FN Thomson Reuters Web of Science™ VR 1.0 PT J AU DUPONT, BR FERTITTA, A OLSEN, AS MOORE, CM STRATTON, RF AF DUPONT, BR FERTITTA, A OLSEN, AS MOORE, CM STRATTON, RF TI DE-NOVO DUPLICATION 19P IDENTIFIED BY FLUORESCENT IN-SITU HYBRIDIZATION SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UNIV TEXAS,HLTH SCI CTR,SAN ANTONIO,TX 78284. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 543 EP 543 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33500543 ER PT J AU MEYNE, J GOODWIN, EH BAILEY, SM TENNYSON, RB MOYZIS, RK AF MEYNE, J GOODWIN, EH BAILEY, SM TENNYSON, RB MOYZIS, RK TI STRAND DIRECTION OF HUMAN REPETITIVE DNA-SEQUENCES DETERMINED BY STRAND-SPECIFIC FLUORESCENT IN-SITU HYBRIDIZATION SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 580 EP 580 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33500582 ER PT J AU JONG, MTC CAREY, AH STEWART, CL RINCHIK, EM GLENN, CC DRISCOLL, DJ NICHOLLS, RD AF JONG, MTC CAREY, AH STEWART, CL RINCHIK, EM GLENN, CC DRISCOLL, DJ NICHOLLS, RD TI THE ZNF127 GENE ENCODES A NOVEL C3HC4 ZINC-FINGER PROTEIN AND ITS EXPRESSION IS REGULATED BY GENOMIC IMPRINTING SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UNIV FLORIDA,GAINESVILLE,FL 32611. ROCHE INST MOLEC BIOL,NUTLEY,NJ 07110. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. NR 0 TC 2 Z9 2 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 697 EP 697 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33500697 ER PT J AU BATZER, MA ALEGRIAHARTMAN, M KASS, DH NOVICK, GE IOANNOU, PA HERRERA, RJ STONEKING, M DEININGER, PL AF BATZER, MA ALEGRIAHARTMAN, M KASS, DH NOVICK, GE IOANNOU, PA HERRERA, RJ STONEKING, M DEININGER, PL TI ALU REPEATS AS MARKERS FOR HUMAN-POPULATION GENETICS SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551. LOUISIANA STATE UNIV,MED CTR,DEPT BIOCHEM & MOLEC BIOL,NEW ORLEANS,LA 70112. FLORIDA INT UNIV,DEPT BIOL SCI,MIAMI,FL 33199. CYPRUS INST NEUROL & GENET,NICOSIA,CYPRUS. PENN STATE UNIV,DEPT ANTHROPOL,UNIV PK,PA 16802. NR 0 TC 0 Z9 0 U1 0 U2 2 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 778 EP 778 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33500776 ER PT J AU LIU, ZF MOHRENWEISER, H TAYLOR, E MEYERS, DA OLCKERS, A ISAACS, H FLETCHER, JE ROSENBERG, H LEVITT, RC AF LIU, ZF MOHRENWEISER, H TAYLOR, E MEYERS, DA OLCKERS, A ISAACS, H FLETCHER, JE ROSENBERG, H LEVITT, RC TI CHARACTERIZATION OF A HIGHLY POLYMORPHIC (GT)26 IN HORMONE-SENSITIVE LIPASE (LIPE) - EVALUATION AS A GENE CANDIDATE IN MALIGNANT HYPERTHERMIA SUSCEPTIBILITY (MHS) SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 JOHNS HOPKINS MED INST,BALTIMORE,MD 21205. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV PRETORIA,PRETORIA,SOUTH AFRICA. UNIV WITWATERSRAND,JOHANNESBURG 2001,SOUTH AFRICA. HAHNEMANN UNIV,PHILADELPHIA,PA 19102. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1037 EP 1037 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501037 ER PT J AU MITCHISON, HM ORAWE, AM THOMPSON, AD KNIGHT, M CALLEN, DF DOGGETT, NA GARDINER, RM MOLE, SE AF MITCHISON, HM ORAWE, AM THOMPSON, AD KNIGHT, M CALLEN, DF DOGGETT, NA GARDINER, RM MOLE, SE TI GENETIC-MAPPING OF THE BATTEN-DISEASE LOCUS (CLN3) TO THE INTERVAL D16S288-D16S383 BY ANALYSIS OF HAPLOTYPES AND ALLELIC ASSOCIATION SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UCL,SCH MED,DEPT PAEDIAT,LONDON,ENGLAND. WOMENS & CHILDRENS HOSP,CTR MED GENET,DEPT CUTOGENET & MOLEC GENET,ADELAIDE,AUSTRALIA. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87544. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87544. RI Callen, David/G-1975-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1047 EP 1047 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501045 ER PT J AU LAUBSCHER, KH GLEW, RH LEE, RE OKINAKA, RT AF LAUBSCHER, KH GLEW, RH LEE, RE OKINAKA, RT TI A NEW EXON 9 MUTATION IN GAUCHER DISEASE DETECTED BY DENATURING GRADIENT GEL-ELECTROPHORESIS SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV NEW MEXICO,ALBUQUERQUE,NM 87131. UNIV PITTSBURGH,PITTSBURGH,PA 15260. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1190 EP 1190 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501188 ER PT J AU LISHANSKAYA, AI RINE, JD AF LISHANSKAYA, AI RINE, JD TI USE OF A MISMATCH BINDING-PROTEIN, MUTS, FOR MUTATION DETECTION WITHIN THE CYSTIC-FIBROSIS GENE BY A BAND-SHIFT ASSAY SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,CTR HUMAN GENOME,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1196 EP 1196 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501194 ER PT J AU CHEN, DJ NGUYEN, T MARRONE, B ZHAO, Y SICILIANO, MJ AF CHEN, DJ NGUYEN, T MARRONE, B ZHAO, Y SICILIANO, MJ TI ASSIGNMENT OF A HUMAN DNA DOUBLE-STRAND BREAK REPAIR GENE, XRCC5 TO 2Q35 BY X-RAY HYBRIDS MAPPING SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. UNIV TEXAS,M D ANDERSON CANC CTR,DEPT MOLEC GENET,HOUSTON,TX 77030. RI Lujan Center, LANL/G-4896-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1277 EP 1277 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501279 ER PT J AU CHURCH, DM MCPHERSON, JD GRADY, D MOYZIS, R DEAVEN, L WASMUTH, JJ AF CHURCH, DM MCPHERSON, JD GRADY, D MOYZIS, R DEAVEN, L WASMUTH, JJ TI IDENTIFICATION OF EXPRESSED SEQUENCES FROM THE CRI DU CHAT REGION OF 5P SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UNIV CALIF IRVINE,IRVINE,CA 92717. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RI McPherson, John/D-2633-2017 OI McPherson, John/0000-0001-8049-9347 NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1278 EP 1278 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501277 ER PT J AU DOGGETT, NA MITCHISON, H MUNDT, MO CALLEN, DF TORNEY, DC DEAVEN, LL SUTHERLAND, GR MOLE, SA GARDINER, RM MOYZIS, RK AF DOGGETT, NA MITCHISON, H MUNDT, MO CALLEN, DF TORNEY, DC DEAVEN, LL SUTHERLAND, GR MOLE, SA GARDINER, RM MOYZIS, RK TI CONSTRUCTION OF COSMID, YAC, AND STS MAPS IN THE BATTEN-DISEASE REGION OF CHROMOSOME-16 SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 ADELAIDE CHILDRENS HOSP INC,ADELAIDE,SA,AUSTRALIA. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND. RI Sutherland, Grant/D-2606-2012; Callen, David/G-1975-2012 NR 0 TC 3 Z9 3 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1285 EP 1285 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501286 ER PT J AU LONGMIRE, JL WU, JR BROWN, NC HILDEBRAND, CE DEAVEN, LL MOYZIS, RK RATLIFF, RL BAKER, RJ AF LONGMIRE, JL WU, JR BROWN, NC HILDEBRAND, CE DEAVEN, LL MOYZIS, RK RATLIFF, RL BAKER, RJ TI ORGANIZATION OF REPETITIVE DNA-SEQUENCES ON HUMAN CHROMOSOME-16 SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87544. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87544. TEXAS TECH UNIV,DEPT BIOL SCI,LUBBOCK,TX 79409. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1325 EP 1325 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501327 ER PT J AU MCCORMICK, MK NARANJO, C CHURCH, D CAMPBELL, E MARRONE, B DEAVEN, L MOYZIS, R BUCKLER, A AF MCCORMICK, MK NARANJO, C CHURCH, D CAMPBELL, E MARRONE, B DEAVEN, L MOYZIS, R BUCKLER, A TI IDENTIFICATION OF EXPRESSED SEQUENCES ON HUMAN CHROMOSOME-21 SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 MASSACHUSETTS GEN HOSP,MOLEC NEUROGENET UNIT,BOSTON,MA 02114. HARVARD UNIV,SCH MED,DEPT GENET,BOSTON,MA 02115. LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87544. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87544. UNIV CALIF IRVINE,DEPT BIOCHEM,IRVINE,CA 92717. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1327 EP 1327 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501328 ER PT J AU PHILLIPS, RL ROGAN, PK CULIAT, CT STUBBS, L RINCHIK, EM GOTTLIEB, W NICHOLLS, RD AF PHILLIPS, RL ROGAN, PK CULIAT, CT STUBBS, L RINCHIK, EM GOTTLIEB, W NICHOLLS, RD TI A YAC CONTIG SPANNING 4 GENES IN DISTAL HUMAN CHROMOSOME-15Q11-Q13, MAPPING OF THE HUMAN GABRG3 GENE, AND EFFECT OF HOMOZYGOUS DELETION OF 3 GABA-A RECEPTOR GENES IN MOUSE SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UNIV FLORIDA,GAINESVILLE,FL 32611. PENN STATE UNIV,MILTON S HERSHEY MED CTR,HERSHEY,PA 17033. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106. NR 0 TC 5 Z9 5 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1345 EP 1345 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501346 ER PT J AU RIESS, O SIEDLACZCK, I EPPLEN, JT DEAVEN, L AF RIESS, O SIEDLACZCK, I EPPLEN, JT DEAVEN, L TI CHARACTERIZATION OF A FLOW-SORTED HUMAN CHROMOSOME-4 COSMID LIBRARY SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 RUHR UNIV BOCHUM,DEPT MOLEC HUMAN GENET,W-4630 BOCHUM,GERMANY. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1349 EP 1349 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501351 ER PT J AU SCHUTTE, BC MATHEWS, KD FEDDERSEN, JA BAILEY, HL WINOKUR, ST WEIFFENBACH, B ALTHERR, MR AF SCHUTTE, BC MATHEWS, KD FEDDERSEN, JA BAILEY, HL WINOKUR, ST WEIFFENBACH, B ALTHERR, MR TI IDENTIFICATION OF A HETEROCHROMATIN-ASSOCIATED REPETITIVE ELEMENT THAT MAPS NEAR THE FACIOSCAPULOHUMERAL DYSTROPHY LOCUS SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UNIV IOWA,IOWA CITY,IA 52242. LANL,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM. COLLABORAT RES INC,WALTHAM,MA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1357 EP 1357 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501358 ER PT J AU WEIFFENBACH, B SCHUTTE, B DUBOIS, J MANNING, S MA, N JACOBSEN, SJ TAWIL, R GRIGGS, RC ALTHERR, M AF WEIFFENBACH, B SCHUTTE, B DUBOIS, J MANNING, S MA, N JACOBSEN, SJ TAWIL, R GRIGGS, RC ALTHERR, M TI ISOLATION AND MAPPING OF REARRANGEMENTS ASSOCIATED WITH FACIOSCAPULOHUMERAL MUSCULAR-DYSTROPHY (FSHD) SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 COLLABORAT RES INC,WALTHAM,MA. UNIV IOWA,IOWA CITY,IA 52242. UNIV CALIF SAN DIEGO,SAN DIEGO,CA 92103. UNIV ROCHESTER,ROCHESTER,NY 14627. LANL,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM. NR 1 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1370 EP 1370 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501368 ER PT J AU WINOKUR, ST BENGTSSON, U MARKOVICH, R WASMUTH, JJ ALTHERR, MR AF WINOKUR, ST BENGTSSON, U MARKOVICH, R WASMUTH, JJ ALTHERR, MR TI MILDLY REPETITIVE SEQUENCES CLOSELY LINKED TO THE FACIOSCAPULOHUMERAL MUSCULAR-DYSTROPHY GENE ON DISTAL CHROMOSOME-4Q CROSS-HYBRIDIZE TO REGIONS OF HETEROCHROMATIN SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UNIV CALIF IRVINE,IRVINE,CA 92717. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1371 EP 1371 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501371 ER PT J AU XIE, YG HAN, FY RUTTLEDGE, MH FRANSSON, I PEYRARD, M DUNHAM, I COLLINS, J DEJONG, P NORDENSKJOLD, M DUMANSKI, JP AF XIE, YG HAN, FY RUTTLEDGE, MH FRANSSON, I PEYRARD, M DUNHAM, I COLLINS, J DEJONG, P NORDENSKJOLD, M DUMANSKI, JP TI CONSTRUCTION OF YAC AND COSMID CONTIG IN THE NEUROFIBROMATOSIS TYPE-2 (NF2) AND MENINGIOMA REGION ON CHROMOSOME-22Q12 SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 KAROLINSKA HOSP,DEPT CLIN GENET,S-10401 STOCKHOLM 60,SWEDEN. KAROLINSKA HOSP,LUDWIG INST CANC RES,STOCKHOLM BRANCH,S-10401 STOCKHOLM 60,SWEDEN. GUYS HOSP,PAEDIAT RES UNIT,LONDON SE1 9RT,ENGLAND. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1375 EP 1375 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501376 ER PT J AU LUCAS, JN HILL, F SWANSBURY, G CLUTTERBUCK, R STRAUME, T AF LUCAS, JN HILL, F SWANSBURY, G CLUTTERBUCK, R STRAUME, T TI NON-CANCER-RELATED GENETIC-DAMAGE MEASURED IN A LEUKEMIA PATIENT SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. ROYAL MARSDEN HOSP,LONDON,ENGLAND. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1526 EP 1526 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501526 ER PT J AU GIORGI, D ROUQUIER, S KELLY, R LOWE, J LENNON, G AF GIORGI, D ROUQUIER, S KELLY, R LOWE, J LENNON, G TI ISOLATION AND MAPPING OF THE ALPHA(1,2) FUCOSYL-TRANSFERASE (FUT1, FUT2) GENES FROM HUMAN CHROMOSOME-19 SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME L452,LIVERMORE,CA 94550. UNIV MICHIGAN,SCH MED,HHMI,ANN ARBOR,MI 48109. NR 0 TC 0 Z9 0 U1 0 U2 1 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1777 EP 1777 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501778 ER PT J AU WEIER, HU SCHERTHAN, H GRAY, JW AF WEIER, HU SCHERTHAN, H GRAY, JW TI CHROMOSOME-SPECIFIC ORGANIZATION OF HUMAN LONG INTERSPERSED REPEAT ELEMENTS [LINES] SO AMERICAN JOURNAL OF HUMAN GENETICS LA English DT Meeting Abstract C1 UNIV CALIF SAN FRANCISCO,SCH MED,DIV MOLEC CYTOMETRY,SAN FRANCISCO,CA 94143. LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. UNIV KAISERSLAUTERN,DEPT HUMAN BIOL,W-6750 KAISERSLAUTERN,GERMANY. NR 0 TC 0 Z9 0 U1 0 U2 0 PU UNIV CHICAGO PRESS PI CHICAGO PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637 SN 0002-9297 J9 AM J HUM GENET JI Am. J. Hum. Genet. PD SEP PY 1993 VL 53 IS 3 SU S BP 1793 EP 1793 PG 1 WC Genetics & Heredity SC Genetics & Heredity GA LW335 UT WOS:A1993LW33501795 ER PT J AU GODWIN, RP AF GODWIN, RP TI THE HYDRAULIC JUMP (SHOCKS AND VISCOUS-FLOW IN THE KITCHEN SINK) SO AMERICAN JOURNAL OF PHYSICS LA English DT Article AB The radial location and flow discontinuity of the hydraulic jump in a sink are discussed. The importance of viscosity in determining the location of the jump is emphasized. A model, which highlights the importance of viscous flow near the sink surface, allows us to predict the jump radius and the flow depth on the upstream and downstream sides of the jump as functions of viscosity, gravity, and flow velocity. In our approximate treatment, the jump location is independent of gravity and inversely proportional to the cube root of the viscosity. RP GODWIN, RP (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA. NR 19 TC 18 Z9 18 U1 2 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0002-9505 J9 AM J PHYS JI Am. J. Phys. PD SEP PY 1993 VL 61 IS 9 BP 829 EP 832 DI 10.1119/1.17413 PG 4 WC Education, Scientific Disciplines; Physics, Multidisciplinary SC Education & Educational Research; Physics GA LV449 UT WOS:A1993LV44900014 ER PT J AU MCCANN, MP CHEN, CH AF MCCANN, MP CHEN, CH TI ULTRASENSITIVE ANALYSIS OF GASES USING LASER SPECTROSCOPY SO AMERICAN LABORATORY LA English DT Article ID IONIZATION MASS-SPECTROMETRY C1 OAK RIDGE NATL LAB,PHOTOPHYS GRP,OAK RIDGE,TN 37831. RP MCCANN, MP (reprint author), UNIV CENT FLORIDA,DEPT CHEM,ORLANDO,FL 32816, USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU INT SCIENTIFIC COMMUN INC PI SHELTON PA PO BOX 870, 30 CONTROLS DRIVE, SHELTON, CT 06484-0870 SN 0044-7749 J9 AM LAB JI Am. Lab. PD SEP PY 1993 VL 25 IS 14 BP 46 EP & PG 0 WC Chemistry, Analytical; Instruments & Instrumentation SC Chemistry; Instruments & Instrumentation GA LY091 UT WOS:A1993LY09100009 ER PT J AU LERNER, JM LU, T ANGEL, M KYLE, K AF LERNER, JM LU, T ANGEL, M KYLE, K TI ENHANCING MINIMUM DETECTION LEVELS OF CHLORINATED HYDROCARBONS - AN APPLICATION OF NEURAL-NET-ASSISTED SPECTROSCOPY SO AMERICAN LABORATORY LA English DT Article C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP LERNER, JM (reprint author), PHYS OPT CORP,20600 GRAMERCY PL,TORRANCE,CA 90501, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU INT SCIENTIFIC COMMUN INC PI SHELTON PA PO BOX 870, 30 CONTROLS DRIVE, SHELTON, CT 06484-0870 SN 0044-7749 J9 AM LAB JI Am. Lab. PD SEP PY 1993 VL 25 IS 14 BP C36 EP & PG 0 WC Chemistry, Analytical; Instruments & Instrumentation SC Chemistry; Instruments & Instrumentation GA LY091 UT WOS:A1993LY09100006 ER PT J AU BISH, DL POST, JE AF BISH, DL POST, JE TI QUANTITATIVE MINERALOGICAL ANALYSIS USING THE RIETVELD FULL-PATTERN FITTING METHOD SO AMERICAN MINERALOGIST LA English DT Article ID POWDER DIFFRACTION PATTERNS; CRYSTAL-STRUCTURES; PHASE-ANALYSIS; REFINEMENT; MIXTURES AB Quantitative phase analysis of a number of multicomponent standard and natural mineral mixtures has been done using an adaptation of the Rietveld method. Binary mixtures (most 50:50 by weight) of corundum with quartz, hematite, ilmenite, magnetite, biotite, analcime, mordenite, or clinoptilolite were analyzed, using digital powder X-ray diffraction (XRD) data. In addition, a suite of standard mixtures of hematite and corundum, a natural feldspar mixture, the G-1 standard granite, two natural bauxite samples, and a mixture of biogenic carbonate minerals were also analyzed. Quantitative information was extracted from refined individual scale factors and unit-cell volumes (derived from refined unit-cell parameters), obtained with a Rietveld refinement program modified to analyze up to ten phases. The quantitative results for standard mixtures were within 2.5% (absolute) of the true values, with the exception of the hematite, ilmenite, and magnetite mixtures. Results for the latter mixtures using CuKalpha data were severely affected by microabsorption, but analysis of the hematite mixtures using FeKalpha radiation gave results with absolute errors less-than-or-equal-to 2%. Results for the G-1 granite and the natural feldspar agreed well with optically determined modes, and the method facilitated separation of the significant overlaps in the pattern of the carbonate minerals. Quantitative mineralogical analysis by the Rietveld method has several significant advantages over conventional methods of quantitative analysis. The method uses all intensity data in a pattern rather than a few of the most intense reflections, partially compensating for preferred orientation and extinction. In addition, standard data are calculated for each phase during analysis, overcoming the troublesome requirement of obtaining standards representative of the materials in an unknown. It is also possible to pin a wealth of information from each sample in addition to amounts of phases. Because some of the most troublesome systematic errors, including sample displacement and zero-point shift, can be refined, the method yields unit-cell parameters of an accuracy comparable with that obtained when using an internal d-value standard. The method should find a wide application in geology, including in modal analysis and compositional determinations of individual mineral components using unit-cell parameter systematics. C1 SMITHSONIAN INST,DEPT MINERAL SCI,WASHINGTON,DC 20560. RP BISH, DL (reprint author), LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,LOS ALAMOS,NM 87545, USA. NR 30 TC 214 Z9 218 U1 4 U2 51 PU MINERALOGICAL SOC AMER PI WASHINGTON PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036 SN 0003-004X J9 AM MINERAL JI Am. Miner. PD SEP-OCT PY 1993 VL 78 IS 9-10 BP 932 EP 940 PG 9 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA MC300 UT WOS:A1993MC30000007 ER PT J AU DOKTYCZ, MJ AF DOKTYCZ, MJ TI DISCONTINUOUS ELECTROPHORESIS OF DNA - ADJUSTING DNA MOBILITY BY TRAILING ION NET MOBILITY SO ANALYTICAL BIOCHEMISTRY LA English DT Article ID MULTIPHASIC ZONE ELECTROPHORESIS; GEL ELECTROPHORESIS; BUFFER SYSTEMS; POLYACRYLAMIDE; AMPLIFICATION; RESOLUTION; FRAGMENTS RP DOKTYCZ, MJ (reprint author), OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831, USA. RI Doktycz, Mitchel/A-7499-2011 OI Doktycz, Mitchel/0000-0003-4856-8343 NR 19 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 0003-2697 J9 ANAL BIOCHEM JI Anal. Biochem. PD SEP PY 1993 VL 213 IS 2 BP 400 EP 406 DI 10.1006/abio.1993.1438 PG 7 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Analytical SC Biochemistry & Molecular Biology; Chemistry GA LV309 UT WOS:A1993LV30900032 PM 8238917 ER PT J AU LUCKE, RB CAMPBELL, JA ROSS, GA GOHEEN, SC HOPPE, EW AF LUCKE, RB CAMPBELL, JA ROSS, GA GOHEEN, SC HOPPE, EW TI CLOSED-SYSTEM, SOLID-PHASE EXTRACTION CLEANUP METHOD FOR REMOVAL OF NORMAL PARAFFIN HYDROCARBON FROM SAMPLES PRIOR TO PURGE-AND-TRAP VOLATILE ANALYSIS SO ANALYTICAL CHEMISTRY LA English DT Article ID ORGANICS AB A novel approach has been developed to separate potential semivolatile interferences from volatile analytes prior to purge-and-trap analysis. This technique involves a closed system with solid-phase extraction which provides a simple, inexpensive method with minimal loss of volatile components. In addition, the separation method minimizes the potential adsorption of unwanted volatile species from the surrounding air during the cleanup procedure and reduces the radioactive level in actual tank waste samples. This cleanup method has been applied to radioactive, hazardous mixed waste samples containing normal paraffin hydrocarbon (NPH) from a Hanford single-shell tank. NPH, present at the percent level in actual tank wastes either as a native component or introduced as a hydrostatic fluid, interferes with the purge-and-trap gas chromatography/mass spectrometry (GC/MS) analysis of volatile components. Validation of the procedure was performed by analyzing blank spikes and actual, spiked single-shell tank waste samples. The NPH removal from actual waste samples and blank samples was better than 99%. This methodology could be easily extended to a sample matrix, such as water, sorbents, or soils, that contains excessive quantities of normal paraffin hydrocarbons. C1 PACIFIC NW LAB, BOX 999, RICHLAND, WA 99352 USA. NR 9 TC 8 Z9 8 U1 2 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 1 PY 1993 VL 65 IS 17 BP 2229 EP 2235 DI 10.1021/ac00065a011 PG 7 WC Chemistry, Analytical SC Chemistry GA LU634 UT WOS:A1993LU63400014 ER PT J AU WANG, J ANGNES, L TOBIAS, H ROESNER, RA HONG, KC GLASS, RS KONG, FM PEKALA, RW AF WANG, J ANGNES, L TOBIAS, H ROESNER, RA HONG, KC GLASS, RS KONG, FM PEKALA, RW TI CARBON AEROGEL COMPOSITE ELECTRODES SO ANALYTICAL CHEMISTRY LA English DT Article AB The electrochemical behavior and analytical performance of new vitreous carbon aerogel composite electrodes are described. These new composite electrodes rely on the unique open-cell nanostructure of aerogel materials, including their interconnected porosity, ultrafine pore sizes (<50 nm), and huge surface area. Transmission and scanning electron microscopies are used to shed useful insights into the carbon network. The enhanced diffusional flux results in a sigmoidal voltammetric response and nonlinear i vs t-1/2 chronoamperometric plots. The potential window is broad, and the background currents are low. Square-wave anodic stripping voltammetry at the mercury-coated carbon aerogel composite electrode is demonstrated for the quantitation of trace metals at the microgram per liter level using short deposition periods. These carbon aerogels and other aerogels present new opportunities for a wide range of electrode materials. C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA. RP WANG, J (reprint author), NEW MEXICO STATE UNIV, DEPT CHEM & BIOCHEM, LAS CRUCES, NM 88003 USA. RI Institute of Chemistry - USP, Dept. of Chemistry/B-8988-2012; Wang, Joseph/C-6175-2011 NR 15 TC 53 Z9 58 U1 4 U2 16 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 1 PY 1993 VL 65 IS 17 BP 2300 EP 2303 DI 10.1021/ac00065a022 PG 4 WC Chemistry, Analytical SC Chemistry GA LU634 UT WOS:A1993LU63400025 ER PT J AU BARNES, MD NG, KC WHITTEN, WB RAMSEY, JM AF BARNES, MD NG, KC WHITTEN, WB RAMSEY, JM TI DETECTION OF SINGLE RHODAMINE-6G MOLECULES IN LEVITATED MICRODROPLETS SO ANALYTICAL CHEMISTRY LA English DT Article ID LASER-INDUCED FLUORESCENCE; HYDRODYNAMICALLY FOCUSED FLOWS; LIGHT-SCATTERING; PHYCOERYTHRIN; EXCITATION AB Single Rhodamine 6G (R6G) molecules in levitated glycerol microdroplets have been detected with signal-to-noise ratios of >40 using CW laser-induced fluorescence. The fluorescence signal from single R6G molecules was identified by the magnitude of the fluorescence signal and by the unique time dependence of the fluorescence count rate before photobleaching. This high sensitivity allows single molecules to be counted by use of a digital detection approach offering significantly lower detection limits than those possible with conventional detection methods. C1 OAK RIDGE NATL LAB,DIV ANALYT CHEM,MAIL STOP 6142,OAK RIDGE,TN 37831. NR 26 TC 136 Z9 137 U1 3 U2 15 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 1 PY 1993 VL 65 IS 17 BP 2360 EP 2365 DI 10.1021/ac00065a032 PG 6 WC Chemistry, Analytical SC Chemistry GA LU634 UT WOS:A1993LU63400035 ER PT J AU WILKE, RJ WALLACE, DWR JOHNSON, KM AF WILKE, RJ WALLACE, DWR JOHNSON, KM TI WATER-BASED, GRAVIMETRIC METHOD FOR THE DETERMINATION OF GAS SAMPLE LOOP VOLUME SO ANALYTICAL CHEMISTRY LA English DT Note ID MARINE RP WILKE, RJ (reprint author), BROOKHAVEN NATL LAB,DIV OCEANOG & ATMOSPHER SCI,UPTON,NY 11973, USA. NR 7 TC 9 Z9 9 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0003-2700 J9 ANAL CHEM JI Anal. Chem. PD SEP 1 PY 1993 VL 65 IS 17 BP 2403 EP 2406 DI 10.1021/ac00065a039 PG 4 WC Chemistry, Analytical SC Chemistry GA LU634 UT WOS:A1993LU63400042 ER PT J AU GRUBER, AD MATTHEWS, S GRUBER, RP AF GRUBER, AD MATTHEWS, S GRUBER, RP TI ATTEMPTED IMPROVEMENT IN MAMMOGRAPHY BY INDUCING A PHASE-TRANSITION IN SILICONE GEL SO ANNALS OF PLASTIC SURGERY LA English DT Note AB An attempt was made to achieve a temporary alteration of the molecular structure (a ''phase transition'') of silicone gel, the end result of which would be to improve mammography. It was hoped that a phase transition of this type would result in either a reduction in gel volume or increased radiopenetration. Unfortunately, an electrically induced phase transition of silicone gel was not seen. In fact, a temporarily altered molecular orientation (phase transition) was not even possible under the extremes of voltage confirming the fact that silicone is extremely inert. C1 STANFORD UNIV,OAKLAND,CA. MIT,CAMBRIDGE,MA 02139. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. NR 5 TC 0 Z9 0 U1 0 U2 0 PU LITTLE BROWN CO PI BOSTON PA 34 BEACON STREET, BOSTON, MA 02108-1493 SN 0148-7043 J9 ANN PLAS SURG JI Ann. Plast. Surg. PD SEP PY 1993 VL 31 IS 3 BP 283 EP 285 DI 10.1097/00000637-199309000-00016 PG 3 WC Surgery SC Surgery GA LW370 UT WOS:A1993LW37000016 PM 8239423 ER PT J AU SELIFONOVA, O BURLAGE, R BARKAY, T AF SELIFONOVA, O BURLAGE, R BARKAY, T TI BIOLUMINESCENT SENSORS FOR DETECTION OF BIOAVAILABLE HG(II) IN THE ENVIRONMENT SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY LA English DT Article ID MERCURY RESISTANCE OPERON; TN21 MER OPERON; CLONED FRAGMENTS; ESCHERICHIA-COLI; GENETIC-ANALYSIS; EXPRESSION; PROMOTER; BACTERIA; BINDING; METHYLMERCURY AB Biosensors for the detection of pollutants in the environment can complement analytical methods by distinguishing bioavailable from inert, unavailable forms of contaminants. By using fusions of the well-understood Tn21 mercury resistance operon (mer) with promoterless luxCDABE from Vibrio fischeri, we have constructed and tested three biosensors for Hg(II). Bioluminescence specified by pRB28, carrying merRo/pT', by pOS14, mediating active transport of Hg(II), and by pOS15, containing an intact mer operon, was measured in rich and minimal media. The highest sensitivities were achieved in minimal medium and were 1, 0.5, and 25 nM Hg(II) for pRB28, pOS14, and pOS15, respectively. The utility of the biosensors in natural waters was demonstrated with freshwater, rain, and estuarine samples supplemented with Hg(II). mer-lux carried by pRB28 and pOS14 responded to Hg(II) in mercury-contaminated water samples collected from a freshwater pond. Semiquantitative analyses based on light emission in samples collected from the inlet (analytically determined total mercury, approximately 20 nM) and outlet (total mercury, approximately 7 nM) of the pond showed bioavailable mercury at approximately 20 and 1 to 2 nM, respectively. Thus, the biosensors described here semiquantitatively detect bioavailable inorganic mercury (at a nanomolar to micromolar concentration range) in contaminated waters. C1 US EPA,ENVIRONM RES LAB,GULF BREEZE,FL 32561. UNIV W FLORIDA,CTR ENVIRONM DIAGNOST & BIOREMEDIAT,PENSACOLA,FL 32514. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. NR 46 TC 234 Z9 242 U1 2 U2 13 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 SEP PY 1993 VL 59 IS 9 BP 3083 EP 3090 PG 8 WC Biotechnology & Applied Microbiology; Microbiology SC Biotechnology & Applied Microbiology; Microbiology GA LW040 UT WOS:A1993LW04000048 PM 8215378 ER PT J AU LENHART, S PROTOPOPESCU, V STOJANOVIC, S AF LENHART, S PROTOPOPESCU, V STOJANOVIC, S TI A MINIMAX PROBLEM FOR SEMILINEAR NONLOCAL COMPETITIVE-SYSTEMS SO APPLIED MATHEMATICS AND OPTIMIZATION LA English DT Article DE ELLIPTIC SYSTEMS; NONLINEAR COMPETITIVE INTERACTIONS; GAME THEORY; OPTIMAL CONTROL ID OPTIMAL DAMPING CONTROL; PARABOLIC-SYSTEMS AB A two-sided game for the control of a stationary semilinear competitive system with autonomous sources is considered, where the controls are the kernels of the nonlocal interaction terms. The saddle point (the optimal solution of the game) is characterized as the unique solution of the associated optimality system, which is solved by an iterative scheme. C1 OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,OAK RIDGE,TN 37831. UNIV CINCINNATI,DEPT MATH SCI,CINCINNATI,OH 45221. RP LENHART, S (reprint author), UNIV TENNESSEE,DEPT MATH,KNOXVILLE,TN 37996, USA. NR 13 TC 9 Z9 9 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0095-4616 J9 APPL MATH OPT JI Appl. Math. Optim. PD SEP PY 1993 VL 28 IS 2 BP 113 EP 132 DI 10.1007/BF01182976 PG 20 WC Mathematics, Applied SC Mathematics GA LN539 UT WOS:A1993LN53900001 ER PT J AU SWEATT, WC AF SWEATT, WC TI NONWALK-OFF MULTIPASS TWYMAN-GREEN INTERFEROMETER SO APPLIED OPTICS LA English DT Article AB A modification of the multipass Twyman-Green interferometer is suggested that avoids the walk-off problem. Also, a data reduction scheme has been developed that permits most of the aberrations of the ancillary optics to be separated from those of the test piece. RP SWEATT, WC (reprint author), SANDIA NATL LABS, DIV PHOTOMETR & OPT DEV, POB 5800, ALBUQUERQUE, NM 87185 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD SEP 1 PY 1993 VL 32 IS 25 BP 4751 EP 4754 PG 4 WC Optics SC Optics GA LU727 UT WOS:A1993LU72700010 PM 20830141 ER PT J AU BARBEE, TW RIFE, JC HUNTER, WR KOWALSKI, MP CRUDDACE, RG SEELY, JF AF BARBEE, TW RIFE, JC HUNTER, WR KOWALSKI, MP CRUDDACE, RG SEELY, JF TI LONG-TERM STABILITY OF A MO/SI MULTILAYER STRUCTURE SO APPLIED OPTICS LA English DT Article DE MULTILAYERS; THIN-FILM INTERFERENCE COATINGS; EXTREME ULTRAVIOLET ID GRATING-CRYSTAL MONOCHROMATOR; PERFORMANCE AB The normal-incidence reflectance of a Mo/Si multilayer mirror, with peak reflectance near 130 angstrom, was measured over a period of 20 months by using synchrotron radiation. The measured reflectances were unchanged over this period of time, and this indicates that the material layers and interfaces were stable. C1 USN, RES LAB, WASHINGTON, DC 20375 USA. SPA INC, LANDOVER, MD 20785 USA. RP BARBEE, TW (reprint author), LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. NR 6 TC 27 Z9 27 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD SEP 1 PY 1993 VL 32 IS 25 BP 4852 EP 4854 PG 3 WC Optics SC Optics GA LU727 UT WOS:A1993LU72700026 PM 20830157 ER PT J AU SEELY, JF KOWALSKI, MP HUNTER, WR RIFE, JC BARBEE, TW HOLLAND, GE BOYER, CN BROWN, CM AF SEELY, JF KOWALSKI, MP HUNTER, WR RIFE, JC BARBEE, TW HOLLAND, GE BOYER, CN BROWN, CM TI ON-BLAZE OPERATION OF A MO/SI MULTILAYER-COATED, CONCAVE DIFFRACTION GRATING IN THE 136-142-(A)CAP WAVELENGTH REGION AND NEAR NORMAL INCIDENCE SO APPLIED OPTICS LA English DT Article DE DIFFRACTION GRATING; MULTILAYER COATING; EXTREME ULTRAVIOLET ID EXTREME-ULTRAVIOLET; PERFORMANCE; MONOCHROMATOR AB The efficiency and resolving power of a concave, 2400-groove/mm, blazed diffraction grating that had a Mo/Si multilayer coating were determined. The multilayer coating had a peak reflectance of 55% at 140-angstrom near normal incidence. The efficiency of the multilayer grating for wavelengths in the 136-139-angstrom range was 2% near normal incidence. This efficiency was a factor of 150 greater than the efficiency of a sister replica Au-coated grating in the same wavelength region. The resolving power of the multilayer-coated grating in the third order of a V VIII transition with a first-order wavelength of 140.451 angstrom was 9100. Comparisons with the Au-coated grating indicated that the application of the multilayer coating did not affect the resolving power or the blaze angle. C1 UNIV SPACE RES ASSOC, WASHINGTON, DC 20024 USA. LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA. SFA INC, LANDOVER, MD 20785 USA. RP SEELY, JF (reprint author), USN, RES LAB, WASHINGTON, DC 20375 USA. NR 15 TC 30 Z9 30 U1 0 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0003-6935 J9 APPL OPTICS JI Appl. Optics PD SEP 1 PY 1993 VL 32 IS 25 BP 4890 EP 4897 PG 8 WC Optics SC Optics GA LU727 UT WOS:A1993LU72700033 PM 20830164 ER PT J AU TAYLOR, BE DEBIASE, AE MAHONEY, DL AF TAYLOR, BE DEBIASE, AE MAHONEY, DL TI DEVELOPMENT OF THE ZOOPLANKTON ASSEMBLAGE IN A NEW COOLING RESERVOIR SO ARCHIV FUR HYDROBIOLOGIE LA English DT Article ID TROPHIC STATE RELATIONSHIPS; FRESH-WATER ZOOPLANKTON; CRUSTACEAN ZOOPLANKTON; PLANKTONIC ROTIFERS; THREADFIN SHAD; FLORIDA LAKES; GIZZARD SHAD; COMMUNITY; PREDATION; IMPACT AB We document changes in the developing zooplankton assemblage of a new cooling reservoir in the southeastern United States. Our 3-year study began nine months after the reservoir filled. The reservoir received thermal effluent from a nuclear reactor during cooler months of the first two years of the study. The effluent increased water temperatures by 10 - 15-degrees-C and sharply reduced zooplankton populations, mainly rotifers, at the upper end of the reservoir. At the lower end, the thermal effluent increased temperatures by 3 - 5-degrees-C, but had little detectable effect on the zooplankton. Crustacean zooplankton initially dominated the assemblage at the lower end of the reservoir. A year before reactor operation ceased entirely, their abundances began to decline as populations of threadfin shad (Dorosoma petenense) and other pelagic planktivorous fish increased. We infer that fish predation caused the decline of the crustaceans. Fish predation may indirectly have allowed the rotifer populations to increase by suppressing invertebrate predation or by reducing competition from crustacean grazers for algal food resources. RP TAYLOR, BE (reprint author), SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29802, USA. NR 44 TC 9 Z9 10 U1 0 U2 0 PU E SCHWEIZERBART'SCHE VERLAGS PI STUTTGART PA NAEGELE U OBERMILLER JOHANNESSTRASSE 3A, D 70176 STUTTGART, GERMANY SN 0003-9136 J9 ARCH HYDROBIOL JI Arch. Hydrobiol. PD SEP PY 1993 VL 128 IS 2 BP 129 EP 148 PG 20 WC Limnology; Marine & Freshwater Biology SC Marine & Freshwater Biology GA ME350 UT WOS:A1993ME35000001 ER PT J AU GOREVIC, PD DATTWYLER, RJ DUNN, JJ JIANG, W GORGONE, G LUFT, BJ AF GOREVIC, PD DATTWYLER, RJ DUNN, JJ JIANG, W GORGONE, G LUFT, BJ TI EPITOPE MAPPING OF OUTER SURFACE PROTEIN-A (OSP) OF BORRELIA-BURGDORFERI (BB), A CANDIDATE PROTEIN IN VACCINE DEVELOPMENT SO ARTHRITIS AND RHEUMATISM LA English DT Meeting Abstract C1 BROOKHAVEN NATL LAB,STONY BROOK,NY 11794. SUNY,STONY BROOK,NY 11794. NR 0 TC 0 Z9 0 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0004-3591 J9 ARTHRITIS RHEUM JI Arthritis Rheum. PD SEP PY 1993 VL 36 IS 9 SU S BP S41 EP S41 PG 1 WC Rheumatology SC Rheumatology GA MB816 UT WOS:A1993MB81600015 ER PT J AU HERTZMAN, PA AF HERTZMAN, PA TI ARE THE EOSINOPHILIA-MYALGIA-SYNDROME (EMS) AND THE TOXIC OIL SYNDROME (TOS) CLINICALLY DISTINGUISHABLE SO ARTHRITIS AND RHEUMATISM LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. NR 0 TC 3 Z9 3 U1 0 U2 0 PU LIPPINCOTT-RAVEN PUBL PI PHILADELPHIA PA 227 EAST WASHINGTON SQ, PHILADELPHIA, PA 19106 SN 0004-3591 J9 ARTHRITIS RHEUM JI Arthritis Rheum. PD SEP PY 1993 VL 36 IS 9 SU S BP S115 EP S115 PG 1 WC Rheumatology SC Rheumatology GA MB816 UT WOS:A1993MB81600452 ER PT J AU SMITH, DM LIN, RP FEFFER, P SLASSI, S HURLEY, K MATTESON, J BOWMAN, HB PELLING, RM BRIGGS, M GRUBER, D PETERSON, LE LINGENFELTER, RE VONBALLMOOS, P MALET, I NIEL, M VEDRENNE, G DUROUCHOUX, P WALLYN, P CHAPUIS, C CORK, C LANDIS, D LUKE, P MADDEN, N MALONE, D PEHL, R AF SMITH, DM LIN, RP FEFFER, P SLASSI, S HURLEY, K MATTESON, J BOWMAN, HB PELLING, RM BRIGGS, M GRUBER, D PETERSON, LE LINGENFELTER, RE VONBALLMOOS, P MALET, I NIEL, M VEDRENNE, G DUROUCHOUX, P WALLYN, P CHAPUIS, C CORK, C LANDIS, D LUKE, P MADDEN, N MALONE, D PEHL, R TI COMPTON-BACKSCATTERED ANNIHILATION RADIATION FROM THE GALACTIC-CENTER REGION SO ASTROPHYSICAL JOURNAL LA English DT Article DE GALAXY, CENTER; GAMMA-RAYS, OBSERVATIONS; RADIATION MECHANISMS, MISCELLANEOUS ID MONTE-CARLO CALCULATIONS; GAMMA-RAY SPECTRUM; POSITRON-ANNIHILATION; CENTER DIRECTION; MOLECULAR CLOUD; LINE EMISSION; 1E1740.7-2942; VARIABILITY; MUSCA; NOVA AB On 1989 May 22, the High Energy X-ray and Gamma-ray Observatory for Nuclear Emissions (HEXAGONE), a balloon-borne high-resolution germanium spectrometer with an 18-degrees field of view, observed the Galactic Center (GC) from 25 to 2500 keV. The GC photon spectrum is obtained from the count spectrum by a model-independent method which accounts for the effects of passive material in the instrument and scattering in the atmosphere. Besides a positron annihilation line with a flux of (10.0 +/- 2.4) x 10(-4) photons cm-2 s-1 and a full width at half-maximum (FWHM) of (2.9 + 1.0, -1.1) keV, the spectrum shows a peak centered at (163.7 +/- 3.4) keV with a flux of (1.55 +/- 0.47) x 10(-3) photons cm-2 s-1 and a FWHM of (24.4 +/- 9.2) keV. The energy range 450-507 keV shows no positronium continuum associated with the annihilation line, with a 2 sigma upper limit of 0.90 on the positronium fraction. The 164 keV feature is interpreted as Compton backscatter of broadened and redshifted annihilation radiation, possibly from the source 1E 1740.7-2942. A minimum unscattered annihilation line flux of 0.026 photons cm-2 s-1 would have been required to create this feature, or approximately 10(44) annihilations/s at the GC. Although this flux is not seen in our observation, its absence can be explained by occultation of the unscattered flux, by optically thick material or by light-travel time delay of the scattered flux. C1 UNIV CALIF SAN DIEGO,CTR ASTROPHYS & SPACE SCI,LA JOLLA,CA 92093. CTR ETUD SPATIALE RAYONNEMENTS,F-31029 TOULOUSE,FRANCE. CENS,DEPT PHYS GEN,SERV ASTROPHYS,F-91191 GIF SUR YVETTE,FRANCE. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP SMITH, DM (reprint author), UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720, USA. NR 77 TC 18 Z9 18 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 SEP 1 PY 1993 VL 414 IS 1 BP 165 EP 177 DI 10.1086/173065 PN 1 PG 13 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LU114 UT WOS:A1993LU11400015 ER PT J AU SAGAN, C KHARE, BN THOMPSON, WR MCDONALD, GD WING, MR BADA, JL VO-DINH, T ARAKAWA, ET AF SAGAN, C KHARE, BN THOMPSON, WR MCDONALD, GD WING, MR BADA, JL VO-DINH, T ARAKAWA, ET TI POLYCYCLIC AROMATIC-HYDROCARBONS IN THE ATMOSPHERES OF TITAN AND JUPITER SO ASTROPHYSICAL JOURNAL LA English DT Article DE MOLECULAR PROCESSES; PLANETS AND SATELLITES, INDIVIDUAL (TITAN, JUPITER) ID AMINO-ACIDS; MURCHISON METEORITE; ORGANIC-CHEMISTRY; LASER DESORPTION; CLOUDS; DUST; SPECTROMETRY; PARTICLES; ENVELOPES; THOLINS AB Polycyclic aromatic hydrocarbons (PAHs) are important components of the interstellar medium and carbonaceous chondrites, but have never been identified in the reducing atmospheres of the outer solar system. Incompletely characterized complex organic solids (tholins) produced by irradiating simulated Titan atmospheres reproduce well the observed UV/visible/IR optical constants of the Titan stratospheric haze. Titan tholin and a tholin generated in a crude simulation of the atmosphere of Jupiter are examined by two-step laser desorption/multiphoton ionization mass spectrometry. A range of two- to four-ring PAHs, some with one to four alkylation sites are identified, with net abundance approximately 10(-4) g g-1 (grams per gram) of tholins produced. Synchronous fluorescence techniques confirm this detection. Titan tholins have proportionately more one- and two-ring PAHs than do Jupiter tholins, which in turn have more four-ring and larger PAHs. The four-ringed PAH chrysene, prominent in some discussions of interstellar grains, is found in Jupiter tholins. Solid state C-13 NMR spectroscopy suggests congruent-to 25% of the total C in both tholins is tied up in aromatic and/or aliphatic alkenes. IR spectra indicate an upper limit in both tholins of congruent-to 6% by mass in benzenes, heterocyclics, and PAHs with more than four rings. Condensed PAHs may contribute at most approximately 10% to the observed detached limb haze layers on Titan. As with interstellar PAHs, the synthesis route of planetary PAHs is likely to be via acetylene addition reactions. C1 UNIV CALIF SAN DIEGO, SCRIPPS INST OCEANOG, LA JOLLA, CA 92093 USA. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP SAGAN, C (reprint author), CORNELL UNIV, PLANETARY STUDIES LAB, ITHACA, NY 14853 USA. NR 61 TC 92 Z9 92 U1 3 U2 23 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0004-637X J9 ASTROPHYS J JI Astrophys. J. PD SEP 1 PY 1993 VL 414 IS 1 BP 399 EP 405 DI 10.1086/173086 PN 1 PG 7 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LU114 UT WOS:A1993LU11400036 PM 11539501 ER PT J AU SLOOP, FV BROWN, GM FOOTE, RS JACOBSON, KB SACHLEBEN, RA AF SLOOP, FV BROWN, GM FOOTE, RS JACOBSON, KB SACHLEBEN, RA TI SYNTHESIS OF 3-(TRIETHYLSTANNYL)PROPANOIC ACID - AN ORGANOTIN MASS LABEL FOR DNA SO BIOCONJUGATE CHEMISTRY LA English DT Note ID RESONANCE IONIZATION SPECTROSCOPY; SEQUENCE ANALYSIS; NUCLEIC-ACID; AMINO GROUP; OLIGONUCLEOTIDES; ELECTROPHORESIS AB The synthesis of 3-(triethylstannyl)propanoic acid (TESPA), an organometallic reporter group that enables the mass labeling of oligonucleotides with stable isotopes of tin, is described. Synthesized from commercially available isotopically-enriched SnO2 in a five step process, the NHS ester of TESPA is produced with an overall yield of 40 %. This simplification of the standard synthetic scheme, with two less synthetic steps and a coincident 60 % yield increase, is accomplished through the use of the reagent N-(acryloxy)succinimide and the free radical initiator AMPN. The conditions for the attachment of the reporter group to priming oligonucleotides and the subsequent HPLC isolation of the labeled primers are also detailed. C1 OAK RIDGE NATL LAB,DIV BIOL,BLDG 4500S,MAILSTOP 6119,OAK RIDGE,TN 37831. 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 22 TC 5 Z9 5 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 1043-1802 J9 BIOCONJUGATE CHEM JI Bioconjugate Chem. PD SEP-OCT PY 1993 VL 4 IS 5 BP 406 EP 409 DI 10.1021/bc00023a017 PG 4 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Multidisciplinary; Chemistry, Organic SC Biochemistry & Molecular Biology; Chemistry GA MA374 UT WOS:A1993MA37400017 PM 8274526 ER PT J AU SMITH, RD LIGHTWAHL, KJ AF SMITH, RD LIGHTWAHL, KJ TI THE OBSERVATION OF NONCOVALENT INTERACTIONS IN SOLUTION BY ELECTROSPRAY-IONIZATION MASS-SPECTROMETRY - PROMISE, PITFALLS AND PROGNOSIS SO BIOLOGICAL MASS SPECTROMETRY LA English DT Article ID CONFORMATIONAL-CHANGES; PROTEIN; IONS; COMPLEXES; SUBSTRATE; SOLVENTS; PEPTIDE; WATER RP SMITH, RD (reprint author), PACIFIC NW LAB, DEPT CHEM SCI, CHEM METHODS & SEPARAT GRP, RICHLAND, WA 99352 USA. RI Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 43 TC 306 Z9 307 U1 1 U2 16 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 1052-9306 J9 BIOL MASS SPECTROM JI Biol. Mass Spectrom. PD SEP PY 1993 VL 22 IS 9 BP 493 EP 501 DI 10.1002/bms.1200220902 PG 9 WC Biophysics; Spectroscopy SC Biophysics; Spectroscopy GA LV942 UT WOS:A1993LV94200001 ER PT J AU MENDELL, NR FINCH, SJ THODE, HC AF MENDELL, NR FINCH, SJ THODE, HC TI WHERE IS THE LIKELIHOOD RATIO TEST POWERFUL FOR DETECTING 2-COMPONENT NORMAL MIXTURES SO BIOMETRICS LA English DT Article DE ANDERSON-DARLING TEST; CLUSTERING; ENGELMAN-HARTIGAN TEST; GRUBBS TEST; KURTOSIS; MAJOR GENE; OUTLIER TESTS; PROBABILITY PLOT CORRELATION TEST; SKEWNESS; WILK-SHAPIRO TEST ID PERCENTAGE POINTS; DISTRIBUTIONS; SAMPLES; NUMBER; HLA AB We compare the power of the likelihood ratio test, the Engelman-Hartigan test, two outlier tests, four goodness-of-fit tests, and eight tests of normality to detect a mixture consisting of two components that are normally distributed with different means but equal variances. We consider the entire range of mixing proportions pi, 0 < pi < 1. For pi > .85 or pi < .1 5, overall Fisher's skewness statistic is best with Filliben's probability plot correlation coefficient test somewhat less powerful. A combined skewness and kurtosis test, the Anderson-Darling test, and the likelihood ratio test are also competitive. For .35 < pi < .65, the Engelman-Hartigan test is best. For other mixing proportions, the likelihood ratio test is best. For situations in which the preferred test had power 50% or more, the power of the likelihood ratio test is also above 50% and within 15 percentage points of the preferred test. C1 SUNY,DEPT EMERGENCY MED,STONY BROOK,NY 11794. BROOKHAVEN NATL LAB,INJURY PREVENT & ANAL GRP,UPTON,NY 11973. RP MENDELL, NR (reprint author), SUNY,DEPT APPL MATH & STAT,STONY BROOK,NY 11794, USA. FU NIMH NIH HHS [MH49487] NR 37 TC 23 Z9 23 U1 0 U2 0 PU INTERNATIONAL BIOMETRIC SOC PI WASHINGTON PA 808 17TH ST NW SUITE 200, WASHINGTON, DC 20006-3910 SN 0006-341X J9 BIOMETRICS JI Biometrics PD SEP PY 1993 VL 49 IS 3 BP 907 EP 915 DI 10.2307/2532212 PG 9 WC Biology; Mathematical & Computational Biology; Statistics & Probability SC Life Sciences & Biomedicine - Other Topics; Mathematical & Computational Biology; Mathematics GA LZ592 UT WOS:A1993LZ59200024 PM 8241377 ER PT J AU FONTANA, W KONINGS, DAM STADLER, PF SCHUSTER, P AF FONTANA, W KONINGS, DAM STADLER, PF SCHUSTER, P TI STATISTICS OF RNA SECONDARY STRUCTURES SO BIOPOLYMERS LA English DT Article ID EVOLUTIONARY OPTIMIZATION; FITNESS LANDSCAPES; RUGGED LANDSCAPES; BASE PAIR; SEQUENCES; SELECTION; PREDICTIONS; ALGORITHM; LIGANDS; DNA AB A statistical reference for RNA secondary structures with minimum free energies is computed by folding large ensembles of random RNA sequences. Four nucleotide alphabets are used: two binary alphabets, AU and GC, the biophysical AUGC and the synthetic GCXK alphabet. RNA secondary structures are made of structural elements, such as stacks, loops, joints, and free ends. Statistical properties of these elements are computed for small RNA molecules of chain lengths up to 100. The results of RNA structure statistics depend strongly on the particular alphabet chosen. The statistical reference is compared with the data derived from natural RNA molecules with similar base frequencies. Secondary structures are represented as trees. Tree editing provides a quantitative measure for the distance d(t), between two structures. We compute a structure density surface as the conditional probability of two structures having distance t given that their sequences have distance h. This surface indicates that the vast majority of possible minimum free energy secondary structures occur within a fairly small neighborhood of any typical (random) sequence. Correlation lengths for secondary structures in their tree representations are computed from probability densities. They are appropriate measures for the complexity of the sequence-structure relation. The correlation length also provides a quantitative estimate for the mean sensitivity of structures to point mutations. (C) 1993 John Wiley & Sons, Inc. C1 UNIV COLORADO, DEPT MOLEC CELLULAR & DEV BIOL, BOULDER, CO 80309 USA. LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. UNIV VIENNA, INST THEORET CHEM, A-1090 VIENNA, AUSTRIA. SANTA FE INST, SANTA FE, NM 87501 USA. INST MOLEK BIOTECHNOL, O-690 JENA, GERMANY. RI Stadler, Peter F./L-7857-2015 OI Stadler, Peter F./0000-0002-5016-5191 NR 44 TC 195 Z9 197 U1 0 U2 4 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0006-3525 EI 1097-0282 J9 BIOPOLYMERS JI Biopolymers PD SEP PY 1993 VL 33 IS 9 BP 1389 EP 1404 DI 10.1002/bip.360330909 PG 16 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA LT692 UT WOS:A1993LT69200008 PM 7691201 ER PT J AU DUNAHAY, TG AF DUNAHAY, TG TI TRANSFORMATION OF CHLAMYDOMONAS-REINHARDTII WITH SILICON-CARBIDE WHISKERS SO BIOTECHNIQUES LA English DT Note ID MEDIATED DNA DELIVERY; CHLOROPLAST TRANSFORMATION; NUCLEAR TRANSFORMATION; NITRATE REDUCTASE; PLANT-CELLS; ELECTROPORATION; GENE AB Nuclear transformation of intact (walled) cells of the green alga Chlamydomonas reinhardtii was achieved by agitating the cells in the presence of plasmid DNA and silicon carbide (SiC) whiskers. The protocol was used to introduce the wild-type nitrate reductase structural gene into the nitrate reductase-deficient mutant strain nit1-305. Using SiC whiskers, 10-100 transformants per 10(7) cells were routinely produced which is comparable to transformation rates achieved by agitating the cells with glass beads. In contrast to the glass bead protocol, cell viability was very high following treatment with SiC, with greater than 80% cell survival after agitation for 10 min. Agitation with SiC whiskers appears to be an efficient method for introducing DNA into intact C. reinhardtii cells and may prove to be applicable to other algal species for which cell wall mutants or protoplasting procedures are unavailable. RP DUNAHAY, TG (reprint author), NATL RENEWABLE ENERGY LAB,APPL BIOL SCI BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA. NR 22 TC 79 Z9 84 U1 3 U2 28 PU EATON PUBLISHING CO PI NATICK PA 154 E. CENTRAL ST, NATICK, MA 01760 SN 0736-6205 J9 BIOTECHNIQUES JI Biotechniques PD SEP PY 1993 VL 15 IS 3 BP 452 EP & PG 0 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA LW417 UT WOS:A1993LW41700024 PM 8217158 ER PT J AU BENNETT, PV SUTHERLAND, BM AF BENNETT, PV SUTHERLAND, BM TI QUANTITATIVE DETECTION OF SINGLE-COPY GENES IN NANOGRAM SAMPLES OF HUMAN GENOMIC DNA SO BIOTECHNIQUES LA English DT Article ID GEL-ELECTROPHORESIS; PYRIMIDINE DIMERS; FLUORESCENCE; FRAGMENTS; REPAIR; RESOLUTION; SEQUENCES; DAMAGE AB We have developed methods for Southern hybridization analysis of single-copy genes in as little as 10 ng of mammalian DNA electrophoresed under either neutral or alkaline conditions. The signal on the radiogram is proportional to the quantity of DNA. These methods permit Southern hybridization analysis of DNA from about 2 x 10(3) cultured human cells. The use of minimal cell numbers greatly reduces the costs of culturing cells for hybridization analysis and makes feasible analysis of DNA from tissues or cell types available only in limited quantities. C1 BROOKHAVEN NATL LAB,DEPT BIOL,BLDG 463,UPTON,NY 11973. FU NCI NIH HHS [CA23096] NR 23 TC 4 Z9 4 U1 0 U2 1 PU EATON PUBLISHING CO PI NATICK PA 154 E. CENTRAL ST, NATICK, MA 01760 SN 0736-6205 J9 BIOTECHNIQUES JI Biotechniques PD SEP PY 1993 VL 15 IS 3 BP 520 EP 525 PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA LW417 UT WOS:A1993LW41700035 PM 8217168 ER PT J AU FELINGER, A GUIOCHON, G AF FELINGER, A GUIOCHON, G TI THE CHANGE OF PRESSURE-DROP DURING LARGE-SCALE CHROMATOGRAPHY OF VISCOUS SAMPLES SO BIOTECHNOLOGY PROGRESS LA English DT Article ID LIQUID-CHROMATOGRAPHY; PROPAGATION; SIMULATION; BAND AB The variation of the inlet pressure during the injection and the elution of a band of a viscous compound, or pressure-drop profile, was calculated in overloaded elution chromatography, assuming a significant difference between the viscosities of the solvent and the pure solute. The viscosity of the mixture was calculated using the Grunberg-Nissan equation. By means of the numerical integration of the mass balance equation, the concentration profile along the length of the column was calculated. Then, using the instantaneous concentration profile to derive the local viscosity, hence the local pressure gradient, the pressure drop was determined by integrating the local pressure gradient along the column. The change of pressure drop calculated is significant only when the concentration of the injected sample is very high. If a dilute sample is injected, even large sample volumes will not really change the pressure drop. The maximum pressure drop observed in each case is practically independent of the absorption isotherm. The only determining factors are the solute concentration in the sample, the amount of sample injected, and the solute diffusivity. C1 OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831. UNIV TENNESSEE CTR HLTH SCI,DEPT CHEM,MEMPHIS,TN 38163. RI Felinger, Attila/A-1595-2008 OI Felinger, Attila/0000-0001-7130-1968 NR 11 TC 8 Z9 8 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 8756-7938 J9 BIOTECHNOL PROGR JI Biotechnol. Prog. PD SEP-OCT PY 1993 VL 9 IS 5 BP 450 EP 455 DI 10.1021/bp00023a002 PG 6 WC Biotechnology & Applied Microbiology; Food Science & Technology SC Biotechnology & Applied Microbiology; Food Science & Technology GA MD874 UT WOS:A1993MD87400002 PM 7764161 ER PT J AU MOSESSON, MW DIORIO, JP SIEBENLIST, KR WALL, JS HAINFELD, JF AF MOSESSON, MW DIORIO, JP SIEBENLIST, KR WALL, JS HAINFELD, JF TI EVIDENCE FOR A 2ND TYPE OF FIBRIL BRANCH POINT IN FIBRIN POLYMER NETWORKS, THE TRIMOLECULAR JUNCTION SO BLOOD LA English DT Article ID ELECTRON-MICROSCOPY; LIGHT-SCATTERING; CLOT STRUCTURE; IDENTIFICATION; TURBIDITY; THROMBIN; DOMAINS; FIBERS; SITES; FINE C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. RP MOSESSON, MW (reprint author), UNIV WISCONSIN,SCH MED,SINAI SAMARITAN MED CTR,950 N 12 ST,MILWAUKEE,WI 53233, USA. FU NCRR NIH HHS [RR-01777]; NHLBI NIH HHS [HL 28444, HL-47000] NR 46 TC 48 Z9 50 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 SEP 1 PY 1993 VL 82 IS 5 BP 1517 EP 1521 PG 5 WC Hematology SC Hematology GA LX117 UT WOS:A1993LX11700017 PM 8364202 ER PT J AU WILLIAMS, TA GOLDEN, MJH VOIGT, C KLAISS, H AF WILLIAMS, TA GOLDEN, MJH VOIGT, C KLAISS, H TI SOLAR PROCESS HEAT-GENERATION BY PARABOLIC CHANNEL PLANT SO BRENNSTOFF-WARME-KRAFT LA German DT Article AB The authors present a solar-thermal parabolic channel plant, installed at Tehachapi (California), which provides a prison with process and industrial water in fuel-saving operation. The plant design. its performance data and operational results are described. The cost-effectiveness of the plant is considered, which is secured for the operator by a long-term utilization agreement (30 years). C1 DLR,INST TECH THERMODYNAM,STUTTGART,GERMANY. RP WILLIAMS, TA (reprint author), NRL,NATL RENEWABLE ENERGY LAB,GOLDEN,CA, USA. NR 6 TC 3 Z9 3 U1 0 U2 1 PU V D I VERLAG GMBH PI DUSSELDORF 1 PA VERLAG VEREINS DTSCH ING, POSTFACH 8228, HEINRICHSTRASSE 24, W-4000 DUSSELDORF 1, GERMANY SN 0006-9612 J9 BRENNST-WARME-KRAFT JI Brennst.-Warme-Kraft PD SEP PY 1993 VL 45 IS 9 BP 412 EP 415 PG 4 WC Thermodynamics; Energy & Fuels; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA LZ064 UT WOS:A1993LZ06400006 ER PT J AU SHEVENELL, L GOFF, F AF SHEVENELL, L GOFF, F TI ADDITION OF MAGMATIC VOLATILES INTO THE HOT-SPRING WATERS OF LOOWIT CANYON, MOUNT ST-HELENS, WASHINGTON, USA SO BULLETIN OF VOLCANOLOGY LA English DT Article DE MAGMATIC VOLATILES; HOT SPRINGS; MOUNT ST-HELENS; DEGASSING GEOCHEMISTRY AB Geochemical studies on cold meteoric waters, post-1980 hot spring waters, fumarole emissions from the dacite dome, and volcanic rocks at Mount St. Helens (MSH) from 1985 to 1989 show that magmatic volatiles are involved in the formation of a new hydrothermal system. Hot spring waters are enriched in deltaO-18 by as much as 2 parts per thousand and display enrichments in deltaD relative to cold waters. A well-defined isotopic trend is displayed by the isotopic composition of a >400-degrees-C fumarole condensate collected from the central crater in 1980 (-33 parts per thousand deltaD, + 6 parts per thousand deltaO-18), of condensate samples collected on the dome, and of cold meteoric and hot spring waters. The trend indicates that mixing occurs between local meteoric water and magmatic water degassing from the dacite dome. Between 30 and 70% magmatic water is present in the dome fumarole discharges and almost-equal-to 10% magmatic water has been added to the waters of the hydrothermal system. Relations between, Cl, SO4 and HCO3 indicate that the hot spring waters are immature volcanic waters formed by reaction of rocks with waters generated by absorption of acidic volcanic fluids. In addition, the B/Cl ratios of the spring waters are similar to the B/Cl ratios of the fumarole condensates (almost-equal-to 0.02), values of deltaC-13 in the HCO3 of the hot springs (-9.5 to -13.5 parts per thousand) are similar to the magmatic value at MSH (-10.5 parts per thousand), and the He-3/He-4 ratio, relative to air, in a hot spring water is 5.7, suggesting a magmatic origin for this component. RP SHEVENELL, L (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. NR 0 TC 31 Z9 31 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0258-8900 J9 B VOLCANOL JI Bull. Volcanol. PD SEP PY 1993 VL 55 IS 7 BP 489 EP 503 DI 10.1007/BF00304592 PG 15 WC Geosciences, Multidisciplinary SC Geology GA MA641 UT WOS:A1993MA64100003 ER PT J AU WANG, K CHATTERTON, BDE ATTREP, M ORTH, CJ AF WANG, K CHATTERTON, BDE ATTREP, M ORTH, CJ TI LATE ORDOVICIAN MASS EXTINCTION IN THE SELWYN BASIN, NORTHWESTERN CANADA - GEOCHEMICAL, SEDIMENTOLOGICAL, AND PALEONTOLOGICAL EVIDENCE SO CANADIAN JOURNAL OF EARTH SCIENCES LA English DT Article ID ISOTOPIC COMPOSITION; BRACHIOPODS; BOUNDARY; OCEANS; VENTILATION; ENCRINURINE; TRILOBITES; RADIATION; ELEMENTS AB We present a detailed study of the trace element and stable isotope geochemistry, sedimentology, and fossil distributions in two Avalanche Lake (AV4B, AV1) Ordovician-Silurian boundary sections in the Selwyn Basin. Trilobites and conodonts indicate a profound extinction at the end of the Ordovician, which is constrained stratigraphically within a <60 cm interval at AV4B. Facies analysis suggests that the extinction interval coincides with the maximum shallowing (low stand of sea level), which was probably caused by a galcioeustatic regression induced by the Late Ordovician Gondwanan glaciation. The extinction crisis is also signalled by the change in carbonate deltaC-13: a sudden ''Strangelove ocean'' deltaC-13 excursion (> 3 parts per thousand in magnitude) is recorded in the extinction interval. Iridium abundances (0.051 ppb) in the extinction interval are low and fail to provide evidence for an impact. The highest Ir abundance is found to be associated with reduced sedimentation in a condensed horizon. Cerium anomalies indicate a short period of basin ventilation in the otherwise anoxic Selwyn Basin. The extinction occurred during the time of this basin ventilation, which was probably caused by the cold climate during the glaciation. The ventilation may have triggered upwelling of the deep water through vertical advection, bringing up toxic material, poisoning the upper-water photic zone, and causing the extinction. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. RP WANG, K (reprint author), UNIV ALBERTA, DEPT GEOL, EDMONTON T6G 2E3, ALBERTA, CANADA. NR 56 TC 35 Z9 35 U1 1 U2 5 PU CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS PI OTTAWA PA 1200 MONTREAL ROAD, BUILDING M-55, OTTAWA, ON K1A 0R6, CANADA SN 0008-4077 EI 1480-3313 J9 CAN J EARTH SCI JI Can. J. Earth Sci. PD SEP PY 1993 VL 30 IS 9 BP 1870 EP 1880 DI 10.1139/e93-165 PG 11 WC Geosciences, Multidisciplinary SC Geology GA MQ644 UT WOS:A1993MQ64400010 ER PT J AU SCHNABEL, A HAMRICK, JL WELLS, PV AF SCHNABEL, A HAMRICK, JL WELLS, PV TI INFLUENCE OF QUATERNARY HISTORY ON THE POPULATION GENETIC-STRUCTURE OF DOUGLAS-FIR (PSEUDOTSUGA-MENZIESII) IN THE GREAT-BASIN SO CANADIAN JOURNAL OF FOREST RESEARCH-REVUE CANADIENNE DE RECHERCHE FORESTIERE LA English DT Article ID NEEDLE TISSUE; INHERITANCE; DISTANCE; ISOZYMES; PINE AB We used data from 20 enzyme loci to test hypotheses concerning the population genetic structure of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in the Great Basin relative to the southern Rocky Mountains of Utah. Detailed macrofossil data from wood rat (Neotoma) middens indicate that P. menziesii was absent from the central and northern Great Basin during the last glacial (20 000 - 12 000 years before present), but has recolonized several of the ''island'' mountain ranges of that region during the past 10 000 years by long-distance dispersal from populations on the southern Rocky Mountain ''mainland''. The genetic consequences of rare, chance dispersal events should be a reduction in levels of genetic diversity on Great Basin montane islands and more diversity among island populations relative to the Rocky Mountain mainland. We found moderate overall reductions in the level of polymorphism (65 vs. 85%), numbers of alleles per polymorphic locus (2.69 vs. 2.82), and gene diversity (0.113 vs. 0.141) in Great Basin P. menziesii relative to P. menziesii from the Rocky Mountain mainland. Within-population estimates of allozyme diversity, as well as relative partitioning of that diversity among populations of each region, differed to a lesser extent between island and mainland regions. Founder effects and genetic drift thus appear to have had a minor role in shaping the present-day genetic structure of Great Basin P. menziesii populations. C1 UNIV GEORGIA,DEPT BOT,ATHENS,GA 30602. UNIV GEORGIA,DEPT GENET,ATHENS,GA 30602. UNIV KANSAS,DEPT BOT,LAWRENCE,KS 66045. RP SCHNABEL, A (reprint author), UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29802, USA. NR 36 TC 7 Z9 7 U1 0 U2 1 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 SEP PY 1993 VL 23 IS 9 BP 1900 EP 1906 DI 10.1139/x93-240 PG 7 WC Forestry SC Forestry GA ME342 UT WOS:A1993ME34200022 ER PT J AU STEENLAND, K TUCKER, J SALVAN, A AF STEENLAND, K TUCKER, J SALVAN, A TI PROBLEMS IN ASSESSING THE RELATIVE PREDICTIVE VALUE OF INTERNAL MARKERS VERSUS EXTERNAL EXPOSURE IN CHRONIC DISEASE EPIDEMIOLOGY SO CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION LA English DT Review ID SISTER CHROMATID EXCHANGES; INTERMEDIATE END-POINTS; LUNG-CANCER; ASBESTOSIS; MORTALITY; VALIDATION; ENDPOINTS; WORKERS; RISK; RATS AB Epidemiology traditionally has relied on measures of ''external'' exposure in determining the association between exposure and disease. Recently, there has been increasing reliance on internal markers reflecting internal dose and/or early stages of disease. In the context of observational studies of chronic disease in which there is a known exposure-disease association, the question arises whether the external exposure or the internal marker is a better predictor of eventual disease outcome. Here we describe some simple approaches to evaluate the relative predictive value of the internal marker (or biomarker, defined in the most general sense) versus the exposure, as well as their limitations. The problems of assessing the predictive value of internal markers for chronic disease are illustrated via two examples: (a) carcinogens, cytogenetic outcomes, and cancer; and (b) asbestos, asbestosis, and lung cancer. We conclude that it is unlikely that observational epidemiology will allow a full assessment of the predictive value of cytogenetic outcomes versus exposure for cancer in humans exposed to known carcinogens in the near future, although animal studies could provide important complementary information. For asbestos, data to date indicate that the presence or absence of asbestosis is a better predictor of lung cancer in an exposed population than is the level of exposure to asbestos itself. In general, the most useful markers for predicting chronic disease are ones which persist over time. C1 LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI L452,LIVERMORE,CA 94550. RP STEENLAND, K (reprint author), NIOSH,CINCINNATI,OH 45226, USA. NR 30 TC 6 Z9 7 U1 0 U2 0 PU AMER ASSOC CANCER RESEARCH PI PHILADELPHIA PA PUBLIC LEDGER BLDG, SUITE 816, 150 S. INDEPENDENCE MALL W., PHILADELPHIA, PA 19106 SN 1055-9965 J9 CANCER EPIDEM BIOMAR JI Cancer Epidemiol. Biomarkers Prev. PD SEP-OCT PY 1993 VL 2 IS 5 BP 487 EP 491 PG 5 WC Oncology; Public, Environmental & Occupational Health SC Oncology; Public, Environmental & Occupational Health GA LX261 UT WOS:A1993LX26100014 PM 8220095 ER PT J AU BARCELLOSHOFF, MH AF BARCELLOSHOFF, MH TI RADIATION-INDUCED TRANSFORMING GROWTH-FACTOR-BETA AND SUBSEQUENT EXTRACELLULAR-MATRIX REORGANIZATION IN MURINE MAMMARY-GLAND SO CANCER RESEARCH LA English DT Article ID INDUCED PULMONARY FIBROSIS; RNA ENCODING PROCOLLAGENS; TUMOR-NECROSIS-FACTOR; IONIZING-RADIATION; MESSENGER-RNA; TGF-BETA; GENE-EXPRESSION; ENDOTHELIAL-CELLS; SKIN CARCINOGENESIS; HUMAN KERATINOCYTES AB Little is known about radiation-induced protein expression in vivo nor has the relationship between early molecular events and subsequent tissue repair, fibrosis, or carcinogenesis been fully appraised. In this study, expression of proteins involved in tissue remodeling was examined in mammary gland immediately and shortly after ionizing radiation exposure. Using indirect immunofluorescence, selected antigens were followed as a function of time after 0, 5, or 10 Gy of whole body gamma-radiation in the mammary gland of adult female BALB/c mice. Rapid induction of transforming growth factor beta (TGF beta) immunoreactivity was observed at 1 h post radiation. Extracellular and intracellular TGF beta increased in the periepithelial stromal sheath as evidenced by immunoreactivity with antibodies CC(1-30) and LC(1-30), respectively. Furthermore, both extracellular and intracellular TGF beta were unexpectedly expressed in the previously negative adipose stroma. Elevated expression persisted for 7 days after irradiation. Thus an early response to radiation exposure is the induction of TGF beta, which mediates myriad events during tissue repair, growth, and extracellular matrix production. The distribution of extracellular matrix proteins was examined as a function of time post radiation exposure. Collagen III immunoreactivity decreased in the periepithelial stroma at day 1. In contrast, at day 3 collagen III was newly evident in the adipose stroma, and periepithelial collagen III had increased in both abundance and intensity. By day 7 collagen III expression in the adipose stroma had resolved but was enhanced in the periepithelial stroma. Over this same period stromal collagen I immunoreactivity surrounding the epithelium became diffuse and possibly diminished. Fibronectin, laminin, and collagen IV localization were unchanged over the time course. I postulate that radiation-induced TGF beta may mediate the remodeling of the stromal extracellular matrix in the irradiated mammary gland. RP BARCELLOSHOFF, MH (reprint author), LAWRENCE BERKELEY LAB,DIV LIFE SCI,BLDG 47 159,BERKELEY,CA 94720, USA. FU NCI NIH HHS [CA51841] NR 59 TC 163 Z9 168 U1 0 U2 2 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 SEP 1 PY 1993 VL 53 IS 17 BP 3880 EP 3886 PG 7 WC Oncology SC Oncology GA LU579 UT WOS:A1993LU57900009 PM 8358713 ER PT J AU KOHEN, E KOHEN, C HIRSCHBERG, JG SANTUS, R GRABOWSKI, G MANGEL, W GATT, S PRINCE, J AF KOHEN, E KOHEN, C HIRSCHBERG, JG SANTUS, R GRABOWSKI, G MANGEL, W GATT, S PRINCE, J TI AN IN-SITU STUDY OF BETA-GLUCOSIDASE ACTIVITY IN NORMAL AND GAUCHER FIBROBLASTS WITH FLUOROGENIC PROBES SO CELL BIOCHEMISTRY AND FUNCTION LA English DT Article DE BETA-GLUCOSIDASE; FIBROBLASTS; GAUCHERS DISEASE; FLUOROGENIC PROBES; MICROSPECTROFLUOROMETRY ID SINGLE LIVING CELLS AB Beta-glucosidase activity was evaluated in situ by means of fluorogenic probes in normal human fibroblasts and fibroblasts from homozygous carriers of the Gaucher trait. Probe internalization, targeting to lysosomes and post-cleavage probe retention were the primary concerns. Internalization and targeting were attempted by in situ photosensitized labilization of lysosomal membranes, lysosomotropic detergents and the use of low density lipid (LDL) or the receptor ligand apolipoprotein E (ApoE). Post-cleavage increase of fluorescence with fluoresceinyl (bis) beta-glucopyranoside was appreciably above the rather large pre-cleavage emission. In cells incubated overnight with nonylumbelliferylbetaglucoside (UG9) in the presence of bovine serum albumin and in the absence of ApoE, the probe was dealt with as a cytotoxic agent, accumulating in a paranuclear cap, most likely comprising elements of the endoplasmic reticulum (ER) and Golgi apparatus. Targeting of UG9 to lysosomes occurred within 1 to 3 h of preincubation in the presence of ApoE. There was some evidence of specificity, as Gaucher fibroblasts exhibited weaker cleavage of UG9 (by 50 per cent or more) compared to normal fibroblasts, but in the Gaucher cells there was some residual beta-glucosidase activity. Cleavage of UG9 was nearly totally suppressed in Gaucher cells treated with the beta-glucosidase inhibitor, conduritol B epoxide, for 24 h to 7 days. Suppression in the control fibroblasts was evident but to a lesser degree. The in situ method of fluorogenic assay established for beta-glucosidase deficiency, is in principle applicable to enzyme deficiencies in other lysosomal storage diseases, or to evaluate enhanced enzyme activity following gene therapy. C1 UNIV MIAMI,DEPT PHYS,CORAL GABLES,FL 33124. MUSEUM NATL HIST NAT,INSERM,U312,PHYSICOCHIM ADAPTAT BIOL LAB,F-75231 PARIS 05,FRANCE. MT SINAI MED CTR,JACK & LUCY CLARK DEPT PEDIAT,DEPT MED & MOLEC GENET,NEW YORK,NY 10029. BROOKHAVEN NATL LAB,UPTON,NY 11973. HEBREW UNIV JERUSALEM,HADASSAH MED SCH,DEPT MEMBRANE BIOCHEM & NEUROCHIM,IL-91010 JERUSALEM,ISRAEL. RP KOHEN, E (reprint author), UNIV MIAMI,DEPT BIOL,COX SCI BLDG,POB 249118,CORAL GABLES,FL 33124, USA. NR 34 TC 12 Z9 13 U1 0 U2 3 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0263-6484 J9 CELL BIOCHEM FUNCT JI Cell Biochem. Funct. PD SEP PY 1993 VL 11 IS 3 BP 167 EP 177 DI 10.1002/cbf.290110304 PG 11 WC Biochemistry & Molecular Biology; Cell Biology SC Biochemistry & Molecular Biology; Cell Biology GA LU350 UT WOS:A1993LU35000003 PM 8403230 ER PT J AU MOSELEY, JL OBRIEN, TJ AF MOSELEY, JL OBRIEN, TJ TI A MODEL FOR AGGLOMERATION IN A FLUIDIZED-BED SO CHEMICAL ENGINEERING SCIENCE LA English DT Article ID GRANULAR FLOW; COAL-ASH AB Experiments indicate that at a fixed superficial gas velocity, defluidization, as a result of massive agglomeration of the particles in a fluidized bed, occurs sharply when the bed temperature reaches a certain value. At a given temperature, the defluidization velocity is defined to be the minimum superficial gas velocity needed to avoid defluidization. In this report, an estimate of the defluidization velocity is developed using a two-particle collision model and a model for the granular energy of the bed. Using the available data on the material properties of coal ash as a function of temperature, the defluidization velocity is expressed as a function of bed temperature and particle and gas properties. A comparison with experimental data is made, and a simplified formula suitable for correlation studies is suggested. C1 US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26507. RP MOSELEY, JL (reprint author), EG&G WASC INC,MORGANTOWN ENERGY TECHNOL CTR,POB 880,MORGANTOWN,WV 26507, USA. NR 34 TC 40 Z9 41 U1 1 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0009-2509 J9 CHEM ENG SCI JI Chem. Eng. Sci. PD SEP PY 1993 VL 48 IS 17 BP 3043 EP 3050 DI 10.1016/0009-2509(93)80170-U PG 8 WC Engineering, Chemical SC Engineering GA LN747 UT WOS:A1993LN74700005 ER PT J AU MULLIN, AS PARK, J CHOU, JZ FLYNN, GW WESTON, RE AF MULLIN, AS PARK, J CHOU, JZ FLYNN, GW WESTON, RE TI SOME ROTATIONS LIKE IT HOT - SELECTIVE ENERGY PARTITIONING IN THE STATE-RESOLVED DYNAMICS OF COLLISIONS BETWEEN CO2 AND HIGHLY VIBRATIONALLY EXCITED PYRAZINE SO CHEMICAL PHYSICS LA English DT Article ID CHEMICALLY SIGNIFICANT AMOUNTS; DIODE-LASER SPECTROSCOPY; POLYATOMIC-MOLECULES; RADIATIONLESS TRANSITIONS; STRETCHING VIBRATIONS; ABSORPTION-SPECTRA; UV ABSORPTION; AZULENE; RELAXATION; DEACTIVATION AB The collisional quenching of highly vibrationally excited pyrazine by CO2 molecules has been studied with high resolution diode laser spectroscopy. The vibrationally hot pyrazine molecules are formed by 248 nm excimer laser pumping, followed by rapid radiationless transitions to the ground electronic state. The nascent rotational population distributions in the 00(0)0 and 00(0)1 vibrational levels of CO2 produced by collisions with hot pyrazine were probed at short times following excitation of pyrazine by the excimer laser pulse. In addition, the CO2 translational recoil velocity was measured for a number of rotational levels in each vibrational state. The results of these experiments reveal that very little rotational and translational excitation accompanies the energy transfer from hot pyrazine to excited vibrational levels of CO2. In contrast, rotational excitation of the CO2 ground state due to collisions with highly excited pyrazine is significant and is accompanied by a substantial enhancement in the CO2 translational energy. These results are consistent with a picture in which vibration-vibration (V --> V) energy transfer processes, leading to vibrational excitation of the bath, are dominated by long range attractive forces, and vibration-translation/rotation (V --> T/R) energy transfer, which leaves the bath vibrations unexcited, is dominated by short range repulsive forces. C1 COLUMBIA UNIV,COLUMBIA RADIAT LAB,NEW YORK,NY 10027. BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973. RP MULLIN, AS (reprint author), COLUMBIA UNIV,DEPT CHEM,NEW YORK,NY 10027, USA. RI Mullin, Amy/C-4099-2009 NR 54 TC 60 Z9 60 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0301-0104 J9 CHEM PHYS JI Chem. Phys. PD SEP 1 PY 1993 VL 175 IS 1 BP 53 EP 70 DI 10.1016/0301-0104(93)80228-2 PG 18 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LV231 UT WOS:A1993LV23100006 ER PT J AU JAMISON, GM LOY, DA SHEA, KJ AF JAMISON, GM LOY, DA SHEA, KJ TI BRIDGED POLYGERMSESQUIOXANES - ORGANICALLY MODIFIED GERMANIUM OXIDE MATERIALS SO CHEMISTRY OF MATERIALS LA English DT Note ID PRECURSORS AB The first examples of bridged polygermsesquioxanes were prepared by hydrolysis and condensation of 1,6-bis(trichlorogermyl)hexane 1 and 1,6-bis(triethoxy-germyl)hexane2. Supercritical extraction of the resulting gels with carbon dioxide afforded high surface area aerogels of the organically modified germanium oxides. C1 SANDIA NATL LABS,DEPT PROPERTIES ORGAN MAT,ORG 1812,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 31 TC 10 Z9 10 U1 0 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0897-4756 J9 CHEM MATER JI Chem. Mat. PD SEP PY 1993 VL 5 IS 9 BP 1193 EP 1195 DI 10.1021/cm00033a001 PG 3 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA LY929 UT WOS:A1993LY92900001 ER PT J AU ZALENSKY, AO BRENEMAN, JW ZALENSKAYA, IA BRINKLEY, BR BRADBURY, EM AF ZALENSKY, AO BRENEMAN, JW ZALENSKAYA, IA BRINKLEY, BR BRADBURY, EM TI ORGANIZATION OF CENTROMERES IN THE DECONDENSED NUCLEI OF MATURE HUMAN SPERM SO CHROMOSOMA LA English DT Article ID METAPHASE CHROMOSOMES; INSITU HYBRIDIZATION; HUMAN SPERMATOZOA; CENP-A; PROTEINS; KINETOCHORE; CELLS; SERA; SPERMIOGENESIS; CHROMATIN AB The localization of centromeres in mature human sperm was shown by immunofluorescent labeling and nonisotopic in situ hybridization. In the decondensed nucleus structural elements (dimers, tetramers, linear arrays and V shape structures) formed by individual centromeres of nonhomologous chromosomes were observed. They organize the compact chromocenter, which was shown for nuclei decondensed to a low extent. The chromocenter is buried inside the nucleus; in contrast, telomeric regions of chromosomes were tentatively localized on the periphery. Thus, a gross architecture, which can influence selective unpackaging of the paternal genome upon fertilization, exists in human sperm. C1 BAYLOR COLL MED,TEXAS MED CTR,HOUSTON,TX 77030. