FN Thomson Reuters Web of Science™ VR 1.0 PT J AU Davis, J Modest, J Larson, T Smart, J Brainard, JR Sommerville, LE AF Davis, J Modest, J Larson, T Smart, J Brainard, JR Sommerville, LE TI Reductive dissolution of alpha-geothite by Enterococcus faecalis. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FT LEWIS COLL,DEPT CHEM,DURANGO,CO 81301. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 291 EP CHED PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201303 ER PT J AU Butcher, PJ Clark, DL Huffman, JC VincentHollis, RL Scott, BL Watkin, JG AF Butcher, PJ Clark, DL Huffman, JC VincentHollis, RL Scott, BL Watkin, JG TI Synthesis and reactivity of lanthanum aryloxide complexes containing ETA-arene interactions SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 294 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203314 ER PT J AU Dadmun, MD AF Dadmun, MD TI Response of liquid crystalline polymers to an applied shear flow: Steady state and relaxation behavior. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 295 EP POLY PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501522 ER PT J AU Warner, BP Burns, CJ AF Warner, BP Burns, CJ TI Redox couples of organouranium compounds SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 295 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203315 ER PT J AU Miller, RL Scott, BL Melo, MM Abney, KD Balaich, GJ AF Miller, RL Scott, BL Melo, MM Abney, KD Balaich, GJ TI New routes to C-substituted derivatives of cobalt dicarbollide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CST 11,LOS ALAMOS,NM 87545. USAF ACAD,COLORADO SPRINGS,CO 80840. RI Chamberlin, Rebecca/A-1335-2011 OI Chamberlin, Rebecca/0000-0001-6468-7778 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 296 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203316 ER PT J AU Pagoria, PF Mitchell, AR Schmidt, RD AF Pagoria, PF Mitchell, AR Schmidt, RD TI Vicarious amination of nitroarenes with trimethylhydrazinium iodide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 296 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500651 ER PT J AU Rabinovich, D Haswell, CM Scott, BL Miller, RL Nielsen, JB Abney, KD AF Rabinovich, D Haswell, CM Scott, BL Miller, RL Nielsen, JB Abney, KD TI New dicarbollide complexes of uranium. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CST 11,LOS ALAMOS,NM 87545. RI Chamberlin, Rebecca/A-1335-2011 OI Chamberlin, Rebecca/0000-0001-6468-7778 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 297 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203317 ER PT J AU Dai, S Toth, LM AF Dai, S Toth, LM TI Structural stability and photochemistry of uranium(V) chloride and oxychloride complexes in ambient temperature melts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 300 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203320 ER PT J AU Britt, PF Buchanan, AC AF Britt, PF Buchanan, AC TI Impact of restricted mass transport on the free-radical decomposition of phenethyl phenyl ether. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 335 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500690 ER PT J AU Assink, RA Prabakar, S AF Assink, RA Prabakar, S TI Hydrolysis, condensation and connectivity in inorganic-organic hybrid sol-gel materials. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ADV MAT LAB,ALBUQUERQUE,NM 87106. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 336 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203355 ER PT J AU Lukehart, CM Milne, SB Wittig, JE Stock, SR Carpenter, JP Rek, ZU AF Lukehart, CM Milne, SB Wittig, JE Stock, SR Carpenter, JP Rek, ZU TI Preparation of nanocomposites containing nanoclusters of transition metals. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 VANDERBILT UNIV,DEPT CHEM,NASHVILLE,TN 37235. VANDERBILT UNIV,DEPT APPL & ENGN SCI,NASHVILLE,TN 37235. GEORGIA INST TECHNOL,SCH MAT SCI & ENGN,ATLANTA,GA 30332. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 377 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203394 ER PT J AU Ralle, M Habenschuss, A Wunderlich, B AF Ralle, M Habenschuss, A Wunderlich, B TI Crystal structure determination of tetraalkylammonium halides by X-ray powder diffraction. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 382 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203399 ER PT J AU Clark, JF Rohal, KM Clark, DL Dixon, FM Schroeder, NC Strauss, SH AF Clark, JF Rohal, KM Clark, DL Dixon, FM Schroeder, NC Strauss, SH TI Extraction and recovery of ReO4- and TcO4- using Fe(II)/Fe(III) complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 COLORADO STATE UNIV,DEPT CHEM,FT COLLINS,CO 80523. LOS ALAMOS NATL LAB,NUCL & RADIOCHEM GRP CST11,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 389 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203406 ER PT J AU Balaich, GJ Miller, RL Abney, KD AF Balaich, GJ Miller, RL Abney, KD TI Synthesis of cobalt dicarbollide derivatives for addition and condensation polymerization. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,NUCL & RADIOCHEM GRP,LOS ALAMOS,NM 87545. USAF ACAD,DEPT CHEM,COLORADO SPRINGS,CO 80840. RI Chamberlin, Rebecca/A-1335-2011 OI Chamberlin, Rebecca/0000-0001-6468-7778 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 390 EP INOR PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203407 ER PT J AU Chase, RR Rieke, PC Guenther, D Douglas, D Anderson, D AF Chase, RR Rieke, PC Guenther, D Douglas, D Anderson, D TI Influence of ion beam etching parameters on resolution of biomimetically deposited iron oxyhydroxide thin films. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 EASTERN OREGON STATE COLL, DEPT CHEM, LA GRANDE, OR 97850 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. WASHINGTON STATE UNIV, PULLMAN, WA 99163 USA. CASCADE HIGH SCH, LEAVENWORTH, WA 98826 USA. TROUT LAKE HIGH SCH, TROUT LAKE, WA 98650 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 390 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201402 ER PT J AU Mao, Y Bakac, A AF Mao, Y Bakac, A TI Photochemical oxidation of benzene and its methylated derivatives by hydrogen peroxide SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 391 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203408 ER PT J AU Jacob, J Espenson, JH AF Jacob, J Espenson, JH TI Oxidation of methyl aromatics catalyzed by Methylrhenium trioxide SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 408 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500763 ER PT J AU Zhu, Z Espenson, J AF Zhu, Z Espenson, J TI Organic transformations catalyzed by methylrhenium trioxide (MTO) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 409 EP ORGN PN 2 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500764 ER PT J AU Buchanan, AC Britt, PF Struss, JA AF Buchanan, AC Britt, PF Struss, JA TI Investigations of solid-state, acid-cracking reactions for lignin model compounds SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 414 EP ORGN PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48500769 ER PT J AU Bisset, WC Zincircioglu, O Smith, PH Gopalan, AS AF Bisset, WC Zincircioglu, O Smith, PH Gopalan, AS TI Synthesis and comparison of metal, ion binding properties of some polyhydroxamate chelators. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 428 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203445 ER PT J AU Zubkowski, JD Washington, DA Cannon, T Valente, EJ Parks, CD Perry, DL AF Zubkowski, JD Washington, DA Cannon, T Valente, EJ Parks, CD Perry, DL TI Copper(II) levulinates .1. Structure of [Cu(O2C(CH2)(2)COCH3)(4)](n) and Cu-4(O2CCH2CH2COCH3)(6)(PPh(3))(4). SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 JACKSON STATE UNIV,DEPT CHEM,JACKSON,MS 39217. MISSISSIPPI COLL,DEPT CHEM,CLINTON,MS 39058. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 435 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203452 ER PT J AU Loy, DA Jamison, GM Opperman, KA Beach, JV Waymouth, RM AF Loy, DA Jamison, GM Opperman, KA Beach, JV Waymouth, RM TI Oligosilane-siloxane nanocomposites. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,ALBUQUERQUE,NM 87185. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 450 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203467 ER PT J AU Loy, DA Baugher, BM AF Loy, DA Baugher, BM TI Comparison of bridged polysilsesquioxane xerogels prepared from methoxy-, ethoxy- and propoxy-silyl monomers. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,ALBUQUERQUE,NM 87185. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 451 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203468 ER PT J AU Derzon, DK Ulibarri, TA AF Derzon, DK Ulibarri, TA TI Relative humidity and temperature effects in organic-inorganic nanocomposites SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 460 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203477 ER PT J AU Wu, RL Odom, JD Dunlap, RB Silks, LA AF Wu, RL Odom, JD Dunlap, RB Silks, LA TI Synthesis and applications of chiral selone adducts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,BIOCHEM & SPECT SECT,LOS ALAMOS,NM 87545. UNIV S CAROLINA,DEPT CHEM & BIOCHEM,COLUMBIA,SC 29208. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 490 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203507 ER PT J AU Corbett, SM Barbas, JT AF Corbett, SM Barbas, JT TI The photolysis of trans-stilbene on silica surfaces. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 VALDOSTA STATE COLL,DEPT CHEM,VALDOSTA,GA 31698. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 493 EP CHED PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201507 ER PT J AU Kubas, GJ Butts, MD Lundmark, PJ AF Kubas, GJ Butts, MD Lundmark, PJ TI Metal SO2 and sulfide chemistry, syntheses of dinuclear Pd(0) and Pt(0) mu-SO2 clusters, cationic Pt(II)-halocarbon complexes, and a dianionic Cp(2)Ti(2)S(4) cluster. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 511 EP INOR PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203528 ER PT J AU Ulibarri, TA Loy, DA Bates, SE Black, EP Jamison, GM Myers, S Assink, RA Shea, KJ AF Ulibarri, TA Loy, DA Bates, SE Black, EP Jamison, GM Myers, S Assink, RA Shea, KJ TI Bridged polysilsesquioxane-polydimethylsiloxane nanocomposites: A reactivity study. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 522 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203539 ER PT J AU AbuOmar, MM Espenson, AH AF AbuOmar, MM Espenson, AH TI Facile oxygen atom abstraction from inorganic ions by methylrhenium dioxide. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 528 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203545 ER PT J AU Fryxell, GE Rieke, PC Stiff, CM AF Fryxell, GE Rieke, PC Stiff, CM TI Synthesis of self-assembled monolayers for biomimetic nucleation studies. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NW NAZARENE COLL, NAMPA, ID 83686 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 542 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201556 ER PT J AU Walters, TM Sram, JP Easdon, JC Smith, BF AF Walters, TM Sram, JP Easdon, JC Smith, BF TI Synthesis of 4-acyl-5-thiopyrazolones. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 COLL OZARKS,DEPT CHEM,POINT LOOKOUT,MO 65726. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 543 EP CHED PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48201557 ER PT J AU Arterburn, JB Hall, KA Fogarty, IM Goreham, DM Bryan, JC Ott, KC AF Arterburn, JB Hall, KA Fogarty, IM Goreham, DM Bryan, JC Ott, KC TI Synthesis and characterization of functionalized rhenium imido complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 548 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203565 ER PT J AU Wu, RL Unkefer, CJ Silks, LA AF Wu, RL Unkefer, CJ Silks, LA TI Synthesis of D-[U-C-13]glucal, D-[U-C-13]galactal, and L-[U-C-13]fucose for NMR structure studies of oligosaccharides. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,BIOCHEM & SPECT SECT,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 576 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203593 ER PT J AU Birnbaum, ER LeLacheur, RM Tumas, W AF Birnbaum, ER LeLacheur, RM Tumas, W TI Selective catalytic oxidation in supercritical carbon dioxide: Air oxidation of cyclohexene by halogenated iron porphyrin catalysts. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 592 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203609 ER PT J AU Cook, GK Andrews, MA AF Cook, GK Andrews, MA TI Catalytic di-dehydroxylation of diols and carbohydrates to alkenes by (pentamethylcyclopentadienyl)trioxorhenium(VII) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 600 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203617 ER PT J AU Ulibarri, TA Bates, SE Black, EP Schaefer, DW Beaucage, G Lee, MK Moore, PA Burns, GT AF Ulibarri, TA Bates, SE Black, EP Schaefer, DW Beaucage, G Lee, MK Moore, PA Burns, GT TI The effect of solvent compatibilization in nanocomposite materials. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CINCINNATI,CINCINNATI,OH 45221. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. DOW CORNING CORP,MIDLAND,MI 48686. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 606 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203623 ER PT J AU Small, JH Tran, J Shea, KJ Loy, DA Carpenter, JP AF Small, JH Tran, J Shea, KJ Loy, DA Carpenter, JP TI Synthesis and characterization of amine-containing hybrid organic-inorganic bridged polysilsesquioxane and siloxane stargels. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 609 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203626 ER PT J AU McClain, MD Jamison, GM Loy, DA AF McClain, MD Jamison, GM Loy, DA TI Thermal oligomerization of phenyl phosphaacetylene SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,ALBUQUERQUE,NM 87185. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 621 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203638 ER PT J AU Kennedy, JR AF Kennedy, JR TI Disproportionation and phase separation in intercalated binary metal halides. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO NATL ENGN LAB,RES CTR,IDAHO FALLS,ID 83415. MONTANA STATE UNIV,DEPT CHEM,BOZEMAN,MT 59717. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 632 EP INOR PN 1 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203649 ER PT J AU Kennedy, JR AF Kennedy, JR TI Towards high temperature chemical sensors. Inclusion chemistry of certain Ta/P/S phases. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. MONTANA STATE UNIV,DEPT CHEM,BOZEMAN,MT 59717. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 633 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203650 ER PT J AU Yuchs, SE Wasserman, SR AF Yuchs, SE Wasserman, SR TI The effect of surface modification on the ion-exchange properties of layered aluminosilicates. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 638 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203655 ER PT J AU Whinnery, LRL Coutts, DK Even, BR Beach, JV Loy, DA AF Whinnery, LRL Coutts, DK Even, BR Beach, JV Loy, DA TI Engineering macrostructure in ceramics. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,MAT SYNTH DEPT,LIVERMORE,CA 94551. PROP ORGAN MAT DEPT,ALBUQUERQUE,NM 87185. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 663 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203680 ER PT J AU Kennedy, JR AF Kennedy, JR TI Structural studies on the inclusion chemistry of the solvato-chromic Pt(CNR)(4)Pd(CN)(4) double salt complexes. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. MONTANA STATE UNIV,DEPT CHEM,BOZEMAN,MT 59717. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP 679 EP INOR PN 1 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA482 UT WOS:A1996UA48203696 ER PT J AU Thompson, MA AF Thompson, MA TI QM/MMpol: A consistent model for microscopic solvation. Solvent induced blue shirt of the n->pi* excited state of formaldehyde. SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD MAR 24 PY 1996 VL 211 BP A238 EP PHYS PN 2 PG 1 WC Chemistry, Multidisciplinary SC Chemistry GA UA485 UT WOS:A1996UA48501172 ER PT J AU Heller, J Larsen, R Ernst, M Kolbert, AC Baldwin, M Prusiner, SB Wemmer, DE Pines, A AF Heller, J Larsen, R Ernst, M Kolbert, AC Baldwin, M Prusiner, SB Wemmer, DE Pines, A TI Application of rotational resonance to inhomogeneously broadened systems SO CHEMICAL PHYSICS LETTERS LA English DT Article ID POLYCRYSTALLINE SOLIDS; NMR AB A protocol is presented for the determination of internuclear distances using rotational-resonance magnetization-exchange NMR in systems with inhomogeneously broadened lines. Non-linear least-square fitting procedures are used to obtain the distance, the inhomogeneous broadening, the zero-quantum relaxation time, and error estimates for these parameters. We apply this procedure to a biological system of unknown structure. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,STRUCT BIOL DIV,BERKELEY,CA 94720. UNIV CALIF SAN FRANCISCO,DEPT NEUROL,SAN FRANCISCO,CA 94143. RP Heller, J (reprint author), UNIV CALIF BERKELEY,GRAD GRP BIOPHYS,BERKELEY,CA 94720, USA. RI Ernst, Matthias/A-6732-2010; larsen, russell/H-3443-2013 OI Ernst, Matthias/0000-0002-9538-6086; NR 28 TC 17 Z9 17 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 MAR 22 PY 1996 VL 251 IS 3-4 BP 223 EP 229 DI 10.1016/0009-2614(96)00098-X PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UD924 UT WOS:A1996UD92400015 ER PT J AU MarzalCasacuberta, A BlancoVaca, F Ishida, BY JulveGil, J Shen, JH CalvetMarquez, S GonzalezSastre, F Chan, L AF MarzalCasacuberta, A BlancoVaca, F Ishida, BY JulveGil, J Shen, JH CalvetMarquez, S GonzalezSastre, F Chan, L TI Functional lecithin:cholesterol acyltransferase deficiency and high density lipoprotein deficiency in transgenic mice overexpressing human apolipoprotein A-II SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID HUMAN-PLASMA-LIPOPROTEINS; FISH EYE SYNDROME; HEPATIC LIPASE; ESTERIFICATION RATE; SERUM-LIPOPROTEINS; TANGIER DISEASE; GENE; HDL; EXPRESSION; TRANSPORT AB The concentration of high density lipoproteins (HDL) is inversely related to the risk of atherosclerosis, The two major protein components of HDL are apolipoprotein (apo) A-I and apoA-II. To study the role of apoA-II in lipoprotein metabolism and atherosclerosis, we have developed three lines of C57BL/6 transgenic mice expressing human apoA-II (lines 25.3, 21.5, and 11.1). Northern blot experiments showed that human apoA-II mRNA was present only in the liver of transgenic mice, SDS-polyacrylamide gel electrophoresis and Western blot analysis demonstrated a 17.4-kDa human apoA-II in the HDL fraction of the plasma of transgenic mice, After 3 months on a regular chow, the plasma concentrations of human apoA-II were 21 +/- 4 mg/dl in the 25.3 line, 51 +/- 6 mg/dl in the 21.5 line, and 74 +/- 4 mg/dl in the 11.1 line. The concentration of cholesterol in plasma was significantly lower in transgenic mice than in control mice because of a decrease in HDL cholesterol that was greatest in the Line that expressed the most apoA-II (23 mg/dl in the 11.1 line versus 63 mg/dl in control mice). There was also a reduction in the plasma concentration of mouse apoA-I (32 +/- 2, 56 +/- 9, 91 +/- 7, and 111 +/- 2 mg/dl for lines 11.1, 21.5, 25.3, and control mice, respectively) that was inversely correlated with the amount of human apoA-II expressed, Additional changes in plasma lipid/lipoprotein profile noted in line 11.1 that expressed the highest level of human apoA-II include elevated triglyceride, increased proportion of total plasma, and RDL free cholesterol and a marked (>10-fold) reduction in mouse apoA-II. Total endogenous plasma lecithin:cholesterol acyltransferase (LCAT) activity was reduced to a level directly correlated with the degree of increased plasma human apoA-II in the transgenic lines, LCAT activity toward erogenous substrate was, however, only slightly decreased, The biochemical changes in the 11.1 line, which is markedly deficient in plasma apoA-I, an activator for LCAT, are reminiscent of those in patients with partial LCAT deficiency, Feeding the transgenic mice a high fat, high cholesterol diet maintained the mouse apoA-I concentration at a normal level (69 +/- 14 mg/dl in line 11.1 compared with 71 +/- 6 mg/dl in non-transgenic controls) and prevented the appearance of HDL deficiency, All this happened in the presence of a persistently high plasma human apoA-II (96 +/- 14 mg/dl), Paradoxical HDL elevation by high fat diets has been observed in humans and is reproduced in human apoA-II overexpressing transgenic mice but not in control mice. Finally, HDL size and morphology varied substantially in the three transgenic lines, indicating the importance of apoA-II concentration in the modulation of HDL formation, The LCAT and HDL deficiencies observed in this study indicate that apoA-II plays a dynamic role in the regulation of plasma HDL metabolism. C1 BAYLOR COLL MED,DEPT CELL BIOL,HOUSTON,TX 77030. BAYLOR COLL MED,DEPT MED,HOUSTON,TX 77030. UNIV AUTONOMA BARCELONA,DEPT BIOQUIM & BIOL MOLEC,E-08025 BARCELONA,SPAIN. HOSP SANTA CRUZ & SAN PABLO,INST RECERA,E-08025 BARCELONA,SPAIN. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BERKELEY,CA 94720. UNIV AUTONOMA BARCELONA,UNITAT ANAT & EMBRIOL,E-08193 BARCELONA,SPAIN. HOSP SANTA CRUZ & SAN PABLO,SERV BIOQUIM,E-08025 BARCELONA,SPAIN. OI Julve, Josep/0000-0002-6531-2246 FU NHLBI NIH HHS [HL47443, HL16512] NR 70 TC 55 Z9 55 U1 0 U2 1 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAR 22 PY 1996 VL 271 IS 12 BP 6720 EP 6728 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA UB157 UT WOS:A1996UB15700027 PM 8636092 ER PT J AU Kobayashi, K Oka, K Forte, T Ishida, B Teng, BB IshimuraOka, K Nakamuta, M Chan, L AF Kobayashi, K Oka, K Forte, T Ishida, B Teng, BB IshimuraOka, K Nakamuta, M Chan, L TI Reversal of hypercholesterolemia in low density lipoprotein receptor knockout mice by adenovirus-mediated gene transfer of the very low density lipoprotein receptor SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID LDL-RECEPTOR; PROTEIN; RNA; METABOLISM; CLEARANCE; TYPE-5 AB We have used the technique of adenovirus-mediated gene transfer to study the in vivo function of the very low density lipoprotein receptor (VLDLR) in low density lipoprotein receptor (VLDLR) knockout mice. We generated a replication-defective adenovirus (AdmVLDLR) containing mouse VLDLR cDNA driven by a cytomegalovirus promoter, Transduction of cultured Hepa (mouse hepatoma) cells and LDLR-deficient CHO-IdIA7 cells in vitro by the virus led to high-level expression of immunoreactive VLDLR proteins with molecular sizes of 143 kDa and 161 kDa, Digestion of the cell extract with the enzymes neuraminidase, N-glycanase, and O-glycanase resulted in the stepwise lowering of the apparent size of the 161-kDa species toward the 143-kDa species. LDLR (-/-) mice fed a 0.2% cholesterol diet were treated with a single intravenous injection of 3 x 10(9) plaque-forming units of AdmVLDLR, Control LDLR (-/-) mice received either phosphate-buffered saline or AdLacZ, a similar adenovirus containing the LacZ cDNA instead of mVLDLR cDNA. Comparison of the plasma lipids in the 3 groups of mice indicates that in the AdmVLDL animals, total cholesterol is reduced by similar to 50% at days 4 and 9 and returned toward control values on day 21. in these animals, there was also a similar to 30% reduction in plasma apolipoprotein (apo) E accompanied by a 90% fall in apoB-100 on day 4 of treatment, By FPLC analysis, the major reduction in plasma cholesterol in the AdmVLDL animals was accounted for by a marked reduction in the intermediate density lipoprotein/low density lipoprotein (IDL/LDL) fraction. Plasma VLDL, IDL/LDL, and HDL were isolated from the three groups of animals by ultracentrifugal flotation, In the AdmVLDLR animals, there was substantial loss (similar to 65%) of protein and cholesterol mainly in the IDL/LDL fraction on days 4 and 9, Nondenaturing gradient gel electrophoresis indicates a preferential loss of the IDL peak although the LDL peak was also reduced, When I-125-IDL was administered intravenously into animals on day 4, the AdmVLDLR animals cleared the I-125-IDL at a rate 5-10 times higher than the AdLacZ animals. We conclude that adenovirus-mediated transfer of the C1 BAYLOR COLL MED,DEPT CELL BIOL,HOUSTON,TX 77030. BAYLOR COLL MED,DEPT MED,HOUSTON,TX 77030. USDA ARS,CHILDRENS NUTR RES CTR,HOUSTON,TX 77030. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. BAYLOR COLL MED,DEPT PEDIAT,HOUSTON,TX 77030. FU NHLBI NIH HHS [HL-16512, HL-18574] NR 34 TC 93 Z9 94 U1 0 U2 1 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAR 22 PY 1996 VL 271 IS 12 BP 6852 EP 6860 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA UB157 UT WOS:A1996UB15700045 PM 8636110 ER PT J AU Chen, A Corrales, LR AF Chen, A Corrales, LR TI Semiempirical methodology for simulating covalently bonded materials: Application to silicon SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; AMORPHOUS-SILICON; POTENTIALS; LIQUID; MODEL; SI AB A recently introduced semiempirical methodology is used to model and simulate silicon via molecular dynamics. This approach is capable of grasping essential qualitative and quantitative features of the coupling between the electronic coordinates and the geometric structure. Properties of the bulk diamond crystal, the melt and amorphous solid states are obtained using optimization techniques and molecular dynamics simulations. The pair distribution function of the amorphous state is in excellent agreement with experimental and other molecular dynamics simulation results. (C) 1996 American Institute of Physics. RP Chen, A (reprint author), PACIFIC NW NATL LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. NR 34 TC 4 Z9 4 U1 0 U2 1 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 MAR 22 PY 1996 VL 104 IS 12 BP 4632 EP 4641 DI 10.1063/1.471157 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UA381 UT WOS:A1996UA38100029 ER PT J AU Sadus, RJ Prausnitz, JM AF Sadus, RJ Prausnitz, JM TI Three-body interactions in fluids from molecular simulation: Vapor-liquid phase coexistence of argon SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID GIBBS ENSEMBLE AB Gibbs-ensemble molecular simulations are reported for the vapor-liquid phase coexistence of argon using the two-body Lennard-Jones potential. During the simulation, the possible effect of three-body interactions on the pressure and configurational energy of the vapor and liquid phases is estimated by performing calculations with three-body potentials. The intermolecular potentials used for the three-body calculations incorporate the influence of both three-body-dispersion and three-body-repulsion interactions. The results show that three-body repulsion makes a significant contribution to three-body interactions in the liquid phase. The effect of three-body dispersion is offset substantially by three-body repulsion. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP Sadus, RJ (reprint author), SWINBURNE UNIV TECHNOL,SCH COMP SCI & SOFTWARE ENGN,COMP SIMULAT & PHYS APPLICAT GRP,POB 218,HAWTHORN,VIC 3122,AUSTRALIA. NR 16 TC 30 Z9 30 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 22 PY 1996 VL 104 IS 12 BP 4784 EP 4787 DI 10.1063/1.471172 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UA381 UT WOS:A1996UA38100044 ER PT J AU Martin, JE Anderson, RA AF Martin, JE Anderson, RA TI Chain model of electrorheology SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID FLUIDS; RHEOLOGY AB We develop a chain model of an electrorheological fluid in steady and oscillatory shear. This model is based on a balance of hydrodynamic and electrostatic forces and focuses on the mechanical stability of chains. With this model we compute the shape and orientation of an unconfined dipolar chain in steady shear as a function of the shear rate and electric field, and show that this leads to the expected shear-thinning viscosity. We then demonstrate that chains confined by electrodes are unstable in some Mason number regimes. The chain model is extended to the case of oscillatory shear by including a kinetic equation for the aggregation and fragmentation of chains. The resultant chain dynamics is found to be strongly nonlinear, as is the theology. Finally, we consider the effect of local field corrections and long range interactions on the bare dipolar interaction force and derive a self-consistent pair interaction force that demonstrates that the maximum orientation of a chain in shear depends strongly on the dielectric contrast. (C) 1996 American Institute of Physics. RP Martin, JE (reprint author), SANDIA NATL LABS,RES & EXPLORATORY TECHNOL DIV,ALBUQUERQUE,NM 87185, USA. NR 14 TC 138 Z9 138 U1 0 U2 22 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 22 PY 1996 VL 104 IS 12 BP 4814 EP 4827 DI 10.1063/1.471176 PG 14 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UA381 UT WOS:A1996UA38100048 ER PT J AU Hamiche, A Schultz, P Ramakrishnan, V Oudet, P Prunell, A AF Hamiche, A Schultz, P Ramakrishnan, V Oudet, P Prunell, A TI Linker histone-dependent DNA structure in linear mononucleosomes SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE nucleosome position; nucleosome fractionation; DNA wrapping; electron microscopy; chromatin superstructure ID HIGHER-ORDER STRUCTURE; NUCLEOSOME CORE PARTICLE; CHROMATIN RECONSTITUTION; GLOBULAR DOMAIN; MODEL; RINGS; H-5; MOLECULES; ELECTROPHORESIS; SUPERSTRUCTURE AB We have examined the binding of the linker histone H5 (LH) to mononucleosomes. Mononucleosomes reconstituted on short DNA fragments display a series of discrete bands on a gel corresponding to various nucleosome positions along the DNA. When a series of engineered H5s with differing extents of the C-terminal tail are bound to these mononucleosomes, the electrophoretic mobilities of the resulting complexes are altered. Not only is there a general increase in mobility upon complex formation, but there is a reduction in the differences in mobility of the most distal nucleosomes. The complexes were also visualized by electron microscopy. From these two complementary studies, we conclude the following. (1) Entering and exiting DNAs are uncrossed in the LH-free particles, despite a DNA wrapping of 1.65 to 1.7 turns around the histone core. This results from a bending of the entering and exiting DNA away from each other and the histone surface, presumably as a consequence of electrostatic repulsion. This confirms and extends conclusions derived from our recent examination of the same particles in 3D through cryo-electron microscopy. (2) Binding of the globular domain of H5 increases DNA wrapping to 1.8 to 1.9 turns, but fails to induce a crossing due to an accentuation of the bends. (3) The C-terminal tail of H5 bridges entering and exiting DNAs together into a four-stranded stem over a distance of about 30 bp. The occurrence of such a stem may introduce constraints on models of the 30 nm chromatin fiber. (C) 1996 Academic Press Limited C1 INST JACQUES MONOD,CNRS,F-75251 PARIS 05,FRANCE. UNIV PARIS 07,F-75251 PARIS 05,FRANCE. CNRS U184 INSERM,LGME,INST GENET & BIOL MOLEC & CELLULAIRE,F-67404 ILLKIRCH GRAFFENS,FRANCE. UNIV STRASBOURG 1,F-67404 ILLKIRCH GRAFFENS,FRANCE. BNL,DEPT BIOL,UPTON,NY 11973. OI Ramakrishnan, V/0000-0002-4699-2194 FU NIGMS NIH HHS [GM42796] NR 43 TC 142 Z9 142 U1 0 U2 5 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAR 22 PY 1996 VL 257 IS 1 BP 30 EP 42 DI 10.1006/jmbi.1996.0144 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA TZ980 UT WOS:A1996TZ98000004 PM 8632457 ER PT J AU Cheng, XH Gao, QY Smith, RD Simanek, EE Mammen, M Whitesides, GM AF Cheng, XH Gao, QY Smith, RD Simanek, EE Mammen, M Whitesides, GM TI Characterization of hydrogen-bonded aggregates in chloroform by electrospray ionization mass spectrometry SO JOURNAL OF ORGANIC CHEMISTRY LA English DT Article ID COMPLEX C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. HARVARD UNIV, DEPT CHEM, CAMBRIDGE, MA 02138 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 14 TC 61 Z9 63 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3263 J9 J ORG CHEM JI J. Org. Chem. PD MAR 22 PY 1996 VL 61 IS 6 BP 2204 EP 2206 DI 10.1021/jo951345g PG 3 WC Chemistry, Organic SC Chemistry GA UB205 UT WOS:A1996UB20500055 ER PT J AU Cheng, XH Gao, QY Smith, RD Jung, KE Switzer, C AF Cheng, XH Gao, QY Smith, RD Jung, KE Switzer, C TI Comparison of 3',5'- and 2',5'-linked DNA duplex stabilities by electrospray ionization mass spectrometry SO CHEMICAL COMMUNICATIONS LA English DT Article ID HEXOSE-NUCLEIC-ACIDS; OLIGONUCLEOTIDE DUPLEX; ASSOCIATION; LINKAGES AB Two mutually complementary strands of 2',5'-linked DNA form. a unique noncovalent complex observed by electrospray ionization mass spectrometry; by the latter method, the double-stranded state of a 2',5'-linked DNA duplex is less stable than the natural DNA duplex of identical base composition. C1 UNIV CALIF RIVERSIDE, DEPT CHEM, RIVERSIDE, CA 92521 USA. PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 22 TC 13 Z9 13 U1 0 U2 4 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 1359-7345 J9 CHEM COMMUN JI Chem. Commun. PD MAR 21 PY 1996 IS 6 BP 747 EP 748 DI 10.1039/cc9960000747 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UG041 UT WOS:A1996UG04100027 ER PT J AU Johnston, HS Davis, HF Lee, YT AF Johnston, HS Davis, HF Lee, YT TI NO3 photolysis product channels: Quantum yields from observed energy thresholds SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID LASER-INDUCED FLUORESCENCE AB The absorption of visible light by NO3 leads to three products: NO + O-2, NO2 + O, and fluorescence. We report a new method for obtaining quantum yields for the NO3 molecule, using measured energy thresholds separating NO3 and its product channels. The assumptions of this model are the following: (i) NO3 internal energy (photon plus vibrations plus rotations) gives the necessary and sufficient condition to select each of the three product channels, as justified by the observed large differences in reaction times for the three products. (ii) The unresolved complexities of ground-state NO3 spectra and quantum states are approximated by standard separable re-vibrational expressions for statistical mechanical probability functions. These results may be of interest to both physical chemists and atmospheric chemists. The NO3(*) vibronic precursors of the three product channels are identified. We evaluate and plot vibrational state-specific absolute quantum yields as a function of wavelength Phi(vib)(lambda) for each product channel. We sum over vibrational states to give the macroscopic quantum yield as a function of wavelength Phi(lambda), obtained here from 401 to 690 nm and at 190, 230, and 298 K. By adding considerations of light absorption cross sections sigma(lambda) at 230 and 298 K and a stratospheric radiation distribution I(lambda) from 401 to 690 nm, we evaluate the wavelength dependent photochemical rate coefficients j(lambda) for each of the three product channels, and we find the integrated photolysis constants, j(NO), j(NO2), and j(fluorescence). At 298 K, our Phi(lambda) for NO2 + O products agree with the major features observed by Orlando et al. (1993), but show significant systematic offset in the 605-620 nm wavelength range. Our Phi(lambda) for NO + O-2 products at 298 K agree with those observed by Magnotta et al. (1980) within their experimental scatter. Experimental error in our method for measuring quantum yields arises only from errors in measuring the wavelengths at which various product yields approach zero; there is no dependence and, thus, no error arising from light absorption cross sections, light intensities, or species concentrations, which contribute errors to the method of laser photolysis and resonance fluorescence. The results reported here are unique in including quantum yields at 190 and 230 K, which may be useful for modeling atmospheric photochemistry. C1 LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP Johnston, HS (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI Lee, Yuan-Tseh/F-7914-2012 NR 19 TC 49 Z9 49 U1 4 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 21 PY 1996 VL 100 IS 12 BP 4713 EP 4723 DI 10.1021/jp952692x PG 11 WC Chemistry, Physical SC Chemistry GA UB162 UT WOS:A1996UB16200006 ER PT J AU Glendening, ED Feller, D AF Glendening, ED Feller, D TI Dication-water interactions: M(2+)(H2O)(n) clusters for alkaline earth metals M=Mg,Ca,Sr,Ba, and Ra SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MOLECULAR CALCULATIONS; WAVE-FUNCTIONS; BASIS-SETS; HYDROGEN; POTENTIALS; COMPLEXES; ORBITALS; CATIONS; BOND; H2O AB Gas-phase structures, binding energies, and enthalpies are reported for small M(2+)(H2O)(n) clusters consisting of an alkaline earth dication (Mg2+, Ca2+, Sr2+, Ba2+, and Ra2+) with one to six water molecules. Ab initio molecular orbital calculations were performed at the RHF and MP2 levels of theory using split-valence basis sets (6-31+G* with effective core potentials for the heavier alkaline earth metals). The water molecules in these clusters coordinate the dications in highly symmetric arrangements that tend to enhance electrostatic charge-dipole interactions while minimizing ligand-ligand repulsions. Comparisons of the calculated structures and binding energies to higher level treatments reveal fairly reasonable agreement. The optimized M-O distances are slightly long (by 0.02-0.03 Angstrom), and binding energies are somewhat weak (by 1-3 kcal mol(-1) per ligand). Natural energy decomposition analysis emphasizes the importance of polarization effects in the M(2+)(H2O)(n) clusters. Polarization is largely responsible for the nonclassical bent and pyramidal structures of the di- and trihydrates and for the nonadditive, many-body tens that contribute importantly to the binding energies. This study serves, in part, to calibrate the RHF/6-31+G* and MP2/6-31+G* approaches for applications to dication-ligand interactions in more extended systems (such as the ion-selective binding of crown ethers) for which calculations at higher levels of theory are not currently feasible. C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. INDIANA STATE UNIV,DEPT CHEM,TERRE HAUTE,IN 47809. NR 32 TC 126 Z9 127 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 21 PY 1996 VL 100 IS 12 BP 4790 EP 4797 DI 10.1021/jp952546r PG 8 WC Chemistry, Physical SC Chemistry GA UB162 UT WOS:A1996UB16200018 ER PT J AU Feilchenfeld, H Chumanov, G Cotton, TM AF Feilchenfeld, H Chumanov, G Cotton, TM TI Photoreduction of methylviologen adsorbed on silver SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ELECTRONICALLY EXCITED PHOTODISSOCIATION; ENHANCED RAMAN-SCATTERING; ROUGH METAL-SURFACES; DISTANCE DEPENDENCE; PHOTOCHEMISTRY; MOLECULES; CH3BR; PHOTOEMISSION; PHOTOFRAGMENTATION; PHOTODESORPTION AB Methylviologen adsorbed on a roughened silver electrode is reduced to its cation radical upon irradiation with laser light at liquid nitrogen temperature. Surface-enhanced Raman scattering (SERS) spectra were obtained with different excitation wavelengths between 406 and 752 nm and compared to those obtained at room temperature in an electrochemical cell under potential control. From two-color experiments, in which one laser frequency was used to generate the radical and a second to excite the SERS spectra, it was determined that radical formation occurs mainly with excitation in the blue spectral region. A comparison of the SERS spectra of the dication and cation radical forms of methylviologen with their solution spectra suggests that the former interacts more strongly with the surface than the latter. The cation radical appears to be stable for several hours in liquid nitrogen but has a short lifetime at room temperature. Two mechanisms for the photoreduction are discussed: plasmon-assisted electron transfer from the metal to the methylviologen dication and formation of a resonance charge transfer complex. The current experimental data are insufficient to determine the particular role of these mechanisms. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. HEBREW UNIV JERUSALEM,DEPT ORGAN CHEM,IL-91904 JERUSALEM,ISRAEL. NR 35 TC 43 Z9 43 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 21 PY 1996 VL 100 IS 12 BP 4937 EP 4943 DI 10.1021/jp952329q PG 7 WC Chemistry, Physical SC Chemistry GA UB162 UT WOS:A1996UB16200038 ER PT J AU Brown, DE George, SM Huang, C Wong, EKL Rider, KB Smith, RS Kay, BD AF Brown, DE George, SM Huang, C Wong, EKL Rider, KB Smith, RS Kay, BD TI H2O condensation coefficient and refractive index for vapor-deposited ice from molecular beam and optical interference measurements SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID SURFACES; WATER; ADSORPTION; DESORPTION; KINETICS; NITROGEN; RU(001); GASES AB The condensation of H2O on ice multilayers on Ru(001) was studied using both molecular beam and optical interference techniques as a function of surface temperature. From the beam reflection technique, the H2O sticking coefficient, S, was determined to be S = 0.99 +/- 0.03 at temperatures between 85 and 150 K and was independent of incident angle (0-70 degrees) and beam energy (1-40 kcal/mol). Thf condensation coefficient, alpha, was dependent on both the incident H2O flux and the desorption H2O flux at the various surface temperatures. The magnitude of alpha varied continuously from unity at T < 130 K to zero at higher temperatures. The optical interference experiments yielded condensation coefficients and sticking coefficients of alpha = S = 0.97 +/- 0.10 at temperatures from 97 to 145 K where the H2O desorption flux was negligible with respect to the incident flux. The optical interference measurements monitored the ice film thickness versus H2O exposure time and were dependent on the refractive index, n, and the density, rho, of the vapor-deposited ice. Consequently, the combined molecular beam and optical interference measurements provided a means to evaluate the refractive index and density for vapor-deposited ice as a function of surface temperature. The values of the refractive index varied from n = 1.27 at 90 K to n = 1.31 at 130 K. The calculated densities varied from rho = 0.82 g/cm(3) at 90 K to rho = 0.93 g/cm(3) at 130 K. Previous optical interference data were also reanalyzed to yield refractive indices and ice densities for films grown at surface temperatures between 20 and 150 K. Both the refractive index and density increased monotonically with increasing growth temperature. The lower refractive index and density at lower temperatures indicate that microporous ice films are formed when H2O deposits on substrates at T < 120 K. C1 UNIV COLORADO,DEPT CHEM & BIOCHEM,BOULDER,CO 80309. PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352. RI George, Steven/O-2163-2013; Smith, Scott/G-2310-2015 OI George, Steven/0000-0003-0253-9184; Smith, Scott/0000-0002-7145-1963 NR 53 TC 184 Z9 184 U1 0 U2 26 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 21 PY 1996 VL 100 IS 12 BP 4988 EP 4995 DI 10.1021/jp952547j PG 8 WC Chemistry, Physical SC Chemistry GA UB162 UT WOS:A1996UB16200044 ER PT J AU Pandya, KI Heald, SM Hriljac, JA Petrakis, L Fraissard, J AF Pandya, KI Heald, SM Hriljac, JA Petrakis, L Fraissard, J TI Characterization by EXAFS, NMR, and other techniques of Pt/NaY zeolite at industrially relevant low concentration of platinum SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID FINE-STRUCTURE SPECTROSCOPY; ELECTRONIC-STRUCTURE; METAL-CATALYSTS; Y-ZEOLITE; PARTICLES; CLUSTERS; SIZE; HYDROGEN AB In-situ extended X-ray absorption fine structure (EXAFS), H-1 and Xe nuclear magnetic resonance (NMR), H-2 chemisorption, X-ray powder diffraction (XPD), and high-resolution electron microscopy (HREM) techniques were used to understand, as precisely as possible, carefully prepared Pt/Y zeolite samples at industrially relevant low levels of Pt loadings. These techniques were used to determine the local structure, size, and location of the metal particles for a series of 0.8 wt % Pt/NaY zeolite catalysts which have been reduced at 300, 500, and 650 degrees C. The EXAFS and NMR results show that the metal particles are smallest, as expected, for the sample reduced at 300 degrees C, with an average size of 11.3 Angstrom and containing 30 atoms, assuming a spherical shape. These particles are located primarily inside the supercages. For the samples reduced at 500 and 650 degrees C, the size and location of the Pt particles are distinctly different from those for the 300 degrees C sample; i.e., the particles are larger and increasingly located outside the supercages. The sizes of the Pt particles obtained from the first shell analysis for the samples reduced at 500 and 650 degrees C are 23 and 45 Angstrom, respectively. The Pt particles for the sample reduced at 650 Angstrom C are completely outside the zeolite crystallite, while for the 500 degrees C sample 23% of the particles are outside. The XPD results show that the full-width-half-maximum (fwhm) of the zeolite X-ray diffraction peaks decreases as the reduction temperature increases, indicating enhanced crystallinity of the framework and repair of the possible damage from the agglomeration and movement of the Pt particles, Comparison of EXAFS results of samples prepared with different techniques shows that the average metal particle size is 10 +/- 2 Angstrom for reduction temperatures up to 360 degrees C, and above this a rapid growth of metal particles is seen. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. NR 31 TC 23 Z9 23 U1 3 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 21 PY 1996 VL 100 IS 12 BP 5070 EP 5077 DI 10.1021/jp9530360 PG 8 WC Chemistry, Physical SC Chemistry GA UB162 UT WOS:A1996UB16200054 ER PT J AU Luzar, M Rosen, ME Caldarelli, S AF Luzar, M Rosen, ME Caldarelli, S TI Conformational distribution of n-hexane in a nematic liquid crystal obtained from nuclear spin dipolar couplings by Monte Carlo sampling SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ORIENTATIONAL ORDER; ALKYL CHAINS; MOLECULES; ANGLE; FIELD AB Motionally averaged proton-proton dipolar couplings measured by nuclear magnetic resonance (NMR) spectroscopy can provide information about the conformations and orientations sampled by partially oriented molecules. In this study, the measured dipolar couplings between pairs of protons on n-hexane dissolved in a nematic liquid crystal solvent are used as constraints in a Monte Carlo sampling of the conformations and orientations of n-hexane. Rotation about each carbon-carbon bond in the molecule is modeled by the complete sinusoidal torsional potential of Ryckaert and Bellemans rather than by the three-state rotational isomeric states (RIS) model that has been used in previous studies. Comparison of the results of the simulations using the Ryckaert-Bellemans potential and the RIS model indicates little difference in the values of the adjustable parameters and the quality of the fits to the experimental data. The primary difference between the models appears in the calculated conformer probability distributions for n-hexane, highlighting the importance of the exact shape of the torsional potential used to model carbon-carbon bond rotation in organic molecules. C1 UNIV LJUBLJANA,JOZEF STEFAN INST,LJUBLJANA 61000,SLOVENIA. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP Luzar, M (reprint author), UNIV LJUBLJANA,DEPT PHYS,JADRANSKA 19,LJUBLJANA 61000,SLOVENIA. RI Caldarelli, Stefano/B-2750-2017 OI Caldarelli, Stefano/0000-0001-9008-9392 NR 24 TC 8 Z9 9 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 21 PY 1996 VL 100 IS 12 BP 5098 EP 5104 DI 10.1021/jp953271i PG 7 WC Chemistry, Physical SC Chemistry GA UB162 UT WOS:A1996UB16200057 ER PT J AU Albright, CH Nandi, S AF Albright, CH Nandi, S TI An explicit SO(10)xU(1)(F) model of the Yukawa interactions SO MODERN PHYSICS LETTERS A LA English DT Article ID GRAND UNIFIED THEORIES; SOLAR-NEUTRINO DATA; MASS MATRICES; INVARIANT FUNCTIONS; STANDARD MODEL; FERMION MASSES; QUARK; OSCILLATIONS; KAMIOKANDE; ANSATZ AB We construct an explicit SO(10) x U(1)(F) model of the Yukawa interactions by using as a guide previous phenomenological results obtained from a bottom-up approach to quark and lepton mass matrices. The U(1)(F) family symmetry group sets the textures for the Majorana and generic Dirac mass matrices by restricting the type and number of Higgs diagrams which can contribute to each matrix element, while the SO(10) group relates each particular element of the up, down, neutrino and charged lepton Dirac matrices. The Yukawa couplings and vacuum expectation values associated with pairs of 1, 45, 10 and 126 Higgs representations successfully correlate all the quark and lepton masses and mixings in the scenario incorporating the nonadiabatic solar neutrino and atmospheric neutrino depletion effects. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. OKLAHOMA STATE UNIV,DEPT PHYS,STILLWATER,OK 74078. RP Albright, CH (reprint author), NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115, USA. OI Albright, Carl/0000-0002-2252-6359 NR 49 TC 13 Z9 13 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE SN 0217-7323 J9 MOD PHYS LETT A JI Mod. Phys. Lett. A PD MAR 21 PY 1996 VL 11 IS 9 BP 737 EP 747 DI 10.1142/S0217732396000746 PG 11 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA UL338 UT WOS:A1996UL33800005 ER PT J AU Akesson, T Carling, H Dolgoshein, B Fabjan, CW Farthouat, P Froidevaux, D Funk, W Furletov, S Gavrilenko, I Holder, M Ivochkin, VG Jagielski, S Kondratiev, O Konovalov, S Konstantinov, A Kopitin, M Lichard, P Muraviev, S Nadtochi, AV Nevski, P Norton, PR Peshekhonov, V Polychronakos, VA Potekhin, M Radeka, V Richter, R Ramaniouk, A Saxon, DH Schegelsky, VA Shank, JT Shmeleva, A Smirnov, S Sosnovtsev, V Spiridenkov, EM Stavrianakou, M Stephani, D Tcherniatin, V Vassilieva, L Whitaker, JS Zaganidis, N AF Akesson, T Carling, H Dolgoshein, B Fabjan, CW Farthouat, P Froidevaux, D Funk, W Furletov, S Gavrilenko, I Holder, M Ivochkin, VG Jagielski, S Kondratiev, O Konovalov, S Konstantinov, A Kopitin, M Lichard, P Muraviev, S Nadtochi, AV Nevski, P Norton, PR Peshekhonov, V Polychronakos, VA Potekhin, M Radeka, V Richter, R Ramaniouk, A Saxon, DH Schegelsky, VA Shank, JT Shmeleva, A Smirnov, S Sosnovtsev, V Spiridenkov, EM Stavrianakou, M Stephani, D Tcherniatin, V Vassilieva, L Whitaker, JS Zaganidis, N TI Particle identification performance of a straw transition radiation tracker prototype SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID ENERGY-LOSS AB An 864 channel prototype of an integrated straw tracker and transition radiation detector for tracking and electron identification has been tested with and without magnetic field at the CERN SPS. The rejection against hadrons and converted photons has been measured and the dependence of the rejection power on detection parameters has been investigated. Tracking and hadron rejection were also studied in a high multiplicity environment. The results are compared with Monte Carlo simulations. Wherever possible, conclusions are drawn concerning the performance of a full-scale detector at the future Large Hadron Collider. C1 CERN,DIV PPE,CH-1211 GENEVA,SWITZERLAND. LUND UNIV,LUND,SWEDEN. MOSCOW ENGN PHYS INST,MOSCOW 115409,RUSSIA. UNIV SIEGEN,W-5900 SIEGEN,GERMANY. INST PHYS NUCL,ST PETERSBURG,RUSSIA. INST NUCL PHYS,KRAKOW,POLAND. ACAD MIN & MET,KRAKOW,POLAND. PN LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. JOINT INST NUCL RES,DUBNA,RUSSIA. BROOKHAVEN NATL LAB,UPTON,NY 11973. MAX PLANCK INST,MUNICH,GERMANY. UNIV GLASGOW,GLASGOW G61 1BD,LANARK,SCOTLAND. BOSTON UNIV,BOSTON,MA 02215. RI Gavrilenko, Igor/M-8260-2015; Konovalov, Serguei/M-9505-2015; vasilyeva, lidia/M-9569-2015; Smirnov, Sergei/F-1014-2011; Shmeleva, Alevtina/M-6199-2015 OI Smirnov, Sergei/0000-0002-6778-073X; NR 24 TC 11 Z9 11 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 21 PY 1996 VL 372 IS 1-2 BP 70 EP 84 PG 15 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UH445 UT WOS:A1996UH44500011 ER PT J AU Steinhaeuser, P Gutbrod, HH Kolb, BW Purschke, H Schmidt, HR Chen, W Kraner, H Li, Z Rehak, P AF Steinhaeuser, P Gutbrod, HH Kolb, BW Purschke, H Schmidt, HR Chen, W Kraner, H Li, Z Rehak, P TI Investigation of the properties of a radial silicon drift detector in the WA93-experiment SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID ION EXPERIMENT WA80; CALORIMETER; CERN AB A radial 3-inch silicon drift detector (SiDD), designed by Rehak, was used in the WA93 experiment to measure the production of charged particles and to determine detector characteristics for future applications with even higher multiplicities. Beside correlations with other detectors of the WA93 experiment, a Monte Carlo model and the results of a dedicated experiment with a test beam were used to interpret the S + Au 200 A GeV data. This paper describes the experimental setup and the methods used to extract the properties of the radial SiDD. C1 GESELL SCHWERIONENFORSCH MBH,D-64220 DARMSTADT,GERMANY. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 13 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 21 PY 1996 VL 372 IS 1-2 BP 85 EP 92 DI 10.1016/0168-9002(95)01245-1 PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UH445 UT WOS:A1996UH44500012 ER PT J AU Adams, D Bird, F Coupal, D Corden, MJ Xiao, D Estabrooks, P Ford, WT Hamatsu, R Kondoh, K Hanson, G Luehring, F Hubbard, B Lockman, WS OShaughnessy, K Lee, AM Zou, B Palounek, A Ziock, H Trilling, G AF Adams, D Bird, F Coupal, D Corden, MJ Xiao, D Estabrooks, P Ford, WT Hamatsu, R Kondoh, K Hanson, G Luehring, F Hubbard, B Lockman, WS OShaughnessy, K Lee, AM Zou, B Palounek, A Ziock, H Trilling, G TI Simulation studies of tracking systems at very high luminosity SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB Detailed computer simulation studies of a tracking detector originally designed for high luminosity operation at the Superconducting Super Collider have been carried out. Detector simulation and track reconstruction techniques appropriate to the extremely high charged particle rates corresponding to luminosities of up to 10(34) cm(-2) s(-1) are described. The detector performance is evaluated and compared to design requirements stemming from the physics goals of the SDC experiment. The results have implications for the design of tracking detectors at future high luminosity hadron colliders such as the Large Hadron Collider (LHC). C1 FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,TALLAHASSEE,FL 32306. RICE UNIV,BONNER NUCL LAB,HOUSTON,TX 77251. SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237. CARLETON UNIV,DEPT PHYS,OTTAWA,ON K1S 5B6,CANADA. UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309. TOKYO METROPOLITAN UNIV,DEPT PHYS,TOKYO,JAPAN. INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405. UNIV CALIF SANTA CRUZ,INST PARTICLE PHYS,SANTA CRUZ,CA 95064. DUKE UNIV,DEPT PHYS,DURHAM,NC 27706. LOS ALAMOS NATL LAB,LOS ALAMOS,NM. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 12 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 21 PY 1996 VL 372 IS 1-2 BP 160 EP 180 DI 10.1016/0168-9002(95)01276-1 PG 21 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UH445 UT WOS:A1996UH44500019 ER PT J AU Chen, YK Cooper, MD Cooper, PS Dzemidzic, M Gagliardi, CA Hogan, GE Hungerford, EV Kim, GJ Knott, JE Lan, KJ Liu, F Mayes, BW Mischke, RE Phelps, R Pinsky, LS Stantz, KM Szymanski, JJ Tang, LG Tribble, RE Tu, XL VanAusdeln, LA VonWitsch, W Wright, CS AF Chen, YK Cooper, MD Cooper, PS Dzemidzic, M Gagliardi, CA Hogan, GE Hungerford, EV Kim, GJ Knott, JE Lan, KJ Liu, F Mayes, BW Mischke, RE Phelps, R Pinsky, LS Stantz, KM Szymanski, JJ Tang, LG Tribble, RE Tu, XL VanAusdeln, LA VonWitsch, W Wright, CS TI Architecture of the MEGA detector trigger SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The trigger for the MEGA detector system is based on signals from single, high-energy photons interacting in one of the three MEGA pair spectrometers. The trigger is divided into a fast and a slow stage. The first stage produces a fast output if a specific pattern of detector hits is observed in the scintillators and high-speed wire chambers of a pair spectrometer. The second, slow-stage interrogates drift chamber hit patterns and provides a veto when the pattern fails a minimal requirement for reconstruction of the hits into a pair of circular orbits. The trigger interacts with the photon detector electronics by gating limited sections of the detector during the read-out of an event. This paper describes the two stage trigger system, the photon detector electronics, and the implementation of the trigger outputs to strobe the data acquisition system. The performance of the trigger is compared to Monte Carlo simulations of the photon detector response. C1 UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. FERMILAB NATL ACCELERATOR LAB,PHYS SECT,BATAVIA,IL 60510. TEXAS A&M UNIV,INST CYCLOTRON,COLLEGE STN,TX 77843. UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637. NR 7 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 21 PY 1996 VL 372 IS 1-2 BP 195 EP 206 DI 10.1016/0168-9002(95)01237-0 PG 12 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UH445 UT WOS:A1996UH44500022 ER PT J AU Reviol, W Jin, HQ Riedinger, LL AF Reviol, W Jin, HQ Riedinger, LL TI Transition energy staggering and band interaction in rare-earth nuclei SO PHYSICS LETTERS B LA English DT Article DE nuclear structure; properties of nuclei; rotational bands; moments of inertia; staggering of transition energies; band interaction; relation between deformation and superdeformation ID SPIN; SPECTROSCOPY; STATES AB Staggering of the transition energies E(gamma) and moments of inertia J((2)) for rotational bands in rare-earth nuclei is investigated by means of the higher order derivatives Delta(n)E(gamma) (n = 2,3,4). It is shown that these (Delta I = 2) staggering effects in the normally deformed bands are related to band interaction. The band interaction picture is also applied to staggering effects in superdeformed bands. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. RP Reviol, W (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 16 TC 23 Z9 23 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 MAR 21 PY 1996 VL 371 IS 1-2 BP 19 EP 24 DI 10.1016/0370-2693(95)01597-3 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UB860 UT WOS:A1996UB86000004 ER PT J AU Murayama, H Olechowski, M Pokorski, S AF Murayama, H Olechowski, M Pokorski, S TI Viable t-b-tau Yukawa unification in SUSY SO(10) SO PHYSICS LETTERS B LA English DT Article ID N=1 SUPERGRAVITY MODELS; GRAND UNIFIED THEORIES; SYMMETRY-BREAKING; SU(2)XU(1) BREAKING; MASSES; SPECTRUM AB The supersymmetric SO(10) GUT with t-b-tau Yukawa coupling unification has problems with correct electroweak symmetry breaking, experimental constraints (especially b --> sy) and neutralino abundance, if the scalar masses are universal at the GUT scale. We point out that non-universality of the scalar masses at the GUT scale generated both by (1) renormalization group running from the Planck scale to the GUT scale and (2) D-term contribution induced by the reduction of the rank of the gauge group, has a desirable pattern to make the model phemenologically viable (in fact the only one which is consistent with experimental and cosmological constraints). At the same time the top quark mass has to be either close to its quasi TR-fixed point value or below similar to 170 GeV. We also briefly discuss the spectrum of superpartners which is then obtained. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. IST NAZL FIS NUCL,SEZ TORINO,I-10125 TURIN,ITALY. MAX PLANCK INST PHYS & ASTROPHYS,D-80805 MUNICH,GERMANY. RP Murayama, H (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Murayama, Hitoshi/A-4286-2011 NR 44 TC 61 Z9 61 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD MAR 21 PY 1996 VL 371 IS 1-2 BP 57 EP 64 DI 10.1016/0370-2693(95)01611-2 PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UB860 UT WOS:A1996UB86000010 ER PT J AU Acciarri, M Adam, A Adriani, O AguilarBenitez, M Ahlen, S Alpat, B Alcaraz, J Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Antreasyan, D Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Ball, RC Banerjee, S Banicz, K Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Battiston, R Bay, A Becattini, F Becker, U Behner, F Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biasini, M Biland, A Bilei, GM Blaising, JJ Bobbink, GJ Bock, R Bohm, A Borgia, B Boucham, A Bourilkov, D Bourquin, M Boutigny, D Brambilla, E Branson, JG Brigljevic, V Brock, IC Buijs, A Bujak, A Burger, JD Burger, WJ Burgos, C Busenitz, J Buytenhuijs, A Cai, XD Campanelli, M Capell, M Romeo, GC Caria, M Carlino, G Cartacci, AM Casaus, J Castellini, G Castello, R Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chan, A Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, G Chen, GM Chen, HF Chen, HS Chen, M Chereau, X Chiefari, G Chien, CY Choi, MT Cifarelli, L Cindolo, F Cohn, HO Coignet, G Colijn, AP Civinini, C Clare, I Clare, R Coan, TE Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Dai, TS DAlessandro, R deAsmundis, R DeBoeck, H Degre, A Deiters, K Denes, E Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dorne, I Dova, MT Drago, E Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabbretti, R Fabre, M Faccini, R Falciano, S Favara, A Fay, J Felcini, M Ferguson, T Fernandez, D Fernandez, G Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Forconi, G Fredj, L Freudenreich, K Gailloud, M Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gerald, J Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZE Gonzalez, E Gougas, A Goujon, D Gratta, G Gruenewald, MW Gupta, VK Gurtu, A Gustafson, HR Gutay, LJ Hartmann, B Hasan, A He, JT Hebbeker, T Herve, A Hilgers, K vanHoek, WC Hofer, H Hoorani, H Hou, SR Hu, G Ilyas, MM Innocente, V Janssen, H Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamyshkov, Y Kapinos, P Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, JK Kim, SC Kim, YG Kinnison, WW Kirkby, A Kirkby, D Kirkby, J Kittel, W Klimentov, A Konig, AC Koffeman, E Kornadt, O Koutsenko, V Koulbardis, A Kraemer, RW Kramer, T Krenz, W Kuijten, H Kunin, A deGuevara, PL Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P Lee, JS Lee, KY Leggett, C LeGoff, JM Leiste, R Lenti, M Leonardi, E Levtchenko, P Li, C Lieb, E Lin, WT Linde, FL Lindemann, B Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Ludovici, L Luminari, L Lustermann, W Ma, WG Macchiolo, A Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangla, S Maolinbay, M Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG Mazumdar, K McNally, D Mele, S Merola, L Meschini, M Metzger, WJ Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Moller, M Monteleoni, B Moore, R Morganti, S Mount, R Muller, S Muheim, F Nagy, E Nahn, S Napolitano, M NessiTedaldi, F Newman, H Nippe, A Nowak, H Organtini, G Ostonen, R Pandoulas, D Paoletti, S Paolucci, P Pascale, G Passaleva, G Patricelli, S Paul, T Pauluzzi, M Paus, C Pauss, F Pei, YJ Pensotti, S PerretGallix, D Petrak, S Pevsner, A Piccolo, D Pieri, M Pinto, JC Piroue, PA Pistolesi, E Plyaskin, V Pohl, M Pojidaev, V Postema, H Produit, N Raghavan, R RahalCallot, G Rancoita, PG Rattaggi, M Raven, G Razis, P Read, K Redaelli, M Ren, D Rescigno, M Reucroft, S Ricker, A Riemann, S Riemers, BC Riles, K Rind, O Ro, S Robohm, A Rodin, J Rodriguez, FJ Roe, BP Rohner, M Rohner, S Romero, L RosierLees, S Rosselet, P vanRossum, W Roth, S Rubio, JA Rykaczewski, H Salicio, J Salicio, JM Sanchez, E Santocchia, A Sarakinos, ME Sarkar, S Sassowsky, M Sauvage, G Schafer, C Schegelsky, V Schmitz, D Schmitz, P Schneegans, M Schoeneich, B Scholz, N Schopper, H Schotanus, DJ Schulte, R Schultze, K Schwenke, J Schwering, G Sciacca, C Seiler, PG Sens, JC Servoli, L Shevchenko, S Shivarov, N Shoutko, V Shukla, J Shumilov, E Son, D Sopczak, A Soulimov, V Smith, B Spickermann, T Spillantini, P Steuer, M Stickland, DP Sticozzi, F Stone, H Stoyanov, B Strauch, K Sudhakar, K Sultanov, G Sun, LZ Susinno, GF Suter, H Swain, JD Tang, XW Tauscher, L Taylor, L Ting, SCC Ting, SM Toker, O Tonisch, F Tonutti, M Tonwar, SC Toth, J Tsaregorodtsev, A Tsipolitis, G Tully, C Tuchscherer, H Ulbricht, J Urban, L Uwer, U Valente, E vandeWalle, RT Vetlitsky, I Viertel, G Vivargent, M Volkert, R Vogel, H Vogt, H Vorobiev, I Vorobyov, AA Vorobyov, AA Vuilleumier, L Wadhwa, M Wallraff, W Wang, JC Wang, XL Wang, YF Wang, ZM Weber, A Weill, R Willmott, C Wittgenstein, E Wu, SX Wynhoff, S Xu, J Xu, ZZ Yang, BZ Yang, CG Yao, XY Ye, JB Yeh, SC You, JM Zaccardelli, C Zalite, A Zemp, P Zeng, JY Zeng, Y Zhang, Z Zhang, ZP Zhou, B Zhou, GJ Zhou, JF Zhou, Y Zhu, GY Zhu, RY Zichichi, A vanderZwaan, BCC AF Acciarri, M Adam, A Adriani, O AguilarBenitez, M Ahlen, S Alpat, B Alcaraz, J Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Antreasyan, D Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Ball, RC Banerjee, S Banicz, K Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Battiston, R Bay, A Becattini, F Becker, U Behner, F Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biasini, M Biland, A Bilei, GM Blaising, JJ Bobbink, GJ Bock, R Bohm, A Borgia, B Boucham, A Bourilkov, D Bourquin, M Boutigny, D Brambilla, E Branson, JG Brigljevic, V Brock, IC Buijs, A Bujak, A Burger, JD Burger, WJ Burgos, C Busenitz, J Buytenhuijs, A Cai, XD Campanelli, M Capell, M Romeo, GC Caria, M Carlino, G Cartacci, AM Casaus, J Castellini, G Castello, R Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chan, A Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, G Chen, GM Chen, HF Chen, HS Chen, M Chereau, X Chiefari, G Chien, CY Choi, MT Cifarelli, L Cindolo, F Cohn, HO Coignet, G Colijn, AP Civinini, C Clare, I Clare, R Coan, TE Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Dai, TS DAlessandro, R deAsmundis, R DeBoeck, H Degre, A Deiters, K Denes, E Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dorne, I Dova, MT Drago, E Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabbretti, R Fabre, M Faccini, R Falciano, S Favara, A Fay, J Felcini, M Ferguson, T Fernandez, D Fernandez, G Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Forconi, G Fredj, L Freudenreich, K Gailloud, M Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gerald, J Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZE Gonzalez, E Gougas, A Goujon, D Gratta, G Gruenewald, MW Gupta, VK Gurtu, A Gustafson, HR Gutay, LJ Hartmann, B Hasan, A He, JT Hebbeker, T Herve, A Hilgers, K vanHoek, WC Hofer, H Hoorani, H Hou, SR Hu, G Ilyas, MM Innocente, V Janssen, H Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamyshkov, Y Kapinos, P Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, JK Kim, SC Kim, YG Kinnison, WW Kirkby, A Kirkby, D Kirkby, J Kittel, W Klimentov, A Konig, AC Koffeman, E Kornadt, O Koutsenko, V Koulbardis, A Kraemer, RW Kramer, T Krenz, W Kuijten, H Kunin, A deGuevara, PL Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P Lee, JS Lee, KY Leggett, C LeGoff, JM Leiste, R Lenti, M Leonardi, E Levtchenko, P Li, C Lieb, E Lin, WT Linde, FL Lindemann, B Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Ludovici, L Luminari, L Lustermann, W Ma, WG Macchiolo, A Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangla, S Maolinbay, M Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG Mazumdar, K McNally, D Mele, S Merola, L Meschini, M Metzger, WJ Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Moller, M Monteleoni, B Moore, R Morganti, S Mount, R Muller, S Muheim, F Nagy, E Nahn, S Napolitano, M NessiTedaldi, F Newman, H Nippe, A Nowak, H Organtini, G Ostonen, R Pandoulas, D Paoletti, S Paolucci, P Pascale, G Passaleva, G Patricelli, S Paul, T Pauluzzi, M Paus, C Pauss, F Pei, YJ Pensotti, S PerretGallix, D Petrak, S Pevsner, A Piccolo, D Pieri, M Pinto, JC Piroue, PA Pistolesi, E Plyaskin, V Pohl, M Pojidaev, V Postema, H Produit, N Raghavan, R RahalCallot, G Rancoita, PG Rattaggi, M Raven, G Razis, P Read, K Redaelli, M Ren, D Rescigno, M Reucroft, S Ricker, A Riemann, S Riemers, BC Riles, K Rind, O Ro, S Robohm, A Rodin, J Rodriguez, FJ Roe, BP Rohner, M Rohner, S Romero, L RosierLees, S Rosselet, P vanRossum, W Roth, S Rubio, JA Rykaczewski, H Salicio, J Salicio, JM Sanchez, E Santocchia, A Sarakinos, ME Sarkar, S Sassowsky, M Sauvage, G Schafer, C Schegelsky, V Schmitz, D Schmitz, P Schneegans, M Schoeneich, B Scholz, N Schopper, H Schotanus, DJ Schulte, R Schultze, K Schwenke, J Schwering, G Sciacca, C Seiler, PG Sens, JC Servoli, L Shevchenko, S Shivarov, N Shoutko, V Shukla, J Shumilov, E Son, D Sopczak, A Soulimov, V Smith, B Spickermann, T Spillantini, P Steuer, M Stickland, DP Sticozzi, F Stone, H Stoyanov, B Strauch, K Sudhakar, K Sultanov, G Sun, LZ Susinno, GF Suter, H Swain, JD Tang, XW Tauscher, L Taylor, L Ting, SCC Ting, SM Toker, O Tonisch, F Tonutti, M Tonwar, SC Toth, J Tsaregorodtsev, A Tsipolitis, G Tully, C Tuchscherer, H Ulbricht, J Urban, L Uwer, U Valente, E vandeWalle, RT Vetlitsky, I Viertel, G Vivargent, M Volkert, R Vogel, H Vogt, H Vorobiev, I Vorobyov, AA Vorobyov, AA Vuilleumier, L Wadhwa, M Wallraff, W Wang, JC Wang, XL Wang, YF Wang, ZM Weber, A Weill, R Willmott, C Wittgenstein, E Wu, SX Wynhoff, S Xu, J Xu, ZZ Yang, BZ Yang, CG Yao, XY Ye, JB Yeh, SC You, JM Zaccardelli, C Zalite, A Zemp, P Zeng, JY Zeng, Y Zhang, Z Zhang, ZP Zhou, B Zhou, GJ Zhou, JF Zhou, Y Zhu, GY Zhu, RY Zichichi, A vanderZwaan, BCC TI Measurement of eta production in two and three-jet events from hadronic Z decays at LEP SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; SQUARE-ROOT-S; MESON PRODUCTION; L3 EXPERIMENT; E+E-PHYSICS; FRAGMENTATION; ANNIHILATION; PI-0 AB The inclusive production of eta mesons has been studied using 1.6 million hadronic Z decays collected with the L3 detector. The eta multiplicity per event, the multiplicity for two-jet and three-jet events separately, and the multiplicity in each jet have been measured and compared with the predictions of different Monte Carlo programs. The momentum spectra of eta in each jet have also been measured, We observe that the measured eta momentum spectrum in quark-enriched jets agrees well with the Monte Carlo prediction while in gluon-enriched jets it is harder than that predicted by the Monte Carlo models. C1 RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY. NIKHEF H, NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS. UNIV AMSTERDAM, 1009 DB AMSTERDAM, NETHERLANDS. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. LAB ANNECY VIEUX PHYS PARTICLES, IN2P3, CNRS, F-74941 ANNECY LE VIEUX, FRANCE. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND. INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA. HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA. BOSTON UNIV, BOSTON, MA 02215 USA. NORTHEASTERN UNIV, BOSTON, MA 02115 USA. INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA. UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA. HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY. HARVARD UNIV, CAMBRIDGE, MA 02139 USA. MIT, CAMBRIDGE, MA 02139 USA. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. UNIV FLORENCE, I-50125 FLORENCE, ITALY. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND. UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND. CHINESE UNIV SCI & TECHNOL, USTC, HEFEI 230029, ANHUI, PEOPLES R CHINA. RES INST HIGH ENERGY PHYS, SEFT, SF-00014 HELSINKI, FINLAND. UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV LYON 1, CNRS, IN2P3, INST PHYS NUCL LYON, F-69622 VILLEURBANNE, FRANCE. CIEMAT, E-28040 MADRID, SPAIN. INST THEORET & EXPTL PHYS, MOSCOW, RUSSIA. UNIV NAPLES, I-80125 NAPLES, ITALY. IST NAZL FIS NUCL, I-80125 NAPLES, ITALY. UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS. UNIV NYMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. CALTECH, PASADENA, CA 91125 USA. UNIV PERUGIA, I-06100 PERUGIA, ITALY. IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. PRINCETON UNIV, PRINCETON, NJ 08544 USA. IST NAZL FIS NUCL, I-00185 ROME, ITALY. UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY. INST PHYS NUCL, ST PETERSBURG, RUSSIA. UNIV SALERNO, I-84100 SALERNO, ITALY. IST NAZL FIS NUCL, I-84100 SALERNO, ITALY. UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92093 USA. UNIV SANTIAGO, DEPT FIS PARTICLAS ELEMENTALES, E-15706 SANTIAGO, SPAIN. BULGARIAN ACAD SCI, CENT LAB MECHATRON & INSTRUMENTAT, BU-1113 SOFIA, BULGARIA. KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA. UNIV ALABAMA, TUSCALOOSA, AL 35486 USA. UNIV UTRECHT, 3584 CB UTRECHT, NETHERLANDS. NIKHEF H, 3584 CB UTRECHT, NETHERLANDS. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND. DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY. ETH ZURICH, CH-8093 ZURICH, SWITZERLAND. UNIV HAMBURG, D-22761 HAMBURG, GERMANY. RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY. RP IST NAZL FIS NUCL, I-20133 MILAN, ITALY. RI Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015; van der Zwaan, Bob/F-4070-2015; D'Alessandro, Raffaello/F-5897-2015; Sanchez, Eusebio/H-5228-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge, francisco javier/H-9682-2015; Rancoita, Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Roth, Stefan/J-2757-2016; Kamyshkov, Yuri/J-7999-2016; de la Cruz, Begona/K-7552-2014; Josa, Isabel/K-5184-2014; Gonzalez Romero, Enrique/L-7561-2014; Vogel, Helmut/N-8882-2014; Fiandrini, Emanuele/C-4549-2008; Lista, Luca/C-5719-2008; Ludovici, Lucio/F-5917-2011; Kirkby, Jasper/A-4973-2012; Servoli, Leonello/E-6766-2012; alpat, ali behcet/G-6290-2013; bertucci, bruna/J-5237-2012; Cavallo, Nicola/F-8913-2012; Cerrada, Marcos/J-6934-2014 OI Filthaut, Frank/0000-0003-3338-2247; Goldstein, Joel/0000-0003-1591-6014; Ferguson, Thomas/0000-0001-5822-3731; Berdugo, Javier/0000-0002-7911-8532; van der Zwaan, Bob/0000-0001-5871-7643; D'Alessandro, Raffaello/0000-0001-7997-0306; Sanchez, Eusebio/0000-0002-9646-8198; Rancoita, Pier Giorgio/0000-0002-1990-4283; Roth, Stefan/0000-0003-3616-2223; Kamyshkov, Yuri/0000-0002-3789-7152; Gonzalez Romero, Enrique/0000-0003-2376-8920; Vogel, Helmut/0000-0002-6109-3023; Ludovici, Lucio/0000-0003-1970-9960; Kirkby, Jasper/0000-0003-2341-9069; Servoli, Leonello/0000-0003-1725-9185; alpat, ali behcet/0000-0002-0116-1506; Cerrada, Marcos/0000-0003-0112-1691 NR 33 TC 19 Z9 19 U1 1 U2 3 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 MAR 21 PY 1996 VL 371 IS 1-2 BP 126 EP 136 DI 10.1016/0370-2693(96)00095-0 PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UB860 UT WOS:A1996UB86000021 ER PT J AU Acciarri, M Adam, A Adriani, O AguilarBenitez, M Ahlen, S Alpat, B Alcaraz, J Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Antreasyan, D Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Ball, RC Banerjee, S Banicz, K Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Battiston, R Bay, A Becattini, F Becker, U Behner, F Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biasini, M Biland, A Bilei, GM Blaising, JJ Blyth, SC Bobbink, GJ Bock, R Bohm, A Borgia, B Boucham, A Bourilkov, D Bourquin, M Boutigny, D Brambilla, E Branson, JG Brigljevic, V Brock, IC Buijs, A Bujak, A Burger, JD Burger, WJ Burgos, C Busenitz, J Buytenhuijs, A Cai, XD Campanelli, M Capell, M Romeo, GC Caria, M Carlino, G Cartacci, AM Casaus, J Castellini, G Castello, R Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chan, A Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, G Chen, GM Chen, HF Chen, HS Chereau, X Chiefari, G Chien, CY Choi, MT Cifarelli, L Cindolo, F Civinini, C Clare, I Clare, R Coan, TE Cohn, HO Coignet, G Colijn, AP Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Dai, TS DAlessandro, R deAsmundis, R DeBoeck, H Degre, A Deiters, K Denes, E Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dorne, I Dova, MT Drago, E Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabbretti, R Fabre, M Faccini, R Falciano, S Favara, A Fay, J Felcini, M Ferguson, T Fernandez, D Fernandez, G Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Forconi, G Fredj, L Freudenreich, K Gailloud, M Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gerald, J Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZF Gonzalez, E Gougas, A Goujon, D Gratta, G Gruenewald, MW Gupta, VK Gurtu, A Gustafson, HR Gutay, LJ Hangarter, K Hartmann, B Hasan, A He, JT Hebbeker, T Herve, A vanHoek, WC Hofer, H Hoorani, H Hou, SR Hu, G Ilyas, MM Innocente, V Janssen, H Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamyshkov, Y Kapinos, P Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, JK Kim, SC Kim, YG Kinnison, WW Kirkby, A Kirkby, D Kirkby, J Kittel, W Klimentov, A Konig, AC Koffeman, E Kongeter, A Koutsenko, V Koulbardis, A Kraemer, RW Kramer, T Krenz, W Kuijten, H Kunin, A deGuevara, PL Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P Lee, JS Lee, KY Leggett, C LeGoff, JM Leiste, R Lenti, M Leonardi, E Levtchenko, P Li, C Lieb, E Lin, WT Linde, FL Lindemann, B Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Ludovici, L Luminari, L Lustermann, W Ma, WG Macchiolo, A Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangla, S Maolinbay, M Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG Mazumdar, K McNally, D McNeil, RR Mele, S Merola, L Meschini, M Metzger, WJ vonderMey, M Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Moller, M Monteleoni, B Moore, R Morganti, S Mount, R Muller, S Muheim, F Nagy, E Nahn, S Napolitano, M NessiTedaldi, F Newman, H Nippe, A Nowak, H Organtini, G Ostonen, R Pandoulas, D Paoletti, S Paolucci, P Park, HK Pascale, G Passaleva, G Patricelli, S Paul, T Pauluzzi, M Paus, C Pauss, F Pei, YJ Pensotti, S PerretGallix, D Petrak, S Pevsner, A Piccolo, D Pieri, M Pinto, JC Piroue, PA Pistolesi, E Plyaskin, V Pohl, M Pojidaev, V Postema, H Produit, N Raghavan, R RahalCallot, G Rancoita, PG Rattaggi, M Raven, G Razis, P Read, K Redaelli, M Den, D Rescigno, M Reucroft, S Ricker, A Riemann, S Riemers, BC Riles, K Rind, O Ro, S Robohm, S Rodin, J Rodriguez, FJ Roe, BP Rohner, S Romero, L RosierLees, S Rosselet, P vanRossum, W Roth, S Rubio, JA Rykaczewski, H Salicio, J Salicio, JM Sanchez, E Santocchia, A Sarakinos, ME Sarkar, S Sassowsky, M Schafer, C Schegelsky, V SchmidtKaerst, S Schmitz, D Schmitz, P Schneegans, M Schoeneich, B Scholz, N Schopper, H Schotanus, DJ Schulte, R Schultze, K Schwenke, J Schwering, G Sciacca, C Seiler, PG Sens, JC Servoli, L Shevchenko, S Shivarov, N Shoutko, V Shukla, J Shumilov, E Siedenburg, T Son, D Sopczak, A Soulimov, V Smith, B Spillantini, P Steuer, M Stickland, DP Sticozzi, F Stone, H Stoyanov, B Straessner, A Strauch, K Sudhakar, K Sultanov, G Sun, LZ Susinno, GF Suter, H Swain, JD Tang, XW Tauscher, L Taylor, L Ting, SCC Ting, SM Toker, O Tonisch, F Tonutti, M Tonwar, SC Toth, J Tsaregorodtsev, A Tully, C Tuchscherer, H Tung, KL Ulbricht, J Urban, L Uwer, U Valente, E VandeWalle, RT Vetlitsky, I Viertel, G Vivargent, M Volkert, R Vogel, H Vogt, H Vorobiev, I Vorobyov, AA Vorobyov, AA Vuilleumier, L Wadhwa, M Wallraff, W Wang, JC Wang, XL Wang, YF Wang, ZM Weber, A Weill, R Willmott, C Wittgenstein, F Wu, SX Wynhoff, S Xu, J Xu, ZZ Yang, BZ Yang, CG Yao, XY Ye, JB Yeh, SC You, JM Zaccardelli, C Zalite, A Zemp, P Zeng, JY Zeng, Y Zhang, Z Zhang, ZP Zhou, B Zhou, GJ Zhou, Y Zhu, GY Zhu, RY Zichichi, A vanderZwaan, BCC AF Acciarri, M Adam, A Adriani, O AguilarBenitez, M Ahlen, S Alpat, B Alcaraz, J Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Antreasyan, D Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Ball, RC Banerjee, S Banicz, K Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Battiston, R Bay, A Becattini, F Becker, U Behner, F Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biasini, M Biland, A Bilei, GM Blaising, JJ Blyth, SC Bobbink, GJ Bock, R Bohm, A Borgia, B Boucham, A Bourilkov, D Bourquin, M Boutigny, D Brambilla, E Branson, JG Brigljevic, V Brock, IC Buijs, A Bujak, A Burger, JD Burger, WJ Burgos, C Busenitz, J Buytenhuijs, A Cai, XD Campanelli, M Capell, M Romeo, GC Caria, M Carlino, G Cartacci, AM Casaus, J Castellini, G Castello, R Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chan, A Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, G Chen, GM Chen, HF Chen, HS Chereau, X Chiefari, G Chien, CY Choi, MT Cifarelli, L Cindolo, F Civinini, C Clare, I Clare, R Coan, TE Cohn, HO Coignet, G Colijn, AP Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Dai, TS DAlessandro, R deAsmundis, R DeBoeck, H Degre, A Deiters, K Denes, E Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dorne, I Dova, MT Drago, E Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabbretti, R Fabre, M Faccini, R Falciano, S Favara, A Fay, J Felcini, M Ferguson, T Fernandez, D Fernandez, G Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Forconi, G Fredj, L Freudenreich, K Gailloud, M Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gerald, J Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZF Gonzalez, E Gougas, A Goujon, D Gratta, G Gruenewald, MW Gupta, VK Gurtu, A Gustafson, HR Gutay, LJ Hangarter, K Hartmann, B Hasan, A He, JT Hebbeker, T Herve, A vanHoek, WC Hofer, H Hoorani, H Hou, SR Hu, G Ilyas, MM Innocente, V Janssen, H Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamyshkov, Y Kapinos, P Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, JK Kim, SC Kim, YG Kinnison, WW Kirkby, A Kirkby, D Kirkby, J Kittel, W Klimentov, A Konig, AC Koffeman, E Kongeter, A Koutsenko, V Koulbardis, A Kraemer, RW Kramer, T Krenz, W Kuijten, H Kunin, A deGuevara, PL Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P Lee, JS Lee, KY Leggett, C LeGoff, JM Leiste, R Lenti, M Leonardi, E Levtchenko, P Li, C Lieb, E Lin, WT Linde, FL Lindemann, B Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Ludovici, L Luminari, L Lustermann, W Ma, WG Macchiolo, A Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangla, S Maolinbay, M Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG Mazumdar, K McNally, D McNeil, RR Mele, S Merola, L Meschini, M Metzger, WJ vonderMey, M Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Moller, M Monteleoni, B Moore, R Morganti, S Mount, R Muller, S Muheim, F Nagy, E Nahn, S Napolitano, M NessiTedaldi, F Newman, H Nippe, A Nowak, H Organtini, G Ostonen, R Pandoulas, D Paoletti, S Paolucci, P Park, HK Pascale, G Passaleva, G Patricelli, S Paul, T Pauluzzi, M Paus, C Pauss, F Pei, YJ Pensotti, S PerretGallix, D Petrak, S Pevsner, A Piccolo, D Pieri, M Pinto, JC Piroue, PA Pistolesi, E Plyaskin, V Pohl, M Pojidaev, V Postema, H Produit, N Raghavan, R RahalCallot, G Rancoita, PG Rattaggi, M Raven, G Razis, P Read, K Redaelli, M Den, D Rescigno, M Reucroft, S Ricker, A Riemann, S Riemers, BC Riles, K Rind, O Ro, S Robohm, S Rodin, J Rodriguez, FJ Roe, BP Rohner, S Romero, L RosierLees, S Rosselet, P vanRossum, W Roth, S Rubio, JA Rykaczewski, H Salicio, J Salicio, JM Sanchez, E Santocchia, A Sarakinos, ME Sarkar, S Sassowsky, M Schafer, C Schegelsky, V SchmidtKaerst, S Schmitz, D Schmitz, P Schneegans, M Schoeneich, B Scholz, N Schopper, H Schotanus, DJ Schulte, R Schultze, K Schwenke, J Schwering, G Sciacca, C Seiler, PG Sens, JC Servoli, L Shevchenko, S Shivarov, N Shoutko, V Shukla, J Shumilov, E Siedenburg, T Son, D Sopczak, A Soulimov, V Smith, B Spillantini, P Steuer, M Stickland, DP Sticozzi, F Stone, H Stoyanov, B Straessner, A Strauch, K Sudhakar, K Sultanov, G Sun, LZ Susinno, GF Suter, H Swain, JD Tang, XW Tauscher, L Taylor, L Ting, SCC Ting, SM Toker, O Tonisch, F Tonutti, M Tonwar, SC Toth, J Tsaregorodtsev, A Tully, C Tuchscherer, H Tung, KL Ulbricht, J Urban, L Uwer, U Valente, E VandeWalle, RT Vetlitsky, I Viertel, G Vivargent, M Volkert, R Vogel, H Vogt, H Vorobiev, I Vorobyov, AA Vorobyov, AA Vuilleumier, L Wadhwa, M Wallraff, W Wang, JC Wang, XL Wang, YF Wang, ZM Weber, A Weill, R Willmott, C Wittgenstein, F Wu, SX Wynhoff, S Xu, J Xu, ZZ Yang, BZ Yang, CG Yao, XY Ye, JB Yeh, SC You, JM Zaccardelli, C Zalite, A Zemp, P Zeng, JY Zeng, Y Zhang, Z Zhang, ZP Zhou, B Zhou, GJ Zhou, Y Zhu, GY Zhu, RY Zichichi, A vanderZwaan, BCC TI Study of the structure of hadronic events and determination of alpha(s) at root s=130 GeV and 136 GeV SO PHYSICS LETTERS B LA English DT Article ID CHARGED-PARTICLE MULTIPLICITIES; LUND MONTE-CARLO; E+E-ANNIHILATION; JET FRAGMENTATION; PETRA ENERGIES; L3 EXPERIMENT; QCD MODELS; DECAYS; Z0; DISTRIBUTIONS AB We present a study of the structure of hadronic events recorded by the L3 detector at center-of-mass energies of 130 and 136 GeV. The data sample corresponds to an integrated luminosity of 5 pb(-1) collected during the high energy run of 1995. The shapes of the event shape distributions and the energy dependence of their mean values are well reproduced by QCD models. From a comparison of the data with resummed O(alpha(s)(2)) QCD calculations, we determine the strong coupling constant to be alpha(s)(133 GeV) = 0.107 +/- 0.005(exp) +/- 0.006(theor). C1 RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY. NIKHEF H, NATL HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS. UNIV AMSTERDAM, 1009 DB AMSTERDAM, NETHERLANDS. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. LAB ANNECY LE VIEUX PHYS PARTICULES, IN2P3, CNRS, F-74941 ANNECY LE VIEUX, FRANCE. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND. LOUISIANA STATE UNIV, BATON ROUGE, LA 70803 USA. INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA. HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY. IST NAZL FIS NUCL, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY. TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA. BOSTON UNIV, BOSTON, MA 02215 USA. NORTHEASTERN UNIV, BOSTON, MA 02115 USA. INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA. UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA. HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST, HUNGARY. HARVARD UNIV, CAMBRIDGE, MA 02139 USA. MIT, CAMBRIDGE, MA 02139 USA. UNIV FLORENCE, I-50125 FLORENCE, ITALY. IST NAZL FIS NUCL, SEZ FIRENZE, I-50125 FLORENCE, ITALY. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND. UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND. CHINESE UNIV SCI & TECHNOL, USTC, HEFEI 230029, ANHUI, PEOPLES R CHINA. RES INST HIGH ENERGY PHYS, SEFT, SF-00014 HELSINKI, FINLAND. UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND. IST NAZL FIS NUCL, I-73100 LECCE, ITALY. UNIV LECCE, I-73100 LECCE, ITALY. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV LYON 1, CNRS, IN2P3, INST PHYS NUCL LYON, F-69622 PARIS, FRANCE. CIEMAT, E-28040 MADRID, SPAIN. IST NAZL FIS NUCL, SEZ MILANO, I-20133 MILAN, ITALY. INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA. IST NAZL FIS NUCL, I-80125 NAPLES, ITALY. UNIV NAPLES, I-80125 NAPLES, ITALY. UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS. UNIV NYMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. CALTECH, PASADENA, CA 91125 USA. IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY. UNIV PERUGIA, I-06100 PERUGIA, ITALY. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. PRINCETON UNIV, PRINCETON, NJ 08544 USA. IST NAZL FIS NUCL, I-00185 ROME, ITALY. UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY. INST PHYS NUCL, ST PETERSBURG, RUSSIA. UNIV SALERNO, I-84100 SALERNO, ITALY. IST NAZL FIS NUCL, I-84100 SALERNO, ITALY. UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92093 USA. UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN. BULGARIAN ACAD SCI, CENT LAB MECHATRON & INSTRUMENTAT, BU-1113 SOFIA, BULGARIA. KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA. UNIV ALABAMA, TUSCALOOSA, AL 35486 USA. UNIV UTRECHT, 3584 CB UTRECHT, NETHERLANDS. NIKHEF H, 3584 CB UTRECHT, NETHERLANDS. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND. DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY. ETH ZURICH, CH-8093 ZURICH, SWITZERLAND. UNIV HAMBURG, D-22761 HAMBURG, GERMANY. RP RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY. RI Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015; van der Zwaan, Bob/F-4070-2015; D'Alessandro, Raffaello/F-5897-2015; Sanchez, Eusebio/H-5228-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge, francisco javier/H-9682-2015; Rancoita, Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Roth, Stefan/J-2757-2016; Kamyshkov, Yuri/J-7999-2016; Ludovici, Lucio/F-5917-2011; Kirkby, Jasper/A-4973-2012; Servoli, Leonello/E-6766-2012; alpat, ali behcet/G-6290-2013; bertucci, bruna/J-5237-2012; Cavallo, Nicola/F-8913-2012; Cerrada, Marcos/J-6934-2014; de la Cruz, Begona/K-7552-2014; Josa, Isabel/K-5184-2014; Gonzalez Romero, Enrique/L-7561-2014; Vogel, Helmut/N-8882-2014; Fiandrini, Emanuele/C-4549-2008; Lista, Luca/C-5719-2008 OI Ferguson, Thomas/0000-0001-5822-3731; Berdugo, Javier/0000-0002-7911-8532; van der Zwaan, Bob/0000-0001-5871-7643; D'Alessandro, Raffaello/0000-0001-7997-0306; Sanchez, Eusebio/0000-0002-9646-8198; Rancoita, Pier Giorgio/0000-0002-1990-4283; Roth, Stefan/0000-0003-3616-2223; Kamyshkov, Yuri/0000-0002-3789-7152; Ludovici, Lucio/0000-0003-1970-9960; Kirkby, Jasper/0000-0003-2341-9069; Servoli, Leonello/0000-0003-1725-9185; alpat, ali behcet/0000-0002-0116-1506; Cerrada, Marcos/0000-0003-0112-1691; Gonzalez Romero, Enrique/0000-0003-2376-8920; Vogel, Helmut/0000-0002-6109-3023; NR 63 TC 61 Z9 61 U1 1 U2 6 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 MAR 21 PY 1996 VL 371 IS 1-2 BP 137 EP 148 DI 10.1016/0370-2693(96)00096-2 PG 12 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UB860 UT WOS:A1996UB86000022 ER PT J AU Abe, K Abt, I Ahn, CJ Akagi, T Allen, NJ Ash, WW Aston, D Baird, KG Baltay, C Band, HR Barakat, MB Baranko, G Bardon, O Barklow, T Bazarko, AO BenDavid, R Benvenuti, AC Bilei, GM Bisello, D Blaylock, G Bogart, JR Bolton, T Bower, GR Brau, JE Breidenbach, M Bugg, WM Burke, D Burnett, TH Burrows, PN Busza, W Calcaterra, A Caldwell, DO Calloway, D Camanzi, B Carpinelli, M Cassell, R Castaldi, R Castro, A CavalliSforza, M Chou, A Church, E Cohn, HO Coller, JA Cook, V Cotton, R Cowan, RF Coyne, DG Crawford, G DOliveira, A Damerell, CJS Daoudi, M DeSangro, R DeSimone, P DellOrso, R Dima, M Du, PYC Dubois, R Eisenstein, BI Elia, R Etzion, E Falciai, D Fan, C Fero, MJ Frey, R Furuno, K Gillman, T Gladding, G Gonzalez, S Hallewell, GD Hart, EL Hasan, A Hasegawa, Y Hasuko, K Hedges, S Hertzbach, SS Hildreth, MD Huber, J Huffer, ME Hughes, EW Hwang, H Iwasaki, Y Jackson, DJ Jacques, P Jaros, J Johnson, AS Johnson, JR Johnson, RA Junk, T Kajikawa, R Kalelkar, M Kang, HJ Karliner, I Kawahara, H Kendall, HW Kim, Y King, ME King, R Kofler, RR Krishna, NM Kroeger, RS Labs, JF Langston, M Lath, A Lauber, JA Leith, DWGS Liu, MX Liu, X Loreti, M Lu, A Lynch, HL Ma, J Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T Massetti, R Masuda, H Mazzucato, E McKemey, AK Meadows, BT Messner, R Mockett, PM Moffeit, KC Mours, B Muller, D Nagamine, T Narita, S Nauenberg, U Neal, H Nussbaum, M Ohnishi, Y Osborne, LS Panvini, RS Park, H Pavel, TJ Peruzzi, I Piccolo, M Piemontese, L Pieroni, E Pitts, KT Plano, RJ Prepost, R Prescott, CY Punkar, GD Quigley, J Ratcliff, BN Reeves, TW Reidy, J Rensing, PE Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schaffner, SF Schalk, T Schindler, RH Schumm, BA Seiden, A Sen, S Serbo, VV Shaevitz, MH Shank, JT Shapiro, G Shapiro, SL Sherden, DJ Shmakov, KD Simopoulos, C Sinev, NB Smith, SR Snyder, JA Stamer, P Steiner, H Steiner, R Strauss, MG Su, D Suekane, F Sugiyama, A Suzuki, S Swartz, M Szumilo, A Takahashi, T Taylor, FE Torrence, E Trandafir, AI Turk, JD Usher, T Vavra, J Vannini, C Vella, E Venuti, JP Verdier, R Verdini, PG Wagner, SR Waite, AP Watts, SJ Weidemann, AW Weiss, ER Whitaker, JS White, SL Wickens, FJ Williams, DA Williams, DC Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Woods, M Word, GB Wyss, J Yamamoto, RK Yamartino, JM Yang, X Yellin, SJ Young, CC Yuta, H Zapalac, G Zdarko, RW Zeitlin, C Zhang, Z Zhou, J AF Abe, K Abt, I Ahn, CJ Akagi, T Allen, NJ Ash, WW Aston, D Baird, KG Baltay, C Band, HR Barakat, MB Baranko, G Bardon, O Barklow, T Bazarko, AO BenDavid, R Benvenuti, AC Bilei, GM Bisello, D Blaylock, G Bogart, JR Bolton, T Bower, GR Brau, JE Breidenbach, M Bugg, WM Burke, D Burnett, TH Burrows, PN Busza, W Calcaterra, A Caldwell, DO Calloway, D Camanzi, B Carpinelli, M Cassell, R Castaldi, R Castro, A CavalliSforza, M Chou, A Church, E Cohn, HO Coller, JA Cook, V Cotton, R Cowan, RF Coyne, DG Crawford, G DOliveira, A Damerell, CJS Daoudi, M DeSangro, R DeSimone, P DellOrso, R Dima, M Du, PYC Dubois, R Eisenstein, BI Elia, R Etzion, E Falciai, D Fan, C Fero, MJ Frey, R Furuno, K Gillman, T Gladding, G Gonzalez, S Hallewell, GD Hart, EL Hasan, A Hasegawa, Y Hasuko, K Hedges, S Hertzbach, SS Hildreth, MD Huber, J Huffer, ME Hughes, EW Hwang, H Iwasaki, Y Jackson, DJ Jacques, P Jaros, J Johnson, AS Johnson, JR Johnson, RA Junk, T Kajikawa, R Kalelkar, M Kang, HJ Karliner, I Kawahara, H Kendall, HW Kim, Y King, ME King, R Kofler, RR Krishna, NM Kroeger, RS Labs, JF Langston, M Lath, A Lauber, JA Leith, DWGS Liu, MX Liu, X Loreti, M Lu, A Lynch, HL Ma, J Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T Massetti, R Masuda, H Mazzucato, E McKemey, AK Meadows, BT Messner, R Mockett, PM Moffeit, KC Mours, B Muller, D Nagamine, T Narita, S Nauenberg, U Neal, H Nussbaum, M Ohnishi, Y Osborne, LS Panvini, RS Park, H Pavel, TJ Peruzzi, I Piccolo, M Piemontese, L Pieroni, E Pitts, KT Plano, RJ Prepost, R Prescott, CY Punkar, GD Quigley, J Ratcliff, BN Reeves, TW Reidy, J Rensing, PE Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schaffner, SF Schalk, T Schindler, RH Schumm, BA Seiden, A Sen, S Serbo, VV Shaevitz, MH Shank, JT Shapiro, G Shapiro, SL Sherden, DJ Shmakov, KD Simopoulos, C Sinev, NB Smith, SR Snyder, JA Stamer, P Steiner, H Steiner, R Strauss, MG Su, D Suekane, F Sugiyama, A Suzuki, S Swartz, M Szumilo, A Takahashi, T Taylor, FE Torrence, E Trandafir, AI Turk, JD Usher, T Vavra, J Vannini, C Vella, E Venuti, JP Verdier, R Verdini, PG Wagner, SR Waite, AP Watts, SJ Weidemann, AW Weiss, ER Whitaker, JS White, SL Wickens, FJ Williams, DA Williams, DC Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Woods, M Word, GB Wyss, J Yamamoto, RK Yamartino, JM Yang, X Yellin, SJ Young, CC Yuta, H Zapalac, G Zdarko, RW Zeitlin, C Zhang, Z Zhou, J TI Factorial and cumulant moments in e(+)e(-)->hadrons at the Z(0) resonance SO PHYSICS LETTERS B LA English DT Article ID MULTIPLICITY DISTRIBUTIONS; HADRON-COLLISIONS; JETS AB We present the first experimental study of the ratio of cumulant to factorial moments of the charged-particle multiplicity distribution in high-energy particle interactions, using hadronic Z(0) decays collected by the SLD experiment at SLAG. We find that this ratio, as a function of the moment-rank q, decreases sharply to a negative minimum at q = 5, which is followed by quasi-oscillations. These features are insensitive to experimental systematic effects and are in qualitative agreement with expectations from next-to-next-to-leading-order perturbative QCD. C1 IST NAZL FIS NUCL, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY. BOSTON UNIV, BOSTON, MA 02215 USA. BRUNEL UNIV, UXBRIDGE UB8 3PH, MIDDX, ENGLAND. CALTECH, PASADENA, CA 91125 USA. UNIV CALIF SANTA BARBARA, SANTA BARBARA, CA 93106 USA. UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA. UNIV CINCINNATI, CINCINNATI, OH 45221 USA. COLORADO STATE UNIV, FT COLLINS, CO 80523 USA. UNIV COLORADO, BOULDER, CO 80309 USA. COLUMBIA UNIV, NEW YORK, NY 10027 USA. IST NAZL FIS NUCL, SEZ FERRARA, I-44100 FERRARA, ITALY. UNIV FERRARA, I-44100 FERRARA, ITALY. IST NAZL FIS NUCL, NAZL FRASCATI LAB, I-00044 FRASCATI, ITALY. UNIV ILLINOIS, URBANA, IL 61801 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA. MIT, CAMBRIDGE, MA 02139 USA. UNIV MASSACHUSETTS, AMHERST, MA 01003 USA. UNIV MISSISSIPPI, UNIVERSITY, MS 38677 USA. NAGOYA UNIV, CHIKUSA KU, NAGOYA, AICHI 464, JAPAN. UNIV OREGON, EUGENE, OR 97403 USA. UNIV PADUA, I-35100 PADUA, ITALY. IST NAZL FIS NUCL, SEZ PADOVA, I-35100 PADUA, ITALY. UNIV PERUGIA, I-06100 PERUGIA, ITALY. IST NAZL FIS NUCL, SEZ PERUGIA, I-06100 PERUGIA, ITALY. UNIV PISA, I-56100 PISA, ITALY. IST NAZL FIS NUCL, SEZ PISA, I-56100 PISA, ITALY. RUTGERS STATE UNIV, PISCATAWAY, NJ 08855 USA. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. SOGANG UNIV, SEOUL, SOUTH KOREA. STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. UNIV TENNESSEE, KNOXVILLE, TN 37996 USA. TOHOKU UNIV, SENDAI, MIYAGI 980, JAPAN. VANDERBILT UNIV, NASHVILLE, TN 37235 USA. UNIV WASHINGTON, SEATTLE, WA 98195 USA. UNIV WISCONSIN, MADISON, WI 53706 USA. YALE UNIV, NEW HAVEN, CT 06511 USA. RP ADELPHI UNIV, GARDEN CITY, NY 11530 USA. RI Schaffner, Stephen/D-1189-2011; de Sangro, Riccardo/J-2901-2012; Cavalli-Sforza, Matteo/H-7102-2015; Frey, Raymond/E-2830-2016; Calcaterra, Alessandro/P-5260-2015; OI de Sangro, Riccardo/0000-0002-3808-5455; Frey, Raymond/0000-0003-0341-2636; Calcaterra, Alessandro/0000-0003-2670-4826; pieroni, enrico/0000-0002-4246-6963; Wyss, Jeffery/0000-0002-8277-4012; Wilson, Robert/0000-0002-8184-4103 NR 26 TC 36 Z9 36 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 MAR 21 PY 1996 VL 371 IS 1-2 BP 149 EP 156 DI 10.1016/0370-2693(96)00046-9 PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UB860 UT WOS:A1996UB86000023 ER PT J AU Aitala, EM Amato, S Anjos, JC Appel, JA Ashery, D Banerjee, S Bediaga, I Blaylock, G Bracker, SB Burchat, PR Burnstein, RA Carter, T Carvalho, HS Costa, I Cremaldi, LM Darling, C Denisenko, K Fernandez, A Gagnon, P Gerzon, S Gobel, C Gounder, K Granite, D Halling, AM Herrera, G Hurvits, G James, C Kasper, PA Kondakis, N Kwan, S Langs, DC Leslie, J Lichtenstadt, J Lundberg, B Manacero, A MayTalBeck, S Meadows, B deMello, JRT Milburn, RH deMiranda, JM Napier, A Nguyen, A dOliveira, AB OShaugnessy, K Peng, KC Perera, LP Purohit, MV Quinn, B Radeztsky, S Rafatian, A Reay, NW Reidy, JJ Reis, AC Rubin, HA Santha, AKS Santoro, AFS Schwartz, AJ Sheaff, M Sidwell, RA Slaughter, AJ Smith, JG Sokoloff, MD Stanton, NR Sugano, K Summers, DJ Takach, S Thorne, K Tripathi, AK Watanabe, S WeissBabai, R Wiener, J Witchey, N Wolin, E Yi, D Zaliznyak, R Zhang, C AF Aitala, EM Amato, S Anjos, JC Appel, JA Ashery, D Banerjee, S Bediaga, I Blaylock, G Bracker, SB Burchat, PR Burnstein, RA Carter, T Carvalho, HS Costa, I Cremaldi, LM Darling, C Denisenko, K Fernandez, A Gagnon, P Gerzon, S Gobel, C Gounder, K Granite, D Halling, AM Herrera, G Hurvits, G James, C Kasper, PA Kondakis, N Kwan, S Langs, DC Leslie, J Lichtenstadt, J Lundberg, B Manacero, A MayTalBeck, S Meadows, B deMello, JRT Milburn, RH deMiranda, JM Napier, A Nguyen, A dOliveira, AB OShaugnessy, K Peng, KC Perera, LP Purohit, MV Quinn, B Radeztsky, S Rafatian, A Reay, NW Reidy, JJ Reis, AC Rubin, HA Santha, AKS Santoro, AFS Schwartz, AJ Sheaff, M Sidwell, RA Slaughter, AJ Smith, JG Sokoloff, MD Stanton, NR Sugano, K Summers, DJ Takach, S Thorne, K Tripathi, AK Watanabe, S WeissBabai, R Wiener, J Witchey, N Wolin, E Yi, D Zaliznyak, R Zhang, C TI Asymmetries between the production of D+ and D- mesons from 500 GeV/c pi(-)-nucleus interactions as a function of x(F) and p(t)(2) SO PHYSICS LETTERS B LA English DT Article ID COLLISIONS AB We present asymmetries between the production of D+ and D- mesons in Fermilab experiment E791 as a function of x(F) and p(t)(2). The data used here consist of 74000 fully-reconstructed charmed mesons produced by a 500 GeV/c pi(-) beam on C and Pt foils. The measurements are compared to results of models which predict differences between the production of heavy-quark mesons that have a light quark in common with the beam (leading particles) and those that do not (non-leading particles). While the default models do not agree with our data, we can reach agreement with one of them, PYTHIA, by making a limited number of changes to parameters used. C1 UNIV CINCINNATI,CINCINNATI,OH 45221. CINVESTAV IPN,MEXICO CITY,DF,MEXICO. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IIT,CHICAGO,IL 60616. KANSAS STATE UNIV,MANHATTAN,KS 66506. UNIV MISSISSIPPI,UNIVERSITY,MS 38677. OHIO STATE UNIV,COLUMBUS,OH 43210. PRINCETON UNIV,PRINCETON,NJ 08544. UNIV AUTONOMA PUEBLA,PUEBLA 72570,MEXICO. UNIV S CAROLINA,COLUMBIA,SC 29208. STANFORD UNIV,STANFORD,CA 94305. TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. CTR BRASILEIRO PESQUISAS FIS,RIO JANEIRO,BRAZIL. CTR BRASILEIRO PESQUISAS FIS,RIO JANEIRO,BRAZIL. UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064. RP Aitala, EM (reprint author), UNIV MISSISSIPPI,UNIVERSITY,MS 38677, USA. RI Manacero, Aleardo/D-3941-2012; Anjos, Joao/C-8335-2013; de Mello Neto, Joao/C-5822-2013; Gobel Burlamaqui de Mello, Carla /H-4721-2016 OI Manacero, Aleardo/0000-0002-4581-7482; de Mello Neto, Joao/0000-0002-3234-6634; Gobel Burlamaqui de Mello, Carla /0000-0003-0523-495X NR 20 TC 99 Z9 99 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 MAR 21 PY 1996 VL 371 IS 1-2 BP 157 EP 162 DI 10.1016/0370-2693(96)00093-7 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UB860 UT WOS:A1996UB86000024 ER PT J AU Kolb, EW Tkachev, II AF Kolb, EW Tkachev, II TI Femtolensing and picolensing by axion miniclusters SO ASTROPHYSICAL JOURNAL LA English DT Article DE dark matter; elementary particles; gravitational lensing ID INVISIBLE AXION; PARTICLE; INSTANTONS; STRINGS; OBJECTS; DENSITY; SN1987A; BOUNDS; STARS; MASS AB Nonlinear effects in the evolution of the axion field in the early universe may lead to the formation of gravitationally bound clumps of axions, known as ''miniclusters.'' Minicluster masses and radii should be in the range M(mc) similar to 10(-12) M. and R(mc) similar to 10(10) cm, and in plausible early-universe scenarios a significant fraction of the mass density of the universe may be in the form of axion miniclusters. If such axion miniclusters exist, they would have the physical properties required to be detected by ''femtolensing.'' C1 UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210. RUSSIAN ACAD SCI,INST NUCL RES,MOSCOW 117901,RUSSIA. RP Kolb, EW (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 35 TC 45 Z9 45 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1996 VL 460 IS 1 BP L25 EP & PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TZ367 UT WOS:A1996TZ36700006 ER PT J AU Li, H Kusunose, M Liang, EP AF Li, H Kusunose, M Liang, EP TI Gamma rays from galactic black hole candidates with stochastic particle acceleration SO ASTROPHYSICAL JOURNAL LA English DT Article DE acceleration of particles; black hole physics; gamma rays, observations; gamma rays, theory; radiation mechanisms, nonthermal; radiation mechanisms, thermal ID PAIR PRODUCTION; PLASMAS; CYGNUS-X-1; SCATTERING; SPECTRA AB We consider stochastic particle acceleration in plasmas around stellar mass black holes to explain the emissions above 1 MeV from Galactic black hole candidates. We show that for certain parameter regimes, electrons can overcome Coulomb losses and be accelerated beyond the thermal distribution to form a new population, the distribution of which is broad and is usually not a power law; the peak energy of the distribution is determined by the balance between acceleration and cooling, with particles piling up around it. Radiation by inverse-Compton scattering off the thermal (from background) and nonthermal (produced by acceleration) particles can in principle explain the hard X-ray to gamma-ray emissions from black hole candidates. We present model fits of Cyg X-1 and GRO J0422 in the 50 keV-5 MeV region observed with OSSE and COMPTEL. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712. RP Li, H (reprint author), RICE UNIV,DEPT SPACE PHYS & ASTRON,HOUSTON,TX 77251, USA. NR 34 TC 23 Z9 23 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 20 PY 1996 VL 460 IS 1 BP L29 EP L32 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TZ367 UT WOS:A1996TZ36700007 ER PT J AU Gasteiger, HA Markovic, NM Ross, PN AF Gasteiger, HA Markovic, NM Ross, PN TI Bromide adsorption on Pt(111): Adsorption isotherm and electrosorption valency deduced from RRD(Pt(111))E measurements SO LANGMUIR LA English DT Letter ID SURFACE; PLATINUM; ELECTROCHEMISTRY; SPECTROSCOPY; MOLECULES; HALIDES; COPPER; LEED; PH AB The rotating ring-disk electrode technique with a Pt(111) single crystal in the disk position is used to establish, for the first time, both the bromide adsorption isotherm and its electrosorption valency on Pt(111). In 0.1 M HClO4 with approximate to 10(-4) M Br-, bromide adsorption begins at ca. -0.15 V (SCE) and reaches a coverage of approximate to 0.42 ML at 0.5 V; the electrosorption valency is essentially unity. By subtracting the bromide flux from the Pt(111)-disk current, we were able to deconvolute hydrogen adsorption/desorption processes in the presence of bromide. The major peak in the voltammetry at ca. -0.1 V is the simultaneous desorption/adsorption of hydrogen and adsorption/desorption of bromide. Furthermore, we demonstrated that the saturation coverage of adsorbed hydrogen on Pt(111) is approximate to 160 mu C/cm(2). C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV SCI MAT, BERKELEY, CA 94720 USA. NR 32 TC 42 Z9 42 U1 0 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAR 20 PY 1996 VL 12 IS 6 BP 1414 EP 1418 DI 10.1021/la950826s PG 5 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA UB634 UT WOS:A1996UB63400003 ER PT J AU Dees, C Godfrey, VL Schultz, RD Travis, CC AF Dees, C Godfrey, VL Schultz, RD Travis, CC TI Wild type p53 reduces the size of tumors caused by bovine leukemia virus-infected cells SO CANCER LETTERS LA English DT Article DE p53; BLV; treatment; transfection AB Bat lung (BAT(2)CL6) cells infected with bovine leukemia virus (BLV) cause malignant tumors in nude mice that after 6 weeks subcutaneous growth, have an average volume of 0.3 cm(3). Uninfected bat lung cells (To 1 Lu) produce small benign neoplasms that average 0.003 cm(3). BAT(2)CL6 cells were transfected in vitro with expression vectors that produce wild type human or mutant p53. Production of human p53 in transfected BAT(2)CL6 cells was confirmed by immunoprecipitation of p53 and by immunohistochemical staining using anti-human p53 monoclonal antibodies. BAT(2)CL6 cells transfected with wild type p53 produced tumors in nude mice averaging 0.03 cm(3) whereas cells transfected with mutant p53 yielded tumors averaging 0.3 cm(3). BAT(2)CL6 cell tumors after 1 week subcutaneous growth were transfected in situ with the wild type p53 gene. At 6 weeks tumor volume of in situ transfected tumors was similar to those resulting from cells transfected in vitro. Histopathologic examination and immunochemical staining of tumors produced in nude mice after wild type p53 treatment showed no significant differences when compared to tumors produced by untreated BAT(2)CL6 cells. Therefore, it is likely that the tumors produced by p53 treated-cells arose from cells that escaped transfection. The reduction of tumor size by restoration of wild type 53 may prove to be a useful therapy for BLV-induced tumors. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. UNIV WISCONSIN,SCH VET MED,DEPT PATHOBIOL,MADISON,WI 53706. RP Dees, C (reprint author), OAK RIDGE NATL LAB,HLTH SCI RES DIV,RISK ANAL SECT,MOL TOXICOL GRP,POB 2008,BLDG 4500S,OAK RIDGE,TN 37831, USA. NR 12 TC 2 Z9 3 U1 0 U2 0 PU ELSEVIER SCI IRELAND LTD PI CLARE PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE, IRELAND SN 0304-3835 J9 CANCER LETT JI Cancer Lett. PD MAR 19 PY 1996 VL 101 IS 1 BP 115 EP 122 DI 10.1016/0304-3835(96)04125-0 PG 8 WC Oncology SC Oncology GA TW797 UT WOS:A1996TW79700018 PM 8625274 ER PT J AU Brammer, L Klooster, WT Lemke, FR AF Brammer, L Klooster, WT Lemke, FR TI Neutron diffraction studies of [Cp(PMe(3))(2)RuH] and [Cp(PMe(3))(2)RuH2]BF4 at 20 K SO ORGANOMETALLICS LA English DT Article ID X-RAY; DIHYDROGEN COMPLEXES; CYCLOPENTADIENYL-RUTHENIUM; COORDINATED DIHYDROGEN; HYDRIDE COMPLEXES; METAL-HYDRIDES; ETA-2-DIHYDROGEN; PROTONATION; CHEMISTRY; IRIDIUM AB The crystal and molecular structures of [Cp(PMe(3))(2)RuH] (1) and [Cp(PMe(3))(2)RuH2]BF4 (2) have been determined from neutron diffraction measurements at 20 K. The Ru-H bond lengths in 1 (1.630(4) Angstrom) and 2 (1.599(8), 1.604(9) Angstrom) are the first terminal Ru-H distances to be determined by single-crystal neutron diffraction. The ''Cp'L(2)Ru'' system is now the first to have neutron diffraction studies of the monohydride, dihydride, and dihydrogen species. This is of particular importance in understanding the activation of H-2 by this metal-ligand fragment. Thus detailed comparisons with the recent structure determination by neutron diffraction of the dihydrogen complex [Cp*(dppm)Ru(eta(2)-H-2)]BF4 (dppm = bis(diphenylphosphino)methane) [Klooster, W. T.; Koetzle, T. F.; Jia, G.; Fong, T. P.; Morris, R. H.; Albinati, A. J. Am. Chem. Sec. 1994, 116, 7677-7681] are presented. A network of C-H ... F-BF3 hydrogen bonds links the anion and cation moieties in 2. The C(2)-H(2)... F(4) interaction has an H ... F separation of only 2.078(8) Angstrom, the shortest such interaction characterized to date by neutron diffraction. Ru-H stretching frequencies determined from the diffraction data are in good agreement with those from IR measurements. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. OHIO UNIV,ATHENS,OH 45701. RP Brammer, L (reprint author), UNIV MISSOURI,DEPT CHEM,8001 NAT BRIDGE RD,ST LOUIS,MO 63121, USA. NR 44 TC 52 Z9 52 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD MAR 19 PY 1996 VL 15 IS 6 BP 1721 EP 1727 DI 10.1021/om950952r PG 7 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA UB307 UT WOS:A1996UB30700029 ER PT J AU Erdemir, A Bindal, C Fenske, GR AF Erdemir, A Bindal, C Fenske, GR TI Formation of ultralow friction surface films on boron carbide SO APPLIED PHYSICS LETTERS LA English DT Article ID ACID-FORMING SURFACES; TRIBOLOGICAL PROPERTIES; SELF-LUBRICATION; BORIC-ACID AB In this letter, we describe the formation and ultralow friction mechanisms of a surface film on boron carbide (B4C). This film results from sequential reactions between B4C and oxygen and between the resulting boron oxide (B2O3) and moisture; it can afford friction coefficients of 0.03 to 0.05 to sliding steel surfaces. At temperatures above 600 degrees C, B4C undergoes oxidation and forms a layer of boron oxide (B2O3) in the upper surface. During cooling to room temperature, the B2O3 reacts with moisture in the air to form a secondary him, boric acid (H3BO3) The sliding friction coefficient of 440C steel balls against this film is 0.04, compared to 0.7 against the bare B4C surfaces. Mechanistically, we propose that the ultralow friction behavior of the heat-treated B4C surface is due mainly to the layered-crystal structure of the H3BO3 film that forms on the sliding surface. (C) 1996 American Institute of Physics. C1 SAKARYA UNIV,DEPT MET ENGN,ADAPAZARI,TURKEY. RP Erdemir, A (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439, USA. NR 14 TC 70 Z9 76 U1 1 U2 14 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 18 PY 1996 VL 68 IS 12 BP 1637 EP 1639 DI 10.1063/1.115676 PG 3 WC Physics, Applied SC Physics GA UA597 UT WOS:A1996UA59700015 ER PT J AU Gruen, DM Krauss, AR Zuiker, CD Csencsits, R Terminello, LJ Carlisle, JA Jimenez, I Sutherland, DGJ Shuh, DK Tong, W Himpsel, FJ AF Gruen, DM Krauss, AR Zuiker, CD Csencsits, R Terminello, LJ Carlisle, JA Jimenez, I Sutherland, DGJ Shuh, DK Tong, W Himpsel, FJ TI Characterization of nanocrystalline diamond films by core-level photoabsorption SO APPLIED PHYSICS LETTERS LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; ABSORPTION FINE-STRUCTURE AB Core-level photoabsorption has been used to determine the sp(2) and sp(3) bonding content of nanocrystalline diamond thin films grown using C-60 Or CH4 precursors. The C(ls) absorption spectra show clear bulk diamond excitonic and sp(3) features with little evidence of sp(2) bonding, while the Raman spectra measured from these same films are ambiguous and indeterminate. This result can be attributed to the local structure (near-neighbor bonding) sensitivity of core-level photoabsorption that is insensitive to domain size, unlike Raman spectroscopy. (C) 1996 American Institute of Physics. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. LAWRENCE LIVERMORE NATL LAB,DIV MAT SCI & TECHNOL,LIVERMORE,CA 94550. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. RP Gruen, DM (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Jimenez, Ignacio/F-7422-2010 OI Jimenez, Ignacio/0000-0001-5605-3185 NR 14 TC 106 Z9 111 U1 0 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 18 PY 1996 VL 68 IS 12 BP 1640 EP 1642 DI 10.1063/1.115677 PG 3 WC Physics, Applied SC Physics GA UA597 UT WOS:A1996UA59700016 ER PT J AU Friedmann, TA McCarty, KF Barbour, JC Siegal, MP Dibble, DC AF Friedmann, TA McCarty, KF Barbour, JC Siegal, MP Dibble, DC TI Thermal stability of amorphous carbon films grown by pulsed laser deposition SO APPLIED PHYSICS LETTERS LA English DT Article ID DIAMOND FILMS AB The thermal stability in vacuum of amorphous tetrahedrally coordinated carbon (a-tC) films grown on Si has been assessed by in situ Raman spectroscopy. Films were grown in vacuum on room-temperature substrates using laser fluences of 12, 22, and 45 J/cm(2) and in a background gas of either hydrogen or nitrogen using a laser fluence of 45 J/cm(2). The films grown in vacuum at high fluence (>20J/cm(2)) show little change in the a-tC Raman spectra with temperature up to 800 degrees C. Above this temperature the films convert to glassy carbon (nanocrystalline graphite). Samples grown in vacuum at lower fluence or in a background gas (H-2 or N-2) at high fluence are not nearly as stable. For all samples, the Raman signal from the Si substrate (observed through the a-tC film) decreases in intensity with annealing temperature indicating that the transparency of the a-tC films is decreasing with temperature. These changes in transparency begin at much lower temperatures (similar to 200 degrees C) than the changes in the a-tC Raman band shape and indicate that subtle changes are occurring in the a-tC films at lower temperatures. (C) 1996 American Institute of Physics. C1 SANDIA NATL LABS, LIVERMORE, CA 94551 USA. RP SANDIA NATL LABS, POB 5800, ALBUQUERQUE, NM 87185 USA. RI McCarty, Kevin/F-9368-2012 OI McCarty, Kevin/0000-0002-8601-079X NR 14 TC 97 Z9 99 U1 4 U2 14 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 MAR 18 PY 1996 VL 68 IS 12 BP 1643 EP 1645 DI 10.1063/1.115891 PG 3 WC Physics, Applied SC Physics GA UA597 UT WOS:A1996UA59700017 ER PT J AU Findikoglu, AT Jia, QX Wu, XD Chen, GJ Venkatesan, T Reagor, DW AF Findikoglu, AT Jia, QX Wu, XD Chen, GJ Venkatesan, T Reagor, DW TI Tunable and adaptive bandpass filter using a nonlinear dielectric thin film of SrTiO3 SO APPLIED PHYSICS LETTERS LA English DT Article AB We have prepared an electrically tunable and adaptive 3-pole half-wave bandpass coplanar waveguide filter incorporating a 1.2-mu m-thick paraelectric SrTiO3 bottom layer and a 0.4-mu m-thick superconducting YBa2Cu3O7-x top electrode layer on a LaAlO3 substrate. By applying a separate bias voltage on each pole and also on each coupling capacitance of the device at 4 and 76 K, the filter response is not only fine tuned to achieve symmetric and optimized filter characteristics with less than 2% bandwidth centered around 2.5 GHz, but also broadband tuned to shift the passband by more than 15%. (C) 1996 American Institute of Physics. C1 UNIV MARYLAND,CTR SUPERCONDUCT RES,COLLEGE PK,MD 20742. RP Findikoglu, AT (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,SUPERCONDUCT TECHNOL CTR,LOS ALAMOS,NM 87545, USA. RI Venkatesan, Thirumalai/E-1667-2013; Jia, Q. X./C-5194-2008 NR 6 TC 77 Z9 81 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 18 PY 1996 VL 68 IS 12 BP 1651 EP 1653 DI 10.1063/1.115894 PG 3 WC Physics, Applied SC Physics GA UA597 UT WOS:A1996UA59700020 ER PT J AU Cooke, DW Bennett, BL Farnum, EH Hults, WL Sickafus, KE Smith, JF Smith, JL Taylor, TN Tiwari, P Portis, AM AF Cooke, DW Bennett, BL Farnum, EH Hults, WL Sickafus, KE Smith, JF Smith, JL Taylor, TN Tiwari, P Portis, AM TI SiOx luminescence from light-emitting porous silicon: Support for the quantum confinement luminescence center model SO APPLIED PHYSICS LETTERS LA English DT Article AB Measurements of hydrogen loss and luminescence as a function of annealing temperature in porous silicon suggest that luminescence is attributable to electron-hole recombination in SiOx surface layers with an intensity that is dependent upon the surface hydrogen content. The luminescence is composed of three Gaussian bands similar to those found in amorphous SiO2. X-ray photoelectron spectroscopy and scanning electron microscopy show porous silicon has SiOx on the surface, which is comprised of many particles of about 10 nm size. Collectively, the data strongly support the previously proposed quantum confinement/luminescence center model. