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PT J
AU Davis, J
Modest, J
Larson, T
Smart, J
Brainard, JR
Sommerville, LE
AF Davis, J
Modest, J
Larson, T
Smart, J
Brainard, JR
Sommerville, LE
TI Reductive dissolution of alpha-geothite by Enterococcus faecalis.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 FT LEWIS COLL,DEPT CHEM,DURANGO,CO 81301.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 291
EP CHED
PN 1
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48201303
ER
PT J
AU Butcher, PJ
Clark, DL
Huffman, JC
VincentHollis, RL
Scott, BL
Watkin, JG
AF Butcher, PJ
Clark, DL
Huffman, JC
VincentHollis, RL
Scott, BL
Watkin, JG
TI Synthesis and reactivity of lanthanum aryloxide complexes containing
ETA-arene interactions
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 294
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203314
ER
PT J
AU Dadmun, MD
AF Dadmun, MD
TI Response of liquid crystalline polymers to an applied shear flow: Steady
state and relaxation behavior.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996.
OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 295
EP POLY
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA485
UT WOS:A1996UA48501522
ER
PT J
AU Warner, BP
Burns, CJ
AF Warner, BP
Burns, CJ
TI Redox couples of organouranium compounds
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 295
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203315
ER
PT J
AU Miller, RL
Scott, BL
Melo, MM
Abney, KD
Balaich, GJ
AF Miller, RL
Scott, BL
Melo, MM
Abney, KD
Balaich, GJ
TI New routes to C-substituted derivatives of cobalt dicarbollide.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,CST 11,LOS ALAMOS,NM 87545.
USAF ACAD,COLORADO SPRINGS,CO 80840.
RI Chamberlin, Rebecca/A-1335-2011
OI Chamberlin, Rebecca/0000-0001-6468-7778
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 296
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203316
ER
PT J
AU Pagoria, PF
Mitchell, AR
Schmidt, RD
AF Pagoria, PF
Mitchell, AR
Schmidt, RD
TI Vicarious amination of nitroarenes with trimethylhydrazinium iodide.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 296
EP ORGN
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA485
UT WOS:A1996UA48500651
ER
PT J
AU Rabinovich, D
Haswell, CM
Scott, BL
Miller, RL
Nielsen, JB
Abney, KD
AF Rabinovich, D
Haswell, CM
Scott, BL
Miller, RL
Nielsen, JB
Abney, KD
TI New dicarbollide complexes of uranium.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,CST 11,LOS ALAMOS,NM 87545.
RI Chamberlin, Rebecca/A-1335-2011
OI Chamberlin, Rebecca/0000-0001-6468-7778
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 297
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203317
ER
PT J
AU Dai, S
Toth, LM
AF Dai, S
Toth, LM
TI Structural stability and photochemistry of uranium(V) chloride and
oxychloride complexes in ambient temperature melts.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831.
RI Dai, Sheng/K-8411-2015
OI Dai, Sheng/0000-0002-8046-3931
NR 0
TC 0
Z9 0
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 300
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203320
ER
PT J
AU Britt, PF
Buchanan, AC
AF Britt, PF
Buchanan, AC
TI Impact of restricted mass transport on the free-radical decomposition of
phenethyl phenyl ether.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 335
EP ORGN
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA485
UT WOS:A1996UA48500690
ER
PT J
AU Assink, RA
Prabakar, S
AF Assink, RA
Prabakar, S
TI Hydrolysis, condensation and connectivity in inorganic-organic hybrid
sol-gel materials.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 ADV MAT LAB,ALBUQUERQUE,NM 87106.
SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 336
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203355
ER
PT J
AU Lukehart, CM
Milne, SB
Wittig, JE
Stock, SR
Carpenter, JP
Rek, ZU
AF Lukehart, CM
Milne, SB
Wittig, JE
Stock, SR
Carpenter, JP
Rek, ZU
TI Preparation of nanocomposites containing nanoclusters of transition
metals.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 VANDERBILT UNIV,DEPT CHEM,NASHVILLE,TN 37235.
VANDERBILT UNIV,DEPT APPL & ENGN SCI,NASHVILLE,TN 37235.
GEORGIA INST TECHNOL,SCH MAT SCI & ENGN,ATLANTA,GA 30332.
SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 377
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203394
ER
PT J
AU Ralle, M
Habenschuss, A
Wunderlich, B
AF Ralle, M
Habenschuss, A
Wunderlich, B
TI Crystal structure determination of tetraalkylammonium halides by X-ray
powder diffraction.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996.
OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 382
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203399
ER
PT J
AU Clark, JF
Rohal, KM
Clark, DL
Dixon, FM
Schroeder, NC
Strauss, SH
AF Clark, JF
Rohal, KM
Clark, DL
Dixon, FM
Schroeder, NC
Strauss, SH
TI Extraction and recovery of ReO4- and TcO4- using Fe(II)/Fe(III)
complexes.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 COLORADO STATE UNIV,DEPT CHEM,FT COLLINS,CO 80523.
LOS ALAMOS NATL LAB,NUCL & RADIOCHEM GRP CST11,LOS ALAMOS,NM 87544.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 389
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203406
ER
PT J
AU Balaich, GJ
Miller, RL
Abney, KD
AF Balaich, GJ
Miller, RL
Abney, KD
TI Synthesis of cobalt dicarbollide derivatives for addition and
condensation polymerization.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,NUCL & RADIOCHEM GRP,LOS ALAMOS,NM 87545.
USAF ACAD,DEPT CHEM,COLORADO SPRINGS,CO 80840.
RI Chamberlin, Rebecca/A-1335-2011
OI Chamberlin, Rebecca/0000-0001-6468-7778
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 390
EP INOR
PN 1
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203407
ER
PT J
AU Chase, RR
Rieke, PC
Guenther, D
Douglas, D
Anderson, D
AF Chase, RR
Rieke, PC
Guenther, D
Douglas, D
Anderson, D
TI Influence of ion beam etching parameters on resolution of biomimetically
deposited iron oxyhydroxide thin films.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 EASTERN OREGON STATE COLL, DEPT CHEM, LA GRANDE, OR 97850 USA.
PACIFIC NW LAB, RICHLAND, WA 99352 USA.
WASHINGTON STATE UNIV, PULLMAN, WA 99163 USA.
CASCADE HIGH SCH, LEAVENWORTH, WA 98826 USA.
TROUT LAKE HIGH SCH, TROUT LAKE, WA 98650 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 390
EP CHED
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48201402
ER
PT J
AU Mao, Y
Bakac, A
AF Mao, Y
Bakac, A
TI Photochemical oxidation of benzene and its methylated derivatives by
hydrogen peroxide
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 391
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203408
ER
PT J
AU Jacob, J
Espenson, JH
AF Jacob, J
Espenson, JH
TI Oxidation of methyl aromatics catalyzed by Methylrhenium trioxide
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 408
EP ORGN
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA485
UT WOS:A1996UA48500763
ER
PT J
AU Zhu, Z
Espenson, J
AF Zhu, Z
Espenson, J
TI Organic transformations catalyzed by methylrhenium trioxide (MTO)
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 409
EP ORGN
PN 2
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA485
UT WOS:A1996UA48500764
ER
PT J
AU Buchanan, AC
Britt, PF
Struss, JA
AF Buchanan, AC
Britt, PF
Struss, JA
TI Investigations of solid-state, acid-cracking reactions for lignin model
compounds
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 414
EP ORGN
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA485
UT WOS:A1996UA48500769
ER
PT J
AU Bisset, WC
Zincircioglu, O
Smith, PH
Gopalan, AS
AF Bisset, WC
Zincircioglu, O
Smith, PH
Gopalan, AS
TI Synthesis and comparison of metal, ion binding properties of some
polyhydroxamate chelators.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 428
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203445
ER
PT J
AU Zubkowski, JD
Washington, DA
Cannon, T
Valente, EJ
Parks, CD
Perry, DL
AF Zubkowski, JD
Washington, DA
Cannon, T
Valente, EJ
Parks, CD
Perry, DL
TI Copper(II) levulinates .1. Structure of [Cu(O2C(CH2)(2)COCH3)(4)](n) and
Cu-4(O2CCH2CH2COCH3)(6)(PPh(3))(4).
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 JACKSON STATE UNIV,DEPT CHEM,JACKSON,MS 39217.
MISSISSIPPI COLL,DEPT CHEM,CLINTON,MS 39058.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 435
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203452
ER
PT J
AU Loy, DA
Jamison, GM
Opperman, KA
Beach, JV
Waymouth, RM
AF Loy, DA
Jamison, GM
Opperman, KA
Beach, JV
Waymouth, RM
TI Oligosilane-siloxane nanocomposites.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305.
SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,ALBUQUERQUE,NM 87185.
RI Loy, Douglas/D-4847-2009
OI Loy, Douglas/0000-0001-7635-9958
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 450
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203467
ER
PT J
AU Loy, DA
Baugher, BM
AF Loy, DA
Baugher, BM
TI Comparison of bridged polysilsesquioxane xerogels prepared from
methoxy-, ethoxy- and propoxy-silyl monomers.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,ALBUQUERQUE,NM 87185.
RI Loy, Douglas/D-4847-2009
OI Loy, Douglas/0000-0001-7635-9958
NR 0
TC 0
Z9 0
U1 1
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 451
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203468
ER
PT J
AU Derzon, DK
Ulibarri, TA
AF Derzon, DK
Ulibarri, TA
TI Relative humidity and temperature effects in organic-inorganic
nanocomposites
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 460
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203477
ER
PT J
AU Wu, RL
Odom, JD
Dunlap, RB
Silks, LA
AF Wu, RL
Odom, JD
Dunlap, RB
Silks, LA
TI Synthesis and applications of chiral selone adducts.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,BIOCHEM & SPECT SECT,LOS ALAMOS,NM 87545.
UNIV S CAROLINA,DEPT CHEM & BIOCHEM,COLUMBIA,SC 29208.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 490
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203507
ER
PT J
AU Corbett, SM
Barbas, JT
AF Corbett, SM
Barbas, JT
TI The photolysis of trans-stilbene on silica surfaces.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 VALDOSTA STATE COLL,DEPT CHEM,VALDOSTA,GA 31698.
OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 493
EP CHED
PN 1
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48201507
ER
PT J
AU Kubas, GJ
Butts, MD
Lundmark, PJ
AF Kubas, GJ
Butts, MD
Lundmark, PJ
TI Metal SO2 and sulfide chemistry, syntheses of dinuclear Pd(0) and Pt(0)
mu-SO2 clusters, cationic Pt(II)-halocarbon complexes, and a dianionic
Cp(2)Ti(2)S(4) cluster.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 511
EP INOR
PN 1
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203528
ER
PT J
AU Ulibarri, TA
Loy, DA
Bates, SE
Black, EP
Jamison, GM
Myers, S
Assink, RA
Shea, KJ
AF Ulibarri, TA
Loy, DA
Bates, SE
Black, EP
Jamison, GM
Myers, S
Assink, RA
Shea, KJ
TI Bridged polysilsesquioxane-polydimethylsiloxane nanocomposites: A
reactivity study.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717.
RI Loy, Douglas/D-4847-2009
OI Loy, Douglas/0000-0001-7635-9958
NR 0
TC 0
Z9 0
U1 1
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 522
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203539
ER
PT J
AU AbuOmar, MM
Espenson, AH
AF AbuOmar, MM
Espenson, AH
TI Facile oxygen atom abstraction from inorganic ions by methylrhenium
dioxide.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 528
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203545
ER
PT J
AU Fryxell, GE
Rieke, PC
Stiff, CM
AF Fryxell, GE
Rieke, PC
Stiff, CM
TI Synthesis of self-assembled monolayers for biomimetic nucleation
studies.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA.
NW NAZARENE COLL, NAMPA, ID 83686 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 542
EP CHED
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48201556
ER
PT J
AU Walters, TM
Sram, JP
Easdon, JC
Smith, BF
AF Walters, TM
Sram, JP
Easdon, JC
Smith, BF
TI Synthesis of 4-acyl-5-thiopyrazolones.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 COLL OZARKS,DEPT CHEM,POINT LOOKOUT,MO 65726.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 543
EP CHED
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48201557
ER
PT J
AU Arterburn, JB
Hall, KA
Fogarty, IM
Goreham, DM
Bryan, JC
Ott, KC
AF Arterburn, JB
Hall, KA
Fogarty, IM
Goreham, DM
Bryan, JC
Ott, KC
TI Synthesis and characterization of functionalized rhenium imido
complexes.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544.
OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 548
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203565
ER
PT J
AU Wu, RL
Unkefer, CJ
Silks, LA
AF Wu, RL
Unkefer, CJ
Silks, LA
TI Synthesis of D-[U-C-13]glucal, D-[U-C-13]galactal, and L-[U-C-13]fucose
for NMR structure studies of oligosaccharides.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,BIOCHEM & SPECT SECT,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 576
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203593
ER
PT J
AU Birnbaum, ER
LeLacheur, RM
Tumas, W
AF Birnbaum, ER
LeLacheur, RM
Tumas, W
TI Selective catalytic oxidation in supercritical carbon dioxide: Air
oxidation of cyclohexene by halogenated iron porphyrin catalysts.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 592
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203609
ER
PT J
AU Cook, GK
Andrews, MA
AF Cook, GK
Andrews, MA
TI Catalytic di-dehydroxylation of diols and carbohydrates to alkenes by
(pentamethylcyclopentadienyl)trioxorhenium(VII)
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 600
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203617
ER
PT J
AU Ulibarri, TA
Bates, SE
Black, EP
Schaefer, DW
Beaucage, G
Lee, MK
Moore, PA
Burns, GT
AF Ulibarri, TA
Bates, SE
Black, EP
Schaefer, DW
Beaucage, G
Lee, MK
Moore, PA
Burns, GT
TI The effect of solvent compatibilization in nanocomposite materials.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 UNIV CINCINNATI,CINCINNATI,OH 45221.
SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
DOW CORNING CORP,MIDLAND,MI 48686.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 606
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203623
ER
PT J
AU Small, JH
Tran, J
Shea, KJ
Loy, DA
Carpenter, JP
AF Small, JH
Tran, J
Shea, KJ
Loy, DA
Carpenter, JP
TI Synthesis and characterization of amine-containing hybrid
organic-inorganic bridged polysilsesquioxane and siloxane stargels.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717.
RI Loy, Douglas/D-4847-2009
OI Loy, Douglas/0000-0001-7635-9958
NR 0
TC 0
Z9 0
U1 1
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 609
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203626
ER
PT J
AU McClain, MD
Jamison, GM
Loy, DA
AF McClain, MD
Jamison, GM
Loy, DA
TI Thermal oligomerization of phenyl phosphaacetylene
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,ALBUQUERQUE,NM 87185.
RI Loy, Douglas/D-4847-2009
OI Loy, Douglas/0000-0001-7635-9958
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 621
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203638
ER
PT J
AU Kennedy, JR
AF Kennedy, JR
TI Disproportionation and phase separation in intercalated binary metal
halides.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 IDAHO NATL ENGN LAB,RES CTR,IDAHO FALLS,ID 83415.
MONTANA STATE UNIV,DEPT CHEM,BOZEMAN,MT 59717.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 632
EP INOR
PN 1
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203649
ER
PT J
AU Kennedy, JR
AF Kennedy, JR
TI Towards high temperature chemical sensors. Inclusion chemistry of
certain Ta/P/S phases.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415.
MONTANA STATE UNIV,DEPT CHEM,BOZEMAN,MT 59717.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 633
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203650
ER
PT J
AU Yuchs, SE
Wasserman, SR
AF Yuchs, SE
Wasserman, SR
TI The effect of surface modification on the ion-exchange properties of
layered aluminosilicates.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 638
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203655
ER
PT J
AU Whinnery, LRL
Coutts, DK
Even, BR
Beach, JV
Loy, DA
AF Whinnery, LRL
Coutts, DK
Even, BR
Beach, JV
Loy, DA
TI Engineering macrostructure in ceramics.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 SANDIA NATL LABS,MAT SYNTH DEPT,LIVERMORE,CA 94551.
PROP ORGAN MAT DEPT,ALBUQUERQUE,NM 87185.
RI Loy, Douglas/D-4847-2009
OI Loy, Douglas/0000-0001-7635-9958
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 663
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203680
ER
PT J
AU Kennedy, JR
AF Kennedy, JR
TI Structural studies on the inclusion chemistry of the solvato-chromic
Pt(CNR)(4)Pd(CN)(4) double salt complexes.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415.
MONTANA STATE UNIV,DEPT CHEM,BOZEMAN,MT 59717.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP 679
EP INOR
PN 1
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA482
UT WOS:A1996UA48203696
ER
PT J
AU Thompson, MA
AF Thompson, MA
TI QM/MMpol: A consistent model for microscopic solvation. Solvent induced
blue shirt of the n->pi* excited state of formaldehyde.
SO ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Meeting Abstract
C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0065-7727
J9 ABSTR PAP AM CHEM S
JI Abstr. Pap. Am. Chem. Soc.
PD MAR 24
PY 1996
VL 211
BP A238
EP PHYS
PN 2
PG 1
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA485
UT WOS:A1996UA48501172
ER
PT J
AU Heller, J
Larsen, R
Ernst, M
Kolbert, AC
Baldwin, M
Prusiner, SB
Wemmer, DE
Pines, A
AF Heller, J
Larsen, R
Ernst, M
Kolbert, AC
Baldwin, M
Prusiner, SB
Wemmer, DE
Pines, A
TI Application of rotational resonance to inhomogeneously broadened systems
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID POLYCRYSTALLINE SOLIDS; NMR
AB A protocol is presented for the determination of internuclear distances using rotational-resonance magnetization-exchange NMR in systems with inhomogeneously broadened lines. Non-linear least-square fitting procedures are used to obtain the distance, the inhomogeneous broadening, the zero-quantum relaxation time, and error estimates for these parameters. We apply this procedure to a biological system of unknown structure.
C1 UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,STRUCT BIOL DIV,BERKELEY,CA 94720.
UNIV CALIF SAN FRANCISCO,DEPT NEUROL,SAN FRANCISCO,CA 94143.
RP Heller, J (reprint author), UNIV CALIF BERKELEY,GRAD GRP BIOPHYS,BERKELEY,CA 94720, USA.
RI Ernst, Matthias/A-6732-2010; larsen, russell/H-3443-2013
OI Ernst, Matthias/0000-0002-9538-6086;
NR 28
TC 17
Z9 17
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD MAR 22
PY 1996
VL 251
IS 3-4
BP 223
EP 229
DI 10.1016/0009-2614(96)00098-X
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UD924
UT WOS:A1996UD92400015
ER
PT J
AU MarzalCasacuberta, A
BlancoVaca, F
Ishida, BY
JulveGil, J
Shen, JH
CalvetMarquez, S
GonzalezSastre, F
Chan, L
AF MarzalCasacuberta, A
BlancoVaca, F
Ishida, BY
JulveGil, J
Shen, JH
CalvetMarquez, S
GonzalezSastre, F
Chan, L
TI Functional lecithin:cholesterol acyltransferase deficiency and high
density lipoprotein deficiency in transgenic mice overexpressing human
apolipoprotein A-II
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID HUMAN-PLASMA-LIPOPROTEINS; FISH EYE SYNDROME; HEPATIC LIPASE;
ESTERIFICATION RATE; SERUM-LIPOPROTEINS; TANGIER DISEASE; GENE; HDL;
EXPRESSION; TRANSPORT
AB The concentration of high density lipoproteins (HDL) is inversely related to the risk of atherosclerosis, The two major protein components of HDL are apolipoprotein (apo) A-I and apoA-II. To study the role of apoA-II in lipoprotein metabolism and atherosclerosis, we have developed three lines of C57BL/6 transgenic mice expressing human apoA-II (lines 25.3, 21.5, and 11.1). Northern blot experiments showed that human apoA-II mRNA was present only in the liver of transgenic mice, SDS-polyacrylamide gel electrophoresis and Western blot analysis demonstrated a 17.4-kDa human apoA-II in the HDL fraction of the plasma of transgenic mice, After 3 months on a regular chow, the plasma concentrations of human apoA-II were 21 +/- 4 mg/dl in the 25.3 line, 51 +/- 6 mg/dl in the 21.5 line, and 74 +/- 4 mg/dl in the 11.1 line. The concentration of cholesterol in plasma was significantly lower in transgenic mice than in control mice because of a decrease in HDL cholesterol that was greatest in the Line that expressed the most apoA-II (23 mg/dl in the 11.1 line versus 63 mg/dl in control mice). There was also a reduction in the plasma concentration of mouse apoA-I (32 +/- 2, 56 +/- 9, 91 +/- 7, and 111 +/- 2 mg/dl for lines 11.1, 21.5, 25.3, and control mice, respectively) that was inversely correlated with the amount of human apoA-II expressed, Additional changes in plasma lipid/lipoprotein profile noted in line 11.1 that expressed the highest level of human apoA-II include elevated triglyceride, increased proportion of total plasma, and RDL free cholesterol and a marked (>10-fold) reduction in mouse apoA-II. Total endogenous plasma lecithin:cholesterol acyltransferase (LCAT) activity was reduced to a level directly correlated with the degree of increased plasma human apoA-II in the transgenic lines, LCAT activity toward erogenous substrate was, however, only slightly decreased, The biochemical changes in the 11.1 line, which is markedly deficient in plasma apoA-I, an activator for LCAT, are reminiscent of those in patients with partial LCAT deficiency, Feeding the transgenic mice a high fat, high cholesterol diet maintained the mouse apoA-I concentration at a normal level (69 +/- 14 mg/dl in line 11.1 compared with 71 +/- 6 mg/dl in non-transgenic controls) and prevented the appearance of HDL deficiency, All this happened in the presence of a persistently high plasma human apoA-II (96 +/- 14 mg/dl), Paradoxical HDL elevation by high fat diets has been observed in humans and is reproduced in human apoA-II overexpressing transgenic mice but not in control mice. Finally, HDL size and morphology varied substantially in the three transgenic lines, indicating the importance of apoA-II concentration in the modulation of HDL formation, The LCAT and HDL deficiencies observed in this study indicate that apoA-II plays a dynamic role in the regulation of plasma HDL metabolism.
C1 BAYLOR COLL MED,DEPT CELL BIOL,HOUSTON,TX 77030.
BAYLOR COLL MED,DEPT MED,HOUSTON,TX 77030.
UNIV AUTONOMA BARCELONA,DEPT BIOQUIM & BIOL MOLEC,E-08025 BARCELONA,SPAIN.
HOSP SANTA CRUZ & SAN PABLO,INST RECERA,E-08025 BARCELONA,SPAIN.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV RES MED & RADIAT BIOPHYS,BERKELEY,CA 94720.
UNIV AUTONOMA BARCELONA,UNITAT ANAT & EMBRIOL,E-08193 BARCELONA,SPAIN.
HOSP SANTA CRUZ & SAN PABLO,SERV BIOQUIM,E-08025 BARCELONA,SPAIN.
OI Julve, Josep/0000-0002-6531-2246
FU NHLBI NIH HHS [HL47443, HL16512]
NR 70
TC 55
Z9 55
U1 0
U2 1
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD MAR 22
PY 1996
VL 271
IS 12
BP 6720
EP 6728
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA UB157
UT WOS:A1996UB15700027
PM 8636092
ER
PT J
AU Kobayashi, K
Oka, K
Forte, T
Ishida, B
Teng, BB
IshimuraOka, K
Nakamuta, M
Chan, L
AF Kobayashi, K
Oka, K
Forte, T
Ishida, B
Teng, BB
IshimuraOka, K
Nakamuta, M
Chan, L
TI Reversal of hypercholesterolemia in low density lipoprotein receptor
knockout mice by adenovirus-mediated gene transfer of the very low
density lipoprotein receptor
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID LDL-RECEPTOR; PROTEIN; RNA; METABOLISM; CLEARANCE; TYPE-5
AB We have used the technique of adenovirus-mediated gene transfer to study the in vivo function of the very low density lipoprotein receptor (VLDLR) in low density lipoprotein receptor (VLDLR) knockout mice. We generated a replication-defective adenovirus (AdmVLDLR) containing mouse VLDLR cDNA driven by a cytomegalovirus promoter, Transduction of cultured Hepa (mouse hepatoma) cells and LDLR-deficient CHO-IdIA7 cells in vitro by the virus led to high-level expression of immunoreactive VLDLR proteins with molecular sizes of 143 kDa and 161 kDa, Digestion of the cell extract with the enzymes neuraminidase, N-glycanase, and O-glycanase resulted in the stepwise lowering of the apparent size of the 161-kDa species toward the 143-kDa species. LDLR (-/-) mice fed a 0.2% cholesterol diet were treated with a single intravenous injection of 3 x 10(9) plaque-forming units of AdmVLDLR, Control LDLR (-/-) mice received either phosphate-buffered saline or AdLacZ, a similar adenovirus containing the LacZ cDNA instead of mVLDLR cDNA. Comparison of the plasma lipids in the 3 groups of mice indicates that in the AdmVLDL animals, total cholesterol is reduced by similar to 50% at days 4 and 9 and returned toward control values on day 21. in these animals, there was also a similar to 30% reduction in plasma apolipoprotein (apo) E accompanied by a 90% fall in apoB-100 on day 4 of treatment, By FPLC analysis, the major reduction in plasma cholesterol in the AdmVLDL animals was accounted for by a marked reduction in the intermediate density lipoprotein/low density lipoprotein (IDL/LDL) fraction. Plasma VLDL, IDL/LDL, and HDL were isolated from the three groups of animals by ultracentrifugal flotation, In the AdmVLDLR animals, there was substantial loss (similar to 65%) of protein and cholesterol mainly in the IDL/LDL fraction on days 4 and 9, Nondenaturing gradient gel electrophoresis indicates a preferential loss of the IDL peak although the LDL peak was also reduced, When I-125-IDL was administered intravenously into animals on day 4, the AdmVLDLR animals cleared the I-125-IDL at a rate 5-10 times higher than the AdLacZ animals.
We conclude that adenovirus-mediated transfer of the
C1 BAYLOR COLL MED,DEPT CELL BIOL,HOUSTON,TX 77030.
BAYLOR COLL MED,DEPT MED,HOUSTON,TX 77030.
USDA ARS,CHILDRENS NUTR RES CTR,HOUSTON,TX 77030.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV LIFE SCI,BERKELEY,CA 94720.
BAYLOR COLL MED,DEPT PEDIAT,HOUSTON,TX 77030.
FU NHLBI NIH HHS [HL-16512, HL-18574]
NR 34
TC 93
Z9 94
U1 0
U2 1
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD MAR 22
PY 1996
VL 271
IS 12
BP 6852
EP 6860
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA UB157
UT WOS:A1996UB15700045
PM 8636110
ER
PT J
AU Chen, A
Corrales, LR
AF Chen, A
Corrales, LR
TI Semiempirical methodology for simulating covalently bonded materials:
Application to silicon
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID MOLECULAR-DYNAMICS SIMULATIONS; AMORPHOUS-SILICON; POTENTIALS; LIQUID;
MODEL; SI
AB A recently introduced semiempirical methodology is used to model and simulate silicon via molecular dynamics. This approach is capable of grasping essential qualitative and quantitative features of the coupling between the electronic coordinates and the geometric structure. Properties of the bulk diamond crystal, the melt and amorphous solid states are obtained using optimization techniques and molecular dynamics simulations. The pair distribution function of the amorphous state is in excellent agreement with experimental and other molecular dynamics simulation results. (C) 1996 American Institute of Physics.
RP Chen, A (reprint author), PACIFIC NW NATL LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA.
NR 34
TC 4
Z9 4
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 22
PY 1996
VL 104
IS 12
BP 4632
EP 4641
DI 10.1063/1.471157
PG 10
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UA381
UT WOS:A1996UA38100029
ER
PT J
AU Sadus, RJ
Prausnitz, JM
AF Sadus, RJ
Prausnitz, JM
TI Three-body interactions in fluids from molecular simulation:
Vapor-liquid phase coexistence of argon
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID GIBBS ENSEMBLE
AB Gibbs-ensemble molecular simulations are reported for the vapor-liquid phase coexistence of argon using the two-body Lennard-Jones potential. During the simulation, the possible effect of three-body interactions on the pressure and configurational energy of the vapor and liquid phases is estimated by performing calculations with three-body potentials. The intermolecular potentials used for the three-body calculations incorporate the influence of both three-body-dispersion and three-body-repulsion interactions. The results show that three-body repulsion makes a significant contribution to three-body interactions in the liquid phase. The effect of three-body dispersion is offset substantially by three-body repulsion. (C) 1996 American Institute of Physics.
C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720.
RP Sadus, RJ (reprint author), SWINBURNE UNIV TECHNOL,SCH COMP SCI & SOFTWARE ENGN,COMP SIMULAT & PHYS APPLICAT GRP,POB 218,HAWTHORN,VIC 3122,AUSTRALIA.
NR 16
TC 30
Z9 30
U1 0
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 22
PY 1996
VL 104
IS 12
BP 4784
EP 4787
DI 10.1063/1.471172
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UA381
UT WOS:A1996UA38100044
ER
PT J
AU Martin, JE
Anderson, RA
AF Martin, JE
Anderson, RA
TI Chain model of electrorheology
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID FLUIDS; RHEOLOGY
AB We develop a chain model of an electrorheological fluid in steady and oscillatory shear. This model is based on a balance of hydrodynamic and electrostatic forces and focuses on the mechanical stability of chains. With this model we compute the shape and orientation of an unconfined dipolar chain in steady shear as a function of the shear rate and electric field, and show that this leads to the expected shear-thinning viscosity. We then demonstrate that chains confined by electrodes are unstable in some Mason number regimes. The chain model is extended to the case of oscillatory shear by including a kinetic equation for the aggregation and fragmentation of chains. The resultant chain dynamics is found to be strongly nonlinear, as is the theology. Finally, we consider the effect of local field corrections and long range interactions on the bare dipolar interaction force and derive a self-consistent pair interaction force that demonstrates that the maximum orientation of a chain in shear depends strongly on the dielectric contrast. (C) 1996 American Institute of Physics.
RP Martin, JE (reprint author), SANDIA NATL LABS,RES & EXPLORATORY TECHNOL DIV,ALBUQUERQUE,NM 87185, USA.
NR 14
TC 138
Z9 138
U1 0
U2 22
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 22
PY 1996
VL 104
IS 12
BP 4814
EP 4827
DI 10.1063/1.471176
PG 14
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UA381
UT WOS:A1996UA38100048
ER
PT J
AU Hamiche, A
Schultz, P
Ramakrishnan, V
Oudet, P
Prunell, A
AF Hamiche, A
Schultz, P
Ramakrishnan, V
Oudet, P
Prunell, A
TI Linker histone-dependent DNA structure in linear mononucleosomes
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE nucleosome position; nucleosome fractionation; DNA wrapping; electron
microscopy; chromatin superstructure
ID HIGHER-ORDER STRUCTURE; NUCLEOSOME CORE PARTICLE; CHROMATIN
RECONSTITUTION; GLOBULAR DOMAIN; MODEL; RINGS; H-5; MOLECULES;
ELECTROPHORESIS; SUPERSTRUCTURE
AB We have examined the binding of the linker histone H5 (LH) to mononucleosomes. Mononucleosomes reconstituted on short DNA fragments display a series of discrete bands on a gel corresponding to various nucleosome positions along the DNA. When a series of engineered H5s with differing extents of the C-terminal tail are bound to these mononucleosomes, the electrophoretic mobilities of the resulting complexes are altered. Not only is there a general increase in mobility upon complex formation, but there is a reduction in the differences in mobility of the most distal nucleosomes. The complexes were also visualized by electron microscopy. From these two complementary studies, we conclude the following. (1) Entering and exiting DNAs are uncrossed in the LH-free particles, despite a DNA wrapping of 1.65 to 1.7 turns around the histone core. This results from a bending of the entering and exiting DNA away from each other and the histone surface, presumably as a consequence of electrostatic repulsion. This confirms and extends conclusions derived from our recent examination of the same particles in 3D through cryo-electron microscopy. (2) Binding of the globular domain of H5 increases DNA wrapping to 1.8 to 1.9 turns, but fails to induce a crossing due to an accentuation of the bends. (3) The C-terminal tail of H5 bridges entering and exiting DNAs together into a four-stranded stem over a distance of about 30 bp. The occurrence of such a stem may introduce constraints on models of the 30 nm chromatin fiber. (C) 1996 Academic Press Limited
C1 INST JACQUES MONOD,CNRS,F-75251 PARIS 05,FRANCE.
UNIV PARIS 07,F-75251 PARIS 05,FRANCE.
CNRS U184 INSERM,LGME,INST GENET & BIOL MOLEC & CELLULAIRE,F-67404 ILLKIRCH GRAFFENS,FRANCE.
UNIV STRASBOURG 1,F-67404 ILLKIRCH GRAFFENS,FRANCE.
BNL,DEPT BIOL,UPTON,NY 11973.
OI Ramakrishnan, V/0000-0002-4699-2194
FU NIGMS NIH HHS [GM42796]
NR 43
TC 142
Z9 142
U1 0
U2 5
PU ACADEMIC PRESS LTD
PI LONDON
PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX
SN 0022-2836
J9 J MOL BIOL
JI J. Mol. Biol.
PD MAR 22
PY 1996
VL 257
IS 1
BP 30
EP 42
DI 10.1006/jmbi.1996.0144
PG 13
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA TZ980
UT WOS:A1996TZ98000004
PM 8632457
ER
PT J
AU Cheng, XH
Gao, QY
Smith, RD
Simanek, EE
Mammen, M
Whitesides, GM
AF Cheng, XH
Gao, QY
Smith, RD
Simanek, EE
Mammen, M
Whitesides, GM
TI Characterization of hydrogen-bonded aggregates in chloroform by
electrospray ionization mass spectrometry
SO JOURNAL OF ORGANIC CHEMISTRY
LA English
DT Article
ID COMPLEX
C1 PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA.
PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA.
HARVARD UNIV, DEPT CHEM, CAMBRIDGE, MA 02138 USA.
RI Smith, Richard/J-3664-2012
OI Smith, Richard/0000-0002-2381-2349
NR 14
TC 61
Z9 63
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3263
J9 J ORG CHEM
JI J. Org. Chem.
PD MAR 22
PY 1996
VL 61
IS 6
BP 2204
EP 2206
DI 10.1021/jo951345g
PG 3
WC Chemistry, Organic
SC Chemistry
GA UB205
UT WOS:A1996UB20500055
ER
PT J
AU Cheng, XH
Gao, QY
Smith, RD
Jung, KE
Switzer, C
AF Cheng, XH
Gao, QY
Smith, RD
Jung, KE
Switzer, C
TI Comparison of 3',5'- and 2',5'-linked DNA duplex stabilities by
electrospray ionization mass spectrometry
SO CHEMICAL COMMUNICATIONS
LA English
DT Article
ID HEXOSE-NUCLEIC-ACIDS; OLIGONUCLEOTIDE DUPLEX; ASSOCIATION; LINKAGES
AB Two mutually complementary strands of 2',5'-linked DNA form. a unique noncovalent complex observed by electrospray ionization mass spectrometry; by the latter method, the double-stranded state of a 2',5'-linked DNA duplex is less stable than the natural DNA duplex of identical base composition.
C1 UNIV CALIF RIVERSIDE, DEPT CHEM, RIVERSIDE, CA 92521 USA.
PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA.
PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA.
RI Smith, Richard/J-3664-2012
OI Smith, Richard/0000-0002-2381-2349
NR 22
TC 13
Z9 13
U1 0
U2 4
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK MILTON ROAD, CAMBRIDGE, CAMBS, ENGLAND
CB4 4WF
SN 1359-7345
J9 CHEM COMMUN
JI Chem. Commun.
PD MAR 21
PY 1996
IS 6
BP 747
EP 748
DI 10.1039/cc9960000747
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UG041
UT WOS:A1996UG04100027
ER
PT J
AU Johnston, HS
Davis, HF
Lee, YT
AF Johnston, HS
Davis, HF
Lee, YT
TI NO3 photolysis product channels: Quantum yields from observed energy
thresholds
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID LASER-INDUCED FLUORESCENCE
AB The absorption of visible light by NO3 leads to three products: NO + O-2, NO2 + O, and fluorescence. We report a new method for obtaining quantum yields for the NO3 molecule, using measured energy thresholds separating NO3 and its product channels. The assumptions of this model are the following: (i) NO3 internal energy (photon plus vibrations plus rotations) gives the necessary and sufficient condition to select each of the three product channels, as justified by the observed large differences in reaction times for the three products. (ii) The unresolved complexities of ground-state NO3 spectra and quantum states are approximated by standard separable re-vibrational expressions for statistical mechanical probability functions. These results may be of interest to both physical chemists and atmospheric chemists. The NO3(*) vibronic precursors of the three product channels are identified. We evaluate and plot vibrational state-specific absolute quantum yields as a function of wavelength Phi(vib)(lambda) for each product channel. We sum over vibrational states to give the macroscopic quantum yield as a function of wavelength Phi(lambda), obtained here from 401 to 690 nm and at 190, 230, and 298 K. By adding considerations of light absorption cross sections sigma(lambda) at 230 and 298 K and a stratospheric radiation distribution I(lambda) from 401 to 690 nm, we evaluate the wavelength dependent photochemical rate coefficients j(lambda) for each of the three product channels, and we find the integrated photolysis constants, j(NO), j(NO2), and j(fluorescence). At 298 K, our Phi(lambda) for NO2 + O products agree with the major features observed by Orlando et al. (1993), but show significant systematic offset in the 605-620 nm wavelength range. Our Phi(lambda) for NO + O-2 products at 298 K agree with those observed by Magnotta et al. (1980) within their experimental scatter. Experimental error in our method for measuring quantum yields arises only from errors in measuring the wavelengths at which various product yields approach zero; there is no dependence and, thus, no error arising from light absorption cross sections, light intensities, or species concentrations, which contribute errors to the method of laser photolysis and resonance fluorescence. The results reported here are unique in including quantum yields at 190 and 230 K, which may be useful for modeling atmospheric photochemistry.
C1 LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720.
RP Johnston, HS (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA.
RI Lee, Yuan-Tseh/F-7914-2012
NR 19
TC 49
Z9 49
U1 4
U2 15
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 21
PY 1996
VL 100
IS 12
BP 4713
EP 4723
DI 10.1021/jp952692x
PG 11
WC Chemistry, Physical
SC Chemistry
GA UB162
UT WOS:A1996UB16200006
ER
PT J
AU Glendening, ED
Feller, D
AF Glendening, ED
Feller, D
TI Dication-water interactions: M(2+)(H2O)(n) clusters for alkaline earth
metals M=Mg,Ca,Sr,Ba, and Ra
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID MOLECULAR CALCULATIONS; WAVE-FUNCTIONS; BASIS-SETS; HYDROGEN;
POTENTIALS; COMPLEXES; ORBITALS; CATIONS; BOND; H2O
AB Gas-phase structures, binding energies, and enthalpies are reported for small M(2+)(H2O)(n) clusters consisting of an alkaline earth dication (Mg2+, Ca2+, Sr2+, Ba2+, and Ra2+) with one to six water molecules. Ab initio molecular orbital calculations were performed at the RHF and MP2 levels of theory using split-valence basis sets (6-31+G* with effective core potentials for the heavier alkaline earth metals). The water molecules in these clusters coordinate the dications in highly symmetric arrangements that tend to enhance electrostatic charge-dipole interactions while minimizing ligand-ligand repulsions. Comparisons of the calculated structures and binding energies to higher level treatments reveal fairly reasonable agreement. The optimized M-O distances are slightly long (by 0.02-0.03 Angstrom), and binding energies are somewhat weak (by 1-3 kcal mol(-1) per ligand). Natural energy decomposition analysis emphasizes the importance of polarization effects in the M(2+)(H2O)(n) clusters. Polarization is largely responsible for the nonclassical bent and pyramidal structures of the di- and trihydrates and for the nonadditive, many-body tens that contribute importantly to the binding energies. This study serves, in part, to calibrate the RHF/6-31+G* and MP2/6-31+G* approaches for applications to dication-ligand interactions in more extended systems (such as the ion-selective binding of crown ethers) for which calculations at higher levels of theory are not currently feasible.
C1 PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352.
INDIANA STATE UNIV,DEPT CHEM,TERRE HAUTE,IN 47809.
NR 32
TC 126
Z9 127
U1 0
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 21
PY 1996
VL 100
IS 12
BP 4790
EP 4797
DI 10.1021/jp952546r
PG 8
WC Chemistry, Physical
SC Chemistry
GA UB162
UT WOS:A1996UB16200018
ER
PT J
AU Feilchenfeld, H
Chumanov, G
Cotton, TM
AF Feilchenfeld, H
Chumanov, G
Cotton, TM
TI Photoreduction of methylviologen adsorbed on silver
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID ELECTRONICALLY EXCITED PHOTODISSOCIATION; ENHANCED RAMAN-SCATTERING;
ROUGH METAL-SURFACES; DISTANCE DEPENDENCE; PHOTOCHEMISTRY; MOLECULES;
CH3BR; PHOTOEMISSION; PHOTOFRAGMENTATION; PHOTODESORPTION
AB Methylviologen adsorbed on a roughened silver electrode is reduced to its cation radical upon irradiation with laser light at liquid nitrogen temperature. Surface-enhanced Raman scattering (SERS) spectra were obtained with different excitation wavelengths between 406 and 752 nm and compared to those obtained at room temperature in an electrochemical cell under potential control. From two-color experiments, in which one laser frequency was used to generate the radical and a second to excite the SERS spectra, it was determined that radical formation occurs mainly with excitation in the blue spectral region. A comparison of the SERS spectra of the dication and cation radical forms of methylviologen with their solution spectra suggests that the former interacts more strongly with the surface than the latter. The cation radical appears to be stable for several hours in liquid nitrogen but has a short lifetime at room temperature. Two mechanisms for the photoreduction are discussed: plasmon-assisted electron transfer from the metal to the methylviologen dication and formation of a resonance charge transfer complex. The current experimental data are insufficient to determine the particular role of these mechanisms.
C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011.
HEBREW UNIV JERUSALEM,DEPT ORGAN CHEM,IL-91904 JERUSALEM,ISRAEL.
NR 35
TC 43
Z9 43
U1 1
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 21
PY 1996
VL 100
IS 12
BP 4937
EP 4943
DI 10.1021/jp952329q
PG 7
WC Chemistry, Physical
SC Chemistry
GA UB162
UT WOS:A1996UB16200038
ER
PT J
AU Brown, DE
George, SM
Huang, C
Wong, EKL
Rider, KB
Smith, RS
Kay, BD
AF Brown, DE
George, SM
Huang, C
Wong, EKL
Rider, KB
Smith, RS
Kay, BD
TI H2O condensation coefficient and refractive index for vapor-deposited
ice from molecular beam and optical interference measurements
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID SURFACES; WATER; ADSORPTION; DESORPTION; KINETICS; NITROGEN; RU(001);
GASES
AB The condensation of H2O on ice multilayers on Ru(001) was studied using both molecular beam and optical interference techniques as a function of surface temperature. From the beam reflection technique, the H2O sticking coefficient, S, was determined to be S = 0.99 +/- 0.03 at temperatures between 85 and 150 K and was independent of incident angle (0-70 degrees) and beam energy (1-40 kcal/mol). Thf condensation coefficient, alpha, was dependent on both the incident H2O flux and the desorption H2O flux at the various surface temperatures. The magnitude of alpha varied continuously from unity at T < 130 K to zero at higher temperatures. The optical interference experiments yielded condensation coefficients and sticking coefficients of alpha = S = 0.97 +/- 0.10 at temperatures from 97 to 145 K where the H2O desorption flux was negligible with respect to the incident flux. The optical interference measurements monitored the ice film thickness versus H2O exposure time and were dependent on the refractive index, n, and the density, rho, of the vapor-deposited ice. Consequently, the combined molecular beam and optical interference measurements provided a means to evaluate the refractive index and density for vapor-deposited ice as a function of surface temperature. The values of the refractive index varied from n = 1.27 at 90 K to n = 1.31 at 130 K. The calculated densities varied from rho = 0.82 g/cm(3) at 90 K to rho = 0.93 g/cm(3) at 130 K. Previous optical interference data were also reanalyzed to yield refractive indices and ice densities for films grown at surface temperatures between 20 and 150 K. Both the refractive index and density increased monotonically with increasing growth temperature. The lower refractive index and density at lower temperatures indicate that microporous ice films are formed when H2O deposits on substrates at T < 120 K.
C1 UNIV COLORADO,DEPT CHEM & BIOCHEM,BOULDER,CO 80309.
PACIFIC NW NATL LAB,ENVIRONM MOL SCI LAB,RICHLAND,WA 99352.
RI George, Steven/O-2163-2013; Smith, Scott/G-2310-2015
OI George, Steven/0000-0003-0253-9184; Smith, Scott/0000-0002-7145-1963
NR 53
TC 184
Z9 184
U1 0
U2 26
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 21
PY 1996
VL 100
IS 12
BP 4988
EP 4995
DI 10.1021/jp952547j
PG 8
WC Chemistry, Physical
SC Chemistry
GA UB162
UT WOS:A1996UB16200044
ER
PT J
AU Pandya, KI
Heald, SM
Hriljac, JA
Petrakis, L
Fraissard, J
AF Pandya, KI
Heald, SM
Hriljac, JA
Petrakis, L
Fraissard, J
TI Characterization by EXAFS, NMR, and other techniques of Pt/NaY zeolite
at industrially relevant low concentration of platinum
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID FINE-STRUCTURE SPECTROSCOPY; ELECTRONIC-STRUCTURE; METAL-CATALYSTS;
Y-ZEOLITE; PARTICLES; CLUSTERS; SIZE; HYDROGEN
AB In-situ extended X-ray absorption fine structure (EXAFS), H-1 and Xe nuclear magnetic resonance (NMR), H-2 chemisorption, X-ray powder diffraction (XPD), and high-resolution electron microscopy (HREM) techniques were used to understand, as precisely as possible, carefully prepared Pt/Y zeolite samples at industrially relevant low levels of Pt loadings. These techniques were used to determine the local structure, size, and location of the metal particles for a series of 0.8 wt % Pt/NaY zeolite catalysts which have been reduced at 300, 500, and 650 degrees C. The EXAFS and NMR results show that the metal particles are smallest, as expected, for the sample reduced at 300 degrees C, with an average size of 11.3 Angstrom and containing 30 atoms, assuming a spherical shape. These particles are located primarily inside the supercages. For the samples reduced at 500 and 650 degrees C, the size and location of the Pt particles are distinctly different from those for the 300 degrees C sample; i.e., the particles are larger and increasingly located outside the supercages. The sizes of the Pt particles obtained from the first shell analysis for the samples reduced at 500 and 650 degrees C are 23 and 45 Angstrom, respectively. The Pt particles for the sample reduced at 650 Angstrom C are completely outside the zeolite crystallite, while for the 500 degrees C sample 23% of the particles are outside. The XPD results show that the full-width-half-maximum (fwhm) of the zeolite X-ray diffraction peaks decreases as the reduction temperature increases, indicating enhanced crystallinity of the framework and repair of the possible damage from the agglomeration and movement of the Pt particles, Comparison of EXAFS results of samples prepared with different techniques shows that the average metal particle size is 10 +/- 2 Angstrom for reduction temperatures up to 360 degrees C, and above this a rapid growth of metal particles is seen.
C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973.
NR 31
TC 23
Z9 23
U1 3
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 21
PY 1996
VL 100
IS 12
BP 5070
EP 5077
DI 10.1021/jp9530360
PG 8
WC Chemistry, Physical
SC Chemistry
GA UB162
UT WOS:A1996UB16200054
ER
PT J
AU Luzar, M
Rosen, ME
Caldarelli, S
AF Luzar, M
Rosen, ME
Caldarelli, S
TI Conformational distribution of n-hexane in a nematic liquid crystal
obtained from nuclear spin dipolar couplings by Monte Carlo sampling
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID ORIENTATIONAL ORDER; ALKYL CHAINS; MOLECULES; ANGLE; FIELD
AB Motionally averaged proton-proton dipolar couplings measured by nuclear magnetic resonance (NMR) spectroscopy can provide information about the conformations and orientations sampled by partially oriented molecules. In this study, the measured dipolar couplings between pairs of protons on n-hexane dissolved in a nematic liquid crystal solvent are used as constraints in a Monte Carlo sampling of the conformations and orientations of n-hexane. Rotation about each carbon-carbon bond in the molecule is modeled by the complete sinusoidal torsional potential of Ryckaert and Bellemans rather than by the three-state rotational isomeric states (RIS) model that has been used in previous studies. Comparison of the results of the simulations using the Ryckaert-Bellemans potential and the RIS model indicates little difference in the values of the adjustable parameters and the quality of the fits to the experimental data. The primary difference between the models appears in the calculated conformer probability distributions for n-hexane, highlighting the importance of the exact shape of the torsional potential used to model carbon-carbon bond rotation in organic molecules.
C1 UNIV LJUBLJANA,JOZEF STEFAN INST,LJUBLJANA 61000,SLOVENIA.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720.
RP Luzar, M (reprint author), UNIV LJUBLJANA,DEPT PHYS,JADRANSKA 19,LJUBLJANA 61000,SLOVENIA.
RI Caldarelli, Stefano/B-2750-2017
OI Caldarelli, Stefano/0000-0001-9008-9392
NR 24
TC 8
Z9 9
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 21
PY 1996
VL 100
IS 12
BP 5098
EP 5104
DI 10.1021/jp953271i
PG 7
WC Chemistry, Physical
SC Chemistry
GA UB162
UT WOS:A1996UB16200057
ER
PT J
AU Albright, CH
Nandi, S
AF Albright, CH
Nandi, S
TI An explicit SO(10)xU(1)(F) model of the Yukawa interactions
SO MODERN PHYSICS LETTERS A
LA English
DT Article
ID GRAND UNIFIED THEORIES; SOLAR-NEUTRINO DATA; MASS MATRICES; INVARIANT
FUNCTIONS; STANDARD MODEL; FERMION MASSES; QUARK; OSCILLATIONS;
KAMIOKANDE; ANSATZ
AB We construct an explicit SO(10) x U(1)(F) model of the Yukawa interactions by using as a guide previous phenomenological results obtained from a bottom-up approach to quark and lepton mass matrices. The U(1)(F) family symmetry group sets the textures for the Majorana and generic Dirac mass matrices by restricting the type and number of Higgs diagrams which can contribute to each matrix element, while the SO(10) group relates each particular element of the up, down, neutrino and charged lepton Dirac matrices. The Yukawa couplings and vacuum expectation values associated with pairs of 1, 45, 10 and 126 Higgs representations successfully correlate all the quark and lepton masses and mixings in the scenario incorporating the nonadiabatic solar neutrino and atmospheric neutrino depletion effects.
C1 FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510.
OKLAHOMA STATE UNIV,DEPT PHYS,STILLWATER,OK 74078.
RP Albright, CH (reprint author), NO ILLINOIS UNIV,DEPT PHYS,DE KALB,IL 60115, USA.
OI Albright, Carl/0000-0002-2252-6359
NR 49
TC 13
Z9 13
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA JOURNAL DEPT PO BOX 128 FARRER ROAD, SINGAPORE 9128, SINGAPORE
SN 0217-7323
J9 MOD PHYS LETT A
JI Mod. Phys. Lett. A
PD MAR 21
PY 1996
VL 11
IS 9
BP 737
EP 747
DI 10.1142/S0217732396000746
PG 11
WC Physics, Nuclear; Physics, Particles & Fields; Physics, Mathematical
SC Physics
GA UL338
UT WOS:A1996UL33800005
ER
PT J
AU Akesson, T
Carling, H
Dolgoshein, B
Fabjan, CW
Farthouat, P
Froidevaux, D
Funk, W
Furletov, S
Gavrilenko, I
Holder, M
Ivochkin, VG
Jagielski, S
Kondratiev, O
Konovalov, S
Konstantinov, A
Kopitin, M
Lichard, P
Muraviev, S
Nadtochi, AV
Nevski, P
Norton, PR
Peshekhonov, V
Polychronakos, VA
Potekhin, M
Radeka, V
Richter, R
Ramaniouk, A
Saxon, DH
Schegelsky, VA
Shank, JT
Shmeleva, A
Smirnov, S
Sosnovtsev, V
Spiridenkov, EM
Stavrianakou, M
Stephani, D
Tcherniatin, V
Vassilieva, L
Whitaker, JS
Zaganidis, N
AF Akesson, T
Carling, H
Dolgoshein, B
Fabjan, CW
Farthouat, P
Froidevaux, D
Funk, W
Furletov, S
Gavrilenko, I
Holder, M
Ivochkin, VG
Jagielski, S
Kondratiev, O
Konovalov, S
Konstantinov, A
Kopitin, M
Lichard, P
Muraviev, S
Nadtochi, AV
Nevski, P
Norton, PR
Peshekhonov, V
Polychronakos, VA
Potekhin, M
Radeka, V
Richter, R
Ramaniouk, A
Saxon, DH
Schegelsky, VA
Shank, JT
Shmeleva, A
Smirnov, S
Sosnovtsev, V
Spiridenkov, EM
Stavrianakou, M
Stephani, D
Tcherniatin, V
Vassilieva, L
Whitaker, JS
Zaganidis, N
TI Particle identification performance of a straw transition radiation
tracker prototype
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
ID ENERGY-LOSS
AB An 864 channel prototype of an integrated straw tracker and transition radiation detector for tracking and electron identification has been tested with and without magnetic field at the CERN SPS. The rejection against hadrons and converted photons has been measured and the dependence of the rejection power on detection parameters has been investigated. Tracking and hadron rejection were also studied in a high multiplicity environment. The results are compared with Monte Carlo simulations. Wherever possible, conclusions are drawn concerning the performance of a full-scale detector at the future Large Hadron Collider.
C1 CERN,DIV PPE,CH-1211 GENEVA,SWITZERLAND.
LUND UNIV,LUND,SWEDEN.
MOSCOW ENGN PHYS INST,MOSCOW 115409,RUSSIA.
UNIV SIEGEN,W-5900 SIEGEN,GERMANY.
INST PHYS NUCL,ST PETERSBURG,RUSSIA.
INST NUCL PHYS,KRAKOW,POLAND.
ACAD MIN & MET,KRAKOW,POLAND.
PN LEBEDEV PHYS INST,MOSCOW 117924,RUSSIA.
RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND.
JOINT INST NUCL RES,DUBNA,RUSSIA.
BROOKHAVEN NATL LAB,UPTON,NY 11973.
MAX PLANCK INST,MUNICH,GERMANY.
UNIV GLASGOW,GLASGOW G61 1BD,LANARK,SCOTLAND.
BOSTON UNIV,BOSTON,MA 02215.
RI Gavrilenko, Igor/M-8260-2015; Konovalov, Serguei/M-9505-2015; vasilyeva,
lidia/M-9569-2015; Smirnov, Sergei/F-1014-2011; Shmeleva,
Alevtina/M-6199-2015
OI Smirnov, Sergei/0000-0002-6778-073X;
NR 24
TC 11
Z9 11
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 21
PY 1996
VL 372
IS 1-2
BP 70
EP 84
PG 15
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UH445
UT WOS:A1996UH44500011
ER
PT J
AU Steinhaeuser, P
Gutbrod, HH
Kolb, BW
Purschke, H
Schmidt, HR
Chen, W
Kraner, H
Li, Z
Rehak, P
AF Steinhaeuser, P
Gutbrod, HH
Kolb, BW
Purschke, H
Schmidt, HR
Chen, W
Kraner, H
Li, Z
Rehak, P
TI Investigation of the properties of a radial silicon drift detector in
the WA93-experiment
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
ID ION EXPERIMENT WA80; CALORIMETER; CERN
AB A radial 3-inch silicon drift detector (SiDD), designed by Rehak, was used in the WA93 experiment to measure the production of charged particles and to determine detector characteristics for future applications with even higher multiplicities. Beside correlations with other detectors of the WA93 experiment, a Monte Carlo model and the results of a dedicated experiment with a test beam were used to interpret the S + Au 200 A GeV data. This paper describes the experimental setup and the methods used to extract the properties of the radial SiDD.
C1 GESELL SCHWERIONENFORSCH MBH,D-64220 DARMSTADT,GERMANY.
BROOKHAVEN NATL LAB,UPTON,NY 11973.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 21
PY 1996
VL 372
IS 1-2
BP 85
EP 92
DI 10.1016/0168-9002(95)01245-1
PG 8
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UH445
UT WOS:A1996UH44500012
ER
PT J
AU Adams, D
Bird, F
Coupal, D
Corden, MJ
Xiao, D
Estabrooks, P
Ford, WT
Hamatsu, R
Kondoh, K
Hanson, G
Luehring, F
Hubbard, B
Lockman, WS
OShaughnessy, K
Lee, AM
Zou, B
Palounek, A
Ziock, H
Trilling, G
AF Adams, D
Bird, F
Coupal, D
Corden, MJ
Xiao, D
Estabrooks, P
Ford, WT
Hamatsu, R
Kondoh, K
Hanson, G
Luehring, F
Hubbard, B
Lockman, WS
OShaughnessy, K
Lee, AM
Zou, B
Palounek, A
Ziock, H
Trilling, G
TI Simulation studies of tracking systems at very high luminosity
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
AB Detailed computer simulation studies of a tracking detector originally designed for high luminosity operation at the Superconducting Super Collider have been carried out. Detector simulation and track reconstruction techniques appropriate to the extremely high charged particle rates corresponding to luminosities of up to 10(34) cm(-2) s(-1) are described. The detector performance is evaluated and compared to design requirements stemming from the physics goals of the SDC experiment. The results have implications for the design of tracking detectors at future high luminosity hadron colliders such as the Large Hadron Collider (LHC).
C1 FLORIDA STATE UNIV,SUPERCOMP COMPUTAT RES INST,TALLAHASSEE,FL 32306.
RICE UNIV,BONNER NUCL LAB,HOUSTON,TX 77251.
SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237.
CARLETON UNIV,DEPT PHYS,OTTAWA,ON K1S 5B6,CANADA.
UNIV COLORADO,DEPT PHYS,BOULDER,CO 80309.
TOKYO METROPOLITAN UNIV,DEPT PHYS,TOKYO,JAPAN.
INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405.
UNIV CALIF SANTA CRUZ,INST PARTICLE PHYS,SANTA CRUZ,CA 95064.
DUKE UNIV,DEPT PHYS,DURHAM,NC 27706.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
NR 12
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 21
PY 1996
VL 372
IS 1-2
BP 160
EP 180
DI 10.1016/0168-9002(95)01276-1
PG 21
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UH445
UT WOS:A1996UH44500019
ER
PT J
AU Chen, YK
Cooper, MD
Cooper, PS
Dzemidzic, M
Gagliardi, CA
Hogan, GE
Hungerford, EV
Kim, GJ
Knott, JE
Lan, KJ
Liu, F
Mayes, BW
Mischke, RE
Phelps, R
Pinsky, LS
Stantz, KM
Szymanski, JJ
Tang, LG
Tribble, RE
Tu, XL
VanAusdeln, LA
VonWitsch, W
Wright, CS
AF Chen, YK
Cooper, MD
Cooper, PS
Dzemidzic, M
Gagliardi, CA
Hogan, GE
Hungerford, EV
Kim, GJ
Knott, JE
Lan, KJ
Liu, F
Mayes, BW
Mischke, RE
Phelps, R
Pinsky, LS
Stantz, KM
Szymanski, JJ
Tang, LG
Tribble, RE
Tu, XL
VanAusdeln, LA
VonWitsch, W
Wright, CS
TI Architecture of the MEGA detector trigger
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
AB The trigger for the MEGA detector system is based on signals from single, high-energy photons interacting in one of the three MEGA pair spectrometers. The trigger is divided into a fast and a slow stage. The first stage produces a fast output if a specific pattern of detector hits is observed in the scintillators and high-speed wire chambers of a pair spectrometer. The second, slow-stage interrogates drift chamber hit patterns and provides a veto when the pattern fails a minimal requirement for reconstruction of the hits into a pair of circular orbits. The trigger interacts with the photon detector electronics by gating limited sections of the detector during the read-out of an event. This paper describes the two stage trigger system, the photon detector electronics, and the implementation of the trigger outputs to strobe the data acquisition system. The performance of the trigger is compared to Monte Carlo simulations of the photon detector response.
C1 UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
FERMILAB NATL ACCELERATOR LAB,PHYS SECT,BATAVIA,IL 60510.
TEXAS A&M UNIV,INST CYCLOTRON,COLLEGE STN,TX 77843.
UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637.
NR 7
TC 4
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 21
PY 1996
VL 372
IS 1-2
BP 195
EP 206
DI 10.1016/0168-9002(95)01237-0
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UH445
UT WOS:A1996UH44500022
ER
PT J
AU Reviol, W
Jin, HQ
Riedinger, LL
AF Reviol, W
Jin, HQ
Riedinger, LL
TI Transition energy staggering and band interaction in rare-earth nuclei
SO PHYSICS LETTERS B
LA English
DT Article
DE nuclear structure; properties of nuclei; rotational bands; moments of
inertia; staggering of transition energies; band interaction; relation
between deformation and superdeformation
ID SPIN; SPECTROSCOPY; STATES
AB Staggering of the transition energies E(gamma) and moments of inertia J((2)) for rotational bands in rare-earth nuclei is investigated by means of the higher order derivatives Delta(n)E(gamma) (n = 2,3,4). It is shown that these (Delta I = 2) staggering effects in the normally deformed bands are related to band interaction. The band interaction picture is also applied to staggering effects in superdeformed bands.
C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831.
RP Reviol, W (reprint author), UNIV TENNESSEE,DEPT PHYS,KNOXVILLE,TN 37996, USA.
NR 16
TC 23
Z9 23
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 21
PY 1996
VL 371
IS 1-2
BP 19
EP 24
DI 10.1016/0370-2693(95)01597-3
PG 6
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UB860
UT WOS:A1996UB86000004
ER
PT J
AU Murayama, H
Olechowski, M
Pokorski, S
AF Murayama, H
Olechowski, M
Pokorski, S
TI Viable t-b-tau Yukawa unification in SUSY SO(10)
SO PHYSICS LETTERS B
LA English
DT Article
ID N=1 SUPERGRAVITY MODELS; GRAND UNIFIED THEORIES; SYMMETRY-BREAKING;
SU(2)XU(1) BREAKING; MASSES; SPECTRUM
AB The supersymmetric SO(10) GUT with t-b-tau Yukawa coupling unification has problems with correct electroweak symmetry breaking, experimental constraints (especially b --> sy) and neutralino abundance, if the scalar masses are universal at the GUT scale. We point out that non-universality of the scalar masses at the GUT scale generated both by (1) renormalization group running from the Planck scale to the GUT scale and (2) D-term contribution induced by the reduction of the rank of the gauge group, has a desirable pattern to make the model phemenologically viable (in fact the only one which is consistent with experimental and cosmological constraints). At the same time the top quark mass has to be either close to its quasi TR-fixed point value or below similar to 170 GeV. We also briefly discuss the spectrum of superpartners which is then obtained.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720.
IST NAZL FIS NUCL,SEZ TORINO,I-10125 TURIN,ITALY.
MAX PLANCK INST PHYS & ASTROPHYS,D-80805 MUNICH,GERMANY.
RP Murayama, H (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA.
RI Murayama, Hitoshi/A-4286-2011
NR 44
TC 61
Z9 61
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 21
PY 1996
VL 371
IS 1-2
BP 57
EP 64
DI 10.1016/0370-2693(95)01611-2
PG 8
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UB860
UT WOS:A1996UB86000010
ER
PT J
AU Acciarri, M
Adam, A
Adriani, O
AguilarBenitez, M
Ahlen, S
Alpat, B
Alcaraz, J
Allaby, J
Aloisio, A
Alverson, G
Alviggi, MG
Ambrosi, G
Anderhub, H
Andreev, VP
Angelescu, T
Antreasyan, D
Arefiev, A
Azemoon, T
Aziz, T
Bagnaia, P
Baksay, L
Ball, RC
Banerjee, S
Banicz, K
Barillere, R
Barone, L
Bartalini, P
Baschirotto, A
Basile, M
Battiston, R
Bay, A
Becattini, F
Becker, U
Behner, F
Bencze, GL
Berdugo, J
Berges, P
Bertucci, B
Betev, BL
Biasini, M
Biland, A
Bilei, GM
Blaising, JJ
Bobbink, GJ
Bock, R
Bohm, A
Borgia, B
Boucham, A
Bourilkov, D
Bourquin, M
Boutigny, D
Brambilla, E
Branson, JG
Brigljevic, V
Brock, IC
Buijs, A
Bujak, A
Burger, JD
Burger, WJ
Burgos, C
Busenitz, J
Buytenhuijs, A
Cai, XD
Campanelli, M
Capell, M
Romeo, GC
Caria, M
Carlino, G
Cartacci, AM
Casaus, J
Castellini, G
Castello, R
Cavallari, F
Cavallo, N
Cecchi, C
Cerrada, M
Cesaroni, F
Chamizo, M
Chan, A
Chang, YH
Chaturvedi, UK
Chemarin, M
Chen, A
Chen, C
Chen, G
Chen, GM
Chen, HF
Chen, HS
Chen, M
Chereau, X
Chiefari, G
Chien, CY
Choi, MT
Cifarelli, L
Cindolo, F
Cohn, HO
Coignet, G
Colijn, AP
Civinini, C
Clare, I
Clare, R
Coan, TE
Colino, N
Commichau, V
Costantini, S
Cotorobai, F
delaCruz, B
Dai, TS
DAlessandro, R
deAsmundis, R
DeBoeck, H
Degre, A
Deiters, K
Denes, E
Denes, P
DeNotaristefani, F
DiBitonto, D
Diemoz, M
vanDierendonck, D
DiLodovico, F
Dionisi, C
Dittmar, M
Dominguez, A
Doria, A
Dorne, I
Dova, MT
Drago, E
Duchesneau, D
Duinker, P
Duran, I
Dutta, S
Easo, S
Efremenko, Y
ElMamouni, H
Engler, A
Eppling, FJ
Erne, FC
Ernenwein, JP
Extermann, P
Fabbretti, R
Fabre, M
Faccini, R
Falciano, S
Favara, A
Fay, J
Felcini, M
Ferguson, T
Fernandez, D
Fernandez, G
Ferroni, F
Fesefeldt, H
Fiandrini, E
Field, JH
Filthaut, F
Fisher, PH
Forconi, G
Fredj, L
Freudenreich, K
Gailloud, M
Galaktionov, Y
Ganguli, SN
GarciaAbia, P
Gau, SS
Gentile, S
Gerald, J
Gheordanescu, N
Giagu, S
Goldfarb, S
Goldstein, J
Gong, ZE
Gonzalez, E
Gougas, A
Goujon, D
Gratta, G
Gruenewald, MW
Gupta, VK
Gurtu, A
Gustafson, HR
Gutay, LJ
Hartmann, B
Hasan, A
He, JT
Hebbeker, T
Herve, A
Hilgers, K
vanHoek, WC
Hofer, H
Hoorani, H
Hou, SR
Hu, G
Ilyas, MM
Innocente, V
Janssen, H
Jin, BN
Jones, LW
deJong, P
JosaMutuberria, I
Kasser, A
Khan, RA
Kamyshkov, Y
Kapinos, P
Kapustinsky, JS
Karyotakis, Y
Kaur, M
KienzleFocacci, MN
Kim, D
Kim, JK
Kim, SC
Kim, YG
Kinnison, WW
Kirkby, A
Kirkby, D
Kirkby, J
Kittel, W
Klimentov, A
Konig, AC
Koffeman, E
Kornadt, O
Koutsenko, V
Koulbardis, A
Kraemer, RW
Kramer, T
Krenz, W
Kuijten, H
Kunin, A
deGuevara, PL
Landi, G
Lapoint, C
LassilaPerini, K
Laurikainen, P
Lebeau, M
Lebedev, A
Lebrun, P
Lecomte, P
Lecoq, P
LeCoultre, P
Lee, JS
Lee, KY
Leggett, C
LeGoff, JM
Leiste, R
Lenti, M
Leonardi, E
Levtchenko, P
Li, C
Lieb, E
Lin, WT
Linde, FL
Lindemann, B
Lista, L
Liu, ZA
Lohmann, W
Longo, E
Lu, W
Lu, YS
Lubelsmeyer, K
Luci, C
Luckey, D
Ludovici, L
Luminari, L
Lustermann, W
Ma, WG
Macchiolo, A
Maity, M
Majumder, G
Malgeri, L
Malinin, A
Mana, C
Mangla, S
Maolinbay, M
Marchesini, P
Marin, A
Martin, JP
Marzano, F
Massaro, GGG
Mazumdar, K
McNally, D
Mele, S
Merola, L
Meschini, M
Metzger, WJ
Mi, Y
Mihul, A
vanMil, AJW
Mirabelli, G
Mnich, J
Moller, M
Monteleoni, B
Moore, R
Morganti, S
Mount, R
Muller, S
Muheim, F
Nagy, E
Nahn, S
Napolitano, M
NessiTedaldi, F
Newman, H
Nippe, A
Nowak, H
Organtini, G
Ostonen, R
Pandoulas, D
Paoletti, S
Paolucci, P
Pascale, G
Passaleva, G
Patricelli, S
Paul, T
Pauluzzi, M
Paus, C
Pauss, F
Pei, YJ
Pensotti, S
PerretGallix, D
Petrak, S
Pevsner, A
Piccolo, D
Pieri, M
Pinto, JC
Piroue, PA
Pistolesi, E
Plyaskin, V
Pohl, M
Pojidaev, V
Postema, H
Produit, N
Raghavan, R
RahalCallot, G
Rancoita, PG
Rattaggi, M
Raven, G
Razis, P
Read, K
Redaelli, M
Ren, D
Rescigno, M
Reucroft, S
Ricker, A
Riemann, S
Riemers, BC
Riles, K
Rind, O
Ro, S
Robohm, A
Rodin, J
Rodriguez, FJ
Roe, BP
Rohner, M
Rohner, S
Romero, L
RosierLees, S
Rosselet, P
vanRossum, W
Roth, S
Rubio, JA
Rykaczewski, H
Salicio, J
Salicio, JM
Sanchez, E
Santocchia, A
Sarakinos, ME
Sarkar, S
Sassowsky, M
Sauvage, G
Schafer, C
Schegelsky, V
Schmitz, D
Schmitz, P
Schneegans, M
Schoeneich, B
Scholz, N
Schopper, H
Schotanus, DJ
Schulte, R
Schultze, K
Schwenke, J
Schwering, G
Sciacca, C
Seiler, PG
Sens, JC
Servoli, L
Shevchenko, S
Shivarov, N
Shoutko, V
Shukla, J
Shumilov, E
Son, D
Sopczak, A
Soulimov, V
Smith, B
Spickermann, T
Spillantini, P
Steuer, M
Stickland, DP
Sticozzi, F
Stone, H
Stoyanov, B
Strauch, K
Sudhakar, K
Sultanov, G
Sun, LZ
Susinno, GF
Suter, H
Swain, JD
Tang, XW
Tauscher, L
Taylor, L
Ting, SCC
Ting, SM
Toker, O
Tonisch, F
Tonutti, M
Tonwar, SC
Toth, J
Tsaregorodtsev, A
Tsipolitis, G
Tully, C
Tuchscherer, H
Ulbricht, J
Urban, L
Uwer, U
Valente, E
vandeWalle, RT
Vetlitsky, I
Viertel, G
Vivargent, M
Volkert, R
Vogel, H
Vogt, H
Vorobiev, I
Vorobyov, AA
Vorobyov, AA
Vuilleumier, L
Wadhwa, M
Wallraff, W
Wang, JC
Wang, XL
Wang, YF
Wang, ZM
Weber, A
Weill, R
Willmott, C
Wittgenstein, E
Wu, SX
Wynhoff, S
Xu, J
Xu, ZZ
Yang, BZ
Yang, CG
Yao, XY
Ye, JB
Yeh, SC
You, JM
Zaccardelli, C
Zalite, A
Zemp, P
Zeng, JY
Zeng, Y
Zhang, Z
Zhang, ZP
Zhou, B
Zhou, GJ
Zhou, JF
Zhou, Y
Zhu, GY
Zhu, RY
Zichichi, A
vanderZwaan, BCC
AF Acciarri, M
Adam, A
Adriani, O
AguilarBenitez, M
Ahlen, S
Alpat, B
Alcaraz, J
Allaby, J
Aloisio, A
Alverson, G
Alviggi, MG
Ambrosi, G
Anderhub, H
Andreev, VP
Angelescu, T
Antreasyan, D
Arefiev, A
Azemoon, T
Aziz, T
Bagnaia, P
Baksay, L
Ball, RC
Banerjee, S
Banicz, K
Barillere, R
Barone, L
Bartalini, P
Baschirotto, A
Basile, M
Battiston, R
Bay, A
Becattini, F
Becker, U
Behner, F
Bencze, GL
Berdugo, J
Berges, P
Bertucci, B
Betev, BL
Biasini, M
Biland, A
Bilei, GM
Blaising, JJ
Bobbink, GJ
Bock, R
Bohm, A
Borgia, B
Boucham, A
Bourilkov, D
Bourquin, M
Boutigny, D
Brambilla, E
Branson, JG
Brigljevic, V
Brock, IC
Buijs, A
Bujak, A
Burger, JD
Burger, WJ
Burgos, C
Busenitz, J
Buytenhuijs, A
Cai, XD
Campanelli, M
Capell, M
Romeo, GC
Caria, M
Carlino, G
Cartacci, AM
Casaus, J
Castellini, G
Castello, R
Cavallari, F
Cavallo, N
Cecchi, C
Cerrada, M
Cesaroni, F
Chamizo, M
Chan, A
Chang, YH
Chaturvedi, UK
Chemarin, M
Chen, A
Chen, C
Chen, G
Chen, GM
Chen, HF
Chen, HS
Chen, M
Chereau, X
Chiefari, G
Chien, CY
Choi, MT
Cifarelli, L
Cindolo, F
Cohn, HO
Coignet, G
Colijn, AP
Civinini, C
Clare, I
Clare, R
Coan, TE
Colino, N
Commichau, V
Costantini, S
Cotorobai, F
delaCruz, B
Dai, TS
DAlessandro, R
deAsmundis, R
DeBoeck, H
Degre, A
Deiters, K
Denes, E
Denes, P
DeNotaristefani, F
DiBitonto, D
Diemoz, M
vanDierendonck, D
DiLodovico, F
Dionisi, C
Dittmar, M
Dominguez, A
Doria, A
Dorne, I
Dova, MT
Drago, E
Duchesneau, D
Duinker, P
Duran, I
Dutta, S
Easo, S
Efremenko, Y
ElMamouni, H
Engler, A
Eppling, FJ
Erne, FC
Ernenwein, JP
Extermann, P
Fabbretti, R
Fabre, M
Faccini, R
Falciano, S
Favara, A
Fay, J
Felcini, M
Ferguson, T
Fernandez, D
Fernandez, G
Ferroni, F
Fesefeldt, H
Fiandrini, E
Field, JH
Filthaut, F
Fisher, PH
Forconi, G
Fredj, L
Freudenreich, K
Gailloud, M
Galaktionov, Y
Ganguli, SN
GarciaAbia, P
Gau, SS
Gentile, S
Gerald, J
Gheordanescu, N
Giagu, S
Goldfarb, S
Goldstein, J
Gong, ZE
Gonzalez, E
Gougas, A
Goujon, D
Gratta, G
Gruenewald, MW
Gupta, VK
Gurtu, A
Gustafson, HR
Gutay, LJ
Hartmann, B
Hasan, A
He, JT
Hebbeker, T
Herve, A
Hilgers, K
vanHoek, WC
Hofer, H
Hoorani, H
Hou, SR
Hu, G
Ilyas, MM
Innocente, V
Janssen, H
Jin, BN
Jones, LW
deJong, P
JosaMutuberria, I
Kasser, A
Khan, RA
Kamyshkov, Y
Kapinos, P
Kapustinsky, JS
Karyotakis, Y
Kaur, M
KienzleFocacci, MN
Kim, D
Kim, JK
Kim, SC
Kim, YG
Kinnison, WW
Kirkby, A
Kirkby, D
Kirkby, J
Kittel, W
Klimentov, A
Konig, AC
Koffeman, E
Kornadt, O
Koutsenko, V
Koulbardis, A
Kraemer, RW
Kramer, T
Krenz, W
Kuijten, H
Kunin, A
deGuevara, PL
Landi, G
Lapoint, C
LassilaPerini, K
Laurikainen, P
Lebeau, M
Lebedev, A
Lebrun, P
Lecomte, P
Lecoq, P
LeCoultre, P
Lee, JS
Lee, KY
Leggett, C
LeGoff, JM
Leiste, R
Lenti, M
Leonardi, E
Levtchenko, P
Li, C
Lieb, E
Lin, WT
Linde, FL
Lindemann, B
Lista, L
Liu, ZA
Lohmann, W
Longo, E
Lu, W
Lu, YS
Lubelsmeyer, K
Luci, C
Luckey, D
Ludovici, L
Luminari, L
Lustermann, W
Ma, WG
Macchiolo, A
Maity, M
Majumder, G
Malgeri, L
Malinin, A
Mana, C
Mangla, S
Maolinbay, M
Marchesini, P
Marin, A
Martin, JP
Marzano, F
Massaro, GGG
Mazumdar, K
McNally, D
Mele, S
Merola, L
Meschini, M
Metzger, WJ
Mi, Y
Mihul, A
vanMil, AJW
Mirabelli, G
Mnich, J
Moller, M
Monteleoni, B
Moore, R
Morganti, S
Mount, R
Muller, S
Muheim, F
Nagy, E
Nahn, S
Napolitano, M
NessiTedaldi, F
Newman, H
Nippe, A
Nowak, H
Organtini, G
Ostonen, R
Pandoulas, D
Paoletti, S
Paolucci, P
Pascale, G
Passaleva, G
Patricelli, S
Paul, T
Pauluzzi, M
Paus, C
Pauss, F
Pei, YJ
Pensotti, S
PerretGallix, D
Petrak, S
Pevsner, A
Piccolo, D
Pieri, M
Pinto, JC
Piroue, PA
Pistolesi, E
Plyaskin, V
Pohl, M
Pojidaev, V
Postema, H
Produit, N
Raghavan, R
RahalCallot, G
Rancoita, PG
Rattaggi, M
Raven, G
Razis, P
Read, K
Redaelli, M
Ren, D
Rescigno, M
Reucroft, S
Ricker, A
Riemann, S
Riemers, BC
Riles, K
Rind, O
Ro, S
Robohm, A
Rodin, J
Rodriguez, FJ
Roe, BP
Rohner, M
Rohner, S
Romero, L
RosierLees, S
Rosselet, P
vanRossum, W
Roth, S
Rubio, JA
Rykaczewski, H
Salicio, J
Salicio, JM
Sanchez, E
Santocchia, A
Sarakinos, ME
Sarkar, S
Sassowsky, M
Sauvage, G
Schafer, C
Schegelsky, V
Schmitz, D
Schmitz, P
Schneegans, M
Schoeneich, B
Scholz, N
Schopper, H
Schotanus, DJ
Schulte, R
Schultze, K
Schwenke, J
Schwering, G
Sciacca, C
Seiler, PG
Sens, JC
Servoli, L
Shevchenko, S
Shivarov, N
Shoutko, V
Shukla, J
Shumilov, E
Son, D
Sopczak, A
Soulimov, V
Smith, B
Spickermann, T
Spillantini, P
Steuer, M
Stickland, DP
Sticozzi, F
Stone, H
Stoyanov, B
Strauch, K
Sudhakar, K
Sultanov, G
Sun, LZ
Susinno, GF
Suter, H
Swain, JD
Tang, XW
Tauscher, L
Taylor, L
Ting, SCC
Ting, SM
Toker, O
Tonisch, F
Tonutti, M
Tonwar, SC
Toth, J
Tsaregorodtsev, A
Tsipolitis, G
Tully, C
Tuchscherer, H
Ulbricht, J
Urban, L
Uwer, U
Valente, E
vandeWalle, RT
Vetlitsky, I
Viertel, G
Vivargent, M
Volkert, R
Vogel, H
Vogt, H
Vorobiev, I
Vorobyov, AA
Vorobyov, AA
Vuilleumier, L
Wadhwa, M
Wallraff, W
Wang, JC
Wang, XL
Wang, YF
Wang, ZM
Weber, A
Weill, R
Willmott, C
Wittgenstein, E
Wu, SX
Wynhoff, S
Xu, J
Xu, ZZ
Yang, BZ
Yang, CG
Yao, XY
Ye, JB
Yeh, SC
You, JM
Zaccardelli, C
Zalite, A
Zemp, P
Zeng, JY
Zeng, Y
Zhang, Z
Zhang, ZP
Zhou, B
Zhou, GJ
Zhou, JF
Zhou, Y
Zhu, GY
Zhu, RY
Zichichi, A
vanderZwaan, BCC
TI Measurement of eta production in two and three-jet events from hadronic
Z decays at LEP
SO PHYSICS LETTERS B
LA English
DT Article
ID LUND MONTE-CARLO; SQUARE-ROOT-S; MESON PRODUCTION; L3 EXPERIMENT;
E+E-PHYSICS; FRAGMENTATION; ANNIHILATION; PI-0
AB The inclusive production of eta mesons has been studied using 1.6 million hadronic Z decays collected with the L3 detector. The eta multiplicity per event, the multiplicity for two-jet and three-jet events separately, and the multiplicity in each jet have been measured and compared with the predictions of different Monte Carlo programs. The momentum spectra of eta in each jet have also been measured, We observe that the measured eta momentum spectrum in quark-enriched jets agrees well with the Monte Carlo prediction while in gluon-enriched jets it is harder than that predicted by the Monte Carlo models.
C1 RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY.
NIKHEF H, NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS.
UNIV AMSTERDAM, 1009 DB AMSTERDAM, NETHERLANDS.
UNIV MICHIGAN, ANN ARBOR, MI 48109 USA.
LAB ANNECY VIEUX PHYS PARTICLES, IN2P3, CNRS, F-74941 ANNECY LE VIEUX, FRANCE.
JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA.
UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND.
INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA.
HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY.
IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY.
TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA.
BOSTON UNIV, BOSTON, MA 02215 USA.
NORTHEASTERN UNIV, BOSTON, MA 02115 USA.
INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA.
UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA.
HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY.
HARVARD UNIV, CAMBRIDGE, MA 02139 USA.
MIT, CAMBRIDGE, MA 02139 USA.
IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY.
UNIV FLORENCE, I-50125 FLORENCE, ITALY.
CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND.
WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND.
UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND.
CHINESE UNIV SCI & TECHNOL, USTC, HEFEI 230029, ANHUI, PEOPLES R CHINA.
RES INST HIGH ENERGY PHYS, SEFT, SF-00014 HELSINKI, FINLAND.
UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND.
LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA.
UNIV LYON 1, CNRS, IN2P3, INST PHYS NUCL LYON, F-69622 VILLEURBANNE, FRANCE.
CIEMAT, E-28040 MADRID, SPAIN.
INST THEORET & EXPTL PHYS, MOSCOW, RUSSIA.
UNIV NAPLES, I-80125 NAPLES, ITALY.
IST NAZL FIS NUCL, I-80125 NAPLES, ITALY.
UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS.
UNIV NYMEGEN, 6525 ED NIJMEGEN, NETHERLANDS.
NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS.
OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA.
CALTECH, PASADENA, CA 91125 USA.
UNIV PERUGIA, I-06100 PERUGIA, ITALY.
IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY.
CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA.
PRINCETON UNIV, PRINCETON, NJ 08544 USA.
IST NAZL FIS NUCL, I-00185 ROME, ITALY.
UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY.
INST PHYS NUCL, ST PETERSBURG, RUSSIA.
UNIV SALERNO, I-84100 SALERNO, ITALY.
IST NAZL FIS NUCL, I-84100 SALERNO, ITALY.
UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92093 USA.
UNIV SANTIAGO, DEPT FIS PARTICLAS ELEMENTALES, E-15706 SANTIAGO, SPAIN.
BULGARIAN ACAD SCI, CENT LAB MECHATRON & INSTRUMENTAT, BU-1113 SOFIA, BULGARIA.
KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA.
UNIV ALABAMA, TUSCALOOSA, AL 35486 USA.
UNIV UTRECHT, 3584 CB UTRECHT, NETHERLANDS.
NIKHEF H, 3584 CB UTRECHT, NETHERLANDS.
PURDUE UNIV, W LAFAYETTE, IN 47907 USA.
PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND.
DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY.
ETH ZURICH, CH-8093 ZURICH, SWITZERLAND.
UNIV HAMBURG, D-22761 HAMBURG, GERMANY.
RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY.
RP IST NAZL FIS NUCL, I-20133 MILAN, ITALY.
RI Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015; van der
Zwaan, Bob/F-4070-2015; D'Alessandro, Raffaello/F-5897-2015; Sanchez,
Eusebio/H-5228-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge,
francisco javier/H-9682-2015; Rancoita, Pier Giorgio/J-9896-2015;
Hoorani, Hafeez/D-1791-2013; Roth, Stefan/J-2757-2016; Kamyshkov,
Yuri/J-7999-2016; de la Cruz, Begona/K-7552-2014; Josa,
Isabel/K-5184-2014; Gonzalez Romero, Enrique/L-7561-2014; Vogel,
Helmut/N-8882-2014; Fiandrini, Emanuele/C-4549-2008; Lista,
Luca/C-5719-2008; Ludovici, Lucio/F-5917-2011; Kirkby,
Jasper/A-4973-2012; Servoli, Leonello/E-6766-2012; alpat, ali
behcet/G-6290-2013; bertucci, bruna/J-5237-2012; Cavallo,
Nicola/F-8913-2012; Cerrada, Marcos/J-6934-2014
OI Filthaut, Frank/0000-0003-3338-2247; Goldstein,
Joel/0000-0003-1591-6014; Ferguson, Thomas/0000-0001-5822-3731; Berdugo,
Javier/0000-0002-7911-8532; van der Zwaan, Bob/0000-0001-5871-7643;
D'Alessandro, Raffaello/0000-0001-7997-0306; Sanchez,
Eusebio/0000-0002-9646-8198; Rancoita, Pier Giorgio/0000-0002-1990-4283;
Roth, Stefan/0000-0003-3616-2223; Kamyshkov, Yuri/0000-0002-3789-7152;
Gonzalez Romero, Enrique/0000-0003-2376-8920; Vogel,
Helmut/0000-0002-6109-3023; Ludovici, Lucio/0000-0003-1970-9960; Kirkby,
Jasper/0000-0003-2341-9069; Servoli, Leonello/0000-0003-1725-9185;
alpat, ali behcet/0000-0002-0116-1506; Cerrada,
Marcos/0000-0003-0112-1691
NR 33
TC 19
Z9 19
U1 1
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 21
PY 1996
VL 371
IS 1-2
BP 126
EP 136
DI 10.1016/0370-2693(96)00095-0
PG 11
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UB860
UT WOS:A1996UB86000021
ER
PT J
AU Acciarri, M
Adam, A
Adriani, O
AguilarBenitez, M
Ahlen, S
Alpat, B
Alcaraz, J
Allaby, J
Aloisio, A
Alverson, G
Alviggi, MG
Ambrosi, G
Anderhub, H
Andreev, VP
Angelescu, T
Antreasyan, D
Arefiev, A
Azemoon, T
Aziz, T
Bagnaia, P
Baksay, L
Ball, RC
Banerjee, S
Banicz, K
Barillere, R
Barone, L
Bartalini, P
Baschirotto, A
Basile, M
Battiston, R
Bay, A
Becattini, F
Becker, U
Behner, F
Bencze, GL
Berdugo, J
Berges, P
Bertucci, B
Betev, BL
Biasini, M
Biland, A
Bilei, GM
Blaising, JJ
Blyth, SC
Bobbink, GJ
Bock, R
Bohm, A
Borgia, B
Boucham, A
Bourilkov, D
Bourquin, M
Boutigny, D
Brambilla, E
Branson, JG
Brigljevic, V
Brock, IC
Buijs, A
Bujak, A
Burger, JD
Burger, WJ
Burgos, C
Busenitz, J
Buytenhuijs, A
Cai, XD
Campanelli, M
Capell, M
Romeo, GC
Caria, M
Carlino, G
Cartacci, AM
Casaus, J
Castellini, G
Castello, R
Cavallari, F
Cavallo, N
Cecchi, C
Cerrada, M
Cesaroni, F
Chamizo, M
Chan, A
Chang, YH
Chaturvedi, UK
Chemarin, M
Chen, A
Chen, C
Chen, G
Chen, GM
Chen, HF
Chen, HS
Chereau, X
Chiefari, G
Chien, CY
Choi, MT
Cifarelli, L
Cindolo, F
Civinini, C
Clare, I
Clare, R
Coan, TE
Cohn, HO
Coignet, G
Colijn, AP
Colino, N
Commichau, V
Costantini, S
Cotorobai, F
delaCruz, B
Dai, TS
DAlessandro, R
deAsmundis, R
DeBoeck, H
Degre, A
Deiters, K
Denes, E
Denes, P
DeNotaristefani, F
DiBitonto, D
Diemoz, M
vanDierendonck, D
DiLodovico, F
Dionisi, C
Dittmar, M
Dominguez, A
Doria, A
Dorne, I
Dova, MT
Drago, E
Duchesneau, D
Duinker, P
Duran, I
Dutta, S
Easo, S
Efremenko, Y
ElMamouni, H
Engler, A
Eppling, FJ
Erne, FC
Ernenwein, JP
Extermann, P
Fabbretti, R
Fabre, M
Faccini, R
Falciano, S
Favara, A
Fay, J
Felcini, M
Ferguson, T
Fernandez, D
Fernandez, G
Ferroni, F
Fesefeldt, H
Fiandrini, E
Field, JH
Filthaut, F
Fisher, PH
Forconi, G
Fredj, L
Freudenreich, K
Gailloud, M
Galaktionov, Y
Ganguli, SN
GarciaAbia, P
Gau, SS
Gentile, S
Gerald, J
Gheordanescu, N
Giagu, S
Goldfarb, S
Goldstein, J
Gong, ZF
Gonzalez, E
Gougas, A
Goujon, D
Gratta, G
Gruenewald, MW
Gupta, VK
Gurtu, A
Gustafson, HR
Gutay, LJ
Hangarter, K
Hartmann, B
Hasan, A
He, JT
Hebbeker, T
Herve, A
vanHoek, WC
Hofer, H
Hoorani, H
Hou, SR
Hu, G
Ilyas, MM
Innocente, V
Janssen, H
Jin, BN
Jones, LW
deJong, P
JosaMutuberria, I
Kasser, A
Khan, RA
Kamyshkov, Y
Kapinos, P
Kapustinsky, JS
Karyotakis, Y
Kaur, M
KienzleFocacci, MN
Kim, D
Kim, JK
Kim, SC
Kim, YG
Kinnison, WW
Kirkby, A
Kirkby, D
Kirkby, J
Kittel, W
Klimentov, A
Konig, AC
Koffeman, E
Kongeter, A
Koutsenko, V
Koulbardis, A
Kraemer, RW
Kramer, T
Krenz, W
Kuijten, H
Kunin, A
deGuevara, PL
Landi, G
Lapoint, C
LassilaPerini, K
Laurikainen, P
Lebeau, M
Lebedev, A
Lebrun, P
Lecomte, P
Lecoq, P
LeCoultre, P
Lee, JS
Lee, KY
Leggett, C
LeGoff, JM
Leiste, R
Lenti, M
Leonardi, E
Levtchenko, P
Li, C
Lieb, E
Lin, WT
Linde, FL
Lindemann, B
Lista, L
Liu, ZA
Lohmann, W
Longo, E
Lu, W
Lu, YS
Lubelsmeyer, K
Luci, C
Luckey, D
Ludovici, L
Luminari, L
Lustermann, W
Ma, WG
Macchiolo, A
Maity, M
Majumder, G
Malgeri, L
Malinin, A
Mana, C
Mangla, S
Maolinbay, M
Marchesini, P
Marin, A
Martin, JP
Marzano, F
Massaro, GGG
Mazumdar, K
McNally, D
McNeil, RR
Mele, S
Merola, L
Meschini, M
Metzger, WJ
vonderMey, M
Mi, Y
Mihul, A
vanMil, AJW
Mirabelli, G
Mnich, J
Moller, M
Monteleoni, B
Moore, R
Morganti, S
Mount, R
Muller, S
Muheim, F
Nagy, E
Nahn, S
Napolitano, M
NessiTedaldi, F
Newman, H
Nippe, A
Nowak, H
Organtini, G
Ostonen, R
Pandoulas, D
Paoletti, S
Paolucci, P
Park, HK
Pascale, G
Passaleva, G
Patricelli, S
Paul, T
Pauluzzi, M
Paus, C
Pauss, F
Pei, YJ
Pensotti, S
PerretGallix, D
Petrak, S
Pevsner, A
Piccolo, D
Pieri, M
Pinto, JC
Piroue, PA
Pistolesi, E
Plyaskin, V
Pohl, M
Pojidaev, V
Postema, H
Produit, N
Raghavan, R
RahalCallot, G
Rancoita, PG
Rattaggi, M
Raven, G
Razis, P
Read, K
Redaelli, M
Den, D
Rescigno, M
Reucroft, S
Ricker, A
Riemann, S
Riemers, BC
Riles, K
Rind, O
Ro, S
Robohm, S
Rodin, J
Rodriguez, FJ
Roe, BP
Rohner, S
Romero, L
RosierLees, S
Rosselet, P
vanRossum, W
Roth, S
Rubio, JA
Rykaczewski, H
Salicio, J
Salicio, JM
Sanchez, E
Santocchia, A
Sarakinos, ME
Sarkar, S
Sassowsky, M
Schafer, C
Schegelsky, V
SchmidtKaerst, S
Schmitz, D
Schmitz, P
Schneegans, M
Schoeneich, B
Scholz, N
Schopper, H
Schotanus, DJ
Schulte, R
Schultze, K
Schwenke, J
Schwering, G
Sciacca, C
Seiler, PG
Sens, JC
Servoli, L
Shevchenko, S
Shivarov, N
Shoutko, V
Shukla, J
Shumilov, E
Siedenburg, T
Son, D
Sopczak, A
Soulimov, V
Smith, B
Spillantini, P
Steuer, M
Stickland, DP
Sticozzi, F
Stone, H
Stoyanov, B
Straessner, A
Strauch, K
Sudhakar, K
Sultanov, G
Sun, LZ
Susinno, GF
Suter, H
Swain, JD
Tang, XW
Tauscher, L
Taylor, L
Ting, SCC
Ting, SM
Toker, O
Tonisch, F
Tonutti, M
Tonwar, SC
Toth, J
Tsaregorodtsev, A
Tully, C
Tuchscherer, H
Tung, KL
Ulbricht, J
Urban, L
Uwer, U
Valente, E
VandeWalle, RT
Vetlitsky, I
Viertel, G
Vivargent, M
Volkert, R
Vogel, H
Vogt, H
Vorobiev, I
Vorobyov, AA
Vorobyov, AA
Vuilleumier, L
Wadhwa, M
Wallraff, W
Wang, JC
Wang, XL
Wang, YF
Wang, ZM
Weber, A
Weill, R
Willmott, C
Wittgenstein, F
Wu, SX
Wynhoff, S
Xu, J
Xu, ZZ
Yang, BZ
Yang, CG
Yao, XY
Ye, JB
Yeh, SC
You, JM
Zaccardelli, C
Zalite, A
Zemp, P
Zeng, JY
Zeng, Y
Zhang, Z
Zhang, ZP
Zhou, B
Zhou, GJ
Zhou, Y
Zhu, GY
Zhu, RY
Zichichi, A
vanderZwaan, BCC
AF Acciarri, M
Adam, A
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Goujon, D
Gratta, G
Gruenewald, MW
Gupta, VK
Gurtu, A
Gustafson, HR
Gutay, LJ
Hangarter, K
Hartmann, B
Hasan, A
He, JT
Hebbeker, T
Herve, A
vanHoek, WC
Hofer, H
Hoorani, H
Hou, SR
Hu, G
Ilyas, MM
Innocente, V
Janssen, H
Jin, BN
Jones, LW
deJong, P
JosaMutuberria, I
Kasser, A
Khan, RA
Kamyshkov, Y
Kapinos, P
Kapustinsky, JS
Karyotakis, Y
Kaur, M
KienzleFocacci, MN
Kim, D
Kim, JK
Kim, SC
Kim, YG
Kinnison, WW
Kirkby, A
Kirkby, D
Kirkby, J
Kittel, W
Klimentov, A
Konig, AC
Koffeman, E
Kongeter, A
Koutsenko, V
Koulbardis, A
Kraemer, RW
Kramer, T
Krenz, W
Kuijten, H
Kunin, A
deGuevara, PL
Landi, G
Lapoint, C
LassilaPerini, K
Laurikainen, P
Lebeau, M
Lebedev, A
Lebrun, P
Lecomte, P
Lecoq, P
LeCoultre, P
Lee, JS
Lee, KY
Leggett, C
LeGoff, JM
Leiste, R
Lenti, M
Leonardi, E
Levtchenko, P
Li, C
Lieb, E
Lin, WT
Linde, FL
Lindemann, B
Lista, L
Liu, ZA
Lohmann, W
Longo, E
Lu, W
Lu, YS
Lubelsmeyer, K
Luci, C
Luckey, D
Ludovici, L
Luminari, L
Lustermann, W
Ma, WG
Macchiolo, A
Maity, M
Majumder, G
Malgeri, L
Malinin, A
Mana, C
Mangla, S
Maolinbay, M
Marchesini, P
Marin, A
Martin, JP
Marzano, F
Massaro, GGG
Mazumdar, K
McNally, D
McNeil, RR
Mele, S
Merola, L
Meschini, M
Metzger, WJ
vonderMey, M
Mi, Y
Mihul, A
vanMil, AJW
Mirabelli, G
Mnich, J
Moller, M
Monteleoni, B
Moore, R
Morganti, S
Mount, R
Muller, S
Muheim, F
Nagy, E
Nahn, S
Napolitano, M
NessiTedaldi, F
Newman, H
Nippe, A
Nowak, H
Organtini, G
Ostonen, R
Pandoulas, D
Paoletti, S
Paolucci, P
Park, HK
Pascale, G
Passaleva, G
Patricelli, S
Paul, T
Pauluzzi, M
Paus, C
Pauss, F
Pei, YJ
Pensotti, S
PerretGallix, D
Petrak, S
Pevsner, A
Piccolo, D
Pieri, M
Pinto, JC
Piroue, PA
Pistolesi, E
Plyaskin, V
Pohl, M
Pojidaev, V
Postema, H
Produit, N
Raghavan, R
RahalCallot, G
Rancoita, PG
Rattaggi, M
Raven, G
Razis, P
Read, K
Redaelli, M
Den, D
Rescigno, M
Reucroft, S
Ricker, A
Riemann, S
Riemers, BC
Riles, K
Rind, O
Ro, S
Robohm, S
Rodin, J
Rodriguez, FJ
Roe, BP
Rohner, S
Romero, L
RosierLees, S
Rosselet, P
vanRossum, W
Roth, S
Rubio, JA
Rykaczewski, H
Salicio, J
Salicio, JM
Sanchez, E
Santocchia, A
Sarakinos, ME
Sarkar, S
Sassowsky, M
Schafer, C
Schegelsky, V
SchmidtKaerst, S
Schmitz, D
Schmitz, P
Schneegans, M
Schoeneich, B
Scholz, N
Schopper, H
Schotanus, DJ
Schulte, R
Schultze, K
Schwenke, J
Schwering, G
Sciacca, C
Seiler, PG
Sens, JC
Servoli, L
Shevchenko, S
Shivarov, N
Shoutko, V
Shukla, J
Shumilov, E
Siedenburg, T
Son, D
Sopczak, A
Soulimov, V
Smith, B
Spillantini, P
Steuer, M
Stickland, DP
Sticozzi, F
Stone, H
Stoyanov, B
Straessner, A
Strauch, K
Sudhakar, K
Sultanov, G
Sun, LZ
Susinno, GF
Suter, H
Swain, JD
Tang, XW
Tauscher, L
Taylor, L
Ting, SCC
Ting, SM
Toker, O
Tonisch, F
Tonutti, M
Tonwar, SC
Toth, J
Tsaregorodtsev, A
Tully, C
Tuchscherer, H
Tung, KL
Ulbricht, J
Urban, L
Uwer, U
Valente, E
VandeWalle, RT
Vetlitsky, I
Viertel, G
Vivargent, M
Volkert, R
Vogel, H
Vogt, H
Vorobiev, I
Vorobyov, AA
Vorobyov, AA
Vuilleumier, L
Wadhwa, M
Wallraff, W
Wang, JC
Wang, XL
Wang, YF
Wang, ZM
Weber, A
Weill, R
Willmott, C
Wittgenstein, F
Wu, SX
Wynhoff, S
Xu, J
Xu, ZZ
Yang, BZ
Yang, CG
Yao, XY
Ye, JB
Yeh, SC
You, JM
Zaccardelli, C
Zalite, A
Zemp, P
Zeng, JY
Zeng, Y
Zhang, Z
Zhang, ZP
Zhou, B
Zhou, GJ
Zhou, Y
Zhu, GY
Zhu, RY
Zichichi, A
vanderZwaan, BCC
TI Study of the structure of hadronic events and determination of alpha(s)
at root s=130 GeV and 136 GeV
SO PHYSICS LETTERS B
LA English
DT Article
ID CHARGED-PARTICLE MULTIPLICITIES; LUND MONTE-CARLO; E+E-ANNIHILATION; JET
FRAGMENTATION; PETRA ENERGIES; L3 EXPERIMENT; QCD MODELS; DECAYS; Z0;
DISTRIBUTIONS
AB We present a study of the structure of hadronic events recorded by the L3 detector at center-of-mass energies of 130 and 136 GeV. The data sample corresponds to an integrated luminosity of 5 pb(-1) collected during the high energy run of 1995. The shapes of the event shape distributions and the energy dependence of their mean values are well reproduced by QCD models. From a comparison of the data with resummed O(alpha(s)(2)) QCD calculations, we determine the strong coupling constant to be alpha(s)(133 GeV) = 0.107 +/- 0.005(exp) +/- 0.006(theor).
C1 RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY.
NIKHEF H, NATL HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS.
UNIV AMSTERDAM, 1009 DB AMSTERDAM, NETHERLANDS.
UNIV MICHIGAN, ANN ARBOR, MI 48109 USA.
LAB ANNECY LE VIEUX PHYS PARTICULES, IN2P3, CNRS, F-74941 ANNECY LE VIEUX, FRANCE.
JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA.
UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND.
LOUISIANA STATE UNIV, BATON ROUGE, LA 70803 USA.
INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA.
HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY.
IST NAZL FIS NUCL, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY.
TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA.
BOSTON UNIV, BOSTON, MA 02215 USA.
NORTHEASTERN UNIV, BOSTON, MA 02115 USA.
INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA.
UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA.
HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST, HUNGARY.
HARVARD UNIV, CAMBRIDGE, MA 02139 USA.
MIT, CAMBRIDGE, MA 02139 USA.
UNIV FLORENCE, I-50125 FLORENCE, ITALY.
IST NAZL FIS NUCL, SEZ FIRENZE, I-50125 FLORENCE, ITALY.
CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND.
WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND.
UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND.
CHINESE UNIV SCI & TECHNOL, USTC, HEFEI 230029, ANHUI, PEOPLES R CHINA.
RES INST HIGH ENERGY PHYS, SEFT, SF-00014 HELSINKI, FINLAND.
UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND.
IST NAZL FIS NUCL, I-73100 LECCE, ITALY.
UNIV LECCE, I-73100 LECCE, ITALY.
LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA.
UNIV LYON 1, CNRS, IN2P3, INST PHYS NUCL LYON, F-69622 PARIS, FRANCE.
CIEMAT, E-28040 MADRID, SPAIN.
IST NAZL FIS NUCL, SEZ MILANO, I-20133 MILAN, ITALY.
INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA.
IST NAZL FIS NUCL, I-80125 NAPLES, ITALY.
UNIV NAPLES, I-80125 NAPLES, ITALY.
UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS.
UNIV NYMEGEN, 6525 ED NIJMEGEN, NETHERLANDS.
NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS.
OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA.
CALTECH, PASADENA, CA 91125 USA.
IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY.
UNIV PERUGIA, I-06100 PERUGIA, ITALY.
CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA.
PRINCETON UNIV, PRINCETON, NJ 08544 USA.
IST NAZL FIS NUCL, I-00185 ROME, ITALY.
UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY.
INST PHYS NUCL, ST PETERSBURG, RUSSIA.
UNIV SALERNO, I-84100 SALERNO, ITALY.
IST NAZL FIS NUCL, I-84100 SALERNO, ITALY.
UNIV CALIF SAN DIEGO, SAN DIEGO, CA 92093 USA.
UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN.
BULGARIAN ACAD SCI, CENT LAB MECHATRON & INSTRUMENTAT, BU-1113 SOFIA, BULGARIA.
KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA.
UNIV ALABAMA, TUSCALOOSA, AL 35486 USA.
UNIV UTRECHT, 3584 CB UTRECHT, NETHERLANDS.
NIKHEF H, 3584 CB UTRECHT, NETHERLANDS.
PURDUE UNIV, W LAFAYETTE, IN 47907 USA.
PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND.
DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY.
ETH ZURICH, CH-8093 ZURICH, SWITZERLAND.
UNIV HAMBURG, D-22761 HAMBURG, GERMANY.
RP RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY.
RI Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015; van der
Zwaan, Bob/F-4070-2015; D'Alessandro, Raffaello/F-5897-2015; Sanchez,
Eusebio/H-5228-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge,
francisco javier/H-9682-2015; Rancoita, Pier Giorgio/J-9896-2015;
Hoorani, Hafeez/D-1791-2013; Roth, Stefan/J-2757-2016; Kamyshkov,
Yuri/J-7999-2016; Ludovici, Lucio/F-5917-2011; Kirkby,
Jasper/A-4973-2012; Servoli, Leonello/E-6766-2012; alpat, ali
behcet/G-6290-2013; bertucci, bruna/J-5237-2012; Cavallo,
Nicola/F-8913-2012; Cerrada, Marcos/J-6934-2014; de la Cruz,
Begona/K-7552-2014; Josa, Isabel/K-5184-2014; Gonzalez Romero,
Enrique/L-7561-2014; Vogel, Helmut/N-8882-2014; Fiandrini,
Emanuele/C-4549-2008; Lista, Luca/C-5719-2008
OI Ferguson, Thomas/0000-0001-5822-3731; Berdugo,
Javier/0000-0002-7911-8532; van der Zwaan, Bob/0000-0001-5871-7643;
D'Alessandro, Raffaello/0000-0001-7997-0306; Sanchez,
Eusebio/0000-0002-9646-8198; Rancoita, Pier Giorgio/0000-0002-1990-4283;
Roth, Stefan/0000-0003-3616-2223; Kamyshkov, Yuri/0000-0002-3789-7152;
Ludovici, Lucio/0000-0003-1970-9960; Kirkby, Jasper/0000-0003-2341-9069;
Servoli, Leonello/0000-0003-1725-9185; alpat, ali
behcet/0000-0002-0116-1506; Cerrada, Marcos/0000-0003-0112-1691;
Gonzalez Romero, Enrique/0000-0003-2376-8920; Vogel,
Helmut/0000-0002-6109-3023;
NR 63
TC 61
Z9 61
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 21
PY 1996
VL 371
IS 1-2
BP 137
EP 148
DI 10.1016/0370-2693(96)00096-2
PG 12
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UB860
UT WOS:A1996UB86000022
ER
PT J
AU Abe, K
Abt, I
Ahn, CJ
Akagi, T
Allen, NJ
Ash, WW
Aston, D
Baird, KG
Baltay, C
Band, HR
Barakat, MB
Baranko, G
Bardon, O
Barklow, T
Bazarko, AO
BenDavid, R
Benvenuti, AC
Bilei, GM
Bisello, D
Blaylock, G
Bogart, JR
Bolton, T
Bower, GR
Brau, JE
Breidenbach, M
Bugg, WM
Burke, D
Burnett, TH
Burrows, PN
Busza, W
Calcaterra, A
Caldwell, DO
Calloway, D
Camanzi, B
Carpinelli, M
Cassell, R
Castaldi, R
Castro, A
CavalliSforza, M
Chou, A
Church, E
Cohn, HO
Coller, JA
Cook, V
Cotton, R
Cowan, RF
Coyne, DG
Crawford, G
DOliveira, A
Damerell, CJS
Daoudi, M
DeSangro, R
DeSimone, P
DellOrso, R
Dima, M
Du, PYC
Dubois, R
Eisenstein, BI
Elia, R
Etzion, E
Falciai, D
Fan, C
Fero, MJ
Frey, R
Furuno, K
Gillman, T
Gladding, G
Gonzalez, S
Hallewell, GD
Hart, EL
Hasan, A
Hasegawa, Y
Hasuko, K
Hedges, S
Hertzbach, SS
Hildreth, MD
Huber, J
Huffer, ME
Hughes, EW
Hwang, H
Iwasaki, Y
Jackson, DJ
Jacques, P
Jaros, J
Johnson, AS
Johnson, JR
Johnson, RA
Junk, T
Kajikawa, R
Kalelkar, M
Kang, HJ
Karliner, I
Kawahara, H
Kendall, HW
Kim, Y
King, ME
King, R
Kofler, RR
Krishna, NM
Kroeger, RS
Labs, JF
Langston, M
Lath, A
Lauber, JA
Leith, DWGS
Liu, MX
Liu, X
Loreti, M
Lu, A
Lynch, HL
Ma, J
Mancinelli, G
Manly, S
Mantovani, G
Markiewicz, TW
Maruyama, T
Massetti, R
Masuda, H
Mazzucato, E
McKemey, AK
Meadows, BT
Messner, R
Mockett, PM
Moffeit, KC
Mours, B
Muller, D
Nagamine, T
Narita, S
Nauenberg, U
Neal, H
Nussbaum, M
Ohnishi, Y
Osborne, LS
Panvini, RS
Park, H
Pavel, TJ
Peruzzi, I
Piccolo, M
Piemontese, L
Pieroni, E
Pitts, KT
Plano, RJ
Prepost, R
Prescott, CY
Punkar, GD
Quigley, J
Ratcliff, BN
Reeves, TW
Reidy, J
Rensing, PE
Rochester, LS
Rowson, PC
Russell, JJ
Saxton, OH
Schaffner, SF
Schalk, T
Schindler, RH
Schumm, BA
Seiden, A
Sen, S
Serbo, VV
Shaevitz, MH
Shank, JT
Shapiro, G
Shapiro, SL
Sherden, DJ
Shmakov, KD
Simopoulos, C
Sinev, NB
Smith, SR
Snyder, JA
Stamer, P
Steiner, H
Steiner, R
Strauss, MG
Su, D
Suekane, F
Sugiyama, A
Suzuki, S
Swartz, M
Szumilo, A
Takahashi, T
Taylor, FE
Torrence, E
Trandafir, AI
Turk, JD
Usher, T
Vavra, J
Vannini, C
Vella, E
Venuti, JP
Verdier, R
Verdini, PG
Wagner, SR
Waite, AP
Watts, SJ
Weidemann, AW
Weiss, ER
Whitaker, JS
White, SL
Wickens, FJ
Williams, DA
Williams, DC
Williams, SH
Willocq, S
Wilson, RJ
Wisniewski, WJ
Woods, M
Word, GB
Wyss, J
Yamamoto, RK
Yamartino, JM
Yang, X
Yellin, SJ
Young, CC
Yuta, H
Zapalac, G
Zdarko, RW
Zeitlin, C
Zhang, Z
Zhou, J
AF Abe, K
Abt, I
Ahn, CJ
Akagi, T
Allen, NJ
Ash, WW
Aston, D
Baird, KG
Baltay, C
Band, HR
Barakat, MB
Baranko, G
Bardon, O
Barklow, T
Bazarko, AO
BenDavid, R
Benvenuti, AC
Bilei, GM
Bisello, D
Blaylock, G
Bogart, JR
Bolton, T
Bower, GR
Brau, JE
Breidenbach, M
Bugg, WM
Burke, D
Burnett, TH
Burrows, PN
Busza, W
Calcaterra, A
Caldwell, DO
Calloway, D
Camanzi, B
Carpinelli, M
Cassell, R
Castaldi, R
Castro, A
CavalliSforza, M
Chou, A
Church, E
Cohn, HO
Coller, JA
Cook, V
Cotton, R
Cowan, RF
Coyne, DG
Crawford, G
DOliveira, A
Damerell, CJS
Daoudi, M
DeSangro, R
DeSimone, P
DellOrso, R
Dima, M
Du, PYC
Dubois, R
Eisenstein, BI
Elia, R
Etzion, E
Falciai, D
Fan, C
Fero, MJ
Frey, R
Furuno, K
Gillman, T
Gladding, G
Gonzalez, S
Hallewell, GD
Hart, EL
Hasan, A
Hasegawa, Y
Hasuko, K
Hedges, S
Hertzbach, SS
Hildreth, MD
Huber, J
Huffer, ME
Hughes, EW
Hwang, H
Iwasaki, Y
Jackson, DJ
Jacques, P
Jaros, J
Johnson, AS
Johnson, JR
Johnson, RA
Junk, T
Kajikawa, R
Kalelkar, M
Kang, HJ
Karliner, I
Kawahara, H
Kendall, HW
Kim, Y
King, ME
King, R
Kofler, RR
Krishna, NM
Kroeger, RS
Labs, JF
Langston, M
Lath, A
Lauber, JA
Leith, DWGS
Liu, MX
Liu, X
Loreti, M
Lu, A
Lynch, HL
Ma, J
Mancinelli, G
Manly, S
Mantovani, G
Markiewicz, TW
Maruyama, T
Massetti, R
Masuda, H
Mazzucato, E
McKemey, AK
Meadows, BT
Messner, R
Mockett, PM
Moffeit, KC
Mours, B
Muller, D
Nagamine, T
Narita, S
Nauenberg, U
Neal, H
Nussbaum, M
Ohnishi, Y
Osborne, LS
Panvini, RS
Park, H
Pavel, TJ
Peruzzi, I
Piccolo, M
Piemontese, L
Pieroni, E
Pitts, KT
Plano, RJ
Prepost, R
Prescott, CY
Punkar, GD
Quigley, J
Ratcliff, BN
Reeves, TW
Reidy, J
Rensing, PE
Rochester, LS
Rowson, PC
Russell, JJ
Saxton, OH
Schaffner, SF
Schalk, T
Schindler, RH
Schumm, BA
Seiden, A
Sen, S
Serbo, VV
Shaevitz, MH
Shank, JT
Shapiro, G
Shapiro, SL
Sherden, DJ
Shmakov, KD
Simopoulos, C
Sinev, NB
Smith, SR
Snyder, JA
Stamer, P
Steiner, H
Steiner, R
Strauss, MG
Su, D
Suekane, F
Sugiyama, A
Suzuki, S
Swartz, M
Szumilo, A
Takahashi, T
Taylor, FE
Torrence, E
Trandafir, AI
Turk, JD
Usher, T
Vavra, J
Vannini, C
Vella, E
Venuti, JP
Verdier, R
Verdini, PG
Wagner, SR
Waite, AP
Watts, SJ
Weidemann, AW
Weiss, ER
Whitaker, JS
White, SL
Wickens, FJ
Williams, DA
Williams, DC
Williams, SH
Willocq, S
Wilson, RJ
Wisniewski, WJ
Woods, M
Word, GB
Wyss, J
Yamamoto, RK
Yamartino, JM
Yang, X
Yellin, SJ
Young, CC
Yuta, H
Zapalac, G
Zdarko, RW
Zeitlin, C
Zhang, Z
Zhou, J
TI Factorial and cumulant moments in e(+)e(-)->hadrons at the Z(0)
resonance
SO PHYSICS LETTERS B
LA English
DT Article
ID MULTIPLICITY DISTRIBUTIONS; HADRON-COLLISIONS; JETS
AB We present the first experimental study of the ratio of cumulant to factorial moments of the charged-particle multiplicity distribution in high-energy particle interactions, using hadronic Z(0) decays collected by the SLD experiment at SLAG. We find that this ratio, as a function of the moment-rank q, decreases sharply to a negative minimum at q = 5, which is followed by quasi-oscillations. These features are insensitive to experimental systematic effects and are in qualitative agreement with expectations from next-to-next-to-leading-order perturbative QCD.