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. RP ZALENSKY, AO (reprint author), UNIV CALIF DAVIS,SCH MED,DEPT BIOL CHEM,DAVIS,CA 95616, USA. FU NCI NIH HHS [CA-41424] NR 32 TC 67 Z9 68 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0009-5915 J9 CHROMOSOMA JI Chromosoma PD SEP PY 1993 VL 102 IS 8 BP 509 EP 518 DI 10.1007/BF00368344 PG 10 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA MA070 UT WOS:A1993MA07000001 PM 8243163 ER PT J AU PHUOC, TX MATHUR, MP EKMANN, JM DURBETAKI, P AF PHUOC, TX MATHUR, MP EKMANN, JM DURBETAKI, P TI HIGH-ENERGY ND-YAG LASER IGNITION OF COALS - MODELING ANALYSIS SO COMBUSTION AND FLAME LA English DT Article ID RADIATION; FUEL; ABSORPTION; PYROLYSIS; PARTICLES AB A modeling analysis of laser-induced ignition of coals is presented. The model is one dimensional, transient, and incorporates the following: the surface ignition reaction, the in-depth pyrolysis, the gas-phase absorption of the laser radiation and by the pyrolysis products, and the gas-phase chemical reaction. The solution is obtained numerically using the method of lines. The results confirm that the pyrolysis products absorb a significant amount of the laser radiation. This important mechanism dictates complicated interactions among different processes including heat and mass transfer and chemical reactions. It was found that, for laser energy fluxes ranging from 2500 to 7000 W/cm2, the ignition of lignite and subituminous coals occurred first at the surface which was then followed by the ignition of the pyrolysis products in the gas-phase region. However, for bituminous coal, only single gas-phase ignition mode was predicted by the model. The model also predicts the rapid decrease of both the surface ignition time and the gas-phase ignition time with increasing laser energy fluxes. In general, a good agreement between predictions and experiments is obtained. A sensitivity analysis, where the kinetic parameters and initial laser energy fluxes were varied over a wide range, was also carried out. This analysis establishes an upper limit for I0, E(c), E(p), and a lower limit for E(g). Within these limits, the laser-induced ignition of coals appears as an integration of two consecutive ipition modes: a surface ignition mode followed by the gas-phase ignition mode. Beyond these limits, a single gas-phase ignition mode is the only ignition mode that prevails. C1 GEORGIA INST TECHNOL,SCH MECH ENGN,ATLANTA,GA 30332. RP PHUOC, TX (reprint author), US DOE,PITTSBURGH ENERGY TECHNOL CTR,PITTSBURGH,PA 15236, USA. NR 16 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0010-2180 J9 COMBUST FLAME JI Combust. Flame PD SEP PY 1993 VL 94 IS 4 BP 349 EP 362 DI 10.1016/0010-2180(93)90119-N PG 14 WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical SC Thermodynamics; Energy & Fuels; Engineering GA LU240 UT WOS:A1993LU24000002 ER PT J AU JOHNSON, JL MONTICELLO, DA REIMAN, AH SALAS, A FRAGUAS, AL HIRSHMAN, SP AF JOHNSON, JL MONTICELLO, DA REIMAN, AH SALAS, A FRAGUAS, AL HIRSHMAN, SP TI COMPARISON OF ATF AND TJ-II STELLARATOR EQUILIBRIA AS COMPUTED BY THE 3-D VMEC AND PIES CODES SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article AB A comparison is made of results from the PIES code, which determines the equilibrium properties of three-dimensional toroidal configurations by direct integration along the magnetic field lines, with those from the VMEC code, which uses an energy minimization in a flux representation to determine the equilibrium configuration, for two devices: the ATF stellarator at Oak Ridge and the TJ-II heliac which is being built in Madrid. The results obtained from the two codes are in good agreement, providing additional validation for the codes. C1 ASOCIAC EURATOM, CIEMAT FUS, MADRID, SPAIN. OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. RP JOHNSON, JL (reprint author), PRINCETON UNIV, PRINCETON PLASMA PHYS LAB, PRINCETON, NJ 08543 USA. RI Lopez-Fraguas, Antonio/L-8104-2014 OI Lopez-Fraguas, Antonio/0000-0002-0277-8137 NR 4 TC 7 Z9 7 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0010-4655 EI 1879-2944 J9 COMPUT PHYS COMMUN JI Comput. Phys. Commun. PD SEP PY 1993 VL 77 IS 1 BP 1 EP 10 DI 10.1016/0010-4655(93)90031-7 PG 10 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LW073 UT WOS:A1993LW07300001 ER PT J AU DIPESO, G HEWETT, DW LARSON, DJ AF DIPESO, G HEWETT, DW LARSON, DJ TI THE USE OF BLOCK TRIDIAGONAL METHODS TO IMPROVE CONVERGENCE OF DADI SOLUTIONS TO COUPLED ELLIPTIC PARTIAL-DIFFERENTIAL EQUATIONS SO COMPUTER PHYSICS COMMUNICATIONS LA English DT Article AB A new solution method for coupled sets of elliptic equations, Coupled Equation Dynamic Alternating Direction Implicit (CEDADI), was recently developed for solution of the Streamlined Darwin Field (SDF) model and shows promise for other applications. In the SDF simulations of plasmas, CEDADI has been shown to dramatically reduce the required CPU time to achieve a chosen residual. In these simulations, the coupling between the equations was very strong. For intermediate equation coupling which will occur in general sets of coupled elliptic equations, the method slows considerably. We will show that the problem is corrected by time centering both second and first-order derivatives. The iteration count is then reduced by a factor of 8 for the intermediate coupling case. The new time centering requires a block tridiagonal inversion in each direction instead of the previously used tridiagonal inversion. Despite the fact that the new method takes more CPU time per iteration compared to the old method, an overall factor of 6.28 reduction in CPU time is then gained for this case. Reduction in CPU time is obtained for cases over a wide range of coupling parameters. C1 LAWRENCE LIVERMORE NATL LAB,DIV X,LIVERMORE,CA 94550. RP HEWETT, DW (reprint author), LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,LIVERMORE,CA 94550, USA. OI Larson, David/0000-0003-0814-8555 NR 11 TC 2 Z9 2 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 SEP PY 1993 VL 77 IS 1 BP 33 EP 45 DI 10.1016/0010-4655(93)90034-A PG 13 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LW073 UT WOS:A1993LW07300004 ER PT J AU KHALEEL, MA ITANI, RY AF KHALEEL, MA ITANI, RY TI SAFETY EVALUATION OF EXISTING PARTIALLY PRESTRESSED CONCRETE GIRDER BRIDGES SO COMPUTERS & STRUCTURES LA English DT Article AB An efficient method for evaluating the safety of existing girder bridges as a function of the load and resistance parameters is presented. The bridge capacity is determined using a nonlinear finite element program in terms of the truck load which is increased until structure collapse occurs. It is determined that the reliability of fully prestressed bridges is higher than that of partially prestressed bridges, with the bridge system reliability is one-and-half to two times the girder reliability index. It is also found that the system reliability is more senstive to accidental or local damage of the exterior girders than the interior ones. C1 WASHINGTON STATE UNIV, DEPT CIVIL & ENVIRONM ENGN, PULLMAN, WA 99164 USA. RP KHALEEL, MA (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. OI khaleel, mohammad/0000-0001-7048-0749 NR 16 TC 1 Z9 1 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0045-7949 J9 COMPUT STRUCT JI Comput. Struct. PD SEP PY 1993 VL 48 IS 5 BP 763 EP 771 DI 10.1016/0045-7949(93)90498-3 PG 9 WC Computer Science, Interdisciplinary Applications; Engineering, Civil SC Computer Science; Engineering GA ME126 UT WOS:A1993ME12600002 ER PT J AU DU, JY KLEINHANS, FW MAZUR, P CRITSER, JK AF DU, JY KLEINHANS, FW MAZUR, P CRITSER, JK TI OSMOTIC BEHAVIOR OF HUMAN SPERMATOZOA STUDIED BY EPR SO CRYO-LETTERS LA English DT Article DE HUMAN SPERMATOZOA; BOYLE-VANTHOFF; EPR; OSMOTIC WATER; MICROVISCOSITY; SPIN LABEL ID SPIN LABELS; REDUCTION; VISCOSITY; EMBRYOS; SPERM AB The osmotic volume response of human spermatozoa was determined using a method that is independent of cell shape, namely, an electron paramagnetic resonance (EPR) technique. The results yield a Boyle van't Hoff plot which is linear in the range 250 to 1500 milliosmolal (mOsm) of sodium chloride (r2 = 0.996). Thirteen percent of the isotonic water was found to be osmotically inactive. C1 METHODIST HOSP INDIANA,CRYOBIOL RES INST,INDIANAPOLIS,IN 46202. INDIANA UNIV PURDUE UNIV,DEPT PHYS,INDIANAPOLIS,IN 46202. OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831. INDIANA UNIV,SCH MED,DEPT PHYSIOL & BIOPHYS,INDIANAPOLIS,IN 46202. INDIANA UNIV,SCH MED,DEPT OBSTET & GYNECOL,INDIANAPOLIS,IN 46202. NR 20 TC 16 Z9 16 U1 0 U2 0 PU CRYO LETTERS PI CAMBRIDGE PA 7 WOOTTON WAY, CAMBRIDGE, CAMBS, ENGLAND CB3 9LX SN 0143-2044 J9 CRYO-LETT JI Cryo-Lett. PD SEP-OCT PY 1993 VL 14 IS 5 BP 285 EP 294 PG 10 WC Biology; Physiology SC Life Sciences & Biomedicine - Other Topics; Physiology GA LY811 UT WOS:A1993LY81100005 ER PT J AU DRESNER, L AF DRESNER, L TI THERMOMECHANICAL FLOW OF HE-II THROUGH POROUS BODIES SO CRYOGENICS LA English DT Article DE THERMOMECHANICAL FLOW; HELIUM; POROUS BODIES AB The thermomechanical flow of He II through a porous body has been studied by means of a variational principle. For a given porosity, the flow is a maximum for uniform pores. For actual pores the flow is always less, the reduction being primarily determined by the constriction at bottle-necks. It is shown that the thermomechanical mass flow of He II can be inferred from a measurement at room temperature of the electric current flow through the interstices of the porous body when they are filled with a conducting medium. RP DRESNER, L (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 5 TC 2 Z9 2 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 SEP PY 1993 VL 33 IS 9 BP 842 EP 845 DI 10.1016/0011-2275(93)90096-7 PG 4 WC Thermodynamics; Physics, Applied SC Thermodynamics; Physics GA LT003 UT WOS:A1993LT00300001 ER PT J AU DRESNER, L AF DRESNER, L TI STABILITY AND PROTECTION OF AG/BSCCO MAGNETS OPERATED IN THE 20-40-K RANGE SO CRYOGENICS LA English DT Article DE SUPERCONDUCTING MAGNETS; MAGNETIC STABILITY; AG/BSCCO COMPOSITES AB The rate of growth of normal zones has been calculated for Ag/BSCCO composites operated in the 20-40 K range. Formulae are presented for the propagation velocity and for the normal zone voltage as a function of the hot spot temperature. These formulae take into account the strong temperature dependence of the specific heats of silver and BSCCO, as well as the temperature dependences of the thermal conductivity and resistivity of silver. In spite of very slow propagation (of the order of 1 cm s-1), normal zone voltages seem adequate to allow the detection of normal zones before the conductor overheats. Finally, a formula for estimating the minimum quench energy is proposed. Estimates based on this formula indicate that potted magnets wound with Ag/BSCCO conductors should not train. RP DRESNER, L (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA. NR 15 TC 38 Z9 38 U1 1 U2 2 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 SEP PY 1993 VL 33 IS 9 BP 900 EP 909 DI 10.1016/0011-2275(93)90104-V PG 10 WC Thermodynamics; Physics, Applied SC Thermodynamics; Physics GA LT003 UT WOS:A1993LT00300009 ER PT J AU ROSENTHAL, DH EDMONDS, JA RICHARDS, KR WISE, MA AF ROSENTHAL, DH EDMONDS, JA RICHARDS, KR WISE, MA TI STABILIZING UNITED-STATES NET CARBON EMISSIONS BY PLANTING TREES SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article; Proceedings Paper CT SYMP ON CARBON DIOXIDE DISPOSAL CY MAR 29-31, 1993 CL OXFORD, ENGLAND SP INT ENERGY AGCY, COMMISS EUROPEAN COMMUNITIES, POWERGEN, NATL COAL ASSOC, ELECT POWER DEV CO JAPAN, SHELL INT PETR, PERGAMON PRESS, FOSTER LOHEELER ENERGY DE CARBON EMISSIONS; CARBON SEQUESTRATION; TREES; GLOBAL WARMING; ECONOMICS; ENERGY AB This study investigates bow much the costs of stabilizing net carbon emissions in the United States at 1990 levels between 1990 and 2030 can be reduced by using trees to sequester carbon. Using the Fossil2 energy/economic model maintained by the U.S. Department of Energy, we estimate that trees can reduce the overall costs of stabilizing net carbon emissions by as much as 80 percent. More work is needed to verify the magnitude of the cost reduction. RP ROSENTHAL, DH (reprint author), US DOE,WASHINGTON,DC 20085, USA. NR 0 TC 5 Z9 5 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD SEP-NOV PY 1993 VL 34 IS 9-11 BP 881 EP 887 DI 10.1016/0196-8904(93)90032-6 PG 7 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA LN670 UT WOS:A1993LN67000022 ER PT J AU RICHARDS, KR MOULTON, RJ BIRDSEY, RA AF RICHARDS, KR MOULTON, RJ BIRDSEY, RA TI COSTS OF CREATING CARBON SINKS IN THE UNITED-STATES SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article; Proceedings Paper CT SYMP ON CARBON DIOXIDE DISPOSAL CY MAR 29-31, 1993 CL OXFORD, ENGLAND SP INT ENERGY AGCY, COMMISS EUROPEAN COMMUNITIES, POWERGEN, NATL COAL ASSOC, ELECT POWER DEV CO JAPAN, SHELL INT PETR, PERGAMON PRESS, FOSTER LOHEELER ENERGY DE CARBON DIOXIDE; SEQUESTRATION; FORESTRY; COST ANALYSIS; AGRICULTURE AB New models of the dynamic patterns of carbon uptake by forest ecosystems allow improvements in the estimation of the costs of carbon sequestration in the U.S. The preliminary results of an effort to update an earlier study indicate that conversion of environmentally sensitive and economically marginal cropland and pastureland in the U.S. could offset as much as 25% of current U.S. emissions at costs of $US 8-60 per short ton. RP RICHARDS, KR (reprint author), PACIFIC NW LAB, 901 D ST SW, SUITE 900, WASHINGTON, DC 20024 USA. NR 0 TC 34 Z9 38 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD SEP-NOV PY 1993 VL 34 IS 9-11 BP 905 EP 912 DI 10.1016/0196-8904(93)90035-9 PG 8 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA LN670 UT WOS:A1993LN67000025 ER PT J AU BROWN, LM ZEILER, KG AF BROWN, LM ZEILER, KG TI AQUATIC BIOMASS AND CARBON-DIOXIDE TRAPPING SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article; Proceedings Paper CT SYMP ON CARBON DIOXIDE DISPOSAL CY MAR 29-31, 1993 CL OXFORD, ENGLAND SP INT ENERGY AGCY, COMMISS EUROPEAN COMMUNITIES, POWERGEN, NATL COAL ASSOC, ELECT POWER DEV CO JAPAN, SHELL INT PETR, PERGAMON PRESS, FOSTER LOHEELER ENERGY AB The technology for growing microalgae as a renewable biomass source can be applied to the production of a diesel fuel substitute (biodiesel). Microalgae are of interest because of their high growth rates and tolerance to varying environmental conditions, and because the oils (lipids) they produce can be extracted and converted to substitute petroleum fuels. Projected global climate change provides a second important rationale for this approach. Climate change has been linked to the accumulation of excess carbon dioxide in the atmosphere. The burning of fossil fuels in power plants is the primary contributor to excess carbon dioxide. Inasmuch as the primary nutrient for microalgal growth is carbon dioxide, operation of microalgal biomass farms has emerged as a promising candidate in the search for alternative approaches to ameliorate global climate change. The production of diesel fuel by microalgae requires very large quantities of carbon dioxide as a nutrient. In areas where microalgae fuel farms operate in tandem with fossil fuel plants to scrub carbon dioxide from flue gases, the release of carbon dioxide could be significantly reduced. If the microalgae are used to produce fuel, a mass culture facility reduces by approximately 50% the carbon dioxide emissions from the power plant per million Btu delivered. For example, although coal is ordinarily considered to be the most polluting fossil fuel on the basis of carbon dioxide emitted per amount of energy produced, the incorporation of microalgal ponds with a coal-fired plant would make this fossil fuel less polluting than existing oil- and natural-gas-fired plants. Similar advantages can be achieved for oil- and gas-fired plants. If commodity chemicals are produced from algae instead of fuels, the net carbon dioxide reduction is significantly greater. Commodity chemicals can be used to produce goods with long-term uses such as building materials. Such uses would result in the sequestering of carbon dioxide for long periods. Of the photosynthetic organisms, microalgae are the most productive carbon dioxide users and can fix greater amounts of carbon dioxide per land area than higher plants. Also, maximum productivities of higher plants and trees are restricted to areas with prime soil, water, and climate (primarily the tropics). Plant leaves exist in an aerial environment and are subject to large evaporative moisture losses, which directly inhibit the process of photosynthesis (carbon dioxide uptake). Microalgae in mass culture are not subject to such photosynthetic inhibition because the water content of the culture can be controlled by proper engineering, and saline water can be used if necessary. This difference is the basis for the several-fold higher carbon dioxide absorption capacity of microalgae compared to plants. Initial application of this technology is envisioned for the Desert Southwest of the United States because this area provides high solar radiation and offers flat land that has few competing uses (hence low land costs). Also, there are large saline aquifers with few, competing uses in the region. These could provide a suitable, low-cost culture, medium for the growth of many species of microalgae. RP BROWN, LM (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 0 TC 58 Z9 61 U1 5 U2 23 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD SEP-NOV PY 1993 VL 34 IS 9-11 BP 1005 EP 1013 DI 10.1016/0196-8904(93)90048-F PG 9 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA LN670 UT WOS:A1993LN67000038 ER PT J AU STEINBERG, M DONG, Y BORGWARDT, RH AF STEINBERG, M DONG, Y BORGWARDT, RH TI THE COPROCESSING OF FOSSIL-FUELS AND BIOMASS FOR CO2 EMISSION REDUCTION IN THE TRANSPORTATION SECTOR SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article; Proceedings Paper CT SYMP ON CARBON DIOXIDE DISPOSAL CY MAR 29-31, 1993 CL OXFORD, ENGLAND SP INT ENERGY AGCY, COMMISS EUROPEAN COMMUNITIES, POWERGEN, NATL COAL ASSOC, ELECT POWER DEV CO JAPAN, SHELL INT PETR, PERGAMON PRESS, FOSTER LOHEELER ENERGY DE HYDROCARB; BIOMASS; METHANOL; TRANSPORTATION; ALTERNATIVE FUEL AB Conversion of biomass to alcohol for displacement of petroleum fuels can effectively mitigate CO2 emissions. Coprocessing biomass with natural gas to produce methanol can maximize the amount of petroleum displaced and minimize mitigation cost. This paper discusses process simulations and reaction rate studies of a biomass gasification process aimed at these goals. RP STEINBERG, M (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD SEP-NOV PY 1993 VL 34 IS 9-11 BP 1015 EP 1022 DI 10.1016/0196-8904(93)90049-G PG 8 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA LN670 UT WOS:A1993LN67000039 ER PT J AU DOCTOR, RD MOLBURG, JC THIMMAPURAM, P BERRY, GF LIVENGOOD, CD JOHNSON, RA AF DOCTOR, RD MOLBURG, JC THIMMAPURAM, P BERRY, GF LIVENGOOD, CD JOHNSON, RA TI GASIFICATION COMBINED-CYCLE - CARBON-DIOXIDE RECOVERY, TRANSPORT, AND DISPOSAL SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article; Proceedings Paper CT SYMP ON CARBON DIOXIDE DISPOSAL CY MAR 29-31, 1993 CL OXFORD, ENGLAND SP INT ENERGY AGCY, COMMISS EUROPEAN COMMUNITIES, POWERGEN, NATL COAL ASSOC, ELECT POWER DEV CO JAPAN, SHELL INT PETR, PERGAMON PRESS, FOSTER LOHEELER ENERGY DE CO2 EMISSIONS; POWER PRODUCTION; COAL GASIFICATION; INTEGRATED GASIFICATION COMBINED-CYCLE; CO2 REMOVAL; CO2 TRANSPORT; CO2 SEQUESTERING AB Initiatives to limit carbon dioxide (CO2) emissions have drawn considerable interest to integrated gasification combined-cycle (IGCC) power generation. With its higher efficiency, this process can reduce CO2 production. It is also amenable to CO2 capture, because CO2 can be removed before combustion and the associated dilution with atmospheric nitrogen. This paper presents a process-design baseline that encompasses the IGCC system, CO2 transport by pipeline, and land-based sequestering of CO2 in geological reservoirs. The intent of this study is to provide the CO2 budget, or an ''equivalent CO2'' budget, associated with each of the individual energy-cycle steps. Design capital and operating costs for the process are included in the full study but are not reported in the present paper. The value used for the ''equivalent CO2'' budget will be 1 kg CO2/kWhe. The base case is a 470-MW (at the busbar) IGCC system using an air-blown Kellogg Rust Westinghouse (KRW) agglomerating fluidized bed gasifier, U.S. Illinois #6 bituminous coal feed, and in-bed sulfur removal. Mining, feed preparation, and conversion result in a net electric power production of 461 MW, with a 0.830 kg/kWh(e) CO2 release rate. In the CO2 recovery case, the gasifier output is taken through water-gas shift and then to Selexol, a glycol-based absorber-stripper process that recovers CO2 before it enters the combustion turbine. This process results in 350 MW at the busbar. A 500-km pipeline takes the recovered CO2 to geological sequestering. The net electric power production in the recovery case is 320 MW, with a 0.234 kg/kWh(e) CO2 release rate. RP DOCTOR, RD (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 0 TC 11 Z9 11 U1 1 U2 8 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD SEP-NOV PY 1993 VL 34 IS 9-11 BP 1113 EP 1120 DI 10.1016/0196-8904(93)90060-N PG 8 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA LN670 UT WOS:A1993LN67000050 ER PT J AU WINTER, EM BERGMAN, PD AF WINTER, EM BERGMAN, PD TI AVAILABILITY OF DEPLETED OIL AND GAS-RESERVOIRS FOR DISPOSAL OF CARBON-DIOXIDE IN THE UNITED-STATES SO ENERGY CONVERSION AND MANAGEMENT LA English DT Article; Proceedings Paper CT SYMP ON CARBON DIOXIDE DISPOSAL CY MAR 29-31, 1993 CL OXFORD, ENGLAND SP INT ENERGY AGCY, COMMISS EUROPEAN COMMUNITIES, POWERGEN, NATL COAL ASSOC, ELECT POWER DEV CO JAPAN, SHELL INT PETR, PERGAMON PRESS, FOSTER LOHEELER ENERGY DE CARBON DIOXIDE; CARBON DIOXIDE STORAGE; PETROLEUM NATURAL GAS RESERVOIRS; DEPLETED RESERVOIRS; STORAGE CAPACITY AB Information on the location and size of depleted oil and natural gas reservoirs in the United States was extracted from a Petroleum Information, Inc., database. The locations of and CO2 emissions from power plants were also determined. The total volume available for disposal of carbon dioxide (CO2) is small compared to annual CO2 emissions. If all of the nation's power plant CO2 emissions were to be injected into depleted reservoirs, the reservoirs would be filled in about 1.5 years. Over half of the CO2 is emitted east of the Mississippi River, and most of the potential disposal sites are west of the Mississippi, thus creating additional problems. The years remaining before individual producing reservoirs will be exhausted and available for disposal is an important factor in evaluating the attractiveness and cost of this disposal option. RP WINTER, EM (reprint author), US DOE,PITTSBURGH ENERGY TECHNOL CTR,POB 10940,PITTSBURGH,PA 15236, USA. NR 0 TC 31 Z9 32 U1 1 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0196-8904 J9 ENERG CONVERS MANAGE JI Energy Conv. Manag. PD SEP-NOV PY 1993 VL 34 IS 9-11 BP 1177 EP 1187 DI 10.1016/0196-8904(93)90067-K PG 11 WC Thermodynamics; Energy & Fuels; Mechanics SC Thermodynamics; Energy & Fuels; Mechanics GA LN670 UT WOS:A1993LN67000057 ER PT J AU KLAVETTER, EA MARTIN, SJ WESSENDORF, KO AF KLAVETTER, EA MARTIN, SJ WESSENDORF, KO TI MONITORING JET FUEL THERMAL-STABILITY USING A QUARTZ-CRYSTAL MICROBALANCE SO ENERGY & FUELS LA English DT Article ID LIQUID; MASS; FREQUENCY AB Thermal stability studies of aviation fuels are hindered by the inadequacy of current instrumentation in providing quantitative, in situ measurements of the rates of solid deposition on contacted surfaces. This paper reports the development of a test system that utilizes a quartz crystal microbalance to make in situ measurements of minute amounts of solids that deposit on the quartz crystal when a liquid fuel is thermally degraded. The quartz crystal microbalance jet fuel test system (QCM-JFTS) was developed in response to a need for quantitative information at temperature conditions representative of actual aviation fuel systems with which to develop mathematical models for predicting fuel thermal degradation and solids deposition. This bench-top system has a resolution of better than 0.3 mug/cm2 with good reproducibility and accuracy. Data on deposition rates in the temperature range of 125-200-degrees-C are obtained on three aviation fuels and simple global Arrhenius-type models formulated which demonstrate how the system can be used in model development. Additionally, the system can be used to obtain viscosity-density data on the fuels. Data obtained from the QCM-JFTS on a model hydrocarbon compound and on a Jet A fuel compare favorably with literature values. The data demonstrate the potential for this system to be used in various aspects of aviation fuel thermal stability investigations. RP KLAVETTER, EA (reprint author), SANDIA NATL LABS,PROC RES DEPT,ALBUQUERQUE,NM 87185, USA. NR 17 TC 13 Z9 17 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD SEP-OCT PY 1993 VL 7 IS 5 BP 582 EP 588 DI 10.1021/ef00041a004 PG 7 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LZ244 UT WOS:A1993LZ24400004 ER PT J AU REYNOLDS, JG BURNHAM, AK AF REYNOLDS, JG BURNHAM, AK TI PYROLYSIS KINETICS AND MATURATION OF COALS FROM THE SAN-JUAN BASIN SO ENERGY & FUELS LA English DT Article ID VITRINITE MATURATION; NEW-MEXICO; REFLECTANCE; MODEL; COLORADO; ROCKS AB Temperature-programmed pyrolysis was used to analyze 18 coals and coaly shales from the San Juan Basin of the southwestern U.S., giving temperatures of maximum evolution rate (T(max) and pyrolysis yields. T(max) values increased with maturity (as measured by vitrinite reflectance [%R(m)]). The pyrolysis yields remained constant or increased slightly with increasing maturity until a value for % R(m) of approximately 1.0 was reached, after which the yields declined rapidly. Pyrolysis-gas chromatography and pyrolysis-FTIR showed that alkane and alkene yields followed similar trends. A subgroup of coals from the Fruitland seam of the San Juan Basin was also analyzed by micropyrolysis at several constant heating rates to determine laboratory pyrolysis kinetics. The kinetic calculations yielded the energy of activation by the approximate method (E(approx)) and the principal energy of activation by the discrete method (principal E(discrete)) in the range 55-57 kcal/mol for the coals in the % R(m) range 0.4-0.9. However, the coal with the highest % R(m) (1.30) had E(approx) and principal E(discrete) values around 63 kcal/mol. These Fruitland seam coals were also extracted with organic solvents, and the kinetic parameters were found to be within experimental error of their unextracted counterparts. Application of the multiple parallel reaction model to the kinetic parameters determined for the four Fruitland seam coals showed only fair agreement between calculated and measured values for T(max) and yield relationships with maturity. This inability of the model to adequately describe the measured data is attributed to the pyrolysis mechanism changing with increasing maturity. C1 LAWRENCE LIVERMORE NATL LAB,LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. NR 19 TC 25 Z9 26 U1 1 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD SEP-OCT PY 1993 VL 7 IS 5 BP 610 EP 619 DI 10.1021/ef00041a008 PG 10 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LZ244 UT WOS:A1993LZ24400008 ER PT J AU DYRKACZ, GR BLOOMQUIST, CAA RUSCIC, L AF DYRKACZ, GR BLOOMQUIST, CAA RUSCIC, L TI INVESTIGATIONS INTO THE PROCESS OF MACERAL SEPARATION BY CENTRIFUGAL TECHNIQUES .3. CONTINUOUS-FLOW AND SINK FLOAT MACERAL SEPARATION OF 100-MESH COAL SO ENERGY & FUELS LA English DT Article ID MICRONIZED COALS AB Centrifugal sink/float and continuous flow centrifuge separations were conducted on a -100-mesh high-volatile bituminous coal. Using CsCl/Brij-35 as the separation media, float and sink phases could be enriched to greater than 75 % pure phases. This enrichment was less than expected under the separating conditions employed. The reasons for this behavior were not clear. The float and sink phases were monitored by analytical density gradient centrifugation. The gradient was documented by both the standard flow cell method and direct imaging of the density distributions. RP DYRKACZ, GR (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0887-0624 J9 ENERG FUEL JI Energy Fuels PD SEP-OCT PY 1993 VL 7 IS 5 BP 655 EP 660 DI 10.1021/ef00041a015 PG 6 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LZ244 UT WOS:A1993LZ24400015 ER PT J AU CURLEE, TR AF CURLEE, TR TI HISTORICAL RESPONSES TO ENVIRONMENTAL EXTERNALITIES IN ELECTRIC-POWER SO ENERGY POLICY LA English DT Article DE ENVIRONMENTAL EXTERNALITIES; ELECTRICITY; USA AB This paper argues that policies in the USA to internalize environmental externalities from coal fired power plants have been linked to the evolution of our conceptual understanding of externalities and how externalities can be internalized. Government policies are divided into three periods: before the passage of the National Environmental Policy Act (NEPA) in 1969, between the passage of NEPA and actions in 1989 by the State of New York's Public Service Commission to include environmental externalities in integrated planning; and from 1989 to the present, which includes various state actions to explicitly include environmental costs in decision making, and the marketable emission allowances included in the 1990 Clean Air Act. The positions of economists, policy makers, and the general public have tended to converge over time to reach the current acceptance of, if not preference for, economic incentives as alternatives to command and control regulations. In recent years economists have moved from their strict emphasis on economic efficiency to questions of equity and implementation. At the same time policy makers, disciplines other than economics and the general public have come to appreciate the cost saving aspects of economic incentives. Future responses to environmental externalities in electric power will depend on the abilities of economists to accurately evaluate and communicate the pros and cons associated with economic incentives and on the willingness of policy makers and the general public to appreciate the benefits, as well as tolerate the compromises, that a move to a market based system will entail. RP CURLEE, TR (reprint author), OAK RIDGE NATL LAB,DIV ENERGY,BLDG 4500-N,MS 6205,POB 2008,OAK RIDGE,TN 37831, USA. NR 16 TC 3 Z9 3 U1 2 U2 4 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD SEP PY 1993 VL 21 IS 9 BP 926 EP 936 PG 11 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA LX976 UT WOS:A1993LX97600003 ER PT J AU KOOMEY, JG OEY, T BERGMAN, E AF KOOMEY, JG OEY, T BERGMAN, E TI THE ECONOMICS OF CYCLING PERSONAL COMPUTERS SO ENERGY POLICY LA English DT Article DE ECONOMICS; CYCLING; PERSONAL COMPUTERS AB This paper explores the economics of turning off (cycling) a personal computer (PC). First, it explores the costs and benefits for turning off the hardware, and describes them in simple equations. Next, it combines typical office worker salaries and typical energy usage for PCs to determine how much worker time can be spent on computer cycling for this action to be economically justified. Finally, the paper shows that the value of workers' salaries makes improvements in hardware efficiency and automatic monitor shutdown (using techniques now common in laptop computers) relatively more attractive than programmes to modify office workers' behaviour. C1 APPLE COMP INC,CUPERTINO,CA 95014. SUN MICROSYST INC,BILLERICA,MA 01821. RP KOOMEY, JG (reprint author), LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,ENERGY ANAL PROGRAM,BERKELEY,CA 94720, USA. NR 7 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 0301-4215 J9 ENERG POLICY JI Energy Policy PD SEP PY 1993 VL 21 IS 9 BP 937 EP 943 DI 10.1016/0301-4215(93)90181-E PG 7 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA LX976 UT WOS:A1993LX97600004 ER PT J AU SCHIPPER, L MARTINOT, E AF SCHIPPER, L MARTINOT, E TI DECLINE AND REBIRTH - ENERGY DEMAND IN THE FORMER USSR SO ENERGY POLICY LA English DT Article DE ENERGY DEMAND; FORMER USSR; FORECAST ID EFFICIENCY AB Using a detailed, bottom up model of the demand for energy in the former USSR, we build scenarios of energy use there in 1995 and 2010. This paper reports on our results for 1995. Assuming 18% decline in the 1995 GDP, compared with 1985, we foresee a decline in final energy use of 22% and that for primary energy consumption of about 20%. From how our individual fuels and end uses are coupled, we suggest that oil demand will fall a greater amount by 1995. RP SCHIPPER, L (reprint author), LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,ENERGY ANAL PROGRAM,INT ENERGY STUDIES GRP,BERKELEY,CA 94720, USA. NR 8 TC 3 Z9 3 U1 1 U2 1 PU BUTTERWORTH-HEINEMANN LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, OXON, ENGLAND OX5 1GB SN 0301-4215 J9 ENERG POLICY JI Energy Policy PD SEP PY 1993 VL 21 IS 9 BP 969 EP 977 DI 10.1016/0301-4215(93)90185-I PG 9 WC Energy & Fuels; Environmental Sciences; Environmental Studies SC Energy & Fuels; Environmental Sciences & Ecology GA LX976 UT WOS:A1993LX97600008 ER PT J AU FREDRICKSON, JK BOLTON, H BROCKMAN, FJ AF FREDRICKSON, JK BOLTON, H BROCKMAN, FJ TI IN-SITU AND ON-SITE BIORECLAMATION SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article RP FREDRICKSON, JK (reprint author), PACIFIC NW LAB, ENVIRONM MICROBIOL GRP, RICHLAND, WA 99352 USA. RI Bolton, Harvey/E-5583-2011 NR 0 TC 9 Z9 17 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD SEP PY 1993 VL 27 IS 9 BP 1711 EP 1716 PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LW249 UT WOS:A1993LW24900004 ER PT J AU PRAIRIE, MR EVANS, LR STANGE, BM MARTINEZ, SL AF PRAIRIE, MR EVANS, LR STANGE, BM MARTINEZ, SL TI AN INVESTIGATION OF TIO2 PHOTOCATALYSIS FOR THE TREATMENT OF WATER CONTAMINATED WITH METALS AND ORGANIC-CHEMICALS SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID TITANIUM-DIOXIDE; HETEROGENEOUS PHOTOCATALYSIS; AQUEOUS SUSPENSIONS; PLATINUM DEPOSITION; POWDER; DEGRADATION; DISPERSIONS; REDUCTION; KINETICS; SILVER AB Laboratory experiments were performed to investigate TiO2 photocatalysis for treating water contaminated with dissolved metals (Ag, Au, Cd, Cr, Cu, Hg, Ni, and Pt) and a variety of organics (e.g., methanol, formic acid, salicylic acid, EDTA, phenol,and nitrobenzene). It was found that only those metals with half-reaction standard reduction potentials more positive than 0.3 V (vs normal hydrogen electrode) can be treated using TiO2 as the photocatalyst. Kinetic data illustrating the synergism between oxidation and reduction are presented. Experiments using singly substituted benzenes as electron donors show that the rate of reduction of Cr(VI) is correlated with Hammett sigma constants. Photoefficiencies approaching 85% were measured for the conversion of Cr(VI) to Cr(III) using citric acid as the reductant. In contrast, photoefficiency was only 4% when oxidizing salicylic acid using O2 as the oxidant. It is concluded that efficient designs of photocatalytic systems for wastewater treatment must take into account both oxidation and reduction processes. RP PRAIRIE, MR (reprint author), SANDIA NATL LABS, CTR ADV ENERGY TECHNOL, ALBUQUERQUE, NM 87185 USA. NR 50 TC 259 Z9 267 U1 8 U2 97 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD SEP PY 1993 VL 27 IS 9 BP 1776 EP 1782 DI 10.1021/es00046a003 PG 7 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LW249 UT WOS:A1993LW24900014 ER PT J AU LIANG, LY MCNABB, JA PAULK, JM GU, BH MCCARTHY, JF AF LIANG, LY MCNABB, JA PAULK, JM GU, BH MCCARTHY, JF TI KINETICS OF FE(II) OXYGENATION AT LOW PARTIAL-PRESSURE OF OXYGEN IN THE PRESENCE OF NATURAL ORGANIC-MATTER SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID NEUTRAL SOLUTIONS; HUMIC SUBSTANCES; FERROUS IRON; WATER; LAKE; ADSORPTION; OXIDATION; SORPTION; OXIDES AB Rates of Fe(II) oxidation were measured in aqueous solutions of neutral pH, with partial pressure of oxygen (p(O2)) at 0.005, 0.02, 0.20 atm. The effects of natural organic matter (NOM), fulvic acid (FA), and polyglutamate on Fe(II) oxidation were investigated. At p(O2) of 0.2 atm, NOM had little effect on the rate of Fe(II) oxidation. The rate exhibited first-order behavior with respect to Fe(II) concentration, and the oxidation half-time (t1/2) was about 20 min. However, at low p(O2) (0.005 atm), the oxidation rate showed an apparent zero-order behavior, with t1/2 of 40 h. Organic compounds (NOM, polyglutamate, and FA) enhanced the oxidation reaction. The half time, t1/2, shortened to 8 h in the presence of 2.0 mg L-1 of NOM. This finding was in contrast to the limited effect of NOM on Fe(II) oxidation at high p(O2). It is interpreted by considering oxidation through two pathways: oxidation of FeOH+ and oxidation of Fe(II)-organic complexes, with Fe(II)-organic complexes being the more reactive species. RP LIANG, LY (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. RI Gu, Baohua/B-9511-2012; Liang, Liyuan/O-7213-2014 OI Gu, Baohua/0000-0002-7299-2956; Liang, Liyuan/0000-0003-1338-0324 NR 32 TC 70 Z9 72 U1 3 U2 22 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD SEP PY 1993 VL 27 IS 9 BP 1864 EP 1870 DI 10.1021/es00046a014 PG 7 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LW249 UT WOS:A1993LW24900025 ER PT J AU GAFFNEY, JS MARLEY, NA PRESTBO, EW AF GAFFNEY, JS MARLEY, NA PRESTBO, EW TI MEASUREMENTS OF PEROXYACETYL NITRATE AT A REMOTE SITE IN THE SOUTHWESTERN UNITED-STATES - TROPOSPHERIC IMPLICATIONS SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Article ID HIGH-LATITUDES; GAS-PHASE; PAN; NITROGEN; OZONE; NOX; TEMPERATURE; STABILITY; RADICALS AB Peroxyacetyl nitrate (PAN) measurements were taken at a remote site in the southwestern United States from October 1987 through January 1989 by using an automated gas chromatograph with electron capture detection. The monthly mean PAN concentrations were found to correlate well with temperature, as PAN levels were higher in the colder periods, consistent with PAN's thermochemical stability. PAN values ranged from below detection limits of 0.030-1.91 ppbv (parts per billion by volume) during this period. During the same period ozone levels were 8-77 ppbv. Monthly mean PAN levels were observed to be inversely correlated with monthly mean ozone levels. These data are discussed with regard to the known thermochemical reactions of PAN and the regional tropospheric implications for the formation of peroxyacetic acid and organic peroxides. In addition, these data are evaluated with regard to PAN contributions as a trace greenhouse gas. C1 UNIV WASHINGTON,DEPT CHEM,SEATTLE,WA 98195. RP GAFFNEY, JS (reprint author), ARGONNE NATL LAB,DIV ENVIRONM RES,ARGONNE,IL 60439, USA. NR 25 TC 23 Z9 24 U1 1 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD SEP PY 1993 VL 27 IS 9 BP 1905 EP 1910 DI 10.1021/es00046a020 PG 6 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LW249 UT WOS:A1993LW24900031 ER PT J AU BRUSSEAU, ML ZACHARA, JM AF BRUSSEAU, ML ZACHARA, JM TI TRANSPORT OF CO2+ IN A PHYSICALLY AND CHEMICALLY HETEROGENEOUS POROUS-MEDIUM SO ENVIRONMENTAL SCIENCE & TECHNOLOGY LA English DT Note ID MANGANESE; SORPTION C1 UNIV ARIZONA, DEPT HYDROL & WATER RESOURCES, TUCSON, AZ 85721 USA. PACIFIC NW LAB, DEPT GEOSCI, RICHLAND, WA 99352 USA. RP BRUSSEAU, ML (reprint author), UNIV ARIZONA, DEPT SOIL & WATER SCI, TUCSON, AZ 85721 USA. NR 9 TC 19 Z9 19 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0013-936X J9 ENVIRON SCI TECHNOL JI Environ. Sci. Technol. PD SEP PY 1993 VL 27 IS 9 BP 1937 EP 1939 DI 10.1021/es00046a026 PG 3 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LW249 UT WOS:A1993LW24900037 ER PT J AU SUTER, GW AF SUTER, GW TI A CRITIQUE OF ECOSYSTEM HEALTH CONCEPTS AND INDEXES SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY LA English DT Article DE END POINT; ECOSYSTEM HEALTH; ENVIRONMENTAL HEALTH; INDEXES; INDEX OF BIOTIC INTEGRITY (IBI) ID FISH COMMUNITY-HEALTH; STRESS AB Because people wish to preserve their health and do something equivalent for ecosystems, the metaphor of ecosystem health springs to mind. This paper presents the argument that it is a mistake for environmental scientists to treat this metaphor as reality. First, the metaphor fails because it misrepresents both ecology and health science. Ecosystems are not organisms, so they do not behave like organisms and do not have properties of organisms such as health. Also, health is not an operational concept for physicians or health risk assessors because they must predict, diagnose, and treat specific states called diseases or injuries; they do not calculate indexes of health. Second, attempts to operationally define ecosystem health result in the creation of indexes of heterogeneous variables. Such indexes have no meaning; they cannot be predicted, so they are not applicable to most regulatory problems; they have no diagnostic power; effects on one component are eclipsed by responses of other components; and the reason for a high or low index value is unknown. Their only virtue is that they reduce the complex array of ecosystem responses to various disturbances to one number with a reassuring name. A better alternative is to assess the real array of ecosystem responses so that causes can be diagnosed, future states can be predicted, and benefits of treatments can be compared. RP SUTER, GW (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA. NR 30 TC 185 Z9 196 U1 7 U2 51 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 SEP PY 1993 VL 12 IS 9 BP 1533 EP 1539 DI 10.1897/1552-8618(1993)12[1533:ACOEHC]2.0.CO;2 PG 7 WC Environmental Sciences; Toxicology SC Environmental Sciences & Ecology; Toxicology GA LV354 UT WOS:A1993LV35400003 ER PT J AU TAN, YL KONG, A CHIU, Y AF TAN, YL KONG, A CHIU, Y TI SAMPLE PREPARATION FOR ANALYZING POLYCYCLIC AROMATIC-HYDROCARBONS AND POLYCHLORINATED DIBENZO-P-DIOXINS AND DIBENZOFURANS IN SEDIMENT BY GAS-CHROMATOGRAPHY MASS-SPECTROMETRY SO ESTUARIES LA English DT Article; Proceedings Paper CT Session on Geochemistry of Trace Contaminants and Nutrients, at the 11th International Estuarine Research Conference CY NOV, 1991 CL SAN FRANCISCO, CA ID ENVIRONMENTAL-SAMPLES; LAKES; SEPARATIONS; REGION AB A sample preparation technique was developed to isolate and separate two classes of combustion-produced pollutants: three- to six-ring polycyclic aromatic hydrocarbons (PAH) and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F), from sediment samples for interference-free analyses by gas chromatography/mass spectrometry (GC/MS). The method involves soxhlet extraction with methylene chloride, sulfur removal with activated copper powder, gel filtration chromatography with Sephadex LH-20, polarity separations of PAH and PCDD/F with prepacked silica gel solid-phase extraction columns, and isolation of PCDD/F from polychlorinated biphenyls with microalumina columns. Stringent procedural controls were established to achieve clean isolations and recoveries of 70% or better for each step in the method. The prepared sample extracts were analyzed by capillary GC and GC/MS. Electron impact ionization was used for PAH, and negative chemical ionization with methane as a reagent gas was used for PCDD/F. Reproducible results were obtained. The method is simple and has the advantage of conserving sample consumption since two classes of compounds can be analyzed from the same sample. This can be critical in sediment core analyses where sample size is usually limited. RP TAN, YL (reprint author), US DOE,ENVIRONM MEASUREMENTS LAB,376 HUDSON ST,NEW YORK,NY 10014, USA. NR 23 TC 7 Z9 7 U1 0 U2 2 PU ESTUARINE RES FEDERATION PI LAWRENCE PA PO BOX 368, LAWRENCE, KS 66044 SN 0160-8347 J9 ESTUARIES JI Estuaries PD SEP PY 1993 VL 16 IS 3A BP 427 EP 432 DI 10.2307/1352590 PG 6 WC Environmental Sciences; Marine & Freshwater Biology SC Environmental Sciences & Ecology; Marine & Freshwater Biology GA ML720 UT WOS:A1993ML72000006 ER PT J AU OLSEN, CR LARSEN, IL MULHOLLAND, PJ VONDAMM, KL GREBMEIER, JM SCHAFFNER, LC DIAZ, RJ NICHOLS, MM AF OLSEN, CR LARSEN, IL MULHOLLAND, PJ VONDAMM, KL GREBMEIER, JM SCHAFFNER, LC DIAZ, RJ NICHOLS, MM TI THE CONCEPT OF AN EQUILIBRIUM SURFACE-APPLIED TO PARTICLE SOURCES AND CONTAMINANT DISTRIBUTIONS IN ESTUARINE SEDIMENTS SO ESTUARIES LA English DT Article ID MAN-MADE RADIONUCLIDES; HUDSON RIVER ESTUARY; NEW-YORK; ACCUMULATION; TRANSPORT; METALS; PB-210; ENVIRONMENTS; HYDROCARBONS; CALIFORNIA AB Studies have shown that many chemically-reactive contaminants become associated with fine particles in coastal waters and that the rate, pattern, and extent of contaminant accumulation within estuarine systems are extremely variable. In this paper, we briefly review our findings concerning the accumulation patterns of contaminants in several estuarine systems along the eastern coastline of the United States, and have applied a well-established concept in geology, that is ''an equilibrium profile,'' to explain the observed large variations in these patterns. We show that fine-particle deposition is the most important factor affecting contaminant accumulation in estuarine areas, and that accumulation patterns are governed by physical processes acting to establish or maintain a sediment surface in dynamic equilibrium with respect to sea level, river discharge, tidal currents, and wave activity. Net long-term particle and particle-associated contaminant accumulation are negligible in areas where the sediment surface has attained ''dynamic equilibrium'' with the hydraulic regime. Contaminant accumulation in these areas primarily occurs by the exchange of contaminant-poor sedimentary particles with contaminant-rich suspended particles during physical or biological mixing of the surface sediment. Virtually the entire estuarine particulate and contaminant load bypasses these ''equilibrium'' areas to accumulate at extremely rapid rates in relatively small areas that are temporally out of equilibrium as a result of natural processes or human activities. These relatively small areas serve as major sinks for particles from riverine and marine sources, and for biogenic carbon formed in situ within estuaries or on the inner shelf. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37830. VIRGINIA INST MARINE SCI,GLOUCESTER POINT,VA 23062. RP OLSEN, CR (reprint author), US DOE,OFF HLTH & ENVIRONM RES,WASHINGTON,DC 20585, USA. RI Mulholland, Patrick/C-3142-2012; Grebmeier, Jacqueline/L-9805-2013 OI Grebmeier, Jacqueline/0000-0001-7624-3568 NR 58 TC 50 Z9 50 U1 0 U2 2 PU ESTUARINE RES FEDERATION PI LAWRENCE PA PO BOX 368, LAWRENCE, KS 66044 SN 0160-8347 J9 ESTUARIES JI Estuaries PD SEP PY 1993 VL 16 IS 3B BP 683 EP 696 DI 10.2307/1352805 PG 14 WC Environmental Sciences; Marine & Freshwater Biology SC Environmental Sciences & Ecology; Marine & Freshwater Biology GA ML722 UT WOS:A1993ML72200011 ER PT J AU VERHOEFF, NPLG SOKOLE, EB STABIN, M HENGST, D KUNG, HF VANROYEN, EA JANSSEN, AGM AF VERHOEFF, NPLG SOKOLE, EB STABIN, M HENGST, D KUNG, HF VANROYEN, EA JANSSEN, AGM TI DOSIMETRY OF I-123 IODOBENZAMIDE IN HEALTHY-VOLUNTEERS SO EUROPEAN JOURNAL OF NUCLEAR MEDICINE LA English DT Article DE DOSIMETRY; I-123; RECEPTORS; DOPAMINE; IODOBENZAMIDE ID I-123 IBZM; SPECT; INVITRO; HUMANS AB The distribution of the dopamine D2-receptor specific ligand iodine-123 (S)-(-)-2-hydroxy-3-iodo-6-methoxy-N[(1-ethyl-2-pyrrolidinyl)methyl]-benzamide (I-123-IBZM) was investigated in human adults from whole-body scans, blood samples and urine collected up to 48 h after injection. Results from the present study performed in six healthy volunteers were combined with those of five volunteers from a previous study. Using the brain, liver, lungs and spleen as source organs, the MIRD method was applied to calculate the absorbed radiation dose of the radioligand in various organs. The thyroid (despite blockage), gall-bladder wall, large intestinal walls and spleen received the highest absorbed doses. The average effective dose equivalent of I-123-IBZM for adults was estimated to be 0.034 mSv/MBq. The absorbed dose to the thyroid may be a limiting factor for I-123-IBZM studies in children. C1 OAK RIDGE INST SCI & EDUC,DIV MED SCI,OAK RIDGE,TN. UNIV AMSTERDAM,ACAD MED CTR,DEPT NUCL MED,1105 AZ AMSTERDAM,NETHERLANDS. UNIV AMSTERDAM,ACAD MED CTR,DEPT RADIAT PROTECT,1105 AZ AMSTERDAM,NETHERLANDS. CYGNE BV,EINDHOVEN,NETHERLANDS. UNIV PENN,DIV NUCL MED,PHILADELPHIA,PA 19104. FU FDA HHS [FDA 224-75-3016] NR 20 TC 16 Z9 17 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0340-6997 J9 EUR J NUCL MED JI Eur. J. Nucl. Med. PD SEP PY 1993 VL 20 IS 9 BP 747 EP 752 PG 6 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA LW522 UT WOS:A1993LW52200003 PM 8223767 ER PT J AU Forrest, S Javornik, B Smith, RE Perelson, AS AF Forrest, Stephanie Javornik, Brenda Smith, Robert E. Perelson, Alan S. TI Using Genetic Algorithms to Explore Pattern Recognition in the Immune System SO EVOLUTIONARY COMPUTATION LA English DT Article DE genetic algorithms; immune system; pattern recognition; fitness sharing AB This paper describes an immune system model based on binary strings. The purpose of the model is to study the pattern-recognition processes and learning that take place at both the individual and species levels in the immune system. The genetic algorithm (GA) is a central component of the model. The paper reports simulation experiments on two-pattern-recognition problems that are relevant to natural immune systems. Finally, it reviews the relation between the model and explicit fitness-sharing techniques for genetic algorithms, showing that the immune system model implements a form of implicit fitness sharing. C1 [Forrest, Stephanie; Javornik, Brenda] Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA. [Smith, Robert E.] Univ Alabama, Dept Engn Mech, Tuscaloosa, AL 35487 USA. [Perelson, Alan S.] Univ Calif Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Forrest, S (reprint author), Univ New Mexico, Dept Comp Sci, Albuquerque, NM 87131 USA. EM forrest@cs.unm.edu; javornik@wombat.nexagen.com; rob@comec4.mb.ua.edu; asp@receptor.lanl.gov FU Center for Nonlinear Studies, Los Alamos National Laboratory; Santa Fe Institute; Association of Western Universities, National Science Foundation [IRI-9157644]; Sandia University [AE-1679]; National Institutes of Health [AI28433] FX We thank the Center for Nonlinear Studies, Los Alamos National Laboratory, and the Santa Fe Institute for support. Forrest acknowledges the support of the Association of Western Universities, National Science Foundation (grant IRI-9157644), and Sandia University Research Program (grant AE-1679). Perelson acknowledges the support of the National Institutes of Health (grant AI28433). Lawrence Allen and David Mathews prepared the figures, ran some of the simulations, and made numerous helpful comments on the manuscript. NR 17 TC 116 Z9 136 U1 0 U2 2 PU MIT PRESS PI CAMBRIDGE PA 55 HAYWARD STREET, CAMBRIDGE, MA 02142 USA SN 1063-6560 J9 EVOL COMPUT JI Evol. Comput. PD FAL PY 1993 VL 1 IS 3 BP 191 EP 211 DI 10.1162/evco.1993.1.3.191 PG 21 WC Computer Science, Artificial Intelligence; Computer Science, Theory & Methods SC Computer Science GA V21YR UT WOS:000208243400002 ER PT J AU STAMPFER, MR PAN, CH HOSODA, J BARTHOLOMEW, J MENDELSOHN, J YASWEN, P AF STAMPFER, MR PAN, CH HOSODA, J BARTHOLOMEW, J MENDELSOHN, J YASWEN, P TI BLOCKAGE OF EGF RECEPTOR SIGNAL-TRANSDUCTION CAUSES REVERSIBLE ARREST OF NORMAL AND IMMORTAL HUMAN MAMMARY EPITHELIAL-CELLS WITH SYNCHRONOUS REENTRY INTO THE CELL-CYCLE SO EXPERIMENTAL CELL RESEARCH LA English DT Article ID EPIDERMAL GROWTH-FACTOR; FACTOR-ALPHA; MESSENGER-RNA; FACTOR-BETA; C-MYC; TRANSGENIC MICE; CANCER-CELLS; 3T3 CELLS; TGF-ALPHA; EXPRESSION C1 MEM SLOAN KETTERING CANC CTR,NEW YORK,NY 10021. LAWRENCE BERKELEY LAB,DIV CHEM BIODYNAM,BERKELEY,CA 94720. RP STAMPFER, MR (reprint author), LAWRENCE BERKELEY LAB,DIV LIFE SCI,1 CYCLOTRON RD,BLDG 934,BERKELEY,CA 94720, USA. FU NCI NIH HHS [CA-54247, CA-24844] NR 54 TC 72 Z9 72 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 0014-4827 J9 EXP CELL RES JI Exp. Cell Res. PD SEP PY 1993 VL 208 IS 1 BP 175 EP 188 DI 10.1006/excr.1993.1236 PG 14 WC Oncology; Cell Biology SC Oncology; Cell Biology GA LV612 UT WOS:A1993LV61200021 PM 7689475 ER PT J AU Cox, BL Wang, JSY AF Cox, B. L. Wang, J. S. Y. TI FRACTAL ANALYSES OF ANISOTROPIC FRACTURE SURFACES SO FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY LA English DT Article AB Natural surfaces of rock fractures often have anisotropic asperity distributions, especially for shear fractures or faults. The asperity distributions could be treated as self-affine fractals with directional dependent scaling in the plane of the rock surfaces. Different fractal analyses (divider, slit-island, variogram) are applied to surface distributions of asperity data (topography): (1) a granitic fracture from the Stripa mine in Sweden; (2) a faulted and geothermally altered fracture from Dixie Valley, Nevada, USA. The cutoff patterns (indicator maps) of the granitic fracture show a radial pattern, while those of the faulted fracture show a very anisotropic stretched pattern of shapes. Different cutoff patterns of the same surface generally yield the same fractal dimension with the slit-island technique. The slit-island technique assumes that the cut-off patterns are self-similar in the plane of the surface, with the perimeter versus area analyzed for the entire population of contours, regardless of aspect ratio. We measure the variance in the two coordinate directions as a function of perimeter/area ratio for the anisotropic fracture from Dixie Valley to determine a self-affine scaling ratio for the slit-island analysis. We compare this ratio with anisotropy ratios obtained from simulated flow models based on channeling of flow through the largest openings. The possible applications of fractal analyses to both the geometry and flow are evaluated. C1 [Cox, B. L.; Wang, J. S. Y.] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Cox, BL (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. FU Office of Civilian Radioactive Waste Management, Yucca Mountain Site Characterization, Office, Regulatory and Site Evaluation Division of the U.S. Department of Energy [DE-AC03-76SF0098] FX The authors with to thank Dr. Robert Zimmerman and Dr. Yvonne Tsang for reviewing this paper, and to Mr. Frank Hale for helping with the flow simulations. We also appreciate helpful discussion with Dr. Tamas Vicsek. Work is performed under the auspices of the Director, Office of Civilian Radioactive Waste Management, Yucca Mountain Site Characterization Project Office, Regulatory and Site Evaluation Division of the U.S. Department of Energy through Contract Number DE-AC03-76SF0098. NR 14 TC 7 Z9 7 U1 0 U2 3 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE SN 0218-348X J9 FRACTALS JI Fractals-Complex Geom. Patterns Scaling Nat. Soc. PD SEP PY 1993 VL 1 IS 3 BP 547 EP 559 DI 10.1142/S0218348X93000575 PG 13 WC Mathematics, Interdisciplinary Applications; Multidisciplinary Sciences SC Mathematics; Science & Technology - Other Topics GA V18WZ UT WOS:000208036200028 ER PT J AU THRING, RW CHORNET, E OVEREND, RP AF THRING, RW CHORNET, E OVEREND, RP TI THERMOGRAVIMETRIC ANALYSIS OF GLYCOL LIGNIN FRACTIONS OBTAINED BY SEQUENTIAL SOLVENT-EXTRACTION SO FUEL LA English DT Note DE GLYCOL LIGNIN; THERMOGRAVIMETRIC ANALYSIS; FRACTIONATION AB Data are presented on the thermal behaviour of a solvolytic lignin and its fractions during combustion and devolatilization in a thermal analyser. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO. UNIV SHERBROOKE,DEPT MECH ENGN,SHERBROOKE J1K 2R1,QUEBEC,CANADA. OI Overend, Ralph/0000-0002-5442-0890 NR 6 TC 5 Z9 5 U1 0 U2 5 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 SEP PY 1993 VL 72 IS 9 BP 1355 EP 1356 DI 10.1016/0016-2361(93)90138-R PG 2 WC Energy & Fuels; Engineering, Chemical SC Energy & Fuels; Engineering GA LT398 UT WOS:A1993LT39800014 ER PT J AU HARADA, H TAKAHASHI, H ARONSON, AL KASE, T KONASHI, K SASAO, N AF HARADA, H TAKAHASHI, H ARONSON, AL KASE, T KONASHI, K SASAO, N TI INCINERATION OF RADIOACTIVE FISSION-PRODUCTS AND TRANSURANICS BY MUON-CATALYZED FUSION SO FUSION TECHNOLOGY LA English DT Article DE INCINERATION; RADIOACTIVE WASTE; MUON-CATALYZED FUSION AB A system of nuclear transmutation is presented in which fission products and transuranics (TR U) are incinerated using 14-MeV neutrons produced by muon-catalyzed fusion (muCF) and a subcritical core composed of fission products and TRU. The 14-MeV neutrons produced by muCF are used to transmute Sr-90 (fission product) by the (n,2n) reaction. The outcoming neutrons from the Sr-90 cell transmute TR U through fission reactions and Tc-99 through (n,gamma) reactions. This fission energy is converted into electric energy to supply 4 Ge V-25 mA deuteron beam power, which is used to produce mu- mesons. We also evaluate the production of tritium that is consumed as a fuel for muCF The feasibility of the system was analyzed by the MCNP Monte Carlo neutron transport code. The results show that this system can be subcritical and can transmute fission products and TRU with an incineration half-life of approximately 1 yr and that the deuteron beam energy and tritium fuel required to operate the system can be supplied within the system cycle itself. C1 POWER REACTOR & NUCL FUEL DEV CORP,TOKAI,IBARAKI 31911,JAPAN. RP HARADA, H (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA. RI konashi, kenji/P-6215-2014 NR 16 TC 3 Z9 3 U1 0 U2 2 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 SEP PY 1993 VL 24 IS 2 BP 161 EP 167 PG 7 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LU792 UT WOS:A1993LU79200004 ER PT J AU ALVAREZ, L EVANS, JW WILKS, R LUCAS, JN BROWN, JM GIACCIA, AJ AF ALVAREZ, L EVANS, JW WILKS, R LUCAS, JN BROWN, JM GIACCIA, AJ TI CHROMOSOMAL RADIOSENSITIVITY AT INTRACHROMOSOMAL TELOMERIC SITES SO GENES CHROMOSOMES & CANCER LA English DT Article ID FUSION; (TTAGGG)N; SEQUENCE; ORIGIN AB Telomeric DNA is composed of highly conserved sequences which are present at the termini of chromosomes as well as at intrachromosomal locations. Here, we studied a Chinese hamster ovary (CHO) cell line, BL-10, with highly stable amplified telomeric DNA at the termini as well as at intrachromosomal locations. We show that intrachromosomal or interstitial telomeric sites in this cell line and in another CHO cell line, HA- 1, are radiosensitive in that they are more prone to breakage than would be expected based on the percentage of the genome composed of telomeric sequences. The frequency of breakage at interstitial telomeric sites is 4.3 to &3 times higher than that in the CHO genome overall. These conclusions are reached by both conventional cytogenetic analysis of two CHO cell lines which have the same survival rates after exposure to ionizing radiation, and by use of double fluorescence in situ hybridization (FISH) with a pan-telomere-specific probe and a CHO chromosome-specific library in the same metaphase cells after irradiation. (C) 1993 Wiley-Liss, Inc. C1 STANFORD UNIV,MED CTR,SCH MED,CANC BIOL RES LAB,CBRL GK115,STANFORD,CA 94305. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. FU NCI NIH HHS [CA 55801, CA 58838] NR 22 TC 80 Z9 82 U1 0 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 1045-2257 J9 GENE CHROMOSOME CANC JI Gene Chromosomes Cancer PD SEP PY 1993 VL 8 IS 1 BP 8 EP 14 DI 10.1002/gcc.2870080103 PG 7 WC Oncology; Genetics & Heredity SC Oncology; Genetics & Heredity GA LU380 UT WOS:A1993LU38000002 PM 7691162 ER PT J AU SANSON, M ZHANG, FR DEMCZUK, S DELATTRE, O DEJONG, P AURIAS, A THOMAS, G ROULEAU, GA AF SANSON, M ZHANG, FR DEMCZUK, S DELATTRE, O DEJONG, P AURIAS, A THOMAS, G ROULEAU, GA TI ISOLATION AND MAPPING OF 45 NOTI LINKING CLONES TO CHROMOSOME-22 SO GENOMICS LA English DT Note ID GENES; TRANSLOCATION; SEQUENCES; DNA C1 MONTREAL GEN HOSP,RES INST,MONTREAL H3G 1A4,QUEBEC,CANADA. MCGILL UNIV,CTR RES NEUROSCI,MONTREAL H3A 2T5,QUEBEC,CANADA. INST CURIE,BIOL SECT,CNRS,URA 620,F-75231 PARIS 05,FRANCE. LAWRENCE LIVERMORE NATL LAB,DIV BIOMED SCI L452,CTR HUMAN GENOME,LIVERMORE,CA 94550. NR 16 TC 5 Z9 5 U1 0 U2 3 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0888-7543 J9 GENOMICS JI Genomics PD SEP PY 1993 VL 17 IS 3 BP 776 EP 779 DI 10.1006/geno.1993.1407 PG 4 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA LX233 UT WOS:A1993LX23300040 PM 8244398 ER PT J AU GHISO, NS PAREKH, H LENNON, GG AF GHISO, NS PAREKH, H LENNON, GG TI A SUBSET OF 1200 HEXAMERS IS SUFFICIENT TO SEQUENCE OVER 95-PERCENT OF CDNAS BY HEXAMER STRING PRIMER WALKING SO GENOMICS LA English DT Note ID PROTEIN C1 LAWRENCE LIVERMORE NATL LAB, BIOL & BIOTECHNOL RES PROGRAM, CTR HUMAN GENOME, L-452, LIVERMORE, CA 94551 USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0888-7543 EI 1089-8646 J9 GENOMICS JI Genomics PD SEP PY 1993 VL 17 IS 3 BP 798 EP 799 DI 10.1006/geno.1993.1416 PG 2 WC Biotechnology & Applied Microbiology; Genetics & Heredity SC Biotechnology & Applied Microbiology; Genetics & Heredity GA LX233 UT WOS:A1993LX23300049 PM 8244407 ER PT J AU BROECKER, WS PENG, TH AF BROECKER, WS PENG, TH TI EVALUATION OF THE C-13 CONSTRAINT ON THE UPTAKE OF FOSSIL-FUEL CO2 BY THE OCEAN SO GLOBAL BIOGEOCHEMICAL CYCLES LA English DT Article ID GLOBAL CARBON-CYCLE; BUDGET AB The proposal by Quay et al. [1992] that the time histories of C-13 in atmospheric CO2 and oceanic SIGMACO2 provide a constraint on the magnitude of uptake of fossil fuel CO2 by the ocean is examined. Our analysis suggests that, while the potential is there, the data base is too inaccurate to permit a distinction to be made among the carbon budgets currently on the table. Examples are given to demonstrate that the twenty or so percent uncertainties in the size of the effective, exchange reservoir and-in the magnitudes of the temporal changes in the C-13/C-12 ratio in atmospheric CO2 and ocean SIGMACO2 are just too large to permit a reliable estimate of oceanic uptake of fossil fuel CO2. We conclude that tracer-verified ocean general circulation models offer much better estimates than that based on the C-13 budget. C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RP BROECKER, WS (reprint author), COLUMBIA UNIV,LAMONT DOHERTY GEOL OBSERV,PALISADES,NY 10964, USA. NR 16 TC 29 Z9 36 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0886-6236 J9 GLOBAL BIOGEOCHEM CY JI Glob. Biogeochem. Cycle PD SEP PY 1993 VL 7 IS 3 BP 619 EP 626 DI 10.1029/93GB01445 PG 8 WC Environmental Sciences; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Environmental Sciences & Ecology; Geology; Meteorology & Atmospheric Sciences GA LX222 UT WOS:A1993LX22200009 ER PT J AU KARP, KE AF KARP, KE TI A DIFFUSIVE SAMPLER FOR PASSIVE MONITORING OF VOLATILE ORGANIC-COMPOUNDS IN-GROUND WATER SO GROUND WATER LA English DT Article AB A diffusive sampler was developed to provide a passive in situ method for long-term monitoring of volatile organic compounds (VOCs) in the ground water at hazardous waste sites and waste disposal facilities. The sampler was constructed of a sorbent tube that fits inside a specially designed sampling chamber equipped with a diffusional membrane that is not permeable to water but has a high permeability rate for organic vapors. VOCs in the ground water, having relatively high Henry's Law constants, enter the chamber by molecular diffusion and are collected by the sorbent. After a predetermined exposure period, the sorbent is easily retrieved for laboratory analyses by gas chromatography/mass spectrometry (GC/MS), or qualitative concentrations can be determined in the field directly using specific-indicator detectors in place of the sorbent. The measurement approach was evaluated in the laboratory by exposing the device to a solution of 22.5 mug/l o-xylene before testing at a field site where the ground water was contaminated by trichlorethylene (TCE). Results of the laboratory and field studies indicate the sampling approach is viable for monitoring relatively low concentrations of VOCs over a one-day sampling period, as well as providing longer monitoring periods up to 51 days. RP KARP, KE (reprint author), US DOE,GRAND JUNCT PROJECTS OFF,RUST GEOTECH INC,POB 14000,GRAND JCT,CO 81502, USA. NR 3 TC 14 Z9 14 U1 1 U2 1 PU GROUND WATER PUBLISHING CO PI WESTERVILLE PA 601 DEMPSEY RD, WESTERVILLE, OH 43081 SN 0017-467X J9 GROUND WATER JI Ground Water PD SEP-OCT PY 1993 VL 31 IS 5 BP 735 EP 739 DI 10.1111/j.1745-6584.1993.tb00844.x PG 5 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA LW315 UT WOS:A1993LW31500005 ER PT J AU SPANE, FA WURSTNER, SK AF SPANE, FA WURSTNER, SK TI DERIV - A COMPUTER-PROGRAM FOR CALCULATING PRESSURE DERIVATIVES FOR USE IN HYDRAULIC TEST ANALYSIS SO GROUND WATER LA English DT Note ID AQUIFER AB Hydrologic test analysis based on the derivative of pressure (i.e., rate of pressure change) with respect to the natural logarithm of time has been shown to significantly improve the diagnostic and quantitative analysis of slug and constant-rate pumping tests. The improvement in test analysis is attributed to the sensitivity of the derivative to small variations in the pressure change that occurs during testing, which would otherwise be less obvious with standard pressure change versus time analysis. The sensitivity of the pressure derivative to pressure change facilitates its use in identifying the effects of wellbore storage, boundaries, and establishment of radial flow conditions on the test. DERIV is a program for converting slug and pumping test data and associated type curves to derivative format. The program has features that permit the smoothing of noisy test data, accounts for pressure derivative end-effects, and can be used to convert slug test data to equivalent pumping test responses. Test examples that demonstrate the use of pressure derivatives also are provided. RP SPANE, FA (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA. NR 29 TC 25 Z9 27 U1 0 U2 1 PU GROUND WATER PUBLISHING CO PI WESTERVILLE PA 601 DEMPSEY RD, WESTERVILLE, OH 43081 SN 0017-467X J9 GROUND WATER JI Ground Water PD SEP-OCT PY 1993 VL 31 IS 5 BP 814 EP 822 DI 10.1111/j.1745-6584.1993.tb00855.x PG 9 WC Geosciences, Multidisciplinary; Water Resources SC Geology; Water Resources GA LW315 UT WOS:A1993LW31500016 ER PT J AU STEVENSON, KA HARDY, EP AF STEVENSON, KA HARDY, EP TI ESTIMATE OF EXCESS URANIUM IN SURFACE SOIL SURROUNDING THE FEED MATERIALS PRODUCTION CENTER USING A REQUALIFIED DATA-BASE SO HEALTH PHYSICS LA English DT Article DE URANIUM; SOIL; RADIATION, BACKGROUND; CONTAMINATION, ENVIRONMENTAL AB A conservative estimate of the excess total uranium in the top 5 cm of soil surrounding the former Feed Materials Production Center was made using a data base compiled by the International Technology Corporation in 1986, and the requalification of that data base was completed in 1988. The results indicate that within an area of 8 km2, extending 2 km both northeast and southwest of the Feed Materials Production Center, the uranium concentration is between 2 and 5 times greater than average natural background radiation levels. More than 85% of this excess uranium is deposited within 1 km of the site boundary. The presence of any excess uranium outside of this area is indistinguishable from the natural background contribution. RP STEVENSON, KA (reprint author), US DOE, ENVIRONM MEASUREMENTS LAB, 376 HUDSON ST, NEW YORK, NY 10014 USA. NR 4 TC 8 Z9 8 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 SEP PY 1993 VL 65 IS 3 BP 283 EP 287 DI 10.1097/00004032-199309000-00005 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 LV371 UT WOS:A1993LV37100006 PM 8244697 ER PT J AU XIE, YG HAN, FY PEYRARD, M RUTTLEDGE, MH FRANSSON, I DEJONG, P COLLINS, J DUNHAM, I NORDENSKJOLD, M DUMANSKI, JP AF XIE, YG HAN, FY PEYRARD, M RUTTLEDGE, MH FRANSSON, I DEJONG, P COLLINS, J DUNHAM, I NORDENSKJOLD, M DUMANSKI, JP TI CLONING OF A NOVEL, ANONYMOUS GENE FROM A MEGABASE-RANGE YAC AND COSMID CONTIG IN THE NEUROFIBROMATOSIS TYPE-2 MENINGIOMA REGION ON HUMAN CHROMOSOME-22Q12 SO HUMAN MOLECULAR GENETICS LA English DT Article ID SUBUNIT NF-H; BILATERAL ACOUSTIC NEUROFIBROMATOSIS; YEAST ARTIFICIAL CHROMOSOMES; UNITED-KINGDOM; DNA FRAGMENTS; HUMAN GENOME; LIBRARIES; SEQUENCES; TUMORS; HETEROZYGOSITY AB In order to permit detailed characterization of meningioma cases showing deletions within chromosomal band 22q12 and further systematically clone genes located within this region, we established a genomic YAC and cosmid contig which encompasses a region in excess of 1000 kb of 22q12. The YAC contig consists of 6 YAC clones arranged into 5 overlapping steps covering more than 1100 kb. Two corresponding cosmid contigs consisting of 40 steps of overlapping groups of cosmids encompasses 900 - 1000 kb. This set of genomic clones provides a detailed physical map of this part of chromosome 22 and constitutes a basis for the isolation and characterization of genes that may be located within this chromosomal region. Employing the exon-amplification method on two cosmids from the contig, we cloned a novel, anonymous gene, pK1.3, which potentially encodes a protein of 683 amino acids with a predicted molecular weight of of 78.5 kD. Its 2.7 kb mRNA is expressed ubiquitously. We estimated the genomic size of this gene to 100 - 150 kb, and it is located in the immediate centromeric vicinity of the neurofibromatosis 2 (NF2) tumor suppressor gene. C1 KAROLINSKA HOSP,DEPT CLIN GENET,S-10401 STOCKHOLM 60,SWEDEN. KAROLINSKA HOSP,LUDWIG INST CANC RES,STOCKHOLM BRANCH,CLIN GRP,S-10401 STOCKHOLM 60,SWEDEN. GUYS HOSP,PAEDIAT RES UNIT,LONDON SE1 9RT,ENGLAND. LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME L452,LIVERMORE,CA 94550. NR 55 TC 29 Z9 30 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0964-6906 J9 HUM MOL GENET JI Hum. Mol. Genet. PD SEP PY 1993 VL 2 IS 9 BP 1361 EP 1368 PG 8 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA LX497 UT WOS:A1993LX49700003 PM 8242058 ER PT J AU PRESTRIDGE, DS BURKS, C AF PRESTRIDGE, DS BURKS, C TI THE DENSITY OF TRANSCRIPTIONAL ELEMENTS IN PROMOTER AND NON-PROMOTER SEQUENCES SO HUMAN MOLECULAR GENETICS LA English DT Article ID HUMAN GENOME PROJECT; DNA-BINDING PROTEINS; DATABASE; REGIONS; GENES AB Using data currently available from transcriptional element (TE) databases, we have analyzed the density of these elements in both promoter and non-promoter sequences obtained from the GenBank sequence database. The density of putative TEs in non-promoter sequences was about 16% higher than that seen in pseudo-random DNA sequences. Promoter TE density from the transcription startsite to 100 basepairs upstream was found to be about 42% higher than in non-promoter sequences. However, the extensive overlap of putative TE densities between promoters and non-promoters confounds an attempt to use TE density as a simple discriminator. C1 LOS ALAMOS NATL LAB,THEORET BIOL & BIOPHYS GRP,LOS ALAMOS,NM 87545. UNIV COLORADO,DEPT MOLEC CELLULAR & DEV BIOL,BOULDER,CO 80309. FU NHGRI NIH HHS [HG-00249]; NIGMS NIH HHS [GM-37812] NR 29 TC 27 Z9 28 U1 1 U2 1 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0964-6906 J9 HUM MOL GENET JI Hum. Mol. Genet. PD SEP PY 1993 VL 2 IS 9 BP 1449 EP 1453 DI 10.1093/hmg/2.9.1449 PG 5 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA LX497 UT WOS:A1993LX49700017 PM 8242068 ER PT J AU SHEN, Y HOLMAN, K DOGGETT, NA CALLEN, DF SUTHERLAND, GR RICHARDS, RI AF SHEN, Y HOLMAN, K DOGGETT, NA CALLEN, DF SUTHERLAND, GR RICHARDS, RI TI 5 DINUCLEOTIDE REPEAT POLYMORPHISMS ON HUMAN CHROMOSOME-16Q24.2-Q24.3 SO HUMAN MOLECULAR GENETICS LA English DT Note C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP SHEN, Y (reprint author), ADELAIDE CHILDRENS HOSP INC,DEPT CYTOGENET & MOLEC GENET,ADELAIDE,SA 5006,AUSTRALIA. RI Sutherland, Grant/D-2606-2012; Callen, David/G-1975-2012 NR 2 TC 3 Z9 3 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0964-6906 J9 HUM MOL GENET JI Hum. Mol. Genet. PD SEP PY 1993 VL 2 IS 9 BP 1504 EP 1504 DI 10.1093/hmg/2.9.1504 PG 1 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA LX497 UT WOS:A1993LX49700036 PM 8242083 ER PT J AU SHEN, Y HOLMAN, K DOGGETT, NA CALLEN, DF SUTHERLAND, GR RICHARDS, RI AF SHEN, Y HOLMAN, K DOGGETT, NA CALLEN, DF SUTHERLAND, GR RICHARDS, RI TI 6 DINUCLEOTIDE REPEAT POLYMORPHISMS ON HUMAN CHROMOSOME-16Q12.1-Q24.1 SO HUMAN MOLECULAR GENETICS LA English DT Note C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP SHEN, Y (reprint author), ADELAIDE CHILDRENS HOSP INC,DEPT CYTOGENET & MOLEC GENET,ADELAIDE,SA 5006,AUSTRALIA. RI Sutherland, Grant/D-2606-2012; Callen, David/G-1975-2012 NR 2 TC 3 Z9 3 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0964-6906 J9 HUM MOL GENET JI Hum. Mol. Genet. PD SEP PY 1993 VL 2 IS 9 BP 1505 EP 1505 DI 10.1093/hmg/2.9.1505 PG 1 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA LX497 UT WOS:A1993LX49700037 PM 8242084 ER PT J AU SHEN, Y HOLMAN, K DOGGETT, NA CALLEN, DF SUTHERLAND, GR RICHARDS, RI AF SHEN, Y HOLMAN, K DOGGETT, NA CALLEN, DF SUTHERLAND, GR RICHARDS, RI TI 3 DINUCLEOTIDE REPEAT POLYMORPHISMS ON HUMAN CHROMOSOME-16P13.11-P13.3 SO HUMAN MOLECULAR GENETICS LA English DT Note C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP SHEN, Y (reprint author), ADELAIDE CHILDRENS HOSP INC,DEPT CYTOGENET & MOLEC GENET,ADELAIDE,SA 5006,AUSTRALIA. RI Sutherland, Grant/D-2606-2012; Callen, David/G-1975-2012 NR 2 TC 3 Z9 3 U1 0 U2 0 PU OXFORD UNIV PRESS UNITED KINGDOM PI OXFORD PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP SN 0964-6906 J9 HUM MOL GENET JI Hum. Mol. Genet. PD SEP PY 1993 VL 2 IS 9 BP 1506 EP 1506 DI 10.1093/hmg/2.9.1506 PG 1 WC Biochemistry & Molecular Biology; Genetics & Heredity SC Biochemistry & Molecular Biology; Genetics & Heredity GA LX497 UT WOS:A1993LX49700038 PM 8242085 ER PT J AU LEAR, KL CHALMERS, SA AF LEAR, KL CHALMERS, SA TI HIGH SINGLE-MODE POWER CONVERSION EFFICIENCY VERTICAL-CAVITY TOP-SURFACE-EMITTING LASERS SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article AB We report advances in the power conversion (wall-plug) efficiency of vertical-cavity top-surface-emitting lasers. The devices were fabricated from molecular beam epitaxial layers using deep proton implants to define gain-guided lasers. The epitaxial structure included low resistance, piecewise linearly graded n-type and p-type mirrors, a triple In0.2Ga0.8As quantum-well active region, and a delta-doped contact layer. Power conversion efficiencies as high as 12.7% for continuous-wave single-mode operation were measured after several hours of device operation. RP LEAR, KL (reprint author), SANDIA NATL LABS,PHOTON RES DEPT,ALBUQUERQUE,NM 87185, USA. NR 13 TC 16 Z9 16 U1 1 U2 3 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD SEP PY 1993 VL 5 IS 9 BP 972 EP 975 DI 10.1109/68.257162 PG 4 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA MH165 UT WOS:A1993MH16500005 ER PT J AU ZHOU, P CHENG, J ZOLPER, JC LEAR, KL CHALMERS, SA VAWTER, GA LEIBENGUTH, RE ADAMS, AC AF ZHOU, P CHENG, J ZOLPER, JC LEAR, KL CHALMERS, SA VAWTER, GA LEIBENGUTH, RE ADAMS, AC TI MONOLITHIC OPTOELECTRONIC SWITCH BASED ON THE INTEGRATION OF A GAAS/ALGAAS HETEROJUNCTION BIPOLAR-TRANSISTOR AND A GAAS VERTICAL-CAVITY SURFACE-EMITTING LASER SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article AB We describe the design and the first experimental demonstration of a monolithic integrated optoelectronic switch combining a GaAs/AlGaAs heterojunction bipolar transistor (HBT) with a vertical-cavity surface-emitting laser (VCSEL). The switch has high current gain (500-700), low power dissipation (27 and 55 mW dc at optical output levels of 0.4 and 1.2 mW, respectively), and a high optical-to-electrical conversion efficiency (150 W/A) under dc bias conditions, thus providing a high-performance electrical-to-optical interface for high-speed optical interconnections. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. AT&T BELL LABS,MURRAY HILL,NJ 07974. RP ZHOU, P (reprint author), UNIV NEW MEXICO,CTR HIGH TECHNOL MAT,ALBUQUERQUE,NM 87131, USA. NR 8 TC 10 Z9 10 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD SEP PY 1993 VL 5 IS 9 BP 1035 EP 1038 DI 10.1109/68.257183 PG 4 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA MH165 UT WOS:A1993MH16500026 ER PT J AU HADLEY, GR AF HADLEY, GR TI DESIGN OF TAPERED WAVE-GUIDES FOR IMPROVED OUTPUT COUPLING SO IEEE PHOTONICS TECHNOLOGY LETTERS LA English DT Article ID HIGH-POWER; LASERS AB Waveguides whose width increases linearly with distance are shown to be an excellent means for decreasing the beam divergence of the guided mode and thus improving output coupling, provided the taper angle is carefully chosen. Such tapered waveguides can provide nearly diffraction-limited output while incurring virtually no energy penalty. Beam propagation calculations together with a dimensional analysis allow the first quantitative prediction of output beam divergence for a wide range of input parameters. Performance is shown to be optimal for taper angles of about 0.4 times the input beam's full width at half maximum (FWHM) divergence angle, subsequently reducing the latter by a factor of five. RP HADLEY, GR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 10 TC 7 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 1041-1135 J9 IEEE PHOTONIC TECH L JI IEEE Photonics Technol. Lett. PD SEP PY 1993 VL 5 IS 9 BP 1068 EP 1070 DI 10.1109/68.257194 PG 3 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA MH165 UT WOS:A1993MH16500037 ER PT J AU HELMAN, P LIEPINS, G AF HELMAN, P LIEPINS, G TI STATISTICAL FOUNDATIONS OF AUDIT TRAIL ANALYSIS FOR THE DETECTION OF COMPUTER MISUSE SO IEEE TRANSACTIONS ON SOFTWARE ENGINEERING LA English DT Article DE ANOMALY DETECTION; AUDIT TRAIL ANALYSIS; COMPUTER SECURITY; INTRUSION DETECTION; PROBABILITY THEORY AB We model computer transactions as generated by two stationary stochastic processes, the legitimate (normal) process N and the misuse process M. We define misuse (anomaly) detection to be the identification of transactions most likely to have been generated by M. We formally demonstrate that the accuracy of misuse detectors is bounded by a function of the difference of the densities of the processes N and M over the space of transactions. In practice, detection accuracy can be far below this bound, and generally improves with increasing sample size of historical (training) data. Careful selection of transaction attributes also can improve detection accuracy; we suggest several criteria for attribute selection, including adequate sampling rate and separation between models. We demonstrate that exactly optimizing even the simplest of these criteria is NP-hard, thus motivating a heuristic approach. We further differentiate between modeling (density estimation) and nonmodeling approaches. We introduce a frequentist method as a special case of the former, and Wisdom and Sense, developed at Los Alamos National Laboratory, as a special case of the latter. For nonmodeling approaches such as Wisdom and Sense that generate statistical rules, we show that the rules must be maximally specific to ensure consistency with Bayesian analysis. Finally, we provide suggestions for testing detection systems and present limited test results using Wisdom and Sense and the frequentist approach. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT COMP SCI,KNOXVILLE,TN 37996. RP HELMAN, P (reprint author), UNIV NEW MEXICO,DEPT COMP SCI,ALBUQUERQUE,NM 87131, USA. NR 23 TC 54 Z9 58 U1 1 U2 6 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 SN 0098-5589 J9 IEEE T SOFTWARE ENG JI IEEE Trans. Softw. Eng. PD SEP PY 1993 VL 19 IS 9 BP 886 EP 901 DI 10.1109/32.241771 PG 16 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA MH080 UT WOS:A1993MH08000004 ER PT J AU VIANCO, PT AF VIANCO, PT TI ROBUST SOLDER JOINT ATTACHMENT OF COAXIAL-CABLE LEADS TO PIEZOELECTRIC CERAMIC ELECTRODES SO IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL LA English DT Article AB A technique was developed for the solder attachment of coaxial cable leads to the silver bearing thick film electrodes on piezoelectric ceramics. Soldering the cable leads directly to the thick film caused bonds with low mechanical strength due to poor solder joint geometry. A barrier coating of 1.5 mum Cu/1.5 mum Ni/1.0 mum Sn deposited on the thick film layer improved the strength of the solder joints by eliminating the adsorption of Ag from the thick film which was responsible for the improper solder joint geometry. The procedure does not require special preparation of the electrode surface and is cost effective due to the use of nonprecious metal films and the batch processing capabilities of the electron beam deposition technique. RP VIANCO, PT (reprint author), SANDIA NATL LABS,DEPT PHYS & JOINING MET,ALBUQUERQUE,NM 87185, USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2394 SN 0885-3010 J9 IEEE T ULTRASON FERR JI IEEE Trans. Ultrason. Ferroelectr. Freq. Control PD SEP PY 1993 VL 40 IS 5 BP 544 EP 550 DI 10.1109/58.238108 PG 7 WC Acoustics; Engineering, Electrical & Electronic SC Acoustics; Engineering GA MA444 UT WOS:A1993MA44400016 PM 18263219 ER PT J AU MANLEY, O MARION, M TEMAM, R AF MANLEY, O MARION, M TEMAM, R TI EQUATIONS OF COMBUSTION IN THE PRESENCE OF COMPLEX CHEMISTRY SO INDIANA UNIVERSITY MATHEMATICS JOURNAL LA English DT Article AB Our aim in this article is to study the equations of combustion in the presence of complex chemistry. A model of laminar premixed flame is considered. Two types of theoretical results are derived. First we study existence and uniqueness of solutions and verify maximum principle properties. In particular we show that the temperature remains bounded, a. property which has been conjectured for some time but not yet proved [1]. Secondly we consider the associated attractor and estimate its dimension. The analysis is carried out for an arbitrary Lewis number and general, physically realistic chemical kinetics. The convective motion induced by the combustion is treated in the Overbeck-Boussinescq approximation. The characteristic lengths determining the attractor dimension are identified. C1 ECOLE CENT LYON,F-69131 ECULLY,FRANCE. UNIV PARIS 11,ANAL NUMER LAB,F-91405 ORSAY,FRANCE. INDIANA UNIV,INST SCI COMP & APPL MATH,BLOOMINGTON,IN 47405. RP MANLEY, O (reprint author), US DOE,WASHINGTON,DC 20585, USA. NR 14 TC 15 Z9 15 U1 0 U2 0 PU INDIANA UNIV MATH JOURNAL PI BLOOMINGTON PA SWAIN HALL EAST 222, BLOOMINGTON, IN 47405 SN 0022-2518 J9 INDIANA U MATH J JI Indiana Univ. Math. J. PD FAL PY 1993 VL 42 IS 3 BP 941 EP 967 DI 10.1512/iumj.1993.42.42044 PG 27 WC Mathematics SC Mathematics GA MU694 UT WOS:A1993MU69400015 ER PT J AU SHAMSI, A AF SHAMSI, A TI PARTIAL OXIDATION OF ETHANE AND ETHYLENE IN THE PRESENCE AND ABSENCE OF C-13-LABELED METHANE ON REDUCIBLE AND NONREDUCIBLE OXIDE CATALYSTS SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH LA English DT Article ID PEROVSKITE-TYPE OXIDES; GAS-PHASE; SELECTIVITY; OXYGEN AB Ethane and ethylene were partially oxidized in the presence and absence of C-13-labeled methane and catalyst to determine the relative reactivity of ethane and ethylene compared to methane. The relative reactivities are in the order of ethylene > ethane >> methane for reactions in the gas phase (empty reactor) and on catalysts containing reducible oxides of transition metals such as Ca/Ni/K. However, this order changed to ethane > ethylene >> methane for a nonreducible catalyst, such as sodium-promoted Sm2O3. The results also showed that in the presence of methane and catalysts ethane and ethylene, depending on their partial pressures, compete for active species in the gas phase and active centers on the catalyst. The effects of pressure, temperature, and contact time on partial oxidation of ethane and ethylene were investigated in an empty alumina reactor. It was found that the temperatures at which 50% of oxygen converted (at steady state) during partial oxidation of ethane and ethylene were significantly less than the temperature at which 50% oxygen converted during partial oxidation of methane. The higher reactivity of products compared to the reactant appeared to be a major factor preventing achievement of the yield required for an economical process to convert natural gas to liquid fuels. RP SHAMSI, A (reprint author), US DOE,MORGANTOWN ENERGY TECHNOL CTR,POB 880,MORGANTOWN,WV 26507, USA. NR 16 TC 5 Z9 5 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 SEP PY 1993 VL 32 IS 9 BP 1877 EP 1881 DI 10.1021/ie00021a010 PG 5 WC Engineering, Chemical SC Engineering GA LW542 UT WOS:A1993LW54200010 ER PT J AU SALAYMEH, F BERHANE, S YUSOF, R DELAROSA, R FUNG, EY MATAMOROS, R LAU, KW ZHENG, Q KOBER, EM CURTIS, JC AF SALAYMEH, F BERHANE, S YUSOF, R DELAROSA, R FUNG, EY MATAMOROS, R LAU, KW ZHENG, Q KOBER, EM CURTIS, JC TI ELECTRONIC COUPLING IN MIXED-VALENCE BINUCLEAR RUTHENIUM AMMINE COMPLEXES AS PROBED BY AN ELECTROCHEMICAL METHOD AND AN EXTENSION OF MULLIKEN THEORY OF DONOR-ACCEPTOR INTERACTIONS SO INORGANIC CHEMISTRY LA English DT Article ID CREUTZ-TAUBE ION; ALPHA,OMEGA-DIPYRIDYL TRANS-POLYENES; METAL BIMETALLIC COMPLEXES; CHARGE-TRANSFER COMPLEXES; INTERVALENCE-TRANSFER; ENERGY-TRANSFER; BRIDGED SYSTEMS; BIS(PENTAAMMINERUTHENIUM) COMPLEXES; COMPROPORTIONATION CONSTANT; LINE-SHAPES AB An electrochemical approach to assessing the degree of electronic coupling in mixed-valence binuclear complexes is outlined, The method relies on the comparison of electrochemical potential shifts induced at both the directly and indirectly perturbed metal sites when a ligand substitution process is carried out at one site, e.g., [symmetric] (NH3)5Ru-L(br)-Ru(NH3)5(4+/5+/6+) --> [asymmetric]L(NH3)5Ru-L(br)-Ru(NH3)5(4+/5+/6+), where the bridging ligand L(br) is either pyrazine or 4-cyanopyridine and the perturbing ligand 1- is a substituted pyridine. It is found that the degree of electronic coupling in these systems is at least three times that which would be predicted based solely on spectroscopic measurements. The stabilization energy due to electron delocalization in these complexes can be accounted for with near-quantitative accuracy. It is also shown how the Mulliken analysis of the data allows for an estimation of the Wolfsberg-Helmholz constant K, which can be used in the calculation of off-diagonal matrix elements for molecular donor-acceptor interactions. C1 UNIV CALIF SAN FRANCISCO, DEPT CHEM, 2130 FULTON ST, SAN FRANCISCO, CA 94117 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. NR 86 TC 75 Z9 75 U1 2 U2 6 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0020-1669 EI 1520-510X J9 INORG CHEM JI Inorg. Chem. PD SEP 1 PY 1993 VL 32 IS 18 BP 3895 EP 3908 DI 10.1021/ic00070a021 PG 14 WC Chemistry, Inorganic & Nuclear SC Chemistry GA LV766 UT WOS:A1993LV76600021 ER PT J AU BILLO, RE DEARBORN, F HOSTICK, CJ SPANNER, GE STAHLMAN, EJ AURAND, SS AF BILLO, RE DEARBORN, F HOSTICK, CJ SPANNER, GE STAHLMAN, EJ AURAND, SS TI A GROUP TECHNOLOGY MODEL TO ASSESS CONSOLIDATION AND RECONFIGURATION OF MULTIPLE INDUSTRIAL-OPERATIONS - A SHARED MANUFACTURING SOLUTION SO INTERNATIONAL JOURNAL OF COMPUTER INTEGRATED MANUFACTURING LA English DT Article ID COMPONENT AB A model for aiding a large enterprise in decisions regarding consolidation and reconfiguration of its facilities to shared manufacturing facilities is described. Shared manufacturing is the sharing of modern manufacturing technologies and management systems by different manufacturers with similar needs. The concept of shared manufacturing is extended to assess its usefulness to a large enterprise separated by wide geographic distances and focusing on re-manufacturing of products rather than original manufacturing. Production flow analysis was used to assess the technical feasibility of shared manufacturing by measuring the degree of similarity in processing of equivalent items at multiple facilities. Economic feasibility was assessed through development of a cost model that would directly compare savings incurred among factories. Practical feasibility was assessed through resolution of a variety of qualitative factors including the impact of capacity, quality, evolving technology, jigs and fixtures, changing workloads, and out-of-station costs. The model was applied to a case study for the analysis of engines with respect to a decision to consolidate engine workload to a shared manufacturing facility. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. ARIZONA STATE UNIV, CIM SYST RES CTR, TEMPE, AZ 85287 USA. RP BILLO, RE (reprint author), UNIV PITTSBURGH, PITTSBURGH, PA 15260 USA. NR 7 TC 2 Z9 2 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI LONDON PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE SN 0951-192X J9 INT J COMP INTEG M JI Int. J. Comput. Integr. Manuf. PD SEP-OCT PY 1993 VL 6 IS 5 BP 311 EP 322 DI 10.1080/09511929308944583 PG 12 WC Computer Science, Interdisciplinary Applications; Engineering, Manufacturing; Operations Research & Management Science SC Computer Science; Engineering; Operations Research & Management Science GA LR936 UT WOS:A1993LR93600004 ER PT J AU SHA, WT SOO, SL AF SHA, WT SOO, SL TI DEVELOPMENT OF STEADY FLOW OF LIQUID-FILM OVER A DOMED CYLINDER SO INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW LA English DT Article DE LIQUID FILM FLOW; THIN FILM FLOW; DEVELOPMENT OF THIN FILM FLOW ID HEAT-TRANSFER AB Development of steady flow of a uniform liquid film over a domed cylinder in both laminar and turbulent regimes was formulated and solved. Depending on the inlet condition, the flow may start with the accelerating or decelerating mode and arrive at the terminal velocity asymptotically. C1 UNIV ILLINOIS,1206 W GREEN ST,URBANA,IL 61801. ARGONNE NATL LAB,ARGONNE,IL 60439. NR 8 TC 1 Z9 1 U1 1 U2 1 PU BUTTERWORTH-HEINEMANN PI WOBURN PA 225 WILDWOOD AVE #UNITB PO BOX 4500, WOBURN, MA 01801-2084 SN 0142-727X J9 INT J HEAT FLUID FL JI Int. J. Heat Fluid Flow PD SEP PY 1993 VL 14 IS 3 BP 254 EP 259 DI 10.1016/0142-727X(93)90056-S PG 6 WC Thermodynamics; Engineering, Mechanical; Mechanics SC Thermodynamics; Engineering; Mechanics GA LW434 UT WOS:A1993LW43400007 ER PT J AU MANESCHY, CE MASSOUDI, M VELLOSO, VR AF MANESCHY, CE MASSOUDI, M VELLOSO, VR TI DYNAMIC ELASTIC SOLUTIONS IN NEO-HOOKEAN AND MOONEY RIVLIN MATERIALS SO INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS LA English DT Article AB Inhomogeneous motions are discussed within the context of non-linear constitutive theories. Deformations set up by time-dependent applied forces or displacements are analyzed for an infinite slab of neo-Hookean material and a circular cylinder of a Mooney-Rivlin type. The problems reduce to obtaining the solutions for simple linear differential equations. C1 PITTSBURGH ENERGY TECHNOL CTR,DEPT ENERGY,PITTSBURGH,PA 15236. FUNREI,DEPT MECH ENGN,SAO JOAO REI,MG,BRAZIL. PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT MECH ENGN,BR-20000 RIO JANEIRO,BRAZIL. RP MANESCHY, CE (reprint author), UNIV PITTSBURGH,DEPT MECH ENGN,PITTSBURGH,PA 15261, USA. NR 8 TC 4 Z9 5 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0020-7462 J9 INT J NONLINEAR MECH JI Int. J. Non-Linear Mech. PD SEP PY 1993 VL 28 IS 5 BP 531 EP 534 DI 10.1016/0020-7462(93)90045-M PG 4 WC Mechanics SC Mechanics GA MD167 UT WOS:A1993MD16700004 ER PT J AU SCHOENTHALER, R CASTRO, JR HALBERG, FE PHILLIPS, TL AF SCHOENTHALER, R CASTRO, JR HALBERG, FE PHILLIPS, TL TI DEFINITIVE POSTOPERATIVE IRRADIATION OF BILE-DUCT CARCINOMA WITH CHARGED-PARTICLES AND OR PHOTONS SO INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS LA English DT Article DE BILE DUCT; BILIARY; CANCER; NEOPLASM; ADENOCARCINOMA; CHARGED PARTICLES; HELIUM; NEON; BRACHYTHERAPY; RADIOTHERAPY; 2ND MALIGNANCIES; CHOLANGIOCARCINOMAS ID BILIARY-TRACT; PROXIMAL CHOLANGIOCARCINOMAS; HILAR CHOLANGIOCARCINOMA; PROGNOSTIC FACTORS; RADIOTHERAPY; GALLBLADDER; TRANSPLANTATION; RESECTION; SURVIVAL; FAILURE AB Purpose: To determine the rates of survival and local control in patients with bile duct adenocarcinomas treated with post-operative photons and/or charged particles. Methods and Materials: A retrospective study was performed analyzing all patients with bile duct adenocarcinomas who received radiotherapy through the University of California San Francisco and at Lawrence Berkeley Laboratory between 1977 and 1987, a total of 62 patients. University of California San Francisco patients received photon therapy (median dose 5400 cGy), and Lawrence Berkeley Laboratory patients were treated with the charged particles helium and/or neon (median dose 6000 cGyE). Forty-eight patients were treated post-operatively with curative intent, 30 with photons and 18 with particles. Thirty-six patients in the study had gross residual disease; none had microscopically negative margins. Results: The overall two-year actuarial survival was 28%: 44% for particle-treated patients and 18% for patients treated with photons (p = .048). Median actuarial survival was 23 months in particle patients and 12 months in photon patients. Local control was also improved, though less significantly, in patients treated with particles (median disease-free survival 20 months vs. 4.5 months, p = .054). A univariate and multivariate analysis was performed and revealed that only extent of residual disease predicted local failure and overall survival; no other prognostic factors were identified. Conclusion: Compared to conventional photon radiotherapy, treatment with post-operative charged particle irradiation at Lawrence Berkeley Laboratory appeared to offer a survival advantage in this non-randomized series. Additional investigation into protection of surrounding normal tissue with better dose localization through the use of charged particles is planned. C1 UNIV CALIF SAN FRANCISCO,DEPT RADIAT ONCOL,SAN FRANCISCO,CA 94143. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. FU NCI NIH HHS [NCI CA 19138] NR 35 TC 19 Z9 19 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 SEP 1 PY 1993 VL 27 IS 1 BP 75 EP 82 PG 8 WC Oncology; Radiology, Nuclear Medicine & Medical Imaging SC Oncology; Radiology, Nuclear Medicine & Medical Imaging GA LX662 UT WOS:A1993LX66200010 PM 8365945 ER PT J AU HAVSTAD, MA SELF, SA AF HAVSTAD, MA SELF, SA TI SENSITIVITIES OF MEASUREMENT METHODS FOR THE THERMAL RADIATIVE PROPERTIES AND OPTICAL-CONSTANTS OF METALS IN THE SPECTRAL RANGE 0.4 TO 10 MU-M SO INTERNATIONAL JOURNAL OF THERMOPHYSICS LA English DT Article DE ELLIPSOMETRY; EXTINCTION COEFFICIENT; INDEX OF REFRACTION; OPTICAL PROPERTIES; THERMAL RADIATIVE PROPERTIES ID LIQUID-METALS; ELLIPSOMETRY AB The sensitivities to measurement errors and potential effectiveness of six methods (involving reflection, emission, and ellipsometry) for determining the optical constants (index of refraction n and extinction coefficient k) of isotropic conductors are compared. The methods treated are generally regarded as most promising for use with high-temperature solid and liquid metals with smooth surfaces of high purity. For each method, contours of constant measured variable are plotted vs n and k. By analysis of the spacing and angle of intersection of these contours, we show that only methods based on measuring both amplitude attenuation and phase shift on reflection can yield n and k, and thus the spectral and directional emissivity, reflectivity, and absorptivity, with reasonable precision over the spectral range 0.4 to 10 mum. Methods based only on amplitude attenuation on reflection, or on the angular dependence of emission, are poorly suited to ranges of n and k that are typical of the infrared. The method of Beattie and Conn retains the ability to determine both optical constants to 10 mum. C1 STANFORD UNIV,DEPT MECH ENGN,PALO ALTO,CA 94304. RP HAVSTAD, MA (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 33 TC 3 Z9 3 U1 2 U2 7 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0195-928X J9 INT J THERMOPHYS JI Int. J. Thermophys. PD SEP PY 1993 VL 14 IS 5 BP 1077 EP 1099 DI 10.1007/BF00505677 PG 23 WC Thermodynamics; Chemistry, Physical; Mechanics; Physics, Applied SC Thermodynamics; Chemistry; Mechanics; Physics GA LZ416 UT WOS:A1993LZ41600007 ER PT J AU PYROGOV, SM KORNEJEV, AA HANSEN, ADA AF PYROGOV, SM KORNEJEV, AA HANSEN, ADA TI ABSORBING AEROSOL OF PACIFIC EQUATORIAL ZONE MEASURED IN SAGA-3 EXPERIMENT SO IZVESTIYA AKADEMII NAUK FIZIKA ATMOSFERY I OKEANA LA Russian DT Article ID LIGHT-ABSORPTION; SOOT AB The article describes results of soot aerosol concentration (BC) measurements obtained during the Soviet-American experiment SAGA-3. Non-zero values were observed for the gradient of concentration in the direction from north to south hemisphere. Significant variations of concentration for both hemispheres were registered. The results can be considered as proving the existence of spatio-temporal variability of soot aerosol over the ocean. Additional studies are required to clarify the nature of this variability and to determine its scale. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP PYROGOV, SM (reprint author), RUSSIAN ACAD SCI,INST ATMOSPHER PHYS,MOSCOW,RUSSIA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU MEZHDUNARODNAYA KNIGA PI MOSCOW PA 39 DIMITROVA UL., 113095 MOSCOW, RUSSIA SN 0002-3515 J9 IZV AN FIZ ATMOS OK+ JI Izv. Akad. Nauk. Fiz. Atmos. Okean. Biol. PD SEP-OCT PY 1993 VL 29 IS 5 BP 657 EP 660 PG 4 WC Meteorology & Atmospheric Sciences; Oceanography SC Meteorology & Atmospheric Sciences; Oceanography GA MH065 UT WOS:A1993MH06500012 ER PT J AU KAWASHIMA, H TRUKHIN, VM LOHR, J HARVEY, RW JAMES, R LUCE, TC PETTY, CC PINSKER, RI PRATER, R AF KAWASHIMA, H TRUKHIN, VM LOHR, J HARVEY, RW JAMES, R LUCE, TC PETTY, CC PINSKER, RI PRATER, R TI X-RAY-ENERGY ANALYSIS FOR RADIO-FREQUENCY CURRENT DRIVE EXPERIMENTS IN THE DIII-D TOKAMAK SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS LA English DT Article DE X-RAY ENERGY SPECTRA; DIII-D TOKAMAK; ELECTRON CYCLOTRON CURRENT DRIVE; FAST WAVE CURRENT DRIVE ID HYBRID CURRENT DRIVE; BREMSSTRAHLUNG EMISSION; RUNAWAY; PLASMA; JFT-2M AB The X-ray energy spectra were measured during electron cyclotron current drive (ECCD) and fast wave current drive (FWCD) experiments in the DIII-D tokamak. High energy electrons, over 100 keV, were observed during ECCD near the plasma center and enhanced radially by the effect of downshifted frequency. Tail formation with the maximum energy of 50 keV was observed clearly during 2 T, 0.8 MA FWCD experiments. For combined FWCD and ECCD, the bulk heating efficiency was increased over the case with FW only, with eta(e) approximately 2.3 x 10(19) m-3 keV/MW, and it was stronger for the counter (CTR) case than the co (Co) case. (Here Co corresponds to the direction of launched wave which will enhance the plasma current. CTR refers to the opposite direction.) However, the coupling of FWs to high energy electrons produced by ECH was stronger for the Co case. C1 JAPAN ATOM ENERGY RES INST,DEPT FUS PLASMA RES,NAKA,IBARAKI 31101,JAPAN. KURCHATOV ATOM ENERGY INST,MOSCOW 123182,RUSSIA. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP KAWASHIMA, H (reprint author), GEN ATOM CO,POB 85608,SAN DIEGO,CA 92186, USA. NR 22 TC 1 Z9 1 U1 0 U2 1 PU JAPAN J APPLIED PHYSICS PI MINATO-KU TOKYO PA DAINI TOYOKAIJI BLDG 24-8 SHINBASHI 4-CHOME, MINATO-KU TOKYO 105, JAPAN SN 0021-4922 J9 JPN J APPL PHYS 1 JI Jpn. J. Appl. Phys. Part 1 - Regul. Pap. Short Notes Rev. Pap. PD SEP PY 1993 VL 32 IS 9A BP 3975 EP 3984 DI 10.1143/JJAP.32.3975 PG 10 WC Physics, Applied SC Physics GA LZ489 UT WOS:A1993LZ48900055 ER PT J AU BALACHANDRAN, U IYER, AN HALDAR, P MOTOWIDLO, LR AF BALACHANDRAN, U IYER, AN HALDAR, P MOTOWIDLO, LR TI THE POWDER-IN-TUBE PROCESSING AND PROPERTIES OF BI-2223 SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY LA English DT Article ID CA-CU-O; CRITICAL CURRENT DENSITIES; SUPERCONDUCTING PROPERTIES; SHEATHED TAPES; WIRES; COILS; PHASE AB Substantial progress has been made in fabricating long lengths of flexible silver-clad high-critical-temperature superconductor tapes by the powder-in-tube method.Tapes with high critical current density (J(c)) that are attractive for electrical power and high-field magnet applications have been produced. At liquid helium (4.2 K) and liquid neon (27 K) temperatures, tapes made by this improved processing method yielded J(c) values greater than 1 00 kA/cm2 at zerofield; at liquid nitrogen temperatures (77 K), the J(c) values exceeded 40 kA/cm2. This article discusses the processing and properties of short-length tapes and of pancake coils made from long-length tapes via ''wind and react.'' C1 INTERMAGNET GEN CORP,WATERBURY,CT. IGC ADV SUPERCOND INC,WATERBURY,CT. RP BALACHANDRAN, U (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. NR 40 TC 30 Z9 30 U1 0 U2 3 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 SEP PY 1993 VL 45 IS 9 BP 54 EP 57 PG 4 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy; Mining & Mineral Processing GA LW185 UT WOS:A1993LW18500013 ER PT J AU GELLER, AS RADER, DJ KEMPKA, SN AF GELLER, AS RADER, DJ KEMPKA, SN TI CALCULATION OF PARTICLE CONCENTRATION AROUND AIRCRAFT-LIKE GEOMETRIES SO JOURNAL OF AEROSOL SCIENCE LA English DT Article AB A computationally-efficient method is presented to calculate local particle concentration enhancements resulting from potential fluid flow around an idealized aircraft fuselage and wing. The geometries chosen for study are a 10:1 prolate ellipsoid at 0-degrees angle of attack and a Joukowski airfoil at 0-degrees and 5-degrees angles of attack, for which potential flow analytic solutions are known. The collection efficiency of and surface concentration on a cylinder in potential flow are also considered for algorithm verification. Particle concentration is calculated along particle pathlines by a mixed Eulerian-Lagrangian technique developed by Fernandez de la Mora and Rosner (1981, Fernandez de la Mora, J. F. and Rosner, D. E, Physico Chem. Hydro. 