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP Cooke, DW (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 19 TC 71 Z9 74 U1 1 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 18 PY 1996 VL 68 IS 12 BP 1663 EP 1665 DI 10.1063/1.115898 PG 3 WC Physics, Applied SC Physics GA UA597 UT WOS:A1996UA59700024 ER PT J AU BourretCourchesne, ED AF BourretCourchesne, ED TI On the origin of stacking faults at the GaAs/ZnSe heterointerface SO APPLIED PHYSICS LETTERS LA English DT Article ID ZNSE AB A series of experiments was designed to assess the effects of the various stages of the nucleation process on the formation of stacking faults at the GaAs/ZnSe interface. Differential interference contrast microscopy was used to image stacking faults and misfit dislocations in 1000 Angstrom thick ZnSe layers. We have demonstrated that an As-stabilized GaAs surface is needed to obtain a low density of stacking faults. However, an excess of As favors the formation of stacking faults. More importantly, the introduction of Zn drastically increases the stacking fault density. RP BourretCourchesne, ED (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,CTR ADV MAT 2200,BERKELEY,CA 94720, USA. NR 12 TC 19 Z9 19 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 18 PY 1996 VL 68 IS 12 BP 1675 EP 1677 DI 10.1063/1.115902 PG 3 WC Physics, Applied SC Physics GA UA597 UT WOS:A1996UA59700028 ER PT J AU Warren, WL AlShareef, HN Dimos, D Tuttle, BA Pike, GE AF Warren, WL AlShareef, HN Dimos, D Tuttle, BA Pike, GE TI Driving force behind voltage shifts in ferroelectric materials SO APPLIED PHYSICS LETTERS LA English DT Article ID DOMAIN STABILIZATION; INTERNAL BIAS; DOPED BATIO3; CERAMICS AB By systematically poling Pb(Zr,Ti)O-3 capacitors to different extents, we observe a linear relationship between the remanent polarization and the magnitude of voltage offsets in the hysteresis curve. This result directly shows that the polarization is the impetus behind voltage shifts and, thus, imprint in ferroelectric capacitors. It is proposed that the increased polarization lowers the electrostatic potential well for the trapping of electrons thereby leading to greater voltage shifts. We also find that the remanent polarization and defect occupancy are temperature dependent which collectively impact the observed voltage offsets measured at elevated temperature. (C) 1996 American Institute of Physics. RP Warren, WL (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. RI Alshareef, Husam Niman/A-2000-2015 OI Alshareef, Husam Niman/0000-0001-5029-2142 NR 21 TC 67 Z9 68 U1 0 U2 17 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 18 PY 1996 VL 68 IS 12 BP 1681 EP 1683 DI 10.1063/1.115904 PG 3 WC Physics, Applied SC Physics GA UA597 UT WOS:A1996UA59700030 ER PT J AU Hofman, DJ Back, BB Paul, P AF Hofman, DJ Back, BB Paul, P TI Rapid increase in prescission GDR gamma-ray emission with energy SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT Groningen Conference on Giant Resonances CY JUN 28-JUL 01, 1995 CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS HO UNIV GRONINGEN ID GIANT-DIPOLE RESONANCE; FUSION-FISSION; QUASI-FISSION; MODEL; THORIUM; NUCLEI; DECAY AB A rapid increase in the emission of prescission giant dipole resonance (GDR) gamma-rays with bombarding energy is observed in excited Th and Cf nuclei formed in the reactions O-16+Pb-208 and S-32+W-nat,Pb-208. This increase begins around E(exc) = 40 MeV for the O-16+Pb-208 reaction and E(exc) = 70 MeV for the S-32-induced reactions. The excess gamma-ray yield above these thresholds cannot be described within the standard statistical model. Statistical model calculations which include a temperature dependent nuclear dissipation are able to reproduce simultaneously the observed GDR gamma-ray spectra and recently measured evaporation residue cross sections. C1 SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794. RP Hofman, DJ (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 19 TC 7 Z9 7 U1 2 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 18 PY 1996 VL 599 IS 1-2 BP C23 EP C28 PG 6 WC Physics, Nuclear SC Physics GA UJ217 UT WOS:A1996UJ21700004 ER PT J AU Ormand, WE Bortignon, PF Broglia, RA AF Ormand, WE Bortignon, PF Broglia, RA TI The temperature dependence of the width of the giant-dipole resonance SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT Groningen Conference on Giant Resonances CY JUN 28-JUL 01, 1995 CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS HO UNIV GRONINGEN ID HOT ROTATING NUCLEI; THERMAL FLUCTUATIONS; FINITE TEMPERATURE AB The giant-dipole resonance (GDR) in Sn-120 and Pb-208 is studied as a function of excitation energy, angular momentum, and intrinsic width within the context of the adiabatic model. Theoretical evaluations of the full-width-at-half-maximum (FWHM) for the GDR strength function are compared with recent experimental data and are found to be in god agreement. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,SEZ MILANO,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK. RP Ormand, WE (reprint author), UNIV TENNESSEE,DEPT PHYS,401 NIELSEN HALL,KNOXVILLE,TN 37996, USA. NR 28 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 18 PY 1996 VL 599 IS 1-2 BP C57 EP C62 PG 6 WC Physics, Nuclear SC Physics GA UJ217 UT WOS:A1996UJ21700007 ER PT J AU Ramakrishnan, E Baumann, T Azhari, A Kryger, RA Pfaff, R Thoennessen, M Yokoyama, S Beene, JR Halbert, ML Mueller, PE Stracener, DW Varner, RL VanBuren, G Charity, RJ Dempsey, JF Hua, PF Sarantites, DG Sobotka, LG AF Ramakrishnan, E Baumann, T Azhari, A Kryger, RA Pfaff, R Thoennessen, M Yokoyama, S Beene, JR Halbert, ML Mueller, PE Stracener, DW Varner, RL VanBuren, G Charity, RJ Dempsey, JF Hua, PF Sarantites, DG Sobotka, LG TI Giant dipole resonance in excited Sn-120 and Pb-208 nuclei populated by inelastic alpha scattering SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT Groningen Conference on Giant Resonances CY JUN 28-JUL 01, 1995 CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS HO UNIV GRONINGEN ID LEVEL-DENSITY PARAMETER; EXCITATION-ENERGY AB The evolution of the giant dipole resonance (GDR) in hob Sn-120 and Pb-208 nuclei was studied by measuring high energy gamma-rays from the decay of the resonance. The excited nuclei were populated by inelastic scattering of alpha-particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase systematically with excitation energy in both systems. Inelastic scattering populates low angular momentum states in the target. The observed width increase is thus attributed to fluctuations iii the nuclear shape induced by temperature. C1 MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130. RP Ramakrishnan, E (reprint author), MICHIGAN STATE UNIV,NATL SUPERCONDUCTING CYCLOTRON LAB,E LANSING,MI 48824, USA. NR 16 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 18 PY 1996 VL 599 IS 1-2 BP C49 EP C55 PG 7 WC Physics, Nuclear SC Physics GA UJ217 UT WOS:A1996UJ21700006 ER PT J AU Ringbom, A Tibell, G Zorro, R Blomgren, J Conde, H Elmgren, K Hultqvist, S Nilsson, J Olsson, N Fahlander, C Nilsson, L Nyberg, J Reistad, D Renberg, PU Westerberg, L Likar, A Wender, S AF Ringbom, A Tibell, G Zorro, R Blomgren, J Conde, H Elmgren, K Hultqvist, S Nilsson, J Olsson, N Fahlander, C Nilsson, L Nyberg, J Reistad, D Renberg, PU Westerberg, L Likar, A Wender, S TI Studies of giant resonances by heavy ion scattering at a few hundred MeV/nucleon SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT Groningen Conference on Giant Resonances CY JUN 28-JUL 01, 1995 CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS HO UNIV GRONINGEN ID DIPOLE RESONANCE; EXCITATION; PB-208; DECAY AB A technique to study giant resonances by heavy ion scattering in the energy range 100-470A MeV using one quadrant of the CELSIUS storage ring as a spectrometer is presented. A test experiment using 250A MeV O-16 on an Ar-40 target has been performed. The inelastically scattered particles could be separated from the background originating from the beam halo using a focal plane telescope in coincidence with neutron detectors around the target. The resolution of the excitation energy spectrum was 3.5 +/- 0.5 MeV, mainly determined by the beam size at the target. C1 UNIV UPPSALA,DEPT NEUTRON RES,S-75121 UPPSALA,SWEDEN. UNIV UPPSALA,SVEDBERG LAB,S-75121 UPPSALA,SWEDEN. INST JOSEF STEFAN,LJUBLJANA,SLOVENIA. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP Ringbom, A (reprint author), UNIV UPPSALA,DEPT RADIAT SCI,BOX 535,S-75121 UPPSALA,SWEDEN. NR 7 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 18 PY 1996 VL 599 IS 1-2 BP C283 EP C288 PG 6 WC Physics, Nuclear SC Physics GA UJ217 UT WOS:A1996UJ21700031 ER PT J AU Schadmand, S Varma, R Banerjee, SR Back, BB Hofman, DJ Montoya, CP Paul, P AF Schadmand, S Varma, R Banerjee, SR Back, BB Hofman, DJ Montoya, CP Paul, P TI Internal pair decay of giant resonances in hot Pb-200 SO NUCLEAR PHYSICS A LA English DT Article; Proceedings Paper CT Groningen Conference on Giant Resonances CY JUN 28-JUL 01, 1995 CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS HO UNIV GRONINGEN ID MONOPOLE AB Electron-positron pairs emitted during the de-excitation of hot Pb-200 from the reaction 95 MeV F-19 + Ta-181 were detected with the Stony Brook pair detector. The internal pair decay from the giant dipole resonance (GDR) built on excited states in a heavy nucleus is cleanly observed for the first time. The results show that the GDR dominates the pair decay from a hot, heavy nucleus. Superior statistics is needed in order to extract weaker modes like the monopole or quadrupole giant resonances. Attempts to extract EO pair transitions by use of kinematic cuts and by dividing out the GDR pair strength are presented. C1 KERNFYS VERSNELLER INST,9747 AA GRONINGEN,NETHERLANDS. INDIAN INST TECHNOL,BOMBAY 400076,MAHARASHTRA,INDIA. ARGONNE NATL LAB,ARGONNE,IL 60439. RP Schadmand, S (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA. NR 13 TC 7 Z9 7 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD MAR 18 PY 1996 VL 599 IS 1-2 BP C89 EP C96 PG 8 WC Physics, Nuclear SC Physics GA UJ217 UT WOS:A1996UJ21700010 ER PT J AU Ooguri, H Vafa, C AF Ooguri, H Vafa, C TI Two-dimensional black hole and singularities of CY manifolds SO NUCLEAR PHYSICS B LA English DT Article DE theory of fundamental strings, properties of perturbation theory; conformal field theory, algebraic structures; compactification and four-dimensional models; noncritical string theory; extended classical solutions, cosmic strings, domain walls, texture ID CALABI-YAU MANIFOLDS; SUPERCONFORMAL FIELD-THEORIES; QUANTUM-GRAVITY; SU(N) HOLONOMY; STRING THEORY; MATRIX MODEL; 2 DIMENSIONS; GEOMETRY; VACUA; COMPACTIFICATION AB We study the degenerating limits of superconformal theories for compactifications on singular K3 and Calabi-Yau threefolds. We find that in both cases the degeneration involves creating an Euclidean two-dimensional black hole coupled weakly to the rest of the system. Moreover we find that the conformal theory of A(n) singularities of K3 are the same as that of the symmetric fivebrane. We also find intriguing connections between ADE (1,n) non-critical strings and singular limits of superconformal theories on the corresponding ALE space. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. HARVARD UNIV,LYMAN LAB PHYS,CAMBRIDGE,MA 02138. RP Ooguri, H (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,366 LE CONTE HALL,BERKELEY,CA 94720, USA. RI Ooguri, Hirosi/A-4407-2011; OI Ooguri, Hirosi/0000-0001-6021-3778 NR 63 TC 239 Z9 239 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAR 18 PY 1996 VL 463 IS 1 BP 55 EP 72 DI 10.1016/0550-3213(96)00008-9 PG 18 WC Physics, Particles & Fields SC Physics GA UE901 UT WOS:A1996UE90100003 ER PT J AU Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J AnwayWiese, C Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Auchincloss, P Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bortoletto, D Boudreau, J Breccia, L Bromberg, C BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Cunningham, JD Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demortier, L Denby, B Deninno, M Derwent, PF Devlin, T Dickson, M Dittmann, JR Donati, S Done, J Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fuess, TA Fukui, Y Funaki, S Gagliardi, G Galeotti, S Gallinaro, M GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keeble, L Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Labanca, N Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Morita, Y Mueller, J Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliver, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Romano, J Rosenson, L Roser, R Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Scarpine, V Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Sgolacchia, A Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Soumarokov, A Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonnison, J deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G vandenBrink, SC Vejcik, S Velev, G Vidal, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wang, C Wang, CH Wang, G Wang, J Wang, MJ Wang, QF Warburton, A Watts, G Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Wolinski, D Wolinski, J Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S AF Abe, F Akimoto, H Akopian, A Albrow, MG Amendolia, SR Amidei, D Antos, J AnwayWiese, C Aota, S Apollinari, G Asakawa, T Ashmanskas, W Atac, M Auchincloss, P Azfar, F AzziBacchetta, P Bacchetta, N Badgett, W Bagdasarov, S Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Berryhill, J Bertolucci, S Bhatti, A Biery, K Binkley, M Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bortoletto, D Boudreau, J Breccia, L Bromberg, C BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cauz, D Cen, Y Cervelli, F Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D CroninHennessy, D Culbertson, R Cunningham, JD Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demortier, L Denby, B Deninno, M Derwent, PF Devlin, T Dickson, M Dittmann, JR Donati, S Done, J Dunn, A Eddy, N Einsweiler, K Elias, JE Ely, R Engels, E Errede, D Errede, S Fan, Q Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Frisch, H Fuess, TA Fukui, Y Funaki, S Gagliardi, G Galeotti, S Gallinaro, M GarciaSciveres, M Garfinkel, AF Gay, C Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Goulianos, K Grassmann, H Groer, L GrossoPilcher, C Guillian, G Guo, RS Haber, C Hafen, E Hahn, SR Hamilton, R Handler, R Hans, RM Hara, K Hardman, AD Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Hayashi, E Heinrich, J Hoffman, KD Hohlmann, M Holck, C Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Huston, J Huth, J Hylen, J Ikeda, H Incagli, M Incandela, J Introzzi, G Iwai, J Iwata, Y Jensen, H Joshi, U Kadel, RW Kajfasz, E Kamon, T Kaneko, T Karr, K Kasha, H Kato, Y Keeble, L Kelley, K Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kharadia, B Kim, BJ Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, M Kuwabara, T Kuhlmann, SE Kuns, E Laasanen, AT Labanca, N Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Lockyer, N Long, O Loomis, C Loreti, M Lu, J Lucchesi, D Lukens, P Lusin, S Lys, J Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Metzler, S Miao, C Michail, G Miller, R Minato, H Miscetti, S Mishina, M Mitsushio, H Miyamoto, T Miyashita, S Morita, Y Mueller, J Mukherjee, A Muller, T Murat, P Nakada, H Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Ninomiya, M Nodulman, L Oh, SH Ohl, KE Ohmoto, T Ohsugi, T Oishi, R Okabe, M Okusawa, T Oliver, R Olsen, J Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Park, S Parri, A Patrick, J Pauletta, G Paulini, M Perazzo, A Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Pitts, KT Plunkett, R Pondrom, L Proudfoot, J Ptohos, F Punzi, G Ragan, K Ribon, A Rimondi, F Ristori, L Robertson, WJ Rodrigo, T Romano, J Rosenson, L Roser, R Sakumoto, WK Saltzberg, D Sansoni, A Santi, L Sato, H Scarpine, V Schlabach, P Schmidt, EE Schmidt, MP Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Sgolacchia, A Shapiro, MD Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Snider, FD Song, T Spalding, J Sphicas, P Spinella, F Spiropulu, M Spiegel, L Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Strohmer, R Stuart, D Sullivan, G Soumarokov, A Sumorok, K Suzuki, J Takada, T Takahashi, T Takano, T Takikawa, K Tamura, N Tannenbaum, B Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Toback, D Tollefson, K Tollestrup, A Tonnison, J deTroconiz, JF Truitt, S Tseng, J Turini, N Uchida, T Uemura, N Ukegawa, F Unal, G vandenBrink, SC Vejcik, S Velev, G Vidal, R Vondracek, M Vucinic, D Wagner, RG Wagner, RL Wahl, J Wang, C Wang, CH Wang, G Wang, J Wang, MJ Wang, QF Warburton, A Watts, G Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Wolinski, D Wolinski, J Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, W Zucchelli, S TI Search for gluino and squark cascade decays at the Fermilab tevatron collider SO PHYSICAL REVIEW LETTERS LA English DT Article ID ALPHA-S CALCULATION; Z0 DECAYS; SUPERGRAVITY; COLLISIONS; PARTICLES; DETECTOR; LEP; TEV AB We report on a search for supersymmetry using dilepton events which complements the classic missing E(T) plus multijet analyses. Using 19 pb(-1) of collisions at root s = 1.8 TeV recorded with the Collider Detector at Fermilab we have searched for squarks and gluinos decaying into charginos and producing events with two leptons. We observe one candidate event. In comparison, the expected number of background events from standard model processes is 2.39 +/- 0.63(stat)(-0.42)(+0.77)(syst). Hence we set limits on gluino and squark production based on predictions from the supergravity inspired minimal supersymmetric extension of the standard model. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV BOLOGNA,IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60637. DUKE UNIV,DURHAM,NC 27708. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. HARVARD UNIV,CAMBRIDGE,MA 02138. HIROSHIMA UNIV,HIGASHI KU,HIROSHIMA 724,JAPAN. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15260. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11529,TAIWAN. TEXAS A&M UNIV,COLLEGE STN,TX 77843. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. RP Abe, F (reprint author), KEK NAT LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI Vucinic, Dejan/C-2406-2008; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014; Introzzi, Gianluca/K-2497-2015; Tartarelli, Giuseppe Francesco/A-5629-2016 OI Bertolucci, Sergio/0000-0003-1738-4736; Gallinaro, Michele/0000-0003-1261-2277; Benlloch Baviera, Jose Maria/0000-0001-6073-1436; Turini, Nicola/0000-0002-9395-5230; Wyss, Jeffery/0000-0002-8277-4012; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580; Tartarelli, Giuseppe Francesco/0000-0002-4244-502X NR 26 TC 40 Z9 40 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2006 EP 2010 DI 10.1103/PhysRevLett.76.2006 PG 5 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400006 ER PT J AU Abe, F Albrow, MG Amendolia, SR Amidei, D Antos, J AnwayWiese, C Apollinari, G Areti, H Atac, M Auchincloss, P Azfar, F Azzi, P Bacchetta, N Badgett, W Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Bartalini, P Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Bertolucci, S Bhatti, A Biery, K Binkley, M Bird, F Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bortoletto, D Boswell, C Boulos, T Brandenburg, G Bromberg, C BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cen, Y Cervelli, F Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D Cunningham, JD Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demortier, L Denby, B Deninno, M Derwent, PF Devlin, T Dickson, M Dittmann, JR Donati, S Drucker, RB Dunn, A Einsweiler, K Elias, JE Ely, R Engels, E Eno, S Errede, D Errede, S Fan, Q Farhat, B Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Fry, A Fuess, TA Fukui, Y Funaki, S Gagliardi, G Galeotti, S Gallinaro, M Garfinkel, AF Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Goulianos, K Grassmann, H Grewal, A Groer, L GrossoPilcher, C Haber, C Hahn, SR Hamilton, R Handler, R Hans, RM Hara, K Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Heinrich, J CroninHennessy, D Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Hurst, P Huston, J Huth, J Hylen, J Incagli, M Incandela, J Iso, H Jensen, H Jessop, CP Joshi, U Kadel, RW Kajfasz, E Kamon, T Kaneko, T Kardelis, DA Kasha, H Kato, Y Keeble, L Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, N Kuhlmann, SE Kuns, E Laasanen, AT Labanca, N Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Lockyer, N Loomis, C Long, O Loreti, M Low, EH Lu, J Lucchesi, D Luchini, CB Lukens, P Lys, J Maas, P Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Michail, G Mikamo, S Miller, M Miller, R Mimashi, T Miscetti, S Mishina, M Mitsushio, H Miyashita, S Morita, Y Moulding, S Mueller, J Mukherjee, A Muller, T Musgrave, P Nakae, LF Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Nodulman, L Ogawa, S Oh, SH Ohl, KE Oishi, R Okusawa, T Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Park, S Patrick, J Pauletta, G Paulini, M Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Plunkett, R Pondrom, L Produit, N Proudfoot, J Ptohos, F Punzi, G Ragan, K Rimondi, F Ristori, L RoachBellino, M Robertson, WJ Rodrigo, T Romano, J Rosenson, L Sakumoto, WK Saltzberg, D Sansoni, A Scarpine, V Schindler, A Schlabach, P Schmidt, EE Schmidt, MP Schneider, O Sciacca, GF Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Sgolacchia, A Shapiro, M Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Smith, DA Snider, FD Song, L Song, T Spalding, J Spiegel, L Sphicas, P Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Stuart, D Sullivan, G Sumorok, K Swartz, RL Takahashi, T Takikawa, K Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, J Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Tollefson, K Tollestrup, A Tonnison, J deTroconiz, JF Tseng, J Turcotte, M Turini, N Uemura, N Ukegawa, F Unal, G vandenBrink, SC Vejcik, S Vidal, R Vondracek, M Vucunic, D Wagner, RG Wagner, RL Wainer, N Walker, RC Wang, C Wang, CH Wang, G Wang, J Wang, MJ Wang, QF Warburton, A Watts, G Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Westhusing, T Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Wolinski, J Wu, DY Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, S Zhang, W Zucchelli, S AF Abe, F Albrow, MG Amendolia, SR Amidei, D Antos, J AnwayWiese, C Apollinari, G Areti, H Atac, M Auchincloss, P Azfar, F Azzi, P Bacchetta, N Badgett, W Bailey, MW Bao, J deBarbaro, P BarbaroGaltieri, A Barnes, VE Barnett, BA Bartalini, P Bauer, G Baumann, T Bedeschi, F Behrends, S Belforte, S Bellettini, G Bellinger, J Benjamin, D Benlloch, J Bensinger, J Benton, D Beretvas, A Berge, JP Bertolucci, S Bhatti, A Biery, K Binkley, M Bird, F Bisello, D Blair, RE Blocker, C Bodek, A Bokhari, W Bolognesi, V Bortoletto, D Boswell, C Boulos, T Brandenburg, G Bromberg, C BuckleyGeer, E Budd, HS Burkett, K Busetto, G ByonWagner, A Byrum, KL Cammerata, J Campagnari, C Campbell, M Caner, A Carithers, W Carlsmith, D Castro, A Cen, Y Cervelli, F Chao, HY Chapman, J Cheng, MT Chiarelli, G Chikamatsu, T Chiou, CN Christofek, L Cihangir, S Clark, AG Cobal, M Contreras, M Conway, J Cooper, J Cordelli, M Couyoumtzelis, C Crane, D Cunningham, JD Daniels, T DeJongh, F Delchamps, S DellAgnello, S DellOrso, M Demortier, L Denby, B Deninno, M Derwent, PF Devlin, T Dickson, M Dittmann, JR Donati, S Drucker, RB Dunn, A Einsweiler, K Elias, JE Ely, R Engels, E Eno, S Errede, D Errede, S Fan, Q Farhat, B Fiori, I Flaugher, B Foster, GW Franklin, M Frautschi, M Freeman, J Friedman, J Fry, A Fuess, TA Fukui, Y Funaki, S Gagliardi, G Galeotti, S Gallinaro, M Garfinkel, AF Geer, S Gerdes, DW Giannetti, P Giokaris, N Giromini, P Gladney, L Glenzinski, D Gold, M Gonzalez, J Gordon, A Goshaw, AT Goulianos, K Grassmann, H Grewal, A Groer, L GrossoPilcher, C Haber, C Hahn, SR Hamilton, R Handler, R Hans, RM Hara, K Harral, B Harris, RM Hauger, SA Hauser, J Hawk, C Heinrich, J CroninHennessy, D Hollebeek, R Holloway, L Holscher, A Hong, S Houk, G Hu, P Huffman, BT Hughes, R Hurst, P Huston, J Huth, J Hylen, J Incagli, M Incandela, J Iso, H Jensen, H Jessop, CP Joshi, U Kadel, RW Kajfasz, E Kamon, T Kaneko, T Kardelis, DA Kasha, H Kato, Y Keeble, L Kennedy, RD Kephart, R Kesten, P Kestenbaum, D Keup, RM Keutelian, H Keyvan, F Kim, DH Kim, HS Kim, SB Kim, SH Kim, YK Kirsch, L Koehn, P Kondo, K Konigsberg, J Kopp, S Kordas, K Koska, W Kovacs, E Kowald, W Krasberg, M Kroll, J Kruse, N Kuhlmann, SE Kuns, E Laasanen, AT Labanca, N Lammel, S Lamoureux, JI LeCompte, T Leone, S Lewis, JD Limon, P Lindgren, M Liss, TM Lockyer, N Loomis, C Long, O Loreti, M Low, EH Lu, J Lucchesi, D Luchini, CB Lukens, P Lys, J Maas, P Maeshima, K Maghakian, A Maksimovic, P Mangano, M Mansour, J Mariotti, M Marriner, JP Martin, A Matthews, JAJ Mattingly, R McIntyre, P Melese, P Menzione, A Meschi, E Michail, G Mikamo, S Miller, M Miller, R Mimashi, T Miscetti, S Mishina, M Mitsushio, H Miyashita, S Morita, Y Moulding, S Mueller, J Mukherjee, A Muller, T Musgrave, P Nakae, LF Nakano, I Nelson, C Neuberger, D NewmanHolmes, C Nodulman, L Ogawa, S Oh, SH Ohl, KE Oishi, R Okusawa, T Pagliarone, C Paoletti, R Papadimitriou, V Pappas, SP Park, S Patrick, J Pauletta, G Paulini, M Pescara, L Peters, MD Phillips, TJ Piacentino, G Pillai, M Plunkett, R Pondrom, L Produit, N Proudfoot, J Ptohos, F Punzi, G Ragan, K Rimondi, F Ristori, L RoachBellino, M Robertson, WJ Rodrigo, T Romano, J Rosenson, L Sakumoto, WK Saltzberg, D Sansoni, A Scarpine, V Schindler, A Schlabach, P Schmidt, EE Schmidt, MP Schneider, O Sciacca, GF Scribano, A Segler, S Seidel, S Seiya, Y Sganos, G Sgolacchia, A Shapiro, M Shaw, NM Shen, Q Shepard, PF Shimojima, M Shochet, M Siegrist, J Sill, A Sinervo, P Singh, P Skarha, J Sliwa, K Smith, DA Snider, FD Song, L Song, T Spalding, J Spiegel, L Sphicas, P Stanco, L Steele, J Stefanini, A Strahl, K Strait, J Stuart, D Sullivan, G Sumorok, K Swartz, RL Takahashi, T Takikawa, K Tartarelli, F Taylor, W Teng, PK Teramoto, Y Tether, S Theriot, D Thomas, J Thomas, TL Thun, R Timko, M Tipton, P Titov, A Tkaczyk, S Tollefson, K Tollestrup, A Tonnison, J deTroconiz, JF Tseng, J Turcotte, M Turini, N Uemura, N Ukegawa, F Unal, G vandenBrink, SC Vejcik, S Vidal, R Vondracek, M Vucunic, D Wagner, RG Wagner, RL Wainer, N Walker, RC Wang, C Wang, CH Wang, G Wang, J Wang, MJ Wang, QF Warburton, A Watts, G Watts, T Webb, R Wei, C Wendt, C Wenzel, H Wester, WC Westhusing, T Wicklund, AB Wicklund, E Wilkinson, R Williams, HH Wilson, P Winer, BL Wolinski, J Wu, DY Wu, X Wyss, J Yagil, A Yao, W Yasuoka, K Ye, Y Yeh, GP Yeh, P Yin, M Yoh, J Yosef, C Yoshida, T Yovanovitch, D Yu, I Yun, JC Zanetti, A Zetti, F Zhang, L Zhang, S Zhang, W Zucchelli, S TI Reconstruction of B-0->J/psi K-S(0) and measurement of ratios of branching ratios involving B->J/psi K* and B+->J/psi K+ SO PHYSICAL REVIEW LETTERS LA English DT Article ID DECAYS; MESONS AB We report on the reconstruction of the decay mode B-0 --> J/psi K-S(0) using 19.3 pb(-1) of data collected by the Collider Detector at Fermilab in <(p)over bar p> collisions at root s = 1.8 TeV. A signal of 41.8 +/- 6.9 events, with a signal-to-background ratio of 9:1, is observed. Three additional decay modes B+ --> J/psi K+, B-0 --> J/psi K*(892)(0), and B+ --> J/psi K*(892)(+) are reconstructed. We measure three ratios of branching ratios, each one relative to the B+ --> J/psi K+ mode. We also report the ratio of decay rates, Gamma(B --> J/psi K*)/Gamma(B --> J/psi K), for the vector-vector relative to the vector-pseudoscalar modes, to be 1.32 +/- 0.23(stat) +/- 0.16(syst). C1 ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV BOLOGNA,IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60637. DUKE UNIV,DURHAM,NC 27708. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA. UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. OSAKA CITY UNIV,OSAKA 588,JAPAN. UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY. UNIV PITTSBURGH,PITTSBURGH,PA 15260. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS STATE UNIV,PISCATAWAY,NJ 08854. ACAD SINICA,TAIPEI 11529,TAIWAN. SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237. TEXAS A&M UNIV,COLLEGE STN,TX 77843. TEXAS TECH UNIV,LUBBOCK,TX 79409. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. YALE UNIV,NEW HAVEN,CT 06511. RP Abe, F (reprint author), KEK NAT LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RI Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014 OI Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816; Warburton, Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787 NR 20 TC 17 Z9 17 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2015 EP 2020 DI 10.1103/PhysRevLett.76.2015 PG 6 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400008 ER PT J AU Akiba, Y Beavis, D Berry, P Britt, HC Budick, B Chasman, C Chen, Z Chi, CY Chu, YY Cianciolo, V Cole, BA Costales, JB Crawford, HJ Cummings, JB Debbe, R Engelage, J Fung, SY Gonin, M Gushue, S Hamagaki, H Hansen, O Hayano, RS Hayashi, S Homma, S Kaneko, H Kang, J Kaufman, S Kehoe, WL Kurita, K Ledoux, RJ Levine, MJ Miake, Y Morrison, DP Morse, RJ Moskowitz, B Nagamiya, S Namboodiri, MN Nayak, TK Olness, J Parsons, CG Remsberg, LP Roehrich, D Rothschild, P Sakurai, H Sangster, TC Seto, R Soltz, R Stankus, P Steadman, SG Stephans, GSF Sung, T Tanaka, Y Tannenbaum, MJ Thomas, J Tonse, S VanDijk, JH Videbaek, F Vossnack, O Vutsadakis, V Wang, FQ Wang, Y Wegner, HE Woodruff, DS Wu, YD Yang, X Zachary, D Zajc, WA AF Akiba, Y Beavis, D Berry, P Britt, HC Budick, B Chasman, C Chen, Z Chi, CY Chu, YY Cianciolo, V Cole, BA Costales, JB Crawford, HJ Cummings, JB Debbe, R Engelage, J Fung, SY Gonin, M Gushue, S Hamagaki, H Hansen, O Hayano, RS Hayashi, S Homma, S Kaneko, H Kang, J Kaufman, S Kehoe, WL Kurita, K Ledoux, RJ Levine, MJ Miake, Y Morrison, DP Morse, RJ Moskowitz, B Nagamiya, S Namboodiri, MN Nayak, TK Olness, J Parsons, CG Remsberg, LP Roehrich, D Rothschild, P Sakurai, H Sangster, TC Seto, R Soltz, R Stankus, P Steadman, SG Stephans, GSF Sung, T Tanaka, Y Tannenbaum, MJ Thomas, J Tonse, S VanDijk, JH Videbaek, F Vossnack, O Vutsadakis, V Wang, FQ Wang, Y Wegner, HE Woodruff, DS Wu, YD Yang, X Zachary, D Zajc, WA TI Production of phi mesons in central Si-28+Au-196 collisions at 14.6A GeV/c SO PHYSICAL REVIEW LETTERS LA English DT Article ID HOT AB Production of the phi meson in central Si + Au collisions has been measured by E859 at the Brookhaven Alternating Gradient Synchrotron by selecting events with identified K+K- pairs. The mass and width of the phi, obtained from the invariant mass distribution of kaon pairs, are consistent with those of free phi mesons. The transverse mass and rapidity distributions are presented. The inverse slope parameter for an exponential fit to the invariant transverse mass distribution is 179 +/- 10 +/- 17 MeV. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92507. COLUMBIA UNIV,NEW YORK,NY 10027. NEVIS LABS,IRVINGTON,NY 10533. KYOTO UNIV,SAKYO KU,KYOTO 606,JAPAN. KYUSHU UNIV,FUKUOKA 812,JAPAN. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. MIT,CAMBRIDGE,MA 02139. NYU,NEW YORK,NY 10003. UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. RP Akiba, Y (reprint author), UNIV TOKYO,INST NUCL STUDY,TOKYO 188,JAPAN. RI seto, richard/G-8467-2011; SAKURAI, HIROYOSHI/G-5085-2014; Hayano, Ryugo/F-7889-2012; HAMAGAKI, HIDEKI/G-4899-2014; OI Hayano, Ryugo/0000-0002-1214-7806; Tannenbaum, Michael/0000-0002-8840-5314; Thomas, James/0000-0002-6256-4536 NR 22 TC 26 Z9 27 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2021 EP 2024 DI 10.1103/PhysRevLett.76.2021 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400009 ER PT J AU Ramakrishnan, E Baumann, T Azhari, A Kryger, RA Pfaff, R Thoennessen, M Yokoyama, S Beene, JR Halbert, ML Mueller, PE Stracener, DW Varner, RL Charity, RJ Dempsey, JF Sarantites, DG Sobotka, LG AF Ramakrishnan, E Baumann, T Azhari, A Kryger, RA Pfaff, R Thoennessen, M Yokoyama, S Beene, JR Halbert, ML Mueller, PE Stracener, DW Varner, RL Charity, RJ Dempsey, JF Sarantites, DG Sobotka, LG TI Giant dipole resonance built on highly excited states of Sn-120 nuclei populated by inelastic alpha scattering SO PHYSICAL REVIEW LETTERS LA English DT Article ID LEVEL-DENSITY PARAMETER; HOT ROTATING NUCLEI; EXCITATION-ENERGY; FLUCTUATIONS; SHAPE; DEPENDENCE AB High energy gamma rays from the decay of the giant resonance in hot Sn-120 nuclei were measured in the excitation energy range of 30-130 MeV. The excited nuclei were populated by inelastic scattering of a particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase monotonically with increasing excitation energy, from 5 MeV at the ground state to similar to 12 MeV at the largest excitation energy. Inelastic scattering predominantly populates low angular momentum states, and the observed width increase is thus attributed to fluctuations in the nuclear shape induced by temperature. C1 MICHIGAN STATE UNIV,NATL SUPERCOND CYCLOTRON LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130. OI Charity, Robert/0000-0003-3020-4998 NR 23 TC 83 Z9 84 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2025 EP 2028 DI 10.1103/PhysRevLett.76.2025 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400010 ER PT J AU Hayden, ME Hardy, WN AF Hayden, ME Hardy, WN TI Spin exchange and recombination in a gas of atomic hydrogen at 1.2 K SO PHYSICAL REVIEW LETTERS LA English DT Article ID FREQUENCY-SHIFTS; COLLISIONS; MASER AB We report an accurate measurement of the longitudinal spin-exchange broadening cross section for the Delta F = 1, Delta m(f) = 0 hyperfine transition of the hydrogen atom at 1.2 K. The result, <(sigma)over bar> = 0.51(2) Angstrom(2), is the first of its kind which is sufficiently accurate to clearly demonstrate disagreement with theory. Resolution of this discrepancy is relevant to the understanding of cold atom collisions and may involve a revision of the long range part of the ab initio H atom pair potentials. A by-product of our work is an improved measurement of the two body recombination rate constant k = 1.9(1) x 10(-33) cm(6)/s for the gas phase reaction H + H + He-4 --> H-2 + He-4. C1 LOS ALAMOS NATL LAB,DEPT CONDENSED MATTER & THERMAL PHYS,LOS ALAMOS,NM 87545. RP Hayden, ME (reprint author), UNIV BRITISH COLUMBIA,DEPT PHYS,6224 AGR RD,VANCOUVER,BC V6T 1Z1,CANADA. NR 22 TC 8 Z9 8 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2041 EP 2044 DI 10.1103/PhysRevLett.76.2041 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400014 ER PT J AU Kirkwood, RK Afeyan, BB Kruer, WL MacGowan, BJ Moody, JD Montgomery, DS Pennington, DM Weiland, TL Wilks, SC AF Kirkwood, RK Afeyan, BB Kruer, WL MacGowan, BJ Moody, JD Montgomery, DS Pennington, DM Weiland, TL Wilks, SC TI Observation of energy transfer between frequency-mismatched laser beams in a large-scale plasma SO PHYSICAL REVIEW LETTERS LA English DT Article ID SCATTERING; WAVES AB The observation of energy transfer between two frequency-mismatched laser beams crossing in a low-density, large-scale plasma is described. The beams cross at an angle of 53 degrees from parallel, with the average intensity in the blue beam equal to 2 x 10(15) W/cm(2). A redshifted probe beam is amplified by interaction with the blue beam and a stimulated ion acoustic wave. Significant energy is transferred to the probe when the difference in the frequencies of the two beams is comparable to the frequency of the acoustic wave. As much as 52% of the pump energy is transferred to the probe. C1 UNIV CALIF, LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. RP UNIV CALIF, LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. OI Montgomery, David/0000-0002-2355-6242 NR 18 TC 67 Z9 68 U1 0 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. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2065 EP 2068 DI 10.1103/PhysRevLett.76.2065 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400020 ER PT J AU Peng, JP Lynn, KG AsokaKumar, P Becker, DP Harshman, DR AF Peng, JP Lynn, KG AsokaKumar, P Becker, DP Harshman, DR TI Study of the SiO2-Si interface using variable energy positron two-dimensional angular correlation of annihilation radiation SO PHYSICAL REVIEW LETTERS LA English DT Article ID SILICON AB The defect structure of the SiO2-Si interface has been studied using variable energy positron two-dimensional angular correlation of annihilation radiation (2D-ACAR). As the first depth-resolved 2D-ACAR measurement, unique information about this interface was obtained: The formation and trapping of positronium atoms are observed at the microvoids (similar to 10 Angstrom in size) in the oxide and interface regions. Positron trapping and annihilation at the P-b centers in the interface region are inferred. The existence of the microvoids in the interface region is beyond the current interface model, and the results may have a profound impact on the understanding of the interface growth. C1 AT&T BELL LABS, MURRAY HILL, NJ 07974 USA. RP BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. NR 14 TC 16 Z9 16 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2157 EP 2160 DI 10.1103/PhysRevLett.76.2157 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400043 ER PT J AU Kleiner, R Katz, AS Sun, AG Summer, R Gajewski, DA Han, SH Woods, SI Dantsker, E Chen, B Char, K Maple, MB Dynes, RC Clarke, J AF Kleiner, R Katz, AS Sun, AG Summer, R Gajewski, DA Han, SH Woods, SI Dantsker, E Chen, B Char, K Maple, MB Dynes, RC Clarke, J TI Pair tunneling from c-axis YBa2Cu3O7-x to Pb: Evidence for s-wave component from microwave induced steps SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; OXIDES; STATE AB In heavily twinned crystals or films of YBa2Cu3O7-x (YBCO), d(x2-y2) pairing symmetry is expected to cause the cancellation of first-order Josephson tunneling through a YBCO-Pb tunnel junction grown on an a-b face; any residual tunneling is thus second order. As a result, microwaves at frequency f are predicted to induce steps on the current-voltage characteristic at voltages that are multiples of 1/2(hf/2e). Experimentally, steps are observed only at multiples of hf/2e, suggesting that s-wave pairings present in YBCO; however, the simultaneous presence of d-wave pairing is by no means ruled out. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093. CONDUCTUS INC,SUNNYVALE,CA 94086. RP Kleiner, R (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. NR 21 TC 118 Z9 121 U1 0 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2161 EP 2164 DI 10.1103/PhysRevLett.76.2161 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400044 ER PT J AU Sternlieb, BJ Hill, JP Wildgruber, UC Luke, GM Nachumi, B Moritomo, Y Tokura, Y AF Sternlieb, BJ Hill, JP Wildgruber, UC Luke, GM Nachumi, B Moritomo, Y Tokura, Y TI Charge and magnetic order in La0.5Sr1.5MnO4 SO PHYSICAL REVIEW LETTERS LA English DT Article AB Elastic neutron scattering measurements characterizing the charge and magnetic order in La0.5Sr1.5MnO4 are presented. Superlattice reflections corresponding to an alternating Mn+3/Mn+4 pattern with wave vector q(co) = (1/2, 1/2, 0) are observed below the charge ordering temperature, T-co 217 K. Below the Neel temperature, T-N approximate to 110 K, the magnetic moments associated with these ions form an ordered structure with dimensions 2 root 2a x 2 root 2a X 2c relative to the underlying chemical cell. C1 COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027. JOINT RES CTR ATOM TECHNOL,TSUKUBA,IBARAKI 305,JAPAN. RP Sternlieb, BJ (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Tokura, Yoshinori/C-7352-2009; Hill, John/F-6549-2011; Luke, Graeme/A-9094-2010; OI Luke, Graeme/0000-0003-4762-1173; moritomo, yutaka/0000-0001-6584-7489 NR 11 TC 274 Z9 276 U1 1 U2 10 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2169 EP 2172 DI 10.1103/PhysRevLett.76.2169 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400046 ER PT J AU Shumlak, U Hartman, CW AF Shumlak, U Hartman, CW TI Sheared flow stabilization of the m=1 kink mode in Z pinches - Reply SO PHYSICAL REVIEW LETTERS LA English DT Article C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP Shumlak, U (reprint author), PHILIPS LABS,HIGH ENERGY PLASMA DIV,KIRTLAND AFB,NM 87117, USA. OI Shumlak, Uri/0000-0002-2918-5446 NR 2 TC 5 Z9 5 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 18 PY 1996 VL 76 IS 12 BP 2199 EP 2199 DI 10.1103/PhysRevLett.76.2199 PG 1 WC Physics, Multidisciplinary SC Physics GA TZ984 UT WOS:A1996TZ98400056 ER PT J AU Friedberg, R Lee, TD Pang, Y Ren, HC AF Friedberg, R Lee, TD Pang, Y Ren, HC TI A soluble gauge model with Gribov-type copies SO ANNALS OF PHYSICS LA English DT Article ID PATH INTEGRALS AB A soluble gauge model is presented which can exhibit the typical characteristics of Gribov's gauge-equivalent copies that exist in the Coulomb gauge of QCD. From the explicit solutions of the model, we show that correct results can be obtained by including all such copies, both in the Hamiltonian approach using Schrodinger wave functions and in the path-integration formalism using Feynman rules. This leads to an alternative proposal on how to resolve the complications of gauge-equivalent copies different From the one suggested by Gribov. (C) 1996 Academic Press, Inc. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. ROCKEFELLER UNIV,NEW YORK,NY 10021. RP Friedberg, R (reprint author), COLUMBIA UNIV,NEW YORK,NY 10027, USA. NR 20 TC 35 Z9 35 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0003-4916 J9 ANN PHYS-NEW YORK JI Ann. Phys. PD MAR 15 PY 1996 VL 246 IS 2 BP 381 EP 445 DI 10.1006/aphy.1996.0032 PG 65 WC Physics, Multidisciplinary SC Physics GA TZ746 UT WOS:A1996TZ74600006 ER PT J AU Rodriguez, JA Kuhn, M Hrbek, J AF Rodriguez, JA Kuhn, M Hrbek, J TI The bonding of sulfur to a Pt(111) surface: Photoemission and molecular orbital studies SO CHEMICAL PHYSICS LETTERS LA English DT Article ID CO-ADSORPTION; PT(100); METALS; LEED AB The electronic properties of S/Pt(111) surfaces have been investigated using high-resolution photoemission spectroscopy with synchrotron radiation, and ab initio self-consistent-field calculations. The formation of S-Pt(111) bonds leads to a large decrease in the density of 5d states that the metal atoms exhibit around the Fermi level of the surface. This reduces the chemical reactivity of Pt. On Pt(111), S is bonded to two dissimilar adsorption sites (hollow and probably bridge) that show well separated S 2p binding energies and different bonding interactions. These states desorb from the surface following distinct reaction pathways. RP Rodriguez, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Hrbek, Jan/I-1020-2013 NR 34 TC 63 Z9 64 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD MAR 15 PY 1996 VL 251 IS 1-2 BP 13 EP 19 DI 10.1016/0009-2614(96)00066-8 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UD419 UT WOS:A1996UD41900003 ER PT J AU Prausnitz, JM AF Prausnitz, JM TI Molecular thermodynamics: Opportunities and responsibilities SO FLUID PHASE EQUILIBRIA LA English DT Article; Proceedings Paper CT 7th International Conference on Fluid Properties and Phase Equilibria for Chemical Process Design CY JUN 18-23, 1995 CL SNOWMASS VILLAGE, CO SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE ID LIQUID LIQUID EQUILIBRIA; SODIUM-SULFATE; NORMAL-ALKANES; EQUATION; SYSTEMS; FLUIDS; STATE; MODEL AB In chemical engineering, most applications of molecular thermodynamics have been based on various forms of the van der Waals theory of fluids augmented by chemical equilibria and by concepts from other, by-now classical theoretical concepts such as the Flory-Huggins model for polymers and the Debye-Huckel theory for electrolyte solutions. ''Extended'' van der Waals theory remains a promising method for contributing to the solution of contemporary engineering problems. While modern developments in the theory of fluids are impressive, as yet, they have had only limited impact on engineering practice, in part, because of the widening communication gap between those who do statistical mechanics and those who design and develop chemical processes and products. To realize the large potential utility of molecular thermodynamics, both classical and modern, researchers must not only exhibit more willingness to reduce their work to practice but also to exhibit multidimensionality, i.e., to relate molecular thermodynamics to other chemical engineering disciplines such as mass and heat transfer, nucleation and chemical kinetics. While the future success of molecular thermodynamics will be enhanced by progress in its own narrow domain, the promising possibilities of applied molecular thermodynamics depend crucially on its integration within the wider domain of chemical technology. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP Prausnitz, JM (reprint author), UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720, USA. NR 21 TC 4 Z9 4 U1 2 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3812 J9 FLUID PHASE EQUILIBR JI Fluid Phase Equilib. PD MAR 15 PY 1996 VL 116 IS 1-2 BP 12 EP 26 DI 10.1016/0378-3812(95)02868-4 PG 15 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA UK512 UT WOS:A1996UK51200003 ER PT J AU Shah, VM Lin, YL Bienkowski, PR Cochran, HD AF Shah, VM Lin, YL Bienkowski, PR Cochran, HD TI A generalized quartic equation of state SO FLUID PHASE EQUILIBRIA LA English DT Article; Proceedings Paper CT 7th International Conference on Fluid Properties and Phase Equilibria for Chemical Process Design CY JUN 18-23, 1995 CL SNOWMASS VILLAGE, CO SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE ID HARD CHAIN EQUATION; FLUIDS AB A generalized quartic equation of state has been developed for nonpolar and polar fluids. The quartic equation of state needs only four fluid properties to predict physical and thermodynamic properties over a wide range of temperatures and pressures. These four properties are critical volume, critical temperature, acentric factor and dipole moment. The new equation of state models the repulsive forces between molecules correctly, unlike the cubic equations of state. One of the four roots obtained by solving the equation of state is always negative, making it possible to identify the remaining three roots like the roots of a cubic equation. The quartic equation of state shows superior performance compared with the Peng-Robinson equation of state. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP Shah, VM (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,419 DOUGHERTY BLDG,KNOXVILLE,TN 37996, USA. NR 12 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3812 J9 FLUID PHASE EQUILIBR JI Fluid Phase Equilib. PD MAR 15 PY 1996 VL 116 IS 1-2 BP 87 EP 93 DI 10.1016/0378-3812(95)02875-7 PG 7 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA UK512 UT WOS:A1996UK51200010 ER PT J AU Kuehner, DE Blanch, HW Prausnitz, JM AF Kuehner, DE Blanch, HW Prausnitz, JM TI Salt-induced protein precipitation: Phase equilibria from an equation of state SO FLUID PHASE EQUILIBRIA LA English DT Article; Proceedings Paper CT 7th International Conference on Fluid Properties and Phase Equilibria for Chemical Process Design CY JUN 18-23, 1995 CL SNOWMASS VILLAGE, CO SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE ID NONIONIC POLYMER AB A molecular-thermodynamic model is developed for salt-induced protein precipitation. The model considers an aqueous solution of a globular protein as a system of interacting hard spheres in a continuum pseudo-solvent (water and salt ions). The protein molecules are considered to interact in a manner described by a set of spherically-symmetric two-body potentials of mean force. These include screened Coulombic repulsion, dispersion (van der Waals) attraction, osmotic attraction, and an attractive square-well potential intended to model specific protein-protein chemical interactions (including the hydrophobic effect and protein self-associations), Following Chiew et al. (1995), an analytical equation of state is derived using the Random Phase Approximation with the hard-sphere fluid as the reference system and a perturbation based on the protein-protein overall potential of mean force. This equation of state provides an expression for the chemical potential of the protein and determines liquid-liquid equilibria. The model is generalized for co-precipitation of several proteins. Experimental single-protein precipitation data are correlated for hen egg-white lysozyme and for alpha-chymotrypsin in concentrated aqueous solutions of ammonium sulfate. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. NR 29 TC 42 Z9 43 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3812 J9 FLUID PHASE EQUILIBR JI Fluid Phase Equilib. PD MAR 15 PY 1996 VL 116 IS 1-2 BP 140 EP 147 DI 10.1016/0378-3812(95)02882-X PG 8 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA UK512 UT WOS:A1996UK51200017 ER PT J AU Cummings, PT AF Cummings, PT TI Molecular dynamics simulation of realistic systems SO FLUID PHASE EQUILIBRIA LA English DT Article; Proceedings Paper CT 7th International Conference on Fluid Properties and Phase Equilibria for Chemical Process Design CY JUN 18-23, 1995 CL SNOWMASS VILLAGE, CO SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE ID VAPOR COEXISTENCE CURVE; SHEAR VISCOSITY; SUPERCRITICAL MIXTURES; COMPUTER-SIMULATION; CARBON-DIOXIDE; N-ALKANES; PHASE COEXISTENCE; AQUEOUS-SOLUTIONS; CRITICAL-BEHAVIOR; LIQUID RUBIDIUM AB Molecular dynamics simulation is a powerful tool for understanding and predicting thermophysical properties in systems both at equilibrium and away from equilibrium and composed of molecules ranging in complexity from spherically symmetric monatomic molecules to polymers. The widespread utilization of low-cost high performance engineering workstations has permitted the application of molecular dynamics and Monte Carlo simulation techniques to proliferate at an astounding rate. High-performance massively-parallel supercomputers (such as the Intel Paragon and IBM SP/2) permit the simulation of systems with an unprecedented degree of complexity. As computing costs continue to decline, molecular simulation of systems modeled to a high degree of accuracy promises to become an equal partner with experiment for the prediction of thermophysical properties for industrial purposes. Several examples of the use of molecular dynamics simulation to predict the properties of highly realistic systems are described. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. RP Cummings, PT (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,419 DOUGHERTY ENGN BLDG,KNOXVILLE,TN 37996, USA. RI Cummings, Peter/B-8762-2013 OI Cummings, Peter/0000-0002-9766-2216 NR 76 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3812 J9 FLUID PHASE EQUILIBR JI Fluid Phase Equilib. PD MAR 15 PY 1996 VL 116 IS 1-2 BP 237 EP 248 DI 10.1016/0378-3812(95)02892-7 PG 12 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA UK512 UT WOS:A1996UK51200028 ER PT J AU Mullica, DF Sappenfield, EL Boatner, LA AF Mullica, DF Sappenfield, EL Boatner, LA TI Monazite- and zircon-type structures of seven mixed(Ln/Ln)PO4 compounds SO INORGANICA CHIMICA ACTA LA English DT Article DE crystal structures; lanthanide complexes; mixed complexes; phosphate complexes AB The (1:1) compound ortho-phosphates (Ce/Tb), (Nd/Tb) and (Sm/Tb) crystallize in the monoclinic system conforming to space group P2(1)/n (No. 14), and the lanthanide metal atoms are nine-coordinated to oxygen atoms forming a polyhedron that is best described as a pentagonal interpenetrating tetrahedron. The (1:1) compound ortho-phosphates (Nd/Er), (Sm/Er), (Sm/Yb) and (Sm/Lu) crystallize in the tetragonal system (space group I4(1)/amd (No. 141)), and the metal atoms are eight-coordinated forming two orthogonal interpenetrating tetrahedra, a bis-bisphenoidal geometry. The phosphate group in each compound investigated is a distorted tetrahedron. Single-crystal structural analyses have been carried out for the seven indicated mixed (Ln/Ln) PO4 ortho-phosphates and coordination geometries have been determined by means of automated three-dimensional single-crystal diffractometry and full-matrix least-squares refinements. Important bond distances and angles, experimental summaries and ORTEP-II drawings related to the geometries are presented. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP Mullica, DF (reprint author), BAYLOR UNIV,DEPT CHEM,POB 97348,WACO,TX 76798, USA. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 25 TC 19 Z9 21 U1 0 U2 4 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0020-1693 J9 INORG CHIM ACTA JI Inorg. Chim. Acta PD MAR 15 PY 1996 VL 244 IS 2 BP 247 EP 252 DI 10.1016/0020-1693(95)04783-2 PG 6 WC Chemistry, Inorganic & Nuclear SC Chemistry GA UF701 UT WOS:A1996UF70100015 ER PT J AU Clark, DL Gordon, JC McFarlan, JT VincentHollis, RL Watkin, JG Zwick, BD AF Clark, DL Gordon, JC McFarlan, JT VincentHollis, RL Watkin, JG Zwick, BD TI Crystal structure of the zerovalent niobium complex Nb(eta-C(6)H(5)Me)(2) SO INORGANICA CHIMICA ACTA LA English DT Article DE crystal structures; niobium complexes; zerovalent complexes; toluene complexes ID ELECTRON-TRANSFER COMPLEXES; MOLECULAR-STRUCTURE; REACTIVITY; ALCL4; V(ETA-6-1,3,5-ME3C6H3)2; REDUCTION AB The crystal structure of Nb(eta-C(6)H(5)Me)(2) (1), prepared by co-condensation of niobium metal atoms with toluene vapor, has been determined. The toluene rings lie parallel to one another one another on either side of the niobium metal center (Nb=C=2.334(5) Angstrom av.), with methyl groups almost perfectly eclipsed. Crystal data for 1 (At -50 degrees C): orthorhombic, space group Pbcn, a=13.706(3),b=11.977(2), c=13.753(3) Angstrom,V=2257.6 Angstrom(3),D-calc=16.31 g cm(-3),Z=8,R=0.0421,R(w)=0.0612. C1 LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545. RP Clark, DL (reprint author), LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,MAIL STOP G739,LOS ALAMOS,NM 87545, USA. RI Clark, David/A-9729-2011 NR 31 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0020-1693 J9 INORG CHIM ACTA JI Inorg. Chim. Acta PD MAR 15 PY 1996 VL 244 IS 2 BP 269 EP 272 DI 10.1016/0020-1693(95)04776-X PG 4 WC Chemistry, Inorganic & Nuclear SC Chemistry GA UF701 UT WOS:A1996UF70100020 ER PT J AU Goulding, RH Zinkle, SJ Rasmussen, DA Stoller, RE AF Goulding, RH Zinkle, SJ Rasmussen, DA Stoller, RE TI Transient effects of ionizing and displacive radiation on the dielectric properties of ceramics SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTRICAL-CONDUCTIVITY; IRRADIATION; ALUMINA; MGAL2O4; AL2O3 AB A resonant cavity technique was used to measure the dielectric constant and loss tangent of ceramic insulators at a frequency near 100 MHz juring pulsed fission reactor irradiation near room temperature. Tests were performed on single crystal and several different grades of polycrystalline Al2O3, MgAl2O4, AlN, and Si3N4. Lead shielding experiments were performed for some of the ii-radiations in order Co examine the importance of gamma ray versus neutron irradiation effects. With the exception of AlN, the dielectric constant of all of the ceramics decreased slightly (<0.2% change) during the pulsed fission reactor irradiation. The dielectric constant of AlN was observed to slightly increase during irradiation, Significant transient increases in the loss tangent to values as high as 6X10(-3) occurred during pulsed reactor irradiation with peak ionizing and displacements per atom (dpa) radiation fields of 4.2X10(4) Gy/s and 2.4X10(-6) dpa/s, respectively. The loss tangent measured during irradiation for the different ceramics did not show any correlation with the preirradiation or postirradiation values. Analysis of the results indicates that the transient increases in loss tangent are due to radiation induced increases in the electrical conductivity. The loss tan!ent increases were proportional to the ionizing dose rate in all materials except for AlN, which exhibited a dose rate exponent of similar to 1.6. (C) 1996 American Institute of Physics. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP Goulding, RH (reprint author), OAK RIDGE NATL LAB,DIV FUS ENERGY,POB 2009,OAK RIDGE,TN 37831, USA. RI Stoller, Roger/H-4454-2011; Goulding, Richard/C-5982-2016; OI Goulding, Richard/0000-0002-1776-7983; Zinkle, Steven/0000-0003-2890-6915 NR 41 TC 23 Z9 23 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1996 VL 79 IS 6 BP 2920 EP 2933 DI 10.1063/1.361288 PG 14 WC Physics, Applied SC Physics GA TZ729 UT WOS:A1996TZ72900018 ER PT J AU Thurston, TR Wildgruber, U Jisrawi, N Haldar, P Suenaga, M Wang, YL AF Thurston, TR Wildgruber, U Jisrawi, N Haldar, P Suenaga, M Wang, YL TI Synchrotron x-ray scattering measurements of bulk structural properties in superconducting (Bi,Pb)(2)Sr2Ca2Cu3O10-Ag tapes SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID WIRES AB The structural properties of superconducting (Bi,Pb)(2)Sr2Ca2Cu3O10-Ag (2223) tapes have been measured using synchrotron x-ray scattering techniques. The x-ray photon energy was tuned just below the silver K absorption edge so the penetration depth was large, which allowed the measurements to be performed in a transmission geometry without removing the silver cladding. Analysis of the peaks in 2 theta scans indicates that residual (Bi,Pb)(2)Sr2CaCu2O8 (2212) superconductor starting material is present in all samples studied. The amount of 2212 varied widely among the tapes, and was not homogeneous along the length of each individual tape. Residual 2212 content increased near the ends of most samples, suggesting that 2223 phase development is sensitive to whether the superconducting material is encased in silver or not. The bulk c-axis alignment was measured in similar to 100 mono- and multifilament samples, and correlations between c-axis alignment and current carrying capacity at 77 K were found. Multifilament samples generally had better alignment than monofilament samples. The c-axis alignment along the length of the tapes was uniform, and the superconducting material within similar to 1 mu m of the Ag was better textured than the bulk of the sample. Intermediate pressings were directly shown to have an adverse affect on c-axis alignment. Finally, the evolution of texture and phase development was examined in a series of samples annealed for varying times. The 2212 starting material acquired the final c-axis alignment state after brief heating times, and only after much longer heating times did the 2212 transform into the 2223 phase. These results and their implications for improving processing procedures are discussed. (C) 1996 American Institute of Physics. C1 INTERMAGNET GEN CORP,LATHAM,NY 12110. BROOKHAVEN NATL LAB,DEPT APPL PHYS,UPTON,NY 11973. BIRZEIT UNIV,DEPT PHYS,BIRZEIT,JORDAN. RP Thurston, TR (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 9 TC 52 Z9 52 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1996 VL 79 IS 6 BP 3122 EP 3132 DI 10.1063/1.362695 PG 11 WC Physics, Applied SC Physics GA TZ729 UT WOS:A1996TZ72900046 ER PT J AU Yang, ZJ Hull, JR AF Yang, ZJ Hull, JR TI Effect of size on levitation force in a magnet/superconductor system SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNET; PLANE AB We consider a model system consisting of an infinitely long magnetic dipole line placed symmetrically above an infinitely long superconducting strip. Using the Meissner effect of superconductors, we derive analytical expressions of the levitation forces acting on the dipole line. At lowest-order approximation, we discuss the possible application of our model system to estimate the upper limit of the levitation forces in some magnetic bearing systems. In one example, the model correctly calculated the vertical vibration frequency of an experimental superconducting bearing. RP Yang, ZJ (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 20 TC 15 Z9 15 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1996 VL 79 IS 6 BP 3318 EP 3322 DI 10.1063/1.361232 PG 5 WC Physics, Applied SC Physics GA TZ729 UT WOS:A1996TZ72900077 ER PT J AU Polian, A Grimsditch, M Grzegory, I AF Polian, A Grimsditch, M Grzegory, I TI Elastic constants of gallium nitride SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HIGH-PRESSURE; SPECTROSCOPY AB The elastic constants of GaN have been determined using Brillouin scattering; in GPa they are: C-11 = 390, C-33 = 398, C-44 = 105, C-66 = 123, C-12 = 145, and C-13 = 106. Our values differ substantially from those quoted in the literature which were obtained from the determination of mean square displacement of atoms measured by x-ray diffraction. (C) 1996 American Institute of Physics. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. POLISH ACAD SCI,UNIPRESS,PL-01142 WARSAW,POLAND. RP Polian, A (reprint author), UNIV PARIS 06,4 PL JUSSIEU,F-75252 PARIS 05,FRANCE. RI Polian, Alain/E-1555-2017 OI Polian, Alain/0000-0003-2261-9114 NR 18 TC 414 Z9 420 U1 3 U2 41 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD MAR 15 PY 1996 VL 79 IS 6 BP 3343 EP 3344 DI 10.1063/1.361236 PG 2 WC Physics, Applied SC Physics GA TZ729 UT WOS:A1996TZ72900082 ER PT J AU Gong, EL Stoltzfus, LJ Brion, CM Murugesh, D Rubin, EM AF Gong, EL Stoltzfus, LJ Brion, CM Murugesh, D Rubin, EM TI Contrasting in vivo effects of murine and human apolipoprotein A-II - Role of monomer versus dimer SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID DENSITY-LIPOPROTEIN SIZE; TRANSGENIC MICE; EXPRESSION AB The role of apolipoprotein A-II (apoA-II) in high density lipoprotein (HDL) structure and metabolism has been studied previously in transgenic mice overexpressing either human or murine apoA-II. These studies have shown differences between these two groups of transgenic animals in the levels of very low density, low density, and high density lipoproteins, in the HDL particle size distribution, and in the relationship between apoA-II levels and lipoprotein levels. To determine whether these differences are due to the fact that human apoA-II is dimeric and murine apoA-II monomeric, me have examined the effects of monomeric human apoA-II (hA-IImon) in transgenic mice. Site-directed mutagenesis (Cys(6)-->Ser) was used to generate 15 transgenic founder lines of hA-IImon mice, that contained plasma hA-IImon concentrations over a 10-fold range (11 mg/dl to 185 mg/dl). The hA-IImon floated in the d less than or equal to 1.21 g/ml fraction and migrated as an apoA-II monomer by nonreducing SDS-polyacrylamide gel electrophoresis. HDL levels were not correlated with hA-IImon levels (r = 0.26); HDL particle size and size distribution, as well as very low density and low density lipoprotein levels and sizes, were unchanged compared to nontransgenic control mice. These results suggest that differences between mice overexpressing human dimeric apoA-II and those overexpressing murine apoA-II are the result of sequence differences between these two apoA-II: molecules and are not solely due to the fact that human apoA-II exists as a dimer. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR HUMAN GENOME,BERKELEY,CA 94720. FU NHLBI NIH HHS [PPG HL18574, HL46281-04] NR 13 TC 20 Z9 20 U1 2 U2 2 PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA SN 0021-9258 J9 J BIOL CHEM JI J. Biol. Chem. PD MAR 15 PY 1996 VL 271 IS 11 BP 5984 EP 5987 PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA UA363 UT WOS:A1996UA36300009 PM 8626380 ER PT J AU Brandes, HK Hartman, FC Lu, TYS Larimer, FW AF Brandes, HK Hartman, FC Lu, TYS Larimer, FW TI Efficient expression of the gene for spinach phosphoribulokinase in Pichia pastoris and utilization of the recombinant enzyme to explore the role of regulatory cysteinyl residues by site-directed mutagenesis SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID LEAF RIBULOSE-5-PHOSPHATE KINASE; YEAST 3-PHOSPHOGLYCERATE KINASE; ESCHERICHIA-COLI; PHOSPHOGLYCERATE KINASE; CO2 ASSIMILATION; ACTIVE-SITE; SULFATE ION; BINDING; PURIFICATION; SEQUENCE AB Phosphoribulokinase (PRK), unique to photosynthetic organisms, is regulated in higher plants by thioredoxin-mediated thiol-disulfide exchange in a light-dependent manner. Prior attempts to overexpress the higher plant PRK gene in Escherichia coli for structure-function studies have been hampered by sensitivity of the recombinant protein to proteolysis as well as toxic effects of the protein on the host. To overcome these impediments, we have spliced the spinach PRK coding sequence immediately downstream from the AOX1 (alcohol oxidase) promoter of Pichia pastoris, displacing the chromosomal AOX1 gene. The PRK gene is now expressed, in response to methanol, at 4-6% of total soluble protein, without significant in vivo degradation of the recombinant enzyme. This recombinant spinach PRK is purified to homogeneity by successive anion-exchange and dye-affinity chromatography and is shown to be electrophoretically and kinetically indistinguishable from the authentic spinach counterpart. Site-specific replacement of all of PRK's cysteinyl residues (both individually and in combination) demonstrates a modest catalytically facilitative role for Cys-55 (one of the regulatory residues) and the lack of any catalytic role for Cys-16 (the other regulatory residue), Cys-244, or Cys-250. Mutants with seryl substitutions at position 55 display non-hyperbolic kinetics relative to the concentration of ribulose 5-phosphate. Sulfate restores hyperbolic kinetics and enhances kinase activity, presumably reflecting conformational differences between the position 55 mutants and wild-type enzyme. Catalytic competence of the C16S-C55S double mutant proves that mere loss of free sulfhydryl groups by oxidative regulation cannot account entirely for the accompanying total inactivation. C1 OAK RIDGE NATL LAB,DIV BIOL,PROT ENGN PROGRAM,OAK RIDGE,TN 37831. UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831. NR 35 TC 28 Z9 31 U1 1 U2 5 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 MAR 15 PY 1996 VL 271 IS 11 BP 6490 EP 6496 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA UA363 UT WOS:A1996UA36300080 PM 8626451 ER PT J AU West, JB Hayes, MA Siggel, MRF Dehmer, JL Dehmer, PM Parr, AC Hardis, JE AF West, JB Hayes, MA Siggel, MRF Dehmer, JL Dehmer, PM Parr, AC Hardis, JE TI Vibrationally resolved photoelectron angular distributions and branching ratios for the carbon dioxide molecule in the wavelength region 685-795 angstrom SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID EMISSION-SPECTRUM; BAND SYSTEM; RESONANCES; CO2; PHOTOIONIZATION; AUTOIONIZATION; EXCITATION; IONIZATION; RADIATION; XENON AB Measurements of vibrational branching ratios and photoelectron angular distributions have been made in the regions of the Tanaka-Ogawa, Lindholm, and Henning series for the CO2 molecule. The behavior of these parameters was found to be sensitive to which particular resonance is excited, with considerable intensity going into vibrational modes other than the symmetric stretch. An initial analysis of some of the data taken is presented. (C) 1996 American Institute of Physics. C1 ARGONNE NATL LAB,ARGONNE,IL. NIST,GAITHERSBURG,MD 20899. RP West, JB (reprint author), DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. NR 31 TC 10 Z9 10 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1996 VL 104 IS 11 BP 3923 EP 3934 DI 10.1063/1.471249 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TY728 UT WOS:A1996TY72800007 ER PT J AU Williams, S Rahn, LA Zare, RN AF Williams, S Rahn, LA Zare, RN TI Effects of different population, orientation, and alignment relaxation rates in resonant four-wave mixing SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TRANSIENT GRATING EXPERIMENTS; LASER-INDUCED GRATINGS; 4-WAVE-MIXING SPECTROSCOPY; DECOMPOSITION METHOD; ANGULAR-DEPENDENCE; FREE JETS; OH; FLAME; FLUORESCENCE; TRANSITIONS AB We present a combined theoretical and experimental study on the effects of different population, orientation, and alignment relaxation rates in resonant four-wave mixing (RFWM). Signal generation in RFWM can be viewed as the formation of and scattering from laser-induced population, orientation, and alignment gratings. We show that the relative contributions from the upper-state and lower-state population, orientation, and alignment gratings to the observed output signal can be changed by varying the polarizations of the three input fields. A theory is developed to account for these changes in collisional environments where the three multipole moments of the total angular momentum distribution, i.e., the population, the orientation, and the alignment, relax unequally. This theory is applied to the OH radical in an atmospheric-pressure H-2/O-2/He flame for which we have measured the line profiles using high-resolution degenerate and nearly degenerate four-wave mixing. We find that orientation and alignment gratings relax more rapidly than population gratings for low rotational levels of OH in the presence of He but at essentially the same rate for high rotational levels. A discussion is presented of the importance of this effect in the interpretation of RFWM experiments. (C) 1996 American Institute of Physics. C1 SANDIA NATL LABS,COMBUST RES FACIL MS 9051,LIVERMORE,CA 94551. STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. RI Zare, Richard/A-8410-2009; OI Rahn, Larry/0000-0002-4793-1158 NR 65 TC 50 Z9 50 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1996 VL 104 IS 11 BP 3947 EP 3955 DI 10.1063/1.471250 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TY728 UT WOS:A1996TY72800009 ER PT J AU Heck, AJR Zare, RN Chandler, DW AF Heck, AJR Zare, RN Chandler, DW TI Photofragment imaging of methane SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID EXCITATION; ABINITIO; CH4; H2; D2; CH2(1A1)+H2->CH4; FLUORESCENCE; RADIATION; CHANNELS; STATE AB The photolysis of methane is studied using photofragment imaging techniques. Our study reveals that the photolysis of methane proceeds via many different pathways. The photofragment imaging technique is used to resolve and characterize these various pathways and provides therefore unique insight into the dynamical processes that govern this photodissociation. The formation of H-atom photofragments following absorption of a Lyman-alpha photon, and H-2 photofragments following absorption of two ultraviolet photons (lambda=210-230 nm) are studied. The measured H-atom photofragment images reveal that a channel that produces fast H atoms concomitant with methyl fragments is dominant in the Lyman-alpha photolysis of methane. This channel leads to an anisotropic recoil of the fragments. A secondary channel is observed leading to the formation of somewhat slower H atoms, but an unique identification of this second channel is not possible from the data. At least part of these slower H atoms are formed via a channel that produces H atoms concomitant with CH and H-2 photofragments. The recoil of these slower H atoms appears to be isotropic. The measured, state-resolved H-2(v,J), photofragment images reveal that two channels lead to H-2 photofragments from the two-photon photolysis of methane: a channel that leads to H-2 products concomitant with methylene fragments; and a channel that leads to H-2 products concomitant with CH and H fragments. H-2(v,J) rotational and vibrational distributions are measured for each of these two channels separately, The H-2 products formed via the H-2+CH2 channel are rotationally and vibrationally highly excited, whereas those formed via the H-2+CH+H channel are rotationally and vibrationally cooler. Rotational distributions of H-2 formed via the H-2+CH+H channel are well reproduced by Boltzmann distributions. Results on D-2 elimination following two-photon photolysis. of CD4 are in general similar and in qualitative agreement with the results on CH4. (C) 1996 American Institute of Physics. C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. RP Heck, AJR (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. RI Zare, Richard/A-8410-2009; Heck, Albert/D-7098-2011 OI Heck, Albert/0000-0002-2405-4404 NR 36 TC 56 Z9 56 U1 3 U2 10 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1996 VL 104 IS 11 BP 4019 EP 4030 DI 10.1063/1.471214 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TY728 UT WOS:A1996TY72800017 ER PT J AU Wang, HY LeSar, R AF Wang, HY LeSar, R TI An efficient fast-multipole algorithm based on an expansion in the solid harmonics SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID PARTICLE SIMULATIONS AB We present an efficient variant of the fast-multipole method for calculating long-range interactions in three-dimensional Coulombic systems. Using a multipole expansion based on the solid harmonics instead of the more common spherical harmonics leads to a greater increase in computational efficiency than a recently-reported fast-Fourier transform method, with none of the overhead associated with that approach. (C) 1996 American Institute of Physics. RP Wang, HY (reprint author), UNIV CALIF LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. RI LeSar, Richard/G-1609-2012 NR 19 TC 20 Z9 20 U1 2 U2 9 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 15 PY 1996 VL 104 IS 11 BP 4173 EP 4179 DI 10.1063/1.471667 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TY728 UT WOS:A1996TY72800034 ER PT J AU Vu, HX AF Vu, HX TI An adiabatic fluid electron particle-in-cell code for simulating ion-driven parametric instabilities SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID ELECTROMAGNETIC PLASMA SIMULATION; IMPLICIT; SHOCKS; MODEL AB A hybrid particle-in-cell (PIC) method is presented in which the electrons are modeled as an adiabatic fluid with an arbitrary ratio of specific heats gamma. The electromagnetic field model is based on a temporal Wentzel-Krammers-Brillouin approximation. The method is a new tool for simulating ion-driven parametric instabilities which often exist in laser-produced plasmas. The method is general and does not depend on the number of spatial dimensions. The method will model the plasma behavior correctly even in situations where the electron Debye shielding is not negligible. Test simulations of ion Landau damping in both one and two dimensions are performed, and the results are in excellent agreement with linear Vlasov theory. Test simulations of stimulated Brillouin scattering (SBS) in one and two dimensions are performed, and the results indicate that when the intensity of the driving electromagnetic field is sufficiently high, backscatter SBS is dominant at early time while side-scatter SBS is dominant at late time. For the test cases in which a high-frequency driving electromagnetic field is present, our hybrid PIC method offers a substantial saving in computational time over explicit PIC methods that require the time scale of the driving electromagnetic field to be resolved. (C) 1996 Academic Press, Inc. RP Vu, HX (reprint author), LOS ALAMOS NATL LAB,APPL THEORET & COMPUTAT DIV,LOS ALAMOS,NM 87545, USA. NR 30 TC 16 Z9 16 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD MAR 15 PY 1996 VL 124 IS 2 BP 417 EP 430 DI 10.1006/jcph.1996.0069 PG 14 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA UC248 UT WOS:A1996UC24800013 ER PT J AU Nilsen, J Fiedorowicz, H Bartnik, A Li, YL Lu, PX Fill, EE AF Nilsen, J Fiedorowicz, H Bartnik, A Li, YL Lu, PX Fill, EE TI Self-photopumped neonlike x-ray laser SO OPTICS LETTERS LA English DT Article ID BEAM-FOIL; CONFIGURATIONS AB We propose a new x-ray laser mechanism that uses radiation from the strongest 3d --> 2p Ne-like resonance line in an optically thick plasma to radiatively drive population from the Ne-like ground state to the 3d state, which then lases to two 3p states. Collisional mixing of the 3p states with nearby 3s and 3d states depopulates the lower laser states. Modeling is presented for this mechanism in Ne-like Ar, and in experiments we observe one potential 3d --> 3p lasing transition at 45.1 nm in Ne-like Ar. (C) 1996 Optical Society of America C1 MIL UNIV TECHNOL,INST OPTOELECTR,PL-01489 WARSAW,POLAND. MAX PLANCK INST QUANTUM OPT,D-85748 GARCHING,GERMANY. ACAD SINICA,SHANGHAI INST OPT & FINE MECH,SHANGHAI 201800,PEOPLES R CHINA. RP Nilsen, J (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. OI Li, Yuelin/0000-0002-6229-7490 NR 13 TC 17 Z9 17 U1 0 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD MAR 15 PY 1996 VL 21 IS 6 BP 408 EP 410 DI 10.1364/OL.21.000408 PG 3 WC Optics SC Optics GA TZ722 UT WOS:A1996TZ72200014 PM 19865421 ER PT J AU Cheriaux, G Rousseau, P Salin, F Chambaret, JP Walker, B Dimauro, LF AF Cheriaux, G Rousseau, P Salin, F Chambaret, JP Walker, B Dimauro, LF TI Aberration-free stretcher design for ultrashort-pulse amplification SO OPTICS LETTERS LA English DT Article ID UNIT MAGNIFICATION SYSTEM; OPTICAL PULSES AB A novel aberration-free pulse stretcher design is presented. This system permits the stretching of a 30-fs pulse to 300 ps and recompression to a duration of 33 fs, limited by the spectral clipping. (C) 1996 Optical Society of America C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RP Cheriaux, G (reprint author), ECOLE POLYTECH,ECOLE NATL SUPER TECH AVANCEES,LAB OPT APPL,F-91120 PALAISEAU,FRANCE. RI Walker, Barry/F-8532-2011 NR 11 TC 159 Z9 168 U1 3 U2 18 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD MAR 15 PY 1996 VL 21 IS 6 BP 414 EP 416 DI 10.1364/OL.21.000414 PG 3 WC Optics SC Optics GA TZ722 UT WOS:A1996TZ72200016 PM 19865423 ER PT J AU Hubbard, MA Salamon, MB Veal, BW AF Hubbard, MA Salamon, MB Veal, BW TI Fluctuation diamagnetism and mass anisotropy of YBa2Cu3O6+x SO PHYSICA C LA English DT Article ID II SUPERCONDUCTORS; CRITICAL-BEHAVIOR; HEAT-CAPACITY; YBA2CU3O7-DELTA; TRANSPORT; CROSSOVER; DISORDER; TC AB We have measured the fluctuation magnetization of large samples of YBa2CU3O6+x with a variety of oxygen concentrations. Magnetization is measured for several isotherms near T-c as a function of applied magnetic field parallel to the c-axis, in fields up to 7 T. The fluctuation magnetization data are consistent with the predictions of 3D-XY scaling over the full doping range studied, x = 0.7-0.9. Within the anisotropic-effective-mass model, scaling of the temperature and field dependence of the magnetization can be used to determine the mass anisotropy and also the separate variations of the in-plane and out-of-plane coherence lengths with doping level. We show that the increase of anisotropy with decreasing oxygen content is dominated by changes in xi(ab)(0), With little change in xi(c)(0). C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP Hubbard, MA (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. NR 19 TC 42 Z9 42 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD MAR 15 PY 1996 VL 259 IS 3-4 BP 309 EP 320 DI 10.1016/0921-4534(96)80003-7 PG 12 WC Physics, Applied SC Physics GA UE662 UT WOS:A1996UE66200014 ER PT J AU deMelo, CARS AF deMelo, CARS TI Quantum limits on classical permanent memories SO PHYSICAL REVIEW B LA English DT Article ID PBTIO3 ULTRAFINE PARTICLES; PHASE-TRANSITION; MAGNETIZATION; DISSIPATION; SIZE AB At the mesoscopic level a single domain of a classical permanent memory may experience considerable quantum fluctuations due to tunneling between two possible memory states, thus destroying the classical permanent memory effect. To study these quantum effects, the concrete example of a mesoscopic uniaxial ferroelectric grain is discussed, where the orientation of the electric polarization determines two possible memory states. To determine the degree of memory loss, the tunneling rate between the two polarization states is calculated at zero temperature, both in the absence and in the presence of an external static electric field. Environmental effects (phonons, defects, and surfaces) are also considered. RP deMelo, CARS (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 26 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 11 BP 6931 EP 6934 DI 10.1103/PhysRevB.53.6931 PG 4 WC Physics, Condensed Matter SC Physics GA UC740 UT WOS:A1996UC74000021 ER PT J AU Itoh, KM Muto, J Walukiewicz, W Beeman, JW Haller, EE Kim, HJ Mayur, AJ Sciacca, MD Ramdas, AK Buczko, R Farmer, JW AF Itoh, KM Muto, J Walukiewicz, W Beeman, JW Haller, EE Kim, HJ Mayur, AJ Sciacca, MD Ramdas, AK Buczko, R Farmer, JW TI Evidence for correlated hole distribution in neutron-transmutation-doped isotopically controlled germanium SO PHYSICAL REVIEW B LA English DT Article ID COMPENSATED SEMICONDUCTORS; TEMPERATURE-DEPENDENCE; SPECTRAL-LINES; DONORS; IMPURITIES; LINEWIDTHS; ABSORPTION; GAAS AB We report on low-temperature infrared-absorption spectroscopy studies of compensated p-type Ge(Ga,As) samples with varying doping compensation ratios. Previous difficulties in preparing appropriate samples are overcome by neutron-transmutation doping of high-purity, isotopically controlled germanium composed exclusively of Ge-70 and Ge-74, viz. Ge-70(x) Ge-74(1-x). With this technique, we have produced a series of crystals with compensation ratios between 0.082 and 0.87, while maintaining the net-acceptor concentration [Ga]-[As] constant at 5 x 10(14) cm(-3). The observed excitation lines of Ga accepters broaden linearly with the ionized impurity concentration due to the quadrupole interactions between Ga bound holes and the electric-field gradient. Experimental linewidths are quantitatively compared with existing theories of electric-field broadening developed in the context of donor transitions. We find excellent agreement with the theory based on the correlated distribution of ionized impurity centers. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. PURDUE UNIV,W LAFAYETTE,IN 47907. POLISH ACAD SCI,INST PHYS,PL-02668 WARSAW,POLAND. UNIV MISSOURI,COLUMBIA,MO 65211. IV KURCHATOV ATOM ENERGY INST,MOSCOW 123182,RUSSIA. RP Itoh, KM (reprint author), KEIO UNIV,DEPT INSTRUMENTAT ENGN,KOHOKU KU,3-14-1 HIYOSHI,YOKOHAMA,KANAGAWA 223,JAPAN. RI Itoh, Kohei/C-5738-2014 NR 33 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP 7797 EP 7804 DI 10.1103/PhysRevB.53.7797 PG 8 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700038 ER PT J AU Wood, DM Zunger, A AF Wood, DM Zunger, A TI Successes and failures of the k center dot p method: A direct assessment for GaAs/AlAs quantum structures SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE; ENVELOPE FUNCTIONS; BAND-STRUCTURE; K.P THEORY; SUPERLATTICES; HETEROSTRUCTURES; APPROXIMATION; FILMS; WELLS AB The kp method combined with the envelope-function approximation is the tool most commonly used to predict electronic properties of semiconductor quantum wells and superlattices. We test this approach by comparing band energies, dispersion, and wave functions for GaAs/AlAs superlattices and quantum wells as computed directly from a pseudopotential band structure and using eight-band k . p. To assure equivalent inputs, all parameters needed for the k . p treatment are extracted from calculated bulk GaAs and AlAs pseudopotential band structures. Except for large exchange splittings in the in-plane dispersion for thin superlattices, present in pseudopotential calculations but absent from the k . p results, we find generally good agreement for heterostructure hole bands within similar to 200 meV of the GaAs valence-band maximum. There are systematic errors in band energies and dispersion for deeper hole bands (all other than hh1 and lh1) and significant qualitative and quantitative errors for the conduction bands. Errors for heterostructure conduction states which are derived from the zinc-blende Gamma point diminish as length scales increase beyond similar to 20 ML, while significant errors persist for L- and X-derived states. For bulk GaAs and AlAs, eight-band k . p bands agree well with pseudopotential results very near the zinc-blende Gamma point (where k . p parameters are fit) but the first GaAs X point conduction band is similar or equal to 26 eV too high with respect to the pseudopotential result. We show that this inadequate description of the bulk band dispersion is the principal source of kp errors in these heterostructures. A wave-function projection analysis shows that k . p errors for heterostructures simply reflect corresponding errors for the bulk constituents, weighted by the amount that such bulk states participate in heterostructure states. RP NATL RENEWABLE ENERGY LAB, GOLDEN, CO 80401 USA. RI Zunger, Alex/A-6733-2013 NR 43 TC 92 Z9 92 U1 0 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP 7949 EP 7963 DI 10.1103/PhysRevB.53.7949 PG 15 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700062 ER PT J AU Wang, LS Wu, HB Desai, SR Lou, L AF Wang, LS Wu, HB Desai, SR Lou, L TI Electronic structure of small copper oxide clusters: From Cu2O to Cu2O4 SO PHYSICAL REVIEW B LA English DT Article ID PHOTOELECTRON-SPECTROSCOPY; POLYATOMIC-MOLECULES; IONIZATION; IONS AB We study the electronic structure of copper oxide clusters, Cu2Ox (x=1-4), using anion photoelectron spectroscopy and density-functional calculations. The experiment is used to successfully guide a computational search for the cluster geometries. The predicted electron affinities at the obtained cluster structures reproduce exactly the trend observed experimentally. The definitive determination of the cluster structures enables a detailed analysis of the chemical bonding and electronic structure involving Cu atoms in different oxidation states exhibited by these clusters. C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA. RICE UNIV, RICE QUANTUM INST, HOUSTON, TX 77251 USA. RICE UNIV, DEPT CHEM, HOUSTON, TX 77251 USA. RICE UNIV, DEPT PHYS, HOUSTON, TX 77251 USA. RP Wang, LS (reprint author), WASHINGTON STATE UNIV, DEPT PHYS, RICHLAND, WA 99352 USA. NR 26 TC 83 Z9 83 U1 3 U2 21 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP 8028 EP 8031 DI 10.1103/PhysRevB.53.8028 PG 4 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700071 ER PT J AU Lane, PA Wei, X Vardeny, ZV Partee, J Shinar, J AF Lane, PA Wei, X Vardeny, ZV Partee, J Shinar, J TI Optically detected magnetic-resonance study of triplet-state dynamics in C-70 SO PHYSICAL REVIEW B LA English DT Article ID ALPHA-SI-H; PHOTOPHYSICAL PROPERTIES; C-60; C60; C70; PHOTOLUMINESCENCE; PHOTOEXCITATIONS; RECOMBINATION; FLUORESCENCE; FULLERENES AB We present studies of fluorescence, phosphorescence, photoinduced absorption, and their respective optically detected magnetic resonance of C-70 molecules dispersed in polystyrene glasses. Two distinct triplet excitons are identified with principle zero-field splitting parameters (D approximate to 0.0089 and 0.0098 cm(-1), respectively) almost twice those reported in the literature (D approximate to 0.0052 cm(-1)). The first triplet is axially symmetric (E approximate to 0) and phosphorescent. Dramatic changes in the line shape and intensity of this triplet are observed as the temperature increases due to a dynamic Jahn-Teller effect. The second triplet, which is believed to arise from strained C-70 molecules, has no axial symmetry (E approximate to D/3) and is not phosphorescent. C1 US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP Lane, PA (reprint author), UNIV UTAH,DEPT PHYS,SALT LAKE CITY,UT 84112, USA. NR 28 TC 3 Z9 3 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP R7580 EP R7583 PG 4 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700002 ER PT J AU Liu, AY Quong, AA AF Liu, AY Quong, AA TI Linear-response calculation of electron-phonon coupling parameters SO PHYSICAL REVIEW B LA English DT Article ID SELF-CONSISTENT CALCULATION; LATTICE-DYNAMICS; METALS; PSEUDOPOTENTIALS; ALUMINUM; MODEL; LEAD AB An ab initio method for calculating electron-phonon coupling parameters is presented. The method is an extension of the plane-wave-based linear-response method for the calculation of lattice dynamics. Results for the mass enhancement parameter lambda and the electron-phonon spectral function alpha(2)F(omega) for Al, Pb, and Li are presented. Comparisons are made to available experimental data. C1 SANDIA NATL LABS,LIVERMORE,CA 94551. RP Liu, AY (reprint author), GEORGETOWN UNIV,DEPT PHYS,WASHINGTON,DC 20057, USA. RI Liu, Amy/E-2266-2015 OI Liu, Amy/0000-0002-2011-1854 NR 36 TC 55 Z9 55 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP R7575 EP R7579 PG 5 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700001 ER PT J AU Matsuura, AY Shen, ZX Dessau, DS Park, CH Thio, T Bennett, JW Jepsen, O AF Matsuura, AY Shen, ZX Dessau, DS Park, CH Thio, T Bennett, JW Jepsen, O TI Electronic structure and the metal-insulator transition in NiS2-xSex SO PHYSICAL REVIEW B LA English DT Article ID SYSTEM; PYRITES AB We studied the metal-insulator transition in the NiS2-xSex system in x=0 and x=0.5 single crystals using angle-resolved photoemission. A narrow band, characteristic of many-body effects, develops near E(F) for x=0.5. This feature shifts away from E(F) at the transition temperature, a discontinuous change at the metal-insulator transition in a Mott-Hubbard system. We discuss our data in the context of recent theoretical calculations of the Hubbard model. The spectra support the general finding that a narrow peak of many-body nature develops at E(F) during the insulator-to-metal transition. C1 STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305. NEC RES INST,PRINCETON,NJ 08540. MAX PLANCK INST FESTKORPERFORSCH,D-70569 STUTTGART,GERMANY. RP Matsuura, AY (reprint author), STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305, USA. NR 25 TC 36 Z9 36 U1 1 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP R7584 EP R7587 PG 4 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700003 ER PT J AU Ocko, BM Magnussen, OM Wang, JX Wandlowski, T AF Ocko, BM Magnussen, OM Wang, JX Wandlowski, T TI One-dimensional commensurate-incommensurate transition: Bromide on the Au(100) electrode SO PHYSICAL REVIEW B LA English DT Article ID X-RAY; GRAPHITE AB In an electrochemical environment, bromide adsorbed on the Au(100) surface forms a commensurate c(root 2X2 root 2)R45 degrees monolayer over a range of applied potentials. At a critical potential the bromide monolayer undergoes a transition to a uniaxial-incommensurate c(root 2Xp)R45 degrees monolayer, where p continuously decreases from 2 root 2 with increasing potential. In the incommensurate phase, the data support an atomic model with uniform compression rather than sharp, well-ordered domain walls. The quadratic scaling of the peak widths with the incommensurate component of the wave vector suggests that the incommensurate phase exhibits ''cumulative disorder.'' C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. UNIV ULM,DEPT ELECTROCHEM,D-89069 ULM,GERMANY. RP Ocko, BM (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Thomas, Wandlowski/C-7251-2009; Wang, Jia/B-6346-2011 NR 18 TC 37 Z9 38 U1 1 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD MAR 15 PY 1996 VL 53 IS 12 BP R7654 EP R7657 PG 4 WC Physics, Condensed Matter SC Physics GA UC947 UT WOS:A1996UC94700021 ER PT J AU Farrar, GR Kolb, EW AF Farrar, GR Kolb, EW TI Light photinos as dark matter SO PHYSICAL REVIEW D LA English DT Article ID NEUTRAL FERMIONS; CROSS-SECTIONS; CONSTRAINTS; CANDIDATES; MODELS; ABUNDANCES; COSMOLOGY; PARTICLES; NEUTRINOS; MASSES AB There are good reasons to consider models of low-energy supersymmetry with very light photinos and gluinos. In most of these models the lightest R-odd, color-singlet state containing a gluino, the R(0), has a mass in the 1-2 GeV range and the slightly lighter photino <(gamma)over tilde> would survive as the relic R-odd species. For the light photino masses considered here, previous calculations resulted in an unacceptable photino relic abundance. But we point out that processes other than photino self-annihilation determine the relic abundance when the photino and RO are close in mass. Including R(0) <-> <(gamma)over tilde> processes, we find that the photino relic abundance is most sensitive to the R(0)-to-<(gamma)over tilde> mass ratio, and within model uncertainties, a critical density in photinos may be obtained for an R(0)-to-<(gamma)over tilde> mass ratio in the range 1.2 to 2.2. We propose photinos in the mass range of 500 MeV to 1.6 GeV as a dark matter candidate, and discuss a strategy to test the hypothesis. C1 FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. RP Farrar, GR (reprint author), RUTGERS STATE UNIV,DEPT PHYS & ASTRON,POB 849,PISCATAWAY,NJ 08855, USA. NR 32 TC 24 Z9 24 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD MAR 15 PY 1996 VL 53 IS 6 BP 2990 EP 3001 DI 10.1103/PhysRevD.53.2990 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UC220 UT WOS:A1996UC22000012 ER PT J AU Wigley, TML Santer, BD Mitchell, JFB Charlson, RJ AF Wigley, TML Santer, BD Mitchell, JFB Charlson, RJ TI Climate change report SO SCIENCE LA English DT Letter C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. METEOROL OFF,HADLEY CTR CLIMATE PREDICT & RES,BRACKNELL RG12 2SY,BERKS,ENGLAND. UNIV WASHINGTON,DEPT ATMOSPHER SCI,SEATTLE,WA 98195. RP Wigley, TML (reprint author), NATL CTR ATMOSPHER RES,POB 3000,BOULDER,CO 80307, USA. RI Wigley, Tom/B-4705-2008; Santer, Benjamin/F-9781-2011 NR 5 TC 2 Z9 2 U1 0 U2 3 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 15 PY 1996 VL 271 IS 5255 BP 1481 EP 1482 DI 10.1126/science.271.5255.1481 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TZ983 UT WOS:A1996TZ98300006 PM 17840519 ER PT J AU Perelson, AS Neumann, AU Markowitz, M Leonard, JM Ho, DD AF Perelson, AS Neumann, AU Markowitz, M Leonard, JM Ho, DD TI HIV-1 dynamics in vivo: Virion clearance rate, infected cell life-span, and viral generation time SO SCIENCE LA English DT Article ID IMMUNODEFICIENCY-VIRUS TYPE-1 AB A new mathematical model was used to analyze a detailed set of human immunodeficiency virus-type 1 (HIV-1) viral load data collected from five infected individuals after the administration of a potent inhibitor of HIV-1 protease. Productively infected cells were estimated to have, on average, a life-span of 2.2 days (half-life t(1/2) = 1.6 days), and plasma virions were estimated to have a mean life-span of 0.3 days (t(1/2) = 0.24 days). The estimated average total HIV-1 production was 10.3 x 10(9) virions per day, which is substantially greater than previous minimum estimates. The results also suggest that the minimum duration of the HIV-1 life cycle in vivo is 1.2 days on average, and that the average HIV-1 generation time-defined as the time from release of a virion until it infects another cell and causes the release of a new generation of viral particles-is 2.6 days, These findings on viral dynamics provide not only a kinetic picture of HIV-1 pathogenesis, but also theoretical principles to guide the development of treatment strategies. C1 AARON DIAMOND AIDS RES CTR,NEW YORK,NY 10016. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. ABBOTT LABS,DIV PHARMACEUT PROD,ABBOTT PK,IL 60064. RI Yang, Chen/G-1379-2010 FU NCRR NIH HHS [RR06555]; NIAID NIH HHS [AI27742, N01 AI45218] NR 15 TC 2182 Z9 2244 U1 16 U2 127 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD MAR 15 PY 1996 VL 271 IS 5255 BP 1582 EP 1586 DI 10.1126/science.271.5255.1582 PG 5 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TZ983 UT WOS:A1996TZ98300041 PM 8599114 ER PT J AU Noh, H Flanagan, TB Balasubramaniam, R Eastman, JA AF Noh, H Flanagan, TB Balasubramaniam, R Eastman, JA TI Characterization of internal oxidation and permeability of oxygen in Pd/Al alloys using hydrogen isotherms SO SCRIPTA MATERIALIA LA English DT Article ID OXIDE C1 UNIV VERMONT,DEPT CHEM,BURLINGTON,VT 05405. INDIAN INST TECHNOL,DEPT MAT & MET ENGN,KANPUR 208016,UTTAR PRADESH,INDIA. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP Noh, H (reprint author), UNIV VERMONT,MAT SCI PROGRAM,BURLINGTON,VT 05405, USA. RI Eastman, Jeffrey/E-4380-2011; OI Eastman, Jeff/0000-0002-0847-4265 NR 9 TC 18 Z9 18 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6462 J9 SCRIPTA MATER JI Scr. Mater. PD MAR 15 PY 1996 VL 34 IS 6 BP 863 EP 868 DI 10.1016/1359-6462(95)00614-1 PG 6 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA TW216 UT WOS:A1996TW21600004 ER PT J AU Smith, DA Rashid, H Chakravarthy, RS Agboatwalla, AM Patil, AA Bao, Z Imam, N Smith, SW Baran, JE Jackel, JL Kallman, J AF Smith, DA Rashid, H Chakravarthy, RS Agboatwalla, AM Patil, AA Bao, Z Imam, N Smith, SW Baran, JE Jackel, JL Kallman, J TI Acousto-optic switch with a near rectangular passband for WDM systems SO ELECTRONICS LETTERS LA English DT Article DE wavelength division multiplexing; acousto-optical switches AB The authors describe the most rectangular passband yet reported for an acousto-optic wavelength-routing switch. The device is a multicycle SAW directional-coupler-weighted AOTF, fabricated on XY lithium niobate, with a -3dB width of 2.52nm and a -20dB width of 0.89nm. For comparison, an ideal apodised AOTF with the same 3dB width would have a -20dB width of only 0.33nm. C1 BELLCORE,RED BANK,NJ 07701. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA. RP Smith, DA (reprint author), CASE WESTERN RESERVE UNIV,DEPT ELECT ENGN & APPL PHYS,GLENNAN 709B,10900 EUCLID AVE,CLEVELAND,OH 44106, USA. NR 8 TC 2 Z9 2 U1 0 U2 1 PU IEE-INST ELEC ENG PI HERTFORD PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY SN 0013-5194 J9 ELECTRON LETT JI Electron. Lett. PD MAR 14 PY 1996 VL 32 IS 6 BP 542 EP 543 DI 10.1049/el:19960355 PG 2 WC Engineering, Electrical & Electronic SC Engineering GA UL772 UT WOS:A1996UL77200028 ER PT J AU Ho, LL MacKerell, AD Bash, PA AF Ho, LL MacKerell, AD Bash, PA TI Proton and hydride transfers in solution: Hybrid QM/MM free energy perturbation study SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID MALATE-DEHYDROGENASE; CONDENSED PHASE; SIMULATIONS; DYNAMICS; QUANTUM; LYSOZYME; COMPLEX; MODELS; WATER AB A hybrid quantum and molecular mechanical (QM/MM) free energy perturbation (FEP) method is implemented in the context of molecular dynamics (RID). The semiempirical quantum mechanical (QM) Hamiltonian (Austin Model 1) represents solute molecules, and the molecular mechanical (MM) CHARMM force field describes the water solvent. The QM/MM FEP method is used to calculate the free energy changes in aqueous solution for (1) a proton transfer from methanol to imidazole and (2) a hydride transfer from methoxide to nicotinamide. The QM/MM interaction energies between the solute and solvent are calibrated to emulate the solute-solvent interaction energies determined at the Hartee-Fock 6-31G(d) level of ab initio theory. The free energy changes for the proton and hydride transfers are calculated to be 15.1 and -6.3 kcal/mol, respectively, which compare favorably with the corresponding experimental values of 12.9 and -7.4 kcal/mol. An estimate of the reliability of the calculations is obtained through the computation of the forward (15.1 and -6.3 kcal/mol) and backward (-14.1 and 9.1 kcal/mol) free energy changes. The reasonable correspondence between these two independent calculations suggests that adequate phase space sampling is obtained along the reaction pathways chosen to transform the proton and hydride systems between their respective reactant and product states. C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. YALE UNIV,DEPT PHYS,JW GIBBS LAB,NEW HAVEN,CT 06511. UNIV MARYLAND,SCH PHARM,DEPT PHARMACEUT SCI,BALTIMORE,MD 21230. OI MacKerell, Alex/0000-0001-8287-6804 NR 28 TC 37 Z9 37 U1 1 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 14 PY 1996 VL 100 IS 11 BP 4466 EP 4475 DI 10.1021/jp952578e PG 10 WC Chemistry, Physical SC Chemistry GA UA005 UT WOS:A1996UA00500021 ER PT J AU Chen, PY Holroyd, RA AF Chen, PY Holroyd, RA TI Effect of pressure on the e(-)+pyrimidine reversible arrow pyrimidine(-) equilibrium in nonpolar solvents SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID NON-POLAR LIQUIDS; ELECTRON-ATTACHMENT; 2,2-DIMETHYLBUTANE; AFFINITIES; IONS; CO2 AB The thermodynamics of the equilibrium reaction e(-) + pyrimidine reversible arrow pyrimidine(-) was studied in tetramethylsilane (TMS) and 2,2,4-trimethylpentane (TMP) as solvents. In hexane, only the forward attachment reaction could be observed. The attachment rate constants (k(a)) increase with temperature in all solvents. The equilibrium shifts to the right with increasing pressure because of the large, negative reaction volumes (-200 to -330 cm(3)/mol). The volume changes are consistent with electrostriction by the pyrimidine anion when a glass shell of solvent molecules is included. The free energy of reaction at 298 K is -0.43 eV in tetramethylsilane at 1 bar and -0.70 eV in 2,2,4-trimethylpentane at 150 bar. The solution free energies indicate the gas-phase (adiabatic) electron affinity of pyrimidine is -0.24 eV. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 31 TC 17 Z9 17 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 14 PY 1996 VL 100 IS 11 BP 4491 EP 4495 DI 10.1021/jp9531321 PG 5 WC Chemistry, Physical SC Chemistry GA UA005 UT WOS:A1996UA00500025 ER PT J AU Rajh, T Ostafin, AE Micic, OI Tiede, DM Thurnauer, MC AF Rajh, T Ostafin, AE Micic, OI Tiede, DM Thurnauer, MC TI Surface modification of small particle TiO2 colloids with cysteine for enhanced photochemical reduction: An EPR study SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ELECTRON-PARAMAGNETIC-RES; PULSE-RADIOLYSIS; POTENTIALS; OXIDATION; MECHANISM; RADICALS; WATER; IONS AB Surface complexation of colloidal titanium dioxide nanoparticles (40-60 Angstrom) with cysteine was investigated by electron paramagnetic resonance (EPR) and infrared (diffuse reflectance infrared Fourier transform-DRIFT) spectroscopies. Cysteine was found to bind strongly to the TiO2 surface, resulting in formation of new trapping sites where photogenerated electrons and holes are localized, Illumination of cysteine-modified TiO2 at 77 K resulted in formation of cysteine radicals with the unpaired electron localized on the carboxyl group. Upon warming to 150 K, these radicals are transformed into sulfur-centered radicals as observed by EPR spectroscopy. We have demonstrated the existence of two surface Ti(III) centers on cysteine-modified TiO2 particles having different extents of tetragonal distortion of the octahedral crystal field. Upon addition of lead ions, a new complex of cysteine that bridges surface titanium atoms and lead ions was detected by IR spectroscopy. Illumination of lead/cysteine-modified TiO2 did not result in the formation of sulfur-centered radicals. Instead, a symmetrical, lattice defect type EPR signal for trapped holes was observed. Addition of methanol to this system resulted in the formation of a . CH2OH radical at 8.2 K. After the temperature was raised to 120 K, doubling of the signal associated with electrons trapped at the particle surface Ti(III)(surf)) was observed. On further increase of the temperature to 200 K, the EPR signal for trapped electrons disappeared due to the reduction of Pb2+ ions, and metallic lead precipitated at room temperature. Conversion of photogenerated holes in the presence of methanol into trapped electrons can lead to the doubled quantum efficiency of metallic lead precipitation. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 51 TC 189 Z9 192 U1 4 U2 38 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 14 PY 1996 VL 100 IS 11 BP 4538 EP 4545 DI 10.1021/jp952002p PG 8 WC Chemistry, Physical SC Chemistry GA UA005 UT WOS:A1996UA00500033 ER PT J AU Andersen, OS Feldberg, SW AF Andersen, OS Feldberg, SW TI The heterogeneous collision velocity for hydrated ions in aqueous solutions is similar to 10(4) cm/s SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID GRAMICIDIN-A CHANNELS; LIPID BILAYER; MOVEMENT; POTENTIALS; MEMBRANES; SODIUM; WATER; NMR AB The heterogeneous collision velocity v(o), units of centimeters/second) is the average velocity of a solution particle toward a surface. v(o) thus defines the maximum flux of the particles to the surface. Einstein argued that v(o) in condensed phases and in gases may be deduced in a precisely analogous manner and that v(o) in aqueous solution therefore should be similar to 10(4) cm/s (for particles with a mass of 100 Da). Values of v(o) for several aqueous monovalent cations (Na+, K+, Rb+, Cs+ and NH4+) were estimated from steady-state limiting current measurements through single gramicidin A channels spanning lipid bilayer membranes. The collisional and diffusional current components were separated by making use of the different viscosities of H2O and D2O solutions. The transfer of ions from the bulk solution to the channel entrance is modeled using a hemispherical entrance and an extension of the classical analysis of diffusion to a (hemi)sphere in which we relax the assumption that the jump distance (associated with three-dimensional diffusion of an ion in the bulk phase) be small compared to the hemispherical capture radius. Our estimate of v(o) agrees well with the prediction of Einstein. We therefore conclude that ion dehydration (only partially hydrated ions can pass through the gramicidin A channel) cannot be a rate-controlling step-a conclusion that is consistent with known rate constants for water exchange for these ions. C1 BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. RP Andersen, OS (reprint author), CORNELL UNIV MED COLL, DEPT PHYSIOL & BIOPHYS, NEW YORK, NY 10021 USA. NR 34 TC 28 Z9 29 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 14 PY 1996 VL 100 IS 11 BP 4622 EP 4629 DI 10.1021/jp952687t PG 8 WC Chemistry, Physical SC Chemistry GA UA005 UT WOS:A1996UA00500045 ER PT J AU Suzuki, S Shimakura, N Kimura, M AF Suzuki, S Shimakura, N Kimura, M TI Molecular-orbital treatment of electron capture in an external magnetic field: Collisions of B4+ ions with H atoms SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID CHARGE-TRANSFER; ENERGY; APPROXIMATION; COUPLINGS AB A semiclassical close-coupling equation is formulated for the electron-capture process in ion-atom collisions under the influence of an external magnetic field. The direction of the magnetic field is chosen to be parallel to an initial velocity vector of a projectile. As we deal with the case for the magnetic field strength less than the critical field strength (2.35 x 10(5) T), the second- and higher-order terms for the magnetic field are neglected. Eigenfunctions in zero magnetic field are employed as a basis set for expansion. The equation obtained is the same in structure as that at zero magnetic field except that the relative velocity v is replaced by the scaled velocity v(B). Effects due to the magnetic field are: (i) dynamical couplings, similar to rotational couplings and (ii) the Zeeman splitting of energies. The phase factor due to the gauge transformation is similar in form to the electron-translation factor. We apply this close-coupling equation to a study of electron-capture processes in a singlet (B4+ + H) system at 0 less than or equal to B less than or equal to 2.35 x 10(4) T, for which the zero-field results have been reported earlier (Shimakura et al 1993). Calculated results show that the total electron-capture cross section increases by about 30% at the magnetic field B = 1.17 x 10(4) T compared to that at zero magnetic field at collision energy E = 122.5 eV/amu. At low collision energies below 500 eV/amu, the effect of the magnetic field becomes dominant over that of rotational couplings at 10(4) T. Because the magnetic field removes the degeneracy of electronic energies for Pi (and Delta) states by the Zeeman effect, transition probabilities for Pi(+) and Pi(-) (and also Delta(+) and Delta(-)) states differ significantly. The transition probabilities oscillate with time even if the collision pair separates considerably, particularly for B3+(1s3p(0,+/-1)) and B3+(1s3d(0,+/-1,+/-2)) states because of the magnetic field. C1 NIIGATA UNIV,FAC SCI,NIIGATA 95021,JAPAN. ARGONNE NATL LAB,ARGONNE,IL 60439. RICE UNIV,DEPT PHYS,HOUSTON,TX 77251. RP Suzuki, S (reprint author), NIIGATA UNIV,GRAD SCH SCI & TECHNOL,NIIGATA 95021,JAPAN. NR 22 TC 8 Z9 8 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD MAR 14 PY 1996 VL 29 IS 5 BP 1063 EP 1078 DI 10.1088/0953-4075/29/5/015 PG 16 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA UB922 UT WOS:A1996UB92200015 ER PT J AU Rabinovich, D Haswell, CM Scott, BL Miller, RL Nielsen, JB Abney, KD AF Rabinovich, D Haswell, CM Scott, BL Miller, RL Nielsen, JB Abney, KD TI New dicarbollide complexes of uranium SO INORGANIC CHEMISTRY LA English DT Article ID CRYSTAL-STRUCTURE; CHEMISTRY; OXIDE AB A series of new uranium complexes incorporating dicarbollide ligands (C2B9H112-) has been synthesized. The uranium(TV) bis(dicarbollide) complex [Li(THF)(4)](2)- [U(eta(5)-C2B9H11)(2)Br-2] was obtained from the reaction of UBr4(NCMe)(4) with 2 equiv of Li2C2B9H11 in THF, and its structure determined by single-crystal X-ray diffraction. Similarly, the uranium(III) complexes [U(eta(5)-C2B9H11)I-2(THF)(2)](-) and [U(eta(5)-C2B9H11)(2)I- (THF)](2-) were isolated from the reactions of UI3-(TRF)(4) with different dicarbollide salts, and the structure of the related dimethyldicarbollide complex [(Ph(3)P)(2)N][U(eta(5)-C(2)Me(2)B(9)H(9))I-2(THF)(2)] determined by X-ray crystallography. C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545. RI Chamberlin, Rebecca/A-1335-2011; Scott, Brian/D-8995-2017 OI Chamberlin, Rebecca/0000-0001-6468-7778; Scott, Brian/0000-0003-0468-5396 NR 23 TC 15 Z9 15 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 13 PY 1996 VL 35 IS 6 BP 1425 EP & DI 10.1021/ic951444c PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA UA169 UT WOS:A1996UA16900005 ER PT J AU Dong, ZC Corbett, JD AF Dong, ZC Corbett, JD TI A(15)Tl(27) (A=Rb,Cs): A structural type containing both isolated clusters and condensed layers based on the Tl-11 fragment. Syntheses, structure, properties, and band structure SO INORGANIC CHEMISTRY LA English DT Article ID CRYSTAL-STRUCTURE; INDIUM CLUSTERS; NETWORK; SYSTEMS; K8IN11 AB The isomorphous title compounds (and the ordered substitutional Rb14CsTl27) are obtained directly from reactions of the elements in sealed Ta below similar to 330 degrees C. Refinements of single-crystal data for the three established a structure with alternate layers of isolated pentacapped trigonal prismatic Tl-11(7-) (D-3h) ions and condensed (2.)(infinity)[Tl-16(8-)] networks that are separated by cations. The condensed layer consists of Tl-11 units that share prismatic edges and ate interbridged through waist-capping atoms (Tl6/2Tl3Tl2). (Rb15Tl27: P (6) over bar 2m, Z = 1, a = 10.3248(6) Angstrom, c = 17.558(2) Angstrom.) The rubidium phase is a poor metal (p(293) similar to 34 mu Omega.cm) and is Pauli-paramagnetic. Extended Huckel band calculations indicate partially filled bands and a non-zero DOS at E(F), consistent with the observed metallic behavior, although appropriate cation tuning or modest anion doping should provide a Zintl phase. The band structure and COOP curves are also used to rationalize the distortion of the Tl-11 unit on condensation and the critical role of the interfragment bonds between waist-capping atoms in stabilizing the layer. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 40 TC 23 Z9 23 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 13 PY 1996 VL 35 IS 6 BP 1444 EP 1450 DI 10.1021/ic951086d PG 7 WC Chemistry, Inorganic & Nuclear SC Chemistry GA UA169 UT WOS:A1996UA16900010 ER PT J AU Meier, M Sun, J Wishart, JF vanEldik, R AF Meier, M Sun, J Wishart, JF vanEldik, R TI Comparative kinetic analysis of reversible intermolecular electron-transfer reactions between a series of pentaammineruthenium complexes and cytochrome c SO INORGANIC CHEMISTRY LA English DT Article ID IONIC-STRENGTH DEPENDENCE; L-ASCORBIC-ACID; HIGH-PRESSURE; AQUEOUS-SOLUTION; RATE CONSTANTS; HORSE HEART; OXIDATION; ACTIVATION; REDUCTION; TEMPERATURE AB In this kinetic and thermodynamic study, the reversible outer-sphere electron-transfer reactions between a series of Ru(NH3)(5)L(3+/2+) complexes (L = etpy, py, lut) (etpy = 4-ethylpyridine; py = pyridine; lut = 3,5-lutidine) and cytochrome c were investigated as a function of ionic strength, buffer, pH, temperature, and pressure. Due to the low driving forces of these systems, it was possible to study all the reactions in both redox directions. The observed rate constants for various L are correlated on the basis of the ability of ligands on the ruthenium complex to penetrate the heme groove on cytochrome c. The measurements as a function of pressure enabled the construction of volume profiles for all investigated systems. The activation volumes for all of these processes are very similar: between -14.9 and -17.8 cm(3) mol(-1) for the reduction and between +14.7 and +17.8 cm(3) mol(-1) for the oxidation of the protein by Ru(MH(3))(5)L(2+/3+), respectively. The overall reaction volume varies between 27 and 35 cm(3) mol(-1), from which it follows that the transition state lies exactly halfway between reactant and product states on a volume basis in all cases. There is good agreement throughout between kinetic and thermodynamic data. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. UNIV ERLANGEN NURNBERG,INST INORGAN CHEM,D-91058 ERLANGEN,GERMANY. RI Wishart, James/L-6303-2013 OI Wishart, James/0000-0002-0488-7636 NR 49 TC 38 Z9 38 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD MAR 13 PY 1996 VL 35 IS 6 BP 1564 EP 1570 DI 10.1021/ic9413528 PG 7 WC Chemistry, Inorganic & Nuclear SC Chemistry GA UA169 UT WOS:A1996UA16900027 ER PT J AU Harel, M Quinn, DM Nair, HK Silman, I Sussman, JL AF Harel, M Quinn, DM Nair, HK Silman, I Sussman, JL TI The X-ray structure of a transition state analog complex reveals the molecular origins of the catalytic power and substrate specificity of acetylcholinesterase SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID ACID-BASE CATALYSIS; REACTION DYNAMICS; DISPLACEMENT-REACTIONS; MAGNETIC-RESONANCE; SERINE PROTEASES; AQUEOUS-SOLUTION; GAS-PHASE; BINDING; HYDROLYSIS; INHIBITORS AB The structure of a complex of Torpedo calfornica acetylcholinesterase with the transition state analog inhibitor m-(N,N,N-trimethylammonio)-2,2,2-trifluoroacetophenone has been solved by X-ray crystallographic methods to 2.8 Angstrom resolution. Since the inhibitor binds to the enzyme about 10(10)-fold more tightly than the substrate acetylcholine, this complex provides a visual accounting of the enzyme-ligand interactions that provide the molecular basis for the catalytic power of acetylcholinesterase. The enzyme owes about 8 kcal mol(-1) of the 18 kcal mol(-1) of free energy of stabilization of the acylation transition state to interactions of the quaternary ammonium moiety with three water molecules, with the carboxylate side chain of E199, and with the aromatic side chains of W84 and F330. The carbonyl carbon of the trifluoroketone function interacts covalently with S200 of the S200-H440-E327 catalytic triad. The operation of this triad as a general acid-base catalytic network probably provides 3-5 kcal mol(-1) of the free energy of stabilization of the transition state. The remaining 5-7 kcal mol(-1) of transition state stabilization probably arises from tripartite hydrogen bonding between the incipient oxyanion and the NH functions of G118, G119, and A201. The acetyl ester hydrolytic specificity of the enzyme is revealed by the interaction of the CF3 function of the transition state analog with a concave binding site comprised of the residues G119, W233, F288, F290, and F331. The highly geometrically convergent array of enzyme-ligand interactions visualized in the complex described herein envelopes the acylation transition state and sequesters it from solvent, this being consistent with the location of the active site at the bottom of a deep and narrow gorge. C1 WEIZMANN INST SCI, DEPT BIOL STRUCT, IL-76100 REHOVOT, ISRAEL. WEIZMANN INST SCI, DEPT NEUROBIOL, IL-76100 REHOVOT, ISRAEL. BROOKHAVEN NATL LAB, DEPT BIOL, UPTON, NY 11973 USA. BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA. UNIV IOWA, DEPT CHEM, IOWA CITY, IA 52242 USA. OI Sussman, Joel/0000-0003-0306-3878 NR 79 TC 279 Z9 281 U1 5 U2 33 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 MAR 13 PY 1996 VL 118 IS 10 BP 2340 EP 2346 DI 10.1021/ja952232h PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA UA029 UT WOS:A1996UA02900005 ER PT J AU Glendening, ED AF Glendening, ED TI Natural energy decomposition analysis: Explicit evaluation of electrostatic and polarization effects with application to aqueous clusters of alkali metal cations and neutrals SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID CONFIGURATION-INTERACTION CALCULATIONS; MOLECULAR WAVE-FUNCTIONS; BENCHMARK CALCULATIONS; SYSTEMATIC SEQUENCES; DIATOMIC HYDRIDES; BASIS-SETS; HYDROGEN; WATER; POTENTIALS; HYDRATION AB Natural energy decomposition analysis (NEDA) is extended to calculate electrostatic and polarization contributions. NEDA is a Hartree-Fock-based approach that facilitates the calculation of the electrostatic, polarization, charge transfer, exchange, and deformation components of intermolecular interactions. Analysis of the aqueous clusters of the alkali metal cations, M(+)(H2O)(n) (n = 1-4), demonstrates the reasonable behavior of the NEDA components and dipole moments with changes in geometry and coordination. In general, the electrostatic and polarization components behave as anticipated from a classical treatment based on point charges, dipoles, and polarizabilities. Extended basis set applications demonstrate the high numerical stability of the method whereas comparison calculations with the Morokuma analysis show contrastingly poor basis set convergence. The popular 6-31+G* basis set yields a binding energy for Li+(H2O) in good agreement with the estimated complete basis set (CBS) limit. However, comparison of the 6-31+G* and CBS NEDA results reveals that this agreement is fortuitous, relying on a cancellation of errors that stem from the inability of this basis set to accurately describe the dipole moment and polarizability of water. Representative calculations are also presented for open-shell clusters Na(H2O)(n) (n = 1-4) at the unrestricted-Hartree-Fock level. C1 INDIANA STATE UNIV, DEPT CHEM, TERRE HAUTE, IN 47809 USA. RP Glendening, ED (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. NR 42 TC 130 Z9 130 U1 0 U2 4 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 MAR 13 PY 1996 VL 118 IS 10 BP 2473 EP 2482 DI 10.1021/ja951834y PG 10 WC Chemistry, Multidisciplinary SC Chemistry GA UA029 UT WOS:A1996UA02900020 ER PT J AU Luecke, HF Arndtsen, BA Burger, P Bergman, RG AF Luecke, HF Arndtsen, BA Burger, P Bergman, RG TI Synthesis of fischer carbene complexes of iridium by C-H bond activation of methyl and cyclic ethers: Evidence for reversible alpha-hydrogen migration SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID HYDRIDE; REACTIVITY; RHODIUM; CARBON C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 20 TC 90 Z9 90 U1 0 U2 14 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAR 13 PY 1996 VL 118 IS 10 BP 2517 EP 2518 DI 10.1021/ja953437t PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA UA029 UT WOS:A1996UA02900033 ER PT J AU Christen, HM Boatner, LA Budai, JD Chisholm, MF Gea, LA Marrero, PJ Norton, DP AF Christen, HM Boatner, LA Budai, JD Chisholm, MF Gea, LA Marrero, PJ Norton, DP TI The growth and properties of epitaxial KNbO3 thin films and KNbO3/KTaO3 superlattices SO APPLIED PHYSICS LETTERS LA English DT Article ID DEPOSITION; CRYSTALS AB Potassium niobate (KNbO3) thin films and potassium niobate/tantalate (KNbO3/KTaO3) superlattices have been grown on KTaO3 (001) substrates by pulsed loser deposition. The thin-film structures were analyzed by Rutherford backscattering/ion-channeling techniques, x-ray theta-2 theta and Phi scans, and both conventional and Z-contrast scanning transmission electron microscopy. Excellent film flatness and crystallinity are evidenced by these techniques. At room temperature, the KNbO3 films are characterized by an orthorhombic structure which differs from that of bulk KNbO3. The interfaces between the layers in the KNbO3/KTaO3 superlattice structures were found to be compositionally sharp on an atomic scale. (C) 1996 American Institute of Physics. C1 UNIV PUERTO RICO,DEPT FIS,MAYAGUEZ,PR 00681. RP Christen, HM (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. RI Christen, Hans/H-6551-2013; Boatner, Lynn/I-6428-2013; Budai, John/R-9276-2016 OI Christen, Hans/0000-0001-8187-7469; Boatner, Lynn/0000-0002-0235-7594; Budai, John/0000-0002-7444-1306 NR 19 TC 79 Z9 79 U1 3 U2 27 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 11 PY 1996 VL 68 IS 11 BP 1488 EP 1490 DI 10.1063/1.116263 PG 3 WC Physics, Applied SC Physics GA TZ291 UT WOS:A1996TZ29100016 ER PT J AU Jasinski, J Chen, Y Washburn, J LilientalWeber, Z Tan, HH Jagadish, C Kaminska, M AF Jasinski, J Chen, Y Washburn, J LilientalWeber, Z Tan, HH Jagadish, C Kaminska, M TI Recrystallization of high energy As-implanted GaAs studied by transmission electron microscopy SO APPLIED PHYSICS LETTERS LA English DT Article ID LAYERS AB Ion implantation damage and the regrowth process during thermal annealing of 2 MeV As-ion-implanted GaAs were studied by transmission electron microscopy. With low-temperature annealing, a high denisty of stacking faults was formed during the recrystallization process, but they were rarely observed with high-temperature annealing. At intermediate temperatures, a much lower denisty of stacking faults was generated at the upper interface between the buried amorphous layer and the crystal than that at the lower interface, where a higher concentration of as-implanted arsenic exists. Based on the observed experimental results, an atomic model is proposed to explain the formation of stacking faults induced by As clusters. (C) 1996 American Institute of Physics. C1 AUSTRALIAN NATL UNIV,RES SCH PHYS SCI & ENGN,DEPT ELECTR MAT ENGN,CANBERRA,ACT 0200,AUSTRALIA. WARSAW UNIV,INST PHYS EXPTL,PL-00681 WARSAW,POLAND. RP Jasinski, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720, USA. RI Tan, Hark Hoe/M-1148-2015 OI Tan, Hark Hoe/0000-0002-7816-537X NR 15 TC 7 Z9 7 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 11 PY 1996 VL 68 IS 11 BP 1501 EP 1503 DI 10.1063/1.115679 PG 3 WC Physics, Applied SC Physics GA TZ291 UT WOS:A1996TZ29100021 ER PT J AU Chen, AL Walukiewicz, W Duxstad, K Haller, EE AF Chen, AL Walukiewicz, W Duxstad, K Haller, EE TI Migration of compensating defects in p-type ZnSe during annealing SO APPLIED PHYSICS LETTERS LA English DT Article ID DETECTED MAGNETIC-RESONANCE; MOLECULAR-BEAM EPITAXY; GROWTH AB We annealed p-type, nitrogen-doped ZnSe grown by molecular-beam epitaxy and subsequently characterized the samples by photoluminescence spectroscopy, capacitance-voltage profiling, and secondary ion mass spectroscopy. We found that the decrease in active acceptor concentration upon annealing stems from compensation by defects that originate from the surface. By fitting the nitrogen acceptor profiles with solutions of the diffusion equation, we estimate the migration energy of the compensating defect to be 4.0+/-0.3 eV. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP Chen, AL (reprint author), LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV SCI MAT,BERKELEY,CA 94720, USA. NR 15 TC 13 Z9 13 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 11 PY 1996 VL 68 IS 11 BP 1522 EP 1524 DI 10.1063/1.115686 PG 3 WC Physics, Applied SC Physics GA TZ291 UT WOS:A1996TZ29100028 ER PT J AU Gerber, R Koelle, D Gross, R Huebener, RP Ludwig, F Dantsker, E Kleiner, R Clarke, J AF Gerber, R Koelle, D Gross, R Huebener, RP Ludwig, F Dantsker, E Kleiner, R Clarke, J TI Low temperature scanning electron microscopy study of YBa2Cu3O7-delta multilayer dc SQUID magnetometers SO APPLIED PHYSICS LETTERS LA English DT Article ID FLUX TRANSFORMER AB Low temperature scanning electron microscopy (LTSEM) has been used to analyze the superconducting properties of integrated magnetometers involving a de superconducting quantum interference device. The study yielded spatially resolved information on the critical temperature T-c and critical current density J(c) in the upper and lower superconducting layers of the YBa2Cu3O7-delta/SrTiO3/YBa2Cu3O7-delta stricture. The T-c of the lower film was depressed by several kelvin, and the J(c) of the upper film was lower where it crossed the edge of a lower YBa2Cu3O7-delta film covered with SrTiO3. A gradient in T-c was observed in the lower film near the edge of a via, arising presumably from oxygen diffusion during fabrication. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720. RP Gerber, R (reprint author), UNIV TUBINGEN,INST PHYS,LEHRSTUHL EXPTL PHYS 2,MORGENSTELLE 14,D-72076 TUBINGEN,GERMANY. RI Koelle, Dieter/E-5111-2011; Gross, Rudolf/A-6227-2012 OI Gross, Rudolf/0000-0003-4524-7552 NR 13 TC 14 Z9 14 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 11 PY 1996 VL 68 IS 11 BP 1555 EP 1557 DI 10.1063/1.115697 PG 3 WC Physics, Applied SC Physics GA TZ291 UT WOS:A1996TZ29100039 ER PT J AU Seshadri, S Rotem, D AF Seshadri, S Rotem, D TI The two headed disk: Stochastic dominance of the greedy policy SO INFORMATION PROCESSING LETTERS LA English DT Article DE two headed disk; seek time; stochastic optimality; analysis of algorithms AB In his paper ''Should the two-headed disk be greedy? - Yes, it should'' Hofri defined a ''greedy policy'' as follows. Assuming that the range of disk addresses is [0,1], a request at location x is served by the closest arm while the other arm jockeys to a new position, z, where z = (1/3)x or z = 2/3 + x/3 depending on whether x is larger or smaller than 1/2. Hofri proved that this policy minimizes the expected seek distance for uniform request probabilities and conjectured that it stochastically dominates every other policy. Stochastic dominance is of practical importance in this context as it guarantees that a policy that optimizes expected seek distance also guarantees optimal seek time. The main result of this paper is a proof of Hofri's conjecture. The paper contains two proofs, the first establishes the conjecture, and the second shows that if the seek distance is stochastically minimized under a repositioning policy, then the policy must be Hofri's greedy policy and the request distribution must be uniform. C1 LAWRENCE BERKELEY LAB,INFORMAT & COMP SCI DIV,BERKELEY,CA 94720. RP Seshadri, S (reprint author), NYU,LEONARD N STERN SCH BUSINESS,DEPT STAT & OPERAT RES,NEW YORK,NY 10012, USA. RI Seshadri, Sridhar/D-6034-2012 NR 6 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0020-0190 J9 INFORM PROCESS LETT JI Inf. Process. Lett. PD MAR 11 PY 1996 VL 57 IS 5 BP 273 EP 277 DI 10.1016/0020-0190(95)00210-3 PG 5 WC Computer Science, Information Systems SC Computer Science GA UF590 UT WOS:A1996UF59000008 ER PT J AU Jacobsen, ER Segel, RE Bent, RD Brown, JD Hardie, G Schneider, R Sun, C Berg, GPA Blomgren, J Chen, FJ Heimberg, P Holmolka, J Kurepin, A Nann, H Pancella, P Rehm, KE Rinckel, T Saber, M Yu, Z Zhuravlev, A AF Jacobsen, ER Segel, RE Bent, RD Brown, JD Hardie, G Schneider, R Sun, C Berg, GPA Blomgren, J Chen, FJ Heimberg, P Holmolka, J Kurepin, A Nann, H Pancella, P Rehm, KE Rinckel, T Saber, M Yu, Z Zhuravlev, A TI Measurement of high momentum transfer reactions by recoil detection at a cooler ring SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB A system for the measurement of medium-energy, high-momentum transfer reactions via detection of the heavier ion products has been developed. The system consists of a parallel grid avalanche counter, a proportional counter, and a large-area microstrip silicon detector array, all attached to a large-gap dipole magnet that bends the primary beam through 6 degrees and sweeps the recoil ions into the detection system. The detector stack measures the energy, time-of-flight, nuclear charge, mass, and angle of recoil-ion emission products. Ray tracing gives the emission angle of the recoil ions at the target. The system was installed at the Indiana Cooler Ring and its advantages and use in a storage ring environment are discussed. Preliminary results of differential cross section measurements for the reaction C-12(p, pi(+))C-13 at T-p = 166 and 294 MeV are presented. C1 INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47408. INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47408. PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08540. NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60201. WESTERN MICHIGAN UNIV,DEPT PHYS,KALAMAZOO,MI 49008. TECH UNIV MUNICH,DEPT PHYS,W-8000 MUNICH,GERMANY. ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439. RUSSIAN ACAD SCI,INST NUCL RES,MOSCOW,RUSSIA. RI Kurepin, Alexey/H-4852-2013 OI Kurepin, Alexey/0000-0002-1851-4136 NR 17 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 11 PY 1996 VL 371 IS 3 BP 439 EP 448 DI 10.1016/0168-9002(95)00993-0 PG 10 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UG782 UT WOS:A1996UG78200015 ER PT J AU Chikanian, A Kumar, BS Smirnov, N OBrien, E AF Chikanian, A Kumar, BS Smirnov, N OBrien, E TI A momentum reconstruction algorithm for the PHENIX spectrometer at Brookhaven SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB We have developed a non-linear grid interpolation technique to determine the momenta of particles traversing an axially symmetric focusing magnetic field. We describe the technique, and quantify its performance in the context of the PHENIX spectrometer. C1 YALE UNIV,AW WRIGHT NUCL STRUCT LAB,NEW HAVEN,CT 06520. BROOKHAVEN NATL LAB,DEPT PHYS,LONG ISL CITY,NY 11398. NR 7 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD MAR 11 PY 1996 VL 371 IS 3 BP 480 EP 488 DI 10.1016/0168-9002(95)01000-9 PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA UG782 UT WOS:A1996UG78200020 ER PT J AU Heiselberg, H Wang, XN AF Heiselberg, H Wang, XN TI Thermal equilibration in an expanding parton plasma SO NUCLEAR PHYSICS B LA English DT Article ID HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; QUARK-GLUON; HOT QCD; PARTICLE-PRODUCTION; FINITE-TEMPERATURE; DAMPING RATE; MODEL; SCATTERING; TRANSPORT AB Thermalization in an expanding parton plasma is studied within the framework of the Boltzmann equation in the absence of any mean fields. In particular, we study the time dependence of the relaxation time to the lowest order in finite temperature QCD and how such time dependence affects the thermalization of an expanding parton plasma, Because of Debye screening and Landau damping at finite temperature, the relaxation time (or transport rates) is free of infrared divergencies in both longitudinal and transverse interactions, The resultant relaxation time decreases with time in an expanding plasma like 1/tau(beta), with beta < 1. We prove in this case that thermal equilibrium will eventually be established given a long life-time of the system. However, a fixed momentum cut-off in the calculation of the relaxation time gives rise to a much stronger time dependence which will slow down thermal equilibrium, It is also demonstrated that the ''memory effect'' of the initial condition affects the approach thermal equilibrium and the final entropy production. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. RP Heiselberg, H (reprint author), NORDITA,BLEGDAMSVEJ 17,DK-2100 COPENHAGEN 0,DENMARK. OI Wang, Xin-Nian/0000-0002-9734-9967; Heiselberg, Henning/0000-0003-2229-2000 NR 46 TC 24 Z9 24 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 J9 NUCL PHYS B JI Nucl. Phys. B PD MAR 11 PY 1996 VL 462 IS 2-3 BP 389 EP 411 DI 10.1016/0550-3213(95)00680-X PG 23 WC Physics, Particles & Fields SC Physics GA UD042 UT WOS:A1996UD04200006 ER PT J AU Richardson, JW Price, DL Saboungi, ML AF Richardson, JW Price, DL Saboungi, ML TI Crystal symmetry lowering at an order-disorder transition SO PHYSICAL REVIEW LETTERS LA English DT Article ID PHASE-TRANSITION; ALLOY; NASN AB Neutron diffraction measurements in the high-temperature disordered phase of NaSn show that the transition to this phase from the ordered low-temperature phase is associated with a lowering of crystal symmetry which is unique among disordering transitions. The structure refinement reveals intimate correlations between the Na+ cation positions and Sn-4(4-) polyanion orientations in the disordered phase, and indicates that the cation migration takes place along convoluted channels in the crystal. RP ARGONNE NATL LAB, 9700 S CASS AVE, ARGONNE, IL 60439 USA. RI Price, David Long/A-8468-2013; Saboungi, Marie-Louise/C-5920-2013 OI Saboungi, Marie-Louise/0000-0002-0607-4815 NR 20 TC 7 Z9 7 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 EI 1079-7114 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 11 PY 1996 VL 76 IS 11 BP 1852 EP 1855 DI 10.1103/PhysRevLett.76.1852 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ282 UT WOS:A1996TZ28200023 ER PT J AU Weir, ST Mitchell, AC Nellis, WJ AF Weir, ST Mitchell, AC Nellis, WJ TI Metallization of fluid molecular hydrogen at 140 GPa (1.4 mbar) SO PHYSICAL REVIEW LETTERS LA English DT Article ID SOLID HYDROGEN; HIGH-DENSITY; ELECTRICAL-CONDUCTIVITY; MEGABAR PRESSURES; SHOCK COMPRESSION; EQUATION; STATE; DEUTERIUM; TRANSITION; SYSTEM AB Electrical resistivities were measured for liquid H-2 and D-2 shock compressed to pressures of 93-180 GPa (0.93-1.8 Mbar). Calculated densities and temperatures were in the range 0.28-0.36 mol/cm(3) and 2200-4400 K. Resistivity decreases almost 4 orders of magnitude from 93 to 140 GPa and is essentially constant at a value typical of a liquid metal from 140 to 180 GPa. The data are interpreted in terms of a continuous transition from a semiconducting to metallic diatomic fluid at 140 GPa and 3000 K. RP Weir, ST (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. RI Weir, Samuel/H-5046-2012 NR 37 TC 520 Z9 531 U1 3 U2 29 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 11 PY 1996 VL 76 IS 11 BP 1860 EP 1863 DI 10.1103/PhysRevLett.76.1860 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ282 UT WOS:A1996TZ28200025 ER PT J AU Campbell, IH Hagler, TW Smith, DL Ferraris, JP AF Campbell, IH Hagler, TW Smith, DL Ferraris, JP TI Direct measurement of conjugated polymer electronic excitation energies using metal/polymer/metal structures SO PHYSICAL REVIEW LETTERS LA English DT Article ID DIODES AB We report electroabsorption measurements of built-in electric fields and internal photoemission measurements of Schottky barriers to determine the charge transfer and single-particle energy gaps of the conjugated polymer poly[2-methoxy, 5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV). For MEH-PPV, with an exciton absorption peak of 2.25 eV, or results yield a single-particle energy gap of 2.45 eV and a charge transfer energy gap of at least 2.35 eV. Therefore the exciton binding energy is 0.2 eV and the bipolaron binding energy is less than 0.1 eV. C1 UNIV TEXAS,RICHARDSON,TX 75083. RP Campbell, IH (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 16 TC 370 Z9 372 U1 0 U2 54 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 11 PY 1996 VL 76 IS 11 BP 1900 EP 1903 DI 10.1103/PhysRevLett.76.1900 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ282 UT WOS:A1996TZ28200035 ER PT J AU Suh, BJ Borsa, F Sok, J Torgeson, DR Corti, M Rigamonti, A Xiong, Q AF Suh, BJ Borsa, F Sok, J Torgeson, DR Corti, M Rigamonti, A Xiong, Q TI Thermal depinning of flux lines in HgBa2CuO4+delta from Hg-199 spin-lattice relaxation SO PHYSICAL REVIEW LETTERS LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC-FIELD DEPENDENCE; Y-89 NMR; VORTEX DYNAMICS; ANISOTROPY; YBA2CU3O7; MOTION; SUSCEPTIBILITY; FLUCTUATIONS; PENETRATION AB Hg-199 NMR spin-lattice relaxation rates in an aligned powder sample of the anisotropic high-T-c superconductor HgBa2CuO4+delta (T-c = 96 K) show anisotropy in the temperature interval 10-50 K, with an extra contribution present for the external magnetic field parallel to the c axis. The extra contribution shifts with magnetic field in a way related to the irreversibility temperature T-irr indicating that the thermal motion of flux lines (FL's) is the cause of the extra relaxation. A simple model is presented to analyze the relaxation data and to extract values for the correlation time tau(c) and the effective activation;energy U of the FL motion. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. UNIV PAVIA,DIPARTIMENTO FIS A VOLTA,INTERUNIV FIS METERIA,I-27100 PAVIA,ITALY. UNIV ARKANSAS,DEPT PHYS,HIGH DENS ELECT CTR,FAYETTEVILLE,AR 72701. RP Suh, BJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 30 TC 23 Z9 23 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 11 PY 1996 VL 76 IS 11 BP 1928 EP 1931 DI 10.1103/PhysRevLett.76.1928 PG 4 WC Physics, Multidisciplinary SC Physics GA TZ282 UT WOS:A1996TZ28200042 ER PT J AU Szapudi, I Szalay, AS AF Szapudi, I Szalay, AS TI Effects of sampling on measuring galaxy count probabilities SO ASTROPHYSICAL JOURNAL LA English DT Article DE galaxies, statistics; methods, statistical ID CLUSTER CORRELATIONS; STATISTICS; UNIVERSE; MATTER AB We investigate in detail the effects of sampling on our ability to accurately reconstruct the distribution of galaxies from galaxy surveys. We use a simple probability theory approach, Bayesian classifier theory and Bayesian transition probabilities. We find the best Bayesian estimator for the case of low sampling rates and show that even in the optimal case certain higher order characteristics of the distribution are irretrievably washed out by sparse sampling: we illustrate this by a simple model for cluster selection. We show that, even choosing an optimal threshold, there are nonzero numbers for both misidentified clusters and true clusters that are missed. The introduction of sampling has an effect on the distribution function that is similar to convolution. Deconvolution is possible and given in the paper, although it might become unstable as sampling rates become low. These findings have important consequences on planning and strategies of future galaxy surveys. C1 JOHNS HOPKINS UNIV, DEPT PHYS & ASTRON, BALTIMORE, MD 21218 USA. EOTVOS LORAND UNIV, DEPT PHYS, BUDAPEST, HUNGARY. RP Szapudi, I (reprint author), FERMILAB ASTROPHYS CTR, MS-209, POB 500, BATAVIA, IL 60510 USA. NR 19 TC 11 Z9 11 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD MAR 10 PY 1996 VL 459 IS 2 BP 504 EP 508 DI 10.1086/176913 PN 1 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX195 UT WOS:A1996TX19500010 ER PT J AU Ryutova, MP Kaisig, M Tajima, T AF Ryutova, MP Kaisig, M Tajima, T TI The evolution of magnetic structures due to ''magnetosonic streaming'' SO ASTROPHYSICAL JOURNAL LA English DT Article DE MHD; sun, magnetic fields ID ALFVEN WAVES; SOUND-WAVES; PROPAGATION; PHOTOSPHERE; FIELDS; FLUX AB The Faraday effect in gasdynamics called acoustic streaming and its accompanying nonlinear phenomena have analogies in plasma magnetohydrodynamics. A natural place where these effects may occur is the solar atmosphere with its strongly inhomogeneous magnetic fields concentrated in random magnetic flux tubes. Unlike acoustic streaming in the usual gasdynamics, nonlinear phenomena consisting in the generation of plasma flows by an oscillating magnetic flux tube, ''magnetosonic streaming'' (Ryutova 1986), is accompanied by a current drive and results in a specific evolution of magnetic structures: depending on the physical parameters of the medium a single magnetic flux tube may be either split into thinner flux tubes or dissolved diffusively into the ambient plasma. The effect of the ''magnetosonic streaming,'' on one hand, is an obvious candidate for the generation of mass flows at magnetic flux tubes sites, and on the other hand, it plays an essential role in the evolution of magnetic structures and ultimately may determine their lifetime. The theory of magnetosonic streaming is general and can be applied to other astrophysical objects that maintain oscillatory motions and contain structured magnetic fields or magnetic domains. We review analytical results and describe the origin of the magnetosonic streaming in magnetic flux tubes due to their interaction with acoustic waves. We study numerically the regime of the ''magnetosonic streaming'' corresponding to splitting of a magnetic flux tube. Our computer simulation supports and extends the analytical result. C1 UNIV TEXAS, DEPT PHYS, AUSTIN, TX 78712 USA. UNIV TEXAS, INST FUS STUDIES, AUSTIN, TX 78712 USA. RP Ryutova, MP (reprint author), LAWRENCE LIVERMORE NATL LAB, INST GEOPHYS & PLANETARY PHYS, L-413, LIVERMORE, CA 94550 USA. NR 34 TC 8 Z9 8 U1 0 U2 0 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 MAR 10 PY 1996 VL 459 IS 2 BP 744 EP 759 DI 10.1086/176939 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA TX195 UT WOS:A1996TX19500036 ER PT J AU Garcia, HE Ray, A AF Garcia, HE Ray, A TI State-space supervisory control of reconfigurable discrete event systems SO INTERNATIONAL JOURNAL OF CONTROL LA English DT Article AB The discrete event theory of supervisory and state feedback control offers many advatages for implementing supervisory systems. Algorithmic concepts have been introduced to ensure that the supervising algorithms are correct and meet the specifications. In the current methodology, it is, in general, assumed that the supervisory specifications are invariant during the operation of the system or, at least, until a given supervisory task is completed. However, there are many practical applications where the supervising specifications need to be updated in real time. For example, when dealing with complex processes, the tasks of supervisory systems analysis and synthesis can be facilitated by partitioning the controlled Discrete-Event System (DES) into several subprocesses. This partitioning is based on operational or physical considerations and a unique supervisor is assigned to control each subprocess at a given instant of time. When a decision maker at a higher level of hierarchy decides to change the supervising algorithm, switching to a new supervisor takes place. For this adaptive implementation, the decision-maker or coordinator first decides the set of acting supervisors based on the requested supervisory tasks or current system performance requirements and then exercises control over the enabled supervisors in real time. Specifically, in a Reconfigurable Discrete Event System (RDES) architecture, a bank of supervisors is defined to accommodate each identified operational condition or different supervisory specifications. This adaptive supervisory control system can change its supervisory configuration to accept coordinator commands or to adjust for changes in the controlled process. This paper addresses reconfiguration at the supervisory level of hybrid systems along with the underlying architecture of RDES. In particular, the paper reviews the supervisory control theory in the state-based framework and extends it to the paradigm of RDES, considering process control applications. The paper addresses theoretical issues with a limited number of practical examples. This control approach is particularly suitable for hierarchical hybrid implementations with the capability of reconfiguration at both the control and supervisory levels. C1 PENN STATE UNIV,DEPT MECH ENGN,UNIVERSITY PK,PA 16802. RP Garcia, HE (reprint author), ARGONNE NATL LAB,POB 2528,IDAHO FALLS,ID 83403, USA. NR 33 TC 12 Z9 12 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0020-7179 J9 INT J CONTROL JI Int. J. Control PD MAR 10 PY 1996 VL 63 IS 4 BP 767 EP 797 DI 10.1080/00207179608921868 PG 31 WC Automation & Control Systems SC Automation & Control Systems GA UD308 UT WOS:A1996UD30800007 ER PT J AU Schmeling, H Bussod, GY AF Schmeling, H Bussod, GY TI Variable viscosity convection and partial melting in the continental asthenosphere SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID LOW-VELOCITY ZONE; GRAIN-SIZE; MANTLE; PERIDOTITE; TEMPERATURE; DEFORMATION; LITHOSPHERE; GENERATION; COMPACTION; THICKNESS AB Convection beneath continents may be associated with the generation of partially molten zones at depth. Experimentally determined non-Newtonian, temperature-and pressure-dependent creep laws for olivine were used to model upper mantle convection in the presence and absence of a melt phase. In our models, convection is chaotic and exhibits a strong time dependence. Using model ''dry'' and ''water-undersaturated'' solidus relations, partially molten regions develop at asthenospheric depths forming low-viscosity regions. The existence of these regions is linked to convection and consequently varies in space and time with an episodicity of 5 to 10 m.y., in good agreement with observations based on seismic tomography and the episodicity and volumetric abundance of surface volcanics. For an average continental heat flux of about 53.3 mW/m(2), maximum melt fractions range between 0 and 2% (dry solidus) and 2 and 4% (water-undersaturated solidus). On the basis of experimental deformation studies, we employed an empirical relationship between stress and grain size to assess the grain size variations possible in the upper mantle. The grain sizes obtained (millimeters to centimeters) are in good agreement with grain sizes observed in natural examples. The smallest grain sizes occur along narrow zones of high stress within the deepest part of the lithosphere. The largest grain sizes are found in the overlying lithosphere and in partially molten asthenospheric regions. As our models scale well to natural observations, these results appear to preclude diffusion creep (n = 1) as a viable upper mantle steady state deformation mechanism. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. UNIV BAYREUTH, BAYER GEOINST, W-8580 BAYREUTH, GERMANY. NR 40 TC 27 Z9 27 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD MAR 10 PY 1996 VL 101 IS B3 BP 5411 EP 5423 DI 10.1029/95JB01154 PG 13 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA UA372 UT WOS:A1996UA37200002 ER PT J AU Vogel, TA Aines, R AF Vogel, TA Aines, R TI Melt inclusions from chemically zoned ash flow sheets from the Southwest Nevada Volcanic Field SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID VALLEY CALDERA COMPLEX; LAYERED MAGMA BODY; CARBON-DIOXIDE; LIQUID FRACTIONATION; SILICATE-GLASSES; TIMBER MOUNTAIN; NEW-MEXICO; WATER; EVOLUTION; CHAMBERS AB The purpose of this paper is to determine whether melt inclusions from three well studied, compositionally zoned ash flow sheets from the Southwest Nevada Volcanic Field can be used to determine the evolution of the parent magma bodies. All samples are from the quenched, glassy pumice fragments that occur in the upper and lower portions of the Topopah Spring Tuff (68.7-78.7% SiO2), the Rainier Mesa Tuff (55.0-76.3% SiO2), and the Ammonia Tanks Tuff (57.5-76.3% SiO2) (all SiO2 values anhydrous). Most of the melt inclusions in this study are in feldspar; a few are in quartz. There are large variations of volatile concentrations in melt inclusions within an individual phenocryst and large variations in melt inclusions in different phenocrysts within a pumice fragment. This finding demonstrates that the volatiles did not reequilibrate after the formation of the ash flow sheet. The volatile contents of most of these melt inclusions represent decompression and loss of some volatiles and therefore do not represent conditions at the time of entrapment. The presence of CO2 in many inclusions demonstrates that the magma evolved a gas phase in its preeruption evolution. The nonvolatile chemical variations of the melt inclusions from the Rainier Mesa and Ammonia Tanks Tuffs are similar. Melt inclusions from the lower-silica pumice fragments show a wide range of chemical variation and monitor the liquid as it evolved. In both tuffs some melt inclusions are significantly more silica-rich than the matrix glass, and indicate mixing with a more evolved magma. Most melt inclusions from the high-silica pumice fragments from each of these tuffs show little chemical variation and are similar to the matrix glass. The fact that no lower-silica melt inclusions occur in the high-silica pumice fragments supports the model that the high-silica magma did not evolve from the low-silica magma. The maximum H2O concentrations of inclusions in each pumice fragment from the Rainier Mesa and Ammonia Tanks Tuffs show a general positive correlation with SiO2 concentrations of the pumice fragment. No such relationship is observed with the Topopah Spring Tuff. C1 LAWRENCE LIVERMORE NATL LAB, DEPT EARTH SCI, LIVERMORE, CA 94550 USA. RP MICHIGAN STATE UNIV, DEPT GEOL SCI, E LANSING, MI 48824 USA. RI Aines, Roger/A-2013-2013 NR 59 TC 18 Z9 18 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD MAR 10 PY 1996 VL 101 IS B3 BP 5591 EP 5610 DI 10.1029/95JB03252 PG 20 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA UA372 UT WOS:A1996UA37200017 ER PT J AU Bouchon, M Schultz, CA Toksoz, MN AF Bouchon, M Schultz, CA Toksoz, MN TI Effect of three-dimensional topography on seismic motion SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID WAVE-NUMBER REPRESENTATION; GROUND MOTION; SURFACE IRREGULARITIES; SH-WAVES; RAYLEIGH-WAVES; ELASTIC-WAVES; NORESS ARRAY; SV-WAVE; P-WAVE; DIFFRACTION AB We present a semianalytical, seminumerical method to calculate the diffraction of elastic waves by an irregular topography of arbitrary shape. The method is a straightforward extension to three dimensions of the approach originally developed to study the diffraction of SH waves [Bouchon, 1985] and P-SV waves [Gaffet and Bouchon, 1989] by two-dimensional topographies. It relies on a boundary integral equation scheme formulated in the frequency domain where the Green functions are evaluated by the discrete wavenumber method. The principle of the method is simple. The diffracted wave field is represented as the integral over the topographic surface of an unknown source density function times the medium Green functions. The Green functions are expressed as integrals over the horizontal wavenumbers. The introduction of a spatial periodicity of the topography combined with the discretization of the surface at equal intervals results in a discretization of the wavenumber integrals and in a periodicity in the horizontal wavenumber space. As a result, the Green functions are expressed as finite sums of analytical terms. The writing of the boundary conditions of free stress at the surface yields a linear system of equations where the unknowns are the source density functions representing the diffracted wave field. Finally, this system is solved iteratively using the conjugate gradient approach. We use this method to investigate the effect of a hill on the ground motion produced during an earthquake. The hill considered is 120 m high and has an elliptical base and ratios of height-to-half-width of 0.2 and 0.4 along its major and minor axes. The results obtained show that amplification occurs at and near the top of the hill over a broad range of frequencies. For incident shear waves polarized along the short dimension of the hill the amplification at the top reaches 100% around 10 Hz and stays above 50% for frequencies between 1.5 Hz and 20 Hz. For incident shear waves polarized along the direction of elongation bf the topography, the maximum amplification occurs between 2 Hz and 5 Hz with values ranging from 50% to 75%. The results also show that the geometry of the topography exerts a very strong directivity on the wave field diffracted away from the hill and that at some distance from the hill this diffracted wave field consists mostly of Rayleigh waves. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. MIT, EARTH RESOURCES LAB, CAMBRIDGE, MA 02139 USA. RP UNIV GRENOBLE 1, LAB GEOPHYS INTERNE & TECTONOPHYS, BP 53X, F-38041 GRENOBLE, FRANCE. NR 64 TC 87 Z9 93 U1 0 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD MAR 10 PY 1996 VL 101 IS B3 BP 5835 EP 5846 DI 10.1029/95JB02629 PG 12 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA UA372 UT WOS:A1996UA37200034 ER PT J AU Smith, RP Jackson, SM Hackett, WR AF Smith, RP Jackson, SM Hackett, WR TI Paleoseismology and seismic hazards evaluations in extensional volcanic terrains SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Review ID SNAKE RIVER PLAIN; WESTERN UNITED-STATES; SURFACE DEFORMATION; DIKE INTRUSION; LAVA FLOWS; RIFT ZONES; COSMOGENIC HE-3; RUPTURE PROCESS; SEPTEMBER 1977; NORTH ICELAND AB Extensional structures in volcanic terrains are the surface expression of shallow dike intrusion and can be misinterpreted as structures associated with major tectonic faults. Dike-induced structures can be distinguished from their tectonic counterparts by their association with cogenetic volcanic rocks and by several geometric relationships. Tensile fissures with little or no vertical displacement, fissure swarms, flexural monoclines, and normal faults are commonly symmetrically distributed about a central eruptive fissure, sometimes forming a graben above shallow dikes. The structures typically occur within broad zones, not narrow belts near a main fault zone, reflecting their origin by repeated dike injection. Colluvial wedges containing records of single large earthquakes generally do not form; instead, fault scarps with several-meter vertical displacements in volcanic bedrock may reflect the cumulative effects of many decimeter-scale displacement events from several dike injection episodes. The mechanism of dike intrusion and the nature of cointrusive seismicity have important implications for determination of the maximum magnitude and recurrence of earthquakes in extensional volcanic terrains. Observational seismicity from volcanic rift zones worldwide suggests the maximum magnitudes of dike-induced earthquakes are 3.8 +/- 0.8. Earthquakes are generally small to moderate because downdip extents of faults and fissures are controlled by the depth to the top of the associated dike (usually <5 km), permitting only small rupture areas. Also, rupture and displacement on faults and fissures migrate incrementally at about the velocity of propagating dikes (0.5 m/s) as dike dilation stresses the zone above and ahead of the dike. Earthquake recurrence is tied to recurrence of volcanic cycles based on the geochronology of the associated volcanic materials. Based on these concepts, innovative approaches have led to estimates of the maximum magnitude and recurrence for magma-induced seismicity in eastern Snake River Plain (ESRP) volcanic rift zones. The most conservative approach uses surface length, fault width (downdip extent), and rupture areas of normal faults and fissures produced by dike injection to estimate a maximum M5.5 earthquake for an episode of rift zone volcanism. Chronology of volcanic rocks suggests annual probabilities of 10(-4) to 10(-5) for volcanic rift zones near Idaho National Engineering Laboratory facilities. Probabilistic assessments show that ground motion hazard due to volcanic rift zone seismicity is lower than the hazard from other earthquake sources. This is because of the relatively low magnitudes and long recurrence intervals of cointrusive earthquakes in volcanic rift zones. C1 WRH ASSOCIATES, SALT LAKE CITY, UT 84117 USA. RP LOCKHEED IDAHO TECHNOL CO, IDAHO NATL ENGN LAB, POB 1625, MAIL STOP 2107, IDAHO FALLS, ID 83415 USA. NR 102 TC 24 Z9 24 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 2169-9313 EI 2169-9356 J9 J GEOPHYS RES-SOL EA JI J. Geophys. Res.-Solid Earth PD MAR 10 PY 1996 VL 101 IS B3 BP 6277 EP 6292 DI 10.1029/95JB01393 PG 16 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA UA372 UT WOS:A1996UA37200061 ER PT J AU Weare, CB Yarmoff, JA AF Weare, CB Yarmoff, JA TI Resonant neutralization of Li-7(+) scattered from alkali/Al(100) as a probe of the local electrostatic potential SO SURFACE SCIENCE LA English DT Article DE adatoms; alkali metals; aluminum; ion-solid interactions; low energy ion scattering (LEIS); low index single crystal surfaces; metallic surfaces; surface electronic phenomena ID CHARGE-EXCHANGE; ION-SCATTERING; ALKALI ADSORBATES; ENERGY SHIFTS; SURFACES; AL(111); CU(110); LI+; NA AB Time-of-flight detection is used to measure the neutralization probabilities for 1.2 and 2.0 keV Li-7(+) ions scattered from alkali-adsorbate-covered Al(100) surfaces. At low coverages, the neutral fractions for single scattering from adsorbate and substrate sites differ significantly while, at larger coverages, they are nearly equal. This change denotes a transition in the surface local electrostatic potential (LEP) from being spatially inhomogeneous to becoming homogeneous. The measured neutral fractions are compared to a quantum mechanical multi-state model of resonant charge transfer that includes the inhomogeneous adsorbate-induced part of the LEP. When the adsorbate-induced potential is modeled as the sum of isolated dipoles, good agreement between theory and experiment is obtained for single scattering from substrate atoms. C1 UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521. UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720. NR 27 TC 80 Z9 80 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD MAR 10 PY 1996 VL 348 IS 3 BP 359 EP 369 DI 10.1016/0039-6028(95)01013-0 PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA UA262 UT WOS:A1996UA26200016 ER PT J AU Bernholdt, DE Harrison, RJ AF Bernholdt, DE Harrison, RJ TI Large-scale correlated electronic structure calculations: The RI-MP2 method on parallel computers SO CHEMICAL PHYSICS LETTERS LA English DT Article ID 4-INDEX TRANSFORMATION; BASIS-SETS; VECTOR; APPROXIMATIONS; ARCHITECTURES AB The approximate 'resolution of the identity' second-order many-body perturbation theory method (RI-MP2) recently introduced by Feyereisen, Fitzgerald and Komornicki utilizes a combination of two- and three-center integrals to approximate the usual four-center two-electron repulsion integrals, Like the exact MP2, the overall cost of the RI-MP2 method scales with the fifth power of the number of basis functions, however the balance of the work shifts in such a way as to make the RI-MP2 method particularly well suited for implementation on massively parallel computers. We describe such an implementation and examine its parallel performance for several chemical systems. We are able to accurately reproduce the exact MP2 binding energy of K+ to 12-crown-4 ether in roughly 5% of the time. C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA. NR 34 TC 135 Z9 135 U1 0 U2 7 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 MAR 8 PY 1996 VL 250 IS 5-6 BP 477 EP 484 DI 10.1016/0009-2614(96)00054-1 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA UB322 UT WOS:A1996UB32200008 ER PT J AU Merdink, JL Stenner, RD Stevens, DK Parker, JC Bull, RJ AF Merdink, JL Stenner, RD Stevens, DK Parker, JC Bull, RJ TI Contribution of enterohepatic circulation on the disposition of chloral hydrate metabolites SO FASEB JOURNAL LA English DT Meeting Abstract C1 WASHINGTON STATE UNIV, GRAD PROGRAM PHARMACOL TOXICOL, PULLMAN, WA 99164 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. US EPA, NCEA, WASHINGTON, DC 20460 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 1003 EP 1003 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28401005 ER PT J AU Stauber, AJ Bull, ME Bull, RJ AF Stauber, AJ Bull, ME Bull, RJ TI Modes of action of dichloroacetate (DCA) and trichloroacetate (TCA) induced hepatocarcinogenesis differ SO FASEB JOURNAL LA English DT Meeting Abstract C1 WASHINGTON STATE UNIV, PHARMACOL TOXICOL GRAD PROGRAM, PULLMAN, WA 99164 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 1050 EP 1050 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28401052 ER PT J AU Kim, JH Mynatt, R Moore, JW Woychik, R Moustaid, N Zemel, M AF Kim, JH Mynatt, R Moore, JW Woychik, R Moustaid, N Zemel, M TI The effects of calcium channel blockade on agouti-induced obesity SO FASEB JOURNAL LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV TENNESSEE,KNOXVILLE,TN 37996. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 1077 EP 1077 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28401077 ER PT J AU Yasumura, S Stamatelatos, IE Ma, R Boozer, CN Pierson, RN AF Yasumura, S Stamatelatos, IE Ma, R Boozer, CN Pierson, RN TI Body composition in rats: In vivo neutron activation vs carcass analysis SO FASEB JOURNAL LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. ST LUKES HOSP,OBES RES CTR,NEW YORK,NY 10025. ST LUKES HOSP,BODY COMPOSIT UNI,NEW YORK,NY 10025. INST NUCL TECH DEMOKRITOS,GR-15310 ATHENS,GREECE. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 1202 EP 1202 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28401202 ER PT J AU Razor, J Sulzer, B Bold, J Paar, J Gorman, W Farris, JA Perelson, A Posner, R AF Razor, J Sulzer, B Bold, J Paar, J Gorman, W Farris, JA Perelson, A Posner, R TI Aggregation of IgE-receptor complexes by multivalent antigens: Quantifying crosslinking at the cell surface. SO FASEB JOURNAL LA English DT Meeting Abstract C1 NO ARIZONA UNIV,DEPT CHEM,FLAGSTAFF,AZ 86011. LOS ALAMOS NATL LAB,THEORET BIOL GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 1492 EP 1492 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28401490 ER PT J AU Onaivi, ES Chakrabarti, A McDuffie, I Chittenden, LR Stubbs, L Chaudhuri, G AF Onaivi, ES Chakrabarti, A McDuffie, I Chittenden, LR Stubbs, L Chaudhuri, G TI Genes encoding marijuana receptors and their chromosomal localization SO FASEB JOURNAL LA English DT Meeting Abstract C1 MEHARRY MED COLL,NASHVILLE,TN 37208. ELIZABETH CITY STATE UNIV,ELIZABETH CITY,NC 27909. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 1730 EP 1730 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28401728 ER PT J AU Sinha, R Brown, E Rothman, N Swanson, C Knize, M Felton, J Levander, O AF Sinha, R Brown, E Rothman, N Swanson, C Knize, M Felton, J Levander, O TI Exposure assessment of heterocyclic amines (HCAs) in epidemiologic studies. SO FASEB JOURNAL LA English DT Meeting Abstract C1 NCI,NIH,BETHESDA,MD 20892. USDA,BHNRC,NRFL,BELTSVILLE,MD 20705. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 1 Z9 1 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 3172 EP 3172 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28403172 ER PT J AU Pierson, RN Wang, J Ma, RM Nelson, ME Heymsfield, SB Kotler, DP Thornton, JC Kehayias, JJ AF Pierson, RN Wang, J Ma, RM Nelson, ME Heymsfield, SB Kotler, DP Thornton, JC Kehayias, JJ TI Measuring body fat from carbon vs dual X-ray and multi-compartment models. SO FASEB JOURNAL LA English DT Meeting Abstract C1 TUFTS UNIV,MEDFORD,MA 02155. BROOKHAVEN NATL LAB,UPTON,NY 11973. COLUMBIA UNIV,ST LUKES ROOSEVELT HOSP,NEW YORK,NY 10025. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 4244 EP 4244 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28404245 ER PT J AU Griffin, GD Miller, EJ Gailey, PC AF Griffin, GD Miller, EJ Gailey, PC TI Real-time monitoring of melatonin-induced gene expression in breast tumor cells transfected with a luc reporter gene. SO FASEB JOURNAL LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 1 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 4381 EP 4381 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28404380 ER PT J AU Cook, RJ Champion, KM Giometti, CS AF Cook, RJ Champion, KM Giometti, CS TI Histidine and formate oxidation by homozygous NEUT2 mice. SO FASEB JOURNAL LA English DT Meeting Abstract C1 VANDERBILT UNIV,SCH MED,DEPT BIOCHEM,NASHVILLE,TN 37323. ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU FEDERATION AMER SOC EXP BIOL PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998 SN 0892-6638 J9 FASEB J JI Faseb J. PD MAR 8 PY 1996 VL 10 IS 3 BP 4627 EP 4627 PG 1 WC Biochemistry & Molecular Biology; Biology; Cell Biology SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other Topics; Cell Biology GA TZ284 UT WOS:A1996TZ28404629 ER PT J AU Knickelbein, MB AF Knickelbein, MB TI The infrared photodissociation spectra of Fe-n(CH3OH)(m) complexes and their deuterated analogs near 10 mu SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID COLLISION-INDUCED DISSOCIATION; TRANSITION-METAL CLUSTERS; IRON CLUSTERS; IONIZATION-POTENTIALS; SPECTROSCOPY; METHANOL; PHOTOIONIZATION; DECOMPOSITION; ENERGIES; BINDING AB The infrared photodissociation spectra of Fe-n(CH3OH)(m), Fe-n(CH3OD)(m), Fe-n(CD3OH)(m), and Fe-n(CD3OD)(m) (n = 5-15; m = 1,2) have been recorded from 920-1090 cm(-1). Analysis of the spectral features indicates that in all cases, molecularly adsorbed methanol is the absorbing chromophore, with no evidence of methoxy formation. The observed frequencies for the C-O stretching vibration and other vibrational modes are shifted similar to 40 cm(-1) to the red of the corresponding fundamentals of gas-phase methanol. The spectral shifts and thus the magnitude of the cluster-methanol interaction are observed to be independent of iron cluster size over the size range studied, implying an insensitivity of the interaction to the underlying cluster structure. (C) 1996 American Institute of Physics. RP Knickelbein, MB (reprint author), ARGONNE NATL LAB, DIV CHEM, 9700 S CASS AVE, ARGONNE, IL 60439 USA. NR 33 TC 28 Z9 28 U1 2 U2 4 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 MAR 8 PY 1996 VL 104 IS 10 BP 3517 EP 3525 DI 10.1063/1.471014 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TX780 UT WOS:A1996TX78000014 ER PT J AU Parks, EK Nieman, GC Riley, SJ AF Parks, EK Nieman, GC Riley, SJ TI The reaction of manganese clusters and manganese cluster carbides with hydrogen: The Mn-CH3 bond energy SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TEMPERATURE-DEPENDENCE; MERCURY CLUSTERS; TRANSITION; RESONANCE; DEUTERIUM; ATOMS; MN-2; IONS AB Manganese clusters are formed by laser vaporization in an inert gas condensation source cooled to -160 degrees C. A pure manganese target is used as well as a manganese target containing 2 mol % carbon. The clusters are reacted with hydrogen both in the region of cluster growth and in a flow-tube reactor (FTR) downstream of the cluster source. The reactions, both with hydrogen atoms in the cluster growth region and dissociative chemisorption of H-2 in the FTR, result in hydrogen atoms bound to the clusters, except that for Mn-15 and smaller clusters the H atoms are unstable against H-2 desorption. Above Mn-15 stable hydrides are formed, but the rate of reaction in the FTR varies considerably with cluster size. This abrupt change in the ability to bind hydrogen may reflect a significant change in the character of the bonding within the cluster, perhaps from van der Waals to metallic. MnnC clusters readily react with hydrogen for n>6 to form MnnCH2. Further reactivity generally follows the pattern of the bare clusters, suggesting that the two hydrogen atoms on MnnCH2 are bound to the carbon. Under certain conditions a large intensity of MnnCH3 species (n greater than or equal to 1) is seen. From these results and earlier reports of reactions of Mn with various hydrocarbons, an energy of 1.21 +/- 0.09 eV is determined for the Mn-CH3 bond. (C) 1996 American Institute of Physics. C1 MONMOUTH COLL, DEPT CHEM, MONMOUTH, IL 61642 USA. RP Parks, EK (reprint author), ANL, DIV CHEM, 9700 S CASS AVE, ARGONNE, IL 60439 USA. NR 23 TC 19 Z9 19 U1 2 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 8 PY 1996 VL 104 IS 10 BP 3531 EP 3536 DI 10.1063/1.471058 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TX780 UT WOS:A1996TX78000016 ER PT J AU Gezelter, JD Miller, WH AF Gezelter, JD Miller, WH TI Dynamics of the photodissociation of triplet ketene SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID RATE CONSTANTS; PHOTOFRAGMENTATION; DISSOCIATION; CH2(X3B1); SYSTEMS AB Calculations of the microcanonical dissociation rate for vibrationally excited ketene on the first excited tripler surface (T-1) are presented. The calculations utilize the quantum reactive scattering methodology of absorbing boundary conditions (ABC) with a discrete variable representation (DVR) to obtain the cumulative reaction probability for dissociation over the barrier. Model 1- and 2-degree of freedom potential energy surfaces for the T, surface were obtained by fitting to the best available ab initio structures, energies, and frequencies. The dissociation rates in these reduced-dimensionality calculations give good overall agreement with the experimentally measured rates, although the steplike features seen in the experiments are washed out by the tunneling through the narrow barrier predicted in the ab initio calculations. Further model calculations reveal that a barrier frequency of approximately 50-100i cm(-1) is required to recover the step structure seen experimentally, which suggests that there is either another transition state region on the T, surface farther out towards the product channel, or that there is surface-hopping dynamics taking place between the T-1 and S-0 ketene potential energy surfaces, or that the ab initio barrier frequency is simply too large. (C) 1996 American Institute of Physics. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP Gezelter, JD (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI Gezelter, J. Daniel/D-1894-2010 OI Gezelter, J. Daniel/0000-0002-2935-3163 NR 35 TC 22 Z9 22 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD MAR 8 PY 1996 VL 104 IS 10 BP 3546 EP 3554 DI 10.1063/1.471059 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA TX780 UT WOS:A1996TX78000018 ER PT J AU Qian, H AF Qian, H TI Prediction of alpha-helices in proteins based on thermodynamic parameters from solution chemistry SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE alanine-based peptides; hydrophobic moment; helix-coil theory; protein folding; neural network ID SECONDARY STRUCTURE PREDICTION; OCCURRING AMINO-ACIDS; SEQUENCES; STABILITY AB Current studies on the protein folding problem are chiefly pursued by two approaches; one statistically investigates the three-dimensional structures of proteins and the other focuses on their thermodynamic properties in solution. It remains to be demonstrated that information from these two sources are consistent and complementary Using two sets of thermodynamic parameters experimentally obtained from solution studies, namely the helix propensities derived from small model peptides and hydrophobicity based on solvent transfer free energies for amino acids, we predict alpha-helices in native proteins. The correlation coefficient of our predictions on 98 non-homologous proteins is 0.26, a value comparable to that of the statistical prediction of Chou & Fasman but less than that from the state of the art prediction (0.39) based on neural network methodology. Helix propensities derived from different experimental systems in aqueous solutions are highly consistent for predicting alpha-helices in proteins. The helix propensities and amphiphilicity in primary sequences make independent contributions to the occurrence of alpha-helices. We also show that, with appropriate models, statistical analyses of known three-dimensional structures can provide thermodynamically relevant quantities. These findings indicate that for practical helix prediction, various sets of propensities have reached reasonable consensus. The report also suggests integrating solution thermodynamic studies with protein structural analyses, and the role of supersecondary structures on helices in proteins. (C) 1996 Academic Press Limited C1 UNIV CALIF LOS ANGELES,DOE,LAB STRUCT BIOL & MOLEC MED,LOS ANGELES,CA 90095. RP Qian, H (reprint author), UNIV CALIF LOS ANGELES,DEPT BIOMATH,LOS ANGELES,CA 90095, USA. NR 20 TC 11 Z9 11 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0022-2836 J9 J MOL BIOL JI J. Mol. Biol. PD MAR 8 PY 1996 VL 256 IS 4 BP 663 EP 666 DI 10.1006/jmbi.1996.9999 PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA TX629 UT WOS:A1996TX62900001 PM 8642588 ER PT J AU Sigman, ME Chevis, EA Brown, A Barbas, JT Dabestani, R Burch, EL AF Sigman, ME Chevis, EA Brown, A Barbas, JT Dabestani, R Burch, EL TI Enhanced photoreactivity of acenaphthylene in water: A product and mechanism study SO JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY LA English DT Article DE acenaphthylene; photochemistry; aqueous solutions; photooxidation; photodimerization ID ORGANIC-PHOTOCHEMISTRY; PHOTO-DIMERIZATION; QUANTUM YIELDS; MEDIA; FLUORESCENCE; ANTHRACENE; POLLUTANTS AB Acenaphthylene undergoes direct photolysis in dilute aqueous solutions at concentrations as low as 5 x 10(-7) M. The reactivity observed for acenaphthylene in water greatly exceeds that observed in organic solvents. The major products from direct photolysis in aerated aqueous solutions at concentrations above 5 x 10(-5) M are the cis and trans dimers of acenaphthylene. Triplet-sensitized dimerization in water produces a large excess of cis dimer (cis/trans = 14); however, direct photolysis initially produces a small excess of cis dimer (cis/trans = 1.5) and upon further conversion the ratio changes to favor the trans dimer (cis/trans = 0.6). The origin of the trans dimer is assigned to photolysis of crystalline acenaphthylene which is thought to form as a coprecipitate with cis dimer during photolysis, The origin of the cis dimer is assigned to dimerization from the triplet manifold. The increased efficiency of acenaphthylene photolysis is attributed to a hydrophobic effect and partly to an enhanced efficiency of dimerization in crystalline acenaphthylene. RP Sigman, ME (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,MS 6100,OAK RIDGE,TN 37831, USA. NR 47 TC 12 Z9 12 U1 1 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 1010-6030 J9 J PHOTOCH PHOTOBIO A JI J. Photochem. Photobiol. A-Chem. PD MAR 8 PY 1996 VL 94 IS 2-3 BP 149 EP 155 DI 10.1016/1010-6030(95)04099-4 PG 7 WC Chemistry, Physical SC Chemistry GA UE064 UT WOS:A1996UE06400011 ER PT J AU Wang, J Pamidi, PVA Renschler, CL White, C AF Wang, J Pamidi, PVA Renschler, CL White, C TI Metal-dispersed porous carbon films as electrocatalytic sensors SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY LA English DT Article DE metal doping; electrocatalysis; carbon films ID ELECTRODE; SYSTEM AB The attractive features of ultrathin porous carbon films have been coupled with the efficient catalytic action of dispersed metal particles. In particular, loading of these submicrometer foams with ruthenium or platinum centers offers a dramatic increase in the electron transfer rates of important redox systems, such as NADH, uric acid, ascorbic acid, acetaminophen, hydrazine or hydrogen peroxide. Characterization of the electrocatalytic behavior (with respect to the pH, scan rate or metal loading) and the attractive low-potential analytical (sensing) performance are reported. Scanning electron microscopy sheds useful insights into the distribution of the metals within the porous electrode matrix. C1 SANDIA NATL LABS,DIV 1812,ALBUQUERQUE,NM 87185. RP Wang, J (reprint author), NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003, USA. RI Wang, Joseph/C-6175-2011 NR 10 TC 28 Z9 28 U1 1 U2 5 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-0728 J9 J ELECTROANAL CHEM JI J. Electroanal. Chem. PD MAR 7 PY 1996 VL 404 IS 1 BP 137 EP 142 DI 10.1016/0022-0728(95)04329-2 PG 6 WC Chemistry, Analytical; Electrochemistry SC Chemistry; Electrochemistry GA UH509 UT WOS:A1996UH50900015 ER PT J AU Wallen, SL Palmer, BJ Garrett, BC Yonker, CR AF Wallen, SL Palmer, BJ Garrett, BC Yonker, CR TI Density and temperature effects on the hydrogen bond structure of liquid methanol SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID PRESSURE-DEPENDENCE; METHYL-ALCOHOL AB The hydrogen bond structure of liquid methanol was investigated as a function of pressure and temperature up to 2.8 kbar and from 297 to 413 K. Chemical. shifts of the CH3 and OH groups were monitored throughout this pressure and temperature regime, and the chemical shift difference between these two groups was used to describe changes of the hydrogen bond network in methanol. The hydrogen bond equilibrium was investigated using molecular dynamics simulations and a phenomenological model describing clustering in liquid methanol. Results are presented concerning the size and distribution of hydrogen-bonded clusters in methanol as a function of pressure and temperature. The results indicate that the extent of hydrogen bonding decreases upon an increase in temperature. The results for pressure are equivocal, the phenomenological model suggests that hydrogen bonding decreases with increasing pressure, which supports earlier interpretations regarding the measured self-diffusion coefficients in deuterated methanol as a function of pressure. The molecular dynamics simulations, however, show an increase in hydrogen bonding with increasing pressure. C1 PACIFIC NW LAB, DIV ENVIRONM & ENERGY SCI, RICHLAND, WA 99352 USA. RI Garrett, Bruce/F-8516-2011 NR 26 TC 89 Z9 90 U1 0 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 7 PY 1996 VL 100 IS 10 BP 3959 EP 3964 DI 10.1021/jp9524082 PG 6 WC Chemistry, Physical SC Chemistry GA TY919 UT WOS:A1996TY91900013 ER PT J AU Xantheas, SS Dang, LX AF Xantheas, SS Dang, LX TI Critical study of fluoride water interactions SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID LIQUID-LIQUID INTERFACE; MOLECULAR-DYNAMICS; BASIS-SETS; GAS-PHASE; CL IONS; SOLVATION; CLUSTERS; COMPLEXES; ANION; LI+ AB A new parametrization of the fluoride-water interaction within a polarizable water model is presented. Because of the absence of accurate experimental data for the enthalpy of formation of the F-(H2O) cluster, the results of ab-initio calculations were used to parametrize the ion-water interaction. The ab-initio results suggest that this interaction is 10% stronger than what was previously thought. The accuracy of the present parametrization was evaluated by comparing the model potential with the ab-initio results along the minimum energy profile for the fluoride-water interaction for various F-O separations. The energetic and structural properties of the clusters F-(H2O)(n), n = 1-10, as well as of aqueous fluoride solution are studied using molecular dynamics simulation techniques. The stronger ion-water interaction results in the appearance of interior states (configurations in which the ion is ''solvated'' by water molecules) for finite clusters with six or more water molecules. The results of the aqueous ionic solution simulations provide a reasonable description of many structural and thermodynamic properties of the solvated ion such as the solvation enthalpy, the radial distribution function, and the hydration number. RP Xantheas, SS (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, POB 999, RICHLAND, WA 99352 USA. RI Xantheas, Sotiris/L-1239-2015; OI Xantheas, Sotiris/0000-0002-6303-1037 NR 43 TC 89 Z9 89 U1 1 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 7 PY 1996 VL 100 IS 10 BP 3989 EP 3995 DI 10.1021/jp953114j PG 7 WC Chemistry, Physical SC Chemistry GA TY919 UT WOS:A1996TY91900018 ER PT J AU Trout, BL Chakraborty, AK Bell, AT AF Trout, BL Chakraborty, AK Bell, AT TI Local spin density functional theory study of copper ion-exchanged ZSM-5 SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID NITRIC-OXIDE; CATALYTIC DECOMPOSITION; NITROGEN MONOXIDE; NO DECOMPOSITION; ZEOLITES; CU; REDUCTION; CU-ZSM-5; PSEUDOPOTENTIALS; APPROXIMATIONS AB We have used local spin density functional theory to investigate the electronic and structural properties of Cu species (Cu+, Cu2+O-, and Cu2+OH-) interacting with isolated =Al-O--Si= sites CuZSM-5. We have also evaluated the thermodynamic stability of these species and the thermodynamics of a proposed scheme for the autoreduction of Cu2+ to Cu+. We have found all of the species studied to be thermodynamically stable and the proposed autoreduction process to be thermodynamically feasible at temperatures normally encountered in the pretreatment of as-exchanged CuZSM-5. In addition, we have investigated the interactions of Cu2+ cations with both 6-T site and 5-T site ring structures containing two Al atoms. We have found that Cu2+ in a 6-T site ring structure is thermodynamically unstable, while that in a 5-T site ring structure is thermodynamically stable. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. OI Bell, Alexis/0000-0002-5738-4645 NR 52 TC 89 Z9 91 U1 0 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 7 PY 1996 VL 100 IS 10 BP 4173 EP 4179 DI 10.1021/jp9524744 PG 7 WC Chemistry, Physical SC Chemistry GA TY919 UT WOS:A1996TY91900042 ER PT J AU Mao, Y Bakac, A AF Mao, Y Bakac, A TI Photocatalytic oxidation of toluene to benzaldehyde by molecular oxygen SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID ELECTRON-TRANSFER REACTIONS; EXCITED-STATES; URANYL-ION; RADICALS AB The visible light irradiation of aqueous solutions containing toluene, uranyl(VI) ions, and O-2 results in the formation of benzaldehyde as a major product. Small amounts of PhCH(2)OH are also formed. The yields of benzaldehyde are 3 times greater for toluene-h(8) than for toluene-d(8), but the kinetic isotope effect for the quenching of the excited state *UO22+ by toluene is negligible (k(toluene-h8)/k(toluene-d8) = 1.2) This and other evidence indicate that the quenching takes place in two parallel pathways. The major one involves the aromatic portion of toluene and leads to the recovery of the reactants. The minor, productive path takes place by hydrogen atom abstraction from the methyl group, followed by the oxidation of PhCH(2)(.). Cumene, benzyl alcohol, and benzaldehyde react similarly. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 36 TC 31 Z9 32 U1 2 U2 11 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD MAR 7 PY 1996 VL 100 IS 10 BP 4219 EP 4223 DI 10.1021/jp9529376 PG 5 WC Chemistry, Physical SC Chemistry GA TY919 UT WOS:A1996TY91900049 ER PT J AU Corbett, JD AF Corbett, JD TI Diverse solid-state clusters with strong metal-metal bonding. In praise of synthesis SO JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS LA English DT Article; Proceedings Paper CT 1st Dalton Discussion on Metal Clusters CY JAN 03-05, 1996 CL UNIV SOUTHAMPTON, SOUTHAMPTON, ENGLAND HO UNIV SOUTHAMPTON ID ZIRCONIUM CHLORIDE CLUSTERS; TRANSITION-ELEMENTS; INTERSTITIAL ATOMS; IODIDE CLUSTERS; INDIUM CLUSTERS; ZINTL-PHASES; INTERMETALLIC COMPOUNDS; CRYSTAL-STRUCTURE; CHEMISTRY; ENCAPSULATION AB The synthesis, structure and bonding of two types of metal clusters are described. A large family of zirconium cluster halides of the general type A(x)(1)Zr(6)(Z)X(12+n) are obtained with A = Na to Cs, X = Cl, Pr or I, 0 < x, n less than or equal to 6, and the required interstitial Z atom as variables. Extension to the rare-earth elements (Sc, Y, lanthanides) gives some new, hypostoichiometric cluster variations as well as condensed oligomeric and infinite-chain compounds. Zintl-phase concepts and the alkali-metal compounds that contain anionic 'naked' clusters or cluster networks of the triel elements Ga, In and T1 are also covered. The clusters include empty hypoelectronic examples as well as those that are centred by a heterometal or a triel element. The last compounds are remarkable parallels of the interstitial halides described. C1 IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. NR 85 TC 80 Z9 80 U1 1 U2 6 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1472-7773 J9 J CHEM SOC DALTON JI J. Chem. Soc.-Dalton Trans. PD MAR 7 PY 1996 IS 5 BP 575 EP 587 DI 10.1039/dt9960000575 PG 13 WC Chemistry, Inorganic & Nuclear SC Chemistry GA TZ019 UT WOS:A1996TZ01900004 ER PT J AU Fadley, CS Len, PM AF Fadley, CS Len, PM TI Atomic imaging - Holography with X-rays SO NATURE LA English DT Editorial Material ID ENERGY PHOTOELECTRON HOLOGRAPHY; ELECTRON-EMISSION HOLOGRAPHY C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP Fadley, CS (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. NR 16 TC 14 Z9 14 U1 1 U2 2 PU MACMILLAN MAGAZINES LTD PI LONDON PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF SN 0028-0836 J9 NATURE JI Nature PD MAR 7 PY 1996 VL 380 IS 6569 BP 27 EP 28 DI 10.1038/380027a0 PG 2 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA TY877 UT WOS:A1996TY87700035 ER PT J AU Kawasaki, M Moroi, T Yanagida, T AF Kawasaki, M Moroi, T Yanagida, T TI Constraint on the reheating temperature from the decay of the Polonyi field SO PHYSICS LETTERS B LA English DT Article ID COSMOLOGICAL IMPLICATIONS; SUPERSTRING MODELS; SUPERGRAVITY; DILATION AB We study the Polonyi problem in the framework of no-scale type supergravity models. We show that the lightest superparticle (LSP) produced in the decay of the Polonyi field may contribute too much to the present density of the universe. By requiring that LSP should not overdose the universe, we obtain a stringent constraint on the reheating temperature after the decay of the Polonyi field. We calculate the LSP density with physical parameters obtained by solving renormalization group equations in the minimal supersymmetric SU(5) model and find that the reheating temperature should be greater than about 100 MeV which corresponds to O(100) TeV of the Polonyi mass. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. UNIV TOKYO,DEPT PHYS,TOKYO 133,JAPAN. UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106. RP Kawasaki, M (reprint author), UNIV TOKYO,INST COSM RAY RES,TOKYO 188,JAPAN. RI Yanagida, Tsutomu/A-4394-2011 NR 17 TC 67 Z9 67 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD MAR 7 PY 1996 VL 370 IS 1-2 BP 52 EP 58 DI 10.1016/0370-2693(95)01546-9 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UA241 UT WOS:A1996UA24100010 ER PT J AU Feng, FL Polonsky, N Thomas, S AF Feng, FL Polonsky, N Thomas, S TI The light Higgsino-gaugino window SO PHYSICS LETTERS B LA English DT Article ID SUPERSYMMETRIC STANDARD MODEL; LOW-ENERGY SUPERGRAVITY; GLUINO WINDOW; Z-DECAYS; NEUTRALINO; PARTICLES; VIOLATION; PHYSICS; LEP AB Supersymmetric models are typically taken to have mu parameter and all soft supersymmetry breaking parameters at or near the weak scale. We point out that a small window of allowed values exists in which mu and the electroweak gaugino masses are in the few GeV range. Such models naturally solve the supersymmetry CP problem, can reduce the discrepancy in R(b). and suppress proton decay. In this window two neutralinos are in the few GeV range, two are roughly degenerate with the Z(0), and both charginos are roughly degenerate with the W-+/- bosons. Such a signature cannot escape detection at LEP II. Models that fall in this window automatically arise from renormalizable hidden sectors in which hidden sector singlets participate only radiatively in supersymmetry breaking. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV MUNICH,SEKT PHYS,LEHRSTUHL PROF WESS,D-80333 MUNICH,GERMANY. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106. RP Feng, FL (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720, USA. NR 70 TC 31 Z9 31 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 MAR 7 PY 1996 VL 370 IS 1-2 BP 95 EP 105 DI 10.1016/0370-2693(95)01544-2 PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UA241 UT WOS:A1996UA24100015 ER PT J AU Bagan, E Lavelle, M McMullan, D AF Bagan, E Lavelle, M McMullan, D TI The physical propagator of a slowly moving charge SO PHYSICS LETTERS B LA English DT Article ID QUANTUM ELECTRODYNAMICS; ASYMPTOTIC COMPLETENESS; SECTORS; STATES AB We consider an electron which is electromagnetically dressed in such a way that it is both gauge invariant and that it has the associated electric and magnetic fields expected of a moving charge, We study the propagator of this dressed electron and, for small velocities, show explicitly at one loop that at the natural (on-shell) renormalisation point, p(0) = m,p = mv, one can renormalise the propagator multiplicatively. Furthermore the renormalisation constants are infra-red finite. This shows that the dressing we use corresponds to a slowly moving, physical asymptotic field. C1 AUTONOMOUS UNIV BARCELONA,FIS TEOR GRP,E-08193 BARCELONA,SPAIN. AUTONOMOUS UNIV BARCELONA,IFAE,E-08193 BARCELONA,SPAIN. UNIV PLYMOUTH,SCH MATH & STAT,PLYMOUTH PL4 8AA,DEVON,ENGLAND. RP Bagan, E (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,BLDG 510A,UPTON,NY 11973, USA. NR 28 TC 7 Z9 7 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 MAR 7 PY 1996 VL 370 IS 1-2 BP 128 EP 134 DI 10.1016/0370-2693(96)00049-4 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UA241 UT WOS:A1996UA24100020 ER PT J AU Acciarri, M Adam, A Adriani, O AguilarBenitez, M Ahlen, S Alpat, B Alcaraz, J Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Antreasyan, D Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Ball, RC Banerjee, S Banicz, K Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Battiston, R Bay, A Becattini, F Becker, U Behner, F Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biasini, M Biland, A Bilei, GM Blaising, JJ Blyth, SC Bobbink, GJ Bock, R Bohm, A Borgia, B Boucham, A Bourilkov, D Bourquin, M Boutigny, D Brambilla, E Branson, JG Brigljevic, V Brock, IC Buijs, A Bujak, A Burger, JD Burger, JW Burgos, C Busenitz, J Buytenhuijs, A Cai, XD Campanelli, M Capell, M Romero, GC Caria, M Carlino, G Cartacci, AM Casaus, J Castellini, G Castello, R Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chan, A Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, G Chen, GM Chen, HF Chen, HS Cherau, X Chiefari, G Chien, CY Choi, MT Cifarelli, L Cindolo, F Civinini, C Clare, I Clare, R Coan, TE Cohn, HO Coignet, G Colijn, AP Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Dai, TS DAlessandro, R deAsmundis, R DeBoeck, H Degre, A Deiters, K Denes, E Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dorne, I Dova, MT Drago, E Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabbretti, R Fabre, M Faccini, R Falciano, S Favara, A Fay, J Felcini, M Ferguson, T Fernandez, D Fernandez, G Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Forconi, G Fredj, L Freudenreich, K Gailloud, M Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gerald, J Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZF Gonzalez, E Gougas, A Goujon, D Gratta, C Gruenewald, MW Gupta, VK Gurtu, A Gustafson, HR Gutay, LJ Hangarter, K Hartmann, B Hasan, A He, JT Hebbeker, T Herve, A vanHoek, WC Hofer, H Hoorani, H Hou, SR Hu, G Ilyas, MM Innocente, V Janssen, H Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamyshkov, Y Kapinos, P Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, JK Kim, SC Kim, JG Kinnison, WW Kirkby, A Kirkby, J Kittel, W Klimentov, A Konig, AC Koffeman, E Kongeter, A Koutsendo, V Koulbardis, A Kraemer, RW Kramer, T Krenz, W Kuijten, H Kunin, A deGuevara, PL Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P Lee, J Lee, KY Leggett, C LeGoff, JM Leiste, R Lenti, M Leonardi, E Levtchenko, P Li, C Lieb, E Lin, WT Linde, FL Lindemann, B Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Ludovici, L Luminari, L Lustermann, W Ma, WG Macchiolo, A Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangla, S Maolinbay, M Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG Mazumdar, K McNally, D McNeil, RR Mele, S Merola, L Meschini, M Metzger, WJ vonderMey, M Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Moller, M Monteleoni, B Moore, R Morganti, S Mount, R Muller, S Muheim, F Nagy, E Nahn, S Napolitano, M NessiTedaldi, F Newman, H AF Acciarri, M Adam, A Adriani, O AguilarBenitez, M Ahlen, S Alpat, B Alcaraz, J Allaby, J Aloisio, A Alverson, G Alviggi, MG Ambrosi, G Anderhub, H Andreev, VP Angelescu, T Antreasyan, D Arefiev, A Azemoon, T Aziz, T Bagnaia, P Baksay, L Ball, RC Banerjee, S Banicz, K Barillere, R Barone, L Bartalini, P Baschirotto, A Basile, M Battiston, R Bay, A Becattini, F Becker, U Behner, F Bencze, GL Berdugo, J Berges, P Bertucci, B Betev, BL Biasini, M Biland, A Bilei, GM Blaising, JJ Blyth, SC Bobbink, GJ Bock, R Bohm, A Borgia, B Boucham, A Bourilkov, D Bourquin, M Boutigny, D Brambilla, E Branson, JG Brigljevic, V Brock, IC Buijs, A Bujak, A Burger, JD Burger, JW Burgos, C Busenitz, J Buytenhuijs, A Cai, XD Campanelli, M Capell, M Romero, GC Caria, M Carlino, G Cartacci, AM Casaus, J Castellini, G Castello, R Cavallari, F Cavallo, N Cecchi, C Cerrada, M Cesaroni, F Chamizo, M Chan, A Chang, YH Chaturvedi, UK Chemarin, M Chen, A Chen, C Chen, G Chen, GM Chen, HF Chen, HS Cherau, X Chiefari, G Chien, CY Choi, MT Cifarelli, L Cindolo, F Civinini, C Clare, I Clare, R Coan, TE Cohn, HO Coignet, G Colijn, AP Colino, N Commichau, V Costantini, S Cotorobai, F delaCruz, B Dai, TS DAlessandro, R deAsmundis, R DeBoeck, H Degre, A Deiters, K Denes, E Denes, P DeNotaristefani, F DiBitonto, D Diemoz, M vanDierendonck, D DiLodovico, F Dionisi, C Dittmar, M Dominguez, A Doria, A Dorne, I Dova, MT Drago, E Duchesneau, D Duinker, P Duran, I Dutta, S Easo, S Efremenko, Y ElMamouni, H Engler, A Eppling, FJ Erne, FC Ernenwein, JP Extermann, P Fabbretti, R Fabre, M Faccini, R Falciano, S Favara, A Fay, J Felcini, M Ferguson, T Fernandez, D Fernandez, G Ferroni, F Fesefeldt, H Fiandrini, E Field, JH Filthaut, F Fisher, PH Forconi, G Fredj, L Freudenreich, K Gailloud, M Galaktionov, Y Ganguli, SN GarciaAbia, P Gau, SS Gentile, S Gerald, J Gheordanescu, N Giagu, S Goldfarb, S Goldstein, J Gong, ZF Gonzalez, E Gougas, A Goujon, D Gratta, C Gruenewald, MW Gupta, VK Gurtu, A Gustafson, HR Gutay, LJ Hangarter, K Hartmann, B Hasan, A He, JT Hebbeker, T Herve, A vanHoek, WC Hofer, H Hoorani, H Hou, SR Hu, G Ilyas, MM Innocente, V Janssen, H Jin, BN Jones, LW deJong, P JosaMutuberria, I Kasser, A Khan, RA Kamyshkov, Y Kapinos, P Kapustinsky, JS Karyotakis, Y Kaur, M KienzleFocacci, MN Kim, D Kim, JK Kim, SC Kim, JG Kinnison, WW Kirkby, A Kirkby, J Kittel, W Klimentov, A Konig, AC Koffeman, E Kongeter, A Koutsendo, V Koulbardis, A Kraemer, RW Kramer, T Krenz, W Kuijten, H Kunin, A deGuevara, PL Landi, G Lapoint, C LassilaPerini, K Laurikainen, P Lebeau, M Lebedev, A Lebrun, P Lecomte, P Lecoq, P LeCoultre, P Lee, J Lee, KY Leggett, C LeGoff, JM Leiste, R Lenti, M Leonardi, E Levtchenko, P Li, C Lieb, E Lin, WT Linde, FL Lindemann, B Lista, L Liu, ZA Lohmann, W Longo, E Lu, W Lu, YS Lubelsmeyer, K Luci, C Luckey, D Ludovici, L Luminari, L Lustermann, W Ma, WG Macchiolo, A Maity, M Majumder, G Malgeri, L Malinin, A Mana, C Mangla, S Maolinbay, M Marchesini, P Marin, A Martin, JP Marzano, F Massaro, GGG Mazumdar, K McNally, D McNeil, RR Mele, S Merola, L Meschini, M Metzger, WJ vonderMey, M Mi, Y Mihul, A vanMil, AJW Mirabelli, G Mnich, J Moller, M Monteleoni, B Moore, R Morganti, S Mount, R Muller, S Muheim, F Nagy, E Nahn, S Napolitano, M NessiTedaldi, F Newman, H TI Measurement of hadron and lepton-pair production at 130 GeVGAMMA-GAMMA; NEUTRINOS; ELECTRONS; ENERGIES AB We report on a search for the excited leptons e*, mu*, tau* and nu* in e(+)e(-) collisions at root s = 130-140 GeV using the L3 detector at LEP. No evidence has been found for their existence. From an analysis of the expected pair produced l*l* in the channels ee gamma gamma, mu mu gamma gamma, tau tau gamma gamma, eeWW, and nu nu gamma gamma, We determine the lower mass limits at 95% C.L. of 64.7 GeV for e*, 64.9 GeV for mu*, 64.2 GeV for tau*, 57.3 GeV (eW decay mode) and 61.4 GeV (nu gamma decay mode) for nu*. From an analysis of the expected singly produced ll* in the channels ee gamma, mu mu gamma, tau tau gamma, nu eW and nu nu gamma, we determine upper limits on the couplings lambda/m(l*) up to m(l*) = 130 GeV. C1 RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY. NATL INST NUCL & HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS. UNIV AMSTERDAM, 1009 DB AMSTERDAM, NETHERLANDS. UNIV MICHIGAN, ANN ARBOR, MI 48109 USA. LAB ANNECY LE VIEUX PHYS PARTICULES, CNRS, IN2P3, F-74941 ANNECY LE VIEUX, FRANCE. JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA. UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND. LOUISIANA STATE UNIV, BATON ROUGE, LA 70803 USA. INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA. INST HIGH ENERGY PHYS, D-10099 BERLIN, GERMANY. IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY. TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA. BOSTON UNIV, BOSTON, MA 02215 USA. NORTHEASTERN UNIV, BOSTON, MA 02115 USA. INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA. UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA. HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY. HARVARD UNIV, CAMBRIDGE, MA 02139 USA. MIT, CAMBRIDGE, MA 02139 USA. IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY. UNIV FLORENCE, I-50125 FLORENCE, ITALY. CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND. WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND. UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND. UNIV SCI & TECHNOL CHINA, HEFEI 230029, ANHUI, PEOPLES R CHINA. RES INST HIGH ENERGY PHYS, SF-00014 HELSINKI, FINLAND. UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND. IST NAZL FIS NUCL, I-73100 LECCE, ITALY. UNIV LECCE, I-73100 LECCE, ITALY. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. UNIV LYON 1, CNRS, INST PHYS NUCL LYON, IN2P3, F-69622 VILLEURBANNE, FRANCE. CIEMAT, E-28040 MADRID, SPAIN. IST NAZL FIS NUCL, I-20133 MILAN, ITALY. INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA. IST NAZL FIS NUCL, I-80125 NAPLES, ITALY. UNIV NAPLES, I-80125 NAPLES, ITALY. UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS. CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS. NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. CALTECH, PASADENA, CA 91125 USA. IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY. UNIV PERUGIA, I-06100 PERUGIA, ITALY. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. PRINCETON UNIV, PRINCETON, NJ 08544 USA. IST NAZL FIS NUCL, I-00185 ROME, ITALY. UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY. INST PHYS NUCL, ST PETERSBURG, RUSSIA. UNIV SALERNO, I-84100 SALERNO, ITALY. IST NAZL FIS NUCL, I-84100 SALERNO, ITALY. UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA. UNIV SANTIAGO DE COMPOSTELA, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN. BULGARIAN ACAD SCI, CENT LAB MECHATR & INSTRUMENT, BU-1113 SOFIA, BULGARIA. KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA. UNIV ALABAMA, TUSCALOOSA, AL 35486 USA. UNIV UTRECHT, 3584 CB UTRECHT, NETHERLANDS. NIKHEF, 3584 CB UTRECHT, NETHERLANDS. PURDUE UNIV, W LAFAYETTE, IN 47907 USA. PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND. DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY. ETH ZURICH, CH-8093 ZURICH, SWITZERLAND. UNIV HAMBURG, D-22761 HAMBURG, GERMANY. HIGH ENERGY PHYS GRP, TAIPEI, TAIWAN. RP Acciarri, M (reprint author), RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY. RI Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015; D'Alessandro, Raffaello/F-5897-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge, francisco javier/H-9682-2015; Sanchez, Eusebio/H-5228-2015; Rancoita, Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Roth, Stefan/J-2757-2016; Kamyshkov, Yuri/J-7999-2016; alpat, ali behcet/G-6290-2013; bertucci, bruna/J-5237-2012; Cavallo, Nicola/F-8913-2012; Cerrada, Marcos/J-6934-2014; de la Cruz, Begona/K-7552-2014; Josa, Isabel/K-5184-2014; Gonzalez Romero, Enrique/L-7561-2014; Fiandrini, Emanuele/C-4549-2008; Lista, Luca/C-5719-2008; Ludovici, Lucio/F-5917-2011; Kirkby, Jasper/A-4973-2012; Servoli, Leonello/E-6766-2012; Vogel, Helmut/N-8882-2014 OI Ferguson, Thomas/0000-0001-5822-3731; Berdugo, Javier/0000-0002-7911-8532; D'Alessandro, Raffaello/0000-0001-7997-0306; Sanchez, Eusebio/0000-0002-9646-8198; Rancoita, Pier Giorgio/0000-0002-1990-4283; Roth, Stefan/0000-0003-3616-2223; Kamyshkov, Yuri/0000-0002-3789-7152; alpat, ali behcet/0000-0002-0116-1506; Cerrada, Marcos/0000-0003-0112-1691; Gonzalez Romero, Enrique/0000-0003-2376-8920; Ludovici, Lucio/0000-0003-1970-9960; Kirkby, Jasper/0000-0003-2341-9069; Servoli, Leonello/0000-0003-1725-9185; Vogel, Helmut/0000-0002-6109-3023 NR 38 TC 20 Z9 20 U1 1 U2 6 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 MAR 7 PY 1996 VL 370 IS 1-2 BP 211 EP 221 DI 10.1016/0370-2693(96)00045-7 PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UA241 UT WOS:A1996UA24100031 ER PT J AU Frabetti, PL Cheung, HWK Cumalat, JP Dallapiccola, C Ginkel, JF Johns, WE Nehring, MS Butler, JN Cihangir, S Gaines, I Garbincius, PH Garren, L Gourlay, SA Harding, DJ Kasper, P Kreymer, A Lebrun, P Shukla, S Vittone, M Bianco, S Fabbri, FL Sarwar, S Zallo, A Culbertson, R Gardner, RW Greene, R Wiss, J Alimonti, G Bellini, G Boschini, M Brambilla, D Caccianiga, B Cinquini, L DiCorato, M Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Meroni, E Moroni, L Pedrini, D Perasso, L Prelz, F Sala, A Sala, S Torretta, D Buchholz, D Claes, D Gobbi, B OReilly, B Bishop, JM Cason, NM Kennedy, CJ Kim, GN Lin, TF Puseljic, DL Ruchti, RC Shephard, WD Swiatek, JA Wu, ZY Arena, V Boca, G Castoldi, C Gianini, G Ratti, SP Riccardi, C Viola, L Vitulo, P Lopez, A Grim, GP Paolone, VS Yager, PM Wilson, JR Sheldon, PD Davenport, F Blackett, GR Danyo, K Pisharody, M Handler, T Cheon, BG Kang, JS Kim, KY AF Frabetti, PL Cheung, HWK Cumalat, JP Dallapiccola, C Ginkel, JF Johns, WE Nehring, MS Butler, JN Cihangir, S Gaines, I Garbincius, PH Garren, L Gourlay, SA Harding, DJ Kasper, P Kreymer, A Lebrun, P Shukla, S Vittone, M Bianco, S Fabbri, FL Sarwar, S Zallo, A Culbertson, R Gardner, RW Greene, R Wiss, J Alimonti, G Bellini, G Boschini, M Brambilla, D Caccianiga, B Cinquini, L DiCorato, M Giammarchi, M Inzani, P Leveraro, F Malvezzi, S Menasce, D Meroni, E Moroni, L Pedrini, D Perasso, L Prelz, F Sala, A Sala, S Torretta, D Buchholz, D Claes, D Gobbi, B OReilly, B Bishop, JM Cason, NM Kennedy, CJ Kim, GN Lin, TF Puseljic, DL Ruchti, RC Shephard, WD Swiatek, JA Wu, ZY Arena, V Boca, G Castoldi, C Gianini, G Ratti, SP Riccardi, C Viola, L Vitulo, P Lopez, A Grim, GP Paolone, VS Yager, PM Wilson, JR Sheldon, PD Davenport, F Blackett, GR Danyo, K Pisharody, M Handler, T Cheon, BG Kang, JS Kim, KY TI Charm-anticharm asymmetries in high energy photoproduction SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS; MECHANISMS AB We report measurements of charm particle production asymmetries from the Fermilab photoproduction experiment E687. An asymmetry in the rate of production of charm versus anticharm particles is expected to arise primarily from fragmentation effects. We observe statistically significant asymmetries in the photoproduction of D+, D-*+ and D-0 mesons and find small (but statistically weak) asymmetries in the production of the D-s(+) meson and the Lambda(c)(+) baryon. Our inclusive photoproduction asymmetries are compared to predictions from nonperturbative models of charm quark fragmentation. C1 IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY. UNIV COLORADO,BOULDER,CO 80309. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV ILLINOIS,URBANA,IL 61801. UNIV MILAN,DEPT FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-20133 MILAN,ITALY. NORTHWESTERN UNIV,EVANSTON,IL 60208. UNIV NOTRE DAME,NOTRE DAME,IN 46556. UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY. IST NAZL FIS NUCL,I-27100 PAVIA,ITALY. UNIV PUERTO RICO,MAYAGUEZ,PR 00709. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV S CAROLINA,COLUMBIA,SC 29208. VANDERBILT UNIV,NASHVILLE,TN 37235. UNIV N CAROLINA,ASHEVILLE,NC 28804. UNIV TENNESSEE,KNOXVILLE,TN 37996. KOREA UNIV,SEOUL 136701,SOUTH KOREA. RP Frabetti, PL (reprint author), UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY. RI Menasce, Dario Livio/A-2168-2016; Gianini, Gabriele/M-5195-2014; OI Menasce, Dario Livio/0000-0002-9918-1686; Gianini, Gabriele/0000-0001-5186-0199; bianco, stefano/0000-0002-8300-4124 NR 16 TC 30 Z9 31 U1 0 U2 3 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 MAR 7 PY 1996 VL 370 IS 1-2 BP 222 EP 232 DI 10.1016/0370-2693(96)00085-8 PG 11 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UA241 UT WOS:A1996UA24100032 ER PT J AU Abachi, S Abbott, B Abolins, M Acharya, BS Adam, I Adams, DL Adams, M Ahn, S Aihara, H Alitti, J Alvarez, G Alves, GA Amidi, E Amos, N Anderson, EW Aronson, SH Astur, R Avery, RE Baden, A Balamurali, V Balderston, J Baldin, B Bantly, J Bartlett, JF Bazizi, K Bendich, J Beri, SB Bertram, I Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Bischoff, A Biswas, N Blazey, G Blessing, S Bloom, P Boehnlein, A Bojko, NI Borcherding, F Borders, J Boswell, C Brandt, A Brock, R Bross, A Buchholz, D Burtovoi, VS Butler, JM Carvalho, W Casey, D CastillaValdez, H Chakraborty, D Chang, SM Chekulaev, SV Chen, LP Chen, W Chopra, S Choudhary, BC Christenson, JH Chung, M Cobau, WG Cochran, J Cooper, WE Cretsinger, C Claes, D Clark, AR CullenVidal, D Cummings, MAC Cutts, D Dahl, OI De, K Demarteau, M Demina, R Denisenko, K Denisenko, N Denisov, D Denisov, SP Diehl, HT Diesburg, M DiLoreto, G Dixon, R Draper, P Drinkard, J Ducros, Y Dugad, SR DurstonJohnson, S Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Evdokimov, VN Fahey, S Fahland, T Fatyga, M Fatyga, MK Featherly, J Feher, S Fein, D Ferbel, T Finocchiaro, G Fisk, HE Fisyak, Y Flattum, E Forden, GE Fortner, M Frame, KC Franzini, P Fuess, S Gallas, E Galyaev, AN Geld, T Genik, RJ Genser, K Gerber, CE Gibbard, B Glebov, V Glenn, S Glicenstein, JF Gobbi, B Goforth, M Goldschmidt, A Gomez, B Goncharov, PI Gonzalez, JL Gordon, H Goss, LT Graf, N Grannis, PD Green, DR Green, J Greenlee, H Griffin, G Grossman, N Grundberg, P Grunendahl, S Gu, WX Guglielmo, G Guida, JA Guida, JM Guryn, W Gurzhiev, SN Gutierrez, P Gutnikov, YE Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hahn, KS Hall, RE Hansen, S Hatcher, R Hauptman, JM Hedin, D Heinson, AP Heintz, U HernandezMontoya, R Heuring, T Hirosky, R Hobbs, JD Hoeneisen, B Hoftun, JS Hsieh, F Hu, T Hu, T Hu, T Huehn, T Igarashi, S Ito, AS James, E Jaques, J Jerger, SA Jiang, JZY JoffeMinor, T Johari, H Johns, K Johnson, M Johnstad, H Jonckheere, A Jones, M Jostlein, H Jun, SY Jung, CK Kahn, S Kalbfleisch, G Kang, JS Kehoe, R Kelly, ML Kerth, L Kim, CL Kim, SK Klatchko, A Klima, B Klochkov, BI Klopfenstein, C Klyukhin, VI Kochetkov, VI Kohli, JM Koltick, D Kostritskiy, AV Kotcher, J Kourlas, J Kozelov, AV Kozlovski, EA Krishnaswamy, MR Krzywdzinski, S Kunori, S Lami, S Landsberg, G Lebrat, JF Leflat, A Li, H Li, J Li, YK LiDemarteau, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Liu, YC Lobkowicz, F Loken, SC Lokos, S Lueking, L Lyon, AL Maciel, AKA Madaras, RJ Madden, R Mani, S Mao, HS Margulies, S Markeloff, R Markosky, L Marshall, T Martin, MI Marx, M May, B Mayorov, AA McCarthy, R McKibben, T McKinley, J McMahon, T Melanson, HL Neto, JRTD Merritt, KW Miettinen, H Mincer, A deMiranda, JM Mishra, CS MohammadiBaarmand, M Mokhov, N Mondal, NK Montgomery, HE Mooney, P daMotta, H Mudan, M Murphy, C Negret, JP Neis, E Nemethy, P Nesic, D Nicola, M Norman, D Oesch, L Oguri, V Oltman, E Oshima, N Owen, D Padley, P Pang, M Para, A Park, CH Park, YM Partridge, R Parua, N Paterno, M Perkins, J Peryshkin, A Peters, M Piekarz, H Pischalnikov, Y Podstavkov, VM Pope, BG Prosper, HB Protopopescu, S Puseljic, D Qian, J Quintas, PZ Raja, R Rajagopalan, S Ramirez, O Rao, MVS Rapidis, PA Rasmussen, L Read, AL Reucroft, S AF Abachi, S Abbott, B Abolins, M Acharya, BS Adam, I Adams, DL Adams, M Ahn, S Aihara, H Alitti, J Alvarez, G Alves, GA Amidi, E Amos, N Anderson, EW Aronson, SH Astur, R Avery, RE Baden, A Balamurali, V Balderston, J Baldin, B Bantly, J Bartlett, JF Bazizi, K Bendich, J Beri, SB Bertram, I Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Bischoff, A Biswas, N Blazey, G Blessing, S Bloom, P Boehnlein, A Bojko, NI Borcherding, F Borders, J Boswell, C Brandt, A Brock, R Bross, A Buchholz, D Burtovoi, VS Butler, JM Carvalho, W Casey, D CastillaValdez, H Chakraborty, D Chang, SM Chekulaev, SV Chen, LP Chen, W Chopra, S Choudhary, BC Christenson, JH Chung, M Cobau, WG Cochran, J Cooper, WE Cretsinger, C Claes, D Clark, AR CullenVidal, D Cummings, MAC Cutts, D Dahl, OI De, K Demarteau, M Demina, R Denisenko, K Denisenko, N Denisov, D Denisov, SP Diehl, HT Diesburg, M DiLoreto, G Dixon, R Draper, P Drinkard, J Ducros, Y Dugad, SR DurstonJohnson, S Edmunds, D Ellison, J Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Evdokimov, VN Fahey, S Fahland, T Fatyga, M Fatyga, MK Featherly, J Feher, S Fein, D Ferbel, T Finocchiaro, G Fisk, HE Fisyak, Y Flattum, E Forden, GE Fortner, M Frame, KC Franzini, P Fuess, S Gallas, E Galyaev, AN Geld, T Genik, RJ Genser, K Gerber, CE Gibbard, B Glebov, V Glenn, S Glicenstein, JF Gobbi, B Goforth, M Goldschmidt, A Gomez, B Goncharov, PI Gonzalez, JL Gordon, H Goss, LT Graf, N Grannis, PD Green, DR Green, J Greenlee, H Griffin, G Grossman, N Grundberg, P Grunendahl, S Gu, WX Guglielmo, G Guida, JA Guida, JM Guryn, W Gurzhiev, SN Gutierrez, P Gutnikov, YE Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hahn, KS Hall, RE Hansen, S Hatcher, R Hauptman, JM Hedin, D Heinson, AP Heintz, U HernandezMontoya, R Heuring, T Hirosky, R Hobbs, JD Hoeneisen, B Hoftun, JS Hsieh, F Hu, T Hu, T Hu, T Huehn, T Igarashi, S Ito, AS James, E Jaques, J Jerger, SA Jiang, JZY JoffeMinor, T Johari, H Johns, K Johnson, M Johnstad, H Jonckheere, A Jones, M Jostlein, H Jun, SY Jung, CK Kahn, S Kalbfleisch, G Kang, JS Kehoe, R Kelly, ML Kerth, L Kim, CL Kim, SK Klatchko, A Klima, B Klochkov, BI Klopfenstein, C Klyukhin, VI Kochetkov, VI Kohli, JM Koltick, D Kostritskiy, AV Kotcher, J Kourlas, J Kozelov, AV Kozlovski, EA Krishnaswamy, MR Krzywdzinski, S Kunori, S Lami, S Landsberg, G Lebrat, JF Leflat, A Li, H Li, J Li, YK LiDemarteau, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Liu, YC Lobkowicz, F Loken, SC Lokos, S Lueking, L Lyon, AL Maciel, AKA Madaras, RJ Madden, R Mani, S Mao, HS Margulies, S Markeloff, R Markosky, L Marshall, T Martin, MI Marx, M May, B Mayorov, AA McCarthy, R McKibben, T McKinley, J McMahon, T Melanson, HL Neto, JRTD Merritt, KW Miettinen, H Mincer, A deMiranda, JM Mishra, CS MohammadiBaarmand, M Mokhov, N Mondal, NK Montgomery, HE Mooney, P daMotta, H Mudan, M Murphy, C Negret, JP Neis, E Nemethy, P Nesic, D Nicola, M Norman, D Oesch, L Oguri, V Oltman, E Oshima, N Owen, D Padley, P Pang, M Para, A Park, CH Park, YM Partridge, R Parua, N Paterno, M Perkins, J Peryshkin, A Peters, M Piekarz, H Pischalnikov, Y Podstavkov, VM Pope, BG Prosper, HB Protopopescu, S Puseljic, D Qian, J Quintas, PZ Raja, R Rajagopalan, S Ramirez, O Rao, MVS Rapidis, PA Rasmussen, L Read, AL Reucroft, S TI J/Psi production in p(p)over-bar collisions at root s=1.8 TeV SO PHYSICS LETTERS B LA English DT Article DE beauty; Charmonium; QCD; tevatron ID = 1.8 TEV; B-QUARK PRODUCTION; (P)OVER-BAR-P COLLISIONS; HADRON-COLLISIONS; COLLIDER; TRIGGER AB We have studied J/psi production in p (p) over bar collisions at root s = 1.8 TeV with the DO detector at Fermilab using mu(+)mu(-) data. We have measured the inclusive J/psi production cross section as a function of J/psi transverse momentum, p(T). For the kinematic range p(T) > 8 GeV/c and \eta\ < 0.6 we obtain sigma(p (p) over bar --> J/psi + X) . Br(J/psi --> mu(+)mu(-)) = 2.08 +/- 0.17(stat) +/- 0.46(syst) nb. Using the muon impact parameter we have estimated the fraction of J/psi mesons coming from B meson decays to be f(b) = 0.35 +/- 0.09(stat) +/- 0.10(syst) and inferred the inclusive b production cross section. From the information on the event topology the fraction of nonisolated J/psi events has been measured to be f(nonisol) = 0.64 +/- 0.08(stat) +/- 0.06(syst). We have also obtained the fraction of J/psi events resulting from radiative decays of chi(c) states, f(chi) = 0.32 +/- 0.07(stat) +/- 0.07(syst). We discuss the implications of our measurements for charmonium production processes. C1 UNIV ARIZONA,TUCSON,AZ 85721. BOSTON UNIV,BOSTON,MA 02215. BROOKHAVEN NATL LAB,UPTON,NY 11973. BROWN UNIV,PROVIDENCE,RI 02912. UNIV BUENOS AIRES,BUENOS AIRES,DF,ARGENTINA. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV CALIF IRVINE,IRVINE,CA 92717. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521. CTR BRASILEIRO PESQUISAS FIS,LAFEX,RIO JANEIRO,BRAZIL. CTR INVEST & ESTUDIOS AVANZADOS,MEXICO CITY,DF,MEXICO. COLUMBIA UNIV,NEW YORK,NY 10027. UNIV DELHI,DELHI 110007,INDIA. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. FLORIDA STATE UNIV,TALLAHASSEE,FL 32306. UNIV HAWAII,HONOLULU,HI 96822. UNIV ILLINOIS,CHICAGO,IL 60607. INDIANA UNIV,BLOOMINGTON,IN 47405. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. KOREA UNIV,SEOUL 136701,SOUTH KOREA. KYUNGSUNG UNIV,PUSAN,SOUTH KOREA. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV MARYLAND,COLLEGE PK,MD 20742. UNIV MICHIGAN,ANN ARBOR,MI 48109. MICHIGAN STATE UNIV,E LANSING,MI 48824. MOSCOW MV LOMONOSOV STATE UNIV,MOSCOW,RUSSIA. UNIV NEBRASKA,LINCOLN,NE 68588. NYU,NEW YORK,NY 10003. NORTHEASTERN UNIV,BOSTON,MA 02115. NO ILLINOIS UNIV,DE KALB,IL 60115. NORTHWESTERN UNIV,EVANSTON,IL 60208. UNIV NOTRE DAME,NOTRE DAME,IN 46556. UNIV OKLAHOMA,NORMAN,OK 73019. PUNJABI UNIV,CHANDIGARH 160014,INDIA. INST HIGH ENERGY PHYS,PROTVINO 142284,RUSSIA. PURDUE UNIV,W LAFAYETTE,IN 47907. RICE UNIV,HOUSTON,TX 77251. UNIV ESTADUAL RIO DE JANEIRO,RIO JANEIRO,BRAZIL. UNIV ROCHESTER,ROCHESTER,NY 14627. CEA SACLAY,DAPNIA,SERV PHYS PARTICULES,GIF SUR YVETTE,FRANCE. SEOUL NATL UNIV,SEOUL,SOUTH KOREA. SUNY STONY BROOK,STONY BROOK,NY 11794. SSC LAB,DALLAS,TX 75237. TATA INST FUNDAMENTAL RES,BOMBAY 400005,MAHARASHTRA,INDIA. UNIV TEXAS,ARLINGTON,TX 76019. TEXAS A&M UNIV,COLLEGE STN,TX 77843. RP Abachi, S (reprint author), UNIV LOS ANDES,BOGOTA,COLOMBIA. RI Alves, Gilvan/C-4007-2013; Kim, Sun Kee/G-2042-2015; Chekulaev, Sergey/O-1145-2015; de Mello Neto, Joao/C-5822-2013; Sznajder, Andre/L-1621-2016; Aihara, Hiroaki/F-3854-2010; Gutierrez, Phillip/C-1161-2011; Leflat, Alexander/D-7284-2012; Klyukhin, Vyacheslav/D-6850-2012; De, Kaushik/N-1953-2013; Oguri, Vitor/B-5403-2013 OI Kim, Sun Kee/0000-0002-0013-0775; de Mello Neto, Joao/0000-0002-3234-6634; Sznajder, Andre/0000-0001-6998-1108; Aihara, Hiroaki/0000-0002-1907-5964; Klyukhin, Vyacheslav/0000-0002-8577-6531; De, Kaushik/0000-0002-5647-4489; NR 28 TC 110 Z9 110 U1 0 U2 3 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 MAR 7 PY 1996 VL 370 IS 1-2 BP 239 EP 248 DI 10.1016/0370-2693(96)00067-6 PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA UA241 UT WOS:A1996UA24100034 ER PT J AU Peachey, NM Snow, RC Dye, RC AF Peachey, NM Snow, RC Dye, RC TI Composite Pd/Ta metal membranes for hydrogen separation SO JOURNAL OF MEMBRANE SCIENCE LA English DT Article DE composite membranes; gas separations; membrane preparation and structure; metal membranes ID PALLADIUM AB The fabrication of a composite metal membrane using Vapor deposition techniques is reported. Commercially obtained tantalum foils are cleaned by ion milling and subsequently coated with palladium metal. The test foil was 13 mu m tantalum sheet coated with 1 mu m of palladium on each side. For comparison, several other foils of differing tantalum and palladium thicknesses were investigated, These membranes having an area of about 2 cm(2) provide a hydrogen flux ranging from 18.7 standard cubic centimeters per minute (seem) at 300 degrees C to 27.4 seem at 365 degrees C with a hydrogen differential pressure of about 355 torr. The deposited palladium films were oriented along the (111) crystal axis. Gas flux versus pressure measurements revealed that these membranes do not show the p(0.5) dependence upon applied differential pressure expected for foils in which bulk diffusion is rate limiting. This indicates that surface effects are becoming significant in determining hydrogen flux. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 23 TC 88 Z9 88 U1 2 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0376-7388 J9 J MEMBRANE SCI JI J. Membr. Sci. PD MAR 6 PY 1996 VL 111 IS 1 BP 123 EP 133 DI 10.1016/0376-7388(95)00298-7 PG 11 WC Engineering, Chemical; Polymer Science SC Engineering; Polymer Science GA UA232 UT WOS:A1996UA23200013 ER PT J AU Buchanan, AC Britt, PF Thomas, KB Biggs, CA AF Buchanan, AC Britt, PF Thomas, KB Biggs, CA TI Evidence for a radical relay mechanism during reaction of surface-immobilized molecules SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID CHAIN DECOMPOSITION; HYDROGEN-TRANSFER; MODEL COMPOUNDS; RATE CONSTANTS; COAL; THERMOLYSIS; 1,3-DIPHENYLPROPANE; 1,4-DIPHENYLBUTANE; CHEMISTRY; PYROLYSIS AB The impact of restricted mass transport on high-temperature, free-radical reactions has been explored through the use of organic compounds immobilized on silica surfaces by a thermally robust Si-O-C-aromatic linkage. The rate of thermolysis of surface-immobilized 1,3-diphenylpropane (approximate to DPP) at 375 degrees C under vacuum, by a free-radical chain pathway, was found to be very sensitive (factor of 40 variation) to the structure and orientation of a second, neighboring spacer molecule on the surface. Compared with the inert aromatic spacers, (e.g. biphenyl) it was found that spacer molecules containing reactive benzylic C-H bonds (e.g. diphenylmethane) are capable of accelerating the approximate to DPP thermolysis by a process that is unique to diffusionally constrained systems. A mechanism involving rapid serial hydrogen transfer steps on the surface is proposed, which results in radical intermediates being relayed across the surface and, hence, overcoming classical diffusional limitations. RP Buchanan, AC (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,OAK RIDGE,TN 37831, USA. NR 45 TC 25 Z9 25 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD MAR 6 PY 1996 VL 118 IS 9 BP 2182 EP 2189 DI 10.1021/ja953548s PG 8 WC Chemistry, Multidisciplinary SC Chemistry GA TY698 UT WOS:A1996TY69800008 ER PT J AU Bar, G Rubin, S Cutts, RW Taylor, TN Zawodzinski, TA AF Bar, G Rubin, S Cutts, RW Taylor, TN Zawodzinski, TA TI Dendrimer-modified silicon oxide surfaces as platforms for the deposition of gold and silver colloid monolayers: Preparation method, characterization, and correlation between microstructure and optical properties SO LANGMUIR LA English DT Article ID ATOMIC-FORCE MICROSCOPY; LANGMUIR-BLODGETT-FILMS; 2ND-HARMONIC GENERATION; HYDROGEN EVOLUTION; METAL PARTICLES; ENHANCED RAMAN; TIP ARTIFACTS; CATALYSTS; SIZE; PALLADIUM AB We describe a novel approach for Au and Ag colloid monolayer formation on different silicon oxide surfaces such as glass, silicon, and ITO. The preparation method is simple and yields monolayers with easily controlled spacing within the monolayer without aggregation of metal particles. The colloid monolayers are prepared in two steps: (1) modification of the substrates with starburst dendrimers and (2) noble metal colloid deposition onto the dendrimer layer. Different Au and Ag colloids, ranging from 15 to 80 nm in particle diameter, have been deposited onto the dendrimer-modified surfaces. The structure and properties of the resulting particle arrays have been studied by atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, and surface-enhanced Raman scattering(SERS). XPS data show that the dendrimers spontaneously adsorb to various silicon oxide surfaces. The thickness of the dendrimer overlayer has been calculated and lies in the d = 14-25 Angstrom range. SEM and AFM data show that the colloids spontaneously form continuous films on the dendrimer-modified surfaces. The noble metal particles are well isolated and confined to a single layer, and aggregation does not occur on the surface. The interparticle spacing (74-829 nm) and surface coverage can be controlled over a wide range by colloid size, colloid concentration, and immersion time. UV-vis spectroscopic data show that the microstructure directly controls the optical properties of the layer. Finally, we demonstrate that the prepared substrates provide a useful platform for SERS studies of materials adsorbed on the metal particles. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP Bar, G (reprint author), UNIV FREIBURG, FREIBURGER MAT FORSCHUNGSZENTRUM, STEFAN MEIER STR 21, D-79104 FREIBURG, GERMANY. NR 60 TC 124 Z9 126 U1 2 U2 33 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAR 6 PY 1996 VL 12 IS 5 BP 1172 EP 1179 DI 10.1021/la950662f PG 8 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA TZ050 UT WOS:A1996TZ05000011 ER PT J AU Nomikou, Z VanHove, MA Somorjai, GA AF Nomikou, Z VanHove, MA Somorjai, GA TI Molecular modeling of ethylidyne adsorption and diffusion on Pt(111) SO LANGMUIR LA English DT Article ID ORBITAL METHOD; BAND-STRUCTURE; ETHYLENE; HYDROGENATION; SURFACES; GEOMETRIES; FRAGMENTS; PLATINUM AB The adsorption geometry and diffusion behavior of ethylidyne (CCH3) on Pt(111) is studied in order to help elucidate the role of this hydrocarbon species during ethylene hydrogenation and dehydrogenation over Pt catalysts. A variant of the extended Huckel method is used, which allows bond-specific parametrization in molecules. It is adapted to geometrically infinite periodic systems, and empirical parameter values suitable for hydrocarbons on Pt surfaces are developed. The 3-fold fee and hcp hollows are found to be the most stable adsorption sites, with an energy barrier of about 0.11 eV between them. This barrier suggests relatively easy diffusion of ethylidyne along the Pt(111) surface (subject only to steric intermolecular constraints), allowing unimpeded ethylene approach by opening up sites where subsequent hydrogenation reactions could take place with preadsorbed hydrogen. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Van Hove, Michel/A-9862-2008 OI Van Hove, Michel/0000-0002-8898-6921 NR 30 TC 26 Z9 26 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD MAR 6 PY 1996 VL 12 IS 5 BP 1251 EP 1256 DI 10.1021/la9503921 PG 6 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA TZ050 UT WOS:A1996TZ05000023 ER PT J AU Jaishree, TN Ramakrishnan, V White, SW AF Jaishree, TN Ramakrishnan, V White, SW TI Solution structure of prokaryotic ribosomal protein S17 by high-resolution NMR spectroscopy SO BIOCHEMISTRY LA English DT Article ID PULSED-FIELD GRADIENTS; RNA-BINDING DOMAIN; ESCHERICHIA-COLI; 3-DIMENSIONAL STRUCTURE; CRYSTAL-STRUCTURE; LARGER PROTEINS; SPECTRA; RELAXATION; SUBUNITS; SENSITIVITY AB The solution structure of a primary 16S rRNA-binding ribosomal protein, S17, was investigated by two- and three-dimensional homonuclear and heteronuclear magnetic resonance spectroscopy. Almost complete chemical shift assignments for the H-1, N-15, and C-13 resonances have been obtained. The NMR data have been rigorously analyzed using a combination of distance geometry, back-calculation, and simulated annealing refinement techniques, and a high-resolution three-dimensional structure has been deduced. The protein consists of a single twisted antiparallel beta-pleated sheet with Greek-key topology. The five beta-strands are connected by extended loops that are flexible compared to the beta-sheet core structure and appear not to adopt one definite conformation in solution. Two of these loops contain many of the residues that have been implicated in binding ribosomal RNA. The location and distribution of these residues and other positively charged side chains on the protein surface suggest an interaction with two distinct regions of ribosomal RNA. C1 DUKE UNIV,MED CTR,DEPT MICROBIOL,DURHAM,NC 27710. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. OI Ramakrishnan, V/0000-0002-4699-2194 FU NIGMS NIH HHS [GM44973] NR 80 TC 40 Z9 42 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD MAR 5 PY 1996 VL 35 IS 9 BP 2845 EP 2853 DI 10.1021/bi951062i PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA TZ118 UT WOS:A1996TZ11800006 PM 8608120 ER PT J AU Brubaker, MJ Dyer, DH Stoddard, B Koshland, DE AF Brubaker, MJ Dyer, DH Stoddard, B Koshland, DE TI Synthesis, kinetics, and structural studies of a photolabile caged isocitrate: A catalytic trigger for isocitrate dehydrogenase SO BIOCHEMISTRY LA English DT Article ID RESOLVED MACROMOLECULAR CRYSTALLOGRAPHY; NICOTINAMIDE ADENINE-DINUCLEOTIDE; FLASH-PHOTOLYSIS; ACTIVE-SITE; PHOSPHORYLATION; MECHANISM; ENZYME; DIFFRACTION; RESOLUTION; PHOSPHATE AB A biologically inactive photolabile derivative of isocitrate has been synthesized and characterized. The caged isocitrate is photolyzed to isocitrate with a rate constant of 234 s(-1), a half-lift of 3 Ins, and a quantum yield of 0.3 at pH = 6.4, Caged isocitrate (1-(2-nitrophenyl)ethyl 1-hydroxy-1,2-dicarboxy-3-propanecarboxylate) was synthesized in a straightforward synthetic manner stal ting with racemic isocitric acid lactone, Laser pulse photolysis at a wavelength of 355 nm was used to determine the rate of photolysis and the quantum yield and to quantify the :amount of energy needed fur quantitative conversion of the caged isocitrate to free isocitrate, Enzymatic conversion of the liberated isocitrate to alpha-ketoglutarate was achieved in solution as well as in wild-type and mutant isocitrate dehydrogenase (IDH) protein crystals. The X-ray crystal structures of wild-type IDH soaked with photolabile caged isocitrate and Mg2+ and void of nicotinamide adenine dinucleotide phosphate were solved at 2.5 Angstrom resolution before and after photolysis and compared by difference mapping against previously determined enzyme structures, Prior to photolysis the enzyme active site contains a low occupancy of bound free Mg2+ in the metal binding site but no observable bound isocitrate, whereas after photolysis the enzyme is complexed to liberated isocitrate and Mg2+ with binding interactions identical to those of previously determined substrate complexes. Single-crystal spectroscopy of the crystals after flash photolysis in the presence of substrates shows production of bound enzyme-substrate complexes and reduced nicotinamide adenine dinucleotide phosphate induced by the photolytic event. C1 UNIV CALIF BERKELEY, DEPT MOLEC & CELL BIOL, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR ADV MAT, BERKELEY, CA 94720 USA. UNIV WASHINGTON, FRED HUTCHINSON CANC RES CTR, DIV BASIC SCI, PROGRAM STRUCT BIOL, SEATTLE, WA 98104 USA. FU NIGMS NIH HHS [R01-GM49857] NR 31 TC 16 Z9 17 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD MAR 5 PY 1996 VL 35 IS 9 BP 2854 EP 2864 DI 10.1021/bi951105v PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA TZ118 UT WOS:A1996TZ11800007 PM 8608121 ER PT J AU Chen, JB Young, VG Angelici, RJ AF Chen, JB Young, VG Angelici, RJ TI Reactions of the iridathiabenzene complex Cp*Ir(2,5-dimethylthiophene) with Co-2(CO)(8), Co-4(CO)(12), and (eta(6)-C(6)H(3)Me(3))Co-4(CO)(9) SO ORGANOMETALLICS LA English DT Article ID 3 METAL CENTERS; THIOPHENE COORDINATION; 2,5-DIMETHYLTHIOPHENE COORDINATION; IRON CARBONYLS; CP-STAR-IR(2,5-DIMETHYLTHIOPHENE) AB With the goal of preparing an eta(6)-iridathiabenzene complex of CO4(CO)(12), the ring-opened iridathiabenzene complex Cp*Ir(C,S-2,5-Me(2)T) (1), where 2,5-Me(2)T is 2,5-dimethylthiophene, was reacted with Co-4(CO)(12), Co-2(CO)(8), and (eta(6)-C(6)H(3)Me(3))Co-4(CO)(9). Only in the reaction of (eta(6)-C(6)H(3)Me(3))CO4(CO)(9) under mild conditions (35-40 degrees C) was the eta(6)-iridathiabenzene cluster [eta(6)-Cp*Ir(C,S-2,5-Me(2)T)] Co-4(CO)(9) (7) obtained. At higher temperatures, the reaction yielded Cp*Ir(eta(4)2,5-Me(2)T . Co-4(CO)(11)) (6), in which the 2,5-Me(2)T ligand is coordinated through its diene to the Ir and through its sulfur to a Co of the cluster. Reactions of Co-4(CO)(12) and Co-2(CO)(8) with 1 yielded Cp*Ir(eta(4)-2,5-Me(2)T . Co-4(CO)(11)) (2), an isomer of 6, which converts to the desulfurized linear tetranuclear cluster [Cp*Ir(C(Me)=CHCH-C(Me))(mu-CO)(2)Co](2) (3); this species contains bridging iridacyclopentadiene units. Cluster 3 has a structure with a Co-2(mu-CO)(2) core and Cp*Ir(C(Me)=CHCH=C(Me))(CO) (4) end groups. In fact, 3 can be prepared from Co-2(CO)(8) and 4. Molecular structures of 2-4 are reported, together with a discussion of pathways that lead to their formation. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. CHINESE ACAD SCI,SHANGHAI INST ORGAN CHEM,SHANGHAI 200032,PEOPLES R CHINA. NR 31 TC 15 Z9 15 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD MAR 5 PY 1996 VL 15 IS 5 BP 1414 EP 1421 DI 10.1021/om950702a PG 8 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA TY931 UT WOS:A1996TY93100014 ER PT J AU Schwartz, DJ Smith, MR Andersen, RA AF Schwartz, DJ Smith, MR Andersen, RA TI Synthesis and properties of the titanaoxacyclobutane derived from (Me(5)C(5))(2)Ti(O)(L) and allene SO ORGANOMETALLICS LA English DT Article ID OXYGEN-ATOM TRANSFER; X-RAY STRUCTURE; TRAPPING REACTIONS; ORGANIC-MOLECULES; NITROUS-OXIDE; DECOMPOSITION; INSERTION; OLEFIN; BONDS; OXAMETALLACYCLOBUTANES AB The oxo compound (C(5)Me(5))(2)TiO(pyr) (1) undergoes a 2 + 2 cycloaddition reaction with allene to give (Me(5)C(5))(2)Ti[OC(CH2)CH2] (2), which contains a puckered TiOC2 ring in the solid state. The metallacyclobutane 2 does not exchange with either free allene or pyridine on the NMR time scale and slowly converts to the ring-metalated product (C(5)Me(5))(C(5)Me(4)-CH2)Ti[OC(CH2)Me] (3) in solution and to the enolate complex (C(5)Me(5))(2)Ti[H][OC(CH2)Me] (4) in the presence of 1 atm of H-2. C1 UNIV CALIF BERKELEY,DEPT CHEM,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DIV CHEM SCI,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RI Smith, Milton/M-3511-2016 OI Smith, Milton/0000-0002-8036-4503 NR 38 TC 27 Z9 27 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD MAR 5 PY 1996 VL 15 IS 5 BP 1446 EP 1450 DI 10.1021/om950634s PG 5 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA TY931 UT WOS:A1996TY93100019 ER PT J AU Butcher, RJ Clark, DL Grumbine, SK Scott, BL Watkin, JG AF Butcher, RJ Clark, DL Grumbine, SK Scott, BL Watkin, JG TI Mono(pentamethylcyclopentadienyl)thorium chemistry: Synthesis, structural characterization, and reactivity of aryloxide and alkyl derivatives SO ORGANOMETALLICS LA English DT Article ID X-RAY CRYSTAL; ORGANOACTINIDE COORDINATIVE UNSATURATION; ACTINIDE ALKOXIDE CHEMISTRY; CARBON-MONOXIDE ACTIVATION; OXYGEN-DONOR COMPLEXES; LEWIS BASE ADDUCTS; F-BLOCK METALS; CYCLOMETALATION CHEMISTRY; MOLECULAR-STRUCTURE; HYDROGEN BONDS AB Reaction of ThBr4(THF)(4) with 1 equiv of Cp*MgBr(THF) (Cp* = eta-C(5)Me(5)) produces the mono(pentamethylcyclopentadienyl) complex Cp*ThBr3(THF)(3) (1). Treatment of 1 with 1 or 2 equiv of KOAr (Ar = 2,6-t-Bu(2)C(6)H(3)) yields the mono- and bis(aryloxide) species Cp*ThBr2(OAr)(THF) (2) and Cp*ThBr(OAr)(2) (3), respectively, Alkylation of 2 with 2 equiv of Me(3)SiCH(2)MgCl leads to isolation of the bis(alkyl) complex Cp*Th(OAr)(CH(2)SiMe(3))(2) (4), while 3 reacts with 1 equiv of MeMgBr to form the mono(alkyl) derivative Cp*ThMe(OAr)2 (5). 4 reacts with dihydrogen to produce the trimeric thorium dihydride [Cp*ThH2(OAr)](3) (6), while thermolysis of 4 in the presence of triphenylphosphine oxide leads to the isolation of the metallacyclic species Cp*Th(OC6H3-t-BuCMe(2)CH(2))(OAr)(O=PPh(3)) (7). In the presence of 1 equiv of [HNMe(2)Ph][B(C6F5)(4)], 4 is found to catalyze the hydrogenation of l-hexene and also the polymerization of ethylene. Compounds 1-7 have been characterized by H-1 NMR and IR spectroscopy, by microanalysis, and, in the case of 3, 4, and 7, by single-crystal X-ray diffraction studies. Cp*ThBr(OAr)(2)(3) exhibits a somewhat distorted three-legged piano-stool geometry with Th-Cp*(centroid), Th-O, and Th-Br distances of 2.57(1), 2.16(1) (av), and 2.821(2) Angstrom, respectively. Cp*Th(OAr)(CH(2)SiMe(3))(2) (4) also displays a three-legged piano-stool geometry with Th-C distances to the alkyl groups of 2.460(9) and 2.488(12) Angstrom. Th-Cp*(centroid) and Th-O distances are very similar to those found in 3, at 2.53(1) and 2.186(6) Angstrom, respectively. Cp*Th(OC6H3-t-BuCMe(2)CH(2))(OAr)(O = PPh(3)) (7) features a distorted trigonal bipyramidal geometry about the metal center, with the Cp* ligand and the oxygen atom of the cyclometalated aryloxide ligand occupying axial sites (Cp*(centroid)-Th-O = 168.3(3)degrees). The Th-C distance to the tert-butyl methylene group is 2.521(12) Angstrom, while Th-O distances to the aryloxide and triphenylphosphine oxide ligands are 2.199(7) (av) and 2.445(7) Angstrom, respectively. C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. RI Clark, David/A-9729-2011; Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 80 TC 21 Z9 21 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0276-7333 J9 ORGANOMETALLICS JI Organometallics PD MAR 5 PY 1996 VL 15 IS 5 BP 1488 EP 1496 DI 10.1021/om9508694 PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA TY931 UT WOS:A1996TY93100025 ER PT J AU Yang, XG McBranch, D Swanson, B Li, DQ AF Yang, XG McBranch, D Swanson, B Li, DQ TI Synthesis and NLO properties of polar self-assemblies of molecular pyramids covalently bound on oxide surfaces SO ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH LA English DT Article DE calixarenes; monolayers; NLO materials; nonlinear optics ID MULTILAYERS; ORIENTATION C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545. NR 17 TC 44 Z9 44 U1 1 U2 5 PU VCH PUBLISHERS INC PI DEERFIELD BEACH PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788 SN 0570-0833 J9 ANGEW CHEM INT EDIT JI Angew. Chem.-Int. Edit. Engl. PD MAR 4 PY 1996 VL 35 IS 5 BP 538 EP 540 DI 10.1002/anie.199605381 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA UB214 UT WOS:A1996UB21400014 ER PT J AU Kurtz, SR Biefeld, RM Allerman, AA Howard, AJ Crawford, MH Pelczynski, MW AF Kurtz, SR Biefeld, RM Allerman, AA Howard, AJ Crawford, MH Pelczynski, MW TI Pseudomorphic InAsSb multiple quantum well injection laser emitting at 3.5 mu m SO APPLIED PHYSICS LETTERS LA English DT Article AB A pseudomorphic, compressively strained InAs0.94Sb0.06 multiple quantum well injection laser, emitting in the 3.5-3.6 mu m range is reported. The device was grown by metalorganic chemical vapor deposition, and x-ray and optical characterization indicate that the active region has a very low dislocation density. in pulsed mode, the laser operated at 135 K and displayed a characteristic temperature of 33 K, equaling the highest value reported for molecular-beam epitaxy grown, InAsSb/InAlAsSb active region lasers of comparable wavelength. Factors limiting the performance of these lasers are discussed. (C) 1996 American Institute of Physics. RP Kurtz, SR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 15 TC 44 Z9 44 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 4 PY 1996 VL 68 IS 10 BP 1332 EP 1334 DI 10.1063/1.115925 PG 3 WC Physics, Applied SC Physics GA TX861 UT WOS:A1996TX86100008 ER PT J AU Brundermann, E Linhart, AM Roser, HP Dubon, OD Hansen, WL Haller, EE AF Brundermann, E Linhart, AM Roser, HP Dubon, OD Hansen, WL Haller, EE TI Miniaturization of p-Ge lasers: Progress toward continuous wave operation SO APPLIED PHYSICS LETTERS LA English DT Article ID FAR-INFRARED LASER; STIMULATED-EMISSION; MAGNETIC-FIELDS AB We have observed intervalence band laser action in Al-doped germanium crystals with volumes as small as 0.03 cm(3), one order of magnitude smaller than previously studied p-Ge laser crystals. A duty cycle of 1.5X10(-4) was achieved. We show evidence that crystal heating plays a key role in the duration of the emission pulse and have measured a maximum pulse length of 11 mu s for a 0.43 cm(3) Ga-doped germanium crystal. Such progress in the understanding and performance of p-Ge hot hole lasers marks a significant step toward continuous wave operation. C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP Brundermann, E (reprint author), DLR,INST SPACE SENSOR TECHNOL,D-12489 BERLIN,GERMANY. RI Bruendermann, Erik/J-7186-2016 OI Bruendermann, Erik/0000-0003-4119-3489 NR 14 TC 21 Z9 21 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD MAR 4 PY 1996 VL 68 IS 10 BP 1359 EP 1361 PG 3 WC Physics, Applied SC Physics GA TX861 UT WOS:A1996TX86100017 ER PT J AU Weston, RE AF Weston, RE TI Pegram lectures SO CHEMICAL & ENGINEERING NEWS LA English DT Letter RP Weston, RE (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0009-2347 J9 CHEM ENG NEWS JI Chem. Eng. News PD MAR 4 PY 1996 VL 74 IS 10 BP 41 EP & PG 2 WC Chemistry, Multidisciplinary; Engineering, Chemical SC Chemistry; Engineering GA TY382 UT WOS:A1996TY38200021 ER PT J AU Veil, JA Burke, CJ Moses, DO AF Veil, JA Burke, CJ Moses, DO TI Synthetic-based muds can improve drilling efficiency without polluting SO OIL & GAS JOURNAL LA English DT Article C1 US DOE,WASHINGTON,DC 20545. RP Veil, JA (reprint author), ARGONNE NATL LAB,WASHINGTON,DC, USA. NR 17 TC 0 Z9 1 U1 0 U2 0 PU PENNWELL PUBL CO ENERGY GROUP PI TULSA PA 1421 S SHERIDAN RD PO BOX 1260, TULSA, OK 74101 SN 0030-1388 J9 OIL GAS J JI Oil Gas J. PD MAR 4 PY 1996 VL 94 IS 10 BP 49 EP 54 PG 6 WC Energy & Fuels; Engineering, Petroleum SC Energy & Fuels; Engineering GA TZ937 UT WOS:A1996TZ93700017 ER PT J AU Khoo, TL Carpenter, MP Lauritsen, T Ackermann, D Ahmad, I Blumenthal, DJ Fischer, SM Janssens, RVF Nisius, D Moore, EF LopezMartens, A Dossing, T Kruecken, R Asztalos, SJ Becker, JA Bernstein, L Clark, RM Deleplanque, MA Diamond, RM Fallon, P Farris, LP Hannachi, F Henry, EA Korichi, A Lee, IY Macchiavelli, AO Stephens, FS AF Khoo, TL Carpenter, MP Lauritsen, T Ackermann, D Ahmad, I Blumenthal, DJ Fischer, SM Janssens, RVF Nisius, D Moore, EF LopezMartens, A Dossing, T Kruecken, R Asztalos, SJ Becker, JA Bernstein, L Clark, RM Deleplanque, MA Diamond, RM Fallon, P Farris, LP Hannachi, F Henry, EA Korichi, A Lee, IY Macchiavelli, AO Stephens, FS TI Excitation energies and spins of a superdeformed band in Hg-194 from one-step discrete decays to the yrast line SO PHYSICAL REVIEW LETTERS LA English DT Article ID NUCLEI; STATES AB Discrete gamma rays directly connecting states of a superdeformed (SD) band in Hg-194 to the yrast states have been discovered. Thus, the excitation energies and spins of all members of the lowest SD band are established for the first time, together with their likely parity. The SD band decays from its 10(+) and 12(+) states, which lie 4204.8 and 4407.4 keV above the normal-deformed yrast states of the same spins. C1 N CAROLINA STATE UNIV,RALEIGH,NC 27695. TRIANGLE UNIV NUCL LAB,DURHAM,NC 27708. CNRS,IN2P3,CTR SPECTROMETRIE NUCL & SPECTROMETRIE MASSE,F-91405 ORSAY,FRANCE. NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CNRS,IN2P3,INST PHYS NUCL,F-9140 ORSAY,FRANCE. RP Khoo, TL (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. RI Carpenter, Michael/E-4287-2015; Kruecken, Reiner/A-1640-2013 OI Carpenter, Michael/0000-0002-3237-5734; Kruecken, Reiner/0000-0002-2755-8042 NR 31 TC 145 Z9 145 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 4 PY 1996 VL 76 IS 10 BP 1583 EP 1586 DI 10.1103/PhysRevLett.76.1583 PG 4 WC Physics, Multidisciplinary SC Physics GA TX696 UT WOS:A1996TX69600007 ER PT J AU Brizard, AJ Kaufman, AN AF Brizard, AJ Kaufman, AN TI How a wave flips its energy sign by linear conversion SO PHYSICAL REVIEW LETTERS LA English DT Article ID JET AB An inverted population of energetic minority ions, such as neonatal fusion alphas, can support a negative-energy Bernstein wave (whose frequency is a harmonic of their gyrofrequency). As a result of the magnetic-field nonuniformity and the population inversion, the wave crosses the gyroresonance layer and its energy flips sign. This results in energy transfer to a gyroballistic mode (which exists only in the resonance layer), with a conversion coefficient exactly equal to 2. RP Brizard, AJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. OI Brizard, Alain/0000-0002-0192-6273 NR 3 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 4 PY 1996 VL 76 IS 10 BP 1639 EP 1642 DI 10.1103/PhysRevLett.76.1639 PG 4 WC Physics, Multidisciplinary SC Physics GA TX696 UT WOS:A1996TX69600021 ER PT J AU Bulaevskii, LN Pokrovsky, VL Maley, MP AF Bulaevskii, LN Pokrovsky, VL Maley, MP TI Field dependence of c-axis plasma resonance in Josephson-coupled superconductors SO PHYSICAL REVIEW LETTERS LA English DT Article ID VORTEX STATE; PHASE; SYSTEMS AB The field and temperature dependence of the c-axis plasma frequency in Josephson-coupled layered superconductors is considered. In the zero-temperature limit the field dependence is expressed via the correlator of pancake density between adjacent layers. In the case of strong pinning, when ordering of pancakes along the c axis is destroyed, the predicted power-law field dependence is found to be in agreement with the experimental data for Bi2Sr2CaCU2O8+delta. For weaker pinning, the field dependence is different. Thus information on the pancake arrangement in the vortex glass phase can be obtained from plasma frequency measurements. C1 TEXAS A&M UNIV,DEPT PHYS,COLLEGE STN,TX 77843. LD LANDAU THEORET PHYS INST,MOSCOW 117940,RUSSIA. RP Bulaevskii, LN (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 26 TC 79 Z9 79 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 4 PY 1996 VL 76 IS 10 BP 1719 EP 1722 DI 10.1103/PhysRevLett.76.1719 PG 4 WC Physics, Multidisciplinary SC Physics GA TX696 UT WOS:A1996TX69600041 ER PT J AU Carlisle, JA Shirley, EL Hudson, EA Terminello, LJ Callcott, TA Jia, JJ Ederer, DL Perera, RCC Himpsel, FJ AF Carlisle, JA Shirley, EL Hudson, EA Terminello, LJ Callcott, TA Jia, JJ Ederer, DL Perera, RCC Himpsel, FJ TI Core Hole effects in resonant inelastic x-ray scattering of graphite - Reply SO PHYSICAL REVIEW LETTERS LA English DT Article C1 NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. UNIV TENNESSEE,KNOXVILLE,TN 37966. TULANE UNIV,NEW ORLEANS,LA 70118. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. IBM CORP,THOMAS J WATSON RES CTR,DIV RES,YORKTOWN HTS,NY 10598. RP Carlisle, JA (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 6 TC 12 Z9 12 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD MAR 4 PY 1996 VL 76 IS 10 BP 1762 EP 1762 DI 10.1103/PhysRevLett.76.1762 PG 1 WC Physics, Multidisciplinary SC Physics GA TX696 UT WOS:A1996TX69600054 ER PT J AU Xue, QF Yeung, ES AF Xue, QF Yeung, ES TI Determination of lactate dehydrogenase isoenzymes in single lymphocytes from normal and leukemia cell lines SO JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES LA English DT Article DE lactate dehydrogenase; enzymes; isoenzymes ID CAPILLARY ELECTROPHORESIS; QUANTITATIVE-DETERMINATION; FLUORESCENCE DETECTION; CANCER; DOPAMINE AB This work demonstrates that our previously developed technique for single-erythrocyte analysis by capillary electrophoresis with laser-induced fluorescence detection (CE-LIF) can be applied to study individual lymphocytes, with some modification in the cell lysing procedure. A tesla coil was shown to be capable of lysing the lymphocyte cells inside the capillary. The electromagnetic field induced by the tesla coil was believed to be responsible for breaking the cell membrane. The lactate dehydrogenase (LDH) isoenzyme activities and the relative ratios between different LDH isoenzymes were measured for normal lymphocytes as well as B-type and T-type acute lymphoblastic leukemia cells. Both the LDH activity and the isoenzyme ratios show large variations among individual cells. The former is expected due to variations in cell size. The latter implies that single-cell measurements are less useful than the average values over a cell population as markers for leukemia. C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, USDOE, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. NR 32 TC 50 Z9 54 U1 1 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1570-0232 J9 J CHROMATOGR B JI J. Chromatogr. B PD MAR 3 PY 1996 VL 677 IS 2 BP 233 EP 240 DI 10.1016/0378-4347(95)00467-X PG 8 WC Biochemical Research Methods; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA UE061 UT WOS:A1996UE06100004 PM 8704926 ER PT J AU Freund, RW Nachtigal, NM AF Freund, RW Nachtigal, NM TI QMRPACK: A package of QMR algorithms SO ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE LA English DT Article DE algorithms; reliability; theory; coupled two-term recurrences; eigenvalues; iterative method; Krylov subspace; Lanczos method; look-ahead; linear systems; non-Hermitian matrices; quasiminimal residual property; three-term recurrences; transfer functions ID HERMITIAN LINEAR-SYSTEMS; AHEAD LANCZOS-ALGORITHM; MATRICES; IMPLEMENTATION AB The quasi-minimal residual (QMR) algorithm is a Krylov-subspace method for the iterative solution of large non-Hermitian linear systems. QMR is based on the look-ahead Lanczos algorithm that, by itself, can also be used to obtain approximate eigenvalues of large non-Hermitian matrices. QMRPACK is a software package with Fortran 77 implementations of the QMR algorithm and variants thereof, and of the three-term and coupled two-term look-ahead Lanczos algorithms. In this article, we discuss some of the features of the algorithms in the package, with emphasis on the issues related to using the codes. We describe in some detail two routines from the package, one for the solution of linear systems and the other for the computation of eigenvalue approximations. We present some numerical examples from applications where QMRPACK was used. C1 OAK RIDGE NATL LAB, MATH SCI SECT, OAK RIDGE, TN 37831 USA. RP Freund, RW (reprint author), AT&T BELL LABS, 600 MT AVE, ROOM 2C-420, MURRAY HILL, NJ 07974 USA. NR 32 TC 42 Z9 42 U1 0 U2 0 PU ASSOC COMPUTING MACHINERY PI NEW YORK PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA SN 0098-3500 J9 ACM T MATH SOFTWARE JI ACM Trans. Math. Softw. PD MAR PY 1996 VL 22 IS 1 BP 46 EP 77 DI 10.1145/225545.225551 PG 32 WC Computer Science, Software Engineering; Mathematics, Applied SC Computer Science; Mathematics GA UD403 UT WOS:A1996UD40300006 ER PT J AU Hill, JP McMorrow, DF AF Hill, JP McMorrow, DF TI X-ray resonant exchange scattering: Polarization dependence and correlation functions SO ACTA CRYSTALLOGRAPHICA SECTION A LA English DT Article ID MAGNETIC SCATTERING; DIFFRACTION; DICHROISM; HOLMIUM AB The cross section for X-ray resonant exchange scattering is reformulated in terms of linear polarization states perpendicular and parallel to the scattering plane, a basis particularly well suited to synchrotron X-ray diffraction experiments. The explicit polarization dependence of the terms is calculated for the electric dipole and quadrupole contributions. This expression, in turn, is rewritten in an orthonormal basis to highlight the dependence of the cross section on each component of the magnetic moment. This has the benefit of providing an empirically useful expression for the cross section. Diffraction patterns from a few simple magnetic structures are calculated Finally, the correlation function measured at each resonant harmonic is derived. C1 RISO NATL LAB,DEPT SOLID STATE PHYS,DK-4000 ROSKILDE,DENMARK. RP Hill, JP (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI McMorrow, Desmond/C-2655-2008; Hill, John/F-6549-2011 OI McMorrow, Desmond/0000-0002-4947-7788; NR 31 TC 259 Z9 259 U1 3 U2 25 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-7673 J9 ACTA CRYSTALLOGR A JI Acta Crystallogr. Sect. A PD MAR 1 PY 1996 VL 52 BP 236 EP 244 DI 10.1107/S0108767395012670 PN 2 PG 9 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA UD232 UT WOS:A1996UD23200013 ER PT J AU Harp, JM Uberbacher, EC Roberson, AE Palmer, EL Gewiess, A Bunick, GJ AF Harp, JM Uberbacher, EC Roberson, AE Palmer, EL Gewiess, A Bunick, GJ TI X-ray diffraction analysis of crystals containing twofold symmetric nucleosome core particles SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID HISTONE OCTAMER; DNA; RESOLUTION; DEOXYRIBONUCLEASE; SUPERHELIX AB Nucleosome core particles containing a DNA palindrome and purified chicken erythrocyte histone octamer have been reconstituted and crystallized. The dyad symmetry of the palindrome extends the dyad symmetry of the histone octamer to result in a twofold symmetric particle. This ensures that the structure determined by X-ray diffraction will yield a true representation of the DNA strand rather than the twofold averaged structure which would result from using a non-palindromic DNA sequence. The crystals provide isotropic diffraction to 3.2 Angstrom with observed reflections extending to d spacings of about 2.8 Angstrom using a rotating-anode CuK alpha X-ray source. Although the DNA palindrome is a factor contributing to the quality of the diffraction data, another significant factor is an improved preparative technique which enriches for correctly phased nucleosome core particles. C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. RP Harp, JM (reprint author), UNIV TENNESSEE,GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831, USA. NR 24 TC 26 Z9 27 U1 0 U2 5 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAR 1 PY 1996 VL 52 BP 283 EP 288 DI 10.1107/S0907444995009139 PN 2 PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA UF186 UT WOS:A1996UF18600006 PM 15299701 ER PT J AU Rupp, B Marshak, DR Parkin, S AF Rupp, B Marshak, DR Parkin, S TI Crystallization and preliminary X-ray analysis of two new crystal forms of calmodulin SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY LA English DT Article ID RESOLUTION; DIFFRACTION AB Two new crystal forms of calmodulin from Gallus gallus are reported. Crystals in space group P1 (cell dimensions a = 59.7, b = 53.1, c = 24.6 Angstrom, alpha = 93.2, beta = 96.7, gamma = 89.2 degrees and Z = 2), grow as long thin needles. Water content on density considerations is similar to 50%. They diffract to similar to 2.0 Angstrom, but give wide multiply peaked spot profiles. Crystals in space group P2(1)2(1)2(1) (cell dimensions a = 32.2, b = 56.0, c = 67.3 Angstrom and Z = 4), grow as clusters of thin tablets and contain similar to 30% water by volume. These small crystals (similar to 0.4 x 0.15 x 0.1 mm) diffracted well to similar to 1.4 Angstrom and some appreciable intensities were observed at resolutions better than 1.2 Angstrom. C1 COLD SPRING HARBOR LAB,COLD SPRING HARBOR,NY 11724. RP Rupp, B (reprint author), LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL PROGRAM,POB 808,LIVERMORE,CA 94551, USA. RI Parkin, Sean/E-7044-2011 NR 14 TC 16 Z9 16 U1 0 U2 2 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0907-4449 J9 ACTA CRYSTALLOGR D JI Acta Crystallogr. Sect. D-Biol. Crystallogr. PD MAR 1 PY 1996 VL 52 BP 411 EP 413 DI 10.1107/S0907444995011826 PN 2 PG 3 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Biophysics; Crystallography SC Biochemistry & Molecular Biology; Biophysics; Crystallography GA UF186 UT WOS:A1996UF18600020 PM 15299715 ER PT J AU Wang, JN AF Wang, JN TI Microphysical model of Harper-Dorn creep SO ACTA MATERIALIA LA English DT Article ID SELF-DIFFUSION; SINGLE-CRYSTALS; VISCOUS CREEP; LOW STRESSES; NASI-CAAL; OXYGEN; INTERDIFFUSION; ZIRCONIUM; TITANIUM; QUARTZ AB Using experimental data for Harper-Dorn creep in different materials, it is demonstrated that the flow process in this creep may be dislocation glide plus climb with the climb being rate-controlling under a constant dislocation density determined by the magnitude of the Peierls stress. A rate equation is presented which may be used to predict the occurrence of Harper-Dorn creep in any crystalline material. RP LAWRENCE LIVERMORE NATL LAB, L-370, LIVERMORE, CA 94551 USA. NR 64 TC 30 Z9 30 U1 0 U2 1 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 MAR PY 1996 VL 44 IS 3 BP 855 EP 862 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA TY883 UT WOS:A1996TY88300002 ER PT J AU Huang, Y Liu, C Stout, MG AF Huang, Y Liu, C Stout, MG TI A Brazilian disk for measuring fracture toughness of orthotropic materials SO ACTA MATERIALIA LA English DT Article ID MODE FRACTURE; COMPOSITES; SPECIMENS; STRENGTH AB A Brazilian disk test specimen is calibrated for the determination of the mixed-mode fracture toughness of orthotropic materials. The specimen is well-suited for investigating the fracture toughness of orthotropic materials over the complete range of mode mixtures, 0-90 degrees. The K dominance zone around the crack tip exists and can be as large as a/5 for the Brazilian disk, provided that the zone of nonlinear effects is small (a is the half-crack length). The rationale for determining the stress intensity factors under mixed-mode loading conditions and the calibration curves, relevant to a number of orthotropic materials, relating maximum load and loading angle to K-I and K-II are presented. C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP Huang, Y (reprint author), MICHIGAN TECHNOL UNIV,DEPT MECH ENGN ENGN MECH,HOUGHTON,MI 49931, USA. RI Huang, Yonggang/B-6998-2009 NR 19 TC 11 Z9 12 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 1359-6454 J9 ACTA MATER JI Acta Mater. PD MAR PY 1996 VL 44 IS 3 BP 1223 EP 1232 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA TY883 UT WOS:A1996TY88300035 ER PT J AU Sugama, T Carciello, N AF Sugama, T Carciello, N TI Sodium metasilicate-modified lightweight high alumina cements for use as geothermal well-cementing materials SO ADVANCED CEMENT BASED MATERIALS LA English DT Article DE geothermal cement; high alumina cement; lightweight slurry; microsphere; sodium metasilicate AB In studying the use of sodium metasilicate (SMS)-modified high alumina cements containing mullite-shelled microspheres as light-weight geothermal cementitious materials, we found that the following were the most advantageous characteristics of the slurries and of the 200 and 300 degrees C autoclaved cements: (1) the slurries have a low density of <1.25 g/cc, (2) the incorporation of SMS retarded the setting of the cements, (3) sodium calcium silicate hydrate and boehmite were formed in the matrix phase by hydrothermal reactions between the cement and SMS, and (4) there was a favorable reaction between the mullite shell layer in the hollow microspheres and the SMS to form analcime and boehmite phases. For characteristics (3) and (4), the pronounced development of these phases at 300 degrees C generated a dense microstructure in the cements and was reflected on a reduced water permeability and a low rate of porosity. RP Sugama, T (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,ENERGY EFFICIENCY & CONSERVAT DIV,UPTON,NY 11973, USA. NR 8 TC 7 Z9 7 U1 1 U2 7 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1065-7355 J9 ADV CEM BASED MATER JI Adv. Cem. Based Mater. PD MAR PY 1996 VL 3 IS 2 BP 45 EP 53 DI 10.1016/S1065-7355(96)90071-1 PG 9 WC Construction & Building Technology; Materials Science, Multidisciplinary SC Construction & Building Technology; Materials Science GA TX520 UT WOS:A1996TX52000001 ER PT J AU Rotter, JI Bu, XD Cantor, RM Warden, CH Brown, J Gray, RJ Blanche, PJ Krauss, RM Lusis, AJ AF Rotter, JI Bu, XD Cantor, RM Warden, CH Brown, J Gray, RJ Blanche, PJ Krauss, RM Lusis, AJ TI Multilocus genetic determinants of LDL particle size in coronary artery disease families SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Article ID LOW-DENSITY-LIPOPROTEIN; POLYMERASE CHAIN-REACTION; APOLIPOPROTEIN-B; COMBINED HYPERLIPIDEMIA; SUBCLASS PHENOTYPES; HEART-DISEASE; REPEAT POLYMORPHISM; QUANTITATIVE TRAIT; INSULIN-RESISTANCE; LINKAGE ANALYSIS AB Recent interest in atherosclerosis has focused on the genetic determinants of low-density lipoprotein (LDL) particle size, because of (i) the association of small dense LDL particles with a three-fold increased risk for coronary artery disease (CAD) and (ii) the recent report of linkage of the trait to the LDL receptor (chromosome 19). By utilizing nonparametric quantitative sib-pair and relative-pair-analysis methods in CAD families, we tested for linkage of a gene or genes controlling LDL particle sizes with the genetic loci for the major apolipoproteins and enzymes participating in lipoprotein metabolism. We confirmed evidence for linkage to the LDL receptor locus (P = .008). For six candidate gene loci, including apolipoprotein(apo)B, apoAII, apo(a), apoE-CI-CII, lipoprotein lipase, and high-density lipoprotein-binding protein, no evidence for linkage was observed by sib-pair linkage analyses (P values ranged from .24 to .81). However, in addition, we did find tentative evidence for linkage with the apoAI-CIII-AIV locus (chromosome 11) (P = .06) and significant evidence for linkage of the cholesteryl ester transfer protein locus (chromosome 16) (P = .01) and the manganese superoxide dismutase locus (chromosome 6) (P = .001), thus indicating multilocus determination of this atherogenic trait. C1 CEDARS SINAI MED CTR, DIV MED GENET, DEPT PEDIAT, LOS ANGELES, CA 90048 USA. CEDARS SINAI MED CTR, DIV CARDIOL, DEPT PEDIAT, LOS ANGELES, CA 90048 USA. CEDARS SINAI MED CTR, DIV CARDIOL, DEPT MED, LOS ANGELES, CA 90048 USA. UNIV CALIF LOS ANGELES, DEPT MED, LOS ANGELES, CA 90024 USA. UNIV CALIF LOS ANGELES, DEPT MICROBIOL, LOS ANGELES, CA 90024 USA. UNIV CALIF LOS ANGELES, DEPT MOLEC GENET, LOS ANGELES, CA 90024 USA. UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV LIFE SCI, BERKELEY, CA USA. RP Rotter, JI (reprint author), CEDARS SINAI MED CTR, DIV MED GENET, DEPT MED, SSB-3, 8700 BEVERELY BLVD, LOS ANGELES, CA 90048 USA. FU NHLBI NIH HHS [HL18574, HL28481] NR 74 TC 77 Z9 78 U1 0 U2 1 PU CELL PRESS PI CAMBRIDGE PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA SN 0002-9297 EI 1537-6605 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD MAR PY 1996 VL 58 IS 3 BP 585 EP 594 PG 10 WC Genetics & Heredity SC Genetics & Heredity GA TV564 UT WOS:A1996TV56400017 PM 8644718 ER PT J AU PaganiniHill, A Dworsky, R Krauss, RM AF PaganiniHill, A Dworsky, R Krauss, RM TI Hormone replacement therapy, hormone levels, and lipoprotein cholesterol concentrations in elderly women SO AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY LA English DT Article DE estrogen; progestin; lipoproteins; cholesterol; triglycerides; hormone replacement therapy ID POSTMENOPAUSAL ESTROGEN USE; APOLIPOPROTEIN-A-I; MENOPAUSAL WOMEN; HEART-DISEASE; SUBFRACTIONS; PROGESTOGENS; LIPIDS; 1980S AB OBJECTIVE: Our purpose was to assess the relationships of lipid and lipoprotein cholesterol levels to hormone replacement therapy and hormone levels in elderly women. STUDY DESIGN: A sample of 292 postmenopausal women 55 to 99 years old (mean 76 years) was drawn from Leisure World Laguna Hills, California, an upper-middle-class, white independent-living population. We compared 84 women receiving unopposed estrogen replacement therapy and 38 women taking combination hormone replacement therapy with 170 women who had never used hormone replacement therapy. Nonparametric tests for differences in lipid and lipoprotein cholesterol levels among groups and multiple stepwise regression models were used. RESULTS: Estrogen users (with and without progestin) had lower total and low-density lipoprotein cholesterol and higher high-density lipoprotein and high-density lipoprotein subfraction types 2, 2a, and 2b cholesterol levels. High-density lipoprotein type 3 subfractions were lower in combination hormone replacement therapy users but higher in unopposed estrogen users relative to nonusers. The conjugated equine estrogen dose was negatively correlated with total (p = 0.0009) and low-density lipoprotein cholesterol (p < 0.0001) levels and positively correlated to high-density lipoprotein cholesterol (p = 0.002) and its subfractions. The medroxyprogesterone acetate dose showed no consistent effect on cholesterol levels. CONCLUSION: The associations found here reaffirm the significant role of estrogen replacement therapy on lipid and lipoprotein cholesterol levels and provide no evidence of a reduction in the beneficial effect of estrogen with the addition of a progestational agent to the replacement regimen. C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DEPT MOL & NUCL MED,BERKELEY,CA. RP PaganiniHill, A (reprint author), UNIV SO CALIF,SCH MED,DEPT PREVENT MED,1721 GRIFFIN AVE 200,LOS ANGELES,CA 90031, USA. FU NCI NIH HHS [CA32197]; NHLBI NIH HHS [HL33577, HL18574] NR 25 TC 21 Z9 22 U1 0 U2 0 PU MOSBY-YEAR BOOK INC PI ST LOUIS PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318 SN 0002-9378 J9 AM J OBSTET GYNECOL JI Am. J. Obstet. Gynecol. PD MAR PY 1996 VL 174 IS 3 BP 897 EP 902 DI 10.1016/S0002-9378(96)70322-8 PG 6 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA UC866 UT WOS:A1996UC86600020 PM 8633665 ER PT J AU Wolsky, AM AF Wolsky, AM TI On the bound states of a charged, nonrelativistic particle in the field of a stationary magnetic dipole: An introduction SO AMERICAN JOURNAL OF PHYSICS LA English DT Article AB The motion of ions above the earth's atmosphere is introduced by discussing the nonrelativistic motion of a charged particle in the field of a stationary magnetic dipole. Unlike the Kepler or Coulomb problem, no way is known to separate our problem into one-dimensional problems and a fortiori an exact analytic solution is not known. However, an effective potential can be identified whose study clarifies the qualitative and semiquantitative features of the bound states. We ask about the periodicity of bound states, taken for granted by one exposed only to the Kepler or Coulomb problem, and show how consideration of phase space can provide a partial answer, Poincare recurrence. The treatment is accessible to students who have a first acquaintance with the canonical formalism and Liouville's theorem, for example first-year graduate students. (C) 1996 American Association of Physics Teachers. RP Wolsky, AM (reprint author), ARGONNE NATL LAB,DIV ENERGY SYST,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 26 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0002-9505 J9 AM J PHYS JI Am. J. Phys. PD MAR PY 1996 VL 64 IS 3 BP 308 EP 316 DI 10.1119/1.18220 PG 9 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA TW978 UT WOS:A1996TW97800023 ER PT J AU Wolkin, A Sanfilipo, M Duncan, E Angrist, B Wolf, AP Cooper, TB Brodie, JD Laska, E Rotrosen, JP AF Wolkin, A Sanfilipo, M Duncan, E Angrist, B Wolf, AP Cooper, TB Brodie, JD Laska, E Rotrosen, JP TI Blunted change in cerebral glucose utilization after haloperidol treatment in schizophrenic patients with prominent negative symptoms SO AMERICAN JOURNAL OF PSYCHIATRY LA English DT Article ID POSITRON EMISSION TOMOGRAPHY; METABOLIC-RATE; BASAL GANGLIA; DEFICIT SYNDROME; BLOOD-FLOW; HYPOFRONTALITY; DOPAMINE; CORTEX; FLUORODEOXYGLUCOSE; ABNORMALITIES AB Objective: The purpose of this report was to determine 1) the effects of chronic haloperidol treatment on cerebral metabolism in schizophrenic patients, 2) the relation between negative symptoms and haloperidol-induced regional changes in cerebral glucose utilization, and 3) the relation between metabolic change and clinical antipsychotic effect. Method: Cerebral glucose utilization, as determined by positron emission tomography (PET), was studied in 18 male schizophrenic subjects before and after chronic treatment with haloperidol at a standardized plasma level. Results: Overall, haloperidol caused a widespread decrease in absolute cerebral glucose metabolism, a relative decrease in prefrontal cortex glucose metabolism, and a relative increase in striatal metabolism. The cerebral metabolic response to haloperidol was blunted in patients with high pretreatment negative symptom scores. Conclusions: Taken together with the results from a previously reported PET study of the effects of an acute amphetamine challenge (in which 14 of the current subjects participated), these data suggest that the negative symptom complex is associated with diminished cerebral response to change in dopaminergic activity. This deficit cannot be solely accounted for by structural differences. C1 NYU,CTR MED,NEW YORK,NY. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NATHAN S KLINE INST PSYCHIAT RES,ORANGEBURG,NY. RP Wolkin, A (reprint author), NEW YORK VET AFFAIRS MED CTR 116A,PSYCHIAT SERV,423 E 23RD ST,NEW YORK,NY 10010, USA. RI Duncan, Erica/B-1671-2016 FU NIMH NIH HHS [MH-42959]; NINDS NIH HHS [NS-15638] NR 50 TC 36 Z9 36 U1 0 U2 0 PU AMER PSYCHIATRIC ASSOCIATION PI WASHINGTON PA 1400 K ST NW, WASHINGTON, DC 20005 SN 0002-953X J9 AM J PSYCHIAT JI Am. J. Psychiat. PD MAR PY 1996 VL 153 IS 3 BP 346 EP 354 PG 9 WC Psychiatry SC Psychiatry GA TY356 UT WOS:A1996TY35600007 PM 8610821 ER PT J AU Schwandt, CS Cygan, RT Westrich, HR AF Schwandt, CS Cygan, RT Westrich, HR TI Ca self-diffusion in grossular garnet SO AMERICAN MINERALOGIST LA English DT Article ID ALUMINOSILICATE GARNETS; CATION DIFFUSIVITIES; COEFFICIENTS AB Use of a thin-film technique and an ion microprobe make it possible to conduct cation self-diffusion experiments of Ca-44 in near end-member grossular garnet at temperatures of 800-1000 degrees C. The experiments were conducted at 1 atm and under quartz + fayalite + magnetite f(O2) conditions. The resulting activation energy (E(a) = 155 +/- 10 kJ/mol) and the frequency factor (D-0 = 7.2 x 10(-16) m(2)/s; log D-0 = -15.1 +/- 0.4) were obtained from the temperature dependence of the diffusion data. Comparison of these data with a comparable study of Mg-25 self-diffusion coefficients in pyrope confirmed that Ca diffuses more slowly through garnet than Mg under identical conditions. C1 SANDIA NATL LABS, DEPT GEOCHEM, ALBUQUERQUE, NM 87185 USA. NR 19 TC 51 Z9 57 U1 0 U2 1 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD MAR-APR PY 1996 VL 81 IS 3-4 BP 448 EP 451 PG 4 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA UG199 UT WOS:A1996UG19900018 ER PT J AU Behm, JM Hemminger, JC Lykke, KR AF Behm, JM Hemminger, JC Lykke, KR TI Microscopic laser desorption postionization Fourier transform mass spectrometry SO ANALYTICAL CHEMISTRY LA English DT Article ID NEUTRAL MOLECULES; IONIZATION AB A microscopic laser desorption/postionization Fourier transform mass spectrometer (LD/FTMS) is described. The lateral resolution can be <1 mu m with the inherent FTMS high mass resolution intact. Laser postionization allows a certain selectivity and an increase in sensitivity. This capability should allow materials characterization in a wide variety of cases. We demonstrate microscopic desorption and postionization for atoms and molecules. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. UNIV CALIF IRVINE,INST SURFACE & INTERFACE SCI,IRVINE,CA 92717. NR 29 TC 20 Z9 20 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 1 PY 1996 VL 68 IS 5 BP 713 EP 719 DI 10.1021/ac9510999 PG 7 WC Chemistry, Analytical SC Chemistry GA TX873 UT WOS:A1996TX87300007 PM 21619164 ER PT J AU Jacobson, SC Ramsey, JM AF Jacobson, SC Ramsey, JM TI Integrated microdevice for DNA restriction fragment analysis SO ANALYTICAL CHEMISTRY LA English DT Article ID CAPILLARY ELECTROPHORESIS; CHEMICAL-ANALYSIS; SAMPLE INJECTION; SYSTEMS; CHIP AB An integrated monolithic device (8 mm x 10 mm) that performs an automated biochemical procedure is demonstrated. The device mixes a DNA sample with a restriction enzyme in a 0.7-nL reaction chamber and after a digestion period injects the fragments onto a 67-mm-long capillary electrophoresis channel for sizing. Materials are precisely manipulated under computer control within the channel structure using electrokinetic trans port. Digestion of the plasmid pBR322 by the enzyme HinfI and fragment analysis are completed in 5 min using 30 amol of DNA and 2.8 x 10(-3) unit of enzyme per run. C1 OAK RIDGE NATL LAB, DIV CHEM & ANALYT SCI, OAK RIDGE, TN 37831 USA. NR 30 TC 279 Z9 284 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD MAR 1 PY 1996 VL 68 IS 5 BP 720 EP 723 DI 10.1021/ac951230c PG 4 WC Chemistry, Analytical SC Chemistry GA TX873 UT WOS:A1996TX87300008 PM 21619165 ER PT J AU Grate, JW Patrash, SJ Abraham, MH Du, CM AF Grate, JW Patrash, SJ Abraham, MH Du, CM TI Selective vapor sorption by polymers and cavitands on acoustic wave sensors: Is this molecular recognition? SO ANALYTICAL CHEMISTRY LA English DT Letter ID SUPRAMOLECULAR CHEMISTRY; SAW-DEVICES; QMB; MICROSENSORS AB Selectivity patterns for the sorption of organic vapors from the gas phase into cavitand monolayers on acoustic wave sensors are very similar to those seen for sorption of the same vapors by amorphous polymers, demonstrating that the vapor/cavitand selectivity patterns are determined primarily by solubility interactions. The amorphous polymers serve as controls demonstrating that the three-dimensional structure of a cavitand layer is not primarily responsible for the selectivity observed. Binding and selectivity in the examples cited are governed primarily by general dispersion interactions and not by specific oriented interactions that could lead to molecular recognition. C1 UCL, DEPT CHEM, LONDON WC1H 0AJ, ENGLAND. RP Grate, JW (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, POB 999, RICHLAND, WA 99352 USA. NR 27 TC 91 Z9 93 U1 0 U2 6 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 MAR 1 PY 1996 VL 68 IS 5 BP 913 EP 917 DI 10.1021/ac950518z PG 5 WC Chemistry, Analytical SC Chemistry GA TX873 UT WOS:A1996TX87300038 PM 21619189 ER PT J AU Takano, K Latour, LL Formato, JE Carano, RAD Helmer, KG Hasegawa, Y Sotak, CH Fisher, M AF Takano, K Latour, LL Formato, JE Carano, RAD Helmer, KG Hasegawa, Y Sotak, CH Fisher, M TI The role of spreading depression in focal ischemia evaluated by diffusion mapping SO ANNALS OF NEUROLOGY LA English DT Article ID CEREBRAL-ISCHEMIA; T2-WEIGHTED MRI; BRAIN ISCHEMIA; MIGRAINE; RAT; MECHANISM; MK-801; CORTEX; INJURY; STROKE AB This study investigated the role of spontaneous and induced spreading depression (SD) on the evolution of focal ischemia in vivo. We induced focal ischemia in 12 rats using the middle cerebral artery suture occlusion (MCAO) method. Chemical stimulation of nonischemic ipsilateral cortex by potassium chloride application (KCI group; n = 7) and saline (NaCl group; n = 5) was performed at 15, 30, 45, and 60 minutes following MCAO, and SD was detected electrophysiologically. Ischemic lesion volumes assessed over 15-minute intervals, evaluated by continuous apparent diffusion coefficient (ADC) of water mapping, demonstrated that the ischemic region increased significantly during 15-minute time epochs with a single SD episode (36.5 +/- 12.9 mm(3), mean +/- SD) or multiple SD episodes (39.8 +/- 22.3) compared with those without SD (13.9 +/- 11.5) (p = 0.0009). Infarct volume at postmortem 24 hours after MCAO was significantly larger in the KCI group, with more total SDs (237.8 +/- 13.8) than the NaCl group (190.5 +/- 12.6) (p = 0.0001). This study demonstrates that ischemia-related and induced SDs increase significantly ischemic lesion volume in vivo, supporting the hypothesis for a causative role of SD in extending focal ischemic injury. C1 UNIV MASSACHUSETTS,SCH MED,DEPT NEUROL,WORCESTER,MA. UNIV MASSACHUSETTS,SCH MED,DEPT RADIOL,WORCESTER,MA. WORCESTER POLYTECH INST,DEPT BIOMED ENGN,WORCESTER,MA 01609. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RP Takano, K (reprint author), MEM HOSP,MED CTR,DEPT NEUROL,119 BELMONT ST,WORCESTER,MA 01605, USA. NR 41 TC 176 Z9 178 U1 0 U2 3 PU LITTLE BROWN CO PI BOSTON PA 34 BEACON STREET, BOSTON, MA 02108-1493 SN 0364-5134 J9 ANN NEUROL JI Ann. Neurol. PD MAR PY 1996 VL 39 IS 3 BP 308 EP 318 DI 10.1002/ana.410390307 PG 11 WC Clinical Neurology; Neurosciences SC Neurosciences & Neurology GA UC473 UT WOS:A1996UC47300006 PM 8602749 ER PT J AU Shenton, LR Bowman, KO AF Shenton, LR Bowman, KO TI Moment solution to an urn model SO ANNALS OF THE INSTITUTE OF STATISTICAL MATHEMATICS LA English DT Article DE Bernard's urn; beta integral transforms; finite difference calculus; generating function; hypergeometric distributions; hypergeometric functions; moments; replenishment-depletion urn AB A subset of Bernard's RD-model (replenishment-depletion) is considered from the viewpoint of the calculus of finite differences. The most general case is considered and includes an urn with balls of many colors, each color being replenished either deterministically or stochastically. Factorial moment generating functions (fmgfs) are employed to define probability generating functions. A new result is given for the two color case defining the fmgf and probability generating function (with probabilities) when the replenishments are positive valued random variables with given factorial moments. This result involves beta integral transforms defining a manifold of discrete distributions. Particular cases relate to hypergeometric discrete distributions. C1 OAK RIDGE NATL LAB,DIV MATH & COMP SCI,OAK RIDGE,TN 37831. RP Shenton, LR (reprint author), UNIV GEORGIA,DEPT STAT,ATHENS,GA 30602, USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0020-3157 J9 ANN I STAT MATH JI Ann. Inst. Stat. Math. PD MAR PY 1996 VL 48 IS 1 BP 169 EP 184 DI 10.1007/BF00049297 PG 16 WC Statistics & Probability SC Mathematics GA UD405 UT WOS:A1996UD40500013 ER PT J AU Pinkart, HC Wolfram, JW Rogers, R White, DC AF Pinkart, HC Wolfram, JW Rogers, R White, DC TI Cell envelope changes in solvent-tolerant and solvent-sensitive Pseudomonas putida strains following exposure to o-xylene SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID FATTY-ACIDS; OUTER-MEMBRANE; DOUBLE-BOND; AERUGINOSA; LIPOPOLYSACCHARIDES; BACTERIUM; TOLUENE; TRANS AB Solvent-tolerant and -sensitive Pseudomonas putida strains were studied to determine their cell envelope changes following exposure to o-xylene. Both strains produced trans-unsaturated fatty acids. The tolerant strain showed an increase in total fatty acids, an increase in saturated fatty acids, and modified lipopolysaccharide. It is suggested that these envelope modifications aid in survival at high concentrations of organic solvents. C1 UNIV TENNESSEE,DEPT MICROBIOL,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. IDAHO NATL ENGN LAB,BIOTECHNOL UNIT,IDAHO FALLS,ID 83415. RP Pinkart, HC (reprint author), UNIV TENNESSEE,CTR ENVIRONM BIOTECHNOL,10515 RES DR,SUITE 300,KNOXVILLE,TN 37932, USA. NR 29 TC 108 Z9 113 U1 1 U2 4 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0099-2240 J9 APPL ENVIRON MICROB JI Appl. Environ. Microbiol. PD MAR PY 1996 VL 62 IS 3 BP 1129 EP 1132 PG 4 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA TY365 UT WOS:A1996TY36500066 PM 16535264 ER PT J AU Bradford, M Riley, C AF Bradford, M Riley, C TI Session 1 - Thermal, chemical, and biological processing SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO. RP Bradford, M (reprint author), AE STALEY,DECATUR,IL, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 1 EP 1 DI 10.1007/BF02941682 PG 1 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700002 ER PT J AU Hsu, TA Himmel, M Schell, D Farmer, J Berggren, M AF Hsu, TA Himmel, M Schell, D Farmer, J Berggren, M TI Design and initial operation of a high-solids, pilot-scale reactor for dilute-acid pretreatment of lignocellulosic biomass SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE dilute sulfuric acid pretreatment; high-solids reactor; pilot-scale reactor; ethanol from biomass; prehydrolysis ID ENZYMATIC-HYDROLYSIS AB A recently installed 100-L horizontal shaft custom-fabricated mixer/reactor, made of Carpenter 20 Cb-3 stainless steel and designed for high-solids, dilute-acid pretreatment of lignocellulosic biomass, is described. Several preliminary runs with a hardwood and a herbaceous feedstock are reported; the results show the operation to be reliable with good reproducibility. No significant differences between comparable pretreatments in the high-solids reactor and a 1-L laboratory-scale reactor are apparent. Pretreatment efficiency is not affected by 10-15% (w/w) solids loading or biomass particle size of up to -10 mm. Mass balances are closed reasonably well, with improvement in reactor contents handling and biomass analytical methods desirable. C1 HAZEN RES INC,GOLDEN,CO. RP Hsu, TA (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,GOLDEN,CO 80401, USA. NR 32 TC 11 Z9 12 U1 0 U2 6 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 3 EP 18 DI 10.1007/BF02941683 PG 16 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700003 ER PT J AU Torget, R Hatzis, C Hayward, TK Hsu, TA Philippidis, GP AF Torget, R Hatzis, C Hayward, TK Hsu, TA Philippidis, GP TI Optimization of reverse-flow, two-temperature, dilute-acid pretreatment to enhance biomass conversion to ethanol SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE counterconcurrent pretreatment; dilute-acid pretreatment; ethanol; xylan kinetics; percolation reactor ID HYDROLYSIS; XYLAN; SACCHARIFICATION; PREHYDROLYSIS; HEMICELLULOSE; CELLULOSE; WATER AB A reverse-flow, two-temperature dilute-acid prehydrolysis process of commercial yellow poplar sawdust using two percolation reactors was designed to simulate countercurrent flow of the biomass solids and prehydrolysis liquor, and to exploit the xylan biphasic kinetics. Lower temperatures (150-174 degrees C) are initially applied to hydrolyze the easily hydrolyzable xylan, and higher temperatures (180-204 degrees C) are applied to hydrolyze the remaining xylan. Two reactors were used to optimize each temperature range, using Varying concentrations of sulfuric acid from 0.073-0.73 wt% and reaction times. Yields of soluble xylose, as high as 97% of theoretical, expressed as monomeric and oligomeric xylose, have been achieved with only 2.9% of the xylan being degraded to furfural, at concentrations of total potential sugar between 2.4 and 3.7 wt% before flashing. Depending on the combined severity of the acid concentration, residence time of the solids and liquor, and temperature of prehydrolysis, 81-100% of the hemicellulose, 3-32% of the glucans, and up to 46% of the Klason lignin could be solubilized. The lignocellulosic substrate produced from the pretreatment is readily converted to ethanol at a yield of approx 91% of theoretical, with ethanol concentrations of up to 4.0 wt% in 55 h via a simultaneous saccharification and fermentation (SSF) process. In terms of xylose recovery and ethanol production level and rate, the present results are far superior to those previously reported using a single-temperature, dilute-acid pretreatment. RP Torget, R (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,GOLDEN,CO 80401, USA. RI Hatzis, Christos/M-3867-2015 OI Hatzis, Christos/0000-0002-8120-2290 NR 42 TC 47 Z9 49 U1 1 U2 7 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 85 EP 101 DI 10.1007/BF02941691 PG 17 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700011 ER PT J AU Chen, RF Lee, YY Torget, R AF Chen, RF Lee, YY Torget, R TI Kinetic and modeling investigation on two-stage reverse-flow reactor as applied to dilute-acid pretreatment of agricultural residues SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE dilute-acid pretreatment; kinetics, modeling; percolation; corn cobs/stover mixture ID PERCOLATION PROCESS; HEMICELLULOSE; HYDROLYSIS AB The kinetics of dilute-acid pretreatment/hydrolysis of the hemicellulose in a mixture of corn cobs and corn stover was investigated. The kinetic data confirmed that the hemicellulose in this feedstock is of a biphasic nature. The kinetic model recognizes the presence of soluble xylose oligomers, xylose monomer, and the decomposition of xylose. The kinetic parameters were determined over the conditions of 120-150 degrees C, and sulfuric acid concentration of 0.44-1.90%. The biphasic nature of the kinetics brings about an additional flexibility in the reactor design and the operation strategy, since different reaction conditions can be applied to each of the two different fractions of hemicellulose in the feedstock. With incorporation of the kinetic data, a percolation reactor operated under various modes, uniform temperature, temperature step change (along with or without flow rate step change), and two-stage reverse-flow operation, was modeled and investigated for its performance. The modeling results affirmed that a step-change/reverse-flow operation is advantageous for biphasic substrates, including agricultural residues. The optimum temperature difference in the step-change operation was determined to be 30 degrees C over a wide range of reaction temperature. Temperature step change alone (without use of reverse-flow mode) increased the product yield by 3-11% (depending on the reaction conditions) over that of uniform temperature operation. The most significant improvement, however, was seen with application of a two-stage reverse-flow reactor arrangement with temperature step change employing different conditions at each stage. This operation essentially doubled the sugar concentration over that of the temperature step change operation. C1 AUBURN UNIV,DEPT CHEM ENGN,AUBURN,AL 36849. NATL RENEWABLE ENERGY LAB,GOLDEN,CO. NR 11 TC 35 Z9 35 U1 0 U2 10 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 133 EP 146 DI 10.1007/BF02941694 PG 14 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700014 ER PT J AU Rivard, CJ Engel, RE Hayward, TK Nagle, NJ Hatzis, C Philippidis, GP AF Rivard, CJ Engel, RE Hayward, TK Nagle, NJ Hatzis, C Philippidis, GP TI Measurement of the inhibitory potential and detoxification of biomass pretreatment hydrolysate for ethanol production SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE microtox; toxicity assay; ethanol fermentation; dilute-acid hydrolysis; detoxification AB The Microtox assay represents a rapid, accurate, and reproducible method for determining general microbial toxicity. This assay was used to evaluate the relative toxicity of a variety of hydrolysate samples derived from dilute-acid and alkaline biomass pretreatment. Toxicity is elicited from biomass degradation products, such as furfural, hydroxymethyl furfural, and acetic acid, generated during pretreatment. Microtox results indicate that the pretreatment samples examined ranged from 9 to 71 toxicity units (TU). Correlations of TU and sample absorbance at several wavelengths were evaluated for all sample series. Sample TU values best agreed with absorbance at 230 nn, but the unsatisfactory fit suggests that absorbance should not be used as an absolute measure of sample toxicity. Microtox data for pretreatment hydrolysate samples were correlated with the inhibition experienced by the ethanologenic yeast, Saccharomyces cerevisiae strain D(5)A, during the simultaneous saccharification and fermentation (SSF) process of pretreated biomass. None of the alkaline pretreatment conditions produced inhibition during SSF (data not shown). However, the acid pretreatment conditions did produce a wide range of inhibitory and noninhibitory hydrolysates. In general, fermentation was inhibited for acid-pretreated hydrolysate samples with values exceeding 45 TU. Preliminary studies that focused on reducing hydrolysate sample toxicity (detoxification) indicate that adding perlite and zeolite had little effect. However, the use of charcoal, a universal flocculent, or ion-exchange resins significantly reduced sample toxicity, holding promise for the efficient bioconversion of pretreated biomass to ethanol. Moreover, the developed toxicity measurement assay can quickly monitor the quality of the pretreatment process. In this way, biomass conversion operation processes can be reliably controlled at the pilot and commercial scales. C1 NATL RENEWABLE ENERGY LAB,BIOPROC BRANCH,GOLDEN,CO. RP Rivard, CJ (reprint author), NATL RENEWABLE ENERGY LAB,APPL BIOL SCI BRANCH,GOLDEN,CO, USA. RI Hatzis, Christos/M-3867-2015 OI Hatzis, Christos/0000-0002-8120-2290 NR 4 TC 22 Z9 22 U1 0 U2 4 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 183 EP 191 DI 10.1007/BF02941698 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700018 ER PT J AU Carlson, T Apel, WA AF Carlson, T Apel, WA TI Applied biological research SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 IDAHO NATL LAB,IDAHO FALLS,ID. RP Carlson, T (reprint author), CARGILL INC,DAYTON,OH, USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 193 EP 193 DI 10.1007/BF02941699 PG 1 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700019 ER PT J AU Dunahay, TG Jarvis, EE Dais, SS Roessler, PG AF Dunahay, TG Jarvis, EE Dais, SS Roessler, PG TI Manipulation of microalgal lipid production using genetic engineering SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE biodiesel; diatoms; genetic transformation; lipid synthesis; microalgae ID CYCLOTELLA-CRYPTICA; FIREFLY LUCIFERASE; TRANSFORMATION; EXPRESSION; TRANSIENT; COENZYME AB Genetic transformation of two species of diatoms has been accomplished by introducing chimeric plasmid vectors containing a bacterial antibiotic resistance gene driven by regulatory sequences from the acetyl-CoA carboxylase (ACCase) gene from the