C1 IST NAZL FIS NUCL, SEZ BOLOGNA, I-40126 BOLOGNA, ITALY.
BOSTON UNIV, BOSTON, MA 02215 USA.
BRUNEL UNIV, UXBRIDGE UB8 3PH, MIDDX, ENGLAND.
CALTECH, PASADENA, CA 91125 USA.
UNIV CALIF SANTA BARBARA, SANTA BARBARA, CA 93106 USA.
UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA.
UNIV CINCINNATI, CINCINNATI, OH 45221 USA.
COLORADO STATE UNIV, FT COLLINS, CO 80523 USA.
UNIV COLORADO, BOULDER, CO 80309 USA.
COLUMBIA UNIV, NEW YORK, NY 10027 USA.
IST NAZL FIS NUCL, SEZ FERRARA, I-44100 FERRARA, ITALY.
UNIV FERRARA, I-44100 FERRARA, ITALY.
IST NAZL FIS NUCL, NAZL FRASCATI LAB, I-00044 FRASCATI, ITALY.
UNIV ILLINOIS, URBANA, IL 61801 USA.
UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA.
MIT, CAMBRIDGE, MA 02139 USA.
UNIV MASSACHUSETTS, AMHERST, MA 01003 USA.
UNIV MISSISSIPPI, UNIVERSITY, MS 38677 USA.
NAGOYA UNIV, CHIKUSA KU, NAGOYA, AICHI 464, JAPAN.
UNIV OREGON, EUGENE, OR 97403 USA.
UNIV PADUA, I-35100 PADUA, ITALY.
IST NAZL FIS NUCL, SEZ PADOVA, I-35100 PADUA, ITALY.
UNIV PERUGIA, I-06100 PERUGIA, ITALY.
IST NAZL FIS NUCL, SEZ PERUGIA, I-06100 PERUGIA, ITALY.
UNIV PISA, I-56100 PISA, ITALY.
IST NAZL FIS NUCL, SEZ PISA, I-56100 PISA, ITALY.
RUTGERS STATE UNIV, PISCATAWAY, NJ 08855 USA.
RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND.
SOGANG UNIV, SEOUL, SOUTH KOREA.
STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA.
UNIV TENNESSEE, KNOXVILLE, TN 37996 USA.
TOHOKU UNIV, SENDAI, MIYAGI 980, JAPAN.
VANDERBILT UNIV, NASHVILLE, TN 37235 USA.
UNIV WASHINGTON, SEATTLE, WA 98195 USA.
UNIV WISCONSIN, MADISON, WI 53706 USA.
YALE UNIV, NEW HAVEN, CT 06511 USA.
RP ADELPHI UNIV, GARDEN CITY, NY 11530 USA.
RI Schaffner, Stephen/D-1189-2011; de Sangro, Riccardo/J-2901-2012;
Cavalli-Sforza, Matteo/H-7102-2015; Frey, Raymond/E-2830-2016;
Calcaterra, Alessandro/P-5260-2015;
OI de Sangro, Riccardo/0000-0002-3808-5455; Frey,
Raymond/0000-0003-0341-2636; Calcaterra, Alessandro/0000-0003-2670-4826;
pieroni, enrico/0000-0002-4246-6963; Wyss, Jeffery/0000-0002-8277-4012;
Wilson, Robert/0000-0002-8184-4103
NR 26
TC 36
Z9 36
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 21
PY 1996
VL 371
IS 1-2
BP 149
EP 156
DI 10.1016/0370-2693(96)00046-9
PG 8
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UB860
UT WOS:A1996UB86000023
ER
PT J
AU Aitala, EM
Amato, S
Anjos, JC
Appel, JA
Ashery, D
Banerjee, S
Bediaga, I
Blaylock, G
Bracker, SB
Burchat, PR
Burnstein, RA
Carter, T
Carvalho, HS
Costa, I
Cremaldi, LM
Darling, C
Denisenko, K
Fernandez, A
Gagnon, P
Gerzon, S
Gobel, C
Gounder, K
Granite, D
Halling, AM
Herrera, G
Hurvits, G
James, C
Kasper, PA
Kondakis, N
Kwan, S
Langs, DC
Leslie, J
Lichtenstadt, J
Lundberg, B
Manacero, A
MayTalBeck, S
Meadows, B
deMello, JRT
Milburn, RH
deMiranda, JM
Napier, A
Nguyen, A
dOliveira, AB
OShaugnessy, K
Peng, KC
Perera, LP
Purohit, MV
Quinn, B
Radeztsky, S
Rafatian, A
Reay, NW
Reidy, JJ
Reis, AC
Rubin, HA
Santha, AKS
Santoro, AFS
Schwartz, AJ
Sheaff, M
Sidwell, RA
Slaughter, AJ
Smith, JG
Sokoloff, MD
Stanton, NR
Sugano, K
Summers, DJ
Takach, S
Thorne, K
Tripathi, AK
Watanabe, S
WeissBabai, R
Wiener, J
Witchey, N
Wolin, E
Yi, D
Zaliznyak, R
Zhang, C
AF Aitala, EM
Amato, S
Anjos, JC
Appel, JA
Ashery, D
Banerjee, S
Bediaga, I
Blaylock, G
Bracker, SB
Burchat, PR
Burnstein, RA
Carter, T
Carvalho, HS
Costa, I
Cremaldi, LM
Darling, C
Denisenko, K
Fernandez, A
Gagnon, P
Gerzon, S
Gobel, C
Gounder, K
Granite, D
Halling, AM
Herrera, G
Hurvits, G
James, C
Kasper, PA
Kondakis, N
Kwan, S
Langs, DC
Leslie, J
Lichtenstadt, J
Lundberg, B
Manacero, A
MayTalBeck, S
Meadows, B
deMello, JRT
Milburn, RH
deMiranda, JM
Napier, A
Nguyen, A
dOliveira, AB
OShaugnessy, K
Peng, KC
Perera, LP
Purohit, MV
Quinn, B
Radeztsky, S
Rafatian, A
Reay, NW
Reidy, JJ
Reis, AC
Rubin, HA
Santha, AKS
Santoro, AFS
Schwartz, AJ
Sheaff, M
Sidwell, RA
Slaughter, AJ
Smith, JG
Sokoloff, MD
Stanton, NR
Sugano, K
Summers, DJ
Takach, S
Thorne, K
Tripathi, AK
Watanabe, S
WeissBabai, R
Wiener, J
Witchey, N
Wolin, E
Yi, D
Zaliznyak, R
Zhang, C
TI Asymmetries between the production of D+ and D- mesons from 500 GeV/c
pi(-)-nucleus interactions as a function of x(F) and p(t)(2)
SO PHYSICS LETTERS B
LA English
DT Article
ID COLLISIONS
AB We present asymmetries between the production of D+ and D- mesons in Fermilab experiment E791 as a function of x(F) and p(t)(2). The data used here consist of 74000 fully-reconstructed charmed mesons produced by a 500 GeV/c pi(-) beam on C and Pt foils. The measurements are compared to results of models which predict differences between the production of heavy-quark mesons that have a light quark in common with the beam (leading particles) and those that do not (non-leading particles). While the default models do not agree with our data, we can reach agreement with one of them, PYTHIA, by making a limited number of changes to parameters used.
C1 UNIV CINCINNATI,CINCINNATI,OH 45221.
CINVESTAV IPN,MEXICO CITY,DF,MEXICO.
FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510.
IIT,CHICAGO,IL 60616.
KANSAS STATE UNIV,MANHATTAN,KS 66506.
UNIV MISSISSIPPI,UNIVERSITY,MS 38677.
OHIO STATE UNIV,COLUMBUS,OH 43210.
PRINCETON UNIV,PRINCETON,NJ 08544.
UNIV AUTONOMA PUEBLA,PUEBLA 72570,MEXICO.
UNIV S CAROLINA,COLUMBIA,SC 29208.
STANFORD UNIV,STANFORD,CA 94305.
TEL AVIV UNIV,IL-69978 TEL AVIV,ISRAEL.
TUFTS UNIV,MEDFORD,MA 02155.
UNIV WISCONSIN,MADISON,WI 53706.
YALE UNIV,NEW HAVEN,CT 06511.
CTR BRASILEIRO PESQUISAS FIS,RIO JANEIRO,BRAZIL.
CTR BRASILEIRO PESQUISAS FIS,RIO JANEIRO,BRAZIL.
UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064.
RP Aitala, EM (reprint author), UNIV MISSISSIPPI,UNIVERSITY,MS 38677, USA.
RI Manacero, Aleardo/D-3941-2012; Anjos, Joao/C-8335-2013; de Mello Neto,
Joao/C-5822-2013; Gobel Burlamaqui de Mello, Carla /H-4721-2016
OI Manacero, Aleardo/0000-0002-4581-7482; de Mello Neto,
Joao/0000-0002-3234-6634; Gobel Burlamaqui de Mello, Carla
/0000-0003-0523-495X
NR 20
TC 99
Z9 99
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 21
PY 1996
VL 371
IS 1-2
BP 157
EP 162
DI 10.1016/0370-2693(96)00093-7
PG 6
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UB860
UT WOS:A1996UB86000024
ER
PT J
AU Kolb, EW
Tkachev, II
AF Kolb, EW
Tkachev, II
TI Femtolensing and picolensing by axion miniclusters
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE dark matter; elementary particles; gravitational lensing
ID INVISIBLE AXION; PARTICLE; INSTANTONS; STRINGS; OBJECTS; DENSITY;
SN1987A; BOUNDS; STARS; MASS
AB Nonlinear effects in the evolution of the axion field in the early universe may lead to the formation of gravitationally bound clumps of axions, known as ''miniclusters.'' Minicluster masses and radii should be in the range M(mc) similar to 10(-12) M. and R(mc) similar to 10(10) cm, and in plausible early-universe scenarios a significant fraction of the mass density of the universe may be in the form of axion miniclusters. If such axion miniclusters exist, they would have the physical properties required to be detected by ''femtolensing.''
C1 UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637.
OHIO STATE UNIV,DEPT PHYS,COLUMBUS,OH 43210.
RUSSIAN ACAD SCI,INST NUCL RES,MOSCOW 117901,RUSSIA.
RP Kolb, EW (reprint author), NASA,FERMILAB ASTROPHYS CTR,FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510, USA.
NR 35
TC 45
Z9 45
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD MAR 20
PY 1996
VL 460
IS 1
BP L25
EP &
PN 2
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA TZ367
UT WOS:A1996TZ36700006
ER
PT J
AU Li, H
Kusunose, M
Liang, EP
AF Li, H
Kusunose, M
Liang, EP
TI Gamma rays from galactic black hole candidates with stochastic particle
acceleration
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; black hole physics; gamma rays, observations;
gamma rays, theory; radiation mechanisms, nonthermal; radiation
mechanisms, thermal
ID PAIR PRODUCTION; PLASMAS; CYGNUS-X-1; SCATTERING; SPECTRA
AB We consider stochastic particle acceleration in plasmas around stellar mass black holes to explain the emissions above 1 MeV from Galactic black hole candidates. We show that for certain parameter regimes, electrons can overcome Coulomb losses and be accelerated beyond the thermal distribution to form a new population, the distribution of which is broad and is usually not a power law; the peak energy of the distribution is determined by the balance between acceleration and cooling, with particles piling up around it. Radiation by inverse-Compton scattering off the thermal (from background) and nonthermal (produced by acceleration) particles can in principle explain the hard X-ray to gamma-ray emissions from black hole candidates. We present model fits of Cyg X-1 and GRO J0422 in the 50 keV-5 MeV region observed with OSSE and COMPTEL.
C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
UNIV TEXAS,DEPT ASTRON,AUSTIN,TX 78712.
RP Li, H (reprint author), RICE UNIV,DEPT SPACE PHYS & ASTRON,HOUSTON,TX 77251, USA.
NR 34
TC 23
Z9 23
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 5720 S WOODLAWN AVE, CHICAGO, IL 60637
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD MAR 20
PY 1996
VL 460
IS 1
BP L29
EP L32
PN 2
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA TZ367
UT WOS:A1996TZ36700007
ER
PT J
AU Gasteiger, HA
Markovic, NM
Ross, PN
AF Gasteiger, HA
Markovic, NM
Ross, PN
TI Bromide adsorption on Pt(111): Adsorption isotherm and electrosorption
valency deduced from RRD(Pt(111))E measurements
SO LANGMUIR
LA English
DT Letter
ID SURFACE; PLATINUM; ELECTROCHEMISTRY; SPECTROSCOPY; MOLECULES; HALIDES;
COPPER; LEED; PH
AB The rotating ring-disk electrode technique with a Pt(111) single crystal in the disk position is used to establish, for the first time, both the bromide adsorption isotherm and its electrosorption valency on Pt(111). In 0.1 M HClO4 with approximate to 10(-4) M Br-, bromide adsorption begins at ca. -0.15 V (SCE) and reaches a coverage of approximate to 0.42 ML at 0.5 V; the electrosorption valency is essentially unity. By subtracting the bromide flux from the Pt(111)-disk current, we were able to deconvolute hydrogen adsorption/desorption processes in the presence of bromide. The major peak in the voltammetry at ca. -0.1 V is the simultaneous desorption/adsorption of hydrogen and adsorption/desorption of bromide. Furthermore, we demonstrated that the saturation coverage of adsorbed hydrogen on Pt(111) is approximate to 160 mu C/cm(2).
C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV SCI MAT, BERKELEY, CA 94720 USA.
NR 32
TC 42
Z9 42
U1 0
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD MAR 20
PY 1996
VL 12
IS 6
BP 1414
EP 1418
DI 10.1021/la950826s
PG 5
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA UB634
UT WOS:A1996UB63400003
ER
PT J
AU Dees, C
Godfrey, VL
Schultz, RD
Travis, CC
AF Dees, C
Godfrey, VL
Schultz, RD
Travis, CC
TI Wild type p53 reduces the size of tumors caused by bovine leukemia
virus-infected cells
SO CANCER LETTERS
LA English
DT Article
DE p53; BLV; treatment; transfection
AB Bat lung (BAT(2)CL6) cells infected with bovine leukemia virus (BLV) cause malignant tumors in nude mice that after 6 weeks subcutaneous growth, have an average volume of 0.3 cm(3). Uninfected bat lung cells (To 1 Lu) produce small benign neoplasms that average 0.003 cm(3). BAT(2)CL6 cells were transfected in vitro with expression vectors that produce wild type human or mutant p53. Production of human p53 in transfected BAT(2)CL6 cells was confirmed by immunoprecipitation of p53 and by immunohistochemical staining using anti-human p53 monoclonal antibodies. BAT(2)CL6 cells transfected with wild type p53 produced tumors in nude mice averaging 0.03 cm(3) whereas cells transfected with mutant p53 yielded tumors averaging 0.3 cm(3). BAT(2)CL6 cell tumors after 1 week subcutaneous growth were transfected in situ with the wild type p53 gene. At 6 weeks tumor volume of in situ transfected tumors was similar to those resulting from cells transfected in vitro. Histopathologic examination and immunochemical staining of tumors produced in nude mice after wild type p53 treatment showed no significant differences when compared to tumors produced by untreated BAT(2)CL6 cells. Therefore, it is likely that the tumors produced by p53 treated-cells arose from cells that escaped transfection. The reduction of tumor size by restoration of wild type 53 may prove to be a useful therapy for BLV-induced tumors.
C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831.
UNIV WISCONSIN,SCH VET MED,DEPT PATHOBIOL,MADISON,WI 53706.
RP Dees, C (reprint author), OAK RIDGE NATL LAB,HLTH SCI RES DIV,RISK ANAL SECT,MOL TOXICOL GRP,POB 2008,BLDG 4500S,OAK RIDGE,TN 37831, USA.
NR 12
TC 2
Z9 3
U1 0
U2 0
PU ELSEVIER SCI IRELAND LTD
PI CLARE
PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE,
IRELAND
SN 0304-3835
J9 CANCER LETT
JI Cancer Lett.
PD MAR 19
PY 1996
VL 101
IS 1
BP 115
EP 122
DI 10.1016/0304-3835(96)04125-0
PG 8
WC Oncology
SC Oncology
GA TW797
UT WOS:A1996TW79700018
PM 8625274
ER
PT J
AU Brammer, L
Klooster, WT
Lemke, FR
AF Brammer, L
Klooster, WT
Lemke, FR
TI Neutron diffraction studies of [Cp(PMe(3))(2)RuH] and
[Cp(PMe(3))(2)RuH2]BF4 at 20 K
SO ORGANOMETALLICS
LA English
DT Article
ID X-RAY; DIHYDROGEN COMPLEXES; CYCLOPENTADIENYL-RUTHENIUM; COORDINATED
DIHYDROGEN; HYDRIDE COMPLEXES; METAL-HYDRIDES; ETA-2-DIHYDROGEN;
PROTONATION; CHEMISTRY; IRIDIUM
AB The crystal and molecular structures of [Cp(PMe(3))(2)RuH] (1) and [Cp(PMe(3))(2)RuH2]BF4 (2) have been determined from neutron diffraction measurements at 20 K. The Ru-H bond lengths in 1 (1.630(4) Angstrom) and 2 (1.599(8), 1.604(9) Angstrom) are the first terminal Ru-H distances to be determined by single-crystal neutron diffraction. The ''Cp'L(2)Ru'' system is now the first to have neutron diffraction studies of the monohydride, dihydride, and dihydrogen species. This is of particular importance in understanding the activation of H-2 by this metal-ligand fragment. Thus detailed comparisons with the recent structure determination by neutron diffraction of the dihydrogen complex [Cp*(dppm)Ru(eta(2)-H-2)]BF4 (dppm = bis(diphenylphosphino)methane) [Klooster, W. T.; Koetzle, T. F.; Jia, G.; Fong, T. P.; Morris, R. H.; Albinati, A. J. Am. Chem. Sec. 1994, 116, 7677-7681] are presented. A network of C-H ... F-BF3 hydrogen bonds links the anion and cation moieties in 2. The C(2)-H(2)... F(4) interaction has an H ... F separation of only 2.078(8) Angstrom, the shortest such interaction characterized to date by neutron diffraction. Ru-H stretching frequencies determined from the diffraction data are in good agreement with those from IR measurements.
C1 BROOKHAVEN NATL LAB,UPTON,NY 11973.
OHIO UNIV,ATHENS,OH 45701.
RP Brammer, L (reprint author), UNIV MISSOURI,DEPT CHEM,8001 NAT BRIDGE RD,ST LOUIS,MO 63121, USA.
NR 44
TC 52
Z9 52
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD MAR 19
PY 1996
VL 15
IS 6
BP 1721
EP 1727
DI 10.1021/om950952r
PG 7
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA UB307
UT WOS:A1996UB30700029
ER
PT J
AU Erdemir, A
Bindal, C
Fenske, GR
AF Erdemir, A
Bindal, C
Fenske, GR
TI Formation of ultralow friction surface films on boron carbide
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ACID-FORMING SURFACES; TRIBOLOGICAL PROPERTIES; SELF-LUBRICATION;
BORIC-ACID
AB In this letter, we describe the formation and ultralow friction mechanisms of a surface film on boron carbide (B4C). This film results from sequential reactions between B4C and oxygen and between the resulting boron oxide (B2O3) and moisture; it can afford friction coefficients of 0.03 to 0.05 to sliding steel surfaces. At temperatures above 600 degrees C, B4C undergoes oxidation and forms a layer of boron oxide (B2O3) in the upper surface. During cooling to room temperature, the B2O3 reacts with moisture in the air to form a secondary him, boric acid (H3BO3) The sliding friction coefficient of 440C steel balls against this film is 0.04, compared to 0.7 against the bare B4C surfaces. Mechanistically, we propose that the ultralow friction behavior of the heat-treated B4C surface is due mainly to the layered-crystal structure of the H3BO3 film that forms on the sliding surface. (C) 1996 American Institute of Physics.
C1 SAKARYA UNIV,DEPT MET ENGN,ADAPAZARI,TURKEY.
RP Erdemir, A (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439, USA.
NR 14
TC 70
Z9 76
U1 1
U2 14
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 18
PY 1996
VL 68
IS 12
BP 1637
EP 1639
DI 10.1063/1.115676
PG 3
WC Physics, Applied
SC Physics
GA UA597
UT WOS:A1996UA59700015
ER
PT J
AU Gruen, DM
Krauss, AR
Zuiker, CD
Csencsits, R
Terminello, LJ
Carlisle, JA
Jimenez, I
Sutherland, DGJ
Shuh, DK
Tong, W
Himpsel, FJ
AF Gruen, DM
Krauss, AR
Zuiker, CD
Csencsits, R
Terminello, LJ
Carlisle, JA
Jimenez, I
Sutherland, DGJ
Shuh, DK
Tong, W
Himpsel, FJ
TI Characterization of nanocrystalline diamond films by core-level
photoabsorption
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID CHEMICAL VAPOR-DEPOSITION; ABSORPTION FINE-STRUCTURE
AB Core-level photoabsorption has been used to determine the sp(2) and sp(3) bonding content of nanocrystalline diamond thin films grown using C-60 Or CH4 precursors. The C(ls) absorption spectra show clear bulk diamond excitonic and sp(3) features with little evidence of sp(2) bonding, while the Raman spectra measured from these same films are ambiguous and indeterminate. This result can be attributed to the local structure (near-neighbor bonding) sensitivity of core-level photoabsorption that is insensitive to domain size, unlike Raman spectroscopy. (C) 1996 American Institute of Physics.
C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439.
LAWRENCE LIVERMORE NATL LAB,DIV MAT SCI & TECHNOL,LIVERMORE,CA 94550.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720.
UNIV WISCONSIN,DEPT PHYS,MADISON,WI 53706.
RP Gruen, DM (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA.
RI Jimenez, Ignacio/F-7422-2010
OI Jimenez, Ignacio/0000-0001-5605-3185
NR 14
TC 106
Z9 111
U1 0
U2 9
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 18
PY 1996
VL 68
IS 12
BP 1640
EP 1642
DI 10.1063/1.115677
PG 3
WC Physics, Applied
SC Physics
GA UA597
UT WOS:A1996UA59700016
ER
PT J
AU Friedmann, TA
McCarty, KF
Barbour, JC
Siegal, MP
Dibble, DC
AF Friedmann, TA
McCarty, KF
Barbour, JC
Siegal, MP
Dibble, DC
TI Thermal stability of amorphous carbon films grown by pulsed laser
deposition
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID DIAMOND FILMS
AB The thermal stability in vacuum of amorphous tetrahedrally coordinated carbon (a-tC) films grown on Si has been assessed by in situ Raman spectroscopy. Films were grown in vacuum on room-temperature substrates using laser fluences of 12, 22, and 45 J/cm(2) and in a background gas of either hydrogen or nitrogen using a laser fluence of 45 J/cm(2). The films grown in vacuum at high fluence (>20J/cm(2)) show little change in the a-tC Raman spectra with temperature up to 800 degrees C. Above this temperature the films convert to glassy carbon (nanocrystalline graphite). Samples grown in vacuum at lower fluence or in a background gas (H-2 or N-2) at high fluence are not nearly as stable. For all samples, the Raman signal from the Si substrate (observed through the a-tC film) decreases in intensity with annealing temperature indicating that the transparency of the a-tC films is decreasing with temperature. These changes in transparency begin at much lower temperatures (similar to 200 degrees C) than the changes in the a-tC Raman band shape and indicate that subtle changes are occurring in the a-tC films at lower temperatures. (C) 1996 American Institute of Physics.
C1 SANDIA NATL LABS, LIVERMORE, CA 94551 USA.
RP SANDIA NATL LABS, POB 5800, ALBUQUERQUE, NM 87185 USA.
RI McCarty, Kevin/F-9368-2012
OI McCarty, Kevin/0000-0002-8601-079X
NR 14
TC 97
Z9 99
U1 4
U2 14
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0003-6951
EI 1077-3118
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 18
PY 1996
VL 68
IS 12
BP 1643
EP 1645
DI 10.1063/1.115891
PG 3
WC Physics, Applied
SC Physics
GA UA597
UT WOS:A1996UA59700017
ER
PT J
AU Findikoglu, AT
Jia, QX
Wu, XD
Chen, GJ
Venkatesan, T
Reagor, DW
AF Findikoglu, AT
Jia, QX
Wu, XD
Chen, GJ
Venkatesan, T
Reagor, DW
TI Tunable and adaptive bandpass filter using a nonlinear dielectric thin
film of SrTiO3
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB We have prepared an electrically tunable and adaptive 3-pole half-wave bandpass coplanar waveguide filter incorporating a 1.2-mu m-thick paraelectric SrTiO3 bottom layer and a 0.4-mu m-thick superconducting YBa2Cu3O7-x top electrode layer on a LaAlO3 substrate. By applying a separate bias voltage on each pole and also on each coupling capacitance of the device at 4 and 76 K, the filter response is not only fine tuned to achieve symmetric and optimized filter characteristics with less than 2% bandwidth centered around 2.5 GHz, but also broadband tuned to shift the passband by more than 15%. (C) 1996 American Institute of Physics.
C1 UNIV MARYLAND,CTR SUPERCONDUCT RES,COLLEGE PK,MD 20742.
RP Findikoglu, AT (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,SUPERCONDUCT TECHNOL CTR,LOS ALAMOS,NM 87545, USA.
RI Venkatesan, Thirumalai/E-1667-2013; Jia, Q. X./C-5194-2008
NR 6
TC 77
Z9 81
U1 0
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 18
PY 1996
VL 68
IS 12
BP 1651
EP 1653
DI 10.1063/1.115894
PG 3
WC Physics, Applied
SC Physics
GA UA597
UT WOS:A1996UA59700020
ER
PT J
AU Cooke, DW
Bennett, BL
Farnum, EH
Hults, WL
Sickafus, KE
Smith, JF
Smith, JL
Taylor, TN
Tiwari, P
Portis, AM
AF Cooke, DW
Bennett, BL
Farnum, EH
Hults, WL
Sickafus, KE
Smith, JF
Smith, JL
Taylor, TN
Tiwari, P
Portis, AM
TI SiOx luminescence from light-emitting porous silicon: Support for the
quantum confinement luminescence center model
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB Measurements of hydrogen loss and luminescence as a function of annealing temperature in porous silicon suggest that luminescence is attributable to electron-hole recombination in SiOx surface layers with an intensity that is dependent upon the surface hydrogen content. The luminescence is composed of three Gaussian bands similar to those found in amorphous SiO2. X-ray photoelectron spectroscopy and scanning electron microscopy show porous silicon has SiOx on the surface, which is comprised of many particles of about 10 nm size. Collectively, the data strongly support the previously proposed quantum confinement/luminescence center model. (C) 1996 American Institute of Physics.
C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720.
RP Cooke, DW (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA.
NR 19
TC 71
Z9 74
U1 1
U2 5
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 18
PY 1996
VL 68
IS 12
BP 1663
EP 1665
DI 10.1063/1.115898
PG 3
WC Physics, Applied
SC Physics
GA UA597
UT WOS:A1996UA59700024
ER
PT J
AU BourretCourchesne, ED
AF BourretCourchesne, ED
TI On the origin of stacking faults at the GaAs/ZnSe heterointerface
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ZNSE
AB A series of experiments was designed to assess the effects of the various stages of the nucleation process on the formation of stacking faults at the GaAs/ZnSe interface. Differential interference contrast microscopy was used to image stacking faults and misfit dislocations in 1000 Angstrom thick ZnSe layers. We have demonstrated that an As-stabilized GaAs surface is needed to obtain a low density of stacking faults. However, an excess of As favors the formation of stacking faults. More importantly, the introduction of Zn drastically increases the stacking fault density.
RP BourretCourchesne, ED (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,CTR ADV MAT 2200,BERKELEY,CA 94720, USA.
NR 12
TC 19
Z9 19
U1 0
U2 0
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 18
PY 1996
VL 68
IS 12
BP 1675
EP 1677
DI 10.1063/1.115902
PG 3
WC Physics, Applied
SC Physics
GA UA597
UT WOS:A1996UA59700028
ER
PT J
AU Warren, WL
AlShareef, HN
Dimos, D
Tuttle, BA
Pike, GE
AF Warren, WL
AlShareef, HN
Dimos, D
Tuttle, BA
Pike, GE
TI Driving force behind voltage shifts in ferroelectric materials
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID DOMAIN STABILIZATION; INTERNAL BIAS; DOPED BATIO3; CERAMICS
AB By systematically poling Pb(Zr,Ti)O-3 capacitors to different extents, we observe a linear relationship between the remanent polarization and the magnitude of voltage offsets in the hysteresis curve. This result directly shows that the polarization is the impetus behind voltage shifts and, thus, imprint in ferroelectric capacitors. It is proposed that the increased polarization lowers the electrostatic potential well for the trapping of electrons thereby leading to greater voltage shifts. We also find that the remanent polarization and defect occupancy are temperature dependent which collectively impact the observed voltage offsets measured at elevated temperature. (C) 1996 American Institute of Physics.
RP Warren, WL (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA.
RI Alshareef, Husam Niman/A-2000-2015
OI Alshareef, Husam Niman/0000-0001-5029-2142
NR 21
TC 67
Z9 68
U1 0
U2 17
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 18
PY 1996
VL 68
IS 12
BP 1681
EP 1683
DI 10.1063/1.115904
PG 3
WC Physics, Applied
SC Physics
GA UA597
UT WOS:A1996UA59700030
ER
PT J
AU Hofman, DJ
Back, BB
Paul, P
AF Hofman, DJ
Back, BB
Paul, P
TI Rapid increase in prescission GDR gamma-ray emission with energy
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT Groningen Conference on Giant Resonances
CY JUN 28-JUL 01, 1995
CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS
HO UNIV GRONINGEN
ID GIANT-DIPOLE RESONANCE; FUSION-FISSION; QUASI-FISSION; MODEL; THORIUM;
NUCLEI; DECAY
AB A rapid increase in the emission of prescission giant dipole resonance (GDR) gamma-rays with bombarding energy is observed in excited Th and Cf nuclei formed in the reactions O-16+Pb-208 and S-32+W-nat,Pb-208. This increase begins around E(exc) = 40 MeV for the O-16+Pb-208 reaction and E(exc) = 70 MeV for the S-32-induced reactions. The excess gamma-ray yield above these thresholds cannot be described within the standard statistical model. Statistical model calculations which include a temperature dependent nuclear dissipation are able to reproduce simultaneously the observed GDR gamma-ray spectra and recently measured evaporation residue cross sections.
C1 SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794.
RP Hofman, DJ (reprint author), ARGONNE NATL LAB,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 19
TC 7
Z9 7
U1 2
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAR 18
PY 1996
VL 599
IS 1-2
BP C23
EP C28
PG 6
WC Physics, Nuclear
SC Physics
GA UJ217
UT WOS:A1996UJ21700004
ER
PT J
AU Ormand, WE
Bortignon, PF
Broglia, RA
AF Ormand, WE
Bortignon, PF
Broglia, RA
TI The temperature dependence of the width of the giant-dipole resonance
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT Groningen Conference on Giant Resonances
CY JUN 28-JUL 01, 1995
CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS
HO UNIV GRONINGEN
ID HOT ROTATING NUCLEI; THERMAL FLUCTUATIONS; FINITE TEMPERATURE
AB The giant-dipole resonance (GDR) in Sn-120 and Pb-208 is studied as a function of excitation energy, angular momentum, and intrinsic width within the context of the adiabatic model. Theoretical evaluations of the full-width-at-half-maximum (FWHM) for the GDR strength function are compared with recent experimental data and are found to be in god agreement.
C1 OAK RIDGE NATL LAB,DIV PHYS,OAK RIDGE,TN 37831.
UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY.
IST NAZL FIS NUCL,SEZ MILANO,I-20133 MILAN,ITALY.
NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK.
RP Ormand, WE (reprint author), UNIV TENNESSEE,DEPT PHYS,401 NIELSEN HALL,KNOXVILLE,TN 37996, USA.
NR 28
TC 4
Z9 4
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAR 18
PY 1996
VL 599
IS 1-2
BP C57
EP C62
PG 6
WC Physics, Nuclear
SC Physics
GA UJ217
UT WOS:A1996UJ21700007
ER
PT J
AU Ramakrishnan, E
Baumann, T
Azhari, A
Kryger, RA
Pfaff, R
Thoennessen, M
Yokoyama, S
Beene, JR
Halbert, ML
Mueller, PE
Stracener, DW
Varner, RL
VanBuren, G
Charity, RJ
Dempsey, JF
Hua, PF
Sarantites, DG
Sobotka, LG
AF Ramakrishnan, E
Baumann, T
Azhari, A
Kryger, RA
Pfaff, R
Thoennessen, M
Yokoyama, S
Beene, JR
Halbert, ML
Mueller, PE
Stracener, DW
Varner, RL
VanBuren, G
Charity, RJ
Dempsey, JF
Hua, PF
Sarantites, DG
Sobotka, LG
TI Giant dipole resonance in excited Sn-120 and Pb-208 nuclei populated by
inelastic alpha scattering
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT Groningen Conference on Giant Resonances
CY JUN 28-JUL 01, 1995
CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS
HO UNIV GRONINGEN
ID LEVEL-DENSITY PARAMETER; EXCITATION-ENERGY
AB The evolution of the giant dipole resonance (GDR) in hob Sn-120 and Pb-208 nuclei was studied by measuring high energy gamma-rays from the decay of the resonance. The excited nuclei were populated by inelastic scattering of alpha-particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase systematically with excitation energy in both systems. Inelastic scattering populates low angular momentum states in the target. The observed width increase is thus attributed to fluctuations iii the nuclear shape induced by temperature.
C1 MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824.
OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130.
RP Ramakrishnan, E (reprint author), MICHIGAN STATE UNIV,NATL SUPERCONDUCTING CYCLOTRON LAB,E LANSING,MI 48824, USA.
NR 16
TC 7
Z9 7
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAR 18
PY 1996
VL 599
IS 1-2
BP C49
EP C55
PG 7
WC Physics, Nuclear
SC Physics
GA UJ217
UT WOS:A1996UJ21700006
ER
PT J
AU Ringbom, A
Tibell, G
Zorro, R
Blomgren, J
Conde, H
Elmgren, K
Hultqvist, S
Nilsson, J
Olsson, N
Fahlander, C
Nilsson, L
Nyberg, J
Reistad, D
Renberg, PU
Westerberg, L
Likar, A
Wender, S
AF Ringbom, A
Tibell, G
Zorro, R
Blomgren, J
Conde, H
Elmgren, K
Hultqvist, S
Nilsson, J
Olsson, N
Fahlander, C
Nilsson, L
Nyberg, J
Reistad, D
Renberg, PU
Westerberg, L
Likar, A
Wender, S
TI Studies of giant resonances by heavy ion scattering at a few hundred
MeV/nucleon
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT Groningen Conference on Giant Resonances
CY JUN 28-JUL 01, 1995
CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS
HO UNIV GRONINGEN
ID DIPOLE RESONANCE; EXCITATION; PB-208; DECAY
AB A technique to study giant resonances by heavy ion scattering in the energy range 100-470A MeV using one quadrant of the CELSIUS storage ring as a spectrometer is presented. A test experiment using 250A MeV O-16 on an Ar-40 target has been performed. The inelastically scattered particles could be separated from the background originating from the beam halo using a focal plane telescope in coincidence with neutron detectors around the target. The resolution of the excitation energy spectrum was 3.5 +/- 0.5 MeV, mainly determined by the beam size at the target.
C1 UNIV UPPSALA,DEPT NEUTRON RES,S-75121 UPPSALA,SWEDEN.
UNIV UPPSALA,SVEDBERG LAB,S-75121 UPPSALA,SWEDEN.
INST JOSEF STEFAN,LJUBLJANA,SLOVENIA.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87544.
RP Ringbom, A (reprint author), UNIV UPPSALA,DEPT RADIAT SCI,BOX 535,S-75121 UPPSALA,SWEDEN.
NR 7
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAR 18
PY 1996
VL 599
IS 1-2
BP C283
EP C288
PG 6
WC Physics, Nuclear
SC Physics
GA UJ217
UT WOS:A1996UJ21700031
ER
PT J
AU Schadmand, S
Varma, R
Banerjee, SR
Back, BB
Hofman, DJ
Montoya, CP
Paul, P
AF Schadmand, S
Varma, R
Banerjee, SR
Back, BB
Hofman, DJ
Montoya, CP
Paul, P
TI Internal pair decay of giant resonances in hot Pb-200
SO NUCLEAR PHYSICS A
LA English
DT Article; Proceedings Paper
CT Groningen Conference on Giant Resonances
CY JUN 28-JUL 01, 1995
CL UNIV GRONINGEN, GRONINGEN, NETHERLANDS
HO UNIV GRONINGEN
ID MONOPOLE
AB Electron-positron pairs emitted during the de-excitation of hot Pb-200 from the reaction 95 MeV F-19 + Ta-181 were detected with the Stony Brook pair detector. The internal pair decay from the giant dipole resonance (GDR) built on excited states in a heavy nucleus is cleanly observed for the first time. The results show that the GDR dominates the pair decay from a hot, heavy nucleus. Superior statistics is needed in order to extract weaker modes like the monopole or quadrupole giant resonances. Attempts to extract EO pair transitions by use of kinematic cuts and by dividing out the GDR pair strength are presented.
C1 KERNFYS VERSNELLER INST,9747 AA GRONINGEN,NETHERLANDS.
INDIAN INST TECHNOL,BOMBAY 400076,MAHARASHTRA,INDIA.
ARGONNE NATL LAB,ARGONNE,IL 60439.
RP Schadmand, S (reprint author), SUNY STONY BROOK,DEPT PHYS,STONY BROOK,NY 11794, USA.
NR 13
TC 7
Z9 7
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0375-9474
J9 NUCL PHYS A
JI Nucl. Phys. A
PD MAR 18
PY 1996
VL 599
IS 1-2
BP C89
EP C96
PG 8
WC Physics, Nuclear
SC Physics
GA UJ217
UT WOS:A1996UJ21700010
ER
PT J
AU Ooguri, H
Vafa, C
AF Ooguri, H
Vafa, C
TI Two-dimensional black hole and singularities of CY manifolds
SO NUCLEAR PHYSICS B
LA English
DT Article
DE theory of fundamental strings, properties of perturbation theory;
conformal field theory, algebraic structures; compactification and
four-dimensional models; noncritical string theory; extended classical
solutions, cosmic strings, domain walls, texture
ID CALABI-YAU MANIFOLDS; SUPERCONFORMAL FIELD-THEORIES; QUANTUM-GRAVITY;
SU(N) HOLONOMY; STRING THEORY; MATRIX MODEL; 2 DIMENSIONS; GEOMETRY;
VACUA; COMPACTIFICATION
AB We study the degenerating limits of superconformal theories for compactifications on singular K3 and Calabi-Yau threefolds. We find that in both cases the degeneration involves creating an Euclidean two-dimensional black hole coupled weakly to the rest of the system. Moreover we find that the conformal theory of A(n) singularities of K3 are the same as that of the symmetric fivebrane. We also find intriguing connections between ADE (1,n) non-critical strings and singular limits of superconformal theories on the corresponding ALE space.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720.
HARVARD UNIV,LYMAN LAB PHYS,CAMBRIDGE,MA 02138.
RP Ooguri, H (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,366 LE CONTE HALL,BERKELEY,CA 94720, USA.
RI Ooguri, Hirosi/A-4407-2011;
OI Ooguri, Hirosi/0000-0001-6021-3778
NR 63
TC 239
Z9 239
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAR 18
PY 1996
VL 463
IS 1
BP 55
EP 72
DI 10.1016/0550-3213(96)00008-9
PG 18
WC Physics, Particles & Fields
SC Physics
GA UE901
UT WOS:A1996UE90100003
ER
PT J
AU Abe, F
Akimoto, H
Akopian, A
Albrow, MG
Amendolia, SR
Amidei, D
Antos, J
AnwayWiese, C
Aota, S
Apollinari, G
Asakawa, T
Ashmanskas, W
Atac, M
Auchincloss, P
Azfar, F
AzziBacchetta, P
Bacchetta, N
Badgett, W
Bagdasarov, S
Bailey, MW
Bao, J
deBarbaro, P
BarbaroGaltieri, A
Barnes, VE
Barnett, BA
Bauer, G
Baumann, T
Bedeschi, F
Behrends, S
Belforte, S
Bellettini, G
Bellinger, J
Benjamin, D
Benlloch, J
Bensinger, J
Benton, D
Beretvas, A
Berge, JP
Berryhill, J
Bertolucci, S
Bhatti, A
Biery, K
Binkley, M
Bisello, D
Blair, RE
Blocker, C
Bodek, A
Bokhari, W
Bolognesi, V
Bortoletto, D
Boudreau, J
Breccia, L
Bromberg, C
BuckleyGeer, E
Budd, HS
Burkett, K
Busetto, G
ByonWagner, A
Byrum, KL
Cammerata, J
Campagnari, C
Campbell, M
Caner, A
Carithers, W
Carlsmith, D
Castro, A
Cauz, D
Cen, Y
Cervelli, F
Chao, HY
Chapman, J
Cheng, MT
Chiarelli, G
Chikamatsu, T
Chiou, CN
Christofek, L
Cihangir, S
Clark, AG
Cobal, M
Contreras, M
Conway, J
Cooper, J
Cordelli, M
Couyoumtzelis, C
Crane, D
CroninHennessy, D
Culbertson, R
Cunningham, JD
Daniels, T
DeJongh, F
Delchamps, S
DellAgnello, S
DellOrso, M
Demortier, L
Denby, B
Deninno, M
Derwent, PF
Devlin, T
Dickson, M
Dittmann, JR
Donati, S
Done, J
Dunn, A
Eddy, N
Einsweiler, K
Elias, JE
Ely, R
Engels, E
Errede, D
Errede, S
Fan, Q
Fiori, I
Flaugher, B
Foster, GW
Franklin, M
Frautschi, M
Freeman, J
Friedman, J
Frisch, H
Fuess, TA
Fukui, Y
Funaki, S
Gagliardi, G
Galeotti, S
Gallinaro, M
GarciaSciveres, M
Garfinkel, AF
Gay, C
Geer, S
Gerdes, DW
Giannetti, P
Giokaris, N
Giromini, P
Gladney, L
Glenzinski, D
Gold, M
Gonzalez, J
Gordon, A
Goshaw, AT
Goulianos, K
Grassmann, H
Groer, L
GrossoPilcher, C
Guillian, G
Guo, RS
Haber, C
Hafen, E
Hahn, SR
Hamilton, R
Handler, R
Hans, RM
Hara, K
Hardman, AD
Harral, B
Harris, RM
Hauger, SA
Hauser, J
Hawk, C
Hayashi, E
Heinrich, J
Hoffman, KD
Hohlmann, M
Holck, C
Hollebeek, R
Holloway, L
Holscher, A
Hong, S
Houk, G
Hu, P
Huffman, BT
Hughes, R
Huston, J
Huth, J
Hylen, J
Ikeda, H
Incagli, M
Incandela, J
Introzzi, G
Iwai, J
Iwata, Y
Jensen, H
Joshi, U
Kadel, RW
Kajfasz, E
Kamon, T
Kaneko, T
Karr, K
Kasha, H
Kato, Y
Keeble, L
Kelley, K
Kennedy, RD
Kephart, R
Kesten, P
Kestenbaum, D
Keup, RM
Keutelian, H
Keyvan, F
Kharadia, B
Kim, BJ
Kim, DH
Kim, HS
Kim, SB
Kim, SH
Kim, YK
Kirsch, L
Koehn, P
Kondo, K
Konigsberg, J
Kopp, S
Kordas, K
Koska, W
Kovacs, E
Kowald, W
Krasberg, M
Kroll, J
Kruse, M
Kuwabara, T
Kuhlmann, SE
Kuns, E
Laasanen, AT
Labanca, N
Lammel, S
Lamoureux, JI
LeCompte, T
Leone, S
Lewis, JD
Limon, P
Lindgren, M
Liss, TM
Lockyer, N
Long, O
Loomis, C
Loreti, M
Lu, J
Lucchesi, D
Lukens, P
Lusin, S
Lys, J
Maeshima, K
Maghakian, A
Maksimovic, P
Mangano, M
Mansour, J
Mariotti, M
Marriner, JP
Martin, A
Matthews, JAJ
Mattingly, R
McIntyre, P
Melese, P
Menzione, A
Meschi, E
Metzler, S
Miao, C
Michail, G
Miller, R
Minato, H
Miscetti, S
Mishina, M
Mitsushio, H
Miyamoto, T
Miyashita, S
Morita, Y
Mueller, J
Mukherjee, A
Muller, T
Murat, P
Nakada, H
Nakano, I
Nelson, C
Neuberger, D
NewmanHolmes, C
Ninomiya, M
Nodulman, L
Oh, SH
Ohl, KE
Ohmoto, T
Ohsugi, T
Oishi, R
Okabe, M
Okusawa, T
Oliver, R
Olsen, J
Pagliarone, C
Paoletti, R
Papadimitriou, V
Pappas, SP
Park, S
Parri, A
Patrick, J
Pauletta, G
Paulini, M
Perazzo, A
Pescara, L
Peters, MD
Phillips, TJ
Piacentino, G
Pillai, M
Pitts, KT
Plunkett, R
Pondrom, L
Proudfoot, J
Ptohos, F
Punzi, G
Ragan, K
Ribon, A
Rimondi, F
Ristori, L
Robertson, WJ
Rodrigo, T
Romano, J
Rosenson, L
Roser, R
Sakumoto, WK
Saltzberg, D
Sansoni, A
Santi, L
Sato, H
Scarpine, V
Schlabach, P
Schmidt, EE
Schmidt, MP
Scribano, A
Segler, S
Seidel, S
Seiya, Y
Sganos, G
Sgolacchia, A
Shapiro, MD
Shaw, NM
Shen, Q
Shepard, PF
Shimojima, M
Shochet, M
Siegrist, J
Sill, A
Sinervo, P
Singh, P
Skarha, J
Sliwa, K
Snider, FD
Song, T
Spalding, J
Sphicas, P
Spinella, F
Spiropulu, M
Spiegel, L
Stanco, L
Steele, J
Stefanini, A
Strahl, K
Strait, J
Strohmer, R
Stuart, D
Sullivan, G
Soumarokov, A
Sumorok, K
Suzuki, J
Takada, T
Takahashi, T
Takano, T
Takikawa, K
Tamura, N
Tannenbaum, B
Tartarelli, F
Taylor, W
Teng, PK
Teramoto, Y
Tether, S
Theriot, D
Thomas, TL
Thun, R
Timko, M
Tipton, P
Titov, A
Tkaczyk, S
Toback, D
Tollefson, K
Tollestrup, A
Tonnison, J
deTroconiz, JF
Truitt, S
Tseng, J
Turini, N
Uchida, T
Uemura, N
Ukegawa, F
Unal, G
vandenBrink, SC
Vejcik, S
Velev, G
Vidal, R
Vondracek, M
Vucinic, D
Wagner, RG
Wagner, RL
Wahl, J
Wang, C
Wang, CH
Wang, G
Wang, J
Wang, MJ
Wang, QF
Warburton, A
Watts, G
Watts, T
Webb, R
Wei, C
Wendt, C
Wenzel, H
Wester, WC
Wicklund, AB
Wicklund, E
Wilkinson, R
Williams, HH
Wilson, P
Winer, BL
Wolinski, D
Wolinski, J
Wu, X
Wyss, J
Yagil, A
Yao, W
Yasuoka, K
Ye, Y
Yeh, GP
Yeh, P
Yin, M
Yoh, J
Yosef, C
Yoshida, T
Yovanovitch, D
Yu, I
Yun, JC
Zanetti, A
Zetti, F
Zhang, L
Zhang, W
Zucchelli, S
AF Abe, F
Akimoto, H
Akopian, A
Albrow, MG
Amendolia, SR
Amidei, D
Antos, J
AnwayWiese, C
Aota, S
Apollinari, G
Asakawa, T
Ashmanskas, W
Atac, M
Auchincloss, P
Azfar, F
AzziBacchetta, P
Bacchetta, N
Badgett, W
Bagdasarov, S
Bailey, MW
Bao, J
deBarbaro, P
BarbaroGaltieri, A
Barnes, VE
Barnett, BA
Bauer, G
Baumann, T
Bedeschi, F
Behrends, S
Belforte, S
Bellettini, G
Bellinger, J
Benjamin, D
Benlloch, J
Bensinger, J
Benton, D
Beretvas, A
Berge, JP
Berryhill, J
Bertolucci, S
Bhatti, A
Biery, K
Binkley, M
Bisello, D
Blair, RE
Blocker, C
Bodek, A
Bokhari, W
Bolognesi, V
Bortoletto, D
Boudreau, J
Breccia, L
Bromberg, C
BuckleyGeer, E
Budd, HS
Burkett, K
Busetto, G
ByonWagner, A
Byrum, KL
Cammerata, J
Campagnari, C
Campbell, M
Caner, A
Carithers, W
Carlsmith, D
Castro, A
Cauz, D
Cen, Y
Cervelli, F
Chao, HY
Chapman, J
Cheng, MT
Chiarelli, G
Chikamatsu, T
Chiou, CN
Christofek, L
Cihangir, S
Clark, AG
Cobal, M
Contreras, M
Conway, J
Cooper, J
Cordelli, M
Couyoumtzelis, C
Crane, D
CroninHennessy, D
Culbertson, R
Cunningham, JD
Daniels, T
DeJongh, F
Delchamps, S
DellAgnello, S
DellOrso, M
Demortier, L
Denby, B
Deninno, M
Derwent, PF
Devlin, T
Dickson, M
Dittmann, JR
Donati, S
Done, J
Dunn, A
Eddy, N
Einsweiler, K
Elias, JE
Ely, R
Engels, E
Errede, D
Errede, S
Fan, Q
Fiori, I
Flaugher, B
Foster, GW
Franklin, M
Frautschi, M
Freeman, J
Friedman, J
Frisch, H
Fuess, TA
Fukui, Y
Funaki, S
Gagliardi, G
Galeotti, S
Gallinaro, M
GarciaSciveres, M
Garfinkel, AF
Gay, C
Geer, S
Gerdes, DW
Giannetti, P
Giokaris, N
Giromini, P
Gladney, L
Glenzinski, D
Gold, M
Gonzalez, J
Gordon, A
Goshaw, AT
Goulianos, K
Grassmann, H
Groer, L
GrossoPilcher, C
Guillian, G
Guo, RS
Haber, C
Hafen, E
Hahn, SR
Hamilton, R
Handler, R
Hans, RM
Hara, K
Hardman, AD
Harral, B
Harris, RM
Hauger, SA
Hauser, J
Hawk, C
Hayashi, E
Heinrich, J
Hoffman, KD
Hohlmann, M
Holck, C
Hollebeek, R
Holloway, L
Holscher, A
Hong, S
Houk, G
Hu, P
Huffman, BT
Hughes, R
Huston, J
Huth, J
Hylen, J
Ikeda, H
Incagli, M
Incandela, J
Introzzi, G
Iwai, J
Iwata, Y
Jensen, H
Joshi, U
Kadel, RW
Kajfasz, E
Kamon, T
Kaneko, T
Karr, K
Kasha, H
Kato, Y
Keeble, L
Kelley, K
Kennedy, RD
Kephart, R
Kesten, P
Kestenbaum, D
Keup, RM
Keutelian, H
Keyvan, F
Kharadia, B
Kim, BJ
Kim, DH
Kim, HS
Kim, SB
Kim, SH
Kim, YK
Kirsch, L
Koehn, P
Kondo, K
Konigsberg, J
Kopp, S
Kordas, K
Koska, W
Kovacs, E
Kowald, W
Krasberg, M
Kroll, J
Kruse, M
Kuwabara, T
Kuhlmann, SE
Kuns, E
Laasanen, AT
Labanca, N
Lammel, S
Lamoureux, JI
LeCompte, T
Leone, S
Lewis, JD
Limon, P
Lindgren, M
Liss, TM
Lockyer, N
Long, O
Loomis, C
Loreti, M
Lu, J
Lucchesi, D
Lukens, P
Lusin, S
Lys, J
Maeshima, K
Maghakian, A
Maksimovic, P
Mangano, M
Mansour, J
Mariotti, M
Marriner, JP
Martin, A
Matthews, JAJ
Mattingly, R
McIntyre, P
Melese, P
Menzione, A
Meschi, E
Metzler, S
Miao, C
Michail, G
Miller, R
Minato, H
Miscetti, S
Mishina, M
Mitsushio, H
Miyamoto, T
Miyashita, S
Morita, Y
Mueller, J
Mukherjee, A
Muller, T
Murat, P
Nakada, H
Nakano, I
Nelson, C
Neuberger, D
NewmanHolmes, C
Ninomiya, M
Nodulman, L
Oh, SH
Ohl, KE
Ohmoto, T
Ohsugi, T
Oishi, R
Okabe, M
Okusawa, T
Oliver, R
Olsen, J
Pagliarone, C
Paoletti, R
Papadimitriou, V
Pappas, SP
Park, S
Parri, A
Patrick, J
Pauletta, G
Paulini, M
Perazzo, A
Pescara, L
Peters, MD
Phillips, TJ
Piacentino, G
Pillai, M
Pitts, KT
Plunkett, R
Pondrom, L
Proudfoot, J
Ptohos, F
Punzi, G
Ragan, K
Ribon, A
Rimondi, F
Ristori, L
Robertson, WJ
Rodrigo, T
Romano, J
Rosenson, L
Roser, R
Sakumoto, WK
Saltzberg, D
Sansoni, A
Santi, L
Sato, H
Scarpine, V
Schlabach, P
Schmidt, EE
Schmidt, MP
Scribano, A
Segler, S
Seidel, S
Seiya, Y
Sganos, G
Sgolacchia, A
Shapiro, MD
Shaw, NM
Shen, Q
Shepard, PF
Shimojima, M
Shochet, M
Siegrist, J
Sill, A
Sinervo, P
Singh, P
Skarha, J
Sliwa, K
Snider, FD
Song, T
Spalding, J
Sphicas, P
Spinella, F
Spiropulu, M
Spiegel, L
Stanco, L
Steele, J
Stefanini, A
Strahl, K
Strait, J
Strohmer, R
Stuart, D
Sullivan, G
Soumarokov, A
Sumorok, K
Suzuki, J
Takada, T
Takahashi, T
Takano, T
Takikawa, K
Tamura, N
Tannenbaum, B
Tartarelli, F
Taylor, W
Teng, PK
Teramoto, Y
Tether, S
Theriot, D
Thomas, TL
Thun, R
Timko, M
Tipton, P
Titov, A
Tkaczyk, S
Toback, D
Tollefson, K
Tollestrup, A
Tonnison, J
deTroconiz, JF
Truitt, S
Tseng, J
Turini, N
Uchida, T
Uemura, N
Ukegawa, F
Unal, G
vandenBrink, SC
Vejcik, S
Velev, G
Vidal, R
Vondracek, M
Vucinic, D
Wagner, RG
Wagner, RL
Wahl, J
Wang, C
Wang, CH
Wang, G
Wang, J
Wang, MJ
Wang, QF
Warburton, A
Watts, G
Watts, T
Webb, R
Wei, C
Wendt, C
Wenzel, H
Wester, WC
Wicklund, AB
Wicklund, E
Wilkinson, R
Williams, HH
Wilson, P
Winer, BL
Wolinski, D
Wolinski, J
Wu, X
Wyss, J
Yagil, A
Yao, W
Yasuoka, K
Ye, Y
Yeh, GP
Yeh, P
Yin, M
Yoh, J
Yosef, C
Yoshida, T
Yovanovitch, D
Yu, I
Yun, JC
Zanetti, A
Zetti, F
Zhang, L
Zhang, W
Zucchelli, S
TI Search for gluino and squark cascade decays at the Fermilab tevatron
collider
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ALPHA-S CALCULATION; Z0 DECAYS; SUPERGRAVITY; COLLISIONS; PARTICLES;
DETECTOR; LEP; TEV
AB We report on a search for supersymmetry using dilepton events which complements the classic missing E(T) plus multijet analyses. Using 19 pb(-1) of
collisions at root s = 1.8 TeV recorded with the Collider Detector at Fermilab we have searched for squarks and gluinos decaying into charginos and producing events with two leptons. We observe one candidate event. In comparison, the expected number of background events from standard model processes is 2.39 +/- 0.63(stat)(-0.42)(+0.77)(syst). Hence we set limits on gluino and squark production based on predictions from the supergravity inspired minimal supersymmetric extension of the standard model.
C1 ARGONNE NATL LAB,ARGONNE,IL 60439.
UNIV BOLOGNA,IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY.
BRANDEIS UNIV,WALTHAM,MA 02254.
UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024.
UNIV CHICAGO,CHICAGO,IL 60637.
DUKE UNIV,DURHAM,NC 27708.
FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510.
IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY.
HARVARD UNIV,CAMBRIDGE,MA 02138.
HIROSHIMA UNIV,HIGASHI KU,HIROSHIMA 724,JAPAN.
UNIV ILLINOIS,URBANA,IL 61801.
MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA.
UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA.
JOHNS HOPKINS UNIV,BALTIMORE,MD 21218.
LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
MIT,CAMBRIDGE,MA 02139.
UNIV MICHIGAN,ANN ARBOR,MI 48109.
MICHIGAN STATE UNIV,E LANSING,MI 48824.
UNIV NEW MEXICO,ALBUQUERQUE,NM 87131.
OSAKA CITY UNIV,OSAKA 588,JAPAN.
UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY.
UNIV PENN,PHILADELPHIA,PA 19104.
UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY.
SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY.
UNIV PITTSBURGH,PITTSBURGH,PA 15260.
PURDUE UNIV,W LAFAYETTE,IN 47907.
UNIV ROCHESTER,ROCHESTER,NY 14627.
ROCKEFELLER UNIV,NEW YORK,NY 10021.
RUTGERS STATE UNIV,PISCATAWAY,NJ 08854.
ACAD SINICA,TAIPEI 11529,TAIWAN.
TEXAS A&M UNIV,COLLEGE STN,TX 77843.
TEXAS TECH UNIV,LUBBOCK,TX 79409.
UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN.
TUFTS UNIV,MEDFORD,MA 02155.
UNIV WISCONSIN,MADISON,WI 53706.
YALE UNIV,NEW HAVEN,CT 06511.
RP Abe, F (reprint author), KEK NAT LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN.
RI Vucinic, Dejan/C-2406-2008; Azzi, Patrizia/H-5404-2012; Punzi,
Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012; Warburton,
Andreas/N-8028-2013; Kim, Soo-Bong/B-7061-2014; Paulini,
Manfred/N-7794-2014; Introzzi, Gianluca/K-2497-2015; Tartarelli,
Giuseppe Francesco/A-5629-2016
OI Bertolucci, Sergio/0000-0003-1738-4736; Gallinaro,
Michele/0000-0003-1261-2277; Benlloch Baviera, Jose
Maria/0000-0001-6073-1436; Turini, Nicola/0000-0002-9395-5230; Wyss,
Jeffery/0000-0002-8277-4012; Azzi, Patrizia/0000-0002-3129-828X; Punzi,
Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816;
Warburton, Andreas/0000-0002-2298-7315; Paulini,
Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580;
Tartarelli, Giuseppe Francesco/0000-0002-4244-502X
NR 26
TC 40
Z9 40
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2006
EP 2010
DI 10.1103/PhysRevLett.76.2006
PG 5
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400006
ER
PT J
AU Abe, F
Albrow, MG
Amendolia, SR
Amidei, D
Antos, J
AnwayWiese, C
Apollinari, G
Areti, H
Atac, M
Auchincloss, P
Azfar, F
Azzi, P
Bacchetta, N
Badgett, W
Bailey, MW
Bao, J
deBarbaro, P
BarbaroGaltieri, A
Barnes, VE
Barnett, BA
Bartalini, P
Bauer, G
Baumann, T
Bedeschi, F
Behrends, S
Belforte, S
Bellettini, G
Bellinger, J
Benjamin, D
Benlloch, J
Bensinger, J
Benton, D
Beretvas, A
Berge, JP
Bertolucci, S
Bhatti, A
Biery, K
Binkley, M
Bird, F
Bisello, D
Blair, RE
Blocker, C
Bodek, A
Bokhari, W
Bolognesi, V
Bortoletto, D
Boswell, C
Boulos, T
Brandenburg, G
Bromberg, C
BuckleyGeer, E
Budd, HS
Burkett, K
Busetto, G
ByonWagner, A
Byrum, KL
Cammerata, J
Campagnari, C
Campbell, M
Caner, A
Carithers, W
Carlsmith, D
Castro, A
Cen, Y
Cervelli, F
Chao, HY
Chapman, J
Cheng, MT
Chiarelli, G
Chikamatsu, T
Chiou, CN
Christofek, L
Cihangir, S
Clark, AG
Cobal, M
Contreras, M
Conway, J
Cooper, J
Cordelli, M
Couyoumtzelis, C
Crane, D
Cunningham, JD
Daniels, T
DeJongh, F
Delchamps, S
DellAgnello, S
DellOrso, M
Demortier, L
Denby, B
Deninno, M
Derwent, PF
Devlin, T
Dickson, M
Dittmann, JR
Donati, S
Drucker, RB
Dunn, A
Einsweiler, K
Elias, JE
Ely, R
Engels, E
Eno, S
Errede, D
Errede, S
Fan, Q
Farhat, B
Fiori, I
Flaugher, B
Foster, GW
Franklin, M
Frautschi, M
Freeman, J
Friedman, J
Fry, A
Fuess, TA
Fukui, Y
Funaki, S
Gagliardi, G
Galeotti, S
Gallinaro, M
Garfinkel, AF
Geer, S
Gerdes, DW
Giannetti, P
Giokaris, N
Giromini, P
Gladney, L
Glenzinski, D
Gold, M
Gonzalez, J
Gordon, A
Goshaw, AT
Goulianos, K
Grassmann, H
Grewal, A
Groer, L
GrossoPilcher, C
Haber, C
Hahn, SR
Hamilton, R
Handler, R
Hans, RM
Hara, K
Harral, B
Harris, RM
Hauger, SA
Hauser, J
Hawk, C
Heinrich, J
CroninHennessy, D
Hollebeek, R
Holloway, L
Holscher, A
Hong, S
Houk, G
Hu, P
Huffman, BT
Hughes, R
Hurst, P
Huston, J
Huth, J
Hylen, J
Incagli, M
Incandela, J
Iso, H
Jensen, H
Jessop, CP
Joshi, U
Kadel, RW
Kajfasz, E
Kamon, T
Kaneko, T
Kardelis, DA
Kasha, H
Kato, Y
Keeble, L
Kennedy, RD
Kephart, R
Kesten, P
Kestenbaum, D
Keup, RM
Keutelian, H
Keyvan, F
Kim, DH
Kim, HS
Kim, SB
Kim, SH
Kim, YK
Kirsch, L
Koehn, P
Kondo, K
Konigsberg, J
Kopp, S
Kordas, K
Koska, W
Kovacs, E
Kowald, W
Krasberg, M
Kroll, J
Kruse, N
Kuhlmann, SE
Kuns, E
Laasanen, AT
Labanca, N
Lammel, S
Lamoureux, JI
LeCompte, T
Leone, S
Lewis, JD
Limon, P
Lindgren, M
Liss, TM
Lockyer, N
Loomis, C
Long, O
Loreti, M
Low, EH
Lu, J
Lucchesi, D
Luchini, CB
Lukens, P
Lys, J
Maas, P
Maeshima, K
Maghakian, A
Maksimovic, P
Mangano, M
Mansour, J
Mariotti, M
Marriner, JP
Martin, A
Matthews, JAJ
Mattingly, R
McIntyre, P
Melese, P
Menzione, A
Meschi, E
Michail, G
Mikamo, S
Miller, M
Miller, R
Mimashi, T
Miscetti, S
Mishina, M
Mitsushio, H
Miyashita, S
Morita, Y
Moulding, S
Mueller, J
Mukherjee, A
Muller, T
Musgrave, P
Nakae, LF
Nakano, I
Nelson, C
Neuberger, D
NewmanHolmes, C
Nodulman, L
Ogawa, S
Oh, SH
Ohl, KE
Oishi, R
Okusawa, T
Pagliarone, C
Paoletti, R
Papadimitriou, V
Pappas, SP
Park, S
Patrick, J
Pauletta, G
Paulini, M
Pescara, L
Peters, MD
Phillips, TJ
Piacentino, G
Pillai, M
Plunkett, R
Pondrom, L
Produit, N
Proudfoot, J
Ptohos, F
Punzi, G
Ragan, K
Rimondi, F
Ristori, L
RoachBellino, M
Robertson, WJ
Rodrigo, T
Romano, J
Rosenson, L
Sakumoto, WK
Saltzberg, D
Sansoni, A
Scarpine, V
Schindler, A
Schlabach, P
Schmidt, EE
Schmidt, MP
Schneider, O
Sciacca, GF
Scribano, A
Segler, S
Seidel, S
Seiya, Y
Sganos, G
Sgolacchia, A
Shapiro, M
Shaw, NM
Shen, Q
Shepard, PF
Shimojima, M
Shochet, M
Siegrist, J
Sill, A
Sinervo, P
Singh, P
Skarha, J
Sliwa, K
Smith, DA
Snider, FD
Song, L
Song, T
Spalding, J
Spiegel, L
Sphicas, P
Stanco, L
Steele, J
Stefanini, A
Strahl, K
Strait, J
Stuart, D
Sullivan, G
Sumorok, K
Swartz, RL
Takahashi, T
Takikawa, K
Tartarelli, F
Taylor, W
Teng, PK
Teramoto, Y
Tether, S
Theriot, D
Thomas, J
Thomas, TL
Thun, R
Timko, M
Tipton, P
Titov, A
Tkaczyk, S
Tollefson, K
Tollestrup, A
Tonnison, J
deTroconiz, JF
Tseng, J
Turcotte, M
Turini, N
Uemura, N
Ukegawa, F
Unal, G
vandenBrink, SC
Vejcik, S
Vidal, R
Vondracek, M
Vucunic, D
Wagner, RG
Wagner, RL
Wainer, N
Walker, RC
Wang, C
Wang, CH
Wang, G
Wang, J
Wang, MJ
Wang, QF
Warburton, A
Watts, G
Watts, T
Webb, R
Wei, C
Wendt, C
Wenzel, H
Wester, WC
Westhusing, T
Wicklund, AB
Wicklund, E
Wilkinson, R
Williams, HH
Wilson, P
Winer, BL
Wolinski, J
Wu, DY
Wu, X
Wyss, J
Yagil, A
Yao, W
Yasuoka, K
Ye, Y
Yeh, GP
Yeh, P
Yin, M
Yoh, J
Yosef, C
Yoshida, T
Yovanovitch, D
Yu, I
Yun, JC
Zanetti, A
Zetti, F
Zhang, L
Zhang, S
Zhang, W
Zucchelli, S
AF Abe, F
Albrow, MG
Amendolia, SR
Amidei, D
Antos, J
AnwayWiese, C
Apollinari, G
Areti, H
Atac, M
Auchincloss, P
Azfar, F
Azzi, P
Bacchetta, N
Badgett, W
Bailey, MW
Bao, J
deBarbaro, P
BarbaroGaltieri, A
Barnes, VE
Barnett, BA
Bartalini, P
Bauer, G
Baumann, T
Bedeschi, F
Behrends, S
Belforte, S
Bellettini, G
Bellinger, J
Benjamin, D
Benlloch, J
Bensinger, J
Benton, D
Beretvas, A
Berge, JP
Bertolucci, S
Bhatti, A
Biery, K
Binkley, M
Bird, F
Bisello, D
Blair, RE
Blocker, C
Bodek, A
Bokhari, W
Bolognesi, V
Bortoletto, D
Boswell, C
Boulos, T
Brandenburg, G
Bromberg, C
BuckleyGeer, E
Budd, HS
Burkett, K
Busetto, G
ByonWagner, A
Byrum, KL
Cammerata, J
Campagnari, C
Campbell, M
Caner, A
Carithers, W
Carlsmith, D
Castro, A
Cen, Y
Cervelli, F
Chao, HY
Chapman, J
Cheng, MT
Chiarelli, G
Chikamatsu, T
Chiou, CN
Christofek, L
Cihangir, S
Clark, AG
Cobal, M
Contreras, M
Conway, J
Cooper, J
Cordelli, M
Couyoumtzelis, C
Crane, D
Cunningham, JD
Daniels, T
DeJongh, F
Delchamps, S
DellAgnello, S
DellOrso, M
Demortier, L
Denby, B
Deninno, M
Derwent, PF
Devlin, T
Dickson, M
Dittmann, JR
Donati, S
Drucker, RB
Dunn, A
Einsweiler, K
Elias, JE
Ely, R
Engels, E
Eno, S
Errede, D
Errede, S
Fan, Q
Farhat, B
Fiori, I
Flaugher, B
Foster, GW
Franklin, M
Frautschi, M
Freeman, J
Friedman, J
Fry, A
Fuess, TA
Fukui, Y
Funaki, S
Gagliardi, G
Galeotti, S
Gallinaro, M
Garfinkel, AF
Geer, S
Gerdes, DW
Giannetti, P
Giokaris, N
Giromini, P
Gladney, L
Glenzinski, D
Gold, M
Gonzalez, J
Gordon, A
Goshaw, AT
Goulianos, K
Grassmann, H
Grewal, A
Groer, L
GrossoPilcher, C
Haber, C
Hahn, SR
Hamilton, R
Handler, R
Hans, RM
Hara, K
Harral, B
Harris, RM
Hauger, SA
Hauser, J
Hawk, C
Heinrich, J
CroninHennessy, D
Hollebeek, R
Holloway, L
Holscher, A
Hong, S
Houk, G
Hu, P
Huffman, BT
Hughes, R
Hurst, P
Huston, J
Huth, J
Hylen, J
Incagli, M
Incandela, J
Iso, H
Jensen, H
Jessop, CP
Joshi, U
Kadel, RW
Kajfasz, E
Kamon, T
Kaneko, T
Kardelis, DA
Kasha, H
Kato, Y
Keeble, L
Kennedy, RD
Kephart, R
Kesten, P
Kestenbaum, D
Keup, RM
Keutelian, H
Keyvan, F
Kim, DH
Kim, HS
Kim, SB
Kim, SH
Kim, YK
Kirsch, L
Koehn, P
Kondo, K
Konigsberg, J
Kopp, S
Kordas, K
Koska, W
Kovacs, E
Kowald, W
Krasberg, M
Kroll, J
Kruse, N
Kuhlmann, SE
Kuns, E
Laasanen, AT
Labanca, N
Lammel, S
Lamoureux, JI
LeCompte, T
Leone, S
Lewis, JD
Limon, P
Lindgren, M
Liss, TM
Lockyer, N
Loomis, C
Long, O
Loreti, M
Low, EH
Lu, J
Lucchesi, D
Luchini, CB
Lukens, P
Lys, J
Maas, P
Maeshima, K
Maghakian, A
Maksimovic, P
Mangano, M
Mansour, J
Mariotti, M
Marriner, JP
Martin, A
Matthews, JAJ
Mattingly, R
McIntyre, P
Melese, P
Menzione, A
Meschi, E
Michail, G
Mikamo, S
Miller, M
Miller, R
Mimashi, T
Miscetti, S
Mishina, M
Mitsushio, H
Miyashita, S
Morita, Y
Moulding, S
Mueller, J
Mukherjee, A
Muller, T
Musgrave, P
Nakae, LF
Nakano, I
Nelson, C
Neuberger, D
NewmanHolmes, C
Nodulman, L
Ogawa, S
Oh, SH
Ohl, KE
Oishi, R
Okusawa, T
Pagliarone, C
Paoletti, R
Papadimitriou, V
Pappas, SP
Park, S
Patrick, J
Pauletta, G
Paulini, M
Pescara, L
Peters, MD
Phillips, TJ
Piacentino, G
Pillai, M
Plunkett, R
Pondrom, L
Produit, N
Proudfoot, J
Ptohos, F
Punzi, G
Ragan, K
Rimondi, F
Ristori, L
RoachBellino, M
Robertson, WJ
Rodrigo, T
Romano, J
Rosenson, L
Sakumoto, WK
Saltzberg, D
Sansoni, A
Scarpine, V
Schindler, A
Schlabach, P
Schmidt, EE
Schmidt, MP
Schneider, O
Sciacca, GF
Scribano, A
Segler, S
Seidel, S
Seiya, Y
Sganos, G
Sgolacchia, A
Shapiro, M
Shaw, NM
Shen, Q
Shepard, PF
Shimojima, M
Shochet, M
Siegrist, J
Sill, A
Sinervo, P
Singh, P
Skarha, J
Sliwa, K
Smith, DA
Snider, FD
Song, L
Song, T
Spalding, J
Spiegel, L
Sphicas, P
Stanco, L
Steele, J
Stefanini, A
Strahl, K
Strait, J
Stuart, D
Sullivan, G
Sumorok, K
Swartz, RL
Takahashi, T
Takikawa, K
Tartarelli, F
Taylor, W
Teng, PK
Teramoto, Y
Tether, S
Theriot, D
Thomas, J
Thomas, TL
Thun, R
Timko, M
Tipton, P
Titov, A
Tkaczyk, S
Tollefson, K
Tollestrup, A
Tonnison, J
deTroconiz, JF
Tseng, J
Turcotte, M
Turini, N
Uemura, N
Ukegawa, F
Unal, G
vandenBrink, SC
Vejcik, S
Vidal, R
Vondracek, M
Vucunic, D
Wagner, RG
Wagner, RL
Wainer, N
Walker, RC
Wang, C
Wang, CH
Wang, G
Wang, J
Wang, MJ
Wang, QF
Warburton, A
Watts, G
Watts, T
Webb, R
Wei, C
Wendt, C
Wenzel, H
Wester, WC
Westhusing, T
Wicklund, AB
Wicklund, E
Wilkinson, R
Williams, HH
Wilson, P
Winer, BL
Wolinski, J
Wu, DY
Wu, X
Wyss, J
Yagil, A
Yao, W
Yasuoka, K
Ye, Y
Yeh, GP
Yeh, P
Yin, M
Yoh, J
Yosef, C
Yoshida, T
Yovanovitch, D
Yu, I
Yun, JC
Zanetti, A
Zetti, F
Zhang, L
Zhang, S
Zhang, W
Zucchelli, S
TI Reconstruction of B-0->J/psi K-S(0) and measurement of ratios of
branching ratios involving B->J/psi K* and B+->J/psi K+
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DECAYS; MESONS
AB We report on the reconstruction of the decay mode B-0 --> J/psi K-S(0) using 19.3 pb(-1) of data collected by the Collider Detector at Fermilab in <(p)over bar p> collisions at root s = 1.8 TeV. A signal of 41.8 +/- 6.9 events, with a signal-to-background ratio of 9:1, is observed. Three additional decay modes B+ --> J/psi K+, B-0 --> J/psi K*(892)(0), and B+ --> J/psi K*(892)(+) are reconstructed. We measure three ratios of branching ratios, each one relative to the B+ --> J/psi K+ mode. We also report the ratio of decay rates, Gamma(B --> J/psi K*)/Gamma(B --> J/psi K), for the vector-vector relative to the vector-pseudoscalar modes, to be 1.32 +/- 0.23(stat) +/- 0.16(syst).
C1 ARGONNE NATL LAB,ARGONNE,IL 60439.
UNIV BOLOGNA,IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY.
BRANDEIS UNIV,WALTHAM,MA 02254.
UNIV CALIF LOS ANGELES,LOS ANGELES,CA 90024.
UNIV CHICAGO,CHICAGO,IL 60637.
DUKE UNIV,DURHAM,NC 27708.
FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510.
IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY.
HARVARD UNIV,CAMBRIDGE,MA 02138.
UNIV ILLINOIS,URBANA,IL 61801.
MCGILL UNIV,INST PARTICLE PHYS,MONTREAL,PQ H3A 2T8,CANADA.
UNIV TORONTO,TORONTO,ON M5S 1A7,CANADA.
JOHNS HOPKINS UNIV,BALTIMORE,MD 21218.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
MIT,CAMBRIDGE,MA 02139.
UNIV MICHIGAN,ANN ARBOR,MI 48109.
MICHIGAN STATE UNIV,E LANSING,MI 48824.
UNIV NEW MEXICO,ALBUQUERQUE,NM 87131.
OSAKA CITY UNIV,OSAKA 588,JAPAN.
UNIV PADUA,IST NAZL FIS NUCL,I-35131 PADUA,ITALY.
UNIV PENN,PHILADELPHIA,PA 19104.
UNIV PISA,IST NAZL FIS NUCL,I-56100 PISA,ITALY.
SCUOLA NORMALE SUPER PISA,I-56100 PISA,ITALY.
UNIV PITTSBURGH,PITTSBURGH,PA 15260.
PURDUE UNIV,W LAFAYETTE,IN 47907.
UNIV ROCHESTER,ROCHESTER,NY 14627.
ROCKEFELLER UNIV,NEW YORK,NY 10021.
RUTGERS STATE UNIV,PISCATAWAY,NJ 08854.
ACAD SINICA,TAIPEI 11529,TAIWAN.
SUPERCONDUCTING SUPER COLLIDER LAB,DALLAS,TX 75237.
TEXAS A&M UNIV,COLLEGE STN,TX 77843.
TEXAS TECH UNIV,LUBBOCK,TX 79409.
UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN.
TUFTS UNIV,MEDFORD,MA 02155.
UNIV WISCONSIN,MADISON,WI 53706.
YALE UNIV,NEW HAVEN,CT 06511.
RP Abe, F (reprint author), KEK NAT LAB HIGH ENERGY PHYS,TSUKUBA,IBARAKI 305,JAPAN.
RI Azzi, Patrizia/H-5404-2012; Punzi, Giovanni/J-4947-2012; Chiarelli,
Giorgio/E-8953-2012; Warburton, Andreas/N-8028-2013; Kim,
Soo-Bong/B-7061-2014; Paulini, Manfred/N-7794-2014
OI Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052;
Chiarelli, Giorgio/0000-0001-9851-4816; Warburton,
Andreas/0000-0002-2298-7315; Paulini, Manfred/0000-0002-6714-5787
NR 20
TC 17
Z9 17
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2015
EP 2020
DI 10.1103/PhysRevLett.76.2015
PG 6
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400008
ER
PT J
AU Akiba, Y
Beavis, D
Berry, P
Britt, HC
Budick, B
Chasman, C
Chen, Z
Chi, CY
Chu, YY
Cianciolo, V
Cole, BA
Costales, JB
Crawford, HJ
Cummings, JB
Debbe, R
Engelage, J
Fung, SY
Gonin, M
Gushue, S
Hamagaki, H
Hansen, O
Hayano, RS
Hayashi, S
Homma, S
Kaneko, H
Kang, J
Kaufman, S
Kehoe, WL
Kurita, K
Ledoux, RJ
Levine, MJ
Miake, Y
Morrison, DP
Morse, RJ
Moskowitz, B
Nagamiya, S
Namboodiri, MN
Nayak, TK
Olness, J
Parsons, CG
Remsberg, LP
Roehrich, D
Rothschild, P
Sakurai, H
Sangster, TC
Seto, R
Soltz, R
Stankus, P
Steadman, SG
Stephans, GSF
Sung, T
Tanaka, Y
Tannenbaum, MJ
Thomas, J
Tonse, S
VanDijk, JH
Videbaek, F
Vossnack, O
Vutsadakis, V
Wang, FQ
Wang, Y
Wegner, HE
Woodruff, DS
Wu, YD
Yang, X
Zachary, D
Zajc, WA
AF Akiba, Y
Beavis, D
Berry, P
Britt, HC
Budick, B
Chasman, C
Chen, Z
Chi, CY
Chu, YY
Cianciolo, V
Cole, BA
Costales, JB
Crawford, HJ
Cummings, JB
Debbe, R
Engelage, J
Fung, SY
Gonin, M
Gushue, S
Hamagaki, H
Hansen, O
Hayano, RS
Hayashi, S
Homma, S
Kaneko, H
Kang, J
Kaufman, S
Kehoe, WL
Kurita, K
Ledoux, RJ
Levine, MJ
Miake, Y
Morrison, DP
Morse, RJ
Moskowitz, B
Nagamiya, S
Namboodiri, MN
Nayak, TK
Olness, J
Parsons, CG
Remsberg, LP
Roehrich, D
Rothschild, P
Sakurai, H
Sangster, TC
Seto, R
Soltz, R
Stankus, P
Steadman, SG
Stephans, GSF
Sung, T
Tanaka, Y
Tannenbaum, MJ
Thomas, J
Tonse, S
VanDijk, JH
Videbaek, F
Vossnack, O
Vutsadakis, V
Wang, FQ
Wang, Y
Wegner, HE
Woodruff, DS
Wu, YD
Yang, X
Zachary, D
Zajc, WA
TI Production of phi mesons in central Si-28+Au-196 collisions at 14.6A
GeV/c
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HOT
AB Production of the phi meson in central Si + Au collisions has been measured by E859 at the Brookhaven Alternating Gradient Synchrotron by selecting events with identified K+K- pairs. The mass and width of the phi, obtained from the invariant mass distribution of kaon pairs, are consistent with those of free phi mesons. The transverse mass and rapidity distributions are presented. The inverse slope parameter for an exponential fit to the invariant transverse mass distribution is 179 +/- 10 +/- 17 MeV.
C1 ARGONNE NATL LAB,ARGONNE,IL 60439.
BROOKHAVEN NATL LAB,UPTON,NY 11973.
UNIV CALIF BERKELEY,SPACE SCI LAB,BERKELEY,CA 94720.
UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92507.
COLUMBIA UNIV,NEW YORK,NY 10027.
NEVIS LABS,IRVINGTON,NY 10533.
KYOTO UNIV,SAKYO KU,KYOTO 606,JAPAN.
KYUSHU UNIV,FUKUOKA 812,JAPAN.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
MIT,CAMBRIDGE,MA 02139.
NYU,NEW YORK,NY 10003.
UNIV TOKYO,DEPT PHYS,TOKYO 113,JAPAN.
UNIV TSUKUBA,TSUKUBA,IBARAKI 305,JAPAN.
RP Akiba, Y (reprint author), UNIV TOKYO,INST NUCL STUDY,TOKYO 188,JAPAN.
RI seto, richard/G-8467-2011; SAKURAI, HIROYOSHI/G-5085-2014; Hayano,
Ryugo/F-7889-2012; HAMAGAKI, HIDEKI/G-4899-2014;
OI Hayano, Ryugo/0000-0002-1214-7806; Tannenbaum,
Michael/0000-0002-8840-5314; Thomas, James/0000-0002-6256-4536
NR 22
TC 26
Z9 27
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2021
EP 2024
DI 10.1103/PhysRevLett.76.2021
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400009
ER
PT J
AU Ramakrishnan, E
Baumann, T
Azhari, A
Kryger, RA
Pfaff, R
Thoennessen, M
Yokoyama, S
Beene, JR
Halbert, ML
Mueller, PE
Stracener, DW
Varner, RL
Charity, RJ
Dempsey, JF
Sarantites, DG
Sobotka, LG
AF Ramakrishnan, E
Baumann, T
Azhari, A
Kryger, RA
Pfaff, R
Thoennessen, M
Yokoyama, S
Beene, JR
Halbert, ML
Mueller, PE
Stracener, DW
Varner, RL
Charity, RJ
Dempsey, JF
Sarantites, DG
Sobotka, LG
TI Giant dipole resonance built on highly excited states of Sn-120 nuclei
populated by inelastic alpha scattering
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID LEVEL-DENSITY PARAMETER; HOT ROTATING NUCLEI; EXCITATION-ENERGY;
FLUCTUATIONS; SHAPE; DEPENDENCE
AB High energy gamma rays from the decay of the giant resonance in hot Sn-120 nuclei were measured in the excitation energy range of 30-130 MeV. The excited nuclei were populated by inelastic scattering of a particles at 40 and 50 MeV/nucleon. The resonance width was observed to increase monotonically with increasing excitation energy, from 5 MeV at the ground state to similar to 12 MeV at the largest excitation energy. Inelastic scattering predominantly populates low angular momentum states, and the observed width increase is thus attributed to fluctuations in the nuclear shape induced by temperature.
C1 MICHIGAN STATE UNIV,NATL SUPERCOND CYCLOTRON LAB,E LANSING,MI 48824.
MICHIGAN STATE UNIV,DEPT PHYS & ASTRON,E LANSING,MI 48824.
OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
WASHINGTON UNIV,DEPT CHEM,ST LOUIS,MO 63130.
OI Charity, Robert/0000-0003-3020-4998
NR 23
TC 83
Z9 84
U1 1
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2025
EP 2028
DI 10.1103/PhysRevLett.76.2025
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400010
ER
PT J
AU Hayden, ME
Hardy, WN
AF Hayden, ME
Hardy, WN
TI Spin exchange and recombination in a gas of atomic hydrogen at 1.2 K
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID FREQUENCY-SHIFTS; COLLISIONS; MASER
AB We report an accurate measurement of the longitudinal spin-exchange broadening cross section for the Delta F = 1, Delta m(f) = 0 hyperfine transition of the hydrogen atom at 1.2 K. The result, <(sigma)over bar> = 0.51(2) Angstrom(2), is the first of its kind which is sufficiently accurate to clearly demonstrate disagreement with theory. Resolution of this discrepancy is relevant to the understanding of cold atom collisions and may involve a revision of the long range part of the ab initio H atom pair potentials. A by-product of our work is an improved measurement of the two body recombination rate constant k = 1.9(1) x 10(-33) cm(6)/s for the gas phase reaction H + H + He-4 --> H-2 + He-4.
C1 LOS ALAMOS NATL LAB,DEPT CONDENSED MATTER & THERMAL PHYS,LOS ALAMOS,NM 87545.
RP Hayden, ME (reprint author), UNIV BRITISH COLUMBIA,DEPT PHYS,6224 AGR RD,VANCOUVER,BC V6T 1Z1,CANADA.
NR 22
TC 8
Z9 8
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2041
EP 2044
DI 10.1103/PhysRevLett.76.2041
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400014
ER
PT J
AU Kirkwood, RK
Afeyan, BB
Kruer, WL
MacGowan, BJ
Moody, JD
Montgomery, DS
Pennington, DM
Weiland, TL
Wilks, SC
AF Kirkwood, RK
Afeyan, BB
Kruer, WL
MacGowan, BJ
Moody, JD
Montgomery, DS
Pennington, DM
Weiland, TL
Wilks, SC
TI Observation of energy transfer between frequency-mismatched laser beams
in a large-scale plasma
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SCATTERING; WAVES
AB The observation of energy transfer between two frequency-mismatched laser beams crossing in a low-density, large-scale plasma is described. The beams cross at an angle of 53 degrees from parallel, with the average intensity in the blue beam equal to 2 x 10(15) W/cm(2). A redshifted probe beam is amplified by interaction with the blue beam and a stimulated ion acoustic wave. Significant energy is transferred to the probe when the difference in the frequencies of the two beams is comparable to the frequency of the acoustic wave. As much as 52% of the pump energy is transferred to the probe.
C1 UNIV CALIF, LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA.
RP UNIV CALIF, LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA.
OI Montgomery, David/0000-0002-2355-6242
NR 18
TC 67
Z9 68
U1 0
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2065
EP 2068
DI 10.1103/PhysRevLett.76.2065
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400020
ER
PT J
AU Peng, JP
Lynn, KG
AsokaKumar, P
Becker, DP
Harshman, DR
AF Peng, JP
Lynn, KG
AsokaKumar, P
Becker, DP
Harshman, DR
TI Study of the SiO2-Si interface using variable energy positron
two-dimensional angular correlation of annihilation radiation
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SILICON
AB The defect structure of the SiO2-Si interface has been studied using variable energy positron two-dimensional angular correlation of annihilation radiation (2D-ACAR). As the first depth-resolved 2D-ACAR measurement, unique information about this interface was obtained: The formation and trapping of positronium atoms are observed at the microvoids (similar to 10 Angstrom in size) in the oxide and interface regions. Positron trapping and annihilation at the P-b centers in the interface region are inferred. The existence of the microvoids in the interface region is beyond the current interface model, and the results may have a profound impact on the understanding of the interface growth.
C1 AT&T BELL LABS, MURRAY HILL, NJ 07974 USA.
RP BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA.
NR 14
TC 16
Z9 16
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2157
EP 2160
DI 10.1103/PhysRevLett.76.2157
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400043
ER
PT J
AU Kleiner, R
Katz, AS
Sun, AG
Summer, R
Gajewski, DA
Han, SH
Woods, SI
Dantsker, E
Chen, B
Char, K
Maple, MB
Dynes, RC
Clarke, J
AF Kleiner, R
Katz, AS
Sun, AG
Summer, R
Gajewski, DA
Han, SH
Woods, SI
Dantsker, E
Chen, B
Char, K
Maple, MB
Dynes, RC
Clarke, J
TI Pair tunneling from c-axis YBa2Cu3O7-x to Pb: Evidence for s-wave
component from microwave induced steps
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTIVITY; OXIDES; STATE
AB In heavily twinned crystals or films of YBa2Cu3O7-x (YBCO), d(x2-y2) pairing symmetry is expected to cause the cancellation of first-order Josephson tunneling through a YBCO-Pb tunnel junction grown on an a-b face; any residual tunneling is thus second order. As a result, microwaves at frequency f are predicted to induce steps on the current-voltage characteristic at voltages that are multiples of 1/2(hf/2e). Experimentally, steps are observed only at multiples of hf/2e, suggesting that s-wave pairings present in YBCO; however, the simultaneous presence of d-wave pairing is by no means ruled out.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720.
UNIV CALIF SAN DIEGO,DEPT PHYS,LA JOLLA,CA 92093.
CONDUCTUS INC,SUNNYVALE,CA 94086.
RP Kleiner, R (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720, USA.
NR 21
TC 118
Z9 121
U1 0
U2 8
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2161
EP 2164
DI 10.1103/PhysRevLett.76.2161
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400044
ER
PT J
AU Sternlieb, BJ
Hill, JP
Wildgruber, UC
Luke, GM
Nachumi, B
Moritomo, Y
Tokura, Y
AF Sternlieb, BJ
Hill, JP
Wildgruber, UC
Luke, GM
Nachumi, B
Moritomo, Y
Tokura, Y
TI Charge and magnetic order in La0.5Sr1.5MnO4
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
AB Elastic neutron scattering measurements characterizing the charge and magnetic order in La0.5Sr1.5MnO4 are presented. Superlattice reflections corresponding to an alternating Mn+3/Mn+4 pattern with wave vector q(co) = (1/2, 1/2, 0) are observed below the charge ordering temperature, T-co 217 K. Below the Neel temperature, T-N approximate to 110 K, the magnetic moments associated with these ions form an ordered structure with dimensions 2 root 2a x 2 root 2a X 2c relative to the underlying chemical cell.
C1 COLUMBIA UNIV,DEPT PHYS,NEW YORK,NY 10027.
JOINT RES CTR ATOM TECHNOL,TSUKUBA,IBARAKI 305,JAPAN.
RP Sternlieb, BJ (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA.
RI Tokura, Yoshinori/C-7352-2009; Hill, John/F-6549-2011; Luke,
Graeme/A-9094-2010;
OI Luke, Graeme/0000-0003-4762-1173; moritomo, yutaka/0000-0001-6584-7489
NR 11
TC 274
Z9 276
U1 1
U2 10
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2169
EP 2172
DI 10.1103/PhysRevLett.76.2169
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400046
ER
PT J
AU Shumlak, U
Hartman, CW
AF Shumlak, U
Hartman, CW
TI Sheared flow stabilization of the m=1 kink mode in Z pinches - Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
RP Shumlak, U (reprint author), PHILIPS LABS,HIGH ENERGY PLASMA DIV,KIRTLAND AFB,NM 87117, USA.
OI Shumlak, Uri/0000-0002-2918-5446
NR 2
TC 5
Z9 5
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 18
PY 1996
VL 76
IS 12
BP 2199
EP 2199
DI 10.1103/PhysRevLett.76.2199
PG 1
WC Physics, Multidisciplinary
SC Physics
GA TZ984
UT WOS:A1996TZ98400056
ER
PT J
AU Friedberg, R
Lee, TD
Pang, Y
Ren, HC
AF Friedberg, R
Lee, TD
Pang, Y
Ren, HC
TI A soluble gauge model with Gribov-type copies
SO ANNALS OF PHYSICS
LA English
DT Article
ID PATH INTEGRALS
AB A soluble gauge model is presented which can exhibit the typical characteristics of Gribov's gauge-equivalent copies that exist in the Coulomb gauge of QCD. From the explicit solutions of the model, we show that correct results can be obtained by including all such copies, both in the Hamiltonian approach using Schrodinger wave functions and in the path-integration formalism using Feynman rules. This leads to an alternative proposal on how to resolve the complications of gauge-equivalent copies different From the one suggested by Gribov. (C) 1996 Academic Press, Inc.
C1 BROOKHAVEN NATL LAB,UPTON,NY 11973.
ROCKEFELLER UNIV,NEW YORK,NY 10021.
RP Friedberg, R (reprint author), COLUMBIA UNIV,NEW YORK,NY 10027, USA.
NR 20
TC 35
Z9 35
U1 0
U2 0
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 0003-4916
J9 ANN PHYS-NEW YORK
JI Ann. Phys.
PD MAR 15
PY 1996
VL 246
IS 2
BP 381
EP 445
DI 10.1006/aphy.1996.0032
PG 65
WC Physics, Multidisciplinary
SC Physics
GA TZ746
UT WOS:A1996TZ74600006
ER
PT J
AU Rodriguez, JA
Kuhn, M
Hrbek, J
AF Rodriguez, JA
Kuhn, M
Hrbek, J
TI The bonding of sulfur to a Pt(111) surface: Photoemission and molecular
orbital studies
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID CO-ADSORPTION; PT(100); METALS; LEED
AB The electronic properties of S/Pt(111) surfaces have been investigated using high-resolution photoemission spectroscopy with synchrotron radiation, and ab initio self-consistent-field calculations. The formation of S-Pt(111) bonds leads to a large decrease in the density of 5d states that the metal atoms exhibit around the Fermi level of the surface. This reduces the chemical reactivity of Pt. On Pt(111), S is bonded to two dissimilar adsorption sites (hollow and probably bridge) that show well separated S 2p binding energies and different bonding interactions. These states desorb from the surface following distinct reaction pathways.
RP Rodriguez, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA.
RI Hrbek, Jan/I-1020-2013
NR 34
TC 63
Z9 64
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD MAR 15
PY 1996
VL 251
IS 1-2
BP 13
EP 19
DI 10.1016/0009-2614(96)00066-8
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UD419
UT WOS:A1996UD41900003
ER
PT J
AU Prausnitz, JM
AF Prausnitz, JM
TI Molecular thermodynamics: Opportunities and responsibilities
SO FLUID PHASE EQUILIBRIA
LA English
DT Article; Proceedings Paper
CT 7th International Conference on Fluid Properties and Phase Equilibria
for Chemical Process Design
CY JUN 18-23, 1995
CL SNOWMASS VILLAGE, CO
SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE
ID LIQUID LIQUID EQUILIBRIA; SODIUM-SULFATE; NORMAL-ALKANES; EQUATION;
SYSTEMS; FLUIDS; STATE; MODEL
AB In chemical engineering, most applications of molecular thermodynamics have been based on various forms of the van der Waals theory of fluids augmented by chemical equilibria and by concepts from other, by-now classical theoretical concepts such as the Flory-Huggins model for polymers and the Debye-Huckel theory for electrolyte solutions. ''Extended'' van der Waals theory remains a promising method for contributing to the solution of contemporary engineering problems. While modern developments in the theory of fluids are impressive, as yet, they have had only limited impact on engineering practice, in part, because of the widening communication gap between those who do statistical mechanics and those who design and develop chemical processes and products. To realize the large potential utility of molecular thermodynamics, both classical and modern, researchers must not only exhibit more willingness to reduce their work to practice but also to exhibit multidimensionality, i.e., to relate molecular thermodynamics to other chemical engineering disciplines such as mass and heat transfer, nucleation and chemical kinetics. While the future success of molecular thermodynamics will be enhanced by progress in its own narrow domain, the promising possibilities of applied molecular thermodynamics depend crucially on its integration within the wider domain of chemical technology.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720.
RP Prausnitz, JM (reprint author), UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720, USA.
NR 21
TC 4
Z9 4
U1 2
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3812
J9 FLUID PHASE EQUILIBR
JI Fluid Phase Equilib.
PD MAR 15
PY 1996
VL 116
IS 1-2
BP 12
EP 26
DI 10.1016/0378-3812(95)02868-4
PG 15
WC Thermodynamics; Chemistry, Physical; Engineering, Chemical
SC Thermodynamics; Chemistry; Engineering
GA UK512
UT WOS:A1996UK51200003
ER
PT J
AU Shah, VM
Lin, YL
Bienkowski, PR
Cochran, HD
AF Shah, VM
Lin, YL
Bienkowski, PR
Cochran, HD
TI A generalized quartic equation of state
SO FLUID PHASE EQUILIBRIA
LA English
DT Article; Proceedings Paper
CT 7th International Conference on Fluid Properties and Phase Equilibria
for Chemical Process Design
CY JUN 18-23, 1995
CL SNOWMASS VILLAGE, CO
SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE
ID HARD CHAIN EQUATION; FLUIDS
AB A generalized quartic equation of state has been developed for nonpolar and polar fluids. The quartic equation of state needs only four fluid properties to predict physical and thermodynamic properties over a wide range of temperatures and pressures. These four properties are critical volume, critical temperature, acentric factor and dipole moment. The new equation of state models the repulsive forces between molecules correctly, unlike the cubic equations of state. One of the four roots obtained by solving the equation of state is always negative, making it possible to identify the remaining three roots like the roots of a cubic equation. The quartic equation of state shows superior performance compared with the Peng-Robinson equation of state.
C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
RP Shah, VM (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,419 DOUGHERTY BLDG,KNOXVILLE,TN 37996, USA.
NR 12
TC 3
Z9 3
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3812
J9 FLUID PHASE EQUILIBR
JI Fluid Phase Equilib.
PD MAR 15
PY 1996
VL 116
IS 1-2
BP 87
EP 93
DI 10.1016/0378-3812(95)02875-7
PG 7
WC Thermodynamics; Chemistry, Physical; Engineering, Chemical
SC Thermodynamics; Chemistry; Engineering
GA UK512
UT WOS:A1996UK51200010
ER
PT J
AU Kuehner, DE
Blanch, HW
Prausnitz, JM
AF Kuehner, DE
Blanch, HW
Prausnitz, JM
TI Salt-induced protein precipitation: Phase equilibria from an equation of
state
SO FLUID PHASE EQUILIBRIA
LA English
DT Article; Proceedings Paper
CT 7th International Conference on Fluid Properties and Phase Equilibria
for Chemical Process Design
CY JUN 18-23, 1995
CL SNOWMASS VILLAGE, CO
SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE
ID NONIONIC POLYMER
AB A molecular-thermodynamic model is developed for salt-induced protein precipitation. The model considers an aqueous solution of a globular protein as a system of interacting hard spheres in a continuum pseudo-solvent (water and salt ions). The protein molecules are considered to interact in a manner described by a set of spherically-symmetric two-body potentials of mean force. These include screened Coulombic repulsion, dispersion (van der Waals) attraction, osmotic attraction, and an attractive square-well potential intended to model specific protein-protein chemical interactions (including the hydrophobic effect and protein self-associations), Following Chiew et al. (1995), an analytical equation of state is derived using the Random Phase Approximation with the hard-sphere fluid as the reference system and a perturbation based on the protein-protein overall potential of mean force. This equation of state provides an expression for the chemical potential of the protein and determines liquid-liquid equilibria. The model is generalized for co-precipitation of several proteins. Experimental single-protein precipitation data are correlated for hen egg-white lysozyme and for alpha-chymotrypsin in concentrated aqueous solutions of ammonium sulfate.
C1 UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720.
NR 29
TC 42
Z9 43
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3812
J9 FLUID PHASE EQUILIBR
JI Fluid Phase Equilib.
PD MAR 15
PY 1996
VL 116
IS 1-2
BP 140
EP 147
DI 10.1016/0378-3812(95)02882-X
PG 8
WC Thermodynamics; Chemistry, Physical; Engineering, Chemical
SC Thermodynamics; Chemistry; Engineering
GA UK512
UT WOS:A1996UK51200017
ER
PT J
AU Cummings, PT
AF Cummings, PT
TI Molecular dynamics simulation of realistic systems
SO FLUID PHASE EQUILIBRIA
LA English
DT Article; Proceedings Paper
CT 7th International Conference on Fluid Properties and Phase Equilibria
for Chemical Process Design
CY JUN 18-23, 1995
CL SNOWMASS VILLAGE, CO
SP Colorado Sch Mines, NIST, Natl Sci Fdn, US DOE
ID VAPOR COEXISTENCE CURVE; SHEAR VISCOSITY; SUPERCRITICAL MIXTURES;
COMPUTER-SIMULATION; CARBON-DIOXIDE; N-ALKANES; PHASE COEXISTENCE;
AQUEOUS-SOLUTIONS; CRITICAL-BEHAVIOR; LIQUID RUBIDIUM
AB Molecular dynamics simulation is a powerful tool for understanding and predicting thermophysical properties in systems both at equilibrium and away from equilibrium and composed of molecules ranging in complexity from spherically symmetric monatomic molecules to polymers. The widespread utilization of low-cost high performance engineering workstations has permitted the application of molecular dynamics and Monte Carlo simulation techniques to proliferate at an astounding rate. High-performance massively-parallel supercomputers (such as the Intel Paragon and IBM SP/2) permit the simulation of systems with an unprecedented degree of complexity. As computing costs continue to decline, molecular simulation of systems modeled to a high degree of accuracy promises to become an equal partner with experiment for the prediction of thermophysical properties for industrial purposes. Several examples of the use of molecular dynamics simulation to predict the properties of highly realistic systems are described.
C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831.
RP Cummings, PT (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,419 DOUGHERTY ENGN BLDG,KNOXVILLE,TN 37996, USA.
RI Cummings, Peter/B-8762-2013
OI Cummings, Peter/0000-0002-9766-2216
NR 76
TC 8
Z9 8
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0378-3812
J9 FLUID PHASE EQUILIBR
JI Fluid Phase Equilib.
PD MAR 15
PY 1996
VL 116
IS 1-2
BP 237
EP 248
DI 10.1016/0378-3812(95)02892-7
PG 12
WC Thermodynamics; Chemistry, Physical; Engineering, Chemical
SC Thermodynamics; Chemistry; Engineering
GA UK512
UT WOS:A1996UK51200028
ER
PT J
AU Mullica, DF
Sappenfield, EL
Boatner, LA
AF Mullica, DF
Sappenfield, EL
Boatner, LA
TI Monazite- and zircon-type structures of seven mixed(Ln/Ln)PO4 compounds
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE crystal structures; lanthanide complexes; mixed complexes; phosphate
complexes
AB The (1:1) compound ortho-phosphates (Ce/Tb), (Nd/Tb) and (Sm/Tb) crystallize in the monoclinic system conforming to space group P2(1)/n (No. 14), and the lanthanide metal atoms are nine-coordinated to oxygen atoms forming a polyhedron that is best described as a pentagonal interpenetrating tetrahedron. The (1:1) compound ortho-phosphates (Nd/Er), (Sm/Er), (Sm/Yb) and (Sm/Lu) crystallize in the tetragonal system (space group I4(1)/amd (No. 141)), and the metal atoms are eight-coordinated forming two orthogonal interpenetrating tetrahedra, a bis-bisphenoidal geometry. The phosphate group in each compound investigated is a distorted tetrahedron. Single-crystal structural analyses have been carried out for the seven indicated mixed (Ln/Ln) PO4 ortho-phosphates and coordination geometries have been determined by means of automated three-dimensional single-crystal diffractometry and full-matrix least-squares refinements. Important bond distances and angles, experimental summaries and ORTEP-II drawings related to the geometries are presented.
C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831.
RP Mullica, DF (reprint author), BAYLOR UNIV,DEPT CHEM,POB 97348,WACO,TX 76798, USA.
RI Boatner, Lynn/I-6428-2013
OI Boatner, Lynn/0000-0002-0235-7594
NR 25
TC 19
Z9 21
U1 0
U2 4
PU ELSEVIER SCIENCE SA LAUSANNE
PI LAUSANNE 1
PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND
SN 0020-1693
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD MAR 15
PY 1996
VL 244
IS 2
BP 247
EP 252
DI 10.1016/0020-1693(95)04783-2
PG 6
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA UF701
UT WOS:A1996UF70100015
ER
PT J
AU Clark, DL
Gordon, JC
McFarlan, JT
VincentHollis, RL
Watkin, JG
Zwick, BD
AF Clark, DL
Gordon, JC
McFarlan, JT
VincentHollis, RL
Watkin, JG
Zwick, BD
TI Crystal structure of the zerovalent niobium complex
Nb(eta-C(6)H(5)Me)(2)
SO INORGANICA CHIMICA ACTA
LA English
DT Article
DE crystal structures; niobium complexes; zerovalent complexes; toluene
complexes
ID ELECTRON-TRANSFER COMPLEXES; MOLECULAR-STRUCTURE; REACTIVITY;
ALCL4; V(ETA-6-1,3,5-ME3C6H3)2; REDUCTION
AB The crystal structure of Nb(eta-C(6)H(5)Me)(2) (1), prepared by co-condensation of niobium metal atoms with toluene vapor, has been determined. The toluene rings lie parallel to one another one another on either side of the niobium metal center (Nb=C=2.334(5) Angstrom av.), with methyl groups almost perfectly eclipsed. Crystal data for 1 (At -50 degrees C): orthorhombic, space group Pbcn, a=13.706(3),b=11.977(2), c=13.753(3) Angstrom,V=2257.6 Angstrom(3),D-calc=16.31 g cm(-3),Z=8,R=0.0421,R(w)=0.0612.
C1 LOS ALAMOS NATL LAB,DIV NUCL MAT TECHNOL,LOS ALAMOS,NM 87545.
RP Clark, DL (reprint author), LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,MAIL STOP G739,LOS ALAMOS,NM 87545, USA.
RI Clark, David/A-9729-2011
NR 31
TC 8
Z9 8
U1 0
U2 1
PU ELSEVIER SCIENCE SA LAUSANNE
PI LAUSANNE 1
PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND
SN 0020-1693
J9 INORG CHIM ACTA
JI Inorg. Chim. Acta
PD MAR 15
PY 1996
VL 244
IS 2
BP 269
EP 272
DI 10.1016/0020-1693(95)04776-X
PG 4
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA UF701
UT WOS:A1996UF70100020
ER
PT J
AU Goulding, RH
Zinkle, SJ
Rasmussen, DA
Stoller, RE
AF Goulding, RH
Zinkle, SJ
Rasmussen, DA
Stoller, RE
TI Transient effects of ionizing and displacive radiation on the dielectric
properties of ceramics
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ELECTRICAL-CONDUCTIVITY; IRRADIATION; ALUMINA; MGAL2O4; AL2O3
AB A resonant cavity technique was used to measure the dielectric constant and loss tangent of ceramic insulators at a frequency near 100 MHz juring pulsed fission reactor irradiation near room temperature. Tests were performed on single crystal and several different grades of polycrystalline Al2O3, MgAl2O4, AlN, and Si3N4. Lead shielding experiments were performed for some of the ii-radiations in order Co examine the importance of gamma ray versus neutron irradiation effects. With the exception of AlN, the dielectric constant of all of the ceramics decreased slightly (<0.2% change) during the pulsed fission reactor irradiation. The dielectric constant of AlN was observed to slightly increase during irradiation, Significant transient increases in the loss tangent to values as high as 6X10(-3) occurred during pulsed reactor irradiation with peak ionizing and displacements per atom (dpa) radiation fields of 4.2X10(4) Gy/s and 2.4X10(-6) dpa/s, respectively. The loss tangent measured during irradiation for the different ceramics did not show any correlation with the preirradiation or postirradiation values. Analysis of the results indicates that the transient increases in loss tangent are due to radiation induced increases in the electrical conductivity. The loss tan!ent increases were proportional to the ionizing dose rate in all materials except for AlN, which exhibited a dose rate exponent of similar to 1.6. (C) 1996 American Institute of Physics.
