Nachtman, J Nagano, A Naganoma, J Nakamura, K Nakano, I Napier, A Necula, V Neu, C Neubauer, MS Nielsen, J Nodulman, L Norniella, O Nurse, E Oh, SH Oh, YD Oksuzian, I Okusawa, T Oldeman, R Orava, R Osterberg, K Pagliarone, C Palencia, E Papadimitriou, V Papaikonomou, A Paramonov, AA Parks, B Pashapour, S Patrick, J Pauletta, G Paulini, M Paus, C Pellett, DE Penzo, A Phillips, TJ Piacentino, G Piedra, J Pinera, L Pitts, K Plager, C Pondrom, L Portell, X Poukhov, O Pounder, N Prakoshyn, F Pronko, A Proudfoot, J Ptohos, F Punzi, G Pursley, J Rademacker, J Rahaman, A Ramakrishnan, V Ranjan, N Redondo, I Reisert, B Rekovic, V Renton, P Rescigno, M Richter, S Rimondi, F Ristori, L Robson, A Rodrigo, T Rogers, E Rolli, S Roser, R Rossi, M Rossin, R Roy, P Ruiz, A Russ, J Rusu, V Saarikko, H Safonov, A Sakumoto, WK Salamanna, G Salto, O Santi, L Sarkar, S Sartori, L Sato, K Savard, P Savoy-Navarro, A Scheidle, T Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Schwarz, T Scodellaro, L Scott, AL Scribano, A Scuri, F Sedov, A Seidel, S Seiya, Y Semenov, A Sexton-Kennedy, L Sfyrla, A Shalhout, SZ Shapiro, MD Shears, T Shepard, PF Sherman, D Shimojima, M Shochet, M Shon, Y Shreyber, I Sidoti, A Sinervo, P Sisakyan, A Slaughter, AJ Slaunwhite, J Sliwa, K Smith, JR Snider, FD Snihur, R Soderberg, M Soha, A Somalwar, S Sorin, V Spalding, J Spinella, F Spreitzer, T Squillacioti, P Stanitzki, M Staveris-Polykalas, A Denis, RS Stelzer, B Stelzer-Chilton, O Stentz, D Strologas, J Stuart, D Suh, JS Sukhanov, A Sun, H Suslov, I Suzuki, T Taffard, A Takashima, R Takeuchi, Y Tanaka, R Tecchio, M Teng, PK Terashi, K Thom, J Thompson, AS Thomson, E Tipton, P Tiwari, V Tkaczyk, S Toback, D Tokar, S Tollefson, K Tomura, T Tonelli, D Torre, S Torretta, D Tourneur, S Trischuk, W Tsuno, S Tu, Y Turini, N Ukegawa, F Uozumi, S Vallecorsa, S van Remortel, N Varganov, A Vataga, E Vazquez, F Velev, G Vellidis, C Veramendi, G Veszpremi, V Vidal, M Vidal, R Vila, I Vilar, R Vine, T Vogel, M Vollrath, I Volobouev, I Volpi, G Wurthwein, F Wagner, P Wagner, RG Wagner, RL Wagner, J Wagner, W Wallny, R Wang, SM Warburton, A Waters, D Weinberger, M Wester, WC Whitehouse, B Whiteson, D Wicklund, AB Wicklund, E Williams, G Williams, HH Wilson, P Winer, BL Wittich, P Wolbers, S Wolfe, C Wright, T Wu, X Wynne, SM Yagil, A Yamamoto, K Yamaoka, J Yamashita, T Yang, C Yang, UK Yang, YC Yao, WM Yeh, GP Yoh, J Yorita, K Yoshida, T Yu, GB Yu, I Yu, SS Yun, JC Zanello, L Zanetti, A Zaw, I Zhang, X Zhou, J Zucchelli, S AF Aaltonen, T. Abulencia, A. Adelman, J. Affolder, T. Akimoto, T. Albrow, M. G. Amerio, S. Amidei, D. Anastassov, A. Anikeev, K. Annovi, A. Antos, J. Aoki, M. Apollinari, G. Arisawa, T. Artikov, A. Ashmanskas, W. Attal, A. Aurisano, A. Azfar, F. Azzi-Bacchetta, P. Azzurri, P. Bacchetta, N. Badgett, W. Barbaro-Galtieri, A. Barnes, V. E. Barnett, B. A. Baroiant, S. Bartsch, V. Bauer, G. Beauchemin, P.-H. Bedeschi, F. Behari, S. Bellettini, G. Bellinger, J. Belloni, A. Benjamin, D. Beretvas, A. Beringer, J. Berry, T. Bhatti, A. Binkley, M. Bisello, D. Bizjak, I. Blair, R. E. Blocker, C. Blumenfeld, B. Bocci, A. Bodek, A. Boisvert, V. Bolla, G. Bolshov, A. Bortoletto, D. Boudreau, J. Boveia, A. Brau, B. Brigliadori, L. Bromberg, C. Brubaker, E. Budagov, J. Budd, H. S. Budd, S. Burkett, K. Busetto, G. Bussey, P. Buzatu, A. Byrum, K. L. Cabrera, S. Campanelli, M. Campbell, M. Canelli, F. Canepa, A. Carrillo, S. Carlsmith, D. Carosi, R. Carron, S. Casal, B. Casarsa, M. Castro, A. Catastini, P. Cauz, D. 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TI Observation and mass measurement of the baryon Xi(-)(b) SO PHYSICAL REVIEW LETTERS LA English DT Article ID HADRONIC COLLISIONS; QUARK PRODUCTION; CROSS-SECTION; HEAVY AB We report the observation and measurement of the mass of the bottom, strange baryon Xi(-)(b) through the decay chain Xi(-)(b)-->J/psi Xi(-), where J/psi-->mu(+)mu(-), Xi(-)-->Lambda pi(-), and Lambda-->p pi(-). A signal is observed whose probability of arising from a background fluctuation is 6.6 x 10(-15), or 7.7 Gaussian standard deviations. The Xi(-)(b) mass is measured to be 5792.9 +/- 2.5(stat) +/- 1.7(syst) MeV/c(2). C1 Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Autonoma Barcelona, Dept Fis Altes Energies, E-08193 Barcelona, Spain. Baylor Univ, Waco, TX 76798 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Inst Expt Phys, Kosice 04001, Slovakia. Comenius Univ, Bratislava 84248, Slovakia. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Florida, Gainesville, FL 32611 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva 4, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Univ Helsinki, Dept Phys, Div High Energy Phys, FIN-00014 Helsinki, Finland. Helinski Inst Phys, FIN-00014 Helsinki, Finland. Univ Illinois, Urbana, IL 61801 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 305, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. UCL, London WC1E 6BT, England. CIEMAT, E-28040 Madrid, Spain. MIT, Cambridge, MA 02139 USA. McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada. Univ Toronto, Toronto, ON M5S 1A7, Canada. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Okayama Univ, Okayama 7008530, Japan. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, LPNHE,IN2P3, CNRS, UMR7585, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, I-56127 Siena, Italy. Scuola Normale Super Pisa, I-56127 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sezione Roma 1, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Wayne State Univ, Detroit, MI 48201 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Aaltonen, T (reprint author), Acad Sinica, Inst Phys, Taipei 11529, Taiwan. RI Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Leonardo, Nuno/M-6940-2016; Canelli, Florencia/O-9693-2016; Moon, Chang-Seong/J-3619-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Russ, James/P-3092-2014; Lazzizzera, Ignazio/E-9678-2015; Cabrera Urban, Susana/H-1376-2015; Garcia, Jose /H-6339-2015; ciocci, maria agnese /I-2153-2015; Cavalli-Sforza, Matteo/H-7102-2015; Muelmenstaedt, Johannes/K-2432-2015; Introzzi, Gianluca/K-2497-2015; Martinez Ballarin, Roberto/K-9209-2015; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Lysak, Roman/H-2995-2014; Ivanov, Andrew/A-7982-2013; Ruiz, Alberto/E-4473-2011; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; manca, giulia/I-9264-2012; Amerio, Silvia/J-4605-2012; Annovi, Alberto/G-6028-2012; messina, andrea/C-2753-2013; Robson, Aidan/G-1087-2011; De Cecco, Sandro/B-1016-2012 OI Osterberg, Kenneth/0000-0003-4807-0414; Goldstein, Joel/0000-0003-1591-6014; Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399; Leonardo, Nuno/0000-0002-9746-4594; Canelli, Florencia/0000-0001-6361-2117; Hays, Chris/0000-0003-2371-9723; Farrington, Sinead/0000-0001-5350-9271; Robson, Aidan/0000-0002-1659-8284; Torre, Stefano/0000-0002-7565-0118; Moon, Chang-Seong/0000-0001-8229-7829; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Russ, James/0000-0001-9856-9155; Lazzizzera, Ignazio/0000-0001-5092-7531; ciocci, maria agnese /0000-0003-0002-5462; Muelmenstaedt, Johannes/0000-0003-1105-6678; Introzzi, Gianluca/0000-0002-1314-2580; Martinez Ballarin, Roberto/0000-0003-0588-6720; Warburton, Andreas/0000-0002-2298-7315; Ivanov, Andrew/0000-0002-9270-5643; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Annovi, Alberto/0000-0002-4649-4398; NR 20 TC 92 Z9 92 U1 1 U2 9 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. 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PD AUG 3 PY 2007 VL 99 IS 5 AR 052002 DI 10.1103/PhysRevLett.99.052002 PG 7 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500013 PM 17930745 ER PT J AU Abazov, VM Abbott, B Abolins, M Acharya, BS Adams, M Adams, T Aguilo, E Ahn, SH Ahsan, M Alexeev, GD Alkhazov, G Alton, A Alverson, G Alves, GA Anastasoaie, M Ancu, LS Andeen, T Anderson, S Andrieu, B Anzelc, MS Arnoud, Y Arov, M Arthaud, M Askew, A Asman, B Jesus, ACSA Atramentov, O Autermann, C Avila, C Ay, C Badaud, F Baden, A Bagby, L Baldin, B Bandurin, DV Banerjee, S Banerjee, P Barberis, E Barfuss, AF Bargassa, P Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Beale, S Bean, A Begalli, M Begel, M Belanger-Champagne, C Bellantoni, L Bellavance, A Benitez, JA Beri, SB Bernardi, G Bernhard, R Berntzon, L Bertram, I Besancon, M Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Biscarat, C Blazey, G Blekman, F Blessing, S Bloch, D Bloom, K Boehnlein, A Boline, D Bolton, TA Borissov, G Bos, K Bose, T Brandt, A Brock, R Brooijmans, G Bross, A Brown, D Buchanan, NJ Buchholz, D Buehler, M Buescher, V Burdin, S Burke, S Burnett, TH Buszello, CP Butler, JM Calfayan, P Calvet, S Cammin, J Caron, S Carvalho, W Casey, BCK Cason, NM Castilla-Valdez, H Chakrabarti, S Chakraborty, D Chan, KM Chan, K Chandra, A Charles, F Cheu, E Chevallier, F Cho, DK Choi, S Choudhary, B Christofek, L Christoudias, T Cihangir, S Claes, D Clement, C Clement, B Coadou, Y Cooke, M Cooper, WE Corcoran, M Couderc, F Cousinou, MC Crepe-Renaudin, S Cutts, D Cwiok, M da Motta, H Das, A Davies, G De, K de Jong, SJ de Jong, P De La Cruz-Burelo, E Martins, CD Degenhardt, JD Deliot, F Demarteau, M Demina, R Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Dominguez, A Dong, H Dudko, LV Duflot, L Dugad, SR Duggan, D Duperrin, A Dyer, J Dyshkant, A Eads, M Edmunds, D Ellison, J Elvira, VD Enari, Y Eno, S Ermolov, P Evans, H Evdokimov, A Evdokimov, VN Ferapontov, AV Ferbel, T Fiedler, F Filthaut, F Fisher, W Fisk, HE Ford, M 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Stolin, V. Stone, A. Stoyanova, D. A. Strandberg, J. Strandberg, S. Strang, M. A. Strauss, M. Strauss, E. Stroehmer, R. Strom, D. Strovink, M. Stutte, L. Sumowidagdo, S. Svoisky, P. Sznajder, A. Talby, M. Tamburello, P. Tanasijczuk, A. Taylor, W. Telford, P. Temple, J. Tiller, B. Tissandier, F. Titov, M. Tokmenin, V. V. Tomoto, M. Toole, T. Torchiani, I. Trefzger, T. Tsybychev, D. Tuchming, B. Tully, C. Tuts, P. M. Unalan, R. Uvarov, S. Uvarov, L. Uzunyan, S. Vachon, B. van den Berg, P. J. van Eijk, B. Van Kooten, R. van Leeuwen, W. M. Varelas, N. Varnes, E. W. Vartapetian, A. Vasilyev, I. A. Vaupel, M. Verdier, P. Vertogradov, L. S. Vertogradova, Y. Verzocchi, M. Villeneuve-Seguier, F. Vint, P. Vokac, P. Von Toerne, E. Voutilainen, M. Vreeswijk, M. Wagner, R. Wahl, H. D. Wang, L. Swang, M. H. L. Warchol, J. Watts, G. Wayne, M. Weber, M. Weber, G. Weerts, H. Wenger, A. Wermes, N. Wetstein, M. White, A. Wicke, D. Wilson, G. W. Wimpenny, S. J. Wobisch, M. Wood, D. R. Wyatt, T. R. Xie, Y. Yacoob, S. Yamada, R. Yan, M. Yasuda, T. Yatsunenko, Y. A. Yip, K. Yoo, H. D. Youn, S. W. Yu, J. Yu, C. Yurkewicz, A. Zatserklyaniy, A. Zeitnitz, C. Zhang, D. Zhao, T. Zhou, B. Zhu, J. Zielinski, M. Zieminska, D. Zieminski, A. Zivkovic, L. Zutshi, V. Zverev, E. G. CA D0 Collaboration TI Direct observation of the strange b baryon Xi(-)(b) SO PHYSICAL REVIEW LETTERS LA English DT Article ID Z-DECAYS; LIFETIME; PHYSICS AB We report the first direct observation of the strange b baryon Xi(-)(b)(Xi) over bar (+)(b)). We reconstruct the decay Xi(-)(b)-->J/psi Xi(-), with J/psi-->mu(+)mu(-), and Xi(-)-->Lambda pi(-)-->p pi(-)pi(-) in p (p) over bar collisions at root s = 1.96 TeV. Using 1.3 fb(-1) of data collected by the D0 detector, we observe 15.2 +/- 4.4(stat)(-0.4)(+1.9)(syst) Xi(-)(b) candidates at a mass of 5.774 +/- 0.011(stat) +/- 0.015(syst) GeV. The significance of the observed signal is 5.5 sigma, equivalent to a probability of 3.3 x 10(-8) of it arising from a background fluctuation. Normalizing to the decay Lambda(b)-->J/psi Lambda, we measure the relative rate sigma(Xi(-)(b))xB(Xi(-)(b)-->J/psi Xi)/ sigma(Lambda(b))xB(Lambda(b)-->J/psi Lambda) = 0.28 +/- 0.09(stat)(-0.08)(+0.09)(syst). C1 Univ Michigan, Ann Arbor, MI 48109 USA. Univ Buenos Aires, Buenos Aires, DF, Argentina. LAFEX, Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil. Univ Estado Rio De Janeiro, Rio De Janeiro, Brazil. Univ Estadual Paulista, Inst Fis Teor, BR-01405 Sao Paulo, Brazil. Simon Fraser Univ, Burnaby, BC, Canada. Univ Alberta, Edmonton, AB, Canada. York Univ, Toronto, ON, Canada. McGill Univ, Montreal, PQ, Canada. Univ Sci & Technol China, Hefei, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic. Czech Tech Univ, Prague, Czech Republic. Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco, Quito, Ecuador. Univ Clermont Ferrand, CNRS, IN3P3, Phys Corpusculaire Lab, Clermont Ferrand, France. Univ Grenoble 1, Lab Phys Subatomique & Cosmol, CNRS, IN2P3, Grenoble, France. Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France. Univ Paris 11, Lab Accelerateur Lineaire, CNRS, IN2P3, Orsay, France. Univ Paris 06, CNRS, LPNHE, IN2P3, Paris, France. Univ Paris 07, Paris, France. Univ Strasbourg 1, IPHC, Strasbourg, France. Univ Haute Alsace, CNRS, IN2P3, Strasbourg, France. Univ Lyon 1, IPNL, CNRS, IN2P3, Villeurbanne, France. Univ Lyon, Lyon, France. Rhein Westfal TH Aachen, Inst Phys A 3, Aachen, Germany. Inst Phys, Bonn, Germany. Univ Freiburg, Inst Phys, Freiburg, Germany. Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Univ Munich, Munich, Germany. Univ Wuppertal, Wuppertal, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi 110007, India. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Univ Coll Dublin, Dublin, Ireland. Korea Univ, Korea Detector Lab, Seoul 136701, South Korea. Sungkyunkwan Univ, Suwon, South Korea. CINVESTAV, Mexico City, DF, Mexico. FOM, Inst NIKHEF, Amsterdam, Netherlands. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. Univ Nijmegen St Radboud Hosp, NIKHEF, Nijmegen, Netherlands. Joint Nucl Res Inst, Dubna, Russia. Inst Theoret & Expt Phys, Moscow, Russia. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Petersburg Nucl Phys Inst, St Petersburg, Russia. Lund Univ, Lund, Sweden. Royal Inst Technol, Stockholm, Sweden. Univ Stockholm, Stockholm, Sweden. Uppsala Univ, Uppsala, Sweden. Univ Zurich, Inst Phys, Zurich, Switzerland. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci Technol & Med, London, England. Univ Manchester, Manchester, Lancs, England. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Illinois, Chicago, IL 60607 USA. No Illinois Univ, De Kalb, IL 60115 USA. Northwestern Univ, Evanston, IL 60208 USA. Indiana Univ, Bloomington, IN 47405 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Purdue Univ Calumet, Hammond, IN 46323 USA. Iowa State Univ, Ames, IA 50011 USA. Univ Kansas, Lawrence, KS 66045 USA. Kansas State Univ, Manhattan, KS 66506 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Univ Maryland, College Pk, MD 20742 USA. Boston Univ, Boston, MA 02215 USA. Northeastern Univ, Boston, MA 02115 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Mississippi, University, MS 38677 USA. Univ Nebraska, Lincoln, NE 68588 USA. Princeton Univ, Princeton, NJ 08544 USA. SUNY Buffalo, Buffalo, NY 14260 USA. Columbia Univ, New York, NY 10027 USA. Univ Rochester, Rochester, NY 14627 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Langston Univ, Langston, OK 73050 USA. Univ Oklahoma, Norman, OK 73019 USA. Oklahoma State Univ, Stillwater, OK 74078 USA. Brown Univ, Providence, RI 02912 USA. Univ Texas, Arlington, TX 76019 USA. So Methodist Univ, Dallas, TX 75275 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. CEA Saclay, DAPNIA, Serv Phys Particules, F-91191 Gif Sur Yvette, France. RP Abazov, VM (reprint author), Univ Michigan, Ann Arbor, MI 48109 USA. RI Merkin, Mikhail/D-6809-2012; Leflat, Alexander/D-7284-2012; Dudko, Lev/D-7127-2012; Shivpuri, R K/A-5848-2010; Telford, Paul/B-6253-2011; Gutierrez, Phillip/C-1161-2011; Mercadante, Pedro/K-1918-2012; Yip, Kin/D-6860-2013; Mundim, Luiz/A-1291-2012; Nomerotski, Andrei/A-5169-2010; Novaes, Sergio/D-3532-2012; Ancu, Lucian Stefan/F-1812-2010; De, Kaushik/N-1953-2013; Fisher, Wade/N-4491-2013; Alves, Gilvan/C-4007-2013; Santoro, Alberto/E-7932-2014; Deliot, Frederic/F-3321-2014; Sharyy, Viatcheslav/F-9057-2014; Christoudias, Theodoros/E-7305-2015; KIM, Tae Jeong/P-7848-2015; Guo, Jun/O-5202-2015; Sznajder, Andre/L-1621-2016; Li, Liang/O-1107-2015; OI Dudko, Lev/0000-0002-4462-3192; Yip, Kin/0000-0002-8576-4311; Mundim, Luiz/0000-0001-9964-7805; Novaes, Sergio/0000-0003-0471-8549; Ancu, Lucian Stefan/0000-0001-5068-6723; De, Kaushik/0000-0002-5647-4489; Sharyy, Viatcheslav/0000-0002-7161-2616; Christoudias, Theodoros/0000-0001-9050-3880; KIM, Tae Jeong/0000-0001-8336-2434; Guo, Jun/0000-0001-8125-9433; Sznajder, Andre/0000-0001-6998-1108; Li, Liang/0000-0001-6411-6107; Weber, Michele/0000-0002-2770-9031; Grohsjean, Alexander/0000-0003-0748-8494; Melnychuk, Oleksandr/0000-0002-2089-8685; Bassler, Ursula/0000-0002-9041-3057; Filthaut, Frank/0000-0003-3338-2247; Naumann, Axel/0000-0002-4725-0766; Bertram, Iain/0000-0003-4073-4941 NR 14 TC 98 Z9 101 U1 0 U2 7 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 AUG 3 PY 2007 VL 99 IS 5 AR 052001 DI 10.1103/PhysRevLett.99.052001 PG 8 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500012 PM 17930744 ER PT J AU Abouzaid, E Arenton, M Barker, AR Bellantoni, L Blucher, E Bock, GJ Cheu, E Coleman, R Corcoran, MD Cox, B Erwin, AR Glazov, A Golossanov, A Hsiung, YB Jensen, DA Kessler, R Kobrak, HGE Kotera, K LaDue, J Ledovskoy, A McBride, PL Monnier, E Nguyen, H Niclasen, R Ramberg, EJ Ray, RE Ronquest, M Shields, J Slater, W Smith, D Solomey, N Swallow, EC Toale, PA Tschirhart, R Wah, YW Wang, J White, HB Whitmore, J Wilking, MJ Winston, R Worcester, ET Yamanaka, T Zimmerman, ED AF Abouzaid, E. Arenton, M. Barker, A. R. Bellantoni, L. Blucher, E. Bock, G. J. Cheu, E. Coleman, R. Corcoran, M. D. Cox, B. Erwin, A. R. Glazov, A. Golossanov, A. Hsiung, Y. B. Jensen, D. A. Kessler, R. Kobrak, H. G. E. Kotera, K. LaDue, J. Ledovskoy, A. McBride, P. L. Monnier, E. Nguyen, H. Niclasen, R. Ramberg, E. J. Ray, R. E. Ronquest, M. Shields, J. Slater, W. Smith, D. Solomey, N. Swallow, E. C. Toale, P. A. Tschirhart, R. Wah, Y. W. Wang, J. White, H. B. Whitmore, J. Wilking, M. J. Winston, R. Worcester, E. T. Yamanaka, T. Zimmerman, E. D. TI Measurements of the decay K-L -> e(+)e(-)gamma SO PHYSICAL REVIEW LETTERS LA English DT Article ID FORM-FACTOR; BRANCHING RATIO; KL->E+E-GAMMA AB The E799-II (KTeV) experiment at Fermilab has collected 83 262 K-L-->e(+)e(-) gamma(gamma) events above a background of 79 events. We measure a decay width, normalized to the K-L-->pi(0)pi(0)pi(0)(D) (pi(0)-->gamma gamma, pi(0)-->gamma gamma, pi(0)(D)-> e(+)e(-)gamma(gamma)) decay width, of Gamma(K-L-->e(+)e(-)gamma(gamma))/Gamma(K-L-->pi(0)pi(0)pi(0)(D)) = (1.3302 +/- 0.0046(stat) +/- 0.0102(syst)) x 10(-3). We also measure parameters of two K-L gamma(*)gamma form factor models. In the Bergstrom-Masso-Singer parametrization, we find C alpha(*)(K)=-0.517 +/- 0.030(stat) +/- 0.022(syst). We separately fit for the first parameter of the D'Ambrosio-Isidori-Portoles model and find alpha(DIP)=-1.729 +/- 0.043(stat) +/- 0.028(syst). C1 Univ Colorado, Boulder, CO 80309 USA. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Elmhurst Coll, Elmhurst, IL 60126 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Osaka Univ, Toyonaka, Osaka 5600043, Japan. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA. Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA. Univ Wisconsin, Madison, WI 53706 USA. RP Winston, R (reprint author), Univ Colorado, Boulder, CO 80309 USA. NR 14 TC 2 Z9 2 U1 0 U2 0 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 AUG 3 PY 2007 VL 99 IS 5 AR 051804 DI 10.1103/PhysRevLett.99.051804 PG 5 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500011 PM 17930743 ER PT J AU Afanasiev, S Aidala, C Ajitanand, NN Akiba, Y Alexander, J Al-Jamel, A Aoki, K Aphecetche, L Armendariz, R Aronson, SH Averbeck, R Awes, TC Azmoun, B Babintsev, V Baldisseri, A Barish, KN Barnes, PD Bassalleck, B Bathe, S Batsouli, S Baublis, V Bauer, F Bazilevsky, A Belikov, S Bennett, R Berdnikov, Y Bjorndal, MT Boissevain, JG Borel, H Boyle, K Brooks, ML Brown, DS Bucher, D Buesching, H Bumazhnov, V Bunce, G Burward-Hoy, JM Butsyk, S Campbell, S Chai, JS Chernichenko, S Chiba, J Chi, CY Chiu, M Choi, IJ Chujo, T Cianciolo, V Cleven, CR Cobigo, Y Cole, BA Comets, MP Constantin, P Csanad, M Csorgo, T Dahms, T Das, K David, G Delagrange, H Denisov, A d'Enterria, D Deshpande, A Desmond, EJ Dietzsch, O Dion, A Drachenberg, JL Drapier, O Drees, A Dubey, AK Durum, A Dzhordzhadze, V Efremenko, YV Egdemir, J Enokizono, A En'yo, H Espagnon, B Esumi, S Fields, DE Fleuret, F Fokin, SL Forestier, B Fraenkel, Z Frantz, JE Franz, A Frawley, AD Fukao, Y Fung, SY Gadrat, S Gastineau, F Germain, M Glenn, A Gonin, M Gosset, J Goto, Y de Cassagnac, RG Grau, N Greene, SV Perdekamp, MG Gunji, T Gustafsson, HA Hachiya, T Henni, AH Haggerty, JS Hagiwara, MN Hamagaki, H Harada, H Hartouni, EP Haruna, K Harvey, M Haslum, E Hasuko, K Hayano, R Heffner, M Hemmick, TK Heuser, JM He, X Hiejima, H Hill, JC Hobbs, R Holmes, M Holzmann, W Homma, K Hong, B Horaguchi, T Hur, MG Ichihara, T Imai, K Inaba, M Isenhower, D Isenhower, L Ishihara, M Isobe, T Issah, M Isupov, A Jacak, BV Jia, J Jin, J Jinnouchi, O Johnson, BM Joo, KS Jouan, D Kajihara, F Kametani, S Kamihara, N Kaneta, M Kang, JH Kawagishi, T Kazantsev, AV Kelly, S Khanzadeev, A Kim, DJ Kim, E Kim, YS Kinney, E Kiss, A Kistenev, E Kiyomichi, A Klein-Boesing, C Kochenda, L Kochetkov, V Komkov, B Konno, M Kotchetkov, D Kozlov, A Kroon, PJ Kunde, GJ Kurihara, N Kurita, K Kweon, MJ Kwon, Y Kyle, GS Lacey, R Lajoie, JG Lebedev, A Le Bornec, Y Leckey, S Lee, DM Lee, MK Leitch, MJ Leite, MAL Lim, H Litvinenko, A Liu, MX Li, XH Maguire, CF Makdisi, YI Malakhov, A Malik, MD Manko, VI Masui, H Matathias, F McCain, MC McGaughey, PL Miake, Y Miller, TE Milov, A Mioduszewski, S Mishra, GC Mitchell, JT Morrison, DP Moss, JM Moukhanova, TV Mukhopadhyay, D Murata, J Nagamiya, S Nagata, Y Nagle, JL Naglis, M Nakamura, T Newby, J Nguyen, M Norman, BE Nyanin, AS Nystrand, J O'Brien, E Ogilvie, CA Ohnishi, H Ojha, ID Okada, H Okada, K Omiwade, OO Oskarsson, A Otterlund, I Ozawa, K Pal, D Palounek, APT Pantuev, V Papavassiliou, V Park, J Park, WJ Pate, SF Pei, H Peng, JC Pereira, H Peresedov, V Peressounko, DY Pinkenburg, C Pisani, RP Purschke, ML Purwar, AK Qu, H Rak, J Ravinovich, I Read, KF Reuter, M Reygers, K Riabov, V Riabov, Y Roche, G Romana, A Rosati, M Rosendahl, SSE Rosnet, P Rukoyatkin, P Rykov, VL Ryu, SS Sahlmueller, B Saito, N Sakaguchi, T Sakai, S Samsonov, V Sato, HD Sato, S Sawada, S Semenov, V Seto, R Sharma, D Shea, TK Shein, I Shibata, TA Shigaki, K Shimomura, M Shohjoh, T Shoji, K Sickles, A Silva, CL Silvermyr, D Sim, KS Singh, CP Singh, V Skutnik, S Smith, WC Soldatov, A Soltz, RA Sondheim, WE Sorensen, SP Sourikova, IV Staley, F Stankus, PW Stenlund, E Stepanov, M Ster, A Stoll, SP Sugitate, T Suire, C Sullivan, JP Sziklai, J Tabaru, T Takagi, S Takagui, EM Taketani, A Tanaka, KH Tanaka, Y Tanida, K Tannenbaum, MJ Taranenko, A Tarjan, P Thomas, TL Togawa, M Tojo, J Torii, H Towell, RS Tram, VN Tserruya, I Tsuchimoto, Y Tuli, SK Tydesjo, H Tyurin, N Vale, C Valle, H vanHecke, HW Velkovska, J Vertesi, R Vinogradov, AA Vznuzdaev, E Wagner, M Wang, XR Watanabe, Y Wessels, J White, SN Willis, N Winter, D Woody, CL Wysocki, M Xie, W Yanovich, A Yokkaichi, S Young, GR Younus, I Yushmanov, IE Zajc, WA Zaudtke, O Zhang, C Zimanyi, J Zolin, L AF Afanasiev, S. Aidala, C. Ajitanand, N. N. Akiba, Y. Alexander, J. Al-Jamel, A. Aoki, K. Aphecetche, L. Armendariz, R. Aronson, S. H. Averbeck, R. Awes, T. C. Azmoun, B. Babintsev, V. Baldisseri, A. Barish, K. N. Barnes, P. D. Bassalleck, B. Bathe, S. Batsouli, S. Baublis, V. Bauer, F. Bazilevsky, A. Belikov, S. Bennett, R. Berdnikov, Y. Bjorndal, M. T. Boissevain, J. G. Borel, H. Boyle, K. Brooks, M. L. Brown, D. S. Bucher, D. Buesching, H. Bumazhnov, V. Bunce, G. Burward-Hoy, J. M. Butsyk, S. Campbell, S. Chai, J.-S. Chernichenko, S. Chiba, J. Chi, C. Y. Chiu, M. Choi, I. J. Chujo, T. Cianciolo, V. Cleven, C. R. Cobigo, Y. Cole, B. A. Comets, M. P. Constantin, P. Csanad, M. Csoergo, T. Dahms, T. Das, K. David, G. Delagrange, H. Denisov, A. d'Enterria, D. Deshpande, A. Desmond, E. J. Dietzsch, O. Dion, A. Drachenberg, J. L. Drapier, O. Drees, A. Dubey, A. K. Durum, A. Dzhordzhadze, V. Efremenko, Y. V. Egdemir, J. Enokizono, A. En'yo, H. Espagnon, B. Esumi, S. Fields, D. E. Fleuret, F. Fokin, S. L. Forestier, B. Fraenkel, Z. Frantz, J. E. Franz, A. Frawley, A. D. Fukao, Y. Fung, S.-Y. Gadrat, S. Gastineau, F. Germain, M. Glenn, A. Gonin, M. Gosset, J. Goto, Y. de Cassagnac, R. Granier Grau, N. Greene, S. V. Perdekamp, M. Grosse Gunji, T. Gustafsson, H.-A. Hachiya, T. Henni, A. Hadj Haggerty, J. S. Hagiwara, M. N. Hamagaki, H. Harada, H. Hartouni, E. P. Haruna, K. Harvey, M. Haslum, E. Hasuko, K. Hayano, R. Heffner, M. Hemmick, T. K. Heuser, J. M. He, X. Hiejima, H. Hill, J. C. Hobbs, R. Holmes, M. Holzmann, W. Homma, K. Hong, B. Horaguchi, T. Hur, M. G. Ichihara, T. Imai, K. Inaba, M. Isenhower, D. Isenhower, L. Ishihara, M. Isobe, T. Issah, M. Isupov, A. Jacak, B. V. Jia, J. Jin, J. Jinnouchi, O. Johnson, B. M. Joo, K. S. Jouan, D. Kajihara, F. Kametani, S. Kamihara, N. Kaneta, M. Kang, J. H. Kawagishi, T. Kazantsev, A. V. Kelly, S. Khanzadeev, A. Kim, D. J. Kim, E. Kim, Y.-S. Kinney, E. Kiss, A. Kistenev, E. Kiyomichi, A. Klein-Boesing, C. Kochenda, L. Kochetkov, V. Komkov, B. Konno, M. Kotchetkov, D. Kozlov, A. Kroon, P. J. Kunde, G. J. Kurihara, N. Kurita, K. Kweon, M. J. Kwon, Y. Kyle, G. S. Lacey, R. Lajoie, J. G. Lebedev, A. Le Bornec, Y. Leckey, S. Lee, D. M. Lee, M. K. Leitch, M. J. Leite, M. A. L. Lim, H. Litvinenko, A. Liu, M. X. Li, X. H. Maguire, C. F. Makdisi, Y. I. Malakhov, A. Malik, M. D. Manko, V. I. Masui, H. Matathias, F. McCain, M. C. McGaughey, P. L. Miake, Y. Miller, T. E. Milov, A. Mioduszewski, S. Mishra, G. C. Mitchell, J. T. Morrison, D. P. Moss, J. M. Moukhanova, T. V. Mukhopadhyay, D. Murata, J. Nagamiya, S. Nagata, Y. Nagle, J. L. Naglis, M. Nakamura, T. Newby, J. Nguyen, M. Norman, B. E. Nyanin, A. S. Nystrand, J. O'Brien, E. Ogilvie, C. A. Ohnishi, H. Ojha, I. D. Okada, H. Okada, K. Omiwade, O. O. Oskarsson, A. Otterlund, I. Ozawa, K. Pal, D. Palounek, A. P. T. Pantuev, V. Papavassiliou, V. Park, J. Park, W. J. Pate, S. F. Pei, H. Peng, J.-C. Pereira, H. Peresedov, V. Peressounko, D. Yu. Pinkenburg, C. Pisani, R. P. Purschke, M. L. Purwar, A. K. Qu, H. Rak, J. Ravinovich, I. Read, K. F. Reuter, M. Reygers, K. Riabov, V. Riabov, Y. Roche, G. Romana, A. Rosati, M. Rosendahl, S. S. E. Rosnet, P. Rukoyatkin, P. Rykov, V. L. Ryu, S. S. Sahlmueller, B. Saito, N. Sakaguchi, T. Sakai, S. Samsonov, V. Sato, H. D. Sato, S. Sawada, S. Semenov, V. Seto, R. Sharma, D. Shea, T. K. Shein, I. Shibata, T.-A. Shigaki, K. Shimomura, M. Shohjoh, T. Shoji, K. Sickles, A. Silva, C. L. Silvermyr, D. Sim, K. S. Singh, C. P. Singh, V. Skutnik, S. Smith, W. C. Soldatov, A. Soltz, R. A. Sondheim, W. E. Sorensen, S. P. Sourikova, I. V. Staley, F. Stankus, P. W. Stenlund, E. Stepanov, M. Ster, A. Stoll, S. P. Sugitate, T. Suire, C. Sullivan, J. P. Sziklai, J. Tabaru, T. Takagi, S. Takagui, E. M. Taketani, A. Tanaka, K. H. Tanaka, Y. Tanida, K. Tannenbaum, M. J. Taranenko, A. Tarjan, P. Thomas, T. L. Togawa, M. Tojo, J. Torii, H. Towell, R. S. Tram, V-N. Tserruya, I. Tsuchimoto, Y. Tuli, S. K. Tydesjoe, H. Tyurin, N. Vale, C. Valle, H. vanHecke, H. W. Velkovska, J. Vertesi, R. Vinogradov, A. A. Vznuzdaev, E. Wagner, M. Wang, X. R. Watanabe, Y. Wessels, J. White, S. N. Willis, N. Winter, D. Woody, C. L. Wysocki, M. Xie, W. Yanovich, A. Yokkaichi, S. Young, G. R. Younus, I. Yushmanov, I. E. Zajc, W. A. Zaudtke, O. Zhang, C. Zimanyi, J. Zolin, L. TI Elliptic flow for phi mesons and (Anti)deuterons in Au+Au collisions at root s(NN)=200 GeV SO PHYSICAL REVIEW LETTERS LA English DT Article ID RELATIVISTIC NUCLEAR COLLISIONS; QUARK-GLUON PLASMA; PHENIX; MATTER; AU AB Differential elliptic flow (v(2)) for phi mesons and (anti)deuterons ((d) over bar )d is measured for Au + Au collisions at root s(NN) = 200 GeV. The v(2) for phi mesons follows the trend of lighter pi(+/-) and K-+/- mesons, suggesting that ordinary hadrons interacting with standard hadronic cross sections are not the primary driver for elliptic flow development. The v(2) values for ((d) over bar )d suggest that elliptic flow is additive for composite particles. This further validation of the universal scaling of v(2) per constituent quark for baryons and mesons suggests that partonic collectivity dominates the transverse expansion dynamics. C1 Abilene Christian Univ, Abilene, TX 79699 USA. Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Tokyo 1130033, Japan. Univ Colorado, Boulder, CO 80309 USA. Columbia Univ, New York, NY 10027 USA. Nevis Lab, Irvington, NY 10027 USA. CEA Saclay, F-91191 Gif Sur Yvette, France. Debrecen Univ, H-4010 Debrecen, Hungary. Eotvos Lorand Univ, ELTE, H-1117 Budapest, Hungary. Florida State Univ, Tallahassee, FL 32306 USA. Georgia State Univ, Atlanta, GA 30303 USA. Hiroshima Univ, Higashihiroshima 7398526, Japan. IHEP Protvino, State Res Ctr Russian Fed, Inst High Energy Phys, Protvino 142281, Russia. Univ Illinois, Urbana, IL 61801 USA. Iowa State Univ, Ames, IA 50011 USA. Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia. KAERI, Cyclotron Applicat Lab, Seoul, South Korea. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. Hungarian Acad Sci, KFKI Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary. Korea Univ, Seoul 136701, South Korea. Kurchatov Inst, Russell Res Ctr, Moscow, Russia. Kyoto Univ, Kyoto 6068502, Japan. Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Clermont Ferrand, LPC, CNRS, IN2P3, F-63177 Clermont Ferrand, France. Lund Univ, Dept Phys, SE-22100 Lund, Sweden. Univ Munster, Inst Kernphys, D-48149 Munster, Germany. Myongji Univ, Yongin 449728, Kyonggido, South Korea. Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan. Univ New Mexico, Albuquerque, NM 87131 USA. New Mexico State Univ, Las Cruces, NM 88003 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Paris 11, IPN, CNRS, IN2P3,BP1, F-91406 Orsay, France. Petersburg Nucl Phys Inst, Gatchina 188300, Leningrad, Russia. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. RIKEN, BNL Res Ctr, Brookhaven Natl Lab, Upton, NY 11973 USA. Rikkyo Univ, Dept Phys, Tokyo 1718501, Japan. St Petersburg State Polytech Univ, St Petersburg, Russia. Univ Sao Paulo, Inst Fis, BR-05315 Sao Paulo, Brazil. Seoul Natl Univ, Syst Elect Lab, Seoul, South Korea. SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Univ Nantes, SUBATECH, CNRS IN2P3, Ecole Mines, F-20722 Nantes, France. Univ Tennessee, Knoxville, TN 37996 USA. Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan. Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan. Vanderbilt Univ, Nashville, TN 37235 USA. Waseda Univ, Adv Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1620044, Japan. Weizmann Inst Sci, IL-76100 Rehovot, Israel. Yonsei Univ, IPAP, Seoul 120749, South Korea. RP Afanasiev, S (reprint author), Abilene Christian Univ, Abilene, TX 79699 USA. EM jacak@skipper.physics.sunysb.edu RI Semenov, Vitaliy/E-9584-2017; seto, richard/G-8467-2011; Csanad, Mate/D-5960-2012; Csorgo, Tamas/I-4183-2012; YANG, BOGEUM/I-8251-2012; Dahms, Torsten/A-8453-2015; En'yo, Hideto/B-2440-2015; Hayano, Ryugo/F-7889-2012; HAMAGAKI, HIDEKI/G-4899-2014; Durum, Artur/C-3027-2014; Sorensen, Soren /K-1195-2016; Yokkaichi, Satoshi/C-6215-2017; Taketani, Atsushi/E-1803-2017 OI Reuter, Michael/0000-0003-3881-8310; Dahms, Torsten/0000-0003-4274-5476; Hayano, Ryugo/0000-0002-1214-7806; Sorensen, Soren /0000-0002-5595-5643; Taketani, Atsushi/0000-0002-4776-2315 NR 41 TC 69 Z9 70 U1 4 U2 7 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 AUG 3 PY 2007 VL 99 IS 5 AR 052301 DI 10.1103/PhysRevLett.99.052301 PG 6 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500014 PM 17930746 ER PT J AU Aubert, B Bona, M Boutigny, D Karyotakis, Y Lees, JP Poireau, V Prudent, X Tisserand, V Zghiche, A Tico, JG Grauges, E Lopez, L Palano, A Eigen, G Ofte, I Stugu, B Sun, L Abrams, GS Battaglia, M Brown, DN Button-Shafer, J Cahn, RN Groysman, Y Jacobsen, RG Kadyk, JA Kerth, LT Kolomensky, YG Kukartsev, G Pegna, DL Lynch, G Mir, LM Orimoto, TJ Pripstein, M Roe, NA Ronan, MT Tackmann, K Wenzel, WA Sanchez, PD Hawkes, CM Watson, AT Held, T Koch, H Lewandowski, B Pelizaeus, M Schroeder, T Steinke, M Boyd, JT Burke, JP Cottingham, WN Walker, D Asgeirsson, DJ Cuhadar-Donszelmann, T Fulsom, BG Hearty, C Knecht, NS Mattison, TS McKenna, JA Khan, A Saleem, M Teodorescu, L Blinov, VE Bukin, AD Druzhinin, VP Golubev, B Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Todyshev, KY Bondioli, M Bruinsma, M Curry, S Eschrich, I Kirkby, D Lankford, AJ Lund, P Mandelkern, M Martin, EC Stoker, DP Abachi, S Buchanan, C Foulkes, SD Gary, JW Liu, F Long, O Shen, BC Zhang, L Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Cunha, A Dahmes, B Hong, TM Kovalskyi, D Richman, JD Beck, TW Eisner, AM Flacco, CJ Heusch, CA Kroseberg, J Lockman, WS Schalk, T Schumm, BA Seiden, A Williams, DC Wilson, MG Winstrom, LO Chen, E Cheng, CH Dvoretskii, A Fang, F Hitlin, DG Narsky, I Piatenko, T Porter, FC Mancinelli, G Meadows, BT Mishra, K Sokoloff, MD Blanc, F Bloom, PC Chen, S Ford, WT Hirschauer, JF Kreisel, A Nagel, M Nauenberg, U Olivas, A Smith, JG Ulmer, KA Wagner, SR Zhang, J Chen, A Eckhart, EA Soffer, A Toki, WH Wilson, RJ Winklmeier, F Zeng, Q Altenburg, DD Feltresi, E Hauke, A Jasper, H Merkel, J Petzold, A Spaan, B Wacker, K Brandt, T Klose, V Lacker, HM Mader, WF Nogowski, R Schubert, J Schubert, KR Schwierz, R Sundermann, JE Volk, A Bernard, D Bonneaud, GR Latour, E Thiebaux, C Verderi, M Clark, PJ Gradl, W Muheim, F Playfer, S Robertson, AI Xie, Y Andreotti, M Bettoni, D Bozzi, C Calabrese, R Cecchi, A Cibinetto, G Franchini, P Luppi, E Negrini, M Petrella, A Piemontese, L Prencipe, E Santoro, V Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Finocchiaro, G Pacetti, S Patteri, P Peruzzi, IM Piccolo, M Rama, M Zallo, A Buzzo, A Contri, R Lo Vetere, M Macri, MM Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Chaisanguanthum, KS Morii, M Wu, J Dubitzky, RS Marks, J Schenk, S Uwer, U Bard, DJ Dauncey, PD Flack, RL Nash, JA Nikolich, MB Vazquez, WP Behera, PK Chai, X Charles, MJ Mallik, U Meyer, NT Ziegler, V Cochran, J Crawley, HB Dong, L Eyges, V Meyer, WT Prell, S Rosenberg, EI Rubin, AE Gritsan, AV Lae, CK Denig, AG Fritsch, M Schott, G Arnaud, N Bequilleux, J Davier, M Grosdidier, G Hocker, A Lepeltier, V Le Diberder, F Lutz, AM Pruvot, S Rodier, S Roudeau, P Schune, MH Serrano, J Sordini, V Stocchi, A Wang, WF Wormser, G Lange, DJ Wright, DM Chavez, CA Forster, IJ Fry, JR Gabathuler, E Gamet, R Hutchcroft, DE Payne, DJ Schofield, KC Touramanis, C Bevan, AJ George, KA Di Lodovico, F Menges, W Sacco, R Cowan, G Flaecher, HU Hopkins, DA Jackson, PS McMahon, TR Salvatore, F Wren, AC Brown, DN Davis, CL Allison, J Barlow, NR Barlow, RJ Chia, YM Edgar, CL Lafferty, GD West, TJ Yi, JI Anderson, J Chen, C Jawahery, A Roberts, DA Simi, G Tuggle, JM Blaylock, G Dallapiccola, C Hertzbach, SS Li, X Moore, TB Salvati, E Saremi, S Cowan, R Fisher, PH Sciolla, G Sekula, SJ Spitznagel, M Taylor, F Yamamoto, RK Kim, H Mclachlin, SE Patel, PM Robertson, SH Lazzaro, A Lombardo, V Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote, D Simard, M Taras, P Viaud, FB Nicholson, H De Nardo, G Fabozzi, F Lista, L Monorchio, D Sciacca, C Baak, MA Raven, G Snoek, HL Jessop, CP LoSecco, JM Benelli, G Corwin, LA Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Morris, JP Rahimi, AM Regensburger, JJ 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Escalier, M Gaidot, A Ganzhur, SF de Monchenault, GH Kozanecki, W Legendre, M Vasseur, G Yeche, C Zito, M Chen, XR Liu, H Park, W Purohit, MV Wilson, JR Allen, MT Aston, D Bartoldus, R Bechtle, P Berger, N Claus, R Coleman, JP Convery, MR Dingfelder, JC Dorfan, J Dubois-Felsmann, GP Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Graham, MT Grenier, P Halyo, V Hast, C Hryn'ova, T Innes, WR Kelsey, MH Kim, P Leith, DWGS Li, S Luitz, S Luth, V Lynch, HL MacFarlane, DB Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Pulliam, T Ratcliff, BN Roodman, A Salnikov, AA Schindler, RH Schwiening, J Snyder, A Stelzer, J Su, D Sullivan, MK Suzuki, K Swain, SK Thompson, JM Va'vra, J van Bakel, N Wagner, AP Weaver, M Wisniewski, WJ Wittgen, M Wright, DH Yarritu, AK Yi, K Young, CC Burchat, PR Edwards, AJ Majewski, SA Petersen, BA Wilden, L Ahmed, S Alam, MS Bula, R Ernst, JA Jain, V Pan, B Saeed, MA Wappler, FR Zain, SB Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R 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Schubert, J. Schubert, K. R. Schwierz, R. Sundermann, J. E. Volk, A. Bernard, D. Bonneaud, G. R. Latour, E. Thiebaux, Ch. Verderi, M. Clark, P. J. Gradl, W. Muheim, F. Playfer, S. Robertson, A. I. Xie, Y. Andreotti, M. Bettoni, D. Bozzi, C. Calabrese, R. Cecchi, A. Cibinetto, G. Franchini, P. Luppi, E. Negrini, M. Petrella, A. Piemontese, L. Prencipe, E. Santoro, V. Anulli, F. Baldini-Ferroli, R. Calcaterra, A. de Sangro, R. Finocchiaro, G. Pacetti, S. Patteri, P. Peruzzi, I. M. Piccolo, M. Rama, M. Zallo, A. Buzzo, A. Contri, R. Lo Vetere, M. Macri, M. M. Monge, M. R. Passaggio, S. Patrignani, C. Robutti, E. Santroni, A. Tosi, S. Chaisanguanthum, K. S. Morii, M. Wu, J. Dubitzky, R. S. Marks, J. Schenk, S. Uwer, U. Bard, D. J. Dauncey, P. D. Flack, R. L. Nash, J. A. Nikolich, M. B. Vazquez, W. Panduro Behera, P. K. Chai, X. Charles, M. J. Mallik, U. Meyer, N. T. Ziegler, V. Cochran, J. Crawley, H. B. Dong, L. Eyges, V. Meyer, W. T. Prell, S. Rosenberg, E. I. Rubin, A. E. Gritsan, A. V. Lae, C. K. Denig, A. G. Fritsch, M. Schott, G. Arnaud, N. Bequilleux, J. Davier, M. Grosdidier, G. Hoecker, A. Lepeltier, V. Le Diberder, F. Lutz, A. M. Pruvot, S. Rodier, S. Roudeau, P. Schune, M. H. Serrano, J. Sordini, V. Stocchi, A. Wang, W. F. Wormser, G. Lange, D. J. Wright, D. M. Chavez, C. A. Forster, I. J. Fry, J. R. Gabathuler, E. Gamet, R. Hutchcroft, D. E. Payne, D. J. Schofield, K. C. Touramanis, C. Bevan, A. J. George, K. A. Di Lodovico, F. Menges, W. Sacco, R. Cowan, G. Flaecher, H. U. Hopkins, D. A. Jackson, P. S. McMahon, T. R. Salvatore, F. Wren, A. C. Brown, D. N. Davis, C. L. Allison, J. Barlow, N. R. Barlow, R. J. Chia, Y. M. Edgar, C. L. Lafferty, G. D. West, T. J. Yi, J. I. Anderson, J. Chen, C. Jawahery, A. Roberts, D. A. Simi, G. Tuggle, J. M. Blaylock, G. Dallapiccola, C. Hertzbach, S. S. Li, X. Moore, T. B. Salvati, E. Saremi, S. Cowan, R. Fisher, P. H. Sciolla, G. Sekula, S. J. Spitznagel, M. Taylor, F. Yamamoto, R. K. Kim, H. Mclachlin, S. E. Patel, P. M. Robertson, S. H. Lazzaro, A. Lombardo, V. Palombo, F. Bauer, J. M. Cremaldi, L. Eschenburg, V. Godang, R. Kroeger, R. Sanders, D. A. Summers, D. J. Zhao, H. W. Brunet, S. Cote, D. Simard, M. Taras, P. Viaud, F. B. Nicholson, H. De Nardo, G. Fabozzi, F. Lista, L. Monorchio, D. Sciacca, C. Baak, M. A. Raven, G. Snoek, H. L. Jessop, C. P. LoSecco, J. M. Benelli, G. Corwin, L. A. Gan, K. K. Honscheid, K. Hufnagel, D. Kagan, H. Kass, R. Morris, J. P. Rahimi, A. M. Regensburger, J. J. Ter-Antonyan, R. Wong, Q. K. Blount, N. L. Brau, J. Frey, R. Igonkina, O. Kolb, J. A. Lu, M. Rahmat, R. Sinev, N. B. Strom, D. Strube, J. Torrence, E. Gagliardi, N. Gaz, A. Margoni, M. Morandin, M. Pompili, A. Posocco, M. Rotondo, M. Simonetto, F. Stroili, R. Voci, C. Ben-Haim, E. Briand, H. Chauveau, J. David, P. Del Buono, L. de la Vaissiere, Ch. Hamon, O. Hartfiel, B. L. Leruste, Ph. Malcles, J. Ocariz, J. Perez, A. Gladney, L. Biasini, M. Covarelli, R. Manoni, E. Angelini, C. Batignani, G. Bettarini, S. Calderini, G. Carpinelli, M. Cenci, R. Forti, F. Giorgi, M. A. Lusiani, A. Marchiori, G. Mazur, M. A. Morganti, M. Neri, N. Paoloni, E. Rizzo, G. Walsh, J. J. Haire, M. Biesiada, J. Elmer, P. Lau, Y. P. Lu, C. Olsen, J. Smith, A. J. S. Telnov, A. V. Baracchini, E. Bellini, F. Cavoto, G. D'Orazio, A. del Re, D. Di Marco, E. Faccini, R. Ferrarotto, F. Ferroni, F. Gaspero, M. Jackson, P. D. Gioi, L. Li Mazzoni, M. A. Morganti, S. Piredda, G. Polci, F. Renga, F. Voena, C. Ebert, M. Schroeder, H. Waldi, R. Adye, T. Castelli, G. Franek, B. Olaiya, E. O. Ricciardi, S. Roethel, W. Wilson, F. F. Aleksan, R. Emery, S. Escalier, M. Gaidot, A. Ganzhur, S. F. de Monchenault, G. Hamel Kozanecki, W. Legendre, M. Vasseur, G. Yeche, Ch. Zito, M. Chen, X. R. Liu, H. Park, W. Purohit, M. V. Wilson, J. R. Allen, M. T. Aston, D. Bartoldus, R. Bechtle, P. Berger, N. Claus, R. Coleman, J. P. Convery, M. R. Dingfelder, J. C. Dorfan, J. Dubois-Felsmann, G. P. Dujmic, D. Dunwoodie, W. Field, R. C. Glanzman, T. Gowdy, S. J. Graham, M. T. Grenier, P. Halyo, V. Hast, C. Hryn'ova, T. Innes, W. R. Kelsey, M. H. Kim, P. Leith, D. W. G. S. Li, S. Luitz, S. Luth, V. Lynch, H. L. MacFarlane, D. B. Marsiske, H. Messner, R. Muller, D. R. O'Grady, C. P. Ozcan, V. E. Perazzo, A. Perl, M. Pulliam, T. Ratcliff, B. N. Roodman, A. Salnikov, A. A. Schindler, R. H. Schwiening, J. Snyder, A. Stelzer, J. Su, D. Sullivan, M. K. Suzuki, K. Swain, S. K. Thompson, J. M. Va'vra, J. van Bakel, N. Wagner, A. P. Weaver, M. Wisniewski, W. J. Wittgen, M. Wright, D. H. Yarritu, A. K. Yi, K. Young, C. C. Burchat, P. R. Edwards, A. J. Majewski, S. A. Petersen, B. A. Wilden, L. Ahmed, S. Alam, M. S. Bula, R. Ernst, J. A. Jain, V. Pan, B. Saeed, M. A. Wappler, F. R. Zain, S. B. Bugg, W. Krishnamurthy, M. Spanier, S. M. Eckmann, R. Ritchie, J. L. Ruland, A. M. Schilling, C. J. Schwitters, R. F. Izen, J. M. Lou, X. C. Ye, S. Bianchi, F. Gallo, F. Gamba, D. Pelliccioni, M. Bomben, M. Bosisio, L. Cartaro, C. Cossutti, F. Della Ricca, G. Lanceri, L. Vitale, L. Azzolini, V. Lopez-March, N. Martinez-Vidal, F. Milanes, D. A. Oyanguren, A. Albert, J. Banerjee, Sw. Bhuyan, B. Hamano, K. Kowalewski, R. Nugent, I. M. Roney, J. M. Sobie, R. J. Back, J. J. Harrison, P. F. Latham, T. E. Mohanty, G. B. Pappagallo, M. Band, H. R. Chen, X. Dasu, S. Flood, K. T. Hollar, J. J. Kutter, P. E. Pan, Y. Pierini, M. Prepost, R. Wu, S. L. Yu, Z. Neal, H. TI Search for the rare decay B ->pi l(+)l(-) SO PHYSICAL REVIEW LETTERS LA English DT Article ID QUARK-MODEL AB We have performed a search for the flavor-changing neutral-current decays B-->pi l(+)l(-), where l(+)l(-) is either e(+)e(-) or mu(+)mu(-), using a sample of 230x10(6) Upsilon(4S)-->B(B)over-bar decays collected with the BABAR detector. We observe no evidence of a signal and measure the upper limit on the isospin-averaged branching fraction to be B(B-->pi l(+)l(-)) < 9.1 x 10(-8) at 90% confidence level. We also search for the lepton-flavor-violating decays B-->pi e(+/-)mu(-/+) and measure an upper limit on the isospin-averaged branching fraction of B(B-->pi e(+/-)mu(-/+)) < 9.2 x 10(-8) at 90% confidence level. C1 Univ Savoie, Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany. Tech Univ Dresden, Inst Kern & Teilchenphy, D-01062 Dresden, Germany. Ecole Polytech, Lab Leprince Ringuet, CNRS, IN2P3, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany. Univ London Imperial Coll Sci Technol & Med, London SW7 2AZ, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ, Ames, IA 50011 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76021 Karlsruhe, Germany. Univ Paris 11, Accelerateur Lineaire Lab, IN2P3, CNRS, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 7ZE, Merseyside, England. Univ London, London E1 4NS, England. Univ London, Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, Lab Phys Nucl Hautes Energies, IN2P3, CNRS, F-75252 Paris, France. Univ Denis Diderot Paris 7, F-75252 Paris, France. Univ Penn, Philadelphia, PA 19104 USA. Univ Perugia, Dipartimento Fis, I-06100 Perugia, Italy. Ist Nazl Fis Nucl, I-06100 Perugia, Italy. Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Univ Valencia, CSIC, IFIC, E-46071 Valencia, Spain. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. RP Aubert, B (reprint author), Univ Savoie, Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Rotondo, Marcello/I-6043-2012; Forti, Francesco/H-3035-2011; Martinez Vidal, F*/L-7563-2014; Morandin, Mauro/A-3308-2016; Monge, Maria Roberta/G-9127-2012; Della Ricca, Giuseppe/B-6826-2013; Bellini, Fabio/D-1055-2009; Calabrese, Roberto/G-4405-2015; Saeed, Mohammad Alam/J-7455-2012; Calcaterra, Alessandro/P-5260-2015; Mir, Lluisa-Maria/G-7212-2015; Oyanguren, Arantza/K-6454-2014; Patrignani, Claudia/C-5223-2009; de Sangro, Riccardo/J-2901-2012; Cavallo, Nicola/F-8913-2012; Negrini, Matteo/C-8906-2014; Peters, Klaus/C-2728-2008; Lista, Luca/C-5719-2008; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Kolomensky, Yury/I-3510-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Pappagallo, Marco/R-3305-2016; Di Lodovico, Francesca/L-9109-2016; Lo Vetere, Maurizio/J-5049-2012; Rizzo, Giuliana/A-8516-2015; dong, liaoyuan/A-5093-2015; Luppi, Eleonora/A-4902-2015; Frey, Raymond/E-2830-2016; OI Rotondo, Marcello/0000-0001-5704-6163; Forti, Francesco/0000-0001-6535-7965; Martinez Vidal, F*/0000-0001-6841-6035; Morandin, Mauro/0000-0003-4708-4240; Monge, Maria Roberta/0000-0003-1633-3195; Della Ricca, Giuseppe/0000-0003-2831-6982; Bellini, Fabio/0000-0002-2936-660X; Calabrese, Roberto/0000-0002-1354-5400; Saeed, Mohammad Alam/0000-0002-3529-9255; Calcaterra, Alessandro/0000-0003-2670-4826; Mir, Lluisa-Maria/0000-0002-4276-715X; Oyanguren, Arantza/0000-0002-8240-7300; Patrignani, Claudia/0000-0002-5882-1747; de Sangro, Riccardo/0000-0002-3808-5455; Negrini, Matteo/0000-0003-0101-6963; Peters, Klaus/0000-0001-7133-0662; Neri, Nicola/0000-0002-6106-3756; Kolomensky, Yury/0000-0001-8496-9975; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Pappagallo, Marco/0000-0001-7601-5602; Di Lodovico, Francesca/0000-0003-3952-2175; Lo Vetere, Maurizio/0000-0002-6520-4480; Strube, Jan/0000-0001-7470-9301; Raven, Gerhard/0000-0002-2897-5323; Pacetti, Simone/0000-0002-6385-3508; Sciacca, Crisostomo/0000-0002-8412-4072; Ebert, Marcus/0000-0002-3014-1512; Carpinelli, Massimo/0000-0002-8205-930X; Lafferty, George/0000-0003-0658-4919; Faccini, Riccardo/0000-0003-2613-5141; Bettarini, Stefano/0000-0001-7742-2998; Paoloni, Eugenio/0000-0001-5969-8712; Rizzo, Giuliana/0000-0003-1788-2866; Covarelli, Roberto/0000-0003-1216-5235; Hamel de Monchenault, Gautier/0000-0002-3872-3592; dong, liaoyuan/0000-0002-4773-5050; Cibinetto, Gianluigi/0000-0002-3491-6231; Lanceri, Livio/0000-0001-8220-3095; Luppi, Eleonora/0000-0002-1072-5633; Frey, Raymond/0000-0003-0341-2636; Egede, Ulrik/0000-0001-5493-0762 NR 19 TC 55 Z9 55 U1 0 U2 8 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 AUG 3 PY 2007 VL 99 IS 5 AR 051801 DI 10.1103/PhysRevLett.99.051801 PG 7 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500008 ER PT J AU Bulaevskii, LN Koshelev, AE AF Bulaevskii, L. N. Koshelev, A. E. TI Radiation due to Josephson oscillations in layered superconductors SO PHYSICAL REVIEW LETTERS LA English DT Article ID JUNCTION ARRAYS AB We derive the power of direct radiation into free space induced by Josephson oscillations in intrinsic Josephson junctions of layered superconductors. We consider the superradiation regime for a crystal cut in the form of a thin slice parallel to the c axis. We find that the radiation correction to the current-voltage characteristic in this regime depends only on crystal shape. We show that at a large number of junctions oscillations are synchronized providing high radiation power and efficiency in the terahertz frequency range. We discuss the crystal parameters and bias current optimal for radiation power and crystal cooling. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Bulaevskii, LN (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Koshelev, Alexei/K-3971-2013 OI Koshelev, Alexei/0000-0002-1167-5906 NR 16 TC 87 Z9 87 U1 0 U2 12 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 3 PY 2007 VL 99 IS 5 AR 057002 DI 10.1103/PhysRevLett.99.057002 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500048 PM 17930780 ER PT J AU Harrison, N Sebastian, SE Mielke, CH Paris, A Gordon, MJ Swenson, CA Rickel, DG Pacheco, MD Ruminer, PF Schillig, JB Sims, JR Lacerda, AH Suzuki, MT Harima, H Ebihara, T AF Harrison, N. Sebastian, S. E. Mielke, C. H. Paris, A. Gordon, M. J. Swenson, C. A. Rickel, D. G. Pacheco, M. D. Ruminer, P. F. Schillig, J. B. Sims, J. R. Lacerda, A. H. Suzuki, M.-T. Harima, H. Ebihara, T. TI Fermi surface of CeIn3 above the neel critical field SO PHYSICAL REVIEW LETTERS LA English DT Article ID MAGNETIC-FIELDS; HEAVY AB We report measurements of the de Haas-van Alphen effect in CeIn3 in magnetic fields extending to approximate to 90 T, well above the Neel critical field of mu H-0(c) approximate to 61 T. The unreconstructed Fermi surface a sheet is observed in the high magnetic field polarized paramagnetic limit, but with its effective mass and Fermi surface volume strongly reduced in size compared to that observed in the low magnetic field paramagnetic regime under pressure. The spheroidal topology of this sheet provides an ideal realization of the transformation from a "large Fermi surface" accommodating f electrons to a "small Fermi surface" when the f-electron moments become polarized. C1 Los Alamos Natl Lab, Natl High Magnet Field Lab, Los Alamos, NM 87545 USA. Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England. Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan. Univ Shizuoka, Dept Phys, Shizuoka 4228529, Japan. RP Harrison, N (reprint author), Los Alamos Natl Lab, Natl High Magnet Field Lab, MS E536, Los Alamos, NM 87545 USA. RI Suzuki, Michi-To/G-6298-2013; OI Harrison, Neil/0000-0001-5456-7756 NR 24 TC 25 Z9 25 U1 0 U2 14 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 AUG 3 PY 2007 VL 99 IS 5 AR 056401 DI 10.1103/PhysRevLett.99.056401 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500040 PM 17930772 ER PT J AU Iodice, M Cusanno, F Acha, A Ambrozewicz, P Aniol, KA Baturin, P Bertin, PY Benaoum, H Blomqvist, KI Boeglin, WU Breuer, H Brindza, P Bydzovsky, P Camsonne, A Chang, CC Chen, JP Choi, S Chudakov, EA Cisbani, E Colilli, S Coman, L Craver, BJ De Cataldo, G de Jager, CW De Leo, R Deur, AP Ferdi, C Feuerbach, RJ Folts, E Fratoni, R Frullani, S Garibaldi, F Gayou, O Giulani, F Gomez, J Gricia, M Hansen, JO Hayes, D Higinbotham, DW Holmstrom, TK Hyde, CE Ibrahim, HF Jiang, X Kaufman, LJ Kino, K Kross, B Lagamba, L LeRose, JJ Lindgren, RA Lucentini, M Margaziotis, DJ Markowitz, P Marrone, S Meziani, ZE McCormick, K Michaels, RW Millener, DJ Miyoshi, T Moffit, B Monaghan, PA Moteabbed, M Camacho, CMO Nanda, S Nappi, E Nelyubin, VV Norum, BE Okasyasu, Y Paschke, KD Perdrisat, CF Piasetzky, E Punjabi, VA Qiang, Y Raue, B Reimer, PE Reinhold, J Reitz, B Roche, RE Rodriguez, VM Saha, A Santavenere, F Sarty, AJ Segal, J Shahinyan, A Singh, J Sirca, S Snyder, R Solvignon, PH Sotona, M Subedi, R Sulkosky, VA Suzuki, T Ueno, H Ulmer, PE Urciuoli, GM Veneroni, P Voutier, E Wojtsekhowski, BB Ye, Y Zheng, X Zhou, S Zorn, C AF Iodice, M. Cusanno, F. Acha, A. Ambrozewicz, P. Aniol, K. A. Baturin, P. Bertin, P. Y. Benaoum, H. Blomqvist, K. I. Boeglin, W. U. Breuer, H. Brindza, P. Bydzovsky, P. Camsonne, A. Chang, C. C. Chen, J.-P. Choi, Seonho Chudakov, E. A. Cisbani, E. Colilli, S. Coman, L. Craver, B. J. De Cataldo, G. de Jager, C. W. De Leo, R. Deur, A. P. Ferdi, C. Feuerbach, R. J. Folts, E. Fratoni, R. Frullani, S. Garibaldi, F. Gayou, O. Giulani, F. Gomez, J. Gricia, M. Hansen, J. O. Hayes, D. Higinbotham, D. W. Holmstrom, T. K. Hyde, C. E. Ibrahim, H. F. Jiang, X. Kaufman, L. J. Kino, K. Kross, B. Lagamba, L. LeRose, J. J. Lindgren, R. A. Lucentini, M. Margaziotis, D. J. Markowitz, P. Marrone, S. Meziani, Z. E. McCormick, K. Michaels, R. W. Millener, D. J. Miyoshi, T. Moffit, B. Monaghan, P. A. Moteabbed, M. Camacho, C. Munoz Nanda, S. Nappi, E. Nelyubin, V. V. Norum, B. E. Okasyasu, Y. Paschke, K. D. Perdrisat, C. F. Piasetzky, E. Punjabi, V. A. Qiang, Y. Raue, B. Reimer, P. E. Reinhold, J. Reitz, B. Roche, R. E. Rodriguez, V. M. Saha, A. Santavenere, F. Sarty, A. J. Segal, J. Shahinyan, A. Singh, J. Sirca, S. Snyder, R. Solvignon, P. H. Sotona, M. Subedi, R. Sulkosky, V. A. Suzuki, T. Ueno, H. Ulmer, P. E. Urciuoli, G. M. Veneroni, P. Voutier, E. Wojtsekhowski, B. B. Ye, Y. Zheng, X. Zhou, S. Zorn, C. TI High resolution spectroscopy of B-12(Lambda) by electroproduction SO PHYSICAL REVIEW LETTERS LA English DT Article ID HALL-A; JEFFERSON-LAB; LAMBDA-HYPERNUCLEI; RICH DETECTOR; KAON PHYSICS; STRANGENESS AB An experiment measuring electroproduction of hypernuclei has been performed in hall A at Jefferson Lab on a C-12 target. In order to increase counting rates and provide unambiguous kaon identification two superconducting septum magnets and a ring imaging Cherenkov detector were added to the hall A standard equipment. An unprecedented energy resolution of less than 700 keV FWHM has been achieved. Thus, the observed B-12(Lambda) spectrum shows for the first time identifiable strength in the core-excited region between the ground-state s-wave Lambda peak and the 11 MeV p-wave Lambda peak. C1 Ist Nazl Fis Nucl, Sezione Roma Tre, I-00146 Rome, Italy. Ist Nazl Fis Nucl, Sez Romal, Grp Coll Sanita, I-00161 Rome, Italy. Florida Int Univ, Miami, FL 33199 USA. Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. Rutgers State Univ, Piscataway, NJ 08855 USA. Univ Clermont Ferrand, IN2P3, F-63177 Clermont Ferrand, France. Syracuse Univ, Syracuse, NY 13244 USA. Johannes Gutenberg Univ Mainz, Mainz, Germany. Univ Maryland, College Pk, MD 20742 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic. Temple Univ, Philadelphia, PA 19122 USA. Ist Super Sanita, I-00161 Rome, Italy. Univ Virginia, Charlottesville, VA 22904 USA. Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy. Univ Bari, I-70126 Bari, Italy. MIT, Cambridge, MA 02139 USA. Old Dominion Univ, Norfolk, VA 23508 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Univ Massachusetts, Amherst, MA 01003 USA. Osaka Univ, Res Ctr Nucl Phys, Ibaraki, Osaka 5670047, Japan. Brookhaven Natl Lab, Upton, NY 11973 USA. Tohoku Univ, Sendai, Miyagi 9808578, Japan. CEA Saclay, DAPNIA SPhN, F-91191 Gif Sur Yvette, France. Tel Aviv Univ, Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Norfolk State Univ, Norfolk, VA 23504 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Florida State Univ, Tallahassee, FL 32306 USA. Univ Houston, Houston, TX 77204 USA. St Marys Univ, Halifax, NS B3H 3C3, Canada. Yerevan Phys Inst, Yerevan 375036, Armenia. Univ Ljubljana, Dept Phys, Ljubljana 61000, Slovenia. Kent State Univ, Kent, OH 44242 USA. Yamagata Univ, Yamagata 9908560, Japan. Univ Grenoble 1, LPSC, CNRS IN2P3, INPG, F-38026 Grenoble, France. Univ Sci & Technol China, Hefei, Anhui, Peoples R China. China Inst Atom Energy, Beijing, Peoples R China. RP Iodice, M (reprint author), Ist Nazl Fis Nucl, Sezione Roma Tre, I-00146 Rome, Italy. RI kino, koichi/D-6173-2012; Reimer, Paul/E-2223-2013; Singh, Jaideep/H-2346-2013; Sarty, Adam/G-2948-2014; Higinbotham, Douglas/J-9394-2014; Cisbani, Evaristo/C-9249-2011 OI Singh, Jaideep/0000-0002-4810-4824; Higinbotham, Douglas/0000-0003-2758-6526; Cisbani, Evaristo/0000-0002-6774-8473 NR 20 TC 49 Z9 49 U1 0 U2 3 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 AUG 3 PY 2007 VL 99 IS 5 AR 052501 DI 10.1103/PhysRevLett.99.052501 PG 5 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500015 PM 17930747 ER PT J AU Li, CK Seguin, FH Frenje, JA Rygg, JR Petrasso, RD Town, RPJ Landen, OL Knauer, JP Smalyuk, VA AF Li, C. K. Seguin, F. H. Frenje, J. A. Rygg, J. R. Petrasso, R. D. Town, R. P. J. Landen, O. L. Knauer, J. P. Smalyuk, V. A. TI Observation of megagauss-field topology changes due to magnetic reconnection in laser-produced plasmas SO PHYSICAL REVIEW LETTERS LA English DT Article ID MATTER AB The spatial structure and temporal evolution of megagauss magnetic fields generated by interactions of up to 4 laser beams with matter were studied with an innovative, time-gated proton radiography method that produces images of unprecedented clarity because it uses an isotropic, truly monoenergetic backlighter (14.7-MeV protons from (DHe)-He-3 nuclear fusion reactions). Quantitative field maps reveal precisely and directly, for the first time, changes in the magnetic topology due to reconnection in a high-energy-density plasma (n(e)similar to 10(20)-10(22) cm(-3), T-e similar to 1 keV). C1 MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA. RP Li, CK (reprint author), MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA. NR 24 TC 82 Z9 82 U1 4 U2 32 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 AUG 3 PY 2007 VL 99 IS 5 AR 055001 DI 10.1103/PhysRevLett.99.055001 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500030 ER PT J AU Sengupta, P Haas, S AF Sengupta, Pinaki Haas, Stephan TI Quantum glass phases in the disordered Bose-Hubbard model SO PHYSICAL REVIEW LETTERS LA English DT Article ID SUPERFLUID-INSULATOR TRANSITION; LOCALIZATION; SYSTEMS AB The phase diagram of the Bose-Hubbard model in the presence of off-diagonal disorder is determined using quantum Monte Carlo simulations. A sequence of quantum glass phases intervene at the interface between the Mott insulating and the superfluid phases of the clean system. In addition to the standard Bose glass phase, the coexistence of gapless and gapped regions close to the Mott insulating phase leads to a novel Mott glass regime which is incompressible yet gapless. Numerical evidence for the properties of these phases is given in terms of global (compressibility, superfluid stiffness) and local (compressibility, momentum distribution) observables. C1 Los Alamos Natl Lab, T CNLS, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, NHMFL, Los Alamos, NM 87545 USA. Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA. RP Sengupta, P (reprint author), Los Alamos Natl Lab, T CNLS, POB 1663, Los Alamos, NM 87545 USA. RI Haas, Stephan/C-4103-2008; Sengupta, Pinaki/B-6999-2011 NR 31 TC 20 Z9 20 U1 0 U2 9 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 AUG 3 PY 2007 VL 99 IS 5 AR 050403 DI 10.1103/PhysRevLett.99.050403 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500003 PM 17930735 ER PT J AU Tang, XD Rehm, KE Ahmad, I Brune, CR Champagne, A Greene, JP Hecht, AA Henderson, D Janssens, RVF Jiang, CL Jisonna, L Kahl, D Moore, EF Notani, M Pardo, RC Patel, N Paul, M Savard, G Schiffer, JP Segel, RE Sinha, S Shumard, B Wuosmaa, AH AF Tang, X. D. Rehm, K. E. Ahmad, I. Brune, C. R. Champagne, A. Greene, J. P. Hecht, A. A. Henderson, D. Janssens, R. V. F. Jiang, C. L. Jisonna, L. Kahl, D. Moore, E. F. Notani, M. Pardo, R. C. Patel, N. Paul, M. Savard, G. Schiffer, J. P. Segel, R. E. Sinha, S. Shumard, B. Wuosmaa, A. H. TI New determination of the astrophysical S factor S-E1 of the C-12(alpha,gamma)O-16 reaction SO PHYSICAL REVIEW LETTERS LA English DT Article ID TWIN IONIZATION-CHAMBER; ALPHA-PARTICLE EMISSION; CROSS-SECTION; NUCLEAR-REACTIONS; STELLAR ENERGIES; N-16; NUCLEOSYNTHESIS; SPECTRUM AB A new measurement of the beta-delayed alpha decay of N-16 has been performed using a set of high efficiency ionization chambers. Sources were made by implantation of a N-16 beam, yielding very clean alpha spectra down to energies as low as 400 keV. Our data are in good agreement with earlier results. For the S factor S-E1, we obtain a value of 74 +/- 21 keV b. In spite of improvements in the measurement, the error in S-E1 remains relatively large because of the correlations among the fit parameters and the uncertainties inherent to the extrapolation. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Ohio Univ, Athens, OH 45701 USA. Univ N Carolina, Chapel Hill, NC 27599 USA. Univ Maryland, College Pk, MD 20742 USA. Northwestern Univ, Evanston, IL 60208 USA. Michigan State Univ, E Lansing, MI 48824 USA. Colorado Sch Mines, Golden, CO 80401 USA. Hebrew Univ Jerusalem, Jerusalem, Israel. Western Michigan Univ, Kalamazoo, MI 49008 USA. RP Tang, XD (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RI Tang, Xiaodong /F-4891-2016 NR 24 TC 19 Z9 20 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 3 PY 2007 VL 99 IS 5 AR 052502 DI 10.1103/PhysRevLett.99.052502 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500016 PM 17930748 ER PT J AU Taylor, OJ Carrington, A Schlueter, JA AF Taylor, O. J. Carrington, A. Schlueter, J. A. TI Specific-heat measurements of the gap structure of the organic superconductors kappa-(ET)(2)Cu[N(CN)(2)]Br and kappa-(ET)(2)Cu(NCS)(2) SO PHYSICAL REVIEW LETTERS LA English DT Article ID PENETRATION DEPTH; TEMPERATURE; STATE; RELAXATION AB We present high resolution heat capacity measurements of the organic superconductors kappa-(ET)(2)Cu[N(CN)(2)]Br and kappa-(ET)(2)Cu(NCS)(2) in fields up to 14 T. We use the high field data to determine the normal state specific heat and hence extract the behavior of the electronic specific heat C-el in the superconducting state in zero and finite fields. We find that in both materials for T/T-c less than or similar to 0.3, C-el(H = 0) similar to T-2 indicating d-wave superconductivity. The data are well described by a strong coupling d-wave model from our base temperature (T/T-c similar to 0.1) right up to T-c. Our data help to resolve the controversy regarding the order parameter symmetry in these materials. C1 Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Taylor, OJ (reprint author), Univ Bristol, HH Wills Phys Lab, Tyndall Ave, Bristol BS8 1TL, Avon, England. NR 19 TC 40 Z9 40 U1 0 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 AUG 3 PY 2007 VL 99 IS 5 AR 057001 DI 10.1103/PhysRevLett.99.057001 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500047 PM 17930779 ER PT J AU Yildirim, Y Alvarez, G Moreo, A Dagotto, E AF Yildirim, Yucel Alvarez, Gonzalo Moreo, Adriana Dagotto, Elbio TI Large-scale monte carlo study of a realistic lattice model for Ga1-xMnxAs SO PHYSICAL REVIEW LETTERS LA English DT Article ID ELECTRONIC-STRUCTURE; SEMICONDUCTORS; FERROMAGNETISM; EPILAYERS AB Mn-doped GaAs is studied with a real-space Hamiltonian on an fcc lattice that reproduces the valence bands of undoped GaAs. Large-scale Monte Carlo (MC) simulations on a Cray XT3, using up to a thousand nodes, were needed. Spin-orbit interaction and the random distribution of the Mn ions are considered. The hopping amplitudes are functions of the GaAs Luttinger parameters. At the realistic coupling J similar to 1.2 eV the MC Curie temperature and magnetization curves agree with experiments for x=8.5% annealed samples. Mn-doped GaSb and GaP are also briefly discussed. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37966 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA. RP Yildirim, Y (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37966 USA. NR 39 TC 14 Z9 14 U1 0 U2 3 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 AUG 3 PY 2007 VL 99 IS 5 AR 057207 DI 10.1103/PhyRevLett.99.057207 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500056 PM 17930788 ER PT J AU Yoon, M Lee, HN Hong, W Christen, HM Zhang, ZY Suo, ZG AF Yoon, Mina Lee, Ho Nyung Hong, Wei Christen, Hans M. Zhang, Zhenyu Suo, Zhigang TI Dynamics of step bunching in heteroepitaxial growth on vicinal substrates SO PHYSICAL REVIEW LETTERS LA English DT Article ID MOLECULAR-BEAM EPITAXY; CRYSTAL-SURFACES; NANOSTRUCTURES; INSTABILITY; DIFFUSION AB When a heteroepitaxial film is grown on a vicinal substrate, the terrace steps at the growth front may bunch together to relieve strain, resulting in a rough surface. On the other hand, proper manipulation of the growth kinetics may suppress the inherent bunching instability, thus preserving step-flow growth. Here we show that the step dynamics in the early stages of growth can already determine whether the bunching instability is truly suppressed, prior to bunching actually taking place in the unstable regime. We determine the critical film thickness above which steps will bunch and exploit its scaling properties and usefulness for extracting intrinsic energy parameters. Experimental studies of SrRuO3 films grown on vicinal SrTiO3 substrates clearly establish the existence of the critical film thickness in step bunching. C1 Oak Ridge Natl Lab, Mat Sci & Technol Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA. RP Yoon, M (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Lab, Oak Ridge, TN 37831 USA. RI Hong, Wei/B-1537-2008; Suo, Zhigang/B-1067-2008; Christen, Hans/H-6551-2013; Lee, Ho Nyung/K-2820-2012; Yoon, Mina/A-1965-2016 OI Hong, Wei/0000-0001-6598-3456; Suo, Zhigang/0000-0002-4068-4844; Christen, Hans/0000-0001-8187-7469; Lee, Ho Nyung/0000-0002-2180-3975; Yoon, Mina/0000-0002-1317-3301 NR 20 TC 18 Z9 18 U1 4 U2 33 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 AUG 3 PY 2007 VL 99 IS 5 AR 055503 DI 10.1103/PhysRevLett.99.055503 PG 4 WC Physics, Multidisciplinary SC Physics GA 197ZW UT WOS:000248597500036 PM 17930768 ER PT J AU Goodrich, CC Pulkkinen, TI Lyon, JG Merkin, VG AF Goodrich, C. C. Pulkkinen, T. I. Lyon, J. G. Merkin, V. G. TI Magnetospheric convection during intermediate driving: Sawtooth events and steady convection intervals as seen in Lyon-Fedder-Mobarry global MHD simulations SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MAGNETIC RECONNECTION; PLASMA SHEET; SUBSTORM; ONSET; FIELD; SPACECRAFT; FLOWS AB We have used global MHD simulations to investigate the magnetospheric response to steady solar wind for two events. The event of 18 April 2002 is characterized by periodic particle injections and magnetic field dipolarizations, or sawtooth activity, at geosynchronous orbit, while 3-4 February 1998 is a period of steady magnetospheric convection (SMC). In our simulations we find for both events that a general system of convection develops, characterized in the magnetotail by large-scale sunward flows driven by reconnection in region of 30-45 RE downstream. These flows in general divert around the inner magnetosphere to the dawn and dusk flanks and then converge toward the dayside magnetopause. In the sawtooth event we find reconnection is intermittent and patchy, resulting in flow bursts which on average produce the general convection pattern indicated, but a fraction of them penetrate into the inner magnetosphere and are associated with observed plasma injections and field dipolarizations. In the SMC event the convection system is formed by quasi-steady reconnection in the midtail, which drives steady earthward flows. These flows divert to the flanks, leaving the inner magnetosphere undisturbed. We find the difference in the magnitude of IMF B-Z is unlikely to account for difference in activity in the two events, as a simulation of the SMC event with increased vertical bar B-Z vertical bar produced qualitatively the same steady convection. Solar wind density variations are shown to control the average mass transport but have no correlation with the flow channels responsible for the inner magnetospheric activity in the simulations. C1 Boston Univ, Ctr Integrated Space Weather Modeling, Boston, MA 02215 USA. Los Alamos Natl Lab, Los Alamos, NM USA. Finnish Meteorol Inst, FI-00101 Helsinki, Finland. Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA. RP Goodrich, CC (reprint author), Boston Univ, Ctr Integrated Space Weather Modeling, 725 Commonwealth Ave, Boston, MA 02215 USA. EM ccg@bu.edu RI Pulkkinen, Tuija/D-8403-2012; Merkin, Viacheslav/D-5982-2016 OI Pulkkinen, Tuija/0000-0002-6317-381X; Merkin, Viacheslav/0000-0003-4344-5424 NR 38 TC 21 Z9 21 U1 0 U2 5 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0148-0227 J9 J GEOPHYS RES-SPACE JI J. Geophys. Res-Space Phys. PD AUG 2 PY 2007 VL 112 IS A8 AR A08201 DI 10.1029/2006JA012155 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 198DC UT WOS:000248606200001 ER PT J AU Peng, HS AF Peng, Huisheng TI Unusual assembly of small organic building molecules in common solvent SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID LANGMUIR-BLODGETT-FILMS; BLOCK-COPOLYMERS; HOLLOW SPHERES; POLYDIACETYLENE/SILICA NANOCOMPOSITES; SUPRAMOLECULAR ASSEMBLIES; AMPHIPHILIC DIACETYLENE; VESICLES; MORPHOLOGIES; POLYMERIZATION; MICROCAPSULES AB During the process of self-association, reaching a thermodynamic equilibrium state in dilute solution is usually very fast, taking at most seconds for small organic (such as surfactants) solutions and hours for polymer solutions. It is very rare that days are necessary for soluble small organic molecules to reach thermodynamic stability in dilute solutions. This work reports such an unusually slow association of two polymerizable organic molecules, HOOC(CH2)(3)CCCC(CH2)(3)COOH and (EtO)(3)Si(CH2)(3)NH2, in their common solvent. The self-organization process of above complexes spanned several minutes to several days, depending on their concentrations. The morphologies of resultant aggregates, ranging from vesicles to solid spheres and to hollow spheres, were also tunable by varying the molar ratios of two precursors. Enriched functional COOH/NH2 groups on the aggregate surface can attach various antibodies, which endow the nanaoparticles with great potential applications as targeted drug-delivery vehicles. In addition, as-synthesized hybrid aggregates could be further stabilized by either addition reaction of diacetylenic acid or hydrolysis and condensation reactions of 3-aminopropyltriethoxysilane. In particular, the derived polydiacetylenic aggregates demonstrate a thermochromatic property and may be applied as sensing materials. Those novel phenomena, along with the simplicity in the preparation of aggregates, make the system promising in addressing related theoretical problems and practical applications. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Peng, HS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM hpeng@lanl.gov RI Peng, Huisheng/G-8867-2011 NR 36 TC 12 Z9 12 U1 1 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 2 PY 2007 VL 111 IS 30 BP 8885 EP 8890 DI 10.1021/jp0722962 PG 6 WC Chemistry, Physical SC Chemistry GA 194AG UT WOS:000248315700031 PM 17602522 ER PT J AU Fuentes-Cabrera, M Zhao, X Kent, PRC Sumpter, BG AF Fuentes-Cabrera, Miguel Zhao, Xiongce Kent, P. R. C. Sumpter, Bobby G. TI Electronic structure of xDNA SO JOURNAL OF PHYSICAL CHEMISTRY B LA English DT Article ID SIZE-EXPANDED DNA; PAIRED GENETIC HELIX; METAL-IONS; MOLECULAR-DYNAMICS; BUILDING-BLOCKS; ARTIFICIAL DNA; AB-INITIO; BASES; YDNA; NUCLEOBASES AB xDNA is an artificial duplex made of natural and benzo-homologated bases. The latter can be seen as a fusion between benzene and a natural base. We have used two different ab initio techniques, one based on B3LYP and a Gaussian expansion of the wave functions, and the other on GGA and plane-waves, to investigate the electronic properties of an xDNA duplex and a natural one with an analogous sequence. The calculations were performed in dry conditions, i.e., H atoms were used to neutralize the charge. It is found that the HOMO-LUMO gap of xDNA is about 0.5 eV smaller than that of B-DNA, independent of the technique used. The pi-pi* gap of xDNA is 1.3 or 1.0 eV smaller than that of B-DNA, depending on whether one uses B3LYP/6-31G or GGA/plane-waves, respectively. An analysis of how saturation changes the electronic properties of the nucleotide pairs that make up these duplexes suggests that different saturation schemes significantly affect the HOMO-LUMO gap value of xDNA and B-DNA. The same is not true for the pi-pi* gap. That xDNA has a smaller pi-pi* gap than B-DNA suggests that xDNA could be a plausible candidate for molecular-wire applications. C1 Oak Ridge Natl Lab, Ctr Nanophase Mat Sci & Comp Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Math, Oak Ridge, TN 37831 USA. RP Fuentes-Cabrera, M (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci & Comp Sci, POB 2008, Oak Ridge, TN 37831 USA. EM fuentescabma@ornl.gov RI Kent, Paul/A-6756-2008; Sumpter, Bobby/C-9459-2013; Fuentes-Cabrera, Miguel/Q-2437-2015 OI Kent, Paul/0000-0001-5539-4017; Sumpter, Bobby/0000-0001-6341-0355; Fuentes-Cabrera, Miguel/0000-0001-7912-7079 NR 42 TC 24 Z9 24 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1520-6106 J9 J PHYS CHEM B JI J. Phys. Chem. B PD AUG 2 PY 2007 VL 111 IS 30 BP 9057 EP 9061 DI 10.1021/jp0729056 PG 5 WC Chemistry, Physical SC Chemistry GA 194AG UT WOS:000248315700051 PM 17650925 ER PT J AU Scholes, GD Tretiak, S McDonald, TJ Metzger, WK Engtrakul, C Rumbles, G Heben, MJ AF Scholes, Gregory D. Tretiak, Sergei McDonald, Timothy J. Metzger, Wyatt K. Engtrakul, Chaiwat Rumbles, Garry Heben, Michael J. TI Low-lying exciton states determine the photophysics of semiconducting single wall carbon nanotubes SO JOURNAL OF PHYSICAL CHEMISTRY C LA English DT Article ID ELECTRONIC EXCITATIONS; FLUORESCENCE DECAY; RADIATIVE LIFETIME; FRENKEL EXCITONS; TEMPERATURE; DYNAMICS; SPECTROSCOPY; ABSORPTION; QUANTUM; RELAXATION AB A combined experimental and theoretical study of the photophysical properties and excited-state dynamics of semiconducting single-wall carbon nanotubes(SWNTs) is reported. Steady-state and time-resolved fluorescence data as a function of temperature are explained on the basis of a manifold of four low-lying singlet exciton states with kinetically controlled interconversion. Relaxation among these levels is slow and therefore Kasha's rule is not obeyed. Quantum chemical calculations based on time-dependent density functional theory complement the experimental findings. The temperature-dependence of the radiative and nonradiative rate constants are examined. C1 Natl Renewabl energy Lab, Golden, CO 80401 USA. Univ Turin, Dept Chem, Inst Opt Sci, Toronto, ON M5S 3H6, Canada. Univ Turin, Ctr Quantum Informat & Quantum Control, Toronto, ON M5S 3H6, Canada. Los Alamos Natl Lab, CINT, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, CNLS, Theoret Div, Los Alamos, NM 87545 USA. Columbia Univ, Dept Appl Phys, New York, NY 10027 USA. RP Scholes, GD (reprint author), Natl Renewabl energy Lab, MS 3216,1617 Cole Blvd, Golden, CO 80401 USA. RI Engtrakul, Chaiwat/H-5634-2011; Tretiak, Sergei/B-5556-2009; OI Tretiak, Sergei/0000-0001-5547-3647; Rumbles, Garry/0000-0003-0776-1462 NR 87 TC 32 Z9 32 U1 1 U2 23 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1932-7447 J9 J PHYS CHEM C JI J. Phys. Chem. C PD AUG 2 PY 2007 VL 111 IS 30 BP 11139 EP 11149 DI 10.1021/jp068541j PG 11 WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 194AJ UT WOS:000248316000001 ER PT J AU Kerisit, S Rosso, KM Dupuis, M Valiev, M AF Kerisit, Sebastien Rosso, Kevin M. Dupuis, Michel Valiev, Marat TI Molecular computational investigation of electron-transfer kinetics across cytochrome-iron oxide interfaces SO JOURNAL OF PHYSICAL CHEMISTRY C LA English DT Article ID SHEWANELLA-PUTREFACIENS MR-1; C-TYPE CYTOCHROMES; OUTER-MEMBRANE CYTOCHROMES; GAUSSIAN-BASIS SETS; GEOBACTER-SULFURREDUCENS; HEMATITE ALPHA-FE2O3; COMPUTER-SIMULATION; CHARGE-TRANSPORT; ONEIDENSIS MR-1; FRIGIDIMARINA NCIMB400 AB The interface between electron-transfer proteins such as cytochromes and solid-phase mineral oxides is central to the activity of dissimilatory-metal reducing bacteria. A combination of potential-based molecular dynamics simulations and ab initio electronic structure calculations are used in the framework of Marcus's electron-transfer theory to compute elementary electron-transfer rates from a well-defined cytochrome model, namely, the small tetraheme cytochrome ( STC) from Shewanella oneidensis, to surfaces of the iron oxide mineral hematite (alpha-Fe2O3). Room-temperature molecular dynamics simulations show that an isolated STC molecule favors surface attachment via direct contact of hemes I and IV at the poles of the elongated axis, with electron-transfer distances as small as 9 angstrom. The cytochrome remains attached to the mineral surface in the presence of water and shows limited surface diffusion at the interface. Ab initio electronic coupling matrix element ( V-AB) calculations of configurations excised from the molecular dynamics simulations reveal VAB values ranging from 1 to 20 cm(-1), consistent with nonadiabaticity. Using these results, together with experimental data on the redox potential of hematite and hemes in relevant cytochromes and calculations of the reorganization energy from cluster models, we estimate the rate of electron transfer across this model interface to range from 1 to 1000 s(-1) for the most exothermic driving force considered in this work and from 0.01 to 20 s-1 for the most endothermic. This fairly large range of electron-transfer rates highlights the sensitivity of the rate upon the electronic coupling matrix element, which is in turn dependent on the fluctuations of the heme configuration at the interface. We characterize this dependence using an idealized bisimidazole heme to compute from first principles the VAB variation due to porphyrin ring orientation, electron-transfer distance, and mineral surface termination. The electronic matrix element and consequently the rate of electron transfer are found to be sensitive to all parameters considered. This work indicates that biomolecularly similar solvent-exposed bishistidine hemes in outer-membrane cytochromes such as MtrC or OmcA are likely to have an affinity for the oxide surface in water governing the approach and interfacial conformation and, if allowed sufficient conformational freedom, will achieve distances and configurations required for direct interfacial electron transfer. C1 Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99354 USA. Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA. RP Kerisit, S (reprint author), Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99354 USA. EM sebastien.kerisit@pnl.gov NR 75 TC 42 Z9 43 U1 3 U2 41 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1932-7447 J9 J PHYS CHEM C JI J. Phys. Chem. C PD AUG 2 PY 2007 VL 111 IS 30 BP 11363 EP 11375 DI 10.1021/jp072060y PG 13 WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 194AJ UT WOS:000248316000030 ER PT J AU Wander, MCF Rosso, KM Schoonen, MAA AF Wander, Matthew C. F. Rosso, Kevin M. Schoonen, Martin A. A. TI Structure and charge hopping dynamics in green rust SO JOURNAL OF PHYSICAL CHEMISTRY C LA English DT Article ID ELECTRON-TRANSFER REACTIONS; MICROBIALLY INFLUENCED CORROSION; SEMICONDUCTING MINERAL SURFACES; HYDROTALCITE-LIKE COMPOUNDS; MOLECULAR-ORBITAL METHODS; ZERO-VALENT IRON; H-PH DIAGRAMS; MOSSBAUER-SPECTROSCOPY; AB-INITIO; BASIS-SET AB Green rust is a family of mixed-valent iron phases formed by a number of abiotic and biotic processes under alkaline suboxic conditions. Because of its high Fe(2+) content, green rust is a potentially important phase for pollution remediation by serving as a powerful electron donor for reductive transformation. However, mechanisms of oxidation of this material are poorly understood. An essential component of the green rust structure is a mixed-valent brucite-like Fe(OH)(2) sheet comprised of a two-dimensional network of edgesharing iron octahedra. Liquid nitrogen temperature Mossbauer spectra show that any Fe(2+)-Fe(3+) valence interchange reaction must be slower than approximately 10(7) s(-1). Using Fe(OH)(2) as structural analogue for reduced green rust, we performed Hartree-Fock calculations on periodic slab models and cluster representations to determine the structure and hopping mobility of Fe(3+) hole polarons in this material, providing a first principles assessment of the Fe(2+)-Fe(3+) valence interchange reaction rate. The calculations show that, among three possible symmetry unique iron-to-iron hops within a sheet, a hop to next-nearest neighbors at an intermediate distance of 5.6 angstrom is the fastest. The predicted rate is on the order of 10(10) s(-1) (at 300 K) and 10(3) s(-1) (at 70 K), consistent the Mossbauer-based constraint. All other possibilities, including hopping across interlayer spaces, are predicted to be slower than 10(7) s(-1). Collectively, the findings suggest the possibility of hole self-diffusion along sheets as a mechanism for regeneration of lattice Fe(2+) sites, consistent with previous experimental observations of edge-inward progressive oxidation of green rust. C1 SUNY Stony Brook, CEMS, Dept Geosci, Stony Brook, NY 11794 USA. Pacific NW Natl Lab, EMSL, Richland, WA 99352 USA. Pacific NW Natl Lab, Chem & Mat Sci Div, Richland, WA 99352 USA. RP Wander, MCF (reprint author), SUNY Stony Brook, CEMS, Dept Geosci, Stony Brook, NY 11794 USA. RI Schoonen, martin/E-7703-2011 OI Schoonen, martin/0000-0002-7133-1160 NR 97 TC 15 Z9 18 U1 3 U2 29 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1932-7447 J9 J PHYS CHEM C JI J. Phys. Chem. C PD AUG 2 PY 2007 VL 111 IS 30 BP 11414 EP 11423 DI 10.1021/jp072762n PG 10 WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Chemistry; Science & Technology - Other Topics; Materials Science GA 194AJ UT WOS:000248316000036 ER PT J AU Borovinskaya, MA Shoji, S Holton, JM Fredric, K Cate, JHD AF Borovinskaya, Maria A. Shoji, Shinichiro Holton, James M. Fredric, Kurt Cate, Jamie H. D. TI A steric block in translation caused by the antibiotic spectinomycin SO ACS CHEMICAL BIOLOGY LA English DT Article ID MESSENGER-RNA TRANSLOCATION; 16S RIBOSOMAL-RNA; ESCHERICHIA-COLI; PROTEIN-SYNTHESIS; AMINOGLYCOSIDE ANTIBIOTICS; CONFORMATIONAL-CHANGES; ANGSTROM RESOLUTION; SUBUNIT; ACTINOSPECTACIN; RESISTANCE AB The widely used antibiotic spectinomycin inhibits bacterial protein synthesis by blocking translocation of messenger RNA and transfer RNAs on the ribosome. Here, we show that in crystals of the Escherichia coli 70S ribosome spectinomycin binding traps a distinct swiveling state of the head domain of the small ribosomal subunit. Spectinomycin also alters the rate and completeness of reverse translocation in vitro. These structural and biochemical data indicate that in solution spectinomycin sterically blocks swiveling of the head domain of the small ribosomal subunit and thereby disrupts the translocation cycle. C1 Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Ohio State Univ, Dept Microbiol, Columbus, OH 43210 USA. Ohio State Univ, Ohio State Biochem Program, Columbus, OH 43210 USA. Univ Calif San Francisco, Dept Biochem & Biophys, San Francisco, CA 94158 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Mol & Cell Biol, Berkeley, CA 94720 USA. RP Cate, JHD (reprint author), Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA. EM jcate@lbl.gov FU NCI NIH HHS [CA92584, P01 CA092584]; NIGMS NIH HHS [GM072528, GM65050, R01 GM065050, R01 GM072528, R01 GM072528-04] NR 47 TC 62 Z9 64 U1 1 U2 7 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 1554-8929 EI 1554-8937 J9 ACS CHEM BIOL JI ACS Chem. Biol. PD AUG PY 2007 VL 2 IS 8 BP 545 EP 552 DI 10.1021/cb700100n PG 8 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 204AI UT WOS:000249014800019 PM 17696316 ER PT J AU Stevens, KJ Ingham, B Toney, MF Brown, SA Partridge, J Ayesh, A Natali, F AF Stevens, K. J. Ingham, B. Toney, M. F. Brown, S. A. Partridge, J. Ayesh, A. Natali, F. TI Structure of oxidized bismuth nanoclusters SO ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE LA English DT Article ID X-RAY-DIFFRACTION; PROFILE ANALYSIS; ELECTROLYTES; DISLOCATIONS; SESQUIOXIDE; PARTICLES; COPPER; FAULTS; SIZE; BI AB Synchrotron X-ray diffraction has determined that ss-Bi2O3 is the dominant oxide phase covering hexagonal bismuth nanoclusters produced in an inert gas aggregation source. Simulated Debye-Scherrer patterns have indicated that the oxide is 20 +/- 5 angstrom thick on average, at the surface of 320 +/- 40 angstrom diameter clusters. A Williamson-Hall analysis of the peak broadening was used to measure the non-uniform strain in clusters. The oxidized clusters were in -0.11 +/- 0.06% uniform compressive strain compared with other clusters without oxides detectable by X-ray diffraction which only have a small tensile uniform strain. High-resolution transmission electron microscopy (HRTEM) and multislice image simulations indicated a ss-Bi2O3 thickness of 20-50 angstrom. The HRTEM micrographs show the relative orientation between the oxide and the cluster core. C1 MPT Solut Ltd, Lower Hutt, New Zealand. MacDiamid Inst Adv Mat & Nanotechnol, Wellington, New Zealand. Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Ind Res Ltd, Lower Hutt, New Zealand. Univ Canterbury, Dept Phys & Astron, Nanostruct Engn Sci & Technol Grp, Christchurch, New Zealand. RP Stevens, KJ (reprint author), MPT Solut Ltd, PO Box 38-096, Lower Hutt, New Zealand. EM k.stevens@mptsolutions.com RI Brown, Simon/C-1014-2008; natali, franck/C-3335-2011 OI Brown, Simon/0000-0002-6041-4331; NR 28 TC 12 Z9 12 U1 2 U2 6 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0108-7681 J9 ACTA CRYSTALLOGR B JI Acta Crystallogr. Sect. B-Struct. Sci. PD AUG PY 2007 VL 63 BP 569 EP 576 DI 10.1107/S0108768107024652 PN 4 PG 8 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 190UU UT WOS:000248086900008 PM 17641426 ER PT J AU Thomas, LH Welberry, TR Goossens, DJ Heerdegen, AP Gutmann, MJ Teat, SJ Lee, PL Wilson, CC Cole, JM AF Thomas, Lynne H. Welberry, T. Richard Goossens, Darren J. Heerdegen, Aidan P. Gutmann, Matthias J. Teat, Simon J. Lee, Peter L. Wilson, Chick C. Cole, Jacqueline M. TI Disorder in pentachloronitrobenzene, C6CI5NO2: a diffuse scattering study SO ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE LA English DT Article ID X-RAY SCATTERING; CRYSTAL-STRUCTURE; SUBSTITUTED BENZENES; GLASS-TRANSITION; MOTION; PHASE AB Monte Carlo computer simulation has been used to interpret and model observed single- crystal diffuse X-ray scattering data for pentachloronitrobenzene, C6Cl5NO2. Each site in the crystal contains a molecule in one of six different basic orientations with equal probability. However, no short- range order amongst these different orientations has been detected. The strong, detailed and very distinctive diffraction patterns can be accounted for almost entirely on the assumption of random occupancy of each molecular site, but with very large local relaxation displacements that tend to increase the neighbouring distances for contacts involving NO2 center dot center dot center dot NO2 and NO2 center dot center dot center dot Cl with a corresponding reduction for those involving Cl center dot center dot center dot Cl. The results show that the mean NO2 center dot center dot center dot NO2 distance is increased by similar to 0.6 angstrom, compared with that given by the average structure determination. C1 Univ Cambridge, Univ Chem Lab, Cambridge CB2 1EW, England. Australian Natl Univ, Res Sch Chem, Canberra, ACT 0200, Australia. Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England. Synchrotron Radiat Dept, Daresbury Lab, Warrington WA4 4AD, Cheshire, England. Nat Lab, Adv Photon Source, Argonne, IL USA. Univ Glasgow, W Chem Res Sch, Dept Chem, Glasgow G12 8QQ, Lanark, Scotland. Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England. RP Cole, JM (reprint author), Univ Cambridge, Univ Chem Lab, Lensfield Rd, Cambridge CB2 1EW, England. EM jmc61@hermes.cam.ac.uk RI Cole, Jacqueline/C-5991-2008; Thomas, Lynne/C-4612-2011; Wilson, Chick/F-1355-2011; Welberry, Thomas/H-7847-2014; OI Thomas, Lynne/0000-0003-3325-9644; Welberry, Thomas/0000-0002-6906-9191; Goossens, Darren/0000-0003-0776-2692 NR 23 TC 19 Z9 19 U1 1 U2 13 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0108-7681 J9 ACTA CRYSTALLOGR B JI Acta Crystallogr. Sect. B-Struct. Sci. PD AUG PY 2007 VL 63 BP 663 EP 673 DI 10.1107/S0108768107024305 PN 4 PG 11 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 190UU UT WOS:000248086900019 PM 17641437 ER PT J AU Yang, HX Hubler, DK Lavina, B Downs, RT Costin, G AF Yang, Hexiong Hubler, David K. Lavina, Barbara Downs, Robert T. Costin, Gelu TI Tyrrellite, Cu(Co0.68Ni0.32)(2)Se-4, isostructural with spinel SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID SINGLE-CRYSTAL STRUCTURE; MAGNETIC-PROPERTIES; ELECTRICAL-PROPERTIES; NEUTRON-DIFFRACTION; CUCR2SE4; COPPER; VALENCE; SUBSTITUTION; SYSTEM; ORDER AB Tyrrellite, a naturally occurring Co-Ni-Cu selenide, has been studied by single- crystal X- ray diffraction. It possesses the normal spinel- type structure, with Cu occupying the tetrahedral site and ( Co+ Ni) the octahedral site. The average Cu Se distance of 2.3688 ( 2) angstrom is close to that of 2.3703 ( 8) angstrom in CuCr2Se4, whereas the average ( Co+ Ni) - Se distance of 2.3840 ( 1) angstrom appears to be slightly shorter than most octahedral Co - Se or Ni - Se distances ( similar to 2.40 - 2.50 angstrom) in other selenides. The refined structure provides a basis for a redefinition of the ideal chemical formula of tyrrellite, which should be Cu( Co, Ni) Se-2(4), rather than the previously suggested ( Cu, Co, Ni) Se-3(4). C1 Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA. Argonne Natl Lab, GSECARS, Argonne, IL 60439 USA. RP Yang, HX (reprint author), Univ Arizona, Dept Geosci, 1040 E 4th St, Tucson, AZ 85721 USA. EM hyang@u.arizona.edu RI Lavina, Barbara/A-1015-2010 OI Lavina, Barbara/0000-0002-8556-7916 NR 32 TC 1 Z9 1 U1 0 U2 4 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD AUG PY 2007 VL 63 BP I73 EP I74 DI 10.1107/S010827010703048X PN 8 PG 2 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA 196NA UT WOS:000248488100006 PM 17675677 ER PT J AU Yapici, GG Beyerlein, IJ Karaman, I Tome, CN AF Yapici, G. G. Beyerlein, I. J. Karaman, I. Tome, C. N. TI Tension-compression asymmetry in severely deformed pure copper SO ACTA MATERIALIA LA English DT Article DE equal channel angular extrusion; equal channel angular pressing; flow anisotropy; tension-compression asymmetry; strain path change ID CHANNEL ANGULAR EXTRUSION; ULTRAFINE-GRAINED COPPER; FLOW-STRESS ANISOTROPY; MECHANICAL-PROPERTIES; PLASTIC-DEFORMATION; FCC POLYCRYSTALS; PATH CHANGES; STRAIN PATH; ALUMINUM; TITANIUM AB In this work, we investigate the tension-compression asymmetry in the flow response of pure copper, severely deformed by a single pass of equal channel angular extrusion (ECAE), and tested afterwards in tension and compression along three orthogonal directions. The tension and compression responses differ in flow stress, hardening rate and transient behavior. The asymmetry in tension and compression responses depends on the direction of straining. Predictions from a microstructurally based hardening law implemented in a viscoplastic self-consistent polycrystal model demonstrate that the tension-compression asymmetry and its anisotropy arise not only from crystallographic texture but also from the directional substructure induced by the severe pre-straining. Slip activity differs in each grain and in each axial test, depending on its crystallographic orientation, orientation relationship with the previously generated substructure and pre-strain history. Asymmetry occurs because tension and compression represent two different types of strain path changes. Consequently, macroscopic deformation is a reflection of the type of strain path change represented by the post-ECAE axial test. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Yapici, GG (reprint author), Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA. EM ggyapici@tamu.edu; ikaraman@ta-mu.edu RI Karaman, Ibrahim/E-7450-2010; Tome, Carlos/D-5058-2013; Beyerlein, Irene/A-4676-2011 OI Karaman, Ibrahim/0000-0001-6461-4958; NR 33 TC 36 Z9 36 U1 0 U2 22 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD AUG PY 2007 VL 55 IS 14 BP 4603 EP 4613 DI 10.1016/j.actamat.2007.03.031 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 201HX UT WOS:000248823200002 ER PT J AU Jiang, C AF Jiang, Chao TI Site preference of transition-metal elements in B2NiAl: A comprehensive study SO ACTA MATERIALIA LA English DT Article DE site preference; transition metals; nickel aluminides; point defects; first-principles electron theory ID THERMAL POINT-DEFECTS; AUGMENTED-WAVE METHOD; ALLOYING ADDITIONS; NIAL ALLOYS; 1ST-PRINCIPLES; FE; TEMPERATURE; ALUMINIDES; CR; OCCUPANCIES AB First-principles supercell calculations based on density functional theory were performed to study the T = 0 K site preference of 3d (Ti-Cu), 4d (Zr-Ag) and 5d (Hf-Au) transition-metal elements in B2 NiAl. By adopting a statistical-mechanical Wagner-Schottky model within the canonical ensemble, the effects of finite temperature on site preference were further considered. The calculations showed that, at all alloy compositions and temperatures, Co, Tc, Ru, Rh, Re, Os, Ir and Pt have a consistent preference for the Ni sublattice, while Ti, Zr, Nb, Hf and Ta have a consistent preference for the Al sublattice. In contrast, the site preference of V, Cr, Mn, Fe, Cu, Mo, Pd, Ag, W and Au was found to depend on both composition and temperature. The present calculated results compare favorably with existing theoretical and experimental studies in the literature. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. C1 Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Jiang, C (reprint author), Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. EM chao@lanl.gov RI Jiang, Chao/A-2546-2011; Jiang, Chao/D-1957-2017 OI Jiang, Chao/0000-0003-0610-6327 NR 42 TC 40 Z9 41 U1 1 U2 19 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1359-6454 EI 1873-2453 J9 ACTA MATER JI Acta Mater. PD AUG PY 2007 VL 55 IS 14 BP 4799 EP 4806 DI 10.1016/j.actamat.2007.04.049 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA 201HX UT WOS:000248823200022 ER PT J AU Zhu, YH Peng, SC Emi, A Zhenshun, S Monalisa Kemp, RA AF Zhu, Yinghuai Peng, Ship Chee Emi, A. Zhenshun, Su Monalisa Kemp, Richard A. TI Supported ultra small palladium on magnetic nanoparticles used as catalysts for suzuki cross-coupling and heck reactions SO ADVANCED SYNTHESIS & CATALYSIS LA English DT Article DE C-C coupling; Heck reaction; magnetic nanoparticle support; palladium; phosphorylation ID TRANSITION-METAL NANOPARTICLES; HYDROFORMYLATION CATALYSTS; COLLOIDS; CLUSTERS; PD; NANOSCALE; SIZE; HYDROGENATION; NANOCLUSTERS; PRECURSORS AB Application of transition metal nanoparticles as catalysts for organic transformations has been attracting wide interest as nanoparticle-based catalytic systems might exhibit superior catalytic activities than the corresponding bulk materials. However, the main difficulty is that such small particles are almost impossible to separate by conventional means, which can lead to the blocking of filters and valves by the nanoparticle catalyst. We have conveniently prepared ultra small palladium(0) particles (less than 1 nm) on magnetic nanoparticle supports, in which immobilized auxiliaries are used as stabilizing ligands. These catalysts were active for Suzuki cross-coupling and Heck reactions giving isolated yields of 83% and 56%, respectively. In addition, the catalyst can be easily separated using a magnet and reused several times with sustained activity. C1 ICES, Jurong Isl 627833, Singapore. Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore. Singapore Polytech, Singapore 139651, Singapore. Univ New Mexico, Dept Chem, Albuquerque, NM 87131 USA. Sandia Natl Labs, Adv Mat Lab, Albuquerque, NM 87106 USA. RP Zhu, YH (reprint author), ICES, 1 Pesek Rd, Jurong Isl 627833, Singapore. EM zhu_yinghuai@ices.a-star.edu NR 53 TC 57 Z9 59 U1 0 U2 34 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY SN 1615-4150 J9 ADV SYNTH CATAL JI Adv. Synth. Catal. PD AUG PY 2007 VL 349 IS 11-12 BP 1917 EP 1922 DI 10.1002/adsc.200700021 PG 6 WC Chemistry, Applied; Chemistry, Organic SC Chemistry GA 208IN UT WOS:000249313100014 ER PT J AU Dickinson, JE James, SC Mehl, S Hill, MC Leake, SA Zyvoloski, GA Faunt, CC Eddebbarh, AA AF Dickinson, Jesse E. James, Scott C. Mehl, Steffen Hill, Mary C. Leake, S. A. Zyvoloski, George A. Faunt, Claudia C. Eddebbarh, Al-Aziz TI A new ghost-node method for linking different models and initial investigations of heterogeneity and nonmatching grids SO ADVANCES IN WATER RESOURCES LA English DT Article DE local grid refinement; groundwater models; finite-difference; finite-element; interpolation; MODFLOW; FEHM ID WATER FLOW MODELS; SHARED NODES; REFINEMENT; ERRORS AB A flexible, robust method for linking parent (regional-scale) and child (local-scale) grids of locally refined models that use different numerical methods is developed based on a new, iterative ghost-node method. Tests are presented for two-dimensional and three-dimensional pumped systems that are homogeneous or that have simple heterogeneity. The parent and child grids are simulated using the block-centered finite-difference MODFLOW and control-volume finite-element FEHM models, respectively. The models are solved iteratively through head-dependent (child model) and specified-flow (parent model) boundary conditions. Boundary conditions for models with nonmatching grids or zones of different hydraulic conductivity are derived and tested against heads and flows from analytical or globally-refined models. Results indicate that for homogeneous two- and three-dimensional models with matched grids (integer number of child cells per parent cell), the new method is nearly as accurate as the coupling of two MODFLOW models using the shared-node method and, surprisingly, errors are slightly lower for nonmatching grids (noninteger number of child cells per parent cell). For heterogeneous three-dimensional systems, this paper compares two methods for each of the two sets of boundary conditions: external heads at head-dependent boundary conditions for the child model are calculated using bilinear interpolation or a Darcy-weighted interpolation; specified-flow boundary conditions for the parent model are calculated using model-grid or hydrogeologic-unit hydraulic conductivities. Results suggest that significantly more accurate heads and flows are produced when both Darcy-weighted interpolation and hydrogeologic-unit hydraulic conductivities are used, while the other methods produce larger errors at the boundary between the regional and local models. The tests suggest that, if posed correctly, the ghost-node method performs well. Additional testing is needed for highly heterogeneous systems. (c) 2007 Elsevier Ltd. All rights reserved. C1 US Geol Survey, Tucson, AZ USA. Sandia Natl Labs, Livermore, CA USA. US Geol Survey, Boulder, CO USA. Los Alamos Natl Lab, Los Alamos, NM USA. US Geol Survey, San Diego, CA USA. RP Dickinson, JE (reprint author), US Geol Survey, 520 N Pk Suite 221, Tucson, AZ USA. EM jdickins@usgs.gov RI Dickinson, Jesse/I-7177-2016; OI Dickinson, Jesse/0000-0002-0048-0839; James, Scott/0000-0001-7955-0491 NR 25 TC 8 Z9 8 U1 1 U2 12 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0309-1708 J9 ADV WATER RESOUR JI Adv. Water Resour. PD AUG PY 2007 VL 30 IS 8 BP 1722 EP 1736 DI 10.1016/j.advwatres.2007.01.004 PG 15 WC Water Resources SC Water Resources GA 185LY UT WOS:000247713700002 ER PT J AU Beresh, SJ Heineck, JT Walker, SM Schairer, ET Yaste, DM AF Beresh, Steven J. Heineck, James T. Walker, Stephen M. Schairer, Edward T. Yaste, David M. TI Planar velocimetry of jet/fin interaction on a full-scale flight vehicle configuration SO AIAA JOURNAL LA English DT Article ID TRANSVERSE SUPERSONIC JET; PARTICLE IMAGE VELOCIMETRY; COMPRESSIBLE CROSS-FLOW AB Stereoscopic particle image velocimetry has been implemented in a production-scale transonic wind tunnel for studying jet/fin interaction created by exhaust plumes from spin rockets on a full-scale model of a finned body of revolution. Data acquired just upstream of the leading edge of the fin root clearly display the counter-rotating vortex pair that dominates the interaction far field and the remnant of the horseshoe vortex near the vehicle surface. The counter-rotating vortex pair is distinctly asymmetric due to originating from a scarfed nozzle and displays some rotation with respect to the model surface. Velocity fields measured over a range of flowfield conditions and model orientations show that the vortex of negative sign is always closer to the fins than its positive counterpart and does not greatly change location as flowfield parameters are altered. The circulation of this vortex correlates with a reduction in the simultaneously measured vehicle roll torque. Further correlations are hindered by untreatable bias errors in the velocimetry. Instead, a model of the vortex structure derived from the velocimetry data reveals that the angle of attack induced upon the fins by the counter-rotating vortex pair correlates with the roll torque loss. Similar correlations suggest that in level flight this effect is dominant, but at angle of attack the horseshoe vortex on the windward side has an additional influence. C1 Sandia Natl Labs, Engn Sci Ctr, Albuquerque, NM 87185 USA. NASA, Ames Res Ctr, Expt Aerophys Branch, Moffett Field, CA 94035 USA. RP Beresh, SJ (reprint author), Sandia Natl Labs, Engn Sci Ctr, POB 5800,Mailstop 0834, Albuquerque, NM 87185 USA. NR 21 TC 3 Z9 4 U1 0 U2 1 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA SN 0001-1452 J9 AIAA J JI AIAA J. PD AUG PY 2007 VL 45 IS 8 BP 1827 EP 1840 DI 10.2514/1.26485 PG 14 WC Engineering, Aerospace SC Engineering GA 195BE UT WOS:000248386700005 ER PT J AU Liu, Y Taylor, LA Thompson, JR Schnare, DW Park, JS AF Liu, Yang Taylor, Lawrence A. Thompson, James R. Schnare, Darren W. Park, Jae-Sung TI Unique properties of lunar impact glass: Nanophase metallic Fe synthesis SO AMERICAN MINERALOGIST LA English DT Article DE nanophase Fe; metallic Fe; lunar dust; ferromagnet; microwave coupling; magnetization ID LASER IRRADIATION; SPACE; NANOPARTICLES; SIMULATION; SAMPLES; SOIL; SOL AB Lunar regolith contains important materials that can be used for in-situ resource utilization (ISRU) on the Moon, thereby providing for substantial economic savings for development of a manned base. However, virtually all activities on the Moon will be affected by the deleterious effects of the adhering, abrasive, and pervasive nature of lunar dust (< 20 mu m portion of regolith, which constitutes similar to 20 wt% of the soil). In addition, the major impact-produced glass in the lunar soil, especially agglutinitic glass (60-80 vol% of the dust), contains unique nanometer-sized metallic Fe (np-Fe-0), which may pose severe pulmonary problems for humans. The presence of the np-Fe-0 imparts considerable magnetic susceptibility to the fine portion of the lunar soil, and dust mitigation techniques can be designed using these magnetic properties. The limited availability of Apollo lunar soils for ISRU research has made it necessary to produce materials that simulate this unique np-Fe-0 property, for testing different dust mitigation methods using electromagnetic fields, and for toxicity studies of human respiratory and pulmonary systems, and for microwave treatment of lunar soil to produce paved roads, etc. A method for synthesizing np-Fe-0 in an amorphous silica matrix is presented here. This type of specific simulant can be used as an additive to other existing lunar soil simulants. C1 Univ Tennessee, Dept Earth & Planetary Sci, Planetary Geosci Inst, Knoxville, TN 37996 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mech Aerospace & Biomed Engn, Knoxville, TN 37996 USA. RP Liu, Y (reprint author), Univ Tennessee, Dept Earth & Planetary Sci, Planetary Geosci Inst, Knoxville, TN 37996 USA. EM yangl@utk.edu RI Liu, Yang/A-4708-2012 NR 31 TC 14 Z9 18 U1 3 U2 13 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0003-004X J9 AM MINERAL JI Am. Miner. PD AUG-SEP PY 2007 VL 92 IS 8-9 BP 1420 EP 1427 DI 10.2138/am.2007.2333 PG 8 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA 200XB UT WOS:000248795000018 ER PT J AU Miller, SA Burnett, DS Asimow, PD Phinney, DL Hutcheon, ID AF Miller, Sarah A. Burnett, Donald S. Asimow, Paul D. Phinney, Douglas L. Hutcheon, Ian D. TI Experimental study of radium partitioning between anorthite and melt at 1 atm SO AMERICAN MINERALOGIST LA English DT Article DE radium; anorthite; plagioclase; partition coefficient; partitioning; clinopyroxene; barium; strontium ID U-238 SERIES; ISLAND ARCS; CRYSTAL; DISEQUILIBRIA; RA-226/TH-230; CONSTRAINTS; TRANSPORT; ERUPTION; MANTLE; LAVAS AB We present the first experimental radium mineral/melt partitioning data, specifically between anorthite and a CNIAS melt at atmospheric pressure. Ra-226 disequilibria are an important chronometer of recent magmatic activity. Ion microprobe measurement of coexisting anorthite and glass phases produces a molar D-Ra = 0.040 +/- 0.006 and D-Ra/D-Ba = 0.24 +/- 0.05 at 1400 degrees C. Our results indicate that lattice strain partitioning models fit the divalent (Ca, Sr, Ba, Ra) partition coefficient data of this study well, supporting previous work on crustal melting and magma chamber dynamics that has relied on such models to approximate radium partitioning behavior in the absence of experimentally determined values. C1 CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA. Lawrence Livermore Natl Lab, Glenn T Seaborg Inst, Livermore, CA 94551 USA. RP Miller, SA (reprint author), CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA. EM smiller@gps.caltech.edu RI Asimow, Paul/E-7451-2010 OI Asimow, Paul/0000-0001-6025-8925 NR 29 TC 14 Z9 14 U1 1 U2 3 PU MINERALOGICAL SOC AMER PI CHANTILLY PA 3635 CONCORDE PKWY STE 500, CHANTILLY, VA 20151-1125 USA SN 0003-004X J9 AM MINERAL JI Am. Miner. PD AUG-SEP PY 2007 VL 92 IS 8-9 BP 1535 EP 1538 DI 10.2138/am.2007.2640 PG 4 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA 200XB UT WOS:000248795000031 ER PT J AU Van Berkel, GJ Kertesz, V AF Van Berkel, Gary J. Kertesz, Vilmos TI Using the electrochemistry of the electrospray ion source SO ANALYTICAL CHEMISTRY LA English DT Article ID IONIZATION-MASS-SPECTROMETRY; CURRENT ELECTROLYTIC CELL; ANALYTE ELECTROLYSIS; POTENTIAL GRADIENTS; MOLECULAR-IONS; EMITTER CELL; SOLUTION PH; OXIDATION; DERIVATIVES; MECHANISMS C1 Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol MS Grp, Oak Ridge, TN 37831 USA. RP Van Berkel, GJ (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol MS Grp, Oak Ridge, TN 37831 USA. EM vanberkelj@ornl.gov RI Kertesz, Vilmos/M-8357-2016 OI Kertesz, Vilmos/0000-0003-0186-5797 NR 48 TC 92 Z9 92 U1 4 U2 52 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 2007 VL 79 IS 15 BP 5510 EP 5520 PG 11 WC Chemistry, Analytical SC Chemistry GA 195UO UT WOS:000248437700017 PM 17703524 ER PT J AU Liu, GD Wu, H Dohnalkova, A Lin, YH AF Liu, Guodong Wu, Hong Dohnalkova, Alice Lin, Yuehe TI Apoferritin-templated synthesis of encoded metallic phosphate nanoparticle tags SO ANALYTICAL CHEMISTRY LA English DT Article ID DNA HYBRIDIZATION; CARBON NANOTUBES; COLLOIDAL GOLD; ELECTROCHEMICAL BIOSENSORS; LABEL; FERRITIN; PROTEIN; NANOSTRUCTURES; BIOTECHNOLOGY; FABRICATION AB Encoded metallic phosphate nanoparticle tags, with distinct encoding patterns, have been prepared using an apoferritin template. A center cavity structure as well as the dissociation and reconstructive characteristics of apoferritin at different pH environments provides a facile route for preparing such encoded nanoparticle tags. Encapsulation and diffusion approaches have been investigated during the preparation. The encapsulation approach, which is based on the dissociation and reconstruction of apoferritin at different pHs, exhibits an effective route to prepare such encoded metallic phosphate nanoparticle tags. The compositionally encoded nanoparticle tag leads to a high coding capacity with a large number of distinguishable voltammetric signals, reflecting the predetermined composition of the metal mixture solution (and hence the nanoparticle composition). Releasing the metal components from the nanoparticle tags at pH 4.6 acetate buffer avoids harsh dissolution conditions, such as strong acids. Such a synthesis of encoded nanoparticle tags, including single-component and compositionally encoded nanoparticle tags, is substantially simple, fast, and convenient compared to that of encoded metal nanowires and semiconductor nanoparticle (CdS, PbS, and ZnS) incorporated polystyrene beads. The encoded metallic phosphate nanoparticle tags thus show great promise for bioanalytical or product-tracking/identification/protection applications. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Lin, YH (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM yuehe.lin@pnl.gov RI Lin, Yuehe/D-9762-2011 OI Lin, Yuehe/0000-0003-3791-7587 FU NINDS NIH HHS [1 U01 NS058161-01]; NIOSH CDC HHS [R01 OH008173-01] NR 44 TC 33 Z9 34 U1 0 U2 22 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 2007 VL 79 IS 15 BP 5614 EP 5619 DI 10.1021/ac070086f PG 6 WC Chemistry, Analytical SC Chemistry GA 195UO UT WOS:000248437700030 PM 17600385 ER PT J AU Young, NL Sisto, MC Young, MN Grant, PG Killilea, DW LaMotte, L Wu, KJJ Lebrilla, CB AF Young, Nicolas L. Sisto, Michael C. Young, Meggie N. Grant, Patrick G. Killilea, David W. LaMotte, LaTasha Wu, Kuang Jen J. Lebrilla, Carlito B. TI Steady-state asymmetric nanospray dual ion source for accurate mass determination within a chromatographic separation SO ANALYTICAL CHEMISTRY LA English DT Article ID ELECTROSPRAY-IONIZATION SOURCE; CYCLOTRON RESONANCE; INTERNAL CALIBRATION; GAIN-CONTROL; SPECTROMETRY; ACCUMULATION; SAMPLE AB Here we report the design, implementation, and initial use of an asymmetric steady-state continuous dual-nanospray ion source. This new source design consists of two independently controlled and continuously operating nanospray interfaces with funnel shaped counter electrodes. A steady-state ion mixing region combines the ions from the two sources into a single ion beam in the intermediate region after ion extraction from the nanospray sources but before the bulk of the pressure gradient of the vacuum interface. With this design we have achieved robust mixing of ions with no loss of duty cycle and remarkable ionization characteristics that appear entirely noncompetitive and potentially beneficial. Ibis allows continuous introduction of internal mass calibration ions during a liquid chromatography-mass spectrometric analysis. This in turn allows for recalibration of individual spectra yielding sub part per million mass accuracy throughout the run. The steady-state approach presented here has several advantages over previous approaches. Since neither the voltage nor positions of the sprayers are changed, the nanospray has greater spray stability. The ions produced by the analyte sprayer are continuously sampled, as opposed to time-sharing which necessitates that the analyte ion stream be interrupted for some part of the duty cycle. There are no moving parts, no rapid changes to high voltages requiring additional control electronics, and no need for completely separate vacuum interfaces and the associated complexity. The sprayers are independently controlled and do not exhibit competition or mutual ionization suppression. This novel source has been implemented with a Bruker Apex II 9.4 T FTICR with a modified Apollo electrospray ion source as part of a nanoflow liquid chromatography-Fourier transform ion cyclotron resonance mass spectrometry analysis platform. Because of the low cost of implementation, the new source could potentially be applied to other forms of mass spectrometry, such as electrospray ionization-time-of-flight (ESI-TOF), which can benefit from internal mass calibration. C1 Lawrence Livermore Natl Lab, Biosecur & NanoSci Lab, Livermore, CA 94551 USA. Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. Drexel Univ, Coll Med, Philadelphia, PA 19104 USA. Childrens Hosp Oakland, Nutr & Metab Ctr, Res Inst, Oakland, CA 94609 USA. RP Young, NL (reprint author), Lawrence Livermore Natl Lab, Biosecur & NanoSci Lab, Livermore, CA 94551 USA. EM young78@llnl.gov OI Young, Nicolas/0000-0002-3323-2815 FU NICHD NIH HHS [R01 HD061923]; NIGMS NIH HHS [R01 GM049077, R01 GM049077-15, R21 GM074819-02, R21 GM074819, GM049077, R21 GM074819-01] NR 19 TC 5 Z9 5 U1 3 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 2007 VL 79 IS 15 BP 5711 EP 5718 DI 10.1021/ac070446z PG 8 WC Chemistry, Analytical SC Chemistry GA 195UO UT WOS:000248437700042 PM 17614364 ER PT J AU Yao, S Bakajin, O AF Yao, Shuhuai Bakajin, Olgica TI Improvements in mixing time and mixing uniformity in devices designed for studies of protein folding kinetics SO ANALYTICAL CHEMISTRY LA English DT Article ID X-RAY-SCATTERING; 3-DIMENSIONAL MICROFLUIDIC SYSTEMS; LOW REYNOLDS-NUMBERS; CURVED DUCTS; CYTOCHROME-C; FLOW; MIXER; FLUID; MICROCHANNELS; SIMULATIONS AB Using a microfluidic laminar flow mixer designed for studies of protein folding kinetics, we demonstrate a mixing time of 1 +/- 1 mu s with sample consumption on the order of femtomoles. We recognize two limitations of previously proposed designs: (1) size and shape of the mixing region, which limits mixing uniformity and (2) the formation of Dean vortices at high flow rates, which limits the mixing time. We address these limitations by using a narrow shape-optimized nozzle and by reducing the bend of the side channel streamlines. The final design, which combines both of these features, achieves the best performance. We quantified the mixing performance of the different designs by numerical simulation of coupled Navier-Stokes and convection- diffusion equations and experiments using fluorescence resonance energy-transfer (FRET)-labeled DNA. C1 Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, Livermore, CA 94550 USA. RP Bakajin, O (reprint author), Lawrence Livermore Natl Lab, Chem Mat & Life Sci Directorate, POB 5508, Livermore, CA 94550 USA. EM bakajin1@llnl.gov RI Bakajin, Olgica/A-9745-2008; Yao, Shuhuai/G-8672-2011; OI Yao, Shuhuai/0000-0001-7059-4092 NR 50 TC 40 Z9 41 U1 3 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 2007 VL 79 IS 15 BP 5753 EP 5759 DI 10.1021/ac070528n PG 7 WC Chemistry, Analytical SC Chemistry GA 195UO UT WOS:000248437700048 PM 17583912 ER PT J AU Stachowiak, JC Shugard, EE Mosier, BP Renzi, RF Caton, PF Ferko, SM de Vreugde, JLV Yee, DD Haroldsen, BL VanderNoot, VA AF Stachowiak, Jeanne C. Shugard, Erin E. Mosier, Bruce P. Renzi, Ronald F. Caton, Pamela F. Ferko, Scott M. de Vreugde, James L. Van Yee, Daniel D. Haroldsen, Brent L. VanderNoot, Victoria A. TI Autonomous microfluidic sample preparation system for protein profile-based detection of aerosolized bacterial cells and spores SO ANALYTICAL CHEMISTRY LA English DT Article ID MICROCHIP DEVICE; AGENTS; SEPARATION; PRECONCENTRATION; MICROSYSTEM; BIOWARFARE; FUTURE; WATER; LIVE AB For domestic and military security, an autonomous system capable of continuously monitoring for airborne biothreat agents is necessary. At present, no system meets the requirements for size, speed, sensitivity, and selectivity to warn against and lead to the prevention of infection in field settings. We present a fully automated system for the detection of aerosolized bacterial biothreat agents such as Bacillus subtilis (surrogate for Bacillus anthracis) based on protein profiling by chip gel electrophoresis coupled with a microfluidic sample preparation system. Protein profiling has previously been demonstrated to differentiate between bacterial organisms. With the goal of reducing response time, multiple microfluidic component modules, including aerosol collection via a commercially available collector, concentration, thermochemical lysis, size exclusion chromatography, fluorescent labeling, and chip gel electrophoresis were integrated together to create an autonomous collection/sample preparation/analysis system. The cycle time for sample preparation was approximately 5 min, while total cycle time, including chip gel electrophoresis, was approximately 10 min. Sensitivity of the coupled system for the detection of B. subtilis spores was 16 agent-containing particles per liter of air, based on samples that were prepared to simulate those collected by wetted cyclone aerosol collector of similar to 80% efficiency operating for 7 min. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP VanderNoot, VA (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. EM vavande@sandia.gov OI Shugard, Erin/0000-0001-7688-8999 NR 29 TC 33 Z9 33 U1 0 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 2007 VL 79 IS 15 BP 5763 EP 5770 DI 10.1021/ac070567z PG 8 WC Chemistry, Analytical SC Chemistry GA 195UO UT WOS:000248437700050 PM 17591754 ER PT J AU Pasilis, SP Kertesz, V Van Berkel, GJ AF Pasilis, Sofie P. Kertesz, Vilmos Van Berkel, Gary J. TI Surface scanning analysis of planar arrays of analytes with desorption electrospray ionization-mass spectrometry SO ANALYTICAL CHEMISTRY LA English DT Article ID AMBIENT CONDITIONS; DESI; MECHANISMS AB The analysis of analytes deposited on, separated on, or otherwise distributed about a planar surface using desorption electrospray ionization mass spectrometry in a surface scanning sampling mode was investigated. The physical regions of the surface-impacting solvent/gas jet desorption/ionization plume were described. Under the conditions typical for desorption electrospray ionization used here, the impact plume formed an elliptical desorption/ionization region on the surface. Most effective desorption/ionization was obtained from a smaller elliptical area within the larger impact region that was centered on a point on-axis from the sprayer tip to the surface. Maximum signal from a given amount of material on a surface was observed with proper plume and sample alignment when the diameter of the sample spot was less than the diameter of the central high-efficiency desorption/ionization region of the impact plume. Solvent and gas flow out of this high-efficiency desorption/ionization region was found to limit analyte accessibility to this region via a "washing effect" when analytes were on smooth surfaces or on surfaces for which the analyte had little affinity. As such, the direction of surface scanning and scan speed during an analysis was found to be important for maximizing signal levels and signal reproducibility on particular surface types. Overall, the results presented illustrate means to improve analysis of sample spots on various types of surfaces using desorption electrospray ionization mass spectrometry in a surface scanning mode. C1 Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectromet Grp, Oak Ridge, TN 37831 USA. RP Van Berkel, GJ (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectromet Grp, Oak Ridge, TN 37831 USA. EM vanberkelgj@ornl.gov RI Kertesz, Vilmos/M-8357-2016 OI Kertesz, Vilmos/0000-0003-0186-5797 NR 11 TC 46 Z9 46 U1 2 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 2007 VL 79 IS 15 BP 5956 EP 5962 DI 10.1021/ac070527v PG 7 WC Chemistry, Analytical SC Chemistry GA 195UO UT WOS:000248437700072 PM 17605468 ER PT J AU Cavazzini, A Gritti, F Kaczmarski, K Marchetti, N Guiochon, G AF Cavazzini, Alberto Gritti, Fabrice Kaczmarski, Krzysztof Marchetti, Nicola Guiochon, Georges TI Mass-transfer kinetics in a shell packing material for chromatography SO ANALYTICAL CHEMISTRY LA English DT Article ID SIZE-EXCLUSION CHROMATOGRAPHY; LIQUID-CHROMATOGRAPHY; DIFFUSION-COEFFICIENTS; STATIONARY PHASES; COLUMNS; SEPARATION; PROTEINS; SPEED; GAS; ADSORPTION AB A shell particle consists of a solid, nonporous core that is surrounded with a shell of a porous solid having essentially the same physicochemical. properties as those of the conventional porous particles used as packing media in chromatography. The diameter of the solid core and the thickness of its shell or the external diameter of the particle characterizes the chromatographic properties of the packing material. The potential advantage of this particle structure would be the shorter average path length experienced by solute molecules during their diffusion across the particles of packing material when they are retained. Compounds having slow pore diffusion would exhibit higher efficiencies on columns packed with shell than with conventional, fully porous particles. Using columns packed with Halo, a new type of porous silica shell particles, we assess the gain achieved with this principle for peptides of moderate molecular weights and for small proteins. C1 Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Rzeszow Univ Technol, Fac Chem, PL-35959 Rzeszow, Poland. RP Guiochon, G (reprint author), Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. EM guiochon@utk.edu RI Marchetti, Nicola/G-4933-2010; Cavazzini, Alberto/B-7051-2015; OI Cavazzini, Alberto/0000-0002-2510-0871; Marchetti, Nicola/0000-0001-5595-570X NR 40 TC 95 Z9 97 U1 1 U2 23 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 2007 VL 79 IS 15 BP 5972 EP 5979 DI 10.1021/ac070571a PG 8 WC Chemistry, Analytical SC Chemistry GA 195UO UT WOS:000248437700074 PM 17580955 ER PT J AU Suwa, G Asfaw, B Haile-Selassie, Y White, T Katoh, S WoldeGabriel, G Hart, WK Nakaya, H Beyene, Y AF Suwa, Gen Asfaw, Berhane Haile-Selassie, Yohannes White, Tim Katoh, Shigehiro WoldeGabriel, Giday Hart, William K. Nakaya, Hideo Beyene, Yonas TI Early pleistocene Homo erectus fossils from konso, southern Ethiopia SO ANTHROPOLOGICAL SCIENCE LA English DT Article DE hominid evolution; homo erectus; early pleistocene; konso; Ethiopia ID PALEOANTHROPOLOGICAL RESEARCH AREA; TURKANA-BASIN; EVOLUTIONARY HISTORY; MIDDLE AWASH; PLIOPLEISTOCENE TEPHRA; DISTRIBUTION PATTERNS; TAXONOMIC AFFINITIES; ENAMEL THICKNESS; KOOBI-FORA; GENUS HOMO AB Homo erectus has been broadly defined to include fossils from Africa, Asia, and possibly Europe, or restricted to a supposedly confined Asian clade. Recently discovered fossils of H. erectus are allowing new insights into aspects of its evolution, such as the timing and mode of the species' emergence in Africa and its relationship to Asian populations. However, the currently available African record predating 1.0 Ma is poor, consisting of the Turkana basin, Olduvai and the more limited South African materials. Here, we describe and compare eight craniodental fossils of similar to 1.4 Ma recovered from Konso, Ethiopia, that we attribute to H. erectus. These include KGA 10- 1, one of the better-preserved H. erectus mandibular specimens known from eastern Africa, and other fragmentary dental and cranial remains. The Konso H. erectus fossils show a mosaic of primitive and derived features. These include a large and thick mandibular corpus, a moderately developed lateral prominence, a reduced premolar morphology, and a tendency for smaller relative sizes of the posterior molars compared with earlier Homo. In some dentognathic details, such as the lack of a buccolingually narrow M1 and the presence of double mental foramina, the Konso fossils differ from eastern African H. erectus of >= 1.5 Ma. The fragmentary cranial remains exhibit weak angular and occipital tori, and an apparently weak occipital flexion, as with the eastern African H. erectus examples known from similar to 1.65 to 1.2 Ma. The available evidence is consistent with the interpretation that African early H. erectus shows morphological continuity within the similar to 1.65 to 1.0 Ma time period, with relatively little morphological evolution prior to 1.4 Ma and advanced dentognathic gracility occurring sometime thereafter. The Konso evidence corroborates the hypothesis that the African H. erectus populations represent a variable but continuous evolutionary succession that was a likely source of multiple events of gene flow to the Eurasian continent. C1 Univ Tokyo, Univ Museum, Bunkyo Ku, Tokyo 1130033, Japan. Rift Valley Res Serv, Addis Ababa, Ethiopia. Cleveland Museum Nat Hist, Dept Phys Anthropol, Cleveland, OH 44106 USA. Univ Calif Berkeley, Museum Vertebrate Zool, Human Evolut Res Ctr, Berkeley, CA 94720 USA. Hyogo Museum Nat & Human Activ, Div Earth Sci, Sanda, Hyogo 6691546, Japan. Los Alamos Natl Lab, Hydrol Geochem & Geol Grp, Los Alamos, NM 87545 USA. Miami Univ, Dept Geol, Oxford, OH 45056 USA. Kagoshima Univ, Dept Earth & Environm Sci, Kagoshima 8900065, Japan. Minist Youth Sports & Culture, Author Res & Conservat Cultural Heritage, Dept Anthropol & Archaeol, Addis Ababa, Ethiopia. RP Suwa, G (reprint author), Univ Tokyo, Univ Museum, Bunkyo Ku, Tokyo 1130033, Japan. EM suwa@um.u-tokyo.ac.jp NR 90 TC 40 Z9 42 U1 4 U2 23 PU ANTHROPOLOGICAL SOC NIPPON PI TOKYO PA C/O GALILEO INC, URBAN-OHTSUKA BLDG, 3RD FL, 3-21-10 KITA-OHTSUKA, TOSHIMA-KU, TOKYO, 170-0004, JAPAN SN 0918-7960 EI 1348-8570 J9 ANTHROPOL SCI JI Anthropol. Sci. PD AUG PY 2007 VL 115 IS 2 BP 133 EP 151 DI 10.1537/ase.061203 PG 19 WC Anthropology; Evolutionary Biology SC Anthropology; Evolutionary Biology GA 223CN UT WOS:000250347300005 ER PT J AU Zhang, WW Culley, DE Nie, L Scholten, JCM AF Zhang, Weiwen Culley, David E. Nie, Lei Scholten, Johannes C. M. TI Comparative transcriptome analysis of Desulfovibrio vulgaris grown in planktonic culture and mature biofilm on a steel surface SO APPLIED MICROBIOLOGY AND BIOTECHNOLOGY LA English DT Article DE transcriptome analysis; biofilm; corrosion; Desulfovibrio vulgaris ID SULFATE-REDUCING BACTERIA; ESCHERICHIA-COLI BIOFILMS; GENE-EXPRESSION; MILD-STEEL; STAPHYLOCOCCUS-EPIDERMIDIS; STREPTOCOCCUS-MUTANS; MYXOCOCCUS-XANTHUS; CORROSION; SYSTEM; HILDENBOROUGH AB Biofilm build-up of sulphate-reducing bacteria (SRB) on metal surfaces may lead to severe corrosion of iron. To understand the processes at molecular level, in this study, a whole-genome oligonucleotide microarray was used to examine differential expression patterns between planktonic populations and mature biofilm of Desulfovibrio vulgaris on a steel surface. Statistical analysis revealed that 472 genes were differentially expressed (1.5-fold or more with a q value less than 0.025) by comparing the biofilm cells with the planktonic cells. Among the differentially expressed genes were several that corresponded to genes identified in many aerobic bacterial biofilms (i.e., Pseudomonas species and Escherichia coli) such as genes encoding flagellin, a flagellar motor switch protein, chemotaxis proteins involved in cell motility, as well as genes involved in exopolysaccharide biosynthesis. In addition, the biofilm-bound cells of D. vulgaris exhibited decreased transcription of genes involved in protein synthesis, energy metabolism and sulfate reduction, as well as genes involved in general stress responses. These findings were all consistent with early suggestion that the average physiology of the biofilm cells were similar to cells reduced in growth. Most notably, up-regulation of large number of outer membrane proteins was observed in the D. vulgaris biofilm. Although their function is still unknown, the higher expression of these genes in the biofilm could implicate important roles in the formation and maintenance of multi-cellular consortium on a steel surface. The study provided insights into the metabolic networks associated with the formation and maintenance of a D. vulgaris biofilm on a steel surface. C1 Pacific NW Natl Lab, Dept Microbiol, Richland, WA 99352 USA. Georgetown Univ, Dept Biostat Bioinformat & Biomath, Washington, DC 20057 USA. RP Zhang, WW (reprint author), Pacific NW Natl Lab, Dept Microbiol, 902 Battelle Blvd,Mail Stop P7-50,POB 999, Richland, WA 99352 USA. EM wwzhang22@gmail.com; Johannes.Scholten@pnl.gov NR 50 TC 17 Z9 19 U1 1 U2 17 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0175-7598 J9 APPL MICROBIOL BIOT JI Appl. Microbiol. Biotechnol. PD AUG PY 2007 VL 76 IS 2 BP 447 EP 457 DI 10.1007/s00253-007-1014-9 PG 11 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 193UE UT WOS:000248299800021 PM 17571259 ER PT J AU Danylov, AA Waldman, J Goyette, TM Gatesman, AJ Giles, RH Linden, KJ Neal, WR Nixon, WE Wanke, MC Reno, JL AF Danylov, Andriy A. Waldman, Jerry Goyette, Thomas M. Gatesman, Andrew J. Giles, Robert H. Linden, Kurt J. Neal, William R. Nixon, William E. Wanke, Michael C. Reno, John L. TI Transformation of the multimode terahertz quantum cascade laser beam into a Gaussian, using a hollow dielectric waveguide SO APPLIED OPTICS LA English DT Article ID WAVEGUIDE LASER; HETERODYNE RECEIVER; MODES AB We demonstrate that a short hollow dielectric tube can act as a dielectric waveguide and transform the multimode, highly diverging terahertz quantum cascade laser beam into the lowest order dielectric waveguide hybrid mode, EH11, which then couples efficiently to the free-space Gaussian mode, TEMoo. This simple approach should enable terahertz quantum cascade lasers to be employed in applications where a spatially coherent beam is required. (c) 2007 Optical Society of America. C1 Univ Massachusetts Lowell, Submillimeter Wave Technol Lab, Lowell, MA 01854 USA. Spire Corp, Bedford, MA 01730 USA. USA, Natl Ground Intelligence Ctr, Charlottesville, VA 22911 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Danylov, AA (reprint author), Univ Massachusetts Lowell, Submillimeter Wave Technol Lab, Lowell, MA 01854 USA. EM andriy_danylov@student.uml.edu NR 25 TC 26 Z9 27 U1 0 U2 4 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD AUG 1 PY 2007 VL 46 IS 22 BP 5051 EP 5055 DI 10.1364/AO.46.005051 PG 5 WC Optics SC Optics GA 206EQ UT WOS:000249167100028 PM 17676114 ER PT J AU Savukov, I Budker, D AF Savukov, Igor Budker, Dmitry TI Wave-plate retarders based on overhead transparencies SO APPLIED OPTICS LA English DT Article ID FILM AB We describe procedures for constructing inexpensive wave plates of desired retardation out of ordinary commercially available transparencies. Various relevant properties of the transparencies are investigated: the dependence of retardation on rotation of the film, tilt, wavelength, position, and temperature. A transparency is typically a multiple-order wave plate with the difference of in-plane refractive indices of similar to 0.07 and a temperature dependence of retardation similar to 0.02 rad/K. Constructing wave plates out of combinations of transparency sheets is also explored. (c) 2007 Optical Society of America. C1 Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Savukov, I (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. EM isavukov@lanl.gov RI Budker, Dmitry/F-7580-2016 OI Budker, Dmitry/0000-0002-7356-4814 NR 17 TC 6 Z9 6 U1 0 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD AUG 1 PY 2007 VL 46 IS 22 BP 5129 EP 5136 DI 10.1364/AO.46.005129 PG 8 WC Optics SC Optics GA 206EQ UT WOS:000249167100037 PM 17676123 ER PT J AU Kuzmanoski, M Box, MA Schmid, B Russell, PB Redemann, J AF Kuzmanoski, Maja Box, Michael A. Schmid, Beat Russell, Philip B. Redemann, Jens TI Case study of modeled aerosol optical properties during the SAFARI 2000 campaign SO APPLIED OPTICS LA English DT Article ID SINGLE-SCATTERING ALBEDO; SOUTHERN AFRICA; SIZE DISTRIBUTIONS; LIGHT-ABSORPTION; WAVELENGTH DEPENDENCE; RADIATIVE PROPERTIES; SKY RADIANCE; DRY SEASON; IN-SITU; PARTICLES AB We present modeled aerosol optical properties (single scattering albedo, asymmetry parameter, and lidar ratio) in two layers with different aerosol loadings and particle sizes, observed during the Southern African Regional Science Initiative 2000 (SAFARI 2000) campaign. The optical properties were calculated from aerosol size distributions retrieved from aerosol layer optical thickness spectra, measured using the NASA Ames airborne tracking 14-channel sunphotometer (AATS-14) and the refractive index based on the available information on aerosol chemical composition. The study focuses on sensitivity of modeled optical properties in the 0.3-1.5 mu m wavelength range to assumptions regarding the mixing scenario. We considered two models for the mixture of absorbing and nonabsorbing aerosol components commonly used to model optical properties of biomass burning aerosol: a layered sphere with absorbing core and nonabsorbing shell and the Maxwell-Garnett effective medium model. In addition, comparisons of modeled optical properties with the measurements are discussed. We also estimated the radiative effect of the difference in aerosol absorption implied by the large difference between the single scattering albedo values (similar to 0.1 at midvisible wavelengths) obtained from different measurement methods for the case with a high amount of biomass burning particles. For that purpose, the volume fraction of black carbon was varied to obtain a range of single scattering albedo values (0.81-0.91 at lambda = 0.50 mu m). The difference in absorption resulted in a significant difference in the instantaneous radiative forcing at the surface and the top of the atmosphere (TOA) and can result in a change of the sign of the aerosol forcing at TOA from negative to positive. (C) 2007 Optical Society of America. C1 Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia. Bay Area Environm Res Inst, Sonoma, CA 95476 USA. Pacific NW Natl Lab, MSIN, Richland, WA 99352 USA. NASA, Ames Res Ctr, Moffett Field, CA 94035 USA. RP Kuzmanoski, M (reprint author), Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia. EM mkuzm@phys.unsw.edu.au NR 56 TC 0 Z9 3 U1 0 U2 3 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD AUG 1 PY 2007 VL 46 IS 22 BP 5263 EP 5275 DI 10.1364/AO.46.005263 PG 13 WC Optics SC Optics GA 206EQ UT WOS:000249167100054 PM 17676140 ER PT J AU Baba, JS Boudreaux, PR AF Baba, Justin Shekwoga Boudreaux, Philip Ryan TI Wavelength, temperature, and voltage dependent calibration of a nematic liquid crystal multispectral polarization generating device SO APPLIED OPTICS LA English DT Article AB Rapid calibration of liquid crystal variable retarder (LCVR) devices is critical for successful clinical implementation of a LC-based Mueller matrix imaging system being developed for noninvasisve skin cancer detection. For multispectral implementation of such a system, the effect of wavelength (lambda), temperature (T), and voltage (V) on the retardance (delta) required to generate each desired polarization state needs to be clearly understood. Calibration involves quantifying this interdependence such that for a given set of system input variables (lambda, T), the appropriate voltage is applied across a LC cell to generate a particular retardance. This paper presents findings that elucidate the dependence of voltage, for a set retardance, on the aforementioned variables for a nematic LC cell: similar to 253 mV/100 nm lambda-dependence and similar to 10 mV/degrees C T-dependence. Additionally, an empirically derived model is presented that enables initial voltage calibration of retardance for any desired input wavelength within the calibration range of 460-905 nm. (c) 2007 Optical Society of America. C1 Oak Ridge Natl Lab, Engn Sci & Technol Div, Oak Ridge, TN 37832 USA. RP Baba, JS (reprint author), Oak Ridge Natl Lab, Engn Sci & Technol Div, 1 Bethel Valley Rd,POB 2008,MS 6006, Oak Ridge, TN 37832 USA. EM babajs@ornl.gov OI Boudreaux, Philip/0000-0002-2956-4665 NR 5 TC 11 Z9 12 U1 1 U2 8 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 1559-128X EI 2155-3165 J9 APPL OPTICS JI Appl. Optics PD AUG 1 PY 2007 VL 46 IS 22 BP 5539 EP 5544 DI 10.1364/AO.46.005539 PG 6 WC Optics SC Optics GA 206EQ UT WOS:000249167100085 PM 17676171 ER PT J AU Salvetti, F Patelli, P Nicolo, S AF Salvetti, Franco Patelli, Paolo Nicolo, Simone TI Chaotic time series prediction for the game, Rock-Paper-Scissors SO APPLIED SOFT COMPUTING LA English DT Article DE time series prediction; chaos theory; game theory; local lyapunov exponent; entropy filtering; reinforcement learning; agent irrationality; Rock Paper Scissors game ID LYAPUNOV EXPONENTS; NASH EQUILIBRIUM AB Two players of Rock-Paper-Scissors are modeled as adaptive agents which use a reinforcement learning algorithm and exhibit chaotic behavior in terms of trajectories of probability in mixed strategies space. This paper demonstrates that an external super-agent can exploit the behavior of the other players to predict favorable moments to play against one of the other players the symbol suggested by a sub-optimal strategy. This third agent does not affect the learning process of the other two players, whose only goal is to beat each other. The choice of the best moment to play is based on a threshold associated with the Local Lyapunov Exponent or the Entropy, each computed by using the time series of symbols played by one of the other players. A method for automatically adapting such a threshold is presented and evaluated. The results show that these techniques can be used effectively by a super-agent in a game involving adaptive agents that exhibit collective chaotic behavior. (c) 2006 Elsevier B.V. All rights reserved. C1 Univ Colorado, Dept Comp Sci, Boulder, CO 80309 USA. Los Alamos Natl Lab, Div Theoret, Complex Syst Grp T 13, Los Alamos, NM 87545 USA. RP Salvetti, F (reprint author), Univ Colorado, Dept Comp Sci, 430 UCB, Boulder, CO 80309 USA. EM franco.salvetti@colorado.edu; paolo@lanl.gov; simone.nicolo@colorado.edu RI Dao, Rock/E-5736-2014 NR 23 TC 4 Z9 5 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1568-4946 J9 APPL SOFT COMPUT JI Appl. Soft. Comput. PD AUG PY 2007 VL 7 IS 4 BP 1188 EP 1196 DI 10.1016/j.asoc.2006.01.006 PG 9 WC Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Computer Science GA 211CN UT WOS:000249502000007 ER PT J AU Oudemans, TFM Boon, JJ Botto, RE AF Oudemans, T. F. M. Boon, J. J. Botto, R. E. TI FTIR and solid-state C-13 CP/MAS NMR spectroscopy of charred and non-charred solid organic residues preserved in roman iron age vessels from the Netherlands SO ARCHAEOMETRY LA English DT Article DE roman iron age; organic residues; char; vessel; use; NMR; FTIR; proteins; lipids ID NUCLEAR-MAGNETIC-RESONANCE; CHROMATOGRAPHY MASS-SPECTROMETRY; ARCHAEOLOGICAL MATERIALS; LABORATORY SIMULATIONS; CELLULOSE CHARS; IDENTIFICATION; POTTERY; PYROLYSIS; POTSHERDS; TRANSFORMATION AB In this study, solid-state C-13 magnetic resonance spectroscopy using cross-polarization combined with high-powered proton decoupling and magic-angle sample spinning and Fourier transform infrared spectroscopy using a diamond anvil cell, are employed to give information about the organic functional groups present in charred and non-charred solid organic residues and to give an insight into the degree of condensation of the chars. Residues were preserved in ceramic vessels recovered from the indigenous settlement of Uitgeest-Groot Dorregeest, dating back to the Roman period. In addition, the application of these solid-state techniques is used for verification of earlier results obtained in analytical pyrolysis studies and to clarify the relationship between the already thermally degraded charred residues and the controlled heating fragmentation taking place during analytical pyrolysis and direct temperature-resolved mass spectrometry. C1 FOM, Inst Atom & Mol Phys, NL-1009 DB Amsterdam, Netherlands. Leiden Univ, Fac Archaeol, NL-2300 RA Leiden, Netherlands. Argonne Natl Lab, Div Chem, Argonne, IL 60539 USA. RP Oudemans, TFM (reprint author), FOM, Inst Atom & Mol Phys, POB 41883, NL-1009 DB Amsterdam, Netherlands. NR 83 TC 13 Z9 13 U1 4 U2 19 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0003-813X J9 ARCHAEOMETRY JI Archaeometry PD AUG PY 2007 VL 49 BP 571 EP 594 DI 10.1111/j.1475-4754.2007.00321.x PN 3 PG 24 WC Archaeology; Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Geosciences, Multidisciplinary SC Archaeology; Chemistry; Geology GA 209DT UT WOS:000249369900010 ER PT J AU Volkow, ND Wang, GJ Newcorn, J Telang, F Solanto, MV Fowler, JS Logan, J Ma, Y Schulz, K Pradhan, K Wong, C Swanson, JM AF Volkow, Nora D. Wang, Gene-Jack Newcorn, Jeffrey Telang, Frank Solanto, Mary V. Fowler, Joanna S. Logan, Jean Ma, Yeming Schulz, Kurt Pradhan, Kith Wong, Christopher Swanson, James M. TI Depressed dopamine activity in caudate and preliminary evidence of limbic involvement in adults with attention-deficit/hyperactivity disorder SO ARCHIVES OF GENERAL PSYCHIATRY LA English DT Article ID DEFICIT HYPERACTIVITY DISORDER; POSITRON-EMISSION-TOMOGRAPHY; C-11 RACLOPRIDE; HUMAN BRAIN; INTRAVENOUS METHYLPHENIDATE; EXTRACELLULAR DOPAMINE; ORAL METHYLPHENIDATE; PREFRONTAL CORTEX; WORKING-MEMORY; ADHD AB Context: Attention-deficit/hyperactivity disorder (ADHD) is the most prevalent psychiatric disorder of childhood. There is considerable evidence that brain dopamine is involved in ADHD, but it is unclear whether dopamine activity is enhanced or depressed. Objective: To. test the hypotheses that striatal dopamine activity is depressed in ADHD and that this contributes to symptoms of inattention. Design: Clinical (ADHD adult) and comparison (healthy control) subjects were scanned with positron emission tomography and raclopride labeled with carbon 11 (D-2/D-3 receptor radioligand sensitive to competition with endogenous dopamine) after placebo and after intravenous methylphenidate hydrochloride (stimulant that increases extracellular dopamine by blocking dopamine transporters). The difference in ["Clraclopride's specific binding between placebo and methylphenidate was used as marker of dopamine release. Symptoms were quantified, using the Conners Adult ADHD Rating Scales. Setting: Outpatient setting. Participants: Nineteen adults with ADHD who had never received medication and 24 healthy controls. Results: With the placebo, D-2/D-3 receptor availability in left caudate was lower (P<.05)in subjects with ADHD than in controls. Methylphenidate induced smaller decrements in [C-11] raclopride binding in left and right caudate (blunted DA increases) (P<.05) and higher scores on self-reports of "drug liking" in ADHD than in control subjects. The blunted response to methylphenidate in caudate was associated with symptoms of inattention (P<.05) and with higher self-reports of drug liking (P<.01). Exploratory analysis using statistical parametric mapping revealed that methylphenidate also decreased [C-11]raclopride binding in hippocampus and amygdala and that these decrements were smaller in subjects with ADHD (P<.001). Conclusions: This study reveals depressed dopamine activity in caudate and preliminary evidence in limbic regions in adults with ADHD that was associated with inattention and with enhanced reinforcing responses to intravenous methylphenidate. This suggests that dopamine dysfunction is involved with symptoms of inattention but may also contribute to substance abuse comorbidity in ADHD. C1 NIDA, Bethesda, MD 20892 USA. NIAAA, Lab Neuroimaging, Bethesda, MD USA. Brookhaven Natl Lab, Med Dept, Upton, NY 11973 USA. Brookhaven Natl Lab, Chem Dept, Upton, NY 11973 USA. Mt Sinai Med Ctr, Dept Psychiat, New York, NY USA. SUNY Stony Brook, Dept Math Appl, Stony Brook, NY USA. Univ Calif Irvine, Child Dev Ctr, Irvine, CA 92697 USA. RP Volkow, ND (reprint author), NIDA, 6001 Execut Blvd,Room 5274, Bethesda, MD 20892 USA. EM nvolkow@nida.nih.gov OI Newcorn, Jeffrey /0000-0001-8993-9337 FU Intramural NIH HHS; NIMH NIH HHS [MH66961-02] NR 58 TC 159 Z9 165 U1 1 U2 17 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610-0946 USA SN 0003-990X J9 ARCH GEN PSYCHIAT JI Arch. Gen. Psychiatry PD AUG PY 2007 VL 64 IS 8 BP 932 EP 940 DI 10.1001/archpsyc.64.8.932 PG 9 WC Psychiatry SC Psychiatry GA 197GM UT WOS:000248542600008 PM 17679638 ER PT J AU Williams, PT Hoffman, K La, I AF Williams, Paul T. Hoffman, Kathryn La, Isabelle TI Weight-related increases in hypertension, hypercholesterolemia, and diabetes risk in normal weight male and female runners SO ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY LA English DT Article DE hypertension; hypercholesterolemia; diabetes; exercise ID BODY-FAT DISTRIBUTION; SAGITTAL ABDOMINAL DIAMETER; PHYSICAL-ACTIVITY; MASS INDEX; HIP CIRCUMFERENCES; BLOOD-PRESSURE; WOMEN; MEN; EXERCISE; DISEASE AB Background - Although 36% of US men and 42% of US women are of normal weight, the health implications of greater weight in ostensibly normal-weight individuals are seldom acknowledged. Methods and Results - Self-reported physician-diagnosed incident diabetes, high cholesterol, and hypertension were compared with adult body mass index ( BMI), and body circumferences in 29 139 male and 11 985 female nonsmoking runners followed prospectively for 7.7 and 7.4 years, respectively. Included among these were 20 731 men and 11 197 women who were of normal weight at baseline ( BMI < 25 kg/m(2)). During follow-up, 2342 men (8.53%) and 499 women (4.26%) became hypertensive, 3330 men (12.2%) and 599 women (5.14%) were diagnosed with high cholesterol, and 197 men (0.68%) and 28 women (0.23%) became diabetic. Increasing BMI and waist circumference at baseline significantly increased the log odds for normal-weight men becoming hypertensive (P < 0.0001), hypercholesterolemic (P < 0.0001), and diabetic ( P < 0.02), and for normal-weight women becoming hypertensive ( P < 0.05). The log odds for being diagnosed with high cholesterol also increased with baseline BMI in normal-weight women (P < 0.05). Relative to men with BMI < 20 kg/ m(2), the odds for being diagnosed with hypertension or high cholesterol increased by 45% ( P = 0.05) and 64% ( P = 0.002), respectively, for those with 20 <= BMI < 22.5 kg/ m2, and by 121% (P < 0.0001) and 135% ( P < 0.0001), respectively, for those with 22.5 <= BMI < 25 kg/ m2. The odds for women with 22.5 <= BMI < 25 kg/ m2 developing hypertension or high cholesterol were 33% ( P < 0.02) and 29% ( P = 0.03) higher, respectively, than for women with 20 <= BMI < 22.5 kg/ m2, and 64% ( P = 0.0007) and 41% ( P = 0.008) higher, respectively, than women with BMI < 20 kg/ m2. Relative to men and women with BMI < 22.5 kg/ m2, the odds for developing diabetes during follow-up increased by 119% ( P = 0.009) and 116% ( P = 0.17), respectively, for those with 22.5 <= BMI < 25 kg/ m2. Conclusions - Greater BMI and larger waist circumference increase the risks for hypertension, high cholesterol, and diabetes even among normal-weight nonsmoking runners, although overall risks remain relatively low vis-a-vis those for the overweight or obese. C1 Ernest Orlando Lawrence Berkeley Natl Lab, Donner Lab, Life Sci Div, Berkeley, CA 94720 USA. RP Williams, PT (reprint author), Ernest Orlando Lawrence Berkeley Natl Lab, Donner Lab, Life Sci Div, Berkeley, CA 94720 USA. EM ptwilliams@lbl.gov FU NHLBI NIH HHS [HL-072110, HL-45652]; NIDDK NIH HHS [DK066738] NR 40 TC 27 Z9 27 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 1079-5642 J9 ARTERIOSCL THROM VAS JI Arterioscler. Thromb. Vasc. Biol. PD AUG PY 2007 VL 27 IS 8 BP 1811 EP 1819 DI 10.1161/ATVBAHA.107.141853 PG 9 WC Hematology; Peripheral Vascular Disease SC Hematology; Cardiovascular System & Cardiology GA 192BR UT WOS:000248176200021 PM 17510467 ER PT J AU Dieckmann, J Roth, K Brodrick, J AF Dieckmann, John Roth, Kurt Brodrick, James TI Magnetic refrigeration SO ASHRAE JOURNAL LA English DT Editorial Material C1 TIAX LLC, Cambridge, MA USA. Bldg Technol Program, US Dept Energy, Washington, DC USA. RP Dieckmann, J (reprint author), TIAX LLC, Cambridge, MA USA. NR 4 TC 1 Z9 1 U1 1 U2 2 PU AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC, PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2491 J9 ASHRAE J JI ASHRAE J. PD AUG PY 2007 VL 49 IS 8 BP 74 EP 76 PG 3 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA 201JE UT WOS:000248826500017 ER PT J AU De Vries, WH Hodge, JA Becker, RH White, RL Helfand, DJ AF De Vries, W. H. Hodge, J. A. Becker, R. H. White, R. L. Helfand, D. J. TI Star formation in low radio luminosity active galactic nuclei from the Sloan Digital Sky Survey SO ASTRONOMICAL JOURNAL LA English DT Article DE galaxies : active; galaxies : starburst; radio continuum : galaxies ID CENTER BLACK-HOLE; HOST GALAXIES; SAGITTARIUS-A; DATA RELEASE; 1ST SURVEY; QUASARS; EMISSION; CLASSIFICATION; DISKS; GHZ AB We investigate faint radio emission from low- to high-luminosity active galactic nuclei (AGNs) selected from the Sloan Digital Sky Survey. Their radio properties are inferred by co-adding large ensembles of radio image cut-outs from the FIRST survey, as almost all of the sources are individually undetected. We correlate the median radio flux densities against a range of other sample properties, including median values for redshift, [O III] luminosity, emission-line ratios, and the strength of the 4000 A break. We detect a strong trend for sources that are actively undergoing star formation to have excess radio emission beyond the 10(28) ergs s(-1) Hz(-1) level found for sources without any discernible star formation. Furthermore, this additional radio emission correlates well with the strength of the 4000 A break in the optical spectrum, and may be used to assess the age of the star-forming component. We examine two subsamples, one containing the systems with emission-line ratios most like star-forming systems, and one with the sources that have characteristic AGN ratios. This division also separates the mechanism responsible for the radio emission (star formation vs. AGNs). For both cases we find a strong, almost identical correlation between [O III] and radio luminosity, with the AGN sample extending toward lower, and the star formation sample toward higher luminosities. A clearer separation between the two subsamples is seen as function of the central velocity dispersion a of the host galaxy. For systems at similar redshifts and values of sigma, the star formation subsample is brighter than the AGN in the radio by an order of magnitude. This underlines the notion that the radio emission in star-forming systems can dominate the emission associated with the AGN. C1 Univ Calif Davis, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA. RP De Vries, WH (reprint author), Univ Calif Davis, 1 Shields Ave, Davis, CA 95616 USA. EM devries1@llnl.gov RI White, Richard/A-8143-2012 NR 38 TC 16 Z9 16 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-6256 J9 ASTRON J JI Astron. J. PD AUG PY 2007 VL 134 IS 2 BP 457 EP 465 DI 10.1086/518866 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 197XY UT WOS:000248591800002 ER PT J AU Schwarz, GJ Woodward, CE Bode, MF Evans, A Eyres, SP Geballe, TR Gehrz, RD Greenhouse, MA Helton, LA Liller, W Lyke, JE Lynch, DK O'Brien, TJ Rudy, RJ Russell, RW Shore, SN Starrfield, SG Temm, T Truran, JW Venturini, CC Wagner, RM Williams, RE Zamanov, R AF Schwarz, G. J. Woodward, C. E. Bode, M. F. Evans, A. Eyres, S. P. Geballe, T. R. Gehrz, R. D. Greenhouse, M. A. Helton, L. A. Liller, W. Lyke, J. E. Lynch, D. K. O'Brien, T. J. Rudy, R. J. Russell, R. W. Shore, S. N. Starrfield, S. G. Temm, T. Truran, J. W. Venturini, C. C. Wagner, R. M. Williams, R. E. Zamanov, R. TI The early spectrophotometric evolution of V1186 Scorpii (nova Scorpii 2004 no. 1) SO ASTRONOMICAL JOURNAL LA English DT Article DE stars : dwarf novae; stars : individual (V1186 Sco) ID SPITZER-SPACE-TELESCOPE; INFRARED PHOTOMETRY; ABUNDANCE ANALYSIS; CLASSICAL NOVAE; VULPECULAE 1984; PW VULPECULAE; LIGHT-CURVE; NEON NOVA; SPECTROGRAPH; MICRON AB We report optical photometry and optical through mid-infrared spectroscopy of the classical nova V1186 Sco.This slowly developing nova had a complex light curve with multiple secondary peaks similar to those seen in PW Vul. The time to decline 2 mag, t(2) was 20 days, but the erratic nature of the light curve makes determination of intrinsic properties based on the decline time (e.g., luminosity) problematic, and the often-cited relationship of maximum magnitude versus the rate of decay of the light curve of Della Valle & Livio fails to yield a plausible distance. Spectra covering 0.35-35 pm were obtained in two separate epochs during the first year of outburst. The first set of spectra, taken about 2 months after visible maximum, are typical of a CO-type nova with narrow-line emission from HI, Fe II, OI, and He I. Later data, obtained between 260 and 380 days after maximum, reveal an emerging nebular spectrum. Spitzer spectra show weakening hydrogen recombination emission with the emergence of [Ne II] (12.81 mu m) as the strongest line. Strong emission from [Ne in] (15.56 mu,m) is also detected. Photoionization models with low effective temperature sources and only marginal neon enhancement (Ne similar to 1.3 Neo) are consistent with these IR finestructure neon lines indicating that V1186 Sco did not occur on a ONeMg white dwarf. In contrast, the slow and erratic light-curve evolution, spectral development, and photoionization analysis of the ejecta imply that the outburst occurred on a low-mass CO white dwarf. We note that this is the first time strong [Ne II] lines have been detected so early in the outburst of a CO nova and suggest that the presence of mid-infrared neon lines is not directly indicative of a ONeMg nova event. C1 W Chester Univ, Dept Geol & Astron, W Chester, PA 19383 USA. Univ Minnesota, Sch Phys & Astron, Dept Astron, Minneapolis, MN 55455 USA. Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England. Univ Keele, Astrophys Grp, Keele ST5 5BG, Staffs, England. Univ Cent Lancashire, Dept Phys Astron & Math, Preston PR1 2HE, Lancs, England. Gemini Observ, Hilo, HI 96720 USA. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Inst Nova Studies, Vina Del Mar, Chile. WM Keck Observ, Kamuela, HI 96743 USA. Aerosp Corp, Los Angeles, CA 90009 USA. Univ Manchester, Jodrell Bank, Macclesfield SK11 9DL, Cheshire, England. Univ Pisa, Dipartimento Fis Enrico Fermi, I-56127 Pisa, Italy. Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. Argonne Natl Lab, Argonne, IL 60437 USA. Univ Arizona, Large Binocular Telescope Observ, Argonne, IL 60437 USA. Space Telescope Sci Inst, Baltimore, MD 21218 USA. RP Schwarz, GJ (reprint author), W Chester Univ, Dept Geol & Astron, 750 S Church St, W Chester, PA 19383 USA. EM gschwarz@pha.jhu.edu OI Schwarz, Gregory/0000-0002-0786-7307; Temim, Tea/0000-0001-7380-3144 NR 56 TC 10 Z9 10 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-6256 EI 1538-3881 J9 ASTRON J JI Astron. J. PD AUG PY 2007 VL 134 IS 2 BP 516 EP 526 DI 10.1086/519240 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 197XY UT WOS:000248591800006 ER PT J AU Ashdown, MAJ Baccigalupi, C Balbi, A Bartlett, JG Borrill, J Cantalupo, C de Gasperis, G Gorski, KM Heikkila, V Hivon, E Keihanen, E Kurki-Suonio, H Lawrence, CR Natoli, P Poutanen, T Prunet, S Reinecke, M Stompor, R Wandelt, B AF Ashdown, M. A. J. Baccigalupi, C. Balbi, A. Bartlett, J. G. Borrill, J. Cantalupo, C. de Gasperis, G. Gorski, K. M. Heikkila, V. Hivon, E. Keihanen, E. Kurki-Suonio, H. Lawrence, C. R. Natoli, P. Poutanen, T. Prunet, S. Reinecke, M. Stompor, R. Wandelt, B. CA Planck CTP Working Grp TI Making maps from planck LFI 30 GHz data SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE cosmology : cosmic microwave background; methods : data analysis; techniques : image processing; cosmology : observations ID GALACTIC DUST EMISSION; POLARIZED EMISSION; CMB EXPERIMENTS; LATITUDES; SPHERE AB This paper is one of a series describing the performance and accuracy of map-making codes as assessed by the Planck CTP working group. We compare the performance of multiple codes written by different groups for making polarized maps from Planck-sized, all-sky cosmic microwave background (CMB) data. Three of the codes are based on a destriping algorithm, whereas the other three are implementations of a maximum-likelihood algorithm. Previous papers in the series described simulations at 100 GHz (Poutanen et al. 2006, A & A, 449, 1311) and 217 GHz (Ashdown et al. 2007, A & A, 467, 761). In this paper we make maps (temperature and polarisation) from the simulated one-year observations of four 30 GHz detectors of Planck Low Frequency Instrument (LFI). We used Planck Level S simulation pipeline to produce the observed time-ordered-data streams (TOD). Our previous studies considered polarisation observations for the CMB only. For this paper we increased the realism of the simulations and included polarized galactic foregrounds in our sky model, which is based on the version 0.1 of the PLANCK reference sky. Our simulated TODs comprised dipole, CMB, diffuse galactic emissions, extragalactic radio sources, and detector noise. The strong subpixel signal gradients arising from the foreground signals couple to the output map through the map-making and cause an error (signal error) in the maps. Destriping codes have smaller signal error than the maximum-likelihood codes. We examined a number of schemes to reduce this error. On the other hand, the maximum-likelihood map-making codes can produce maps with lower residual noise than destriping codes. C1 Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England. Inst Astron, Cambridge CB3 0HA, England. Univ Heidelberg, Inst Theoret Astrophys, D-69120 Heidelberg, Germany. SISSA, ISAS, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy. Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy. Univ Paris 07, Observ Paris, CEA, Lab Astroparticule & Cosmol, F-75205 Paris, France. Univ Paris 07, Observ Paris, CNRS, UMR 7164, F-75205 Paris, France. Lawrence Berkeley Lab, Computat Res Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. CALTECH, Pasadena, CA 91125 USA. Univ Warsaw Observ, PL-00478 Warsaw, Poland. Univ Helsinki, Dept Phys Sci, FIN-00014 Helsinki, Finland. Univ Helsinki, Dept Phys Sci, FIN-00014 Helsinki, Finland. Helsinki Inst Phys, FIN-00014 Helsinki, Finland. Inst Astrophys Paris, Paris, France. Max Planck Inst Astrophys, D-85741 Garching, Germany. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Univ Illinois, Dept Astron, Urbana, IL 61801 USA. RP Ashdown, MAJ (reprint author), Cavendish Lab, Astrophys Grp, JJ Thomson Ave, Cambridge CB3 0HE, England. RI de Gasperis, Giancarlo/C-8534-2012; Kurki-Suonio, Hannu/B-8502-2016; OI de Gasperis, Giancarlo/0000-0003-2899-2171; Kurki-Suonio, Hannu/0000-0002-4618-3063; Hivon, Eric/0000-0003-1880-2733; WANDELT, Benjamin/0000-0002-5854-8269 NR 30 TC 20 Z9 20 U1 0 U2 0 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2007 VL 471 IS 1 BP 361 EP 380 DI 10.1051/0004-6361:20077312 PG 20 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 195ED UT WOS:000248394400046 ER PT J AU Garavini, G Folatelli, G Nobili, S Aldering, G Amanullah, R Antilogus, P Astier, P Blanc, G Bronder, T Burns, MS Conley, A Deustua, SE Doi, M Fabbro, S Fadeyev, V Gibbons, R Goldhaber, G Goobar, A Groom, DE Hook, I Howell, DA Kashikawa, N Kim, AG Kowalski, M Kuznetsova, N Lee, BC Lidman, C Mendez, J Morokuma, T Motohara, K Nugent, PE Pain, R Perlmutter, S Quimby, R Raux, J Regnault, N Ruiz-Lapuente, P Sainton, G Schahmaneche, K Smith, E Spadafora, AL Stanishev, V Thomas, RC Walton, NA Wang, L Wood-Vasey, WM Yasuda, N AF Garavini, G. Folatelli, G. Nobili, S. Aldering, G. Amanullah, R. Antilogus, P. Astier, P. Blanc, G. Bronder, T. Burns, M. S. Conley, A. Deustua, S. E. Doi, M. Fabbro, S. Fadeyev, V. Gibbons, R. Goldhaber, G. Goobar, A. Groom, D. E. Hook, I. Howell, D. A. Kashikawa, N. Kim, A. G. Kowalski, M. Kuznetsova, N. Lee, B. C. Lidman, C. Mendez, J. Morokuma, T. Motohara, K. Nugent, P. E. Pain, R. Perlmutter, S. Quimby, R. Raux, J. Regnault, N. Ruiz-Lapuente, P. Sainton, G. Schahmaneche, K. Smith, E. Spadafora, A. L. Stanishev, V. Thomas, R. C. Walton, N. A. Wang, L. Wood-Vasey, W. M. Yasuda, N. CA Supernova Cosmology Project TI Quantitative comparison between type Ia supernova spectra at low and high redshifts: a case study SO ASTRONOMY & ASTROPHYSICS LA English DT Article DE stars : supernovae : general; cosmology : early Universe ID HUBBLE-SPACE-TELESCOPE; SPECTROSCOPIC OBSERVATIONS; OPTICAL-SPECTRA; LEGACY SURVEY; DISCOVERY; SN-1991T; UNIVERSE; OMEGA(LAMBDA); DECELERATION; CONSTRAINTS AB We develop a method to measure the strength of the absorption features in type Ia supernova ( SN Ia) spectra and use it to make a quantitative comparisons between the spectra of type Ia supernovae at low and high redshifts. In this case study, we apply the method to 12 high-redshift ( 0.212 <= z <= 0.912) SNe Ia observed by the Supernova Cosmology Project. Through measurements of the strengths of these features and of the blueshift of the absorption minimum in Ca ii H&K, we show that the spectra of the high-redshift SNe Ia are quantitatively similar to spectra of nearby SNe Ia ( z < 0.15). One supernova in our high redshift sample, SN 2002fd at z = 0.279, is found to have spectral characteristics that are associated with peculiar SN 1991T/SN 1999aa-like supernovae. C1 Univ Stockholm, Albanova Ctr, Dept Phys, S-10691 Stockholm, Sweden. Carnegie Inst Washington Observ, Pasadena, CA 91101 USA. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Paris 06, CNRS, IN2P3, LPNHE, F-75252 Paris 05, France. Univ Paris 07, F-75221 Paris 05, France. Osserv Astron Padova, INAF, I-35122 Padua, Italy. Univ Oxford, Dept Phys, Nucl & Astrophys Lab, Oxford OX1 3RH, England. Colorado Coll, Colorado Springs, CO 80903 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Amer Astron Soc, Washington, DC 20009 USA. Univ Tokyo, Sch Sci, Inst Astron, Mitaka, Tokyo 1810015, Japan. Univ Tecn Lisboa, CENTRA, P-1100 Lisbon, Portugal. Univ Tecn Lisboa, Dep Fis, P-1100 Lisbon, Portugal. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37240 USA. Univ Toronto, Dept Astron & Astrophys, Toronto, ON M5S 3H8, Canada. Natl Astron Observ, Mitaka, Tokyo 1810058, Japan. European So Observ, Santiago 19, Chile. Isaac Newton Grp, Islas Canarias 38780, Spain. Univ Barcelona, Dept Astron, E-08007 Barcelona, Spain. Astron Inst, Cambridge CB3 0HA, England. Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan. RP Garavini, G (reprint author), Univ Stockholm, Albanova Ctr, Dept Phys, S-10691 Stockholm, Sweden. EM gabri@physto.se RI Folatelli, Gaston/A-4484-2011; Stanishev, Vallery/M-8930-2013; MOTOHARA, KENTARO/G-4905-2014; Perlmutter, Saul/I-3505-2015; Yasuda, Naoki/A-4355-2011; Kowalski, Marek/G-5546-2012 OI Stanishev, Vallery/0000-0002-7626-1181; MOTOHARA, KENTARO/0000-0002-0724-9146; Perlmutter, Saul/0000-0002-4436-4661; NR 61 TC 34 Z9 34 U1 0 U2 1 PU EDP SCIENCES S A PI LES ULIS CEDEX A PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE SN 0004-6361 J9 ASTRON ASTROPHYS JI Astron. Astrophys. PD AUG PY 2007 VL 470 IS 2 BP 411 EP 424 DI 10.1051/0004-6361:20065400 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 189HW UT WOS:000247981000006 ER PT J AU Harford, AG Gnedin, NY AF Harford, A. Gayler Gnedin, Nickolay Y. TI Star formation in a cosmological simulation of reionization SO ASTROPHYSICAL JOURNAL LA English DT Article DE cosmology : theory; galaxies : evolution; galaxies : formation; galaxies : high-redshift; galaxies : starburst; galaxies : stellar content; infrared : galaxies; large-scale structure of universe ID ULTRA-DEEP-FIELD; LYMAN-BREAK GALAXIES; ULTRAVIOLET LUMINOSITY DENSITY; PROBE WMAP OBSERVATIONS; HIGH-REDSHIFT GALAXIES; GOODS-SOUTH FIELDS; FORS DEEP; STELLAR MASS; COSMIC REIONIZATION; RADIATIVE-TRANSFER AB We study the luminosity functions of high-redshift galaxies in detailed hydrodynamic simulations of cosmic reionization, which are designed to reproduce the evolution of the Ly alpha forest between z similar to 5 and similar to 6. We find that the luminosity functions and total stellar mass densities are in agreement with observations when plausible assumptions about reddening at z similar to 6 are made. Our simulations support the conclusion that stars alone reionized the universe. C1 Univ Colorado, JILA, Boulder, CO 80309 USA. Natl Inst Stand & Technol, Boulder, CO 80309 USA. Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA. RP Harford, AG (reprint author), Univ Colorado, JILA, Boulder, CO 80309 USA. EM gharford@sif.colorado.edu; gnedin@fnal.gov NR 43 TC 2 Z9 2 U1 0 U2 4 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 2007 VL 664 IS 2 BP 599 EP 607 DI 10.1086/519230 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199CY UT WOS:000248675000001 ER PT J AU Belczynski, K Bulik, T Heger, A Fryer, C AF Belczynski, Krzysztof Bulik, Tomasz Heger, Alexander Fryer, Chris TI The lack of gamma-ray bursts from Population III binaries SO ASTROPHYSICAL JOURNAL LA English DT Article DE binaries : general; gamma rays : bursts; stars : formation ID INITIAL MASS FUNCTION; BLACK-HOLES; STAR-FORMATION; 1ST STARS; REDSHIFT DISTRIBUTION; EVOLUTION; UNIVERSE; STELLAR; SUPERNOVAE; ACCRETION AB We study the evolution of first star (Population III) binaries. Under specific conditions, these stars may produce high-redshift gamma-ray bursts (GRBs). We demonstrate that the occurrence rate of GRBs does not depend sensitively on evolutionary parameters in the population synthesis models. We show that the first binaries may form a very small group (less than or similar to 1%) of fast-rotating stars through binary tidal interactions that make GRBs. This finding is contrary to the intuitive notion that the majority of stars in close Population III binaries will be sufficiently spun up by tides to produce a GRB. We find that there are simply not enough fast-rotating stars in Population III binaries to expect them to be detected with Swift. Predicted detection rates, even with very optimistic assumptions for the binary fraction, evolutionary parameters, and GRB detection, are very small: similar to 0.1-0.01 yr(-1). C1 New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA. Nicholas Copernicus Astron Ctr, Warsaw, Poland. Los Alamos Natl Lab, Theoret Astrophys Grp, Los Alamos, NM 87545 USA. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. Los Alamos Natl Lab, Div Comp & Computat Sci, Los Alamos, NM 87545 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. RP Belczynski, K (reprint author), New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA. EM kbelczyn@nmsu.edu; tb@astrouw.edu.pl; aheger@lanl.gov; fryer@lanl.gov NR 69 TC 24 Z9 24 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 AUG 1 PY 2007 VL 664 IS 2 BP 986 EP 999 DI 10.1086/517500 PN 1 PG 14 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199CY UT WOS:000248675000032 ER PT J AU Berger, E Fox, DB Price, PA Nakar, E Gal-Yam, A Holz, DE Schmidt, BP Cucchiara, A Cenko, SB Kulkarni, SR Soderberg, AM Frail, DA Penprase, BE Rau, A Ofek, E Burnell, SJB Cameron, PB Cowie, LL Dopita, MA Hook, I Peterson, BA Podsiadlowski, P Roth, KC Rutledge, RE Sheppard, SS Songaila, A AF Berger, E. Fox, D. B. Price, P. A. Nakar, E. Gal-Yam, A. Holz, D. E. Schmidt, B. P. Cucchiara, A. Cenko, S. B. Kulkarni, S. R. Soderberg, A. M. Frail, D. A. Penprase, B. E. Rau, A. Ofek, E. Burnell, S. J. Bell Cameron, P. B. Cowie, L. L. Dopita, M. A. Hook, I. Peterson, B. A. Podsiadlowski, P. Roth, K. C. Rutledge, R. E. Sheppard, S. S. Songaila, A. TI A new population of high-redshift short-duration gamma-ray bursts SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : bursts ID ULTRA DEEP FIELD; HOST GALAXY; AFTERGLOW; GRB-050709; NORTH; GRB; ENVIRONMENTS; SPECTROSCOPY; PREDICTIONS; PROGENITORS AB The redshift distribution of the short-duration gamma-ray bursts (GRBs) is a crucial, but currently fragmentary, clue to the nature of their progenitors. Her ewe present optical observations of nine short GRBs obtained with Gemini, Magellan, and the Hubble Space Telescope. We detect the afterglows and host galaxies of two short bursts, and host galaxies for two additional bursts with known optical afterglow positions, and five with X-ray positions (less than or similar to 6 '' radius). In eight of the nine cases we find that the most probable host galaxies are faint, R approximate to 23-26.5 mag, and are therefore starkly different from the first few short GRB hosts with R approximate to 17-22 mag and z less than or similar to 0.5. Indeed, we measure spectroscopic redshifts of z approximate to 0.4-1.1 for the four brightest hosts. A comparison to large field galaxy samples, as well as the hosts of long GRBs and previous short GRBs, indicates that the fainter hosts likely reside at z greater than or similar to 1. Our most conservative limit is that at least half of the five hosts without a known redshift reside at z > 0.7 (97% confidence level), suggesting that about 1/3 to 2/3 of all short GRBs originate at higher redshifts than previously determined. This has two important implications: (1) we constrain the acceptable age distributions to a wide lognormal (sigma greater than or similar to 1) with tau(*)similar to 4-8 Gyr, or to a power law, P(tau) proportional to tau(n), with -1 less than or similar to n less than or similar to 0; and ( 2) the inferred isotropic energies, E-gamma,E-iso similar to 10(50)-10(52) ergs, are significantly larger than similar to 10(48)-10(49) ergs for the low-redshift, short GRBs, indicating a large spread in energy release or jet opening angles. Finally, we reiterate the importance of short GRBs as potential gravitational-wave sources and find a conservative detection rate with the advanced Laser Interferometer Gravitational-Wave Observatory (LIGO) of similar to 2-6 yr(-1). C1 Carnegie Inst Washington Observ, Pasadena, CA 91101 USA. Princeton Univ Observ, Princeton, NJ 08544 USA. Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA. Univ Hawaii, Astron Inst, Honolulu, HI 96822 USA. CALTECH, Dept Phys Math & Astron, Pasadena, CA 91125 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA. Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA. RP Berger, E (reprint author), Carnegie Inst Washington Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA. RI Dopita, Michael/P-5413-2014; OI Dopita, Michael/0000-0003-0922-4986; Schmidt, Brian/0000-0001-6589-1287 NR 79 TC 115 Z9 116 U1 0 U2 5 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 2007 VL 664 IS 2 BP 1000 EP 1010 DI 10.1086/518762 PN 1 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199CY UT WOS:000248675000033 ER PT J AU Young, PA Fryer, CL AF Young, Patrick A. Fryer, Chris L. TI Uncertainties in supernova yields. I. One-dimensional explosions SO ASTROPHYSICAL JOURNAL LA English DT Article DE nuclear reactions; nucleosynthesis; abundances; stars : evolution; supernova remnants; supernovae : general ID CORE-COLLAPSE SUPERNOVAE; STELLAR EVOLUTION; MASSIVE STARS; NEUTRINO RADIATION; MODEL CALCULATIONS; WHITE-DWARFS; NUCLEOSYNTHESIS; MECHANISM; HYDRODYNAMICS; SIMULATIONS AB Theoretical nucleosynthetic yields from supernovae are sensitive to both the details of the progenitor star and the explosion calculation. We attempt to comprehensively identify the sources of uncertainties in these yields. In this paper we concentrate on the variations in yields from a single progenitor arising from common 1D methods of approximating a supernova explosion. Subsequent papers will examine 3D effects in the explosion and the progenitor, and trends in mass and composition. For the 1D explosions we find that both elemental and isotopic yields for Si and heavier elements are a sensitive function of explosion energy. Also, piston-driven and thermal bomb-type explosions have different yields for the same explosion energy. Yields derived from 1D explosions are nonunique. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. RP Young, PA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 52 TC 26 Z9 26 U1 0 U2 5 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 2007 VL 664 IS 2 BP 1033 EP 1044 DI 10.1086/518081 PN 1 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199CY UT WOS:000248675000036 ER PT J AU Kiminki, DC Kobulnicky, HA Kinemuchi, K Irwin, JS Fryer, CL Berrington, RC Uzpen, B Monson, AJ Pierce, MJ Woosley, SE AF Kiminki, Daniel C. Kobulnicky, Henry A. Kinemuchi, K. Irwin, Jennifer S. Fryer, Christopher L. Berrington, R. C. Uzpen, B. Monson, Andy J. Pierce, Michael J. Woosley, S. E. TI A radial velocity survey of the Cyg OB2 association SO ASTROPHYSICAL JOURNAL LA English DT Article DE binaries : close; binaries : general; binaries : spectroscopic; stars : early-type; stars : kinematics; surveys; techniques : radial velocities ID CYGNUS OB2 ASSOCIATION; INITIAL MASS FUNCTION; O-TYPE STARS; VI-CYGNI; X-RAY; SPECTRAL CLASSIFICATION; STELLAR EVOLUTION; MILKY-WAY; BINARY; SYSTEMS AB We conducted a radial velocity survey of the Cyg OB2 association over a 6 yr (1999-2005) time interval to search for massive close binaries. During this time we obtained 1139 spectra on 146 OB stars to measure mean systemic radial velocities and radial velocity variations. We spectroscopically identify 73 new OB stars for the first time, the majority of which are likely to be association members. Spectroscopic evidence is also presented for a B3 Iae classification and temperature class variation (B3-B8) on the order of 1 yr for Cyg OB2 No. 12. Calculations of the initial mass function with the current spectroscopic sample yield Gamma = 2.2 +/- 0.1. Of the 120 stars with the most reliable data, 36 are probable and 9 are possible single-lined spectroscopic binaries. We also identify three new and eight candidate double-lined spectroscopic binaries. These data imply a lower limit on the massive binary fraction of 30%-42%. The calculated velocity dispersion for Cyg OB2 is 2.44 +/- 0.07 km s(-1), which is typical of open clusters. No runaway OB stars were found. C1 Univ Wyoming, Dept Phys & Astron, Laramie, WY 82070 USA. Univ Texas, Dept Astron, Austin, TX 78712 USA. Univ Texas, McDonald Observ, Austin, TX 78712 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA. RP Kiminki, DC (reprint author), Univ Wyoming, Dept Phys & Astron, Laramie, WY 82070 USA. NR 74 TC 65 Z9 66 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 2007 VL 664 IS 2 BP 1102 EP 1120 DI 10.1086/513709 PN 1 PG 19 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199CY UT WOS:000248675000043 ER PT J AU Abdo, AA Allen, B Berley, D Casanova, S Chen, C Coyne, DG Dingus, BL Ellsworth, RW Fleysher, L Fleysher, R Gonzalez, MM Goodman, JA Hays, E Hoffman, CM Hopper, B Huntemeyer, PH Kolterman, BE Lansdell, CP Linnemann, JT McEnery, JE Mincer, AI Nemethy, P Noyes, D Ryan, JM Parkinson, PMS Shoup, A Sinnis, G Smith, AJ Sullivan, GW Vasileiou, V Walker, GP Williams, DA Xu, XW Yodh, GB AF Abdo, A. A. Allen, B. Berley, D. Casanova, S. Chen, C. Coyne, D. G. Dingus, B. L. Ellsworth, R. W. Fleysher, L. Fleysher, R. Gonzalez, M. M. Goodman, J. A. Hays, E. Hoffman, C. M. Hopper, B. Huentemeyer, P. H. Kolterman, B. E. Lansdell, C. P. Linnemann, J. T. McEnery, J. E. Mincer, A. I. Nemethy, P. Noyes, D. Ryan, J. M. Parkinson, P. M. Saz Shoup, A. Sinnis, G. Smith, A. J. Sullivan, G. W. Vasileiou, V. Walker, G. P. Williams, D. A. Xu, X. W. Yodh, G. B. TI TeV gamma-ray sources from a survey of the Galactic plane with Milagro SO ASTROPHYSICAL JOURNAL LA English DT Article DE gamma rays : observations ID HEGRA IACT-SYSTEM; SURROUNDING FIELD; POINT SOURCES; CRAB-NEBULA; GEMINGA; PULSAR; DISCOVERY; SEARCH AB A survey of Galactic gamma-ray sources at a median energy of similar to 20 TeV has been performed using the Milagro Gamma-Ray Observatory. Eight candidate sources of TeV emission are detected with pretrial significances > 4.5 sigma in the region of Galactic longitude l is an element of [ 30 degrees, 220 degrees] and latitude b is an element of [-10 degrees, 10 degrees]. Four of these sources, including the Crab Nebula and the recently published MGRO J2019 + 37, are observed with significances > 4.5 sigma after accounting for the trials. All four of these sources are also coincident with EGRET sources. Two of the lower significance sources are coincident with EGRET sources, and one of these sources is Geminga. The other two candidates are in the Cygnus region of the Galaxy. Several of the sources appear to be spatially extended. The fluxes of the sources at 20 TeV range from similar to 25% of the Crab flux to nearly as bright as the Crab. C1 Michigan State Univ, E Lansing, MI 48824 USA. Univ Calif Irvine, Irvine, CA USA. Univ Maryland, College Pk, MD 20742 USA. Los Alamos Natl Lab, Los Alamos, NM USA. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. George Mason Univ, Fairfax, VA 22030 USA. NYU, New York, NY USA. Univ Nacl Autonoma Mexico, Astron Inst, Mexico City 04510, DF, Mexico. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Univ New Hampshire, Durham, NH 03824 USA. Ohio State Univ, Lima, OH 45804 USA. RP Abdo, AA (reprint author), Michigan State Univ, E Lansing, MI 48824 USA. RI McEnery, Julie/D-6612-2012; Hays, Elizabeth/D-3257-2012; Casanova, Sabrina/J-8935-2013; OI Casanova, Sabrina/0000-0002-6144-9122; Dingus, Brenda/0000-0001-8451-7450; Mincer, Allen/0000-0002-6307-1418 NR 28 TC 129 Z9 131 U1 0 U2 7 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 2007 VL 664 IS 2 BP L91 EP L94 DI 10.1086/520717 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DC UT WOS:000248675400008 ER PT J AU Seymour, N Stern, D De Breuck, C Vernet, J Rettura, A Dickinson, M Dey, A Eisenhardt, P Fosbury, R Lacy, M McCarthy, P Miley, G Rocca-Volmerange, B Rottgering, H Stanford, A Teplitz, H van Breugel, W Zirm, A AF Seymour, Nick Stern, Daniel De Breuck, Carlos Vernet, Joel Rettura, Alessandro Dickinson, Mark Dey, Arjun Eisenhardt, Peter Fosbury, Robert Lacy, Mark McCarthy, Pat Miley, George Rocca-Volmerange, Brigitte Roettgering, Huub Stanford, Adam Teplitz, Harry van Breugel, Wil Zirm, Andrew TI The massive hosts of radio galaxies across cosmic time SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES LA English DT Review DE galaxies : active; galaxies : evolution; galaxies : high-redshift ID ACTIVE GALACTIC NUCLEI; SPITZER-SPACE-TELESCOPE; HUBBLE-DEEP-FIELD; K-Z RELATION; SPECTRAL ENERGY-DISTRIBUTIONS; OLD ELLIPTIC GALAXIES; 7C REDSHIFT SURVEY; LY-ALPHA EMITTERS; BLACK-HOLE MASS; LUMINOSITY FUNCTION AB We present the results of a comprehensive Spitzer survey of 69 radio galaxies across 1 < z < 5.2. Using IRAC ( 3.6-8.0 mu m), IRS ( 16 mu m), and MIPS ( 24-160 mu m) imaging, we decompose the rest-frame optical to infrared spectral energy distributions into stellar, AGN, and dust components and determine the contribution of host galaxy stellar emission at rest-frame Hband. Stellar masses derived from rest-frame near-IR data, where AGN and young star contributions are minimized, are significantly more reliable than those derived from rest-frame optical and UV data. We find that the fraction of emitted light at rest-frame H band from stars is > 60% for similar to 75% of the high-redshift radio galaxies. As expected from unified models of AGNs, the stellar fraction of the rest-frame H-band luminosity has no correlation with redshift, radio luminosity, or rest-frame mid-IR( 5 mu m) luminosity. In addition, while the stellar H-band luminosity does not vary with stellar fraction, the total H-band luminosity anticorrelates with the stellar fraction as would be expected if the underlying hosts of these radio galaxies comprise a homogeneous population. The resultant stellar luminosities imply stellar masses of 10(11)-10(11.5): 5 M-circle dot even at the highest redshifts. Powerful radio galaxies tend to lie in a similar region of mid-IR color-color space as unobscured AGNs, despite the stellar contribution to their mid-IR SEDs at shorter wavelengths. The mid-IR luminosities alone classify most HzRGs as LIRGs or ULIRGs with even higher total-IR luminosities. As expected, these exceptionally high mid-IR luminosities are consistent with an obscured, highly accreting AGN. We find a weak correlation of stellar mass with radio luminosity. C1 CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. European So Observ, D-85748 Garching, Germany. Johns Hopkins Univ, Baltimore, MD 21218 USA. Natl Opt Astron Observ, Tucson, AZ 85719 USA. Carnegie Observ, Pasadena, CA 91101 USA. Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands. Inst Astrophys, F-75014 Paris, France. Univ Calif Davis, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA. Univ Calif, Merced, CA 95344 USA. RP Seymour, N (reprint author), CALTECH, Spitzer Sci Ctr, 1200 E Calif Blvd, Pasadena, CA 91125 USA. EM seymour@ipac.caltech.edu OI Fosbury, Robert/0000-0001-9975-8003; Vernet, Joel/0000-0002-8639-8560; Seymour, Nicholas/0000-0003-3506-5536; De Breuck, Carlos/0000-0002-6637-3315 NR 123 TC 154 Z9 154 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 0067-0049 J9 ASTROPHYS J SUPPL S JI Astrophys. J. Suppl. Ser. PD AUG PY 2007 VL 171 IS 2 BP 353 EP 375 DI 10.1086/517887 PG 23 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 199DO UT WOS:000248676600001 ER PT J AU Chen, CH Huang, C Jing, QG Wang, HK Pan, HS Li, L Zhao, J Dai, Y Huang, HY Schipper, L Streets, DG AF Chen, Changhong Huang, Cheng Jing, Qiguo Wang, Haikun Pan, Hansheng Li, Li Zhao, Jing Dai, Yi Huang, Haiying Schipper, Lee Streets, David G. TI On-road emission characteristics of heavy-duty diesel vehicles in Shanghai SO ATMOSPHERIC ENVIRONMENT LA English DT Article DE heavy-duty diesel vehicles; on-road emission testing; SEMTECH-D; Shanghai; traffic congestion AB On-road vehicle tests of nine heavy-duty diesel trucks were conducted using SEMTECH-D, an emissions measuring instrument provided by Sensors, Inc. The total length of roads for the tests was 186 km. Data were obtained for 37,255 effective driving cycles, including 17,216 on arterial roads, 15,444 on residential roads, and 4595 on highways. The impacts of speed and acceleration on fuel consumption and emissions were analyzed. Results show that trucks spend an average of 16.5% of the time in idling mode, 25.5% in acceleration mode, 27.9% in deceleration mode, and only 30.0% at cruise speed. The average emission factors of CO, total hydrocarbons (THC), and NOx for the selected vehicles are (4.96 +/- 2.90), (1.88 +/- 1.03) and (6.54 +/- 1.90) g km(-1), respectively. The vehicle emission rates vary significantly with factors like speed and acceleration. The test results reflect the actual traffic situation and the current emission status of diesel trucks in Shanghai. The measurements show that low-speed conditions with frequent acceleration and deceleration, particularly in congestion conditions, are the main factors that aggravate vehicle emissions and cause high emissions of CO and THC. Alleviating congestion would significantly improve vehicle fuel economy and reduce CO and THC emissions. (C) 2007 Elsevier Ltd. All rights reserved. C1 Shanghai Acad Environm Sci, Shanghai 200233, Peoples R China. E China Technol Univ, Resources & Environm Engn Inst, Shanghai 200237, Peoples R China. Argonne Natl Lab, Argonne, IL 60439 USA. World Resources Inst, EMBARQ, Washington, DC 20002 USA. RP Streets, DG (reprint author), Shanghai Acad Environm Sci, Shanghai 200233, Peoples R China. EM dstreets@anl.gov RI Wang, Haikun/A-3590-2011; OI Wang, Haikun/0000-0002-2565-5543; Streets, David/0000-0002-0223-1350 NR 39 TC 52 Z9 62 U1 2 U2 22 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 1352-2310 J9 ATMOS ENVIRON JI Atmos. Environ. PD AUG PY 2007 VL 41 IS 26 BP 5334 EP 5344 DI 10.1016/j.atmosenv.2007.02.037 PG 11 WC Environmental Sciences; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA 202AC UT WOS:000248872900005 ER PT J AU Christmann, A Steinwart, I AF Christmann, Andreas Steinwart, Ingo TI Consistency and robustness of kernel-based regression in convex risk minimization SO BERNOULLI LA English DT Article DE consistency; convex risk minimization; influence function; nonparametric regression; robustness; sensitivity curve; support vector regression ID SUPPORT VECTOR MACHINES AB We investigate statistical properties for a broad class of modern kernel-based regression (KBR) methods. These kernel methods were developed during the last decade and are inspired by convex risk minimization in infinite-dimensional Hilbert spaces. One leading example is support vector regression. We first describe the relationship between the loss function L of the KBR method and the tail of the response variable. We then establish the L-risk consistency for KBR which gives the mathematical justification for the statement that these methods are able to "learn". Then we consider robustness properties of such kernel methods. In particular, our results allow us to choose the loss function and the kernel to obtain computationally tractable and consistent KBR methods that have bounded influence functions. Furthermore, bounds for the bias and for the sensitivity curve, which is a finite sample version of the influence function, are developed, and the relationship between KBR and classical M estimators is discussed. C1 Vrije Univ Brussels, Dept Math, Brussels, Belgium. Los Alamos Natl Lab, CCS 3, Los Alamos, NM USA. RP Christmann, A (reprint author), Vrije Univ Brussels, Dept Math, Brussels, Belgium. EM Andreas.Christinann@vub.ac.be; ingo@lanl.gov OI Steinwart, Ingo/0000-0002-4436-7109 NR 30 TC 36 Z9 37 U1 1 U2 3 PU INT STATISTICAL INST PI VOORBURG PA 428 PRINSES BEATRIXLAAN, 2270 AZ VOORBURG, NETHERLANDS SN 1350-7265 J9 BERNOULLI JI Bernoulli PD AUG PY 2007 VL 13 IS 3 BP 799 EP 819 DI 10.3150/07-BEJ5102 PG 21 WC Statistics & Probability SC Mathematics GA 207CX UT WOS:000249230300010 ER PT J AU Kenny, PA AF Kenny, P. A. TI Three-dimensional extracellular matrix culture models of EGFR signalling and drug response SO BIOCHEMICAL SOCIETY TRANSACTIONS LA English DT Article DE breast cancer cell line; drug response; epidermal growth factor receptor (EGFR); three-dimensional extracellular matrix culture; tumour necrosis factor alpha (TNF alpha); tumour necrosis factor alpha-converting enzyme (TACE) ID NECROSIS-FACTOR-ALPHA; BREAST EPITHELIAL-CELLS; GROWTH-FACTOR RECEPTOR; CONVERTING-ENZYME; BASEMENT-MEMBRANE; GENE-EXPRESSION; CANCER-CELLS; DIFFERENTIATION; PATHWAYS; INHIBITOR AB Three-dimensional extracellular matrix culture, on substrata such as Matrigel, restores many aspects of the differentiated state to non-malignant cells from a variety of tissues. We have adapted these techniques to study EGFR (epidermal growth factor receptor) signalling and drug response in breast cancer cell lines. EGFR-dependent breast cancer cell lines undergo a striking reversion of the malignant phenotype upon treatment with inhibitors targeting the receptor, or downstream signalling intermediates such as mitogen-activated protein kinase and PI3K (phosphoinositicle 3-kinase). Using this approach, we have recently reported that EGFR signalling in breast cancer can be effectively inhibited by blocking the activity of a key pirotease, TACE [TNF alpha (turnout necrosis factor alpha)-converting enzyme], which regulates the biclavailability of EGFR ligands. These results suggest a new way to target EGFR signalling in tumours of the breast and other epithelial tissues and underline the value of three-dimensional extracellular matrix culture models for exploring cancer-relevant signalling processes ex vivo. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Kenny, PA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, 1 Cyclotron Rd,MS 977-225A, Berkeley, CA 94720 USA. EM pakenny@lbl.gov RI Kenny, Paraic/A-3120-2008 NR 37 TC 19 Z9 20 U1 0 U2 3 PU PORTLAND PRESS LTD PI LONDON PA THIRD FLOOR, EAGLE HOUSE, 16 PROCTER STREET, LONDON WC1V 6 NX, ENGLAND SN 0300-5127 J9 BIOCHEM SOC T JI Biochem. Soc. Trans. PD AUG PY 2007 VL 35 BP 665 EP 668 PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 204OG UT WOS:000249053300006 PM 17635116 ER PT J AU Williams, RS Williams, JS Tainer, JA AF Williams, R. Scott Williams, Jessica S. Tainer, John A. TI Mre11-Rad50-Nbs1 is a keystone complex connecting DNA repair machinery, double-strand break signaling, and the chromatin template SO BIOCHEMISTRY AND CELL BIOLOGY-BIOCHIMIE ET BIOLOGIE CELLULAIRE LA English DT Article; Proceedings Paper CT 28th International West Coast Chromatin Chromosomes Conference CY DEC 14-17, 2006 CL Pacific Grove, CA DE Mre11-Rad50-Nbs1; chromatin; ATM; DNA double-strand break repair; X-ray crystallography ID ADENYLATE KINASE-ACTIVITY; SACCHAROMYCES-CEREVISIAE; HOMOLOGOUS RECOMBINATION; DAMAGE-RESPONSE; MRE11 COMPLEX; IONIZING-RADIATION; ATM ACTIVATION; PROTEIN-KINASE; HISTONE H2AX; CHROMOSOME SEGREGATION AB The Mre1 1-Rad50-Nbs1 (MRN) complex is providing paradigm-shifting results of exceptional biomedical interest. MRN is among the earliest respondents to DNA double-strand breaks (DSBs), and MRN mutations cause the human cancer predisposition diseases Nijmegen breakage syndrome and ataxia telangiectasia-like disorder (ATLD). MRN's 3-protein multidomain composition promotes its central architectural, structural, enzymatic, sensing, and signaling functions in DSB responses. To organize the MRN complex, the Mre 11 exonuclease directly binds Nbs 1, DNA, and Rad50. Rad50, a structural maintenance of chromosome (SMC) related protein, employs its ATP-binding cassette (ABC) ATPase, Zn hook, and coiled coils to bridge DSBs and facilitate DNA end processing by Mre 11. Contributing to MRN regulatory roles, Nbs I harbors N-terminal phosphopeptide interacting FHA and BRCT domains, as well as C-terminal ataxia telangiectasia mutated (ATM) kinase and Mre I I interaction domains. Current emerging structural and biological evidence suggests that MRN has 3 coupled critical roles in DSB sensing, stabilization, signaling, and effector scaffolding: (1) expeditious establishment of protein - nucleic acid tethering scaffolds for the recognition and stabilization of DSBs; (2) initiation of DSB sensing, cell-cycle checkpoint signaling cascades, and establishment of epigenetic marks via the ATM kinase; and (3) functional regulation of chromatin remodeling in the vicinity of a DSB. C1 Scripps Res Inst, Skaggs Inst Chem Biol, La Jolla, CA 92037 USA. Scripps Res Inst, Dept Mol Biol, La Jolla, CA 92037 USA. Lawrence Berkeley Lab, Dept Mol Biol, Div Life Sci, Berkeley, CA 94720 USA. RP Tainer, JA (reprint author), Scripps Res Inst, Skaggs Inst Chem Biol, 10550 N Torrey Pines Rd,MB4, La Jolla, CA 92037 USA. EM jat@scripps.edu RI Williams, Robert/A-6059-2015 FU NCI NIH HHS [CA117638, CA92584] NR 119 TC 217 Z9 228 U1 3 U2 25 PU NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS PI OTTAWA PA BUILDING M 55, OTTAWA, ON K1A 0R6, CANADA SN 0829-8211 J9 BIOCHEM CELL BIOL JI Biochem. Cell Biol. PD AUG PY 2007 VL 85 IS 4 BP 509 EP 520 DI 10.1139/O07-069 PG 12 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 210AK UT WOS:000249428900011 PM 17713585 ER PT J AU Akerstein, A Bernstein, D Arsuaga, J AF Akerstein, A. Bernstein, D. Arsuaga, J. TI An in silico approach to analyzing nuclear FRAP protein recovery curves using an extension of the Gillespie algorithm SO BIOCHEMISTRY AND CELL BIOLOGY-BIOCHIMIE ET BIOLOGIE CELLULAIRE LA English DT Meeting Abstract C1 San Francisco State Univ, Ctr Computat Life Sci, San Francisco, CA 94132 USA. Lawrence Berkeley Lab, Dept Biol, Berkeley, CA USA. Lawrence Berkeley Lab, Dept Math, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS PI OTTAWA PA BUILDING M 55, OTTAWA, ON K1A 0R6, CANADA SN 0829-8211 J9 BIOCHEM CELL BIOL JI Biochem. Cell Biol. PD AUG PY 2007 VL 85 IS 4 BP 521 EP 521 DI 10.1139/O07-903 PG 1 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA 210AK UT WOS:000249428900013 ER PT J AU Sollins, P Swanston, C Kramer, M AF Sollins, Phillip Swanston, Chris Kramer, Marc TI Stabilization and destabilization of soil organic matter - a new focus SO BIOGEOCHEMISTRY LA English DT Editorial Material ID TERRESTRIAL ECOSYSTEMS; ELEVATED CO2; CARBON; MODEL; FOREST; SUBSTANCES; TURNOVER; DYNAMICS; CYCLE; ACIDS C1 Oregon State Univ, Dept Forest Sci, Corvallis, OR 97331 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA USA. USDA, Forest ServicNorthern Res Stn, Houghton, MI 49931 USA. Univ Calif Santa Cruz, Dept Earth & Planetary Sci, Santa Cruz, CA 95064 USA. RP Sollins, P (reprint author), Oregon State Univ, Dept Forest Sci, Corvallis, OR 97331 USA. EM phil.sollins@orst.edu NR 38 TC 33 Z9 35 U1 5 U2 70 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0168-2563 J9 BIOGEOCHEMISTRY JI Biogeochemistry PD AUG PY 2007 VL 85 IS 1 BP 1 EP 7 DI 10.1007/s10533-007-9099-x PG 7 WC Environmental Sciences; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Geology GA 189OV UT WOS:000247999300001 ER PT J AU Kleber, M Sollins, P Sutton, R AF Kleber, M. Sollins, P. Sutton, R. TI A conceptual model of organo-mineral interactions in soils: self-assembly of organic molecular fragments into zonal structures on mineral surfaces SO BIOGEOCHEMISTRY LA English DT Article; Proceedings Paper CT 2nd International Conference on Mechanisms of Soil Organic Matter Stabilization CY OCT, 2005 CL Monterey, CA SP Natl Sci Fdn, USDA NRI, Lawrence Livermore Natl Lab, Kearney Fdn Soil Sci, NASA, Oregon State Univ DE multilayer; adsorption; soil organic matter; nitrogen; protein; amphiphilic; organo-mineral; micelle; humic ID RAY PHOTOELECTRON-SPECTROSCOPY; LOWLAND RICE SOILS; MARINE-SEDIMENTS; HUMIC-ACID; CLAY-MINERALS; AMINO-ACIDS; HYDROPHOBIC COMPOUNDS; MATTER PRESERVATION; COMPOST LEACHATE; HUMUS COATINGS AB In this paper, we propose a structure for organo-mineral associations in soils based on recent insights concerning the molecular structure of soil organic matter (SOM), and on extensive published evidence from empirical studies of organo-mineral interfaces. Our conceptual model assumes that SOM consists of a heterogeneous mixture of compounds that display a range of amphiphilic or surfactant-like properties, and are capable of self-organization in aqueous solution. An extension of this self-organizational behavior in solution, we suggest that SOM sorbs to mineral surfaces in a discrete zonal sequence. In the contact zone, the formation of particularly strong organo-mineral associations appears to be favored by situations where either (i) polar organic functional groups of amphiphiles interact via ligand exchange with singly coordinated mineral hydroxyls, forming stable inner-sphere complexes, or (ii) proteinaceous materials unfold upon adsorption, thus increasing adhesive strength by adding hydrophobic interactions to electrostatic binding. Entropic considerations dictate that exposed hydrophobic portions of amphiphilic molecules adsorbed directly to mineral surfaces be shielded from the polar aqueous phase through association with hydrophobic moieties of other amphiphilic molecules. This process can create a membrane-like bilayer containing a hydrophobic zone, whose components may exchange more easily with the surrounding soil solution than those in the contact zone, but which are still retained with considerable force. Sorbed to the hydrophilic exterior of hemimicellar coatings, or to adsorbed proteins, are organic molecules forming an outer region, or kinetic zone, that is loosely retained by cation bridging, hydrogen bonding, and other interactions. Organic material in the kinetic zone may experience high exchange rates with the surrounding soil solution, leading to short residence times for individual molecular fragments. The thickness of this outer region would depend more on input than on the availability of binding sites, and would largely be controlled by exchange kinetics. Movement of organics into and out of this outer region can thus be viewed as similar to a phase-partitioning process. The zonal concept of organo-mineral interactions presented here offers a new basis for understanding and predicting the retention of organic compounds, including contaminants, in soils and sediments. C1 Div Earth Sci, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Oregon State Univ, Dept Forest Sci, Corvallis, OR 97331 USA. Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA. RP Kleber, M (reprint author), Div Earth Sci, Lawrence Berkeley Lab, One Cyclotron Rd, Berkeley, CA 94720 USA. EM mkleber@lbl.gov NR 115 TC 289 Z9 304 U1 22 U2 282 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0168-2563 J9 BIOGEOCHEMISTRY JI Biogeochemistry PD AUG PY 2007 VL 85 IS 1 BP 9 EP 24 DI 10.1007/s10533-007-9103-5 PG 16 WC Environmental Sciences; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Geology GA 189OV UT WOS:000247999300002 ER PT J AU Crow, SE Swanston, CW Lajtha, K Brooks, JR Keirstead, H AF Crow, Susan E. Swanston, Christopher W. Lajtha, Kate Brooks, J. Renee Keirstead, Heath TI Density fractionation of forest soils: methodological questions and interpretation of incubation results and turnover time in an ecosystem context SO BIOGEOCHEMISTRY LA English DT Article; Proceedings Paper CT 2nd International Conference on Mechanisms of Soil Organic Matter Stabilization CY OCT, 2005 CL Monterey, CA SP Natl Sci Fdn, USDA NRI, Lawrence Livermore Natl Lab, Kearney Fdn Soil Sci, NASA, Oregon State Univ DE density fractionation; heavy fraction; incubation; light fraction; mean residence time; radiocarbon; sodium polytungstate; soil organic matter ID NET NITROGEN MINERALIZATION; ORGANIC-MATTER FRACTIONS; LIGHT-FRACTION; BLACK CARBON; MACROORGANIC MATTER; ENZYMATIC-ACTIVITY; NMR-SPECTROSCOPY; N-MINERALIZATION; GRASSLAND SOILS; AGE CALIBRATION AB Soil organic matter (SOM) is often separated by physical means to simplify a complex matrix into discrete fractions. A frequent approach to isolating two or more fractions is based on differing particle densities and uses a high density liquid such as sodium polytungstate (SPT). Soil density fractions are often interpreted as organic matter pools with different carbon (C) turnover times, ranging from years to decades or centuries, and with different functional roles for C and nutrient dynamics. In this paper, we discuss the development and mechanistic basis of common density-based methods for dividing soil into distinct organic matter fractions. Further, we directly address the potential effects of dispersing soil in a high density salt solution on the recovered fractions and implications for data interpretation. Soil collected from forested sites at H. J. Andrews Experimental Forest, Oregon and Bousson Experimental Forest, Pennsylvania was separated into light and heavy fractions by floatation in a 1.6 g cm(-3) solution of SPT. Mass balance calculations revealed that between 17% and 26% of the original bulk soil C and N content was mobilized and subsequently discarded during density fractionation for both soils. In some cases, the light isotope was preferentially mobilized during density fractionation. During a year-long incubation, mathematically recombined density fractions respired similar to 40% less than the bulk soil at both sites and light fraction (LF) did not always decompose more than the heavy fraction (HF). Residual amounts of tungsten (W) present even in well-rinsed fractions were enough to reduce microbial respiration by 27% compared to the control in a 90-day incubation of O(a) material. However, residual W was nearly eliminated by repeated leaching over the year-long incubation, and is not likely the primary cause of the difference in respiration between summed fractions and bulk soil. Light fraction at Bousson, a deciduous site developed on Alfisols, had a radiocarbon-based mean residence time (MRT) of 2.7 or 89 years, depending on the interpretation of the radiocarbon model, while HF was 317 years. In contrast, both density fractions from H. J. Andrews, a coniferous site developed on andic soils, had approximately the same MRT (117 years and 93 years for LF and HF). At H. J. Andrews the organic matter lost during density separation had a short MRT (19 years) and can account for the difference in respired CO(2) between the summed fractions and the bulk soil. Recognition and consideration of the effects of the density separation procedure on the recovered fractions will help prevent misinterpretation and deepen our understanding of the specific role of the recovered organic matter fractions in the ecological context of the soil studied. C1 Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA. Oregon State Univ, Bot & Plant Pathol Dept, Corvallis, OR 97331 USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. US EPA, W Ecol Div, Corvallis, OR USA. Oregon State Univ, Dept Soil & Crop Sci, Corvallis, OR 97331 USA. RP Crow, SE (reprint author), Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA. EM secrow@purdue.edu OI Brooks, Renee/0000-0002-5008-9774 NR 80 TC 97 Z9 101 U1 6 U2 72 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0168-2563 J9 BIOGEOCHEMISTRY JI Biogeochemistry PD AUG PY 2007 VL 85 IS 1 BP 69 EP 90 DI 10.1007/s10533-007-9100-8 PG 22 WC Environmental Sciences; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Geology GA 189OV UT WOS:000247999300006 ER PT J AU Chandonia, JM AF Chandonia, John-Marc TI StrBioLib: a Java library for development of custom computational structural biology applications SO BIOINFORMATICS LA English DT Article ID PROTEIN SECONDARY STRUCTURE; STRUCTURE PREDICTION; NEURAL-NETWORKS; DATABASE; CLASSIFICATION; ALIGNMENT AB StrBioLib is a library of Java classes useful for developing software for computational structural biology research. StrBioLib contains classes to represent and manipulate protein structures, biopolymer sequences, sets of biopolymer sequences, and alignments between biopolymers based on either sequence or structure. Interfaces are provided to interact with commonly used bioinformatics applications, including (PSI)-BLAST, MODELLER, MUSCLE and Primer3, and tools are provided to read and write many file formats used to represent bioinformatic data. The library includes a general-purpose neural network object with multiple training algorithms, the Hooke and Jeeves non-linear optimization algorithm, and tools for efficient C-style string parsing and formatting. StrBioLib is the basis for the Pred2ary secondary structure prediction program, is used to build the ASTRAL compendium for sequence and structure analysis, and has been extensively tested through use in many smaller projects. Examples and documentation are available at the site below. C1 Lawrence Berkeley Natl Lab, Phy Biosci Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Plant & Microbial Sci, Berkeley, CA 94720 USA. RP Chandonia, JM (reprint author), Lawrence Berkeley Natl Lab, Phy Biosci Div, Berkeley, CA 94720 USA. EM JMChandonia@lbl.gov FU NIGMS NIH HHS [R01-GM073109, R01 GM073109, 1-P50-GM62412, R01-GM39900, P50 GM062412] NR 24 TC 10 Z9 11 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD AUG 1 PY 2007 VL 23 IS 15 BP 2018 EP 2020 DI 10.1093/bioinformatics/btm269 PG 3 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 207JW UT WOS:000249248400020 PM 17537750 ER PT J AU Monroe, ME Tolic, N Jaitly, N Shaw, JL Adkins, JN Smith, RD AF Monroe, Matthew E. Tolic, Nikola Jaitly, Navdeep Shaw, Jason L. Adkins, Joshua N. Smith, Richard D. TI VIPER: an advanced software package to support high-throughput LC-MS peptide identification SO BIOINFORMATICS LA English DT Article ID MASS-SPECTROMETRY; PROTEIN IDENTIFICATION; ACCURATE MASS; PROTEOMICS; DATABASE; SPECTRA; TANDEM AB The accurate mass and time (AMT) tag approach is used for analysis of large scale experiments by combining information generated over multiple datasets and instrument types. The VIPER software package is one of the key components of the data processing pipeline and implements automated algorithms to discover LC-MS features, align and match these LC-MS features to a database of peptides previously identified in LC-MS/MS analyses, and identify and quantify pairs of isotopically labeled peptides. C1 Pacific NW Natl Lab, Richland, WA 99354 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Richland, WA 99354 USA. EM rds@pnl.gov RI Smith, Richard/J-3664-2012; Adkins, Joshua/B-9881-2013 OI Smith, Richard/0000-0002-2381-2349; Adkins, Joshua/0000-0003-0399-0700 FU NCRR NIH HHS [RR018522]; NIAID NIH HHS [Y1-AI-4894-01] NR 10 TC 136 Z9 137 U1 3 U2 7 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 1367-4803 J9 BIOINFORMATICS JI Bioinformatics PD AUG 1 PY 2007 VL 23 IS 15 BP 2021 EP 2023 DI 10.1093/bioinformatics/btm281 PG 3 WC Biochemical Research Methods; Biotechnology & Applied Microbiology; Computer Science, Interdisciplinary Applications; Mathematical & Computational Biology; Statistics & Probability SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology; Computer Science; Mathematical & Computational Biology; Mathematics GA 207JW UT WOS:000249248400021 PM 17545182 ER PT J AU Duguid, KB Montross, MD Radtke, CW Crofcheck, CL Shearer, SA Hoskinson, RL AF Duguid, K. B. Montross, M. D. Radtke, C. W. Crofcheck, C. L. Shearer, S. A. Hoskinson, R. L. TI Screening for sugar and ethanol processing characteristics from anatomical fractions of wheat stover SO BIOMASS & BIOENERGY LA English DT Article DE biomass; cellulase; straw; digestibility; botanical; pretreatment; internodes; nodes; leaves; chaff; triticum aestivum ID BOTANICAL FRACTIONS; SIMULTANEOUS SACCHARIFICATION; RUMEN DEGRADATION; CORN STOVER; STRAW; BIOMASS; PRETREATMENT; DEGRADABILITY; FERMENTATION; COMPONENTS AB Due to concerns with stover collection systems, soil sustainability, and processing costs to produce ethanol, there are opportunities to investigate the optimal plant fractions to collect. Wheat stover fractions were separated by hand and analyzed for glucan, xylan, acid-soluble lignin, acid-insoluble lignin, and ash composition. Internodes had the highest glucan content (38.2% zero percent moisture basis) and the other fractions varied between 29.9% and 33.4%. The stover fractions were pretreated with either 0%, 0.4%. or 0.8% NaOH for 2h at room temperature, washed, autoclaved, and saccharified. In addition, acid pretreated samples underwent simultaneous saccharification and fermentation (SSE) to ethanol. In general, the acid and alkaline pretreatments produced similar trends with leaves requiring very little pretreatment to achieve high conversion rates (greater than 80%). Chaff responded very well to pretreatment and high conversion efficiencies resulted when pretreated under alkaline or acidic conditions. Nodes and internodes were more recalcitrant than the other anatomical fractions. Pretreatment with 0.8% sulfuric acid (0.24g sulfuric acid/g biomass) did not result in a significantly hi-her conversion of glucan to ethanol as the native material. Pretreatment with 0.8% NaOH (0.06 g NaOH/g biomass) at room temperature for 2h resulted in high conversion efficiencies for all plant fractions, greater than 73% of the available glucan. These differences in pretreatment susceptibilities suggest that a biomass collection system that removes specific portions of wheat stover could result in significant differences in ethanol production costs. (c) 2007 Elsevier Ltd. All rights reserved. C1 Univ Kentucky, Dept Biosyst & Agr Engn, Lexington, KY 40546 USA. Idaho Natl Lab, Biotechnol Grp, Idaho Falls, ID 83415 USA. RP Montross, MD (reprint author), Univ Kentucky, Dept Biosyst & Agr Engn, 128 CE Barnhart Bldg, Lexington, KY 40546 USA. EM montross@bae.uky.edu RI Shearer, Scott/C-8055-2012 NR 29 TC 13 Z9 13 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0961-9534 J9 BIOMASS BIOENERG JI Biomass Bioenerg. PD AUG PY 2007 VL 31 IS 8 BP 585 EP 592 DI 10.1016/j.biombioe.2007.03.002 PG 8 WC Agricultural Engineering; Biotechnology & Applied Microbiology; Energy & Fuels SC Agriculture; Biotechnology & Applied Microbiology; Energy & Fuels GA 199QX UT WOS:000248711400007 ER PT J AU Varma, S Rempe, SB AF Varma, Sameer Rempe, Susan B. TI Tuning ion coordination architectures to enable selective partitioning SO BIOPHYSICAL JOURNAL LA English DT Article ID INITIO MOLECULAR-DYNAMICS; QUASI-CHEMICAL THEORY; POTASSIUM CHANNELS; FREE-ENERGY; K+ CHANNEL; SIMULATIONS; HYDRATION; WATER; KCSA; NA+ AB K+ ions seemingly permeate K-channels rapidly because channel binding sites mimic coordination of K+ ions in water. Highly selective ion discrimination should occur when binding sites form rigid cavities that match K+, but not the smaller Na+, ion size or when binding sites are composed of specific chemical groups. Although conceptually attractive, these views cannot account for critical observations: 1), K+ hydration structures differ markedly from channel binding sites; 2), channel thermal fluctuations can obscure sub-angstrom ngstrom differences in ion sizes; and 3), chemically identical binding sites can exhibit diverse ion selectivities. Our quantum mechanical studies lead to a novel paradigm that reconciles these observations. We. nd that K- channels utilize a "phase- activated'' mechanism where the local environment around the binding sites is tuned to sustain high coordination numbers (>6) around K+ ions, which otherwise are rarely observed in liquid water. When combined with the field strength of carbonyl ligands, such high coordinations create the electrical scenario necessary for rapid and selective K+ partitioning. Specific perturbations to the local binding site environment with respect to strongly selective K- channels result in altered K+/ Na+ selectivities. C1 Sandia Natl Labs, Computat Biosci Dept, Albuquerque, NM 87185 USA. RP Rempe, SB (reprint author), MS 0895,POB 5800, Albuquerque, NM 87185 USA. EM slrempe@sandia.gov RI Rempe, Susan/H-1979-2011 FU NEI NIH HHS [2-PN2-EY016570B, PN2 EY016570] NR 30 TC 110 Z9 111 U1 5 U2 19 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD AUG PY 2007 VL 93 IS 4 BP 1093 EP 1099 DI 10.1529/biophysj.107.107482 PG 7 WC Biophysics SC Biophysics GA 192NM UT WOS:000248208800004 PM 17513348 ER PT J AU Shuai, JW Pearson, JE Foskett, JK Mak, DOD Parker, I AF Shuai, Jianwei Pearson, John E. Foskett, J. Kevin Mak, Don-On Daniel Parker, Ian TI A kinetic model of single and clustered IP3 receptors in the absence of Ca2+ feedback SO BIOPHYSICAL JOURNAL LA English DT Article ID INOSITOL TRISPHOSPHATE RECEPTOR; XENOPUS-OOCYTES; 1,4,5-TRISPHOSPHATE RECEPTORS; SPATIAL-DISTRIBUTION; CALCIUM PUFFS; CHANNEL; RELEASE; ACTIVATION; OSCILLATIONS; INHIBITION AB Ca2+ liberation through inositol 1,4,5- trisphosphate receptor (IP3R) channels generates complex patterns of spatiotemporal cellularCa(2+) signals owing to the biphasic modulation of channel gating by Ca2+ itself. These processes have been extensively studied in Xenopus oocytes, where imaging studies have revealed local Ca2+ signals ("puffs'') arising from clusters of IP3R, and patch-clamp studies on isolated oocyte nuclei have yielded extensive data on IP3R gating kinetics. To bridge these two levels of experimental data, we developed an IP3R model and applied stochastic simulation and transition matrix theory to predict the behavior of individual and clustered IP(3)Rchannels. The channel model consists of four identical, independent subunits, each of which has an IP3- binding site together with one activating and one inactivating Ca2+- binding site. The channel opens when at least three subunits undergo a conformational change to an "active'' state after binding IP3 and Ca2+. The model successfully reproduces patch- clamp data; including the dependence of open probability, mean open duration, and mean closed duration on [IP3] and [Ca2+]. Notably, the biexponential distribution of open- time duration and the dependence of mean open time on [Ca2+] are explained by populations of openings involving either three or four active subunits. As a. rst step toward applying the single IP3R model to describe cellular responses, we then simulated measurements of puff latency after step increases of [IP3]. Assuming that stochastic opening of a single IP3R at basal cytosolic [Ca2+] and any given [IP3] has a high probability of rapidly triggering neighboring channels by calcium- induced calcium release to evoke a puff, optimal correspondence with experimental data of puff latencies after photorelease of IP3 was obtained when the cluster contained a total of 40 - 70 IP(3)Rs. C1 Univ Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697 USA. Los Alamos Natl Lab, Los Alamos, NM USA. Univ Penn, Sch Med, Dept Physiol, Philadelphia, PA 19104 USA. RP Shuai, JW (reprint author), Univ Calif Irvine, Dept Neurobiol & Behav, Irvine, CA 92697 USA. EM shuaij@uci.edu RI Shuai, Jianwei/G-3371-2010; OI Foskett, J. Kevin/0000-0002-8854-0268 FU NIGMS NIH HHS [GM48071, GM 65830, R01 GM048071, R01 GM065830, R37 GM048071] NR 31 TC 54 Z9 56 U1 1 U2 7 PU BIOPHYSICAL SOCIETY PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 USA SN 0006-3495 J9 BIOPHYS J JI Biophys. J. PD AUG PY 2007 VL 93 IS 4 BP 1151 EP 1162 DI 10.1529/biophysj.107.108795 PG 12 WC Biophysics SC Biophysics GA 192NM UT WOS:000248208800009 PM 17526578 ER PT J AU Liebelt, EL Balk, SJ Faber, W Fisher, JW Hughes, CL Lanzkron, SM Lewis, KM Marchetti, F Mehendale, HM Rogers, JM Shad, AT Skalko, RG Stanek, EJ AF Liebelt, Erica L. Balk, Sophie J. Faber, Willem Fisher, Jeffrey W. Hughes, Claude L. Lanzkron, Sophie M. Lewis, Kerry M. Marchetti, Francesco Mehendale, Harihara M. Rogers, John M. Shad, Aziza T. Skalko, Richard G. Stanek, Edward J. TI NTP-CERHR expert panel report on the reproductive and developmental toxicity of hydroxyurea SO BIRTH DEFECTS RESEARCH PART B-DEVELOPMENTAL AND REPRODUCTIVE TOXICOLOGY LA English DT Review ID SICKLE-CELL-DISEASE; CHRONIC MYELOID-LEUKEMIA; EMBRYONIC SPINAL-CORD; GESTATIONAL TROPHOBLASTIC TUMORS; THALASSEMIA-INTERMEDIA PATIENTS; SPERM CHROMATIN STRUCTURE; VITRO EMBRYOTOXICITY TEST; NEURAL-TUBE DEFECTS; STAGE MOUSE EMBRYOS; DNA-SYNTHESIS C1 Univ Alabama, Birmingham, AL USA. Albert Einstein Coll Med, Bronx, NY 10467 USA. LLC, Willem Faber Toxicol Consulting, Victor, NY USA. Univ Georgia, Athens, GA 30602 USA. RTI Int, Res Triangle Pk, NC USA. Johns Hopkins Univ, Baltimore, MD USA. Howard Univ, Washington, DC 20059 USA. Lawrence Berkeley Natl Lab, Berkeley, CA USA. Univ Louisiana, Monroe, LA USA. US EPA, Res Triangle Pk, NC 27711 USA. Georgetown Univ, Washington, DC USA. E Tennessee State Univ, Johnson City, TN 37614 USA. Univ Massachusetts, Amherst, MA 01003 USA. RP Liebelt, EL (reprint author), Care Of Shelby MD, NIEHS EC 32, POB 12233, Res Triangle Pk, NC 27709 USA. OI Marchetti, Francesco/0000-0002-9435-4867 NR 236 TC 17 Z9 17 U1 1 U2 3 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 1542-9733 J9 BIRTH DEFECTS RES B JI Birth Defects Res. Part B-Dev. Reprod. Toxicol. PD AUG PY 2007 VL 80 IS 4 BP 259 EP 366 DI 10.1002/bdrb.20123 PG 108 WC Oncology; Genetics & Heredity; Toxicology SC Oncology; Genetics & Heredity; Toxicology GA 204KV UT WOS:000249043500001 PM 17712860 ER PT J AU Di Niro, R Ziller, F Florian, F Crovella, S Stebel, M Bestagno, M Burrone, O Bradbury, AR Secco, P Marzari, R Sblattero, D AF Di Niro, Roberto Ziller, Federica Florian, Fiorella Crovella, Sergio Stebel, Marco Bestagno, Marco Burrone, Oscar Bradbury, Andrew R. M. Secco, Paola Marzari, Roberto Sblattero, Daniele TI Construction of miniantibodies for the in vivo study of human autoimmune diseases in animal models SO BMC BIOTECHNOLOGY LA English DT Article ID CELIAC-DISEASE; TISSUE TRANSGLUTAMINASE; MONOCLONAL-ANTIBODY; PHAGE DISPLAY; PLASMID DNA; REPERTOIRE CLONING; GENE DELIVERY; FAB FRAGMENTS; IMMUNIZATION; EXPRESSION AB Background: Phage display antibody libraries have been made from the lymphocytes of patients suffering from autoimmune diseases in which the antibodies are known to play a role in the pathogenesis or are important for the diagnosis of the disease. In the case of Celiac Disease, the immune response is directed against the autoantigen tissue transglutaminase. However, despite numerous studies, the role of these antibodies in the pathogenesis of this disease has not been elucidated. Results: We were able to engineer specific anti-transglutaminase antibody fragments in the form called "miniantibody". These are produced by genetic fusion of anti-tTG scFv to Human, Mouse or Rat Fc domains, making them suitable for in vivo expression. The results obtained here indicate that the miniantibody molecule is efficiently secreted, and that the reactivity to the antigen is retained even after fusion to heterologous Fc domains. Further analysis demonstrate that the molecule is secreted as homodimeric, mimicking original antibody structure. Finally, the in vivo expression in mice leads to detectable serum levels with no apparent gross immune response by the host. Conclusion: In this work we demonstrated the usefulness of a method for the in vivo expression of miniantibodies specific to transglutaminase, corresponding to the autoimmune specificity of Celiac Disease. This can be proposed as a general method to study the pathogenic role of autoimmune antibodies in autoimmune diseases. C1 Univ Piemonte Orientale, IRCAD, Dept Med Sci, I-28100 Novara, Italy. Univ Trieste, Dept Biol, I-34127 Trieste, Italy. Univ Trieste, Dept Reprod & Dev Sci, I-34127 Trieste, Italy. Univ Trieste, CSPA, I-34127 Trieste, Italy. Int Ctr Genet Engn & Biotechnol, I-34012 Trieste, Italy. Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Sblattero, D (reprint author), Univ Piemonte Orientale, IRCAD, Dept Med Sci, I-28100 Novara, Italy. EM rdiniro@units.it; federicaler@virgilio.it; florian@units.it; crovella@burlo.trieste.it; stebel@units.it; bestagno@icgeb.org; burrone@icgeb.org; amb@lanl.gov; psecco@med.unipmn.it; marzari@units.it; daniele.sblattero@med.unipmn.it OI Bradbury, Andrew/0000-0002-5567-8172 NR 51 TC 24 Z9 24 U1 0 U2 0 PU BIOMED CENTRAL LTD PI LONDON PA MIDDLESEX HOUSE, 34-42 CLEVELAND ST, LONDON W1T 4LB, ENGLAND SN 1472-6750 J9 BMC BIOTECHNOL JI BMC Biotechnol. PD AUG 1 PY 2007 VL 7 AR 46 DI 10.1186/1472-6750-7-46 PG 10 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA 209IN UT WOS:000249382300001 PM 17678525 ER PT J AU Wang, WG Davis, KJ Yi, CX Patton, EG Butler, MP Ricciuto, DM Bakwin, PS AF Wang, Weiguo Davis, Kenneth J. Yi, Chuixiang Patton, Edward G. Butler, Martha P. Ricciuto, Daniel M. Bakwin, Peter S. TI A note on the top-down and bottom-up gradient functions over a forested site SO BOUNDARY-LAYER METEOROLOGY LA English DT Article DE bottom-up diffusion; convective boundary layer; gradient functions; observations; top-down diffusion ID CONVECTIVE BOUNDARY-LAYER; CARBON-DIOXIDE; TALL TOWER; DIFFUSION; TRANSPORT; SCALAR AB The dimensionless bottom-up and top-down gradient functions in the convective boundary layer (CBL) are evaluated utilizing long-term well-calibrated carbon dioxide mixing ratio and flux measurements from multiple levels of a 447-m tall tower over a forested area in northern Wisconsin, USA. The estimated bottom-up and top-down functions are qualitatively consistent with those from large-eddy simulation (LES) results and theoretical expectations. Newly fitted gradient functions are proposed based on observations for this forested site. The integrated bottom-up function over the lowest 4% of the CBL depth estimated from the tower data is about five times larger than that from LES results for a 'with-canopy' case, and is smaller than that from LES results for a 'no-canopy' case by a factor of 0.7. We discuss the uncertainty in the evaluated gradient functions due to stability, wind direction, and uncertainty in the entrainment flux and show that while all of these have a significant impact on the gradient functions, none can explain the differences between the modelled and observed functions. The effects of canopy features and atmospheric stability may need to be considered in the gradient function relations. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA. Univ Colorado, Dept Ecol, Boulder, CO 80309 USA. Natl Ctr Atmospher Res, Mesoscale & Microscale Meeorol Div, Boulder, CO 80307 USA. NOAA, Climate Monitoring & Diagnost Lab, R CMDL1, Boulder, CO 80305 USA. RP Wang, WG (reprint author), Pacific NW Natl Lab, K9-30, Richland, WA 99352 USA. EM wang@met.psu.edu RI Patton, Edward/K-3607-2012; Wang, Weiguo/B-4948-2009; Yi, Chuixiang/A-1388-2013; Ricciuto, Daniel/I-3659-2016; OI Ricciuto, Daniel/0000-0002-3668-3021; Patton, Edward/0000-0001-5431-9541 NR 16 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0006-8314 J9 BOUND-LAY METEOROL JI Bound.-Layer Meteor. PD AUG PY 2007 VL 124 IS 2 BP 305 EP 314 DI 10.1007/s10546-007-9162-0 PG 10 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 189FA UT WOS:000247973600010 ER PT J AU Xu, TF AF Xu, Tengfang TI Characterization of minienvironments in a clean room: Design characteristics and environmental performance SO BUILDING AND ENVIRONMENT LA English DT Article DE minienvironment; clean room; airflow; pressure differential; environmental performance; cleanliness; particle concentration AB A minienvironment is normally used to maintain a level of stringent cleanliness through controlling particle concentrations within a tightened volume of clean spaces. Because minienvironments are expected to locally achieve a higher level of cleanliness than their adjacent clean room, it is important to understand the characteristics of their design and operation and effectiveness in environmental control. This paper presents findings from an in-situ study on a group of minienvironments, with the focus on characterizing and evaluating environmental performance of the minienvironments as part of a large-scale of in-situ investigation into the total performance of the minienvironments operating in a clean room. In particular, this paper summarizes design and operating characteristics and presents measured environmental performance of five minienvironments and the clean room that housed them. The study discovers that pressure differentials as low as under 0.2 Pa can be sufficient for achieving a high level of air cleanliness to meet environmental control expectation and requirements. Comparisons with relevant industry standards show that existing standards or guidelines may have been suggesting thresholds that are higher than necessary at least in some minienvironment applications. The paper suggests potential benefits from identifying and optimizing the required range of pressure differentials, and likely opportunities and challenges in improving the system's total performance through further studies and refining relevant standards. (c) 2006 Elsevier Ltd. All rights reserved. C1 Lawrence Berkeley Natl Lab, Bldg Technol Dept, Berkeley, CA 94720 USA. RP Xu, TF (reprint author), Lawrence Berkeley Natl Lab, Bldg Technol Dept, 1 Cyclotron Rd,Bldg 90R3111, Berkeley, CA 94720 USA. EM ttxu@lbl.gov NR 21 TC 20 Z9 20 U1 0 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-1323 J9 BUILD ENVIRON JI Build. Environ. PD AUG PY 2007 VL 42 IS 8 BP 2993 EP 3000 DI 10.1016/j.buildenv.2006.10.020 PG 8 WC Construction & Building Technology; Engineering, Environmental; Engineering, Civil SC Construction & Building Technology; Engineering GA 164TO UT WOS:000246257500019 ER PT J AU Rong, LB Feng, ZL Perelson, AS AF Rong, Libin Feng, Zhilan Perelson, Alan S. TI Emergence of HIV-1 drug resistance during antiretroviral treatment SO BULLETIN OF MATHEMATICAL BIOLOGY LA English DT Article DE HIV-1; antiretroviral therapy; adherence; drug resistance; mutation; viral kinetics ID HUMAN-IMMUNODEFICIENCY-VIRUS; STRUCTURED TREATMENT INTERRUPTIONS; FOLLICULAR DENDRITIC CELLS; DYNAMICS IN-VIVO; REVERSE-TRANSCRIPTASE; HIV-1-INFECTED PATIENTS; MATHEMATICAL-ANALYSIS; INTRACELLULAR DELAY; ZIDOVUDINE AZT; INFECTED CELL AB Treating HIV-infected patients with a combination of several antiretroviral drugs usually contributes to a substantial decline in viral load and an increase in CD4+ T cells. However, continuing viral replication in the presence of drug therapy can lead to the emergence of drug-resistant virus variants, which subsequently results in incomplete viral suppression and a greater risk of disease progression. In this paper, we use a simple mathematical model to study the mechanism of the emergence of drug resistance during therapy. The model includes two viral strains: wild-type and drug-resistant. The wild-type strain can mutate and become drug-resistant during the process of reverse transcription. The reproductive ratio R-0 for each strain is obtained and stability results of the steady states are given. We show that drug-resistant virus is more likely to arise when, in the presence of antiretroviral treatment, the reproductive ratios of both strains are close. The wild-type virus can be suppressed even when the reproductive ratio of this strain is greater than 1. A pharmacokinetic model including blood and cell compartments is employed to estimate the drug efficacies of both the wild-type and the drug-resistant strains. We investigate how time-varying drug efficacy (due to the drug dosing schedule and suboptimal adherence) affects the antiviral response, particularly the emergence of drug resistance. Simulation results suggest that perfect adherence to regimen protocol will well suppress the viral load of the wild-type strain while drug-resistant variants develop slowly. However, intermediate levels of adherence may result in the dominance of the drug-resistant virus several months after the initiation of therapy. When more doses of drugs are missed, the failure of suppression of the wild-type virus will be observed, accompanied by a relatively slow increase in the drug-resistant viral load. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Purdue Univ, Dept Math, W Lafayette, IN 47907 USA. RP Perelson, AS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM asp@lanl.gov RI Barley, Kamal/F-9579-2011 OI Barley, Kamal/0000-0003-1874-9813 FU NCRR NIH HHS [RR06555]; NIAID NIH HHS [AI28433] NR 86 TC 74 Z9 76 U1 2 U2 8 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0092-8240 J9 B MATH BIOL JI Bull. Math. Biol. PD AUG PY 2007 VL 69 IS 6 BP 2027 EP 2060 DI 10.1007/s11538-007-9203-3 PG 34 WC Biology; Mathematical & Computational Biology SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology GA 198LD UT WOS:000248628700012 PM 17450401 ER PT J AU Gustafson, WI Leung, LR AF Gustafson, William I., Jr. Leung, L. Ruby TI Regional downscaling for air quality assessment - A reasonable proposition? SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article ID WESTERN UNITED-STATES; CLIMATE MODEL SIMULATION; OZONE CONCENTRATIONS; BOUNDARY-LAYER; POLLUTION EPISODES; BRITISH-COLUMBIA; FUTURE CLIMATE; PART I; PRECIPITATION; CIRCULATION AB Dynamical downscaling promises improved finescale meteorological fields, but is the technique providing useful regional climate information for air quality assessment? C1 Pacific NW Natl Lab, Atmospher Sci & Global Change Div, Richland, WA USA. RP Gustafson, WI (reprint author), Pacific NW Natl Lab, PO Box 999,MSIN K9-30, Richland, WA 99352 USA. EM William.Gustafson@pnl.gov RI Gustafson, William/A-7732-2008 OI Gustafson, William/0000-0001-9927-1393 NR 35 TC 22 Z9 22 U1 0 U2 3 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0003-0007 J9 B AM METEOROL SOC JI Bull. Amer. Meteorol. Soc. PD AUG PY 2007 VL 88 IS 8 BP 1215 EP 1227 DI 10.1175/BAMS-88-8-1215 PG 13 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 205LA UT WOS:000249113800015 ER PT J AU Miller, MA Slingo, A AF Miller, Mark. A. Slingo, Anthony TI The arm mobile facility and its first international deployment - Measuring radiative flux divergence in west Africa SO BULLETIN OF THE AMERICAN METEOROLOGICAL SOCIETY LA English DT Article ID WATER-VAPOR RETRIEVALS; ATMOSPHERIC RADIATION; MEASUREMENT PROGRAM; CLOUD PROPERTIES; BOUNDARY-LAYER; SURFACE PERSPECTIVE; RADAR OBSERVATIONS; ABSORPTION; RADIANCE; LIQUID AB The ARM Mobile Facility is a transportable community climate research platform containing sophisticated sensors that are used to study radiation transfer and other atmospheric processes. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Reading, Environm Syst Sci Ctr, Reading, Berks, England. RP Miller, MA (reprint author), Brookhaven Natl Lab, ASD,Bldg 490D, Upton, NY 11973 USA. EM miller@bnl.gov NR 57 TC 57 Z9 58 U1 0 U2 8 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 USA SN 0003-0007 J9 B AM METEOROL SOC JI Bull. Amer. Meteorol. Soc. PD AUG PY 2007 VL 88 IS 8 BP 1229 EP 1244 DI 10.1175/BAMS-88-8-1229 PG 16 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA 205LA UT WOS:000249113800016 ER PT J AU Albrecht, H Cosman, M Ngu-Schwernlein, M Corzett, M Curran, KW Dolan, C Fang, XM DeNardo, SJ DeNardo, GL Balhorn, R AF Albrecht, Huguette Cosman, Monique Ngu-Schwernlein, Maria Corzett, Michele Curran, Kena W. Dolan, Cheryl Fang, Xiangming DeNardo, Sally J. DeNardo, Gerald L. Balhorn, Rod TI Recombinant expression of the beta-subunit of HLA-DR10 for the selection of novel lymphoma targeting molecules SO CANCER BIOTHERAPY AND RADIOPHARMACEUTICALS LA English DT Article DE lymphoma; antibody; HLA-DR; radioisotope; radioimmunotherapy ID MHC PROTEIN HLA-DR1; PEPTIDE-BINDING; ANTIGENIC PEPTIDE; CRYSTAL-STRUCTURE; ESCHERICHIA-COLI; COMPLEX; CHAIN; EPITOPE; LYM-1; PREDICTION AB Selective high-affinity ligands (SHALs) were selected as substitutes for monoclonal antibodies (mAbs) to deliver radioisotopes to malignant tumors. Because a SHAL (5 KD) is considerably smaller in comparison to an antibody (150 KD), a significant therapeutic index (TI) enhancement for radioimmunotherapy (RIT) is anticipated. The antibody-antigen (Ab-Ag) model system chosen for the development of SHALs consists of Lym-1, a MAb with proven selectivity in non-Hodgkin's lymphoma (NHL) patients and its well-characterized Ag, the beta subunit of HLA DR10. Whereas Lym-1 is readily available, the beta subunit of HLA-DR10 is not. Native, heterodimeric (alpha and,beta subunits) HLA-DR10 can be purified from Raji cells, which are known to overexpress this Ag. Inconsistent homogeneity between preparations of HLA-DR10 solubilized in the presence of detergents prompted us to express a recombinant form of the 6 subunit of HLADR10 in Escherichia coli. Negligible production yields (<= 50 mu g/L) were achieved by the expression of the full-length protein in a soluble form. By contrast, yields of 240 mg/L were obtained by expressing only the extracellular domain (ED) of the,beta subunit of HLA-DR10 in an insoluble form (inclusion bodies). The recovery yield of refolded protein was 75%. Circular dichroism (CD) and Lym-1 binding studies indicated that the recombinant ED of the beta subunit of HLA-DR10 was properly folded. Therefore, this recombinant protein can be used as a surrogate for native heterodimeric HLA DR10 for the in vitro selection of SHALs and related targeting molecules. C1 Univ Calif Davis, Med Ctr, Ctr Canc, Sacramento, CA 95816 USA. Lawrence Livermore Natl Lab, Livermore, CA USA. Winston Salem State Univ, Dept Chem, Winston Salem, NC USA. Genway Biotech Inc, San Diego, CA USA. RP Albrecht, H (reprint author), Univ Calif Davis, Med Ctr, Ctr Canc, 1508 Alhambra Blvd,Room 3100, Sacramento, CA 95816 USA. EM huguette.albrecht@ucdmc.ucdavis.edu FU NCI NIH HHS [P01-CA47829] NR 27 TC 2 Z9 2 U1 0 U2 0 PU MARY ANN LIEBERT INC PI NEW ROCHELLE PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA SN 1084-9785 J9 CANCER BIOTHER RADIO JI Cancer Biother. Radiopharm. PD AUG PY 2007 VL 22 IS 4 BP 531 EP 542 DI 10.1089/cbr.2007.375 PG 12 WC Oncology; Medicine, Research & Experimental; Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Research & Experimental Medicine; Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA 208LM UT WOS:000249320800009 PM 17803448 ER PT J AU Siantar, CLH DeNardo, GL Lam, K Yuan, A Daly, T DeNardo, SJ AF Siantar, Christine L. Hartmann DeNardo, Gerald L. Lam, Kit Yuan, Aina Daly, Thomas DeNardo, Sally J. TI Selecting an intervention time for intravascular enzymatic cleavage of peptide linkers to clear radioisotope from normal tissues SO CANCER BIOTHERAPY AND RADIOPHARMACEUTICALS LA English DT Article DE radiation dose; targeted radioisotope therapy; radioimmunotherapy; linkers; antibodies ID ACUTE MYOCARDIAL-INFARCTION; MONOCLONAL-ANTIBODIES; PLASMINOGEN-ACTIVATOR; METABOLIZABLE LINKAGE; RADIOCHEMICAL DESIGN; RADIOIMMUNOTHERAPY; IMMUNOADSORPTION; PHARMACOKINETICS; TENECTEPLASE; LYMPHOMA AB Protease degradable linkers have been proposed to improve the therapeutic index (TI) (i.e., tumor to normal, tissue) of molecular targeted radioisotope therapy by reducing unbound radiotargeting agent in the blood and other normal tissues. If the radioisotope is detached from the circulating targeting agent once the radioisotope level in the tumors has been maximized, the success of this system depends on the ability to anticipate a preferred intervention time that will lead to significantly improved TIs. This paper presents a method to predict preferred intervention times and TIs by using pharmacokinetic tracer studies carried out without intervention. Methods: Pharmacokinetic data for the blood and tumors from tracer doses of In-111-labeled chimeric and mouse monoclonal antibodies in patients and in mice were used as surrogates for corresponding Y-90 radioimmunoconjugates. Data were fit with simple pharmacokinetic functions. A set of formulas was then developed to estimate the improvement in therapeutic index and the preferred intervention time, using simple modeling assumptions. Results: A modeled introduction of enzymatic cleavable linkers resulted in an increase in the tumor-to-blood TI by a factor of 3.2-1.6 for the systems analyzed. As expected, the preferred intervention times varied depending on the pharmacokinetic data, but could be predicted based on a priori knowledge of the actual or anticipated pharmacokinetics in the absence of intervention. Conclusions: These results highlight the potential value of cleavable linkers in substantially increasing the TI, and provide an approach for estimating a preferred intervention time, using actual or predicted pharmacokinetic data obtained without intervention. C1 Lawrence Livermore Natl Lab, Glenn T Seaborg Inst, Livermore, CA 94550 USA. Univ Calif Davis, Sch Med, Dept Radiat Oncol, Davis, CA 95616 USA. Univ Calif Davis, Sch Med, Div Hematol Oncol, Davis, CA 95616 USA. RP Siantar, CLH (reprint author), Lawrence Livermore Natl Lab, Glenn T Seaborg Inst, POB 808, Livermore, CA 94550 USA. EM chs@llnl.gov FU NCI NIH HHS [P01-CA47829] NR 28 TC 1 Z9 1 U1 0 U2 3 PU MARY ANN LIEBERT INC PI NEW ROCHELLE PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA SN 1084-9785 J9 CANCER BIOTHER RADIO JI Cancer Biother. Radiopharm. PD AUG PY 2007 VL 22 IS 4 BP 556 EP 563 DI 10.1089/cbr.2007.0423 PG 8 WC Oncology; Medicine, Research & Experimental; Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Research & Experimental Medicine; Pharmacology & Pharmacy; Radiology, Nuclear Medicine & Medical Imaging GA 208LM UT WOS:000249320800012 PM 17803451 ER PT J AU Cui, Y Vogt, S Olson, N Glass, AG Rohan, TE AF Cui, Yan Vogt, Stefan Olson, Neal Glass, Andrew G. Rohan, Thomas E. TI Levels of zinc, selenium, calcium, and iron in benign breast tissue and risk of subsequent breast cancer SO CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION LA English DT Article ID TOENAIL SELENIUM; DAIRY-PRODUCTS; VITAMIN-D; WOMEN; MICRONUTRIENTS; PREVENTION; COHORT; COPPER; DIET; SUPPLEMENTATION AB Previous studies that have assessed breast cancer in relation to zinc, selenium, calcium, and iron have yielded inconsistent results but have not measured breast tissue levels. In a case-control study involving 252 matched pairs nested in a cohort of 9,315 women with benign breast disease, we investigated these associations by directly measuring elemental levels in breast tissue using X-ray fluorescence spectroscopy. Quintile analyses revealed positive associations of breast cancer, of borderline statistical significance, with zinc [highest versus lowest quintile: odds ratio (OR), 1.37; 95% confidence limit (95% CL), 0.91, 2.05; P-trend = 0.041, iron (highest versus lowest quintile: OR, 1.58; 95% CL, 1.02, 2.44; P-trend = 0.07), and calcium (highest versus lowest quintile: OR, 1.46; 95% CL, 0.98, 2.17; P-trend = 0.14), but little association with selenium (highest versus lowest quintile: OR, 1.10; 95% CL, 0.72, 1.68; P-trend = 0.76). The associations were weakened by mutual adjustment. Furthermore, after stratification by menopausal status, the positive association between iron and breast cancer was confined to postmenopausal women (highest versus lowest quintile: OR, 2.77; 95% CL, 1.25, 6.13; P-trend = 0.008), whereas the associations for zinc, calcium, and selenium did not differ by menopausal stratum. In conclusion, our data raise the possibility that relatively high levels of zinc, iron, and calcium in benign breast tissue may be associated with a modest increase in risk of subsequent breast cancer. C1 Yeshiva Univ Albert Einstein Coll Med, Dept Epidemiol & Populat Hlth, Bronx, NY 10461 USA. Los Angles Cty, Dept Publ Hlth, Off Hlth Assessment & Epidemiol, Los Angeles, CA USA. Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL USA. Kaiser Permanente, Portland, OR USA. RP Rohan, TE (reprint author), Yeshiva Univ Albert Einstein Coll Med, Dept Epidemiol & Populat Hlth, 1300 Morris Pk Ave,Belfer 1301, Bronx, NY 10461 USA. EM rohan@aecom.yu.edu RI Vogt, Stefan/B-9547-2009; Vogt, Stefan/J-7937-2013 OI Vogt, Stefan/0000-0002-8034-5513; Vogt, Stefan/0000-0002-8034-5513 NR 50 TC 69 Z9 69 U1 4 U2 10 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA 615 CHESTNUT ST, 17TH FLOOR, PHILADELPHIA, PA 19106-4404 USA SN 1055-9965 J9 CANCER EPIDEM BIOMAR JI Cancer Epidemiol. Biomarkers Prev. PD AUG PY 2007 VL 16 IS 8 BP 1682 EP 1685 DI 10.1158/1055-9965.EPI-07-0187 PG 4 WC Oncology; Public, Environmental & Occupational Health SC Oncology; Public, Environmental & Occupational Health GA 199SI UT WOS:000248715100026 PM 17684146 ER PT J AU Zhu, HG Ma, Z Overbury, SH Dai, S AF Zhu, Haoguo Ma, Zhen Overbury, Steven H. Dai, Sheng TI Rational design of gold catalysts with enhanced thermal stability: post modification of Au/TiO2 by amorphous SiO2 decoration SO CATALYSIS LETTERS LA English DT Article DE gold nanoparticles; CO oxidation; promotion; sintering; alkoxysilanes; post decoration ID TEMPERATURE CO OXIDATION; SUPPORTED AU CATALYSTS; ATOMIC LAYER DEPOSITION; MESOPOROUS SILICA; SELECTIVE OXIDATION; VAPOR-DEPOSITION; NANOPARTICLES; TIO2; TITANIA; DICHLORODIFLUOROMETHANE AB Au/TiO2 is highly active for CO oxidation, but it often suffers from sintering in high-temperature environments. In this work, we report on a novel design of gold catalysts, in which pre-formed Au/TiO2 catalysts were post decorated by amorphous SiO2 to suppress the agglomeration of gold particles. Even after being aged in O-2-He at 700 degrees C, the SiO2-decorated Au/TiO2 was still active for CO oxidation at ambient temperature. C1 Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Dai, S (reprint author), Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Div Chem Sci, POB 2008, Oak Ridge, TN 37831 USA. EM dais@ornl.gov RI Ma, Zhen/F-1348-2010; Overbury, Steven/C-5108-2016; Dai, Sheng/K-8411-2015 OI Ma, Zhen/0000-0002-2391-4943; Overbury, Steven/0000-0002-5137-3961; Dai, Sheng/0000-0002-8046-3931 NR 63 TC 43 Z9 43 U1 6 U2 44 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 1011-372X EI 1572-879X J9 CATAL LETT JI Catal. Lett. PD AUG PY 2007 VL 116 IS 3-4 BP 128 EP 135 DI 10.1007/s10562-007-9144-3 PG 8 WC Chemistry, Physical SC Chemistry GA 198GR UT WOS:000248615500007 ER PT J AU Garbe, JC Holst, CR Bassett, E Tlsty, T Stampfer, MR AF Garbe, James C. Holst, Charles R. Bassett, Ekaterina Tlsty, Thea Stampfer, Martha R. TI Inactivation of p53 function in cultured human mammary epithelial cells turns the telomere-length dependent senescence barrier from agonescence into crisis SO CELL CYCLE LA English DT Article DE p53; agonescence; crisis; senescence; genomic instability; stasis ID ONCOGENE-INDUCED SENESCENCE; HUMAN-PAPILLOMAVIRUS TYPE-16; HUMAN CELLULAR SENESCENCE; HUMAN FIBROBLASTS; LIFE-SPAN; IN-VIVO; REPLICATIVE SENESCENCE; BREAST-CANCER; P16(INK4A); IMMORTALIZATION AB Cultured human mammary epithelial cells (HMEC) encounter two distinct barriers to indefinite growth. The first barrier, originally termed selection, can be overcome through loss of expression of the cyclin-dependent kinase inhibitor p16(INK4A). The resultant p16(-), p53(+) post-selection HMEC encounter a second barrier, termed agonescence, associated with critically shortened telomeres and widespread chromosomal aberrations. Although some cell death is present at agonescence, the majority of the population retains long - term viability. We now show that abrogation of p53 function in post - selection HMEC inactivates cell cycle checkpoints and changes the mostly viable agonescence barrier into a crisis - like barrier with massive cell death. In contrast, inactivation of p53 does not affect the ability of HMEC to overcome the first barrier. These data indicate that agonescence and crisis represent two different forms of a telomere - length dependent proliferation barrier. Altogether, our data suggest a modified model of HMEC senescence barriers. We propose that the first barrier is Rb-mediated and largely or completely independent of telomere length. This barrier is now being termed stasis, for stress - associated senescence. The second barrier ( agonescence or crisis) results from ongoing telomere erosion leading to critically short telomeres and telomere dysfunction. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Univ Calif San Francisco, UCS Comprehens Canc Ctr, Dept Pathol, San Francisco, CA 94143 USA. RP Stampfer, MR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Bldg 73, Berkeley, CA 94720 USA. EM mrstampfer@lbl.gov NR 71 TC 43 Z9 43 U1 0 U2 1 PU LANDES BIOSCIENCE PI AUSTIN PA 1806 RIO GRANDE ST, AUSTIN, TX 78702 USA SN 1538-4101 J9 CELL CYCLE JI Cell Cycle PD AUG 1 PY 2007 VL 6 IS 15 BP 1927 EP 1936 PG 10 WC Cell Biology SC Cell Biology GA 208LI UT WOS:000249320400017 PM 17671422 ER PT J AU Bielenberg, JR Gladysz, GM Graham, AL AF Bielenberg, J. R. Gladysz, G. M. Graham, A. L. TI A parametric study of axial segregation in granular systems SO CHEMICAL ENGINEERING SCIENCE LA English DT Article DE particle; transport processes; powder technology; mathematical modeling; particle segregation; particle transport ID ROTATING CYLINDER; SIZE SEGREGATION; MEDIA; FLOW AB When a cylindrical container, partially filled with a binary granular mixture of particles that differ in size or density, is rotated around its axis, a spontaneous segregation of the two granular components may occur. In order to better understand this phenomenon, we have carried out an experimental study probing the effect of average particle size and relative size difference between particles on the onset of segregation. The experimental study is followed by a novel scaling analysis which relates the deterministic, convective driving force for particle segregation to the randomizing diffusional driving force present in these systems through the definition of an axial granular Peclet number. Values of this granular Peclet number are shown to successfully correlate with segregation behavior in the present study, as well as in comparable results in the literature. (c) 2006 Published by Elsevier Ltd. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Graham, AL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM graham@lanl.gov NR 19 TC 6 Z9 6 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0009-2509 J9 CHEM ENG SCI JI Chem. Eng. Sci. PD AUG PY 2007 VL 62 IS 16 BP 4177 EP 4181 DI 10.1016/j.ces.2006.04.030 PG 5 WC Engineering, Chemical SC Engineering GA 203FH UT WOS:000248960000002 ER PT J AU Peterson, R Geeting, J Daniel, R AF Peterson, Reid Geeting, John Daniel, Richard TI Estimation of ultrafilter performance based on characterization data SO CHEMICAL ENGINEERING & TECHNOLOGY LA English DT Article DE centrifugation; solids; ultrafiltration; waste ID FILTRATION; MODELS AB Because of limited availability of test data with actual Hanford tank waste samples, a method was developed to estimate expected filtration performance based on physical characterization data for the Hanford Waste Treatment and Immobilization Plant in Richland, Washington. A test with simulated waste was analyzed to demonstrate that filtration of this class of waste is consistent with a concentration polarization model. Subsequently, filtration data from actual waste samples were analyzed to demonstrate that centrifuged solids concentrations provide a reasonable estimate of the limiting concentration for filtration. C1 Battelle Pacific NW Div, Richland, WA 99354 USA. RP Peterson, R (reprint author), Battelle Pacific NW Div, 902 Battelle Blvd, Richland, WA 99354 USA. EM reid.peterson@pnl.gov OI Peterson, Reid/0000-0003-3368-1896 NR 15 TC 7 Z9 7 U1 0 U2 6 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY SN 0930-7516 J9 CHEM ENG TECHNOL JI Chem. Eng. Technol. PD AUG PY 2007 VL 30 IS 8 BP 1050 EP 1054 DI 10.1002/CEAT.200700107 PG 5 WC Engineering, Chemical SC Engineering GA 199QS UT WOS:000248710900011 ER PT J AU Overbeek, R Bartels, D Vonstein, V Meyer, F AF Overbeek, Ross Bartels, Daniela Vonstein, Veronika Meyer, Folker TI Annotation of bacterial and archaeal genomes: Improving accuracy and consistency SO CHEMICAL REVIEWS LA English DT Review ID MICROBIAL GENE IDENTIFICATION; PROTEIN-PROTEIN INTERACTIONS; SELF-TRAINING METHOD; HIDDEN MARKOV MODEL; SUBCELLULAR-LOCALIZATION; ESCHERICHIA-COLI; SWISS-PROT; METABOLIC PATHWAYS; CODING GENES; DNA-SEQUENCE C1 Univ Chicago, Computat Inst, Chicago, IL 60637 USA. Argonne Natl Lab, Argonne, IL 60439 USA. EM folker@mcs.anl.gov OI Meyer, Folker/0000-0003-1112-2284 NR 91 TC 33 Z9 33 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0009-2665 J9 CHEM REV JI Chem. Rev. PD AUG PY 2007 VL 107 IS 8 BP 3431 EP 3447 DI 10.1021/cr068308h PG 17 WC Chemistry, Multidisciplinary SC Chemistry GA 198WE UT WOS:000248657400006 PM 17658903 ER PT J AU Liu, T Belov, ME Jaitly, N Qian, WJ Smith, RD AF Liu, Tao Belov, Mikhail E. Jaitly, Navdeep Qian, Wei-Jun Smith, Richard D. TI Accurate mass measurements in proteomics SO CHEMICAL REVIEWS LA English DT Review ID ION-CYCLOTRON-RESONANCE; ASSISTED-LASER-DESORPTION/IONIZATION; ELECTRON-CAPTURE-DISSOCIATION; COLLISION-INDUCED DISSOCIATION; COMPLEX PROTEIN MIXTURES; MULTIPLY-CHARGED IONS; CAPILLARY LIQUID-CHROMATOGRAPHY; SPECTROMETRY-BASED PROTEOMICS; TIME TAG APPROACH; INFRARED MULTIPHOTON DISSOCIATION C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA. Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99354 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA. EM rds@pnl.gov RI Qian, Weijun/C-6167-2011; Smith, Richard/J-3664-2012; Liu, Tao/A-9020-2013 OI Smith, Richard/0000-0002-2381-2349; Liu, Tao/0000-0001-9529-6550 FU NCRR NIH HHS [P41 RR018522, P41 RR018522-06, RR018522] NR 431 TC 76 Z9 77 U1 4 U2 24 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0009-2665 J9 CHEM REV JI Chem. Rev. PD AUG PY 2007 VL 107 IS 8 BP 3621 EP 3653 DI 10.1021/cr068288j PG 33 WC Chemistry, Multidisciplinary SC Chemistry GA 198WE UT WOS:000248657400015 PM 17649984 ER PT J AU Zhang, CF Wei, HL Wang, J Liu, ZL AF Zhang Chun-Fang Wei He-Lin Wang Jian Liu Zu-Li TI Gold nanobelt reorientation by molecular dynamics simulation SO CHINESE PHYSICS LETTERS LA English DT Article ID SURFACE; RECONSTRUCTION; TRANSITION; AU(100) AB The embedded atom method is used to study the structure stability of gold nanobelt. The Au nanobelts have a rectangular cross-section with 100 orientation along x-, y- and z-axes. Free surfaces are used along the different temperatures and cross-section sizes. Our results show that the structure stability of the Au nanobelts depends on the nanobelt size, initial orientation, boundary conditions and temperature exists for Au nanobelts to transform from initial 100 nanobelt to final 110 nanobelt. The mechanism of the reorientation is the slip and spread of dislocation through the nanobelt under compressive stress caused by tensile surface-stress components. C1 Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Zhang, CF (reprint author), Huazhong Univ Sci & Technol, Dept Phys, Wuhan 430074, Peoples R China. EM hlwei@mail.hust.edu.cn RI Wang, Jian/F-2669-2012 OI Wang, Jian/0000-0001-5130-300X NR 13 TC 1 Z9 1 U1 1 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0256-307X J9 CHINESE PHYS LETT JI Chin. Phys. Lett. PD AUG PY 2007 VL 24 IS 8 BP 2227 EP 2229 PG 3 WC Physics, Multidisciplinary SC Physics GA 198WF UT WOS:000248657500020 ER PT J AU Lewandowski, JLV Zakharov, LE AF Lewandowski, J. L. V. Zakharov, L. E. TI Fully kinetic, electromagnetic particle-in-cell simulations of plasma microturbulence SO COMMUNICATIONS IN COMPUTATIONAL PHYSICS LA English DT Article DE plasma micro-turbulence; particle-in-cell simulation; multigrid solver ID ANOMALOUS TRANSPORT; DRIFT WAVES; TURBULENCE; ALGORITHM; EQUATIONS AB A novel numerical method, based on physical intuition, for particle-in-cell simulations of electromagnetic plasma microturbulence with fully kinetic ion and electron dynamics is presented. The method is based on the observation that, for low-frequency modes of interest [omega/omega(ci) << 1,omega is the typical mode frequency and omega(ci) is the ion cyclotron frequency] the impact of particles that have velocities larger than the resonant velocity, upsilon(r)similar to omega/k(parallel to) (k(parallel to) is the typical parallel wavenumber) is negligibly small (this is especially true for the electrons). Therefore it is natural to analytically segregate the electron response into an adiabatic response and a nonadiabatic response and to numerically resolve only the latter: this approach is termed the splitting scheme. However, the exact separation between adiabatic and nonadiabatic responses implies that a set of coupled, nonlinear elliptic equations has to be solved; in this paper an iterative technique based on the multigrid method is used to resolve the apparent numerical difficulty. It is shown that the splitting scheme allows for clean, noise-free simulations of electromagnetic drift waves and ion temperature gradient (ITG) modes. It is also shown that the advantage of noise-free kinetic simulations translates into better energy conservation properties. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Lewandowski, JLV (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM jlewando@pppl.gov; zakharov@pppl.gov NR 27 TC 1 Z9 1 U1 0 U2 0 PU GLOBAL SCIENCE PRESS PI WANCHAI PA ROOM 3208, CENTRAL PLAZA, 18 HARBOUR RD, WANCHAI, HONG KONG 00000, PEOPLES R CHINA SN 1815-2406 EI 1991-7120 J9 COMMUN COMPUT PHYS JI Commun. Comput. Phys. PD AUG PY 2007 VL 2 IS 4 BP 684 EP 722 PG 39 WC Physics, Mathematical SC Physics GA 194LD UT WOS:000248345000005 ER PT J AU Bokil, VA Buksas, MW AF Bokil, V. A. Buksas, M. W. TI Comparison of finite difference and mixed finite element methods for perfectly matched layer models SO COMMUNICATIONS IN COMPUTATIONAL PHYSICS LA English DT Article DE perfectly matched layers; mixed finite element methods; FDTD; Maxwell's equations. ID ABSORBING BOUNDARY-CONDITIONS; ELECTROMAGNETIC-WAVES; MAXWELLS EQUATIONS; DOMAIN METHOD; ABSORPTION; FDTD; PML; TRUNCATION AB We consider the anisotropic uniaxial formulation of the perfectly matched layer (UPML) model for Maxwell's equations in the time domain. We present and analyze a mixed finite element method for the discretization of the UPML in the time domain to simulate wave propagation on unbounded domains in two dimensions. On rectangles the spatial discretization uses bilinear finite elements for the electric field and the lowest order Raviart-Thomas divergence conforming elements for the magnetic field. We use a centered finite difference method for the time discretization. We compare the finite element technique presented to the finite difference time domain method (FDTD) via a numerical reflection coefficient analysis. We derive the numerical reflection coefficient for the case of a semi-infinite PML layer to show consistency between the numerical and continuous models, and in the case of a finite PML to study the effects of terminating the absorbing layer. Finally, we demonstrate the effectiveness of the mixed finite element scheme for the UPML by a numerical example and provide comparisons with the split field PML discretized by the FDTD method. In conclusion, we observe that the mixed finite element scheme for the UPML model has absorbing properties that are comparable to the FDTD method. C1 Oregon State Univ, Dept Math, Corvallis, OR 97331 USA. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Bokil, VA (reprint author), Oregon State Univ, Dept Math, Corvallis, OR 97331 USA. EM bokilv@math.oregonstate.edu; mwbuksas@lanl.gov NR 27 TC 2 Z9 2 U1 0 U2 4 PU GLOBAL SCIENCE PRESS PI WANCHAI PA ROOM 2303, OFFICER TOWER, CONVENTION PLAZA, 1 HARBOUR ROAD, WANCHAI, HONG KONG 00000, PEOPLES R CHINA SN 1815-2406 J9 COMMUN COMPUT PHYS JI Commun. Comput. Phys. PD AUG PY 2007 VL 2 IS 4 BP 806 EP 826 PG 21 WC Physics, Mathematical SC Physics GA 194LD UT WOS:000248345000011 ER PT J AU Dacles-Mariani, J Rodrigue, G AF Dacles-Mariani, Jennifer Rodrigue, Garry TI Propagation of weakly guided waves in a Kerr nonlinear medium using a perturbation approach SO COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION LA English DT Article DE Kerr effect; Maxwell's equations; Optical fiber; Vector finite element AB The equations are represented in a simplified format with only a few leading terms needed in the expansion. The set of equations are then solved numerically using vector finite element method. To validate our algorithm, we analyzed a two-dimensional rectangular waveguide consisting of a linear core and nonlinear identical cladding. The exact nonlinear solutions for three different modes of propagations, TE0, TE1, and TE2 modes are generated and compared with the computed solutions. Next, we investigate the effect of a more intense monochromatic field on the propagation of a "weak'' optical field in a fully three-dimensional cylindrical waveguide. (C) 2005 Elsevier B. V. All rights reserved. C1 [Dacles-Mariani, Jennifer] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Inst Sci Comp Res, Livermore, CA 95616 USA. RP Dacles-Mariani, J (reprint author), Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. EM daclesmariani1@llnl.gov FU US Department of Energy by the University of California, Lawrence Livermore National Laboratory [W-7405-Eng-48]; US AFOSR [F49620-01-0327] FX This work was performed under the auspices of the US Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48 and under the US AFOSR Contract No. F49620-01-0327. UCRL-JRNL-207513. NR 12 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1007-5704 J9 COMMUN NONLINEAR SCI JI Commun. Nonlinear Sci. Numer. Simul. PD AUG PY 2007 VL 12 IS 5 BP 673 EP 686 DI 10.1016/j.cnsns.2005.06.008 PG 14 WC Mathematics, Applied; Mathematics, Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas; Physics, Mathematical SC Mathematics; Mechanics; Physics GA V22MB UT WOS:000208278200007 ER PT J AU Martineau, RC AF Martineau, Richard C. TI The PCICE-FEM scheme for highly compressible axisymmetric flows SO COMPUTERS & FLUIDS LA English DT Article ID ELEMENT; EULER; FCT AB The recently developed PCICE-FEM scheme (Journal of Computational Physics, vol. 198, 659, 2004) is extended to two-dimensional axisymmetric geometries. The main discretization problem for nodal-based axisymmetric formulations lies in deriving a closed form as the radial coordinates approach zero along the axis of symmetry. This problem is addressed by employing the finite element piecewise linear approximations to both the flow variables and (separately) to the nodal values of the radial coordinates. The resulting formulation is an elegant treatment of the axisymmetric coordinate system with out noticeable loss of spatial accuracy and little additional cost in computational effort. An overview of the PCICE algorithm for the axisymmetric governing equations will be followed by a detailed axisymmetric finite element formulation for the PCICE-FEM scheme. The ability of the PCICE-FEM scheme to accurately and efficiently simulate highly compressible axisymmetric flows is demonstrated. (c) 2007 Elsevier Ltd. All rights reserved. C1 Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Martineau, RC (reprint author), Idaho Natl Lab, POB 1625, Idaho Falls, ID 83415 USA. EM Richard.Martineau@inl.gov NR 19 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0045-7930 J9 COMPUT FLUIDS JI Comput. Fluids PD AUG PY 2007 VL 36 IS 7 BP 1259 EP 1272 DI 10.1016/j.compfluid.2006.10.003 PG 14 WC Computer Science, Interdisciplinary Applications; Mechanics SC Computer Science; Mechanics GA 181GK UT WOS:000247425000009 ER PT J AU Phoenix, VR Korenevsky, AA Ferris, FG Gorby, YA Beveridge, TJ AF Phoenix, Vernon R. Korenevsky, Anton A. Ferris, F. G. Gorby, Y. A. Beveridge, T. J. TI Influence of lipopolysaccharide on the surface proton-binding behavior of Shewanella spp. SO CURRENT MICROBIOLOGY LA English DT Article ID BACTERIAL SURFACES; POLYSACCHARIDE CHAIN; POLYACRYLAMIDE GELS; METAL ADSORPTION; ALGAE BRY; PUTREFACIENS; ACID; REDUCTION; AFFINITY; OXIDE AB This study investigates the potentiometric properties of several strains of Shewanella spp. and determines whether these properties can be correlated with lipopolysaccharide (LPS) type. The LPS of eight Shewanella strains was characterized using silver-stained sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and their potentiometric properties determined using high-resolution acid-base titrations. Titrations showed that total ligand concentrations (L-T ) ranged from 0.903 +/- 0.007 mu mol/mg (S. baltica 63) to 1.387 +/- 0.007 mu mol/mg (S. amazonensis SB2B). Smooth strains (possessing O-side chains) exhibited higher mean L-T values than rough strains (no O-side chain). A Tukey's honestly significantly different (HSD) test revealed, smooth strains exhibited significantly higher L-T values than rough strains in 69% of comparisons. Comparison of individual pK(a) concentrations revealed that smooth LPS strains of Shewanella were relatively enriched in reactive groups at pK(a) 5, suggesting their LPS O-side chains contained detectable carboxyl groups. Combined pKa spectra from all eight Shewanella strains produced a common trend indicating that the way in which the surface proton-buffering capacity changes with pH is similar for the species studied here. C1 Univ Guelph, Coll Biol Sci, Dept Mol & Cellular Biol, Guelph, ON N1G 2W1, Canada. Univ Toronto, Dept Geol, Toronto, ON M5S 3B1, Canada. Univ Glasgow, Dept Geog & Earth Sci, Glasgow G12 8QQ, Lanark, Scotland. Pacific NW Natl Lab, Richland, WA 99352 USA. J Craig Venter Inst, La Jolla, CA 92037 USA. RP Phoenix, VR (reprint author), Univ Guelph, Coll Biol Sci, Dept Mol & Cellular Biol, Guelph, ON N1G 2W1, Canada. EM Vernon.Phoenix@ges.gla.ac.uk RI Phoenix, Vernon/J-8871-2014 OI Phoenix, Vernon/0000-0002-8682-5200 NR 28 TC 10 Z9 10 U1 1 U2 10 PU SPRINGER PI NEW YORK PA 233 SPRING STREET, NEW YORK, NY 10013 USA SN 0343-8651 J9 CURR MICROBIOL JI Curr. Microbiol. PD AUG PY 2007 VL 55 IS 2 BP 152 EP 157 DI 10.1007/s00284-007-0077-2 PG 6 WC Microbiology SC Microbiology GA 193UM UT WOS:000248300700012 PM 17570012 ER PT J AU Laissue, JA Blattmann, H Wagner, HP Grotzer, MA Slatkin, DN AF Laissue, J. A. Blattmann, H. Wagner, H. P. Grotzer, M. A. Slatkin, D. N. TI Prospects for microbeam radiation therapy of brain tumours in children to reduce neurological sequelae SO DEVELOPMENTAL MEDICINE AND CHILD NEUROLOGY LA English DT Article ID X-RAY MICROBEAMS; SYNCHROTRON-WIGGLER; RADIOTHERAPY; CHILDHOOD; MEDULLOBLASTOMA; RADIOSURGERY; GLIOSARCOMAS; IRRADIATION; MRT AB Microbeam radiation therapy (MRT), a form of experimental radiosurgery of tumours using multiple parallel, planar, micrometres-wide, synchrotron-generated X-ray beams ('microbeams'), can safely deliver radiation doses to contiguous normal animal tissues that are much higher than the maximum doses tolerated by the same normal tissues of animals or patients from any standard millimetres-wide radiosurgical beam. An array of parallel microbeams, even in doses that cause little damage to radiosensitive developing tissues, for example, the chick chorioallantoic membrane, can inhibit growth or ablate some transplanted malignant tumours in rodents. The cerebella of 100 normal 20 to 38g suckling Sprague-Dawley rat pups and of 13 normal 5 to 12kg weanling Yorkshire piglets were irradiated with an array of parallel, synchrotron-wiggler-generated X-ray microbeams in doses overlapping the MRT-relevant range (about 50-600Gy) using the ID17 wiggler beamline tangential to the 6GeV electron synchrotron ring at the European Synchrotron Radiation Facility in Grenoble, France. Subsequent favourable development of most animals over at least 1 year suggests that MRT might be used to treat children's brain tumours with less risk to the development of the central nervous system than is presently the case when using wider beams. C1 Univ Bern, Inst Pathol, CH-3012 Bern, Switzerland. Univ Kinderklin, Inselspital, Bern, Switzerland. Univ Kinderklin, Zurich, Switzerland. Brookhaven Natl Lab, Dept Med, New York, NY USA. RP Laissue, JA (reprint author), Aarwylweg 7, CH-3074 Muri, Switzerland. EM laissue@pathology.unibe.ch NR 26 TC 63 Z9 63 U1 0 U2 5 PU BLACKWELL PUBLISHING PI OXFORD PA 9600 GARSINGTON RD, OXFORD OX4 2DQ, OXON, ENGLAND SN 0012-1622 J9 DEV MED CHILD NEUROL JI Dev. Med. Child Neurol. PD AUG PY 2007 VL 49 IS 8 BP 577 EP 581 PG 5 WC Clinical Neurology; Pediatrics SC Neurosciences & Neurology; Pediatrics GA 197ZQ UT WOS:000248596500007 PM 17635201 ER PT J AU Maxwell, JL ChaveZ, CA Springer, RW Maskaly, KR Goodin, D AF Maxwell, James L. ChaveZ, Craig A. Springer, Robert W. Maskaly, Karlene R. Goodin, Dan TI Preparation of superhard BxCy fibers by microvortex-flow hyperbaric laser chemical vapor deposition SO DIAMOND AND RELATED MATERIALS LA English DT Article DE carbides; fibres; chemical vapor deposition; superhard materials; vortex; diffractive optics ID CUBIC BORON-NITRIDE; BEAM-ASSISTED DEPOSITION; SILICON-CARBIDE FIBERS; CARBON-FIBERS; HIGH-PRESSURE; THIN-FILMS; DIAMOND; HARD; COATINGS; GROWTH AB A novel class of freestanding BxCy fibers was prepared by hyperbaric-pressure laser chemical vapor deposition. Utilizing mixtures of diborane and helium with hydrocarbons, Such as methane, ethene, and pentane, BxCy-alloy fibers were prepared at axial rates of up to 12.2 mu m/s. Regions of kinetically-limited and transport-limited growth were identified, and the activation energy for deposition from B2H6+C5H20+He mixtures (at relative concentrations of 1:25:10) was found to be 197 +/- 27 kJ/mol, while the rate constant was approximately 1810 mu m/s. Compositions ranged from B0.4C0.6 to B0.03C0.97 depending on the gas mixture and laser powers employed; axial and radial fiber compositions/microstructure were explored using Auger spectroscopy and electron microscopy. Glassy BxCy fibers with Vickers hardnesses of 42-45 GPa were grown at laser powers below 150 mW The growth kinetics of pure boron fibers was also investigated from BCl3 + H-2, BF3 + H-2, and B2H6 + H-2 gas mixtures, producing fine-grained a-boron and large single-crystals of beta-boron. Micro-scale vortices in the gas flow emanating from the reaction zone were observed using particle image velocimetry; such vortices enhance axial fiber growth rates through rapid gas mixing. Arrays of fibers were also grown in-parallel using diffractive optical elements. (c) 2007 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, IAT Div, Los Alamos, NM USA. Gen Atom Co, Inertial Fus Technol Div, San Diego, CA 92138 USA. RP Maxwell, JL (reprint author), MS-J566,DP-01S, Los Alamos, NM 87545 USA. EM jmaxwell@lanl.gov NR 57 TC 5 Z9 5 U1 0 U2 7 PU ELSEVIER SCIENCE SA PI LAUSANNE PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND SN 0925-9635 J9 DIAM RELAT MATER JI Diam. Relat. Mat. PD AUG PY 2007 VL 16 IS 8 BP 1557 EP 1564 DI 10.1016/j.diamond.2006.12.059 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA 186UW UT WOS:000247804900016 ER PT J AU Tubbs, JL Pegg, AE Tainer, JA AF Tubbs, Julie L. Pegg, Anthony E. Tainer, John A. TI DNA binding, nucleotide flipping, and the helix-turn-helix motif in base repair by O-6-alkylguanine-DNA alkyltransferase and its implications for cancer chemotherapy SO DNA REPAIR LA English DT Review DE O-6-alkylguanine-DNA alkyltransferase; AGT; O-6-methylguanine-DNA methyltransferase; MGMT; DNA repair; protein crystal structure ID HUMAN O(6)-ALKYLGUANINE-DNA ALKYLTRANSFERASE; IN-VIVO SELECTION; HUMAN O6-ALKYLGUANINE-DNA ALKYLTRANSFERASE; GLUCOSE-CONJUGATED INHIBITORS; SITE-DIRECTED MUTAGENESIS; ESCHERICHIA-COLI ADA; INDUCED CELL-DEATH; PHASE-II TRIAL; O-6-METHYLGUANINE-DNA METHYLTRANSFERASE; MISMATCH REPAIR AB O-6-Alkylguanine-DNA alkyltransferase (AGT) is a crucial target both for the prevention of cancer and for chemotherapy, since it repairs mutagenic lesions in DNA, and it limits the effectiveness of alkylating chemotherapies. AGT catalyzes the unique, single-step, direct damage reversal repair of O-6-alkylguanines by selectively transferring the O-6-alkyl adduct to an internal cysteine residue. Recent crystal structures of human AGT alone and in complex with substrate DNA reveal a two-domain alpha/beta fold and a bound zinc ion. AGT uses its helix-turn-helix motif to bind substrate DNA via the minor groove. The alkylated guanine is then flipped out from the base stack into the AGT active site for repair by covalent transfer of the alkyl adduct to Cys145. An asparagine hinge (Asn137) couples the helix-turn-helix DNA binding and active site motifs. An arginine finger (Arg128) stabilizes the extrahelical DNA conformation. With this newly improved structural understanding of AGT and its interactions with biologically relevant substrates, we can now begin to unravel the role it plays in preserving genetic integrity and discover how it promotes resistance to anticancer therapies. (c) 2007 Elsevier B.V. All rights reserved. C1 Scripps Res Inst, Skaggs Inst Chem Biol, La Jolla, CA 92037 USA. Dept Mol Biol, La Jolla, CA 92037 USA. Penn State Univ, Coll Med, Milton S Hershey Med Ctr, Dept Cell & Mol Physiol, Hershey, PA 17033 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Mol Biol, Div Life Sci, Berkeley, CA 94720 USA. RP Tainer, JA (reprint author), Scripps Res Inst, Skaggs Inst Chem Biol, 10550 N Torrey Pines Rd,MB4, La Jolla, CA 92037 USA. EM jat@scripps.edu FU NCI NIH HHS [P01 CA092584, P01 CA092584-06, R01 CA097209, R01 CA097209-05, R01CA097209] NR 148 TC 85 Z9 88 U1 0 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1568-7864 J9 DNA REPAIR JI DNA Repair PD AUG 1 PY 2007 VL 6 IS 8 BP 1100 EP 1115 DI 10.1016/j.dnarep.2007.03.011 PG 16 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA 200DU UT WOS:000248744900005 PM 17485252 ER PT J AU Richmond, MC Deng, ZQ Guensch, GR Tritico, H Pearson, WH AF Richmond, Marshall C. Deng, Zhiqun Guensch, Gregory R. Tritico, Hans