diatom Cyclotella cryptica. The recombinant DNA integrated into one or more random sites within the algal genome and the foreign protein was produced by the algal transformants. This is the first report of genetic transformation of any chlorophyll c-containing microalgal strain. We are using this system to introduce additional copies of the ACCase gene into diatoms in an attempt to manipulate lipid accumulation in transformed strains. RP Dunahay, TG (reprint author), NATL RENEWABLE ENERGY LAB,APPL BIOL SCI BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 20 TC 125 Z9 133 U1 10 U2 89 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 223 EP 231 DI 10.1007/BF02941703 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700023 ER PT J AU Polman, JK Rae, C DelezeneBriggs, KM AF Polman, JK Rae, C DelezeneBriggs, KM TI Coal-induced enhancement of ethanol and biomass production SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE ethanol; coal; chelator; Saccharomyces; Zygosaccharomyces ID MOLECULAR-STRUCTURE AB Inclusion of coal in Saccharomyces cerevisiae cultures enhanced ethanol and biomass production (from dextrose) similarly to yeast extract. Coal-induced enhancement was slower in comparison to yeast extract. Ethanol/biomass ratios were twice as high for coal-induced enhancement. Humic acid also enhanced ethanol and biomass production. Coal supplied nitrogen, phosphorus, magnesium, and zinc to cells. Coal facilitated the utilization of cobalt, and reduced the toxicity of aluminum and manganese. Coal-induced enhancement may be a chelation effect; ethylenediaminetetraacetic acid mimicked coal enhancement. Coal also enhanced ethanol and biomass production by Zygosaccharomyces rouxii. RP Polman, JK (reprint author), LOCKHEED IDAHO TECHNOL CO,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 327 EP 338 DI 10.1007/BF02941711 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700031 ER PT J AU Laymon, RA Adney, WS Mohagheghi, A Himmel, ME Thomas, SR AF Laymon, RA Adney, WS Mohagheghi, A Himmel, ME Thomas, SR TI Cloning and expression of full-length Trichoderma reesei cellobiohydrolase I cDNAs in Escherichia coli SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE cellobiohydrolase I (CBHI); T-reesei; cellulases; fusion proteins ID SACCHAROMYCES-CEREVISIAE; CELLULASES; STRAIN-L27; SYNERGISM AB The process of converting lignocellulosic biomass to ethanol via fermentation depends on developing economic sources of cellulases. Trichoderma reesei cellobiohydrolase (CBH) I is a key enzyme in the fungal cellulase system; however, specific process application requirements make modification of the enzyme by site-directed mutagenesis (SDM) an attractive goal. To undertake SDM investigations, an efficient, cellulase-free host is required. To test the potential of Escherichia coli as a host, T. reesei CBH I cDNA was expressed in E. coli strain GI724 as a C-terminal fusion to thermostable thioredoxin protein; Full-length expression of CBH I was subsequently verified by molecular weight, Western blot analysis, and activity on soluble substrates. C1 NATL RENEWABLE ENERGY LAB, ALTERNAT FUELS DIV, APPL BIOL SCI BRANCH, GOLDEN, CO 80401 USA. NR 22 TC 29 Z9 31 U1 0 U2 3 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 EI 1559-0291 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 389 EP 397 DI 10.1007/BF02941718 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700038 PM 8669906 ER PT J AU Philippidis, GP Ollis, DF AF Philippidis, GP Ollis, DF TI Bioprocessing research SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 N CAROLINA STATE UNIV,RALEIGH,NC 27695. RP Philippidis, GP (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 431 EP 431 DI 10.1007/BF02941723 PG 1 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700043 PM 8669910 ER PT J AU Hatzis, C Riley, C Philippidis, GP AF Hatzis, C Riley, C Philippidis, GP TI Detailed material balance and ethanol yield calculations for the biomass-to-ethanol conversion process SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE carbon balance; dilute-acid pretreatment; simultaneous saccharification and fermentation; enzymatic conversion; overall yield AB Applying material balance calculations to the evaluation and optimization of lignocellulosic biomass conversion processes is fundamentally important. The lack of a general framework for material balance calculations and inconsistent compositional analysis data have made it difficult to compare results from different research groups. Material balance templates have been developed to follow accurately the distribution of carbon in lignocellulosic substrates through the pretreatment and simultaneous saccharification and fermentation (SSF) processes, and provide information on overall carbon recovery, recovery of individual sugars, and solubilization of biomass components. Based on material balance considerations, we developed equations that allow us to compute overall ethanol yields for biochemical conversion of biomass correctly. C1 NATL RENEWABLE ENERGY LAB, ALTERNAT FUELS DIV, ANAL & PROJECT MANAGEMENT BRANCH, GOLDEN, CO 80401 USA. RP Hatzis, C (reprint author), NATL RENEWABLE ENERGY LAB, BIOPROC DEV BRANCH, 1617 COLE BLVD, GOLDEN, CO 80401 USA. RI Hatzis, Christos/M-3867-2015 OI Hatzis, Christos/0000-0002-8120-2290 NR 27 TC 20 Z9 20 U1 1 U2 10 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 443 EP 459 DI 10.1007/BF02941725 PG 17 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700045 ER PT J AU Kaufman, EN Cooper, SP Budner, MK Richardson, GR AF Kaufman, EN Cooper, SP Budner, MK Richardson, GR TI Continuous and simultaneous fermentation and recovery of lactic acid in a biparticle fluidized-bed bioreactor SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE lactic acid fermentation; resin; adsorbent; biparticle fluidized bed; continuous ID IMMOBILIZED CELLS; KINETIC-MODEL; BIOCONVERSION; RECYCLE; REACTOR; SYSTEMS AB A continuous biparticle fluidized-bed reactor (BFBR) is developed for the simultaneous fermentation and recovery of lactic acid. In this processing scheme, bacteria are immobilized in gelatin beads and are fluidized in a columnar reactor. Solid particles (weak-base resin IRA-35) with sorbent capacity for the product are introduced at the top of the reactor and fall countercurrently to the biocatalyst, effecting in situ removal of the inhibitory lactic acid while also controlling reactor pH at optimal levels. One-week-long fermentation trials using immobilized Lactobacillus delbreuckii with sorbent addition demonstrated a volumetric productivity (6.9 g/L . h) at least 16-fold higher than that of a free-cell batch fermentation with base pH control and identical biomass concentration and medium composition. Regeneration of the loaded sorbent from the BFBR has effected a 35-fold concentration of lactic acid compared with original levels in the fermentation broth (70 vs 2 g/L). Lactic acid concentrations as high as 610 g/L have been observed when the loading solution contained 50 g/L lactic acid. Rich medium formulations did not seem to increase BFBR performance. The benefits of this reactor system, as opposed to conventional batch fermentation, are discussed in terms of productivity and process economics. RP Kaufman, EN (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,BIOPROC RES & DEV CTR,OAK RIDGE,TN 37831, USA. NR 40 TC 16 Z9 16 U1 0 U2 3 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 503 EP 515 DI 10.1007/BF02941730 PG 13 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700050 ER PT J AU Tsouris, C Lizama, HM Spurrier, MA Takeuchi, TL Scott, TC AF Tsouris, C Lizama, HM Spurrier, MA Takeuchi, TL Scott, TC TI Hydrodynamics of bioreactor systems for liquid-liquid contacting SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE sulfate-reducing bacteria; electrostatic dispersion; electrostatic spraying; liquid contactor ID FLOW AB Two liquid-liquid bioreactors, a stirred-tank and a novel electrostatic-dispersion system, are being used to investigate biodesulfurization of oil by sulfate-reducing bacteria (SRB). The hydrodynamic behavior of both bioreactors under various operating conditions is discussed in this article. The total liquid volume of the stirred-tank system is 1 L in a 1.5-L cylindrical tank equipped with two baffles and two Rushton-type six-blade impellers. The steady-state average drop size (d(32)) was determined by a video technique, and correlated with operating conditions, physical properties, and system geometry. Although the stirred-tank geometry was not standard, the d(32) correlation was found to be in good agreement with correlations reported in the literature. For the electrostatic dispersion system, a 0.25-L column was used with kerosene as the continuous phase and water containing SRB as the dispersed phase. Microdroplets were obtained by the break-up of the aqueous phase meniscus at the tip of a capillary tube using pulsed direct current (dc) electric fields. The size of the drops ejected from the capillary was measured as a function of the intensity of the applied voltage. Preliminary results showed no deleterious effect of electrospray dispersion on bacteria viability. RP Tsouris, C (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. RI Unciano, Noel/B-6810-2009; Tsouris, Costas/C-2544-2016 OI Tsouris, Costas/0000-0002-0522-1027 NR 10 TC 14 Z9 14 U1 0 U2 2 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 581 EP 592 DI 10.1007/BF02941738 PG 12 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700058 ER PT J AU Nghiem, NP Davison, BH Thompson, JE Suttle, BE Richardson, GR AF Nghiem, NP Davison, BH Thompson, JE Suttle, BE Richardson, GR TI The effect of biotin on the production of succinic acid by Anaerobiospirillum succiniciproducens SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE succinic acid; fermentation; Anaerobiospirillum succiniciproducens; biotin RP Nghiem, NP (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,MS-6226,OAK RIDGE,TN 37831, USA. RI Davison, Brian/D-7617-2013 OI Davison, Brian/0000-0002-7408-3609 NR 7 TC 14 Z9 14 U1 1 U2 5 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 633 EP 638 DI 10.1007/BF02941744 PG 6 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700064 ER PT J AU Webb, OF Davison, BH Scott, TC AF Webb, OF Davison, BH Scott, TC TI Modeling scale-up effects on a small pilot-scale fluidized-bed reactor for fuel ethanol production SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE ethanol; dextrose; fermentation; fluidized-bed reactor; modeling ID ZYMOMONAS-MOBILIS; BIOREACTOR; DISPERSION; BEADS RP Webb, OF (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,MS-6226,OAK RIDGE,TN 37831, USA. RI Davison, Brian/D-7617-2013 OI Davison, Brian/0000-0002-7408-3609 NR 17 TC 4 Z9 4 U1 0 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 639 EP 647 DI 10.1007/BF02941745 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700065 ER PT J AU Combs, N Hatzis, C AF Combs, N Hatzis, C TI Development of an epi-fluorescence assay for monitoring yeast viability and pretreatment hydrolysate toxicity in the presence of lignocellulosic solids SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE viability; fluorescence staining; Saccharomyces cerevisiae; hydrolysate toxicity RP Combs, N (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,BIOPROC DEV BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. RI Hatzis, Christos/M-3867-2015 OI Hatzis, Christos/0000-0002-8120-2290 NR 17 TC 3 Z9 3 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 649 EP 657 DI 10.1007/BF02941746 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700066 PM 8669916 ER PT J AU Lin, MS Premuzic, ET Yablon, JH Zhou, WM AF Lin, MS Premuzic, ET Yablon, JH Zhou, WM TI Biochemical processing of heavy oils and residuum SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE biotechnology; petroleum; sulfur; nitrogen; metal C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,BIOSYST & PROC SCI DIV,UPTON,NY 11973. NR 6 TC 12 Z9 12 U1 0 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 659 EP 664 DI 10.1007/BF02941747 PG 6 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700067 ER PT J AU Mielenz, JR Koepping, D Parson, F AF Mielenz, JR Koepping, D Parson, F TI Commercialization of biomass ethanol technology - Feasibility studies for biomass-to-ethanol production facilities SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE biomass; ethanol; production facilities AB With the recent commissioning of the National Renewable Energy Laboratory's (NREL) process development unit, through the support of the US Department of Energy (DOE) Biofuels Program, the technology to convert lignocellulosic biomass to fuel ethanol enzymatically has reached the pilot scale. The next step will be to construct precommercial-scale engineering demonstration units, which will probably be built at or near proposed commercial plant sites, to demonstrate this technology at selected biomass-rich locations in the US. Proper site selection can be critical to these units' long-term profitability, so DOE and NREL have begun a program to help industrial partners build sound business plans that include detailed siting studies. These studies examine biomass availability and cost projections, delineate site requirements, identify qualifying sites, examine environmental and community impacts, and provide detailed pro forma financial evaluations and projections. The DOE/NREL ethanol project currently supports several plans that help industry identify economically viable commercial opportunities for biomass ethanol. RP Mielenz, JR (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,GOLDEN,CO 80401, USA. NR 7 TC 4 Z9 4 U1 0 U2 3 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 667 EP 676 DI 10.1007/BF02941749 PG 10 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700069 ER PT J AU Lynd, LR Elander, RT Wyman, CE AF Lynd, LR Elander, RT Wyman, CE TI Likely features and costs of mature biomass ethanol technology SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE ethanol; biomass; energy; mature technology; economics ID CLOSTRIDIUM-THERMOCELLUM; SACCHARIFICATION; FERMENTATION AB Analysis is undertaken motivated by the question: ''What are the likely features and cost of a facility producing ethanol from cellulosic biomass at a level of maturity comparable to a refinery?'' This question is considered with respect to cost reductions arising from increased scale, lower-cost feedstock, and process improvements in pretreatment and biological conversion, but not other process steps. An ''advanced technology'' scenario is developed that represents our estimate of the most likely features of mature biomass ethanol technology. A ''best-parameter'' scenario, intended to be indicative of the potential for R&D-driven cost reductions, is also developed based on the best values for individual process parameters reported in the literature. Both scenarios involve large plants (2.7 million dry t feedstock/yr). Feedstock costs are taken to be $38.60/delivered dry t for the advanced scenario and $34.00/delivered dry t for the best-parameter scenario. Projected selling prices, including operating costs and capital recovery corresponding to a 14.2% return on investment, are 50 cent/gal (pure ethanol basis) for the advanced technology case and 34 cent/gal for the best-parameter case. These are markedly lower than the 118 cent/gal selling price projected for base-case technology, with the largest share of cost reductions due to improved conversion technology. Key conversion technology improvements include, in order of importance, consolidated bioprocessing, advanced pretreatment, elimination of seed reactors, and faster rates. First-law thermodynamic efficiencies based on the biomass high heating value and production of ethanol and electricity are 61.2% for the advanced case and 69.3% for the best-parameter case, as compared to 50.3% currently. Combining advanced ethanol production technology of the type presented here with advanced gas turbine-based power generation is a promising direction for future analysis and may offer still further cost reductions and efficiency increases. C1 INDEPENDENCE BIOFUEL INC,MERIDEN,NH. NATL RENEWABLE ENERGY LAB,GOLDEN,CO. RP Lynd, LR (reprint author), DARTMOUTH COLL,THAYER SCH ENGN,HANOVER,NH 03755, USA. RI Lynd, Lee/N-1260-2013 OI Lynd, Lee/0000-0002-5642-668X NR 23 TC 184 Z9 190 U1 3 U2 24 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 741 EP 761 DI 10.1007/BF02941755 PG 21 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700075 ER PT J AU Sublette, K Klasson, KT AF Sublette, K Klasson, KT TI Environmental biotechnology SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 OAK RIDGE NATL LAB,OAK RIDGE,TN. RP Sublette, K (reprint author), UNIV TULSA,TULSA,OK 74104, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 777 EP 777 DI 10.1007/BF02941757 PG 1 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700077 ER PT J AU Chapatwala, KD Bau, GRV Vijaya, OK Armstead, E Palumbo, AV Zhang, C Phelps, TJ AF Chapatwala, KD Bau, GRV Vijaya, OK Armstead, E Palumbo, AV Zhang, C Phelps, TJ TI Effect of temperature and yeast extract on microbial respiration of sediments from a shallow coastal subsurface and vadose zone SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE subsurface sediments; respiration; carbon dioxide (CO2); yeast extract; micro-oxymax respirometer; wafer; production ID BACTERIA; SOILS AB As a part of our study on microbial heterogeneity in subsurface environments, we have examined the microbial respiration of sediment samples obtained from a coastal site near Oyster, VA. The sediments at the site are unconsolidated, fine to coarse beach sand and gravel. A Columbus Instruments Micro-Oxymax Respirometer was used to measure the rate of carbon dioxide (CO2) production during the respiration of the sediment samples. The rate of respiration of the Sediment samples ranged from 0.035-0.6 mu L CO2/h/g of the sediment. The sediment samples showing maximum (0.6 mu L CO2/h/g) and minimum (0.035 mu L CO2/h/g) production of CO2 were selected to study the effect of micronutrient-yeast extract (0.5 and 1.0 mu g/g of the sediment) and water (0.5 and 1.0 mL) on the rate of CO2 production. The rate of CO2 production increased with the addition of water, but increased approx 2 orders of magnitude (from 0.26 to an average of 23.5 mu L CO2/h/g) when 1.0 g/g yeast extract was added to the sediment samples. In these coastal sediments, temperature, depth, and addition of water influenced microbial activity, but the addition of 1.0 mu g/g yeast extract as a micronutrient rapidly increased the rate of CO2 production 2 orders of magnitude. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RP Chapatwala, KD (reprint author), SELMA UNIV,DIV NAT SCI,SELMA,AL 36701, USA. RI Palumbo, Anthony/A-4764-2011; phelps, tommy/A-5244-2011 OI Palumbo, Anthony/0000-0002-1102-3975; NR 15 TC 3 Z9 3 U1 0 U2 3 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 827 EP 835 DI 10.1007/BF02941762 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700082 PM 8669920 ER PT J AU Evans, BS Dudley, CA Klasson, KT AF Evans, BS Dudley, CA Klasson, KT TI Sequential anaerobic-aerobic biodegradation of PCBs in soil slurry microcosms SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE PCB; anaerobic-aerobic biodegradation; soil slurry microcosms; bioremediation ID HUDSON RIVER SEDIMENTS; POLYCHLORINATED-BIPHENYLS; DECHLORINATION; MICROORGANISMS; BACTERIA; AROCLORS AB Many industrial locations have identified the need for treatment of polychlorinated biphenyl (PCB) wastes and remediation of PCB-contaminated sites. Biodegradation of PCBs is a potentially effective technology for treatment of PCB-contaminated soils and sludges; however, a practicable remediation technology has not yet been demonstrated. In laboratory experiments, soil slurry microcosms inoculated with microorganisms extracted from PCB-contaminated Hudson River sediments have been used for anaerobic dechlorination of weathered Aroclor 1248 in contaminated soil with a low organic carbon content. Anaerobic incubation was then followed by exposure to air, addition of biphenyl, and inoculation with Pseudomonas sp. LB400, an aerobic PCB degrader. The sequential anaerobic-aerobic treatment constituted an improvement compared to anaerobic or aerobic treatment alone by reducing the total amount of PCBs remaining and decreasing the tendency for end products to accumulate in humans. A 70% reduction of PCBs was observed during sequential treatment with products containing fewer chlorines and having a shorter half-life in humans than the original PCBs. The aerobic treatment alone was also quite effective as a stand-alone treatment reducing the PCBs by 67%. The results represent a case in which anaerobic river sediment organisms have been successfully transferred to a matrix free of river or lake sediments. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. OI Klasson, K. Thomas/0000-0003-3358-3081 NR 29 TC 35 Z9 42 U1 4 U2 16 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 885 EP 894 DI 10.1007/BF02941769 PG 10 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700089 PM 8669923 ER PT J AU Palumbo, AV Zhang, CL Liu, S Scarborough, SP Pfiffner, SM Phelps, TJ AF Palumbo, AV Zhang, CL Liu, S Scarborough, SP Pfiffner, SM Phelps, TJ TI Influence of media on measurement of bacterial populations in the subsurface - Numbers and diversity SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE diversity; CFU; bioremediation; media, subsurface; microbiology; fungi ID RIBOSOMAL-RNA SEQUENCES; MICROBIAL COMMUNITIES; PHYSIOLOGICAL DIVERSITY; COASTAL-PLAIN; SEDIMENTS; OKLAHOMA; ATLANTIC; SITE AB To examine the factors contributing to microbial heterogeneity, the US Department of Energy Subsurface Science Program has initiated research at a Coastal Plain site near Oyster, VA. Sediments at the site are composed of unconsolidated, fine to coarse beach sands and gravel. The influence of microbiological culture media on the measurement of colony-forming units (CFU) and microbial diversity was examined in this study. Two low-nutrient media formulations (i.e., dilute peptone, tryptone, yeast extract, and glucose medium [PTYG] and a soil extract medium) gave equivalent estimates of CFU (maximum of about 6.5 x 10(5) CFU/g). However, a higher nutrient medium, organic nutrients with brain-heart infusion (N/BHI), gave lower numbers than the dilute PTYG. A medium used to enumerate fungi also gave significantly lower counts than the dilute PTYG medium. Although the correlations were highly significant among total CFU numbers measured with the different types of media, we found few significant correlations in several indices of microbial diversity, and the correlation coefficients were below 0.25. Thus, CFU was a relatively robust measurement,but microbial diversity was not consistent between the media. Species richness was highest with the higher nutrient N/BHI medium, and N/BHI may be a better choice for a study of diversity as determined by colony morphology. RP Palumbo, AV (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. RI Palumbo, Anthony/A-4764-2011; phelps, tommy/A-5244-2011 OI Palumbo, Anthony/0000-0002-1102-3975; NR 27 TC 11 Z9 13 U1 1 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 905 EP 914 DI 10.1007/BF02941771 PG 10 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700091 ER PT J AU BerededSamuel, Y Petersen, JN Skeen, RS AF BerededSamuel, Y Petersen, JN Skeen, RS TI Effect of perchloroethylene (PCE) on methane and acetate production by a methanogenic consortium SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE methanogenic; acetogenic; PCE; inhibition ID REDUCTIVE DECHLORINATION; TETRACHLOROETHYLENE; TOXICITY; TRICHLOROETHYLENE; BACTERIA; CHLORIDE AB The effects of perchloroethylene (PCE) concentration in the range of 0-100 mg/L on methane and acetate production by a methanol-enriched methanogenic consortia were investigated at 17 degrees C. The results indicate that PCE is more inhibitory to methanogenesis than to acetogenesis. At concentrations as low as 10 ppm, PCE affects the methanogenic activity of the consortium, and has completely inhibited this activity at 100 ppm. Conversely, PCE does not begin to inhibit acetogenic activity until the concentration is above 10 ppm, and has not completely inhibited it even at a PCE concentration of 100 ppm. C1 WASHINGTON STATE UNIV, DEPT CHEM ENGN, PULLMAN, WA 99164 USA. PACIFIC NW LAB, RICHLAND, WA USA. RI Petersen, James/B-8924-2008 NR 15 TC 3 Z9 3 U1 1 U2 1 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 915 EP 922 DI 10.1007/BF02941772 PG 8 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700092 ER PT J AU Zhang, CL Liu, S Logan, J Mazumder, R Phelps, TJ AF Zhang, CL Liu, S Logan, J Mazumder, R Phelps, TJ TI Enhancement of Fe(III), Co(III), and Cr(VI) reduction at elevated temperatures and by a thermophilic bacterium SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE thermophilic bacterium; metal reduction; ferric citrate; Co(III)EDTA; chromate ID FERRIC IRON; ENVIRONMENTS; MANGANESE AB An unusual thermophilic bacterium has been isolated from deep subsurface sediments and tested for its ability to enhance Fe(III), Co(III), and Cr(VI) reduction. Without the bacterium, abiotic metal reduction was insignificant at temperatures below 45 degrees C, but became a major process at 75 degrees C. Addition of the bacterium enhanced the reduction of these metals up to fourfold, probably by nonspecific mechanisms. This study demonstrates abiotic and biotic metal reduction under organic-rich thermic conditions, and suggests that thermally and/or biologically enhanced metal reduction may provide an alternative for remediating metal contamination. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RI phelps, tommy/A-5244-2011 NR 22 TC 42 Z9 45 U1 0 U2 6 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 923 EP 932 DI 10.1007/BF02941773 PG 10 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700093 ER PT J AU Rivard, CJ Nagle, NJ AF Rivard, CJ Nagle, NJ TI Pretreatment technology for the beneficial biological reuse of municipal sewage sludges SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE sewage sludge; pretreatment, shear; sonication; thermal treatment; anaerobic digestion AB Modern municipal sewage waste treatment plants use conventional mechanical and biological processes to reclaim waste waters. This process has the overall effect of converting a water pollution problem into a solid waste disposal problem (sludges). The costs for conventional disposal of Sewage sludges have risen dramatically because of increased environmental mandates, which restrict their disposal, as well as a dwindling number of landfills. Previously, we determined that secondary bioprocessing (specifically anaerobic digestion) was not effective in reducing the organic content and bulk of the sludge waste (1). Therefore, we have examined the potential of a variety of pretreatment technologies designed to disrupt the macrostructure of the sludge and thereby enhance its subsequent biodegradation. Two thermal/mechanical pretreatments tested were found to have a dramatic effect on the subsequent bioconversion of the microbial sludges. Both technologies evaluated, sonication and shear, were found to be affected by sludge solids levels, duration of treatment, and treatment temperature. Optimum sonication pretreatment occurred with sludge solids of 1% and treatment times of 4-8 min. The most effectivee treatment temperature tested was 55 degrees C. The optimum enhancement in bioconversion potential for the sonication pretreatment was 80-83% of the materials carbon oxygen demand (COD) content. The optimum shear pretreatment occurred with sludge solids of 1-2% and treatment times of 6-10 min. The most effective treatment temperature tested was 87 degrees C. The optimum enhancement in bioconversion potential for the shear pretreatment was 88-90% of the material's COD content. These data were the basis for US parent no. 5,380,445, granted January 10, 1995. RP Rivard, CJ (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,APPL BIOL SCI BRANCH,GOLDEN,CO 80401, USA. NR 26 TC 11 Z9 12 U1 2 U2 11 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 983 EP 991 DI 10.1007/BF02941778 PG 9 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700098 ER PT J AU Selvaraj, PT Meyer, GB Kaufman, EN AF Selvaraj, PT Meyer, GB Kaufman, EN TI Microbial reduction of sulfur dioxide in immobilized, mixed cultures of sulfate-reducing bacteria with sewage digest as carbon and energy source SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Article; Proceedings Paper CT 17th Symposium on Biotechnology for Fuels and Chemicals CY MAY 07-11, 1995 CL VAIL, CO SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol DE sulfur dioxide; flue gas desulfurization; sulfate-reducing bacteria; anaerobic digestion; immobilization ID BEADS RP Selvaraj, PT (reprint author), OAK RIDGE NATL LAB,BIOPROC RES & DEV CTR,OAK RIDGE,TN 37831, USA. NR 10 TC 7 Z9 7 U1 0 U2 3 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP 993 EP 1002 DI 10.1007/BF02941779 PG 10 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700099 ER PT J AU Wyman, CE Davison, BH AF Wyman, CE Davison, BH TI Introduction to the Proceedings of the Seventeenth Symposium on Biotechnology for Fuels and Chemicals SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY LA English DT Editorial Material C1 OAK RIDGE NATL LAB,OAK RIDGE,TN. RP Wyman, CE (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Davison, Brian/D-7617-2013 OI Davison, Brian/0000-0002-7408-3609 NR 0 TC 0 Z9 0 U1 0 U2 0 PU HUMANA PRESS INC PI TOTOWA PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 SN 0273-2289 J9 APPL BIOCHEM BIOTECH JI Appl. Biochem. Biotechnol. PD SPR PY 1996 VL 57-8 BP R3 EP R6 DI 10.1007/BF02941681 PG 4 WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology GA UL857 UT WOS:A1996UL85700001 ER PT J AU Babu, GRV Vijaya, OK Ross, VL Wolfram, JH Chapatwala, KD AF Babu, GRV Vijaya, OK Ross, VL Wolfram, JH Chapatwala, KD TI Cell-free extract(s) of Pseudomonas putida catalyzes the conversion of cyanides, cyanates, thiocyanates, formamide, and cyanide-containing mine waters into ammonia SO APPLIED MICROBIOLOGY AND BIOTECHNOLOGY LA English DT Article ID IMMOBILIZED CELLS; NITRILE COMPOUNDS; DEGRADATION; FLUORESCENS; PURIFICATION; ENZYME; BIODEGRADATION; ACETONITRILE; NITROGEN; STRAIN AB Our isolate, Pseudomonas putida, is known to be capable of utilizing cyanides as the sole source of carbon (C) and nitrogen (N) both in the form of free cells and cells immobilized in calcium alginate. In the present study, the cell-free extract(s) were prepared from the cells of P. putida grown in the presence of sodium cyanide. The ability of enzyme(s) to convert cyanides, cyanates, thiocyanates, formamide and cyanide-containing mine waters into ammonia (NH3) was studied at pH 7.5 and pH 9.5. The kinetic analysis of cyanide and formamide conversion into NH3 at pH 7.5 and pH 9.5 by the cell-free extract(s) of P. putida was also studied. The K-m and V-max values for cyanide/formamide were found to be 4.3/8 mM and 142/227 mu mol NH3 released mg protein(-1) min(-1) respectively at pH 7.5 and 5/16.67 mM and 181/434 mu mol NH3 released mg protein(-1) h(-1) respectively at pH 9.5. The study thus concludes that the cell-free extract(s) of P. putida is able to metabolize not only cyanides, cyanates, thiocyanates, and formamide but also cyanide-containing mine waters to NH3. C1 SELMA UNIV,DIV NAT SCI,SELMA,AL 36701. LOCKHEED IDAHO TECHNOL CO,DIV BIOTECHNOL,IDAHO FALLS,ID 83415. NR 28 TC 15 Z9 16 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0175-7598 J9 APPL MICROBIOL BIOT JI Appl. Microbiol. Biotechnol. PD MAR PY 1996 VL 45 IS 1-2 BP 273 EP 277 PG 5 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA UB002 UT WOS:A1996UB00200044 PM 8920201 ER PT J AU Wang, SJ Lin, WY Chen, MN Hsieh, BT Shen, LH Tsai, ZT Ting, G Knapp, FF AF Wang, SJ Lin, WY Chen, MN Hsieh, BT Shen, LH Tsai, ZT Ting, G Knapp, FF TI Radiolabelling of lipiodol with generator-produced Re-188 for hepatic tumor therapy SO APPLIED RADIATION AND ISOTOPES LA English DT Article ID HEPATOCELLULAR-CARCINOMA; IODIZED OIL; ANTICANCER AGENTS; LIVER; INJECTION; ARTERY; CANCER AB In this study we prepared and analyzed the biodistribution of Re-188-labelled Lipiodol ([Re-188]-Lipiodol) in rats after intrahepatic arterial injection. EDTB was synthesized by condensation of 1,2-benzenediamine and ethylenediaminetetraacetic acid (EDTA). The labelling efficiency of[Re-188] Lipiodol was determined to be greater than 97% by ITLC developed with n-hexane. Following incubation of the [Re-188] Lipiodol with an equal volume of serum at 37 degrees C for 48 h, ITLC indicated good in vitro stability. Approximately 7.4 MBq [Re-188] Lipiodol was injected in each rat via the hepatic artery and samples of liver, spleen, muscle, lung, kidney, bone, whole blood and testis were obtained. [Re-188] Lipiodol tissue concentrations showed that after 1 h intrahepatic injection most of the radiotracer was retained in the liver, and was eliminated slowly with a biological half-life of 33.5 h. Radioactivity levels in the lung, kidney and blood were moderate at 1 h, and declined rapidly over time. In the spleen, muscle, testis and bone, radiation levels were insignificant. These initial results indicate that [Re-188] Lipiodol may be a potential radiopharmaceutical agent for the treatment of liver tumors. C1 NATL YANG MING MED COLL,TAIPEI 11221,TAIWAN. INST NUCL ENERGY RES,LUNGTAN 32500,TAIWAN. OAK RIDGE NATL LAB,NUCL MED GRP,OAK RIDGE,TN 37831. RP Wang, SJ (reprint author), TAICHUNG VET GEN HOSP,DEPT NUCL MED,160 SEC 3,TAICHUNG HARBOR RD,TAICHUNG,TAIWAN. NR 24 TC 24 Z9 27 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0969-8043 J9 APPL RADIAT ISOTOPES JI Appl. Radiat. Isot. PD MAR PY 1996 VL 47 IS 3 BP 267 EP 271 DI 10.1016/0969-8043(95)00300-2 PG 5 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA UM123 UT WOS:A1996UM12300001 PM 8935963 ER PT J AU Dadachova, E Smith, SV Mirzadeh, S AF Dadachova, E Smith, SV Mirzadeh, S TI Electrolytic reduction of carrier-free Re-188 SO APPLIED RADIATION AND ISOTOPES LA English DT Article ID MONOCLONAL-ANTIBODIES; TECHNETIUM; RHENIUM AB Electrolytic reduction of Re-188(7+) as an alternative to reduction with SnCl2 for protein labeling has been investigated. The electrolysis cell consisted of an ''H'' type cell with a tungsten cathode and a platinum anode, and 7 M HCl as the supporting electrolyte. Reduction of (ReO4-)-Re-188 was conducted at 25-35 V (I = 0.05-0.5 A, current density on cathode 4 x 10(-3)-4 x 10(-2) A cm(-2)) for 15 min. Ascending paper chromatography on Whatman DE81 paper in 7 M HCl at 4 degrees C confirmed that 75-77% of Re-188 was reduced to the + 5 oxidation state. Subsequent to evaporation of 7 M HCl under nitrogen, it was shown that the reduced Re-188(5+) as complexed with DMSA (meso-1,2-dimercaptosuccinic acid) or citrate at pH = 4.5 was stable with regard to reoxidation for up to 40 min. C1 OAK RIDGE NATL LAB,NUCL MED GRP,OAK RIDGE,TN 37831. RP Dadachova, E (reprint author), AUSTRALIAN NUCL SCI & TECHNOL ORG,BIOMED & HLTH PROGRAM,PMB 1,MENAI,NSW 2234,AUSTRALIA. RI Dadachova, Ekaterina/I-7838-2013 NR 20 TC 2 Z9 2 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0969-8043 J9 APPL RADIAT ISOTOPES JI Appl. Radiat. Isot. PD MAR PY 1996 VL 47 IS 3 BP 289 EP 292 DI 10.1016/0969-8043(95)00301-0 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA UM123 UT WOS:A1996UM12300005 ER PT J AU Stallard, BR Garcia, MJ Kaushik, S AF Stallard, BR Garcia, MJ Kaushik, S TI Near-TR reflectance spectroscopy for the determination of motor oil contamination in sandy loam SO APPLIED SPECTROSCOPY LA English DT Article DE near-IR spectroscopy; soil contamination; chemometrics; environmental applications of optical spectroscopy; reflectance spectroscopy; field instrumentation ID QUANTITATIVE SPECTRAL-ANALYSIS AB We have investigated the application of near-IR reflectance spectroscopy to the determination of motor oil contamination in sandy loam, Although the present work is concerned with a specific case of contamination, we discuss the possibility of applying the method to other organic contaminants and other types of soil. The spectral region considered was 1600-1900 nm, which contains the first overtone of the CH stretch. Using a commercial Fourier transform spectrometer together with cross-validated partial least-squares data analysis, the one-sigma precision for the determination of motor oil in sandy loam was 0.17 wt % (0.13 to 0.26 wt % at the 95% confidence level). The largest contribution to the precision of the determination was sampling error, or inhomogeneity in each sample. Given the precision limit imposed by the sampling error, rye found that the performance of the spectrometer could be lowered without affecting the overall precision. In a modeling exercise, adequate performance was obtained with a spectrometer having only seven spectral channels with a spectral resolution of 10 nm and a spectral noise level of 10(-3) absorbance units. A design for an inexpensive miniature instrument is presented. RP Stallard, BR (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 7 TC 28 Z9 28 U1 0 U2 3 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD MAR PY 1996 VL 50 IS 3 BP 334 EP 338 DI 10.1366/0003702963906221 PG 5 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA TZ437 UT WOS:A1996TZ43700008 ER PT J AU Niemann, RC Evans, DJ Rey, CM AF Niemann, RC Evans, DJ Rey, CM TI Thermal and electrical stabilization of high-temperature superconductor powder-in-tube conductor SO APPLIED SUPERCONDUCTIVITY LA English DT Article ID BI-2223 AB High-temperature superconductor (HTS) powder-in-tube conductors often require thermal and/or electrical stabilization to ensure their long-term integrity. An example of such a stabilization need is the safety bypass lead of an HTS current lead intended for application to superconducting magnetic energy storage (SMES) devices. The bypass lead functions include current sharing during upset conditions and conductor element temperature control. This paper presents a bypass lead design for an HTS current lead in an 0.5 MW h SMES system. Included are predictions of thermal and electrical stabilization and current lead heat leaks. The results of a supporting development program are presented as are details of a method to connect conductor element/bypass leads, an assembly procedure, a cleaning method, and thermal-stress tolerance measurements. C1 BABCOCK & WILCOX CO,NAVAL NUCL FUEL DIV,LYNCHBURG,VA 24505. RP Niemann, RC (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0964-1807 J9 APPL SUPERCOND JI Appl. Supercond. PD MAR PY 1996 VL 4 IS 3 BP 157 EP 165 DI 10.1016/S0964-1807(96)00021-X PG 9 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA WJ374 UT WOS:A1996WJ37400005 ER PT J AU Chen, CL Tsong, TT Mitchell, TE AF Chen, CL Tsong, TT Mitchell, TE TI Surface diffusion and surface atomic roughness on Ir(001) surface and terraces SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID EXCHANGE MECHANISM; REPLACEMENT; BEHAVIOR; IRIDIUM; ADATOM AB Diffusion of iridium and rhenium on Ir(001) surfaces have been studied by field ion microscopy. Self-adsorbed iridium adatoms have been found to diffuse favorably along [100] directions by an atomic exchange-replacement mechanism. Rhenium adatoms force out one of four nearest neighboring iridium substrate atoms to form Re-Ir dimer vacancy complexes at similar to 240 K, which can change orientation by 90 degrees in the temperature range from 210 to 280 K. The configuration of the Re-Ir dimer vacancy complex is considered to be the intermediate step of the atomic exchange-replacement diffusion mechanism. Unlike the diffusion of adatoms on the Ir(001) surface, ledge atoms on Ir(001) terraces diffuse only along [110] steps at low temperatures by an ordinary atomic hopping diffusion mechanism. The diffusing ledge atom is trapped at one end of the step. The barrier potential that a trapped ledge atom needs to overcome for diffusing away from the trap is found to be 0.73 eV, which is about 0.11 eV higher than the barrier for a diffusing ledge atom migrating along the step (0.62 eV). Surface step atoms start to dissociate from various sites randomly at similar to 1/6 of the melting temperature of iridium so that one-dimensional step roughening occurs. By measuring the mean square deviation of the step heights at various temperatures, the kink energy for the Ir(001) steps is found to be 1.36 eV. C1 ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN. RP Chen, CL (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. NR 16 TC 0 Z9 0 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 224 EP 230 DI 10.1016/0169-4332(95)00380-0 PG 7 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900034 ER PT J AU Babu, SS David, SA Miller, MK AF Babu, SS David, SA Miller, MK TI Microstructural development in PWA-1480 electron beam welds - An atom probe field ion microscopy study SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID BASE SUPERALLOYS; NI3AL ALLOYS; CRACKING AB The microstructural development in PWA-1480 superalloy electron beam welds (Ni-11.0at%Al-11.5%Cr-1.9%Ti-5.1%Co-4.0%Ta-1.3%W) was characterized. Optical microscopy revealed a branched dendritic structure in the weld metal. Transmission electron microscopy of these welds, in the as-welded condition, showed fine cuboidal (0.05-0.5 mu m) L1(2)-ordered gamma' precipitates within the gamma grains. The average volume percentage of the gamma' precipitates was found to be similar to 75%. Atom probe analyses revealed that the composition of the gamma matrix was Ni-4.6at%Al-25.5%Cr-0.4%Ti-9.4%Co-0.8%Ta-2.9%W and that of the gamma' precipitates was Ni-18.2at%Al-2.6%Cr-2.4%Ti-2.8%Co-7.1%Ta-1.5%W. These compositions were compared with the previous APFIM analyses of commercial PWA-1480 single crystals that had received conventional heat treatments. Small differences were found in the chromium and aluminum levels and these may be due to the nonequilibrium nature of phase transformations that occur during weld cooling. No solute segregation was detected at the gamma-gamma' interface. The APFIM results were also compared with the thermodynamic calculations of alloying element partitioning between the gamma and gamma' phases using the ThermoCalc(TM) program. RP Babu, SS (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. RI Babu, Sudarsanam/D-1694-2010 OI Babu, Sudarsanam/0000-0002-3531-2579 NR 14 TC 10 Z9 10 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 280 EP 287 DI 10.1016/0169-4332(95)00387-8 PG 8 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900042 ER PT J AU Miller, MK Anderson, IM Russell, KF AF Miller, MK Anderson, IM Russell, KF TI Precipitation and grain boundary segregation in molybdenum-doped NiAl SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI AB An atom probe field ion microscopy characterization of the precipitate and grain boundary composition of an NiAl alloy doped with 0.7 at% Mo has been performed. The microstructure of this alloy consisted of a low number density (similar to 1 to 2 x 10(21) m(-3)) of 10 to 50 nm diameter spherical Mo-(3.3 +/- 0.6)at%Al precipitates embedded in the NiAl matrix. These precipitates generate an increase in yield stress of between 82 and 210 MPa which is in good agreement with the differences in the yield stresses of the molybdenum-doped (254 MPa) and undoped alloys (154 MPa). Atom probe analysis of the B2-ordered matrix revealed extremely limited solute content of Mo and other impurities: Ni-(50.4 +/- 1.2)%Al-(0.005 +/- 0.001)%Mo, 0.007 +/- 0.002% Fe, 0.005 +/- 0.001% Si and N and 0.0004 +/- 0.0004% V. A detailed examination (> 115 000 total ions) yielded grain boundary concentrations of 0.7% Mo, 0.4% Si and N, 0.09% C, 0.04% B, and 0.02% Fe. Despite these relatively low values, the molybdenum, silicon and nitrogen, boron, and iron levels represent enrichments of similar to 140, similar to 80, similar to 85 and similar to 3 times the matrix level, respectively. The carbon level at the boundary was also significantly enriched. RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 12 TC 6 Z9 6 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 288 EP 294 DI 10.1016/0169-4332(95)00388-6 PG 7 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900043 ER PT J AU Thomson, RC Miller, MK AF Thomson, RC Miller, MK TI An atom probe study of cementite precipitation in autotempered martensite in an Fe-Mn-C alloy SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID STEEL AB Atom probe field ion microscopy has been used to determine the concentration profile of the substitutional solute element manganese through cementite particles in martensite in a ternary Fe-3Mn-0.1C (wt%) alloy. The start temperature of the martensite reaction (M(s)) in this alloy has been determined to be 380 degrees C, which is relatively high. This means that as the specimen is quenched using helium gas, after austenitising, cementite particles are able to precipitate within the martensite plates which form at or near the M(s) temperature. The atom probe results revealed that, in the case of autotempered martensite, there is no significant partitioning of the manganese between the cementite and the supersaturated ferrite matrix. C1 UNIV CAMBRIDGE,DEPT MAT SCI & MET,CAMBRIDGE CB2 3QZ,ENGLAND. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RI Thomson, Rachel/B-4217-2011 OI Thomson, Rachel/0000-0002-3681-0107 NR 14 TC 13 Z9 13 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 313 EP 319 DI 10.1016/0169-4332(95)00392-4 PG 7 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900047 ER PT J AU Pareige, PJ Russell, KF Miller, MK AF Pareige, PJ Russell, KF Miller, MK TI APFIM studies of the phase transformations in thermally aged ferritic FeCuNi alloys: Comparison with aging under neutron irradiation SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID ATOM PROBE; COPPER; PRECIPITATION AB An atom probe field ion microscopy characterization has been performed on a ternary Fe-1.28wt%Cu-1.43wt%Ni model alloy. Two sets of heat treatments at 400 and 500 degrees C were selected to follow the decomposition of the solid solution. The atom probe results suggest that the precipitation of copper from the body-centered cubic matrix involves classical nucleation, growth and coarsening processes. Nickel does not appear to be involved in these processes. The nickel and iron detected in the small particles in the early stage is rejected from the particles during subsequent growth and coarsening. The comparison of these data with those observed in neutron-irradiated pressure Vessel steels and in Fe-0.28wt%Cu-0.7wt47%Ni model steel indicates that thermal aging of ternary FeCuNi model alloys is not an appropriate process to elucidate the phase transformations in neutron-irradiated pressure vessel steels, and that the high nickel level detected in the clusters in the irradiated pressure vessel steels may be due to a ''radiation-induced'' rather than a ''radiation-enhanced'' precipitation process. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RI PAREIGE, Philippe/A-2588-2013 NR 14 TC 42 Z9 45 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 362 EP 369 DI 10.1016/0169-4332(95)00398-3 PG 8 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900054 ER PT J AU Pareige, P Miller, MK AF Pareige, P Miller, MK TI Characterization of neutron-induced copper-enriched clusters in pressure vessel steel weld: An APFIM study SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID ATOM PROBE AB Embrittlement of pressure vessel steels is controlled by complex interactions between a large number of variables making purely empirical predictions unreliable, It is necessary to have an accurate description of the changes that occur in the microstructure during neutron irradiation, A detailed atom probe field ion microscope examination of the microstructure of a neutron-irradiated commercial A533B-type weld (3.5 x 10(19) n cm(-2) (E> 1 MeV) at 283 degrees C) is reported in this study. The plane-by-plane type analysis provides an accurate description of the neutron-induced copper-enriched clusters. The size, the morphology, the spatial distribution of solutes and the chemical composition of these features are determined. The matrix chemistry of this irradiated material was determined and compared with the as-fabricated weld and weld material that had been thermally aged for 93000 h at 28O degrees C. This comparison isolated the effect of neutron irradiation from any thermally induced microstructural evolution. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RI PAREIGE, Philippe/A-2588-2013 NR 14 TC 41 Z9 42 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 370 EP 377 DI 10.1016/0169-4332(95)00399-1 PG 8 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900055 ER PT J AU Miller, MK Russell, KF AF Miller, MK Russell, KF TI APFIM characterization of a high phosphorus Russian RPV weld SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID PRESSURE-VESSEL STEELS; FIELD-ION MICROSCOPY AB A microstructural characterization of a high phosphorus (0.035 wt% P) weld from the pressure vessel of a Russian VVER nuclear reactor has been performed. The microstructure of these steels consists of intragranular and intergranular vanadium carbonitride precipitates of average composition 51.3 +/- 0.9 at% V, 18.8 +/- 0.7 at% C, 22.1 +/- 0.7 at% N, 4.9 +/- 0.4 at% Cr, 2.4 +/- 0.3 at% Mo, 0.36 +/- 0.05 at% Fe, 0.07 +/- 0.05 at% B and 0.03 +/- 0.03 at% P. The lath and grain boundaries were also coated with a thin film of molybdenum carbonitride precipitates, The phosphorus coverage at the boundaries in the unirradiated material was similar to 13% of a monolayer in agreement with predictions from the McLean model of equilibrium segregation. After neutron irradiation to a fluence of 1.15 x 10(20) n cm(-2), the phosphorus coverage had increased significantly to up to similar to 60% of a monolayer. This result indicates that neutron irradiation significantly enhanced the phosphorus segregation process. Phosphorus and copper clusters were also observed in the matrix of the neutron-irradiated material. RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 13 TC 12 Z9 15 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 378 EP 383 DI 10.1016/0169-4332(95)00400-9 PG 6 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900056 ER PT J AU Miller, MK Anderson, IM Bentley, J Russell, KF AF Miller, MK Anderson, IM Bentley, J Russell, KF TI Phase separation in the Fe-Cr-Ni system SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID DUPLEX STAINLESS-STEELS; ATOM-PROBE; APFIM AB The phase relations and microstructures of a series of isothermally aged Fe-45%Cr-5%Ni alloys have been determined with a combination of atom probe field ion microscopy, transmission electron microscopy, electron probe microanalysis and optical microscopy. The position of the miscibility gap has been determined. The phases composing the alloy varied with the isothermal ageing temperature. At the highest temperatures, 650 and 600 degrees C, only the sigma phase was observed, At the lowest temperature, 400 degrees C, the alloy was composed entirely of the alpha and alpha' phases. At intermediate temperatures, the near-surface region of the sheet was composed of the a phase and the interior of the sheet of the alpha and alpha' mixture. The morphology of the alpha' regions was a complex interconnected network structure at 400 and 500 degrees C and isolated regions at 550 degrees C. The addition of nickel to the binary Fe-45%Cr alloy was observed to raise the critical temperature of the miscibility gap and skew it to higher chromium concentrations, In the alpha end alpha' two-phase mixture, the nickel was found to partition preferentially to the cu phase, The experimental results are compared with the predictions of the Thermocalc(TM) program. RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,MICROSCOPY & MICROANALYT SCI GRP,POB 2008,OAK RIDGE,TN 37831, USA. NR 13 TC 11 Z9 11 U1 2 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 391 EP 397 DI 10.1016/0169-4332(95)00402-5 PG 7 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900058 ER PT J AU Miller, MK Russell, KF AF Miller, MK Russell, KF TI Comparison of the rate of decomposition in Fe-45%Cr, Fe-45%Cr-5%Ni and duplex stainless steels SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID ATOM-PROBE; PHASE; CR; NI AB A comparison has been made of the rate of decomposition of the ferrite in an Fe-45%Cr, Fe-45%Cr-5%Ni and the ferrite phase of two CF 3 duplex stainless steels during long term ageing at 400 degrees C. In all these stems, the ferrite phase decomposes upon ageing to form an ultrafine-scale interconnected network structure of an iron-rich alpha phase and alpha chromium-enriched alpha' phase. The addition of nickel to the binary Fe-45%Cr alloy significantly increases the hardness of the alloy and also accelerates the kinetics of decomposition. Although the hardness data from the ternary alloys are similar to those of the ferrite phase in the duplex stainless steels, significant differences were also observed in the scale and composition amplitudes of the alpha and alpha' phases. RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 13 TC 15 Z9 15 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 398 EP 402 DI 10.1016/0169-4332(95)00403-3 PG 5 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900059 ER PT J AU Chan, DK Seidman, DN Merkle, KL AF Chan, DK Seidman, DN Merkle, KL TI The chemistry and structure of {222}CdO/Ag heterophase interfaces on an atomic scale SO APPLIED SURFACE SCIENCE LA English DT Article; Proceedings Paper CT 42nd International Field Emission Symposium CY AUG 07-11, 1995 CL MADISON, WI ID METAL; HYDROGEN; GROWTH AB The chemistry and structure of {222} CdO/Ag (ceramic/metal) heterophase interfaces are determined with sub-nanometer chemical and structural spatial resolution employing atom-probe field-ion and high-resolution electron microscopies. The interfaces are produced in a controlled manner via internal oxidation of a Ag-1.62at%Cd alloy, which results in the formation of CdO precipitates in a Ag matrix. The CdO precipitates are octahedral-shaped with facets on the {222} polar planes, and have a cube-on-cube orientation relationship with the Ag matrix. Atom-probe analyses are made along the chemically-ordered CdO [111]-type directions, thereby perpendicularly intersecting the {222} interfaces. A total of 35 {222} heterophase interfaces is chemically analyzed, of which 19 have the chemical sequence Ag\O\Cd\... and 16 the sequence Ag\Cd\O\.... High resolution electron microscopy analyses reveal that the {222} facet planes of the CdO precipitates contain atomic height ledges, therefore indicating that the preciptates were in a coarsening stage. The combined atom-probe and high-resolution electron microscope results demonstrate that the chemistry of the terminating {222} facet plane of CdO is controlled by coarsening kinetics. C1 NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208. NORTHWESTERN UNIV,MAT RES CTR,EVANSTON,IL 60208. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RI Seidman, David/B-6697-2009 NR 33 TC 3 Z9 3 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0169-4332 J9 APPL SURF SCI JI Appl. Surf. Sci. PD MAR PY 1996 VL 94-5 BP 409 EP 415 DI 10.1016/0169-4332(95)00404-1 PG 7 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA UT169 UT WOS:A1996UT16900061 ER PT J AU Christian, JE Kosny, J AF Christian, JE Kosny, J TI Thermal performance and wall ratings SO ASHRAE JOURNAL-AMERICAN SOCIETY OF HEATING REFRIGERATING AND AIR-CONDITIONING ENGINEERS LA English DT Article RP Christian, JE (reprint author), US DOE,BLDG TECHNOL CTR,BLDG ENVELOPE SYST & MAT PROGRAM,WASHINGTON,DC 20585, USA. NR 20 TC 4 Z9 4 U1 0 U2 2 PU AMER SOC HEAT REFRIG AIR- CONDITIONING ENG INC PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 SN 0001-2491 J9 ASHRAE J JI ASHRAE J.-Am. Soc. Heat Refrig. Air-Cond. Eng. PD MAR PY 1996 VL 38 IS 3 BP 56 EP & PG 8 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA TZ417 UT WOS:A1996TZ41700014 ER PT J AU Alcock, C Allsman, RA Axelrod, TS Bennett, DP Cook, KH Freeman, KC Griest, K Marshall, SL Peterson, BA Pratt, MR Quinn, PJ Rodgers, AW Stubbs, CW Sutherland, S Welch, DL AF Alcock, C Allsman, RA Axelrod, TS Bennett, DP Cook, KH Freeman, KC Griest, K Marshall, SL Peterson, BA Pratt, MR Quinn, PJ Rodgers, AW Stubbs, CW Sutherland, S Welch, DL TI The macho project LMC variable star inventory .2. LMC RR lyrae stars - Pulsational characteristics and indications of a global youth of the LMC SO ASTRONOMICAL JOURNAL LA English DT Article ID GALACTIC GLOBULAR-CLUSTERS; COLOR-MAGNITUDE DIAGRAM; LARGE MAGELLANIC CLOUD; FOURIER COEFFICIENTS; ABSOLUTE MAGNITUDES; HORIZONTAL-BRANCH; PHOTOMETRY; HALO; M15; AGE AB The Macho Project Year One Database contains photometric observations of twenty-two 40 arcmin fields in the bar region of the LMC which are analyzed to select stars with the properties of LMC field RR Lyrae stars. The resulting set of similar to 7900 stars, in the range of brightness 18.7