C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831.
RP Goulding, RH (reprint author), OAK RIDGE NATL LAB,DIV FUS ENERGY,POB 2009,OAK RIDGE,TN 37831, USA.
RI Stoller, Roger/H-4454-2011; Goulding, Richard/C-5982-2016;
OI Goulding, Richard/0000-0002-1776-7983; Zinkle,
Steven/0000-0003-2890-6915
NR 41
TC 23
Z9 23
U1 0
U2 5
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 15
PY 1996
VL 79
IS 6
BP 2920
EP 2933
DI 10.1063/1.361288
PG 14
WC Physics, Applied
SC Physics
GA TZ729
UT WOS:A1996TZ72900018
ER
PT J
AU Thurston, TR
Wildgruber, U
Jisrawi, N
Haldar, P
Suenaga, M
Wang, YL
AF Thurston, TR
Wildgruber, U
Jisrawi, N
Haldar, P
Suenaga, M
Wang, YL
TI Synchrotron x-ray scattering measurements of bulk structural properties
in superconducting (Bi,Pb)(2)Sr2Ca2Cu3O10-Ag tapes
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID WIRES
AB The structural properties of superconducting (Bi,Pb)(2)Sr2Ca2Cu3O10-Ag (2223) tapes have been measured using synchrotron x-ray scattering techniques. The x-ray photon energy was tuned just below the silver K absorption edge so the penetration depth was large, which allowed the measurements to be performed in a transmission geometry without removing the silver cladding. Analysis of the peaks in 2 theta scans indicates that residual (Bi,Pb)(2)Sr2CaCu2O8 (2212) superconductor starting material is present in all samples studied. The amount of 2212 varied widely among the tapes, and was not homogeneous along the length of each individual tape. Residual 2212 content increased near the ends of most samples, suggesting that 2223 phase development is sensitive to whether the superconducting material is encased in silver or not. The bulk c-axis alignment was measured in similar to 100 mono- and multifilament samples, and correlations between c-axis alignment and current carrying capacity at 77 K were found. Multifilament samples generally had better alignment than monofilament samples. The c-axis alignment along the length of the tapes was uniform, and the superconducting material within similar to 1 mu m of the Ag was better textured than the bulk of the sample. Intermediate pressings were directly shown to have an adverse affect on c-axis alignment. Finally, the evolution of texture and phase development was examined in a series of samples annealed for varying times. The 2212 starting material acquired the final c-axis alignment state after brief heating times, and only after much longer heating times did the 2212 transform into the 2223 phase. These results and their implications for improving processing procedures are discussed. (C) 1996 American Institute of Physics.
C1 INTERMAGNET GEN CORP,LATHAM,NY 12110.
BROOKHAVEN NATL LAB,DEPT APPL PHYS,UPTON,NY 11973.
BIRZEIT UNIV,DEPT PHYS,BIRZEIT,JORDAN.
RP Thurston, TR (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA.
NR 9
TC 52
Z9 52
U1 0
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 15
PY 1996
VL 79
IS 6
BP 3122
EP 3132
DI 10.1063/1.362695
PG 11
WC Physics, Applied
SC Physics
GA TZ729
UT WOS:A1996TZ72900046
ER
PT J
AU Yang, ZJ
Hull, JR
AF Yang, ZJ
Hull, JR
TI Effect of size on levitation force in a magnet/superconductor system
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNET; PLANE
AB We consider a model system consisting of an infinitely long magnetic dipole line placed symmetrically above an infinitely long superconducting strip. Using the Meissner effect of superconductors, we derive analytical expressions of the levitation forces acting on the dipole line. At lowest-order approximation, we discuss the possible application of our model system to estimate the upper limit of the levitation forces in some magnetic bearing systems. In one example, the model correctly calculated the vertical vibration frequency of an experimental superconducting bearing.
RP Yang, ZJ (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA.
NR 20
TC 15
Z9 15
U1 1
U2 4
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 15
PY 1996
VL 79
IS 6
BP 3318
EP 3322
DI 10.1063/1.361232
PG 5
WC Physics, Applied
SC Physics
GA TZ729
UT WOS:A1996TZ72900077
ER
PT J
AU Polian, A
Grimsditch, M
Grzegory, I
AF Polian, A
Grimsditch, M
Grzegory, I
TI Elastic constants of gallium nitride
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID HIGH-PRESSURE; SPECTROSCOPY
AB The elastic constants of GaN have been determined using Brillouin scattering; in GPa they are: C-11 = 390, C-33 = 398, C-44 = 105, C-66 = 123, C-12 = 145, and C-13 = 106. Our values differ substantially from those quoted in the literature which were obtained from the determination of mean square displacement of atoms measured by x-ray diffraction. (C) 1996 American Institute of Physics.
C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439.
POLISH ACAD SCI,UNIPRESS,PL-01142 WARSAW,POLAND.
RP Polian, A (reprint author), UNIV PARIS 06,4 PL JUSSIEU,F-75252 PARIS 05,FRANCE.
RI Polian, Alain/E-1555-2017
OI Polian, Alain/0000-0003-2261-9114
NR 18
TC 414
Z9 420
U1 3
U2 41
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 15
PY 1996
VL 79
IS 6
BP 3343
EP 3344
DI 10.1063/1.361236
PG 2
WC Physics, Applied
SC Physics
GA TZ729
UT WOS:A1996TZ72900082
ER
PT J
AU Gong, EL
Stoltzfus, LJ
Brion, CM
Murugesh, D
Rubin, EM
AF Gong, EL
Stoltzfus, LJ
Brion, CM
Murugesh, D
Rubin, EM
TI Contrasting in vivo effects of murine and human apolipoprotein A-II -
Role of monomer versus dimer
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID DENSITY-LIPOPROTEIN SIZE; TRANSGENIC MICE; EXPRESSION
AB The role of apolipoprotein A-II (apoA-II) in high density lipoprotein (HDL) structure and metabolism has been studied previously in transgenic mice overexpressing either human or murine apoA-II. These studies have shown differences between these two groups of transgenic animals in the levels of very low density, low density, and high density lipoproteins, in the HDL particle size distribution, and in the relationship between apoA-II levels and lipoprotein levels. To determine whether these differences are due to the fact that human apoA-II is dimeric and murine apoA-II monomeric, me have examined the effects of monomeric human apoA-II (hA-IImon) in transgenic mice. Site-directed mutagenesis (Cys(6)-->Ser) was used to generate 15 transgenic founder lines of hA-IImon mice, that contained plasma hA-IImon concentrations over a 10-fold range (11 mg/dl to 185 mg/dl). The hA-IImon floated in the d less than or equal to 1.21 g/ml fraction and migrated as an apoA-II monomer by nonreducing SDS-polyacrylamide gel electrophoresis. HDL levels were not correlated with hA-IImon levels (r = 0.26); HDL particle size and size distribution, as well as very low density and low density lipoprotein levels and sizes, were unchanged compared to nontransgenic control mice. These results suggest that differences between mice overexpressing human dimeric apoA-II and those overexpressing murine apoA-II are the result of sequence differences between these two apoA-II: molecules and are not solely due to the fact that human apoA-II exists as a dimer.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR HUMAN GENOME,BERKELEY,CA 94720.
FU NHLBI NIH HHS [PPG HL18574, HL46281-04]
NR 13
TC 20
Z9 20
U1 2
U2 2
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD MAR 15
PY 1996
VL 271
IS 11
BP 5984
EP 5987
PG 4
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA UA363
UT WOS:A1996UA36300009
PM 8626380
ER
PT J
AU Brandes, HK
Hartman, FC
Lu, TYS
Larimer, FW
AF Brandes, HK
Hartman, FC
Lu, TYS
Larimer, FW
TI Efficient expression of the gene for spinach phosphoribulokinase in
Pichia pastoris and utilization of the recombinant enzyme to explore the
role of regulatory cysteinyl residues by site-directed mutagenesis
SO JOURNAL OF BIOLOGICAL CHEMISTRY
LA English
DT Article
ID LEAF RIBULOSE-5-PHOSPHATE KINASE; YEAST 3-PHOSPHOGLYCERATE KINASE;
ESCHERICHIA-COLI; PHOSPHOGLYCERATE KINASE; CO2 ASSIMILATION;
ACTIVE-SITE; SULFATE ION; BINDING; PURIFICATION; SEQUENCE
AB Phosphoribulokinase (PRK), unique to photosynthetic organisms, is regulated in higher plants by thioredoxin-mediated thiol-disulfide exchange in a light-dependent manner. Prior attempts to overexpress the higher plant PRK gene in Escherichia coli for structure-function studies have been hampered by sensitivity of the recombinant protein to proteolysis as well as toxic effects of the protein on the host. To overcome these impediments, we have spliced the spinach PRK coding sequence immediately downstream from the AOX1 (alcohol oxidase) promoter of Pichia pastoris, displacing the chromosomal AOX1 gene. The PRK gene is now expressed, in response to methanol, at 4-6% of total soluble protein, without significant in vivo degradation of the recombinant enzyme. This recombinant spinach PRK is purified to homogeneity by successive anion-exchange and dye-affinity chromatography and is shown to be electrophoretically and kinetically indistinguishable from the authentic spinach counterpart. Site-specific replacement of all of PRK's cysteinyl residues (both individually and in combination) demonstrates a modest catalytically facilitative role for Cys-55 (one of the regulatory residues) and the lack of any catalytic role for Cys-16 (the other regulatory residue), Cys-244, or Cys-250. Mutants with seryl substitutions at position 55 display non-hyperbolic kinetics relative to the concentration of ribulose 5-phosphate. Sulfate restores hyperbolic kinetics and enhances kinase activity, presumably reflecting conformational differences between the position 55 mutants and wild-type enzyme. Catalytic competence of the C16S-C55S double mutant proves that mere loss of free sulfhydryl groups by oxidative regulation cannot account entirely for the accompanying total inactivation.
C1 OAK RIDGE NATL LAB,DIV BIOL,PROT ENGN PROGRAM,OAK RIDGE,TN 37831.
UNIV TENNESSEE,OAK RIDGE GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831.
NR 35
TC 28
Z9 31
U1 1
U2 5
PU AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3996 USA
SN 0021-9258
J9 J BIOL CHEM
JI J. Biol. Chem.
PD MAR 15
PY 1996
VL 271
IS 11
BP 6490
EP 6496
PG 7
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA UA363
UT WOS:A1996UA36300080
PM 8626451
ER
PT J
AU West, JB
Hayes, MA
Siggel, MRF
Dehmer, JL
Dehmer, PM
Parr, AC
Hardis, JE
AF West, JB
Hayes, MA
Siggel, MRF
Dehmer, JL
Dehmer, PM
Parr, AC
Hardis, JE
TI Vibrationally resolved photoelectron angular distributions and branching
ratios for the carbon dioxide molecule in the wavelength region 685-795
angstrom
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID EMISSION-SPECTRUM; BAND SYSTEM; RESONANCES; CO2; PHOTOIONIZATION;
AUTOIONIZATION; EXCITATION; IONIZATION; RADIATION; XENON
AB Measurements of vibrational branching ratios and photoelectron angular distributions have been made in the regions of the Tanaka-Ogawa, Lindholm, and Henning series for the CO2 molecule. The behavior of these parameters was found to be sensitive to which particular resonance is excited, with considerable intensity going into vibrational modes other than the symmetric stretch. An initial analysis of some of the data taken is presented. (C) 1996 American Institute of Physics.
C1 ARGONNE NATL LAB,ARGONNE,IL.
NIST,GAITHERSBURG,MD 20899.
RP West, JB (reprint author), DARESBURY LAB,WARRINGTON WA4 4AD,CHESHIRE,ENGLAND.
NR 31
TC 10
Z9 10
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 15
PY 1996
VL 104
IS 11
BP 3923
EP 3934
DI 10.1063/1.471249
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TY728
UT WOS:A1996TY72800007
ER
PT J
AU Williams, S
Rahn, LA
Zare, RN
AF Williams, S
Rahn, LA
Zare, RN
TI Effects of different population, orientation, and alignment relaxation
rates in resonant four-wave mixing
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID TRANSIENT GRATING EXPERIMENTS; LASER-INDUCED GRATINGS; 4-WAVE-MIXING
SPECTROSCOPY; DECOMPOSITION METHOD; ANGULAR-DEPENDENCE; FREE JETS; OH;
FLAME; FLUORESCENCE; TRANSITIONS
AB We present a combined theoretical and experimental study on the effects of different population, orientation, and alignment relaxation rates in resonant four-wave mixing (RFWM). Signal generation in RFWM can be viewed as the formation of and scattering from laser-induced population, orientation, and alignment gratings. We show that the relative contributions from the upper-state and lower-state population, orientation, and alignment gratings to the observed output signal can be changed by varying the polarizations of the three input fields. A theory is developed to account for these changes in collisional environments where the three multipole moments of the total angular momentum distribution, i.e., the population, the orientation, and the alignment, relax unequally. This theory is applied to the OH radical in an atmospheric-pressure H-2/O-2/He flame for which we have measured the line profiles using high-resolution degenerate and nearly degenerate four-wave mixing. We find that orientation and alignment gratings relax more rapidly than population gratings for low rotational levels of OH in the presence of He but at essentially the same rate for high rotational levels. A discussion is presented of the importance of this effect in the interpretation of RFWM experiments. (C) 1996 American Institute of Physics.
C1 SANDIA NATL LABS,COMBUST RES FACIL MS 9051,LIVERMORE,CA 94551.
STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305.
RI Zare, Richard/A-8410-2009;
OI Rahn, Larry/0000-0002-4793-1158
NR 65
TC 50
Z9 50
U1 0
U2 1
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 15
PY 1996
VL 104
IS 11
BP 3947
EP 3955
DI 10.1063/1.471250
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TY728
UT WOS:A1996TY72800009
ER
PT J
AU Heck, AJR
Zare, RN
Chandler, DW
AF Heck, AJR
Zare, RN
Chandler, DW
TI Photofragment imaging of methane
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID EXCITATION; ABINITIO; CH4; H2; D2; CH2(1A1)+H2->CH4; FLUORESCENCE;
RADIATION; CHANNELS; STATE
AB The photolysis of methane is studied using photofragment imaging techniques. Our study reveals that the photolysis of methane proceeds via many different pathways. The photofragment imaging technique is used to resolve and characterize these various pathways and provides therefore unique insight into the dynamical processes that govern this photodissociation. The formation of H-atom photofragments following absorption of a Lyman-alpha photon, and H-2 photofragments following absorption of two ultraviolet photons (lambda=210-230 nm) are studied. The measured H-atom photofragment images reveal that a channel that produces fast H atoms concomitant with methyl fragments is dominant in the Lyman-alpha photolysis of methane. This channel leads to an anisotropic recoil of the fragments. A secondary channel is observed leading to the formation of somewhat slower H atoms, but an unique identification of this second channel is not possible from the data. At least part of these slower H atoms are formed via a channel that produces H atoms concomitant with CH and H-2 photofragments. The recoil of these slower H atoms appears to be isotropic. The measured, state-resolved H-2(v,J), photofragment images reveal that two channels lead to H-2 photofragments from the two-photon photolysis of methane: a channel that leads to H-2 products concomitant with methylene fragments; and a channel that leads to H-2 products concomitant with CH and H fragments. H-2(v,J) rotational and vibrational distributions are measured for each of these two channels separately, The H-2 products formed via the H-2+CH2 channel are rotationally and vibrationally highly excited, whereas those formed via the H-2+CH+H channel are rotationally and vibrationally cooler. Rotational distributions of H-2 formed via the H-2+CH+H channel are well reproduced by Boltzmann distributions. Results on D-2 elimination following two-photon photolysis. of CD4 are in general similar and in qualitative agreement with the results on CH4. (C) 1996 American Institute of Physics.
C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305.
RP Heck, AJR (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA.
RI Zare, Richard/A-8410-2009; Heck, Albert/D-7098-2011
OI Heck, Albert/0000-0002-2405-4404
NR 36
TC 56
Z9 56
U1 3
U2 10
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 15
PY 1996
VL 104
IS 11
BP 4019
EP 4030
DI 10.1063/1.471214
PG 12
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TY728
UT WOS:A1996TY72800017
ER
PT J
AU Wang, HY
LeSar, R
AF Wang, HY
LeSar, R
TI An efficient fast-multipole algorithm based on an expansion in the solid
harmonics
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID PARTICLE SIMULATIONS
AB We present an efficient variant of the fast-multipole method for calculating long-range interactions in three-dimensional Coulombic systems. Using a multipole expansion based on the solid harmonics instead of the more common spherical harmonics leads to a greater increase in computational efficiency than a recently-reported fast-Fourier transform method, with none of the overhead associated with that approach. (C) 1996 American Institute of Physics.
RP Wang, HY (reprint author), UNIV CALIF LOS ALAMOS NATL LAB,CTR MAT SCI,LOS ALAMOS,NM 87545, USA.
RI LeSar, Richard/G-1609-2012
NR 19
TC 20
Z9 20
U1 2
U2 9
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 15
PY 1996
VL 104
IS 11
BP 4173
EP 4179
DI 10.1063/1.471667
PG 7
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TY728
UT WOS:A1996TY72800034
ER
PT J
AU Vu, HX
AF Vu, HX
TI An adiabatic fluid electron particle-in-cell code for simulating
ion-driven parametric instabilities
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
ID ELECTROMAGNETIC PLASMA SIMULATION; IMPLICIT; SHOCKS; MODEL
AB A hybrid particle-in-cell (PIC) method is presented in which the electrons are modeled as an adiabatic fluid with an arbitrary ratio of specific heats gamma. The electromagnetic field model is based on a temporal Wentzel-Krammers-Brillouin approximation. The method is a new tool for simulating ion-driven parametric instabilities which often exist in laser-produced plasmas. The method is general and does not depend on the number of spatial dimensions. The method will model the plasma behavior correctly even in situations where the electron Debye shielding is not negligible. Test simulations of ion Landau damping in both one and two dimensions are performed, and the results are in excellent agreement with linear Vlasov theory. Test simulations of stimulated Brillouin scattering (SBS) in one and two dimensions are performed, and the results indicate that when the intensity of the driving electromagnetic field is sufficiently high, backscatter SBS is dominant at early time while side-scatter SBS is dominant at late time. For the test cases in which a high-frequency driving electromagnetic field is present, our hybrid PIC method offers a substantial saving in computational time over explicit PIC methods that require the time scale of the driving electromagnetic field to be resolved. (C) 1996 Academic Press, Inc.
RP Vu, HX (reprint author), LOS ALAMOS NATL LAB,APPL THEORET & COMPUTAT DIV,LOS ALAMOS,NM 87545, USA.
NR 30
TC 16
Z9 16
U1 0
U2 2
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAR 15
PY 1996
VL 124
IS 2
BP 417
EP 430
DI 10.1006/jcph.1996.0069
PG 14
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA UC248
UT WOS:A1996UC24800013
ER
PT J
AU Nilsen, J
Fiedorowicz, H
Bartnik, A
Li, YL
Lu, PX
Fill, EE
AF Nilsen, J
Fiedorowicz, H
Bartnik, A
Li, YL
Lu, PX
Fill, EE
TI Self-photopumped neonlike x-ray laser
SO OPTICS LETTERS
LA English
DT Article
ID BEAM-FOIL; CONFIGURATIONS
AB We propose a new x-ray laser mechanism that uses radiation from the strongest 3d --> 2p Ne-like resonance line in an optically thick plasma to radiatively drive population from the Ne-like ground state to the 3d state, which then lases to two 3p states. Collisional mixing of the 3p states with nearby 3s and 3d states depopulates the lower laser states. Modeling is presented for this mechanism in Ne-like Ar, and in experiments we observe one potential 3d --> 3p lasing transition at 45.1 nm in Ne-like Ar. (C) 1996 Optical Society of America
C1 MIL UNIV TECHNOL,INST OPTOELECTR,PL-01489 WARSAW,POLAND.
MAX PLANCK INST QUANTUM OPT,D-85748 GARCHING,GERMANY.
ACAD SINICA,SHANGHAI INST OPT & FINE MECH,SHANGHAI 201800,PEOPLES R CHINA.
RP Nilsen, J (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA.
OI Li, Yuelin/0000-0002-6229-7490
NR 13
TC 17
Z9 17
U1 0
U2 2
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD MAR 15
PY 1996
VL 21
IS 6
BP 408
EP 410
DI 10.1364/OL.21.000408
PG 3
WC Optics
SC Optics
GA TZ722
UT WOS:A1996TZ72200014
PM 19865421
ER
PT J
AU Cheriaux, G
Rousseau, P
Salin, F
Chambaret, JP
Walker, B
Dimauro, LF
AF Cheriaux, G
Rousseau, P
Salin, F
Chambaret, JP
Walker, B
Dimauro, LF
TI Aberration-free stretcher design for ultrashort-pulse amplification
SO OPTICS LETTERS
LA English
DT Article
ID UNIT MAGNIFICATION SYSTEM; OPTICAL PULSES
AB A novel aberration-free pulse stretcher design is presented. This system permits the stretching of a 30-fs pulse to 300 ps and recompression to a duration of 33 fs, limited by the spectral clipping. (C) 1996 Optical Society of America
C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973.
RP Cheriaux, G (reprint author), ECOLE POLYTECH,ECOLE NATL SUPER TECH AVANCEES,LAB OPT APPL,F-91120 PALAISEAU,FRANCE.
RI Walker, Barry/F-8532-2011
NR 11
TC 159
Z9 168
U1 3
U2 18
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD MAR 15
PY 1996
VL 21
IS 6
BP 414
EP 416
DI 10.1364/OL.21.000414
PG 3
WC Optics
SC Optics
GA TZ722
UT WOS:A1996TZ72200016
PM 19865423
ER
PT J
AU Hubbard, MA
Salamon, MB
Veal, BW
AF Hubbard, MA
Salamon, MB
Veal, BW
TI Fluctuation diamagnetism and mass anisotropy of YBa2Cu3O6+x
SO PHYSICA C
LA English
DT Article
ID II SUPERCONDUCTORS; CRITICAL-BEHAVIOR; HEAT-CAPACITY; YBA2CU3O7-DELTA;
TRANSPORT; CROSSOVER; DISORDER; TC
AB We have measured the fluctuation magnetization of large samples of YBa2CU3O6+x with a variety of oxygen concentrations. Magnetization is measured for several isotherms near T-c as a function of applied magnetic field parallel to the c-axis, in fields up to 7 T. The fluctuation magnetization data are consistent with the predictions of 3D-XY scaling over the full doping range studied, x = 0.7-0.9. Within the anisotropic-effective-mass model, scaling of the temperature and field dependence of the magnetization can be used to determine the mass anisotropy and also the separate variations of the in-plane and out-of-plane coherence lengths with doping level. We show that the increase of anisotropy with decreasing oxygen content is dominated by changes in xi(ab)(0), With little change in xi(c)(0).
C1 ARGONNE NATL LAB,ARGONNE,IL 60439.
RP Hubbard, MA (reprint author), UNIV ILLINOIS,DEPT PHYS,1110 W GREEN ST,URBANA,IL 61801, USA.
NR 19
TC 42
Z9 42
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0921-4534
J9 PHYSICA C
JI Physica C
PD MAR 15
PY 1996
VL 259
IS 3-4
BP 309
EP 320
DI 10.1016/0921-4534(96)80003-7
PG 12
WC Physics, Applied
SC Physics
GA UE662
UT WOS:A1996UE66200014
ER
PT J
AU deMelo, CARS
AF deMelo, CARS
TI Quantum limits on classical permanent memories
SO PHYSICAL REVIEW B
LA English
DT Article
ID PBTIO3 ULTRAFINE PARTICLES; PHASE-TRANSITION; MAGNETIZATION;
DISSIPATION; SIZE
AB At the mesoscopic level a single domain of a classical permanent memory may experience considerable quantum fluctuations due to tunneling between two possible memory states, thus destroying the classical permanent memory effect. To study these quantum effects, the concrete example of a mesoscopic uniaxial ferroelectric grain is discussed, where the orientation of the electric polarization determines two possible memory states. To determine the degree of memory loss, the tunneling rate between the two polarization states is calculated at zero temperature, both in the absence and in the presence of an external static electric field. Environmental effects (phonons, defects, and surfaces) are also considered.
RP deMelo, CARS (reprint author), ARGONNE NATL LAB,DIV MAT SCI,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 26
TC 0
Z9 0
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0163-1829
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 11
BP 6931
EP 6934
DI 10.1103/PhysRevB.53.6931
PG 4
WC Physics, Condensed Matter
SC Physics
GA UC740
UT WOS:A1996UC74000021
ER
PT J
AU Itoh, KM
Muto, J
Walukiewicz, W
Beeman, JW
Haller, EE
Kim, HJ
Mayur, AJ
Sciacca, MD
Ramdas, AK
Buczko, R
Farmer, JW
AF Itoh, KM
Muto, J
Walukiewicz, W
Beeman, JW
Haller, EE
Kim, HJ
Mayur, AJ
Sciacca, MD
Ramdas, AK
Buczko, R
Farmer, JW
TI Evidence for correlated hole distribution in neutron-transmutation-doped
isotopically controlled germanium
SO PHYSICAL REVIEW B
LA English
DT Article
ID COMPENSATED SEMICONDUCTORS; TEMPERATURE-DEPENDENCE; SPECTRAL-LINES;
DONORS; IMPURITIES; LINEWIDTHS; ABSORPTION; GAAS
AB We report on low-temperature infrared-absorption spectroscopy studies of compensated p-type Ge(Ga,As) samples with varying doping compensation ratios. Previous difficulties in preparing appropriate samples are overcome by neutron-transmutation doping of high-purity, isotopically controlled germanium composed exclusively of Ge-70 and Ge-74, viz. Ge-70(x) Ge-74(1-x). With this technique, we have produced a series of crystals with compensation ratios between 0.082 and 0.87, while maintaining the net-acceptor concentration [Ga]-[As] constant at 5 x 10(14) cm(-3). The observed excitation lines of Ga accepters broaden linearly with the ionized impurity concentration due to the quadrupole interactions between Ga bound holes and the electric-field gradient. Experimental linewidths are quantitatively compared with existing theories of electric-field broadening developed in the context of donor transitions. We find excellent agreement with the theory based on the correlated distribution of ionized impurity centers.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
PURDUE UNIV,W LAFAYETTE,IN 47907.
POLISH ACAD SCI,INST PHYS,PL-02668 WARSAW,POLAND.
UNIV MISSOURI,COLUMBIA,MO 65211.
IV KURCHATOV ATOM ENERGY INST,MOSCOW 123182,RUSSIA.
RP Itoh, KM (reprint author), KEIO UNIV,DEPT INSTRUMENTAT ENGN,KOHOKU KU,3-14-1 HIYOSHI,YOKOHAMA,KANAGAWA 223,JAPAN.
RI Itoh, Kohei/C-5738-2014
NR 33
TC 9
Z9 9
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0163-1829
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 12
BP 7797
EP 7804
DI 10.1103/PhysRevB.53.7797
PG 8
WC Physics, Condensed Matter
SC Physics
GA UC947
UT WOS:A1996UC94700038
ER
PT J
AU Wood, DM
Zunger, A
AF Wood, DM
Zunger, A
TI Successes and failures of the k center dot p method: A direct assessment
for GaAs/AlAs quantum structures
SO PHYSICAL REVIEW B
LA English
DT Article
ID ELECTRONIC-STRUCTURE; ENVELOPE FUNCTIONS; BAND-STRUCTURE; K.P THEORY;
SUPERLATTICES; HETEROSTRUCTURES; APPROXIMATION; FILMS; WELLS
AB The kp method combined with the envelope-function approximation is the tool most commonly used to predict electronic properties of semiconductor quantum wells and superlattices. We test this approach by comparing band energies, dispersion, and wave functions for GaAs/AlAs superlattices and quantum wells as computed directly from a pseudopotential band structure and using eight-band k . p. To assure equivalent inputs, all parameters needed for the k . p treatment are extracted from calculated bulk GaAs and AlAs pseudopotential band structures. Except for large exchange splittings in the in-plane dispersion for thin superlattices, present in pseudopotential calculations but absent from the k . p results, we find generally good agreement for heterostructure hole bands within similar to 200 meV of the GaAs valence-band maximum. There are systematic errors in band energies and dispersion for deeper hole bands (all other than hh1 and lh1) and significant qualitative and quantitative errors for the conduction bands. Errors for heterostructure conduction states which are derived from the zinc-blende Gamma point diminish as length scales increase beyond similar to 20 ML, while significant errors persist for L- and X-derived states. For bulk GaAs and AlAs, eight-band k . p bands agree well with pseudopotential results very near the zinc-blende Gamma point (where k . p parameters are fit) but the first GaAs X point conduction band is similar or equal to 26 eV too high with respect to the pseudopotential result. We show that this inadequate description of the bulk band dispersion is the principal source of kp errors in these heterostructures. A wave-function projection analysis shows that k . p errors for heterostructures simply reflect corresponding errors for the bulk constituents, weighted by the amount that such bulk states participate in heterostructure states.
RP NATL RENEWABLE ENERGY LAB, GOLDEN, CO 80401 USA.
RI Zunger, Alex/A-6733-2013
NR 43
TC 92
Z9 92
U1 0
U2 7
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 2469-9950
EI 2469-9969
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 12
BP 7949
EP 7963
DI 10.1103/PhysRevB.53.7949
PG 15
WC Physics, Condensed Matter
SC Physics
GA UC947
UT WOS:A1996UC94700062
ER
PT J
AU Wang, LS
Wu, HB
Desai, SR
Lou, L
AF Wang, LS
Wu, HB
Desai, SR
Lou, L
TI Electronic structure of small copper oxide clusters: From Cu2O to Cu2O4
SO PHYSICAL REVIEW B
LA English
DT Article
ID PHOTOELECTRON-SPECTROSCOPY; POLYATOMIC-MOLECULES; IONIZATION; IONS
AB We study the electronic structure of copper oxide clusters, Cu2Ox (x=1-4), using anion photoelectron spectroscopy and density-functional calculations. The experiment is used to successfully guide a computational search for the cluster geometries. The predicted electron affinities at the obtained cluster structures reproduce exactly the trend observed experimentally. The definitive determination of the cluster structures enables a detailed analysis of the chemical bonding and electronic structure involving Cu atoms in different oxidation states exhibited by these clusters.
C1 PACIFIC NW LAB, ENVIRONM MOL SCI LAB, RICHLAND, WA 99352 USA.
RICE UNIV, RICE QUANTUM INST, HOUSTON, TX 77251 USA.
RICE UNIV, DEPT CHEM, HOUSTON, TX 77251 USA.
RICE UNIV, DEPT PHYS, HOUSTON, TX 77251 USA.
RP Wang, LS (reprint author), WASHINGTON STATE UNIV, DEPT PHYS, RICHLAND, WA 99352 USA.
NR 26
TC 83
Z9 83
U1 3
U2 21
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0163-1829
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 12
BP 8028
EP 8031
DI 10.1103/PhysRevB.53.8028
PG 4
WC Physics, Condensed Matter
SC Physics
GA UC947
UT WOS:A1996UC94700071
ER
PT J
AU Lane, PA
Wei, X
Vardeny, ZV
Partee, J
Shinar, J
AF Lane, PA
Wei, X
Vardeny, ZV
Partee, J
Shinar, J
TI Optically detected magnetic-resonance study of triplet-state dynamics in
C-70
SO PHYSICAL REVIEW B
LA English
DT Article
ID ALPHA-SI-H; PHOTOPHYSICAL PROPERTIES; C-60; C60; C70; PHOTOLUMINESCENCE;
PHOTOEXCITATIONS; RECOMBINATION; FLUORESCENCE; FULLERENES
AB We present studies of fluorescence, phosphorescence, photoinduced absorption, and their respective optically detected magnetic resonance of C-70 molecules dispersed in polystyrene glasses. Two distinct triplet excitons are identified with principle zero-field splitting parameters (D approximate to 0.0089 and 0.0098 cm(-1), respectively) almost twice those reported in the literature (D approximate to 0.0052 cm(-1)). The first triplet is axially symmetric (E approximate to 0) and phosphorescent. Dramatic changes in the line shape and intensity of this triplet are observed as the temperature increases due to a dynamic Jahn-Teller effect. The second triplet, which is believed to arise from strained C-70 molecules, has no axial symmetry (E approximate to D/3) and is not phosphorescent.
C1 US DOE,AMES LAB,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011.
RP Lane, PA (reprint author), UNIV UTAH,DEPT PHYS,SALT LAKE CITY,UT 84112, USA.
NR 28
TC 3
Z9 3
U1 0
U2 4
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0163-1829
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 12
BP R7580
EP R7583
PG 4
WC Physics, Condensed Matter
SC Physics
GA UC947
UT WOS:A1996UC94700002
ER
PT J
AU Liu, AY
Quong, AA
AF Liu, AY
Quong, AA
TI Linear-response calculation of electron-phonon coupling parameters
SO PHYSICAL REVIEW B
LA English
DT Article
ID SELF-CONSISTENT CALCULATION; LATTICE-DYNAMICS; METALS; PSEUDOPOTENTIALS;
ALUMINUM; MODEL; LEAD
AB An ab initio method for calculating electron-phonon coupling parameters is presented. The method is an extension of the plane-wave-based linear-response method for the calculation of lattice dynamics. Results for the mass enhancement parameter lambda and the electron-phonon spectral function alpha(2)F(omega) for Al, Pb, and Li are presented. Comparisons are made to available experimental data.
C1 SANDIA NATL LABS,LIVERMORE,CA 94551.
RP Liu, AY (reprint author), GEORGETOWN UNIV,DEPT PHYS,WASHINGTON,DC 20057, USA.
RI Liu, Amy/E-2266-2015
OI Liu, Amy/0000-0002-2011-1854
NR 36
TC 55
Z9 55
U1 0
U2 2
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0163-1829
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 12
BP R7575
EP R7579
PG 5
WC Physics, Condensed Matter
SC Physics
GA UC947
UT WOS:A1996UC94700001
ER
PT J
AU Matsuura, AY
Shen, ZX
Dessau, DS
Park, CH
Thio, T
Bennett, JW
Jepsen, O
AF Matsuura, AY
Shen, ZX
Dessau, DS
Park, CH
Thio, T
Bennett, JW
Jepsen, O
TI Electronic structure and the metal-insulator transition in NiS2-xSex
SO PHYSICAL REVIEW B
LA English
DT Article
ID SYSTEM; PYRITES
AB We studied the metal-insulator transition in the NiS2-xSex system in x=0 and x=0.5 single crystals using angle-resolved photoemission. A narrow band, characteristic of many-body effects, develops near E(F) for x=0.5. This feature shifts away from E(F) at the transition temperature, a discontinuous change at the metal-insulator transition in a Mott-Hubbard system. We discuss our data in the context of recent theoretical calculations of the Hubbard model. The spectra support the general finding that a narrow peak of many-body nature develops at E(F) during the insulator-to-metal transition.
C1 STANFORD UNIV,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94305.
NEC RES INST,PRINCETON,NJ 08540.
MAX PLANCK INST FESTKORPERFORSCH,D-70569 STUTTGART,GERMANY.
RP Matsuura, AY (reprint author), STANFORD UNIV,DEPT APPL PHYS,STANFORD,CA 94305, USA.
NR 25
TC 36
Z9 36
U1 1
U2 8
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0163-1829
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 12
BP R7584
EP R7587
PG 4
WC Physics, Condensed Matter
SC Physics
GA UC947
UT WOS:A1996UC94700003
ER
PT J
AU Ocko, BM
Magnussen, OM
Wang, JX
Wandlowski, T
AF Ocko, BM
Magnussen, OM
Wang, JX
Wandlowski, T
TI One-dimensional commensurate-incommensurate transition: Bromide on the
Au(100) electrode
SO PHYSICAL REVIEW B
LA English
DT Article
ID X-RAY; GRAPHITE
AB In an electrochemical environment, bromide adsorbed on the Au(100) surface forms a commensurate c(root 2X2 root 2)R45 degrees monolayer over a range of applied potentials. At a critical potential the bromide monolayer undergoes a transition to a uniaxial-incommensurate c(root 2Xp)R45 degrees monolayer, where p continuously decreases from 2 root 2 with increasing potential. In the incommensurate phase, the data support an atomic model with uniform compression rather than sharp, well-ordered domain walls. The quadratic scaling of the peak widths with the incommensurate component of the wave vector suggests that the incommensurate phase exhibits ''cumulative disorder.''
C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973.
UNIV ULM,DEPT ELECTROCHEM,D-89069 ULM,GERMANY.
RP Ocko, BM (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA.
RI Thomas, Wandlowski/C-7251-2009; Wang, Jia/B-6346-2011
NR 18
TC 37
Z9 38
U1 1
U2 5
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0163-1829
J9 PHYS REV B
JI Phys. Rev. B
PD MAR 15
PY 1996
VL 53
IS 12
BP R7654
EP R7657
PG 4
WC Physics, Condensed Matter
SC Physics
GA UC947
UT WOS:A1996UC94700021
ER
PT J
AU Farrar, GR
Kolb, EW
AF Farrar, GR
Kolb, EW
TI Light photinos as dark matter
SO PHYSICAL REVIEW D
LA English
DT Article
ID NEUTRAL FERMIONS; CROSS-SECTIONS; CONSTRAINTS; CANDIDATES; MODELS;
ABUNDANCES; COSMOLOGY; PARTICLES; NEUTRINOS; MASSES
AB There are good reasons to consider models of low-energy supersymmetry with very light photinos and gluinos. In most of these models the lightest R-odd, color-singlet state containing a gluino, the R(0), has a mass in the 1-2 GeV range and the slightly lighter photino <(gamma)over tilde> would survive as the relic R-odd species. For the light photino masses considered here, previous calculations resulted in an unacceptable photino relic abundance. But we point out that processes other than photino self-annihilation determine the relic abundance when the photino and RO are close in mass. Including R(0) <-> <(gamma)over tilde> processes, we find that the photino relic abundance is most sensitive to the R(0)-to-<(gamma)over tilde> mass ratio, and within model uncertainties, a critical density in photinos may be obtained for an R(0)-to-<(gamma)over tilde> mass ratio in the range 1.2 to 2.2. We propose photinos in the mass range of 500 MeV to 1.6 GeV as a dark matter candidate, and discuss a strategy to test the hypothesis.
C1 FERMILAB NATL ACCELERATOR LAB,NASA,FERMILAB ASTROPHYS CTR,BATAVIA,IL 60510.
UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637.
RP Farrar, GR (reprint author), RUTGERS STATE UNIV,DEPT PHYS & ASTRON,POB 849,PISCATAWAY,NJ 08855, USA.
NR 32
TC 24
Z9 24
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0556-2821
J9 PHYS REV D
JI Phys. Rev. D
PD MAR 15
PY 1996
VL 53
IS 6
BP 2990
EP 3001
DI 10.1103/PhysRevD.53.2990
PG 12
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UC220
UT WOS:A1996UC22000012
ER
PT J
AU Wigley, TML
Santer, BD
Mitchell, JFB
Charlson, RJ
AF Wigley, TML
Santer, BD
Mitchell, JFB
Charlson, RJ
TI Climate change report
SO SCIENCE
LA English
DT Letter
C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551.
METEOROL OFF,HADLEY CTR CLIMATE PREDICT & RES,BRACKNELL RG12 2SY,BERKS,ENGLAND.
UNIV WASHINGTON,DEPT ATMOSPHER SCI,SEATTLE,WA 98195.
RP Wigley, TML (reprint author), NATL CTR ATMOSPHER RES,POB 3000,BOULDER,CO 80307, USA.
RI Wigley, Tom/B-4705-2008; Santer, Benjamin/F-9781-2011
NR 5
TC 2
Z9 2
U1 0
U2 3
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005
SN 0036-8075
J9 SCIENCE
JI Science
PD MAR 15
PY 1996
VL 271
IS 5255
BP 1481
EP 1482
DI 10.1126/science.271.5255.1481
PG 2
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA TZ983
UT WOS:A1996TZ98300006
PM 17840519
ER
PT J
AU Perelson, AS
Neumann, AU
Markowitz, M
Leonard, JM
Ho, DD
AF Perelson, AS
Neumann, AU
Markowitz, M
Leonard, JM
Ho, DD
TI HIV-1 dynamics in vivo: Virion clearance rate, infected cell life-span,
and viral generation time
SO SCIENCE
LA English
DT Article
ID IMMUNODEFICIENCY-VIRUS TYPE-1
AB A new mathematical model was used to analyze a detailed set of human immunodeficiency virus-type 1 (HIV-1) viral load data collected from five infected individuals after the administration of a potent inhibitor of HIV-1 protease. Productively infected cells were estimated to have, on average, a life-span of 2.2 days (half-life t(1/2) = 1.6 days), and plasma virions were estimated to have a mean life-span of 0.3 days (t(1/2) = 0.24 days). The estimated average total HIV-1 production was 10.3 x 10(9) virions per day, which is substantially greater than previous minimum estimates. The results also suggest that the minimum duration of the HIV-1 life cycle in vivo is 1.2 days on average, and that the average HIV-1 generation time-defined as the time from release of a virion until it infects another cell and causes the release of a new generation of viral particles-is 2.6 days, These findings on viral dynamics provide not only a kinetic picture of HIV-1 pathogenesis, but also theoretical principles to guide the development of treatment strategies.
C1 AARON DIAMOND AIDS RES CTR,NEW YORK,NY 10016.
LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545.
ABBOTT LABS,DIV PHARMACEUT PROD,ABBOTT PK,IL 60064.
RI Yang, Chen/G-1379-2010
FU NCRR NIH HHS [RR06555]; NIAID NIH HHS [AI27742, N01 AI45218]
NR 15
TC 2182
Z9 2244
U1 16
U2 127
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005
SN 0036-8075
J9 SCIENCE
JI Science
PD MAR 15
PY 1996
VL 271
IS 5255
BP 1582
EP 1586
DI 10.1126/science.271.5255.1582
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA TZ983
UT WOS:A1996TZ98300041
PM 8599114
ER
PT J
AU Noh, H
Flanagan, TB
Balasubramaniam, R
Eastman, JA
AF Noh, H
Flanagan, TB
Balasubramaniam, R
Eastman, JA
TI Characterization of internal oxidation and permeability of oxygen in
Pd/Al alloys using hydrogen isotherms
SO SCRIPTA MATERIALIA
LA English
DT Article
ID OXIDE
C1 UNIV VERMONT,DEPT CHEM,BURLINGTON,VT 05405.
INDIAN INST TECHNOL,DEPT MAT & MET ENGN,KANPUR 208016,UTTAR PRADESH,INDIA.
ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439.
RP Noh, H (reprint author), UNIV VERMONT,MAT SCI PROGRAM,BURLINGTON,VT 05405, USA.
RI Eastman, Jeffrey/E-4380-2011;
OI Eastman, Jeff/0000-0002-0847-4265
NR 9
TC 18
Z9 18
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 1359-6462
J9 SCRIPTA MATER
JI Scr. Mater.
PD MAR 15
PY 1996
VL 34
IS 6
BP 863
EP 868
DI 10.1016/1359-6462(95)00614-1
PG 6
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
Metallurgy & Metallurgical Engineering
SC Science & Technology - Other Topics; Materials Science; Metallurgy &
Metallurgical Engineering
GA TW216
UT WOS:A1996TW21600004
ER
PT J
AU Smith, DA
Rashid, H
Chakravarthy, RS
Agboatwalla, AM
Patil, AA
Bao, Z
Imam, N
Smith, SW
Baran, JE
Jackel, JL
Kallman, J
AF Smith, DA
Rashid, H
Chakravarthy, RS
Agboatwalla, AM
Patil, AA
Bao, Z
Imam, N
Smith, SW
Baran, JE
Jackel, JL
Kallman, J
TI Acousto-optic switch with a near rectangular passband for WDM systems
SO ELECTRONICS LETTERS
LA English
DT Article
DE wavelength division multiplexing; acousto-optical switches
AB The authors describe the most rectangular passband yet reported for an acousto-optic wavelength-routing switch. The device is a multicycle SAW directional-coupler-weighted AOTF, fabricated on XY lithium niobate, with a -3dB width of 2.52nm and a -20dB width of 0.89nm. For comparison, an ideal apodised AOTF with the same 3dB width would have a -20dB width of only 0.33nm.
C1 BELLCORE,RED BANK,NJ 07701.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA.
RP Smith, DA (reprint author), CASE WESTERN RESERVE UNIV,DEPT ELECT ENGN & APPL PHYS,GLENNAN 709B,10900 EUCLID AVE,CLEVELAND,OH 44106, USA.
NR 8
TC 2
Z9 2
U1 0
U2 1
PU IEE-INST ELEC ENG
PI HERTFORD
PA MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD, ENGLAND SG1 2AY
SN 0013-5194
J9 ELECTRON LETT
JI Electron. Lett.
PD MAR 14
PY 1996
VL 32
IS 6
BP 542
EP 543
DI 10.1049/el:19960355
PG 2
WC Engineering, Electrical & Electronic
SC Engineering
GA UL772
UT WOS:A1996UL77200028
ER
PT J
AU Ho, LL
MacKerell, AD
Bash, PA
AF Ho, LL
MacKerell, AD
Bash, PA
TI Proton and hydride transfers in solution: Hybrid QM/MM free energy
perturbation study
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID MALATE-DEHYDROGENASE; CONDENSED PHASE; SIMULATIONS; DYNAMICS; QUANTUM;
LYSOZYME; COMPLEX; MODELS; WATER
AB A hybrid quantum and molecular mechanical (QM/MM) free energy perturbation (FEP) method is implemented in the context of molecular dynamics (RID). The semiempirical quantum mechanical (QM) Hamiltonian (Austin Model 1) represents solute molecules, and the molecular mechanical (MM) CHARMM force field describes the water solvent. The QM/MM FEP method is used to calculate the free energy changes in aqueous solution for (1) a proton transfer from methanol to imidazole and (2) a hydride transfer from methoxide to nicotinamide. The QM/MM interaction energies between the solute and solvent are calibrated to emulate the solute-solvent interaction energies determined at the Hartee-Fock 6-31G(d) level of ab initio theory. The free energy changes for the proton and hydride transfers are calculated to be 15.1 and -6.3 kcal/mol, respectively, which compare favorably with the corresponding experimental values of 12.9 and -7.4 kcal/mol. An estimate of the reliability of the calculations is obtained through the computation of the forward (15.1 and -6.3 kcal/mol) and backward (-14.1 and 9.1 kcal/mol) free energy changes. The reasonable correspondence between these two independent calculations suggests that adequate phase space sampling is obtained along the reaction pathways chosen to transform the proton and hydride systems between their respective reactant and product states.
C1 ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439.
YALE UNIV,DEPT PHYS,JW GIBBS LAB,NEW HAVEN,CT 06511.
UNIV MARYLAND,SCH PHARM,DEPT PHARMACEUT SCI,BALTIMORE,MD 21230.
OI MacKerell, Alex/0000-0001-8287-6804
NR 28
TC 37
Z9 37
U1 1
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 14
PY 1996
VL 100
IS 11
BP 4466
EP 4475
DI 10.1021/jp952578e
PG 10
WC Chemistry, Physical
SC Chemistry
GA UA005
UT WOS:A1996UA00500021
ER
PT J
AU Chen, PY
Holroyd, RA
AF Chen, PY
Holroyd, RA
TI Effect of pressure on the e(-)+pyrimidine reversible arrow pyrimidine(-)
equilibrium in nonpolar solvents
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID NON-POLAR LIQUIDS; ELECTRON-ATTACHMENT; 2,2-DIMETHYLBUTANE; AFFINITIES;
IONS; CO2
AB The thermodynamics of the equilibrium reaction e(-) + pyrimidine reversible arrow pyrimidine(-) was studied in tetramethylsilane (TMS) and 2,2,4-trimethylpentane (TMP) as solvents. In hexane, only the forward attachment reaction could be observed. The attachment rate constants (k(a)) increase with temperature in all solvents. The equilibrium shifts to the right with increasing pressure because of the large, negative reaction volumes (-200 to -330 cm(3)/mol). The volume changes are consistent with electrostriction by the pyrimidine anion when a glass shell of solvent molecules is included. The free energy of reaction at 298 K is -0.43 eV in tetramethylsilane at 1 bar and -0.70 eV in 2,2,4-trimethylpentane at 150 bar. The solution free energies indicate the gas-phase (adiabatic) electron affinity of pyrimidine is -0.24 eV.
C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973.
NR 31
TC 17
Z9 17
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 14
PY 1996
VL 100
IS 11
BP 4491
EP 4495
DI 10.1021/jp9531321
PG 5
WC Chemistry, Physical
SC Chemistry
GA UA005
UT WOS:A1996UA00500025
ER
PT J
AU Rajh, T
Ostafin, AE
Micic, OI
Tiede, DM
Thurnauer, MC
AF Rajh, T
Ostafin, AE
Micic, OI
Tiede, DM
Thurnauer, MC
TI Surface modification of small particle TiO2 colloids with cysteine for
enhanced photochemical reduction: An EPR study
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID ELECTRON-PARAMAGNETIC-RES; PULSE-RADIOLYSIS; POTENTIALS; OXIDATION;
MECHANISM; RADICALS; WATER; IONS
AB Surface complexation of colloidal titanium dioxide nanoparticles (40-60 Angstrom) with cysteine was investigated by electron paramagnetic resonance (EPR) and infrared (diffuse reflectance infrared Fourier transform-DRIFT) spectroscopies. Cysteine was found to bind strongly to the TiO2 surface, resulting in formation of new trapping sites where photogenerated electrons and holes are localized, Illumination of cysteine-modified TiO2 at 77 K resulted in formation of cysteine radicals with the unpaired electron localized on the carboxyl group. Upon warming to 150 K, these radicals are transformed into sulfur-centered radicals as observed by EPR spectroscopy. We have demonstrated the existence of two surface Ti(III) centers on cysteine-modified TiO2 particles having different extents of tetragonal distortion of the octahedral crystal field. Upon addition of lead ions, a new complex of cysteine that bridges surface titanium atoms and lead ions was detected by IR spectroscopy. Illumination of lead/cysteine-modified TiO2 did not result in the formation of sulfur-centered radicals. Instead, a symmetrical, lattice defect type EPR signal for trapped holes was observed. Addition of methanol to this system resulted in the formation of a . CH2OH radical at 8.2 K. After the temperature was raised to 120 K, doubling of the signal associated with electrons trapped at the particle surface Ti(III)(surf)) was observed. On further increase of the temperature to 200 K, the EPR signal for trapped electrons disappeared due to the reduction of Pb2+ ions, and metallic lead precipitated at room temperature. Conversion of photogenerated holes in the presence of methanol into trapped electrons can lead to the doubled quantum efficiency of metallic lead precipitation.
C1 ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439.
NR 51
TC 189
Z9 192
U1 4
U2 38
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 14
PY 1996
VL 100
IS 11
BP 4538
EP 4545
DI 10.1021/jp952002p
PG 8
WC Chemistry, Physical
SC Chemistry
GA UA005
UT WOS:A1996UA00500033
ER
PT J
AU Andersen, OS
Feldberg, SW
AF Andersen, OS
Feldberg, SW
TI The heterogeneous collision velocity for hydrated ions in aqueous
solutions is similar to 10(4) cm/s
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID GRAMICIDIN-A CHANNELS; LIPID BILAYER; MOVEMENT; POTENTIALS; MEMBRANES;
SODIUM; WATER; NMR
AB The heterogeneous collision velocity v(o), units of centimeters/second) is the average velocity of a solution particle toward a surface. v(o) thus defines the maximum flux of the particles to the surface. Einstein argued that v(o) in condensed phases and in gases may be deduced in a precisely analogous manner and that v(o) in aqueous solution therefore should be similar to 10(4) cm/s (for particles with a mass of 100 Da). Values of v(o) for several aqueous monovalent cations (Na+, K+, Rb+, Cs+ and NH4+) were estimated from steady-state limiting current measurements through single gramicidin A channels spanning lipid bilayer membranes. The collisional and diffusional current components were separated by making use of the different viscosities of H2O and D2O solutions. The transfer of ions from the bulk solution to the channel entrance is modeled using a hemispherical entrance and an extension of the classical analysis of diffusion to a (hemi)sphere in which we relax the assumption that the jump distance (associated with three-dimensional diffusion of an ion in the bulk phase) be small compared to the hemispherical capture radius. Our estimate of v(o) agrees well with the prediction of Einstein. We therefore conclude that ion dehydration (only partially hydrated ions can pass through the gramicidin A channel) cannot be a rate-controlling step-a conclusion that is consistent with known rate constants for water exchange for these ions.
C1 BROOKHAVEN NATL LAB, DEPT APPL SCI, UPTON, NY 11973 USA.
RP Andersen, OS (reprint author), CORNELL UNIV MED COLL, DEPT PHYSIOL & BIOPHYS, NEW YORK, NY 10021 USA.
NR 34
TC 28
Z9 29
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 14
PY 1996
VL 100
IS 11
BP 4622
EP 4629
DI 10.1021/jp952687t
PG 8
WC Chemistry, Physical
SC Chemistry
GA UA005
UT WOS:A1996UA00500045
ER
PT J
AU Suzuki, S
Shimakura, N
Kimura, M
AF Suzuki, S
Shimakura, N
Kimura, M
TI Molecular-orbital treatment of electron capture in an external magnetic
field: Collisions of B4+ ions with H atoms
SO JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
LA English
DT Article
ID CHARGE-TRANSFER; ENERGY; APPROXIMATION; COUPLINGS
AB A semiclassical close-coupling equation is formulated for the electron-capture process in ion-atom collisions under the influence of an external magnetic field. The direction of the magnetic field is chosen to be parallel to an initial velocity vector of a projectile. As we deal with the case for the magnetic field strength less than the critical field strength (2.35 x 10(5) T), the second- and higher-order terms for the magnetic field are neglected. Eigenfunctions in zero magnetic field are employed as a basis set for expansion. The equation obtained is the same in structure as that at zero magnetic field except that the relative velocity v is replaced by the scaled velocity v(B). Effects due to the magnetic field are: (i) dynamical couplings, similar to rotational couplings and (ii) the Zeeman splitting of energies. The phase factor due to the gauge transformation is similar in form to the electron-translation factor. We apply this close-coupling equation to a study of electron-capture processes in a singlet (B4+ + H) system at 0 less than or equal to B less than or equal to 2.35 x 10(4) T, for which the zero-field results have been reported earlier (Shimakura et al 1993). Calculated results show that the total electron-capture cross section increases by about 30% at the magnetic field B = 1.17 x 10(4) T compared to that at zero magnetic field at collision energy E = 122.5 eV/amu. At low collision energies below 500 eV/amu, the effect of the magnetic field becomes dominant over that of rotational couplings at 10(4) T. Because the magnetic field removes the degeneracy of electronic energies for Pi (and Delta) states by the Zeeman effect, transition probabilities for Pi(+) and Pi(-) (and also Delta(+) and Delta(-)) states differ significantly. The transition probabilities oscillate with time even if the collision pair separates considerably, particularly for B3+(1s3p(0,+/-1)) and B3+(1s3d(0,+/-1,+/-2)) states because of the magnetic field.
C1 NIIGATA UNIV,FAC SCI,NIIGATA 95021,JAPAN.
ARGONNE NATL LAB,ARGONNE,IL 60439.
RICE UNIV,DEPT PHYS,HOUSTON,TX 77251.
RP Suzuki, S (reprint author), NIIGATA UNIV,GRAD SCH SCI & TECHNOL,NIIGATA 95021,JAPAN.
NR 22
TC 8
Z9 8
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX
SN 0953-4075
J9 J PHYS B-AT MOL OPT
JI J. Phys. B-At. Mol. Opt. Phys.
PD MAR 14
PY 1996
VL 29
IS 5
BP 1063
EP 1078
DI 10.1088/0953-4075/29/5/015
PG 16
WC Optics; Physics, Atomic, Molecular & Chemical
SC Optics; Physics
GA UB922
UT WOS:A1996UB92200015
ER
PT J
AU Rabinovich, D
Haswell, CM
Scott, BL
Miller, RL
Nielsen, JB
Abney, KD
AF Rabinovich, D
Haswell, CM
Scott, BL
Miller, RL
Nielsen, JB
Abney, KD
TI New dicarbollide complexes of uranium
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CRYSTAL-STRUCTURE; CHEMISTRY; OXIDE
AB A series of new uranium complexes incorporating dicarbollide ligands (C2B9H112-) has been synthesized. The uranium(TV) bis(dicarbollide) complex [Li(THF)(4)](2)- [U(eta(5)-C2B9H11)(2)Br-2] was obtained from the reaction of UBr4(NCMe)(4) with 2 equiv of Li2C2B9H11 in THF, and its structure determined by single-crystal X-ray diffraction. Similarly, the uranium(III) complexes [U(eta(5)-C2B9H11)I-2(THF)(2)](-) and [U(eta(5)-C2B9H11)(2)I- (THF)](2-) were isolated from the reactions of UI3-(TRF)(4) with different dicarbollide salts, and the structure of the related dimethyldicarbollide complex [(Ph(3)P)(2)N][U(eta(5)-C(2)Me(2)B(9)H(9))I-2(THF)(2)] determined by X-ray crystallography.
C1 LOS ALAMOS NATL LAB,DIV CHEM SCI & TECHNOL,LOS ALAMOS,NM 87545.
RI Chamberlin, Rebecca/A-1335-2011; Scott, Brian/D-8995-2017
OI Chamberlin, Rebecca/0000-0001-6468-7778; Scott,
Brian/0000-0003-0468-5396
NR 23
TC 15
Z9 15
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD MAR 13
PY 1996
VL 35
IS 6
BP 1425
EP &
DI 10.1021/ic951444c
PG 3
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA UA169
UT WOS:A1996UA16900005
ER
PT J
AU Dong, ZC
Corbett, JD
AF Dong, ZC
Corbett, JD
TI A(15)Tl(27) (A=Rb,Cs): A structural type containing both isolated
clusters and condensed layers based on the Tl-11 fragment. Syntheses,
structure, properties, and band structure
SO INORGANIC CHEMISTRY
LA English
DT Article
ID CRYSTAL-STRUCTURE; INDIUM CLUSTERS; NETWORK; SYSTEMS; K8IN11
AB The isomorphous title compounds (and the ordered substitutional Rb14CsTl27) are obtained directly from reactions of the elements in sealed Ta below similar to 330 degrees C. Refinements of single-crystal data for the three established a structure with alternate layers of isolated pentacapped trigonal prismatic Tl-11(7-) (D-3h) ions and condensed (2.)(infinity)[Tl-16(8-)] networks that are separated by cations. The condensed layer consists of Tl-11 units that share prismatic edges and ate interbridged through waist-capping atoms (Tl6/2Tl3Tl2). (Rb15Tl27: P (6) over bar 2m, Z = 1, a = 10.3248(6) Angstrom, c = 17.558(2) Angstrom.) The rubidium phase is a poor metal (p(293) similar to 34 mu Omega.cm) and is Pauli-paramagnetic. Extended Huckel band calculations indicate partially filled bands and a non-zero DOS at E(F), consistent with the observed metallic behavior, although appropriate cation tuning or modest anion doping should provide a Zintl phase. The band structure and COOP curves are also used to rationalize the distortion of the Tl-11 unit on condensation and the critical role of the interfragment bonds between waist-capping atoms in stabilizing the layer.
C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011.
NR 40
TC 23
Z9 23
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD MAR 13
PY 1996
VL 35
IS 6
BP 1444
EP 1450
DI 10.1021/ic951086d
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA UA169
UT WOS:A1996UA16900010
ER
PT J
AU Meier, M
Sun, J
Wishart, JF
vanEldik, R
AF Meier, M
Sun, J
Wishart, JF
vanEldik, R
TI Comparative kinetic analysis of reversible intermolecular
electron-transfer reactions between a series of pentaammineruthenium
complexes and cytochrome c
SO INORGANIC CHEMISTRY
LA English
DT Article
ID IONIC-STRENGTH DEPENDENCE; L-ASCORBIC-ACID; HIGH-PRESSURE;
AQUEOUS-SOLUTION; RATE CONSTANTS; HORSE HEART; OXIDATION; ACTIVATION;
REDUCTION; TEMPERATURE
AB In this kinetic and thermodynamic study, the reversible outer-sphere electron-transfer reactions between a series of Ru(NH3)(5)L(3+/2+) complexes (L = etpy, py, lut) (etpy = 4-ethylpyridine; py = pyridine; lut = 3,5-lutidine) and cytochrome c were investigated as a function of ionic strength, buffer, pH, temperature, and pressure. Due to the low driving forces of these systems, it was possible to study all the reactions in both redox directions. The observed rate constants for various L are correlated on the basis of the ability of ligands on the ruthenium complex to penetrate the heme groove on cytochrome c. The measurements as a function of pressure enabled the construction of volume profiles for all investigated systems. The activation volumes for all of these processes are very similar: between -14.9 and -17.8 cm(3) mol(-1) for the reduction and between +14.7 and +17.8 cm(3) mol(-1) for the oxidation of the protein by Ru(MH(3))(5)L(2+/3+), respectively. The overall reaction volume varies between 27 and 35 cm(3) mol(-1), from which it follows that the transition state lies exactly halfway between reactant and product states on a volume basis in all cases. There is good agreement throughout between kinetic and thermodynamic data.
C1 BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973.
UNIV ERLANGEN NURNBERG,INST INORGAN CHEM,D-91058 ERLANGEN,GERMANY.
RI Wishart, James/L-6303-2013
OI Wishart, James/0000-0002-0488-7636
NR 49
TC 38
Z9 38
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0020-1669
J9 INORG CHEM
JI Inorg. Chem.
PD MAR 13
PY 1996
VL 35
IS 6
BP 1564
EP 1570
DI 10.1021/ic9413528
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA UA169
UT WOS:A1996UA16900027
ER
PT J
AU Harel, M
Quinn, DM
Nair, HK
Silman, I
Sussman, JL
AF Harel, M
Quinn, DM
Nair, HK
Silman, I
Sussman, JL
TI The X-ray structure of a transition state analog complex reveals the
molecular origins of the catalytic power and substrate specificity of
acetylcholinesterase
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID ACID-BASE CATALYSIS; REACTION DYNAMICS; DISPLACEMENT-REACTIONS;
MAGNETIC-RESONANCE; SERINE PROTEASES; AQUEOUS-SOLUTION; GAS-PHASE;
BINDING; HYDROLYSIS; INHIBITORS
AB The structure of a complex of Torpedo calfornica acetylcholinesterase with the transition state analog inhibitor m-(N,N,N-trimethylammonio)-2,2,2-trifluoroacetophenone has been solved by X-ray crystallographic methods to 2.8 Angstrom resolution. Since the inhibitor binds to the enzyme about 10(10)-fold more tightly than the substrate acetylcholine, this complex provides a visual accounting of the enzyme-ligand interactions that provide the molecular basis for the catalytic power of acetylcholinesterase. The enzyme owes about 8 kcal mol(-1) of the 18 kcal mol(-1) of free energy of stabilization of the acylation transition state to interactions of the quaternary ammonium moiety with three water molecules, with the carboxylate side chain of E199, and with the aromatic side chains of W84 and F330. The carbonyl carbon of the trifluoroketone function interacts covalently with S200 of the S200-H440-E327 catalytic triad. The operation of this triad as a general acid-base catalytic network probably provides 3-5 kcal mol(-1) of the free energy of stabilization of the transition state. The remaining 5-7 kcal mol(-1) of transition state stabilization probably arises from tripartite hydrogen bonding between the incipient oxyanion and the NH functions of G118, G119, and A201. The acetyl ester hydrolytic specificity of the enzyme is revealed by the interaction of the CF3 function of the transition state analog with a concave binding site comprised of the residues G119, W233, F288, F290, and F331. The highly geometrically convergent array of enzyme-ligand interactions visualized in the complex described herein envelopes the acylation transition state and sequesters it from solvent, this being consistent with the location of the active site at the bottom of a deep and narrow gorge.
C1 WEIZMANN INST SCI, DEPT BIOL STRUCT, IL-76100 REHOVOT, ISRAEL.
WEIZMANN INST SCI, DEPT NEUROBIOL, IL-76100 REHOVOT, ISRAEL.
BROOKHAVEN NATL LAB, DEPT BIOL, UPTON, NY 11973 USA.
BROOKHAVEN NATL LAB, DEPT CHEM, UPTON, NY 11973 USA.
UNIV IOWA, DEPT CHEM, IOWA CITY, IA 52242 USA.
OI Sussman, Joel/0000-0003-0306-3878
NR 79
TC 279
Z9 281
U1 5
U2 33
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAR 13
PY 1996
VL 118
IS 10
BP 2340
EP 2346
DI 10.1021/ja952232h
PG 7
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA029
UT WOS:A1996UA02900005
ER
PT J
AU Glendening, ED
AF Glendening, ED
TI Natural energy decomposition analysis: Explicit evaluation of
electrostatic and polarization effects with application to aqueous
clusters of alkali metal cations and neutrals
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID CONFIGURATION-INTERACTION CALCULATIONS; MOLECULAR WAVE-FUNCTIONS;
BENCHMARK CALCULATIONS; SYSTEMATIC SEQUENCES; DIATOMIC HYDRIDES;
BASIS-SETS; HYDROGEN; WATER; POTENTIALS; HYDRATION
AB Natural energy decomposition analysis (NEDA) is extended to calculate electrostatic and polarization contributions. NEDA is a Hartree-Fock-based approach that facilitates the calculation of the electrostatic, polarization, charge transfer, exchange, and deformation components of intermolecular interactions. Analysis of the aqueous clusters of the alkali metal cations, M(+)(H2O)(n) (n = 1-4), demonstrates the reasonable behavior of the NEDA components and dipole moments with changes in geometry and coordination. In general, the electrostatic and polarization components behave as anticipated from a classical treatment based on point charges, dipoles, and polarizabilities. Extended basis set applications demonstrate the high numerical stability of the method whereas comparison calculations with the Morokuma analysis show contrastingly poor basis set convergence. The popular 6-31+G* basis set yields a binding energy for Li+(H2O) in good agreement with the estimated complete basis set (CBS) limit. However, comparison of the 6-31+G* and CBS NEDA results reveals that this agreement is fortuitous, relying on a cancellation of errors that stem from the inability of this basis set to accurately describe the dipole moment and polarizability of water. Representative calculations are also presented for open-shell clusters Na(H2O)(n) (n = 1-4) at the unrestricted-Hartree-Fock level.
C1 INDIANA STATE UNIV, DEPT CHEM, TERRE HAUTE, IN 47809 USA.
RP Glendening, ED (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA.
NR 42
TC 130
Z9 130
U1 0
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAR 13
PY 1996
VL 118
IS 10
BP 2473
EP 2482
DI 10.1021/ja951834y
PG 10
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA029
UT WOS:A1996UA02900020
ER
PT J
AU Luecke, HF
Arndtsen, BA
Burger, P
Bergman, RG
AF Luecke, HF
Arndtsen, BA
Burger, P
Bergman, RG
TI Synthesis of fischer carbene complexes of iridium by C-H bond activation
of methyl and cyclic ethers: Evidence for reversible alpha-hydrogen
migration
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID HYDRIDE; REACTIVITY; RHODIUM; CARBON
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720.
NR 20
TC 90
Z9 90
U1 0
U2 14
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAR 13
PY 1996
VL 118
IS 10
BP 2517
EP 2518
DI 10.1021/ja953437t
PG 2
WC Chemistry, Multidisciplinary
SC Chemistry
GA UA029
UT WOS:A1996UA02900033
ER
PT J
AU Christen, HM
Boatner, LA
Budai, JD
Chisholm, MF
Gea, LA
Marrero, PJ
Norton, DP
AF Christen, HM
Boatner, LA
Budai, JD
Chisholm, MF
Gea, LA
Marrero, PJ
Norton, DP
TI The growth and properties of epitaxial KNbO3 thin films and KNbO3/KTaO3
superlattices
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID DEPOSITION; CRYSTALS
AB Potassium niobate (KNbO3) thin films and potassium niobate/tantalate (KNbO3/KTaO3) superlattices have been grown on KTaO3 (001) substrates by pulsed loser deposition. The thin-film structures were analyzed by Rutherford backscattering/ion-channeling techniques, x-ray theta-2 theta and Phi scans, and both conventional and Z-contrast scanning transmission electron microscopy. Excellent film flatness and crystallinity are evidenced by these techniques. At room temperature, the KNbO3 films are characterized by an orthorhombic structure which differs from that of bulk KNbO3. The interfaces between the layers in the KNbO3/KTaO3 superlattice structures were found to be compositionally sharp on an atomic scale. (C) 1996 American Institute of Physics.
C1 UNIV PUERTO RICO,DEPT FIS,MAYAGUEZ,PR 00681.
RP Christen, HM (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831, USA.
RI Christen, Hans/H-6551-2013; Boatner, Lynn/I-6428-2013; Budai,
John/R-9276-2016
OI Christen, Hans/0000-0001-8187-7469; Boatner, Lynn/0000-0002-0235-7594;
Budai, John/0000-0002-7444-1306
NR 19
TC 79
Z9 79
U1 3
U2 27
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 11
PY 1996
VL 68
IS 11
BP 1488
EP 1490
DI 10.1063/1.116263
PG 3
WC Physics, Applied
SC Physics
GA TZ291
UT WOS:A1996TZ29100016
ER
PT J
AU Jasinski, J
Chen, Y
Washburn, J
LilientalWeber, Z
Tan, HH
Jagadish, C
Kaminska, M
AF Jasinski, J
Chen, Y
Washburn, J
LilientalWeber, Z
Tan, HH
Jagadish, C
Kaminska, M
TI Recrystallization of high energy As-implanted GaAs studied by
transmission electron microscopy
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID LAYERS
AB Ion implantation damage and the regrowth process during thermal annealing of 2 MeV As-ion-implanted GaAs were studied by transmission electron microscopy. With low-temperature annealing, a high denisty of stacking faults was formed during the recrystallization process, but they were rarely observed with high-temperature annealing. At intermediate temperatures, a much lower denisty of stacking faults was generated at the upper interface between the buried amorphous layer and the crystal than that at the lower interface, where a higher concentration of as-implanted arsenic exists. Based on the observed experimental results, an atomic model is proposed to explain the formation of stacking faults induced by As clusters. (C) 1996 American Institute of Physics.
C1 AUSTRALIAN NATL UNIV,RES SCH PHYS SCI & ENGN,DEPT ELECTR MAT ENGN,CANBERRA,ACT 0200,AUSTRALIA.
WARSAW UNIV,INST PHYS EXPTL,PL-00681 WARSAW,POLAND.
RP Jasinski, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720, USA.
RI Tan, Hark Hoe/M-1148-2015
OI Tan, Hark Hoe/0000-0002-7816-537X
NR 15
TC 7
Z9 7
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 11
PY 1996
VL 68
IS 11
BP 1501
EP 1503
DI 10.1063/1.115679
PG 3
WC Physics, Applied
SC Physics
GA TZ291
UT WOS:A1996TZ29100021
ER
PT J
AU Chen, AL
Walukiewicz, W
Duxstad, K
Haller, EE
AF Chen, AL
Walukiewicz, W
Duxstad, K
Haller, EE
TI Migration of compensating defects in p-type ZnSe during annealing
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID DETECTED MAGNETIC-RESONANCE; MOLECULAR-BEAM EPITAXY; GROWTH
AB We annealed p-type, nitrogen-doped ZnSe grown by molecular-beam epitaxy and subsequently characterized the samples by photoluminescence spectroscopy, capacitance-voltage profiling, and secondary ion mass spectroscopy. We found that the decrease in active acceptor concentration upon annealing stems from compensation by defects that originate from the surface. By fitting the nitrogen acceptor profiles with solutions of the diffusion equation, we estimate the migration energy of the compensating defect to be 4.0+/-0.3 eV. (C) 1996 American Institute of Physics.
C1 UNIV CALIF BERKELEY,DEPT MAT SCI & MINERAL ENGN,BERKELEY,CA 94720.
RP Chen, AL (reprint author), LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV SCI MAT,BERKELEY,CA 94720, USA.
NR 15
TC 13
Z9 13
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 11
PY 1996
VL 68
IS 11
BP 1522
EP 1524
DI 10.1063/1.115686
PG 3
WC Physics, Applied
SC Physics
GA TZ291
UT WOS:A1996TZ29100028
ER
PT J
AU Gerber, R
Koelle, D
Gross, R
Huebener, RP
Ludwig, F
Dantsker, E
Kleiner, R
Clarke, J
AF Gerber, R
Koelle, D
Gross, R
Huebener, RP
Ludwig, F
Dantsker, E
Kleiner, R
Clarke, J
TI Low temperature scanning electron microscopy study of YBa2Cu3O7-delta
multilayer dc SQUID magnetometers
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FLUX TRANSFORMER
AB Low temperature scanning electron microscopy (LTSEM) has been used to analyze the superconducting properties of integrated magnetometers involving a de superconducting quantum interference device. The study yielded spatially resolved information on the critical temperature T-c and critical current density J(c) in the upper and lower superconducting layers of the YBa2Cu3O7-delta/SrTiO3/YBa2Cu3O7-delta stricture. The T-c of the lower film was depressed by several kelvin, and the J(c) of the upper film was lower where it crossed the edge of a lower YBa2Cu3O7-delta film covered with SrTiO3. A gradient in T-c was observed in the lower film near the edge of a via, arising presumably from oxygen diffusion during fabrication. (C) 1996 American Institute of Physics.
C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720.
LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720.
RP Gerber, R (reprint author), UNIV TUBINGEN,INST PHYS,LEHRSTUHL EXPTL PHYS 2,MORGENSTELLE 14,D-72076 TUBINGEN,GERMANY.
RI Koelle, Dieter/E-5111-2011; Gross, Rudolf/A-6227-2012
OI Gross, Rudolf/0000-0003-4524-7552
NR 13
TC 14
Z9 14
U1 0
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 11
PY 1996
VL 68
IS 11
BP 1555
EP 1557
DI 10.1063/1.115697
PG 3
WC Physics, Applied
SC Physics
GA TZ291
UT WOS:A1996TZ29100039
ER
PT J
AU Seshadri, S
Rotem, D
AF Seshadri, S
Rotem, D
TI The two headed disk: Stochastic dominance of the greedy policy
SO INFORMATION PROCESSING LETTERS
LA English
DT Article
DE two headed disk; seek time; stochastic optimality; analysis of
algorithms
AB In his paper ''Should the two-headed disk be greedy? - Yes, it should'' Hofri defined a ''greedy policy'' as follows. Assuming that the range of disk addresses is [0,1], a request at location x is served by the closest arm while the other arm jockeys to a new position, z, where z = (1/3)x or z = 2/3 + x/3 depending on whether x is larger or smaller than 1/2. Hofri proved that this policy minimizes the expected seek distance for uniform request probabilities and conjectured that it stochastically dominates every other policy. Stochastic dominance is of practical importance in this context as it guarantees that a policy that optimizes expected seek distance also guarantees optimal seek time. The main result of this paper is a proof of Hofri's conjecture. The paper contains two proofs, the first establishes the conjecture, and the second shows that if the seek distance is stochastically minimized under a repositioning policy, then the policy must be Hofri's greedy policy and the request distribution must be uniform.
C1 LAWRENCE BERKELEY LAB,INFORMAT & COMP SCI DIV,BERKELEY,CA 94720.
RP Seshadri, S (reprint author), NYU,LEONARD N STERN SCH BUSINESS,DEPT STAT & OPERAT RES,NEW YORK,NY 10012, USA.
RI Seshadri, Sridhar/D-6034-2012
NR 6
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0020-0190
J9 INFORM PROCESS LETT
JI Inf. Process. Lett.
PD MAR 11
PY 1996
VL 57
IS 5
BP 273
EP 277
DI 10.1016/0020-0190(95)00210-3
PG 5
WC Computer Science, Information Systems
SC Computer Science
GA UF590
UT WOS:A1996UF59000008
ER
PT J
AU Jacobsen, ER
Segel, RE
Bent, RD
Brown, JD
Hardie, G
Schneider, R
Sun, C
Berg, GPA
Blomgren, J
Chen, FJ
Heimberg, P
Holmolka, J
Kurepin, A
Nann, H
Pancella, P
Rehm, KE
Rinckel, T
Saber, M
Yu, Z
Zhuravlev, A
AF Jacobsen, ER
Segel, RE
Bent, RD
Brown, JD
Hardie, G
Schneider, R
Sun, C
Berg, GPA
Blomgren, J
Chen, FJ
Heimberg, P
Holmolka, J
Kurepin, A
Nann, H
Pancella, P
Rehm, KE
Rinckel, T
Saber, M
Yu, Z
Zhuravlev, A
TI Measurement of high momentum transfer reactions by recoil detection at a
cooler ring
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
AB A system for the measurement of medium-energy, high-momentum transfer reactions via detection of the heavier ion products has been developed. The system consists of a parallel grid avalanche counter, a proportional counter, and a large-area microstrip silicon detector array, all attached to a large-gap dipole magnet that bends the primary beam through 6 degrees and sweeps the recoil ions into the detection system. The detector stack measures the energy, time-of-flight, nuclear charge, mass, and angle of recoil-ion emission products. Ray tracing gives the emission angle of the recoil ions at the target. The system was installed at the Indiana Cooler Ring and its advantages and use in a storage ring environment are discussed. Preliminary results of differential cross section measurements for the reaction C-12(p, pi(+))C-13 at T-p = 166 and 294 MeV are presented.
C1 INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47408.
INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47408.
PRINCETON UNIV,DEPT PHYS,PRINCETON,NJ 08540.
NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60201.
WESTERN MICHIGAN UNIV,DEPT PHYS,KALAMAZOO,MI 49008.
TECH UNIV MUNICH,DEPT PHYS,W-8000 MUNICH,GERMANY.
ARGONNE NATL LAB,DIV PHYS,ARGONNE,IL 60439.
RUSSIAN ACAD SCI,INST NUCL RES,MOSCOW,RUSSIA.
RI Kurepin, Alexey/H-4852-2013
OI Kurepin, Alexey/0000-0002-1851-4136
NR 17
TC 2
Z9 2
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 11
PY 1996
VL 371
IS 3
BP 439
EP 448
DI 10.1016/0168-9002(95)00993-0
PG 10
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG782
UT WOS:A1996UG78200015
ER
PT J
AU Chikanian, A
Kumar, BS
Smirnov, N
OBrien, E
AF Chikanian, A
Kumar, BS
Smirnov, N
OBrien, E
TI A momentum reconstruction algorithm for the PHENIX spectrometer at
Brookhaven
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article
AB We have developed a non-linear grid interpolation technique to determine the momenta of particles traversing an axially symmetric focusing magnetic field. We describe the technique, and quantify its performance in the context of the PHENIX spectrometer.
C1 YALE UNIV,AW WRIGHT NUCL STRUCT LAB,NEW HAVEN,CT 06520.
BROOKHAVEN NATL LAB,DEPT PHYS,LONG ISL CITY,NY 11398.
NR 7
TC 5
Z9 5
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 11
PY 1996
VL 371
IS 3
BP 480
EP 488
DI 10.1016/0168-9002(95)01000-9
PG 9
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG782
UT WOS:A1996UG78200020
ER
PT J
AU Heiselberg, H
Wang, XN
AF Heiselberg, H
Wang, XN
TI Thermal equilibration in an expanding parton plasma
SO NUCLEAR PHYSICS B
LA English
DT Article
ID HEAVY-ION COLLISIONS; NUCLEUS-NUCLEUS COLLISIONS; QUARK-GLUON; HOT QCD;
PARTICLE-PRODUCTION; FINITE-TEMPERATURE; DAMPING RATE; MODEL;
SCATTERING; TRANSPORT
AB Thermalization in an expanding parton plasma is studied within the framework of the Boltzmann equation in the absence of any mean fields. In particular, we study the time dependence of the relaxation time to the lowest order in finite temperature QCD and how such time dependence affects the thermalization of an expanding parton plasma, Because of Debye screening and Landau damping at finite temperature, the relaxation time (or transport rates) is free of infrared divergencies in both longitudinal and transverse interactions, The resultant relaxation time decreases with time in an expanding plasma like 1/tau(beta), with beta < 1. We prove in this case that thermal equilibrium will eventually be established given a long life-time of the system. However, a fixed momentum cut-off in the calculation of the relaxation time gives rise to a much stronger time dependence which will slow down thermal equilibrium, It is also demonstrated that the ''memory effect'' of the initial condition affects the approach thermal equilibrium and the final entropy production.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720.
RP Heiselberg, H (reprint author), NORDITA,BLEGDAMSVEJ 17,DK-2100 COPENHAGEN 0,DENMARK.
OI Wang, Xin-Nian/0000-0002-9734-9967; Heiselberg,
Henning/0000-0003-2229-2000
NR 46
TC 24
Z9 24
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAR 11
PY 1996
VL 462
IS 2-3
BP 389
EP 411
DI 10.1016/0550-3213(95)00680-X
PG 23
WC Physics, Particles & Fields
SC Physics
GA UD042
UT WOS:A1996UD04200006
ER
PT J
AU Richardson, JW
Price, DL
Saboungi, ML
AF Richardson, JW
Price, DL
Saboungi, ML
TI Crystal symmetry lowering at an order-disorder transition
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID PHASE-TRANSITION; ALLOY; NASN
AB Neutron diffraction measurements in the high-temperature disordered phase of NaSn show that the transition to this phase from the ordered low-temperature phase is associated with a lowering of crystal symmetry which is unique among disordering transitions. The structure refinement reveals intimate correlations between the Na+ cation positions and Sn-4(4-) polyanion orientations in the disordered phase, and indicates that the cation migration takes place along convoluted channels in the crystal.
RP ARGONNE NATL LAB, 9700 S CASS AVE, ARGONNE, IL 60439 USA.
RI Price, David Long/A-8468-2013; Saboungi, Marie-Louise/C-5920-2013
OI Saboungi, Marie-Louise/0000-0002-0607-4815
NR 20
TC 7
Z9 7
U1 0
U2 0
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
EI 1079-7114
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 11
PY 1996
VL 76
IS 11
BP 1852
EP 1855
DI 10.1103/PhysRevLett.76.1852
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ282
UT WOS:A1996TZ28200023
ER
PT J
AU Weir, ST
Mitchell, AC
Nellis, WJ
AF Weir, ST
Mitchell, AC
Nellis, WJ
TI Metallization of fluid molecular hydrogen at 140 GPa (1.4 mbar)
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID SOLID HYDROGEN; HIGH-DENSITY; ELECTRICAL-CONDUCTIVITY; MEGABAR
PRESSURES; SHOCK COMPRESSION; EQUATION; STATE; DEUTERIUM; TRANSITION;
SYSTEM
AB Electrical resistivities were measured for liquid H-2 and D-2 shock compressed to pressures of 93-180 GPa (0.93-1.8 Mbar). Calculated densities and temperatures were in the range 0.28-0.36 mol/cm(3) and 2200-4400 K. Resistivity decreases almost 4 orders of magnitude from 93 to 140 GPa and is essentially constant at a value typical of a liquid metal from 140 to 180 GPa. The data are interpreted in terms of a continuous transition from a semiconducting to metallic diatomic fluid at 140 GPa and 3000 K.
RP Weir, ST (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550, USA.
RI Weir, Samuel/H-5046-2012
NR 37
TC 520
Z9 531
U1 3
U2 29
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 11
PY 1996
VL 76
IS 11
BP 1860
EP 1863
DI 10.1103/PhysRevLett.76.1860
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ282
UT WOS:A1996TZ28200025
ER
PT J
AU Campbell, IH
Hagler, TW
Smith, DL
Ferraris, JP
AF Campbell, IH
Hagler, TW
Smith, DL
Ferraris, JP
TI Direct measurement of conjugated polymer electronic excitation energies
using metal/polymer/metal structures
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID DIODES
AB We report electroabsorption measurements of built-in electric fields and internal photoemission measurements of Schottky barriers to determine the charge transfer and single-particle energy gaps of the conjugated polymer poly[2-methoxy, 5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] (MEH-PPV). For MEH-PPV, with an exciton absorption peak of 2.25 eV, or results yield a single-particle energy gap of 2.45 eV and a charge transfer energy gap of at least 2.35 eV. Therefore the exciton binding energy is 0.2 eV and the bipolaron binding energy is less than 0.1 eV.
C1 UNIV TEXAS,RICHARDSON,TX 75083.
RP Campbell, IH (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA.
NR 16
TC 370
Z9 372
U1 0
U2 54
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 11
PY 1996
VL 76
IS 11
BP 1900
EP 1903
DI 10.1103/PhysRevLett.76.1900
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ282
UT WOS:A1996TZ28200035
ER
PT J
AU Suh, BJ
Borsa, F
Sok, J
Torgeson, DR
Corti, M
Rigamonti, A
Xiong, Q
AF Suh, BJ
Borsa, F
Sok, J
Torgeson, DR
Corti, M
Rigamonti, A
Xiong, Q
TI Thermal depinning of flux lines in HgBa2CuO4+delta from Hg-199
spin-lattice relaxation
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID HIGH-TEMPERATURE SUPERCONDUCTORS; MAGNETIC-FIELD DEPENDENCE; Y-89 NMR;
VORTEX DYNAMICS; ANISOTROPY; YBA2CU3O7; MOTION; SUSCEPTIBILITY;
FLUCTUATIONS; PENETRATION
AB Hg-199 NMR spin-lattice relaxation rates in an aligned powder sample of the anisotropic high-T-c superconductor HgBa2CuO4+delta (T-c = 96 K) show anisotropy in the temperature interval 10-50 K, with an extra contribution present for the external magnetic field parallel to the c axis. The extra contribution shifts with magnetic field in a way related to the irreversibility temperature T-irr indicating that the thermal motion of flux lines (FL's) is the cause of the extra relaxation. A simple model is presented to analyze the relaxation data and to extract values for the correlation time tau(c) and the effective activation;energy U of the FL motion.
C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS & ASTRON,AMES,IA 50011.
UNIV PAVIA,DIPARTIMENTO FIS A VOLTA,INTERUNIV FIS METERIA,I-27100 PAVIA,ITALY.
UNIV ARKANSAS,DEPT PHYS,HIGH DENS ELECT CTR,FAYETTEVILLE,AR 72701.
RP Suh, BJ (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA.
NR 30
TC 23
Z9 23
U1 0
U2 3
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 11
PY 1996
VL 76
IS 11
BP 1928
EP 1931
DI 10.1103/PhysRevLett.76.1928
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TZ282
UT WOS:A1996TZ28200042
ER
PT J
AU Szapudi, I
Szalay, AS
AF Szapudi, I
Szalay, AS
TI Effects of sampling on measuring galaxy count probabilities
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies, statistics; methods, statistical
ID CLUSTER CORRELATIONS; STATISTICS; UNIVERSE; MATTER
AB We investigate in detail the effects of sampling on our ability to accurately reconstruct the distribution of galaxies from galaxy surveys. We use a simple probability theory approach, Bayesian classifier theory and Bayesian transition probabilities. We find the best Bayesian estimator for the case of low sampling rates and show that even in the optimal case certain higher order characteristics of the distribution are irretrievably washed out by sparse sampling: we illustrate this by a simple model for cluster selection. We show that, even choosing an optimal threshold, there are nonzero numbers for both misidentified clusters and true clusters that are missed. The introduction of sampling has an effect on the distribution function that is similar to convolution. Deconvolution is possible and given in the paper, although it might become unstable as sampling rates become low. These findings have important consequences on planning and strategies of future galaxy surveys.
C1 JOHNS HOPKINS UNIV, DEPT PHYS & ASTRON, BALTIMORE, MD 21218 USA.
EOTVOS LORAND UNIV, DEPT PHYS, BUDAPEST, HUNGARY.
RP Szapudi, I (reprint author), FERMILAB ASTROPHYS CTR, MS-209, POB 500, BATAVIA, IL 60510 USA.
NR 19
TC 11
Z9 11
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD MAR 10
PY 1996
VL 459
IS 2
BP 504
EP 508
DI 10.1086/176913
PN 1
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA TX195
UT WOS:A1996TX19500010
ER
PT J
AU Ryutova, MP
Kaisig, M
Tajima, T
AF Ryutova, MP
Kaisig, M
Tajima, T
TI The evolution of magnetic structures due to ''magnetosonic streaming''
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE MHD; sun, magnetic fields
ID ALFVEN WAVES; SOUND-WAVES; PROPAGATION; PHOTOSPHERE; FIELDS; FLUX
AB The Faraday effect in gasdynamics called acoustic streaming and its accompanying nonlinear phenomena have analogies in plasma magnetohydrodynamics. A natural place where these effects may occur is the solar atmosphere with its strongly inhomogeneous magnetic fields concentrated in random magnetic flux tubes. Unlike acoustic streaming in the usual gasdynamics, nonlinear phenomena consisting in the generation of plasma flows by an oscillating magnetic flux tube, ''magnetosonic streaming'' (Ryutova 1986), is accompanied by a current drive and results in a specific evolution of magnetic structures: depending on the physical parameters of the medium a single magnetic flux tube may be either split into thinner flux tubes or dissolved diffusively into the ambient plasma. The effect of the ''magnetosonic streaming,'' on one hand, is an obvious candidate for the generation of mass flows at magnetic flux tubes sites, and on the other hand, it plays an essential role in the evolution of magnetic structures and ultimately may determine their lifetime. The theory of magnetosonic streaming is general and can be applied to other astrophysical objects that maintain oscillatory motions and contain structured magnetic fields or magnetic domains. We review analytical results and describe the origin of the magnetosonic streaming in magnetic flux tubes due to their interaction with acoustic waves. We study numerically the regime of the ''magnetosonic streaming'' corresponding to splitting of a magnetic flux tube. Our computer simulation supports and extends the analytical result.
C1 UNIV TEXAS, DEPT PHYS, AUSTIN, TX 78712 USA.
UNIV TEXAS, INST FUS STUDIES, AUSTIN, TX 78712 USA.
RP Ryutova, MP (reprint author), LAWRENCE LIVERMORE NATL LAB, INST GEOPHYS & PLANETARY PHYS, L-413, LIVERMORE, CA 94550 USA.
NR 34
TC 8
Z9 8
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD MAR 10
PY 1996
VL 459
IS 2
BP 744
EP 759
DI 10.1086/176939
PN 1
PG 16
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA TX195
UT WOS:A1996TX19500036
ER
PT J
AU Garcia, HE
Ray, A
AF Garcia, HE
Ray, A
TI State-space supervisory control of reconfigurable discrete event systems
SO INTERNATIONAL JOURNAL OF CONTROL
LA English
DT Article
AB The discrete event theory of supervisory and state feedback control offers many advatages for implementing supervisory systems. Algorithmic concepts have been introduced to ensure that the supervising algorithms are correct and meet the specifications. In the current methodology, it is, in general, assumed that the supervisory specifications are invariant during the operation of the system or, at least, until a given supervisory task is completed. However, there are many practical applications where the supervising specifications need to be updated in real time. For example, when dealing with complex processes, the tasks of supervisory systems analysis and synthesis can be facilitated by partitioning the controlled Discrete-Event System (DES) into several subprocesses. This partitioning is based on operational or physical considerations and a unique supervisor is assigned to control each subprocess at a given instant of time. When a decision maker at a higher level of hierarchy decides to change the supervising algorithm, switching to a new supervisor takes place. For this adaptive implementation, the decision-maker or coordinator first decides the set of acting supervisors based on the requested supervisory tasks or current system performance requirements and then exercises control over the enabled supervisors in real time. Specifically, in a Reconfigurable Discrete Event System (RDES) architecture, a bank of supervisors is defined to accommodate each identified operational condition or different supervisory specifications. This adaptive supervisory control system can change its supervisory configuration to accept coordinator commands or to adjust for changes in the controlled process. This paper addresses reconfiguration at the supervisory level of hybrid systems along with the underlying architecture of RDES. In particular, the paper reviews the supervisory control theory in the state-based framework and extends it to the paradigm of RDES, considering process control applications. The paper addresses theoretical issues with a limited number of practical examples. This control approach is particularly suitable for hierarchical hybrid implementations with the capability of reconfiguration at both the control and supervisory levels.
C1 PENN STATE UNIV,DEPT MECH ENGN,UNIVERSITY PK,PA 16802.
RP Garcia, HE (reprint author), ARGONNE NATL LAB,POB 2528,IDAHO FALLS,ID 83403, USA.
NR 33
TC 12
Z9 12
U1 0
U2 1
PU TAYLOR & FRANCIS LTD
PI LONDON
PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE
SN 0020-7179
J9 INT J CONTROL
JI Int. J. Control
PD MAR 10
PY 1996
VL 63
IS 4
BP 767
EP 797
DI 10.1080/00207179608921868
PG 31
WC Automation & Control Systems
SC Automation & Control Systems
GA UD308
UT WOS:A1996UD30800007
ER
PT J
AU Schmeling, H
Bussod, GY
AF Schmeling, H
Bussod, GY
TI Variable viscosity convection and partial melting in the continental
asthenosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
ID LOW-VELOCITY ZONE; GRAIN-SIZE; MANTLE; PERIDOTITE; TEMPERATURE;
DEFORMATION; LITHOSPHERE; GENERATION; COMPACTION; THICKNESS
AB Convection beneath continents may be associated with the generation of partially molten zones at depth. Experimentally determined non-Newtonian, temperature-and pressure-dependent creep laws for olivine were used to model upper mantle convection in the presence and absence of a melt phase. In our models, convection is chaotic and exhibits a strong time dependence. Using model ''dry'' and ''water-undersaturated'' solidus relations, partially molten regions develop at asthenospheric depths forming low-viscosity regions. The existence of these regions is linked to convection and consequently varies in space and time with an episodicity of 5 to 10 m.y., in good agreement with observations based on seismic tomography and the episodicity and volumetric abundance of surface volcanics. For an average continental heat flux of about 53.3 mW/m(2), maximum melt fractions range between 0 and 2% (dry solidus) and 2 and 4% (water-undersaturated solidus). On the basis of experimental deformation studies, we employed an empirical relationship between stress and grain size to assess the grain size variations possible in the upper mantle. The grain sizes obtained (millimeters to centimeters) are in good agreement with grain sizes observed in natural examples. The smallest grain sizes occur along narrow zones of high stress within the deepest part of the lithosphere. The largest grain sizes are found in the overlying lithosphere and in partially molten asthenospheric regions. As our models scale well to natural observations, these results appear to preclude diffusion creep (n = 1) as a viable upper mantle steady state deformation mechanism.
C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA.
UNIV BAYREUTH, BAYER GEOINST, W-8580 BAYREUTH, GERMANY.
NR 40
TC 27
Z9 27
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD MAR 10
PY 1996
VL 101
IS B3
BP 5411
EP 5423
DI 10.1029/95JB01154
PG 13
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA UA372
UT WOS:A1996UA37200002
ER
PT J
AU Vogel, TA
Aines, R
AF Vogel, TA
Aines, R
TI Melt inclusions from chemically zoned ash flow sheets from the Southwest
Nevada Volcanic Field
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
ID VALLEY CALDERA COMPLEX; LAYERED MAGMA BODY; CARBON-DIOXIDE; LIQUID
FRACTIONATION; SILICATE-GLASSES; TIMBER MOUNTAIN; NEW-MEXICO; WATER;
EVOLUTION; CHAMBERS
AB The purpose of this paper is to determine whether melt inclusions from three well studied, compositionally zoned ash flow sheets from the Southwest Nevada Volcanic Field can be used to determine the evolution of the parent magma bodies. All samples are from the quenched, glassy pumice fragments that occur in the upper and lower portions of the Topopah Spring Tuff (68.7-78.7% SiO2), the Rainier Mesa Tuff (55.0-76.3% SiO2), and the Ammonia Tanks Tuff (57.5-76.3% SiO2) (all SiO2 values anhydrous). Most of the melt inclusions in this study are in feldspar; a few are in quartz. There are large variations of volatile concentrations in melt inclusions within an individual phenocryst and large variations in melt inclusions in different phenocrysts within a pumice fragment. This finding demonstrates that the volatiles did not reequilibrate after the formation of the ash flow sheet. The volatile contents of most of these melt inclusions represent decompression and loss of some volatiles and therefore do not represent conditions at the time of entrapment. The presence of CO2 in many inclusions demonstrates that the magma evolved a gas phase in its preeruption evolution. The nonvolatile chemical variations of the melt inclusions from the Rainier Mesa and Ammonia Tanks Tuffs are similar. Melt inclusions from the lower-silica pumice fragments show a wide range of chemical variation and monitor the liquid as it evolved. In both tuffs some melt inclusions are significantly more silica-rich than the matrix glass, and indicate mixing with a more evolved magma. Most melt inclusions from the high-silica pumice fragments from each of these tuffs show little chemical variation and are similar to the matrix glass. The fact that no lower-silica melt inclusions occur in the high-silica pumice fragments supports the model that the high-silica magma did not evolve from the low-silica magma. The maximum H2O concentrations of inclusions in each pumice fragment from the Rainier Mesa and Ammonia Tanks Tuffs show a general positive correlation with SiO2 concentrations of the pumice fragment. No such relationship is observed with the Topopah Spring Tuff.
C1 LAWRENCE LIVERMORE NATL LAB, DEPT EARTH SCI, LIVERMORE, CA 94550 USA.
RP MICHIGAN STATE UNIV, DEPT GEOL SCI, E LANSING, MI 48824 USA.
RI Aines, Roger/A-2013-2013
NR 59
TC 18
Z9 18
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD MAR 10
PY 1996
VL 101
IS B3
BP 5591
EP 5610
DI 10.1029/95JB03252
PG 20
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA UA372
UT WOS:A1996UA37200017
ER
PT J
AU Bouchon, M
Schultz, CA
Toksoz, MN
AF Bouchon, M
Schultz, CA
Toksoz, MN
TI Effect of three-dimensional topography on seismic motion
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Article
ID WAVE-NUMBER REPRESENTATION; GROUND MOTION; SURFACE IRREGULARITIES;
SH-WAVES; RAYLEIGH-WAVES; ELASTIC-WAVES; NORESS ARRAY; SV-WAVE; P-WAVE;
DIFFRACTION
AB We present a semianalytical, seminumerical method to calculate the diffraction of elastic waves by an irregular topography of arbitrary shape. The method is a straightforward extension to three dimensions of the approach originally developed to study the diffraction of SH waves [Bouchon, 1985] and P-SV waves [Gaffet and Bouchon, 1989] by two-dimensional topographies. It relies on a boundary integral equation scheme formulated in the frequency domain where the Green functions are evaluated by the discrete wavenumber method. The principle of the method is simple. The diffracted wave field is represented as the integral over the topographic surface of an unknown source density function times the medium Green functions. The Green functions are expressed as integrals over the horizontal wavenumbers. The introduction of a spatial periodicity of the topography combined with the discretization of the surface at equal intervals results in a discretization of the wavenumber integrals and in a periodicity in the horizontal wavenumber space. As a result, the Green functions are expressed as finite sums of analytical terms. The writing of the boundary conditions of free stress at the surface yields a linear system of equations where the unknowns are the source density functions representing the diffracted wave field. Finally, this system is solved iteratively using the conjugate gradient approach. We use this method to investigate the effect of a hill on the ground motion produced during an earthquake. The hill considered is 120 m high and has an elliptical base and ratios of height-to-half-width of 0.2 and 0.4 along its major and minor axes. The results obtained show that amplification occurs at and near the top of the hill over a broad range of frequencies. For incident shear waves polarized along the short dimension of the hill the amplification at the top reaches 100% around 10 Hz and stays above 50% for frequencies between 1.5 Hz and 20 Hz. For incident shear waves polarized along the direction of elongation bf the topography, the maximum amplification occurs between 2 Hz and 5 Hz with values ranging from 50% to 75%. The results also show that the geometry of the topography exerts a very strong directivity on the wave field diffracted away from the hill and that at some distance from the hill this diffracted wave field consists mostly of Rayleigh waves.
C1 LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94551 USA.
MIT, EARTH RESOURCES LAB, CAMBRIDGE, MA 02139 USA.
RP UNIV GRENOBLE 1, LAB GEOPHYS INTERNE & TECTONOPHYS, BP 53X, F-38041 GRENOBLE, FRANCE.
NR 64
TC 87
Z9 93
U1 0
U2 6
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD MAR 10
PY 1996
VL 101
IS B3
BP 5835
EP 5846
DI 10.1029/95JB02629
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA UA372
UT WOS:A1996UA37200034
ER
PT J
AU Smith, RP
Jackson, SM
Hackett, WR
AF Smith, RP
Jackson, SM
Hackett, WR
TI Paleoseismology and seismic hazards evaluations in extensional volcanic
terrains
SO JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
LA English
DT Review
ID SNAKE RIVER PLAIN; WESTERN UNITED-STATES; SURFACE DEFORMATION; DIKE
INTRUSION; LAVA FLOWS; RIFT ZONES; COSMOGENIC HE-3; RUPTURE PROCESS;
SEPTEMBER 1977; NORTH ICELAND
AB Extensional structures in volcanic terrains are the surface expression of shallow dike intrusion and can be misinterpreted as structures associated with major tectonic faults. Dike-induced structures can be distinguished from their tectonic counterparts by their association with cogenetic volcanic rocks and by several geometric relationships. Tensile fissures with little or no vertical displacement, fissure swarms, flexural monoclines, and normal faults are commonly symmetrically distributed about a central eruptive fissure, sometimes forming a graben above shallow dikes. The structures typically occur within broad zones, not narrow belts near a main fault zone, reflecting their origin by repeated dike injection. Colluvial wedges containing records of single large earthquakes generally do not form; instead, fault scarps with several-meter vertical displacements in volcanic bedrock may reflect the cumulative effects of many decimeter-scale displacement events from several dike injection episodes. The mechanism of dike intrusion and the nature of cointrusive seismicity have important implications for determination of the maximum magnitude and recurrence of earthquakes in extensional volcanic terrains. Observational seismicity from volcanic rift zones worldwide suggests the maximum magnitudes of dike-induced earthquakes are 3.8 +/- 0.8. Earthquakes are generally small to moderate because downdip extents of faults and fissures are controlled by the depth to the top of the associated dike (usually <5 km), permitting only small rupture areas. Also, rupture and displacement on faults and fissures migrate incrementally at about the velocity of propagating dikes (0.5 m/s) as dike dilation stresses the zone above and ahead of the dike. Earthquake recurrence is tied to recurrence of volcanic cycles based on the geochronology of the associated volcanic materials. Based on these concepts, innovative approaches have led to estimates of the maximum magnitude and recurrence for magma-induced seismicity in eastern Snake River Plain (ESRP) volcanic rift zones. The most conservative approach uses surface length, fault width (downdip extent), and rupture areas of normal faults and fissures produced by dike injection to estimate a maximum M5.5 earthquake for an episode of rift zone volcanism. Chronology of volcanic rocks suggests annual probabilities of 10(-4) to 10(-5) for volcanic rift zones near Idaho National Engineering Laboratory facilities. Probabilistic assessments show that ground motion hazard due to volcanic rift zone seismicity is lower than the hazard from other earthquake sources. This is because of the relatively low magnitudes and long recurrence intervals of cointrusive earthquakes in volcanic rift zones.
C1 WRH ASSOCIATES, SALT LAKE CITY, UT 84117 USA.
RP LOCKHEED IDAHO TECHNOL CO, IDAHO NATL ENGN LAB, POB 1625, MAIL STOP 2107, IDAHO FALLS, ID 83415 USA.
NR 102
TC 24
Z9 24
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9313
EI 2169-9356
J9 J GEOPHYS RES-SOL EA
JI J. Geophys. Res.-Solid Earth
PD MAR 10
PY 1996
VL 101
IS B3
BP 6277
EP 6292
DI 10.1029/95JB01393
PG 16
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA UA372
UT WOS:A1996UA37200061
ER
PT J
AU Weare, CB
Yarmoff, JA
AF Weare, CB
Yarmoff, JA
TI Resonant neutralization of Li-7(+) scattered from alkali/Al(100) as a
probe of the local electrostatic potential
SO SURFACE SCIENCE
LA English
DT Article
DE adatoms; alkali metals; aluminum; ion-solid interactions; low energy ion
scattering (LEIS); low index single crystal surfaces; metallic surfaces;
surface electronic phenomena
ID CHARGE-EXCHANGE; ION-SCATTERING; ALKALI ADSORBATES; ENERGY SHIFTS;
SURFACES; AL(111); CU(110); LI+; NA
AB Time-of-flight detection is used to measure the neutralization probabilities for 1.2 and 2.0 keV Li-7(+) ions scattered from alkali-adsorbate-covered Al(100) surfaces. At low coverages, the neutral fractions for single scattering from adsorbate and substrate sites differ significantly while, at larger coverages, they are nearly equal. This change denotes a transition in the surface local electrostatic potential (LEP) from being spatially inhomogeneous to becoming homogeneous. The measured neutral fractions are compared to a quantum mechanical multi-state model of resonant charge transfer that includes the inhomogeneous adsorbate-induced part of the LEP. When the adsorbate-induced potential is modeled as the sum of isolated dipoles, good agreement between theory and experiment is obtained for single scattering from substrate atoms.
C1 UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720.
NR 27
TC 80
Z9 80
U1 0
U2 4
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0039-6028
J9 SURF SCI
JI Surf. Sci.
PD MAR 10
PY 1996
VL 348
IS 3
BP 359
EP 369
DI 10.1016/0039-6028(95)01013-0
PG 11
WC Chemistry, Physical; Physics, Condensed Matter
SC Chemistry; Physics
GA UA262
UT WOS:A1996UA26200016
ER
PT J
AU Bernholdt, DE
Harrison, RJ
AF Bernholdt, DE
Harrison, RJ
TI Large-scale correlated electronic structure calculations: The RI-MP2
method on parallel computers
SO CHEMICAL PHYSICS LETTERS
LA English
DT Article
ID 4-INDEX TRANSFORMATION; BASIS-SETS; VECTOR; APPROXIMATIONS;
ARCHITECTURES
AB The approximate 'resolution of the identity' second-order many-body perturbation theory method (RI-MP2) recently introduced by Feyereisen, Fitzgerald and Komornicki utilizes a combination of two- and three-center integrals to approximate the usual four-center two-electron repulsion integrals, Like the exact MP2, the overall cost of the RI-MP2 method scales with the fifth power of the number of basis functions, however the balance of the work shifts in such a way as to make the RI-MP2 method particularly well suited for implementation on massively parallel computers. We describe such an implementation and examine its parallel performance for several chemical systems. We are able to accurately reproduce the exact MP2 binding energy of K+ to 12-crown-4 ether in roughly 5% of the time.
C1 PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA.
NR 34
TC 135
Z9 135
U1 0
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0009-2614
J9 CHEM PHYS LETT
JI Chem. Phys. Lett.
PD MAR 8
PY 1996
VL 250
IS 5-6
BP 477
EP 484
DI 10.1016/0009-2614(96)00054-1
PG 8
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UB322
UT WOS:A1996UB32200008
ER
PT J
AU Merdink, JL
Stenner, RD
Stevens, DK
Parker, JC
Bull, RJ
AF Merdink, JL
Stenner, RD
Stevens, DK
Parker, JC
Bull, RJ
TI Contribution of enterohepatic circulation on the disposition of chloral
hydrate metabolites
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 WASHINGTON STATE UNIV, GRAD PROGRAM PHARMACOL TOXICOL, PULLMAN, WA 99164 USA.
PACIFIC NW LAB, RICHLAND, WA 99352 USA.
US EPA, NCEA, WASHINGTON, DC 20460 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 1003
EP 1003
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28401005
ER
PT J
AU Stauber, AJ
Bull, ME
Bull, RJ
AF Stauber, AJ
Bull, ME
Bull, RJ
TI Modes of action of dichloroacetate (DCA) and trichloroacetate (TCA)
induced hepatocarcinogenesis differ
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 WASHINGTON STATE UNIV, PHARMACOL TOXICOL GRAD PROGRAM, PULLMAN, WA 99164 USA.
PACIFIC NW LAB, RICHLAND, WA 99352 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 1050
EP 1050
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28401052
ER
PT J
AU Kim, JH
Mynatt, R
Moore, JW
Woychik, R
Moustaid, N
Zemel, M
AF Kim, JH
Mynatt, R
Moore, JW
Woychik, R
Moustaid, N
Zemel, M
TI The effects of calcium channel blockade on agouti-induced obesity
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
UNIV TENNESSEE,KNOXVILLE,TN 37996.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 1077
EP 1077
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28401077
ER
PT J
AU Yasumura, S
Stamatelatos, IE
Ma, R
Boozer, CN
Pierson, RN
AF Yasumura, S
Stamatelatos, IE
Ma, R
Boozer, CN
Pierson, RN
TI Body composition in rats: In vivo neutron activation vs carcass analysis
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973.
ST LUKES HOSP,OBES RES CTR,NEW YORK,NY 10025.
ST LUKES HOSP,BODY COMPOSIT UNI,NEW YORK,NY 10025.
INST NUCL TECH DEMOKRITOS,GR-15310 ATHENS,GREECE.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 1202
EP 1202
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28401202
ER
PT J
AU Razor, J
Sulzer, B
Bold, J
Paar, J
Gorman, W
Farris, JA
Perelson, A
Posner, R
AF Razor, J
Sulzer, B
Bold, J
Paar, J
Gorman, W
Farris, JA
Perelson, A
Posner, R
TI Aggregation of IgE-receptor complexes by multivalent antigens:
Quantifying crosslinking at the cell surface.
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 NO ARIZONA UNIV,DEPT CHEM,FLAGSTAFF,AZ 86011.
LOS ALAMOS NATL LAB,THEORET BIOL GRP,LOS ALAMOS,NM 87545.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 1492
EP 1492
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28401490
ER
PT J
AU Onaivi, ES
Chakrabarti, A
McDuffie, I
Chittenden, LR
Stubbs, L
Chaudhuri, G
AF Onaivi, ES
Chakrabarti, A
McDuffie, I
Chittenden, LR
Stubbs, L
Chaudhuri, G
TI Genes encoding marijuana receptors and their chromosomal localization
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 MEHARRY MED COLL,NASHVILLE,TN 37208.
ELIZABETH CITY STATE UNIV,ELIZABETH CITY,NC 27909.
OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 1730
EP 1730
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28401728
ER
PT J
AU Sinha, R
Brown, E
Rothman, N
Swanson, C
Knize, M
Felton, J
Levander, O
AF Sinha, R
Brown, E
Rothman, N
Swanson, C
Knize, M
Felton, J
Levander, O
TI Exposure assessment of heterocyclic amines (HCAs) in epidemiologic
studies.
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 NCI,NIH,BETHESDA,MD 20892.
USDA,BHNRC,NRFL,BELTSVILLE,MD 20705.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
NR 0
TC 1
Z9 1
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 3172
EP 3172
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28403172
ER
PT J
AU Pierson, RN
Wang, J
Ma, RM
Nelson, ME
Heymsfield, SB
Kotler, DP
Thornton, JC
Kehayias, JJ
AF Pierson, RN
Wang, J
Ma, RM
Nelson, ME
Heymsfield, SB
Kotler, DP
Thornton, JC
Kehayias, JJ
TI Measuring body fat from carbon vs dual X-ray and multi-compartment
models.
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 TUFTS UNIV,MEDFORD,MA 02155.
BROOKHAVEN NATL LAB,UPTON,NY 11973.
COLUMBIA UNIV,ST LUKES ROOSEVELT HOSP,NEW YORK,NY 10025.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 4244
EP 4244
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28404245
ER
PT J
AU Griffin, GD
Miller, EJ
Gailey, PC
AF Griffin, GD
Miller, EJ
Gailey, PC
TI Real-time monitoring of melatonin-induced gene expression in breast
tumor cells transfected with a luc reporter gene.
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
NR 0
TC 0
Z9 0
U1 0
U2 1
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 4381
EP 4381
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28404380
ER
PT J
AU Cook, RJ
Champion, KM
Giometti, CS
AF Cook, RJ
Champion, KM
Giometti, CS
TI Histidine and formate oxidation by homozygous NEUT2 mice.
SO FASEB JOURNAL
LA English
DT Meeting Abstract
C1 VANDERBILT UNIV,SCH MED,DEPT BIOCHEM,NASHVILLE,TN 37323.