Pearson, Walter H. TI Mean flow and turbulence characteristics of a full-scale spiral corrugated culvert with implications for fish passage SO ECOLOGICAL ENGINEERING LA English DT Article DE culvert; fish passage; velocity; turbulence ID OPEN-CHANNEL FLOW AB A micro-acoustic Doppler velocimeter (ADV) was used to measure three-dimensional mean velocity and turbulence characteristics in a full-scale culvert with spiral corrugations. The culvert was set up in a test bed constructed to examine juvenile salmon passage success in various culvert types. The test culvert was 12.2 m long and 1.83 m in diameter and set at a 1.14% slope. The corrugations were 2.54 cm deep by 7.62 cm peak to peak with a 5 degrees right-handed pitch. Cross-sectional grids of ADV measurements were taken at discharges of 0.028, 0.043, 0.071, 0.099, 0.113, 0.227, and 0.453 m(3)/s at nine locations. In the uniform flow region, the centerline velocity profiles were consistent with fully rough turbulent flows and the friction factor was independent of Reynolds number and was very close to theoretical results. Secondary flow induced by the spiral corrugations caused asymmetries in the velocity and turbulence distributions creating a reduced velocity zone (RVZ) on the right side of the culvert as seen looking upstream, which small fish could utilize to aid their upstream passage. Velocity and axial components of turbulence in the RVZ were found to be much less than in mid-channel or on the left of the culvert, and the difference became greater at increased flow rates. In addition, cross-stream and vertical velocity components within the RVZ were small relative to the downstream axial component, while lateral and vertical turbulence intensities were comparable to the axial component. Observations from a concurrent fish passage study showed that more juvenile fish migrate through the right side of the culvert within the RVZ. (C) 2007 Elsevier B.V. All rights reserved. C1 Pacific NW Div, Battelle Mem Inst, Richland, WA 99352 USA. Balance Hydrolog Inc, Berkeley, CA 94710 USA. Univ Michigan, Dept Civil Engn, Ann Arbor, MI 48109 USA. Marine Sci Lab, Battelle Mem Inst, Sequim, WA 98382 USA. RP Richmond, MC (reprint author), Pacific NW Div, Battelle Mem Inst, POB 999, Richland, WA 99352 USA. EM marshall.richmond@pnl.gov RI Richmond, Marshall/D-3915-2013; Deng, Daniel/A-9536-2011 OI Richmond, Marshall/0000-0003-0111-1485; Deng, Daniel/0000-0002-8300-8766 NR 19 TC 14 Z9 16 U1 1 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0925-8574 J9 ECOL ENG JI Ecol. Eng. PD AUG 1 PY 2007 VL 30 IS 4 BP 333 EP 340 DI 10.1016/j.ecoleng.2007.04.011 PG 8 WC Ecology; Engineering, Environmental; Environmental Sciences SC Environmental Sciences & Ecology; Engineering GA 193XT UT WOS:000248309200005 ER PT J AU Ivnitski, D Atanassov, P Apblett, C AF Ivnitski, Dmitri Atanassov, Plamen Apblett, Christopher TI Direct bioelectrocatalysis of PQQ-dependent glucose dehydrogenase SO ELECTROANALYSIS LA English DT Article DE PQQ-dependent glucose dehydrogenase; carbon nanotubes; direct electron transfer; glucose ID DIRECT ELECTRON-TRANSFER; D-GLUCONATE DEHYDROGENASE; WALLED CARBON NANOTUBES; PYRROLOQUINOLINE QUINONE; ELECTROCHEMICAL BIOSENSORS; ALCOHOL-DEHYDROGENASE; BIOFUEL CELLS; REDOX ENZYMES; OXIDASE; BIOTECHNOLOGY AB The direct bioelectrocatalysis was demonstrated for pyrroloquinoline quinone-dependent glucose dehydrogenase (PQQ-dependent GDH) covalently attached to single-walled carbon nanotubes (SWNTs). The homogeneous ink-like SWNT suspension was used for both creating the SWNT network on the microelectrode carbon surface and for enzyme immobilization. Functionalization of the SWNT surface by forming active ester groups was found to considerably enhance SWNT solubility in water with a range from 0.1 to 1.0 mg/mL. The PQQ-dependent GDH immobilized on the surface of the SWNTs exhibited fast heterogeneous electron transfer with a rate constant of 3.6 s(-1). Moreover, the immobilized PQQ-dependent GDH retained its enzymatic activity for glucose oxidation. A fusion of PQQ-dependent GDH with SWNTs has a great potential for the development of low-cost and reagentless glucose sensors and biofuel cells. C1 Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Ivnitski, D (reprint author), Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. EM ivnitski@unm.edu RI Atanassov, Plamen/G-4616-2011 NR 49 TC 51 Z9 51 U1 1 U2 24 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 1040-0397 J9 ELECTROANAL JI Electroanalysis PD AUG PY 2007 VL 19 IS 15 BP 1562 EP 1568 DI 10.1002/elan.200703899 PG 7 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA 199DT UT WOS:000248677100002 ER PT J AU Chen, J Lin, YH Chen, G AF Chen, Jiang Lin, Yuehe Chen, Gang TI Fabrication of poly(methyl methacrylate) microfluidic chips by redox-initiated polymerization SO ELECTROPHORESIS LA English DT Article DE CE; microchip; miniaturization; poly(methyl methacrylate); redox-initiated polymerization ID TOTAL ANALYSIS SYSTEMS; MICROCHIP CAPILLARY-ELECTROPHORESIS; SITU SURFACE POLYMERIZATION; CONDUCTIVITY DETECTION; DETECTOR; DEVICES; DNA AB in this report, a method based on the redox-initiated polymerization of methyl methacrylate (MMA) has been developed for the rapid fabrication of poly(methyl methacrylate) (PMMA) microfluidic chips. MMA containing 2-2'-azo-bis-isobutyronitrile was allowed to pre-polymerize in a water bath to form a viscous prepolymer solution that was subsequently mixed with MMA containing a redox-initiation couple of benzoyl peroxide/ N, N-dimethylaniline. The dense molding solution was sandwiched between a silicon template and a piece of 1-mm-thick PMMA plate. The polymerization could complete within 50 min under ambient temperature. The images of raised microfluidic structures on the silicon template were precisely replicated into the synthesized PMMA substrate during the redox-initiated polymerization of the molding solution. The chips were subsequently assembled by the thermal bonding of the channel plates and the covers. The new fabrication approach obviates the need for special equipment and significantly simplifies the process of fabricating PMMA microdevices. The attractive performance of the novel PMMA microchips has been demonstrated in connection with contactless conductivity detection for the separation and detection of ionic species. C1 Fudan Univ, Sch Pharm, Shanghai 200433, Peoples R China. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Chen, G (reprint author), Fudan Univ, Sch Pharm, 220 Handan Rd, Shanghai 200433, Peoples R China. EM gangehen@fudan.edu.cn RI Lin, Yuehe/D-9762-2011 OI Lin, Yuehe/0000-0003-3791-7587 NR 25 TC 17 Z9 17 U1 1 U2 9 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0173-0835 J9 ELECTROPHORESIS JI Electrophoresis PD AUG PY 2007 VL 28 IS 16 BP 2897 EP 2903 DI 10.1002/elps.200700071 PG 7 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA 207YH UT WOS:000249286500015 PM 17702066 ER PT J AU Alia-Klein, N Goldstein, RZ Tornasi, D Zhang, L Fagin-Jones, S Telang, F Wang, GJ Fowler, JS Volkow, ND AF Alia-Klein, Nelly Goldstein, Rita Z. Tornasi, Dardo Zhang, Lei Fagin-Jones, Stephanie Telang, Frank Wang, Gene-Jack Fowler, Joanna S. Volkow, Nora D. TI What is in a word? No versus Yes differentially engage the lateral orbitofrontal cortex SO EMOTION LA English DT Article DE fMRI; inferior frontal gyrus; OFC; valence; emotional control; anger; "yes,"; "no" ID FUNCTIONAL NEUROANATOMY; CINGULATE CORTEX; SELF-REGULATION; WORKING-MEMORY; EMOTION; ASYMMETRY; PERCEPTION; ACTIVATION; SPEECH; REWARD AB The words "No" and "Yes" are involved in conditioning to prohibit or encourage behavior, respectively. The authors, therefore. hypothesized that these words would be attributed to endogenous valence, activating neuronal circuits involved with valence and emotional control. Functional MRI (fMRI) at 4 Tesla was used to record regional brain activity while participants were exposed to emphatic vocalizations of the words. Results showed that No and Yes were associated with opposite brain-behavior responses; while No was negatively valenced, produced slower response times, and evoked a negative signal in the right lateral orbitofrontal cortex (OFC), Yes was positively valenced, produced faster response times, and evoked a positive signal in a contiguous region of the OFC. Attribution of negative valence to No and trait anger control were associated with increased responsivity of the OFC to No. Inasmuch as sensitivity to the prohibitive command No develops during childhood through interaction with primary caregivers as the first social objects, our findings may implicate the lateral OFC in the neurobiology of emotion regulation and subsequent social development. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Columbia Univ Teachers Coll, New York, NY 10027 USA. NIDA, Bethesda, MD 20892 USA. RP Alia-Klein, N (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA. EM nellyklein@bnl.gov RI Tomasi, Dardo/J-2127-2015 FU NCRR NIH HHS [5M01 RR 10710, M01 RR010710]; NIDA NIH HHS [T32 DA007316, L30 DA018402-01, L30 DA018402-02, T32 DA 07316-01A1] NR 59 TC 13 Z9 13 U1 4 U2 5 PU AMER PSYCHOLOGICAL ASSOC/EDUCATIONAL PUBLISHING FOUNDATION PI WASHINGTON PA 750 FIRST ST NE, WASHINGTON, DC 20002-4242 USA SN 1528-3542 J9 EMOTION JI Emotion PD AUG PY 2007 VL 7 IS 3 BP 649 EP 659 DI 10.1037/1528-3542.7.3.649 PG 11 WC Psychology, Experimental SC Psychology GA 197DC UT WOS:000248532900018 PM 17683220 ER PT J AU Schaiff, WT Knapp, FF Barak, Y Biron-Shental, T Nelson, DM Sadovsky, Y AF Schaiff, W. Timothy Knapp, F. F., Jr. Barak, Yaacov Biron-Shental, Tal Nelson, D. Michael Sadovsky, Yoel TI Ligand-activated peroxisome proliferator activated receptor gamma alters placental morphology and placental fatty acid uptake in mice SO ENDOCRINOLOGY LA English DT Article ID TRIGLYCERIDE TRANSFER PROTEIN; PPAR-GAMMA; GENE-EXPRESSION; IN-VIVO; EMBRYONIC-DEVELOPMENT; INSULIN-RESISTANCE; TRANSPORT PROTEIN; CELLULAR UPTAKE; X-RECEPTOR; MOUSE AB The nuclear receptor peroxisome proliferator activated receptor gamma (PPAR gamma) is essential for murine placental development. We previously showed that activation of PPAR gamma in primary human trophoblasts enhances the uptake of fatty acids and alters the expression of several proteins associated with fatty acid trafficking. In this study we examined the effect of ligand- activated PPAR gamma on placental development and transplacental fatty acid transport in wild- type (wt) and PPAR gamma(+/-) embryos. We found that exposure of pregnant mice to the PPAR gamma agonist rosiglitazone for 8 d ( embryonic d 10.5 - 18.5) reduced the weights of wt, but not PPAR gamma (+/-) placentas and embryos. Exposure to rosiglitazone reduced the thickness of the spongiotrophoblast layer and the surface area of labyrinthine vasculature, and altered expression of proteins implicated in placental development. The expression of fatty acid transport protein 1 ( FATP1), FATP4, adipose differentiation related protein, S3- 12, and myocardial lipid droplet protein was enhanced in placentas of rosiglitazone- treated wt embryos, whereas the expression of FATP- 2, - 3, and - 6 was decreased. Additionally, rosiglitazone treatment was associated with enhanced accumulation of the fatty acid analog 15-( piodophenyl)3-( R, S)- methyl pentadecanoic acid in the placenta, but not in the embryos. These results demonstrate that in vivo activation of PPAR gamma modulates placental morphology and fatty acid accumulation. C1 Washington Univ, Sch Med, Dept Obstet & Gynecol, St Louis, MO 63110 USA. Washington Univ, Sch Med, Dept Cell Biol & Physiol, St Louis, MO 63110 USA. Oak Ridge Natl Lab, Nucl Med Program, Oak Ridge, TN 37831 USA. Jackson Lab, Bar Harbor, ME 04609 USA. RP Sadovsky, Y (reprint author), Washington Univ, Sch Med, Dept Obstet & Gynecol, Campus Box 8064,4566 Scott Ave, St Louis, MO 63110 USA. EM ysadovsky@wustl.edu FU NICHD NIH HHS [R01HD044103]; NIEHS NIH HHS [R01ES11597] NR 60 TC 57 Z9 60 U1 1 U2 5 PU ENDOCRINE SOC PI CHEVY CHASE PA 8401 CONNECTICUT AVE, SUITE 900, CHEVY CHASE, MD 20815-5817 USA SN 0013-7227 J9 ENDOCRINOLOGY JI Endocrinology PD AUG PY 2007 VL 148 IS 8 BP 3625 EP 3634 DI 10.1210/en.2007-0211 PG 10 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA 190UT UT WOS:000248086800012 PM 17463056 ER PT J AU Rau, GH Knauss, KG Langer, WH Caldeira, K AF Rau, Greg H. Knauss, Kevin G. Langer, William H. Caldeira, Ken TI Reducing energy-related CO2 emissions using accelerated weathering of limestone SO ENERGY LA English DT Article DE CO2; power plant; mitigation; capture; sequestration; storage; limestone; ocean ID CARBON-DIOXIDE; ATMOSPHERIC CO2; OCEAN; CALCIFICATION; DISSOLUTION; BICARBONATE; TECHNOLOGY; DISPOSAL; STATE; PH AB The use and impacts of accelerated weathering of limestone (AWL; reaction: CO2 + H2O + CaCO3 -> Ca2+ + 2(HCO3-) is explored as a CO2 capture and sequestration method. It is shown that significant limestone resources are relatively close to a majority of CO2-emitting power plants along the coastal US, a favored siting location for AWL. Waste fines, representing more than 20% of current US crushed limestone production (> 10(9) tonnes/yr), could provide an inexpensive or free source of AWL carbonate. With limestone transportation then as the dominant cost variable, CO2 mitigation costs of $3-$4/tonne appear to be possible in certain locations. Perhaps 10-20% of US point-source CO2 emissions could be mitigated in this fashion. It is experimentally shown that CO2 sequestration rates of 10(-6) to 10(-5) moles/sec per m(2) of limestone surface area are achievable, with reaction densities on the order of 10(-2) tonnes CO2 m(-3) day(-1), highly dependent on limestone particle size, solution turbulence and flow, and CO2 concentration. Modeling shows that AWL would allow carbon storage in the ocean with significantly reduced impacts to seawater pH relative to direct CO2 disposal into the atmosphere or sea. The addition of AWL-derived alkalinity to the ocean may itself be beneficial for marine biota. (c) 2006 Elsevier Ltd. All rights reserved. C1 Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA. Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94550 USA. US Geol Survey, Denver, CO 80225 USA. Carnegie Inst, Dept Global Ecol, Stanford, CA 94305 USA. RP Rau, GH (reprint author), Univ Calif Santa Cruz, Inst Marine Sci, Santa Cruz, CA 95064 USA. EM rau4@llnl.gov RI Caldeira, Ken/E-7914-2011; knauss, kevin/K-2827-2012 NR 37 TC 28 Z9 29 U1 4 U2 14 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0360-5442 J9 ENERGY JI Energy PD AUG PY 2007 VL 32 IS 8 BP 1471 EP 1477 DI 10.1016/j.energy.2006.10.011 PG 7 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA 184SL UT WOS:000247662200018 ER PT J AU Lin, J AF Lin, Jiang TI Energy conservation investments: A comparison between China and the US (vol 35, pg 916, 2007) SO ENERGY POLICY LA English DT Correction C1 Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Lin, J (reprint author), Lawrence Berkeley Lab, MS 90-4000, Berkeley, CA 94720 USA. EM J_lin@lbl.gov NR 1 TC 0 Z9 0 U1 0 U2 2 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD AUG PY 2007 VL 35 IS 8 BP 4402 EP 4402 DI 10.1016/j.enpol.2007.02.026 PG 1 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA 187XG UT WOS:000247881800039 ER PT J AU Felton, JS AF Felton, J. S. TI Is there a human risk from potent mutagens in cooked meat? SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Livermore Natl Lab, Davis, CA USA. Univ Calif Davis, Ctr Canc, Davis, CA 95616 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 522 EP 522 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500003 ER PT J AU Hinz, JM Nham, PB Urbin, SS Jones, IM Thompson, LH AF Hinz, J. M. Nham, P. B. Urbin, S. S. Jones, I. M. Thompson, L. H. TI The Fanconi anemia (FA) pathway limits the severity of mutagenesis. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 526 EP 526 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500011 ER PT J AU Chen, FF AF Chen, F. F. TI Toxicogenomic analysis of nanoparticles. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 4 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 532 EP 532 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500028 ER PT J AU Lucas, D Holder, A Koshland, CP Goth-Goldstein, R AF Lucas, D. Holder, A. Koshland, C. P. Goth-Goldstein, R. TI New fuels, new particles, new risks? SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 LBNL, Berkeley, CA USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 3 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 532 EP 532 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500030 ER PT J AU Henderson, PT Hah, SS Mundt, JM Sumbad, RA Turteltaub, KW AF Henderson, P. T. Hah, S. S. Mundt, J. M. Sumbad, R. A. Turteltaub, K. W. TI Metabolism and incorporation of exogenous 8-oxodG into DNA in cell culture and mice: An alternative promutagenic pathway compared to oxidation of nucleotides and DNA. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 536 EP 536 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500040 ER PT J AU Marchetti, F AF Marchetti, F. TI Effects of second-hand smoke on male germ cells and early embryonic development. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Berkeley Natl Lab, Berkeley, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 539 EP 539 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500047 ER PT J AU Coleman, MA AF Coleman, M. A. TI Model systems and current approaches in biodosimetry. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Livermore Natl Lab, Livermore, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 542 EP 542 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500058 ER PT J AU Sarker, A Hazra, T Haltiwanger, B Ng, C Nogales, E Sankar, M Cooper, P AF Sarker, A. Hazra, T. Haltiwanger, B. Ng, C. Nogales, E. Sankar, M. Cooper, P. TI Physical and functional interaction of NEIL2 with XPG, CS13 and RNA polymerase II: Implications for transcription-coupled repair of oxidative DNA damage. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Berkeley Lab, Berkeley, CA USA. Univ Texas, Med Branch, Galveston, TX 77550 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 550 EP 550 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500076 ER PT J AU Polyzos, AA Schmid, TE Pina-Guzman, B Quintanilla-Vega, B Marchetti, F AF Polyzos, A. A. Schmid, T. E. Pina-Guzman, B. Quintanilla-Vega, B. Marchetti, F. TI Tobacco smoking compromises the genetic integrity of mouse sperm. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Berkeley Lab, Berkeley, CA USA. CINVESTAV, Mexico City 14000, DF, Mexico. NR 0 TC 0 Z9 0 U1 2 U2 3 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 556 EP 556 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500088 ER PT J AU Glenn, TC Tsyusko, OT Aizawa, K Yi, Y Coughlin, D Jones, KL Hinton, TG Zimbrick, JD AF Glenn, T. C. Tsyusko, O. T. Aizawa, K. Yi, Y. Coughlin, D. Jones, K. L. Hinton, T. G. Zimbrick, J. D. TI Variance in radiation induced tandem repeat mutation rates among families and stages of spermatogenesis in the medalkafish. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Savannah River Ecol Lab, Aiken, SC USA. Colorado State Univ, Ft Collins, CO 80523 USA. RI Glenn, Travis/A-2390-2008 NR 0 TC 0 Z9 0 U1 0 U2 3 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 557 EP 557 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500090 ER PT J AU Vanhaecke, L Knize, MG Derycke, L Le Curieux, F Bracke, M Verstraete, W AF Vanhaecke, L. Knize, M. G. Derycke, L. Le Curieux, F. Bracke, M. Verstraete, W. TI Intestinal bacteria play a crucial role in the carcinogenic risk from 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Univ Ghent, Lab Microbial Ecol & Technol, B-9000 Ghent, Belgium. Lawrence Livermore Natl Lab, Livermore, CA USA. Univ Ghent, Lab Expt Carcinol, B-9000 Ghent, Belgium. Inst Pasteur, Lab Genet Toxicol, F-59019 Lille, France. NR 1 TC 0 Z9 0 U1 0 U2 3 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 560 EP 560 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500095 ER PT J AU Bhattacharya, S Marchetti, F Wyrobek, AJ AF Bhattacharya, S. Marchetti, F. Wyrobek, A. J. TI Bioinformatics analyses of low-and high-dose radiation induced signaling pathways in mouse brain tissue as predicted from transcript profiling. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 565 EP 565 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500106 ER PT J AU Schmid, TE Marchetti, F Polyzos, A Bhatnagar, S Wyrobek, AJ AF Schmid, T. E. Marchetti, F. Polyzos, A. Bhatnagar, S. Wyrobek, A. J. TI The Tp53 gene is a key regulator of the radioadaptive response for DNA damage in vivo. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 566 EP 566 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500108 ER PT J AU Hinz, JM Wilson, PF Urbin, SS Nham, PB Thompson, LH AF Hinz, J. M. Wilson, P. F. Urbin, S. S. Nham, P. B. Thompson, L. H. TI Rad51d-defective CHO cells show radiosensitivity and radiation-induced chromosomal aberrations in S and G2 phases of the cell cycle. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Livermore Natl Lab, Livermore, CA USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 568 EP 568 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500112 ER PT J AU Whalen, MK Gurai, SK Pluth, JM AF Whalen, M. K. Gurai, S. K. Pluth, J. M. TI Profiling key phospho-protein kinetics in different cell types after low and high LET exposure. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 574 EP 574 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500125 ER PT J AU Yu, ET Gaucher, SP Sale, K Young, MM Hadi, MZ AF Yu, E. T. Gaucher, S. P. Sale, K. Young, M. M. Hadi, M. Z. TI Application of protein footprinting, crosslinking, and mass spectrometry in mapping Ape1 contacts during BER progression. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Sandia Natl Labs, Livermore, CA 94551 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 579 EP 579 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500136 ER PT J AU Martinez, A Hinz, J Gomez-Laguna, L Molina, B Acuna, W Frias, S Coleman, M AF Martinez, A. Hinz, J. Gomez-Laguna, L. Molina, B. Acuna, W. Frias, S. Coleman, M. TI Expression of p53 regulated genes in Fanconi anemia cells after mitomycin C and hydroxyurea exposure. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Lawrence Livermore Natl Lab, CMLS, Livermore, CA 94551 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 581 EP 581 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500140 ER PT J AU Xing, C Eskenazi, B Li, G Weldon, RH Kurtovich, E Young, S Schmid, T Zhang, L Rappaport, SM Wyrobek, AJ Marchetti, F AF Xing, C. Eskenazi, B. Li, G. Weldon, R. H. Kurtovich, E. Young, S. Schmid, T. Zhang, L. Rappaport, S. M. Wyrobek, A. J. Marchetti, F. TI Benzene induces aneuploidy of sex chromosomes and chromosome 21 in the sperm of occupationally-exposed Chinese men. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Chinese Ctr Dis Control & Prevent, Beijing, Peoples R China. NR 0 TC 0 Z9 0 U1 0 U2 1 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 611 EP 611 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500207 ER PT J AU Bourguet, F Krefft, A Peterson, LE Coleman, MA AF Bourguet, F. Krefft, A. Peterson, L. E. Coleman, M. A. TI Identification of novel TP53 regulated genes induced by ionizing radiation. SO ENVIRONMENTAL AND MOLECULAR MUTAGENESIS LA English DT Meeting Abstract CT 38th Annual Meeting of the Environmental-Mutagen-Society CY OCT 20-24, 2007 CL Atlanta, GA SP Environm Mutagen Soc C1 LLNL, Livermore, CA USA. Methodist Hosp, Dept Publ Hlth, Houston, TX 77030 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU WILEY-LISS PI HOBOKEN PA DIV JOHN WILEY & SONS INC, 111 RIVER ST, HOBOKEN, NJ 07030 USA SN 0893-6692 J9 ENVIRON MOL MUTAGEN JI Environ. Mol. Mutagen. PD AUG PY 2007 VL 48 IS 7 BP 629 EP 629 PG 1 WC Environmental Sciences; Genetics & Heredity; Toxicology SC Environmental Sciences & Ecology; Genetics & Heredity; Toxicology GA 201XI UT WOS:000248865500248 ER PT J AU Yang, DQ Kwan, SH Lu, T Fu, QY Cheng, JM Streets, DG Wu, YM Li, JJ AF Yang, Dong-Qing Kwan, Stephanie H. Lu, Tao Fu, Qing-Yan Cheng, Jian-Min Streets, David G. Wu, Ya-Ming Li, Jin-Ju TI An emission inventory of marine vessels in Shanghai in 2003 SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID BOUNDARY-LAYER; UNITED-STATES; ASIAN WATERS; SHIPS; IMPACT; NITROGEN AB We developed an air pollutant emission inventory for marine vessels in the Shanghai Port in 2003. We estimated emissions under cruising and maneuvering conditions based on two categories of vessels: (1) vessels in the Outer Port, which enter the area following notification of the Shanghai Maritime Safety Administration, a division of the Ministry of Communications of P.R. China; and (2) vessels in internal waterways, which enter those waters following notification of the local Port Administration Centers. Vessels in the Outer Port consist of three subcategories: (1) international vessels that are engaged in foreign commerce; (2) domestic vessels traveling along the downstream portion of the Huangpu River; and (3) domestic vessels traveling along the coast. We also estimate emissions from vessels over 1000 DWT operating under hotelling conditions in the Outer Port. In 2003, the total number of calls was approximately 1.3 million, of which 57% is attributed to vessels in internal waterways and 43% to vessels in the Outer Port. Total marine emissions for NO(x), SO(2), PM, HC, and CO(2) in 2003 are estimated to be 58 160, 51 180, 6960, 4560, and 3 012 800 tons, respectively. Emissions are allocated to 1 km x 1 km grid cells for the 129 km x 102 km Shanghai Port study domain. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Shanghai Environm Monitoring Ctr, Shanghai 200030, Peoples R China. Georgia Inst Technol, Sch Civil & Environm Engn, Atlanta, GA 30332 USA. Shanghai Port Adm Ctr, Shanghai 200120, Peoples R China. RP Streets, DG (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM dstreets@anl.gov OI Streets, David/0000-0002-0223-1350 NR 20 TC 21 Z9 28 U1 4 U2 26 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 1 PY 2007 VL 41 IS 15 BP 5183 EP 5190 DI 10.1021/es061979c PG 8 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 194KP UT WOS:000248343600001 PM 17822077 ER PT J AU Liu, CX AF Liu, Chongxuan TI An ion diffusion model in semi-permeable clay materials SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID EXCLUSION; SOLUTE; SPACE; SOIL AB Clay materials typically contain negative surface charges that induce electrostatic fields (or diffuse double layers) in electrolytes. During ion diffusion in a porous medium of clay materials, ions dynamically interact with the electrostatic fields associated with individual clay grains by depressing or expanding the electrostatic double layers, which subsequently affects ionic fluxes. Current theory of ion transport in porous media, however, cannot explicitly account for the dynamic interactions. Here we proposed a model by coupling electrodynamics and nonequilibrium thermodynamics (EDNT) to describe ion diffusion in clay materials as a complex function of factors including clay surface charge density, tortuosity, porosity, chemico-osmotic coefficient, and ion self-diffusivity. The model was validated by comparing the calculated and measured apparent ion diffusion coefficients in clay materials as a function of ionic strength. At transitional states, ion diffusive fluxes are dynamically related to the electrostatic fields, which shrink or expand as ion diffusion occurs. At steady states, the electrostatic fields are time-invariant and ion diffusive fluxes conform to flux and concentration gradient relationships; and apparent diffusivity can be approximated by the ion diffusivity in bulk electrolytes corrected by a tortuosity factor and macroscopic concentration discontinuities at the interfaces between clay materials and bulk solutions. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Liu, CX (reprint author), Pacific NW Natl Lab, POB 999,MSIN K8-96, Richland, WA 99352 USA. EM Chongxuan.liu@pnl.gov RI Liu, Chongxuan/C-5580-2009; OI Liu, Chongxuan/0000-0002-2180-6770 NR 19 TC 8 Z9 9 U1 4 U2 18 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 1 PY 2007 VL 41 IS 15 BP 5403 EP 5409 DI 10.1021/es0624117 PG 7 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 194KP UT WOS:000248343600033 PM 17822109 ER PT J AU Maxwell, RM Welty, C Harvey, RW AF Maxwell, Reed M. Welty, Claire Harvey, Ronald W. TI Revisiting the cape cod bacteria injection experiment using a stochastic modeling approach SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID HETEROGENEOUS POROUS-MEDIA; GRADIENT TRACER TEST; HYDRAULIC CONDUCTIVITY; VIRUS TRANSPORT; LARGE-SCALE; BED FILTRATION; GROUNDWATER; SAND; SIMULATION; AQUIFERS AB Bromide and resting-cell bacteria tracer tests conducted in a sandy aquifer at the U.S. Geological Survey Cape Cod site in 1987 were reinterpreted using a three-dimensional stochastic approach. Bacteria transport was coupled to colloid filtration theory through functional dependence of local-scale colloid transport parameters upon hydraulic conductivity and seepage velocity in a stochastic advection-dispersion/attachment-detachment model. Geostatistical information on the hydraulic conductivity (K) field that was unavailable at the time of the original test was utilized as input. Using geostatistical parameters, a groundwater flow and particle-tracking model of conservative solute transport was calibrated to the bromide-tracer breakthrough data. An optimization routine was employed over 100 realizations to adjust the mean and variance of the natural-logarithm of hydraulic conductivity (lnK) field to achieve best fit of a simulated, average bromide breakthrough curve. A stochastic particle-tracking model for the bacteria was run without adjustments to the local-scale colloid transport parameters. Good predictions of mean bacteria breakthrough were achieved using several approaches for modeling components of the system. Simulations incorporating the recent Tufenkji and Elimelech (Environ. Sci. Technol. 2004, 38, 529-536) correlation equation for estimating single collector efficiency were compared to those using the older Rajagopalan and Tien (AIChE J. 1976, 22, 523-533) model. Both appeared to work equally well at predicting mean bacteria breakthrough using a constant mean bacteria diameter for this set of field conditions. Simulations using a distribution of bacterial cell diameters available from original field notes yielded a slight improvement in the model and data agreement compared to simulations using an average bacterial diameter. The stochastic approach based on estimates of local-scale parameters for the bacteria-transport process reasonably captured the mean bacteria transport behavior and calculated an envelope of uncertainty that bracketed the observations in most simulation cases. C1 Lawrence Livermore Natl Lab, Atmospher Earth & Energy Dept, Livermore, CA 94550 USA. Univ Maryland Baltimore Cty, Dept Civil & Environm Engn, Baltimore, MD 21250 USA. Ctr Urban Environm Res & Educ, Baltimore, MD 21250 USA. US Geol Survey, Boulder, CO 80303 USA. RP Maxwell, RM (reprint author), Lawrence Livermore Natl Lab, Atmospher Earth & Energy Dept, L-208,7000 E Ave, Livermore, CA 94550 USA. EM maxwell5@llnl.gov RI Harvey, Ronald/C-5783-2013; Maxwell, Reed/D-7980-2013 OI Harvey, Ronald/0000-0002-2791-8503; Maxwell, Reed/0000-0002-1364-4441 NR 55 TC 33 Z9 33 U1 0 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD AUG 1 PY 2007 VL 41 IS 15 BP 5548 EP 5558 DI 10.1021/es062693a PG 11 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA 194KP UT WOS:000248343600055 PM 17822131 ER PT J AU Bergeron, CM Husak, JF Unrine, JM Romanek, CS Hopkins, WA AF Bergeron, Christine M. Husak, Jerry F. Unrine, Jason M. Romanek, Christopher S. Hopkins, William A. TI Influence of feeding ecology on blood mercury concentrations in four species of turtles SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY LA English DT Article DE turtle; mercury; selenium; trophic position; stable isotopes ID SNAPPING TURTLES; FOOD-WEB; BIOACCUMULATION; CONTAMINATION; DIET; METHYLMERCURY; EXPOSURE; MONITORS; DELTA-N-15; SPECIATION AB Mercury is a relatively well-studied pollutant because of its global distribution, toxicity, and ability to bioaccumulate and biomagnify in food webs; however, little is known about bioaccumulation and toxicity of Hg in turtles. Total Hg (THg) concentrations in blood were determined for 552 turtles representing four different species (Chelydra serpentina, Sternotherus odoratus, Chrysemys pieta, and Pseudemys rubriventris) from a Hg-contaminated site on the South River (VA, USA) and upstream reference sites. Methylmercury and Se concentrations also were determined in a subset of samples. Because the feeding ecology of these species differs drastically, stable isotopes of carbon (delta(13)C) and nitrogen (delta(15)N) were employed to infer the relationship between relative trophic position and Hg concentrations. Significant differences were found among sitss and species, suggesting that blood can be used as a bioindicator of Hg exposure in turtles. We found differences in THg concentrations in turtles from the contaminated site that were consistent with their known feeding ecology: C. serpentina >= S. odoratus > C. picta > P. rubriventris. This trend was generally supported by the isotope data, which suggested that individual turtles were feeding at more than one trophic level. Methylmercury followed similar spatial patterns as THg and was the predominant Hg species in blood for all turtles. Blood Se concentrations were low in the system, but a marginally positive relationship was found between THg and Se when species were pooled. The blood THg concentrations for the turtles in the present study are some of the highest reported in reptiles, necessitating further studies to investigate potential adverse effects of these high concentrations. C1 Virginia Polytech Inst & State Univ, Dept Fisheries & Wildlife Sci, Wildlife Ecotoxicol & Physiol Ecol Program, Blacksburg, VA 24061 USA. Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ Georgia, Dept Geol, Athens, GA 30602 USA. RP Hopkins, WA (reprint author), Virginia Polytech Inst & State Univ, Dept Fisheries & Wildlife Sci, Wildlife Ecotoxicol & Physiol Ecol Program, Blacksburg, VA 24061 USA. EM hopkinsw@vt.edu NR 50 TC 47 Z9 47 U1 3 U2 23 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 0730-7268 J9 ENVIRON TOXICOL CHEM JI Environ. Toxicol. Chem. PD AUG PY 2007 VL 26 IS 8 BP 1733 EP 1741 DI 10.1897/06-594R.1 PG 9 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA 190UJ UT WOS:000248085800024 PM 17702349 ER PT J AU Frick, WE Khangaonkar, T Sigleo, AC Yang, ZQ AF Frick, Walter E. Khangaonkar, Tarang Sigleo, Anne C. Yang, Zhaoqing TI Estuarine-ocean exchange in a North Pacific estuary: Comparison of steady state and dynamic models SO ESTUARINE COASTAL AND SHELF SCIENCE LA English DT Article DE entrainment; nearshore currents; models; plumes; steady state; tidal currents; Pacific ocean; Oregon ID COASTAL OCEAN; OREGON COAST; BAY; CIRCULATION; TRANSPORT; EQUATIONS; CLOSURE; PLUME; SEA; USA AB Nutrient levels in coastal waters must be accurately assessed to determine the nutrient effects of increasing populations on coastal ecosystems. To accomplish this goal, in-field data with sufficient temporal resolution are required to define nutrient sources and sinks, and to ultimately calculate nutrient budgets. Models then are required for the interpretation and analysis of data sets. To quantify the coastal ocean nitrogen input to Yaquina Bay, Oregon, nitrate concentrations were measured by a moored sensor hourly for one month during summer upwelling some distance outside the estuary entrance jetties. The time series results then were interpreted using a steady state model (Visual Plumes' PDSW) and a hydrodynamic model, the Finite Volume Coastal Ocean Model (FVCOM). The physical scales of many stream and river plumes often lie between the scales for outfall mixing zone plume models, such as those found in EPA's Visual Plumes, and larger-sized grid scales for regional circulation models like FVCOM. A potential advantage of relatively simple, steady state plume models is that they use entrainment terms to close the plume equations, theory that has proven useful in simulating turbulent plume discharges from various sources, some approaching the dimensions of rivers. Important advantages of models like FVCOM are that they are dynamic and include the effects of the Earth's rotation. The results showed that the steady-state plume model simulates observed velocity and concentration data fairly well during periods of strong discharge velocity and weak ambient coastal currents. FVCOM was judged to give better estimates under all other ambient current conditions, although the data from the mooring cannot be used to prove this assertion as stronger currents would deflect the plume away from the mooring. Nevertheless, plume models may be useful in establishing boundary and initial conditions for hydrodynamic models. (C) 2007 Elsevier Ltd. All rights reserved. C1 US EPA, Ecosyst Res Ctr, Athens, GA 30605 USA. Battelle Marine Sci Div, Seattle, WA 98109 USA. US EPA, Western Ecol Div, Newport, OR 97365 USA. RP Frick, WE (reprint author), US EPA, Ecosyst Res Ctr, 960 Coll Stn Rd, Athens, GA 30605 USA. EM frick.walter@epa.gov; tarang.khangaonkar@pnl.gov; sigleo.anne@epa.gov; zhaoqing.yang@pnl.gov NR 30 TC 12 Z9 14 U1 1 U2 6 PU ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND SN 0272-7714 J9 ESTUAR COAST SHELF S JI Estuar. Coast. Shelf Sci. PD AUG PY 2007 VL 74 IS 1-2 BP 1 EP 11 DI 10.1016/j.ecss.2007.02.019 PG 11 WC Marine & Freshwater Biology; Oceanography SC Marine & Freshwater Biology; Oceanography GA 188GN UT WOS:000247907900001 ER EF