2, 1). Ordinary differential equations for particle position, velocity, and concentration are integrated numerically by a variable order, backward difference algorithm. The calculations show the creation of regions of increased concentration near objects, and of particle-free shadow zones downstream. The magnitudes of the concentration disturbances are greatest at intermediate Stokes numbers (0.1-1.0) where inertia and drag are equally dominant. Samplers placed in these regions of enhanced particle concentration may not provide accurate concentration measurements. Ultimately, this approach could be included with detailed flow solutions about specific aircraft geometries to provide guidance in locating samplers in regions of acceptably small concentration deviations. RP GELLER, AS (reprint author), SANDIA NATL LABS,DEPT FLUID & THERMAL SCI,ALBUQUERQUE,NM 87185, USA. NR 12 TC 8 Z9 8 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0021-8502 J9 J AEROSOL SCI JI J. Aerosol. Sci. PD SEP PY 1993 VL 24 IS 6 BP 823 EP 834 DI 10.1016/0021-8502(93)90049-F PG 12 WC Engineering, Chemical; Engineering, Mechanical; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA LX122 UT WOS:A1993LX12200009 ER PT J AU DUCKWORTH, DC BARSHICK, CM SMITH, DH AF DUCKWORTH, DC BARSHICK, CM SMITH, DH TI ANALYSIS OF SOILS BY GLOW-DISCHARGE MASS-SPECTROMETRY SO JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY LA English DT Article; Proceedings Paper CT 5TH EUROPEAN WINTER CONF ON PLASMA SPECTROCHEMISTRY CY JAN 10-15, 1993 CL GRANADA, SPAIN DE GLOW DISCHARGE MASS SPECTROMETRY; ELEMENTAL ANALYSIS; SOLID SAMPLING; SOIL ANALYSIS; ENVIRONMENTAL WASTE REMEDIATION ID ELEMENTAL ANALYSIS; ICP-MS AB The analysis of soils by conventional solution-based techniques, such as inductively coupled plasma and thermal ionization mass spectrometry, is complicated by the need for sample dissolution or the combination of a solids atomizer with an auxiliary ionization source. Since time is an important consideration in waste remediation, there exists a need for a method of rapidly analysing many soil samples with little sample preparation; glow discharge mass spectrometry (GDMS) has the potential to meet this need. Because GDMS is a bulk solids technique, sample preparation is simplified in comparison to other methods. It appears that, even with the most difficult samples (geological materials, such as soils and volcanic rock), all that is required is grinding, drying and mixing with a conducting host material prior to electrode formation. As a first test of GDMS for soil analysis, a National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) was analysed by direct current GDMS. Fifty-one elements were quantified from a single cathode using ion beam ratios and 'standard' relative elemental sensitivity factors (RSF). Average errors for the suite of elements were less than a factor of 4 and 1.4 for uncorrected and corrected values, respectively. User-generated RSF values were applied to the analysis of several elements in NIST SRM 2704 Buffalo River Sediment. In the absence of isobaric interferences, accuracies ranging from 0.6 to 73% were observed, demonstrating the potential of the technique for the determination of many elements. The presence of entrained water and inhomogeneity resulting from cathode preparation is thought to affect matrix-to-matrix reproducibility. While further success depends on developing means of circumventing mass spectral interferences and addressing factors affecting plasma chemistry, the immediate goal of developing a screening method for priority metals in soils was met. RP DUCKWORTH, DC (reprint author), OAK RIDGE NATL LAB,DIV ANALYT CHEM,OAK RIDGE,TN 37831, USA. RI Duckworth, Douglas/B-7171-2015 OI Duckworth, Douglas/0000-0002-8161-5685 NR 23 TC 44 Z9 47 U1 0 U2 4 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND CB4 4WF SN 0267-9477 J9 J ANAL ATOM SPECTROM JI J. Anal. At. Spectrom. PD SEP PY 1993 VL 8 IS 6 BP 875 EP 879 DI 10.1039/ja9930800875 PG 5 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA MB548 UT WOS:A1993MB54800019 ER PT J AU REEDY, ED AF REEDY, ED TI FREE-EDGE STRESS INTENSITY FACTOR FOR A BONDED DUCTILE LAYER SUBJECTED TO SHEAR SO JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME LA English DT Article ID INTERFACE CORNER; SINGULARITY; STRENGTH AB The stress state found in a thin, power-law hardening ductile layer bonded between a pair of rigid adherends and subjected to a shear loading is investigated. Within the context of a work-hardening plasticity theory, a stress singularity of type Kr(delta) (delta < 0) exists at the point where the interface between one of the rigid adherends and the ductile layer intersects the stress-free edge. The intensity of this singularity (i. e., K) has been calculated for a plane strain condition using a technique that combines results of an asymptotic analysis of the stress singularity with those of a detailed finite element analysis. A dead-soft aluminum layer is considered first with emphasis placed on an assessment of the region dominated by the plastic stress singularity. Results for a fully plastic layer with negligible elastic strains are presented next. The relation defining the.fully plastic, free-edge stress intensity factor for a shear loading depends only on a characteristic shear stress, layer thickness, and the layer's hardening exponent. RP REEDY, ED (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 16 TC 20 Z9 20 U1 1 U2 2 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0021-8936 J9 J APPL MECH-T ASME JI J. Appl. Mech.-Trans. ASME PD SEP PY 1993 VL 60 IS 3 BP 715 EP 720 DI 10.1115/1.2900863 PG 6 WC Mechanics SC Mechanics GA MA719 UT WOS:A1993MA71900023 ER PT J AU RITLEY, KA LYNN, KG GHOSH, VJ WELCH, DO MCKEOWN, M AF RITLEY, KA LYNN, KG GHOSH, VJ WELCH, DO MCKEOWN, M TI LOW-ENERGY CONTRIBUTIONS TO POSITRON IMPLANTATION SO JOURNAL OF APPLIED PHYSICS LA English DT Article ID MONTE-CARLO CALCULATIONS; THIN METAL-FILMS; CONDENSED MATTER; WORK-FUNCTIONS; KEV ELECTRON; SOLIDS; DIFFUSION; SURFACES; SPECTROSCOPY; DEPENDENCE AB A detailed knowledge of low-energy positron implantation is of considerable importance for depth profiling and data analysis in slow positron experiments. Existing Monte Carlo models are capable of simulating the behavior of positrons incident at keV energies, then following the energy-loss process to final kinetic energies of from 20 to 100 eV. A Monte Carlo calculation of the final stages of positron thermalization in Al, Cu, and Au, from 25 eV to thermal energies, is described via the mechanisms of conduction-electron and longitudinal acoustic-phonon scattering. This calculation produces a wide variety of data, including implantation profiles, fraction and energy distribution of reemitted positrons, and the mean thermalization time. A way to obtain information about positron energy loss by considering the time evolution of a point concentration (delta-function distribution) of positrons is described. Diffusion coefficients are obtained that are in good agreement with experiment. The effects of a positive positron work function are examined in the context of a positron Monte Carlo calculation. It is shown that the latter stages of thermalization can have important effects on the stopping profiles and mean depth. In particular, calculated stopping profiles and mean implantation depth are not adequately described by the Makhovian distribution, in agreement with recent experimental findings. A parameterization of these profiles is provided which will be of use in the analysis of experimental data. C1 UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP RITLEY, KA (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA. NR 50 TC 20 Z9 20 U1 1 U2 4 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-8979 J9 J APPL PHYS JI J. Appl. Phys. PD SEP 1 PY 1993 VL 74 IS 5 BP 3479 EP 3496 DI 10.1063/1.355282 PG 18 WC Physics, Applied SC Physics GA LV391 UT WOS:A1993LV39100077 ER PT J AU SASSER, LB CUSHING, JA DACRE, JC AF SASSER, LB CUSHING, JA DACRE, JC TI DOMINANT LETHAL STUDY OF SULFUR MUSTARD IN MALE AND FEMALE RATS SO JOURNAL OF APPLIED TOXICOLOGY LA English DT Article DE DOMINANT LETHAL; SULFUR MUSTARD ID SALMONELLA; MOUSE; ASSAY AB Sulfur mustard (HD) (bis(2-chloroethyl)sulfide) is a strong alkylating agent with known mutagenic and suspected carcinogenic properties, but occupational health standards have not been established. The purpose of this study was to determine the dominant lethal effect in male and female rats dosed orally with HD, for which currently available data are ambiguous. Sprague-Dawley rats of each sex, 6-7 weeks old, were orally administered 0, 0.08, 0.20 or 0.50 mg kg-1 HD 5 days a week for 10 weeks, after which dominant lethal studies were conducted during the post-exposure period. The studies were conducted in two phases: a female dominant lethal phase in which treated or untreated males were mated with treated females and their fetuses were evaluated 14 days after copulation; and a male dominant lethal phase in which treated males cohabited with untreated females for 5 days and fetuses were evaluated 14 days after the mid-point of the week of cohabitation, for each of 10 weeks. In addition, motility, population size and morphology were measured in sperm obtained from the cauda epididymis. Parental growth rates were reduced in both sexes treated with the high level of HD. Female dominant lethal effects were not observed, although significant male dominant lethal effects were observed in HD-exposed male rats mated to untreated females at 2 and 3 weeks' post-exposure. These effects, which included increases of early fetal resorptions and preimplantation losses and decrease in total live embryo implants, were most consistently observed at a dose of 0.50 mg kg-1. A significant P(P < 0.05) increase in the percentage of abnormal sperm was detected in males exposed to 0.50 mg kg-1 HD. The timing of dominant lethal effects is consistent with an effect during the post-meiotic stages of spermatogenesis, possibly involving the generally sensitive spermatids. C1 USA, BIOMED RES & DEV LAB, DIV HLTH EFFECTS RES, FT DETRICK, FREDERICK, MD 21702 USA. PACIFIC NW LAB, DEPT BIOL & CHEM, RICHLAND, WA 99352 USA. NR 29 TC 12 Z9 12 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0260-437X J9 J APPL TOXICOL JI J. Appl. Toxicol. PD SEP-OCT PY 1993 VL 13 IS 5 BP 359 EP 368 DI 10.1002/jat.2550130511 PG 10 WC Toxicology SC Toxicology GA MA784 UT WOS:A1993MA78400009 PM 8258633 ER PT J AU SMYTH, MJ SPARKS, RL WHARTON, W AF SMYTH, MJ SPARKS, RL WHARTON, W TI PROADIPOCYTE CELL-LINES - MODELS OF CELLULAR PROLIFERATION AND DIFFERENTIATION SO JOURNAL OF CELL SCIENCE LA English DT Note DE DIFFERENTIATION; PROLIFERATION; ADIPOGENESIS; GROWTH ARREST; ADIPOCYTE-SPECIFIC GENE EXPRESSION; FLOW CYTOMETRY ID ENHANCER-BINDING-PROTEIN; MESENCHYMAL STEM-CELLS; INDUCED GENE-EXPRESSION; TISSUE-SPECIFIC EXPRESSION; FLOW CYTOMETRIC ANALYSIS; STEAROYL-COA DESATURASE; TUMOR SUPPRESSOR GENES; SERUM-ALBUMIN GENE; GROWTH-FACTOR-BETA; ADIPOCYTE DIFFERENTIATION C1 TULANE UNIV,SCH MED,DEPT ANAT,GRAD PROGRAM MOLEC & CELLULAR BIOL,NEW ORLEANS,LA 70112. RP SMYTH, MJ (reprint author), LOS ALAMOS NATL LAB,CELL GROWTH DAMAGE & REPAIR GRP,MAIL STOP M888,LOS ALAMOS,NM 87545, USA. FU NCI NIH HHS [CA46683]; NCRR NIH HHS [P41-RR01315] NR 130 TC 37 Z9 38 U1 0 U2 0 PU COMPANY OF BIOLOGISTS LTD PI CAMBRIDGE PA BIDDER BUILDING CAMBRIDGE COMMERCIAL PARK COWLEY RD, CAMBRIDGE, CAMBS, ENGLAND CB4 4DL SN 0021-9533 J9 J CELL SCI JI J. Cell Sci. PD SEP PY 1993 VL 106 BP 1 EP 9 PN 1 PG 9 WC Cell Biology SC Cell Biology GA LZ766 UT WOS:A1993LZ76600001 PM 8270617 ER PT J AU LIU, GK BEITZ, JV HUANG, J AF LIU, GK BEITZ, JV HUANG, J TI GROUND-STATE SPLITTING OF S-STATE ION CM3+ IN LACL3 SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID ELECTRON-PARAMAGNETIC-RES; SPECTRA AB We report optical-spectroscopic studies of the ground-state splitting of the nominal S-state ion Cm3+ in LaCl3. A total splitting of 1.97 +/- 0.05 cm-1 for the 8.S7/2 ground state of this system has been measured for the first time. Both electric and magnetic dipole transitions were observed. Energy levels of all four Kramers doublets of the 8S7/2 manifold were resolved by means of the site-selective excitation ana emission spectra of 8S7/2 <--> 6D7/2 and 8S7/2 <--> 6P5/2 transitions. Our results show that the lowest component of the ground manifold is a mu = 5/2 state dominated by M = \+/- 7/2] in contrast to a previously reported mu = 1/2 state. The crystal-field model, established through analyzing optical spectra of the excited states, predicts a ground-state splitting with the right ordering but greater magnitude. In comparison with the lanthanide S-state ion Gd3+, much stronger spin-orbit coupling and reduced electrostatic interaction in concert with greater crystal field interaction significantly influence the characteristics of the ground state of the actinide S-state ion. Contributions from within the 5f7 configuration account for most of the observed splitting. C1 UNIV WISCONSIN,DEPT PHYS & ASTRON,EAU CLAIRE,WI 54702. RP LIU, GK (reprint author), ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439, USA. NR 24 TC 27 Z9 27 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 SEP 1 PY 1993 VL 99 IS 5 BP 3304 EP 3311 DI 10.1063/1.465139 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200018 ER PT J AU ARNOLD, CC NEUMARK, DM AF ARNOLD, CC NEUMARK, DM TI STUDY OF SI4 AND SI4- USING THRESHOLD PHOTODETACHMENT (ZEKE) SPECTROSCOPY SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID SMALL SILICON CLUSTERS; ULTRAVIOLET PHOTOELECTRON-SPECTRA; POTENTIAL-ENERGY SURFACES; CAS SCF/CI CALCULATIONS; ELECTRONIC-STRUCTURES; NEGATIVE-IONS; GROUND-STATE; ANIONS; SI-3; RESOLUTION AB The threshold photodetachment (ZEKE) spectrum of Si4- is presented. Although no transitions to the ground state of Si4 are observed, we obtain detailed information on the anion and several of the low-lying excited states of neutral Si4. The spectrum shows a long progression of well-resolved transitions between the D2h B-2(2g) rhombus anion and v2 vibrational levels of the first excited D2h B-3(3u) neutral. The length and spacing of the progression is consistent with ab initio calculations performed by Rohlfing and Raghavachari [J. Chem. Phys. 96, 2114 (1992)], but some of the sequence bands observed within the progression are not. We also observe transitions to the Si4 B-1(3u) state which is found at a lower excitation energy than predicted. The perturbed vibrational structure in this band is attributed to vibronic coupling to a nearby electronic state which is ''dark'' with respect to ZEKE spectroscopy. The ZEKE spectra are compared to the previously obtained photoelectron spectra of Si4- as well as ab initio calculations on Si4- and Si4. C1 LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA. RP UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. RI Neumark, Daniel/B-9551-2009 OI Neumark, Daniel/0000-0002-3762-9473 NR 60 TC 116 Z9 118 U1 0 U2 8 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 0021-9606 EI 1089-7690 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 1 PY 1993 VL 99 IS 5 BP 3353 EP 3362 DI 10.1063/1.465145 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200024 ER PT J AU MANTHE, U MILLER, WH AF MANTHE, U MILLER, WH TI THE CUMULATIVE REACTION PROBABILITY AS EIGENVALUE PROBLEM SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID TRANSITION-STATE THEORY; DISCRETE VARIABLE REPRESENTATION; DEPENDENT SCHRODINGER-EQUATION; FLUX AUTOCORRELATION FUNCTION; ABSORBING BOUNDARY-CONDITIONS; MECHANICAL RATE CONSTANTS; THERMAL RATE CONSTANTS; NONSEPARABLE SYSTEMS; QUANTUM; SCATTERING AB It is shown that the cumulative reaction probability for a chemical reaction can be expressed (absolutely rigorously) as N(E) = SIGMA(k)p(k)(E), where {p(k)} are the eigenvalues of a certain Hermitian matrix (or operator). The eigenvalues {P(k)} all lie between 0 and 1 and thus have the interpretation as probabilities, eigenreaction probabilities which may be thought of as the rigorous generalization of the transmission coefficients for the various states of the activated complex in transition state theory. The eigenreaction probabilities {p(k)} can be determined by diagonalizing a matrix that is directly available from the Hamiltonian matrix itself. It is also shown how a very efficient iterative method can be used to determine the eigenreaction probabilities for problems that are too large for a direct diagonalization to be possible. The number of iterations required is much smaller than that of previous methods, approximately the number of eigenreaction probabilities that are significantly different from zero. All of these new ideas are illustrated by application to three model problems-transmission through a one-dimensional (Eckart potential) barrier, the collinear H + H-2 --> H-2 + H reaction, and the three-dimensional version of this reaction for total angular momentum J = 0. C1 LAWRENCE BERKELEY LAB, DIV CHEM SCI, BERKELEY, CA 94720 USA. RP MANTHE, U (reprint author), UNIV CALIF BERKELEY, DEPT CHEM, BERKELEY, CA 94720 USA. RI Manthe, Uwe/A-5877-2011 OI Manthe, Uwe/0000-0002-4845-9633 NR 35 TC 141 Z9 141 U1 0 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 SEP 1 PY 1993 VL 99 IS 5 BP 3411 EP 3419 DI 10.1063/1.465151 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200030 ER PT J AU MCILROY, A TULLY, FP AF MCILROY, A TULLY, FP TI CH+H-2 REACTION-KINETICS - TEMPERATURE AND PRESSURE-DEPENDENCE AND RICE-RAMSPERGER-KASSEL-MARCUS-MASTER-EQUATION CALCULATION SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CH; MECHANISMS AB We investigate the reaction of CH(X2PI) with H-2 as a function of temperature in the range 240-470 K at 8.2 and 750 Torr of helium pressure and as a function of helium pressure in the range 8-750 Torr at 294 K. Methylidyne forms upon excimer-laser photolysis of CHBr3 or CHClBr2 in a slow-flow reactor and we time-resolve its concentration profile using cw laser-induced fluorescence. The title reaction proceeds through the formation of an excited methyl radical with multiple open decay channels. We observe dramatically different temperature dependencies at high and low helium bath-gas pressures. At high pressure, collisional stabilization of CH3* to CH3 dominates the reaction mechanism and the CH-loss rate constant exhibits a negative temperature dependence over the range studied. At low pressure, the predominant product channel switches from CH3 to CH2+H as the temperature increases. We employ a Rice-Ramsperger-Kassel-Marcus-master-equation calculation to model the experimental results. C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551. NR 20 TC 22 Z9 22 U1 1 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 1 PY 1993 VL 99 IS 5 BP 3597 EP 3603 DI 10.1063/1.466156 PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200050 ER PT J AU MA, NL LI, WK NG, CY AF MA, NL LI, WK NG, CY TI A GAUSSIAN-2 AB-INITIO STUDY OF VAN-DER-WAALS DIMERS R1R2 AND THEIR CATIONS R1R2+ (R1,R2=HE,NE,AR, AND KR) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID PHOTOION PHOTOELECTRON COINCIDENCE; BASIS SET; DISSOCIATION-ENERGIES; IONIZATION; MOLECULES; SYSTEMS; CLUSTERS; ERRORS; HF AB Predictions for the ionization energies (I.E.s) of van der Waals dimers R1R2 and the bond dissociation energies (D0's) of the dimer ions R1R2+ (R1, R2=He, Ne, Ar, and Kr) have been calculated using the ab initio Gaussian-2 theoretical procedure. Despite only fair agreements observed between theoretical and experimental geometries, the theoretical I.E.s and D0's are found to be in excellent agreement with available experimental findings. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. RP MA, NL (reprint author), CHINESE UNIV HONG KONG,DEPT CHEM,SHA TIN,HONG KONG. NR 45 TC 33 Z9 33 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 1 PY 1993 VL 99 IS 5 BP 3617 EP 3621 DI 10.1063/1.466159 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200053 ER PT J AU WOON, DE DUNNING, TH AF WOON, DE DUNNING, TH TI CALCULATION OF THE ELECTRON-AFFINITIES OF THE 2ND ROW ATOMS - AL-CL SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID CONFIGURATION-INTERACTION CALCULATIONS; QUANTUM MONTE-CARLO; NEGATIVE-IONS; BASIS-SETS AB The electron affinities (EAs) of aluminum though chlorine have been calculated with multireference single and double excitation configuration interaction calculations (MRSD-CI) with the augmented correlation consistent basis sets of Woon and Dunning V. Chem. Phys. 98, 1358 (1993)]. The orbital space for the complete active space (CAS) wave functions is systematically expanded beyond the Hartree-Fock wave function by inclusion of additional s, p, and d orbitals. This approach provides a well balanced treatment of the neutral and ionic charge states and led to accurate EAs for hydrogen and the first row atoms [R. A. Kendall, T. H. Dunning, Jr., and R. J. Harrison, J. Chem. Phys. 96, 6796 (1992)]. The best MRSD-CI values for the EAs (in eV) of the second row atoms are Al, 0.440; Si, 1.413; P, 0.689; S, 2.023; and Cl, 3.606. Inclusion of spin-orbit effects in the calculated EAs yields (experimental values in parentheses): Al, 0.437 (0.441); Si, 1.395 (1.385); P, 0.700 (0.746); S, 2.019 (-2.0771; and Cl, 3.570 (3.613). The amenability of the correlation consistent basis sets for extrapolating to the complete basis set limit has also been exploited in this work. The neutral and anion energies are extrapolated separately in order to account for the different convergence rates in the energies of the two species. The extrapolated values of the EAs, including an empirical spin-orbit correction, are Al, 0.438; Si, 1.395; P, 0.713; S, 2.047; and Cl, 3.596. Additional calculations suggest that the remaining error is a measure of the residual imbalance in the MRSD-CI treatments of the neutral and anion. Extrapolated EAs for the first row atoms are also reported. RP WOON, DE (reprint author), PACIFIC NW LAB, MOLEC SCI RES CTR, POB 999, RICHLAND, WA 99352 USA. NR 24 TC 69 Z9 69 U1 0 U2 16 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 1 PY 1993 VL 99 IS 5 BP 3730 EP 3737 DI 10.1063/1.466148 PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200066 ER PT J AU ATCHITY, GJ RUEDENBERG, K AF ATCHITY, GJ RUEDENBERG, K TI STRONG SHIFTS IN DIABATIC NONDYNAMIC ELECTRON CORRELATIONS CAUSE CONICAL INTERSECTION BETWEEN LOW-LYING CLOSED-SHELL ADIABATIC SINGLETS OF LIKE SYMMETRY IN OZONE SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY SURFACES; SPACE SCF METHOD; WAVEFUNCTIONS AB Using the quantum chemical construction of diabatic states from adiabatic states formulated in the subsequent paper, the lowest two 1A1 states of ozone are expressed in terms of its diabatic components and the interaction matrix H(ij) between them is determined. An analysis of the electronic structure of the diabatic states leads to an understanding of the reasons for the sip changes in DELTAH and H12 and, hence, for the conical intersection between these two low-lying closed-shell adiabatic states of like symmetry. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. RP ATCHITY, GJ (reprint author), IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. NR 18 TC 35 Z9 35 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 SEP 1 PY 1993 VL 99 IS 5 BP 3790 EP 3798 DI 10.1063/1.466229 PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200069 ER PT J AU RUEDENBERG, K ATCHITY, GJ AF RUEDENBERG, K ATCHITY, GJ TI A QUANTUM-CHEMICAL DETERMINATION OF DIABATIC STATES SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID POTENTIAL-ENERGY SURFACES; BLOCK DIAGONALIZATION; ABINITIO; DEFINITION AB A simple electronic-structure-based construction of diabatic states from adiabatic states is formulated. It is accomplished by maximizing the configurational uniformity of the diabatic states with respect to the dominant configurations throughout the entire coordinate space. No configurational constraints are introduced. No matrix elements of additional, derivative, or nonderivative operators have to be calculated. The matrix elements between the diabatic states are simply expressible in terms of the adiabatic energies and wave function coefficients. C1 IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA. RP RUEDENBERG, K (reprint author), IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. NR 18 TC 82 Z9 82 U1 1 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 SEP 1 PY 1993 VL 99 IS 5 BP 3799 EP 3803 DI 10.1063/1.466125 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200070 ER PT J AU LIE, GC GRIGORAS, S DANG, LX YANG, DY MCLEAN, AD AF LIE, GC GRIGORAS, S DANG, LX YANG, DY MCLEAN, AD TI MONTE-CARLO SIMULATION OF THE LIQUID-VAPOR INTERFACE OF WATER USING AN AB-INITIO POTENTIAL SO JOURNAL OF CHEMICAL PHYSICS LA English DT Article ID MOLECULAR-DYNAMICS SIMULATION; SURFACE-TENSION; DENSITY; LATTICE; ENERGY; FORCES; MODEL AB Monte Carlo calculations have been carried out to study the interfacial properties of liquid water, using the Matsuoka-Clementi-Yoshimine (MCY) potential for the water-water interaction. The surface tension calculated at 29 8 K is 23.7 +/- 3.4 dyn/cm, to be compared with the experimental value of 72 dyn/cm. The interfacial 10-90 thickness is 4.70 angstrom, with the dipoles of the water molecules near the liquid phase pointing slightly towards the liquid phase and those near the gas phase pointing towards the gas phase. The interfacial water molecules are found to be more restricted in their rotation, as evidenced by the smaller root-mean-squared fluctuations of the dipole directions. The Volta potential difference across the interface arising from the permanent dipoles is estimated to be 0.024 V. A new and efficient method is proposed to calculated the surface excess energy. The excess energy calculated for the MCY water is 119 erg/cm2, to be compared with the experimental value of 120 erg/cm2. From the calculated surface excess energy, the temperature variation of the surface tension, or the surface entropy, for the MCY water is estimated to be -0.32 dyn/(cm2 K). This temperature variation is confirmed by another Monte Carlo study at 3 10 K to within the calculated uncertainty. C1 IBM CORP, ALMADEN RES CTR, SAN JOSE, CA 95120 USA. IBM CORP, MIDLAND, MI 48642 USA. PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. ACAD SINICA, INST ATOM & MOLEC SCI, TAIPEI 115, TAIWAN. RP LIE, GC (reprint author), DOW CORNING CORP, CENT RES & DEV, CO41B1, MIDLAND, MI 48686 USA. RI Yang, Dah-Yen/F-7928-2012 NR 39 TC 40 Z9 40 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 SEP 1 PY 1993 VL 99 IS 5 BP 3933 EP 3937 DI 10.1063/1.466139 PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200084 ER PT J AU ABASCAL, JLF SASSI, AP BLANCH, HW PRAUSNITZ, JM AF ABASCAL, JLF SASSI, AP BLANCH, HW PRAUSNITZ, JM TI MONTE-CARLO SIMULATIONS OF A HYDROPHOBIC WEAK POLYELECTROLYTE - CHARGE-DISTRIBUTION AS A FUNCTION OF CONFORMATION SO JOURNAL OF CHEMICAL PHYSICS LA English DT Note C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RI Abascal, Jose Luis/A-4138-2008 OI Abascal, Jose Luis/0000-0002-0304-3407 NR 2 TC 1 Z9 1 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 1 PY 1993 VL 99 IS 5 BP 4231 EP 4232 DI 10.1063/1.466227 PG 2 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200123 ER PT J AU DATSKOS, PG CHRISTOPHOROU, LG CARTER, JG AF DATSKOS, PG CHRISTOPHOROU, LG CARTER, JG TI EFFECT OF TEMPERATURE ON THE ATTACHMENT OF SLOW (LESS-THAN-OR-EQUAL-TO-1 EV) ELECTRONS TO CH3BR (VOL 97, PG 9031, 1992) SO JOURNAL OF CHEMICAL PHYSICS LA English DT Correction, Addition RP DATSKOS, PG (reprint author), OAK RIDGE NATL LAB,MAIL STOP 6122,POB 2008,OAK RIDGE,TN 37831, USA. NR 1 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 0021-9606 J9 J CHEM PHYS JI J. Chem. Phys. PD SEP 1 PY 1993 VL 99 IS 5 BP 4238 EP 4238 DI 10.1063/1.466078 PG 1 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA LU722 UT WOS:A1993LU72200127 ER PT J AU DETERESA, SJ AF DETERESA, SJ TI ON THE ELASTIC BUCKLING OF ROD-SHAPED PARTICLES IN SHEARED SUSPENSIONS SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Article ID FIBER RP DETERESA, SJ (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV MAT,POB 808,MS L-338,LIVERMORE,CA 94550, USA. NR 12 TC 0 Z9 0 U1 1 U2 1 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD SEP PY 1993 VL 159 IS 2 BP 400 EP 404 DI 10.1006/jcis.1993.1339 PG 5 WC Chemistry, Physical SC Chemistry GA LT334 UT WOS:A1993LT33400017 ER PT J AU REINELT, DA KRAYNIK, AM AF REINELT, DA KRAYNIK, AM TI LARGE ELASTIC DEFORMATIONS OF 3-DIMENSIONAL FOAMS AND HIGHLY CONCENTRATED EMULSIONS SO JOURNAL OF COLLOID AND INTERFACE SCIENCE LA English DT Article ID SHEAR MODULUS; LIQUID FOAM; RHEOLOGY; STRESS; SYSTEM; MODEL; FROTH; CELL C1 SANDIA NATL LABS,CTR ENGN SCI,DEPT 1512,ALBUQUERQUE,NM 87185. RP REINELT, DA (reprint author), SO METHODIST UNIV,DEPT MATH,DALLAS,TX 75275, USA. NR 18 TC 49 Z9 49 U1 2 U2 4 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0021-9797 J9 J COLLOID INTERF SCI JI J. Colloid Interface Sci. PD SEP PY 1993 VL 159 IS 2 BP 460 EP 470 DI 10.1006/jcis.1993.1347 PG 11 WC Chemistry, Physical SC Chemistry GA LT334 UT WOS:A1993LT33400025 ER PT J AU FELLER, D FEYEREISEN, MW AF FELLER, D FEYEREISEN, MW TI AB-INITIO STUDY OF HYDROGEN-BONDING IN THE PHENOL WATER-SYSTEM SO JOURNAL OF COMPUTATIONAL CHEMISTRY LA English DT Article ID MOLECULAR-ORBITAL METHODS; NONADDITIVE INTERMOLECULAR POTENTIALS; BASIS-SETS; WAVE-FUNCTIONS; POLARIZABLE WATER; 1ST-ROW ELEMENTS; DYNAMICS; ENERGIES; SPECTROSCOPY; SOLVATION AB Three hydrogen-bonded minima on the phenol-water, C6H5OH-H2O, Potential energy surface were located with 3-21G and 6-31G** basis sets at both Hartree-Fock and MP2 levels of theory. MP2 binding energies were computed using large ''correlation consistent'' basis sets that included extra diffuse functions on all atoms. An estimate of the effect of expanding the basis set to the triple-zeta level (multiple f functions on carbon and oxygen and multiple d functions on hydrogen) was derived from calculations on a related prototype system. The best estimates of the electronic binding energies for the three minima are -7.8, -5.0, and -2.0 kcal/mol. The consequences of uncertainties in the geometries and limitations in the level of correlation recovery are analyzed. It is suggested that our best estimates will likely underestimate the complete basis set, full Cl values by 0.1-0.3 kcal/mol. Vibrational normal modes were determined for all three minima, including an MP2/6-31G** analysis for the most strongly bound complex. Computational strategies for larger phenol-water complexes are discussed. (C) 1993 by John Wiley & Sons, Inc. C1 CRAY RES INC, EAGAN, MN 55121 USA. RP FELLER, D (reprint author), PACIFIC NW LAB, THEORY MODELING & SIMULAT MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. NR 31 TC 98 Z9 99 U1 0 U2 4 PU WILEY-BLACKWELL PI HOBOKEN PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA SN 0192-8651 EI 1096-987X J9 J COMPUT CHEM JI J. Comput. Chem. PD SEP PY 1993 VL 14 IS 9 BP 1027 EP 1035 DI 10.1002/jcc.540140904 PG 9 WC Chemistry, Multidisciplinary SC Chemistry GA LR799 UT WOS:A1993LR79900003 ER PT J AU BRACKBILL, JU AF BRACKBILL, JU TI AN ADAPTIVE-GRID WITH DIRECTIONAL CONTROL SO JOURNAL OF COMPUTATIONAL PHYSICS LA English DT Article ID PARTIAL-DIFFERENTIAL EQUATIONS; FINITE-ELEMENT; GENERATION; SYSTEMS; DIMENSIONS RP LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. NR 34 TC 116 Z9 118 U1 0 U2 5 PU ACADEMIC PRESS INC ELSEVIER SCIENCE PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA SN 0021-9991 EI 1090-2716 J9 J COMPUT PHYS JI J. Comput. Phys. PD SEP PY 1993 VL 108 IS 1 BP 38 EP 50 DI 10.1006/jcph.1993.1161 PG 13 WC Computer Science, Interdisciplinary Applications; Physics, Mathematical SC Computer Science; Physics GA LW445 UT WOS:A1993LW44500005 ER PT J AU LILIENTALWEBER, Z KANEYAMA, T TERAUCHI, M TANAKA, M AF LILIENTALWEBER, Z KANEYAMA, T TERAUCHI, M TANAKA, M TI APPLICATION OF CONVERGENT-BEAM ILLUMINATION METHODS TO THE STUDY OF LATTICE DISTORTION ACROSS THE INTERFACE SO JOURNAL OF CRYSTAL GROWTH LA English DT Article ID LOW-TEMPERATURES; EPITAXY; DEFECTS AB Convergent beam illumination methods were applied to the study of the lattice parameter change in the GaAs layers grown by molecular beam epitaxy (MBE) at 195-degrees-C (called LT-GaAs layers) with 1.5% of As excess. This excess of As leads to the lattice parameter change. Tetragonal distortion with a change of the lattice parameter along the growth direction was observed in four independently measured samples. The strain accumulated in the layer would explain the formation of pyramidal defects in these layers at a specific layer thickness related to the As concentration. An artifact due to the surface relaxation of the TEM thin foil is also considered. Surface relaxation was found to be present in the sample and the model was presented for the explanation of Kikuchi line shifts in the large-angle convergent-beam electron diffraction (LACBED) pattern and convergent-beam imaging methods (CBIM) pattern. The lowering the symmetry of CBED patterns from tetragonal to orthorombic observed in this study is most possible influenced by surface relaxation as well, however, the fact that similar results were obtained on four independent samples leaves this question still open for the future study. C1 JEOL LTD,TOKYO 196,JAPAN. TOHOKU UNIV,INST SCI MEASUREMENTS,SENDAI,MIYAGI 980,JAPAN. RP LILIENTALWEBER, Z (reprint author), LAWRENCE BERKELEY LAB,DIV MAT SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. RI Liliental-Weber, Zuzanna/H-8006-2012 NR 16 TC 5 Z9 5 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-0248 J9 J CRYST GROWTH JI J. Cryst. Growth PD SEP PY 1993 VL 132 IS 1-2 BP 103 EP 114 DI 10.1016/0022-0248(93)90252-R PG 12 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA LU691 UT WOS:A1993LU69100012 ER PT J AU BRANDON, S DERBY, JJ ATHERTON, LJ ROBERTS, DH VITAL, RL AF BRANDON, S DERBY, JJ ATHERTON, LJ ROBERTS, DH VITAL, RL TI 3-DIMENSIONAL HEAT-TRANSFER EFFECTS DURING THE GROWTH OF LICAALF6 IN A MODIFIED BRIDGMAN FURNACE SO JOURNAL OF CRYSTAL GROWTH LA English DT Article ID CZOCHRALSKI CRYSTAL-GROWTH; NUMERICAL-SIMULATION; SINGLE-CRYSTALS; LASER MATERIAL; MODEL; CONVECTION; GAAS; SEGREGATION; MELT; CONFIGURATION AB A novel process modification, the simultaneous growth of three cylindrical Cr: LiCaAlF6 (Cr: LiCAF) crystals grown from a common seed in a vertical Bridgman furnace of rectangular cross section, is assessed using computational modeling. The analysis employs the FIDAP finite-element package and accounts for three-dimensional, steady-state, conductive heat transfer throughout the system. The induction heating system is rigorously simulated via solution of Maxwell's equations. The implementation of realistic thermal boundary conditions and furnace details is shown to be important. Furnace design features are assessed through calculations, and simulations indicate expected growth conditions to be favorable. In addition, the validity of using ampoules containing ''dummy'' charges for experimental furnace characterization measurements is examined through test computations. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP BRANDON, S (reprint author), UNIV MINNESOTA,DEPT CHEM ENGN & MAT SCI,MINNEAPOLIS,MN 55455, USA. RI Derby, Jeffrey/B-9706-2009; OI Derby, Jeffrey/0000-0001-6418-2155 NR 50 TC 13 Z9 13 U1 1 U2 3 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 SEP PY 1993 VL 132 IS 1-2 BP 261 EP 279 DI 10.1016/0022-0248(93)90270-7 PG 19 WC Crystallography; Materials Science, Multidisciplinary; Physics, Applied SC Crystallography; Materials Science; Physics GA LU691 UT WOS:A1993LU69100030 ER PT J AU EISLER, GR ROBINETT, RD SEGALMAN, DJ FEDDEMA, JD AF EISLER, GR ROBINETT, RD SEGALMAN, DJ FEDDEMA, JD TI APPROXIMATE OPTIMAL TRAJECTORIES FOR FLEXIBLE-LINK MANIPULATOR SLEWING USING RECURSIVE QUADRATIC-PROGRAMMING SO JOURNAL OF DYNAMIC SYSTEMS MEASUREMENT AND CONTROL-TRANSACTIONS OF THE ASME LA English DT Article ID MOVING BASE; DYNAMICS AB The method of recursive quadratic programming, coupled with a homotopy method, has been used to generate approximate minimum-time and minimum tracking-error tip trajectories for two-link flexible manipulator movements in the horizontal plane. The manipulator is modeled with an efficient finite-element scheme for a multi-link, multi-joint system with bending only in the horizontal-plane. Constraints on the trajectory include boundary conditions on link tip position, final joint velocities, accelerations and torque inputs to complete a rest-to-rest maneuver, straight-line tip tracking between boundary positions, and motor torque limits. Trajectory comparisons demonstrate the impact of torque input smoothness on structural mode excitation. Applied torques retain much of the qualitative character of rigid-body slewing motion with alterations for energy dissipation. RP EISLER, GR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 19 TC 14 Z9 14 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0022-0434 J9 J DYN SYST-T ASME JI J. Dyn. Syst. Meas. Control-Trans. ASME PD SEP PY 1993 VL 115 IS 3 BP 405 EP 410 DI 10.1115/1.2899116 PG 6 WC Automation & Control Systems; Instruments & Instrumentation SC Automation & Control Systems; Instruments & Instrumentation GA MA123 UT WOS:A1993MA12300013 ER PT J AU SHOOK, M AF SHOOK, M TI PLEASANT BAYOU GEOPRESSURED-GEOTHERMAL RESERVOIR ANALYSIS-OCTOBER 1991 SO JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME LA English DT Discussion RP SHOOK, M (reprint author), IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0195-0738 J9 J ENERG RESOUR-ASME JI J. Energy Resour. Technol.-Trans. ASME PD SEP PY 1993 VL 115 IS 3 BP 237 EP 237 DI 10.1115/1.2906000 PG 1 WC Energy & Fuels SC Energy & Fuels GA LZ871 UT WOS:A1993LZ87100014 ER PT J AU HANSON, AT DWYER, B SAMANI, ZA YORK, D AF HANSON, AT DWYER, B SAMANI, ZA YORK, D TI REMEDIATION OF CHROMIUM-CONTAINING SOILS BY HEAP LEACHING - COLUMN STUDY SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE LA English DT Article AB Efforts are being made to devise technologies and treatment systems to remediate contaminated soil on site without generating significant wastes for off-site disposal. Heap leaching, a technique used extensively in the mining industry, has been investigated as a method for remediation of hazardous metal contamination of the vadose zone. In the mining industry, metal bearing ore is excavated and mounded on a pad. The metals are removed by passing a special leaching solution through the ore. In this study, the removal of Chromium (VI) from four New Mexico soils (sand, sandy loam, and clay) using heap leaching was evaluated at a column scale. The heap leaching study demonstrated greater than 99% removal of Cr(VI), using tap water as the leaching agent. The soils were typical of arid climate soils with low organic content (<1%). C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP HANSON, AT (reprint author), NEW MEXICO STATE UNIV,DEPT CIVIL ENGN,LAS CRUCES,NM 88003, USA. NR 15 TC 19 Z9 19 U1 0 U2 5 PU ASCE-AMER SOC CIVIL ENGINEERS PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017-2398 SN 0733-9372 J9 J ENVIRON ENG-ASCE JI J. Environ. Eng.-ASCE PD SEP-OCT PY 1993 VL 119 IS 5 BP 825 EP 841 DI 10.1061/(ASCE)0733-9372(1993)119:5(825) PG 17 WC Engineering, Environmental; Engineering, Civil; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA LY858 UT WOS:A1993LY85800006 ER PT J AU CONGDON, JD SELS, RCV AF CONGDON, JD SELS, RCV TI RELATIONSHIPS OF REPRODUCTIVE TRAITS AND BODY-SIZE WITH ATTAINMENT OF SEXUAL MATURITY AND AGE IN BLANDINGS TURTLES (EMYDOIDEA-BLANDINGI) SO JOURNAL OF EVOLUTIONARY BIOLOGY LA English DT Article DE EMYDOIDEA-BLANDINGI; AGE; BODY SIZE AND CLUTCH SIZE AT MATURITY; LONGEVITY; REPRODUCTION; TURTLE AB To place associations among body size, age at maturity, age, and reproductive traits of a long-lived organism in the context of current life history models based on the concept of norms of reaction, we examined data from a mark-recapture study of Blanding's turtles (Emydoidea blandingi) in southeastern Michigan during 24 of the years between 1953 and 1988. Females matured between 14 and 20 years of age. Both the smallest and largest adult females in the population were reproducing for the first time in their lives. This result suggests that a combination of differences in juvenile growth rates and ages at maturity, and not indeterminate growth, are the primary cause of variation in body size among adults. Body size variation among individuals was not related to age at sexual maturity. Females that had slower growth rates as juveniles matured later at similar mean body size compared to those with more rapid growth that matured at an earlier age. As a result, a linear model of age at sexual maturity with growth rates of primiparous females between hatching and maturity was significant and negative (R2 = 0.76). Frequency of reproduction of the largest and smallest females was not significantly different. Clutch size did not vary significantly with age among either primiparous or multiparous females. Clutch sizes of primiparous females and multiparous females were not significantly different. However, older females (> 55 years minimum age) reproduced more frequently than did younger females (minimum age < 36 y). RP CONGDON, JD (reprint author), SAVANNAH RIVER ECOL LAB,DRAWER E,AIKEN,SC 29801, USA. NR 0 TC 56 Z9 56 U1 7 U2 24 PU BIRKHAUSER VERLAG AG PI BASEL PA PO BOX 133 KLOSTERBERG 23, CH-4010 BASEL, SWITZERLAND SN 1010-061X J9 J EVOLUTION BIOL JI J. Evol. Biol. PD SEP PY 1993 VL 6 IS 4 BP 547 EP 557 DI 10.1046/j.1420-9101.1993.6040547.x PG 11 WC Ecology; Evolutionary Biology; Genetics & Heredity SC Environmental Sciences & Ecology; Evolutionary Biology; Genetics & Heredity GA MA473 UT WOS:A1993MA47300006 ER PT J AU THOMASSEN, KI GOLDSTON, RJ NEILSON, GH AF THOMASSEN, KI GOLDSTON, RJ NEILSON, GH TI A PROGRAMMATIC FRAMEWORK FOR THE TOKAMAK PHYSICS EXPERIMENT (TPX) SO JOURNAL OF FUSION ENERGY LA English DT Article DE PROGRAMMATIC FRAMEWORK; TOKAMAK PHYSICS EXPERIMENT AB Significant advances have been made in the confinement of reactor-grade plasmas, so that we are now preparing for experiments at the ''power breakeven'' level in the JET and TFTR experiments. In ITER we will extend the performance of tokamaks into the burning plasma regime, develop the technology of fusion reactors, and produce over a gigawatt of fusion power. Besides taking these crucial steps toward the technical feasibility of fusion, we must also take steps to ensure its economic acceptability. The broad requirements for economically attractive tokamak reactors based on physics advancements have been set forth in a number of studies. An advanced physics data base is emerging from a physics program of concept improvement using existing tokamaks around the world. This concept improvements program is emerging as the primary focus of the U.S. domestic tokamak program, and a key element of that program is the proposed Tokamak Physics Experiment (TPX). With TPX we can develop the scientific data base for compact, continuously-operating fusion reactors, using advanced steady-state control techniques to improve plasma performance. We can develop operating techniques needed to ensure the success of ITER and provide first-time experience with several key fusion reactor technologies. This paper explains the relationships of TPX to the current U.S. fusion physics program, to the ITER program, and to the development of an attractive tokamak demonstration plant for this next stage in the fusion program. RP THOMASSEN, KI (reprint author), UNIV CALIF DAVIS,LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA, USA. NR 0 TC 4 Z9 4 U1 0 U2 0 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0164-0313 J9 J FUSION ENERG JI J. Fusion Energy PD SEP PY 1993 VL 12 IS 3 BP 215 EP 219 DI 10.1007/BF01079666 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA MR802 UT WOS:A1993MR80200001 ER PT J AU SCHMIDT, JA THOMASSEN, KI GOLDSTON, RJ NEILSON, GH NEVINS, WM SINNIS, JC ANDERSON, P BAIR, W BARR, WL BATCHELOR, DB BAXI, C BERG, G BERNABEI, S BIALEK, JM BONOLI, PT BOOZER, A BOWERS, D BRONNER, G BROOKS, JN BROWN, TG BULMER, R BUTNER, D CAMPBELL, R CASPER, T CHANIOTAKIS, E CHAPLIN, M CHEN, SJ CHIN, E CHRZANOWSKI, J CITROLO, J COLE, MJ DAHLGREN, F DAVIS, FC DAVIS, J DAVIS, S DIATCHENKO, N DINKEVICH, S FELDSHTEYN, Y FELKER, B FENG, T FENSTERMACHER, ME FLEMING, R FOGARTY, PJ FRAGETTA, W FREDD, E GABLER, M GALAMBOS, J GOHAR, Y GORANSON, PL GREENOUGH, N GRISHAM, LR HAINES, J HANEY, S HASSENZAHL, W HEIM, J HEITZENROEDER, PJ HILL, DN HODAPP, T HOULBERG, WA HUBBARD, A HYATT, A JACKSON, M JAEGER, EF JARDIN, SC JOHNSON, J JONES, GH JULIANO, DR JUNGE, R KALISH, M KESSEL, CE KNUTSON, D LAHAYE, RJ LANG, DD LANGLEY, RA LIEW, SL LU, E MANTZ, H MANICKAM, J MAU, TK MEDLEY, S MIKKELSEN, DR MILLER, R MONTICELLO, D MORGAN, D MOROZ, P MOTLOCH, C MUELLER, J MYATT, L NELSON, BE NEUMEYER, CL NILSON, D OCONNER, T PEARLSTEIN, LD PEEBLES, WA PELOVITZ, M PERKINS, FW PERKINS, LJ PETERSEN, D PILLSBURY, R POLITZER, PA POMPHREY, N PORKOLAB, M POSEY, A RADOVINSKY, A RAFTOPOULIS, S RAMAKRISHNAN, S RAMOS, J RAUCH, W RAVENSCROFT, D REDLER, K REIERSEN, WT REIMAN, A REIS, E REWOLDT, G RICHARDS, DJ ROCCO, R ROGNLIEN, TD RUZIC, D SABBAGH, S SAPP, J SAYER, RO SCHARER, JE SCHMITZ, L SCHULTZ, J SEVIER, L SHIPLEY, SE SIMMONS, RT SLACK, D SMITH, GR STAMBAUGH, R STEILL, G STEVENSON, T STOENESCU, S STONGE, KT STOTLER, DP STRAIT, T STRICKLER, DJ SWAIN, DW TANG, W TUSZEWSKI, M ULRICKSON, MA VONHALLE, A WALKER, MS WANG, C WANG, P WARREN, J WERLEY, KA WEST, WP WILLIAMS, F WONG, R WRIGHT, K WURDEN, GA YUGO, JJ ZAKHAROV, L ZBASNIK, J AF SCHMIDT, JA THOMASSEN, KI GOLDSTON, RJ NEILSON, GH NEVINS, WM SINNIS, JC ANDERSON, P BAIR, W BARR, WL BATCHELOR, DB BAXI, C BERG, G BERNABEI, S BIALEK, JM BONOLI, PT BOOZER, A BOWERS, D BRONNER, G BROOKS, JN BROWN, TG BULMER, R BUTNER, D CAMPBELL, R CASPER, T CHANIOTAKIS, E CHAPLIN, M CHEN, SJ CHIN, E CHRZANOWSKI, J CITROLO, J COLE, MJ DAHLGREN, F DAVIS, FC DAVIS, J DAVIS, S DIATCHENKO, N DINKEVICH, S FELDSHTEYN, Y FELKER, B FENG, T FENSTERMACHER, ME FLEMING, R FOGARTY, PJ FRAGETTA, W FREDD, E GABLER, M GALAMBOS, J GOHAR, Y GORANSON, PL GREENOUGH, N GRISHAM, LR HAINES, J HANEY, S HASSENZAHL, W HEIM, J HEITZENROEDER, PJ HILL, DN HODAPP, T HOULBERG, WA HUBBARD, A HYATT, A JACKSON, M JAEGER, EF JARDIN, SC JOHNSON, J JONES, GH JULIANO, DR JUNGE, R KALISH, M KESSEL, CE KNUTSON, D LAHAYE, RJ LANG, DD LANGLEY, RA LIEW, SL LU, E MANTZ, H MANICKAM, J MAU, TK MEDLEY, S MIKKELSEN, DR MILLER, R MONTICELLO, D MORGAN, D MOROZ, P MOTLOCH, C MUELLER, J MYATT, L NELSON, BE NEUMEYER, CL NILSON, D OCONNER, T PEARLSTEIN, LD PEEBLES, WA PELOVITZ, M PERKINS, FW PERKINS, LJ PETERSEN, D PILLSBURY, R POLITZER, PA POMPHREY, N PORKOLAB, M POSEY, A RADOVINSKY, A RAFTOPOULIS, S RAMAKRISHNAN, S RAMOS, J RAUCH, W RAVENSCROFT, D REDLER, K REIERSEN, WT REIMAN, A REIS, E REWOLDT, G RICHARDS, DJ ROCCO, R ROGNLIEN, TD RUZIC, D SABBAGH, S SAPP, J SAYER, RO SCHARER, JE SCHMITZ, L SCHULTZ, J SEVIER, L SHIPLEY, SE SIMMONS, RT SLACK, D SMITH, GR STAMBAUGH, R STEILL, G STEVENSON, T STOENESCU, S STONGE, KT STOTLER, DP STRAIT, T STRICKLER, DJ SWAIN, DW TANG, W TUSZEWSKI, M ULRICKSON, MA VONHALLE, A WALKER, MS WANG, C WANG, P WARREN, J WERLEY, KA WEST, WP WILLIAMS, F WONG, R WRIGHT, K WURDEN, GA YUGO, JJ ZAKHAROV, L ZBASNIK, J TI THE DESIGN OF THE TOKAMAK PHYSICS EXPERIMENT (TPX) SO JOURNAL OF FUSION ENERGY LA English DT Article AB The Tokamak Physics Experiment is designed to develop the scientific basis for a compact and continuously operating tokamak fusion reactor. It is based on an emerging class of tokamak operating modes, characterized by beta limits well in excess of the Troyon limit, confinement scaling well in excess of H-mode, and bootstrap current fractions approaching unity. Such modes are attainable through the use of advanced, steady state plasma controls including strong shaping, current profile control, and active particle recycling control. Key design features of the TPX are superconducting toroidal and poloidal fields coils; actively-cooled plasma-facing components; a flexible heating and current drive system; and a spacious divertor for flexibility. Substantial deuterium plasma operation is made possible with an in-vessel remote maintenance system, a low-activation titanium vacuum vessel, and shielding of ex-vessel components. The facility will be constructed as a national project with substantial participation by U.S. industry. Operation will begin with first plasma in the year 2000. RP SCHMIDT, JA (reprint author), PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. RI Jardin, Stephen/E-9392-2010; pomphrey, neil/G-4405-2010; Sabbagh, Steven/C-7142-2011; Stotler, Daren/J-9494-2015; Wurden, Glen/A-1921-2017 OI Stotler, Daren/0000-0001-5521-8718; Wurden, Glen/0000-0003-2991-1484 NR 0 TC 7 Z9 7 U1 0 U2 2 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0164-0313 J9 J FUSION ENERG JI J. Fusion Energy PD SEP PY 1993 VL 12 IS 3 BP 221 EP 258 DI 10.1007/BF01079667 PG 38 WC Nuclear Science & Technology SC Nuclear Science & Technology GA MR802 UT WOS:A1993MR80200002 ER PT J AU MOODY, JD BALDIS, HA MONTGOMERY, DS ESTABROOK, K DIXIT, S LABAUNE, C AF MOODY, JD BALDIS, HA MONTGOMERY, DS ESTABROOK, K DIXIT, S LABAUNE, C TI BEAM SMOOTHING EFFECTS ON STIMULATED RAMAN AND BRILLOUIN BACKSCATTERING IN LASER-PRODUCED PLASMAS SO JOURNAL OF FUSION ENERGY LA English DT Article DE BEAM SMOOTHING; STIMULATED RAMAN SCATTERING; STIMULATED BRILLOUIN SCATTERING AB We describe plasma physics experiments using the Nova laser that investigate the temporal and spectral characteristics of directly backscattered laser light. The stimulated Raman and Brillouin instabilities are studied for a variety of plasma conditions, drive laser intensities, and beam smoothing conditions. The experimental facility, beam smoothing techniques, and some experimental results are described. RP MOODY, JD (reprint author), UNIV CALIF DAVIS,LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. OI Montgomery, David/0000-0002-2355-6242 NR 0 TC 4 Z9 4 U1 0 U2 4 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0164-0313 J9 J FUSION ENERG JI J. Fusion Energy PD SEP PY 1993 VL 12 IS 3 BP 323 EP 330 DI 10.1007/BF01079677 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA MR802 UT WOS:A1993MR80200012 ER PT J AU FARRIS, MH RUSSELL, CT THOMSEN, MF AF FARRIS, MH RUSSELL, CT THOMSEN, MF TI MAGNETIC-STRUCTURE OF THE LOW-BETA, QUASI-PERPENDICULAR SHOCK SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID MACH NUMBER SHOCKS; ISEE-2 OBSERVATIONS; BOW SHOCKS; COLLISIONLESS SHOCKS; REFLECTED IONS; WAVES; UPSTREAM; OVERSHOOTS; FIELD; THERMALIZATION AB ISEE 1 and 2 magnetic field measurements are used to examine the structure of the low beta, quasi-perpendicular shock. A shock crossing database consisting of ISEE 1 satellite crossings from the beginning of the mission in 1977 to the end of 1980 is utilized to identify shock crossings for this study. A set of 20 low beta, quasi-perpendicular shock crossings are drawn from the database for study. Analysis of the shock overshoots indicates that the strength of the overshoot of low beta, quasi-perpendicular shocks increases as the ratio of the Mach number to the first critical Mach number (or ratio of criticality) increases. There are subcritical crossings which have nonnegligible overshoots and other subcritical crossings which exhibit no overshoot. Wave analysis shows that the power of the downstream waves also increases as a function of this ratio of criticality. Upstream of the shock, large-amplitude, low-frequency whistler mode and higher-frequency (f approximately 1 Hz) whistler waves are evident for subcritical and marginally critical shocks. The lower-frequency whistlers are right-hand elliptically polarized and phase stand upstream of the shock, propagating along the shock normal direction. The thickness of the shock is found to be within a factor of 1 and 2 times greater than the wavelength of this precursor wave. This result is inconsistent with the conjecture that the shock is merely the last amplified cycle of the precursor wave, for if this were true, the thickness of the shock from minimum to maximum would be one half of the precursor wavelength. The 1-Hz waves are right-hand elliptically polarized and propagate upstream obliquely to the magnetic field direction. Downstream of the marginally critical and supercritical shock, left-hand elliptically polarized waves are found to propagate along the magnetic field direction and have frequencies of about 0.2-0.8 f(ci). These ion cyclotron waves appear to result from the excitation of the Alfven ion cyclotron (AIC) instability. The AIC instability is driven by the T(i perpendicular-to) > T(i parallel-to) temperature anisotropy created in front of the shock by the reflection of solar wind ions. Ion cyclotron waves act to pitch angle scatter the ions downstream of the shock and remove the temperature anisotropy. A transitional behavior in the noncoplanar component of the magnetic field occurs at or about the first critical Mach number. Below the critical Mach number, the noncoplanar component is associated with the upstream whistler train. When the ratio of criticality is approximately unity, the noncoplanar component is isolated from any upstream or downstream wave activity. In the supercritical regime, this component of the field is associated with the downstream ion cyclotron wave train. For all ranges of criticality, the noncoplanar component is seen to lie within the shock ramp, and the transitional behavior of this component of the field indicates that it is an inherent part of the shock. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP FARRIS, MH (reprint author), UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY PHYS,DEPT EARTH & SPACE SCI,LOS ANGELES,CA 90024, USA. NR 34 TC 62 Z9 62 U1 1 U2 5 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 SEP 1 PY 1993 VL 98 IS A9 BP 15285 EP 15294 DI 10.1029/93JA00958 PG 10 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LW353 UT WOS:A1993LW35300020 ER PT J AU THOMSEN, MF THOMAS, VA WINSKE, D GOSLING, JT FARRIS, MH RUSSELL, CT AF THOMSEN, MF THOMAS, VA WINSKE, D GOSLING, JT FARRIS, MH RUSSELL, CT TI OBSERVATIONAL TEST OF HOT FLOW ANOMALY FORMATION BY THE INTERACTION OF A MAGNETIC DISCONTINUITY WITH THE BOW SHOCK SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID DIAMAGNETIC CAVITIES UPSTREAM; PLASMA STRUCTURES; CURRENT SHEET; SOLAR-WIND; IONS AB The formation of a hot flow anomaly (HFA) observed near the Earth's bow shock appears to be due to the interaction between the bow shock and an impinging discontinuity in the upstream plasma. Recent single-particle and two-dimensional hybrid numerical studies have suggested that such an interaction will produce an HFA only if the motional electric field in the ambient plasma points toward the discontinuity, thereby focusing shock-reflected ions into it. We perform a test of this electric field orientation for a set of nine HFA events observed by the ISEE spacecraft and described previously in the literature. The principal difficulty with the test is the determination of the normals to the discontinuities. Application of a minimum variance analysis produces discontinuity normals which suggest that the majority of the discontinuities were probably tangential, even though it is doubtful that the conditions for validity are very well satisfied for these events. Under the assumption that the discontinuities were tangential, the predicted electric field orientation is found on at least one side of all nine observed HFAs (on the trailing edge of seven and the leading edge of five, and on both sides of three events). Further, there is evidence that asymmetries in the observed magnetic field signatures are related to the orientation of the motional electric field: The events in which the electric field points toward the discontinuity on both sides tend to be those with fairly symmetric flanking magnetic field enhancements. Two-dimensional hybrid simulations appear to confirm the association between the magnetic field signature and the electric field orientations, and they show further that rotational discontinuities appear to be less effective at producing distinct HFA-like signatures than tangential discontinuities. C1 UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY PHYS,LOS ANGELES,CA 90024. RP THOMSEN, MF (reprint author), LOS ALAMOS NATL LAB,MS F645,LOS ALAMOS,NM 87545, USA. NR 16 TC 50 Z9 51 U1 1 U2 2 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 SEP 1 PY 1993 VL 98 IS A9 BP 15319 EP 15330 DI 10.1029/93JA00792 PG 12 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LW353 UT WOS:A1993LW35300023 ER PT J AU SLAVIN, JA SMITH, MF MAZUR, EL BAKER, DN HONES, EW IYEMORI, T GREENSTADT, EW AF SLAVIN, JA SMITH, MF MAZUR, EL BAKER, DN HONES, EW IYEMORI, T GREENSTADT, EW TI ISEE-3 OBSERVATIONS OF TRAVELING COMPRESSION REGIONS IN THE EARTHS MAGNETOTAIL SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID DEEP GEOMAGNETIC TAIL; DISTANT MAGNETOTAIL; PLASMA SHEET; MAGNETIC-FIELD; NEAR-EARTH; MAGNETOSPHERIC SUBSTORMS; BOUNDARY-LAYER; RECONNECTION; SIMULATION; EXPANSION AB A traveling compression region (TCR) is a several-minute long compression of the lobe magnetic field produced by a plasmoid as it moves down the tail. They are generally followed by a longer interval of southward tilting magnetic fields. This study reports the first comprehensive survey of TCRs in the distant magnetotail. A total of 116 TCRs were identified in the ISEE 3 magnetic field observations. Of this population, 37 TCRs were observed to be separated by 30 min or more from any other TCR and are termed ''isolated'' events. ''Paired'' events are defined as two TCRs separated by less than 30 min. There were 36 such TCRs corresponding to 18 paired events. ''Multiple'' events were also observed in which more than two TCRs occurred in a series without a gap between TCRs of more than 30 min. The 11 multiple events identified in this study had an average of about four traveling compression regions each for a total of 43 TCRs. The mean amplitude, DELTAB/B, and duration, DELTAT, for all TCRs were found to be 7.6% and 158 s, respectively. TCRs occurring as isolated events were the largest (DELTAB/B = 8.8% and DELTAT = 218 s) and those associated with multiple events were the smallest (DELTAB/B = 5.6% and DELTAT = 84 s). The mean duration of the period of southward tilting B(z) following isolated TCRs was 12.3 min. This time interval was found to be quite similar to the average spacing between TCRs in paired and multiple events, 11.2 and 10.2 min, respectively. TCR amplitude and duration were found to be independent of location within the tail lobes suggesting that the plasmoids which cause the TCRs maintain approximately constant volume and shape as they move down the tail. Mean plasmoid dimensions estimated from TCR duration and amplitude under the assumption of a quasi-rigid magnetopause are 35 R(E) (length) x 15 R(E) (width) x 15 R(E) (height). Utilizing auroral kilometric radiation, the AL index, Pi 2 pulsations at two ground stations, and energetic particle data from three geosynchronous spacecraft. it is found that over 91% of the TCR events identified in this study followed substorm onsets or intensifications. The number of TCR events identified in this study are consistent with their release in association with a new substorm onset every 4-6 hrs. The results of this study strongly suggest that the release of plasmoids down the tail near the time of expansion phase onset is an integral step in the substorm process and an important element in the substorm energy budget. C1 HUGHES STX INC,LANHAM,MD. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. KYOTO UNIV,FAC SCI,DATA ANAL CTR GEOMAGNET & SPACE MAGNET,KYOTO 606,JAPAN. TRW CO INC,DEPT SPACE SCI,REDONDO BEACH,CA 90278. RP SLAVIN, JA (reprint author), NASA,GODDARD SPACE FLIGHT CTR,EXTRATERR PHYS LAB,CODE 696,GREENBELT,MD 20771, USA. RI Slavin, James/H-3170-2012 OI Slavin, James/0000-0002-9206-724X NR 51 TC 136 Z9 137 U1 1 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 SEP 1 PY 1993 VL 98 IS A9 BP 15425 EP 15446 DI 10.1029/93JA01467 PG 22 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LW353 UT WOS:A1993LW35300033 ER PT J AU SCHINDLER, K BIRN, J AF SCHINDLER, K BIRN, J TI ON THE CAUSE OF THIN CURRENT SHEETS IN THE NEAR-EARTH MAGNETOTAIL AND THEIR POSSIBLE SIGNIFICANCE FOR MAGNETOSPHERIC SUBSTORMS SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID GROWTH-PHASE; MAGNETIC RECONNECTION; RESISTIVITY MODELS; PLASMA SHEET; TAIL; MAGNETOPAUSE; INSTABILITY; MECHANISM; VELOCITY; SHEAR AB The formation of thin current sheets in the near-Earth magnetotail during substorm growth phases is addressed in terms of a simple model. An appropriate part of the unperturbed magnetotail is represented by a plane sheet model. Perturbations are applied to the upper and to the left boundaries, representing the magnetopause and the near-Earth tail boundary, where the perturbation at the latter models the interaction between the tail and the inner magnetosphere. Treating the perturbation as ideal (dissipation-free), we found that singular current sheets develop in the midplane of the tail. The analytical results are explored numerically. Using realistic dimensions of the domain considered, the influence of the earthward boundary on current sheet formation dominates. It is argued that current sheet formation of this type plays an important role in the processes associated with the onset of magnetospheric substorms. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP SCHINDLER, K (reprint author), RUHR UNIV BOCHUM,D-44780 BOCHUM,GERMANY. NR 38 TC 69 Z9 69 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 SEP 1 PY 1993 VL 98 IS A9 BP 15477 EP 15485 DI 10.1029/93JA01047 PG 9 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LW353 UT WOS:A1993LW35300036 ER PT J AU ONSAGER, TG THOMSEN, MF ELPHIC, RC GOSLING, JT ANDERSON, RR KETTMANN, G AF ONSAGER, TG THOMSEN, MF ELPHIC, RC GOSLING, JT ANDERSON, RR KETTMANN, G TI ELECTRON GENERATION OF ELECTROSTATIC-WAVES IN THE PLASMA SHEET BOUNDARY-LAYER SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS LA English DT Article ID DISTANT MAGNETOTAIL; ION DISTRIBUTIONS; ISEE OBSERVATIONS; EARTHS FORESHOCK; NOISE; BEAM; INSTABILITIES; TAIL; LOBE; SIMULATIONS AB Broadband electrostatic noise (BEN) is a common feature of the plasma sheet boundary layer in the Earth's magnetotail. Observationally, BEN has been shown to occur in conjunction with ion beams. Consequently, extensive research has been done investigating the possible ion beam-related instabilities that could generate the observed wave spectra, It has also been demonstrated that unstable electron distribution functions are sometimes measured in the plasma sheet boundary layer. We present simultaneous observations of ion and electron distribution functions and electric field wave spectra measured by ISEE 1 and ISEE 2 in the Earth's magnetotail. For this study we have used particularly slow traversals of the boundary layer where the distinct electron and ion boundaries can be clearly resolved. As the spacecraft moved from the tail lobe toward the plasma sheet, the first indication of boundary layer plasma was seen in the electron distributions, followed some minutes later by the detection of boundary layer ions. The onset of large-amplitude electrostatic waves at frequencies up to the electron plasma frequency was coincident with the onset of the boundary layer electrons. This evidence suggests that broadband electrostatic waves may often be generated by unstable electron distributions in the plasma sheet boundary layer, particularly the high-frequency portion of the wave spectrum. The lower-frequency waves are found to be polarized perpendicular to the background magnetic field, consistent with previous observations. The higher-frequency waves (near the electron plasma frequency) had perpendicular polarization when the amplitudes were low and parallel polarization when the amplitudes were high. The observed changes in the electron distribution functions indicate that the plasma was not heated locally by the waves. C1 UNIV NEW HAMPSHIRE,DEPT PHYS,DURHAM,NH 03824. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV IOWA,DEPT PHYS & ASTRON,IOWA CITY,IA 52242. MAX PLANCK INST AERON,LINDAU,GERMANY. RP ONSAGER, TG (reprint author), UNIV NEW HAMPSHIRE,INST STUDY EARTH OCEANS & SPACE,DURHAM,NH 03824, USA. NR 41 TC 37 Z9 37 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 SEP 1 PY 1993 VL 98 IS A9 BP 15509 EP 15519 DI 10.1029/93JA00921 PG 11 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LW353 UT WOS:A1993LW35300039 ER PT J AU HAGAMAN, EW AF HAGAMAN, EW TI C-13-F-19 DIPOLAR DEPHASING IN MONOFLUORINATED ORGANIC-SUBSTANCES - CHARACTERIZATION BY H-1-C-13-F-19 TRIPLE-RESONANCE C-13 CP/MAS AND F-19 MAS NMR SO JOURNAL OF MAGNETIC RESONANCE SERIES A LA English DT Article ID CROSS-POLARIZATION NMR; SOLID-STATE; RESOLUTION; COUPLINGS; SPECTRA RP HAGAMAN, EW (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. NR 16 TC 23 Z9 23 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 1064-1858 J9 J MAGN RESON SER A JI J. Magn. Reson. Ser. A PD SEP PY 1993 VL 104 IS 2 BP 125 EP 131 DI 10.1006/jmra.1993.1200 PG 7 WC Physics, Atomic, Molecular & Chemical SC Physics GA LY246 UT WOS:A1993LY24600001 ER PT J AU JANKOWSKI, AF AF JANKOWSKI, AF TI SUPERHARDNESS EFFECT IN AU/NI MULTILAYERS SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 1ST INTERNATIONAL SYMP ON METALLIC MULTILAYERS ( MML 93 ) CY MAR 01-05, 1993 CL KYOTO, JAPAN SP JAPAN INST MET, RES INST PROD DEV ID ENHANCED ELASTIC-MODULUS; PROPERTY RELATIONSHIPS; GOLD-NICKEL; SUPERLATTICES; HARDNESS; FOILS; FILMS; PALLADIUM; SUBSTRATE; STRAIN AB The presence of an enhanced hardness, that is, a 'superhardness effect', is found as a behavior parallel to the supermodulus effect in Au/Ni multilayer structures. The submicron-thick Au/Ni coatings are prepared by magnetron sputter deposition. A microindenter is used to measure load as a function of indentation depth. An increase in hardness is measured as the Au/Ni layer pair spacing decreases. A local maximum in hardness occurs for samples with layer pairs consisting of 4-6 atomic planes of each metal component. RP JANKOWSKI, AF (reprint author), LAWRENCE LIVERMORE NATL LAB,DEPT CHEM & MAT SCI,POB 808,L-350,LIVERMORE,CA 94550, USA. NR 24 TC 16 Z9 16 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD SEP PY 1993 VL 126 IS 1-3 BP 185 EP 191 DI 10.1016/0304-8853(93)90577-O PG 7 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA MD354 UT WOS:A1993MD35400051 ER PT J AU HOMMA, H ALP, EE AF HOMMA, H ALP, EE TI APPLICATION OF MULTILAYERS OF (SNO2)-SN-119/(SNO2)-SN-120 TO A COHERENT NUCLEAR RESONANT MONOCHROMATOR FOR SYNCHROTRON-RADIATION - DESIGN SO JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS LA English DT Article; Proceedings Paper CT 1ST INTERNATIONAL SYMP ON METALLIC MULTILAYERS ( MML 93 ) CY MAR 01-05, 1993 CL KYOTO, JAPAN SP JAPAN INST MET, RES INST PROD DEV AB We have designed multilayered nuclear monochromators of (SnO2)-Sn-119/(SnO2)-Sn-120 with a modulation wavelength of 20-40 angstrom and 25-50 bilayers as an alternative method to a grazing-incidence antireflection thin film. Our goal is to fabricate a monochromator for a synchrotron radiation source, and to achieve a nuclear reflectivity of approximately 0.3 at a relatively high incidence angle of approximately 7 mrad with an energy resolution of approximately 0.5 mueV (i.e. 10GAMMA, where GAMMA = 5.15 x 10(-8) eV). C1 ARGONNE NATL LAB,ADV PHOTON SOURCE,ARGONNE,IL 60439. RP HOMMA, H (reprint author), CUNY BROOKLYN COLL,DEPT PHYS,2900 BEDFORD AVE,BROOKLYN,NY 11210, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-8853 J9 J MAGN MAGN MATER JI J. Magn. Magn. Mater. PD SEP PY 1993 VL 126 IS 1-3 BP 593 EP 594 DI 10.1016/0304-8853(93)90696-Y PG 2 WC Materials Science, Multidisciplinary; Physics, Condensed Matter SC Materials Science; Physics GA MD354 UT WOS:A1993MD35400170 ER PT J AU HOLESINGER, TG MILLER, DJ VISWANATHAN, HK CHUMBLEY, LS AF HOLESINGER, TG MILLER, DJ VISWANATHAN, HK CHUMBLEY, LS TI SOLIDIFICATION OF BI2SR2CACU2OY AND BI2SR1.75CA0.25CUOY SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID CA-CU-O; PHASE-EQUILIBRIA; WIRES; CRYSTALLIZATION; BI2SR2CA1CU2OX; SUPERCONDUCTOR; DIFFRACTION; BEHAVIOR; GLASSES; OXYGEN AB The solidification processes for the compositions Bi2Sr2CaCu2Oy (2212) and Bi2Sr1.75Ca0.25CuOy (2201) were determined as a function of oxygen partial pressure. During solidification in argon, the superconducting phases were generally not observed to form for either composition. In both cases, the solidus is lowered to approximately 750-degrees-C. Solidification of Bi2Sr1.75Ca0.25CuOy in Ar resulted in a divorced eutectic structure of Bi2Sr2-xCaxOy (22x) and Cu2O while solidification of Bi2Sr2CaCu2Oy in Ar resulted in a divorced eutectic structure of Bi2Sr3-xCaxOy (23x) and Cu2O. Solidification of Bi2Sr1.75Ca0.25CuOy in O2 resulted in large grains of 2201 interspersed with small regions containing the eutectic structure of 22x and CuO/Cu2O. Solidification of Bi2Sr2CaCu2Oy in partial pressures of 1%, 20%, and 100% oxygen resulted in multiphase samples consisting of 2212, 2201, some alkaline-earth cuprates, and both divorced eutectic structures found during solidification in Ar. For both compositions, these latter structures can be attributed to oxygen deficiencies present in the melt regardless of the overpressure of oxygen. These eutectic structures are unstable and convert into the superconducting phases during subsequent anneals in oxygen. The formation process of the 2212 phase during solidification from the melt was determined to proceed through an intermediate state involving the 2201 phase. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP HOLESINGER, TG (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 23 TC 20 Z9 20 U1 0 U2 2 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 SEP PY 1993 VL 8 IS 9 BP 2149 EP 2161 DI 10.1557/JMR.1993.2149 PG 13 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600006 ER PT J AU KUNG, PJ WU, XD MUENCHAUSEN, RE SALAZAR, KV FOLTYN, SR PETERSON, DE GARCIA, AR AF KUNG, PJ WU, XD MUENCHAUSEN, RE SALAZAR, KV FOLTYN, SR PETERSON, DE GARCIA, AR TI THE EFFECT OF POSTANNEALING ON LASER-DEPOSITED SUPERCONDUCTING BI-SR-CA-CU-O THIN-FILMS SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID HIGH-TC PHASE; INSITU; GROWTH; OXYGEN; SYSTEM; OXIDE; 2223-PHASE; (BI AB Superconducting Bi-Sr-Ca-Cu-O thin films were obtained from post-annealing partially crystallized and amorphous films grown on MgO(100) by pulsed laser deposition. The substrate temperature investigated was in the range of 350-750-degrees-C, over a range of pressure 0.1 to 100 mTorr. The as-deposited films were annealed in 7.5 vol. % O2/Ar or in air at 800-865-degrees-C from several minutes to a few hours. Unlike the pure Bi2Sr2CaCu2O8+delta (2212) phase (T(c) = 80 K) which is easily formed after a long continuous period of post-annealing at a temperature below 830-degrees-C, the formation of (Bi, Pb)2Sr2Ca2Cu3O10+delta (2223) phase from the as-deposited amorphous films requires repetitive annealing cycles of short duration in air at 850-degrees-C to simultaneously achieve good crystal quality, small surface roughness, and sharp diamagnetic transition (T(c) = 110 K). After annealing, the temperature is lowered down to approximately 650-degrees-C by quenching in air and then a slow-cooling step is employed. This procedure was found to enhance the volume fraction of the 2223 phase as compared with a direct slow-cooling process. The trade-off between annealing temperature and time was observed to affect the phase formation and the smoothness of the annealed films. To optimize the post-annealing conditions, Rutherford backscattering spectrometry, x-ray diffraction, and scanning electron microscopy were systematically used to examine the composition, structure, and morphology of the films, respectively. RP KUNG, PJ (reprint author), LOS ALAMOS NATL LAB,CTR SUPERCONDUCT TECHNOL,LOS ALAMOS,NM 87545, USA. NR 31 TC 1 Z9 1 U1 0 U2 0 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 SEP PY 1993 VL 8 IS 9 BP 2162 EP 2169 DI 10.1557/JMR.1993.2162 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600007 ER PT J AU FOX, GR KRUPANIDHI, SB MORE, KL AF FOX, GR KRUPANIDHI, SB MORE, KL TI COMPOSITION STRUCTURE-PROPERTY RELATIONS OF MULTI-ION-BEAM REACTIVE SPUTTERED LEAD LANTHANUM TITANATE THIN-FILMS .2. TEXTURED MICROSTRUCTURE DEVELOPMENT SO JOURNAL OF MATERIALS RESEARCH LA English DT Article AB This paper, the second of three parts, presents a detailed analysis of the crystallographic texture observed in lead lanthanum titanate (PLT) thin films deposited by multi-ion-beam reactive sputtering. Since films were deposited at a substrate temperature of 100-degrees-C, they exhibit an amorphous structure that can be described by the structure zone model. The as-deposited microstructure is transformed via crystallization of the perovskite phase and PbO evaporation during postdeposition annealing. Transmission electron microscopy was used to determine that phase pure PLT films develop textured clusters (as large as 700 nm in diameter) consisting of [100] aligned 10 nm nanocrystals. As excess PbO is added to the PLT film, the textured cluster size decreases until only isolated PLT nanocrystals exist. Below a critical quantity of excess PbO in the as-deposited film (approximately 15 mole %), the textured cluster structure produces a [100] texture through the film thickness, which generates x-ray diffraction patterns typical of textured microstructures. At high PbO contents, the excess PbO causes the formation of clusters that are smaller than the film thickness, resulting in a polycrystalline-type x-ray diffraction pattern. A qualitative model describing microstructure development is presented. C1 PENN STATE UNIV,DEPT ENGN SCI & MECH,UNIV PK,PA 16802. PENN STATE UNIV,MAT RES LAB,UNIV PK,PA 16802. OAK RIDGE NATL LAB,HIGH TEMP MAT LAB,OAK RIDGE,TN 37830. RI More, Karren/A-8097-2016 OI More, Karren/0000-0001-5223-9097 NR 14 TC 10 Z9 10 U1 0 U2 1 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 SEP PY 1993 VL 8 IS 9 BP 2191 EP 2202 DI 10.1557/JMR.1993.2191 PG 12 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600011 ER PT J AU MCGUIRE, SM FINE, ME BUCK, O ACHENBACH, JD AF MCGUIRE, SM FINE, ME BUCK, O ACHENBACH, JD TI NONDESTRUCTIVE DETECTION OF FATIGUE CRACKS IN PM-304 STAINLESS-STEEL BY INTERNAL-FRICTION AND ELASTICITY SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID DEFORMATION AB A resonant frequency mechanical vibration method was used to nondestructively detect fatigue crack initiation in notched 304 stainless steel samples prepared by powder metallurgy. This method allowed the determination of an effective elastic modulus and the direct measurement of internal friction. Changes in the modulus and internal friction were found to correlate well with the presence of 50 mum long fatigue cracks. The length of the through cracks initiated at the notch was measured using surface replicas, which were examined in a scanning electron microscope. Small crack growth rate data were also obtained and plotted versus the stress intensity factor. The crack growth rates were compared with long crack data performed on compact tension samples of this material. The short cracks grew at intensity factors below the long crack threshold stress intensity factor. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. RP MCGUIRE, SM (reprint author), NORTHWESTERN UNIV,CTR QUAL ENGN & FAILURE PREVENT,DEPT MAT SCI & ENGN,EVANSTON,IL 60208, USA. RI Achenbach, Jan/B-6746-2009; Fine, Morris/B-7516-2009 NR 12 TC 36 Z9 36 U1 1 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 SEP PY 1993 VL 8 IS 9 BP 2216 EP 2223 DI 10.1557/JMR.1993.2216 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600013 ER PT J AU DEGUIRE, MR DORRIS, SE POEPPEL, RB MORISSETTE, S BALACHANDRAN, U AF DEGUIRE, MR DORRIS, SE POEPPEL, RB MORISSETTE, S BALACHANDRAN, U TI COPRECIPITATION SYNTHESIS OF DOPED LANTHANUM CHROMITE SO JOURNAL OF MATERIALS RESEARCH LA English DT Article AB Two coprecipitation methods were used to synthesize powder precursors of doped lanthanum chromite (La, Ca)(Cr, Co)O3. The effects of synthesis method and calcination temperature on the composition, sintered density, and microstructure of pressed compacts of (La, Ca)(Cr, Co)O3 were studied by differential thermal analysis/thermogravimetric analysis, x-ray diffraction, scanning electron microscopy, and density measurement. The cation ratios in the precipitated solids were, with few exceptions, within experimental error of the desired compositions for all four components. Powders obtained by both techniques could be sintered to densities exceeding 93% at 1400-degrees-C. The highest densities were obtained with calcining temperatures from 450 to 700-degrees-C. The sintered microstructures exhibited uniform grain sizes averaging 3-5 mum. The Cr(VI) compounds, CaCrO4 and La2CrO6, were observed in all of the calcined powders. The possible role of these phases on chromite densification is discussed. C1 ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439. RP DEGUIRE, MR (reprint author), CASE WESTERN RESERVE UNIV,DEPT MAT SCI & ENGN,CLEVELAND,OH 44106, USA. NR 28 TC 14 Z9 15 U1 0 U2 5 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 SEP PY 1993 VL 8 IS 9 BP 2327 EP 2334 DI 10.1557/JMR.1993.2327 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600030 ER PT J AU NGUYEN, T HO, HL KOTECKI, DE NGUYEN, TD AF NGUYEN, T HO, HL KOTECKI, DE NGUYEN, TD TI REACTION STUDY OF COBALT AND SILICON-NITRIDE SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID SELF-ALIGNED TISI2; FILMS; SIO2; DIFFUSION; COSI2; SI3N4; NISI2; TI; CO AB The interaction of cobalt (Co) and low-pressure chemical-vapor-deposited silicon nitride (LPCVD Si3N4) during anneals from 200-degrees-C-1000-degrees-C in vacuum, Ar, and Ar-H-2 ambient (95% Ar and 5% H2) has been studied. After the anneals, reduction of Si3N4 by Co to form cobalt silicide and cobalt nitride phases has been observed. Reduction of Si3N4 initially occurs at 600-degrees-C; however, gross physical damage occurs at temperatures of approximately 900-degrees-C in Ar. The addition of hydrogen to the ambient enhances the onset of physical damage to the nitride film by as much as 200-degrees-C. Mechanisms governing the CO/Si3N4 reaction have been proposed. C1 LAWRENCE BERKELEY LAB,CTR XRAY OPT,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720. RP NGUYEN, T (reprint author), IBM CORP,CTR SEMICOND RES DEV,HOPEWELL JCT,NY 12533, USA. NR 22 TC 10 Z9 10 U1 1 U2 9 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 SEP PY 1993 VL 8 IS 9 BP 2354 EP 2361 DI 10.1557/JMR.1993.2354 PG 8 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600033 ER PT J AU MAO, XL PERRY, DL RUSSO, RE AF MAO, XL PERRY, DL RUSSO, RE TI CA(1-X)NIXO CATALYTIC THIN-FILMS PREPARED BY PULSED-LASER DEPOSITION SO JOURNAL OF MATERIALS RESEARCH LA English DT Article ID LOW-TEMPERATURE OXYDEHYDROGENATION; SUPERCONDUCTING FILMS; EVAPORATION; METHANE; VAPORIZATION; SELECTIVITY; CONVERSION AB Ca(1-x)NixO solid-solution films with varying stoichiometry have been prepared by pulsed laser deposition from sintered targets of NiO and CaO. X-ray diffraction data indicate that the films have the structure of sodium chloride. The lattice constants for different stoichiometries vary with film composition. Using the Madelung energy as the binding energy between anions and cations and assuming that nickel and calcium ions are distributed randomly in lattice sites, the lattice constants were calculated and found to compare with experimental results. This study investigated the compositional changes that occur during the target sintering process and the pulsed laser deposition of films. Using these data, a target composition can be prepared to produce Ca(1-x)NixO thin films with any desired lattice constant. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 21 TC 7 Z9 7 U1 0 U2 0 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 SEP PY 1993 VL 8 IS 9 BP 2400 EP 2403 DI 10.1557/JMR.1993.2400 PG 4 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600038 ER PT J AU SHELDON, BW BESMANN, TM MORE, KL MOSS, TS AF SHELDON, BW BESMANN, TM MORE, KL MOSS, TS TI EPITAXIAL NUCLEATION OF POLYCRYSTALLINE SILICON-CARBIDE DURING CHEMICAL-VAPOR-DEPOSITION, (VOL 8, PG 1086, 1993) SO JOURNAL OF MATERIALS RESEARCH LA English DT Correction, Addition C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37830. OAK RIDGE ASSOCIATED UNIV,OAK RIDGE,TN 37831. RP SHELDON, BW (reprint author), BROWN UNIV,DIV ENGN,PROVIDENCE,RI 02912, USA. RI More, Karren/A-8097-2016 OI More, Karren/0000-0001-5223-9097 NR 1 TC 1 Z9 1 U1 0 U2 0 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 SEP PY 1993 VL 8 IS 9 BP 2416 EP 2418 DI 10.1557/JMR.1993.2416 PG 3 WC Materials Science, Multidisciplinary SC Materials Science GA LU576 UT WOS:A1993LU57600041 ER PT J AU SPITZIG, WA BINER, SB AF SPITZIG, WA BINER, SB TI COMPARISON OF STRENGTHENING IN WIRE-DRAWN OR ROLLED CU-20-PERCENT NB WITH A DISLOCATION ACCUMULATION MODEL SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID PROCESSED COMPOSITE-MATERIALS; MICROSTRUCTURE; ALLOYS; SIZE AB Strengthening after large deformations by wire-drawing or rolling of Cu, Nb and Cu-20% Nb was compared with the predictions of a proposed modified substructural strengthening model for ductile two-phase alloys. The comparisons indicate that the more extensive and refined model of Funkenbusch and Courtney offers no improvement over the original model of Ashby in predicting the strengthening with increased deformation processing or the dislocation densities necessary to produce the observed strengthening in Cu-20% Nb. Both models can predict the strengthening behaviour of Cu-20% Nb. However, neither model is in accord with the observations that the dislocation density in the Cu matrix is essentially independent of the degree of deformation processing, and that the magnitudes of the dislocation density are much the same in the Cu in Cu-20% Nb and pure Cu identically deformation-processed. In addition, there is no experimental support for the Funkenbusch and Courtney model prediction of an order of magnitude greater dislocation density in the Nb filaments than in the Cu matrix in Cu-20% Nb. It appears that a mechanism that does not require an accumulation of dislocations for strengthening, such as the difficulty in propagating dislocations between closely spaced barriers, is more likely to be responsible for strengthening in Cu-Nb-type deformation-processed composites. RP IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA. NR 29 TC 8 Z9 11 U1 0 U2 0 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0022-2461 EI 1573-4803 J9 J MATER SCI JI J. Mater. Sci. PD SEP 1 PY 1993 VL 28 IS 17 BP 4623 EP 4629 DI 10.1007/BF00414250 PG 7 WC Materials Science, Multidisciplinary SC Materials Science GA LW174 UT WOS:A1993LW17400011 ER PT J AU KIM, DJ KROEGER, DM AF KIM, DJ KROEGER, DM TI OPTIMIZATION OF CRITICAL-CURRENT DENSITY OF BULK YBCO SUPERCONDUCTOR PREPARED BY COPRECIPITATION IN OXALIC-ACID SO JOURNAL OF MATERIALS SCIENCE LA English DT Article ID TRANSPORT CRITICAL CURRENT; YBA2CU3OX SUPERCONDUCTORS; OXIDE SUPERCONDUCTORS; GRAIN-BOUNDARIES; Y1BA2CU3OX; POWDER; SIZE; BA2YCU3O7-X; TEMPERATURE; SAMPLES AB YBa2Cu3O7-x (YBCO) superconductor powder was prepared from mixtures of solutions containing yttrium, barium, and copper nitrates by coprecipitation in oxalic acid. Single-phase YBCO was obtained from a solution mixture of 14 vol % excess of barium nitrate and 12 vol % excess of copper nitrate relative to the stoichiometry of YBCO. The optimal pH in the coprecipitation process was determined to be 6.6-6.7 which was obtained by using 12 vol % excess oxalic acid anhydrous solution of the required oxalic acid to convert all metal cations to oxalates and adding a dilute ammonium hydroxide solution. The measurement of critical current density, J(c), of bulk YBCO prepared by the coprecipitation, showed a trend that the J(c) increased together with the degree of orthorhombic distortion of YBCO phase which depended on the sample density and the content of impurity phases. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP KIM, DJ (reprint author), KOREA INST SCI & TECHNOL,DIV CERAM,SEOUL 136791,SOUTH KOREA. NR 26 TC 9 Z9 9 U1 1 U2 3 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 SEP 1 PY 1993 VL 28 IS 17 BP 4744 EP 4748 DI 10.1007/BF00414267 PG 5 WC Materials Science, Multidisciplinary SC Materials Science GA LW174 UT WOS:A1993LW17400028 ER PT J AU CHEN, WYC LOUCK, JD AF CHEN, WYC LOUCK, JD TI THE FACTORIAL SCHUR FUNCTION SO JOURNAL OF MATHEMATICAL PHYSICS LA English DT Article ID HYPERGEOMETRIC ORTHOGONAL POLYNOMIALS; RACAH COEFFICIENTS; SUMMATION THEOREM; TENSOR-OPERATORS; INVARIANT-THEORY; PELL EQUATION; Q-ANALOG; SERIES; SU(N); U(N) AB The application of the divided difference of a function to the inhomogeneous symmetric functions (factorial Schur functions) of Biedenharn and Louck is shown to lead to new relations and simplified proofs of their properties. These results include determinantal definitions and the factorial Jacobi-Trudi identities with extensions to skew versions. Similar properties of a second class of symmetric functions depending on an arbitrary parameter, and of importance for generalized hypergeometric functions and series, are shown also to be derivable from the divided difference notion, slightly extended. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP CHEN, WYC (reprint author), LOS ALAMOS NATL LAB,C-3,MAIL STOP B265,LOS ALAMOS,NM 87545, USA. NR 48 TC 15 Z9 15 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0022-2488 J9 J MATH PHYS JI J. Math. Phys. PD SEP PY 1993 VL 34 IS 9 BP 4144 EP 4160 DI 10.1063/1.530032 PG 17 WC Physics, Mathematical SC Physics GA LV187 UT WOS:A1993LV18700023 ER PT J AU ARRAGE, AA PHELPS, TJ BENOIT, RE PALUMBO, AV WHITE, DC AF ARRAGE, AA PHELPS, TJ BENOIT, RE PALUMBO, AV WHITE, DC TI BACTERIAL SENSITIVITY TO UV-LIGHT AS A MODEL FOR IONIZING-RADIATION RESISTANCE SO JOURNAL OF MICROBIOLOGICAL METHODS LA English DT Article DE AEROBIC BACTERIA; MICROAEROPHILIC BACTERIA; GAMMA RADIATION; IONIZING RADIATION; SUBSURFACE; UV LIGHT ID DEEP SUBSURFACE ENVIRONMENTS; SEDIMENTS; DIVERSITY AB Six bacterial isolates from the U.S. DOE Subsurface Science Program and three reference bacteria were tested for resistance to UV light and gamma radiation. The subsurface isolates included three aerobic, pigmented, Gram positive bacteria and three microaerophilic, non-pigmented, Gram negative bacteria. Deinococcus radiodurans was the most resistant bacterium to both types of radiation, with a D37 value of 4.0 x 10(4) muWS CM-2 to UV light and 300 krads to gamma radiation. The aerobic subsurface bacteria were found to be significantly more resistant (p < 0.05) than the microaerophilic subsurface bacteria to UV light and gamma radiation. Due to the similarities of bacterial survival between UV and gamma radiation; it is proposed that UV light could be utilized to model the fate of microorganisms exposed to ionizing radiation. C1 UNIV TENNESSEE,CTR ENVIRONM BIOTECHNOL,10515 RES DR,SUITE 300,KNOXVILLE,TN 37932. VIRGINIA POLYTECH INST & STATE UNIV,DEPT BIOL,BLACKSBURG,VA 24061. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. RI Palumbo, Anthony/A-4764-2011; phelps, tommy/A-5244-2011 OI Palumbo, Anthony/0000-0002-1102-3975; NR 19 TC 13 Z9 13 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-7012 J9 J MICROBIOL METH JI J. Microbiol. Methods PD SEP PY 1993 VL 18 IS 2 BP 127 EP 136 DI 10.1016/0167-7012(93)90029-H PG 10 WC Biochemical Research Methods; Microbiology SC Biochemistry & Molecular Biology; Microbiology GA LX503 UT WOS:A1993LX50300006 ER PT J AU KITTEL, JH FROST, BRT MUSTELIER, JP BAGLEY, KQ CRITTENDEN, GC VANDIEVOET, J AF KITTEL, JH FROST, BRT MUSTELIER, JP BAGLEY, KQ CRITTENDEN, GC VANDIEVOET, J TI HISTORY OF FAST-REACTOR FUEL DEVELOPMENT SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB The first fast breeder reactors, constructed in the 1945-1960 time period, used metallic fuels composed of uranium, plutonium, or their alloys. They were chosen because most existing reactor operating experience had been obtained on metallic fuels and because they provided the highest breeding ratios. Difficulties in obtaining adequate dimensional stability in metallic fuel elements under conditions of high fuel burnup led in the 1960s to the virtual worldwide choice of ceramic fuels. Although ceramic fuels provide lower breeding performance, this objective is no longer an important consideration in most national programs. Mixed uranium and plutonium dioxide became the ceramic fuel that has received the widest use. The more advanced ceramic fuels, mixed uranium and plutonium carbides and nitrides, continue under development. More recently, metal fuel elements of improved design have joined ceramic fuels in achieving goal burnups of 15 to 20 percent. Low-swelling fuel cladding alloys have also been continuously developed to deal with the unexpected problem of void formation in stainless steels subjected to fast neutron irradiation, a phenomenon first observed in the 1960s. C1 COGEMA,VELIZY VILLACOUBL,FRANCE. AEA,REACTOR SERV,WARRINGTON WA3 6AT,CHESHIRE,ENGLAND. AEA,REACTOR SERV,DOUNREAY KW14 7TZ,CAITHNESS,SCOTLAND. BELGONUCL SA,B-1200 BRUSSELS,BELGIUM. RP KITTEL, JH (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 20 TC 48 Z9 49 U1 3 U2 7 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 SEP PY 1993 VL 204 BP 1 EP 13 DI 10.1016/0022-3115(93)90193-3 PG 13 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000002 ER PT J AU LEGGETT, RD WALTERS, LC AF LEGGETT, RD WALTERS, LC TI STATUS OF LMR FUEL DEVELOPMENT IN THE UNITED-STATES-OF-AMERICA SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC ID PLUTONIUM; BEHAVIOR; SYSTEM AB Three fuel systems oxide, metal, and carbide are shown to be reliable to high burnup and a fourth system, nitride, is shown to have promise for LMR applications. The excellent steady state performance of the oxide and metal driver fuels for FFTF and EBR-II, respectively, supported by the experience base of tens of thousands of test pins is provided. Achieving 300 MWd/kg in the oxide fuel system through the use of low swelling cladding and duct materials and the Integral Fast Reactor (IFR) concept that utilizes metallic fuel are described. Arguments for economic viability are presented. Responses to operational transients and severe over-power events are shown to have large safety margins and run-beyond-cladding-breach (RBCB), is shown to be non-threatening to LMR reactor systems. Results from a joint U.S.-Swiss carbide test that operated successfully at high power and burnup in FFTF are also presented. C1 ARGONNE NATL LAB,IDAHO FALLS,ID 83403. RP LEGGETT, RD (reprint author), WESTINGHOUSE HANFORD CO,POB 1970,RICHLAND,WA 99352, USA. NR 39 TC 28 Z9 28 U1 0 U2 0 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 SEP PY 1993 VL 204 BP 23 EP 32 DI 10.1016/0022-3115(93)90195-5 PG 10 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000004 ER PT J AU STRATTON, RW LEDERGERBER, G INGOLD, F LATIMER, TW CHIDESTER, KM AF STRATTON, RW LEDERGERBER, G INGOLD, F LATIMER, TW CHIDESTER, KM TI FUEL FABRICATION PROCESSES, DESIGN AND EXPERIMENTAL CONDITIONS FOR THE JOINT UNITED-STATES-SWISS MIXED CARBIDE TEST IN FFTF (AC-3 TEST) SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB The preparation of mixed carbide fuel for a joint (US-Swiss) irradiation test in the US Fast Flux Test Facility (FFTF) is described, together with the experiment design and the irradiation conditions. Two fabrication routes were compared. The US produced 66 fuel pins containing pellet fuel via the powder-pellet (dry) route, and the Swiss group produced 25 sphere pac pins of mixed carbide using the internal gelation (wet) route. Both sets of fuel met all the requirements of the specifications concerning stoichiometry, chemical composition and structure. The pin designs were as similar as possible. The test operated successfully in the FFTF for 620 effective full power days until October 1988 and reached over 8% burn up with peak powers of around 80 kW/m. The conclusions were that the choice of sphere pac or pellet fuel for reactor application is dependent on preferred differences in fabrication (e.g. economics and environmental factors) and not on differences in irradiation behaviour. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. RP STRATTON, RW (reprint author), PAUL SCHERRER INST,WURENLINGEN VILLIGEN,SWITZERLAND. NR 6 TC 10 Z9 10 U1 1 U2 5 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 SEP PY 1993 VL 204 BP 39 EP 49 DI 10.1016/0022-3115(93)90197-7 PG 11 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000006 ER PT J AU TRYBUS, CL SANECKI, JE HENSLEE, SP AF TRYBUS, CL SANECKI, JE HENSLEE, SP TI CASTING OF METALLIC FUEL CONTAINING MINOR ACTINIDE ADDITIONS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB Metallic U-20%Pu-10%Zr (by weight) nuclear fuel was injection cast with the addition of two minor actinides, 2.1% Am and 1.3% Np. Three full length fuel slugs (4.3 mm x 340 mm) were successfully cast incorporating both Np and Am. No unusual macrosegregation of the major constituents was observed. About 60% of the initial Am and 100% of the Np charge was present in the as-cast fuel. Am loss was attributed to volatile contaminants in the feed stock and evaporation at the casting temperature (1465-degrees-C). Microstructural and microchemical characterization of the as-cast fuel along with bulk chemical analyses are reported. RP TRYBUS, CL (reprint author), ARGONNE NATL LAB,IDAHO FALLS,ID 83401, USA. NR 7 TC 22 Z9 22 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 SEP PY 1993 VL 204 BP 50 EP 55 DI 10.1016/0022-3115(93)90198-8 PG 6 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000007 ER PT J AU LAHM, CE KOENIG, JF PAHL, RG PORTER, DL CRAWFORD, DC AF LAHM, CE KOENIG, JF PAHL, RG PORTER, DL CRAWFORD, DC TI EXPERIENCE WITH ADVANCED DRIVER FUELS IN EBR-II SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB Several metallic fuel element designs have been tested and used as driver fuel in Experimental Breeder Reactor II (EBR-II). The most recent advanced designs have all performed acceptably in EBR-II and can provide reliable performance to high burnups. Fuel elements tested have included use of U-10Zr metallic fuel with either D9, 316 or HT9 stainless steel cladding; the D9 and 316-clad designs have been used as standard driver fuel. Experimental data indicate that fuel performance characteristics are very similar for the various designs tested. Cladding materials can be selected that optimize performance based on reactor design and operational goals. RP LAHM, CE (reprint author), ARGONNE NATL LAB,DIV FUELS & ENGN,POB 2528,IDAHO FALLS,ID 83403, USA. OI Crawford, Douglas/0000-0001-5639-7885 NR 12 TC 13 Z9 13 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 SEP PY 1993 VL 204 BP 119 EP 123 DI 10.1016/0022-3115(93)90207-F PG 5 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000016 ER PT J AU PAHL, RG LAHM, CE HAYES, SL AF PAHL, RG LAHM, CE HAYES, SL TI PERFORMANCE OF HT9 CLAD METALLIC FUEL AT HIGH-TEMPERATURE SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB Irradiation testing and post-irradiation examination of HT9 clad U-10Zr metallic fuel has been carried out in the EBR-II reactor. Peak cladding temperatures in the range of 630 to 660-degrees-C were obtained in order to study high temperature breach behavior of metallic fuel. Of the 15 experimental fuel elements tested to 10 at% burnup, two breached by stress rupture. Breach behavior was found to be totally benign for reactor operations. Significant fuel/cladding chemical interactions involving lanthanide-series fission products and carbide depletion were observed in the hottest cladding region. RP PAHL, RG (reprint author), ARGONNE NATL LAB,POB 2528,IDAHO FALLS,ID 83403, USA. RI Hayes, Steven/D-8373-2017 OI Hayes, Steven/0000-0002-7583-2069 NR 3 TC 21 Z9 21 U1 1 U2 6 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 SEP PY 1993 VL 204 BP 141 EP 147 DI 10.1016/0022-3115(93)90210-P PG 7 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000019 ER PT J AU CRAWFORD, DC LAHM, CE TSAI, H PAHL, RG AF CRAWFORD, DC LAHM, CE TSAI, H PAHL, RG TI PERFORMANCE OF U-PU-ZR FUEL CAST INTO ZIRCONIUM MOLDS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC ID FAST-REACTOR AB To investigate a means of eliminating quartz mold waste, U-3Zr and U-20.5Pu-3Zr fuel was injection cast into Zr tubes, or sheaths, and clad in 316SS. These elements and U-10Zr and U-19Pu-10Zr fuel elements, cast in the standard manner into disposable quartz molds, were irradiated in EBR-II to 2 at% burnup and removed for interim examination. Measurments of fuel column axial growth indicate that the Zr-sheathed fuel exhibited significantly less axial elongation than the standard-cast fuel (1.3 to 1.8% versus 4.9 to 8.1%). Fuel material extruded through the ends of the Zr sheaths, contacting the cladding in some cases. Transverse metallographic sections reveal cracks in the Zr sheath, indicating that the sheath is not a sufficient barrier between fuel and cladding to reduce fuel-cladding chemical interaction (FCCI). FCCI effects will be monitored as the elements attain higher burnup. C1 ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,CHICAGO,IL 60439. RP CRAWFORD, DC (reprint author), ARGONNE NATL LAB,DIV FUELS & ENGN,IDAHO FALLS,ID 83403, USA. OI Crawford, Douglas/0000-0001-5639-7885 NR 11 TC 12 Z9 12 U1 0 U2 0 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 SEP PY 1993 VL 204 BP 157 EP 164 DI 10.1016/0022-3115(93)90212-H PG 8 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000021 ER PT J AU LIU, YY TSAI, H BILLONE, MC HOLLAND, JW KRAMER, JM AF LIU, YY TSAI, H BILLONE, MC HOLLAND, JW KRAMER, JM TI BEHAVIOR OF EBR-II MK-V-TYPE FUEL-ELEMENTS IN SIMULATED LOSS-OF-FLOW TESTS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB Three furnace heating tests were conducted with irradiated, HT9-clad and U-19wt%Pu-10wt%Zr-alloy, EBR-II Mk-V-type fuel elements to evaluate the behavior that could be expected during a loss-of-flow event in the reactor. In general, very significant safety margins for cladding breaching have been demonstrated in these tests, under conditions that would envelop a bounding unlikely loss-of-flow event in EBR-II. Highlights of the test results are presented, as are discussions of the cladding breaching mechanisms, axial fuel motion, and fuel surface liquefaction that were found in these tests. C1 ARGONNE NATL LAB,DIV READER ENGN,ARGONNE,IL 60439. RP LIU, YY (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439, USA. NR 13 TC 13 Z9 13 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 SEP PY 1993 VL 204 BP 194 EP 202 DI 10.1016/0022-3115(93)90217-M PG 9 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000026 ER PT J AU KRAMER, JM LIU, YY BILLONE, MC TSAI, HC AF KRAMER, JM LIU, YY BILLONE, MC TSAI, HC TI MODELING THE BEHAVIOR OF METALLIC FAST-REACTOR FUELS DURING EXTENDED TRANSIENTS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB Passive safety features in metal-fueled reactors utilizing the Integral Fast Reactor (IFR) fuel system make it possible to avoid core damage for extended time periods even when automatic scram systems fail to operate or heat removal systems are severely degraded. The time scale for these transients are intermediate between those that have traditionally been analyzed in fast reactor safety assessments and those of normal operation. Consequently, it has been necessary to validate models and computer codes (FPIN2 and LIFE-METAL) for application to this intermediate time regime. Results from out-of-reactor Whole Pin Furnace tests are being used for this purpose. Pretest predictions for tests FM-1 through FM-6 have been performed and calculations have been compared with the experimental measurements. C1 ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439. RP KRAMER, JM (reprint author), ARGONNE NATL LAB,DIV REACTOR ENGN,ARGONNE,IL 60439, USA. NR 15 TC 15 Z9 15 U1 1 U2 3 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 SEP PY 1993 VL 204 BP 203 EP 211 DI 10.1016/0022-3115(93)90218-N PG 9 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000027 ER PT J AU TSAI, H NEIMARK, LA ASAGA, T SHIKAKURA, S AF TSAI, H NEIMARK, LA ASAGA, T SHIKAKURA, S TI BEHAVIOR OF MIXED-OXIDE FUEL-ELEMENTS DURING AN OVERPOWER TRANSIENT SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB A slow-ramp (0.1%/s), extended overpower (almost-equal-to 90%) transient test was conducted in EBR-II on 19 mixed-oxide fuel elements with conservative, moderate, and aggressive designs. Claddings for the elements were Type 316, D9, or PNC-316 stainless steel. Before the transient, the elements were preirradiated under steady-state or steady-state plus duty-cycle (periodic 15% overpower transient) conditions to burnups of 2.5-9.7 at%. Cladding integrity during the transient test was maintained by all fuel elements except one, which had experienced substantial overtemperature in the earlier steady-state irradiation. Extensive centerline fuel melting occurred in all test elements. Significantly, this melting did not cause any elements to breach, although it did have a strong effect on the other aspects of fuel element behavior. C1 POWER REACTOR & NUCL FUEL DEV CORP,IBARAKI,JAPAN. RP TSAI, H (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439, USA. NR 6 TC 7 Z9 7 U1 1 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 SEP PY 1993 VL 204 BP 217 EP 227 DI 10.1016/0022-3115(93)90220-S PG 11 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000029 ER PT J AU COHEN, AB TSAI, H NEIMARK, LA AF COHEN, AB TSAI, H NEIMARK, LA TI FUEL CLADDING COMPATIBILITY IN U-19PU-10ZR/HT9-CLAD FUEL AT ELEVATED-TEMPERATURES SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB Twenty-five elevated-temperature tests were conducted on irradiated U-19wt%Pu-10wt%Zr fuel clad with HT9 at the Alpha-Gamma Hot Cell Facility at Argonne National Laboratory, Illinois. Samples with burnups as high as 11 at% were tested, and the cladding penetration rates all fall within the data band previously defined. Highlights of the test results are presented, as are discussions of the cladding penetration mechanism found in elevated-temperature testing of irradiated metallic fuels. RP COHEN, AB (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439, USA. NR 4 TC 36 Z9 37 U1 0 U2 0 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 SEP PY 1993 VL 204 BP 244 EP 251 DI 10.1016/0022-3115(93)90223-L PG 8 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000032 ER PT J AU STRAIN, RV BOTTCHER, JH UKAI, S ARII, Y AF STRAIN, RV BOTTCHER, JH UKAI, S ARII, Y TI FUEL-SODIUM REACTION-PRODUCT AND ITS INFLUENCE ON BREACHED MIXED-OXIDE FUEL-PINS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON FUELS FOR LIQUID METAL REACTORS, AT THE 1992 INTERNATIONAL MEETING OF THE AMERICAN-NUCLEAR-SOC AND EUROPEAN-NUCLEAR-SOC CY NOV 15-20, 1992 CL CHICAGO, IL SP AMER NUCL SOC, EUROPEAN NUCL SOC AB The formation and consequences of fuel-sodium reaction product (FSRP) in mixed-oxide fuel pins that were irradiated in EBR-II are described. These results indicated that the amount of FSRP that forms as a result of sodium entering a pin with failed cladding is limited by oxygen availability and sodium availability at a favorable fuel temperature. The formation of FSRP is limited to an outer band of the fuel during normal operating conditions. FSRP results in an effective increase in the smeared density of the fuel since the density of FSRP is about half that of the fuel. The FSRP also lowers the O/M of the fuel which reduces its thermal conductivity and increases its thermal expansion. Results from the irradiation tests indicate that the FSRP formation in-reactor is consistent with the characteristics found for sodium uranate and sodium uranoplutonate in the laboratory. C1 POWER REACTOR & NUCL DEV CORP,OARAI ENGN CTR,DIV FUELS & MAT,OARAI,IBARAKI 31113,JAPAN. RP STRAIN, RV (reprint author), ARGONNE NATL LAB,DIV FUELS & ENGN,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 13 TC 15 Z9 16 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 SEP PY 1993 VL 204 BP 252 EP 260 DI 10.1016/0022-3115(93)90224-M PG 9 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA MA980 UT WOS:A1993MA98000033 ER PT J AU CAUSEY, RA WAMPLER, WR RETELLE, JR KAAE, JL AF CAUSEY, RA WAMPLER, WR RETELLE, JR KAAE, JL TI TRITIUM MIGRATION IN VAPOR-DEPOSITED BETA-SILICON CARBIDE SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID HYDROGEN DIFFUSION; DEUTERIUM AB Tritium diffusivities and solubilities have been measured for vapor-deposited beta-silicon carbide. The solubility measurements were performed over the temperature range of 1000 to 1600-degrees-C and the pressure range 0.01 to 1.0 atm. Diffusivities were determined for the temperature range of 1100 to 1500-degrees-C. The magnitude of the diffusivity was much lower than that for metals and the activation energy was much higher. The measured solubility had a negative heat of solution and, when corrected for surface absorption, varied linearly with the square-root of pressure. The low diffusivity along with the apparent negative heat of solution are indicative of trap-controlled migration of tritium in the silicon carbide. C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185. US DOE,ALBUQUERQUE,NM 87185. GEN ATOM,SAN DIEGO,CA 92121. RP CAUSEY, RA (reprint author), SANDIA NATL LABS,LIVERMORE,CA 94550, USA. NR 20 TC 33 Z9 35 U1 3 U2 5 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 SEP PY 1993 VL 203 IS 3 BP 196 EP 205 DI 10.1016/0022-3115(93)90376-A PG 10 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA LV652 UT WOS:A1993LV65200002 ER PT J AU LEWIS, MB LEE, EH AF LEWIS, MB LEE, EH TI G-VALUES FOR GAS-PRODUCTION FROM ION-IRRADIATED POLYSTYRENE SO JOURNAL OF NUCLEAR MATERIALS LA English DT Article ID POLYMERS AB Natural and deuterium-substituted polystyrene targets have been irradiated with energetic ion beams in order to make quantitative measurements of gas emission products. Targets with the deuterium substitution made at the pendant hydrogen group site were compared with targets in which the substitution was made at the hydrogen sites of the pendant phenyl group. The gases were measured with a residual gas analyzer; the primary gas products measured were H-2, CH4, C2H2, C3H4, C6H6, and their various deuterium-substituted forms. It was shown that the G-values for the production of gas molecules by ion-irradiation are strongly dependent on the linear energy transfer (LET) of the ion. Evidence was given that the primary origin of the saturated hydrocarbon gas methane could be traced to scission of the polymer main chain while the primary origin of most of the unsaturated hydrocarbon gases could be traced to the pendant phenyl group in the macromolecule. Based upon zero-point energy theory, the effective reaction temperature for C-H bond scission during 1 MeV Ar+ irradiation is approximately 1600-degrees-C. RP LEWIS, MB (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA. NR 23 TC 16 Z9 16 U1 0 U2 0 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 SEP PY 1993 VL 203 IS 3 BP 224 EP 232 DI 10.1016/0022-3115(93)90379-D PG 9 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA LV652 UT WOS:A1993LV65200005 ER PT J AU CRAWFORD, JF GAHL, JM MCDONALD, JM AF CRAWFORD, JF GAHL, JM MCDONALD, JM TI SIMULATED DISRUPTION TESTING OF CANDIDATE PFC MATERIALS - BERYLLIUM, GRAPHITE, AND OTHER METALS SO JOURNAL OF NUCLEAR MATERIALS LA English DT Letter ID CARBON MATERIALS; PERFORMANCE C1 SANDIA NATL LABS, ALBUQUERQUE, NM 87185 USA. RP UNIV NEW MEXICO, ALBUQUERQUE, NM 87131 USA. NR 12 TC 11 Z9 11 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0022-3115 EI 1873-4820 J9 J NUCL MATER JI J. Nucl. Mater. PD SEP PY 1993 VL 203 IS 3 BP 280 EP 284 DI 10.1016/0022-3115(93)90385-C PG 5 WC Materials Science, Multidisciplinary; Nuclear Science & Technology SC Materials Science; Nuclear Science & Technology GA LV652 UT WOS:A1993LV65200011 ER PT J AU KASE, T KONASHI, K TAKAHASHI, H HIRAO, Y AF KASE, T KONASHI, K TAKAHASHI, H HIRAO, Y TI TRANSMUTATION OF CESIUM-137 USING PROTON ACCELERATOR SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY LA English DT Article DE TRANSMUTATION; RADIOACTIVE WASTES; PROTON ACCELERATOR; CESIUM-137; SPALLATION; PROTONS; NEUTRON CAPTURE; NEUTRONS; NEUTRON REACTIONS; EFFECTIVE HALF LIFE; TRANSMUTATION ENERGY AB Two transmutation methods of Cs-137 using a proton accelerator were evaluated in terms of the effective half life and the transmutation energy. One was the proton method which mainly used high energy proton spallation reaction for transmutation, and the other was the spallation neutron method which mainly used thermal neutron capture reaction. The transmutation energies and the effective half lives for the two transmutation methods were calculated by Monte Carlo simulation codes for particle transport, the NMTC/JAERI code and the MCNP code. The calculated transmutation energies were 510 MeV and 570 MeV for the spallation neutron method and the proton method, respectively, for an effective half life of 2 yr for Cs-137. C1 BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. NATL INST RADIOL SCI, INAGE KU, CHIBA 260, JAPAN. RP POWER REACTOR & NUCL FUEL DEV CORP, TOKAI, IBARAKI 31911, JAPAN. RI konashi, kenji/P-6215-2014 NR 14 TC 4 Z9 4 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0022-3131 EI 1881-1248 J9 J NUCL SCI TECHNOL JI J. Nucl. Sci. Technol. PD SEP PY 1993 VL 30 IS 9 BP 911 EP 918 DI 10.1080/18811248.1993.9734565 PG 8 WC Nuclear Science & Technology SC Nuclear Science & Technology GA ME675 UT WOS:A1993ME67500007 ER PT J AU FERRERO, MA SOMMER, R SPANNE, P JONES, KW CONNER, WC AF FERRERO, MA SOMMER, R SPANNE, P JONES, KW CONNER, WC TI X-RAY MICROTOMOGRAPHY STUDIES OF NASCENT POLYOLEFIN PARTICLES POLYMERIZED OVER MAGNESIUM CHLORIDE-SUPPORTED CATALYSTS SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY LA English DT Article DE POLYOLEFIN CATALYSIS; TOMOGRAPHY; CATALYST POLYMER MORPHOLOGY ID PROPYLENE POLYMERIZATION; ETHYLENE POLYMERIZATION; FRAGMENTATION AB Drastic changes occur during the initial stages of the alpha-olefin polymerization over heterogeneous catalysts. Fragmentation of the support takes place as polymer is formed at the active sites within the voids of the support/catalyst. Magnesium chloride-supported titanium catalyst/polymer particles have been analyzed employing high-resolution computed microtomography (CMT) using synchrotron radiation at Brookhaven National Laboratory. The changes in morphology, the spatial distribution of the support/catalyst fragments, porosity, and polymer distribution in single growing polypropylene and polyethylene particles have been studied. These studies documented considerable macroporosity (> 2 mum in size) within the growing catalyst/support/polymer particles. The largest pores may be due to agglomeration of smaller subparticles. Our results confirm that the initial fragmentation of the support proceeds readily and uniformly to yield a multi-grain growth of subparticle agglomerates. The support/catalyst fragments appear to be distributed relatively uniformly within the growing polymer particle. The surface of the subparticle agglomerates is accessible through the void-space between growing catalyst/particle grains. This may facilitate monomer transport to the activate sites through the polymer/catalyst particles. (C) 1993 John Wiley & Sons, Inc. C1 UNIV MASSACHUSETTS,DEPT CHEM ENGN,AMHERST,MA 01003. BROOKHAVEN NATL LAB,UPTON,NY 11973. NR 21 TC 40 Z9 41 U1 1 U2 5 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-624X J9 J POLYM SCI POL CHEM JI J. Polym. Sci. Pol. Chem. PD SEP PY 1993 VL 31 IS 10 BP 2507 EP 2512 DI 10.1002/pola.1993.080311011 PG 6 WC Polymer Science SC Polymer Science GA LR475 UT WOS:A1993LR47500011 ER PT J AU OKAMOTO, Y YEH, TF LEE, HS SKOTHEIM, TA AF OKAMOTO, Y YEH, TF LEE, HS SKOTHEIM, TA TI DESIGN OF ALKALINE METAL-ION CONDUCTING POLYMER ELECTROLYTES SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY LA English DT Article DE SINGLE ALKALINE METAL ION CONDUCTORS; POLYMER ELECTROLYTES; ANTIOXIDATION PROPERTIES ID LITHIUM PERCHLORATE; COMB POLYMERS; COMPLEXES; TRANSPORT; OXIDE) AB Polysiloxanes with covalently attached oligo ethylene oxide and di-t-butylphenol (1), naphthol (II), and hexafluoropropanol (III) were synthesized. The crosslinked polymers with a hexamethylene spacer were also prepared. The ion conductivities of the Li, Na, and K salts were measured as a function of temperature. The highest conductivities for K and Na of I at 30-degrees-C were 5.5 X 10(-5) and 5.0 X 10(-5) S/cm, respectively, when the ratio of the ion to ethylene oxide unit was 0.014. On the other hand, Li conductivity was 8.0 x 10(-6) S/cm when the ratio between Li and ethylene oxide unit was 0.019. The maximum conductivities of Li ions of II and III were in the order of 10(-6) and 10(-7) S/cm at 30-degrees-C, respectively. When the polymers were crosslinked by a hexamethylene residue, the ion conductivities decreased while the degree of crosslinking increased. The temperature dependence of the cation conductivities of these systems could be described by the Williams-Landel-Ferry (WLF) and the Vogel-Tammann-Fulcher (VTF) equation. The results demonstrate that ion movement in these polymers is correlated with the polymer segmental motion. The order of ionic conductivity was K+ > Na+ much greater than Li+. This suggests that steric hindrance and pi-electron delocalization of the anions attached to polymer backbone have a large effect on ion-pair separation and their ionic conductivities. Thermogravimetric analysis of the polymers indicated that the degradation temperature for I and II were about 100-degrees-C higher than for poly(siloxane-g-ethylene oxide). This is due to the antioxidant properties of sterically hindered phenols and naphthols. (C) 1993 John Wiley & Sons, Inc. C1 POLYTECH INST NEW YORK,POLYMER RES INST,BROOKLYN,NY 11201. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP OKAMOTO, Y (reprint author), POLYTECH INST NEW YORK,DEPT CHEM,6 METROTECH CTR,BROOKLYN,NY 11201, USA. NR 17 TC 46 Z9 46 U1 0 U2 10 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-624X J9 J POLYM SCI POL CHEM JI J. Polym. Sci. Pol. Chem. PD SEP PY 1993 VL 31 IS 10 BP 2573 EP 2581 DI 10.1002/pola.1993.080311018 PG 9 WC Polymer Science SC Polymer Science GA LR475 UT WOS:A1993LR47500018 ER PT J AU MAYA, L AF MAYA, L TI PARACYANOGEN REEXAMINED SO JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY LA English DT Article DE PARACYANOGEN; STRUCTURE; STABILITY; PREPARATION; POLYACYANOGEN; CARBON NITRIDE ID CYANOGEN AB Samples of paracyanogen were prepared by the pyrolysis of silver cyanide, the photolysis of cyanogen, and by sputtering a carbon electrode in a nitrogen plasma. This work was undertaken to establish whether these materials are alike and to derive structural information on the basis of FT-IR, C-13-MAS-NMR, and through temperature-programmed thermal decomposition. Paracyanogen derived from the above sources is indeed alike spectrally and thermally. Paracyanogen is a polymer that incorporates carbon, mostly sp2, and nitrogen in a disordered structure. Cyanogen is the main volatile component released in the thermal decomposition of paracyanogen. The cyanogen released was identified by FT-IR and MS. The rate of release reaches a maximum at ca. 700-degrees-C. Paracyanogen is not an appropriate carbon nitride precursor because of its limited thermal stability. (C) 1993 John Wiley & Sons, Inc. RP MAYA, L (reprint author), OAK RIDGE NATL LAB,DIV CHEM,POB 2008,OAK RIDGE,TN 37831, USA. NR 14 TC 30 Z9 30 U1 0 U2 3 PU JOHN WILEY & SONS INC PI NEW YORK PA 605 THIRD AVE, NEW YORK, NY 10158-0012 SN 0887-624X J9 J POLYM SCI POL CHEM JI J. Polym. Sci. Pol. Chem. PD SEP PY 1993 VL 31 IS 10 BP 2595 EP 2600 DI 10.1002/pola.1993.080311020 PG 6 WC Polymer Science SC Polymer Science GA LR475 UT WOS:A1993LR47500020 ER PT J AU HOOPER, EB AF HOOPER, EB TI PLASMA DETACHMENT FROM A MAGNETIC NOZZLE SO JOURNAL OF PROPULSION AND POWER LA English DT Article AB Magnetic nozzles are used to convert plasma pressure into directed flow, thereby providing thrust for propulsion. The detachment of the now from the magnetic field must be highly directed or the thrust efficiency will be low. A simple model of flowing, cold plasma in an axisymmetric nozzle is considered to determine the fundamental physics and scaling of separation in the limiting case that it is determined by plasma inertia. Ion and electron motions are coupled by the ambipolar electric field. In the limit of negligible meridional electric current, separation from the field is determined by the hybrid (electron-ion) Larmor radius evaluated at the initial magnetic flux and flow velocity. It is shown that the detachment is thereby significantly constrained, but that significant improvement can be obtained if electric currents can flow across the magnetic field either in walls or as plasma currents, or if dissipative effects are sufficiently strong. RP HOOPER, EB (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA. NR 9 TC 45 Z9 45 U1 1 U2 6 PU AMER INST AERONAUT ASTRONAUT PI RESTON PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091 SN 0748-4658 J9 J PROPUL POWER JI J. Propul. Power PD SEP-OCT PY 1993 VL 9 IS 5 BP 757 EP 763 DI 10.2514/3.23686 PG 7 WC Engineering, Aerospace SC Engineering GA LX519 UT WOS:A1993LX51900013 ER PT J AU GOHEEN, SC LIS, LJ KUCUK, O WESTERMAN, MP KAUFFMAN, JW AF GOHEEN, SC LIS, LJ KUCUK, O WESTERMAN, MP KAUFFMAN, JW TI STUDY OF INTACT AND MODIFIED ERYTHROCYTE-MEMBRANES WITH LASER RAMAN-SPECTROSCOPY SO JOURNAL OF RAMAN SPECTROSCOPY LA English DT Article ID STATE TRANSITIONS; GHOSTS; SPECTRA AB Raman spectra of erythrocyte membranes which were intact and erythrocyte membranes which were modified by extrinsic protein extraction procedures were examined. In all cases, there was no apparent correlation between protein extraction and membrane lipid fluidity. The extraction of the band 6 protein by 0.15 M NaCl but not 0.001 m NADH raised the erythrocyte membrane alpha-helical content while the extraction of all extrinsic proteins by 0.1 m NaOH resulted in a decrease in protein alpha-helical content. The study shows that either peripheral protein extraction and/or salt solutions can modify the secondary structures of the remaining intrinsic membrane proteins. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. CHICAGO MED SCH, DIV ONCOL HEMATOL, N CHICAGO, IL 60064 USA. VET AFFAIRS MED CTR, N CHICAGO, IL 60064 USA. NORTHWESTERN UNIV, INST TECHNOL, DEPT BIOMED ENGN, EVANSTON, IL 60208 USA. NR 17 TC 4 Z9 4 U1 4 U2 4 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0377-0486 J9 J RAMAN SPECTROSC JI J. Raman Spectrosc. PD SEP PY 1993 VL 24 IS 9 BP 599 EP 602 DI 10.1002/jrs.1250240908 PG 4 WC Spectroscopy SC Spectroscopy GA MA870 UT WOS:A1993MA87000007 ER PT J AU GRATZ, AJ CHRISTIE, JM AF GRATZ, AJ CHRISTIE, JM TI RECRYSTALLIZATION AT GRAIN CONTACTS IN A SANDY SILTSTONE SO JOURNAL OF STRUCTURAL GEOLOGY LA English DT Article AB The microstructures of a sandy siltstone show evidence for recrystallization of quartz localized at Hertzian stress contacts. This recrystallization was driven not by an elastic stress field, but by plastic strain energy induced prior to recrystallization so that new grains were randomly oriented with respect to the principal stress axes. New grains were preferentially oriented with c-axes approximately 55-degrees from those of their host grains. C1 UNIV CALIF LOS ANGELES,DEPT EARTH & SPACE SCI,LOS ANGELES,CA 90024. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. NR 10 TC 1 Z9 1 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0191-8141 J9 J STRUCT GEOL JI J. Struct. Geol. PD SEP-OCT PY 1993 VL 15 IS 9-10 BP 1139 EP 1144 DI 10.1016/0191-8141(93)90160-C PG 6 WC Geosciences, Multidisciplinary SC Geology GA MD095 UT WOS:A1993MD09500006 ER PT J AU PROCASSINI, RJ WHITMAN, SR DANNEVIK, WP AF PROCASSINI, RJ WHITMAN, SR DANNEVIK, WP TI PORTING A GLOBAL OCEAN MODEL ONTO A SHARED-MEMORY MULTIPROCESSOR - OBSERVATIONS AND GUIDELINES SO JOURNAL OF SUPERCOMPUTING LA English DT Article DE PARALLEL COMPUTING; OCEAN CIRCULATION MODEL; SHARED MEMORY; MIMD COMPUTER; BBN-TC2000 COMPUTER; FORK-JOIN MODEL; SPLIT-JOIN MODEL; TC2000 FORTRAN; PARALLEL FORTRAN PREPROCESSOR AB A three-dimensional global ocean circulation model has been modified to run on the BBN TC2000 multiple instruction stream/multiple data stream (MIMD) parallel computer. Two shared-memory parallel programming models have been used to implement the global ocean model on the TC2000: the TCF (TC2000 Fortran) fork-join model and the PFP (Parallel Fortran Preprocessor) split-join model. The method chosen for the parallelization of this global ocean model on a shared-memory MIMD machine is discussed. The performance of each version of the code has been measured by varying the processor count for a fixed-resolution test case. The statically scheduled PFP version of the code achieves a higher parallel computing efficiency than does the dynamically scheduled TCF version of the code. The observed differences in the performance of the TCF and PFP versions of the code are discussed. The parallel computing performance of the shared-memory implementation of the global ocean model is limited by several factors, most notably load imbalance and network contention. The experience gained while porting this large, ''real world'' application onto a shared-memory multiprocessor is also presented to provide insight to the reader who may be contemplating such an undertaking. RP PROCASSINI, RJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 16 TC 1 Z9 1 U1 0 U2 0 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 0920-8542 J9 J SUPERCOMPUT JI J. Supercomput. PD SEP PY 1993 VL 7 IS 3 BP 287 EP 321 DI 10.1007/BF01206241 PG 35 WC Computer Science, Hardware & Architecture; Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA LY604 UT WOS:A1993LY60400001 ER PT J AU LIU, KC DING, JL AF LIU, KC DING, JL TI A MECHANICAL EXTENSOMETER FOR HIGH-TEMPERATURE TENSILE TESTING OF CERAMICS SO JOURNAL OF TESTING AND EVALUATION LA English DT Article DE EXTENSOMETER; STRAIN MEASUREMENT; CREEP STRAIN; TENSILE TESTING; HIGH TEMPERATURE AB Design and development of a simple mechanical strain extensometer for high-temperature tensile testing of ceramic materials are described. The extensometer uses the lever-arm concept to proportionally reproduce the displacements of fiducial gage marks defined on a specimen. Various potential errors in strain measurement associated with the kinematics of this mechanical extensometer are analyzed and estimated. The extensometer exhibits.a resolution of 5 microstrain (muepsilon) and good long-term stability under moderate changes of ambient temperature. Limited results of simple isothermal creep tests on silicon nitride tensile specimens are presented to demonstrate the effectiveness of the device. C1 WASHINGTON STATE UNIV,DEPT MECH & MAT ENGN,PULLMAN,WA 99164. RP LIU, KC (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. NR 3 TC 4 Z9 4 U1 1 U2 1 PU AMER SOC TESTING MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DR, W CONSHOHOCKEN, PA 19428-2959 SN 0090-3973 J9 J TEST EVAL JI J. Test. Eval. PD SEP PY 1993 VL 21 IS 5 BP 406 EP 413 PG 8 WC Materials Science, Characterization & Testing SC Materials Science GA LU711 UT WOS:A1993LU71100011 ER PT J AU MROZ, G AF MROZ, G TI THE WHITEX STUDY AND THE ROLE OF THE SCIENTIFIC COMMUNITY - A CRITIQUE SO JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION LA English DT Letter RP MROZ, G (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544, USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU AIR & WASTE MANAGEMENT ASSOC PI PITTSBURGH PA PO BOX 2861, PITTSBURGH, PA 15230 SN 1047-3289 J9 J AIR WASTE MANAGE JI J. Air Waste Manage. Assoc. PD SEP PY 1993 VL 43 IS 9 BP 1303 EP 1303 PG 1 WC Engineering, Environmental; Environmental Sciences; Meteorology & Atmospheric Sciences SC Engineering; Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences GA LY160 UT WOS:A1993LY16000011 ER PT J AU WERESZCZAK, AA PARVIZIMAJIDI, A MORE, KL FERBER, MK AF WERESZCZAK, AA PARVIZIMAJIDI, A MORE, KL FERBER, MK TI HIGH-RESOLUTION ELECTRON-MICROSCOPY OF SILICON CARBIDE-WHISKER-REINFORCED ALUMINA COMPOSITE INTERFACES IN SPECIMENS SUBJECTED TO ELEVATED-TEMPERATURES SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY LA English DT Note ID CERAMIC MATRIX COMPOSITES; TOUGHENING BEHAVIOR AB Interfaces of silicon carbide-whisker-reinforced alumina (SiC(w)/Al2O3) composites were examined using high-resolution electron microscopy (HREM). HREM specimens were prepared from the bulk of samples that were previously tested for fracture toughness at 25-degrees, 1000-degrees, 1200-degrees, or 1400-degrees-C, in ambient air. The test temperature history served as an independent variable. It was found that the as-received material did not possess a distinct interfacial layer and that the test temperature history (which included a 30-degrees-C/min heating and cooling rate, a 30-min soak prior to specimen loading, and a typical test duration of 5-10 min) did not appreciably change the interface thickness at any of the elevated test temperatures. C1 UNIV DELAWARE,DEPT MECH ENGN,MAT SCI PROGRAM,NEWARK,DE 19716. UNIV DELAWARE,CTR COMPOSITE MAT,NEWARK,DE 19716. RP WERESZCZAK, AA (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,HIGH TEMP MAT LAB,OAK RIDGE,TN 37831, USA. RI More, Karren/A-8097-2016; Wereszczak, Andrew/I-7310-2016 OI More, Karren/0000-0001-5223-9097; Wereszczak, Andrew/0000-0002-8344-092X NR 12 TC 5 Z9 5 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 SEP PY 1993 VL 76 IS 9 BP 2397 EP 2400 DI 10.1111/j.1151-2916.1993.tb07787.x PG 4 WC Materials Science, Ceramics SC Materials Science GA LZ616 UT WOS:A1993LZ61600039 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 A METHOD OF INCREASING THE SENSITIVITY FOR LASER-DESORPTION IN AN ION-TRAP MASS-SPECTROMETER SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID EXTERNAL SOURCE; CLUSTER IONS; PROBE; PHOTODISSOCIATION; IONIZATION; ABLATION; STORAGE AB Laser desorption in an ion trap mass spectrometer shows significant promise for both qualitative and trace analysis. In this work, we explore various combinations of time-varying DC and radiofrequency (RF) fields in order to optimize laser-generated signals. By judicious choice of timing between the laser desorption pulse and the rise in the applied RF trapping potential, we observed over an order of magnitude enhancement in the trapped ion signal. This new method for laser desorption has enabled us to observe mass spectra of many compounds (e.g., pyrene, dichlorobenzene, and ferrocene) that are barely detectable using previous laser desorption methods. Effects of laser timing and the magnitude of the steady-state RF potential are discussed. C1 LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,CLS-1 MS-G740,LOS ALAMOS,NM 87545. NR 31 TC 21 Z9 21 U1 0 U2 1 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD SEP PY 1993 VL 4 IS 9 BP 706 EP 709 DI 10.1016/1044-0305(93)80048-4 PG 4 WC Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Chemistry; Spectroscopy GA LV664 UT WOS:A1993LV66400002 PM 24225995 ER PT J AU HU, K HOUK, RS AF HU, K HOUK, RS TI INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY WITH AN ELECTRICALLY FLOATING SAMPLING INTERFACE SO JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY LA English DT Article ID LANGMUIR PROBE MEASUREMENTS; ICP-MS; SPECTRAL CHARACTERISTICS; ELECTRON-TEMPERATURE; INTERFERENCES AB In conventional inductively coupled plasma mass spectrometry devices, the sampler and skimmer are grounded. In this work, modest DC voltages (+10 to +50 V) are applied to either (or both) sampler and skimmer. Alternatively, the skimmer is biased, and the sampler is merely left floating. The latter arrangement improves sensitivity for Co+ by sixfold, provides nearly the same molar sensitivity for Co+, Rh+, and Ho+, and extends the upper end of the linear dynamic range to approximately 100 ppm. These changes to the interface do not affect the background perceptibly. The relationship between applied potential and the potential actually measured on the sampler and skimmer is also discussed. C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,DEPT CHEM,AMES,IA 50011. NR 40 TC 5 Z9 5 U1 1 U2 1 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 1044-0305 J9 J AM SOC MASS SPECTR JI J. Am. Soc. Mass Spectrom. PD SEP PY 1993 VL 4 IS 9 BP 733 EP 741 DI 10.1016/1044-0305(93)80053-2 PG 9 WC Biochemical Research Methods; Chemistry, Analytical; Chemistry, Physical; Spectroscopy SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy GA LV664 UT WOS:A1993LV66400007 PM 24226000 ER PT J AU VERBRUGGE, MW BAKER, DR NEWMAN, J AF VERBRUGGE, MW BAKER, DR NEWMAN, J TI DEPENDENT-VARIABLE TRANSFORMATION FOR THE TREATMENT OF DIFFUSION, MIGRATION, AND HOMOGENEOUS REACTIONS - APPLICATION TO A CORRODING PIT SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY LA English DT Article ID PITTING CORROSION; STATIONARY-DISK; 0.5M NACL; ELECTRODES; TRANSPORT; NI AB The anodic dissolution of nickel in chloride medium is treated for a stagnant solution and the hemispherical cavity geometry common to the dissolution of passivating, corrosion-resistant metals. A new coordinate system developed recently by the authors again proves to be useful in dealing with the problem numerically, particularly with regard to the singularity at the pit lip. The quasipotential transformation allows us to reduce the coupled, nonlinear partial differential equations governing the concentrations and the potential to a single linear equation, Laplace's equation, with a great reduction in computation time ard an increase in the accuracy attainable. The method thus treats coupled diffusion and migration with an arbitrary number of facile homogeneous reactions and the participation of an arbitrary number of species in the heterogeneous electrode reaction. Numerical calculations for the dissolution of nickel in chloride solutions are compared with published experimental results. C1 GM CORP,RES & DEV,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 & DEV,DEPT PHYS CHEM,WARREN,MI 48090, USA. RI Newman, John/B-8650-2008 OI Newman, John/0000-0002-9267-4525 NR 18 TC 26 Z9 26 U1 0 U2 3 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 SEP PY 1993 VL 140 IS 9 BP 2530 EP 2537 DI 10.1149/1.2220856 PG 8 WC Electrochemistry; Materials Science, Coatings & Films SC Electrochemistry; Materials Science GA LX302 UT WOS:A1993LX30200021 ER PT J AU CORONES, J STEWART, R AF CORONES, J STEWART, R TI TRANSIENT REFLECTIVITY FOR ANISOTROPIC INHOMOGENEOUS-MEDIA SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION LA English DT Article ID DISSIPATIVE WAVE-EQUATION; INVERSE SCATTERING; TIME DOMAIN; VISCOELASTIC MEDIA; TRANSMISSION; OPTICS AB Wave splitting and invariant imbedding techniques are used to investigate the scattering of transient electro-magnetic plane waves normally incident upon a layered half-space of electrically anisotropic material. Such techniques set the problem in a framework that is intuitively appealing and well suited for describing the scattering processes that are taking place. An effective algorithm for the computation of the transient reflected fields is presented. RP CORONES, J (reprint author), IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011, USA. NR 14 TC 5 Z9 5 U1 0 U2 0 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 SN 0740-3232 J9 J OPT SOC AM A JI J. Opt. Soc. Am. A-Opt. Image Sci. Vis. PD SEP PY 1993 VL 10 IS 9 BP 1941 EP 1949 DI 10.1364/JOSAA.10.001941 PG 9 WC Optics SC Optics GA LY191 UT WOS:A1993LY19100011 ER PT J AU LUCHT, RP FARROW, RL RAKESTRAW, DJ AF LUCHT, RP FARROW, RL RAKESTRAW, DJ TI SATURATION EFFECTS IN GAS-PHASE DEGENERATE 4-WAVE-MIXING SPECTROSCOPY - NONPERTURBATIVE CALCULATIONS SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID CONJUGATE EMISSION; LINE-SHAPES; FLAME; OH; SYSTEMS; SPECTRA; REGIME; ATOM AB Saturation effects in gas-phase degenerate four-wave mixing (DFWM) are investigated for conditions of interest for diagnostic applications in flames and plasmas. In particular, the case in which Doppler and collisional broadening are comparable, as is often the case for flame species such as NO and OH, is investigated. DFWM line shapes and signal intensities are calculated nonperturbatively and compared with high-resolution laser measurements. In the nonperturbative calculations the time-dependent density-matrix equations for a two-level system interacting with three laser fields are integrated directly on a grid of spatial locations along the phase-matching axis. The electric-field amplitude for the DFWM signal is determined by multiplying the time-varying, laser-induced polarization at each grid point by the appropriate phase factor and then by summing over all grid points. The calculations are in excellent agreement with measurements of DFWM line shapes and signal intensities for NO in a buffer gas of He over a wide range of He pressure. Under saturation conditions the pressure dependence of the DFWM signal is reduced greatly compared with the unsaturated case. The signal level is still dependent on the ratio of pure dephasing to quenching collisions, even for saturation conditions. From the standpoint of minimal dependence on collisional processes it appears that operation with pump-laser intensities approximately equal to the saturation intensity is optimal. The dependence of the DFWM line shape and signal intensity on the ratio of probe to pump-laser intensity is also investigated. C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551. NR 35 TC 67 Z9 67 U1 0 U2 3 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 SEP PY 1993 VL 10 IS 9 BP 1508 EP 1520 DI 10.1364/JOSAB.10.001508 PG 13 WC Optics SC Optics GA LV986 UT WOS:A1993LV98600002 ER PT J AU ZHANG, JY HUANG, JY SHEN, YR CHEN, C AF ZHANG, JY HUANG, JY SHEN, YR CHEN, C TI OPTICAL PARAMETRIC GENERATION AND AMPLIFICATION IN BARIUM BORATE AND LITHIUM TRIBORATE CRYSTALS SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID TUNABLE PICOSECOND PULSES; XECL EXCIMER LASER; INFRARED RADIATION; HIGH-POWER; BETA-BAB2O4; OSCILLATOR; AGGAS2 AB A picosecond, widely tunable, optical parametric generator-amplifier system can be constructed with barium borate and lithium triborate crystals pumped by third- or second-harmonic output of an active-passive mode-locked Nd:YAG laser. A tunable output of several hundred mirojoules per pulse with a conversion efficiency as high as 30% has been obtained. The tuning range covers from 0.4 to 2.0 or from 0.6 to 2.5 mum and can be extended by sum- and difference-frequency generation to near 0.2 mum in the UV and to near 8 mum in the IR. The output linewidth can be narrowed to near the transform limit with the help of frequency selection a grating C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. NR 41 TC 91 Z9 99 U1 1 U2 18 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 SEP PY 1993 VL 10 IS 9 BP 1758 EP 1764 DI 10.1364/JOSAB.10.001758 PG 7 WC Optics SC Optics GA LV986 UT WOS:A1993LV98600033 ER PT J AU TOKMAKOFF, A MARSHALL, CD FAYER, MD AF TOKMAKOFF, A MARSHALL, CD FAYER, MD TI OPTICAL PARAMETRIC AMPLIFICATION OF 1-KHZ HIGH-ENERGY PICOSECOND MIDINFRARED PULSES AND APPLICATION TO INFRARED TRANSIENT-GRATING EXPERIMENTS ON DIAMOND SO JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS LA English DT Article ID DIFFERENCE-FREQUENCY-GENERATION; HIGH-POWER; THERMAL-CONDUCTIVITY; DYE-LASER; ND-YAG; THIN-FILMS; 76 MHZ; MU-M; SPECTROSCOPY; DIFFUSIVITY AB Optical parametric generation of high-repetition-rate high-energy picosecond mid-IR pulses is demonstrated by use of a Q-switched mode-locked cavity-dumped output-coupled Nd-YAG laser as the pump source for a seeded LiIO3 optical parametric amplifier. By mixing a high-energy cavity-dumped pulse that is frequency doubled to lambda = 532 nm with a dye-laser pulse at lambda = 611 nm, we generated 2-muJ, 50-ps pulses at lambda = 4.1 mum at a repetition rate of 1 kHz. The application of these ER pulses to nonlinear spectroscopy is demonstrated by measurement of the thermal diffusivity of diamond with IR transient-grating experiments. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP TOKMAKOFF, A (reprint author), STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305, USA. NR 44 TC 20 Z9 20 U1 3 U2 3 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 SEP PY 1993 VL 10 IS 9 BP 1785 EP 1791 DI 10.1364/JOSAB.10.001785 PG 7 WC Optics SC Optics GA LV986 UT WOS:A1993LV98600036 ER PT J AU ERES, G SHARP, JW AF ERES, G SHARP, JW TI INVESTIGATION OF THE KINETICS OF DIGERMANE CHEMISORPTION AND REACTION-PRODUCT DESORPTION IN THIN-FILM GROWTH OF GERMANIUM SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID CHEMICAL VAPOR-DEPOSITION; HYDROGEN ADSORPTION; MONOHYDRIDE PHASE; RECOMBINATIVE DESORPTION; REFLECTION SPECTROSCOPY; INFRARED-SPECTROSCOPY; SI(100)-2X1 SURFACE; DISILANE; GE(100); GE(111) AB The kinetics of the elementary reaction steps in surface-limited thin film growth of germanium from digermane was investigated by utilizing surface differential reflectance. Separation of the elementary reaction steps of chemisorption and reaction product desorption was achieved by using a pulsed molecular beam to modulate the digermane delivery to the heated substrate. Both elementary reaction steps were found to be single exponential first-order processes. The chemisorption reaction on Ge(100) was rapid (k1=500+/-50 s-1), and independent of the substrate temperature between 680 and 810 K. On the other hand the desorption step in the same substrate temperature range is strongly temperature dependent with an activation energy of 1.7+/-0.1 eV and a prefactor of 2 X 10(13+/-1) s-1. A simple kinetic model comprised of two opposing first-order elementary steps is found to be consistent with the experimental results. It is concluded that the kinetic data are compatible with the pairing mechanism for molecular hydrogen desorption, but no (thermal) decomposition mechanism of digermane is found to provide a unique interpretation for the first-order adsorption kinetics. RP ERES, G (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. RI Eres, Gyula/C-4656-2017 OI Eres, Gyula/0000-0003-2690-5214 NR 48 TC 40 Z9 40 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD SEP-OCT PY 1993 VL 11 IS 5 BP 2463 EP 2471 DI 10.1116/1.578593 PG 9 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA LY318 UT WOS:A1993LY31800011 ER PT J AU RUCKMAN, MW MURRAY, MF MOWLEM, JK STRONGIN, DR AF RUCKMAN, MW MURRAY, MF MOWLEM, JK STRONGIN, DR TI SYNTHESIS OF CARBORANE AND BORON-RICH FILMS FROM SOLID DIBORANE USING SYNCHROTRON-RADIATION SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID SI(111); DEPOSITION; MOLECULES; BORANES AB Photoemission and boron K-edge spectra from solid diborane on silver or graphite surfaces were measured before and after exposure to synchrotron radiation at 78 K. Exposing condensed diborane on a silver support to synchrotron radiation produced a boron-rich film that was retained on the surface at 300 K. A surface phase whose valence and near-edge spectra resembled o-carborane was created by a photon or photoelectron-induced reaction between graphite and diborane. C1 SUNY,DEPT CHEM,STONY BROOK,NY 11794. RP RUCKMAN, MW (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 19 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 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD SEP-OCT PY 1993 VL 11 IS 5 BP 2477 EP 2482 DI 10.1116/1.578595 PG 6 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA LY318 UT WOS:A1993LY31800013 ER PT J AU DYLLA, HF MANOS, DM LAMARCHE, PH AF DYLLA, HF MANOS, DM LAMARCHE, PH TI CORRELATION OF OUTGASSING OF STAINLESS-STEEL AND ALUMINUM WITH VARIOUS SURFACE TREATMENTS SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID HIGH-VACUUM; CHAMBER; ORDER AB A number of important applications of ultrahigh vacuum technology involve the use of vacuum systems which cannot be baked in situ, e.g., materials processing equipment and various designs of accelerators and fusion devices. A choice of vessel material and surface treatment which minimizes outgassing in unbaked systems has obvious advantages. We report on a systematic comparison of outgassing measurements from type 304 stainless steels and type 6061/63 aluminum alloys after various standard and advanced surface treatments. Correlations were made with high-resolution secondary ion mass spectroscopy and x-ray photoelectron spectroscopy profiles of the passivation oxide layer and profilometry measurements of the surface roughness. The observed outgassing rates Q obeyed a power law Q=Q0t(-n) where n varied from 0.94 to 1.27. Over the standard observation period (50 h), the outgassing was dominated (> 85%) by H2O. The absolute outgassing rates varied by only a factor of 2.8 for the stainless steels and by a factor of 1.4 for the aluminum alloys, even though the surface roughness differed by more than two orders of magnitude. The high-value-added surface treatments (i.e., electropolishing) did not have significantly lower outgassing in comparison to simple detergent washes. C1 COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23185. PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543. RP DYLLA, HF (reprint author), CONTINUOUS ELECTRON BEAM ACCELERATOR FACIL,NEWPORT NEWS,VA 23606, USA. NR 25 TC 59 Z9 59 U1 3 U2 18 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD SEP-OCT PY 1993 VL 11 IS 5 BP 2623 EP 2636 DI 10.1116/1.578617 PG 14 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA LY318 UT WOS:A1993LY31800035 ER PT J AU KIRBY, RE WHERRY, D MADDEN, M AF KIRBY, RE WHERRY, D MADDEN, M TI OXYGEN DETECTION IN THIN SILICON DIOXIDE LAYERS BY LOW-ENERGY X-RAY-FLUORESCENCE SPECTROMETRY SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article AB Light element detection using low-energy (< 2 keV) x-ray fluorescence (XRF) is described. By tuning the energy of the incident x rays to slightly above the absorption edge, the minimum detection limits for low-Z elements can be greatly improved over conventional XRF and signal-to-background is significantly better than that obtainable for electron-excited x-ray spectra using an energy-dispersive detector. In particular, the minimum detectable thickness of SiO2 is experimentally determined to be 0.36 angstrom (almost-equal-to 0.1 monolayer) film thickness for 1.85 kV anode voltage using a Mg anode with an Al window. Good signal linearity with film thickness is established by comparison with measurements obtained on the same samples using ellipsometry and x-ray photoelectron spectroscopy. C1 KEVEX CORP,SAN CARLOS,CA 94070. INTEL CORP,SANTA CLARA,CA 95052. RP KIRBY, RE (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305, USA. NR 5 TC 2 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD SEP-OCT PY 1993 VL 11 IS 5 BP 2687 EP 2693 DI 10.1116/1.578627 PG 7 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA LY318 UT WOS:A1993LY31800045 ER PT J AU SOUERS, PC TSUGAWA, RT FEARON, EM COLLINS, GW MAIENSCHEIN, JL FAILOR, RA MAPOLES, ER FEDDERS, PA AF SOUERS, PC TSUGAWA, RT FEARON, EM COLLINS, GW MAIENSCHEIN, JL FAILOR, RA MAPOLES, ER FEDDERS, PA TI NUCLEAR-POLARIZATION OF SOLID DEUTERIUM-TRITIUM SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Article ID SPIN-LATTICE RELAXATION; TO-PARA CONVERSION; ORTHO-H2 CONCENTRATION; HYDROGEN ISOTOPES; SEPARATION; ADSORPTION; MIXTURES; FUSION; TIMES; FUEL AB We have investigated both theoretically and experimentally the properties of condensed D-T as they apply to nuclear polarization for hydrogen fusion. At 2 K, atom densities and their electron relaxation times were found to be sufficient to pump nuclei in the process of dynamic nuclear polarization. However, the nuclear spin lattice relaxation times of both the triton and deuteron were too short by 2-3 orders of magnitude, as a result of the creation of rotationally excited hydrogen (J=1 T2 and D2) by the tritium radioactivity. Three means of lengthening these times are discussed: (1) synthesizing low J=1 molecular DT (here, J is the molecular rotational quantum number), (2) synthesizing high J=1 D2-T2 in the ordered phase, and (3) placing the sub-2 K solid in fine-celled foam. The most likely method combines the first and third approaches. Even so, the purified solid DT is likely to last only 20-30 min before the tritium radioactivity reduces the relaxation times. The best temperature regime is in the low-temperature solid; the conditions of the solid at 14-18 K and the liquid at 21-23 K are not considered favorable for nuclear polarization. The first synthesis of pure DT using an adsorption column at 23 K is demonstrated. C1 WASHINGTON UNIV,DEPT PHYS,ST LOUIS,MO 63130. RP SOUERS, PC (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 63 TC 4 Z9 4 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD SEP-OCT PY 1993 VL 11 IS 5 BP 2827 EP 2836 DI 10.1116/1.578648 PG 10 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA LY318 UT WOS:A1993LY31800066 ER PT J AU MILLER, MD BILTOFT, PJ BENAPFL, M AF MILLER, MD BILTOFT, PJ BENAPFL, M TI CHARACTERIZATION OF THE VIRTUAL SOURCE IN AN ELECTRON-BEAM EVAPORATION SYSTEM SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Note AB We have determined the size and location of the ''distributed virtual source'' of an electron-beam evaporation source using a mask/shadowing technique. By depositing copper through slit masks onto glass witnesses, then measuring the width of the deposition pattern it was possible to calculate the size and location of the virtual source. We determined the source size to be 3.9+/-1.0 cm side to side, 4.8+/-0.5 cm front to back, 4.4+/-0.5 cm across one diagonal and 4.4+/-0.5 cm across the other diagonal while its location was 9+/-3 cm above the hearth. The size of the virtual source is dramatically larger than the area created by the electron beam rastering across the surface of the muffin. This data may be useful when high-tolerance vapor deposition into porous materials is desired (as in microchannel plates). In this application, the angle between the virtual source and the substrate may be critical for effective coating of the channels. RP MILLER, MD (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 3 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 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD SEP-OCT PY 1993 VL 11 IS 5 BP 2851 EP 2853 DI 10.1116/1.578652 PG 3 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA LY318 UT WOS:A1993LY31800070 ER PT J AU MACGILL, RA YAO, XY CASTRO, RA DICKINSON, MR BROWN, IG AF MACGILL, RA YAO, XY CASTRO, RA DICKINSON, MR BROWN, IG TI POOR MANS SCRATCH TESTER SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS LA English DT Note ID ADHESION; COATINGS AB We describe a simple scratch tester for use in the evaluation of the scratch/adhesion characteristics of material surfaces. Its simple design makes it very inexpensive and easy to assemble and operate. We have used the device for investigating improvements in the hardness of ion implanted copper and in the adhesion of alumina films ion stitched onto a steel substrate. RP MACGILL, RA (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 7 TC 3 Z9 3 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0734-2101 J9 J VAC SCI TECHNOL A JI J. Vac. Sci. Technol. A-Vac. Surf. Films PD SEP-OCT PY 1993 VL 11 IS 5 BP 2856 EP 2857 DI 10.1116/1.578654 PG 2 WC Materials Science, Coatings & Films; Physics, Applied SC Materials Science; Physics GA LY318 UT WOS:A1993LY31800072 ER PT J AU ANNIS, BK PEDRAZA, DF AF ANNIS, BK PEDRAZA, DF TI EFFECT OF FRICTION ON ATOMIC-FORCE MICROSCOPY OF ION-IMPLANTED HIGHLY ORIENTED PYROLYTIC-GRAPHITE SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B LA English DT Article ID SCALE FRICTION AB An atomic force microscope investigation of the surface of highly oriented pyrolytic graphite (HOPG) after implantation with 165 keV C+ ions established the presence of a dendritic ridge structure. Examples were found for which the image contrast of the ridge structure reversed when scanned in the backward direction. This result is demonstrated to be due to variations in the surface friction. The surface of the ridge structure was found to be characterized by a coefficient of friction that was approximately one-half that on the remainder of the surface. Smaller attractive forces between the scanning tip and the surface were also observed on the ridges as well. In favorable cases, it is apparent that consideration of mechanical effects in atomic force microscopy can provide qualitative surface information in addition to the topographical images. A comparison is made with unimplanted HOPG, and some instrumental methods for enhancing or reducing the effect of friction are discussed. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP ANNIS, BK (reprint author), OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831, USA. NR 10 TC 11 Z9 11 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 1071-1023 J9 J VAC SCI TECHNOL B JI J. Vac. Sci. Technol. B PD SEP-OCT PY 1993 VL 11 IS 5 BP 1759 EP 1765 DI 10.1116/1.586475 PG 7 WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology; Physics, Applied SC Engineering; Science & Technology - Other Topics; Physics GA MC572 UT WOS:A1993MC57200001 ER PT J AU BAI, M HARFE, B FREIMUTH, P AF BAI, M HARFE, B FREIMUTH, P TI MUTATIONS THAT ALTER AN ARG-GLY-ASP (RGD) SEQUENCE IN THE ADENOVIRUS TYPE-2 PENTON BASE PROTEIN ABOLISH ITS CELL-ROUNDING ACTIVITY AND DELAY VIRUS REPRODUCTION IN FLAT CELLS SO JOURNAL OF VIROLOGY LA English DT Article ID EPIDERMAL GROWTH-FACTOR; HELA-CELLS; KB-CELLS; 5 DNA; FIBRONECTIN; RECEPTOR; GENE; PH; INTEGRINS; RELEASE AB The adenovirus penton base protein has a cell rounding activity and may lyse endosomes during virus entry into the cytoplasm. We found that penton base that was expressed in Escherichia coli also caused cell rounding and that cells adhered to polystyrene wells that were coated with the protein. Mutant analysis showed that both properties required an Arg-Gly-Asp (RGD) sequence at residues 340 to 342 of penton base. In flat adherent cells, virus mutants with amino acid substitutions in the RGD sequence were delayed in virus reproduction and in the onset of viral DNA synthesis. In nonadherent or poorly spread cells, the kinetics of mutant virus reproduction were similar to those of wild-type adenovirus type 2. Expression of the mutant phenotype exclusively in the flat cells that we tested supports a model in which penton base interacts with an RGD-directed cell adhesion molecule during adenovirus uptake or uncoating. C1 BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 46 TC 211 Z9 213 U1 0 U2 1 PU AMER SOC MICROBIOLOGY PI WASHINGTON PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171 SN 0022-538X J9 J VIROL JI J. Virol. PD SEP PY 1993 VL 67 IS 9 BP 5198 EP 5205 PG 8 WC Virology SC Virology GA LR777 UT WOS:A1993LR77700013 PM 8350395 ER PT J AU TURNER, MG ROMME, WH GARDNER, RH ONEILL, RV KRATZ, TK AF TURNER, MG ROMME, WH GARDNER, RH ONEILL, RV KRATZ, TK TI A REVISED CONCEPT OF LANDSCAPE EQUILIBRIUM - DISTURBANCE AND STABILITY ON SCALED LANDSCAPES SO LANDSCAPE ECOLOGY LA English DT Article DE DISTURBANCE; LANDSCAPE EQUILIBRIUM; LANDSCAPE ECOLOGY; SCALE AB Temporal and spatial scales of disturbance and recovery are often confounded in discussions of landscape equilibrium. We developed a broad framework for the description of landscapes that separates the spatial and temporal scales of disturbance and recovery and predicts the resultant dynamics of a landscape. Two key parameters representing time and space are used to describe potential disturbance dynamics. The temporal parameter, T, is the ratio of the disturbance interval (i.e., time between successive disturbance events) to the time required for a disturbed site to recover to a mature stage. The spatial parameter, S, is the ratio of the size of the disturbance to the size of the landscape. The use of ratios in both parameters permits the comparison of landscapes across a range of spatial and temporal scales. A simple simulation model was developed to explore the implications of various combinations of S and T. For any single simulation, disturbances of a fixed size are imposed at random locations on a gridded landscape at specified intervals. Disturbed sites recover deterministically through succession. Where disturbance interval is long relative to recovery time and a small proportion of the landscape is affected, the system is stable and exhibits low variance over time (e.g., northeastern hardwood forests). These are traditional ''equilibrium'' systems. Where disturbance interval is comparable to recovery interval and a large proportion of the landscape is affected, the system is stable but exhibits large variance (e.g., subalpine forests in Yellowstone Park). Where disturbance interval becomes much shorter than recovery time and a large proportion of the landscape is affected, the system may become unstable and shift into a different trajectory (e.g., arid ecosystems with altered fire regimes). This framework permits the prediction of disturbance conditions that lead to qualitatively different landscape dynamics and demonstrates the scale-dependent nature of concepts of landscape equilibrium. RP TURNER, MG (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Turner, Monica/B-2099-2010; Romme, William/C-7317-2016 NR 0 TC 237 Z9 253 U1 7 U2 82 PU S P B ACADEMIC PUBLISHING BV PI LELYSTAD PA PLATINASTRAAT 33, 8211 AR LELYSTAD, NETHERLANDS SN 0921-2973 J9 LANDSCAPE ECOL JI Landsc. Ecol. PD SEP PY 1993 VL 8 IS 3 BP 213 EP 227 DI 10.1007/BF00125352 PG 15 WC Ecology; Geography, Physical; Geosciences, Multidisciplinary SC Environmental Sciences & Ecology; Physical Geography; Geology GA MB340 UT WOS:A1993MB34000007 ER PT J AU PERRY, MD PAYNE, SA DITMIRE, T BEACH, R QUARLES, GJ IGNATUK, W OLSON, R WESTON, J AF PERRY, MD PAYNE, SA DITMIRE, T BEACH, R QUARLES, GJ IGNATUK, W OLSON, R WESTON, J TI BETTER MATERIALS TRIGGER CR-LISAF LASER DEVELOPMENT SO LASER FOCUS WORLD LA English DT Article ID PUMPED CR-LISRALF6 LASER; PULSES; GENERATION C1 LIGHTNING OPT CORP,TARPON SPRINGS,FL 34689. POSITIVE LIGHT INC,LOS GATOS,CA 95030. RP PERRY, MD (reprint author), LAWRENCE LIVERMORE NATL LAB,LASER PROGRAM,POB 808,L-493,LIVERMORE,CA 94550, USA. NR 17 TC 4 Z9 4 U1 1 U2 1 PU PENNWELL PUBL CO PI NASHUA PA 5TH FLOOR TEN TARA BOULEVARD, NASHUA, NH 03062-2801 SN 0740-2511 J9 LASER FOCUS WORLD JI Laser Focus World PD SEP PY 1993 VL 29 IS 9 BP 85 EP & PG 0 WC Optics SC Optics GA MC389 UT WOS:A1993MC38900020 ER PT J AU CUSHING, CE MINSHALL, GW NEWBOLD, JD AF CUSHING, CE MINSHALL, GW NEWBOLD, JD TI TRANSPORT DYNAMICS OF FINE PARTICULATE ORGANIC-MATTER IN 2 IDAHO STREAMS SO LIMNOLOGY AND OCEANOGRAPHY LA English DT Article ID GRADIENT HEADWATER STREAMS; ECOSYSTEM DYNAMICS; WOODLAND STREAM; RHODAMINE-WT; PARTICLES; DETRITUS; SESTON; RIVER; SIMULATION; SUSPENSION AB Natural suspended fine particulate organic matter (FPOM, 53-102-mum diam) was labeled with C-14 and reinjected to estimate transport distances in the water column and retention times within the sediments of two Idaho streams. Transport of labeled FPOM particles declined exponentially with downstream distance, yielding mean transport distances of 800 and 580 m in Smiley Creek in 1989 and 1990 at a mean water velocity of 0.27 m s-1 and mean depth of 0.34 m in both years, and a distance of 630 m in the upper Salmon River at a mean velocity of 0.29 m s-1 and a depth of 0. 14 m. These travel distances are equivalent to vertical deposition velocities of 0.7-1.6 mm s-1, or approximately 7-12% of the temperature-corrected quiescent-water fall velocities of the FPOM particles. The estimated deposition flux of approximately 1.5 g (AFDM) m-2 d-1 would turn oyer the standing stock of 0. 8 g M-2 in surficial sediments twice daily. Sampling of benthic FPOM 24 h after release indicated that approximately 99% of the C-14-labeled FPOM initially deposited in the 1,005-m study reach had been resuspended and exported; subsequent clearing was much slower. An advection-dispersion model satisfactorily simulated the deposition of C-14-labeled particles nd their subsequent resuspension and export from the reach. Model-estimated retention times were 1.5-3 h for 99% of deposited sediments and 17 d for the remaining 1%. Thus, particles in surficial sediments exchange rapidly with the water column and migrate downstream several kilometers per day in alternating deposition and resuspension events. These results support the overall concept that conditions throughout a river system are strongly connected longitudinally and that OM introduced in headwater reaches can be transported large distances for later use or storage elsewhere in the river or for eventual export to estuaries. C1 IDAHO STATE UNIV, DEPT BIOL SCI, POCATELLO, ID 83209 USA. ACAD NAT SCI PHILADELPHIA, STROUD WATER RES CTR, AVONDALE, PA 19311 USA. RP CUSHING, CE (reprint author), PACIFIC NW LAB, DEPT ENVIRONM SCI, RICHLAND, WA 99352 USA. NR 49 TC 96 Z9 96 U1 2 U2 21 PU AMER SOC LIMNOLOGY OCEANOGRAPH PI LAWRENCE PA 810 EAST 10TH ST, LAWRENCE, KS 66044-8897 SN 0024-3590 J9 LIMNOL OCEANOGR JI Limnol. Oceanogr. PD SEP PY 1993 VL 38 IS 6 BP 1101 EP 1115 PG 15 WC Limnology; Oceanography SC Marine & Freshwater Biology; Oceanography GA ME147 UT WOS:A1993ME14700001 ER PT J AU DARSEY, JA SOMAN, AG NOID, DW AF DARSEY, JA SOMAN, AG NOID, DW TI ARTIFICIAL NEURAL SYSTEM MODELING OF MONTE-CARLO SIMULATIONS OF POLYMERS SO MAKROMOLEKULARE CHEMIE-THEORY AND SIMULATIONS LA English DT Article ID HEAT-CAPACITIES; MACROMOLECULES AB In this work, a neural network was used to learn features in potential energy surfaces and relate those features to conformational properties of a series of polymers. Specifically, we modeled Monte Carlo simulations of 20 polymers in which we calculated the characteristic ratio and the temperature coefficient of the characteristic ratio for each polymer. We first created 20 rotational potential energy surfaces using MNDO procedures and then used these energy surfaces to produce 10000 chains, each chain 100 bonds long. From these results we calculated the mean-square end-to-end distance, the characteristic ratio and its corresponding temperature coefficient. A neural network was then used to model the results of these Monte Carlo calculations. We found that artificial neural network simulations were highly accurate in predicting the outcome of the Monte Carlo calculations for polymers for which it was not trained. The overall average error for prediction of the characteristic ratio was 4,82%, and the overall average error for prediction of the temperature coefficient was 0,89%. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. RP DARSEY, JA (reprint author), UNIV ARKANSAS,DEPT CHEM,LITTLE ROCK,AR 72204, USA. NR 14 TC 5 Z9 5 U1 0 U2 0 PU HUTHIG & WEPF VERLAG PI BASEL PA AUF DEM WOLF 4 FX#001-41-61-317-94-11, CH-4052 BASEL, SWITZERLAND SN 1018-5054 J9 MAKROMOL CHEM-THEOR PD SEP PY 1993 VL 2 IS 5 BP 711 EP 719 PG 9 WC Polymer Science SC Polymer Science GA LW862 UT WOS:A1993LW86200008 ER PT J AU MERKLE, KL WOLF, D AF MERKLE, KL WOLF, D TI QUASI-PERIODIC FEATURES IN THE ATOMIC-STRUCTURE OF LONG-PERIOD GRAIN-BOUNDARIES SO MATERIALS LETTERS LA English DT Article ID RESOLUTION ELECTRON-MICROSCOPY; FCC METALS; INTERFACES AB Atomic relaxations in grain boundaries (GBs) can assume quasiperiodic character even in periodic GBs, as we show for a SIGMA=41 GB in gold, which is analyzed by transmission-, high-resolution electron microscopy (HREM) and atomistic computer simulations. We find that misfit localization within a large planar GB unit cell can generate densely spaced regions of structural disorder, akin to misfit dislocations. The observations illustrate that atomic relaxations are typically dominated by short-range interactions and the tendency of the solid to assume a local atomic environment similar to the bulk. RP MERKLE, KL (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 23 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-577X J9 MATER LETT JI Mater. Lett. PD SEP PY 1993 VL 17 IS 5 BP 217 EP 222 DI 10.1016/0167-577X(93)90002-F PG 6 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LZ512 UT WOS:A1993LZ51200002 ER PT J AU MARTIN, LJ GORETTA, KC JOO, J SING, JP OLSON, SR WASYLENKO, S POEPPEL, RB CHEN, N AF MARTIN, LJ GORETTA, KC JOO, J SING, JP OLSON, SR WASYLENKO, S POEPPEL, RB CHEN, N TI MECHANICAL-PROPERTIES OF BISRCACUO/AG SUPERCONDUCTORS SO MATERIALS LETTERS LA English DT Article ID YBA2CU3O7-DELTA SUPERCONDUCTORS; CU-O; SILVER; BI2SR2CACU2OX; COMPOSITE; STRENGTH; TAPES AB Highly textured Bi2Sr2CaCu2Ox (2-2-1-2) and Bi1.8Pb0.4Sr2Ca2Cu3Ox (2-2-2-3) bars of various densities were fabricated by sinter forging. Some bars contained 10-20 vol% particulate Ag additions. It was found that the Ag additions had little influence on either strength or fracture toughness, although slight benefits may have resulted for specimens less than almost-equal-to 90% dense. Good phase purities and high densities led to the good overall mechanical properties. C1 ILLINOIS SUPERCONDUCTOR CORP,EVANSTON,IL 60201. BLISS & LAUGHLIN STEEL CO,HARVEY,IL 60426. RP MARTIN, LJ (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439, USA. NR 24 TC 15 Z9 15 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-577X J9 MATER LETT JI Mater. Lett. PD SEP PY 1993 VL 17 IS 5 BP 232 EP 236 DI 10.1016/0167-577X(93)90005-I PG 5 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LZ512 UT WOS:A1993LZ51200005 ER PT J AU ROOT, JH HOLDEN, TM SCHRODER, J HUBBARD, CR SPOONER, S DODSON, TA DAVID, SA AF ROOT, JH HOLDEN, TM SCHRODER, J HUBBARD, CR SPOONER, S DODSON, TA DAVID, SA TI RESIDUAL-STRESS MAPPING IN MULTIPASS FERRITIC STEEL WELD SO MATERIALS SCIENCE AND TECHNOLOGY LA English DT Article ID CONSTANTS AB The spatial distribution of residual stresses in a multipass weldment in a ferritic steel plate has been determined, nondestructively, via neutron diffraction. Tensile longitudinal stresses, which attain magnitudes of + (500 +/- 35) MN M-2 in the fusion and heat affected zones, are balanced by compressive stresses, of - (170 +/- 20) MN M-2, at the edge of the weldment. Stress components normal to the plate surface and transverse to the weld are relatively minor, but the transverse stresses close to the fusion zone exhibit a tensile maximum of + (200 +/- 35) MN m-2 at the midthickness of the plate and a tendency towards zero at both the top and bottom surfaces. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RP ROOT, JH (reprint author), CHALK RIVER LABS,AECL RES,CHALK RIVER,ON,CANADA. NR 11 TC 12 Z9 12 U1 1 U2 3 PU INST MATERIALS PI LONDON PA 1 CARLTON HOUSE TERRACE, LONDON, ENGLAND SW1Y 5DB SN 0267-0836 J9 MATER SCI TECH SER JI Mater. Sci. Technol. PD SEP PY 1993 VL 9 IS 9 BP 754 EP 759 PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA MT746 UT WOS:A1993MT74600004 ER PT J AU SOMASUNDARAM, S DROST, MK BROWN, DR ANTONIAK, ZI AF SOMASUNDARAM, S DROST, MK BROWN, DR ANTONIAK, ZI TI INTEGRATING THERMAL-ENERGY STORAGE IN POWER-PLANTS SO MECHANICAL ENGINEERING LA English DT Article RP SOMASUNDARAM, S (reprint author), PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 0 TC 5 Z9 5 U1 0 U2 1 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0025-6501 J9 MECH ENG JI Mech. Eng. PD SEP PY 1993 VL 115 IS 9 BP 84 EP 90 PG 7 WC Engineering, Mechanical SC Engineering GA LW872 UT WOS:A1993LW87200013 ER PT J AU HULL, JR AF HULL, JR TI ADVANCED MATERIALS FOR SUPERCONDUCTIVITY SO MECHANICAL ENGINEERING LA English DT Article RP HULL, JR (reprint author), ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,SUPERCOND APPLICAT SECT,ARGONNE,IL 60439, USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU ASME-AMER SOC MECHANICAL ENG PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 SN 0025-6501 J9 MECH ENG JI Mech. Eng. PD SEP PY 1993 VL 115 IS 9 BP 92 EP 97 PG 6 WC Engineering, Mechanical SC Engineering GA LW872 UT WOS:A1993LW87200014 ER PT J AU FEHL, DL AF FEHL, DL TI A SIMPLE ONE-DIMENSIONAL MODEL FOR UNDERSTANDING PLANAR DOSE-VERSUS-DEPTH PROFILES IN MIXED PHOTON ELECTRON FIELDS SO MEDICAL PHYSICS LA English DT Article DE DOSE VERSUS DEPTH; BUILDUP; MIXED FIELDS; DEPTH-DOSE; RADIATION DOSIMETRY; RADIOTHERAPY; ELECTRON CONTAMINATION ID SECONDARY ELECTRONS; BEAMS; HERMES AB A one-dimensional model is described for illustrating the perturbing effects of mixed photon/electron fields on planar dose-versus-depth profiles in low Z materials (Z less-than-or-equal-to 20), and at moderate photon energies (0.3-10 MeV). An electron field may arise from photon interactions in filters upstream of a dose-versus-depth experiment. The effects of upstream mass, scattering of electrons out of a gap between a filter and the experiment, and differences between the incident electron energy distribution and locally produced KERMA are modeled and compared to Discrete Ordinates calculations. At transitional depths in a dose-versus-depth experiment, the distortions can be significant and obscure the profile of the photon component alone. RP FEHL, DL (reprint author), SANDIA NATL LABS,DEPT 1277,ALBUQUERQUE,NM 87185, USA. NR 30 TC 1 Z9 1 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0094-2405 J9 MED PHYS JI Med. Phys. PD SEP-OCT PY 1993 VL 20 IS 5 BP 1361 EP 1370 DI 10.1118/1.597100 PG 10 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA MC661 UT WOS:A1993MC66100007 PM 8289717 ER PT J AU DAFTARI, I PETTI, PL COLLIER, JM CASTRO, JR PITLUCK, S AF DAFTARI, I PETTI, PL COLLIER, JM CASTRO, JR PITLUCK, S TI EVALUATION OF FIXED-MODULATION VERSUS VARIABLE-MODULATION TREATMENT MODES FOR CHARGED-PARTICLE IRRADIATION OF THE GASTROINTESTINAL-TRACT SO MEDICAL PHYSICS LA English DT Article DE CHARGED-PARTICLE THERAPY; COMPARATIVE TREATMENT PLANNING; RANGE MODULATION; BEAM SCANNING ID DOSE-VOLUME HISTOGRAMS; BIOMEDICAL EXPERIMENTS; PROTON RADIOTHERAPY; WOBBLER FACILITY; THERAPY; OPTIMIZATION; SYSTEM AB The clinical usefulness of variable-modulation dose delivery of neon ion and proton beams over fixed-modulation beams is evaluated for several patients with tumors in the gastrointestinal tract by comparing dose distributions, dose volume histograms, and predictions of normal tissue complication probabilities calculated with the two methods. Both techniques provide excellent coverage of the target volume with neon ion and proton beams. The advantage of variable modulation is that less dose is delivered proximal to the target volume. For tumors in the gastrointestinal tract, this implies that less dose is given to the liver, gut, kidneys, and lungs. For the ten patients considered in this study, variable-modulation reduced the total integral dose by an average of 17% for neon ion beams and by 18% for protons as compared to fixed modulation. If the tumor volume is excluded, the reduction in the integral dose to normal tissues ranged from 15% to 32% for neon ions and from 18% to 34% for proton beams. These gains are larger than those anticipated on the basis of an analytic study by Goitein and Chen [Med. Phys. 10, 831-840 (1983)], which predicted integral dose reductions of the order of 10% for protons and 14% for neon ions. They are also larger than those reported in a similar study by Urie and Goitein [Med. Phys. 16, 593-601 (1989)] for proton irradiation of skull-base tumors. This is probably because the tumors in the GI tract considered in this study were more irregularly shaped than Goitein and Chen's analytic model assumes. The results of this study also suggest that due to increased sparing of normal tissues, the number of different portal directions required to achieve a satisfactory treatment plan will be reduced for variable-modulation beam delivery systems. This implies that variable-modulation treatment plans will be easier to execute than current fixed-modulation plans. C1 LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720. FU NCI NIH HHS [NCI CA19138, NCI CA53835] NR 34 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 0094-2405 J9 MED PHYS JI Med. Phys. PD SEP-OCT PY 1993 VL 20 IS 5 BP 1387 EP 1398 DI 10.1118/1.597156 PG 12 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA MC661 UT WOS:A1993MC66100012 PM 8289721 ER PT J AU CIESIELSKI, B REINSTEIN, LE MEEK, AG WIELOPOLSKI, L AF CIESIELSKI, B REINSTEIN, LE MEEK, AG WIELOPOLSKI, L TI ENERGY RESPONSE OF AGAR-ALANINE FREE-RADICAL DOSIMETRY TO THERAPEUTIC ELECTRON-BEAMS SO MEDICAL PHYSICS LA English DT Article DE AGAR; ALANINE; ELECTRON PARAMAGNETIC RESONANCE; DOSIMETRY; PHANTOM ID RADIATIONS; RESONANCE; CAF2; LIF AB Calculations of the energy response of an agar-alanine phantom dosimeter (AAPD) to electrons in the energy range of 0.15-20 MeV together with experimental results at 16 MeV are presented. It is shown that the sensitivity of the EPR dosimeter (EPR signal/Gray) is independent of alanine crystal size and varies less than 2%, in the electron energy range indicated. Thus, the measured free radical density distribution may be used directly as an indication of the absorbed dose distribution in an irradiated phantom. C1 BROOKHAVEN NATL LAB,SUNY STONY BROOK,RADIAT THERAPY FACIL,BLDG 490,UPTON,NY 11973. MED ACAD GDANSK,DEPT PHYS & BIOPHYS,PL-80211 GDANSK,POLAND. OI Ciesielski, Bartlomiej/0000-0001-8091-6040 FU FIC NIH HHS [I F05 TWO4614-01]; PHS HHS [431-E287N] NR 19 TC 10 Z9 10 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0094-2405 J9 MED PHYS JI Med. Phys. PD SEP-OCT PY 1993 VL 20 IS 5 BP 1453 EP 1455 DI 10.1118/1.597130 PG 3 WC Radiology, Nuclear Medicine & Medical Imaging SC Radiology, Nuclear Medicine & Medical Imaging GA MC661 UT WOS:A1993MC66100019 PM 8289728 ER PT J AU CAMPOS, H SACKS, FM WALSH, BW SCHIFF, I OHANESIAN, MA KRAUSS, RM AF CAMPOS, H SACKS, FM WALSH, BW SCHIFF, I OHANESIAN, MA KRAUSS, RM TI DIFFERENTIAL-EFFECTS OF ESTROGEN ON LOW-DENSITY-LIPOPROTEIN SUBCLASSES IN HEALTHY POSTMENOPAUSAL WOMEN SO METABOLISM-CLINICAL AND EXPERIMENTAL LA English DT Article ID CORONARY-ARTERY DISEASE; PARTICLE-SIZE; INTERMEDIATE-DENSITY; CARDIOVASCULAR-DISEASE; SERUM-LIPOPROTEINS; RISK-FACTORS; FOLLOW-UP; APOLIPOPROTEINS; FRAMINGHAM; THERAPY C1 LAWRENCE BERKELEY LAB,DEPT MOLEC & NUCL MED,DIV LIFE SCI,BERKELEY,CA 94720. HARVARD UNIV,SCH MED,CHANNING LAB,BOSTON,MA 02115. FU NCRR NIH HHS [MOI-RR02635]; NHLBI NIH HHS [HL-34980, HL-18754] NR 40 TC 69 Z9 70 U1 0 U2 0 PU W B SAUNDERS CO PI PHILADELPHIA PA INDEPENDENCE SQUARE WEST CURTIS CENTER, STE 300, PHILADELPHIA, PA 19106-3399 SN 0026-0495 J9 METABOLISM JI Metab.-Clin. Exp. PD SEP PY 1993 VL 42 IS 9 BP 1153 EP 1158 DI 10.1016/0026-0495(93)90273-Q PG 6 WC Endocrinology & Metabolism SC Endocrinology & Metabolism GA LZ809 UT WOS:A1993LZ80900014 PM 8412768 ER PT J AU CAO, WD KENNEDY, RL CHOUDHURY, A AF CAO, WD KENNEDY, RL CHOUDHURY, A TI AUGER-ELECTRON SPECTROSCOPY STUDY OF GRAIN-BOUNDARY SEGREGATION IN ALLOY-K-500 .1. BEHAVIOR IN AS-PROCESSED STATE SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID COPPER-NICKEL-ALLOYS; CU BINARY-ALLOYS; SURFACE SEGREGATION; DEPTH PROFILE; NI AB Increased interest has been paid to grain boundary segregation in alloy K-500 due to severe intergranular cracking recently observed in forged bars. However, little systematic study of this segregation has been performed so far. A detailed auger electron spectroscopy (AES) study of grain boundary segregation in alloy K-500 has been carried out as a function of alloy chemistry. To determine C segregation, the C and O contamination rates in a vacuum chamber were measured and the necessary condition for C grain boundary segregation determination was established. It has been found that severe C, Al, and Cu segregation to grain boundaries occurred and depended on alloy chemistry. High bulk Ni and low bulk Al promoted C and Al grain boundary segregation, and low bulk Ni and high bulk Al significantly enhanced Cu segregation to grain boundaries. The depth profiles of intergranularly segregated elements also showed different features for high and low Ni content Alloys. In high Ni alloys, C and Al levels dropped continuously as a function of distance from the grain boundaries but the Cu level dropped only slightly. In low Ni alloys, the Al and C levels rose from relatively low grain boundary levels to a peak at a certain distance from the grain boundary where the high grain boundary Cu level dramatically dropped. Transmission electron microscope (TEM) observation revealed a grain boundary gamma'-depleted zone followed by a region with coarser and denser gamma' particles in low Ni and high Al alloys but quite uniformly distributed gamma' particles with no depleted zone in high Ni and low Al alloys. These can be explained by the observed segregation behavior. The occurrence of Cu segregation is explained according to available theories about surface segregation in binary Ni-Cu alloys, and the segregation of C and Al to grain boundaries is suggested to be probably due to their interaction with Ni and Cu. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP CAO, WD (reprint author), TELEDYNE ALLVAC,DEPT RES & DEV,MONROE,NC 28110, USA. NR 21 TC 1 Z9 1 U1 0 U2 3 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD SEP PY 1993 VL 24 IS 9 BP 1897 EP 1907 DI 10.1007/BF02666325 PG 11 WC Materials Science, Multidisciplinary SC Materials Science GA LU882 UT WOS:A1993LU88200001 ER PT J AU CAO, WD KENNEDY, RL CHOUDHURY, A AF CAO, WD KENNEDY, RL CHOUDHURY, A TI AUGER-ELECTRON SPECTROSCOPY STUDY OF GRAIN-BOUNDARY SEGREGATION IN ALLOY-K-500 .2. BEHAVIOR IN SLOW STRAIN-RATE TENSILE TEST SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article AB An auger electron spectroscopy (AES) study was performed to characterize grain boundary segregation behavior and grain boundary precipitation occurring during slow strain rate tensile tests (SSRTTs) of alloy K-500. It was discovered that flake-like precipitates formed on grain boundaries of some test alloys which had a high bulk Cu level. Auger electron (AE) spectra taken from precipitates and AE mapping of grain boundary facets containing precipitates indicated that these precipitates were most likely titanium carbides. The grain boundary segregation that existed in as-processed alloys was also changed in the course of SSRITs. A significant reduction in C segregation and a noticeable increase in Cu segregation were observed in test alloys after SSRTTs. Graphite precipitation was not detected in any of the test alloys before or after SSRTTs. The carbide precipitation and change in segregation pattern are qualitatively understandable on the basis of available thermodynamic data, but further study is necessary to fully explain the observed phenomena. C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. RP CAO, WD (reprint author), TELEDYNE ALLVAC,DEPT RES & DEV,MONROE,NC 28110, USA. NR 14 TC 0 Z9 0 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 SEP PY 1993 VL 24 IS 9 BP 1909 EP 1917 DI 10.1007/BF02666326 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA LU882 UT WOS:A1993LU88200002 ER PT J AU BROOKS, JA THOMPSON, AW AF BROOKS, JA THOMPSON, AW TI MICROSTRUCTURE AND HYDROGEN EFFECTS ON FRACTURE IN THE ALLOY-A-286 SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID DUCTILE FRACTURE; CRACK-GROWTH; TOUGHNESS; ALLOYS AB The commercial iron-base superalloy A-286 was solution-treated and aged at 993 K for times ranging from 0.5 to 450 hours, including the peak-strength age for 16 hours. Microstructural examination showed that the equilibrium eta phase formed first at grain boundaries after about 6 hours of aging and increased in amount with additional aging. Tensile tests on specimens which were uncharged or hydrogen charged from the gas phase revealed in all cases that ductile fracture took place by microvoid coalescence. The path of ductile fracture changed with aging, however, becoming increasingly intergranular with increased aging time after 50 hours. It was found that hydrogen decreased ductility, particularly for aging times greater than 4 hours, although the fracture with hydrogen remained ductile in character. The amount of loss in ductility was approximately constant beyond 4 hours of aging and was independent of fracture path. Fracture was evidently nucleated by carbide inclusion particles by the gamma' strengthening particles (particularly from 4 to 16 hours of aging) and, at aging times of 50 hours or more, by grain boundary eta phase. These observations were consistent with fractographic observations, including dimple size measurements, and with previous work. C1 CARNEGIE MELLON UNIV,DEPT MAT SCI & ENGN,PITTSBURGH,PA 15213. RP BROOKS, JA (reprint author), SANDIA NATL LABS,DIV 8714,LIVERMORE,CA 94550, USA. NR 43 TC 32 Z9 33 U1 0 U2 6 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086 SN 0360-2133 J9 METALL TRANS A PD SEP PY 1993 VL 24 IS 9 BP 1983 EP 1991 DI 10.1007/BF02666333 PG 9 WC Materials Science, Multidisciplinary SC Materials Science GA LU882 UT WOS:A1993LU88200009 ER PT J AU HUGHES, DA HANSEN, N AF HUGHES, DA HANSEN, N TI MICROSTRUCTURAL EVOLUTION IN NICKEL DURING ROLLING FROM INTERMEDIATE TO LARGE STRAINS SO METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE LA English DT Article ID COMMERCIALLY PURE NICKEL; PLASTIC-DEFORMATION; ROLLED ALUMINUM; COMPRESSION; CRYSTALS; ORIENTATIONS; ENERGY; ALLOYS; FLOW AB High-purity nickel (99.99 pct) with a grain size of 80 to 100 Am was deformed by cold-rolling from 37 to 98 pct reductions (von Mises effective strains of epsilon(vm) = 0.5 to 4.5). The deformation microstructures and texture at five strain levels were observed and characterized using transmission electron microscopy (TEM) and neutron diffraction. The microstructures evolved within a framework common to medium and high stacking fault energy fcc polycrystals. This framework consists of structural subdivision by higher angle boundaries (geometrically necessary boundaries) at one volume scale and at a smaller volume scale by lower angle cell boundaries (incidental boundaries) for all strain levels. We have characterized the dislocation boundaries, including dense dislocation walls (DDWs), microbands (MBs), and lamellar boundaries (LBs) in terms of crystallographic and macroscopic orientations, morphology, and frequency of occurrence. The microstructural evolution is discussed with special emphasis on factors that contribute to the transition from structures characteristic of small and medium strain microstructures to those characteristic of large strain microstructures. C1 RISO NATL LAB, DK-4000 ROSKILDE, DENMARK. RP SANDIA NATL LABS, MAT & PROC RES DEPT, LIVERMORE, CA 94550 USA. NR 40 TC 156 Z9 159 U1 3 U2 23 PU MINERALS METALS MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086 USA SN 0360-2133 J9 METALL TRANS A PD SEP PY 1993 VL 24 IS 9 BP 2021 EP 2037 PG 17 WC Materials Science, Multidisciplinary SC Materials Science GA LU882 UT WOS:A1993LU88200013 ER PT J AU LIPSCHUTZ, ME WOLF, SF VOGT, S MICHLOVICH, E LINDSTROM, MM ZOLENSKY, ME MITTLEFEHLDT, DW SATTERWHITE, C SCHULTZ, L LOEKEN, T SCHERER, P DODD, RT SEARS, DWG BENOIT, PH WACKER, JF BURNS, RG FISHER, DS AF LIPSCHUTZ, ME WOLF, SF VOGT, S MICHLOVICH, E LINDSTROM, MM ZOLENSKY, ME MITTLEFEHLDT, DW SATTERWHITE, C SCHULTZ, L LOEKEN, T SCHERER, P DODD, RT SEARS, DWG BENOIT, PH WACKER, JF BURNS, RG FISHER, DS TI CONSORTIUM STUDY OF THE UNUSUAL H-CHONDRITE REGOLITH BRECCIA, NOBLESVILLE SO METEORITICS LA English DT Article ID PRODUCTION-RATES; COSMOGENIC NUCLIDES; TRACE-ELEMENTS; NOBLE-GASES; METEORITES; SOLAR; FAYETTEVILLE; COMPILATION; ABUNDANCES; EVOLUTION AB The Noblesville meteorite is a genomict, regolith breccia (H6 clasts in H4 matrix). Mossbauer analysis confirms that Noblesville is unusually fresh, not surprising in view of its recovery immediately after its fall. It resembles ''normal'' H4-6 chondrites in its chemical composition and induced thermoluminescence (TL) levels. Thus, at lest in its contents of volatile trace elements, Noblesville differs from other H chondrite, class A regolith breccias. Noblesville's small pre-atmospheric mass and fall near Solar maximum and/or its peculiar orbit (with perihelion <0.8 AU as shown by natural TL intensity) may partly explain its levels of cosmogenic radionuclides. Its cosmic ray exposure age of approximately 44 Ma, is long, is equalled or exceeded by <3% of all H chondrites, and also differs from the 33 +/- 3 Ma mean exposure age peak of other H chondrite regolith breccias. One whole-rock aliquot has a high, but not unmatched, Xe-129/Xe-132 of 1.88. While Noblesville is now among the chrondritic regolithic breccias richest in solar gases, elemental ratios indicate some loss, especially of He, perhaps by impacts in the regolith that heated individual grains. While general shock-loading levels in Noblesville did not exceed 4 GPa, individual clasts record shock levels of 5-10 GPa, doubtless acquired prior to lithification of the whole-rock meteoroid. C1 PURDUE UNIV, DEPT PHYS, W LAFAYETTE, IN 47907 USA. NASA, LYNDON B JOHNSON SPACE CTR, HOUSTON, TX 77058 USA. MAX PLANCK INST CHEM, W-6500 MAINZ, GERMANY. SUNY, DEPT EARTH & SPACE SCI, STONY BROOK, NY 11794 USA. LOCKHEED ENGN & SCI CO, HOUSTON, TX 77058 USA. MIT, DEPT EARTH ATMOSPHER & PLANETARY SCI, CAMBRIDGE, MA 02139 USA. UNIV ARKANSAS, DEPT CHEM BIOCHEM, FAYETTEVILLE, AR 72701 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RP LIPSCHUTZ, ME (reprint author), PURDUE UNIV, DEPT CHEM, W LAFAYETTE, IN 47907 USA. NR 61 TC 15 Z9 14 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 SN 0026-1114 J9 METEORITICS JI Meteoritics PD SEP PY 1993 VL 28 IS 4 BP 528 EP 537 PG 10 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LY908 UT WOS:A1993LY90800007 ER PT J AU ARNOULD, M HOWARD, WM AF ARNOULD, M HOWARD, WM TI PARAMETRIC STUDY OF HEAVY ELEMENT ISOTOPIC ABUNDANCES IN SIC GRAINS SO METEORITICS LA English DT Article ID S-PROCESS; MURCHISON METEORITE; NEUTRON SOURCE; FG-SAGITTAE; STAR; NUCLEOSYNTHESIS; ANOMALIES; SOLAR; MASS AB This paper presents a new interpretation of the non-solar isotopic composition of a series of elements from Si to Sm found in small-sized (mum) SiC grains of presumably circumstellar origin. It relies on a parametrized model that aims at investigating in as broad a way as possible the neutron exposures or range of such exposures that could replicate the series of measured isotopic compositions without relying on any specific (and sometimes highly uncertain) astrophysical scenario. It is found that the general trends of the isotopic data of Si, Ca, Ti, Sr, Kr, Xe, Ba, Nd and Sm can be reproduced with a much weaker neutron exposure than contemplated in previous studies. Such a neutron irradiation history does not necessitate the classical assumption of an admixture of a s-process component to normal solar abundances. Instead, the linear correlations observed in three-isotope plots are interpreted in terms of a mixture of components having experienced slightly different neutron exposures. In this framework, predictions are provided for all the elements from Si to Bi, and implications for possible astrophysical sites are discussed. C1 LAWRENCE LIVERMORE NATL LAB, DEPT PHYS, LIVERMORE, CA 94550 USA. RP ARNOULD, M (reprint author), UNIV LIBRE BRUXELLES, INST ASTRON & ASTROPHYS, B-1050 BRUSSELS, BELGIUM. NR 28 TC 3 Z9 3 U1 0 U2 0 PU METEORITICAL SOC PI FAYETTEVILLE PA DEPT CHEMISTRY/BIOCHEMISTRY, UNIV ARKANSAS, FAYETTEVILLE, AR 72701 USA SN 0026-1114 J9 METEORITICS JI Meteoritics PD SEP PY 1993 VL 28 IS 4 BP 561 EP 569 PG 9 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA LY908 UT WOS:A1993LY90800010 ER PT J AU WILDE, P QUINBYHUNT, MS AF WILDE, P QUINBYHUNT, MS TI THE PROVENANCE OF LOW-CALCIC BLACK SHALES - REPLY SO MINERALIUM DEPOSITA LA English DT Note ID DISCRIMINATION C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RP WILDE, P (reprint author), OFF NAVAL RES ASIAN OFF,7-23-17 ROPPONGI,MINATO KU,TOKYO 106,JAPAN. NR 12 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0026-4598 J9 MINER DEPOSITA JI Miner. Depos. PD SEP PY 1993 VL 28 IS 4 BP 285 EP 286 DI 10.1007/BF02421579 PG 2 WC Geochemistry & Geophysics; Mineralogy SC Geochemistry & Geophysics; Mineralogy GA LZ801 UT WOS:A1993LZ80100007 ER PT J AU PYNN, R AF PYNN, R TI THE UNITED-STATES-DEPARTMENT-OF-ENERGY PLANS TO CLOSE LANSCE SO MRS BULLETIN LA English DT Editorial Material RP PYNN, R (reprint author), LOS ALAMOS NATL LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87544, USA. NR 0 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 SEP PY 1993 VL 18 IS 9 BP 7 EP 7 PG 1 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LX554 UT WOS:A1993LX55400001 ER PT J AU PICRAUX, ST AF PICRAUX, ST TI MRS - THE GROWTH-PHASE SO MRS BULLETIN LA English DT Article RP PICRAUX, ST (reprint author), SANDIA NATL LABS,SEMICOND PHYS RES DEPT,ALBUQUERQUE,NM 87185, USA. NR 0 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 SEP PY 1993 VL 18 IS 9 BP 77 EP 79 PG 3 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA LX554 UT WOS:A1993LX55400014 ER PT J AU COSGROVE, GE SELBY, PB UPTON, AC MITCHELL, TJ STEELE, MH RUSSELL, WL AF COSGROVE, GE SELBY, PB UPTON, AC MITCHELL, TJ STEELE, MH RUSSELL, WL TI LIFE-SPAN AND AUTOPSY FINDINGS IN THE 1ST-GENERATION OFFSPRING OF X-IRRADIATED MALE-MICE SO MUTATION RESEARCH LA English DT Article DE LIFE-SPAN; MORTALITY; AUTOPSY FINDINGS; RADIATION; SPERMATOGONIA; (MOUSE) ID ANOMALIES; TUMORS AB Male mice of the C3Hf strain were exposed to 600 R of acute X-rays and, along with unirradiated control males, mated with 101-strain females. The offspring of the treated males were all conceived more than 7 weeks after irradiation, thereby ensuring that they were derived from germ cells exposed as stem-cell spermatogonia. After weaning, the offspring were caged individually and allowed to live their normal lifespan. Tumors and other major pathological disorders were recorded at a careful post-mortem examination. The lesions encountered were typical of those characteristically seen in aging (101 x C3Hf)F1 mice. The results showed no significant differences in lifespan between experimentals and controls. This held true when allowance was made for littermate correlations and for other factors that might contribute to differences among litters. Likewise, there were no significant differences between experimentals and controls in the frequency, severity, or age distribution of neoplasms and other diseases. C1 OAK RIDGE NATL LAB,DIV BIOL,POB 2009,MS 8077,OAK RIDGE,TN 37831. OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,OAK RIDGE,TN 37831. UNIV NEW MEXICO,SCH MED,DEPT PATHOL,ALBUQUERQUE,NM 87131. NR 19 TC 21 Z9 21 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8262 J9 MUTAT RES PD SEP PY 1993 VL 319 IS 1 BP 71 EP 79 DI 10.1016/0165-1218(93)90032-9 PG 9 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA LY417 UT WOS:A1993LY41700008 PM 7690461 ER PT J AU TUCKER, JD AULETTA, A CIMINO, MC DEARFIELD, KL JACOBSONKRAM, D TICE, RR CARRANO, AV AF TUCKER, JD AULETTA, A CIMINO, MC DEARFIELD, KL JACOBSONKRAM, D TICE, RR CARRANO, AV TI SISTER-CHROMATID EXCHANGE - 2ND REPORT OF THE GENE-TOX PROGRAM SO MUTATION RESEARCH LA English DT Review ID CHINESE-HAMSTER OVARY; BONE-MARROW CELLS; CULTURED HUMAN-LYMPHOCYTES; HUMAN PERIPHERAL LYMPHOCYTES; MAMMALIAN CYTOGENETIC ASSAYS; ORGANO-PHOSPHORUS COMPOUNDS; CIGARETTE-SMOKE CONDENSATE; HUMAN-LYMPHOBLASTOID CELLS; OXIDE-EXPOSED PRIMATES; FANCONI ANEMIA CELLS AB This paper reviews the ability of a number of chemicals to induce sister-chromatid exchanges (SCEs). The SCE data for animal cells in vivo and in vitro, and human cells in vitro are presented in 6 tables according to their relative effectiveness. A seventh table summarizes what is known about the effects of specific chemicals on SCEs for humans exposed in vivo. The data support the concept that SCEs provide a useful indication of exposure, although the mechanism and biological significance of SCE formation still remain to be elucidated. C1 INTEGRATED LAB SYST,RES TRIANGLE PK,NC 27709. US EPA,OFF PREVENT PESTICIDES & TOX SUBST,HERD TS-796,401 M ST SW,WASHINGTON,DC 20460. US EPA,OPP HED,WASHINGTON,DC 20460. MICROBIOL ASSOCIATES INC,ROCKVILLE,MD 20850. RP TUCKER, JD (reprint author), LAWRENCE LIVERMORE NATL LAB,LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM L452,LIVERMORE,CA 94551, USA. NR 530 TC 171 Z9 174 U1 0 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-8262 J9 MUTAT RES PD SEP PY 1993 VL 297 IS 2 BP 101 EP 180 DI 10.1016/0165-1110(93)90001-4 PG 80 WC Genetics & Heredity; Toxicology SC Genetics & Heredity; Toxicology GA LP458 UT WOS:A1993LP45800001 PM 7687323 ER PT J AU TOOLEY, PW THERRIEN, CD SIM, JH OSULLIVAN, E DOWLEY, LJ AF TOOLEY, PW THERRIEN, CD SIM, JH OSULLIVAN, E DOWLEY, LJ TI MATING-TYPE, NUCLEAR-DNA CONTENT AND ISOZYME GENOTYPES OF IRISH ISOLATES OF PHYTOPHTHORA-INFESTANS SO MYCOLOGICAL RESEARCH LA English DT Article ID METALAXYL AB P. infestans isolates collected in Ireland in 1988 and 1989 were analyzed for mating type, nuclear DNA content, and isozyme genotypes at the Gpi (glucosephosphate isomerase) and Pep (peptidase) loci. Of 35 isolates collected, 8 were found to be of A2 mating type, 25 were of Al mating type, and 2 were self-fertile. Isozyme genotypes observed included Gpi 90/100 Pep 83/100, Gpi 90/100 Pep 100/100, Gpi 100/100 Pep 83/100, and Gpi 100/100 Pep 100/100. Nuclear DNA content measurements revealed the presence of putative diploid, triploid, and tetraploid individuals in the population. These data indicate that Irish isolates dearly represent the 'new' P. infestans population which has become prevalent in Europe and other countries since the early 1980s. C1 N CAROLINA WESLEYAN COLL,DIV MATH & NAT SCI,ROCKY MOUNT,NC 27804. OAK PK RES CTR,DEPT PLANT PATHOL ENTOMOL,CARLOW,IRELAND. PENN STATE UNIV,DEPT BIOL,UNIV PK,PA 16802. RP TOOLEY, PW (reprint author), USDA ARS,FOREIGN DIS WEED SCI RES UNIT,BLDG 1301,FREDERICK,MD 21702, USA. NR 18 TC 15 Z9 15 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0953-7562 J9 MYCOL RES JI Mycol. Res. PD SEP PY 1993 VL 97 BP 1131 EP 1134 PN 9 PG 4 WC Mycology SC Mycology GA LY918 UT WOS:A1993LY91800012 ER PT J AU JEFFRIES, DL LINK, SO KLOPATEK, JM AF JEFFRIES, DL LINK, SO KLOPATEK, JM TI CO2 FLUXES OF CRYPTOGAMIC CRUSTS .1. RESPONSE TO RESATURATION SO NEW PHYTOLOGIST LA English DT Article DE CRYPTOGAMIC CRUSTS; CO2 EXCHANGE; DEHYDRATION; MICROCOLEUS; SCYTONEMA ID PARMELIA-PRAESIGNIS NYL; PHOTOSYNTHETIC RECOVERY; LICHENS; RESPIRATION; PHYSIOLOGY; EXCHANGE; SOILS; WATER AB The relationship between carbon dioxide exchange of Microcoleus- and Scytonema-dominated cryptogamic crusts and resaturation time was measured in the laboratory with a modified discrete sampling technique and infrared gas analysis. Maximum net photosynthetic rate of Microcoleus was 187 nmol CO2 m-2 s-1 and of Scytonema was 111 nmol CO2 m-2 s-1 for rehydration to 100% soil saturation. Both crust types demonstrated a slow rise in resaturation respiration and took 2 days to become fully active after the first rehydration to 100% soil saturation after long-term dryness, and only one day to become active after the second rehydration cycle. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. ARIZONA STATE UNIV, DEPT BOT, TEMPE, AZ 85287 USA. RP JEFFRIES, DL (reprint author), UNIV OZARKS, DIV SCI & MATH, CLARKSVILLE, AR 72830 USA. NR 34 TC 38 Z9 46 U1 0 U2 7 PU CAMBRIDGE UNIV PRESS PI NEW YORK PA 40 WEST 20TH STREET, NEW YORK, NY 10011-4211 SN 0028-646X J9 NEW PHYTOL JI New Phytol. PD SEP PY 1993 VL 125 IS 1 BP 163 EP 173 DI 10.1111/j.1469-8137.1993.tb03874.x PG 11 WC Plant Sciences SC Plant Sciences GA MB897 UT WOS:A1993MB89700013 ER PT J AU RUSSO, AJ CAMPBELL, RB AF RUSSO, AJ CAMPBELL, RB TI A MODEL FOR DISRUPTION GENERATED RUNAWAY ELECTRONS SO NUCLEAR FUSION LA English DT Article ID PLASMA; TOKAMAKS AB One of the possible consequences of disruptions in tokamaks is the generation of runaway electrons which can impact plasma facing components and cause damage, owing to high local energy deposition. This problem becomes more serious as the machine size and plasma current increase. Since large size and high currents are characteristics of proposed future machines, control of runaway generation is an important design consideration. A lumped circuit model for disruption runaway electron generation indicates that impurity concentration and type, as well as plasma motion, can strongly influence runaway behaviour. A comparison of disruption data from several runs on JET and DIII-D with model results demonstrate the effects of impurities, and plasma motion, on runaway number density and energy. The model is also applied to the calculation of runaway currents for ITER. RP RUSSO, AJ (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 16 TC 24 Z9 24 U1 0 U2 2 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 SEP PY 1993 VL 33 IS 9 BP 1305 EP 1313 DI 10.1088/0029-5515/33/9/I05 PG 9 WC Physics, Fluids & Plasmas SC Physics GA MK444 UT WOS:A1993MK44400005 ER PT J AU COTTRELL, GA BHATNAGAR, VP DACOSTA, O DENDY, RO JACQUINOT, J MCCLEMENTS, KG MCCUNE, DC NAVE, MFF SMEULDERS, P START, DFH AF COTTRELL, GA BHATNAGAR, VP DACOSTA, O DENDY, RO JACQUINOT, J MCCLEMENTS, KG MCCUNE, DC NAVE, MFF SMEULDERS, P START, DFH TI ION-CYCLOTRON EMISSION MEASUREMENTS DURING JET DEUTERIUM-TRITIUM EXPERIMENTS SO NUCLEAR FUSION LA English DT Article ID FUSION PRODUCTS; TOKAMAK PLASMAS AB In the course of the Preliminary Tritium Experiment in JET, where combined deuterium and tritium neutral beam injection generated a DT fusion power of 1.7 MW, ion cyclotron emission (ICE) was measured in the frequency range nu less-than-or-equal-to 180 MHz. The ICE spectra contain superthermal, narrow, equally spaced emission lines, which correspond to successive cyclotron harmonics of deuterons or alpha particles at the outer midplane, close to the last closed flux surface at major radius R approximately 4.0 m. Above about 100 MHz the lines merge into a relatively intense continuum. The ICE signal fluctuates rapidly in time, and is extinguished whenever a large amplitude edge localized mode (ELM) occurs. In pure deuterium and mixed DT discharges ICE spectra are similar in form, but on changing from pure D to mixed D + T neutral beam injection at constant power, the intensity of the ICE rises in proportion to the increased neutron flux: this indicates that fusion alpha particles - and not beam ions - provide the free energy to generate ICE. The JET ICE database, which now extends over a range of six decades in signal intensity, shows that the time averaged ICE power increases almost linearly with total neutron flux. The rise and fall of the neutron flux during a single discharge is closely followed by that of the ICE signal, which is delayed by a time of the order of the fusion product slowing down time. This feature is well modelled by a TRANSP code simulation of the density of deeply trapped fusion products reaching the plasma edge. Calculations reveal a class of fusion products, born in the core, which make orbital excursions of sufficient size to reach the outer midplane edge. There, the velocity distribution has a ring structure, which is found to be linearly unstable to relaxation to obliquely propagating waves on the fast Alfven-ion Bernstein branch at all ion cyclotron harmonics. The paper shows how ICE provides a unique diagnostic for fusion alpha particles. C1 AEA TECHNOL, CULHAM LAB, ABINGDON, OXON, ENGLAND. PRINCETON UNIV, PRINCETON PLASMA PHYS LAB, PRINCETON, NJ 08544 USA. ASSOC IST EURATOM, CTR FUSAO NUCL, INST SUPER TECN, LISBON, PORTUGAL. LAB NACL ENGN & TECHNOL IND, LISBON, PORTUGAL. RP COTTRELL, GA (reprint author), JET JOINT UNDERTAKING, ABINGDON, OXON, ENGLAND. RI Dendy, Richard/A-4533-2009; Nave, Maria/A-5581-2013 OI Nave, Maria/0000-0003-2078-6584 NR 31 TC 84 Z9 85 U1 1 U2 2 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 SEP PY 1993 VL 33 IS 9 BP 1365 EP 1387 DI 10.1088/0029-5515/33/9/I10 PG 23 WC Physics, Fluids & Plasmas SC Physics GA MK444 UT WOS:A1993MK44400010 ER PT J AU BLUM, EB NAWROCKY, RJ AF BLUM, EB NAWROCKY, RJ TI TUNE MEASUREMENT IN THE NSLS BOOSTER SYNCHROTRON SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The NSLS booster is a 7 to 750 MeV synchrotron with a 0.7 Hz repetition rate. The betatron tunes can change during acceleration by as much as 0.1 units, causing beam loss as they cross resonance lines. Precise measurements with a conventional swept spectrum analyzer have always been difficult because of the rapid variation of tune as the magnets are ramped. We are now using a system based on a Tektronix 3052 Digital Signal Processing System that can obtain an effectively continuous measurement of both the horizontal and vertical tunes during a single acceleration cycle. Betatron oscillations are stimulated for the measurements by applying broadband noise to the beam through stripline electrodes. We will describe the instrumentation, our measurements of tune as a function of time during the acceleration cycle, and the resulting improvements to the booster operation. RP BLUM, EB (reprint author), BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973, USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 244 EP 250 DI 10.1016/0168-9002(93)91161-F PG 7 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900002 ER PT J AU TUPA, D MCNAUGHTON, MW SWENSON, DR YORK, RL AF TUPA, D MCNAUGHTON, MW SWENSON, DR YORK, RL TI SYSTEMATIC-ERRORS FROM AN OPTICALLY PUMPED POLARIZED ION-SOURCE SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID ELASTIC-SCATTERING; PROTON; NP AB The systematic errors that arise in polarization measurements have been examined using the LAMPF optically pumped polarized ion source (OPPIS). Knowledge of these is important in planning precise experiments such as charge symmetry breaking or parity violation measurements. RP TUPA, D (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 28 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 251 EP 255 DI 10.1016/0168-9002(93)91162-G PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900003 ER PT J AU CISKOWSKI, D AHN, H DIXSON, R FEI, X HUGHES, VW MATTHIAS, BE PILLAI, C WOODLE, K AF CISKOWSKI, D AHN, H DIXSON, R FEI, X HUGHES, VW MATTHIAS, BE PILLAI, C WOODLE, K TI A CHOPPED HIGH-INTENSITY MUON BEAM AT THE STOPPED MUON CHANNEL AT LAMPF SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB A chopped positive muon beam with high intensity, low momentum, and high purity has been developed at LAMPF using a high voltage chopper system. The rise and fall times of the chopped muon beam are approximately 100 ns, the repetition rate extends up to 100 kHz and the extinction ratio for muons is 0.3%. The beam chopper system is described and the test results are presented. This chopped high intensity mu+ beam is to be used to achieve resonance line-narrowing in a precision microwave spectroscopy experiment on muonium. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP CISKOWSKI, D (reprint author), YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511, USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 260 EP 264 DI 10.1016/0168-9002(93)91164-I PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900005 ER PT J AU HALLING, AM KWAN, S AF HALLING, AM KWAN, S TI A MULTIPLICITY JUMP TRIGGER FOR FIXED TARGET CHARM AND BEAUTY EXPERIMENTS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB Using the E791 spectrometer we have tested a multiplicity jump trigger that makes use of thin quartz plates to count the number of particles before and after a decay region just downstream of a thin tungsten target struck by a 500 GeV pion beam. The detector is sensitive to about 2.7 tracks being created between the plates at the 1 sigma level. This performance level may enhance charm events by a small amount, and should lead to an enrichment of well over 100 for BBBAR events. RP HALLING, AM (reprint author), FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 7 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 324 EP 329 DI 10.1016/0168-9002(93)91174-L PG 6 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900015 ER PT J AU GIOKARIS, ND DEMORTIER, L KHAZINS, DM ANDERSON, DF CIHANGIR, S ZIMMERMAN, J FANOURAKIS, G BUDAGOV, J MORGAN, M AF GIOKARIS, ND DEMORTIER, L KHAZINS, DM ANDERSON, DF CIHANGIR, S ZIMMERMAN, J FANOURAKIS, G BUDAGOV, J MORGAN, M TI A COMPARISON OF ARGON AND XENON GAS-MIXTURES AT HIGH-PRESSURE FOR CALORIMETRY SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID IONIZATION AB Calorimeters using high pressure gas as active medium are now being considered as candidates for the forward region of detectors at high luminosity colliders. A parallel plate electromagnetic calorimeter and a high pressure test vessel have been used to study and compare the response of Ar+CH4, Ar+CF4, Ar+C2H6, Xe+CH4 and Xe+CF4 gas mixtures to 50 GeV electrons and to alpha particles from an Am-241 source. Results on the energy resolution, the electron drift velocity, and the collected charge as a function of electric field and gas pressure for the different gas mixtures are compared. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV ROCHESTER,DEPT PHYS & ASTRON,ROCHESTER,NY 14627. DUBNA JOINT NUCL RES INST,MOSCOW 101000,RUSSIA. ABIL ENGN TECNOL INC,S HOLLAND,IL 60473. INFN,I-56010 PISA,ITALY. RP GIOKARIS, ND (reprint author), ROCKEFELLER UNIV,DEPT EXPTL PHYS,NEW YORK,NY 10021, USA. NR 9 TC 5 Z9 5 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 364 EP 371 DI 10.1016/0168-9002(93)91178-P PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900019 ER PT J AU KHAZINS, DM DEMORTIER, L GIOKARIS, ND ANDERSON, DF CIHANGIR, S ZIMMERMAN, J BUDAGOV, JA IVANOV, GA KALININ, AI KURITCHIN, AA POROSHIN, NO TOKAR, S FANOURAKIS, G LOBKOWICZ, F GUSTAFSON, HR MORGAN, M AF KHAZINS, DM DEMORTIER, L GIOKARIS, ND ANDERSON, DF CIHANGIR, S ZIMMERMAN, J BUDAGOV, JA IVANOV, GA KALININ, AI KURITCHIN, AA POROSHIN, NO TOKAR, S FANOURAKIS, G LOBKOWICZ, F GUSTAFSON, HR MORGAN, M TI A HIGH-PRESSURE GAS-IONIZATION TUBE CALORIMETER FOR FORWARD DETECTORS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID URANIUM AB A calorimeter design based on high-pressure gas-ionization tubes arranged nearly parallel to the incident particle direction is described. Energy, time, and position resolutions of such a calorimeter, as well as its radiation hardness and electronic noise, are discussed. Resulting characteristics meet the needs of the forward calorimetry for SSC and LHC collider experiments, and seem promising for application in other, more central parts of these experiments. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. DUBNA JOINT NUCL RES INST,MOSCOW 101000,RUSSIA. UNIV ROCHESTER,DEPT PHYS & ASTRON,ROCHESTER,NY 14627. UNIV MICHIGAN,ANN ARBOR,MI 48109. ABIL ENGN TECHNOL INC,S HOLLAND,IL 60473. INFN,I-56010 PISA,ITALY. RP KHAZINS, DM (reprint author), ROCKEFELLER UNIV,DEPT EXPTL PHYS,NEW YORK,NY 10021, USA. NR 35 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 372 EP 380 DI 10.1016/0168-9002(93)91179-Q PG 9 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900020 ER PT J AU CHARPAK, G GAUDEAN, I GIOMATARIS, Y PESKOV, V SCIGOCKI, D SAULI, F STUART, D AF CHARPAK, G GAUDEAN, I GIOMATARIS, Y PESKOV, V SCIGOCKI, D SAULI, F STUART, D TI SOME STUDIES OF THE APPLICATIONS OF CSI PHOTOCATHODES IN GASEOUS DETECTORS SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article ID PRESSURE; CHAMBER AB Cesium-iodide photocathodes have been investigated in combination with gaseous detectors. The quantum efficiency of a semi-transparent CsI photocathode has been measured in the UV range and found to be 10% at 140 nm. We report experimental results obtained with such photocathodes coupled to BaF2 and KMgF3 scintillators and read out by parallel-plate gaseous detectors. C1 UNIV LAUSANNE,CH-1000 LAUSANNE 17,SWITZERLAND. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. UNIV CALIF DAVIS,DAVIS,CA 95616. RP CHARPAK, G (reprint author), CERN,DIV PPE,CH-1211 GENEVA 23,SWITZERLAND. NR 23 TC 16 Z9 16 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 391 EP 398 DI 10.1016/0168-9002(93)91181-L PG 8 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900022 ER PT J AU MIHAILIDIS, DN HINTZ, NM SETHI, A JONES, MK RYBARCYK, L KOCH, K MORRIS, CL AF MIHAILIDIS, DN HINTZ, NM SETHI, A JONES, MK RYBARCYK, L KOCH, K MORRIS, CL TI A POSITION-SENSITIVE PROTON TELESCOPE SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The Medium Resolution Proton Spectrometer (MRS) at the Los Alamos Meson Physics Facility (LAMPF) was used to develop a position-sensitive proton telescope with CsI(pure) crystals. Photomultiplier tubes were mounted at both ends of a 7.5 x 15 x 30 cm long proton telescope and position measurements using the difference of the time signals were performed. The position resolution was measured to be 2.5 cm FWHM. An energy resolution DELTAE/E = 3 to 4% was measured. C1 RUTGERS UNIV,DEPT PHYS,PISCATAWAY,NJ 08854. LOS ALAMOS NATL LAB,LOS ALAMOS MESON PHYS FACIL,LOS ALAMOS,NM 87545. RP MIHAILIDIS, DN (reprint author), UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455, USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 469 EP 473 DI 10.1016/0168-9002(93)91194-R PG 5 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900035 ER PT J AU DRAKE, DM CAYTON, TE HIGBIE, PR MCDANIELS, DK REEDY, RC BELIAN, RD WALKER, SA COPE, LK NOVEROSKE, E BACA, CL AF DRAKE, DM CAYTON, TE HIGBIE, PR MCDANIELS, DK REEDY, RC BELIAN, RD WALKER, SA COPE, LK NOVEROSKE, E BACA, CL TI EXPERIMENTAL EVALUATION OF THE BDD-I DOSIMETER FOR THE GLOBAL POSITIONING SYSTEM SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT LA English DT Article AB The Burst Detection Dosimeter I (BDD-I) is a multipurpose silicon detector system that has flown on two Block I satellites of the Global Positioning System (GPS) series. These spacecraft occupy circular orbits about 20000 km above the surface of the Earth. BDD-I measures the radiation dose received by the GPS spacecraft, primarily from energetic electrons trapped in the Earth's radiation belt, but also from solar energetic particles and galactic cosmic rays outside the trapped radiation zone (when the spacecraft is near the Earth's magnetic poles). Absorbers, located in front of four separate silicon sensors, determine energy thresholds for measuring incident particle fluxes, and the magnitude of energy loss in each sensor provides an imperfect but useful separation between protons and electrons over a wide range of energies. This article describes the important mechanical and electronic features of this detector. Relations are given for converting the observed counting rate in the detector to parameters representing the incident flux of charged particles. The overall uncertainty in this determination of the integral electron flux is about 30%. The detector response was well characterized by the use of electrons with energies below 3 MeV. Monte Carlo simulations agree with measured responses to within the experimental uncertainty. The simulation results also enable assessments of the sensitivity of the experimental measurements to systematic effects such as an angular divergence in the incident electron beam. The article presents some sample data measured with the detector. RP DRAKE, DM (reprint author), LOS ALAMOS NATL LAB,DIV SPACE SCI & TECHNOL,LOS ALAMOS,NM 87545, USA. OI Reedy, Robert/0000-0002-2189-1303 NR 13 TC 8 Z9 8 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0168-9002 J9 NUCL INSTRUM METH A JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip. PD SEP 1 PY 1993 VL 333 IS 2-3 BP 571 EP 588 DI 10.1016/0168-9002(93)91210-E PG 18 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Nuclear; Physics, Particles & Fields SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LR949 UT WOS:A1993LR94900051 ER PT J AU BOZOIAN, M AF BOZOIAN, M TI A USEFUL FORMULA FOR DEPARTURES FROM RUTHERFORD BACKSCATTERING SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS LA English DT Letter ID CROSS-SECTIONS; DEVIATIONS AB I review a theory of departures from Rutherford backscattering due to perturbing nuclear forces encountered at ion beam energies where the elastic-scattering cross section begins to deviate from its Rutherford value due to Coulomb scattering. Least-squares fits to data and optical-potential-model calculations for four important ion projectiles, hydrogen, helium, carbon, and oxygen, are presented. I find a simple formula that determines departures from Rutherford backscattering for hydrogen to oxygen ions incident on a wide range of targets. Recent carbon- and oxygen-ion experiments by the Helsinki group (E. Rauhala, private communication) give further support to the theory. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 7 TC 13 Z9 13 U1 3 U2 6 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 SEP PY 1993 VL 82 IS 4 BP 602 EP 603 DI 10.1016/0168-583X(93)96017-7 PG 2 WC Instruments & Instrumentation; Nuclear Science & Technology; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Instruments & Instrumentation; Nuclear Science & Technology; Physics GA LV560 UT WOS:A1993LV56000017 ER PT J AU AMIAN, WB BYRD, RC CLARK, DA GOULDING, CA MEIER, MM MORGAN, GL MOSS, CE AF AMIAN, WB BYRD, RC CLARK, DA GOULDING, CA MEIER, MM MORGAN, GL MOSS, CE TI DIFFERENTIAL NEUTRON-PRODUCTION CROSS-SECTIONS FOR 597 MEV PROTONS SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID STOPPING-LENGTH TARGETS; EFFICIENCY CALIBRATION; 256-MEV PROTONS; DETECTOR; ENERGIES; YIELDS AB Differential(p,xn) cross sections were measured at emission angles of 30, 60, 120, and 150 deg for the 597-MeV proton bombardment of thin targets of elemental beryllium, boron, carbon, nitrogen, oxygen, aluminum, iron, lead, and depleted uranium. Time-of-flight techniques were used to determine the neutron energy spectrum and to identify and discriminate against backgrounds. Comparisons of the experimental data with intranuclear-cascade evaporation model calculations using the HETC code show good agreement for lead and uranium, but there are discrepancies for the light elements, predominantly at forward angles. Comparison with a previous experiment shows good agreement only for heavy nuclei in the evaporation region at neutron energies below 20 MeV C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP AMIAN, WB (reprint author), FORSCHUNGSZENTRUM JULICH GMBH,W-5170 JULICH,GERMANY. NR 19 TC 47 Z9 48 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 SEP PY 1993 VL 115 IS 1 BP 1 EP 12 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LV369 UT WOS:A1993LV36900001 ER PT J AU LOGAN, CM KOMOTO, TT AF LOGAN, CM KOMOTO, TT TI OBSERVED PENETRATION OF 14-MEV NEUTRONS IN VARIOUS MATERIALS SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB Experimentally observed 14-MeV neutron removal cross sections are presented for 16 materials. At a scattering energy loss of 4 MeV, the effective macroscopic cross section per unit mass (in square centimetres per gram) for a nucleus of mass A is given by 0.25A-1.78 + 0.10A-0.47. Such information provides a simple method for estimating neutron transport in systems driven by thermonuclear neutrons. RP LOGAN, CM (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94550, USA. NR 7 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 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD SEP PY 1993 VL 115 IS 1 BP 38 EP 42 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LV369 UT WOS:A1993LV36900004 ER PT J AU SPRIGGS, GD AF SPRIGGS, GD TI A MEASUREMENT OF THE EFFECTIVE DELAYED NEUTRON FRACTION OF THE WESTINGHOUSE IDAHO NUCLEAR COMPANY SLAB TANK ASSEMBLY USING ROSSI-ALPHA TECHNIQUES SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Note AB The effective delayed neutron fraction of a solution reactor fueled with highly enriched uranyl nitrate was measured using two Rossi-alpha techniques: the ''slope'' method and the Nelson number method. The average value of the effective delayed neutron fraction was measured to be 0.0147 +/- 13%, which is significantly higher than the calculated value of 0.009. The discrepancy between the measured and the calculated value is not understood at this time, but it is suspected that the majority of the bias is associated with the measurement of the intrinsic neutron source strength. RP SPRIGGS, GD (reprint author), LOS ALAMOS NATL LAB,POB 1663,MS G783,LOS ALAMOS,NM 87545, USA. NR 9 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 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD SEP PY 1993 VL 115 IS 1 BP 76 EP 80 PG 5 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LV369 UT WOS:A1993LV36900009 ER PT J AU MIHALCZO, JT BLAKEMAN, ED PARE, VK VALENTINE, TE AF MIHALCZO, JT BLAKEMAN, ED PARE, VK VALENTINE, TE TI SUBCRITICALITY OF 2 URANYL-NITRATE FLAT CYLINDRICAL TANKS SPACED IN AIR BY CF-252-SOURCE-DRIVEN NOISE-ANALYSIS SO NUCLEAR TECHNOLOGY LA English DT Article ID SPECTRAL DENSITY-MEASUREMENTS; URANIUM METAL; CF-252 AB The subcritical neutron multiplication factors k for two parallel, axially separated, flat cylindrical tanks separated up to 5 7.91 cm in air and containing enriched uranyl (93.1 wt% U-235) nitrate solution (71.6-cm-i.d. tanks, 8.91-cm solution thickness, 1.555 g/cm3 solution density, and 404 g U/l uranium density) were measured by the Cf-252-source-driven noise analysis method with measured k values varying from 0.99 to 0.80. These measurements were performed at the Los Alamos National Laboratory (LANL) Critical Experiments Facility in 1989 and were part of the program of Westinghouse Idaho Nuclear Company (WINCO) to benchmark calculations or the design of the new storage system at Idaho National Engineering Laboratory. Initial subcriticality measurements by the source-jerk method at LANL had indicated that at a calculated neutron multiplication factor k = 0.95, the measured k was 0.975. This discrepancy was of concern to WINCO because the new storage facility was being designed with a k limit of 0.95, and thus, half of the criticality safety margin of the storage design was equal to the discrepancy between early measurements and calculations The Cf-252-source-driven noise analysis measurements confirmed the validity of the calculational methods. In addition to providing the neutron multiplication factor from point-kinetics interpretation of the data, these measurements also provided the auto-power and cross-power spectral densities as a function of frequency, which can be calculated directly with recently developed Monte Carlo methods and thus could also be used to validate calculational methods and cross-section sets. As with previous measurements with loosely coupled systems, a modified point-kinetics interpretation was successfully used to obtain neutron multiplication factors for measurements with the californium source and detectors located on the same tank. Although the californium source is located on axis but asymmetrically in the system, the detectors adjacent to the radial surface were sufficiently far apart that the correlated information was from long fission chains, which are distributed throughout the system of two tanks. The subcritical neutron multiplication factors obtained from the break frequency noise analysis method agreed with those from the Cf-252-source-driven noise method. These measurements confirmed the criteria from previous experiments for location of the source and detectors to obtain the neutron multiplication factor by using a modified point-kinetics interpretation of the data and again verified the usefulness of this method for interacting systems. C1 UNIV TENNESSEE,DEPT MECH ENGN,KNOXVILLE,TN 37996. RP MIHALCZO, JT (reprint author), OAK RIDGE NATL LAB,DIV INSTRUMENT & CONTROLS,OAK RIDGE,TN 37831, USA. NR 35 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 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD SEP PY 1993 VL 103 IS 3 BP 346 EP 379 PG 34 WC Nuclear Science & Technology SC Nuclear Science & Technology GA LU857 UT WOS:A1993LU85700006 ER PT J AU NGUYEN, HD PAIK, S CHUNG, JN AF NGUYEN, HD PAIK, S CHUNG, JN TI UNSTEADY CONJUGATE HEAT-TRANSFER ASSOCIATED WITH A TRANSLATING SPHERICAL DROPLET - A DIRECT NUMERICAL-SIMULATION SO NUMERICAL HEAT TRANSFER PART A-APPLICATIONS LA English DT Article ID MODERATE REYNOLDS-NUMBERS; FLUID SPHERE; EQUATIONS; FLOW AB Thermal behavior of a liquid drop moving in an incompressible fluid of infinite extent is investigated numerically. Dynamical equations describing the temporal evolution of the flow and temperature fields of dispersed and continuous phases are solved by a hybrid spectral scheme in conjunction with the influence matrix technique to resolve the lack of vorticity boundary conditions. Both Chebyshev and Legendre polynomials are employed to expand the flow variables and temperature in the radial and angular directions, respectively. With the aid of the Galerkin and collocation methods, together with the first-order backward Euler time differencing, the governing partial differential equations reduce to a nonlinear system of algebraic equations. Numerical results reveal a discrepancy between quasi-steady and fully transient analyses at high Peclet numbers. C1 WASHINGTON STATE UNIV,DEPT MECH & MAT ENGN,PULLMAN,WA 99164. RP NGUYEN, HD (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 13 TC 13 Z9 13 U1 0 U2 1 PU HEMISPHERE PUBL CORP PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 1040-7782 J9 NUMER HEAT TR A-APPL JI Numer. Heat Tranf. A-Appl. PD SEP PY 1993 VL 24 IS 2 BP 161 EP 180 DI 10.1080/10407789308902611 PG 20 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA LY315 UT WOS:A1993LY31500003 ER PT J AU LANGERMAN, MA MACKINNON, RJ AF LANGERMAN, MA MACKINNON, RJ TI ESTIMATING NATURAL-CONVECTION IN LOW PRANDTL CAVITY FLOWS SO NUMERICAL HEAT TRANSFER PART A-APPLICATIONS LA English DT Article AB A method is developed for estimating natural convection heat transfer within enclosures for fluids where Pr --> 0. The approach requires a coupled solution to Laplace's equation, describing the velocity field, and Poisson's equation, describing the temperature field. The method is used to calculate the heat transfer within a thermally driven cavity for Pr = 0.06, 0.01, and 0.00). The results obtained are in good agreement with accepted results. RP LANGERMAN, MA (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 7 TC 3 Z9 3 U1 0 U2 1 PU HEMISPHERE PUBL CORP PI BRISTOL PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598 SN 1040-7782 J9 NUMER HEAT TR A-APPL JI Numer. Heat Tranf. A-Appl. PD SEP PY 1993 VL 24 IS 2 BP 221 EP 228 DI 10.1080/10407789308902615 PG 8 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA LY315 UT WOS:A1993LY31500007 ER PT J AU FRIDMAN, A SNYDER, A AF FRIDMAN, A SNYDER, A TI IMPORTANCE OF THE B(S)0-]MU(+)MU(-) BRANCHING FRACTION SO NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS LA English DT Article ID B-MESON DECAY; CP VIOLATION; TOP QUARK; MASS AB We discuss the B(s)0 --> mu+mu- decay channel, which is sensitive to deviations from the standard model. We also consider the B(s)0 mixing information that could be obtained from these decays in the framework of the standard model. Finally, we comment on the experimental difficulties of observing the B(s)0 --> mu+mu-channel. C1 STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA. NR 17 TC 0 Z9 0 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 SEP PY 1993 VL 106 IS 9 BP 1283 EP 1288 DI 10.1007/BF02778214 PG 6 WC Physics, Particles & Fields SC Physics GA ME550 UT WOS:A1993ME55000012 ER PT J AU MOYA, FR GRANNUM, PAT WIDNESS, JA CLEMONS, GK COPEL, JA HOBBINS, JC AF MOYA, FR GRANNUM, PAT WIDNESS, JA CLEMONS, GK COPEL, JA HOBBINS, JC TI ERYTHROPOIETIN IN HUMAN FETUSES WITH IMMUNE HEMOLYTIC-ANEMIA AND HYDROPS-FETALIS SO OBSTETRICS AND GYNECOLOGY LA English DT Article ID ATRIAL-NATRIURETIC-FACTOR; IMMUNOREACTIVE ERYTHROPOIETIN; RH ISOIMMUNIZATION; BLOOD; HEMOGLOBIN; PREMATURITY; DISEASE; OXYGEN; SERUM; LIVER AB Objective: To determine whether plasma erythropoietin is increased in fetuses with anemia due to Rh isoimmunization. Methods: Hemoglobin and erythropoietin were measured in samples obtained by funipuncture from 15 fetuses with Rh isoimmunization (gestational age 26.2 +/- 5.0 weeks, mean +/- standard deviation) and from 13 control fetuses (23.1 +/- 6.7 weeks). Hemoglobin and erythropoietin also were determined in umbilical cord blood collected at birth from 20 term fetuses delivered by elective cesarean. Results: Fetuses with Rh isoimmunization had lower hemoglobin and higher plasma erythropoietin measurements than mid-gestation controls (6.1 +/- 3.9 versus 10.7 +/- 1.5 g/dL and 105.5 +/- 168.1 versus 12.5 +/- 3.1 mU/mL, P < .05, respectively). Hemoglobin and plasma erythropoietin increased with gestational age in control fetuses. There was an inverse association between hemoglobin and plasma erythropoietin in control and Rh-isoimmunized fetuses (r = -0.56, P < .005). Using multiple linear regression, hemoglobin and gestational age were associated independently with plasma erythropoietin (overall F2,25 = 12.3, multiple r2 = 0.49, P < .001). Despite marked decreases in hemoglobin, fetuses below 24 weeks' gestation had minimal increases in plasma erythropoietin compared to fetuses above that gestational age. Mildly anemic Rh-isoimmunized fetuses (hemoglobin 11.6 +/- 2.0 g/dL) delivered vaginally had significantly higher erythropoietin levels in umbilical cord plasma than Rh-isoimmunized fetuses with comparable hemoglobin (10.9 +/- 3.5 g/dL) delivered by elective cesarean without labor (1246 +/- 856 versus 106 +/- 66 mU/mL, respectively, P < .05). Conclusion: Fetuses with anemia at mid to late gestation respond with increases in plasma erythropoietin, but these changes are substantially attenuated before 24 weeks' gestation. C1 YALE UNIV,DEPT PEDIAT,NEW HAVEN,CT 06520. YALE UNIV,DEPT OBSTET & GYNECOL,NEW HAVEN,CT 06520. BROWN UNIV,DEPT PEDIAT,PROVIDENCE,RI 02912. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. NR 28 TC 21 Z9 21 U1 0 U2 0 PU ELSEVIER SCIENCE INC PI NEW YORK PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010 SN 0029-7844 J9 OBSTET GYNECOL JI Obstet. Gynecol. PD SEP PY 1993 VL 82 IS 3 BP 353 EP 358 PG 6 WC Obstetrics & Gynecology SC Obstetrics & Gynecology GA LU534 UT WOS:A1993LU53400008 PM 8355933 ER PT J AU LAVOREL, S GARDNER, RH ONEILL, RV AF LAVOREL, S GARDNER, RH ONEILL, RV TI ANALYSIS OF PATTERNS IN HIERARCHICALLY STRUCTURED LANDSCAPES SO OIKOS LA English DT Article ID SCALES AB Scale-dependent effects of landscape heterogeneity were examined by a series of hierarchically structured maps generated by randomly selecting site suitability at successively finer scales. Examination of the patterns (i.c., the number and size of habitat clusters, the total amount of edge on the map) generated by hierarchical maps shows that the global fraction of suitable sites, P, does not fully explain observed changes in landscape properties. Although p(i) (the fraction of suitable sites within hierarchical level i) must be greater than the critical threshold for connectance (p(c). = 0.5928), it is possible for maps to be fully connected when P is much less than p(c). Clusters are larger on hierarchical maps than random maps when p(i) is greater then p(c), but smaller when p(i) is less than p(c). The grain size within hierarchical levels also affects the structure of the maps, with fine-grained units producing higher total number of clusters than random maps. Several lines of evidence indicate that the patterns of landscape heterogeneity are scale-dependent, making hierarchically structured maps a useful tool for studying landscape patterns at different scales. Because biological processes are sensitive to pattern at particular scales, it is necessary to develop a means to describe and predict changes in landscape pattern with changes in scale. C1 CNRS,CTR ECOL FONCTIONNELLE & EVOLUT,F-34033 MONTPELLIER,FRANCE. OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831. NR 34 TC 62 Z9 64 U1 1 U2 6 PU MUNKSGAARD INT PUBL LTD PI COPENHAGEN PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK SN 0030-1299 J9 OIKOS JI Oikos PD SEP PY 1993 VL 67 IS 3 BP 521 EP 528 DI 10.2307/3545364 PG 8 WC Ecology SC Environmental Sciences & Ecology GA LN449 UT WOS:A1993LN44900014 ER PT J AU TUSS, J AF TUSS, J TI EASY ONLINE ACCESS TO HELPFUL INTERNET GUIDES SO ONLINE LA English DT Article RP TUSS, J (reprint author), ARGONNE NATL LAB,212 LIB,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU ONLINE INC PI WILTON PA 462 DANBURY RD, WILTON, CT 06897-2126 SN 0146-5422 J9 ONLINE JI Online PD SEP PY 1993 VL 17 IS 5 BP 60 EP & PG 0 WC Computer Science, Information Systems; Information Science & Library Science SC Computer Science; Information Science & Library Science GA LW599 UT WOS:A1993LW59900009 ER PT J AU DICKEY, FM DELAURENTIS, JM AF DICKEY, FM DELAURENTIS, JM TI OPTICAL NEURAL NETWORKS WITH UNIPOLAR WEIGHTS SO OPTICS COMMUNICATIONS LA English DT Article ID MULTILAYER FEEDFORWARD NETWORKS; SIGMOID FUNCTION; APPROXIMATION AB A problem in the development of optical neural networks is the difficulty in representing bipolar weights, In this letter, we present a neural network structure that achieves the required approximation properties with unipolar weights. Two theorems are cited that define and prove the network approximation capabilities. RP DICKEY, FM (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0030-4018 J9 OPT COMMUN JI Opt. Commun. PD SEP 1 PY 1993 VL 101 IS 5-6 BP 303 EP 305 DI 10.1016/0030-4018(93)90718-K PG 3 WC Optics SC Optics GA LU631 UT WOS:A1993LU63100002 ER PT J AU WILSON, MA HANNA, JV ANDERSON, KB BOTTO, RE AF WILSON, MA HANNA, JV ANDERSON, KB BOTTO, RE TI H-1 CRAMPS NMR DERIVED HYDROGEN DISTRIBUTIONS IN VARIOUS COAL MACERALS SO ORGANIC GEOCHEMISTRY LA English DT Article DE CRAMPS; H-1 SOLID STATE NMR; COALS; MACERALS; RESINS ID NUCLEAR-MAGNETIC-RESONANCE; SOLID-STATE NMR; NATURALLY-OCCURRING SUBSTANCES; MULTIPLE-PULSE SPECTROSCOPY; LATROBE-VALLEY RESINITES; HIGH-RESOLUTION NMR; MOLECULAR-STRUCTURE; DENSITY FRACTIONS; COMBINED ROTATION; PREMIUM COALS AB The distribution of protons bonded to sp2 and sp3 hybridized carbons in a number of macerals including liptinites and inertinites, has been investigated by C-13 cross polarization magic angle spinning (CP/MAS) and H-1 combined rotation and multiple pulse nuclear magnetic resonance spectroscopy (CRAMPS). Some preliminary H-1-C-13 solid state heterocorrelation spectra of coals and one maceral have also been obtained. CRAMPS was only successful in resolving acidic, aromatic/alkenic, carbohydrate and aliphatic protons in the macerals. The semifusinites had variable (0.38-->0.58) proton aromaticities and (0.40-->0.84) carbon aromaticities, and the liptinite macerals had a low (0.06) fraction of protons attached to sp2 hybridized carbon. Of the nine resinite samples examined, one (Hornerstown) was clearly identified to be a naturally occurring polymer of styrene. The CRAMPS spectra of the other seven were useful, identifying them as carboxylic acids. Two dimensional H-1-C-13 heteronuclear solid state spectroscopy was successful in resolving two types of aliphatic hydrogen in the selected coals studied, with longer range coupling able to be observed in the structurally simpler Hornerstown resinite by implementation of two WIM-24 cross-polarization cycles. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RP WILSON, MA (reprint author), CSIRO,DIV COAL & ENERGY TECHNOL,POB 136,N RYDE,NSW 2113,AUSTRALIA. NR 63 TC 18 Z9 18 U1 0 U2 2 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0146-6380 J9 ORG GEOCHEM JI Org. Geochem. PD SEP PY 1993 VL 20 IS 7 BP 985 EP 999 DI 10.1016/0146-6380(93)90108-N PG 15 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA MC461 UT WOS:A1993MC46100010 ER PT J AU ANDERSON, KB BOTTO, RE AF ANDERSON, KB BOTTO, RE TI THE NATURE AND FATE OF NATURAL RESINS IN THE GEOSPHERE .3. REEVALUATION OF THE STRUCTURE AND COMPOSITION OF HIGHGATE-COPALITE AND GLESSITE SO ORGANIC GEOCHEMISTRY LA English DT Article DE RESINITE; SUCCINATE; GLESSITE; HIGHGATE-COPALITE; CLASSIFICATION; GC-MS; PY-GC-MS ID AMBER AB The results of GC-MS, Py-GC-MS and spectroscopic (solid state C-13 NMR) studies of the structure and composition of two resinites, viz. Highgate Copalite and Glessite, which have been previously described as ''fossil elemi'' are described. GC-MS analyses of Highgate Copalite establish that this resinite is composed of a simple mixture of diterpenoid resin acids and n-alkyl materials. Based on comparison of these data with similar data obtained by analysis of modern rosin, it is concluded that this resinite is most probably derived from the resin of an undetermined species of pine. In order to accommodate resinites of this general character, it is proposed that an additional class, viz: Class V, be added to the classification system for resinites which we have previously proposed (Anderson et al., 1992). Py-GC-MS analysis of Glessite establish that this material is a typical Class la resinite closely related to Succinite (''normal'' or ''typical'' Baltic Amber). It is concluded that the previously assigned structural character of these two resinites is open to question. C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 24 TC 49 Z9 50 U1 0 U2 4 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0146-6380 J9 ORG GEOCHEM JI Org. Geochem. PD SEP PY 1993 VL 20 IS 7 BP 1027 EP 1038 DI 10.1016/0146-6380(93)90111-N PG 12 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA MC461 UT WOS:A1993MC46100013 ER PT J AU STEMMLER, EA BUCHANAN, MV AF STEMMLER, EA BUCHANAN, MV TI NEGATIVE-ION AND POSITIVE-ION CHEMICAL-IONIZATION MASS-SPECTRA OF AROMATIC-AMINES - SURFACE-ASSISTED REACTIONS INVOLVING OXYGEN SO ORGANIC MASS SPECTROMETRY LA English DT Article ID RADICAL REACTIONS; GAS-PHASE; SPECTROMETRY; HYDROCARBONS; DERIVATIVES; DIFFERENTIATION; MECHANISM; REDUCTION; FLUORENE; ANIONS AB The O2-N2 and O2-Ar negative-ion chemical ionization mass spectra of aromatic amines show a series of unusual ions dominated by an addition appearing at [M + 14]-.. Other ions are observed at [M - 12]-., [M + 5]-., [M + 12]-., [M + 28]-. and [M + 30]-.. Ion formation was studied using a quadrupole instrument equipped with a conventional chemical ionization source and a Fourier transform ion cyclotron resonance (FTICR) mass spectrometer. These studies, which included the examination of ion chromatograms, measurement of positive-ion chemical ionization mass spectra, variation of ion source temperature and pressure and experiments with O-18(2), indicate that the [M + 14]-. ion is formed by the electron-capture ionization of analytes altered by surface-assisted reactions involving oxygen. This conversion is also observed under low-pressure conditions following source pretreatment with O2. Experiments with [N-15]aniline, 12,3,4,5,6-H-2(5)]aniline and [C-13(6)]aniline show that the [M + 14]-. ion corresponds to [M + O - 2H]-., resulting from conversion of the amino group to a nitroso group. Additional ions in the spectra of aromatic amines also result from surface-assisted oxidation reactions, including oxidation of the amino group to a nitro group, oxidation and cleavage of the aromatic ring and, at higher analyte concentrations, intermolecular oxidation reactions. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RP STEMMLER, EA (reprint author), BOWDOIN COLL,DEPT CHEM,BRUNSWICK,ME 04011, USA. NR 32 TC 2 Z9 2 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0030-493X J9 ORG MASS SPECTROM JI Org. Mass Spectrom. PD SEP PY 1993 VL 28 IS 9 BP 953 EP 962 DI 10.1002/oms.1210280905 PG 10 WC Chemistry, Organic; Spectroscopy SC Chemistry; Spectroscopy GA LY775 UT WOS:A1993LY77500004 ER PT J AU PHIPPS, CR MICHAELIS, MM AF PHIPPS, CR MICHAELIS, MM TI RENAISSANCE FOR LASER SPACE PROPULSION SO PHOTONICS SPECTRA LA English DT Article RP PHIPPS, CR (reprint author), LOS ALAMOS NATL LAB,TECH STAFF,LOS ALAMOS,NM 87544, USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU LAURIN PUBL CO INC PI PITTSFIELD PA BERKSHIRE COMMON PO BOX 1146, PITTSFIELD, MA 01202 SN 0731-1230 J9 PHOTON SPECTRA JI Photon. Spect. PD SEP PY 1993 VL 27 IS 9 BP 151 EP 154 PG 4 WC Optics SC Optics GA LX211 UT WOS:A1993LX21100034 ER PT J AU KATANO, S FERNANDEZBACA, JA FUNAHASHI, S MORI, N UEDA, Y KOGA, K AF KATANO, S FERNANDEZBACA, JA FUNAHASHI, S MORI, N UEDA, Y KOGA, K TI CRYSTAL-STRUCTURE AND SUPERCONDUCTIVITY OF LA2-XBAXCUO4 (0.03-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.24) SO PHYSICA C LA English DT Article ID HIGH-TC SUPERCONDUCTIVITY; PHASE; LA2-XSRXCUO4; ANOMALIES; OXIDES AB High-resolution neutron powder diffraction has been performed to investigate the crystal structure of La2-xBaxCuO4 as a function of x (0.03 less-than-or-equal-to x less-than-or-equal-to 0.24). The crystal parameters at 115 K refined by profile analysis show that the Cu-planar O(1) bond lengths decrease by 0.008 angstrom when x is increased by 0.1. This result indicates that the overlap of Cu and planar O orbitals, and thus the charge transfer, increases with x. The length of the Cu-apical O(2) bonds decreases at a rate of about one half of that for Cu-O(1), suggesting that the apical oxygens O(2) also play an important role in the charge transfer process. The changes of the Cu-O(1) bond lengths of the compound with x = 0.125 at 15 K are further studied in connection with the structural phase transition to the low-temperature tetragonal (LTT) phase. These results are discussed in terms of their implication for the electronic structure and superconductivity of this system. C1 OAK RIDGE NATL LAB,DIV SOLID STATE PHYS,OAK RIDGE,TN 37831. UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN. RP KATANO, S (reprint author), JAPAN ATOM ENERGY RES INST,DEPT MAT SCI & ENGN,TOKAI,IBARAKI 31911,JAPAN. RI Fernandez-Baca, Jaime/C-3984-2014 OI Fernandez-Baca, Jaime/0000-0001-9080-5096 NR 16 TC 23 Z9 23 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD SEP 1 PY 1993 VL 214 IS 1-2 BP 64 EP 72 DI 10.1016/0921-4534(93)90108-3 PG 9 WC Physics, Applied SC Physics GA LW027 UT WOS:A1993LW02700008 ER PT J AU ABRIKOSOV, AA CAMPUZANO, JC GOFRON, K AF ABRIKOSOV, AA CAMPUZANO, JC GOFRON, K TI EXPERIMENTALLY OBSERVED EXTENDED SADDLE-POINT SINGULARITY IN THE ENERGY-SPECTRUM OF YBA2CU3O6.9 AND YBA2CU4O8 AND SOME OF THE CONSEQUENCES SO PHYSICA C LA English DT Article ID HIGH-TC SUPERCONDUCTORS; FERMI-SURFACE TOPOLOGY AB Angle-resolved photoemission experiments show that the high temperature superconductors YBa2Cu3O6.9 and YBa2Cu4O8 have a spectral density which exhibits an ''extended'' saddle point singularity along the GAMMA-Y symmetry direction, centered on the Y point. This, in turn, leads to a van Hove singularity in the density of states with a divergence stronger than the well-known logarithmic one. We examine the consequences of this singularity in several limiting cases on the superconducting transition temperature, the ratio 2DELTA(O)/T(c), and the isotope effect. We conclude that this singularity alone, although it can possibly lead to sufficiently high transition temperatures and a vanishingly small isotope effect, does not explain the ratio of 2DELTA(O)/T(c) approximately 6 observed experimentally. C1 UNIV ILLINOIS,CHICAGO,IL 60680. RP ABRIKOSOV, AA (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Campuzano, Juan Carlos/G-4358-2012 NR 15 TC 215 Z9 215 U1 2 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD SEP 1 PY 1993 VL 214 IS 1-2 BP 73 EP 79 DI 10.1016/0921-4534(93)90109-4 PG 7 WC Physics, Applied SC Physics GA LW027 UT WOS:A1993LW02700009 ER PT J AU ABRIKOSOV, AA AF ABRIKOSOV, AA TI INFLUENCE OF THE GAP ANISOTROPY ON SUPERCONDUCTING PROPERTIES SO PHYSICA C LA English DT Article ID TC AB Some consequences of the gap anisotropy are considered: the ratio 2DELTA(0)/T(c), the shape of the tunneling conductance curve, and the influence of impurities on T(c). It is demonstrated that anisotropy could be the cause of properties usually attributed to other origins. RP ABRIKOSOV, AA (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. NR 9 TC 64 Z9 64 U1 2 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD SEP 1 PY 1993 VL 214 IS 1-2 BP 107 EP 110 DI 10.1016/0921-4534(93)90114-6 PG 4 WC Physics, Applied SC Physics GA LW027 UT WOS:A1993LW02700014 ER PT J AU DUNFORD, RW BERRY, HG CHENG, S KANTER, EP KURTZ, C ZABRANSKY, BJ LIVINGSTON, AE CURTIS, LJ AF DUNFORD, RW BERRY, HG CHENG, S KANTER, EP KURTZ, C ZABRANSKY, BJ LIVINGSTON, AE CURTIS, LJ TI 2-PHOTON DECAY OF THE 2 S-1(0) STATE IN HE-LIKE BROMINE SO PHYSICAL REVIEW A LA English DT Article ID ONE-ELECTRON ATOMS; LAMB SHIFT; ISOELECTRONIC SEQUENCE; 22S1/2 STATE; 23S1 STATE; HELIUMLIKE; LIFETIME; RATES; HYDROGENLIKE; IONS AB We report a measurement of the lifetime of the 1s2s S-1(0) state in two-electron Br33+. This state decays to the 1s2 S-1(0) ground state only by the simultaneous emission of two photons. Ions in the 1s2s S-1(0) level are produced by excitation of energetic bromine ions in a thin carbon foil. The lifetime is determined by measuring the change in the Tate of two-photon coincidences as a function of the foil-detector separation. The lifetime measurement yields 39.32(32) ps in agreement with a theoretical value of 39.63(16) ps. C1 UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556. UNIV TOLEDO,DEPT PHYS & ASTRON,TOLEDO,OH 43606. RP DUNFORD, RW (reprint author), ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439, USA. RI Kurtz, Chalres/G-1037-2011 OI Kurtz, Chalres/0000-0003-2606-0864 NR 53 TC 19 Z9 19 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 1993 VL 48 IS 3 BP 1929 EP 1936 DI 10.1103/PhysRevA.48.1929 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LX856 UT WOS:A1993LX85600029 ER PT J AU PRIOR, MH HOLT, RA SCHNEIDER, D RANDALL, KL HUTTON, R AF PRIOR, MH HOLT, RA SCHNEIDER, D RANDALL, KL HUTTON, R TI ALIGNMENT OF MAGNETIC SUBSTATES IN DOUBLE-ELECTRON-CAPTURE COLLISIONS SO PHYSICAL REVIEW A LA English DT Article ID SPIN-INDUCED AUTOIONIZATION; RADIATIVE TRANSITION RATES; MULTIPLY CHARGED IONS; LITHIUMLIKE IONS; B-III; ATOM COLLISIONS; LI-I; STATES; SPECTRA; RECALIBRATION AB We have determined the magnetic-substate alignment produced in double-electron capture by the H-like projectiles C5+ and B4+ from He atoms by measuring the anisotropy of the Auger electron emission from the doubly excited 1s2l2l'2L projectile states formed in the collision. This work includes additional measurements and expands upon our previous short communication on the (C5+, He) system [Phys. Rev. A 43, 607 (1991)]. The measurements yield M(L) Substate population fractions which challenge theory at nearly the finest quantum state detail. We observe large differences between the results for B4+ and C5+ over the velocity range 0.25-0.50 a.u. for the substate and total 1s2l2l'2L relative cross sections. Substantial population of M(L) > 0 states shows the importance of rotational coupling in these slow collisions. The large anisotropies observed demonstrate that substantial errors can result from inferring ''cross sections'' from single-angle measurements and the assumption of isotropic electron emission. C1 UNIV WESTERN ONTARIO,DEPT PHYS,LONDON N6A 3K7,ONTARIO,CANADA. LAWRENCE LIVERMORE NATL LAB,DIV V,LIVERMORE,CA 94550. UNIV TORONTO,DEPT CHEM,TORONTO M5S 1A1,ONTARIO,CANADA. LUND UNIV,DEPT PHYS,S-22362 LUND,SWEDEN. RP PRIOR, MH (reprint author), LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720, USA. RI Holt, Richard/C-9125-2013 NR 30 TC 8 Z9 9 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 1993 VL 48 IS 3 BP 1964 EP 1974 DI 10.1103/PhysRevA.48.1964 PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LX856 UT WOS:A1993LX85600033 ER PT J AU FONTES, CJ SAMPSON, DH ZHANG, HL AF FONTES, CJ SAMPSON, DH ZHANG, HL TI METHOD FOR CALCULATING THE ELECTRON-IMPACT IONIZATION OF IONS OF ANY COMPLEXITY SO PHYSICAL REVIEW A LA English DT Article ID HIGHLY CHARGED IONS AB Relativistic,distorted-wave cross sections are calculated for electron-impact ionization from the 21 subshells with n = 3, 4, and 5 in several types of ions. Based on these results and the general, but very simple form for the cross section derived by Sampson and Zhang [Phys. Rev. A 45, 1657 (1992)] a very rapid, but quite accurate method using fits to the reduced cross sections is given. This applies to highly charged ions with any degree of complexity and should be very convenient for use in plasma modeling. The procedure is illustrated by application to inner-shell ionization of Cu-like gold ions, where good agreement is obtained with detailed direct relativistic distorted-wave calculations. C1 PENN STATE UNIV,DEPT ASTRON & ASTROPHYS,UNIV PK,PA 16802. RP FONTES, CJ (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 13 TC 15 Z9 16 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 1993 VL 48 IS 3 BP 1975 EP 1982 DI 10.1103/PhysRevA.48.1975 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LX856 UT WOS:A1993LX85600034 ER PT J AU TANG, CY WOOD, JR PEGG, DJ DELLWO, J ALTON, GD AF TANG, CY WOOD, JR PEGG, DJ DELLWO, J ALTON, GD TI PHOTODETACHMENT AND AUTODETACHMENT OF THE BE-ION SO PHYSICAL REVIEW A LA English DT Article ID NEGATIVE-IONS; ELECTRON-AFFINITY; STATE; THRESHOLD; BERYLLIUM; ENERGY AB The metastable Be anion has been experimentally investigated using a crossed laser-negative-ion-beam apparatus. The Be(2 3P) electron affinity of 261+/-10 meV has been determined by photodetached-electron spectroscopy. It is also demonstrated that the Be(2 3P) excitation energy of 2.723+/-0.007 eV can be determined by means of a hybrid technique involving the use of both autodetached- and photodetached-electron spectroscopies. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. RP TANG, CY (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA. NR 22 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 1993 VL 48 IS 3 BP 1983 EP 1986 DI 10.1103/PhysRevA.48.1983 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LX856 UT WOS:A1993LX85600035 ER PT J AU BALTZ, AJ RHOADESBROWN, MJ WENESER, J AF BALTZ, AJ RHOADESBROWN, MJ WENESER, J TI CALCULATION OF THE CROSS-SECTION FOR E+-E- (K ORBIT) PAIRS BY VERY-HIGH-ENERGY FULLY STRIPPED HEAVY-IONS AT PERTURBATIONAL IMPACT PARAMETERS SO PHYSICAL REVIEW A LA English DT Article AB The cross section for the production of e+-e- (K orbit) pairs by very-high-energy fully stripped heavy ions is calculated for large impact parameters, where perturbation theory is valid. To achieve accuracy a large range of angular momenta and energies is explicitly computed. The remaining high-angular-momentum and high-energy domain are included by means of a modified version of an asymptotic expansion devised by Hall [Phys. Rev. 45, 620 (1934); Rev. Mod. Phys. 8, 358 (1936)]. An approximation to the small-impact-parameter, nonperturbative contribution is taken from previous work to obtain a reliable estimate for the practically important Au79+ on Au79+ cross section. C1 BROOKHAVEN NATL LAB,RELATIVIST HEAVY ION COLLIDER PROJECT,UPTON,NY 11973. RP BALTZ, AJ (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 13 TC 37 Z9 37 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 1993 VL 48 IS 3 BP 2002 EP 2011 DI 10.1103/PhysRevA.48.2002 PG 10 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LX856 UT WOS:A1993LX85600038 ER PT J AU PAYNE, MG ZHANG, JY GARRETT, WR AF PAYNE, MG ZHANG, JY GARRETT, WR TI EFFECT OF PRESSURE-DEPENDENT QUANTUM INTERFERENCE ON THE AC STARK SHIFTING OF 2-PHOTON RESONANCES SO PHYSICAL REVIEW A LA English DT Article ID ENHANCED MULTIPHOTON IONIZATION; MULTI-PHOTON IONIZATION; UNFOCUSED LASER-BEAMS; 3RD-HARMONIC GENERATION; 3-PHOTON RESONANCE; HARMONIC-GENERATION; 4-PHOTON RESONANCE; FREQUENCY-SHIFT; NOBLE-GASES; EXCITATION AB We describe ac Stark shift production and measurement in a two-laser mode where a first laser is tuned through a two-photon resonance between the ground state and an excited state in order to record a line shape for the corresponding resonantly enhanced multiphoton ionization. A second laser is tuned to a fixed wavelength which is close to a resonance between the upper state in the two-photon transition and a third state which has dipole-allowed transitions back to the ground state. At low concentrations the second laser leads to very large ac Stark shifts in the two-photon excitation and in the related resonantly enhanced multiphoton ionization. However, at high concentrations a destructive interference occurs involving the three-photon coupling between the third state and the ground state and the one-photon coupling due to the four-wave-mixing field at frequency 2omega(L1)+/-omega(L2). This interference leads to a pressure-dependent suppression of the amplitude for the third state. When this destructive interference occurs, the ac Stark shift due to the second laser undergoes a corresponding pressure-dependent suppression. The criteria for the pressure to be high enough to completely suppress the ac Stark shift is that the real part of phase mismatch \DELTAk\ at the angular frequency 2omega(L1)+/-omega(L2) and (or) the absorption coefficient beta at the same frequency should be very large, so that with unfocused focused beams \DELTAk\L>5[(DELTA(s)(max)tau\1/2, , where L is the thickness of gas penetrated before the shift is measured, DELTA(s)(max)) is the maximum ac Stark shift at very low pressure, and tau is the pulse length of the lasers. At positions and concentrations such that 1<\DELTAk\L less-than-or-equal-to 2[DELTA(s)(max)tau]1/2 the ac Stark shift is present but the two-photon excitation is suppressed due to a destructive interference between excitation by two photons from the first laser and by two-photon excitation between a four-wave-mixing photon and a photon from the second laser. C1 OAK RIDGE NATL LAB,CHEM PHYS SECT,OAK RIDGE,TN 37831. RP PAYNE, MG (reprint author), GEORGIA SO UNIV,DEPT PHYS,STATESBORO,GA 30460, USA. NR 33 TC 17 Z9 17 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 1993 VL 48 IS 3 BP 2334 EP 2341 DI 10.1103/PhysRevA.48.2334 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LX856 UT WOS:A1993LX85600077 ER PT J AU BERRAH, N HEISER, F WEHLITZ, R LEVIN, J WHITFIELD, SB VIEFHAUS, J SELLIN, IA BECKER, U AF BERRAH, N HEISER, F WEHLITZ, R LEVIN, J WHITFIELD, SB VIEFHAUS, J SELLIN, IA BECKER, U TI PROBING ELECTRON CORRELATIONS IN DOUBLE PHOTOIONIZATION OF HE AT INTERMEDIATE ENERGIES SO PHYSICAL REVIEW A LA English DT Note ID X-RAY REGION; DOUBLE IONIZATION; RARE-GASES; HELIUM; THRESHOLD; IMPACT; NE AB The ratio of double-to-single ionization of He has been measured between 280 and 1210 eV to investigate its behavior in this partially unexplored region. These measurements, compared with the most recent theories of Pan and Kelly (private communication) and of Hino [Phys. Rev. A 47, 4845 (1993)], show the importance of including not only ground-state but also final-state correlations, in contrast to the high-energy behavior discussed by Dalgarno and Sadeghpour [Phys. Rev. A 46, R3591 (1992)] where consideration of final-state correlations proves inessential. Our intermediate-energy results also appear to indicate the importance of including higher-order effects in the theory. C1 WESTERN MICHIGAN UNIV,DEPT PHYS,KALAMAZOO,MI 49008. UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899. OAK RIDGE NATL LAB,OAK RIDGE,TN 37891. RP BERRAH, N (reprint author), MAX PLANCK GESELL,FRITZ HABER INST,W-1000 BERLIN 33,GERMANY. RI Becker, Uwe/A-6604-2013 NR 25 TC 32 Z9 32 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD SEP PY 1993 VL 48 IS 3 BP R1733 EP R1736 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LX856 UT WOS:A1993LX85600003 ER PT J AU HUBERT, S THOUVENOT, P EDELSTEIN, N AF HUBERT, S THOUVENOT, P EDELSTEIN, N TI SPECTROSCOPIC STUDIES AND CRYSTAL-FIELD ANALYSES OF AM3+ AND EU3+ IN THE CUBIC-SYMMETRY SITE OF THO2 SO PHYSICAL REVIEW B LA English DT Article ID ACTINIDE DIOXIDES; NEUTRON SPECTROSCOPY; SPECTRA; LUMINESCENCE; NPO2; IONS; PUO2; UO2 AB Fluorescence and excitation spectra of Am-3+ diluted in ThO2 are reported at room and liquid-helium temperatures along with fluorescence data for Eu3+ diluted in ThO2. The Eu3+ data Can be assigned primarily to magnetic-dipole transitions, but the Am-3+ data appear to be primarily phonon-assisted electric-dipole transitions. Earlier electron-paramagnetic-resonance (EPR) data on Pu-3+ diluted in ThO2 have set limits on the possible ratios of the crystal-field parameters B-0(4)/B-0(6) for this system. Assuming the same ratio should hold for Am-3+-ThO2, the observed transitions were assigned and the values for the crystal-field parameters B-0(4) = -6731 cm-1, B-0(6) = 714 cm-1 were obtained. The B-0(4) value is the same order of magnitude as found earlier in inelastic-neutron-scattering experiments for UO2 and NpO2, but B-0(6) for Am-3+-ThO2 is much smaller than determined in the neutron experiments. C1 LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RP HUBERT, S (reprint author), INST PHYS NUCL LYON,RADIOCHIM LAB,BOITE POSTALE 1,F-91406 ORSAY,FRANCE. NR 35 TC 34 Z9 34 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 5751 EP 5760 DI 10.1103/PhysRevB.48.5751 PG 10 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800002 ER PT J AU WOLVERTON, C DEFONTAINE, D DREYSSE, H AF WOLVERTON, C DEFONTAINE, D DREYSSE, H TI GLOBAL VOLUME RELAXATIONS AND PHASE-STABILITY IN DISORDERED PD-RH ALLOYS SO PHYSICAL REVIEW B LA English DT Article ID TRANSITION-METAL ALLOYS; EFFECTIVE CLUSTER INTERACTIONS; TIGHT-BINDING THEORY; GROUND-STATE; ISING-MODEL; 2ND-NEIGHBOR INTERACTIONS; INTERMETALLIC COMPOUNDS; VARIATION FORMALISM; 1ST-PRINCIPLES; SYSTEM AB The energetics of disordered fcc-based Pd-Rh alloys are determined by a combination of a generalized Ising model and effective-pair and multisite interactions that are explicit functions of the alloy volume. The volume dependence of the interactions is incorporated in the method of direct configurational averaging, which is a real-space, Green-function technique for obtaining the interactions directly from their definition. The first two terms in the generalized Ising Hamiltonian (or cluster expansion), the so-called empty cluster and point interactions, may not be computed simply from one-electron energies; therefore, a technique is described to compute each of these terms from two contributions: (1) total energies of the pure elements, and (2) one-electron energies corresponding to the energy pined upon mixing the constituents of the alloy at a fixed volume. By using the volume-dependent interactions, the formation enthalpy, equilibrium volume, and bulk modulus are computed for the completely disordered alloy as a function of composition. The scheme of computing the volume-dependent interactions is compared with the results of the effective-cluster-interaction calculations from other Hamiltonians, and the results of this comparison explained in terms of the magnitude of the off-diagonal disorder present in each computation. The volume-dependent interactions are combined with the cluster-variation method to compute the solid-state portion of the Pd-Rh phase diagram, with no adjustable or experimentally determined parameters. The agreement between the theoretically predicted and experimentally determined diagrams is excellent. C1 LAWRENCE BERKELEY LAB, DIV MAT SCI, BERKELEY, CA 94720 USA. UNIV CALIF BERKELEY, DEPT MAT SCI & MINERAL ENGN, BERKELEY, CA 94720 USA. UNIV NANCY, PHYS SOLIDE LAB, VANDOEUVRE LES NANCY, FRANCE. RP WOLVERTON, C (reprint author), UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA. RI Wolverton, Christopher/B-7542-2009 NR 48 TC 30 Z9 30 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 5766 EP 5778 DI 10.1103/PhysRevB.48.5766 PG 13 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800004 ER PT J AU DULMAN, HD PANTELL, RH KEPHART, JO BERMAN, BL PARK, H DATZ, S KLEIN, RK SWENT, RL BIAN, ZH AF DULMAN, HD PANTELL, RH KEPHART, JO BERMAN, BL PARK, H DATZ, S KLEIN, RK SWENT, RL BIAN, ZH TI ELECTRON AND POSITRON CHANNELING RADIATION FROM BERYLLIUM-OXIDE SO PHYSICAL REVIEW B LA English DT Article ID RAY-DIFFRACTION; PARTICLES; CRYSTALS; SILICON; BEO AB We present experimental observations of planar and axial channeling radiation emitted by relativistic electrons and positrons traversing a BeO crystal. Values of thermal vibration amplitudes are obtained, and found to be in agreement with those obtained by other methods, namely, x-ray and neutron diffraction. The standard channeling-radiation theory matches correctly the observed radiation spectra when the particle is channeled along principal planes. Some of the planes with higher Miller indices give radiation spectra that can only be explained by the coupling of the particle wave function to neighboring axes or planes, or by population redistribution within the band. C1 IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. GEORGE WASHINGTON UNIV,DEPT PHYS,WASHINGTON,DC 20052. AT&T BELL LABS,MURRAY HILL,NJ 07974. OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. ADV MICRO DEVICES INC,SUNNYVALE,CA 94088. STANFORD UNIV,HIGH ENERGY PHYS LAB,STANFORD,CA 94305. STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305. RP DULMAN, HD (reprint author), STANFORD UNIV,DEPT ELECT ENGN,STANFORD,CA 94305, USA. NR 26 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 5818 EP 5831 DI 10.1103/PhysRevB.48.5818 PG 14 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800009 ER PT J AU SODERLIND, P ERIKSSON, O WILLS, JM BORING, AM AF SODERLIND, P ERIKSSON, O WILLS, JM BORING, AM TI THEORY OF ELASTIC-CONSTANTS OF CUBIC TRANSITION-METALS AND ALLOYS SO PHYSICAL REVIEW B LA English DT Article ID ELECTRONIC-STRUCTURE; BRILLOUIN-ZONE; SPECIAL POINTS; BAND; POTENTIALS; COHESION; SYSTEMS AB We have from first principles calculated the elastic constants (C-11, C-12, and C44) of all nonmagnetic cubic d transition metals, and obtained good agreement with experimental data. We show that the trend exhibited by the tetragonal shear constant in the transition metals can be simply understood. In particular, we show that the trend of the tetragonal shear constant, C', of cubic transition metals and alloys is determined by the energy difference between the fcc and bcc structures of a given system, which in turn is determined by band filling. This finding is in turn due to the result that these systems have a Bains path with similar shape, and our ''canonical'' Bains path illustrates this behavior. The trend of C' is further studied by including selected alloys (thereby obtaining a finer tuning of band-filling effects). The scaling of C' with the bcc-fcc energy difference is found to hold also for the studied alloys (roughly), and the calculated C' is found to agree well with available experimental data. C1 LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP SODERLIND, P (reprint author), UNIV UPPSALA,DEPT PHYS,S-75105 UPPSALA,SWEDEN. RI Eriksson, Olle/E-3265-2014 OI Eriksson, Olle/0000-0001-5111-1374 NR 33 TC 152 Z9 153 U1 1 U2 18 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 5844 EP 5851 DI 10.1103/PhysRevB.48.5844 PG 8 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800012 ER PT J AU MCCALL, KR GUYER, RA JOHNSON, DL AF MCCALL, KR GUYER, RA JOHNSON, DL TI MAGNETIZATION EVOLUTION IN CONNECTED PORE SYSTEMS .2. PULSED-FIELD-GRADIENT NMR AND PORE-SPACE GEOMETRY SO PHYSICAL REVIEW B LA English DT Article ID RELAXATION; DIFFUSION; RESONANCE; ROCKS AB The time evolution of nuclear magnetization in a porous medium, e.g., proton dipole moments on water saturating a sandstone, can be described in terms of relaxation-operator eigenstates (modes of the magnetization). Decay of the magnetization in a pulsed-field-gradient NMR (PFGNMR) or stimulated-echo experiment is described by the intermediate scattering function (ISF). The ISF is a sensitive probe of the spatial structure of the modes of the magnetization. We have studied the time evolution of the magnetization and the behavior of the ISF by solving the relaxation-operator problem. A suitable set of PFGNMR measurements provides important information about the pore-space geometry, for example, the gradient-independent part of the spectrum of decay rates is contributed by large or isolated pores. C1 UNIV MASSACHUSETTS,DEPT PHYS & ASTRON,AMHERST,MA 01003. SCHLUMBERGER DOLL RES CTR,RIDGEFIELD,CT 06877. RP MCCALL, KR (reprint author), LOS ALAMOS NATL LAB,DIV EARTH & ENVIRONM SCI,MS D443,LOS ALAMOS,NM 87545, USA. NR 14 TC 13 Z9 14 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 5997 EP 6006 DI 10.1103/PhysRevB.48.5997 PG 10 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800029 ER PT J AU BATISTIC, I HUANG, XZ BISHOP, AR SAXENA, A AF BATISTIC, I HUANG, XZ BISHOP, AR SAXENA, A TI IONIC INTERACTIONS IN PLATINUM CHLORIDE LINEAR-CHAIN COMPOUNDS SO PHYSICAL REVIEW B LA English DT Article ID METAL-COMPLEXES; VALENCE; ASYMMETRY; ELECTRON; STATE AB Halogen-bridged transition-metal chain compounds have recently emerged as an important class of low-dimensional electronic materials with strong electron-lattice and electron-electron interactions. We introduce a many-body model for such materials which is quantitatively successful for highly valence-localized (strong charge-density-wave) members of the class, e.g., PtCl with various ligand structures. The model introduces nearest-neighbor Coulomb attraction and metal ion-ion electrostatic repulsion directly rather than through a linear Peierls-Hubbard Hamiltonian. These interactions have the effects of (i) modifying the on-site orbital energies, (ii) generating an effective anharmonic intrasite electron-lattice coupling (leading to the formation of a charge-density-wave even if the intersite electron-lattice coupling is weak), and (iii) acting as an effective anharmonic elastic force between neighboring metal and halogen atoms. The stoichiometric ground state and various defect states (polaron, bipolaron, kink, exciton) are studied within this framework by computing their optical absorption, Raman, and infrared spectra: The results agree well with available experimental data. Buckling of Cl atoms out of the chain axis in certain PtCl compounds is predicted to be important in order to obtain the observed Raman frequencies for electron polarons and bipolarons. Finally, a strong ''template'' effect is discussed by comparing two PtCl materials with different ligands and counterions. C1 LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA. RP BATISTIC, I (reprint author), UNIV ZAGREB, INST PHYS, POB 304, 41001 ZAGREB, CROATIA. NR 23 TC 18 Z9 18 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6065 EP 6073 DI 10.1103/PhysRevB.48.6065 PG 9 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800038 ER PT J AU WEI, SH ZUNGER, A AF WEI, SH ZUNGER, A TI ELECTRONIC ORIGINS OF THE MAGNETIC PHASE-TRANSITIONS IN ZINCBLENDE MN CHALCOGENIDES SO PHYSICAL REVIEW B LA English DT Article ID STATISTICAL-MECHANICS; BAND THEORY; CD1-XMNXTE; SEMICONDUCTOR; EXCHANGE; ANTIFERROMAGNETISM; SUPERLATTICES; MOLECULES; SURFACES; ALLOY AB Precise first-principles spin-polarized total-energy and band-structure calculations have been performed for the zinc-blende Mn chalcogenides with the use of the local-spin-density (LSD) approach. We find that the LSD is capable of identifying the correct magnetic-ground-state structure, but it overestimates the ordering temperature T(N) and the valence-band exchange splitting DELTA(x)p. The discrepancy is attributed to the overestimation by LSD of the p-d coupling. Adjusting this coupling by an external potential and fitting its parameters to the s- and p-band exchange splitting in MnTe alone, we find that T(N) = 73, 90, and 128 K, respectively, for MnTe, MnSe, and MnS, in good agreement with experiment. This shows that the failures of the LSD in reproducing T(N) and DELTA(x)p share a common physical origin, namely the overestimation of p-d coupling. RP WEI, SH (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. RI Zunger, Alex/A-6733-2013 NR 35 TC 55 Z9 55 U1 3 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6111 EP 6115 DI 10.1103/PhysRevB.48.6111 PG 5 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800043 ER PT J AU LOONG, CK SODERHOLM, L GOODMAN, GL ABRAHAM, MM BOATNER, LA AF LOONG, CK SODERHOLM, L GOODMAN, GL ABRAHAM, MM BOATNER, LA TI GROUND-STATE WAVE-FUNCTIONS OF TB3+ IONS IN PARAMAGNETIC TBPO4 - A NEUTRON-SCATTERING STUDY SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC-PROPERTIES; HEAT AB The paramagnetic-excitation spectrum of TbPO4 has been investigated by means of inelastic neutron-scattering techniques, and the observed crystal-field transitions were analyzed using a Hamiltonian that included the atomic free-ion and crystal-field interactions for an f8 configuration. Five parameters for the crystal-field potential were obtained that provided a satisfactory description of the neutron data collected at temperatures between 4.2 and 150 K. The calculated crystal-field contribution to the specific heat in the 4-10 K temperature range and the paramagnetic susceptibility agree well with the experimental results. The large anisotropy of the magnetic ground-state doublet of the Tb ions with respect to the crystallographic c axis has important consequences for the spin structure in the antiferromagnetic phases at low temperatures. The effective internal magnetic field in antiferromagnetic TbPO4 was estimated based on the crystal-field-level scheme and a molecular-field approximation and was found to be in good agreement with the values reported from other measurements. C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP LOONG, CK (reprint author), ARGONNE NATL LAB,DIV CHEM & MAT SCI,INTENSE PULSED NEUTRON SOURCE,ARGONNE,IL 60439, USA. RI Boatner, Lynn/I-6428-2013 OI Boatner, Lynn/0000-0002-0235-7594 NR 43 TC 23 Z9 23 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6124 EP 6131 DI 10.1103/PhysRevB.48.6124 PG 8 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800045 ER PT J AU CABLE, JW WAKABAYASHI, N RADHAKRISHNA, P AF CABLE, JW WAKABAYASHI, N RADHAKRISHNA, P TI MAGNETIC EXCITATIONS IN THE TRIANGULAR ANTIFERROMAGNETS MN3SN AND MN3GE SO PHYSICAL REVIEW B LA English DT Article ID CHROMIUM AB Inelastic neutron scattering was used to study the magnetic excitations of the triangular antiferromagnets Mn3Sn and Mn3Ge. These compounds have itinerant d electrons and large magnetic moments localized at the Mn sites and may be regarded as materials that lie in the intermediate regime between local-moment and itinerant-electron systems. The spin-wave spectra exhibit steep dispersion and strong damping, which is characteristic behavior of itinerant-electron systems. Nevertheless, it is useful to analyze the data in terms of a local-moment model with anisotropy. We find the data are remarkably well described by this model with exchange parameters extending to fifth-nearest neighbors and with both axial- and basal-plane anisotropy. The axial-anisotropy parameters were determined from the uniform out-of-plane spin fluctuation, and the signs show that the spins are confined to the basal plane. The second-order basal-plane anisotropy constants were determined by satisfying both the magnitude of the weak basal-plane ferromagnetic moments and the observed splitting of a doubly degenerate acoustic-spin-wave branch. The sixth-order basal-plane anisotropy was determined by adjusting to the observed energy gap associated with spin fluctuations within the basal plane. The exchange parameters have the correct sips to stabilize the triangular antiferromagnetic structure but yield Neel temperatures that are higher than those observed by a factor of 3 or 4. This overestimation of the Neel temperature is not an uncommon result when a local moment model is applied to an itinerant-electron system. C1 KEIO UNIV,DEPT PHYS,KOHOKU KU,YOKOHAMA,KANAGAWA 223,JAPAN. JAWAHARLAL NEHRU CTR ADV SCI RES,BANGALORE 560012,INDIA. RP CABLE, JW (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA. NR 16 TC 6 Z9 6 U1 4 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 SEP 1 PY 1993 VL 48 IS 9 BP 6159 EP 6166 DI 10.1103/PhysRevB.48.6159 PG 8 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800052 ER PT J AU BHANOT, G CREUTZ, M GLASSNER, U HORVATH, I LACKI, J SCHILLING, K WECKEL, J AF BHANOT, G CREUTZ, M GLASSNER, U HORVATH, I LACKI, J SCHILLING, K WECKEL, J TI LOW-TEMPERATURE EXPANSIONS FOR POTTS MODELS SO PHYSICAL REVIEW B LA English DT Article ID SERIES ANALYSIS; ISING-MODEL AB On simple-cubic lattices, we compute low-temperature series expansions for the energy, magnetization, and susceptibility of the three-state Potts model in D = 2 and D = 3 to 45 and 39 excited bonds, respectively, and the eight-state Potts model in D = 2 to 25 excited bonds. We use a recursive procedure that enumerates states explicitly. We analyze the series with Dlog Pade analysis and inhomogeneous differential approximants. C1 INST ADV STUDY,PRINCETON,NJ 08540. BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV GESAMTHSCH WUPPERTAL,DEPT PHYS,W-5600 WUPPERTAL 1,GERMANY. UNIV ROCHESTER,DEPT PHYS,ROCHESTER,NY 14627. PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544. RP BHANOT, G (reprint author), THINKING MACHINES CORP,245 1ST ST,CAMBRIDGE,MA 02142, USA. NR 22 TC 18 Z9 18 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6183 EP 6191 DI 10.1103/PhysRevB.48.6183 PG 9 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800055 ER PT J AU MIN, BI KANG, JS HONG, JH JEONG, JI LEE, YP CHOI, SD LEE, WY YANG, CJ OLSON, CG AF MIN, BI KANG, JS HONG, JH JEONG, JI LEE, YP CHOI, SD LEE, WY YANG, CJ OLSON, CG TI ELECTRONIC AND MAGNETIC-STRUCTURES OF THE RARE-EARTH PERMANENT-MAGNET ND2FE14B SO PHYSICAL REVIEW B LA English DT Article ID Y2FE14B; METALS; MOSSBAUER; R2FE14B; MOMENTS; STATES; SPIN; 4F AB Electronic and magnetic structures of Nd2Fe14B are investigated by performing self-consistent local-density-approximation band-structure calculations and photoemission-spectroscopy (PES) measurements. Employing the linear muffin-tin-orbital band method, we have obtained electronic band structures for both paramagnetic and ferromagnetic phases of Nd2Fe14B, and compared the calculated density of states (DOS) with the experimental data obtained from PES measurements. It is found that B atoms contribute to the stabilization of the structure and substantially reduce the magnetic moment of neighboring Fe atoms through a hybridization interaction. The average magnetic moment of Fe atoms in the ferromagnetic phase is estimated to be 2.15 mu(B). Depending on the distances from B atoms, Fe atoms at the j2 site and those at the e site have the largest and smallest magnetic moments, respectively, in qualitative agreement with the experimental trend. The valence-band PES measurements for Nd 4f states indicate that the Nd valence is close to trivalent, with negligible Nd 4f spectral intensity close to E(F), which is consistent with the observed trivalent Nd 4f magnetic moments in this compound. The line shape of the Nd 4f PES is broader than that of pure Nd metal, reflecting effects of the hybridization between Nd 4f and Fe 3d electrons. The Fe 3d PES spectrum shows that the Fe 3d electrons mainly determine the DOS near E(F). The calculated Fe 3d projected local density of states agrees reasonably well with the Fe 3d PES spectrum, which implies that the Fe 3d magnetism in Nd2Fe14B may well be understood in terms of the itinerant magnetism of Fe 3d electrons. C1 RES INST IND SCI & TECHNOL, POHANG 790600, SOUTH KOREA. IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA. RP POHANG INST SCI & TECHNOL, DEPT PHYS, POHANG 790600, SOUTH KOREA. NR 33 TC 11 Z9 12 U1 3 U2 13 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6217 EP 6224 DI 10.1103/PhysRevB.48.6217 PG 8 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800060 ER PT J AU NORMAN, MR AF NORMAN, MR TI EFFECT OF MATRIX-ELEMENTS ON THE PAIRING KERNEL IN HEAVY-FERMION SUPERCONDUCTORS SO PHYSICAL REVIEW B LA English DT Article ID UPT3; PHASE AB A method is derived for calculating the pairing kernel in heavy-fermion superconductors including matrix-element effects. Various models for the interaction vertex are considered, including pseudospin exchange, orbital exchange, and quadrupolar exchange. As an example, this formalism is applied to UPt3 with the use of relativistic wave functions from a local-density-band calculation. RP NORMAN, MR (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Norman, Michael/C-3644-2013 NR 25 TC 3 Z9 3 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6315 EP 6318 DI 10.1103/PhysRevB.48.6315 PG 4 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800072 ER PT J AU GRONBECHJENSEN, N LOMDAHL, PS SAMUELSEN, MR AF GRONBECHJENSEN, N LOMDAHL, PS SAMUELSEN, MR TI FLUXON BUNCHING IN SUPERCURRENT-COUPLED JOSEPHSON-JUNCTIONS SO PHYSICAL REVIEW B LA English DT Article ID SINE-GORDON EQUATION; SOLITON OSCILLATORS; DYNAMICS; SYSTEMS; CHAINS AB We investigate analytically and numerically the interaction between fluxons of different Josephson junctions coupled through Cooper-pair tunneling. We find that the supercurrent interaction gives rise to attraction between fluxons regardless of their polarity, although fluxons of different polarity are found to interact with a binding energy of an order of magnitude larger than between unipolar fluxons. When bias current is applied to a system of two coupled junctions we can analytically evaluate the range in the difference of the bias currents for which fluxons are bound. The differences in interaction between fluxons of equal and opposite polarity are discussed. Numerical simulations of coupled sine-Gordon equations agree very well with the analytical predictions. C1 TECH UNIV DENMARK,DEPT PHYS,DK-2800 LYNGBY,DENMARK. RP GRONBECHJENSEN, N (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 16 TC 5 Z9 5 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6353 EP 6359 DI 10.1103/PhysRevB.48.6353 PG 7 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800077 ER PT J AU VORENKAMP, T ARONSON, MC KOZIOL, Z BAKKER, K FRANSE, JJM SMITH, JL AF VORENKAMP, T ARONSON, MC KOZIOL, Z BAKKER, K FRANSE, JJM SMITH, JL TI SUBSTITUTION STUDIES AND THE NATURE OF SUPERCONDUCTIVITY IN UPT3 SO PHYSICAL REVIEW B LA English DT Article ID HEAVY-FERMION SUPERCONDUCTORS; RESONANT IMPURITY SCATTERING; MAGNETIC-FIELD PENETRATION; TEMPERATURE-DEPENDENCE; UNCONVENTIONAL SUPERCONDUCTIVITY; PHASE-DIAGRAM; ANISOTROPIC SUPERCONDUCTORS; ULTRASONIC-ATTENUATION; TRANSPORT-PROPERTIES; DOUBLE TRANSITION AB The influence of substitutions on the superconductivity in the systems (U1-xYx)Pt3, (U1-xThx)Pt3, and U(Pt1-xPdx)3 have been studied by resistance and specific-heat measurements for T < 1 K. The results of yttrium and thorium substitution are discussed in terms of the models developed by Hirschfeld et al. and Schmitt-Rink et al. in which the power laws in the low-temperature behavior of several properties are calculated under the assumption of resonant impurity scattering. Both yttrium and palladium are concluded to have a pair-breaking effect in UPt3. For palladium substitution an increase of DELTAT(c) = T(c1) - T(c2) with concentration is reported. The importance of these results for the question of the nature of the order parameter and for the hypothesis of a coupling between the superconducting and magnetic order parameter is discussed. C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP VAN DER WAALS ZEEMAN LAB, VALCKENIERST 65, 1018 XE AMSTERDAM, NETHERLANDS. NR 74 TC 24 Z9 24 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6373 EP 6384 DI 10.1103/PhysRevB.48.6373 PG 12 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800079 ER PT J AU ZHU, YM CAI, ZX BUDHANI, RC SUENAGA, M WELCH, DO AF ZHU, YM CAI, ZX BUDHANI, RC SUENAGA, M WELCH, DO TI STRUCTURES AND EFFECTS OF RADIATION-DAMAGE IN CUPRATE SUPERCONDUCTORS IRRADIATED WITH SEVERAL-HUNDRED-MEV HEAVY-IONS SO PHYSICAL REVIEW B LA English DT Article ID CU-O CRYSTALS; SINGLE-CRYSTALS; IRREVERSIBILITY LINE; MAGNETIC INSULATORS; COLUMNAR DEFECTS; YBA2CU3O7-DELTA; FILMS; OXIDES; TRACK AB This paper reports a study of the nature and systematic variation of radiation damage to cuprate superconductors caused by several-hundred-MeV heavy ions. While irradiation Of YBa2Cu3O7-delta with 300-MeV Au24+ and 276-MeV Ag21+ ions produces columns of amorphous material along the ion trajectories, such defects are only created occasionally during irradiation with 236-MeV Cu18+ and not induced with 182-MeV Si13+. A comparative study of the defect formation in Bi2Sr2Ca2Cu3Ox and oxygen-reduced and ozone-treated YBa2Cu3O7-delta, shows that the degree of the radiation damage by the heavy ions depends on (a) the rate at which ions lose their energy in the target; (b) the crystallographic orientations with respect to the incident ion beam; (c) thermal conductivity and chemical state (oxygen concentration for YBa2Cu3O7-delta) of the sample; and (d) the extent of preexisting defects in the crystal. A theoretical model based on ion-induced localized melting and the effects of anisotropic thermal conductivity of these materials provides a basis for understanding the size and shape of the amorphous tracks. Measurements of the superconducting properties of Au24+- and Ag21+-irradiated YBa2Cu3O7-delta thin films show a universal linear scaling between the fractional areal damage versus the superconducting transition temperature and the normal-state resistivity. RP ZHU, YM (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,DIV MAT SCI,UPTON,NY 11973, USA. NR 44 TC 169 Z9 171 U1 4 U2 12 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6436 EP 6450 DI 10.1103/PhysRevB.48.6436 PG 15 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800086 ER PT J AU NORTON, DP LOWNDES, DH AF NORTON, DP LOWNDES, DH TI TRANSPORT-PROPERTIES OF ULTRATHIN YBA2CU3O7-DELTA LAYERS - EVIDENCE FOR 2-DIMENSIONAL VORTEX FLUCTUATIONS SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTORS; TWO-DIMENSIONAL SUPERCONDUCTORS; KOSTERLITZ-THOULESS TRANSITION; YBA2CU3O7-X/PRBA2CU3O7-X SUPERLATTICES; COULOMB-GAS; FILMS; CROSSOVER; BEHAVIOR AB We report on the transport properties of ultrathin YBa2Cu3O7-delta (YBCO) layers, and compare the results with predictions of the Ginzburg-Landau Coulomb-gas (GLCG) model for two-dimensional (2D) vortex fluctuations. We find that the normalized flux-flow resistances for several ultrathin YBCO structures collapse onto a single universal curve, as predicted by the model. In addition, the values for the Kosterlitz-Thouless transition temperature T(KT) and the Ginzburg-Landau temperature, T(c0), obtained by separate analyses of I-V and resistance data within the context of the GLCG model, are in general agreement. Finally, we find that the properties of a series of YBCO/Pr0.5Ca0.5Ba2Cu3O7-delta superlattice structures are consistent with the GLCG treatment for anisotropic, 3D layered superconductors. RP NORTON, DP (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA. NR 26 TC 40 Z9 40 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 SEP 1 PY 1993 VL 48 IS 9 BP 6460 EP 6464 DI 10.1103/PhysRevB.48.6460 PG 5 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800089 ER PT J AU SCHIRBER, JE BAYLESS, WR CHOU, FC JOHNSTON, DC CANFIELD, PC FISK, Z AF SCHIRBER, JE BAYLESS, WR CHOU, FC JOHNSTON, DC CANFIELD, PC FISK, Z TI PRESSURE-DEPENDENCE OF THE SUPERCONDUCTING TRANSITION-TEMPERATURE OF SUPEROXYGENATED LA2CUO4+DELTA SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC-PROPERTIES AB We report the pressure dependence of the superconducting transition temperatures (T(c)) of two phases of superoxygenated La2CuO4+delta Prepared by both high-pressure and electrochemical charging with oxygen. The results are strikingly different from those observed in La1.85Sr0.15CuO4, which has a similar maximum value for T(c). The results are discussed in the framework of a model in which a positive contribution to the pressure derivative ubiquitous to the copper oxide superconductors is canceled to varying degree by a negative derivative due to charge transfer associated with oxygen mobility which depends upon the temperature at which the pressure is applied. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011. RP SCHIRBER, JE (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. RI Canfield, Paul/H-2698-2014 NR 15 TC 18 Z9 18 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6506 EP 6508 DI 10.1103/PhysRevB.48.6506 PG 3 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800096 ER PT J AU BENNAHMIAS, M BELLO, AF BACK, D RADOUSKY, HB GOODWIN, TJ KLAVINS, P SHELTON, RN AF BENNAHMIAS, M BELLO, AF BACK, D RADOUSKY, HB GOODWIN, TJ KLAVINS, P SHELTON, RN TI MAGNETIC-PROPERTIES OF POLYCRYSTALLINE R1.5CE0.5SR2CU2NBO10 (R=EU, ND, AND SM) HIGH-T(C) SUPERCONDUCTING CERAMICS SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTORS; CRITICAL-STATE MODELS; LOWER CRITICAL FIELDS; SINGLE-CRYSTAL; CRITICAL CURRENTS; CURRENT DENSITIES; CU-O; LAYERED SUPERCONDUCTORS; ACTIVATION-ENERGIES; GLASS BEHAVIOR AB Magnetic characterization has been performed on the superconducting members of the R1.5Ce0.5Sr2Cu2NBO10 (R = Eu, Nd, and Sm) series. These materials are related to the YBa2Cu3O7-delta structure through the replacement of the CuO chains with NbO2 planes, and the single rare-earth elements with a R2O2 fluorite structure. Measurements of the lower critical-field curve, irreversibility line, volume fraction, Meissner fraction, and magnetic relaxation are reported for each compound. No evidence of intergrain weak-link behavior down to 0.1 Oe is observed. Estimates of the zero-field intragrain critical current density from high-field hysteresis curves taken at 6 K for the Nd-, Sm-, and Eu-based systems are 2.7 x 10(4), 3.3 x 10(4), and 4.7 x 10(4) A/cm2, respectively. C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616. RP BENNAHMIAS, M (reprint author), UNIV CALIF DAVIS LIVERMORE,DEPT APPL SCI,LIVERMORE,CA 94550, USA. NR 61 TC 5 Z9 5 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6525 EP 6532 DI 10.1103/PhysRevB.48.6525 PG 8 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800100 ER PT J AU KATANO, S FUNAHASHI, S MORI, N UEDA, Y FERNANDEZBACA, JA AF KATANO, S FUNAHASHI, S MORI, N UEDA, Y FERNANDEZBACA, JA TI PRESSURE EFFECTS ON THE STRUCTURAL PHASE-TRANSITIONS AND SUPERCONDUCTIVITY OF LA2-XBAXCUO4 (X = 0.125) SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TC SUPERCONDUCTIVITY; DOPED LA2CUO4; BA; DEPENDENCE AB Neutron-diffraction experiments have been performed to study the effects of hydrostatic pressure on the structural phase transitions of La2-xBaxCuO4 with x = 0.125. The phase transition to the low-temperature tetragonal (LTT) structure is greatly suppressed by the application of pressure. The LTT transition temperature, observed at around 80 K at ambient pressure, decreases at the rate of about -135 K/GPa, and this LTT phase disappears under a pressure of around 0.6 GPa. The superconducting properties of this compound under high pressure have also been investigated in detail by measurements of the ac magnetic susceptibility. The bulk superconducting transition temperature T(c) remains constant at pressures of up to 0.5 GPa, and then increases with pressure at the rate of 10 K/GPa up to about 15 K at 1.5 GPa, From these results it is concluded that there is a clear correlation between the disappearance of the LTT phase and the enhancement of superconductivity. This conclusion supports earlier suggestions that there is a strong relationship between the crystal structure and superconductivity and that, in particular, the LTT phase is detrimental to the superconductivity in the La2-xBaxCuO4 system. C1 UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN. OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. RP KATANO, S (reprint author), JAPAN ATOM ENERGY RES INST,DEPT MAT SCI & ENGN,TOKAI,IBARAKI 31911,JAPAN. RI Fernandez-Baca, Jaime/C-3984-2014 OI Fernandez-Baca, Jaime/0000-0001-9080-5096 NR 18 TC 32 Z9 32 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6569 EP 6574 DI 10.1103/PhysRevB.48.6569 PG 6 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800105 ER PT J AU ZIMANYI, GT BEDELL, KS AF ZIMANYI, GT BEDELL, KS TI ANTIFERROMAGNETIC MARGINAL FERMI-LIQUID SO PHYSICAL REVIEW B LA English DT Article ID HUBBARD-MODEL; NORMAL STATE; CU; RELAXATION; BEHAVIOR; SUPERCONDUCTIVITY; METALS; GAS AB The infrared singularities of the marginal-Fermi-liquid theory are treated within a perturbative renormalization-group approach for the original, weakly-momentum-dependent model. Then an alternative framework is introduced: marginal Fermi liquids with strong antiferromagnetic fluctuations. The models in both cases are found to be stable in a limited range of parameters, otherwise non-Fermi-liquid behavior is obtained. Comparison with experiments on the conductivity and spin susceptibility yields quite reasonable agreement between theory and the data in the case of the antiferromagnetic formulation. Trends with the doping and differences between copper and oxygen relaxation rates also gain a natural explanation. Analogies with the Luttinger-liquid ideas are also explored. Finally the antiferromagnetic marginal Fermi liquid offers clues about the microscopic origin of the anomalous fluctuations as well, as we find that the antiferromagnetic model is the minimal model capable of supporting a fixed line of the scaling equations, making it a promising candidate for the microscopic foundation of high-temperature superconductivity. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. RP ZIMANYI, GT (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA. NR 36 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 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6575 EP 6587 DI 10.1103/PhysRevB.48.6575 PG 13 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800106 ER PT J AU YONEMITSU, K BISHOP, AR AF YONEMITSU, K BISHOP, AR TI INSTABILITY OF VORTEX TEXTURES IN THE 2-DIMENSIONAL HUBBARD-MODEL SO PHYSICAL REVIEW B LA English DT Note ID PHASE-APPROXIMATION APPROACH; SPIN-DENSITY WAVE; DOPED ANTIFERROMAGNET; HARTREE-FOCK; BAG MECHANISM; DOMAIN-WALLS; STATES; SUPERCONDUCTIVITY; EXCITATIONS; POLARONS AB The Hubbard model on a two-dimensional square lattice is investigated within an unrestricted, inhomogeneous Hartree-Fock approximation. Vortexlike states discussed by Verges et al. [Phys. Rev. B 43, 6099 (1991)] are studied in detail. They are found to be unstable against transverse spin fluctuations. Doping of holes does not suppress these fluctuations strongly enough to stabilize the vortex states. C1 LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545. NR 26 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6680 EP 6682 DI 10.1103/PhysRevB.48.6680 PG 3 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800126 ER PT J AU AHRENS, ET HAMMEL, PC HEFFNER, RH REYES, AP SMITH, JL CLARK, WG AF AHRENS, ET HAMMEL, PC HEFFNER, RH REYES, AP SMITH, JL CLARK, WG TI NMR DETERMINATION OF THE B-SUBSTITUTIONAL SITE IN UBE13-XBX SO PHYSICAL REVIEW B LA English DT Note ID FIELD AB We report Be-9, B-10, and B-11 NMR measurements in U(Be,B)13 which show an exclusive substitution site for the boron dopant into the m3 or cubic site of the UBe13 lattice. C1 UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. RP AHRENS, ET (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. RI Hammel, P Chris/O-4845-2014 OI Hammel, P Chris/0000-0002-4138-4798 NR 14 TC 5 Z9 5 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6691 EP 6694 DI 10.1103/PhysRevB.48.6691 PG 4 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800129 ER PT J AU FU, CL YE, YY YOO, MH HO, KM AF FU, CL YE, YY YOO, MH HO, KM TI EQUILIBRIUM-POINT DEFECTS IN INTERMETALLICS WITH THE B2 STRUCTURE - NIAL AND FEAL SO PHYSICAL REVIEW B LA English DT Note ID ELECTRONIC-STRUCTURE; ALUMINIDES AB Equilibrium point defects and their relation to the contrasting mechanical behavior of NiAl and FeAl are investigated. For NiAl, the defect structure is dominated by two types of defects-monovacancies on the Ni sites and substitutional antisite defects on the Al sites. The defect structure of FeAl differs from that of NiAl in the occurrence of antisite defects at the transition-metal sites for Al-rich alloys and the tendency for vacancy clustering. The strong ordering (and brittleness) of NiAl is attributed mainly to the difference in atomic size between constituent atoms. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP FU, CL (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. NR 15 TC 208 Z9 210 U1 1 U2 18 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6712 EP 6715 DI 10.1103/PhysRevB.48.6712 PG 4 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800135 ER PT J AU SENGUPTA, S SHI, DL SERGEENKOV, S MCGINN, PJ AF SENGUPTA, S SHI, DL SERGEENKOV, S MCGINN, PJ TI NONLINEAR U(J) LAW FROM MAGNETIC-RELAXATION IN BI2SR2CACU2OX SINGLE-CRYSTALS - FLUX MOTION THROUGH DOUBLE-KINK FORMATION OF THE PANCAKE VORTICES SO PHYSICAL REVIEW B LA English DT Note ID HIGH-TC SUPERCONDUCTORS; CREEP ACTIVATION-ENERGY; BA-CU-O; CURRENT-DENSITY; TEMPERATURE-DEPENDENCE; FILMS; FIELD; YBA2CU3O7-X; STATE; MODEL AB We have studied magnetic relaxation in a single crystal of Bi2Sr2CaCu2Ox and have developed the U-j relationship by an approach we devised earlier. We explain this nonlinear U-j relationship based on the essential modification of the local pinning potential profile associated with flux motion through double-kink formation of the pancake vortices. The important microscopic parameters such as condensation energy, screening length, and vortex core energy have been extracted from the experimental data. An implication of the U(j) law on the voltage-current E-j characteristics is discussed as well. C1 STATE UNIV LIEGE,INST PHYS,SUPRAS,B-4000 LIEGE,BELGIUM. UNIV NOTRE DAME,DEPT ELECT ENGN,CTR MAT SCI & ENGN,NOTRE DAME,IN 46556. RP SENGUPTA, S (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. RI Sergeenkov, Sergei/D-5842-2011 OI Sergeenkov, Sergei/0000-0001-8080-2940 NR 35 TC 5 Z9 5 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 9 BP 6736 EP 6739 DI 10.1103/PhysRevB.48.6736 PG 4 WC Physics, Condensed Matter SC Physics GA LX348 UT WOS:A1993LX34800141 ER PT J AU MCCORMACK, R ASTA, M DEFONTAINE, D GARBULSKY, G CEDER, G AF MCCORMACK, R ASTA, M DEFONTAINE, D GARBULSKY, G CEDER, G TI HCP ISING-MODEL IN THE CLUSTER-VARIATION APPROXIMATION SO PHYSICAL REVIEW B LA English DT Article ID GROUND-STATE STRUCTURES; BINARY-ALLOYS; NEIGHBOR INTERACTIONS; VARIATION FORMALISM; HEXAGONAL STRUCTURE; FCC LATTICE; ENERGIES AB We present a study of the hexagonal-close-packed Ising model for binary alloys within the cluster-variation approximation. Ground states of order stabilized by interactions that span the next-nearest-neighbor (NNN) distance (octahedron and all of its subclusters) were determined with the cluster-configuration polyhedron method. We predict 32 physically realizable ground states with stoichiometries A, AB, A2B, A3B, A5B, and A4B3. Of these structures, six are stabilized by NN pairs and eight by NNN pairs; the remaining 18 structures require multiplet interactions for their stability. The results in this study are consistent with previous pair-interaction studies. Information concerning ground states and their domains of stability was then used in conjunction with the cluster-variation method (CVM) to calculate the finite-temperature phase equilibria for prototypical binary alloys. We present ordering phase diagrams computed with the CVM that contain all relevant ground states for both isotropic and anisotropic NN pair interactions. The results of the ground-state and CVM calculations are compared with those for ordering on the face-centered-cubic lattice. C1 MIT,DEPT MAT SCI,CAMBRIDGE,MA 02139. LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. RP MCCORMACK, R (reprint author), UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720, USA. NR 57 TC 20 Z9 20 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 10 BP 6767 EP 6780 DI 10.1103/PhysRevB.48.6767 PG 14 WC Physics, Condensed Matter SC Physics GA LY039 UT WOS:A1993LY03900002 ER PT J AU VUL, DA HARMON, BN AF VUL, DA HARMON, BN TI FLUCTUATIONLESS MECHANISM FOR MARTENSITIC TRANSFORMATIONS SO PHYSICAL REVIEW B LA English DT Article ID GROUP-IV METALS; OMEGA-PHASE; PHONON-DISPERSION; BCC PHASE; TRANSITIONS; LATTICE; ALLOYS AB A fluctuationless mechanism for martensitic transformations consisting of the appearance and development of a lattice instability triggered by defects is presented. A number of properties associated with martensitic transformations are qualitatively explained. As a quantitative example, the theory of the displacive beta-omega transformation is constructed. It is argued that this transformation is triggered by interstitial impurities (O,N,C). RP VUL, DA (reprint author), IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES LAB,AMES,IA 50011, USA. NR 28 TC 29 Z9 29 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 10 BP 6880 EP 6883 DI 10.1103/PhysRevB.48.6880 PG 4 WC Physics, Condensed Matter SC Physics GA LY039 UT WOS:A1993LY03900015 ER PT J AU KARPOV, VG GRIMSDITCH, M AF KARPOV, VG GRIMSDITCH, M TI PRESSURE-INDUCED TRANSFORMATIONS IN GLASSES SO PHYSICAL REVIEW B LA English DT Article ID TEMPERATURE THERMAL-EXPANSION; VITREOUS SILICA; AMORPHOUS SIO2 AB The double-well potential model, well known to describe many low-temperature properties of amorphous materials, has been extended to incorporate effects of high pressures. The resulting model not only explains the temperature and time dependences of pressure-induced phenomena but also provides possible explanations for thermal annealing effects as well as irradiation compaction. The results of Brillouin-light-scattering experiments designed to test various predictions of the model are presented: good agreement is obtained. 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 28 TC 43 Z9 44 U1 1 U2 11 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 10 BP 6941 EP 6948 DI 10.1103/PhysRevB.48.6941 PG 8 WC Physics, Condensed Matter SC Physics GA LY039 UT WOS:A1993LY03900025 ER PT J AU BALATSKY, AV BONCA, J AF BALATSKY, AV BONCA, J TI EVEN-FREQUENCY AND ODD-FREQUENCY PAIRING CORRELATIONS IN THE ONE-DIMENSIONAL T-J-H MODEL - A COMPARATIVE-STUDY SO PHYSICAL REVIEW B LA English DT Article ID ANTIFERROMAGNET; EXCITATIONS; INSULATORS; HOLE AB An equal-time version of odd-frequency pairing for a generalized t-J model is introduced. It is shown that the composite operators describing binding of Cooper pairs with magnetization fluctuations naturally appear in this approach. The pairing correlations in both BCS and odd-frequency channels are investigated exactly in one-dimensional systems with up to 16 sites. Our results indicate that at some range of parameters odd-frequency correlations become comparable but smaller than BCS pairing correlations. It is speculated that the spin and density fluctuations in the frustrated model lead to the enhancement of the odd gap susceptibilities. C1 LANDAU THEORET PHYS INST, MOSCOW, RUSSIA. LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, DIV THEORET, LOS ALAMOS, NM 87545 USA. UNIV LJUBLJANA, J STEFAN INST, 61111 LJUBLJANA, SLOVENIA. ASPEN CTR PHYS, ASPEN, CO USA. RP BALATSKY, AV (reprint author), LOS ALAMOS NATL LAB, CTR MAT SCI, LOS ALAMOS, NM 87545 USA. NR 20 TC 17 Z9 17 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 10 BP 7445 EP 7449 DI 10.1103/PhysRevB.48.7445 PG 5 WC Physics, Condensed Matter SC Physics GA LY039 UT WOS:A1993LY03900074 ER PT J AU ROUTBORT, JL ROTHMAN, SJ MUNDY, JN BAKER, JE DABROWSKI, B WILLIAMS, RK AF ROUTBORT, JL ROTHMAN, SJ MUNDY, JN BAKER, JE DABROWSKI, B WILLIAMS, RK TI OXYGEN TRACER DIFFUSION IN YBA2CU4O8 SO PHYSICAL REVIEW B LA English DT Article ID YBA2CU3O7-DELTA; ANISOTROPY AB Oxygen tracer diffusion has been measured in YBa2Cu4O8 (Y 1:2:4) polycrystals over a temperature range of 400 to 700-degrees-C in oxygen partial pressures (P(O2)) that varied between 10(3) and 10(5) Pa. Depth profiles were determined by secondary-ion mass spectrometry. The results can be described by an Arrhenius relationship with a pre-exponential of 0.08 cm2/s and an activation energy of 201 kJ/mole. The diffusion coefficient is a strong function of P(O2), increasing as P(O2) decreases. Oxygen diffuses several orders of magnitude more slowly in Y 1:2:4 than in YBa2Cu3O7-delta Y 1:2:3 with a higher pre-exponential and higher activation energy, and the clear dependence on P(O2) indicates that diffusion of oxygen in polycrystalline Y 1:2:4 occurs by a different mechanism than in Y 1:2:3. The results of tracer measurements performed at 600 and 700-degrees-C on Y 1:2:4 c-axis single crystals indicate that diffusion in the c direction is at least 100 times slower than diffusion in the polycrystals and has a larger activation energy. C1 UNIV ILLINOIS,MAT RES LAB,URBANA,IL 61801. OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831. NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115. RP ROUTBORT, JL (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 19 TC 18 Z9 18 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 10 BP 7505 EP 7512 DI 10.1103/PhysRevB.48.7505 PG 8 WC Physics, Condensed Matter SC Physics GA LY039 UT WOS:A1993LY03900081 ER PT J AU LAGUNA, MA SANJUAN, ML BUTERA, A TOVAR, M FISK, Z CANFIELD, PC AF LAGUNA, MA SANJUAN, ML BUTERA, A TOVAR, M FISK, Z CANFIELD, PC TI RAMAN-STUDY OF T'-PHASE DISTORTION IN R2CUO4 COMPOUNDS (R = ND,SM,EU,GD) SO PHYSICAL REVIEW B LA English DT Article ID WEAK-FERROMAGNETISM; CUPRATE SUPERCONDUCTORS; MAGNETIC-PROPERTIES; GD2CUO4 CRYSTALS; SINGLE-CRYSTAL; HIGH-PRESSURE; LA2CUO4; BEHAVIOR; ND2CUO4; PHONON AB We present a Raman study of the appearance of structural distortions in T'-phase cuprates R2-xCexCuO4 (R=Sm,Eu,Gd) upon R atomic number increase. Besides some anomalies in the frequencies of the allowed modes, the distortion from the T' phase is evidenced in Gd2CuO4 by the appearance of an additional mode with B1g symmetry, B1g*, that we assign to the motion of the in-plane oxygen atoms, O(1). This mode, which appears incipiently in Eu2CuO4 and SmGdCuO4, is formally forbidden by symmetry, and would be activated by O(1) displacement resulting in a distorted CuO2 plane. This interpretation is in agreement with previous experimental results either of structural or magnetic type. The appearance of weak ferromagnetism for R = Gd and beyond, for instance, is incompatible with perfect T'-phase structure. We compare the results in pure compounds with those that are Ce doped and show that the B1g* activity decreases with respect to that of the B1g mode as increasing amounts of Ce are introduced in the lattice; this is interpreted as a consequence of T'-phase stabilization upon doping. Temperature-dependence spectra are also presented and discussed. C1 CTR ATOM BARILOCHE, RA-8400 BARILOCHE, RN, ARGENTINA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. INST BALSEIRO, RA-8400 BARILOCHE, RN, ARGENTINA. RP LAGUNA, MA (reprint author), UNIV ZARAGOZA, CSIC, FAC CIENCIAS, INST CIENCIA MAT ARAGON, E-50009 ZARAGOZA, SPAIN. RI Canfield, Paul/H-2698-2014; Sanjuan, Maria Luisa/E-9324-2016 OI Sanjuan, Maria Luisa/0000-0002-5793-2058 NR 28 TC 23 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 SEP 1 PY 1993 VL 48 IS 10 BP 7565 EP 7569 DI 10.1103/PhysRevB.48.7565 PG 5 WC Physics, Condensed Matter SC Physics GA LY039 UT WOS:A1993LY03900088 ER PT J AU LEWIS, JA PLATT, CE WEGMANN, M TEEPE, M WAGNER, JL HINKS, DG AF LEWIS, JA PLATT, CE WEGMANN, M TEEPE, M WAGNER, JL HINKS, DG TI SUPERCONDUCTING PROPERTIES OF GRAIN-ALIGNED HGBA2CUO4+X SO PHYSICAL REVIEW B LA English DT Note ID TEMPERATURE AB HgBa2CuO4+x(Hg 1:2:0:1) particles (15 wt%) were aligned in an applied magnetic field of 70 kG at room temperature in an epoxy resin. Magnetization hysteresis loops were measured from 0 to 10 kG at 20 K for samples oriented with their c axis either parallel or perpendicular to the applied field. The degree of anisotropy, characterized by the ratio of DELTAM (H parallel-to c axis) to DELTAM (H perpendicular-to c axis), was found to be field dependent. A maximum value of 4.53 was observed at 0.5 kG; however, the anisotropy decreased dramatically with increasing field and was isotropic above 3 kG. This behavior differs significantly from grain-aligned YBa2Cu3O7-x, where the anisotropy is independent of applied field, and may indicate that flux pinning is more isotropic in Hg 1:2:0:1. The critical current density J(c) was estimated by the Bean model to be approximately 7 X 10(4) A/cm2 at 8 kG, 20 K and was independent of Hg 1:2:0:1 sample orientation. C1 UNIV ILLINOIS,DEPT MAT SCI & ENGN,URBANA,IL 61801. ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. RP LEWIS, JA (reprint author), SCI & TECHNOL CTR SUPERCONDUCT,URBANA,IL 61801, USA. NR 9 TC 18 Z9 18 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0163-1829 J9 PHYS REV B JI Phys. Rev. B PD SEP 1 PY 1993 VL 48 IS 10 BP 7739 EP 7741 DI 10.1103/PhysRevB.48.7739 PG 3 WC Physics, Condensed Matter SC Physics GA LY039 UT WOS:A1993LY03900119 ER PT J AU JUNGCLAUS, A BELGYA, T DIPRETE, DP VILLANI, M JOHNSON, EL BAUM, EM MCGRATH, CA YATES, SW ZAMFIR, NV AF JUNGCLAUS, A BELGYA, T DIPRETE, DP VILLANI, M JOHNSON, EL BAUM, EM MCGRATH, CA YATES, SW ZAMFIR, NV TI LIFETIMES AND ELECTROMAGNETIC DECAY PROPERTIES OF NEGATIVE-PARITY STATES IN SM-150, SM-152, SM-154 FROM (N,N'GAMMA) MEASUREMENTS SO PHYSICAL REVIEW C LA English DT Article ID INTERACTING BOSON MODEL; LEVEL DENSITIES; TRANSITION AB The Doppler shifts of gamma rays following the decay of the 1(1)- and 3(1)- states in Sm-150, Sm-152, Sm-154 excited by inelastic scattering of 1.3 MeV neutrons from natural Sm2O3 have been measured. With the Winterbon theory to describe the slowing down process of the recoiling atoms in the bulk of the target material, nuclear lifetimes could be extracted from these data. These measured lifetimes are compared to the results of a recent investigation with the gamma-ray induced Doppler (GRID) broadening technique and have been used to clarify problems associated with the incomplete knowledge of the feeding pattern in heavy nuclei inherent in the GRID method. The large E1 transition rates in Sm-152 obtained in the previous study are confirmed; the B(E1) systematics has been extended to Sm-154 and is interpreted within the framework of the interacting boson model. C1 UNIV GOTTINGEN,INST PHYS 2,W-3400 GOTTINGEN,GERMANY. HUNGARIAN ACAD SCI,H-1525 BUDAPEST,HUNGARY. BROOKHAVEN NATL LAB,UPTON,NY 11973. CLARK UNIV,WORCESTER,MA 01610. INST ATOM PHYS,BUCHAREST,ROMANIA. RP JUNGCLAUS, A (reprint author), INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE,FRANCE. RI Zamfir, Nicolae Victor/F-2544-2011; McGrath, Christopher/E-8995-2013 NR 12 TC 17 Z9 17 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1005 EP 1009 DI 10.1103/PhysRevC.48.1005 PG 5 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600009 ER PT J AU PITTEL, S FEDERMAN, P PERIS, GEA CASTEN, RF CHOU, WT AF PITTEL, S FEDERMAN, P PERIS, GEA CASTEN, RF CHOU, WT TI SEMIEMPIRICAL DETERMINATION OF EFFECTIVE P-N MONOPOLE MATRIX-ELEMENTS SO PHYSICAL REVIEW C LA English DT Article ID NUCLEI; MASSES; STATES; MODEL AB A method for extracting effective p-n monopole matrix elements from experimental data is developed and applied to nuclei just below Pb-208. Eight effective monopole matrix elements are extracted from a fit to 38 experimental data with an overall rms deviation of 116 keV. The resulting matrix elements are compared with those from semirealistic effective interactions. C1 UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,RA-1428 BUENOS AIRES,ARGENTINA. BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. CLARK UNIV,DEPT CHEM,WORCESTER,MA 01610. RP PITTEL, S (reprint author), UNIV DELAWARE,BARTOL RES INST,NEWARK,DE 19716, USA. NR 19 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1050 EP 1055 DI 10.1103/PhysRevC.48.1050 PG 6 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600014 ER PT J AU BAKER, FT BEATTY, D BIMBOT, L CUPPS V DJALALI, C FERGERSON, RW GLASHAUSSER, C GRAW, G GREEN, A JONES, K MORLET, M NANDA, SK SETHI, A STORM, BH UNKELBACH, W WILLIS, A AF BAKER, FT BEATTY, D BIMBOT, L CUPPS, V DJALALI, C FERGERSON, RW GLASHAUSSER, C GRAW, G GREEN, A JONES, K MORLET, M NANDA, SK SETHI, A STORM, BH UNKELBACH, W WILLIS, A TI SEPARATION OF DELTA-S=0 AND DELTA-S=1 IN THE RESPONSE OF C-12 TO 318 MEV PROTONS SO PHYSICAL REVIEW C LA English DT Article ID NUCLEAR-SPIN RESPONSE; INTERMEDIATE ENERGIES; CA-40; POLARIZATION; EXCITATION; RESONANCES; SCATTERING; STRENGTH; DIPOLE AB Angular distributions of the double-differential cross section d2sigma/dOMEGA dE (sigma) and the spin-flip probability S(nn) have been measured for inclusive inelastic proton scattering from C-12 at E(p) = 318 MeV. Data have been obtained over an excitation energy range 9 MeV less-than-or-equal-to E(x) less-than-or-equal-to 42 MeV for laboratory scattering angles of 3-degrees, 5-degrees, 7-degrees, 9-degrees, 12-degrees, 15-degrees, and 18-degrees. Multipole decompositions of angular distributions of both the spin-flip cross section sigma(SF) = sigmaS(nn) and the estimated cross section for DELTAS = 0 transitions have been performed. The distribution of deduced DELTAL = 1, DELTAS = 0 (the giant-dipole resonance) strength peaks near E(x) = 22 MeV; although there is apparently much more strength relative to the energy-weighted sum rule (EWSR) than expected, this appears to be an artifact of instrumental background at small angles. Approximately 55% of the EWSR for DELTAL = 2, DELTAS = 0 was observed spread uniformly across the spectrum with no evidence for a giant-quadrupole resonance. Angular distributions for sigma(SF) were analyzed using the predictions from random-phase approximation calculations for the nuclear structure and distorted-wave impulse approximation calculations for the scattering. These predictions are found to provide a good description of the sigma(SF) data above E(x) = 25 MeV; values of S(nn) are predicted somewhat too low in this region. C1 UNIV MINNESOTA, MINNEAPOLIS, MN 55455 USA. FORSCHUNGSZENTRUM JULICH, W-5170 JULICH 1, GERMANY. INDIANA UNIV, BLOOMINGTON, IN 47405 USA. UNIV MUNICH, SEKT PHYS, W-8046 GARCHING, GERMANY. CEBAF, NEWPORT NEWS, VA 23606 USA. RUTGERS UNIV, PISCATAWAY, NJ 08854 USA. INST PHYS NUCL LYON, F-91406 ORSAY, FRANCE. UNIV S CAROLINA, COLUMBIA, SC 29208 USA. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA. RP BAKER, FT (reprint author), UNIV GEORGIA, ATHENS, GA 30602 USA. NR 24 TC 18 Z9 18 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1106 EP 1115 DI 10.1103/PhysRevC.48.1106 PG 10 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600021 ER PT J AU BOWMAN, JD DELHEIJ, PPJ FRANKLE, CM GOULD, CR HAASE, DG KNUDSON, JN MITCHELL, GE PENTTILA, S POSTMA, H ROBERSON, NR SEESTROM, SJ SZYMANSKI, JJ YEH, JJ YOO, SH YUAN, VW ZHU, X AF BOWMAN, JD DELHEIJ, PPJ FRANKLE, CM GOULD, CR HAASE, DG KNUDSON, JN MITCHELL, GE PENTTILA, S POSTMA, H ROBERSON, NR SEESTROM, SJ SZYMANSKI, JJ YEH, JJ YOO, SH YUAN, VW ZHU, X TI EXPERIMENTAL LIMIT ON PARITY VIOLATION IN NONRESONANT NEUTRON-NUCLEUS SCATTERING SO PHYSICAL REVIEW C LA English DT Article ID RESONANCES; NONCONSERVATION; CAPTURE; TH-232; STATES; U-238 AB The parity-nonconserving longitudinal asymmetry P has been measured in nonresonant regions in Th-232 for neutron energies in the range 6-86 eV. The measured value of P(nonres)=(9.8+/-21.7) X 10(-6) is consistent with statistical descriptions of parity violation. C1 TRIUMF,VANCOUVER V6T 2A3,BC,CANADA. N CAROLINA STATE UNIV,RALEIGH,NC 27695. TRIANGLE UNIV,NUCL LAB,DURHAM,NC 27708. UNIV TECHNOL,2600 GA DELFT,NETHERLANDS. DUKE UNIV,DURHAM,NC 27706. RP BOWMAN, JD (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. RI Gould, Christopher/M-7676-2013 NR 20 TC 8 Z9 8 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1116 EP 1119 DI 10.1103/PhysRevC.48.1116 PG 4 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600022 ER PT J AU MACKLIN, RL HILL, NW HARVEY, JA TWEED, GL AF MACKLIN, RL HILL, NW HARVEY, JA TWEED, GL TI NEUTRON-CAPTURE AND TOTAL CROSS-SECTIONS OF SM-144 SO PHYSICAL REVIEW C LA English DT Article AB Neutron capture and transmission measurements have been made from 0.5 eV to 500 keV and have been analyzed to give parameters of resonances up to approximately 100 keV. The average resonance spacing for s-wave resonances was determined to be 670+/-60 eV and the s-wave strength function (3.6+/-0.8) X 10(-4). The average radiation width for s-wave resonances was 74+/-5 meV and that for p-wave resonances somewhat larger approximately 89 meV. The Maxwellian average capture cross section at a stellar temperature of 30 keV was 92+/-6 mb. The capture resonance integral of 1.7+/-0.1 b calculated from the resonance parameters and the thermal cross section is smaller than the recently measured value of 2.38+/-0.17 b. C1 OAK RIDGE NATL LAB,BLDG 6010,MS-6356,POB 2008,OAK RIDGE,TN 37831. NR 19 TC 5 Z9 5 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1120 EP 1127 DI 10.1103/PhysRevC.48.1120 PG 8 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600023 ER PT J AU BRANDAN, ME ALFARO, JR MENCHACAROCHA, A DELCAMPO, JG SATCHLER, GR STELSON, PH KIM, HJ SHAPIRA, D AF BRANDAN, ME ALFARO, JR MENCHACAROCHA, A DELCAMPO, JG SATCHLER, GR STELSON, PH KIM, HJ SHAPIRA, D TI ELASTIC-SCATTERING OF NI-58+AL-27 AT NEAR-BARRIER ENERGIES SO PHYSICAL REVIEW C LA English DT Article ID FUSION CROSS-SECTIONS; HEAVY-ION SCATTERING; COULOMB BARRIER; S-32+NI-58,NI-64 SYSTEMS; DEPENDENCE; POTENTIALS; SI-28 AB The elastic angular distributions for Ni-58+Al-27 have been measured at five energies from E(c.m.)=48.8 to 69.5 MeV. The optical model analysis assumes both phenomenological and folding model potentials. Regions of sensitivity, where the potential is well determined, are found to be different for the real and the imaginary parts, and to vary with energy. The values of the real potential in the surface are weakly dependent on energy. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. RP BRANDAN, ME (reprint author), UNIV NACL AUTONOMA MEXICO,INST FIS,AP 20-364,MEXICO CITY 01000,DF,MEXICO. RI Brandan, Maria-Ester/K-9014-2012 OI Brandan, Maria-Ester/0000-0002-1165-3440 NR 19 TC 21 Z9 21 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1147 EP 1151 DI 10.1103/PhysRevC.48.1147 PG 5 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600025 ER PT J AU BIRO, TS VANDOORN, E MULLER, B THOMA, MH WANG, XN AF BIRO, TS VANDOORN, E MULLER, B THOMA, MH WANG, XN TI PARTON EQUILIBRATION IN RELATIVISTIC HEAVY-ION COLLISIONS SO PHYSICAL REVIEW C LA English DT Article ID QUARK-GLUON PLASMA; NUCLEUS-NUCLEUS COLLISIONS; ENERGY-LOSS; TRANSPORT-COEFFICIENTS; PARTICLE-PRODUCTION; GAUGE-THEORIES; MODEL; THERMALIZATION; QCD; TEMPERATURE AB We investigate the processes leading to phase-space equilibration of parton distributions in nuclear interactions at collider energies. We derive a set of rate equations describing the chemical equilibration of gluons and quarks including medium effects on the relevant QCD transport coefficients, and discuss their consequences for parton equilibration in heavy ion collisions. C1 UNIV GIESSEN, INST THEORET PHYS, D-35392 GIESSEN, GERMANY. LAWRENCE BERKELEY LAB, DIV NUCL SCI, BERKELEY, CA 94720 USA. RP DUKE UNIV, DEPT PHYS, DURHAM, NC 27708 USA. RI Biro, Tamas/A-9641-2012; OI Biro, Tamas/0000-0001-6188-8478; Wang, Xin-Nian/0000-0002-9734-9967 NR 55 TC 249 Z9 251 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1275 EP 1284 DI 10.1103/PhysRevC.48.1275 PG 10 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600037 ER PT J AU BENESH, CJ FRIAR, JL AF BENESH, CJ FRIAR, JL TI ELECTROMAGNETIC DISSOCIATION OF NUCLEI IN HEAVY-ION COLLISIONS SO PHYSICAL REVIEW C LA English DT Article ID AU-197 TARGETS; ENERGIES; CO-59 AB Large discrepancies have been observed between measured electromagnetic dissociation (ED) cross sections and the predictions of the semiclassical Weizacker-Williams-Fermi (WWF) method. In this paper, the validity of the semiclassical approximation is examined. The total cross section for electromagnetic excitation of a nuclear target by a spinless projectile is calculated in first Born approximation, neglecting recoil. The final result is expressed in terms of correlation functions and convoluted densities in configuration space. The result agrees with the WWF approximation to leading order (unretarded electric dipole approximation), but the method allows an analytic evaluation of the cutoff, which is determined by the details of the electric dipole transition charge density. Using the Goldhaber-Teller model of that density, and uniform charge densities for both projectile and target, the cutoff is determined for the total cross section in the nonrelativistic limit, and found to be smaller than values currently used for ED calculations. In addition, cross sections are calculated using a phenomenological momentum space cutoff designed to model final state interactions. For moderate projectile energies, the calculated ED cross section is found to be smaller than the semiclassical result, in qualitative agreement with experiment. C1 UNIV MAINZ,INST KERNPHYS,W-6500 MAINZ,GERMANY. RP BENESH, CJ (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 30 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1285 EP 1296 DI 10.1103/PhysRevC.48.1285 PG 12 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600038 ER PT J AU OBERACKER, VE UMAR, AS WELLS, JC BOTTCHER, C STRAYER, MR MARUHN, JA AF OBERACKER, VE UMAR, AS WELLS, JC BOTTCHER, C STRAYER, MR MARUHN, JA TI MUON-INDUCED FISSION - A PROBE FOR NUCLEAR DISSIPATION AND FISSION DYNAMICS SO PHYSICAL REVIEW C LA English DT Article ID NEUTRON EMISSION; PROBABILITIES; CAPTURE; ATOMS; U-238; MODEL AB Excited muonic atoms in the actinide region may induce prompt fission. Following atomic muon capture, some of the inner-shell transitions proceed by inverse internal conversion, i.e., the excitation energy of the muonic atom is transferred to the nucleus. In particular, the (E2 : 3d --> 1s) muonic transition energy is close to the peak of the isoscalar giant quadrupole resonance in actinide nuclei which exhibits a large fission width. Prompt fission in the presence of a bound muon allows us to study the dynamics of large-amplitude collective motion. We solve the time-dependent Dirac equation for the muonic spinor wave function in the Coulomb field of the fissioning nucleus on a three-dimensional lattice and demonstrate that the muon attachment probability to the light fission fragment is a measure of the nuclear energy dissipation between the outer fission barrier and the scission point. C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831. UNIV FRANKFURT,INST THEORET PHYS,W-6000 FRANKFURT,GERMANY. VANDERBILT UNIV,DEPT PHYS & ASTRON,NASHVILLE,TN 37235. RP OBERACKER, VE (reprint author), OAK RIDGE NATL LAB,CTR COMPUTAT INTENS PHYS,OAK RIDGE,TN 37831, USA. RI Umar, Ahmet/J-4125-2013; Wells, Jack/D-3675-2016 OI Umar, Ahmet/0000-0002-9267-5253; Wells, Jack/0000-0002-5083-3030 NR 51 TC 3 Z9 3 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1297 EP 1306 DI 10.1103/PhysRevC.48.1297 PG 10 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600039 ER PT J AU BENESH, CJ GOLDMAN, T STEPHENSON, GJ AF BENESH, CJ GOLDMAN, T STEPHENSON, GJ TI COLOR MAGNETIC CORRECTIONS TO QUARK-MODEL VALENCE DISTRIBUTIONS SO PHYSICAL REVIEW C LA English DT Article ID BAG-MODEL; STATES AB We calculate order-alpha(s) color magnetic corrections to the valence quark distributions of the proton using the Los Alamos potential model wave functions, The spin-spin interaction breaks the model SU(4) symmetry, providing a natural mechanism for the difference between the up and down distributions. For a value of alpha(s) sufficient to produce the N-DELTA mass splitting, we find up and down quark distributions in reasonable agreement with experiment. RP BENESH, CJ (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 18 TC 9 Z9 9 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1379 EP 1387 DI 10.1103/PhysRevC.48.1379 PG 9 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600047 ER PT J AU BEATTY, DP BURLESON, GR RAWOOLSULLIVAN, M ELGHOSSAIN, M FORTUNE, HT WILLIAMS, AL SMITH, DA MORRIS, CL GARNETT, R WATSON, DL JOHNSON, J WARD, H WHITLEY, C MATTHEWS, SK PALARCZYK, M EDWARDS, C ESPY, M HASHIMOTO, O TOMOYUKI, H AF BEATTY, DP BURLESON, GR RAWOOLSULLIVAN, M ELGHOSSAIN, M FORTUNE, HT WILLIAMS, AL SMITH, DA MORRIS, CL GARNETT, R WATSON, DL JOHNSON, J WARD, H WHITLEY, C MATTHEWS, SK PALARCZYK, M EDWARDS, C ESPY, M HASHIMOTO, O TOMOYUKI, H TI PION DOUBLE-CHARGE-EXCHANGE ON O-16 AT T-PI = 300-500 MEV SO PHYSICAL REVIEW C LA English DT Note ID DEPENDENCE; RESONANCE AB Measurements of small-angle cross sections for the pion double-charge-exchange (DCX) reaction O-16(pi+,pi-)Ne-16(g.s.) at incident energies of 300-500 MeV are reported. These are the first measurements of DCX cross sections on a T = 0 nucleus in this energy region. The behavior of the cross sections is similar to that of analog transitions, but they are smaller by more than an order of magnitude. This suggests sequential charge-exchange scattering as the dominant process, but suppressed by a mechanism not yet identified. C1 NEW MEXICO STATE UNIV,LAS CRUCES,NM 88003. UNIV PENN,PHILADELPHIA,PA 19104. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. UNIV YORK,YORK YO1 5DD,N YORKSHIRE,ENGLAND. UNIV TEXAS,AUSTIN,TX 78712. GEORGE WASHINGTON UNIV,WASHINGTON,DC 20052. UNIV MINNESOTA,MINNEAPOLIS,MN 55455. NATL LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN. RP BEATTY, DP (reprint author), RUTGERS UNIV,DEPT PHYS,PISCATAWAY,NJ 08855, USA. NR 17 TC 5 Z9 5 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1428 EP 1430 DI 10.1103/PhysRevC.48.1428 PG 3 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600052 ER PT J AU GINOCCHIO, JN AF GINOCCHIO, JN TI TEST OF GENERALIZED SENIORITY WITH PION DOUBLE-CHARGE-EXCHANGE ON THE NICKEL ISOTOPES SO PHYSICAL REVIEW C LA English DT Note AB Recent experimental double charge exchange cross sections to the double analog state and the ground state are compared to predictions of the generalized seniority model. RP GINOCCHIO, JN (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 8 TC 8 Z9 8 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP 1460 EP 1462 DI 10.1103/PhysRevC.48.1460 PG 3 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600061 ER PT J AU TOTH, KS NAZAREWICZ, W AF TOTH, KS NAZAREWICZ, W TI SPIN ASSIGNMENTS FOR THE GROUND-STATES OF LU-155 AND LU-157 SO PHYSICAL REVIEW C LA English DT Note ID SINGLE-PARTICLE STATES; EXCITATION-ENERGIES; ALPHA-DECAY; NUCLEI; ISOMERS; TM-153; MODEL; S1/2 AB The alpha-decay properties of 155Lu and 157Lu show that their ground states are not pih11/2 (as they are in 153,155Tm, and 151,153Ho) but either pid3/2 or pis1/2. From single-particle level systematics the pid3/2 assignment is favored. Calculations using the shell correction method predict the one-quasiparticle proton states based on the h11/2, d3/2, and s1/2 subshells to appear very close in energy in Lu, Ta, and Re nuclei with N is similar to 84, independently of equilibrium deformation. C1 UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996. RP TOTH, KS (reprint author), OAK RIDGE NATL LAB,JOINT INST HEAVY ION RES,OAK RIDGE,TN 37831, USA. NR 19 TC 8 Z9 8 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD SEP PY 1993 VL 48 IS 3 BP R978 EP R980 DI 10.1103/PhysRevC.48.R978 PG 3 WC Physics, Nuclear SC Physics GA LY416 UT WOS:A1993LY41600006 ER PT J AU ALEXOPOULOS, T ALLEN, C ANDERSON, EW BALAMURALI, V BANERJEE, S BEERY, PD BHAT, P BISHOP, JM BISWAS, NN BUJAK, A CARMONY, DD CARTER, T CHOI, Y COLE, P DEBONTE, R DECARLO, V ERWIN, AR FINDEISEN, C GOSHAW, AT GUTAY, LJ HIRSCH, AS HOJVAT, C JENNINGS, JR KENNEY, VP LINDSEY, CS LOOMIS, C LOSECCO, JM MCMAHON, T MCMANUS, AP MORGAN, NK NELSON, K OH, SH PORILE, NT REEVES, D RIMAI, A ROBERTSON, WR SCHARENBERG, RP STAMPKE, SR STRINGFELLOW, BC THOMPSON, MA TURKOT, F WALKER, WD WANG, CH WARCHOL, J WESSON, DK ZHAN, YH AF ALEXOPOULOS, T ALLEN, C ANDERSON, EW BALAMURALI, V BANERJEE, S BEERY, PD BHAT, P BISHOP, JM BISWAS, NN BUJAK, A CARMONY, DD CARTER, T CHOI, Y COLE, P DEBONTE, R DECARLO, V ERWIN, AR FINDEISEN, C GOSHAW, AT GUTAY, LJ HIRSCH, AS HOJVAT, C JENNINGS, JR KENNEY, VP LINDSEY, CS LOOMIS, C LOSECCO, JM MCMAHON, T MCMANUS, AP MORGAN, NK NELSON, K OH, SH PORILE, NT REEVES, D RIMAI, A ROBERTSON, WR SCHARENBERG, RP STAMPKE, SR STRINGFELLOW, BC THOMPSON, MA TURKOT, F WALKER, WD WANG, CH WARCHOL, J WESSON, DK ZHAN, YH TI STUDY OF SOURCE SIZE IN P-(P)OVER-BAR COLLISIONS AT ROOT-S = 1.8 TEV USING PION INTERFEROMETRY SO PHYSICAL REVIEW D LA English DT Article ID BOSE-EINSTEIN CORRELATIONS; ANTIPROTON-PROTON COLLISIONS; INTERSECTING STORAGE-RINGS; SQUARE-ROOT-S=1.8 TEV; TEVATRON COLLIDER; DEPENDENCE; EVENTS AB Experiment E735 collected data for approximately 10(7) interactions at the CO intersection of the Fermilab ppBAR collider with square-root sBAR = 1. 8 TeV. The Bose-Einstein correlations between pairs of identical pions were measured in a limited aperture spectrometer and used to estimate the size and lifetime of the source. The aperture shape limited the sensitivity primarily to the source dimension R along the incident ppBAR direction. Both this dimension and the lifetime appear to depend strongly on pion multiplicity. Efforts were also made to obtain some information on the transverse source size, energy density, and the dependence of source size and strength on dipion momentum. Fits to the entire data sample yielded a value R = 1.06+/-0.07 fm for the average source dimension and a value tau = 0.74+/-0.06 fm for the average source lifetime with [dN(c)/deta] = 14.4. C1 DUKE UNIV,DEPT PHYS,DURHAM,NC 27706. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. UNIV NOTRE DAME,DEPT PHYS,NOTRE DAME,IN 46556. PURDUE UNIV,DEPT PHYS & CHEM,W LAFAYETTE,IN 47907. UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706. RP ALEXOPOULOS, T (reprint author), DEPAUW UNIV,DEPT PHYS,GREENCASTLE,IN 46135, USA. NR 39 TC 44 Z9 44 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 1931 EP 1942 DI 10.1103/PhysRevD.48.1931 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100011 ER PT J AU NI, B ARNOLD, KP CHMELY, F COOPER, MD ECKHAUSE, M GUSS, PP HOFFMAN, CM HOGAN, GE HUGHES, VW KANE, JR KETTELL, SH KUANG, Y MARKEY, J MATTHIAS, BE MISCHKE, RE ORTH, H PJILONEN, LE PUTLITZ, GZ REIDY, J SCHAEFER, HR WILLIAMS, RA WOODLE, KA AF NI, B ARNOLD, KP CHMELY, F COOPER, MD ECKHAUSE, M GUSS, PP HOFFMAN, CM HOGAN, GE HUGHES, VW KANE, JR KETTELL, SH KUANG, Y MARKEY, J MATTHIAS, BE MISCHKE, RE ORTH, H PJILONEN, LE PUTLITZ, GZ REIDY, J SCHAEFER, HR WILLIAMS, RA WOODLE, KA TI SEARCH FOR SPONTANEOUS CONVERSION OF MUONIUM TO ANTIMUONIUM SO PHYSICAL REVIEW D LA English DT Article ID LAMB SHIFT; LEPTON NUMBER; SILICA-POWDER; VACUUM; STATE; VIOLATION; FRACTIONS AB An experimental search for the spontaneous conversion of muonium to antimuonium is described. A 10 MeV/c mu+ beam of average intensity 3 X 10(5) s-1 was used to produce muonium atoms in vacuum by charge capture in a thin foil. The novel method applied here for detection of an antimuonium atom was a triple coincidence of two muonic x-ray photons from the atomic capture of its mu- by a high-Z target and a secondary electron ejected from the target upon the impact of the antimuonium atom. No antimuonium events were observed and the resulting 90% confidence level upper limit on the coupling constant leading to the conversion, G(MMBAR), is 6.9G(F), where G(F) is the Fermi coupling constant. C1 YALE UNIV,NEW HAVEN,CT 06511. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. COLL WILLIAM & MARY,WILLIAMSBURG,VA 23185. UNIV HEIDELBERG,W-6900 HEIDELBERG,GERMANY. UNIV MISSISSIPPI,UNIVERSITY,MS 38677. NR 55 TC 6 Z9 6 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 1976 EP 1989 DI 10.1103/PhysRevD.48.1976 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100014 ER PT J AU TANG, WK AF TANG, WK TI HIGH-ENERGY QUARK-ANTIQUARK ELASTIC-SCATTERING WITH MESONIC EXCHANGE SO PHYSICAL REVIEW D LA English DT Article ID SMALL-X; QCD; ASYMPTOTICS; AMPLITUDES; BEHAVIOR; HERA AB We study the high-energy elastic scattering of a quark-antiquark pair with an exchange of a mesonic state in the t channel with -t/LAMBDA2 much greater than 1. Both the normalization factor and the Regge trajectory can be calculated in perturbative QCD in the cases of a fixed (nonrunning) and running coupling constant. The dependence of the Regge trajectory on the coupling constant is highly nonlinear and the trajectory is of the order of 0.2 in the interesting physical range. RP TANG, WK (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 16 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 2019 EP 2026 DI 10.1103/PhysRevD.48.2019 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100018 ER PT J AU STANGE, A WILLENBROCK, S AF STANGE, A WILLENBROCK, S TI YUKAWA CORRECTION TO TOP-QUARK PRODUCTION AT THE FERMILAB TEVATRON SO PHYSICAL REVIEW D LA English DT Article ID W-GLUON FUSION; HIGGS-BOSON; PPBAR COLLISIONS; NEUTRAL CURRENTS; WEINBERG MODEL; HEAVY QUARKS; B-DECAYS; QCD; ANNIHILATION; THRESHOLD AB We calculate the correction to qqBAR --> ttBAR of order g2m(t)2/M(W)2. This correction, proportional to the square of the Higgs-boson Yukawa coupling to the top quark, arises from loops of Higgs bosons and the scalar component of virtual vector bosons. The Yukawa correction to the total ttBAR production cross section at the Fermilab Tevatron in the standard Higgs model is found to be much less than the theoretical uncertainty in the cross section. However, in a two-Higgs-doublet model, Yukawa couplings are generally enhanced. The Yukawa correction can increase the total ttBAR production cross section in this model by as much as 20-35 %, which is potentially observable at the Tevatron. C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP STANGE, A (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA. NR 42 TC 30 Z9 30 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 2054 EP 2061 DI 10.1103/PhysRevD.48.2054 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100022 ER PT J AU LEVIN, E AF LEVIN, E TI RAPIDITY GAPS IN DEEP-INELASTIC SCATTERING SO PHYSICAL REVIEW D LA English DT Article ID ENERGY HADRON-COLLISIONS; HEAVY FLAVOR PRODUCTION; SMALL-X; QUARK PRODUCTION; FACTORIZATION; QCD; NUCLEON AB A theoretical approach is developed to large rapidity gap physics in deep inelastic scattering. The formula for the survival probability of the large rapidity gap is obtained, which turns out to be quite different from Bjorken's formula for hadron-hadron collisions. RP LEVIN, E (reprint author), FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA. NR 33 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 2097 EP 2104 DI 10.1103/PhysRevD.48.2097 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100026 ER PT J AU SNYDER, AE QUINN, HR AF SNYDER, AE QUINN, HR TI MEASURING CP ASYMMETRY IN B-]RHO-PI-DECAYS WITHOUT AMBIGUITIES SO PHYSICAL REVIEW D LA English DT Article ID ISOSPIN ANALYSIS; B-DECAYS AB We reexamine the question of isospin analysis applied to the rhopi decay modes of the B as a tool to extract the CKM angle between V(ub)*V(ud) and V(tb)*V(td), without ambiguities or uncertainties due to penguin amplitude contributions. We find that a maximum-likelihood fit of the parameters to the full Dalitz plot distribution can successfully extract the parameters-perhaps with as few as 1000 events. This result is from a study of Monte Carlo-generated events without inclusion of detector efficiency or background effects. The interference between channels is a large effect and provides additional constraints on the parameters compared to channel-by-channel studies. These can usually lift the degeneracy between the multiple solutions that plague such studies. The inclusion of charged B decays in the analysis would provide a direct check of the standard model prediction that the penguin amplitude weak phase for this channel is canceled by the weak mixing phase. RP SNYDER, AE (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 6 TC 213 Z9 214 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 2139 EP 2144 DI 10.1103/PhysRevD.48.2139 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100031 ER PT J AU DINE, M LEIGH, RG KAGAN, A AF DINE, M LEIGH, RG KAGAN, A TI SUPERSYMMETRY AND THE NELSON-BARR MECHANISM SO PHYSICAL REVIEW D LA English DT Article ID STRONG CP PROBLEM; INVISIBLE AXION; VIOLATION; MODEL; MASS; CONSERVATION; SUPERSTRINGS; SUPERGRAVITY; CONSTRAINTS; INSTANTONS AB One possible solution to the strong CP problem is that CP is an exact symmetry, spontaneously broken at some scale. Some years ago, Nelson and Barr suggested a mechanism for obtaining theta = 0 at the tree level in this framework and showed that radiative corrections were small in some nonsupersymmetric models. Further investigations suggested that the same could be true in supersymmetric theories. In this paper we show that such solutions assume extraordinarily high degrees of degeneracy among squark masses and among other supersymmetry-breaking parameters. We argue, using naturalness as well as expectations from string theory, that this is not very plausible. C1 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. RP DINE, M (reprint author), UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064, USA. NR 38 TC 35 Z9 35 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 2214 EP 2223 DI 10.1103/PhysRevD.48.2214 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100038 ER PT J AU LEPAGE, GP MACKENZIE, PB AF LEPAGE, GP MACKENZIE, PB TI VIABILITY OF LATTICE PERTURBATION-THEORY SO PHYSICAL REVIEW D LA English DT Article ID 4-FERMION OPERATORS; LAMBDA-PARAMETERS; CONTINUUM-LIMIT; WILSON LOOPS; GAUGE-THEORY; QCD; CONNECTION; SPECTRUM AB In this paper we show that the apparent failure of QCD lattice perturbation theory to account for Monte Carlo measurements of perturbative quantities results from choosing the bare lattice coupling constant as the expansion parameter. Using instead ''renormalized'' coupling constants defined in terms of physical quantities, such as the heavy-quark potential, greatly enhances the predictive power of lattice perturbation theory. The quality of these predictions is further enhanced by a method for automatically determining the coupling-constant scale most appropriate to a particular quantity. We present a mean-field analysis that explains the large renormalizations relating lattice quantities, such as the coupling constant, to their continuum analogues. This suggests a new prescription for designing lattice operators that are more continuumlike than conventional operators. Finally, we provide evidence that the scaling of physical quantities can be asymptotic or perturbative already at (quenched) beta's as low as 5.7, provided the evolution from scale to scale is analyzed using renormalized perturbation theory. This result indicates that reliable simulations of QCD are possible at these same low beta's. C1 FERMILAB NATL ACCELERATOR LAB, THEORET PHYS GRP, BATAVIA, IL 60510 USA. RP CORNELL UNIV, NEWMAN LAB NUCL STUDIES, ITHACA, NY 14853 USA. NR 39 TC 845 Z9 845 U1 0 U2 7 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 SEP 1 PY 1993 VL 48 IS 5 BP 2250 EP 2264 DI 10.1103/PhysRevD.48.2250 PG 15 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100041 ER PT J AU MORNINGSTAR, CJ AF MORNINGSTAR, CJ TI HEAVY-QUARK SELF-ENERGY IN NONRELATIVISTIC LATTICE QCD SO PHYSICAL REVIEW D LA English DT Article ID FIELDS AB The heavy-quark self-energy in nonrelativistic lattice QCD is calculated to O(alpha(s)) in perturbation theory. The heavy-quark action includes all spin-independent relativistic corrections to order v2, where v is the typical heavy-quark velocity, and all spin-dependent corrections to order v4. The standard Wilson action and an improved multiplaquette action are used for the gluons. Results for the mass renormalization, wave function renormalization, and energy shift are given; tadpole contributions are found to be large. A tadpole improvement scheme in which all link variables are rescaled by a mean-field factor is also studied. The effectiveness of this scheme in offsetting the large tadpole contributions to the heavy-quark renormalization parameters is demonstrated. RP MORNINGSTAR, CJ (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. RI Morningstar, Colin/N-6925-2014 OI Morningstar, Colin/0000-0002-0607-9923 NR 9 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 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD SEP 1 PY 1993 VL 48 IS 5 BP 2265 EP 2278 DI 10.1103/PhysRevD.48.2265 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LW391 UT WOS:A1993LW39100042 ER PT J AU MOSHAMMER, H AF MOSHAMMER, H TI MOMENTS AND CHARACTERISTIC FUNCTION OF A NONSTATIONARY PARTICLE DISTRIBUTION AFTER INJECTION SO PHYSICAL REVIEW E LA English DT Article ID INVARIANTS AB This paper studies the injection process into a storage ring and presents an analytic model for the nonstationary particle distribution after mismatched or off-axis injection. The effects of nonlinear fields as well as the coupling to the longitudinal motion are described by analytic expressions for the first moments of the particle distribution. The result contains two distinct approximations: first, the Hamiltonian has been replaced by a Hamiltonian averaged over the phase variable; second, the characteristic function of the longitudinal distribution has been confined to the first two cumulants. Functions of moments that remain invariant for this averaged Hamiltonian are constructed. RP MOSHAMMER, H (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA. NR 22 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD SEP PY 1993 VL 48 IS 3 BP 2140 EP 2148 DI 10.1103/PhysRevE.48.2140 PG 9 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA LY667 UT WOS:A1993LY66700068 ER PT J AU ROBIN, D FOREST, E PELLEGRINI, C AMIRY, A AF ROBIN, D FOREST, E PELLEGRINI, C AMIRY, A TI QUASI-ISOCHRONOUS STORAGE-RINGS SO PHYSICAL REVIEW E LA English DT Article AB A study is made of the single-particle dynamics of an electron-positron storage ring where the phase-slip factor is made small in order to make the ring nearly isochronous and reduce the bunch length. What is found is that a quasi-isochronous ring makes it possible to obtain a bunch length in the millimeter range, about one order of magnitude shorter than present values. In this study we have extended the work of others on isochronous storage rings by quantitatively including higher-order terms in the longitudinal equations of motion. Scaling laws are then derived relating the linear term with the next-highest-order term. These scaling laws, which are derived from a two-dimensional Hamiltonian (one dimension of position and one of momentum), establish criteria for stability. These scaling laws are then checked with full six-dimensional tracking on one particular lattice. C1 LAWRENCE BERKELEY LAB,FUS RES DIV,BERKELEY,CA 94720. UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024. RP ROBIN, D (reprint author), LAWRENCE BERKELEY LAB,CTR BEAM PHYS,BERKELEY,CA 94720, USA. NR 12 TC 27 Z9 28 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD SEP PY 1993 VL 48 IS 3 BP 2149 EP 2156 DI 10.1103/PhysRevE.48.2149 PG 8 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA LY667 UT WOS:A1993LY66700069 ER PT J AU TRACY, ER KAUFMAN, AN AF TRACY, ER KAUFMAN, AN TI METAPLECTIC FORMULATION OF LINEAR-MODE CONVERSION SO PHYSICAL REVIEW E LA English DT Article ID PHASE-SPACE; WIGNERS FUNCTION; WAVES AB The metaplectic formulation of linear mode conversion is presented. We begin by discussing the connection between wave operators in weakly inhomogeneous media, their symbols, and related pseudodifferential operators. A brief summary of WKB theory and Hamiltonian ray dynamics is given. In regions where mode conversion occurs, the WKB approximation breaks down and must be replaced by an appropriate local approximation. This is done by expanding in a Taylor series about the degenerate region and keeping only the leading-order terms. At leading order a linear canonical transformation on the ray phase space can be performed which brings the system into a simpler form. This linear canonical transformation induces a unitary transformation, called a metaplectic transformation, in the wave function's Hilbert space. This is a generalization of the Fourier transformation. The advantage of metaplectic techniques over Fourier techniques lies in the wider range of transformations available to simplify the problem. We show how to construct the S matrix, relating incoming and outgoing waves, and the Wigner tensor. We examine the Wigner function in detail with particular attention to its asymptotic properties. C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. RP TRACY, ER (reprint author), COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23185, USA. NR 17 TC 31 Z9 31 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD SEP PY 1993 VL 48 IS 3 BP 2196 EP 2211 DI 10.1103/PhysRevE.48.2196 PG 16 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA LY667 UT WOS:A1993LY66700076 ER PT J AU LI, D BALL, M BRABSON, B BUDNICK, J CAUSSYN, DD CHAO, AW COLLINS, J DERENCHUK, V DUTT, S EAST, G ELLISON, M FRIESEL, D HAMILTON, B HUANG, H JONES, WP LEE, SY MINTY, MG NAGAITSEV, S NG, KY PEI, X SLOAN, T SYPHERS, M TENG, L WANG, Y YAN, YT ZHANG, PL AF LI, D BALL, M BRABSON, B BUDNICK, J CAUSSYN, DD CHAO, AW COLLINS, J DERENCHUK, V DUTT, S EAST, G ELLISON, M FRIESEL, D HAMILTON, B HUANG, H JONES, WP LEE, SY MINTY, MG NAGAITSEV, S NG, KY PEI, X SLOAN, T SYPHERS, M TENG, L WANG, Y YAN, YT ZHANG, PL TI EXPERIMENTAL-MEASUREMENT OF RESONANCE ISLANDS INDUCED BY RF VOLTAGE MODULATION SO PHYSICAL REVIEW E LA English DT Note AB Synchrotron motion with an external rf voltage modulation was studied experimentally. Beam particles, in the presence of electron cooling, were observed to damp to the basins of resonance islands, which were produced by the parametric resonance due to rf voltage modulation. The measured phase amplitudes of the centers of these resonance islands were found to agree well with theory. C1 SUPERCONDUCTING SUPERCOLLIDER LAB,DALLAS,TX 75237. STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. ARGONNE NATL LAB,ARGONNE,IL 60439. BROOKHAVEN NATL LAB,UPTON,NY 11973. RP LI, D (reprint author), INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47405, USA. NR 11 TC 30 Z9 30 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1063-651X J9 PHYS REV E JI Phys. Rev. E PD SEP PY 1993 VL 48 IS 3 BP R1638 EP R1641 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA LY667 UT WOS:A1993LY66700010 ER PT J AU ALDE, D BINON, FG BRICMAN, C BOUTEMEUR, M GOUANERE, M DONSKOV, SV INYAKIN, AV KACHANOV, VA KONDASHOV, AA KULIK, AV LANDSBERG, GL LEDNEV, AA LISHIN, VA KNAPP, EA PEIGNEUX, JP POLOVNIKOV, SA POLYAKOV, VA PROKOSHKIN, YD POULET, M SADOVSKII, SA SAMOILENKO, VD SINGOVSKII, AV STROOT, JP SUGONYAEV, VP KHAUSTOV, GV SHAGIN, PM SHTANNIKOV, AV AF ALDE, D BINON, FG BRICMAN, C BOUTEMEUR, M GOUANERE, M DONSKOV, SV INYAKIN, AV KACHANOV, VA KONDASHOV, AA KULIK, AV LANDSBERG, GL LEDNEV, AA LISHIN, VA KNAPP, EA PEIGNEUX, JP POLOVNIKOV, SA POLYAKOV, VA PROKOSHKIN, YD POULET, M SADOVSKII, SA SAMOILENKO, VD SINGOVSKII, AV STROOT, JP SUGONYAEV, VP KHAUSTOV, GV SHAGIN, PM SHTANNIKOV, AV TI MODEL-INDEPENDENT DETERMINATION OF THE OMEGA-]ETA-GAMMA DECAY PROBABILITY SO PHYSICS OF ATOMIC NUCLEI LA English DT Article ID RADIATIVE DECAYS; QUARK-MODEL; MESONS; OMEGA AB The branching ratio of a rare radiative decay of the omega meson has been measured: Br(omega --> etagamma) = (8.3 +/- 2.1) . 10(-4). The omega mesons were produced in charge-exchange pi-p scattering at an energy of 38 GeV and at large values of the momentum transfer, at which omega-rho interference is suppressed. The GAMS-2000 multiphoton spectrometer was used to detect gamma rays from the decay of the omega mesons. C1 PARTICLE PHYS LAB, ANNECY, FRANCE. LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA. FREE UNIV BRUSSELS, INST NUCL RES, B-1050 BRUSSELS, BELGIUM. RP PROTVINO HIGH ENERGY PHYS, PROTVINO, RUSSIA. NR 23 TC 0 Z9 0 U1 0 U2 0 PU MAIK NAUKA/INTERPERIODICA/SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA SN 1063-7788 EI 1562-692X J9 PHYS ATOM NUCL+ JI Phys. Atom. Nuclei PD SEP PY 1993 VL 56 IS 9 BP 1229 EP 1234 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA MA443 UT WOS:A1993MA44300013 ER PT J AU TERRONES, G AF TERRONES, G TI CROSS-DIFFUSION EFFECTS ON THE STABILITY-CRITERIA IN A TRIPLY DIFFUSIVE SYSTEM SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID FLUID LAYER; CONVECTIVE INSTABILITY; ONSET AB The effects of cross-diffusion on the onset of convective instability in a horizontally unbounded, triply diffusive, and triply stratified fluid layer (triply cross-diffusive fluid layer) are investigated. Analytical solutions are obtained for steady and oscillatory onset when imposed gradients of the stratifying agencies are constant and vertical. Numerical results are based on diffusivity data for the system water/potassium chloride/potassium phosphate/phosphoric acid solution. Depending on the magnitude of the stratifying agencies, linear stability analysis shows that cross-diffusion can either stabilize or destabilize a fluid layer. The off-diagonal elements of the diffusivity matrix, which arise naturally as a result of the coupling among the various stratifying agencies, may strongly affect boundaries of convective stability and neutral curves. Discrepancies in the linear stability criteria were observed for seemingly negligible off-diagonal elements of the diffusivity matrix. RP TERRONES, G (reprint author), PACIFIC NW LAB, DEPT ANALYT SCI, RICHLAND, WA 99352 USA. OI Terrones, Guillermo/0000-0001-8245-5022 NR 16 TC 19 Z9 19 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD SEP PY 1993 VL 5 IS 9 BP 2172 EP 2182 DI 10.1063/1.858556 PG 11 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA LU503 UT WOS:A1993LU50300012 ER PT J AU MONTGOMERY, D SHAN, XW MATTHAEUS, WH AF MONTGOMERY, D SHAN, XW MATTHAEUS, WH TI NAVIER-STOKES RELAXATION TO SINH POISSON STATES AT FINITE REYNOLDS-NUMBERS SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID NEGATIVE TEMPERATURE STATES; STATISTICAL-MECHANICS; VORTICES; TURBULENCE; EQUATION; DYNAMICS AB A mathematical framework is proposed in which it seems possible to justify the computationally-observed relaxation of a two-dimensional Navier-Stokes fluid to a ''most probable,'' or maximum entropy, state. The relaxation occurs at large but finite Reynolds numbers, and involves substantial decay of higher-order ideal invariants such as enstrophy. A two-fluid formulation, involving interpenetrating positive and negative vorticity fluxes (continuous and square integrable) is developed, and is shown to be intimately related to the passive scalar decay problem. Increasing interpenetration of the two fluids corresponds to the decay of vorticity flux due to viscosity. It is demonstrated numerically that, in two dimensions, passive scalars decay rapidly, relative to mean-square vorticity (enstrophy). This observation provides a basis for assigning initial data to the two-fluid field variables. C1 LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. UNIV DELAWARE,BARTOL RES INST,NEWARK,DE 19716. RP MONTGOMERY, D (reprint author), DARTMOUTH COLL,DEPT PHYS & ASTRON,HANOVER,NH 03755, USA. RI Shan, Xiaowen/H-2836-2013 OI Shan, Xiaowen/0000-0002-6350-9248 NR 27 TC 48 Z9 50 U1 2 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD SEP PY 1993 VL 5 IS 9 BP 2207 EP 2216 DI 10.1063/1.858558 PG 10 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA LU503 UT WOS:A1993LU50300015 ER PT J AU KIMURA, Y KRAICHNAN, RH AF KIMURA, Y KRAICHNAN, RH TI STATISTICS OF AN ADVECTED PASSIVE SCALAR SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Article ID PROBABILITY DENSITY-FUNCTION; RANDOM VELOCITY-FIELD; NUMERICAL SIMULATIONS; BENARD CONVECTION; TURBULENCE; DISTRIBUTIONS; TRANSPORT; GRADIENT; MODELS AB An elementary argument shows that non-Gaussian fluctuations in the temperature at a point in space are induced by random advection of a passive temperature field that has a nonlinear mean gradient, whether or not there is molecular diffusion. This is corroborated by exact analysis for the nondiffusive case and by direct numerical simulation for diffusive cases. Eulerian mapping closure gives results close to the simulation data. Non-Gaussian fluctuations of temperature at a point also are induced by a more subtle mechanism that requires both advection and molecular diffusion and is effective even when the statistics are strictly homogeneous. It operates through selectively strong dissipation of regions where intense temperature gradients have been induced by advective straining. This phenomenon is demonstrated by simulations and explored by means of an idealized analytical model. C1 NATL CTR ATMOSPHER RES,BOULDER,CO 80307. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87545. NR 29 TC 47 Z9 47 U1 3 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD SEP PY 1993 VL 5 IS 9 BP 2264 EP 2277 DI 10.1063/1.858530 PG 14 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA LU503 UT WOS:A1993LU50300022 ER PT J AU KOSTIUK, LW LIBBY, PA AF KOSTIUK, LW LIBBY, PA TI COMPARISON BETWEEN THEORY AND EXPERIMENT FOR TURBULENCE IN OPPOSED STREAMS SO PHYSICS OF FLUIDS A-FLUID DYNAMICS LA English DT Note ID FLOWS AB Experimental data on the mean axial velocity and the intensity of the radial and axial velocity components on the axis of counterflowing turbulent streams are compared with a previously published Reynolds stress theory. Agreement is found to be satisfactory. C1 UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. RP KOSTIUK, LW (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 11 TC 13 Z9 19 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8213 J9 PHYS FLUIDS A-FLUID PD SEP PY 1993 VL 5 IS 9 BP 2301 EP 2303 DI 10.1063/1.858535 PG 3 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA LU503 UT WOS:A1993LU50300027 ER PT J AU HIRSHMAN, SP AF HIRSHMAN, SP TI CALCULATION OF BETA-1 AND I(I) FOR 3-DIMENSIONAL PLASMA CONFIGURATIONS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID CROSS-SECTION; LI AB The Shafranov equilibrium formulas for tokamaks relate volume-averaged thermal pressure and magnetic pressure to integrals of the measurable poloidal magnetic field energy at the plasma surface. Similar integral relations are derived that are valid for a general, three-dimensional plasma confinement geometry. RP HIRSHMAN, SP (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 3 TC 3 Z9 3 U1 1 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3119 EP 3121 DI 10.1063/1.860647 PG 3 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500001 ER PT J AU COBB, JW TAJIMA, T BARNES, DC AF COBB, JW TAJIMA, T BARNES, DC TI PROFILE STABILIZATION OF TILT MODE IN A FIELD-REVERSED CONFIGURATION SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID COMPACT TOROIDS; FRX-C; EQUILIBRIA; STABILITY; PLASMA; INSTABILITY; TORUS; BEAMS AB The possibility of stabilizing the tilt mode in field-reversed configurations without resorting to explicit kinetic effects such as large ion orbits is investigated. Various pressure profiles, P(PSI), are chosen, including ''hollow'' profiles, where current is strongly peaked near the separatrix. Numerical equilibria are used as input for an initial value simulation, which uses an extended magnetohydrodynamic (MHD) model that includes viscous and Hall terms. Tilt stability is found for specific hollow profiles when accompanied by high values of separatrix beta, beta(sep). The stable profiles also have moderate to large elongation, racetrack separatrix shape, and lower values of sBAR, average ratio of Larmor radius to device radius. The stability is unaffected by changes in viscosity, but the neglect of the Hall term does cause stable results to become marginal or unstable. Implications for interpretation of recent experiments are discussed. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP COBB, JW (reprint author), UNIV TEXAS,INST FUS STUDIES,AUSTIN,TX 78712, USA. NR 41 TC 18 Z9 18 U1 0 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3227 EP 3238 DI 10.1063/1.860658 PG 12 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500013 ER PT J AU HAHM, TS AF HAHM, TS TI ATOMIC PHYSICS EFFECTS ON TOKAMAK EDGE DRIFT-TEARING MODES SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID LINEAR-STABILITY; H TRANSITION; PLASMAS; INSTABILITY; TURBULENCE; WAVE AB The effects of ionization and charge exchange on the linear stability of drift-tearing modes are analytically investigated. In particular, the linear instability threshold DELTA(Th), produced by ion sound wave coupling [Phys. Rev. Lett. 40, 1500 (1978)] is modified. In the strongly collisional regime, the ionization breaks up the near cancellation of the perturbed electric field and the pressure gradient along the magnetic field, and increases the threshold. In the semicollisional regime, both ionization and charge exchange act as drag on the ion parallel velocity [Phys. Fluids B 4, 2567 ( 1992) ], and consequently decrease.the threshold by reducing the effectiveness of ion sound wave propagation. RP HAHM, TS (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 22 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3246 EP 3251 DI 10.1063/1.860660 PG 6 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500015 ER PT J AU TSAI, ST CHEN, L AF TSAI, ST CHEN, L TI THEORY OF KINETIC BALLOONING MODES EXCITED BY ENERGETIC PARTICLES IN TOKAMAKS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID TOROIDAL ALFVEN EIGENMODES; ALPHA-PARTICLES; EXCITATION; PLASMAS; SHEAR AB Resonant excitations of kinetic ballooning modes by the energetic ions/alpha particles in tokamaks have been analyzed theoretically. The theoretical analysis includes finite-size orbit effects of both circulating and trapped particles. With energetic particle contributions suppressed in the singular inertial layer, an analytic dispersion relation can then be derived via an asymptotic matching analysis. The dispersion relation, in particular, demonstrates the existence of two types of modes; that is, the magnetohydrodynamic gap mode and the energetic-particle continuum mode. Specific expressions for real frequencies, growth rates and threshold conditions are also derived for a model slowing-down beam ion distribution function. C1 PRINCETON UNIV,DEPT ASTROPHYS SCI,PRINCETON,NJ 08543. CHINESE ACAD SCI,INST PHYS,BEIJING 100080,PEOPLES R CHINA. RP TSAI, ST (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,POB 451,PRINCETON,NJ 08543, USA. RI chen, liu/I-2297-2013 NR 17 TC 100 Z9 100 U1 1 U2 12 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3284 EP 3290 DI 10.1063/1.860624 PG 7 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500020 ER PT J AU WU, YL WHITE, RB AF WU, YL WHITE, RB TI NUMERICAL-SIMULATION OF BOOTSTRAP CURRENT SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID NEUTRAL INJECTION; PLASMA TRANSPORT; CURRENT DRIVE; ASPECT-RATIO; TOKAMAK; CONFINEMENT; DIFFUSION; TORUS AB The neoclassical theory of bootstrap current in toroidal systems is calculated in magnetic flux coordinates and confirmed by numerical simulation. The effects of magnetic ripple, loop voltage. and magnetic and electrostatic perturbations on bootstrap current for the cases of zero and finite plasma pressure are studied. The numerical results are in reasonable agreement with analytical estimates. RP WU, YL (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08544, USA. RI White, Roscoe/D-1773-2013 OI White, Roscoe/0000-0002-4239-2685 NR 26 TC 10 Z9 10 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3291 EP 3298 DI 10.1063/1.860625 PG 8 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500021 ER PT J AU KEANE, CJ HAMMEL, BA KANIA, DR KILKENNY, JD LEE, RW OSTERHELD, AL SUTER, LJ MANCINI, RC HOOPER, CF DELAMATER, ND AF KEANE, CJ HAMMEL, BA KANIA, DR KILKENNY, JD LEE, RW OSTERHELD, AL SUTER, LJ MANCINI, RC HOOPER, CF DELAMATER, ND TI X-RAY SPECTROSCOPY OF HIGH-ENERGY DENSITY INERTIAL CONFINEMENT FUSION PLASMAS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID LASER-PRODUCED PLASMAS; K-SHELL; DRIVEN IMPLOSIONS; LINE-PROFILES; TEMPERATURE; DIAGNOSIS; EXCITATION; EMITTERS; SPECTRA; CARBON AB Analysis is presented of K- and L-shell spectra obtained from Ar and Xe dopants seeded into the fuel region of plastic capsules indirectly imploded using the Nova laser. Stark broadening measurements of the n = 3-1 lines in H- and He-like Ar (Ar Ly-beta and He-beta, respectively) are used to infer fuel electron density, while spatially averaged fuel electron temperature is deduced from the ratio of the intensities of these lines. Systematic variations in Ar spectral features are observed as a function of drive conditions. A spectral postprocessing code has been developed to simulate experimental spectra by taking into account spatial gradients and line transfer effects, and shows good agreement with experimental data. It is shown that correct modeling of the x-ray emission requires a proper treatment of the coupled radiative transfer and kinetics problem. Continuum lowering effects are shown not to affect diagnostic line ratios, within the confines of a simple model. A recently developed diagnostic based on fitting measured line profiles of Ar He-beta and its associated dielectronic satellites to theory is shown to provide a simultaneous measure of electron temperature and electron density. L-shell Xe spectroscopy is under development as an electron temperature and electron-density diagnostic. Density and temperature sensitive ratios of spectral features each consisting of many lines have been identified. Observed Xe spectra from imploded cores show the same qualitative behavior with temperature, as predicted by model calculations of Xe emission spectra. Stark broadening of Ne-like Xe 4-2 lines appears viable as an electron density diagnostic for N(e) approximately 10(25) CM-3 and is under continuing investigation. (Based on the invited paper 8I3 at the 1992 APS/DPP annual meeting [Bull. Am. Phys. Soc. 37, 1553 (1992)].) C1 UNIV FLORIDA,GAINESVILLE,FL 32611. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP KEANE, CJ (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 43 TC 59 Z9 67 U1 1 U2 5 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3328 EP 3336 DI 10.1063/1.860964 PG 9 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500025 ER PT J AU ROSE, HA DUBOIS, DF AF ROSE, HA DUBOIS, DF TI INITIAL DEVELOPMENT OF PONDEROMOTIVE FILAMENTS IN PLASMA FROM INTENSE HOT-SPOTS PRODUCED BY A RANDOM-PHASE PLATE SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID INDUCED SPATIAL INCOHERENCE; ELECTRON HEAT-TRANSPORT; SCALE-LENGTH PLASMAS; LASER-LIGHT; SMOOTHING TECHNIQUES; RAMAN-SCATTERING; BRILLOUIN; RADIATION AB Local intensity peaks, hot spots, in laser beams may initiate self-focusing, in lieu of linear instabilities. If the hot spot power, P, contains several times the critical power, P(c), and if the plasma density, n, is small compared to the critical density, n(c), then on a time scale less than an acoustic transit time across the hot spot radius, tau(ia), the hot spot collapses, capturing order unity of the initial hot spot power. The collapse time is determined as a universal function of P/P(c) and tau(ia). The focal region moves towards the laser with an initially supersonic speed, and decelerates as it propagates. The power of this back propagating focus decreases monotonically until the critical power is reached. This limiting, shallowest, focus develops on a time scale long compared to tau(ia) and corresponds to the focus obtained in a model with adiabatically responding ions. For low-density plasma nonlinear ion effects terminate collapse and a bound on the transient intensity amplification is obtained as a universal function of the optics f/number, F, and n/n(c) The boundary between thermal and ponderomotive regimes depends upon F and not the laser intensity. RP ROSE, HA (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA. NR 47 TC 52 Z9 52 U1 1 U2 7 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3337 EP 3356 DI 10.1063/1.860629 PG 20 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500026 ER PT J AU YANG, TYB GALLANT, Y ARONS, J LANGDON, AB AF YANG, TYB GALLANT, Y ARONS, J LANGDON, AB TI WEIBEL INSTABILITY IN RELATIVISTICALLY HOT MAGNETIZED ELECTRON-POSITRON PLASMAS SO PHYSICS OF FLUIDS B-PLASMA PHYSICS LA English DT Article ID ANISOTROPIC PLASMAS; ELECTROMAGNETIC INSTABILITIES; NONLINEAR DEVELOPMENT; MASER INSTABILITIES; ANALYTICAL MODEL; CRAB-NEBULA; WHISTLER; SHOCKS; ACCELERATION; ENERGY AB A linear stability analysis is carried out for the Weibel instability in relativistic magnetized electron-positron-pair plasmas, with the propagation direction parallel to the background magnetic field. The instability in the ultrarelativistic regime, with the typical Lorentz factor gamma much greater than unity, is emphasized for its relevance to astrophysical sources of synchrotron radiation. Detailed stability properties are examined, in the ultrarelativistic regime, for two model distribution functions, the water-bag distribution function, and a smooth distribution function. The dispersion relations are obtained in closed analytic forms for both distribution functions. The necessary and sufficient conditions for instability are determined when the temperature along the background magnetic field is cold (T(parallel-to) = 0). The dispersion relations are solved numerically with T(parallel-to) not-equal 0 over a wide range of system parameters to determine the detailed dependence of the instability on the strength of the background magnetic field and the temperature anisotropy. The present analysis shows that both a decrease in temperature anisotropy and an increase in the background magnetic field can cause a significant decrease in growth rate. For the smooth distribution function, it is found that, for a given plasma density, the system stabilizes completely when the background magnetic field is stronger than the moderate threshold value [(omega(p+/-)/omega(c+/-))2 less-than-or-equal-to 2/pi], corresponding to T(parallel-to) = 0. As the temperature anisotropy decreases, the threshold magnetic field decreases. C1 LAWRENCE LIVERMORE NATL LAB,PLASMA PHYS RES INST,LIVERMORE,CA 94550. LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,LIVERMORE,CA 94550. UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT ASTRON,BERKELEY,CA 94720. LAWRENCE LIVERMORE NATL LAB,DIV X,LIVERMORE,CA 94550. RP YANG, TYB (reprint author), UNIV CALIF BERKELEY,CTR THEORET ASTROPHYS,BERKELEY,CA 94720, USA. NR 50 TC 42 Z9 42 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0899-8221 J9 PHYS FLUIDS B-PLASMA PD SEP PY 1993 VL 5 IS 9 BP 3369 EP 3387 DI 10.1063/1.860631 PG 19 WC Physics, Fluids & Plasmas SC Physics GA LX855 UT WOS:A1993LX85500028 ER PT J AU STONE, JL AF STONE, JL TI PHOTOVOLTAICS - UNLIMITED ELECTRICAL ENERGY FROM THE SUN SO PHYSICS TODAY LA English DT Article RP STONE, JL (reprint author), NATL RENEWABLE ENERGY LAB,PHOTOVOLTA PROGRAMS,GOLDEN,CO, USA. NR 10 TC 8 Z9 8 U1 0 U2 3 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD SEP PY 1993 VL 46 IS 9 BP 22 EP 29 DI 10.1063/1.881362 PG 8 WC Physics, Multidisciplinary SC Physics GA LY653 UT WOS:A1993LY65300009 ER PT J AU TSUJI, J ZOOK, M SOMERVILLE, SC LAST, RL HAMMERSCHMIDT, R AF TSUJI, J ZOOK, M SOMERVILLE, SC LAST, RL HAMMERSCHMIDT, R TI EVIDENCE THAT TRYPTOPHAN IS NOT A DIRECT BIOSYNTHETIC INTERMEDIATE OF CAMALEXIN IN ARABIDOPSIS-THALIANA SO PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY LA English DT Article ID SULFUR-CONTAINING PHYTOALEXIN; LEPTOSPHAERIA-MACULANS; STRESS METABOLITES; HYPERSENSITIVE REACTION; BRASSICA-JUNCEA; ACCUMULATION; CRUCIFERAE; MUTANTS; ELICITATION; RESISTANCE C1 MICHIGAN STATE UNIV,DOE,PLANT RES LAB,E LANSING,MI 48824. MICHIGAN STATE UNIV,DEPT BOT & PLANT PATHOL,E LANSING,MI 48824. RI Last, Robert/D-9197-2011; OI Last, Robert/0000-0001-6974-9587 NR 19 TC 50 Z9 52 U1 0 U2 0 PU ACADEMIC PRESS LTD PI LONDON PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX SN 0885-5765 J9 PHYSIOL MOL PLANT P JI Physiol. Mol. Plant Pathol. PD SEP PY 1993 VL 43 IS 3 BP 221 EP 229 DI 10.1006/pmpp.1993.1052 PG 9 WC Plant Sciences SC Plant Sciences GA MW209 UT WOS:A1993MW20900005 ER PT J AU GUNDERSON, CA NORBY, RJ WULLSCHLEGER, SD AF GUNDERSON, CA NORBY, RJ WULLSCHLEGER, SD TI FOLIAR GAS-EXCHANGE RESPONSES OF 2 DECIDUOUS HARDWOODS DURING 3 YEARS OF GROWTH IN ELEVATED CO2 - NO LOSS OF PHOTOSYNTHETIC ENHANCEMENT SO PLANT CELL AND ENVIRONMENT LA English DT Article DE QUERCUS-ALBA; LIRIODENDRON-TULIPIFERA; WHITE OAK; YELLOW-POPLAR; ELEVATED ATMOSPHERIC CARBON DIOXIDE; PHOTOSYNTHESIS; ACCLIMATION; STOMATAL CONDUCTANCE; WATER USE EFFICIENCY; SENESCENCE ID CARBON-DIOXIDE ENRICHMENT; LIRIODENDRON-TULIPIFERA L; LONG-TERM EXPOSURE; ATMOSPHERIC CO2; CO2-ENRICHED ATMOSPHERES; SCIRPUS-OLNEYI; TUSSOCK TUNDRA; WATER-USE; SEEDLINGS; LEAVES AB Responses of photosynthesis and stomatal conductance were monitored throughout a 3-year field exposure of Liriodendron tulipifera (yellow-poplar) and Quercus alba (white oak) to elevated concentrations of atmospheric CO2. Exposure to atmospheres enriched with +150 and +300 mumol mol-1 CO2 increased net photosynthesis by 12-144% over the course of the study. Net photosynthesis was consistently higher at +300 than at +150 mumol mol-1 CO2. The effect Of CO2 enrichment on stomatal conductance was limited, but instantaneous leaf-level water use efficiency increased significantly. No decrease in the responsiveness of photosynthesis to CO2 enrichment over time was detected, and the responses were consistent throughout the canopy and across successive growth flushes and seasons. The relationships between internal CO2 concentration and photosynthesis (e.g. photosynthetic capacity and carboxylation efficiency) were not altered by growth at elevated concentrations of CO2. No alteration in the timing of leaf senescence or abscission was detected, suggesting that the seasonal duration of effective gas-exchange was unaffected by CO2 treatment. These results are consistent with data previously reported for these species in controlled-environment studies, and suggest that leaf-level photosynthesis does not down-regulate in these species as a result of acclimation to CO2 enrichment in the field. This sustained enhancement of photosynthesis provides the opportunity for increased growth and carbon storage by trees as the atmospheric concentration of CO2 rises, but many additional factors interact in determining whole-plant and forest responses to global change. RP GUNDERSON, CA (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Wullschleger, Stan/B-8297-2012; Norby, Richard/C-1773-2012 OI Wullschleger, Stan/0000-0002-9869-0446; Norby, Richard/0000-0002-0238-9828 NR 39 TC 137 Z9 158 U1 1 U2 8 PU BLACKWELL SCIENCE LTD PI OXFORD PA OSNEY MEAD, OXFORD, OXON, ENGLAND OX2 0EL SN 0140-7791 J9 PLANT CELL ENVIRON JI Plant Cell Environ. PD SEP PY 1993 VL 16 IS 7 BP 797 EP 807 DI 10.1111/j.1365-3040.1993.tb00501.x PG 11 WC Plant Sciences SC Plant Sciences GA LZ893 UT WOS:A1993LZ89300004 ER PT J AU AKIMITSU, K HART, LP WALTON, JD AF AKIMITSU, K HART, LP WALTON, JD TI DENSITY GRADIENT STUDY OF VICTORIN-BINDING PROTEINS IN OAT (AVENA-SATIVA) CELLS SO PLANT PHYSIOLOGY LA English DT Article ID TUMOR NECROSIS FACTOR; SILICA SOLS; RECEPTOR; INHIBITION; MESOCOTYL; VESICLES; SITES; MAIZE; LIGHT AB Victorin-binding proteins (VBPs) in oat (Avena sativa) cells were identified using native victorin and anti-victorin polyclonal antibodies. Homogenates of oat tissues were fractionated in continuous or discontinuous sucrose density gradients or with an aqueous two-phase method, and covalent binding sites of victorin were detected by western blotting. In a 20 to 45% (w/w) sucrose continuous density gradient, the 100-kD VBP was located in fractions of 37 to 44% sucrose, with a peak at 39% sucrose. Based on marker enzyme assays, plasma membranes peaked at 39 to 41% sucrose, mitochondria peaked at 41%, but Golgi and endoplasmic reticulum were in lower density fractions, peaking at 28 to 29% and 22 to 24% sucrose, respectively. The 100-kD VBP was not found in plasma membranes purified by the aqueous two-phase method or in mitochondria purified by discontinuous density gradient centrifugation. Victorin binding to 65- and 45-kD proteins was detected in all fractions in the continuous sucrose density gradients. The 65- and 45-kD proteins were both detected in purified plasma membranes, but only the 65-kD protein was detected in purified mitochondria. The subcellular location of VBPs was the same in sensitive and resistant oat cells. C1 MICHIGAN STATE UNIV,DEPT BOT & PLANT PATHOL,E LANSING,MI 48824. MICHIGAN STATE UNIV,PESTICIDE RES CTR,E LANSING,MI 48824. MICHIGAN STATE UNIV,US DOE,PLANT RES LAB,E LANSING,MI 48824. NR 24 TC 6 Z9 6 U1 0 U2 0 PU AMER SOC PLANT PHYSIOLOGISTS PI ROCKVILLE PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 SN 0032-0889 J9 PLANT PHYSIOL JI Plant Physiol. PD SEP PY 1993 VL 103 IS 1 BP 67 EP 72 PG 6 WC Plant Sciences SC Plant Sciences GA LX592 UT WOS:A1993LX59200009 ER PT J AU ORBOVIC, V POFF, KL AF ORBOVIC, V POFF, KL TI GROWTH DISTRIBUTION DURING PHOTOTROPISM OF ARABIDOPSIS-THALIANA SEEDLINGS SO PLANT PHYSIOLOGY LA English DT Article ID MAIZE COLEOPTILES; AVENA COLEOPTILES; LIGHT; PHYCOMYCES; CURVATURE; RESPONSES; KINETICS AB The elongation rates of two opposite sides of hypocotyls of Arabidopsis thaliana seedlings were measured during phototropism by using an infrared imaging system. In first positive phototropism, second positive phototropism, and red light-enhanced first positive phototropism, curvature toward the light source was the result of an increase in the rate of elongation of the shaded side and a decrease in the rate of elongation of the lighted side of the seedlings. The phase of straightening that followed maximum curvature resulted from a decrease in the elongation rate of the shaded side and an increase in the elongation rate of the lighted side. These data for the three types of blue light-induced phototropism tested in this study and for the phase of straightening are all clearly consistent with the growth rate changes predicted by the Cholodny-Went theory. C1 MICHIGAN STATE UNIV,US DOE,PLANT RES LAB,E LANSING,MI 48824. NR 31 TC 15 Z9 15 U1 1 U2 3 PU AMER SOC PLANT PHYSIOLOGISTS PI ROCKVILLE PA 15501 MONONA DRIVE, ROCKVILLE, MD 20855 SN 0032-0889 J9 PLANT PHYSIOL JI Plant Physiol. PD SEP PY 1993 VL 103 IS 1 BP 157 EP 163 PG 7 WC Plant Sciences SC Plant Sciences GA LX592 UT WOS:A1993LX59200020 ER PT J AU PAIK, SH HUANG, PC HEBERLEIN, J PFENDER, E AF PAIK, SH HUANG, PC HEBERLEIN, J PFENDER, E TI DETERMINATION OF THE ARC-ROOT POSITION IN A DC PLASMA TORCH SO PLASMA CHEMISTRY AND PLASMA PROCESSING LA English DT Article DE DC PLASMA TORCHES; ANODE ARC ROOT; STEENBECK MINIMUM PRINCIPLE; ANALYSIS ID FLOW; FLUID AB The behavior of an arc operated in the nontransferred mode with a conical-shaped cathode and a nozzle-shaped anode is studied by applying general two-dimensional conservation equations and auxiliary relations for the simulation of arc channel flows. The position of the arc-root attachment at the anode surface is determined by using Steenbeck's minimum principle, which postulates a minimum arc voltage for a given current and certain given boundary conditions. The overall effects of the anode-arc root on the plasma flow are studied by comparing the results with those of the transferred mode of operation. Specific arc-channel diameters are chosen in the simulation in order to verify the numerical model through comparisons with experimental results. The results show that Steenbeck's minimum principle is useful for determining the position of the arc-root attachment at the anode surface. Application of this method for control of the arc-anode attachment may be valuable in the design and operation of plasma spray torches to avoid jet instabilities. C1 UNIV MINNESOTA,DEPT MICROBIOL & PARASITOL,MINNEAPOLIS,MN 55455. RP PAIK, SH (reprint author), IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA. NR 23 TC 46 Z9 51 U1 4 U2 14 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4324 J9 PLASMA CHEM PLASMA P JI Plasma Chem. Plasma Process. PD SEP PY 1993 VL 13 IS 3 BP 379 EP 397 DI 10.1007/BF01465872 PG 19 WC Engineering, Chemical; Physics, Applied; Physics, Fluids & Plasmas SC Engineering; Physics GA MA438 UT WOS:A1993MA43800002 ER PT J AU RAMSHAW, JD CHANG, CH AF RAMSHAW, JD CHANG, CH TI AMBIPOLAR DIFFUSION IN 2-TEMPERATURE MULTICOMPONENT PLASMAS SO PLASMA CHEMISTRY AND PLASMA PROCESSING LA English DT Article DE DIFFUSION; AMBIPOLAR; 2-TEMPERATURE PLASMAS AB A recent formulation of multicomponent diffusion in multitemperature gas mixtures [J. D. Ramshaw, J. Non-equilib. Thermodyn. 18, 121 (1993)] is applied to ambipolar diffusion in two-temperature multicomponent plasmas in zero magnetic field. Simplifications due to the small electron mass are systematically exploited. A general expression is derived for the ambipolar electric field E. In the special case where the electron and heavy-particle temperatures are equal, this expression reduces to a result previously obtained using a self-consistent effective binary diffusion (SCEBD) approximation [J. D. Ramshaw and C. H. Chang, Plasma Chem. Plasma Process. 11, 395 (1991)]. When thermal diffusion due to electrons is neglected, the heavy particles are shown to diffuse precisely as they would in the same E field if the electrons were entirely removed from the system. Finally, the SCEBD approximation for ambipolar diffusion in multicomponent plasmas is generalized to the case of unequal electron and heavy-particle temperatures. RP RAMSHAW, JD (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 14 TC 50 Z9 50 U1 0 U2 1 PU PLENUM PUBL CORP PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 SN 0272-4324 J9 PLASMA CHEM PLASMA P JI Plasma Chem. Plasma Process. PD SEP PY 1993 VL 13 IS 3 BP 489 EP 498 DI 10.1007/BF01465878 PG 10 WC Engineering, Chemical; Physics, Applied; Physics, Fluids & Plasmas SC Engineering; Physics GA MA438 UT WOS:A1993MA43800008 ER PT J AU HAWLEY, SL AF HAWLEY, SL TI MAGNETIC ACTIVITY IN LOW-MASS STARS SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC LA English DT Article; Proceedings Paper CT 2ND HUBBLE FELLOWS SYMP CY NOV 09-11, 1992 CL SPACE TELESCOPE SCI INST, BALTIMORE, MD HO SPACE TELESCOPE SCI INST ID M-DWARF STARS; MAIN-SEQUENCE STARS; X-RAY-EMISSION; FLARE STARS; CHROMOSPHERIC ACTIVITY; MODEL CHROMOSPHERES; LUMINOSITY FUNCTION; STELLAR; ROTATION; ATMOSPHERES AB The manifestations of magnetic activity in low-mass stars, particularly M dwarfs, can be used as a tool to study their evolution, the operation of the interior dynamo with changing interior conditions, and the structure of their outer atmospheres. Extensive background material on the current understanding of low-mass stellar activity is presented. Two new surveys are described which will greatly increase the number of active low-mass stars known in the field and in nearby open clusters. These surveys will define the characteristics of the activity in low-mass stars, and how the activity changes with a number of parameters of interest, including mass, effective temperature, and age. The data will also allow a rigorous determination of a possible age-activity relation among the low-mass M dwarfs. Theoretical models of M dwarf atmospheres, and their connection to the understanding of the observations, are also discussed. RP HAWLEY, SL (reprint author), LAWRENCE LIVERMORE NATL LAB,INST GEOPHYS & PLANETARY PHYS,MAIL CODE L-413,LIVERMORE,CA 94551, USA. NR 38 TC 9 Z9 9 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 SN 0004-6280 J9 PUBL ASTRON SOC PAC JI Publ. Astron. Soc. Pac. PD SEP PY 1993 VL 105 IS 691 BP 955 EP 960 DI 10.1086/133262 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA LY652 UT WOS:A1993LY65200012 ER PT J AU CASSIS, B TIKHOMIROV, O WAGNER, BA AF CASSIS, B TIKHOMIROV, O WAGNER, BA TI ASYMPTOTIC SOLUTION FOR NONLINEAR CHEMICAL-VAPOR-DEPOSITION PROBLEMS SO QUARTERLY OF APPLIED MATHEMATICS LA English DT Article AB The problem of chemical vapor deposition involving reaction kinetics of any order n at a heated substrate is considered. The deposition process is then described by a convective diffusion equation, coupled to nonlinear boundary conditions, describing the chemical reaction taking place at the heated substrate, where the nonlinearity is given in terms of the order n of the reaction kinetics. We derive boundary layer equations and use a combination of perturbation and similarity methods to find the deposition rate along the susceptor. C1 MOSCOW MV LOMONOSOV STATE UNIV,MOSCOW,RUSSIA. LOS ALAMOS NATL LAB,CTR NONLINEAR STUDIES,LOS ALAMOS,NM 87544. RP CASSIS, B (reprint author), RENSSELAER POLYTECH INST,TROY,NY 12181, USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU AMER MATHEMATICAL SOC PI PROVIDENCE PA 201 CHARLES ST, PROVIDENCE, RI 02940-2213 SN 0033-569X J9 Q APPL MATH JI Q. Appl. Math. PD SEP PY 1993 VL 51 IS 3 BP 585 EP 597 PG 13 WC Mathematics, Applied SC Mathematics GA LV745 UT WOS:A1993LV74500012 ER PT J AU HOLROYD, RA PRESES, JM HANSON, JC AF HOLROYD, RA PRESES, JM HANSON, JC TI THE LINEAR-ENERGY-TRANSFER DEPENDENCE OF EXCITED SINGLET-STATE LIFETIMES OF HYDROCARBON LIQUIDS EXPOSED TO X-RAYS SO RADIATION RESEARCH LA English DT Article ID FREE-ION YIELDS; CYCLOHEXANE; FLUORESCENCE; RADIOLYSIS RP HOLROYD, RA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA. RI Hanson, jonathan/E-3517-2010 NR 16 TC 5 Z9 5 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD SEP PY 1993 VL 135 IS 3 BP 312 EP 314 DI 10.2307/3578869 PG 3 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA MA351 UT WOS:A1993MA35100004 PM 8397427 ER PT J AU MORRIS, MD JONES, TD YOUNG, RW AF MORRIS, MD JONES, TD YOUNG, RW TI A CELL-KINETICS MODEL OF RADIATION-INDUCED MYELOPOIESIS - RATE COEFFICIENT ESTIMATES FOR MOUSE, RAT, SHEEP, SWINE, DOG, AND BURRO IRRADIATED BY PHOTONS SO RADIATION RESEARCH LA English DT Article ID BONE-MARROW; PROGENITOR CELLS; X-IRRADIATION; EXPOSURE; INVITRO C1 OAK RIDGE NATL LAB,DIV HLTH & SAFETY RES,OAK RIDGE,TN 37831. DEF NUCL AGCY,RADIAT POLICY OFF,ARLINGTON,VA 22310. RP MORRIS, MD (reprint author), OAK RIDGE NATL LAB,DIV ENGN PHYS & MATH,POB 2008,OAK RIDGE,TN 37831, USA. NR 39 TC 12 Z9 12 U1 0 U2 0 PU RADIATION RESEARCH SOC PI OAK BROOK PA 2021 SPRING RD, STE 600, OAK BROOK, IL 60521 SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD SEP PY 1993 VL 135 IS 3 BP 320 EP 331 DI 10.2307/3578871 PG 12 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA MA351 UT WOS:A1993MA35100006 PM 8043048 ER PT J AU CHEN, KC WARNE, LK AF CHEN, KC WARNE, LK TI UNIFORM FORMULAS FOR INFINITE ANTENNA CURRENT SO RADIO SCIENCE LA English DT Article ID ASYMPTOTIC EXPANSIONS; CYLINDRICAL-ANTENNA; TRANSIENT AB A uniform asymptotic expansion of the time-harmonic antenna current with large parameter In [2kz/(ka)2] is given. As usual, the expansion s based on Hallen's filament integral and is restricted by the condition z >> a but is otherwise uniform in kz. The use of averaging leads to the vanishing of the second term of the asymptotic series. Two different averaging procedures are used to derive two accurate formulas: The first one, which is very simple, is useful for practical applications. The second formula is of theoretical interest. An improved asymptotic series for large kz is derived to relate the averaging results to existing asymptomic results. Comparison of these two formulas and the exact antenna integral demonstrates that these formulas are more accurate than any other existing formulas for infinite cylindrical antenna current The Hallen filament integral is found to approximate closely the exact integral even when the condition z >> a is violated. Discrepancies in the literature are discussed. RP CHEN, KC (reprint author), SANDIA NATL LABS,DEPT 2753,POB 5800,ALBUQUERQUE,NM 87185, USA. NR 42 TC 2 Z9 2 U1 0 U2 0 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0048-6604 J9 RADIO SCI JI Radio Sci. PD SEP-OCT PY 1993 VL 28 IS 5 BP 649 EP 661 DI 10.1029/93RS01438 PG 13 WC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications SC Astronomy & Astrophysics; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Remote Sensing; Telecommunications GA MC134 UT WOS:A1993MC13400001 ER PT J AU STEMMLER, EA HETTICH, RL HURST, GB BUCHANAN, MV AF STEMMLER, EA HETTICH, RL HURST, GB BUCHANAN, MV TI MATRIX-ASSISTED LASER-DESORPTION IONIZATION FOURIER-TRANSFORM MASS-SPECTROMETRY OF OLIGODEOXYRIBONUCLEOTIDES SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID SEQUENCE-ANALYSIS; OLIGONUCLEOTIDES; BIOMOLECULES; IONS; ABLATION; ACIDS AB Conditions for the matrix-assisted laser desorption/ionization (MALDI) of oligodeoxyribonucleotides at 355 nm, developed using a 3-Tesla Fourier-transform ion cyclotron resonance mass spectrometer (FTMS), are reported. Efficient ion trapping and matrix selection are critical to the desorption and detection of oligonucleotides by FTMS. The achievable upper mass limit for the MALDI-FTMS of biomolecules on our 3-Tesla system has been extended from approximately 2 kDa to 6 kDa through the use of pulsed-trapping-plate ion deceleration techniques. By implementing the deceleration techniques, molecular ions for bovine insulin (MW = 5733.5), an oligodeoxythymidylic acid, pd[T]10 (MW = 3060.0), and a mixed-base 12-mer (MW = 3611.5) have been measured. For the analysis of oligonucleotides by FTMS, selection of an appropriate MALDI matrix is essential for the generation of [M-H]- ions. 3-Hydroxypicolinic acid provides a significant improvement over 2,5-dihydroxybenzoic acid for production of deprotonated molecules particularly for mixed-base oligomers. MALDI studies using FTMS have been duplicated using a newly constructed time-of-flight mass spectrometer (TOFMS) and oligonucleotide fragmentation on the TOFMS is reduced relative to that observed by FTMS. This may be a consequence of the longer times (milliseconds) required for FTMS detection. C1 OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831. BOWDOIN COLL,DEPT CHEM,BRUNSWICK,ME 04011. RI Hettich, Robert/N-1458-2016; Buchanan, Michelle/J-1562-2016 OI Hettich, Robert/0000-0001-7708-786X; Buchanan, Michelle/0000-0002-8078-4575 NR 39 TC 47 Z9 47 U1 0 U2 1 PU JOHN WILEY & SONS LTD PI W SUSSEX PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PD SEP PY 1993 VL 7 IS 9 BP 828 EP 836 DI 10.1002/rcm.1290070910 PG 9 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA LY231 UT WOS:A1993LY23100009 PM 8219323 ER PT J AU HONEA, RB PEPLIES, RW FLOYD, CL AF HONEA, RB PEPLIES, RW FLOYD, CL TI PEOPLE, PHOTOS, AND THE PAST - SUPPORTING GLOBAL CHANGE RESEARCH WITH HISTORICAL IMAGERY SO RESEARCH & EXPLORATION LA English DT Editorial Material C1 E TENNESSEE STATE UNIV,JOHNSON CITY,TN 37601. COMMUN & INFORMAT TECHNOL INC,KNOXVILLE,TN 37931. RP HONEA, RB (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU NATL GEOGRAPHIC SOC PI WASHINGTON PA 17TH AND M STS NW, WASHINGTON, DC 20036 SN 8755-724X J9 RES EXPLOR JI Res. Explor. PD FAL PY 1993 VL 9 IS 4 BP 397 EP 399 PG 3 WC Multidisciplinary Sciences SC Science & Technology - Other Topics GA ML921 UT WOS:A1993ML92100002 ER PT J AU PAUL, SF FONCK, RJ MACAULAY, AK AF PAUL, SF FONCK, RJ MACAULAY, AK TI USING A FREESTANDING THERMISTOR ARRAY TO MEASURE VUV EMISSION FROM A TOKAMAK PLASMA SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID BOLOMETER; RADIATION AB A compact 15-channel bolometer array composed of discrete thermistors has been installed on the Princeton Beta Experiment tokamak. The response time, fastest for detectors with low thermal capacities, has been optimized by using ''free-standing'' detectors. The detector is supported only by thin electrical leads and no thermal substrate is employed. Overheating due to limited heat dissipation is controlled with careful detector biasing. The sensitivity is limited by the systematic errors in the model of the heat transfer from the detector to the electrodes and leads. A two-pole cooling model was found to characterize the detector's thermal decay far better than a simple exponential and resulted in an NEP almost-equal-to 3 X 10(-7) W/square root Hz with a 300-Hz bandwidth. RP PAUL, SF (reprint author), PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08543, USA. NR 12 TC 6 Z9 6 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD SEP PY 1993 VL 64 IS 9 BP 2423 EP 2427 DI 10.1063/1.1143899 PG 5 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA LX891 UT WOS:A1993LX89100001 ER PT J AU BELL, JD HARRIS, JH DUNLAP, JL CROCKER, NA PARE, VK AF BELL, JD HARRIS, JH DUNLAP, JL CROCKER, NA PARE, VK TI SIGNAL ANALYSIS OF FLUCTUATIONS IN TOROIDAL FUSION PLASMAS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ATF TORSATRON; 2ND STABILITY; EDGE PLASMA; TOKAMAK; SYSTEM AB Spectral-based signal-processing techniques for characterizing fluctuation data from plasma discharges in the Advanced Toroidal Facility fusion experiment are described. The analysis process moves from wave form display and spectral analysis of single discharges to coherence filtering and database techniques for identifying coherent fluctuations. These analysis techniques are used to distill large volumes of spectral data from many signals per discharge (for many discharges) into simple forms suitable for comparison with the global variation of plasma parameters. RP BELL, JD (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 26 TC 5 Z9 5 U1 0 U2 1 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD SEP PY 1993 VL 64 IS 9 BP 2428 EP 2433 DI 10.1063/1.1143900 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA LX891 UT WOS:A1993LX89100002 ER PT J AU TUSZEWSKI, M ZWEBEN, SJ AF TUSZEWSKI, M ZWEBEN, SJ TI SCINTILLATOR STUDIES WITH MEV CHARGED-PARTICLE BEAMS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID TFTR; CATHODOLUMINESCENCE; CALIBRATION; SATURATION; DETECTORS; PHOSPHOR; ZNS AB Thin scintillators used as detectors of escaping fusion products in the TFTR to ama are studied with Van de Graaf beams of 3-MeV protons and 3.5-MeV alphas. ZnS scintillators are found generally adequate for the D-D experiments performed up to now, marginal for near-term D-T experiments because the emitted light saturates at alpha fluxes greater than 10(10) CM-2 S-1, and totally inadequate for future ignited plasmas. Other scintillators have been tested that have lower light efficiencies but much better properties at high fluxes. In particular, the P46 scintillator appears to be an excellent choice for future experiments. C1 PRINCETON PLASMA PHYS LAB,PRINCETON,NJ 08544. RP TUSZEWSKI, M (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 25 TC 9 Z9 9 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD SEP PY 1993 VL 64 IS 9 BP 2459 EP 2465 DI 10.1063/1.1143904 PG 7 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA LX891 UT WOS:A1993LX89100006 ER PT J AU NASH, T NOACK, D FILUK, AB AF NASH, T NOACK, D FILUK, AB TI NANOSECOND TIME-RESOLVED VACUUM-ULTRAVIOLET SPECTROMETER FOR ION DIODE SPECTROSCOPY SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article AB A 1-m normal incidence spectrometer has been modified for use as a diagnostic of ion diode plasmas. To improve instrumental sensitivity, an elliptical mirror images an anode surface plasma onto the entrance slit of an f/10 normal incidence spectrometer. The detector is a time-resolving copper iodide coated microchannel plate stripline framing camera with 60-mum resolution, limiting instrumental resolution to 1 angstrom with a 600 l/mm grating in first order. Reflectivity of optics and photoelectron efficiency limit the spectral range from 400 to 2000 angstrom. With a 600-l/mm grating the detector spans a 600-angstrom range. Applications of the instrument may include ion source divergence measurements from Doppler broadening, electric field measurements from Stark splittings or shifts, electron temperature from mean ionization state, and magnetic field measurements on high-power Z pinches from Zeeman splitting. RP NASH, T (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 10 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 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD SEP PY 1993 VL 64 IS 9 BP 2493 EP 2495 DI 10.1063/1.1143909 PG 3 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA LX891 UT WOS:A1993LX89100011 ER PT J AU ALARIE, JP VO-DINH, T MILLER, G ERICSON, MN EASTWOOD, D LIDBERG, R DOMINGUEZ, M AF ALARIE, JP VO-DINH, T MILLER, G ERICSON, MN EASTWOOD, D LIDBERG, R DOMINGUEZ, M TI DEVELOPMENT OF A BATTERY-OPERATED PORTABLE SYNCHRONOUS LUMINESCENCE SPECTROFLUOROMETER SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID OPTIC BASED SENSOR; REMOTE DETECTION; FLUORESCENCE; ORGANOCHLORIDES; SPECTROMETRY AB A battery-operated portable synchronous luminescence spectrofluorometer was developed for on-site analysis of groundwater or hazardous waste sites. The instrument is capable of either emission, excitation, or synchronous fluorescence measurements. The instrument is suited for trace analysis of important pollutants such as polyaromatic hydrocarbons, creosotes, and polychlorinated biphenyls in complex mixtures. The ability to perform synchronous luminescence measurements on these samples can reduce the complexity of fluorescence spectra and help in rapid field site characterization. A description of the instrumental components is given and an evaluation of the instrument using anthracene and several oil samples is provided to illustrate the usefulness of the instrument. C1 OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA. LOCKHEED ENVIRONM SYST & TECHNOL CO, LAS VEGAS, NV 89119 USA. NR 14 TC 25 Z9 25 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD SEP PY 1993 VL 64 IS 9 BP 2541 EP 2546 DI 10.1063/1.1143916 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA LX891 UT WOS:A1993LX89100018 ER PT J AU REICH, T HUSSAIN, Z MOLER, E BLACKWELL, M KAINDL, G SHIRLEY, DA HOWELLS, MR AF REICH, T HUSSAIN, Z MOLER, E BLACKWELL, M KAINDL, G SHIRLEY, DA HOWELLS, MR TI HIGH-RESOLUTION IN THE SOFT-X-RAY RANGE FROM A TOROIDAL GRATING MONOCHROMATOR SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID RADIATION AB A resolving power, E/DELTAE, of greater-than-or-equal-to 13 000 has been achieved with the modified 6 m/160-degrees toroidal grating monochromator (TGM) installed on Beam Line 8-1 at the Stanford Synchrotron Radiation Laboratory. The resolving power of the TGM was increased by replacing the entrance and exit slits with high-precision slits, masking the horizontal part (short radius) of the grating, and improving the TGM scanning mechanisms. To determine the performance of the monochromator, we measured the dependences of resolution and photon flux on the entrance- and exit-slit widths, the exit-slit position, and the masking of the grating. The monochromator resolution in the energy range of 25-65 eV was derived from photoionization measurements of extremely narrow core-excitation resonances in He and Ne. With 10-mum vertical entrance- and exit-slit widths and 32% mask opening of the grating, the monochromator has a resolution (full-width at half maximum) of 5.0+/-0.7 meV at a photon energy of 64.5 eV and a flux of 2 X 10(7) photons/s/100 mA. The results suggest a simple procedure for converting a TGM with moderate resolution into a high-resolution monochromator with a moderate reduction in photon flux due to masking the grating, beyond the reduction attributable to the slit widths. C1 PENN STATE UNIV,UNIV PK,PA 16802. FREE UNIV BERLIN,INST EXPTL PHYS,W-1000 BERLIN 33,GERMANY. RP REICH, T (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. RI Reich, Tobias/C-7064-2016 OI Reich, Tobias/0000-0002-5600-3951 NR 16 TC 3 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD SEP PY 1993 VL 64 IS 9 BP 2552 EP 2557 DI 10.1063/1.1143866 PG 6 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA LX891 UT WOS:A1993LX89100021 ER PT J AU BRUNCO, DP KITTL, JA OTIS, CE GOODWIN, PM THOMPSON, MO AZIZ, MJ AF BRUNCO, DP KITTL, JA OTIS, CE GOODWIN, PM THOMPSON, MO AZIZ, MJ TI TIME-RESOLVED TEMPERATURE-MEASUREMENTS DURING PULSED-LASER IRRADIATION USING THIN-FILM METAL THERMOMETERS SO REVIEW OF SCIENTIFIC INSTRUMENTS LA English DT Article ID ABLATION; SILICON AB In this article, we describe a technique using NiSi and Pt thin film metal thermometers to provide accurate temperature information on a nanosecond time scale during pulsed laser processing of materials. A surface layer of interest is deposited onto the thermometer layer, and temperatures are determined from temperature dependent changes in the metal film's resistance. Details concerning the design and fabrication of the device structure and experimental considerations in making nanosecond resolved resistance measurements are discussed. Simple analytical estimates are presented to extract quantities such as incident laser energy stored in the sample. Finally, transient temperature data in the thermometer film, in combination with heat flow calculations, allow temperature determination as a function of time and depth into the sample and, additionally, can provide information about material properties of the surface layer. C1 HARVARD UNIV,DIV APPL SCI,CAMBRIDGE,MA 02138. IBM CORP,THOMAS J WATSON RES CTR,YORKTOWN HTS,NY 10598. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP BRUNCO, DP (reprint author), CORNELL UNIV,DEPT MAT SCI & ENGN,ITHACA,NY 14853, USA. RI Kittl, Jorge/L-7196-2016; OI Thompson, Michael/0000-0002-4933-009X NR 20 TC 17 Z9 18 U1 0 U2 6 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0034-6748 J9 REV SCI INSTRUM JI Rev. Sci. Instrum. PD SEP PY 1993 VL 64 IS 9 BP 2615 EP 2623 DI 10.1063/1.1143879 PG 9 WC Instruments & Instrumentation; Physics, Applied SC Instruments & Instrumentation; Physics GA LX891 UT WOS:A1993LX89100036 ER PT J AU LOMELI, EC DACAL, A ORTIZ, ME DELCAMPO, JG KIM, H KOROLIJA, M SHAPIRA, D AF LOMELI, EC DACAL, A ORTIZ, ME DELCAMPO, JG KIM, H KOROLIJA, M SHAPIRA, D TI LIGHT PARTICLES EMITTED IN COINCIDENCE WITH EVAPORATION RESIDUES IN BR-79 (930 MEV)+AL-27 COLLISIONS SO REVISTA MEXICANA DE FISICA LA English DT Article; Proceedings Paper CT 16TH SYMP ON NUCLEAR PHYSICS CY JAN 05-08, 1993 CL OAXTEPEC, MEXICO SP ACAD INVESTIGAC CIENT, INT CTR THEORET PHYS, IST FISICA, INST NACL INVESTIGAC NUCL, CTR LATINO AMER FIS, DIRECC GEN ASUNTOS PERSONAL ACAD, CONSEJO SISTEMA INVESTIGAC TECNOL ID NUCLEAR AB Evaporation residues and light particles produced in the reaction Br-79 (930 MeV) + Al-27 were measured in coincidence. Comparisons with detailed predictions of the Statistical Hausser-Feshbach model were performed. Deviations from the model were found specially in the shape of the energy spectra of alpha particles, suggesting anomalously low emission barriers. C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. RP LOMELI, EC (reprint author), UNIV NACL AUTONOMA MEXICO,INST FIS,APARTADO POSTAL 20-364,A OBREGO,MEXICO CITY 01000,DF,MEXICO. NR 8 TC 0 Z9 0 U1 0 U2 0 PU SOCIEDAD MEXICANA DE FISICA PI COYOACAN PA APARTADO POSTAL 70-348, COYOACAN 04511, MEXICO SN 0035-001X J9 REV MEX FIS JI Rev. Mex. Fis. PD SEP PY 1993 VL 39 SU 2 BP 49 EP 55 PG 7 WC Physics, Multidisciplinary SC Physics GA MB476 UT WOS:A1993MB47600007 ER PT J AU DAVIDS, CN BACK, B BEARDEN, IG BINDRA, K BINGHAM, CR BRODA, R CARPENTER, MP CHUNG, W DALY, PJ FORNAL, B GRABOWSKI, ZW HENDERSON, DJ HENRY, RG JANSSENS, RVF KHOO, TL LAURITSEN, T LIANG, Y MAYER, RH MOLTZ, DM NISIUS, D RAMAYYA, AV ROBERTSON, JD SCARLASSARA, F SORAMEL, F SPOLAORE, P TOTH, KS WALTERS, WB AF DAVIDS, CN BACK, B BEARDEN, IG BINDRA, K BINGHAM, CR BRODA, R CARPENTER, MP CHUNG, W DALY, PJ FORNAL, B GRABOWSKI, ZW HENDERSON, DJ HENRY, RG JANSSENS, RVF KHOO, TL LAURITSEN, T LIANG, Y MAYER, RH MOLTZ, DM NISIUS, D RAMAYYA, AV ROBERTSON, JD SCARLASSARA, F SORAMEL, F SPOLAORE, P TOTH, KS WALTERS, WB TI EXPERIMENTS USING THE ARGONNE FRAGMENT MASS ANALYZER SO REVISTA MEXICANA DE FISICA LA English DT Article; Proceedings Paper CT 16TH SYMP ON NUCLEAR PHYSICS CY JAN 05-08, 1993 CL OAXTEPEC, MEXICO SP ACAD INVESTIGAC CIENT, INT CTR THEORET PHYS, IST FISICA, INST NACL INVESTIGAC NUCL, CTR LATINO AMER FIS, DIRECC GEN ASUNTOS PERSONAL ACAD, CONSEJO SISTEMA INVESTIGAC TECNOL AB The Fragment Mass Analyzer (FMA) at the ATLAS accelerator has been operational for about one year. During that period a number of test runs and experiments have been carried out. The test runs have verified that the ion optics of the FMA are essentially as calculated. A brief facility description is followed by recent experimental results. C1 VANDERBILT UNIV,NASHVILLE,TN 37240. INST NUCL PHYS,PL-31342 KRAKOW,POLAND. LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. PURDUE UNIV,W LAFAYETTE,IN 47907. UNIV TENNESSEE,KNOXVILLE,TN 37996. UNIV NOTRE DAME,S BEND,IN. UNIV KENTUCKY,LEXINGTON,KY 40506. UNIV MARYLAND,COLL PK,MD 20742. LEGNARO NATL LAB,LEGNANO,ITALY. RP DAVIDS, CN (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. RI Bearden, Ian/M-4504-2014; Carpenter, Michael/E-4287-2015 OI Bearden, Ian/0000-0003-2784-3094; Carpenter, Michael/0000-0002-3237-5734 NR 6 TC 0 Z9 0 U1 0 U2 0 PU SOCIEDAD MEXICANA DE FISICA PI COYOACAN PA APARTADO POSTAL 70-348, COYOACAN 04511, MEXICO SN 0035-001X J9 REV MEX FIS JI Rev. Mex. Fis. PD SEP PY 1993 VL 39 SU 2 BP 56 EP 63 PG 8 WC Physics, Multidisciplinary SC Physics GA MB476 UT WOS:A1993MB47600008 ER PT J AU LEE, IY AF LEE, IY TI HIGH-SPIN PROPERTIES FROM THE STUDY OF CONTINUUM GAMMA-RAYS SO REVISTA MEXICANA DE FISICA LA English DT Article; Proceedings Paper CT 16TH SYMP ON NUCLEAR PHYSICS CY JAN 05-08, 1993 CL OAXTEPEC, MEXICO SP ACAD INVESTIGAC CIENT, INT CTR THEORET PHYS, IST FISICA, INST NACL INVESTIGAC NUCL, CTR LATINO AMER FIS, DIRECC GEN ASUNTOS PERSONAL ACAD, CONSEJO SISTEMA INVESTIGAC TECNOL ID LIFETIME MEASUREMENTS; STATES; NUCLEI; YB-166 AB A quantitative analysis has been carried out on the two-dimensional energy correlation of the continuum gamma rays in 170Hf. The results indicate the existance of at least two widths in the gammaray energy distribution: a narrow width of about 20 keV, most likely originating from decay along different discrete bands near the yrast line and a wide width of about 200 keV from mixed states at higher excitation energy. Lifetimes of states associated with the narrow width were measured by the Doppler-shift attenuation method. The results indicate a reduction of the collectivity associated with gamma-rays with energy from 0.7 to 0.9 MeV and an enhancement of collectivity for those above 0.9 MeV. These observations were interpreted as due to the effect of rotational damping and rotational-induced nuclear shape change. RP LEE, IY (reprint author), LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU SOCIEDAD MEXICANA DE FISICA PI COYOACAN PA APARTADO POSTAL 70-348, COYOACAN 04511, MEXICO SN 0035-001X J9 REV MEX FIS JI Rev. Mex. Fis. PD SEP PY 1993 VL 39 SU 2 BP 153 EP 161 PG 9 WC Physics, Multidisciplinary SC Physics GA MB476 UT WOS:A1993MB47600018 ER PT J AU LESKO, KT CHAN, YD GARCIA, A NORMAN, EB SMITH, AR STOKSTAD, RG ZLIMEN, I EVANS, HC EWAN, GT HALLIN, A LEE, HW LESLIE, JR MACARTHUR, JD MAK, HB MCDONALD, AB MCLATCHIE, W ROBERTSON, BC SKENSVED, P BONVIN, E EARLE, ED HEPBURN, D MILTON, GM SUR, B BLEVIS, I DAVIDSON, WF HARGROVE, CK MES, H SHATKAY, M SINCLAIR, D CARTER, AL HOLLEBONE, B KESSLER, D JAGAM, P LAW, J OLLERHEAD, RW SIMPSON, JJ WANG, JX BIGU, J HALLMAN, ED HAQ, RU VIRTUE, C GIL, S WALTHAM, C LOWRY, MM BEIER, EW FRATI, W NEWCOMER, M VANBERG, R BOWLES, TJ DOE, P FOWLER, MM HIME, A MCGIRT, F ROBERTSON, RGH SPENCER, TC VIEIRA, DJ WILHEMY, JB WILKERSON, JF WOUTERS, JM TANNER, NW JELLEY, NA BARTON, JC DOUCAS, G HOOPER, EW KNOX, AB MOORHEAD, ME OMORI, M TRENT, PT WARK, DL AF LESKO, KT CHAN, YD GARCIA, A NORMAN, EB SMITH, AR STOKSTAD, RG ZLIMEN, I EVANS, HC EWAN, GT HALLIN, A LEE, HW LESLIE, JR MACARTHUR, JD MAK, HB MCDONALD, AB MCLATCHIE, W ROBERTSON, BC SKENSVED, P BONVIN, E EARLE, ED HEPBURN, D MILTON, GM SUR, B BLEVIS, I DAVIDSON, WF HARGROVE, CK MES, H SHATKAY, M SINCLAIR, D CARTER, AL HOLLEBONE, B KESSLER, D JAGAM, P LAW, J OLLERHEAD, RW SIMPSON, JJ WANG, JX BIGU, J HALLMAN, ED HAQ, RU VIRTUE, C GIL, S WALTHAM, C LOWRY, MM BEIER, EW FRATI, W NEWCOMER, M VANBERG, R BOWLES, TJ DOE, P FOWLER, MM HIME, A MCGIRT, F ROBERTSON, RGH SPENCER, TC VIEIRA, DJ WILHEMY, JB WILKERSON, JF WOUTERS, JM TANNER, NW JELLEY, NA BARTON, JC DOUCAS, G HOOPER, EW KNOX, AB MOORHEAD, ME OMORI, M TRENT, PT WARK, DL TI THE SUDBURY NEUTRINO OBSERVATORY SO REVISTA MEXICANA DE FISICA LA English DT Article; Proceedings Paper CT 16TH SYMP ON NUCLEAR PHYSICS CY JAN 05-08, 1993 CL OAXTEPEC, MEXICO SP ACAD INVESTIGAC CIENT, INT CTR THEORET PHYS, IST FISICA, INST NACL INVESTIGAC NUCL, CTR LATINO AMER FIS, DIRECC GEN ASUNTOS PERSONAL ACAD, CONSEJO SISTEMA INVESTIGAC TECNOL ID OSCILLATIONS; MATTER AB The solar neutrino problem and a number of different solutions to this problem are outlined. A description of the Sudbury Neutrino Observatory, where the necessary information to decide which solution is correct, is given. C1 QUEENS UNIV,DEPT PHYS,KINGSTON K7L 9N6,ON,CANADA. AECL RES,CHALK RIVER LABS,CHALK RIVER K0J 1J0,ON,CANADA. CARLETON UNIV,CTR RES PARTICLE PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA. CARLETON UNIV,DEPT PHYS,OTTAWA K1S 5B6,ONTARIO,CANADA. UNIV GUELPH,DEPT PHYS,GUELPH N1G 2W1,ONTARIO,CANADA. LAURENTIAN UNIV,DEPT PHYS,SUDBURY P3E 2C6,ONTARIO,CANADA. UNIV BRITISH COLUMBIA,DEPT PHYS,VANCOUVER V6T 1W5,BC,CANADA. PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08544. UNIV PENN,DEPT PHYS,PHILADELPHIA,PA 19104. LOS ALAMOS NATL LAB,DIV PHYS,LOS ALAMOS,NM 87545. UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND. RP LESKO, KT (reprint author), LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720, USA. NR 15 TC 0 Z9 0 U1 0 U2 1 PU SOCIEDAD MEXICANA DE FISICA PI COYOACAN PA APARTADO POSTAL 70-348, COYOACAN 04511, MEXICO SN 0035-001X J9 REV MEX FIS JI Rev. Mex. Fis. PD SEP PY 1993 VL 39 SU 2 BP 162 EP 168 PG 7 WC Physics, Multidisciplinary SC Physics GA MB476 UT WOS:A1993MB47600019 ER PT J AU RAMAN, S AF RAMAN, S TI GLOBAL SYSTEMATICS OF B(E20(1)+-]2(1)+) VALUES FOR SR-ISOTOPE, XE-ISOTOPE, BA-ISOTOPE, AND ND-ISOTOPE SO REVISTA MEXICANA DE FISICA LA English DT Article; Proceedings Paper CT 16TH SYMP ON NUCLEAR PHYSICS CY JAN 05-08, 1993 CL OAXTEPEC, MEXICO SP ACAD INVESTIGAC CIENT, INT CTR THEORET PHYS, IST FISICA, INST NACL INVESTIGAC NUCL, CTR LATINO AMER FIS, DIRECC GEN ASUNTOS PERSONAL ACAD, CONSEJO SISTEMA INVESTIGAC TECNOL ID EVEN-EVEN NUCLEI; LIFETIME MEASUREMENTS; REGION; STATE AB Newly measured B(E2; 0(1)+ --> 2(1)+) values for the isotopes of Sr, Ba, and Nd are fully consistent with the global systematics. There are some indications, however, that those for the light Xe isotopes may not conform to these systematics. RP RAMAN, S (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 22 TC 2 Z9 2 U1 0 U2 0 PU SOCIEDAD MEXICANA DE FISICA PI COYOACAN PA APARTADO POSTAL 70-348, COYOACAN 04511, MEXICO SN 0035-001X J9 REV MEX FIS JI Rev. Mex. Fis. PD SEP PY 1993 VL 39 SU 2 BP 201 EP 205 PG 5 WC Physics, Multidisciplinary SC Physics GA MB476 UT WOS:A1993MB47600023 ER PT J AU HANSMA, HG SINSHEIMER, RL GROPPE, J BRUICE, TC ELINGS, V GURLEY, G BEZANILLA, M MASTRANGELO, IA HOUGH, PVC HANSMA, PK AF HANSMA, HG SINSHEIMER, RL GROPPE, J BRUICE, TC ELINGS, V GURLEY, G BEZANILLA, M MASTRANGELO, IA HOUGH, PVC HANSMA, PK TI RECENT ADVANCES IN ATOMIC-FORCE MICROSCOPY OF DNA SO SCANNING LA English DT Article DE AFM; ATOMIC FORCE MICROSCOPE; DNA; MICA; TAPPING MODE; DNA-PROTEIN COMPLEXES; PHIX-174 VIRION DNA; GENE 32 PROTEIN ID SCANNING TUNNELING MICROSCOPY; ELECTRON-MICROSCOPY; KINETOPLAST DNA; MOLECULES; RECONSTRUCTION; SURFACE; STRANDS; AIR AB Three advances involving DNA in atomic force microscopy (AFM) are reported here. First a HEPES-Mg buffer has been used that improves the spreading of DNA and provides good DNA coverage with as little as 200-500 picograms per sample. Second, the new ''tapping'' mode has been used to improve the ease and resolution of AFM-imaging of DNA in air. Finally, AFM images are presented of single-stranded Phi Chi-174 virion DNA with the gene 32 single-stranded binding protein. A summary of the current state of the field and of the methods for preparing and imaging DNA in the AFM is also presented. C1 UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106. UNIV CALIF SANTA BARBARA,DEPT BIOL SCI,SANTA BARBARA,CA 93106. UNIV CALIF SANTA BARBARA,DEPT CHEM,SANTA BARBARA,CA 93106. DIGITAL INSTRUMENTS INC,SANTA BARBARA,CA. BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973. NR 33 TC 116 Z9 118 U1 4 U2 20 PU FAMS INC PI MAHWAH PA BOX 832, MAHWAH, NJ 07430 SN 0161-0457 J9 SCANNING JI Scanning PD SEP-OCT PY 1993 VL 15 IS 5 BP 296 EP 299 PG 4 WC Instruments & Instrumentation; Microscopy SC Instruments & Instrumentation; Microscopy GA MD920 UT WOS:A1993MD92000008 PM 8269178 ER PT J AU VISWANATHAN, S SHELTON, BR WRIGHT, JK SIKKA, VK AF VISWANATHAN, S SHELTON, BR WRIGHT, JK SIKKA, VK TI EFFECT OF THERMOMECHANICAL PROCESSING ON THE ROOM-TEMPERATURE TENSILE PROPERTIES OF AN FE3AL-BASED ALLOY SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. RP VISWANATHAN, S (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831, USA. OI Wright, Jill/0000-0001-8909-8144 NR 6 TC 12 Z9 12 U1 0 U2 2 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 SEP 1 PY 1993 VL 29 IS 5 BP 589 EP 594 DI 10.1016/0956-716X(93)90401-D PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA LN279 UT WOS:A1993LN27900004 ER PT J AU JONES, DA JANKOWSKI, AF AF JONES, DA JANKOWSKI, AF TI ANODICALLY ENHANCED DIFFUSION IN CU/AG THIN-FILM COUPLES SO SCRIPTA METALLURGICA ET MATERIALIA LA English DT Article C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP JONES, DA (reprint author), UNIV NEVADA,RENO,NV 89557, USA. NR 5 TC 10 Z9 10 U1 0 U2 1 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 SEP 1 PY 1993 VL 29 IS 5 BP 701 EP 706 DI 10.1016/0956-716X(93)90422-O PG 6 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Materials Science; Metallurgy & Metallurgical Engineering GA LN279 UT WOS:A1993LN27900025 ER PT J AU LEHMAN, RF AF LEHMAN, RF TI A NORTH-KOREAN NUCLEAR-WEAPONS PROGRAM - INTERNATIONAL IMPLICATIONS SO SECURITY DIALOGUE LA English DT Article RP LEHMAN, RF (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA. NR 1 TC 2 Z9 2 U1 0 U2 0 PU SAGE PUBLICATIONS LTD PI LONDON PA 6 BONHILL STREET, LONDON, ENGLAND EC2A 4PU SN 0967-0106 J9 SECUR DIALOGUE JI Secur. Dialogue PD SEP PY 1993 VL 24 IS 3 BP 257 EP 272 DI 10.1177/0967010693024003003 PG 16 WC International Relations SC International Relations GA LZ398 UT WOS:A1993LZ39800002 ER PT J AU NG, EG PEYTON, BW AF NG, EG PEYTON, BW TI BLOCK SPARSE CHOLESKY ALGORITHMS ON ADVANCED UNIPROCESSOR COMPUTERS SO SIAM JOURNAL ON SCIENTIFIC COMPUTING LA English DT Article DE SPARSE LINEAR SYSTEMS; CHOLESKY FACTORIZATION; SUPERNODES; BLOCK ALGORITHMS; ADVANCED COMPUTER ARCHITECTURES ID MULTIFRONTAL METHOD; FACTORIZATION; ELIMINATION AB As with many other linear algebra algorithms, devising a portable implementation of sparse Cholesky factorization that performs well on the broad range of computer architectures currently available is a formidable challenge. Even after limiting the attention to machines with only one processor, as has been done in this paper, there are still several interesting issues to consider. For dense matrices, it is well known that block factorization algorithms are the best means of achieving this goal. This approach is taken for sparse factorization as well. This paper has two primary goals. First, two sparse Cholesky factorization algorithms, the multifrontal method and a blocked left-looking sparse Cholesky method, are examined in a systematic and consistent fashion, both to illustrate the strengths of the blocking techniques in general and to obtain a fair evaluation of the two approaches. Second, the impact of various implementation techniques on time and storage efficiency is assessed, paying particularly close attention to the work-storage requirement of the two methods and their variants. RP NG, EG (reprint author), OAK RIDGE NATL LAB,MATH SCI SECT,POB 2008,OAK RIDGE,TN 37831, USA. NR 32 TC 125 Z9 128 U1 0 U2 3 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 1064-8275 J9 SIAM J SCI COMPUT JI SIAM J. Sci. Comput. PD SEP PY 1993 VL 14 IS 5 BP 1034 EP 1056 DI 10.1137/0914063 PG 23 WC Mathematics, Applied SC Mathematics GA LU288 UT WOS:A1993LU28800003 ER PT J AU CAI, ZQ GOLDSTEIN, CI PASCIAK, JE AF CAI, ZQ GOLDSTEIN, CI PASCIAK, JE TI MULTILEVEL ITERATION FOR MIXED FINITE-ELEMENT SYSTEMS WITH PENALTY SO SIAM JOURNAL ON SCIENTIFIC COMPUTING LA English DT Article DE MIXED APPROXIMATION OF ELLIPTIC BOUNDARY VALUE PROBLEMS; MULTIGRID TECHNIQUES; MULTILEVEL; PRECONDITIONERS; HIERARCHICAL PRECONDITIONERS ID MULTIGRID ALGORITHMS; SPACES AB In this paper, the authors consider the solution of the discrete systems that arises when a mixed finite element approach is used to approximate the solution of second-order elliptic boundary value problems. By the introduction of a penalty parameter, these equations can be approximated by the solution of a symmetric and positive definite penalty system on the velocity subspace. Iterative procedures are developed and analyzed for this penalty system based on the hierarchical basis approach as well as on the standard multigrid approach. Finally, numerical experiments are presented that illustrate the convergence behavior suggested by the theory. C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. RP CAI, ZQ (reprint author), UNIV SO CALIF,DEPT MATH,LOS ANGELES,CA 90089, USA. NR 24 TC 24 Z9 24 U1 0 U2 1 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 1064-8275 J9 SIAM J SCI COMPUT JI SIAM J. Sci. Comput. PD SEP PY 1993 VL 14 IS 5 BP 1072 EP 1088 DI 10.1137/0914065 PG 17 WC Mathematics, Applied SC Mathematics GA LU288 UT WOS:A1993LU28800005 ER PT J AU TUMINARO, RS WOMBLE, DE AF TUMINARO, RS WOMBLE, DE TI ANALYSIS OF THE MULTIGRID FMV CYCLE ON LARGE-SCALE PARALLEL MACHINES SO SIAM JOURNAL ON SCIENTIFIC COMPUTING LA English DT Article DE PARALLEL COMPUTING; MULTIGRID; FMV CYCLE AB On serial computers it is well known that the multigrid FMV cycle is preferable to the V cycle both asymptotically and in practical use over a wide range of applications. However, on massively parallel machines, the parallel efficiency of the FMV (full multigrid V cycle) scheme is noticeably lower than that of the V cycle due to a large percentage of time spent on coarse grids. Thus the question arises: are the additional coarse grid computations within the FMV cycle warranted on massively parallel machines? To answer this, a number of issues are addressed regarding parallel FMV cycles: what efficiencies can be achieved; how do these compare with V cycle efficiencies; are FMV cycles still preferable to V cycles in a massively parallel environment? A model is used to analyze the efficiency of both FMV and V cycles as a function of relaxation efficiency. Using this model, the standard FMV grid-switching criterion is modified to incorporate the efficiency of the coarse grid processing. Numerical results obtained from a multigrid implementation on a 1024-processor nCUBE 2 are used in conjunction with the model to quantify the performance and efficiency of the FMV cycle. Finally, comments are made regarding limitations of parallel processors based on FMV efficiencies. RP TUMINARO, RS (reprint author), SANDIA NATL LABS,DIV APPL & NUMER MATH,ALBUQUERQUE,NM 87185, USA. NR 14 TC 3 Z9 4 U1 0 U2 0 PU SIAM PUBLICATIONS PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 SN 1064-8275 J9 SIAM J SCI COMPUT JI SIAM J. Sci. Comput. PD SEP PY 1993 VL 14 IS 5 BP 1159 EP 1173 DI 10.1137/0914069 PG 15 WC Mathematics, Applied SC Mathematics GA LU288 UT WOS:A1993LU28800009 ER PT J AU HAMILTON, MA WESTERMANN, DT JAMES, DW AF HAMILTON, MA WESTERMANN, DT JAMES, DW TI FACTORS AFFECTING ZINC UPTAKE IN CROPPING SYSTEMS SO SOIL SCIENCE SOCIETY OF AMERICA JOURNAL LA English DT Article ID VESICULAR-ARBUSCULAR MYCORRHIZAE; PHOSPHORUS; INFECTION; PLANTS; ROOTS; DTPA AB Zinc availabilities can change with different cropping management practices. The objective of this study was to identify some of the causative factors associated with previous crops contributing to Zn uptake differences in a subsequent crop. Field studies over 3 yr evaluated the Zn availability after four precropping treatments: bean (Phaseolus vulgaris L.), corn (Zea mays L.), wheat (Triticum aestivum L.), and fallow, across two Zn fertilization rates (with and without 11 kg Zn ha(-l) as ZnSO4), using the 'Viva' bean as a test crop. Soil samples taken before and after the test crop were analyzed for extractable P, Zn, Cu, Mn, and Fe, and organic matter. Soil respiration during the test crop was periodically estimated the last cropping year. Whole plant samples estimated nutrient concentration and uptake. Soil Zn extracted by diethylenetriaminepentaacetic acid (DTPA) was increased by Zn fertilization but not affected by precropping treatments. Zinc uptake by bean was significantly higher after precropping with corn and lower after fallow regardless of Zn fertilization. Uptake differences were most pronounced during early plant growth. Phosphorus and Cu uptake varied with treatment in a similar pattern as Zn uptake, and were positively correlated with each other. Zinc up. take was also positively correlated with soil organic matter and negatively correlated with soil P. Soil respiration rate was significantly lower after the fallow treatment compared with other precropping treatments. Vesicular-arbuscular mycorrhiza (VAM) colonization in the test crop roots was higher after corn and lower after fallow regardless of soil Zn concentrations. Colonization was positively cor-related with Zn, P, and Cu uptake during early plant growth. The VAM colonization, soil respiration, and DTPA-extractable Zn were selected by a stepwise regression procedure as the important variables affecting Zn uptake during early plant growth. These results emphasize the importance of the soil's biological activities on Zn availability and may help explain some field observations where chemical soil tests appear to fail. C1 USDA ARS,SOIL & WATER MANAGEMENT RES UNIT,KIMBERLY,ID 83341. UTAH STATE UNIV,DEPT PLANTS SOILS & BIOMETEOROL,LOGAN,UT 84322. RP HAMILTON, MA (reprint author), EG&G IDAHO INC,IDAHO NATL ENGN LAB,POB 1625,IDAHO FALLS,ID 83415, USA. NR 34 TC 23 Z9 23 U1 1 U2 2 PU SOIL SCI SOC AMER PI MADISON PA 677 SOUTH SEGOE ROAD, MADISON, WI 53711 SN 0361-5995 J9 SOIL SCI SOC AM J JI Soil Sci. Soc. Am. J. PD SEP-OCT PY 1993 VL 57 IS 5 BP 1310 EP 1315 PG 6 WC Soil Science SC Agriculture GA ME793 UT WOS:A1993ME79300026 ER PT J AU MCNEILL, JD HARRIS, CB AF MCNEILL, JD HARRIS, CB TI AN EXACT PHASE-SHIFT MODEL FOR IMAGE STATES ON METAL-SURFACES WITH ALKALI-METAL OVERLAYERS SO SOLID STATE COMMUNICATIONS LA English DT Article ID NA OVERLAYERS; PHOTOEMISSION; ELECTRONS; CU(111) AB Within the framework of multiple reflection theory, an exact solution is developed for image and surface states on a nearly-free-electron metal with a flat adlayer potential. Wave function matching conditions are used to determine the round-trip phase shift at a given energy, and a Bohr-like quantization condition is applied to determine bound state energies. Also, a model is developed for determining the effective mass of image state electrons in the presence of an adlayer. Binding energies obtained from two-photon photoemission experiments on Na/Cu(111) are in excellent agreement with the computed results. C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720. RI McNeill, Jason/E-5389-2011 NR 17 TC 4 Z9 4 U1 1 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0038-1098 J9 SOLID STATE COMMUN JI Solid State Commun. PD SEP PY 1993 VL 87 IS 12 BP 1089 EP 1092 DI 10.1016/0038-1098(93)90805-W PG 4 WC Physics, Condensed Matter SC Physics GA MB305 UT WOS:A1993MB30500001 ER PT J AU WATSON, CH WRONKA, J LAUKIEN, FH BARSHICK, CM EYLER, JR AF WATSON, CH WRONKA, J LAUKIEN, FH BARSHICK, CM EYLER, JR TI ULTRAHIGH MASS RESOLUTION GLOW-DISCHARGE MASS-SPECTROMETRY - DIRECT ANALYSIS OF HEAVY ISOTOPE MIXTURES SO SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY LA English DT Note C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV FLORIDA,DEPT CHEM,GAINESVILLE,FL 32611. RP WATSON, CH (reprint author), BRUKER INSTRUMENTS INC,MANNING PK,BILLERICA,MA 01821, USA. NR 9 TC 12 Z9 12 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0584-8547 J9 SPECTROCHIM ACTA B JI Spectroc. Acta Pt. B-Atom. Spectr. PD SEP PY 1993 VL 48 IS 11 BP 1445 EP 1448 DI 10.1016/0584-8547(93)80131-D PG 4 WC Spectroscopy SC Spectroscopy GA LY701 UT WOS:A1993LY70100012 ER PT J AU CRONKITE, E BULLIS, J HONIKEL, L AF CRONKITE, E BULLIS, J HONIKEL, L TI PARTIAL AMELIORATION OF AZT-INDUCED MACROCYTIC ANEMIA IN THE MOUSE BY FOLIC-ACID SO STEM CELLS LA English DT Article DE AZT; ANEMIA, MACROCYTIC; MICE; FOLATE THERAPY; FOLIC ACID; AIDS; ANEMIA ID AIDS-RELATED COMPLEX; ACQUIRED-IMMUNODEFICIENCY-SYNDROME; COLONY-STIMULATING FACTOR; TOXICITY; 3'-AZIDO-3'-DEOXYTHYMIDINE; AZIDOTHYMIDINE; ZIDOVUDINE AB CBA/Ca mice being maintained on azidothymidine (AZT) in drinking water were given vitamin B-12 and folate in an effort to ameliorate the macrocytic anemia associated with AZT administration. The B-12/folate regimen was ineffectual, but higher doses of folate given daily resulted in an increase in RBC and a decrease in mean corpuscular hemoglobin (MCH) and polychromatophilic erythrocytes (PCE) while mean corpuscular volume (MCV) remained relatively constant. The implications of these findings on RBC production and hemoglobin synthesis are discussed. RP CRONKITE, E (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA. FU NHLBI NIH HHS [R01 HL 42115-05] NR 16 TC 0 Z9 0 U1 0 U2 0 PU ALPHAMED PRESS PI DAYTON PA 4100 S KETTERING BLVD, DAYTON, OH 45439-2092 SN 1066-5099 J9 STEM CELLS JI Stem Cells PD SEP PY 1993 VL 11 IS 5 BP 393 EP 397 PG 5 WC Cell & Tissue Engineering; Biotechnology & Applied Microbiology; Oncology; Cell Biology; Hematology SC Cell Biology; Biotechnology & Applied Microbiology; Oncology; Hematology GA LY744 UT WOS:A1993LY74400005 PM 8241950 ER PT J AU CHEN, N BIONDO, AC DORRIS, SE GORETTA, KC LANAGAN, MT YOUNGDAHL, CA POEPPEL, RB AF CHEN, N BIONDO, AC DORRIS, SE GORETTA, KC LANAGAN, MT YOUNGDAHL, CA POEPPEL, RB TI SINTER-FORGED (BI, PB)2SR2CA2CU3OX SUPERCONDUCTORS SO SUPERCONDUCTOR SCIENCE & TECHNOLOGY LA English DT Article ID CA-CU-O; BI2SR2CACU2OX; TEXTURE; TAPES AB Dense (Bi, Pb)2 Sr2Ca2Cu3Ox bars were fabricated by sinter forging. The bars were highly phase-pure and exhibited strong textures in which the c axes of the platelike grains were preferentially aligned parallel to the pressing direction. Transport critical current densities increased with texture, reaching a maximum of 8 x 10(3) A cm-2 at 77 K in a self-field. Optimal processing in air occurred at 845-850-degrees-C. C1 ARGONNE NATL LAB,DIV MAT & COMPONENTS TECHNOL,ARGONNE,IL 60439. RP CHEN, N (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 25 TC 45 Z9 45 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-2048 J9 SUPERCOND SCI TECH JI Supercond. Sci. Technol. PD SEP PY 1993 VL 6 IS 9 BP 674 EP 677 DI 10.1088/0953-2048/6/9/005 PG 4 WC Physics, Applied; Physics, Condensed Matter SC Physics GA LZ924 UT WOS:A1993LZ92400005 ER PT J AU PERKINS, LS DEPRISTO, AE AF PERKINS, LS DEPRISTO, AE TI SELF-DIFFUSION MECHANISMS FOR ADATOMS ON FCC(100) SURFACES SO SURFACE SCIENCE LA English DT Article ID CORRECTED EFFECTIVE-MEDIUM; ATOMIC EXCHANGE MECHANISM; MOLECULAR-DYNAMICS; IR(110) SURFACES; SINGLE ADATOMS; METAL-SURFACES; REACTION-PATH; IR; CLUSTERS; NI AB We investigate the mechanisms and associated energetics of diffusion for the Ni/Ni(100), Cu/Cu(100), Pd/Pd(100) and Ag/Ag(100) systems using the corrected effective medium method. The Ni/Ni(100) and Cu/Cu(100) systems are shown to favor the atomic-exchange diffusion mechanism whereas the Pd/Pd(100) and Ag/Ag(100) systems favor the bridge-hopping diffusion mechanism. The explicit inclusion of the kinetic-exchange-correlation energy is critical to determination of the favored mechanism. A simple model, based upon binding ''curves'' from dimer and bulk binding, is developed to provide a physical explanation of the different behavior exhibited by the various metal systems. C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011. IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011. NR 62 TC 61 Z9 61 U1 1 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 SEP 1 PY 1993 VL 294 IS 1-2 BP 67 EP 77 DI 10.1016/0039-6028(93)90159-H PG 11 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LV864 UT WOS:A1993LV86400012 ER PT J AU THUNDAT, T ZHENG, XY CHEN, GY WARMACK, RJ AF THUNDAT, T ZHENG, XY CHEN, GY WARMACK, RJ TI ROLE OF RELATIVE-HUMIDITY IN ATOMIC-FORCE MICROSCOPY IMAGING SO SURFACE SCIENCE LA English DT Letter ID DNA; MOLECULES; AIR; AFM AB Atomic force microscope images were found to be influenced significantly by relative humidity. Higher relative humidity produces higher adhesion forces and reduced resolution. Atomic resolution on mica was abruptly lost when the relative humidity was slowly decreased while scanning. This effect could be reversed by increasing the relative humidity or by increasing the cantilever force. At higher relative humidities the lateral force on the tip was found to increase significantly with increasing scanning speed. RP THUNDAT, T (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA. NR 20 TC 94 Z9 94 U1 0 U2 16 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0039-6028 J9 SURF SCI JI Surf. Sci. PD SEP 1 PY 1993 VL 294 IS 1-2 BP L939 EP L943 PG 5 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA LV864 UT WOS:A1993LV86400005 ER PT J AU FRIEDMAN, P FERRIS, KF ALLEN, LC AF FRIEDMAN, P FERRIS, KF ALLEN, LC TI THEORETICAL INVESTIGATIONS OF THE MOLECULAR AND VIBRATIONAL STRUCTURE OF DIVINYL SULFONE SO THEOCHEM-JOURNAL OF MOLECULAR STRUCTURE LA English DT Article ID VALENCE BASIS-SETS; ORBITAL METHODS; ELEMENTS AB Ab initio molecular orbital calculations were performed at the SCF and MBPT(2) levels in order to determine the molecular and vibrational structure of divinyl sulfone, and the interactions determining its geometric preferences. Vibrational frequency analysis was used to correlate published infrared and Raman frequency results in terms of isomeric stability. Electronic structure calculations point to the C2 isomer being the more stable, with a stabilization energy of about 0.5 kcal mol-1 over the C(S) form. The C1 conformation lies considerably higher in energy, and lacks the essential electrostatic stabilization found in the C2 and C(S) structures. C1 PACIFIC NW LAB, DEPT MAT, RICHLAND, WA 99352 USA. PRATT INST, DEPT MATH & SCI, BROOKLYN, NY 11205 USA. PRINCETON UNIV, DEPT CHEM, PRINCETON, NJ 08544 USA. NR 12 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0166-1280 J9 THEOCHEM-J MOL STRUC JI Theochem-J. Mol. Struct. PD SEP PY 1993 VL 104 IS 1 BP 17 EP 26 PG 10 WC Chemistry, Physical SC Chemistry GA MB740 UT WOS:A1993MB74000002 ER PT J AU DEANGELIS, DL SHUTER, BJ RIDGWAY, MS SCHEFFER, M AF DEANGELIS, DL SHUTER, BJ RIDGWAY, MS SCHEFFER, M TI MODELING GROWTH AND SURVIVAL IN AN AGE-0 FISH COHORT SO TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY LA English DT Article ID YOUNG MIGRATORY TROUT; INDIVIDUAL-BASED MODEL; SMALLMOUTH BASS; POPULATION REGULATION; SALMO-TRUTTA; TERRITORIAL BEHAVIOR; MECHANISMS; SIZE; DENSITY; LARVAL AB We applied an individual-based model to an age-0 cohort of smallmouth bass Micropterus dolomieu to simulate the cohort's growth and survivorship through its first growing season. The purpose was to determine whether the stock-recruitment characteristics of the age-0 fish could be predicted. The model smallmouth bass were exposed to size-dependent predation, size-independent mortality, and starvation mortality resulting from depletion of their prey supply. Survivorship curves were produced by model simulations. When survivorship at a given time was plotted against initial egg density during the early growing season, the curve resembled the peaked pattern of a Ricker-type curve. In contrast, curves for survivorship during the late growing season had no noticeable peak or maximum. Other results showed (1) strong density dependence of the mortality rate early in the growing season and density independence late in the growing season; (2) a distinct critical time (CT) during which the slope of the survivorship curve changed from a steep to a shallow decline, and (3) a decrease in CT as a function of the initial egg density. Competition for and overexploitation of prey during the early growing season produced these results. The model simulation results resembled patterns of some empirical data. C1 ONTARIO MINIST NAT RESOURCES,FISHERIES RES BRANCH,MAPLE L6A 1S9,ON,CANADA. INST INLAND WATER MANAGEMENT & WASTE WATER TREATMENT,8200 AA LELYSTAD,NETHERLANDS. RP DEANGELIS, DL (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Shuter, Brian/A-3991-2008; Scheffer, Marten/C-1852-2012 NR 33 TC 30 Z9 31 U1 2 U2 21 PU AMER FISHERIES SOC PI BETHESDA PA 5410 GROSVENOR LANE SUITE 110, BETHESDA, MD 20814-2199 SN 0002-8487 J9 T AM FISH SOC JI Trans. Am. Fish. Soc. PD SEP PY 1993 VL 122 IS 5 BP 927 EP 941 DI 10.1577/1548-8659(1993)122<0927:MGASIA>2.3.CO;2 PG 15 WC Fisheries SC Fisheries GA MJ440 UT WOS:A1993MJ44000023 ER PT J AU AZIZ, A NGUYEN, H AF AZIZ, A NGUYEN, H TI 2-DIMENSIONAL PERFORMANCE OF CONVECTING-RADIATING FINS OF DIFFERENT PROFILE SHAPES SO WARME UND STOFFUBERTRAGUNG-THERMO AND FLUID DYNAMICS LA English DT Article AB A finite element approach is used to investigate the two-dimensional performance of convecting-radiating fins of rectangular, trapezoidal, triangular, and concave parabolic shapes. The heat transfer rate depends on fin size parameter alpha, Biot number Bi, radiation-conduction parameter N(r), and environment temperatures theta(infinity) and theta(r). Numerical results for the heat transfer rate and the error due to one-dimensional assumption are presented and discussed for each geometry. The highest heat dissipation is achieved with the concave parabolic shape and the lowest with the rectangular shape with the trapezoidal and triangular shapes falling in between. The maximum error of +144 percent is noted for a short and thick rectangular fin (alpha = 1) and -47 percent for a long thin triangular fin (alpha = 20). C1 EE&G IDAHO INC, IDAHO NATL ENGN LAB, IDAHO FALLS, ID 83415 USA. RP GONZAGA UNIV, DEPT MECH ENGN, SPOKANE, WA 99258 USA. NR 13 TC 19 Z9 19 U1 1 U2 1 PU SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0042-9929 J9 WARME STOFFUBERTRAG PD SEP PY 1993 VL 28 IS 8 BP 481 EP 487 DI 10.1007/BF01539679 PG 7 WC Thermodynamics; Mechanics SC Thermodynamics; Mechanics GA MB235 UT WOS:A1993MB23500006 ER PT J AU FONTAINE, TA TODD, DE AF FONTAINE, TA TODD, DE TI MEASURING EVAPORATION WITH CERAMIC BELLANI PLATE ATMOMETERS SO WATER RESOURCES BULLETIN LA English DT Article DE EVAPOTRANSPIRATION; SURFACE WATER HYDROLOGY; METEOROLOGY; IRRIGATION ID WATER-BALANCE; EVAPOTRANSPIRATION; SIMULATION; FOREST; SOIL AB Ceramic atmometers were tested to determine their usefulness for measuring evaporation in water resources applications. Field experiments were used to evaluate the precision, responsiveness to a range of potential evaporation conditions in a forested catchment, and interpretation of water loss of Bellani plate atmometers. The experiments, conducted from April to October in a warm, humid climate in the southeastern United States, indicate that atmometers can be reliable monitoring instruments for estimating potential evaporation. The small size, portability, low internal thermal mass, low cost, and ability to integrate the effect of radiation, air temperature, humidity and windspeed into one direct measurement of potential evaporation, make atmometers a useful instrument for certain water resources applications. RP FONTAINE, TA (reprint author), OAK RIDGE NATL LAB,RES STAFF,POB 2008,OAK RIDGE,TN 37831, USA. NR 26 TC 2 Z9 2 U1 0 U2 2 PU AMER WATER RESOURCES ASSOC PI HERNDON PA 950 HERNDON PARKWAY SUITE 300, HERNDON, VA 20170-5531 SN 0043-1370 J9 WATER RESOUR BULL JI Water Resour. Bull. PD SEP-OCT PY 1993 VL 29 IS 5 BP 785 EP 795 PG 11 WC Engineering, Civil; Geosciences, Multidisciplinary; Water Resources SC Engineering; Geology; Water Resources GA ML383 UT WOS:A1993ML38300007 ER PT J AU SOLOMON, DK SCHIFF, SL POREDA, RJ CLARKE, WB AF SOLOMON, DK SCHIFF, SL POREDA, RJ CLARKE, WB TI A VALIDATION OF THE H-3/HE-3 METHOD FOR DETERMINING GROUNDWATER RECHARGE SO WATER RESOURCES RESEARCH LA English DT Article ID TRITIUM; HE-3; HELIUM; WATER; SEAWATER AB Tritium and He isotopes have been measured at a site where groundwater flow is nearly vertical for a travel time of 100 years and where recharge rates are spatially variable. Because the mid-1960s H-3 peak (arising from aboveground testing of thermonuclear devices) is well-defined, the vertical groundwater velocity is known with unusual accuracy at this site. Utilizing H-3 and its stable daughter He-3 to determine groundwater ages, we compute a recharge rate of 0.16 m/yr, which agrees to within about 5% of the value based on the depth of the H-3 peak (measured both in 1986 and 1991) and two-dimensional modeling in an area of high recharge. Zero H-3/He-3 age occurs at a depth that is approximately equal to the average depth of the annual low water table, even though the capillary fringe extends to land surface during most of the year at the study site. In an area of low recharge (0.05 m/yr) where the H-3 peak (and hence the vertical velocity) is also well-defined, the H-3/He-3 results could not be used to compute recharge because samples were not collected sufficiently far above the 3H peak; however, modeling indicates that the H-3/He-3 age gradient near the water table is an accurate measure of vertical velocities in the low-recharge area. Because H-3 and He-3 have different diffusion coefficients, and because the amount of mechanical mixing is different in the area of high recharge than in the low-recharge area, we have separated the dispersive effects of mechanical mixing from molecular diffusion. We estimate a longitudinal dispersivity of 0.07 m and effective diffusion coefficients for H-3 ((HHO)-H-3)) and He-3 of 2.4 x 10(-5) and 1.3 x 10(-4) m/day, respectively. Although the 3H/3He age gradient is an excellent indicator of vertical groundwater velocities above the mid-1960s 3H peak, dispersive mixing and diffusive loss of He-3 perturb the age gradient near and below the H-3 peak. C1 UNIV WATERLOO,WATERLOO CTR GROUNDWATER RES,WATERLOO N2L 3G1,ONTARIO,CANADA. UNIV ROCHESTER,DEPT GEOL SCI,ROCHESTER,NY 14627. MCMASTER UNIV,DEPT PHYS,HAMILTON L8S 4L8,ONTARIO,CANADA. RP SOLOMON, DK (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA. RI Solomon, Douglas/C-7951-2016 OI Solomon, Douglas/0000-0001-6370-7124 NR 26 TC 76 Z9 78 U1 0 U2 9 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD SEP PY 1993 VL 29 IS 9 BP 2951 EP 2962 DI 10.1029/93WR00968 PG 12 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA LW057 UT WOS:A1993LW05700001 ER PT J AU SOLL, WE CELIA, MA WILSON, JL AF SOLL, WE CELIA, MA WILSON, JL TI MICROMODEL STUDIES OF 3-FLUID POROUS-MEDIA SYSTEMS - PORE-SCALE PROCESSES RELATING TO CAPILLARY-PRESSURE SATURATION RELATIONSHIPS SO WATER RESOURCES RESEARCH LA English DT Article ID DISPLACEMENT; WETTABILITY; FLOW AB An experimental approach to study physical processes affecting fluid behavior in three-fluid porous media systems was designed and implemented. These experiments were designed to provide quantitative evidence of important pore-scale displacement processes. A unique experimental approach using a two-dimensional synthetic porous medium (micromodel) and digital image analysis (DIA) enabled both measurement of three-fluid capillary pressure-saturation relationships and analysis of fluid behavior at the pore level. Experiments were pressure controlled, and were designed to mimic measurements typically performed on laboratory cores. Only quasi-static measurements were made, with a focus on capillary pressure-saturation relations. Different orders of fluid infiltration with respect to wettability were studied. DIA made it possible to obtain quantitative information about the experiments, including fluid saturations, saturation changes between pressure steps, and movement of apparently isolated fluids through films. The results provide insights into important pore-scale mechanisms and provide a basis for three-fluid pore-scale computations. C1 PRINCETON UNIV,DEPT CIVIL ENGN,PRINCETON,NJ 08544. NEW MEXICO INST MIN & TECHNOL,DEPT GEOSCI,SOCORRO,NM 87801. RP SOLL, WE (reprint author), LOS ALAMOS NATL LAB,MAIL STOP F665,LOS ALAMOS,NM 87545, USA. NR 29 TC 65 Z9 66 U1 0 U2 6 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD SEP PY 1993 VL 29 IS 9 BP 2963 EP 2974 DI 10.1029/93WR00524 PG 12 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA LW057 UT WOS:A1993LW05700002 ER PT J AU SHVIDLER, MI AF SHVIDLER, MI TI CORRELATION MODEL OF TRANSPORT IN RANDOM-FIELDS SO WATER RESOURCES RESEARCH LA English DT Article ID SOLUTE TRANSPORT; GROUNDWATER; FLOW AB This paper is an investigation of the correlation model for transport of nonreactive solutes in media with random porosity and permeability. The method of perturbation is used to obtain a second-order approximate, nonlocal (integrodifferential) equation for mean concentration. An approximate method of localization is used to convert to with the same order of approximation differential equations of transport. Exact averaged equations for one-dimensional transport are examined, and the question of the consistency and asymptotic behavior for approximate averaged equations is discussed. A detailed investigation of transport in a stratified system has been carried out. The second moment of concentration is examined, the variance of the concentration is computed, and cross-correlation moments are obtained for fields of porosity and velocity, including solute concentration. RP SHVIDLER, MI (reprint author), LAWRENCE BERKELEY LAB,DIV EARTH SCI,1 CYCLOTRON RD,BERKELEY,CA 94720, USA. NR 23 TC 25 Z9 25 U1 0 U2 1 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 SN 0043-1397 J9 WATER RESOUR RES JI Water Resour. Res. PD SEP PY 1993 VL 29 IS 9 BP 3189 EP 3199 DI 10.1029/93WR01235 PG 11 WC Environmental Sciences; Limnology; Water Resources SC Environmental Sciences & Ecology; Marine & Freshwater Biology; Water Resources GA LW057 UT WOS:A1993LW05700023 ER PT J AU KEEFER, DW REUTER, WG SMARTT, HB JOHNSON, JA DAVID, SA AF KEEFER, DW REUTER, WG SMARTT, HB JOHNSON, JA DAVID, SA TI NEEDED - VERIFIED MODELS TO PREDICT THE FRACTURE OF WELDMENTS SO WELDING JOURNAL LA English DT Article C1 MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE,TN. RP KEEFER, DW (reprint author), EG&G IDAHO INC,MET & CERAM CHEM & MAT RES & ENGN GRP,IDAHO FALLS,ID 83401, USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU AMER WELDING SOC PI MIAMI PA PO BOX 351040, MIAMI, FL 33135 SN 0043-2296 J9 WELD J JI Weld. J. PD SEP PY 1993 VL 72 IS 9 BP 73 EP 79 PG 7 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA LV526 UT WOS:A1993LV52600011 ER PT J AU ABREU, P ADAM, W ADYE, T AGASI, E AJINENKO, I ALEKSAN, R ALEKSEEV, GD ALGERI, A ALLEN, P ALMEHED, A 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 BELOKOPYPTOV, 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 GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M 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 DECLERQ, C DEFEZLASO, MDM 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 FENYUK, A 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 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 HAJDUK, Z 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 HOLMES, R 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 KOHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, 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 MATHIS, L 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 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 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 TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E VALLSFERRER, JA 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 WAYNE, M 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, A 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 BELOKOPYPTOV, 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 GIMENEZ, MVC CATTAI, A CAVALLO, FR CERRITO, L CHABAUD, V CHAN, A CHAPKIN, M 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 DECLERQ, C DEFEZLASO, MDM 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 FENYUK, A 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 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 HAJDUK, Z 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 HOLMES, R 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 KOHNE, JH KOENE, B KOKKINIAS, P KORATZINOS, M KORCYL, K KORYTOV, AV KOSTIOUKHINE, V KOURKOUMELIS, C KOUZNETSOV, O KRAMER, PH KROLIKOWSKI, J KRONKVIST, I KRUENERMARQUIS, U KUCEWICZ, 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 MATHIS, L 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 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 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 TURLUER, ML TUUVA, T TYAPKIN, IA TYNDEL, M TZAMARIAS, S UEBERSCHAER, S ULLALAND, O UVAROV, V VALENTI, G VALLAZZA, E VALLSFERRER, JA 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 WAYNE, M 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 D-MESON PRODUCTION IN Z(0) HADRONIC DECAYS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID LUND MONTE-CARLO; E+E ANNIHILATION; CHARMED MESONS; JET FRAGMENTATION; RESONANCE; PHYSICS AB A study of the fragmentation properties of charm and bottom quarks into D mesons is presented. From 263 700 Z0 hadronic decays collected in 1991 with the DELPHI detector at the LEP collider, D0, D+ and D*+ are reconstructed in the modes K- pi+, K- pi+pi+ and D0pi+ followed by D0-->K- pi+, respectively. The fractional decay widths GAMMA(Z0-->D/DXBAR)/GAMMA(h) are determined, and first results are presented for the production of D mesons from ccBAR and bbBAR events separately. The average energy fraction of D*+/- in charm quark fragmentation is found to be [X(E)(D*)]c=0.487+/-0.015 (stat)+/-0.005 (sys.). Assuming that the fraction of D(s) and charm-baryons produced at LEP is similar to that around 10 GeV, the Z0 partial width into charm quark pairs is determined to be GAMMA(c)/GAMMA(h)=0.187+/-0.031 (stat)+/-0.023 (sys). The probability for a b quark to fragment into B(s)BAR or b-baryons is inferred to be 0.268+/-0.094 (stat)+/-0.100 (sys) from the measured probability that it fragments into a B0BAR or B-. 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 UUB,IIHE,B-1050 BRUSSELS,BELGIUM. UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE. UNIV ETAT MONS,FAC SCI,B-7000 MONS,BELGIUM. UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY. UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. INFN,I-40126 BOLOGNA,ITALY. COLL FRANCE,PHYS CORPUSCULAIRE LAB,IN2P3,CNRS,F-75231 PARIS 05,FRANCE. CERN,CH-1211 GENEVA 23,SWITZERLAND. ULP,CTR RECH NUCL,IN2P3,CNRS,F-67037 STRASBOURG,FRANCE. NCSR,INST NUCL PHYS,GR-15310 ATHENS,GREECE. FZU,CAS,INST PHYS,DIV HIGH ENERGY PHYS,CS-18040 PRAGUE 8,CZECHOSLOVAKIA. UNIV GENOA,DIPARTIMENTO FIS,I-16132 GENOA,ITALY. INFN,I-16146 GENOA,ITALY. UNIV GRENOBLE 1,INST SCI NUCL,IN2P3,CNRS,F-38026 GRENOBLE,FRANCE. SEFT,HIGH ENERGY PHYS RES INST,SF-00170 HELSINKI,FINLAND. DUBNA JOINT NUCL RES INST,MOSCOW 101000,RUSSIA. UNIV KARLSRUHE,INST EXPTL KERNPHYS,D-76128 KARLSRUHE 1,GERMANY. 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UNIV OXFORD,DEPT PHYS,OXFORD 0X1 3RH,ENGLAND. UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY. INFN,I-35131 PADUA,ITALY. PONTIFICA UNIV CATHOLICA,DEPT PHYS,BR-22453 RIO 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,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE. UNIV SALERNO,DIPARTIMENTO FIS,I-84100 SALERNO,ITALY. IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY. UNIV CANTABRIA,CSIC,CEAFM,E-39006 SANTANDER,SPAIN. PROTVINO HIGH ENERGY PHYS INST,PROTVINO,RUSSIA. UNIV LJUBLJANA,J STEFAN INST,61000 LJUBLJANA,SLOVENIA. UNIV LJUBLJANA,DEPT PHYS,61000 LJUBLJANA,SLOVENIA. UNIV STOCKHOLM,INST PHYS,S-11346 STOCKHOLM,SWEDEN. UNIV TURIN,DIPARTIMENTO FIS,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. UNIV VALENCIA,DFAMN,E-46100 BURJASSOT,SPAIN. CSIC,IFIC,VALENCIA,SPAIN. AUSTRIAN ACAD SCI,INST HOCHENERGIEPHYS,A-1050 VIENNA,AUSTRIA. INST NUCL STUDIES,PL-00681 WARSAW,POLAND. UNIV WARSAW,PL-00681 WARSAW,POLAND. UNIV WUPPERTAL,FACHBEREICH PHYS,D-42097 WUPPERTAL 1,GERMANY. RP ABREU, P (reprint author), FCUL,IST,LIP,AV ELIAS GARCIA 14 1,P-1000 LISBON,PORTUGAL. RI Botner, Olga/A-9110-2013; Hallgren, Allan/A-8963-2013; 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; 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; 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; 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; 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; Demaria, Natale/0000-0003-0743-9465; Bonesini, Maurizio/0000-0001-5119-1896; Sannino, Mario/0000-0001-7700-8383; 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; 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; 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; Torassa, Ezio/0000-0003-2321-0599 NR 28 TC 41 Z9 41 U1 0 U2 8 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD SEP PY 1993 VL 59 IS 4 BP 533 EP 545 PG 13 WC Physics, Particles & Fields SC Physics GA LX442 UT WOS:A1993LX44200001 ER PT J AU ANTOS, J BEKER, H BRONS, S BUSSMANN, K DAGAN, S DREES, A ERD, C ESTEN, MJ FABJAN, CW GLASSEL, P GOERLACH, U HEDBERG, V LISSAUER, D MAZZONI, MA MCCUBBIN, NA NEUBERT, M NEVSKI, P OLSEN, L PFEIFFER, A RAY, A SCHUKRAFT, J SHAPIRA, D SOLTANI, J SPECHT, HJ STUMER, I THOMPSON, J VEENHOF, RJ WILLIS, WJ WOODY, C AF ANTOS, J BEKER, H BRONS, S BUSSMANN, K DAGAN, S DREES, A ERD, C ESTEN, MJ FABJAN, CW GLASSEL, P GOERLACH, U HEDBERG, V LISSAUER, D MAZZONI, MA MCCUBBIN, NA NEUBERT, M NEVSKI, P OLSEN, L PFEIFFER, A RAY, A SCHUKRAFT, J SHAPIRA, D SOLTANI, J SPECHT, HJ STUMER, I THOMPSON, J VEENHOF, RJ WILLIS, WJ WOODY, C TI SOFT PHOTON PRODUCTION IN 450-GEV/C P-BE COLLISIONS SO ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS LA English DT Article ID LOW TRANSVERSE-MOMENTUM; PI+P INTERACTIONS; PROMPT POSITRONS; GEV-C; K+P AB We have measured the inclusive p(T) spectra of soft photons produced at central and backward rapidities in 450 GeV/c p-Be collisions down to 1 MeV/c in transverse momentum. In the region 1 < p(T) < 20 MeV/c an excess of photons over those expected from hadronic decays is observed. This excess is comparable, within systematic errors, with estimates of direct photons produced via hadronic bremsstrahlung. An upper limit is derived on the presence of additional sources of direct photons at small transverse momentum. C1 BROOKHAVEN NATL LAB,UPTON,NY 11973. UNIV HEIDELBERG,D-69120 HEIDELBERG,GERMANY. MOSCOW PHYS & ENGN INST,MOSCOW 115409,RUSSIA. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV PITTSBURGH,PITTSBURGH,PA 15260. RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND. UNIV LONDON UNIV COLL,LONDON WC1E 6BT,ENGLAND. UNIV TEL AVIV,IL-9978 RAMAT AVIV,ISRAEL. RP ANTOS, J (reprint author), CERN,CH-1211 GENEVA 23,SWITZERLAND. NR 30 TC 17 Z9 17 U1 0 U2 1 PU SPRINGER VERLAG PI NEW YORK PA 175 FIFTH AVE, NEW YORK, NY 10010 SN 0170-9739 J9 Z PHYS C PART FIELDS JI Z. Phys. C-Part. Fields PD SEP PY 1993 VL 59 IS 4 BP 547 EP 553 DI 10.1007/BF01562546 PG 7 WC Physics, Particles & Fields SC Physics GA LX442 UT WOS:A1993LX44200002 ER PT J AU EVANS, BR MARGALIT, R WOODWARD, J AF EVANS, BR MARGALIT, R WOODWARD, J TI ATTACHMENT OF PENTAAMMINERUTHENIUM(III) TO TRICHODERMA-REESEI CELLOBIOHYDROLASE-I INCREASES ITS CATALYTIC ACTIVITY SO BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS LA English DT Article ID PHANEROCHAETE-CHRYSOSPORIUM; CELLOBIOSE OXIDASE; FUNGAL CELLULASES; PURIFICATION; PEROXIDASE; REDUCTION; MYOGLOBIN; OXYGEN C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. JET PROP LAB,PASADENA,CA 91109. NR 25 TC 6 Z9 6 U1 0 U2 0 PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS PI SAN DIEGO PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 SN 0006-291X J9 BIOCHEM BIOPH RES CO JI Biochem. Biophys. Res. Commun. PD AUG 31 PY 1993 VL 195 IS 1 BP 497 EP 503 DI 10.1006/bbrc.1993.2071 PG 7 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA LU459 UT WOS:A1993LU45900072 PM 8363625 ER PT J AU BAKER, GA GRAVESMORRIS, PR AF BAKER, GA GRAVESMORRIS, PR TI RESULTS ON SEQUENCES OF HERMITE-PADE, INTEGRAL APPROXIMANTS SO JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS LA English DT Article DE HERMITE-PADE APPROXIMANT; INTEGRAL APPROXIMANT; DIFFERENTIAL APPROXIMANT; PADE APPROXIMANT; DIFFERENTIAL EQUATIONS AB The convergence of ''horizontal'' sequences of Hermite-Pade, integral approximants is studied by both numerical and theoretical methods. For functions with their nearest singularity of the algebraic type at z = 1 we complement previously proven convergence inside the unit circle by proving divergence outside the unit circle of sequences of the [L/M; 1] type where M remains fixed and L --> infinity. RP BAKER, GA (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,GRP T-11,MS B262,LOS ALAMOS,NM 87545, USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0377-0427 J9 J COMPUT APPL MATH JI J. Comput. Appl. Math. PD AUG 31 PY 1993 VL 47 IS 2 BP 241 EP 252 DI 10.1016/0377-0427(93)90006-W PG 12 WC Mathematics, Applied SC Mathematics GA LZ348 UT WOS:A1993LZ34800006 ER PT J AU HARRIS, MT SCOTT, TC BYERS, CH AF HARRIS, MT SCOTT, TC BYERS, CH TI THE SYNTHESIS OF METAL HYDROUS OXIDE PARTICLES BY MULTIPHASE ELECTRODISPERSION SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT SYMP ON NANOPHASE MATERIALS, AT THE EMRS 1992 FALL MEETING OF THE EUROPEAN-MATERIALS-RESEARCH-SOC CY NOV 03-06, 1992 CL STRASBOURG, FRANCE SP EUROPEAN MAT RES SOC ID SIZE AB A multiphase electrodispersion precipitation reactor called the electric dispersion reactor (EDR) was developed to synthesize ultrafine particles for the production of precursor powders of advanced ceramic materials. A pulsed electric field is employed to create dispersions of micrometer- and submicrometer-scale conducting (aqueous-based) drops in non-conducting (organic) liquids. Species initially dissolved in the organic phase diffuse into the aqueous droplets containing the other reagents. Reaction ensues, leading immediately to precipitation and gelation in the aqueous droplets. The EDR has produced 0.1-5 mum particles of silica, alumina, zirconia, yttria, and composite hydrous oxide particles from metal alkoxide and metal salt precursors. Also considered is the application of the EDR to the control and modification of the morphological characteristics of these particles, with illustrative examples. C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831. NR 15 TC 14 Z9 14 U1 0 U2 1 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 31 PY 1993 VL 168 IS 2 BP 125 EP 129 DI 10.1016/0921-5093(93)90714-P PG 5 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA LY001 UT WOS:A1993LY00100002 ER PT J AU SIEGEL, RW AF SIEGEL, RW TI SYNTHESIS AND PROPERTIES OF NANOPHASE MATERIALS SO MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING LA English DT Article; Proceedings Paper CT SYMP ON NANOPHASE MATERIALS, AT THE EMRS 1992 FALL MEETING OF THE EUROPEAN-MATERIALS-RESEARCH-SOC CY NOV 03-06, 1992 CL STRASBOURG, FRANCE SP EUROPEAN MAT RES SOC ID GAS EVAPORATION TECHNIQUE; NANOCRYSTALLINE PALLADIUM; THERMODYNAMIC PROPERTIES; ULTRAFINE PARTICLES; GRAIN-BOUNDARIES; METAL PARTICLES; TIO2; CLUSTERS; POWDERS; NANOINDENTATION AB Nanophase materials, with their gram sizes or phase dimensions in the nanometer size regime, are now being produced by a wide variety of synthesis and processing methods. The interest in these new ultrafine-grained materials results primarily from the special nature of their various physical, chemical, and mechanical properties and the possibilities of controlling these properties during the synthesis and subsequent processing procedures. Since it is now becoming increasingly apparent that their properties can be engineered effectively during synthesis and processing, and that they can also be produced in quantity, nanophase materials should have considerable potential for technological development in a variety of applications. Some of the recent research on nanophase materials related to their synthesis and properties is briefly reviewed and the future potential of these new materials is considered. RP SIEGEL, RW (reprint author), ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439, USA. NR 74 TC 134 Z9 135 U1 2 U2 14 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 31 PY 1993 VL 168 IS 2 BP 189 EP 197 DI 10.1016/0921-5093(93)90726-U PG 9 WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering GA LY001 UT WOS:A1993LY00100014 ER PT J AU SCHNEIDER, RP BRYAN, RP JONES, ED LOTT, JA AF SCHNEIDER, RP BRYAN, RP JONES, ED LOTT, JA TI EXCITONIC TRANSITIONS IN INGAP/INALGAP STRAINED QUANTUM-WELLS SO APPLIED PHYSICS LETTERS LA English DT Article ID MOLECULAR-BEAM EPITAXY; DOUBLE-HETEROSTRUCTURE; ELASTIC STRAIN; LASER-DIODES; BAND OFFSETS; GROWTH; SPECTROSCOPY; ALGAINP; ALLOYS; GAAS AB Excitonic transitions in metalorganic vapor phase epitaxially grown InxGa1-xP/In0.48(Al0.7Ga0.3)0.52P strained single quantum-well structures are characterized using low-temperature photoluminescence and photoluminescence excitation (PLE) spectroscopies. The structures consist of several uncoupled quantum wells with thicknesses between 1.2 and 11.3 nm, and compositions x of 0.48 (nominally lattice matched) and 0.56 (approximately 0.6% biaxial compressive strain). The photoluminescence spectra exhibit intense peaks over the wavelength range 550-650 nm, with linewidths between 7 and 23 meV depending on the well thickness. The PLE spectra reveal strong heavy-hole and light-hole transitions, as well as higher-order (n=2) transitions in the thicker wells. The heavy-hole/light-hole splitting shows little dependence on well thickness in the strained structures, indicating a relatively large conduction band offset of DELTAE(C) is similar to 0.75DELTAE(G). RP SCHNEIDER, RP (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA. NR 24 TC 15 Z9 15 U1 1 U2 2 PU AMER INST PHYSICS PI WOODBURY PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999 SN 0003-6951 J9 APPL PHYS LETT JI Appl. Phys. Lett. PD AUG 30 PY 1993 VL 63 IS 9 BP 1240 EP 1242 DI 10.1063/1.110772 PG 3 WC Physics, Applied SC Physics GA LU951 UT WOS:A1993LU95100028 ER PT J AU WEI, SH LAKS, DB ZUNGER, A AF WEI, SH LAKS, DB ZUNGER, A TI DEPENDENCE OF THE OPTICAL-PROPERTIES OF SEMICONDUCTOR ALLOYS ON THE DEGREE OF LONG-RANGE ORDER (VOL 62, PG 1937, 1993) SO APPLIED PHYSICS LETTERS LA English DT Correction, Addition RP WEI, SH (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA. NR 1 TC 1 Z9 1 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 30 PY 1993 VL 63 IS 9 BP 1292 EP 1292 DI 10.1063/1.110812 PG 1 WC Physics, Applied SC Physics GA LU951 UT WOS:A1993LU95100047 ER PT J AU MARCINKOWSKI, A RAPAPORT, J FINLAY, RW BRIENT, C HERMAN, M CHADWICK, MB AF MARCINKOWSKI, A RAPAPORT, J FINLAY, RW BRIENT, C HERMAN, M CHADWICK, MB TI NEUTRON EMISSION CROSS-SECTIONS AT LOW BOMBARDING ENERGIES AND THE NOVELTY IN MULTISTEP COMPOUND REACTION MODEL SO NUCLEAR PHYSICS A LA English DT Article DE NUCLEAR REACTIONS HO-165; TA-181(N, XN); E = 6.7, 20 MEV; MEASURED SIGMA (E(N), THETA); DEDUCED REACTION MECHANISM; MODIFIED STATISTICAL MULTISTEP MODEL ANALYSIS ID HOLE STATE DENSITIES; STATISTICAL-THEORY; PRECOMPOUND REACTIONS; ELASTIC-SCATTERING; SPECTRA; BI-209; NB-93 AB Inelastic neutron emission at 6.7 and 20 MeV incident energies has been measured for monoisotopic samples of Ho-165 and Ta-181. Time-of-flight spectra were taken at several angles between 15-degrees and 145-degrees using a beam-swinger spectrometer. The cross sections are averaged over 1 MeV energy bins. The 20 MeV data, when compared with the quantum-mechanical statistical multistep calculations have revealed a magnitude problem in the existing theories. A gradual or ''multistep'' absorption in the entrance channels is proposed as a way out of the difficulty. This modification turns out to be sufficient for an adequate description of the experimental data. C1 SOLTAN INST NUCL STUDIES,PL-00681 WARSAW,POLAND. ENEA,CRE CLEMENTEL,BOLOGNA,ITALY. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551. RP MARCINKOWSKI, A (reprint author), OHIO UNIV,ATHENS,OH 45701, USA. NR 42 TC 35 Z9 35 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0375-9474 J9 NUCL PHYS A JI Nucl. Phys. A PD AUG 30 PY 1993 VL 561 IS 3 BP 387 EP 415 DI 10.1016/0375-9474(93)90018-S PG 29 WC Physics, Nuclear SC Physics GA LY649 UT WOS:A1993LY64900004 ER PT J AU AOKI, S GOCKSCH, A AF AOKI, S GOCKSCH, A TI THE SPECTRUM OF THE KAZAKOV-MIGDAL MODEL SO NUCLEAR PHYSICS B LA English DT Article ID QCD AB Gross has found an exact expression for the density of eigenvalues in the simplest version of the Kazakov-Migdal model of induced QCD. In this paper we compute the spectrum of small fluctuations around Gross' semi-circular solution. By solving Migdal's wave equation we find a string-like spectrum which, in four dimensions, corresponds to the infinite tower of mesons in strong coupling lattice QCD with adjoint matter. In one dimension our formula reproduces correctly the well-known spectrum of the hermitian matrix model with a harmonic oscillator potential. We comment on the relevance of our results to the possibility of the model describing extended objects in more than one dimension. C1 BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973. RP AOKI, S (reprint author), UNIV TSUKUBA,INST PHYS,TSUKUBA,IBARAKI 305,JAPAN. NR 17 TC 4 Z9 4 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 30 PY 1993 VL 404 IS 1-2 BP 173 EP 186 DI 10.1016/0550-3213(93)90477-7 PG 14 WC Physics, Particles & Fields SC Physics GA LU311 UT WOS:A1993LU31100008 ER PT J AU MONTANO, D RIVLIS, G AF MONTANO, D RIVLIS, G TI SOLVING TOPOLOGICAL 2D QUANTUM-GRAVITY USING WARD IDENTITIES SO NUCLEAR PHYSICS B LA English DT Article ID FIELD-THEORIES; STRINGS; MODELS; CONSTRAINTS; EQUATIONS AB A topological procedure for computing correlation functions for any (1, q) model is presented. Our procedure can be used to compute any correlation function on the sphere as well as some correlation functions at higher genus. We derive new and simpler recursion relations that extend previously known results based on W-constraints. In addition, we compute an effective contact algebra with multiple contacts that extends Verlindes' algebra. Computational techniques based on the KdV approach are developed and used to compute the same correlation functions. A simple and elegant proof of the puncture equation derived directly from the KdV equations is included. We hope that this approach can lead to a deeper understanding of D = 1 quantum gravity and non-critical string theory. C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720. RP MONTANO, D (reprint author), CALTECH,PASADENA,CA 91125, USA. NR 24 TC 1 Z9 1 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 30 PY 1993 VL 404 IS 1-2 BP 483 EP 513 DI 10.1016/0550-3213(93)90488-B PG 31 WC Physics, Particles & Fields SC Physics GA LU311 UT WOS:A1993LU31100019 ER PT J AU SCHAFFNER, J DOVER, CB GAL, A GREINER, C STOCKER, H AF SCHAFFNER, J DOVER, CB GAL, A GREINER, C STOCKER, H TI STRANGE HADRONIC MATTER SO PHYSICAL REVIEW LETTERS LA English DT Article ID EXCHANGE-POTENTIAL APPROACH; BARYON-BARYON SCATTERING; HEAVY-ION COLLISIONS; LAMBDA-HYPERNUCLEI; NUCLEON-SCATTERING; DROPLETS; STARS AB In an extended mean field theory, we find a large class of bound multistrange objects, formed from combinations of {p, n, LAMBDA, XI0, XI-} baryons, which are stable against strong decay. We predict a maximal binding energy per baryon of E(B)/A almost-equal-to -21 MeV, strangeness per baryon f(s) almost-equal-to 1-1.2, charge per baryon f(q) almost-equal-to -0.1 to 0, and baryon density 2.5-3 times that of ordinary nuclei. For A greater-than-or-equal-to 6, we obtain stable combinations involving only {LAMBDA, XI0, XI-} hyperons. C1 UNIV FRANKFURT,INST THEORET PHYS,W-6000 FRANKFURT 1,GERMANY. BROOKHAVEN NATL LAB,UPTON,NY 11973. HEBREW UNIV JERUSALEM,RACAH INST PHYS,IL-91904 JERUSALEM,ISRAEL. DUKE UNIV,DEPT PHYS,DURHAM,NC 27706. RP SCHAFFNER, J (reprint author), UNIV WASHINGTON,NATL INST NUCL THEORY,SEATTLE,WA 98195, USA. RI Stoecker, Horst/D-6173-2013 OI Stoecker, Horst/0000-0002-3282-3664 NR 24 TC 177 Z9 181 U1 1 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 30 PY 1993 VL 71 IS 9 BP 1328 EP 1331 DI 10.1103/PhysRevLett.71.1328 PG 4 WC Physics, Multidisciplinary SC Physics GA LU913 UT WOS:A1993LU91300010 ER PT J AU ALOUANI, M WILKINS, JW ALBERS, RC WILLS, JM AF ALOUANI, M WILKINS, JW ALBERS, RC WILLS, JM TI TUNING OF THE CHARGE-DENSITY-WAVE IN THE HALOGEN-BRIDGED TRANSITION-METAL LINEAR-CHAIN COMPOUNDS SO PHYSICAL REVIEW LETTERS LA English DT Article ID STATE; COMPLEXES; PRESSURE AB Local-density-approximation calculations are used to show that the metal-metal distance along the chains controls the charge-density wave (CDW) in halogen-bridged transition-metal linear-chain compounds. The strength of the CDW can be understood in terms of a two-band Su-Schrieffer-Heeger model if a hard-core ion-ion repulsion potential is also added. We predict a second-order phase transition from an insulating to a semimetallic ground state and explain trends in dimerization, bond-length ratios, band gaps, and Raman breathing modes in terms of the metal-metal distance. C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545. RP ALOUANI, M (reprint author), OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210, USA. RI Alouani, Mebarek/A-9101-2011 OI Alouani, Mebarek/0000-0002-7985-5276 NR 16 TC 34 Z9 34 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 30 PY 1993 VL 71 IS 9 BP 1415 EP 1418 DI 10.1103/PhysRevLett.71.1415 PG 4 WC Physics, Multidisciplinary SC Physics GA LU913 UT WOS:A1993LU91300032 ER PT J AU CHEN, WYC AF CHEN, WYC TI CONTEXT-FREE GRAMMARS, DIFFERENTIAL-OPERATORS AND FORMAL POWER-SERIES SO THEORETICAL COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT CONF ON FORMAL POWER SERIES AND ALGEBRAIC COMBINATORICS CY MAY 02-05, 1991 CL BORDEAUX, FRANCE ID COMBINATORIAL PROOF; ENUMERATION; LANGUAGES AB In this paper, we introduce the concepts of a formal function over an alphabet and a formal derivative based on a set of substituion rules. We call such a set of rules a context-free grammar because these rules act like a context-free grammar in the sense of a formal language. Given a context-free grammar, we can associate each formal function with an exponential formal power series. In this way, we obtain grammatical interpretations of addition, multiplication and functional composition of formal power series. A surprising fact about the grammatical calculus is that the composition of two formal power series enjoys a very simple grammatical representation. We apply this method to obtain simple demonstrations of Faa di Bruno's formula, and some identities concerning Bell polynomials, Stirling numbers and symmetric functions. In particular, the Lagrange inversion formula has a simple grammatical representation. From this point of view, one sees that Cayley's formula on labeled trees is equivalent to the Lagrange inversion formula. RP CHEN, WYC (reprint author), LOS ALAMOS NATL LAB,C-3,MAIL STOP B265,LOS ALAMOS,NM 87545, USA. NR 24 TC 15 Z9 15 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0304-3975 J9 THEOR COMPUT SCI JI Theor. Comput. Sci. PD AUG 30 PY 1993 VL 117 IS 1-2 BP 113 EP 129 DI 10.1016/0304-3975(93)90307-F PG 17 WC Computer Science, Theory & Methods SC Computer Science GA LT682 UT WOS:A1993LT68200009 ER PT J AU MITTLEMAN, MH AF MITTLEMAN, MH TI INELASTIC ELECTRON-ATOM SCATTERING IN THE PRESENCE OF AN ELLIPTICALLY POLARIZED LOW-FREQUENCY LASER FIELD SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS LA English DT Article ID PHOTON EXCITATION; STATE AB The Kroll-Watson theory has previously been extended to scattering by anatomic target. The theory and its extension were both done for a linearly polarized laser. The theory is here extended to general polarization with the surprising result that off-shell information on the scattering process enters at the level of omega1. It does not appear for linear polarization. The result depends upon no approximations other than an expansion in powers of omega. The connection to existing experiments and previous theory is described. C1 CUNY CITY COLL,DEPT PHYS,NEW YORK,NY 10031. RP MITTLEMAN, MH (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA. NR 12 TC 17 Z9 17 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-4075 J9 J PHYS B-AT MOL OPT JI J. Phys. B-At. Mol. Opt. Phys. PD AUG 28 PY 1993 VL 26 IS 16 BP 2709 EP 2716 DI 10.1088/0953-4075/26/16/024 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA LV951 UT WOS:A1993LV95100024 ER PT J AU GARRITY, ML BROWN, GM ELBERT, JE SACHLEBEN, RA AF GARRITY, ML BROWN, GM ELBERT, JE SACHLEBEN, RA TI A NEW SYNTHETIC ROUTE TO 2-(P-NITROBENZYL)-1,4,7,10-TETRAAZACYCLODODECANE SO TETRAHEDRON LETTERS LA English DT Article ID CHELATING-AGENTS; METAL-IONS; ACID; MACROMOLECULES; BINDING AB A new, general synthetic method for the title compound has been developed, based on the nitration of 2-benzyl-1,4-7,10-tetraazacyclododecane (64 % yield), which provides higher yields and easier purification for scale-up than previously reported methods. C1 OAK RIDGE NATL LAB,DIV CHEM,OAK RIDGE,TN 37831. NR 11 TC 13 Z9 13 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB SN 0040-4039 J9 TETRAHEDRON LETT JI Tetrahedron Lett. PD AUG 27 PY 1993 VL 34 IS 35 BP 5531 EP 5534 PG 4 WC Chemistry, Organic SC Chemistry GA LV107 UT WOS:A1993LV10700004 ER PT J AU FIELDS, CL PITTS, JR HALE, MJ BINGHAM, C LEWANDOWSKI, A KING, DE AF FIELDS, CL PITTS, JR HALE, MJ BINGHAM, C LEWANDOWSKI, A KING, DE TI FORMATION OF FULLERENES IN HIGHLY CONCENTRATED SOLAR FLUX SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Letter AB Of the many methods available to produce fullerenes, one of the most exciting uses highly concentrated sunlight to vaporize the graphite. We have shown in recent experiments, as has the Rice University group, that this method can effectively produce these materials. The 10-kW solar furnace at the National Renewable Energy Laboratory (NREL) was used with a reaction chamber designed to deliver to a graphite pellet a solar flux of 1200 W/cm2. Analysis of the resulting soot by mass spectrometry and HPLC has confirmed the existence of fullerenes. Although our results show great promise, a number of fundamental issues still need to be addressed. C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. RP FIELDS, CL (reprint author), UNIV NO COLORADO,GREELEY,CO 80639, USA. NR 5 TC 55 Z9 55 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 26 PY 1993 VL 97 IS 34 BP 8701 EP 8702 DI 10.1021/j100136a008 PG 2 WC Chemistry, Physical SC Chemistry GA LX146 UT WOS:A1993LX14600008 ER PT J AU WHITE, JC HESS, AC AF WHITE, JC HESS, AC TI AN EXAMINATION OF THE ELECTROSTATIC POTENTIAL OF SILICALITE USING PERIODIC HARTREE-FOCK THEORY SO JOURNAL OF PHYSICAL CHEMISTRY LA English DT Correction ID MOLECULAR-ORBITAL METHODS; VALENCE BASIS-SETS; ZSM-5; DYNAMICS; ZEOLITES; ELEMENTS; METHANE; SIEVE AB ZSM-5 is a widely used industrial catalyst. Its siliceous analog, silicalite, is a molecular sieve with unique hydrophobic properties. To begin to understand the properties of this zeolite and to provide a base line for the study of aluminated forms, we have carried out a periodic Hartree-Fock (PHF) calculation on silicalite. The position of molecules in the lattice has been speculated for many years. From three-dimensional plots of the PHF electrostatic potential, we postulate that the most favorable position of intercalated species is near the intersection of the 10-ring channels. C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. NR 22 TC 82 Z9 82 U1 1 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0022-3654 J9 J PHYS CHEM-US JI J. Phys. Chem. PD AUG 26 PY 1993 VL 97 IS 34 BP 8703 EP 8706 DI 10.1021/j100136a009 PG 4 WC Chemistry, Physical SC Chemistry GA LX146 UT WOS:A1993LX14600009 ER PT J AU CHENG, BL SCHRAMM, DN TRURAN, JW AF CHENG, BL SCHRAMM, DN TRURAN, JW TI A GENERAL COVARIANT JUMP CONDITION ACROSS A BUBBLE WALL AND THE QCD PHASE-TRANSITION SO PHYSICS LETTERS B LA English DT Article ID EXPANDING UNIVERSE; PRIMORDIAL NUCLEOSYNTHESIS; INFLATIONARY UNIVERSE; GAUGE-THEORIES; HADRON; SYMMETRY; VACUUM; TEMPERATURE; COLLISIONS; EXPANSION AB Covariant jump conditions across a bubble wall, including surface tension and dissipation, for a nongravitational moving surface have been derived. Special situations, such as those associated with a domain wall, a dust shell, and a spherical boundary, are discussed. In particular, the cosmological QCD phase transition has been examined as a specific application of the general formalism. The possible mechanism of energy transport during the phase transition is studied, and a critical condition for neutrino conduction to dominate over the hydrodynamic flow has been obtained. C1 UNIV CHICAGO,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510. RP CHENG, BL (reprint author), UNIV ILLINOIS,DEPT ASTRON,1002 W GREEN ST,URBANA,IL 61801, USA. NR 48 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 26 PY 1993 VL 313 IS 1-2 BP 15 EP 24 DI 10.1016/0370-2693(93)91184-O PG 10 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LV189 UT WOS:A1993LV18900004 ER PT J AU MALTMAN, K AF MALTMAN, K TI Q2-DEPENDENCE OF MESON MIXING IN FEW-BODY CHARGE-SYMMETRY BREAKING - PI-0-ETA MIXING TO ONE-LOOP IN CHIRAL PERTURBATION-THEORY SO PHYSICS LETTERS B LA English DT Article ID QUARK; ENERGIES AB It is pointed out that the meson mixing matrix elements usually considered responsible for the bulk of the observed few-body charge symmetry breaking are naturally q2-dependent in QCD. For pi0-eta mixing, using the usual representation of the pseudoscalar fields, the leading q2-dependence can be explicitly calculated using chiral perturbation theory to one loop, the result being a significant decrease in the magnitude of the matrix element in going from timelike to spacelike values of q2. Since it is the latter range of q2 which is relevant to NN scattering and the few-body bound state, this result calls into serious question the standard treatment of few-body charge symmetry breaking contributions associated with pi0-eta and rho-omega mixing. C1 LOS ALAMOS NATL LAB,PDO,LOS ALAMOS,NM 87545. RP MALTMAN, K (reprint author), YORK UNIV,DEPT MATH & STAT,4700 KEELE ST,N YORK M3J 1P3,ONTARIO,CANADA. NR 27 TC 20 Z9 21 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 26 PY 1993 VL 313 IS 1-2 BP 203 EP 208 DI 10.1016/0370-2693(93)91213-7 PG 6 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LV189 UT WOS:A1993LV18900033 ER PT J AU FRABETTI, PL CHEUNG, HWK CUMALAT, JP DALIAPICCOLA, 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 VITTONE, M 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 BUCHHOLZ, D CLAES, D GOBBI, B OREILLY, B BISHOP, JM CASON, NM KENNEDY, CJ KIM, GN LIN, TF PUSELJIC, DL RUCHTI, RC SHEPHARD, WD SWIATEK, JA WU, ZY ARENA, V BOCA, G CASTOLDI, C GIANINI, G RATTI, SP RICCARDI, C VITULO, P LOPEZ, A GRIM, GP PAOLONE, VS YAGER, PM WILSON, JR SHELDON, PD DAVENPORT, F FILASETA, JF BLACKETT, GR PISHARODY, M HANDLER, T CHEON, BG KANG, JS KIM, KY AF FRABETTI, PL CHEUNG, HWK CUMALAT, JP DALIAPICCOLA, 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 VITTONE, M 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 BUCHHOLZ, D CLAES, D GOBBI, B OREILLY, B BISHOP, JM CASON, NM KENNEDY, CJ KIM, GN LIN, TF PUSELJIC, DL RUCHTI, RC SHEPHARD, WD SWIATEK, JA WU, ZY ARENA, V BOCA, G CASTOLDI, C GIANINI, G RATTI, SP RICCARDI, C VITULO, P LOPEZ, A GRIM, GP PAOLONE, VS YAGER, PM WILSON, JR SHELDON, PD DAVENPORT, F FILASETA, JF BLACKETT, GR PISHARODY, M HANDLER, T CHEON, BG KANG, JS KIM, KY TI A MEASUREMENT OF GAMMA(DS+-]PHI-MU+NU)/GAMMA(DS+-]PHI-PI+) SO PHYSICS LETTERS B LA English DT Article ID SEMILEPTONIC DECAYS; MESONS; LATTICE AB Fermilab high-energy photoproduction experiment E687 measures a branching ratio of GAMMA(D(s)+ --> phimu+nu)/GAMMA(D(s)+ --> phipi+) = 0.58 +/- 0.17 (stat) +/- 0.07 (sys). This branching ratio is combined with theoretical inputs to obtain a new measurement of the D(s)+ absolute branching ratio of GAMMA(D(s)+ --> phipi+)/GAMMA(D(s)+ - all) = 0.031 +/- 0.009 (stat) +/- 0.005 (sys) +/- 0.004 (theoretical). C1 INFN,I-40126 BOLOGNA,ITALY. UNIV COLORADO,BOULDER,CO 80309. FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. INFN,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY. UNIV ILLINOIS,URBANA,IL 61801. UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY. INFN,I-20133 MILAN,ITALY. NORTHWESTERN UNIV,EVANSTON,IL 60208. UNIV NOTRE DAME,NOTRE DAME,IN 46556. DIPARTIMENTO FIS TEORICA & NUCL,I-27100 PAVIA,ITALY. INFN,I-27100 PAVIA,ITALY. UNIV PUERTO RICO,MAYAGUEZ,PR 00708. UNIV CALIF DAVIS,DAVIS,CA 95616. UNIV S CAROLINA,COLUMBIA,SC 29208. VANDERBILT UNIV,NASHVILLE,TN 37235. UNIV N CAROLINA,ASHEVILLE,NC 28804. NO KENTUCKY UNIV,HIGHLAND HTS,KY 41076. UNIV TENNESSEE,KNOXVILLE,TN 37996. KOREA UNIV,SEOUL 136701,SOUTH KOREA. RP FRABETTI, PL (reprint author), UNIV BOLOGNA,DIPARTIMENTO FIS,I-40126 BOLOGNA,ITALY. NR 13 TC 20 Z9 20 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD AUG 26 PY 1993 VL 313 IS 1-2 BP 253 EP 259 DI 10.1016/0370-2693(93)91221-8 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LV189 UT WOS:A1993LV18900041 ER PT J AU KODAMA, K USHIDA, N MOKHTARANI, A PAOLONE, VS VOLK, JT WILCOX, JO YAGER, PM EDELSTEIN, RM FREYBERGER, AP GIBAUT, DB LIPTON, RJ NICHOLS, WR POTTER, DM RUSS, JS ZHANG, C ZHANG, Y JANG, HI KIM, JY KIM, TI LIM, IT PAC, MY BALLER, BR STEFANSKI, RJ NAKAZAWA, K CHUNG, KS CHUNG, SH KIM, DC PARK, IG PARK, MS SONG, JS YOON, CS CHIKAWA, M ABE, T FUJII, T FUJIOKA, G FUJIWARA, K FUKUSHIMA, H HARA, T TAKAHASHI, Y TARUMA, K TSUZUKI, Y YOKOYAMA, C CHANG, SD CHEON, BG CHO, JH KANG, JS KIM, CO KIM, KY KIM, TY LEE, JC LEE, SB LIM, GY NAM, SW SHIN, TS SIM, KS WOO, JK ISOKANE, Y TSUNEOKA, Y AOKI, S GAUTHIER, A HOSHINO, K KITAMURA, H KOBAYASHI, M KOZAKI, T MIYANISHI, M NAKAMURA, K NAKAMURA, M NAKAMURA, Y NAKANISHI, S NIU, K NIWA, K NOMURA, M TAJIMA, H YOSHIDA, S ARYAL, M DUNLEA, JM FREDERIKSEN, SG KURAMATA, S LUNDBERG, BG OLEYNIK, GA REAY, NW REIBEL, K SIDWELL, RA STANTON, NR MORIYAMA, K SHIBATA, H KALBFLEISCH, GR SKUBIC, P SNOW, JM WILLIS, SE KUSUMOTO, O NAKAMURA, K OKUSAWA, T TERANAKA, M TOMINAGA, T YOSHIDA, T YUUKI, H OKABE, H YOKOTA, J ADACHI, M IKEGAMI, I KAZUNO, M NIU, E SHIBUYA, H WATANABE, S SATO, Y SESHIMO, M TEZUKA, I BAHK, SY KIM, SK AF KODAMA, K USHIDA, N MOKHTARANI, A PAOLONE, VS VOLK, JT WILCOX, JO YAGER, PM EDELSTEIN, RM FREYBERGER, AP GIBAUT, DB LIPTON, RJ NICHOLS, WR POTTER, DM RUSS, JS ZHANG, C ZHANG, Y JANG, HI KIM, JY KIM, TI LIM, IT PAC, MY BALLER, BR STEFANSKI, RJ NAKAZAWA, K CHUNG, KS CHUNG, SH KIM, DC PARK, IG PARK, MS SONG, JS YOON, CS CHIKAWA, M ABE, T FUJII, T FUJIOKA, G FUJIWARA, K FUKUSHIMA, H HARA, T TAKAHASHI, Y TARUMA, K TSUZUKI, Y YOKOYAMA, C CHANG, SD CHEON, BG CHO, JH KANG, JS KIM, CO KIM, KY KIM, TY LEE, JC LEE, SB LIM, GY NAM, SW SHIN, TS SIM, KS WOO, JK ISOKANE, Y TSUNEOKA, Y AOKI, S GAUTHIER, A HOSHINO, K KITAMURA, H KOBAYASHI, M KOZAKI, T MIYANISHI, M NAKAMURA, K NAKAMURA, M NAKAMURA, Y NAKANISHI, S NIU, K NIWA, K NOMURA, M TAJIMA, H YOSHIDA, S ARYAL, M DUNLEA, JM FREDERIKSEN, SG KURAMATA, S LUNDBERG, BG OLEYNIK, GA REAY, NW REIBEL, K SIDWELL, RA STANTON, NR MORIYAMA, K SHIBATA, H KALBFLEISCH, GR SKUBIC, P SNOW, JM WILLIS, SE KUSUMOTO, O NAKAMURA, K OKUSAWA, T TERANAKA, M TOMINAGA, T YOSHIDA, T YUUKI, H OKABE, H YOKOTA, J ADACHI, M IKEGAMI, I KAZUNO, M NIU, E SHIBUYA, H WATANABE, S SATO, Y SESHIMO, M TEZUKA, I BAHK, SY KIM, SK TI LIMITS FOR 4-PRONG AND 5-PRONG SEMIMUONIC CHARM MESON DECAYS SO PHYSICS LETTERS B LA English DT Article ID GEV/C; RATIO AB Upper limits at the 90% confidence level are presented for four- and five-prong semimuonic decays of charm mesons. From a study of four-prong vertices we find B(D0 --> K-pi+pi-mu+nu)/B(D0 --> K-mu+nu) < 0.037 and B(D0 --> (K*BAR (892)pi)-mu+nu)/B(D0 --> K-mu+nu) < 0.043. The five-prong vertices yield the result B(D(S)+ --> eta'mu+nu)/B(D(S)+ --> phimu+nu) < 1.6. C1 UNIV CALIF DAVIS, DAVIS, CA 95616 USA. CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA. CHONNAM NATL UNIV, KWANGJU 500757, SOUTH KOREA. FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA. GYEONGSANG NATL UNIV, JINJU 660300, SOUTH KOREA. KOREA UNIV, SEOUL 136701, SOUTH KOREA. KINKI UNIV, OSAKA, OSAKA 577, JAPAN. GIFU UNIV, GIFU 50111, JAPAN. KOBE UNIV, KOBE 657, JAPAN. OKAYAMA UNIV, OKAYAMA 700, JAPAN. NAGOYA INST TECHNOL, NAGOYA, AICHI 466, JAPAN. UNIV OKLAHOMA, NORMAN, OK 73019 USA. SCI EDUC INST OSAKA PREFECTURE, OSAKA 558, JAPAN. OSAKA CITY UNIV, OSAKA 558, JAPAN. NAGOYA UNIV, NAGOYA, AICHI 464, JAPAN. OHIO STATE UNIV, COLUMBUS, OH 43210 USA. WONKWANG UNIV, IRI 570749, SOUTH KOREA. TOHO UNIV, FUNABASHI, CHIBA 274, JAPAN. UTSUNOMIYA UNIV, UTSUNOMIYA, TOCHIGI 321, JAPAN. RP AICHI UNIV EDUC, KARIYA 448, JAPAN. RI Russ, James/P-3092-2014; Aoki, Shigeki/L-6044-2015 OI Russ, James/0000-0001-9856-9155; NR 16 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD AUG 26 PY 1993 VL 313 IS 1-2 BP 260 EP 266 DI 10.1016/0370-2693(93)91222-9 PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LV189 UT WOS:A1993LV18900042 ER PT J AU ADRIANI, O AGUILARBENITEZ, M AHLEN, S ALCARAZ, J ALOISIO, A ALVERSON, G ALVIGGI, MG AMBROSI, G AN, Q ANDERHUB, H ANDERSON, AL ANDREEV, VP ANTONOV, L ANTREASYAN, D ARCE, P AREFIEV, A ATAMANCHUK, A AZEMOON, T AZIZ, T BABA, PVKS BACHMANN, S BAGNAIA, P BAKKEN, JA BAKSAY, L BALL, RC BANERJEE, S BAO, J BARILLERE, R BARONE, L BASCHIROTTO, A BATTISTON, R BAY, A BECATTINI, F BECKER, U BEHNER, F BEHRENS, J BENCZE, GL BERDUGO, J BERGES, P BERTUCCI, B BETEV, BL BIASINI, M BILAND, A BILEI, GM BIZZARRI, R BLAISING, JJ BOBBINK, GJ BOCK, R BOHM, A BORGIA, B BOSETTI, M BOURILKOV, D BOURQUIN, M BOUTIGNY, D BOUWENS, B BRAMBILLA, E BRANSON, JG BROCK, IC BROOKS, M BUJAK, A BURGER, JD BURGER, WJ BUSENITZ, J BUYTENHUIJS, A CAI, XD CAPELL, M CARIA, M CARLINO, G CARTACCI, AM CASTELLO, R CERRADA, M CESARONI, F CHANG, YH CHATURVEDI, UK CHEMARIN, M CHEN, A CHEN, C CHEN, GM CHEN, HF CHEN, HS CHEN, M CHEN, WY CHIEFARI, G CHIEN, CY CHOI, MT CHUNG, S CIVININI, C CLARE, I CLARE, R COAN, TE COHN, HO COIGNET, G COLINO, N CONTIN, A CUI, XT CUI, XY DAI, TS DALESSANDRO, R DEASMUNDIS, R DEGRE, A DEITERS, K DENES, E DENES, P DENOTARISTEFANI, F DHINA, M DIBITONTO, D DIEMOZ, M DIMITROV, HR DIONISI, C DJAMBAZOV, L DOVA, MT DRAGO, E DUCHESNEAU, D DUINKER, P DURAN, I EASO, S ELMAMOUNI, H ENGLER, A EPPLING, FJ ERNE, FC EXTERMANN, P FABBRETTI, R FABRE, M FALCIANO, S FAN, SJ FACKLER, O FAY, J FELCINI, M FERGUSON, T FERNANDEZ, D FERNANDEZ, G FERRONI, F FESEFELDT, H FIANDRINI, E FIELD, J FILTHAUT, F FINOCCHIARO, G FISHER, PH FORCONI, G FOREMAN, T FREUDENREICH, K FRIEBEL, W FUKUSHIMA, M GAILLOUD, M GALAKTIONOV, Y GALLO, E GANGULI, SN GARCIAABIA, P GELE, D GENTILE, S GOLDFARB, S GONG, ZF GONZALEZ, E GOUGAS, A GOUJON, D GRATTA, G GRUENEWALD, M GU, C GUANZIROLI, M GUO, JK GUPTA, VK GURTU, A GUSTAFSON, HR GUTAY, LJ HANGARTER, K HASAN, A HAUSCHILDT, D HE, CF HE, JT HEBBEKER, T HEBERT, M HERTEN, G HERVE, A HILGERS, K HOFER, H HOORANI, H HU, G HU, GQ ILLE, B ILYAS, MM INNOCENTE, V JANSSEN, H JEZEQUEL, S JIN, BN JONES, LW KASSER, A KHAN, RA KAMYSHKOV, Y KAPINOS, P KAPUSTINSKY, JS KARYOTAKIS, Y KAUR, M KHOKHAR, S KIENZLEFOCACCI, MN KIM, JK KIM, SC KIM, YG KINNISON, WW KIRKBY, D KIRSCH, S KITTEL, W KLIMENTOV, A KONIG, AC KOFFEMAN, E KORNADT, O KOUTSENKO, V KOULBARDIS, A KRAEMER, RW KRAMER, T KRASTEV, VR KRENZ, W KRIVSHICH, A KUIJTEN, H KUMAR, KS KUNIN, A LANDI, G LANSKE, D LANZANO, S LEBRUN, P LECOMTE, P LECOQ, P LECOULTRE, P LEE, DM LEEDOM, I LEGGETT, C LEGOFF, JM LEISTE, R LENTI, M LEONARDI, E LEYTENS, X LI, C LI, HT LI, PJ LIAO, JY LIN, WT LIN, ZY LINDE, FL LINDEMANN, B LISTA, L LIU, Y LOHMANN, W LONGO, E LU, YS LUBBERS, JM LUBELSMEYER, K LUCI, C LUCKEY, D LUDOVICI, L LUMINARI, L LUSTERMANN, W MA, JM MA, WG MACDERMOTT, M MALHOTRA, PK MALIK, R MALININ, A MANA, C MAOLINBAY, M MARCHESINI, P MARION, F MARIN, A MARTIN, JP MARTINEZLASO, L MARZANO, F MASSARO, GGG MAZUMDAR, K MCBRIDE, P MCMAHON, T MCNALLY, D MERK, M MEROLA, L MESCHINI, M METZGER, WJ MI, Y MILLS, GB MIR, Y MIRABELLI, G MNICH, J MOLLER, M MONTELEONI, B MORAND, R MORGANTI, S MOULAI, NE MOUNT, R MULLER, S NADTOCHY, A NAGY, E NAPOLITANO, M NESSITEDALDI, F NEWMAN, H NEYER, C NIAZ, MA NIPPE, A NOWAK, H ORGANTINI, G PANDOULAS, D PAOLETTI, S PAOLUCCI, P PASCALA, G PASSALEVA, G PATRICELLI, S PAUL, T PAULUZZI, M PAUS, C PAUSS, F PEI, YJ PENSOTTI, S PERRETGALLIX, D PERRIER, J PEVSNER, A PICCOLO, D PIERI, M PIROUE, PA PLASIL, F PLYASKIN, V POHL, M POJIDAEV, V POSTEMA, H QI, ZD QIAN, JM QURESHI, KN RAGHAVAN, R RAHALCALLOT, G RANCOITA, PG RATTAGGI, M RAVEN, G RAZIS, P READ, K REN, D REN, Z RESCIGNO, M REUCROFT, S RICKER, A RIEMANN, S RIEMERS, BC RILES, K RIND, O RIZVI, HA RODRIGUEZ, FJ ROE, BP ROHNER, M ROHNER, S ROMERO, L ROSE, J ROSIERLEES, S ROSMALEN, R ROSSELET, P VANROSSUM, W ROTH, S RUBBIA, A RUBIO, JA RYKACZEWSKI, H SACHWITZ, M SALICIO, J SALICIO, JM SANDERS, GS SANTOCCHIA, A SARAKINOS, MS SARTORELLI, G SASSOWSKY, M SAUVAGE, G SCHAFER, C SCHEGELSKY, V SCHMITZ, D SCHMITZ, P SCHNEEGANS, M SCHOPPER, H SCHOTANUS, DJ SHOTKIN, S SCHREIBER, HJ SHUKLA, J SCHULTE, R SCHULTE, S SCHULTZE, K SCHWENKE, J SCHWERING, G SCIACCA, C SCOTT, I SEHGAL, R SEILER, PG SENS, JC SERVOLI, L SHEER, I SHEN, DZ SHEVCHENKO, S SHI, XR SHUMILOV, E SHOUTKO, V SON, D SOPCZAK, A SPARTIOTIS, C SPICKERMANN, T SPILLANTINI, P STAROSTA, R STEUER, M STICKLAND, DP STICOZZI, F STONE, H STRAUCH, K STRINGFELLOW, BC SUDHAKAR, K SULTANOV, G SUN, LZ SUTER, H SWAIN, JD SYED, AA TANG, XW TAYLOR, L TERZI, G TING, SCC TING, SM TONUTTI, M TONWAR, SC TOTH, J TSAREGORODTSEV, A TSIPOLITIS, G TULLY, C TUNG, KL ULBRICHT, J URBAN, L UWER, U VALENTE, E VANDEWALLE, RT VETLITSKY, I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VOROBIEV, I VOROBYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, C WANG, CR WANG, GH WANG, XL WANG, YF WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, SX WYNHOFF, S WYSLOUCH, B XIE, YY XU, JG XU, ZZ XUE, ZL YAN, DS YANG, BZ YANG, CG YANG, G YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YUNUS, N YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, B ZHOU, GJ ZHOU, JF ZHU, RY ZICHICHI, A VANDERZWAAN, BCC AF ADRIANI, O AGUILARBENITEZ, M AHLEN, S ALCARAZ, J ALOISIO, A ALVERSON, G ALVIGGI, MG AMBROSI, G AN, Q ANDERHUB, H ANDERSON, AL ANDREEV, VP ANTONOV, L ANTREASYAN, D ARCE, P AREFIEV, A ATAMANCHUK, A AZEMOON, T AZIZ, T BABA, PVKS BACHMANN, S BAGNAIA, P BAKKEN, JA BAKSAY, L BALL, RC BANERJEE, S BAO, J BARILLERE, R BARONE, L BASCHIROTTO, A BATTISTON, R BAY, A BECATTINI, F BECKER, U BEHNER, F BEHRENS, J BENCZE, GL BERDUGO, J BERGES, P BERTUCCI, B BETEV, BL BIASINI, M BILAND, A BILEI, GM BIZZARRI, R BLAISING, JJ BOBBINK, GJ BOCK, R BOHM, A BORGIA, B BOSETTI, M BOURILKOV, D BOURQUIN, M BOUTIGNY, D BOUWENS, B BRAMBILLA, E BRANSON, JG BROCK, IC BROOKS, M BUJAK, A BURGER, JD BURGER, WJ BUSENITZ, J BUYTENHUIJS, A CAI, XD CAPELL, M CARIA, M CARLINO, G CARTACCI, AM CASTELLO, R CERRADA, M CESARONI, F CHANG, YH CHATURVEDI, UK CHEMARIN, M CHEN, A CHEN, C CHEN, GM CHEN, HF CHEN, HS CHEN, M CHEN, WY CHIEFARI, G CHIEN, CY CHOI, MT CHUNG, S CIVININI, C CLARE, I CLARE, R COAN, TE COHN, HO COIGNET, G COLINO, N CONTIN, A CUI, XT CUI, XY DAI, TS DALESSANDRO, R DEASMUNDIS, R DEGRE, A DEITERS, K DENES, E DENES, P DENOTARISTEFANI, F DHINA, M DIBITONTO, D DIEMOZ, M DIMITROV, HR DIONISI, C DJAMBAZOV, L DOVA, MT DRAGO, E DUCHESNEAU, D DUINKER, P DURAN, I EASO, S ELMAMOUNI, H ENGLER, A EPPLING, FJ ERNE, FC EXTERMANN, P FABBRETTI, R FABRE, M FALCIANO, S FAN, SJ FACKLER, O FAY, J FELCINI, M FERGUSON, T FERNANDEZ, D FERNANDEZ, G FERRONI, F FESEFELDT, H FIANDRINI, E FIELD, J FILTHAUT, F FINOCCHIARO, G FISHER, PH FORCONI, G FOREMAN, T FREUDENREICH, K FRIEBEL, W FUKUSHIMA, M GAILLOUD, M GALAKTIONOV, Y GALLO, E GANGULI, SN GARCIAABIA, P GELE, D GENTILE, S GOLDFARB, S GONG, ZF GONZALEZ, E GOUGAS, A GOUJON, D GRATTA, G GRUENEWALD, M GU, C GUANZIROLI, M GUO, JK GUPTA, VK GURTU, A GUSTAFSON, HR GUTAY, LJ HANGARTER, K HASAN, A HAUSCHILDT, D HE, CF HE, JT HEBBEKER, T HEBERT, M HERTEN, G HERVE, A HILGERS, K HOFER, H HOORANI, H HU, G HU, GQ ILLE, B ILYAS, MM INNOCENTE, V JANSSEN, H JEZEQUEL, S JIN, BN JONES, LW KASSER, A KHAN, RA KAMYSHKOV, Y KAPINOS, P KAPUSTINSKY, JS KARYOTAKIS, Y KAUR, M KHOKHAR, S KIENZLEFOCACCI, MN KIM, JK KIM, SC KIM, YG KINNISON, WW KIRKBY, D KIRSCH, S KITTEL, W KLIMENTOV, A KONIG, AC KOFFEMAN, E KORNADT, O KOUTSENKO, V KOULBARDIS, A KRAEMER, RW KRAMER, T KRASTEV, VR KRENZ, W KRIVSHICH, A KUIJTEN, H KUMAR, KS KUNIN, A LANDI, G LANSKE, D LANZANO, S LEBRUN, P LECOMTE, P LECOQ, P LECOULTRE, P LEE, DM LEEDOM, I LEGGETT, C LEGOFF, JM LEISTE, R LENTI, M LEONARDI, E LEYTENS, X LI, C LI, HT LI, PJ LIAO, JY LIN, WT LIN, ZY LINDE, FL LINDEMANN, B LISTA, L LIU, Y LOHMANN, W LONGO, E LU, YS LUBBERS, JM LUBELSMEYER, K LUCI, C LUCKEY, D LUDOVICI, L LUMINARI, L LUSTERMANN, W MA, JM MA, WG MACDERMOTT, M MALHOTRA, PK MALIK, R MALININ, A MANA, C MAOLINBAY, M MARCHESINI, P MARION, F MARIN, A MARTIN, JP MARTINEZLASO, L MARZANO, F MASSARO, GGG MAZUMDAR, K MCBRIDE, P MCMAHON, T MCNALLY, D MERK, M MEROLA, L MESCHINI, M METZGER, WJ MI, Y MILLS, GB MIR, Y MIRABELLI, G MNICH, J MOLLER, M MONTELEONI, B MORAND, R MORGANTI, S MOULAI, NE MOUNT, R MULLER, S NADTOCHY, A NAGY, E NAPOLITANO, M NESSITEDALDI, F NEWMAN, H NEYER, C NIAZ, MA NIPPE, A NOWAK, H ORGANTINI, G PANDOULAS, D PAOLETTI, S PAOLUCCI, P PASCALA, G PASSALEVA, G PATRICELLI, S PAUL, T PAULUZZI, M PAUS, C PAUSS, F PEI, YJ PENSOTTI, S PERRETGALLIX, D PERRIER, J PEVSNER, A PICCOLO, D PIERI, M PIROUE, PA PLASIL, F PLYASKIN, V POHL, M POJIDAEV, V POSTEMA, H QI, ZD QIAN, JM QURESHI, KN RAGHAVAN, R RAHALCALLOT, G RANCOITA, PG RATTAGGI, M RAVEN, G RAZIS, P READ, K REN, D REN, Z RESCIGNO, M REUCROFT, S RICKER, A RIEMANN, S RIEMERS, BC RILES, K RIND, O RIZVI, HA RODRIGUEZ, FJ ROE, BP ROHNER, M ROHNER, S ROMERO, L ROSE, J ROSIERLEES, S ROSMALEN, R ROSSELET, P VANROSSUM, W ROTH, S RUBBIA, A RUBIO, JA RYKACZEWSKI, H SACHWITZ, M SALICIO, J SALICIO, JM SANDERS, GS SANTOCCHIA, A SARAKINOS, MS SARTORELLI, G SASSOWSKY, M SAUVAGE, G SCHAFER, C SCHEGELSKY, V SCHMITZ, D SCHMITZ, P SCHNEEGANS, M SCHOPPER, H SCHOTANUS, DJ SHOTKIN, S SCHREIBER, HJ SHUKLA, J SCHULTE, R SCHULTE, S SCHULTZE, K SCHWENKE, J SCHWERING, G SCIACCA, C SCOTT, I SEHGAL, R SEILER, PG SENS, JC SERVOLI, L SHEER, I SHEN, DZ SHEVCHENKO, S SHI, XR SHUMILOV, E SHOUTKO, V SON, D SOPCZAK, A SPARTIOTIS, C SPICKERMANN, T SPILLANTINI, P STAROSTA, R STEUER, M STICKLAND, DP STICOZZI, F STONE, H STRAUCH, K STRINGFELLOW, BC SUDHAKAR, K SULTANOV, G SUN, LZ SUTER, H SWAIN, JD SYED, AA TANG, XW TAYLOR, L TERZI, G TING, SCC TING, SM TONUTTI, M TONWAR, SC TOTH, J TSAREGORODTSEV, A TSIPOLITIS, G TULLY, C TUNG, KL ULBRICHT, J URBAN, L UWER, U VALENTE, E VANDEWALLE, RT VETLITSKY, I VIERTEL, G VIKAS, P VIKAS, U VIVARGENT, M VOGEL, H VOGT, H VOROBIEV, I VOROBYOV, AA VUILLEUMIER, L WADHWA, M WALLRAFF, W WANG, C WANG, CR WANG, GH WANG, XL WANG, YF WANG, ZM WEBER, A WEBER, J WEILL, R WENAUS, TJ WENNINGER, J WHITE, M WILLMOTT, C WITTGENSTEIN, F WRIGHT, D WU, SX WYNHOFF, S WYSLOUCH, B XIE, YY XU, JG XU, ZZ XUE, ZL YAN, DS YANG, BZ YANG, CG YANG, G YE, CH YE, JB YE, Q YEH, SC YIN, ZW YOU, JM YUNUS, N YZERMAN, M ZACCARDELLI, C ZEMP, P ZENG, M ZENG, Y ZHANG, DH ZHANG, ZP ZHOU, B ZHOU, GJ ZHOU, JF ZHU, RY ZICHICHI, A VANDERZWAAN, BCC TI SEARCH FOR NARROW VECTOR RESONANCES IN THE Z MASS RANGE SO PHYSICS LETTERS B LA English DT Article ID FERMION PAIR PRODUCTION; = 1.8 TEV; QED CORRECTIONS; COLLISIONS; DECAYS; EVENTS AB The hadronic lineshape of the Z has been analysed for evidence of signals of new, narrow vector resonances in the Z-mass range. The production rate of such resonances would be enhanced due to mixing with the Z. No evidence for new states is found, and it is thus possible to exclude, at the 95% confidence level, a quarkonium state in the mass range from 87.7 to 94.7 GeV. C1 RHEIN WESTFAL TH AACHEN,INST PHYS 3,W-5100 AACHEN,GERMANY. NATL INST HIGH ENERGY PHYS,1009 DB AMSTERDAM,NETHERLANDS. UNIV MICHIGAN,ANN ARBOR,MI 48109. LAB ANNECY LE VIEUX PHYS PARTICULES,IN2P3,CNRS,F-74941 ANNECY LE VIEUX,FRANCE. JOHNS HOPKINS UNIV,BALTIMORE,MD 21218. INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA. INFN,SEZ BOLOGNA,I-40126 BOLOGNA,ITALY. TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA. BOSTON UNIV,BOSTON,MA 02215. NORTHEASTERN UNIV,BOSTON,MA 02115. HUNGARIAN ACAD SCI,CENT RES INST PHYS,H-1525 BUDAPEST 114,HUNGARY. HARVARD UNIV,CAMBRIDGE,MA 02139. MIT,CAMBRIDGE,MA 02139. UNIV FLORENCE,I-50125 FLORENCE,ITALY. INFN,SEZ FIRENZE,I-50125 FLORENCE,ITALY. CERN,EUROPEAN LAB PARTICLE PHYS,CH-1211 GENEVA 23,SWITZERLAND. WORLD LAB,FBLJA PROJECT,CH-1211 GENEVA 23,SWITZERLAND. UNIV GENEVA,CH-1211 GENEVA 4,SWITZERLAND. CHINESE UNIV SCI & TECHNOL,HEFEI 230029,PEOPLES R CHINA. UNIV LAUSANNE,CH-1015 LAUSANNE,SWITZERLAND. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. UNIV LYON 1,INST PHYS NUCL LYON,IN2P3,CNRS,F-69622 VILLEURBANNE,FRANCE. LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544. CTR INVEST ENERGET MEDIOAMBIENTALES & TECNOL,E-28040 MADRID,SPAIN. INFN,SEZ MILANO,I-20133 MILAN,ITALY. MOSCOW THEORET & EXPTL PHYS INST,MOSCOW,RUSSIA. INFN,SEZ NAPOLI,I-80125 NAPLES,ITALY. UNIV NAPLES,I-80125 NAPLES,ITALY. NATL INST NUCL PHYS & HIGH ENERGY PHYS,6525 ED NIJMEGEN,NETHERLANDS. CATHOLIC UNIV NIJMEGEN,6525 ED NIJMEGEN,NETHERLANDS. CALTECH,PASADENA,CA 91125. INFN,SEZ PERUGIA,I-06100 PERUGIA,ITALY. OAK RIDGE NATL LAB,OAK RIDGE,TN 37831. UNIV PERUGIA,I-06100 PERUGIA,ITALY. PRINCETON UNIV,PRINCETON,NJ 08544. CARNEGIE MELLON UNIV,PITTSBURGH,PA 15213. INFN,SEZ ROMA,I-00185 ROME,ITALY. UNIV ROMA LA SAPIENZA,I-00185 ROME,ITALY. UNIV CALIF SAN DIEGO,LA JOLLA,CA 92093. UNIV SANTIAGO,DEPT FIS PARTICULAS ELEMENTALES,E-15706 SANTIAGO,SPAIN. SHANGHAI INST CERAM,SHANGHAI,PEOPLES R CHINA. BULGARIAN ACAD SCI,INST MECHATRON,BU-1113 SOFIA,BULGARIA. KOREA ADV INST SCI & TECHNOL,CTR HIGH ENERGY PHYS,TAEJON 305701,SOUTH KOREA. UNIV ALABAMA,TUSCALOOSA,AL 35486. PURDUE UNIV,W LAFAYETTE,IN 47907. DESY,INST HOCHENERGIEPHYS,O-1615 ZEUTHEN,GERMANY. SWISS FED INST TECHNOL,CH-8093 ZURICH,SWITZERLAND. UNIV HAMBURG,W-2000 HAMBURG 13,GERMANY. HIGH ENERGY PHYS GRP,TAIPEI,TAIWAN. ST PETERSBURG NUCL PHYS INST,ST PETERSBURG,RUSSIA. PAUL SCHERRER INST,CH-5232 VILLIGEN,SWITZERLAND. RP ADRIANI, O (reprint author), RHEIN WESTFAL TH AACHEN,INST PHYS 1,W-5100 AACHEN,GERMANY. RI Tsaregorodtsev, Andrei/E-3873-2016; van der Zwaan, Bob/F-4070-2015; D'Alessandro, Raffaello/F-5897-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge, francisco javier/H-9682-2015; Rancoita, Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Arce, Pedro/L-1268-2014; Roth, Stefan/J-2757-2016; Fiandrini, Emanuele/C-4549-2008; Leijtens, Xaveer/F-3302-2010; Lista, Luca/C-5719-2008; Ludovici, Lucio/F-5917-2011; Servoli, Leonello/E-6766-2012; bertucci, bruna/J-5237-2012; Cerrada, Marcos/J-6934-2014; Gonzalez Romero, Enrique/L-7561-2014; Vogel, Helmut/N-8882-2014; Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015 OI Tsaregorodtsev, Andrei/0000-0003-4618-520X; Diemoz, Marcella/0000-0002-3810-8530; Bertucci, Bruna/0000-0001-7584-293X; Filthaut, Frank/0000-0003-3338-2247; van der Zwaan, Bob/0000-0001-5871-7643; D'Alessandro, Raffaello/0000-0001-7997-0306; Rancoita, Pier Giorgio/0000-0002-1990-4283; Arce, Pedro/0000-0003-3009-0484; Roth, Stefan/0000-0003-3616-2223; Longo, Egidio/0000-0001-6238-6787; Ambrosi, Giovanni/0000-0001-6977-9559; Leijtens, Xaveer/0000-0001-7794-8236; Ludovici, Lucio/0000-0003-1970-9960; Servoli, Leonello/0000-0003-1725-9185; Cerrada, Marcos/0000-0003-0112-1691; Gonzalez Romero, Enrique/0000-0003-2376-8920; Vogel, Helmut/0000-0002-6109-3023; Ferguson, Thomas/0000-0001-5822-3731; Berdugo, Javier/0000-0002-7911-8532 NR 25 TC 1 Z9 1 U1 2 U2 4 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 26 PY 1993 VL 313 IS 1-2 BP 326 EP 332 DI 10.1016/0370-2693(93)91229-G PG 7 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA LV189 UT WOS:A1993LV18900049 ER PT J AU KENNEL, SJ FOOTE, LJ CIMINO, L RIZZO, MG CHANG, LY SACCHI, A AF KENNEL, SJ FOOTE, LJ CIMINO, L RIZZO, MG CHANG, LY SACCHI, A TI SEQUENCE OF A CDNA-ENCODING THE BETA-4-SUBUNIT OF MURINE INTEGRIN SO GENE LA English DT Article DE LUNG CARCINOMA; SPLICE VARIANTS; GENE MAP ID MONOCLONAL-ANTIBODIES; MESSENGER-RNA; ALPHA-6-BETA-4; SUBUNIT; BETA-4; CELL; HEMIDESMOSOMES; ANTIGEN; FAMILY; RECEPTORS AB A cDNA coding for the beta4 Subunit of murine integrin (mbeta4) has been cloned and sequenced using mRNA from a murine lung carcinoma as the template. The 5' sequence contains two AUG codons, the second of which initiates synthesis of the mature protein. The cDNA sequence has an open reading frame coding for 1748 amino acids (aa), including a signal peptide, cysteine-rich region, serine- and threonine-rich region, transmembrane domain, and a cytoplasmic domain of over 1000 aa. Overall, the deduced Mbeta4 aa sequence has 88% identity with the human beta4 subunit (hbeta4) sequence deduced from the sequence of placental mRNA. Reverse transcriptase-polymerase chain reaction using primers flanking splice sites for two variant forms of hbeta4 transcripts provided evidence for alternate splicing of RNA in the murine spleen and to a lesser extent in the skin, uterus, and thymus but was found at only one of the two alternative sites. Five potential glycosylation sites present in the extracellular domain of hbeta4 are conserved in Mbeta4. One tyrosine in the terminal region of the cytoplasmic domain (position 1600) is conserved between Mbeta4 and hbeta4 and has the consensus sequence for tyrosine phosphorylation. Finally, a genomic restriction map of mbeta4 shows that the gene is about 40 kb in length. No restriction-fragment length polymorphisms were detected between BALB/c liver and BALB/c lung carcinoma DNA. C1 REGINA ELENA INST CANC RES,MOLEC ONCOGENESIS LAB,ROME,ITALY. RP KENNEL, SJ (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,MS-8077,OAK RIDGE,TN 37831, USA. NR 23 TC 17 Z9 18 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-1119 J9 GENE JI Gene PD AUG 25 PY 1993 VL 130 IS 2 BP 209 EP 216 DI 10.1016/0378-1119(93)90421-X PG 8 WC Genetics & Heredity SC Genetics & Heredity GA LV583 UT WOS:A1993LV58300007 PM 8359687 ER PT J AU RIBEIRO, EA AF RIBEIRO, EA TI QUANTITATIVE-ANALYSIS OF ENZYMATIC DIGESTS OF DNA USING GEL-ELECTROPHORESIS SO JOURNAL OF CHROMATOGRAPHY-BIOMEDICAL APPLICATIONS LA English DT Review ID AGAROSE GELS; RELATING MOBILITY; ETHIDIUM-BROMIDE; STRAND BREAKS; LENGTH; FLUORESCENCE; SEPARATION; ENDONUCLEASE; RESOLUTION; MOLECULES AB Quantitative electrophoresis of enzymic digests of DNA and its applications are reviewed. Factors affecting the overall analysis such as DNA length distribution, labels for visualizing DNA, techniques for quantitation, and electrophoresis itself are studied. Methods to analyze restriction fragments and lesions in DNA by gel electrophoresis are presented. C1 BROOKHAVEN NATL LAB, UPTON, NY 11973 USA. RP BIORAD LABS, LIFE SCI GRP, 2000 ALFRED NOBEL DR, HERCULES, CA 94547 USA. NR 43 TC 4 Z9 4 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0378-4347 J9 J CHROMATOGR-BIOMED JI J. Chromatogr.-Biomed. Appl. PD AUG 25 PY 1993 VL 618 IS 1-2 BP 181 EP 201 DI 10.1016/0378-4347(93)80034-2 PG 21 WC Chemistry, Analytical SC Chemistry GA LV658 UT WOS:A1993LV65800012 PM 8227256 ER PT J AU GEORGE, GN RICHARDS, T BARE, RE GEA, YJ PRINCE, RC STIEFEL, EI WATT, GD AF GEORGE, GN RICHARDS, T BARE, RE GEA, YJ PRINCE, RC STIEFEL, EI WATT, GD TI DIRECT OBSERVATION OF BIS-SULFUR LIGATION TO THE HEME OF BACTERIOFERRITIN SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID HORSE SPLEEN FERRITIN; AZOTOBACTER-VINELANDII; PSEUDOMONAS-AERUGINOSA; COORDINATION STRUCTURE; AXIAL LIGANDS; CYTOCHROME-F; IRON; SPECTROSCOPY; BINDING; RELEASE AB X-ray absorption spectroscopy was used to examine the ligation of the heme of Azobacter vinelandii bacterioferritin scrupulously cleaned of non-heme iron. We find that the iron of the protoporphyrin IX of the protein has two axial sulfur ligands at 2.35 angstrom, with four nitrogen ligands at 1.97 angstrom. This result confirms the previous suggestion of Cheesman et al. (Nature 1990, 346, 771-773; Biochem. J. 1992, 286, 361-367.), on the basis of less direct spectroscopic techniques, that the heme of bacterioferritin is ligated by a pair of methionine ligands. To date, this mode of coordination is unknown in any other heme protein. C1 BRIGHAM YOUNG UNIV,DEPT CHEM & BIOCHEM,PROVO,UT 84602. EXXON RES & ENGN CO,ANNANDALE,NJ 08801. RP GEORGE, GN (reprint author), STANFORD UNIV,SLAC,STANFORD SYNCHROTRON RADIAT LAB,POB 4349,BIN 69,STANFORD,CA 94309, USA. RI George, Graham/E-3290-2013 NR 31 TC 21 Z9 21 U1 0 U2 1 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 25 PY 1993 VL 115 IS 17 BP 7716 EP 7718 DI 10.1021/ja00070a015 PG 3 WC Chemistry, Multidisciplinary SC Chemistry GA LW560 UT WOS:A1993LW56000015 ER PT J AU EMSLEY, L DWYER, TJ SPIELMANN, HP WEMMER, DE AF EMSLEY, L DWYER, TJ SPIELMANN, HP WEMMER, DE TI DETERMINATION OF DNA CONFORMATIONAL FEATURES FROM SELECTIVE 2-DIMENSIONAL NMR EXPERIMENTS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TWO-DIMENSIONAL NMR; COUPLING-CONSTANTS; CORRELATION SPECTRA; CROSS-PEAKS; KARPLUS EQUATION; FILTERED COSY; SPECTROSCOPY; FRAGMENTS; SIMULATION; NETWORKS AB Selective two-dimensional NMR correlation experiments are demonstrated to be particularly well suited to the problem of obtaining quantitative three-bond coupling constants in samples of DNA. The techniques were demonstrated by obtaining high-resolution spectra of cross peaks between sugar protons, which were then iteratively fitted to simulations derived from trial coupling topologies to determine the coupling constants which contribute to the cross-peak patterns. These coupling constants were then used to determine structural parameters such as the phase angle of the deoxyribose pseudorotation and the backbone torsion angles delta and epsilon. Examples are given for both single-stranded and duplex DNA. We have studied both the unmodified 8-mer duplex d(GCGTACGC)2 and the furan-side monoadduct formed between the thymidine of one of the strands and 4'-(hydroxymethyl)-4,5',8-trimethylpsoralen (HMT) of the same DNA sequence. We comment on the structural differences between the two. C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DIV STRUCT BIOL,BERKELEY,CA 94720. UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720. RI Emsley, Lyndon/C-6108-2008 OI Emsley, Lyndon/0000-0003-1360-2572 NR 43 TC 16 Z9 16 U1 0 U2 3 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 25 PY 1993 VL 115 IS 17 BP 7765 EP 7771 DI 10.1021/ja00070a023 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA LW560 UT WOS:A1993LW56000023 ER PT J AU LIU, YP LU, DH GONZALEZLAFONT, A TRUHLAR, DG GARRETT, BC AF LIU, YP LU, DH GONZALEZLAFONT, A TRUHLAR, DG GARRETT, BC TI DIRECT DYNAMICS CALCULATION OF THE KINETIC ISOTOPE EFFECT FOR AN ORGANIC HYDROGEN-TRANSFER REACTION, INCLUDING CORNER-CUTTING TUNNELING IN 21 DIMENSIONS SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Article ID TRANSITION-STATE THEORY; POTENTIAL-ENERGY SURFACES; INTRINSIC REACTION COORDINATE; CHEMICAL-REACTION RATES; MOLECULAR-DYNAMICS; RATE CONSTANTS; UNIMOLECULAR REACTION; POLYATOMIC-MOLECULES; NDDO APPROXIMATION; COMPUTER-PROGRAM AB We have calculated the kinetic isotope effect of the reaction CF3 + CD3H by a semiclassical method that gives insight into tunneling paths for hydrogen atom transfer. In particular, tunneling is treated by a new optimized multidimensional semiclassical method which is valid even for large curvature of the reaction path, and should have wide applicability. The method used in the dynamics calculations is variational transition state theory with ground-state transmission coefficients. The torsional vibrational mode of the transition state is treated as a hindered internal rotation. The calculations are made practical for a system with 27 degrees of freedom by employing the direct dynamics approach, i.e., the force field necessary for the dynamics calculations is evaluated ''on the fly'' by using the neglect of diatomic differential overlap (NDDO) molecular orbital theory with semiempirical specific-reaction parameters (SRP), which are based on the standard AM1 parametrization adjusted to improve the agreement between experiment and the calculated quantities such as the vibrational frequencies of reactants and products and the classical barrier height. The kinetic isotope effects are calculated by. using two SRP force fields, and they are in good agreement with the experimental measurements. The picture of the corner cutting tunneling process that emerges is discussed graphically. C1 UNIV MINNESOTA, DEPT CHEM, MINNEAPOLIS, MN 55455 USA. UNIV MINNESOTA, INST SUPERCOMP, MINNEAPOLIS, MN 55455 USA. PACIFIC NW LAB, MOLEC SCI RES CTR, RICHLAND, WA 99352 USA. RI Garrett, Bruce/F-8516-2011; 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 105 TC 287 Z9 289 U1 3 U2 36 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 25 PY 1993 VL 115 IS 17 BP 7806 EP 7817 DI 10.1021/ja00070a029 PG 12 WC Chemistry, Multidisciplinary SC Chemistry GA LW560 UT WOS:A1993LW56000029 ER PT J AU BARKIGIA, KM RENNER, MW XIE, H SMITH, KM FAJER, J AF BARKIGIA, KM RENNER, MW XIE, H SMITH, KM FAJER, J TI STRUCTURAL CONSEQUENCES OF PORPHYRIN TAUTOMERIZATION - MOLECULAR-STRUCTURE OF A ZINC ISOPORPHYRIN SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY LA English DT Note ID INTERMEDIATE NEGLECT; DIFFERENTIAL OVERLAP; CRYSTAL-STRUCTURE; PI-CATIONS; STEREOCHEMISTRY; STATES; COMPLEXES; RADICALS; BOND C1 BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA. UNIV CALIF DAVIS, DEPT CHEM, DAVIS, CA 95616 USA. RI Smith, Kevin/G-1453-2011 OI Smith, Kevin/0000-0002-6736-4779 NR 28 TC 38 Z9 38 U1 0 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0002-7863 J9 J AM CHEM SOC JI J. Am. Chem. Soc. PD AUG 25 PY 1993 VL 115 IS 17 BP 7894 EP 7895 DI 10.1021/ja00070a052 PG 2 WC Chemistry, Multidisciplinary SC Chemistry GA LW560 UT WOS:A1993LW56000052 ER PT J AU ALLEN, MJ DONG, XF ONEILL, TE YAU, P KOWALCZYKOWSKI, SC GATEWOOD, J BALHORN, R BRADBURY, EM AF ALLEN, MJ DONG, XF ONEILL, TE YAU, P KOWALCZYKOWSKI, SC GATEWOOD, J BALHORN, R BRADBURY, EM TI ATOMIC-FORCE MICROSCOPE MEASUREMENTS OF NUCLEOSOME CORES ASSEMBLED ALONG DEFINED DNA-SEQUENCES SO BIOCHEMISTRY LA English DT Note ID MOLECULES; HISTONES; PARTICLE; PROTEIN; CELLS; MODEL AB We have found that the atomic force microscope (AFM) can be used to image the ''beads-on-a-string'' chromatin structure in a normal air environment following adsorption onto a cover glass substrate. Individual nucleosome cores and linker DNA could be resolved clearly along chromatin fibers that were reconstituted using histone octamers and a tandemly repeated 208-bp nucleosome positioning DNA sequence (208-18). AFM measurements showed that the compaction of the 3780-bp DNA by different loadings of histone octamers was consistent with 146 bp of DNA wrapped 1.75 turns about the histone octamer to form the 11-nm nucleosome core. Precise internucleosome core spacing measurements could be performed along the chromatin fiber axis. In other experiments, AFM images of chromatin reconstituted using closed circular DNA showed highly tangled beaded fibers, as expected. These images and measurements demonstrate that AFM can provide useful high-resolution structural information about chromatin that can be used to complement other more established techniques such as electron microscopy. C1 UNIV CALIF DAVIS,DEPT MICROBIOL,DAVIS,CA 95616. LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94550. LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545. RP ALLEN, MJ (reprint author), UNIV CALIF DAVIS,SCH MED,DEPT BIOL CHEM,DAVIS,CA 95616, USA. FU NIAID NIH HHS [AI-18987]; NIGMS NIH HHS [GM-26901] NR 34 TC 86 Z9 87 U1 4 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0006-2960 J9 BIOCHEMISTRY-US JI Biochemistry PD AUG 24 PY 1993 VL 32 IS 33 BP 8390 EP 8396 DI 10.1021/bi00084a002 PG 7 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA LW559 UT WOS:A1993LW55900002 PM 8357790 ER PT J AU KUSTHARDT, U HEDMAN, B HODGSON, KO HAHN, R VILTER, H AF KUSTHARDT, U HEDMAN, B HODGSON, KO HAHN, R VILTER, H TI HIGH-RESOLUTION XANES STUDIES ON VANADIUM-CONTAINING HALOPEROXIDASE - PH-DEPENDENCE AND SUBSTRATE-BINDING SO FEBS LETTERS LA English DT Article DE VANADIUM; HALOPEROXIDASE; XAS; XANES; ASCOPHYLLUM-NODOSUM ID ASCOPHYLLUM-NODOSUM; ABSORPTION-SPECTRA; BROMOPEROXIDASE; EDGE; PEROXIDASE; CHEMISTRY; COMPLEXES AB High-resolution X-ray absorption vanadium K-edge spectra were recorded for samples of vanadium-containing bromoperoxidase from the brown alga, Ascophyllum nodosum at pH 9, 7, 5 and 4, as well as for enzyme samples containing the substrates, hydrogen peroxide and bromide. The well-resolved features of the XANES spectra are discussed. The pH-dependence of the structure of the active site has been studied revealing no significant change of the absorption features. We were able to detect an interaction of H2O2 with the vanadium site of the bromoperoxidase using XAS spectroscopy, whereas addition of bromide causes no energy shift of the XANES spectrum. The possible role of vanadium during the enzymatic reaction is discussed on the basis of our results. C1 STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305. STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305. GESELL BIOTECHNOL FORSCH MBH,D-38124 BRAUNSCHWEIG,GERMANY. RP KUSTHARDT, U (reprint author), TECH UNIV MUNICH,LEHRSTUHL ANORGAN CHEM 1,LICHTENBERGSTR 4,D-85748 GARCHING,GERMANY. OI Vilter, Hans/0000-0001-6266-2729 NR 18 TC 23 Z9 23 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0014-5793 J9 FEBS LETT JI FEBS Lett. PD AUG 23 PY 1993 VL 329 IS 1-2 BP 5 EP 8 DI 10.1016/0014-5793(93)80180-3 PG 4 WC Biochemistry & Molecular Biology; Biophysics; Cell Biology SC Biochemistry & Molecular Biology; Biophysics; Cell Biology GA LT841 UT WOS:A1993LT84100002 PM 8354407 ER PT J AU LASCIALFARI, A BORSA, F GHIGNA, P TORGESON, DR ZIOLO, J CHOU, F JOHNSTON, DC AF LASCIALFARI, A BORSA, F GHIGNA, P TORGESON, DR ZIOLO, J CHOU, F JOHNSTON, DC TI CU SPIN DYNAMICS AND MAGNETIC QUASI-PARTICLES IN LA2-XSRXCUO4 - A LA-139 NQR INVESTIGATION SO JOURNAL OF PHYSICS-CONDENSED MATTER LA English DT Article; Proceedings Paper CT INTERNATIONAL SYMP ON POTENTIALS AND CORRELATIONS IN THE PHYSICS OF CONDENSED MATTER, IN HONOR OF MARIO P TOSI CY SEP 21-23, 1992 CL PAVIA, ITALY ID PHASE-DIAGRAM; SUPERCONDUCTORS; RELAXATION; LA2CUO4 AB La-139 NQR spectra and relaxation measurements in the La2-xSrxCuO4 (LSCO) system are presented for x < 0.02. In this compound the introduction of electronic holes in the planar antiferromagnet (AF) La2CuO4 by Sr doping and/or excess oxygen drastically reduces the temperature of ordering TN whereby for x greater-than-or-equal-to 0.02 the long-range AF order is totally suppressed. For 0.02 < x < 0.08, LSCO systems display 2D short-range AF correlations in regions of mesoscopic size leading to an unconventional spin glass phase at low temperature (T < 15 K). For x < 0.02 the system is in a doped Neel state, and at low temperature critical effects are observed, probably involving magnetic quasi-particles introduced by holes. Furthermore we find for T > 200 K a relaxation contribution due to excess O, and this phenomenon is related to the phase separation which leads to a superconducting phase for appropriate O doping of La2CuO4. C1 DEPT PHYS,AMES,IA 50011. AMES LAB,AMES,IA 50011. UNIV PAVIA,DIPARTIMENTO CHIM FIS,I-27100 PAVIA,ITALY. UNIV PAVIA,CNR,CSTE,I-27100 PAVIA,ITALY. RP LASCIALFARI, A (reprint author), UNIV PAVIA,DIPARTIMENTO FIS A VOLTA,I-27100 PAVIA,ITALY. RI Ghigna, Paolo/G-8193-2011 NR 12 TC 2 Z9 2 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX SN 0953-8984 J9 J PHYS-CONDENS MAT JI J. Phys.-Condes. Matter PD AUG 23 PY 1993 VL 5 SU 34B BP B19 EP B24 DI 10.1088/0953-8984/5/34B/004 PG 6 WC Physics, Condensed Matter SC Physics GA LV247 UT WOS:A1993LV24700005 ER PT J AU GIELE, WT GLOVER, EWN KOSOWER, DA AF GIELE, WT GLOVER, EWN KOSOWER, DA TI HIGHER-ORDER CORRECTIONS TO JET CROSS-SECTIONS IN HADRON COLLIDERS SO NUCLEAR PHYSICS B LA English DT Article ID LEADING-LOGARITHM CALCULATION; VACUUM POLARIZATION DIAGRAMS; LARGE TRANSVERSE-MOMENTUM; PARTON PROCESSES; GAUGE-THEORIES; ANNIHILATION PROCESSES; HELICITY AMPLITUDES; GLUON SCATTERING; E+E-ANNIHILATION; MASS DIVERGENCES AB We describe a general method of calculating the fully differential cross section for the production of jets at next-to-leading order in a hadron collider. This method is based on a ''crossing'' of next-to-leading order calculations with all partons in the final state. The method introduces universal crossing functions that allow a modular approach to next-to-leading order calculations for any process with initial state partons. These techniques are applied to the production of jets in association with a vector boson including all decay correlations of the final state observables. C1 UNIV DURHAM,DEPT PHYS,DURHAM DH1 3LE,ENGLAND. CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND. CTR ETUD SACLAY,SERV PHYS THEOR,F-91191 GIF SUR YVETTE,FRANCE. RP GIELE, WT (reprint author), FERMILAB NATL ACCELERATOR LAB,POB 500,BATAVIA,IL 60510, USA. RI Glover, Edward/A-4597-2012 OI Glover, Edward/0000-0002-0173-4175 NR 68 TC 420 Z9 421 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 23 PY 1993 VL 403 IS 3 BP 633 EP 667 DI 10.1016/0550-3213(93)90365-V PG 35 WC Physics, Particles & Fields SC Physics GA LT744 UT WOS:A1993LT74400005 ER PT J AU LUO, XC SCHRAMM, DN AF LUO, XC SCHRAMM, DN TI TESTING FOR THE GAUSSIAN NATURE OF COSMOLOGICAL DENSITY PERTURBATIONS THROUGH THE 3-POINT TEMPERATURE CORRELATION-FUNCTION SO PHYSICAL REVIEW LETTERS LA English DT Article ID DIFFERENTIAL MICROWAVE RADIOMETER; INFLATIONARY UNIVERSE SCENARIO; RADIATION ANISOTROPY; FLUCTUATIONS; EVOLUTION; FLATNESS; SYMMETRY; HORIZON; STRINGS; MODELS AB One of the crucial aspects of density perturbations that are produced by the standard inflation scenario is that they are Gaussian where seeds produced by topological defects tend to be non-Gaussian. The three-point correlation function of the temperature anisotropy of the cosmic microwave background radiation (CBR) provides a sensitive test of this aspect of the primordial density field. In this paper, this function is calculated in the general context of various allowed non-Gaussian models. It is shown that the Cosmic Background Explorer and the forthcoming South Pole and balloon CBR anisotropy data may be able to provide a crucial test of the Gaussian nature of the perturbations. C1 UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637. FERMILAB NATL ACCELERATOR LAB,NASA FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510. RP LUO, XC (reprint author), UNIV CHICAGO,ENRICO FERMI INST,DEPT PHYS,CHICAGO,IL 60637, USA. NR 40 TC 51 Z9 51 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 23 PY 1993 VL 71 IS 8 BP 1124 EP 1127 DI 10.1103/PhysRevLett.71.1124 PG 4 WC Physics, Multidisciplinary SC Physics GA LU280 UT WOS:A1993LU28000002 ER PT J AU RANDALL, KJ KILCOYNE, ALD KOPPE, HM FELDHAUS, J BRADSHAW, AM RUBENSSON, JE EBERHARDT, W XU, Z JOHNSON, PD MA, Y AF RANDALL, KJ KILCOYNE, ALD KOPPE, HM FELDHAUS, J BRADSHAW, AM RUBENSSON, JE EBERHARDT, W XU, Z JOHNSON, PD MA, Y TI PHOTON ENERGY-DEPENDENCE OF THE HIGH RESOLUTION-C 1S PHOTOELECTRON-SPECTRUM OF CO IN THE THRESHOLD REGION SO PHYSICAL REVIEW LETTERS LA English DT Article ID VIBRATIONALLY RESOLVED PHOTOELECTRON; SHELL PHOTOIONIZATION; BRANCHING RATIOS; N2; IONIZATION; STATE; AUGER; SATELLITES; MOLECULES; CHANNEL AB The C 1s photoelectron spectrum of CO has been measured with high resolution in the threshold region. The data exhibit hitherto unresolved vibrational structure on the C 1s main photoelectron line as well as new features in the satellite region. The vibrational energy of the CO+ ion is 301 +/- 3 meV. The vibrational structure changes dramatically with photon energy due to the influence of the sigma* shape resonance. The new satellite lines which are not present at high photon energies are attributed to conjugate shakeup processes. C1 FRITZ HABER INST, D-14195 BERLIN, GERMANY. FORSCHUNGSZENTRUM JULICH, FORSCHUNGSZENTRUM JULICH, INST FESTKORPERFORSCH, D-52425 JULICH, GERMANY. BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA. PACIFIC NW LAB, RICHLAND, WA 99352 USA. RI Feldhaus, Josef/C-1130-2014; Kilcoyne, David/I-1465-2013 NR 27 TC 71 Z9 71 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 23 PY 1993 VL 71 IS 8 BP 1156 EP 1159 DI 10.1103/PhysRevLett.71.1156 PG 4 WC Physics, Multidisciplinary SC Physics GA LU280 UT WOS:A1993LU28000010 ER PT J AU WANG, CZ HO, KM AF WANG, CZ HO, KM TI STRUCTURE, DYNAMICS, AND ELECTRONIC-PROPERTIES OF DIAMOND-LIKE AMORPHOUS-CARBON SO PHYSICAL REVIEW LETTERS LA English DT Article ID SIMULATIONS; GROWTH; FILMS AB An amorphous carbon network generated by quenching high-density high-temperature liquid carbon using tight-binding molecular-dynamics simulation is found to contain a large fraction of tetrahedral bonding sites. Investigations of the structural, vibrational, and electronic properties of the theoretical model provide fresh insights into the microscopic structure of diamondlike amorphous carbon films produced in ion-beam deposition experiments. C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011. RP WANG, CZ (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA. NR 17 TC 207 Z9 210 U1 0 U2 26 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 23 PY 1993 VL 71 IS 8 BP 1184 EP 1187 DI 10.1103/PhysRevLett.71.1184 PG 4 WC Physics, Multidisciplinary SC Physics GA LU280 UT WOS:A1993LU28000017 ER PT J AU WOICIK, JC KENDELEWICZ, T HERRERAGOMEZ, A MIYANO, KE COWAN, PL BOULDIN, CE PIANETTA, P SPICER, WE AF WOICIK, JC KENDELEWICZ, T HERRERAGOMEZ, A MIYANO, KE COWAN, PL BOULDIN, CE PIANETTA, P SPICER, WE TI IN/SI(111)-ROOT-3X-ROOT-3 INTERFACE - AN UNRELAXED T(4) GEOMETRY SO PHYSICAL REVIEW LETTERS LA English DT Article ID ABSORPTION FINE-STRUCTURE; SURFACE AB Back reflection x-ray standing waves and surface extended x-ray absorption fine structure have determined the atomic coordinates (i.e., the perpendicular displacement and the near-neighbor bond lengths) at the In/Si(111)-square-root 3 x square-root 3 interface. Although the In adatoms are found to reside at a single position, 2.10 +/- 0.06 angstrom above the first Si bilayer, dual In-Si near-neighbor distances are found: 2.73 +/- 0.02 angstrom to the first- and 2.49 +/- 0.03 angstrom to the second-layer Si atoms, respectively. Contrary to the accepted model, our data suggest that the T4 geometry is not relaxed. C1 STANFORD UNIV,STANFORD ELECTR LABS,STANFORD,CA 94305. TULANE UNIV,DEPT PHYS,NEW ORLEANS,LA 70118. ARGONNE NATL LAB,ARGONNE,IL 60439. RP WOICIK, JC (reprint author), NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899, USA. NR 15 TC 31 Z9 31 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 23 PY 1993 VL 71 IS 8 BP 1204 EP 1207 DI 10.1103/PhysRevLett.71.1204 PG 4 WC Physics, Multidisciplinary SC Physics GA LU280 UT WOS:A1993LU28000022 ER PT J AU VINOKUR, VM GESHKENBEIN, VB FEIGELMAN, MV BLATTER, G AF VINOKUR, VM GESHKENBEIN, VB FEIGELMAN, MV BLATTER, G TI SCALING OF THE HALL RESISTIVITY IN HIGH-T(C) SUPERCONDUCTORS SO PHYSICAL REVIEW LETTERS LA English DT Article ID VORTEX MOTION; TRANSITION; YBA2CU3O7; STATE AB A scaling behavior of the Hall resistivity in a mixed state of high-T(c) superconductors is shown to be a general feature of any vortex state with disorder-dominated dynamics (thermally assisted flux flow, vortex glass, etc.). The universal scaling law rho(xy) is-proportional-to rho(xx)2 is found. The presented theory agrees with recent experimental data. C1 SWISS FED INST TECHNOL,CH-8093 ZURICH,SWITZERLAND. LANDAU THEORET PHYS INST,MOSCOW,RUSSIA. CEA SACLAY,ORME MERISIERES,SERV PHYS ETAT CONDENSE,F-91191 GIF SUR YVETTE,FRANCE. ASEA BROWN BOVERY,CORP RES,CH-5405 BADEN,SWITZERLAND. RP VINOKUR, VM (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA. RI Feigelman, Mikhail/M-4113-2013 NR 22 TC 182 Z9 183 U1 1 U2 8 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 23 PY 1993 VL 71 IS 8 BP 1242 EP 1245 DI 10.1103/PhysRevLett.71.1242 PG 4 WC Physics, Multidisciplinary SC Physics GA LU280 UT WOS:A1993LU28000032 ER PT J AU FOSTER, CM GRIMSDITCH, M LI, Z KARPOV, VG AF FOSTER, CM GRIMSDITCH, M LI, Z KARPOV, VG TI RAMAN LINE-SHAPES OF ANHARMONIC PHONONS SO PHYSICAL REVIEW LETTERS LA English DT Article ID ZONE-CENTER PHONONS; PBTIO3; SPECTRUM; FERROELECTRICITY; PRESSURE; SILICON; MODES AB Anharmonic effects in crystals typically result in the symmetric broadening of the single-phonon Lorentzian line shape. However, a simple model, based on consideration of a highly anharmonic potential, shows that anharmonicity can lead not only to asymmetric line shapes but also to line shapes composed of multiple subpeaks. Experimental Raman data on the soft A1(TO) phonon in ferroelectric PbTiO3 indicates that this mode does indeed consist of a series of subpeaks whose intensities are accurately predicted (with no fitting parameters) by our model. RP FOSTER, CM (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA. RI Karpov, Victor/I-5169-2012; OI Karpov, Victor/0000-0003-2558-8368 NR 26 TC 32 Z9 33 U1 0 U2 6 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0031-9007 J9 PHYS REV LETT JI Phys. Rev. Lett. PD AUG 23 PY 1993 VL 71 IS 8 BP 1258 EP 1260 DI 10.1103/PhysRevLett.71.1258 PG 3 WC Physics, Multidisciplinary SC Physics GA LU280 UT WOS:A1993LU28000036 ER PT J AU KLEIN, W RUNDLE, J AF KLEIN, W RUNDLE, J TI SELF-ORGANIZED CRITICALITY IN A CONTINUOUS, NONCONSERVATIVE CELLULAR AUTOMATION MODELING EARTHQUAKES - COMMENT SO PHYSICAL REVIEW LETTERS LA English DT Letter C1 BOSTON UNIV,DEPT PHYS,BOSTON,MA 02215. LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550. RP KLEIN, W (reprint author), BOSTON UNIV,CTR POLYMER PHYS,BOSTON,MA 02215, USA. NR 1 TC 16 Z9 17 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 23 PY 1993 VL 71 IS 8 BP 1288 EP 1288 DI 10.1103/PhysRevLett.71.1288 PG 1 WC Physics, Multidisciplinary SC Physics GA LU280 UT WOS:A1993LU28000047 ER PT J AU HAGAMAN, EW LEE, SK AF HAGAMAN, EW LEE, SK TI INTRODUCTION OF FLUORINE INTO COALS USING N-FLUOROBENZENE-SULFONIMIDE 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 1 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101523 ER PT J AU HAGAMAN, EW AF HAGAMAN, EW TI SUBSTRUCTURE-ANALYSIS BY SOLID-STATE H-1-C-13-F-19 DOUBLE CROSS-POLARIZATION C-13 CP MAS NMR 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 2 EP FLUO PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101505 ER PT J AU MITRAKIRTLEY, S MULLINS, OC VANELP, J CRAMER, SP AF MITRAKIRTLEY, S MULLINS, OC VANELP, J CRAMER, SP TI NITROGEN XANES STUDIES OF ARGONNE COALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. ROSE HULMAN INST TECHNOL,TERRE HAUTE,IN 47803. SCHLUMBERGER DOLL RES CTR,RIDGEFIELD,CT 06877. UNIV CALIF DAVIS,DAVIS,CA 95616. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 2 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101524 ER PT J AU WISE, MB GUERIN, MR THOMPSON, CV BUCHANAN, MV AF WISE, MB GUERIN, MR THOMPSON, CV BUCHANAN, MV TI DIRECT SAMPLING ION-TRAP MASS-SPECTROMETRY FOR RAPID ENVIRONMENTAL-ANALYSIS 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 2 EP ENVR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101370 ER PT J AU MIZUSAWA, EA DALEY, PF KYLE, KR LANGRY, KC ANGEL, SM AF MIZUSAWA, EA DALEY, PF KYLE, KR LANGRY, KC ANGEL, SM TI THERMOELECTRIC COOLED, PURGE-AND-TRAP DEVICE FOR ENHANCING THE SENSITIVITY OF A REVERSIBLE, FIBER OPTIC, CARBON-TETRACHLORIDE SENSOR 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 3 EP ENVR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101371 ER PT J AU PALMER, PD CLARK, DL NEWTON, TW AF PALMER, PD CLARK, DL NEWTON, TW TI O-17 AND C-13 NMR-STUDIES OF URANYL AND NEPTUNYL CARBONATE COMPLEXES IN NEAR-NEUTRAL SOLUTION 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 1 Z9 1 U1 2 U2 5 PU AMER CHEMICAL SOC PI WASHINGTON 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 3 EP TECH PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100977 ER PT J AU CLARK, SB BAJT, S SUTTON, SR RIVERS, M LANGTON, CA AF CLARK, SB BAJT, S SUTTON, SR RIVERS, M LANGTON, CA TI IN-SITU QUANTIFICATION OF TRACE-METAL SPECIES IN MATRICES OF ENVIRONMENTAL INTEREST SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV GEORGIA,SAVANNAH RIVER ECOL LAB,AIKEN,SC 29802. UNIV CHICAGO,DEPT GEOPHYS SCI,CHICAGO,IL 60637. UNIV CHICAGO,CTR ADV RADIAT SOURCES,CHICAGO,IL 60637. BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973. WESTINGHOUSE SAVANNAH RIVER CO,SAVANNAH RIVER TECHNOL CTR,AIKEN,SC 29808. RI Bajt, Sasa/G-2228-2010 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 4 EP ENVR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101372 ER PT J AU DIETZ, ML HORWITZ, EP RHOADS, SM FELINTO, C GALE, NH AF DIETZ, ML HORWITZ, EP RHOADS, SM FELINTO, C GALE, NH TI SEPARATION AND PRECONCENTRATION OF LEAD FROM ACIDIC MEDIA BY EXTRACTION CHROMATOGRAPHY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 UNIV OXFORD ISOTRACE LAB,DEPT NUCL PHYS,OXFORD OX1 3RH,ENGLAND. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. RI Felinto, Maria/H-2347-2014 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 4 EP IEC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101762 ER PT J AU GRUEN, DM AF GRUEN, DM TI MATERIALS CHEMISTRY FROM A NATIONAL LABORATORY PERSPECTIVE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439. ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 5 EP MTLS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32201802 ER PT J AU OCKO, BM WANG, J WATSON, GW AF OCKO, BM WANG, J WATSON, GW TI THE ATOMIC-STRUCTURE OF ELECTRODE SURFACES 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 5 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200758 ER PT J AU CASTRO, A SHERA, B AF CASTRO, A SHERA, B TI SINGLE-MOLECULE ELECTROPHORESIS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV PHYS,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 6 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100345 ER PT J AU TIDSWELL, IM MARKOVIC, NM ROSS, PN AF TIDSWELL, IM MARKOVIC, NM ROSS, PN TI IN-SITU X-RAY-SCATTERING FROM PT(100) AND (111) ELECTRODE SURFACES - ADSORPTION AND RELAXATION 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 6 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200759 ER PT J AU CHEN, ZH SACHLEBEN, RA AF CHEN, ZH SACHLEBEN, RA TI STEREOCHEMISTRY OF SUBSTITUTED DIBENZO-14-CROWN-4 ETHERS AND THEIR COMPLEXES OF LI+ AND NA+ - A 1D AND 2D NMR 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. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 8 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100347 ER PT J AU FOREMAN, TM SAUER, NN SMITH, BF ROBISON, TW AF FOREMAN, TM SAUER, NN SMITH, BF ROBISON, TW TI RECOVERY OF TIN FROM ELECTROPLATING BATHS USING WATER-SOLUBLE POLYMERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV ISOTOPE & NUCL CHEM,LOS ALAMOS,NM 87545. LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,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 8 EP TECH PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100982 ER PT J AU WOODRING, JL AF WOODRING, JL TI INDUSTRIAL-HYGIENE OF SELECTED HEAVY-METALS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 ARGONNE NATL LAB,DIV ENVIRONM SAFETY & HLTH,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 9 EP CHAS PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100886 ER PT J AU CISNEROS, PE MAHAN, C APEL, C AF CISNEROS, PE MAHAN, C APEL, C TI EVALUATION OF A MULTISURFACE AEROSOL 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 10 EP TECH PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100984 ER PT J AU YOUNG, RA BAST, CB ROSS, RH LU, PY AF YOUNG, RA BAST, CB ROSS, RH LU, PY TI METAL SPECIATION - IMPLICATIONS FOR RISK ASSESSMENT SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37830. RI Bast, Cheryl/B-9436-2012 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 10 EP CHAS PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100887 ER PT J AU BURNS, CJ FRANKCOM, TM GORDON, PL SAUER, NN AF BURNS, CJ FRANKCOM, TM GORDON, PL SAUER, NN TI SOME POTENTIAL STRATEGIES FOR THE TREATMENT OF WASTE URANIUM METAL AND URANIUM ALLOYS 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 1 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 11 EP TECH PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100985 ER PT J AU KELLEY, SS RIALS, TG AF KELLEY, SS RIALS, TG TI THERMAL AND MECHANICAL-PROPERTIES OF CELLULOSE MIXED ESTER COPOLYMERS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401. SO FORESTRY EXPT STN,PINEVILLE,LA 71360. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 11 EP CELL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100559 ER PT J AU GATROUSIS, C AF GATROUSIS, C TI RESEARCH AT CLARK IN THE EARLY 60S AND AT LLNL IN THE LATE 80S SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LLNL,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 13 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200013 ER PT J AU XANTHEAS, SS DUNNING, TH AF XANTHEAS, SS DUNNING, TH TI AB-INITIO STUDIES OF WATER AND NEGATIVE ION-WATER CLUSTERS 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 Xantheas, Sotiris/L-1239-2015 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 13 EP COMP PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101267 ER PT J AU JODY, BJ DANIELS, EJ BONSIGNORE, P AF JODY, BJ DANIELS, EJ BONSIGNORE, P TI A PROCESS TO RECOVER PLASTICS FROM OBSOLETE AUTOMOBILES USING SOLVENTS AT AMBIENT-PRESSURE 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 14 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101534 ER PT J AU MARSICK, DJ AF MARSICK, DJ TI THE USE OF AN IN HOUSE REPORTING SYSTEM TO ANALYZE ACCIDENTAL CHEMICAL-EXPOSURE AMONG HAZARDOUS-WASTE WORKERS 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 15 EP CHAS PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100892 ER PT J AU COLUMBIA, MR JENSEN, MB MYLER, U THIEL, PA AF COLUMBIA, MR JENSEN, MB MYLER, U THIEL, PA TI MODEL STUDIES OF FORMIC-ACID ON PT(111) AND THE EFFECT OF CO-ADSORBATES 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 16 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200768 ER PT J AU ELIAS, G FILBY, CW AF ELIAS, G FILBY, CW TI MEASUREMENT AND ANALYSIS OF RADIATION-EXPOSED HUMAN BIOASSAY SAMPLES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 WESTINGHOUSE IDAHO NUCL CO,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 16 EP CHAS PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100893 ER PT J AU MUSTAFA, MG BLANN, M PEILERT, G AF MUSTAFA, MG BLANN, M PEILERT, G TI DYNAMICAL-STATISTICAL APPROACH TO FRAGMENTATION 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 17 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200017 ER PT J AU SCHRIESHEIM, A AF SCHRIESHEIM, A TI THE CHANGING-ROLE OF THE NATIONAL LABORATORIES 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 17 EP IEC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101774 ER PT J AU YOUNG, RA ROSS, RH LU, PY AF YOUNG, RA ROSS, RH LU, PY TI A SITE-SPECIFIC RISK VALUE FOR INSOLUBLE INORGANIC MERCURY IN FLOODPLAIN SOIL AND SEDIMENT SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,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 17 EP CHAS PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100894 ER PT J AU VORRES, KS AF VORRES, KS TI ION-EXCHANGE PROPERTIES OF LOW-RANK PREMIUM COALS 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 21 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101541 ER PT J AU ABE, H CHEUNG, TK BELL, AT AF ABE, H CHEUNG, TK BELL, AT TI HYDROTREATING OF QUINOLINE AND THIOPHENE OVER TRANSITION-METAL NITRIDE CATALYSTS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 23 EP PETR PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200644 ER PT J AU HENSON, BF ROBINSON, JM AF HENSON, BF ROBINSON, JM TI SURFACE STUDIES OF SIMULATED STRATOSPHERIC ACID WATER ICES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,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 23 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200775 ER PT J AU SCHENTER, GK MESSINA, M GARRETT, BC AF SCHENTER, GK MESSINA, M GARRETT, BC TI CENTROID DENSITY QUANTUM RATE THEORY - VARIATIONAL AND DYNAMICAL METHODS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA. RI Schenter, Gregory/I-7655-2014 OI Schenter, Gregory/0000-0001-5444-5484 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 27 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200779 ER PT J AU BARTELS, DM AF BARTELS, DM TI EPR MEASUREMENT OF THE DIFFUSION OF H-ATOMS AND D-ATOMS IN ICE 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 28 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200780 ER PT J AU STEPHENS, FS AF STEPHENS, FS TI GAMMASPHERE - STATUS AND NEW RESULTS 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 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 28 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200028 ER PT J AU WONG, J AF WONG, J TI WORKFORCE-2000, AN ASIAN PERSPECTIVE 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 28 EP IEC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101784 ER PT J AU JONES, E KENSINGTON, K AF JONES, E KENSINGTON, K TI SPENT ACID RECOVERY USING THE WADR PROCESS SYSTEM SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 BATTELLE MEM INST,PNL,RICHLAND,WA 99352. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 31 EP ENVR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101399 ER PT J AU PORTER, JD ROBINSON, TO ZINN, AS AF PORTER, JD ROBINSON, TO ZINN, AS TI EXPERIMENTAL STUDIES OF STRUCTURING ON BOTH SIDES OF METAL LIQUID INTERFACES 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,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 32 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200784 ER PT J AU HUNTLEY, DR AF HUNTLEY, DR TI PATTERNS OF REACTIVITY FOR NI(110) WITH ORGANOSULFUR COMPOUNDS 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 35 EP PETR PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200656 ER PT J AU SCHLYER, DJ AF SCHLYER, DJ TI LABORATORY AND CYCLOTRON REQUIREMENTS FOR PET 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 3 Z9 3 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 35 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200034 ER PT J AU FELLER, DF GLENDENING, ED AF FELLER, DF GLENDENING, ED TI REQUIREMENTS FOR ACCURATE AB-INITIO MODELING OF WATER-WATER AND WATER-ALKALI METAL-CATIONS 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 36 EP COMP PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101290 ER PT J AU HESS, AC AF HESS, AC TI THEORETICAL INVESTIGATIONS OF THE PHYSICS AND CHEMISTRY OF THE MINERAL-WATER INTERFACE 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 36 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200788 ER PT J AU LIGHTWAHL, KJ SCHWARTZ, BL SMITH, RD AF LIGHTWAHL, KJ SCHWARTZ, BL SMITH, RD TI ELECTROSPRAY-IONIZATION MASS-SPECTROMETRY INTERFACE EFFECTS ON NONCOVALENT BIOCHEMICAL-COMPLEXES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 PACIFIC NW LAB, 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 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 36 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100374 ER PT J AU MULLINS, DR LYMAN, PF AF MULLINS, DR LYMAN, PF TI THE ADSORPTION AND REACTION OF METHANETHIOL ON CLEAN AND MODIFIED W(001) AND RU(0001) 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 36 EP PETR PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200657 ER PT J AU MCCARTHY, MI AF MCCARTHY, MI TI MODELING THE CHEMISTRY AT MINERAL INTERFACES 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 38 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200790 ER PT J AU KHOO, TL AF KHOO, TL TI DECAY OF SUPERDEFORMED BANDS 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 42 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200041 ER PT J AU DELEPLANQUE, MA AF DELEPLANQUE, MA TI LINKING TRANSITIONS IN SUPERDEFORMED NUCLEI - 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 43 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200042 ER PT J AU CARPENTER, MP JANSSENS, RVF AHMAD, I CROWELL, B HARFENIST, S HENRY, RG KHOO, TL LAURITSEN, T AF CARPENTER, MP JANSSENS, RVF AHMAD, I CROWELL, B HARFENIST, S HENRY, RG KHOO, TL LAURITSEN, T TI NEW RESULTS ON SUPERDEFORMED STATES IN HG-190 SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RI Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 44 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200043 ER PT J AU BECKER, JA HENRY, EA KUHNERT, A HUGHES, JR BRINKMAN, MJ WANG, TF STOYER, MA YATES, SW DIAMOND, RM STEPHENS, FS DELEPLANQUE, MA MACCHIAVELLI, AO FALLON, P LEE, IY OLIVIERA, J DRAPER, JP KELLY, W VO, DT CIZEWSKI, JA BERNSTEIN, LA AF BECKER, JA HENRY, EA KUHNERT, A HUGHES, JR BRINKMAN, MJ WANG, TF STOYER, MA YATES, SW DIAMOND, RM STEPHENS, FS DELEPLANQUE, MA MACCHIAVELLI, AO FALLON, P LEE, IY OLIVIERA, J DRAPER, JP KELLY, W VO, DT CIZEWSKI, JA BERNSTEIN, LA TI NUCLEAR-LEVEL LIFETIMES IN THE A = 194 REGION SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LLNL,LIVERMORE,CA 94550. LBL,BERKELEY,CA 94720. RUTGERS UNIV,NEW BRUNSWICK,NJ 08855. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 46 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200045 ER PT J AU KIM, SY BAE, IT SANDIFER, M TRYK, D CARR, R ANTONIO, MR SCHERSON, DA AF KIM, SY BAE, IT SANDIFER, M TRYK, D CARR, R ANTONIO, MR SCHERSON, DA TI IN-SITU EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE OF AN IRON PORPHYRIN 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. STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305. RI Tryk, Donald/D-5931-2012 OI Tryk, Donald/0000-0003-4660-9674 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 46 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200798 ER PT J AU BUELOW, SJ AF BUELOW, SJ TI DESTRUCTION OF EXPLOSIVES AND PROPELLANTS BY HYDROTHERMAL PROCESSING SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LOS ALAMOS NATL LAB,DIV CHEM & LASER SCI,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 49 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200801 ER PT J AU SKULSKI, W TSO, K AF SKULSKI, W TSO, K TI STUDY OF THE 40 AND 60 MEV/A XE129+AL-27 (NAT)CU, Y-89, HO-165, AND AU-197 REACTIONS - REACTION-MECHANISM AND SEARCH FOR EXOTIC SHAPES 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 51 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200050 ER PT J AU MELIUS, CF AF MELIUS, CF TI SOLVENT EFFECTS ON THE CHEMICAL-REACTION MECHANISMS OF HAZARDOUS-WASTE REMOVAL SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94550. SANDIA NATL LABS,CTR COMPUTAT ENGN,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 52 EP PHYS PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200804 ER PT J AU PLADALMAU, A BROSS, AD KEMP, FL AF PLADALMAU, A BROSS, AD KEMP, FL TI SYNTHESIS OF COMPOUNDS SHOWING ESIPT FOR PLASTIC SCINTILLATION APPLICATIONS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 52 EP CHED PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100679 ER PT J AU BUTLER, PD MAGID, LJ HAYTER, JB HAMILTON, WA AF BUTLER, PD MAGID, LJ HAYTER, JB HAMILTON, WA TI SIZE AND FLEXIBILITY OF CETYLTRIMETHYLAMMONIUM 3,5-DICHLOROBENZOATE MICELLES SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831. UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996. UNIV KENTUCKY,OFF VICE PRESIDENT RES & GRAD STUDIES,LEXINGTON,KY 40506. RI Butler, Paul/D-7368-2011 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 54 EP COLL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101082 ER PT J AU FAULON, JL CARLSON, GA HATCHER, PG AF FAULON, JL CARLSON, GA HATCHER, PG TI IS THERE ANY ORDER IN THE STRUCTURE OF LIGNIN SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87110. PENN STATE UNIV,UNIV PK,PA 16802. 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 54 EP GEOC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101686 ER PT J AU KOONTZ, SL CROSS, JB AF KOONTZ, SL CROSS, JB TI THE MATERIALS CHEMISTRY OF ATOMIC OXYGEN - LOW-EARTH-ORBIT AND THE LABORATORY SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 NASA,LYNDON B JOHNSON SPACE CTR,HOUSTON,TX 77058. LOS ALAMOS NATL LAB,CLS2,LOS ALAMOS,NM 87545. 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 55 EP IEC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101811 ER PT J AU ANDERSON, KK HOBBS, JD LUO, L STANLEY, KD QUIRKE, JME SHELNUTT, JA AF ANDERSON, KK HOBBS, JD LUO, L STANLEY, KD QUIRKE, JME SHELNUTT, JA TI PLANAR-NONPLANAR CONFORMATIONAL EQUILIBRIUM OF OCTAETHYLPORPHYRIN AND MESO-NITRO-OCTAETHYLPORPHYRIN SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 SANDIA NATL LABS,DEPT FUEL SCI,ALBUQUERQUE,NM 87185. UNIV NEW MEXICO,DEPT CHEM,ALBUQUERQUE,NM 87131. FLORIDA INT UNIV,DEPT CHEM,MIAMI,FL 33199. 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 56 EP INOR PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101874 ER PT J AU BOTTO, RE HAYATSU, R CARRADO, KA WINANS, RE AF BOTTO, RE HAYATSU, R CARRADO, KA WINANS, RE TI ISOTOPE LABELING INVESTIGATIONS IN SIMULATED COALIFICATION - A VIEW OF GEOLOGICAL METAMORPHISM 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 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 56 EP GEOC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101688 ER PT J AU WINANS, RE MCBETH, RL MELNIKOV, PE AF WINANS, RE MCBETH, RL MELNIKOV, PE TI THE FATE OF OXYGEN FUNCTIONALITY DERIVED FROM LIGNIN DURING COALIFICATION 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 2 Z9 2 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 57 EP GEOC PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101689 ER PT J AU HENRY, EA BECKER, JA HUGHES, JR BRINKMAN, MJ WANG, TF STOYER, MA KUHNERT, A DIAMOND, RM STEPHENS, FS DELEPLANQUE, MA FALLON, P LEE, IY CEDERWALL, B CIZEWSKI, JA BERNSTEIN, LA AF HENRY, EA BECKER, JA HUGHES, JR BRINKMAN, MJ WANG, TF STOYER, MA KUHNERT, A DIAMOND, RM STEPHENS, FS DELEPLANQUE, MA FALLON, P LEE, IY CEDERWALL, B CIZEWSKI, JA BERNSTEIN, LA TI COLLECTIVE OBLATE BANDS IN PB NUCLEI SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LLNL,LIVERMORE,CA 94550. LBL,BERKELEY,CA 94720. RUTGERS UNIV,NEW BRUNSWICK,NJ 08855. RI Cederwall, Bo/M-3337-2014 OI Cederwall, Bo/0000-0003-1771-2656 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 58 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200057 ER PT J AU BRINKMAN, MJ BECKER, JA HENRY, EA HUGHES, JR STOYER, MA DIAMOND, RM STEPHENS, FS DELEPLANQUE, MA FALLON, P CEDARWALL, B LEE, IY CIZEWSKI, JA BERNSTEIN, LA AF BRINKMAN, MJ BECKER, JA HENRY, EA HUGHES, JR STOYER, MA DIAMOND, RM STEPHENS, FS DELEPLANQUE, MA FALLON, P CEDARWALL, B LEE, IY CIZEWSKI, JA BERNSTEIN, LA TI SHAPE-COEXISTENCE IN 194PB SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 RUTGERS UNIV,NEW BRUNSWICK,NJ 08855. RP BRINKMAN, MJ (reprint author), LBL,BERKELEY,CA 94720, 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 59 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200058 ER PT J AU CEDERWALL, B AF CEDERWALL, B TI NEW RESULTS FROM HIGH-SPIN EXPERIMENTS AT GAMMASPHERE SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,BERKELEY,CA 94720. RI Cederwall, Bo/M-3337-2014 OI Cederwall, Bo/0000-0003-1771-2656 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 60 EP NUCL PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200059 ER PT J AU SOMORJAI, GA MCINTYRE, B DUNPHY, J SALMERON, MB AF SOMORJAI, GA MCINTYRE, B DUNPHY, J SALMERON, MB TI SCANNING-TUNNELING-MICROSCOPY FOR CATALYST RESEARCH SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720. LAWRENCE BERKELEY LAB,DEPT CHEM,BERKELEY,CA 94720. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 16TH ST, NW, WASHINGTON, DC 20036 SN 0065-7727 J9 ABSTR PAP AM CHEM S JI Abstr. Pap. Am. Chem. Soc. PD AUG 22 PY 1993 VL 206 BP 61 EP PETR PN 2 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP322 UT WOS:A1993LP32200682 ER PT J AU WAHL, JH HOFSTADLER, SA GALE, DC BRUCE, JE SMITH, RD AF WAHL, JH HOFSTADLER, SA GALE, DC BRUCE, JE SMITH, RD TI PRACTICAL CONSIDERATIONS FOR ONLINE MICROSEPARATIONS USING FOURIER-TRANSFORM ION-CYCLOTRON RESONANCE 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 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 62 EP ANYL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32100398 ER PT J AU YIP, J PEARCE, KD CHRISTY, CE BARILL, BA MONTELEONE, S CHISHOLM, WP AF YIP, J PEARCE, KD CHRISTY, CE BARILL, BA MONTELEONE, S CHISHOLM, WP TI NEW PLASMA TORCH AND DATA-ANALYSIS SOFTWARE FOR AN ONLINE ICP SPECTROMETER FOR FOSSIL-FUEL PROCESS STREAMS SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY LA English DT Meeting Abstract C1 US DOE,MORGANTOWN ENERGY TECHNOL CTR,MORGANTOWN,WV 26507. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON 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 66 EP FUEL PN 1 PG 0 WC Chemistry, Multidisciplinary SC Chemistry GA LP321 UT WOS:A1993LP32101583 ER EF