ARGONNE NATL LAB,CTR MECHANIST BIOL & BIOTECHNOL,ARGONNE,IL 60439.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU FEDERATION AMER SOC EXP BIOL
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814-3998
SN 0892-6638
J9 FASEB J
JI Faseb J.
PD MAR 8
PY 1996
VL 10
IS 3
BP 4627
EP 4627
PG 1
WC Biochemistry & Molecular Biology; Biology; Cell Biology
SC Biochemistry & Molecular Biology; Life Sciences & Biomedicine - Other
Topics; Cell Biology
GA TZ284
UT WOS:A1996TZ28404629
ER
PT J
AU Knickelbein, MB
AF Knickelbein, MB
TI The infrared photodissociation spectra of Fe-n(CH3OH)(m) complexes and
their deuterated analogs near 10 mu
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID COLLISION-INDUCED DISSOCIATION; TRANSITION-METAL CLUSTERS; IRON
CLUSTERS; IONIZATION-POTENTIALS; SPECTROSCOPY; METHANOL;
PHOTOIONIZATION; DECOMPOSITION; ENERGIES; BINDING
AB The infrared photodissociation spectra of Fe-n(CH3OH)(m), Fe-n(CH3OD)(m), Fe-n(CD3OH)(m), and Fe-n(CD3OD)(m) (n = 5-15; m = 1,2) have been recorded from 920-1090 cm(-1). Analysis of the spectral features indicates that in all cases, molecularly adsorbed methanol is the absorbing chromophore, with no evidence of methoxy formation. The observed frequencies for the C-O stretching vibration and other vibrational modes are shifted similar to 40 cm(-1) to the red of the corresponding fundamentals of gas-phase methanol. The spectral shifts and thus the magnitude of the cluster-methanol interaction are observed to be independent of iron cluster size over the size range studied, implying an insensitivity of the interaction to the underlying cluster structure. (C) 1996 American Institute of Physics.
RP Knickelbein, MB (reprint author), ARGONNE NATL LAB, DIV CHEM, 9700 S CASS AVE, ARGONNE, IL 60439 USA.
NR 33
TC 28
Z9 28
U1 2
U2 4
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-9606
EI 1089-7690
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 8
PY 1996
VL 104
IS 10
BP 3517
EP 3525
DI 10.1063/1.471014
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TX780
UT WOS:A1996TX78000014
ER
PT J
AU Parks, EK
Nieman, GC
Riley, SJ
AF Parks, EK
Nieman, GC
Riley, SJ
TI The reaction of manganese clusters and manganese cluster carbides with
hydrogen: The Mn-CH3 bond energy
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID TEMPERATURE-DEPENDENCE; MERCURY CLUSTERS; TRANSITION; RESONANCE;
DEUTERIUM; ATOMS; MN-2; IONS
AB Manganese clusters are formed by laser vaporization in an inert gas condensation source cooled to -160 degrees C. A pure manganese target is used as well as a manganese target containing 2 mol % carbon. The clusters are reacted with hydrogen both in the region of cluster growth and in a flow-tube reactor (FTR) downstream of the cluster source. The reactions, both with hydrogen atoms in the cluster growth region and dissociative chemisorption of H-2 in the FTR, result in hydrogen atoms bound to the clusters, except that for Mn-15 and smaller clusters the H atoms are unstable against H-2 desorption. Above Mn-15 stable hydrides are formed, but the rate of reaction in the FTR varies considerably with cluster size. This abrupt change in the ability to bind hydrogen may reflect a significant change in the character of the bonding within the cluster, perhaps from van der Waals to metallic. MnnC clusters readily react with hydrogen for n>6 to form MnnCH2. Further reactivity generally follows the pattern of the bare clusters, suggesting that the two hydrogen atoms on MnnCH2 are bound to the carbon. Under certain conditions a large intensity of MnnCH3 species (n greater than or equal to 1) is seen. From these results and earlier reports of reactions of Mn with various hydrocarbons, an energy of 1.21 +/- 0.09 eV is determined for the Mn-CH3 bond. (C) 1996 American Institute of Physics.
C1 MONMOUTH COLL, DEPT CHEM, MONMOUTH, IL 61642 USA.
RP Parks, EK (reprint author), ANL, DIV CHEM, 9700 S CASS AVE, ARGONNE, IL 60439 USA.
NR 23
TC 19
Z9 19
U1 2
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
MELVILLE, NY 11747-4501 USA
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 8
PY 1996
VL 104
IS 10
BP 3531
EP 3536
DI 10.1063/1.471058
PG 6
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TX780
UT WOS:A1996TX78000016
ER
PT J
AU Gezelter, JD
Miller, WH
AF Gezelter, JD
Miller, WH
TI Dynamics of the photodissociation of triplet ketene
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID RATE CONSTANTS; PHOTOFRAGMENTATION; DISSOCIATION; CH2(X3B1); SYSTEMS
AB Calculations of the microcanonical dissociation rate for vibrationally excited ketene on the first excited tripler surface (T-1) are presented. The calculations utilize the quantum reactive scattering methodology of absorbing boundary conditions (ABC) with a discrete variable representation (DVR) to obtain the cumulative reaction probability for dissociation over the barrier. Model 1- and 2-degree of freedom potential energy surfaces for the T, surface were obtained by fitting to the best available ab initio structures, energies, and frequencies. The dissociation rates in these reduced-dimensionality calculations give good overall agreement with the experimentally measured rates, although the steplike features seen in the experiments are washed out by the tunneling through the narrow barrier predicted in the ab initio calculations. Further model calculations reveal that a barrier frequency of approximately 50-100i cm(-1) is required to recover the step structure seen experimentally, which suggests that there is either another transition state region on the T, surface farther out towards the product channel, or that there is surface-hopping dynamics taking place between the T-1 and S-0 ketene potential energy surfaces, or that the ab initio barrier frequency is simply too large. (C) 1996 American Institute of Physics.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV CHEM SCI,BERKELEY,CA 94720.
RP Gezelter, JD (reprint author), UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720, USA.
RI Gezelter, J. Daniel/D-1894-2010
OI Gezelter, J. Daniel/0000-0002-2935-3163
NR 35
TC 22
Z9 22
U1 0
U2 1
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 8
PY 1996
VL 104
IS 10
BP 3546
EP 3554
DI 10.1063/1.471059
PG 9
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TX780
UT WOS:A1996TX78000018
ER
PT J
AU Qian, H
AF Qian, H
TI Prediction of alpha-helices in proteins based on thermodynamic
parameters from solution chemistry
SO JOURNAL OF MOLECULAR BIOLOGY
LA English
DT Article
DE alanine-based peptides; hydrophobic moment; helix-coil theory; protein
folding; neural network
ID SECONDARY STRUCTURE PREDICTION; OCCURRING AMINO-ACIDS; SEQUENCES;
STABILITY
AB Current studies on the protein folding problem are chiefly pursued by two approaches; one statistically investigates the three-dimensional structures of proteins and the other focuses on their thermodynamic properties in solution. It remains to be demonstrated that information from these two sources are consistent and complementary Using two sets of thermodynamic parameters experimentally obtained from solution studies, namely the helix propensities derived from small model peptides and hydrophobicity based on solvent transfer free energies for amino acids, we predict alpha-helices in native proteins. The correlation coefficient of our predictions on 98 non-homologous proteins is 0.26, a value comparable to that of the statistical prediction of Chou & Fasman but less than that from the state of the art prediction (0.39) based on neural network methodology. Helix propensities derived from different experimental systems in aqueous solutions are highly consistent for predicting alpha-helices in proteins. The helix propensities and amphiphilicity in primary sequences make independent contributions to the occurrence of alpha-helices. We also show that, with appropriate models, statistical analyses of known three-dimensional structures can provide thermodynamically relevant quantities. These findings indicate that for practical helix prediction, various sets of propensities have reached reasonable consensus. The report also suggests integrating solution thermodynamic studies with protein structural analyses, and the role of supersecondary structures on helices in proteins. (C) 1996 Academic Press Limited
C1 UNIV CALIF LOS ANGELES,DOE,LAB STRUCT BIOL & MOLEC MED,LOS ANGELES,CA 90095.
RP Qian, H (reprint author), UNIV CALIF LOS ANGELES,DEPT BIOMATH,LOS ANGELES,CA 90095, USA.
NR 20
TC 11
Z9 11
U1 0
U2 0
PU ACADEMIC PRESS LTD
PI LONDON
PA 24-28 OVAL RD, LONDON, ENGLAND NW1 7DX
SN 0022-2836
J9 J MOL BIOL
JI J. Mol. Biol.
PD MAR 8
PY 1996
VL 256
IS 4
BP 663
EP 666
DI 10.1006/jmbi.1996.9999
PG 4
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA TX629
UT WOS:A1996TX62900001
PM 8642588
ER
PT J
AU Sigman, ME
Chevis, EA
Brown, A
Barbas, JT
Dabestani, R
Burch, EL
AF Sigman, ME
Chevis, EA
Brown, A
Barbas, JT
Dabestani, R
Burch, EL
TI Enhanced photoreactivity of acenaphthylene in water: A product and
mechanism study
SO JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
LA English
DT Article
DE acenaphthylene; photochemistry; aqueous solutions; photooxidation;
photodimerization
ID ORGANIC-PHOTOCHEMISTRY; PHOTO-DIMERIZATION; QUANTUM YIELDS; MEDIA;
FLUORESCENCE; ANTHRACENE; POLLUTANTS
AB Acenaphthylene undergoes direct photolysis in dilute aqueous solutions at concentrations as low as 5 x 10(-7) M. The reactivity observed for acenaphthylene in water greatly exceeds that observed in organic solvents. The major products from direct photolysis in aerated aqueous solutions at concentrations above 5 x 10(-5) M are the cis and trans dimers of acenaphthylene. Triplet-sensitized dimerization in water produces a large excess of cis dimer (cis/trans = 14); however, direct photolysis initially produces a small excess of cis dimer (cis/trans = 1.5) and upon further conversion the ratio changes to favor the trans dimer (cis/trans = 0.6). The origin of the trans dimer is assigned to photolysis of crystalline acenaphthylene which is thought to form as a coprecipitate with cis dimer during photolysis, The origin of the cis dimer is assigned to dimerization from the triplet manifold. The increased efficiency of acenaphthylene photolysis is attributed to a hydrophobic effect and partly to an enhanced efficiency of dimerization in crystalline acenaphthylene.
RP Sigman, ME (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,MS 6100,OAK RIDGE,TN 37831, USA.
NR 47
TC 12
Z9 12
U1 1
U2 2
PU ELSEVIER SCIENCE SA LAUSANNE
PI LAUSANNE 1
PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND
SN 1010-6030
J9 J PHOTOCH PHOTOBIO A
JI J. Photochem. Photobiol. A-Chem.
PD MAR 8
PY 1996
VL 94
IS 2-3
BP 149
EP 155
DI 10.1016/1010-6030(95)04099-4
PG 7
WC Chemistry, Physical
SC Chemistry
GA UE064
UT WOS:A1996UE06400011
ER
PT J
AU Wang, J
Pamidi, PVA
Renschler, CL
White, C
AF Wang, J
Pamidi, PVA
Renschler, CL
White, C
TI Metal-dispersed porous carbon films as electrocatalytic sensors
SO JOURNAL OF ELECTROANALYTICAL CHEMISTRY
LA English
DT Article
DE metal doping; electrocatalysis; carbon films
ID ELECTRODE; SYSTEM
AB The attractive features of ultrathin porous carbon films have been coupled with the efficient catalytic action of dispersed metal particles. In particular, loading of these submicrometer foams with ruthenium or platinum centers offers a dramatic increase in the electron transfer rates of important redox systems, such as NADH, uric acid, ascorbic acid, acetaminophen, hydrazine or hydrogen peroxide. Characterization of the electrocatalytic behavior (with respect to the pH, scan rate or metal loading) and the attractive low-potential analytical (sensing) performance are reported. Scanning electron microscopy sheds useful insights into the distribution of the metals within the porous electrode matrix.
C1 SANDIA NATL LABS,DIV 1812,ALBUQUERQUE,NM 87185.
RP Wang, J (reprint author), NEW MEXICO STATE UNIV,DEPT CHEM & BIOCHEM,LAS CRUCES,NM 88003, USA.
RI Wang, Joseph/C-6175-2011
NR 10
TC 28
Z9 28
U1 1
U2 5
PU ELSEVIER SCIENCE SA LAUSANNE
PI LAUSANNE 1
PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND
SN 0022-0728
J9 J ELECTROANAL CHEM
JI J. Electroanal. Chem.
PD MAR 7
PY 1996
VL 404
IS 1
BP 137
EP 142
DI 10.1016/0022-0728(95)04329-2
PG 6
WC Chemistry, Analytical; Electrochemistry
SC Chemistry; Electrochemistry
GA UH509
UT WOS:A1996UH50900015
ER
PT J
AU Wallen, SL
Palmer, BJ
Garrett, BC
Yonker, CR
AF Wallen, SL
Palmer, BJ
Garrett, BC
Yonker, CR
TI Density and temperature effects on the hydrogen bond structure of liquid
methanol
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID PRESSURE-DEPENDENCE; METHYL-ALCOHOL
AB The hydrogen bond structure of liquid methanol was investigated as a function of pressure and temperature up to 2.8 kbar and from 297 to 413 K. Chemical. shifts of the CH3 and OH groups were monitored throughout this pressure and temperature regime, and the chemical shift difference between these two groups was used to describe changes of the hydrogen bond network in methanol. The hydrogen bond equilibrium was investigated using molecular dynamics simulations and a phenomenological model describing clustering in liquid methanol. Results are presented concerning the size and distribution of hydrogen-bonded clusters in methanol as a function of pressure and temperature. The results indicate that the extent of hydrogen bonding decreases upon an increase in temperature. The results for pressure are equivocal, the phenomenological model suggests that hydrogen bonding decreases with increasing pressure, which supports earlier interpretations regarding the measured self-diffusion coefficients in deuterated methanol as a function of pressure. The molecular dynamics simulations, however, show an increase in hydrogen bonding with increasing pressure.
C1 PACIFIC NW LAB, DIV ENVIRONM & ENERGY SCI, RICHLAND, WA 99352 USA.
RI Garrett, Bruce/F-8516-2011
NR 26
TC 89
Z9 90
U1 0
U2 8
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 7
PY 1996
VL 100
IS 10
BP 3959
EP 3964
DI 10.1021/jp9524082
PG 6
WC Chemistry, Physical
SC Chemistry
GA TY919
UT WOS:A1996TY91900013
ER
PT J
AU Xantheas, SS
Dang, LX
AF Xantheas, SS
Dang, LX
TI Critical study of fluoride water interactions
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID LIQUID-LIQUID INTERFACE; MOLECULAR-DYNAMICS; BASIS-SETS; GAS-PHASE; CL
IONS; SOLVATION; CLUSTERS; COMPLEXES; ANION; LI+
AB A new parametrization of the fluoride-water interaction within a polarizable water model is presented. Because of the absence of accurate experimental data for the enthalpy of formation of the F-(H2O) cluster, the results of ab-initio calculations were used to parametrize the ion-water interaction. The ab-initio results suggest that this interaction is 10% stronger than what was previously thought. The accuracy of the present parametrization was evaluated by comparing the model potential with the ab-initio results along the minimum energy profile for the fluoride-water interaction for various F-O separations. The energetic and structural properties of the clusters F-(H2O)(n), n = 1-10, as well as of aqueous fluoride solution are studied using molecular dynamics simulation techniques. The stronger ion-water interaction results in the appearance of interior states (configurations in which the ion is ''solvated'' by water molecules) for finite clusters with six or more water molecules. The results of the aqueous ionic solution simulations provide a reasonable description of many structural and thermodynamic properties of the solvated ion such as the solvation enthalpy, the radial distribution function, and the hydration number.
RP Xantheas, SS (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, POB 999, RICHLAND, WA 99352 USA.
RI Xantheas, Sotiris/L-1239-2015;
OI Xantheas, Sotiris/0000-0002-6303-1037
NR 43
TC 89
Z9 89
U1 1
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 7
PY 1996
VL 100
IS 10
BP 3989
EP 3995
DI 10.1021/jp953114j
PG 7
WC Chemistry, Physical
SC Chemistry
GA TY919
UT WOS:A1996TY91900018
ER
PT J
AU Trout, BL
Chakraborty, AK
Bell, AT
AF Trout, BL
Chakraborty, AK
Bell, AT
TI Local spin density functional theory study of copper ion-exchanged ZSM-5
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID NITRIC-OXIDE; CATALYTIC DECOMPOSITION; NITROGEN MONOXIDE; NO
DECOMPOSITION; ZEOLITES; CU; REDUCTION; CU-ZSM-5; PSEUDOPOTENTIALS;
APPROXIMATIONS
AB We have used local spin density functional theory to investigate the electronic and structural properties of Cu species (Cu+, Cu2+O-, and Cu2+OH-) interacting with isolated =Al-O--Si= sites CuZSM-5. We have also evaluated the thermodynamic stability of these species and the thermodynamics of a proposed scheme for the autoreduction of Cu2+ to Cu+. We have found all of the species studied to be thermodynamically stable and the proposed autoreduction process to be thermodynamically feasible at temperatures normally encountered in the pretreatment of as-exchanged CuZSM-5. In addition, we have investigated the interactions of Cu2+ cations with both 6-T site and 5-T site ring structures containing two Al atoms. We have found that Cu2+ in a 6-T site ring structure is thermodynamically unstable, while that in a 5-T site ring structure is thermodynamically stable.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,DEPT CHEM ENGN,BERKELEY,CA 94720.
OI Bell, Alexis/0000-0002-5738-4645
NR 52
TC 89
Z9 91
U1 0
U2 9
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 7
PY 1996
VL 100
IS 10
BP 4173
EP 4179
DI 10.1021/jp9524744
PG 7
WC Chemistry, Physical
SC Chemistry
GA TY919
UT WOS:A1996TY91900042
ER
PT J
AU Mao, Y
Bakac, A
AF Mao, Y
Bakac, A
TI Photocatalytic oxidation of toluene to benzaldehyde by molecular oxygen
SO JOURNAL OF PHYSICAL CHEMISTRY
LA English
DT Article
ID ELECTRON-TRANSFER REACTIONS; EXCITED-STATES; URANYL-ION; RADICALS
AB The visible light irradiation of aqueous solutions containing toluene, uranyl(VI) ions, and O-2 results in the formation of benzaldehyde as a major product. Small amounts of PhCH(2)OH are also formed. The yields of benzaldehyde are 3 times greater for toluene-h(8) than for toluene-d(8), but the kinetic isotope effect for the quenching of the excited state *UO22+ by toluene is negligible (k(toluene-h8)/k(toluene-d8) = 1.2) This and other evidence indicate that the quenching takes place in two parallel pathways. The major one involves the aromatic portion of toluene and leads to the recovery of the reactants. The minor, productive path takes place by hydrogen atom abstraction from the methyl group, followed by the oxidation of PhCH(2)(.). Cumene, benzyl alcohol, and benzaldehyde react similarly.
C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
NR 36
TC 31
Z9 32
U1 2
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-3654
J9 J PHYS CHEM-US
JI J. Phys. Chem.
PD MAR 7
PY 1996
VL 100
IS 10
BP 4219
EP 4223
DI 10.1021/jp9529376
PG 5
WC Chemistry, Physical
SC Chemistry
GA TY919
UT WOS:A1996TY91900049
ER
PT J
AU Corbett, JD
AF Corbett, JD
TI Diverse solid-state clusters with strong metal-metal bonding. In praise
of synthesis
SO JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
LA English
DT Article; Proceedings Paper
CT 1st Dalton Discussion on Metal Clusters
CY JAN 03-05, 1996
CL UNIV SOUTHAMPTON, SOUTHAMPTON, ENGLAND
HO UNIV SOUTHAMPTON
ID ZIRCONIUM CHLORIDE CLUSTERS; TRANSITION-ELEMENTS; INTERSTITIAL ATOMS;
IODIDE CLUSTERS; INDIUM CLUSTERS; ZINTL-PHASES; INTERMETALLIC COMPOUNDS;
CRYSTAL-STRUCTURE; CHEMISTRY; ENCAPSULATION
AB The synthesis, structure and bonding of two types of metal clusters are described. A large family of zirconium cluster halides of the general type A(x)(1)Zr(6)(Z)X(12+n) are obtained with A = Na to Cs, X = Cl, Pr or I, 0 < x, n less than or equal to 6, and the required interstitial Z atom as variables. Extension to the rare-earth elements (Sc, Y, lanthanides) gives some new, hypostoichiometric cluster variations as well as condensed oligomeric and infinite-chain compounds. Zintl-phase concepts and the alkali-metal compounds that contain anionic 'naked' clusters or cluster networks of the triel elements Ga, In and T1 are also covered. The clusters include empty hypoelectronic examples as well as those that are centred by a heterometal or a triel element. The last compounds are remarkable parallels of the interstitial halides described.
C1 IOWA STATE UNIV SCI & TECHNOL, US DOE, AMES LAB, AMES, IA 50011 USA.
IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA.
NR 85
TC 80
Z9 80
U1 1
U2 6
PU ROYAL SOC CHEMISTRY
PI CAMBRIDGE
PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS,
ENGLAND
SN 1472-7773
J9 J CHEM SOC DALTON
JI J. Chem. Soc.-Dalton Trans.
PD MAR 7
PY 1996
IS 5
BP 575
EP 587
DI 10.1039/dt9960000575
PG 13
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA TZ019
UT WOS:A1996TZ01900004
ER
PT J
AU Fadley, CS
Len, PM
AF Fadley, CS
Len, PM
TI Atomic imaging - Holography with X-rays
SO NATURE
LA English
DT Editorial Material
ID ENERGY PHOTOELECTRON HOLOGRAPHY; ELECTRON-EMISSION HOLOGRAPHY
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720.
RP Fadley, CS (reprint author), UNIV CALIF DAVIS,DEPT PHYS,DAVIS,CA 95616, USA.
NR 16
TC 14
Z9 14
U1 1
U2 2
PU MACMILLAN MAGAZINES LTD
PI LONDON
PA 4 LITTLE ESSEX STREET, LONDON, ENGLAND WC2R 3LF
SN 0028-0836
J9 NATURE
JI Nature
PD MAR 7
PY 1996
VL 380
IS 6569
BP 27
EP 28
DI 10.1038/380027a0
PG 2
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA TY877
UT WOS:A1996TY87700035
ER
PT J
AU Kawasaki, M
Moroi, T
Yanagida, T
AF Kawasaki, M
Moroi, T
Yanagida, T
TI Constraint on the reheating temperature from the decay of the Polonyi
field
SO PHYSICS LETTERS B
LA English
DT Article
ID COSMOLOGICAL IMPLICATIONS; SUPERSTRING MODELS; SUPERGRAVITY; DILATION
AB We study the Polonyi problem in the framework of no-scale type supergravity models. We show that the lightest superparticle (LSP) produced in the decay of the Polonyi field may contribute too much to the present density of the universe. By requiring that LSP should not overdose the universe, we obtain a stringent constraint on the reheating temperature after the decay of the Polonyi field. We calculate the LSP density with physical parameters obtained by solving renormalization group equations in the minimal supersymmetric SU(5) model and find that the reheating temperature should be greater than about 100 MeV which corresponds to O(100) TeV of the Polonyi mass.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720.
UNIV TOKYO,DEPT PHYS,TOKYO 133,JAPAN.
UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106.
RP Kawasaki, M (reprint author), UNIV TOKYO,INST COSM RAY RES,TOKYO 188,JAPAN.
RI Yanagida, Tsutomu/A-4394-2011
NR 17
TC 67
Z9 67
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 7
PY 1996
VL 370
IS 1-2
BP 52
EP 58
DI 10.1016/0370-2693(95)01546-9
PG 7
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UA241
UT WOS:A1996UA24100010
ER
PT J
AU Feng, FL
Polonsky, N
Thomas, S
AF Feng, FL
Polonsky, N
Thomas, S
TI The light Higgsino-gaugino window
SO PHYSICS LETTERS B
LA English
DT Article
ID SUPERSYMMETRIC STANDARD MODEL; LOW-ENERGY SUPERGRAVITY; GLUINO WINDOW;
Z-DECAYS; NEUTRALINO; PARTICLES; VIOLATION; PHYSICS; LEP
AB Supersymmetric models are typically taken to have mu parameter and all soft supersymmetry breaking parameters at or near the weak scale. We point out that a small window of allowed values exists in which mu and the electroweak gaugino masses are in the few GeV range. Such models naturally solve the supersymmetry CP problem, can reduce the discrepancy in R(b). and suppress proton decay. In this window two neutralinos are in the few GeV range, two are roughly degenerate with the Z(0), and both charginos are roughly degenerate with the W-+/- bosons. Such a signature cannot escape detection at LEP II. Models that fall in this window automatically arise from renormalizable hidden sectors in which hidden sector singlets participate only radiatively in supersymmetry breaking.
C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720.
UNIV MUNICH,SEKT PHYS,LEHRSTUHL PROF WESS,D-80333 MUNICH,GERMANY.
STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309.
UNIV CALIF SANTA BARBARA,INST THEORET PHYS,SANTA BARBARA,CA 93106.
RP Feng, FL (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720, USA.
NR 70
TC 31
Z9 31
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 7
PY 1996
VL 370
IS 1-2
BP 95
EP 105
DI 10.1016/0370-2693(95)01544-2
PG 11
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UA241
UT WOS:A1996UA24100015
ER
PT J
AU Bagan, E
Lavelle, M
McMullan, D
AF Bagan, E
Lavelle, M
McMullan, D
TI The physical propagator of a slowly moving charge
SO PHYSICS LETTERS B
LA English
DT Article
ID QUANTUM ELECTRODYNAMICS; ASYMPTOTIC COMPLETENESS; SECTORS; STATES
AB We consider an electron which is electromagnetically dressed in such a way that it is both gauge invariant and that it has the associated electric and magnetic fields expected of a moving charge, We study the propagator of this dressed electron and, for small velocities, show explicitly at one loop that at the natural (on-shell) renormalisation point, p(0) = m,p = mv, one can renormalise the propagator multiplicatively. Furthermore the renormalisation constants are infra-red finite. This shows that the dressing we use corresponds to a slowly moving, physical asymptotic field.
C1 AUTONOMOUS UNIV BARCELONA,FIS TEOR GRP,E-08193 BARCELONA,SPAIN.
AUTONOMOUS UNIV BARCELONA,IFAE,E-08193 BARCELONA,SPAIN.
UNIV PLYMOUTH,SCH MATH & STAT,PLYMOUTH PL4 8AA,DEVON,ENGLAND.
RP Bagan, E (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,BLDG 510A,UPTON,NY 11973, USA.
NR 28
TC 7
Z9 7
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 7
PY 1996
VL 370
IS 1-2
BP 128
EP 134
DI 10.1016/0370-2693(96)00049-4
PG 7
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UA241
UT WOS:A1996UA24100020
ER
PT J
AU Acciarri, M
Adam, A
Adriani, O
AguilarBenitez, M
Ahlen, S
Alpat, B
Alcaraz, J
Allaby, J
Aloisio, A
Alverson, G
Alviggi, MG
Ambrosi, G
Anderhub, H
Andreev, VP
Angelescu, T
Antreasyan, D
Arefiev, A
Azemoon, T
Aziz, T
Bagnaia, P
Baksay, L
Ball, RC
Banerjee, S
Banicz, K
Barillere, R
Barone, L
Bartalini, P
Baschirotto, A
Basile, M
Battiston, R
Bay, A
Becattini, F
Becker, U
Behner, F
Bencze, GL
Berdugo, J
Berges, P
Bertucci, B
Betev, BL
Biasini, M
Biland, A
Bilei, GM
Blaising, JJ
Blyth, SC
Bobbink, GJ
Bock, R
Bohm, A
Borgia, B
Boucham, A
Bourilkov, D
Bourquin, M
Boutigny, D
Brambilla, E
Branson, JG
Brigljevic, V
Brock, IC
Buijs, A
Bujak, A
Burger, JD
Burger, JW
Burgos, C
Busenitz, J
Buytenhuijs, A
Cai, XD
Campanelli, M
Capell, M
Romero, GC
Caria, M
Carlino, G
Cartacci, AM
Casaus, J
Castellini, G
Castello, R
Cavallari, F
Cavallo, N
Cecchi, C
Cerrada, M
Cesaroni, F
Chamizo, M
Chan, A
Chang, YH
Chaturvedi, UK
Chemarin, M
Chen, A
Chen, C
Chen, G
Chen, GM
Chen, HF
Chen, HS
Cherau, X
Chiefari, G
Chien, CY
Choi, MT
Cifarelli, L
Cindolo, F
Civinini, C
Clare, I
Clare, R
Coan, TE
Cohn, HO
Coignet, G
Colijn, AP
Colino, N
Commichau, V
Costantini, S
Cotorobai, F
delaCruz, B
Dai, TS
DAlessandro, R
deAsmundis, R
DeBoeck, H
Degre, A
Deiters, K
Denes, E
Denes, P
DeNotaristefani, F
DiBitonto, D
Diemoz, M
vanDierendonck, D
DiLodovico, F
Dionisi, C
Dittmar, M
Dominguez, A
Doria, A
Dorne, I
Dova, MT
Drago, E
Duchesneau, D
Duinker, P
Duran, I
Dutta, S
Easo, S
Efremenko, Y
ElMamouni, H
Engler, A
Eppling, FJ
Erne, FC
Ernenwein, JP
Extermann, P
Fabbretti, R
Fabre, M
Faccini, R
Falciano, S
Favara, A
Fay, J
Felcini, M
Ferguson, T
Fernandez, D
Fernandez, G
Ferroni, F
Fesefeldt, H
Fiandrini, E
Field, JH
Filthaut, F
Fisher, PH
Forconi, G
Fredj, L
Freudenreich, K
Gailloud, M
Galaktionov, Y
Ganguli, SN
GarciaAbia, P
Gau, SS
Gentile, S
Gerald, J
Gheordanescu, N
Giagu, S
Goldfarb, S
Goldstein, J
Gong, ZF
Gonzalez, E
Gougas, A
Goujon, D
Gratta, C
Gruenewald, MW
Gupta, VK
Gurtu, A
Gustafson, HR
Gutay, LJ
Hangarter, K
Hartmann, B
Hasan, A
He, JT
Hebbeker, T
Herve, A
vanHoek, WC
Hofer, H
Hoorani, H
Hou, SR
Hu, G
Ilyas, MM
Innocente, V
Janssen, H
Jin, BN
Jones, LW
deJong, P
JosaMutuberria, I
Kasser, A
Khan, RA
Kamyshkov, Y
Kapinos, P
Kapustinsky, JS
Karyotakis, Y
Kaur, M
KienzleFocacci, MN
Kim, D
Kim, JK
Kim, SC
Kim, JG
Kinnison, WW
Kirkby, A
Kirkby, J
Kittel, W
Klimentov, A
Konig, AC
Koffeman, E
Kongeter, A
Koutsendo, V
Koulbardis, A
Kraemer, RW
Kramer, T
Krenz, W
Kuijten, H
Kunin, A
deGuevara, PL
Landi, G
Lapoint, C
LassilaPerini, K
Laurikainen, P
Lebeau, M
Lebedev, A
Lebrun, P
Lecomte, P
Lecoq, P
LeCoultre, P
Lee, J
Lee, KY
Leggett, C
LeGoff, JM
Leiste, R
Lenti, M
Leonardi, E
Levtchenko, P
Li, C
Lieb, E
Lin, WT
Linde, FL
Lindemann, B
Lista, L
Liu, ZA
Lohmann, W
Longo, E
Lu, W
Lu, YS
Lubelsmeyer, K
Luci, C
Luckey, D
Ludovici, L
Luminari, L
Lustermann, W
Ma, WG
Macchiolo, A
Maity, M
Majumder, G
Malgeri, L
Malinin, A
Mana, C
Mangla, S
Maolinbay, M
Marchesini, P
Marin, A
Martin, JP
Marzano, F
Massaro, GGG
Mazumdar, K
McNally, D
McNeil, RR
Mele, S
Merola, L
Meschini, M
Metzger, WJ
vonderMey, M
Mi, Y
Mihul, A
vanMil, AJW
Mirabelli, G
Mnich, J
Moller, M
Monteleoni, B
Moore, R
Morganti, S
Mount, R
Muller, S
Muheim, F
Nagy, E
Nahn, S
Napolitano, M
NessiTedaldi, F
Newman, H
AF Acciarri, M
Adam, A
Adriani, O
AguilarBenitez, M
Ahlen, S
Alpat, B
Alcaraz, J
Allaby, J
Aloisio, A
Alverson, G
Alviggi, MG
Ambrosi, G
Anderhub, H
Andreev, VP
Angelescu, T
Antreasyan, D
Arefiev, A
Azemoon, T
Aziz, T
Bagnaia, P
Baksay, L
Ball, RC
Banerjee, S
Banicz, K
Barillere, R
Barone, L
Bartalini, P
Baschirotto, A
Basile, M
Battiston, R
Bay, A
Becattini, F
Becker, U
Behner, F
Bencze, GL
Berdugo, J
Berges, P
Bertucci, B
Betev, BL
Biasini, M
Biland, A
Bilei, GM
Blaising, JJ
Blyth, SC
Bobbink, GJ
Bock, R
Bohm, A
Borgia, B
Boucham, A
Bourilkov, D
Bourquin, M
Boutigny, D
Brambilla, E
Branson, JG
Brigljevic, V
Brock, IC
Buijs, A
Bujak, A
Burger, JD
Burger, JW
Burgos, C
Busenitz, J
Buytenhuijs, A
Cai, XD
Campanelli, M
Capell, M
Romero, GC
Caria, M
Carlino, G
Cartacci, AM
Casaus, J
Castellini, G
Castello, R
Cavallari, F
Cavallo, N
Cecchi, C
Cerrada, M
Cesaroni, F
Chamizo, M
Chan, A
Chang, YH
Chaturvedi, UK
Chemarin, M
Chen, A
Chen, C
Chen, G
Chen, GM
Chen, HF
Chen, HS
Cherau, X
Chiefari, G
Chien, CY
Choi, MT
Cifarelli, L
Cindolo, F
Civinini, C
Clare, I
Clare, R
Coan, TE
Cohn, HO
Coignet, G
Colijn, AP
Colino, N
Commichau, V
Costantini, S
Cotorobai, F
delaCruz, B
Dai, TS
DAlessandro, R
deAsmundis, R
DeBoeck, H
Degre, A
Deiters, K
Denes, E
Denes, P
DeNotaristefani, F
DiBitonto, D
Diemoz, M
vanDierendonck, D
DiLodovico, F
Dionisi, C
Dittmar, M
Dominguez, A
Doria, A
Dorne, I
Dova, MT
Drago, E
Duchesneau, D
Duinker, P
Duran, I
Dutta, S
Easo, S
Efremenko, Y
ElMamouni, H
Engler, A
Eppling, FJ
Erne, FC
Ernenwein, JP
Extermann, P
Fabbretti, R
Fabre, M
Faccini, R
Falciano, S
Favara, A
Fay, J
Felcini, M
Ferguson, T
Fernandez, D
Fernandez, G
Ferroni, F
Fesefeldt, H
Fiandrini, E
Field, JH
Filthaut, F
Fisher, PH
Forconi, G
Fredj, L
Freudenreich, K
Gailloud, M
Galaktionov, Y
Ganguli, SN
GarciaAbia, P
Gau, SS
Gentile, S
Gerald, J
Gheordanescu, N
Giagu, S
Goldfarb, S
Goldstein, J
Gong, ZF
Gonzalez, E
Gougas, A
Goujon, D
Gratta, C
Gruenewald, MW
Gupta, VK
Gurtu, A
Gustafson, HR
Gutay, LJ
Hangarter, K
Hartmann, B
Hasan, A
He, JT
Hebbeker, T
Herve, A
vanHoek, WC
Hofer, H
Hoorani, H
Hou, SR
Hu, G
Ilyas, MM
Innocente, V
Janssen, H
Jin, BN
Jones, LW
deJong, P
JosaMutuberria, I
Kasser, A
Khan, RA
Kamyshkov, Y
Kapinos, P
Kapustinsky, JS
Karyotakis, Y
Kaur, M
KienzleFocacci, MN
Kim, D
Kim, JK
Kim, SC
Kim, JG
Kinnison, WW
Kirkby, A
Kirkby, J
Kittel, W
Klimentov, A
Konig, AC
Koffeman, E
Kongeter, A
Koutsendo, V
Koulbardis, A
Kraemer, RW
Kramer, T
Krenz, W
Kuijten, H
Kunin, A
deGuevara, PL
Landi, G
Lapoint, C
LassilaPerini, K
Laurikainen, P
Lebeau, M
Lebedev, A
Lebrun, P
Lecomte, P
Lecoq, P
LeCoultre, P
Lee, J
Lee, KY
Leggett, C
LeGoff, JM
Leiste, R
Lenti, M
Leonardi, E
Levtchenko, P
Li, C
Lieb, E
Lin, WT
Linde, FL
Lindemann, B
Lista, L
Liu, ZA
Lohmann, W
Longo, E
Lu, W
Lu, YS
Lubelsmeyer, K
Luci, C
Luckey, D
Ludovici, L
Luminari, L
Lustermann, W
Ma, WG
Macchiolo, A
Maity, M
Majumder, G
Malgeri, L
Malinin, A
Mana, C
Mangla, S
Maolinbay, M
Marchesini, P
Marin, A
Martin, JP
Marzano, F
Massaro, GGG
Mazumdar, K
McNally, D
McNeil, RR
Mele, S
Merola, L
Meschini, M
Metzger, WJ
vonderMey, M
Mi, Y
Mihul, A
vanMil, AJW
Mirabelli, G
Mnich, J
Moller, M
Monteleoni, B
Moore, R
Morganti, S
Mount, R
Muller, S
Muheim, F
Nagy, E
Nahn, S
Napolitano, M
NessiTedaldi, F
Newman, H
TI Measurement of hadron and lepton-pair production at 130 GeVGAMMA-GAMMA; NEUTRINOS; ELECTRONS; ENERGIES
AB We report on a search for the excited leptons e*, mu*, tau* and nu* in e(+)e(-) collisions at root s = 130-140 GeV using the L3 detector at LEP. No evidence has been found for their existence. From an analysis of the expected pair produced l*l* in the channels ee gamma gamma, mu mu gamma gamma, tau tau gamma gamma, eeWW, and nu nu gamma gamma, We determine the lower mass limits at 95% C.L. of 64.7 GeV for e*, 64.9 GeV for mu*, 64.2 GeV for tau*, 57.3 GeV (eW decay mode) and 61.4 GeV (nu gamma decay mode) for nu*. From an analysis of the expected singly produced ll* in the channels ee gamma, mu mu gamma, tau tau gamma, nu eW and nu nu gamma, we determine upper limits on the couplings lambda/m(l*) up to m(l*) = 130 GeV.
C1 RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY.
NATL INST NUCL & HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS.
UNIV AMSTERDAM, 1009 DB AMSTERDAM, NETHERLANDS.
UNIV MICHIGAN, ANN ARBOR, MI 48109 USA.
LAB ANNECY LE VIEUX PHYS PARTICULES, CNRS, IN2P3, F-74941 ANNECY LE VIEUX, FRANCE.
JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA.
UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND.
LOUISIANA STATE UNIV, BATON ROUGE, LA 70803 USA.
INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA.
INST HIGH ENERGY PHYS, D-10099 BERLIN, GERMANY.
IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY.
TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA.
BOSTON UNIV, BOSTON, MA 02215 USA.
NORTHEASTERN UNIV, BOSTON, MA 02115 USA.
INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA.
UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA.
HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY.
HARVARD UNIV, CAMBRIDGE, MA 02139 USA.
MIT, CAMBRIDGE, MA 02139 USA.
IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY.
UNIV FLORENCE, I-50125 FLORENCE, ITALY.
CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND.
WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND.
UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND.
UNIV SCI & TECHNOL CHINA, HEFEI 230029, ANHUI, PEOPLES R CHINA.
RES INST HIGH ENERGY PHYS, SF-00014 HELSINKI, FINLAND.
UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND.
IST NAZL FIS NUCL, I-73100 LECCE, ITALY.
UNIV LECCE, I-73100 LECCE, ITALY.
LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA.
UNIV LYON 1, CNRS, INST PHYS NUCL LYON, IN2P3, F-69622 VILLEURBANNE, FRANCE.
CIEMAT, E-28040 MADRID, SPAIN.
IST NAZL FIS NUCL, I-20133 MILAN, ITALY.
INST THEORET & EXPTL PHYS, MOSCOW 117259, RUSSIA.
IST NAZL FIS NUCL, I-80125 NAPLES, ITALY.
UNIV NAPLES, I-80125 NAPLES, ITALY.
UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS.
CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS.
NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS.
OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA.
CALTECH, PASADENA, CA 91125 USA.
IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY.
UNIV PERUGIA, I-06100 PERUGIA, ITALY.
CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA.
PRINCETON UNIV, PRINCETON, NJ 08544 USA.
IST NAZL FIS NUCL, I-00185 ROME, ITALY.
UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY.
INST PHYS NUCL, ST PETERSBURG, RUSSIA.
UNIV SALERNO, I-84100 SALERNO, ITALY.
IST NAZL FIS NUCL, I-84100 SALERNO, ITALY.
UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA.
UNIV SANTIAGO DE COMPOSTELA, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN.
BULGARIAN ACAD SCI, CENT LAB MECHATR & INSTRUMENT, BU-1113 SOFIA, BULGARIA.
KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA.
UNIV ALABAMA, TUSCALOOSA, AL 35486 USA.
UNIV UTRECHT, 3584 CB UTRECHT, NETHERLANDS.
NIKHEF, 3584 CB UTRECHT, NETHERLANDS.
PURDUE UNIV, W LAFAYETTE, IN 47907 USA.
PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND.
DESY, INST HOCHENERGIEPHYS, D-15738 ZEUTHEN, GERMANY.
ETH ZURICH, CH-8093 ZURICH, SWITZERLAND.
UNIV HAMBURG, D-22761 HAMBURG, GERMANY.
HIGH ENERGY PHYS GRP, TAIPEI, TAIWAN.
RP Acciarri, M (reprint author), RHEIN WESTFAL TH AACHEN, INST PHYS 1, D-52056 AACHEN, GERMANY.
RI Ferguson, Thomas/O-3444-2014; Berdugo, Javier/A-2858-2015; D'Alessandro,
Raffaello/F-5897-2015; Duran, Ignacio/H-7254-2015; rodriguez calonge,
francisco javier/H-9682-2015; Sanchez, Eusebio/H-5228-2015; Rancoita,
Pier Giorgio/J-9896-2015; Hoorani, Hafeez/D-1791-2013; Roth,
Stefan/J-2757-2016; Kamyshkov, Yuri/J-7999-2016; alpat, ali
behcet/G-6290-2013; bertucci, bruna/J-5237-2012; Cavallo,
Nicola/F-8913-2012; Cerrada, Marcos/J-6934-2014; de la Cruz,
Begona/K-7552-2014; Josa, Isabel/K-5184-2014; Gonzalez Romero,
Enrique/L-7561-2014; Fiandrini, Emanuele/C-4549-2008; Lista,
Luca/C-5719-2008; Ludovici, Lucio/F-5917-2011; Kirkby,
Jasper/A-4973-2012; Servoli, Leonello/E-6766-2012; Vogel,
Helmut/N-8882-2014
OI Ferguson, Thomas/0000-0001-5822-3731; Berdugo,
Javier/0000-0002-7911-8532; D'Alessandro, Raffaello/0000-0001-7997-0306;
Sanchez, Eusebio/0000-0002-9646-8198; Rancoita, Pier
Giorgio/0000-0002-1990-4283; Roth, Stefan/0000-0003-3616-2223;
Kamyshkov, Yuri/0000-0002-3789-7152; alpat, ali
behcet/0000-0002-0116-1506; Cerrada, Marcos/0000-0003-0112-1691;
Gonzalez Romero, Enrique/0000-0003-2376-8920; Ludovici,
Lucio/0000-0003-1970-9960; Kirkby, Jasper/0000-0003-2341-9069; Servoli,
Leonello/0000-0003-1725-9185; Vogel, Helmut/0000-0002-6109-3023
NR 38
TC 20
Z9 20
U1 1
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
EI 1873-2445
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 7
PY 1996
VL 370
IS 1-2
BP 211
EP 221
DI 10.1016/0370-2693(96)00045-7
PG 11
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UA241
UT WOS:A1996UA24100031
ER
PT J
AU Frabetti, PL
Cheung, HWK
Cumalat, JP
Dallapiccola, C
Ginkel, JF
Johns, WE
Nehring, MS
Butler, JN
Cihangir, S
Gaines, I
Garbincius, PH
Garren, L
Gourlay, SA
Harding, DJ
Kasper, P
Kreymer, A
Lebrun, P
Shukla, S
Vittone, M
Bianco, S
Fabbri, FL
Sarwar, S
Zallo, A
Culbertson, R
Gardner, RW
Greene, R
Wiss, J
Alimonti, G
Bellini, G
Boschini, M
Brambilla, D
Caccianiga, B
Cinquini, L
DiCorato, M
Giammarchi, M
Inzani, P
Leveraro, F
Malvezzi, S
Menasce, D
Meroni, E
Moroni, L
Pedrini, D
Perasso, L
Prelz, F
Sala, A
Sala, S
Torretta, D
Buchholz, D
Claes, D
Gobbi, B
OReilly, B
Bishop, JM
Cason, NM
Kennedy, CJ
Kim, GN
Lin, TF
Puseljic, DL
Ruchti, RC
Shephard, WD
Swiatek, JA
Wu, ZY
Arena, V
Boca, G
Castoldi, C
Gianini, G
Ratti, SP
Riccardi, C
Viola, L
Vitulo, P
Lopez, A
Grim, GP
Paolone, VS
Yager, PM
Wilson, JR
Sheldon, PD
Davenport, F
Blackett, GR
Danyo, K
Pisharody, M
Handler, T
Cheon, BG
Kang, JS
Kim, KY
AF Frabetti, PL
Cheung, HWK
Cumalat, JP
Dallapiccola, C
Ginkel, JF
Johns, WE
Nehring, MS
Butler, JN
Cihangir, S
Gaines, I
Garbincius, PH
Garren, L
Gourlay, SA
Harding, DJ
Kasper, P
Kreymer, A
Lebrun, P
Shukla, S
Vittone, M
Bianco, S
Fabbri, FL
Sarwar, S
Zallo, A
Culbertson, R
Gardner, RW
Greene, R
Wiss, J
Alimonti, G
Bellini, G
Boschini, M
Brambilla, D
Caccianiga, B
Cinquini, L
DiCorato, M
Giammarchi, M
Inzani, P
Leveraro, F
Malvezzi, S
Menasce, D
Meroni, E
Moroni, L
Pedrini, D
Perasso, L
Prelz, F
Sala, A
Sala, S
Torretta, D
Buchholz, D
Claes, D
Gobbi, B
OReilly, B
Bishop, JM
Cason, NM
Kennedy, CJ
Kim, GN
Lin, TF
Puseljic, DL
Ruchti, RC
Shephard, WD
Swiatek, JA
Wu, ZY
Arena, V
Boca, G
Castoldi, C
Gianini, G
Ratti, SP
Riccardi, C
Viola, L
Vitulo, P
Lopez, A
Grim, GP
Paolone, VS
Yager, PM
Wilson, JR
Sheldon, PD
Davenport, F
Blackett, GR
Danyo, K
Pisharody, M
Handler, T
Cheon, BG
Kang, JS
Kim, KY
TI Charm-anticharm asymmetries in high energy photoproduction
SO PHYSICS LETTERS B
LA English
DT Article
ID LUND MONTE-CARLO; JET FRAGMENTATION; E+E-PHYSICS; MECHANISMS
AB We report measurements of charm particle production asymmetries from the Fermilab photoproduction experiment E687. An asymmetry in the rate of production of charm versus anticharm particles is expected to arise primarily from fragmentation effects. We observe statistically significant asymmetries in the photoproduction of D+, D-*+ and D-0 mesons and find small (but statistically weak) asymmetries in the production of the D-s(+) meson and the Lambda(c)(+) baryon. Our inclusive photoproduction asymmetries are compared to predictions from nonperturbative models of charm quark fragmentation.
C1 IST NAZL FIS NUCL,I-40126 BOLOGNA,ITALY.
UNIV COLORADO,BOULDER,CO 80309.
FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510.
IST NAZL FIS NUCL,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY.
UNIV ILLINOIS,URBANA,IL 61801.
UNIV MILAN,DEPT FIS,I-20133 MILAN,ITALY.
IST NAZL FIS NUCL,I-20133 MILAN,ITALY.
NORTHWESTERN UNIV,EVANSTON,IL 60208.
UNIV NOTRE DAME,NOTRE DAME,IN 46556.
UNIV PAVIA,DIPARTIMENTO FIS NUCL & TEOR,I-27100 PAVIA,ITALY.
IST NAZL FIS NUCL,I-27100 PAVIA,ITALY.
UNIV PUERTO RICO,MAYAGUEZ,PR 00709.
UNIV CALIF DAVIS,DAVIS,CA 95616.
UNIV S CAROLINA,COLUMBIA,SC 29208.
VANDERBILT UNIV,NASHVILLE,TN 37235.
UNIV N CAROLINA,ASHEVILLE,NC 28804.
UNIV TENNESSEE,KNOXVILLE,TN 37996.
KOREA UNIV,SEOUL 136701,SOUTH KOREA.
RP Frabetti, PL (reprint author), UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY.
RI Menasce, Dario Livio/A-2168-2016; Gianini, Gabriele/M-5195-2014;
OI Menasce, Dario Livio/0000-0002-9918-1686; Gianini,
Gabriele/0000-0001-5186-0199; bianco, stefano/0000-0002-8300-4124
NR 16
TC 30
Z9 31
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 7
PY 1996
VL 370
IS 1-2
BP 222
EP 232
DI 10.1016/0370-2693(96)00085-8
PG 11
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UA241
UT WOS:A1996UA24100032
ER
PT J
AU Abachi, S
Abbott, B
Abolins, M
Acharya, BS
Adam, I
Adams, DL
Adams, M
Ahn, S
Aihara, H
Alitti, J
Alvarez, G
Alves, GA
Amidi, E
Amos, N
Anderson, EW
Aronson, SH
Astur, R
Avery, RE
Baden, A
Balamurali, V
Balderston, J
Baldin, B
Bantly, J
Bartlett, JF
Bazizi, K
Bendich, J
Beri, SB
Bertram, I
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Bhattacharjee, M
Bischoff, A
Biswas, N
Blazey, G
Blessing, S
Bloom, P
Boehnlein, A
Bojko, NI
Borcherding, F
Borders, J
Boswell, C
Brandt, A
Brock, R
Bross, A
Buchholz, D
Burtovoi, VS
Butler, JM
Carvalho, W
Casey, D
CastillaValdez, H
Chakraborty, D
Chang, SM
Chekulaev, SV
Chen, LP
Chen, W
Chopra, S
Choudhary, BC
Christenson, JH
Chung, M
Cobau, WG
Cochran, J
Cooper, WE
Cretsinger, C
Claes, D
Clark, AR
CullenVidal, D
Cummings, MAC
Cutts, D
Dahl, OI
De, K
Demarteau, M
Demina, R
Denisenko, K
Denisenko, N
Denisov, D
Denisov, SP
Diehl, HT
Diesburg, M
DiLoreto, G
Dixon, R
Draper, P
Drinkard, J
Ducros, Y
Dugad, SR
DurstonJohnson, S
Edmunds, D
Ellison, J
Elvira, VD
Engelmann, R
Eno, S
Eppley, G
Ermolov, P
Eroshin, OV
Evdokimov, VN
Fahey, S
Fahland, T
Fatyga, M
Fatyga, MK
Featherly, J
Feher, S
Fein, D
Ferbel, T
Finocchiaro, G
Fisk, HE
Fisyak, Y
Flattum, E
Forden, GE
Fortner, M
Frame, KC
Franzini, P
Fuess, S
Gallas, E
Galyaev, AN
Geld, T
Genik, RJ
Genser, K
Gerber, CE
Gibbard, B
Glebov, V
Glenn, S
Glicenstein, JF
Gobbi, B
Goforth, M
Goldschmidt, A
Gomez, B
Goncharov, PI
Gonzalez, JL
Gordon, H
Goss, LT
Graf, N
Grannis, PD
Green, DR
Green, J
Greenlee, H
Griffin, G
Grossman, N
Grundberg, P
Grunendahl, S
Gu, WX
Guglielmo, G
Guida, JA
Guida, JM
Guryn, W
Gurzhiev, SN
Gutierrez, P
Gutnikov, YE
Hadley, NJ
Haggerty, H
Hagopian, S
Hagopian, V
Hahn, KS
Hall, RE
Hansen, S
Hatcher, R
Hauptman, JM
Hedin, D
Heinson, AP
Heintz, U
HernandezMontoya, R
Heuring, T
Hirosky, R
Hobbs, JD
Hoeneisen, B
Hoftun, JS
Hsieh, F
Hu, T
Hu, T
Hu, T
Huehn, T
Igarashi, S
Ito, AS
James, E
Jaques, J
Jerger, SA
Jiang, JZY
JoffeMinor, T
Johari, H
Johns, K
Johnson, M
Johnstad, H
Jonckheere, A
Jones, M
Jostlein, H
Jun, SY
Jung, CK
Kahn, S
Kalbfleisch, G
Kang, JS
Kehoe, R
Kelly, ML
Kerth, L
Kim, CL
Kim, SK
Klatchko, A
Klima, B
Klochkov, BI
Klopfenstein, C
Klyukhin, VI
Kochetkov, VI
Kohli, JM
Koltick, D
Kostritskiy, AV
Kotcher, J
Kourlas, J
Kozelov, AV
Kozlovski, EA
Krishnaswamy, MR
Krzywdzinski, S
Kunori, S
Lami, S
Landsberg, G
Lebrat, JF
Leflat, A
Li, H
Li, J
Li, YK
LiDemarteau, QZ
Lima, JGR
Lincoln, D
Linn, SL
Linnemann, J
Lipton, R
Liu, YC
Lobkowicz, F
Loken, SC
Lokos, S
Lueking, L
Lyon, AL
Maciel, AKA
Madaras, RJ
Madden, R
Mani, S
Mao, HS
Margulies, S
Markeloff, R
Markosky, L
Marshall, T
Martin, MI
Marx, M
May, B
Mayorov, AA
McCarthy, R
McKibben, T
McKinley, J
McMahon, T
Melanson, HL
Neto, JRTD
Merritt, KW
Miettinen, H
Mincer, A
deMiranda, JM
Mishra, CS
MohammadiBaarmand, M
Mokhov, N
Mondal, NK
Montgomery, HE
Mooney, P
daMotta, H
Mudan, M
Murphy, C
Negret, JP
Neis, E
Nemethy, P
Nesic, D
Nicola, M
Norman, D
Oesch, L
Oguri, V
Oltman, E
Oshima, N
Owen, D
Padley, P
Pang, M
Para, A
Park, CH
Park, YM
Partridge, R
Parua, N
Paterno, M
Perkins, J
Peryshkin, A
Peters, M
Piekarz, H
Pischalnikov, Y
Podstavkov, VM
Pope, BG
Prosper, HB
Protopopescu, S
Puseljic, D
Qian, J
Quintas, PZ
Raja, R
Rajagopalan, S
Ramirez, O
Rao, MVS
Rapidis, PA
Rasmussen, L
Read, AL
Reucroft, S
AF Abachi, S
Abbott, B
Abolins, M
Acharya, BS
Adam, I
Adams, DL
Adams, M
Ahn, S
Aihara, H
Alitti, J
Alvarez, G
Alves, GA
Amidi, E
Amos, N
Anderson, EW
Aronson, SH
Astur, R
Avery, RE
Baden, A
Balamurali, V
Balderston, J
Baldin, B
Bantly, J
Bartlett, JF
Bazizi, K
Bendich, J
Beri, SB
Bertram, I
Bezzubov, VA
Bhat, PC
Bhatnagar, V
Bhattacharjee, M
Bischoff, A
Biswas, N
Blazey, G
Blessing, S
Bloom, P
Boehnlein, A
Bojko, NI
Borcherding, F
Borders, J
Boswell, C
Brandt, A
Brock, R
Bross, A
Buchholz, D
Burtovoi, VS
Butler, JM
Carvalho, W
Casey, D
CastillaValdez, H
Chakraborty, D
Chang, SM
Chekulaev, SV
Chen, LP
Chen, W
Chopra, S
Choudhary, BC
Christenson, JH
Chung, M
Cobau, WG
Cochran, J
Cooper, WE
Cretsinger, C
Claes, D
Clark, AR
CullenVidal, D
Cummings, MAC
Cutts, D
Dahl, OI
De, K
Demarteau, M
Demina, R
Denisenko, K
Denisenko, N
Denisov, D
Denisov, SP
Diehl, HT
Diesburg, M
DiLoreto, G
Dixon, R
Draper, P
Drinkard, J
Ducros, Y
Dugad, SR
DurstonJohnson, S
Edmunds, D
Ellison, J
Elvira, VD
Engelmann, R
Eno, S
Eppley, G
Ermolov, P
Eroshin, OV
Evdokimov, VN
Fahey, S
Fahland, T
Fatyga, M
Fatyga, MK
Featherly, J
Feher, S
Fein, D
Ferbel, T
Finocchiaro, G
Fisk, HE
Fisyak, Y
Flattum, E
Forden, GE
Fortner, M
Frame, KC
Franzini, P
Fuess, S
Gallas, E
Galyaev, AN
Geld, T
Genik, RJ
Genser, K
Gerber, CE
Gibbard, B
Glebov, V
Glenn, S
Glicenstein, JF
Gobbi, B
Goforth, M
Goldschmidt, A
Gomez, B
Goncharov, PI
Gonzalez, JL
Gordon, H
Goss, LT
Graf, N
Grannis, PD
Green, DR
Green, J
Greenlee, H
Griffin, G
Grossman, N
Grundberg, P
Grunendahl, S
Gu, WX
Guglielmo, G
Guida, JA
Guida, JM
Guryn, W
Gurzhiev, SN
Gutierrez, P
Gutnikov, YE
Hadley, NJ
Haggerty, H
Hagopian, S
Hagopian, V
Hahn, KS
Hall, RE
Hansen, S
Hatcher, R
Hauptman, JM
Hedin, D
Heinson, AP
Heintz, U
HernandezMontoya, R
Heuring, T
Hirosky, R
Hobbs, JD
Hoeneisen, B
Hoftun, JS
Hsieh, F
Hu, T
Hu, T
Hu, T
Huehn, T
Igarashi, S
Ito, AS
James, E
Jaques, J
Jerger, SA
Jiang, JZY
JoffeMinor, T
Johari, H
Johns, K
Johnson, M
Johnstad, H
Jonckheere, A
Jones, M
Jostlein, H
Jun, SY
Jung, CK
Kahn, S
Kalbfleisch, G
Kang, JS
Kehoe, R
Kelly, ML
Kerth, L
Kim, CL
Kim, SK
Klatchko, A
Klima, B
Klochkov, BI
Klopfenstein, C
Klyukhin, VI
Kochetkov, VI
Kohli, JM
Koltick, D
Kostritskiy, AV
Kotcher, J
Kourlas, J
Kozelov, AV
Kozlovski, EA
Krishnaswamy, MR
Krzywdzinski, S
Kunori, S
Lami, S
Landsberg, G
Lebrat, JF
Leflat, A
Li, H
Li, J
Li, YK
LiDemarteau, QZ
Lima, JGR
Lincoln, D
Linn, SL
Linnemann, J
Lipton, R
Liu, YC
Lobkowicz, F
Loken, SC
Lokos, S
Lueking, L
Lyon, AL
Maciel, AKA
Madaras, RJ
Madden, R
Mani, S
Mao, HS
Margulies, S
Markeloff, R
Markosky, L
Marshall, T
Martin, MI
Marx, M
May, B
Mayorov, AA
McCarthy, R
McKibben, T
McKinley, J
McMahon, T
Melanson, HL
Neto, JRTD
Merritt, KW
Miettinen, H
Mincer, A
deMiranda, JM
Mishra, CS
MohammadiBaarmand, M
Mokhov, N
Mondal, NK
Montgomery, HE
Mooney, P
daMotta, H
Mudan, M
Murphy, C
Negret, JP
Neis, E
Nemethy, P
Nesic, D
Nicola, M
Norman, D
Oesch, L
Oguri, V
Oltman, E
Oshima, N
Owen, D
Padley, P
Pang, M
Para, A
Park, CH
Park, YM
Partridge, R
Parua, N
Paterno, M
Perkins, J
Peryshkin, A
Peters, M
Piekarz, H
Pischalnikov, Y
Podstavkov, VM
Pope, BG
Prosper, HB
Protopopescu, S
Puseljic, D
Qian, J
Quintas, PZ
Raja, R
Rajagopalan, S
Ramirez, O
Rao, MVS
Rapidis, PA
Rasmussen, L
Read, AL
Reucroft, S
TI J/Psi production in p(p)over-bar collisions at root s=1.8 TeV
SO PHYSICS LETTERS B
LA English
DT Article
DE beauty; Charmonium; QCD; tevatron
ID = 1.8 TEV; B-QUARK PRODUCTION; (P)OVER-BAR-P COLLISIONS;
HADRON-COLLISIONS; COLLIDER; TRIGGER
AB We have studied J/psi production in p (p) over bar collisions at root s = 1.8 TeV with the DO detector at Fermilab using mu(+)mu(-) data. We have measured the inclusive J/psi production cross section as a function of J/psi transverse momentum, p(T). For the kinematic range p(T) > 8 GeV/c and \eta\ < 0.6 we obtain sigma(p (p) over bar --> J/psi + X) . Br(J/psi --> mu(+)mu(-)) = 2.08 +/- 0.17(stat) +/- 0.46(syst) nb. Using the muon impact parameter we have estimated the fraction of J/psi mesons coming from B meson decays to be f(b) = 0.35 +/- 0.09(stat) +/- 0.10(syst) and inferred the inclusive b production cross section. From the information on the event topology the fraction of nonisolated J/psi events has been measured to be f(nonisol) = 0.64 +/- 0.08(stat) +/- 0.06(syst). We have also obtained the fraction of J/psi events resulting from radiative decays of chi(c) states, f(chi) = 0.32 +/- 0.07(stat) +/- 0.07(syst). We discuss the implications of our measurements for charmonium production processes.
C1 UNIV ARIZONA,TUCSON,AZ 85721.
BOSTON UNIV,BOSTON,MA 02215.
BROOKHAVEN NATL LAB,UPTON,NY 11973.
BROWN UNIV,PROVIDENCE,RI 02912.
UNIV BUENOS AIRES,BUENOS AIRES,DF,ARGENTINA.
UNIV CALIF DAVIS,DAVIS,CA 95616.
UNIV CALIF IRVINE,IRVINE,CA 92717.
UNIV CALIF RIVERSIDE,RIVERSIDE,CA 92521.
CTR BRASILEIRO PESQUISAS FIS,LAFEX,RIO JANEIRO,BRAZIL.
CTR INVEST & ESTUDIOS AVANZADOS,MEXICO CITY,DF,MEXICO.
COLUMBIA UNIV,NEW YORK,NY 10027.
UNIV DELHI,DELHI 110007,INDIA.
FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510.
FLORIDA STATE UNIV,TALLAHASSEE,FL 32306.
UNIV HAWAII,HONOLULU,HI 96822.
UNIV ILLINOIS,CHICAGO,IL 60607.
INDIANA UNIV,BLOOMINGTON,IN 47405.
IOWA STATE UNIV SCI & TECHNOL,AMES,IA 50011.
KOREA UNIV,SEOUL 136701,SOUTH KOREA.
KYUNGSUNG UNIV,PUSAN,SOUTH KOREA.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
UNIV MARYLAND,COLLEGE PK,MD 20742.
UNIV MICHIGAN,ANN ARBOR,MI 48109.
MICHIGAN STATE UNIV,E LANSING,MI 48824.
MOSCOW MV LOMONOSOV STATE UNIV,MOSCOW,RUSSIA.
UNIV NEBRASKA,LINCOLN,NE 68588.
NYU,NEW YORK,NY 10003.
NORTHEASTERN UNIV,BOSTON,MA 02115.
NO ILLINOIS UNIV,DE KALB,IL 60115.
NORTHWESTERN UNIV,EVANSTON,IL 60208.
UNIV NOTRE DAME,NOTRE DAME,IN 46556.
UNIV OKLAHOMA,NORMAN,OK 73019.
PUNJABI UNIV,CHANDIGARH 160014,INDIA.
INST HIGH ENERGY PHYS,PROTVINO 142284,RUSSIA.
PURDUE UNIV,W LAFAYETTE,IN 47907.
RICE UNIV,HOUSTON,TX 77251.
UNIV ESTADUAL RIO DE JANEIRO,RIO JANEIRO,BRAZIL.
UNIV ROCHESTER,ROCHESTER,NY 14627.
CEA SACLAY,DAPNIA,SERV PHYS PARTICULES,GIF SUR YVETTE,FRANCE.
SEOUL NATL UNIV,SEOUL,SOUTH KOREA.
SUNY STONY BROOK,STONY BROOK,NY 11794.
SSC LAB,DALLAS,TX 75237.
TATA INST FUNDAMENTAL RES,BOMBAY 400005,MAHARASHTRA,INDIA.
UNIV TEXAS,ARLINGTON,TX 76019.
TEXAS A&M UNIV,COLLEGE STN,TX 77843.
RP Abachi, S (reprint author), UNIV LOS ANDES,BOGOTA,COLOMBIA.
RI Alves, Gilvan/C-4007-2013; Kim, Sun Kee/G-2042-2015; Chekulaev,
Sergey/O-1145-2015; de Mello Neto, Joao/C-5822-2013; Sznajder,
Andre/L-1621-2016; Aihara, Hiroaki/F-3854-2010; Gutierrez,
Phillip/C-1161-2011; Leflat, Alexander/D-7284-2012; Klyukhin,
Vyacheslav/D-6850-2012; De, Kaushik/N-1953-2013; Oguri,
Vitor/B-5403-2013
OI Kim, Sun Kee/0000-0002-0013-0775; de Mello Neto,
Joao/0000-0002-3234-6634; Sznajder, Andre/0000-0001-6998-1108; Aihara,
Hiroaki/0000-0002-1907-5964; Klyukhin, Vyacheslav/0000-0002-8577-6531;
De, Kaushik/0000-0002-5647-4489;
NR 28
TC 110
Z9 110
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0370-2693
J9 PHYS LETT B
JI Phys. Lett. B
PD MAR 7
PY 1996
VL 370
IS 1-2
BP 239
EP 248
DI 10.1016/0370-2693(96)00067-6
PG 10
WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA UA241
UT WOS:A1996UA24100034
ER
PT J
AU Peachey, NM
Snow, RC
Dye, RC
AF Peachey, NM
Snow, RC
Dye, RC
TI Composite Pd/Ta metal membranes for hydrogen separation
SO JOURNAL OF MEMBRANE SCIENCE
LA English
DT Article
DE composite membranes; gas separations; membrane preparation and
structure; metal membranes
ID PALLADIUM
AB The fabrication of a composite metal membrane using Vapor deposition techniques is reported. Commercially obtained tantalum foils are cleaned by ion milling and subsequently coated with palladium metal. The test foil was 13 mu m tantalum sheet coated with 1 mu m of palladium on each side. For comparison, several other foils of differing tantalum and palladium thicknesses were investigated, These membranes having an area of about 2 cm(2) provide a hydrogen flux ranging from 18.7 standard cubic centimeters per minute (seem) at 300 degrees C to 27.4 seem at 365 degrees C with a hydrogen differential pressure of about 355 torr. The deposited palladium films were oriented along the (111) crystal axis. Gas flux versus pressure measurements revealed that these membranes do not show the p(0.5) dependence upon applied differential pressure expected for foils in which bulk diffusion is rate limiting. This indicates that surface effects are becoming significant in determining hydrogen flux.
C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
NR 23
TC 88
Z9 88
U1 2
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0376-7388
J9 J MEMBRANE SCI
JI J. Membr. Sci.
PD MAR 6
PY 1996
VL 111
IS 1
BP 123
EP 133
DI 10.1016/0376-7388(95)00298-7
PG 11
WC Engineering, Chemical; Polymer Science
SC Engineering; Polymer Science
GA UA232
UT WOS:A1996UA23200013
ER
PT J
AU Buchanan, AC
Britt, PF
Thomas, KB
Biggs, CA
AF Buchanan, AC
Britt, PF
Thomas, KB
Biggs, CA
TI Evidence for a radical relay mechanism during reaction of
surface-immobilized molecules
SO JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
LA English
DT Article
ID CHAIN DECOMPOSITION; HYDROGEN-TRANSFER; MODEL COMPOUNDS; RATE CONSTANTS;
COAL; THERMOLYSIS; 1,3-DIPHENYLPROPANE; 1,4-DIPHENYLBUTANE; CHEMISTRY;
PYROLYSIS
AB The impact of restricted mass transport on high-temperature, free-radical reactions has been explored through the use of organic compounds immobilized on silica surfaces by a thermally robust Si-O-C-aromatic linkage. The rate of thermolysis of surface-immobilized 1,3-diphenylpropane (approximate to DPP) at 375 degrees C under vacuum, by a free-radical chain pathway, was found to be very sensitive (factor of 40 variation) to the structure and orientation of a second, neighboring spacer molecule on the surface. Compared with the inert aromatic spacers, (e.g. biphenyl) it was found that spacer molecules containing reactive benzylic C-H bonds (e.g. diphenylmethane) are capable of accelerating the approximate to DPP thermolysis by a process that is unique to diffusionally constrained systems. A mechanism involving rapid serial hydrogen transfer steps on the surface is proposed, which results in radical intermediates being relayed across the surface and, hence, overcoming classical diffusional limitations.
RP Buchanan, AC (reprint author), OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,POB 2008,OAK RIDGE,TN 37831, USA.
NR 45
TC 25
Z9 25
U1 0
U2 5
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0002-7863
J9 J AM CHEM SOC
JI J. Am. Chem. Soc.
PD MAR 6
PY 1996
VL 118
IS 9
BP 2182
EP 2189
DI 10.1021/ja953548s
PG 8
WC Chemistry, Multidisciplinary
SC Chemistry
GA TY698
UT WOS:A1996TY69800008
ER
PT J
AU Bar, G
Rubin, S
Cutts, RW
Taylor, TN
Zawodzinski, TA
AF Bar, G
Rubin, S
Cutts, RW
Taylor, TN
Zawodzinski, TA
TI Dendrimer-modified silicon oxide surfaces as platforms for the
deposition of gold and silver colloid monolayers: Preparation method,
characterization, and correlation between microstructure and optical
properties
SO LANGMUIR
LA English
DT Article
ID ATOMIC-FORCE MICROSCOPY; LANGMUIR-BLODGETT-FILMS; 2ND-HARMONIC
GENERATION; HYDROGEN EVOLUTION; METAL PARTICLES; ENHANCED RAMAN; TIP
ARTIFACTS; CATALYSTS; SIZE; PALLADIUM
AB We describe a novel approach for Au and Ag colloid monolayer formation on different silicon oxide surfaces such as glass, silicon, and ITO. The preparation method is simple and yields monolayers with easily controlled spacing within the monolayer without aggregation of metal particles. The colloid monolayers are prepared in two steps: (1) modification of the substrates with starburst dendrimers and (2) noble metal colloid deposition onto the dendrimer layer. Different Au and Ag colloids, ranging from 15 to 80 nm in particle diameter, have been deposited onto the dendrimer-modified surfaces. The structure and properties of the resulting particle arrays have been studied by atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, and surface-enhanced Raman scattering(SERS). XPS data show that the dendrimers spontaneously adsorb to various silicon oxide surfaces. The thickness of the dendrimer overlayer has been calculated and lies in the d = 14-25 Angstrom range. SEM and AFM data show that the colloids spontaneously form continuous films on the dendrimer-modified surfaces. The noble metal particles are well isolated and confined to a single layer, and aggregation does not occur on the surface. The interparticle spacing (74-829 nm) and surface coverage can be controlled over a wide range by colloid size, colloid concentration, and immersion time. UV-vis spectroscopic data show that the microstructure directly controls the optical properties of the layer. Finally, we demonstrate that the prepared substrates provide a useful platform for SERS studies of materials adsorbed on the metal particles.
C1 LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA.
RP Bar, G (reprint author), UNIV FREIBURG, FREIBURGER MAT FORSCHUNGSZENTRUM, STEFAN MEIER STR 21, D-79104 FREIBURG, GERMANY.
NR 60
TC 124
Z9 126
U1 2
U2 33
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD MAR 6
PY 1996
VL 12
IS 5
BP 1172
EP 1179
DI 10.1021/la950662f
PG 8
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA TZ050
UT WOS:A1996TZ05000011
ER
PT J
AU Nomikou, Z
VanHove, MA
Somorjai, GA
AF Nomikou, Z
VanHove, MA
Somorjai, GA
TI Molecular modeling of ethylidyne adsorption and diffusion on Pt(111)
SO LANGMUIR
LA English
DT Article
ID ORBITAL METHOD; BAND-STRUCTURE; ETHYLENE; HYDROGENATION; SURFACES;
GEOMETRIES; FRAGMENTS; PLATINUM
AB The adsorption geometry and diffusion behavior of ethylidyne (CCH3) on Pt(111) is studied in order to help elucidate the role of this hydrocarbon species during ethylene hydrogenation and dehydrogenation over Pt catalysts. A variant of the extended Huckel method is used, which allows bond-specific parametrization in molecules. It is adapted to geometrically infinite periodic systems, and empirical parameter values suitable for hydrocarbons on Pt surfaces are developed. The 3-fold fee and hcp hollows are found to be the most stable adsorption sites, with an energy barrier of about 0.11 eV between them. This barrier suggests relatively easy diffusion of ethylidyne along the Pt(111) surface (subject only to steric intermolecular constraints), allowing unimpeded ethylene approach by opening up sites where subsequent hydrogenation reactions could take place with preadsorbed hydrogen.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720.
RI Van Hove, Michel/A-9862-2008
OI Van Hove, Michel/0000-0002-8898-6921
NR 30
TC 26
Z9 26
U1 0
U2 3
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0743-7463
J9 LANGMUIR
JI Langmuir
PD MAR 6
PY 1996
VL 12
IS 5
BP 1251
EP 1256
DI 10.1021/la9503921
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science,
Multidisciplinary
SC Chemistry; Materials Science
GA TZ050
UT WOS:A1996TZ05000023
ER
PT J
AU Jaishree, TN
Ramakrishnan, V
White, SW
AF Jaishree, TN
Ramakrishnan, V
White, SW
TI Solution structure of prokaryotic ribosomal protein S17 by
high-resolution NMR spectroscopy
SO BIOCHEMISTRY
LA English
DT Article
ID PULSED-FIELD GRADIENTS; RNA-BINDING DOMAIN; ESCHERICHIA-COLI;
3-DIMENSIONAL STRUCTURE; CRYSTAL-STRUCTURE; LARGER PROTEINS; SPECTRA;
RELAXATION; SUBUNITS; SENSITIVITY
AB The solution structure of a primary 16S rRNA-binding ribosomal protein, S17, was investigated by two- and three-dimensional homonuclear and heteronuclear magnetic resonance spectroscopy. Almost complete chemical shift assignments for the H-1, N-15, and C-13 resonances have been obtained. The NMR data have been rigorously analyzed using a combination of distance geometry, back-calculation, and simulated annealing refinement techniques, and a high-resolution three-dimensional structure has been deduced. The protein consists of a single twisted antiparallel beta-pleated sheet with Greek-key topology. The five beta-strands are connected by extended loops that are flexible compared to the beta-sheet core structure and appear not to adopt one definite conformation in solution. Two of these loops contain many of the residues that have been implicated in binding ribosomal RNA. The location and distribution of these residues and other positively charged side chains on the protein surface suggest an interaction with two distinct regions of ribosomal RNA.
C1 DUKE UNIV,MED CTR,DEPT MICROBIOL,DURHAM,NC 27710.
BROOKHAVEN NATL LAB,DEPT BIOL,UPTON,NY 11973.
OI Ramakrishnan, V/0000-0002-4699-2194
FU NIGMS NIH HHS [GM44973]
NR 80
TC 40
Z9 42
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD MAR 5
PY 1996
VL 35
IS 9
BP 2845
EP 2853
DI 10.1021/bi951062i
PG 9
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA TZ118
UT WOS:A1996TZ11800006
PM 8608120
ER
PT J
AU Brubaker, MJ
Dyer, DH
Stoddard, B
Koshland, DE
AF Brubaker, MJ
Dyer, DH
Stoddard, B
Koshland, DE
TI Synthesis, kinetics, and structural studies of a photolabile caged
isocitrate: A catalytic trigger for isocitrate dehydrogenase
SO BIOCHEMISTRY
LA English
DT Article
ID RESOLVED MACROMOLECULAR CRYSTALLOGRAPHY; NICOTINAMIDE
ADENINE-DINUCLEOTIDE; FLASH-PHOTOLYSIS; ACTIVE-SITE; PHOSPHORYLATION;
MECHANISM; ENZYME; DIFFRACTION; RESOLUTION; PHOSPHATE
AB A biologically inactive photolabile derivative of isocitrate has been synthesized and characterized. The caged isocitrate is photolyzed to isocitrate with a rate constant of 234 s(-1), a half-lift of 3 Ins, and a quantum yield of 0.3 at pH = 6.4, Caged isocitrate (1-(2-nitrophenyl)ethyl 1-hydroxy-1,2-dicarboxy-3-propanecarboxylate) was synthesized in a straightforward synthetic manner stal ting with racemic isocitric acid lactone, Laser pulse photolysis at a wavelength of 355 nm was used to determine the rate of photolysis and the quantum yield and to quantify the :amount of energy needed fur quantitative conversion of the caged isocitrate to free isocitrate, Enzymatic conversion of the liberated isocitrate to alpha-ketoglutarate was achieved in solution as well as in wild-type and mutant isocitrate dehydrogenase (IDH) protein crystals. The X-ray crystal structures of wild-type IDH soaked with photolabile caged isocitrate and Mg2+ and void of nicotinamide adenine dinucleotide phosphate were solved at 2.5 Angstrom resolution before and after photolysis and compared by difference mapping against previously determined enzyme structures, Prior to photolysis the enzyme active site contains a low occupancy of bound free Mg2+ in the metal binding site but no observable bound isocitrate, whereas after photolysis the enzyme is complexed to liberated isocitrate and Mg2+ with binding interactions identical to those of previously determined substrate complexes. Single-crystal spectroscopy of the crystals after flash photolysis in the presence of substrates shows production of bound enzyme-substrate complexes and reduced nicotinamide adenine dinucleotide phosphate induced by the photolytic event.
C1 UNIV CALIF BERKELEY, DEPT MOLEC & CELL BIOL, BERKELEY, CA 94720 USA.
UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR ADV MAT, BERKELEY, CA 94720 USA.
UNIV WASHINGTON, FRED HUTCHINSON CANC RES CTR, DIV BASIC SCI, PROGRAM STRUCT BIOL, SEATTLE, WA 98104 USA.
FU NIGMS NIH HHS [R01-GM49857]
NR 31
TC 16
Z9 17
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0006-2960
J9 BIOCHEMISTRY-US
JI Biochemistry
PD MAR 5
PY 1996
VL 35
IS 9
BP 2854
EP 2864
DI 10.1021/bi951105v
PG 11
WC Biochemistry & Molecular Biology
SC Biochemistry & Molecular Biology
GA TZ118
UT WOS:A1996TZ11800007
PM 8608121
ER
PT J
AU Chen, JB
Young, VG
Angelici, RJ
AF Chen, JB
Young, VG
Angelici, RJ
TI Reactions of the iridathiabenzene complex Cp*Ir(2,5-dimethylthiophene)
with Co-2(CO)(8), Co-4(CO)(12), and (eta(6)-C(6)H(3)Me(3))Co-4(CO)(9)
SO ORGANOMETALLICS
LA English
DT Article
ID 3 METAL CENTERS; THIOPHENE COORDINATION; 2,5-DIMETHYLTHIOPHENE
COORDINATION; IRON CARBONYLS; CP-STAR-IR(2,5-DIMETHYLTHIOPHENE)
AB With the goal of preparing an eta(6)-iridathiabenzene complex of CO4(CO)(12), the ring-opened iridathiabenzene complex Cp*Ir(C,S-2,5-Me(2)T) (1), where 2,5-Me(2)T is 2,5-dimethylthiophene, was reacted with Co-4(CO)(12), Co-2(CO)(8), and (eta(6)-C(6)H(3)Me(3))Co-4(CO)(9). Only in the reaction of (eta(6)-C(6)H(3)Me(3))CO4(CO)(9) under mild conditions (35-40 degrees C) was the eta(6)-iridathiabenzene cluster [eta(6)-Cp*Ir(C,S-2,5-Me(2)T)] Co-4(CO)(9) (7) obtained. At higher temperatures, the reaction yielded Cp*Ir(eta(4)2,5-Me(2)T . Co-4(CO)(11)) (6), in which the 2,5-Me(2)T ligand is coordinated through its diene to the Ir and through its sulfur to a Co of the cluster. Reactions of Co-4(CO)(12) and Co-2(CO)(8) with 1 yielded Cp*Ir(eta(4)-2,5-Me(2)T . Co-4(CO)(11)) (2), an isomer of 6, which converts to the desulfurized linear tetranuclear cluster [Cp*Ir(C(Me)=CHCH-C(Me))(mu-CO)(2)Co](2) (3); this species contains bridging iridacyclopentadiene units. Cluster 3 has a structure with a Co-2(mu-CO)(2) core and Cp*Ir(C(Me)=CHCH=C(Me))(CO) (4) end groups. In fact, 3 can be prepared from Co-2(CO)(8) and 4. Molecular structures of 2-4 are reported, together with a discussion of pathways that lead to their formation.
C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
CHINESE ACAD SCI,SHANGHAI INST ORGAN CHEM,SHANGHAI 200032,PEOPLES R CHINA.
NR 31
TC 15
Z9 15
U1 1
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD MAR 5
PY 1996
VL 15
IS 5
BP 1414
EP 1421
DI 10.1021/om950702a
PG 8
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA TY931
UT WOS:A1996TY93100014
ER
PT J
AU Schwartz, DJ
Smith, MR
Andersen, RA
AF Schwartz, DJ
Smith, MR
Andersen, RA
TI Synthesis and properties of the titanaoxacyclobutane derived from
(Me(5)C(5))(2)Ti(O)(L) and allene
SO ORGANOMETALLICS
LA English
DT Article
ID OXYGEN-ATOM TRANSFER; X-RAY STRUCTURE; TRAPPING REACTIONS;
ORGANIC-MOLECULES; NITROUS-OXIDE; DECOMPOSITION; INSERTION; OLEFIN;
BONDS; OXAMETALLACYCLOBUTANES
AB The oxo compound (C(5)Me(5))(2)TiO(pyr) (1) undergoes a 2 + 2 cycloaddition reaction with allene to give (Me(5)C(5))(2)Ti[OC(CH2)CH2] (2), which contains a puckered TiOC2 ring in the solid state. The metallacyclobutane 2 does not exchange with either free allene or pyridine on the NMR time scale and slowly converts to the ring-metalated product (C(5)Me(5))(C(5)Me(4)-CH2)Ti[OC(CH2)Me] (3) in solution and to the enolate complex (C(5)Me(5))(2)Ti[H][OC(CH2)Me] (4) in the presence of 1 atm of H-2.
C1 UNIV CALIF BERKELEY,DEPT CHEM,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,DIV CHEM SCI,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
RI Smith, Milton/M-3511-2016
OI Smith, Milton/0000-0002-8036-4503
NR 38
TC 27
Z9 27
U1 0
U2 2
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD MAR 5
PY 1996
VL 15
IS 5
BP 1446
EP 1450
DI 10.1021/om950634s
PG 5
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA TY931
UT WOS:A1996TY93100019
ER
PT J
AU Butcher, RJ
Clark, DL
Grumbine, SK
Scott, BL
Watkin, JG
AF Butcher, RJ
Clark, DL
Grumbine, SK
Scott, BL
Watkin, JG
TI Mono(pentamethylcyclopentadienyl)thorium chemistry: Synthesis,
structural characterization, and reactivity of aryloxide and alkyl
derivatives
SO ORGANOMETALLICS
LA English
DT Article
ID X-RAY CRYSTAL; ORGANOACTINIDE COORDINATIVE UNSATURATION; ACTINIDE
ALKOXIDE CHEMISTRY; CARBON-MONOXIDE ACTIVATION; OXYGEN-DONOR COMPLEXES;
LEWIS BASE ADDUCTS; F-BLOCK METALS; CYCLOMETALATION CHEMISTRY;
MOLECULAR-STRUCTURE; HYDROGEN BONDS
AB Reaction of ThBr4(THF)(4) with 1 equiv of Cp*MgBr(THF) (Cp* = eta-C(5)Me(5)) produces the mono(pentamethylcyclopentadienyl) complex Cp*ThBr3(THF)(3) (1). Treatment of 1 with 1 or 2 equiv of KOAr (Ar = 2,6-t-Bu(2)C(6)H(3)) yields the mono- and bis(aryloxide) species Cp*ThBr2(OAr)(THF) (2) and Cp*ThBr(OAr)(2) (3), respectively, Alkylation of 2 with 2 equiv of Me(3)SiCH(2)MgCl leads to isolation of the bis(alkyl) complex Cp*Th(OAr)(CH(2)SiMe(3))(2) (4), while 3 reacts with 1 equiv of MeMgBr to form the mono(alkyl) derivative Cp*ThMe(OAr)2 (5). 4 reacts with dihydrogen to produce the trimeric thorium dihydride [Cp*ThH2(OAr)](3) (6), while thermolysis of 4 in the presence of triphenylphosphine oxide leads to the isolation of the metallacyclic species Cp*Th(OC6H3-t-BuCMe(2)CH(2))(OAr)(O=PPh(3)) (7). In the presence of 1 equiv of [HNMe(2)Ph][B(C6F5)(4)], 4 is found to catalyze the hydrogenation of l-hexene and also the polymerization of ethylene. Compounds 1-7 have been characterized by H-1 NMR and IR spectroscopy, by microanalysis, and, in the case of 3, 4, and 7, by single-crystal X-ray diffraction studies. Cp*ThBr(OAr)(2)(3) exhibits a somewhat distorted three-legged piano-stool geometry with Th-Cp*(centroid), Th-O, and Th-Br distances of 2.57(1), 2.16(1) (av), and 2.821(2) Angstrom, respectively. Cp*Th(OAr)(CH(2)SiMe(3))(2) (4) also displays a three-legged piano-stool geometry with Th-C distances to the alkyl groups of 2.460(9) and 2.488(12) Angstrom. Th-Cp*(centroid) and Th-O distances are very similar to those found in 3, at 2.53(1) and 2.186(6) Angstrom, respectively. Cp*Th(OC6H3-t-BuCMe(2)CH(2))(OAr)(O = PPh(3)) (7) features a distorted trigonal bipyramidal geometry about the metal center, with the Cp* ligand and the oxygen atom of the cyclometalated aryloxide ligand occupying axial sites (Cp*(centroid)-Th-O = 168.3(3)degrees). The Th-C distance to the tert-butyl methylene group is 2.521(12) Angstrom, while Th-O distances to the aryloxide and triphenylphosphine oxide ligands are 2.199(7) (av) and 2.445(7) Angstrom, respectively.
C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545.
RI Clark, David/A-9729-2011; Scott, Brian/D-8995-2017
OI Scott, Brian/0000-0003-0468-5396
NR 80
TC 21
Z9 21
U1 1
U2 4
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0276-7333
J9 ORGANOMETALLICS
JI Organometallics
PD MAR 5
PY 1996
VL 15
IS 5
BP 1488
EP 1496
DI 10.1021/om9508694
PG 9
WC Chemistry, Inorganic & Nuclear; Chemistry, Organic
SC Chemistry
GA TY931
UT WOS:A1996TY93100025
ER
PT J
AU Yang, XG
McBranch, D
Swanson, B
Li, DQ
AF Yang, XG
McBranch, D
Swanson, B
Li, DQ
TI Synthesis and NLO properties of polar self-assemblies of molecular
pyramids covalently bound on oxide surfaces
SO ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH
LA English
DT Article
DE calixarenes; monolayers; NLO materials; nonlinear optics
ID MULTILAYERS; ORIENTATION
C1 LOS ALAMOS NATL LAB,CHEM SCI & TECHNOL DIV,LOS ALAMOS,NM 87545.
NR 17
TC 44
Z9 44
U1 1
U2 5
PU VCH PUBLISHERS INC
PI DEERFIELD BEACH
PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788
SN 0570-0833
J9 ANGEW CHEM INT EDIT
JI Angew. Chem.-Int. Edit. Engl.
PD MAR 4
PY 1996
VL 35
IS 5
BP 538
EP 540
DI 10.1002/anie.199605381
PG 3
WC Chemistry, Multidisciplinary
SC Chemistry
GA UB214
UT WOS:A1996UB21400014
ER
PT J
AU Kurtz, SR
Biefeld, RM
Allerman, AA
Howard, AJ
Crawford, MH
Pelczynski, MW
AF Kurtz, SR
Biefeld, RM
Allerman, AA
Howard, AJ
Crawford, MH
Pelczynski, MW
TI Pseudomorphic InAsSb multiple quantum well injection laser emitting at
3.5 mu m
SO APPLIED PHYSICS LETTERS
LA English
DT Article
AB A pseudomorphic, compressively strained InAs0.94Sb0.06 multiple quantum well injection laser, emitting in the 3.5-3.6 mu m range is reported. The device was grown by metalorganic chemical vapor deposition, and x-ray and optical characterization indicate that the active region has a very low dislocation density. in pulsed mode, the laser operated at 135 K and displayed a characteristic temperature of 33 K, equaling the highest value reported for molecular-beam epitaxy grown, InAsSb/InAlAsSb active region lasers of comparable wavelength. Factors limiting the performance of these lasers are discussed. (C) 1996 American Institute of Physics.
RP Kurtz, SR (reprint author), SANDIA NATL LABS,ALBUQUERQUE,NM 87185, USA.
NR 15
TC 44
Z9 44
U1 1
U2 6
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 4
PY 1996
VL 68
IS 10
BP 1332
EP 1334
DI 10.1063/1.115925
PG 3
WC Physics, Applied
SC Physics
GA TX861
UT WOS:A1996TX86100008
ER
PT J
AU Brundermann, E
Linhart, AM
Roser, HP
Dubon, OD
Hansen, WL
Haller, EE
AF Brundermann, E
Linhart, AM
Roser, HP
Dubon, OD
Hansen, WL
Haller, EE
TI Miniaturization of p-Ge lasers: Progress toward continuous wave
operation
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID FAR-INFRARED LASER; STIMULATED-EMISSION; MAGNETIC-FIELDS
AB We have observed intervalence band laser action in Al-doped germanium crystals with volumes as small as 0.03 cm(3), one order of magnitude smaller than previously studied p-Ge laser crystals. A duty cycle of 1.5X10(-4) was achieved. We show evidence that crystal heating plays a key role in the duration of the emission pulse and have measured a maximum pulse length of 11 mu s for a 0.43 cm(3) Ga-doped germanium crystal. Such progress in the understanding and performance of p-Ge hot hole lasers marks a significant step toward continuous wave operation.
C1 UNIV CALIF BERKELEY,BERKELEY,CA 94720.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
RP Brundermann, E (reprint author), DLR,INST SPACE SENSOR TECHNOL,D-12489 BERLIN,GERMANY.
RI Bruendermann, Erik/J-7186-2016
OI Bruendermann, Erik/0000-0003-4119-3489
NR 14
TC 21
Z9 21
U1 0
U2 0
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD MAR 4
PY 1996
VL 68
IS 10
BP 1359
EP 1361
PG 3
WC Physics, Applied
SC Physics
GA TX861
UT WOS:A1996TX86100017
ER
PT J
AU Weston, RE
AF Weston, RE
TI Pegram lectures
SO CHEMICAL & ENGINEERING NEWS
LA English
DT Letter
RP Weston, RE (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0009-2347
J9 CHEM ENG NEWS
JI Chem. Eng. News
PD MAR 4
PY 1996
VL 74
IS 10
BP 41
EP &
PG 2
WC Chemistry, Multidisciplinary; Engineering, Chemical
SC Chemistry; Engineering
GA TY382
UT WOS:A1996TY38200021
ER
PT J
AU Veil, JA
Burke, CJ
Moses, DO
AF Veil, JA
Burke, CJ
Moses, DO
TI Synthetic-based muds can improve drilling efficiency without polluting
SO OIL & GAS JOURNAL
LA English
DT Article
C1 US DOE,WASHINGTON,DC 20545.
RP Veil, JA (reprint author), ARGONNE NATL LAB,WASHINGTON,DC, USA.
NR 17
TC 0
Z9 1
U1 0
U2 0
PU PENNWELL PUBL CO ENERGY GROUP
PI TULSA
PA 1421 S SHERIDAN RD PO BOX 1260, TULSA, OK 74101
SN 0030-1388
J9 OIL GAS J
JI Oil Gas J.
PD MAR 4
PY 1996
VL 94
IS 10
BP 49
EP 54
PG 6
WC Energy & Fuels; Engineering, Petroleum
SC Energy & Fuels; Engineering
GA TZ937
UT WOS:A1996TZ93700017
ER
PT J
AU Khoo, TL
Carpenter, MP
Lauritsen, T
Ackermann, D
Ahmad, I
Blumenthal, DJ
Fischer, SM
Janssens, RVF
Nisius, D
Moore, EF
LopezMartens, A
Dossing, T
Kruecken, R
Asztalos, SJ
Becker, JA
Bernstein, L
Clark, RM
Deleplanque, MA
Diamond, RM
Fallon, P
Farris, LP
Hannachi, F
Henry, EA
Korichi, A
Lee, IY
Macchiavelli, AO
Stephens, FS
AF Khoo, TL
Carpenter, MP
Lauritsen, T
Ackermann, D
Ahmad, I
Blumenthal, DJ
Fischer, SM
Janssens, RVF
Nisius, D
Moore, EF
LopezMartens, A
Dossing, T
Kruecken, R
Asztalos, SJ
Becker, JA
Bernstein, L
Clark, RM
Deleplanque, MA
Diamond, RM
Fallon, P
Farris, LP
Hannachi, F
Henry, EA
Korichi, A
Lee, IY
Macchiavelli, AO
Stephens, FS
TI Excitation energies and spins of a superdeformed band in Hg-194 from
one-step discrete decays to the yrast line
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID NUCLEI; STATES
AB Discrete gamma rays directly connecting states of a superdeformed (SD) band in Hg-194 to the yrast states have been discovered. Thus, the excitation energies and spins of all members of the lowest SD band are established for the first time, together with their likely parity. The SD band decays from its 10(+) and 12(+) states, which lie 4204.8 and 4407.4 keV above the normal-deformed yrast states of the same spins.
C1 N CAROLINA STATE UNIV,RALEIGH,NC 27695.
TRIANGLE UNIV NUCL LAB,DURHAM,NC 27708.
CNRS,IN2P3,CTR SPECTROMETRIE NUCL & SPECTROMETRIE MASSE,F-91405 ORSAY,FRANCE.
NIELS BOHR INST,DK-2100 COPENHAGEN 0,DENMARK.
LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
CNRS,IN2P3,INST PHYS NUCL,F-9140 ORSAY,FRANCE.
RP Khoo, TL (reprint author), ARGONNE NATL LAB,ARGONNE,IL 60439, USA.
RI Carpenter, Michael/E-4287-2015; Kruecken, Reiner/A-1640-2013
OI Carpenter, Michael/0000-0002-3237-5734; Kruecken,
Reiner/0000-0002-2755-8042
NR 31
TC 145
Z9 145
U1 1
U2 6
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 4
PY 1996
VL 76
IS 10
BP 1583
EP 1586
DI 10.1103/PhysRevLett.76.1583
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TX696
UT WOS:A1996TX69600007
ER
PT J
AU Brizard, AJ
Kaufman, AN
AF Brizard, AJ
Kaufman, AN
TI How a wave flips its energy sign by linear conversion
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID JET
AB An inverted population of energetic minority ions, such as neonatal fusion alphas, can support a negative-energy Bernstein wave (whose frequency is a harmonic of their gyrofrequency). As a result of the magnetic-field nonuniformity and the population inversion, the wave crosses the gyroresonance layer and its energy flips sign. This results in energy transfer to a gyroballistic mode (which exists only in the resonance layer), with a conversion coefficient exactly equal to 2.
RP Brizard, AJ (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA.
OI Brizard, Alain/0000-0002-0192-6273
NR 3
TC 6
Z9 6
U1 0
U2 0
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 4
PY 1996
VL 76
IS 10
BP 1639
EP 1642
DI 10.1103/PhysRevLett.76.1639
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TX696
UT WOS:A1996TX69600021
ER
PT J
AU Bulaevskii, LN
Pokrovsky, VL
Maley, MP
AF Bulaevskii, LN
Pokrovsky, VL
Maley, MP
TI Field dependence of c-axis plasma resonance in Josephson-coupled
superconductors
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID VORTEX STATE; PHASE; SYSTEMS
AB The field and temperature dependence of the c-axis plasma frequency in Josephson-coupled layered superconductors is considered. In the zero-temperature limit the field dependence is expressed via the correlator of pancake density between adjacent layers. In the case of strong pinning, when ordering of pancakes along the c axis is destroyed, the predicted power-law field dependence is found to be in agreement with the experimental data for Bi2Sr2CaCU2O8+delta. For weaker pinning, the field dependence is different. Thus information on the pancake arrangement in the vortex glass phase can be obtained from plasma frequency measurements.
C1 TEXAS A&M UNIV,DEPT PHYS,COLLEGE STN,TX 77843.
LD LANDAU THEORET PHYS INST,MOSCOW 117940,RUSSIA.
RP Bulaevskii, LN (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA.
NR 26
TC 79
Z9 79
U1 1
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 4
PY 1996
VL 76
IS 10
BP 1719
EP 1722
DI 10.1103/PhysRevLett.76.1719
PG 4
WC Physics, Multidisciplinary
SC Physics
GA TX696
UT WOS:A1996TX69600041
ER
PT J
AU Carlisle, JA
Shirley, EL
Hudson, EA
Terminello, LJ
Callcott, TA
Jia, JJ
Ederer, DL
Perera, RCC
Himpsel, FJ
AF Carlisle, JA
Shirley, EL
Hudson, EA
Terminello, LJ
Callcott, TA
Jia, JJ
Ederer, DL
Perera, RCC
Himpsel, FJ
TI Core Hole effects in resonant inelastic x-ray scattering of graphite -
Reply
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
C1 NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899.
UNIV TENNESSEE,KNOXVILLE,TN 37966.
TULANE UNIV,NEW ORLEANS,LA 70118.
LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
IBM CORP,THOMAS J WATSON RES CTR,DIV RES,YORKTOWN HTS,NY 10598.
RP Carlisle, JA (reprint author), LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94551, USA.
NR 6
TC 12
Z9 12
U1 0
U2 1
PU AMERICAN PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD MAR 4
PY 1996
VL 76
IS 10
BP 1762
EP 1762
DI 10.1103/PhysRevLett.76.1762
PG 1
WC Physics, Multidisciplinary
SC Physics
GA TX696
UT WOS:A1996TX69600054
ER
PT J
AU Xue, QF
Yeung, ES
AF Xue, QF
Yeung, ES
TI Determination of lactate dehydrogenase isoenzymes in single lymphocytes
from normal and leukemia cell lines
SO JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL
AND LIFE SCIENCES
LA English
DT Article
DE lactate dehydrogenase; enzymes; isoenzymes
ID CAPILLARY ELECTROPHORESIS; QUANTITATIVE-DETERMINATION; FLUORESCENCE
DETECTION; CANCER; DOPAMINE
AB This work demonstrates that our previously developed technique for single-erythrocyte analysis by capillary electrophoresis with laser-induced fluorescence detection (CE-LIF) can be applied to study individual lymphocytes, with some modification in the cell lysing procedure. A tesla coil was shown to be capable of lysing the lymphocyte cells inside the capillary. The electromagnetic field induced by the tesla coil was believed to be responsible for breaking the cell membrane. The lactate dehydrogenase (LDH) isoenzyme activities and the relative ratios between different LDH isoenzymes were measured for normal lymphocytes as well as B-type and T-type acute lymphoblastic leukemia cells. Both the LDH activity and the isoenzyme ratios show large variations among individual cells. The former is expected due to variations in cell size. The latter implies that single-cell measurements are less useful than the average values over a cell population as markers for leukemia.
C1 IOWA STATE UNIV SCI & TECHNOL, AMES LAB, USDOE, AMES, IA 50011 USA.
IOWA STATE UNIV SCI & TECHNOL, DEPT CHEM, AMES, IA 50011 USA.
NR 32
TC 50
Z9 54
U1 1
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 1570-0232
J9 J CHROMATOGR B
JI J. Chromatogr. B
PD MAR 3
PY 1996
VL 677
IS 2
BP 233
EP 240
DI 10.1016/0378-4347(95)00467-X
PG 8
WC Biochemical Research Methods; Chemistry, Analytical
SC Biochemistry & Molecular Biology; Chemistry
GA UE061
UT WOS:A1996UE06100004
PM 8704926
ER
PT J
AU Freund, RW
Nachtigal, NM
AF Freund, RW
Nachtigal, NM
TI QMRPACK: A package of QMR algorithms
SO ACM TRANSACTIONS ON MATHEMATICAL SOFTWARE
LA English
DT Article
DE algorithms; reliability; theory; coupled two-term recurrences;
eigenvalues; iterative method; Krylov subspace; Lanczos method;
look-ahead; linear systems; non-Hermitian matrices; quasiminimal
residual property; three-term recurrences; transfer functions
ID HERMITIAN LINEAR-SYSTEMS; AHEAD LANCZOS-ALGORITHM; MATRICES;
IMPLEMENTATION
AB The quasi-minimal residual (QMR) algorithm is a Krylov-subspace method for the iterative solution of large non-Hermitian linear systems. QMR is based on the look-ahead Lanczos algorithm that, by itself, can also be used to obtain approximate eigenvalues of large non-Hermitian matrices. QMRPACK is a software package with Fortran 77 implementations of the QMR algorithm and variants thereof, and of the three-term and coupled two-term look-ahead Lanczos algorithms. In this article, we discuss some of the features of the algorithms in the package, with emphasis on the issues related to using the codes. We describe in some detail two routines from the package, one for the solution of linear systems and the other for the computation of eigenvalue approximations. We present some numerical examples from applications where QMRPACK was used.
C1 OAK RIDGE NATL LAB, MATH SCI SECT, OAK RIDGE, TN 37831 USA.
RP Freund, RW (reprint author), AT&T BELL LABS, 600 MT AVE, ROOM 2C-420, MURRAY HILL, NJ 07974 USA.
NR 32
TC 42
Z9 42
U1 0
U2 0
PU ASSOC COMPUTING MACHINERY
PI NEW YORK
PA 2 PENN PLAZA, STE 701, NEW YORK, NY 10121-0701 USA
SN 0098-3500
J9 ACM T MATH SOFTWARE
JI ACM Trans. Math. Softw.
PD MAR
PY 1996
VL 22
IS 1
BP 46
EP 77
DI 10.1145/225545.225551
PG 32
WC Computer Science, Software Engineering; Mathematics, Applied
SC Computer Science; Mathematics
GA UD403
UT WOS:A1996UD40300006
ER
PT J
AU Hill, JP
McMorrow, DF
AF Hill, JP
McMorrow, DF
TI X-ray resonant exchange scattering: Polarization dependence and
correlation functions
SO ACTA CRYSTALLOGRAPHICA SECTION A
LA English
DT Article
ID MAGNETIC SCATTERING; DIFFRACTION; DICHROISM; HOLMIUM
AB The cross section for X-ray resonant exchange scattering is reformulated in terms of linear polarization states perpendicular and parallel to the scattering plane, a basis particularly well suited to synchrotron X-ray diffraction experiments. The explicit polarization dependence of the terms is calculated for the electric dipole and quadrupole contributions. This expression, in turn, is rewritten in an orthonormal basis to highlight the dependence of the cross section on each component of the magnetic moment. This has the benefit of providing an empirically useful expression for the cross section. Diffraction patterns from a few simple magnetic structures are calculated Finally, the correlation function measured at each resonant harmonic is derived.
C1 RISO NATL LAB,DEPT SOLID STATE PHYS,DK-4000 ROSKILDE,DENMARK.
RP Hill, JP (reprint author), BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973, USA.
RI McMorrow, Desmond/C-2655-2008; Hill, John/F-6549-2011
OI McMorrow, Desmond/0000-0002-4947-7788;
NR 31
TC 259
Z9 259
U1 3
U2 25
PU MUNKSGAARD INT PUBL LTD
PI COPENHAGEN
PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK
SN 0108-7673
J9 ACTA CRYSTALLOGR A
JI Acta Crystallogr. Sect. A
PD MAR 1
PY 1996
VL 52
BP 236
EP 244
DI 10.1107/S0108767395012670
PN 2
PG 9
WC Chemistry, Multidisciplinary; Crystallography
SC Chemistry; Crystallography
GA UD232
UT WOS:A1996UD23200013
ER
PT J
AU Harp, JM
Uberbacher, EC
Roberson, AE
Palmer, EL
Gewiess, A
Bunick, GJ
AF Harp, JM
Uberbacher, EC
Roberson, AE
Palmer, EL
Gewiess, A
Bunick, GJ
TI X-ray diffraction analysis of crystals containing twofold symmetric
nucleosome core particles
SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
LA English
DT Article
ID HISTONE OCTAMER; DNA; RESOLUTION; DEOXYRIBONUCLEASE; SUPERHELIX
AB Nucleosome core particles containing a DNA palindrome and purified chicken erythrocyte histone octamer have been reconstituted and crystallized. The dyad symmetry of the palindrome extends the dyad symmetry of the histone octamer to result in a twofold symmetric particle. This ensures that the structure determined by X-ray diffraction will yield a true representation of the DNA strand rather than the twofold averaged structure which would result from using a non-palindromic DNA sequence. The crystals provide isotropic diffraction to 3.2 Angstrom with observed reflections extending to d spacings of about 2.8 Angstrom using a rotating-anode CuK alpha X-ray source. Although the DNA palindrome is a factor contributing to the quality of the diffraction data, another significant factor is an improved preparative technique which enriches for correctly phased nucleosome core particles.
C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831.
RP Harp, JM (reprint author), UNIV TENNESSEE,GRAD SCH BIOMED SCI,OAK RIDGE,TN 37831, USA.
NR 24
TC 26
Z9 27
U1 0
U2 5
PU MUNKSGAARD INT PUBL LTD
PI COPENHAGEN
PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK
SN 0907-4449
J9 ACTA CRYSTALLOGR D
JI Acta Crystallogr. Sect. D-Biol. Crystallogr.
PD MAR 1
PY 1996
VL 52
BP 283
EP 288
DI 10.1107/S0907444995009139
PN 2
PG 6
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA UF186
UT WOS:A1996UF18600006
PM 15299701
ER
PT J
AU Rupp, B
Marshak, DR
Parkin, S
AF Rupp, B
Marshak, DR
Parkin, S
TI Crystallization and preliminary X-ray analysis of two new crystal forms
of calmodulin
SO ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
LA English
DT Article
ID RESOLUTION; DIFFRACTION
AB Two new crystal forms of calmodulin from Gallus gallus are reported. Crystals in space group P1 (cell dimensions a = 59.7, b = 53.1, c = 24.6 Angstrom, alpha = 93.2, beta = 96.7, gamma = 89.2 degrees and Z = 2), grow as long thin needles. Water content on density considerations is similar to 50%. They diffract to similar to 2.0 Angstrom, but give wide multiply peaked spot profiles. Crystals in space group P2(1)2(1)2(1) (cell dimensions a = 32.2, b = 56.0, c = 67.3 Angstrom and Z = 4), grow as clusters of thin tablets and contain similar to 30% water by volume. These small crystals (similar to 0.4 x 0.15 x 0.1 mm) diffracted well to similar to 1.4 Angstrom and some appreciable intensities were observed at resolutions better than 1.2 Angstrom.
C1 COLD SPRING HARBOR LAB,COLD SPRING HARBOR,NY 11724.
RP Rupp, B (reprint author), LAWRENCE LIVERMORE NATL LAB,BIOL & BIOTECHNOL PROGRAM,POB 808,LIVERMORE,CA 94551, USA.
RI Parkin, Sean/E-7044-2011
NR 14
TC 16
Z9 16
U1 0
U2 2
PU MUNKSGAARD INT PUBL LTD
PI COPENHAGEN
PA 35 NORRE SOGADE, PO BOX 2148, DK-1016 COPENHAGEN, DENMARK
SN 0907-4449
J9 ACTA CRYSTALLOGR D
JI Acta Crystallogr. Sect. D-Biol. Crystallogr.
PD MAR 1
PY 1996
VL 52
BP 411
EP 413
DI 10.1107/S0907444995011826
PN 2
PG 3
WC Biochemical Research Methods; Biochemistry & Molecular Biology;
Biophysics; Crystallography
SC Biochemistry & Molecular Biology; Biophysics; Crystallography
GA UF186
UT WOS:A1996UF18600020
PM 15299715
ER
PT J
AU Wang, JN
AF Wang, JN
TI Microphysical model of Harper-Dorn creep
SO ACTA MATERIALIA
LA English
DT Article
ID SELF-DIFFUSION; SINGLE-CRYSTALS; VISCOUS CREEP; LOW STRESSES; NASI-CAAL;
OXYGEN; INTERDIFFUSION; ZIRCONIUM; TITANIUM; QUARTZ
AB Using experimental data for Harper-Dorn creep in different materials, it is demonstrated that the flow process in this creep may be dislocation glide plus climb with the climb being rate-controlling under a constant dislocation density determined by the magnitude of the Peierls stress. A rate equation is presented which may be used to predict the occurrence of Harper-Dorn creep in any crystalline material.
RP LAWRENCE LIVERMORE NATL LAB, L-370, LIVERMORE, CA 94551 USA.
NR 64
TC 30
Z9 30
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 1359-6454
EI 1873-2453
J9 ACTA MATER
JI Acta Mater.
PD MAR
PY 1996
VL 44
IS 3
BP 855
EP 862
PG 8
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA TY883
UT WOS:A1996TY88300002
ER
PT J
AU Huang, Y
Liu, C
Stout, MG
AF Huang, Y
Liu, C
Stout, MG
TI A Brazilian disk for measuring fracture toughness of orthotropic
materials
SO ACTA MATERIALIA
LA English
DT Article
ID MODE FRACTURE; COMPOSITES; SPECIMENS; STRENGTH
AB A Brazilian disk test specimen is calibrated for the determination of the mixed-mode fracture toughness of orthotropic materials. The specimen is well-suited for investigating the fracture toughness of orthotropic materials over the complete range of mode mixtures, 0-90 degrees. The K dominance zone around the crack tip exists and can be as large as a/5 for the Brazilian disk, provided that the zone of nonlinear effects is small (a is the half-crack length). The rationale for determining the stress intensity factors under mixed-mode loading conditions and the calibration curves, relevant to a number of orthotropic materials, relating maximum load and loading angle to K-I and K-II are presented.
C1 LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545.
RP Huang, Y (reprint author), MICHIGAN TECHNOL UNIV,DEPT MECH ENGN ENGN MECH,HOUGHTON,MI 49931, USA.
RI Huang, Yonggang/B-6998-2009
NR 19
TC 11
Z9 12
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 1359-6454
J9 ACTA MATER
JI Acta Mater.
