FN Thomson Reuters Web of Science™ VR 1.0 PT J AU FRYBERGER, TB AF FRYBERGER, TB TI RADIONUCLIDE SEPARATIONS AND PROCESSING FOR DEFENSE WASTE MANAGEMENT SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,WASHINGTON,DC 20585. 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 AUG 22 PY 1993 VL 206 BP 67 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200819 ER PT J AU RAI, G AF RAI, G TI 1ST RESULTS FROM THE EOS PROGRAM AT LBL SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 67 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200065 ER PT J AU HUBER, VJ KOSHTI, N GOPALAN, AA JARVINEN, GD SMITH, PH AF HUBER, VJ KOSHTI, N GOPALAN, AA JARVINEN, GD SMITH, PH TI SELECTIVE CHELATORS FOR ACTINIDE COMPLEXATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NEW MEXICO STATE UNIV,DEPT CHEM,LAS CRUCES,NM 88003. 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 AUG 22 PY 1993 VL 206 BP 68 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200820 ER PT J AU KATZ, JJ AF KATZ, JJ TI PLUTONIUM AND THE ATOM BOMB - BORN IN SIN SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 68 EP CHED PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100694 ER PT J AU PEILERT, G AF PEILERT, G TI MULTI-FRAGMENTATION FROM SIS/LBL TO AGS ENERGIES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 68 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200066 ER PT J AU FELLER, D GLENDENING, ED AF FELLER, D GLENDENING, ED TI AN AB-INITIO STUDY OF THE SELECTIVE BINDING OF ALKALI-METAL CATIONS TO 18-CROWN-6 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 69 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200821 ER PT J AU RIVARD, C MOENS, L ROBERTS, K BRIGHAM, J KELLEY, S AF RIVARD, C MOENS, L ROBERTS, K BRIGHAM, J KELLEY, S TI STARCH ESTERS AS BIODEGRADABLE PLASTICS - EFFECTS OF ESTER GROUP CHAIN-LENGTH AND DEGREE OF SUBSTITUTION ON ANAEROBIC BIODEGRADATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,APPL BIOL SCI BRANCH,GOLDEN,CO 80401. NATL RENEWABLE ENERGY LAB,CHEM TECHNOL RES BRANCH,GOLDEN,CO 80401. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 69 EP CELL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100617 ER PT J AU ANDERSON, KB AF ANDERSON, KB TI EVIDENCE FOR A NEW STRUCTURAL SUBCLASS OF RESINITE IN MIDDLE AND UPPER CRETACEOUS AMBER FROM THE TAIMYR PENINSULA, SIBERIA SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60532. 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 AUG 22 PY 1993 VL 206 BP 70 EP GEOC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101702 ER PT J AU FOWLER, JS VOLKOW, ND WOLF, AP AF FOWLER, JS VOLKOW, ND WOLF, AP TI PET AND DRUG RESEARCH SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 72 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200070 ER PT J AU BILTOFT, PJ WOLTERS, F AF BILTOFT, PJ WOLTERS, F TI METHODS FOR REDUCING DATA FROM A FIBEROPTIC BASED TCE SENSOR SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CLOROX TECH CTR,PLEASANTON,CA 94588. 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 AUG 22 PY 1993 VL 206 BP 73 EP ENVR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101441 ER PT J AU CARRADO, KA AF CARRADO, KA TI THE DIRECT SYNTHESIS OF ORGANIC AND ORGANOMETALLIC-CONTAINING MICA-TYPE ALUMINOSILICATES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM 200,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 AUG 22 PY 1993 VL 206 BP 74 EP PETR PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200695 ER PT J AU KUCERA, GH BROWN, AP ROCHE, MF KRUMPELT, M AF KUCERA, GH BROWN, AP ROCHE, MF KRUMPELT, M TI CATHODE MATERIALS FOR THE MOLTEN-CARBONATE FUEL-CELL SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 76 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101592 ER PT J AU WALTON, BT HOYLMAN, AM CHRISTMAN, RF AF WALTON, BT HOYLMAN, AM CHRISTMAN, RF TI PLANT DEFENSES AGAINST TOXIC-SUBSTANCES IN SOILS - IMPLICATIONS FOR IN-SITU BIOREMEDIATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. UNIV TENNESSEE,GRAD PROGRAM SPEECH,KNOXVILLE,TN 37996. UNIV N CAROLINA,DEPT ENVIRONM SCI & ENGN,CHAPEL HILL,NC 27599. 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 AUG 22 PY 1993 VL 206 BP 77 EP AGRO PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100247 ER PT J AU WILLIAMS, MC ARCHER, D WIMER, J SUDHOFF, F AF WILLIAMS, MC ARCHER, D WIMER, J SUDHOFF, F TI MATHEMATICAL-MODELING OF MCFC NETWORKS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26505. 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 AUG 22 PY 1993 VL 206 BP 78 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101594 ER PT J AU KELLER, RA AF KELLER, RA TI APPLICATIONS OF SINGLE-MOLECULE DETECTION TO DNA-SEQUENCING AND SIZING 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 AUG 22 PY 1993 VL 206 BP 79 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100415 ER PT J AU VISSERS, DR DELUCA, WH HENRIKSEN, GL AF VISSERS, DR DELUCA, WH HENRIKSEN, GL TI ADVANCED BATTERIES FOR ELECTRIC VEHICLE APPLICATIONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 3 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 79 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101595 ER PT J AU BEENE, JR AF BEENE, JR TI PROBING THE NUCLEAR MULTIPOLE RESPONSE WITH INTERMEDIATE-ENERGY HEAVY-IONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 80 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200078 ER PT J AU LEE, IY AF LEE, IY TI CONTINUUM GAMMA-RAY STUDIES ON ND-135 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 81 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200079 ER PT J AU NEWTON, MD AF NEWTON, MD TI LONG-RANGE COUPLING OF LOCAL DONOR-ACCEPTOR SITES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 81 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200833 ER PT J AU EIDEN, GC CISPER, ME ALEXANDER, ML HEMBERGER, PH NOGAR, NS AF EIDEN, GC CISPER, ME ALEXANDER, ML HEMBERGER, PH NOGAR, NS TI DYNAMIC TRAPPING OF LASER-GENERATED IONS IN AN ION-TRAP MASS-SPECTROMETER 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 AUG 22 PY 1993 VL 206 BP 82 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100418 ER PT J AU SCHERSON, D SUNGHYUN, K TRYK, D AF SCHERSON, D SUNGHYUN, K TRYK, D TI APPLICATIONS OF X-RAY-ABSORPTION FINE-STRUCTURE (XAFS) TO THE STUDY OF ELECTROCHEMICAL SYSTEMS OF RELEVANCE TO ENERGY-STORAGE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 CASE WESTERN RESERVE UNIV,DEPT CHEM,CLEVELAND,OH 44106. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RI Tryk, Donald/D-5931-2012 OI Tryk, Donald/0000-0003-4660-9674 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 AUG 22 PY 1993 VL 206 BP 83 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101598 ER PT J AU GONIN, M AF GONIN, M TI REVIEW OF DATA FROM AGS EXPERIMENT AT BROOKHAVEN - HADRON SPECTRA IN ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 84 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200082 ER PT J AU DEMIR, I LIZZIO, AA FULLER, EL HARVEY, RD AF DEMIR, I LIZZIO, AA FULLER, EL HARVEY, RD TI EVALUATION OF THE SURFACE-PROPERTIES OF ILLINOIS BASIN COALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ILLINOIS STATE GEOL SURVEY,CHAMPAIGN,IL 61820. 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 AUG 22 PY 1993 VL 206 BP 85 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101600 ER PT J AU TONSE, SR AF TONSE, SR TI SPECTRA OF TARGET FRAGMENTS FROM RELATIVISTIC NUCLEUS-NUCLEUS COLLISIONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 86 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200084 ER PT J AU BLOOMER, MA AF BLOOMER, MA TI WHAT WE HAVE LEARNED FROM HEAVY-ION COLLISIONS AT THE CERN SPS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 87 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200085 ER PT J AU MILLER, JA AF MILLER, JA TI HOW NO(X) IS FORMED IN COMBUSTION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,COMBUST RES FACIL,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 AUG 22 PY 1993 VL 206 BP 87 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200839 ER PT J AU FAULQUES, E PERRY, DL AF FAULQUES, E PERRY, DL TI PHONONS STUDY OF BIS-THIOUREA LEAD(II) CHLORIDE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 INST MAT NANTES,LPC,F-44072 NANTES,FRANCE. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 90 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101909 ER PT J AU HUNT, JE JOSEPH, JT WINANS, RE AF HUNT, JE JOSEPH, JT WINANS, RE TI ELUCIDATION OF LARGE HETEROATOM CONTAINING MOLECULES IN PETROLEUM RESIDUA BY MASS-SPECTROMETRY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 AMOCO RES CTR,AMOCO OIL RES & DEV DEPT,NAPERVILLE,IL 60566. 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 AUG 22 PY 1993 VL 206 BP 90 EP GEOC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101722 ER PT J AU YEUNG, ES AF YEUNG, ES TI ULTRA-TRACE AND ULTRA-MICRO SPECTROCHEMICAL ANALYSIS BASED ON LASERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,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 AUG 22 PY 1993 VL 206 BP 92 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100428 ER PT J AU JELINEK, R PINES, A OZIN, GA AF JELINEK, R PINES, A OZIN, GA TI MONITORING CHEMICAL PROCESSES IN ZEOLITES BY NA-23 DOUBLE-ROTATION NMR SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. UNIV TORONTO,DEPT CHEM,TORONTO M5S 1A1,ONTARIO,CANADA. 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 AUG 22 PY 1993 VL 206 BP 93 EP PETR PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200714 ER PT J AU KUMAR, R AHMED, S YU, M AF KUMAR, R AHMED, S YU, M TI FUEL PROCESSING REQUIREMENTS AND TECHNIQUES FOR FUEL-CELL PROPULSION POWER SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 94 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101607 ER PT J AU NICOLIS, NG BARRETO, J SARANTITES, DG CHARITY, RJ SOBOTKA, LG STRACENER, D HENSLEY, DC BEENE, JR HALBERT, ML BAKTASH, C AF NICOLIS, NG BARRETO, J SARANTITES, DG CHARITY, RJ SOBOTKA, LG STRACENER, D HENSLEY, DC BEENE, JR HALBERT, ML BAKTASH, C TI THE DECAY OF YB-164 ASTERISK FORMED FUSION REACTIONS INVOLVING ASYMMETRIC AND NEARLY SYMMETRICAL ENTRANCE CHANNELS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 WASHINGTON UNIV,ST LOUIS,MO 63130. 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 AUG 22 PY 1993 VL 206 BP 96 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200094 ER PT J AU UDOMSAK, S ANTHONY, RG DOSCH, RG AF UDOMSAK, S ANTHONY, RG DOSCH, RG TI SYNTHESIS AND CATALYTIC ACTIVITY OF SILICA PILLARED TYPE-2 TITANATE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 TEXAS A&M UNIV SYST,DEPT CHEM ENGN,COLL STN,TX 77843. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 97 EP PETR PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200718 ER PT J AU DAVIDS, CN AF DAVIDS, CN TI GAMMA-RAY EXPERIMENTS AT THE FRAGMENT MASS ANALYZER SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV PHYS,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 AUG 22 PY 1993 VL 206 BP 98 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200096 ER PT J AU THOMPSON, JA FORD, DK REILLY, SD BARR, ME SMITH, PH AF THOMPSON, JA FORD, DK REILLY, SD BARR, ME SMITH, PH TI SOLUTION AND SOLID-STATE STRUCTURAL COMPARISON OF OCATA-AZA CRYTPAND METAL-COMPLEXES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 100 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101919 ER PT J AU DAVIDS, CN AF DAVIDS, CN TI RADIOACTIVE BEAMS AT THE FRAGMENT MASS ANALYZER SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV PHYS,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 AUG 22 PY 1993 VL 206 BP 102 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200100 ER PT J AU GARRETT, BC SCHENTER, GK MCRAE, RP AF GARRETT, BC SCHENTER, GK MCRAE, RP TI DYNAMIC SOLVENT EFFECTS ON TUNNELING IN CHEMICAL-REACTIONS - A VARIATIONAL TRANSITION-STATE THEORY STUDY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RI Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 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 AUG 22 PY 1993 VL 206 BP 102 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200854 ER PT J AU FAULON, JL CARLSON, GA MATHEWS, JP HATCHER, PG AF FAULON, JL CARLSON, GA MATHEWS, JP HATCHER, PG TI STATISTICAL EVALUATION OF PHYSICAL-PROPERTIES FOR COAL MACROMOLECULES BASED ON COMPUTER-GENERATED STRUCTURES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PENN STATE UNIV,UNIV PK,PA 16802. SANDIA NAT LABS,ALBUQUERQUE,NM 87110. 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 AUG 22 PY 1993 VL 206 BP 103 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101615 ER PT J AU SCHUR, A AF SCHUR, A TI USING VISUAL CUES IN YOUR NOTEBOOK SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 104 EP COMP PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101357 ER PT J AU OLSEN, DK AF OLSEN, DK TI STATUS-REPORT OF THE ORNL RIB PROJECT SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 106 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200104 ER PT J AU CODY, GD BOTTO, RE AF CODY, GD BOTTO, RE TI NMR IMAGING OF ANOMALOUS SOLVENT TRANSPORT IN MACROMOLECULAR MATERIALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 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 AUG 22 PY 1993 VL 206 BP 108 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101620 ER PT J AU VANBROCKLIN, HF PADGETT, HC ALVORD, CW SCHMIDT, DG BIDA, GT AF VANBROCKLIN, HF PADGETT, HC ALVORD, CW SCHMIDT, DG BIDA, GT TI HIGH-PRESSURE (H2O)-O-18 TARGET FOR THE PRODUCTION OF [F-18] FLUORIDE-ION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NO CALIF PET IMAGING CTR,SACRAMENTO,CA 95816. CTI INC,KNOXVILLE,TN 37933. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. 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 AUG 22 PY 1993 VL 206 BP 109 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200106 ER PT J AU NIKSA, S KERSTEIN, AR AF NIKSA, S KERSTEIN, AR TI MODELING THE RATES AND YIELDS OF DEVOLATILIZATION FROM VARIOUS COALS WITH FLASHCHAIN SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SRI INT,MOLEC PHYS LAB,MENLO PK,CA 94025. SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550. 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 AUG 22 PY 1993 VL 206 BP 110 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101622 ER PT J AU BARNHART, DM CLARK, DL GORDON, JC HUFFMAN, JC WATKIN, JG AF BARNHART, DM CLARK, DL GORDON, JC HUFFMAN, JC WATKIN, JG TI THORIUM ALKOXIDE CHEMISTRY - PREPARATION AND STRUCTURAL STUDIES OF THORIUM TETRAKIS (DI-ISO-PROPYLMETHOXIDE) AND ITS LEWIS BASE ADDUCTS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,INORGAN & STRUCT CHEM GRP,LOS ALAMOS,NM 87545. INDIANA UNIV,CTR MOLEC STRUCT,BLOOMINGTON,IN 47405. UNIV WASHINGTON,DEPT CHEM,SEATTLE,WA 98195. 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 AUG 22 PY 1993 VL 206 BP 111 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101930 ER PT J AU GORDON, PL SAUER, NN BURNS, CJ WATKIN, JG VANDERSLUYS, WG AF GORDON, PL SAUER, NN BURNS, CJ WATKIN, JG VANDERSLUYS, WG TI PREPARATION AND CHARACTERIZATION OF URANIUM ALKOXIDES THROUGH OXIDATION OF URANIUM METAL SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV ISOTOPE & NUCL CHEM,INORGAN & STRUCT CHEM GRP,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 AUG 22 PY 1993 VL 206 BP 112 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101931 ER PT J AU CAUSGROVE, TP DYER, RB AF CAUSGROVE, TP DYER, RB TI ULTRAFAST PROTEIN DYNAMICS FOLLOWING PHOTOLYSIS OF CARBOXYMOGLOBIN SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,PHOTOCHEM & PHOTOPHYS GRP,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 AUG 22 PY 1993 VL 206 BP 117 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200869 ER PT J AU CASTEN, RF AF CASTEN, RF TI THE STATUS OF THE ISL INITIATIVE AND ITS SCIENTIFIC PROMISE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 121 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200118 ER PT J AU FOX, GA BALAZS, GB GLASS, RS AF FOX, GA BALAZS, GB GLASS, RS TI SYNTHESIS OF FUNCTIONALIZED MACROCYCLIC COMPLEXES FOR ELECTROCHEMICAL ANALYSIS OF METAL-ION CONCENTRATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. 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 AUG 22 PY 1993 VL 206 BP 121 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101940 ER PT J AU BAKTASH, C AF BAKTASH, C TI EARLY SPECTROSCOPY EXPERIMENTS WITH RIB AT ORNL - PLANS, TECHNIQUES, AND DETECTORS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 123 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200120 ER PT J AU WIEDERRECHT, GP WASIELEWSKI, MR AF WIEDERRECHT, GP WASIELEWSKI, MR TI ULTRAFAST SOLVATION DYNAMICS OF MULTISTEP ELECTRON-TRANSFER IN CHLOROPHYLLPORPHYRIN-ACCEPTOR TRIADS 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 AUG 22 PY 1993 VL 206 BP 123 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200875 ER PT J AU JENTZ, D BARBIERI, A HELD, G VANHOVE, M SOMORJAI, G AF JENTZ, D BARBIERI, A HELD, G VANHOVE, M SOMORJAI, G TI SURFACE-STRUCTURE DETERMINATIONS OF ORDERED SULFUR OVERLAYERS ON RE(0001) - A TENSOR LEED ANALYSIS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 126 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101154 ER PT J AU TOTH, KS AF TOTH, KS TI DELINEATION OF THE PROTON DRIP-LINE WITH THE USE OF BEAMS FROM THE OAK-RIDGE-RIB-FACILITY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 126 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200123 ER PT J AU LUANGDILOK, CH MEISEL, D AF LUANGDILOK, CH MEISEL, D TI RADICAL IONS AT THE SURFACE OF SEMICONDUCTOR PARTICLES 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 AUG 22 PY 1993 VL 206 BP 130 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101158 ER PT J AU KARTHA, S KAPOOR, S ZHANG, YN MICIC, OI THURNAUER, MC MEISEL, D AF KARTHA, S KAPOOR, S ZHANG, YN MICIC, OI THURNAUER, MC MEISEL, D TI EPR AND PULSE-RADIOLYSIS STUDIES OF ELECTRON-TRANSFER IN TRANSITION-METAL DITHIOLENES AT THE SURFACE OF COLLOIDAL TIO2 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 131 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101159 ER PT J AU KEPLEY, LJ BARD, AJ AF KEPLEY, LJ BARD, AJ TI USE OF IN-SITU ELLIPSOMETRY TO DETERMINE MODE OF CHARGE-TRANSPORT AND CHANGES IN SOLVENT SWELLING DURING ELECTROCHEMICAL CONVERSION OF ELECTROACTIVE POLYMER-FILMS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV TEXAS,DEPT CHEM,AUSTIN,TX 78712. 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 AUG 22 PY 1993 VL 206 BP 135 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100471 ER PT J AU OGILBY, PR KRISTIANSEN, M MARTIRE, DO SCURLOCK, RD TAYLOR, VL CLOUGH, RL AF OGILBY, PR KRISTIANSEN, M MARTIRE, DO SCURLOCK, RD TAYLOR, VL CLOUGH, RL TI THE FORMATION AND REMOVAL OF SINGLET (1-DELTA(G))-OXYGEN IN SOLID ORGANIC POLYMERS - EVENTS THAT MAY INFLUENCE POLYMER PHOTODEGRADATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV NEW MEXICO,DEPT CHEM,ALBUQUERIQUE,NM 87185. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. 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 AUG 22 PY 1993 VL 206 BP 136 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201148 ER PT J AU BAKTASH, C CULLEN, DM GARRETT, JD GROSS, CJ JOHNSON, NR SARANTITES, DG SIMPSON, J AF BAKTASH, C CULLEN, DM GARRETT, JD GROSS, CJ JOHNSON, NR SARANTITES, DG SIMPSON, J TI SUPERDEFORMATION AND BAND TERMINATION IN SR-82 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. WASHINGTON UNIV,ST LOUIS,MO 63130. SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. 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 AUG 22 PY 1993 VL 206 BP 137 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200134 ER PT J AU HOUK, RS CHEN, X ALLEN, L WARREN, AR ALVES, L SHUM, SCK AF HOUK, RS CHEN, X ALLEN, L WARREN, AR ALVES, L SHUM, SCK TI FUTURE-PROSPECTS FOR INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,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 AUG 22 PY 1993 VL 206 BP 138 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100474 ER PT J AU PERRY, DL ZUBKOWSKI, JD AF PERRY, DL ZUBKOWSKI, JD TI X-RAY AND SPECTROSCOPIC CHARACTERIZATION OF COBALT-EDTA COMPLEXES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. JACKSON STATE UNIV,DEPT CHEM,JACKSON,MS 39217. 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 AUG 22 PY 1993 VL 206 BP 138 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101957 ER PT J AU LOTT, S ZUBKOWSKI, JD VALENTE, EJ PERRY, DL AF LOTT, S ZUBKOWSKI, JD VALENTE, EJ PERRY, DL TI CRYSTAL AND MOLECULAR-STRUCTURE STUDIES OF [CO(H2O)6[2+[CO(H2O)HEDTA](2)-.2H2O AND [CO(H2O)HEDTA].2H2O SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 MISSISSIPPI COLL,DEPT CHEM,CLINTON,MS 39056. JACKSON STATE UNIV,DEPT CHEM,JACKSON,MS 39217. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 139 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101958 ER PT J AU DAGOSTINO, AT AF DAGOSTINO, AT TI STABILITY OF THE UHV PREPARED RECONSTRUCTED SURFACE OF AU (100) - LOW-ENERGY-ELECTRON DIFFRACTION AND ELECTROCHEMICAL ANALYSIS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV S FLORIDA,DEPT CHEM,TAMPA,FL 33620. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 141 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200893 ER PT J AU BLATTER, F FREI, H AF BLATTER, F FREI, H TI PHOTOOXIDATION OF SMALL ALKENES IN FAUJASITE-TYPE ZEOLITES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,CHEM BIODYNAM 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 AUG 22 PY 1993 VL 206 BP 142 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200894 ER PT J AU COOKS, RG WILLIAMS, JD CLEVEN, CD HEMBERGER, PH NOGAR, NS CISPER, ME SYKA, JEP AF COOKS, RG WILLIAMS, JD CLEVEN, CD HEMBERGER, PH NOGAR, NS CISPER, ME SYKA, JEP TI SPATIAL AND TEMPORAL DISTRIBUTIONS OF IONS IN ELECTROMAGNETIC-FIELDS - ION TOMOGRAPHY IN QUADRUPOLE ION-TRAP MASS SPECTROMETERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PURDUE UNIV,DEPT CHEM,W LAFAYETTE,IN 47907. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. FINNIGAN MAT CORP,SAN JOSE,CA 95134. RI Cooks, R/G-1051-2015 OI Cooks, R/0000-0002-9581-9603 NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 142 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100478 ER PT J AU SMITH, RD HOFSTADLER, SA WAHL, JH BRUCE, JE AF SMITH, RD HOFSTADLER, SA WAHL, JH BRUCE, JE TI CAPILLARY ELECTROPHORESIS COMBINED WITH HIGH-RESOLUTION AND HIGH-SENSITIVITY ELECTROSPRAY-IONIZATION MASS-SPECTROMETRY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 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 AUG 22 PY 1993 VL 206 BP 143 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100479 ER PT J AU JOHNSON, DC KAWAGOE, KT GORDON, JS AF JOHNSON, DC KAWAGOE, KT GORDON, JS TI INORGANIC MODIFICATION OF LEAD DIOXIDE ELECTRODES FOR ELECTROCATALYSIS OF ANODIC OXYGEN-TRANSFER REACTIONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. 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 AUG 22 PY 1993 VL 206 BP 145 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101173 ER PT J AU SMALLEY, JF FELDBERG, SW NEWTON, MD CHIDSEY, CED AF SMALLEY, JF FELDBERG, SW NEWTON, MD CHIDSEY, CED TI AN INDIRECT LASER-INDUCED TEMPERATURE-JUMP STUDY OF THE ELECTRON-TRANSFER KINETICS OF SURFACE-ATTACHED FERROCENE ACROSS GOLD ELECTROLYTE INTERFACES MODIFIED WITH ALKYL THIOL, SELF-ASSEMBLED MONOLAYERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. STANFORD UNIV,DEPT CHEM,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 AUG 22 PY 1993 VL 206 BP 148 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101176 ER PT J AU HOUSTON, JE MICHALSKE, TA THOMAS, RC CROOKS, RM JOYCE, SA AF HOUSTON, JE MICHALSKE, TA THOMAS, RC CROOKS, RM JOYCE, SA TI MECHANICAL RELAXATION OF ORGANIC MONOLAYER FILMS MEASURED BY INTERFACIAL FORCE MICROSCOPY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. UNIV NEW MEXICO, DEPT CHEM, ALBUQUERQUE, NM 87131 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 152 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201164 ER PT J AU WACKER, JF AF WACKER, JF TI MASS-SPECTROMETRIC ANALYSIS OF ISOTOPE RATIOS IN SINGLE PARTICLES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 153 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100489 ER PT J AU YANG, M DALE, JM WHITTEN, WB RAMSEY, JM AF YANG, M DALE, JM WHITTEN, WB RAMSEY, JM TI OPTICAL AND MASS-SPECTROMETRY OF INDIVIDUAL MICROPARTICLES IN ELECTRODYNAMIC TRAPS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV ANALYT CHEM,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 AUG 22 PY 1993 VL 206 BP 154 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100490 ER PT J AU CONOVER, EW STOUT, BE HELMER, B ELDER, RC CLARK, SB AF CONOVER, EW STOUT, BE HELMER, B ELDER, RC CLARK, SB TI SPECIATION OF U(VI) IN AQUEOUS CARBONATE SOLUTIONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract ID C-13 C1 UNIV GEORGIA,SREL,AIKEN,SC. UNIV CINCINNATI,DEPT CHEM,CINCINNATI,OH 45221. NR 2 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 158 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200155 ER PT J AU NITSCHKE, JM AF NITSCHKE, JM TI TECHNICAL ISSUES AT THE ISOSPIN LABORATORY (ISL) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. 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 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 160 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200157 ER PT J AU NOLEN, JA AF NOLEN, JA TI SOME THOUGHTS ON PRODUCTION MECHANISMS AND TARGETRY FOR RADIOACTIVE BEAMS VIA THE ISOL TECHNIQUE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV PHYS,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 AUG 22 PY 1993 VL 206 BP 161 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200158 ER PT J AU VIEIRA, DJ WOUTERS, JM ROSENAUER, D TALBERT, WL KIMBERLY, HJ GRISHAM, DL AF VIEIRA, DJ WOUTERS, JM ROSENAUER, D TALBERT, WL KIMBERLY, HJ GRISHAM, DL TI A HIGH-INTENSITY HE-JET PRODUCTION SOURCE FOR RADIOACTIVE BEAMS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,HE JET COLLABORAT,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 AUG 22 PY 1993 VL 206 BP 162 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200159 ER PT J AU AGRAWAL, G WOOL, RP DOZIER, WD FELCHER, GP MAYS, JW RUSSELL, TP AF AGRAWAL, G WOOL, RP DOZIER, WD FELCHER, GP MAYS, JW RUSSELL, TP TI STRUCTURE OF WELDED SYMMETRICAL POLYMER INTERFACES WITH REPTATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801. ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV ALABAMA,DEPT CHEM,BIRMINGHAM,AL 35294. IBM CORP,ARC,SAN JOSE,CA 95114. 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 AUG 22 PY 1993 VL 206 BP 163 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201175 ER PT J AU JAMISON, GM LOY, DA SHEA, KJ AF JAMISON, GM LOY, DA SHEA, KJ TI NEW GROUP-XIV OXIDE MATERIALS - POLYGERM AND POLYGERMSILSESQUIOXANES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,DEPT PROPERTIES ORGAN MAT,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 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 AUG 22 PY 1993 VL 206 BP 168 EP PMSE PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201620 ER PT J AU ONG, EW ECKERT, J DOTSON, LA GLAUNSINGER, WS AF ONG, EW ECKERT, J DOTSON, LA GLAUNSINGER, WS TI DISTINGUISHABLE AMMONIA SPECIES IN ALKALINE EARTH-AMMONIA INTERCALATED TITANIUM DISULFIDE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. ARIZONA STATE UNIV,DEPT CHEM,TEMPE,AZ 85287. 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 AUG 22 PY 1993 VL 206 BP 174 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101993 ER PT J AU GARRETT, JD OLSEN, DK RAYBURN, L AF GARRETT, JD OLSEN, DK RAYBURN, L TI POSSIBLE NEW RADIOACTIVE BEAM INITIATIVES AT OAK-RIDGE-NATIONAL-LABORATORY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE INST SCI & EDUC,UNISOR,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. 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 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 177 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200174 ER PT J AU MCCLELLAND, JB AF MCCLELLAND, JB TI OVERVIEW OF FUTURE POSSIBILITIES FOR A RADIOACTIVE BEAMS FACILITY AT LAMPF 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 AUG 22 PY 1993 VL 206 BP 178 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200175 ER PT J AU NITSCHKE, JM AF NITSCHKE, JM TI FUTURE POSSIBILITIES FOR RADIOACTIVE NUCLEAR BEAMS AT LAWRENCE-BERKELEY-LABORATORY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 179 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200176 ER PT J AU GREENFIELD, SR GOSZTOLA, D WASIELEWSKI, MR AF GREENFIELD, SR GOSZTOLA, D WASIELEWSKI, MR TI NOVEL ULTRAFAST SUPRAMOLECULAR ELECTRON-TRANSFER SYSTEMS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RI Gosztola, David/D-9320-2011 OI Gosztola, David/0000-0003-2674-1379 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 AUG 22 PY 1993 VL 206 BP 180 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200932 ER PT J AU GOSZTOLA, D GREENFIELD, S WASIELEWSKI, MR AF GOSZTOLA, D GREENFIELD, S WASIELEWSKI, MR TI AN INVESTIGATION OF EFFICIENT INTRAMOLECULAR CHARGE SEPARATION IN A SERIES OF DONOR-ACCEPTOR MOLECULES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RI Gosztola, David/D-9320-2011 OI Gosztola, David/0000-0003-2674-1379 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 AUG 22 PY 1993 VL 206 BP 181 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200933 ER PT J AU MESSINA, M SCHENTER, GK GARRETT, BC AF MESSINA, M SCHENTER, GK GARRETT, BC TI A QUANTUM-MECHANICAL STUDY OF THE DIFFUSION RATES OF HYDROGEN, DEUTERIUM, AND MUONIUM IN ICE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RI Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 2 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 205 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200957 ER PT J AU BURRELL, AK BRYAN, JC CLARK, L SATTELBERGER, AP AF BURRELL, AK BRYAN, JC CLARK, L SATTELBERGER, AP TI SYNTHESIS AND REACTIVITY OF TECHNETIUM IMIDO COMPLEXES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,INORGAN & STRUCT CHEM GRP INC1,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 AUG 22 PY 1993 VL 206 BP 208 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102027 ER PT J AU CHISHOLM, MH WESEMANN, JL JAMES, CA AF CHISHOLM, MH WESEMANN, JL JAMES, CA TI SOLUTION STUDIES OF THE EFFECT OF AXIAL LIGANDS ON THE GROUND AND EXCITED-STATE ELECTRONIC CONFIGURATIONS OF RU2OCT4 (OCT = O2C(CH2)6CH3) SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405. LOS ALAMOS NATL LAB,INC 14,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 AUG 22 PY 1993 VL 206 BP 213 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102032 ER PT J AU DANG, LX GARRETT, BC AF DANG, LX GARRETT, BC TI PHOTOELECTRON-SPECTRA OF SOLVATED ANIONS - A MOLECULAR-DYNAMICS STUDY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 2 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 AUG 22 PY 1993 VL 206 BP 213 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200965 ER PT J AU KUBAS, GJ NELSON, J LUO, XL ECKERT, J AF KUBAS, GJ NELSON, J LUO, XL ECKERT, J TI MAPPING OUT THE REACTION COORDINATE FOR H-2 ACTIVATION ON TRANSITION-METAL COMPLEXES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,INORGAN & STRUCT CHEM GRP 1,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 AUG 22 PY 1993 VL 206 BP 217 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102037 ER PT J AU PATTEN, TE NOVAK, BM AF PATTEN, TE NOVAK, BM TI THE LIVING POLYMERIZATION OF ISOCYANATES - A USEFUL TOOL FOR THE SYNTHESIS OF NEW POLYMERS AND MATERIALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 221 EP PMSE PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201673 ER PT J AU DENG, YP BURNS, JH MOYER, BA AF DENG, YP BURNS, JH MOYER, BA TI INTERACTION OF A CROWN-ETHER WITH DIVALENT 1ST-ROW TRANSITION-METAL IONS - CALORIMETRIC, SPECTROSCOPIC, AND X-RAY CRYSTALLOGRAPHIC INVESTIGATION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 231 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102051 ER PT J AU DUNN, RC ALLEN, EV JOYCE, SA XIE, X AF DUNN, RC ALLEN, EV JOYCE, SA XIE, X TI NEAR-FIELD OPTICAL MICROSCOPE FOR FLUORESCENCE SPECTROSCOPY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 233 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200985 ER PT J AU PAIGE, KS CALLENDER, RH WOODRUFF, W DYER, RB AF PAIGE, KS CALLENDER, RH WOODRUFF, W DYER, RB TI INFRARED CHARACTERIZATION OF PEPTIDE FOLDING DYNAMICS 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 AUG 22 PY 1993 VL 206 BP 243 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200995 ER PT J AU LIU, YP LU, DH LYNCH, GC TRUONG, TN GONZALEZLAFONT, A TRUHLAR, DG AF LIU, YP LU, DH LYNCH, GC TRUONG, TN GONZALEZLAFONT, A TRUHLAR, DG TI MODELING THE DYNAMICS OF CHEMICAL-REACTIONS - COMPARISON OF THEORY AND EXPERIMENT SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. UNIV MINNESOTA, INST SUPERCOMP, MINNEAPOLIS, MN 55455 USA. UNIV MINNESOTA, DEPT CHEM, MINNEAPOLIS, MN 55455 USA. RI Gonzalez-Lafont, Angels/L-4898-2014; Truhlar, Donald/G-7076-2015 OI Gonzalez-Lafont, Angels/0000-0003-0729-2483; Truhlar, Donald/0000-0002-7742-7294 NR 0 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 244 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200996 ER PT J AU BROSS, AD PLADALMAU, A AF BROSS, AD PLADALMAU, A TI PREPARATION OF POLYSTYRENE-BASED PLASTIC SCINTILLATORS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. ARGO COMMUNITY HIGH SCH,ARGONNE,IL 60501. 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 AUG 22 PY 1993 VL 206 BP 250 EP CHED PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100876 ER PT J AU ECKERT, J AF ECKERT, J TI ORIGIN OF THE BARRIER TO ROTATION OF THE DIHYDROGEN LIGAND IN METAL-COMPLEXES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 251 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102071 ER PT J AU ALBINATI, A KOETZLE, TF AF ALBINATI, A KOETZLE, TF TI STRUCTURAL CHEMISTRY OF CLASSICAL AND NONCLASSICAL TRANSITION-METAL HYDRIDES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV MILAN,INST PHARMACEUT CHEM,I-20131 MILAN,ITALY. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RI Albinati, Alberto/I-1262-2015 OI Albinati, Alberto/0000-0002-8779-3327 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 AUG 22 PY 1993 VL 206 BP 254 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102074 ER PT J AU ALLISON, DP DOKTYCZ, MJ THUNDAT, T JACOBSON, KB WARMACK, RJ AF ALLISON, DP DOKTYCZ, MJ THUNDAT, T JACOBSON, KB WARMACK, RJ TI SCANNING PROBE MICROSCOPY OF IMMOBILIZED DNA SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37830. 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 AUG 22 PY 1993 VL 206 BP 254 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201266 ER PT J AU KRAUS, GA LI, J GORDON, MS JENSEN, J AF KRAUS, GA LI, J GORDON, MS JENSEN, J TI REGIOCONTROL BY REMOTE SUBSTITUENTS - AN ENANTIOSELECTIVE TOTAL SYNTHESIS OF FRENOLICIN-B SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,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 AUG 22 PY 1993 VL 206 BP 291 EP ORGN PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200465 ER PT J AU ZAK, J YUAN, HP HO, MK WOO, LK PORTER, MD AF ZAK, J YUAN, HP HO, MK WOO, LK PORTER, MD TI THIOL-DERIVATIZED METALLOPORPHYRINS - MONOMOLECULAR FILMS FOR THE ELECTROCATALYTIC REDUCTION OF DIOXYGEN AT GOLD ELECTRODES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,US DOE,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 AUG 22 PY 1993 VL 206 BP 304 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102124 ER PT J AU ELBERT, JE BROWN, GM GARRITY, ML SACHLEBEN, RA SLOOP, FV AF ELBERT, JE BROWN, GM GARRITY, ML SACHLEBEN, RA SLOOP, FV TI LANTHANIDE COMPLEXES AS REPORTER GROUPS FOR DNA-SEQUENCING SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RI Sloop, Jr., Frederick/J-2301-2016 OI Sloop, Jr., Frederick/0000-0001-6473-9507 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 AUG 22 PY 1993 VL 206 BP 309 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102129 ER PT J AU MAJUMDER, SA MIURA, M HOBBS, JD SHELNUTT, JA AF MAJUMDER, SA MIURA, M HOBBS, JD SHELNUTT, JA TI NONPLANAR WATER-SOLUBLE DODECA-SUBSTITUTED PORPHYRINS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,DEPT CHEM,ALBUQUERQUE,NM 87185. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RI Shelnutt, John/A-9987-2009 OI Shelnutt, John/0000-0001-7368-582X 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 AUG 22 PY 1993 VL 206 BP 311 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102131 ER PT J AU DOZIER, WD PEIFFER, DG LIN, MY RABEONY, M THIYAGARAJAN, P AGRAWAL, G WOOL, RP AF DOZIER, WD PEIFFER, DG LIN, MY RABEONY, M THIYAGARAJAN, P AGRAWAL, G WOOL, RP TI SMALL-ANGLE NEUTRON-SCATTERING AND NEUTRON REFLECTOMETRY STUDY OF A MODEL GRAFT COPOLYMER SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801. NIST,DIV REACTOR RADIAT,GAITHERSBURG,MD 20899. ARGONNE NATL LAB,ARGONNE,IL 60927. EXXON RES & ENGN CO,ANNANDALE,NJ 08801. 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 AUG 22 PY 1993 VL 206 BP 316 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201328 ER PT J AU LONDONO, JD WIGNALL, GD HONNELL, KG YETHIRAJ, A SCHWEIZER, KS AF LONDONO, JD WIGNALL, GD HONNELL, KG YETHIRAJ, A SCHWEIZER, KS TI ASYMMETRIES IN THE FLORY-HUGGINS INTERACTION PARAMETER IN ISOTOPIC POLYMER BLENDS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PHILLIPS PETR CO,RES & DEV,BARTLESVILLE,OK 74004. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. 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 AUG 22 PY 1993 VL 206 BP 321 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201333 ER PT J AU PENG, G VANELP, J QUE, L CRAMER, SP AF PENG, G VANELP, J QUE, L CRAMER, SP TI L-EDGE SPECTROSCOPY OF IRON COMPLEXES, MODELS FOR IRON-CONTAINING ENZYMES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV CALIF DAVIS,DEPT APPL SCI,DAVIS,CA 95616. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV MINNESOTA,DEPT CHEM,MINNEAPOLIS,MN 55455. 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 AUG 22 PY 1993 VL 206 BP 324 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102144 ER PT J AU GILLEN, KT CLOUGH, RL WISE, J AF GILLEN, KT CLOUGH, RL WISE, J TI EXTRAPOLATING ACCELERATED THERMAL-AGING RESULTS - A CRITICAL-LOOK AT THE ARRHENIUS METHOD 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 AUG 22 PY 1993 VL 206 BP 353 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201364 ER PT J AU BUCHANAN, AC BRITT, PF THOMAS, KB AF BUCHANAN, AC BRITT, PF THOMAS, KB TI ACID-CATALYZED REACTIONS IN DISPERSED SOLIDS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV CHEM,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 AUG 22 PY 1993 VL 206 BP 391 EP ORGN PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200565 ER PT J AU DOUGLAS, EP LANGLOIS, DA BENICEWICZ, BC AF DOUGLAS, EP LANGLOIS, DA BENICEWICZ, BC TI LIQUID-CRYSTALLINE BISACETYLENE THERMOSETS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,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 AUG 22 PY 1993 VL 206 BP 393 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201404 ER PT J AU PLADALMAU, A BARNABAS, M BROSS, AD TRIFUNAC, AD AF PLADALMAU, A BARNABAS, M BROSS, AD TRIFUNAC, AD TI ELECTRON-SPIN-RESONANCE STUDY OF IRRADIATED POLYSTYRENE FIBERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. 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 AUG 22 PY 1993 VL 206 BP 404 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201415 ER PT J AU HENDERSON, CC CAHILL, PA AF HENDERSON, CC CAHILL, PA TI SYNTHESIS AND CHARACTERIZATION OF 2 C-70H2 ISOMERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,DEPT 1811,ALBUQUERQUE,NM 87185. 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 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 406 EP ORGN PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200580 ER PT J AU HENDERSON, CC ASSINK, RA CAHILL, PA AF HENDERSON, CC ASSINK, RA CAHILL, PA TI SYNTHESIS AND CHARACTERIZATION OF C-60H4 ISOMERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,DEPT 1811,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 AUG 22 PY 1993 VL 206 BP 407 EP ORGN PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200581 ER PT J AU SAKURAI, K MACKNIGHT, WJ LOHSE, DJ LIN, MY SCHULZ, DN SISSANO, JA AGAMALYAN, M AF SAKURAI, K MACKNIGHT, WJ LOHSE, DJ LIN, MY SCHULZ, DN SISSANO, JA AGAMALYAN, M TI BLENDS OF AMORPHOUS-CRYSTALLINE BLOCK-COPOLYMERS WITH AMORPHOUS HOMOPOLYMERS - SMALL-ANGLE SCATTERING STUDIES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 EXXON RES & ENGN CO,CORP RES LABS,ANNANDALE,NJ 08801. UNIV MASSACHUSETTS,DEPT POLYMER SCI & ENGN,AMHERST,MA 01003. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 433 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201444 ER PT J AU POON, CD SAMULSKI, ET BENICEWICZ, BC AF POON, CD SAMULSKI, ET BENICEWICZ, BC TI RING DYNAMICS OF POLY(P-PHENYLENETEREPHTHALAMIDE) AND ITS DERIVATIVES BY SOLID-STATE H-2 NMR SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV N CAROLINA,DEPT CHEM,CHAPEL HILL,NC 27599. 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 AUG 22 PY 1993 VL 206 BP 436 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201447 ER PT J AU BENICEWICZ, BC DOAK, RA DEC, SF AF BENICEWICZ, BC DOAK, RA DEC, SF TI AROMATIC POLYAMIDES WITH LATERAL SUBSTITUENTS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. COLORADO STATE UNIV,CSU,NMR CTR,DEPT CHEM,FT COLLINS,CO 80523. 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 AUG 22 PY 1993 VL 206 BP 440 EP POLY PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201451 ER PT J AU BULLOCK, RM SONG, JS SZALDA, DJ LUAN, L AF BULLOCK, RM SONG, JS SZALDA, DJ LUAN, L TI HYDRIDE TRANSFER-REACTIONS OF TRANSITION-METAL HYDRIDES - IONIC HYDROGENATION OF ALKENES, ALKYNES, ALDEHYDES, AND KETONES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 442 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102263 ER PT J AU ARNEY, DSJ BURNS, CJ AF ARNEY, DSJ BURNS, CJ TI HIGH-VALENT ORGANOURANIUM COMPLEXES CONTAINING TERMINAL OXO FUNCTIONAL-GROUPS - A COMPARATIVE-STUDY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,INORGAN & STRUCT CHEM GRP,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 459 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102280 ER PT J AU WHITE, CJ AF WHITE, CJ TI SYNTHESIS, CHARACTERIZATION, AND SE-77 NMR-STUDIES OF SELENOPHENE TRANSITION-METAL COMPLEXES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 464 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102285 ER PT J AU GAVNEY, JA THOMPSON, JD DONOHOE, RJ SMITH, DC AF GAVNEY, JA THOMPSON, JD DONOHOE, RJ SMITH, DC TI CHARACTERIZATION OF METALLOCENE-C-60 BASED MATERIALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,INORGAN & STRUCT CHEM INC1,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,CONDENSED MATTER & THERMAL PHYS P10,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,SPECT & BIOCHEM INC14,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 AUG 22 PY 1993 VL 206 BP 533 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32102354 ER PT J AU SCHIPPER, L AF SCHIPPER, L TI ON BEING DENSE SO NEW SCIENTIST LA English DT Letter RP SCHIPPER, L (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU NEW SCIENTIST PUBL EXPEDITING INC PI ELMONT PA 200 MEACHAM AVE, ELMONT, NY 11003 SN 0262-4079 J9 NEW SCI JI New Sci. PD AUG 21 PY 1993 VL 139 IS 1887 BP 48 EP 48 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA LU626 UT WOS:A1993LU62600042 ER PT J AU MALINIE, G HARTMANN, DH CLAYTON, DD MATHEWS, GJ AF MALINIE, G HARTMANN, DH CLAYTON, DD MATHEWS, GJ TI INHOMOGENEOUS CHEMICAL EVOLUTION OF THE GALACTIC DISK SO ASTROPHYSICAL JOURNAL LA English DT Article DE STARS, ABUNDANCES; STARS, EVOLUTION; STARS, STATISTICS ID SURFACE MASS DENSITY; DWARF IRREGULAR GALAXIES; UVBY-BETA PHOTOMETRY; MAIN-SEQUENCE STARS; SOLAR NEIGHBORHOOD; ANALYTIC MODELS; VELOCITY-DISPERSION; ABUNDANCE GRADIENT; GLOBULAR-CLUSTERS; AGE-DEPENDENCE AB We present analytical models for inhomogeneous chemical evolution (ICE) of systems in which the star formation history resembles a series of bursts, localized in space and/or time, with intermittent periods of remixing. The additional parameter of this model is the metallicity increment of bursting subsystems, but this parameter is constrained by the spread in the age-metallicity relation. We apply this model to the solar annulus in the Galactic disk and show that ICE models yield an improved fit to the observed shape of the stellar abundance distribution function (ADF). The G-dwarf problem can be alleviated with ICE models, but infall of metal poor ps and/or some preenrichment of the disk during the epoch of protogalactic evolution is still required to explain the paucity of low-metallicity dwarfs. ICE models also suggest an explanation of the reduced frequency of metal-rich G-dwarfs relative to the predictions of the simple model. It does not seem likely that chemical evolution of the solar annulus proceeded in a medium that was well-mixed at all times. So, while the simple model may be used to describe the evolution of bulk abundances in a well-mixed system, we promote the use of simple ICE models to describe the evolution of systems that locally undergo enhanced star-forming bursts, but in which the resulting chemical enrichments are only slowly remixed and homogenized within the global system. C1 CLEMSON UNIV,DEPT PHYS & ASTRON,CLEMSON,SC 29634. LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,DIV E,LIVERMORE,CA 94550. RP MALINIE, G (reprint author), COMMISSARIAT ENERGIE ATOM,F-94195 VILLENEUVE ST GEO,FRANCE. NR 83 TC 62 Z9 62 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 20 PY 1993 VL 413 IS 2 BP 633 EP 640 DI 10.1086/173032 PN 1 PG 8 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LT200 UT WOS:A1993LT20000018 ER PT J AU ARONS, J KING, IR AF ARONS, J KING, IR TI A REPROCESSING MODEL FOR THE ULTRAVIOLET AND OPTICAL LIGHT FROM 4U-1820-30 SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; BINARIES, CLOSE; STARS, NEUTRON; X-RAYS, STARS ID RAY AB We show that the recently discovered optical and ultraviolet light from the X-ray burst source 4U 1820-30 in the globular cluster NGC 6624 is due to reprocessing of the X-rays in the outer regions of an optically thick, geometrically thin accretion disk. We suggest that observation of orbital modulation of the reprocessed light, due to the variable contribution made as the heated face of the companion turns toward and away from the observer, would provide constraints on the inclination of the binary orbit, and we suggest that detection in the reprocessed flux of the '' red noise '' already observed in the X-rays would provide useful constraints on the geometry and physics of the accretion disk. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,LIVERMORE,CA 94550. RP ARONS, J (reprint author), UNIV CALIF BERKELEY,DEPT ASTRON,601 CAMPBELL HALL,BERKELEY,CA 94720, USA. NR 16 TC 34 Z9 34 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 AUG 20 PY 1993 VL 413 IS 2 BP L121 EP L124 DI 10.1086/186974 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LT202 UT WOS:A1993LT20200017 ER PT J AU ANDREWS, GF AF ANDREWS, GF TI THE YIELD EQUATIONS IN THE MODELING AND CONTROL OF BIOPROCESSES SO BIOTECHNOLOGY AND BIOENGINEERING LA English DT Article DE YIELD; MODELING; ENERGY BALANCE ID GROWTH AB Two basic questions in bioprocess modeling are how many rate equations must be specified and which processes (substrate uptake, product formation, etc.) they should describe. The number of rate equations is constrained by the yield equations, which represent the balances of reducing power, energy in the form of ATP, and the various elements involved in microbial metabolism. These balances are derived from a simplified picture that divides metabolism into catabolic, anabolic, respiratory, and product formation pathways. The linear growth equation for aerobic metabolism and the Ludeking-Piret equation for product formation by fermentation are derived from these balances, and the yield coefficients are related to the metabolic parameters, Y(ATP) (P/O), etc. The use of oxygen for purposes other than respiration is included in the analysis and extends the idea of a constant ''yield on available electrons'' to very reduced substrates. These balances specify the number of degrees of freedom, i.e., the number of pieces of information required to complete the description of the system. This information may be in the form of measurements, knowledge of the biochemical pathways, or rate equations. The number of rate measurements available (usually two, the consumption rates of O2 and CO2) versus the number needed defines the state estimation problem in bioprocess control. Rate equations usually specify the biomass growth rate, but it may be preferable to specify the specific consumption rate of the limiting nutrient. (C) 1993 John Wiley & Sons, Inc. RP ANDREWS, GF (reprint author), IDAHO NATL ENGN LAB,CTR BIOPROC TECHNOL,IDAHO FALLS,ID 83415, USA. NR 11 TC 16 Z9 16 U1 1 U2 4 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0006-3592 J9 BIOTECHNOL BIOENG JI Biotechnol. Bioeng. PD AUG 20 PY 1993 VL 42 IS 5 BP 549 EP 556 DI 10.1002/bit.260420502 PG 8 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA LN598 UT WOS:A1993LN59800001 PM 18613076 ER PT J AU BOO, DW LEE, YT AF BOO, DW LEE, YT TI INFRARED-SPECTRA OF CH5+ CORE IN CH5+ (H2) SO CHEMICAL PHYSICS LETTERS LA English DT Article ID MOLECULAR-ORBITAL THEORY; GAS-PHASE; ENERGETICS; CH5+(CH4)N; IONS AB The infrared spectra of the CH5+ core in CH5+ (H-2) are presented. These spectra are the first spectroscopic results for the CH5+ related systems. The C-H stretching bands of the CH5+ core were observed as one broad feature with shoulders, centered at 2966 cm-1. The predicted C-H stretching frequencies for the minimum energy structure containing CH5+ with eclipsed C(s) symmetry match quite well those of the observed features after appropriate scaling. Possible reasons for the band broadening are also discussed. C1 LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP BOO, DW (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. RI Lee, Yuan-Tseh/F-7914-2012 NR 16 TC 42 Z9 42 U1 1 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD AUG 20 PY 1993 VL 211 IS 4-5 BP 358 EP 363 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LT225 UT WOS:A1993LT22500013 ER PT J AU MONKS, PS STIEF, LJ KRAUSS, M KUO, SC KLEMM, RB AF MONKS, PS STIEF, LJ KRAUSS, M KUO, SC KLEMM, RB TI A DISCHARGE-FLOW PHOTOIONIZATION MASS-SPECTROMETRIC STUDY OF THE BRO (X2-PI) RADICAL - PHOTOIONIZATION SPECTRUM AND IONIZATION-ENERGY SO CHEMICAL PHYSICS LETTERS LA English DT Article ID COMPACT EFFECTIVE POTENTIALS; EXPONENT BASIS-SETS; KINETICS; OZONE; EFFICIENT; ATOMS; HBR AB The photoionization spectrum of BrO was measured over the wavelength range lambda = 106-122 nm using a discharge-flow photoionization mass spectrometer apparatus coupled to a synchrotron radiation source. BrO was generated by the reaction of O(3P) atoms with molecular bromine. A value of 10.46 +/- 0.02 eV was obtained for the adiabatic ionization energy of BrO from photoion thresholds, corresponding to the BrO+ (X 3SIGMA-)<--BrO(X 2PI3/2) transition. Spectra for both the (BrO)-Br-79 and (BrO)-Br-81 isotopes were very similar and the resultant photoion thresholds were identical, within experimental uncertainty. The structure observed in the spectra is discussed in terms of available states for BrO+, which have been calculated using MC-SCF methods. C1 CTR ADV RES BIOTECHNOL,ROCKVILLE,MD 20850. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP MONKS, PS (reprint author), NASA,GODDARD SPACE FLIGHT CTR,EXTRATERRESTRIAL PHYS LAB,GREENBELT,MD 20771, USA. RI Monks, Paul/H-6468-2016 OI Monks, Paul/0000-0001-9984-4390 NR 16 TC 28 Z9 28 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD AUG 20 PY 1993 VL 211 IS 4-5 BP 416 EP 420 DI 10.1016/0009-2614(93)87083-F PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LT225 UT WOS:A1993LT22500023 ER PT J AU ANGELOPOULOS, V KENNEL, CF CORONITI, FV PELLAT, R SPENCE, HE KIVELSON, MG WALKER, RJ BAUMJOHANN, W FELDMAN, WC GOSLING, JT RUSSELL, CT AF ANGELOPOULOS, V KENNEL, CF CORONITI, FV PELLAT, R SPENCE, HE KIVELSON, MG WALKER, RJ BAUMJOHANN, W FELDMAN, WC GOSLING, JT RUSSELL, CT TI CHARACTERISTICS OF ION FLOW IN THE QUIET STATE OF THE INNER PLASMA SHEET SO GEOPHYSICAL RESEARCH LETTERS LA English DT Article ID MODELS; FIELD; TAIL AB We use AMPTE/IRM and ISEE 2 data to study the properties of the high beta (beta(i) > 0.5) plasma sheet, the inner plasma sheet (IPS). Bursty bulk flows (BBFs) are excised from the two databases, and the average flow pattern in the non-BBF (quiet) IPS is constructed. At local midnight this ensemble-average flow is predominantly duskward; closer to the flanks it is mostly earthward. The flow pattern agrees qualitatively with calculations based on the Tsyganenko [1987] model (T87), where the earthward flow is due to the ensemble-average cross tail electric field and the duskward flow is the diamagnetic drift due to an inward pressure gradient. The IPS is on the average in pressure equilibrium with the lobes. Because of its large variance the average flow does not represent the instantaneous flow field. Case studies also show that the non-BBF flow is highly irregular and inherently unsteady, a reason why earthward convection can avoid a pressure balance inconsistency with the lobes. The ensemble distribution of velocities is a fundamental observable of the quiet plasma sheet flow field. C1 UNIV CALIF LOS ANGELES, IGPP, LOS ANGELES, CA 90024 USA. AEROSP CORP, CTR SPACE & ENVIRONM TECHNOL, LOS ANGELES, CA 90009 USA. MAX PLANCK INST EXTRATERR PHYS, W-8046 GARCHING, GERMANY. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP ANGELOPOULOS, V (reprint author), UNIV CALIF LOS ANGELES, DEPT PHYS, LOS ANGELES, CA 90024 USA. RI Baumjohann, Wolfgang/A-1012-2010; Kivelson, Margaret/I-9019-2012; Spence, Harlan/A-1942-2011; OI Baumjohann, Wolfgang/0000-0001-6271-0110; Kivelson, Margaret/0000-0003-3859-8581; Russell, Christopher/0000-0003-1639-8298 NR 14 TC 150 Z9 150 U1 2 U2 8 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0094-8276 J9 GEOPHYS RES LETT JI Geophys. Res. Lett. PD AUG 20 PY 1993 VL 20 IS 16 BP 1711 EP 1714 DI 10.1029/93GL00847 PG 4 WC Geosciences, Multidisciplinary SC Geology GA LU819 UT WOS:A1993LU81900012 ER PT J AU LAHIRI, A AF LAHIRI, A TI CONSTRAINED DYNAMICS OF THE COUPLED ABELIAN 2-FORM SO MODERN PHYSICS LETTERS A LA English DT Article AB I present the reduction of phase space of the theory of an antisymmetric tensor potential coupled to an Abelian gauge field, using Dirac's procedure. Duality transformations on the reduced phase space are also discussed. RP LAHIRI, A (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,T-8,LOS ALAMOS,NM 87545, USA. RI Lahiri, Amitabha/C-8114-2011 OI Lahiri, Amitabha/0000-0001-8113-6345 NR 0 TC 40 Z9 40 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 AUG 20 PY 1993 VL 8 IS 25 BP 2403 EP 2412 DI 10.1142/S021773239300369X PG 10 WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical SC Physics GA LY487 UT WOS:A1993LY48700007 ER PT J AU BLUMSTEIN, C HARRIS, J AF BLUMSTEIN, C HARRIS, J TI THE COST OF ENERGY EFFICIENCY SO SCIENCE LA English DT Letter C1 LAWRENCE BERKELEY LAB,WASHINGTON,DC 20024. RP BLUMSTEIN, C (reprint author), UNIV CALIF BERKELEY,UNIVERSITYWIDE ENERGY RES GRP,BERKELEY,CA 94720, USA. NR 3 TC 5 Z9 5 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 AUG 20 PY 1993 VL 261 IS 5124 BP 970 EP 970 DI 10.1126/science.261.5124.970 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA LT747 UT WOS:A1993LT74700003 PM 17739600 ER PT J AU WU, XZ OCKO, BM SIROTA, EB SINHA, SK DEUTSCH, M CAO, BH KIM, MW AF WU, XZ OCKO, BM SIROTA, EB SINHA, SK DEUTSCH, M CAO, BH KIM, MW TI SURFACE-TENSION MEASUREMENTS OF SURFACE FREEZING IN LIQUID NORMAL-ALKANES SO SCIENCE LA English DT Article ID SYNCHROTRON X-RAY; ORDER-DISORDER TRANSITIONS; MOLECULAR-DYNAMICS; CRYSTAL FILMS; ARGON FILMS; PATTERNS; GROWTH AB Surface tension measurements reveal surface freezing in liquid n-alkanes. A solid monolayer of molecules is found to exist up to 3-degrees-C above the bulk freezing point. This surface phase exists only for carbon numbers 14 < n less-than-or-equal-to 50. The measured carbon number and temperature dependence of the surface tension is interpreted within a simple thermodynamical model based on known bulk latent heat data and surface energy considerations. The vanishing of the surface phase for n less-than-or-equal-to 14 is a possible transition from surface freezing to surface melting behavior. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. BAR ILAN UNIV,DEPT PHYS,IL-52900 RAMAT GAN,ISRAEL. RP WU, XZ (reprint author), EXXON RES & ENGN CO,CORP RES SCI LAB,ANNANDALE,NJ 08801, USA. RI Sirota, Eric/A-7633-2009; Kim, Mahn Won/C-1541-2011 NR 34 TC 201 Z9 203 U1 4 U2 39 PU AMER ASSOC ADVANCEMENT SCIENCE PI WASHINGTON PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 SN 0036-8075 J9 SCIENCE JI Science PD AUG 20 PY 1993 VL 261 IS 5124 BP 1018 EP 1021 DI 10.1126/science.261.5124.1018 PG 4 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA LT747 UT WOS:A1993LT74700025 PM 17739620 ER PT J AU RODRIGUEZ, JA HRBEK, J YANG, YW KUHN, M SHAM, TK AF RODRIGUEZ, JA HRBEK, J YANG, YW KUHN, M SHAM, TK TI PHOTOEMISSION AND THERMAL-DESORPTION STUDIES OF CS-AU AND LI-AU FILMS ON RU(001) SO SURFACE SCIENCE LA English DT Article ID CORE-LEVEL SHIFTS; ELECTRONIC-STRUCTURE; INTERMETALLIC COMPOUNDS; CHARGE-TRANSFER; SURFACE; TRANSITION; ADSORPTION; LITHIUM; ALLOYS; METALS AB The properties of Cs-Au and Li-Au alloy films on Ru(001) have been studied using temperature-programmed desorption and core- and valence-level photoemission. Li-Au alloys have a larger thermal stability than Cs-Au alloys. For CsAu alloy films, thermal decomposition occurs between 400 and 500 K. In contrast, LiAu films are stable up to 600 K In the decomposition process of the alkali-gold alloys, Li-Au or Cs-Au bonds are replaced by Au-Au bonds, and the alkali segregates to the surface of the film before desorbing, with Au remaining on top of the Ru substrate up to about 1050 K when desorption of the Au multilayer starts. The results of valence-band photoemission indicate that LiAu has metallic properties, showing no band gap in the region close to the Fermi level. On the other hand, the valence spectra for CsAu show the typical band gap expected for a semiconductor. The formation of Li-Au and Cs-Au bonds produces a large shift toward higher binding energy in the centroid of the Au 5d band and a reduction in the Au(5d3/2)-Au(5d5/2) separation. Alloys saturated with Cs or Li show a separation of approximately 1.5 eV between the Au 5d3/2 and 5d5/2 levels. For CsAu, the binding-energy shifts with respect to the Fermi edge are + 1.3 eV for the Au4f levels and -0.3 eV for the Cs 3d and 4d levels. The corresponding shifts with respect to the vacuum level are approximately -2.0 eV for the Au 4f levels and -0.6 eV for the Cs 3d and 4d levels. The shift in the Au levels is a consequence of electron transfer from Cs to Au, whereas the shifts in the Cs levels are a result of a large contraction in the atomic volume of Cs. In LiAu, the binding-energy shifts with respect to the Fermi edge are +0.4 eV for the Au 4f levels and approximately 0 eV for the Li Is level. C1 UNIV WESTERN ONTARIO,DEPT CHEM,LONDON N6A 5B7,ONTARIO,CANADA. RP RODRIGUEZ, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Hrbek, Jan/I-1020-2013 NR 56 TC 33 Z9 33 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 20 PY 1993 VL 293 IS 3 BP 260 EP 274 DI 10.1016/0039-6028(93)90320-J PG 15 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LT529 UT WOS:A1993LT52900023 ER PT J AU ADZIC, RR WANG, J VITUS, CM OCKO, BM AF ADZIC, RR WANG, J VITUS, CM OCKO, BM TI THE ELECTRODEPOSITION OF PB MONOLAYERS ON LOW-INDEX PT SURFACES - AN X-RAY-SCATTERING AND SCANNING-TUNNELING-MICROSCOPY STUDY SO SURFACE SCIENCE LA English DT Letter ID ATOMIC FORCE MICROSCOPE; UNDERPOTENTIAL DEPOSITION; ANION ADSORPTION; AU(111); LEAD; ELECTROCHEMISTRY; COMPRESSIBILITY; DIFFRACTION; PT(111); ADATOMS AB The electrodeposition of a lead monolayer on Pt(111) forms an ordered structure with a rectangular 4Pb-(3 x square-root 3) unit cell, theta(Pb) = 2/3, as determined by in situ SXS and STM techniques. Close to Pt terrace edges, a coexisting 7Pb-(2 square-root 3 x 2 square-root 3)R30-degrees unit cell, theta(Pb) = 7/12, was observed with STM. Data from both techniques suggest an order-disorder phase transition which is associated with a very sharp peak in the current-potential curve. No ordered structures were observed for Pt(100) and Pt(110) by SXS, while islands were observed on Pt(100) by STM. These results emphasize the importance of the in situ studies of electrodeposited monolayers. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP ADZIC, RR (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. NR 25 TC 28 Z9 28 U1 0 U2 7 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 20 PY 1993 VL 293 IS 3 BP L876 EP L883 PG 8 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LT529 UT WOS:A1993LT52900002 ER PT J AU SACHLEBEN, RA DAVIS, MC BRUCE, JJ RIPPLE, ES DRIVER, JL MOYER, BA AF SACHLEBEN, RA DAVIS, MC BRUCE, JJ RIPPLE, ES DRIVER, JL MOYER, BA TI AN EFFICIENT SYNTHESIS OF LITHIUM-SELECTIVE EXTRACTANTS - TERTIARY-ALKYL-14-CROWN-4 ETHERS SO TETRAHEDRON LETTERS LA English DT Article ID 14-CROWN-4; DERIVATIVES; BEARING AB Highly-substituted crown ethers can be synthesized efficiently from tertiary and neopentyl diols. Nonamethyl-14-crown-4 and methyl-didecalino-14-crown-4 ethers are lipophilic and highly soluble in organic solvents and function as efficient, lithium-selective extractants. RP SACHLEBEN, RA (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. RI Solominow, Sonia/A-4021-2008; Moyer, Bruce/L-2744-2016 OI Moyer, Bruce/0000-0001-7484-6277 NR 11 TC 16 Z9 18 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0040-4039 J9 TETRAHEDRON LETT JI Tetrahedron Lett. PD AUG 20 PY 1993 VL 34 IS 34 BP 5373 EP 5376 DI 10.1016/S0040-4039(00)73912-8 PG 4 WC Chemistry, Organic SC Chemistry GA LT953 UT WOS:A1993LT95300003 ER PT J AU MASTEN, DA FOY, BR HARRADINE, DM DYER, RB AF MASTEN, DA FOY, BR HARRADINE, DM DYER, RB TI IN-SITU RAMAN-SPECTROSCOPY OF REACTIONS IN SUPERCRITICAL WATER SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter AB The decomposition of hydrazine (N2H4) in near-critical and supercritical water is studied by in situ Raman spectroscopy. A high-pressure, high-temperature optical cell equipped with diamond windows allows us to perform Raman measurements at up to 430-degrees-C and 350 atm of water. Using the optical cell as a steady-state flow reactor, the decay of hydrazine and the production of ammonia are followed optically as a function of reaction time to yield an effective first-order rate constant for decomposition of 0.32 s-1 at 400-degrees-C. C1 LOS ALAMOS NATL LAB,PHOTOCHEM & PHOTOPHYS GRP,CLS-4,LOS ALAMOS,NM 87545. NR 20 TC 39 Z9 39 U1 0 U2 6 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 AUG 19 PY 1993 VL 97 IS 33 BP 8557 EP 8559 DI 10.1021/j100135a003 PG 3 WC Chemistry, Physical SC Chemistry GA LX144 UT WOS:A1993LX14400003 ER PT J AU TRILLING, GH AF TRILLING, GH TI SDC TRULY INTERNATIONAL SO NATURE LA English DT Letter RP TRILLING, GH (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU MACMILLAN MAGAZINES LTD PI LONDON PA PORTERS SOUTH, 4 CRINAN ST, LONDON, ENGLAND N1 9XW SN 0028-0836 J9 NATURE JI Nature PD AUG 19 PY 1993 VL 364 IS 6439 BP 664 EP 664 DI 10.1038/364664a0 PG 1 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA LT677 UT WOS:A1993LT67700014 ER PT J AU WOLF, A SCHOLTEN, O CASTEN, RF AF WOLF, A SCHOLTEN, O CASTEN, RF TI F-SPIN PURITY OF 2+1 STATES IN EVEN-EVEN NUCLEI SO PHYSICS LETTERS B LA English DT Article ID INTERACTING BOSON MODEL; DEFORMED-NUCLEI; M1 TRANSITIONS; SYMMETRY; ER-168; IBA-2 AB A procedure is proposed by which upper limits to the F-spin purity of 2+1 states in even-even nuclei can be estimated by an analysis of experimental g-factors. The procedure, applied to 17 nuclei with 46 less-than-or-equal-to Z less-than-or-equal-to 78, showed that F < F(max) admixtures up to 10% are not uncommon. A systematic behavior with Z is observed. In the present approach, these admixtures account in part for the observed deviations of the boson g-factors g(pi) and g(nu) from their ''bare'' values of 1 and 0. C1 CLARK UNIV,WORCESTER,MA 01610. NEGEV RES CTR,IL-84190 BEER SHEVA,ISRAEL. KERNFYS VERSNELLER INST,GRONINGEN,NETHERLANDS. RP WOLF, A (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 21 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 19 PY 1993 VL 312 IS 4 BP 372 EP 376 DI 10.1016/0370-2693(93)90969-O PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LT388 UT WOS:A1993LT38800002 ER PT J AU FALK, AF LUKE, M SAVAGE, MJ WISE, MB AF FALK, AF LUKE, M SAVAGE, MJ WISE, MB TI HEAVY-QUARK FRAGMENTATION TO POLARIZED QUARKONIUM SO PHYSICS LETTERS B LA English DT Article ID DECAYS AB We calculate the polarisation of psi's and UPSILON's produced by the fragmentation of heavy quarks. We find that fragmentation to transversely aligned quarkonium is slightly enhanced relative to longitudinally polarised quarkonium. This net alignment corresponds to a approximately 5% asymmetry in the angular distribution of leptons produced in the subsequent decay of the quarkonium. We point out that the leading gluon contribution to psi and UPSILON production arises from the evolution of the charm quark fragmentation function, rather than from direct gluon fragmentation. C1 UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093. CALTECH,PASADENA,CA 91125. RP FALK, AF (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 12 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 19 PY 1993 VL 312 IS 4 BP 486 EP 490 DI 10.1016/0370-2693(93)90986-R PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LT388 UT WOS:A1993LT38800019 ER PT J AU MEFFE, GK SNELSON, FF AF MEFFE, GK SNELSON, FF TI ANNUAL LIPID CYCLE IN EASTERN MOSQUITOFISH (GAMBUSIA-HOLBROOKI, POECILIIDAE) FROM SOUTH-CAROLINA SO COPEIA LA English DT Article ID GEESE; FISH AB Storage lipids may be an important energy source for reproduction and may otherwise affect life histories in fish. We collected eastern mosquitofish monthly for one year from two populations in South Carolina to determine annual somatic and reproductive lipid use. In both populations, there was a seasonal shift of lipids from soma to reproduction in early spring. Several other patterns of lipid use indicated energetic trade-offs between somatic storage and reproductive use, and energetic limitations in reproduction were apparent. Fish from the two populations showed consistently different patterns in clutch size, reproductive allocation, and percent lipids devoted to reproduction, indicating either genetically based or environmentally induced differences in life histories. Overall, energy collected during more productive times of the year (late summer and fall) and stored in the form of lipids appeared to be an important component of the reproductive energy budget in spring. C1 UNIV CENT FLORIDA,DEPT BIOL,ORLANDO,FL 32816. RP MEFFE, GK (reprint author), UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29802, USA. NR 17 TC 28 Z9 29 U1 3 U2 10 PU AMER SOC ICHTHYOLOGISTS HERPETOLOGISTS BUSINESS OFFICE PI CARBONDALE PA SOUTHERN ILLINOIS UNIV, DEPT ZOOLOGY, CARBONDALE, IL 62901-6501 SN 0045-8511 J9 COPEIA JI Copeia PD AUG 18 PY 1993 IS 3 BP 596 EP 604 PG 9 WC Zoology SC Zoology GA LU363 UT WOS:A1993LU36300002 ER PT J AU NESBIT, DH MEFFE, GK AF NESBIT, DH MEFFE, GK TI CANNIBALISM FREQUENCIES IN WILD POPULATIONS OF THE EASTERN MOSQUITOFISH (GAMBUSIA-HOLBROOKI, POECILIIDAE) IN SOUTH-CAROLINA SO COPEIA LA English DT Note C1 UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29802. WAKE FOREST UNIV,DEPT BIOL,WINSTON SALEM,NC 27109. NR 19 TC 19 Z9 22 U1 0 U2 6 PU AMER SOC ICHTHYOLOGISTS HERPETOLOGISTS BUSINESS OFFICE PI CARBONDALE PA SOUTHERN ILLINOIS UNIV, DEPT ZOOLOGY, CARBONDALE, IL 62901-6501 SN 0045-8511 J9 COPEIA JI Copeia PD AUG 18 PY 1993 IS 3 BP 867 EP 870 PG 4 WC Zoology SC Zoology GA LU363 UT WOS:A1993LU36300036 ER PT J AU BRNICEVIC, N PLANINIC, P BASIC, I MCCARLEY, RE RUTAR, V XIE, X AF BRNICEVIC, N PLANINIC, P BASIC, I MCCARLEY, RE RUTAR, V XIE, X TI REACTIONS OF [(M6X12)(H2O)4X2].4H2O (M = NB, TA X = CL, BR) IN METHANOL - SUBSTITUTION OF COORDINATED WATER AND HALOGEN BY METHANOL AS DETERMINED BY H-1-NMR SPECTRA AND CONDUCTANCE DATA SO INORGANIC CHEMISTRY LA English DT Note ID HEXANUCLEAR NIOBIUM; TANTALUM; CHEMISTRY; COMPLEXES; METAL; H2O; HALIDES; M=NB; X=CL C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP BRNICEVIC, N (reprint author), RUDJER BOSKOVIC INST,ZAGREB 41000,CROATIA. NR 13 TC 12 Z9 12 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 AUG 18 PY 1993 VL 32 IS 17 BP 3786 EP 3788 DI 10.1021/ic00069a041 PG 3 WC Chemistry, Inorganic & Nuclear SC Chemistry GA LU165 UT WOS:A1993LU16500041 ER PT J AU TSANG, T AF TSANG, T TI MEASUREMENT OF FEMTOSECOND ELECTRON BUNCHES FROM METAL PHOTOCATHODES SO APPLIED PHYSICS LETTERS LA English DT Article ID LASER; EMISSION; SOLITONS AB A technique of direct generation and detection of femtosecond electron bunches is reported. These electrons pulses are measured with high accuracy using nonlinear photoemission. In this initial demonstration, n = 1 and higher-order femtosecond optical soliton pulses are used to liberate electrons from metals. RP TSANG, T (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 15 TC 8 Z9 8 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 16 PY 1993 VL 63 IS 7 BP 871 EP 873 DI 10.1063/1.109885 PG 3 WC Physics, Applied SC Physics GA LT206 UT WOS:A1993LT20600006 ER PT J AU HERMES, RE ALLIK, TH CHANDRA, S HUTCHINSON, JA AF HERMES, RE ALLIK, TH CHANDRA, S HUTCHINSON, JA TI HIGH-EFFICIENCY PYRROMETHENE DOPED SOLID-STATE DYE-LASERS SO APPLIED PHYSICS LETTERS LA English DT Article AB Successful laser oscillation of various pyrromethene dyes doped in a modified acrylic plastic has been achieved. Pumped with a frequency doubled Nd:YAG laser at 532 nm, a slope efficiency of 85% has been obtained from one of the dyes in plastic, with an output beam energy of 128 mJ. A useful lifetime of greater than 20 000 shots at 3.33 Hz with output energies above 30 mJ has been demonstrated, with only a 34% loss in the available output energy. C1 SCI APPLICAT INT CORP,MCLEAN,VA 22102. NIGHT VIS & ELECTR SENSORS DIRECTORATE,DIV LASERS & PHOTON,FT BELVOIR,VA 22060. RP HERMES, RE (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,POLYMERS & COATINGS GRP,LOS ALAMOS,NM 87545, USA. NR 8 TC 193 Z9 196 U1 2 U2 8 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 AUG 16 PY 1993 VL 63 IS 7 BP 877 EP 879 DI 10.1063/1.109887 PG 3 WC Physics, Applied SC Physics GA LT206 UT WOS:A1993LT20600008 ER PT J AU THUNDAT, T WARMACK, RJ DING, D COMPTON, RN AF THUNDAT, T WARMACK, RJ DING, D COMPTON, RN TI ATOMIC-FORCE MICROSCOPE INVESTIGATION OF C-60 ADSORBED ON SILICON AND MICA SO APPLIED PHYSICS LETTERS LA English DT Article ID SCANNING TUNNELING MICROSCOPY; SCALE FRICTION; C-60; C-60/C-70; MOLECULES; SURFACES; FILMS AB The morphological and frictional characteristics of C60 adsorbed on silicon and mica surfaces have been investigated using atomic force microscopy (AFM). Deposition of fullerenes by vacuum sublimation results in uniform coverage of microcrystallites with an average size between 40 and 60 nm. Small area scans on the top of these microcrystallites show disordered arrangements of molecules. Frictional measurements carried out monitoring buckling of the AFM cantilever show increased friction for C60-covered surfaces over that of clean substrates. At sufficiently high forces, the film was selectively displaced by the AFM tip, so that fine patterns could be drawn on fullerene-covered surfaces. RP THUNDAT, T (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 22 TC 45 Z9 46 U1 3 U2 16 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 AUG 16 PY 1993 VL 63 IS 7 BP 891 EP 893 DI 10.1063/1.109892 PG 3 WC Physics, Applied SC Physics GA LT206 UT WOS:A1993LT20600013 ER PT J AU HOLLAND, OW ZHOU, DS THOMAS, DK AF HOLLAND, OW ZHOU, DS THOMAS, DK TI DAMAGE ACCUMULATION DURING HIGH-DOSE, O+ IMPLANTATION IN SI SO APPLIED PHYSICS LETTERS LA English DT Article ID SILICON-ON-INSULATOR; OXYGEN IMPLANTATION; DEVICES; CIRCUITS; DENSITY; SOI AB High-dose O+ implantation of Si between 450 and 500 keV is investigated to better understand the mechanisms responsible for ion-induced growth of damage, especially in the top Si layer ahead of the region where a buried oxide forms. Two distinct states are identified in this Si layer over an extended range of fluence (greater-than-or-equal-to 10(18) cm-2): a low-density defect state and a high-density one. These states are observed at all irradiation temperatures, including ambient temperature. The transition between the states is rather abrupt with the onset at a high fluence, which decreases with decreasing temperature. The existence of the low-density state offers a possibility of forming dislocation-free silicon-on-insulator wafers, even for ambient temperature irradiations. A processing method for achieving such wafers is discussed. RP HOLLAND, OW (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 16 TC 18 Z9 18 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 AUG 16 PY 1993 VL 63 IS 7 BP 896 EP 898 DI 10.1063/1.109894 PG 3 WC Physics, Applied SC Physics GA LT206 UT WOS:A1993LT20600015 ER PT J AU SCHNEIDER, RP LOTT, JA AF SCHNEIDER, RP LOTT, JA TI CAVITY DESIGN FOR IMPROVED ELECTRICAL INJECTION IN INALGAP/ALGAAS VISIBLE (639-661 NM) VERTICAL-CAVITY SURFACE-EMITTING LASER-DIODES SO APPLIED PHYSICS LETTERS LA English DT Article ID TEMPERATURE-DEPENDENCE; THRESHOLD CURRENT; ALLOYS; GAAS AB A novel optical cavity design for improved electrical injection in visible vertical-cavity surface-emitting laser (VCSEL) diodes employing an InGaP/InAlGaP strained quantum-well active optical cavity and AlAs/Al0.5Ga0.5As distributed Bragg reflectors (DBRs) is described. The cavity design was determined by measuring the lasing threshold current density of visible edge-emitting laser diodes with AlAs/Al0.5Ga0.5As DBR cladding layers. By inserting InAlP spacer layers between the active region and the DBR cladding, significant improvement in the performance of the edge-emitting lasers was achieved. This approach was then applied to the design of visible VCSEL diodes, and resulted in the first demonstration of room-temperature electrically injected lasing, over the wavelength range 639-661 nm. The visible VCSELs, with a diameter of 20 mum, exhibit pulsed output power of 3.4 mW at 650 nm, and continue to lase at a duty cycle of 40%. The threshold current was 30 mA, with a low threshold voltage (2.7 V) and low series resistance (< 15 OMEGA). RP SCHNEIDER, RP (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 20 TC 20 Z9 20 U1 0 U2 4 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 AUG 16 PY 1993 VL 63 IS 7 BP 917 EP 919 DI 10.1063/1.109844 PG 3 WC Physics, Applied SC Physics GA LT206 UT WOS:A1993LT20600022 ER PT J AU HOLESINGER, TG MILLER, DJ VISWANATHAN, HK DENNIS, KW CHUMBLEY, LS WINANDY, PW YOUNGDAHL, AC AF HOLESINGER, TG MILLER, DJ VISWANATHAN, HK DENNIS, KW CHUMBLEY, LS WINANDY, PW YOUNGDAHL, AC TI DIRECTIONAL ISOTHERMAL GROWTH OF HIGHLY TEXTURED BI2SR2CACU2OY SO APPLIED PHYSICS LETTERS LA English DT Article ID CA-CU-O; SUPERCONDUCTOR; FIBERS; SYSTEM; OXYGEN AB For Bi2Sr2CaCu2Oy (2212), it is shown that an oxygen gradient, as opposed to a temperature gradient, can be used to produce large bulk forms of the 2212 superconductor with highly textured microstructures from an oxygen-deficient melt held at a constant temperature. Material produced in this manner was found to have transition temperatures between 85 and 92 K, high critical current densities below 20 K, and modest critical current densities at 77 K. C1 ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011. AMES LAB,AMES,IA 50011. RP HOLESINGER, TG (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 15 TC 20 Z9 20 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 16 PY 1993 VL 63 IS 7 BP 982 EP 984 DI 10.1063/1.109865 PG 3 WC Physics, Applied SC Physics GA LT206 UT WOS:A1993LT20600044 ER PT J AU BAQUERO, R YANEZ, M SALMERON, M AF BAQUERO, R YANEZ, M SALMERON, M TI THEORETICAL-STUDY OF PHOTOEMISSION EXPERIMENTS ON PT SURFACES WITH AU OVERLAYERS SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 7TH LATIN-AMERICAN SYMP ON SURFACE SCIENCE ( SLAFS7-CIACSAI ) CY NOV 15-20, 1992 CL BARILOCHE, ARGENTINA ID SPECTROSCOPY; PT(111) AB We describe photoemission data of a gold monolayer on a Pt(001) surface. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP BAQUERO, R (reprint author), CINVESTAV IPN,DEPT FIS,APARTADO 14-740,MEXICO CITY 07000,DF,MEXICO. NR 5 TC 2 Z9 2 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 16 PY 1993 VL 5 SU 33A BP A161 EP A162 DI 10.1088/0953-8984/5/33A/041 PG 2 WC Physics, Condensed Matter SC Physics GA LV245 UT WOS:A1993LV24500042 ER PT J AU BLUM, B PLUMMER, EW ZEHNER, DM AF BLUM, B PLUMMER, EW ZEHNER, DM TI CORE-LEVEL PHOTOELECTRON-SPECTROSCOPY OF CU(100)-BI PHASES SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 7TH LATIN-AMERICAN SYMP ON SURFACE SCIENCE ( SLAFS7-CIACSAI ) CY NOV 15-20, 1992 CL BARILOCHE, ARGENTINA ID GRAIN-BOUNDARIES; BISMUTH; COPPER; BI; SEGREGATION; ALLOYS AB Bi induces restructuring of Cu(100)-Bi into Cu(210)-Bi. We report core level spectroscopy results of Cu(100)-Bi phases supporting the idea of these bonds being metallic. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV PENN,PHILADELPHIA,PA 19104. RP BLUM, B (reprint author), UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,DEPT FIS,RA-1428 BUENOS AIRES,ARGENTINA. NR 15 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 16 PY 1993 VL 5 SU 33A BP A163 EP A164 DI 10.1088/0953-8984/5/33A/042 PG 2 WC Physics, Condensed Matter SC Physics GA LV245 UT WOS:A1993LV24500043 ER PT J AU GRIMSDITCH, M KUMAR, S FULLERTON, EE AF GRIMSDITCH, M KUMAR, S FULLERTON, EE TI MAGNETIC EXCITATIONS IN ANTIFERROMAGNETICALLY COUPLED SUPERLATTICES - FE/MO AND FE/CR SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 7TH LATIN-AMERICAN SYMP ON SURFACE SCIENCE ( SLAFS7-CIACSAI ) CY NOV 15-20, 1992 CL BARILOCHE, ARGENTINA ID DOUBLE-LAYERS; SPIN-WAVES AB The results of Brillouin scattering experiments from magnetic excitations in Fe/Mo and Fe/CT superlattices are presented. Due to the large number of unknown parameters which enter into a complete theoretical description, it has not been possible to quantitatively interpret the Brillouin results. Trends in the magnetic field dependence of the magnon frequencies are however consistent with the interlayer coupling strength obtained from magnetization data. RP GRIMSDITCH, M (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Fullerton, Eric/H-8445-2013 OI Fullerton, Eric/0000-0002-4725-9509 NR 13 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 16 PY 1993 VL 5 SU 33A BP A369 EP A372 DI 10.1088/0953-8984/5/33A/139 PG 4 WC Physics, Condensed Matter SC Physics GA LV245 UT WOS:A1993LV24500140 ER PT J AU MONTANO, PA CAO, Y AF MONTANO, PA CAO, Y TI SYNCHROTRON-RADIATION STUDIES OF SMALL PARTICLES AND SUPPORTED CATALYSTS SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 7TH LATIN-AMERICAN SYMP ON SURFACE SCIENCE ( SLAFS7-CIACSAI ) CY NOV 15-20, 1992 CL BARILOCHE, ARGENTINA ID ABSORPTION FINE-STRUCTURE; EXTENDED X-RAY; SOLID ARGON AB We used XAFS to determine the local structure around small CuO clusters on alumina, between room temperature and 400-degrees-C. We measured the spectra at the copper and sulphur K edges to obtain information on the structure and chemical state of the clusters. C1 CUNY BROOKLYN COLL,BROOKLYN,NY 11210. RP MONTANO, PA (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60649, USA. NR 8 TC 3 Z9 3 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 16 PY 1993 VL 5 SU 33A BP A209 EP A210 DI 10.1088/0953-8984/5/33A/065 PG 2 WC Physics, Condensed Matter SC Physics GA LV245 UT WOS:A1993LV24500066 ER PT J AU RITCHIE, RH AF RITCHIE, RH TI THE INTERACTION OF SWIFT ELECTRONS WITH SURFACE EXCITATIONS SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID DOUBLE-PLASMON EXCITATION; FAST CHARGED-PARTICLES; ENERGY-LOSS; VANDERWAALS INTERACTION; INELASTIC-SCATTERING; PHONON INTERACTION; DISPERSIVE MEDIA; STOPPING POWER; MICROSCOPY; FILMS AB For many decades swift electrons have provided a powerful tool for the study of the dynamical properties of condensed matter. The development of this technique has involved much important physics. Here we sketch the historical background of the field and some important developments in theory and experiment. Possible directions for future research are indicated. C1 UNIV TENNESSEE, DEPT PHYS, KNOXVILLE, TN 37996 USA. RP RITCHIE, RH (reprint author), OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. NR 111 TC 4 Z9 4 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 16 PY 1993 VL 5 SU 33A BP A17 EP A24 DI 10.1088/0953-8984/5/33A/002 PG 8 WC Physics, Condensed Matter SC Physics GA LV245 UT WOS:A1993LV24500003 ER PT J AU KIM, KD SPERLING, LH KLEIN, A WIGNALL, GD AF KIM, KD SPERLING, LH KLEIN, A WIGNALL, GD TI CHARACTERIZATION OF FILM FORMATION FROM DIRECT MINI-EMULSIFIED POLYSTYRENE LATEX-PARTICLES VIA SANS SO MACROMOLECULES LA English DT Article ID ANGLE NEUTRON-SCATTERING; MOLECULAR-WEIGHT; POLYMER DIFFUSION; SPINODAL DECOMPOSITION; COALESCENCE; INTERFACES; SYSTEMS; BULK; DYNAMICS; FRACTURE AB Mini-emulsified latexes of anionically polymerized deuterated and protonated polystyrene (DPS = 185 000, HPS = 200 000) were prepared by direct mini-emulsification. Films containing 6 % deuterated particles were annealed at 144-degrees-C for various periods of time. The average depth of penetration of the deuterated polystyrene chains and tensile strength buildup were characterized during the course of annealing. When the present results were compared with those of the conventional emulsion polymerized system, the directly mini-emulsified latex had greater interdiffusion rates and higher tensile strength than the emulsion polymerized latex system at similar annealing times. This difference may be due to the polydisperse nature of the molecular weight distribution and/or to the large and polar chain end groups of the emulsion polymerized system. The present system shows a minimum depth of penetration for full tensile strength of around 105-115 angstrom, comparable to 0.81 times the weight-average radius of gyration, R(g)w, of the whole polystyrene chain, while the tensile strength buildup was dependent on the annealing time to the 0.51 +/- 0.05 power. The tensile strength curve as a function of annealing time goes through a maximum and then levels off. Finally, the diffusion coefficient from the SANS data was (4.7 +/- 1.0) x 10(-16) cm2/s at the scattering vector Q = 0.0067 angstrom-1. C1 LEHIGH UNIV, CTR POLYMER SCI & ENGN, BETHLEHEM, PA 18015 USA. LEHIGH UNIV, MAT RES CTR, BETHLEHEM, PA 18015 USA. LEHIGH UNIV, DEPT CHEM ENGN, BETHLEHEM, PA 18015 USA. LEHIGH UNIV, DEPT MAT SCI & ENGN, BETHLEHEM, PA 18015 USA. LEHIGH UNIV, INST EMULS POLYMER, WHITAKER LAB 5, BETHLEHEM, PA 18015 USA. OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA. RP LEHIGH UNIV, CTR POLYMER INTERFACES, BETHLEHEM, PA 18015 USA. OI Wignall, George/0000-0002-3876-3244 NR 46 TC 75 Z9 75 U1 1 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0024-9297 EI 1520-5835 J9 MACROMOLECULES JI Macromolecules PD AUG 16 PY 1993 VL 26 IS 17 BP 4624 EP 4631 DI 10.1021/ma00069a032 PG 8 WC Polymer Science SC Polymer Science GA LT711 UT WOS:A1993LT71100032 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM GOMEZ, JJ CADENAS, Y GOPAL, G GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PEREVOZCHIKOV, V PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETROVICH, L PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADYE, T AGASI, E ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUDINOV, E BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DARBO, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM GOMEZ, JJ CADENAS, Y GOPAL, G GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUMENYUK, S GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PEREVOZCHIKOV, V PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PETROVICH, L PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SETTE, G SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TREILLE, D TREVISAN, U TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI SEARCH FOR Z(0) DECAYS TO 2 LEPTONS AND A CHARGED-PARTICLE ANTIPARTICLE PAIR SO NUCLEAR PHYSICS B LA English DT Note ID MONTE-CARLO SIMULATION; RADIATIVE-CORRECTIONS; FINAL-STATES; Z0 DECAYS; E+E; ENERGIES; MU+MU AB Based on a sample equivalent to 365000 hadronic Z0 decays, the search in DELPHI data for pairs of leptons accompanied by a pair of charged particles is described. A total of 11 events were found in the electron channel, 9 in the muon channel and 7 in the tau channel. Results on lepton pairs with a radiated photon are also presented. The data from all channels are compatible with the expectations from standard processes. However, one event was found in the tau channel with an unusually high mass of the charged particle pair. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM. ULB VUB,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV ETAT MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. INFN,I-40126 BOLOGNA,ITALY. COLL FRANCE,CNRS,IN2P3,PHYS CORPUSCULAIRE LAB,F-75231 PARIS 05,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. ULP,CNRS,IN2P3,CTR RECH NUCL,F-67037 STRASBOURG,FRANCE. 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UNIV COMPLUTENSE MADRID,E-28040 MADRID,SPAIN. UNIV AIX MARSEILLE 2,CPP,CNRS,IN2P3,F-13288 AIX EN PROVENCE 9,FRANCE. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. INFN,I-20133 MILAN,ITALY. NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK. CHARLES UNIV,NUCL CTR MFF,NC,CS-18000 PRAGUE 8,CZECHOSLOVAKIA. NATL INST NUCL PHYS & HIGH ENERGY PHYS,1009 DB AMSTERDAM,NETHERLANDS. NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE. UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY. UNIV OVIEDO,DEPT FIS,E-33006 OVIEDO,SPAIN. UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. INFN,I-35131 PADUA,ITALY. PONTIFICIA UNIV CATOLICA,DEPT FIS,BR-22453 RIO JANEIRO,BRAZIL. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY. CTR ETUD SACLAY,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. UNIV SALERNO,DIPARTIMENTO FIS,I-84100 SALERNO,ITALY. IST SUPER SANITA,IST NAZL FIS NUCL,I-00161 ROME,ITALY. UNIV CANTABRIA,CSIC,CEAFM,E-39006 SANTANDER,SPAIN. SERPUKOV HIGH ENERGY PHYS INST,SERPUKHOV,RUSSIA. J STEFAN INST,61000 LJUBLJANA,SLOVENIA. UNIV LJUBLJANA,DEPT PHYS,61000 LJUBLJANA,SLOVENIA. UNIV STOCKHOLM,FYSIKUM,S-11385 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS SPERIMENTALE,I-10125 TURIN,ITALY. INFN,I-10125 TURIN,ITALY. UNIV TRIESTE,DIPARTIMENTO FIS,I-34127 TRIESTE,ITALY. INFN,I-34127 TRIESTE,ITALY. UNIV UDINE,IST FIS,I-33100 UDINE,ITALY. UNIV UPPSALA,DEPT RADIAT SCI,S-75121 UPPSALA,SWEDEN. CSIC VALENCIA,JFIC,E-46100 BURJASSOT,SPAIN. UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. UNIV WARSAW,PL-00681 WARSAW,POLAND. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV GESAMTHSCH WUPPERTAL,FACHBEREICH PHYS,W-5600 WUPPERTAL 1,GERMANY. RP ABREU, P (reprint author), FCUL,IST,LIP,AV ELIAS GARCIA 14-10,P-1000 LISBON,PORTUGAL. RI de Groot, Nicolo/A-2675-2009; Nomerotski, Andrei/A-5169-2010; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Torassa, Ezio/I-1788-2012; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Andreazza, Attilio/E-5642-2011; Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Smirnova, Oxana/A-4401-2013; Fernandez-Alonso, Mercedes/F-2557-2016; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; Contreras Gonzalez, Jose Luis/K-7255-2014; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Barrio, Juan/L-3227-2014; Zaitsev, Alexandre/B-8989-2017; Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Tome, Bernardo/J-4410-2013; Fernandez, Ester/K-9734-2014; Pimenta, Mario/M-1741-2013; Roditi, Itzhak/O-7448-2014 OI Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; Andreazza, Attilio/0000-0001-5161-5759; Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Smirnova, Oxana/0000-0003-2517-531X; Fernandez-Alonso, Mercedes/0000-0002-1311-5275; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Barrio, Juan/0000-0002-0965-0259; Zaitsev, Alexandre/0000-0002-4961-8368; Vaz, Pedro/0000-0002-7186-2359; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Tome, Bernardo/0000-0002-7564-8392; Pimenta, Mario/0000-0002-2590-0908; Roditi, Itzhak/0000-0003-2363-5626 NR 21 TC 6 Z9 6 U1 0 U2 7 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 AUG 16 PY 1993 VL 403 IS 1-2 BP 3 EP 24 DI 10.1016/0550-3213(93)90027-M PG 22 WC Physics, Particles & Fields SC Physics GA LT307 UT WOS:A1993LT30700001 ER PT J AU FARAGGI, AE AF FARAGGI, AE TI ASPECTS OF NON-RENORMALIZABLE TERMS IN A SUPERSTRING DERIVED STANDARD-LIKE MODEL SO NUCLEAR PHYSICS B LA English DT Article ID FERMIONIC-STRING MODELS; 4-DIMENSIONAL SUPERSTRINGS; NONRENORMALIZABLE TERMS; SYMMETRY-BREAKING; ORBIFOLDS; CONSTRUCTION; COMPACTIFICATIONS AB I investigate the role of non-renormalizable terms, up to order N = 8, in a superstring derived standard-like model. I argue that non-renormalizable terms restrict the gauge symmetry, at the Planck scale, to be SU(3) X SU(2) X U(1)B-L X U(1)T3R rather than SU(3) X Su(2) X U(1)Y. I show that breaking the gauge symmetry directly to the Standard Model leads to breaking of supersymmetry at the Planck scale, or to dimension four, baryon and lepton violating, operators. I show that if the gauge symmetry is broken directly to the Standard Model the cubic-level solution to the F and D flatness constraints is violated by higher-order terms, while if U(1)Z, remains unbroken at the Planck scale, the cubic-level solution is valid to all orders of non-renormalizable terms. I discuss the Higgs and fermion mass spectrum. I demonstrate that realistic, hierarchical, fermion mass spectrum can be generated in this model. C1 WEIZMANN INST SCI,DEPT PHYS,IL-76100 REHOVOT,ISRAEL. RP FARAGGI, AE (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305, USA. NR 46 TC 100 Z9 100 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 AUG 16 PY 1993 VL 403 IS 1-2 BP 101 EP 121 DI 10.1016/0550-3213(93)90030-S PG 21 WC Physics, Particles & Fields SC Physics GA LT307 UT WOS:A1993LT30700004 ER PT J AU GROSS, DJ TAYLOR, W AF GROSS, DJ TAYLOR, W TI TWISTS AND WILSON LOOPS IN THE STRING THEORY OF 2-DIMENSIONAL QCD SO NUCLEAR PHYSICS B LA English DT Article ID LATTICE GAUGE-THEORY; LARGE-N LIMIT; YANG-MILLS THEORY; PHASE-TRANSITION; PLANAR DIAGRAMS; RANDOM SURFACES; U(N) INTEGRALS; MULTICOLOR QCD; 2 DIMENSIONS; AVERAGES AB The string theory that describes two-dimensional QCD in an asymptotic 1/N expansion is investigated further. A complete geometrical description of the QCD partition function on an arbitrary manifold is given in terms of maps from a two-dimensional orientable surface onto the target space. This includes correction terms that arise on surfaces with genus G not-equal 1, which are described geometrically by the insertion of extra ''twist'' points in the covering maps. In addition, the formalism is derived for calculating the vacuum expectation value of an arbitrary product of Wilson loops on an arbitrary two-dimensional manifold in terms of maps from an open string world sheet onto the target space. C1 CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP GROSS, DJ (reprint author), PRINCETON UNIV,JOSEPH HENRY LABS,PRINCETON,NJ 08544, USA. NR 30 TC 176 Z9 177 U1 0 U2 2 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 AUG 16 PY 1993 VL 403 IS 1-2 BP 395 EP 449 DI 10.1016/0550-3213(93)90042-N PG 55 WC Physics, Particles & Fields SC Physics GA LT307 UT WOS:A1993LT30700016 ER PT J AU ALEXANDER, FJ HABIB, S AF ALEXANDER, FJ HABIB, S TI STATISTICAL-MECHANICS OF KINKS IN 1+1 DIMENSIONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID STRUCTURAL PHASE-TRANSITIONS; PAIR PRODUCTION; FIELDS AB We investigate the thermal equilibrium properties of kinks in a classical phi4 field theory in 1 + 1 dimensions. The distribution function, kink density, and correlation function are determined from large scale simulations. A dilute gas description of kinks is shown to be valid below a characteristic temperature. A double Gaussian approximation to evaluate the eigenvalues of the transfer operator enables us to extend the theoretical analysis to higher temperatures where the dilute gas approximation fails. This approach accurately predicts the temperature at which the kink description breaks down. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP ALEXANDER, FJ (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545, USA. NR 22 TC 29 Z9 29 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 AUG 16 PY 1993 VL 71 IS 7 BP 955 EP 958 DI 10.1103/PhysRevLett.71.955 PG 4 WC Physics, Multidisciplinary SC Physics GA LR901 UT WOS:A1993LR90100002 ER PT J AU ANTHONY, PL ARNOLD, RG BAND, HR BOREL, H BOSTED, PE BRETON, V CATES, GD CHUPP, TE DIETRICH, FS DUNNE, J ERBACHER, R FELLBAUM, J FONVIEILLE, H GEARHART, R HOLMES, R HUGHES, EW JOHNSON, JR KAWALL, D KEPPEL, C KUHN, SE LOMBARDNELSEN, RM MARRONCLE, J MARUYAMA, T MEYER, W MEZIANI, ZE MIDDLETON, H MORGENSTERN, J NEWBURY, NR PETRATOS, GG PITTHAN, R PREPOST, R ROBLIN, Y ROCK, SE ROKNI, SH SHAPIRO, G SMITH, T SOUDER, PA SPENGOS, M STALEY, F STUART, LM SZALATA, ZM TERRIEN, Y THOMPSON, AK WHITE, JL WOODS, M XU, J YOUNG, CC ZAPALAC, G AF ANTHONY, PL ARNOLD, RG BAND, HR BOREL, H BOSTED, PE BRETON, V CATES, GD CHUPP, TE DIETRICH, FS DUNNE, J ERBACHER, R FELLBAUM, J FONVIEILLE, H GEARHART, R HOLMES, R HUGHES, EW JOHNSON, JR KAWALL, D KEPPEL, C KUHN, SE LOMBARDNELSEN, RM MARRONCLE, J MARUYAMA, T MEYER, W MEZIANI, ZE MIDDLETON, H MORGENSTERN, J NEWBURY, NR PETRATOS, GG PITTHAN, R PREPOST, R ROBLIN, Y ROCK, SE ROKNI, SH SHAPIRO, G SMITH, T SOUDER, PA SPENGOS, M STALEY, F STUART, LM SZALATA, ZM TERRIEN, Y THOMPSON, AK WHITE, JL WOODS, M XU, J YOUNG, CC ZAPALAC, G TI DETERMINATION OF THE NEUTRON SPIN STRUCTURE-FUNCTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID DEEP-INELASTIC-SCATTERING; ELECTRON-SCATTERING; POLARIZED ELECTROPRODUCTION; GLOBAL ANALYSIS; CROSS-SECTIONS; HE-3 TARGETS; HIGH-DENSITY; SUM-RULE; E-P; PROTON AB The spin structure function of the neutron g1n has been determined over the range 0.03 < x < 0.6 at an average Q2 of 2 (GeV/c)2 by measuring the asymmetry in deep inelastic scattering of polarized electrons from a polarized He-3 target at energies between 19 and 26 GeV. The integral of the neutron spin structure function is found to be integral-1/0 g1n(x)dx = -0.022 +/- 0.011. Earlier reported proton results together with the Bjorken sum rule predict integral-1/0 g1n(x)dx = -0.059 +/- 0.01 9. C1 UNIV CLERMONT FERRAND,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,PHYS CORPUSCULAIRE LAB,F-63170 CLERMONT FERRAND,FRANCE. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. CENS,DEPT PHYS NUCL,F-91191 GIF SUR YVETTE,FRANCE. HARVARD UNIV,CAMBRIDGE,MA 02138. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV MICHIGAN,ANN ARBOR,MI 48109. OLD DOMINION UNIV,NORFOLK,VA 23508. PRINCETON UNIV,PRINCETON,NJ 08544. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. STANFORD UNIV,STANFORD,CA 94305. SYRACUSE UNIV,SYRACUSE,NY 13244. UNIV WISCONSIN,MADISON,WI 53706. RP ANTHONY, PL (reprint author), AMERICAN UNIV,WASHINGTON,DC 20016, USA. NR 34 TC 420 Z9 421 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 16 PY 1993 VL 71 IS 7 BP 959 EP 962 DI 10.1103/PhysRevLett.71.959 PG 4 WC Physics, Multidisciplinary SC Physics GA LR901 UT WOS:A1993LR90100003 ER PT J AU BITTER, M HSUAN, H BUSH, C COHEN, S CUMMINGS, CJ GREK, B HILL, KW SCHIVELL, J ZARNSTORFF, M BEIERSDORFER, P OSTERHELD, A SMITH, A FRAENKEL, B AF BITTER, M HSUAN, H BUSH, C COHEN, S CUMMINGS, CJ GREK, B HILL, KW SCHIVELL, J ZARNSTORFF, M BEIERSDORFER, P OSTERHELD, A SMITH, A FRAENKEL, B TI SPECTRA OF HELIUM-LIKE KRYPTON FROM TOKAMAK FUSION TEST REACTOR PLASMAS SO PHYSICAL REVIEW LETTERS LA English DT Article ID ITER; IMPURITIES AB Experiments were conducted on TFTR to study the radiation of krypton which will be important for future tokamaks, such as ITER, for the diagnostic of the central ion temperature and for the control of the energy release from the plasma by radiative cooling. The total krypton radiation was monitored, and satellite spectra of KrXXXV were recorded with a high-resolution crystal spectrometer. Radiative cooling and reduced particle recycling at the plasma edge region were observed, in reasonable agreement with modeling calculations which included radial transport. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. LOCK HAVEN UNIV,LOCK HAVEN,PA 17745. HEBREW UNIV JERUSALEM,JERUSALEM,ISRAEL. RP BITTER, M (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08544, USA. NR 17 TC 38 Z9 39 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 AUG 16 PY 1993 VL 71 IS 7 BP 1007 EP 1010 DI 10.1103/PhysRevLett.71.1007 PG 4 WC Physics, Multidisciplinary SC Physics GA LR901 UT WOS:A1993LR90100015 ER PT J AU ROBERTS, DW KAITA, R LEVINTON, F ASAKURA, N BELL, R CHANCE, M DUPERREX, P GAMMEL, G HATCHER, R HOLLAND, A KAYE, S KESSEL, C KUGEL, H LEBLANC, B MANICKAM, J OKABAYASHI, M PAUL, S POMPHREY, N POWELL, E SAUTHOFF, N SESNIC, S TAKAHASHI, H WHITE, R AF ROBERTS, DW KAITA, R LEVINTON, F ASAKURA, N BELL, R CHANCE, M DUPERREX, P GAMMEL, G HATCHER, R HOLLAND, A KAYE, S KESSEL, C KUGEL, H LEBLANC, B MANICKAM, J OKABAYASHI, M PAUL, S POMPHREY, N POWELL, E SAUTHOFF, N SESNIC, S TAKAHASHI, H WHITE, R TI EFFECT OF INTERNAL MAGNETIC-STRUCTURE ON ENERGETIC ION CONFINEMENT IN TOKAMAKS SO PHYSICAL REVIEW LETTERS LA English DT Article ID PITCH-ANGLE MEASUREMENTS; HIGH-BETA; PLASMAS; MODE AB For the tokamak magnetic confinement concept, theory has predicted a distinct relationship between the plasma shape, the internal magnetic structure, and the presence or absence of fast ion losses in the presence of plasma instabilities. We have, for the first time, carried out measurements of the magnetic safety factor profile, q(r), in plasmas unstable to a specific instability, the so-called ''fishbone'' mode. The experimental equilibria reconstructed from these data have been used to demonstrate that when the plasma is unstable to fishbones, the fast ion confinement properties depend strongly on the radius of the magnetic surface where q(r) = 1. C1 PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08544. RI pomphrey, neil/G-4405-2010 NR 17 TC 4 Z9 4 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 AUG 16 PY 1993 VL 71 IS 7 BP 1011 EP 1014 DI 10.1103/PhysRevLett.71.1011 PG 4 WC Physics, Multidisciplinary SC Physics GA LR901 UT WOS:A1993LR90100016 ER PT J AU COFFEY, D BEDELL, KS AF COFFEY, D BEDELL, KS TI NONANALYTIC CONTRIBUTIONS TO THE SELF-ENERGY AND THE THERMODYNAMICS OF 2-DIMENSIONAL FERMI LIQUIDS SO PHYSICAL REVIEW LETTERS LA English DT Article ID 2D HUBBARD-MODEL; ANTIFERROMAGNETIC METALS; SPIN FLUCTUATIONS; DIMENSIONS; STATE; SCATTERING; BEHAVIOR; DENSITY AB We calculate the entropy of a two-dimensional Fermi liquid using a model with a contact interaction between fermions. We find that there are T2 contributions to the entropy from interactions separate from those due to the collective modes. These T2 contributions arise from nonanalytic corrections to the real part of the self-energy which may be calculated from the leading-log dependence of the imaginary part of the self-energy through the Kramers-Kronig relation. We find no evidence of a breakdown in Fermi liquid theory in 2D and conclude that Ferrmi liquids in 2D are similar to 3D Fermi liquids. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP COFFEY, D (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,MS-K765,LOS ALAMOS,NM 87545, USA. NR 22 TC 43 Z9 43 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 AUG 16 PY 1993 VL 71 IS 7 BP 1043 EP 1046 DI 10.1103/PhysRevLett.71.1043 PG 4 WC Physics, Multidisciplinary SC Physics GA LR901 UT WOS:A1993LR90100024 ER PT J AU GEHRING, PM HIROTA, K MAJKRZAK, CF SHIRANE, G AF GEHRING, PM HIROTA, K MAJKRZAK, CF SHIRANE, G TI ORIGIN OF THE 2ND LENGTH SCALE ABOVE THE MAGNETIC-SPIRAL PHASE OF TB SO PHYSICAL REVIEW LETTERS LA English DT Article ID X-RAY-SCATTERING AB High q-resolution neutron-scattering measurements of the critical scattering in Tb above the magnetic-spiral phase transition temperature T(s) exhibit a two-component line shape, as recently documented in Ho. This implies the existence of a second length scale. By using a narrow beam only 300 mum wide, and then translating the crystal through the beam, we have established that the origin of the second length scale lies within the near-surface volume or ''skin'' of the Tb crystal. This is manifested by a large enhancement of the scattering intensity at the c-axis face of the cube-shaped crystal. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP GEHRING, PM (reprint author), NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899, USA. RI Hirota, Kazuma/C-6797-2008; OI Gehring, Peter/0000-0002-9236-2046 NR 12 TC 65 Z9 65 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 AUG 16 PY 1993 VL 71 IS 7 BP 1087 EP 1090 DI 10.1103/PhysRevLett.71.1087 PG 4 WC Physics, Multidisciplinary SC Physics GA LR901 UT WOS:A1993LR90100035 ER PT J AU TSUEI, KD JOHNSON, PD AF TSUEI, KD JOHNSON, PD TI BONDING BETWEEN ALKALI ATOMS AND METAL SUBSTRATES PROBED BY SOFT-X-RAY EMISSION SO PHYSICAL REVIEW LETTERS LA English DT Article ID SURFACES; PHOTOEMISSION; CHEMISORPTION; POTASSIUM; NI(111); SPECTRA; LEVEL AB We have studied the bonding of K and Cs to Ni and Cu metal surfaces by examining the soft-x-ray emission from the K 3p and Cs 5p core holes. The localization of the core hole allows a measurement of the coverage dependence of the valence states specifically associated with the alkali atom. The energy distribution of these states shows, certainly in the case of Ni, that the substrate d(z)2 state plays a non-negligible role in the chemical bonding. Further for Ni, the quasi-two-dimensional metalization of the alkali overlayers was clearly observed. RP TSUEI, KD (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 22 TC 7 Z9 7 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 16 PY 1993 VL 71 IS 7 BP 1099 EP 1102 DI 10.1103/PhysRevLett.71.1099 PG 4 WC Physics, Multidisciplinary SC Physics GA LR901 UT WOS:A1993LR90100038 ER PT J AU LAPLACA, SJ BRINGLEY, JF SCOTT, BA COX, DE AF LAPLACA, SJ BRINGLEY, JF SCOTT, BA COX, DE TI STRUCTURE OF LA2CU2O5 BY HIGH-RESOLUTION SYNCHROTRON X-RAY-POWDER DIFFRACTION SO ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS LA English DT Article ID COPPER OXIDES; SERIES AB Dicopper(II) dilanthanum pentaoxide, La2Cu2O5, M(r) = 484.90, orthorhombic, Pbam. At T = 300 K: a = 5.5490 (1), b = 10.4774 (2), c = 3.8796 (1) angstrom, V = 225.557 (8) angstrom3, Z = 2, D(x) = 7.139 g cm-3, lambda = 1.2000 angstrom. Final R(I) = 6.20, R(p) = 14.6 and R(wp) = 20.61%, 124 independent reflections observed. The structure has been refined from high-resolution synchrotron X-rav powder diffraction data using the Rietveld method. It is of the oxygen-defect perovskite type and is composed entirely of corner-shared CuO5 square pyramids, which share oxygen vacancies forming vacancy tunnels along the c axis. The La atoms reside at a perovskite-like A-site and are tenfold coordinated by oxygen. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP LAPLACA, SJ (reprint author), IBM CORP,THOMAS J WATSON RES CTR,DIV RES,YORKTOWN HTS,NY 10598, USA. NR 10 TC 25 Z9 25 U1 0 U2 2 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0108-2701 J9 ACTA CRYSTALLOGR C JI Acta Crystallogr. Sect. C-Cryst. Struct. Commun. PD AUG 15 PY 1993 VL 49 BP 1415 EP 1417 DI 10.1107/S0108270193001891 PN 8 PG 3 WC Chemistry, Multidisciplinary; Crystallography SC Chemistry; Crystallography GA LY133 UT WOS:A1993LY13300001 ER PT J AU SPANGLER, BD HEERZE, LD CLARK, CG ARMSTRONG, GD AF SPANGLER, BD HEERZE, LD CLARK, CG ARMSTRONG, GD TI HYDROPHOBIC BINDING OF PERTUSSIS TOXIN IS ENHANCED BY OLIGOSACCHARIDE RECEPTORS SO ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS LA English DT Article ID CARBOHYDRATE RECOGNITION DOMAINS; BORDETELLA-PERTUSSIS; AFFINITY-CHROMATOGRAPHY; CELL; PURIFICATION; ADHERENCE; SUBUNIT; MODEL C1 UNIV ALBERTA,DEPT MED MICROBIOL & INFECT DIS,EDMONTON T6G 2H7,ALBERTA,CANADA. ARGONNE NATL LAB,DIV BIOL & MED RES,ARGONNE,IL 60439. NR 28 TC 8 Z9 8 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 0003-9861 J9 ARCH BIOCHEM BIOPHYS JI Arch. Biochem. Biophys. PD AUG 15 PY 1993 VL 305 IS 1 BP 153 EP 158 DI 10.1006/abbi.1993.1405 PG 6 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA LT024 UT WOS:A1993LT02400020 PM 7688202 ER PT J AU SIMON, SI ROCHON, YP LYNAM, EB SMITH, CW ANDERSON, DC SKLAR, LA AF SIMON, SI ROCHON, YP LYNAM, EB SMITH, CW ANDERSON, DC SKLAR, LA TI BETA-2-INTEGRIN AND L-SELECTIN ARE OBLIGATORY RECEPTORS IN NEUTROPHIL AGGREGATION SO BLOOD LA English DT Note ID NODE HOMING RECEPTOR; INCREASED SURFACE EXPRESSION; ADHESION MOLECULE; TRANSENDOTHELIAL MIGRATION; CHEMOTACTIC FACTORS; FLOW-CYTOMETRY; ADHERENCE; INVIVO; MAC-1; ENDOTHELIUM C1 UNIV NEW MEXICO,CTR CANC,SCH MED,DEPT PATHOL,DIV CYTOMETRY,ALBUQUERQUE,NM 87131. LOS ALAMOS NATL LAB,NATL FLOW CYTOMETRY RESOURCE,LOS ALAMOS,NM 87544. UPJOHN LABS,DISCOVERY RES,KALAMAZOO,MI. RP SIMON, SI (reprint author), BAYLOR UNIV,SCH MED,DIV LEUKOCYTE BIOL,HOUSTON,TX 77030, USA. FU NHLBI NIH HHS [HL-43026]; NIAID NIH HHS [AI-31652]; NIGMS NIH HHS [GM37696] NR 48 TC 81 Z9 82 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0006-4971 J9 BLOOD JI Blood PD AUG 15 PY 1993 VL 82 IS 4 BP 1097 EP 1106 PG 10 WC Hematology SC Hematology GA LT742 UT WOS:A1993LT74200007 PM 7688987 ER PT J AU PAPA, V GLIOZZO, B CLARK, GM MCGUIRE, WL MOORE, D FUJITAYAMAGUCHI, Y VIGNERI, R GOLDFINE, ID PEZZINO, V AF PAPA, V GLIOZZO, B CLARK, GM MCGUIRE, WL MOORE, D FUJITAYAMAGUCHI, Y VIGNERI, R GOLDFINE, ID PEZZINO, V TI INSULIN-LIKE GROWTH FACTOR-I RECEPTORS ARE OVEREXPRESSED AND PREDICT A LOW-RISK IN HUMAN BREAST-CANCER SO CANCER RESEARCH LA English DT Article ID SOMATOMEDIN RECEPTOR; BINDING-PROTEINS; FLOW-CYTOMETRY; CELL-LINES; IGF-I; EXPRESSION; RADIOIMMUNOASSAY; APPLICABILITY; SOMATOSTATIN; CARCINOMA AB IGF-I receptor (IGFR) content and its prognostic significance were evaluated in human breast cancer specimens using a sensitive and specific radioimmunoassay (V. Pezzino et al., Metabolism, 40: 861, 1991). The prognostic significance of IGFR expression was investigated by two different approaches: (a) detectable IGFR content was measured in 82% of specimens in a consecutive series of 184 human breast cancers and in 32% of 19 normal breast tissues. The average IGFR content in breast cancer was nearly 10-fold higher than the value observed in normal breast tissue (7.6. +/- 0.8 versus 0.8 +/- 0.1 ng/0.1 mg protein, mean +/- SEM; P < 0.001). IGFR content was positively correlated with estrogen (ER) and insulin receptor content (r = 0.269 and 0.515, respectively, Pearson correlation) but not with progesterone receptors (PR). No significant correlation was observed between IGFR content and a variety of tumor parameters (tumor size, lymph node involvement, grade) and host characteristics (age, body mass index, menopausal status); (b) IGFR content was measured in a noncontinuous series of 265 primary breast cancer specimens subdivided into 136 high-risk and 129 low-risk specimens on the basis of being either negative (ER-/PR-/aneuploid/high S-phase) or positive (ER+/PR+/diploid/low S-phase) for four well-established prognostic factors. IGFR levels were significantly higher in the low-risk group (6.4 +/- 0.4 ng/0.1 mg protein, mean +/- SEM) than in the high-risk group (3.6 +/- 0.5; P < 0.0001, Wilcoxon sum rank test). In summary, our data indicate that there is an elevated IGFR content in most human breast cancers compared with normal breast tissue and that an elevated IGFR content is a favorable prognostic indicator. C1 UNIV TEXAS,HLTH SCI CTR,DEPT MED,SAN ANTONIO,TX 78284. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. CITY HOPE NATL MED CTR,BECKMAN RES INT,DUARTE,CA 91010. UNIV CALIF SAN FRANCISCO,MT ZION MED CTR,SAN FRANCISCO,CA 94120. RP PAPA, V (reprint author), UNIV CATANIA,CATTEDRA ENDOCRINOL,I-95124 CATANIA,ITALY. FU NCI NIH HHS [CA 52582] NR 38 TC 171 Z9 176 U1 0 U2 1 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 0008-5472 J9 CANCER RES JI Cancer Res. PD AUG 15 PY 1993 VL 53 IS 16 BP 3736 EP 3740 PG 5 WC Oncology SC Oncology GA LR765 UT WOS:A1993LR76500018 PM 8339284 ER PT J AU MCCANN, MP CHEN, CH DATSKOU, I EVANS, S AF MCCANN, MP CHEN, CH DATSKOU, I EVANS, S TI 2-PHOTON SPECTROSCOPY OF MOLECULAR-OXYGEN SO CHEMICAL PHYSICS LA English DT Article ID RYDBERG-VALENCE INTERACTIONS; SHAPE RESONANCE; IONIZATION SPECTROSCOPY; MULTIPHOTON IONIZATION; NITRIC-OXIDE; O-2; STATES; PHOTOIONIZATION; BEHAVIOR; SPECTRA AB Two-photon transitions are examined in molecular oxygen in the region of 8 to 9 eV. Two-photon spectra are presented and absolute two-photon absorption constants are tabulated. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. NR 30 TC 6 Z9 6 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0104 J9 CHEM PHYS JI Chem. Phys. PD AUG 15 PY 1993 VL 174 IS 3 BP 417 EP 424 DI 10.1016/0301-0104(93)80008-W PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LT381 UT WOS:A1993LT38100008 ER PT J AU SOMMERER, SO BAKER, JD JENSEN, WP HAMZA, A JACOBSON, RA AF SOMMERER, SO BAKER, JD JENSEN, WP HAMZA, A JACOBSON, RA TI THE X-RAY STRUCTURE-ANALYSIS OF BIS-2,2',N,N'-BIPYRIDYL KETONE COBALT(III) NITRATE DIHYDRATE SO INORGANICA CHIMICA ACTA LA English DT Article ID DIFFERENTIAL-OVERLAP TECHNIQUE; TRANSITION-METAL COMPLEXES; INTERMEDIATE NEGLECT; DI-2-PYRIDYL KETONE; SPECTROSCOPY; RUTHENIUM; CHLORIDE; SPECTRA AB An X-ray structural analysis of bis-2,2',N,N'-bipyridyl ketone cobalt(III) nitrate dihydrate, CoC22H20N4O4+. NO3-.2H2O, M(r)=559.38 g/mol, P1BAR, a=8.862(2), b=16.195(3), c=8.772(2) angstrom, alpha=103.54(2), beta=95.74(3), gamma=105.07-degrees, V=1164.4(4) angstrom3, Z=2, D(x)=1.595 g/cm3, Mo Kalpha radiation (lambda=0.71073 angstrom), mu=7.8 cm 1 and R = 0.079, revealed a Co(III) cation in a slightly distorted octahedral environment. The structure reveals that the ligand di-2-pyridyl ketone (dpk) has undergone a hydration reaction across the ketone double bond and one of the hydrate oxygen atoms coordinated to the metal forming a tridentate chelate. This new Co(dpk-hydrate)2+ complex displays the least distorted geometry yet reported for either 1:1 or 1:2 (metal:ligand) complexes. A geometry optimization using the INDO model Hamiltonian as implemented in the program ZINDO was performed on the title complex with the Co3+ modeled as a singlet. The result of the computation corroborates the geometry of the title complex as that expected for Co3+. C1 USDA ARS,GAINESVILLE,FL 32608. S DAKOTA STATE UNIV,DEPT CHEM,BROOKINGS,SD 57007. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP SOMMERER, SO (reprint author), PENN STATE UNIV,BEHREND COLL,STN RD,ERIE,PA 16563, USA. NR 14 TC 32 Z9 32 U1 1 U2 2 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 AUG 15 PY 1993 VL 210 IS 2 BP 173 EP 176 DI 10.1016/S0020-1693(00)83324-1 PG 4 WC Chemistry, Inorganic & Nuclear SC Chemistry GA LW795 UT WOS:A1993LW79500007 ER PT J AU HEBNER, GA AF HEBNER, GA TI FISSION-FRAGMENT EXCITATION OF THE HIGH-PRESSURE ATOMIC NEON LASER AT 703.2 AND 724.5 NM SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID XENON; MIXTURES; STATES AB The results of a parametric investigation of the high-pressure fission-fragment excited atomic neon laser operating on the 703.2-nm (3p[1/2]1-->3s[3/2]2(0)) and 724.5-nm (3p[1/2]1-->3s[3/2]1(0)) transitions in He/Ne/Ar and He/Ne/Kr gas mixtures are reported. The highest measured power efficiency was 0.12% using a 1550-Torr He/Ne/Kr (17/75/8) gas mixture at a pump power of 1 kW/cm3. The power efficiency and the ratio of the 703.2- to the 724.5-nm laser output as a function of total pressure, He/Ne ratio, and percent of Ar or Kr will be discussed. RP HEBNER, GA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 38 TC 5 Z9 5 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1993 VL 74 IS 4 BP 2203 EP 2207 DI 10.1063/1.354727 PG 5 WC Physics, Applied SC Physics GA LT183 UT WOS:A1993LT18300008 ER PT J AU PIETSCH, U METZGER, H RUGEL, S JENICHEN, B ROBINSON, IK AF PIETSCH, U METZGER, H RUGEL, S JENICHEN, B ROBINSON, IK TI DEPTH-RESOLVED MEASUREMENT OF LATTICE-RELAXATION IN GA1-XINXAS/GAAS STRAINED-LAYER SUPERLATTICES BY MEANS OF GRAZING-INCIDENCE X-RAY-DIFFRACTION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID HETEROSTRUCTURES; SURFACES; GAAS AB The state of relaxation in two different superlattices (SLs) of a system with large lattice mismatch, Ga0.8In0.2As/GaAs grown on GaAs [001] by molecular beam epitaxy, has been investigated by surface-sensitive grazing-incidence diffraction (GID). The SL is squeezed between the substrate and a thick GaAs top layer. The thickness of individual GaInAs layers t(a) (active layer) is the same in both samples, while the GaAs barrier thickness t(b) is different. We have studied the influence of the thickness ratio t(b)/t(a) on the state of relaxation for different distances from the sample surface. We find that for thick barriers the whole SL remains coherently strained and for the thinner barrier thickness the SL is partially relaxed against the the GaAs top layer. The GID technique was applied for the first time to obtain depth resolution of the lateral lattice parameter in a SL. It is demonstrated to be especially well suited for SL systems with a small difference of the average electron density between the sublayers. The scattering contrast is improved by measuring the intensity as a function of the exit angle (''rod scans'') from the ''weak'' (200) Bragg reflection. Comparing computer simulations with the measured variation of the scattering contrast between GaAs and GaInAs layers obtained from different ''information depths'' and at different angular positions of the in-plane rocking curves, the state of relaxation can quantitatively be evaluated. On the basis of these results we propose two models for the partial relaxation of the SL into the state of strain-reduced domains. We believe that the partial relaxation is due to the elastic field interaction between the GaInAs layers accross the GaAs barriers, if t(b) is small. C1 UNIV MUNICH,SEKT PHYS,D-80539 MUNICH,GERMANY. PAUL DRUDE INST FESTKORPERELEKTR,D-10117 BERLIN,GERMANY. AT&T BELL LABS,BROOKHAVEN NATL LAB,UPTON,NY 11973. RP PIETSCH, U (reprint author), UNIV POTSDAM,FACHBEREICH PHYS,NEUEN PALAIS 10,D-14415 POTSDAM,GERMANY. NR 17 TC 57 Z9 59 U1 1 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1993 VL 74 IS 4 BP 2381 EP 2387 DI 10.1063/1.354724 PG 7 WC Physics, Applied SC Physics GA LT183 UT WOS:A1993LT18300033 ER PT J AU PUGH, JR MAO, DL ZHANG, JG HEBEN, MJ NELSON, AJ FRANK, AJ AF PUGH, JR MAO, DL ZHANG, JG HEBEN, MJ NELSON, AJ FRANK, AJ TI A METAL-P-N-CDTE SCHOTTKY-BARRIER SOLAR-CELL - PHOTOELECTROCHEMICAL GENERATION OF A SHALLOW P-TYPE REGION IN N-CDTE SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CADMIUM TELLURIDE; SURFACE OXIDATION; INTERFACE; HEIGHT; STABILIZATION; JUNCTIONS; CONTACTS; POLYMER; LAYERS; FILMS AB A simple method for producing a Au:p-n-CdTe Schottky barrier is described. The shallow p-n junction is formed by photoelectrochemical surface oxidization of n-CdTe. X-ray photoelectron spectroscopy, Auger electron spectroscopy depth profiling, and electron-beam-induced-current measurements provide important insight into the underlying causes of the formation of the p-type layer. Current-voltage and capacitance-voltage measurements show that the thin p-layer enhances the effective barrier height relative to that of a traditional Au:n-CdTe junction. These results account for the Au:p-n-CdTe cells exhibiting higher open-circuit photovoltages and higher photoconversion efficiencies than do Au:n-CdTe Schottky-barrier cells. From temperature dependence studies of the current-voltage characteristics, detailed information on the charge-transport mechanism of the junction was obtained. Photocurrent spectra of Au:p-n-CdTe as a function of temperature reveal that exciton excitation in CdTe contributes to the photocurrent. C1 NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401. NR 30 TC 13 Z9 13 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 AUG 15 PY 1993 VL 74 IS 4 BP 2619 EP 2625 DI 10.1063/1.354652 PG 7 WC Physics, Applied SC Physics GA LT183 UT WOS:A1993LT18300068 ER PT J AU MODINE, FA LUBBEN, D BATES, JB AF MODINE, FA LUBBEN, D BATES, JB TI ELECTRICAL-CONDUCTION IN CAF2 AND CAF2-AL2O3 NANOCOMPOSITE FILMS ON AL2O3 SUBSTRATES SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ENHANCED IONIC-CONDUCTION; COMPOSITE ELECTROLYTES; LITHIUM IODIDE; PARTICLE-SIZE; SAPPHIRE; SYSTEMS; PHASE AB Thin films of pure CaF2 and nanocomposite mixtures of Al2O3 with CaF2 were evaporated on Al2O3 substrates. Interdigital electrodes on some of the substrates allowed in situ measurements of the electrical conduction in the films during and subsequent to film growth. Electrical conduction was studied as a function of film thickness, film deposition rate, composition, time, and temperature. The electrical conductivity in pure CaF2 adjacent to an Al2O3 interface sometimes exceeded the bulk CaF2 conductivity (i.e., value at more than 50 nm distance) by as much as a factor of 6700 at 200-degrees-C. The high conductivity is characterized by an activation energy of 0.6 +/- 0.1 eV, which is significantly lower than the activation energy of about 1.0 eV for conduction in the bulk. However, this high conductivity is thermally unstable and diminishes in time. A high but stable conductivity was obtained in CaF2 films containing about 10 mol % Al2O3 as a dispersed second phase. At 200-degrees-C, a two-phase film gave a factor of 360 enhancement over the measured bulk CaF2 conductivity and a factor of 7 improvement over the best previously reported conductivity for CaF2-Al2O3 composite materials. The origin of enhanced conduction in CaF2 is attributed to ion transport along dislocations. Dislocations anneal with a characteristic log of time dependence that is recognizable in the annealing behavior of the electrical conductivity. Presumably, the addition of a dispersed second phase of Al2O3 to CaF2 serves both to generate and to pin dislocations; the electrical conductance is thereby enhanced and stabilized. RP MODINE, FA (reprint author), OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA. NR 28 TC 14 Z9 14 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1993 VL 74 IS 4 BP 2658 EP 2664 DI 10.1063/1.354657 PG 7 WC Physics, Applied SC Physics GA LT183 UT WOS:A1993LT18300073 ER PT J AU SOBEHART, JR AF SOBEHART, JR TI POLYIMIDE ABLATION USING INTENSE LASER-BEAMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID POLYMER ABLATION; UV; PULSES; PHOTOABLATION; TISSUE; FILMS AB The ablation of polyimide by intense UV laser beams is modeled with a photothermal process that considers the shielding of the laser beam by the decomposed polymer. The heating of the decomposed material may drive the polymer degradation process for fluences above several J/cm2. RP SOBEHART, JR (reprint author), LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,CNLS,MS B-258,LOS ALAMOS,NM 87545, USA. NR 28 TC 17 Z9 17 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1993 VL 74 IS 4 BP 2830 EP 2833 PG 4 WC Physics, Applied SC Physics GA LT183 UT WOS:A1993LT18300100 ER PT J AU FENG, Z KOMVOPOULOS, K BROWN, IG BOGY, DB AF FENG, Z KOMVOPOULOS, K BROWN, IG BOGY, DB TI EFFECT OF GRAPHITIC CARBON-FILMS ON DIAMOND NUCLEATION BY MICROWAVE-PLASMA-ENHANCED CHEMICAL-VAPOR-DEPOSITION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID GROWTH; RAMAN; SPECTROSCOPY; SILICON AB Diamond nucleation on very smooth (100) silicon substrates coated with thin films of a colloidal graphite suspension was investigated with a microwave-plasma-enhanced chemical-vapor-deposition system. Nucleation densities of the order of 10(6) cm-2 were obtained by coating the substrates with carbon films of thicknesses less than 1 mum. However, very low nucleation densities were obtained with carbon film thicknesses greater than 1 mum. The effect of the carbon film thickness on diamond nucleation was examined by measuring the etching rate of carbon films exposed to a hydrogen plasma and was further interpreted on the basis of scanning electron microscopy and Raman spectroscopy results. Etching of the original carbon may lead to the formation of a thin residual carbon film when the initial film thickness is less than a critical value. Results demonstrated that the high nucleation densities of good quality cubo-octahedral diamond crystals obtained with relatively thin carbon films were primarily due to the formation of a porous ultrathin residual carbon film. The critical initial film thickness was a function of the plasma etching and deposition rates of carbon which, in turn, affected the effective local carbon concentration. Thick carbon films yielded insignificant nucleation densities and poor quality diamond because of the high local carbon content resulting from the partial etching of carbon and the increased carbon concentration in the plasma. The local carbon concentration and the residual carbon film are the proposed principal factors for the obtained high diamond nucleation densities on unscratched silicon substrates. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP FENG, Z (reprint author), UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720, USA. NR 24 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 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 15 PY 1993 VL 74 IS 4 BP 2841 EP 2849 DI 10.1063/1.354636 PG 9 WC Physics, Applied SC Physics GA LT183 UT WOS:A1993LT18300102 ER PT J AU KNICKELBEIN, MB AF KNICKELBEIN, MB TI THE ABSORPTION-SPECTRA OF SMALL NICKEL CLUSTERS VIA PHOTODISSOCIATION - NINARM-]NIN+MAR SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID FLUORESCENCE EXCITATION SPECTRUM; TRANSITION-METAL CLUSTERS; ELECTRONIC-STRUCTURE; VANDERWAALS COMPLEXES; ATOM CLUSTERS; NI CLUSTERS; IONIZATION; CHEMISORPTION; ENERGIES; SPECTROSCOPY AB The photodissociation action spectra of Ni(n)Ar(m) (n = 3,4,5, and 7) have been recorded from 306 to 674 nm. The spectra are continuous, with cross sections which increase monotonically into the ultraviolet. It is observed that the photodissociation spectra recorded for Ni3Arm, Ni4Arm, and Ni5Arm are independent on m, indicating a negligible influence of the weakly bound argon atoms on the absorption spectra of the underlying clusters. The oscillator strengths increase monotonically with increasing cluster nuclearity (n) in accord with the Thomas-Reiche-Kuhn sum rule. The results are discussed from both molecular and classical electrodynamic points of view. RP KNICKELBEIN, MB (reprint author), ARGONNE NATL LAB, DIV CHEM, ARGONNE, IL 60439 USA. NR 58 TC 29 Z9 29 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 1993 VL 99 IS 4 BP 2377 EP 2382 DI 10.1063/1.466199 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600010 ER PT J AU NIU, BH BAI, Y SHIRLEY, DA AF NIU, BH BAI, Y SHIRLEY, DA TI HIGH-RESOLUTION PHOTOELECTRON-SPECTROSCOPY AND FEMTOSECOND INTRAMOLECULAR DYNAMICS OF H2CCO+ AND D2CCO+ SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR ELECTRONIC-SPECTRA; MANY-BODY APPROACH; VIBRATIONAL STRUCTURE; KETENE; PHOTOFRAGMENTATION; STATES; DISSOCIATION; FORMALDEHYDE; CH2(X3B1); ABINITIO AB High resolution helium la (584 angstrom) photoelectron spectra of H2CCO and D2CCO are reported. The present spectra of the ground states of ketene cations show more vibrational fine structure than previously reported. The adiabatic ionization energies (AIEs) of the cations' first, second, and fifth excited states are determined unambiguously. The doubletlike fine structures present in the first excited states of ketene cations imply the excitation of a ''soft'' mode that was not observed before. It was assigned to the nu5 mode, which is characterized by the CH2 (CD2) group out-of-plane wagging motion. The complexity of the photoelectron spectra obtained for the ionic first excited states is attributed to the possible dissociation and predissociation of this state. Strong isotope effects are observed in the vibronic (vibrational) couplings in most of the ionic states. Vibrational autocorrelation functions are calculated from the high-resolution photoelectron spectra for four of the six ionic states observed. The dynamics of the ground states of the cations are characterized by a wave packet oscillating with small amplitude around the minimum of the upper potential energy surfaces (PES). The decay dynamics of the ionic first and fifth excited states of ketene are characterized by ultrafast intramolecular processes such as dissociation and predissociation. C1 LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA. JILIN UNIV TECHNOL, DEPT CHEM, JILIN, PEOPLES R CHINA. RP NIU, BH (reprint author), UNIV CALIF BERKELEY, DEPT CHEM, 1 CYCLOTRON RD, BERKELEY, CA 94720 USA. NR 48 TC 17 Z9 17 U1 0 U2 7 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 AUG 15 PY 1993 VL 99 IS 4 BP 2520 EP 2532 DI 10.1063/1.465215 PG 13 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600025 ER PT J AU CONTINETTI, RE CYR, DR OSBORN, DL LEAHY, DJ NEUMARK, DM AF CONTINETTI, RE CYR, DR OSBORN, DL LEAHY, DJ NEUMARK, DM TI PHOTODISSOCIATION DYNAMICS OF THE N3 RADICAL SO JOURNAL OF CHEMICAL PHYSICS LA English DT Review ID POSITION-SENSITIVE DETECTOR; FLIGHT MASS-SPECTROMETER; 193 NM; DISSOCIATION DYNAMICS; CONICAL INTERSECTION; ENERGY-DISTRIBUTION; VECTOR CORRELATIONS; ELECTRON-AFFINITY; OXYGEN MOLECULES; AZIDE ANION AB The dissociation dynamics of the B2SIGMA(u)+ state of N3 were investigated using fast radical beam photodissociation coupled with a new coincidence wedge-and-strip-anode particle detector. With this detector, detailed photofragment kinetic energy and angular distributions can be measured as a function of excitation energy. Calibration of the detector by studies of the predissociation of the O2 B 3SIGMA(u)- state is discussed. Methods of extracting the center-of-mass kinetic energy and angular distributions are resented. The photodissociation results for N3 show that from the vibrationless level of the B 2SIGMA(u)+ state in N3, both spin-allowed [N3-->N(2D) +N2(1SIGMA(g)+)] and spin-forbidden [N3-->N(4S)+N2(1SIGMA(g)+)] dissociation processes occur. Bend excitation in the B 2SIGMA(u)+ state, however, enhances the spin-allowed dissociation process considerably. The kinetic energy distributions reveal partially resolved vibrational structure in the N2 fragment, and indicate substantial rotational excitation of the N2. This implies that bent geometries play a major role in the dissociation of the N3 B state. Possible mechanisms for the spin-forbidden and spin-allowed dissociation channels are discussed. C1 LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA. UNIV CALIF SAN DIEGO, DEPT CHEM, LA JOLLA, CA 92093 USA. RP UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. RI Osborn, David/A-2627-2009; Neumark, Daniel/B-9551-2009; OI Neumark, Daniel/0000-0002-3762-9473; Continetti, Robert/0000-0002-0685-4459 NR 101 TC 119 Z9 119 U1 2 U2 20 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 15 PY 1993 VL 99 IS 4 BP 2616 EP 2631 DI 10.1063/1.465224 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600034 ER PT J AU ODUTOLA, JA LESTER, WA GRIMES, RM AF ODUTOLA, JA LESTER, WA GRIMES, RM TI REORIENTATION CROSS-SECTIONS IN COLLISIONS OF HE(S-1)+H-2(B (1)SIGMA(U)(+) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ROTATIONALLY INELASTIC-COLLISIONS; POTENTIAL-ENERGY SURFACES; ELECTRONIC STATES; EXCITED-STATES; MRD-CI; MOLECULES; H-2(B1-SIGMA-U+); POLARIZATION; SCATTERING; SYSTEM AB Reorientation cross sections have been computed for the He(1S) + H-2(B 1SIGMA(u)+) system using a potential energy surface and model previously introduced for rovibrational energy transfer. The model consists of restricting the scattering solely to the excited state potential energy surface and the use of the coupled-channel method. The calculated reorientation cross section is 41.6 angstrom2 for the transition (vjm(j)=0,1,O --> v'j'm(j)'=0,1, +/- 1) at room temperature; the corresponding Boltzmann average is 39.2 angstrom2. The latter result is in very good agreement with a recent measurement by Pibel and Moore of 29.7 +/- 7.4 angstrom2 [j. Chem. Phys. 93,4804 (1990)]. C1 OBAFEMI AWOLOWO UNIV,DEPT CHEM,IFE,NIGERIA. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP ODUTOLA, JA (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA. NR 25 TC 4 Z9 4 U1 0 U2 0 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 AUG 15 PY 1993 VL 99 IS 4 BP 2632 EP 2637 DI 10.1063/1.465225 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600035 ER PT J AU SCAMEHORN, CA HESS, AC MCCARTHY, MI AF SCAMEHORN, CA HESS, AC MCCARTHY, MI TI CORRELATION CORRECTED PERIODIC HARTREE-FOCK STUDY OF THE INTERACTIONS BETWEEN WATER AND THE (001) MAGNESIUM-OXIDE SURFACE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ULTRATHIN MGO FILMS; HYDROGEN ADSORPTION; CORRELATION-ENERGY; MGO(001) SURFACE; MGO(100); LEED; MECHANISM; GAS; RELAXATION; DESORPTION AB A theoretical study of water adsorption on the surface of a three-layer (001) magnesium oxide film has been performed using periodic Hartree-Fock (PHF) theory with density-functional-based correlation corrections. The calculations treated two water molecules per MgO unit cell (one on each side of the film), and for most of the calculations, the size of the unit cell was chosen such that the ratio of water molecules to surface magnesium ions was 1:4. In these configurations the water dipoles were aligned parallel and the water-water spacing was 5.95 angstrom between molecules in neighboring cells. Nine geometries were examined, three of which were found to be strongly bound to the surface. The binding energies for the three bound configurations range from 4.1 to 8.9 kcal/mol at the PHF level of theory and 6.3 to 12.5 kcal/mol when correlation effects were included. For the two cases where the geometry of the bound water molecule was allowed to relax at the equilibrium water-film distance, the H-O-H angle increased 1-3-degrees from the 6-31G* free molecule value of 105.6-degrees and the 0-H bond distance did not change. The six remaining geometries did not show significant binding to the surface. Additional calculations were performed in which the dipoles of the water molecules were aligned antiparallel. These calculations indicate that as the coverage increases the water molecules will tend to form islands on the magnesium oxide surface rather than wet the surface. The formation of a fully hydroxylated surface (one hydroxyl group added to every surface magnesium ion and one hydrogen atom to every surface oxygen ion) was also examined, but was found to be energetically unfavorable. The energetic bias against dissociative chemistry on the clean MgO (001) surface, consisting of fully five coordinated ions, is in agreement with previously published ultraviolet photoemission spectroscopy, x-ray photoemission spectroscopy, and IR studies. RP SCAMEHORN, CA (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 43 TC 124 Z9 124 U1 1 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 AUG 15 PY 1993 VL 99 IS 4 BP 2786 EP 2795 DI 10.1063/1.465187 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600051 ER PT J AU FELLER, D GLENDENING, ED MCCULLOUGH, EA MILLER, RJ AF FELLER, D GLENDENING, ED MCCULLOUGH, EA MILLER, RJ TI A COMPARISON OF UNRESTRICTED HARTREE-FOCK-BASED AND RESTRICTED OPEN-SHELL HARTREE-FOCK-BASED METHODS FOR DETERMINING THE MAGNETIC HYPERFINE PARAMETERS OF NO (X2-PI) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID PLESSET PERTURBATION-THEORY; QUADRATIC CONFIGURATION-INTERACTION; MANY-BODY CALCULATIONS; COUPLING-CONSTANTS; BASIS-SETS; MOLECULAR CALCULATIONS; ABINITIO CALCULATION; CORRELATION ENERGIES; DIATOMIC-MOLECULES; WAVE-FUNCTIONS AB The magnetic hyperfine structure parameters of NO X 2PI have been determined through a variety of ab initio methods based on restricted and unrestricted Hartree-Fock zeroth order wave functions. Examples of the former include singles configuration interaction (CI), multireference CI, and averaged coupled pair functional theory. Examples of the latter include Moller-Plesset perturbation theory (through fifth order, with estimates to infinite order), coupled cluster methods, and quadratic CI (with approximate inclusion of triple and quadruple excitations). The performance of the various methods in reproducing the difficult-to-describe N-14 and O-17 isotropic hyperfine interactions is judged in light of both experimental data, where available, and estimated full CI values. The full CI limit was approached through a systematic sequence of ever-more-extensive, selected multireference CI wave functions that would, in principle, include the full CI as its final element. While the isotropic coupling constants were found to converge very slowly along this sequence, at least in comparison to other one-electron properties, the selected CI approach was efficient enough in its recovery of correlation effects to be used with large basis sets. The biggest calculation in the sequence of CI wave functions included over two million configurations. Energies and properties exhibited sufficient regularity to allow fitting with simple functional forms. The error arising from the lack of basis set completeness is estimated by comparison to fully numerical, partial-wave self-consistent field (SCF) and singles CI results. Effects due to vibrational motion are accounted for by numerical integration of the one-dimensional Schrodinger equation. C1 UNIV UTAH, UTAH SUPERCOMP INST, SALT LAKE CITY, UT 84112 USA. PACIFIC NW LAB, ATOM & MOLEC SPECTROSCOPY GRP, RICHLAND, WA 99352 USA. UTAH STATE UNIV, DEPT CHEM & BIOCHEM, LOGAN, UT 84322 USA. RP FELLER, D (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 54 TC 61 Z9 61 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 AUG 15 PY 1993 VL 99 IS 4 BP 2829 EP 2840 DI 10.1063/1.465192 PG 12 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600056 ER PT J AU UMRIGAR, CJ NIGHTINGALE, MP RUNGE, KJ AF UMRIGAR, CJ NIGHTINGALE, MP RUNGE, KJ TI A DIFFUSION MONTE-CARLO ALGORITHM WITH VERY SMALL TIME-STEP ERRORS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID RANDOM-WALK; QUANTUM-CHEMISTRY; SCHRODINGER-EQUATION; ELECTRON SYSTEMS; GREEN-FUNCTION; SIMULATION; MOLECULES; TRANSITION; ENERGY AB We propose modifications to the simple diffusion Monte Carlo algorithm that greatly reduce the time-step error. The improved algorithm has a time-step error smaller by a factor of 70 to 300 in the energy of Be, Li2 and Ne. For other observables the improvement is yet larger. The effective time step possible with the improved algorithm is typically a factor of a few hundred larger than the time step used in domain Green function Monte Carlo. We also present an optimized 109 parameter trial wave function for Be which, used in combination with our algorithm, yields an exceedingly accurate ground state energy. A simple solution to the population control bias in diffusion Monte Carlo is also discussed. C1 CORNELL UNIV,ATOM & SOLID STATE PHYS LAB,ITHACA,NY 14853. UNIV RHODE ISL,DEPT PHYS,KINGSTON,RI 02881. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP UMRIGAR, CJ (reprint author), CORNELL UNIV,CORNELL THEORY CTR,ITHACA,NY 14853, USA. NR 52 TC 342 Z9 343 U1 1 U2 19 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 AUG 15 PY 1993 VL 99 IS 4 BP 2865 EP 2890 DI 10.1063/1.465195 PG 26 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600059 ER PT J AU DANG, LX GARRETT, BC AF DANG, LX GARRETT, BC TI PHOTOELECTRON-SPECTRA OF THE HYDRATED IODINE ANION FROM MOLECULAR-DYNAMICS SIMULATIONS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POLARIZABLE WATER; ION SOLVATION; NEGATIVE-IONS; GAS-PHASE; CLUSTERS; POTENTIALS AB In this paper, we present the first calculations, based on molecular dynamics techniques, of vertical electron binding energies for the ionic clusters I- (H2O)n, (n=1-15). In these studies, we employ the polarizable water model developed recently by Dang [J. Chem. Phys. 97, 2659 (1992)]. We construct the ion-water potential so that the successive binding energies for the ionic clusters, the hydration enthalpy, and the structural properties of the aqueous ionic solution agree with the results obtained from experiments. The simulated vertical electron binding energies compare well with recent data from photoelectron spectroscopy experiments by Markovich, Giniger, Levin, and Cheshnovsky [J. Chem. Phys. 95, 9416 (1991)]. Interestingly, we obtain coordination numbers of 4 to 5 for the ionic clusters, I- (H2O)n, for n greater-than-or-equal-to 6. This result is smaller than the coordination number, based on the energetic properties predicted by Markovich et al Possible reasons for this discrepancy are discussed in the paper. Furthermore, our simulations place the iodine anion on the surface of the water clusters. This study demonstrates the usefulness of the molecular dynamics technique and provides a detailed picture of the ion solvation in clusters. RP DANG, LX (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RI Garrett, Bruce/F-8516-2011 NR 23 TC 195 Z9 196 U1 2 U2 15 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 AUG 15 PY 1993 VL 99 IS 4 BP 2972 EP 2977 DI 10.1063/1.465203 PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600067 ER PT J AU KANG, HS REE, FH AF KANG, HS REE, FH TI A VARIATIONAL THEORY OF CLASSICAL SOLIDS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID LENNARD-JONES SYSTEM; PERTURBATION-THEORY; PHASE-TRANSITION; SPHERE EQUATION; FLUID; STATE AB We present a variational theory of classical solids based on an inverse 12th-power repulsive reference system. The reference system is in turn represented by a hard-sphere system and an analytic term which is similar to the term accounting for the softness of the inverse 12th-power repulsion in Ross's variational theory of fluids. Thermodynamic properties of the Lennard-Jones, exponential-six, and inverse nth-power repulsive (n=4, 6, and 9) systems are calculated for a face-centered cubic phase. At densities slightly above the melting lines to densities where atomic vibrations are nearly harmonic, calculated results are in close agreement with Monte Carlo data performed in this and previous work. For a hexagonal close-packed phase, lattice dynamics calculations are carried out to show that the present variational theory gives reliable results, just as it does for the fcc phase. Comparisons with results from our recent solid-state perturbation theory are also discussed. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. RP JEONJU UNIV, COLL SCI & TECHNOL, DEPT CHEM, CHONJU, SOUTH KOREA. NR 24 TC 6 Z9 6 U1 1 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 AUG 15 PY 1993 VL 99 IS 4 BP 2985 EP 2991 DI 10.1063/1.465205 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LR056 UT WOS:A1993LR05600069 ER PT J AU RAWERS, J SAUER, W GERMAN, R AF RAWERS, J SAUER, W GERMAN, R TI PLANAR SOLIDIFICATION OF RAPIDLY SOLIDIFIED POWDERS SO JOURNAL OF MATERIALS SCIENCE LETTERS LA English DT Article RP RAWERS, J (reprint author), US BUR MINES,ALBANY RES CTR,ALBANY,OR, USA. NR 9 TC 6 Z9 6 U1 0 U2 0 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0261-8028 J9 J MATER SCI LETT JI J. Mater. Sci. Lett. PD AUG 15 PY 1993 VL 12 IS 16 BP 1327 EP 1329 DI 10.1007/BF00506352 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA LU545 UT WOS:A1993LU54500033 ER PT J AU LLANES, L ROLLETT, AD LAIRD, C AF LLANES, L ROLLETT, AD LAIRD, C TI EFFECT OF RAMP-TREATMENT ON THE CYCLIC STRESS-STRAIN CURVE OF SMALL GRAINED COPPER SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article ID POLYCRYSTALLINE COPPER; SINGLE-CRYSTALS; AMPLITUDE; FATIGUE; BEHAVIOR; DEPENDENCE AB Various cyclic mechanical tests have been used in order to elucidate the effects of ramp-loading, as mechanical pretreatment, on the cyclic response of ''small-grained'' copper. The grain size of this copper is not small in an absolute sense, but small in relation to that of other copper samples we have studied. This ''small'' grain size is associated with a particular texture which is significant here. Two parameters definitive of ramp-loading-peak stress and number of cycles during the ramp-have been used as the main experimental variables. The results have then been analyzed in relation to transmission electron microscopy (TEM) reports of the structures published elsewhere. In studying the cyclic stress-strain curve (CSSC) of ramp-treated small-grained copper it is found that the well-defined matrix structure inherited from the efficient cyclic hardening characteristic of ramp-treatment promotes higher stress and lower cyclic hardening values in the CSSC of ramp-loaded specimens, at low strain amplitudes, than those obtained in the CSSC of conventionally tested samples. At intermediate strain amplitudes, pronounced strain localization is promoted in ramp-treated copper for a very uniform and homogeneous evolution, from grain to grain, of the developed matrix into primary slip dislocation structure, i.e. persistent slip band (PSB) and wall structure. However, plateau-like behavior was not observed. The observation of early PSB nucleation in some grains, in association with a weak but noticeable [111]-[100] hard texture in the ramp-treated specimens, showed that the variations in PSB nucleation stress from grain to grain were not totally suppressed, and therefore plateau-like behavior in the CSSC was inhibited. Comparison of the results presented here with those of Z. Wang and C. Laird, Mater. Sci. Eng., 100 (1988) 57, who did report a plateau, suggests that the observation of a plateau in the CSSC of polycrystals may be very sensitive to small differences in material structure and experimental procedure. C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP LLANES, L (reprint author), UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104, USA. RI Rollett, Anthony/A-4096-2012; Llanes, Luis/H-9761-2015 OI Rollett, Anthony/0000-0003-4445-2191; Llanes, Luis/0000-0003-1054-1073 NR 28 TC 8 Z9 8 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0921-5093 J9 MAT SCI ENG A-STRUCT JI Mater. Sci. Eng. A-Struct. Mater. Prop. Microstruct. Process. PD AUG 15 PY 1993 VL 167 IS 1-2 BP 37 EP 45 DI 10.1016/0921-5093(93)90334-B PG 9 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA LU052 UT WOS:A1993LU05200005 ER PT J AU ANDERSON, S AUFFRAY, E AZIZ, T BACCARO, S BANERJEE, S BAREYRE, P BARONE, LE BORGIA, B BOUTET, D BURQ, JP CHEMARIN, M CHIPAUX, R DAFINEI, I DATANASIO, P DENOTARISTEFANI, F DEZILLIE, B DUJARDIN, C DUTTA, S FAURE, JL FAY, J FERRERE, D FRANCESCANGELI, O FUCHS, BA GANGULI, SN GILLESPIE, G GOYOT, M GUPTA, SK GURTU, A HECK, J HERVE, A HILLEMANNS, H HOLDENER, F ILLE, B JONSSON, L KIERSTEAD, J KRENZ, W KWAY, W LEGOFF, JM LEBEAU, M LEBRUN, P LECOQ, P LEMOIGNE, Y LOOMIS, G LUBELSMEYER, K MADJAR, N MAJNI, G ELMAMOUNI, H MANGLA, S MARES, JA MARTIN, JP MATTIOLI, M MAUGER, GJ MAZUMDAR, K MENGUCCI, P MERLO, JP MOINE, B NIKL, N PANSART, JP PEDRINI, C POINSIGNON, J POLAK, K RAGHAVAN, R REBOURGEARD, P RINALDI, D ROSA, J ROSOWSKY, A SAHUC, P SAMSONOV, V SARKAR, S SCHEGELSKI, V SCHMITZ, D SCHNEEGANS, M SELIVERSTOV, D STOLL, S SUDHAKAR, K SVENSSON, A TONWAR, SC TOPA, V VIALLE, JP VIVARGENT, M WALLRAFF, W WEBER, MJ WINTER, N WOODY, C WUEST, CR YANOVSKI, V AF ANDERSON, S AUFFRAY, E AZIZ, T BACCARO, S BANERJEE, S BAREYRE, P BARONE, LE BORGIA, B BOUTET, D BURQ, JP CHEMARIN, M CHIPAUX, R DAFINEI, I DATANASIO, P DENOTARISTEFANI, F DEZILLIE, B DUJARDIN, C DUTTA, S FAURE, JL FAY, J FERRERE, D FRANCESCANGELI, O FUCHS, BA GANGULI, SN GILLESPIE, G GOYOT, M GUPTA, SK GURTU, A HECK, J HERVE, A HILLEMANNS, H HOLDENER, F ILLE, B JONSSON, L KIERSTEAD, J KRENZ, W KWAY, W LEGOFF, JM LEBEAU, M LEBRUN, P LECOQ, P LEMOIGNE, Y LOOMIS, G LUBELSMEYER, K MADJAR, N MAJNI, G ELMAMOUNI, H MANGLA, S MARES, JA MARTIN, JP MATTIOLI, M MAUGER, GJ MAZUMDAR, K MENGUCCI, P MERLO, JP MOINE, B NIKL, N PANSART, JP PEDRINI, C POINSIGNON, J POLAK, K RAGHAVAN, R REBOURGEARD, P RINALDI, D ROSA, J ROSOWSKY, A SAHUC, P SAMSONOV, V SARKAR, S SCHEGELSKI, V SCHMITZ, D SCHNEEGANS, M SELIVERSTOV, D STOLL, S SUDHAKAR, K SVENSSON, A TONWAR, SC TOPA, V VIALLE, JP VIVARGENT, M WALLRAFF, W WEBER, MJ WINTER, N WOODY, C WUEST, CR YANOVSKI, V TI FURTHER RESULTS ON CERIUM FLUORIDE-CRYSTALS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID SCINTILLATOR AB A systematic investigation of the properties of cerium fluoride monocrystals has been performed by the ''Crystal Clear'' collaboration in view of a possible use of such crystals for the construction of high precision electromagnetic calorimeters for the future generation of high luminosity accelerators. A large sample of different crystals grown by several producers has been studied. The spectroscopic characteristics, the transmission, luminescence aid excitation spectra and the decay time curves are analysed. The light yield of the different crystals is measured with photomultipliers and Si photodiodes and compared to reference standards like BGO and NaI(Tl). The radiation damage behaviour is then presented for gamma and neutron irradiations, at different doses and dose rates, including thermal and optical bleaching. C1 CERN, CH-1211 GENEVA 23, SWITZERLAND. UNIV ANCONA, I-60100 ANCONA, ITALY. DAPNIA, SACLAY, FRANCE. INFN ROME, ANCONA, ITALY. INFN BOLOGNA, ANCONA, ITALY. INFN ROME, ENEA CASACCIA, ROME, ITALY. IFA, INST ATOM PHYS, BUCHAREST, ROMANIA. INST PHYS, PRAGUE, CZECHOSLOVAKIA. IPN, IN2P3, CNRS, LYON, FRANCE. ST PETERSBURG NUCL PHYS INST, ST PETERSBURG, RUSSIA. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. UNIV LYON 1, F-69365 LYON 2, FRANCE. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA. RHEIN WESTFAL TH AACHEN, INST PHYS, W-5100 AACHEN, GERMANY. UNIV LYON 1, F-69621 VILLEURBANNE, FRANCE. CNRS, LPCML, F-69373 LYON, FRANCE. TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA. CNRS, IN2P3, LAPP, ANNECY LE VIEUX, FRANCE. RP ANDERSON, S (reprint author), LUND UNIV, S-22101 LUND, SWEDEN. RI Chipaux, Remi/G-1145-2010; Dujardin, Christophe/A-7467-2013; Moine, Bernard/E-2297-2014; Merlo, Juan/E-2136-2011; Francescangeli, Oriano/M-4513-2016; MENGUCCI, PAOLO/M-7228-2016; OI Dujardin, Christophe/0000-0002-0205-9837; Merlo, Juan/0000-0001-8379-9708; Francescangeli, Oriano/0000-0002-5930-3984; MENGUCCI, PAOLO/0000-0001-9049-8524; Majni, GIUSEPPE/0000-0002-8965-5016; RINALDI, Daniele/0000-0003-1676-9044 NR 12 TC 37 Z9 38 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 15 PY 1993 VL 332 IS 3 BP 373 EP 394 DI 10.1016/0168-9002(93)90296-T PG 22 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LP281 UT WOS:A1993LP28100005 ER PT J AU BRABSON, BB CRITTENDEN, RR DZIERBA, AR FOXFORD, T GUNTER, J LINDENBUSCH, R SMITH, PT SCOTT, E SULANKE, T TEIGE, S ZILIAK, Z CHUNG, SU OLCHANSKI, C WEYGAND, DP WILLUTZKI, HJ SOLDATOV, A DUSHKIN, A SHEIN, I KOCHETKOV, V DENISOV, S DAVIS, CL BARYAM, Z DOWD, JP KERN, W BELZER, LI BODYAGIN, VA DEMIANOV, AI GRIBUSHIN, AM KOROTKICH, VL KRUGLOV, NA OSTROVIDOV, AI PROSKURYAKOV, AS SARYCHEVA, LI SINEV, NB ADAMS, T BISHOP, JM CADY, RD CASON, NM LOSECCO, JM MANAK, JJ SHEPHARD, WD STIENIKE, DL TAEGAR, SA THOMPSON, DR AF BRABSON, BB CRITTENDEN, RR DZIERBA, AR FOXFORD, T GUNTER, J LINDENBUSCH, R SMITH, PT SCOTT, E SULANKE, T TEIGE, S ZILIAK, Z CHUNG, SU OLCHANSKI, C WEYGAND, DP WILLUTZKI, HJ SOLDATOV, A DUSHKIN, A SHEIN, I KOCHETKOV, V DENISOV, S DAVIS, CL BARYAM, Z DOWD, JP KERN, W BELZER, LI BODYAGIN, VA DEMIANOV, AI GRIBUSHIN, AM KOROTKICH, VL KRUGLOV, NA OSTROVIDOV, AI PROSKURYAKOV, AS SARYCHEVA, LI SINEV, NB ADAMS, T BISHOP, JM CADY, RD CASON, NM LOSECCO, JM MANAK, JJ SHEPHARD, WD STIENIKE, DL TAEGAR, SA THOMPSON, DR TI A STUDY OF 2 PROTOTYPE LEAD GLASS ELECTROMAGNETIC CALORIMETERS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID HODOSCOPE CHERENKOV SPECTROMETER; IDENTIFICATION AB Two prototype lead glass calorimeters have been constructed and tested at the AGS at Brookhaven National Lab. The first is a 25-element prototype (P1) which was tested in the A2 beam line using electrons and pions ranging in energy from 0.5 to 5.0 GeV. Results were obtained on energy resolution, the effect on energy resolution of pre-radiators and non-normal incidence, and on e/pi separation. The second prototype (P2) has 319 elements and was tested in the A3 beam line using 3.0 and 5.0 GeV electrons and 15.0 GeV negative pions. Results were obtained on position resolution and effective mass resolution. Data were collected requiring multi-photon signatures in the calorimeter. The design, construction, monitoring, readout electronics (including a custom-built fast-encoding ADC system) and testing of the prototypes are described. These calorimeters are prototypes for a 3053-element lead glass calorimeter being built for Brookhaven Experiment 852: a search for mesons with unusual quantum numbers. Quality control procedures are also discussed. C1 BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. PROTVINO HIGH ENERGY PHYS INST, PROTVINO, RUSSIA. UNIV LOUISVILLE, DEPT PHYS, LOUISVILLE, KY 40292 USA. UNIV MASSACHUSETTS DARTMOUTH, N DARTMOUTH, MA 02747 USA. MOSCOW MV LOMONOSOV STATE UNIV, INST NUCL PHYS, MOSCOW, RUSSIA. UNIV NOTRE DAME, NOTRE DAME, IN 46556 USA. RP INDIANA UNIV, DEPT PHYS, BLOOMINGTON, IN 47405 USA. RI Demianov, Andrei/E-4565-2012; Gribushin, Andrei/J-4225-2012 NR 12 TC 21 Z9 21 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 EI 1872-9576 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD AUG 15 PY 1993 VL 332 IS 3 BP 419 EP 443 DI 10.1016/0168-9002(93)90299-W PG 25 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LP281 UT WOS:A1993LP28100008 ER PT J AU BEACH, R REICHERT, P BENETT, W FREITAS, B MITCHELL, S VELSKO, A DAVIN, J SOLARZ, R AF BEACH, R REICHERT, P BENETT, W FREITAS, B MITCHELL, S VELSKO, A DAVIN, J SOLARZ, R TI SCALABLE DIODE-END-PUMPING TECHNOLOGY APPLIED TO A 100-MJ Q-SWITCHED ND(3+)-YLF LASER-OSCILLATOR SO OPTICS LETTERS LA English DT Article ID SOLID-STATE LASERS; ONE JOULE AB A compact diode-end-pumped Nd3+:YLF laser oscillator capable of delivering 100 mJ of energy in a 4-ns pulse is demonstrated. A scalable pump architecture is used in which the output from a cylindrical-microlens conditioned-diode array is delivered to the laser rod via a lens duct. As a pump technology, this architecture may permit new applications for diode lasers that were previously not possible. RP BEACH, R (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 5508,L-495,LIVERMORE,CA 94550, USA. NR 10 TC 29 Z9 31 U1 3 U2 6 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD AUG 15 PY 1993 VL 18 IS 16 BP 1326 EP 1328 DI 10.1364/OL.18.001326 PG 3 WC Optics SC Optics GA LQ850 UT WOS:A1993LQ85000014 PM 19823371 ER PT J AU BENICEWICZ, PK TAYLOR, AJ AF BENICEWICZ, PK TAYLOR, AJ TI SCALING OF TERAHERTZ RADIATION FROM LARGE-APERTURE BIASED INP PHOTOCONDUCTORS SO OPTICS LETTERS LA English DT Article ID ANTENNAS AB We present, for biased InP emitters, the dependence of the generated terahertz radiation on bias field and optical fluence for optical fluences of 0.01-1.0 mJ/cm2 and bias fields as high as 12 kV/cm. The radiated electric field scales linearly with the bias field up to 12 kV/cm and exhibits monotonic saturation behavior, radiating half the maximum field at an excitation fluence of 0.058 mJ/cm2. RP BENICEWICZ, PK (reprint author), LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,MS E543,LOS ALAMOS,NM 87545, USA. NR 10 TC 38 Z9 38 U1 0 U2 5 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD AUG 15 PY 1993 VL 18 IS 16 BP 1332 EP 1334 DI 10.1364/OL.18.001332 PG 3 WC Optics SC Optics GA LQ850 UT WOS:A1993LQ85000016 PM 19823373 ER PT J AU TAYLOR, AJ BENICEWICZ, PK YOUNG, SM AF TAYLOR, AJ BENICEWICZ, PK YOUNG, SM TI MODELING OF FEMTOSECOND ELECTROMAGNETIC PULSES FROM LARGE-APERTURE PHOTOCONDUCTORS SO OPTICS LETTERS LA English DT Article ID ANTENNAS AB A model of the electromagnetic radiation generated by the triggering of large-aperture biased photoconductors with ultrashort pulses is developed. In the far field, the radiated fluence and intensity, as well as waveforms of the radiated electric field, are presented as a function of optical excitation fluence. RP TAYLOR, AJ (reprint author), LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,MS E543,LOS ALAMOS,NM 87545, USA. NR 8 TC 42 Z9 44 U1 0 U2 4 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD AUG 15 PY 1993 VL 18 IS 16 BP 1340 EP 1342 DI 10.1364/OL.18.001340 PG 3 WC Optics SC Optics GA LQ850 UT WOS:A1993LQ85000019 PM 19823376 ER PT J AU WHITE, WE PATTERSON, FG COMBS, RL PRICE, DF SHEPHERD, RL AF WHITE, WE PATTERSON, FG COMBS, RL PRICE, DF SHEPHERD, RL TI COMPENSATION OF HIGHER-ORDER FREQUENCY-DEPENDENT PHASE TERMS IN CHIRPED-PULSE AMPLIFICATION SYSTEMS SO OPTICS LETTERS LA English DT Article ID OPTICAL PULSES; LASER AB We have developed a system that provides monotonic tuning of the higher-order frequency-dependent phase of ultrashort laser pulses. This technique utilizes geometric aberrations that arise from adjustments to the relative alignment of the elements of an air-spaced doublet lens. In a system such as a diffraction-grating stretcher, the spectral components of the optical pulses are spatially dispersed, and lens aberrations introduce frequency-dependent phase shifts. A numerical model of a general chirped-pulsed amplification system has been developed and verified by comparison with experimental and analytical results. Numerical results indicating that higher-order phase terms can be compensated by a properly adjusted air-spaced doublet design within the pulse stretcher are presented. RP WHITE, WE (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-251,LIVERMORE,CA 94550, USA. NR 12 TC 70 Z9 70 U1 2 U2 4 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD AUG 15 PY 1993 VL 18 IS 16 BP 1343 EP 1345 DI 10.1364/OL.18.001343 PG 3 WC Optics SC Optics GA LQ850 UT WOS:A1993LQ85000020 PM 19823377 ER PT J AU PARANTHAMAN, M THOMPSON, JR SUN, YR BRYNESTAD, J AF PARANTHAMAN, M THOMPSON, JR SUN, YR BRYNESTAD, J TI SYNTHESIS AND MAGNETIC CHARACTERIZATION OF THE HIGH-T(C) SUPERCONDUCTING COMPOUND HGBA2CUO4+DELTA SO PHYSICA C LA English DT Article ID COLUMNAR DEFECTS; CURRENT-DENSITY; CRYSTALS; IRRADIATION AB Bulk superconducting samples of HgBa2CuO4+delta (hereafter denoted as Hg-1201) were prepared by solid state reaction of stoichiometric quantities of HgO and Ba2CuO3 precursors. The ''as-synthesized'' Hg-1201 samples had a T(c) of 95 K, as defined by the onset of diamagnetism. The crystal symmetry was found to be tetragonal with lattice parameters, a = 3.876(2) angstrom, and c = 9.515 (3) angstrom, similar to the literature values. Finely ground X-ray specimens were stable upon exposure to ambient air for a period of approximately 24 h. Magnetic characterizations were conducted using a SQUID based DC magnetometer. Studies of the transition region in low applied fields showed complete screening and evidence for weak intergrain coupling of the randomly oriented crystallites. High field magnetic hysteresis studies showed rapid decay of hysteresis of the magnetization (proportional to the current density), both with applied field and temperature, These findings are attributed to the presence of substantial thermally activated flux motion. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. RP PARANTHAMAN, M (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. RI Paranthaman, Mariappan/N-3866-2015 OI Paranthaman, Mariappan/0000-0003-3009-8531 NR 14 TC 49 Z9 49 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD AUG 15 PY 1993 VL 213 IS 3-4 BP 271 EP 275 DI 10.1016/0921-4534(93)90442-S PG 5 WC Physics, Applied SC Physics GA LU645 UT WOS:A1993LU64500003 ER PT J AU KWEI, GH WILLIS, JO SAKURAI, T GOLDSTONE, JA LAWSON, AC YAMAUCHI, H TANAKA, S AF KWEI, GH WILLIS, JO SAKURAI, T GOLDSTONE, JA LAWSON, AC YAMAUCHI, H TANAKA, S TI DOPANT SOLUBILITY, PHASE-STABILITY AND SUPERCONDUCTIVITY IN SR-DOPED LA2-XSRXCACU2O6 SO PHYSICA C LA English DT Article ID NEUTRON POWDER DIFFRACTION; HIGH-TC SUPERCONDUCTIVITY; BOND-VALENCE SUMS; CRYSTAL-STRUCTURE; HOLE CONCENTRATION; COPPER OXIDES; OXYGEN; CUPRATE; OXIDATION; SYSTEM AB We report the synthesis and characterization of the Sr-doped cuprate superconductor La2-xSrxCaCu2O6 (326) for doping levels ranging from x=0 to 0.35. Powder neutron diffraction studies of these sample show that single-phase Sr-doped 326 is obtained only within the narrow range: 0.05 < x < 0.2 with the synthetic conditions used. At low values of x, La2-ySryCuO4 (214) is produced and the 326 material is Ca rich. At higher values of x, it becomes progressively more difficult to produce the 326 phase and both La8-zSrzCu8O20 (z almost-equal-to 1.9) and CaO appear as extra phases. Although it is not possible to refine the La/Sr ratio in samples with x=0.30 and 0.35, structural changes with doping suggest that additional Sr continues to be incorporated. The observed changes in superconducting behavior with doping are discussed in terms of structural changes, the role of the interstitial oxygens, and changes in the hole concentration. C1 INT SUPERCONDUCT TECHNOL CTR,SUPERCONDUCT RES LAB,KOTO KU,TOKYO 135,JAPAN. RP KWEI, GH (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 35 TC 13 Z9 13 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD AUG 15 PY 1993 VL 213 IS 3-4 BP 455 EP 470 DI 10.1016/0921-4534(93)90466-4 PG 16 WC Physics, Applied SC Physics GA LU645 UT WOS:A1993LU64500027 ER PT J AU HOCHERMAN, T ROSENAU, P AF HOCHERMAN, T ROSENAU, P TI ON KS-TYPE EQUATIONS DESCRIBING THE EVOLUTION AND RUPTURE OF A LIQUID INTERFACE SO PHYSICA D LA English DT Article ID KURAMOTO-SIVASHINSKY EQUATION; DILUTE-BINARY-ALLOY; ANNULAR FILM; SOLIDIFICATION; INSTABILITY; BREAKING AB Study of core annular flow of two liquids of different viscosity generates two new amplitude equations of the Kuramoto-Sivashinsky (KS) type. In the first an integral operator of dispersive nature appends the KS. It modifies the bifurcation structure of the KS and delays parametrically the appearances of a specific pattern. The second modification, specific to cylindrical geometry, is due to a sensitive part in the curvature dispensed within a conventional expansion. When retained, it may cause a linearly unstable interface to rupture and to form, experimentally observed, bubbles. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP HOCHERMAN, T (reprint author), TECHNION ISRAEL INST TECHNOL,DEPT MECH ENGN,IL-32000 HAIFA,ISRAEL. NR 17 TC 21 Z9 21 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD AUG 15 PY 1993 VL 67 IS 1-3 BP 113 EP 125 DI 10.1016/0167-2789(93)90200-K PG 13 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA LT724 UT WOS:A1993LT72400006 ER PT J AU XU, JH LIN, W FREEMAN, AJ AF XU, JH LIN, W FREEMAN, AJ TI ELECTRONIC-STRUCTURE AND PHASE-STABILITY OF A3TI (A = FE, CO, NI, AND CU) SO PHYSICAL REVIEW B LA English DT Article ID COHESIVE PROPERTIES; BAND-STRUCTURE; ALLOYS; (FE,CO,NI)3V; CARBIDES; NITRIDES; CO3TI AB The electronic structure and cohesive properties (including equilibrium lattice constant, bulk modulus, and formation energy) of the intermetallic compounds A3Ti (A = Fe, Co, Ni, and Cu) in their L1(2), D0(24), and D0(22) structures have been studied by means of the self-consistent total-energy linear-muffin-tin-orbital method based on the local-density approximation. The correct phase preference (or stability) of these compounds is obtained. The correlation between the electronic concentration c(e) (defined as the number of electrons per atom) and the crystal structure found by Beck, Sinha, and Liu can be interpreted in terms of the filling of bonding states in a specific structure showing that the structural stability of A3 Ti is predominantly governed by its electron packing in reciprocal space. C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP XU, JH (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. NR 38 TC 27 Z9 27 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 7 BP 4276 EP 4286 DI 10.1103/PhysRevB.48.4276 PG 11 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600005 ER PT J AU FOILES, SM AF FOILES, SM TI INTERATOMIC INTERACTIONS FOR MO AND W BASED ON THE LOW-ORDER MOMENTS OF THE DENSITY-OF-STATES SO PHYSICAL REVIEW B LA English DT Article ID EMBEDDED-ATOM-METHOD; NORM-CONSERVING PSEUDOPOTENTIALS; CUBIC TRANSITION-METALS; SELF-DIFFUSION; W(001) SURFACE; POTENTIALS; ENERGY; MODEL; RECONSTRUCTION; MOLYBDENUM AB A model of the energetics of bec transition metals based on the low-order moments of the electronic density of states is presented. The effects of the changes of the coarse shape of the density of states are included via a fourth moment term in a manner similar to other recently proposed models. The model is tested by the computation of point defect properties, phonon dispersions, structural energy differences, and surface properties. The results are compared to experiment, ab initio calculations, and other model interatomic potentials. The results indicate that the inclusion of the fourth moment term in the energy does not significantly improve the description of properties with structures close to that of the bulk bcc lattice. However, the fourth moment term substantially improves the description of large deviations from the bulk bcc lattice such as surfaces and alternative crystal structures. RP FOILES, SM (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94551, USA. OI Foiles, Stephen/0000-0002-1907-454X NR 65 TC 71 Z9 72 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 7 BP 4287 EP 4298 DI 10.1103/PhysRevB.48.4287 PG 12 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600006 ER PT J AU KARPOV, VG AF KARPOV, VG TI RESONANT ELECTRONIC STATES IN DISORDERED-SYSTEMS SO PHYSICAL REVIEW B LA English DT Article AB Long-lived quasilocalized (resonant) electronic states are predicted to lie above the mobility edge of a disordered system. A modification of the optimum fluctuation method is developed to estimate the density of such states. It is shown that the density of states tails exponentially with energy above the mobility edge and that this tail is almost symmetric to the tail of localized states with respect to the mobility edge. Possible manifestations of the predicted states are discussed. RP KARPOV, VG (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Karpov, Victor/I-5169-2012; OI Karpov, Victor/0000-0003-2558-8368 NR 8 TC 14 Z9 14 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 7 BP 4325 EP 4328 DI 10.1103/PhysRevB.48.4325 PG 4 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600010 ER PT J AU ALLEN, PB WENTZCOVITCH, RM SCHULZ, WW CANFIELD, PC AF ALLEN, PB WENTZCOVITCH, RM SCHULZ, WW CANFIELD, PC TI RESISTIVITY OF THE HIGH-TEMPERATURE METALLIC PHASE OF VO2 SO PHYSICAL REVIEW B LA English DT Article ID ELECTRICAL-RESISTIVITY; MAGNETIC-SUSCEPTIBILITY; INSULATOR-TRANSITION; ELECTRONIC-STRUCTURE; FERMI-SURFACE; STATE; TRANSPORT; BEHAVIOR; ENERGY; UPT3 AB Measurements are reported of the electrical resistivity rho(T) along the c axis of a single crystal Of VO2, from the metal-insulator transition at T = 333 K up to 840 K. The temperature dependence is very linear, and a fit to Bloch-Gruneisen theory gives a residual resistivity rho0 = 65 muOMEGA cm and a ratio rho(840 K)/rho0 = 8. With the help of a local-density-approximation band-structure calculation, we further pursue the conventional (Bloch-Boltzmann) interpretation by extracting the electron-phonon coupling constant lambda = 1.1 and the mean free path l(800 K) = 3.3 angstrom. The short mean free path implies that the conventional interpretation is internally inconsistent. The most likely explanation is that unknown internal damage (e.g., cracks) has altered the effective cross section of the sample, causing the measured resistivity to be overestimated by a factor greater-than-or-equal-to 3. Another possibility is that, in common with the normal state of copper oxide superconductors, metallic VO2 may not be a conventional Fermi liquid. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP ALLEN, PB (reprint author), SUNY,DEPT PHYS,STONY BROOK,NY 11794, USA. RI Canfield, Paul/H-2698-2014; Wentzcovitch, Renata/J-8768-2015 NR 39 TC 69 Z9 69 U1 2 U2 25 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 AUG 15 PY 1993 VL 48 IS 7 BP 4359 EP 4363 DI 10.1103/PhysRevB.48.4359 PG 5 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600014 ER PT J AU WAMPLER, WR MYERS, SM FOLLSTAEDT, DM AF WAMPLER, WR MYERS, SM FOLLSTAEDT, DM TI SURFACE SILICON-DEUTERIUM BOND-ENERGY FROM GAS-PHASE EQUILIBRATION SO PHYSICAL REVIEW B LA English DT Article ID HYDROGEN DESORPTION-KINETICS; ATOMIC-HYDROGEN; ADSORPTION; SI(100); MONOHYDRIDE; SI(111)7X7 AB The bond. strength of deuterium (D) to the surface of silicon was determined to be 2.67 +/- 0.1 eV from measurements of the amount of D on the surface in equilibrium with D2 gas at various pressures. This was done by measuring the amount of D on surfaces of closed internal microcavities using nuclear reaction analysis. The binding of D to a silicon surface is significantly weaker than the Si-H bond in silane which has been assumed in the past to indicate the strength of the surface Si-H bond. The fact that the Si-D bond strength is comparable to the activation energy for thermal desorption of H from Si suggests a possible reaction path for desorption in which the first and rate-determining step is the dissociation of a Si-H bond followed by the exothermic reaction between the released H atom and a second Si-H to form a H-2 molecule and two Si- dangling bonds. Our result also gives a value of 1.8 eV for the activation energy for dissociative adsorption of D2 on silicon. The number of bond sites is comparable to the number of Si atoms on the cavity surfaces calculated from the total cavity surface area determined by TEM. RP WAMPLER, WR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 25 TC 24 Z9 24 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 7 BP 4492 EP 4497 DI 10.1103/PhysRevB.48.4492 PG 6 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600034 ER PT J AU ZHENG, Y MOLER, E HUDSON, E HUSSAIN, Z SHIRLEY, DA AF ZHENG, Y MOLER, E HUDSON, E HUSSAIN, Z SHIRLEY, DA TI STRUCTURAL DETERMINATION OF NH3 ADSORBED ON NI(100) USING ANGLE-RESOLVED PHOTOEMISSION EXTENDED FINE-STRUCTURE SPECTROSCOPY SO PHYSICAL REVIEW B LA English DT Article ID PHOTOELECTRON DIFFRACTION; NI(111); AMMONIA; CHEMISORPTION; SURFACE; SCATTERING; GEOMETRY; ATOM AB The structure of NH3 adsorbed on the Ni(100) surface was studied using the angle-resolved photoemission extended fine-structure (ARPEFS) technique. The ARPEFS data were taken along the surface normal-emission direction at a sample temperature of 100 K. Multiple-scattering spherical-wave data analysis determined that NH3 adsorbs at the atop site of the Ni(100) surface with a N-Ni bond length of 2.01 angstrom and a 2.8% expansion of the topmost Ni-Ni interlayer spacing. C1 PENN STATE UNIV,DEPT PHYS,UNIV PK,PA 16802. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV ACCELERATOR & FUS RES,BERKELEY,CA 94720. RP ZHENG, Y (reprint author), PENN STATE UNIV,DEPT CHEM,UNIV PK,PA 16802, USA. NR 24 TC 11 Z9 11 U1 1 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 AUG 15 PY 1993 VL 48 IS 7 BP 4760 EP 4766 DI 10.1103/PhysRevB.48.4760 PG 7 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600070 ER PT J AU MARTIN, RL RITCHIE, JP AF MARTIN, RL RITCHIE, JP TI COULOMB AND EXCHANGE INTERACTIONS IN C60(N-) SO PHYSICAL REVIEW B LA English DT Article ID CARBON CLUSTERS; IONIZATION-POTENTIALS; ELECTRONIC-STRUCTURE; VIBRATIONAL-MODES; MNDO METHOD; C-60; SUPERCONDUCTIVITY; C60; BUCKMINSTERFULLERENE; FULLERENES AB Semiempirical modified-neglect-of-differential-overlap (MNDO) quantum chemistry calculations are performed for the negative ions of an isolated C60. The value computed for the first electron affinity is in excellent agreement with experiment. MNDO predictions of the energies of the low-lying states of C60(2-) and C60(3-) allow us to extract an effective on-site repulsion U0 approximately 3 eV, and a direct exchange interaction k approximately 50 meV for C60. These values are used to estimate the effective on-site repulsion and dielectric constant of solid C60, with results in good agreement with experiment. A similar approach is used to determine ''partially'' screened parameters appropriate to a model of K3C60. We find that both the on-site (U0 approximately 1.3 eV) and near-neighbor (V approximately 0.3 eV) Coulomb terms are significant relative to the bandwidth (W approximately 0.6 eV). RP MARTIN, RL (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,MSB268,LOS ALAMOS,NM 87545, USA. NR 37 TC 74 Z9 74 U1 0 U2 9 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 AUG 15 PY 1993 VL 48 IS 7 BP 4845 EP 4849 DI 10.1103/PhysRevB.48.4845 PG 5 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600081 ER PT J AU MASCARENHAS, A ALONSO, RG HORNER, GS FROYEN, S HSIEH, KC CHENG, KY AF MASCARENHAS, A ALONSO, RG HORNER, GS FROYEN, S HSIEH, KC CHENG, KY TI SPONTANEOUSLY GENERATED EFFECTIVE-MASS LATERAL SUPERLATTICES SO PHYSICAL REVIEW B LA English DT Note ID SHORT-PERIOD SUPERLATTICES AB An alternative approach to synthesizing effective-mass lateral superlattices is proposed. We show theoretically that the coherency strain associated with spontaneous lateral composition modulation provides a negative feedback which results in a band-gap locking phenomenon but that the resulting longitudinal strain wave breaks the symmetry of the valence bands, thereby generating an effective-mass lateral superlattice. C1 UNIV ILLINOIS,DEPT ELECT & COMP ENGN,URBANA,IL 61801. RP MASCARENHAS, A (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 15 TC 19 Z9 19 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 7 BP 4907 EP 4909 DI 10.1103/PhysRevB.48.4907 PG 3 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600096 ER PT J AU HORNER, GS MASCARENHAS, A ALONSO, RG FRIEDMAN, DJ SINHA, K BERTNESS, KA ZHU, JG OLSON, JM AF HORNER, GS MASCARENHAS, A ALONSO, RG FRIEDMAN, DJ SINHA, K BERTNESS, KA ZHU, JG OLSON, JM TI POLARIZED PHOTOLUMINESCENCE MEASUREMENTS OF THE VALENCE-BAND SPLITTING IN SINGLE-VARIANT, SPONTANEOUSLY ORDERED GAINP(2) SO PHYSICAL REVIEW B LA English DT Note ID ALLOY SEMICONDUCTORS; GA0.5IN0.5P; GA0.52IN0.48P; PHASE AB In this paper, polarized photoluminescence is used to study the GAMMA-point valence-band structure of single-variant, spontaneously ordered GaInP2. A laser beam is focused onto the {110} cleaved edges of the epilayer, and the resultant photoluminescence is analyzed in the backscattering geometry. This ''edge-on'' arrangement allows us to access directly the polarization selection rules both parallel and perpendicular to the ordering axis, and it shows that the axis is [111BAR], in agreement with transmission-electron-diffraction measurements. This spectroscopic technique does not require the use of deconvolution methods to resolve the transition from the conduction band to the crystal-field valence band, and as such provides a direct measurement of the CuPt selection rules and valence-band splitting in GaInP2. RP HORNER, GS (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 22 TC 26 Z9 26 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 7 BP 4944 EP 4947 DI 10.1103/PhysRevB.48.4944 PG 4 WC Physics, Condensed Matter SC Physics GA LW026 UT WOS:A1993LW02600106 ER PT J AU DELONG, MC OHLSEN, WD VIOHL, I YIN, X TAYLOR, PC SENGUPTA, D STILLMAN, GE OLSON, JM HARRISON, WA AF DELONG, MC OHLSEN, WD VIOHL, I YIN, X TAYLOR, PC SENGUPTA, D STILLMAN, GE OLSON, JM HARRISON, WA TI NONTHERMAL MICROWAVE MODULATION OF PHOTOLUMINESCENCE IN III-V-SEMICONDUCTORS SO PHYSICAL REVIEW B LA English DT Article ID DETECTED CYCLOTRON-RESONANCE; IMPACT-IONIZATION; OPTICAL-DETECTION; EPITAXIAL GAAS; QUANTUM-WELLS; EXCITONS; RECOMBINATION; TRANSPORT; SILICON; DONORS AB The effects of microwave electric fields on the photoluminescence (PL) from binary III-V semiconductors are compared to those of fields applied directly via Ohmic contacts. Significant differences are seen between the electric-field dependences of luminescence intensity changes for microwave and directly applied fields, particularly in cases where the directly applied fields lead unequivocally to impact ionization. Hence, in contrast to previously published reports, it appears that mechanisms other than impact ionization are significant in the microwave-PL coupling. We have also performed Monte Carlo simulations. These calculations indicate that the energy dependence of the cross sections for capture of photoexcited carriers into competing radiative and nonradiative processes plays an important role. C1 UNIV ILLINOIS,CTR COMPOUND SEMICOND MICROELECTR,URBANA,IL 61801. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305. RP DELONG, MC (reprint author), UNIV UTAH,DEPT PHYS,SALT LAKE CITY,UT 84112, USA. NR 34 TC 9 Z9 9 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 AUG 15 PY 1993 VL 48 IS 8 BP 5157 EP 5166 DI 10.1103/PhysRevB.48.5157 PG 10 WC Physics, Condensed Matter SC Physics GA LV385 UT WOS:A1993LV38500020 ER PT J AU ASOKAKUMAR, P GOSSMANN, HJ UNTERWALD, FC FELDMAN, LC LEUNG, TC AU, HL TALYANSKI, V NIELSEN, B LYNN, KG AF ASOKAKUMAR, P GOSSMANN, HJ UNTERWALD, FC FELDMAN, LC LEUNG, TC AU, HL TALYANSKI, V NIELSEN, B LYNN, KG TI DISTRIBUTION OF POINT-DEFECTS IN SI(100)/SI GROWN BY LOW-TEMPERATURE MOLECULAR-BEAM EPITAXY AND SOLID-PHASE EPITAXY SO PHYSICAL REVIEW B LA English DT Article ID IRRADIATED SILICON; POSITRON BEAM; THIN-FILMS; SI; TRANSMISSION; SURFACES AB Positron annihilation in Si is a quantitative, depth-sensitive technique for the detection of vacancy--like defects or voids. A sensitivity of 5 x 10(15) cm-3 for voidlike defects is easily achieved. The technique has been applied to a study of point-defect distributions in thin films of Si grown by molecular-beam epitaxy. A special procedure was developed to remove the influence of the native oxide on the positron measurement. 200-nm-thick films grown at temperatures between 475 and 560-degrees-C show no defects below the sensitivity limit and are indistinguishable from the bulk substrate. So are films grown at 220-degrees-C, provided a 2-min high-temperature anneal to a peak temperature of greater-than-or-equal-to 500-degrees-C is executed every congruent-to 30 nm during growth. If T(RTA) = 450-degrees-C, part of the film contains va-cancylike defects to a concentration of congruent-to 10(18) cm-3. These results correlate well with current-voltage characteristics of p-n junctions grown with different rapid thermal anneal (RTA) temperatures. Ion scattering, with a defect sensitivity of almost-equal-to 1%, shows no difference between films grown with different T(RTA). Recrystallization of amorphous films, deposited at room temperature and annealed in situ at 550-degrees-C, always leaves a significant defect concentration of congruent-to 2 x 10(18) cm-3; those defects are reduced but still present even after a 2-h, 800-degrees-C furnace anneal. C1 AT&T BELL LABS,MURRAY HILL,NJ 07974. RP ASOKAKUMAR, P (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. RI Nielsen, Bent/B-7353-2009 OI Nielsen, Bent/0000-0001-7016-0040 NR 32 TC 24 Z9 24 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 8 BP 5345 EP 5353 DI 10.1103/PhysRevB.48.5345 PG 9 WC Physics, Condensed Matter SC Physics GA LV385 UT WOS:A1993LV38500045 ER PT J AU LIN, MF SHUNG, KWK AF LIN, MF SHUNG, KWK TI MAGNETOPLASMONS AND PERSISTENT CURRENTS IN CYLINDRICAL TUBULES SO PHYSICAL REVIEW B LA English DT Article ID DIMENSIONAL ELECTRON-SYSTEMS; INTERCALATION COMPOUNDS; GRAPHENE TUBULES; MAGNETIC-FIELD; QUANTUM WIRES; GRAPHITE; RINGS; MICROTUBULES; SPECTRA; CARBON AB The quasi-one-dimensional (1D) magnetoplasmons of a graphene tubule threaded by a magnetic field (B) have been evaluated exactly within the random-phase approximation. The plasmon frequency w(p) exhibits a very rich structure as a function of the magnetic flux through the tubule (phi)-including many cusps. The phi-dependent part of w(p) is shown to be proportional to the induced persistent-current density (J) in the tubule. Measurements on w(p) and J are expected to reveal insights regarding the band properties of the quasi-1D system. The structure near the cusps has been examined and is found to be related to important band parameters (e.g., the effective mass of the electrons). The results of this study may be easily generalized to systems composed of several coaxial tubules. The importance of the spin-B interaction in graphene tubules is indicated. C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP LIN, MF (reprint author), NATL TSING HUA UNIV,DEPT PHYS,HSINCHU 30043,TAIWAN. NR 24 TC 51 Z9 51 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 8 BP 5567 EP 5571 DI 10.1103/PhysRevB.48.5567 PG 5 WC Physics, Condensed Matter SC Physics GA LV385 UT WOS:A1993LV38500064 ER PT J AU KITAMURA, N SWARTZENTRUBER, BS LAGALLY, MG WEBB, MB AF KITAMURA, N SWARTZENTRUBER, BS LAGALLY, MG WEBB, MB TI VARIABLE-TEMPERATURE STM MEASUREMENTS OF STEP KINETICS ON SI(001) SO PHYSICAL REVIEW B LA English DT Note ID SCANNING-TUNNELING-MICROSCOPY; VICINAL SI(111); EQUILIBRIUM STRUCTURES; SURFACE-DIFFUSION; SI; GROWTH AB Using a variable-temperature scanning tunneling microscope we have measured the time evolution of the atomic-scale morphology of steps on Si(001) at temperatures up to 350-degrees-C. Step-rearrangement events, i.e., local changes in the atomic arrangements, are observed between successive images at temperatures above 225-degrees-C. The observed events always involve single or multiple units of four atoms and occur most frequently at kink sites and at the ends of dimer rows. By measuring the event rate we determine an effective activation-energy barrier of 1.4-1.7 eV. The events cannot be completely characterized as successive random arrangements involving only single units. Rather, correlations are observed between neighboring dimer columns, and the event rate depends on the local atomic-step configuration. C1 SANDIA NATL LABS, DIV 114, ALBUQUERQUE, NM 87185 USA. RP UNIV WISCONSIN, MADISON, WI 53706 USA. NR 25 TC 81 Z9 82 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 8 BP 5704 EP 5707 DI 10.1103/PhysRevB.48.5704 PG 4 WC Physics, Condensed Matter SC Physics GA LV385 UT WOS:A1993LV38500091 ER PT J AU WONG, GCL LORETTO, D ROTENBERG, E OLMSTEAD, MA LUCAS, CA AF WONG, GCL LORETTO, D ROTENBERG, E OLMSTEAD, MA LUCAS, CA TI CAF2-SI(111) AS A MODEL IONIC-COVALENT SYSTEM - TRANSITION FROM CHEMISORPTION TO EPITAXY SO PHYSICAL REVIEW B LA English DT Note ID INTERFACE; GROWTH; SURFACE; CAF2/SI(111); TEMPERATURE AB The demands of chemisorption and epitaxy are quite different for electronically dissimilar systems. The transition between these two regimes in CaF2-Si(111) is studied with transmission-electron microscopy and photoemission. Changes in the electronic structure of the evolving growth surface are expressed in the composite growth mode, a Stranski-Krastanow pathway to layer-by-layer growth, which begins with CaF2 coherent island formation on a Si-CaF layer. After this transition, layer-by-layer CaF2 homoepitaxy is possible even at room temperature, and the critical thickness can be extended. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV WASHINGTON,DEPT PHYS,SEATTLE,WA 98195. RP WONG, GCL (reprint author), LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Rotenberg, Eli/B-3700-2009; OI Rotenberg, Eli/0000-0002-3979-8844; Olmstead, Marjorie/0000-0003-4374-0976; Lucas, Christopher/0000-0001-5743-3868 NR 21 TC 21 Z9 21 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD AUG 15 PY 1993 VL 48 IS 8 BP 5716 EP 5719 DI 10.1103/PhysRevB.48.5716 PG 4 WC Physics, Condensed Matter SC Physics GA LV385 UT WOS:A1993LV38500094 ER PT J AU GLEISER, M KOLB, EW AF GLEISER, M KOLB, EW TI CRITICAL-BEHAVIOR IN THE ELECTROWEAK PHASE-TRANSITION SO PHYSICAL REVIEW D LA English DT Article ID BARYON-NUMBER VIOLATION; FINITE TEMPERATURE; STANDARD MODEL; SUBCRITICAL BUBBLES; EARLY UNIVERSE; BARYOGENESIS; GAUGE; FLUCTUATIONS; ASYMMETRY; SCALE AB We examine the behavior of the standard-model electroweak phase transition in the early Universe. We argue that close to the critical temperature it is possible to estimate the effective infrared corrections to the one-loop potential using well-known epsilon-expansion results from the theory of critical phenomena in three spatial dimensions. The theory with the epsilon-corrected potential exhibits much larger fluctuations in the spatial correlations of the order parameter, considerably weakening the strength of the transition. C1 FERMILAB NATL ACCELERATOR LAB, NASA FERMILAB ASTROPHYS CTR, BATAVIA, IL 60510 USA. UNIV CHICAGO, ENRICO FERMI INST, DEPT ASTRON & ASTROPHYS, CHICAGO, IL 60637 USA. RP DARTMOUTH COLL, DEPT PHYS & ASTRON, HANOVER, NH 03755 USA. NR 44 TC 38 Z9 38 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD AUG 15 PY 1993 VL 48 IS 4 BP 1560 EP 1570 DI 10.1103/PhysRevD.48.1560 PG 11 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LT880 UT WOS:A1993LT88000011 ER PT J AU SEVRIN, A VANNIEUWENHUIZEN, P AF SEVRIN, A VANNIEUWENHUIZEN, P TI QUANTUM GAUGING FROM CLASSICAL GAUGING OF NONLINEAR ALGEBRAS SO PHYSICAL REVIEW D LA English DT Article ID SUPERCONFORMAL ALGEBRAS; 2 DIMENSIONS; W3 GRAVITY AB We extend our previous theory of the gauging of classical quadratically nonlinear algebras without a central charge but with a coset structure to the quantum level. Inserting the minimal anomalies into the classical transformation rules of the currents introduces further quantum corrections to the classical transformation rules of the gauge fields and currents which additively renormalize the structure constants. The corresponding Ward identities are the c --> infinity limit of the full quantum Ward identities, and reveal that the c --> infinity limit of the quantum gauge algebra closes on fields and currents. Two examples are given. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. SUNY,INST THEORET PHYS,STONY BROOK,NY 11794. RP SEVRIN, A (reprint author), LAWRENCE BERKELEY LAB,THEORET PHYS GRP,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Sevrin, Alexander/D-5794-2017 OI Sevrin, Alexander/0000-0001-6564-9941 NR 17 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD AUG 15 PY 1993 VL 48 IS 4 BP 1768 EP 1773 DI 10.1103/PhysRevD.48.1768 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LT880 UT WOS:A1993LT88000032 ER PT J AU BONDIETTI, EA PAPASTEFANOU, C AF BONDIETTI, EA PAPASTEFANOU, C TI ESTIMATES OF RESIDENCE TIMES OF SULFATE AEROSOLS IN AMBIENT AIR SO SCIENCE OF THE TOTAL ENVIRONMENT LA English DT Article DE RESIDENCE TIME; SULFATE AEROSOLS; AMBIENT AEROSOLS ID SIZE DISTRIBUTIONS; NITRATE AB The aerodynamic size distribution of sulfates in ambient aerosol particles were measured using a high-resolution. submicron region low-pressure cascade impactor. In continental areas the mass (volume) distribution of sulfates determined by ion chromatography, was largely associated with submicron aerosols in the accumulation mode (0.1-2 mum) peaking in the 0.2-0.5 mum size range. The mass median aerodynamic diameter (MMAD) varied from 0.25 to 0.31 mum (mean 0.28 mum). The mean value of the geometric standard deviation sigma(g) was 2.06. In estimating lifetimes of sulfate aerosols, the residence times of 12 days applies to aerosols of approximately 0.3 mum MMAD size. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. NR 14 TC 4 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0048-9697 J9 SCI TOTAL ENVIRON JI Sci. Total Environ. PD AUG 15 PY 1993 VL 136 IS 1-2 BP 25 EP 31 DI 10.1016/0048-9697(93)90294-G PG 7 WC Environmental Sciences SC Environmental Sciences & Ecology GA LW523 UT WOS:A1993LW52300003 ER PT J AU WOLFENSTINE, J RUANO, OA WADSWORTH, J SHERBY, OD AF WOLFENSTINE, J RUANO, OA WADSWORTH, J SHERBY, OD TI REFUTATION OF THE RELATIONSHIP BETWEEN DENUDED ZONES AND DIFFUSIONAL CREEP SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article C1 CSIC,CTR NACL INVEST MET,E-28040 MADRID,SPAIN. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. STANFORD UNIV,DEPT MAT SCI & ENGN,STANFORD,CA 94305. RP WOLFENSTINE, J (reprint author), UNIV CALIF IRVINE,DEPT MECH & AEROSP ENGN,IRVINE,CA 92717, USA. RI Ruano, Oscar/H-1835-2015 OI Ruano, Oscar/0000-0001-6368-986X NR 18 TC 44 Z9 44 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0956-716X J9 SCRIPTA METALL MATER JI Scr. Metall. Materialia PD AUG 15 PY 1993 VL 29 IS 4 BP 515 EP 520 DI 10.1016/0956-716X(93)90157-N PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA LK902 UT WOS:A1993LK90200015 ER PT J AU MATHIS, CA TAYLOR, SE BIEGON, A ENAS, JD AF MATHIS, CA TAYLOR, SE BIEGON, A ENAS, JD TI [I-125] 5-IODO-6-NITROQUIPAZINE - A POTENT AND SELECTIVE LIGAND FOR THE 5-HYDROXYTRYPTAMINE UPTAKE COMPLEX .1. IN-VITRO STUDIES SO BRAIN RESEARCH LA English DT Article DE 5-IODO-6-NITROQUIPAZINE; SEROTONIN UPTAKE COMPLEX; SEROTONIN; IN-VITRO BINDING; BRAIN ID SEROTONIN UPTAKE SITES; H-3 PAROXETINE BINDING; RAT-BRAIN; QUANTITATIVE AUTORADIOGRAPHY; HIGH-AFFINITY; UPTAKE INHIBITORS; 6-NITROQUIPAZINE; IMIPRAMINE; CITALOPRAM; MEMBRANES AB In search of a potent and selective radioiodinated ligand for the 5-hydroxytryptamine (serotonin or 5-HT) uptake complex, we synthesized and evaluated the in vitro properties of [I-125]5-iodo-6-nitroquipazine. The binding properties and pharmacological profile of this radioligand were studied in rat brain homogenates, and it was found to display high affinity and selectivity for the serotonin uptake complex. Scatchard analysis of the binding data indicated a single population of sites with a K(d) of 23 +/- 6 pM and a B(max) of 430 +/- 50 fmol/mg protein (mean +/- S.E.M., n = 7). Inhibitors of serotonin uptake were the most efficient competitors for [I-125]5-iodo-6-nitroquipazine binding with K(i) values similar in rank order and magnitude to those obtained in studies of other established serotonin uptake blockers. Inhibitors of dopamine and norepinephrine uptake as well as a wide variety of postsynaptic receptor agents were relatively ineffective in inhibiting [I-125]5-iodo-6-nitroquipazine binding to rat brain membranes. Serotonin was the only monoaminergic neurotransmitter capable of effectively competing for [1251]5-iodo-6-nitroquipazine binding sites and gave a K(i) value of 2.8 +/- 0.6 mu M. Lesions of the serotonergic system with p-chloroamphetamine resulted in a dramatic loss ( > 90%) of [I-125]5-iodo-6-nitroquipazine binding to rat cortical membranes. Non-radiolabeled 5-iodo-6-nitroquipazine potently inhibited the binding of [H-3]paroxetine to serotonin reuptake sites in rat cortical membranes with a K(i) of 0.17 +/- 0.06 nM. These results demonstrate that 5-iodo-6-nitroquipazine is a potent and selective ligand for the serotonin uptake complex, and the [I-125]-labeled radioligand has an advantage of detecting low levels of binding sites. C1 LAWRENCE BERKELEY LAB,CTR FUNCT IMAGING,BERKELEY,CA 94720. RI Mathis, Chester/A-8607-2009 FU NINDS NIH HHS [NS-22899] NR 27 TC 33 Z9 33 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0006-8993 J9 BRAIN RES JI Brain Res. PD AUG 13 PY 1993 VL 619 IS 1-2 BP 229 EP 235 DI 10.1016/0006-8993(93)91616-Z PG 7 WC Neurosciences SC Neurosciences & Neurology GA LQ511 UT WOS:A1993LQ51100027 PM 8374781 ER PT J AU BIEGON, A MATHIS, CA HANRAHAN, SM JAGUST, WJ AF BIEGON, A MATHIS, CA HANRAHAN, SM JAGUST, WJ TI [I-125] 5-IODO-6-NITROQUIPAZINE - A POTENT AND SELECTIVE LIGAND FOR THE 5-HYDROXYTRYPTAMINE UPTAKE COMPLEX .2. IN-VIVO STUDIES IN RATS SO BRAIN RESEARCH LA English DT Article DE 5-IODO-6-NITROQUIPAZINE; SEROTONIN UPTAKE COMPLEX; SEROTONIN; IN-VIVO IMAGING; BRAIN; AUTORADIOGRAPHY ID SEROTONIN UPTAKE SITES; IMIPRAMINE BINDING-SITES; H-3 PAROXETINE BINDING; LOW-AFFINITY BINDING; AUTORADIOGRAPHIC LOCALIZATION; QUANTITATIVE AUTORADIOGRAPHY; REGIONAL DISTRIBUTION; PARKINSONS-DISEASE; HUMAN-BRAIN; IMIPRAMINE AB The in vivo regional distribution and pharmacological profile of [I-125]5-iodo-6-nitroquipazine in the rat brain were studied to evaluate this compound as a potential in vivo imaging agent of the 5-hydroxytryptamine (serotonin or 5-HT) uptake complex. This radioligand penetrated the blood-brain barrier quickly and efficiently, with 1.9% of injected dose found in the whole brain at 5 min post i.v. injection. The regional brain distribution of radioactivity at time points later than 2 h was highly correlated with the known distribution of serotonin uptake sites and terminals. Coadministration of 2 mg/kg paroxetine inhibited > 90% of the total in vivo binding of [I-125]5-iodo-6-nitroquipazine. Other serotonin uptake inhibitors, such as fluoxetine and sertraline, were also effective inhibitors of [I-125]5-iodo-6-nitroquipazine brain binding in vivo. Non-serotonergic uptake blockers (desipramine, nomifensine, and GBR-12909) and the postsynaptic serotonin receptor agent LSD had no effect on [I-125]5-iodo-6-nitroquipazine binding in vivo even at high doses. Lesioning of the serotonergic system by p-chloroamphetamine produced approximately 90% decrease in specific in vivo binding. Extraction and analysis of brain radioactivity indicated that approximately 95% of the extractable radioactivity was unmetabolized [I-125]5-iodo-6-nitroquipazine. These results indicate that [I-125]5-iodo-6-nitroquipazine is a specific, useful radioligand for studying serotonergic uptake sites and terminals in animals, and an I-123-radiolabeled form of the drug would be an excellent candidate for non-invasive single photon emission computed tomography (SPECT) imaging of these sites in the living human brain. C1 LAWRENCE BERKELEY LAB,CTR FUNCT IMAGING,BERKELEY,CA 94720. RI Mathis, Chester/A-8607-2009 FU NIA NIH HHS [AG-10129, AG-07793]; NINDS NIH HHS [NS-22899] NR 39 TC 41 Z9 41 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0006-8993 J9 BRAIN RES JI Brain Res. PD AUG 13 PY 1993 VL 619 IS 1-2 BP 236 EP 246 DI 10.1016/0006-8993(93)91617-2 PG 11 WC Neurosciences SC Neurosciences & Neurology GA LQ511 UT WOS:A1993LQ51100028 PM 8374782 ER PT J AU SOLANKI, RS APPINO, PA COHON, JL AF SOLANKI, RS APPINO, PA COHON, JL TI APPROXIMATING THE NONINFERIOR SET IN MULTIOBJECTIVE LINEAR-PROGRAMMING PROBLEMS SO EUROPEAN JOURNAL OF OPERATIONAL RESEARCH LA English DT Article DE MULTIPLE CRITERIA PROGRAMMING; LINEAR PROGRAMMING; GEOMETRICAL APPROXIMATION AB The aim of this paper is to develop algorithms for approximating the noninferior set in the objective space for multiobjective linear programming problems with three or more objectives. A geometrical measure of error is used in controlling the number of extreme points needed in generating an approximation of desired accuracy. In more specific terms, the error in the approximation is estimated by computing the deviation of a polytope containing the entire noninferior set (the upper bounding polytope) from a lower bounding polytope whose interior is known to be inferior. Extreme points are added to the approximation in an attempt to reduce the deviation between the two polytopes in as few computations as possible. The facets in the approximation of the noninferior set are obtained by computing the convex hull of the extreme points generated by the algorithm. Suitable tests are developed to determine those facets of the convex hull that belong to the approximation. C1 IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. RP SOLANKI, RS (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 20 TC 25 Z9 25 U1 1 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-2217 J9 EUR J OPER RES JI Eur. J. Oper. Res. PD AUG 13 PY 1993 VL 68 IS 3 BP 356 EP 373 DI 10.1016/0377-2217(93)90192-P PG 18 WC Management; Operations Research & Management Science SC Business & Economics; Operations Research & Management Science GA LM709 UT WOS:A1993LM70900007 ER PT J AU CORBETT, JD ECKERT, J JAYASOORIYA, UA KEARLEY, GJ WHITE, RP ZHANG, J AF CORBETT, JD ECKERT, J JAYASOORIYA, UA KEARLEY, GJ WHITE, RP ZHANG, J TI INELASTIC NEUTRON-SCATTERING STUDY OF THE METAL CLUSTER COMPOUND LI6[ZR6CL1H] SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Article ID INTERSTITIAL HYDROGEN; SPECTROMETER AB The optic modes of the hydrogen in the metal cluster compound Li6[Zr6Cl18H] are observed at 480 and 790 cm-1 using incoherent inelastic neutron scattering spectroscopy at approximately 15 K, and confirmed using the spectrum of the deuterium substituted compound. This observation is rationalized in terms of a model with the hydrogen occupying a mu3-bridging position within the octahedral interstitial site with a Zr-H bond distance of ca. 2.0 angstrom. The terminal and bridge bonded chlorine vibrations are observed at frequencies of approximately 280 and approximately 190 cm-1, respectively. C1 UNIV E ANGLIA,SCH CHEM SCI,NORWICH NR4 7TJ,NORFOLK,ENGLAND. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 18 TC 7 Z9 7 U1 0 U2 1 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 AUG 12 PY 1993 VL 97 IS 32 BP 8384 EP 8386 DI 10.1021/j100134a004 PG 3 WC Chemistry, Physical SC Chemistry GA LW905 UT WOS:A1993LW90500004 ER PT J AU MANDULA, JE OGILVIE, MC AF MANDULA, JE OGILVIE, MC TI A NEW TECHNIQUE FOR MEASURING THE STRANGENESS CONTENT OF THE PROTON ON THE LATTICE SO PHYSICS LETTERS B LA English DT Article AB A new technique for computing the strangeness content of the proton on the lattice is described. It is applied to the calculation of the strange quark contribution to the proton's spin, specifically to the evaluation of the matrix element [ps\sgamma(mu)gamma5sBAR\ps]. Preliminary results are consistent with the EMC experiment, and with zero. C1 WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. RP MANDULA, JE (reprint author), US DOE,DIV HIGH ENERGY PHYS,WASHINGTON,DC 20585, USA. NR 19 TC 6 Z9 6 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 AUG 12 PY 1993 VL 312 IS 3 BP 327 EP 332 DI 10.1016/0370-2693(93)91088-5 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LR734 UT WOS:A1993LR73400010 ER PT J AU ALBINATI, A BAKHMUTOV, VI CAULTON, KG CLOT, E ECKERT, J EISENSTEIN, O GUSEV, DG GRUSHIN, VV HAUGER, BE KLOOSTER, WT KOETZLE, TF MCMULLAN, RK OLOUGHLIN, TJ PELISSIER, M RICCI, JS SIGALAS, MP VYMENITS, AB AF ALBINATI, A BAKHMUTOV, VI CAULTON, KG CLOT, E ECKERT, J EISENSTEIN, O GUSEV, DG GRUSHIN, VV HAUGER, BE KLOOSTER, WT KOETZLE, TF MCMULLAN, RK OLOUGHLIN, TJ PELISSIER, M RICCI, JS SIGALAS, MP VYMENITS, AB TI REACTION OF H-2 WITH IRHCL2P2 (P = P(I)PR(3) OR P(T)BU2PH) - STEREOELECTRONIC CONTROL OF THE STABILITY OF MOLECULAR H-2 TRANSITION-METAL COMPLEXES SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID D6 ML5 COMPLEXES; POLYHYDRIDE COMPLEXES; HYDROGEN COMPLEXES; OXIDATIVE ADDITION; H-H; R =; DIHYDROGEN COMPLEXES; NONCLASSICAL ISOMERS; NEUTRON-DIFFRACTION; WILKINSON CATALYST AB IrHCl2P2 (P = PiPr3) reacts rapidly with H-2 at 25-degrees-C to set up an equilibrium where H-2 binds trans to the original hydride ligand (trans-2). A second slower reaction forms IrH(H2)Cl2P2 (cis-2), where the cis disposition of the chlorides, and also H cis to H-2, was established by neutron diffraction. This molecule (unlike trans-2), shows rapid site exchange between coordinated H and H-2. cis-2 can be induced to lose HCl to form Ir(H)2ClP2 (3). The structure of Ir(H)2Cl(PtBu2Ph)2, an analog of 3, was shown by neutron diffraction to have a planar H2IrCl in a Y shape, with Cl at the base of the Y and a H-Ir-H angle of only 73-degrees. ECP ab initio calculations of IrH2Cl(PH3)2 show that the Y shape with a H-Ir-H angle close to the experimental value has the minimum energy. They also show that the trans-2 isomer of IrH(H2)Cl2(PH3)2 is less stable than the cis-2 isomer by 10.3 kcal/mol. The Ir-H-2 interaction is stronger in cis-2. The rotational barrier has been calculated in the two isomers as 2.3 (trans) and 6.5 (cis) kcal/mol. In agreement with the experimental structure, the H-H bond is found to eclipse preferentially the Ir-H bond in cis-2. The calculations also show that the Ir-H-2 bond dissociation energy is greater in cis-2. It thus appears that the binding ability of a metal fragment not only depends on its ligands but is also linked in a subtle way to its stereochemistry. The J(HD) value for coordinated H-2 in cis-2 is 12 +/- 3 Hz. The implication of this small value and of a T1min(200 MHz) of 38 ms is an H/H distance of 1.07-1.35 angstrom, which compares to the neutron diffraction distance of 1.11(3) angstrom. The Ir-H distances of cis-2 are unprecedented in that the hydride-Ir distance (1.584(13) angstrom) is not shorter than the distances to the H-2 hydrogens (1.537(19) and 1.550(17) angstrom). One of the H-2 hydrogens interacts with chloride of an adjacent molecule to give an infinite hydrogen-bonded polymer. An inelastic neutron scattering spectroscopic study on solid IrHCl2(H2)(PiPr3)2 sets a lower limit on the rotational barrier of the Ir(H2) unit of 2.0 kcal/mol. Ab initio calculations on IrHCl2(H2)(PH3)2 yield a H-H distance in these two isomers of 0.81 and 1.4 angstrom, respectively, showing that the moiety IrHCl2(PH3)2 with chlorides mutually cis is a much stronger reducing agent than that with chlorides trans (and thus H trans to H-2). Crystallographic data: For cis-2 (at 15K), a = 13.008(4) angstrom, b = 11.296 (4) angstrom, c = 16.095(4) angstrom in space group Pna2(1) (Z = 4). For Ir(H)2Cl(PtBu2Ph)2 (at 15K), a = 8.236(2) angstrom, b = 17.024(6) angstrom, c = 20.528(10) angstrom, beta = 96.27(4)degrees in space group P2(1)/c (Z = 4). C1 INDIANA UNIV,DEPT CHEM,BLOOMINGTON,IN 47405. RUSSIAN ACAD SCI,INST ORGANOELEMENT CPDS,NMR LAB,MOSCOW,RUSSIA. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. UNIV PARIS 11,CHIM THEOR LAB,F-91405 ORSAY,FRANCE. UNIV OTTAWA,DEPT CHEM,OTTAWA K1N 6N5,ONTARIO,CANADA. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV POITIERS,CATALYSE CHIM ORGAN LAB,F-86022 POITIERS,FRANCE. ARISTOTELIAN UNIV SALONIKA,APPL QUANTUM CHEM LAB,SALONIKA,GREECE. RP ALBINATI, A (reprint author), UNIV MILAN,IST CHIM FARMACEUT,I-20131 MILAN,ITALY. RI Goussev, Dmitri/H-3775-2013; Clot, Eric/P-9585-2015; Eisenstein, Odile/I-1704-2016; Albinati, Alberto/I-1262-2015 OI Goussev, Dmitri/0000-0003-3302-356X; Clot, Eric/0000-0001-8332-5545; Eisenstein, Odile/0000-0001-5056-0311; Albinati, Alberto/0000-0002-8779-3327 NR 80 TC 117 Z9 117 U1 1 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 11 PY 1993 VL 115 IS 16 BP 7300 EP 7312 DI 10.1021/ja00069a032 PG 13 WC Chemistry, Multidisciplinary SC Chemistry GA LT674 UT WOS:A1993LT67400032 ER PT J AU BLATTER, F FREI, H AF BLATTER, F FREI, H TI VERY STRONG STABILIZATION OF ALKENE-O2 CHARGE-TRANSFER STATE IN ZEOLITE NAY - RED-LIGHT-INDUCED PHOTOOXIDATION OF 2,3-DIMETHYL-2-BUTENE SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID CRYOGENIC OXYGEN MATRIX; PHOTOCHEMICAL-REACTIONS; ABSORPTION-SPECTRA; ELECTRON-TRANSFER; HYDROCARBONS; REFLECTANCE; SUPERCAGES; OLEFINS; BAND C1 LAWRENCE BERKELEY LAB,CHEM BIODYNAM LAB,BERKELEY,CA 94720. NR 37 TC 82 Z9 84 U1 0 U2 2 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 AUG 11 PY 1993 VL 115 IS 16 BP 7501 EP 7502 DI 10.1021/ja00069a059 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA LT674 UT WOS:A1993LT67400059 ER PT J AU TAAM, RE WOOSLEY, SE WEAVER, TA LAMB, DQ AF TAAM, RE WOOSLEY, SE WEAVER, TA LAMB, DQ TI SUCCESSIVE X-RAY-BURSTS FROM ACCRETING NEUTRON-STARS SO ASTROPHYSICAL JOURNAL LA English DT Article DE ACCRETION, ACCRETION DISKS; STARS, NEUTRON; X-RAYS, BURSTS ID EVOLUTION; FLASHES AB The evolution of a neutron star undergoing a series of thermonuclear flashes in its accreted hydrogen-rich layer has been numerically followed to determine the effects of the history of the neutron star's thermal and compositional structure on the properties of the emitted X-ray bursts. The burst characteristics have been studied for a range of mass accretion rates, CNO abundances in the accreted matter, and initial thermal states of the underlying neutron star core. It is found that the bursts exhibit erratic behavior, especially for low CNO metal abundances and cool neutron star cores, with the burst recurrence time scales varying by one to two orders of magnitude. The results of the calculations directly illustrate the importance of compositional and thermal inertia on burst behavior. A common characteristic of these models is the continued presence of a substantial amount of unburnt hydrogen in the accreted layer throughout the series of the X-ray burst events. Convective mixing during the quiescent phase leads to the inward transport of helium to high densities and eventually to the initiation of the next outburst. The resulting bursts can be weak and, in such cases, are characterized by short recurrence time scales (approximately 1-2 hr), low peak luminosities (approximately 0.1-0.2 times the Eddington value), and low alpha-values (approximately 20). The numerical results indicate that such mixing can lead to an irregular pattern of unstable nuclear burning, and it is suggested that this irregularity is manifested as the erratic bursting behavior seen in X-ray transients like 1608 - 522 and EXO 0748 - 67. C1 LAWRENCE LIVERMORE NATL LAB,DEPT PHYS L298,GEN STUDIES GRP,LIVERMORE,CA 94550. UNIV CALIF SANTA CRUZ,LICK OBSERV,BOARD STUDIES ASTRON & ASTROPHYS,SANTA CRUZ,CA 95064. UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. RP TAAM, RE (reprint author), NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208, USA. NR 34 TC 89 Z9 89 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 AUG 10 PY 1993 VL 413 IS 1 BP 324 EP 332 DI 10.1086/173000 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LP771 UT WOS:A1993LP77100031 ER PT J AU GUNDERSEN, JO CLAPP, AC DEVLIN, M HOLMES, W FISCHER, ML MEINHOLD, PR LANGE, AE LUBIN, PM RICHARDS, PL SMOOT, GF AF GUNDERSEN, JO CLAPP, AC DEVLIN, M HOLMES, W FISCHER, ML MEINHOLD, PR LANGE, AE LUBIN, PM RICHARDS, PL SMOOT, GF TI A DEGREE SCALE ANISOTROPY MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND NEAR THE STAR GAMMA-URSAE-MINORIS SO ASTROPHYSICAL JOURNAL LA English DT Article DE COSMIC MICROWAVE BACKGROUND; COSMOLOGY, OBSERVATIONS ID RADIATION; COBE AB Results from a search for anisotropy in the cosmic microwave background (CMB) are presented from the third flight of the Millimeter-wave Anisotropy eXperiment. Observations were made at 6, 9, and 12 cm-1 with a 0-degrees-5 FWHM beam and a 1-degrees-3 sinusoidal chop. The CMB observation occurred over 1.37 hours and covered a 6.24 deg2 area of the sky where very little foreground emission is expected. Significant correlated structure is observed at 6 and 9 cm-1. At 12 cm-1 we place an upper limit on the structure. The relative amplitudes at 6, 9, and 12 cm-1 are consistent with a CMB spectrum. The spectrum of the structure is inconsistent with thermal emission from known forms of interstellar dust. Synchrotron and free-free emission would both require unusually flat spectral indices at cm wavelengths in order to account for the amplitude of the observed structure. Although known systematic errors are not expected to contribute significantly to any of the three optical channels, excess sidelobe contamination cannot be definitively ruled out. If all the structure is attributed to CMB anisotropy, a value of the weighted rms of the 6 and 9 cm-1 channels of AT(rms)/T(CMB) = 4.7 +/- 0.8 x 10(-5) (+/-1 sigma) was measured. If the CMB anisotropy is assumed to have a Gaussian autocorrelation function with a coherence angle of 25', then the most probable value is AT(rms)/T(CMB) = 4.2-1.1(+1.7) x 10(-5) where the +/- refers to the 95% confidence limits. These values are similar to a measurement made in the same region of the sky on a previous flight; however, this lower limit is larger than the upper limit that was obtained in a different region of the sky during the same flight. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,NSF CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. RP GUNDERSEN, JO (reprint author), UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106, USA. NR 22 TC 67 Z9 67 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 AUG 10 PY 1993 VL 413 IS 1 BP L1 EP L5 DI 10.1086/186945 PN 2 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LP774 UT WOS:A1993LP77400001 ER PT J AU KETO, E BALL, R ARENS, J JERNIGAN, G MEIXNER, M SKINNER, C GRAHAM, J AF KETO, E BALL, R ARENS, J JERNIGAN, G MEIXNER, M SKINNER, C GRAHAM, J TI THE MIDINFRARED RADIO CORRELATION AT HIGH ANGULAR RESOLUTION - NGC-253 SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, INDIVIDUAL (NGC-253); GALAXIES, STARBURST; INFRARED, GALAXIES ID STAR-FORMATION; SPIRAL GALAXIES; 10 MICRONS; EMISSION; NUCLEUS; REGIONS AB We present high angular resolution (1''.2), narrow-band (DELTAlambda/lambda = 0.1) images of the nucleus of NGC 253 at three wavelengths in the mid-infrared (8.5, 10.0, and 12.5 mum). We find that most of the mid-IR flux in the nucleus of NGC 253 derives from a very small region less-than-or-equal-to 120 pc in diameter. Within this small region there are three spatially and spectrally distinct IR components: two bright compact sources, and a surrounding envelope of low-level, diffuse emission. The mid-IR and 6 cm radio are loosely correlated in position but not in brightness. The implication is that the mid-IR-radio correlation may begin to break down on small spatial scales relevant to individual star-forming regions and large individual sources. These variations in the mid-IR spectra and in the radio-IR correlation imply that the nuclear emission is excited by more than one mechanism and source type. C1 UNIV HAWAII,NASA,INFRARED TELESCOPE FACIL,HONOLULU,HI 96822. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. RP KETO, E (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808 L-59,LIVERMORE,CA 94550, USA. NR 32 TC 29 Z9 29 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 AUG 10 PY 1993 VL 413 IS 1 BP L23 EP L26 DI 10.1086/186950 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LP774 UT WOS:A1993LP77400006 ER PT J AU TAVANI, M BROOKSHAW, L AF TAVANI, M BROOKSHAW, L TI HIDDEN SLOW PULSARS IN BINARIES SO ASTROPHYSICAL JOURNAL LA English DT Article DE BINARIES, ECLIPSING; PULSARS, GENERAL; PULSARS, INDIVIDUAL (PSR-1718-19); STARS, NEUTRON ID ECLIPSING MILLISECOND PULSAR; RADIO PULSARS; STARS; HYDRODYNAMICS; EVOLUTION; ACCRETION; TERZAN-5; WIND AB The recent discovery of the binary containing the slow pulsar PSR 1718-19 orbiting around a low-mass companion star adds new light on the characteristics of binary pulsars. The properties of the radio eclipses of PSR 1718 - 19 are the most striking observational characteristics of this system. The surface of the companion star produces a mass outflow which leaves only a small ''window'' in orbital phase for the detection of PSR 1718 - 19 around 400 MHz. At this observing frequency, PSR 1718 - 19 is clearly observable only for approximately 1 hr out of the total 6.2 hr orbital period. The aim of this Letter is twofold: (1) to model the hydrodynamical behavior of the eclipsing material from the companion star of PSR 1718 - 19 and (2) to argue that a population of binary slow pulsars might have escaped detection in pulsar surveys carried out at 400 MHz. The possible existence of a population of partially or totally hidden slow pulsars in binaries will have a strong impact on current theories of binary evolution of neutron stars. C1 PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. RP TAVANI, M (reprint author), PRINCETON UNIV,JOSEPH HENRY LABS,PRINCETON,NJ 08544, USA. NR 35 TC 4 Z9 4 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 AUG 10 PY 1993 VL 413 IS 1 BP L39 EP L42 DI 10.1086/186954 PN 2 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LP774 UT WOS:A1993LP77400010 ER PT J AU KENNEDY, MA NUUTERO, ST DAVIS, JT DROBNY, GP REID, BR AF KENNEDY, MA NUUTERO, ST DAVIS, JT DROBNY, GP REID, BR TI MOBILITY AT THE TPA CLEAVAGE SITE IN THE T3A3-CONTAINING AHAIII AND PMEI RESTRICTION SEQUENCES SO BIOCHEMISTRY LA English DT Article ID MAGNETIC-RESONANCE SPECTRA; RESTRAINED MOLECULAR-DYNAMICS; ROTATING FRAME; DNA CURVATURE; TRP OPERATOR; PRIBNOW BOX; ELECTROPHORETIC MOBILITIES; CONFORMATIONAL TRANSITIONS; ESCHERICHIA-COLI; NMR-RELAXATION AB Lefevre et al. originally observed conformational transitions at the TpA step in the TTAA Pribnow box sequence of the trp promoter [Lefevre, J.-F., Lane, A. N., & Jardetzky, O. (1985) FEBS Lett. 190, 37-401. In 500-MHz H-1 NMR studies on the T(n)A(n)-containing DNA oligonucleotides [d(CGAGGTTTAAACCTCG)]2, [d(GCTCCTTTAAAGGAGC)]2,and [d(GCCGTTAACGGC)]2, we observe that, in addition to the H2 proton (which resides in the minor groove of DNA), the H8 proton of the first adenine (which resides in the major groove) is also broadened due to motion at the TpA junction. In analogous 16-mers where the T3A3 segment has been replaced by an A3T3 sequence, and therefore contains CA, GA, and AT steps (but no TA steps), all adenine proton resonances are narrow, indicating that the broadening occurs only at TpA steps. Assuming chemical exchange in the form of conformational dynamics, e.g., oscillation of the purine base about the glycosidic torsion angle, the experimental 500-MHz H-1 T1rho and 2D-NOESY data were used to constrain the correlation time of the internal motion to a range between the T1 and T1rho minima. Calculated line shapes using a two-site exchange model indicate that the motion has an amplitude of 20-50-degrees with an associated tau(c) of Ca. 1.6 x 10(-4) to 1.0 X 10(-5) s rad-1, respectively. The mobility appears to be a consequence of the structure at the TpA junction which is characterized by (1) a wide minor groove between two regions of narrow minor groove, (2) an unusual average orientation of the adenine heterocycle probably resulting from a poor base-stacking interaction of the adenine with the preceding thymine, and (3) a sharp discontinuity in the sugar conformation at the TpA step. C1 UNIV WASHINGTON, DEPT CHEM, SEATTLE, WA 98195 USA. UNIV WASHINGTON, DEPT BIOCHEM, SEATTLE, WA 98195 USA. RP KENNEDY, MA (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. FU NIGMS NIH HHS [GM32681, F32 GM14340-01] NR 78 TC 39 Z9 39 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD AUG 10 PY 1993 VL 32 IS 31 BP 8022 EP 8035 DI 10.1021/bi00082a025 PG 14 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA LV436 UT WOS:A1993LV43600025 PM 8347604 ER PT J AU TOROK, TI RARD, JA MILLER, DG AF TOROK, TI RARD, JA MILLER, DG TI VISCOSITIES, ELECTROLYTIC CONDUCTIVITIES, AND VOLUMETRIC PROPERTIES OF HCL-MCL(X)-H2O AS A FUNCTION OF TEMPERATURE UP TO HIGH MOLAL IONIC STRENGTHS SO FLUID PHASE EQUILIBRIA LA English DT Article; Proceedings Paper CT 11TH SYMP ON THERMOPHYSICAL PROPERTIES CY JUN 23-27, 1991 CL UNIV COLORADO, BOULDER, CO SP AMER SOC MECH ENGINEERS, HEAT TRANSFER DIV, NIST HO UNIV COLORADO DE EXPERIMENTAL DATA; DENSITY; ELECTROLYTIC CONDUCTIVITY; VISCOSITY; TERNARY AQUEOUS SOLUTIONS; MOLALITY CORRELATIONS; TEMPERATURE CORRELATIONS ID SYSTEM; MGCL2-HCL-H2O; DENSITIES; CHLORIDE; MIXTURES AB The experimental determination and analysis of densities (rho), electrolytic conductivities (kappa), and viscosities (eta) has been performed in one of our laboratories (University of Miskolc) for the systems Ha-LaCl3-H2O and HCl-M(II)Cl2-H2O where M denotes Mn, Cu, or Cd. These quantities are required, for example, for the design and control of industrial processes involving these ternary systems. Experimental values were reported elsewhere. These large sets of experimental data for Ha-LaCl3-H2O are now represented by empirical functions of temperature (T), the molality of HCl (m1), and the molality of LaCl3 (M2). The range of these experimental variables was m1 = 0.2 to 10.0 mol kg-1, m2 = 0.2 to 4 mol kg-1, and T = 283.15 to 328.15 K. Plots are also given for the deviations of volume, kappa, and eta from simple ideal mixing rules at constant T for Ha-LaCl3-H2O and Ha-MCl2-H2O. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV MISKOLC,DEPT PHYS CHEM,H-3515 MISKOLC,HUNGARY. RP TOROK, TI (reprint author), UNIV MISKOLC,DEPT NON FERROUS MET,H-3515 MISKOLC,HUNGARY. NR 30 TC 9 Z9 9 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 AUG 10 PY 1993 VL 88 BP 263 EP 275 DI 10.1016/0378-3812(93)87117-J PG 13 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA LR861 UT WOS:A1993LR86100023 ER PT J AU MORRIS, E DETRICK, RS MINSHULL, TA MUTTER, JC WHITE, RS SU, WS BUHL, P AF MORRIS, E DETRICK, RS MINSHULL, TA MUTTER, JC WHITE, RS SU, WS BUHL, P TI SEISMIC STRUCTURE OF OCEANIC-CRUST IN THE WESTERN NORTH-ATLANTIC SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH LA English DT Article ID SPUR FRACTURE-ZONE; MAGMA CHAMBER; SYNTHETIC SEISMOGRAMS; MICROEARTHQUAKES BENEATH; VELOCITY STRUCTURE; CONTINENTAL RIFTS; MEDIAN VALLEY; RIDGE; OPHIOLITE; 23-DEGREES-N AB We examine the seismic structure of Cretaceous-aged ocean crust north of the Blake Spur fracture zone in the western North Atlantic by using a combination of multichannel seismic and wide-angle reflection/refraction data. Although the oceanic crust in this area is characterized by a relatively uniform thickness and seismic velocity structure, it displays large variations in crustal reflectivity on both ridge-normal and ridge-parallel profiles. The upper crust is highly reflective and contains both subhorizontal (or shallow dipping) events and more steeply dipping reflectors. Subhorizontal reflectors are typically present between 1.5 and 2 km depth and are, in some cases, laterally continuous for distances of 15 to 20 km. Generally, these events do not correlate with the depth of the seismic layer 2/layer 3 boundary determined from refraction data, and their origin is still poorly understood. The steeply dipping events are generally confined to the upper 2.5 km of the crust. We interpret these reflectors as the subsurface expression of ridge-parallel extensional faults commonly Mapped at mid-ocean ridges. The lower crust in this area exhibits alternating regions of high and low reflectivity. The highly reflective zones are made up of packages of linear or concave-upward dipping reflectors that flatten out in a diffuse zone of high reflectivity near the base of the crust. Some of these dipping reflectors appear to cut through the whole crustal section, although most fade out in the acoustically transparent midcrust. On ridge-normal profiles the majority of these events dip to the east, toward the paleo-spreading center, whereas on ridge-parallel profiles the events typically dip south, toward the Blake Spur fracture zone. The base of the crust is generally not associated with a strong, discrete Moho reflection but is a comparatively indistinct boundary usually associated with a 1- to 2-km-thick band of diffuse high reflectivity. We interpret the lower crustal and whole crustal dipping events as the subsurface expression of major fault systems that have ruptured the entire crustal section down to depths of 8-10 km. With the available data we cannot unambiguously determine the geometrical relationship between the dipping lower crustal reflectors on the ridge-normal and ridge-parallel profiles. We may be imaging a single major detachment surface that dips both toward the ridge axis and away from accommodation zones linking major boundary faults. Alternatively, these events may represent two different classes of fault systems that form during different stages of the emplacement and aging of oceanic lithosphere. C1 LAMONT DOHERTY EARTH OBSERV, PALISADES, NY 10964 USA. WOODS HOLE OCEANOG INST, WOODS HOLE, MA 02543 USA. UNIV CAMBRIDGE, BULLARD LABS, CAMBRIDGE CB3 0EZ, ENGLAND. RP NATL RENEWABLE ENERGY LAB, 409 12TH ST SW, WASHINGTON, DC 20024 USA. RI Minshull, Timothy/D-1147-2010; White, Robert/B-8453-2015 OI Minshull, Timothy/0000-0002-8202-1379; NR 49 TC 59 Z9 59 U1 0 U2 3 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 AUG 10 PY 1993 VL 98 IS B8 BP 13879 EP 13903 DI 10.1029/93JB00557 PG 25 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LT337 UT WOS:A1993LT33700007 ER PT J AU GASTEIGER, HA ROSS, PN CAIRNS, EJ AF GASTEIGER, HA ROSS, PN CAIRNS, EJ TI LEIS AND AES ON SPUTTERED AND ANNEALED POLYCRYSTALLINE PT-RU BULK ALLOYS SO SURFACE SCIENCE LA English DT Article ID ENERGY ION-SCATTERING; AUGER-ELECTRON SPECTROSCOPY; SURFACE FREE-ENERGIES; BIMETALLIC CLUSTERS; ATOMIC-LAYER; SOLID METALS; SEGREGATION; OXIDATION; CATALYSTS; PLATINUM AB Low energy ion scattering spectroscopy (LEIS) and Auger electron spectroscopy (AES) were performed on sputtered and UHV annealed polycrystalline Pt-Ru bulk alloys over the entire compositional range. LEIS spectra were acquired with an estimated sputter damage of less than 0.5% of a monolayer by employing He-4+ ions with an energy of 2 keV and a current density of 20 nA/cm2. The partial overlap of the scattering peaks of Pt and Ru made it necessary to devise a method to numerically fit the data. LEIS showed that sputter-cleaning with 0.5 keV Ar+ ions at 63-degrees incidence does not effect any preferential sputtering. Annealing at 800-degrees-C in UHV causes a strong surface enrichment in Pt for equilibrated Pt-Ru alloys. The alloy with a hcp bulk lattice (9.5 at% Pt) exhibited a larger segregation than the fcc alloys (> 35 at% Pt), which we rationalized with the lattice mismatch between the bulk and the surface face structure, resulting in a loosely packed surface. Second-layer compositions of annealed specimens were extracted from AES and LEIS data, utilizing a calibration method based on Auger signals of the continuously sputtered surface. A smooth decay of the enriched outermost layer composition towards the bulk composition was assessed. The platinum surface enrichment of annealed bulk alloys was contrasted with the segregation observed for bimetallic supported clusters of Pt and Ru. Ideal solution thermodynamics, utilizing surface free energy data and molar surface area data from the literature, was able to predict the measured segregation for the UHV annealed bulk alloys. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP GASTEIGER, HA (reprint author), UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720, USA. RI Cairns, Elton/E-8873-2012 OI Cairns, Elton/0000-0002-1179-7591 NR 59 TC 179 Z9 179 U1 2 U2 22 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 10 PY 1993 VL 293 IS 1-2 BP 67 EP 80 DI 10.1016/0039-6028(93)90244-E PG 14 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LR494 UT WOS:A1993LR49400017 ER PT J AU THUNDAT, T SALES, BC CHAKOUMAKOS, BC BOATNER, LA ALLISON, DP WARMACK, RJ AF THUNDAT, T SALES, BC CHAKOUMAKOS, BC BOATNER, LA ALLISON, DP WARMACK, RJ TI ATOMIC LAYER-BY-LAYER SURFACE REMOVAL BY FORCE MICROSCOPY SO SURFACE SCIENCE LA English DT Letter ID LEAD PYROPHOSPHATE; GLASS STATE; RESOLUTION AB Using an atomic force microscope (AFM) operating under ambient conditions, we have obtained the first atomic resolution AFM images of atomic-scale defects and have observed the scanning induced removal of atoms from lead pyrophosphate cleavage faces. Repeated scanning of the same surface area revealed cyclic changes in the Pb2P2O7 atomic structure consistent with a layer-by-layer removal of atoms. Subsequent large area imaging of a region that had been subjected to repeated scanning revealed a depression several nanometers deep, indicating that this technique may be applicable to patterning the surfaces of materials on an atomic scale. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RI Chakoumakos, Bryan/A-5601-2016; Boatner, Lynn/I-6428-2013 OI Chakoumakos, Bryan/0000-0002-7870-6543; Boatner, Lynn/0000-0002-0235-7594 NR 24 TC 19 Z9 19 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD AUG 10 PY 1993 VL 293 IS 1-2 BP L863 EP L869 DI 10.1016/0039-6028(93)90236-D PG 7 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LR494 UT WOS:A1993LR49400009 ER PT J AU MURRAY, PE AF MURRAY, PE TI EFFECT OF AN EIGENSTRAIN ON SLOW VISCOUS-FLOW OF COMPRESSIBLE FLUID FILMS SO APPLIED PHYSICS LETTERS LA English DT Article ID STRESS; OXIDATION; SIO2; SILICON AB We present a general formulation of the mechanics of slow viscous flow of slightly compressible fluid films in the presence of an eigenstrain. An eigenstrain represents a constrained volume change due to temperature, concentration of a dissolved species, or a chemical transformation. A silicon dioxide film grown on a silicon surface is an example of a viscous fluid film that is affected by a constrained volume change. We obtain a general expression for pressure in a fluid film produced by a surface chemical reaction accompanied by a volume change. This result is used to study the effect of an eigenstrain on viscous stress relaxation in fluid films. RP MURRAY, PE (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 9 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 9 PY 1993 VL 63 IS 6 BP 743 EP 745 DI 10.1063/1.109922 PG 3 WC Physics, Applied SC Physics GA LR258 UT WOS:A1993LR25800013 ER PT J AU TAN, ZQ NAMAVAR, F HEALD, SM BUDNICK, JI AF TAN, ZQ NAMAVAR, F HEALD, SM BUDNICK, JI TI SEQUENTIAL-ION-IMPLANTATION SYNTHESIS OF TERNARY METAL SILICIDES SO APPLIED PHYSICS LETTERS LA English DT Article ID BURIED COSI2 LAYERS; STRUCTURAL EVOLUTION; CO IMPLANTATION; BEAM SYNTHESIS; 111 SI; MICROSTRUCTURE; SILICON; SI(100) AB By implanting two different metals in sequence into Si(100), we find that new ternary silicides can by synthesized with simple binary silicide structures. The synthesis of CoSi2-type (Co,Fe)Si2, and CoSi-type (Co,Fe)Si and (Fe,Ni)Si is demonstrated. The structure is largely determined by the first implanted metal and the total dose of the two metals, allowing one to design the structure of the ternary silicide. The two implanted species occupy equivalent positions in the same structure and the metal composition may be continuously varied in a given structure. This opens new possibilities for the synthesis of ternary and multinary compounds and alloys. C1 SPIRE CORP,BEDFORD,MA 01730. UNIV CONNECTICUT,INST MAT SCI,STORRS,CT 06269. UNIV CONNECTICUT,DEPT PHYS,STORRS,CT 06269. RP TAN, ZQ (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 17 TC 16 Z9 16 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 9 PY 1993 VL 63 IS 6 BP 791 EP 793 DI 10.1063/1.109909 PG 3 WC Physics, Applied SC Physics GA LR258 UT WOS:A1993LR25800029 ER PT J AU GALLOWAY, N SCHULZE, MP GREENOUGH, RD JILES, DC AF GALLOWAY, N SCHULZE, MP GREENOUGH, RD JILES, DC TI ENHANCED DIFFERENTIAL MAGNETOSTRICTIVE RESPONSE IN ANNEALED TERFENOL-D SO APPLIED PHYSICS LETTERS LA English DT Article ID SINGLE-CRYSTALS AB The field and pressure dependencies of the magnetostriction Of Tb0.316Dy0.684Fe1.982 have been measured in a grain-oriented rod after thermally annealing for 1 day at 850-degrees-C and for 4 days at 950-degrees-C in an argon atmosphere. The results of the heat treatment are a fivefold increase in the strain coefficient d33(=dlambda/dH) and a 100% increase in the maximum strain (lambda). There was also an increase in the lambda-vs-H hysteresis. Under compressive uniaxial stress there was virtually no bulk change in magnetostrictive strain until the field exceeded a critical value which depended on the applied stress, for instance approximately 12 kA/m under a stress of 6 MPa. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP GALLOWAY, N (reprint author), UNIV HULL,DEPT APPL PHYS,KINGSTON HULL HU6 7RX,N HUMBERSIDE,ENGLAND. RI Jiles, David/H-9548-2012 NR 8 TC 10 Z9 10 U1 1 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 AUG 9 PY 1993 VL 63 IS 6 BP 842 EP 844 DI 10.1063/1.110776 PG 3 WC Physics, Applied SC Physics GA LR258 UT WOS:A1993LR25800046 ER PT J AU KIM, KJ LYNCH, DW AF KIM, KJ LYNCH, DW TI OPTICAL-PROPERTIES OF CEAL2 AND LUAL2 SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article ID ELECTRONIC-STRUCTURE; FERMI-SURFACE; CERIUM; CECU6 AB The optical properties of CeAl2 and LuAl2 were investigated in the 0.04-4.5 eV region using ellipsometry and reflectivity measurements. At low energies, the optical conductivity for CeAl2 showed two structures at about 0.1 and 1 eV, which were not found for LuAl2. These structures can be understood as due to interband transitions, d --> f and f --> d, between band-like 4f and 5d character near the Fermi level. At higher energies above 1 eV, the optical conductivity spectra for both compounds show similar behaviours with structures at about 2 eV for both compounds and a structure at about 3 eV for CeAl2 and at about 4 eV for LuAl2. The 2 eV structures for both compounds can be assigned as d --> p transitions with the p character existing just above the f bands and the 3 and 4 eV structures may contain s --> p transitions in addition to d --> p transitions, with the s character existing near the Fermi level through hybridization with the d bands. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. RP KIM, KJ (reprint author), KONKUK UNIV, DEPT PHYS, SEOUL 133701, SOUTH KOREA. NR 14 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 9 PY 1993 VL 5 IS 32 BP 5971 EP 5974 DI 10.1088/0953-8984/5/32/025 PG 4 WC Physics, Condensed Matter SC Physics GA LR829 UT WOS:A1993LR82900025 ER PT J AU CURTRIGHT, T ZACHOS, C AF CURTRIGHT, T ZACHOS, C TI SUPERSYMMETRY AND THE NONLOCAL YANGIAN DEFORMATION SYMMETRY SO NUCLEAR PHYSICS B LA English DT Article ID NONLINEAR-SIGMA-MODEL; FIELD-THEORY; CHARGES; TRACE AB In the quantized two-dimensional nonlinear supersymmetric sigma-model, the supercurrent supermultiplet, which contains the energy-momentum tensor, is transformed by the nonlocal symmetry of the model into the isospin current supermultiplet. This effect incorporates supersymmetry into the known infinite-dimensional yangian deformation symmetry of plain sigma-models, leads to precisely the same nontrivial extension of the two-dimensional super-Poincare group as found previously for the Poincare group, and thus determines the theory's mass spectrum. A generalization to all higher-order nonlocal charges is conjectured such that their generating function, the so-called ''master charge'', has a definite Lorentz spin which depends on the spectral parameter. C1 ARGONNE NATL LAB, DIV HIGH ENERGY PHYS, ARGONNE, IL 60439 USA. RP UNIV MIAMI, DEPT PHYS, BOX 248046, CORAL GABLES, FL 33124 USA. RI zachos, cosmas/C-4366-2014; Curtright, Thomas/B-6840-2015; OI zachos, cosmas/0000-0003-4379-3875; Curtright, Thomas/0000-0001-7031-5604 NR 29 TC 21 Z9 21 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0550-3213 EI 1873-1562 J9 NUCL PHYS B JI Nucl. Phys. B PD AUG 9 PY 1993 VL 402 IS 3 BP 604 EP 612 DI 10.1016/0550-3213(93)90120-E PG 9 WC Physics, Particles & Fields SC Physics GA LQ986 UT WOS:A1993LQ98600002 ER PT J AU GOCKSCH, A PISARSKI, RD AF GOCKSCH, A PISARSKI, RD TI PARTITION-FUNCTION FOR THE EIGENVALUES OF THE WILSON LINE SO NUCLEAR PHYSICS B LA English DT Article ID YANG-MILLS THEORIES; HAMILTONIAN LATTICE QCD; SU(N) GAUGE-THEORY; QUARK-GLUON GAS; FINITE-TEMPERATURE; SYMMETRY-BREAKING; INTERNAL SYMMETRY; PHASE-TRANSITION; TEMPORAL GAUGE; QUANTUM CHROMODYNAMICS AB In a gauge theory at nonzero temperature the eigenvalues of the Wilson line form a set of gauge invariant observables. By constructing the corresponding partition function for the phases of these eigenvalues, we prove that the trivial vacuum, where the phases vanish, is a minimum of the free energy. RP GOCKSCH, A (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 72 TC 36 Z9 36 U1 0 U2 1 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 AUG 9 PY 1993 VL 402 IS 3 BP 657 EP 668 DI 10.1016/0550-3213(93)90123-7 PG 12 WC Physics, Particles & Fields SC Physics GA LQ986 UT WOS:A1993LQ98600005 ER PT J AU FRABETTI, PL CHEUNG, HWK CUMALAT, JP DALLAPICCOLA, C GINKEL, JF GREENE, SV 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 BIANCO, S FABBRI, FL SARWAR, S ZALLO, A CULBERTSON, R GARDNER, RW GREENE, R WISS, J ALIMONTI, G BELLINI, G CACCIANIGA, B CINQUINI, L DICORATO, M GIAMMARCHI, M INZANI, P LEVERARO, F MALVEZZI, S MENASCE, D MERONI, E MORONI, L PEDRINI, D PERASSO, L SALA, A SALA, S TORRETTA, D VITTONE, M 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 DIAFERIA, R GIANINI, G RATTI, SP RICCARDI, C VITULO, P LOPEZ, A GRIM, GP PAOLONE, VS YAGER, PM WILSON, JR SHELDON, PD DAVENPORT, F FILASETTA, JF BLACKETT, GR PISHARODY, M HANDLER, T CHEON, BG KANG, JS KIM, KY AF FRABETTI, PL CHEUNG, HWK CUMALAT, JP DALLAPICCOLA, C GINKEL, JF GREENE, SV 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 BIANCO, S FABBRI, FL SARWAR, S ZALLO, A CULBERTSON, R GARDNER, RW GREENE, R WISS, J ALIMONTI, G BELLINI, G CACCIANIGA, B CINQUINI, L DICORATO, M GIAMMARCHI, M INZANI, P LEVERARO, F MALVEZZI, S MENASCE, D MERONI, E MORONI, L PEDRINI, D PERASSO, L SALA, A SALA, S TORRETTA, D VITTONE, M 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 DIAFERIA, R GIANINI, G RATTI, SP RICCARDI, C VITULO, P LOPEZ, A GRIM, GP PAOLONE, VS YAGER, PM WILSON, JR SHELDON, PD DAVENPORT, F FILASETTA, JF BLACKETT, GR PISHARODY, M HANDLER, T CHEON, BG KANG, JS KIM, KY TI PRECISE MEASUREMENT OF THE D(S)+/- MESON LIFETIME SO PHYSICAL REVIEW LETTERS LA English DT Article ID D0; D+; DS+ AB A precise measurement of the D(s)+/- meson lifetime is reported. The data were accumulated by the high energy photoproduction experiment E687 at Fermilab in the 1990-1991 fixed target run. The measurement has been done using 900 fully reconstructed D(s)+/- --> phipi+/- decays. The lifetime of the D(s)+/- meson is measured to be 0.475 +/- 0.020 +/- 0.007 ps. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. NATL INST NUCL PHYS,MILAN,ITALY. UNIV NOTRE DAME,NOTRE DAME,IN 46556. UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY. UNIV NOTRE DAME,NOTRE DAME,IN 46556. UNIV S CAROLINA,COLUMBIA,SC 29208. NO KENTUCKY UNIV,HIGHLAND HTS,KY 41076. UNIV TENNESSEE,KNOXVILLE,TN 37996. IST NAZL FIS NUCL,BOLOGNA,ITALY. UNIV COLORADO,BOULDER,CO 80309. UNIV ILLINOIS,URBANA,IL 61801. NORTHWESTERN UNIV,EVANSTON,IL 60208. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. IST NAZL FIS NUCL,I-27100 PAVIA,ITALY. UNIV PUERTO RICO,MAYAGUEZ,PR 00708. UNIV CALIF DAVIS,DAVIS,CA 95616. VANDERBILT UNIV,NASHVILLE,TN 37235. UNIV N CAROLINA,ASHEVILLE,NC 28804. KOREA UNIV,SEOUL 136701,SOUTH KOREA. RP FRABETTI, PL (reprint author), UNIV BOLOGNA,DIPARTIMENTO 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 8 TC 23 Z9 23 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 9 PY 1993 VL 71 IS 6 BP 827 EP 830 DI 10.1103/PhysRevLett.71.827 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ987 UT WOS:A1993LQ98700006 ER PT J AU ALSTONGARNJOST, M DOUGHERTY, BL KENNEY, RW TRIPP, RD KRIVICICH, JM NICHOLSON, HW SUTTON, CS DIETERLE, BD FOLTZ, SD LEAVITT, CP REEDER, RA BAKER, JD CAFFREY, AJ AF ALSTONGARNJOST, M DOUGHERTY, BL KENNEY, RW TRIPP, RD KRIVICICH, JM NICHOLSON, HW SUTTON, CS DIETERLE, BD FOLTZ, SD LEAVITT, CP REEDER, RA BAKER, JD CAFFREY, AJ TI EXPERIMENTAL SEARCH FOR NEUTRINOLESS DOUBLE-BETA-DECAY OF MO-100 SO PHYSICAL REVIEW LETTERS LA English DT Article AB No evidence for the neutrinoless double-beta decay of Mo-100 has been found in a search using a segmented Si(Li) detector with source foils enriched to 97% Mo-100. After 0.2664 mol yr of exposure, we report a 1 sigma lower limit on the half-life for the J(P) = 0+ --> 0+ transition of 0.44 x 10(23) yr. C1 MT HOLYOKE COLL,S HADLEY,MA 01075. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RP ALSTONGARNJOST, M (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Caffrey, Augustine/C-2005-2009 NR 15 TC 45 Z9 45 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 AUG 9 PY 1993 VL 71 IS 6 BP 831 EP 834 DI 10.1103/PhysRevLett.71.831 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ987 UT WOS:A1993LQ98700007 ER PT J AU JARZYNSKI, C AF JARZYNSKI, C TI MULTIPLE-TIME-SCALE APPROACH TO ERGODIC ADIABATIC SYSTEMS - ANOTHER LOOK SO PHYSICAL REVIEW LETTERS LA English DT Article ID INVARIANTS AB We reexamine the multiple-time-scale method as applied to ergodic adiabatic Hamiltonian systems. Solving for the evolution of the phase space density to first order in the slowness parameter, we find a term previously overlooked. The inclusion of this term resolves a standing discrepancy between the multiple-time-scale approach to this problem, and an approach using a Fokker-Planck equation. We apply our solution to the dynamics of a ''slow'' system coupled to an ensemble of ''fast'' systems following chaotic trajectories. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP JARZYNSKI, C (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA. RI Jarzynski, Christopher/B-4490-2009 OI Jarzynski, Christopher/0000-0002-3464-2920 NR 11 TC 28 Z9 28 U1 0 U2 7 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 9 PY 1993 VL 71 IS 6 BP 839 EP 842 DI 10.1103/PhysRevLett.71.839 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ987 UT WOS:A1993LQ98700009 ER PT J AU WROBLEWSKI, D SNIDER, RT AF WROBLEWSKI, D SNIDER, RT TI EVIDENCE OF THE COMPLETE MAGNETIC RECONNECTION DURING A SAWTOOTH COLLAPSE IN A TOKAMAK SO PHYSICAL REVIEW LETTERS LA English DT Article ID SAFETY-FACTOR PROFILE; DIII-D; OSCILLATIONS; DISCHARGES; STOCHASTICITY; POLARIZATION; MECHANISM; AXIS AB Statistical analysis of a large set of current profile data obtained for sawtoothing discharges in the DIII-D tokamak indicates that the safety factor (inverse rotational transform) in the plasma center, q0, is close to 1.0. The increase of qo associated with the sawtooth crash is found to be of the order of 0.05. The results of time resolved measurements of the current profile and the soft x-ray emissions support a model of the sawtooth instability based on total reconnection of the m = 1 magnetic island. C1 GEN ATOM,SAN DIEGO,CA 92186. RP WROBLEWSKI, D (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 26 TC 31 Z9 31 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 AUG 9 PY 1993 VL 71 IS 6 BP 859 EP 862 DI 10.1103/PhysRevLett.71.859 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ987 UT WOS:A1993LQ98700014 ER PT J AU MILLER, PA ROMERO, LA POCHAN, PD AF MILLER, PA ROMERO, LA POCHAN, PD TI SUBHARMONICS AND RF-PLASMA SHEATHS SO PHYSICAL REVIEW LETTERS LA English DT Article ID CHAOTIC BEHAVIOR; DISCHARGES; OSCILLATOR AB Period doubling and concomitant subharmonic generation have been reported in rf-excited plasmas. We show that this phenomenon is caused by the nonlinear interaction of the plasma-sheath capacitance with the external rf power circuits. As a result, changes in the external circuits can be used to control period doubling. Sheath capacitance can be derived from electrical measurements of period doubling. C1 GEOCENTERS INC,ALBUQUERQUE,NM 87106. RP MILLER, PA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 20 TC 22 Z9 22 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 AUG 9 PY 1993 VL 71 IS 6 BP 863 EP 866 DI 10.1103/PhysRevLett.71.863 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ987 UT WOS:A1993LQ98700015 ER PT J AU MASON, TE AEPPLI, G HAYDEN, SM RAMIREZ, AP MOOK, HA AF MASON, TE AEPPLI, G HAYDEN, SM RAMIREZ, AP MOOK, HA TI LOW-ENERGY EXCITATIONS IN SUPERCONDUCTING LA1.86SR0.14CUO4 SO PHYSICAL REVIEW LETTERS LA English DT Article ID SPIN DYNAMICS; YBA2CU3O7; SCATTERING; ELECTRONS; HEAT; TC AB We present magnetic neutron scattering and specific heat data on the high-T(c) superconductor La1.86Sr0.14CuO4. Even when the samples are superconducting and the magnetic response, chi'', is suppressed, there are excitations with energies well below 3.5k(B)T(c). The wave-vector dependence of chi'' is identical to that for the normal state, which implies that the low frequency excitations in our crystals are not those associated with the nodes of a clean d-wave superconductor. However, the data are consistent with gapless superconductivity induced by localized magnetic impurities, clearly observed in the specific heat measurements. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP MASON, TE (reprint author), RISO NATL LAB,DK-4000 ROSKILDE,DENMARK. RI Hayden, Stephen/F-4162-2011; Mason, Thomas/M-5809-2014 OI Hayden, Stephen/0000-0002-3209-027X; Mason, Thomas/0000-0003-1880-3971 NR 28 TC 201 Z9 201 U1 0 U2 9 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 AUG 9 PY 1993 VL 71 IS 6 BP 919 EP 922 DI 10.1103/PhysRevLett.71.919 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ987 UT WOS:A1993LQ98700029 ER PT J AU LLOYD, S AF LLOYD, S TI QUANTUM-MECHANICAL COMPUTERS AND UNCOMPUTABILITY SO PHYSICAL REVIEW LETTERS LA English DT Article ID TURING-MACHINES; COMPUTATION; MODELS AB The time evolution operator for any quantum-mechanical computer is diagonalizable, but to obtain the diagonal decomposition of a program state of the computer is as hard as actually performing the computation corresponding to the program. In particular, if a quantum-mechanical system is capable of universal computation, then the diagonal decomposition of program states is uncomputable. As a result, in a universe in which local variables support universal computation, a quantum-mechanical theory for that universe that supplies its spectrum cannot supply the spectral decomposition of the computational variables. A ''theory of everything'' can be simultaneously correct and fundamentally incomplete. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. RP LLOYD, S (reprint author), LOS ALAMOS NATL LAB,COMPLEX SYST GRP T13,LOS ALAMOS,NM 87545, USA. NR 16 TC 10 Z9 10 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 9 PY 1993 VL 71 IS 6 BP 943 EP 946 DI 10.1103/PhysRevLett.71.943 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ987 UT WOS:A1993LQ98700035 ER PT J AU BRYANT, PH AF BRYANT, PH TI EXTENSIONAL SINGULARITY DIMENSIONS FOR STRANGE ATTRACTORS SO PHYSICS LETTERS A LA English DT Article ID OBSERVED TIME-SERIES; GENERALIZED DIMENSIONS; CHAOTIC SIGNALS; SYSTEMS AB A new set of dimension-like invariants is obtained, which characterize aspects of the attractor not usually examined. This study also demonstrates a new method for determining Lyapunov exponents and introduces ''tailored attractors'' for which the Lyapunov exponents and fractal dimension may be precisely set. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 20 TC 1 Z9 1 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9601 J9 PHYS LETT A JI Phys. Lett. A PD AUG 9 PY 1993 VL 179 IS 3 BP 186 EP 190 DI 10.1016/0375-9601(93)91136-S PG 5 WC Physics, Multidisciplinary SC Physics GA LT235 UT WOS:A1993LT23500006 ER PT J AU MCCORMACK, EF PRATT, ST DEHMER, PM DEHMER, JL AF MCCORMACK, EF PRATT, ST DEHMER, PM DEHMER, JL TI DOUBLE-RESONANCE LASER-INDUCED GRATING SPECTROSCOPY OF NITRIC-OXIDE SO CHEMICAL PHYSICS LETTERS LA English DT Article ID DEGENERATE; EMISSION; SYSTEMS AB Double-resonance laser-induced grating spectroscopy (LIGS), including two-color laser-induced grating spectroscopy (TC-LIGS) and degenerate four-wave mixing (DFWM) spectroscopy, has been used to probe the E 2SIGMA, nu = 0 <-- A 2SIGMA, nu' = 0 <-- X 2PI1/2, nu'' = 0 double-resonance transitions in NO. Several different double-resonance schemes have been implemented and their relative merits are discussed. The results demonstrate that double-resonance LIGS shows considerable promise for obtaining state-selective absorption spectra of rovibronically excited states for a wide variety of molecules. RP MCCORMACK, EF (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 19 TC 32 Z9 32 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0009-2614 J9 CHEM PHYS LETT JI Chem. Phys. Lett. PD AUG 6 PY 1993 VL 211 IS 1 BP 147 EP 155 DI 10.1016/0009-2614(93)80064-V PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LQ146 UT WOS:A1993LQ14600023 ER PT J AU OLAH, GA TRAKHANOV, S TREWHELLA, J QUIOCHO, FA AF OLAH, GA TRAKHANOV, S TREWHELLA, J QUIOCHO, FA TI LEUCINE ISOLEUCINE VALINE-BINDING PROTEIN CONTRACTS UPON BINDING OF LIGAND SO JOURNAL OF BIOLOGICAL CHEMISTRY LA English DT Article ID X-RAY-SCATTERING; RESOLUTION STRUCTURE; NEUTRON-SCATTERING; ACTIVE-TRANSPORT; SALMONELLA-TYPHIMURIUM; CONFORMATIONAL CHANGE; BACTERIAL TRANSPORT; YEAST HEXOKINASE; ESCHERICHIA-COLI; HYDROGEN-BONDS AB Small-angle x-ray scattering and computer modeling have been used to study the effects of ligand binding to the leucine/isoleucine/valine-binding protein, an initial component of the high-affinity active transport system for branched-chain aliphatic amino acids in Escherichia coli. Measurements were made with no ligand present and with either L-leucine or L-valine present. Upon binding of either leucine or valine, there is a decrease in the radius of gyration, from 23.2 +/- 0.2 to 22.2 +/- 0.2 angstrom and in the maximum particle dimension, from 82 +/- 3 to 73 +/- 3 angstrom. The x-ray structure of the unbound form has been determined and gives a radius of gyration and a maximum dimension consistent with the values found for the solution structure in this study (Sack, J. S., Saper, M. A., and Quiocho, F. A. (1989) J. Mol. Biol. 206,171-191). The reduction in the radius of gyration and maximum dimension upon ligand binding can be accounted for by a substrate-induced cleft closure in a combined ''hinge-twist'' motion. Modeling of the substrate-bound state was done by comparison of this protein with another periplasmic binding protein (L-arabinose-binding protein), which possesses a similar two-lobe structure and for which the x-ray structure is known in its ligand-bound form. C1 HOWARD HUGHES MED INST,HOUSTON,TX 77030. RP OLAH, GA (reprint author), LOS ALAMOS NATL LAB,DIV ISOTOPE & NUCL CHEM,LOS ALAMOS,NM 87545, USA. OI Trewhella, Jill/0000-0002-8555-6766 NR 39 TC 52 Z9 52 U1 0 U2 3 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 AUG 5 PY 1993 VL 268 IS 22 BP 16241 EP 16247 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA LQ336 UT WOS:A1993LQ33600025 PM 8344909 ER PT J AU MASTRANGELO, IA HELD, PG DAILEY, L WALL, JS HOUGH, PVC HEINTZ, N HEINTZ, NH AF MASTRANGELO, IA HELD, PG DAILEY, L WALL, JS HOUGH, PVC HEINTZ, N HEINTZ, NH TI RIP60 DIMERS AND MULTIPLES OF DIMERS ASSEMBLE LINK STRUCTURES AT AN ORIGIN OF BIDIRECTIONAL REPLICATION IN THE DIHYDROFOLATE-REDUCTASE AMPLICON OF CHINESE-HAMSTER OVARY CELLS SO JOURNAL OF MOLECULAR BIOLOGY LA English DT Article DE RIP60 DIMERS; STEM MASS MEASUREMENT; TWISTED DNA LOOPS; COMPACTED DNA LOOPS; 5'-ATT-3'REPEATS ID BARR NUCLEAR ANTIGEN-1; DNA-REPLICATION; SUPERCOILED DNA; BINDING PROTEIN; T-ANTIGEN; COOPERATIVE BINDING; INITIATION REGION; RNA-POLYMERASE; CHO CELLS; SITES C1 UNIV VERMONT,COLL MED,DEPT PATHOL,BURLINGTON,VT 05405. ROCKEFELLER UNIV,MOLEC BIOL LAB,NEW YORK,NY 10021. ROCKEFELLER UNIV,HOWARD HUGHES MED INST,NEW YORK,NY 10021. RP MASTRANGELO, IA (reprint author), BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973, USA. NR 56 TC 11 Z9 12 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 AUG 5 PY 1993 VL 232 IS 3 BP 766 EP 778 DI 10.1006/jmbi.1993.1430 PG 13 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA LU218 UT WOS:A1993LU21800007 PM 8355269 ER PT J AU FLYNN, GW WESTON, RE AF FLYNN, GW WESTON, RE TI DIODE-LASER STUDIES OF COLLISIONAL ENERGY-TRANSFER SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Review ID HOT HYDROGEN-ATOMS; HIGHLY EXCITED NO2; ENHANCED VIBRATIONAL DEACTIVATION; CHEMICALLY SIGNIFICANT AMOUNTS; PRODUCT STATE DISTRIBUTION; POLYATOMIC-MOLECULES; CARBON-DIOXIDE; 193 NM; ROTATIONAL DISTRIBUTIONS; PHOTOINITIATED REACTIONS AB Time-resolved infrared diode laser absorption spectroscopy has proven to be a remarkably sensitive probe for the study of collisional energy transfer processes. The high spectral resolution makes it possible to determine the rovibrational states, as well as the translational energy content, of small molecules excited in collisions. We illustrate this technique with studies of ''hot'' atom collisions and show that in the case of H + CO2 encounters the experimental results can be explained by a simple ''breathing ellipsoid'' model. Recently, we applied diode laser spectroscopy to studies of collisional energy transfer from highly vibrationally excited molecules, containing chemically interesting amounts of energy. Our results indicate that most of the energy loss from the donor molecule results in rotational and translational, rather than vibrational, excitation of the ''bath'' gas species. The small number of collision events which lead to vibrational excitation of the bath molecule states appears to be dominated by long-range forces in which donor vibrational energy is exchanged for acceptor vibrational energy with little or no excitation of the rotational and translational degrees of freedom. C1 COLUMBIA UNIV, COLUMBIA RADIAT LAB, NEW YORK, NY 10027 USA. BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP COLUMBIA UNIV, DEPT CHEM, NEW YORK, NY 10027 USA. NR 133 TC 47 Z9 47 U1 0 U2 5 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 AUG 5 PY 1993 VL 97 IS 31 BP 8116 EP 8127 DI 10.1021/j100133a003 PG 12 WC Chemistry, Physical SC Chemistry GA LW904 UT WOS:A1993LW90400003 ER PT J AU SCHUTZ, C HOLINDE, K SPETH, J JOHNSON, MB AF SCHUTZ, C HOLINDE, K SPETH, J JOHNSON, MB TI S-WAVE PION OPTICAL-POTENTIAL FROM MEDIUM-MODIFIED PI-PI-SCATTERING AMPLITUDE SO PHYSICS LETTERS B LA English DT Article ID LOW-ENERGY PIONS; MESON AB We show that a recent model of medium modifications of the pipi scattering amplitude leads to a new source of repulsion in the S-wave pion optical potential, which existing models are unable to explain. our result indicates that pions do not condense through S-wave interactions. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP SCHUTZ, C (reprint author), FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM, INST KERNPHYS THEORIE, W-5170 JULICH 1, GERMANY. NR 21 TC 4 Z9 4 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 AUG 5 PY 1993 VL 312 IS 1-2 BP 18 EP 23 DI 10.1016/0370-2693(93)90479-2 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LR033 UT WOS:A1993LR03300004 ER PT J AU RANDALL, L SUNDRUM, R AF RANDALL, L SUNDRUM, R TI B-]S-GAMMA AND B(S)-]MU(+)MU(-) IN EXTENDED TECHNICOLOR MODELS SO PHYSICS LETTERS B LA English DT Article ID CHANGING NEUTRAL CURRENTS; CHARGED-HIGGS-BOSON; BBAR-MESON DECAY; RADIATIVE-CORRECTIONS; B-DECAYS; ELECTROWEAK PARAMETERS; 2-HIGGS-DOUBLET MODEL; CHIRAL HIERARCHIES; SYMMETRY-BREAKING; WEAK AB The rates of the rare flavor-changing processes, b --> sgamma and B(s) --> mu + mu- are estimated in extended technicolor models with and without a GIM mechanism. We find the b --> sgamma rate in ETC models with a GIM mechanism to be at most slightly larger than the standard model rate, whereas there is no significant extra model-independent contribution in other ETC scenarios. In the case of B(s) --> mu+ mu-, ETC models with a GIM mechanism can yield a rate up to two orders of magnitude bigger than that of the standard model, whereas generic ETC scenarios are likely to give a rate which is about an order of magnitude bigger than that of the standard model. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP RANDALL, L (reprint author), MIT,CAMBRIDGE,MA 02139, USA. NR 63 TC 29 Z9 29 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 AUG 5 PY 1993 VL 312 IS 1-2 BP 148 EP 154 DI 10.1016/0370-2693(93)90503-A PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LR033 UT WOS:A1993LR03300028 ER PT J AU LUTY, MA SUNDRUM, R AF LUTY, MA SUNDRUM, R TI QUARKONIUM DECAYS AND LIGHT-QUARK MASSES SO PHYSICS LETTERS B LA English DT Article ID HADRONIC TRANSITIONS; RATIOS; STATES AB The SU(3)-violating decays PHI2S-->PHI1S X, where X = pi0 or eta and PHI = J/psi or UPSILON have been recently proposed as a means of probing the light quark masses beyond leading order in chiral perturbation theory. We argue that this analysis is incorrect, even in the heavy quark limit. We show that these decays are governed by an infinite number of matrix elements which are not suppressed by any small parameter, and which cannot be computed with our present understanding of QCD. Furthermore, for sufficiently heavy quarks, we show that the decay amplitudes can be organized into a twist expansion, and that the contributions considered in the above proposal are subleading in this expansion. We also explain how these decays nonetheless give a constraint on the light quark masses valid at leading order in the chiral expansion. The decays PHI1S --> etagamma and PHI2S --> PHI1S pipi also have contributions from infinitely many operators, contrary to claims in the literature. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP LUTY, MA (reprint author), LAWRENCE BERKELEY LAB,THEORET PHYS GRP,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 12 TC 6 Z9 6 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 AUG 5 PY 1993 VL 312 IS 1-2 BP 205 EP 210 DI 10.1016/0370-2693(93)90511-F PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LR033 UT WOS:A1993LR03300036 ER PT J AU LU, HJ BRODSKY, SJ KHOZE, VA AF LU, HJ BRODSKY, SJ KHOZE, VA TI QED-INDUCED RAPIDITY-GAP EVENTS AT THE Z PEAK SO PHYSICS LETTERS B LA English DT Article ID E+E ANNIHILATION; PHYSICS AB We study rapidity-pp events in e+e- annihilation at the Z boson peak initiated by the emission of a virtual photon. This mechanism is suppressed by the QED coupling constant, but it is enhanced due to a large propagator term from the virtual photon. For typical kinematics, we find a smaller event rate than analogous QCD type gap events. In the small jet-pair invariant mass limit, the QED type events follow a 1 + cos2theta distribution in the jet-pair scattering angle, instead of the sin2theta distribution of the QCD case. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. UNIV DURHAM,DEPT PHYS,DURHAM DH1 3LE,ENGLAND. RP LU, HJ (reprint author), UNIV MARYLAND,DEPT PHYS,COLL PK,MD 20742, USA. NR 17 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 5 PY 1993 VL 312 IS 1-2 BP 215 EP 219 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LR033 UT WOS:A1993LR03300038 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FALALEEV, V FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TRIELLE, D TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J AF ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, S ALVSVAAG, SJ AMALDI, U ANDREAZZA, A ANTILOGUS, P APEL, WD APSIMON, RJ ARNOUD, Y ASMAN, B AUGUSTIN, JE AUGUSTINUS, A BAILLON, P BAMBADE, P BARAO, F BARATE, R BARBIELLINI, G BARDIN, DY BARKER, GJ BARONCELLI, A BARRING, O BARRIO, JA BARTL, W BATES, MJ BATTAGLIA, M BAUBILLIER, M BECKS, KH BEESTON, CJ BEGALLI, M BEILLIERE, P BELOKOPYTOV, Y BELTRAN, P BENEDIC, D BENVENUTI, AC BERGGREN, M BERTRAND, D BIANCHI, F BILENKY, MS BILLOIR, P BJARNE, J BLOCH, D BLYTH, S BOCCI, V BOGOLUBOV, PN BOLOGNESE, T BONESINI, M BONIVENTO, W BOOTH, PSL BORISOV, G BORNER, H BOSIO, C BOSTJANCIC, B BOSWORTH, S BOTNER, O BOUQUET, B BOURDARIOS, C BOWCOCK, TJV BOZZO, M BRAIBANT, S BRANCHINI, P BRAND, KD BRENNER, RA BRIAND, H BRICMAN, C BROWN, RCA BRUMMER, N BRUNET, JM BUGGE, L BURAN, T BURMEISTER, H BUYTAERT, JAMA CACCIA, M CALVI, M ROZAS, AJC CAMPION, R CAMPORESI, T CANALE, V CAO, F CARENA, F CARROLL, L CASO, C GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHARPENTIER, P CHAUSSARD, L CHAUVEAU, J CHECCHIA, P CHELKOV, GA CHEVALIER, L CHLIAPNIKOV, P CHOROWICZ, V CHRIN, JTM COLLINS, P CONTRERAS, JL CONTRI, R CORTINA, E COSME, G COUCHOT, F CRAWLEY, HB CRENNELL, D CROSETTI, G CROZON, M MAESTRO, JC CZELLAR, S DAHLJENSEN, E DALMAGNE, B DAM, M DAMGAARD, G DAUBIE, E DAUM, A DAUNCEY, PD DAVENPORT, M DAVID, P DAVIES, J DASILVA, W DEFOIX, C DELPIERRE, P DEMARIA, N DEANGELIS, A DEBOECK, H DEBOER, W DECLERCQ, C LASO, MDMD DEGROOT, N DELAVAISSIERE, C DELOTTO, B DEMIN, A DIJKSTRA, H DICIACCIO, L DOLBEAU, J DONSZELMANN, M DOROBA, K DRACOS, M DREES, J DRIS, M DUFOUR, Y DUPONT, F EDSALL, D EEK, LO EEROLA, PAM EHRET, R EKELOF, T EKSPONG, G PEISERT, AE ENGEL, JP ERSHAIDAT, N FALALEEV, V FASSOULIOTIS, D FEINDT, M ALONSO, MF FERRER, A FILIPPAS, TA FIRESTONE, A FOETH, H FOKITIS, E FONTANELLI, F FORBES, KAJ FOUSSET, JL FRANCON, S FRANEK, B FRENKIEL, P FRIES, DC FRODESEN, AG FRUHWIRTH, R FULDAQUENZER, F FURNIVAL, K FURSTENAU, H FUSTER, J GAMBA, D GARCIA, C GARCIA, J GASPAR, C GASPARINI, U GAVILLET, P GAZIS, EN GERBER, JP GIACOMELLI, P GOKIELI, R GOLOB, B GOLOVATYUK, VM CADENAS, JJGY GOPAL, G GORN, L GORSKI, M GRACCO, V GRANT, A GRARD, F GRAZIANI, E GROSDIDIER, G GROSS, E GROSSEWIESMANN, P GROSSETETE, B GUY, J HAEDINGER, U HAHN, F HAHN, M HAIDER, S HAKANSSON, A HALLGREN, A HAMACHER, K DEMONCHENAULT, GH HAO, W HARRIS, FJ HEDBERG, V HENKES, T HERNANDEZ, JJ HERQUET, P HERR, H HESSING, TL HIETANEN, I HIGGINS, CO HIGON, E HILKE, HJ HODGSON, SD HOFMOKL, T HOLMGREN, SO HOLTHUIZEN, D HONORE, PF HOOPER, JE HOULDEN, M HRUBEC, J HUET, K HULTH, PO HULTQVIST, K IOANNOU, P IVERSEN, PS JACKSON, JN JALOCHA, P JARLSKOG, G JARRY, P JEANMARIE, B JOHANSSON, EK JOHNSON, D JONKER, M JONSSON, L JUILLOT, P KALKANIS, G KALMUS, G KAPUSTA, F KARLSSON, M KARVELAS, E KATSANEVAS, S KATSOUFIS, EC KERANEN, R KESTEMAN, J KHOMENKO, BA KHOVANSKI, NN KING, B KJAER, NJ KLEIN, H KLOVNING, A KLUIT, P KOCHMEHRIN, A KOEHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KREUTER, C KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KRUPINSKI, W KULKA, K KURVINEN, K LACASTA, C LAMBROPOULOS, C LAMSA, JW LANCERI, L LAPIN, V LAUGIER, JP LAUHAKANGAS, R LEDER, G LEDROIT, F LEITNER, R LEMOIGNE, Y LEMONNE, J LENZEN, G LEPELTIER, V LESIAK, T LEVY, JM LIEB, E LIKO, D LINDGREN, J LINDNER, R LIPNIACKA, A LIPPI, I LOERSTAD, B LOKAJICEK, M LOKEN, JG LOPEZFERNANDEZ, A AGUERA, MAL LOS, M LOUKAS, D LOZANO, JJ LUTZ, P LYONS, L MAEHLUM, G MAILLARD, J MAIO, A MALTEZOS, A MANDL, F MARCO, J MARGONI, M MARIN, JC MARKOU, A MARON, T MARTI, S MATORRAS, F MATTEUZZI, C MATTHIAE, G MAZZUCATO, M MCCUBBIN, M MCKAY, R MCNULTY, R MEOLA, G MERONI, C MEYER, WT MICHELOTTO, M MIKULEC, I MIRABITO, L MITAROFF, WA MITSELMAKHER, GV MJOERNMARK, U MOA, T MOELLER, R MOENIG, K MONGE, MR MORETTINI, P MUELLER, H MURRAY, WJ MURYN, B MYATT, G NAVARRIA, FL NEGRI, P NICOLAIDOU, R NIELSEN, BS NIJJHAR, B NIKOLAENKO, V NILSEN, PES NISS, P NOMEROTSKI, A OBRAZTSOV, V OLSHEVSKI, AG ORAVA, R OSTANKOV, A OSTERBERG, K OURAOU, A PAGANONI, M PAIN, R PALKA, H PAPADOPOULOU, TD PAPE, L PARODI, F PASSERI, A PEGORARO, M PENNANEN, J PERALTA, L PERNEGGER, H PERNICKA, M PERROTTA, A PETRIDOU, C PETROLINI, A PIERRE, F PIMENTA, M PINGOT, O PLASZCZYNSKI, S PODOBRIN, O POL, ME POLOK, G POROPAT, P POZDNIAKOV, V PRIVITERA, P PULLIA, A RADOJICIC, D RAGAZZI, S RAHMANI, H RATOFF, PN READ, AL REBECCHI, P REDAELLI, NG REGLER, M REID, D RENTON, PB RESVANIS, LK RICHARD, F RICHARDSON, M RIDKY, J RINAUDO, G RODITI, I ROMERO, A RONCAGLIOLO, I RONCHESE, P RONNQVIST, C ROSENBERG, EI ROSSI, S ROSSO, E ROUDEAU, P ROVELLI, T RUCKSTUHL, W RUHLMANNKLEIDER, V RUIZ, A RYBICKI, K SAARIKKO, H SACQUIN, Y SAJOT, G SALT, J SANCHEZ, J SANNINO, M SCHAEL, S SCHNEIDER, H SCHYNS, MAE SCIOLLA, G SCURI, F SEGAR, AM SEITZ, A SEKULIN, R SESSA, M SEUFERT, R SHELLARD, RC SICCAMA, I SIEGRIST, P SIMONETTI, S SIMONETTO, F SISAKIAN, AN SKJEVLING, G SMADJA, G SMIRNOV, N SMIRNOVA, O SMITH, GR SOSNOWSKI, R SOUZASANTOS, D SPASSOFF, TS SPIRITI, E SQUARCIA, S STAECK, H STANESCU, C STAPNES, S STAVROPOULOS, G STICHELBAUT, F STOCCHI, A STRAUSS, J STRAVER, J STRUB, R STUGU, B SZCZEKOWSKI, M SZEPTYCKA, M SZYMANSKI, P TABARELLI, T TCHIKILEV, O THEODOSIOU, GE TILQUIN, A TIMMERMANS, J TIMOFEEV, VG TKATCHEV, LG TODOROV, T TOET, DZ TOKER, O TOME, B TORASSA, E TORTORA, L TRIELLE, D TRISCHUK, W TRISTRAM, G TRONCON, C TSIROU, A TSYGANOV, EN TURALA, M TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E FERRER, JAV VANDERVELDE, C VANAPELDOORN, GW VANDAM, P VANDERHEIJDEN, M VANDONINCK, WK VAZ, P VEGNI, G VENTURA, L VENUS, W VERBEURE, F VERLATO, M VERTOGRADOV, LS VILANOVA, D VINCENT, P VITALE, L VLASOV, E VODOPYANOV, AS VOLLMER, M VOUTILAINEN, M VRBA, V WAHLEN, H WALCK, C WALDNER, F WEHR, A WEIERSTALL, M WEILHAMMER, P WERNER, J WETHERELL, AM WICKENS, JH WILKINSON, GR WILLIAMS, WSC WINTER, M WITEK, M WORMSER, G WOSCHNAGG, K YAMDAGNI, N YEPES, P ZAITSEV, A ZALEWSKA, A ZALEWSKI, P ZAVRTANIK, D ZEVGOLATAKOS, E ZHANG, G ZIMIN, NI ZITO, M ZUBERI, R FUNCHAL, RZ ZUMERLE, G ZUNIGA, J TI A MEASUREMENT OF THE MEAN LIFETIMES OF CHARGED AND NEUTRAL B-HADRONS SO PHYSICS LETTERS B LA English DT Article ID LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS AB The decays of B-hadrons have been reconstructed using the charged particles recorded in the DELPHI silicon microstrip detector. The sum of the charges of the secondaries determines the charge of the B-hadron parent. Some 232 114 multihadronic Z0 decays recorded during the 1991 run of LEP at centre-of-mass energies between 88.2 GeV and 94.2 GeV yield 253 B-hadron candidates with well-measured charge. From these the mean lifetimes of neutral and charged B-hadrons are found to be 1.44 +/- 0.21(stat.) +/- 0.14(syst.) ps and 1.56 +/- 0.19(stat.) +/- 0.13(syst.) ps respectively. The ratio of their lifetimes is 1.09(-0.23)+0.28 (Stat.) +/- 0.11 (syst.). Under some assumptions on the abundance and lifetime of the LAMBDA(b)0 and B(s)0 states, the B0 and B+ lifetimes are inferred. C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA. UNIV INSTELLING ANTWERPEN, DEPT PHYS, B-2610 WILRIJK, BELGIUM. UUB, ULB, IIHE, B-1050 BRUSSELS, BELGIUM. UNIV ETAT MONS, FAC SCI, B-7000 MONS, BELGIUM. UNIV ATHENS, PHYS LAB, GR-10680 ATHENS, GREECE. UNIV BERGEN, DEPT PHYS, B-5007 BERGEN, BELGIUM. UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY. INFN, I-40126 BOLOGNA, ITALY. COLL FRANCE, IN2P3, PHYS CORPUSCULAIRE LAB, CNRS, F-75231 PARIS 05, FRANCE. CERN, CH-1211 GENEVA 23, SWITZERLAND. ULP, IN2P3, CTR RECH NUCL, CNRS, F-67037 STRASBOURG, FRANCE. NCSR DEMOKRITOS, INST NUCL PHYS, GR-15310 ATHENS, GREECE. CAS, INST PHYS, FZU, DIV HIGH ENERGY PHYS, CS-18040 PRAGUE 8, CZECHOSLOVAKIA. UNIV GENOA, DIPARTIMENTO FIS, I-16146 GENOA, ITALY. INFN, I-16146 GENOA, ITALY. UNIV GRENOBLE 1, INST SCI NUCL, CNRS, IN2P3, F-38026 ST MARTIN DHERES, FRANCE. SEFT, HIGH ENERGY PHYS RES INST, SF-00170 HELSINKI, FINLAND. JOINT INST NUCL RES, MOSCOW 101000, RUSSIA. UNIV KARLSRUHE, INST EXPTL KERNPHYS, W-7500 KARLSRUHE 1, GERMANY. INST NUCL PHYS, HIGH ENERGY, PHYS LAB, PL-30055 KRAKOW 30, POLAND. CTR BRASILEIRO PESQUISAS FIS, BR-22290 RIO DE JANEIRO, BRAZIL. UNIV PARIS 11, ACCELERATEUR LINEAIRE LAB, CNRS, IN2P3, F-91405 ORSAY, FRANCE. UNIV LANCASTER, SCH PHYS & MAT, LANCASTER LA1 4YB, ENGLAND. UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, ENGLAND. UNIV PARIS 06 & 7, LPHNE, CNRS, IN2P3, F-75252 PARIS 05, FRANCE. LUND UNIV, DEPT PHYS, S-22363 LUND, SWEDEN. UNIV LYON 1, IPNL, CNRS, IN2P3, F-69622 VILLEURBANNE, FRANCE. UNIV COMPLUTENSE MADRID, E-28040 MADRID, SPAIN. UNIV AIX MARSEILLE 2, CPP, CNRS, IN2P3, F-69622 VILLEURBANNE, FRANCE. UNIV MILAN, DIPARTIMENTO FIS, I-20133 MILAN, ITALY. INFN, I-20133 MILAN, ITALY. NIELS BOHR INST, DK-2100 COPENHAGEN 0, DENMARK. CHARLES UNIV, NC, NUCL CTR MFF, CS-18000 PRAGUE 8, CZECHOSLOVAKIA. NATL INST NUCL PHYS & HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS. NATL TECH UNIV ATHENS, DEPT PHYS, GR-15773 ATHENS, GREECE. UNIV OSLO, DEPT PHYS, N-1000 OSLO 3, NORWAY. UNIV OVIEDO, DEPT FIS, E-33006 OVIEDO, SPAIN. UNIV OXFORD, DEPT PHYS, OXFORD OX1 3RH, ENGLAND. UNIV PADUA, DIPARTIMENTO FIS, I-35131 PADUA, ITALY. INFN, I-35131 PADUA, ITALY. PONTIFICIA UNIV CATOLICA, DEPT FIS, BR-22453 RIO DE JANEIRO, BRAZIL. RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND. UNIV ROMA TOR VERGATA, DIPARTIMENTO FIS, I-00173 ROME, ITALY. INFN, I-00173 ROME, ITALY. CTR ETUD SACLAY, DAPNIA, DSM, F-91191 GIF SUR YVETTE, FRANCE. UNIV SALERNO, DIPARTIMENTO FIS, I-84100 SALERNO, ITALY. INFN, IST SUPER SANITA, I-00161 ROME, ITALY. UNIV CANTABRIA, CSIC, CEAFM, E-39006 SANTANDER, SPAIN. MOSCOW HIGH ENERGY PHYS INST, MOSCOW, RUSSIA. UNIV LJUBLJANA, J STEFAN INST, LJUBLJANA 61000, SLOVENIA. UNIV LJUBLJANA, DEPT PHYS, LJUBLJANA 61000, SLOVENIA. UNIV STOCKHOLM, FYSIKUM, S-11385 STOCKHOLM, SWEDEN. UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY. INFN, I-10125 TURIN, ITALY. UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY. UNIV UDINE, IST FIS, I-33100 UDINE, ITALY. UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN. CSIC, IFIC, E-46100 BURJASSOT, SPAIN. UNIV VALENCIA, DFAMN, E-46100 BURJASSOT, SPAIN. AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA. INST NUCL STUDIES, PL-00681 WARSAW, POLAND. UNIV WARSAW, PL-00681 WARSAW, POLAND. UNIV GESAMTHSCH WUPPERTAL, FACHBEREICH PHYS, W-5600 WUPPERTAL 1, GERMANY. RP ABREU, P (reprint author), FCUL, IST, LIP, AU GLIAS GARCIA 14 LO, P-1000 LISBON, PORTUGAL. RI Hallgren, Allan/A-8963-2013; Botner, Olga/A-9110-2013; Zalewski, Piotr/H-7335-2013; Marti-Garcia, Salvador/F-3085-2011; Vaz, Pedro/K-2464-2013; Monge, Maria Roberta/G-9127-2012; Ridky, Jan/H-6184-2014; Zukanovich Funchal, Renata/C-5829-2013; Tome, Bernardo/J-4410-2013; Fernandez, Ester/K-9734-2014; Pimenta, Mario/M-1741-2013; Gomez Cadenas, Juan Jose/L-2003-2014; Giacomelli, Paolo/B-8076-2009; Fruhwirth, Rudolf/H-2529-2012; Andreazza, Attilio/E-5642-2011; Verlato, Marco/J-4604-2012; Dracos, Marcos/K-2335-2012; de Groot, Nicolo/A-2675-2009; Nomerotski, Andrei/A-5169-2010; Katsanevas, Stavros/A-4297-2011; Ruiz, Alberto/E-4473-2011; branchini, paolo/A-4857-2011; Shellard, Ronald/G-4825-2012; Petrolini, Alessandro/H-3782-2011; Torassa, Ezio/I-1788-2012; Contreras Gonzalez, Jose Luis/K-7255-2014; Hernandez-Rey, Juan Jose/N-5955-2014; Abreu, Pedro/L-2220-2014; Barao, Fernando/O-2357-2016; Barrio, Juan/L-3227-2014; Ragazzi, Stefano/D-2463-2009; Roditi, Itzhak/O-7448-2014; Zuniga, Juan/P-4385-2014; Michelotto, Michele/A-9571-2013; Matorras, Francisco/I-4983-2015; Ferrer, Antonio/H-2942-2015; Rovelli, Tiziano/K-4432-2015; Smirnova, Oxana/A-4401-2013; Fernandez-Alonso, Mercedes/F-2557-2016; Lozano-Bahilo, Julio/F-4881-2016; Olshevskiy, Alexander/I-1580-2016; Paganoni, Marco/A-4235-2016; OI Vaz, Pedro/0000-0002-7186-2359; Monge, Maria Roberta/0000-0003-1633-3195; Ridky, Jan/0000-0001-6697-1393; Zukanovich Funchal, Renata/0000-0001-6749-0022; Tome, Bernardo/0000-0002-7564-8392; Pimenta, Mario/0000-0002-2590-0908; Gomez Cadenas, Juan Jose/0000-0002-8224-7714; Andreazza, Attilio/0000-0001-5161-5759; Verlato, Marco/0000-0003-1967-7655; Dracos, Marcos/0000-0003-0514-193X; Ruiz, Alberto/0000-0002-3639-0368; Shellard, Ronald/0000-0002-2983-1815; Petrolini, Alessandro/0000-0003-0222-7594; Contreras Gonzalez, Jose Luis/0000-0001-7282-2394; Hernandez-Rey, Juan Jose/0000-0002-1527-7200; Abreu, Pedro/0000-0002-9973-7314; Barao, Fernando/0000-0002-8346-9941; Barrio, Juan/0000-0002-0965-0259; Matteuzzi, Clara/0000-0002-4047-4521; DE MIN, ALBERTO/0000-0002-8130-9389; Ragazzi, Stefano/0000-0001-8219-2074; Roditi, Itzhak/0000-0003-2363-5626; Zuniga, Juan/0000-0002-1041-6451; Michelotto, Michele/0000-0001-6644-987X; Matorras, Francisco/0000-0003-4295-5668; Ferrer, Antonio/0000-0003-0532-711X; Rovelli, Tiziano/0000-0002-9746-4842; Smirnova, Oxana/0000-0003-2517-531X; Fernandez-Alonso, Mercedes/0000-0002-1311-5275; Lozano-Bahilo, Julio/0000-0003-0613-140X; Olshevskiy, Alexander/0000-0002-8902-1793; Paganoni, Marco/0000-0003-2461-275X; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; Maio, Amelia/0000-0001-9099-0009; De Angelis, Alessandro/0000-0002-3288-2517; De Lotto, Barbara/0000-0003-3624-4480; Tabarelli de Fatis, Tommaso/0000-0001-6262-4685; Lacasta, Carlos/0000-0002-2623-6252; Torassa, Ezio/0000-0003-2321-0599 NR 18 TC 20 Z9 20 U1 0 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 5 PY 1993 VL 312 IS 1-2 BP 253 EP 266 DI 10.1016/0370-2693(93)90520-R PG 14 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LR033 UT WOS:A1993LR03300045 ER PT J AU GULOY, AM CORBETT, JD AF GULOY, AM CORBETT, JD TI THE LANTHANUM-GERMANIUM SYSTEM - 19 ISOSTRUCTURAL INTERSTITIAL COMPOUNDS OF THE LA5GE3 HOST SO INORGANIC CHEMISTRY LA English DT Article ID POLAR INTERMETALLIC COMPOUNDS; CHEMISTRY; PHASES; METALS; ZR5SB3 AB Sintering reactions in sealed Ta containers afford single-phase interstitial derivatives La5Ge3Z of the line compound La5Ge3 (Mn5Si3 type) for Z = B(x), C(x), N, O, P, S, Cl, As, Se, Sb, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ru, and Cd. Guinier X-ray techniques were not sufficiently sensitive to discern the exact stoichiometries of the boron and carbon examples, but x probably falls in the ranges 0.7 +/- 0.1 and 0.7-1.0, respectively. The lattice dimensions and relative inertness previously reported for some La5Ge3 samples appear to be those of La5Ge3O, including for the germaniothermal synthesis from La2O3 and Ge. Single crystal X-my studies were carried out for La5Ge3 and La5Ge3Cr (P6(3)/mcm, Z = 2, a = 8.941 (1), 9.004 (1) angstrom, c = 6.878 (1), 7.105 (1) angstrom, R/R(w) = 3.4/3.8, 2.4/2.9%, respectively). The short La-Cr distance in the latter, 2.801 (1) angstrom, is distinctive. Cell volumes increase on Z insertion into La5Ge3 for all but N and O. The changes within the Zn-Se series of Z are markedly greater than in electron-richer zirconium host analogues. La5Ge3 is Pauli-paramagnetic and metallic, while LasGe3P is a diamagnetic semiconductor (Zintl phase) appropriate to the presence of just three excess (conduction) electrons in the La5Ge3 host. Extended-Huckel band calculation results for La5Ge3 and La5Ge3P are consistent with these properties. Valence and conduction band overlap that is present in La5Ge3 through strong La-Ge bonding and large band dispersions is removed on oxidation with P. Calculations for the more electropositive Fe interstitial place the unsplit Fe d levels near E(F), with Fe 4s providing much of the binding. La3Ge has a Ti3P-type structure. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 55 TC 50 Z9 50 U1 1 U2 9 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0020-1669 J9 INORG CHEM JI Inorg. Chem. PD AUG 4 PY 1993 VL 32 IS 16 BP 3532 EP 3540 DI 10.1021/ic00068a025 PG 9 WC Chemistry, Inorganic & Nuclear SC Chemistry GA LR360 UT WOS:A1993LR36000025 ER PT J AU KEISKI, RL DESPONDS, O CHANG, YF SOMORJAI, GA AF KEISKI, RL DESPONDS, O CHANG, YF SOMORJAI, GA TI KINETICS OF THE WATER-GAS SHIFT REACTION OVER SEVERAL ALKANE ACTIVATION AND WATER-GAS SHIFT CATALYSTS SO APPLIED CATALYSIS A-GENERAL LA English DT Article DE KINETICS; METHANE COUPLING; OXYDEHYDROGENATION; WATER GAS SHIFT REACTION ID CARBON-MONOXIDE; RUTHENIUM; ZEOLITES; OXIDE AB The water-gas shift reaction (WGS) over three commercial WGS catalysts and four oxide catalysts used for alkane activation has been studied at atmospheric pressure and in the temperature range of 160 to 600-degrees-C. The oxide catalysts used were two ethane oxydehydrogenation catalysts, namely Mo19V5Nb1Ox and V5Nb1Ox, and two methane coupling catalysts, namely Ca3NiK0.05Ox and LiMgO(x). The commercial water-ps shift catalysts used were two Fe3O4-Cr2O3 catalysts and one CuZnO/Al2O3 catalyst. All catalysts except the ethane oxidehydrogenation catalysts and LiMgO(x) showed high activity for the water-gas shift reaction below 400-degrees-C. It is evident that Fe, Cr, Zn, Cu and Ni oxides or metals enhance the water-ps shift reaction. The commercial CuZnO/Al2O3 catalyst was the most active WGS catalyst per gram of the catalyst at 160-250-degrees-C, whereas the Fe3O4-Cr2O3 catalysts showed high activity above 300-degrees-C. The specific rates of CaNiK0.05Ox and LiMgO(x) were, however, higher than the specific rates of the commercial catalysts. The apparent activation energies for the conversion of carbon monoxide to carbon dioxide were 53 kJ/mol for CuZnO/Al2O3, 68 kJ/mol for LiMgO(x), 86 kJ/mol for Ca3NiK0.05Ox, 95 kJ/mol and 110 kJ/mol for the Fe3O4-Cr2O3 catalysts, 101 kJ/mol for Mo19V5Nb1Ox and 132 kJ/mol for V5Nb1Ox. For the commercial catalysts, the power-law rate model with concentration exponents of carbon monoxide and water close to one and zero, respectively, gave the best results. For V5Nb1Ox and Ca3NiK0.05Ox the concentration exponents of carbon monoxide and water close to 0.5 fit the results best. For Mo19V5Nb1Ox the reaction was first order in carbon monoxide concentration whereas for LiMgO(x) it was zero order in carbon monoxide concentration and 0.5 order in water concentration. Ca3NiK0.05Ox and LiMgO(x) were active for the water-gas shift reaction in the temperature range of oxidative methane coupling. Thus, it is probable that the water-gas shift reaction can occur during methane coupling when these catalysts are used. The water-gas shift reaction is, however, unlikely to occur during the oxidative dehydrogenation of ethane since the conversions of carbon monoxide to carbon dioxide were very low at 350-500-degrees-C. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 39 TC 51 Z9 52 U1 2 U2 25 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0926-860X J9 APPL CATAL A-GEN JI Appl. Catal. A-Gen. PD AUG 2 PY 1993 VL 101 IS 2 BP 317 EP 338 DI 10.1016/0926-860X(93)80277-W PG 22 WC Chemistry, Physical; Environmental Sciences SC Chemistry; Environmental Sciences & Ecology GA LR007 UT WOS:A1993LR00700010 ER PT J AU LUO, JS MERCHANT, N MARONI, VA RILEY, GN CARTER, WL AF LUO, JS MERCHANT, N MARONI, VA RILEY, GN CARTER, WL TI INFLUENCE OF SILVER CLADDING ON THE FORMATION AND ALIGNMENT OF THE (BI2-XPBX)SR2CA2CU3O10+DELTA PHASE SO APPLIED PHYSICS LETTERS LA English DT Article ID SUPERCONDUCTING WIRES; TAPES AB Cross-section transmission electron microscopy was used to investigate the interaction of silver with (Bi,Pb)-Sr-Ca-Cu-O phases during the formation of (Bi2-xPbx)Sr2Ca2Cu3O10+delta (Bi-2223) in a silver-sheathed wire containing a powder composed of (Bi,Pb)2Sr2CaCu2O8+delta (Bi-2212) plus second phases. Observations of the interfacial regions of samples quenched at different stages of conversion revealed that (1) Bi-2212 is initially in direct contact with silver, with the (001) planes parallel to the interface; (2) an amorphous layer between Bi-2212 and silver appears during the induction period that precedes the conversion reaction; and (3) Bi-2223 is detected at the silver/powder interface hundreds of minutes before it begins to appear in regions of the powder away from the interface. The implications of these results are presented and discussed. C1 AMER SUPERCONDUCTOR CORP,WATERTOWN,MA 02172. RP LUO, JS (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 16 TC 48 Z9 49 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 AUG 2 PY 1993 VL 63 IS 5 BP 690 EP 692 DI 10.1063/1.110778 PG 3 WC Physics, Applied SC Physics GA LQ133 UT WOS:A1993LQ13300042 ER PT J AU WELP, U CRABTREE, GW WAGNER, JL HINKS, DG RADAELLI, PG JORGENSEN, JD MITCHELL, JF DABROWSKI, B AF WELP, U CRABTREE, GW WAGNER, JL HINKS, DG RADAELLI, PG JORGENSEN, JD MITCHELL, JF DABROWSKI, B TI THE IRREVERSIBILITY LINE OF HGBA2CUO4+DELTA SO APPLIED PHYSICS LETTERS LA English DT Article ID SINGLE-CRYSTALS; TEMPERATURES; IRRADIATION; YBA2CU3O7; DEFECTS; TC AB Using magnetization hysteresis loops we have determined the irreversibility line of polycrystalline samples of HgBa2CuO4+delta and Hg0.8Pb0.2Ba2CuO4+delta. The irreversibility line is found at rather high temperatures. It does not show the drastic depression with increasing temperature as is observed in highly anisotropic Bi/Tl-based CuO superconductors. At 77 K the irreversibility field is around 0.3 T, which is substantially higher than in Bi2Sr2CaCu2O8 and Bi2Sr2Ca2Cu3O10. The advantages of this material for large-scale applications are outlined. C1 ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439. NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115. RP WELP, U (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Radaelli, Paolo/C-2952-2011 OI Radaelli, Paolo/0000-0002-6717-035X NR 18 TC 67 Z9 67 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 AUG 2 PY 1993 VL 63 IS 5 BP 693 EP 695 DI 10.1063/1.109931 PG 3 WC Physics, Applied SC Physics GA LQ133 UT WOS:A1993LQ13300043 ER PT J AU ALLY, MR BRAUNSTEIN, J AF ALLY, MR BRAUNSTEIN, J TI BET MODEL FOR CALCULATING ACTIVITIES OF SALTS AND WATER, MOLAR ENTHALPIES, MOLAR VOLUMES AND LIQUID-SOLID PHASE-BEHAVIOR IN CONCENTRATED ELECTROLYTE-SOLUTIONS SO FLUID PHASE EQUILIBRIA LA English DT Article ID AQUEOUS-ELECTROLYTE; VAPOR-PRESSURE; THERMODYNAMICS; MIXTURES; SYSTEMS; MGCL2 AB This paper demonstrates the calculation of the activities of salts and water, excess properties and solid phase equilibria in aqueous media by applying the general properties of solutions to extensions of the Stokes-Robinson application of the Brunauer-Emmett-Teller (BET) adsorption isotherm. Such a comprehensive treatment provides a thermodynamically consistent method of obtaining equilibrium properties of moderately to highly concentrated (up to molten salt regime) aqueous solutions with as few as two parameters, plus a third parameter in the case of molar volumes. The present state of development allows treatment of electrolytes with common anions or common cations, but does not yet include reciprocal salt mixtures. Multicomponent aqueous solutions can be treated as pseudobinary if desired, by invoking the proposed mixing rules. The real advantage of the method lies in the use of a minimal number of parameters to represent a wide variety of thermodynamic properties with reasonable accuracy over relatively wide temperature and concentration ranges. This comprehensive treatment is verified through comparison of predicted results and experimental data on: water vapor pressure-temperature-composition behavior of aqueous LiBr and of (Li, K, Na)NO3 mixtures; partial excess and molar volume-temperature-composition of aqueous LiBr and of (Li, K, Na)NO3 mixtures; partial excess and integral molar enthalpy temperature-composition of aqueous LiBr; phase equilibria of NaOH in aqueous solution. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. RP ALLY, MR (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA. NR 32 TC 34 Z9 34 U1 3 U2 8 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 AUG 2 PY 1993 VL 87 IS 2 BP 213 EP 236 DI 10.1016/0378-3812(93)85028-K PG 24 WC Thermodynamics; Chemistry, Physical; Engineering, Chemical SC Thermodynamics; Chemistry; Engineering GA LQ438 UT WOS:A1993LQ43800003 ER PT J AU LYON, WS AF LYON, WS TI ANOTHER ARCHIMEDES PRINCIPLE SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-LETTERS LA English DT Editorial Material RP LYON, WS (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AKADEMIAI KIADO PI BUDAPEST PA PO BOX 245, H-1519 BUDAPEST, HUNGARY SN 0236-5731 J9 J RADIOAN NUCL CH LE JI J. Radioanal. Nucl. Chem.-Lett. PD AUG 2 PY 1993 VL 176 IS 2 BP 87 EP 90 DI 10.1007/BF02163188 PG 4 WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA LN196 UT WOS:A1993LN19600001 ER PT J AU BROWN, HR CHAR, K DELINE, VR GREEN, PF AF BROWN, HR CHAR, K DELINE, VR GREEN, PF TI EFFECTS OF A DIBLOCK COPOLYMER ON ADHESION BETWEEN IMMISCIBLE POLYMERS .1. PS-PMMA COPOLYMER BETWEEN PS AND PMMA SO MACROMOLECULES LA English DT Article ID POLYETHYLENE POLYSTYRENE BLENDS; BLOCK COPOLYMERS; INCOMPATIBLE POLYMERS; MOLECULAR DESIGN; INTERFACES; MORPHOLOGY; ADSORPTION; TOUGHNESS; SYSTEMS; CHAINS AB Thin layers of polystyrene (PS)-poly(methyl methacrylate) (PMMA) diblock copolymers were placed at the interface between PS and PMMA homopolymers, and the samples were joined at high temperatures. Fracture tests were used to measure the interface toughness, and secondary ion mass spectroscopy (SIMS) was used to examine the organization of the diblock. Diblock copolymers with molecular weights of 84 000 and above gave strong interfaces whose saturation toughness was independent of the copolymer molecular weight. Both kinetic studies and the SIMS results showed that the rate of diblock copolymer organization was a function of the layer thickness. Copolymer layers of thickness greater than about one-fourth of a long period did not organize in a simple way at the interface but gave interfaces with a high toughness. For thin layers that did organize, the toughness was low and the diblock molecules broke near their junction points. Low molecular weight symmetric and asymmetric diblocks were shown to give lower toughnesses than the high molecular weight materials, probably because they were pulled out of the PS homopolymer. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP BROWN, HR (reprint author), IBM CORP,ALMADEN RES CTR,DIV RES,650 HARRY RD,SAN JOSE,CA 95120, USA. NR 31 TC 190 Z9 191 U1 2 U2 35 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD AUG 2 PY 1993 VL 26 IS 16 BP 4155 EP 4163 DI 10.1021/ma00068a014 PG 9 WC Polymer Science SC Polymer Science GA LR352 UT WOS:A1993LR35200014 ER PT J AU TANG, P REIMER, JA DENN, MM AF TANG, P REIMER, JA DENN, MM TI NUCLEAR-MAGNETIC-RESONANCE STUDIES OF BLENDS CONTAINING POLY(ETHYLENE-TEREPHTHALATE) (PET) AND POLY(P-HYDROXYBENZOIC ACID-CO-P-HYDROXYNAPHTHOIC ACID) (VECTRA-A) SO MACROMOLECULES LA English DT Article ID TRANS-ESTERIFICATION; POLYMER BLENDS; SPIN DIFFUSION; DYNAMICS; TEMPERATURE; SYSTEMS; SOLIDS; NMR AB Solid-state NMR techniques are used to characterize the interfacial interactions and morphology in Vectra-A/PET blends. Two-dimensional rotor-driven C-13 Spin diffusion NMR and indirect detection of H-1 spin-lattice relaxation (T1) are used to determine the extent of intimate molecular mixing, carbon-13 magic angle spinning line shapes emanating from methylene carbons in PET are used to monitor the conformation of PET in the blends, and indirect detection of H-1 spin-lattice relaxation in the rotational frame (T1rho) is used to estimate the polymer crystallinity. The results are presented in terms of a scenario in which Vectra can penetrate PET regions in blends upon annealing in the melt. This scenario accounts well for previously published thermal data. C1 LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. NR 25 TC 36 Z9 38 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD AUG 2 PY 1993 VL 26 IS 16 BP 4269 EP 4274 DI 10.1021/ma00068a030 PG 6 WC Polymer Science SC Polymer Science GA LR352 UT WOS:A1993LR35200030 ER PT J AU HUO, PP CEBE, P CAPEL, M AF HUO, PP CEBE, P CAPEL, M TI DYNAMIC-MECHANICAL RELAXATION AND X-RAY-SCATTERING STUDY OF POLY(BUTYLENE TEREPHTHALATE) POLYARYLATE BLENDS SO MACROMOLECULES LA English DT Article ID CRYSTAL AMORPHOUS INTERPHASE; MULTIPLE MELTING ENDOTHERMS; POLY(ETHER ETHER KETONE); BINARY POLYMER BLENDS; POLY(PHENYLENE SULFIDE); POLY(TETRAMETHYLENE TEREPHTHALATE); POLY(METHYL METHACRYLATE); CRYSTALLIZATION BEHAVIOR; POINT DEPRESSION; THERMAL-ANALYSIS AB Blends of poly(butylene terephthalate) and polyarylate have previously been shown to be miscible for all blend compositions in the melt state or in the quenched amorphous state. Recently, we showed that all compositions of these blends exhibit depression of the thermodynamic melting point and a negative Flory interaction parameter.1 Once PBT crystallizes, it will form crystal lamellae consisting of pure PBT and an amorphous phase of noncrystalline PBT and PAr. The composition of the amorphous phase is the subject of the present study. Dynamic mechanical analysis shows that there exist two tan delta maxima, indicating two amorphous regions, which are assigned to a mixed amorphous phase and a region primarily consisting of amorphous PAr. The location of the PAr depends on the blend composition and was studied by small-angle X-ray scattering (SAXS). For PAr composition < 0.50, the long period of lamellar stacks, obtained from SAXS, increases as PAr composition increases, while for PAr > 0.50, it decreases. Lamellar thickness can be estimated from the breadth of (001) using wide-angle X-ray scattering. By combining the long period, lamellar thickness, and crystallinity, we derive a general methodology to describe the morphology of the blends. One main conclusion of this work is that the long period is strongly affected by the degree of undercooling. When blends of different composition are prepared with the same thermal history (i.e., the same T(c)), their long periods will vary due to the different degrees of undercooling and competition between crystallization and phase separation. Our results show that, for PBT/PAr blends, interlamellar PAr structure holds for blends with PAr < 0.40, while either interfibrillar or interspherulitic structure exists for blends with PAr > 0.40. C1 MIT,DEPT MAT SCI & ENGN,CAMBRIDGE,MA 02139. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 48 TC 51 Z9 52 U1 2 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0024-9297 J9 MACROMOLECULES JI Macromolecules PD AUG 2 PY 1993 VL 26 IS 16 BP 4275 EP 4282 DI 10.1021/ma00068a031 PG 8 WC Polymer Science SC Polymer Science GA LR352 UT WOS:A1993LR35200031 ER PT J AU SREDNICKI, M AF SREDNICKI, M TI ENTROPY AND AREA SO PHYSICAL REVIEW LETTERS LA English DT Article ID BLACK-HOLES AB The ground-state density matrix for a massless free field is traced over the degrees of freedom residing inside an imaginary sphere; the resulting entropy is shown to be proportional to the area (and not the volume) of the sphere. Possible connections with the physics of black holes are discussed. C1 LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP SREDNICKI, M (reprint author), UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720, USA. NR 13 TC 799 Z9 804 U1 2 U2 17 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 AUG 2 PY 1993 VL 71 IS 5 BP 666 EP 669 DI 10.1103/PhysRevLett.71.666 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ107 UT WOS:A1993LQ10700003 ER PT J AU ABE, F ALBROW, M AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BACCHETTA, N BADEN, AR BADGETT, W BAILEY, MW BAMBERGER, A 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 BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CEN, Y CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FRAUTSCHI, M FELDMAN, GJ FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GONZALEZ, J GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, N LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTHEWS, JAJ MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PIACENTINO, AG PLUNKETT, R PONDROM, L PROUDFOOT, J PTOHOS, F PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCIACCA, G SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P SPIES, A STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSAY, Y TSENG, J TURINI, N UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WALSH, J WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZHANG, W ZUCCHELLI, S AF ABE, F ALBROW, M AMIDEI, D ANWAYWIESE, C APOLLINARI, G ATAC, M AUCHINCLOSS, P AZZI, P BACCHETTA, N BADEN, AR BADGETT, W BAILEY, MW BAMBERGER, A 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 BERETVAS, A BERGE, JP BERTOLUCCI, S BIERY, K BHADRA, S BINKLEY, M BISELLO, D BLAIR, R BLOCKER, C BODEK, A BOLOGNESI, V BOOTH, AW BOSWELL, C BRANDENBURG, G BROWN, D BUCKLEYGEER, E BUDD, HS BUSETTO, G BYONWAGNER, A BYRUM, KL CAMPAGNARI, C CAMPBELL, M CANER, A CAREY, R CARITHERS, W CARLSMITH, D CARROLL, JT CASHMORE, R CASTRO, A CEN, Y CERVELLI, F CHADWICK, K CHAPMAN, J CHIARELLI, G CHINOWSKY, W CIHANGIR, S CLARK, AG COBAL, M CONNOR, D CONTRERAS, M COOPER, J CORDELLI, M CRANE, D CUNNINGHAM, JD DAY, C DEJONGH, F DELLAGNELLO, S DELLORSO, M DEMORTIER, L DENBY, B DERWENT, PF DEVLIN, T DIBITONTO, D DICKSON, M DRUCKER, RB DUNN, A EINSWEILER, K ELIAS, JE ELY, R ENO, S ERREDE, S ETCHEGOYEN, A FARHAT, B FRAUTSCHI, M FELDMAN, GJ FLAUGHER, B FOSTER, GW FRANKLIN, M FREEMAN, J FRISCH, H FUESS, T FUKUI, Y GARFINKEL, AF GAUTHIER, A GEER, S GERDES, DW GIANNETTI, P GIOKARIS, N GIROMINI, P GLADNEY, L GOLD, M GONZALEZ, J GOULIANOS, K GRASSMANN, H GRIECO, GM GRINDLEY, R GROSSOPILCHER, C HABER, C HAHN, SR HANDLER, R HARA, K HARRAL, B HARRIS, RM HAUGER, SA HAUSER, J HAWK, C HESSING, T HOLLEBEEK, R HOLLOWAY, L HOLSCHER, A HONG, S HOUK, G HU, P HUBBARD, B HUFFMAN, BT HUGHES, R HURST, P HUTH, J HYLEN, J INCAGLI, M INO, T ISO, H JENSEN, H JESSOP, CP JOHNSON, RP JOSHI, U KADEL, RW KAMON, T KANDA, S KARDELIS, DA KARLINER, I KEARNS, E KEEBLE, L KEPHART, R KESTEN, P KEUP, RM KEUTELIAN, H KIM, D KIM, SB KIM, SH KIM, YK KIRSCH, L KONDO, K KONIGSBERG, J KORDAS, K KOVACS, E KRASBERG, M KUHLMANN, SE KUNS, E LAASANEN, AT LAMMEL, S LAMOUREUX, JI LEONE, S LEWIS, JD LI, W LIMON, P LINDGREN, M LISS, TM LOCKYER, N LORETI, M LOW, EH LUCCHESI, D LUCHINI, CB LUKENS, P MAAS, P MAESHIMA, K MANGANO, M MARRINER, JP MARIOTTI, M MARKELOFF, R MARKOSKY, LA MATTHEWS, JAJ MATTINGLY, R MCINTYRE, P MENZIONE, A MESCHI, E MEYER, T MIKAMO, S MILLER, M MIMASHI, T MISCETTI, S MISHINA, M MIYASHITA, S MORITA, Y MOULDING, S MUELLER, J MUKHERJEE, A MULLER, T NAKAE, LF NAKANO, I NELSON, C NEUBERGER, D NEWMANHOLMES, C NG, JST NINOMIYA, M NODULMAN, L OGAWA, S PAOLETTI, R PAPADIMITRIOU, V PARA, A PARE, E PARK, S PATRICK, J PAULETTA, G PESCARA, L PHILLIPS, TJ PIACENTINO, AG PLUNKETT, R PONDROM, L PROUDFOOT, J PTOHOS, F PUNZI, G QUARRIE, D RAGAN, K REDLINGER, G RHOADES, J ROACH, M RIMONDI, F RISTORI, L ROBERTSON, WJ RODRIGO, T ROHALY, T ROODMAN, A SAKUMOTO, WK SANSONI, A SARD, RD SAVOYNAVARRO, A SCARPINE, V SCHLABACH, P SCHMIDT, EE SCHNEIDER, O SCHUB, MH SCHWITTERS, R SCIACCA, G SCRIBANO, A SEGLER, S SEIDEL, S SEIYA, Y SGANOS, G SHAPIRO, M SHAW, NM SHEAFF, M SHOCHET, M SIEGRIST, J SILL, A SINERVO, P SKARHA, J SLIWA, K SMITH, DA SNIDER, FD SONG, L SONG, T SPAHN, M SPHICAS, P SPIES, A STDENIS, R STANCO, L STEFANINI, A SULLIVAN, G SUMOROK, K SWARTZ, RL TAKANO, M TAKIKAWA, K TAREM, S TARTARELLI, F TETHER, S THERIOT, D TIMKO, M TIPTON, P TKACZYK, S TOLLESTRUP, A TONNISON, J TRISCHUK, W TSAY, Y TSENG, J TURINI, N UKEGAWA, F UNDERWOOD, D VEJCIK, S VIDAL, R WAGNER, RG WAGNER, RL WAINER, N WALKER, RC WALSH, J WARBURTON, A WATTS, G WATTS, T WEBB, R WENDT, C WENZEL, H WESTER, WC WESTHUSING, T WHITE, SN WICKLUND, AB WICKLUND, E WILLIAMS, HH WINER, BL WOLINSKI, J WU, DY WU, X WYSS, J YAGIL, A YASUOKA, K YE, Y YEH, GP YOH, J YOKOYAMA, M YUN, JC ZANETTI, A ZETTI, F ZHANG, S ZHANG, W ZUCCHELLI, S TI CENTER-OF-MASS ANGULAR-DISTRIBUTION OF PROMPT PHOTONS PRODUCED IN P(P)OVER-BAR COLLISIONS AT ROOT-S = 1.8-TEV SO PHYSICAL REVIEW LETTERS LA English DT Article ID CROSS-SECTION; 1.8 TEV; PBARP COLLISIONS; COLLIDER AB Data taken with the Collider Detector at Fermilab (CDF) during the 1988-1989 run of the Tevatron are used to measure the distribution of the center-of-mass (rest frame of the initial state partons) angle between isolated prompt photons and the beam direction. The shape of the angular distribution for photon-jet events is found to be significantly different from that observed in dijet data. The QCD predictions show qualitative agreement with the observed prompt photon angular distribution. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. BRANDEIS UNIV,WALTHAM,MA 02254. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. UNIV CHICAGO,CHICAGO,IL 60637. DUKE UNIV,DURHAM,NC 27706. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IST NAZL FIS NUCL,NAZL FRASCATI LAB,FRASCATI,ITALY. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV ILLINOIS,URBANA,IL 61801. MCGILL UNIV,INST PARTICLE PHYS,MONTREAL H3A 2T5,QUEBEC,CANADA. UNIV TORONTO,TORONTO M5S 1A1,ONTARIO,CANADA. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. MIT,CAMBRIDGE,MA 02139. UNIV MICHIGAN,ANN ARBOR,MI 48109. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY. UNIV PENN,PHILADELPHIA,PA 19104. UNIV PITTSBURGH,PITTSBURGH,PA 15260. UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY. SCUOLA NORMAL SUPER PISA,I-56100 PISA,ITALY. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV ROCHESTER,ROCHESTER,NY 14627. ROCKEFELLER UNIV,NEW YORK,NY 10021. RUTGERS UNIV,PISCATAWAY,NJ 08854. TEXAS A&M UNIV SYST,COLL STN,TX 77843. UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN. TUFTS UNIV,MEDFORD,MA 02155. UNIV WISCONSIN,MADISON,WI 53706. RP ABE, F (reprint author), NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI,JAPAN. RI St.Denis, Richard/C-8997-2012; Chiarelli, Giorgio/E-8953-2012; Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Warburton, Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014 OI Chiarelli, Giorgio/0000-0001-9851-4816; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Warburton, Andreas/0000-0002-2298-7315; NR 11 TC 6 Z9 6 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 AUG 2 PY 1993 VL 71 IS 5 BP 679 EP 683 DI 10.1103/PhysRevLett.71.679 PG 5 WC Physics, Multidisciplinary SC Physics GA LQ107 UT WOS:A1993LQ10700006 ER PT J AU MERCER, DJ TADDEUCCI, TN RYBARCYK, LJ CHEN, XY PROUT, DL BYRD, RC MCCLELLAND, JB SAILOR, WC DELUCIA, S LUTHER, B MARCHLENSKI, DG SUGARBAKER, E GULMEZ, E WHITTEN, CA GOODMAN, CD RAPAPORT, J AF MERCER, DJ TADDEUCCI, TN RYBARCYK, LJ CHEN, XY PROUT, DL BYRD, RC MCCLELLAND, JB SAILOR, WC DELUCIA, S LUTHER, B MARCHLENSKI, DG SUGARBAKER, E GULMEZ, E WHITTEN, CA GOODMAN, CD RAPAPORT, J TI POLARIZATION TRANSFER IN ((P)OVER-RIGHT-ARROW, (N)OVER-RIGHT-ARROW) REACTIONS AT 318-MEV AND 494-MEV AND THE EFFECTIVE INTERACTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID SPIN ISOSPIN INTERACTION; INTERMEDIATE ENERGIES; SCATTERING AB The polarization transfer observable D(LL)(0-degrees) has been measured for H-2(p over arrow pointing right, n over arrow pointing right)2p, C-12(p over arrow pointing right, n over arrow pointing right)N-12, and C-14(p over arrow pointing right, n over arrow pointing right)N-14 reactions with beam energies of 318 and 494 MeV. The deuterium results are in close agreement with free NN scattering constrained to the DELTAJ(pi) = 1+ channel. The results for the carbon targets, however, are systematically more negative than those for deuterium, which suggests a difference between the free and effective nucleon-nucleon interactions. Such a medium modification of the spin-dependent interaction may have important implications for interpretation of other intermediate-energy scattering experiments. C1 UNIV COLORADO,BOULDER,CO 80309. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. OHIO STATE UNIV,COLUMBUS,OH 43210. UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47405. OHIO UNIV,ATHENS,OH 45701. RI Gulmez, Erhan/P-9518-2015 OI Gulmez, Erhan/0000-0002-6353-518X NR 27 TC 15 Z9 15 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 AUG 2 PY 1993 VL 71 IS 5 BP 684 EP 687 DI 10.1103/PhysRevLett.71.684 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ107 UT WOS:A1993LQ10700007 ER PT J AU FLIBOTTE, S HACKMAN, G THEISEN, C ANDREWS, HR BALL, GC BEAUSANG, CW BECK, FA BELIER, G BENTLEY, MA BYRSKI, T CURIEN, D DEFRANCE, G DISDIER, D DUCHENE, G FALLON, P HAAS, B JANZEN, VP JONES, PM KHARRAJA, B KUEHNER, JA LISLE, JC MERDINGER, JC MULLINS, SM PAUL, ES PREVOST, D RADFORD, DC RAUCH, V SMITH, JF STYCZEN, J TWIN, PJ VIVIEN, JP WADDINGTON, JC WARD, D ZUBER, K AF FLIBOTTE, S HACKMAN, G THEISEN, C ANDREWS, HR BALL, GC BEAUSANG, CW BECK, FA BELIER, G BENTLEY, MA BYRSKI, T CURIEN, D DEFRANCE, G DISDIER, D DUCHENE, G FALLON, P HAAS, B JANZEN, VP JONES, PM KHARRAJA, B KUEHNER, JA LISLE, JC MERDINGER, JC MULLINS, SM PAUL, ES PREVOST, D RADFORD, DC RAUCH, V SMITH, JF STYCZEN, J TWIN, PJ VIVIEN, JP WADDINGTON, JC WARD, D ZUBER, K TI MULTIPARTICLE EXCITATIONS AND IDENTICAL BANDS IN THE SUPERDEFORMED GD-149 NUCLEUS SO PHYSICAL REVIEW LETTERS LA English DT Article ID DY-152; STATES; ALIGNMENT; REGION; DEFORMATION; SYMMETRY AB Eight superdeformed rotational bands have been observed in the 149Gd nucleus. Several excited bands have partners in neighboring nuclei which differ by up to four nucleons, with nearly identical dynamic moments of inertia and quantized gamma-ray phasing. These observations cannot be easily explained by theoretical models including an intrinsic scaling with mass of the moment of inertia. A paired backbend and an interaction due to an accidental degeneracy between two superdeformed levels have also been observed. C1 MCMASTER UNIV,DEPT PHYS & ASTRON,HAMILTON L8S 4K1,ONTARIO,CANADA. CHALK RIVER LABS,AECL RES,CHALK RIVER K0J 1J0,ON,CANADA. UNIV LIVERPOOL,OLIVER LODGE LAB,LIVERPOOL L69 3BX,ENGLAND. SERC,DARESBURY LAB,SCI & ENGN RES COUNCIL,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720. UNIV MANCHESTER,SCHUSTER LAB,MANCHESTER M13 9PL,LANCS,ENGLAND. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. RP FLIBOTTE, S (reprint author), UNIV LOUIS PASTEUR,CNRS,INST NATL PHYS NUCL & PHYS PARTICULES,F-67037 STRASBOURG,FRANCE. RI CURIEN, Dominique/B-6718-2013; radford, David/A-3928-2015; THEISEN, Christophe/A-9343-2015 OI THEISEN, Christophe/0000-0002-8509-1022 NR 35 TC 28 Z9 28 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 AUG 2 PY 1993 VL 71 IS 5 BP 688 EP 691 DI 10.1103/PhysRevLett.71.688 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ107 UT WOS:A1993LQ10700008 ER PT J AU SYPHERS, M BALL, M BRABSON, B BUDNICK, J CAUSSYN, DD CHAO, AW COLLINS, J DERENCHUK, V DUTT, S EAST, G ELLISON, M ELLISON, T FRIESEL, D GABELLA, W HAMILTON, B HUANG, H JONES, WP LEE, SY LI, D MINTY, MG NAGAITSEV, S NG, KY PEI, X RONDEAU, G SLOAN, T TENG, L TEPIKIAN, S WANG, Y YAN, YT ZHANG, PL AF SYPHERS, M BALL, M BRABSON, B BUDNICK, J CAUSSYN, DD CHAO, AW COLLINS, J DERENCHUK, V DUTT, S EAST, G ELLISON, M ELLISON, T FRIESEL, D GABELLA, W HAMILTON, B HUANG, H JONES, WP LEE, SY LI, D MINTY, MG NAGAITSEV, S NG, KY PEI, X RONDEAU, G SLOAN, T TENG, L TEPIKIAN, S WANG, Y YAN, YT ZHANG, PL TI EXPERIMENTAL-STUDY OF SYNCHRO-BETATRON COUPLING INDUCED BY DIPOLE MODULATION SO PHYSICAL REVIEW LETTERS LA English DT Article AB Synchro-betatron coupling in a proton storage ring with electron cooling was studied experimentally by modulating a transverse dipole field close to the synchrotron frequency. The combination of the electron cooling and transverse field modulation on the synchrotron oscillation is equivalent to a dissipative parametric resonant system. The proton bunch was observed to split longitudinally into two pieces, or beamlets, converging toward attractors of the dissipative system. These phenomena might be important in understanding the effect of ground vibration on the Superconducting Super Collider beam, and the effect of power supply ripple on the Relativistic Heavy-Ion Collider beam. C1 INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47405. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. ARGONNE NATL LAB,APS,ARGONNE,IL 60439. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP SYPHERS, M (reprint author), SSC LAB,2550 BECKLEYMEADE AVE,DALLAS,TX 75237, USA. NR 18 TC 32 Z9 32 U1 2 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 AUG 2 PY 1993 VL 71 IS 5 BP 719 EP 722 DI 10.1103/PhysRevLett.71.719 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ107 UT WOS:A1993LQ10700016 ER PT J AU LONG, FH LOVE, SP SWANSON, BI MCKENZIE, RH AF LONG, FH LOVE, SP SWANSON, BI MCKENZIE, RH TI EVIDENCE FOR MODIFICATION OF THE ELECTRONIC DENSITY-OF-STATES BY ZERO-POINT LATTICE MOTION IN ONE-DIMENSION - LUMINESCENCE AND RESONANCE RAMAN STUDIES OF AN MX SOLID SO PHYSICAL REVIEW LETTERS LA English DT Article ID BRIDGED MIXED-VALENCE; OPTICAL-ABSORPTION; METAL-COMPLEXES; CRYSTAL-STRUCTURE; GROUND-STATE; MODEL; POLYACETYLENE; TRANSITION; POLYMERS; VIBRATIONS AB Luminescence spectra, both emission and excitation, and the excitation dependence of the resonance Raman spectra, have been measured for the quasi-one-dimensional charge-density-wave material [Pt(en)2][Pt(en)2Cl2](ClO4)4, en = 1,2-diaminoethane. While the luminescence experiments show the existence of tail states at low temperature in the band gap region, the Raman measurements conclusively demonstrate that this tail does not arise from ordinary static structural disorder. These results can be explained by considering the zero-point motion of the lattice. C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210. RP LONG, FH (reprint author), LOS ALAMOS NATL LAB,SPECTROSCOPY & BIOCHEM GRP INC-14,LOS ALAMOS,NM 87545, USA. RI McKenzie, Ross/D-8900-2013; OI Love, Steven/0000-0003-0588-9622 NR 36 TC 38 Z9 39 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 AUG 2 PY 1993 VL 71 IS 5 BP 762 EP 765 DI 10.1103/PhysRevLett.71.762 PG 4 WC Physics, Multidisciplinary SC Physics GA LQ107 UT WOS:A1993LQ10700027 ER PT J AU HONG, SI GRAY, GT LEWANDOWSKI, JJ AF HONG, SI GRAY, GT LEWANDOWSKI, JJ TI DYNAMIC DEFORMATION-BEHAVIOR OF AL-ZN-MG-CU ALLOY MATRIX COMPOSITES REINFORCED WITH 20 VOL-PERCENT SIC SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID MECHANICAL-PROPERTIES; HYDROSTATIC-PRESSURE; CRACK INITIATION; ALUMINUM-ALLOYS; MICROSTRUCTURE; FRACTURE; DUCTILITY; STRESS; STRAIN; COPPER AB The dynamic mechanical response and substructure evolution of underaged and overaged Al-Zn-Mg-Cu alloys with and without 20 vol.% SiC particles were investigated and compared to those following quasi-static compression. The hardening rates of the overaged composites and control alloys were found to be smaller than those of their underaged counterparts. Overaged composites and the control alloys showed more strain rate sensitive behavior than the underaged composites and alloys. The flow stress of the composites was found to decrease at total strains larger than 0.15 in the high-rate Hopkinson pressure bar tests. A more rapid decrease in stress in the underaged composites suggests that microstructural damage in the underaged condition is greater than that in the overaged condition tested at high strain rates. Cracks near the SiC/matrix interfaces were observed more frequently in the underaged Hopkinson pressure bar samples. The more frequent interface cracks in the underaged composites are thought to result from much slower relaxation of the stresses and strains built up at the interface due to much more difficult thermally activated deformation. C1 CASE WESTERN RESERVE UNIV, DEPT MAT SCI & ENGN, CLEVELAND, OH 44106 USA. RP HONG, SI (reprint author), LOS ALAMOS NATL LAB, DIV MAT SCI & TECHNOL, LOS ALAMOS, NM 87545 USA. NR 54 TC 86 Z9 92 U1 2 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD AUG PY 1993 VL 41 IS 8 BP 2337 EP 2351 DI 10.1016/0956-7151(93)90314-I PG 15 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA LN829 UT WOS:A1993LN82900008 ER PT J AU MUTO, S SCHRYVERS, D MERK, N TANNER, LE AF MUTO, S SCHRYVERS, D MERK, N TANNER, LE TI HIGH-RESOLUTION ELECTRON-MICROSCOPY AND ELECTRON-DIFFRACTION STUDY OF THE DISPLACIVE TRANSFORMATION OF THE NI2AL PHASE IN A NI-65 AL-35 ALLOY AND ASSOCIATED WITH THE MARTENSITIC-TRANSFORMATION SO ACTA METALLURGICA ET MATERIALIA LA English DT Article ID NI-AL; PREMARTENSITIC MICROSTRUCTURES; BETA-2 PHASE; IMAGES AB The Ni-rich Ni-Al beta2 phase (CsCl structure) exhibits the precipitation of a metastable Ni2Al phase, which is closely related to an underlying lattice instability of the [111] phonon branch in the beta2 phase. The Ni2Al precipitates undergo both the Bain distortion and twinning together with the martensitic transformation of the beta2 matrix. The resulting structure of the Ni2Al precipitates in the martensite is presented and discussed. C1 UNIV ANTWERP, EMAT, B-2020 ANTWERP, BELGIUM. ECOLE POLYTECH FED LAUSANNE, LMM, DMX, CH-1015 LAUSANNE, SWITZERLAND. LAWRENCE LIVERMORE NATL LAB, DEPT MAT SCI, LIVERMORE, CA 94550 USA. RI Muto, Shunsuke/G-5741-2012 OI Muto, Shunsuke/0000-0001-6275-0649 NR 13 TC 31 Z9 33 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0956-7151 J9 ACTA METALL MATER JI Acta Metall. Mater. PD AUG PY 1993 VL 41 IS 8 BP 2377 EP 2383 DI 10.1016/0956-7151(93)90317-L PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA LN829 UT WOS:A1993LN82900011 ER PT J AU HANSEN, JS TURNER, PC AF HANSEN, JS TURNER, PC TI A PROCESS FOR MAKING LIGHTWEIGHT CAST-STEEL ARMOR SO ADVANCED MATERIALS & PROCESSES LA English DT Article RP HANSEN, JS (reprint author), US BUR MINES,ALBANY RES CTR,1450 QUEEN AVE SW,ALBANY,OR 97321, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 SN 0026-0665 J9 ADV MATER PROCESS JI Adv. Mater. Process. PD AUG PY 1993 VL 144 IS 2 BP 22 EP 24 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA MA505 UT WOS:A1993MA50500004 ER PT J AU ETTINGER, HJ AF ETTINGER, HJ TI MEMBERS, GIVE US YOUR THOUGHTS SO AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL LA English DT Editorial Material RP ETTINGER, HJ (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INDUSTRIAL HYGIENE ASSOC PI FAIRFAX PA 2700 PROSPERITY AVE #250, FAIRFAX, VA 22031-4307 SN 0002-8894 J9 AM IND HYG ASSOC J JI Am. Ind. Hyg. Assoc. J. PD AUG PY 1993 VL 54 IS 8 BP A253 EP A253 PG 1 WC Environmental Sciences; Public, Environmental & Occupational Health SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health GA MK309 UT WOS:A1993MK30900001 ER PT J AU SOMERVILLE, CR AF SOMERVILLE, CR TI FUTURE-PROSPECTS FOR GENETIC-MODIFICATION OF THE COMPOSITION OF EDIBLE OILS FROM HIGHER-PLANTS SO AMERICAN JOURNAL OF CLINICAL NUTRITION LA English DT Article DE DIETARY LIPID; TRIACYLGLYCEROL; FATTY ACID DESATURATION; LINOLENIC ACID; LINOLEIC ACID; OLEIC ACID ID SEEDS; TRANSFORMATION; SAFFLOWER; MUTANT; LIPIDS AB It is now routinely possible to introduce genes into many plant species of agronomic significance. This has created new opportunities to genetically engineer higher plants to produce edible fats and oils with predefined fatty acid composition. Because of the chemical diversity of plants, the genes required for synthesis of many different types of lipids exist in nondomesticated species. Thus, it should be possible to modify the storage-lipid composition of crop plants by transferring the relevant genes from the wild species into crop plants. However, although a coherent model now exists for plant-lipid metabolism, a substantial amount of the specific information required to undertake genetic engineering of plant-lipid metabolism is not yet available. RP SOMERVILLE, CR (reprint author), MICHIGAN STATE UNIV, US DOE, PLANT RES LAB, E LANSING, MI 48824 USA. RI Somerville, Christopher/A-4048-2009 OI Somerville, Christopher/0000-0003-4647-0094 NR 27 TC 1 Z9 1 U1 0 U2 1 PU AMER SOC NUTRITION-ASN PI BETHESDA PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA SN 0002-9165 EI 1938-3207 J9 AM J CLIN NUTR JI Am. J. Clin. Nutr. PD AUG PY 1993 VL 58 IS 2 SU S BP 270 EP 275 PG 6 WC Nutrition & Dietetics SC Nutrition & Dietetics GA LQ626 UT WOS:A1993LQ62600005 ER PT J AU BEYER, WA SWARTZ, B AF BEYER, WA SWARTZ, B TI BISECTORS OF TRIANGLES AND TETRAHEDRA SO AMERICAN MATHEMATICAL MONTHLY LA English DT Article RP BEYER, WA (reprint author), LOS ALAMOS NATL LAB,DIV T,MS-B284,LOS ALAMOS,NM 87545, USA. NR 20 TC 0 Z9 0 U1 0 U2 0 PU MATHEMATICAL ASSOC AMER PI WASHINGTON PA 1529 18TH STREET NW, WASHINGTON, DC 20036 SN 0002-9890 J9 AM MATH MON JI Am. Math. Mon. PD AUG-SEP PY 1993 VL 100 IS 7 BP 626 EP 640 DI 10.2307/2323883 PG 15 WC Mathematics SC Mathematics GA LU627 UT WOS:A1993LU62700002 ER PT J AU XUE, YJ YEUNG, ES AF XUE, YJ YEUNG, ES TI ON-COLUMN DOUBLE-BEAM LASER-ABSORPTION DETECTION FOR CAPILLARY ELECTROPHORESIS SO ANALYTICAL CHEMISTRY LA English DT Article ID ZONE ELECTROPHORESIS; FLUORESCENCE DETECTION AB Double-beam laser absorption detection in capillary electrophoresis (CE) has been developed. This is based on the direct subtraction of reference and signal photocurrents by an electronic circuit, under feedback control, to reduce background noise. A simple equation for calculating concentrations has been proposed and was confirmed by experimental results. A practical noise-to-signal ratio of 1 x 10(-5) in intensity is achieved. This is 5 times lower than that of commercial CE systems. For absorbance detection, as low as 2 x 10(-8) M malachite green can be detected. This corresponds to a 25-fold improvement of detection limit over commercial systems. This gain in detectability results from both a reduction in intensity fluctuations (noise) and an increase in the effective absorption path length (signal). C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT ENDOCRINE RES,AMES,IA 50011. NR 23 TC 15 Z9 16 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 1993 VL 65 IS 15 BP 1988 EP 1993 DI 10.1021/ac00063a010 PG 6 WC Chemistry, Analytical SC Chemistry GA LQ347 UT WOS:A1993LQ34700010 ER PT J AU XU, CJ SUN, L KEPLEY, LJ CROOKS, RM RICCO, AJ AF XU, CJ SUN, L KEPLEY, LJ CROOKS, RM RICCO, AJ TI MOLECULAR-INTERACTIONS BETWEEN ORGANIZED, SURFACE-CONFINED MONOLAYERS AND VAPOR-PHASE PROBE MOLECULES .6. IN-SITU FTIR EXTERNAL REFLECTANCE SPECTROSCOPY OF MONOLAYER ADSORPTION AND REACTION CHEMISTRY SO ANALYTICAL CHEMISTRY LA English DT Article ID TRANSFORM INFRARED-SPECTROSCOPY; STRUCTURAL CHARACTERIZATION; GOLD SURFACES; ELECTROCHEMISTRY AB A new in-situ application of FTIR external reflectance spectroscopy (FTIR-ESR), which is useful for real-time evaluation of monolayer and multilayer adsorption and reaction chemistry at the vapor/solid interface at pressures near 1 atm, is described. The utility and versatility of the method is illustrated by two proof-of-concept experiments. The first experiment involves adsorption of H2N(CH2)9CH3 onto a naked Au substrate from the vapor phase. In-situ FTIR-ERS indicates that the amine forms a stable, ordered monolayer on the Au surface; that is, H2N(CH2)9CH3 self-assembles onto the Au surface from the vapor phase. The second experiment involves vapor-phase adsorption of a HS(C6H5)OH monolayer onto a naked Au surface, followed by an in-situ coupling reaction with [CH3(CH2)7](CH3)2SiCl. Real-time FTIR-ERS characterization of the organic bilayer is consistent with previously reported ex-situ FTIR-ERS results; however, kinetic data can be abstracted from the new in-situ data. The rate constant for the surface silane coupling reaction is estimated to be 0.30 min-1. C1 UNIV NEW MEXICO,DEPT MED,ALBUQUERQUE,NM 87131. SANDIA NATL LABS,DEPT MICROSENSOR 1315,ALBUQUERQUE,NM 87185. RI Ricco, Antonio/A-5273-2010; OI Ricco, Antonio/0000-0002-2355-4984 NR 28 TC 93 Z9 93 U1 3 U2 17 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 1993 VL 65 IS 15 BP 2102 EP 2107 DI 10.1021/ac00063a029 PG 6 WC Chemistry, Analytical SC Chemistry GA LQ347 UT WOS:A1993LQ34700029 ER PT J AU DIXON, PR PERRIN, RE ROKOP, DJ MAECK, R JANECKY, DR BANAR, JP AF DIXON, PR PERRIN, RE ROKOP, DJ MAECK, R JANECKY, DR BANAR, JP TI MEASUREMENT OF IRON ISOTOPES (FE-54, FE-56, FE-57, AND FE-58) IN SUBMICROGRAM QUANTITIES OF IRON SO ANALYTICAL CHEMISTRY LA English DT Article ID IONIZATION MASS-SPECTROMETRY AB Iron isotopes offer an excellent opportunity for detailed tracing of natural processes because of the range of stable isotopes (54, 56, 57, 58) and the importance of iron redox transitions in biochemical and inorganic processes. In this paper, we describe a significantly improved mass spectrometric technique for iron isotopic analysis that utilizes ion pulse counting detection and is calibrated with an absolute iron isotope abundance standard. All four stable iron isotopes are quantified in a single analysis to approximately 0.1% precision and accuracy using a low-temperature (1200-degrees-C) silica gel/boric acid technique on an improved source filament assembly composed of platinum and ceramic. Filament loads of 100-1000 ng can be utilized through implementation of an ultraclean work environment, improved chemistry, and a source designed specifically to minimize isobaric interference in the mass 50-60 region. RP DIXON, PR (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 30 TC 27 Z9 29 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 1993 VL 65 IS 15 BP 2125 EP 2130 DI 10.1021/ac00063a033 PG 6 WC Chemistry, Analytical SC Chemistry GA LQ347 UT WOS:A1993LQ34700033 ER PT J AU TANG, K ALLMAN, SL JONES, RB CHEN, CH AF TANG, K ALLMAN, SL JONES, RB CHEN, CH TI QUANTITATIVE-ANALYSIS OF BIOPOLYMERS BY MATRIX-ASSISTED LASER-DESORPTION SO ANALYTICAL CHEMISTRY LA English DT Letter C1 OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831. RI Allman, Steve/A-9121-2011; Tang, Kai/A-2194-2011 OI Allman, Steve/0000-0001-6538-7048; NR 10 TC 84 Z9 85 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD AUG 1 PY 1993 VL 65 IS 15 BP 2164 EP 2166 DI 10.1021/ac00063a041 PG 3 WC Chemistry, Analytical SC Chemistry GA LQ347 UT WOS:A1993LQ34700041 ER PT J AU CLARK, TR BALDI, F OLSON, GJ AF CLARK, TR BALDI, F OLSON, GJ TI COAL DEPYRITIZATION BY THE THERMOPHILIC ARCHAEON METALLOSPHAERA-SEDULA SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID THIOBACILLUS-FERROOXIDANS; MICROBIAL DESULFURIZATION; PYRITE OXIDATION; GEN-NOV; ARCHAEBACTERIA; SULFOLOBUS; OXYGEN AB The kinetics of pyrite oxidation by Metallosphaera sedula were investigated with mineral pyrite and two coals with moderate (Pittsburgh no. 8) and high (New Brunswick, Canada) pyritic sulfur content. M. sedula oxidized mineral pyrite at a greater rate than did another thermophile, Acidianus brierleyi, or a mesophile, Thiobacillus ferrooxidans. Maximum rates of coal depyritization were also greater with M. sedula, although the magnitude of biological stimulation above abiotic rates was notably less than with mineral pyrite. Coal depyritization appears to be limited by the oxidation of pyrite with ferric ions and not by the rate of biotic oxidation of ferrous iron, as evidenced by the maintenance of a high ratio of ferric to ferrous iron in solution by M. sedula. Significant precipitation of hydronium jarosite at elevated temperature occurred only with New Brunswick coal. C1 UNIV SIENA,DIPARTIMENTO BIOL AMBIENTALE,I-53100 SIENA,ITALY. RP CLARK, TR (reprint author), US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236, USA. NR 27 TC 24 Z9 24 U1 0 U2 0 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 AUG PY 1993 VL 59 IS 8 BP 2375 EP 2379 PG 5 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA LP835 UT WOS:A1993LP83500006 PM 16349006 ER PT J AU BOWMAN, JP JIMENEZ, L ROSARIO, I HAZEN, TC SAYLER, GS AF BOWMAN, JP JIMENEZ, L ROSARIO, I HAZEN, TC SAYLER, GS TI CHARACTERIZATION OF THE METHANOTROPHIC BACTERIAL COMMUNITY PRESENT IN A TRICHLOROETHYLENE-CONTAMINATED SUBSURFACE GROUNDWATER SITE SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID METHYLOSINUS-TRICHOSPORIUM OB3B; SOLUBLE METHANE MONOOXYGENASE; FATTY-ACID; OBLIGATE METHANOTROPHS; GENE; MINERALIZATION; IDENTIFICATION; METHYLOTROPHS; DEGRADATION; DIVERSITY AB Groundwater, contaminated with trichloroethylene (TCE) and tetrachloroethylene (PCE), was collected from 13 monitoring wells at Area M on the U.S. Department of Energy Savannah River Site near Aiken, S.C. Filtered groundwater samples were enriched with methane, leading to the isolation of 25 methanotrophic isolates. The phospholipid fatty acid profiles of all the isolates were dominated by 18:1omega8c (60 to 80%), a signature lipid for group II methanotrophs. Subsequent phenotypic testing showed that most of the strains were members of the genus Methylosinus and one isolate was a member of the genus Methylocystis. Most of the methanotroph isolates exhibited soluble methane monooxygenase (sMMO) activity. This was presumptively indicated by the naphthalene oxidation assay and confirmed by hybridization with a gene probe encoding the mmoB gene and by cell extract assays. TCE was degraded at various rates by most of the sMMO-producing isolates, whereas PCE was not degraded. Savannah River Area M and other groundwaters, pristine and polluted, were found to support sMMO activity when supplemented with nutrients and then inoculated with Methylosinus trichosporium OB3b. The maximal sMMO-specific activity obtained in the various groundwaters ranged from 41 to 67% compared with maximal rates obtained in copper-free nitrate mineral salts media. This study partially supports the hypothesis that stimulation of indigenous methanotrophic communities can be efficacious for removal of chlorinated aliphatic hydrocarbons from subsurface sites and that the removal can be mediated by sMMO. C1 UNIV TENNESSEE,CTR ENVIRONM BIOTECHNOL,DEPT MICROBIOL,KNOXVILLE,TN 37932. UNIV TENNESSEE,ECOL GRAD PROGRAM,KNOXVILLE,TN 37932. WESTINGHOUSE ELECT CORP,SAVANNAH RIVER LAB,ENVIRONM SCI SECT,AIKEN,SC 29808. RI Bowman, John/C-2414-2014; Hazen, Terry/C-1076-2012 OI Bowman, John/0000-0002-4528-9333; Hazen, Terry/0000-0002-2536-9993 NR 46 TC 74 Z9 76 U1 0 U2 10 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 AUG PY 1993 VL 59 IS 8 BP 2380 EP 2387 PG 8 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA LP835 UT WOS:A1993LP83500007 PM 8368829 ER PT J AU KEMP, PF LEE, S LAROCHE, J AF KEMP, PF LEE, S LAROCHE, J TI ESTIMATING THE GROWTH-RATE OF SLOWLY GROWING MARINE-BACTERIA FROM RNA-CONTENT SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID ESCHERICHIA-COLI; DNA; ORGANISMS; COMMUNITY; CELLS AB In past studies of enteric bacteria such as Escherichia coli, various measures of cellular RNA content have been shown to be strongly correlated with growth rate. We examined this correlation for four marine bacterial isolates. Isolates were grown in chemostats at four or five dilution rates, yielding growth rates that spanned the range typically determined for marine bacterial communities in nature (mu = 0.01 to 0.25 h-1). All measures of RNA content (RNA cell-1, RNA:biovolume ratio, RNA:DNA ratio, RNA:DNA:biovolume ratio) were significantly different among isolates. Normalizing RNA content to cell volume substantially reduced, but did not eliminate, these differences. On average, the correlation between mu and the RNA:DNA ratio accounted for 94% of variance when isolates were considered individually. For data pooled across isolates (analogous to an average measurement for a community), the ratio of RNA:DNA mum-3 (cell volume) accounted for nearly half of variance in mu (r2 = 0.47). The maximum RNA:DNA ratio for each isolate was extrapolated from regressions. The regression of (RNA-DNA)/(RNA:DNA)max on mu was highly significant (r2 = 0.76 for data pooled across four isolates) and virtually identical for three of the four isolates, perhaps reflecting an underlying common relationship between RNA content and growth rate. The dissimilar isolate was the only one derived from sediment. Cellular RNA content is likely to be a useful predictor of growth rate for slowly growing marine bacteria but in practice may be most successful when applied at the level of individual species. RP KEMP, PF (reprint author), BROOKHAVEN NATL LAB,DIV OCEANOG & ATMOSPHER SCI,UPTON,NY 11973, USA. RI Kemp, Paul/G-2291-2011 OI Kemp, Paul/0000-0001-8947-4349 NR 24 TC 228 Z9 234 U1 0 U2 24 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 AUG PY 1993 VL 59 IS 8 BP 2594 EP 2601 PG 8 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA LP835 UT WOS:A1993LP83500037 PM 16349018 ER PT J AU MOROSIN, B XIANG, XD FUHRER, M ZETTL, A AF MOROSIN, B XIANG, XD FUHRER, M ZETTL, A TI STRUCTURAL-PROPERTIES OF VAPOR-GROWN C(60) CRYSTALS SO APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING LA English DT Article ID C-60 SINGLE-CRYSTALS; C60 AB Vapor grown crystals of C60 with thin flat triangular, rhombic or trapezoidal shapes of size to 1 x 2 x approximately 0.001 mm as well as prismastic crystals typically 0.5 x 0.4 x 0.2 mm have been grown using a high temperature vapor transport method. Room temperature X-ray precession photography shows these crystals exhibit diffraction patterns consistent with those for either (a) single or (b) twinned crystals of the previously reported face-centered cubic structure or (c) a more complex cell of hexagonal symmetry with a=10.010(2) angstrom and c=49.064(11)angstrom. This latter form actually is a multiple twin containing both the face-centered cubic and the close-packed hexagonal structure types. The sharp diffraction maxima for either the single or the twinned crystals demonstrate that they consist of large coherent domains and are essentially free of planar defects parallel to the twin planes. C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720. RP MOROSIN, B (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. RI Fuhrer, Michael/E-7634-2010; Xiang, Xiaodong/A-9445-2012; Zettl, Alex/O-4925-2016; Xiang, Xiaodong/A-5936-2017 OI Fuhrer, Michael/0000-0001-6183-2773; Zettl, Alex/0000-0001-6330-136X; NR 15 TC 3 Z9 3 U1 0 U2 2 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0947-8396 J9 APPL PHYS A-MATER JI Appl. Phys. A-Mater. Sci. Process. PD AUG PY 1993 VL 57 IS 2 BP 171 EP 174 DI 10.1007/BF00331440 PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LU685 UT WOS:A1993LU68500011 ER PT J AU FIROUZBAKHT, ML SCHLYER, DJ GATLEY, SJ WOLF, AP AF FIROUZBAKHT, ML SCHLYER, DJ GATLEY, SJ WOLF, AP TI A CRYOGENIC SOLID TARGET FOR THE PRODUCTION OF [F-18] FLUORIDE FROM ENRICHED [O-18]CARBON DIOXIDE SO APPLIED RADIATION AND ISOTOPES LA English DT Article ID O-18 WATER TARGET; F-18 FLUORIDE AB A new target design is described for the production of fluorine-18 in the chemical form of fluoride. The target is conical in shape with a cooling block extending radially. The target material is oxygen- 18 enriched carbon dioxide gas which is frozen onto the cooled surface. The rear of the cone and cooling block are surrounded by a bath of liquid nitrogen. The use of (CO2)-O-18 in place of (H2O)-O-18 as a target material increases the recovery efficiency and thus reduces the amount lost in each irradiation. After irradiation, 99% of the enriched ps was recovered by warming the target and cryogenically transferring the gas into a storage bulb. After transfer, the fluoride was rinsed from the target surface with water. The production from this target was 90-140 mCi/muA at saturation. The chemical form of fluoride has been verified by ion chromatography and the reactivity has been verified by use in the synthesis of FDG. This target is superior to the oxygen-18 enriched water target in the efficiency of recovery of the enriched target material which in turn reduces the cost of each irradiation. C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. NR 14 TC 7 Z9 7 U1 0 U2 0 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 AUG PY 1993 VL 44 IS 8 BP 1081 EP 1084 DI 10.1016/0969-8043(93)90109-N 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 LP908 UT WOS:A1993LP90800001 ER PT J AU ROSENZWEIG, Z YEUNG, ES AF ROSENZWEIG, Z YEUNG, ES TI LASER-BASED DOUBLE-BEAM THERMAL LENS DETECTOR FOR MICROCOLUMN LIQUID-CHROMATOGRAPHY SO APPLIED SPECTROSCOPY LA English DT Article DE PHOTOTHERMAL SPECTROSCOPY; LASERS; LIQUID CHROMATOGRAPHIC DETECTOR; ABSORPTION SPECTROMETRY ID CALORIMETRY AB A double-beam laser absorption detection system for high-performance liquid chromatography (HPLC) using the thermal lens effect has been developed. An electronic circuit is used to reduce the background noise level. The circuit is based on direct subtraction of reference and signal photocurrents under feedback control. A practical intensity signal-to-noise (S/N) ratio of 5 x 10(-6) for normal absorption and 1 x 10(-5) for thermal lens absorption measurements is achieved. The thermal-lens enhancement per unit laser power is 0.62 mW-1. For a 34-mW beam power at the sample cell, the absorption signal is 22 times higher in comparison to normal absorption. The system is shown to have a noise level of 2 x 10(-7) AU. Amounts as low as 1 x 10(-10) M 2'-(Cl-4-dimethylaminoazobenzene at the flow cell or 1.5 fmol injected can be detected (S/N = 3). This corresponds to a 10-fold improvement in comparison to normal absorption measurements with the same electronic canceller and a 100-fold improvement in comparison to those for commercial absorption detectors. C1 US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 25 TC 22 Z9 22 U1 1 U2 1 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD AUG PY 1993 VL 47 IS 8 BP 1175 EP 1179 DI 10.1366/0003702934068044 PG 5 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA LU098 UT WOS:A1993LU09800015 ER PT J AU MULLINS, OC MITRAKIRTLEY, S VANELP, J CRAMER, SP AF MULLINS, OC MITRAKIRTLEY, S VANELP, J CRAMER, SP TI MOLECULAR-STRUCTURE OF NITROGEN IN COAL FROM XANES SPECTROSCOPY SO APPLIED SPECTROSCOPY LA English DT Article DE X-RAY ABSORPTION SPECTROSCOPY ID RAY ABSORPTION-SPECTROSCOPY; PETROLEUM ASPHALTENES; ORGANIC SULFUR; IDENTIFICATION; FORMS AB Five major nitrogen chemical structures, present in coals of varying ranks, have been quantitatively determined with the use of nitrogen x-ray absorption near-edge spectroscopy (XANES). Similar studies of the sulfur chemical structures of coals have been performed for the last ten years; nitrogen studies on these fossil-fuel samples have only recently been realized. XANES spectra of coals exhibit several distinguishable resonances which can be correlated with characteristic resonances of particular nitrogen chemical structures, thereby facilitating analysis of these complicated systems. Many model compounds have been examined; for some, the relative peak positions are explained in terms of the orbital description of the lone pair of electrons. All features in the XANES spectra of coals have been accounted for; thus, all the major structural groups of nitrogen present in coals have been determined. A wide variety of aromatic nitrogen compounds is found in the coals; no evidence of saturated amine is found. Pyrroles, pyridines, pyridones, and aromatic amines are found in coal; of these, pyrrolic structures are the most prevalent. Pyridine nitrogen is prevalent in all except low-rank coals. The low pyridine content in low-rank (high-oxygen) coals correlates with a large pyridone content. This observation suggests that, with increasing maturation of coal, the pyridone loses its oxygen and is transformed into pyridine. Aromatic amines are present at low levels in coals of all rank. The spectral effects of aromatic amines are shown by comparing the XANES spectra of coal and petroleum asphaltenes. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF DAVIS,DAVIS,CA 95616. RP MULLINS, OC (reprint author), SCHLUMBERGER DOLL RES CTR,RIDGEFIELD,CT 06877, USA. NR 28 TC 51 Z9 53 U1 2 U2 9 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA PO BOX 1438, FREDERICK, MD 21701 SN 0003-7028 J9 APPL SPECTROSC JI Appl. Spectrosc. PD AUG PY 1993 VL 47 IS 8 BP 1268 EP 1275 DI 10.1366/0003702934067991 PG 8 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA LU098 UT WOS:A1993LU09800031 ER PT J AU DAI, S MAMANTOV, G COFFIELD, JE BEGUN, GM YOUNG, JP AF DAI, S MAMANTOV, G COFFIELD, JE BEGUN, GM YOUNG, JP TI ACCURATE PROCEDURE FOR DETERMINING THE CALIBRATION CURVE OF HIGH-TEMPERATURE MOLTEN-SALT SYSTEMS VIA RAMAN-SPECTROSCOPY SO APPLIED SPECTROSCOPY LA English DT Note DE MOLTEN SALT, CALIBRATION; FIBER OPTICS; RAMAN SPECTROSCOPY ID SPECTRA; MELTS; CELL C1 OAK RIDGE NATL LAB, DIV ANALYT CHEM, OAK RIDGE, TN 37831 USA. UNIV TENNESSEE, DEPT CHEM, KNOXVILLE, TN 37996 USA. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 11 TC 4 Z9 4 U1 1 U2 2 PU SOC APPLIED SPECTROSCOPY PI FREDERICK PA 5320 SPECTRUM DRIVE SUITE C, FREDERICK, MD 21703 USA SN 0003-7028 EI 1943-3530 J9 APPL SPECTROSC JI Appl. Spectrosc. PD AUG PY 1993 VL 47 IS 8 BP 1286 EP 1288 DI 10.1366/0003702934067829 PG 3 WC Instruments & Instrumentation; Spectroscopy SC Instruments & Instrumentation; Spectroscopy GA LU098 UT WOS:A1993LU09800034 ER PT J AU NAKAZAWA, M SOMORJAI, GA AF NAKAZAWA, M SOMORJAI, GA TI ADSORPTION OF SUBSTITUTED BENZENES ON POLYCRYSTALLINE GOLD AND ON ZINC-OXIDE AND IRON-OXIDE OVERLAYERS SO APPLIED SURFACE SCIENCE LA English DT Article ID MONOSUBSTITUTED BENZENES; POLAR SURFACES; FORMIC-ACID; METHANOL; ZNO; DECOMPOSITION; SPECTROSCOPY; FORMALDEHYDE; ELECTRODES; OXIDATION AB Adsorption of a series of substituted benzenes were investigated by temperature-programmed desorption (TPD) on gold, zinc oxide and iron oxide surfaces in order to elucidate the role of the substituents in the chemical bonding to these surfaces. It was found that gold interacts via the benzene ring when in contact with the aromatic molecules which have electron-donating substituents while it bonds via the substituents with the aromatic molecules which have the electron-withdrawing substituents. The interactions of oxides with substituted benzenes depended not only on the electron-donating ability of the substituents but also on the electron-accepting ability or the acidity of the oxides relative to the acidity of the substituted benzenes. When oxides were more acidic than the aromatic compounds adsorbed, the interactions were via the benzene ring, and the more electron donating the substituents, the stronger the bond, just as in the case of the adsorption on gold. When oxides were less acidic than the aromatic molecules adsorbed, however, the bonding was through the acid centers of the substituents and the adsorptions were dissociative. Zinc oxide was found to be less acidic than acetophenone and benzaldehyde while iron oxide was more acidic than these compounds. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,CTR ADV MAT,BERKELEY,CA 94720. NIPPON STEEL CORP LTD,BUR TECH DEV,SURFACE TREATMENT RES LAB,FUTTSU,CHIBA 29912,JAPAN. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 44 TC 25 Z9 25 U1 1 U2 10 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 AUG PY 1993 VL 68 IS 4 BP 517 EP 537 DI 10.1016/0169-4332(93)90235-4 PG 21 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA LP807 UT WOS:A1993LP80700011 ER PT J AU NAKAZAWA, M SOMORJAI, GA AF NAKAZAWA, M SOMORJAI, GA TI A STUDY OF THE ADSORPTION OF SELECTED ORGANIC-MOLECULES TO MODEL THE ADHESION OF EPOXY-RESINS - THERMAL-DESORPTION OF GLYCIDYL AND PHENOXY COMPOUNDS FROM GOLD, IRON-OXIDE AND ZINC-OXIDE SO APPLIED SURFACE SCIENCE LA English DT Article ID SURFACE AB The adsorption of oligomeric model compounds of the bis-phenol A epoxy resin was studied on gold, zinc oxide and iron oxide by temperature programmed desorption (TPD) in order to elucidate the relative importance of the four possible adsorption sites. Glycidyl 2-methylphenyl ether and 2-phenoxy ethanol were selected as the model compounds. It was found that the interactions of the model compounds with gold was primarily via the benzene ring, and the heat of desorption was 100-110 kJ/mol. On iron oxide, the model compounds dissociated by C-O bond and O-H bond scission. The surface interactions were via the phenoxy and hydroxyl oxygens, and the heat of desorption was 130-140 kJ/mol. On zinc oxide, the heats of adsorption were somewhat less than on iron oxide. Glycidyl 2-methylphenyl ether interacted mainly via the benzene ring and partly via the epoxy ring while 2-phenoxy ethanol interacted via phenoxy and hydroxyl oxygens. Their heats of desorption were 70-100 and 120 kJ/mol, respectively. Based on these results, an adhesion mechanism of the epoxy resin was suggested. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,CTR ADV MAT,BERKELEY,CA 94720. NIPPON STEEL CORP LTD,BUR TECH DEV,SURFACE TREATMENT RES LAB,FUTTSU,CHIBA 29912,JAPAN. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. NR 16 TC 9 Z9 9 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 AUG PY 1993 VL 68 IS 4 BP 539 EP 555 DI 10.1016/0169-4332(93)90236-5 PG 17 WC Chemistry, Physical; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Chemistry; Materials Science; Physics GA LP807 UT WOS:A1993LP80700012 ER PT J AU FREDERICKSON, KS WHITE, WE WHEELAND, RG SLAUGHTER, DR AF FREDERICKSON, KS WHITE, WE WHEELAND, RG SLAUGHTER, DR TI PRECISE ABLATION OF SKIN WITH REDUCED COLLATERAL DAMAGE USING THE FEMTOSECOND-PULSED, TERAWATT TITANIUM-SAPPHIRE LASER SO ARCHIVES OF DERMATOLOGY LA English DT Article ID EXCIMER LASER; 193 NM; SELECTIVE PHOTOTHERMOLYSIS; PLASMA FORMATION; SINGLE EXPOSURE; CYTO-TOXICITY; UV-RADIATION; INDUCTION; TISSUE; MUTAGENICITY AB Background and Design: The precise ablation of skin was studied using an ultrashort-pulsed, high-intensity titanium-sapphire (Ti:Al2O3) laser capable of peak intensities of tens of terawatts (TW; 1 TW = 10(12) watts [W]) per square centimeter. Rat skin was exposed in vitro to femtosecond-pulsed Ti:Al2O3 laser radiation at 800 nm, while varying the number of pulses and the intensity up to 46 TW/cm2. Ablation was evaluated by monitoring the amount of tissue removed per pulse as a function of energy, and by light microscopic examination of damage to adjacent, nonirradiated tissue. Observations: Ablation depth per pulse was 0.1 mum at threshold intensity, and it was increased with both the energy per pulse and the number of pulses. Minimal damage to adjacent healthy tissue was observed, varying 0 to 30 mum. Conclusion: The results suggest that ablation of skin with femtosecond-pulsed, terawatt Ti:Al2O3 laser may have potential for precision cutaneous surgery, and in vivo studies are indicated. C1 UNIV CALIF DAVIS,SACRAMENTO MED CTR,DEPT DERMATOL,1605 ALHAMBRA BLVD,SACRAMENTO,CA 95817. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 36 TC 23 Z9 23 U1 0 U2 6 PU AMER MEDICAL ASSOC PI CHICAGO PA 515 N STATE ST, CHICAGO, IL 60610 SN 0003-987X J9 ARCH DERMATOL JI Arch. Dermatol. PD AUG PY 1993 VL 129 IS 8 BP 989 EP 993 DI 10.1001/archderm.129.8.989 PG 5 WC Dermatology SC Dermatology GA LR787 UT WOS:A1993LR78700007 PM 8352623 ER PT J AU COOPER, LW SOLIS, C KANE, DL HINZMAN, LD AF COOPER, LW SOLIS, C KANE, DL HINZMAN, LD TI APPLICATION OF O-18 TRACER TECHNIQUES TO ARCTIC HYDROLOGICAL PROCESSES SO ARCTIC AND ALPINE RESEARCH LA English DT Article ID HYDROGEN ISOTOPE RATIOS; SNOWMELT RUNOFF; PRECAMBRIAN SHIELD; STORM RUNOFF; WATER; BASIN; GROUNDWATER; CALIFORNIA; GENERATION; TERRAIN AB The deltaO-18 value of streamflow at Imnavait Creek, Alaska, shifted dramatically from -30.3 parts per thousand on 14 May, the first day of streamflow in 1990, to -22.5 parts per thousand on 22 May, at the end of the snowmelt. These results suggested a large degree of mixing between snow (deltaO-18 value = -27.6 parts per thousand +/- 1.6 SD) and underlying soil moisture (estimated deltaO-18 value = -20.6 parts per thousand). Nevertheless, independent hydrological measurements of snow redistribution by wind, snow ablation, snow and soil moisture content, and snowmelt runoff indicate there cannot be significant mixing of meltwater with underlying ice-rich soils. An alternative explanation is that isotopic fractionation during the phase change from solid to liquid dominates the isotopic variation in streamflow during snowmelt and prevents a straightforward application of O-18 as a conservative hydrological tracer. By contrast, under dry antecedent conditions in late summer, O-18 appeared to be a suitable tracer following rain contributions to streamflow. Streamflow increased as a result of rainfall, but stream isotopic composition did not change until at least two hours after streamflow increased, implicating a wave, or piston-like mechanism for forcing ''old'' water into the stream channel. Analyses of the stable hydrogen and oxygen isotope composition of various hydrological components within the watershed indicate the importance of evaporation as a dominant factor in the hydrological cycle; soil moisture, streamflow, permafrost, and the snowpack all showed varying degrees of isotopic alteration as a result of evaporation. Our analyses indicate that caution would be advised for any application of stable isotopes to hydrological studies in arctic watersheds. Proportions of snowmelt mixing with underlying soil water may be subject to overestimation because isotopic fractionation as snow melts can be similar in direction and magnitude to the isotopic mixing of snowmelt and soil waters. C1 UNIV ALASKA,INST NO ENGN,WATER RES CTR,FAIRBANKS,AK 99775. RP COOPER, LW (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,MS 6038,OAK RIDGE,TN 37831, USA. RI Hinzman, Larry/B-3309-2013; Cooper, Lee/E-5251-2012 OI Hinzman, Larry/0000-0002-5878-6814; Cooper, Lee/0000-0001-7734-8388 NR 40 TC 24 Z9 26 U1 3 U2 12 PU INST ARCTIC ALPINE RES PI BOULDER PA UNIV COLORADO, BOULDER, CO 80309 SN 0004-0851 J9 ARCTIC ALPINE RES JI Arct. Alp. Res. PD AUG PY 1993 VL 25 IS 3 BP 247 EP 255 DI 10.2307/1551821 PG 9 WC Environmental Sciences; Geography SC Environmental Sciences & Ecology; Geography GA LU324 UT WOS:A1993LU32400013 ER PT J AU MEIER, AK AF MEIER, AK TI FIELD PERFORMANCE OF RESIDENTIAL REFRIGERATORS SO ASHRAE JOURNAL-AMERICAN SOCIETY OF HEATING REFRIGERATING AND AIR-CONDITIONING ENGINEERS LA English DT Article RP MEIER, AK (reprint author), LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,BERKELEY,CA 94720, USA. NR 0 TC 3 Z9 3 U1 0 U2 1 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 AUG PY 1993 VL 35 IS 8 BP 36 EP & PG 0 WC Thermodynamics; Construction & Building Technology; Engineering, Mechanical SC Thermodynamics; Construction & Building Technology; Engineering GA LT755 UT WOS:A1993LT75500009 ER PT J AU KOWALSKI, MP CRUDDACE, RG SNYDER, WA FRITZ, GG ULMER, MP FENIMORE, EE AF KOWALSKI, MP CRUDDACE, RG SNYDER, WA FRITZ, GG ULMER, MP FENIMORE, EE TI SPARTAN-1 X-RAY OBSERVATIONS OF THE PERSEUS CLUSTER .3. THE DISTRIBUTION OF IRON IN THE INTRACLUSTER GAS SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXIES, ABUNDANCES; GALAXIES, CLUSTERING; INTERGALACTIC MEDIUM; X-RAYS, GALAXIES ID COMA CLUSTER; GALACTIC WINDS; GALAXIES; EINSTEIN; MATTER; ABUNDANCES; EVOLUTION; ELEMENTS; EXOSAT; CORE AB The Spartan 1 instrument has resolved the spatial and spectral distribution of the 1-10 keV X-ray emission from the Perseus cluster in a region extending 50' (1.6 Mpc) from the center. The data were fitted with a spherically symmetric three-dimensional model which included separate components for the cooling flow, the extended cluster emission, and a possible point source located at NGC 1275. A careful study has been made of the abundance distribution of iron as a function of radius. We confirm the existence of a gradient where the best-fit central abundance is 0.77(+0.30/-0.38) times the solar value and the linear gradient is -1.10(+0.89/-2.24) Mpc-1 (90% confidence for a single interesting parameter in both cases). Joint 90% confidence limits to the abundance parameters have been established, and the resulting limits to the abundance distribution have been applied to theoretical models of cluster structure and evolution. We find that our results are consistent with a gas-removal mechanism with enhanced efficiency at the cluster center such as ram-pressure stripping or thermal exaporation. Our results are also in agreement with cluster evolution models in which the initial density of primordial ps in the cluster formation region is high (greater-than-or-equal-to 10(28) g cm-3). The integrated mass of iron out to a radius of 1.6 Mpc is about 3 x 10(10) M., about 5 times smaller than that deduced from X-ray observations under the assumption of a constant abundance. C1 NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP KOWALSKI, MP (reprint author), USN,RES LAB,E O HULBURT CTR SPACE RES,CODE 7620,WASHINGTON,DC 20375, USA. NR 70 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 AUG 1 PY 1993 VL 412 IS 2 BP 489 EP 503 DI 10.1086/172937 PN 1 PG 15 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LN831 UT WOS:A1993LN83100004 ER PT J AU FRY, JN MELOTT, AL SHANDARIN, SF AF FRY, JN MELOTT, AL SHANDARIN, SF TI THE 3-POINT CORRELATION-FUNCTION IN AN ENSEMBLE OF 3-DIMENSIONAL SIMULATIONS SO ASTROPHYSICAL JOURNAL LA English DT Article DE METHODS; NUMERICAL ID SHANE-WIRTANEN CATALOG; NUMERICAL SIMULATIONS; DENSITY-FLUCTUATIONS; EXPANDING UNIVERSE; GALAXIES; BISPECTRUM; SPECTRUM AB We evaluate the three-point function in Fourier space for an ensemble of three-dimensional 128(3) numerical simulations with initial power spectra characterized by spectral index n = +1, 0, -1, -2, -3, with no high-frequency cutoff and with cutoff k(c) = 16 or k(c) = 4. To remove dependences on scale and on time, we present results as the reduced amplitude Q in the hierarchical model as a function of the dimensionless variable kd(rms), where d(rms) is the mean square displacement of a particle from its initial position. For scale-free initial conditions, there is no evolution in Q. For initial conditions with a cutoff, Q evolves until the scale of the cutoff is in the nonlinear regime; the results afterwards are no different from those with no initial cutoff. We are able to follow, for the first time, the transition from quasi-linear to nonlinear regimes. In the quasi-linear regime, our results agree well with gravitational perturbation theory predictions, including a marked dependence on the shape of the configuration. In the nonlinear regime, the value of Q for scale-invariant initial conditions is remarkably independent of evolution epoch, of scale, and of configuration shape, and depends on spectral index roughly as Q = 3/(3 + n). C1 UNIV CAMBRIDGE,INST ASTRON,CAMBRIDGE CB3 0HA,ENGLAND. UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. UNIV KANSAS,DEPT PHYS & ASTRON,LAWRENCE,KS 66045. RP FRY, JN (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BOX 500,BATAVIA,IL 60510, USA. NR 25 TC 38 Z9 38 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 AUG 1 PY 1993 VL 412 IS 2 BP 504 EP 512 DI 10.1086/172938 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LN831 UT WOS:A1993LN83100005 ER PT J AU DICKEL, JR EILEK, JA JONES, EM AF DICKEL, JR EILEK, JA JONES, EM TI RADIO-EMISSION FROM YOUNG SUPERNOVA-REMNANTS .2. EVOLUTION AND DEPENDENCE ON CHARACTERISTICS OF THE PROGENITOR AND THE EXTERNAL MEDIUM SO ASTROPHYSICAL JOURNAL LA English DT Article DE HYDRODYNAMICS; SUPERNOVAE REMNANTS ID NEBULAE AB During the evolution of a supernova remnant (SNR), some of the explosion energy is converted to relativistic electron energy at the shock front; and, to the extent that the circumstellar medium (CSM) is clumpy, turbulent dynamo processes associated with the growth of Rayleigh-Taylor (R-T) fingers convert explosion kinetic energy into magnetic field energy. Phenomenological descriptions of these processes have been incorporated into a one-dimensional, spherical hydrodynamics program. Input parameters used in the calculations included the explosion energy, the mean CSM density, and various characteristics of the clump CSM. In this paper the evolution of global properties such as total magnetic energy and luminosity are related to the input parameters through the use of power-law fits and heuristic scaling functions. The results show that, once an SNR reaches the Sedov phase of evolution, it evolves along a track parallel to the observed surface brightness (SIGMA)-diameter (D) relation for Galactic and Magellanic Cloud SNRs. We conclude that the observed range in surface brightness for a given diameter (a factor of about 30) is probably the result of variations in explosion energy (up to a factor of 8) and/or in the contrast between the mean CSM density and the peak density of individual clumps (up to a factor of 20). C1 LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545. NEW MEXICO INST MIN & TECHNOL,DEPT PHYS,SOCORRO,NM 87801. RP DICKEL, JR (reprint author), UNIV ILLINOIS,DEPT ASTRON,1002 W GREEN ST,URBANA,IL 61801, USA. NR 17 TC 10 Z9 10 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 AUG 1 PY 1993 VL 412 IS 2 BP 648 EP 663 DI 10.1086/172951 PN 1 PG 16 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LN831 UT WOS:A1993LN83100018 ER PT J AU IGLESIAS, CA ROGERS, FJ AF IGLESIAS, CA ROGERS, FJ TI RADIATIVE OPACITIES FOR CARBON-RICH AND OXYGEN-RICH MIXTURES SO ASTROPHYSICAL JOURNAL LA English DT Article DE ATOMIC DATA; ATOMIC PROCESSES; STARS, INTERIORS ID ROSSELAND MEAN OPACITIES; GIANT BRANCH STARS; SMALL CORE MASS; TABLES; INTERIOR; PROJECT AB Recent OPAL calculations have obtained significant differences in the Rosseland mean opacities compared with earlier Los Alamos work. These new opacities have had a favorable impact on several astrophysical problems, but the efforts have concentrated on hydrogen main-sequence stars or stellar envelopes. The present calculations consider carbon- and oxygen-rich mixtures. It is shown that for such mixtures the Coulomb corrections beyond the weak-coupling approximation are not negligible in the ionization-balance calculations when Rosseland mean opacities are computed. As for hydrogen-rich compositions, the hydrogen-depleted mixtures can show factors of 2-3 enhancements in the opacity compared with the Los Alamos results at temperatures of a few hundred thousand degrees. For temperatures above a million degrees there are opacity increases as well as decreases of approximately 20%, depending on density. Tables of Rosseland mean opacities are provided that allow accurate interpolation for compositions of arbitrary amounts of hydrogen, carbon, and oxygen. RP IGLESIAS, CA (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 42 TC 151 Z9 151 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD AUG 1 PY 1993 VL 412 IS 2 BP 752 EP 760 DI 10.1086/172958 PN 1 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LN831 UT WOS:A1993LN83100025 ER PT J AU INAGAKI, T YABUSHITA, S WADA, K ARAKAWA, ET AF INAGAKI, T YABUSHITA, S WADA, K ARAKAWA, ET TI THE ULTRAVIOLET-SPECTRA OF THIN EVAPORATED-FILMS OF CARBONACEOUS CHONDRITE SO ASTROPHYSICS AND SPACE SCIENCE LA English DT Article AB Absorption spectra in the visible to the near ultraviolet were measured on the Belgica chondrite B-7904 in a form of thin solid film made by the vacuum evaporation. The spectra obtained exhibit a sharp peak at 226 nm and a broad bump around 280nm. These features were found an*sing from the meteorite component FeS (troilite). The peak at 226 nm shows a doublet structure with the band-width considerably narrower than the 217.5 nm feature in the interstellar extinction. The absorption spectra obtained previously with the pulverized chondrites suspended in a liquid were also found reproducible by the pulverized FeS. C1 KYOTO UNIV,DEPT APPL MATH & PHYS,KYOTO 606,JAPAN. KYOTO UNIV,DEPT NUCL ENGN,KYOTO 606,JAPAN. OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831. RP INAGAKI, T (reprint author), OSAKA KYOIKU UNIV,DIV NAT SCI,OSAKA 543,JAPAN. NR 15 TC 1 Z9 1 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0004-640X J9 ASTROPHYS SPACE SCI JI Astrophys. Space Sci. PD AUG PY 1993 VL 206 IS 1 BP 111 EP 117 DI 10.1007/BF00658387 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LX308 UT WOS:A1993LX30800011 ER PT J AU BECK, CI ULRICH, T AF BECK, CI ULRICH, T TI BIOTECHNOLOGY IN THE FOOD-INDUSTRY - AN INVISIBLE REVOLUTION IS TAKING PLACE SO BIO-TECHNOLOGY LA English DT Article ID PLANTS; POTATO; FRUIT; WHEAT C1 INEL,OFF RES & TECHNOL APPLICAT,IDAHO FALLS,ID 83415. RP BECK, CI (reprint author), STRATECON,5215 MT VIEW RD,WINSTON SALEM,NC 27104, USA. NR 35 TC 14 Z9 14 U1 0 U2 1 PU NATURE PUBLISHING CO PI NEW YORK PA 345 PARK AVE SOUTH, NEW YORK, NY 10010-1707 SN 0733-222X J9 BIO-TECHNOL JI Bio-Technology PD AUG PY 1993 VL 11 IS 8 BP 895 EP & DI 10.1038/nbt0893-895 PG 0 WC Biotechnology & Applied Microbiology SC Biotechnology & Applied Microbiology GA LP977 UT WOS:A1993LP97700021 ER PT J AU LAMERDIN, JE CARRANO, AV AF LAMERDIN, JE CARRANO, AV TI AUTOMATED FLUORESCENCE-BASED RESTRICTION FRAGMENT ANALYSIS SO BIOTECHNIQUES LA English DT Article ID DNA-SEQUENCE ANALYSIS; MAP AB We describe a procedure for the automated analysis of DNA restriction fragments in an agarose gel matrix. The procedure is based upon simultaneously digesting DNA with restriction enzymes and ligating a fluorochrome-labeled linker to the cut ends. The fluorochrome-labeled restriction fragments are loaded on a horizontal agarose gel scanning system (Applied Biosystems Model 362 GENE SCANNER(TM) Fluorescent Fragment Analyzer) for electrophoresis and data analysis. Mobility parameters for DNA fragment migration and detection sensitivity for the instrument are described In addition, we demonstrate some unique applications, including electrophoresis and fragment size conversion of up to 72 cosmid restriction digests in 4 h, applicability of the system for subsequent DNA transfers and hybridizations, utility for establishing overlapping restriction maps of cosmids, and discrimination of restriction digest specific fragment ends following a double-digest protocol. RP LAMERDIN, JE (reprint author), LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,CTR HUMAN GENOME,L-452,7000 E AVE,LIVERMORE,CA 94550, USA. NR 20 TC 21 Z9 21 U1 1 U2 2 PU EATON PUBLISHING CO PI NATICK PA 154 E. CENTRAL ST, NATICK, MA 01760 SN 0736-6205 J9 BIOTECHNIQUES JI Biotechniques PD AUG PY 1993 VL 15 IS 2 BP 294 EP 301 PG 8 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA LQ808 UT WOS:A1993LQ80800025 PM 8373599 ER PT J AU CARR, DB AF CARR, DB TI AZIMUTH ESTIMATION CAPABILITIES OF THE ARCESS REGIONAL SEISMIC ARRAY SO BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA LA English DT Article ID SPARSE NETWORK; LOCATION; EVENTS AB The effect of local geology and noise conditions on the performance of a small regional array is investigated by comparing the regional P(n) backazimuth estimation capabilities of the ARCESS array in northern Norway to the NORESS array. A broadband frequency-wavenumber estimator was used to calculate backazimuths from the P(n) arrival for each of 203 regional events recorded at ARCESS while varying element spacing, frequency band, and time window. Most of the errors in backazimuth are less than 20' when appropriate parameter combinations are used, and mean backazimuth errors are close to zero. The best results are obtained using a 13-element configuration that has a 1.4 km aperture and a maximum station spacing of about 600 m. With the 1:3-element configuration and the data filtered to include frequencies between 3 and 10 Hz, the mean errors for the 203 event data set are less than 0.9-degrees, and S.D. are as small as 16.9-degrees. There are differences seen in the backazimuth estimation capabilities of ARCESS and NORESS with specific parameter combinations. The larger aperture configurations (10- and 17-elements) have smaller means at ARCESS, although the precision is about the same. The estimates using unfiltered data at ARCESS are poor, because of local noise conditions that increase the level of background noise at low frequencies. Overall the precision is better at NORESS, but both regional arrays have the best results using the 13-element configuration and filtering the data in the middle frequency range (3 to 10 Hz). Other factors investigated include SNR and source region. Backazimuth estimation statistics improve if only events with 5 dB of SNR are included in the data set at both ARCESS and NORESS. The mean errors move closer to zero and standard deviations decrease. The differences between the two arrays are not as pronounced. There are some path effects from different source regions around the ARCESS array. However, combinations of small aperture configurations and middle (3 to 10 Hz) frequency bands work well for events over the entire distance range of 30 to 1200 km. ARCESS and NORESS have similar backazimuth estimation capabilities even though there are differences in the local geology and noise conditions. Because a 13-element configuration produces reliable results for both arrays, it would be reasonable to reduce the number of elements in a regional array. This in turn will reduce the costs associated with building and deploying small regional arrays. RP CARR, DB (reprint author), SANDIA NATL LABS,DEPT SEISM VERIFICAT TECHNOL 9236,ALBUQUERQUE,NM 87185, USA. NR 19 TC 2 Z9 2 U1 0 U2 0 PU SEISMOLOGICAL SOC AMER PI EL CERRITO PA PLAZA PROFESSIONAL BLDG, SUITE 201, EL CERRITO, CA 94530 SN 0037-1106 J9 B SEISMOL SOC AM JI Bull. Seismol. Soc. Amer. PD AUG PY 1993 VL 83 IS 4 BP 1213 EP 1231 PG 19 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LN635 UT WOS:A1993LN63500013 ER PT J AU ROMANOWICZ, B RUNDLE, JB AF ROMANOWICZ, B RUNDLE, JB TI ON SCALING RELATIONS FOR LARGE EARTHQUAKES SO BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA LA English DT Note C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. UNIV CALIF BERKELEY, DEPT GEOL & GEOPHYS, BERKELEY, CA 94720 USA. RP UNIV CALIF BERKELEY, SEISMOG STN, BERKELEY, CA 94720 USA. NR 10 TC 65 Z9 66 U1 0 U2 2 PU SEISMOLOGICAL SOC AMER PI ALBANY PA 400 EVELYN AVE, SUITE 201, ALBANY, CA 94706-1375 USA SN 0037-1106 EI 1943-3573 J9 B SEISMOL SOC AM JI Bull. Seismol. Soc. Amer. PD AUG PY 1993 VL 83 IS 4 BP 1294 EP 1297 PG 4 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LN635 UT WOS:A1993LN63500018 ER PT J AU APEL, ML TORMA, AE AF APEL, ML TORMA, AE TI DETERMINATION OF KINETICS AND DIFFUSION-COEFFICIENTS OF METAL SORPTION ON CA-ALGINATE BEADS SO CANADIAN JOURNAL OF CHEMICAL ENGINEERING LA English DT Note DE BIOSORPTION KINETICS; MASS TRANSPORT; ALGINATE; METALS RECOVERY; DIFFUSION ID BIOSORPTION; URANIUM AB Efficiency of Ca-alginate beads in the removal of Ba2+, Cd2+, UO22+ and Zn2+ from aqueous solutions was evaluated. Effects of process variables (initial metal ion and calcium alginate concentrations, pH and temperature) on the kinetics of the biosorption process were assessed. The maximum rate of metal sorption, v(m), and the corresponding diffusion coefficient, D(M2+), were derived to be: [GRAPHICS] The apparent activation energy was derived from the Arrhenius plot to be 11.3 kJ/mol. This relatively low value of activation energy suggests that the biosorption process is diffusion controlled. C1 EG&G IDAHO INC,IDAHO NATL ENGN LAB,CTR ENVIRONM ASSESSEMENT,IDAHO FALLS,ID 83415. RP APEL, ML (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,CTR BIOPROC,IDAHO FALLS,ID 83415, USA. NR 25 TC 28 Z9 28 U1 0 U2 3 PU CANADIAN SOC CHEMICAL ENGINEERING PI OTTAWA PA 130 SLATER ST, STE 550, OTTAWA ON K1P 6E2, CANADA SN 0008-4034 J9 CAN J CHEM ENG JI Can. J. Chem. Eng. PD AUG PY 1993 VL 71 IS 4 BP 652 EP 656 PG 5 WC Engineering, Chemical SC Engineering GA LV218 UT WOS:A1993LV21800019 ER PT J AU LOVETT, GM LINDBERG, SE AF LOVETT, GM LINDBERG, SE TI ATMOSPHERIC DEPOSITION AND CANOPY INTERACTIONS OF NITROGEN IN FORESTS SO CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE LA English DT Article ID BALSAM FIR FORESTS; INFERENTIAL MEASUREMENT TECHNIQUES; CLOUD WATER DEPOSITION; DRY DEPOSITION; THROUGHFALL CHEMISTRY; DECIDUOUS FOREST; HARDWOOD FOREST; MAJOR IONS; NEW-YORK; PRECIPITATION AB Wet deposition of nitrogen compounds was measured and dry and cloud water deposition were estimated at 11 forested sites in North America and one site in Europe. Dry deposition was a significant pathway of N input to all the forests, averaging 46% of the total deposition. At most of these sites, NH4+ was the dominant form of fixed N in the air. but HNO3 vapor dominated the dry deposition of N. Coarse-particle deposition was often important, but fine-particle deposition usually contributed only a small amount of the dry-deposited N. The deposition rates of inorganic N, which ranged between 4.8 and 27 kg N.ha-1.year-1, were generally much higher than has been reported by other studies measuring only wet or bulk deposition. The highest deposition rates were at the high-elevation sites in the southeastern and northeastern United States and much of the deposition at these sites was attributed to cloud water. Throughfall and stemflow (TF + SF) flux was also measured at all sites, and the net canopy exchange (NCE = (TF + SF) - total deposition) was found to be negative (indicating consumption of N in the canopy) for NH4+ and NO3-, and positive (indicating canopy release) for organic N. Past reports of canopy release of NO3- can probably be attributed to washoff of dry-deposited NO3- species. Consumption of inorganic N in the canopy ranged from 1 to 12 kg N . ha-1.year-1, and was highest in the spruce and spruce-fir stands. When organic N was included in the canopy N balance, the net canopy uptake of N was generally <15% of the total system N requirement. Total N deposition was a linear function of wet deposition for low-elevation sites, and dry deposition was a linear function of the net throughfall flux for NO3-. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RP LOVETT, GM (reprint author), INST ECOSYSTEM STUDIES,BOX AB,MILLBROOK,NY 12545, USA. RI Lovett, Gary/H-3800-2013; OI Lovett, Gary/0000-0002-8411-8027 NR 78 TC 226 Z9 244 U1 6 U2 37 PU NATL RESEARCH COUNCIL CANADA PI OTTAWA PA RESEARCH JOURNALS, MONTREAL RD, OTTAWA ON K1A 0R6, CANADA SN 0045-5067 J9 CAN J FOREST RES JI Can. J. For. Res.-Rev. Can. Rech. For. PD AUG PY 1993 VL 23 IS 8 BP 1603 EP 1616 DI 10.1139/x93-200 PG 14 WC Forestry SC Forestry GA MA581 UT WOS:A1993MA58100012 ER PT J AU RAY, FA KRAEMER, PM AF RAY, FA KRAEMER, PM TI ITERATIVE CHROMOSOME MUTATION AND SELECTION AS A MECHANISM OF COMPLETE TRANSFORMATION OF HUMAN-DIPLOID FIBROBLASTS BY SV40-T ANTIGEN SO CARCINOGENESIS LA English DT Article ID LARGE T-ANTIGEN; HUMAN EPIDERMAL-KERATINOCYTES; BRONCHIAL EPITHELIAL-CELLS; HUMAN UROEPITHELIAL CELLS; EARLY REGION GENES; CO-60 GAMMA-RAYS; NEOPLASTIC TRANSFORMATION; SIMIAN VIRUS-40; SV40-TRANSFORMED HUMAN; MONOCLONAL-ANTIBODIES AB The acquisition of an extended lifespan and of neoplastic properties, including anchorage independence, ability to grow in low serum-containing media, morphological transformation, immortalization and tumorigenicity in nude mice were studied in 31 human fibroblast lineages transfected with plasmids containing the SV40 early genes. Plasmids were used that contained sequences for large T alone, or large T plus small t or large T plus small t plus the SV40 origin. Cells expressing large T antigen gradually acquired the ability to form colonies in low serum or to form anchorage-independent colonies. Large T antigen was sufficient to cause complete transformation to tumorigenicity if multi-step lineage evolution was obtained by prolonged serial passage and if in vivo progression was assisted by means of a gelatin sponge implantation technique. Cells derived from progressive tumors initiated in sponges showed enhanced tumorigenicity as measured by ability to obtain tumors without using sponges and with reduced latent period, higher incidence and with fewer cells inoculated. Multiple lineages, of human fibroblasts have been converted to tumorigenicity without additional treatments such as transfection with activated oncogenes or exposure to carcinogens. These data, taken in conjunction with earlier studies showing that T antigen causes chromosome mutation preceding and accompanying the accumulation of the neoplastic phenotype, suggests that the T protein drives the transformation process by acting as a mutagen and cells with growth advantages were selected for in vitro and in vivo. With the possible exception of morphological transformation, the presence or absence of genes for small t and the SV40 origin were not critical for the process. RP RAY, FA (reprint author), LOS ALAMOS NATL LAB,DIV LIFE SCI,MS M888,LOS ALAMOS,NM 87545, USA. NR 64 TC 25 Z9 25 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0143-3334 J9 CARCINOGENESIS JI Carcinogenesis PD AUG PY 1993 VL 14 IS 8 BP 1511 EP 1516 DI 10.1093/carcin/14.8.1511 PG 6 WC Oncology SC Oncology GA LT119 UT WOS:A1993LT11900004 PM 8353836 ER PT J AU WALTER, CA LU, JW BHAKTA, M MITRA, S DUNN, W HERBERT, DC WEAKER, FJ HOOG, T GARZA, P ADRIAN, GS KAMOLVARIN, N AF WALTER, CA LU, JW BHAKTA, M MITRA, S DUNN, W HERBERT, DC WEAKER, FJ HOOG, T GARZA, P ADRIAN, GS KAMOLVARIN, N TI BRAIN AND LIVER TARGETED OVEREXPRESSION OF O(6)-METHYLGUANINE DNA METHYLTRANSFERASE IN TRANSGENIC MICE SO CARCINOGENESIS LA English DT Article ID O-6-ALKYLGUANINE-DNA ALKYLTRANSFERASE ACTIVITY; HUMAN O6-METHYLGUANINE-DNA METHYLTRANSFERASE; METHYL-N-NITROSOUREA; O-6-METHYLGUANINE-DNA METHYLTRANSFERASE; ESCHERICHIA-COLI; RAT-LIVER; DEOXYRIBONUCLEIC-ACID; LYMPHOBLASTOID LINES; HUMAN TRANSFERRIN; RIBONUCLEIC-ACID AB O6-Methylguanine DNA methyltransferase (MGMT; EC 2.1.1.63) is an unusual DNA repair protein in that it directly and specifically repairs a premutagenic DNA lesion without involving other proteins. MGMT removes the alkyl group from O6-alkylguanine in DNA in a unique stoichiometric reaction by accepting the alkyl group on a cysteine residue. The intracellular level of MGMT varies among tissues and appears to be inversely correlated to tissue-specific tumorigenesis induced by monofunctional alkylating agents. Because MGMT acts in solo, genetic manipulation of its expression may provide valuable insight into its contribution to cellular resistance to alkylation toxicity and to tumor induction. The human MGMT full length cDNA has been fused with a portion of the human transferrin (TF) 5'-flanking region (TF/MGMT). Transgenic founder mice were produced carrying the TF/MGMT transgene and then bred to establish stable transgenic tines. Human MGMT transcripts were specifically expressed in abundance in transgenic brain and liver tissues. In vitro MGMT assays revealed approximately 150-fold and approximately 25-fold increases in MGMT activity in transgenic brain and liver extracts respectively. Western blot analysis confirmed that human MGMT protein is specifically synthesized in transgenic brain and liver tissues. C1 UNIV TEXAS,MED BRANCH,SEALY CTR MOLEC SCI,GALVESTON,TX 77555. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. CHULALONGKORN UNIV,FAC MED,DEPT BIOCHEM,BANGKOK 10330,THAILAND. RP WALTER, CA (reprint author), UNIV TEXAS,HLTH SCI CTR,DEPT CELLULAR & STRUCT BIOL,SAN ANTONIO,TX 78284, USA. FU NIA NIH HHS [AG00872] NR 57 TC 15 Z9 15 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0143-3334 J9 CARCINOGENESIS JI Carcinogenesis PD AUG PY 1993 VL 14 IS 8 BP 1537 EP 1543 DI 10.1093/carcin/14.8.1537 PG 7 WC Oncology SC Oncology GA LT119 UT WOS:A1993LT11900008 PM 8353838 ER PT J AU HENDERSON, CC CAHILL, PA KOWALCZYK, TC SINGER, KD AF HENDERSON, CC CAHILL, PA KOWALCZYK, TC SINGER, KD TI THERMAL, OPTICAL, AND NONLINEAR-OPTICAL PROPERTIES OF TETRAFLUORINATED DONOR-ACCEPTOR BENZENES SO CHEMISTRY OF MATERIALS LA English DT Note ID DIFFERENTIAL-OVERLAP TECHNIQUE; SEMIEMPIRICAL METHODS; STILBENE DERIVATIVES; INTERMEDIATE NEGLECT; AROMATIC-COMPOUNDS; OPTIMIZATION; SPECTROSCOPY; PARAMETERS; MOLECULES; 2ND C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. RI Singer, Kenneth/G-6553-2011 NR 19 TC 2 Z9 2 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD AUG PY 1993 VL 5 IS 8 BP 1059 EP 1060 DI 10.1021/cm00032a003 PG 2 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA LV465 UT WOS:A1993LV46500003 ER PT J AU SELBY, JV AUSTIN, MA NEWMAN, B ZHANG, D QUESENBERRY, CP MAYER, EJ KRAUSS, RM AF SELBY, JV AUSTIN, MA NEWMAN, B ZHANG, D QUESENBERRY, CP MAYER, EJ KRAUSS, RM TI LDL SUBCLASS PHENOTYPES AND THE INSULIN-RESISTANCE SYNDROME IN WOMEN SO CIRCULATION LA English DT Article DE INSULIN RESISTANCE; HYPERTENSION; HUMAN GENETICS; TWIN; LOW-DENSITY LIPOPROTEIN ID LOW-DENSITY LIPOPROTEINS; CORONARY-ARTERY DISEASE; DYSLIPIDEMIC HYPERTENSION; GLUCOSE-TOLERANCE; PARTICLE-SIZE; HEART-DISEASE; NHLBI TWIN; PATTERNS; RISK; HETEROGENEITY AB Background. Low-density lipoprotein (LDL) subclass phenotype B, characterized by predominance of small, dense LDL particles, is associated with elevated plasma triglycerides and apolipoprotein B and with lower high-density lipoprotein (HDL) cholesterol and apolipoprotein A-I. Because these abnormalities resemble the dyslipidemia of insulin resistance, we examined associations of LDL subclass phenotype with plasma insulin levels and with other aspects of the insulin resistance syndrome. Methods and Results. LDL subclass phenotypes were determined by gradient gel electrophoresis in 682 female twins aged 30 to 91 years who participated in the second examination of the Kaiser Permanente Women Twins Study. Prevalence of phenotype B and the intermediate phenotype (I) increased strongly with age, obesity, and non-insulin-dependent diabetes. In multivariate analysis of nondiabetic women, phenotype B or I was independently associated with each aspect of the insulin resistance syndrome, including higher plasma triglycerides, waist-hip ratio, fasting and postload insulin levels, and systolic blood pressure and lower HDL cholesterol levels after adjustment for age and body mass index. The prevalence of phenotype B or I rose progressively from 5.6% in women with no manifestations of the insulin resistance syndrome to 100% in women with four syndrome components. In 25 nondiabetic, monozygotic twin pairs discordant for subclass phenotype, the twins with phenotype B (or I) had significantly higher levels of body mass index, waist-hip ratio, and systolic blood pressure than their twins with phenotype A. Thus, nongenetic variation in these risk factors is important in explaining their associations with LDL subclass phenotype. Conclusions. Small, dense LDL is an integral feature of the insulin resistance syndrome. Nongenetic (ie, behavioral or environmental) factors are important for the expression of the phenotype and for its association with other heart disease risk factors. C1 UNIV N CAROLINA,SCH PUBL HLTH,DEPT EPIDEMIOL,CHAPEL HILL,NC 27514. LAWRENCE BERKELEY LAB,DONNER LAB,BERKELEY,CA 94720. UNIV WASHINGTON,SCH PUBL HLTH & COMMUNITY MED,DEPT EPIDEMIOL,SEATTLE,WA 98195. RP SELBY, JV (reprint author), KAISER PERMANENTE MED CARE PROGRAM,DIV RES,3451 PIEDMONT AVE,OAKLAND,CA 94611, USA. FU NHLBI NIH HHS [HL-38760, HL-41830] NR 31 TC 222 Z9 224 U1 0 U2 0 PU AMER HEART ASSOC PI DALLAS PA 7272 GREENVILLE AVENUE, DALLAS, TX 75231-4596 SN 0009-7322 J9 CIRCULATION JI Circulation PD AUG PY 1993 VL 88 IS 2 BP 381 EP 387 PG 7 WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease SC Cardiovascular System & Cardiology GA LR058 UT WOS:A1993LR05800008 PM 8339401 ER PT J AU DOWKER, HF AF DOWKER, HF TI SO(4)-INVARIANT STATES IN QUANTUM COSMOLOGY SO CLASSICAL AND QUANTUM GRAVITY LA English DT Article ID DESITTER SPACETIME; LINEARIZATION INSTABILITIES; EINSTEIN EQUATIONS; UNIVERSE AB The phenomenon of linearization instability is identified in models of quantum cosmology that are perturbations of mini-superspace models. In particular, constraints that are second-order in the perturbations must be imposed on wavefunctions calculated in such models. It is shown explicitly that in the case of a model which is a perturbation of the mini-superspace which has S3 spatial sections these constraints imply that any wavefunctions calculated in this model must be SO(4)-invariant. RP DOWKER, HF (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0264-9381 J9 CLASSICAL QUANT GRAV JI Class. Quantum Gravity PD AUG PY 1993 VL 10 IS 8 BP 1435 EP 1446 DI 10.1088/0264-9381/10/8/006 PG 12 WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LV474 UT WOS:A1993LV47400006 ER PT J AU PREISCHE, S MANICKAM, J JOHNSON, JL AF PREISCHE, S MANICKAM, J JOHNSON, JL TI A POSTPROCESSOR FOR THE PEST CODE SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article AB A new post-processor has been developed for use with output from the PEST tokamak stability code. It allows us to use quantities calculated by PEST and take better advantage of the physical picture of the plasma instability which they can provide. This will improve comparison with experimentally measured quantities as well as facilitate understanding of theoretical studies. C1 PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543. NR 2 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD AUG PY 1993 VL 76 IS 3 BP 318 EP 327 DI 10.1016/0010-4655(93)90059-L PG 10 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LR310 UT WOS:A1993LR31000005 ER PT J AU STANEK, R KILMER, J AF STANEK, R KILMER, J TI EVOLUTION OF CRYOGENIC SAFETY AT FERMILAB SO CRYOGENICS LA English DT Article; Proceedings Paper CT LTEC 92 - LOW TEMPERATURE ENGINEERING AND CRYOGENICS CONF : SAFETY IN THE DESIGN AND OPERATION OF LOW TEMPERATURE SYSTEMS CY JUL 13-15, 1992 CL SOUTHAMPTON, ENGLAND DE SAFETY; FERMILAB; POLICIES AB Over the past 25 years, Fermilab has been involved in cryogenic technology as it relates to pursuing experimentation in high energy physics. The Laboratory has instituted a strong cryogenic safety programme and has maintained a very positive safety record. The solid commitment of management and the cryogenic community to incorporating safety into the system life cycle has led to policies that set requirements and help establish consistency for the purchase and installation of equipment and safety analysis and documentation. RP STANEK, R (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 5 TC 0 Z9 0 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0011-2275 J9 CRYOGENICS JI Cryogenics PD AUG PY 1993 VL 33 IS 8 BP 809 EP 812 DI 10.1016/0011-2275(93)90192-Q PG 4 WC Thermodynamics; Physics, Applied SC Thermodynamics; Physics GA LN908 UT WOS:A1993LN90800010 ER PT J AU Gal, S Raikhel, NV AF Gal, Susannah Raikhel, Natasha V. TI Protein sorting in the endomembrane system of plant cells SO CURRENT OPINION IN CELL BIOLOGY LA English DT Article AB Although many properties of the targeting of plant endomembrane proteins are similar to mammalian and yeast systems, several clear differences are found that will be stressed in this review. In the past year, significant advances in our understanding of storage protein segregation in the endoplasmic reticulum, compartmentation of Golgi, and the signals for vacuolar protein targeting have been made. This work will form the basis for determining the mechanism of these sorting phenomena. C1 [Gal, Susannah; Raikhel, Natasha V.] Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA. RP Gal, S (reprint author), Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA. NR 31 TC 18 Z9 18 U1 0 U2 1 PU CURRENT BIOLOGY LTD PI LONDON PA 84 THEOBALDS RD, LONDON WC1X 8RR, ENGLAND SN 0955-0674 J9 CURR OPIN CELL BIOL JI Curr. Opin. Cell Biol. PD AUG PY 1993 VL 5 IS 4 BP 636 EP 640 DI 10.1016/0955-0674(93)90133-B PG 5 WC Cell Biology SC Cell Biology GA V26EA UT WOS:000208527700009 PM 8257605 ER PT J AU HAYMON, RM FORNARI, DJ VONDAMM, KL LILLEY, MD PERFIT, MR EDMOND, JM SHANKS, WC LUTZ, RA GREBMEIER, JM CARBOTTE, S WRIGHT, D MCLAUGHLIN, E SMITH, M BEEDLE, N OLSON, E AF HAYMON, RM FORNARI, DJ VONDAMM, KL LILLEY, MD PERFIT, MR EDMOND, JM SHANKS, WC LUTZ, RA GREBMEIER, JM CARBOTTE, S WRIGHT, D MCLAUGHLIN, E SMITH, M BEEDLE, N OLSON, E TI VOLCANIC-ERUPTION OF THE MIDOCEAN RIDGE ALONG THE EAST PACIFIC RISE CREST AT 9-DEGREES-45-52'N - DIRECT SUBMERSIBLE OBSERVATIONS OF SEA-FLOOR PHENOMENA ASSOCIATED WITH AN ERUPTION EVENT IN APRIL, 1991 SO EARTH AND PLANETARY SCIENCE LETTERS LA English DT Article ID DE-FUCA RIDGE; HYDROTHERMAL FLUIDS; MAGMA CHAMBER; LAVA FLOWS; JUAN; 9-DEGREES-30'N; 21-DEGREES-N; INDICATORS; CHEMISTRY; BEGGIATOA AB In April, 1991, we witnessed from the submersible Alvin a suite of previously undocumented seafloor phenomena accompanying an in-progress eruption of the mid-ocean ridge on the East Pacific Rise crest at 9-degrees-45'N-52'N. The volume of the eruption could not be precisely determined, although comparison of pre- and post-eruption SeaBeam bathymetry indicate that any changes in ridge crest morphology resulting from the eruption were < 10 m high. Effects of the eruption included: (1) increased abundance and redistribution of hydrothermal vents, disappearance of numerous vent communities, and changes in characteristics of vent fauna and mineral deposits within the eruption area since December, 1989; (2) murkiness of bottom waters up to tens of meters above the seafloor due to high densities of suspended mineral and biogenic particulates; (3) destruction of a vent community by lava flows, mass wasting, and possible hydrovolcanic explosion at a site known as 'Tubeworm Barbecue' in the axial summit caldera (ASC) at 9-degrees-50.6'N; (4) near-critical temperatures of hydrothermal vent fluids, ranging up to 403-degrees-C; (5) temporal variations over a 2 week interval in both temperatures and chemical/isotopic compositions of hydrothermal fluids; (6) unusual compositions of end-member vent fluids, with pH values ranging to a record low of 2.5, salinities ranging as low as 0.3 wt% NaCl (one-twelfth that of seawater), and dissolved gases reaching high concentrations (> 65 mmol/l for both CO2 and H2S); (7) venting at temperatures above 380-degrees-C of visually detectable white vapor that transformed to plumes of gray smoke a few centimeters above vent orifices; (8) disorganized venting of both high-temperature fluids (black and gray smoke) and large volumes of cooler, diffuse hydrothermal fluids directly from the basaltic seafloor, rather than from hydrothermal mineral constructions; (9) rapid and extensive growth of flocculent white bacterial mats (species unknown) on and under the seafloor in areas experiencing widespread venting of diffuse hydrothermal fluid: and (10) subseafloor downslope migration of magma normal to the ridge axis in a network of small-scale (1-5 m diameter) lava tubes and channels to distances at least 100-200 m outside the ASC. We suggest that, in April, 1991, intrusion of dikes in the eruption area to < 200 m beneath the ASC floor resulted in phase separation of fluids near the tops of the dikes and a large flux of vapor-rich hydrothermal fluids through the overlying rubbly, cavernous lavas. Low salinities and gas-rich compositions of hydrothermal fluids sampled in the eruption area are appropriate for a vapor phase in a seawater system undergoing subcritical liquid-vapor phase separation (boiling) and phase segregation. Hydrothermal fluids streamed directly from fissures and pits that may have been loci of lava drainback and/or hydrovolcanic explosions. These fissures and pits were lined with white mats of a unique fast-growing bacteria that was the only life associated with the brand-new vents. The prolific bacteria, which covered thousands of square meters on the ridge crest and were also abundant in subseafloor voids, may thrive on high levels of gases in the vapor-rich hydrothermal fluids initially escaping the hydrothermal system. White bacterial particulates swept from the seafloor by hydrothermal vents swirled in an unprecedented biogenic 'blizzard' up to 50 m above the bottom. The bacterial proliferation of April, 1991 is likely to be a transient bloom that will be checked quickly either by decline of dissolved gas concentrations in the fluids as rapid heat loss brings about cessation of boiling, and/or by grazing as other organisms are re-established in the biologically devastated area. C1 UNIV CALIF SANTA BARBARA,INST MARINE SCI,SANTA BARBARA,CA 93106. COLUMBIA UNIV,LAMONT DOHERTY EARTH OBSERV,PALISADES,NY 10964. MIT,DEPT EARTH ATMOSPHER & PLANETARY SCI,CAMBRIDGE,MA 02139. RUTGERS UNIV,INST MARINE & COASTAL SCI,NEW BRUNSWICK,NJ 08903. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. UNIV TENNESSEE,GRAD PROGRAM ECOL,KNOXVILLE,TN 37996. US GEOL SURVEY,RESTON,VA 22092. UNIV NEW HAMPSHIRE,DEPT EARTH SCI,DURHAM,NH 03824. UNIV WASHINGTON,SCH OCEANOG,SEATTLE,WA 98195. UNIV FLORIDA,DEPT GEOL,GAINESVILLE,FL 32611. RP HAYMON, RM (reprint author), UNIV CALIF SANTA BARBARA,DEPT GEOL SCI,SANTA BARBARA,CA 93106, USA. RI Wright, Dawn/A-4518-2011; Grebmeier, Jacqueline/L-9805-2013 OI Wright, Dawn/0000-0002-2997-7611; Grebmeier, Jacqueline/0000-0001-7624-3568 NR 57 TC 357 Z9 371 U1 4 U2 51 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0012-821X J9 EARTH PLANET SC LETT JI Earth Planet. Sci. Lett. PD AUG PY 1993 VL 119 IS 1-2 BP 85 EP 101 DI 10.1016/0012-821X(93)90008-W PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LV595 UT WOS:A1993LV59500007 ER PT J AU INGRAM, BL DEPAOLO, DJ AF INGRAM, BL DEPAOLO, DJ TI A 4300-YEAR STRONTIUM ISOTOPE RECORD OF ESTUARINE PALEOSALINITY IN SAN-FRANCISCO BAY, CALIFORNIA SO EARTH AND PLANETARY SCIENCE LETTERS LA English DT Article ID HIGH-PRECISION CALIBRATION; RADIOCARBON TIME SCALE; TREE RINGS; STRATIGRAPHY; OCEAN; LAKE; BC AB Strontium isotopic compositions of carbonate mollusk shells from estuarine sediments cored beneath San Francisco Bay are used to derive a record of mean annual salinity and average freshwater inflow to the estuary for intervals during the past 4300 yrs. The large difference in the Sr-87/Sr-86 ratio between seawater (0.7092) and the average freshwater entering the estuary (0.7065) produces a correlation between Sr-87/Sr-86 and salinity in bay waters that can be detected with high-precision measurements. Paleosalinity is inferred from the Sr-87/Sr-86 ratio measured in fossil carbonate shells of bivalves preserved in the sediment. Because salinity in San Francisco Bay is primarily controlled by the freshwater inflow from the Sacramento and San Joaquin rivers, the paleosalinity record can be converted to a paleodischarge record using a transfer function derived from historical data. Salinity data are referenced to modern values estimated for the estuary after correcting for the lower discharge caused by diversion since 1850 A.D. Data are presented from Richardson Bay, located near the estuary mouth (modern mear arrival salinity (MAS) of ca. 24 parts-per-thousand), and from San Pablo Bay, located about 30 km upstream (modern MAS of ca. 18-20 parts-per-thousand). For Richardson Bay, the data cover the periods 0-600 yrs B.P. and 2200-4300 yrs B.P., based on radiocarbon dating. For San Pablo Bay, the periods 0-130 yrs B.P. and 2500-2800 yrs B.P. are represented. The Richardson Bay data indicate extended periods of low salinity relative to modern, indicating higher freshwater inflow, at ca. 80, 220, 310, 440-500, 3100-3400 and 4300 yrs ago. The data indicate high salinity relative to modern, hence lower freshwater inflow, at about 40, 140-210, 270, 2100 and 3450-3700 yrs B.P. For San Pablo Bay, where salinity resolution is better, salinity was lower than modern during the period at ca. 50 and 2550-2650 yrs B.P., and higher than modern at ca 90-110, 155 and 2510-2530 yrs B.P. The data suggest that mean annual discharge to San Francisco Bay typically varies between values that are below the modern value (600 m3/s) and values 2 to 3 times as high; the average paleosalinity is typically substantially lower than the modern values. The 4300 yr average freshwater inflow is estimated to be greater-than-or-equal-to 1200 +/- 200 m3/s. The record indicates that quasi-cyclic variations in mean annual discharge occur naturally with a period of about 200 yrs or less. C1 LAWRENCE LIVERMORE NATL LAB,CTR ACCELERATOR MASS SPECTROMETRY,LIVERMORE,CA 94550. LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720. RP INGRAM, BL (reprint author), UNIV CALIF BERKELEY,DEPT GEOL & GEOPHYS,CTR ISOTOPE GEOCHEM,BERKELEY,CA 94720, USA. NR 37 TC 65 Z9 67 U1 2 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0012-821X J9 EARTH PLANET SC LETT JI Earth Planet. Sci. Lett. PD AUG PY 1993 VL 119 IS 1-2 BP 103 EP 119 PG 17 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LV595 UT WOS:A1993LV59500008 ER PT J AU ROSE, KA CHRISTENSEN, SW DEANGELIS, DL AF ROSE, KA CHRISTENSEN, SW DEANGELIS, DL TI INDIVIDUAL-BASED MODELING OF POPULATIONS WITH HIGH MORTALITY - A NEW METHOD BASED ON FOLLOWING A FIXED NUMBER OF MODEL INDIVIDUALS SO ECOLOGICAL MODELLING LA English DT Article AB Individual-based modeling of populations that undergo high mortality can be problematic. Large numbers of model individuals must be followed to ensure adequate numbers of survivors at the end of the simulation, but following large numbers of individuals can require excessive computer memory and computational time. Following a sample of individuals from the population partially addresses these problems for short-term simulations but not for model applications requiring long-term predictions. In this paper, we describe a resampling algorithm that permits the long-term simulation of populations undergoing high mortality. A fixed number of model individuals are followed, with each representing some number of identical population individuals. As each model individual dies, a donor individual is randomly selected from the survivors. The number of population individuals represented by the donor individual is adjusted to represent the loss of individuals due to mortality. The dead individual's attributes are then replaced with those of the donor individual. The high accuracy, reduced memory requirements, and comparable computational costs of the resampling algorithm are demonstrated using an individual-based population model of young-of-the-year striped bass. Differences between predictions without and with resampling were < 1.5% of the mean values for a suite of variables. Executable files for versions of the model using resampling were an order of magnitude smaller, and simulations required similar computational costs as versions of the model without resampling. Potential variations of the resampling algorithm to increase the accuracy of predictions of specific variables and to simulate spatially-explicit models are discussed. RP ROSE, KA (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. NR 8 TC 40 Z9 41 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3800 J9 ECOL MODEL JI Ecol. Model. PD AUG PY 1993 VL 68 IS 3-4 BP 273 EP 292 DI 10.1016/0304-3800(93)90022-K PG 20 WC Ecology SC Environmental Sciences & Ecology GA LR324 UT WOS:A1993LR32400010 ER PT J AU VERBRUGGE, MW BAKER, DR NEWMAN, J AF VERBRUGGE, MW BAKER, DR NEWMAN, J TI REACTION DISTRIBUTION IN A CORRODING PIT SO ELECTROCHIMICA ACTA LA English DT Article DE CONFORMAL MAPPING; PITTING CORROSION; MODELING; CURRENT DISTRIBUTION ID DISK ELECTRODE; CORROSION; MECHANISM; TRANSPORT AB An analysis of the reaction distribution over a corroding pit is presented. If the liquid-phase conductivity and the interfacial rate constants for the metal-dissolution reaction are known, the results of this secondary current distribution problem can be used to estimate the maximum rate of pit growth. The approach taken involves the conformal mapping of the pit geometry onto a new coordinate system; the finished transformation is shown to remove the singularity at the pit edge and provide a bounded region over which only a limited number of mesh points are required to perform accurate numerical analysis. Numerical calculations for the pit dissolution rate subject to linear and Tafel polarization are fitted to simple expressions; as a consequence, the results of this work can be used without having to resort to numerical methods. For the linear polarization analysis, the results are generalized in a manner that allows one to consider an arbitrary number of reactions on the pit surface. C1 GM CORP,DEPT MATH,WARREN,MI 48090. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP VERBRUGGE, MW (reprint author), GM CORP,RES,DEPT PHYS CHEM,WARREN,MI 48090, USA. RI Newman, John/B-8650-2008 OI Newman, John/0000-0002-9267-4525 NR 27 TC 16 Z9 16 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0013-4686 J9 ELECTROCHIM ACTA JI Electrochim. Acta PD AUG PY 1993 VL 38 IS 12 BP 1649 EP 1659 DI 10.1016/0013-4686(93)85055-4 PG 11 WC Electrochemistry SC Electrochemistry GA LP086 UT WOS:A1993LP08600008 ER PT J AU LANG, SW HUANG, YJ AF LANG, SW HUANG, YJ TI ENERGY-CONSERVATION STANDARD FOR SPACE HEATING IN CHINESE URBAN RESIDENTIAL BUILDINGS SO ENERGY LA English DT Article AB With the rapid growth of housing construction and increasing concerns about energy demand in the last decade, the Ministry of Construction released in 1987 a draft energy standard for new residential buildings in cities where central heating is required. The first half of this paper describes the current housing stock in China, its energy consumption, and the engineering methods and economic assumptions used to develop the energy standard. Since the Ministry's energy standard serves only as a general guideline on energy efficiency, as of 1991 most local governments were still in the process of writing detailed rules and regulations conforming to the basic standard. In the second part of the paper, we find that the steady-state calculational method of the Ministry standard agrees well with the results of dynamic DOE-2 building energy simulations, and we use the DOE-2 program to evaluate specific conservation measures proposed in the local Beijing version of the energy standard. C1 LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,ENERGY ANAL PROGRAM,1 CYCLOTRON RD,BERKELEY,CA 94720. CHINA ACAD BLDG RES,INST AIR CONDITIONING,BEIJING,PEOPLES R CHINA. NR 12 TC 8 Z9 8 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-5442 J9 ENERGY JI Energy PD AUG PY 1993 VL 18 IS 8 BP 871 EP 892 PG 22 WC Thermodynamics; Energy & Fuels SC Thermodynamics; Energy & Fuels GA LK306 UT WOS:A1993LK30600008 ER PT J AU LEE, RR STAUB, WP AF LEE, RR STAUB, WP TI ROLE OF SLOPE STABILITY IN CUMULATIVE IMPACT ASSESSMENT OF HYDROPOWER DEVELOPMENT - NORTH-CASCADES, WASHINGTON SO ENVIRONMENTAL GEOLOGY LA English DT Article DE HYDROPOWER DEVELOPMENT; SLOPE STABILITY; LANDSLIDES SEDIMENTATION AB Two environmental assessments considered the potential cumulative environmental impacts resulting from the development of eight proposed hydropower projects in the Nooksack River Basin and 11 proposed projects in the Skagit River Basin, North Cascades, Washington, respectively. While not identified as a target resource, slope stability and the alteration of sediment supply to creeks and river mainstems significantly affect other resources. The slope stability assessment emphasized the potential for cumulative impacts under disturbed conditions (e.g., road construction and timber harvesting) and a landslide-induced pipeline rupture scenario. In the case of small-scale slides, the sluicing action of ruptured pipeline water on the fresh landslide scarp was found to be capable of eroding significantly more material than the original landslide. For large-scale landslides, sluiced material was found to be a small increment of the original landslide. These results predicted that hypothetical accidental pipeline rupture by small-scale landslides may result in potential cumulative impacts for 12 of the 19 projects with pending license applications in both river basins. RP LEE, RR (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN, USA. NR 5 TC 0 Z9 0 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0177-5146 J9 ENVIRON GEOL JI Environ. Geol. PD AUG PY 1993 VL 21 IS 4 BP 212 EP 214 PG 3 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA LU757 UT WOS:A1993LU75700006 ER PT J AU KOONER, ZS AF KOONER, ZS TI COMPARATIVE-STUDY OF ADSORPTION BEHAVIOR OF COPPER, LEAD, AND ZINC ONTO GOETHITE IN AQUEOUS SYSTEMS SO ENVIRONMENTAL GEOLOGY LA English DT Article DE ADSORPTION; DISTRIBUTION COEFFICIENTS; LEAD; ZINC; COPPER; GOETHITE ID DESORPTION BEHAVIOR; SOLUTION INTERFACE; WATER; CD; ZN; SORPTION; CU; PB; ENVIRONMENT; CADMIUM AB The adsorption of lead(II) and zinc(II) onto goethite was studied as a function of pH, total dissolved metal concentration, surface area of goethite, and ionic strength. The results for zinc and lead were compared with those for copper reported earlier. The adsorption edge of lead ranges from pH 4 to 7, similar to that of copper, but the adsorption edge of zinc is displaced by 1.5 pH units toward higher pH. A fourfold increase in goethite surface area had a significant effect on the adsorption edge of lead, but a tenfold increase in the ionic strength of the medium did not affect the adsorption edge of lead and zinc. At neutral pH, 50 percent of the zinc was still available for transport and reactions in aqueous solution, whereas almost 100 percent of the lead and copper were bound to the goethite surface. The distribution coefficients increase sharply with the increase in pH and ranged from 60 to 30,000 ml/g in 2.5 pH units for lead and from 60 to 3000 ml/g in 1.5 pH units for zinc, depending on the goethite surface area and metal concentration. Distribution coefficients were used to calculate the number of protons released per mole of metal adsorbed during the adsorption process, with the average number of protons released per mole of lead and zinc adsorbed estimated to be 0.97 +/- 0.07 and 1.32 +/- 0.06, respectively. Proton coefficients of copper, lead, and zinc were correlated to their ionic radii and apparent equilibrium binding constant. Although the adsorption behavior of copper and lead were similar and both have the same charge, the drop in pH per mole of metal adsorbed is more in copper than in lead. RP KOONER, ZS (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. NR 23 TC 66 Z9 73 U1 0 U2 7 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0177-5146 J9 ENVIRON GEOL JI Environ. Geol. PD AUG PY 1993 VL 21 IS 4 BP 242 EP 250 PG 9 WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources SC Environmental Sciences & Ecology; Geology; Water Resources GA LU757 UT WOS:A1993LU75700011 ER PT J AU MEHOS, MS TURCHI, CS AF MEHOS, MS TURCHI, CS TI FIELD TESTING SOLAR PHOTOCATALYTIC DETOXIFICATION ON TCE-CONTAMINATED GROUNDWATER SO ENVIRONMENTAL PROGRESS LA English DT Article AB The Solar Detoxification Field Experiment was designed to investigate the photocatalytic decomposition of organic contaminants in groundwater at a Superfund site at Lawrence Livermore National Laboratory. The process uses ultraviolet (UV) energy available in sunlight in conjunction with a photocatalyst, titanium dioxide, to decompose organic chemicals into nontoxic compounds. The destruction mechanism, as in many other advanced oxidation processes, involves hydroxyl radicals. The field experiment was developed by three federal laboratories: the National Renewable Energy Laboratory, Sandia National Laboratory, and Lawrence Livermore National Laboratory. The United States Department of Energy funded the experiment. Groundwater at the test site was contaminated with trichloroethylene (TCE). A factorial test series examined four separate process variables: pH, catalyst loading, flow velocity, and solar intensity. Lowering the pH from pH 7 to pH 5 had the largest single effect, presumably by minimizing interference by bicarbonate. The catalyst was found to operate more efficiently at low, e.g. ambient sunlight, UV light levels. Information from these field tests suggest that treatment costs for the solar process would be similar to those for more conventional technologies. RP MEHOS, MS (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 0 TC 46 Z9 51 U1 0 U2 6 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0278-4491 J9 ENVIRON PROG JI Environ. Prog. PD AUG PY 1993 VL 12 IS 3 BP 194 EP 199 DI 10.1002/ep.670120308 PG 6 WC Engineering, Environmental; Engineering, Chemical; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LT614 UT WOS:A1993LT61400008 ER PT J AU YOUNG, RJ YEH, JT AF YOUNG, RJ YEH, JT TI COMPUTER-SIMULATION OF A FLUE-GAS DESULFURIZATION MOVING-BED REACTOR SO ENVIRONMENTAL PROGRESS LA English DT Article AB This paper describes the methodology of computer simulation of a moving-bed reactor system utilizing a gravity-fed solid reactant and a cross-flow of reacting gas. The objective of this work was to predict the efficiency of a moving-bed reactor for generic solid-gas reactions with known reaction rate parameters. Since in a continuous cross-flow-moving-bed reactor the solid reactant at the inlet of the reactor is fresh (or freshly regenerated) and the solid reactant can be almost totally utilized, the break-through of the reactant gas is much less at the reactor top (solid inlet) than at the bottom. The simulation provides predictions of the reactant gas break-through concentration profile as well as the bulk reactant gas consumption within the moving-bed reactor. The reactor performance is modeled by both one-dimensional and two-dimensional series of imaginary micro-reactors. The computer code is listed and a sample calculation is presented for a flue gas desulfurization process utilizing copper oxide impregnated on alumina as a sorbent. C1 US DOE,PITTSBURGH ENERGY TECHNOL CTR,POB 10940,PITTSBURGH,PA 15236. NR 0 TC 3 Z9 3 U1 0 U2 0 PU AMER INST CHEMICAL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0278-4491 J9 ENVIRON PROG JI Environ. Prog. PD AUG PY 1993 VL 12 IS 3 BP 200 EP 207 DI 10.1002/ep.670120309 PG 8 WC Engineering, Environmental; Engineering, Chemical; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LT614 UT WOS:A1993LT61400009 ER PT J AU BLAKE, RC CHOATE, DM BARDHAN, S REVIS, N BARTON, LL ZOCCO, TG AF BLAKE, RC CHOATE, DM BARDHAN, S REVIS, N BARTON, LL ZOCCO, TG TI CHEMICAL TRANSFORMATION OF TOXIC METALS BY A PSEUDOMONAS STRAIN FROM A TOXIC-WASTE SITE SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY LA English DT Article DE BIOREMEDIATION; TOXIC METALS; MERCURIC REDUCTASE; PSEUDOMONAS-MALTOPHILIA ID BACTERIAL ORGANOMERCURIAL LYASE; SILVER RESISTANCE; SP-NOV; MERCURIC REDUCTASE; HEAVY-METALS; GLUTATHIONE; MICROORGANISMS; REPRESENTS; OXIDATION; CHROMIUM AB Pseudomonas maltophilia strain O-2, isolated from soil at a toxic waste site in Oak Ridge, Tennessee, catalyzed the transformation and precipitation of numerous toxic metal cations and oxy-anions. When a viable inoculum (1%) of O-2 was introduced into nutrient broth containing Hg(II), Cr(VI), Se(IV), Pb(II), Au(III), Cd(II), Te(IV), or Ag(I), effective removal of the toxic metal was complete within 1, 1, 2, 2,2,4, 5, and 7 d, respectively. The NADPH-dependent reduction of Hg(II) to Hg0 was catalyzed by an inducible mercuric reductase. The reduction of selenite and tellurite to their insoluble elemental forms appeared to be mediated by an intracellular glutathione reductase that utilized the spontaneously formed bis(glutathio)Se(II) or bis(glutathio)Te(II), respectively, as pseudosubstrates. The three-electron reduction of hexavalent chromium was catalyzed by a membrane-bound chromate reductase. The enzymatic basis for the remaining metal transformations was not immediately apparent. It is anticipated that Pseudomonas maltophilia and related organisms could eventually be exploited for the removal of toxic metal wastes from selected, heavily polluted sites. C1 OAK RIDGE RES INST,OAK RIDGE,TN 37830. UNIV NEW MEXICO,DEPT BIOL,ALBUQUERQUE,NM 87131. LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545. RP BLAKE, RC (reprint author), MEHARRY MED COLL,DEPT BIOCHEM,NASHVILLE,TN 37208, USA. NR 55 TC 55 Z9 59 U1 1 U2 11 PU SETAC PRESS PI PENSACOLA PA 1010 NORTH 12TH AVE, PENSACOLA, FL 32501-3370 SN 0730-7268 J9 ENVIRON TOXICOL CHEM JI Environ. Toxicol. Chem. PD AUG PY 1993 VL 12 IS 8 BP 1365 EP 1376 DI 10.1897/1552-8618(1993)12[1365:CTOTMB]2.0.CO;2 PG 12 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA LP260 UT WOS:A1993LP26000006 ER PT J AU MEYERSSCHONE, L SHUGART, LR BEAUCHAMP, JJ WALTON, BT AF MEYERSSCHONE, L SHUGART, LR BEAUCHAMP, JJ WALTON, BT TI COMPARISON OF 2 FRESH-WATER TURTLE SPECIES AS MONITORS OF RADIONUCLIDE AND CHEMICAL CONTAMINATION - DNA-DAMAGE AND RESIDUE ANALYSIS SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY LA English DT Article DE BIOMONITORING; TURTLES; DNA DAMAGE; RADIONUCLIDES; MERCURY ID PSEUDEMYS-SCRIPTA; AQUATIC ORGANISMS; SNAPPING TURTLES; STRAND BREAKAGE; X-RAYS; RADIATION; EXPOSURE; ASSAY AB Two species of turtles that occupy different ecological niches were compared for their usefulness as monitors of freshwater ecosystems where both low-level radioactive and nonradioactive contaminants are present. The pond slider (Trachemys scripta) and common snapping turtle (Chelydra serpentina) were analyzed for the presence of Sr-90, Cs-137, Co-60, and Hg, radionuclides and chemicals known to be present at the contaminated site, and single-strand breaks in liver DNA. The integrity of the DNA was examined by the alkaline unwinding assay, a technique that detects strand breaks as a biological marker of possible exposure to genotoxic agents. This measure of DNA damage was significantly increased in both species of turtles at the contaminated site compared with turtles of the same species at a reference site, and shows that contaminant-''posed populations were under more severe genotoxic stress than those at the reference site. The level of strand breaks observed at the contaminated site was high and in the range reported for other aquatic species exposed to deleterious concentrations of genotoxic agents such as chemicals and ionizing radiation. Statistically significantly higher concentrations of radionuclides and Hg were detected in the turtles from the contaminated area. Mercury concentrations were significantly higher in the more carnivorous snapping turtle compared with the slider; however, both species were effective monitors of the contaminants. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831. UNIV TENNESSEE,GRAD PROGRAM ENVIRONM TOXICOL,KNOXVILLE,TN 37996. OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,OAK RIDGE,TN 37831. NR 29 TC 41 Z9 42 U1 1 U2 7 PU SETAC PRESS PI PENSACOLA PA 1010 NORTH 12TH AVE, PENSACOLA, FL 32501-3370 SN 0730-7268 J9 ENVIRON TOXICOL CHEM JI Environ. Toxicol. Chem. PD AUG PY 1993 VL 12 IS 8 BP 1487 EP 1496 DI 10.1897/1552-8618(1993)12[1487:COTFTS]2.0.CO;2 PG 10 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA LP260 UT WOS:A1993LP26000016 ER PT J AU ROOS, KR TRINGIDES, MC AF ROOS, KR TRINGIDES, MC TI FLUX DEPENDENCE OF THE AG/SI(111) GROWTH SO EUROPHYSICS LETTERS LA English DT Article DE LOW-ENERGY ELECTRON DIFFRACTION (LEED) AND REFLECTION HIGH-ENERGY ELECTRON DIFFRACTION (RHEED); THIN FILM GROWTH, STRUCTURE, AND EPITAXY; NUCLEATION ID METAL-FILM GROWTH; EPITAXIAL-GROWTH; OSCILLATIONS; TEMPERATURE; NUCLEATION; CU(100); CU AB We have studied the initial stages ((1 divided-by 2) ML) of the growth of Ag on Si(111) as a function of temperature T and deposition rate F to identify the operating diffusion mechanism. The specular beam intensity at 150 K shows short-lived oscillations which depend on the total amount of Ag deposited, irrespectively of the deposition rate, and suggest the absence of thermal diffusion at this low temperature. Growth studies at higher temperatures T greater-than-or-equal-to 473 K, monitoring the formation of the square-root 3 x square-root 3 R30-degrees structure as a function of deposition rate, measure a non-thermal component R0 > 50 angstrom to the diffusion length. The temperature dependence of the square-root 3 growth is used to measure an activation energy E(d) = (0.24 +/- 0.05) eV. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP ROOS, KR (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 18 TC 5 Z9 5 U1 0 U2 1 PU EDITIONS PHYSIQUE PI LES ULIS CEDEX PA Z I DE COURTABOEUF AVE 7 AV DU HOGGAR, BP 112, 91944 LES ULIS CEDEX, FRANCE SN 0295-5075 J9 EUROPHYS LETT JI Europhys. Lett. PD AUG 1 PY 1993 VL 23 IS 4 BP 257 EP 262 DI 10.1209/0295-5075/23/4/004 PG 6 WC Physics, Multidisciplinary SC Physics GA LT161 UT WOS:A1993LT16100004 ER PT J AU SEED, TM GOLTRY, K AF SEED, TM GOLTRY, K TI CHRONIC RADIATION-ASSOCIATED CYTOGENETIC/ONCOGENETIC ALTERATIONS IN DOGS WITH MYELOPROLIFERATIVE DISEASE SO EXPERIMENTAL HEMATOLOGY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CARDEN JENNINGS PUBL CO LTD PI CHARLOTTESVILLE PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 SN 0301-472X J9 EXP HEMATOL JI Exp. Hematol. PD AUG PY 1993 VL 21 IS 8 BP 1049 EP 1049 PG 1 WC Hematology; Medicine, Research & Experimental SC Hematology; Research & Experimental Medicine GA MW613 UT WOS:A1993MW61300147 ER PT J AU CARSTEN, AL AF CARSTEN, AL TI WHAT IS THE EVIDENCE THAT EXPOSURE TO LOW-FREQUENCY ELECTROMAGNETIC-FIELDS (EMFS) CAUSES CANCER SO EXPERIMENTAL HEMATOLOGY LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,UPTON,NY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU CARDEN JENNINGS PUBL CO LTD PI CHARLOTTESVILLE PA BLAKE CTR, STE 200, 1224 W MAIN ST, CHARLOTTESVILLE, VA 22903 SN 0301-472X J9 EXP HEMATOL JI Exp. Hematol. PD AUG PY 1993 VL 21 IS 8 BP 1104 EP 1104 PG 1 WC Hematology; Medicine, Research & Experimental SC Hematology; Research & Experimental Medicine GA MW613 UT WOS:A1993MW61300344 ER PT J AU IRDI, GA BOOHER, HB MARTELLO, DV FROMMELL, EA GRAY, RJ AF IRDI, GA BOOHER, HB MARTELLO, DV FROMMELL, EA GRAY, RJ TI THE PETROGRAPHY AND MINERALOGY OF 2 INDIAN COALS SO FUEL LA English DT Article DE MACERALS; MINERALS; COAL PETROGRAPHY AB Two coals, Kathara bituminous middlings from north-eastern India (Damodar Valley) and Neyveli lignite from south-eastern India (Tamil Nadu), were petrographically characterized. The Kathara sample is a high-ash coal produced in the beneficiation of a bituminous coking coal. It is relatively high in inertinite and mineral matter, with an unusually large amount of iron oxides in the form of hematite, magnetite and hydrated iron oxides. The Neyveli sample is relatively low in ash and sulfur, and consists mostly of the huminite group of macerals, with a considerable amount of liptinite also present. Low-temperature ashes and bottom ash samples of both coals were analysed by X-ray diffraction to help in interpreting the petrographic data. These coals were also tested for combustion characteristics. C1 RALPH GRAY SERV,MONROEVILLE,PA 15146. RP IRDI, GA (reprint author), US DOE,PITTSBURGH ENERGY TECHNOL CTR,POB 10940,PITTSBURGH,PA 15236, USA. NR 12 TC 4 Z9 4 U1 0 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0016-2361 J9 FUEL JI Fuel PD AUG PY 1993 VL 72 IS 8 BP 1093 EP 1098 DI 10.1016/0016-2361(93)90314-R PG 6 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LN474 UT WOS:A1993LN47400002 ER PT J AU CAO, YQ MONTANO, PA AF CAO, YQ MONTANO, PA TI IN-SITU X-RAY STUDIES OF CUO/AL2O3 SORBENTS REACTING WITH COAL FLUE-GAS SO FUEL LA English DT Article DE X-RAY; COAL FLUE GASES; COPPER SULFATES ID CU AB X-ray absorption fine structure (XAFS) spectroscopy was used to study the local structure around the Cu ion in CuO/Al2O3 sorbents in situ. The measurements were performed between room temperature and 400-degrees-C in a reaction cell with and without coal flue gas flow. Similar measurements were carried out using standard copper compounds. No significant changes were observed in the XAFS spectra of the sorbents when the measurements were performed in the presence of nitrogen. In contrast, new near-edge features appeared in the spectra of the sorbents in the presence of flue gas. A strong peak appeared at an energy characteristic of monovalent copper. No significant changes were detected in the Cu-O nearest-neighbour distance for any of the samples. The near-edge spectra were analysed to obtain the partial ratios of monovalent to divalent copper as a function of temperature and metal loading of the sorbents. The standard compounds showed no evidence of a reaction with the flue gas that might suggest the presence of monovalent copper. The present results indicate the complex nature of the reactions taking place on the Cu ion site during removal of SO2. The dominant phase after reaction gives the characteristic parameters of copper sulfates. C1 CUNY, GRAD CTR, NEW YORK, NY 10021 USA. ARGONNE NATL LAB, MSD, DIV MAT SCI, ARGONNE, IL 60439 USA. RP CAO, YQ (reprint author), CUNY BROOKLYN COLL, DEPT PHYS, BROOKLYN, NY 11210 USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0016-2361 J9 FUEL JI Fuel PD AUG PY 1993 VL 72 IS 8 BP 1125 EP 1129 DI 10.1016/0016-2361(93)90320-2 PG 5 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LN474 UT WOS:A1993LN47400008 ER PT J AU EDWARDS, CF FORNACIARI, NR DUNSKY, CM MARX, KD ASHURST, WT AF EDWARDS, CF FORNACIARI, NR DUNSKY, CM MARX, KD ASHURST, WT TI SPATIAL STRUCTURE OF A CONFINED SWIRLING FLOW USING PLANAR ELASTIC SCATTER IMAGING AND LASER-DOPPLER VELOCIMETRY SO FUEL LA English DT Article DE COMBUSTION FURNACE; FLAME; KINETICS ID BODY AB This paper reports the results of a study of the instantaneous spatial structure of a confined swirling flow after a sudden expansion. The flow chosen corresponds to the cold flow conditions of an axisymmetric laboratory-scale research furnace. The swirl number of the flow is 0.7 at the inlet plane and the expansion diameter ratio is 6:1. The flow has a centre hub-to-throat diameter ratio of 1:4. Data are reported for the instantaneous spatial structure of the flow via transient planar elastic scattering imaging. This technique allows for unambiguous visualization of the spatial structure of the flow by slicing through it with a thin sheet (approximately 1.5 mm) of light at various locations in the axial/radial and radial/azimuthal planes. By varying the time delay between introduction of the seeding material and data acquisition, features of the flow that would ordinarily be inaccessible are revealed. Laser Doppler velocimetry is used to measure the time-averaged and root mean square velocity components in all three coordinate directions. Using these data, we construct a model of the flow from the viewpoint of the vorticity fed into the flow and its subsequent dynamics. This viewpoint suggests different reasons for the development of the observable features of the flow and shows promise for helping to deconvolve the apparent complexity of this flowfield. RP EDWARDS, CF (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0016-2361 J9 FUEL JI Fuel PD AUG PY 1993 VL 72 IS 8 BP 1151 EP 1159 DI 10.1016/0016-2361(93)90324-U PG 9 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LN474 UT WOS:A1993LN47400012 ER PT J AU RETCOFSKY, HL AF RETCOFSKY, HL TI NOVEL ANALYTICAL TECHNIQUES FOR FOSSIL-FUELS - PREFACE SO FUEL LA English DT Editorial Material RP RETCOFSKY, HL (reprint author), US DOE,POB 10940,PITTSBURGH,PA 15236, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0016-2361 J9 FUEL JI Fuel PD AUG PY 1993 VL 72 IS 8 BP 1167 EP 1167 DI 10.1016/0016-2361(93)90326-W PG 1 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LN474 UT WOS:A1993LN47400014 ER PT J AU AILEYTRENT, KS MCGOWAN, CW LACHOWICZ, E MARKUSZEWSKI, R AF AILEYTRENT, KS MCGOWAN, CW LACHOWICZ, E MARKUSZEWSKI, R TI THE EFFECT OF TIME, ADDITIVES AND METHOD OF MEASUREMENT ON SULFATE DURING THE SELECTIVE OXIDATION OF COAL WITH PERCHLORIC-ACID SO FUEL LA English DT Article; Proceedings Paper CT SYMP ON NOVEL ANALYTICAL TECHNIQUES FOR FOSSIL FUELS, AT THE 202ND MEETING OF THE AMERICAN CHEMICAL SOC CY AUG 25-30, 1991 CL NEW YORK, NY SP AMER CHEM SOC, DIV FUEL CHEM DE OXIDATION DEGRADATION; PERCHLORIC ACID; SULFUR FORMS IN COAL ID OIL-SHALE; PRODUCTS AB A reaction scheme, developed at the Ames Laboratory, for the determination of the sulfur forms in coal takes advantage of the selective oxidizing power of perchloric acid. Sulfate, pyritic and organic sulfur are removed sequentially from a single sample of coal by solutions of perchloric acid boiling at 120, 155 and 205-degrees-C, respectively, and converted to sulfate for subsequent turbidimetric measurement. Work in this paper focused on improving the selectivity by trying to remove pyrite at lower temperatures and improving the low sulfur recoveries observed for some coals. The results indicated that pyritic sulfur can be removed at lower temperatures and that possibly two different forms of organic sulfur can be delineated. After several potential explanations for the low sulfur recoveries had been explored, a standard additions technique, when applied to the turbidimetric measurement of sulfate, alleviated the problem of low sulfur recoveries. C1 TENNESSEE TECHNOL UNIV,DEPT CHEM,COOKEVILLE,TN 38505. IOWA STATE UNIV SCI & TECHNOL,AMES LAB,FOSSIL ENERGY PROGRAM,AMES,IA 50011. NR 13 TC 0 Z9 0 U1 1 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0016-2361 J9 FUEL JI Fuel PD AUG PY 1993 VL 72 IS 8 BP 1197 EP 1201 DI 10.1016/0016-2361(93)90330-5 PG 5 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LN474 UT WOS:A1993LN47400018 ER PT J AU HAGAMAN, EW BURNS, JH AF HAGAMAN, EW BURNS, JH TI THE DETERMINATION OF LOCAL-STRUCTURE IN ORGANOFLUORIDES USING F-19 C-13 DIPOLAR COUPLING SO FUEL LA English DT Article; Proceedings Paper CT SYMP ON NOVEL ANALYTICAL TECHNIQUES FOR FOSSIL FUELS, AT THE 202ND MEETING OF THE AMERICAN CHEMICAL SOC CY AUG 25-30, 1991 CL NEW YORK, NY SP AMER CHEM SOC, DIV FUEL CHEM DE SOLID STATE NMR; DOUBLE CROSS POLARIZATION; ROTATIONAL ECHO DOUBLE RESONANCE ID CROSS-POLARIZATION NMR; ECHO DOUBLE-RESONANCE; SOLIDS AB H-1-F-19-C-13 double cross polarization (DCP)/magic angle spinning (MAS) C-13 n.m.r. and C-13-F-19 rotational echo double resonance (REDOR) CP/MAS C-13 n.m.r. experiments performed on two low-molecular-weight monofluorinated organic compounds are reported. DCP n.m.r. permits the selective identification of resonances of carbons one- and two-bonds removed from a fluorine atom in these substances. Under our experimental conditions the F-19 T2 is on the order of 1 ms or less. This relaxation process is beneficial in the DCP experiment. It defeats proper echo formation in C-13-F-19 REDOR CP/MAS C-13 n.m.r. experiments in which MAS speed and F-19(T2)-1 are comparable. Potential remains for REDOR in coal structure analysis under experimental conditions that result in lengthened F-19 T2. RP HAGAMAN, EW (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. NR 11 TC 13 Z9 13 U1 1 U2 4 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0016-2361 J9 FUEL JI Fuel PD AUG PY 1993 VL 72 IS 8 BP 1239 EP 1243 DI 10.1016/0016-2361(93)90336-Z PG 5 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LN474 UT WOS:A1993LN47400024 ER PT J AU FAULON, JL HATCHER, PG CARLSON, GA WENZEL, KA AF FAULON, JL HATCHER, PG CARLSON, GA WENZEL, KA TI A COMPUTER-AIDED MOLECULAR-MODEL FOR HIGH VOLATILE BITUMINOUS COAL SO FUEL PROCESSING TECHNOLOGY LA English DT Article; Proceedings Paper CT SYMP ON CHEMISTRY, STRUCTURE AND REACTIVITY OF COALS, TAR SANDS, AND OIL SHALE CY APR 08-10, 1992 CL SAN FRANCISCO, CA SP AMER CHEM SOC, DIV FUEL CHEM ID FORCE-FIELD; COALIFICATION; XYLEM; WOOD; NMR AB This study defines a three dimensional chemical representation of a coal macromolecule based on data from physiochemical analyses. Both atomic and molecular information is introduced in the computerized model (SIGNATURE Program). The atomic information includes elemental analysis and C-13 NMR data. The molecular information involves analyses of the pyrolysis products of the macromolecule. The components analyzed are molecular fragments of the coal and their structures are determined by gas chromatography/mass spectrometry. The main task of the program is to assemble these fragments to obtain a molecule which is consistent with the atomic information. The computerized method, based on a combinatorial program is able to compute one, several or all non-isomorphic models which can be built. An example of such an approach is presented for vitrinite from high volatile bituminous coal. The SIGNATURE program was used to construct one of the many possible structural isomers in three dimensions. An energy minimization program was subsequently applied to identify the structure as it might exist in it lowest energy conformation. The resulting model forms a reasonable representation in terms of energy, density, and number of cross-links. C1 SANDIA NATL LABS,DEPT FUEL SCI,ALBUQUERQUE,NM 87185. RP FAULON, JL (reprint author), PENN STATE UNIV,DEPT FUEL SCI,UNIV PK,PA 16802, USA. NR 25 TC 29 Z9 35 U1 1 U2 18 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-3820 J9 FUEL PROCESS TECHNOL JI Fuel Process. Technol. PD AUG PY 1993 VL 34 IS 3 BP 277 EP 293 DI 10.1016/0378-3820(93)90070-K PG 17 WC Chemistry, Applied; Energy & Fuels; Engineering, Chemical SC Chemistry; Energy & Fuels; Engineering GA LN584 UT WOS:A1993LN58400007 ER PT J AU DOLAN, TJ AF DOLAN, TJ TI FUSION POWER ECONOMY OF SCALE SO FUSION TECHNOLOGY LA English DT Article DE ECONOMY; SCALE; FUSION ID ENERGY AB In the next 50 yr, the world will need to develop hundreds of gigawatts of non-fossil-fuel energy sources for production of electricity and fuels. Nuclear fusion can probably pro vide much of the required energy economically, if large single-unit power plants are acceptable. Large power plants are more common than most people realize: There are already many multiple-unit power plants producing 2 to 5 GW(electric) at a single site. The cost of electricity (COE) from fusion energy is predicted to scale as COE almost-equal-to COE0(P/P0)-n, where P is the electrical power, the subscript zero denotes reference values, and the exponent n almost-equal-to 0. 36 to 0. 7 in various designs. The validity ranges of these scalings are limited and need to be extended by future work. The fusion power economy of scale derives from four interrelated effects: improved operations and maintenance costs, scaling of equipment unit costs; a geometric effect that increases the mass power density; and reduction of the recirculating power fraction. Increased plasma size also relaxes the required confinement parameters: For the same neutron wall loading, larger tokamaks can use lower magnetic fields. Fossil-fuel power plants have a weaker economy of scale than fusion because the fuel costs constitute much of their COE. Solar and wind power plants consist of many small units, so they have little economy of scale. Fission power plants have a strong economy of scale but are unable to exploit it because the maximum unit size is limited by safety concerns. Large, steady-state fusion reactors generating 3 to 6 GW(electric) may be able to produce electricity for 4 to 5 cent/k W.h, which would be competitive with other future energy sources. RP DOLAN, TJ (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 38 TC 7 Z9 7 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD AUG PY 1993 VL 24 IS 1 BP 97 EP 111 PG 15 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ225 UT WOS:A1993LQ22500008 ER PT J AU HIVELY, LM AF HIVELY, LM TI ANOMALOUS TOKAMAK TRANSPORT AND TURBULENCE CONTROL SO FUSION TECHNOLOGY LA English DT Letter ID CHAOS RP HIVELY, LM (reprint author), OAK RIDGE NATL LAB,POB 2003,OAK RIDGE,TN 37831, USA. NR 11 TC 1 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD AUG PY 1993 VL 24 IS 1 BP 127 EP 128 PG 2 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ225 UT WOS:A1993LQ22500012 ER PT J AU DOLAN, TJ AF DOLAN, TJ TI ION DEFOCUSING IN MULTICUSP PLASMA-CONFINEMENT SYSTEMS SO FUSION TECHNOLOGY LA English DT Letter RP DOLAN, TJ (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 2 TC 4 Z9 4 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0748-1896 J9 FUSION TECHNOL JI Fusion Technol. PD AUG PY 1993 VL 24 IS 1 BP 128 EP 129 PG 2 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ225 UT WOS:A1993LQ22500013 ER PT J AU TYNAN, K HOFFMAN, SMG TSUJIMOTO, S BRANDRIFF, B GORDON, L CARRANO, AV MOHRENWEISER, HW AF TYNAN, K HOFFMAN, SMG TSUJIMOTO, S BRANDRIFF, B GORDON, L CARRANO, AV MOHRENWEISER, HW TI ORGANIZATION OF THE MULTIPLE POLYMORPHIC SITES OF THE D19S11-LOCUS WITHIN A 650-KB COSMID CONTIG SO GENOMICS LA English DT Article ID FLUORESCENCE INSITU HYBRIDIZATION; INTERPHASE CELL-NUCLEI; HIGH-RESOLUTION; DNA-SEQUENCES; GENE; CHROMOSOME-19; LIBRARIES; CLUSTER; LOCUS C1 LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,BIOL & BIOTECHNOL RES PROGRAM L452,LIVERMORE,CA 94550. NR 21 TC 10 Z9 10 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD AUG PY 1993 VL 17 IS 2 BP 316 EP 323 DI 10.1006/geno.1993.1327 PG 8 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA LP815 UT WOS:A1993LP81500007 PM 8406482 ER PT J AU ROUQUIER, S GIORGI, D TRASK, B BERGMANN, A PHILLIPS, MS MACLENNAN, DH DEJONG, P AF ROUQUIER, S GIORGI, D TRASK, B BERGMANN, A PHILLIPS, MS MACLENNAN, DH DEJONG, P TI A COSMID AND YEAST ARTIFICIAL CHROMOSOME CONTIG CONTAINING THE COMPLETE RYANODINE RECEPTOR (RYR1) GENE SO GENOMICS LA English DT Article ID MALIGNANT HYPERTHERMIA SUSCEPTIBILITY; FLUORESCENCE INSITU HYBRIDIZATION; MUSCLE SARCOPLASMIC-RETICULUM; CA-2+ RELEASE CHANNEL; INTERPHASE CELL-NUCLEI; CENTRAL CORE DISEASE; HUMAN DNA; MYOTONIC-DYSTROPHY; COMPLEMENTARY-DNA; MOLECULAR-CLONING C1 UNIV TORONTO,CHARLES H BEST INST,BANTING & BEST DEPT MED RES,TORONTO M5G 1L6,ONTARIO,CANADA. RP ROUQUIER, S (reprint author), LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,BIOL & BIOTECHNOL RES PROGRAM L452,LIVERMORE,CA 94550, USA. NR 61 TC 12 Z9 12 U1 0 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD AUG PY 1993 VL 17 IS 2 BP 330 EP 340 DI 10.1006/geno.1993.1329 PG 11 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA LP815 UT WOS:A1993LP81500009 PM 8406483 ER PT J AU CHIARELLO, RP WOGELIUS, RA STURCHIO, NC AF CHIARELLO, RP WOGELIUS, RA STURCHIO, NC TI IN-SITU SYNCHROTRON X-RAY REFLECTIVITY MEASUREMENTS AT THE CALCITE-WATER INTERFACE SO GEOCHIMICA ET COSMOCHIMICA ACTA LA English DT Letter ID DISSOLUTION; SURFACE; SCATTERING; ROUGHNESS; CRYSTAL; GROWTH AB In-situ synchrotron X-ray reflectivity (SXR) measurements of the calcite-water interface were made. These data were used to model the angstrom-scale interfacial width and electron densitv profile of the interface. Measurements were made on the (1014BAR) cleavage surface of Iceland spar calcite in contact with pure N2, humid N2, deionized water, and dilute nitric acid solutions at 25-degrees-C. The measurements were performed in an X-ray transparent reaction cell in which fluid pH was monitored during SXR data acquisition. Analysis of the data indicated that the pristine calcite surface in contact with pure N2 has an interfacial width (statistical roughness) of 2.60 +/- 0.15 angstrom. Exposure to water vapor (humid N2) resulted in the deposition of a water film 19.9 +/- 0.4 angstrom thick. There was no evidence from the SXR data that the adsorbed water film caused roughening of the calcite surface. However, when reacted with deionized water the calcite was roughened, yielding an interfacial width of 23.1 angstrom. During successive reactions with fluids having decreasing initial pH the calcite/fluid interfacial width increased from 23.1 to 45.3 angstrom. The SXR results indicate that intraterrace areas participate in the dissolution of calcite. A linear correlation was observed between interfacial width of the intraterrace areas and the quantity of calcite dissolved. RP CHIARELLO, RP (reprint author), ARGONNE NATL LAB, GEOSCI, CMT-205, ARGONNE, IL 60439 USA. RI Wogelius, Roy/C-4917-2008; OI Wogelius, Roy/0000-0002-5781-2152 NR 22 TC 46 Z9 46 U1 1 U2 12 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0016-7037 EI 1872-9533 J9 GEOCHIM COSMOCHIM AC JI Geochim. Cosmochim. Acta PD AUG PY 1993 VL 57 IS 16 BP 4103 EP 4110 DI 10.1016/0016-7037(93)90356-2 PG 8 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LW389 UT WOS:A1993LW38900021 ER PT J AU WHITNEY, JW HARRINGTON, CD AF WHITNEY, JW HARRINGTON, CD TI RELICT COLLUVIAL BOULDER DEPOSITS AS PALEOCLIMATIC INDICATORS IN THE YUCCA MOUNTAIN REGION, SOUTHERN NEVADA SO GEOLOGICAL SOCIETY OF AMERICA BULLETIN LA English DT Article ID ROCK-VARNISH; CATION-RATIO; PRODUCTION-RATES; GREAT-BASIN; CALIFORNIA; LANDFORMS; DESERTS AB Early to middle Pleistocene boulder deposits are common features on southern Nevada hillslopes. These darkly varnished, ancient colluvial deposits stand out in stark contrast to the underlying light-colored bedrock of volcanic tuffs, and they serve as minor divides between drainage channels on modern hillslopes. To demonstrate the antiquity of these stable hillslope features, six colluvial boulder deposits from Yucca Mountain, Nye County, Nevada, were dated by cation-ratio dating of rock varnish accreted on boulder surfaces. Estimated minimum ages of these boulder deposits range from 760 to 170 ka. Five additional older deposits on nearby Skull and Little Skull Mountains and Buckboard Mesa yielded cation-ratio minimum-age estimates of 1.38 Ma to 800 ka. An independent cosmogenic chlorine-36 surface exposure date was obtained on one deposit, which confirms an estimated early to middle Quaternary age. These deposits have provided the oldest age estimates for unconsolidated hillslope deposits in the southwestern United States. We suggest that the colluvial boulder deposits were produced during early and middle Pleistocene glacial/pluvial episodes and were stabilized during the transition to drier interglacial climates. By comparison to modern periglacial environments, winter minimum monthly temperatures of -3 to -5-degrees-C were necessary to initiate freeze-thaw conditions of such vigor to physically weather relatively large volumes of large boulders from the upper hillslopes of the Yucca Mountain area. These conditions imply that early and middle Pleistocene glacial winter temperatures were at least 1 to 3-degrees-C colder than existed during the last Pleistocene glacial episode and 7 to 9-degrees-C colder than present. We conclude that at least several early and middle Pleistocene glacial episodes were colder, and perhaps wetter, than glacial episodes of the late Pleistocene in the southern Great Basin. Geomorphic processes necessary to form these colluvial boulder deposits are not active on modern hillslopes in the southern Great Basin. In addition, the lack of young, relatively unvarnished colluvial boulder deposits on these hillslopes suggests that boulder-forming conditions did not exist during the late Pleistocene in this region. Modern semiarid hillslope processes primarily erode colluvium during infrequent high-intensity storms. The preservation of old, thin hillslope deposits and the less-than-2-m incision by hillslope runoff adjacent to these deposits, however, indicate that extremely low denudation rates have occurred on resistant volcanic hillslopes in the southern Great Basin during Quaternary time. C1 LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545. RP WHITNEY, JW (reprint author), US GEOL SURVEY,CTR FED,MS 425,DENVER,CO 80225, USA. NR 51 TC 30 Z9 30 U1 0 U2 1 PU GEOLOGICAL SOC AMERICA PI BOULDER PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301 SN 0016-7606 J9 GEOL SOC AM BULL JI Geol. Soc. Am. Bull. PD AUG PY 1993 VL 105 IS 8 BP 1008 EP 1018 DI 10.1130/0016-7606(1993)105<1008:RCBDAP>2.3.CO;2 PG 11 WC Geosciences, Multidisciplinary SC Geology GA LR570 UT WOS:A1993LR57000003 ER PT J AU METZGER, R RICHARDSON, R VANRIPER, KA AF METZGER, R RICHARDSON, R VANRIPER, KA TI A MONTE-CARLO MODEL FOR RETROSPECTIVE ANALYSIS OF SHIELD DESIGN IN A DIAGNOSTIC-X-RAY ROOM SO HEALTH PHYSICS LA English DT Article DE DIAGNOSTIC RADIOLOGY; SHIELDING; MONTE-CARLO; ANALYSIS, RISK ID GYPSUM WALLBOARD AB Recent recommendations by the NCRP and the ICRP have lowered the nonoccupational dose limit from 5 mSv-1 to 1 mSv-1. This change has also been incorporated in the recently revised Title 10 Code of Federal Regulations, Part 20. Shielding installed in most current diagnostic x-ray rooms was based on the 5-mSv limit when rooms or corridors adjacent to the x-ray room were unrestricted areas. A computer model for evaluating shielding in a diagnostic x-ray room has been developed using the following: the Monte Carlo Code MCNP, all materials that would normally attenuate the beam in an x-ray room, realistic assumptions for work load, and a spectrum of tube potentials based on actual usage. Results indicate that most radiographic x-ray rooms with shielding designed using the conservative assumptions in NCRP 49 will meet the new standards. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP METZGER, R (reprint author), RADIAT SAFETY ENGN INC, 3245 N WASHINGTON ST, CHANDLER, AZ 85225 USA. NR 16 TC 11 Z9 11 U1 0 U2 1 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD AUG PY 1993 VL 65 IS 2 BP 164 EP 171 DI 10.1097/00004032-199308000-00006 PG 8 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA LN392 UT WOS:A1993LN39200006 PM 8330963 ER PT J AU PEARLSTEIN, S AF PEARLSTEIN, S TI NUCLEAR-DATA FOR NEUTRON AND PROTON INTERACTIONS WITH C-12 IN THE ENERGY-RANGE 0-10 GEV SO HEALTH PHYSICS LA English DT Note DE MODELING; NEUTRONS; PROTONS; C-12 AB Nuclear model codes and nuclear systematics are used to give a first approximation to data for nucleons interacting with a C-12 target over the range 0-10 GeV. Where there are experiments, the trial values are replaced by an eye guide through the measurements. The evaluated data have been placed in computerized form and are available for distribution. C1 BROOKHAVEN NATL LAB, DEPT NUCL ENERGY, UPTON, NY 11973 USA. NR 11 TC 6 Z9 6 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD AUG PY 1993 VL 65 IS 2 BP 185 EP 189 DI 10.1097/00004032-199308000-00009 PG 5 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA LN392 UT WOS:A1993LN39200009 PM 8392503 ER PT J AU GAMMAGE, RB WHEELER, RV AF GAMMAGE, RB WHEELER, RV TI TESTING CR-39 FOR SURFACE ALPHA-CONTAMINATION MONITORING SO HEALTH PHYSICS LA English DT Article DE DETECTOR, ALPHA-TRACK; SURFACE CONTAMINATION; ALPHA-PARTICLES; DECONTAMINATION AB Alpha-track detectors made of CR-39 plastic were successfully tested in monitoring surface alpha contamination in decontamination and decommissioning. The alpha registration efficiency was about 70%. At 3.7 Bq cm-2 a 10:1 signal-to-noise response was obtained after a 100-min exposure. The alpha-track detector maps small-scale spacial variability of alpha contamination that conventional survey meters cannot. The detector recognizes hot particles. Small-sized detectors are deployable in difficult-to-access locations such as cracks or under tightly fitting equipment where dirt resists easy removal. C1 LANDAUER INC, GLENWOOD, IL 60425 USA. RP GAMMAGE, RB (reprint author), OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU LIPPINCOTT WILLIAMS & WILKINS PI PHILADELPHIA PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA SN 0017-9078 EI 1538-5159 J9 HEALTH PHYS JI Health Phys. PD AUG PY 1993 VL 65 IS 2 BP 209 EP 213 DI 10.1097/00004032-199308000-00013 PG 5 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA LN392 UT WOS:A1993LN39200013 PM 8330969 ER PT J AU TAYLOR, RT HANNA, ML SHAH, NN SHONNARD, DR DUBA, AG DURHAM, WB JACKSON, KJ KNAPP, RB WIJESINGHE, AM KNEZOVICH, JP JOVANOVICH, MC AF TAYLOR, RT HANNA, ML SHAH, NN SHONNARD, DR DUBA, AG DURHAM, WB JACKSON, KJ KNAPP, RB WIJESINGHE, AM KNEZOVICH, JP JOVANOVICH, MC TI IN-SITU BIOREMEDIATION OF TRICHLOROETHYLENE-CONTAMINATED WATER BY A RESTING-CELL METHANOTROPHIC MICROBIAL FILTER SO HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES LA English DT Article; Proceedings Paper CT IN-SITU BIOREMEDIATION SYMP 92 CY SEP 20-24, 1992 CL NIAGARA ON LAKE, CANADA AB An in situ microbial filter technology is being tested and developed for remediating migrating subsurface plumes contaminated with low concentrations of trichloroethylene (TCE). The current focus is the establishment of a replenishable bioactive zone (catalytic filter) along expanding plume boundaries by the injection of a representative methanotrophic bacterium, Methylosinus trichosporium OB3b. This microbial filter strategy has been successfully demonstrated using emplaced, attached resting cells (no methane additions) in a 1.1 m flow-through test bed loaded with water-saturated sand. Two separate 24 h pulses of TCE (109 ppb and 85 ppb), one week apart, were pumped through the system at a flow velocity of 15 mm h-1; no TCE (< 0.5 ppb) was detected on the downstream side of the microbial filter. Subsequent excavation of the wet sand confirmed the existence of a TCE-bioactive zone 21 days after it had been created. An enhanced longevity of the cellular, soluble-form methane monooxygenase produced by this methanotroph is a result of the laboratory bioreactor culturing conditions. Additional experiments with cells in sealed vials and emplaced in the 1.1 m test bed yielded a high resting-cell finite TCE biotransformation capacity of about 0.25 mg per mg of bacteria; this is suitable for a planned sand-filled trench field demonstration at a Lawrence Livermore National Laborato site. RP TAYLOR, RT (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94550, USA. RI jackson, Kenneth/E-2236-2013 OI jackson, Kenneth/0000-0003-4231-3809 NR 0 TC 30 Z9 30 U1 0 U2 4 PU IAHS PRESS, INST HYDROLOGY PI WALLINGFORD PA C/O SARAH CAGE, WALLINGFORD, ENGLAND OX10 8BB SN 0262-6667 J9 HYDROLOG SCI J JI Hydrol. Sci. J.