PD MAR
PY 1996
VL 44
IS 3
BP 1223
EP 1232
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA TY883
UT WOS:A1996TY88300035
ER
PT J
AU Sugama, T
Carciello, N
AF Sugama, T
Carciello, N
TI Sodium metasilicate-modified lightweight high alumina cements for use as
geothermal well-cementing materials
SO ADVANCED CEMENT BASED MATERIALS
LA English
DT Article
DE geothermal cement; high alumina cement; lightweight slurry; microsphere;
sodium metasilicate
AB In studying the use of sodium metasilicate (SMS)-modified high alumina cements containing mullite-shelled microspheres as light-weight geothermal cementitious materials, we found that the following were the most advantageous characteristics of the slurries and of the 200 and 300 degrees C autoclaved cements: (1) the slurries have a low density of <1.25 g/cc, (2) the incorporation of SMS retarded the setting of the cements, (3) sodium calcium silicate hydrate and boehmite were formed in the matrix phase by hydrothermal reactions between the cement and SMS, and (4) there was a favorable reaction between the mullite shell layer in the hollow microspheres and the SMS to form analcime and boehmite phases. For characteristics (3) and (4), the pronounced development of these phases at 300 degrees C generated a dense microstructure in the cements and was reflected on a reduced water permeability and a low rate of porosity.
RP Sugama, T (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,ENERGY EFFICIENCY & CONSERVAT DIV,UPTON,NY 11973, USA.
NR 8
TC 7
Z9 7
U1 1
U2 7
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010
SN 1065-7355
J9 ADV CEM BASED MATER
JI Adv. Cem. Based Mater.
PD MAR
PY 1996
VL 3
IS 2
BP 45
EP 53
DI 10.1016/S1065-7355(96)90071-1
PG 9
WC Construction & Building Technology; Materials Science, Multidisciplinary
SC Construction & Building Technology; Materials Science
GA TX520
UT WOS:A1996TX52000001
ER
PT J
AU Rotter, JI
Bu, XD
Cantor, RM
Warden, CH
Brown, J
Gray, RJ
Blanche, PJ
Krauss, RM
Lusis, AJ
AF Rotter, JI
Bu, XD
Cantor, RM
Warden, CH
Brown, J
Gray, RJ
Blanche, PJ
Krauss, RM
Lusis, AJ
TI Multilocus genetic determinants of LDL particle size in coronary artery
disease families
SO AMERICAN JOURNAL OF HUMAN GENETICS
LA English
DT Article
ID LOW-DENSITY-LIPOPROTEIN; POLYMERASE CHAIN-REACTION; APOLIPOPROTEIN-B;
COMBINED HYPERLIPIDEMIA; SUBCLASS PHENOTYPES; HEART-DISEASE; REPEAT
POLYMORPHISM; QUANTITATIVE TRAIT; INSULIN-RESISTANCE; LINKAGE ANALYSIS
AB Recent interest in atherosclerosis has focused on the genetic determinants of low-density lipoprotein (LDL) particle size, because of (i) the association of small dense LDL particles with a three-fold increased risk for coronary artery disease (CAD) and (ii) the recent report of linkage of the trait to the LDL receptor (chromosome 19). By utilizing nonparametric quantitative sib-pair and relative-pair-analysis methods in CAD families, we tested for linkage of a gene or genes controlling LDL particle sizes with the genetic loci for the major apolipoproteins and enzymes participating in lipoprotein metabolism. We confirmed evidence for linkage to the LDL receptor locus (P = .008). For six candidate gene loci, including apolipoprotein(apo)B, apoAII, apo(a), apoE-CI-CII, lipoprotein lipase, and high-density lipoprotein-binding protein, no evidence for linkage was observed by sib-pair linkage analyses (P values ranged from .24 to .81). However, in addition, we did find tentative evidence for linkage with the apoAI-CIII-AIV locus (chromosome 11) (P = .06) and significant evidence for linkage of the cholesteryl ester transfer protein locus (chromosome 16) (P = .01) and the manganese superoxide dismutase locus (chromosome 6) (P = .001), thus indicating multilocus determination of this atherogenic trait.
C1 CEDARS SINAI MED CTR, DIV MED GENET, DEPT PEDIAT, LOS ANGELES, CA 90048 USA.
CEDARS SINAI MED CTR, DIV CARDIOL, DEPT PEDIAT, LOS ANGELES, CA 90048 USA.
CEDARS SINAI MED CTR, DIV CARDIOL, DEPT MED, LOS ANGELES, CA 90048 USA.
UNIV CALIF LOS ANGELES, DEPT MED, LOS ANGELES, CA 90024 USA.
UNIV CALIF LOS ANGELES, DEPT MICROBIOL, LOS ANGELES, CA 90024 USA.
UNIV CALIF LOS ANGELES, DEPT MOLEC GENET, LOS ANGELES, CA 90024 USA.
UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, DIV LIFE SCI, BERKELEY, CA USA.
RP Rotter, JI (reprint author), CEDARS SINAI MED CTR, DIV MED GENET, DEPT MED, SSB-3, 8700 BEVERELY BLVD, LOS ANGELES, CA 90048 USA.
FU NHLBI NIH HHS [HL18574, HL28481]
NR 74
TC 77
Z9 78
U1 0
U2 1
PU CELL PRESS
PI CAMBRIDGE
PA 600 TECHNOLOGY SQUARE, 5TH FLOOR, CAMBRIDGE, MA 02139 USA
SN 0002-9297
EI 1537-6605
J9 AM J HUM GENET
JI Am. J. Hum. Genet.
PD MAR
PY 1996
VL 58
IS 3
BP 585
EP 594
PG 10
WC Genetics & Heredity
SC Genetics & Heredity
GA TV564
UT WOS:A1996TV56400017
PM 8644718
ER
PT J
AU PaganiniHill, A
Dworsky, R
Krauss, RM
AF PaganiniHill, A
Dworsky, R
Krauss, RM
TI Hormone replacement therapy, hormone levels, and lipoprotein cholesterol
concentrations in elderly women
SO AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
LA English
DT Article
DE estrogen; progestin; lipoproteins; cholesterol; triglycerides; hormone
replacement therapy
ID POSTMENOPAUSAL ESTROGEN USE; APOLIPOPROTEIN-A-I; MENOPAUSAL WOMEN;
HEART-DISEASE; SUBFRACTIONS; PROGESTOGENS; LIPIDS; 1980S
AB OBJECTIVE: Our purpose was to assess the relationships of lipid and lipoprotein cholesterol levels to hormone replacement therapy and hormone levels in elderly women.
STUDY DESIGN: A sample of 292 postmenopausal women 55 to 99 years old (mean 76 years) was drawn from Leisure World Laguna Hills, California, an upper-middle-class, white independent-living population. We compared 84 women receiving unopposed estrogen replacement therapy and 38 women taking combination hormone replacement therapy with 170 women who had never used hormone replacement therapy. Nonparametric tests for differences in lipid and lipoprotein cholesterol levels among groups and multiple stepwise regression models were used.
RESULTS: Estrogen users (with and without progestin) had lower total and low-density lipoprotein cholesterol and higher high-density lipoprotein and high-density lipoprotein subfraction types 2, 2a, and 2b cholesterol levels. High-density lipoprotein type 3 subfractions were lower in combination hormone replacement therapy users but higher in unopposed estrogen users relative to nonusers. The conjugated equine estrogen dose was negatively correlated with total (p = 0.0009) and low-density lipoprotein cholesterol (p < 0.0001) levels and positively correlated to high-density lipoprotein cholesterol (p = 0.002) and its subfractions. The medroxyprogesterone acetate dose showed no consistent effect on cholesterol levels.
CONCLUSION: The associations found here reaffirm the significant role of estrogen replacement therapy on lipid and lipoprotein cholesterol levels and provide no evidence of a reduction in the beneficial effect of estrogen with the addition of a progestational agent to the replacement regimen.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DEPT MOL & NUCL MED,BERKELEY,CA.
RP PaganiniHill, A (reprint author), UNIV SO CALIF,SCH MED,DEPT PREVENT MED,1721 GRIFFIN AVE 200,LOS ANGELES,CA 90031, USA.
FU NCI NIH HHS [CA32197]; NHLBI NIH HHS [HL33577, HL18574]
NR 25
TC 21
Z9 22
U1 0
U2 0
PU MOSBY-YEAR BOOK INC
PI ST LOUIS
PA 11830 WESTLINE INDUSTRIAL DR, ST LOUIS, MO 63146-3318
SN 0002-9378
J9 AM J OBSTET GYNECOL
JI Am. J. Obstet. Gynecol.
PD MAR
PY 1996
VL 174
IS 3
BP 897
EP 902
DI 10.1016/S0002-9378(96)70322-8
PG 6
WC Obstetrics & Gynecology
SC Obstetrics & Gynecology
GA UC866
UT WOS:A1996UC86600020
PM 8633665
ER
PT J
AU Wolsky, AM
AF Wolsky, AM
TI On the bound states of a charged, nonrelativistic particle in the field
of a stationary magnetic dipole: An introduction
SO AMERICAN JOURNAL OF PHYSICS
LA English
DT Article
AB The motion of ions above the earth's atmosphere is introduced by discussing the nonrelativistic motion of a charged particle in the field of a stationary magnetic dipole. Unlike the Kepler or Coulomb problem, no way is known to separate our problem into one-dimensional problems and a fortiori an exact analytic solution is not known. However, an effective potential can be identified whose study clarifies the qualitative and semiquantitative features of the bound states. We ask about the periodicity of bound states, taken for granted by one exposed only to the Kepler or Coulomb problem, and show how consideration of phase space can provide a partial answer, Poincare recurrence. The treatment is accessible to students who have a first acquaintance with the canonical formalism and Liouville's theorem, for example first-year graduate students. (C) 1996 American Association of Physics Teachers.
RP Wolsky, AM (reprint author), ARGONNE NATL LAB,DIV ENERGY SYST,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 26
TC 0
Z9 0
U1 0
U2 0
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0002-9505
J9 AM J PHYS
JI Am. J. Phys.
PD MAR
PY 1996
VL 64
IS 3
BP 308
EP 316
DI 10.1119/1.18220
PG 9
WC Education, Scientific Disciplines; Physics, Multidisciplinary
SC Education & Educational Research; Physics
GA TW978
UT WOS:A1996TW97800023
ER
PT J
AU Wolkin, A
Sanfilipo, M
Duncan, E
Angrist, B
Wolf, AP
Cooper, TB
Brodie, JD
Laska, E
Rotrosen, JP
AF Wolkin, A
Sanfilipo, M
Duncan, E
Angrist, B
Wolf, AP
Cooper, TB
Brodie, JD
Laska, E
Rotrosen, JP
TI Blunted change in cerebral glucose utilization after haloperidol
treatment in schizophrenic patients with prominent negative symptoms
SO AMERICAN JOURNAL OF PSYCHIATRY
LA English
DT Article
ID POSITRON EMISSION TOMOGRAPHY; METABOLIC-RATE; BASAL GANGLIA; DEFICIT
SYNDROME; BLOOD-FLOW; HYPOFRONTALITY; DOPAMINE; CORTEX;
FLUORODEOXYGLUCOSE; ABNORMALITIES
AB Objective: The purpose of this report was to determine 1) the effects of chronic haloperidol treatment on cerebral metabolism in schizophrenic patients, 2) the relation between negative symptoms and haloperidol-induced regional changes in cerebral glucose utilization, and 3) the relation between metabolic change and clinical antipsychotic effect. Method: Cerebral glucose utilization, as determined by positron emission tomography (PET), was studied in 18 male schizophrenic subjects before and after chronic treatment with haloperidol at a standardized plasma level. Results: Overall, haloperidol caused a widespread decrease in absolute cerebral glucose metabolism, a relative decrease in prefrontal cortex glucose metabolism, and a relative increase in striatal metabolism. The cerebral metabolic response to haloperidol was blunted in patients with high pretreatment negative symptom scores. Conclusions: Taken together with the results from a previously reported PET study of the effects of an acute amphetamine challenge (in which 14 of the current subjects participated), these data suggest that the negative symptom complex is associated with diminished cerebral response to change in dopaminergic activity. This deficit cannot be solely accounted for by structural differences.
C1 NYU,CTR MED,NEW YORK,NY.
BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973.
NATHAN S KLINE INST PSYCHIAT RES,ORANGEBURG,NY.
RP Wolkin, A (reprint author), NEW YORK VET AFFAIRS MED CTR 116A,PSYCHIAT SERV,423 E 23RD ST,NEW YORK,NY 10010, USA.
RI Duncan, Erica/B-1671-2016
FU NIMH NIH HHS [MH-42959]; NINDS NIH HHS [NS-15638]
NR 50
TC 36
Z9 36
U1 0
U2 0
PU AMER PSYCHIATRIC ASSOCIATION
PI WASHINGTON
PA 1400 K ST NW, WASHINGTON, DC 20005
SN 0002-953X
J9 AM J PSYCHIAT
JI Am. J. Psychiat.
PD MAR
PY 1996
VL 153
IS 3
BP 346
EP 354
PG 9
WC Psychiatry
SC Psychiatry
GA TY356
UT WOS:A1996TY35600007
PM 8610821
ER
PT J
AU Schwandt, CS
Cygan, RT
Westrich, HR
AF Schwandt, CS
Cygan, RT
Westrich, HR
TI Ca self-diffusion in grossular garnet
SO AMERICAN MINERALOGIST
LA English
DT Article
ID ALUMINOSILICATE GARNETS; CATION DIFFUSIVITIES; COEFFICIENTS
AB Use of a thin-film technique and an ion microprobe make it possible to conduct cation self-diffusion experiments of Ca-44 in near end-member grossular garnet at temperatures of 800-1000 degrees C. The experiments were conducted at 1 atm and under quartz + fayalite + magnetite f(O2) conditions. The resulting activation energy (E(a) = 155 +/- 10 kJ/mol) and the frequency factor (D-0 = 7.2 x 10(-16) m(2)/s; log D-0 = -15.1 +/- 0.4) were obtained from the temperature dependence of the diffusion data. Comparison of these data with a comparable study of Mg-25 self-diffusion coefficients in pyrope confirmed that Ca diffuses more slowly through garnet than Mg under identical conditions.
C1 SANDIA NATL LABS, DEPT GEOCHEM, ALBUQUERQUE, NM 87185 USA.
NR 19
TC 51
Z9 57
U1 0
U2 1
PU MINERALOGICAL SOC AMER
PI WASHINGTON
PA 1130 17TH ST NW SUITE 330, WASHINGTON, DC 20036
SN 0003-004X
J9 AM MINERAL
JI Am. Miner.
PD MAR-APR
PY 1996
VL 81
IS 3-4
BP 448
EP 451
PG 4
WC Geochemistry & Geophysics; Mineralogy
SC Geochemistry & Geophysics; Mineralogy
GA UG199
UT WOS:A1996UG19900018
ER
PT J
AU Behm, JM
Hemminger, JC
Lykke, KR
AF Behm, JM
Hemminger, JC
Lykke, KR
TI Microscopic laser desorption postionization Fourier transform mass
spectrometry
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID NEUTRAL MOLECULES; IONIZATION
AB A microscopic laser desorption/postionization Fourier transform mass spectrometer (LD/FTMS) is described. The lateral resolution can be <1 mu m with the inherent FTMS high mass resolution intact. Laser postionization allows a certain selectivity and an increase in sensitivity. This capability should allow materials characterization in a wide variety of cases. We demonstrate microscopic desorption and postionization for atoms and molecules.
C1 ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439.
ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439.
UNIV CALIF IRVINE,INST SURFACE & INTERFACE SCI,IRVINE,CA 92717.
NR 29
TC 20
Z9 20
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD MAR 1
PY 1996
VL 68
IS 5
BP 713
EP 719
DI 10.1021/ac9510999
PG 7
WC Chemistry, Analytical
SC Chemistry
GA TX873
UT WOS:A1996TX87300007
PM 21619164
ER
PT J
AU Jacobson, SC
Ramsey, JM
AF Jacobson, SC
Ramsey, JM
TI Integrated microdevice for DNA restriction fragment analysis
SO ANALYTICAL CHEMISTRY
LA English
DT Article
ID CAPILLARY ELECTROPHORESIS; CHEMICAL-ANALYSIS; SAMPLE INJECTION; SYSTEMS;
CHIP
AB An integrated monolithic device (8 mm x 10 mm) that performs an automated biochemical procedure is demonstrated. The device mixes a DNA sample with a restriction enzyme in a 0.7-nL reaction chamber and after a digestion period injects the fragments onto a 67-mm-long capillary electrophoresis channel for sizing. Materials are precisely manipulated under computer control within the channel structure using electrokinetic trans port. Digestion of the plasmid pBR322 by the enzyme HinfI and fragment analysis are completed in 5 min using 30 amol of DNA and 2.8 x 10(-3) unit of enzyme per run.
C1 OAK RIDGE NATL LAB, DIV CHEM & ANALYT SCI, OAK RIDGE, TN 37831 USA.
NR 30
TC 279
Z9 284
U1 1
U2 12
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD MAR 1
PY 1996
VL 68
IS 5
BP 720
EP 723
DI 10.1021/ac951230c
PG 4
WC Chemistry, Analytical
SC Chemistry
GA TX873
UT WOS:A1996TX87300008
PM 21619165
ER
PT J
AU Grate, JW
Patrash, SJ
Abraham, MH
Du, CM
AF Grate, JW
Patrash, SJ
Abraham, MH
Du, CM
TI Selective vapor sorption by polymers and cavitands on acoustic wave
sensors: Is this molecular recognition?
SO ANALYTICAL CHEMISTRY
LA English
DT Letter
ID SUPRAMOLECULAR CHEMISTRY; SAW-DEVICES; QMB; MICROSENSORS
AB Selectivity patterns for the sorption of organic vapors from the gas phase into cavitand monolayers on acoustic wave sensors are very similar to those seen for sorption of the same vapors by amorphous polymers, demonstrating that the vapor/cavitand selectivity patterns are determined primarily by solubility interactions. The amorphous polymers serve as controls demonstrating that the three-dimensional structure of a cavitand layer is not primarily responsible for the selectivity observed. Binding and selectivity in the examples cited are governed primarily by general dispersion interactions and not by specific oriented interactions that could lead to molecular recognition.
C1 UCL, DEPT CHEM, LONDON WC1H 0AJ, ENGLAND.
RP Grate, JW (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, POB 999, RICHLAND, WA 99352 USA.
NR 27
TC 91
Z9 93
U1 0
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0003-2700
J9 ANAL CHEM
JI Anal. Chem.
PD MAR 1
PY 1996
VL 68
IS 5
BP 913
EP 917
DI 10.1021/ac950518z
PG 5
WC Chemistry, Analytical
SC Chemistry
GA TX873
UT WOS:A1996TX87300038
PM 21619189
ER
PT J
AU Takano, K
Latour, LL
Formato, JE
Carano, RAD
Helmer, KG
Hasegawa, Y
Sotak, CH
Fisher, M
AF Takano, K
Latour, LL
Formato, JE
Carano, RAD
Helmer, KG
Hasegawa, Y
Sotak, CH
Fisher, M
TI The role of spreading depression in focal ischemia evaluated by
diffusion mapping
SO ANNALS OF NEUROLOGY
LA English
DT Article
ID CEREBRAL-ISCHEMIA; T2-WEIGHTED MRI; BRAIN ISCHEMIA; MIGRAINE; RAT;
MECHANISM; MK-801; CORTEX; INJURY; STROKE
AB This study investigated the role of spontaneous and induced spreading depression (SD) on the evolution of focal ischemia in vivo. We induced focal ischemia in 12 rats using the middle cerebral artery suture occlusion (MCAO) method. Chemical stimulation of nonischemic ipsilateral cortex by potassium chloride application (KCI group; n = 7) and saline (NaCl group; n = 5) was performed at 15, 30, 45, and 60 minutes following MCAO, and SD was detected electrophysiologically. Ischemic lesion volumes assessed over 15-minute intervals, evaluated by continuous apparent diffusion coefficient (ADC) of water mapping, demonstrated that the ischemic region increased significantly during 15-minute time epochs with a single SD episode (36.5 +/- 12.9 mm(3), mean +/- SD) or multiple SD episodes (39.8 +/- 22.3) compared with those without SD (13.9 +/- 11.5) (p = 0.0009). Infarct volume at postmortem 24 hours after MCAO was significantly larger in the KCI group, with more total SDs (237.8 +/- 13.8) than the NaCl group (190.5 +/- 12.6) (p = 0.0001). This study demonstrates that ischemia-related and induced SDs increase significantly ischemic lesion volume in vivo, supporting the hypothesis for a causative role of SD in extending focal ischemic injury.
C1 UNIV MASSACHUSETTS,SCH MED,DEPT NEUROL,WORCESTER,MA.
UNIV MASSACHUSETTS,SCH MED,DEPT RADIOL,WORCESTER,MA.
WORCESTER POLYTECH INST,DEPT BIOMED ENGN,WORCESTER,MA 01609.
BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973.
RP Takano, K (reprint author), MEM HOSP,MED CTR,DEPT NEUROL,119 BELMONT ST,WORCESTER,MA 01605, USA.
NR 41
TC 176
Z9 178
U1 0
U2 3
PU LITTLE BROWN CO
PI BOSTON
PA 34 BEACON STREET, BOSTON, MA 02108-1493
SN 0364-5134
J9 ANN NEUROL
JI Ann. Neurol.
PD MAR
PY 1996
VL 39
IS 3
BP 308
EP 318
DI 10.1002/ana.410390307
PG 11
WC Clinical Neurology; Neurosciences
SC Neurosciences & Neurology
GA UC473
UT WOS:A1996UC47300006
PM 8602749
ER
PT J
AU Shenton, LR
Bowman, KO
AF Shenton, LR
Bowman, KO
TI Moment solution to an urn model
SO ANNALS OF THE INSTITUTE OF STATISTICAL MATHEMATICS
LA English
DT Article
DE Bernard's urn; beta integral transforms; finite difference calculus;
generating function; hypergeometric distributions; hypergeometric
functions; moments; replenishment-depletion urn
AB A subset of Bernard's RD-model (replenishment-depletion) is considered from the viewpoint of the calculus of finite differences. The most general case is considered and includes an urn with balls of many colors, each color being replenished either deterministically or stochastically. Factorial moment generating functions (fmgfs) are employed to define probability generating functions. A new result is given for the two color case defining the fmgf and probability generating function (with probabilities) when the replenishments are positive valued random variables with given factorial moments. This result involves beta integral transforms defining a manifold of discrete distributions. Particular cases relate to hypergeometric discrete distributions.
C1 OAK RIDGE NATL LAB,DIV MATH & COMP SCI,OAK RIDGE,TN 37831.
RP Shenton, LR (reprint author), UNIV GEORGIA,DEPT STAT,ATHENS,GA 30602, USA.
NR 10
TC 1
Z9 1
U1 0
U2 0
PU KLUWER ACADEMIC PUBL
PI DORDRECHT
PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 0020-3157
J9 ANN I STAT MATH
JI Ann. Inst. Stat. Math.
PD MAR
PY 1996
VL 48
IS 1
BP 169
EP 184
DI 10.1007/BF00049297
PG 16
WC Statistics & Probability
SC Mathematics
GA UD405
UT WOS:A1996UD40500013
ER
PT J
AU Pinkart, HC
Wolfram, JW
Rogers, R
White, DC
AF Pinkart, HC
Wolfram, JW
Rogers, R
White, DC
TI Cell envelope changes in solvent-tolerant and solvent-sensitive
Pseudomonas putida strains following exposure to o-xylene
SO APPLIED AND ENVIRONMENTAL MICROBIOLOGY
LA English
DT Article
ID FATTY-ACIDS; OUTER-MEMBRANE; DOUBLE-BOND; AERUGINOSA;
LIPOPOLYSACCHARIDES; BACTERIUM; TOLUENE; TRANS
AB Solvent-tolerant and -sensitive Pseudomonas putida strains were studied to determine their cell envelope changes following exposure to o-xylene. Both strains produced trans-unsaturated fatty acids. The tolerant strain showed an increase in total fatty acids, an increase in saturated fatty acids, and modified lipopolysaccharide. It is suggested that these envelope modifications aid in survival at high concentrations of organic solvents.
C1 UNIV TENNESSEE,DEPT MICROBIOL,KNOXVILLE,TN 37996.
OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831.
IDAHO NATL ENGN LAB,BIOTECHNOL UNIT,IDAHO FALLS,ID 83415.
RP Pinkart, HC (reprint author), UNIV TENNESSEE,CTR ENVIRONM BIOTECHNOL,10515 RES DR,SUITE 300,KNOXVILLE,TN 37932, USA.
NR 29
TC 108
Z9 113
U1 1
U2 4
PU AMER SOC MICROBIOLOGY
PI WASHINGTON
PA 1325 MASSACHUSETTS AVENUE, NW, WASHINGTON, DC 20005-4171
SN 0099-2240
J9 APPL ENVIRON MICROB
JI Appl. Environ. Microbiol.
PD MAR
PY 1996
VL 62
IS 3
BP 1129
EP 1132
PG 4
WC Biotechnology & Applied Microbiology; Microbiology
SC Biotechnology & Applied Microbiology; Microbiology
GA TY365
UT WOS:A1996TY36500066
PM 16535264
ER
PT J
AU Bradford, M
Riley, C
AF Bradford, M
Riley, C
TI Session 1 - Thermal, chemical, and biological processing
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Editorial Material
C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO.
RP Bradford, M (reprint author), AE STALEY,DECATUR,IL, USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 1
EP 1
DI 10.1007/BF02941682
PG 1
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700002
ER
PT J
AU Hsu, TA
Himmel, M
Schell, D
Farmer, J
Berggren, M
AF Hsu, TA
Himmel, M
Schell, D
Farmer, J
Berggren, M
TI Design and initial operation of a high-solids, pilot-scale reactor for
dilute-acid pretreatment of lignocellulosic biomass
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE dilute sulfuric acid pretreatment; high-solids reactor; pilot-scale
reactor; ethanol from biomass; prehydrolysis
ID ENZYMATIC-HYDROLYSIS
AB A recently installed 100-L horizontal shaft custom-fabricated mixer/reactor, made of Carpenter 20 Cb-3 stainless steel and designed for high-solids, dilute-acid pretreatment of lignocellulosic biomass, is described. Several preliminary runs with a hardwood and a herbaceous feedstock are reported; the results show the operation to be reliable with good reproducibility. No significant differences between comparable pretreatments in the high-solids reactor and a 1-L laboratory-scale reactor are apparent. Pretreatment efficiency is not affected by 10-15% (w/w) solids loading or biomass particle size of up to -10 mm. Mass balances are closed reasonably well, with improvement in reactor contents handling and biomass analytical methods desirable.
C1 HAZEN RES INC,GOLDEN,CO.
RP Hsu, TA (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,GOLDEN,CO 80401, USA.
NR 32
TC 11
Z9 12
U1 0
U2 6
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 3
EP 18
DI 10.1007/BF02941683
PG 16
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700003
ER
PT J
AU Torget, R
Hatzis, C
Hayward, TK
Hsu, TA
Philippidis, GP
AF Torget, R
Hatzis, C
Hayward, TK
Hsu, TA
Philippidis, GP
TI Optimization of reverse-flow, two-temperature, dilute-acid pretreatment
to enhance biomass conversion to ethanol
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE counterconcurrent pretreatment; dilute-acid pretreatment; ethanol; xylan
kinetics; percolation reactor
ID HYDROLYSIS; XYLAN; SACCHARIFICATION; PREHYDROLYSIS; HEMICELLULOSE;
CELLULOSE; WATER
AB A reverse-flow, two-temperature dilute-acid prehydrolysis process of commercial yellow poplar sawdust using two percolation reactors was designed to simulate countercurrent flow of the biomass solids and prehydrolysis liquor, and to exploit the xylan biphasic kinetics. Lower temperatures (150-174 degrees C) are initially applied to hydrolyze the easily hydrolyzable xylan, and higher temperatures (180-204 degrees C) are applied to hydrolyze the remaining xylan. Two reactors were used to optimize each temperature range, using Varying concentrations of sulfuric acid from 0.073-0.73 wt% and reaction times. Yields of soluble xylose, as high as 97% of theoretical, expressed as monomeric and oligomeric xylose, have been achieved with only 2.9% of the xylan being degraded to furfural, at concentrations of total potential sugar between 2.4 and 3.7 wt% before flashing. Depending on the combined severity of the acid concentration, residence time of the solids and liquor, and temperature of prehydrolysis, 81-100% of the hemicellulose, 3-32% of the glucans, and up to 46% of the Klason lignin could be solubilized. The lignocellulosic substrate produced from the pretreatment is readily converted to ethanol at a yield of approx 91% of theoretical, with ethanol concentrations of up to 4.0 wt% in 55 h via a simultaneous saccharification and fermentation (SSF) process. In terms of xylose recovery and ethanol production level and rate, the present results are far superior to those previously reported using a single-temperature, dilute-acid pretreatment.
RP Torget, R (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,GOLDEN,CO 80401, USA.
RI Hatzis, Christos/M-3867-2015
OI Hatzis, Christos/0000-0002-8120-2290
NR 42
TC 47
Z9 49
U1 1
U2 7
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 85
EP 101
DI 10.1007/BF02941691
PG 17
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700011
ER
PT J
AU Chen, RF
Lee, YY
Torget, R
AF Chen, RF
Lee, YY
Torget, R
TI Kinetic and modeling investigation on two-stage reverse-flow reactor as
applied to dilute-acid pretreatment of agricultural residues
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE dilute-acid pretreatment; kinetics, modeling; percolation; corn
cobs/stover mixture
ID PERCOLATION PROCESS; HEMICELLULOSE; HYDROLYSIS
AB The kinetics of dilute-acid pretreatment/hydrolysis of the hemicellulose in a mixture of corn cobs and corn stover was investigated. The kinetic data confirmed that the hemicellulose in this feedstock is of a biphasic nature. The kinetic model recognizes the presence of soluble xylose oligomers, xylose monomer, and the decomposition of xylose. The kinetic parameters were determined over the conditions of 120-150 degrees C, and sulfuric acid concentration of 0.44-1.90%.
The biphasic nature of the kinetics brings about an additional flexibility in the reactor design and the operation strategy, since different reaction conditions can be applied to each of the two different fractions of hemicellulose in the feedstock. With incorporation of the kinetic data, a percolation reactor operated under various modes, uniform temperature, temperature step change (along with or without flow rate step change), and two-stage reverse-flow operation, was modeled and investigated for its performance. The modeling results affirmed that a step-change/reverse-flow operation is advantageous for biphasic substrates, including agricultural residues. The optimum temperature difference in the step-change operation was determined to be 30 degrees C over a wide range of reaction temperature. Temperature step change alone (without use of reverse-flow mode) increased the product yield by 3-11% (depending on the reaction conditions) over that of uniform temperature operation. The most significant improvement, however, was seen with application of a two-stage reverse-flow reactor arrangement with temperature step change employing different conditions at each stage. This operation essentially doubled the sugar concentration over that of the temperature step change operation.
C1 AUBURN UNIV,DEPT CHEM ENGN,AUBURN,AL 36849.
NATL RENEWABLE ENERGY LAB,GOLDEN,CO.
NR 11
TC 35
Z9 35
U1 0
U2 10
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 133
EP 146
DI 10.1007/BF02941694
PG 14
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700014
ER
PT J
AU Rivard, CJ
Engel, RE
Hayward, TK
Nagle, NJ
Hatzis, C
Philippidis, GP
AF Rivard, CJ
Engel, RE
Hayward, TK
Nagle, NJ
Hatzis, C
Philippidis, GP
TI Measurement of the inhibitory potential and detoxification of biomass
pretreatment hydrolysate for ethanol production
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE microtox; toxicity assay; ethanol fermentation; dilute-acid hydrolysis;
detoxification
AB The Microtox assay represents a rapid, accurate, and reproducible method for determining general microbial toxicity. This assay was used to evaluate the relative toxicity of a variety of hydrolysate samples derived from dilute-acid and alkaline biomass pretreatment. Toxicity is elicited from biomass degradation products, such as furfural, hydroxymethyl furfural, and acetic acid, generated during pretreatment. Microtox results indicate that the pretreatment samples examined ranged from 9 to 71 toxicity units (TU). Correlations of TU and sample absorbance at several wavelengths were evaluated for all sample series. Sample TU values best agreed with absorbance at 230 nn, but the unsatisfactory fit suggests that absorbance should not be used as an absolute measure of sample toxicity.
Microtox data for pretreatment hydrolysate samples were correlated with the inhibition experienced by the ethanologenic yeast, Saccharomyces cerevisiae strain D(5)A, during the simultaneous saccharification and fermentation (SSF) process of pretreated biomass. None of the alkaline pretreatment conditions produced inhibition during SSF (data not shown). However, the acid pretreatment conditions did produce a wide range of inhibitory and noninhibitory hydrolysates. In general, fermentation was inhibited for acid-pretreated hydrolysate samples with values exceeding 45 TU. Preliminary studies that focused on reducing hydrolysate sample toxicity (detoxification) indicate that adding perlite and zeolite had little effect. However, the use of charcoal, a universal flocculent, or ion-exchange resins significantly reduced sample toxicity, holding promise for the efficient bioconversion of pretreated biomass to ethanol. Moreover, the developed toxicity measurement assay can quickly monitor the quality of the pretreatment process. In this way, biomass conversion operation processes can be reliably controlled at the pilot and commercial scales.
C1 NATL RENEWABLE ENERGY LAB,BIOPROC BRANCH,GOLDEN,CO.
RP Rivard, CJ (reprint author), NATL RENEWABLE ENERGY LAB,APPL BIOL SCI BRANCH,GOLDEN,CO, USA.
RI Hatzis, Christos/M-3867-2015
OI Hatzis, Christos/0000-0002-8120-2290
NR 4
TC 22
Z9 22
U1 0
U2 4
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 183
EP 191
DI 10.1007/BF02941698
PG 9
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700018
ER
PT J
AU Carlson, T
Apel, WA
AF Carlson, T
Apel, WA
TI Applied biological research
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Editorial Material
C1 IDAHO NATL LAB,IDAHO FALLS,ID.
RP Carlson, T (reprint author), CARGILL INC,DAYTON,OH, USA.
NR 0
TC 0
Z9 0
U1 1
U2 1
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 193
EP 193
DI 10.1007/BF02941699
PG 1
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700019
ER
PT J
AU Dunahay, TG
Jarvis, EE
Dais, SS
Roessler, PG
AF Dunahay, TG
Jarvis, EE
Dais, SS
Roessler, PG
TI Manipulation of microalgal lipid production using genetic engineering
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE biodiesel; diatoms; genetic transformation; lipid synthesis; microalgae
ID CYCLOTELLA-CRYPTICA; FIREFLY LUCIFERASE; TRANSFORMATION; EXPRESSION;
TRANSIENT; COENZYME
AB Genetic transformation of two species of diatoms has been accomplished by introducing chimeric plasmid vectors containing a bacterial antibiotic resistance gene driven by regulatory sequences from the acetyl-CoA carboxylase (ACCase) gene from the diatom Cyclotella cryptica. The recombinant DNA integrated into one or more random sites within the algal genome and the foreign protein was produced by the algal transformants. This is the first report of genetic transformation of any chlorophyll c-containing microalgal strain. We are using this system to introduce additional copies of the ACCase gene into diatoms in an attempt to manipulate lipid accumulation in transformed strains.
RP Dunahay, TG (reprint author), NATL RENEWABLE ENERGY LAB,APPL BIOL SCI BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA.
NR 20
TC 125
Z9 133
U1 10
U2 89
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 223
EP 231
DI 10.1007/BF02941703
PG 9
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700023
ER
PT J
AU Polman, JK
Rae, C
DelezeneBriggs, KM
AF Polman, JK
Rae, C
DelezeneBriggs, KM
TI Coal-induced enhancement of ethanol and biomass production
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE ethanol; coal; chelator; Saccharomyces; Zygosaccharomyces
ID MOLECULAR-STRUCTURE
AB Inclusion of coal in Saccharomyces cerevisiae cultures enhanced ethanol and biomass production (from dextrose) similarly to yeast extract. Coal-induced enhancement was slower in comparison to yeast extract. Ethanol/biomass ratios were twice as high for coal-induced enhancement. Humic acid also enhanced ethanol and biomass production. Coal supplied nitrogen, phosphorus, magnesium, and zinc to cells. Coal facilitated the utilization of cobalt, and reduced the toxicity of aluminum and manganese. Coal-induced enhancement may be a chelation effect; ethylenediaminetetraacetic acid mimicked coal enhancement. Coal also enhanced ethanol and biomass production by Zygosaccharomyces rouxii.
RP Polman, JK (reprint author), LOCKHEED IDAHO TECHNOL CO,IDAHO NATL ENGN LAB,IDAHO FALLS,ID 83415, USA.
NR 19
TC 0
Z9 0
U1 0
U2 0
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 327
EP 338
DI 10.1007/BF02941711
PG 12
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700031
ER
PT J
AU Laymon, RA
Adney, WS
Mohagheghi, A
Himmel, ME
Thomas, SR
AF Laymon, RA
Adney, WS
Mohagheghi, A
Himmel, ME
Thomas, SR
TI Cloning and expression of full-length Trichoderma reesei
cellobiohydrolase I cDNAs in Escherichia coli
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE cellobiohydrolase I (CBHI); T-reesei; cellulases; fusion proteins
ID SACCHAROMYCES-CEREVISIAE; CELLULASES; STRAIN-L27; SYNERGISM
AB The process of converting lignocellulosic biomass to ethanol via fermentation depends on developing economic sources of cellulases. Trichoderma reesei cellobiohydrolase (CBH) I is a key enzyme in the fungal cellulase system; however, specific process application requirements make modification of the enzyme by site-directed mutagenesis (SDM) an attractive goal. To undertake SDM investigations, an efficient, cellulase-free host is required. To test the potential of Escherichia coli as a host, T. reesei CBH I cDNA was expressed in E. coli strain GI724 as a C-terminal fusion to thermostable thioredoxin protein; Full-length expression of CBH I was subsequently verified by molecular weight, Western blot analysis, and activity on soluble substrates.
C1 NATL RENEWABLE ENERGY LAB, ALTERNAT FUELS DIV, APPL BIOL SCI BRANCH, GOLDEN, CO 80401 USA.
NR 22
TC 29
Z9 31
U1 0
U2 3
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA
SN 0273-2289
EI 1559-0291
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 389
EP 397
DI 10.1007/BF02941718
PG 9
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700038
PM 8669906
ER
PT J
AU Philippidis, GP
Ollis, DF
AF Philippidis, GP
Ollis, DF
TI Bioprocessing research
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Editorial Material
C1 N CAROLINA STATE UNIV,RALEIGH,NC 27695.
RP Philippidis, GP (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO, USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 431
EP 431
DI 10.1007/BF02941723
PG 1
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700043
PM 8669910
ER
PT J
AU Hatzis, C
Riley, C
Philippidis, GP
AF Hatzis, C
Riley, C
Philippidis, GP
TI Detailed material balance and ethanol yield calculations for the
biomass-to-ethanol conversion process
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE carbon balance; dilute-acid pretreatment; simultaneous saccharification
and fermentation; enzymatic conversion; overall yield
AB Applying material balance calculations to the evaluation and optimization of lignocellulosic biomass conversion processes is fundamentally important. The lack of a general framework for material balance calculations and inconsistent compositional analysis data have made it difficult to compare results from different research groups. Material balance templates have been developed to follow accurately the distribution of carbon in lignocellulosic substrates through the pretreatment and simultaneous saccharification and fermentation (SSF) processes, and provide information on overall carbon recovery, recovery of individual sugars, and solubilization of biomass components. Based on material balance considerations, we developed equations that allow us to compute overall ethanol yields for biochemical conversion of biomass correctly.
C1 NATL RENEWABLE ENERGY LAB, ALTERNAT FUELS DIV, ANAL & PROJECT MANAGEMENT BRANCH, GOLDEN, CO 80401 USA.
RP Hatzis, C (reprint author), NATL RENEWABLE ENERGY LAB, BIOPROC DEV BRANCH, 1617 COLE BLVD, GOLDEN, CO 80401 USA.
RI Hatzis, Christos/M-3867-2015
OI Hatzis, Christos/0000-0002-8120-2290
NR 27
TC 20
Z9 20
U1 1
U2 10
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512 USA
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 443
EP 459
DI 10.1007/BF02941725
PG 17
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700045
ER
PT J
AU Kaufman, EN
Cooper, SP
Budner, MK
Richardson, GR
AF Kaufman, EN
Cooper, SP
Budner, MK
Richardson, GR
TI Continuous and simultaneous fermentation and recovery of lactic acid in
a biparticle fluidized-bed bioreactor
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE lactic acid fermentation; resin; adsorbent; biparticle fluidized bed;
continuous
ID IMMOBILIZED CELLS; KINETIC-MODEL; BIOCONVERSION; RECYCLE; REACTOR;
SYSTEMS
AB A continuous biparticle fluidized-bed reactor (BFBR) is developed for the simultaneous fermentation and recovery of lactic acid. In this processing scheme, bacteria are immobilized in gelatin beads and are fluidized in a columnar reactor. Solid particles (weak-base resin IRA-35) with sorbent capacity for the product are introduced at the top of the reactor and fall countercurrently to the biocatalyst, effecting in situ removal of the inhibitory lactic acid while also controlling reactor pH at optimal levels. One-week-long fermentation trials using immobilized Lactobacillus delbreuckii with sorbent addition demonstrated a volumetric productivity (6.9 g/L . h) at least 16-fold higher than that of a free-cell batch fermentation with base pH control and identical biomass concentration and medium composition. Regeneration of the loaded sorbent from the BFBR has effected a 35-fold concentration of lactic acid compared with original levels in the fermentation broth (70 vs 2 g/L). Lactic acid concentrations as high as 610 g/L have been observed when the loading solution contained 50 g/L lactic acid. Rich medium formulations did not seem to increase BFBR performance. The benefits of this reactor system, as opposed to conventional batch fermentation, are discussed in terms of productivity and process economics.
RP Kaufman, EN (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,BIOPROC RES & DEV CTR,OAK RIDGE,TN 37831, USA.
NR 40
TC 16
Z9 16
U1 0
U2 3
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 503
EP 515
DI 10.1007/BF02941730
PG 13
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700050
ER
PT J
AU Tsouris, C
Lizama, HM
Spurrier, MA
Takeuchi, TL
Scott, TC
AF Tsouris, C
Lizama, HM
Spurrier, MA
Takeuchi, TL
Scott, TC
TI Hydrodynamics of bioreactor systems for liquid-liquid contacting
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE sulfate-reducing bacteria; electrostatic dispersion; electrostatic
spraying; liquid contactor
ID FLOW
AB Two liquid-liquid bioreactors, a stirred-tank and a novel electrostatic-dispersion system, are being used to investigate biodesulfurization of oil by sulfate-reducing bacteria (SRB). The hydrodynamic behavior of both bioreactors under various operating conditions is discussed in this article. The total liquid volume of the stirred-tank system is 1 L in a 1.5-L cylindrical tank equipped with two baffles and two Rushton-type six-blade impellers. The steady-state average drop size (d(32)) was determined by a video technique, and correlated with operating conditions, physical properties, and system geometry. Although the stirred-tank geometry was not standard, the d(32) correlation was found to be in good agreement with correlations reported in the literature. For the electrostatic dispersion system, a 0.25-L column was used with kerosene as the continuous phase and water containing SRB as the dispersed phase. Microdroplets were obtained by the break-up of the aqueous phase meniscus at the tip of a capillary tube using pulsed direct current (dc) electric fields. The size of the drops ejected from the capillary was measured as a function of the intensity of the applied voltage. Preliminary results showed no deleterious effect of electrospray dispersion on bacteria viability.
RP Tsouris, C (reprint author), OAK RIDGE NATL LAB,POB 2008,OAK RIDGE,TN 37831, USA.
RI Unciano, Noel/B-6810-2009; Tsouris, Costas/C-2544-2016
OI Tsouris, Costas/0000-0002-0522-1027
NR 10
TC 14
Z9 14
U1 0
U2 2
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 581
EP 592
DI 10.1007/BF02941738
PG 12
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700058
ER
PT J
AU Nghiem, NP
Davison, BH
Thompson, JE
Suttle, BE
Richardson, GR
AF Nghiem, NP
Davison, BH
Thompson, JE
Suttle, BE
Richardson, GR
TI The effect of biotin on the production of succinic acid by
Anaerobiospirillum succiniciproducens
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE succinic acid; fermentation; Anaerobiospirillum succiniciproducens;
biotin
RP Nghiem, NP (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,MS-6226,OAK RIDGE,TN 37831, USA.
RI Davison, Brian/D-7617-2013
OI Davison, Brian/0000-0002-7408-3609
NR 7
TC 14
Z9 14
U1 1
U2 5
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 633
EP 638
DI 10.1007/BF02941744
PG 6
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700064
ER
PT J
AU Webb, OF
Davison, BH
Scott, TC
AF Webb, OF
Davison, BH
Scott, TC
TI Modeling scale-up effects on a small pilot-scale fluidized-bed reactor
for fuel ethanol production
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE ethanol; dextrose; fermentation; fluidized-bed reactor; modeling
ID ZYMOMONAS-MOBILIS; BIOREACTOR; DISPERSION; BEADS
RP Webb, OF (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,POB 2008,MS-6226,OAK RIDGE,TN 37831, USA.
RI Davison, Brian/D-7617-2013
OI Davison, Brian/0000-0002-7408-3609
NR 17
TC 4
Z9 4
U1 0
U2 1
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 639
EP 647
DI 10.1007/BF02941745
PG 9
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700065
ER
PT J
AU Combs, N
Hatzis, C
AF Combs, N
Hatzis, C
TI Development of an epi-fluorescence assay for monitoring yeast viability
and pretreatment hydrolysate toxicity in the presence of lignocellulosic
solids
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE viability; fluorescence staining; Saccharomyces cerevisiae; hydrolysate
toxicity
RP Combs, N (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,BIOPROC DEV BRANCH,1617 COLE BLVD,GOLDEN,CO 80401, USA.
RI Hatzis, Christos/M-3867-2015
OI Hatzis, Christos/0000-0002-8120-2290
NR 17
TC 3
Z9 3
U1 0
U2 0
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 649
EP 657
DI 10.1007/BF02941746
PG 9
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700066
PM 8669916
ER
PT J
AU Lin, MS
Premuzic, ET
Yablon, JH
Zhou, WM
AF Lin, MS
Premuzic, ET
Yablon, JH
Zhou, WM
TI Biochemical processing of heavy oils and residuum
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE biotechnology; petroleum; sulfur; nitrogen; metal
C1 BROOKHAVEN NATL LAB,DEPT APPL SCI,BIOSYST & PROC SCI DIV,UPTON,NY 11973.
NR 6
TC 12
Z9 12
U1 0
U2 1
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 659
EP 664
DI 10.1007/BF02941747
PG 6
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700067
ER
PT J
AU Mielenz, JR
Koepping, D
Parson, F
AF Mielenz, JR
Koepping, D
Parson, F
TI Commercialization of biomass ethanol technology - Feasibility studies
for biomass-to-ethanol production facilities
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE biomass; ethanol; production facilities
AB With the recent commissioning of the National Renewable Energy Laboratory's (NREL) process development unit, through the support of the US Department of Energy (DOE) Biofuels Program, the technology to convert lignocellulosic biomass to fuel ethanol enzymatically has reached the pilot scale. The next step will be to construct precommercial-scale engineering demonstration units, which will probably be built at or near proposed commercial plant sites, to demonstrate this technology at selected biomass-rich locations in the US. Proper site selection can be critical to these units' long-term profitability, so DOE and NREL have begun a program to help industrial partners build sound business plans that include detailed siting studies. These studies examine biomass availability and cost projections, delineate site requirements, identify qualifying sites, examine environmental and community impacts, and provide detailed pro forma financial evaluations and projections. The DOE/NREL ethanol project currently supports several plans that help industry identify economically viable commercial opportunities for biomass ethanol.
RP Mielenz, JR (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,GOLDEN,CO 80401, USA.
NR 7
TC 4
Z9 4
U1 0
U2 3
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 667
EP 676
DI 10.1007/BF02941749
PG 10
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700069
ER
PT J
AU Lynd, LR
Elander, RT
Wyman, CE
AF Lynd, LR
Elander, RT
Wyman, CE
TI Likely features and costs of mature biomass ethanol technology
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE ethanol; biomass; energy; mature technology; economics
ID CLOSTRIDIUM-THERMOCELLUM; SACCHARIFICATION; FERMENTATION
AB Analysis is undertaken motivated by the question: ''What are the likely features and cost of a facility producing ethanol from cellulosic biomass at a level of maturity comparable to a refinery?'' This question is considered with respect to cost reductions arising from increased scale, lower-cost feedstock, and process improvements in pretreatment and biological conversion, but not other process steps. An ''advanced technology'' scenario is developed that represents our estimate of the most likely features of mature biomass ethanol technology. A ''best-parameter'' scenario, intended to be indicative of the potential for R&D-driven cost reductions, is also developed based on the best values for individual process parameters reported in the literature. Both scenarios involve large plants (2.7 million dry t feedstock/yr). Feedstock costs are taken to be $38.60/delivered dry t for the advanced scenario and $34.00/delivered dry t for the best-parameter scenario. Projected selling prices, including operating costs and capital recovery corresponding to a 14.2% return on investment, are 50 cent/gal (pure ethanol basis) for the advanced technology case and 34 cent/gal for the best-parameter case. These are markedly lower than the 118 cent/gal selling price projected for base-case technology, with the largest share of cost reductions due to improved conversion technology. Key conversion technology improvements include, in order of importance, consolidated bioprocessing, advanced pretreatment, elimination of seed reactors, and faster rates. First-law thermodynamic efficiencies based on the biomass high heating value and production of ethanol and electricity are 61.2% for the advanced case and 69.3% for the best-parameter case, as compared to 50.3% currently. Combining advanced ethanol production technology of the type presented here with advanced gas turbine-based power generation is a promising direction for future analysis and may offer still further cost reductions and efficiency increases.
C1 INDEPENDENCE BIOFUEL INC,MERIDEN,NH.
NATL RENEWABLE ENERGY LAB,GOLDEN,CO.
RP Lynd, LR (reprint author), DARTMOUTH COLL,THAYER SCH ENGN,HANOVER,NH 03755, USA.
RI Lynd, Lee/N-1260-2013
OI Lynd, Lee/0000-0002-5642-668X
NR 23
TC 184
Z9 190
U1 3
U2 24
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 741
EP 761
DI 10.1007/BF02941755
PG 21
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700075
ER
PT J
AU Sublette, K
Klasson, KT
AF Sublette, K
Klasson, KT
TI Environmental biotechnology
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Editorial Material
C1 OAK RIDGE NATL LAB,OAK RIDGE,TN.
RP Sublette, K (reprint author), UNIV TULSA,TULSA,OK 74104, USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 777
EP 777
DI 10.1007/BF02941757
PG 1
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700077
ER
PT J
AU Chapatwala, KD
Bau, GRV
Vijaya, OK
Armstead, E
Palumbo, AV
Zhang, C
Phelps, TJ
AF Chapatwala, KD
Bau, GRV
Vijaya, OK
Armstead, E
Palumbo, AV
Zhang, C
Phelps, TJ
TI Effect of temperature and yeast extract on microbial respiration of
sediments from a shallow coastal subsurface and vadose zone
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE subsurface sediments; respiration; carbon dioxide (CO2); yeast extract;
micro-oxymax respirometer; wafer; production
ID BACTERIA; SOILS
AB As a part of our study on microbial heterogeneity in subsurface environments, we have examined the microbial respiration of sediment samples obtained from a coastal site near Oyster, VA. The sediments at the site are unconsolidated, fine to coarse beach sand and gravel. A Columbus Instruments Micro-Oxymax Respirometer was used to measure the rate of carbon dioxide (CO2) production during the respiration of the sediment samples. The rate of respiration of the Sediment samples ranged from 0.035-0.6 mu L CO2/h/g of the sediment. The sediment samples showing maximum (0.6 mu L CO2/h/g) and minimum (0.035 mu L CO2/h/g) production of CO2 were selected to study the effect of micronutrient-yeast extract (0.5 and 1.0 mu g/g of the sediment) and water (0.5 and 1.0 mL) on the rate of CO2 production. The rate of CO2 production increased with the addition of water, but increased approx 2 orders of magnitude (from 0.26 to an average of 23.5 mu L CO2/h/g) when 1.0 g/g yeast extract was added to the sediment samples. In these coastal sediments, temperature, depth, and addition of water influenced microbial activity, but the addition of 1.0 mu g/g yeast extract as a micronutrient rapidly increased the rate of CO2 production 2 orders of magnitude.
C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831.
RP Chapatwala, KD (reprint author), SELMA UNIV,DIV NAT SCI,SELMA,AL 36701, USA.
RI Palumbo, Anthony/A-4764-2011; phelps, tommy/A-5244-2011
OI Palumbo, Anthony/0000-0002-1102-3975;
NR 15
TC 3
Z9 3
U1 0
U2 3
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 827
EP 835
DI 10.1007/BF02941762
PG 9
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700082
PM 8669920
ER
PT J
AU Evans, BS
Dudley, CA
Klasson, KT
AF Evans, BS
Dudley, CA
Klasson, KT
TI Sequential anaerobic-aerobic biodegradation of PCBs in soil slurry
microcosms
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE PCB; anaerobic-aerobic biodegradation; soil slurry microcosms;
bioremediation
ID HUDSON RIVER SEDIMENTS; POLYCHLORINATED-BIPHENYLS; DECHLORINATION;
MICROORGANISMS; BACTERIA; AROCLORS
AB Many industrial locations have identified the need for treatment of polychlorinated biphenyl (PCB) wastes and remediation of PCB-contaminated sites. Biodegradation of PCBs is a potentially effective technology for treatment of PCB-contaminated soils and sludges; however, a practicable remediation technology has not yet been demonstrated. In laboratory experiments, soil slurry microcosms inoculated with microorganisms extracted from PCB-contaminated Hudson River sediments have been used for anaerobic dechlorination of weathered Aroclor 1248 in contaminated soil with a low organic carbon content. Anaerobic incubation was then followed by exposure to air, addition of biphenyl, and inoculation with Pseudomonas sp. LB400, an aerobic PCB degrader. The sequential anaerobic-aerobic treatment constituted an improvement compared to anaerobic or aerobic treatment alone by reducing the total amount of PCBs remaining and decreasing the tendency for end products to accumulate in humans. A 70% reduction of PCBs was observed during sequential treatment with products containing fewer chlorines and having a shorter half-life in humans than the original PCBs. The aerobic treatment alone was also quite effective as a stand-alone treatment reducing the PCBs by 67%. The results represent a case in which anaerobic river sediment organisms have been successfully transferred to a matrix free of river or lake sediments.
C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831.
OI Klasson, K. Thomas/0000-0003-3358-3081
NR 29
TC 35
Z9 42
U1 4
U2 16
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 885
EP 894
DI 10.1007/BF02941769
PG 10
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700089
PM 8669923
ER
PT J
AU Palumbo, AV
Zhang, CL
Liu, S
Scarborough, SP
Pfiffner, SM
Phelps, TJ
AF Palumbo, AV
Zhang, CL
Liu, S
Scarborough, SP
Pfiffner, SM
Phelps, TJ
TI Influence of media on measurement of bacterial populations in the
subsurface - Numbers and diversity
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE diversity; CFU; bioremediation; media, subsurface; microbiology; fungi
ID RIBOSOMAL-RNA SEQUENCES; MICROBIAL COMMUNITIES; PHYSIOLOGICAL DIVERSITY;
COASTAL-PLAIN; SEDIMENTS; OKLAHOMA; ATLANTIC; SITE
AB To examine the factors contributing to microbial heterogeneity, the US Department of Energy Subsurface Science Program has initiated research at a Coastal Plain site near Oyster, VA. Sediments at the site are composed of unconsolidated, fine to coarse beach sands and gravel. The influence of microbiological culture media on the measurement of colony-forming units (CFU) and microbial diversity was examined in this study. Two low-nutrient media formulations (i.e., dilute peptone, tryptone, yeast extract, and glucose medium [PTYG] and a soil extract medium) gave equivalent estimates of CFU (maximum of about 6.5 x 10(5) CFU/g). However, a higher nutrient medium, organic nutrients with brain-heart infusion (N/BHI), gave lower numbers than the dilute PTYG. A medium used to enumerate fungi also gave significantly lower counts than the dilute PTYG medium. Although the correlations were highly significant among total CFU numbers measured with the different types of media, we found few significant correlations in several indices of microbial diversity, and the correlation coefficients were below 0.25. Thus, CFU was a relatively robust measurement,but microbial diversity was not consistent between the media. Species richness was highest with the higher nutrient N/BHI medium, and N/BHI may be a better choice for a study of diversity as determined by colony morphology.
RP Palumbo, AV (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA.
RI Palumbo, Anthony/A-4764-2011; phelps, tommy/A-5244-2011
OI Palumbo, Anthony/0000-0002-1102-3975;
NR 27
TC 11
Z9 13
U1 1
U2 1
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 905
EP 914
DI 10.1007/BF02941771
PG 10
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700091
ER
PT J
AU BerededSamuel, Y
Petersen, JN
Skeen, RS
AF BerededSamuel, Y
Petersen, JN
Skeen, RS
TI Effect of perchloroethylene (PCE) on methane and acetate production by a
methanogenic consortium
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE methanogenic; acetogenic; PCE; inhibition
ID REDUCTIVE DECHLORINATION; TETRACHLOROETHYLENE; TOXICITY;
TRICHLOROETHYLENE; BACTERIA; CHLORIDE
AB The effects of perchloroethylene (PCE) concentration in the range of 0-100 mg/L on methane and acetate production by a methanol-enriched methanogenic consortia were investigated at 17 degrees C. The results indicate that PCE is more inhibitory to methanogenesis than to acetogenesis. At concentrations as low as 10 ppm, PCE affects the methanogenic activity of the consortium, and has completely inhibited this activity at 100 ppm. Conversely, PCE does not begin to inhibit acetogenic activity until the concentration is above 10 ppm, and has not completely inhibited it even at a PCE concentration of 100 ppm.
C1 WASHINGTON STATE UNIV, DEPT CHEM ENGN, PULLMAN, WA 99164 USA.
PACIFIC NW LAB, RICHLAND, WA USA.
RI Petersen, James/B-8924-2008
NR 15
TC 3
Z9 3
U1 1
U2 1
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 915
EP 922
DI 10.1007/BF02941772
PG 8
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700092
ER
PT J
AU Zhang, CL
Liu, S
Logan, J
Mazumder, R
Phelps, TJ
AF Zhang, CL
Liu, S
Logan, J
Mazumder, R
Phelps, TJ
TI Enhancement of Fe(III), Co(III), and Cr(VI) reduction at elevated
temperatures and by a thermophilic bacterium
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE thermophilic bacterium; metal reduction; ferric citrate; Co(III)EDTA;
chromate
ID FERRIC IRON; ENVIRONMENTS; MANGANESE
AB An unusual thermophilic bacterium has been isolated from deep subsurface sediments and tested for its ability to enhance Fe(III), Co(III), and Cr(VI) reduction. Without the bacterium, abiotic metal reduction was insignificant at temperatures below 45 degrees C, but became a major process at 75 degrees C. Addition of the bacterium enhanced the reduction of these metals up to fourfold, probably by nonspecific mechanisms. This study demonstrates abiotic and biotic metal reduction under organic-rich thermic conditions, and suggests that thermally and/or biologically enhanced metal reduction may provide an alternative for remediating metal contamination.
C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831.
RI phelps, tommy/A-5244-2011
NR 22
TC 42
Z9 45
U1 0
U2 6
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 923
EP 932
DI 10.1007/BF02941773
PG 10
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700093
ER
PT J
AU Rivard, CJ
Nagle, NJ
AF Rivard, CJ
Nagle, NJ
TI Pretreatment technology for the beneficial biological reuse of municipal
sewage sludges
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE sewage sludge; pretreatment, shear; sonication; thermal treatment;
anaerobic digestion
AB Modern municipal sewage waste treatment plants use conventional mechanical and biological processes to reclaim waste waters. This process has the overall effect of converting a water pollution problem into a solid waste disposal problem (sludges). The costs for conventional disposal of Sewage sludges have risen dramatically because of increased environmental mandates, which restrict their disposal, as well as a dwindling number of landfills. Previously, we determined that secondary bioprocessing (specifically anaerobic digestion) was not effective in reducing the organic content and bulk of the sludge waste (1). Therefore, we have examined the potential of a variety of pretreatment technologies designed to disrupt the macrostructure of the sludge and thereby enhance its subsequent biodegradation. Two thermal/mechanical pretreatments tested were found to have a dramatic effect on the subsequent bioconversion of the microbial sludges. Both technologies evaluated, sonication and shear, were found to be affected by sludge solids levels, duration of treatment, and treatment temperature. Optimum sonication pretreatment occurred with sludge solids of 1% and treatment times of 4-8 min. The most effectivee treatment temperature tested was 55 degrees C. The optimum enhancement in bioconversion potential for the sonication pretreatment was 80-83% of the materials carbon oxygen demand (COD) content. The optimum shear pretreatment occurred with sludge solids of 1-2% and treatment times of 6-10 min. The most effective treatment temperature tested was 87 degrees C. The optimum enhancement in bioconversion potential for the shear pretreatment was 88-90% of the material's COD content. These data were the basis for US parent no. 5,380,445, granted January 10, 1995.
RP Rivard, CJ (reprint author), NATL RENEWABLE ENERGY LAB,ALTERNAT FUELS DIV,APPL BIOL SCI BRANCH,GOLDEN,CO 80401, USA.
NR 26
TC 11
Z9 12
U1 2
U2 11
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 983
EP 991
DI 10.1007/BF02941778
PG 9
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700098
ER
PT J
AU Selvaraj, PT
Meyer, GB
Kaufman, EN
AF Selvaraj, PT
Meyer, GB
Kaufman, EN
TI Microbial reduction of sulfur dioxide in immobilized, mixed cultures of
sulfate-reducing bacteria with sewage digest as carbon and energy source
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Article; Proceedings Paper
CT 17th Symposium on Biotechnology for Fuels and Chemicals
CY MAY 07-11, 1995
CL VAIL, CO
SP US DOE, Off Alternat Fuels, US DOE, Off Ind Proc, Natl Renewable Energy Lab, Oak Ridge Natl Lab, Idaho Natl Engn Lab, Argonne Natl Lab, A E Staley Mfg Co, Archer Daniel Midland Co, Bio Tech Resources L P, Chronopol Inc, Colorado Inst Res Biotechnol, Dow Chem, DuPont Co, Enzyme Bio Syst Ltd, FermPro Mfg L P, Gist Brocades, Golden Technol Co Inc, Grain Proc Corp, Martin Marietta Energy Syst, Natl Corn Growers Assoc, New Energy Co Indiana, L P, Raphael Katzen Associated Int Inc, S Point Ethanol, St Lawrence Technol Inc, Weyerhaeuser, Amer Chem Soc, Div Biochem Technol
DE sulfur dioxide; flue gas desulfurization; sulfate-reducing bacteria;
anaerobic digestion; immobilization
ID BEADS
RP Selvaraj, PT (reprint author), OAK RIDGE NATL LAB,BIOPROC RES & DEV CTR,OAK RIDGE,TN 37831, USA.
NR 10
TC 7
Z9 7
U1 0
U2 3
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP 993
EP 1002
DI 10.1007/BF02941779
PG 10
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700099
ER
PT J
AU Wyman, CE
Davison, BH
AF Wyman, CE
Davison, BH
TI Introduction to the Proceedings of the Seventeenth Symposium on
Biotechnology for Fuels and Chemicals
SO APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
LA English
DT Editorial Material
C1 OAK RIDGE NATL LAB,OAK RIDGE,TN.
RP Wyman, CE (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA.
RI Davison, Brian/D-7617-2013
OI Davison, Brian/0000-0002-7408-3609
NR 0
TC 0
Z9 0
U1 0
U2 0
PU HUMANA PRESS INC
PI TOTOWA
PA 999 RIVERVIEW DRIVE SUITE 208, TOTOWA, NJ 07512
SN 0273-2289
J9 APPL BIOCHEM BIOTECH
JI Appl. Biochem. Biotechnol.
PD SPR
PY 1996
VL 57-8
BP R3
EP R6
DI 10.1007/BF02941681
PG 4
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology
GA UL857
UT WOS:A1996UL85700001
ER
PT J
AU Babu, GRV
Vijaya, OK
Ross, VL
Wolfram, JH
Chapatwala, KD
AF Babu, GRV
Vijaya, OK
Ross, VL
Wolfram, JH
Chapatwala, KD
TI Cell-free extract(s) of Pseudomonas putida catalyzes the conversion of
cyanides, cyanates, thiocyanates, formamide, and cyanide-containing mine
waters into ammonia
SO APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
LA English
DT Article
ID IMMOBILIZED CELLS; NITRILE COMPOUNDS; DEGRADATION; FLUORESCENS;
PURIFICATION; ENZYME; BIODEGRADATION; ACETONITRILE; NITROGEN; STRAIN
AB Our isolate, Pseudomonas putida, is known to be capable of utilizing cyanides as the sole source of carbon (C) and nitrogen (N) both in the form of free cells and cells immobilized in calcium alginate. In the present study, the cell-free extract(s) were prepared from the cells of P. putida grown in the presence of sodium cyanide. The ability of enzyme(s) to convert cyanides, cyanates, thiocyanates, formamide and cyanide-containing mine waters into ammonia (NH3) was studied at pH 7.5 and pH 9.5. The kinetic analysis of cyanide and formamide conversion into NH3 at pH 7.5 and pH 9.5 by the cell-free extract(s) of P. putida was also studied. The K-m and V-max values for cyanide/formamide were found to be 4.3/8 mM and 142/227 mu mol NH3 released mg protein(-1) min(-1) respectively at pH 7.5 and 5/16.67 mM and 181/434 mu mol NH3 released mg protein(-1) h(-1) respectively at pH 9.5. The study thus concludes that the cell-free extract(s) of P. putida is able to metabolize not only cyanides, cyanates, thiocyanates, and formamide but also cyanide-containing mine waters to NH3.
C1 SELMA UNIV,DIV NAT SCI,SELMA,AL 36701.
LOCKHEED IDAHO TECHNOL CO,DIV BIOTECHNOL,IDAHO FALLS,ID 83415.
NR 28
TC 15
Z9 16
U1 0
U2 1
PU SPRINGER VERLAG
PI NEW YORK
PA 175 FIFTH AVE, NEW YORK, NY 10010
SN 0175-7598
J9 APPL MICROBIOL BIOT
JI Appl. Microbiol. Biotechnol.
PD MAR
PY 1996
VL 45
IS 1-2
BP 273
EP 277
PG 5
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA UB002
UT WOS:A1996UB00200044
PM 8920201
ER
PT J
AU Wang, SJ
Lin, WY
Chen, MN
Hsieh, BT
Shen, LH
Tsai, ZT
Ting, G
Knapp, FF
AF Wang, SJ
Lin, WY
Chen, MN
Hsieh, BT
Shen, LH
Tsai, ZT
Ting, G
Knapp, FF
TI Radiolabelling of lipiodol with generator-produced Re-188 for hepatic
tumor therapy
SO APPLIED RADIATION AND ISOTOPES
LA English
DT Article
ID HEPATOCELLULAR-CARCINOMA; IODIZED OIL; ANTICANCER AGENTS; LIVER;
INJECTION; ARTERY; CANCER
AB In this study we prepared and analyzed the biodistribution of Re-188-labelled Lipiodol ([Re-188]-Lipiodol) in rats after intrahepatic arterial injection. EDTB was synthesized by condensation of 1,2-benzenediamine and ethylenediaminetetraacetic acid (EDTA). The labelling efficiency of[Re-188] Lipiodol was determined to be greater than 97% by ITLC developed with n-hexane. Following incubation of the [Re-188] Lipiodol with an equal volume of serum at 37 degrees C for 48 h, ITLC indicated good in vitro stability. Approximately 7.4 MBq [Re-188] Lipiodol was injected in each rat via the hepatic artery and samples of liver, spleen, muscle, lung, kidney, bone, whole blood and testis were obtained. [Re-188] Lipiodol tissue concentrations showed that after 1 h intrahepatic injection most of the radiotracer was retained in the liver, and was eliminated slowly with a biological half-life of 33.5 h. Radioactivity levels in the lung, kidney and blood were moderate at 1 h, and declined rapidly over time. In the spleen, muscle, testis and bone, radiation levels were insignificant. These initial results indicate that [Re-188] Lipiodol may be a potential radiopharmaceutical agent for the treatment of liver tumors.
C1 NATL YANG MING MED COLL,TAIPEI 11221,TAIWAN.
INST NUCL ENERGY RES,LUNGTAN 32500,TAIWAN.
OAK RIDGE NATL LAB,NUCL MED GRP,OAK RIDGE,TN 37831.
RP Wang, SJ (reprint author), TAICHUNG VET GEN HOSP,DEPT NUCL MED,160 SEC 3,TAICHUNG HARBOR RD,TAICHUNG,TAIWAN.
NR 24
TC 24
Z9 27
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0969-8043
J9 APPL RADIAT ISOTOPES
JI Appl. Radiat. Isot.
PD MAR
PY 1996
VL 47
IS 3
BP 267
EP 271
DI 10.1016/0969-8043(95)00300-2
PG 5
WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology,
Nuclear Medicine & Medical Imaging
SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA UM123
UT WOS:A1996UM12300001
PM 8935963
ER
PT J
AU Dadachova, E
Smith, SV
Mirzadeh, S
AF Dadachova, E
Smith, SV
Mirzadeh, S
TI Electrolytic reduction of carrier-free Re-188
SO APPLIED RADIATION AND ISOTOPES
LA English
DT Article
ID MONOCLONAL-ANTIBODIES; TECHNETIUM; RHENIUM
AB Electrolytic reduction of Re-188(7+) as an alternative to reduction with SnCl2 for protein labeling has been investigated. The electrolysis cell consisted of an ''H'' type cell with a tungsten cathode and a platinum anode, and 7 M HCl as the supporting electrolyte. Reduction of (ReO4-)-Re-188 was conducted at 25-35 V (I = 0.05-0.5 A, current density on cathode 4 x 10(-3)-4 x 10(-2) A cm(-2)) for 15 min. Ascending paper chromatography on Whatman DE81 paper in 7 M HCl at 4 degrees C confirmed that 75-77% of Re-188 was reduced to the + 5 oxidation state. Subsequent to evaporation of 7 M HCl under nitrogen, it was shown that the reduced Re-188(5+) as complexed with DMSA (meso-1,2-dimercaptosuccinic acid) or citrate at pH = 4.5 was stable with regard to reoxidation for up to 40 min.
C1 OAK RIDGE NATL LAB,NUCL MED GRP,OAK RIDGE,TN 37831.
RP Dadachova, E (reprint author), AUSTRALIAN NUCL SCI & TECHNOL ORG,BIOMED & HLTH PROGRAM,PMB 1,MENAI,NSW 2234,AUSTRALIA.
RI Dadachova, Ekaterina/I-7838-2013
NR 20
TC 2
Z9 2
U1 0
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0969-8043
J9 APPL RADIAT ISOTOPES
JI Appl. Radiat. Isot.
PD MAR
PY 1996
VL 47
IS 3
BP 289
EP 292
DI 10.1016/0969-8043(95)00301-0
PG 4
WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Radiology,
Nuclear Medicine & Medical Imaging
SC Chemistry; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
GA UM123
UT WOS:A1996UM12300005
ER
PT J
AU Stallard, BR
Garcia, MJ
Kaushik, S
AF Stallard, BR
Garcia, MJ
Kaushik, S
TI Near-TR reflectance spectroscopy for the determination of motor oil
contamination in sandy loam
SO APPLIED SPECTROSCOPY
LA English
DT Article
DE near-IR spectroscopy; soil contamination; chemometrics; environmental
applications of optical spectroscopy; reflectance spectroscopy; field
instrumentation
ID QUANTITATIVE SPECTRAL-ANALYSIS
AB We have investigated the application of near-IR reflectance spectroscopy to the determination of motor oil contamination in sandy loam, Although the present work is concerned with a specific case of contamination, we discuss the possibility of applying the method to other organic contaminants and other types of soil. The spectral region considered was 1600-1900 nm, which contains the first overtone of the CH stretch. Using a commercial Fourier transform spectrometer together with cross-validated partial least-squares data analysis, the one-sigma precision for the determination of motor oil in sandy loam was 0.17 wt % (0.13 to 0.26 wt % at the 95% confidence level). The largest contribution to the precision of the determination was sampling error, or inhomogeneity in each sample. Given the precision limit imposed by the sampling error, rye found that the performance of the spectrometer could be lowered without affecting the overall precision. In a modeling exercise, adequate performance was obtained with a spectrometer having only seven spectral channels with a spectral resolution of 10 nm and a spectral noise level of 10(-3) absorbance units. A design for an inexpensive miniature instrument is presented.
RP Stallard, BR (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 7
TC 28
Z9 28
U1 0
U2 3
PU SOC APPLIED SPECTROSCOPY
PI FREDERICK
PA PO BOX 1438, FREDERICK, MD 21701
SN 0003-7028
J9 APPL SPECTROSC
JI Appl. Spectrosc.
PD MAR
PY 1996
VL 50
IS 3
BP 334
EP 338
DI 10.1366/0003702963906221
PG 5
WC Instruments & Instrumentation; Spectroscopy
SC Instruments & Instrumentation; Spectroscopy
GA TZ437
UT WOS:A1996TZ43700008
ER
PT J
AU Niemann, RC
Evans, DJ
Rey, CM
AF Niemann, RC
Evans, DJ
Rey, CM
TI Thermal and electrical stabilization of high-temperature superconductor
powder-in-tube conductor
SO APPLIED SUPERCONDUCTIVITY
LA English
DT Article
ID BI-2223
AB High-temperature superconductor (HTS) powder-in-tube conductors often require thermal and/or electrical stabilization to ensure their long-term integrity. An example of such a stabilization need is the safety bypass lead of an HTS current lead intended for application to superconducting magnetic energy storage (SMES) devices. The bypass lead functions include current sharing during upset conditions and conductor element temperature control. This paper presents a bypass lead design for an HTS current lead in an 0.5 MW h SMES system. Included are predictions of thermal and electrical stabilization and current lead heat leaks. The results of a supporting development program are presented as are details of a method to connect conductor element/bypass leads, an assembly procedure, a cleaning method, and thermal-stress tolerance measurements.
C1 BABCOCK & WILCOX CO,NAVAL NUCL FUEL DIV,LYNCHBURG,VA 24505.
RP Niemann, RC (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0964-1807
J9 APPL SUPERCOND
JI Appl. Supercond.
PD MAR
PY 1996
VL 4
IS 3
BP 157
EP 165
DI 10.1016/S0964-1807(96)00021-X
PG 9
WC Materials Science, Multidisciplinary; Physics, Applied; Physics,
Condensed Matter
SC Materials Science; Physics
GA WJ374
UT WOS:A1996WJ37400005
ER
PT J
AU Chen, CL
Tsong, TT
Mitchell, TE
AF Chen, CL
Tsong, TT
Mitchell, TE
TI Surface diffusion and surface atomic roughness on Ir(001) surface and
terraces
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID EXCHANGE MECHANISM; REPLACEMENT; BEHAVIOR; IRIDIUM; ADATOM
AB Diffusion of iridium and rhenium on Ir(001) surfaces have been studied by field ion microscopy. Self-adsorbed iridium adatoms have been found to diffuse favorably along [100] directions by an atomic exchange-replacement mechanism. Rhenium adatoms force out one of four nearest neighboring iridium substrate atoms to form Re-Ir dimer vacancy complexes at similar to 240 K, which can change orientation by 90 degrees in the temperature range from 210 to 280 K. The configuration of the Re-Ir dimer vacancy complex is considered to be the intermediate step of the atomic exchange-replacement diffusion mechanism. Unlike the diffusion of adatoms on the Ir(001) surface, ledge atoms on Ir(001) terraces diffuse only along [110] steps at low temperatures by an ordinary atomic hopping diffusion mechanism. The diffusing ledge atom is trapped at one end of the step. The barrier potential that a trapped ledge atom needs to overcome for diffusing away from the trap is found to be 0.73 eV, which is about 0.11 eV higher than the barrier for a diffusing ledge atom migrating along the step (0.62 eV). Surface step atoms start to dissociate from various sites randomly at similar to 1/6 of the melting temperature of iridium so that one-dimensional step roughening occurs. By measuring the mean square deviation of the step heights at various temperatures, the kink energy for the Ir(001) steps is found to be 1.36 eV.
C1 ACAD SINICA,INST PHYS,TAIPEI 11529,TAIWAN.
RP Chen, CL (reprint author), LOS ALAMOS NATL LAB,DIV MAT SCI & TECHNOL,LOS ALAMOS,NM 87545, USA.
NR 16
TC 0
Z9 0
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 224
EP 230
DI 10.1016/0169-4332(95)00380-0
PG 7
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900034
ER
PT J
AU Babu, SS
David, SA
Miller, MK
AF Babu, SS
David, SA
Miller, MK
TI Microstructural development in PWA-1480 electron beam welds - An atom
probe field ion microscopy study
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID BASE SUPERALLOYS; NI3AL ALLOYS; CRACKING
AB The microstructural development in PWA-1480 superalloy electron beam welds (Ni-11.0at%Al-11.5%Cr-1.9%Ti-5.1%Co-4.0%Ta-1.3%W) was characterized. Optical microscopy revealed a branched dendritic structure in the weld metal. Transmission electron microscopy of these welds, in the as-welded condition, showed fine cuboidal (0.05-0.5 mu m) L1(2)-ordered gamma' precipitates within the gamma grains. The average volume percentage of the gamma' precipitates was found to be similar to 75%. Atom probe analyses revealed that the composition of the gamma matrix was Ni-4.6at%Al-25.5%Cr-0.4%Ti-9.4%Co-0.8%Ta-2.9%W and that of the gamma' precipitates was Ni-18.2at%Al-2.6%Cr-2.4%Ti-2.8%Co-7.1%Ta-1.5%W. These compositions were compared with the previous APFIM analyses of commercial PWA-1480 single crystals that had received conventional heat treatments. Small differences were found in the chromium and aluminum levels and these may be due to the nonequilibrium nature of phase transformations that occur during weld cooling. No solute segregation was detected at the gamma-gamma' interface. The APFIM results were also compared with the thermodynamic calculations of alloying element partitioning between the gamma and gamma' phases using the ThermoCalc(TM) program.
RP Babu, SS (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA.
RI Babu, Sudarsanam/D-1694-2010
OI Babu, Sudarsanam/0000-0002-3531-2579
NR 14
TC 10
Z9 10
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 280
EP 287
DI 10.1016/0169-4332(95)00387-8
PG 8
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900042
ER
PT J
AU Miller, MK
Anderson, IM
Russell, KF
AF Miller, MK
Anderson, IM
Russell, KF
TI Precipitation and grain boundary segregation in molybdenum-doped NiAl
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
AB An atom probe field ion microscopy characterization of the precipitate and grain boundary composition of an NiAl alloy doped with 0.7 at% Mo has been performed. The microstructure of this alloy consisted of a low number density (similar to 1 to 2 x 10(21) m(-3)) of 10 to 50 nm diameter spherical Mo-(3.3 +/- 0.6)at%Al precipitates embedded in the NiAl matrix. These precipitates generate an increase in yield stress of between 82 and 210 MPa which is in good agreement with the differences in the yield stresses of the molybdenum-doped (254 MPa) and undoped alloys (154 MPa). Atom probe analysis of the B2-ordered matrix revealed extremely limited solute content of Mo and other impurities: Ni-(50.4 +/- 1.2)%Al-(0.005 +/- 0.001)%Mo, 0.007 +/- 0.002% Fe, 0.005 +/- 0.001% Si and N and 0.0004 +/- 0.0004% V. A detailed examination (> 115 000 total ions) yielded grain boundary concentrations of 0.7% Mo, 0.4% Si and N, 0.09% C, 0.04% B, and 0.02% Fe. Despite these relatively low values, the molybdenum, silicon and nitrogen, boron, and iron levels represent enrichments of similar to 140, similar to 80, similar to 85 and similar to 3 times the matrix level, respectively. The carbon level at the boundary was also significantly enriched.
RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA.
NR 12
TC 6
Z9 6
U1 0
U2 3
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 288
EP 294
DI 10.1016/0169-4332(95)00388-6
PG 7
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900043
ER
PT J
AU Thomson, RC
Miller, MK
AF Thomson, RC
Miller, MK
TI An atom probe study of cementite precipitation in autotempered
martensite in an Fe-Mn-C alloy
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID STEEL
AB Atom probe field ion microscopy has been used to determine the concentration profile of the substitutional solute element manganese through cementite particles in martensite in a ternary Fe-3Mn-0.1C (wt%) alloy. The start temperature of the martensite reaction (M(s)) in this alloy has been determined to be 380 degrees C, which is relatively high. This means that as the specimen is quenched using helium gas, after austenitising, cementite particles are able to precipitate within the martensite plates which form at or near the M(s) temperature. The atom probe results revealed that, in the case of autotempered martensite, there is no significant partitioning of the manganese between the cementite and the supersaturated ferrite matrix.
C1 UNIV CAMBRIDGE,DEPT MAT SCI & MET,CAMBRIDGE CB2 3QZ,ENGLAND.
OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831.
RI Thomson, Rachel/B-4217-2011
OI Thomson, Rachel/0000-0002-3681-0107
NR 14
TC 13
Z9 13
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 313
EP 319
DI 10.1016/0169-4332(95)00392-4
PG 7
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900047
ER
PT J
AU Pareige, PJ
Russell, KF
Miller, MK
AF Pareige, PJ
Russell, KF
Miller, MK
TI APFIM studies of the phase transformations in thermally aged ferritic
FeCuNi alloys: Comparison with aging under neutron irradiation
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID ATOM PROBE; COPPER; PRECIPITATION
AB An atom probe field ion microscopy characterization has been performed on a ternary Fe-1.28wt%Cu-1.43wt%Ni model alloy. Two sets of heat treatments at 400 and 500 degrees C were selected to follow the decomposition of the solid solution. The atom probe results suggest that the precipitation of copper from the body-centered cubic matrix involves classical nucleation, growth and coarsening processes. Nickel does not appear to be involved in these processes. The nickel and iron detected in the small particles in the early stage is rejected from the particles during subsequent growth and coarsening. The comparison of these data with those observed in neutron-irradiated pressure Vessel steels and in Fe-0.28wt%Cu-0.7wt47%Ni model steel indicates that thermal aging of ternary FeCuNi model alloys is not an appropriate process to elucidate the phase transformations in neutron-irradiated pressure vessel steels, and that the high nickel level detected in the clusters in the irradiated pressure vessel steels may be due to a ''radiation-induced'' rather than a ''radiation-enhanced'' precipitation process.
C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831.
RI PAREIGE, Philippe/A-2588-2013
NR 14
TC 42
Z9 45
U1 0
U2 8
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 362
EP 369
DI 10.1016/0169-4332(95)00398-3
PG 8
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900054
ER
PT J
AU Pareige, P
Miller, MK
AF Pareige, P
Miller, MK
TI Characterization of neutron-induced copper-enriched clusters in pressure
vessel steel weld: An APFIM study
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID ATOM PROBE
AB Embrittlement of pressure vessel steels is controlled by complex interactions between a large number of variables making purely empirical predictions unreliable, It is necessary to have an accurate description of the changes that occur in the microstructure during neutron irradiation, A detailed atom probe field ion microscope examination of the microstructure of a neutron-irradiated commercial A533B-type weld (3.5 x 10(19) n cm(-2) (E> 1 MeV) at 283 degrees C) is reported in this study. The plane-by-plane type analysis provides an accurate description of the neutron-induced copper-enriched clusters. The size, the morphology, the spatial distribution of solutes and the chemical composition of these features are determined. The matrix chemistry of this irradiated material was determined and compared with the as-fabricated weld and weld material that had been thermally aged for 93000 h at 28O degrees C. This comparison isolated the effect of neutron irradiation from any thermally induced microstructural evolution.
C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831.
RI PAREIGE, Philippe/A-2588-2013
NR 14
TC 41
Z9 42
U1 0
U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 370
EP 377
DI 10.1016/0169-4332(95)00399-1
PG 8
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900055
ER
PT J
AU Miller, MK
Russell, KF
AF Miller, MK
Russell, KF
TI APFIM characterization of a high phosphorus Russian RPV weld
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID PRESSURE-VESSEL STEELS; FIELD-ION MICROSCOPY
AB A microstructural characterization of a high phosphorus (0.035 wt% P) weld from the pressure vessel of a Russian VVER nuclear reactor has been performed. The microstructure of these steels consists of intragranular and intergranular vanadium carbonitride precipitates of average composition 51.3 +/- 0.9 at% V, 18.8 +/- 0.7 at% C, 22.1 +/- 0.7 at% N, 4.9 +/- 0.4 at% Cr, 2.4 +/- 0.3 at% Mo, 0.36 +/- 0.05 at% Fe, 0.07 +/- 0.05 at% B and 0.03 +/- 0.03 at% P. The lath and grain boundaries were also coated with a thin film of molybdenum carbonitride precipitates, The phosphorus coverage at the boundaries in the unirradiated material was similar to 13% of a monolayer in agreement with predictions from the McLean model of equilibrium segregation. After neutron irradiation to a fluence of 1.15 x 10(20) n cm(-2), the phosphorus coverage had increased significantly to up to similar to 60% of a monolayer. This result indicates that neutron irradiation significantly enhanced the phosphorus segregation process. Phosphorus and copper clusters were also observed in the matrix of the neutron-irradiated material.
RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA.
NR 13
TC 12
Z9 15
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 378
EP 383
DI 10.1016/0169-4332(95)00400-9
PG 6
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900056
ER
PT J
AU Miller, MK
Anderson, IM
Bentley, J
Russell, KF
AF Miller, MK
Anderson, IM
Bentley, J
Russell, KF
TI Phase separation in the Fe-Cr-Ni system
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID DUPLEX STAINLESS-STEELS; ATOM-PROBE; APFIM
AB The phase relations and microstructures of a series of isothermally aged Fe-45%Cr-5%Ni alloys have been determined with a combination of atom probe field ion microscopy, transmission electron microscopy, electron probe microanalysis and optical microscopy. The position of the miscibility gap has been determined. The phases composing the alloy varied with the isothermal ageing temperature. At the highest temperatures, 650 and 600 degrees C, only the sigma phase was observed, At the lowest temperature, 400 degrees C, the alloy was composed entirely of the alpha and alpha' phases. At intermediate temperatures, the near-surface region of the sheet was composed of the a phase and the interior of the sheet of the alpha and alpha' mixture. The morphology of the alpha' regions was a complex interconnected network structure at 400 and 500 degrees C and isolated regions at 550 degrees C. The addition of nickel to the binary Fe-45%Cr alloy was observed to raise the critical temperature of the miscibility gap and skew it to higher chromium concentrations, In the alpha end alpha' two-phase mixture, the nickel was found to partition preferentially to the cu phase, The experimental results are compared with the predictions of the Thermocalc(TM) program.
RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,MICROSCOPY & MICROANALYT SCI GRP,POB 2008,OAK RIDGE,TN 37831, USA.
NR 13
TC 11
Z9 11
U1 2
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 391
EP 397
DI 10.1016/0169-4332(95)00402-5
PG 7
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900058
ER
PT J
AU Miller, MK
Russell, KF
AF Miller, MK
Russell, KF
TI Comparison of the rate of decomposition in Fe-45%Cr, Fe-45%Cr-5%Ni and
duplex stainless steels
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID ATOM-PROBE; PHASE; CR; NI
AB A comparison has been made of the rate of decomposition of the ferrite in an Fe-45%Cr, Fe-45%Cr-5%Ni and the ferrite phase of two CF 3 duplex stainless steels during long term ageing at 400 degrees C. In all these stems, the ferrite phase decomposes upon ageing to form an ultrafine-scale interconnected network structure of an iron-rich alpha phase and alpha chromium-enriched alpha' phase. The addition of nickel to the binary Fe-45%Cr alloy significantly increases the hardness of the alloy and also accelerates the kinetics of decomposition. Although the hardness data from the ternary alloys are similar to those of the ferrite phase in the duplex stainless steels, significant differences were also observed in the scale and composition amplitudes of the alpha and alpha' phases.
RP Miller, MK (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA.
NR 13
TC 15
Z9 15
U1 1
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 398
EP 402
DI 10.1016/0169-4332(95)00403-3
PG 5
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900059
ER
PT J
AU Chan, DK
Seidman, DN
Merkle, KL
AF Chan, DK
Seidman, DN
Merkle, KL
TI The chemistry and structure of {222}CdO/Ag heterophase interfaces on an
atomic scale
SO APPLIED SURFACE SCIENCE
LA English
DT Article; Proceedings Paper
CT 42nd International Field Emission Symposium
CY AUG 07-11, 1995
CL MADISON, WI
ID METAL; HYDROGEN; GROWTH
AB The chemistry and structure of {222} CdO/Ag (ceramic/metal) heterophase interfaces are determined with sub-nanometer chemical and structural spatial resolution employing atom-probe field-ion and high-resolution electron microscopies. The interfaces are produced in a controlled manner via internal oxidation of a Ag-1.62at%Cd alloy, which results in the formation of CdO precipitates in a Ag matrix. The CdO precipitates are octahedral-shaped with facets on the {222} polar planes, and have a cube-on-cube orientation relationship with the Ag matrix. Atom-probe analyses are made along the chemically-ordered CdO [111]-type directions, thereby perpendicularly intersecting the {222} interfaces. A total of 35 {222} heterophase interfaces is chemically analyzed, of which 19 have the chemical sequence Ag\O\Cd\... and 16 the sequence Ag\Cd\O\.... High resolution electron microscopy analyses reveal that the {222} facet planes of the CdO precipitates contain atomic height ledges, therefore indicating that the preciptates were in a coarsening stage. The combined atom-probe and high-resolution electron microscope results demonstrate that the chemistry of the terminating {222} facet plane of CdO is controlled by coarsening kinetics.
C1 NORTHWESTERN UNIV,DEPT MAT SCI & ENGN,EVANSTON,IL 60208.
NORTHWESTERN UNIV,MAT RES CTR,EVANSTON,IL 60208.
ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439.
RI Seidman, David/B-6697-2009
NR 33
TC 3
Z9 3
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-4332
J9 APPL SURF SCI
JI Appl. Surf. Sci.
PD MAR
PY 1996
VL 94-5
BP 409
EP 415
DI 10.1016/0169-4332(95)00404-1
PG 7
WC Chemistry, Physical; Materials Science, Coatings & Films; Physics,
Applied; Physics, Condensed Matter
SC Chemistry; Materials Science; Physics
GA UT169
UT WOS:A1996UT16900061
ER
PT J
AU Christian, JE
Kosny, J
AF Christian, JE
Kosny, J
TI Thermal performance and wall ratings
SO ASHRAE JOURNAL-AMERICAN SOCIETY OF HEATING REFRIGERATING AND
AIR-CONDITIONING ENGINEERS
LA English
DT Article
RP Christian, JE (reprint author), US DOE,BLDG TECHNOL CTR,BLDG ENVELOPE SYST & MAT PROGRAM,WASHINGTON,DC 20585, USA.
NR 20
TC 4
Z9 4
U1 0
U2 2
PU AMER SOC HEAT REFRIG AIR- CONDITIONING ENG INC
PI ATLANTA
PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329
SN 0001-2491
J9 ASHRAE J
JI ASHRAE J.-Am. Soc. Heat Refrig. Air-Cond. Eng.
PD MAR
PY 1996
VL 38
IS 3
BP 56
EP &
PG 8
WC Thermodynamics; Construction & Building Technology; Engineering,
Mechanical
SC Thermodynamics; Construction & Building Technology; Engineering
GA TZ417
UT WOS:A1996TZ41700014
ER
PT J
AU Alcock, C
Allsman, RA
Axelrod, TS
Bennett, DP
Cook, KH
Freeman, KC
Griest, K
Marshall, SL
Peterson, BA
Pratt, MR
Quinn, PJ
Rodgers, AW
Stubbs, CW
Sutherland, S
Welch, DL
AF Alcock, C
Allsman, RA
Axelrod, TS
Bennett, DP
Cook, KH
Freeman, KC
Griest, K
Marshall, SL
Peterson, BA
Pratt, MR
Quinn, PJ
Rodgers, AW
Stubbs, CW
Sutherland, S
Welch, DL
TI The macho project LMC variable star inventory .2. LMC RR lyrae stars -
Pulsational characteristics and indications of a global youth of the LMC
SO ASTRONOMICAL JOURNAL
LA English
DT Article
ID GALACTIC GLOBULAR-CLUSTERS; COLOR-MAGNITUDE DIAGRAM; LARGE MAGELLANIC
CLOUD; FOURIER COEFFICIENTS; ABSOLUTE MAGNITUDES; HORIZONTAL-BRANCH;
PHOTOMETRY; HALO; M15; AGE
AB The Macho Project Year One Database contains photometric observations of twenty-two 40 arcmin fields in the bar region of the LMC which are analyzed to select stars with the properties of LMC field RR Lyrae stars. The resulting set of similar to 7900 stars, in the range of brightness 18.72.0.CO;2
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA UG176
UT WOS:A1996UG17600006
ER
PT J
AU Lamberto, DJ
Muzzio, FJ
Swanson, PD
Tonkovich, AL
AF Lamberto, DJ
Muzzio, FJ
Swanson, PD
Tonkovich, AL
TI Using time-dependent RPM to enhance mixing in stirred vessels
SO CHEMICAL ENGINEERING SCIENCE
LA English
DT Article
ID CHAOTIC FLOWS; SCALAR GRADIENTS; ADVECTION; SYSTEMS
AB Mixing under low to moderate Reynolds numbers is investigated experimentally in a stirred tank. An acid-base neutralization reaction and a pH indicator are used to reveal the existence, location, and size of segregated regions in the Bow. Such regions are observed for both unbaffled and baffled vessels stirred by either radial or axial flow impellers. These segregated regions have a complex internal structure consistent of several families of helical filaments wrapped around a central torus. It is demonstrated that the segregated regions are readily destroyed through the use of time-dependent RPM.
C1 RUTGERS STATE UNIV, DEPT CHEM & BIOCHEM ENGN, PISCATAWAY, NJ 08855 USA.
PACIFIC NW LAB, CHEM PROC DEV SECT, RICHLAND, WA 99352 USA.
NR 34
TC 147
Z9 158
U1 5
U2 15
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 MAR
PY 1996
VL 51
IS 5
BP 733
EP +
DI 10.1016/0009-2509(95)00203-0
PG 8
WC Engineering, Chemical
SC Engineering
GA TX953
UT WOS:A1996TX95300008
ER
PT J
AU Tonkovich, ALY
Zilka, JL
Jimenez, DM
Roberts, GL
Cox, JL
AF Tonkovich, ALY
Zilka, JL
Jimenez, DM
Roberts, GL
Cox, JL
TI Experimental investigations of inorganic membrane reactors: A
distributed feed approach for partial oxidation reactions
SO CHEMICAL ENGINEERING SCIENCE
LA English
DT Article
ID CATALYTICALLY ACTIVE MEMBRANES; HIGH-TEMPERATURE; DEHYDROGENATION
REACTION; ETHANE DEHYDROGENATION; ACID CATALYST; METHANE; SILVER;
DECOMPOSITION; SELECTIVITY; ENHANCEMENT
AB An inorganic membrane reactor (MBR) is investigated for the oxidative dehydrogenation of ethane to ethylene. A tube and shell configuration is used where ethane is fed at the top of an annular packed catalyst bed and air permeates radially outward into the reaction zone along the length of the permeable reactor wall (porous alpha-alumina membrane). Using a magnesium oxide catalyst doped with lithium and samarium oxide, the effects of the overall ethane to oxygen feed ratio, temperature, and residence time are evaluated. The results are compared to a tubular reactor (PFR) operated with the same catalyst and conditions. The MBR outperforms the PFR in both ethylene yield and selectivity at low feed ratios. At 873 K, an ethane to oxygen feed ratio of 0.5, and a residence time of 4 s, per pass ethylene yields of 50.5 and 8.1% are produced in the MBR and PFR, respectively. The corresponding ethylene selectivities are 53 and 8.4%. As the feed ratio increases, the performance of the MBR and PFR merges. In addition, periodic counter-propagating blue flames are observed in the tubular reactor for some experiments with feed ratios between 0.25 and 1.0. No flames are observed in the MBR.
RP Tonkovich, ALY (reprint author), PACIFIC NW LAB, BATTELLE BLVD, POB 999, RICHLAND, WA 99352 USA.
NR 57
TC 66
Z9 68
U1 0
U2 16
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0009-2509
J9 CHEM ENG SCI
JI Chem. Eng. Sci.
PD MAR
PY 1996
VL 51
IS 5
BP 789
EP 806
DI 10.1016/0009-2509(95)00325-8
PG 18
WC Engineering, Chemical
SC Engineering
GA TX953
UT WOS:A1996TX95300012
ER
PT J
AU Bartels, DM
Roduner, E
AF Bartels, DM
Roduner, E
TI Reaction of H, D, and muonium atoms with I- in aqueous solution
SO CHEMICAL PHYSICS
LA English
DT Article
ID RATE CONSTANTS; CHEMICAL-REACTIONS; POLAR-SOLVENTS; HYDROGEN; GASES; HBR
AB Electron paramagnetic resonance free induction decay (FID) attenuation measurements are reported for the reaction of H and D atoms with I- in aqueous solution between 8 and 40 degrees C. Muon spin resonance experiments are reported for reaction of the light muonium atom (Mu) with I- between 5 and 90 degrees C. At 25 degrees C, we obtain scavenging rate constants of 5.3 X 10(7) M(-1) s(-1) for Mu, 2.8 X 10(8) M(-1) s(-1) for H, and 3.2 X 10(8) M(-1) s(-1) for D. The temperature coefficient for the reaction is slightly negative for all three isotopes; in terms of an Arrhenius law, the muonium rate constant has a -5.6 +/- 1.8 kJ/mol activation energy. We consider three models attempting to explain the strange kinetic behavior, based on gas phase collision theory, electronic curve crossing, and transition state theory with tunneling and dynamic solvent effects.
C1 UNIV ZURICH,INST PHYS CHEM,CH-8057 ZURICH,SWITZERLAND.
RP Bartels, DM (reprint author), ARGONNE NATL LAB,DIV CHEM,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 44
TC 2
Z9 2
U1 3
U2 7
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0301-0104
J9 CHEM PHYS
JI Chem. Phys.
PD MAR 1
PY 1996
VL 203
IS 3
BP 339
EP 349
DI 10.1016/0301-0104(95)00399-1
PG 11
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TX255
UT WOS:A1996TX25500004
ER
PT J
AU Xia, CF
Ward, TL
Schwartz, RW
AF Xia, CF
Ward, TL
Schwartz, RW
TI Aerosol-assisted chemical vapor deposition of CeO2-doped Y2O3-stabilized
ZrO2 films on porous ceramic supports for membrane applications
SO CHEMICAL VAPOR DEPOSITION
LA English
DT Article
ID STABILIZED ZIRCONIA; THIN-FILMS; GROWTH; ION
C1 SANDIA NATL LABS,ADV MAT LAB,ALBUQUERQUE,NM 87106.
RP Xia, CF (reprint author), UNIV NEW MEXICO,DEPT CHEM ENGN,ALBUQUERQUE,NM 87131, USA.
NR 21
TC 6
Z9 6
U1 0
U2 2
PU VCH PUBLISHERS INC
PI DEERFIELD BEACH
PA 303 NW 12TH AVE, DEERFIELD BEACH, FL 33442-1788
SN 0948-1907
J9 CHEM VAPOR DEPOS
JI Chem. Vapor Depos.
PD MAR
PY 1996
VL 2
IS 2
BP 48
EP 51
DI 10.1002/cvde.19960020205
PG 4
WC Electrochemistry; Materials Science, Coatings & Films; Physics,
Condensed Matter
SC Electrochemistry; Materials Science; Physics
GA UD787
UT WOS:A1996UD78700004
ER
PT J
AU Loy, DA
Jamison, GM
Baugher, BM
Myers, SA
Assink, RA
Shea, KJ
AF Loy, DA
Jamison, GM
Baugher, BM
Myers, SA
Assink, RA
Shea, KJ
TI Sol-gel synthesis of hybrid organic-inorganic materials. Hexylene- and
phenylene-bridged polysiloxanes
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID HYDROLYSIS; POLYMERS; POLYCONDENSATION; SILICA; NMR
AB New highly cross-linked polysiloxanes were prepared by sol-gel polymerization of 1,6-bis( diethoxymethylsilyl)hexane (1) and 1,4-bis (diethoxymethylsilyl)benzene (2). Hydrolysis and condensation of 1 and 2 under acidic and basic conditions with 4 equiv of water led to the rapid formation of hexylene- and phenylene-bridged polysiloxane gels. The dry gels (xerogels) were intractable, insoluble materials that were noticeably hydrophobic, exhibiting no swelling in organic solvents or water. Most of the xerogels were high surface area, mesoporous materials. Hexylene-bridged polysiloxanes prepared under acidic conditions were always nonporous regardless of whether they were processed to afford xerogels or supercritically dried as aerogels. Hexylene-bridged polysiloxanes prepared under basic conditions and all of the phenylene-bridged polysiloxanes were mesoporous with surface areas as high as 1025 m(2)/g.
C1 UNIV CALIF IRVINE,DEPT CHEM,IRVINE,CA 92717.
RP Loy, DA (reprint author), SANDIA NATL LABS,PROPERTIES ORGAN MAT DEPT,POB 5800,ALBUQUERQUE,NM 87185, USA.
RI Loy, Douglas/D-4847-2009
OI Loy, Douglas/0000-0001-7635-9958
NR 33
TC 87
Z9 88
U1 1
U2 24
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD MAR
PY 1996
VL 8
IS 3
BP 656
EP 663
DI 10.1021/cm950067z
PG 8
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA UA826
UT WOS:A1996UA82600010
ER
PT J
AU Vaughey, JT
Corbett, JD
AF Vaughey, JT
Corbett, JD
TI Synthesis and structure of Ca14GaP11 with the new hypervalent P-3(7-)
anion. Matrix effects within the family of isostructural alkaline-earth
metal pnictides
SO CHEMISTRY OF MATERIALS
LA English
DT Article
ID DISCRETE GAAS4 TETRAHEDRA; AS3 POLYATOMIC UNIT; INTERMETALLIC COMPOUNDS;
ZINTL COMPOUNDS; = CA; CA14GAAS11; ELEMENTS
AB The new Zintl phase Ca14GaP11 has been synthesized and studied by single-crystal X-ray diffraction. The compound is isostructural with Ca14AlSb11 and contains as separate anions a GaP49- tetrahedron, the novel hypervalent linear P-3(7-), and four isolated P3-. Th, phase is tetragonal, space group I4(1)/acd (No. 142) with Z = 8, a = 15.347 (4), c = 20.762 (8) A (296 K), R(F)/R(W) = 3.6/5.0% for 759 reflection (I/sigma(I) > 3) and 63 variables. The central P4 atom in P-3(7-) refines with its position split by 0.82 Angstrom which in the limit corresponds to disordered P3- and P-2(4-). Matrix effects in all 20 refined pnictide (Pn = P-Bi) examples of this structure are reflected by the cation environment about the Pn(7)(3-) anions. This approach provides complete correlation of the splittings of the central Pn4 atoms (or their displacement ellipsoid asymmetry) and the average distances in Pn(7)(3-). Increased asymmetry of and bond lengths in Pn(3)(7-) and, by implication, lesser phase stability are logically associated with smaller Pn, larger cations, and, to a smaller degree, increased size of the metal that centers the MPn(4) tetrahedra. Angular distortions of the last are similarly based.
C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011.
RP Vaughey, JT (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,DOE,AMES,IA 50011, USA.
OI Vaughey, John/0000-0002-2556-6129
NR 25
TC 16
Z9 16
U1 0
U2 1
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0897-4756
J9 CHEM MATER
JI Chem. Mat.
PD MAR
PY 1996
VL 8
IS 3
BP 671
EP 675
DI 10.1021/cm950396r
PG 5
WC Chemistry, Physical; Materials Science, Multidisciplinary
SC Chemistry; Materials Science
GA UA826
UT WOS:A1996UA82600012
ER
PT J
AU Helenbrook, BT
Sung, CJ
Law, CK
Ashurst, WT
AF Helenbrook, BT
Sung, CJ
Law, CK
Ashurst, WT
TI On stretch-affected flame propagation in vortical flows
SO COMBUSTION AND FLAME
LA English
DT Article
AB Flame propagation through an array of vortices was studied with a model which incorporated the variation of the local burning velocity with stretch. Assuming incompressible how, the mean burning velocities were calculated and compared to those of the Huygens limit. It was found that stretch causes a decrease in the mean burning velocity, and a mechanism which explains this trend was identified. The study also demonstrated that, as expected, stretch only has a significant effect on the mean burning velocity for vortices whose size is of the same order as that of the flame thickness.
C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 92037.
RP Helenbrook, BT (reprint author), PRINCETON UNIV,DEPT MECH & AEROSP ENGN,PRINCETON,NJ 08544, USA.
RI Law, Chung /E-1206-2013
NR 17
TC 11
Z9 11
U1 1
U2 2
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 MAR
PY 1996
VL 104
IS 4
BP 460
EP 468
DI 10.1016/0010-2180(95)00153-0
PG 9
WC Thermodynamics; Energy & Fuels; Engineering, Multidisciplinary;
Engineering, Chemical; Engineering, Mechanical
SC Thermodynamics; Energy & Fuels; Engineering
GA UB545
UT WOS:A1996UB54500006
ER
PT J
AU Bell, GI
AF Bell, GI
TI Evolution of simple sequence repeats
SO COMPUTERS & CHEMISTRY
LA English
DT Article
ID STEPWISE MUTATION MODEL; REPETITIVE DNA; POLYMORPHISMS; RECOMBINATION;
EXPRESSION; GENES
AB Simple Sequence Repeats (SSRs) are common and frequently polymorphic in eukaryote DNA. Many are subject to high rates of length mutation in which a gain or loss of one repeat unit is most often observed. Can the observed abundances and their length distributions be explained as the result of an unbiased random walk, starting from some initial repeat length? In order to address this question, we have considered two models for an unbiased random walk on the integers, n (n(0) less than or equal to n). The first is a continuous time process (Birth and Death Model or BDM) in which the probability of a transition to n + 1 or n - 1 is lambda k, with k = n - n(0) + 1 per unit time. The second is a discrete time model (Random Walk Model or RWM), in which a transition is made at each time step, either to n - 1 or to n + 1. In each case the walks start at length n(0), with new walks being generated at a steady rate, S, the source rate, determined by a base substitution rate of mutation from neighboring sequences. Each walk terminates whenever n reaches n(0) - 1 or at some time, T, which reflects the contamination of pure repeat sequences by other mutations that remove them from consideration, either because they fail to satisfy the criteria for repeat selection from some database or because they can no longer undergo efficient length mutations. For infinite T, the results are particularly simple for N(k), the expected number of repeats of length n = k + n(0) - 1, being, for BDM, N(k)= S/k lambda, and for RWM, N(k)= 2S. In each case, there is a cut-off value of k for finite T, namely k = T lambda. ln2 for BDM and k = 0.57 root T for RWM; for larger values of k, N(k) becomes rapidly smaller than the infinite time limit. We argue that these results may be compared with SSR length distributions averaged over many loci, but not for a particular locus, for which founder effects are important. For the data of Beckmann & Weber [(1992), Genomics 12, 627] on GT . AC repeats in the human, each model gives a reasonable fit to the data, with the source at two repeat units (n(0) = 2). Both the absolute number of loci and their length distribution are well represented.
RP Bell, GI (reprint author), LOS ALAMOS NATL LAB,MS K710,LOS ALAMOS,NM 87545, USA.
NR 41
TC 18
Z9 18
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0097-8485
J9 COMPUT CHEM
JI Comput. Chem.
PD MAR
PY 1996
VL 20
IS 1
BP 41
EP 48
DI 10.1016/S0097-8485(96)80006-4
PG 8
WC Chemistry, Multidisciplinary; Computer Science, Interdisciplinary
Applications
SC Chemistry; Computer Science
GA UA220
UT WOS:A1996UA22000005
PM 8867840
ER
PT J
AU Fickett, JW
AF Fickett, JW
TI The gene identification problem: An overview for developers
SO COMPUTERS & CHEMISTRY
LA English
DT Review
ID PROTEIN-CODING REGIONS; EXPRESSED SEQUENCE TAGS; MESSENGER-RNA
SEQUENCES; EXON-INTRON STRUCTURE; YEAST CHROMOSOME-III; OPEN READING
FRAMES; DNA-SEQUENCES; NEURAL NETWORKS; PROMOTER SEQUENCES; SPLICE
JUNCTIONS
AB The gene identification problem is the problem of interpreting nucleotide sequences by computer, in order to provide tentative annotation on the location, structure, and functional class of protein-coding genes. This problem is of self-evident importance, and is far from being fully solved, particularly for higher eukaryotes. Thus it is not surprising that the number of algorithm and software developers working in the area is rapidly increasing. The present paper is an overview of the field, with an emphasis on eukaryotes, for such developers.
RP LOS ALAMOS NATL LAB, THEORET BIOL & BIOPHYS GRP, MS K710, LOS ALAMOS, NM 87545 USA.
NR 143
TC 93
Z9 102
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0097-8485
J9 COMPUT CHEM
JI Comput. Chem.
PD MAR
PY 1996
VL 20
IS 1
BP 103
EP 118
DI 10.1016/S0097-8485(96)80012-X
PG 16
WC Chemistry, Multidisciplinary; Computer Science, Interdisciplinary
Applications
SC Chemistry; Computer Science
GA UA220
UT WOS:A1996UA22000011
PM 16749184
ER
PT J
AU Matis, S
Xu, Y
Shah, M
Guan, XJ
Einstein, JR
Mural, R
Uberbacher, E
AF Matis, S
Xu, Y
Shah, M
Guan, XJ
Einstein, JR
Mural, R
Uberbacher, E
TI Detection of RNA polymerase II promoters and polyadenylation sites in
human DNA sequence
SO COMPUTERS & CHEMISTRY
LA English
DT Article
ID TRANSCRIPTION INITIATION; BINDING
AB Detection of RNA polymerase II promoters and polyadenylation sites helps to locate gene boundaries and can enhance accurate gene recognition and modeling in genomic DNA sequence. We describe a system which can be used to detect polyadenylation sites and thus delineate the 3' boundary of a gene, and discuss improvements to a system first described in Matis et al. (1995) [Matis S., Shah M., Mural R. J. & Uberbacher E. C. (1995) Proc. First Wrld Conf: Computat. Med., Public Hlth, Biotechnol. (Wrld Sci.) (in press).], which predicts a large subset of RNA polymerase II promoters. The promoter system used statistical matrices and distance information as inputs for a neural network which was trained to provide initial promoter recognition. The output of the network was further refined by applying rules which use the gene context information predicted by GRAIL. We have reconstructed the rule-based system which uses gene context information and significantly improved the sensitivity and selectivity of promoter detection.
C1 OAK RIDGE NATL LAB,DIV BIOL,OAK RIDGE,TN 37831.
RP Matis, S (reprint author), OAK RIDGE NATL LAB,DIV COMP SCI & MATH,INFORMAT GRP,OAK RIDGE,TN 37831, USA.
NR 16
TC 18
Z9 18
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0097-8485
J9 COMPUT CHEM
JI Comput. Chem.
PD MAR
PY 1996
VL 20
IS 1
BP 135
EP 140
DI 10.1016/S0097-8485(96)80015-5
PG 6
WC Chemistry, Multidisciplinary; Computer Science, Interdisciplinary
Applications
SC Chemistry; Computer Science
GA UA220
UT WOS:A1996UA22000014
PM 8867844
ER
PT J
AU Gunzburger, MD
Hiromoto, RE
Mundt, MO
AF Gunzburger, MD
Hiromoto, RE
Mundt, MO
TI Analysis of a Monte Carlo boundary propagation method
SO COMPUTERS & MATHEMATICS WITH APPLICATIONS
LA English
DT Article
DE Monte Carlo methods; boundary value problems
AB A modified Monte Carlo technique, first developed in estimating a solution to Poisson's equation, is described and estimates of its computational complexities are derived. The method yields better estimates than the standard Monte Carlo approach by incorporating boundary information more efficiently and by the implicit reuse of random walk information gathered throughout the course of the computation. The new approach reduces the computational complexity of the length of a random walk by one order of magnitude as compared to a standard method described in many text books. Also, the number of walks necessary to achieve a desired accuracy is reduced.