-J. Sci. Hydrol. PD AUG PY 1993 VL 38 IS 4 BP 323 EP 342 DI 10.1080/02626669309492678 PG 20 WC Water Resources SC Water Resources GA MH636 UT WOS:A1993MH63600007 ER PT J AU Floyd, S Jacobson, V AF Floyd, Sally Jacobson, Van TI Random Early Detection Gateways for Congestion Avoidance SO IEEE-ACM TRANSACTIONS ON NETWORKING LA English DT Article AB This paper presents Random Early Detection (RED) gateways for congestion avoidance in packet-switched networks. The gateway detects incipient congestion by computing the average queue size. The gateway could notify connections of congestion either by dropping packets arriving at the gateway or by setting a bit in packet headers. When the average queue size exceeds a preset threshold, the gateway drops or marks each arriving packet with a certain probability, where the exact probability is a function of the average queue size. RED gateways keep the average queue size low while allowing occasional bursts of packets in the queue. During congestion, the probability that the gateway notifies a particular connection to reduce its window is roughly proportional to that connection's share of the bandwidth through the gateway. RED gateways are designed to accompany a transport-layer congestion control protocol such as TCP. The RED gateway has no bias against bursty traffic and avoids the global synchronization of many connections decreasing their window at the same time. Simulations of a TCP/ IP network are used to illustrate the performance of RED gateways. C1 [Floyd, Sally; Jacobson, Van] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Floyd, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM floyd@ee.lbl.gov; van@ee.lbl.gov FU Office of Energy Research, U.S. Department of Energy [DE-AC03-76SF00098] FX Manuscript received April 1993: revised July 1993: approved by IEEE/ACM TRANSACTIONS ON NETWORKING Editor L. Zhang and the Editor-in-Chief. This work was supported by the Director of the Office of Energy Research, Scientific Computing Staff, U.S. Department of Energy under Contract DE-AC03-76SF00098. NR 38 TC 2691 Z9 3067 U1 7 U2 54 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI PISCATAWAY PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA SN 1063-6692 J9 IEEE ACM T NETWORK JI IEEE-ACM Trans. Netw. PD AUG PY 1993 VL 1 IS 4 BP 397 EP 413 DI 10.1109/90.251892 PG 17 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic; Telecommunications SC Computer Science; Engineering; Telecommunications GA V20RB UT WOS:000208156000001 ER PT J AU HEBNER, GA HAYS, GN AF HEBNER, GA HAYS, GN TI 1.27-MU-M ATOMIC ARGON-LASER PARAMETERS IN FISSION-FRAGMENT EXCITED HE/AR AND HE/NE/AR GAS-MIXTURES SO IEEE JOURNAL OF QUANTUM ELECTRONICS LA English DT Article ID XENON AB Power efficiency of the fission-fragment excited atomic argon laser operating on the 1.27-mum (3d'[3/2]1-4p'[3/2]1) argon transition as a function of pump power, gas mixture, and pressure is discussed. Maximum measured power efficiency was 1.1 +/- 0.3% for a gas pressure of 1300 torr and a He/Ar ratio of 99.88/0.12. Neon addition to the He/Ar gas mixture increased both the energy deposited in the gas and the energy output without decreasing efficiency for a neon gas fraction of less than 0.5. Small-signal gain and saturation intensity is between 0. 15-0.27%/cm and 25-200 W/cm2 for pump rates of 7.5-30 W/cm3 in He/Ar and He/Ne/Ar gas mixtures. The laser threshold as a function of total pressure and argon concentration is presented. RP HEBNER, GA (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 31 TC 4 Z9 4 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9197 J9 IEEE J QUANTUM ELECT JI IEEE J. Quantum Electron. PD AUG PY 1993 VL 29 IS 8 BP 2356 EP 2363 DI 10.1109/3.245566 PG 8 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA MK619 UT WOS:A1993MK61900013 ER PT J AU PIERRE, DA TRUDNOWSKI, DJ AF PIERRE, DA TRUDNOWSKI, DJ TI 2 FORMULATIONS OF EXPONENTIALLY WEIGHTED ENHANCED LQ CONTROLLERS SO IEEE TRANSACTIONS ON AUTOMATIC CONTROL LA English DT Note AB Properties of a class of multiinput, multioutput digital controllers are examined. The controllers incorporate three features: 1) optimal gains associated with known exogenous inputs; 2) penalties imposed both on squares of first backward differences in control actions and on control actions squared; and 3) exponential weighting to ensure bounds on closed-loop eigenvalues. Two versions of exponential weighting are treated. Results are given both for the finite-horizon versions of the problems and for the infinite-horizon versions of the problems. The results include expressions for optimal feedback gains and for optimal preview gains. For the infinite-horizon versions of the problems, relationships are derived between the optimal closed-loop eigenvalues and the eigenvalues associated with the preview gains. Two examples are given to illustrate properties of these controllers. C1 PACIFIC NW LAB, DEPT ENERGY SCI, RICHLAND, WA 99352 USA. RP PIERRE, DA (reprint author), MONTANA STATE UNIV, DEPT ELECT ENGN, BOZEMAN, MT 59717 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9286 J9 IEEE T AUTOMAT CONTR JI IEEE Trans. Autom. Control PD AUG PY 1993 VL 38 IS 8 BP 1308 EP 1312 DI 10.1109/9.233176 PG 5 WC Automation & Control Systems; Engineering, Electrical & Electronic SC Automation & Control Systems; Engineering GA LW670 UT WOS:A1993LW67000026 ER PT J AU REES, DE CARLSTEN, BE HUMPHRIES, S TALLERICO, PJ AF REES, DE CARLSTEN, BE HUMPHRIES, S TALLERICO, PJ TI CALCULATION OF BEAM LOADING USING THE INDUCED-CURRENT METHOD IN PASSIVE CAVITIES SO IEEE TRANSACTIONS ON ELECTRON DEVICES LA English DT Article AB Quantitative knowledge of beam loading and detuning is necessary for the prediction of the bandwidth and operating frequency of an electron device that has resonant interactions. We present a method for calculating the loaded Q and beam detuning of a passive (gain or idler) cavity in an electron device. The method is based on the determination of induced current by a technique often referred to as Ramo's theorem. We use the induced current in conjunction with a lumped equivalent circuit representing the cavity. This leads to a solution for the self-consistent cavity fields. Although the induced-current expression is usually developed from low-frequency models, we show that Ramo's theorem is valid for high-frequency, steady-state analysis when the unloaded passive cavity Q is high. We use the method to calculate the loaded Q of the passive cavity of a new type of gyro-resonant electron device, the magnicon. C1 UNIV NEW MEXICO,DEPT ELECT & COMP ENGN,ALBUQUERQUE,NM 87131. RP REES, DE (reprint author), LOS ALAMOS NATL LAB,DIV ACCELERAT TECHNOL,LOS ALAMOS,NM 87545, USA. NR 8 TC 6 Z9 6 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9383 J9 IEEE T ELECTRON DEV JI IEEE Trans. Electron Devices PD AUG PY 1993 VL 40 IS 8 BP 1543 EP 1548 DI 10.1109/16.223717 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA LN726 UT WOS:A1993LN72600026 ER PT J AU SAILOR, WC MUELLER, FM CARLSTEN, BE AF SAILOR, WC MUELLER, FM CARLSTEN, BE TI THEORY FOR A CYLINDRICAL PILLBOX ACCELERATOR CAVITY USING LAYERED STRUCTURES FOR REDUCING SKIN-EFFECT LOSSES SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES LA English DT Note AB It is shown that for a cylindrical pillbox accelerator cavity operating in a TM0n0 mode, the use of laminated conductors for the flat walls in conjunction with a multilayered dielectric structure for the round walls can decrease skin-effect losses by an order of magnitude over thal of a copper cavity having the same accelerating field. The layered dielectric structure for the round walls works in a fashion similar to a quarter-wave interferometer. The laminated conductor on the flat walls reduces the ohmic losses by effectively increasing the skin depth. RP SAILOR, WC (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 4 TC 1 Z9 1 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9480 J9 IEEE T MICROW THEORY JI IEEE Trans. Microw. Theory Tech. PD AUG PY 1993 VL 41 IS 8 BP 1471 EP 1474 DI 10.1109/22.241694 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA MG180 UT WOS:A1993MG18000034 ER PT J AU CHO, GS DREWERY, JS HONG, WS JING, T KAPLAN, SN LEE, H MIRESHGHI, A PEREZMENDEZ, V WILDERMUTH, D AF CHO, GS DREWERY, JS HONG, WS JING, T KAPLAN, SN LEE, H MIRESHGHI, A PEREZMENDEZ, V WILDERMUTH, D TI SIGNAL READOUT IN A-SIH PIXEL DETECTORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB Amorphous- or polysilicon thin-film technology can be used to make readout electronics for large-area a-Si:H pixel detectors. A switch consisting of two a-Si:H p-i-n diodes was. studied to readout signals from pixels for the imaging of X-ray or gamma ray distributions. A charge storage time of 20 msec and a readout time of 0.7 musec were achieved. For the detection of single ionizing particles, polysilicon thin-film-transistor amplifiers can be integrated to amplify the small signals at the pixel level before readout. Prototype polysilicon TFT amplifiers were designed and fabricated. The measured gain-bandwidth product was approximately 300 MHz and the input equivalent noise charge was approximately 1000 electrons for a 1 musec shaping time. RP CHO, GS (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Cho, Gyuseong/C-1527-2011 NR 10 TC 3 Z9 3 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 323 EP 327 DI 10.1109/23.256573 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100003 ER PT J AU FRIESE, J GILLITZER, A KORNER, HJ MAIER, MR AF FRIESE, J GILLITZER, A KORNER, HJ MAIER, MR TI LOW-COST PULSE SHAPER FOR USE WITH SILICON PIN DIODES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID NOISE AB We have developed a flexible, small and low cost analog pulse shaper and amplifier circuit for silicon PIN photodiode detectors. The shaping amplifier produces both a ''fast'' negative output signal with <10ns rise time for timing measurements and a ''slow'' positive output signal with peaking times from 500 ns to 10 mus for energy measurements. The gain for the two signals can be set independently. The maximum output amplitude for the fast signal is -1.5V and +10V for the slow signal. The resolution for the energy channel was <10keV electronic contribution giving a total of 17keV with alpha particles. The resolution for the timing channel was <1ns electronics with a total of 2ns with alpha-particles. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP FRIESE, J (reprint author), TECH UNIV MUNICH,W-8000 MUNICH 2,GERMANY. NR 3 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 339 EP 343 DI 10.1109/23.256576 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100006 ER PT J AU ZIOCK, HJ BOISSEVAIN, JG HOLZSCHEITER, K KAPUSTINSKY, JS PALOUNEK, APT SONDHEIM, WE BARBERIS, E CARTIGLIA, N LESLIE, J PITZL, D ROWE, WA SADROZINSKI, HFW SEIDEN, A SPENCER, E WILDER, M ELLISON, JA FLEMING, JK JERGER, S JOYCE, D LIETZKE, C REED, E WIMPENNY, SJ FERGUSON, P FRAUTSCHI, MA MATTHEWS, JAJ SKINNER, D AF ZIOCK, HJ BOISSEVAIN, JG HOLZSCHEITER, K KAPUSTINSKY, JS PALOUNEK, APT SONDHEIM, WE BARBERIS, E CARTIGLIA, N LESLIE, J PITZL, D ROWE, WA SADROZINSKI, HFW SEIDEN, A SPENCER, E WILDER, M ELLISON, JA FLEMING, JK JERGER, S JOYCE, D LIETZKE, C REED, E WIMPENNY, SJ FERGUSON, P FRAUTSCHI, MA MATTHEWS, JAJ SKINNER, D TI TEMPERATURE-DEPENDENCE OF RADIATION-DAMAGE AND ITS ANNEALING IN SILICON DETECTORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB The radiation damage resulting from the large particle fluences predicted at the Superconducting Super Collider will induce significant leakage currents in silicon detectors. In order to limit those currents, we plan to operate the detectors at reduced temperatures (approximately 0-degrees-C). In this paper, we present the results of a study of temperature effects on both the initial radiation damage and the long-term annealing of that damage in silicon PIN detectors. Depletion voltage results are reported. The detectors were exposed to approximately 10(14)/cm2 650 MeV protons. Very pronounced temperature dependencies were observed. C1 UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064. UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521. UNIV MISSOURI,ROLLA,MO 65401. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. RP ZIOCK, HJ (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. OI Ferguson, Phillip/0000-0002-7661-4223 NR 8 TC 32 Z9 32 U1 1 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 344 EP 348 DI 10.1109/23.256577 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100007 ER PT J AU ROSSINGTON, CS FINE, PM MADDEN, NW AF ROSSINGTON, CS FINE, PM MADDEN, NW TI LARGE-AREA, LOW CAPACITANCE SI(LI) DETECTORS FOR HIGH-RATE X-RAY APPLICATIONS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB Large area, single-element Si(Li) detectors have been fabricated using a novel geometry which yields detectors with reduced capacitance and hence reduced noise at short amplifier pulse-processing times. A typical device employing the new geometry with a thickness of 6 mm and an active area of 175 mm2 has a capacitance of only 0.5 pf, compared to 2.9 pf for a conventional planar device with equivalent dimensions. These new low capacitance detectors, used in conjunction with low capacitance field effect transistors, will result in x-ray spectrometers capable of operating at very high count rates while still maintaining excellent energy resolution. The spectral response of the low capacitance detectors to a wide range of x-ray energies at 80 K is comparable to typical state-of-the-art conventional Si(Li) devices. In addition to their low capacitance, the new devices offer other advantages over conventional detectors. Detector fabrication procedures, I-V and C-V characteristics, noise performance, and spectral response to 2-60 keV x-rays are described. RP ROSSINGTON, CS (reprint author), LAWRENCE BERKELEY LAB,DIV ENGN,DEPT ENGN SCI,BERKELEY,CA 94720, USA. NR 7 TC 3 Z9 3 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 354 EP 359 DI 10.1109/23.256579 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100009 ER PT J AU ZHENG, L EREMIN, V STROKAN, N VERBITSKAYA, E AF ZHENG, L EREMIN, V STROKAN, N VERBITSKAYA, E TI INVESTIGATION OF THE TYPE INVERSION PHENOMENA - RESISTIVITY AND CARRIER MOBILITY IN THE SPACE-CHARGE REGION AND ELECTRICAL NEUTRAL BULK IN NEUTRON-IRRADIATED SILICON P+-N JUNCTION DETECTORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID RADIATION; DAMAGE AB The changes of effective dopant concentration in the space-charge region (SCR) of neutron irradiated silicon detectors have been investigated near the type inversion point. In addition to the conventional capacitance-voltage(C-V) measurements, transient current technique(TCT) using a laser light excitation which is absorbed within 10 mum of silicon was also applied. The details of transient current response in irradiated silicon detectors are discussed, which gave the possibility for determining the effective dopant concentration in the SCR as well as properties in the electrical neutral bulk(ENB) of silicon detectors. C1 AF IOFFE PHYS TECH INST,ST PETERSBURG,RUSSIA. RP ZHENG, L (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Verbitskaya, Elena/D-1521-2014 NR 18 TC 10 Z9 10 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 367 EP 375 DI 10.1109/23.256582 PN 1 PG 9 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100012 ER PT J AU LEMPICKI, A BERMAN, E WOJTOWICZ, AJ BALCERZYK, M BOATNER, LA AF LEMPICKI, A BERMAN, E WOJTOWICZ, AJ BALCERZYK, M BOATNER, LA TI CERIUM-DOPED ORTHOPHOSPHATES - NEW PROMISING SCINTILLATORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID ELECTRONIC RAMAN-SCATTERING; LUPO4; CE-3+ AB We report initial results for a new class of scintillating materials, cerium doped rare earth orthophosphates. The most promising is Ce:LuPO4, which under gamma-excitation shows fast, single-exponential decay, of 25 ns at room temperature, and a light output of 17,200 photons per 1 MeV. These features combined with a reasonable density, (6.53 g/cm3), make it a strong contender for many applications. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP LEMPICKI, A (reprint author), BOSTON UNIV,DEPT CHEM,590 COMMONWEALTH AVE,BOSTON,MA 02215, USA. RI Wojtowicz, Andrzej/D-7418-2014; Balcerzyk, Marcin/H-4071-2011; Boatner, Lynn/I-6428-2013 OI Wojtowicz, Andrzej/0000-0001-5788-5987; Balcerzyk, Marcin/0000-0001-6030-7416; Boatner, Lynn/0000-0002-0235-7594 NR 12 TC 64 Z9 64 U1 1 U2 11 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 384 EP 387 DI 10.1109/23.256585 PN 1 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100015 ER PT J AU FRIESE, J GILLITZER, A KORNER, HJ REINHOLD, J PETER, M MAIER, MR AF FRIESE, J GILLITZER, A KORNER, HJ REINHOLD, J PETER, M MAIER, MR TI THE SISWICH, A DETECTOR TELESCOPE WITH INTRINSIC CALIBRATION SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID LOGARITHMIC DETECTION SYSTEM; LIGHT CHARGED-PARTICLE; RESPONSE CHARACTERISTICS; MULTIDETECTOR SYSTEM; CSI(TI) SCINTILLATOR; DWARF BALL; 4-PI; INSTRUMENTATION; IDENTIFICATION; DESIGN AB Phoswich counters have gained widespread popularity as detectors and identifiers for medium energy charged particles. They provide adequate energy resolution and particle identification up to atomic numbers Z=20 but calibration has proved difficult. To overcome this difficulty we have built a SIlicon-Scintillator SandWICH (SISWICH). This detector consists of a silicon PIN photo diode glued to the front of a CsI(Tl) scintillator crystal. The signal coming from the PIN diode contains the energy deposited by the particle by direct ionisation in the silicon, which is very fast, and the light output of the scintillator which is slow. The direct component can be calibrated against a pulser. Therefore, since the energy loss of a particular particle has been measured, its energy is known, and this can be used to calibrate the signal from the scintillator. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP FRIESE, J (reprint author), TECH UNIV MUNICH,W-8000 MUNICH 2,GERMANY. NR 19 TC 8 Z9 8 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 443 EP 446 DI 10.1109/23.256597 PN 1 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100027 ER PT J AU YOUNG, KG BAUER, ML COHN, H EFREMENKO, Y GORDEEV, A KAMYSHKOV, Y ONOPIENKO, D SAVIN, S SHMAKOV, K TARKOVSKY, E CAREY, R ROTHMAN, M SULAK, L WORSTELL, W PAAR, H AF YOUNG, KG BAUER, ML COHN, H EFREMENKO, Y GORDEEV, A KAMYSHKOV, Y ONOPIENKO, D SAVIN, S SHMAKOV, K TARKOVSKY, E CAREY, R ROTHMAN, M SULAK, L WORSTELL, W PAAR, H TI EFFECTS OF RADIATION ON SCINTILLATING-FIBER PERFORMANCE SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID CALORIMETRY; DAMAGE; TIME AB Continued rapid improvements in formulations for scintillating fibers require the ability to parameterize and predict effects of radiation on detector performance. Experimental techniques necessary to obtain desired information and calculational procedures used in performing predications for hadron scintillating fiber calorimetry in the Superconducting Supercollider environment are described. The experimental techniques involve control of the testing environment, consideration of dose rate effects, and other factors. The calculations involve the behavior of particle showers in the detector, expected levels of radiation, and parameterization of the radiation effects. A summary of significant work is also presented. C1 BOSTON UNIV,BOSTON,MA 02215. UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. RP YOUNG, KG (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 31 TC 1 Z9 1 U1 1 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 461 EP 465 DI 10.1109/23.256601 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100031 ER PT J AU ABBOTT, B ADAMS, D ARMSTRONG, T ATAC, M BAUMBAUGH, A BAUMBAUGH, B BINKLEY, M BIRD, S BISHOP, J BISWAS, N BROSS, AD BUCHANAN, C CASON, N CHANEY, R CHRISMAN, D CHUNG, M CLINE, D COLLINS, G CORCORAN, M DAVIS, D DAVIES, R ELIAS, J FENKER, H FENYVES, E FINLEY, D FOSTER, GW GOLDBERG, H HAMMACK, H HASAN, A HEPPELMANN, S JAQUES, J JESIK, R KAUFFMAN, J KEHOE, R KELLEY, C KELLY, M KENNEY, V KEPHART, R KIM, C KOLTICK, D KOLONKO, J KUBIC, J LEWIS, RA LOSECCO, J LOWERY, B MARCHANT, J MCILWAIN, R MARGULIES, S MENDEZ, H MIETTENEN, H MOORE, R MOUNTAIN, RJ OH, B ORGERON, J PARK, H PARK, J PASSANEAU, J PLADALMAU, A RIVETTA, C RUCHTI, R SCALISE, R SCHMITZ, J SHEPHARD, W SHIBATA, E SKEENS, J SMITH, GA SOLOMON, J THOMAS, J TKACZYK, S TOOTHACKER, W VACA, F VANDERGRIFF, D WAGNER, R WARCHOL, J WAYNE, M WHITMORE, J AF ABBOTT, B ADAMS, D ARMSTRONG, T ATAC, M BAUMBAUGH, A BAUMBAUGH, B BINKLEY, M BIRD, S BISHOP, J BISWAS, N BROSS, AD BUCHANAN, C CASON, N CHANEY, R CHRISMAN, D CHUNG, M CLINE, D COLLINS, G CORCORAN, M DAVIS, D DAVIES, R ELIAS, J FENKER, H FENYVES, E FINLEY, D FOSTER, GW GOLDBERG, H HAMMACK, H HASAN, A HEPPELMANN, S JAQUES, J JESIK, R KAUFFMAN, J KEHOE, R KELLEY, C KELLY, M KENNEY, V KEPHART, R KIM, C KOLTICK, D KOLONKO, J KUBIC, J LEWIS, RA LOSECCO, J LOWERY, B MARCHANT, J MCILWAIN, R MARGULIES, S MENDEZ, H MIETTENEN, H MOORE, R MOUNTAIN, RJ OH, B ORGERON, J PARK, H PARK, J PASSANEAU, J PLADALMAU, A RIVETTA, C RUCHTI, R SCALISE, R SCHMITZ, J SHEPHARD, W SHIBATA, E SKEENS, J SMITH, GA SOLOMON, J THOMAS, J TKACZYK, S TOOTHACKER, W VACA, F VANDERGRIFF, D WAGNER, R WARCHOL, J WAYNE, M WHITMORE, J TI EFFECTS OF A HADRON IRRADIATION ON SCINTILLATING FIBERS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID PLASTIC SCINTILLATORS; RADIATION-DAMAGE AB Trackers based on scintillating-fiber technology are being considered by the Solenoidal Detector Collaboration at SSC and the D0 collaboration at Fermilab. An important issue is the effect of the radiation existing in the detector cores on fiber properties. Most studies of radiation damage in scintillators have irradiated small bulk samples rather than fibers, and have used X-rays, Co-60 gammas, or electron beams, often at accelerated rates. We have irradiated some 600 fibers in the Fermilab Tevatron C0 area, thereby obtaining a hadronic irradiation at realistic rates. Four-meter-long samples of ten Bicron polystyrene-based fiber types, maintained in air, dry nitrogen, argon, and vacuum atmospheres within stainless-steel tubes, were irradiated for seven weeks at various distances from the accelerator beam pipes. Maximum doses, measured by thermoluminescence detectors, were about 80 Krad. Fiber properties, particularly light yield and attenuation length, have been measured over a one-year period. A description of the work together with the results is presented. At the doses achieved, corresponding to a few years of actual fiber-tracking detector operation, little degradation is observed. In addition, recovery after several days' exposure to air has been noted. Properties of unirradiated samples kept in darkness show no changes after one year. C1 UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV ILLINOIS,CHICAGO,IL 60680. MASSACHUSETTS COLL PHARM & ALLIED HLTH SCI,BOSTON,MA 02115. UNIV NOTRE DAME,NOTRE DAME,IN 46556. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. PENN STATE UNIV,UNIV PK,PA 16802. PHILADELPHIA COLL PHARM & SCI,PHILADELPHIA,PA 19104. RICE UNIV,HOUSTON,TX 77251. UNIV TEXAS,DALLAS,TX 75230. RP ABBOTT, B (reprint author), PURDUE UNIV,W LAFAYETTE,IN 47907, USA. NR 17 TC 2 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 476 EP 483 DI 10.1109/23.256604 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100034 ER PT J AU WOODY, CL KIERSTEAD, JA LEVY, PW STOLL, S WEINGARTEN, AB ANDERSON, DF RAMBERG, EJ KUNO, Y MACDONALD, JA KONAKA, A HUTCHEON, DA AF WOODY, CL KIERSTEAD, JA LEVY, PW STOLL, S WEINGARTEN, AB ANDERSON, DF RAMBERG, EJ KUNO, Y MACDONALD, JA KONAKA, A HUTCHEON, DA TI A STUDY ON THE USE OF LEAD FLUORIDE FOR ELECTROMAGNETIC CALORIMETRY SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB A study has been made on the properties of lead fluoride as a Cherenkov material for use in electromagnetic calorimetry. A prototype calorimeter module consisting of a 5 x 5 array of 2.1 x 2.1 x 18.5 cm3 crystals has been built and tested in a test beam at the Brookhaven AGS. Results are given on energy resolution, shower size and e/pi separation for electrons and pions in the range from 1-4 GeV. The light output has been measured to give greater than or similar to 1000 photoelectrons per MeV in good quality crystals, and to provide useful signals down to as low as 32 MeV. Measurements were also made on radiation damage in lead fluoride using Co-60 gamma rays and high energy ionizing particles, as well as on thermoluminescence after irradiation. It was found that only modest damage occurs up to a level of approximately 30 Krad in large, calorimeter size crystals, and that the damage can be easily removed by optical bleaching. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL. TRIUMF,VANCOUVER,BC,CANADA. RP WOODY, CL (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 5 TC 23 Z9 23 U1 0 U2 1 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 546 EP 551 DI 10.1109/23.256613 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100044 ER PT J AU ARODZERO, A BRAU, J FREY, R FURUNO, K HWANG, H MASON, D STROM, D YANG, X BASHINDZHAGYAN, G TODD, RA AF ARODZERO, A BRAU, J FREY, R FURUNO, K HWANG, H MASON, D STROM, D YANG, X BASHINDZHAGYAN, G TODD, RA TI A PROTOTYPE SILICON PRERADIATOR FOR THE SSC SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID PRESHOWER DETECTOR AB We describe the design and first results from the test of a prototype of a preradiator detector. Such a detector could be used to enhance the identification of photons and electrons at the Superconducting Super Collider (SSC). Specifically, it may be used by the GEM detector to distinguish between single photons from Higgs decay and background photon pairs from pi0 decay. Our prototype consists of tungsten radiator followed by silicon strip detectors. The tungsten thickness was changeable, varying from 0 to 3 radiation lengths. Two silicon detectors, oriented in X and Y, consist of 48 strips, each of length 48mm. The pitch is 1mm. This granularity is required for separating single and multi-photons at the SSC. The readout is achieved by low-noise, low-power custom preamplifier chips mounted directly on the detectors via custom circuit boards. This preradiator was tested in a beam at Brookhaven (BNL) in July 1992. A lead glass array placed behind the silicon was used to determine energy resolution effects. The results from the test on spatial distributions and energy resolution, including correction for the energy deposited in the preradiator are presented, along with comparisons to EGS simulations. C1 MOSCOW MV LOMONOSOV STATE UNIV,MOSCOW,RUSSIA. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP ARODZERO, A (reprint author), UNIV OREGON,DEPT PHYS,EUGENE,OR 97403, USA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 563 EP 568 DI 10.1109/23.256617 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100047 ER PT J AU AVERY, RE BANTLY, J BLESSING, S BUCHHOLZ, D GOBBI, B LIU, Y RAJAGOPALAN, S TILDEN, R MARTIN, M AF AVERY, RE BANTLY, J BLESSING, S BUCHHOLZ, D GOBBI, B LIU, Y RAJAGOPALAN, S TILDEN, R MARTIN, M TI PERFORMANCE OF 2MM RADIUS STRAW TUBE DRIFT CELLS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID CHAMBERS AB The performance of a 128 channel test module made with straw tubes of 2mm radius has been studied in a test beam and with cosmic rays. Different gases were used and for each one the time-to-distance relation and the hit efficiency was measured. Comparisons are made between results when two different electronics readouts were used. The information was recorded with 106M Hz FADC units and also with TDCs (50ps resolution). The best resolution, of 135 mum, was obtained using 50% Ethane, 50% Argon and reading out the information with the TDCs, at an operating HV of 1750V. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP AVERY, RE (reprint author), NORTHWESTERN UNIV,CHICAGO,IL 60611, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 578 EP 582 DI 10.1109/23.256620 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100050 ER PT J AU ABE, K ANTILOGUS, P ASTON, D BAIRD, K BEAN, A BENDAVID, R BIENZ, T BIRD, F CALDWELL, DO CAVALLISFORZA, M COLLER, J COYLE, P COYNE, D DASU, S DOLINSKY, S DOLIVEIRA, A DUBOSCQ, J DUNWOODIE, W HALLEWELL, G HASEGAWA, K HASEGAWA, Y HUBER, J IWASAKI, Y JACQUES, P JOHNSON, RA KALELKAR, M KAWAHARA, H KWON, Y LEITH, DWGS LIU, X LU, A MANLY, S MARTINEZ, J MATHYS, L MCHUGH, S MEADOWS, B MULLER, G MULLER, D NAGAMINE, T NUSSBAUM, M PAVEL, TJ PLANO, R RATCLIFF, B RENSING, P SANTHA, AKS SCHULTZ, D SHANK, JT SHAPIRO, S SIMOPOULOS, C SNYDER, J SOKOLOFF, MD SOLODOV, E STAMER, P STOCKDALE, I SUEKANE, F TOGE, N TURK, J VAVRA, J WHITAKER, JS WILLIAMS, DA WILLIAMS, SH WILSON, RJ WORD, G YELLIN, S YUTA, H AF ABE, K ANTILOGUS, P ASTON, D BAIRD, K BEAN, A BENDAVID, R BIENZ, T BIRD, F CALDWELL, DO CAVALLISFORZA, M COLLER, J COYLE, P COYNE, D DASU, S DOLINSKY, S DOLIVEIRA, A DUBOSCQ, J DUNWOODIE, W HALLEWELL, G HASEGAWA, K HASEGAWA, Y HUBER, J IWASAKI, Y JACQUES, P JOHNSON, RA KALELKAR, M KAWAHARA, H KWON, Y LEITH, DWGS LIU, X LU, A MANLY, S MARTINEZ, J MATHYS, L MCHUGH, S MEADOWS, B MULLER, G MULLER, D NAGAMINE, T NUSSBAUM, M PAVEL, TJ PLANO, R RATCLIFF, B RENSING, P SANTHA, AKS SCHULTZ, D SHANK, JT SHAPIRO, S SIMOPOULOS, C SNYDER, J SOKOLOFF, MD SOLODOV, E STAMER, P STOCKDALE, I SUEKANE, F TOGE, N TURK, J VAVRA, J WHITAKER, JS WILLIAMS, DA WILLIAMS, SH WILSON, RJ WORD, G YELLIN, S YUTA, H TI PERFORMANCE OF THE SLD BARREL CRID DURING THE 1992 PHYSICS DATA RUN SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID RING-IMAGING DETECTOR; CONSTRUCTION AB The SLD Barrel Cherenkov Ring Imaging Detector was fully operational in the 1992 physics data run. The electron drift velocity and magnetic field deflection of electron trajectories have been measured. Cherenkov rings have been observed from both the liquid and gas radiators. The number and the resolution of the angle of Cherenkov photons have been measured to be approximately equal to design specifications. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. RUTGERS UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08855. UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106. YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511. UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064. UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221. BOSTON UNIV,DEPT PHYS,BOSTON,MA 02215. COLORADO STATE UNIV,DEPT PHYS,FT COLLINS,CO 80523. NOVOSIBIRSK NUCL PHYS INST,NOVOSIBIRSK 630090,RUSSIA. UNIV ESTADUAL PAULISTA,BR-15054000 SAO PAULO,BRAZIL. RP ABE, K (reprint author), TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN. RI Cavalli-Sforza, Matteo/H-7102-2015 NR 10 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 589 EP 592 DI 10.1109/23.256622 PN 1 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100052 ER PT J AU ABE, K ANTILOGUS, P ASTON, D BAIRD, K BEAN, A BENDAVID, R BIENZ, T BIRD, F CALDWELL, DO CAVALLISFORZA, M COLLER, J COYLE, P COYNE, D DASU, S DOLINSKY, S DOLIVEIRA, A DUBOSCQ, J DUNWOODIE, W GAGNON, P HALLEWELL, G HASEGAWA, K HASEGAWA, Y HUBER, J IWASAKI, Y JACQUES, P JOHNSON, RA KALELKAR, M KAWAHARA, H KWON, Y LEITH, DWGS LIU, X LU, A MANLY, S MARTINEZ, J MATHYS, L MCCULLOCH, M MCHUGH, S MCSHURLEY, D MULLER, G MULLER, D NAGAMINE, T NUSSBAUM, M PAVEL, TJ PETERSON, H PLANO, R RATCLIFF, B REIF, R RENSING, P SANTHA, AKS SCHNEIDER, M SCHULTZ, D SHANK, JT SHAPIRO, S SHAW, H SIMOPOULOS, C SNYDER, J SOKOLOFF, MD SOLODOV, E STAMER, P STOCKDALE, I SUEKANE, F TOGE, N TURK, J VAVRA, J WATT, R WEBER, T WHITAKER, JS WILLIAMS, DA WILLIAMS, SH WILSON, RJ WORD, G YELLIN, S YUTA, H AF ABE, K ANTILOGUS, P ASTON, D BAIRD, K BEAN, A BENDAVID, R BIENZ, T BIRD, F CALDWELL, DO CAVALLISFORZA, M COLLER, J COYLE, P COYNE, D DASU, S DOLINSKY, S DOLIVEIRA, A DUBOSCQ, J DUNWOODIE, W GAGNON, P HALLEWELL, G HASEGAWA, K HASEGAWA, Y HUBER, J IWASAKI, Y JACQUES, P JOHNSON, RA KALELKAR, M KAWAHARA, H KWON, Y LEITH, DWGS LIU, X LU, A MANLY, S MARTINEZ, J MATHYS, L MCCULLOCH, M MCHUGH, S MCSHURLEY, D MULLER, G MULLER, D NAGAMINE, T NUSSBAUM, M PAVEL, TJ PETERSON, H PLANO, R RATCLIFF, B REIF, R RENSING, P SANTHA, AKS SCHNEIDER, M SCHULTZ, D SHANK, JT SHAPIRO, S SHAW, H SIMOPOULOS, C SNYDER, J SOKOLOFF, MD SOLODOV, E STAMER, P STOCKDALE, I SUEKANE, F TOGE, N TURK, J VAVRA, J WATT, R WEBER, T WHITAKER, JS WILLIAMS, DA WILLIAMS, SH WILSON, RJ WORD, G YELLIN, S YUTA, H TI THE FLUID SYSTEMS FOR THE SLD CHERENKOV RING IMAGING DETECTOR SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB We describe the design and operation of the fluid delivery, monitor and control systems for the SLD barrel Cherenkov Ring Imaging Detector (CRID). The systems deliver drift gas (C2H6+TMAE), radiator gas (C5F12+N2) and radiator liquid (C6F14). MeasUred critical quantities such as electron lifetime in the drift gas and ultra-violet (UV) transparencies of the radiator fluids, together with the operational experience, are also reported. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. RUTGERS UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08855. UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106. UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064. YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511. BOSTON UNIV,DEPT PHYS,BOSTON,MA 02215. UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221. COLORADO STATE UNIV,DEPT PHYS,FT COLLINS,CO 80523. NOVOSIBIRSK NUCL PHYS INST,NOVOSIBIRSK 630090,RUSSIA. UNIV ESTADUAL PAULISTA,BR-15054-000 SAO PAULO,BRAZIL. RP ABE, K (reprint author), TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN. RI Cavalli-Sforza, Matteo/H-7102-2015 NR 11 TC 4 Z9 4 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 593 EP 597 DI 10.1109/23.256623 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100053 ER PT J AU LINDSEY, CS DENBY, B HAGGERTY, H AF LINDSEY, CS DENBY, B HAGGERTY, H TI DRIFT CHAMBER TRACKING WITH NEURAL NETWORKS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB We discuss drift chamber tracking with a commercial analog VLSI neural network chip. Voltages proportional to the drift times in a 4-layer drift chamber were presented to the Intel ETANN chip. The network was trained to provide the intercept and slope of straight tracks traversing the chamber. The outputs were recorded and later compared off line to conventional track fits. Two types of network architectures were studied. Applications of neural network tracking to high energy physics detector triggers is discussed. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 607 EP 614 DI 10.1109/23.256626 PN 1 PG 8 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100056 ER PT J AU BISELLO, D WYSS, J ZDARKO, R AF BISELLO, D WYSS, J ZDARKO, R TI THE DEPENDENCE OF PULSE-HEIGHT ON ANODE DIAMETER AND GAS-COMPOSITION IN LIMITED STREAMER TUBES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID MIXTURES AB We present some results of a study of charge spectra using plastic streamer tubes as a function of anode diameters and for an extensive selection of three component gas mixtures of argon,isobutane, and carbon dioxide. Chambers instrumented with longitudinal strip and pad readout were constructed with plastic streamer tubes using anode wires of one of six different diameters: 25, 50, 75, 100, 150, 200 mum. The six chambers were simultaneously triggered by cosmic-ray muons and the charge distributions were recorded for various voltages and gas mixtures. An unexpected scaling law may be at work during the transition to streamer mode. C1 UNIV PADUA,DIPARTIMENTO FIS,I-35100 PADUA,ITALY. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. RP BISELLO, D (reprint author), INFN,I-35100 PADUA,ITALY. NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 637 EP 641 DI 10.1109/23.256631 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100061 ER PT J AU BALDWIN, GT LANDRON, CO LORENCE, LJ AF BALDWIN, GT LANDRON, CO LORENCE, LJ TI EXTENDING THE RANGE OF THE TIME PROJECTION COMPTON SPECTROMETER TO LOWER ENERGY SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB The Time Projection Compton Spectrometer (TPCS) has previously been used with a 12.7-mum-thick polypropylene target to measure the time-integrated energy spectrum of intense flash x-ray sources. We have now investigated application of the TPCS to photoelectron spectrometry, substituting a 2-mum thick gold target to improve device sensitivity to low-energy photons. Experiments with a gold, polypropylene and no target (background) were done at the Saturn pulsed x-ray source for various endpoint bremsstrahlung up to about 2 MV. Response functions were calculated using the TIGERP electron/photon Monte Carlo code. The signal from gold is larger and persists longer, as expected. However, the spectrum unfold from the gold signals has problems. Alternate approaches to the unfold problem that combine data from both targets may prove more successful. If so, a future spectrometer design could incorporate both low-Z and high-Z targets simultaneously in a single instrument. RP BALDWIN, GT (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 664 EP 668 DI 10.1109/23.256637 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100067 ER PT J AU MILGROME, OB KLEINFELDER, SA AF MILGROME, OB KLEINFELDER, SA TI A MONOLITHIC CMOS 16 CHANNEL, 12 BIT, 10 MICROSECOND ANALOG-TO-DIGITAL CONVERTER INTEGRATED-CIRCUIT SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB A monolithic CMOS 16 channel, 12 bit, 10 microsecond analog to digital converter has been designed and tested. The circuit converts 16 channels in parallel via a single slope ramp and Gray code counter algorithm. When biased for 10.0 us conversion s of a 2 V input range into 4050 voltage bins, and ohmically connected to a computer, initial testing shows typical performance is a noise level of 0.3 bins rms, integral nonlinearity of 4 bins, adjacent channel crosstalk effects less than 1 bin, and total chip power consumption of 110 mW. The chip contains 16 sample and hold circuits, out of range logic, a Gray-to-binary converter, and tri-state data outputs for microprocessor compatibility. The die size is 4.4 by 1.5 mm in a 2 polysilicon, 1.2 micron feature size CMOS process, and has 52 bonding pads. Off chip requirements are a single power supply, a single high speed clock, a precision voltage reference, three biasing resistors, and supply filtering capacitors. This custom circuit has advantages of lower power dissipation and less PC board area than competitive approaches, and is designed for further monolithic system integration. Design details and test results are presented. RP MILGROME, OB (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 4 TC 6 Z9 6 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 721 EP 723 DI 10.1109/23.256648 PN 1 PG 3 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100077 ER PT J AU CRAWLEY, HB MCKAY, R MEYER, WT ROSENBERG, EI THOMAS, WD AF CRAWLEY, HB MCKAY, R MEYER, WT ROSENBERG, EI THOMAS, WD TI TESTING ADCS AT SAMPLE RATES FROM 20 TO 120 MSPS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID FLASH ADCS; PERFORMANCE; RANGE AB We present results from an on-going program to test the performance of high speed analog to digital converters suitable for use at the. SSC and LHC colliders. For each device we have measured a large number of parameters such as number of effective bits, noise level, aperture jitter, nonlinearity, analog bandwidth, and total harmonic distortion. In this report, present results from a variety of eight- and ten-bit devices. We will continue this work, extending it to twelve-bit devices as they become available. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. RP CRAWLEY, HB (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011, USA. NR 5 TC 4 Z9 4 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 729 EP 732 DI 10.1109/23.256650 PN 1 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100079 ER PT J AU ZIMMERMAN, T SARRAJ, M YAREMA, R AF ZIMMERMAN, T SARRAJ, M YAREMA, R TI DESIGN OF AN ADVANCED READOUT CHIP FOR SILICON STRIP DETECTORS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID ANALOG AB Work was begun in 1990 on the development of an advanced readout chip (ARC) for silicon strip detectors. Features of the proposed device include compatibility with close bunch spacing and double sided detectors, and on chip analog storage, digitization, and data sparsification. Chips have been designed to check all of these concepts, fabricated in the VTI 2 micron process, and tested. The circuit configurations and test results are presented in this paper. RP ZIMMERMAN, T (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 8 TC 8 Z9 8 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 736 EP 739 DI 10.1109/23.256652 PN 1 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100081 ER PT J AU RADEKA, V RESCIA, S MANFREDI, PF SPEZIALI, V SVELTO, F AF RADEKA, V RESCIA, S MANFREDI, PF SPEZIALI, V SVELTO, F TI JFET MONOLITHIC PREAMPLIFIER WITH OUTSTANDING NOISE BEHAVIOR AND RADIATION HARDNESS CHARACTERISTICS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB A second series of monolithic preamplifiers based on epitaxial channel JFETs and intended for calorimetry at hadron colliders has been realised. The employed buried layer process has been upgraded, resulting in a lower pinch-off voltage and a reduced power dissipation. Results will be presented on noise, dynamic behaviour and radiation damage. New versions of the preamplifier have been designed for both-large capacitance detectors and for low capacitance pre-shower C1 UNIV PAVIA,DIPARTIMENTO ELETTRON,I-27100 PAVIA,ITALY. INFN,I-20133 MILAN,ITALY. RP RADEKA, V (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI Rescia, Sergio/D-8604-2011 OI Rescia, Sergio/0000-0003-2411-8903 NR 9 TC 15 Z9 19 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 744 EP 749 DI 10.1109/23.256654 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100083 ER PT J AU YAREMA, RJ FOSTER, GW HOFF, J SARRAJ, M ZIMMERMAN, T AF YAREMA, RJ FOSTER, GW HOFF, J SARRAJ, M ZIMMERMAN, T TI A FAST, WIDE-RANGE CHARGE INTEGRATOR AND ENCODER ASIC FOR PHOTOMULTIPLIER TUBES SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB A high speed wide range pipelined integrator and encoder ASIC for fast digitization of charge from photomultiplier tubes is under development at Fermilab. The ASIC is intended to operate in conjunction with a FADC to digitize signals from a charge source over a dynamic range of 18-20 bits with 8-10 bits of accuracy every 16 ns. Development of the device called QIE (charge integrator and encoder) is being carried out in an IC process with CMOS and NPN devices. Many chips have been designed and tested to prove the feasibility of the device. RP YAREMA, RJ (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 2 TC 14 Z9 14 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 750 EP 752 DI 10.1109/23.256655 PN 1 PG 3 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100084 ER PT J AU CHILES, MM MIHALCZO, JT FOWLER, CE AF CHILES, MM MIHALCZO, JT FOWLER, CE TI SMALL, ANNULAR, DOUBLE-CONTAINED CF-252 FISSION CHAMBER FOR SOURCE-DRIVEN SUBCRITICALITY MEASUREMENTS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB This paper describes a small diameter, double contained Cf-252 fission chamber design that can be inserted into a 0.95-cm (0.375 in) diameter hole or tube such as the control rod guide tubes in pressurized water reactor (PWR) fuel elements. Thus, this fission chamber can be used is a neutron driver for subcriticality measurements with irradiated PWR fuel elements. This prototype contains approximately 0.1 mug of Cf-252, but the design has flexibility to accommodate larger amounts of fissionable material required for PWR tests. Details Of the design are presented as well as some of the instrument's opperational parameters and performance characteristics. RP CHILES, MM (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 3 TC 1 Z9 2 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 816 EP 818 DI 10.1109/23.256667 PN 1 PG 3 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100096 ER PT J AU MACARTHUR, DW ALLANDER, KS BOUNDS, JA CATLETT, MM CARESS, RW RUTHERFORD, DA AF MACARTHUR, DW ALLANDER, KS BOUNDS, JA CATLETT, MM CARESS, RW RUTHERFORD, DA TI ALPHA-CONTAMINATION MONITORING OF SURFACES, OBJECTS, AND ENCLOSED AREAS SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB The usefulness of traditional alpha detectors for contamination monitoring is limited by the size and sensitivity of the detectors and by the short range of alpha particles in air. The long-range alpha detector (LRAD) detects the ions produced by the alpha particles passing through air, rather than the alpha particles themselves, limiting LRAD detection by the range of the ions (tens of meters), rather than the range of the alpha particles (a few centimeters). Since the LRAD collects all ions simultaneously, an LRAD monitor will be sensitive to all of the sources of contamination contained within it. The electronic noise within the LRAD can be reduced so that better sensitivity than traditional detectors is also possible. These advantages are used in the object, pipe and duct, floor, and soil surface monitors addressed in this paper. We discuss the design of these monitors as well as field test results. RP MACARTHUR, DW (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 5 TC 3 Z9 6 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 840 EP 845 DI 10.1109/23.256671 PN 1 PG 6 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100100 ER PT J AU PRIEDHORSKY, WC BLOCH, JJ WALLIN, SP ARMSTRONG, WT SIEGMUND, OHW GRIFFEE, J FLEETER, R AF PRIEDHORSKY, WC BLOCH, JJ WALLIN, SP ARMSTRONG, WT SIEGMUND, OHW GRIFFEE, J FLEETER, R TI THE ALEXIS SMALL SATELLITE PROJECT - BETTER, FASTER, CHEAPER FACES REALITY SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB ALEXIS is one of the most sophisticated miniature satellites developed to date, and the first satellite project led by Los Alamos National Laboratory. It carries both soft X-ray astrophysics and ionospheric physics experiments. As such, it is an example for experimenters who desire better, faster, and access to space. The satellite was launch-ready 3 1/2 years after concePt. The soft X-ray experiment, ALEXIS, is a novel set of wide-angle,normal incidence telescopes which scan half the sky every satellite rotation. BLACKBEARD is a broad-band receiver and digitizer designed to study ionospheric propagation in the 25-175 MHz band. The spin-stabilized spacecraft is compact and efficient; for example, it provides 50 Watts to the payload while consuming 10 Watts itself. ALEXIS will fly on a Pegasus air-launched booster We discuss the ALEXIS integration history and lessons learned therein. C1 UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RP PRIEDHORSKY, WC (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. OI Priedhorsky, William/0000-0003-0295-9138 NR 4 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 863 EP 873 DI 10.1109/23.256675 PN 1 PG 11 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100104 ER PT J AU STURROCK, JC COHEN, S WEINTRAUB, BL HAYDEN, DJ ARCHULETTA, SF AF STURROCK, JC COHEN, S WEINTRAUB, BL HAYDEN, DJ ARCHULETTA, SF TI TESTING AND INTERFACING INTELLIGENT POWER-SUPPLIES FOR THE LOS-ALAMOS-NATIONAL-LABORATORY ACCELERATOR COMPLEX SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE AB New high-current, high-precision microprocesssor-controlled power supplies, built by Alpha Scientific Electronics of Hayward, CA, have been installed at the Los Alamos National Laboratory Accelerator Complex. Each unit has sophisticated microprocessor control-on-board and communicates via RS-422 (serial communications). The units use a high level ASCII-based control protocol. Performance tests were conducted to verify adherence to specification and to ascertain ultimate long-term stability. The ''front-end'' software used by the accelerator control system has been written to accommodate these new devices. The supplies are interfaced to the control system through a terminal server port connected to the site-wide ethernet backbone. Test design and results as well as details of the software implementation for the analog and digital control of the supplies through the accelerator control system are presented. RP STURROCK, JC (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 939 EP 945 DI 10.1109/23.256689 PN 1 PG 7 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100118 ER PT J AU MOSES, WW DERENZO, SE NUTT, R DIGBY, WM WILLIAMS, CW ANDREACO, M AF MOSES, WW DERENZO, SE NUTT, R DIGBY, WM WILLIAMS, CW ANDREACO, M TI PERFORMANCE OF A PET DETECTOR MODULE UTILIZING AN ARRAY OF SILICON PHOTODIODES TO IDENTIFY THE CRYSTAL OF INTERACTION SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article; Proceedings Paper CT 1992 IEEE NUCLEAR SCIENCE SYMP / MEDICAL IMAGING CONF ( NSS/MIC ) CY OCT 25-31, 1992 CL ORLANDO, FL SP IEEE ID POSITRON EMISSION TOMOGRAPHY; BISMUTH-GERMANATE; RESOLUTION AB We present initial performance results for a new multi-layer PET detector module consisting of an array of 3 mm square by 30 mm deep BGO crystals coupled on one end to a single photomultiplier, tube and on the opposite end to an array of 3 mm square silicon photodiodes. The photomultiplier tube provides an accurate timing pulse and energy discrimination for the all the crystals in the module, while the silicon photodiodes identify the crystal of interaction. When a. single BGO crystal at +25-degrees-C is excited with 511 keV photons, we measure a photodiode signal centered at 700 electrons (e-) with noise of 375 e- fwhm. When a four-crystal/photodiode module is excited with a collimated line source of 511 keV photons, the crystal of interaction is correctly identified 82% of the time. The misidentification rate can be greatly reduced and an 8 x 8 crystal/photodiode module constructed by using thicker depletion layer photodiodes or cooling to 0-degrees-C. C1 CTI INC,KNOXVILLE,TN 37933. RP MOSES, WW (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 10 TC 29 Z9 29 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 1036 EP 1040 DI 10.1109/23.256708 PN 1 PG 5 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV991 UT WOS:A1993LV99100137 ER PT J AU ANGSTADT, R JOHNSON, ME MARTIN, MI MATULIK, MS UTES, M AF ANGSTADT, R JOHNSON, ME MARTIN, MI MATULIK, MS UTES, M TI DESIGN OF A HARDWARE TESTING SYSTEM FOR THE D-ZERO DETECTOR SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE LA English DT Article AB Testing a system as large as the D Zero data acquisition system is difficult. The use of IBM compatible personal computers in a hardware test system that can run on any size system from an engineer's test bench to the entire subsystem in the D Zero Detector is described. The test system uses a PC to VME bus inter-face for the local testing and the Token Ring network for more global testing. This system has been implemented for several different hardware systems in D Zero. RP ANGSTADT, R (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0018-9499 J9 IEEE T NUCL SCI JI IEEE Trans. Nucl. Sci. PD AUG PY 1993 VL 40 IS 4 BP 1282 EP 1285 PN 2 PG 4 WC Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA LV992 UT WOS:A1993LV99200009 ER PT J AU SMITH, JR HAUER, JF TRUDNOWSKI, DJ AF SMITH, JR HAUER, JF TRUDNOWSKI, DJ TI TRANSFER-FUNCTION IDENTIFICATION IN POWER-SYSTEM APPLICATIONS SO IEEE TRANSACTIONS ON POWER SYSTEMS LA English DT Article; Proceedings Paper CT 1992 SUMMER MEETING OF THE POWER-ENGINEERING-SOC OF IEEE CY JUL 12-16, 1992 CL SEATTLE, WA SP IEEE, POWER ENGN SOC ID SMALL-SIGNAL STABILITY; MODEL-REDUCTION AB This paper presents an introduction to concepts and applications of transfer function identification in power systems. The Paper begins with a brief introduction to transfer function identification methods using least-squares approaches and then discusses applications which include SVC's, model validation applications, and software validation. A comparison is also made between eigenvalues obtained from transfer function identification and small signal analysis. Methods for testing the validity of identified transfer functions are also discussed. C1 BONNEVILLE POWER ADM, PORTLAND, OR 97208 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP SMITH, JR (reprint author), MONTANA STATE UNIV, BOZEMAN, MT 59717 USA. NR 24 TC 68 Z9 82 U1 0 U2 0 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0885-8950 J9 IEEE T POWER SYST JI IEEE Trans. Power Syst. PD AUG PY 1993 VL 8 IS 3 BP 1282 EP 1290 DI 10.1109/59.260866 PG 9 WC Engineering, Electrical & Electronic SC Engineering GA MC224 UT WOS:A1993MC22400065 ER PT J AU KEPLER, TB PERELSON, AS AF KEPLER, TB PERELSON, AS TI CYCLIC REENTRY OF GERMINAL CENTER B-CELLS AND THE EFFICIENCY OF AFFINITY MATURATION SO IMMUNOLOGY TODAY LA English DT Review ID PRIMARY IMMUNE-RESPONSE; SOMATIC HYPERMUTATION; SECONDARY RESPONSES; INCREASE AFFINITY; ANTIBODY; MUTATION; SELECTION; ANTIGEN; (4-HYDROXY-3-NITROPHENYL)ACETYL; REPERTOIRE AB Affinity maturation of the humoral immune response by somatic hypermutation is marked by a rapid and dramatic increase in affinity for the eliciting antigen. We suggest that the optimal mutation schedule is one in which periods of rapid mutation alternate with periods of mutation-free growth. The multicompartmental structure of the germinal center, together with re-entry of positively selected B cells back into the germinal center, will naturally implement such a schedule, thereby providing an anatomical basis for the efficiency of the germinal center reaction. C1 N CAROLINA STATE UNIV,BIOMATH PROGRAM,RALEIGH,NC 27695. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP KEPLER, TB (reprint author), SANTA FE INST,1660 OLD PECOS TRAIL,SANTA FE,NM 87501, USA. OI Kepler, Thomas/0000-0002-1383-6865 FU NCRR NIH HHS [RR06555]; NIAID NIH HHS [AI28433] NR 30 TC 168 Z9 170 U1 0 U2 7 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0167-5699 J9 IMMUNOL TODAY JI Immunol. Today PD AUG PY 1993 VL 14 IS 8 BP 412 EP 415 DI 10.1016/0167-5699(93)90145-B PG 4 WC Immunology SC Immunology GA LQ735 UT WOS:A1993LQ73500012 PM 8397781 ER PT J AU SEALOCK, LJ ELLIOTT, DC BAKER, EG BUTNER, RS AF SEALOCK, LJ ELLIOTT, DC BAKER, EG BUTNER, RS TI CHEMICAL-PROCESSING IN HIGH-PRESSURE AQUEOUS ENVIRONMENTS .1. HISTORICAL-PERSPECTIVE AND CONTINUING DEVELOPMENTS SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Review ID WET OXIDATION; ORGANIC-COMPOUNDS; OXIDE; WATER AB Use of high-temperature pressurized liquid water has been investigated as a reaction medium for conducting chemical reactions and conversion. Results of these studies have demonstrated that high-temperature pressurized liquid water, especially in the presence of suitable catalysts, has unique chemical and physical properties. An overview of fundamental investigations and processing considerations in this environment is presented including details regarding the effects of temperature, pressure, and catalysis. The reactivities of various feedstocks tested are discussed along with the development and scale-up of high-pressure reactor systems used to investigate the process chemistry and engineering. Several new processing concepts were developed for gasification, destruction, and gas processing based on these findings. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 45 TC 78 Z9 80 U1 2 U2 21 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD AUG PY 1993 VL 32 IS 8 BP 1535 EP 1541 DI 10.1021/ie00020a001 PG 7 WC Engineering, Chemical SC Engineering GA LT659 UT WOS:A1993LT65900001 ER PT J AU ELLIOTT, DC SEALOCK, LJ BAKER, EG AF ELLIOTT, DC SEALOCK, LJ BAKER, EG TI CHEMICAL-PROCESSING IN HIGH-PRESSURE AQUEOUS ENVIRONMENTS .2. DEVELOPMENT OF CATALYSTS FOR GASIFICATION SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID NICKEL; METHANATION; HYDROCARBONS AB A liquid water processing environment was used at 20 MPa and 350-degrees-C to convert organic compounds to methane and carbon dioxide in the presence of catalysts. This paper describes the evaluation of various types of base and noble metal catalysts and numerous support compositions for the process. The feedstock used in these tests was a mixture of p-cresol and water. Nickel, ruthenium, and rhodium were identified as active metals for the reaction. Other metals from groups VIII, VIB, IB, and IIB were inactive or readily oxidized and lost activity. Stable supports in the processing environment included alpha-alumina and zirconia. Silica and titania did not react chemically, but the tablet forms lost their physical integrity. Alumina forms, other than alpha-alumina, reacted with water to form bohmite (gamma-AlOOH) with significant loss of surface area and physical strength. RP ELLIOTT, DC (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 23 TC 174 Z9 184 U1 3 U2 36 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD AUG PY 1993 VL 32 IS 8 BP 1542 EP 1548 DI 10.1021/ie00020a002 PG 7 WC Engineering, Chemical SC Engineering GA LT659 UT WOS:A1993LT65900002 ER PT J AU WESTERBERG, AW WESTERBERG, KM WESTERBERG, KW CHUNG, Y SAFRIT, B AF WESTERBERG, AW WESTERBERG, KM WESTERBERG, KW CHUNG, Y SAFRIT, B TI WHY STANDARD INTEGRATION PACKAGES FAIL ON A NEAR INDEX PROBLEM SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Note AB We examine the analytical behavior of a ''near index'' problem which Chung and Westerberg used as an example to illustrate their newly proposed algorithm for solving such problems. The example problem has both a stiff and an unstable component, the latter causing both implicit (in principle) and explicit (in practice because of round-off error) numerical methods to diverge when attempting to track its known finite solution. We explain why the numerical method of Chung and Westerberg, which corresponds to a perturbation expansion of the problem around the index problem to which it is close, has no difficulty in finding this solution. C1 PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544. CARNEGIE MELLON UNIV,ENGN DESIGN RES CTR,PITTSBURGH,PA 15213. KOREA INST SCI & TECHNOL,SEOUL,SOUTH KOREA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP WESTERBERG, AW (reprint author), CARNEGIE MELLON UNIV,DEPT CHEM ENGN,PITTSBURGH,PA 15213, USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0888-5885 J9 IND ENG CHEM RES JI Ind. Eng. Chem. Res. PD AUG PY 1993 VL 32 IS 8 BP 1798 EP 1799 DI 10.1021/ie00020a039 PG 2 WC Engineering, Chemical SC Engineering GA LT659 UT WOS:A1993LT65900039 ER PT J AU GOLDBERG, LA AF GOLDBERG, LA TI AUTOMATING POLYA THEORY - THE COMPUTATIONAL-COMPLEXITY OF THE CYCLE INDEX POLYNOMIAL SO INFORMATION AND COMPUTATION LA English DT Article RP GOLDBERG, LA (reprint author), SANDIA NATL LABS,DEPT ALGORITHMS & DISCRETE MATH,DEPT 1423,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 8 TC 5 Z9 5 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 0890-5401 J9 INFORM COMPUT JI Inf. Comput. PD AUG PY 1993 VL 105 IS 2 BP 268 EP 288 DI 10.1006/inco.1993.1045 PG 21 WC Computer Science, Theory & Methods; Mathematics, Applied SC Computer Science; Mathematics GA LN502 UT WOS:A1993LN50200002 ER PT J AU HASSANI, AV HOLLANDS, KGT RAITHBY, GD AF HASSANI, AV HOLLANDS, KGT RAITHBY, GD TI A CLOSE UPPER BOUND FOR THE CONDUCTION SHAPE FACTOR OF A UNIFORM THICKNESS, 2D LAYER SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER LA English DT Note ID HOLLOW C1 UNIV WATERLOO,DEPT MECH ENGN,WATERLOO N2L 3G1,ONTARIO,CANADA. RP HASSANI, AV (reprint author), NATL RENEWABLE ENERGY LAB,THERMAL SCI & ENGN BRANCH,BLDG ENERGY TECHNOL PROGRAM,GOLDEN,CO 80401, USA. NR 14 TC 3 Z9 3 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0017-9310 J9 INT J HEAT MASS TRAN JI Int. J. Heat Mass Transf. PD AUG PY 1993 VL 36 IS 12 BP 3155 EP 3158 DI 10.1016/0017-9310(93)90044-7 PG 4 WC Thermodynamics; Engineering, Mechanical; Mechanics SC Thermodynamics; Engineering; Mechanics GA LN708 UT WOS:A1993LN70800020 ER PT J AU DEAN, DJ BOTTCHER, C STRAYER, MR AF DEAN, DJ BOTTCHER, C STRAYER, MR TI SPLINE TECHNIQUES FOR SOLVING RELATIVISTIC CONSERVATION EQUATIONS SO INTERNATIONAL JOURNAL OF MODERN PHYSICS C LA English DT Article DE RELATIVISTIC HYDRODYNAMICS; BASIS-SPLINE COLLOCATION METHOD ID HEAVY-ION COLLISIONS; FLUX-CORRECTED TRANSPORT; QUARK-GLUON PLASMA; MODEL; HYDRODYNAMICS; ALGORITHM; DYNAMICS; LATTICE AB We discuss a new numerical method for solving the relativistic hydrodynamic equations based upon the basis-spline collocation approach. Analytical and numerical results are compared for several problems, including one-dimensional expansions and collisions for which analytical solutions exist. Our methods, which may be easily and massively parallelized, are shown to give numerical results which agree to within a few percent of the analytic solutions. We discuss the relevance of the v = z/t scaling solutions for the one-dimensional problem when applied to relativistic heavy-ion collisions. Finally, we discuss applications to three-dimensional problems, and present results for a typical three-dimensional expansion. RP OAK RIDGE NATL LAB, CTR COMP INTENS PHYS, DIV PHYS, OAK RIDGE, TN 37831 USA. NR 28 TC 2 Z9 2 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0129-1831 EI 1793-6586 J9 INT J MOD PHYS C JI Int. J. Mod. Phys. C PD AUG PY 1993 VL 4 IS 4 BP 723 EP 747 DI 10.1142/S0129183193000616 PG 25 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LU432 UT WOS:A1993LU43200001 ER PT J AU STRAUME, T LUCAS, JN AF STRAUME, T LUCAS, JN TI A COMPARISON OF THE YIELDS OF TRANSLOCATIONS AND DICENTRICS MEASURED USING FLUORESCENCE IN-SITU HYBRIDIZATION SO INTERNATIONAL JOURNAL OF RADIATION BIOLOGY LA English DT Note ID RADIATION AB Chromosome aberration analysis using fluorescence in situ hybridization (FISH) methods without centromere-specific markers results in the misscoring of a substantial fraction of the dicentrics as translocations; that is, too many translocations and too few dicentrics are scored. Such misscoring has led to considerable confusion in the rapidly emerging literature on FISH-based cytogenetics. Here, we demonstrate that the problem is fully resolved when centromeric probes are used. RP STRAUME, T (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA. NR 8 TC 83 Z9 83 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0955-3002 J9 INT J RADIAT BIOL JI Int. J. Radiat. Biol. PD AUG PY 1993 VL 64 IS 2 BP 185 EP 187 DI 10.1080/09553009314551281 PG 3 WC Biology; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA LW734 UT WOS:A1993LW73400007 PM 8103542 ER PT J AU BOGEN, KT AF BOGEN, KT TI REASSESSMENT OF HUMAN PERIPHERAL T-LYMPHOCYTE LIFE-SPAN DEDUCED FROM CYTOGENETIC AND CYTOTOXIC EFFECTS OF RADIATION SO INTERNATIONAL JOURNAL OF RADIATION BIOLOGY LA English DT Article ID CHROMOSOME-ABERRATIONS; IN-VITRO; B LYMPHOCYTES; BREAST-CANCER; IRRADIATION; BLOOD; THERAPY; CELLS; VIVO; RADIOSENSITIVITY AB Estimates of the mean lifetime of human peripheral blood T-lymphocytes (PBTL) have ranged from 1.5 to 10 year. To derive an improved estimate, kinetic and dose parameters of four deterministic, two-compartment models of loss and replacement of human peripheral blood lymphocytes (PBL) were fitted to a previously published extensive data set on loss of dicentrics plus rings (DR) in PBL sampled from X-ray-treated ankylosing spondylitis patients for > 20-year-post-treatment, involving a fixed external-dose regimen (with dose to PBL unknown). The four models investigated all incorporated fixed dose-response submodels for radiation-induced cytogenetic damage and cell killing that were based entirely on in vitro data for X-ray-exposed human PBTL. Two of the models are shown to provide a reasonably good prediction not only of the data on DR loss to which the models were fit, but also of corresponding data on recovery of the mean of measured total PBL. The modelling results indicate that it is unlikely that long-lived human recirculating 'memory' PBTL are homogeneous with respect to lifespan, but rather that two major subpopulations, T1 and T2, are involved having mean lifespans (and approximately 95% confidence limits) estimated to be approximately 1.1 (0.76-1-9) and approximately 6-3 (5.8-6.9) year, respectively. One of the two models consistent with the data posits that T1 (possibly 'short-term antigen-memory') cells are approximately 60% of recirculating T-lymphocytes that convert at a rate of approximately 9% year-1 into T2 (possibly 'long-term antigen-memory') cells, and that the T1 cells are virtually all derived from a central-body source such as thymus and/or central lymphatic tissues. RP BOGEN, KT (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV HLTH & ECOL ASSESSMENT,LIVERMORE,CA 94550, USA. NR 45 TC 31 Z9 33 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0955-3002 J9 INT J RADIAT BIOL JI Int. J. Radiat. Biol. PD AUG PY 1993 VL 64 IS 2 BP 195 EP 204 DI 10.1080/09553009314551301 PG 10 WC Biology; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA LW734 UT WOS:A1993LW73400009 PM 8103544 ER PT J AU JONES, TD MORRIS, MD YOUNG, RW AF JONES, TD MORRIS, MD YOUNG, RW TI MATHEMATICAL-MODELS OF MARROW CELL-KINETICS - DIFFERENTIAL-EFFECTS OF PROTRACTED IRRADIATIONS ON STROMAL AND STEM-CELLS IN MICE SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE CELL KINETICS; RADIATION RECOVERY; MYELOPOIESIS; RADIOTHERAPY; STEM CELL; STROMA CELL ID DOUBLE-STRAND BREAKS; RADIATION-INDUCED MYELOPOIESIS; COLONY-FORMING-UNITS; MOUSE BONE-MARROW; X-RAYS; PROGENITOR CELLS; IONIZING-RADIATION; DNA DAMAGE; RADIOSENSITIVITY; PROLIFERATION AB It is known that hematopoiesis is supported by bone-marrow stem cells, but those cells must seed and grow on a stromal microenvironment. Typically, studies have shown that a surviving fraction of about 30 hematopoietic stem cells (HSCs) (i.e., about 0.04%) correspond to the LD50, although other studies have shown that marrow can repopulate from a single viable cell under strong regiments of antibiotics and infusions of irradiated blood elements. Purpose: This paper describes comparisons between our results (from maximum-likelihood estimation techniques for cellular damage, repair, and compensatory repopulation) and published experimental data on marrow stromal cells. Methods and Materials: After biophysical consideration of the rate constants that were derived by maximizing the likelihood function (a consideration necessary to extend the model to cell populations not indicated by the model as ''critical'' for recovery), the rate constants for cellular damage to stem cells are fitted to experimental data. Rate constants for repair and proliferation of stem cells are assigned based on published data on repair/proliferation halftimes, and these assignments affect the evaluation of the rate constants for cellular damage. From the two models, that is one for ''critical'' cells (having radiosensitive and repopulation characteristics similar to stromal cells) and another for stem cells, effects on two cell populations of different radiosensitivities and repopulation rates can be demonstrated for complex schedules of protracted irradiations which could reduce either cell population below a critical need for marrow repopulation. Results: Our analysis of animal mortality data has indicated that recovery of an animal from potentially lethal irradiation is dominantly regulated by cells with survival and repopulation characteristics similar to those of stroma cells. Conclusion: In contrast to the surviving fraction of hematopoietic stem cells, it appears that the probability of an animal's recovery is high if the ''critical'' population of cells is above 1% (our ''best'' maximum likelihood estimate, from mouse data, with the corresponding lower confidence bound at about 0.2%). Of course, a few stem cells-perhaps only one-must maintain a potential for repopulation of blood and marrow. C1 OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,OAK RIDGE,TN 37831. DEF NUCL AGCY,RADIAT POLICY OFF,WASHINGTON,DC 20305. RP JONES, TD (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,BLDG 4500-S MS 6101,POB 2008,OAK RIDGE,TN 37831, USA. NR 83 TC 17 Z9 17 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0360-3016 J9 INT J RADIAT ONCOL JI Int. J. Radiat. Oncol. Biol. Phys. PD AUG 1 PY 1993 VL 26 IS 5 BP 817 EP 830 PG 14 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA LR644 UT WOS:A1993LR64400012 PM 8344851 ER PT J AU BUDINGER, TF AF BUDINGER, TF TI FUTURE-DEVELOPMENTS IN POSITRON-EMISSION TOMOGRAPHY FOR INCORPORATION INTO THE CLINICAL SPHERE SO INVESTIGATIVE RADIOLOGY LA English DT Article C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP BUDINGER, TF (reprint author), UNIV CALIF SAN FRANCISCO,DEPT RADIOL,SAN FRANCISCO,CA 94143, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0020-9996 J9 INVEST RADIOL JI Invest. Radiol. PD AUG PY 1993 VL 28 SU 3 BP S142 EP S143 DI 10.1097/00004424-199308003-00068 PG 2 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA LR619 UT WOS:A1993LR61900069 PM 8376035 ER PT J AU DAS, SK CHAUBAL, M HUGLEN, R TONTI, RT MCLEOD, DN STEWART, D ORTH, R AF DAS, SK CHAUBAL, M HUGLEN, R TONTI, RT MCLEOD, DN STEWART, D ORTH, R TI LIGHT-METALS 1993 - ADVANCES IN ALUMINUM PRODUCTION SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Editorial Material C1 REYNOLDS MET CO, RICHMOND, VA 23261 USA. ALCOA TECH CTR, ALCOA CTR, PA USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD AUG PY 1993 VL 45 IS 8 BP 15 EP 20 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA LR479 UT WOS:A1993LR47900002 ER PT J AU RAVI, VA LESUER, DR AF RAVI, VA LESUER, DR TI CONSIDERING FUTURE-DIRECTIONS IN STRUCTURAL-MATERIALS SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Note C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP RAVI, VA (reprint author), LANXIDE CORP,NEWARK,DE, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD AUG PY 1993 VL 45 IS 8 BP 39 EP 39 PG 1 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA LR479 UT WOS:A1993LR47900008 ER PT J AU LESUER, DR SYN, CK GOLDBERG, A WADSWORTH, J SHERBY, OD AF LESUER, DR SYN, CK GOLDBERG, A WADSWORTH, J SHERBY, OD TI THE CASE FOR ULTRAHIGH-CARBON STEELS AS STRUCTURAL-MATERIALS SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article ID FERROUS LAMINATED COMPOSITES; IMPACT PROPERTIES; SUPERPLASTIC BEHAVIOR; ELEVATED-TEMPERATURE; MECHANICAL-BEHAVIOR; DAMASCUS STEELS; IRON POWDERS; BRASS; MICROSTRUCTURES AB Ultrahigh-carbon steels (UHCSs)are low-alloyed plain carbon steels containing 1-2.1 % carbon. These steels have remarkable structural properties when processed to achieve fine ferrite grains with fine spheroidized carbides. They can be made superplastic at intermediate temperatures. Further, they can be made hard with compression toughness and strong with good tensile ductility at ambient temperatures. Contrary to conventional wisdom, UHCSs are ideal replacements for currently used high-carbon (0.5-1 % carbon) steels because they have comparable ductility but higher strength and hardness. In this article, examples of structural components formed from fine-grained spheroidized UHCSs are illustrated, and other potential structural applications are reviewed. These steels can be laminated with other metal-based materials to achieve superplasticity, high impact resistance, exceptionally high tensile ductility, and improved fatigue behavior. C1 STANFORD UNIV, DEPT MAT SCI & ENGN, STANFORD, CA 94305 USA. RP LESUER, DR (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 82 TC 52 Z9 58 U1 4 U2 14 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD AUG PY 1993 VL 45 IS 8 BP 40 EP 46 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA LR479 UT WOS:A1993LR47900009 ER PT J AU DETERESA, SJ AF DETERESA, SJ TI POLYMER COMPOSITES FOR LONG-TERM STRUCTURAL APPLICATIONS SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article AB The potential new markets for polymer-matrix fiber composites (PMCs) are in the commercial aircraft, transportation, machinery, marine, and public works industries. A common requirement for many of the envisioned applications is the need to withstand structural loading for extended periods of time. Although good design using PMCs usually implies exploiting the high strength and stiffness properties of the fiber reinforcement, this article demonstrates that the matrix and interface properties play primary roles in the long-term durability of these materials. RP DETERESA, SJ (reprint author), LAWRENCE LIVERMORE NATL LAB,POLYMER COMPOSITES GRP,LIVERMORE,CA 94550, USA. NR 12 TC 0 Z9 0 U1 1 U2 1 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 1047-4838 J9 JOM-J MIN MET MAT S JI JOM-J. Miner. Met. Mater. Soc. PD AUG PY 1993 VL 45 IS 8 BP 58 EP 62 PG 5 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA LR479 UT WOS:A1993LR47900013 ER PT J AU STANKER, LH MCKEOWN, C WATKINS, BE VANDERLAAN, M ELLIS, R RAJAN, J AF STANKER, LH MCKEOWN, C WATKINS, BE VANDERLAAN, M ELLIS, R RAJAN, J TI DETECTION OF DIMETRIDAZOLE AND OTHER NITROIMIDAZOLE RESIDUES IN TURKEY USING AN IMMUNOASSAY SO JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY LA English DT Article ID CHROMATOGRAPHIC DETERMINATION; MONOCLONAL-ANTIBODIES; IPRONIDAZOLE; METABOLITE; TISSUES AB A series of monoclonal antibodies were generated that can bind dimetridazole, a nitroimidazole drug used in veterinary medicine. A competition enzyme-linked immunosorption assay (cELISA) is described and is used to characterize the binding of these antibodies to a number of nitroimidazole drugs. The 50% inhibition of control occurred for the most sensitive of these antibodies at 12 ng/mL for dimetridazole, 75 ng/mL for hydroxydimetridazole, 25 ng/mL for ipronidazole, 2000 ng/mL for hydroxyipronidazole, and 20 000 ng/mL for metronidazole. An extraction method for these nitroimidazoles that is compatible with the immunoassay is described. Using this method, as little as 1 ng of dimetridazole could be detected in turkey muscle. C1 LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,DIV CHEM SCI,LIVERMORE,CA 94550. USDA,FOOD SAFETY INSPECT SERV,WASHINGTON,DC 20250. NR 20 TC 14 Z9 15 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0021-8561 J9 J AGR FOOD CHEM JI J. Agric. Food Chem. PD AUG PY 1993 VL 41 IS 8 BP 1332 EP 1336 DI 10.1021/jf00032a032 PG 5 WC Agriculture, Multidisciplinary; Chemistry, Applied; Food Science & Technology SC Agriculture; Chemistry; Food Science & Technology GA LT908 UT WOS:A1993LT90800032 ER PT J AU JOSHI, RP SCHOENBACH, KH MOLINA, C HOFER, WW AF JOSHI, RP SCHOENBACH, KH MOLINA, C HOFER, WW TI STUDIES OF ELECTRON-BEAM PENETRATION AND FREE-CARRIER GENERATION IN DIAMOND FILMS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; MONTE-CARLO SIMULATION; SWITCHES; ENERGY; SECONDARY; TARGETS AB Experimental observations of the energy-dependent electron-beam penetration in type II-A natural diamond are reported. The experimental data are compared with results obtained from numerical Monte Carlo simulations, and the results are in very good agreement. The results also reveal that a threshold energy of about 125 keV is necessary for complete penetration for a 35 mum sample. It is found that over the 30-180 keV range, the energy dependence of the penetration depth and total path length exhibits a power-law relation. Monte Carlo simulations have also been performed to investigate the excess carrier-generation profiles within diamond for a set of incident e-beam energy distributions. The simulation results demonstrate the feasibility of tailoring the internal source function, and hence influencing the diffusion currents, the internal electric fields, and charge injection through the contacts. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP JOSHI, RP (reprint author), OLD DOMINION UNIV,DEPT ELECT & COMP ENGN,NORFOLK,VA 23529, USA. NR 44 TC 8 Z9 8 U1 1 U2 2 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 AUG 1 PY 1993 VL 74 IS 3 BP 1568 EP 1574 DI 10.1063/1.354829 PG 7 WC Physics, Applied SC Physics GA LQ127 UT WOS:A1993LQ12700014 ER PT J AU NIELSEN, B HOLLAND, OW LEUNG, TC LYNN, KG AF NIELSEN, B HOLLAND, OW LEUNG, TC LYNN, KG TI DEFECTS IN MEV SI-IMPLANTED SI PROBED WITH POSITRONS SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID ELECTRON-IRRADIATED SILICON; ION-INDUCED DAMAGE; CRYSTALLINE SI; OXYGEN; BEAM; AMORPHIZATION AB Vacancy-type defects produced by implantation of MeV doses of Si ions (10(11)-10(15) atoms/cm2) at room temperature have been probed using depth-resolved positron annihilation spectroscopy. The defect (divacancy) concentration increases linearly with dose for low doses ( < 10(12) Si/cm2). In situ isochronal annealing was followed for oxygen-containing Si (10 ppm) and oxygen-''free'' Si implanted to doses (5 x 10(12) and 5 x 10(14) Si/cm2). Two main annealing stages were observed at the same temperatures in the studied samples in spite of significant differences in doses and oxygen content. In the first stage (approximately 200-degrees-C) a significant fraction of divacancies was observed to form large vacancy clusters. These clusters were removed in the second stage (approximately 675-degrees-C) after which the oxygen-free samples returned to pre-irradiation conditions, whereas oxygen-defect complexes were formed in the oxygen-containing samples. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP NIELSEN, B (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA. RI Nielsen, Bent/B-7353-2009 OI Nielsen, Bent/0000-0001-7016-0040 NR 17 TC 74 Z9 74 U1 1 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 AUG 1 PY 1993 VL 74 IS 3 BP 1636 EP 1639 DI 10.1063/1.354813 PG 4 WC Physics, Applied SC Physics GA LQ127 UT WOS:A1993LQ12700024 ER PT J AU ADDESSIO, FL JOHNSON, JN AF ADDESSIO, FL JOHNSON, JN TI RATE-DEPENDENT DUCTILE FAILURE MODEL SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID VOID NUCLEATION; FRACTURE; GROWTH; COALESCENCE AB A rate-dependent constitutive model for the dynamic deformation of ductile materials is developed. The model introduces a physical length scale into the equations governing the progressive failure of materials due to void growth. Consequently, mesh sensitivity or localization problems inherent to rate-independent models are precluded. The model is implemented into an explicit, finite-difference computer code. The insensitivity of the model to changes in the mesh size is demonstrated. Comparisons are provided between numerical simulations and data for uniaxial impact experiments. Excellent agreement is established between the final porosity levels and the width of the damage zone. Also, excellent agreement is provided for the stress histories, including the peak stress values and the spall signal. RP LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. NR 20 TC 36 Z9 38 U1 2 U2 9 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-8979 EI 1089-7550 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 1 PY 1993 VL 74 IS 3 BP 1640 EP 1648 DI 10.1063/1.354814 PG 9 WC Physics, Applied SC Physics GA LQ127 UT WOS:A1993LQ12700025 ER PT J AU WOOD, CEC TABATABAEI, SA SHELDON, P AF WOOD, CEC TABATABAEI, SA SHELDON, P TI RE-EVAPORATION EFFECTS AND OPTICAL-PROPERTIES OF MOLECULAR-BEAM-EPITAXIAL ALGAAS/GAAS/ALGAAS WELLS SO JOURNAL OF APPLIED PHYSICS LA English DT Article AB Elemental materials that condense on surfaces near effusion cells can be reevaporated toward substrates when heated by radiation from effusion furnaces. There they accumulate as unwanted impurities at interfaces and distribute throughout epitaxial films during growth. This effect is greatly increased when shutters are closed. Re-evaporated aluminum is shown to degrade minority-carrier properties of Al0.3Ga0.7As/GaAs double heterostructures. Modified temperature schedules and hardware to reduce re-evaporation effects are suggested. C1 LAB PHYS SCI,COLL PK,MD 20740. NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RP WOOD, CEC (reprint author), UNIV MARYLAND,DEPT ELECT ENGN,JOINT PROGRAM ADV ELECTRON MAT,COLL PK,MD 20740, USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD AUG 1 PY 1993 VL 74 IS 3 BP 1697 EP 1699 DI 10.1063/1.354823 PG 3 WC Physics, Applied SC Physics GA LQ127 UT WOS:A1993LQ12700035 ER PT J AU SAUERS, I MAHAJAN, SM AF SAUERS, I MAHAJAN, SM TI DETECTION OF S2F10 PRODUCED BY A SINGLE-SPARK DISCHARGE IN SF6 SO JOURNAL OF APPLIED PHYSICS LA English DT Note ID TRACE DISULFUR DECAFLUORIDE; SULFUR-HEXAFLUORIDE; DECOMPOSITION AB Improvement in detection sensitivity of S2F10 in SF6 down to concentrations below 10 parts per billion, using a cryogenic enrichment-gas chromatography technique, has permitted the detection of S2F10 produced by a single-spark discharge in SF6. The spark yield of S2F10 was found to fall in the range of yields found in earlier work on more highly decomposed SF6. Based on preliminary data the spark discharge may provide a suitable and reproducible reference source of S2F10. C1 TENNESSEE TECHNOL UNIV,DEPT ELECT ENGN,COOKEVILLE,TN 38505. RP SAUERS, I (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,POB 2008,MS 6123,OAK RIDGE,TN 37831, USA. NR 13 TC 6 Z9 7 U1 1 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 AUG 1 PY 1993 VL 74 IS 3 BP 2103 EP 2105 DI 10.1063/1.354731 PG 3 WC Physics, Applied SC Physics GA LQ127 UT WOS:A1993LQ12700102 ER PT J AU WOS, L AF WOS, L TI THE PROBLEM OF NAMING AND FUNCTION REPLACEMENT SO JOURNAL OF AUTOMATED REASONING LA English DT Article DE AUTOMATED REASONING; FUNCTION REPLACEMENT; NAMING; REPRESENTATION; UNSOLVED RESEARCH PROBLEM AB This article is the twenty-eighth of a series of articles discussing various open research problems in automated reasoning. The problem proposed for research asks one to find criteria that an automated reasoning program can profitably use to remove functions present in the representation and replace them with appropriate predicates or constants that name the entities that were named by the functions. The notation used to present a problem to a reasoning program can have a profound effect on the likelihood of the program's success. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. NR 6 TC 0 Z9 0 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0168-7433 J9 J AUTOM REASONING JI J. Autom. Reasoning PD AUG PY 1993 VL 11 IS 1 BP 147 EP 148 DI 10.1007/BF00881903 PG 2 WC Computer Science, Artificial Intelligence SC Computer Science GA MH625 UT WOS:A1993MH62500006 ER PT J AU ALOIA, JF VASWANI, A FLASTER, E YEH, JK MA, R AF ALOIA, JF VASWANI, A FLASTER, E YEH, JK MA, R TI FAT-FREE MASS IS A MAJOR DETERMINANT OF BONE-DENSITY IN PREMENOPAUSAL BLACK-AND-WHITE WOMEN SO JOURNAL OF BONE AND MINERAL RESEARCH LA English DT Meeting Abstract C1 WINTHROP UNIV HOSP,MINEOLA,NY. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 0 TC 2 Z9 2 U1 0 U2 0 PU BLACKWELL SCIENCE INC PI CAMBRIDGE PA 238 MAIN ST, CAMBRIDGE, MA 02142 SN 0884-0431 J9 J BONE MINER RES JI J. Bone Miner. Res. PD AUG PY 1993 VL 8 SU 1 BP S259 EP S259 PG 1 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA LR205 UT WOS:A1993LR20500569 ER PT J AU ABE, H BELL, AT AF ABE, H BELL, AT TI SYNTHESIS OF BUTYRONITRILE VIA AMMONOLYSIS OF BUTYLALCOHOL AND DEHYDROGENATION OF BUTYLAMINE OVER MO2N SO JOURNAL OF CATALYSIS LA English DT Article C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP ABE, H (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,CTR ADV MAT,BERKELEY,CA 94720, USA. OI Bell, Alexis/0000-0002-5738-4645 NR 11 TC 10 Z9 11 U1 1 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9517 J9 J CATAL JI J. Catal. PD AUG PY 1993 VL 142 IS 2 BP 430 EP 436 DI 10.1006/jcat.1993.1220 PG 7 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA LN761 UT WOS:A1993LN76100009 ER PT J AU CHANG, YF SOMORJAI, GA HEINEMANN, H AF CHANG, YF SOMORJAI, GA HEINEMANN, H TI A TEMPERATURE-PROGRAMMED ISOTOPE-EXCHANGE STUDY OF CA-NI-K AND MG-LI OXIDE CATALYSTS USED FOR OXIDATIVE COUPLING OF METHANE SO JOURNAL OF CATALYSIS LA English DT Article ID OXYGEN; LI/MGO RP CHANG, YF (reprint author), LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720, USA. NR 21 TC 9 Z9 9 U1 2 U2 2 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9517 J9 J CATAL JI J. Catal. PD AUG PY 1993 VL 142 IS 2 BP 697 EP 707 DI 10.1006/jcat.1993.1242 PG 11 WC Chemistry, Physical; Engineering, Chemical SC Chemistry; Engineering GA LN761 UT WOS:A1993LN76100031 ER PT J AU SJAASTAD, MD ZETTL, KS PARRY, G FIRESTONE, GL MACHEN, TE AF SJAASTAD, MD ZETTL, KS PARRY, G FIRESTONE, GL MACHEN, TE TI HORMONAL-REGULATION OF THE POLARIZED FUNCTION AND DISTRIBUTION OF NA/H EXCHANGE AND NA/HCO3 COTRANSPORT IN CULTURED MAMMARY EPITHELIAL-CELLS SO JOURNAL OF CELL BIOLOGY LA English DT Article ID INTRACELLULAR PH REGULATION; NA+-H+ EXCHANGER; RETINAL-PIGMENT EPITHELIUM; BORDER MEMBRANE-PROTEIN; RENAL PROXIMAL TUBULE; MOLECULAR-CLONING; COLLECTING DUCT; KIDNEY-CELLS; EXPRESSION; ANTIPORTER AB The time course for development of polarized function and morphological distribution of pH regulatory mechanisms has been examined in a mouse mammary epithelial cell line (31EG4). Monolayers grown on permeable supports had tight junctions when grown 3-4 days in the presence of the lactogenic hormones dexamethasone (D, a synthetic glucocorticoid) and insulin (I), or in D, I, and prolactin (P), but there were no tight junctions in the absence of D. Microspectrofluorimetry of the pH-sensitive dye BCECF was used to measure pH (pH(i)) in cells mounted in a two-sided perfusion chamber to distinguish pH regulatory activity at the apical and basolateral membranes. Na/H exchange was assayed as the Na-dependent, amiloride-sensitive component of pH(i) recovery from an acid load induced by a pulse of NH3/NH4-Containing solution. When monolayers were grown 3-4 d in the presence of P, D, and I, Na/H exchange was restricted to the basolateral membrane. In contrast, in the absence of P, Na/H exchange was present on both the apical and basolateral membranes. After 5-6 days, in the presence or absence of P, Na/H exchange was present only on the basolateral membrane. An antibody to the NHE-1 isoform of the Na/H exchanger was used to determine its morphological distribution. In all hormone conditions the antibody recognized a protein of approximately 110 kD (Western blot), and confocal immunofluorescence microscopy of this antibody and of an anti-ZO-1 (the marker of the tight junctions) antibody showed that the morphological distribution of the Na/H exchanger was similar to the functional distribution under all hormonal treatments. In addition, a putative Na/HCO3 cotransport system was monitored as a Na-dependent, amiloride-insensitive pH(i) recovery mechanism that was inhibited by 200 muM H2DIDS. After treatment with D+I (but not with I alone) cotransport appeared exclusively on the basolateral membrane, and the polarized expression of this transporter was not altered by P. We conclude that when mammary cells are grown in D+I-containing media, the Na/H exchanger is expressed initially (i.e., after 3-4 d) on both the apical and basolateral membranes and later (5-6 d) on only the basolateral membrane. P (in the presence of D+I) selectively speeds this polarization, which is determined by polarized distribution of the exchanger to the apical and/or basal membrane and not by the activation and/or inactivation of transporters. Since the Na/HCO3 cotransporter (which requires D+I for expression and is unaffected by P) is expressed only in the basolateral membrane, we suggest that polarization of different pH regulatory mechanisms may be independently regulated in mammary epithelial cells. C1 LAWRENCE BERKELEY LAB,DIV BIOL & MED,CELL & MOLEC BIOL GRP,BERKELEY,CA 94720. RP SJAASTAD, MD (reprint author), UNIV CALIF BERKELEY,DEPT MOLEC & CELL BIOL,DIV CELL & DEV BIOL,LIFE SCI ANNEX,BERKELEY,CA 94720, USA. FU NIDDK NIH HHS [DK-19520, DK-38864, DK-42799] NR 48 TC 16 Z9 16 U1 0 U2 1 PU ROCKEFELLER UNIV PRESS PI NEW YORK PA 1114 FIRST AVE, 4TH FL, NEW YORK, NY 10021 SN 0021-9525 J9 J CELL BIOL JI J. Cell Biol. PD AUG PY 1993 VL 122 IS 3 BP 589 EP 600 DI 10.1083/jcb.122.3.589 PG 12 WC Cell Biology SC Cell Biology GA LP642 UT WOS:A1993LP64200008 PM 8393012 ER PT J AU CARRADO, KA AF CARRADO, KA TI PRESENTING THE FUN SIDE OF THE PERIODIC-TABLE SO JOURNAL OF CHEMICAL EDUCATION LA English DT Article RP CARRADO, KA (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 2 TC 2 Z9 3 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0021-9584 J9 J CHEM EDUC JI J. Chem. Educ. PD AUG PY 1993 VL 70 IS 8 BP 658 EP 659 PG 2 WC Chemistry, Multidisciplinary; Education, Scientific Disciplines SC Chemistry; Education & Educational Research GA LT937 UT WOS:A1993LT93700024 ER PT J AU STOCK, G MILLER, WH AF STOCK, G MILLER, WH TI CLASSICAL FORMULATION OF THE SPECTROSCOPY OF NONADIABATIC EXCITED-STATE DYNAMICS SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID PUMP-PROBE SPECTROSCOPY; RESONANCE RAMAN-SCATTERING; SURFACE-HOPPING DYNAMICS; POLYATOMIC-MOLECULES; ELECTRONIC-TRANSITIONS; ABSORPTION-SPECTRA; CONICAL INTERSECTION; IMPULSIVE EXCITATION; SEMICLASSICAL THEORY; MODEL AB A general classical formulation of the spectroscopy of nonadiabatically coupled electronic states is developed within the theoretical framework of the classical electron analog model due to Meyer and Miller. Adopting the Heisenberg representation for the calculation of the electric polarization, several approaches are presented to establish a quantum-classical correspondence. It is shown that a consistent classical formulation is obtained by replacing the quantum-mechanical commutators, which appear in quantum-mechanical perturbation theory, by the corresponding classical Poisson brackets which come from classical perturbation theory. The more usual practice of replacing the Heisenberg dipole operators directly by the corresponding classical dipole functions is shown to be an approximation to classical perturbation theory. For a coupled electronic three-state system explicit expressions are derived for the nonlinear polarization. Furthermore the practical application to femtosecond pump-probe spectroscopy is discussed in some detail. C1 UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA. NR 69 TC 19 Z9 19 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1545 EP 1555 DI 10.1063/1.465323 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200011 ER PT J AU SIGGEL, MRF WEST, JB HAYES, MA PARR, AC DEHMER, JL IGA, I AF SIGGEL, MRF WEST, JB HAYES, MA PARR, AC DEHMER, JL IGA, I TI SHAPE-RESONANCE-ENHANCED CONTINUUM CONTINUUM COUPLING IN PHOTOIONIZATION OF CO2 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID RESOLVED PHOTOELECTRON-SPECTROSCOPY; ANGULAR-DISTRIBUTIONS; CROSS-SECTIONS; CARBON-DIOXIDE; PHOTO-IONIZATION; CHANNEL; N-2; EXCITATION; PARAMETERS; SCATTERING AB We have measured photoionization branching ratios and photoelectron asymmetry parameters for photoionization of CO2 leading to the first four electronic states of CO2+ over the photon energy range from 20 to 50 eV. The motivation for this work was the prediction by Lucchese [J. Chem. Phys. 92, 4203 (1990)] that the sigma(u) shape resonance in the (4sigma(g))-1 C2SIGMA(g)+ ionization channel would influence the photoionization dynamics in the other valence-shell continua through continuum-continuum channel interaction, with the main effect occurring in the (3sigma(u))-1 B2SIGMA(u)+ channel. Indeed, clear evidence for this phenomenon is observed in this channel, the most prominent indication being a broad, shallow minimum in the asymmetry parameter at approximately 40 eV. Comparisons of the present results with theory and other measurements reflect good overall agreement and provide some guidance regarding the effectiveness of alternative approximations used in the theoretical calculations. C1 NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. ARGONNE NATL LAB,ARGONNE,IL 60439. UNIV FED SAO CARLOS,DEPT QUIM,BR-13560 SAO CARLOS,SP,BRAZIL. RP SIGGEL, MRF (reprint author), SERC,DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND. RI Iga, Ione/C-1273-2015 NR 32 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1556 EP 1563 DI 10.1063/1.465324 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200012 ER PT J AU RUBENSSON, JE NEEB, M BIERMANN, M XU, Z EBERHARDT, W AF RUBENSSON, JE NEEB, M BIERMANN, M XU, Z EBERHARDT, W TI ELECTRONIC DECAY OF VIBRATIONALLY SELECTED CORE-EXCITED STATES IN MOLECULAR N(2) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID X-RAY-SPECTRA; SPECTROSCOPY AB We have measured and analyzed the vibrational fine structure of the electronic participator decay of the 1s-1 1pi(g) state in gas-phase N2. The monochromator resolution allowed us to limit the vibrational excitations in the excited state so that unequivocally assignable vibrational fine structure in the decay spectra could be resolved. The excitation-emission process is shown to be well-described within the two-step Franck-Condon model, and the data represents individual decay of vibrationally selected core excited states. C1 BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. RP FORSCHUNGSZENTRUM JULICH, IFF, W-5170 JULICH 1, GERMANY. NR 14 TC 27 Z9 27 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 AUG 1 PY 1993 VL 99 IS 3 BP 1633 EP 1636 DI 10.1063/1.465332 PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200021 ER PT J AU SCHMOLTNER, AM HUANG, SY BRUDZYNSKI, RJ CHU, PM LEE, YT AF SCHMOLTNER, AM HUANG, SY BRUDZYNSKI, RJ CHU, PM LEE, YT TI CROSSED MOLECULAR-BEAM STUDY OF THE REACTION O(P-3)+ALLENE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ATOMIC OXYGEN; VINYL BROMIDE; GROUND-STATES; CYCLOPROPANONE; ETHYLENE; ALLENE; DISSOCIATION; O(3P)+C2H4; KINETICS; OXYALLYL AB The reaction between ground state (P-3) oxygen atoms and allene was studied under single collision conditions using the crossed molecular beams method. Product angular distributions and the translational energy distribution were determined for each channel. Two major reaction channels could be identified unambiguously: the formation of carbon monoxide and ethylene following oxygen atom attack on the central carbon atom, and the formation of allenyloxy (formyl-vinyl) radical and hydrogen atom following oxygen atom attack on the terminal carbon atom. In addition, at least one other reaction channel, which could be identified as the production of vinyl and formyl radicals, occurs. This channel involves the decomposition of acrolein which is formed by the addition of oxygen to the terminal carbon atom, followed by 1,2-hydrogen migration. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RP SCHMOLTNER, AM (reprint author), LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. RI Lee, Yuan-Tseh/F-7914-2012 NR 69 TC 19 Z9 19 U1 0 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1644 EP 1653 DI 10.1063/1.465334 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200023 ER PT J AU SCHENTER, GK MESSINA, M GARRETT, BC AF SCHENTER, GK MESSINA, M GARRETT, BC TI CENTROID-DENSITY QUANTUM RATE THEORY - DYNAMICAL TREATMENT OF CLASSICAL RECROSSING SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TRANSITION-STATE THEORY; PROTON-TRANSFER REACTIONS; PATH INTEGRAL APPROACH; RATE CONSTANTS; MOLECULAR-DYNAMICS; MONTE-CARLO; ISOMERIZATION DYNAMICS; SELF-DIFFUSION; FREE-ENERGIES; MODEL AB A new method is presented for the calculation of quantum mechanical rate constants for activated processes. This method is a hybrid approach involving Feynman path integrals and classical dynamics that is an extension of previous work of Messina, Schenter, and Garrett [J. Chem. Phys. 98, 8525 (1993)]. We make an ansatz for the quantum mechanical analog to the classical flux correlation function expression for the rate constant. This expression involves an imaginary-time, phase-space Feynman path integral, with the dividing surface and characteristic function expressed as a function of the phase-space centroid variables. The reactive flux correlation function is obtained from a classical-like expression in which the characteristic function is evaluated by evolving the phase-space centroid variables as if they were classical dynamical variables, We show that the theory gives exact analytic results in the high temperature and harmonic limits. The theory is further tested on a model anharmonic two-dimensional system of an Eckart barrier coupled to a harmonic oscillator. The results of the theory compare favorably to accurate numerical calculations. RP PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RI Garrett, Bruce/F-8516-2011; Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 66 TC 30 Z9 30 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1674 EP 1684 DI 10.1063/1.465284 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200026 ER PT J AU PETERSON, ES SCHWARTZ, BJ HARRIS, CB AF PETERSON, ES SCHWARTZ, BJ HARRIS, CB TI THE DYNAMICS OF EXCITON TUNNELING AND TRAPPING IN CONDENSED XENON ON ULTRAFAST TIME SCALES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID RARE-GAS SOLIDS; BINARY COLLISION THEORIES; VIBRATIONAL-RELAXATION; CHEMICAL-REACTIVITY; SIMPLE LIQUIDS; STATES; PHASE; CLUSTERS; ARGON; PHOTOIONIZATION AB We report the use of picosecond transient absorption spectroscopy to directly observe the dynamics of formation, tunneling, and subsequent cooling of the n = 1, GAMMA(3/2) exciton in condensed xenon over a density range of 0.10 to 1.8 g/ml. At lower densities, only Xe2* excimers are formed, which undergo vibrational cooling on a tens of picoseconds time scale. At densities high enough to support exciton formation, tunneling from the free to the trapped exciton state takes place in less-than-or-equal-to 3 ps, and cooling of the localized exciton takes place in 5-10 ps; neither rate is strongly dependent on Xe density over the range investigated. The results are compared to theories that describe the formation and cooling rates of the trapped exciton state, and are consistent with a resonant energy transfer mechanism in which the excitation hops between neighboring Xe atoms during the trapping process. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. OI Schwartz, Benjamin/0000-0003-3257-9152 NR 58 TC 12 Z9 12 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 AUG 1 PY 1993 VL 99 IS 3 BP 1693 EP 1702 DI 10.1063/1.465286 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200028 ER PT J AU CARMAN, HS KLOTS, CE COMPTON, RN AF CARMAN, HS KLOTS, CE COMPTON, RN TI RYDBERG ELECTRON-TRANSFER TO HYDROGEN IODIDE - DISSOCIATIVE AND NONDISSOCIATIVE ELECTRON-CAPTURE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID THRESHOLD VIBRATIONAL-EXCITATION; EXCITED FESHBACH RESONANCES; ATTACHMENT CROSS-SECTIONS; DEPENDENT RATE CONSTANTS; NEGATIVE-ION FORMATION; INTERMEDIATE-N; POLAR-MOLECULES; ENERGY-RELEASE; FINE-STRUCTURE; XENON ATOMS AB Rydberg electron transfer (RET) to jet-cooled hydrogen iodide (HI) molecules has been studied for alkali atoms excited to ns and nd Rydberg levels (9 < n < 40). I- ions produced by dissociative electron capture are observed for all Rydberg levels studied, even though dissociative RET becomes endothermic for n < 52. For n > 23, rate constants for I- formation are in good agreement with previous results for low energy free electron attachment. For lower values of n, the RET results deviate from the free electron results due to electrostatic interactions between the nascent positive (Rydberg core) and negative ions. A simple calculation based upon the ''free electron model'' agrees quantitatively with the rate constant data for n > 13. For Rydberg levels with n < 13, long-lived HI- (and DI-) ions are observed which appear to be stable with respect to both dissociation and autodetachment. These observations indicate that a bound and stable anion state exists, correlating with the lowest H (D)+I- limit, with a potential well which supports at least one vibrational level for both HI- and DI-. RP CARMAN, HS (reprint author), OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,CHEM PHYS SECT,POB 2008,OAK RIDGE,TN 37831, USA. NR 95 TC 21 Z9 21 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1734 EP 1743 DI 10.1063/1.465290 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200032 ER PT J AU SINNOTT, SB KELCHNER, CL DEPRISTO, AE AF SINNOTT, SB KELCHNER, CL DEPRISTO, AE TI EXPLORATION OF APPROXIMATIONS OF THE KINETIC-EXCHANGE-CORRELATION ENERGY SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CORRECTED EFFECTIVE-MEDIUM; EMBEDDED-ATOM METHOD; TRANSITION-METALS; BODY FORMULATION; GLUE MODEL; FUNCTIONALS; RELAXATION AB We present the results of our work to estimate the many-body kinetic-exchange-correlation energy with a two-body approximation. The approximation does not use any adjustable parameters or any functional form. Results of this approximation used within the corrected effective medium method in place of exact numerical integration are provided for Ni, Cu, Rh, Pd, and Ag. Systems that are studied include diatomics, surfaces and the bulk lattice. Among the quantities calculated are surface energies, energies of formation for various bimetallic solids, and the barriers and predicted mechanism of the diffusion of Cu on Cu(100). Finally, we discuss the validity of approximating a many-body energy with a two-body function. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP SINNOTT, SB (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. RI Sinnott, Susan/P-8523-2014 OI Sinnott, Susan/0000-0002-3598-0403 NR 23 TC 2 Z9 2 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1816 EP 1823 DI 10.1063/1.465298 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200040 ER PT J AU WOON, DE DUNNING, TH AF WOON, DE DUNNING, TH TI BENCHMARK CALCULATIONS WITH CORRELATED MOLECULAR WAVE-FUNCTIONS .1. MULTIREFERENCE CONFIGURATION-INTERACTION CALCULATIONS FOR THE 2ND-ROW DIATOMIC HYDRIDES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID RADIATIVE TRANSITION-PROBABILITIES; 2ND-ORDER PERTURBATION-THEORY; ELECTRON CORRELATION-ENERGY; GAUSSIAN-BASIS SETS; ABINITIO CALCULATIONS; POTENTIAL CURVES; OPEN-SHELL; STATES; CASSCF; SH AB Multireference configuration interaction calculations (valence electrons only) based on generalized valence bond (GVB) and complete active space (CAS) self-consistent field wave functions are used to compute potential energy functions and spectroscopic constants for the second row diatomic hydrides of aluminum through chlorine. The correlation consistent basis sets of Dunning and co-workers have been used. This suite of sets-standard and augmented sets of double through quintuple zeta quality-provides a systematic means of improving the description of chemical bonding. The regularity of D(e) and r(e) as a function of basis set quality allows extrapolation to an estimated ''complete'' basis set limit. The error in the CAS+1+2 predictions of D(e) for the five species varies from 0.3 kcal/mol (AlH) to 1.4 kcal/mol (HCl) with a root-mean-square (rms) error of 0.7 kcal/mol. The error in r(e) varies from 0.0008 angstrom (SH) to 0.0028 angstrom (SiH) with a rms error of 0.002 angstrom. Other properties are described with comparable accuracy. GVB+1+2 results are only slightly less accurate (rms errors of 1.3 kcal/mol and 0.003 angstrom, respectively). The intrinsic errors inherent in the use of GVB+1+2 and CAS+1+2 wave functions, i.e., the errors at the ''complete'' basis set limit, are found to be much smaller than previously thought. Triple zeta quality sets are found to provide a good compromise between accuracy and cost. RP PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 61 TC 249 Z9 255 U1 3 U2 18 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1914 EP 1929 DI 10.1063/1.465306 PG 16 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200049 ER PT J AU PETERSON, KA KENDALL, RA DUNNING, TH AF PETERSON, KA KENDALL, RA DUNNING, TH TI BENCHMARK CALCULATIONS WITH CORRELATED MOLECULAR WAVE-FUNCTIONS .2. CONFIGURATION-INTERACTION CALCULATIONS ON 1ST-ROW DIATOMIC HYDRIDES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID GAUSSIAN-BASIS SETS; DIPOLE-MOMENT FUNCTION; GENERAL CONTRACTION; DISSOCIATION-ENERGY; ATOMS; ORBITALS AB Potential energy functions have been calculated for the electronic ground states of the first row diatomic hydrides BH, CH, NH, OH, and HF using single- (HF+1+2) and multi-(GVB+1+2 and CAS+1+2) reference internally contracted single and double excitation configuration interaction (CI) wave functions. The convergence of the derived spectroscopic constants and dissociation energies with respect to systematic increases in the size of the one-particle basis set has been investigated for each method using the correlation consistent basis sets of Dunning and co-workers. The effect of augmenting the basis sets with extra diffuse functions has also been addressed. Using sets of double (cc-pVDZ) through quintuple (cc-pV5Z) zeta quality, the complete basis set (CBS) limits for E(e), D(e), r(e), and omega(e) have been estimated for each theoretical method by taking advantage of the regular convergence behavior. The estimated CBS limits are compared to the available experimental results, and the intrinsic errors associated with each theoretical method are discussed. The potential energy functions obtained from GVB+1+2 and CAS+1+2 calculations are observed to yield very comparable spectroscopic constants, with errors in D(e) ranging from 0.4 kcal/mol for BH to 2.9 kcal/mol for HF. The contraction errors associated with the internally contracted multireference CI have also been calculated for each species; while found to increase from BH to HF, they are, in general, small for all calculated spectroscopic constants. For the cc-pVDZ basis sets, spectroscopic constants have also been determined from full CI calculations. RP PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 42 TC 260 Z9 272 U1 0 U2 12 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD AUG 1 PY 1993 VL 99 IS 3 BP 1930 EP 1944 DI 10.1063/1.465307 PG 15 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200050 ER PT J AU WU, DT AF WU, DT TI GENERAL-APPROACH TO BARRIER CROSSING IN MULTICOMPONENT NUCLEATION SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CONDENSATION; KINETICS AB Multicomponent nucleation analysis is reformulated to include all paths of nucleation. Starting with simple measurement theory, one is led to define a global nucleation rate that corresponds to what is observable experimentally. This rate can be calculated at steady state and estimated for arbitrary times, provided the rate matrix and the free energy obey certain constraints. When applied to the special case of a quadratic barrier, the global nucleation rate is smaller than the standard result based on the rate of saddle-point nucleation. Cases with more general barriers can also be treated by the same method. C1 HARVARD UNIV,CAMBRIDGE,MA 02138. RP WU, DT (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA. NR 17 TC 24 Z9 24 U1 2 U2 6 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 AUG 1 PY 1993 VL 99 IS 3 BP 1990 EP 2000 DI 10.1063/1.465260 PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200056 ER PT J AU LAGANA, A PACK, RT PARKER, GA AF LAGANA, A PACK, RT PARKER, GA TI LI+FH REACTIVE CROSS-SECTIONS FROM J=0 ACCURATE QUANTUM REACTIVITY SO JOURNAL OF CHEMICAL PHYSICS LA English DT Note ID POTENTIAL-ENERGY SURFACE; SCATTERING AB Accurate three dimensional quantum calculations have been carried out for the Li+HF reaction at zero total angular momentum J on a potential energy surface fitted to ab initio points. By adopting a J shifting approximation reactive cross sections are estimated and compared with the experiment. The agreement is very good. C1 LOS ALAMOS NATL LAB,DIV THEORET T12,LOS ALAMOS,NM 87545. UNIV OKLAHOMA,DEPT PHYS & ASTRON,NORMAN,OK 73019. RP LAGANA, A (reprint author), UNIV PERUGIA,DIPARTIMENTO CHIM,I-06100 PERUGIA,ITALY. RI Parker, Gregory/A-4327-2009; Lagana, Antonio/E-8215-2014 OI Parker, Gregory/0000-0002-0225-8887; Lagana, Antonio/0000-0002-3886-7342 NR 25 TC 26 Z9 26 U1 1 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 AUG 1 PY 1993 VL 99 IS 3 BP 2269 EP 2270 PG 2 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LN782 UT WOS:A1993LN78200088 ER PT J AU SOKALSKI, WA KELLER, DA ORNSTEIN, RL REIN, R AF SOKALSKI, WA KELLER, DA ORNSTEIN, RL REIN, R TI MULTIPOLE CORRECTION OF ATOMIC MONOPOLE MODELS OF MOLECULAR CHARGE-DISTRIBUTION .1. PEPTIDES SO JOURNAL OF COMPUTATIONAL CHEMISTRY LA English DT Article ID HYDROGEN-BOND; ELECTRON CORRELATION; ECEPP POTENTIALS; AMINO-ACIDS; REPRESENTATION; DIRECTIONALITY; PROTEINS; MOMENTS; AMBER AB The defects in atomic monopole models of molecular charge distribution have been analyzed for several model-blocked peptides and compared with accurate quantum chemical values. The results indicate that the angular characteristics of the molecular electrostatic potential around functional groups capable of forming hydrogen bonds can be considerably distorted within various models relying upon isotropic atomic charges only. It is shown that these defects can be corrected by augmenting the atomic point charge models by cumulative atomic multipole moments (CAMMs). Alternatively, sets of off-center atomic point charges could be automatically derived from respective multipoles, providing approximately equivalent corrections. For the first time, correlated atomic multipoles have been calculated for N-acetyl, N'-methylamide-blocked derivatives of glycine, alanine, cysteine, threonine, leucine, lysine, and serine using the MP2 method. The role of the correlation effects in the peptide molecular charge distribution are discussed. (C) 1993 by John Wiley & Sons, Inc. C1 INST PHYS & THEORET CHEM, PL-50370 WROCLAW, POLAND. PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RP SOKALSKI, WA (reprint author), ROSWELL PK CANC INST, DEPT BIOPHYS, BUFFALO, NY 14263 USA. RI Sokalski, Waclaw/I-6151-2012 FU BHP HRSA HHS [DMB920043P]; NIDCR NIH HHS [DE-AMPb-76-RLO-2225] NR 42 TC 21 Z9 21 U1 0 U2 4 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0192-8651 J9 J COMPUT CHEM JI J. Comput. Chem. PD AUG PY 1993 VL 14 IS 8 BP 970 EP 976 DI 10.1002/jcc.540140812 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA LM546 UT WOS:A1993LM54600011 PM 11539835 ER PT J AU COHEN, BI WILLIAMS, TJ AF COHEN, BI WILLIAMS, TJ TI IMPLEMENTATION OF A SEMIIMPLICIT ORBIT-AVERAGED GYROKINETIC PARTICLE CODE SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID SIMULATION; PLASMA RP COHEN, BI (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 12 TC 5 Z9 5 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 0021-9991 J9 J COMPUT PHYS JI J. Comput. Phys. PD AUG PY 1993 VL 107 IS 2 BP 282 EP 290 DI 10.1006/jcph.1993.1143 PG 9 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LN472 UT WOS:A1993LN47200007 ER PT J AU DIMITS, AM LEE, WW AF DIMITS, AM LEE, WW TI PARTIALLY LINEARIZED ALGORITHMS IN GYROKINETIC PARTICLE SIMULATION SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID TEMPERATURE-GRADIENT; DRIFT INSTABILITIES; EQUATIONS; TRANSPORT; PLASMA; MODES RP DIMITS, AM (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 35 TC 94 Z9 94 U1 0 U2 12 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 AUG PY 1993 VL 107 IS 2 BP 309 EP 323 DI 10.1006/jcph.1993.1146 PG 15 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LN472 UT WOS:A1993LN47200010 ER PT J AU TRAPP, JA MORTENSEN, GA AF TRAPP, JA MORTENSEN, GA TI A DISCRETE PARTICLE MODEL FOR BUBBLE-SLUG 2-PHASE FLOWS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RP TRAPP, JA (reprint author), UNIV COLORADO,DENVER,CO 80202, USA. NR 17 TC 19 Z9 19 U1 0 U2 1 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 AUG PY 1993 VL 107 IS 2 BP 367 EP 377 DI 10.1006/jcph.1993.1151 PG 11 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LN472 UT WOS:A1993LN47200015 ER PT J AU PARKER, SE FRIEDMAN, A RAY, SL BIRDSALL, CK AF PARKER, SE FRIEDMAN, A RAY, SL BIRDSALL, CK TI BOUNDED MULTISCALE PLASMA SIMULATION - APPLICATION TO SHEATH PROBLEMS SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID PARTICLE SIMULATION; COLLISIONLESS C1 UNIV CALIF BERKELEY,ELECTR RES LAB,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 20 TC 18 Z9 19 U1 1 U2 3 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 AUG PY 1993 VL 107 IS 2 BP 388 EP 402 DI 10.1006/jcph.1993.1153 PG 15 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LN472 UT WOS:A1993LN47200017 ER PT J AU BAMBERGER, CE KOPP, OC AF BAMBERGER, CE KOPP, OC TI ACICULAR CRYSTALS OF SODIUM TUNGSTEN BRONZES SO JOURNAL OF CRYSTAL GROWTH LA English DT Article AB The synthesis of sodium tungsten bronzes, NaxWO3, with emphasis on crystals with acicular morphology, has been examined experimentally. The acicular morphology is obtained for a range of compositions in which 0.15 less-than-or-equal-to x less-than-or-equal-to 0.28, and generally more than one crystal structure is present. At x almost-equal-to 0.28 the tetragonal II phase predominates. whereas at x almost-equal-to 0.15 an unknown structure is the major phase. Surprisingly, all the bronzes tested exhibited large solubilities in hot aqueous solutions of NH4OH. C1 UNIV TENNESSEE,DEPT GEOL SCI,KNOXVILLE,TN 37996. RP BAMBERGER, CE (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. NR 24 TC 5 Z9 5 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD AUG PY 1993 VL 131 IS 3-4 BP 473 EP 480 DI 10.1016/0022-0248(93)90199-7 PG 8 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA LU487 UT WOS:A1993LU48700023 ER PT J AU TANG, HT HOSSAIN, QA RAVINDRA, MK AF TANG, HT HOSSAIN, QA RAVINDRA, MK TI CONTAINMENT CAPACITY AND FAILURE MODES FOR CONDITIONS BEYOND DESIGN BASIS SO JOURNAL OF ENERGY ENGINEERING-ASCE LA English DT Article AB Under internal over-pressure loading, experimental studies have demonstrated that the most probable ultimate failure mode of concrete containments of nuclear power plants is leakage instead of a catastrophic break. For steel containments scaled model tests have shown instantaneous catastrophic failure. However, due-to simplistic representations of scaled models, the data base is not conclusive for interpreting full-scale steel containment behavior. Rather it serves primarily as a technical basis for method validation. Structurally, analytical and experimental data have shown that both concrete and steel containments can withstand two to three times internal design basis pressures without failure. Experimental data on external seismic loading plus internal overpressure loading is limited. Most of the findings are based on analytical studies. Because of geometric complexity (3-D features, local stiffness discontinuities, etc.) and nonlinear behavior (geometric nonlinearity and material nonlinearity) under extreme loadings, containment capacity and failure-mode prediction requires qualified and validated analytical tools, together with sound engineering judgment. C1 EQE INT INC,IRVINE,CA 92715. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP TANG, HT (reprint author), ELECT POWER RES INST,PALO ALTO,CA 94303, USA. NR 44 TC 0 Z9 0 U1 3 U2 5 PU ASCE-AMER SOC CIVIL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9402 J9 J ENERG ENG-ASCE JI J. Energy Eng.-ASCE PD AUG PY 1993 VL 119 IS 2 BP 101 EP 118 DI 10.1061/(ASCE)0733-9402(1993)119:2(101) PG 18 WC Energy & Fuels; Engineering, Civil SC Energy & Fuels; Engineering GA LM901 UT WOS:A1993LM90100003 ER PT J AU FARRAR, CR REED, JW SALMON, MW AF FARRAR, CR REED, JW SALMON, MW TI FAILURE MODES OF LOW-RISE SHEAR WALLS SO JOURNAL OF ENERGY ENGINEERING-ASCE LA English DT Article ID STRENGTH AB A summary of available data concerning the structural response of low-rise shear walls is presented. These data will be used to address two failure modes associated with shear wall structures. First, the data concerning the seismic capacity of the shear walls are examined, with emphasis on excessive deformations that can cause equipment failure. Second. the data concerning the dynamic properties of shear walls (stiffness and damping) that are necessary for computing the seismic inputs to attached equipment are summarized. This case addresses the failure of equipment when the structure remains functional. C1 JACK R BENJAMIN & ASSOCIATES INC,MT VIEW,CA 94041. EQE ENGN CONSULTANTS,IRVINE,CA 92715. RP FARRAR, CR (reprint author), LOS ALAMOS NATL LAB,MS J576,LOS ALAMOS,NM 87545, USA. NR 74 TC 2 Z9 2 U1 0 U2 0 PU ASCE-AMER SOC CIVIL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9402 J9 J ENERG ENG-ASCE JI J. Energy Eng.-ASCE PD AUG PY 1993 VL 119 IS 2 BP 119 EP 138 DI 10.1061/(ASCE)0733-9402(1993)119:2(119) PG 20 WC Energy & Fuels; Engineering, Civil SC Energy & Fuels; Engineering GA LM901 UT WOS:A1993LM90100004 ER PT J AU MARGOLIS, SB AF MARGOLIS, SB TI NONLINEAR STABILITY OF COMBUSTION-DRIVEN ACOUSTIC-OSCILLATIONS IN RESONANCE TUBES SO JOURNAL OF FLUID MECHANICS LA English DT Article ID PULSE COMBUSTOR; FLAME PROPAGATION; HYDRODYNAMIC STABILITY; DROPLET VAPORIZATION; PISTON ACCELERATION; TAIL-PIPE; INERT-GAS; BIFURCATION; WAVES; MODES AB The leading-order fluid motions and frequencies in resonance tubes coupled to a combustion-driven flow source, such as occurs in various types of pulse combustors, are usually strongly related to those predicted by linear acoustics. However, in order to determine the amplitudes of the infinite number of classical acoustic modes predicted by linear theory alone, and hence the complete solution, a nonlinear analysis is required. In the present work, we adopt a formal perturbation approach based on the smallness of the mean-flow Mach number which, as a consequence of solvability conditions at higher orders in the analysis, results in an infinitely coupled system of nonlinear evolution equations for the amplitudes of the linear acoustic modes. An analysis of these amplitude equations then shows that the combination of driving processes, such as combustion, that supply energy to the acoustic oscillations and those, such as viscous effects, that dampen such motions, in conjunction with the manner in which the resonance tube is coupled to its flow source, provides an effective mode-selection mechanism that inhibits the (linear) growth of all but a few of the lower-frequency modes. For the common case of long resonance tubes, the lowest frequencies correspond to purely longitudinal modes, and we analyse in detail the solution behaviour for a typical situation in which only the first of these has a positive linear growth rate. Basic truncation strategies for the infinitely coupled amplitudes are discussed, and we demonstrate, based on analyses with both two and three modes, the stable bifurcation of an acoustic oscillation, or limit cycle, at a critical value of an appropriate bifurcation parameter. In addition, we show that the bifurcated solution branch has a turning point at a second critical value of the bifurcation parameter beyond which no stable bounded solutions exist. RP MARGOLIS, SB (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA. NR 42 TC 15 Z9 15 U1 0 U2 4 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0022-1120 J9 J FLUID MECH JI J. Fluid Mech. PD AUG PY 1993 VL 253 BP 67 EP 103 DI 10.1017/S0022112093001727 PG 37 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA LV212 UT WOS:A1993LV21200004 ER PT J AU ENAS, JD GARCIA, JG MATHIS, CA GERDES, JM AF ENAS, JD GARCIA, JG MATHIS, CA GERDES, JM TI NUCLEOPHILIC AROMATIC-SUBSTITUTION REACTIONS WITH THE FLUORIDE-ION - FORMATION OF 5-FLUORO-INDANONES AND INDANDIONES RELATED TO ATIPAMEZOLE SO JOURNAL OF FLUORINE CHEMISTRY LA English DT Article AB The 5-nitro and 5-(trimethylammonium trifluoromethanesulfonyl)indanones 2a,b and the related 1,3-indandiones 3a,b have been synthesized, and the efficiency of the nucleophilic aromatic substitution reaction with fluoride ion on these substrates evaluated. The indandiones underwent aromatic substitution to afford fluoroaromatic adducts whereas the indanone substrates provided little or no fluoro-substitution product. The fluoro-indandione was subsequently reduced to the corresponding fluoroindane hydrocarbon. The synthetic sequence of nucleophilic fluorination followed by carbonyl reduction provides a rationale for the potential preparation of the radiofluorinated alpha2-adrenoreceptor ligand 5-fluoroatipamezole. RP ENAS, JD (reprint author), LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BERKELEY,CA 94720, USA. RI Mathis, Chester/A-8607-2009 NR 17 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0022-1139 J9 J FLUORINE CHEM JI J. Fluor. Chem. PD AUG PY 1993 VL 63 IS 3 BP 233 EP 241 DI 10.1016/S0022-1139(00)80567-9 PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic SC Chemistry GA LP188 UT WOS:A1993LP18800006 ER PT J AU PHILLIPS, JL BAME, SJ ELPHIC, RC GOSLING, JT THOMSEN, MF ONSAGER, TG AF PHILLIPS, JL BAME, SJ ELPHIC, RC GOSLING, JT THOMSEN, MF ONSAGER, TG TI WELL-RESOLVED OBSERVATIONS BY ISEE 2 OF ION DISPERSION IN THE MAGNETOSPHERIC CUSP SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID FRONTSIDE BOUNDARY-LAYER; DAYSIDE MAGNETOPAUSE; POLAR MAGNETOSPHERE; PLASMA INJECTION; DISTRIBUTIONS; RECONNECTION; CONVECTION; FIELD AB During a prolonged period of southward interplanetary magnetic field on October 30, 1978, the ISEE 2 spacecraft observed an unusually prolonged and distinct region of ion energy-time dispersion in the dayside, dawn magnetosphere. Observed plasma features included the (1) presence of magnetosheath electrons and initial absence of magnetosheath ions and (2) subsequent arrival and energy-time dispersion of magnetosheath ions as the spacecraft transited outbound from 6.03 to 7.66 Earth radii. We use ISEE 2 ion measurements to illustrate these dispersive time-of-flight effects and to support our interpretation of a location in the North magnetospheric cusp. Ion energy dispersion, well documented at lower altitudes but generally only observable for a few minutes due to rapid cusp crossings by the spacecraft, in this case persists for approximately 35 min and includes well-resolved sequences of magnetosheath and magnetospheric ion distributions. We focus primarily on observations and time-of-flight analysis of ions from the magnetosheath, which are observed simultaneously entering and exiting the cusp at different energies. We discuss the observational support and shortcomings of various ion injection locations and durations and conclude that quasi-steady merging at the dayside magnetopause, with ion dispersion caused by spacecraft motion away from the last closed field line, is the most likely scenario. C1 UNIV NEW HAMPSHIRE,INST STUDY EARTH OCEANS & SPACE,DURHAM,NH 03824. RP PHILLIPS, JL (reprint author), LOS ALAMOS NATL LAB,MAIL STOP D466,LOS ALAMOS,NM 87545, USA. NR 24 TC 23 Z9 23 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD AUG 1 PY 1993 VL 98 IS A8 BP 13429 EP 13440 DI 10.1029/93JA00631 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LR054 UT WOS:A1993LR05400023 ER PT J AU MCCOMAS, DJ BAME, SJ BARRACLOUGH, BL DONART, JR ELPHIC, RC GOSLING, JT MOLDWIN, MB MOORE, KR THOMSEN, MF AF MCCOMAS, DJ BAME, SJ BARRACLOUGH, BL DONART, JR ELPHIC, RC GOSLING, JT MOLDWIN, MB MOORE, KR THOMSEN, MF TI MAGNETOSPHERIC PLASMA ANALYZER - INITIAL 3-SPACECRAFT OBSERVATIONS FROM GEOSYNCHRONOUS ORBIT SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID ENERGETIC PARTICLES; DYNAMIC BEHAVIOR; MAGNETOPAUSE; SHAPE AB The first three magnetospheric plasma analyzer (MPA) instruments have been returning data from geosynchronous orbit nearly continuously since late 1989, 1990, and 1991. These identical instruments provide for the first time simultaneous plasma observations from three widely spaced geosynchronous locations. The MPA instruments measure the three-dimensional velocity space distributions of both electrons and ions with energies between approximately 1 eV/q and approximately 40 keV/q. MPA capabilities and observations are summarized in this paper. We use the simultaneous observations from three longitudinally separated spacecraft to synthesize a synoptic view of the morphology of the magnetosphere at geosynchronous orbit over a 6-week interval in early 1992. The MPA observations indicate that the spacecraft encountered seven regions with characteristic plasma populations during this period: (1) the cool, dense plasmasphere (13.1% of the data); (2) a warmer, less dense plasma trough (22.5%); (3) the hot plasma sheet (40.3%); (4) a combination of plasma trough and plasma sheet (18.6%); (5) an empty trough region, devoid of plasma sheet, plasmasphere, or plasma trough populations (4.3%); (6) the magnetosheath and/or low-latitude boundary layer (0.7%); and (7) the lobe (0.3%). The local time distributions of these regions are examined. For example, as suggested by previous authors, we find that at geomagnetically quiet times (Kp < 2) geosynchronous orbit can lie entirely within the plasmasphere while at more active times only the afternoon to evening portions of the orbit are typically within the plasmasphere. We also find that the plasma convection inside the plasmasphere is generally sunward in the corotating (geosynchronous spacecraft) reference frame, independent of activity level, in contrast to previous studies. In addition to such statistical results, the simultaneous data sets at different local times allow us to at least partially separate spatial from temporal variations. In particular, we use these observations to examine the instantaneous shapes of the plasmapause and magnetopause as they pass over geosynchronous orbit. As expected, the plasmapause is found to have a highly variable shape, at various times showing (1) a stable dusk side bulge, (2) a variable bulge which expands, contracts, and moves, (3) an overall expansion and contraction of the plasmasphere, and (4) even more complicated behavior which is best accounted for by large-scale structure of the plasmapause and/or disconnected plasma blobs. During the 6 weeks of data examined, the magnetosheath was encountered on several occasions at synchronous orbit, preferentially on the prenoon side of the magnetosphere. For the first time, simultaneous prenoon and postnoon observations confirm this asymmetry and demonstrate that the magnetopause shape can be highly asymmetric about the Earth-Sun line. RP MCCOMAS, DJ (reprint author), LOS ALAMOS NATL LAB,DIV SPACE SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. RI Moldwin, Mark/F-8785-2011 OI Moldwin, Mark/0000-0003-0954-1770 NR 26 TC 148 Z9 149 U1 0 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0148-0227 J9 J GEOPHYS RES JI J. Geophys. Res-Space Phys. PD AUG 1 PY 1993 VL 98 IS A8 BP 13453 EP 13465 DI 10.1029/93JA00726 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LR054 UT WOS:A1993LR05400025 ER PT J AU ZANGRANDO, F BHARATHAN, D AF ZANGRANDO, F BHARATHAN, D TI DIRECT-CONTACT CONDENSATION OF LOW-DENSITY STEAM ON SEAWATER AT HIGH INLET NONCONDENSABLE CONCENTRATIONS SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article DE CONDENSATION; DIRECT-CONTACT HEAT TRANSFER; HEAT EXCHANGERS ID PACKINGS AB Computer models and experimental data are summarized to characterize the condensation of low-density steam in direct contact with a process fluid that is distributed over structured packings of various geometries. The one-dimensional models integrate the heat, mass, and momentum processes in the two streams, over the height of the contactor. Both cocurrent and countercurrent flows of the two streams were analyzed. The models were validated extensively with experimental data obtained with fresh water and with seawater, at high inlet noncondensable concentrations. The data obtained in these experiments provide a broad engineering data base to design and evaluate the performance of advanced heat exchangers for a number of applications, such as production of electrical power and/or potable water using low-density steam, as could be used in Ocean Thermal Energy Conversion systems and in the low-pressure stages of conventional power cycles. RP ZANGRANDO, F (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 14 TC 2 Z9 2 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD AUG PY 1993 VL 115 IS 3 BP 690 EP 698 DI 10.1115/1.2910740 PG 9 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA LU478 UT WOS:A1993LU47800022 ER PT J AU HURT, RH FLETCHER, TH SAMPAIO, RS AF HURT, RH FLETCHER, TH SAMPAIO, RS TI HEAT-TRANSFER FROM A MOLTEN PHASE TO AN IMMERSED COAL PARTICLE DURING DEVOLATILIZATION SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Article DE FURNACES AND COMBUSTORS; HIGH-TEMPERATURE PHENOMENA; LIQUID METALS ID TEMPERATURE; MODEL; REACTOR; BED AB In seuerul developmental and commercial processes, coal purticles come into direct contuct with a high-temperature molten phase. These processes include molten carbonate coal gasification and bath smelting for the production of iron. Recently, real-time X-ray fluoroscopic images have been published that show volatile matter evolving rapidly from coal particles immersed in molten phases, displacing the surrounding melt andproducing a periodic cycle offormation, rise, and detachment of gas cavities. Thepresent work makes use of these obseruations to develop a model of heat transferfrom the melt to particles undergoing gas evolution. The model is developed for the general case and applied to predict melt-particle heat transfer coefficients under conditions releuant to bath smelting processes. The model shows that the presence of the gas film can actually increase the overall heat transfer rate under certain conditions. C1 CARNEGIE MELLON UNIV,DEPT MET & MAT SCI,PITTSBURGH,PA 15213. RP HURT, RH (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550, USA. NR 32 TC 5 Z9 5 U1 0 U2 2 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD AUG PY 1993 VL 115 IS 3 BP 717 EP 723 DI 10.1115/1.2910743 PG 7 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA LU478 UT WOS:A1993LU47800025 ER PT J AU UNAL, C SADASIVAN, P NELSON, RA AF UNAL, C SADASIVAN, P NELSON, RA TI ON THE HOT-SPOT-CONTROLLED CRITICAL HEAT-FLUX MECHANISM IN SATURATED POOL BOILING .2. THE INFLUENCE OF CONTACT-ANGLE AND NUCLEATION SITE DENSITY SO JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME LA English DT Note DE BOILING; MULTIPHASE FLOWS; PHASE-CHANGE PHENOMENA RP UNAL, C (reprint author), LOS ALAMOS NATL LAB,DIV NUCL TECHNOL & ENGN,ENGN & SAFETY ANAL GRP,LOS ALAMOS,NM 87545, USA. NR 7 TC 2 Z9 2 U1 0 U2 2 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-1481 J9 J HEAT TRANS-T ASME JI J. Heat Transf.-Trans. ASME PD AUG PY 1993 VL 115 IS 3 BP 813 EP 816 DI 10.1115/1.2910763 PG 4 WC Thermodynamics; Engineering, Mechanical SC Thermodynamics; Engineering GA LU478 UT WOS:A1993LU47800045 ER PT J AU MOORE, GJ SANDERS, JA SILLERUD, LO AF MOORE, GJ SANDERS, JA SILLERUD, LO TI ZERO-QUANTUM DIFFERENCE SPECTROSCOPY FOR STRONGLY COUPLED SYSTEMS SO JOURNAL OF MAGNETIC RESONANCE SERIES A LA English DT Note ID HUMAN-PROSTATE C1 UNIV NEW MEXICO,SCH MED,VET ADM MED CTR,DEPT RADIOL,ALBUQUERQUE,NM 87108. RP MOORE, GJ (reprint author), LOS ALAMOS NATL LAB,BIOMED NUCL MAGNET RESONANCE FACIL,LOS ALAMOS,NM 87544, USA. RI Moore, Gregory/E-7184-2010 OI Moore, Gregory/0000-0001-8541-3194 NR 11 TC 3 Z9 3 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 1064-1858 J9 J MAGN RESON SER A JI J. Magn. Reson. Ser. A PD AUG PY 1993 VL 104 IS 1 BP 111 EP 114 DI 10.1006/jmra.1993.1197 PG 4 WC Physics, Atomic, Molecular & Chemical SC Physics GA LQ745 UT WOS:A1993LQ74500016 ER PT J AU LEBERG, PL SMITH, MH AF LEBERG, PL SMITH, MH TI INFLUENCE OF DENSITY ON GROWTH OF WHITE-TAILED DEER SO JOURNAL OF MAMMALOGY LA English DT Article DE ODOCOILEUS-VIRGINIANUS; WHITE-TAILED DEER; GROWTH CURVES; RICHARDS FUNCTION; POPULATION SIZE; SEXUAL DIMORPHISM ID BODY SIZE; RED DEER; POPULATION; MAMMALS; PERFORMANCE; MORTALITY AB Age and mass data from 9,956 white-tailed deer (Odocoileus virginianus) from South Carolina were used to examine the relationship between growth patterns of each sex and population density. Growth parameters for 16 annual cohorts born between 1965 and 1981 were derived with a Richards function; population sizes were estimated with a competing risks model. There were significant relationships of growth parameters for males, but not for females, with population density. Males grew more slowly and reached smaller adult masses at the highest population densities. The growth-density association was weakest in young deer and strongest in males 1.5-2.5 years of age. Sex-specific differences in the growth-density relationship may be due to energetic costs associated with competition among males for mates or to a higher use of marginal habitats by males than by females. One consequence of sex-specific relationships of density with growth rates and adult size is a decrease in sexual dimorphism in size at greater population densities. C1 SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. UNIV GEORGIA,SCH FOREST RESOURCES,ATHENS,GA 30602. UNIV GEORGIA,DEPT ZOOL,INST ECOL,ATHENS,GA 30602. UNIV GEORGIA,DEPT GENET,ATHENS,GA 30602. RP LEBERG, PL (reprint author), UNIV SW LOUISIANA,DEPT BIOL,LAFAYETTE,LA 70504, USA. NR 42 TC 49 Z9 49 U1 0 U2 17 PU AMER SOC MAMMALOGISTS PI PROVO PA BRIGHAM YOUNG UNIV, DEPT OF ZOOLOGY, PROVO, UT 84602 SN 0022-2372 J9 J MAMMAL JI J. Mammal. PD AUG PY 1993 VL 74 IS 3 BP 723 EP 731 DI 10.2307/1382294 PG 9 WC Zoology SC Zoology GA LU824 UT WOS:A1993LU82400024 ER PT J AU SIKKA, VK VISWANATHAN, S LORIA, EA AF SIKKA, VK VISWANATHAN, S LORIA, EA TI PROCESSING AND PROPERTIES OF NB-TI-BASE ALLOYS SO JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE LA English DT Article; Proceedings Paper CT 7TH INTERNATIONAL SYMP ON SUPERALLOYS CY SEP 20-24, 1992 CL CHAMPION, PA DE MECHANICAL PROPERTIES; NB-TI ALLOY PROCESSING; NIOBIUM ALLOYS; NIOBIUM-TITANIUM ALLOYS; OXIDATION AB The processing characteristics, tensile properties, and oxidation response of two Nb-Ti-Al-Cr alloys were investigated. One creep test at 650-degrees-C and 172 MPa was conducted on the base alloy, which contained 40Nb-40Ti-10Al-10Cr. A second alloy was modified with 0.11 at.% C and 0.07 at.% Y. Alloys were arc melted in a chamber backfilled with argon, drop cast into a water-cooled copper mold, and cold rolled to obtain a 0.8-mm sheet. The sheet was annealed at 1100-degrees-C for 0.5 h. Longitudinal tensile specimens and oxidation specimens were obtained for both the base alloy and the modified alloy. Tensile properties were obtained for the base alloy at room temperature, 400, 600, 700, 800, 900, and 1000-degrees-C and for the modified alloy at room temperature, 400, 600, 700, and 800-degrees-C. Oxidation tests on the base alloy and modified alloy, as measured by weight change, were carried out at 600, 700, 800, and 900-degrees-C. Both the base alloy and the modified alloy were extremely ductile and were cold rolled to the final sheet thickness of 0.8 mm without an intermediate anneal. The modified alloy exhibited some edge cracking during cold rolling. Both alloys recrystallized at the end of a 0.5-h annealing treatment. The alloys exhibited moderate strength and oxidation resistance below 600-degrees-C, similar to the results of alloys reported in the literature. The addition of carbon produced almost no change in either the yield strength or ductility as measured by total elongation. A small increase in the ultimate tensile strength and a corresponding decrease in the reduction of area below 600-degrees-C were observed. Carbon addition also served to marginally refine the grain size after annealing. The results of this study and those of similar alloys reported in the literature suggest that 40Nb-40Ti-10Al-10Cr forms a good base alloy suitable for alloying for improvement in its oxidation and high-temperature strength properties. C1 NIOBIUM PROD CO INC,CORAOPOLIS,PA 15108. RP SIKKA, VK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 4 TC 2 Z9 3 U1 0 U2 1 PU ASM INTERNATIONAL PI MATERIALS PARK PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002 SN 1059-9495 J9 J MATER ENG PERFORM JI J. Mater. Eng. Perform. PD AUG PY 1993 VL 2 IS 4 BP 505 EP 510 DI 10.1007/BF02661733 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA LV413 UT WOS:A1993LV41300006 ER PT J AU FUNG, AWP WANG, ZH LU, K DRESSELHAUS, MS PEKALA, RW AF FUNG, AWP WANG, ZH LU, K DRESSELHAUS, MS PEKALA, RW TI CHARACTERIZATION OF CARBON AEROGELS BY TRANSPORT MEASUREMENTS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID ORGANIC AEROGELS; CONDUCTIVITY AB Carbon aerogels are a special class of low-density microcellular foams. These materials are composed of interconnected carbon particles with diameters of approximately 10 nm. The temperature dependence of the dc electrical resistivity and magnetic susceptibility (chi) from 4 K to room temperature, magnetoresistance (MR) in a magnetic field up to 15 T, and Raman scattering were measured as a function of aerogel density. While Raman scattering measurements are not sensitive to variations in density, the chi data show that there are more free carriers in samples of higher density. Aerogel samples with different densities all show a negative temperature coefficient of resistivity and a positive MR. The less dense samples exhibit a stronger temperature dependence of resistivity and a stronger field dependence of the MR, indicating that with decreasing density and increasing porosity, charge carriers are more localized. Data analysis precludes variable-range hopping in favor of nearest-neighbor hopping and fluctuation-induced tunneling as the most likely conduction mechanisms for carbon aerogels. C1 MIT,DEPT PHYS,CAMBRIDGE,MA 02139. LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,LIVERMORE,CA 94550. RP FUNG, AWP (reprint author), MIT,DEPT ELECT ENGN & COMP SCI,CAMBRIDGE,MA 02139, USA. NR 38 TC 53 Z9 53 U1 2 U2 17 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD AUG PY 1993 VL 8 IS 8 BP 1875 EP 1885 DI 10.1557/JMR.1993.1875 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA LR039 UT WOS:A1993LR03900017 ER PT J AU FOSTER, CM BAI, GR PARKER, JC ALI, MN AF FOSTER, CM BAI, GR PARKER, JC ALI, MN TI X-RAY AND MICRO-RAMAN ANALYSIS OF NANOPHASE ZRO2 AND Y2O3-ZRO2 PRODUCED BY THE GAS-PHASE CONDENSATION TECHNIQUE SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID NANOSTRUCTURED Y2O3; NANOCRYSTALLINE AB Nanophase (n-) ZrO2 was produced in its pure and partially stabilized form by the gas-phase condensation method. The material was examined by x-ray diffraction and Raman scattering to obtain information on the structural evolution of the material during sintering. Two types Of Y2O3-doped ZrO2 nanophase material were made: one by co-deposition of n-Y2O3 and n-ZrO2 in a consecutive manner and the second by mechanically mixing n-Y2O3 and n-ZrO2. We have determined that the co-deposition process is the most effective means of doping the n-ZrO2. C1 NANOPHASE TECHNOL CORP,DARIEN,IL 60559. RP FOSTER, CM (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 14 TC 17 Z9 19 U1 0 U2 3 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD AUG PY 1993 VL 8 IS 8 BP 1977 EP 1982 DI 10.1557/JMR.1993.1977 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA LR039 UT WOS:A1993LR03900028 ER PT J AU FARGES, F EWING, RC BROWN, GE AF FARGES, F EWING, RC BROWN, GE TI THE STRUCTURE OF APERIODIC, METAMICT (CA,TH)ZRTI2O7 (ZIRCONOLITE) - AN EXAFS STUDY OF THE ZR-SITES, TH-SITES AND U-SITES SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID ABSORPTION FINE-STRUCTURE; EXTENDED X-RAY; BOND-VALENCE PARAMETERS; CRYSTAL-STRUCTURES; PYROCHLORE GROUP; SYNROC; DAMAGE; IMMOBILIZATION; ZIRKELITE; AMPLITUDE AB The structural environments of Zr, Th, and U in aperiodic (metamict) (Ca,Th)ZrTi2O7 were examined using Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. Samples are aperiodic due to a radiation-induced transformation caused by alpha-decay event damage. In the aperiodic samples, Zr is mainly 7-coordinated [d(Zr-O) almost-equal-to 2.14-2.17 +/- 0.02 angstrom]; whereas, Th is mainly 8-coordinated [d(Th-O) almost-equal-to 2.40-2.41 +/- 0.03 angstrom]. Nearly identical bond lengths and coordination numbers for these elements were determined for an annealed, crystalline sample. The radiation-induced transition from the periodic to the aperiodic state is characterized by a significant broadening of the distribution of (Zr,Th)-O distances. In one metamict sample with almost-equal-to 1.9 wt. % U3O8, U is essentially tetravalent. The absence of higher oxidation states (U6+) is consistent with the lack of evidence for alteration (samples are over 500 million years old). The reduced medium-range order around Zr, Th, and U is related to the increase of alpha-decay event damage and precludes decomposition of zirconolite into simple oxides of Zr, Th, or U. Comparison with other metamict (Zr, Th, U)-bearing phases (e.g., ZrSiO4 and ThSiO4) suggests that Zr4+, Th4+, and U4+ prefer 7-, 8-, and 6-coordinated sites, respectively, in aperiodic phases at ambient temperatures and pressures. Examination of the structure of crystalline (Ca, Th)ZrTi2O7 demonstrates that M-0-M angles (M = Ca, Ti, Zr, and Th) are relatively small (almost-equal-to 100-120-degrees for edge-sharing polyhedra). A limited relaxation of the constraints of periodicity around M cations caused by radiation damage (e.g., tilting of polyhedra) dramatically affects the distribution of these angles. This type of structural relaxation may be the mechanism by which long-range periodicity is lost and medium-range order is reduced with increasing radiation damage, while the major cations retain their nearest-neighbor environments. This relaxation may also help explain the lattice expansion observed in zirkelites when they undergo radiation damage. C1 UNIV MARNE LA VALLEE, F-75252 PARIS 05, FRANCE. UNIV NEW MEXICO, DEPT EARTH & PLANETARY SCI, ALBUQUERQUE, NM 87131 USA. STANFORD UNIV, DEPT GEOL & ENVIRONM SCI, STANFORD, CA 94305 USA. STANFORD UNIV, STANFORD SYNCHROTRON RADIAT LAB, STANFORD, CA 94305 USA. RP FARGES, F (reprint author), INST PHYS GLOBE, GEOMAT LAB, 4 PL JUSSIEU, F-75252 PARIS 05, FRANCE. NR 48 TC 45 Z9 45 U1 0 U2 6 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 32 AVENUE OF THE AMERICAS, NEW YORK, NY 10013-2473 USA SN 0884-2914 J9 J MATER RES JI J. Mater. Res. PD AUG PY 1993 VL 8 IS 8 BP 1983 EP 1995 DI 10.1557/JMR.1993.1983 PG 13 WC Materials Science, Multidisciplinary SC Materials Science GA LR039 UT WOS:A1993LR03900029 ER PT J AU RIGNEY, JD CASTRO, RG LEWANDOWSKI, JJ AF RIGNEY, JD CASTRO, RG LEWANDOWSKI, JJ TI IN-SITU FRACTURE MONITORING OF PLASMA-SPRAYED MOSI2-TA COMPOSITES SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID TEMPERATURE MECHANICAL-PROPERTIES; DUCTILE REINFORCEMENTS; MOLYBDENUM DISILICIDE; LAMINATED COMPOSITES; BRITTLE MATERIALS; CARBON ADDITIONS; TOUGHNESS; STRENGTH; ALLOYS; STRESS AB Initial work has shown that the ambient toughness of brittle silicide intermetallics such as MoSi2 have been toughened by incorporating irregular pancake-shaped Ta phases via deposition of powders by plasma-spray processing techniques. The mechanisms of toughness enhancement were observed in situ by conducting fracture toughness tests in an instrumented loading stage situated in a scanning electron microscope. It was observed that increases in toughness were obtained via ductile-phase toughening and the development of bridged-zones. The initiation and peak toughness of the composites varied with testing orientation, with the highest values measured when the crack plane intersected the Ta particles perpendicular to their edge. The shape of the resistance curve, however, was independent of Ta orientation. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP RIGNEY, JD (reprint author), CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106, USA. NR 31 TC 4 Z9 4 U1 0 U2 0 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD AUG 1 PY 1993 VL 28 IS 15 BP 4023 EP 4027 DI 10.1007/BF00351225 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA LR923 UT WOS:A1993LR92300009 ER PT J AU RAWERS, J ASAI, G DOAN, R AF RAWERS, J ASAI, G DOAN, R TI HIGH-PRESSURE NITROGEN GAS ALLOYING OF FE-CR-NI ALLOYS .2. MECHANICAL-PROPERTIES SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID STEELS AB The melting of Fe-Cr-Ni alloys under 200 MPa nitrogen pressure has shown that nitrogen significantly improves the mechanical properties. Tensile strengths of these high-nitrogen alloys were found to be proportional to interstitial nitrogen concentration. The tensile strengths of nitrogen-alloyed steels could be significantly increased over comparable carbon-alloyed steels. The increase in tensile strength was found to be proportional to the square root of the interstitial nitrogen concentration indicating that the strengthening may be controlled by thermal effects. RP RAWERS, J (reprint author), US BUR MINES,ALBANY RES CTR,ALBANY,OR 97321, USA. NR 16 TC 6 Z9 6 U1 0 U2 0 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD AUG 1 PY 1993 VL 28 IS 15 BP 4028 EP 4032 DI 10.1007/BF00351226 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA LR923 UT WOS:A1993LR92300010 ER PT J AU RANDLE, V LAIRD, G AF RANDLE, V LAIRD, G TI A MICROTEXTURE STUDY OF EUTECTIC CARBIDES IN WHITE CAST IRONS USING ELECTRON BACKSCATTER DIFFRACTION SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID HIGH CHROMIUM; TEXTURE AB White cast irons have a microstructure composed of a ferrous matrix with hexagonal and/or orthorhombic carbides, M7C, and M3C, respectively. The US Bureau of Mines has implemented a study programme to improve microstructure and thereby wear resistance of these alloys. This work included electron back-scatter diffraction in a scanning electron microscope to identify the hexagonal and orthorhombic phases from their crystallography and subsequently establish their microtextures. Crystal structures of these carbides were identified and their microtextures were obtained from specific spatial locations within micrometre resolution. Such resolution allowed the identification of thin shells of M3C (1-5 mum thick) to be distinguished from cores of M7C3 (10-20 mum thick). Microtexture results showed that M7C3 carbides without M3C shells grew predominantly in the [0001] direction, whereas those with M3C shells were much less textured with the M3C shell phase having a random microtexture. C1 US BUR MINES,ALBANY RES CTR,ALBANY,OR 97321. RP RANDLE, V (reprint author), UNIV COLL SWANSEA,SWANSEA SA2 8PP,W GLAM,WALES. NR 22 TC 17 Z9 19 U1 0 U2 5 PU CHAPMAN HALL LTD PI LONDON PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN SN 0022-2461 J9 J MATER SCI JI J. Mater. Sci. PD AUG 1 PY 1993 VL 28 IS 15 BP 4245 EP 4249 DI 10.1007/BF00351261 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA LR923 UT WOS:A1993LR92300045 ER PT J AU WELLER, RE MALAGA, CA BUSCHBOM, RL RAGAN, HA AF WELLER, RE MALAGA, CA BUSCHBOM, RL RAGAN, HA TI URINARY ENZYME CONCENTRATIONS IN THE OWL MONKEY (AOTUS-NANCYMAE) SO JOURNAL OF MEDICAL PRIMATOLOGY LA English DT Article DE URINARY ENZYMES; KIDNEY; OWL MONKEY; CEBIDAE ID BETA-D-GLUCOSAMINIDASE; ALANINE AMINOPEPTIDASE; DIAGNOSTIC-SIGNIFICANCE; ENDOGENOUS SUBSTANCES; RENAL CLEARANCE; NEPHROTOXICITY; EXCRETION; CHEMISTRY; NAG AB The activity of three urinary enzymes, alkaline phosphatase (ALP), aspartate aminotransferase (AST), and N-acetyl-beta-D-glucosaminidase (NAG), was evaluated in 71 adult owl monkeys. Fifty-six animals had normal renal function, while 15 had evidence of renal dysfunction. Urinary enzyme: urinary creatinine ratios (U(E): U(Cr)) were also determined. The activity for NAG was similar to that of other species, while ALP and AST were higher. Regression analyses revealed that urinary enzymes and U(E):U(Cr) were significantly correlated (P less-than-or-equal-to 0.0001) with indices of renal damage and could identify active renal disease. C1 UNIV PUERTO RICO, SAN JUAN, PR 00936 USA. RP WELLER, RE (reprint author), PACIFIC NW LAB, POB 999,P7-52, RICHLAND, WA 99352 USA. NR 30 TC 0 Z9 0 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0047-2565 J9 J MED PRIMATOL JI J. Med. Primatol. PD AUG PY 1993 VL 22 IS 6 BP 340 EP 347 PG 8 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA MQ791 UT WOS:A1993MQ79100002 PM 8138983 ER PT J AU WELLER, RE BUSCHBOM, RL MALAGA, CA RAGAN, HA AF WELLER, RE BUSCHBOM, RL MALAGA, CA RAGAN, HA TI COMPARISON OF BLOOD AND URINE ANALYTES BETWEEN 2 KARYOTYPES OF OWL MONKEY, AOTUS-NANCYMAE AND AOTUS-VOCIFERANS SO JOURNAL OF MEDICAL PRIMATOLOGY LA English DT Note DE BIOCHEMISTRY; REFERENCE VALUES; NIGHT MONKEY; PHENOTYPE; DIVERSITY ID NIGHT MONKEYS; PRIMATES; CEBIDAE; PROTEIN AB Serum and urine analytes were compared between two karyotypes of owl monkey, Aotus nancymae and A. vociferans, to determine if normative clinical pathology data obtained from one karyotype were applicable to the other. Statistically significant differences (P less-than-or-equal-to 0.05) were noted in serum calcium, serum phosphorus, serum sodium, serum potassium, serum urea nitrogen, urine calcium, calcium clearance, and fractional clearance of calcium between the two karyotypes. The results suggest that A. vociferans regulate calcium-phosphorus and electrolyte homeostasis in a manner different from that of A. nancymae. C1 UNIV PUERTO RICO, MED SCI CAMPUS, SAN JUAN, PR 00936 USA. RP WELLER, RE (reprint author), PACIFIC NW LAB, CTR LIFE SCI, POB 999,P7-52, RICHLAND, WA 99352 USA. NR 21 TC 2 Z9 2 U1 0 U2 0 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0047-2565 J9 J MED PRIMATOL JI J. Med. Primatol. PD AUG PY 1993 VL 22 IS 6 BP 368 EP 373 PG 6 WC Veterinary Sciences; Zoology SC Veterinary Sciences; Zoology GA MQ791 UT WOS:A1993MQ79100006 PM 8138987 ER PT J AU SMALL, JH SHEA, KJ LOY, DA AF SMALL, JH SHEA, KJ LOY, DA TI ARYLENE-BRIDGED AND ALKYLENE-BRIDGED POLYSILSESQUIOXANES SO JOURNAL OF NON-CRYSTALLINE SOLIDS LA English DT Article ID STATE SI-29 NMR; HYBRID MATERIALS; NETWORKS; GLASSES AB Bis(triethoxysilyl)arylene monomers 1-5 and the 1,6-bis(trimethoxysilyl)hexylene monomer 6 were hydrolytically condensed under sol-gel conditions using both acid and base catalysts to produce their respective arylene- and alkylene-bridged polysilsesquioxane materials (X-1 through X-6). Polymerization reactions yielded gels within 24 h. One notable exception was the acid-catalyzed polymerization of 2,5-bis(triethoxysilyl)thiophene (X-5-SI) which required approximately 1 month to gel. The gels were processed by extracting with low dielectric solvents or by aqueous extraction. Solid state C-13 and Si-29 CP MAS-NMR, infrared spectroscopy, and gas sorption porosimetry were measured on the xerogels. The materials were transparent, glass-like xerogels with surface areas as high as 1100 m2/g and porosity primarily confined to a micropore region (< 20 angstrom diameters). Xerogels prepared using the aqueous extraction had surface areas between 500 and 956 m2/g. C1 UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717. SANDIA NATL LABS,ALBUQUERQUE,NM 87185. RI Loy, Douglas/D-4847-2009 OI Loy, Douglas/0000-0001-7635-9958 NR 19 TC 46 Z9 49 U1 0 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3093 J9 J NON-CRYST SOLIDS JI J. Non-Cryst. Solids PD AUG PY 1993 VL 160 IS 3 BP 234 EP 246 DI 10.1016/0022-3093(93)91267-7 PG 13 WC Materials Science, Ceramics; Materials Science, Multidisciplinary SC Materials Science GA LT323 UT WOS:A1993LT32300003 ER PT J AU KRISHNAN, S WEBER, JKR ANDERSON, CD NORDINE, PC SHELDON, RI AF KRISHNAN, S WEBER, JKR ANDERSON, CD NORDINE, PC SHELDON, RI TI SPECTRAL EMISSIVITY AND OPTICAL-PROPERTIES AT LAMBDA = 632.8 NM FOR LIQUID URANIUM AND ZIRCONIUM AT HIGH-TEMPERATURES SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article AB The spectral emissivities, refractive indices, and extinction coefficients of pure liquid uranium and zirconium were measured versus temperature by He-Ne laser polarimetry at a wavelength of 632.8 nm. The experiments were conducted under containerless conditions using electromagnetic levitation and heating supplemented by CO2 laser beam heating. Clean liquid metal surfaces were achieved by heating the specimens to high temperatures at which oxides evaporated and nitrides decomposed. Results were obtained for liquid uranium and zirconium in the temperature ranges 2000-2800 K and 2000-2600 K, respectively and included data for liquid zirconium undercooled by 125 K. The spectral emissivity of zirconium was equal to 0.345 and was independent of temperature. The spectral emissivity of uranium increased with temperature from 0.272 at 2000 K to 0.294 at 2800 K. The melting temperature of zirconium was determined from its emissivity and apparent melting temperature to be 2125 +/- 11 K, in good agreement with values in the literature. C1 LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545. RP KRISHNAN, S (reprint author), INTERSON INC,3453 COMMERCIAL AVE,NORTHBROOK,IL 60062, USA. NR 17 TC 17 Z9 17 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 J9 J NUCL MATER JI J. Nucl. Mater. PD AUG PY 1993 VL 203 IS 2 BP 112 EP 121 DI 10.1016/0022-3115(93)90047-3 PG 10 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA LQ143 UT WOS:A1993LQ14300003 ER PT J AU AKABANI, G AF AKABANI, G TI ABSORBED DOSE CALCULATIONS IN HAVERSIAN CANALS FOR SEVERAL BETA-EMITTING RADIONUCLIDES SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article AB A mathematical model of a Haversian canal was used to calculate absorbed dose factors for Sr-90, Y-90, Ca-45, Sr-89, P-32, I-131 and Sm-153. The regions of interest considered in this study were the blood canal, the wall or bone surface and the bone matrix. The source regions were the blood canal ard the bone surface. Absorbed dose calculations were performed with the EGS4-PRESTA Monte Carlo transport code. Dose factors were calculated for Haversian canals of 5-mum to 50-mum radius. These data are also tabulated so that dose factors can be evaluated for other radii. An example is given in which these data are used along with a biokinetic model of a radioactive material in bone to assess doses from diagnostic and radiotherapy procedures. RP AKABANI, G (reprint author), PACIFIC NW LAB, DEPT HLTH PHYS, POB 999,MS K3-70, RICHLAND, WA 99352 USA. NR 10 TC 6 Z9 6 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD AUG PY 1993 VL 34 IS 8 BP 1361 EP 1366 PG 6 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA LP023 UT WOS:A1993LP02300027 PM 8326400 ER PT J AU ATKINS, HL ROBERTSON, JS AKABANI, G AF ATKINS, HL ROBERTSON, JS AKABANI, G TI MIRD DOSE ESTIMATE REPORT NO-17 - RADIATION ABSORBED DOSE ESTIMATES FROM INHALED KRYPTON-81M GAS IN LUNG IMAGING SO JOURNAL OF NUCLEAR MEDICINE LA English DT Article C1 PACIFIC NW LAB, DEPT HLTH PHYS,DIV DOSIMETRY RES, RICHLAND, WA 99352 USA. SUNY, HLTH SCI CTR, DEPT RADIOL, STONY BROOK, NY 11794 USA. RP ATKINS, HL (reprint author), BROOKHAVEN NATL LAB, DEPT MED, COMM MIRD, UPTON, NY 11973 USA. NR 8 TC 3 Z9 3 U1 0 U2 0 PU SOC NUCLEAR MEDICINE INC PI RESTON PA 1850 SAMUEL MORSE DR, RESTON, VA 20190-5316 SN 0161-5505 J9 J NUCL MED JI J. Nucl. Med. PD AUG PY 1993 VL 34 IS 8 BP 1382 EP 1384 PG 3 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA LP023 UT WOS:A1993LP02300030 PM 8326403 ER PT J AU TERRY, AV SILKS, LA DUNLAP, RB ODOM, JD KOSH, JW AF TERRY, AV SILKS, LA DUNLAP, RB ODOM, JD KOSH, JW TI FURTHER BIOLOGICAL-ACTIVITIES OF THE NOVEL CHOLINE ANALOGS SELENONIUM CHOLINE AND ACETYLSELENONIUM CHOLINE SO JOURNAL OF PHARMACOLOGY AND EXPERIMENTAL THERAPEUTICS LA English DT Article ID PYROLYSIS-GAS CHROMATOGRAPHY; RAT-BRAIN; ACETYLCHOLINE; QUANTITATION; SYNAPTOSOMES; METABOLISM AB The pharmacological actions of the novel choline analog, selenonium choline [(CH3)2Se+CH2CH2OH] and its acetyl ester acetylselenonium choline (ASeCh) were studied in vivo and in vitro. ASeCh produced a dose-related decrease in mean arterial pressure in the rat similar to acetylcholine (ACh) but was 1% to 2% as potent. ASeCh demonstrated agonist activity on the rat isolated ileum and was approximately 2% as active as ACh. Selenonium chlorine (SeCh) was taken up and acetylated in brain tissue slices in a time- and concentration-dependent manner. The use of KCl as a loading stimulus did not increase the uptake of SeCh but increased tissue levels of ASeCh 1.5-fold over the control concentrations. The uptake of SeCh was described by a single low-affinity uptake component (K(m) = 167 muM) that was not blocked by hemicholinium-3. In contrast, hemicholinium significantly blocked the acetylation of SeCh. Compared with basal release, depolarization with KCl caused a significant release of ASeCh into the incubation medium. A neural specificity was suggested for the in vitro uptake of SeCh. Acetylation of SeCh in vivo in the rat after intraventricular administration was similar to the extent of acetylation of [H-2(4)]-choline. ASeCh bound to both M1 and M2 cholinergic receptors with 2% to 3% of the affinity observed for ACh. These data suggest that SeCh may satisfy criteria for a false neurotransmitter precursor. C1 UNIV S CAROLINA,COLL PHARM,DEPT CHEM & BIOCHEM,COLUMBIA,SC 29208. LOS ALAMOS NATL LAB,BIOCHEM & SPECTROSCOPY SECT,LOS ALAMOS,NM 87544. OI Terry, Alvin/0000-0003-2071-4767 FU NCRR NIH HHS [RR 02231] NR 47 TC 3 Z9 3 U1 0 U2 0 PU WILLIAMS & WILKINS PI BALTIMORE PA 351 WEST CAMDEN ST, BALTIMORE, MD 21201-2436 SN 0022-3565 J9 J PHARMACOL EXP THER JI J. Pharmacol. Exp. Ther. PD AUG PY 1993 VL 266 IS 2 BP 593 EP 601 PG 9 WC Pharmacology & Pharmacy SC Pharmacology & Pharmacy GA LT482 UT WOS:A1993LT48200017 PM 8355193 ER PT J AU PACHECO, JE PRAIRIE, MR YELLOWHORSE, L AF PACHECO, JE PRAIRIE, MR YELLOWHORSE, L TI PHOTOCATALYTIC DESTRUCTION OF CHLORINATED SOLVENTS IN WATER WITH SOLAR-ENERGY SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article ID HETEROGENEOUS PHOTOCATALYSIS; DEGRADATION; TIO2; DECOMPOSITION; TRICHLOROETHYLENE; SUSPENSIONS; RADIATION; PHENOLS AB Sandia National Laboratories and the National Renewable Energy Laboratory are developing a photocatalytic process to destroy organic contaminants in water. Tests with common water pollutants have been conducted at Sandia's Solar Thermal Facility using a near commercial scale, single-axis tracking parabolic trough system with a glass pipe reactor mounted at its focus. Experiments at this scale provide verification of laboratory studies and allow examination of design and operation issues at a real-life scale. The catalyst, titanium dioxide (TiO2), is a harmless material found in paint, cosmetics, and toothpaste. Experiments were conducted to determine the effects of key process parameters on destruction rates of chlorinated organic compounds that are common water pollutants. In this paper, we summarize the engineering-scale results of these experiments and analyses. RP PACHECO, JE (reprint author), SANDIA NATL LABS,DEPT SOLAR THERMAL TECHNOL 6216,ALBUQUERQUE,NM 87185, USA. NR 24 TC 30 Z9 30 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD AUG PY 1993 VL 115 IS 3 BP 123 EP 129 DI 10.1115/1.2930038 PG 7 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA LU292 UT WOS:A1993LU29200001 ER PT J AU KUTSCHER, CF CHRISTENSEN, CB BARKER, GM AF KUTSCHER, CF CHRISTENSEN, CB BARKER, GM TI UNGLAZED TRANSPIRED SOLAR COLLECTORS - HEAT-LOSS THEORY SO JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME LA English DT Article AB Unglazed transpired solar collectors offer a potentially low cost, high-efficiency option for once-through applications such as preheating air for ventilation, crop drying, and desiccant regeneration. This paper examines the major heat loss mechanisms associated with this concept. Radiation heat loss is determined by considering losses to both the sky and the ground Convective heat losses are obtained by integrating the product of the temperature and velocity profiles in the boundary layer at the downwind edge of the collector This convective heat loss is then expressed in terms of the thermal equivalent length of irradiated absorber and analysis shows that this loss can be very low for large collectors even under windy conditions. These results are incorporated into a simple computer model which predicts collector efficiency as a function of suction velocity, wind speed, ambient temperature, and radiation. Remaining research issues are discussed. RP KUTSCHER, CF (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 22 TC 61 Z9 61 U1 1 U2 15 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0199-6231 J9 J SOL ENERG-T ASME JI J. Sol. Energy Eng. Trans.-ASME PD AUG PY 1993 VL 115 IS 3 BP 182 EP 188 DI 10.1115/1.2930047 PG 7 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA LU292 UT WOS:A1993LU29200010 ER PT J AU SALES, BC CHAKOUMAKOS, BC AF SALES, BC CHAKOUMAKOS, BC TI CHROMATOGRAPHIC DETERMINATION OF THE PHOSPHATE ANIONS IN CRYSTALLINE AND GLASSY NA4NBP3OZ SO JOURNAL OF SOLID STATE CHEMISTRY LA English DT Article ID LIQUID-CHROMATOGRAPHY; NA4NB(PO4)3; STATE RP SALES, BC (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA. RI Chakoumakos, Bryan/A-5601-2016 OI Chakoumakos, Bryan/0000-0002-7870-6543 NR 9 TC 5 Z9 5 U1 0 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0022-4596 J9 J SOLID STATE CHEM JI J. Solid State Chem. PD AUG PY 1993 VL 105 IS 2 BP 406 EP 409 DI 10.1006/jssc.1993.1232 PG 4 WC Chemistry, Inorganic & Nuclear; Chemistry, Physical SC Chemistry GA LT327 UT WOS:A1993LT32700012 ER PT J AU GERASIMOV, A AF GERASIMOV, A TI DIFFUSIVE TRANSPORT ENHANCEMENT AND ESCAPE PROCESSES IN FRICTIONLESS NONLINEAR OSCILLATORS WITH NOISE SO JOURNAL OF STATISTICAL PHYSICS LA English DT Article DE NONLINEAR RESONANCE; DISTRIBUTION FUNCTION; WEAK-NOISE ASYMPTOTICS ID DRIVEN BROWNIAN-MOTION; SYSTEMS AB The time-dependent escape rates and evolution of a distribution density are considered for a Hamiltonian many-dimensional nonlinear oscillator with external noise. The Hamiltonian dynamics is assumed to be nearly integrable and is angle described in terms of isolated nonlinear resonances. In case of a small angle between the resonant oscillations and the resonance line, a dynamic enhancement of diffusion occurs inside the separatrix, leading to a strongly enhanced growth of distribution tails and escape rates even when the resonances are relatively narow. The underlying mechanism of the phenomenon is essentially many-dimensional. RP GERASIMOV, A (reprint author), FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60505 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0022-4715 J9 J STAT PHYS JI J. Stat. Phys. PD AUG PY 1993 VL 72 IS 3-4 BP 555 EP 570 DI 10.1007/BF01048024 PG 16 WC Physics, Mathematical SC Physics GA MA605 UT WOS:A1993MA60500006 ER PT J AU BAKER, GA AF BAKER, GA TI A MARKOV-PROPERTY MONTE-CARLO METHOD - ONE-DIMENSIONAL ISING-MODEL SO JOURNAL OF STATISTICAL PHYSICS LA English DT Article DE MONTE-CARLO; MARKOV PROPERTY; ISING MODEL; CRITICAL PHENOMENA AB In this paper we introduce a new Monte Carlo procedure based on the Markov property. This procedure is particularly well suited to massively parallel computation. We illustrate the method on the critical phenomena of the well known one-dimensional Ising model. In the course of this work we found that the autocorrelation time for the Metropolis Monte Carlo algorithm is closely given by the square of the correlation length. We find speedup factors of the order of 1 million for the method as implemented on the CM2 relative to a serial machine. Our procedure gives error estimates which are quite consistent with the observed deviations from the analytically known exact results. RP BAKER, GA (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 9 TC 3 Z9 3 U1 0 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0022-4715 J9 J STAT PHYS JI J. Stat. Phys. PD AUG PY 1993 VL 72 IS 3-4 BP 621 EP 641 DI 10.1007/BF01048026 PG 21 WC Physics, Mathematical SC Physics GA MA605 UT WOS:A1993MA60500008 ER PT J AU GREENWOOD, MS MAI, JL GOOD, MS AF GREENWOOD, MS MAI, JL GOOD, MS TI ATTENUATION MEASUREMENTS OF ULTRASOUND IN A KAOLIN WATER SLURRY - A LINEAR-DEPENDENCE UPON FREQUENCY SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB The attenuation of ultrasound through a kaolin-water slurry was measured for frequencies ranging from 0.5 to 3.0 MHz. The maximum concentration of the slurry was for a weight percentage of 44% (or a volume fraction of 0.24). The goal of these measurements was to assess the feasibility of using ultrasonic attenuation to determine the concentration of a slurry of known composition. The measurements were obtained by consecutively adding kaolin to the slurry and measuring the attenuation at each concentration. After reaching a maximum concentration a dilution technique was used, in which an amount of slurry was removed and water was added, to obtain the attenuation as a function of the concentration. The dilution technique was the more effective method to obtain calibration data. These measurements were carried out using two transducers, having a center frequency of 2.25 MHz, separated by 0. 101 6 m (4.0 in.). The maximum attenuation measured in these experiments was about 100 Np/m, but the experimental apparatus has the capability of measuring a larger attenuation if the distance between the two transducers is decreased. For a given frequency, the data show that In V/V0 depends linearly upon the volume fraction ( V is the received voltage for the slurry and V0 is that obtained for water). This indicated that each particle acts independently in attenuating ultrasound. The data showed that the attenuation is proportional to the frequency and to the volume fraction. The results demonstrated the feasibility of using attenuation measurements to determine slurry concentration. Several theoretical models are discussed that describe the attenuation of ultrasound. The data obtained by several other researchers also show a linear dependence of attenuation upon frequency. RP GREENWOOD, MS (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 12 TC 23 Z9 24 U1 0 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD AUG PY 1993 VL 94 IS 2 BP 908 EP 916 DI 10.1121/1.408192 PN 1 PG 9 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA LT174 UT WOS:A1993LT17400033 ER PT J AU SWIFT, GW KEOLIAN, RM AF SWIFT, GW KEOLIAN, RM TI THERMOACOUSTICS IN PIN-ARRAY STACKS SO JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA LA English DT Article AB A new thermoacoustic stack geometry, the pin array, is described. Analytical expressions for velocity and temperature in the pin array are derived, and potential advantages of the pin stack are demonstrated. C1 USN,POSTGRAD SCH,DEPT PHYS,MONTEREY,CA 93943. RP SWIFT, GW (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 11 TC 38 Z9 44 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0001-4966 J9 J ACOUST SOC AM JI J. Acoust. Soc. Am. PD AUG PY 1993 VL 94 IS 2 BP 941 EP 943 DI 10.1121/1.408196 PN 1 PG 3 WC Acoustics; Audiology & Speech-Language Pathology SC Acoustics; Audiology & Speech-Language Pathology GA LT174 UT WOS:A1993LT17400037 ER PT J AU DEEPAK EVANS, JW AF DEEPAK EVANS, JW TI CALCULATION OF TEMPERATURES IN MICROWAVE-HEATED 2-DIMENSIONAL CERAMIC BODIES SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID ELECTROMAGNETIC SCATTERING; HISTORY; CARBON AB Temperatures are calculated in a ceramic material exposed to microwaves. The method entails calculation of electromagnetic fields by integral formulation and subsequent solution of the heat conduction equation for temperatures in a ceramic piece. The solution of the equations is numerical and the parameters used are estimates for properties of SiC. The results include a case where the complex dielectric constant is varied with temperature. The computed results demonstrate that SiC can be heated to high temperatures (1000-1500 K) and that both the temperature and the temperature gradient can be controlled by varying the power density of the microwaves and the external cooling. The results also exhibit high sensitivity of temperatures to the dimensions of the material and the orientation in which microwaves impinge on the ceramic body. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 52 TC 3 Z9 4 U1 0 U2 1 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD AUG PY 1993 VL 76 IS 8 BP 1915 EP 1923 PG 9 WC Materials Science, Ceramics SC Materials Science GA LZ615 UT WOS:A1993LZ61500002 ER PT J AU DEEPAK EVANS, JW AF DEEPAK EVANS, JW TI MATHEMATICAL-MODEL FOR CHEMICAL-VAPOR INFILTRATION IN A MICROWAVE-HEATED PREFORM SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID CERAMIC COMPOSITES; DENSIFICATION; FABRICATION AB A mathematical model, in which mass fluxes are expressed according to the ''dusty gas'' model, is proposed to describe densification of a ceramic preform by chemical vapor infiltration (CVI). Local temperatures previously computed for a preform subjected to microwaves are input to the mass transport model. The model is solved numerically for deposition of SiC from trichloromethylsilane in a porous SiC preform. The computed results clearly demonstrate an advantage in employing microwave heating in CVI. Also, greater infiltration is achieved in a preform of greater pore size and at lower temperature. However, for successful infiltration, diffusion/chemical-reaction-controlled CVI is shown to impose limits on the preform size. C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. NR 18 TC 6 Z9 6 U1 0 U2 1 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD AUG PY 1993 VL 76 IS 8 BP 1924 EP 1929 DI 10.1111/j.1151-2916.1993.tb08313.x PG 6 WC Materials Science, Ceramics SC Materials Science GA LZ615 UT WOS:A1993LZ61500003 ER PT J AU LARSON, RS AF LARSON, RS TI KINETICS OF SILICON-NITRIDE CHEMICAL-VAPOR-DEPOSITION FROM SILICON TETRAFLUORIDE AND AMMONIA SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID ALPHA-SI3N4; SI3N4; SIF4; NH3 AB Rate laws for the chemical vapor deposition of Si3N4 from SiF4 and NH3 are obtained by fitting the results of parametric reactor experiments with a one-dimensional steady-state model for the reactor. The model includes axial mass transport by both convection and multicomponent diffusion, and allowance is made for the use of an experimentally determined temperature profile. Global kinetic expressions with adjustable constants are used to account for deposition on both crystalline and amorphous surfaces, as well as the heterogeneous decomposition of NH3. In addition, there are mechanisms that determine the actual degree of surface crystallinity at any location. Optimum values for the rate constants are found by searching for the best overall fit to the experimental deposition rate and crystallinity data. It is shown that the model, with simple second-order expressions for the deposition rates, is quite successful in reproducing the experimentally observed effects of temperature, How rate, reactant mole ratio, and axial position. RP SANDIA NATL LABS, DEPT THERMAL & FLUID MECH, LIVERMORE, CA 94551 USA. NR 17 TC 4 Z9 4 U1 0 U2 1 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0002-7820 EI 1551-2916 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD AUG PY 1993 VL 76 IS 8 BP 1930 EP 1936 DI 10.1111/j.1151-2916.1993.tb08314.x PG 7 WC Materials Science, Ceramics SC Materials Science GA LZ615 UT WOS:A1993LZ61500004 ER PT J AU RAMAMURTY, U KIM, AS SURESH, S PETROVIC, JJ AF RAMAMURTY, U KIM, AS SURESH, S PETROVIC, JJ TI MICROMECHANISMS OF CREEP-FATIGUE CRACK-GROWTH IN A SILICIDE-MATRIX COMPOSITE WITH SIC PARTICLES SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID MOLYBDENUM DISILICIDE COMPOSITES; CYCLIC LOADS; HIGH-TEMPERATURES; ALUMINA; MOSI2; DEFORMATION; PROPAGATION; CERAMICS; CARBIDE; FAILURE AB An experimental study has been conducted to examine the cyclic fatigue crack growth characteristics in 1200-degrees-C air of a MoSi2-50 mol% WSi2 alloy in the unreinforced condition and with 30 vol% SiC particles. For comparison purposes, crack growth experiments under sustained loads were also carried out in the silicide-matrix composite. Particular attention is devoted to developing an understanding of the micromechanisms of subcritical crack growth by recourse to optical and electron microscopy, including transmission electron microscopy of crack-tip damage. The results indicate that enhanced viscous flow of glass films along interfaces and grain boundaries imparts pronounced levels of subcritical crack growth in the composite material; the composite exhibits a higher fatigue fracture threshold and a more extended range of stable fracture than the unreinforced alloy. The effects of glass phase in influencing fatigue crack growth in the silicide-based material are compared to the influence of in situ-formed and preexisting glass films on high-temperature cyclic fatigue crack growth in ceramics and ceramic composites. The paper concludes with a comparison of present results with the high-temperature damage tolerance or a variety of intermetallic alloys and ceramic materials. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP RAMAMURTY, U (reprint author), BROWN UNIV,DIV ENGN,PROVIDENCE,RI 02912, USA. RI Ramamurty, Upadrasta/E-5623-2011 NR 37 TC 34 Z9 34 U1 0 U2 4 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD AUG PY 1993 VL 76 IS 8 BP 1953 EP 1964 DI 10.1111/j.1151-2916.1993.tb08317.x PG 12 WC Materials Science, Ceramics SC Materials Science GA LZ615 UT WOS:A1993LZ61500007 ER PT J AU KLEEBE, HJ CINIBULK, MK CANNON, RM RUHLE, M AF KLEEBE, HJ CINIBULK, MK CANNON, RM RUHLE, M TI STATISTICAL-ANALYSIS OF THE INTERGRANULAR FILM THICKNESS IN SILICON-NITRIDE CERAMICS SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Article ID HOT-PRESSED SI3N4; GRAIN-BOUNDARY-PHASE; CREEP; GLASS; CRYSTALLIZATION; STRENGTH AB Silicon nitride materials typically reveal thin amorphous intergranular films along grain boundaries, with only the exception of special boundaries. It is known that such grain-boundary films strongly affect the high-temperature properties of the bulk material. High-resolution electron microscopy (HREM) was used to study these amorphous films in different Si3N4 ceramics. The observed film thicknesses at grain boundaries in these materials varied between 5 and 15 angstrom. It was shown that the grain-boundary film thickness strongly depends on film chemistry. Careful inspections of film-thickness measurements across grain boundaries in a given material suggest that the film widths vary on the order of 1 angstrom. Therefore, a quantitative evaluation should allow for the determination of the standard deviation of the film thickness. The amorphous film widths along grain boundaries in four materials were measured over the entire length (up to 1 mum) of the grain boundary between two triple points. Forty to fifty data points were evaluated for each boundary, giving a Gaussian-like distribution of the film thickness around a median value, which corresponded well with the film width measured from single HREM micrographs. The accuracy achieved by the statistical method was better than +/- 1 angstrom. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP KLEEBE, HJ (reprint author), MAX PLANCK INST MET RES,INST WERKSTOFFWISSENSCH,D-70174 STUTTGART,GERMANY. RI Kleebe, Hans-Joachim/C-5709-2016 NR 33 TC 218 Z9 219 U1 5 U2 21 PU AMER CERAMIC SOC PI WESTERVILLE PA 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 SN 0002-7820 J9 J AM CERAM SOC JI J. Am. Ceram. Soc. PD AUG PY 1993 VL 76 IS 8 BP 1969 EP 1977 DI 10.1111/j.1151-2916.1993.tb08319.x PG 9 WC Materials Science, Ceramics SC Materials Science GA LZ615 UT WOS:A1993LZ61500009 ER PT J AU CHEN, WJ ESPENSON, JH BAKAC, A AF CHEN, WJ ESPENSON, JH BAKAC, A TI KINETICS AND MECHANISM OF THE REACTION OF CHLOROPLATINUM(II) COMPLEXES WITH ALKYL RADICALS SO JOURNAL OF THE CHINESE CHEMICAL SOCIETY LA English DT Article DE RADICAL; PLATINUM; KINETICS; RADICAL PROBE ID CHLORO LIGANDS; AQUO LIGANDS; IONS; OH AB The reaction between certain platinum(II) complexes and alkyl radicals produces an unstable organoplatinum(III) intermediate, {Pt(III)-R}. The kinetics of this step were evaluated by laser flash photolysis with ABTS2- (2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) ion) and TMPD (tetramethylphenylenediamine) as kinetic probes. The rate constants for PtCl42- are: k(Pt)/10(8) L mol-1 s-1 = 5.2, 2.8 and 0.27 for CH3, C2H5 and CH2Cl in aqueous solution at pH 1. Those with cis-Pt(NH3)2Cl2 are somewhat smaller, and those for Pt(NH3)42+ too small to measure with this technique. The product analysis indicates that the decomposition of organoplatinum takes place by hydrolysis and (for R = C2H5 only) by beta-elimination. The kinetic isotope effect on the beta-elimination of DCH2CH2PtCl42- is k(H)/k(D) = 1.2. The beta-elimination step produces a Pt(III)-hydride that releases hydrogen gas and forms {Pt(III)-OH}. The short-lived Pt(III) intermediate may disproportionate or oxidize the Co(II) complex that is produced in the radical-generating step. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP CHEN, WJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 24 TC 0 Z9 0 U1 1 U2 2 PU CHINESE CHEM SOC PI TAIPEI PA PO BOX 609, TAIPEI 10099, TAIWAN SN 0009-4536 J9 J CHIN CHEM SOC-TAIP JI J. Chin. Chem. Soc. PD AUG PY 1993 VL 40 IS 4 BP 329 EP 335 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA LV968 UT WOS:A1993LV96800002 ER PT J AU UMINO, S NEWMAN, J AF UMINO, S NEWMAN, J TI DIFFUSION OF SULFURIC-ACID IN CONCENTRATED-SOLUTIONS SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article AB The restricted diffusion method was used to measure the differential diffusion coefficient of sulfuric acid in water at 25-degrees-C for the concentration range from 0.3 to 7.5 molar. The concentration gradients of diffusing species were observed by Rayleigh interferometry. Experimental transport data are analyzed with concentrated solution theory of electrolytes in order to elucidate macroscopic transport characteristics of sulfuric acid in terms of specific binary interactions in solution. Results indicate that the transport properties of sulfuric acid are determined by the hydrogen ion-water molecule interaction. C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. RP UMINO, S (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720, USA. RI Newman, John/B-8650-2008 OI Newman, John/0000-0002-9267-4525 NR 15 TC 14 Z9 14 U1 0 U2 8 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD AUG PY 1993 VL 140 IS 8 BP 2217 EP 2221 DI 10.1149/1.2220798 PG 5 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA LR296 UT WOS:A1993LR29600018 ER PT J AU KASAPBASIOGLU, H HESKETH, PJ MACRANDER, AT AF KASAPBASIOGLU, H HESKETH, PJ MACRANDER, AT TI FABRICATION OF A GROOVED SINGLE-CRYSTAL SILICON X-RAY ANALYZER SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID SI AB Silion x-ray analyzer crystals were microfabricated by dicing and etching 10.3 cm (4-inch) diam, 1.35 mm thick, undoped float zone (111) silicon wafers. These analyzer crystals are intended for a beam line at the Advanced Photon Source synchrotron accelerator ring under construction at the Argonne National Laboratory. Parallel and perpendicular, 1 mm spaced grooves were cut on the silicon wafers using an automated dicing saw. The grooves were cut at 15-degrees and 105-degrees to the [110] primary flat to avoid crystallographic cleavage directions because mechanical strength was desired. The depth of the grooves was 1.15 mm, which was 85% of the wafer thickness. The two cutting parameters, progressive cutting thickness, and feed rate were optimized to reduce saw damage and chipping. Saw damage, which extended over a region of about 30 mum from grooves was removed by isotropic etching. The quality of the single crystal was tested by measuring the width of x-rav rocking curves with a double-crystal diffractometer. The best width obtained with 11.2 arc-s. Since the ideal full width at half maximum (FWHM) according to x-rav dynamical diffraction theory is 9.7 arc-s, a broadening function with a FWHM of only 5.6 arc-s is present due to residual strains (quadrature addition is assumed). C1 ARGONNE NATL LAB,ADV PHOTON SOURCE,ARGONNE,IL 60439. RP KASAPBASIOGLU, H (reprint author), UNIV ILLINOIS,DEPT ELECT ENGN & COMP SCI,MICROFABRICAT APPLICAT LAB,CHICAGO,IL 60680, USA. NR 14 TC 4 Z9 4 U1 0 U2 0 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 10 SOUTH MAIN STREET, PENNINGTON, NJ 08534 SN 0013-4651 J9 J ELECTROCHEM SOC JI J. Electrochem. Soc. PD AUG PY 1993 VL 140 IS 8 BP 2319 EP 2323 DI 10.1149/1.2220816 PG 5 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA LR296 UT WOS:A1993LR29600037 ER PT J AU RIFFE, DM WANG, XY DOWNER, MC FISHER, DL TAJIMA, T ERSKINE, JL MORE, RM AF RIFFE, DM WANG, XY DOWNER, MC FISHER, DL TAJIMA, T ERSKINE, JL MORE, RM TI FEMTOSECOND THERMIONIC EMISSION FROM METALS IN THE SPACE-CHARGE-LIMITED REGIME SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID IMAGE-POTENTIAL STATES; PHOTOELECTRIC-EMISSION; 2-PHOTON PHOTOEMISSION; ELECTRON-EMISSION; ENERGY-SPECTRUM; LASER-PULSES; RELAXATION; TUNGSTEN AB We study femtosecond-laser-pulse-induced electron emission from W(100), Al(110), and Ag(111) in the sub-damage regime (1-44 mJ/cm2 fluence) by simultaneously measuring the incident-light reflectivity, total electron yield, and electron-energy distribution curves of the emitted electrons. The total-yield results are compared with a space-charge-limited extension of the Richardson-Dushman equation for short-time-scale thermionic emission and with particle-in-a-cell computer simulations of femtosecond-pulsed-induced thermionic emission. Quantitative agreement between the experimental results and two calculated temperature-dependent yields is obtained and shows that the yield varies linearly with temperature beginning at a threshold electron temperature of approximately 0.25 eV. The particle-in-a-cell simulations also reproduce the experimental electron-energy distribution curves. Taken together, the experimental results, the theoretical calculations, and the results of the simulations indicate that thermionic emission from nonequilibrium electron heating provides the dominant source of the emitted electrons. Furthermore, the results demonstrate that a quantitative theory of space-charge-limited femtosecond-pulse-induced electron emission is possible. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP RIFFE, DM (reprint author), UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712, USA. NR 51 TC 79 Z9 81 U1 2 U2 14 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3224 J9 J OPT SOC AM B JI J. Opt. Soc. Am. B-Opt. Phys. PD AUG PY 1993 VL 10 IS 8 BP 1424 EP 1435 DI 10.1364/JOSAB.10.001424 PG 12 WC Optics SC Optics GA LT187 UT WOS:A1993LT18700016 ER PT J AU MELENDRES, CA BEDEN, B BOWMAKER, G LIU, C MARONI, VA AF MELENDRES, CA BEDEN, B BOWMAKER, G LIU, C MARONI, VA TI SYNCHROTRON INFRARED-SPECTROSCOPY OF H2O ADSORBED ON POLYCRYSTALLINE GOLD SO LANGMUIR LA English DT Letter ID VIBRATIONAL-SPECTRA; METAL-SURFACES; WATER; RADIATION; ADSORPTION; CLUSTERS; CU(100); RU(001); CO AB Synchrotron infrared spectra of H2O adsorbed on a polycrystalline gold surface have been obtained for the first time. Water was found to adsorb molecularly and associatively on gold at low temperatures, i.e., 100-140 K. For example, at 117 K and exposure of 0.3 langmuirs, the O-H stretching vibration was observed at 3387 cm-1, which is indicative of hydrogen-bonded surface water. Bands attributed to frustrated translation were observed at about 230 and 290 cm-1; a band at 817 cm-1 was assigned to frustrated rotational motion. The assignments were confirmed through isotopic shift measurements with D2O. The observed spectra are suggestive of the formation of (HOH)n clusters at low coverage; with increasing coverage, the formation of an ordered multilayer with an icelike structure is apparent. C1 UNIV POITIERS,CHIM LAB 1,CNRS,UA 350,F-86034 POITIERS,FRANCE. UNIV AUCKLAND,DEPT CHEM,AUCKLAND,NEW ZEALAND. RP MELENDRES, CA (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 14 TC 12 Z9 12 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG PY 1993 VL 9 IS 8 BP 1980 EP 1982 DI 10.1021/la00032a013 PG 3 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA LU396 UT WOS:A1993LU39600013 ER PT J AU CARNAHAN, NF QUINTERO, L PFUND, DM FULTON, JL SMITH, RD CAPEL, M LEONTARITIS, K AF CARNAHAN, NF QUINTERO, L PFUND, DM FULTON, JL SMITH, RD CAPEL, M LEONTARITIS, K TI A SMALL-ANGLE X-RAY-SCATTERING STUDY OF THE EFFECT OF PRESSURE ON THE AGGREGATION OF ASPHALTENE FRACTIONS IN PETROLEUM FLUIDS UNDER NEAR-CRITICAL SOLVENT CONDITIONS SO LANGMUIR LA English DT Article ID MOLECULAR-DYNAMICS SIMULATIONS; LIQUID-LIQUID INTERFACE; WATER OIL INTERFACE; SUPERCRITICAL FLUIDS; NEUTRON-SCATTERING; REVERSE MICELLES; AMPHIPHILIC MOLECULES; COMPUTER-SIMULATION; SIZE DISTRIBUTION; LATTICE MODEL AB Small angle X-ray scattering was used to determine the effect of pressure on the extent of asphaltene aggregation for a system under near-critical conditions. A mixture containing 60 vol % Crude Oil A in n-pentane was studied at 110-degrees-C, at pressures ranging from 25 to 400 bar. As the pressure of the near-critical solution is isothermally decreased, these results indicate (1) an increase in the extent of asphaltene aggregation and/or (2) increased attractive interactions among aggregates. Information derived from different regions of the X-ray scattering curve indicate increasing aggregation with decreasing pressure. From these experimental results, together with theoretical interpretation, we infer that as the pressure is reduced, increased aggregation of asphaltenes results which may contribute to formation damage in hydrocarbon reservoirs, and to fouling in hydrotreatment and cracking catalysts. C1 PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. BROOKHAVEN NATL LAB, DEPT BIOL, NATL SYNCHROTRON LIGHT SOURCE, UPTON, NY 11973 USA. CORE LABS INC, RES & TECHNOL DEV, HOUSTON, TX 77040 USA. RP CARNAHAN, NF (reprint author), RICE UNIV, DEPT CHEM ENGN, POB 1892, HOUSTON, TX 77251 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 90 TC 54 Z9 55 U1 0 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG PY 1993 VL 9 IS 8 BP 2035 EP 2044 DI 10.1021/la00032a023 PG 10 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA LU396 UT WOS:A1993LU39600023 ER PT J AU SMITH, DH JOHNSON, GK DADYBURJOR, DB AF SMITH, DH JOHNSON, GK DADYBURJOR, DB TI CONTINUOUS PHASES IN EMULSIONS OF 3 LIQUIDS SO LANGMUIR LA English DT Article ID MORPHOLOGIES; MICROEMULSION; PATTERNS; BEHAVIOR; MIXTURES; SYSTEM AB For three-phase (macro)emulsions formed by the top (T), middle (M), and bottom (B) phases of amphiphile/oil/water systems, it has been variously stated in the literature either (1) that the continuous phase is always M or (2) that the continuous phase is B below the phase inversion temperature (PIT) and T above the PIT. We show by means of isothermal electrical conductivity measurements at various temperatures on emulsions of known phase volume fractions that neither hypothesis is generally correct. For our experimental conditions the ''choice'' of continuous phase depends on the phase volume fractions, and at all temperatures-by appropriate choice of phase volume fractions-any of T, M, or B may be made the continuous phase. C1 W VIRGINIA UNIV,DEPT CHEM ENGN,MORGANTOWN,WV 26506. UNIV OKLAHOMA,INST APPL SURFACTANT RES,NORMAN,OK 73019. UNIV OKLAHOMA,SCH CHEM ENGN & MAT SCI,NORMAN,OK 73019. RP SMITH, DH (reprint author), US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26507, USA. NR 22 TC 14 Z9 14 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0743-7463 J9 LANGMUIR JI Langmuir PD AUG PY 1993 VL 9 IS 8 BP 2089 EP 2092 DI 10.1021/la00032a030 PG 4 WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA LU396 UT WOS:A1993LU39600030 ER PT J AU SPANNER, GE NUNO, JP CHANDRA, C AF SPANNER, GE NUNO, JP CHANDRA, C TI TIME-BASED STRATEGIES - THEORY AND PRACTICE SO LONG RANGE PLANNING LA English DT Article ID QUALITY AB As firms compete in a global environment, the need for integrating functions in organizations is being felt more than ever. Firms are realizing that to sustain long-term competitive advantages, business strategies have to be linked to functional strategies. 'Time' provides this.missing link. Recent research supports the use of time-based competition strategy in defining corporate objectives, outlining strategic programmes and measuring productivity and performance in 'time' units rather than money. A time-based model of strategies is described Time is used in conjunction with other strategies to offer a strategic mix which best suits various market segments of a company's product portfolio. In this way, companies may create a prolonged record of success and be highly focused to market needs. C1 ARIZONA STATE UNIV, TEMPE, AZ 85287 USA. RP SPANNER, GE (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 28 TC 6 Z9 6 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0024-6301 J9 LONG RANGE PLANN JI Long Range Plan. PD AUG PY 1993 VL 26 IS 4 BP 90 EP 101 DI 10.1016/0024-6301(93)90062-K PG 12 WC Business; Management; Planning & Development SC Business & Economics; Public Administration GA LT660 UT WOS:A1993LT66000011 ER PT J AU HUANG, JC LO, YS GRAY, GT AF HUANG, JC LO, YS GRAY, GT TI THE RESPONSE OF METAL-MATRIX COMPOSITES SUBJECTED TO QUASI-STATIC AND SHOCK-WAVE DEFORMATION SO MATERIALS CHEMISTRY AND PHYSICS LA English DT Article ID SUBSTRUCTURE EVOLUTION; MECHANICAL-PROPERTIES; MICROSTRUCTURE; ALUMINUM; ALLOY; FP AB The mechanical response and substructure evolution of three composites (Al-Li alloy reinforced with 55 vol.% Al2O3 long fibers, P/M aluminium alloy X7091 reinforced with 30 vol.% B4C particulates, and Ti-6Al-4V alloy reinforced with 42 vol.% B4C-coated B long fibers) subjected to shock loading (strain rate > 10(6) s-1) and quasistatic compression or tension (strain rate almost-equal-to 10(-3) s-1) were examined. The as-received materials were first characterized in terms of both the phase identification of the interfacial reaction products and the measurement of basic low-rate mechanical properties. The materials were shock-loaded using a gas launcher to a peak shock pressure of nominally 5 GPa. Post-shock reload tests at quasi-static strain rates were then applied to the shock prestrained composites in order to trace the mechanical response due to shock loading. The dynamic deformation behavior was compared to that during quasi-static deformation. The results showed that the passage of a shock wave can produce appreciable damage to composites, especially for fiber-reinforced materials. This damage is attributed to the fact that tensile waves are induced whenever the shock wave encounters a ceramic/metal interface in a composite, owing to the shock impedance mismatch. Finally, the substructure evolution and deformation/fracture behavior of the composites after dynamic and quasi-static loading are compared and discussed in light of single-phase material response to shock-loading. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP HUANG, JC (reprint author), NATL SUN YAT SEN UNIV,INST MAT SCI,KAOHSIUNG,TAIWAN. RI Huang, J. /C-4276-2013 NR 20 TC 8 Z9 8 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0254-0584 J9 MATER CHEM PHYS JI Mater. Chem. Phys. PD AUG PY 1993 VL 35 IS 1 BP 71 EP 85 PG 15 WC Materials Science, Multidisciplinary SC Materials Science GA LP402 UT WOS:A1993LP40200013 ER PT J AU FERRIS, KF AF FERRIS, KF TI DIPOLAR INDICATORS OF SITE ACIDITY IN METAL-OXIDES SO MATERIALS LETTERS LA English DT Article ID ATOMIC POLAR TENSORS; INFRARED INTENSITIES AB The atomic polar tensor and its rotational invariants have been determined for SiO2 and SiO4H3X as model compounds for silicate-based materials. The rotational invariants, effective atomic charge (chi(n)) and charge normalized anisotropy (alpha(n)) and dipole (gamma(n)) are used to characterize the charge distribution and chemical environment of the atomic sites. Comparison of alpha(n) and gamma(n) with a series of known Bronsted and Lewis acids and bases suggests that these rotational invariants may act as indicators for metal-oxide site acidities. Multiple chemical bonds can make these quantities particularly sensitive to basis set and electron correlation effects. RP FERRIS, KF (reprint author), PACIFIC NW LAB, DEPT MAT SCI, RICHLAND, WA 99352 USA. NR 21 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-577X J9 MATER LETT JI Mater. Lett. PD AUG PY 1993 VL 17 IS 3-4 BP 146 EP 151 DI 10.1016/0167-577X(93)90074-8 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LV500 UT WOS:A1993LV50000010 ER PT J AU WALTON, OR AF WALTON, OR TI NUMERICAL-SIMULATION OF INCLINED CHUTE FLOWS OF MONODISPERSE, INELASTIC, FRICTIONAL SPHERES SO MECHANICS OF MATERIALS LA English DT Article; Proceedings Paper CT 2ND US / JAPAN SEMINAR ON MECHANICS OF GRANULAR MATERIALS CY AUG 05-09, 1991 CL CLARKSON UNIV, POTSDAM, NY HO CLARKSON UNIV ID GRANULAR FLOW; ASSEMBLIES AB Molecular-dynamics-like simulations are utilized to map regions of flow parameter space where steady flows occur for monodisperse assemblies of inelastic, frictional spheres, flowing down frictional, inclined planar surfaces. The trajectory-following technique utilizes nearly-rigid particles interacting via contact forces and gravity. Energy losses in the simulations occur only via displacement-dependent hysteretic loading/unloading paths and sliding friction. Initial scoping calculations are examining flows on an incline tilted 17-degrees from the horizontal, determining the boundaries of various flow regimes. Assemblies of inelastic spheres with interparticle friction coefficients less than the tangent of the inclination angle accelerate unboundedly. Those with friction coefficients somewhat greater than the tangent of the inclination angle develop steady velocity and density profiles for a variety of flow depths but result in arrested flow for coefficients of friction greatly exceeding the inclination angle tangent (e.g., by more than a factor of 2). Conversely, a significant range of inclination angles that will result in steady flows for a given set of assembly properties, is expected to exist. RP WALTON, OR (reprint author), LAWRENCE LIVERMORE NATL LAB,ENERGY PROGRAM,L-207,POB 808,LIVERMORE,CA 94550, USA. NR 27 TC 141 Z9 143 U1 0 U2 8 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-6636 J9 MECH MATER JI Mech. Mater. PD AUG PY 1993 VL 16 IS 1-2 BP 239 EP 247 DI 10.1016/0167-6636(93)90048-V PG 9 WC Materials Science, Multidisciplinary; Mechanics SC Materials Science; Mechanics GA LQ372 UT WOS:A1993LQ37200028 ER PT J AU KASSNER, ME TOLLE, MC ROSEN, RS HENSHALL, GA ELMER, JW AF KASSNER, ME TOLLE, MC ROSEN, RS HENSHALL, GA ELMER, JW TI VOID NUCLEATION IN CONSTRAINED SILVER INTERLAYERS AND VOID GROWTH AND COALESCENCE IN CONSTRAINED SILVER INTERLAYERS - DISCUSSION SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Note ID FAILURE; WELDS C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP KASSNER, ME (reprint author), OREGON STATE UNIV,DEPT MECH ENGN,CORVALLIS,OR 97331, USA. NR 12 TC 0 Z9 0 U1 1 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD AUG PY 1993 VL 24 IS 8 BP 1877 EP 1878 DI 10.1007/BF02657862 PG 2 WC Materials Science, Multidisciplinary SC Materials Science GA LQ725 UT WOS:A1993LQ72500017 ER PT J AU SHI, N ARSENAULT, RJ AF SHI, N ARSENAULT, RJ TI INFLUENCE OF THERMALLY-INDUCED PLASTICITY ON THE BAUSCHINGER EFFECT OF SIC/AL COMPOSITES SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Note ID METAL-MATRIX COMPOSITES; FIBER; STRESS C1 UNIV MARYLAND,DEPT MAT & NUCL ENGN,COLL PK,MD 20742. RP SHI, N (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 18 TC 9 Z9 9 U1 0 U2 0 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD AUG PY 1993 VL 24 IS 8 BP 1879 EP 1882 DI 10.1007/BF02657864 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA LQ725 UT WOS:A1993LQ72500019 ER PT J AU WARREN, WL SCHWANK, JR SHANEYFELT, MR FLEETWOOD, DM WINOKUR, PS MASZARA, WP MCKITTERICK, LB AF WARREN, WL SCHWANK, JR SHANEYFELT, MR FLEETWOOD, DM WINOKUR, PS MASZARA, WP MCKITTERICK, LB TI RADIATION-INDUCED DEFECT CENTERS IN BONDED AND ETCHBACK SOI MATERIALS SO MICROELECTRONIC ENGINEERING LA English DT Article; Proceedings Paper CT 8TH BIENNIAL CONF ON INSULATING FILMS ON SEMICONDUCTORS CY JUN 02-05, 1993 CL DELFT, NETHERLANDS SP ELSEVIER, DELFT UNIV TECHNOL, FDN FUNDAMENTAL STUDIES MATTER, PHILIPS RES, COMMISS EUROPEAN COMMUNITIES AB Defect centers generated in vacuum-ultraviolet and x-ray irradiated bonded and etchback silicon-on-insulator materials have been characterized using electron paramagnetic resonance studies. Three defect centers identified are the classic E(gamma)' center (O3=Si. +Si=O3), the amorphous silicon center (.Si=Si3), typically called the D-center, and a new center that we attribute to a dislodged hydrogen atom that encounters and is trapped at a delocalized spin center. RP WARREN, WL (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-9317 J9 MICROELECTRON ENG JI Microelectron. Eng. PD AUG PY 1993 VL 22 IS 1-4 BP 387 EP 390 DI 10.1016/0167-9317(93)90194-A PG 4 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Optics; Physics, Applied SC Engineering; Science & Technology - Other Topics; Optics; Physics GA LV299 UT WOS:A1993LV29900075 ER PT J AU HELLMANNBLUMBERG, U HINTZ, MFM GATEWOOD, JM SCHMID, CW AF HELLMANNBLUMBERG, U HINTZ, MFM GATEWOOD, JM SCHMID, CW TI DEVELOPMENTAL DIFFERENCES IN METHYLATION OF HUMAN ALU REPEATS SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID DNA METHYLATION; POLYMERASE-III; MOUSE EMBRYO; GERM-CELLS; SEQUENCES; GENE; EXPRESSION; CPG; 5-METHYLCYTOSINE; TRANSCRIPTION AB Alu repeats are especially rich in CpG dinucleotides, the principal target sites for DNA methylation in eukaryotes. The methylation state of Alus in different human tissues is investigated by simple, direct genomic blot analysis exploiting recent theoretical and practical advances concerning Alu sequence evolution. Whereas Alus are almost completely methylated in somatic tissues such as spleen, they are hypomethylated in the male germ line and tissues which depend on the differential expression of the paternal genome complement for development. In particular, we have identified a subset enriched in young Alus whose CpGs appear to be almost completely unmethylated in sperm DNA. The existence of this subset potentially explains the conservation of CpG dinucleotides in active Alu source genes. These profound, sequence-specific developmental changes in the methylation state of Alu repeats suggest a function for Alu sequences at the DNA level, such as a role in genomic imprinting. C1 UNIV CALIF DAVIS,DEPT CHEM,DAVIS,CA 95616. UNIV CALIF DAVIS,DEPT BIOCHEM,DAVIS,CA 95616. UNIV CALIF DAVIS,DEPT GENET,DAVIS,CA 95616. LOS ALAMOS NATL LAB,DIV LIFE SCI 2,LOS ALAMOS,NM 87545. FU NIGMS NIH HHS [GM21346] NR 36 TC 108 Z9 110 U1 0 U2 0 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0270-7306 J9 MOL CELL BIOL JI Mol. Cell. Biol. PD AUG PY 1993 VL 13 IS 8 BP 4523 EP 4530 PG 8 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA LN405 UT WOS:A1993LN40500008 PM 8336699 ER PT J AU HSU, CL STEVENS, A AF HSU, CL STEVENS, A TI YEAST-CELLS LACKING 5'-]3' EXORIBONUCLEASE-1 CONTAIN MESSENGER-RNA SPECIES THAT ARE POLY(A) DEFICIENT AND PARTIALLY LACK THE 5' CAP STRUCTURE SO MOLECULAR AND CELLULAR BIOLOGY LA English DT Article ID TRANSFER PROTEIN-BETA; SACCHAROMYCES-CEREVISIAE; STRAND EXCHANGE; CODING REGION; TRANSLATION INITIATION; GENE; STABILITY; MUTATIONS; SEQUENCE; DECAY AB Analysis of the slowed turnover rates of several specific MRNA species and the higher cellular levels of some of these mRNAs in Saccharomyces cerevisiae lacking 5' --> 3' exoribonuclease 1 (xrn1 cells) has led to the finding that these yeast contain higher amounts of essentially full-length mRNAs that do not bind to oligo(dT)-cellulose. On the other hand, the length of mRNA poly(A) chains found after pulse-labeling of cells lacking the exoribonuclesse, the cellular rate of synthesis of oligo(dT)-bound mRNA, and the initial rate of its deadenylation appeared quite similar to the same measurements in wild-type yeast cells. Examination of the 5' cap structure status of the poly(A)-deficient mRNAs by comparative analysis of the m7G content of poly(A)- and poly(A)+ RNA fractions of wild-type and xrn1 cells suggested that the xrn1 poly(A) - mRNA fraction is low in cap structure content. Further analysis of the 5' termini by measurements of the rate of 5' --> 3' exoribonuclease 1 hydrolysis of specific full-length mRNA species showed that approximately 50% of the xrn1 poly(A)-deficient mRNA species lack the cap structure. Primer extension analysis of the 5' terminus of ribosomal protein 51A (RP51A) mRNA showed that about 30% of the poly(A)-deficient molecules of the xrn1 cells are slightly shorter at the 5' end. The finding of some accumulation of poly(A)-deficient mRNA species partially lacking the cap structure together with the reduction of the rate of mRNA turnover in cells lacking the enzyme suggest a possible role for 5' --> 3' exoribonuclease 1 in the mRNA turnover process. C1 OAK RIDGE NATL LAB, DIV BIOL, OAK RIDGE, TN 37831 USA. FU NCI NIH HHS [CA 09336]; NIGMS NIH HHS [GM42144] NR 49 TC 297 Z9 303 U1 0 U2 7 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1752 N ST NW, WASHINGTON, DC 20036-2904 USA SN 0270-7306 EI 1098-5549 J9 MOL CELL BIOL JI Mol. Cell. Biol. PD AUG PY 1993 VL 13 IS 8 BP 4826 EP 4835 PG 10 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA LN405 UT WOS:A1993LN40500039 PM 8336719 ER PT J AU BLUESTEIN, HB LADUE, JG STEIN, H SPEHEGER, D UNRUH, WP AF BLUESTEIN, HB LADUE, JG STEIN, H SPEHEGER, D UNRUH, WP TI DOPPLER RADAR WIND SPECTRA OF SUPERCELL TORNADOES SO MONTHLY WEATHER REVIEW LA English DT Article ID WINDSPEEDS; VORTICES; FIELD AB A storm-intercept team from the University of Oklahoma, using the Los Alamos National Laboratory portable, continuous wave/frequency modulated-continuous wave, 3-cm Doppler radar, collected close-range data at and below cloud base in six supercell tornadoes in the southern plains during the springs of 1990 and 1991. Data collection and analysis techniques are described. Wind spectra from five weak-to-strong tornadoes and from one violent tornado are presented and discussed in conjunction with simultaneous boresighted video documentation, photogrammetric analysis, and damage surveys. Maximum Doppler wind speeds of 55-105 m s-1 were found in five of the tornadoes; wind speeds as high as 120-125 m s-1 were found in a large tornado during an outbreak on 26 April 1991. These may be the highest wind speeds ever measured by Doppler radar and the first radar measurements of F-5 intensity wind speeds. The variation in the spectrum across the 26 April 1991 tornado is presented. Standard and mobile soundings, and surface data, used to determine the ''thermodynamic speed limit'' indicate that it was usually exceeded by 50%-100%. A comparison of actual Doppler spectra with simulated spectra suggests that the maximum in radar reflectivity in supercell tornadoes lies well outside the core. C1 LOS ALAMOS NATL LAB,SENSOR SYST & ROBOT GRP,LOS ALAMOS,NM 87544. RP BLUESTEIN, HB (reprint author), UNIV OKLAHOMA,SCH METEOROL,100 E BOYD,ROOM 1310,NORMAN,OK 73019, USA. NR 34 TC 52 Z9 53 U1 1 U2 3 PU AMER METEOROLOGICAL SOC PI BOSTON PA 45 BEACON ST, BOSTON, MA 02108-3693 SN 0027-0644 J9 MON WEATHER REV JI Mon. Weather Rev. PD AUG PY 1993 VL 121 IS 8 BP 2200 EP 2221 DI 10.1175/1520-0493(1993)121<2200:DRWSOS>2.0.CO;2 PG 22 WC Meteorology & Atmospheric Sciences SC Meteorology & Atmospheric Sciences GA LP877 UT WOS:A1993LP87700003 ER PT J AU CROW, JE PARKIN, DM SULLIVAN, NS AF CROW, JE PARKIN, DM SULLIVAN, NS TI MATERIALS SCIENCE IN HIGH MAGNETIC-FIELDS SO MRS BULLETIN LA English DT Article C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87544. NATL SCI FDN,NATL HIGH MAGNET FIELD LAB PROGRAM,WASHINGTON,DC 20550. UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. RP CROW, JE (reprint author), FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306, USA. NR 10 TC 2 Z9 2 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD AUG PY 1993 VL 18 IS 8 BP 17 EP 18 PG 2 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LR935 UT WOS:A1993LR93500005 ER PT J AU FISK, Z SCHRIEFFER, JR AF FISK, Z SCHRIEFFER, JR TI HIGHLY CORRELATED ELECTRON-SYSTEMS SO MRS BULLETIN LA English DT Article ID HIGH-TC SUPERCONDUCTIVITY; SPIN FLUCTUATIONS; UNCONVENTIONAL SUPERCONDUCTIVITY; MAGNETIC ORDER; BAG MECHANISM; STATE; UPT3; U2ZN17; UBE13 C1 FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306. RP FISK, Z (reprint author), LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87544, USA. NR 26 TC 0 Z9 0 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD AUG PY 1993 VL 18 IS 8 BP 23 EP 27 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LR935 UT WOS:A1993LR93500006 ER PT J AU BEDELL, KS SILVERA, IF SULLIVAN, NS AF BEDELL, KS SILVERA, IF SULLIVAN, NS TI SPIN-POLARIZED QUANTUM FLUIDS AND SOLIDS SO MRS BULLETIN LA English DT Article ID NUCLEAR MAGNETIC ORDER; ATOMIC-HYDROGEN; 3-BODY RECOMBINATION; BCC HE-3; LIQUID-HE-3; EXCHANGE; FIELD C1 LOS ALAMOS NATL LAB,CORRELATED ELECTRON THEORY PROGRAM,LOS ALAMOS,NM 87544. HARVARD UNIV,CAMBRIDGE,MA 02138. UNIV FLORIDA,DEPT PHYS,GAINESVILLE,FL 32611. UNIV FLORIDA,NATL HIGH MAGNET FIELD LAB PROGRAM,GAINESVILLE,FL 32611. RP BEDELL, KS (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87544, USA. NR 33 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD AUG PY 1993 VL 18 IS 8 BP 38 EP 43 PG 6 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LR935 UT WOS:A1993LR93500008 ER PT J AU LARBALESTIER, DC MALEY, MP AF LARBALESTIER, DC MALEY, MP TI CONDUCTORS FROM SUPERCONDUCTORS - CONVENTIONAL LOW-TEMPERATURE AND NEW HIGH-TEMPERATURE SUPERCONDUCTING CONDUCTORS SO MRS BULLETIN LA English DT Article ID CRITICAL CURRENTS; CURRENT-DENSITY; MAGNETIC-FIELD; FILMS; DEFECTS; TAPES C1 UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. UNIV WISCONSIN,DEPT MAT SCI & ENGN,MADISON,WI 53706. LOS ALAMOS NATL LAB,CTR SUPERCONDUCTING TECHNOL,LOS ALAMOS,NM 87544. RP LARBALESTIER, DC (reprint author), UNIV WISCONSIN,CTR APPL SUPERCONDUCT,MADISON,WI 53706, USA. RI Larbalestier, David/B-2277-2008 OI Larbalestier, David/0000-0001-7098-7208 NR 23 TC 32 Z9 32 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD AUG PY 1993 VL 18 IS 8 BP 50 EP 56 PG 7 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LR935 UT WOS:A1993LR93500010 ER PT J AU EMBURY, JD HILL, MA SPITZIG, WA SAKAI, Y AF EMBURY, JD HILL, MA SPITZIG, WA SAKAI, Y TI MICROSTRUCTURAL ASPECTS OF MATERIALS FOR NONDESTRUCTIVE LONG-PULSE HIGH-FIELD MAGNETS SO MRS BULLETIN LA English DT Article ID CU-NB ALLOYS; MECHANISMS; STRENGTH C1 LOS ALAMOS NATL LAB,MAT TECHNOL GRP,METALLOG SECT,LOS ALAMOS,NM 87544. NATL RES INST MET,TOKYO 153,JAPAN. IOWA STATE UNIV SCI & TECHNOL,INST PHYS RES & TECHNOL,AMES,IA 50011. RP EMBURY, JD (reprint author), MCMASTER UNIV,DEPT MAT SCI & ENGN,HAMILTON L8S 4L8,ONTARIO,CANADA. NR 11 TC 8 Z9 8 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI PITTSBURGH PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237 SN 0883-7694 J9 MRS BULL JI MRS Bull. PD AUG PY 1993 VL 18 IS 8 BP 57 EP 60 PG 4 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LR935 UT WOS:A1993LR93500011 ER PT J AU RUSSELL, LB RINCHIK, EM AF RUSSELL, LB RINCHIK, EM TI STRUCTURAL DIFFERENCES BETWEEN SPECIFIC-LOCUS MUTATIONS INDUCED BY DIFFERENT EXPOSURE REGIMES IN MOUSE SPERMATOGONIAL STEM-CELLS SO MUTATION RESEARCH LA English DT Article DE SPECIFIC-LOCUS MUTATIONS; (MOUSE); STRUCTURAL NATURE OF MUTATIONS; SPERMATOGENIC STAGE, EFFECT OF; EXPOSURE REGIME, EFFECT OF; STEM-CELL SPERMATOGONIA, DIFFERENCES AMONG; SENSITIZED SPERMATOGONIA; MOLECULAR ANALYSIS OF VIABLE MUTATIONS ID GERM-LINE MUTATIONS; INDUCTION; CHLORAMBUCIL; MELPHALAN; DELETIONS AB It was first shown by W.L. Russell (1962), and confirmed by him and others, that a 24-h interval between dose fractions (but not shorter or longer ones) elevates the rate of radiation-induced spermatogonial specific-locus mutations to levels considerably above the linear extrapolation made from lower-dose results. We have now analyzed the nature of mutations induced either in previously undisturbed or in ''sensitized'' spermatogonial stem cells, i.e., those that received a challenging dose of X-rays 24 h following a priming dose. Results are based on molecular studies of a large set of viable albino mutations [using probes derived from the tyrosinase (c) gene and from the regions surrounding c], and on retrospective classifications of mutations at c and two additional loci into LL (large lesions), IG (intragenic mutations), and OL (other lesions), utilizing criteria developed earlier. A significant difference (P = 0.016) was found between previously undisturbed and sensitized stem-cell spermatogonia; the latter have a higher LL/IG ratio, similar to the ratio observed for mutations induced in poststem-cell stages. This finding of a qualitative difference indicates that the additional mutations produced by a 24-h fractionated treatment are the result of the second (challenging) dose. The qualitative difference, further, indicates that the mutation-rate-augmenting effects of 24-h fractionation are not due, merely, to an increase (caused by the priming dose) of a normally responsive component of the spermatogonial population. The finding that the additional mutations that are produced by the challenging dose are primarily large DNA lesions suggests that the nuclear state of sensitized stem-cell spermatogonia may be different from the state of previously undisturbed spermatogonia. This state, which appears to be similar to that of postspermatonial stages, may be conducive to the formation of LLs, even by agents that are not LL inducers in other systems. The results further indicate that the relative paucity of LLs characteristic of treated (previously undisturbed) spermatogonial stem cells is probably not the result of selection against such mutations during subsequent germ-cell development. RP RUSSELL, LB (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA. FU NIEHS NIH HHS [IAG 222Y01-ES-10067] NR 26 TC 25 Z9 25 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8262 J9 MUTAT RES PD AUG PY 1993 VL 288 IS 2 BP 187 EP 195 DI 10.1016/0027-5107(93)90084-S PG 9 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA LP719 UT WOS:A1993LP71900001 PM 7688077 ER PT J AU ROHATGI, US NEYMOTIN, LY WULFF, W AF ROHATGI, US NEYMOTIN, LY WULFF, W TI ASSESSMENT OF RAMONA-3B METHODOLOGY WITH OSCILLATORY FLOW TESTS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article ID BOILING WATER-REACTORS; NONLINEAR DYNAMICS; STABILITY AB The instability event at the LaSalle County Plant (GE BWR-5) imposed a new challenge on the computer codes available for reactor transient analysis. While the codes were originally designed to predict non-oscillatory transients, the new requirement on the code is to model limit cycle oscillations with large amplitudes, where feed-back effects from the core and the balance of plant, and the nonlinear effects are significant. Two of the United States Nuclear Regulatory Commission's (USNRC) computer codes, namely RAMONA-3B/MODO [1] and HIPA-BWR of Engineering Plant Analyzer [2] were expected, and are shown in part in this paper, to meet the above demands. The RAMONA-3B/MODI has now been upgraded from the RAMONA-3B/MODO. It has a three dimensional neutron kinetics model, coupled to multi-channel nonequilibrium drift-flux formulation, and an explicit integration scheme for the thermal hydraulics. The accuracy of the thermohydraulics in the RAMONA-3B code was assessed for the new application by modelling oscillatory transients in the FRIGG test facilty. Nodalization studies showed that twenty-four axial nodes are sufficient for a converged solution; calculations with twelve axial nodes produce, in comparison to the 24-node calculation, the deviation of 4.4% in the peak gain of the power to flow transfer function. The code predicted correctly the effects of power and inlet subcooling on the transfer function gain and the system resonance frequency. For the six available tests modeled, the code-predicted peak gain differs from the experimentally obtained gain on the average by +7%, with the standard deviation of +/- 30%. The uncertainty in the experimental data lies between -11% and +12%. The difference between predicted and measured frequency at the peak gain on the average is -6%, with the standard deviation of +/- 14%. RP ROHATGI, US (reprint author), BROOKHAVEN NATL LAB,DEPT NUCL ENERGY,UPTON,NY 11973, USA. NR 26 TC 7 Z9 7 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 143 IS 1 BP 69 EP 82 DI 10.1016/0029-5493(93)90276-F PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX994 UT WOS:A1993LX99400006 ER PT J AU PENNELL, WE AF PENNELL, WE TI HEAVY-SECTION STEEL TECHNOLOGY PROGRAM OVERVIEW SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 18TH WATER REACTOR SAFETY INFORMATION MEETING CY OCT 22-24, 1990 CL ROCKVILLE, MD AB This paper presents a status review of ongoing HSST program tasks aimed at refining the technology used in analysis of reactor pressure vessel fracture margins under pressurized thermal-shock (PTS) loading. Specific fracture-technology issues addressed include vessel flaw density and distribution, shallow flaws, fractures-toughness data transfer, circumferential cracks, ductile tearing and the influence of low-tearing toughness in stainless steel cladding. Preliminary results from the analysis and test programs are presented, together with interim assessments of their potential impact on a reactor vessel PTS analysis. RP PENNELL, WE (reprint author), OAK RIDGE NATL LAB,DIV ENGN TECHNOL,OAK RIDGE,TN 37831, USA. NR 30 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 117 EP 135 DI 10.1016/0029-5493(93)90197-H PG 19 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100002 ER PT J AU COOPER, SE LOFGREN, EV SAMANTA, PK WONG, SM AF COOPER, SE LOFGREN, EV SAMANTA, PK WONG, SM TI DEPENDENT FAILURE ANALYSIS OF NPP DATA-BASES SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 18TH WATER REACTOR SAFETY INFORMATION MEETING CY OCT 22-24, 1990 CL ROCKVILLE, MD AB A technical approach for analyzing plant-specific data bases for vulnerabilities to dependent failures has been developed and applied. Since the focus of this work is to aid in the formulation of defenses to dependent failures, rather than to quantify dependent failure probabilities, the approach of this analysis is critically different. For instance, the determination of component failure dependencies has been based upon identical failure mechanisms related to component piecepart failures, rather than failure modes. Also, component failures involving all types of component function loss (e.g., catastrophic, degraded, incipient) are equally important to the predictive purposes of dependent failure defense development. Consequently, dependent component failures are identified with a different dependent failure definition which uses a component failure mechanism categorization scheme in this study. In this context, clusters of component failures which satisfy the revised dependent failure definition are termed common failure mechanism (CFM) events. Motor-operated valves (MOVs) in two nuclear power plant data bases have been analyzed with this approach. The analysis results include seven different failure mechanism categories; identified potential CFM events; an assessment of the risk-significance of the potential CFM events using existing probabilistic risk assessments (PRAs); and postulated defenses to the identified potential CFM events. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. RP COOPER, SE (reprint author), SCI APPLICAT INT CORP,11251 ROGER BACON DR,POB 4875,RESTON,VA 22090, USA. NR 5 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 137 EP 153 DI 10.1016/0029-5493(93)90198-I PG 17 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100003 ER PT J AU PHILLIPS, JH ROESENER, WS MAGLEBY, HL GEIDL, V AF PHILLIPS, JH ROESENER, WS MAGLEBY, HL GEIDL, V TI INCORPORATION OF PASSIVE COMPONENTS AGING INTO PRAS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 18TH WATER REACTOR SAFETY INFORMATION MEETING CY OCT 22-24, 1990 CL ROCKVILLE, MD AB The probabilistic risk assessments being developed at most nuclear power plants to calculate the risk of core damage generally focus on the possible failure of active components. The possible failure of passive components is given little consideration. We are developing a method for selecting risk-significant passive components and including them in probabilistic risk assessments. We demonstrated the method by selecting a weld in the auxiliary feedwater system. The selection of this component was based on expert judgement of the likelihood of failure and on an estimate of the consequence of component failure to plant safety. We then used the PRAISE computer code to perform a probabilistic structural analysis to calculate the probability that crack growth due to aging would cause the weld to fail. The calculation included the effects of mechanical loads and thermal transients considered in the design and the effects of thermal cycling caused by a leaking check valve. We modified an existing probabilistic risk assessment (NUREG-1150 plant) to include the possible failure of the auxiliary feedwater weld, and then we used the weld failure probability as input to the modified probabilistic risk assessment to calculate the change in plant risk with time. The results showed that if the failure probability of the selected weld is high, the effect on plant risk is significant. However, this particular calculation showed a very low weld failure probability and no change in plant risk for the 48 years of service analyzed. The success of this demonstration shows that this method could be applied to nuclear power plants. C1 UNIV IDAHO,MOSCOW,ID 83843. RP PHILLIPS, JH (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 11 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 167 EP 177 DI 10.1016/0029-5493(93)90200-S PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100005 ER PT J AU OLAND, CB NAUS, DJ ARNDT, EG AF OLAND, CB NAUS, DJ ARNDT, EG TI RESEARCH-AND-DEVELOPMENT AT THE STRUCTURAL-MATERIALS INFORMATION-CENTER SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 18TH WATER REACTOR SAFETY INFORMATION MEETING CY OCT 22-24, 1990 CL ROCKVILLE, MD AB The U.S. Nuclear Regulatory Commission has initiated a Structural Aging Program at the Oak Ridge National Laboratory to identify potential structural safety issues related to continued service of nuclear power plants and to establish criteria for evaluating and resolving these issues. One of the tasks in this program focuses on the establishment of a Structural Materials Information Center where long-term and environment-dependent properties of concretes and other structural materials are being collected and assembled into a data base. These properties will be used to evaluate the current condition of critical structural components in nuclear power plants and to estimate their future performance during the continued service period. C1 US NUCL REGULATORY COMMISS,RES,SSEB,ROCKVILLE,MD 20852. RP OLAND, CB (reprint author), OAK RIDGE NATL LAB,POB 2009,MS 8056,OAK RIDGE,TN 37831, USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 179 EP 187 DI 10.1016/0029-5493(93)90201-J PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100006 ER PT J AU LEHNER, JR LIN, CC NEOGY, P AF LEHNER, JR LIN, CC NEOGY, P TI IDENTIFICATION AND ASSESSMENT OF CONTAINMENT AND RELEASE MANAGEMENT STRATEGIES SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article; Proceedings Paper CT 18TH WATER REACTOR SAFETY INFORMATION MEETING CY OCT 22-24, 1990 CL ROCKVILLE, MD AB Brookhaven National Laboratory, under the auspices of the U.S. Nuclear Regulatory Commission, is investigating accident management strategies which could help preserve containment integrity or minimize the release of radioactivity during a severe accident in a nuclear reactor. The objective is to make use of existing plant systems and equipment in innovative ways to reduce the likelihood of containment failure or to mitigate the release of fission products to the environment if failure cannot be prevented. Many of these strategies would be implemented during the later stages of a severe accident, i.e. after the molten core penetrates the reactor vessel. Significant uncertainties exist regarding some of the phenomena involved with this phase of a severe accident. The identification and assessment process for containment and release strategies is described, and some insights derived from its application to a BWR Mark I plant are presented. A station blackout accident for this kind of plant is considered. The challenges encountered are identified and existing emergency guidelines are reviewed. where needed and when possible, new strategies are devised. The feasibility and effectiveness of these new strategies are assessed, making due allowances for the complicated phenomena and associated uncertainties involved. Both beneficial and adverse effects of the suggested strategies are considered. RP LEHNER, JR (reprint author), BROOKHAVEN NATL LAB,DEPT NUCL ENERGY,BLDG 130,UPTON,NY 11973, USA. NR 17 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 189 EP 208 DI 10.1016/0029-5493(93)90202-K PG 20 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100007 ER PT J AU VO, TV GORE, BF SIMONEN, FA DOCTOR, SR AF VO, TV GORE, BF SIMONEN, FA DOCTOR, SR TI RISK ASSESSMENT IN SETTING INSERVICE INSPECTION PRIORITIES AT LIGHT-WATER REACTORS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article AB As part of the Nondestructive Evaluation Reliability Program, sponsored by the U.S. Nuclear Regulatory Commission, Pacific Northwest Laboratory is developing a method that uses risk-based approaches to establish inservice inspection plans for nuclear power plant components. The method first uses probabilistic risk assessment (PRA) results and Failure Modes and Effects Analysis (FEMA) techniques to identify and prioritize the most risk-important systems and components for inspection. The acceptable level of risk from structural failure for important systems and components is then apportioned as a small fraction of the total PRA estimated risk for core damage. This process determines the target (acceptable) risk and failure probability values for individual components. The Surry Unit 1 Nuclear Power Station was selected for pilot applications of the method. The specific systems addressed are the reactor pressure vessel, the reactor coolant, the low-pressure injection, and the auxiliary feedwater. The results provide a risk-based ranking of components within these systems and relate the target risk to target failure probability values for individual components, These results will be used to guide the development of improved inspection plans for nuclear power plants. RP VO, TV (reprint author), PACIFIC NW LAB, POB 999,BATTELLE BLVD, RICHLAND, WA 99352 USA. NR 12 TC 1 Z9 1 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 239 EP 253 DI 10.1016/0029-5493(93)90206-O PG 15 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100011 ER PT J AU PENNELL, WE AF PENNELL, WE TI HEAVY-SECTION STEEL TECHNOLOGY PROGRAM - RECENT DEVELOPMENTS IN CRACK INITIATION AND ARREST RESEARCH SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article AB Technology for the analysis of crack initiation and arrest is central to the reactor pressure vessel fracture-margin-assessment process. Regulatory procedures for nuclear plants utilize this technology to assure the retention of adequate fracture-prevention margins throughout the plant operating license period. As nuclear plants age and regulatory procedures dictate that fracture- margin assessments be performed, interest in the fracture-mechanics technology incorporated into those procedures has heightened. This has led to proposals from a number of sources for development and refinement of the underlying crack-initiation and arrest-analysis technology. This paper presents an overview of ongoing Heavy-Section Steel Technology (HSST) Program research aimed at refining the fracture toughness data used in the analysis of fracture margins under pressurized-thermal-shock loading conditions. RP PENNELL, WE (reprint author), OAK RIDGE NATL LAB,DIV ENGN TECHNOL,OAK RIDGE,TN 37831, USA. NR 35 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 255 EP 266 DI 10.1016/0029-5493(93)90207-P PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100012 ER PT J AU TSUKIMORI, K LIU, WK URAS, RA AF TSUKIMORI, K LIU, WK URAS, RA TI FORMULATION OF DYNAMIC STABILITY OF FLUID-FILLED SHELLS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article ID TRANSIENT FAILURE ANALYSIS; EXCITATION AB A method of analysis is introduced to study the dynamic stability characteristics of fluid-filled shells. The governing equations including dynamic fluid-structure interaction are derived using a Galerkin/Finite Element approach. The induced modal coupling in circumferential and axial directions is identified. The importance of geometrical imperfection is emphasized in the derivation of the set of equations which govern the dynamic stability of fluid-filled shells. C1 ARGONNE NATL LAB,DIV REACTOR ENGN,ARGONNE,IL 60439. RP TSUKIMORI, K (reprint author), NORTHWESTERN UNIV,DEPT MECH ENGN,EVANSTON,IL 60208, USA. RI Liu, Wing/B-7599-2009 NR 12 TC 2 Z9 2 U1 0 U2 3 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 267 EP 297 DI 10.1016/0029-5493(93)90208-Q PG 31 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100013 ER PT J AU TSUKIMORI, K LIU, WK TSAO, YH URAS, RA AF TSUKIMORI, K LIU, WK TSAO, YH URAS, RA TI DYNAMIC STABILITY CHARACTERISTICS OF FLUID-FILLED SHELLS UNDER MULTIPLE EXCITATIONS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article ID TRANSIENT FAILURE ANALYSIS; HORIZONTAL EXCITATION AB The membrane forces induced by horizontal ground motion are derived to be used in the coupled Hill's equations for a complete dynamic stability analysis. Excellent agreement between theoretical and available experimental results is obtained. A majority of buckling modes can be correctly identified by considering a geometrical imperfection. The influence of the imperfection on the dynamic buckling characteristics is also discussed. C1 ARGONNE NATL LAB,DIV REACTOR ENGN,ARGONNE,IL 60439. RP TSUKIMORI, K (reprint author), NORTHWESTERN UNIV,DEPT MECH ENGN,EVANSTON,IL 60208, USA. RI Liu, Wing/B-7599-2009 NR 5 TC 2 Z9 2 U1 0 U2 2 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 299 EP 318 DI 10.1016/0029-5493(93)90209-R PG 20 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100014 ER PT J AU NAUS, DJ OLAND, CB ELLINGWOOD, B MORI, Y ARNDT, EG AF NAUS, DJ OLAND, CB ELLINGWOOD, B MORI, Y ARNDT, EG TI AN OVERVIEW OF THE ORNL NRC PROGRAM TO ADDRESS AGING OF CONCRETE STRUCTURES IN NUCLEAR-POWER-PLANTS SO NUCLEAR ENGINEERING AND DESIGN LA English DT Article AB The Structural Aging (SAG) Program is being conducted at the Oak Ridge National Laboratory (ORNL) for the Nuclear Regulatory Commission (NRC). The SAG Program is addressing the aging management of safety-related concrete structures in nuclear power plants for the purpose of providing improved technical bases for their continued service. The program is organized into four tasks: Program Management, Materials Property Data Base, Structural Component Assessment/Repair Technologies, and Quantitative Methodology for Continued Service Determinations. Objectives and a summary of accomplishments under each of these tasks are presented. C1 US NUCL REGULATORY COMMISS,WASHINGTON,DC 20555. JOHNS HOPKINS UNIV HOSP,BALTIMORE,MD 21218. RP NAUS, DJ (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 39 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER SCIENCE SA LAUSANNE PI LAUSANNE 1 PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND SN 0029-5493 J9 NUCL ENG DES JI Nucl. Eng. Des. PD AUG PY 1993 VL 142 IS 2-3 BP 327 EP 339 DI 10.1016/0029-5493(93)90211-Q PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LX991 UT WOS:A1993LX99100016 ER PT J AU LILLY, MJ NELSON, JW BORAM, DP AF LILLY, MJ NELSON, JW BORAM, DP TI ATTRACTING MORE RESOURCES TO THE UNITED-STATES DOES SURPLUS FACILITIES SO NUCLEAR ENGINEERING INTERNATIONAL LA English DT Article RP LILLY, MJ (reprint author), US DOE,OFF ENVIRONM RESTORAT,EM 423,TREVION II,19901 GERMANTOWN RD,GERMANTOWN,MD 20874, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU REED BUSINESS PUBLISHING LTD PI SUTTON PA QUADRANT HOUSE THE QUADRANT, SUTTON, SURREY, ENGLAND SM2 5AS SN 0029-5507 J9 NUCL ENG INT JI Nucl. Eng. Int. PD AUG PY 1993 VL 38 IS 469 BP 26 EP 29 PG 4 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LR739 UT WOS:A1993LR73900006 ER PT J AU ASAKURA, N FONCK, RJ JAEHNIG, KP KAYE, SM LEBLANC, B OKABAYASHI, M AF ASAKURA, N FONCK, RJ JAEHNIG, KP KAYE, SM LEBLANC, B OKABAYASHI, M TI TOROIDAL ROTATION AND ION HEATING DURING NEUTRAL BEAM INJECTION IN PBX-M SO NUCLEAR FUSION LA English DT Article ID DOUBLET-III TOKAMAK; EDGE ELECTRIC-FIELD; DIII-D TOKAMAK; LIMITER DISCHARGES; CHARGE-TRANSFER; TFTR TOKAMAK; H TRANSITION; PLASMA; MOMENTUM; CONFINEMENT AB Determination of the profiles of the ion temperature and the plasma toroidal rotation has been accomplished by charge exchange recombination spectroscopy in PBX-M. The angular momentum and the thermal ion energy transport have been studied mainly during the H mode phase of a high beta(p) discharge (I(p) approximately 330 kA, 3.5 x 10(19) less-than-or-equal-to n(e)BAR less-than-or-equal-to 6.5 x 10(19) m-3) having different heating beam configurations (combination of two perpendicular and two tangential neutral beam injections, abbreviated as 2 perp. NBI and 2 parall. NBI). The toroidal rotation velocity V(phi) rises substantially in the region of r/a greater-than-or-equal-to 0.5 after the L-H transition, and the V(phi) profile (peakedness) is more highly dependent on the beam configuration than the T(i) profile. The angular momentum confinement time varies from 147 ms (rigid rotation for 2 perp. NBI) to 39 ms (viscous rotation for 2 parall. NBI). In contrast, the thermal energy confinement time is 44-48 ms and is almost independent of the configuration. The transport analysis shows that the radial angular momentum diffusion is caused mainly by the viscous losses and that the angular momentum diffusivity chi(phi) is reduced substantially in the outer minor radius region during the 2 perp. NBI H mode. The neoclassical friction effect between the bulk ions and the impurities may influence the chi(phi) profiles locally, where the ion temperature gradient is steep. For all cases, the corrected chi(phi) profiles become similar to the profiles of the thermal energy diffusivity chi(eff) rather than the profiles of the ion energy diffusivity chi(i). For 2 perp. NBI, chi(phi) is smaller than chi(eff) over the outer minor radius of the plasma (r/a greater-than-or-equal-to 1/2), and for 2 parall. NBI, chi(phi) approximately 1.5 chi(eff). The results for the chi(phi) profiles are quantitatively consistent with the variation of the momentum confinement times. C1 JAERI,NAKA,IBARAKI 31101,JAPAN. UNIV WISCONSIN,MADISON,WI 53706. RP ASAKURA, N (reprint author), PRINCETON UNIV,PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544, USA. NR 48 TC 33 Z9 34 U1 1 U2 1 PU INT ATOMIC ENERGY AGENCY PI VIENNA PA WAGRAMERSTRASSE 5, PO BOX 100, A-1400 VIENNA, AUSTRIA SN 0029-5515 J9 NUCL FUSION JI Nucl. Fusion PD AUG PY 1993 VL 33 IS 8 BP 1165 EP 1184 DI 10.1088/0029-5515/33/8/I06 PG 20 WC Physics, Fluids & Plasmas SC Physics GA MJ688 UT WOS:A1993MJ68800006 ER PT J AU BENCH, GS ANTOLAK, AJ MORSE, DH PONTAU, AE SAINT, A LEGGE, GJF AF BENCH, GS ANTOLAK, AJ MORSE, DH PONTAU, AE SAINT, A LEGGE, GJF TI ON THE EFFECT OF BEAM SPATIAL BROADENING IN ION MICROTOMOGRAPHY (IMT) IMAGE QUALITY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Article ID STIM TOMOGRAPHY; PROTON AB Ion microtomography (IMT) is a quantitative MeV ion beam technique capable of mapping spatial variations in specimen density. IMT images are obtained from ion energy loss measurements using computed tomography methods. Multiple scattering of individual ions results in cumulative small directional changes that can ultimately lead to significant spatial broadening of the focussed microbeam. Quantitative studies on the effect of beam spatial broadening on IMT image quality have not previously been performed and current reconstruction methods ignore this effect when computing cross-sectional density images. In this work, the effect of beam spatial broadening on IMT image quality is examined and an algorithm that partially corrects for it is described for specimens with suitable composition. The algorithm is initially tested by considering a single slice of a simulated test object in which spatial broadening out of the plane of the slice is neglected. This approximation has a negligible effect on the corrected image quality in this case since the test object geometry is taken to be identical over neighbouring slices. The correction algorithm is then applied to measured data collected from a single slice of a specimen having similar properties as the test object. Comparisons between the measured and simulated data show qualitative agreement. Results with spatial broadening corrections are presented for contiguous multi-slice data of other samples. It is shown that beam spatial broadening can have an appreciable effect on IMT image quality. C1 SANDAI NATL LABS,LIVERMORE,CA 94551. UNIV MELBOURNE,SCH PHYS,PARKVILLE,VIC 3052,AUSTRALIA. RP BENCH, GS (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT PHYS,POB 808,L-397,LIVERMORE,CA 94551, USA. NR 15 TC 4 Z9 4 U1 2 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-583X J9 NUCL INSTRUM METH B JI Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms PD AUG PY 1993 VL 82 IS 3 BP 447 EP 458 DI 10.1016/0168-583X(93)95995-H PG 12 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR332 UT WOS:A1993LR33200011 ER PT J AU GESTIN, JF FAIVRECHAUVET, A MEASE, RC SAIMAUREL, C THEDREZ, P SLINKIN, M MEINKEN, GE SRIVASTAVA, SC CHATAL, JF AF GESTIN, JF FAIVRECHAUVET, A MEASE, RC SAIMAUREL, C THEDREZ, P SLINKIN, M MEINKEN, GE SRIVASTAVA, SC CHATAL, JF TI INTRODUCTION OF 5 POTENTIALLY METABOLIZABLE LINKING GROUPS BETWEEN IN-111 CYCLOHEXYL EDTA DERIVATIVES AND F(AB')2 FRAGMENTS OF ANTICARCINOEMBRYONIC ANTIGEN-ANTIBODY .1. A NEW REPRODUCIBLE SYNTHETIC METHOD SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article ID MONOCLONAL-ANTIBODY; SERUM STABILITY; DTPA; RADIOIMMUNODETECTION; BIODISTRIBUTION; CARCINOMA; LINKAGES; CHELATE; TUMOR; MICE AB The purpose of this study was to synthesize new bifunctional linker-chelating agents for the modification of the in vivo distribution of In-111-labeled antibodies. A general simple synthetic method of preparing cyclohexyl EDTA (CDTA) derivatives containing a linker/spacer group is described. Linkers prepared included a diester, a six carbon aliphatic chain, two thioethers and a disulfide group. The CDTA-linker compounds were coupled to F(Ab')2 fragments of anti-carcinoembryonic antigen monoclonal antibody and labeled with In-111 with good retention of immunoreactivity. C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. RP GESTIN, JF (reprint author), INSERM,UNIT 211,F-44035 NANTES,FRANCE. RI GESTIN, Jean-Francois/M-1505-2015; Faivre-Chauvet, Alain/L-9923-2015 OI Faivre-Chauvet, Alain/0000-0003-3849-0087 NR 35 TC 9 Z9 9 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0883-2897 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD AUG PY 1993 VL 20 IS 6 BP 755 EP 762 DI 10.1016/0969-8051(93)90162-N PG 8 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA LQ430 UT WOS:A1993LQ43000005 PM 8401376 ER PT J AU FAIVRECHAUVET, A GESTIN, JF MEASE, RC SAIMAUREL, C THEDREZ, P SLINKIN, M MEINKEN, GE SRIVASTAVA, SC CHATAL, JF AF FAIVRECHAUVET, A GESTIN, JF MEASE, RC SAIMAUREL, C THEDREZ, P SLINKIN, M MEINKEN, GE SRIVASTAVA, SC CHATAL, JF TI INTRODUCTION OF 5 POTENTIALLY METABOLIZABLE LINKING GROUPS BETWEEN IN-111 CYCLOHEXYL EDTA DERIVATIVES AND F(AB')2 FRAGMENTS OF ANTICARCINOEMBRYONIC ANTIGEN-ANTIBODY .2. COMPARATIVE PHARMACOKINETICS AND BIODISTRIBUTION IN HUMAN COLORECTAL CARCINOMA-BEARING NUDE-MICE SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article ID MONOCLONAL-ANTIBODY; RADIOIMMUNODETECTION; LINKAGES; CHELATE; TUMOR AB The five linker-containing immunoconjugates described in the preceding paper were labeled with In-111 and tested for their biodistribution, pharmacokinetics and immunoscintigraphic tumor-xenografted nude mice. The results were compared with DTPADA and CDTAMA for reference. Results showed that, for immunoscintigraphy, the derivatives in decreasing order of effectiveness were: aliphatic (tumor/liver > 4.5 and tumor/kidney > 6.5 at 96 h), thioether (tumor/liver > 3 and tumor/kidney > 1.2 at 24 h), ethylene glycol succinate (tumor/liver > 1.7 and tumor/kidney > 0.5 at 24 h) and disulfide (tumor/liver > 0.5 and tumor/kidney > 0.6 at 96 h). Pharmacokinetic results were complementary with those of the biodistribution studies and provide a basis for the study of in vivo metabolic mechanisms of linker-immunoconjugates. Indium-111-labeled linker-immunoconjugates appear promising for tumor imaging with better contrast than what is obtained with the use of the conventional In-111-DTPA dianhydride chelate. C1 INSERM,UNIT 211,F-44035 NANTES,FRANCE. BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973. RI GESTIN, Jean-Francois/M-1505-2015; Faivre-Chauvet, Alain/L-9923-2015 OI Faivre-Chauvet, Alain/0000-0003-3849-0087 NR 12 TC 17 Z9 17 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0883-2897 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD AUG PY 1993 VL 20 IS 6 BP 763 EP 771 DI 10.1016/0969-8051(93)90163-O PG 9 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA LQ430 UT WOS:A1993LQ43000006 PM 8401377 ER PT J AU PALAYOOR, ST HUMM, JL ATCHER, RW HINES, JJ MACKLIS, RM AF PALAYOOR, ST HUMM, JL ATCHER, RW HINES, JJ MACKLIS, RM TI G2M ARREST AND APOPTOSIS IN MURINE T-LYMPHOMA CELLS FOLLOWING EXPOSURE TO BI-212 ALPHA-PARTICLE IRRADIATION SO NUCLEAR MEDICINE AND BIOLOGY LA English DT Article ID NEUTRON-CAPTURE THERAPY; INDUCED DIVISION DELAY; MAMMALIAN-CELLS; RADIOIMMUNOTHERAPY; RADIOBIOLOGY AB Asynchronous exponentially growing EL4 murine T lymphoma cells were exposed either to high LET alpha-radiation from Bi-212-DTPA or to gamma-radiation from a Cs-137 source. Radiation-induced cell cycle perturbation was studied by flow cytometry. Alpha irradiation, like gamma, transiently arrested cells in the G2M phase in a dose-dependent manner. The maximum percentages of cells accumulated in G2M 18 h after alpha- and gamma-irradiation were comparable, though the dose-response relationships differed. The ''RBE'' value for G2M block for alpha- versus gamma-radiation was approx. 4. Electron microscopic studies of the cell samples where a large proportion of cells were arrested in G2M showed subcellular changes in nuclear membrane and the presence of morphologically apoptotic cells. Biochemical analysis of DNA from irradiated cells by agarose gel electrophoresis revealed more extensive DNA fragmentation for alpha- vs gamma-irradiation, even at relatively low total doses. We conclude that the high LET radiation is more efficient in inducing G2M block and apoptosis in EL4 lymphoma cells. The overall radiosensitivity of some high and low grade malignant lymphoma cells to radiation may correlate with these processes. The clinical implications of Bi-212-induced G2M delay may be particularly important for biologically targeted high LET radiopharmaceutical therapy. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. RP PALAYOOR, ST (reprint author), HARVARD UNIV,SCH MED,JOINT CTR RADIAT THERAPY,BOSTON,MA 02115, USA. FU NCI NIH HHS [CA 09078, R29 CA 49017, CA 50886] NR 33 TC 38 Z9 38 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0883-2897 J9 NUCL MED BIOL JI Nucl. Med. Biol. PD AUG PY 1993 VL 20 IS 6 BP 795 EP 805 DI 10.1016/0969-8051(93)90166-R PG 11 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA LQ430 UT WOS:A1993LQ43000009 PM 8401380 ER PT J AU HELTON, JC GARNER, JW MARIETTA, MG RECHARD, RP RUDEEN, DK SWIFT, PN AF HELTON, JC GARNER, JW MARIETTA, MG RECHARD, RP RUDEEN, DK SWIFT, PN TI UNCERTAINTY AND SENSITIVITY ANALYSIS RESULTS OBTAINED IN A PRELIMINARY PERFORMANCE ASSESSMENT FOR THE WASTE ISOLATION PILOT-PLANT SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB Uncertainty and sensitivity analysis results obtained in a preliminary performance assessment for the Waste Isolation Pilot Plant (WIPP) in southeastern New Mexico are presented. The most appropriate conceptual model for performance assessment at the WIPP is believed to include gas generation due to corrosion and microbial action in the repository and a dual-porosity (matrix and fracture porosity) representation for solute transport in the Culebra Dolomite Member of the Rustler Formation. Under these assumptions, complementary cumulative distribution functions (CCDFS) summarizing radionuclide releases to the accessible environment due to both cuttings removal and ground-water transport fall substantially below the release limits promulgated by the U.S. Environmental Protection Agency (EPA). This is the case even when the current estimates of the uncertainty in analysis inputs are included. Performance assessment results are dominated by cuttings removal. The releases to the accessible environment due to groundwater transport make very small contributions to the total release. The variability in the distribution of CCDFs that must be considered in comparisons with the EPA release limits is dominated by the rate constant in the Poisson model for drilling intrusions. The variability in releases to the accessible environment due to cuttings removal is dominated by drill bit diameter. For a single borehole, whether or not a release due to groundwater transport from the repository to the Culebra occurs is controlled by Salado halite permeability, with no releases for small values (i.e., <5 x 10(-21) m2). Further, releases that do reach the Culebra for larger values of halite permeability are small and usually do not reach the accessible environment. A potentially important scenario for the WIPP involves two or more boreholes through the same waste panel, of which at least one penetrates a pressurized brine pocket and at least one does not. For these scenarios, the uncertainty in release to the Culebra due to groundwater transport is dominated by borehole permeability, brine pocket pressure, and the solubilities for individual elements (i. e., americium, neptunium, plutonium, thorium, uranium). Once a release reaches the Culebra, matrix distribution coefficients for the individual elements are important, with releases to the Culebra often failing to reach the accessible environment over the 10 000-yr period specified in the EPA regulations. C1 SANDIA NATL LABS,WIPP PERFORMANCE ASSESSMENT DEPT 6342,ALBUQUERQUE,NM 87185. RI ming-jui, chang/F-9294-2015 NR 59 TC 36 Z9 36 U1 1 U2 3 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD AUG PY 1993 VL 114 IS 4 BP 286 EP 331 PG 46 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ419 UT WOS:A1993LQ41900002 ER PT J AU SPRIGGS, GD AF SPRIGGS, GD TI IN-PILE MEASUREMENT OF THE DECAY CONSTANTS AND RELATIVE ABUNDANCES OF DELAYED NEUTRONS SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB An in-pile experimental technique to measure the decay constants and the relative abundances of the delayed neutron groups applicable for a given reactor system is presented. The method is based on a least-squares-fitting technique that simultaneously fits a series of transients produced by small reactivity perturbations to a reactor operating initially at delayed critical. The function that is least-squares fit is the analytic solution (written in terms of an arbitrary number of delayed neutron groups) as obtained by the point reactor model for the reactor response following a step change in reactivity. The application of the method does not require any knowledge of the size of the reactivity perturbations, and the method is independent of the detector efficiency. The results are based solely on the measurable quantities of relative power, time, and one measurable root of the Inhour equation. RP SPRIGGS, GD (reprint author), LOS ALAMOS NATL LAB,POB 1663,MS F684,LOS ALAMOS,NM 87545, USA. NR 23 TC 19 Z9 19 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD AUG PY 1993 VL 114 IS 4 BP 342 EP 351 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ419 UT WOS:A1993LQ41900004 ER PT J AU SCHRACK, RA WASSON, OA LARSON, DC DICKENS, JK TODD, JH AF SCHRACK, RA WASSON, OA LARSON, DC DICKENS, JK TODD, JH TI A RELATIVE MEASUREMENT OF THE B-10(N,ALPHA-1-GAMMA)LI-7 CROSS-SECTION BETWEEN 0.2 AND 4.0 MEV SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID ABSOLUTE AB Relative cross-section measurements for the B-10(n, alpha1 gamma)Li-7 reaction were made using the Oak Ridge Electron Linear Accelerator Laboratory neutron source. The cross sections were measured by observing the 478-keV photon using an intrinsic germanium detector. The neutron flux was monitored with a high-efficiency plastic scintillator. Monte Carlo calculations were used to provide multiple-scattering and neutron-attenuation corrections to the data. The measured cross sections differ as much as 40% from the ENDF/B-VI evaluation for incident neutron energies greater than 1.5 MeV C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP SCHRACK, RA (reprint author), NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899, USA. NR 20 TC 7 Z9 7 U1 2 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD AUG PY 1993 VL 114 IS 4 BP 352 EP 362 PG 11 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ419 UT WOS:A1993LQ41900005 ER PT J AU PILLAY, KKS PICARD, RR HAFER, JF AF PILLAY, KKS PICARD, RR HAFER, JF TI UNITED-STATES SPENT-FUEL DISPOSAL STRATEGIES AND INTERNATIONAL SAFEGUARDS SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Letter RP PILLAY, KKS (reprint author), LOS ALAMOS NATL LAB,SAFEGUARDS SYST GRP,LOS ALAMOS,NM 87545, USA. NR 20 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD AUG PY 1993 VL 114 IS 4 BP 363 EP 371 PG 9 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ419 UT WOS:A1993LQ41900006 ER PT J AU ONESTO, AT ZWEIG, HR GIBBS, DC CARLSON, RD RODWELL, E KAKARALA, CR AF ONESTO, AT ZWEIG, HR GIBBS, DC CARLSON, RD RODWELL, E KAKARALA, CR TI THE CASE FOR ENDURANCE TESTING OF SODIUM-HEATED STEAM-GENERATORS SO NUCLEAR TECHNOLOGY LA English DT Article DE STEAM GENERATOR; ENDURANCE TESTING; RELIABILITY AB After operating pressurized water reactor (PWR) steam generators in U.S. nuclear plants during the past 33 Yr and plugging thousands of tubes and replacing numerous steam generators at immense costs, utility and steam generator designers are now confident that they can design, build, and operate PWR steam generators successfully. Deployment of liquid-metal fast breeder reactors (LMFBRs) will likely follow the same scenario if long-term testing is not performed and development completed prior to commercial deployment. A case is made for endurance testing of steam generators to be used in future LMFBRs. C1 ARGONNE NATL LAB,ARGONNE,IL 60439. ELECT POWER RES INST,PALO ALTO,CA 94303. BABCOCK & WILCOX CO,BARBERTON,OH 44203. RP ONESTO, AT (reprint author), ROCKWELL INT CORP,CTR ENERGY TECHNOL ENGN,ROCKETDYNE DIV,6633 CANOGA AVE,CANOGA PK,CA 91309, USA. NR 12 TC 1 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525 SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD AUG PY 1993 VL 103 IS 2 BP 168 EP 186 PG 19 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LQ542 UT WOS:A1993LQ54200003 ER PT J AU DESWINIARSKI, R BAKERS, FT SCOTT, A GLASHAUSSER, C JONES, KW AF DESWINIARSKI, R BAKERS, FT SCOTT, A GLASHAUSSER, C JONES, KW TI ELASTIC AND INELASTIC-SCATTERING OF 0.8 GEV POLARIZED PROTONS FROM O-18 SO NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS LA English DT Article ID PARITY STATES; ELECTROEXCITATION; NE-20; EXCITATION AB Differential cross-sections and analyzing powers have been measured for a number of states in the O-18(p, p') O-18 reaction at 800 MeV. The ground-state rotational band (0+, 0.0 MeV; 2+, 1.98 MeV; and 4+, 7.11 MeV) has been analyzed via a coupled-channels calculation based on the Dirac equation; the results are compared with previous results based on the Schrodinger equation. Data for the 0+, 2+, 4+ triplet around 3.7 MeV are generally poorly fitted with vibrational model calculations. Angular-momentum transfers are determined for a number of higher states up to 12.5 MeV. C1 UNIV J FOURIER, F-38026 GRENOBLE, FRANCE. UNIV GEORGIA, DEPT PHYS & ASTRON, ATHENS, GA 30602 USA. RUTGERS UNIV, DEPT PHYS & ASTRON, NEW BRUNSWICK, NJ 08903 USA. LOS ALAMOS NATL LAB, LAMPF, LOS ALAMOS, NM 87545 USA. RP DESWINIARSKI, R (reprint author), UNIV GRENOBLE 1, INST SCI NUCL, CNRS, IN2P3, F-38026 ST MARTIN DHERES, FRANCE. NR 31 TC 3 Z9 3 U1 0 U2 0 PU EDITRICE COMPOSITORI BOLOGNA PI BOLOGNA PA VIA STALINGRADO 97/2, I-40128 BOLOGNA, ITALY SN 1124-1861 J9 NUOVO CIMENTO A JI Nuovo Cimento Soc. Ital. Fis. A-Nucl. Part. Fields PD AUG PY 1993 VL 106 IS 8 BP 1119 EP 1132 PG 14 WC Physics, Particles & Fields SC Physics GA LZ189 UT WOS:A1993LZ18900011 ER PT J AU HEMKER, KJ MILLS, MJ AF HEMKER, KJ MILLS, MJ TI MEASUREMENTS OF ANTIPHASE BOUNDARY AND COMPLEX STACKING-FAULT ENERGIES IN BINARY AND B-DOPED NI3AL USING TEM SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID 110 SCREW DISLOCATIONS; LI-2 ORDERED ALLOYS; GRAIN-BOUNDARIES; L12 ALLOYS; SUPERLATTICE DISLOCATIONS; ELECTRON-MICROSCOPY; ROOM-TEMPERATURE; SINGLE-CRYSTALS; CORE STRUCTURE; YIELD STRESS AB The fourfold dissociation of superdislocations in Ni3Al has been recorded on images that were formed using second-order reflections, and the dissociation distances of the Shockley partial dislocations that bound a complex stacking fault (d(CSF)) have been measured. Comparisons with computer simulated (2g.5g) images highlight the presence of supplementary intensity peaks when d(CSF) is less than 3.0 nm. These simulations also indicate that the distance between the weaker pair of intensity peaks can be used to measure d(CSF) if the experimental observations are corrected for the image shift that occurs during the microscopy. Experimental observations confirm the presence of the supplementary peaks, and measured values of d(CSF) were found to be larger in binary Ni3Al than in the boron-modified alloy. These measured values have been corrected through comparison to image simulations, and the corresponding complex stacking fault and antiphase boundary energies have been calculated using anisotropic elasticity. The results of this study indicate that the antiphase boundary energies are approximately the same for the two alloys but that the complex stacking fault energy is higher in the boron-containing alloy than it is in the binary alloy. C1 SANDIA NATL LABS,DEPT MAT,LIVERMORE,CA 94551. RP HEMKER, KJ (reprint author), ECOLE POLYTECH FED LAUSANNE,INST GENIE ATOM,CH-1015 LAUSANNE,SWITZERLAND. RI Hemker, Kevin/A-3315-2010 NR 58 TC 74 Z9 74 U1 1 U2 14 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD AUG PY 1993 VL 68 IS 2 BP 305 EP 324 PG 20 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA LT076 UT WOS:A1993LT07600006 ER PT J AU VETRANO, JS ROBERTSON, IM KIRK, MA AF VETRANO, JS ROBERTSON, IM KIRK, MA TI EFFECT OF DILUTE SOLUTE ADDITIONS ON LOOP FORMATION FROM HEAVY-ION PRODUCED DISPLACEMENT CASCADES IN NI SO PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES LA English DT Article ID MOLECULAR-DYNAMICS; DISLOCATION LOOPS; MONTE-CARLO; TEMPERATURE; NICKEL; COPPER; CU3AU; SI; CU AB Transmission electron microscopy has been employed to study the formation of vacancy dislocation loops from defect cascades produced by 50 keV Kr+ ion irradiations of Ni and its dilute alloys with Si and Al. An unusual and reproducible dependence of loop collapse, probabilities and loop size distributions on solute content was found. The temperature dependence at 30 and 300 K and ion dose dependence of these loop collapse probabilities were measured. The results are explained by impurity-caused changes in both the collisional phase and thermal spike (molten zone) phase of the defect cascade. Specific mechanisms include disruption of focusons by impurities to change the energy density profile within the collison cascade, disruption of replacement collision sequences to place the self-interstitials closer to the molten zone, and interstitial trapping to reduce recombination during the thermal spike phase. C1 DEPT MAT SCI & ENGN,URBANA,IL 61801. ARGONNE NATL LAB,DIV MAT,ARGONNE,IL 60439. NR 55 TC 5 Z9 5 U1 0 U2 4 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0141-8610 J9 PHILOS MAG A JI Philos. Mag. A-Phys. Condens. Matter Struct. Defect Mech. Prop. PD AUG PY 1993 VL 68 IS 2 BP 381 EP 400 PG 20 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA LT076 UT WOS:A1993LT07600010 ER PT J AU FORTNER, J SABOUNGI, ML ENDERBY, JE AF FORTNER, J SABOUNGI, ML ENDERBY, JE TI ELECTRICAL-PROPERTIES OF AN UNUSUAL LIQUID SEMICONDUCTOR - K-TE SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article AB Thermopower and electrical conductivity measurements are reported for liquid KxTe1-x alloys. The results confirm a semiconducting behaviour of the liquid over a large range of compositions and temperatures, which is due to the presence of low-coordination structural units as confirmed by recent diffraction studies. Further insights into the controversial issue of Te bonding in the liquid state are inferred. The Kubo-Greenwood formalism is discussed to explain the observed electrical conductivity and thermopower. The temperature dependence of the conductivity is shown to obey the Meyer-Neldel (MN) rule. The data are not consistent with an explanation of the MN rule based on a statistical shift of the Fermi energy with temperature. C1 UNIV BRISTOL,HH WILLS PHYS LAB,BRISTOL BS8 1TL,AVON,ENGLAND. RP FORTNER, J (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. RI Saboungi, Marie-Louise/C-5920-2013 OI Saboungi, Marie-Louise/0000-0002-0607-4815 NR 17 TC 11 Z9 11 U1 0 U2 2 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD AUG PY 1993 VL 68 IS 2 BP 85 EP 91 DI 10.1080/09500839308240498 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA LR455 UT WOS:A1993LR45500007 ER EF