C1 UNIV TEXAS SAN ANTONIO, SAN ANTONIO, TX 78249 USA.
LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87545 USA.
RP Gunzburger, MD (reprint author), VIRGINIA TECH, INTERDISCIPLINARY CTR APPL MATH, BLACKSBURG, VA 24061 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0898-1221
EI 1873-7668
J9 COMPUT MATH APPL
JI Comput. Math. Appl.
PD MAR
PY 1996
VL 31
IS 6
BP 61
EP 70
DI 10.1016/0898-1221(96)00006-5
PG 10
WC Mathematics, Applied
SC Mathematics
GA TV624
UT WOS:A1996TV62400006
ER
PT J
AU Isaacs, HS
Aldykiewicz, AJ
Thierry, D
Simpson, TC
AF Isaacs, HS
Aldykiewicz, AJ
Thierry, D
Simpson, TC
TI Measurements of corrosion at defects in painted zinc and zinc alloy
coated steels using current density mapping
SO CORROSION
LA English
DT Article
DE alloying; aluminum chloride; coatings; current density; defects;
galvanic couple; mapping; sulfate; temperature; zinc
AB Current density mapping was used to locate and monitor the early stages of corrosion at defects on painted surfaces in solution. Principles of the technique and methods of analysis were reviewed, and the effects of different scribing techniques were investigated. Results for painted zinc and aluminum-zinc alloy coated steel surfaces showed corrosion occurred initially at localized sites on the exposed zinc in both dilute chloride and sulfate solutions and when zinc was galvanically coupled to or isolated from steel. Current density mapping was shown to locate corrosion-susceptible defects on painted roll-formed materials that were not readily discernible optically.
C1 SUNY STONY BROOK,DEPT MAT SCI & ENGN,STONY BROOK,NY 11723.
SWEDISH CORROS INST,S-10405 STOCKHOLM,SWEDEN.
BETHLEHEM STEEL CORP,HOMER RES LABS,BETHLEHEM,PA 18016.
RP Isaacs, HS (reprint author), BROOKHAVEN NATL LAB,DEPT MAT SCI,UPTON,NY 11973, USA.
NR 7
TC 37
Z9 38
U1 0
U2 6
PU NATL ASSN CORROSION ENG
PI HOUSTON
PA 1440 SOUTH CREEK DRIVE, HOUSTON, TX 77084-4906
SN 0010-9312
J9 CORROSION
JI Corrosion
PD MAR
PY 1996
VL 52
IS 3
BP 163
EP 168
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA TY348
UT WOS:A1996TY34800001
ER
PT J
AU Wullschleger, SD
Sanderson, MA
McLaughlin, SB
Biradar, DP
Rayburn, AL
AF Wullschleger, SD
Sanderson, MA
McLaughlin, SB
Biradar, DP
Rayburn, AL
TI Photosynthetic rates and ploidy levels among populations of switchgrass
SO CROP SCIENCE
LA English
DT Article
ID RIBULOSE BISPHOSPHATE CARBOXYLASE; WATER-USE EFFICIENCY; LEAF
GAS-EXCHANGE; ZEA-MAYS-L; PANICUM-VIRGATUM; ANDROPOGON-GERARDII; TALL
FESCUE; TALLGRASS PRAIRIE; CARBON-DIOXIDE; FLOW-CYTOMETRY
AB Photosynthetic rates reportedly increase with increasing ploidy levels among lowland and upland ecotypes of switchgrass (Panicum virgatum L.). Such reports are based on data derived from native plant materials and no investigation has tested whether a similar relationship exists among released or experimental populations. A series of studies were conducted to address this question, with rates of photosynthesis measured with an infrared gas analyzer and ploidy levels estimated with flow cytometric analysis of nuclear DNA contents. Analyses of nuclei isolated from young stems and stained with propidium iodide indicated that of the 14 populations examined, eight are tetraploids ('Alamo'(1), 'Kanlow', 'NC-116', 'NC-216', 'PMT-279', 'PMT-785', 'Stuart', and 'Wabasso') and six are hexaploids ('Blackwell', 'Caddo', 'Cave-in-Rock', 'Pathfinder', 'Shelter', and 'Trailblazer'). Twelve of these populations (not including NC-116 and NC-216) were grown in the greenhouse and photosynthetic rates measured on the youngest fully expanded leaf blade 40 to 45 d after germination. Rates of photosynthesis did not differ among populations or between tetraploids and hexaploids. Field studies at Knoxville, TN, Stephenville, TX, and Blacksburg, VA, did indicate, however, that tetraploids often had mean photosynthetic rates 12 to 18% higher than those of hexaploids. These differences were observed at many field sites during May, June, and July, yet based on repeated sampling at Knoxville, rates of leaf photosynthesis measured in September were up to 6.5 mu mol CO2 m(-2) s(-1) higher in hexaploid compared with tetraploid populations. Contrary to earlier reports that photosynthetic rates increase with increasing ploidy level, our results indicate that such a relationship is not consistent for tetraploid and hexaploid populations of switchgrass but rather may change with season or environmental stress.
C1 TEXAS A&M UNIV,CTR AGR RES & EXTENS,STEPHENVILLE,TX 76401.
UNIV ILLINOIS,DEPT AGRON,URBANA,IL 61801.
RP Wullschleger, SD (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA.
RI Wullschleger, Stan/B-8297-2012
OI Wullschleger, Stan/0000-0002-9869-0446
NR 45
TC 52
Z9 54
U1 2
U2 16
PU CROP SCIENCE SOC AMER
PI MADISON
PA 677 S SEGOE ROAD, MADISON, WI 53711
SN 0011-183X
J9 CROP SCI
JI Crop Sci.
PD MAR-APR
PY 1996
VL 36
IS 2
BP 306
EP 312
PG 7
WC Agronomy
SC Agriculture
GA UE903
UT WOS:A1996UE90300016
ER
PT J
AU Chipley, K
Viswanathan, S
Cooper, RH
AF Chipley, K
Viswanathan, S
Cooper, RH
TI Concurrent engineering and rapid prototyping for die casting
SO DIE CASTING ENGINEER
LA English
DT Article
RP Chipley, K (reprint author), LOCKHEED MARTIN ENERGY SYST INC,OAK RIDGE CTR MFG TECHNOL,OAK RIDGE,TN 37831, USA.
NR 3
TC 1
Z9 1
U1 0
U2 0
PU DIE CASTING ENGINEER
PI ROSEMONT
PA 9701 W HIGGINS RD, SUITE 880, ROSEMONT, IL 60018-4721
SN 0012-253X
J9 DIE CAST ENG
JI Die Cast. Eng.
PD MAR-APR
PY 1996
VL 40
IS 2
BP 18
EP &
PG 5
WC Engineering, Multidisciplinary; Metallurgy & Metallurgical Engineering
SC Engineering; Metallurgy & Metallurgical Engineering
GA UG495
UT WOS:A1996UG49500004
ER
PT J
AU Loehle, C
Li, BL
AF Loehle, C
Li, BL
TI Statistical properties of ecological and geologic fractals
SO ECOLOGICAL MODELLING
LA English
DT Article
DE geostatistics; fractal dimensions; sampling theory; spatial patterns
ID SURFACE-ROUGHNESS; TOPOGRAPHIC SURFACES; MULTISCALE SOURCES; SPATIAL
VARIATION; TALUS SLOPES; DIMENSION; GEOMETRY; PATTERNS; SOIL;
GEOMORPHOLOGY
AB To use fractal models for ecological and geologic data, the statistical properties of fractals need to be clarified. No sampling or estimation theory for fractals currently exists. Several concrete steps in this direction are taken here. First, the information fractal dimension is proposed as a new measure that is relatively robust with respect to sampling error and can handle intensive data. The information fractal is tested with field data and is shown to be capable of delineating stratified structures and defining the scale of heterogeneity in the data. Comparison to semivariance analysis reveals the superiority of the fractal model for sample data that are nonisotropic and nonstationary. It is argued that approaches using regression to estimate fractal dimensions of spatial patterns are statistically invalid, and alternatives are proposed. Sampling of natural objects with transects (e.g., wells) is explored. For nonisotropic media (or maps), random placement of transects is shown to give an unreliable estimate of pattern. For transects taken perpendicular to a directional pattern (i.e., strata), it is shown that the mean of multiple estimates of the multiscale fractal dimensional profile does converge to the true value. Other sampling issues are addressed.
C1 TEXAS A&M UNIV,DEPT IND ENGN,CTR BIOSYST MODELLING,COLLEGE STN,TX 77843.
RP Loehle, C (reprint author), ARGONNE NATL LAB,DIV ENVIRONM RES,BLDG 203,ROOM E-149,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 81
TC 28
Z9 34
U1 2
U2 11
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3800
J9 ECOL MODEL
JI Ecol. Model.
PD MAR
PY 1996
VL 85
IS 2-3
BP 271
EP 284
DI 10.1016/0304-3800(94)00177-4
PG 14
WC Ecology
SC Environmental Sciences & Ecology
GA TY932
UT WOS:A1996TY93200015
ER
PT J
AU Li, BL
Loehle, C
Malon, D
AF Li, BL
Loehle, C
Malon, D
TI Microbial transport through heterogeneous porous media: Random walk,
fractal, and percolation approaches
SO ECOLOGICAL MODELLING
LA English
DT Article
DE advection-dispersion equation; fractal geometry; heterogeneity;
microorganisms; percolation theory; random walks; soil ecosystems
ID CONTAMINANT TRANSPORT; SOLUTE TRANSPORT; HYDRAULIC CONDUCTIVITY;
INVASION PERCOLATION; MODEL; GROUNDWATER; SCALE; FLOW; DIFFUSION;
BACTERIA
AB Interest in microbial communities of the subsurface environment has greatly stimulated research on microbial transport phenomena in heterogeneous porous media. In this paper, we describe several stochastic-geometric modeling techniques that integrate, to varying degrees, random walk, fractal, and percolation approaches as alternatives to traditional mathematical and numerical models for microbial transport in subsurface media across scales. The results presented illustrate how such techniques may shed new light on modeling of microbial transport processes, including microbial cell diffusion on a fractal space, geometric properties of microbial clusters (patches), aggregation processes of microbial clusters, localization of microbial growth sites, and a model for long-term survival of microbial cells in deep strata.
C1 ARGONNE NATL LAB, DIV ENVIRONM RES, ARGONNE, IL 60439 USA.
ARGONNE NATL LAB, DECIS & INFORMAT SCI DIV, ARGONNE, IL 60439 USA.
RP Li, BL (reprint author), TEXAS A&M UNIV, DEPT IND ENGN, CTR BIOSYST MODELLING, COLLEGE STN, TX 77843 USA.
NR 85
TC 28
Z9 31
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3800
J9 ECOL MODEL
JI Ecol. Model.
PD MAR
PY 1996
VL 85
IS 2-3
BP 285
EP 302
DI 10.1016/0304-3800(94)00198-7
PG 18
WC Ecology
SC Environmental Sciences & Ecology
GA TY932
UT WOS:A1996TY93200016
ER
PT J
AU Rice, CD
Kergosien, DH
Adams, SM
AF Rice, CD
Kergosien, DH
Adams, SM
TI Innate immune function as a bioindicator of pollution stress in fish
SO ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
LA English
DT Article
ID CHEMI-LUMINESCENT RESPONSE; CONTAMINATED STREAM; TOXIC-CHEMICALS;
MACROPHAGES
AB Immunotoxicological studies, based on processing of samples in the field and laboratory, were conducted on fish collected from a stream receiving point-source contaminants near its headwaters. Previous studies in this stream have revealed that cytochrome P4501A activity, liver somatic indices, macrophage aggregates, and parasitic liver lesions are significantly elevated in sunfish with the degree of impact decreasing with distance from the contaminant source, Fish collected from each sampling site were equally divided, One group was sacrificed in the field and the spleen and anterior kidney tissues were removed and placed in buffer on ice. The other group was kept in MS-222 for 2 hr and transported to the laboratory for processing. The spleen and anterior kidney from each fish were then prepared as a single cell suspension and shipped overnight to Mississippi State University. Cells were then evaluated for PMA-stimulated phagocyte oxidative burst and nonspecific cytotoxic cell (NCC) activity against K562 tumor targets. Oxidative burst responses were dramatically suppressed in both groups at sampling sites near the headwaters but returned to reference levels further downstream. There were no differences between processing strategies at each station. NCC activities did not follow gradient-response patterns observed with phagocyte oxidative burst data and there were inconsistent differences between processing strategies at each site. These data indicate that simple immune function assays, such as phagocyte oxidative burst responses, can be used as a ancillary bioindicator in fish health monitoring and that immune function in these fish can be reliably assessed even if samples are not immediately processed. (C) 1996 Academic Press, Inc.
C1 OAK RIDGE NATL LAB, DIV ENVIRONM SCI, OAK RIDGE, TN 37830 USA.
RP Rice, CD (reprint author), MISSISSIPPI STATE UNIV, COLL VET MED, CTR ENVIRONM HLTH SCI, POB 9825, MISSISSIPPI STATE, MS 39762 USA.
NR 35
TC 33
Z9 36
U1 2
U2 9
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0147-6513
J9 ECOTOX ENVIRON SAFE
JI Ecotox. Environ. Safe.
PD MAR
PY 1996
VL 33
IS 2
BP 186
EP 192
DI 10.1006/eesa.1996.0024
PG 7
WC Environmental Sciences; Toxicology
SC Environmental Sciences & Ecology; Toxicology
GA UJ172
UT WOS:A1996UJ17200012
PM 8723757
ER
PT J
AU Theiler, J
Rapp, PE
AF Theiler, J
Rapp, PE
TI Re-examination of the evidence for low-dimensional, nonlinear structure
in the human electroencephalogram
SO ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY
LA English
DT Article
DE EEG; dimension; chaos; surrogate data; nonlinear dynamics; discriminant
analysis; spectral analysis
ID CHAOTIC TIME-SERIES; DETERMINISTIC CHAOS; ALPHA-POWER; BRAIN; SYSTEMS;
ATTRACTORS; STATE; RECONSTRUCTION; SCHIZOPHRENICS; DIAGNOSIS
AB We have re-examined single channel EEG data obtained from normal human subjects. In the original analysis, calculation of the correlation dimension with the Grassbeger-Procaccia algorithm produced results consistent with an interpretation of low-dimensional behavior. The re-examination suggests that the previous indication of low-dimensional structure was an artifact of autocorrelation in the oversampled signal. Calculations with a variant of the Grassberger-Procaccia algorithm modified to be less sensitive to autocorrelations, and comparison with linear gaussian surrogate data, indicate that these data may be more appropriately modeled by linearly filtered noise. Discriminant analysis further indicates that the correlation dimension is a poor discriminator for distinguishing between EEGs recorded at rest and during periods of cognitive activity.
It remains possible that the application of other nonlinear measures or the examination of multichannel EEG data may resolve structures not found in these calculations.
C1 MED COLL PENN & HAHEMANN UNIV, DEPT PHYSIOL, PHILADELPHIA, PA 19129 USA.
SANTA FE INST, SANTA FE, NM 87501 USA.
LOS ALAMOS NATL LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA.
LOS ALAMOS NATL LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA.
FU NINDS NIH HHS [NS32983, NS19716]
NR 70
TC 243
Z9 253
U1 0
U2 16
PU ELSEVIER IRELAND LTD
PI CLARE
PA ELSEVIER HOUSE, BROOKVALE PLAZA, EAST PARK SHANNON, CO, CLARE, 00000,
IRELAND
SN 0013-4694
J9 ELECTROEN CLIN NEURO
JI Electroencephalogr. Clin. Neurophysiol.
PD MAR
PY 1996
VL 98
IS 3
BP 213
EP 222
DI 10.1016/0013-4694(95)00240-5
PG 10
WC Engineering, Biomedical; Clinical Neurology
SC Engineering; Neurosciences & Neurology
GA UF908
UT WOS:A1996UF90800005
PM 8631281
ER
PT J
AU Pletta, B
AF Pletta, B
TI War machine that won't stop
SO ELECTRONICS WORLD
LA English
DT Editorial Material
RP Pletta, B (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU REED BUSINESS PUBLISHING LTD
PI SUTTON
PA QUADRANT HOUSE THE QUADRANT, SUTTON, SURREY, ENGLAND SM2 5AS
SN 0959-8332
J9 ELECTRON WORLD
JI Electron. World
PD MAR
PY 1996
IS 1720
BP 188
EP 188
PG 1
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA UD354
UT WOS:A1996UD35400016
ER
PT J
AU Dayton, DC
Chum, HL
AF Dayton, DC
Chum, HL
TI Symposium on biomass fuels: An introduction
SO ENERGY & FUELS
LA English
DT Editorial Material
RP Dayton, DC (reprint author), NATL RENEWABLE ENERGY LAB,IND TECHNOL DIV,1617 COLE BLVD,GOLDEN,CO 80401, USA.
NR 0
TC 5
Z9 5
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 MAR-APR
PY 1996
VL 10
IS 2
BP 267
EP 268
DI 10.1021/ef960008n
PG 2
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB574
UT WOS:A1996UB57400001
ER
PT J
AU Dayton, DC
Frederick, WJ
AF Dayton, DC
Frederick, WJ
TI Direct observation of alkali vapor release during biomass combustion and
gasification .2. Black liquor combustion at 1100 degrees C
SO ENERGY & FUELS
LA English
DT Article; Proceedings Paper
CT 210TH American-Chemical-Society National Meeting
CY AUG 21-22, 1995
CL CHICAGO, IL
SP Amer Chem Soc
ID MOLECULAR CHARACTERIZATION; SODIUM EMISSION; PYROLYSIS
AB This study details the first application of molecular beam mass spectrometry to investigate the release of sodium, potassium, sulfur, and chlorine during black liquor combustion, Two samples, black liquor with 37.1% dry solids and a sample of dry black liquor solids, were combusted in a quartz-tube reactor at 1100 degrees C in 5% O-2 in helium, The gaseous black liquor combustion products, including alkali metal salts, were monitored continuously and in real time during the combustion event with a molecular beam mass spectrometer (MBMS). Combustion of the dry black liquor solids occurred in multiple phases distinguished as a devolatilization phase and a char combustion phase that was arbitrarily divided into three separate phases, Combustion of the wet black liquor samples occurred in two phases, namely, a combination of water evaporation and devolatilization, and char combustion, NaCl was the most abundant gas-phase alkali-metal-containing species measured during black liquor combustion, The experimental results showed evidence that gas-phase NaOH was also formed during combustion of both black liquor samples. In addition, gas-phase Na2SO4 was observed during combustion of the dry black liquor solids.
C1 OREGON STATE UNIV,DEPT CHEM ENGN,CORVALLIS,OR 97331.
RP Dayton, DC (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA.
NR 21
TC 29
Z9 29
U1 0
U2 7
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD MAR-APR
PY 1996
VL 10
IS 2
BP 284
EP 292
DI 10.1021/ef950210a
PG 9
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB574
UT WOS:A1996UB57400004
ER
PT J
AU Agblevor, FA
Besler, S
AF Agblevor, FA
Besler, S
TI Inorganic compounds in biomass feedstocks .1. Effect on the quality of
fast pyrolysis oils
SO ENERGY & FUELS
LA English
DT Article; Proceedings Paper
CT 210TH American-Chemical-Society National Meeting
CY AUG 21-22, 1995
CL CHICAGO, IL
SP Amer Chem Soc
ID WOOD
AB Inorganic compounds-especially potassium, calcium, sodium, silicon, phosphorus, and chlorine-are the main constituents of the ash in biomass feedstocks. The concentrations of ash range from less than 1% in softwoods to 15% in herbaceous biomass and agricultural residues. During biomass pyrolysis, these inorganics, especially potassium and calcium, catalyze biomass decomposition and char-forming reactions. Chars formed during these reactions invariably end up in the biomass pyrolysis oils (biocrude oils) as suspended submicron particles. The presence of high concentrations of submicron char particles in biocrude oils will make them problematic for combustion in steam boilers, diesel engines, and turbine operations because of the potential release of the ash and alkali metals during combustion. We experimented with sequential cold filtering of biocrude oils using filters of varying pore size and this revealed that most of the ash and alkali metals detected in biocrude oils are trapped in the chars. Leaching studies conducted on the chars suspended in the oils showed no leaching of alkali metals from the chars into the oils. Cold filtration of the oils dissolved in acetone was ineffective in reducing the alkali metals content to acceptable levels, but hot gas filtration of the pyrolysis vapors reduced the alkali metals content below 10 ppm. Our data suggest that hot gas filtration can potentially reduce the ash and alkali metals content of the biocrude oils to acceptable levels so they can be used as turbine, diesel engine, or boiler fuels.
RP Agblevor, FA (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA.
NR 19
TC 104
Z9 112
U1 3
U2 32
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD MAR-APR
PY 1996
VL 10
IS 2
BP 293
EP 298
DI 10.1021/ef950202u
PG 6
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB574
UT WOS:A1996UB57400005
ER
PT J
AU Oh, CH
Kochan, RJ
Charlton, TR
Bourhis, AL
AF Oh, CH
Kochan, RJ
Charlton, TR
Bourhis, AL
TI Thermal-hydraulic modeling of supercritical water oxidation of ethanol
SO ENERGY & FUELS
LA English
DT Article
ID MIXTURES
AB Supercritical water oxidation (SCWO), a promising technology to treat hazardous organic wastes, is capable of organic destruction efficiencies in excess of 99.9% at operating conditions of 620 degrees C and 234.4 bar. Under these conditions, organic compounds are completely miscible with supercritical water, oxygen, and nitrogen and oxidize rapidly to carbon dioxide and water. The reactor is central to the SCWO process. Many reactor designs have been proposed, patented, and tested at both bench and pilot scales. Commercial operation will require that these systems be scaled up by a factor of 10-100 times. Successful scale-up of this magnitude will be facilitated by creating numerical reactor models, validating these models against the available data, and then using the models to simulate the larger reactor's performance. This paper presents the initial steps in modeling a SCWO reactor using a commercially available computational fluid dynamics (CFD) package. The results of this CFD model are compared with test data from a bench scale SCWO vessel reactor built and tested by MODAR, Inc. The calculations and test data presented in this paper are for the supercritical oxidation of ethanol. These results show good agreement with the limited experimental data available, Additional modeling with pilot-scale test data is planned.
C1 MODAR INC,NATICK,MA 01760.
RP Oh, CH (reprint author), LOCKHEED MARTIN IDAHO TECHNOL,IDAHO NATL ENGN LAB,2525 FREMONT AVE,IDAHO FALLS,ID 83415, USA.
NR 19
TC 39
Z9 41
U1 0
U2 13
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD MAR-APR
PY 1996
VL 10
IS 2
BP 326
EP 332
DI 10.1021/ef9500393
PG 7
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB574
UT WOS:A1996UB57400008
ER
PT J
AU Erdmann, K
Mohan, T
Verkade, JG
AF Erdmann, K
Mohan, T
Verkade, JG
TI HPLC and P-31 NMR analysis of phenols in coal liquefaction oils
SO ENERGY & FUELS
LA English
DT Article
ID PHASE LIQUID-CHROMATOGRAPHY; LABILE HYDROGEN; MOBILE-PHASE; DEAD-VOLUME;
SPECTROSCOPIC ANALYSIS; ION-EXCHANGE; SEPARATION; RETENTION;
IDENTIFICATION; ALKYLPHENOLS
AB Two Illinois No. 6 coal liquids (SOH and ASOH) were separated into polar and non-polar fractions and the polar fractions were analyzed to identify the phenols by RP HPLC in tandem with P-31 NMR spectroscopy of samples derivatized with ClPOCMe(2)CMe(2)O (1). The results obtained from both methods complement one another quite well despite numerous cases of more than one phenol displaying equal retention times or the same P-31 chemical shift when derivatized with 1. The total amount of phenolic oxygen was quantitatively determined by P-31 NMR spectroscopy for both coal liquids. The results agree very well with values reported by others by an FTIR method.
C1 IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011.
NR 39
TC 12
Z9 15
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 MAR-APR
PY 1996
VL 10
IS 2
BP 378
EP 385
DI 10.1021/ef950122q
PG 8
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB574
UT WOS:A1996UB57400015
ER
PT J
AU Wasserman, SR
Winans, RE
McBeth, R
AF Wasserman, SR
Winans, RE
McBeth, R
TI Iron species in argonne premium coal samples: An investigation using
x-ray absorption spectroscopy
SO ENERGY & FUELS
LA English
DT Article
ID SULFUR FORMS; PHOTOELECTRON-SPECTROSCOPY; PETROLEUM ASPHALTENES; HEAVY
PETROLEUM; MODEL COMPOUNDS; EDGE STRUCTURE; QUANTIFICATION; SPECTRA;
PROGRAM
AB Iron K-edge X-ray absorption spectroscopy (XAS) has been used to examine the iron species that are present within the Argonne Premium Coal Samples. This technique was applied to both native coal samples and ones which had been extracted with concentrated hydrochloric acid. The near-edge absorption spectra (XANES) were analyzed using a deconvolution procedure to determine the relative amounts of ore-ferrous, oxo-ferric, and pyritic environments in the coals. Three coals, Beulah-Zap, Wyodak-Anderson, and Lewiston-Stockton, apparently contain significant amounts of ferric species. Extended X-ray absorption fine structure (EXAFS) spectra were used to confirm the pyritic contents that were deduced from the near-edge spectra.
RP Wasserman, SR (reprint author), ARGONNE NATL LAB, DIV CHEM, 9700 S CASS AVE, ARGONNE, IL 60439 USA.
NR 35
TC 20
Z9 20
U1 2
U2 11
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 0887-0624
J9 ENERG FUEL
JI Energy Fuels
PD MAR-APR
PY 1996
VL 10
IS 2
BP 392
EP 400
DI 10.1021/ef950154d
PG 9
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB574
UT WOS:A1996UB57400017
ER
PT J
AU Yang, SY
Stock, LM
AF Yang, SY
Stock, LM
TI Base-activated reduction of aromatic compounds with dihydrogen
SO ENERGY & FUELS
LA English
DT Article
ID GAS-PHASE
C1 UNIV CHICAGO,DEPT CHEM,CHICAGO,IL 60637.
ARGONNE NATL LAB,DIV CHEM,ARGONNE,IL 60439.
NR 10
TC 2
Z9 2
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 MAR-APR
PY 1996
VL 10
IS 2
BP 516
EP 517
DI 10.1021/ef9502259
PG 2
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB574
UT WOS:A1996UB57400034
ER
PT J
AU Belzer, DB
Scott, MJ
Sands, RD
AF Belzer, DB
Scott, MJ
Sands, RD
TI Climate change impacts on US commercial building energy consumption: An
analysis using sample survey data
SO ENERGY SOURCES
LA English
DT Article
DE climate change; commercial buildings; energy consumption; energy demand;
global warming; United States
AB Although much of the commercial sector infrastructure for the next century is currently under construction or is in the planning stages, little has been done in communicating how potential global warming might change the energy consumption characteristics of the building stock. The research discussed in this article advances the literature on how climate change affects commercial sector energy demand systems. It projects the effects of climate change on commercial energy demand in the United States at the national level. The article relies heavily on time-series regressions of monthly energy consumption by building on monthly heating and cooling degree days. It provides empirical results for the effects of climate on a projected building stock in the year 2030 and examines the prospects for saving energy with advanced building designs in the context of potential global warming.
C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA.
NR 35
TC 43
Z9 45
U1 3
U2 6
PU TAYLOR & FRANCIS
PI BRISTOL
PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598
SN 0090-8312
J9 ENERG SOURCE
JI Energy Sources
PD MAR
PY 1996
VL 18
IS 2
BP 177
EP 201
DI 10.1080/00908319608908758
PG 25
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UD894
UT WOS:A1996UD89400006
ER
PT J
AU Schmoyer, RL
Beauchamp, JJ
Brandt, CC
Hoffman, FO
AF Schmoyer, RL
Beauchamp, JJ
Brandt, CC
Hoffman, FO
TI Difficulties with the lognormal model in mean estimation and testing
SO ENVIRONMENTAL AND ECOLOGICAL STATISTICS
LA English
DT Article
DE gamma distribution; left censoring; product limit estimate; risk
assessment; truncated normal distribution
ID CONFIDENCE-INTERVALS
AB A frequent assumption in environmental risk assessment is that the underlying distribution of an analyte concentration is lognormal. However, the distribution of a random variable whose log has a t-distribution has infinite mean. Because of the proximity of the standard normal and t-distribution, this suggests that a distribution such as the gamma or truncated normal, with smaller right tail probabilities, might make a better statistical model for mean estimation than the lognormal. In order to assess the effect of departures from lognormality on lognormal-based statistics, we simulated complete lognormal, truncated normal, and gamma data for various sample sizes and coefficients of variation. In these cases, departures from lognormality were not easily detected with the Shapiro-Wilk test. Various lognormal-based estimates and tests were compared with alternate methods based on the ordinary sample mean and standard error. The examples were also considered in the presence of random left censoring with the mean and standard error of the product limit estimate replacing the ordinary sample mean and standard error. The results suggest that in the estimation of or tests about a mean, if the assumption of lognormality is at all suspect, then lognormal-based approaches may not be as good as the alternative methods.
C1 SENES OAK RIDGE CTR RISK ANAL INC,OAK RIDGE,TN 37831.
RP Schmoyer, RL (reprint author), OAK RIDGE NATL LAB,DIV MATH & COMP SCI,POB 2008,OAK RIDGE,TN 37831, USA.
NR 18
TC 19
Z9 19
U1 0
U2 1
PU CHAPMAN HALL LTD
PI LONDON
PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN
SN 1352-8505
J9 ENVIRON ECOL STAT
JI Environ. Ecol. Stat.
PD MAR
PY 1996
VL 3
IS 1
BP 81
EP 97
DI 10.1007/BF00577325
PG 17
WC Environmental Sciences; Mathematics, Interdisciplinary Applications;
Statistics & Probability
SC Environmental Sciences & Ecology; Mathematics
GA VL948
UT WOS:A1996VL94800005
ER
PT J
AU Stevens, RG
Davis, S
AF Stevens, RG
Davis, S
TI The melatonin hypothesis: Electric power and breast cancer
SO ENVIRONMENTAL HEALTH PERSPECTIVES
LA English
DT Article
DE breast cancer; EMF; electric power; epidemiology
ID N-ACETYLTRANSFERASE ACTIVITY; MAGNETIC-FIELD; PINEAL-GLAND;
ELECTROMAGNETIC-FIELDS; MAMMARY CARCINOGENESIS; OCCUPATIONAL EXPOSURE;
VARYING PHOTOPERIODS; PLASMA MELATONIN; TUMOR PROMOTION; LIGHT
AB Breast cancer is a disease of modern life. As societies industrialize, risk increases, yet it is unclear which of the myriad changes coming with industrialization drives this increase. One important hallmark of modem life is the pervasive use of electric power. Electric power produces light at night (LAN) and electric and magnetic fields (EMF), either or both of which may alter pineal function and its primary hormone melatonin, thereby, perhaps increasing the risk of breast cancer. This hypothesis, stated a decade ago, is now receiving considerable experimental and epidemiological attention. The circumstantial case for the hypothesis has three aspects: light effects on melatonin, EMF effects on melatonin, and melatonin effects on breast cancer. The strongest of these aspects is the effects of light on melatonin. It is clear that the normal nocturnal melatonin rise in humans can be suppressed by light of sufficient intensity. The evidence for an effect of melatonin on breast cancer in experimental animals is strong, but the evidence in humans is scant and difficult to gather. The weakest aspect of the circumstantial case is EMF effects on melatonin. Whereas a half dozen independent laboratories have published findings of suppression in animals, there are inconsistencies, and there are no published data on humans. The direct evidence bearing on the hypothesis is sparse but provocative. Two laboratories have published data showing substantial increases in chemically induced breast cancer in rats by a weak AC (alternating current) magnetic field. The epidemiological evidence is very limited but has offered some support as well. An effect of electric power on breast cancer would have profound implications, and this possibility deserves continued investigation.
C1 UNIV WASHINGTON, FRED HUTCHINSON CANC RES CTR, SEATTLE, WA 98195 USA.
UNIV WASHINGTON, SCH PUBL HLTH & COMMUNITY MED, SEATTLE, WA 98195 USA.
RP Stevens, RG (reprint author), PACIFIC NW LAB, POB 999, 906 BATTELLE BLVD, RICHLAND, WA 99352 USA.
FU NCI NIH HHS [R01-CA55844]
NR 65
TC 138
Z9 141
U1 2
U2 11
PU NATL INST ENVIRON HEALTH SCI
PI RES TRIANGLE PK
PA PO BOX 12233, RES TRIANGLE PK, NC 27709
SN 0091-6765
J9 ENVIRON HEALTH PERSP
JI Environ. Health Perspect.
PD MAR
PY 1996
VL 104
SU 1
BP 135
EP 140
DI 10.2307/3432703
PG 6
WC Environmental Sciences; Public, Environmental & Occupational Health;
Toxicology
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Toxicology
GA UE548
UT WOS:A1996UE54800012
PM 8722117
ER
PT J
AU Mann, LK
Parr, PD
Pounds, LR
Graham, RL
AF Mann, LK
Parr, PD
Pounds, LR
Graham, RL
TI Protection of biota on nonpark public lands: Examples from the US
Department of Energy Oak Ridge Reservation
SO ENVIRONMENTAL MANAGEMENT
LA English
DT Article
DE federal lands; threatened and endangered species; conservation; cedar
barrens
ID PROGRAM; FOREST
AB Security buffers of Department of Defense (DoD) and Department of Energy (DOE) reservations provide long-term habitat protection for many rare and endangered species. The importance of these government-owned reservations as nationally valuable resources has been relatively unrecognized. During the last 50 years, the DOE Oak Ridge Reservation (ORR) has been a relatively protected island in a region of rapidly expanding urbanization and land clearing. Consisting of the Oak Ridge National Environmental Research Park and associated lands surrounding DOE facilities at Oak Ridge Tennessee, the unique nature of the ORR in the surrounding landscape is clearly visible from the air and has been documented using remote sensing data. Although forests dominate much of other regions of eastern Tennessee, this 15,000-ha tract of mostly natural forest habitat is unique in the southern Ridge and Valley physiographic province, which is otherwise widely developed for pasture, marginal cropland, woodlot, and urban uses. Twenty state-listed and federal-candidate plant species are known to be present on the ORR. This richness of species, which are provided protection by state and federal laws, exceeds that of the Great Smoky Mountains National Park on a species area basis and is an index of the value of the ORR both regionally and nationally in conserving biodiversity. With the end of the Cold War, changing DoD and DOE missions combined with increasing development pressure contribute to uncertainty in the future management of security reservations.
RP Mann, LK (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA.
NR 39
TC 15
Z9 16
U1 2
U2 6
PU SPRINGER VERLAG
PI NEW YORK
PA 175 FIFTH AVE, NEW YORK, NY 10010
SN 0364-152X
J9 ENVIRON MANAGE
JI Environ. Manage.
PD MAR-APR
PY 1996
VL 20
IS 2
BP 207
EP 218
DI 10.1007/BF01204005
PG 12
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA TZ628
UT WOS:A1996TZ62800005
ER
PT J
AU Geist, DR
Vail, LW
Epstein, DJ
AF Geist, DR
Vail, LW
Epstein, DJ
TI Analysis of potential impacts to resident fish from Columbia River
system operation alternatives
SO ENVIRONMENTAL MANAGEMENT
LA English
DT Article
DE resident fish; hydropower; analysis; reservoirs; models
AB The US Army Corps of Engineers, the US Bureau of Reclamation, and the Bonneville Power Administration initiated the Columbia River System Operation Review (SOR) in 1990. The SOR will assist agencies in comparing the benefits and risks to Columbia River uses and natural resources from alternative strategies for using Columbia River water. Focusing on 14 federal dams within the basin, the agencies are attempting to improve on the efficient and coordinated use of the Columbia River system. An initial screening of all potential strategies of reservoir operation was necessary to reduce the number of possibilities to a limited set for detailed analysis. To that end, the Resident Fish Work Group of the SOR developed spreadsheet models capable of assessing the impacts of different management strategies on resident fish at six storage reservoirs. The models include biological, physical, and hydrological relationships important to resident fish specific to each reservoir. Alternatives that kept the reservoirs near full pool and held stable during the growing season resulted in positive benefits to resident fish at all locations modeled. Conversely, alternatives designed to improve anadromous fish survival with increased instream flow generally had a negative impact on the resident fish in the reservoirs modeled. The models developed for resident fish in the screening analysis phase of the SOR were useful in assessing the relative impact to resident fish from a large number of alternatives. The Screening analysis demonstrated that future analytical efforts must consider trade-offs among river uses/resource groups, among reservoirs throughout the basin, and among resident fish species within a reservoir.
RP Geist, DR (reprint author), PACIFIC NW LAB, DIV ENVIRONM TECHNOL, POB 999, MS K6-85, RICHLAND, WA 99352 USA.
NR 14
TC 4
Z9 4
U1 0
U2 2
PU SPRINGER VERLAG
PI NEW YORK
PA 175 FIFTH AVE, NEW YORK, NY 10010
SN 0364-152X
J9 ENVIRON MANAGE
JI Environ. Manage.
PD MAR-APR
PY 1996
VL 20
IS 2
BP 275
EP 288
DI 10.1007/BF01204012
PG 14
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA TZ628
UT WOS:A1996TZ62800012
ER
PT J
AU Peterson, MJ
Southworth, GR
Crumby, WD
AF Peterson, MJ
Southworth, GR
Crumby, WD
TI Monitoring mercury in fish in a stream system receiving multiple
industrial inputs
SO ENVIRONMENTAL MONITORING AND ASSESSMENT
LA English
DT Article
ID YELLOW PERCH; METHYLMERCURY; LAKES
AB Sunfish and a minnow species were used as indicators of anthropogenic mercury contamination in an east Tennessee stream system receiving multiple point and non-point discharges. The monitoring of bluegill (Lepomis macrochirus) and redbreast sunfish (Lepomis auritus) identified bioavailable mercury near three geographically separate industrial facilities, and was able to detect decreases in contamination with distance away from these facilities. In general, total mercury concentrations in the tissue of sunfish in this study were low in comparison to the most commonly cited human health threshold limits, although concentrations at some sites exceeded 1 mu g/g. Caged blacknose dace (Rhinichthys atratulus) were monitored in conjunction with resident fish as an indicator of more discrete sources in selected headwater streams where fish movement was deemed a potential factor affecting mercury body burdens. Mercury concentrations in muscle tissue of caged dace after 12 weeks exposure were generally low (<0.2 mu g/g) at all sites but higher than in fish from reference streams. mercury accumulation varied between species (sunfish vs. dace) and monitoring method (caged vs. resident) at the same site, with sunfish tending to accumulate higher concentrations of mercury than resident dace which, in turn, contained about twofold higher concentrations than caged dace. However, the site-to-site pattern of mercury accumulation was similar. This study demonstrates the utility of using small stream dwelling fish with restricted home ranges as a tool for identifying and evaluating the bioavailability of mercury sources in large industrial or urbanized settings.
RP Peterson, MJ (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,POB 2008,OAK RIDGE,TN 37831, USA.
NR 41
TC 12
Z9 12
U1 3
U2 13
PU KLUWER ACADEMIC PUBL
PI DORDRECHT
PA SPUIBOULEVARD 50, PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS
SN 0167-6369
J9 ENVIRON MONIT ASSESS
JI Environ. Monit. Assess.
PD MAR
PY 1996
VL 40
IS 1
BP 91
EP 105
DI 10.1007/BF00395169
PG 15
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA TZ520
UT WOS:A1996TZ52000006
PM 24198073
ER
PT J
AU Chang, LY
AF Chang, LY
TI An industrial wastewater pollution prevention study: Evaluation of
precipitation and separation processes
SO ENVIRONMENTAL PROGRESS
LA English
DT Article
ID MINIMIZATION
AB A water pollution prevention study was performed for two plating processes at Lawrence Berkeley National Laboratory (LBNL). This study included wastewater precipitation process analysis, and evaluation of separation and recycling alternatives. One of the pollution prevention opportunity assessment goals is to reduce and reuse wastewater.
From a review of coordination chemistry and a series of precipitation process tests, it was found that treatment with optimized pH and mixing rate, proper coprecipitants (such as iron salts), and chemical dosages were needed to dissociate metal ions from the complexes in the wastewater. In this study, reverse osmosis and ion exchange technologies were also evaluated. A water reclamation analysis with these two technologies was implemented. The analysis projected, that with recycling systems, 33% of the wastewater could be reclaimed.
RP Chang, LY (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA.
NR 23
TC 13
Z9 14
U1 0
U2 1
PU AMER INST CHEMICAL ENGINEERS
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017
SN 0278-4491
J9 ENVIRON PROG
JI Environ. Prog.
PD SPR
PY 1996
VL 15
IS 1
BP 28
EP 37
DI 10.1002/ep.670150116
PG 10
WC Engineering, Environmental; Engineering, Chemical; Environmental
Sciences
SC Engineering; Environmental Sciences & Ecology
GA UD771
UT WOS:A1996UD77100008
ER
PT J
AU Bolton, H
Girvin, DC
Plymale, AE
Harvey, SD
Workman, DJ
AF Bolton, H
Girvin, DC
Plymale, AE
Harvey, SD
Workman, DJ
TI Degradation of metal-nitrilotriacetate complexes by Chelatobacter
heintzii
SO ENVIRONMENTAL SCIENCE & TECHNOLOGY
LA English
DT Article
ID LIQUID-CHROMATOGRAPHY; NTA; BACTERIA; ACID; BIODEGRADATION; ADAPTATION;
METABOLISM; COLUMN; WATER
AB Nitrilotriacetic acid (NTA) is a synthetic chelating agent that can form strong water-soluble complexes with a wide range of radionuclide and metal ions and has been used to decontaminate nuclear reactors and in the processing of nuclear materials. The codisposal of NTA or other synthetic chelating agents with radionuclides may result in increased dispersal of radionuclides in soil and subsurface environments. Understanding the influence of aqueous geochemistry on NTA degradation is essential to predict the mobility and fate of inorganic contaminant-NTA complexes in the subsurface. Chelatobacter heintzii (ATCC 29600) was shown to degrade C-14-labeled NTA to (CO2)-C-14 with first-order kinetics at concentrations ranging from 0.05 to 5.23 mu M (0.01-1 mu g of NTA mL(-1)). The degradation of various metal-NTA complexes was investigated under conditions in which the NTA was predominantly present as the metal-NTA complex. The order for the rates of degradation was HNTA(2-) > CoNTA(-) = FeOHNTA(-) = ZnNTA(-) > AIOHNTA(-) > CuNTA(-) > NiNTA(-), which is not related to the order of metal-NTA stability constants. The metal concentration used was not inhibitory to glucose mineralization, suggesting that toxicity of the chelated metal was not responsible for the differences in the rates of NTA degradation. After degradation of CoNTA(-) and NiNTA(-), <3% of the Co or Ni was associated with C. heintzii cells. This indicates that, after degradation of the metal-NTA complex, metal ions will be predominantly present in the aqueous phase. The degradability of the various metal-NTA complexes was not related to their thermodynamic stability constants, but was related to the lability of the various metal-NTA complexes or the relative rates of formation of HNTA(2-).
C1 PACIFIC NW LAB, INTERFAC GEOCHEM GRP, RICHLAND, WA 99352 USA.
PACIFIC NW LAB, DEPT CHEM SCI, RICHLAND, WA 99352 USA.
RP Bolton, H (reprint author), PACIFIC NW LAB, ENVIRONM MICROBIOL GRP, 900 BATTELLE BLVD, RICHLAND, WA 99352 USA.
RI Bolton, Harvey/E-5583-2011
NR 58
TC 59
Z9 59
U1 1
U2 7
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 MAR
PY 1996
VL 30
IS 3
BP 931
EP 938
PG 8
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA TX751
UT WOS:A1996TX75100048
ER
PT J
AU Newman, MC
McCloskey, JT
AF Newman, MC
McCloskey, JT
TI Predicting relative toxicity and interactions of divalent metal ions:
Microtox(R) bioluminescence assay
SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
LA English
DT Article
DE metal; toxicity; bioactivity; Microtox(R); bacteria
ID HEAVY-METALS; WATER; BINDING; ALGAE
AB Both relative toxicity and interactions between paired metal ions were predicted with least-squares linear regression and various ion characteristics. Microtox(R) 15 min EC50s (expressed as free ion) for Ca(II), Cd(II), Cu(II), Hg(II), Mg(II), Mn(II), Ni(II), Pb(II), and Zn(II) were most effectively modeled with the constant for the first hydrolysis (K-H for M(n+) + H2O --> MOH(n-1) + H+) although other ion characteristics were also significant in regression models. The \log K-H\ is correlated with metal ion affinity to intermediate ligands such as many biochemical functional groups with O donor atoms. Further, ordination of metals according to ion characteristics, e.g., \log K-H\, facilitated prediction of paired metal interactions. Pairing metals with strong tendencies to complex with intermediate or soft ligands such as those with O or S donor atoms resulted in strong interactions.
RP Newman, MC (reprint author), SAVANNAH RIVER ECOL LAB,PO DRAWER E,AIKEN,SC 29802, USA.
NR 43
TC 54
Z9 57
U1 0
U2 10
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 MAR
PY 1996
VL 15
IS 3
BP 275
EP 281
DI 10.1897/1551-5028(1996)015<0275:PRTAIO>2.3.CO;2
PG 7
WC Environmental Sciences; Toxicology
SC Environmental Sciences & Ecology; Toxicology
GA TW732
UT WOS:A1996TW73200008
ER
PT J
AU Gibbs, MH
Wicker, LF
Stewart, AJ
AF Gibbs, MH
Wicker, LF
Stewart, AJ
TI A method for assessing sublethal effects of contaminants in soils to the
earthworm, Eisenia foetida
SO ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
LA English
DT Article
DE ecological risk assessment; Eisenia foetida; sublethal effects; soil
toxicity; earthworm
ID REPRODUCTION; GROWTH; POPULATION; ANDREI; TESTS
AB We developed and tested a procedure that allows quantification of the effects of soil contaminants on earthworm (Eisenia foetida) growth and reproduction. The procedure monitors isolated pairs of earthworms and generates a higher ratio of data per organism than other commonly used procedures. It also incorporates an accurate technique for measuring adult growth, has high sensitivity compared to the Organization for Economic Cooperation and Development (OECD) 14-d acute toxicity test, and is cost effective. We applied the method to a variety of soil-testing problems. A food-and-substrate trial using artificial soil demonstrated the sensitivity of the method and the need for food supplementation to stimulate earthworm reproduction. Application of the procedure to assess efficacy of a soil bioremediation technology revealed the advantage of measuring both growth and reproduction and highlighted the usefulness of a single integrated measure of these two responses. The method also was used as a fast-screening analysis for field soils in a large-scale ecological risk assessment. Finally, a reference toxicant, used in dilution series, demonstrated that responses of E. foetida using our method were similar to their responses in the OECD artificial-soil test method. The results of this study indicate that this procedure can be used both for regulatory and compliance needs within the framework of ecological risk assessment.
C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831.
UNIV TENNESSEE,CTR ENVIRONM BIOTECHNOL,KNOXVILLE,TN 37932.
OI stewart, arthur/0000-0003-1968-5997
NR 29
TC 36
Z9 40
U1 1
U2 19
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 MAR
PY 1996
VL 15
IS 3
BP 360
EP 368
DI 10.1897/1551-5028(1996)015<0360:AMFASE>2.3.CO;2
PG 9
WC Environmental Sciences; Toxicology
SC Environmental Sciences & Ecology; Toxicology
GA TW732
UT WOS:A1996TW73200021
ER
PT J
AU Perry, KE
McKelvie, J
AF Perry, KE
McKelvie, J
TI Measurement of energy release rates for delaminations in composite
materials
SO EXPERIMENTAL MECHANICS
LA English
DT Article
DE composite materials; fracture mechanics; interferometry; moire
interferometry; test procedures
ID PHASE; INTERFEROMETRY; ALGORITHM
AB Conventional measurements of energy release rates, G(I) and G(II), for delaminations in composite materials, generally utilize loads, crack lengths and simple standard specimen geometries. In this work, a more widely applicable measurement method, using phase shifting moire and the J integral, is presented. The experimental technique described requires only fringe-pattern information and the elastic constants for the measurements - thus it can be used when the standard methods are inapplicable. Using conventional double-cantilever beam and end-notched flexure specimens, the energy release rate has been measured simultaneously by the moire method and the standard methods, with good agreement found between the two, This development will for the first time permit the experimental validation of new finite-element routines as they are developed.
C1 UNIV STRATHCLYDE, DEPT MECH ENGN, DIV MECH MAT, GLASGOW G1 1XJ, LANARK, SCOTLAND.
RP Perry, KE (reprint author), IDAHO NATL ENGN LAB, FRACTURE BEHAVIOR GRP, POB 1625, IDAHO FALLS, ID 83415 USA.
NR 18
TC 7
Z9 7
U1 0
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0014-4851
J9 EXP MECH
JI Exp. Mech.
PD MAR
PY 1996
VL 36
IS 1
BP 55
EP 63
DI 10.1007/BF02328698
PG 9
WC Materials Science, Multidisciplinary; Mechanics; Materials Science,
Characterization & Testing
SC Materials Science; Mechanics
GA UH488
UT WOS:A1996UH48800008
ER
PT J
AU Galbreath, K
Zygarlicke, C
Casuccio, G
Moore, T
Gottlieb, P
AgronOlshina, N
Huffman, G
Shah, A
Yang, N
Vleeskens, J
Hamburg, G
AF Galbreath, K
Zygarlicke, C
Casuccio, G
Moore, T
Gottlieb, P
AgronOlshina, N
Huffman, G
Shah, A
Yang, N
Vleeskens, J
Hamburg, G
TI Collaborative study of quantitative coal mineral analysis using
computer-controlled scanning electron microscopy
SO FUEL
LA English
DT Article
DE coal mineralogy; scanning electron microscopy; interlaboratory testing
AB Six laboratories collaborated in an international study of the computer-controlled scanning electron microscopy (CCSEM) method of quantitative coal mineral analysis, A total of five analyses were performed by most of the laboratories on three bituminous coal samples: Pittsburgh No. 8, Illinois No. 6 and Prince. Repeatability relative standard deviation (RSD(r)) was <20% for the four minerals analysed: calcite, kaolinite, pyrite and quartz. Reproducibility relative standard deviations (RSD(R)) ranged from 21 to 83%. Reproducibility of the kaolinite results was the poorest, with an average RSD(R) of 60%, and pyrite was the best, with an average RSD(R) of 22%. The reproducibility of calcite and quartz analysis results was similar, with an average RSD(R) of 38 and 36% respectively. Although pyrite content was determined the most precisely, normative mineral calculations indicate that the results are overbalanced. Improvement in the interlaboratory agreement of CCSEM results will require the development of a standardized calibration procedure.
C1 RJ LEE GRP,MONROEVILLE,PA 15146.
CSIRO,DIV MINERAL & PROC ENGN,CLAYTON,VIC 3168,AUSTRALIA.
UNIV KENTUCKY,LEXINGTON,KY 40506.
SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94500.
NETHERLANDS ENERGY RES FDN,1755 G PETTEN,NETHERLANDS.
RP Galbreath, K (reprint author), UNIV N DAKOTA,ENERGY & ENVIRONM RES CTR,GRAND FORKS,ND 58202, USA.
NR 22
TC 32
Z9 32
U1 1
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 MAR
PY 1996
VL 75
IS 4
BP 424
EP 430
DI 10.1016/0016-2361(95)00277-4
PG 7
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB368
UT WOS:A1996UB36800004
ER
PT J
AU Afifi, AI
Chornet, E
Thring, RW
Overend, RP
AF Afifi, AI
Chornet, E
Thring, RW
Overend, RP
TI The aryl ether bond reactions with H-donor solvents: Guaiacol and
tetralin in the presence of catalysts
SO FUEL
LA English
DT Article
DE aryl ether bond; H-donor solvents; catalysts
ID CARBON-OXYGEN BOND; HYDROGENOLYSIS; HYDROCRACKING; CLEAVAGE
AB The effect of homogenous catalysis, Fe and Ru, on the conversion of guaiacol in tetralin to catechol and phenol has been investigated as a model for the behaviour of the aryl-oxy linkage that is found in wood, peat and younger coals. In the absence of catalyst and at low ratios of guaiacol to tetralin, the primary product is catechol. Kinetic analysis has confirmed that the rate constant for this primary and rate determining step is given by an Arrhenius pre-exponential factor of 10(13.8) s(-1) With an activation energy of 215 kJ mol(-1). The activation energy found is in good agreement with those of other investigators and lies between the values proposed for homolytic fission (>240 kJ mol(-1)) and for a concerted or pericyclic reaction (188 kJ mol(-1)). In the presence of catalysts the rate is not changed; however, the yield of a secondary product phenol is increased with both Fe and Ru. Separate experiments confirmed that the selectivity of catechol to phenol conversion was markedly increased in the presence of these catalysts. There is strong evidence for the formation of catecholato-iron complexes and this suggests that in pyrolysis and liquefaction of biomass and young coals there may well be a role for homogeneous catalysts in directing the product slate towards useful intermediate chemicals such as phenols.
C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401.
UNIV SHERBROOKE,DEPT GENIE CHIM,SHERBROOKE,PQ J1K 2R1,CANADA.
OI Overend, Ralph/0000-0002-5442-0890
NR 14
TC 17
Z9 17
U1 1
U2 15
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 MAR
PY 1996
VL 75
IS 4
BP 509
EP 516
DI 10.1016/0016-2361(95)00199-9
PG 8
WC Energy & Fuels; Engineering, Chemical
SC Energy & Fuels; Engineering
GA UB368
UT WOS:A1996UB36800015
ER
PT J
AU Travlos, GS
Mahler, J
Ragan, HA
Chou, BJ
Bucher, JR
AF Travlos, GS
Mahler, J
Ragan, HA
Chou, BJ
Bucher, JR
TI Thirteen-week inhalation toxicity of 2- and 4-chloronitrobenzene in
F344/N rats and B6C3F1 mice
SO FUNDAMENTAL AND APPLIED TOXICOLOGY
LA English
DT Article
ID ZERO DOSE CONTROL; VIRAL-INFECTIONS; TUMOR PREVALENCE; BODY-WEIGHT;
CARCINOGENICITY; SURVIVAL
AB Toxicity studies were performed by exposing F344/N rats and B6C3F1 mice to 2- and 4-chloronitrobenzene (CNB) by whole-body inhalation 6 hr/day, 5 days/week, for 13 weeks. Animals were evaluated for clinical chemistry (rats), hematology (rats), histopathology, and body/organ weights. Exposure concentrations were 0, 1.1, 2.3, 4.5, 9, and 18 ppm for 2-CNB and 0, 1.5, 3, 6, 12, and 24 ppm for 4-CNB. All rats in the 2-CNB study survived until the end of the study. Two male mice in the 18-ppm group in the 2-CNB study, however, died during Week 12; no deaths attributable to 4-CNB exposure occurred in rats or mice. In both studies, the mean body weight gains of exposed animals were similar to those of the respective controls. In rats, inhalation exposure to 2- or 4-CNB resulted in methemoglobinemia leading to a regenerative anemia and a variety of tissue changes secondary to the oxidative erythrocyte injury. In the 2-CNB study, methemoglobinemia resulted in a normocytic, normochromic, responsive anemia, whereas with 4-CNB, the methemoglobinemia was more severe and resulted in a macrocytic, hyperchromic, responsive anemia. Alterations of erythrocyte morphology were observed in both studies; changes included Heinz bodies, poikilocytes, and polychromasia. In rats, both isomers caused increases in serum activities of alanine aminotransferase and sorbitol dehydrogenase and increased bile acid concentrations. Microscopic liver changes included hemosiderin deposition in Kupffer cells (rats and mice exposed to 4-CNB), hepatocytomegaly (mice), and cytoplasmic basophilia (rats). Hepatocellular necrosis and chronic inflammation observed in mice were rather specific to the 2-CNB isomer, as only slight evidence of focal necrosis in the liver was observed in mice exposed to 4-CNB. Splenic lesions included hemosiderin accumulation, capsular fibrosis, and increased hematopoietic cell proliferation. Increased bone marrow hemosiderin and hematopoietic cell proliferation and kidney tubule hemosiderin deposition were also observed. Other findings, attributed to chemical exposure but not to the hematotoxicity, were described. Lesions included hyaline droplet nephropathy and degeneration of the testis in male rats exposed to 4-CNB, inflammation of the harderian gland in rats exposed to 4-CNB, hyperplasia of the nasal cavity epithelium in rats exposed to 2-CNB, and hyperplasia of the forestomach epithelium in mice exposed to 4-CNB; these lesions have not been described previously in studies with these chemicals. Based on the exposure concentrations evaluated, A no-observed-adverse-effect level (NOAEL) for histopathological injury in mice was 4.5 ppm for 2-chloronitrobenzene and 6 ppm for 4-chloronitrobenzene; a NOAEL was not determined for rats. (C) 1996 Society of Toxicology
C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA.
RP Travlos, GS (reprint author), NIEHS, POB 12233, RES TRIANGLE PK, NC 27709 USA.
NR 46
TC 27
Z9 39
U1 1
U2 7
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 0272-0590
J9 FUND APPL TOXICOL
JI Fundam. Appl. Toxicol.
PD MAR
PY 1996
VL 30
IS 1
BP 75
EP 92
DI 10.1006/faat.1996.0045
PG 18
WC Toxicology
SC Toxicology
GA TY224
UT WOS:A1996TY22400009
PM 8812232
ER
PT J
AU Hooper, EB
Hammer, JH
Barnes, CW
Fernandez, JC
Wysocki, FJ
AF Hooper, EB
Hammer, JH
Barnes, CW
Fernandez, JC
Wysocki, FJ
TI A re-examination of spheromak experiments and opportunities
SO FUSION TECHNOLOGY
LA English
DT Article
DE spheromak; energy confinement sealing; proposed experimental tests
ID MESH FLUX CONSERVERS; ENERGY CONFINEMENT; MAGNETIC-FIELD; CTX SPHEROMAK;
DECAYING SPHEROMAK; RELAXATION; PLASMA; FLUCTUATIONS; SUSTAINMENT;
TURBULENCE
AB The results of spheromak experiments are re-examined in light of the hypothesis that the core energy confinement is considerably better than the global confinement and that it extrapolates favorably with magnetic Reynolds number S. The data in decaying spheromaks are found to be consistent with the hypothesis and with magnetic fluctuations scaling as S--1/2 and determining the electron thermal conductivity. No conclusion is drawn from the data for sustained spheromaks, indicating the importance of a new experiment to determine core energy confinement while helicity is injected. The characteristics of such an experiment are discussed, including the importance of using modern vacuum and wall-conditioning techniques and of minimizing magnetic field errors.
C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
RP Hooper, EB (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,LIVERMORE,CA 94551, USA.
RI Fernandez, Juan/H-3268-2011
OI Fernandez, Juan/0000-0002-1438-1815
NR 44
TC 24
Z9 24
U1 2
U2 4
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 MAR
PY 1996
VL 29
IS 2
BP 191
EP 205
PG 15
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA TY435
UT WOS:A1996TY43500002
ER
PT J
AU Fowler, TK
AF Fowler, TK
TI Theoretical aspects of energy confinement in spheromaks
SO FUSION TECHNOLOGY
LA English
DT Article
DE spheromak; magnetic turbulence; energy confinement
ID TURBULENCE; PLASMAS
AB Despite the poor global energy confinement observed in spheromak experiments to dare, the long-term prospects may be favorable as spheromaks are scaled to larger size and higher temperatures. The present performance is traced to excessive magnetic energy loss at the edge compared to tokamaks and hear transport due to magnetic fluctuations, both of which should scale away as the temperature increases.
RP Fowler, TK (reprint author), LAWRENCE LIVERMORE NATL LAB,POB 808,L-640,LIVERMORE,CA 94550, USA.
NR 12
TC 20
Z9 20
U1 0
U2 1
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 MAR
PY 1996
VL 29
IS 2
BP 206
EP 209
PG 4
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA TY435
UT WOS:A1996TY43500003
ER
PT J
AU Peng, YKM
Goldston, RJ
Colchin, RJ
Hooper, EB
Kaye, SM
Ono, M
Siemon, RE
Stambaugh, R
Wootton, AJ
AF Peng, YKM
Goldston, RJ
Colchin, RJ
Hooper, EB
Kaye, SM
Ono, M
Siemon, RE
Stambaugh, R
Wootton, AJ
TI Summary of workshop on establishing the physics basis needed to access
the potential of compact toroidal reactors, Oak Ridge, Tennessee, July
19-22, 1994
SO FUSION TECHNOLOGY
LA English
DT Editorial Material
C1 PRINCETON UNIV,PLASMA PHYS LAB,PRINCETON,NJ 08544.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
GEN ATOM CO,FUS GRP,SAN DIEGO,CA 92186.
UNIV TEXAS,AUSTIN,TX 78712.
RP Peng, YKM (reprint author), OAK RIDGE NATL LAB,POB 2009,OAK RIDGE,TN 37831, USA.
NR 0
TC 4
Z9 4
U1 0
U2 0
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525
SN 0748-1896
J9 FUSION TECHNOL
JI Fusion Technol.
PD MAR
PY 1996
VL 29
IS 2
BP 210
EP 215
PG 6
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA TY435
UT WOS:A1996TY43500004
ER
PT J
AU Yamanishi, T
Enoeda, M
Okuno, K
Sherman, RH
AF Yamanishi, T
Enoeda, M
Okuno, K
Sherman, RH
TI A control method for the cryogenic distillation column with a feedback
stream
SO FUSION TECHNOLOGY
LA English
DT Article
DE cryogenic distillation; control; hydrogen isotopes
ID SYSTEM
AB A control method was proposed for the cryogenic distillation column with a feedback stream. The top and bottom flow rates of the column are adjusted for the variation of external feed composition to control product purity. The flow rate of the side stream and the power of the reboiler heater are promptly and linearly changed with the corresponding variation of external feed flow rate. Ordinary columns with no feedback stream are first-order lag systems for the case where the top flow rate is chosen as a manipulated variable. On the other hand, the column with a feedback stream is a second-order lag system even in this case. The parameter-setting method of the proportional-integral (PI) controller was proposed to predict the unstable region in the control of the column. The method can also be applied to the case where the measurement of the controlled variable is accompanied by a long time lag. However, the longer time lag requires a larger integral time, and the larger integral time brings a larger overshoot and slower damping for the controlled variable. For this case, the promptness of the control can be improved by introducing the PI derivative controller.
C1 LOS ALAMOS NATL LAB,TRITIUM SYST TEST ASSEMBLY,LOS ALAMOS,NM 87545.
RP Yamanishi, T (reprint author), JAPAN ATOM ENERGY RES INST,TRITIUM ENGN LAB,TOKAI,IBARAKI 31911,JAPAN.
NR 19
TC 1
Z9 1
U1 0
U2 0
PU AMER NUCLEAR SOCIETY
PI LA GRANGE PK
PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60525
SN 0748-1896
J9 FUSION TECHNOL
JI Fusion Technol.
PD MAR
PY 1996
VL 29
IS 2
BP 232
EP 243
PG 12
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA TY435
UT WOS:A1996TY43500006
ER
PT J
AU Juliano, DR
Ruzic, DN
Hill, D
Werley, KA
AF Juliano, DR
Ruzic, DN
Hill, D
Werley, KA
TI Sensitivity of neutral throughput to geometry and plasma position in the
Tokamak Physics Experiment divertor region
SO FUSION TECHNOLOGY
LA English
DT Article
DE fusion; divertor; TPX
AB Sufficient neutral atom and molecular throughput is essential for the steady-state operation of the proposed Tokamak Physics Experiment tokamak. To predict the throughput, the B2 edge-plasma fluid code and the DEGAS Monte Carlo neutral transport code were coupled globally. For the day 1 low-power (17.5-MW) operation condition, the recycling coefficient for both codes matched at 0.985, implying that for every 1000 ions striking the divertor plate, 15 are ultimately removed down the pump duct. The neutral molecular density was 2.52 +/- 0.15 x 10(19)/m(3), giving a throughput of 92.6 +/- 5.6 Torr . l/s. Varying the scrape-off length for the plasma extending into the gap between the baffle and the plate from 0 to 2 cm decreased the throughput by a factor of >2. Moving the strike point away from the gap at first increases the throughput by lessening the pumping efficiency of the plasma in the gap. As the plasma is moved even farther away, the throughput drops due to a lack of source term for neutrals entering the pumped region. Illustrating the importance of moving the source term, moving the strike point away from the gap but retaining the original plasma in the gap lowers the throughput by a factor of 10. Altering the curvature of the baffle has little effect on the neutral solution.
C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
RP Juliano, DR (reprint author), UNIV ILLINOIS,103 S GOODWIN AVE,URBANA,IL 61801, USA.
NR 7
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 0748-1896
J9 FUSION TECHNOL
JI Fusion Technol.
PD MAR
PY 1996
VL 29
IS 2
BP 269
EP 276
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA TY435
UT WOS:A1996TY43500009
ER
PT J
AU Ho, SK
Perkins, LJ
AF Ho, SK
Perkins, LJ
TI Incorporating safety and environmental aspects in fusion reactor systems
studies - The prerequisites, impacts, and applications
SO FUSION TECHNOLOGY
LA English
DT Article
DE systems studies; safety and environment; reactor design
ID METHODOLOGY
AB A first-of-its-kind comprehensive overview of schematic procedures for incorporating safety and environmental (S&E) aspects in fusion reactor systems studies is presented. The potential future application of this methodology will provide a tool to enhance the emphasis on S&E interactively in the early phase of reactor design studies. This is illustrated by some representative couplings between reactor design parameters and S&E characteristics.
C1 UNIV CALIF BERKELEY,DEPT NUCL ENGN,BERKELEY,CA 94720.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
NR 18
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 0748-1896
J9 FUSION TECHNOL
JI Fusion Technol.
PD MAR
PY 1996
VL 29
IS 2
BP 294
EP 301
PG 8
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA TY435
UT WOS:A1996TY43500011
ER
PT J
AU Li, QY
Lennon, GG
Brook, JD
AF Li, QY
Lennon, GG
Brook, JD
TI The identification of exons from the MED/PSACH region of human
chromosome 19
SO GENOMICS
LA English
DT Article
ID MULTIPLE EPIPHYSEAL DYSPLASIA; FAIRBANK TYPE; GENE; DNA;
PSEUDOACHONDROPLASIA; CANDIDATE; CARTILAGE; CELLS; CDNAS
AB We have used exon amplification to identify putative transcribed sequences from an 823-kb contig consisting of 28 cosmids that form a minimum tiling path from the interval 19p12-p13.1. This region contains the genes responsible for multiple epiphyseal dysplasia (MED) and pseudoachondroplasia (PSACH). We have trapped 66 exons (an average of 2.4 exons per cosmid) from pools of 2 or 3 cosmids, The majority of exons (51.5%) show only weak similarity or no similarity (36.3%) to sequences in current databases, Six of 8 exons examined from these groups, however, show cross-species sequence conservation, indicating that many of them probably represent authentic exons. Eight exons show identity or significant similarity to ESTs or known genes, including the human TNF receptor 3'-flanking region gene, human epoxide hydrolase (EPHX), human growth/differentiation factor (GOF-1), human myocyte-specific enhancer factor 2, the rat neurocan gene, and the human cartilage oligomeric matrix protein gene (COMP), Mutations in this latter gene have recently been shown to be responsible for MED and PSACH. (C) 1996 Academic Press, Inc.
C1 UNIV NOTTINGHAM HOSP,QUEENS MED CTR,DEPT GENET,NOTTINGHAM NG7 2UH,ENGLAND.
CITY HOSP NOTTINGHAM,CTR MED GENET,NOTTINGHAM NG5 1PB,ENGLAND.
LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,LIVERMORE,CA 94551.
OI Brook, John David/0000-0002-5946-6740
NR 32
TC 7
Z9 7
U1 0
U2 0
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 0888-7543
J9 GENOMICS
JI Genomics
PD MAR 1
PY 1996
VL 32
IS 2
BP 218
EP 224
DI 10.1006/geno.1996.0108
PG 7
WC Biotechnology & Applied Microbiology; Genetics & Heredity
SC Biotechnology & Applied Microbiology; Genetics & Heredity
GA TZ197
UT WOS:A1996TZ19700006
PM 8833148
ER
PT J
AU Kim, Y
Cygan, RT
Kirkpatrick, RJ
AF Kim, Y
Cygan, RT
Kirkpatrick, RJ
TI Cs-133 NMR and XPS investigation of cesium adsorbed on clay minerals and
related phases
SO GEOCHIMICA ET COSMOCHIMICA ACTA
LA English
DT Article
ID SOLID-STATE NMR; NUCLEAR-MAGNETIC-RESONANCE; SURFACE-CHARGE;
WATER-MOLECULES; CATIONS; MULTINUCLEAR; KAOLINITE; SMECTITES; DYNAMICS;
SORPTION
AB Cs-133 MAS NMR and Cs XPS were used to study the adsorption of Cs on kaolinite, montmorillonite, corundum, and gibbsite from 0.1 N and 0.01 N CsCl solutions. XPS spectra for all samples except gibbsite contain strong signals associated with Cs 3d(3/2) and 3d(5/2) photopeaks. This result indicates that minerals without exchangeable cation sites have a tendency to sorb Cs on surfaces and along grain boundaries, although less than 1 mol% Cs is observed on these surfaces. Multiple surface or interlayer sites for Cs cannot be resolved from the individual Cs XPS peaks. The Cs-133 NMR data, combined with TEM/XRD data for kaolinite show the following: (1) For montmorillonite, most of the Cs is adsorbed in the interlayers and at room humidity is motionally averaged among two or more sites at room temperature. (2) The spectra for kaolinite are similar to those of montmorillonite, and the tightly bonded Cs in our sample appears to be in expandable interlayers which exist as mixed layers with kaolinite and not as discrete smectite. (3) The Ca environments in both montmorillonite and kaolinite are sensitive to humidity. (4) For kaolinite the Cs-133 chemical shift changes at low temperature and 100% humidity, indicating that the interlayer charge of its expandable layers is very small. (5) No Cs-133 NMR Signal could be detected for gibbsite or corundum. Cs-133 NMR may be a useful probe of the presence and characteristics of expandable layers in kaolinite.
C1 SANDIA NATL LABS,DEPT GEOCHEM,ALBUQUERQUE,NM 87185.
RP Kim, Y (reprint author), UNIV ILLINOIS,DEPT GEOL,URBANA,IL 61801, USA.
NR 61
TC 80
Z9 80
U1 4
U2 28
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0016-7037
J9 GEOCHIM COSMOCHIM AC
JI Geochim. Cosmochim. Acta
PD MAR
PY 1996
VL 60
IS 6
BP 1041
EP 1052
DI 10.1016/0016-7037(95)00452-1
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA UA259
UT WOS:A1996UA25900010
ER
PT J
AU Finney, SC
Grubb, BJ
Hatcher, RD
AF Finney, SC
Grubb, BJ
Hatcher, RD
TI Graphic correlation of Middle Ordovician graptolite shale, southern
Appalachians: An approach for examining the subsidence and migration of
a Taconic foreland basin
SO GEOLOGICAL SOCIETY OF AMERICA BULLETIN
LA English
DT Article
ID ACCUMULATION RATES; TECTONIC EVOLUTION; ATHENS SHALE; SEDIMENTATION;
STRATIGRAPHY; SEQUENCES; CARBONATE; SECTIONS; ALABAMA; OROGENY
AB Graptolite-rich shale in the Valley and Ridge province of Alabama, Georgia, Tennessee, and Virginia records subsidence and migration of the Sevier foreland basin, which formed in response to are-continent collision during the Middle Ordovician Blountian phase of the Taconic orogeny. Rapid, tectonically induced subsidence of what had been a shallow carbonate platform led to pelagic deposition of graptolite shale in a deep basinal setting. The contact of the shale with the underlying carbonate rocks is a distinct record of initiation of subsidence.
Graptolites were collected extensively and systematically from the shale at 50 localities in the southern Appalachians. Correlation with zonal biostratigraphy demonstrated that the shale sequence is diachronous. In localities to the southeast, in Alabama and Georgia, it correlates with the Didymograptus murchisoni Zone. To the northwest, across strike in Alabama, Tennessee, and Virginia, the shale becomes progressively younger and correlates sequentially with the Glyptograptus teretiusculus, Nemagraptus gracilis, and Climacograptus bicornis Zones. This diachronism records the northwestward, cratonward migration of the foreland basin, which was driven by postcollisional plate convergence.
Biostratigraphic data from 22 localities were amenable to analysis by graphic correlation. At these localities, graptolites were collected from measured sections, and ranges of all species in the 22 sections were compiled into a CSRS (composite standard reference section) that correlates with the biostratigraphic interval from the G. teretiusculus Zone to the C. bicornis Zone. On the basis of the most reliable radiometric ages correlated into the graptolite zonation, the duration of the composite standard reference section is estimated to be 5 m.y. It is divisible into 89 CSUs (composite standard units), each with an approximate duration of 56 000 yr. Recorrelation of each of the 22 measured sections with the composite standard reference section allowed the stratigraphic base of the shale in each section be expressed in terms of composite standard units, and such correlations permitted the diachronism of the basal shale contact to be measured with much greater precision than with zonal biostratigraphy. In addition, age differences of the basal shale contact between sections can be expressed in terms of time.
With the temporal information provided by the composite standard reference section and original distances between sections determined from a palinspastic reconstruction, the rate of migration of the foreland basin as recorded in the diachronous basal shale contact was determined. Between sections in northeastern Tennessee and adjacent Virginia, calculated rates averaged 13 mm/yr and decreased northwestward from 40 to 9 mm/yr. This cratonward decrease in rate may represent deceleration as foreland basin migration, and the are-continent collision that drove it, slowed to a halt. The rate of 40 mm/yr may be considered as the maximum rate of plate convergence following are-continent collision. Precollisional plate convergence rates may have been significantly greater. The rate of 40 mm/yr is, however, well within the range of modern rates of plate convergence. In addition, the deceleration recorded in the Sevier foreland basin is similar to the deceleration of postcollisional plate convergence at the Timor Trough.
C1 RAYMOND M ALF MUSEUM,CLAREMONT,CA 91711.
UNIV TENNESSEE,DEPT GEOL SCI,KNOXVILLE,TN 37996.
OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831.
RP Finney, SC (reprint author), CALIF STATE UNIV LONG BEACH,DEPT GEOL SCI,LONG BEACH,CA 90840, USA.
NR 68
TC 26
Z9 27
U1 2
U2 5
PU GEOLOGICAL SOC AMERICA
PI BOULDER
PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301
SN 0016-7606
J9 GEOL SOC AM BULL
JI Geol. Soc. Am. Bull.
PD MAR
PY 1996
VL 108
IS 3
BP 355
EP 371
DI 10.1130/0016-7606(1996)108<0355:GCOMOG>2.3.CO;2
PG 17
WC Geosciences, Multidisciplinary
SC Geology
GA TY592
UT WOS:A1996TY59200007
ER
PT J
AU Doll, WE
Domoracki, WJ
Costain, JK
Coruh, C
Ludman, A
Hopeck, JT
AF Doll, WE
Domoracki, WJ
Costain, JK
Coruh, C
Ludman, A
Hopeck, JT
TI Seismic reflection evidence for the evolution of a transcurrent fault
system: The Norumbega fault zone, Maine
SO GEOLOGY
LA English
DT Article
ID STRIKE-SLIP-FAULT; CRUSTAL STRUCTURE; APPALACHIANS; MIGRATION; MOHO
AB A seismic reflection profile in east-central Maine reveals a steeply dipping fault zone that terminates in diffraction hyperbolae that are associated with an offset of the Moho. When combined with data from geologic mapping, the seismic data imply Mesozoic or post-Mesozoic dip-slip reactivation of the Norumbega fault zone, hitherto interpreted as a locus of mid- to late Paleozoic dextral offset. This finding highlights the value of seismic reflection data in determining the history of fault displacement and warns of the complexities that arise in attempts to seismically characterize faults in polygenic tectonic regimes.
C1 VIRGINIA POLYTECH INST & STATE UNIV,DEPT GEOL SCI,BLACKSBURG,VA 24061.
CUNY QUEENS COLL,DEPT GEOL,FLUSHING,NY 11367.
RP Doll, WE (reprint author), OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831, USA.
NR 26
TC 17
Z9 17
U1 0
U2 0
PU GEOLOGICAL SOC AMERICA
PI BOULDER
PA PO BOX 9140 3300 PENROSE PLACE, BOULDER, CO 80301
SN 0091-7613
J9 GEOLOGY
JI Geology
PD MAR
PY 1996
VL 24
IS 3
BP 251
EP 254
DI 10.1130/0091-7613(1996)024<0251:SREFTE>2.3.CO;2
PG 4
WC Geology
SC Geology
GA TY589
UT WOS:A1996TY58900015
ER
PT J
AU Steig, EJ
Polissar, PJ
Stuiver, M
Grootes, PM
Finkel, RC
AF Steig, EJ
Polissar, PJ
Stuiver, M
Grootes, PM
Finkel, RC
TI Large amplitude solar modulation cycles of Be-10 in Antarctica:
Implications for atmospheric mixing processes and interpretation of the
ice core record.
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID POLAR ICE; GLACIAL PERIOD; STRATOSPHERE
AB Be-10 concentrations in an ice core at Taylor Dome, Antarctica show greater variation over the last 75 years than similar Be-10 time-series from Greenland. Like the Greenland records, the new Antarctic data exhibit a strong periodicity which follows expected changes in the production rate of Be-10 over the 11-year solar cycle. Noting that the amplitude of production-rate variation is both latitude and altitude dependent, we estimate the relative contribution of Be-10 from different atmospheric reservoirs. The calculations yield a relatively small (< 35%) contribution from the low-to-mid latitude stratosphere, suggesting a weak coupling between Antarctic Be-10 and geomagnetic field intensity.
C1 UNIV WASHINGTON, QUATERNARY ISOTOPE LAB, DEPT GEOL SCI, SEATTLE, WA 98195 USA.
HAMPSHIRE COLL, SCH NAT SCI, AMHERST, MA 01002 USA.
LAWRENCE LIVERMORE NATL LAB, CTR ACCELERATOR MASS SPECTROMETRY, LIVERMORE, CA 94550 USA.
RI Grootes, Pieter/F-4952-2011; Polissar, Pratigya/L-8131-2013; Steig,
Eric/G-9088-2015
OI Steig, Eric/0000-0002-8191-5549
NR 40
TC 57
Z9 59
U1 1
U2 8
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD MAR 1
PY 1996
VL 23
IS 5
BP 523
EP 526
DI 10.1029/96GL00255
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA TZ786
UT WOS:A1996TZ78600028
ER
PT J
AU Taranenko, Y
RousselDupre, R
AF Taranenko, Y
RousselDupre, R
TI High altitude discharges and gamma-ray flashes: A manifestation of
runaway air breakdown
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID IONOSPHERE; THUNDERSTORM; FIELDS
AB gamma-ray flashes of atmospheric origin as well as blue jets and red sprites are naturally explained by high-altitude discharges produced by runaway air breakdown. We present the first detailed model of the development of upward propagating discharges and compute optical and gamma-ray emissions that are in excellent agree ment with observations. According to our theory, such discharges represent the first known manifestation of runaway air breakdown, a fundamental new process in plasma physics.
RP Taranenko, Y (reprint author), LOS ALAMOS NATL LAB,NIS-1,MS-D466,LOS ALAMOS,NM 87545, USA.
NR 26
TC 74
Z9 77
U1 0
U2 1
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD MAR 1
PY 1996
VL 23
IS 5
BP 571
EP 574
DI 10.1029/95GL03502
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA TZ786
UT WOS:A1996TZ78600040
ER
PT J
AU LaBrecque, DJ
Miletto, M
Daily, W
Ramirez, A
Owen, E
AF LaBrecque, DJ
Miletto, M
Daily, W
Ramirez, A
Owen, E
TI The effects of noise on Occam's inversion of resistivity tomography data
SO GEOPHYSICS
LA English
DT Article
ID SMOOTH; MODELS
AB An Occam's inversion algorithm for crosshole resistivity data that uses a finite-element method forward solution is discussed. For the inverse algorithm? the earth is discretized into a series of parameter blocks. each containing one or more elements, The Occam's inversion finds the smoothest 2-D model for which the Chi-squared statistic equals an a priori value.
Synthetic model data are used to show the effects of noise and noise estimates on the resulting 2-D resistivity images. Resolution of the images decreases with increasing noise. The reconstructions are underdetermined so that at low noise levels the images converge to an asymptotic image, not the true geoelectrical section,
If the estimated standard deviation is too low, the algorithm cannot achieve an adequate data fit, the resulting image becomes rough, and irregular artifacts start to appear. When the estimated standard deviation is larger than the correct value, the resolution decreases substantially (the image is too smooth), The same effects are demonstrated for field data from a site near Livermore, California, However, when the correct noise values are known, the Occam's results are independent of the discretization used.
A case history of monitoring at an enhanced oil recovery site is used to illustrate problems in comparing successive images over time from a site where the noise level changes. In this case, changes in image resolution can be misinterpreted as actual geoelectrical changes. One solution to this problem is to perform smoothest, but non-Occam's, inversion on later data sets using parameters found from the background data set.
C1 UNIV TURIN,DIPARTIMENTO SCI TERRA,I-10125 TURIN,ITALY.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
RP LaBrecque, DJ (reprint author), UNIV ARIZONA,DEPT GEOL & MINERAL,MINES BLDG,RM 229,TUCSON,AZ 85721, USA.
NR 17
TC 209
Z9 210
U1 1
U2 10
PU SOC EXPLORATION GEOPHYSICISTS
PI TULSA
PA 8801 S YALE ST, TULSA, OK 74137
SN 0016-8033
J9 GEOPHYSICS
JI Geophysics
PD MAR-APR
PY 1996
VL 61
IS 2
BP 538
EP 548
DI 10.1190/1.1443980
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA UA261
UT WOS:A1996UA26100021
ER
PT J
AU Malladi, R
Sethian, JA
AF Malladi, R
Sethian, JA
TI Image processing: Flows under min/max curvature and mean curvature
SO GRAPHICAL MODELS AND IMAGE PROCESSING
LA English
DT Article
ID EDGE-DETECTION; ALGORITHMS; DIFFUSION; CURVES; FRONTS
AB We present a class of PDE-based algorithms suitable for image denoising and enhancement. The techniques are applicable to both salt-and-pepper gray-scale noise and full-image continuous noise present in black and white images, gray-scale images, texture images, and color images. At the core, the techniques rely on two fundamental ideas. First, a level set formulation is used for evolving curves; use of this technique to flow isointensity contours under curvature is known to remove noise and enhance images. Second, the particular form of the curvature how is governed by a minimax switch which selects a range of denoising dependent on the size of switching window. Our approach has several virtues. First, it contains only one enhancement parameter, which in most cases is automatically chosen. Second, the scheme automatically stops smoothing at a point which depends on the switching window size; continued application of the scheme produces no further change. Third, the method is one of the fastest possible schemes based on a curvature-controlled approach. (C) 1996 Academic Press, Inc.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,BERKELEY,CA 94720.
RP Malladi, R (reprint author), UNIV CALIF BERKELEY,DEPT MATH,BERKELEY,CA 94720, USA.
NR 27
TC 85
Z9 96
U1 0
U2 11
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 1077-3169
J9 GRAPH MODEL IM PROC
JI Graph. Models Image Process.
PD MAR
PY 1996
VL 58
IS 2
BP 127
EP 141
DI 10.1006/gmip.1996.0011
PG 15
WC Computer Science, Software Engineering
SC Computer Science
GA UF097
UT WOS:A1996UF09700003
ER
PT J
AU Ballard, S
AF Ballard, S
TI The In Situ Permeable Flow Sensor: A ground-water flow velocity meter
SO GROUND WATER
LA English
DT Article
AB A new technology called the In Situ Permeable Flow Sensor has been developed at Sandia National Laboratories. These sensors use a thermal perturbation technique to directly measure the direction and magnitude of the full three-dimensional ground-water flow velocity vector in unconsolidated, saturated, porous media. The velocity measured is an average value characteristic of an approximately 1 cubic meter volume of the subsurface. The sensors are permanently buried in direct contact with the formation at the point where the velocity measurement is to be made. While this deployment strategy means that the approximately $2500 instruments are not recovered, borehole effects which can negatively influence the quality of the measurement are avoided. The sensors can be connected to a data acquisition system which can be monitored remotely, via modem and telephone connection, for extended periods of time. The technology is able to measure flow velocities in the range of 5 X 10(-6) to 1 X 10(-3) cm/s, depending on the thermal properties of the medium in which it is buried.
RP Ballard, S (reprint author), SANDIA NATL LABS,DEPT GEOPHYS,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 14
TC 37
Z9 37
U1 0
U2 12
PU GROUND WATER PUBLISHING CO
PI WESTERVILLE
PA 601 DEMPSEY RD, WESTERVILLE, OH 43081
SN 0017-467X
J9 GROUND WATER
JI Ground Water
PD MAR-APR
PY 1996
VL 34
IS 2
BP 231
EP 240
DI 10.1111/j.1745-6584.1996.tb01883.x
PG 10
WC Geosciences, Multidisciplinary; Water Resources
SC Geology; Water Resources
GA TY223
UT WOS:A1996TY22300006
ER
PT J
AU Huang, HS
Wu, JAM
Livengood, CD
AF Huang, HS
Wu, JAM
Livengood, CD
TI Development of dry control technology for emissions of mercury in flue
gas
SO HAZARDOUS WASTE & HAZARDOUS MATERIALS
LA English
DT Article; Proceedings Paper
CT 4th International Congress on Toxic Combustion By-Products
CY JUN 05-07, 1995
CL UNIV CALIF BERKELEY, BERKELEY, CA
HO UNIV CALIF BERKELEY
AB In flue gases from coal-combustion systems, mercury in either the elemental state or its chloride form (HgCl2) can be predominant among all the possible mercury species present; this predominance largely depends on the chlorine-to-mercury ratio in the coal feeds. Conventional flue-gas cleanup technologies are moderately effective in controlling HgCl2 but are very poor at controlling elemental mercury. Experiments were conducted on the removal of elemental mercury vapor by means of a number of different types of sorbents, using a fixed-bed adsorption system. Of the four commercial activated carbons evaluated, the sulfur-treated carbon sample gives the best removal performance, with good mercury-sorption capacities. Promising removal results also have been obtained with low-cost minerals after chemical treatments. These inorganic sorbents could potentially be developed into a cost-effective alternative to activated carbons for mercury removal.
RP Huang, HS (reprint author), ARGONNE NATL LAB,DIV ENERGY SYST,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 12
TC 21
Z9 22
U1 0
U2 4
PU MARY ANN LIEBERT INC PUBL
PI LARCHMONT
PA 2 MADISON AVENUE, LARCHMONT, NY 10538
SN 0882-5696
J9 HAZARD WASTE HAZARD
JI Hazard. Waste Hazard. Mater.
PD SPR
PY 1996
VL 13
IS 1
BP 107
EP 119
DI 10.1089/hwm.1996.13.107
PG 13
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA UM435
UT WOS:A1996UM43500011
ER
PT J
AU Filius, KD
Whitworth, CG
AF Filius, KD
Whitworth, CG
TI Emissions characterization and off-gas system development for processing
simulated mixed waste in a plasma centrifugal furnace
SO HAZARDOUS WASTE & HAZARDOUS MATERIALS
LA English
DT Article; Proceedings Paper
CT 4th International Congress on Toxic Combustion By-Products
CY JUN 05-07, 1995
CL UNIV CALIF BERKELEY, BERKELEY, CA
HO UNIV CALIF BERKELEY
AB Plasma are technology is a high temperature process that completely oxidizes organic waste fractions: inorganic hazardous and radionuculide waste fractions are oxidized and encapsulated in a highly durable slag. The robust nature of the technology lends itself to application of diverse mixed and hazardous wastestreams. Over 500 hours of testing have been completed at the Department of Energy's Western Environmental. Technology Office with a pilot-scale system. This testing was designed to demonstrate operability over a wide range of wastes and provide the data required to evaluate potential applications of the technology on both a technical and economic basis.
In addition to characterization of the off gas for typical combustion products, the fate of radionuculide surrogates and hazardous elements within the Plasma Are Centrifugal Treatment (PACT) system has been investigated extensively. Test results to date demonstrate that cerium, a plutonium surrogate, remains almost exclusively in the slag matrix. Hazardous elements such as chromium and lead volatilize to a greater extent and are captured by the off-gas system.
Preliminary design work is underway to develop a minimum emissions off-gas system for demonstration on a engineering-scale plasma unit. The proposed system will filter particulate matter from the hot gas stream and treat them in an electric ceramic oxidizer, which replaces the conventional afterburner, prior to quenching and acid gas removal. Potential future work would use a liquid monoethanolamine system and membrane filter to separate carbon dioxide and ni from the off-gas stream. The remainder of the gas stream: primarily oxygen, would be recycled back to the combustion chamber.
This paper will provide: 1) a summary of the design, development, and performance of the PACT off-gas system and 2) results of radionuculide surrogate and hazardous element portioning.
RP Filius, KD (reprint author), MSE TECHNOL APPLICAT INC,DOE WESTERN ENVIRONM TECHNOL OFF,POB 4078,BUTTE,MT 59702, USA.
NR 5
TC 3
Z9 3
U1 1
U2 2
PU MARY ANN LIEBERT INC PUBL
PI LARCHMONT
PA 2 MADISON AVENUE, LARCHMONT, NY 10538
SN 0882-5696
J9 HAZARD WASTE HAZARD
JI Hazard. Waste Hazard. Mater.
PD SPR
PY 1996
VL 13
IS 1
BP 143
EP 152
DI 10.1089/hwm.1996.13.143
PG 10
WC Engineering, Environmental; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA UM435
UT WOS:A1996UM43500014
ER
PT J
AU Likhtarev, IA
Kovgan, LN
Vavilov, SE
Gluvchinsky, RR
Perevoznikov, ON
Litvinets, LN
Anspaugh, LR
Kercher, JR
Bouville, A
AF Likhtarev, IA
Kovgan, LN
Vavilov, SE
Gluvchinsky, RR
Perevoznikov, ON
Litvinets, LN
Anspaugh, LR
Kercher, JR
Bouville, A
TI Internal exposure from the ingestion of foods contaminated by Cs-137
after the Chernobyl accident. Report 1. General model: Ingestion doses
and countermeasure effectiveness for the adults of Rovno Oblast of
Ukraine
SO HEALTH PHYSICS
LA English
DT Article
DE Cs-137; Chernobyl; accidents, reactor; dose assessment
ID RADIONUCLIDE INGESTION; CHAIN MODEL; PATHWAY
AB The Chernobyl accident, which occurred in April 1986, resulted in the atmospheric release of about 70-100 PBq of Cs-137. This paper examines the doses to the adult population of the northern part of Rovno Oblast, Ukraine, from ingestion of Cs-137, Fallout of Cs-137 in these regions was lower than in other regions of Ukraine, However, the transfer of Cs-137 from soil to milk in the region considered is high (up to 20 Bq L(-1) per kBq m(-2)) and results in the predominance of internal doses compared to those from external exposure, Numerous measurements of Cs-137 soil deposition, Cs-137 milk contamination, and Cs-137 body burden have been made in the area and form the basis of a general model of internal exposure from the ingestion of foods contaminated by Cs-137. This paper has two main purposes. The first is to develop the general phenomenological description of the process leading to internal exposure from the ingestion of Cs-137 contaminated foods in the situation where different countermeasures are realized, The second is to apply the model for the adult population of the northern part of the Rovno Oblast (first report) for the limited time period of up to six years after the accident, The doses actually received by the adults are estimated to be four to eight times smaller than the doses calculated for the situation without countermeasures.
C1 LAWRENCE LIVERMORE NATL LAB, DOSE RECONSTRUCT PROGRAM, LIVERMORE, CA 94550 USA.
NCI, BETHESDA, MD 20892 USA.
RP Likhtarev, IA (reprint author), UKRAINIAN ACAD TECHNOL SCI, RADIAT PROTECT INST, KIEV 252050, UKRAINE.
NR 36
TC 20
Z9 20
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD MAR
PY 1996
VL 70
IS 3
BP 297
EP 317
DI 10.1097/00004032-199603000-00001
PG 21
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 TW547
UT WOS:A1996TW54700002
PM 8609023
ER
PT J
AU Gilbert, ES
Fix, JJ
Baumgartner, WV
AF Gilbert, ES
Fix, JJ
Baumgartner, WV
TI An approach to evaluating bias and uncertainty in estimates of external
dose obtained from personal dosimeters
SO HEALTH PHYSICS
LA English
DT Article
DE dose, organ; dosimetry; nuclear workers; dosimetry, external
ID MEASUREMENT ERRORS; RADIATION; MORTALITY; EXPOSURE; WORKERS
AB This paper describes an approach to quantifying errors in recorded estimates of external radiation dose obtained from personal dosimeters and applies the approach to dose estimates of workers at the Hanford site. Because a major objective of this evaluation is to provide the information needed for adjusting epidemiologic dose-response analyses of worker data for errors in dose estimates, the paper addresses the extent that errors for different workers are correlated, focuses on recorded doses as estimates of organ doses, and gives consideration to both annual and cumulative doses. The evaluation emphasizes errors resulting from the fact that dosimeters are limited in their ability to respond accurately to all radiation energies to which workers are exposed or to radiation coming from all directions. For each of several sources of error, systematic bias factors are estimated for two energy ranges (100-300 keV and 300-1,000 keV), two geometries (anterior-posterior and rotational), and four calendar year periods. These are then combined using information provided by health physicists on energies and geometries in Hanford exposure environments. Except for the period before 1958, deep dose, the objective of modern dosimetry systems, was found to be fairly accurately estimated. Lung dose was found to be overestimated by about 10%, and bone marrow dose was found to be overestimated by about 50%. However, many aspects of this evaluation relied heavily on subjective judgments, and, thus, these factors are subject to considerable uncertainty, Estimates of uncertainty in the bias factors and uncertainty reflecting random error are provided.
RP Gilbert, ES (reprint author), PACIFIC NW LAB, POB 999, RICHLAND, WA 99352 USA.
FU NIOSH CDC HHS [R01 OH03270]
NR 20
TC 22
Z9 22
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 MAR
PY 1996
VL 70
IS 3
BP 336
EP 345
DI 10.1097/00004032-199603000-00003
PG 10
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 TW547
UT WOS:A1996TW54700004
PM 8609025
ER
PT J
AU Vickers, LR
AF Vickers, LR
TI The gender-specific chest wall thickness prediction equations for
routine measurements of Pu-239 and Am-241 within the lungs using HPGE
detectors
SO HEALTH PHYSICS
LA English
DT Article
DE Pu-239; Am-241; lungs, human; contamination, internal
AB The current chest wall thickness prediction equation is not applicable to use in routine lung counting measurements for detection of low energy photons (17-60 keV) within the lungs of male and female subjects. The current chest wall thickness prediction equation was derived for the NaI-CsI ''phoswich'' detection system, which is not the routine detection system in use; the subject position was supine, which is not the routine position; the equation did not account for the intercostal tissue thicknesses of muscle and adipose which significantly attenuate low energy photons (17-60 keV); it was derived from male subjects only and is used to predict the chest wall thickness of female subjects for whom it is not applicable. The current chest wall thickness prediction equation yields unacceptable percent errors in the HPGe detection efficiency calibration for Pu-239 and Am-241 (17- and 59.5-keV photons, respectively) relative to the gender-specific HPGe chest wall thickness prediction equations of this paper (+284% to -73% for Pu-239; +42% to -39% for Am-241). As a result, use of the current chest wall thickness prediction equation yields unacceptable percent errors (proportional in magnitude to the percent errors in the detection efficiency calibration) in the calculation of the minimum detectable activity (Bq) or in an initial assessment of a radioactive contamination exposure detected by a routine lung count measurement.
RP Vickers, LR (reprint author), US DOE, PANTEX PLANT, POB 30020, AMARILLO, TX 79177 USA.
NR 17
TC 14
Z9 14
U1 0
U2 1
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD MAR
PY 1996
VL 70
IS 3
BP 346
EP 357
DI 10.1097/00004032-199603000-00004
PG 12
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 TW547
UT WOS:A1996TW54700005
PM 8609026
ER
PT J
AU Strom, DJ
AF Strom, DJ
TI Ten principles and ten commandments of radiation protection
SO HEALTH PHYSICS
LA English
DT Article
DE radiation protection; as low as reasonably achievable (ALARA);
education; Health Physics Society
AB For decades, the phrase ''time, distance, and shielding'' has been presented as summarizing the ''basics'' of radiation protection. Indeed, for protection from external radiation sources, these three principles are probably the most important ones on which a worker can make decisions and take actions. However, these principles do not address protection against intakes of radioactive materials or ''ontakes'' (skin contamination), other risk-limiting measures, or other important protective measures taken by governments, public health agencies, regulators, and institutional programs (measures such as performance standards, health education, facility engineering requirements, and administrative procedures). I have identified ten principles and ten accompanying commandments of radiation protection: time, distance, dispersal, source reduction, source barrier, personal barrier, decorporation, effect mitigation, optimal technology, and limitation of other exposures. Corresponding non-technical forms of the commandments are hurry (but don't be hasty); stay away from it; disperse it and dilute it; use as little as possible; keep it in; keep it out; get it out or off of you (after intake or skin contamination); limit the damage; choose the best technology (perhaps a non-radiation technology); and don't compound risks (don't smoke). Technical versions of the commandments are also provided using the verbs ''optimize,'' ''maximize,'' or ''minimize.'' Not all commandments can be applied at the same time, and application may be different for workers and members of the public. Advantages, disadvantages, and implementation of these principles and commandments are discussed, and numerous examples provided. The application of the principles and commandments must be based on knowledge of the radiological conditions to be managed.
RP Strom, DJ (reprint author), PACIFIC NW LAB, HLTH PROTECT DEPT, POB 999, RICHLAND, WA 99352 USA.
NR 4
TC 6
Z9 6
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD MAR
PY 1996
VL 70
IS 3
BP 388
EP 393
DI 10.1097/00004032-199603000-00009
PG 6
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 TW547
UT WOS:A1996TW54700010
PM 8609031
ER
PT J
AU Eichorst, AJ
Clay, ME
AF Eichorst, AJ
Clay, ME
TI Assessment of personnel protective equipment use at two department of
energy facilities
SO HEALTH PHYSICS
LA English
DT Article
DE contamination; radiation protection; safety standards; operational
topics
AB Research facilities under the jurisdiction of the United States Department of Energy are required to formally report significant radioactive contamination incidents to the Department of Energy under Department of Energy Order 5000.3. Through the reporting process, the Department of Energy is given a detailed incident description through a notification report, periodically apprised of subsequent facility response through update reports, and informed of the corrective actions that the facility will implement to prevent incident recurrence through a final report. For tracking and trending purposes, the notification, update, and final reports are entered into the Department of Energy Occurrence Reporting and Processing System database, This paper details an analysis that was performed on the radioactive contamination incident reports that were entered into the Department of Energy Occurrence Reporting and Processing System database by two similar research facilities at Los Alamos National Laboratory. The analysis focused on personnel protective equipment requirements at the two facilities to determine whether personal skin and clothing contamination incidents could be better avoided.
RP Eichorst, AJ (reprint author), LOS ALAMOS NATL LAB, POB 1663, LOS ALAMOS, NM 87545 USA.
NR 2
TC 3
Z9 3
U1 0
U2 0
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0017-9078
EI 1538-5159
J9 HEALTH PHYS
JI Health Phys.
PD MAR
PY 1996
VL 70
IS 3
BP 402
EP 414
DI 10.1097/00004032-199603000-00011
PG 13
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 TW547
UT WOS:A1996TW54700013
PM 8609034
ER
PT J
AU Thomas, WA
AF Thomas, WA
TI Dismantling of VDRIF
SO HEALTH PHYSICS
LA English
DT Letter
RP Thomas, WA (reprint author), OAK RIDGE ASSOCIATED UNIV, OAK RIDGE, TN 37831 USA.
NR 7
TC 0
Z9 0
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 MAR
PY 1996
VL 70
IS 3
BP 430
EP 430
PG 1
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 TW547
UT WOS:A1996TW54700017
PM 8609038
ER
PT J
AU Rodriguez, JA
AF Rodriguez, JA
TI Electronic properties of bimetallic surfaces
SO HETEROGENEOUS CHEMISTRY REVIEWS
LA English
DT Review
ID CARBON-MONOXIDE CHEMISORPTION; ULTRATHIN METAL-FILMS; CO CHEMISORPTION;
CHEMICAL-PROPERTIES; THERMAL-DESORPTION; ACCEPTOR INTERACTIONS;
PALLADIUM FILMS; PD MONOLAYERS; NI FILMS; AU FILMS
AB The formation of a surface metal-metal bond can produce large perturbations in the electronic and chemical properties of a metal, In this review, we examine the electronic and chemical properties of bimetallic systems formed by vapor depositing metals from groups 10-12 of the periodic table onto single-crystal faces of transition or s,p metals, It is shown that the bonds in these systems are best described as 'metallic' with a small degree of 'ionic' character, In many cases, bimetallic bonding induces a redistribution of charge that affects the population of the d orbitals of the metals, producing binding-energy shifts in their core levels and valence d band, This may be viewed as a result of an optimization of the bonding capabilities of the metals, A very good correlation is found between the electronic perturbations in a bimetallic system and its cohesive energy, Bimetallic bonds that display a large stability usually involve a significant redistribution of charge around the metal centers, This redistribution of charge also affects the ability of the metals to adsorb CO, Some examples that illustrate this phenomenon are briefly discussed, For Pd and Pt atoms supported on surfaces of early-transition or s,p metals, there is a shift of electrons from the adatoms toward the metal-metal interface that weakens the strength of the Pd-CO and Pt-CO bonds, On the other hand, Cu atoms deposited on surfaces of late-transition metals exhibit a gain of d electrons that enhances the strength of the Cu-CO bond.
RP Rodriguez, JA (reprint author), BROOKHAVEN NATL LAB,DEPT CHEM,UPTON,NY 11973, USA.
NR 144
TC 20
Z9 20
U1 1
U2 15
PU JOHN WILEY & SONS LTD
PI W SUSSEX
PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD
SN 1068-6983
J9 HETEROGEN CHEM REV
JI Heterogeneous Chem. Rev.
PD MAR
PY 1996
VL 3
IS 1
BP 17
EP 32
DI 10.1002/(SICI)1234-985X(199603)3:1<17::AID-HCR52>3.0.CO;2-Z
PG 16
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UF416
UT WOS:A1996UF41600002
ER
PT J
AU Liebow, EB
AF Liebow, EB
TI At risk: Natural hazards, people's vulnerability, and disasters -
Blaikie,P, Cannon,T, Davis,I, Wisner,B
SO HUMAN ECOLOGY
LA English
DT Book Review
RP Liebow, EB (reprint author), BATTELLE SEATTLE RES CTR,SEATTLE,WA, USA.
NR 1
TC 0
Z9 0
U1 1
U2 5
PU PLENUM PUBL CORP
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013
SN 0300-7839
J9 HUM ECOL
JI Hum. Ecol.
PD MAR
PY 1996
VL 24
IS 1
BP 141
EP 145
PG 5
WC Anthropology; Environmental Studies; Sociology
SC Anthropology; Environmental Sciences & Ecology; Sociology
GA UB764
UT WOS:A1996UB76400008
ER
PT J
AU Kostrzewa, M
Grady, DL
Moyzis, RK
Floter, L
Muller, U
AF Kostrzewa, M
Grady, DL
Moyzis, RK
Floter, L
Muller, U
TI Integration of four genes, a pseudogene, thirty-one STSs, and a highly
polymorphic STRP into the 7-10 Mb YAC contig of 5q34-q35
SO HUMAN GENETICS
LA English
DT Article
ID MAP; CRANIOSYNOSTOSIS; CHROMOSOME-5; HOMEODOMAIN; LINKAGE; REGION
AB Thirty-one sequence tagged sites and a highly polymorphic short tandem repeat polymorphism have been isolated from 5q34-q35 and integrated into the yeast artificial chromosome (YAC) contig of 5q34-q35. In addition, four genes (MSX2, CSX, DRD1, and CL100) and a pseudogene (GLUT6) were localized on this map. The high density of new markers in the region allowed further refinement of the YAC contig of distal 5q. This is a prerequisite for the conversion of this YAC into a cosmid contig.
C1 UNIV GIESSEN,INST HUMAN GENET,D-35392 GIESSEN,GERMANY.
LOS ALAMOS NATL LAB,CTR HUMAN GENOME STUDIES,LOS ALAMOS,NM 87545.
NR 18
TC 8
Z9 8
U1 0
U2 0
PU SPRINGER VERLAG
PI NEW YORK
PA 175 FIFTH AVE, NEW YORK, NY 10010
SN 0340-6717
J9 HUM GENET
JI Hum. Genet.
PD MAR
PY 1996
VL 97
IS 3
BP 399
EP 403
DI 10.1007/BF02185781
PG 5
WC Genetics & Heredity
SC Genetics & Heredity
GA TW364
UT WOS:A1996TW36400032
PM 8786091
ER
PT J
AU Berry, MW
Hazen, BC
MacIntyre, RL
Flamm, RO
AF Berry, MW
Hazen, BC
MacIntyre, RL
Flamm, RO
TI Lucas: A system for modeling land-use change
SO IEEE COMPUTATIONAL SCIENCE & ENGINEERING
LA English
DT Article
C1 OAK RIDGE NATL LAB,DIV ENVIRONM SCI,OAK RIDGE,TN 37831.
RP Berry, MW (reprint author), UNIV TENNESSEE,DEPT COMP SCI,107 AYRES HALL,KNOXVILLE,TN 37996, USA.
OI Berry, Michael/0000-0002-9191-9148
NR 16
TC 41
Z9 43
U1 1
U2 5
PU IEEE COMPUTER SOC
PI LOS ALAMITOS
PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264
SN 1070-9924
J9 IEEE COMPUT SCI ENG
JI IEEE Comput. Sci. Eng.
PD SPR
PY 1996
VL 3
IS 1
BP 24
EP 35
DI 10.1109/99.486758
PG 12
WC Computer Science, Theory & Methods; Engineering, Electrical &
Electronic; Mathematics, Applied
SC Computer Science; Engineering; Mathematics
GA UA403
UT WOS:A1996UA40300007
ER
PT J
AU Kuchta, DM
Schneider, RP
Choquette, KD
Kilcoyne, S
AF Kuchta, DM
Schneider, RP
Choquette, KD
Kilcoyne, S
TI Large- and small-signal modulation properties of RED (670 nm) VCSEL's
SO IEEE PHOTONICS TECHNOLOGY LETTERS
LA English
DT Article
AB The large- and small-signal properties of red VCSEL's (670 nm) were measured. For the fundamental mode the small signal bandwidth is 2 GHz. Large-signal modulation up to 1.5 Gb/s is achievable with a prebias, The turn-on delay of unbiased devices is found to saturate due to heating from the average of the data signal.
C1 SANDIA NATL LABS,CPDS SEMICOND RES LAB,ALBUQUERQUE,NM 87185.
RP Kuchta, DM (reprint author), IBM CORP,THOMAS J WATSON RES CTR,POB 218,YORKTOWN HTS,NY 10598, USA.
NR 11
TC 5
Z9 5
U1 1
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394
SN 1041-1135
J9 IEEE PHOTONIC TECH L
JI IEEE Photonics Technol. Lett.
PD MAR
PY 1996
VL 8
IS 3
BP 307
EP 309
DI 10.1109/68.481099
PG 3
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA TY868
UT WOS:A1996TY86800001
ER
PT J
AU Goncher, G
Lu, B
Luo, WL
Cheng, J
Hersee, S
Sun, SZ
Schneider, RP
Zolper, JC
AF Goncher, G
Lu, B
Luo, WL
Cheng, J
Hersee, S
Sun, SZ
Schneider, RP
Zolper, JC
TI Cryogenic operation of AlGaAs-GaAs vertical-cavity surface-emitting
lasers at temperatures from 200 K to 6 K
SO IEEE PHOTONICS TECHNOLOGY LETTERS
LA English
DT Article
AB We demonstrate for the first time the CW performance of AlGaAs-GaAs vertical-cavity surface-emitting lasers (VCSEL's) at cryogenic temperatures from 6 K to 200 K, By detuning the cavity mode with respect to the gain peak so that optimum de lasing operation is achieved at similar to 100 K, we find that this optimum lasing performance can be maintained down to temperatures as low as 6 K. Across a broad range of temperatures from 200 K to 6 K, the minimum threshold current of a 16-mu m diameter VCSEL stayed below 4 mA, while its -3-dB modulation bandwidth increased by about 70% to 11 GHz at 6 K, and the external slope efficiency is greater than 70%.
C1 SDL INC,SAN JOSE,CA 95134.
UNIV NEW MEXICO,CTR HIGH TECHNOL MAT,ALBUQUERQUE,NM 87131.
SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
RP Goncher, G (reprint author), TEKTRONIX INC,POB 500,BEAVERTON,OR 97077, USA.
NR 13
TC 15
Z9 15
U1 0
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 MAR
PY 1996
VL 8
IS 3
BP 316
EP 318
DI 10.1109/68.481102
PG 3
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA TY868
UT WOS:A1996TY86800004
ER
PT J
AU Johnson, DF
Opie, DB
Schone, HE
Lanagan, MT
Stevens, JC
AF Johnson, DF
Opie, DB
Schone, HE
Lanagan, MT
Stevens, JC
TI High-temperature superconducting magnetic shields formed by deep drawing
SO IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
LA English
DT Article
ID BA-CU-O; CYLINDERS; SQUID; AG
AB A new method for the construction of high-temperature superconducting magnetic shielding structures has been demonstrated. With this process, a ceramic laminate of high-temperature superconducting powder and silver metal sheets is formed and then shaped into a cylindrical magnetic shield by deep drawing before being sintered, Two types of superconducting powders were used in this experiment, YBa2Cu3O7 and Bi1.8Pb0.4Sr2Ca2Cu3Ox, which exhibited shielding factors of 1100 and 330, respectively.
C1 PHYS SCI INC,ALEXANDRIA,VA 22314.
ANL,DIV ENERGY TECHNOL,ARGONNE,IL 60439.
RP Johnson, DF (reprint author), COLL WILLIAM & MARY,DEPT PHYS,WILLIAMSBURG,VA 23187, USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394
SN 1051-8223
J9 IEEE T APPL SUPERCON
JI IEEE Trans. Appl. Supercond.
PD MAR
PY 1996
VL 6
IS 1
BP 50
EP 54
DI 10.1109/77.488281
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA UJ419
UT WOS:A1996UJ41900010
ER
PT J
AU Rau, NS
Short, WD
AF Rau, NS
Short, WD
TI Opportunities for the integration of intermittent renewable resources
into networks using existing storage
SO IEEE TRANSACTIONS ON ENERGY CONVERSION
LA English
DT Article; Proceedings Paper
CT 1995 IEEE/PES Summer Meeting
CY JUL 23-25, 1995
CL PORTLAND, OR
SP IEEE, PES
AB The absorption of energy from intermittent resources (IR) into the existing storage in a system is described. A subsequent reshaping of this energy to sell it as firm energy is possible by exploiting the diversity in demands, generations. An algorithm to optimize the installations of IR to maximize firm sales is presented
RP Rau, NS (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA.
NR 4
TC 1
Z9 1
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394
SN 0885-8969
J9 IEEE T ENERGY CONVER
JI IEEE Trans. Energy Convers.
PD MAR
PY 1996
VL 11
IS 1
BP 181
EP 187
DI 10.1109/60.486594
PG 7
WC Energy & Fuels; Engineering, Electrical & Electronic
SC Energy & Fuels; Engineering
GA TX678
UT WOS:A1996TX67800026
ER
PT J
AU Tatchyn, R
AF Tatchyn, R
TI Planar permanent magnet multipoles for particle accelerator and storage
ring applications (vol 30, pg 5050, 1994)
SO IEEE TRANSACTIONS ON MAGNETICS
LA English
DT Correction, Addition
RP Tatchyn, R (reprint author), STANFORD LINEAR ACCELERATOR CTR,STANFORD SYNCHROTRON RADIAT LAB,STANFORD,CA 94309, USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2394
SN 0018-9464
J9 IEEE T MAGN
JI IEEE Trans. Magn.
PD MAR
PY 1996
VL 32
IS 2
BP 601
EP 601
PG 1
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA TY871
UT WOS:A1996TY87100045
ER
PT J
AU Plumer, ES
AF Plumer, ES
TI Optimal control of terminal processes using neural networks
SO IEEE TRANSACTIONS ON NEURAL NETWORKS
LA English
DT Article
AB Feedforward neural networks are capable of approximating continuous multivariate functions and, as such, can implement nonlinear state-feedback controllers. Training methods such as backpropagation-through-time (BPTT), however, do not deal with terminal control problems in which the specified cost function includes the elapsed trajectory-time. In this paper, an extension to BPTT is proposed which addresses this limitation, The controller design is reformulated as a constrained optimization problem defined over the entire field of extremals and in which the set of trajectory times is incorporated into the cost function. Necessary first-order stationary conditions are derived which correspond to standard BPTT with the addition of certain transversality conditions. The new gradient algorithm based on these conditions, called time-optimal backpropagation through time (TOBPTT), is tested on two benchmark minimum-time control problems.
RP Plumer, ES (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA.
NR 29
TC 21
Z9 24
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 1045-9227
J9 IEEE T NEURAL NETWOR
JI IEEE Trans. Neural Netw.
PD MAR
PY 1996
VL 7
IS 2
BP 408
EP 418
DI 10.1109/72.485676
PG 11
WC Computer Science, Artificial Intelligence; Computer Science, Hardware &
Architecture; Computer Science, Theory & Methods; Engineering,
Electrical & Electronic
SC Computer Science; Engineering
GA UB609
UT WOS:A1996UB60900015
PM 18255594
ER
PT J
AU Toemoe, S
Rao, NSV
Mann, RC
AF Toemoe, S
Rao, NSV
Mann, RC
TI Learning-based method to recognize and localize glassware using laser
range images
SO IMAGE AND VISION COMPUTING
LA English
DT Article
DE laser range images; glassware; neural networks; perceptrons; learning
AB A system that can be trained to recognize and localize glassware located on a workbench using laser range images is described. The training data consists of laser range images of objects of known classification. The image is preprocessed to isolate a box of pixels corresponding to the object, and then the box is given as an input to a neural network. The range readings from the laser range system deviate significantly from the actual distances to the glassware, and consequently a surface fit to the readings has very little resemblance to the actual glassware surface. Thus, the straightfoward method of fitting a surface to the images and matching it with the surface of known glassware is not feasible. A first version of the system has been developed based on a system of perceptrons, and the tests have been successful on the images taken by a PERCEPTRON P5000 laser range finder.
C1 OAK RIDGE NATL LAB,CTR ENGN SYST ADV RES,OAK RIDGE,TN 37831.
FACHHSCH WIESBADEN,WIESBADEN COMP INTEGRATED LAB,D-65917 WIESBADEN,GERMANY.
OI Rao, Nageswara/0000-0002-3408-5941
NR 9
TC 1
Z9 1
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0262-8856
J9 IMAGE VISION COMPUT
JI Image Vis. Comput.
PD MAR
PY 1996
VL 14
IS 2
BP 131
EP 134
DI 10.1016/0262-8856(95)01046-7
PG 4
WC Computer Science, Artificial Intelligence; Computer Science, Software
Engineering; Computer Science, Theory & Methods; Engineering, Electrical
& Electronic; Optics
SC Computer Science; Engineering; Optics
GA UU453
UT WOS:A1996UU45300004
ER
PT J
AU Wham, RM
Basaran, OA
Byers, CH
AF Wham, RM
Basaran, OA
Byers, CH
TI Wall effects on flow past solid spheres at finite Reynolds number
SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
LA English
DT Article
ID ELECTRIC-FIELD; STEADY
AB Axisymmetric, steady flow of a Newtonian fluid past a solid sphere that is either suspended in a tube by an upflowing liquid (the fluidized sphere problem) or falling in a tube (the falling sphere problem) is determined by finite element analysis. The new results show that several correlations for drag presented in the literature are inaccurate (i) for any value of the ratio of the diameter of the tube to that of the sphere, 1/lambda, when inertial effects are moderate (Re greater than or equal to 30) and (ii) for 1/lambda < 3.3 when Re is small. Two new correlations accounting for wall effects on drag for fluidized and falling spheres are presented that are valid when 0 less than or equal to Re less than or equal to 100 and 12.5 greater than or equal to 1/lambda greater than or equal to 1.42. The effects of lambda and Re on the onset of wake formation and wake characteristics are studied in detail. The results show that, as 1/lambda decreases, the Re for the onset of wake formation increases, whereas the length of the wake decreases. Calculations carried out to simulate the effect of a wire used to support a fluidized sphere show that experimental drag results are correct to within 3%.
RP Wham, RM (reprint author), OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831, USA.
NR 41
TC 28
Z9 28
U1 1
U2 4
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 MAR
PY 1996
VL 35
IS 3
BP 864
EP 874
DI 10.1021/ie950354c
PG 11
WC Engineering, Chemical
SC Engineering
GA TZ106
UT WOS:A1996TZ10600028
ER
PT J
AU Poston, JA
AF Poston, JA
TI A reduction in the spalling of zinc titanate desulfurization sorbents
through the addition of lanthanum oxide
SO INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
LA English
DT Article
ID H2S
AB Initial results of introducing La2O3 into zinc titanate, a potential regenerable desulfurization sorbent, to reduce the spalling of zinc titanate and other similar type mixed metal oxide sorbents used in hot coal-derived fuel gas desulfurization are presented. Sorbents were tested in a bench scale high temperature-low pressure fixed bed reactor using simulated coal-derived hot fuel gas and then removed for analysis. No signs of spalling or physical degradation after five cycles with steam regeneration was observed. The reactivity and capacity of the sorbent was comparable to standard zinc titanate sorbents. Primary analysis consisted, of scanning electron microscopy/energy dispersive spectroscopy, X-ray photoelectron spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, total sulfur analysis, and X-ray diffraction.
RP Poston, JA (reprint author), US DOE,MORGANTOWN ENERGY TECHNOL CTR,GASIFICAT CLEANUP PROJECTS DIV,POB 880,MORGANTOWN,WV 26505, USA.
NR 27
TC 24
Z9 27
U1 3
U2 3
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 MAR
PY 1996
VL 35
IS 3
BP 875
EP 882
DI 10.1021/ie950364d
PG 8
WC Engineering, Chemical
SC Engineering
GA TZ106
UT WOS:A1996TZ10600029
ER
PT J
AU Perry, RA
Miller, JA
AF Perry, RA
Miller, JA
TI An exploratory investigation of the use of alkali metals in nitrous
oxide control
SO INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
LA English
DT Article
ID GAS-PHASE KINETICS; NCO+NO REACTION; NITRIC-OXIDE; ISOCYANIC ACID;
CYANURIC ACID; RATE-CONSTANT; TEMPERATURE; N2O; NA; COMBUSTION
AB Using chemical kinetic modeling, we have investigated the feasibility of using sodium hydroxide (a representative alkali-metal compound) to control nitrous oxide emissions from combustion sources. The key reaction is
Na + N2O <----> NaO + N-2,
where the sodium atom is produced by the reaction
NaOH + H <----> Na + H2O
when small amounts of fuel are added to lean combustion products. Because sodium hydroxide is regenerated by
NaO + H2O <----> NaOH + OH,
one sodium atom is potentially capable of destroying several N2O molecules. The mechanism is discussed in detail. Moreover, we have studied the possibility of using NaOH in conjunction with RAPRENOX (cyanuric acid injection) to control NOx emissions without producing N2O as a by-product. The results are discussed at length. (C) 1996 John Wiley & Sons, Inc.
C1 SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551.
RP Perry, RA (reprint author), TECHNOR INC,LIVERMORE,CA 94550, USA.
NR 48
TC 32
Z9 33
U1 2
U2 7
PU JOHN WILEY & SONS INC
PI NEW YORK
PA 605 THIRD AVE, NEW YORK, NY 10158-0012
SN 0538-8066
J9 INT J CHEM KINET
JI Int. J. Chem. Kinet.
PD MAR
PY 1996
VL 28
IS 3
BP 217
EP 234
DI 10.1002/(SICI)1097-4601(1996)28:3<217::AID-KIN7>3.0.CO;2-Y
PG 18
WC Chemistry, Physical
SC Chemistry
GA TW133
UT WOS:A1996TW13300007
ER
PT J
AU Segev, A
Chatterjee, A
AF Segev, A
Chatterjee, A
TI A framework for object matching in federated databases and its
implementation
SO INTERNATIONAL JOURNAL OF COOPERATIVE INFORMATION SYSTEMS
LA English
DT Article
AB Manufacturing industries have recently started exploring the potential for sharing information across inter-organization database systems to increase productivity and gain strategic advantages. As manufacturing information is not well structured such systems bring together a diverse variety of databases that transcend organizational boundaries to include customers and suppliers. In this paper, we present a framework for object matching that uses rules and approximation schemes to support transparent user access to such heterogeneous databases. In the second part of the paper, we discuss how object matching can be implemented in an extensible DBMS. Several implementation options are described using the features supported by POSTGRES.
C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY NATL LAB, BERKELEY, CA 94720 USA.
BOND PORTFOLIO ANAL GRP SALOMON BROS INC, NEW YORK, NY 10048 USA.
RP Segev, A (reprint author), UNIV CALIF BERKELEY, WALTER A HAAS SCH BUSINESS, BERKELEY, CA 94720 USA.
NR 25
TC 5
Z9 5
U1 0
U2 0
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 0218-8430
J9 INT J COOP INF SYST
JI Int. J. Coop. Inf. Syst.
PD MAR
PY 1996
VL 5
IS 1
BP 73
EP 99
DI 10.1142/S021884309600004X
PG 27
WC Computer Science, Information Systems
SC Computer Science
GA UR081
UT WOS:A1996UR08100003
ER
PT J
AU DeAndres, MC
Hoo, E
Zangrando, F
AF DeAndres, MC
Hoo, E
Zangrando, F
TI Performance of direct-contact heat and mass exchangers with steam-gas
mixtures at subatmospheric pressures
SO INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
LA English
DT Article
AB Tests were conducted to determine the performance of direct-contact heat and mass exchangers containing structured packings in field applications. The exchangers tested serve as intercoolers-condensers between the various stages of a vacuum compression train that discharges the exhaust gases from a low-temperature power plant. The gases, which consist of low-pressure steam and a mixture of noncondensible gases, are contacted with seawater as the coolant. The structured packing is more commonly used as fill in evaporative cooling towers, which operate at atmospheric pressure. These tests were conducted at absolute pressures between 1.6 and 16 kPa, and noncondensible mass fractions between 0.1 and 0.9, significantly extending the existing data base on condensers. The new data show the effect of high noncondensible mass fractions and superheat on the heat and mass transfer process. The results indicate that these exchangers can be designed to condense the steam to within a few percent of the theoretical limits, while attaining small temperature approaches, and incurring low pressure drops. Useful approximations to estimate their performance are discussed. The data were also used to validate detailed computer models, which accurately predict the heat and mass transfer over the entire range tested. These models can now be used with confidence for engineering design of condensers in geothermal and conventional power plants.
C1 NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401.
NR 6
TC 2
Z9 2
U1 0
U2 5
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0017-9310
J9 INT J HEAT MASS TRAN
JI Int. J. Heat Mass Transf.
PD MAR
PY 1996
VL 39
IS 5
BP 965
EP 973
DI 10.1016/0017-9310(95)00173-5
PG 9
WC Thermodynamics; Engineering, Mechanical; Mechanics
SC Thermodynamics; Engineering; Mechanics
GA TQ137
UT WOS:A1996TQ13700001
ER
PT J
AU Schwenke, K
Peterson, HP
vonWangenheim, KH
Feinendegen, LE
AF Schwenke, K
Peterson, HP
vonWangenheim, KH
Feinendegen, LE
TI Radiation-enhanced differentiation of erythroid progenitor cells and its
relation to reproductive cell death
SO INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
LA English
DT Article
ID COLONY-FORMING ABILITY; LIVE MAMMALIAN-CELLS; NEUROBLASTOMA-CELLS;
CHROMOSOME-DAMAGE; HAMSTER CELLS; X-RAYS; CULTURE; ABERRATIONS;
IRRADIATION; INDUCTION
AB Terminally differentiated cells usually do not divide and are, thus, reproductively dead. To elucidate the significance of radiation-enhanced differentiation to reproductive cell death, murine erythroid progenitor cells were gamma-irradiated in plasma clot cultures and the development of haemoglobinized clones was studied thereafter. If irradiation occur-red when the cells had resumed proliferation, the total numbers of haemoglobinized clones and, in parallel, the numbers of newly haemoglobinized clones were elevated above control levels 6-24 h after 10-30 Gy and 24-48 h after 1 Gy respectively. Thereafter, clone numbers decreased below controls. This decrease was faster with the newly haemoglobinized clones, indicating that both the accumulation of haemoglobinized clones and fast exhaustion of the pool of more primitive precursors in the cultures are due to accelerated differentiation. The haemoglobinized clones appearing after irradiation were reduced in size without indication of direct cell death. We conclude that the reproductive cell death occurring in our system is due to enhancement of differentiation. Enhancement of differentiation is expressed by omission of cell cycles normally passed through by the cell progeny before terminal differentiation is reached. Dependence of differentiation enhancement on the presence of cycling cells at the time of irradiation indicates involvement of growth of essential cytoplasmic constituents during mitotic delay as observed in other cell systems.
C1 BROOKHAVEN NATL LAB, DEPT MED, UPTON LJ, NY 11973 USA.
RP Schwenke, K (reprint author), FORSCHUNGSZENTRUM JULICH, RES CTR, INST MED, D-52425 JULICH, GERMANY.
NR 39
TC 8
Z9 8
U1 0
U2 0
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0955-3002
J9 INT J RADIAT BIOL
JI Int. J. Radiat. Biol.
PD MAR
PY 1996
VL 69
IS 3
BP 309
EP 317
DI 10.1080/095530096145869
PG 9
WC Biology; Nuclear Science & Technology; Radiology, Nuclear Medicine &
Medical Imaging
SC Life Sciences & Biomedicine - Other Topics; Nuclear Science &
Technology; Radiology, Nuclear Medicine & Medical Imaging
GA UG522
UT WOS:A1996UG52200004
PM 8613680
ER
PT J
AU Rubin, MB
Elata, D
Attia, AV
AF Rubin, MB
Elata, D
Attia, AV
TI Modeling added compressibility of porosity and the thermomechanical
response of wet porous rock with application to Mt Helen tuff
SO INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
LA English
DT Article
ID ELASTIC-VISCOPLASTIC METALS; GRANULAR-MATERIALS; CONTINUUM THEORY;
MIXTURE THEORY; 2ND LAW; THERMODYNAMICS; DEFORMATION; COMPACTION; MEDIA
AB This paper is concerned with modeling the response of a porous brittle solid whose pores may be dry or partially filled with fluid. A form for the Helmholtz free energy is proposed which incorporates known Mie-Gruneisen constitutive equations for the nonporous solid and for the fluid, and which uses an Einstein formulation with variable specific heat. In addition, a functional form for porosity is postulated which depends on two material constants that control the added elastic compressibility of porosity observed in porous rock. The irreversible process of pore crushing is modeled using compaction and dilation surfaces to determine a scalar internal variable that measures unloaded porosity. Restrictions on constitutive assumptions for the composite of porous solid and fluid are obtained which ensure thermodynamic consistency. Examples show that although the added compressibility of porosity is determined by fitting data for dry MI. Helen tuff, the predicted responses of saturated and partially saturated tuff agree well with experimental data.
C1 LAWRENCE LIVERMORE NATL LAB,DIV EARTH SCI,LIVERMORE,CA 94550.
RP Rubin, MB (reprint author), TECHNION ISRAEL INST TECHNOL,FAC MECH ENGN,IL-32000 HAIFA,ISRAEL.
OI Elata, David/0000-0002-3816-6669
NR 46
TC 11
Z9 13
U1 1
U2 2
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0020-7683
J9 INT J SOLIDS STRUCT
JI Int. J. Solids Struct.
PD MAR
PY 1996
VL 33
IS 6
BP 761
EP 793
DI 10.1016/0020-7683(95)00077-N
PG 33
WC Mechanics
SC Mechanics
GA TK171
UT WOS:A1996TK17100001
ER
PT J
AU Kheyfets, A
Miller, WA
AF Kheyfets, A
Miller, WA
TI Initial-data formulation of tetrad gravity utilizing York's extrinsic
time approach
SO INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
LA English
DT Article
ID ASHTEKAR
AB An ability to analyze the geometrodynamic degrees of freedom and initial-data formulation is central to the canonical quantization of gravity. In the metric theory of gravity York provided the most powerful technique to analyze the dynamic degrees of freedom and to solve the initial-data problem. In this paper we extend York's analysis to tetrad gravity. Such an extension is necessary for the quantization of gravity when coupled to a half-integer-spin field. We present a comparative analysis of the geometric information carried by (1) a 3-metric of an initial hypersurface and (2) the spacelike triad of a time-gauged tetrad. We apply the tetrad initial-data formulation to Ashtekar's connection variables, and provide a comparison with other alternative choices of canonical tetrad variables.
C1 LOS ALAMOS NATL LAB,DIV THEORET,THEORET ASTROPHYS GRP T6MSB288,LOS ALAMOS,NM 87545.
USAF,PHILLIPS LAB,AFMC,ASTRODYNAM BRANCH,VTA,KIRTLAND AFB,NM 87117.
RP Kheyfets, A (reprint author), N CAROLINA STATE UNIV,DEPT MATH,BOX 8205,RALEIGH,NC 27695, USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU PLENUM PUBL CORP
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013
SN 0020-7748
J9 INT J THEOR PHYS
JI Int. J. Theor. Phys.
PD MAR
PY 1996
VL 35
IS 3
BP 697
EP 710
DI 10.1007/BF02082832
PG 14
WC Physics, Multidisciplinary
SC Physics
GA UC522
UT WOS:A1996UC52200015
ER
PT J
AU Klots, CE
AF Klots, CE
TI Some properties of microcanonical rate constants
SO INTERNATIONAL REVIEWS IN PHYSICAL CHEMISTRY
LA English
DT Review
ID ENERGY
AB An isolated body is characterized by conserved properties such as its energy and angular momentum. The rates of processes occurring in that body can thus be investigated as a function of these properties. On the other hand the rates may be better known, both conceptually and experimentally, as a function of temperature. This paper surveys relations between rate descriptions in the two domains, as deduced using steepest descent techniques. The rudiments of these techniques are given in an appendix.
RP Klots, CE (reprint author), OAK RIDGE NATL LAB,CHEM & BIOL PHYS SECT,POB 2008,OAK RIDGE,TN 37831, USA.
NR 26
TC 9
Z9 9
U1 0
U2 2
PU TAYLOR & FRANCIS LTD
PI LONDON
PA ONE GUNDPOWDER SQUARE, LONDON, ENGLAND EC4A 3DE
SN 0144-235X
J9 INT REV PHYS CHEM
JI Int. Rev. Phys. Chem.
PD MAR
PY 1996
VL 15
IS 1
BP 205
EP 217
DI 10.1080/01442359609353181
PG 13
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA UT901
UT WOS:A1996UT90100011
ER
PT J
AU Hirst, E
Tonn, B
AF Hirst, E
Tonn, B
TI Social goals and electric-utility deregulation
SO ISSUES IN SCIENCE AND TECHNOLOGY
LA English
DT Article
RP Hirst, E (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418
SN 0748-5492
J9 ISSUES SCI TECHNOL
JI Issues Sci. Technol.
PD SPR
PY 1996
VL 12
IS 3
BP 43
EP 47
PG 5
WC Engineering, Multidisciplinary; Engineering, Industrial;
Multidisciplinary Sciences; Social Issues
SC Engineering; Science & Technology - Other Topics; Social Issues
GA UE745
UT WOS:A1996UE74500030
ER
PT J
AU Tanaka, S
Kern, RS
Bentley, J
Davis, RF
AF Tanaka, S
Kern, RS
Bentley, J
Davis, RF
TI Defect formation during hetero-epitaxial growth of aluminum nitride thin
films on 6H-Silicon carbide by gas-source molecular beam epitaxy
SO JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES &
REVIEW PAPERS
LA English
DT Article
DE aluminum nitride; thin film; silicon carbide; transmission electron
microscopy; defect formation mechanisms; dislocations
ID ALN; AIN; DISLOCATIONS; BOUNDARIES; CRYSTALS; LAYER
AB Defect formation mechanisms in AlN thin films grown on 6H-SiC(0001) substrates have been investigated as a function of film thickness to 180 nm using conventional and high-resolution transmission electron microscopy (HRTEM). The presence of particular Si-terminated steps on the vicinal 6H-SiC surface caused the introduction of planar defects at the initial stage of growth. By contrast, micrographs of films deposited on the on-axis substrate showed a much lower density of defects. Atomistic structural models of the interface and deposited AlN are proposed based on the HRTEM images and the results of companion scanning tunneling microscopy (STM) studies of the vicinal 6H-SiC(0001) surface. The introduction of additional defects, which were primarily threading dislocations, was observed with increasing thickness of the AlN films.
C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831.
RP Tanaka, S (reprint author), N CAROLINA STATE UNIV,DEPT MAT SCI & ENGN,BOX 7907,RALEIGH,NC 27695, USA.
RI Davis, Robert/A-9376-2011
OI Davis, Robert/0000-0002-4437-0885
NR 39
TC 36
Z9 36
U1 1
U2 7
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 MAR
PY 1996
VL 35
IS 3
BP 1641
EP 1647
DI 10.1143/JJAP.35.1641
PG 7
WC Physics, Applied
SC Physics
GA UF790
UT WOS:A1996UF79000008
ER
PT J
AU Viswanathan, S
AF Viswanathan, S
TI Industrial applications of solidification technology - Commentary
SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY
LA English
DT Editorial Material
RP Viswanathan, S (reprint author), OAK RIDGE NATL LAB,DIV MET & CERAM,POB 2008,OAK RIDGE,TN 37831, USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086
SN 1047-4838
J9 JOM-J MIN MET MAT S
JI JOM-J. Miner. Met. Mater. Soc.
PD MAR
PY 1996
VL 48
IS 3
BP 19
EP 19
PG 1
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA UA869
UT WOS:A1996UA86900003
ER
PT J
AU Anderson, IE
Osborne, MG
Ellis, TW
AF Anderson, IE
Osborne, MG
Ellis, TW
TI The effects of solidification and atomization on rare-earth alloys -
Overview
SO JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY
LA English
DT Article
ID MAGNET
AB This article discusses the results of experiments involving the application of atomization techniques to the production of three selected rare-earth intermetallic (REI) materials. High-pressure gas atomization and centrifugal atomization into a rotating quench bath have been used to process the alloys. Rapid-solidification processing by atomization techniques is of great benefit since optimum performance of these REI materials demands chemical and structural homogeneity. The results demonstrate that such careful solidification microstructure control is required if the benefits of REI-alloy properties are to be realized with maximum processing efficiency.
RP Anderson, IE (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,MET & CERAM PROGRAM,122 MET DEV BLDG,AMES,IA 50011, USA.
NR 20
TC 7
Z9 7
U1 0
U2 1
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086
SN 1047-4838
J9 JOM-J MIN MET MAT S
JI JOM-J. Miner. Met. Mater. Soc.
PD MAR
PY 1996
VL 48
IS 3
BP 38
EP 42
PG 5
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering; Mineralogy; Mining & Mineral Processing
SC Materials Science; Metallurgy & Metallurgical Engineering; Mineralogy;
Mining & Mineral Processing
GA UA869
UT WOS:A1996UA86900008
ER
PT J
AU Strickland, JH
Higuchi, H
AF Strickland, JH
Higuchi, H
TI Parachute aerodynamics: An assessment of prediction capability
SO JOURNAL OF AIRCRAFT
LA English
DT Article
ID UNSTEADY-FLOW; SPHERES; STEADY; WAKE
RP Strickland, JH (reprint author), SANDIA NATL LABS,CTR ENGN SCI,TECH STAFF,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 68
TC 7
Z9 7
U1 0
U2 0
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091
SN 0021-8669
J9 J AIRCRAFT
JI J. Aircr.
PD MAR-APR
PY 1996
VL 33
IS 2
BP 241
EP 252
DI 10.2514/3.46930
PG 12
WC Engineering, Aerospace
SC Engineering
GA UD291
UT WOS:A1996UD29100001
ER
PT J
AU Banta, RM
Olivier, LD
Gudiksen, PH
Lange, R
AF Banta, RM
Olivier, LD
Gudiksen, PH
Lange, R
TI Implications of small-scale flow features to modeling dispersion over
complex terrain
SO JOURNAL OF APPLIED METEOROLOGY
LA English
DT Article
ID DOPPLER LIDAR
AB Small-scale, topographically forced wind systems often have a strong influence on flow over complex terrain. A problem is that these systems are very difficult to measure, because of their limited spatial and temporal extent. They can be important however, in the atmospheric transport of hazardous materials. For example, a nocturnal exit jet-a narrow stream of cold air-which flowed from Eldorado Canyon at the interface between the Rocky Mountains and the Colorado plains near the Rocky Flats Plant (RFP), swept over RFP for about 3 h in the middle of the night of 4-5 February 1991. It extended in depth from a few tens of meters to approximately 800 m above the ground. Because the jet was so narrow (2 km wide), it was poorly sampled by the meteorological surface mesonet, but it did prove to have an effect on the dispersion of tracer material released from RFP, producing a secondary peak in measured concentration to the southeast of RFP. The existence and behavior of the jet was documented by Environmental Technology Laboratory's Doppler lidar system, a scanning, active remote-sensing system that provides fine resolution wind measurements. The lidar was deployed as a part of a wintertime study of flow and dispersion in the RFP vicinity during February 1993.
The MATHEW-ADPIC atmospheric dispersion model was run using the case study data from this night. It consists of three major modules: an interpolation scheme; MATHEW, a diagnostic wind-flow algorithm that calculates a mass-consistent interpolated flow; and ADPIC, a diffusion algorithm. The model did an adequate job of representing the main lobe of the tracer transport, but the secondary lobe resulting from the Eldorado Canyon exit jet was absent from the model result. Because the jet was not adequately represented in the input data, it did not appear in the modeled wind field. Thus, the effects of the jet on the transport of tracer material were not properly simulated by the diagnostic model.
C1 LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
RP Banta, RM (reprint author), NOAA,ERL,ENVIRONM TECHNOL LAB,R-E-ET2,325 BROADWAY,BOULDER,CO 80303, USA.
RI Darby, Lisa/A-8037-2009; Banta, Robert/B-8361-2008
OI Darby, Lisa/0000-0003-1271-0643;
NR 36
TC 37
Z9 37
U1 1
U2 3
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693
SN 0894-8763
J9 J APPL METEOROL
JI J. Appl. Meteorol.
PD MAR
PY 1996
VL 35
IS 3
BP 330
EP 342
DI 10.1175/1520-0450(1996)035<0330:IOSSFF>2.0.CO;2
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA UB905
UT WOS:A1996UB90500003
ER
PT J
AU Spitzer, RC
Orzechowski, TJ
Phillion, DW
Kauffman, RL
Cerjan, C
AF Spitzer, RC
Orzechowski, TJ
Phillion, DW
Kauffman, RL
Cerjan, C
TI Conversion efficiencies from laser-produced plasmas in the extreme
ultraviolet regime
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID 4D-4F EMISSION RESONANCES; X-RAY-LITHOGRAPHY; LIGHT; ABSORPTION
AB The conversion efficiency of spectral emission from laser-irradiated solid targets was investigated for short wavelength source development. The plasma brightness was quantified using absolutely calibrated detectors for 20 materials and spectra were obtained between 50 and 200 Angstrom. Laser parameters such as wavelength, pulse length, intensity, and spot size were systematically varied to establish a comprehensive database for source optimization. Qualitative differences in the underlying dominant emission features as a function of atomic number and laser wavelength were observed that accounted for the relatively high spectral conversion efficiencies produced. In the specific case of Sn, a conversion efficiency greater than 0.8%/eV has been observed in the technologically important region of lambda = 134.0 Angstrom using a laser intensity of 1-2 X 10(11) W/cm(2).
RP Spitzer, RC (reprint author), LAWRENCE LIVERMORE NATL LAB,ADV MICROTECHNOL PROGRAM,LIVERMORE,CA 94550, USA.
NR 32
TC 117
Z9 118
U1 2
U2 12
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 1
PY 1996
VL 79
IS 5
BP 2251
EP 2258
DI 10.1063/1.361149
PG 8
WC Physics, Applied
SC Physics
GA TY119
UT WOS:A1996TY11900014
ER
PT J
AU Devine, RAB
Mathiot, D
Warren, WL
Aspar, B
AF Devine, RAB
Mathiot, D
Warren, WL
Aspar, B
TI O interstitial generation and diffusion in high temperature annealed
Si/SiO2/Si structures
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID SI-SIO2 INTERFACE; SILICON DIOXIDE; OXYGEN; SIO2; SIO2-FILMS;
ABSORPTION; STATES
AB The profile of oxygen atoms diffused from SiO2 films into Si substrates as interstitials during high temperature annealing has been studied by infrared absorption spectroscopy using O-18 as a tracer. The measured absorbance profile in the substrates can be explained in terms of a simple diffusion model in which the SiO2 layer acts as a reservoir of O and there is no energy barrier to diffusion across the Si/SiO2 interface. The driving force for diffusion is the temperature-dependent solubility of oxygen interstitials in the Si. We find evidence both for the outdiffusion of oxygen from the SiO, layer into the Si during extended annealing and retrodiffusion back into the SiO2 layer during temperature ramp down. From etchback profiling data on O interstitials we are able to revise the Arrhenius law for O diffusion in Si and obtain an activation energy of 2.57 eV and a preexponential factor of 0.22 cm(2) s(-1). It is further suggested that there is evidence for enhancement of the O diffusion coefficient in Si at low temperatures resulting from the presence of foreign species such as H. These observations are important in understanding the structure of a thermally grown SiO2/Si interface and annealing-induced degradation in Si-based devices. (C) 1996 American Institute of Physics.
C1 SANDIA NATL LABS,ADV MAT LAB,ALBUQUERQUE,NM 87185.
CTR ETUD GRENOBLE,DMEL,CEA TECHNOL AVANCEE,LETI,F-38054 GRENOBLE 09,FRANCE.
RP Devine, RAB (reprint author), FRANCE TELECOM,CTR NATL ETUD TELECOMMUN,BP 98,F-38243 MEYLAN,FRANCE.
RI MATHIOT, Daniel/E-7629-2010
OI MATHIOT, Daniel/0000-0003-2845-3776
NR 29
TC 31
Z9 31
U1 1
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 1
PY 1996
VL 79
IS 5
BP 2302
EP 2308
DI 10.1063/1.361155
PG 7
WC Physics, Applied
SC Physics
GA TY119
UT WOS:A1996TY11900020
ER
PT J
AU Stein, HJ
Medernach, JW
AF Stein, HJ
Medernach, JW
TI Oxygen-related vibrational modes produced in Czochralski silicon by
hydrogen plasma exposure
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID THERMAL DONORS
AB Plasma hydrogenation of Czochralski Si has been performed to investigate the introduction of Si-O stretch modes and their correlation with thermal donor formation. Plasma hydrogenation at 275 degrees C introduces a well-resolved vibrational absorption band at 1005 cm(-1), while absorption due to electronic excitations for thermal donors remains weak. We attribute this band to a Si-O precursor center for thermal donor formation, and suggest it is the oxygen dimer center discussed in other studies of oxygen in Si. Vibrational modes introduced at 990 and 1000 cm(-1) during post-hydrogenation furnace annealing at 400 degrees C correlate with thermal donors TD2 and TD3, respectively. Stretch frequencies for Si-O in thermal donor centers are compared to those for oxygen aggregates in oxygen-implanted and electron-irradiated Si.
RP Stein, HJ (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 20
TC 8
Z9 8
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 1
PY 1996
VL 79
IS 5
BP 2337
EP 2342
DI 10.1063/1.362658
PG 6
WC Physics, Applied
SC Physics
GA TY119
UT WOS:A1996TY11900025
ER
PT J
AU Ernst, P
Geng, C
Hahn, G
Scholz, F
Schweizer, H
Phillipp, F
Mascarenhas, A
AF Ernst, P
Geng, C
Hahn, G
Scholz, F
Schweizer, H
Phillipp, F
Mascarenhas, A
TI Influence of domain size on optical properties of ordered GaInP2
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID PHOTOLUMINESCENCE EXCITATION SPECTROSCOPY; LIGHT LASER-DIODES; BAND-GAP;
GA0.5IN0.5P; ALLOYS; GA0.52IN0.48P; DEPENDENCE
AB Using dark-field transmission electron microscopy images of ordered GaInP samples, we show how the ordering domain size depends on the growth temperature. Samples with different average domain sizes are compared with regard to their photoluminescence (PL) and excitation spectra. We find a close correlation between the size of the ordered domains and the relative intensity of the PL peak from band-band recombination compared with the rapidly shifting, below-band-gap luminescence emission. (C) 1996 American Institute of Physics.
C1 UNIV STUTTGART,INST PHYS 4,D-70550 STUTTGART,GERMANY.
MAX PLANCK INST MET RES,D-70569 STUTTGART,GERMANY.
RP Ernst, P (reprint author), NATL RENEWABLE ENERGY LAB,1617 COLE BLVD,GOLDEN,CO 80401, USA.
RI Hahn, Giso/D-3111-2013
NR 38
TC 56
Z9 56
U1 0
U2 2
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 1
PY 1996
VL 79
IS 5
BP 2633
EP 2639
DI 10.1063/1.361099
PG 7
WC Physics, Applied
SC Physics
GA TY119
UT WOS:A1996TY11900070
ER
PT J
AU Werner, PW
Schamiloglu, E
AF Werner, PW
Schamiloglu, E
TI Two-photon ionization of trimethylamine using KrF laser radiation
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID ELECTRON-BEAM; IONIZED CHANNEL; 248 NM; MOLECULES; BENZENE; ATOMS
AB The multiphoton ionization of a low-pressure (3 X 10(-5) Torr) fill of trimethylamine using an electron-beam pumped KrF laser has been studied. A microwave resonator probe was used to measure the resultant free-electron density. The scaling of electron density with the square of the incident laser intensity was verified in the low flux limit. The electron production decreased significantly from the 12 scaling at laser fluxes exceeding 4 MW/cm(2). These results are consistent with a simple two-photon model describing the interaction in the low flux limit and a saturation of the electron production in the high-flux limit. (C) 1996 American Institute of Physics.
C1 SANDIA NATL LABS,DIV 12324,ALBUQUERQUE,NM 87185.
RP Werner, PW (reprint author), UNIV NEW MEXICO,DEPT ELECT & COMP ENGN,ALBUQUERQUE,NM 87131, USA.
NR 19
TC 1
Z9 1
U1 0
U2 0
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-8979
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 1
PY 1996
VL 79
IS 5
BP 2728
EP 2731
DI 10.1063/1.361145
PG 4
WC Physics, Applied
SC Physics
GA TY119
UT WOS:A1996TY11900084
ER
PT J
AU Gusmao, MS
Mahan, GD
AF Gusmao, MS
Mahan, GD
TI Field-effect transistors as tunable infrared detectors
SO JOURNAL OF APPLIED PHYSICS
LA English
DT Article
ID 2ND-HARMONIC GENERATION; METAL-SURFACES
AB We present a theory of tunable infrared response in field-effect transistors. The linear alpha(omega) and second-order beta(omega) polarizability are calculated numerically as functions of frequency of an applied electric field. Transitions between electron subbands in the inversion layer cause resonances in the frequency response, which are tunable with a gate voltage. (C) 1996 American Institute of Physics.
C1 OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA.
INST CIENCIAS EXATAS, DEPT FIS, BR-69000 MANAUS, BRAZIL.
RP UNIV TENNESSEE, DEPT PHYS & ASTRON, KNOXVILLE, TN 37996 USA.
NR 20
TC 3
Z9 3
U1 0
U2 1
PU AMER INST PHYSICS
PI MELVILLE
PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
SN 0021-8979
EI 1089-7550
J9 J APPL PHYS
JI J. Appl. Phys.
PD MAR 1
PY 1996
VL 79
IS 5
BP 2752
EP 2754
PG 3
WC Physics, Applied
SC Physics
GA TY119
UT WOS:A1996TY11900088
ER
PT J
AU Wang, ZM
Visser, M
Ma, RM
Baumgartner, RN
Kotler, D
Gallagher, D
Heymsfield, SB
AF Wang, ZM
Visser, M
Ma, RM
Baumgartner, RN
Kotler, D
Gallagher, D
Heymsfield, SB
TI Skeletal muscle mass: Evaluation of neutron activation and dual-energy
X-ray absorptiometry methods
SO JOURNAL OF APPLIED PHYSIOLOGY
LA English
DT Article
DE computerized axial tomography; acquired immunodeficiency syndrome
ID PHOTON ABSORPTIOMETRY; ADIPOSE-TISSUE; BODY; TOMOGRAPHY; POTASSIUM;
VOLUME
AB Although skeletal muscle (Sill) is a major body component, whole body measurement methods remain limited and inadequately investigated. The aim of the present study was to evaluate the Burkinshaw in vivo neutron activation analysis (IVNA)-whole body K-40-counting and dual-energy X-ray absorptiometry (DXA) methods of estimating SM by comparison to adipose tissue-free SM measured using multiscan computerized axial tomography (CT). In the Burkinshaw method the potassium-to-nitrogen ratios of SM and non-SM lean tissue are assumed constant; in the DXA method the ratio of appendicular SM to total SM is assumed constant at 0.75. Seventeen healthy men [77.5 +/- 13.8 (SD) kg body wt] and eight men with acquired immunodeficiency syndrome (AIDS; 65.5 +/- 7.6 kg) completed CT, IVNA, and DXA studies. SM measured by CT was 34.4 +/- 6.2 kg for the healthy subjects and 27.2 +/- 4.0 kg for the AIDS patients. Compared with CT, the Burkinshaw method underestimated SM by an average of 6.9 kg (20.1%, P = 0.0001) and 6.3 kg (23.2%, P = 0.01) in the healthy men and the men with AIDS, respectively. The DXA method minimally overestimated SM in both groups (2.0 kg and 5.8% in healthy men, P = 0.001; 1.4 kg and 5.1% in men with AIDS, P = 0.16). This overestimate could be explained by a higher actual than assumed ratio of DXA-measured appendicular SM to total body SM (actual = 0.79 +/- 0.05, assumed = 0.75). The current study results reveal that large errors are present in the Burkinshaw SM method and that substantial refinements in the models that form the basis of this IVNA approach are needed. The model on which the DXA-SM method is based also needs further minor refinements, but this is a promising in vivo approach because of less radiation exposure and lower cost than the IVNA and CT methods.
C1 COLUMBIA UNIV, COLL PHYS & SURG, ST LUKES ROOSEVELT HOSP, OBES RES CTR, NEW YORK, NY 10025 USA.
BROOKHAVEN NATL LAB, DEPT MED, UPTON, NY 11973 USA.
AGR UNIV WAGENINGEN, DEPT HUMAN NUTR, WAGENINGEN, NETHERLANDS.
UNIV NEW MEXICO, SCH MED, CLIN NUTR LAB, ALBUQUERQUE, NM 87131 USA.
OI Gallagher, Dympna/0000-0003-1769-9754
FU NIA NIH HHS [R01-AG-13021.]
NR 19
TC 177
Z9 177
U1 0
U2 2
PU AMER PHYSIOLOGICAL SOC
PI BETHESDA
PA 9650 ROCKVILLE PIKE, BETHESDA, MD 20814 USA
SN 8750-7587
J9 J APPL PHYSIOL
JI J. Appl. Physiol.
PD MAR
PY 1996
VL 80
IS 3
BP 824
EP 831
PG 8
WC Physiology; Sport Sciences
SC Physiology; Sport Sciences
GA UE825
UT WOS:A1996UE82500017
PM 8964743
ER
PT J
AU Zhao, ZX
Fuciarelli, AF
Smith, RD
AF Zhao, ZX
Fuciarelli, AF
Smith, RD
TI Identification and characterization of radiation damaged products of
monophosphate nucleosides by on-line capillary isotachophoresis
electrospray ionization mass spectrometry
SO JOURNAL OF CAPILLARY ELECTROPHORESIS
LA English
DT Article
DE CITP; ESI-MS; CITP-tandem MS; deoxynucleosides monophosphate
ID PERFORMANCE LIQUID-CHROMATOGRAPHY; MULTIPLY-CHARGED OLIGONUCLEOTIDES;
DINUCLEOSIDE MONOPHOSPHATES; ZONE ELECTROPHORESIS; SEQUENCE ISOMER; BASE
DAMAGE; DNA DAMAGE; CHEMISTRY; D(TPAPCPG); INTERFACE
AB Analysis of trace levels of DNA damage as a biomarker of human exposure to radiation levels represents a significant challenge. Capillary isotachophoresis (CITP) is well suited for this application due to its high separation efficiency large sample loading capacity, and relative ease of interfacing with highly specific and sensitive mass spectrometric detectors. This study describes the use of reversed anionic CITP coupled on-line with electrospray ionization-mass spectrometry (ESI-MS) for tl-ie identification and characterization of small quantities of radiation induced damage to deoxynucleotide monophosphates. CITP with ESI-tandem MS also provides structural information on the nature of the damage in addition to the molecular weight. This approach has the attraction of allowing the direct on-line determination of damaged nucleotides, as well as the free bases and nucleosides, and avoids the need for sample hydrolysis and/or derivatization.
C1 MERCK RES LABS, W POINT, NY USA.
PACIFIC NW LAB, DEPT TOXICOL, RICHLAND, WA 99352 USA.
PACIFIC NE NATL LAB, RICHLAND, WA USA.
RI Smith, Richard/J-3664-2012
OI Smith, Richard/0000-0002-2381-2349
NR 41
TC 9
Z9 9
U1 1
U2 2
PU I S C TECHNICAL PUBLICATIONS, INC
PI SHELTON
PA 30 CONTROLS DR, BOX 828, SHELTON, CT 06484-0828
SN 1079-5383
J9 J CAPILLARY ELECTROP
JI J. Capillary Electrophor.
PD MAR-APR
PY 1996
VL 3
IS 2
BP 111
EP 116
PG 6
WC Biochemistry & Molecular Biology; Electrochemistry
SC Biochemistry & Molecular Biology; Electrochemistry
GA VP234
UT WOS:A1996VP23400007
PM 9384757
ER
PT J
AU Anderson, SL
Szanyi, J
Paffett, MT
Datye, AK
AF Anderson, SL
Szanyi, J
Paffett, MT
Datye, AK
TI Hydrogenolysis and isomerization of n-butane on low-index Pt single
crystals and polycrystalline Pt foil
SO JOURNAL OF CATALYSIS
LA English
DT Article
ID SUPPORTED PLATINUM CATALYSTS; SURFACE-STRUCTURE; TEMPERATURE-DEPENDENCE;
METAL PARTICLES; PT(111); ETHANE; CHEMISORPTION; REACTIVITY; EUROPT-1;
PROPANE
AB The hydrogenolysis and isomerization of n-butane over Pt(100) and Pt(111) single crystals and a polycrystalline Pt foil have been studied over a wide range of reaction temperatures (510-610 K) and hydrogen partial pressures (7.5-250 Torr), The activity and selectivity have both been determined as a function of temperature and hydrogen partial pressure, The more open Pt(100) surface was an order of magnitude more active than the close-packed Pt(111) surface, Hydrogenolysis selectivities were invariant with reaction temperature over the range studied, Hydrogen partial pressure affected both the activity and product distribution. Both single-crystal surfaces exhibit a decrease in the activity as the H-2 pressure is decreased below a critical amount and this decrease is directly attributable to the formation of a carbonaceous surface residue, The amount of isomerization was always less than the amount of hydrogenolysis regardless of the n-butane to hydrogen ratio or the reaction temperature. (C) 1996 Academic Press, Inc.
C1 LOS ALAMOS NATL LAB, DIV CHEM SCI & TECHNOL, LOS ALAMOS, NM 87545 USA.
RP Anderson, SL (reprint author), UNIV NEW MEXICO, DEPT CHEM & NUCL ENGN, ALBUQUERQUE, NM 87131 USA.
OI Datye, Abhaya/0000-0002-7126-8659
NR 30
TC 8
Z9 8
U1 0
U2 3
PU ACADEMIC PRESS INC ELSEVIER SCIENCE
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
SN 0021-9517
J9 J CATAL
JI J. Catal.
PD MAR
PY 1996
VL 159
IS 1
BP 23
EP 30
DI 10.1006/jcat.1996.0060
PG 8
WC Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA UF034
UT WOS:A1996UF03400003
ER
PT J
AU Kalyuzhnyi, YV
Cummings, PT
AF Kalyuzhnyi, YV
Cummings, PT
TI On the relation between the Wertheim's two-density integral equation
theory for associating fluids and Chandler-Silbey-Ladanyi integral
equation theory for site-site molecular fluids
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID DIRECTIONAL ATTRACTIVE FORCES; DIMERIZING HARD-SPHERES; SMITH-NEZBEDA
MODEL; PERTURBATION-THEORY; THERMODYNAMICS; APPROXIMATION; FORMALISM;
LIQUIDS
AB It is demonstrated that Chandler-Silbey-Ladanyi integral equation theory for the site-site molecular fluids is the limiting case of complete association of more general two-density integral equation theory for associating fluids developed by Wertheim. The analysis is presented for a site-site molecular system with any number and geometrical arrangement of the sites in the molecule and arbitrary type of the site-site pair interaction. (C) 1996 American Institute of Physics.
C1 OAK RIDGE NATL LAB,DIV CHEM TECHNOL,OAK RIDGE,TN 37831.
CONDENSED MATTER PHYS INST,LVOV 290011,UKRAINE.
RP Kalyuzhnyi, YV (reprint author), UNIV TENNESSEE,DEPT CHEM ENGN,KNOXVILLE,TN 37996, USA.
RI Cummings, Peter/B-8762-2013
OI Cummings, Peter/0000-0002-9766-2216
NR 31
TC 27
Z9 27
U1 0
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 1
PY 1996
VL 104
IS 9
BP 3325
EP 3328
DI 10.1063/1.471094
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TW809
UT WOS:A1996TW80900017
ER
PT J
AU Jaffe, JE
Hess, AC
AF Jaffe, JE
Hess, AC
TI Ab initio study of a CO monolayer adsorbed on the (10(1)over-bar-0)
surface of ZnO
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID HARTREE-FOCK; SOLIDS
AB Periodic Hartree-Fock total energy calculations on two-dimensionally periodic slabs have been used to predict the equilibrium geometry of a monolayer of carbon monoxide molecules adsorbed on the nonpolar (<10(1)over bar 0>) surface of ZnO. Two physisorbed (or weakly chemisorbed) minimum energy configurations are found. In one the CO molecules adsorb with their oxygen atoms coordinated to surface Zn atoms, while in the other the carbon atoms are coordinated to surface Zn atoms. The two calculated minima are very close in energy. In the second geometry, the C-Zn ''bond'' and the C-O bond make angles of 32.5 degrees and 39.5 degrees with the surface normal, and the intramolecular bond shortens slightly from its free value in reasonable agreement with experimental results. No binding of CO to the surface oxygen atoms is predicted. Surface-related changes in the vibrational frequencies for the adsorbed molecules agree reasonably well with infrared spectroscopic data, and the ''carbon-down'' binding energy of the molecule with the surface is in good agreement with thermal desorption data (though electron correlation effects have to be included in the calculation to obtain acceptable results for low surface coverage). (C) 1996 American Institute of Physics.
RP Jaffe, JE (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, RICHLAND, WA 99352 USA.
NR 11
TC 30
Z9 30
U1 1
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 1
PY 1996
VL 104
IS 9
BP 3348
EP 3351
DI 10.1063/1.471097
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TW809
UT WOS:A1996TW80900020
ER
PT J
AU Tammaro, M
Evans, JW
AF Tammaro, M
Evans, JW
TI Percolative diffusion of CO during CO oxidation on Pt(100)
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID KINETIC OSCILLATIONS; PHASE-TRANSITION; SURFACE; ADSORPTION; MICROSCOPY;
DYNAMICS; LATTICE
AB During CO-oxidation on Pt(100), CO diffuses in a ''disordered environment'' produced by a complex pattern of reconstructed and unreconstructed regions of the substrate. Macroscopic diffusion of CO is effectively only possible on percolating 1X1-regions of the substrate. We treat the spatio-temporal behavior observed in this reaction system accounting in the simple way for the percolative nature of CO-diffusion. This is done via incorporation into the reaction-diffusion equations of a suitable chemical diffusion coefficient, exploiting ideas from the theory of transport in disordered media. We use these equations to analyze the propagation of reactive, O-rich pulses into a CO-covered 1X1-background. (C) 1996 American Institute of Physics.
C1 IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011.
RP Tammaro, M (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,AMES,IA 50011, USA.
NR 30
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 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 1
PY 1996
VL 104
IS 9
BP 3386
EP 3390
DI 10.1063/1.471042
PG 5
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TW809
UT WOS:A1996TW80900025
ER
PT J
AU Heck, AJR
Zare, RN
Chandler, DW
AF Heck, AJR
Zare, RN
Chandler, DW
TI H/D fragment ratio in Lyman-alpha photolysis of CH2D2
SO JOURNAL OF CHEMICAL PHYSICS
LA English
DT Article
ID BOND BREAKING; PHOTODISSOCIATION; HOD; DYNAMICS
AB The photofragment imaging technique is used to study the formation of H and D in the photolysis of CH2D2. From the images different reaction channels are distinguished that lead to hydrogen fragments. For the channel that leads to hydrogen atoms concomitant with methyl fragments a H/D ratio of 3.5+/-0.6 is found. (C) 1996 American Institute of Physics.
C1 STANFORD UNIV,DEPT CHEM,STANFORD,CA 94305.
RP Heck, AJR (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA.
RI Zare, Richard/A-8410-2009; Heck, Albert/D-7098-2011
OI Heck, Albert/0000-0002-2405-4404
NR 25
TC 20
Z9 20
U1 0
U2 3
PU AMER INST PHYSICS
PI WOODBURY
PA CIRCULATION FULFILLMENT DIV, 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2999
SN 0021-9606
J9 J CHEM PHYS
JI J. Chem. Phys.
PD MAR 1
PY 1996
VL 104
IS 9
BP 3399
EP 3402
DI 10.1063/1.471045
PG 4
WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical
SC Chemistry; Physics
GA TW809
UT WOS:A1996TW80900028
ER
PT J
AU Mohandas, N
Paszty, C
AF Mohandas, N
Paszty, C
TI Sickle cell disease: A step closer to the dream
SO JOURNAL OF CLINICAL INVESTIGATION
LA English
DT Editorial Material
RP Mohandas, N (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY NATL LAB,DIV LIFE SCI,BERKELEY,CA 94720, USA.
NR 4
TC 1
Z9 1
U1 0
U2 0
PU ROCKEFELLER UNIV PRESS
PI NEW YORK
PA 222 E 70TH STREET, NEW YORK, NY 10021
SN 0021-9738
J9 J CLIN INVEST
JI J. Clin. Invest.
PD MAR 1
PY 1996
VL 97
IS 5
BP 1135
EP 1135
DI 10.1172/JCI118525
PG 1
WC Medicine, Research & Experimental
SC Research & Experimental Medicine
GA TZ805
UT WOS:A1996TZ80500001
PM 8636422
ER
PT J
AU Hart, WE
Istrail, SC
AF Hart, WE
Istrail, SC
TI Fast protein folding in the hydrophobic-hydrophilic model within
three-eighths of optimal
SO JOURNAL OF COMPUTATIONAL BIOLOGY
LA English
DT Article
ID GLOBULAR-PROTEINS; PRINCIPLES; COMPLEXITY; COPOLYMERS; ALGORITHMS;
STABILITY
AB We present performance-guaranteed approximation algorithms for the protein folding problem in the hydrophobic-hydrophilic model (Dill, 1985). Our algorithms are the first approximation algorithms in the literature with guaranteed performance for this model (Dill, 1994). The hydrophobic-hydrophilic model abstracts the dominant force of protein folding: the hydrophobic interaction. The protein is modeled as a chain of amino acids of length n that are of two types; H (hydrophobic, i.e., nonpolar) and P (hydrophilic, i.e., polar). Although this model is a simplification of more complex protein folding models, the protein folding structure prediction problem is notoriously difficult for this model. Our algorithms have linear (3n) or quadratic time and achieve a three-dimensional protein conformation that has a guaranteed free energy no worse than three-eighths of optimal. This result answers the open problem of Ngo et al. (1994) about the possible existence of an efficient approximation algorithm with guaranteed performance for protein structure prediction in any well-studied model of protein folding. By achieving speed and near-optimality simultaneously, our algorithms rigorously capture salient features of the recently proposed framework of protein folding by Sali et al. (1994). Equally important, the final conformations of our algorithms have significant secondary structure (antiparallel sheets, beta-sheets, compact hydrophobic core). Furthermore, hypothetical folding pathways can be described for our algorithms that fit within the framework of diffusion-collision protein folding proposed by Karplus and Weaver (1979). Computational limitations of algorithms that compute the optimal conformation have restricted their applicability to short sequences (length less than or equal to 90). Because our algorithms trade computational accuracy for speed, they can construct near-optimal conformations in linear time for sequences of any size.
C1 SANDIA NATL LABS, MASSIVELY PARALLEL COMP RES LAB, ALBUQUERQUE, NM 87185 USA.
NR 41
TC 42
Z9 43
U1 0
U2 1
PU MARY ANN LIEBERT INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 1066-5277
J9 J COMPUT BIOL
JI J. Comput. Biol.
PD SPR
PY 1996
VL 3
IS 1
BP 53
EP 96
DI 10.1089/cmb.1996.3.53
PG 44
WC Biochemical Research Methods; Biotechnology & Applied Microbiology;
Computer Science, Interdisciplinary Applications; Mathematical &
Computational Biology; Statistics & Probability
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Computer Science; Mathematical & Computational Biology; Mathematics
GA VB991
UT WOS:A1996VB99100004
PM 8697239
ER
PT J
AU Whalen, PP
AF Whalen, PP
TI Algebraic limitations on two-dimensional hydrodynamics simulations
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
AB Algebraic limitations imposed by the use of connected straightline segments to define meshes for hydrodynamics simulations in two-dimensional cylindrical geometries are shown. It is shown that in the simplest smooth isentropic flow of the spherical expansion of a gas with point symmetry, commonly, and currently, used finite difference, finite volume, or finite element staggered grid hydrodynamics equations cannot simultaneously preserve energy, entropy, and sphericity on an equal-angle R - Theta mesh. It is further shown why finite difference codes tend to preserve sphericity and entropy, while finite element codes tend to preserve sphericity and energy. Exact difference representations of interface (cell face) pressures and work terms and of the elements of the strain rate tensor in a cell are shown. (C) 1996 Academic Press, Inc.
RP Whalen, PP (reprint author), LOS ALAMOS NATL LAB,POB 1663,LOS ALAMOS,NM 87545, USA.
NR 16
TC 16
Z9 17
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 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAR 1
PY 1996
VL 124
IS 1
BP 46
EP 54
DI 10.1006/jcph.1996.0043
PG 9
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA UA066
UT WOS:A1996UA06600003
ER
PT J
AU Silver, RN
Roeder, H
Voter, AF
Kress, JD
AF Silver, RN
Roeder, H
Voter, AF
Kress, JD
TI Kernel polynomial approximations for densities of states and spectral
functions
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
ID MAXIMUM-ENTROPY; SYSTEMS; HOLE
AB Chebyshev polynomial approximations are an efficient and numerically stable way to calculate properties of the very large Hamiltonians important in computational condensed matter physics. The present paper derives an optimal kernel polynomial which enforces positivity of density of stales and spectral estimates, achieves the best energy resolution, and preserves normalization. This kernel polynomial method (KPM) is demonstrated for electronic structure and dynamic magnetic susceptibility calculations. For tight binding Hamiltonians of Si, we show how to achieve high precision and rapid convergence of the cohesive energy and vacancy formation energy by careful attention to the order of approximation. For disordered XXZ-magnets, we show that the KPM provides a simpler and more reliable procedure for calculating spectral functions than Lanczos recursion methods. Polynomial approximations to Fermi projection operators are also proposed. (C) 1996 Academic Press, Inc.
C1 UNIV BAYREUTH,LEHRSTUHL THEORET PHYS 1,D-95440 BAYREUTH,GERMANY.
RP Silver, RN (reprint author), LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545, USA.
NR 26
TC 103
Z9 103
U1 0
U2 8
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAR 1
PY 1996
VL 124
IS 1
BP 115
EP 130
DI 10.1006/jcph.1996.0048
PG 16
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA UA066
UT WOS:A1996UA06600008
ER
PT J
AU Strain, J
AF Strain, J
TI 2D vortex methods and singular quadrature rules
SO JOURNAL OF COMPUTATIONAL PHYSICS
LA English
DT Article
ID CONVERGENCE; EQUATIONS; ACCURACY
AB A new high-order vortex method for the 2D Euler equations is presented. The method eliminates smoothing by constructing a singular quadrature rule for the Biot-Savart law at each time step, using quadtrees and orthogonal polynomials. Theory and numerical experiments show that the method is accurate and efficient, yielding excellent long-term accuracy in almost optimal CPU time. (C) 1996 Academic Press, Inc.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
RP Strain, J (reprint author), UNIV CALIF BERKELEY,DEPT MATH,BERKELEY,CA 94720, USA.
NR 22
TC 8
Z9 8
U1 0
U2 2
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 0021-9991
J9 J COMPUT PHYS
JI J. Comput. Phys.
PD MAR 1
PY 1996
VL 124
IS 1
BP 131
EP 145
DI 10.1006/jcph.1996.0049
PG 15
WC Computer Science, Interdisciplinary Applications; Physics, Mathematical
SC Computer Science; Physics
GA UA066
UT WOS:A1996UA06600009
ER
PT J
AU Nordqvist, AW
Tsang, YW
Tsang, CF
Dverstorp, B
Andersson, J
AF Nordqvist, AW
Tsang, YW
Tsang, CF
Dverstorp, B
Andersson, J
TI Effects of high variance of fracture transmissivity on transport and
sorption at different scales in a discrete model for fractured rocks
SO JOURNAL OF CONTAMINANT HYDROLOGY
LA English
DT Article
ID APERTURE CHANNEL MODEL; TRACER TRANSPORT; SINGLE FRACTURE; 3-DIMENSIONAL
NETWORKS; FIELD OBSERVATIONS; STOCHASTIC-MODEL; FLUID-FLOW; MEDIA;
CALIBRATION; VALIDATION
AB A three-dimensional (3-D) variable-aperture fracture network model for flow and transport in fractured crystalline rocks has been applied to study the effects of large variability in fracture transmissivity on non-sorbing and sorbing tracer transport, and scale effects in transport distance. The variable-aperture character of the fractures is introduced into a 3-D network model through a library of single-fracture permeabilities and associated particle transport residence time spectra. Sorption onto the fracture walls is added by a mathematical model for linear sorption. The resulting variable-aperture fracture network model, VAPFRAC, can handle flow and transport from single-fracture scale to the multiple-fracture scale. The model produces multi-peak transport breakthrough curves even for relatively moderate values of the fracture transmissivity variance. These breakthrough curves display dispersion on two different scales in the same way as has been observed in several field experiments conducted in crystalline rocks. The multi-peak structure is due to so-called channeling. For high values of the fracture transmissivity variance the solute transport is unevenly distributed and the channeling effects are more prominent.
The effect of linear sorption is not just a simple translation in mean residence time as in a homogeneous medium. The dispersion characteristics of the breakthrough curves also change when linear sorption is included. The degree of the change depends strongly on the fracture transmissivity variance, as does the translation, In particular, with a high fracture transmissivity variance the translation in mean residence time due to sorption is significantly smaller compared to the cases with a low fracture transmissivity variance. Finally, the high variability in the model output data suggests that extrapolation of results from a particular tracer experiment will be highly uncertain.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV EARTH SCI,BERKELEY,CA 94720.
SWEDISH NUCL POWER INSPECTORATE,S-10658 STOCKHOLM,SWEDEN.
RP Nordqvist, AW (reprint author), ROYAL INST TECHNOL,S-10044 STOCKHOLM,SWEDEN.
NR 54
TC 38
Z9 39
U1 0
U2 10
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-7722
J9 J CONTAM HYDROL
JI J. Contam. Hydrol.
PD MAR
PY 1996
VL 22
IS 1-2
BP 39
EP 66
DI 10.1016/0169-7722(95)00064-X
PG 28
WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources
SC Environmental Sciences & Ecology; Geology; Water Resources
GA UH869
UT WOS:A1996UH86900003
ER
PT J
AU Hoffman, F
Ronen, D
Pearl, Z
AF Hoffman, F
Ronen, D
Pearl, Z
TI Evaluation of flow characteristics of a sand column using magnetic
resonance imaging
SO JOURNAL OF CONTAMINANT HYDROLOGY
LA English
DT Article
ID POROUS-MEDIA
AB Magnetic resonance imaging (MRI) was used to evaluate a column designed to conduct contaminant retardation tests on geological materials under saturated conditions. MRI procedures revealed sediment heterogeneities and preferential flow pathways inherent in the sediments as well as those created in the packing of the column. Sequential MRI images were also used to estimate tracer flow velocities and to detect density flows driven by density differences of as little as 0.0013 g/ml. Interpretation of the images emphasized the importance of small changes in hydraulic conductivity and of column orientation in experiments with fluids of different densities. MRI analysis during column flow experiments holds promise as a measurement technique to estimate retardation factors for selected solutes.
C1 WEIZMANN INST SCI,DEPT ENVIRONM SCI & ENERGY RES,IL-76100 REHOVOT,ISRAEL.
RP Hoffman, F (reprint author), LAWRENCE LIVERMORE NATL LAB,ENVIRONM PROTECT DEPT,LIVERMORE,CA 94550, USA.
NR 15
TC 27
Z9 27
U1 0
U2 1
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0169-7722
J9 J CONTAM HYDROL
JI J. Contam. Hydrol.
PD MAR
PY 1996
VL 22
IS 1-2
BP 95
EP 107
DI 10.1016/0169-7722(95)00079-8
PG 13
WC Environmental Sciences; Geosciences, Multidisciplinary; Water Resources
SC Environmental Sciences & Ecology; Geology; Water Resources
GA UH869
UT WOS:A1996UH86900006
ER
PT J
AU Zach, FX
Haller, EE
Gabbe, D
Iseler, G
Bryant, GG
Bliss, DF
AF Zach, FX
Haller, EE
Gabbe, D
Iseler, G
Bryant, GG
Bliss, DF
TI Electrical properties of the hydrogen defect in InP and the microscopic
structure of the 2316 cm(-1) hydrogen related line
SO JOURNAL OF ELECTRONIC MATERIALS
LA English
DT Article
DE deuterium; hydrogen; InP bulk growth
ID DEUTERON-IMPLANTED INP; ATMOSPHERE; PROTON; MODES; DEEP
AB We have studied the microscopic structure of a hydrogen related defect by measuring its vibrational IR absorption at 2315.6 cm(-1) in bulk InP crystals doped with deuterium. In contrast to the spectrum observed in nominally undoped samples (with only hydrogen present), the 2315.6 cm(-1) line in these samples containing both hydrogen and deuterium is split into at least three components approximately 0.5 cm(-1) apart. This can be explained if the defect contains more than one hydrogen atom; the additional lines are caused by mixed vibrational modes containing various combinations of hydrogen and deuterium. We present evidence that the formation of defect-hydrogen complexes leads to creation of a shallow intrinsic donor which can be annihilated under certain annealing conditions.
C1 PARKE MATH LABS,LOWELL,MA 01854.
MIT,LINCOLN LAB,LEXINGTON,MA 02173.
USAF,ROME LAB,BEDFORD,MA 01731.
RP Zach, FX (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA.
NR 17
TC 19
Z9 19
U1 0
U2 1
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086
SN 0361-5235
J9 J ELECTRON MATER
JI J. Electron. Mater.
PD MAR
PY 1996
VL 25
IS 3
BP 331
EP 335
DI 10.1007/BF02666597
PG 5
WC Engineering, Electrical & Electronic; Materials Science,
Multidisciplinary; Physics, Applied
SC Engineering; Materials Science; Physics
GA TY346
UT WOS:A1996TY34600003
ER
PT J
AU Aceves, SM
AF Aceves, SM
TI An analytical comparison of adsorption and vapor compression air
conditioners for electric vehicle applications
SO JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
LA English
DT Article
ID HEAT-PUMP
AB This paper shows an analysis of the applicability of an adsorption system for electric vehicle (EV) air conditioning. Adsorption systems are designed and optimized to provide the required cooling for four combinations of vehicle characteristics and driving cycles. The resulting adsorption systems are compared with vapor compression air conditioners that can satisfy the cooling load. The objective function is the overall system weight, which includes the cooling system weight and the weight of the battery necessary to provide energy for air conditioner operation. The system with the minimum overall weight is considered to be the best. The results show the optimum values of all the variables, as well as temperatures and amounts adsorbed, for the adsorption and desorption processes. The results indicate that for the conditions analyzed in this paper, vapor compression air conditioners are superior to adsorption systems, not only because they are lighter, but also because they have a higher COP and are move compact.
RP Aceves, SM (reprint author), UNIV CALIF,LAWRENCE LIVERMORE NATL LAB,POB 808,L-640,LIVERMORE,CA 94551, USA.
RI aceves, salvador/G-9052-2011
OI aceves, salvador/0000-0001-5687-7256
NR 19
TC 12
Z9 12
U1 0
U2 9
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 MAR
PY 1996
VL 118
IS 1
BP 16
EP 21
DI 10.1115/1.2792686
PG 6
WC Energy & Fuels
SC Energy & Fuels
GA UD463
UT WOS:A1996UD46300004
ER
PT J
AU Fossum, AF
Munson, DE
AF Fossum, AF
Munson, DE
TI Probabilistic creep analysis of underground structures in salt
SO JOURNAL OF ENGINEERING MECHANICS-ASCE
LA English
DT Article
ID RELIABILITY; INTEGRATION
AB A probabilistic creep analysis is made of an underground shaft in salt in support of performance-assessment activities of the Waste Isolation Pilot Plant (WIPP) Project. The finite-element method, coupled with an advanced reliability technique, is used to perform the analysis. Randomness due to uncertainties in creep properties is addressed. The results clearly demonstrate the utility of the advanced reliability approach in making complex underground probabilistic creep analyses.
C1 SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
RP Fossum, AF (reprint author), RE SPEC INC,POB 725,RAPID CITY,SD 57709, USA.
NR 25
TC 2
Z9 2
U1 0
U2 2
PU ASCE-AMER SOC CIVIL ENG
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017-2398
SN 0733-9399
J9 J ENG MECH-ASCE
JI J. Eng. Mech.-ASCE
PD MAR
PY 1996
VL 122
IS 3
BP 209
EP 217
DI 10.1061/(ASCE)0733-9399(1996)122:3(209)
PG 9
WC Engineering, Mechanical
SC Engineering
GA TX575
UT WOS:A1996TX57500004
ER
PT J
AU Lin, TF
Little, JC
Nazaroff, WW
AF Lin, TF
Little, JC
Nazaroff, WW
TI Transport and sorption of organic gases in activated carbon
SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
LA English
DT Article
ID FIXED-BED ADSORPTION; MASS-TRANSFER; PACKED-BEDS; DISPERSION; DIFFUSION;
PARTICLE; SYSTEMS; CURVES; MODEL
AB The relationships among adsorption-desorption kinetics, equilibrium partitioning, and fixed-column breakthrough curves are elucidated for airborne benzene and vinyl chloride on activated carbon grains and fibers. An electrobalance is used to measure adsorption/desorption kinetics and to obtain equilibrium partitioning data; column experiments are conducted to determine additional equilibrium partitioning data and to measure breakthrough curves. A porous sphere/cylinder intragrain diffusion model, coupled with a Freundlich isotherm to describe equilibrium partitioning, conforms closely to the experimental kinetic data for both adsorption and desorption. In addition, it is shown that the adsorption isotherm may be accurately predicted based on the asymmetry between adsorption and desorption rates measured in a single kinetic experiment. The parameters extracted from the kinetic experiment, when combined with the appropriate transport equations, can be used to accurately forecast column breakthrough curves.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY NAT LAB,DIV ENERGY & ENVIRONM,INDOOR ENVIR PROGRAM,BERKELEY,CA 94720.
VIRGINIA POLYTECH INST & STATE UNIV,BLACKSBURG,VA 24061.
RI Lin, Tsair-Fuh/C-4056-2008; Little, John/B-4154-2009; Lucas,
Elizabeth/E-2733-2010; Nazaroff, William/C-4106-2008
OI Lin, Tsair-Fuh/0000-0002-2439-9090; Nazaroff,
William/0000-0001-5645-3357
NR 21
TC 19
Z9 19
U1 1
U2 6
PU ASCE-AMER SOC CIVIL ENG
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 MAR
PY 1996
VL 122
IS 3
BP 169
EP 175
DI 10.1061/(ASCE)0733-9372(1996)122:3(169)
PG 7
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA TX430
UT WOS:A1996TX43000003
ER
PT J
AU Lin, TF
Nazaroff, WW
AF Lin, TF
Nazaroff, WW
TI Transport and sorption of water vapor in activated carbon
SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
LA English
DT Article
ID SURFACE-DIFFUSION; ADSORPTION; DYNAMICS; PARTICLE; DIOXIDE; GAS
AB Control of organic vapors by adsorption on activated carbon can be impacted by the presence of water vapor in the gas stream. As a foundation to better understand this issue, the transport and sorption of water vapor within activated carbon grains was studied. Adsorption/desorption kinetics and equilibrium partitioning of water between gas and sorbed phases were determined at relative humidities (RH) in the range of 0-86% and at 20 degrees C using an electrobalance. A model that accounts for transport within grains by pore and surface diffusion was used to interpret the sorption kinetic data. The model assumes instantaneously attained local equilibrium between sorbed and gas phases within the pores, based on a piecewise-linear isotherm measured for a small ensemble of activated carbon grains. Despite the complicated observed shape of the isotherms, including hysteresis, the model conforms well to all of the experimental data, and the asymmetry between adsorption and desorption is well resolved. The model results indicate that gas-phase diffusion dominates transport through the pores at RH less than or equal to 60%. Surface diffusion is found to be important at higher RH values.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV ENERGY & ENVIRONM,INDOOR ENVIR PROGRAM,BERKELEY,CA 94720.
RI Lin, Tsair-Fuh/C-4056-2008; Nazaroff, William/C-4106-2008
OI Lin, Tsair-Fuh/0000-0002-2439-9090; Nazaroff,
William/0000-0001-5645-3357
NR 24
TC 12
Z9 12
U1 0
U2 11
PU ASCE-AMER SOC CIVIL ENG
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 MAR
PY 1996
VL 122
IS 3
BP 176
EP 182
DI 10.1061/(ASCE)0733-9372(1996)122:3(176)
PG 7
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA TX430
UT WOS:A1996TX43000004
ER
PT J
AU Cheng, MD
Gao, N
Hopke, PK
AF Cheng, MD
Gao, N
Hopke, PK
TI Source apportionment study of nitrogen species measured in southern
California in 1987
SO JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
LA English
DT Article
ID BALANCE RECEPTOR MODEL; AIR-QUALITY; PARTICULATE SULFATE; SOURCE
REGIONS; LOS-ANGELES; ATMOSPHERE; POLLUTANTS; POLLUTION; NITRATE
AB A novel receptor-oriented methodology has been developed to apportion source contributions of the nitrogen species measured in the south coast air quality basin (SoCAB) in the 1987 southern California air quality study (SCAQS). This method begins by calculating a conditional probability field [potential source contribution function (PSCF)] relating the probability of a 5 km by 5 km area to observed high concentrations at a receptor site. Comparison of the locations of known sources with areas of high PSCF values indicates the power of the PSCF results. The source contribution of a grid cell (i.e., a source area) was then computed by multiplying the available emissions inventory emissions rate by the PSCF value and including the contributions from the species into which the emitted compounds could be transformed. The probability weighted emission rate can then be interpreted in terms of source contribution ''as observed'' at the receptor site. The estimated source contribution includes the atmospheric transport, removal, and transformation processes. The PSCF-constructed source apportionment map could be effective in the design of emission control strategies than emission inventory values, because the PSCF results indicate the actual impact of each grid source on the total amount of material received at the receptor site.
C1 CLARKSON UNIV,DEPT CHEM,POTSDAM,NY 13699.
RP Cheng, MD (reprint author), OAK RIDGE NATL LAB,4500N,MS 6200,OAK RIDGE,TN 37831, USA.
RI Cheng, Meng-Dawn/C-1098-2012; Hopke, Philip/C-6020-2008;
OI Hopke, Philip/0000-0003-2367-9661; Cheng, Meng-Dawn/0000-0003-1407-9576
NR 26
TC 23
Z9 23
U1 0
U2 3
PU ASCE-AMER SOC CIVIL ENG
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 MAR
PY 1996
VL 122
IS 3
BP 183
EP 190
DI 10.1061/(ASCE)0733-9372(1996)122:3(183)
PG 8
WC Engineering, Environmental; Engineering, Civil; Environmental Sciences
SC Engineering; Environmental Sciences & Ecology
GA TX430
UT WOS:A1996TX43000005
ER
PT J
AU Koetsier, P
Bryan, CF
AF Koetsier, P
Bryan, CF
TI Is macroinvertebrate drift a density-dependent mechanism of the benthos
in the lower Mississippi River?
SO JOURNAL OF FRESHWATER ECOLOGY
LA English
DT Article
ID INVERTEBRATE DRIFT; STREAM; SIZE; PREDATION; SCULPINS; INSECTS; TROUT
AB In the lower Mississippi River, we sampled drifting and benthic macroinvertebrates each month from November, 1984 to June, 1985. Drift was dominated by hydroids, Chaoborous punctipennis (Diptera), Taphromysis louisianae (Mysidacea), and decapod shrimp. The chief components of the benthic community were tubificid oligochaetes and chironomids. The species composition of the drift was significantly different from that of the benthos, for all but one month, We concluded that drift is not a density-dependent function of the bottom fauna in the lower Mississippi River. This information adds strength to the argument that, in very large rivers, drift may be a separate community from the benthos.
C1 LOUISIANA STATE UNIV,US NATL BIOL SERV,LOUISIANA COOPERAT FISHERIES RES UNIT,BATON ROUGE,LA 70803.
RP Koetsier, P (reprint author), SAVANNAH RIVER ECOL LAB,DIV WETLANDS ECOL,DRAWER E,AIKEN,SC 29802, USA.
NR 38
TC 6
Z9 7
U1 1
U2 4
PU OIKOS PUBL INC
PI LA CROSSE
PA PO BOX 2558, LA CROSSE, WI 54601
SN 0270-5060
J9 J FRESHWATER ECOL
JI J. Freshw. Ecol.
PD MAR
PY 1996
VL 11
IS 1
BP 1
EP 10
DI 10.1080/02705060.1996.9663488
PG 10
WC Ecology; Limnology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA TX219
UT WOS:A1996TX21900001
ER
PT J
AU Angelopoulos, V
Coroniti, FV
Kennel, CF
Kivelson, MG
Walker, RJ
Russell, CT
McPherron, RL
Sanchez, E
Meng, CI
Baumjohann, W
Reeves, GD
Belian, RD
Sato, N
FriisChristensen, E
Sutcliffe, PR
Yumoto, K
Harris, T
AF Angelopoulos, V
Coroniti, FV
Kennel, CF
Kivelson, MG
Walker, RJ
Russell, CT
McPherron, RL
Sanchez, E
Meng, CI
Baumjohann, W
Reeves, GD
Belian, RD
Sato, N
FriisChristensen, E
Sutcliffe, PR
Yumoto, K
Harris, T
TI Multipoint analysis of a bursty bulk flow event on April 11, 1985
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID SHEET BOUNDARY-LAYER; TAIL CURRENT DISRUPTION; NEAR-EARTH MAGNETOTAIL;
CENTRAL PLASMA SHEET; MAGNETOSPHERIC SUBSTORMS; ION DISTRIBUTIONS;
MAGNETIC-FIELD; AUREOL-3 OBSERVATIONS; GEOMAGNETIC TAIL; MODEL
AB In an attempt to place short-lived, high-speed magnetotail flows termed bursty bulk flow events (BBFs) in the context of substorm phenomenology we analyze one such event that took place on April 11, 1985, using data from several spacecraft and many ground stations. The substorm onset, which took place at 0127 UT, had a meridian 2 hours of local time east of AMPTE/IRM. The satellite did not detect high-speed flows at that time. A high-latitude (similar to 70 degrees corrected geomagnetic) substorm intensification took place at 0202 UT centered similar to 0.5 hour of local time west of the AMPTE/IRM meridian. The ISEE 2 satellite at the magnetotail lobe and the LANL 019 satellite at geosynchronous altitude were both at the same meridian as AMPTE/IRM at the time. The 0202 UT substorm intensification was associated with (1) a dipolarization at the ISEE 2 satellite at 0200:30 UT, (2) a BBF onset at AMPTE/IRM at 0202 UT accompanied by an intense dipolarization consistent with current wedge formation; (3) an energetic particle injection at geosynchronous altitude that took place at 0204 UT. The plasma acceleration region associated with this substorm intensification was estimated to be similar to 8 R(E) tailward of AMPTE/IRM. Thus, during this activity the BBF event was due to an observed tail collapse Earthward of X similar to-26 R(E). The Earthward energy transport measured at AMPTE/IRM can account for the expected magnetospheric power consumption if the BBF has a cross-sectional area of only 1-2 R(E)(2) in the Y-Z direction. E Similarly, the Earthward magnetic flux transport rate measured at AMPTE/IRM during the BBF event can result in a potential drop comparable to the expected transpolar cap potential if the BBF event has a size of 1-2 R(E) in the Y direction. The large amounts of flux transport measured past the satellite necessitate the existence of lobe flux reconnection tailward of AMPTE/IRM. The above results assume the validity of the frozen-in condition over the similar to 10-min duration of the BBF event. Although activity continued in the ionosphere and the ring current for well over 1.5 hours after the 0202 UT substorm intensification, most of the earthward energy and magnetic flux transport past IRM had ceased similar to 10 min after the BBF onset. We propose that the fast flows transport and pile up magnetic flux through a very narrow (a few R(E) in Y extent) flow channel in the midtail to the edge of an expanding dipolarization front in the near-Earth region. After the plasma sheet dipolarizes at a given location enhanced flux transport ceases, resulting in an apparent short (10-min timescale) duration of the fast flows. Unlike the near-Earth plasma sheet, which dipolarizes across many hours of local time, the midtail plasma sheet may exhibit longitudinally localized dipolarization. This may explain the often observed lack of one-to-one correlation between midtail activity and substorms.
C1 MAX PLANCK INST EXTRATERR PHYS,W-8046 GARCHING,GERMANY.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024.
DANISH INST FUNDAMENTAL METROL,DK-2100 COPENHAGEN,DENMARK.
BRITISH GEOL SURVEY,EDINBURGH EH9 3LA,MIDLOTHIAN,SCOTLAND.
UNIV CALIF LOS ANGELES,INST GEOPHYS & PLANETARY PHYS,LOS ANGELES,CA 90024.
NATL INST POLAR RES,BRANCH UPPER ATMOSPHERE PHYS,ITABASHI KU,TOKYO 173,JAPAN.
CSIR,HERMANUS MAGNET OBSERV,HERMANUS 7200,SOUTH AFRICA.
NAGOYA UNIV,SOLAR TERR ENVIRONM LAB,TOYOKAWA 442,JAPAN.
RP Angelopoulos, V (reprint author), JOHNS HOPKINS UNIV,APPL PHYS LAB,JOHNS HOPKINS RD,LAUREL,MD 20723, USA.
RI Baumjohann, Wolfgang/A-1012-2010; Kivelson, Margaret/I-9019-2012;
Sutcliffe, Peter/E-8124-2014; Reeves, Geoffrey/E-8101-2011;
OI Baumjohann, Wolfgang/0000-0001-6271-0110; Kivelson,
Margaret/0000-0003-3859-8581; Reeves, Geoffrey/0000-0002-7985-8098;
Russell, Christopher/0000-0003-1639-8298
NR 79
TC 153
Z9 156
U1 0
U2 6
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009
SN 0148-0227
J9 J GEOPHYS RES
JI J. Geophys. Res-Space Phys.
PD MAR 1
PY 1996
VL 101
IS A3
BP 4967
EP 4989
DI 10.1029/95JA02722
PG 23
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA TY349
UT WOS:A1996TY34900019
ER
PT J
AU Feldman, WC
Symbalisty, EMD
RousselDupre, RA
AF Feldman, WC
Symbalisty, EMD
RousselDupre, RA
TI Hard X ray survey of energetic electrons from low-Earth orbit
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID RADIATION BELT ELECTRONS; GROUND-BASED TRANSMITTER; CYCLOTRON-RESONANCE;
VLF SIGNALS; PRECIPITATION; EMISSIONS; WAVES; BREMSSTRAHLUNG;
MAGNETOSPHERE; PROPAGATION
AB Hard X ray and neutron emissions measured in low-Earth orbit are surveyed to develop a global overview of lightning-related energetic-electron precipitation and acceleration processes. Comparison of geographic intensity maps shows the dominance of enhanced hard X ray intensities measured when the satellite was above the continental United States and above the southern Indian Ocean between Madagascar and Australia. This emission is most enhanced during the northern summer months. Lesser although significant enhancements are seen between the Middle East and the Tibetan Plateau, a stretch of ocean off the east Asian coast between the Philippines and Korea, a stretch of equatorial Africa from the Ivory Coast to Mozambique, a region of the eastern equatorial Pacific just west of Columbia, and a patch of the Indian Ocean stretching between the southern tip of India and Indonesia. Although emissions from many of these regions are generally enhanced during the northern summer and fall seasons, none show any regularity relative to local time of day. Many but not all of these enhancements support natural interpretations in terms of lighting-induced energetic-electron precipitation from the terrestrial trapped radiation belts. Electron scattering induced by radio waves from VLF transmitters most likely contributes to this precipitation.
RP Feldman, WC (reprint author), LOS ALAMOS NATL LAB, MS-D466, GRP NIS-1, LOS ALAMOS, NM 87545 USA.
NR 45
TC 7
Z9 7
U1 0
U2 0
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD MAR 1
PY 1996
VL 101
IS A3
BP 5195
EP 5209
DI 10.1029/95JA03393
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA TY349
UT WOS:A1996TY34900037
ER
PT J
AU Feldman, WC
Symbalisty, EMD
RousselDupre, RA
AF Feldman, WC
Symbalisty, EMD
RousselDupre, RA
TI Survey of discrete hard X ray enhancements observed from low-Earth orbit
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID ENERGETIC ELECTRON-PRECIPITATION; GROUND-BASED TRANSMITTER;
CYCLOTRON-RESONANCE; LINE RADIATION; ELF EMISSIONS; EVENTS;
BREMSSTRAHLUNG; DISTRIBUTIONS; MAGNETOSPHERE; BURSTS
AB Systematics of discrete hard X ray enhancements detected using the Army Background Experiment between April 1990 and October 1992 are presented. A total of 822 enhancement events were detected, most often within two bands pf geomagnetic latitude that overlay (1) the inner trapped radiation belt and (2) the slot between inner and outer radiation belts. Local hour and seasonal variations are strongest for the inner-zone events, which occur preferentially just after local dawn and during the northern summer months.
RP Feldman, WC (reprint author), LOS ALAMOS NATL LAB,MS-D466,GRP NIS-1,LOS ALAMOS,NM 87545, USA.
NR 26
TC 1
Z9 1
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 MAR 1
PY 1996
VL 101
IS A3
BP 5211
EP 5217
DI 10.1029/95JA03394
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA TY349
UT WOS:A1996TY34900038
ER
PT J
AU Dohrmann, CR
Eisler, GR
Robinett, RD
AF Dohrmann, CR
Eisler, GR
Robinett, RD
TI Dynamic programming approach for burnout-to-apogee guidance of precision
munitions
SO JOURNAL OF GUIDANCE CONTROL AND DYNAMICS
LA English
DT Article
AB A method is presented for burnout-to-apogee munitions guidance that compensates for launch offsets from a nominal, ground-to-ground trajectory The munition is assumed to be configured for low-cost, externally received navigation updates that are only available up to the time of apogee. Using a novel technique, a guidance problem with an unspecified final time is transformed to a form solvable by the method of dynamic programming. A set of feedback gains is generated for times between motor burnout and apogee to compensate for launch-induced offsets. Corrected ballistic trajectories from apogee are obtained by including a quadratic term of target miss distance in the problem formulation. A single set of gains is shown to be robust for a range of launch offsets.
RP Dohrmann, CR (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 11
TC 1
Z9 3
U1 1
U2 3
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091
SN 0731-5090
J9 J GUID CONTROL DYNAM
JI J. Guid. Control Dyn.
PD MAR-APR
PY 1996
VL 19
IS 2
BP 340
EP 346
DI 10.2514/3.21624
PG 7
WC Engineering, Aerospace; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA UA391
UT WOS:A1996UA39100012
ER
PT J
AU Valentine, NB
Bolton, H
Kingsley, MT
Drake, GR
Balkwill, DL
Plymale, AE
AF Valentine, NB
Bolton, H
Kingsley, MT
Drake, GR
Balkwill, DL
Plymale, AE
TI Biosorption of cadmium, cobalt, nickel, and strontium by a Bacillus
simplex strain isolated from the vadose zone
SO JOURNAL OF INDUSTRIAL MICROBIOLOGY
LA English
DT Article
DE biosorption; subsurface bacterium; vadose; cadmium; cobalt; nickel;
strontium
ID ESCHERICHIA-COLI; CELL-WALLS; HEAVY-METALS; BACTERIA; SUBTILIS; BINDING;
SITES; MICROCOCCUS; SORPTION; ION
AB A subsurface Gram-positive, endospore-forming, filamentous bacterium, designated ZAN-044, was isolated from a depth of 96.2 m in the vadose zone of the Hanford Site in Washington State, A phylogenetic analysis of the 16S rRNA gene sequence of strain ZAN-044 revealed it to be 99.5% similar to Bacillus simplex strain DSM 1321, indicating that they may be members of the same species. B. simplex ZAN-044 was studied along with Bacillus subtilis 168, and Escherichia coli K-12 (AB264), two well-characterized metal-sorbing bacteria, for the binding of Cd2+, Co2+, Ni2+, and Sr2+. There was rapid (less than 1 h) uptake of 1 mu M metal by the three bacteria in the order Cd > Ni greater than or equal to Co > Sr, Binding followed a saturation isotherm at cation concentrations from 0.1 mu M to 1 mM, Cation binding was pH-dependent, with less binding at low pH. B. simplex ZAN-044 bound more metal than B. subtilis or E. coli, demonstrating that subsurface microorganisms can remove significant quantities of metals from solution and may be able to influence radionuclide and metal transport in the subsurface.
C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA.
FLORIDA STATE UNIV, TALLAHASSEE, FL 32306 USA.
RI Bolton, Harvey/E-5583-2011
NR 37
TC 30
Z9 31
U1 0
U2 10
PU STOCKTON PRESS
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE RG21 6XS, HAMPSHIRE, ENGLAND
SN 0169-4146
J9 J IND MICROBIOL
JI J. Indust. Microbiol.
PD MAR
PY 1996
VL 16
IS 3
BP 189
EP 196
DI 10.1007/BF01570003
PG 8
WC Biotechnology & Applied Microbiology
SC Biotechnology & Applied Microbiology
GA UG286
UT WOS:A1996UG28600007
ER
PT J
AU Martinez, DR
Hinnerichs, TD
Redmond, JM
AF Martinez, DR
Hinnerichs, TD
Redmond, JM
TI Vibration control for precision manufacturing using piezoelectric using
piezoelectric actuators
SO JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
LA English
DT Article; Proceedings Paper
CT ICAST 95
CY NOV 13-15, 1995
CL KEY WEST, FL
ID COMPOSITE PLATES; EMBEDDED ACTUATORS; SHAPE CONTROL; CHATTER;
SIMULATION; SHELLS
AB Piezoelectric actuators provide high frequency, force and stiffness capabilities along with reasonable stroke limits, all of which can be used to increase performance levels in precision manufacturing systems. This paper describes two examples of embedding piezoelectric actuators in structural components for vibration control, One example involves suppressing the self-excited chatter phenomenon in the metal cutting process of a milling machine and the other involves damping vibrations induced by rigid body stepping of a photolithography platen. Finite element modeling and analyses are essential far locating and sizing the actuators and permit further simulation studies of the response of the dynamic system, Experimental results are given for embedding piezoelectric actuators in a cantilevered bar configuration, which was used as a surrogate machine tool structure. These results are incorporated into a previously developed milling process simulation and the effect of the control on the cutting process stability diagram is quantified. Experimental results are also given for embedding three pietoelectric actuators in a surrogate photolithography platen to suppress vibrations. These results demonstrate the potential benefit that can be realized by applying advances from the field of adaptive structures to problems In precision manufacturing.
RP Martinez, DR (reprint author), SANDIA NATL LABS,STRUCT DYNAM & VIBRAT CONTROL DEPT,POB 5800,MSO439,ALBUQUERQUE,NM 87185, USA.
NR 22
TC 11
Z9 11
U1 2
U2 7
PU TECHNOMIC PUBL CO INC
PI LANCASTER
PA 851 NEW HOLLAND AVE, BOX 3535, LANCASTER, PA 17604
SN 1045-389X
J9 J INTEL MAT SYST STR
JI J. Intell. Mater. Syst. Struct.
PD MAR
PY 1996
VL 7
IS 2
BP 182
EP 191
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA UX562
UT WOS:A1996UX56200010
ER
PT J
AU Zabner, J
Friedman, E
Zeiher, BG
Freimuth, P
Welsh, MJ
AF Zabner, J
Friedman, E
Zeiher, BG
Freimuth, P
Welsh, MJ
TI Adenovirus-mediated gene transfer of CFTR to the ciliated airway
epithelia in vitro and in vivo.
SO JOURNAL OF INVESTIGATIVE MEDICINE
LA English
DT Meeting Abstract
C1 UNIV IOWA,DEPT INTERNAL MED,HOWARD HUGHES MED INST,IOWA CITY,IA 52242.
BROOKHAVEN NATL LAB,UPTON,NY 11973.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU SLACK INC
PI THOROFARE
PA 6900 GROVE RD, THOROFARE, NJ 08086
SN 1081-5589
J9 J INVEST MED
JI J. Invest. Med.
PD MAR
PY 1996
VL 44
IS 3
BP A281
EP A281
PG 1
WC Medicine, General & Internal; Medicine, Research & Experimental
SC General & Internal Medicine; Research & Experimental Medicine
GA UG207
UT WOS:A1996UG20700488
ER
PT J
AU Lodwig, SN
Unkefer, CJ
AF Lodwig, SN
Unkefer, CJ
TI Stereoselective synthesis of stable isotope-labeled L-alpha-amino acids:
Electrophilic amination of Oppolzer's acyl sultams in the synthesis of
L-[N-15]alanine, L-[N-15]valine, L-[N-15]leucine, L-[N-15]phenylalanine
and L-[1-C-13,N-15]valine.
SO JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS
LA English
DT Article
DE 1-chloro-1-[N-15]nitrosocyclohexane; L-[N-15]alanine; L-[N-15]valine;
L-[N-15]leucine; L-[N-15]phenylalanine; L-[1-C-13,N-15]valine;
bornane-10,2-sultam; camphor-l0-2-sultam
ID N-HYDROXYAMINO ACIDS; ASYMMETRIC-SYNTHESIS; CHEMOMICROBIOLOGICAL
SYNTHESIS; 1-CHLORO-1-NITROSOCYCLOHEXANE; EQUIVALENT
AB Using 1-chloro-1-[N-15]nitrosocyclohexane, we have prepared five L-[alpha-N-15]amino acids. The stereoselective electophillic hydroxyamination of (S)-acylbornane-10,2-sultams, followed by Zn-o/H+ reduction, and alkaline cleavage of the chiral auxiliary, gave the amino acids in 97.2-99.5% e.e. By starting with labeled (S)-acylbornane-10,2-sultams this stereoselective route could be to prepare many C-13 and/or N-15 isotopomers of alpha-amino acids.
C1 LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
CENTRALIA COLL,DIV SCI,CENTRALIA,WA 98531.
NR 16
TC 4
Z9 4
U1 0
U2 3
PU JOHN WILEY & SONS LTD
PI W SUSSEX
PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD
SN 0362-4803
J9 J LABELLED COMPD RAD
JI J. Label. Compd. Radiopharm.
PD MAR
PY 1996
VL 38
IS 3
BP 239
EP 248
DI 10.1002/(SICI)1099-1344(199603)38:3<239::AID-JLCR831>3.0.CO;2-E
PG 10
WC Biochemical Research Methods; Chemistry, Medicinal; Chemistry,
Analytical
SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Chemistry
GA TY035
UT WOS:A1996TY03500004
ER
PT J
AU Oppenheimer, J
Silks, LA
AF Oppenheimer, J
Silks, LA
TI Synthesis of 2-Phenyl-1,2-benziso[Se-77]selenazol-3(2H)-one: ''Ebselen''
SO JOURNAL OF LABELLED COMPOUNDS & RADIOPHARMACEUTICALS
LA English
DT Article
DE 2-phenyl-1,2-benziso[Se-77]selenazol-3(2H)-one; [Se-77]Ebselen;
(77)Selenium
ID GLUTATHIONE; SPECTROSCOPY; COMPOUND
AB Synthesis of 2-Phenyl-1,2-benziso[Se-77] selenazol-3(2H)-one has been accomplished in one step from 94% Se-77 and commercially available starting materials in 76% yield based on the enriched elemental selenium.
C1 LOS ALAMOS NATL LAB,NIH STABLE ISOTOPES RESOURCE,BIOSCI & BIOTECHNOL GRP,LOS ALAMOS,NM 87545.
NR 18
TC 5
Z9 5
U1 0
U2 0
PU JOHN WILEY & SONS LTD
PI W SUSSEX
PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD
SN 0362-4803
J9 J LABELLED COMPD RAD
JI J. Label. Compd. Radiopharm.
PD MAR
PY 1996
VL 38
IS 3
BP 281
EP 284
DI 10.1002/(SICI)1099-1344(199603)38:3<281::AID-JLCR833>3.0.CO;2-1
PG 4
WC Biochemical Research Methods; Chemistry, Medicinal; Chemistry,
Analytical
SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy; Chemistry
GA TY035
UT WOS:A1996TY03500009
ER
PT J
AU Parrell, JA
Feng, Y
Dorris, SE
Larbalestier, DC
AF Parrell, JA
Feng, Y
Dorris, SE
Larbalestier, DC
TI Controlled decomposition and reformation of the 2223 phase in Ag-clad
(Bi,Pb)(2)Sr2Ca2Cu3Ox tapes and its influence on the microstructure and
critical current density
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID CU-O SYSTEM; TEMPERATURE; SUPERCONDUCTORS; STABILITY; MECHANISM; WIRES
AB The decomposition of almost fully reacted (Bi,Pb)(2)Sr2Ca2Cu3Ox (BSCCO-2223) tapes caused by heating in 1 atm of pure O-2 at 825 degrees C has been studied. It was found that partially decomposing 2223 tapes to a mixture of Bi2Sr2Ca1Cu2Oy, (Ca,Sr)(2)PbO4, and other secondary phases reduced the critical current density (77 K, 0 T) from similar to 20 kA/cm(2) to nearly zero. Reheating the tapes in 7.5% O-2 restored the 2223 phase and, while there was some degradation of the 2223 grain alignment due to residual secondary phase growth, the critical current density was also restored to nearly its original value, We hypothesize that such a decomposition/reformation process can be useful in increasing the connectivity and relative density of polycrystalline 2223, by encouraging the formation of a liquid phase which heals residual cracks in the BSCCO core.
C1 UNIV WISCONSIN,MAT SCI PROGRAM,MADISON,WI 53706.
ARGONNE NATL LAB,DIV ENERGY TECHNOL,ARGONNE,IL 60439.
RP Parrell, JA (reprint author), UNIV WISCONSIN,CTR APPL SUPERCONDUCT,1500 ENGN DR,MADISON,WI 53706, USA.
RI Larbalestier, David/B-2277-2008
OI Larbalestier, David/0000-0001-7098-7208
NR 39
TC 15
Z9 15
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 MAR
PY 1996
VL 11
IS 3
BP 555
EP 564
DI 10.1557/JMR.1996.0068
PG 10
WC Materials Science, Multidisciplinary
SC Materials Science
GA TY914
UT WOS:A1996TY91400003
ER
PT J
AU Wolfenstine, J
Armstrong, TR
Weber, WJ
BolingRisser, MA
Goretta, KC
Routbort, JL
AF Wolfenstine, J
Armstrong, TR
Weber, WJ
BolingRisser, MA
Goretta, KC
Routbort, JL
TI Elevated temperature deformation of fine-grained La0.9Sr0.1MnO3
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
ID OXIDATION-REDUCTION BEHAVIOR; SR-DOPED LAMNO3; ELECTRICAL-CONDUCTIVITY;
DEFECT STRUCTURE; LOWER MANTLE; FUEL-CELLS; CREEP; PEROVSKITE;
VISCOSITY; CERAMICS
AB Compressive creep behavior of fine-grained (5 mu m) La0.9Sr0.1MnO3 with a relative theoretical density between 85 and 90% was investigated over the temperature range 1150-1300 degrees C in air. The fine grain size, brief creep transients, stress exponent close to unity, and absence of deformation-induced dislocations, suggested that the deformation was controlled by a diffusional creep mechanism. The activation energy for creep of La0.9Sr0.1MnO3 was 490 kJ/mole. A comparison of the activation energy for creep of La0.9Sr0.1MnO3 with existing diffusion and creep data for perovskite oxides suggested that the diffusional creep of La0.9Sr0.1MnO3 was controlled by lattice diffusion of the cations, either lanthanum or manganese.
C1 PACIFIC NW LAB, RICHLAND, WA 99352 USA.
ARGONNE NATL LAB, DIV ENERGY TECHNOL, ARGONNE, IL 60439 USA.
RP Wolfenstine, J (reprint author), UNIV CALIF IRVINE, DEPT CHEM & BIOCHEM ENGN, IRVINE, CA 92717 USA.
RI Weber, William/A-4177-2008
OI Weber, William/0000-0002-9017-7365
NR 53
TC 25
Z9 25
U1 0
U2 3
PU MATERIALS RESEARCH SOCIETY
PI PITTSBURGH
PA 9800 MC KNIGHT ROAD SUITE 327, PITTSBURGH, PA 15237
SN 0884-2914
J9 J MATER RES
JI J. Mater. Res.
PD MAR
PY 1996
VL 11
IS 3
BP 657
EP 662
DI 10.1557/JMR.1996.0079
PG 6
WC Materials Science, Multidisciplinary
SC Materials Science
GA TY914
UT WOS:A1996TY91400014
ER
PT J
AU Zeng, JSQ
Greif, R
Stevens, P
Ayers, M
Hunt, A
AF Zeng, JSQ
Greif, R
Stevens, P
Ayers, M
Hunt, A
TI Effective optical constants n and k and extinction coefficient of silica
aerogel
SO JOURNAL OF MATERIALS RESEARCH
LA English
DT Article
AB In this work the normal reflectance, R, at a planar silica aerogel interface and the normal transmittance, T, of a silica aerogel slab were measured using a Fourier Transform Infrared Spectrometer. Two procedures were used to obtain the effective optical constants, i.e., the refractive index n and the absorption index kappa, of silica aerogel. One procedure determined kappa from the measured transmittance T and then determined n from the results for kappa and from the measured reflectance R using the Kramers-Kronig relation; the other procedure determined n and kappa of silica aerogel from n and kappa of fully dense silica glass by using the Clausius-Mossotti equation, Maxwell Garnett formula, and Bruggeman formula. The first procedure has a relatively large error due to the inaccuracy of the transmission and reflection measurements. The second procedure, especially the Clausius-Mossotti equation, yields values of n that are consistent with experiments and may be used for the calculation of the effective optical constants and the extinction coefficient of silica aerogel.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
RP Zeng, JSQ (reprint author), UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720, USA.
NR 16
TC 25
Z9 27
U1 1
U2 11
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 MAR
PY 1996
VL 11
IS 3
BP 687
EP 693
DI 10.1557/JMR.1996.0083
PG 7
WC Materials Science, Multidisciplinary
SC Materials Science
GA TY914
UT WOS:A1996TY91400018
ER
PT J
AU Vaidya, RU
Zurek, AK
AF Vaidya, RU
Zurek, AK
TI Effect of the matrix ageing conditions on the low strain rate response
of a B4C particle reinforced 6061 aluminium matrix composite
SO JOURNAL OF MATERIALS SCIENCE LETTERS
LA English
DT Article
ID ALLOYS
RP Vaidya, RU (reprint author), LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545, USA.
NR 9
TC 5
Z9 5
U1 0
U2 0
PU CHAPMAN HALL LTD
PI LONDON
PA 2-6 BOUNDARY ROW, LONDON, ENGLAND SE1 8HN
SN 0261-8028
J9 J MATER SCI LETT
JI J. Mater. Sci. Lett.
PD MAR 1
PY 1996
VL 15
IS 5
BP 385
EP 387
PG 3
WC Materials Science, Multidisciplinary
SC Materials Science
GA UD919
UT WOS:A1996UD91900006
ER
PT J
AU Adler, RJ
Jacob, OC
AF Adler, RJ
Jacob, OC
TI Null surfaces, initial values, and evolution operators for spinor fields
SO JOURNAL OF MATHEMATICAL PHYSICS
LA English
DT Article
AB We analyze the initial value problem for spinor fields obeying the Dirac equation, with particular attention to the characteristic surfaces. The standard Cauchy initial value problem for first-order differential equations is to construct a solution function in a neighborhood of space and time from the values of the function on a selected initial value surface. On the characteristic surfaces the solution function may be discontinuous, so the standard Cauchy construction breaks down. For the Dirac equation the characteristic surfaces are null surfaces. An alternative version of the initial value problem may be formulated using null surfaces; the initial value data needed differs from that of the standard Cauchy problem. We study, in particular, the intersecting pair of characteristics t=x and t=-x (and supress the y and z dependence). In this case the values of separate components of the spinor function on the intersecting pair of null surfaces comprise the necessary initial value data. We present an expression for the construction of a solution from the null surface data; two analogs of the quantum mechanical Hamiltonian operator determine the evolution of the system. (C) 1996 American Institute of Physics.
C1 STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309.
SONOMA STATE UNIV,DEPT PHYS & ASTRON,ROHNERT PK,CA 94928.
RP Adler, RJ (reprint author), SAN FRANCISCO STATE UNIV,DEPT PHYS & ASTRON,SAN FRANCISCO,CA 94132, USA.
NR 12
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 0022-2488
J9 J MATH PHYS
JI J. Math. Phys.
PD MAR
PY 1996
VL 37
IS 3
BP 1091
EP 1099
DI 10.1063/1.531449
PG 9
WC Physics, Mathematical
SC Physics
GA TY354
UT WOS:A1996TY35400001
ER
PT J
AU Spevak, W
Foxall, C
Charych, DH
Dasgupta, F
Nagy, JO
AF Spevak, W
Foxall, C
Charych, DH
Dasgupta, F
Nagy, JO
TI Carbohydrates in an acidic multivalent assembly: Nanomolar P-selectin
inhibitors
SO JOURNAL OF MEDICINAL CHEMISTRY
LA English
DT Article
ID GMP-140 BINDS; RECEPTOR; ADHESION; LIGAND; OLIGOSACCHARIDE;
INFLAMMATION; NEUTROPHILS; RECOGNITION; PLATELETS; LIPOSOMES
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR ADV MAT,BERKELEY,CA 94720.
GLYCOMED INC,ALAMEDA,CA 94501.
NR 38
TC 84
Z9 85
U1 0
U2 6
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036
SN 0022-2623
J9 J MED CHEM
JI J. Med. Chem.
PD MAR 1
PY 1996
VL 39
IS 5
BP 1018
EP 1020
DI 10.1021/jm950914+
PG 3
WC Chemistry, Medicinal
SC Pharmacology & Pharmacy
GA TY544
UT WOS:A1996TY54400003
PM 8676335
ER
PT J
AU Sever, DM
Rania, LC
Krenz, JD
AF Sever, DM
Rania, LC
Krenz, JD
TI Reproduction of the salamander Siren intermedia Le Conte with special
reference to oviducal anatomy and mode of fertilization
SO JOURNAL OF MORPHOLOGY
LA English
DT Article
ID EURYCEA-CIRRIGERA; SPERM STORAGE; AMPHIBIA; PHYLOGENY; SPERMATHECAE;
EVOLUTION; CLOACAE; CAUDATA
AB Reproduction was studied in a South Carolina population of the paedomorphic salamander Siren intermedia with emphasis on anatomy of the female oviduct. The oviduct forms 67-79% of the snout-vent length in this elongate species and can be divided into three portions. The atrium, 7-13% of oviducal length, is the narrow anteriormost portion, with the ostial opening immediately caudad of the transverse septum. The ampulla, 63-75% of oviducal length, is the highly convoluted, middle portion in which gelatinous coverings are added to the eggs during their passage. Hypertrophy of the oviducal glands in the ampulla causes the ampulla to increase in diameter during the ovipository season. The secretion of the eosinophilic oviducal glands is intensely positive following staining with the periodic acid-Schiff procedure and does not react with alcian blue at pH 2.5. This staining reaction, coupled with the presence of abundant rough endoplasmic reticulum and Golgi complexes, indicates that the secretion contains a glycoprotein. The ovisac, 16-25% of oviducal length, is the most posterior portion of the oviduct and holds up to 10-11 eggs prior to oviposition. Oviducal glands similar to those in the ampulla are absent in the ovisac. Oviposition in female sirens occurs during February-April in this population, and male spermiation is concurrent, Entire oviducts were sectioned from three females collected during the ovipository season and from two collected prior to the breeding season, and sperm were not found in the oviducts of these specimens. Thus no evidence was found for internal fertilization or sperm storage in the oviducts of sirens. (C) 1996 Wiley-Liss, Inc.
C1 SAVANNAH RIVER ECOL LAB, AIKEN, SC 29802 USA.
UNIV GEORGIA, INST ECOL, ATHENS, GA 30602 USA.
RP Sever, DM (reprint author), ST MARYS COLL, DEPT BIOL, NOTRE DAME, IN 46556 USA.
NR 40
TC 23
Z9 25
U1 1
U2 1
PU WILEY-BLACKWELL
PI MALDEN
PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA
SN 0362-2525
J9 J MORPHOL
JI J. Morphol.
PD MAR
PY 1996
VL 227
IS 3
BP 335
EP 348
PG 14
WC Anatomy & Morphology
SC Anatomy & Morphology
GA TX471
UT WOS:A1996TX47100005
ER
PT J
AU Morimoto, Y
Weeks, RA
Barnes, AV
Tolk, NH
Zuhr, RA
AF Morimoto, Y
Weeks, RA
Barnes, AV
Tolk, NH
Zuhr, RA
TI The effect of ion implantation on luminescence of a silica
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article; Proceedings Paper
CT 8th International Conference on the Physics of Non-Crystalline Solids
CY JUN 28-JUL 01, 1995
CL ABO AKAD UNIV, TURKU, FINLAND
SP Finnish Minist Educ, Acad Finland, Abo Akad Fdn
HO ABO AKAD UNIV
ID VITREOUS SILICA; SIO2; DEFECTS; QUARTZ
AB Luminescence spectra and intensities oi type I io type IV silicas. excited with a 1 keV electron beam, were measured, Luminescence was measured on type III silica samples implanted with hydrogen or helium ions in a dose range of 10(16)-10(17)/cm(2) with energies in the range of 35-160 keV. Under electron excitation, luminescence bands were observed at 2.75 eV in all samples and bands at 19 and 2.2 eV in some samples. The initial luminescent intensities at 2.75 eV were proportional io the beam current in the range of 0.8-12.7 mu A/mm(2) and inversely related to the SiOH contents in some silicas and H+ implanted silicas. A model is proposed that the transient change of the emission intensities is due to a competition reaction between luminescence center creation and a reaction that diminishes the intensities.
C1 VANDERBILT UNIV,DEPT APPL & ENGN SCI,NASHVILLE,TN 37235.
VANDERBILT UNIV,DEPT PHYS & ASTRON,NASHVILLE,TN 37235.
OAK RIDGE NATL LAB,OAK RIDGE,TN 37831.
NR 32
TC 16
Z9 16
U1 0
U2 5
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD MAR
PY 1996
VL 196
BP 106
EP 112
DI 10.1016/0022-3093(95)00559-5
PG 7
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA UM120
UT WOS:A1996UM12000018
ER
PT J
AU Marcus, M
Jacobson, D
Vredenberg, A
Lamble, G
AF Marcus, M
Jacobson, D
Vredenberg, A
Lamble, G
TI Concentration and annealing effects on photoluminescence and local
structure of Er-implanted silica
SO JOURNAL OF NON-CRYSTALLINE SOLIDS
LA English
DT Article
ID ABSORPTION FINE-STRUCTURE; SPONTANEOUS EMISSION; FIBER AMPLIFIER; WAVE
AB Extended X-ray absorption fine structure (EXAFS) and photoluminescence (PL) measurements were performed on Er-implanted silica as a function of concentration and annealing at 900 degrees C for 30 min. Er was implanted at 5 MeV to form peaked concentration profiles, as well as at a range of energies to form nearly-flat profiles over 1.5 mu m of depth, Peak concentrations ranged from 0.1 to 1.0 at.%. It is found that, for low (0.1 at.%) concentrations, local structure is unaffected by annealing, while the lifetime increases, It is suggested that the lifetime is determined by defects in the glass matrix. For higher concentrations, the Er-O distance increases from 2.1 Angstrom to 2.24 Angstrom, the latter value being close to that found in bulk glasses, As a function of Er concentration and annealing, certain PL features evolve in a manner correlated with the EXAFS distances and coordination numbers, The effect of annealing becomes more pronounced at higher Er concentrations. It is suggested that some of the same structural features affect both probes.
C1 UNIV UTRECHT,DEBYE INST,DEPT ATOM & INTERFACE PHYS,UTRECHT,NETHERLANDS.
BROOKHAVEN NATL LAB,NATL SYNCHROTRON LIGHT SOURCE,UPTON,NY 11973.
RP Marcus, M (reprint author), AT&T BELL LABS,600 MT AVE,MURRAY HILL,NJ 07974, USA.
RI Institute (DINS), Debye/G-7730-2014
NR 20
TC 8
Z9 8
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-3093
J9 J NON-CRYST SOLIDS
JI J. Non-Cryst. Solids
PD MAR
PY 1996
VL 195
IS 3
BP 232
EP 238
DI 10.1016/0022-3093(95)00535-8
PG 7
WC Materials Science, Ceramics; Materials Science, Multidisciplinary
SC Materials Science
GA UG944
UT WOS:A1996UG94400004
ER
PT J
AU Shekhar, S
AF Shekhar, S
TI Local characterization of invariant sets of an autonomous differential
inclusion - Boundary of unstable manifolds
SO JOURNAL OF NONLINEAR SCIENCE
LA English
DT Article
DE differential inclusions; unstable and stable manifolds; stability
boundaries; multivalued differential equations; control uncertainty;
fine-motion planning; robotics
AB An application in robotics motivates us to characterize the evolution of a subset in state space due to a compact neighborhood of an arbitrary dynamical system-an instance of a differential inclusion. Earlier results of Blagodat-skikh and Filippov (1986) and Butkovskii (1982) characterize the boundary of the attainable set and the forward projection operator of a state. Our first result is a local characterization of the boundary of the forward projection of a compact regular subset of the state space. Let the collection of states such that the differential inclusion contains an equilibrium point be called a singular invariant set. We show that the fields at the boundary of the forward projection of a singular invariant set are degenerate under some regularity assumptions when the state-wise boundary of the differential inclusion is smooth. Consider instead those differential inclusions such that the state-wise boundary of the problem is a regular convex polytope-a piecewise smooth boundary rather than smooth. Our second result gives conditions for the uniqueness and existence of the boundary of the forward projection of a singular invariant set. They characterize the bundle of unstable and stable manifolds of such a differential inclusion.
RP OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA.
NR 23
TC 0
Z9 0
U1 2
U2 3
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0938-8974
EI 1432-1467
J9 J NONLINEAR SCI
JI J. Nonlinear Sci.
PD MAR-APR
PY 1996
VL 6
IS 2
BP 105
EP 138
PG 34
WC Mathematics, Applied; Mechanics; Physics, Mathematical
SC Mathematics; Mechanics; Physics
GA UD661
UT WOS:A1996UD66100001
ER
PT J
AU Stabin, MG
AF Stabin, MG
TI MIRDOSE: Personal computer software for internal dose assessment in
nuclear medicine
SO JOURNAL OF NUCLEAR MEDICINE
LA English
DT Article
DE internal dosimetry; computers
RP Stabin, MG (reprint author), OAK RIDGE SCI & EDUC,RADIAT INTERNAL DOSE INFORMAT CTR,POB 117,OAK RIDGE,TN 37831, USA.
FU PHS HHS [224-75-3016]
NR 25
TC 556
Z9 566
U1 0
U2 1
PU SOC NUCLEAR MEDICINE INC
PI RESTON
PA 1850 SAMUEL MORSE DR, RESTON, VA 22090-5316
SN 0161-5505
J9 J NUCL MED
JI J. Nucl. Med.
PD MAR
PY 1996
VL 37
IS 3
BP 538
EP 546
PG 9
WC Radiology, Nuclear Medicine & Medical Imaging
SC Radiology, Nuclear Medicine & Medical Imaging
GA TZ413
UT WOS:A1996TZ41300038
PM 8772664
ER
PT J
AU Kukita, Y
Yonomoto, T
Asaka, H
Nakamura, H
Kumamaru, H
Anoda, Y
Boucher, TJ
Ortiz, MG
Shaw, RA
Schultz, RR
AF Kukita, Y
Yonomoto, T
Asaka, H
Nakamura, H
Kumamaru, H
Anoda, Y
Boucher, TJ
Ortiz, MG
Shaw, RA
Schultz, RR
TI ROSA/AP600 testing: Facility modifications and initial test results
SO JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY
LA English
DT Article
DE PWR type reactors; passive safety; Westinghouse AP600; loss of coolant;
emergency core cooling; decay heat removal; integral experiments; ROSA;
LSTF
AB The Japan Atomic Energy Research Institute (JAERI) and the United States Nuclear Regulatory Commission (USNRC) are jointly conducting confirmatory, integral testing on the Westinghouse AP600 reactor transient responses by using the ROSA-V Large Scale Test Facility of JAERI. This facility, built originally to simulate conventional 4-loop pressurized water reactors (PWRs), has been modified by adding components specific to the AP600 design. The modified LSTF now provides a full-pressure, full-height, 1/30.5 volumetrically-scaled simulation of AP600. Five loss-of-coolant accident (LOCA) experiments were performed by August 1994, simulating transients initiated by cold leg breaks, a Pressure Balance Line (PBL) break, and inadvertently open Automatic Depressurization System (ADS) valves. These experiments indicated adequate core cooling and decay heat removal performance of the AP600 passive safety components.
C1 EG&G IDAHO INC, IDAHO NATL ENGN LAB, IDAHO FALLS, ID USA.
RP JAPAN ATOM ENERGY RES INST, TOKAI, IBARAKI 31911, JAPAN.
NR 11
TC 14
Z9 16
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 MAR
PY 1996
VL 33
IS 3
BP 259
EP 265
DI 10.1080/18811248.1996.9731898
PG 7
WC Nuclear Science & Technology
SC Nuclear Science & Technology
GA UW217
UT WOS:A1996UW21700009
ER
PT J
AU Bastrukov, SI
Molodtsova, IV
Papoyan, VV
Weber, F
AF Bastrukov, SI
Molodtsova, IV
Papoyan, VV
Weber, F
TI Non-radial vibrations of neutron stars
SO JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
LA English
DT Letter
AB Non-radial oscillations of a non-rotating neutron star are studied. A neutron star is modelled by a spherically symmetric distribution of nuclear matter possessing the properties of an elastic solid bounded by Newtonian gravity. The analytic formalism describing the spheroidal gravitation-elastic vibrations is developed. Emphasis is placed on calculation of the eigenfrequencies of non-radial vibrations. First numerical estimates are presented and compared with those obtained in earlier calculations on the basis of Kelvin's hydrodynamic model.
C1 JOINT INST NUCL RES,BOGOLIUBOV LAB THEORET PHYS,DUBNA 141980,RUSSIA.
YEREVAN STATE UNIV,DEPT THEORET PHYS,YEREVAN 375049,ARMENIA.
UNIV MUNICH,INST THEORET PHYS,D-80333 MUNICH,GERMANY.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV NUCL SCI,BERKELEY,CA 94720.
RP Bastrukov, SI (reprint author), JOINT INST NUCL RES,LCTA,COMP PHYS DIV,DUBNA 141980,RUSSIA.
NR 18
TC 4
Z9 4
U1 0
U2 0
PU IOP PUBLISHING LTD
PI BRISTOL
PA TECHNO HOUSE, REDCLIFFE WAY, BRISTOL, ENGLAND BS1 6NX
SN 0954-3899
J9 J PHYS G NUCL PARTIC
JI J. Phys. G-Nucl. Part. Phys.
PD MAR
PY 1996
VL 22
IS 3
BP L33
EP L38
DI 10.1088/0954-3899/22/3/002
PG 6
WC Physics, Nuclear; Physics, Particles & Fields
SC Physics
GA UA492
UT WOS:A1996UA49200002
ER
PT J
AU Tilley, DL
Choueiri, EY
Kelly, AJ
Jahn, RG
AF Tilley, DL
Choueiri, EY
Kelly, AJ
Jahn, RG
TI Microinstabilities in a 10-kilowatt self-field magnetoplasmadynamic
thruster
SO JOURNAL OF PROPULSION AND POWER
LA English
DT Article
ID HYBRID-DRIFT INSTABILITY; PERPENDICULAR SHOCK; MAGNETIC-FIELD; DRIVEN
AB Theoretical studies indicate that a variety of microscopic and macroscopic plasma instabilities can significantly affect the performance of the magnetoplasmadynamic (MPD) thruster, yet experimental evidence for their existence is extremely limited, The objective of this research was to provide experimental evidence for the existence of microinstabilities in a 10-kW-class, self-field MPD thruster. The lower-bound of the range of thruster operating currents investigated in this study was set by the requirement that the electromagnetic thrust component be much greater than the electrothermal thrust component, The upper-bound of the operating current was set by the initial observation of high-frequency thruster voltage oscillations, which is usually associated with the onset of excessive thruster erosion, Experimental evidence for two microinstabilities was obtained in the near-field plume of the thruster: 1) the generalized lower hybrid drift instability and 2) the electron cyclotron drift instability.
C1 PRINCETON UNIV,ELECT PROPULS & PLASMA DYNAM LAB,DEPT AERONAUT & MECH ENGN,PRINCETON,NJ 08544.
NR 65
TC 12
Z9 12
U1 0
U2 4
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 MAR-APR
PY 1996
VL 12
IS 2
BP 381
EP 389
DI 10.2514/3.24040
PG 9
WC Engineering, Aerospace
SC Engineering
GA UB282
UT WOS:A1996UB28200025
ER
PT J
AU Seaborg, GT
AF Seaborg, GT
TI Modification and expansion of Mendeleev's periodic table
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES
LA English
DT Article
RP Seaborg, GT (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720, USA.
NR 7
TC 1
Z9 1
U1 1
U2 2
PU AKADEMIAI KIADO
PI BUDAPEST
PA PO BOX 245, H-1519 BUDAPEST, HUNGARY
SN 0236-5731
J9 J RADIOAN NUCL CH AR
JI J. Radioanal. Nucl. Chem.-Artic.
PD MAR
PY 1996
VL 203
IS 2
BP 233
EP 245
DI 10.1007/BF02041508
PG 13
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
Technology
SC Chemistry; Nuclear Science & Technology
GA UM201
UT WOS:A1996UM20100002
ER
PT J
AU Peterson, JR
Xu, W
AF Peterson, JR
Xu, W
TI Stabilization of divalent californium in crystalline strontium
tetraborate
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES
LA English
DT Article
AB The divalent oxidation state of californium (Cf) has been stabilized in crystalline SrB4O7. The ability to generate this less-stable oxidation state in an oxide matrix is significant. Factors promoting this stabilization have been determined. Access to this divalent state and those of many other lanthanide and actinide elements via a rather straightforward laboratory procedure now facilitates their study and characterization.
C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,TRANSURANIUM RES LAB,OAK RIDGE,TN 37831.
RP Peterson, JR (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA.
NR 15
TC 5
Z9 5
U1 1
U2 3
PU AKADEMIAI KIADO
PI BUDAPEST
PA PO BOX 245, H-1519 BUDAPEST, HUNGARY
SN 0236-5731
J9 J RADIOAN NUCL CH AR
JI J. Radioanal. Nucl. Chem.-Artic.
PD MAR
PY 1996
VL 203
IS 2
BP 301
EP 307
DI 10.1007/BF02041513
PG 7
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
Technology
SC Chemistry; Nuclear Science & Technology
GA UM201
UT WOS:A1996UM20100007
ER
PT J
AU Mirzadeh, S
Knapp, FF
AF Mirzadeh, S
Knapp, FF
TI Biomedical radioisotope generator systems
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES
LA English
DT Review
ID POSITRON EMISSION TOMOGRAPHY; ZINC-62 COPPER-62 GENERATOR; RADIONUCLIDE
GENERATOR; EMITTING RADIONUCLIDES; MYOCARDIAL PERFUSION;
MONOCLONAL-ANTIBODY; CYCLOTRON ISOTOPES; REACTOR PRODUCTION; PARENT
COMPLEX; RADIOPHARMACEUTICALS
AB Although the Mo-99-->Tc-99m radionuclide generator system has evolved as the workhorse of nuclear medicine over the past three decades, recent developments in radionuclide generator technology have provided positron emitters for PET studies, radionuclides for therapy, and ultra short-lived radionuclides for repeated clinical applications. Attention is being paid to development of in vivo generator systems and potential use of tandem generator systems. Separation of radionuclides in a generator system exploits differences in chemical properties of the parent-daughter pair; information is presented for these generator types based on the three chemical categories of chromatography, extraction, and volatilization and sublimation methods. This review focuses on chromatography-based systems.
RP Mirzadeh, S (reprint author), OAK RIDGE NATL LAB, NUCL MED GRP, OAK RIDGE, TN 37830 USA.
NR 128
TC 22
Z9 22
U1 1
U2 11
PU AKADEMIAI KIADO RT
PI BUDAPEST
PA PRIELLE K U 19, PO BOX 245,, H-1117 BUDAPEST, HUNGARY
SN 0236-5731
J9 J RADIOAN NUCL CH AR
JI J. Radioanal. Nucl. Chem.-Artic.
PD MAR
PY 1996
VL 203
IS 2
BP 471
EP 488
DI 10.1007/BF02041524
PG 18
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
Technology
SC Chemistry; Nuclear Science & Technology
GA UM201
UT WOS:A1996UM20100018
ER
PT J
AU Ceo, RN
Bicha, WJ
Gibson, JS
AF Ceo, RN
Bicha, WJ
Gibson, JS
TI Analytical measurements in support of Project Sapphire
SO JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES
LA English
DT Article
AB Highly enriched uranium has been purchased from Kazakhstan by the United States of America. The uranium as purchased existed in several chemical forms. In order to confirm the inventory, ensure criticality safety, and comply with international shipping regulations, the materials were characterized on-site for uranium and hydrogen contents using transportable instrumentation before shipment from Kazakhstan to the United States. Field measurement techniques included gamma ray ''enrichment meter'', passive neutron counts, density determination, and thermogravimetric hydrogen analysis. Details of the analyses are presented in this paper, as well as discussions of experimental results, their application, and inherent uncertainties.
RP Ceo, RN (reprint author), MARTIN MARIETTA ENERGY SYST INC,OAK RIDGE PLANT Y12,OAK RIDGE,TN 37831, USA.
NR 4
TC 1
Z9 1
U1 0
U2 1
PU AKADEMIAI KIADO
PI BUDAPEST
PA PO BOX 245, H-1519 BUDAPEST, HUNGARY
SN 0236-5731
J9 J RADIOAN NUCL CH AR
JI J. Radioanal. Nucl. Chem.-Artic.
PD MAR
PY 1996
VL 203
IS 2
BP 537
EP 546
DI 10.1007/BF02041528
PG 10
WC Chemistry, Analytical; Chemistry, Inorganic & Nuclear; Nuclear Science &
Technology
SC Chemistry; Nuclear Science & Technology
GA UM201
UT WOS:A1996UM20100022
ER
PT J
AU Macdonald, MJ
Muller, SJ
AF Macdonald, MJ
Muller, SJ
TI Experimental study of shear-induced migration of polymers in dilute
solutions
SO JOURNAL OF RHEOLOGY
LA English
DT Article
ID NONHOMOGENEOUS FLOW-FIELDS; VELOCITY-GRADIENT FIELDS; MACROMOLECULES;
MODEL; FLUCTUATIONS; TRANSITION; RHEOLOGY; FLUIDS
AB The results of an experimental study into the coupling of mass and momentum transfer for dilute polymer solutions are presented to test the numerous theoretical investigations of this effect. Solutions of high molecular weight, nearly monodisperse, linear polystyrene in oligomeric polystyrene were sheared in the cone-and-plate geometry. After long times under shear, the concentration of the high molecular weight species was measured as a function of radial position using a gel permeation chromatography based technique. An increase in polymer concentration of over 200% near the apex of the cone and a depletion of polymer near the edge was measured indicating a migration of polymer as a result of shearing the sample. The time evolution of the nonuniform concentration profile was found to be very slow and a strong function of both the polymer molecular weight and the applied shear rate. The experimental results are compared to theoretical predictions of a dumbbell based model and measured values of the physical parameters. While the method of solution of the highly coupled problem invokes a number of simplifying assumptions, the comparison to experimental results suggests that the theory substantially underestimates the rate of migration. (C) 1996 Society of Rheology.
C1 UNIV CALIF BERKELEY, DEPT CHEM ENGN, BERKELEY, CA 94720 USA.
UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, CTR ADV MAT, BERKELEY, CA 94720 USA.
NR 48
TC 47
Z9 47
U1 0
U2 13
PU JOURNAL RHEOLOGY AMER INST PHYSICS
PI MELVILLE
PA STE 1 NO 1, 2 HUNTINGTON QUADRANGLE, MELVILLE, NY 11747-4502 USA
SN 0148-6055
J9 J RHEOL
JI J. Rheol.
PD MAR-APR
PY 1996
VL 40
IS 2
BP 259
EP 283
DI 10.1122/1.550740
PG 25
WC Mechanics
SC Mechanics
GA TY907
UT WOS:A1996TY90700004
ER
PT J
AU Wang, B
Chakoumakos, BC
Sales, BC
Bates, JB
AF Wang, B
Chakoumakos, BC
Sales, BC
Bates, JB
TI Synthesis, crystal structure, electrical, magnetic, and electrochemical
lithium intercalation properties of vanadium oxynitrides
SO JOURNAL OF SOLID STATE CHEMISTRY
LA English
DT Article
AB Polycrystalline vanadium oxynitrides have been prepared by heat-treating V2O5 at high temperature in a flowing ammonia atmosphere. Single-phase cubic samples, with the rock salt structure, were produced by nitridation at 600-700 degrees C. Powder diffraction data from neutrons at two wavelengths and CuK alpha X-rays of these oxynitrides were analyzed using the Rietveld method, but strong correlation among the atomic displacement parameters, site occupancies, and the N/O ratio did not allow a refinement of unique compositions. Measured densities and cell volumes were used to limit the possible compositional space for each sample, and these were further limited by the charge neutrality requirement. The electrical resistivity of the single-phase sample is about 2 x 10(-3) Ohm . cm and is weakly temperature dependent below room temperature. Magnetic susceptibility measurements show no evidence of magnetic ordering and yield a magnetic moment of 0.25 mu(B) per V atom. Electrochemical lithium intercalation measurements indicate that only a small concentration of lithium ions were inserted into the cathode due to the close-packed NaCl structure of cubic vanadium oxynitride. (C) 1996 Academic Press, Inc.
RP Wang, B (reprint author), OAK RIDGE NATL LAB,DIV SOLID STATE,POB 2008,OAK RIDGE,TN 37831, USA.
RI Chakoumakos, Bryan/A-5601-2016
OI Chakoumakos, Bryan/0000-0002-7870-6543
NR 23
TC 14
Z9 14
U1 3
U2 14
PU ACADEMIC PRESS INC JNL-COMP SUBSCRIPTIONS
PI SAN DIEGO
PA 525 B ST, STE 1900, SAN DIEGO, CA 92101-4495
SN 0022-4596
J9 J SOLID STATE CHEM
JI J. Solid State Chem.
PD MAR
PY 1996
VL 122
IS 2
BP 376
EP 383
DI 10.1006/jssc.1996.0130
PG 8
WC Chemistry, Inorganic & Nuclear; Chemistry, Physical
SC Chemistry
GA UH149
UT WOS:A1996UH14900021
ER
PT J
AU Russick, EM
Poulter, GA
Adkins, CLJ
Sorensen, NR
AF Russick, EM
Poulter, GA
Adkins, CLJ
Sorensen, NR
TI Corrosive effects of supercritical carbon dioxide and cosolvents on
metals
SO JOURNAL OF SUPERCRITICAL FLUIDS
LA English
DT Article
DE supercritical; carbon dioxide; cosolvents; corrosion; metals
AB With the eventual phase-out of chlorofluorocarbons and hydrochlorofluorocarbons, and restrictive regulations concerning the use of other volatile organic compounds as cleaning solvents, it is essential to seek new, environmentally acceptable cleaning processes. We are investigating supercritical carbon dioxide (CO2) as an alternative solvent for precision cleaning of machined metal parts in governmental and industrial cleaning processes. The compatibility of metals in supercritical-fluid cleaning media with respect to corrosion must be addressed. In this work, a screening study of the corrosive effects of supercritical CO2 and several supercritical cosolvents on selected metals was conducted.
Sample coupons of stainless steel (grades 304LSS, 316SS), aluminum (grades 2024, 6061, 7075), carbon steel (1018), and copper (CDA 101) were statically exposed to pure supercritical CO2, water-saturated supercritical CO2, 10 wt % methanol/CO2 cosolvent, and 4 wt % tetrahydrofurfuryl alcohol (THFA)/CO2 at 24,138 kPa (3500 psig) and 323 K (50 degrees C) for 24 h. Gravimetric analysis and magnified visual inspection of the coupons were performed before and after the exposure tests. Surface analyses including electron microprobe analysis (EMPA), X-ray photoelectron spectroscopy (XPS), and Auger electron spectroscopy (AES) were done where visual and gravimetric changes were indicative of corrosive attack. The metal alloys were found to be compatible with the supercritical test media barring a few exceptions. Corrosive attack was observed on 1018 carbon steel in the water-saturated CO2 environment, and also on 2024 aluminum and CDA 101 copper, both in the 10 wt % methanol-CO2 cosolvent. The results of all compatibility testing are reported, and hypotheses are formed in an attempt to explain possible corrosion mechanisms.
RP Russick, EM (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 11
TC 41
Z9 42
U1 1
U2 22
PU PRA PRESS
PI CINCINNATI
PA POLYMER RES ASSOC INC 9200 MONTGOMERY RD, SUITE 23B, CINCINNATI, OH
45242
SN 0896-8446
J9 J SUPERCRIT FLUID
JI J. Supercrit. Fluids
PD MAR
PY 1996
VL 9
IS 1
BP 43
EP 50
DI 10.1016/S0896-8446(96)90043-1
PG 8
WC Chemistry, Physical; Engineering, Chemical
SC Chemistry; Engineering
GA UM132
UT WOS:A1996UM13200008
ER
PT J
AU Singh, D
Singh, JP
Wheeler, MJ
AF Singh, D
Singh, JP
Wheeler, MJ
TI Mechanical behavior of SiC(f)/SiC composites and correlation to in situ
fiber strength at room and elevated temperatures
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID CERAMIC-MATRIX COMPOSITES; SILICON-CARBIDE
AB Mechanical properties of Nicalon-fiber-reinforced silicon carbide matrix composites were evaluated, in flexure, at various temperatures ranging from ambient to 1300 degrees C. First matrix cracking stress ranged from 250 to 280 MPa and was relatively insensitive to test temperature, The measured ultimate strength showed a small increase from a room-temperature value of 370 to 460 MPa at 800 degrees C. Beyond 800 degrees C, however, strength dropped to as low as 280 MPa at 1300 degrees C. This decrease in ultimate strength at elevated temperatures is believed to be partly due to degradation of in situ Nicalon fiber strength, Scanning electron microscopy was employed to evaluate the in situ Nicalon fiber strengths via fracture mirror size measurements. Degradation of Nicalon fiber strength is attributed to thermal damage and to structural changes to the fiber at elevated temperatures, Measured values of ultimate strength of the composites were compared with predictions made on the basis of in situ fiber strength characteristics and an available analytical model.
RP Singh, D (reprint author), ARGONNE NATL LAB,DIV ENERGY TECHNOL,9700 S CASS AVE,ARGONNE,IL 60439, USA.
NR 25
TC 31
Z9 32
U1 0
U2 5
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 MAR
PY 1996
VL 79
IS 3
BP 591
EP 596
PG 6
WC Materials Science, Ceramics
SC Materials Science
GA UB624
UT WOS:A1996UB62400003
ER
PT J
AU Hasselman, DPH
Donaldson, KY
Thomas, JR
Brennan, JJ
AF Hasselman, DPH
Donaldson, KY
Thomas, JR
Brennan, JJ
TI Thermal conductivity of vapor liquid solid and vapor solid silicon
carbide whisker-reinforced lithium aluminosilicate glass ceramic
composites
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID NITRIDE MATRIX COMPOSITES; DIFFUSIVITY CONDUCTIVITY; RESISTANCE;
BARRIER; FIBERS; INTERFACES; CONTACT; SYSTEM; STICKS; SIZE
AB The thermal conductivities of two lithium aluminosilicate glass-ceramic matrix composites reinforced with 30 vol% of either SIC VS (rice hull) whiskers or SIC VLS (vapor-liquid-solid) whiskers were determined from room temperature to 500 degrees C. Because of the preferred alignment of the whiskers, the thermal conductivity values normal to the hot-pressing direction were found to be significantly higher than those in the parallel direction, The composites with the VLS whiskers exhibited higher thermal conductivity values than those with the VS whiskers, An analysis of the room-temperature data showed that the thermal conductivity values parallel to the hot-pressing direction were higher than those predicted from theory, even for whiskers with infinite thermal conductivity and perfect interfacial thermal contact. This effect was attributed to a significant contribution of percolation to the total heat flow as a result of direct whisker-to-whisker contact. For both types of whiskers, the interfacial thermal conductance and thermal conductivity values (at approximate to 6.5 x 10(5) W/(m(2) . K) and 200 W/(m . K), respectively) inferred from the composite thermal conductivity values perpendicular to the hot-pressing direction were essentially the same, It was concluded that the order of magnitude difference in thickness for the two whisker types was primarily responsible for the differences in thermal conductivity measured for these two composites.
C1 LOS ALAMOS NATL LAB,CERAM SCI & TECHNOL GRP,LOS ALAMOS,NM 87545.
UNITED TECHNOL RES CTR,E HARTFORD,CT 06108.
RP Hasselman, DPH (reprint author), VIRGINIA POLYTECH INST & STATE UNIV,DEPT MAT SCI & ENGN,THERMOPHYS RES LAB,BLACKSBURG,VA 24061, USA.
NR 44
TC 31
Z9 31
U1 2
U2 9
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 MAR
PY 1996
VL 79
IS 3
BP 742
EP 748
PG 7
WC Materials Science, Ceramics
SC Materials Science
GA UB624
UT WOS:A1996UB62400025
ER
PT J
AU Wang, CM
Pan, WQ
Hoffmann, MJ
Cannon, RM
Ruhle, M
AF Wang, CM
Pan, WQ
Hoffmann, MJ
Cannon, RM
Ruhle, M
TI Grain boundary films in rare-earth-glass-based silicon nitride
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID EQUILIBRIUM THICKNESS; MICROSTRUCTURE; CERAMICS; PHASES; SI3N4
AB The thickness of the intergranular films in Si3N4 densified with lanthanide oxides has been systematically investigated using high-resolution transmission electron microscopy. Four lanthanide oxides-La2O3, Nd2O3, Gd2O3, and Yb2O3-as well as Y2O3 are chosen so that the results will reflect the overall trend in the effect of the lanthanide utilized. The film thicknesses increase with increasing ionic radius of the lanthanide. In addition, Si3N4 particles flocculated into isolated clusters in the lanthanide-based glasses are also characteristically separated by an amorphous film whose thickness is similar to that in the comparable polycrystalline ceramics, demonstrating that the film thickness is dictated entirely by the composition and not by the amount of the glass phase present.
C1 UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA.
RP MAX PLANCK INST MET RES, INST WERKSTOFFWISSENSCH, D-70174 STUTTGART, GERMANY.
NR 26
TC 126
Z9 128
U1 1
U2 12
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
EI 1551-2916
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD MAR
PY 1996
VL 79
IS 3
BP 788
EP 792
PG 5
WC Materials Science, Ceramics
SC Materials Science
GA UB624
UT WOS:A1996UB62400034
ER
PT J
AU Unal, O
Akinc, M
AF Unal, O
Akinc, M
TI Compressive properties of yttrium oxide
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID FRACTURE-TOUGHNESS; STRESS STATES; CERAMICS; FAILURE; CRACKS; SOLIDS
AB Compressive properties of polycrystalline yttrium oxide (Y2O3) were studied by slow-strain-rate experiments (epsilon = 5.7 x 10(-6) s(-1)) between room temperature and 1600 degrees C. It was shown that Y2O3 fails in a brittle manner up to 1000 degrees C, and at 1200 degrees C and above plastic deformation becomes dominant. Plastic deformation of Y2O3 takes place exclusively by dislocation motion. Maximum stress, yield stress, and elastic modulus decrease with increasing temperature, although the decrease at temperatures above 1000 degrees C is much more pronounced.
C1 IOWA STATE UNIV SCI & TECHNOL,AMES LAB,DEPT MAT SCI & ENGN,AMES,IA 50011.
RP Unal, O (reprint author), IOWA STATE UNIV SCI & TECHNOL,AMES LAB,MET & CERAM PROGRAM,AMES,IA 50011, USA.
NR 14
TC 21
Z9 21
U1 0
U2 6
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 MAR
PY 1996
VL 79
IS 3
BP 805
EP 808
PG 4
WC Materials Science, Ceramics
SC Materials Science
GA UB624
UT WOS:A1996UB62400038
ER
PT J
AU Tompson, S
AF Tompson, S
TI Managing Internet information services - Liu,C, Peek,J, Jones,R, Buus,B,
Nye,A
SO JOURNAL OF THE AMERICAN SOCIETY FOR INFORMATION SCIENCE
LA English
DT Book Review
RP Tompson, S (reprint author), FERMILAB NATL ACCELERATOR LAB,LIB MS109,POB 500,BATAVIA,IL 60510, USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU JOHN WILEY & SONS INC
PI NEW YORK
PA 605 THIRD AVE, NEW YORK, NY 10158-0012
SN 0002-8231
J9 J AM SOC INFORM SCI
JI J. Am. Soc. Inf. Sci.
PD MAR
PY 1996
VL 47
IS 3
BP 254
EP 255
PG 2
WC Computer Science, Information Systems; Information Science & Library
Science
SC Computer Science; Information Science & Library Science
GA TX290
UT WOS:A1996TX29000015
ER
PT J
AU Bhattacharya, RN
Fernandez, AM
Contreras, MA
Keane, J
Tennant, AL
Ramanathan, K
Tuttle, JR
Noufi, RN
Hermann, AM
AF Bhattacharya, RN
Fernandez, AM
Contreras, MA
Keane, J
Tennant, AL
Ramanathan, K
Tuttle, JR
Noufi, RN
Hermann, AM
TI Electrodeposition of In-Se, Cu-Se, and Cu-In-Se thin films
SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY
LA English
DT Article
ID CUINSE2
AB Indium-selenium, copper-selenium, and copper-indium-selenium thin films have been prepared by electrodeposition techniques on molybdenum substrates. Electrodeposited precursors are prepared at varying potentials, pH, and deposition times. The adhesion and uniformity of indium selenide on molybdenum substrates are improved by electrodepositing an initial copper layer (500 Angstrom) on molybdenum. The films (In-Se, Cu-Se, and Cu-In-Se) are annealed at 250 and 450 degrees C in Ar for 15 min and are slow-cooled (3 degrees C/min). The films are characterized by electron microprobe analysis, inductive-coupled plasma spectrometry, x-ray diffraction analysis, Auger electron spectroscopy, and scanning electron microscopy. The as-deposited precursor films are loaded in a physical evaporation chamber and additional In or Cu and Se are added to the film to adjust the final composition to CuInSe2. The device fabricated using electrodeposited Cu-In-Se precursor layers resulted in a solar cell efficiency of 9.4%.
C1 UNIV NACL AUTONOMA MEXICO,IIM,LAB ENERGIA SOLAR,TEMIXCO 62580,MORELOS,MEXICO.
UNIV COLORADO,DEPT PHYS,BOULDER,CO 80301.
RP Bhattacharya, RN (reprint author), NATL RENEWABLE ENERGY LAB,GOLDEN,CO 80401, USA.
NR 19
TC 48
Z9 53
U1 0
U2 6
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 MAR
PY 1996
VL 143
IS 3
BP 854
EP 858
DI 10.1149/1.1836548
PG 5
WC Electrochemistry; Materials Science, Coatings & Films
SC Electrochemistry; Materials Science
GA UC203
UT WOS:A1996UC20300021
ER
PT J
AU Zheng, JP
Jow, TR
Jia, QX
Wu, XD
AF Zheng, JP
Jow, TR
Jia, QX
Wu, XD
TI Proton insertion into ruthenium oxide film prepared by pulsed laser
deposition
SO JOURNAL OF THE ELECTROCHEMICAL SOCIETY
LA English
DT Article
ID ELECTRODES
AB Electrochemical properties of ruthenium oxide (RuO2) films with different degrees of crystallinity were studied. The RuO2 films were grown by pulsed laser deposition at substrate temperatures from 30 to 400 degrees C. At low temperatures, the amorphous phase of RuO2 films was formed. At high temperatures, the crystalline phase of RuO2 films was obtained. From the cyclic voltammetric study in H2SO4 solution, it was found that the current response for an electrode of the amorphous RuO2 film was higher than that of the crystalline film. A proton diffusion length of larger than 5.8 nm was obtained on the RuO2 film prepared at 30 degrees C.
C1 LOS ALAMOS NATL LAB,SUPERCOND TECHNOL CTR,LOS ALAMOS,NM 87545.
RP Zheng, JP (reprint author), USA,RES LAB,PHYS SCI DIRECTORATE,FT MONMOUTH,NJ 07703, USA.
RI Jia, Q. X./C-5194-2008
NR 13
TC 23
Z9 27
U1 4
U2 11
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 MAR
PY 1996
VL 143
IS 3
BP 1068
EP 1070
DI 10.1149/1.1836584
PG 3
WC Electrochemistry; Materials Science, Coatings & Films
SC Electrochemistry; Materials Science
GA UC203
UT WOS:A1996UC20300057
ER
PT J
AU Wunderlich, B
AF Wunderlich, B
TI Thermal analysis of macromolecules - A personal review
SO JOURNAL OF THERMAL ANALYSIS
LA English
DT Review
DE DDTA; DSC; macromolecules
ID HEAT-CAPACITY MEASUREMENTS; EXTENDED-CHAIN CRYSTALS; SOLID LINEAR
MACROMOLECULES; CARBON BACKBONE POLYMERS; ATOMIC FORCE MICROSCOPY;
THERMODYNAMIC PROPERTIES; GLASS-TRANSITION; PHASE-TRANSITIONS;
POLY(ETHYLENE OXIDE); MELTING BEHAVIOR
AB This review traces the development of thermal analysis over the last 40 years as it was experienced and contributed to by the author. The article touches upon the beginning of calorimetry and thermal analysis of polymers, the development of differential scanning calorimetry (DSC), single run DSC and other special instrumentations, up to the recent addition of modulation to calorimetry. Many new words and phrases have been introduced to the field by the author and his students, leaving a trail of the varied interests one can have over 40 years. It began with ''cold crystallization'' and most recently the term ''oriented, intermediate phase'' was coined, creating in-between: ''extended chain crystals,'' the ''irreversible thermodynamics of melting of polymer crystals,'' ''dynamic differential thermal analysis'' (DDTA), ''the rule of constant increase of C-p per mobile bead within a molecule at the glass transition temperature,'' ''superheating of polymer crystals,'' ''melting kinetics,'' ''crystallization during polymerization,'' the ''chain-folding principle, ''molecular nucleation,'' ''rigid amorphous phase,'' a ''system of classifying molecules, ''macroconformations,'' ''amorphous defects,'' ''rules for the entropy of fusion based on molecular shape and flexibility, '' ''single-molecule single-crystals,'' ''a system of classifying phases and mesophases,'' and ''condis phase''.
C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831.
RP Wunderlich, B (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA.
NR 226
TC 16
Z9 16
U1 2
U2 21
PU JOHN WILEY & SONS LTD
PI W SUSSEX
PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD
SN 0368-4466
J9 J THERM ANAL
JI J. Therm. Anal.
PD MAR-APR
PY 1996
VL 46
IS 3-4
BP 643
EP 679
DI 10.1007/BF01983596
PG 37
WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical
SC Thermodynamics; Chemistry
GA UL067
UT WOS:A1996UL06700002
ER
PT J
AU Kreitmeier, SN
Liang, GL
Noid, DW
Sumpter, BG
AF Kreitmeier, SN
Liang, GL
Noid, DW
Sumpter, BG
TI Thermal analysis via molecular dynamics simulation
SO JOURNAL OF THERMAL ANALYSIS
LA English
DT Article
DE anharmonicity; computer simulations; crystal; gauche defects; heat
capacity; molecular dynamics; paraffin; polyethylene; thermal analysis
ID CRYSTALLINE POLYETHYLENE; HEAT-CAPACITY; CONFORMATIONAL DISORDER;
POLYMETHYLENE CRYSTALS; LINEAR MACROMOLECULES; COMPUTER-SIMULATION;
POLYMERS; DEFECTS; DETAILS; STATE
AB Thermal analysis by classical molecular dynamics simulations is discussed on hand of heat capacity of crystals of 9600 atoms. The differences between quantum mechanical and classical mechanical calculations are shown. Anharmonicity is proven to be an important factor. Finally, it is found that defects contribute to an increase in heat capacity before melting. The energy of conformational gauche defects within the crystal is only about 10% due to internal rotation. The other energy must be generated by cooperative strain. The conclusion is that the next generation of faster computers may permit wider use of molecular dynamics simulations in support of the interpretation of thermal analysis.
C1 UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996.
OAK RIDGE NATL LAB,CHEM & ANALYT SCI DIV,OAK RIDGE,TN 37831.
RI Sumpter, Bobby/C-9459-2013
OI Sumpter, Bobby/0000-0001-6341-0355
NR 38
TC 4
Z9 4
U1 0
U2 4
PU JOHN WILEY & SONS LTD
PI W SUSSEX
PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD
SN 0368-4466
J9 J THERM ANAL
JI J. Therm. Anal.
PD MAR-APR
PY 1996
VL 46
IS 3-4
BP 853
EP 869
DI 10.1007/BF01983606
PG 17
WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical
SC Thermodynamics; Chemistry
GA UL067
UT WOS:A1996UL06700012
ER
PT J
AU Pyda, M
VarmaNair, M
Chen, W
Aldrich, HS
Schlosberg, RH
Wunderlich, B
AF Pyda, M
VarmaNair, M
Chen, W
Aldrich, HS
Schlosberg, RH
Wunderlich, B
TI Analysis of a symmetric neopolyol ester .1. Measurement and calculation
of heat capacity
SO JOURNAL OF THERMAL ANALYSIS
LA English
DT Article
DE conformational disorder; crystal; DSC; glass; glass transition; heat
capacity; melting transition; tetra[methyleneoxycarbonyl
(2,4,4-trimethyl) pentyl] methane
ID SOLID LINEAR MACROMOLECULES; ALIPHATIC POLYESTERS; THERMAL-PROPERTIES;
ADDITION SCHEME; STATE; VIBRATIONS; CONVERSION; POLYMERS; DSC; CV
AB Quantitative thermal analysis was carried out for tetra[methyleneoxycarbonyl(2,4,4-trimethyl)pentyl]methane. The ester has a glass transition temperature of 219 K and a melting temperature of 304 K. The heat of fusion is 51.3 kJ mol(-1), and the increase in heat capacity at the glass transition is 250 J K-1 mol(-1). The measured and calculated heat capacities of the solid and liquid states from 130 to 420 K are reported and a discussion of the glass and melting transitions is presented. The computation of the heat capacity made use of the Advanced Thermal Analysis System, ATHAS, using an approximate group-vibration spectrum and a Tarasov treatment of the skeletal vibrations. The experimental and calculated heat capacities of the solid ester were compared over the whole temperature range to detect changes in order and the presence of large-amplitude motion. An addition scheme for heat capacities of this and related esters was developed and used for the extrapolation of the heat capacity of the liquid state for this ester. The liquid heat capacity for the title ester is well represented by 691.1 +/- 1.668 T [J K-1 mol(-1)]. A deficit in the entropy and enthalpy of fusion was observed relative to values estimated from empirical addition schemes, but no gradual disordering was noted outside the transition region. The final interpretation of this deficit of conformational entropy needs structure and mobility analysis by solid state C-13 NMR and X-ray diffraction. These analyses are reported in part II of this investigation.
C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831.
EXXON CHEM CO,CORP RES,LINDEN,NJ 07036.
EXXON CHEM CO,BASIC CHEM & INTERMEDIATES TECHNOL,CLINTON,NJ 08801.
RP Pyda, M (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA.
NR 27
TC 3
Z9 3
U1 0
U2 3
PU JOHN WILEY & SONS LTD
PI W SUSSEX
PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD
SN 0368-4466
J9 J THERM ANAL
JI J. Therm. Anal.
PD MAR-APR
PY 1996
VL 46
IS 3-4
BP 1093
EP 1111
DI 10.1007/BF01983623
PG 19
WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical
SC Thermodynamics; Chemistry
GA UL067
UT WOS:A1996UL06700029
ER
PT J
AU Chen, W
Habenschuss, A
Pyda, M
VarmaNair, M
Aldrich, HS
Wunderlich, B
AF Chen, W
Habenschuss, A
Pyda, M
VarmaNair, M
Aldrich, HS
Wunderlich, B
TI Analysis of a symmetric neopolyol ester .2. Solid state UC NMR and X-ray
measurements
SO JOURNAL OF THERMAL ANALYSIS
LA English
DT Article
DE chiral molecule; conformational disorder and motion; crystal; DSC; heat
capacity; gamma-gauche effect; glass; glass transition; melting
transition; molecular mechanics computations;
tetra[[methyleneoxycarbonyl (2,4,4-trimethyl) pentyl] methane; solid
state C-13 NMR; X-ray diffraction
ID CONDIS CRYSTALS; SMALL MOLECULES; ALKYLAMMONIUM SALTS; C-13 NMR; = BR;
MESOPHASES; MOTION; DISORDER; HOMOLOGS; OOBPD
AB The symmetric neopolyol ester tetra[methyleneoxycarbonyl(2,4,4-trimethyl)pentyl]methane (MOCPM) has been studied by variable-temperature solid-state C-13 NMR and X-ray powder diffraction and compared to molecular mechanics calculations of the molecular structure. Between melting and glass transition temperatures the material is semicrystalline, consisting of two conformationally and motionally distinguishable phases. The more mobile phase is liquid-like and is, thus attributed to an amorphous phase (approximate to 16%). The branches of the molecules in the crystal exhibit two conformationally distinguishable behaviors. In one, the branches are well ordered (approximate to 56%), in the other, the branches are conformationally disordered (approximate to 28%). Different branches of the same molecule may show different conformational order. This unique character of the rigid phase is the reason for the deficit of the entropy of fusion observed earlier by DSC. In the melt, solid state NMR can identify two bonds that are rotationally immobile, even though the molecules as a whole have liquid-like mobility. This partial rigidity of the branches accounts quantitatively for the observed increase in heat capacity at the glass transition. The reason for this unique behavior of MOCPM, a small molecule, is the existence of one chiral centers in each of the four arms of the molecule. A statistical model assuming that at least two of the chiral centers must fit into the order of the crystal can explain the crystallization behavior and would require 12.5% amorphous phase, 28.1% conformational disorder, and 59.4% crystallinity, close to the observed maximum perfection.
C1 OAK RIDGE NATL LAB,DIV CHEM & ANALYT SCI,OAK RIDGE,TN 37831.
EXXON RES & ENGN CO,CORP RES,LINDEN,NJ 07036.
RP Chen, W (reprint author), UNIV TENNESSEE,DEPT CHEM,KNOXVILLE,TN 37996, USA.
NR 36
TC 3
Z9 3
U1 0
U2 1
PU JOHN WILEY & SONS LTD
PI W SUSSEX
PA BAFFINS LANE CHICHESTER, W SUSSEX, ENGLAND PO19 1UD
SN 0368-4466
J9 J THERM ANAL
JI J. Therm. Anal.
PD MAR-APR
PY 1996
VL 46
IS 3-4
BP 1113
EP 1132
DI 10.1007/BF01983624
PG 20
WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical
SC Thermodynamics; Chemistry
GA UL067
UT WOS:A1996UL06700030
ER
PT J
AU Sumpter, BG
Noid, DW
AF Sumpter, BG
Noid, DW
TI On the use of computational neural networks for the prediction of
polymer properties
SO JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
LA English
DT Article
DE complex backpropagation; computational neural networks; molecular
structure; physical and mechanical properties; polymeric materials;
quantitative structure-property relationships; statistical regression;
unsupervised learning
ID REGRESSION; ARTMAP; MAPS
AB A general purpose computational paradigm using neural networks is shown to be capable of efficiently predicting properties of polymeric compounds based on the structure and composition of the monomeric repeat unit. Results are discussed for the prediction of the heat capacity, glass transition temperature, melting temperature, change in the heat capacity at the glass transition temperature, degradation temperature, tensile strength and modulus, ultimate elongation, and compressive strength for 11 different families of polymers. The accuracies of the predictions range from 1-13% average absolute error. The worst results were obtained for the mechanical properties (tensile strength and modulus: 13%, 7% elongation: 12%, and compressive strength: 8%) and the best results for the thermal properties (heat capacity, glass transition temperature, and melting point: <4%). A simple modification to the overall method is devised to better take into account the fact that the mechanical properties are experimentally determined with a fairly large range (due to variability in measurement procedures and especially the sample). This modification treats the bounds on the range for the mechanical properties as complex numbers (complex, modular neural networks) and leads to more rapid optimization with a smaller average error (reduced by 3%).
RP Sumpter, BG (reprint author), OAK RIDGE NATL LAB, CHEM & ANANLYT SCI DIV, OAK RIDGE, TN 37831 USA.
RI Sumpter, Bobby/C-9459-2013
OI Sumpter, Bobby/0000-0001-6341-0355
NR 44
TC 20
Z9 22
U1 1
U2 1
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 1388-6150
EI 1572-8943
J9 J THERM ANAL CALORIM
JI J. Therm. Anal. Calorim.
PD MAR-APR
PY 1996
VL 46
IS 3-4
BP 833
EP 851
DI 10.1007/BF01983605
PG 19
WC Thermodynamics; Chemistry, Analytical; Chemistry, Physical
SC Thermodynamics; Chemistry
GA UL067
UT WOS:A1996UL06700011
ER
PT J
AU Oberkampf, WL
Talpallikar, M
AF Oberkampf, WL
Talpallikar, M
TI Analysis of a high-velocity oxygen-fuel (HVOF) thermal spray torch .1.
Numerical formulation
SO JOURNAL OF THERMAL SPRAY TECHNOLOGY
LA English
DT Article
DE computational fluid dynamics; gas dynamics; HVOF numerical analysis;
particle dynamics
ID FLOWS
AB The fluid and particle dynamics of a high-velocity oxygen-fuel torch are analyzed using computational fluid dynamic techniques, The thermal spray device analyzed is similar to a Metco Diamond Jet torch with powder feed, The injection nozzle is axisymmetric with powder and a carrier gas injected on the centerline, premixed fuel and oxygen fed from an annulus, and air cooling injected from an annulus along the interior surface of the aircap, The aircap is a conically converging nozzle that achieves choked flow conditions at the exit; a supersonic, underexpanded jet develops externally, A two-dimensional, axisymmetric geometry is assumed; the equations for mass, momentum, and energy conservation are solved for both the gas and the particle phases, The combustion process is modeled using approximate equilibrium chemistry with dissociation of the gas with a total of nine species, Turbulent flow is modeled by a two-equation model for turbulent kinetic energy and dissipation rate that includes compressibility effects on turbulent dissipation, Particles are modeled as a lumped-heat-capacity system and are considered to melt upon attaining the required latent heat of fusion, An iterative, implicit, finite-volume numerical method is used to solve the coupled gas and particle equations inside and outside the torch, A companion paper presents the results of the numerical simulation and discusses in detail the gas and particle dynamics.
C1 SANDIA NATL LABS,AEROSCI & COMPRESSIBLE FLUID DYNAM DEPT,ALBUQUERQUE,NM 87185.
CFD RES CORP,HUNTSVILLE,AL 35805.
NR 21
TC 36
Z9 37
U1 1
U2 12
PU ASM INTERNATIONAL
PI MATERIALS PARK
PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002
SN 1059-9630
J9 J THERM SPRAY TECHN
JI J. Therm. Spray Technol.
PD MAR
PY 1996
VL 5
IS 1
BP 53
EP 61
DI 10.1007/BF02647518
PG 9
WC Materials Science, Coatings & Films
SC Materials Science
GA TX201
UT WOS:A1996TX20100013
ER
PT J
AU Oberkampf, WL
Talpallikar, M
AF Oberkampf, WL
Talpallikar, M
TI Analysis of a high-velocity oxygen-fuel (HVOF) thermal spray torch .2.
Computational results
SO JOURNAL OF THERMAL SPRAY TECHNOLOGY
LA English
DT Article
DE computational fluid dynamics; gas dynamics; HVOF; numerical analysis;
particle dynamics
AB The fluid and particle dynamics of a high-velocity oxygen-fuel (HVOF) torch are analyzed using computational fluid dynamic (CFD) techniques, The thermal spray device analyzed is similar to a Metco Diamond Jet torch with powder injection, The details of the CFD simulation are given in a companion paper, This paper describes the general gas dynamic features of HVOF spraying and then discusses in detail the computational predictions of the present analysis, The gas velocity, temperature, pressure, and Mach number distributions are presented for various locations inside and outside the torch, The two-dimensional numerical simulations show large variations in gas velocity and temperature both inside and outside the torch due to flow features such as mixing layers, shock waves, and expansion waves, Characteristics of the metal spray particle velocity, temperature, trajectory, and phase state (solid or liquid) are also presented and discussed, Particle velocities and temperatures are shown to be lower for this type of torch than previously believed.
C1 SANDIA NATL LABS,AEROSCI & COMPRESSIBLE FLUID DYNAM DEPT,ALBUQUERQUE,NM 87185.
CFD RES CORP,HUNTSVILLE,AL 35805.
NR 5
TC 28
Z9 28
U1 1
U2 4
PU ASM INTERNATIONAL
PI MATERIALS PARK
PA SUBSCRIPTIONS SPECIALIST CUSTOMER SERVICE, MATERIALS PARK, OH 44073-0002
SN 1059-9630
J9 J THERM SPRAY TECHN
JI J. Therm. Spray Technol.
PD MAR
PY 1996
VL 5
IS 1
BP 62
EP 68
DI 10.1007/BF02647519
PG 7
WC Materials Science, Coatings & Films
SC Materials Science
GA TX201
UT WOS:A1996TX20100014
ER
PT J
AU Sasser, LB
Cushing, JA
Mellick, PW
Kalkwarf, DR
Dacre, JC
AF Sasser, LB
Cushing, JA
Mellick, PW
Kalkwarf, DR
Dacre, JC
TI Subchronic toxicity evaluation of lewisite in rats
SO JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH
LA English
DT Article
ID INDUCED GASTRIC TOXICITY; BUTYLATED HYDROXYANISOLE; F344 RATS;
FORESTOMACH; CARCINOMA; LESIONS
AB Health and exposure criteria have not been established fdr lewisite [dichloro(2-chlorovinyl) arsine], a potent toxic vesicant that reacts with the sulfhydryl groups of proteins through its arsenic group. Sixty Sprague-Dawley rats of each sex, 6-7 wk old, were divided into 6 groups (10/group/sex) and gavaged with either 0, 0.01, 0.1, 0.5, 1.0, or 2.0 mg/kg of lewisite in sesame oil 5 d/wk for 13 wk. No significant dose-related change in body weight was observed. At the high dose, serum protein, creatinine, SCOT, and SGPT were decreased in males; lymphocytes and platelets were increased in females. A treatment-related lesion was detected in the forestomach of both sexes at 2.0 mg/kg. These lesions were characterized by necrosis of the stratified squamous epithelium accompanied by infiltration of neutrophils and macrophages, proliferation of neocapillaries, hemorrhage, edema, and fibroblast proliferation. Mild acute inflammation of the glandular stomach was also observed in some cases at 1.0 and 2.0 mg/kg. Early deaths were attributed to severe inflammation of the upper and/or lower respiratory tract, possibly from deposition or reflex of test material into the pharynx. Estimated dose range for NOEL appears to be >0.5 and <1.0 mg/kg when administered orally.
C1 USA, BIOMED RES & DEV LAB, HLTH EFFECTS RES DIV, FREDERICK, MD 21702 USA.
RP Sasser, LB (reprint author), PACIFIC NW LAB, DEPT BIOL & CHEM, POB 999, RICHLAND, WA 99352 USA.
NR 24
TC 8
Z9 8
U1 0
U2 1
PU TAYLOR & FRANCIS
PI BRISTOL
PA 1900 FROST ROAD, SUITE 101, BRISTOL, PA 19007-1598
SN 0098-4108
J9 J TOXICOL ENV HEALTH
JI J. Toxicol. Environ. Health
PD MAR
PY 1996
VL 47
IS 4
BP 321
EP 334
DI 10.1080/009841096161672
PG 14
WC Environmental Sciences; Public, Environmental & Occupational Health;
Toxicology
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
Health; Toxicology
GA UA178
UT WOS:A1996UA17800002
PM 8600286
ER
PT J
AU Jones, K
AF Jones, K
TI Democracy and technology - Sclove,R
SO JOURNAL OF URBAN TECHNOLOGY
LA English
DT Book Review
RP Jones, K (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU SOC URBAN TECHNOLOGY
PI BROOKLYN
PA SUBSCRIPTION DEPT, 300 JAY ST, BROOKLYN, NY 11201
SN 1063-0732
J9 J URBAN TECHNOL
JI J. Urban Technol.
PD SPR
PY 1996
VL 3
IS 2
BP 97
EP 99
PG 3
WC Urban Studies
SC Urban Studies
GA VK497
UT WOS:A1996VK49700008
ER
PT J
AU Hu, K
Houk, RS
AF Hu, K
Houk, RS
TI Ion deposition by inductively coupled plasma mass spectrometry
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
LA English
DT Article
ID PRESSURE; EPITAXY; BEAM; GAAS; SI; GE
AB An atmospheric pressure inductively coupled plasma (ICP) is used with a quadrupole mass spectrometer (MS) for ion deposition. The deposited element is introduced as a nebulized aqueous solution. Modifications to the ICP-MS device allow generation and deposition of a mass-resolved beam of Ho-165(+) at 5X10(12) ions S-1. The ICP is a universal, multielement ion source that can potentially be used for applications such as deposition of mixtures of widely varying stoichiometry or of alternating layers of different elements. (C) 1996 American Vacuum Society.
C1 IOWA STATE UNIV SCI & TECHNOL,US DOE,AMES LAB,DEPT CHEM,AMES,IA 50011.
NR 24
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 0734-2101
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A-Vac. Surf. Films
PD MAR-APR
PY 1996
VL 14
IS 2
BP 370
EP 373
DI 10.1116/1.579903
PG 4
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA UA575
UT WOS:A1996UA57500017
ER
PT J
AU Buss, RJ
Babu, SV
AF Buss, RJ
Babu, SV
TI Synthesis of silicon nitride particles in pulsed radio frequency plasmas
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
LA English
DT Article; Proceedings Paper
CT Dusty Plasmas-95 Workshop on Generation, Transport, and Removal of
Particles in Plasmas
CY OCT 01-07, 1995
CL WICKENBURG, AZ
SP Appl Mat Inc, Balzers Proc Syst, CVC Prod Inc, Dow Chem Co, Mat Res Corp, Novellus Syst Inc, Selwyn Engn & Consulting, SEMATECH, Tegal Corp, Tokyo Electron Ltd US, Texas Instruments Inc, ULVAC Technol, Univ Arizona Fdn, Varian Thin Films Syst Div, Watkins Johnson Co
ID DISCHARGE; POWDERS; SILANE
AB Silicon nitride (hydrogenated) particles are synthesized using a pulsed 13.56 MHz glow discharge. The plasma is modulated with a square-wave on/off cycle of varying period to study the growth kinetics. In situ laser light scattering and ex sial particle analysis are used to study the nucleation and growth. For SiH4/Ar and SiH4/NH3 plasmas, an initial very rapid growth phase is followed by slower growth, approaching the rate of thin film deposition on adjacent flat surfaces. The average particle size can be controlled in the 10-100 nm range by adjusting the plasma-on time. The size dispersion of the particles is large and is consistent with a process of continuous nucleation during the plasma-on period. The large polydispersity is also reported for silicon particles from silane and differs from that reported in other laboratories. The silicon nitride particle morphology is compared to that of silicon and silicon carbide particles generated by the same technique. Whereas Si particles appear as rough clusters of smaller subunits, the SiC particles are smooth spheres, and the Si3N4 particles are smooth but nonspherical. Postplasma oxidation kinetics of the particles are studied with Fourier transform infrared spectra and are consistent with a hydrolysis mechanism proposed in earlier work with continuous plasmas. Heat treatment of the powder in an ammonia atmosphere results in the elimination of hydrogen, rendering the silicon nitride resistant to atmospheric oxidation. (C) 1996 American Vacuum Society.
C1 CLARKSON UNIV,DEPT CHEM ENGN,POTSDAM,NY 13699.
RP Buss, RJ (reprint author), SANDIA NATL LABS,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 12
TC 16
Z9 16
U1 1
U2 5
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 MAR-APR
PY 1996
VL 14
IS 2
BP 577
EP 581
DI 10.1116/1.580148
PG 5
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA UA575
UT WOS:A1996UA57500056
ER
PT J
AU Selwyn, GS
Bailey, AD
AF Selwyn, GS
Bailey, AD
TI Particle contamination characterization in a helicon plasma etching tool
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
LA English
DT Article; Proceedings Paper
CT Dusty Plasmas-95 Workshop on Generation, Transport, and Removal of
Particles in Plasmas
CY OCT 01-07, 1995
CL WICKENBURG, AZ
SP Appl Mat Inc, Balzers Proc Syst, CVC Prod Inc, Dow Chem Co, Mat Res Corp, Novellus Syst Inc, Selwyn Engn & Consulting, SEMATECH, Tegal Corp, Tokyo Electron Ltd US, Texas Instruments Inc, ULVAC Technol, Univ Arizona Fdn, Varian Thin Films Syst Div, Watkins Johnson Co
ID LASER-LIGHT SCATTERING; GLOW-DISCHARGES; PARTICULATE CONTAMINATION;
TRANSPORT; TRAPS
AB There is much current interest regarding the formation, transport, charging, and behavior of particulate contamination in high density plasma tools, as these tools are generally regarded as the future of plasma processing for the semiconductor industry due to the need to obtain greater anisotropy and faster process rates concurrently with reduced surface damage. Because of the low pressures in which these tools typically operate (<5 mTorr), the likelihood of homogeneous nucleation processes leading to particle contamination problems is low. Similarly, the effect of ion drag is also expected to be greater, possibly leading to reduced particle trapping effects. Yet, few laser light scatter studies have been performed in high density plasma tools. This study is the first in situ characterization of particle contamination ina plasma etching tool using a helicon source. It was performed during normal process conditions for poly-Si etching and also under intentionally altered process conditions designed to produce particles. The effect of a bipolar, electrostatic chuck on wafer particle deposition was also investigated. Results showed that under normal process conditions, few particles were deposited onto the wafer; those that were observed were attributed to thermal stress effects resulting in flaking of deposition films, probably on the quartz bell jar of the source. Results also suggest that the electrostatic chuck increased particle deposition when the clamping voltage was applied. No trapping was observed over the wafer or near the source. However, some trapped particles were observed below the wafer platform. These particles showed unusual motion, but probably have minimal effect on wafer contamination. The issues pertaining to particle contamination formation and transport in this high density plasma tool are discussed. (C) 1996 American Vacuum Society.
C1 PLASMA & MAT TECHNOL INC,CHATSWORTH,CA 91311.
RP Selwyn, GS (reprint author), LOS ALAMOS NATL LAB,DIV PHYS,M-S E526,LOS ALAMOS,NM 87545, USA.
NR 27
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 0734-2101
J9 J VAC SCI TECHNOL A
JI J. Vac. Sci. Technol. A-Vac. Surf. Films
PD MAR-APR
PY 1996
VL 14
IS 2
BP 649
EP 654
DI 10.1116/1.580161
PG 6
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA UA575
UT WOS:A1996UA57500069
ER
PT J
AU Choi, SJ
Rader, DJ
Geller, AS
AF Choi, SJ
Rader, DJ
Geller, AS
TI Massively parallel simulations of Brownian dynamics particle transport
in low pressure parallel-plate reactors
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
LA English
DT Article; Proceedings Paper
CT Dusty Plasmas-95 Workshop on Generation, Transport, and Removal of
Particles in Plasmas
CY OCT 01-07, 1995
CL WICKENBURG, AZ
SP Appl Mat Inc, Balzers Proc Syst, CVC Prod Inc, Dow Chem Co, Mat Res Corp, Novellus Syst Inc, Selwyn Engn & Consulting, SEMATECH, Tegal Corp, Tokyo Electron Ltd US, Texas Instruments Inc, ULVAC Technol, Univ Arizona Fdn, Varian Thin Films Syst Div, Watkins Johnson Co
ID STAGNATION-POINT FLOW; DUST PARTICLES; GLOW-DISCHARGES; DEPOSITION;
PLASMAS; FORCES
AB An understanding of particle transport is necessary to reduce contamination of semiconductor wafers during low-pressure processing. The trajectories of particles in these reactors are determined by external forces (the most important being neutral fluid drag, thermophoresis, electrostatic, viscous ion drag, and gravitational), by Brownian motion (due to neutral and charged gas molecule collisions), and by particle inertia. Gas velocity and temperature fields are also needed for particle transport calculations, but conventional continuum fluid approximations break down at low pressures when the gas mean free path becomes comparable to chamber dimensions. Thus, in this work we use a massively parallel direct simulation Monte Carlo method to calculate low-pressure internal gas flow fields which show temperature jump and velocity slip at the reactor boundaries. Because particle residence times can be short compared to particle response times in these low-pressure systems (for which continuum diffusion theory fails), we solve the Langevin equation using a numerical Lagrangian particle tracking model which includes a fluctuating Brownian force. Because of the need for large numbers of particle trajectories to ensure statistical accuracy, the particle tracking model is also implemented on a massively parallel computer. The particle transport model is validated by comparison to the Ornstein-Furth theoretical result for the mean square displacement of a cloud of particles. For long times, the particles tend toward a Maxwellian spatial distribution, while at short times, particle spread is controlled by their initial (Maxwellian) velocity distribution. Several simulations using these techniques are presented for particle transport and deposition in a low pressure, parallel-plate reactor geometry. The corresponding particle collection efficiencies on a wafer for different particle sizes, gas temperature gradients, and gas pressures are evaluated.
RP Choi, SJ (reprint author), SANDIA NATL LABS,ENGN SCI CTR,POB 5800,ALBUQUERQUE,NM 87185, USA.
NR 38
TC 21
Z9 22
U1 0
U2 3
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 MAR-APR
PY 1996
VL 14
IS 2
BP 660
EP 665
DI 10.1116/1.580120
PG 6
WC Materials Science, Coatings & Films; Physics, Applied
SC Materials Science; Physics
GA UA575
UT WOS:A1996UA57500071
ER
PT J
AU Smith, AR
Men, FK
Chao, KJ
Zhang, ZY
Shih, CK
AF Smith, AR
Men, FK
Chao, KJ
Zhang, ZY
Shih, CK
TI Scanning tunneling microscopy investigation of the dimer vacancy-dimer
vacancy interaction on the Si(001) 2xn surface
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
ID SI(100); DISORDER; SI(111); STEPS
AB Scanning tunneling microscopy has been used to investigate the formation of the 2 x n vacancy line structure on Si(001). We find that quenching the surface from high temperatures results in the formation of vacancies. After further quenching, these vacancies nucleate into chains running perpendicular to the dimer rows. Finally, the vacancy chains connect and develop into vacancy lines which extend for many thousands of Angstrom's. Each vacancy line consists of mainly two types of dimer vacancies: (1) a di-vacancy and (2) a combination of a single vacancy and a di-vacancy separated by an isolated dimer. All the vacancy lines together with the dimer rows form a 2 x n structure with 6 less than or equal to n less than or equal to 12. Calculations using the Stillinger-Weber potential support the view that the formation of the vacancy line structure is due to the interaction between vacancies. (C) 1996 American Vacuum Society.
C1 OAK RIDGE NATL LAB,DIV SOLID STATE,OAK RIDGE,TN 37831.
UNIV WISCONSIN,MADISON,WI 53706.
NATL CHUNG CHENG UNIV,DEPT PHYS,CHIAYI,TAIWAN.
RP Smith, AR (reprint author), UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712, USA.
NR 23
TC 14
Z9 14
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 MAR-APR
PY 1996
VL 14
IS 2
BP 909
EP 913
DI 10.1116/1.589173
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000063
ER
PT J
AU Xu, J
Overbury, SH
Wendelken, JF
AF Xu, J
Overbury, SH
Wendelken, JF
TI Laser desorption from and reconstruction on Si(100) surfaces studied by
scanning tunneling microscopy
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
ID DEFECTS; SI(001)
AB Laser irradiated Si(100) surfaces were studied with an ultrahigh vacuum scanning tunneling microscopy system, Our observations indicate that only the dimerized outermost atomic layer is removed if the laser fluence is below the melting threshold at photon energy larger than the band gap. The newly exposed layer, surprisingly, did not have a dimerized atomic structure, but rather, resembled that of a bulk-terminated structure. The uncovered layer remained atomically smooth (no vacancies) even after 90% of the outermost layer was removed. A possible explanation of these observations is that atom removal occurs by a preferential breakage of the atomic bonds in defect sites. When the laser fluence was increased to levels above the melting threshold, extensive surface roughening occurs. (C) 1996 American Vacuum Society.
RP Xu, J (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37831, USA.
RI Overbury, Steven/C-5108-2016
OI Overbury, Steven/0000-0002-5137-3961
NR 23
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 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAR-APR
PY 1996
VL 14
IS 2
BP 918
EP 924
DI 10.1116/1.589175
PG 7
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000065
ER
PT J
AU George, MA
Chen, KT
Collins, WE
Burger, A
Nason, D
Boatner, L
AF George, MA
Chen, KT
Collins, WE
Burger, A
Nason, D
Boatner, L
TI Layered heavy metal iodides examined by atomic force microscopy
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
ID MERCURIC IODIDE; CRYSTALS
AB Atomic force microscopy was used to characterize the surface of semi-insulating bismuth tri-iodide, lead iodide, and mercuric iodide crystals. These heavy metal iodides belong to a unique class of materials that provide a wide range of interesting problems that can be studied by atomic force microscopy. They have relatively high vapor pressures and cannot be examined noninvasively in vacuum conditions, such as by electron microscopy. Mercuric, bismuth, and lead iodide are layered materials with van der Waals bonding along the c axis acid therefore, like mica, can be easily cleaved to provide fresh atomically flat crystalline surfaces to study. These crystals are soft with a high degree of plasticity and, as a result, the surfaces are easily modified by the cantilever tip. They demonstrate reactivity in ambient air at the surfaces as well as within the van der Waals gap. Freshly cleaved surfaces were examined and it was found that single and multiple atomic layers were easily displaced on the cleaved surfaces in all of the crystals when scanned in both contact and modulated contact mode. The effects of cantilever induced modifications of the surfaces of mercuric, lead, and bismuth iodide were studied by atomic force microscopy and their properties are discussed. (C) 1996 American Vacuum Society.
C1 EG&G,EM,GOLETA,CA 93117.
OAK RIDGE NATL LAB,KNOXVILLE,TN 37831.
RP George, MA (reprint author), FISK UNIV,DEPT PHYS,NASHVILLE,TN 37208, USA.
OI Boatner, Lynn/0000-0002-0235-7594
NR 18
TC 12
Z9 12
U1 1
U2 3
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 MAR-APR
PY 1996
VL 14
IS 2
BP 1096
EP 1104
DI 10.1116/1.588407
PG 9
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000103
ER
PT J
AU Herman, GS
Gallagher, MC
Joyce, SA
Peden, CHF
AF Herman, GS
Gallagher, MC
Joyce, SA
Peden, CHF
TI Structure of epitaxial thin TiO2 films on W(110) as studied by low
energy electron diffraction and scanning tunneling microscopy
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
ID SURFACES; ADSORPTION; GROWTH
AB We have studied the growth and structure of thin TiOx films on W(110) using Auger electron spectroscopy, low energy electron diffraction (LEED), and scanning tunneling microscopy (STM). The procedure used to grow these films includes the deposition of Ti metal onto the W(110) surface followed by a saturation oxygen exposure. LEED and STM reveal that several different ordered TiOx film structures can result depending upon the initial amount of Ti deposited and the final annealing temperature, Specifically, the oxidation and anneal to 1350 K of a one monolayer (ML) film of Ti resulted in the formation of a strained ML structure that has a distorted hexagonal lattice acid long-range order as observed by LEED and STM. The epitaxial relationship of this 1 ML TiOx structure with the W(110) substrate is found to occur with a Nishiyama-Wassermann orientation. (C) 1996 American Vacuum Society.
RP Herman, GS (reprint author), PACIFIC NW NATL LAB,ENVIRONM MOLEC SCI LAB,RICHLAND,WA 99352, USA.
RI Joyce, Stephen/Q-7804-2016
OI Joyce, Stephen/0000-0003-1330-7362
NR 21
TC 15
Z9 15
U1 2
U2 4
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 MAR-APR
PY 1996
VL 14
IS 2
BP 1126
EP 1130
DI 10.1116/1.588413
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000109
ER
PT J
AU Jess, P
Hubler, U
Behler, S
ThommenGeiser, V
Lang, HP
Guntherodt, HJ
AF Jess, P
Hubler, U
Behler, S
ThommenGeiser, V
Lang, HP
Guntherodt, HJ
TI Spatially resolved electron tunneling spectroscopy on single crystalline
Rb3C60
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
ID SUPERCONDUCTING ENERGY-GAP; C-60
AB A Rb3C60 single crystal (T-c = 30.5 K) is investigated in the superconducting state at 2.8 K by scanning tunneling microscopy and scanning tunneling spectroscopy (STS). STS data reveals a spatial variation of the superconducting energy gap Delta on a scale of 50 nm (Delta = 2.6-5.2 meV; 2 Delta/k(B)T(c) = 2.0-4.0), This behavior is attributed to varying stoichiometry on the sample surface. An investigation of a Rb3C60 facet shows that I(V) characteristics even vary on molecular scale. I(V) curves acquired between fullerene molecules exhibit a nonvanishing slope at zero bias whereas I(V) characteristics measured above molecules exhibit vanishing slope at zero bias. (C) 1996 American Vacuum Society.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720.
RP Jess, P (reprint author), UNIV BASEL,INST PHYS,KLINGELBERGSTR 82,CH-4056 BASEL,SWITZERLAND.
RI Lang, Hans Peter/G-3884-2011
NR 12
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 1071-1023
J9 J VAC SCI TECHNOL B
JI J. Vac. Sci. Technol. B
PD MAR-APR
PY 1996
VL 14
IS 2
BP 1176
EP 1179
DI 10.1116/1.588508
PG 4
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000120
ER
PT J
AU Carpick, RW
Agrait, N
Ogletree, DF
Salmeron, M
AF Carpick, RW
Agrait, N
Ogletree, DF
Salmeron, M
TI Measurement of interfacial shear (friction) with an ultrahigh vacuum
atomic force microscope
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
ID SCALE FRICTION; SURFACE-ENERGY; LIQUID-FILMS; SLIPPAGE; CONTACT
AB We have studied the variation of frictional force with externally applied load for a Pt-coated atomic force microscope tip in contact with the surface of mica cleaved in ultrahigh vacuum. At low loads, the frictional force varies with load in almost exact proportion to the area of contact as predicted by the Johnson-Kendall-Roberts (JKR) theory [K. L. Johnson, K. Kendall, and A. D. Roberts, Proc. R. Sec. London Ser. A 324, 301 (1971)] of elastic adhesive contacts. The friction-load relation for a deliberately modified tip shape was proportional to an extended JKR model that predicts the area-load relation for nonparabolic tips, The tip shape was determined experimentally with a tip imaging technique and was consistent with the predicted friction behavior. This demonstrates that the frictional force is proportional to the area of contact between the tip and sample. Using the JKR/extended JKR model, interfacial surface energies and shear strengths can be estimated. (C) 1996 American Vacuum Society.
C1 UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720.
UNIV AUTONOMA MADRID,INST CIENCIA MAT NICOLAS CABRERA,LAB BAJAS TEMP,E-28049 MADRID,SPAIN.
RP Carpick, RW (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720, USA.
RI Agrait, Nicolas/D-9048-2014; Ogletree, D Frank/D-9833-2016
OI Agrait, Nicolas/0000-0003-4840-5851; Ogletree, D
Frank/0000-0002-8159-0182
NR 35
TC 231
Z9 234
U1 5
U2 42
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 MAR-APR
PY 1996
VL 14
IS 2
BP 1289
EP 1295
DI 10.1116/1.589083
PG 7
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000146
ER
PT J
AU Chen, GY
Warmack, RJ
Oden, PI
Thundat, T
AF Chen, GY
Warmack, RJ
Oden, PI
Thundat, T
TI Transient response of tapping scanning force microscopy in liquids
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
AB Tapping-mode scanning force microscopy in liquids is usually accomplished by acoustic excitation of the cantilever because of the strong viscous damping. Contact of the tip with the sample surface results in a damping of the cantilever amplitude with an anharmonic response. This interaction is modeled as a viscous-damped, one-dimensional harmonic oscillator periodically perturbed by an exponential surface potential. Experimental results verify the validity of the model. (C) 1996 American Vacuum Society.
C1 UNIV TENNESSEE,DEPT PHYS & ASTRON,KNOXVILLE,TN 37996.
RP Chen, GY (reprint author), OAK RIDGE NATL LAB,HLTH SCI RES DIV,OAK RIDGE,TN 37831, USA.
NR 16
TC 48
Z9 48
U1 0
U2 5
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 MAR-APR
PY 1996
VL 14
IS 2
BP 1313
EP 1317
DI 10.1116/1.589087
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000150
ER
PT J
AU Hu, J
Carpick, RW
Salmeron, M
Xiao, XD
AF Hu, J
Carpick, RW
Salmeron, M
Xiao, XD
TI Imaging and manipulation of nanometer-size liquid droplets by scanning
polarization force microscopy
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
AB Using atomic force microscopy in noncontact mode, we have imaged nanometer-size liquid droplets of KOH water solutions on the surfaces of highly oriented pyrolitic graphite and mica, On graphite the droplets prefer to be adsorbed on atomic step edges. Droplets on the same step tend to be evenly spaced and of similar size. The droplets can be manipulated by the atomic force microscopy tip allowing the controllable formation of droplet patterns on the surface. (C) 1996 American Vacuum Society.
C1 HONG KONG UNIV SCI & TECHNOL,DEPT PHYS,HONG KONG,HONG KONG.
ACAD SINICA,SHANGHAI INST NUCL RES,SHANGHAI 201800,PEOPLES R CHINA.
UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720.
RP Hu, J (reprint author), UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV SCI MAT,BERKELEY,CA 94720, USA.
NR 5
TC 45
Z9 45
U1 0
U2 6
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 MAR-APR
PY 1996
VL 14
IS 2
BP 1341
EP 1343
DI 10.1116/1.589093
PG 3
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000156
ER
PT J
AU Lio, A
Reichert, A
Nagy, JO
Salmeron, M
Charych, DH
AF Lio, A
Reichert, A
Nagy, JO
Salmeron, M
Charych, DH
TI Atomic force microscope study of chromatic transitions in
polydiacetylene thin films
SO JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
LA English
DT Article; Proceedings Paper
CT 8th International Conference on Scanning Tunneling Microscopy and
Related Methods (STM 95)
CY JUL 25-29, 1995
CL SNOWMASS, CO
SP Amer Vacuum Soc, AVS Nanometerscale Sci & Technol Div, Naval Res Lab, USN, Off Naval Res, USA Res Off, Natl Sci Fdn
ID THERMOCHROMIC PHASE-TRANSITION; SINGLE-CRYSTALS; RESONANCE RAMAN;
POLY(DIACETYLENES); BEHAVIOR; SILICON
AB Despite decades of study, the exact mechanism for chromatic transitions in polydiacetylene materials remains somewhat elusive. The mechanism of the blue to red color transition for overcompressed mixed lipid thin films of 10,12 pentacosadiynoic acid has been investigated by atomic force microscopy. Blue layers were prepared by the horizontal Langmuir-Schaefer deposition method. The red form was attained by thermal annealing of blue films !thermochromism). The blue films reveal micro-sized domains. Each domain shows a stripelike morphology on top of a nearly complete layer. The polymer backbone direction shows a high degree of order. A partial disorder is shown to exist along the interbackbone direction. Our study of the red form films indicates that changes occur in the micron-scale morphology of the films. Interestingly the alkyl side chains rearrange into a completely ordered structure and remain ordered well beyond the transition temperature (70 degrees C < T < 90 degrees C). Our results strongly suggest that the reorganization of the side chains is the origin of the thermochromic effect for these films. (C) 1996 American Vacuum Society.
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720.
UNIV GLASGOW,DEPT ELECTR,GLASGOW G12 8QQ,LANARK,SCOTLAND.
NR 20
TC 32
Z9 32
U1 1
U2 6
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 MAR-APR
PY 1996
VL 14
IS 2
BP 1481
EP 1485
DI 10.1116/1.589123
PG 5
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology;
Physics, Applied
SC Engineering; Science & Technology - Other Topics; Physics
GA UH890
UT WOS:A1996UH89000186
ER
PT J
AU Gao, F
Morrison, SG
Robertson, DL
Thornton, CL
Craig, S
Karlsson, G
Sodroski, J
Morgado, M
GalvaoCastro, B
vonBriesen, H
Beddows, S
Weber, J
Sharp, PM
Shaw, GM
Hahn, BH
Osmanov, S
Heyward, WL
Esparza, J
vandePerre, P
Karita, E
Sempala, S
Tugume, B
Biryahwaho, B
Wasi, C
RubsamenWaigmann, H
Holmes, H
Newberry, A
Ranjbar, S
Tomlinson, P
Bradac, J
Mullins, JI
Delwart, EL
CheingsongPopov, R
Kaleebu, P
Myers, G
Korber, BTM
Chiphangwi, J
Taha, T
Desormeaux, J
Eiumtrakul, S
Natpratan, C
Khamboonruang, C
Miotti, P
Halsey, NA
Vlahov, D
Nelson, KE
Phair, J
Cao, Y
Moore, JP
Ho, DD
Matocha, M
Fowler, A
Dilworth, S
Sharma, O
Brown, R
Dusing, S
Whitman, J
Hoekzema, D
Vogel, F
AF Gao, F
Morrison, SG
Robertson, DL
Thornton, CL
Craig, S
Karlsson, G
Sodroski, J
Morgado, M
GalvaoCastro, B
vonBriesen, H
Beddows, S
Weber, J
Sharp, PM
Shaw, GM
Hahn, BH
Osmanov, S
Heyward, WL
Esparza, J
vandePerre, P
Karita, E
Sempala, S
Tugume, B
Biryahwaho, B
Wasi, C
RubsamenWaigmann, H
Holmes, H
Newberry, A
Ranjbar, S
Tomlinson, P
Bradac, J
Mullins, JI
Delwart, EL
CheingsongPopov, R
Kaleebu, P
Myers, G
Korber, BTM
Chiphangwi, J
Taha, T
Desormeaux, J
Eiumtrakul, S
Natpratan, C
Khamboonruang, C
Miotti, P
Halsey, NA
Vlahov, D
Nelson, KE
Phair, J
Cao, Y
Moore, JP
Ho, DD
Matocha, M
Fowler, A
Dilworth, S
Sharma, O
Brown, R
Dusing, S
Whitman, J
Hoekzema, D
Vogel, F
TI Molecular cloning and analysis of functional envelope genes from human
immunodeficiency virus type 1 sequence subtypes A through G
SO JOURNAL OF VIROLOGY
LA English
DT Review
ID HIGHLY CYTOPATHIC STRAIN; CYTOPLASMIC DOMAIN; NUCLEOTIDE-SEQUENCES;
PROTEIN SEQUENCES; AIDS VIRUS; HIV-1; DIVERSITY; ENV; GAG;
IDENTIFICATION
AB Present knowledge of human immunodeficiency virus type 1 (HIV-1) envelope immunobiology has been derived almost exclusively from analyses of subtype B viruses, yet such viruses represent only a minority of strains currently spreading worldwide. To generate a more representative panel of genetically diverse envelope genes, we PCR amplified, cloned, and sequenced complete gp160 coding regions of 35 primary (peripheral blood mononuclear cell-propagated) HTV-1 isolates collected at major epicenters of the current AIDS pandemic. Analysis of their deduced amino acid sequences revealed several important differences from prototypic subtype B strains, including changes in the number and distribution of cysteine residues, substantial length differences in hypervariable regions, and premature truncations in the gp41 domain. Moreover, transiently expressed glycoprotein precursor molecules varied considerably in both size and carbohydrate content. Phylogenetic analyses of full-length env sequences indicated that the panel included members of all major sequence subtypes of HTV-1 group M (clades A to G), as well as an intersubtype recombinant (FIB) from an infected individual in Brazil. In addition, all subtype E and three subtype G viruses initially classified on the basis of partial env sequences were found to cluster in subtype A in the 3' half of their gp41 coding region, suggesting that they are also recombinant. The biological activity of PCR-derived env genes was examined in a single-round virus infectivity assay, This analysis identified 20 clones, including 1 from each subtype (or recombinant), which expressed fully functional envelope glycoproteins. One of these, derived from a patient with rapid CD4 cell decline, contained an amino acid substitution in a highly conserved endocytosis signal (Y721C), as well as a premature truncation of its gp41 domain, which lacked 17 amino acids. Several other env constructs mediated virus entry with very poor efficiency, although they did not contain sequence changes predicted to alter protein function. These results indicate that the env genes of primary HTV-1 isolates collected worldwide can vary considerably in their genetic, phylogenetic, and biological properties. The panel of env constructs described here should prove valuable for future structure-function studies of naturally occurring envelope glycoproteins as well as AIDS vaccine development efforts targeted against a broader spectrum of viruses.
C1 UNIV ALABAMA,DEPT MED,BIRMINGHAM,AL 35294.
UNIV ALABAMA,DEPT MICROBIOL,BIRMINGHAM,AL 35294.
UNIV NOTTINGHAM,QUEENS MED CTR,DEPT GENET,NOTTINGHAM NG7 2RD,ENGLAND.
UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED,ST MARYS HOSP,SCH MED,DEPT COMMUNICABLE DIS,LONDON W2 1PG,ENGLAND.
DANA FARBER CANC INST,DEPT PATHOL,BOSTON,MA 02115.
FIOCRUZ MS,INST OSWALDO CRUZ,DEPT IMMUNOL,RIO JANEIRO,BRAZIL.
FIOCRUZ MS,CTR PESQUISA GONCALO MONIZ,ADV LAB PUBL HLTH,SALVADOR,BA,BRAZIL.
GEORG SPEYER HAUS,CHEMOTHERAPEUT FORSCHUNGSINST,FRANKFURT,GERMANY.
WHO,GLOBAL PROGRAMME AIDS,GENEVA,SWITZERLAND.
NATL AIDS CONTROL PROGRAM,KIGALI,RWANDA.
INST TROP MED,B-2000 ANTWERP,BELGIUM.
UGANDA VIRUS RES INST,ENTEBBE,UGANDA.
MAHIDOL UNIV,SIRIRAJ HOSP,BANGKOK 10700,THAILAND.
NATL INST BIOL STAND & CONTROLS,LONDON NW3 6RB,ENGLAND.
UNIV WASHINGTON,SEATTLE,WA 98195.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
MALAWI COLL MED,BLANTYRE,MALAWI.
CTR DEV & SANTE,PORT AU PRINCE,HAITI.
ROYAL THAI ARMY HOSP,CHIANG MAI,THAILAND.
ROYAL THAI MINIST PUBL HLTH,CHIANG MAI,THAILAND.
CHIANG MAI UNIV,CHIANG MAI 50000,THAILAND.
JOHNS HOPKINS UNIV,SCH HYG & PUBL HLTH,BALTIMORE,MD.
NORTHWESTERN UNIV,CHICAGO,IL 60611.
AARON DIAMOND AIDS RES CTR,NEW YORK,NY.
NIAID,AIDS RES & REFERENCE REAGENT PROGRAM,BETHESDA,MD 20892.
NIAID,AIDS VACCINE REAGENT PROGRAM,BETHESDA,MD 20892.
RI Sharp, Paul/F-5783-2010; Van de Perre, Philippe/B-9692-2008
OI Sharp, Paul/0000-0001-9771-543X; Van de Perre,
Philippe/0000-0002-3912-0427
FU NIAID NIH HHS [N01AI35170, P30 AI27767, R01AI25291]
NR 104
TC 248
Z9 261
U1 2
U2 8
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 MAR
PY 1996
VL 70
IS 3
BP 1651
EP 1667
PG 17
WC Virology
SC Virology
GA TV696
UT WOS:A1996TV69600039
PM 8627686
ER
PT J
AU Moore, JP
Cao, YZ
Leu, J
Qin, L
Korber, B
Ho, DD
AF Moore, JP
Cao, YZ
Leu, J
Qin, L
Korber, B
Ho, DD
TI Inter- and intraclade neutralization of human immunodeficiency virus
type 1: Genetic clades do not correspond to neutralization serotypes but
partially correspond to gp120 antigenic serotypes (vol 70, pg 427, 1996)
SO JOURNAL OF VIROLOGY
LA English
DT Correction, Addition
C1 NYU,SCH MED,AARON DIAMOND AIDS RES CTR,NEW YORK,NY 10016.
LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545.
NR 1
TC 0
Z9 0
U1 0
U2 0
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 MAR
PY 1996
VL 70
IS 3
BP 2074
EP 2074
PG 1
WC Virology
SC Virology
GA TV696
UT WOS:A1996TV69600093
ER
PT J
AU Ramsay, EC
Munson, L
Lowenstine, L
Fowler, ME
AF Ramsay, EC
Munson, L
Lowenstine, L
Fowler, ME
TI A retrospective study of neoplasia in a collection of captive snakes
SO JOURNAL OF ZOO AND WILDLIFE MEDICINE
LA English
DT Article
DE reptile; snake; epidemiology; sarcoma; carcinoma; neoplasia
AB A retrospective study of neoplasia in a collection of snakes was conducted due to the large number of neoplasms observed in 1991. Individual snake necropsies, medical records, and inventory records at the Sacramento Zoo were reviewed for the period 1 July 1981-30 June 1991. Twenty-nine neoplasms were diagnosed in 20 individual snakes. Nineteen neoplasms were of epithelial origin, and 10 were of mesenchymal origin. Twenty-two (76%) neoplasms were considered malignant, and five neoplasms had metastases. Seven of 10 mesenchymal neoplasms were poorly differentiated spindle cell sarcomas. Five snakes had multiple types of neoplasms. Thirteen neoplasms were detected clinically and diagnosed antemortem. The annual rate of neoplasia for the population ranged from 0% to 14.1% and increased dramatically from 1988 to 1991. No specific type of neoplasm was more prevalent during this increase. The annual rate of neoplasia at necropsy ranged from 0% to 70% and was 23.1% for the 10-yr study period.
C1 LAWRENCE LIVERMORE NATL LAB,SCH VET MED,DEPT PATHOL,DAVIS,CA 95616.
UNIV TENNESSEE,COLL VET MED,DEPT PATHOBIOL,KNOXVILLE,TN 37901.
LAWRENCE LIVERMORE NATL LAB,SCH VET MED,DEPT MED,DAVIS,CA 95616.
RP Ramsay, EC (reprint author), UNIV TENNESSEE,COLL VET MED,DEPT ENVIRONM PRACTICE,POB 1971,KNOXVILLE,TN 37901, USA.
NR 12
TC 29
Z9 30
U1 1
U2 10
PU AMER ASSOC Z00 VETERINARIANS
PI MEDIA
PA 6 NORTH PENNELL ROAD, MEDIA, PA 19063
SN 1042-7260
J9 J ZOO WILDLIFE MED
JI J. Zoo Wildl. Med.
PD MAR
PY 1996
VL 27
IS 1
BP 28
EP 34
PG 7
WC Veterinary Sciences
SC Veterinary Sciences
GA WK434
UT WOS:A1996WK43400003
ER
PT J
AU Trebino, R
DeLong, KW
Fittinghoff, DN
Sweetser, JN
Krumbuegel, H
Bowie, J
AF Trebino, R
DeLong, KW
Fittinghoff, DN
Sweetser, JN
Krumbuegel, H
Bowie, J
TI The musical score, the failure of the fundamental theorem of algebra in
two dimensions, and the measurement of ultrashort laser pulses
SO LASER PHYSICS
LA English
DT Article; Proceedings Paper
CT International Symposium on Laser Physics (MPLP 95)
CY AUG 28-SEP 02, 1995
CL ADADEMGORODOK, NOVOSIBIRSK, RUSSIA
SP Russian Acad Sci, Inst Laser Phys, Russian Acad Sci, Inst Spectroscopy
HO ADADEMGORODOK
ID PHASE RETRIEVAL; RECONSTRUCTION
RP Trebino, R (reprint author), SANDIA NATL LABS,COMBUST RES FACIL,LIVERMORE,CA 94551, USA.
NR 19
TC 0
Z9 0
U1 1
U2 3
PU INTERPERIODICA
PI BIRMINGHAM
PA PO BOX 1831, BIRMINGHAM, AL 35201-1831
SN 1054-660X
J9 LASER PHYS
JI Laser Phys.
PD MAR-APR
PY 1996
VL 6
IS 2
BP 252
EP 255
PG 4
WC Optics; Physics, Applied
SC Optics; Physics
GA UJ891
UT WOS:A1996UJ89100009
ER
PT J
AU Greenberger, JS
Anderson, J
Berry, LA
Epperly, M
Cronkite, EP
Boggs, SS
AF Greenberger, JS
Anderson, J
Berry, LA
Epperly, M
Cronkite, EP
Boggs, SS
TI Effects of irradiation of CBA CA mice on hematopoietic stem cells and
stromal cells in long-term bone marrow cultures
SO LEUKEMIA
LA English
DT Article
DE irradiation; LTBMC
ID INDUCED MYELOID-LEUKEMIA; LOW-DOSE RATE; PROGENITOR CELLS; INVITRO;
CHROMOSOME-2; LINES; VIRUS; LEUKEMOGENESIS; DELETION; CAPACITY
AB Following 200 cGy total body irradiation, 20-25% of CBA/Ca mice and their CBA/B and CBA/H sublines develop myeloid leukemia, To determine whether hematologic changes in vitro were detectable, long-term marrow cultures (LTBMCs) were established from the right and left hind limbs of 11 individual control and 11 CBA/B mice 100-114 days after 200 cGy total body irradiation. Individual cultures were studied weekly for cumulative production of nonadherent cells and colony-forming, hematopoietic progenitor cells. Control cultures produced significantly more nonadherent cells over 25 weeks in long-term marrow culture compared to those from irradiated (treated) mice. Permanent stromal cell lines were established from control and irradiated CBA/B mouse LTBMCs and clonal sublines were established. The stromal cell lines from LTBMCs of in vivo irradiated CBA/B mice had uniformly lower plating efficiencies, and only one formed a permanent clonal subline at 100-fold lower frequency compared to stromal cell lines from control mouse LTBMCs. The irradiation sensitivity of both uncloned and clonal sublines was similar by single-hit, multihit or by linear quadratic formula, Cocultivation of an IL-3-dependent hematopoietic progenitor cell line established from a control CBA/B, LTBMC with control or irradiated stromal cell lines derived from either a control (CC3) or the one successfully cloned in vivo irradiated (CT4) LTBMC, produced few cobblestone islands in the presence of IL-3. In contrast, formation of cobblestone islands in the presence of L cell-conditioned medium as a source of M-CSF was significantly greater, and these persisted for 21 days on both CC3 and CT4 stromal lines. The data provide evidence for irradiation induced changes in the bone marrow stromal cell compartment of CBA/B mice which persist and are detectable in vitro 6 months after explant of the cells to culture. These marrow stromal cell lines may provide valuable resources for analyzing the molecular biologic changes in the hematopoietic microenvironment during irradiation leukemogenesis.
C1 BROOKHAVEN NATL LABS,DEPT BIOL,LONG ISL CITY,NY.
RP Greenberger, JS (reprint author), UNIV PITTSBURGH,PRESBYTERIAN HOSP,MED CTR,DEPT RADIAT ONCOL,CANC INST,200 LOTHROP ST,PITTSBURGH,PA 15213, USA.
FU NCI NIH HHS [CA39851]; NIDCR NIH HHS [DE08798]
NR 35
TC 28
Z9 30
U1 0
U2 0
PU STOCKTON PRESS
PI BASINGSTOKE
PA HOUNDMILLS, BASINGSTOKE, HAMPSHIRE, ENGLAND RG21 6XS
SN 0887-6924
J9 LEUKEMIA
JI Leukemia
PD MAR
PY 1996
VL 10
IS 3
BP 514
EP 527
PG 14
WC Oncology; Hematology
SC Oncology; Hematology
GA UF396
UT WOS:A1996UF39600021
PM 8642871
ER
PT J
AU Hoffman, SMG
Hromas, R
Amemiya, C
Mohrenweiser, HW
AF Hoffman, SMG
Hromas, R
Amemiya, C
Mohrenweiser, HW
TI The location of MZF-1 at the telomere of human chromosome 19q makes it
vulnerable to degeneration in aging cells
SO LEUKEMIA RESEARCH
LA English
DT Article
DE telomeric degeneration; MZF-1; hematopoesis
ID ZINC FINGER GENE
AB A zinc-finger gene encoding a transcription factor that regulates hematopoiesis, MZF-1, is located at the extreme end of the q arm of human chromosome 19. Several lines of evidence indicate that MZF-1 lies less than 20 kb from the subtelomeric repeat region of 19q. Telomeres are known to degenerate as cells age; disruption of MZF-1 due to telomeric degeneration may play a role in the increased incidence of leukemia in the elderly. Copyright (C) 1996 Elsevier Science Ltd.
C1 INDIANA UNIV,MED CTR,WALTHER ONCOL CTR,DEPT MED,DIV HEMATOL ONCOL,INDIANAPOLIS,IN 46202.
LAWRENCE LIVERMORE NATL LAB,CTR HUMAN GENOME,BIOL & BIOTECHNOL RES PROGRAM,LIVERMORE,CA 94551.
FU NHLBI NIH HHS [HL48914]
NR 8
TC 9
Z9 9
U1 0
U2 1
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0145-2126
J9 LEUKEMIA RES
JI Leuk. Res.
PD MAR
PY 1996
VL 20
IS 3
BP 281
EP 283
DI 10.1016/0145-2126(95)00158-1
PG 3
WC Oncology; Hematology
SC Oncology; Hematology
GA UL024
UT WOS:A1996UL02400010
PM 8637224
ER
PT J
AU Smith, SA
Brumley, R
AF Smith, SA
Brumley, R
TI Prioritizing firm order costs and vendor services
SO LIBRARY ACQUISITIONS-PRACTICE AND THEORY
LA English
DT Article
AB Conference participants were ''transformed'' into bookselling companies, given a compilation of financial data and asked to develop business plans. The companies were expected to increase the contribution earned, maintain competitive service, consider the realities of the market and make decisions that reflected the values deemed important by the ''employees,'' One goal of the exercise was to introduce acquisitions and collection development librarians to the complexities and ambiguities of the business decisions faced by vendors. Another was to prepare librarians for the negotiations associated with outsourcing. The methods and results of the exercise are discussed.
C1 OREGON STATE UNIV LIB,ACQUISIT DIV,CORVALLIS,OR 97331.
RP Smith, SA (reprint author), PACIFIC NW NO TIER,POB 14650,PORTLAND,OR 97214, USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD, ENGLAND OX5 1GB
SN 0364-6408
J9 LIBR ACQUIS PRACT TH
JI Libr. Acquis.-Pract. Theory
PD SPR
PY 1996
VL 20
IS 1
BP 57
EP 63
DI 10.1016/0364-6408(95)00080-1
PG 7
WC Information Science & Library Science
SC Information Science & Library Science
GA TY207
UT WOS:A1996TY20700008
ER
PT J
AU Jenkins, RA
Palausky, MA
Counts, RW
Guerin, MR
Dindal, AB
Bayne, CK
AF Jenkins, RA
Palausky, MA
Counts, RW
Guerin, MR
Dindal, AB
Bayne, CK
TI Determination of personal exposure of non-smokers to environmental
tobacco smoke in the United States
SO LUNG CANCER
LA English
DT Article; Proceedings Paper
CT International Symposium on Lifestyle Factors and Human Lung Cancer
CY DEC 12-16, 1994
CL GUANGZHOU, PEOPLES R CHINA
SP Guangzhou Med Coll, China, New York Med Coll, US
DE environmental tobacco smoke exposure; ETS exposure; personal monitoring
of ETS exposure; ETS exposure, home and workplace
ID SOLANESOL; NICOTINE
AB The potential health effects of exposure to environmental tobacco smoke (ETS) is a controversial subject, especially in the United States. Most studies on this subject have relied on reports of exposure from interviews or from questionnaires administered to the subjects. Other studies have derived data from actual measurements of markers of ETS in areas where tobacco products, especially cigarettes, are ''being smoked'' and the exposure of the subjects have been extrapolated from the values obtained. In this study, measurements of airborne ETS markers were made in similar to 1000 non-smokers in the US, who wore personal air sampling systems ''at work'' and ''away from work''. Participants in this study stated that they had not used tobacco products, nicotine patches, or nicotine gum for at least 6 months. It was found that the largest concentrations of ETS markers were encountered ''away from work'' and that, in general, the amount of ETS to which the subjects were exposed was markedly lower than those estimated in previous studies. Additionally, it appears that there is an important difference between the exposure to ETS perceived by participants and the actual exposures measured in this study.
RP Jenkins, RA (reprint author), OAK RIDGE NATL LAB,OAK RIDGE,TN 37830, USA.
NR 17
TC 7
Z9 8
U1 0
U2 0
PU ELSEVIER SCI IRELAND LTD
PI CLARE
PA CUSTOMER RELATIONS MANAGER, BAY 15, SHANNON INDUSTRIAL ESTATE CO, CLARE,
IRELAND
SN 0169-5002
J9 LUNG CANCER-J IASLC
JI Lung Cancer
PD MAR
PY 1996
VL 14
SU 1
BP S195
EP S213
PG 19
WC Oncology; Respiratory System
SC Oncology; Respiratory System
GA UE523
UT WOS:A1996UE52300018
PM 8785663
ER
PT J
AU McBreen, J
Yang, XQ
Lee, HS
Okamoto, Y
AF McBreen, J
Yang, XQ
Lee, HS
Okamoto, Y
TI X-ray absorption studies of NiBr2(PEO)(8) and ErBr3(PEO)(12) complexes
SO MACROMOLECULAR SYMPOSIA
LA English
DT Article; Proceedings Paper
CT IUPAC 6th International Symposium on Macromolecule - Metal Complexes
(MMC-VI)
CY NOV 02-05, 1995
CL GUANGZHOU, PEOPLES R CHINA
SP Int Union Pure & Appl Chem
ID POLYMER ELECTROLYTES; ION
AB X-ray absorption studies of the poly(ethylene oxide) (PEO) complex NiBr2(PEO)(8) show the formation of Br bridged dimers and higher aggregates. The Ni is complexed with Br and also with O atoms from the PEG. Aggregate formation increases with increasing temperature. In the case of ErBr3(PEO)(12) the Er is simply complexed with Br and O. There is no evidence of aggregate formation.
C1 POLYTECH INST NEW YORK,BROOKLYN,NY 11201.
RP McBreen, J (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973, USA.
NR 11
TC 1
Z9 1
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 1022-1360
J9 MACROMOL SYMP
JI Macromol. Symp.
PD MAR
PY 1996
VL 105
BP 185
EP 190
DI 10.1002/masy.19961050126
PG 6
WC Polymer Science
SC Polymer Science
GA UK617
UT WOS:A1996UK61700025
ER
PT J
AU Johnson, DK
Stubbs, LJ
DeLoia, JA
AF Johnson, DK
Stubbs, LJ
DeLoia, JA
TI The mouse cyclin E maps to chromosome 7
SO MAMMALIAN GENOME
LA English
DT Article
C1 UNIV PITTSBURGH,MAGEE WOMENS RES INST,DEPT CELL BIOL & PHYSIOL,PITTSBURGH,PA 15213.
RP Johnson, DK (reprint author), OAK RIDGE NATL LAB,DIV BIOL,POB 2009,OAK RIDGE,TN 37831, USA.
NR 8
TC 3
Z9 3
U1 0
U2 0
PU SPRINGER VERLAG
PI NEW YORK
PA 175 FIFTH AVE, NEW YORK, NY 10010
SN 0938-8990
J9 MAMM GENOME
JI Mamm. Genome
PD MAR
PY 1996
VL 7
IS 3
BP 245
EP 245
DI 10.1007/s003359900278
PG 1
WC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
SC Biochemistry & Molecular Biology; Biotechnology & Applied Microbiology;
Genetics & Heredity
GA TZ847
UT WOS:A1996TZ84700026
PM 8833259
ER
PT J
AU Rau, GH
Riebesell, U
WolfGladrow, D
AF Rau, GH
Riebesell, U
WolfGladrow, D
TI A model of photosynthetic C-13 fractionation by marine phytoplankton
based on diffusive molecular CO2 uptake
SO MARINE ECOLOGY PROGRESS SERIES
LA English
DT Article
DE delta C-13; photosynthesis; isotope fractionation; phytoplankton; CO2;
modeling
ID CARBON ISOTOPE FRACTIONATION; CONCENTRATING MECHANISM; RIBULOSE
BISPHOSPHATE; INORGANIC CARBON; ORGANIC-MATTER; SURFACE-WATER; DIOXIDE;
TEMPERATURE; DELTA-C-13; GROWTH
AB A predictive model of carbon isotope fractionation (epsilon(p)) and abundance (delta(13)C(phyto)) is presented under circumstances where photosynthesis is strictly based on CO2(aq) that passively diffuses into marine phytoplankton cells. Similar to other recent models, the one presented here is based on a formulation where the expression of intracellular enzymatic isotope fractionation relative to that imposed by CO2(aq) transport is scaled by the ratio of intracellular to external [CO2(aq)], c(i)/c(e). Unlike previous models, an explicit calculation of c(i) is made that is dependent on c(e) as well as cell radius, cell growth rate, cell membrane permeability to CO2(aq), temperature, and, to a limited extent, pH and salinity. This allows direct scaling of c(i)/c(e) to each of these factors, and thus a direct prediction of epsilon(p) and delta(13)C(phyto) responses to changes in each of these variables. These responses are described, and, where possible, compared to recent experimental and previous modeling results.
C1 LAWRENCE LIVERMORE NATL LAB, ATMOSPHER & ECOL SCI PROGRAM, LIVERMORE, CA 94550 USA.
ALFRED WEGENER INST POLAR & MARINE RES, D-27515 BREMERHAVEN, GERMANY.
RP Rau, GH (reprint author), UNIV CALIF SANTA CRUZ, INST MARINE SCI, SANTA CRUZ, CA 95064 USA.
RI Wolf-Gladrow, Dieter/E-7666-2010
NR 48
TC 140
Z9 141
U1 1
U2 29
PU INTER-RESEARCH
PI OLDENDORF LUHE
PA NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY
SN 0171-8630
J9 MAR ECOL PROG SER
JI Mar. Ecol.-Prog. Ser.
PD MAR
PY 1996
VL 133
IS 1-3
BP 275
EP 285
DI 10.3354/meps133275
PG 11
WC Ecology; Marine & Freshwater Biology; Oceanography
SC Environmental Sciences & Ecology; Marine & Freshwater Biology;
Oceanography
GA UG429
UT WOS:A1996UG42900023
ER
PT J
AU Gao, Y
Chambers, SA
AF Gao, Y
Chambers, SA
TI MBE growth and characterization of epitaxial TiO2 and Nb-doped TiO2
films
SO MATERIALS LETTERS
LA English
DT Article
DE TiO2; Nb doped TiO2; films; molecular beam epitaxy (MBE) rutile
AB Epitaxial TiO2 and Nb-doped TiO2 thin films have been grown on (110) TiO2 rutile substrates by molecular beam epitaxy using elemental Ti and Nb sources along with an electron cyclotron resonance oxygen plasma source. Film composition was measured by X-ray photoelectron spectroscopy. Reflection high-energy electron diffraction and low-energy electron diffraction patterns reveal excellent long-range crystallographic order and a rutile structure for both TiO2 and Nb-doped TiO2 films. The high degree of similarity in Ti and Nb core-level X-ray photoelectron diffraction angular distributions establishes that Nb is substitutionally incorporated in the rutile lattice. Analysis of the Nb 3d(5/2) core-level binding energy suggests an Nb4+ oxidation state.
RP Gao, Y (reprint author), PACIFIC NW LAB, ENVIRONM MOLEC SCI LAB, POB 999, RICHLAND, WA 99352 USA.
NR 24
TC 19
Z9 23
U1 2
U2 18
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-577X
J9 MATER LETT
JI Mater. Lett.
PD MAR
PY 1996
VL 26
IS 4-5
BP 217
EP 221
DI 10.1016/0167-577X(95)00229-4
PG 5
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA UF725
UT WOS:A1996UF72500003
ER
PT J
AU Kass, MD
Kiggans, JO
Meek, TT
AF Kass, MD
Kiggans, JO
Meek, TT
TI Ultrasonic modification of alumina powder during wet-ball milling
SO MATERIALS LETTERS
LA English
DT Article
DE ultrasound; powder; alumina; comminution; wet-ball milling; particle
size
AB The comminution of unagglomerated alumina powders was enhanced by applying ultrasonic energy during wet-ball milling for 16 h. The resulting powders had significantly finer mean and median particle sizes, narrower particle-size distributions, and less angular morphologies than powders which were conventionally wet-ball milled.
C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831.
UNIV TENNESSEE,DEPT MAT SCI & ENGN,KNOXVILLE,TN 37996.
RP Kass, MD (reprint author), OAK RIDGE NATL LAB,DIV ENGN TECHNOL,POB 2008,OAK RIDGE,TN 37831, USA.
RI kiggans, james/E-1588-2017
OI kiggans, james/0000-0001-5056-665X
NR 10
TC 7
Z9 9
U1 1
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-577X
J9 MATER LETT
JI Mater. Lett.
PD MAR
PY 1996
VL 26
IS 4-5
BP 241
EP 243
DI 10.1016/0167-577X(95)00226-X
PG 3
WC Materials Science, Multidisciplinary; Physics, Applied
SC Materials Science; Physics
GA UF725
UT WOS:A1996UF72500008
ER
PT J
AU Pearton, SJ
Abernathy, CR
Ren, F
Shul, RJ
Kilcoyne, SP
HagerottCrawford, M
Zolper, JC
Wilson, RG
Schwartz, RG
Zavada, JM
AF Pearton, SJ
Abernathy, CR
Ren, F
Shul, RJ
Kilcoyne, SP
HagerottCrawford, M
Zolper, JC
Wilson, RG
Schwartz, RG
Zavada, JM
TI Process development for III-V nitrides
SO MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED
TECHNOLOGY
LA English
DT Article
DE III-V nitrides; GaN; wet etching; dry etching; Ohmic contacts
ID GALLIUM NITRIDE; HETEROJUNCTION; GROWTH; CARBON; FILMS; GAAS
AB Advances in GaN-based electronic and photonic devices requires improved patterning methods, better Ohmic contacts and higher p-type doping levels. In this paper, new developments in dry and wet etching, Ohmic contacts and epitaxial growth of III-V nitrides are reported. We find that high ion density plasmas produce etch rates up to a factor of ten higher than conventional reactive ion etching using the same Cl-2-based chemistries. Similarly, a new wet etch for AIN has been discovered. These new processes make possible devices such as microdisk laser structures and GaAs/AlGaAs heterojunction bipolar transistors with improved InN Ohmic contacts.
C1 AT&T BELL LABS,MURRAY HILL,NJ 07974.
SANDIA NATL LABS,ALBUQUERQUE,NM 87185.
HUGHES RES LABS,MALIBU,CA 90265.
USA,RES OFF,RES TRIANGLE PK,NC 27709.
RP Pearton, SJ (reprint author), UNIV FLORIDA,GAINESVILLE,FL 32611, USA.
NR 37
TC 4
Z9 4
U1 1
U2 2
PU ELSEVIER SCIENCE SA LAUSANNE
PI LAUSANNE 1
PA PO BOX 564, 1001 LAUSANNE 1, SWITZERLAND
SN 0921-5107
J9 MAT SCI ENG B-SOLID
JI Mater. Sci. Eng. B-Solid State Mater. Adv. Technol.
PD MAR
PY 1996
VL 38
IS 1-2
BP 138
EP 146
DI 10.1016/0921-5107(95)01516-7
PG 9
WC Materials Science, Multidisciplinary; Physics, Condensed Matter
SC Materials Science; Physics
GA UN289
UT WOS:A1996UN28900022
ER
PT J
AU LaBrecque, DJ
Ramirez, AL
Daily, WD
Binley, AM
Schima, SA
AF LaBrecque, DJ
Ramirez, AL
Daily, WD
Binley, AM
Schima, SA
TI ERT monitoring on environmental remediation processes
SO MEASUREMENT SCIENCE AND TECHNOLOGY
LA English
DT Article
ID AIR
AB The use of electrical resistance tomography (ERT) to monitor new environmental remediation processes is addressed. An overview of the ERT method, including design of surveys and interpretation, is given. Proper design and lay-out of boreholes and electrodes are important for successful results. Data are collected using an automated collection system and interpreted using a nonlinear least squares inversion algorithm. Case histories are given for three remediation technologies: Joule (ohmic) heating, in which clay layers are heated electrically; air sparging, the injection of air below the water table; and electrokinetic treatment, which moves ions by applying an electric current. For Joule heating, a case history is given for an experiment near Savannah River, Georgia, USA. The target for Joule heating was a clay layer of variable thickness. During the early stages of heating, ERT images show increases in conductivity due to the increased temperatures. Later, the conductivities decreased as the system became dehydrated. For air sparging, a case history from Florence, Oregon, USA is described. Air was injected into a sandy aquifer at the site of a former service station. Successive images clearly show the changes in shape of the region of air saturation with time. The monitoring of an electrokinetic laboratory test on core samples is shown. The electrokinetic treatment creates a large change in the core resistivity, decreasing near the anode and increasing near the cathode. Although remediation efforts were successful both at Savannah River and at Florence, in neither case did experiments progress entirely as predicted. At Savannah River, the effects of heating and venting were not uniform and at Florence the radius of air flow was smaller than expected. Most sites are not as well characterized as these two sites. Improving remediation methods requires an understanding of the movements of heat, air, fluids and ions in the sub-surface which ERT can provide. The Florence site provides an excellent example of using information from ERT to improve a remediation system design. At Florence, the injection well used too long a sand pack in the injection zone which decreased the injection depth and thus the zone of influence of the system. Though in retrospect this is obvious, it would not have been noticed without ERT.
C1 LAWRENCE LIVERMORE NATL LAB, GEOL ENGN GRP, LIVERMORE, CA 94550 USA.
UNIV LANCASTER, INST ENVIRONM & BIOL SCI, CTR RES ENVIRONM SYST & STAT, LANCASTER LA1 4YQ, ENGLAND.
RP UNIV ARIZONA, DEPT MIN & GEOL ENGN, BLDG 12, TUCSON, AZ 85721 USA.
RI Binley, Andrew/C-2487-2013
OI Binley, Andrew/0000-0002-0938-9070
NR 20
TC 55
Z9 55
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0957-0233
EI 1361-6501
J9 MEAS SCI TECHNOL
JI Meas. Sci. Technol.
PD MAR
PY 1996
VL 7
IS 3
BP 375
EP 383
DI 10.1088/0957-0233/7/3/019
PG 9
WC Engineering, Multidisciplinary; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA UB933
UT WOS:A1996UB93300019
ER
PT J
AU Kurz, W
Trivedi, R
AF Kurz, W
Trivedi, R
TI Banded solidification microstructures
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article; Proceedings Paper
CT Symposium on Analysis and Modeling of Solidification
CY OCT 02-06, 1994
CL ROSEMONT, IL
SP TMS Solidification Comm
ID RAPID DIRECTIONAL SOLIDIFICATION; AG-CU ALLOYS; LASER SURFACE-TREATMENT;
INSTABILITIES; GROWTH
AB Banded microstructures are composed of alternate structures or phases which develop mostly parallel to the transformation front. At low growth velocities, bands of the same microstructure but with different scales form through periodic fluctuations of the solidification system. On the other hand, banding can occur as a transformation microstructure when the growth front becomes unstable to oscillations. This instability is either due, at low velocities, to nucleation of another phase (peritectics) or, at high velocities, to nonequilibrium effects at the interface which lead to periodic changes of the microstructure. In this article, the inherent banded patterns of low velocity peritectic solidification and high velocity nonequilibrium solidification will be presented and their origin will be discussed.
C1 US DOE,AMES LAB,AMES,IA 50011.
IOWA STATE UNIV SCI & TECHNOL,DEPT MAT SCI & ENGN,AMES,IA 50011.
RP Kurz, W (reprint author), SWISS FED INST TECHNOL,DEPT MAT,CH-1015 LAUSANNE,SWITZERLAND.
NR 52
TC 51
Z9 55
U1 2
U2 17
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAR
PY 1996
VL 27
IS 3
BP 625
EP 634
DI 10.1007/BF02648951
PG 10
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA UC668
UT WOS:A1996UC66800010
ER
PT J
AU Isono, N
Smith, PM
Turnbull, D
Aziz, MJ
AF Isono, N
Smith, PM
Turnbull, D
Aziz, MJ
TI Anomalous diffusion of Fe in liquid Al measured by the pulsed laser
technique
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID RESOLVED TEMPERATURE-MEASUREMENTS; SI; INTERFACE; ALUMINUM; ALLOYS
AB The diffusivity of Fe and Cu in liquid Al was measured by using a nanosecond-duration pulsed laser to melt thin Al films ion implanted with solute. The thin film geometry eliminates convection in the melt during the experiment. The time-dependent electrical conductance and optical reflectance of the Al film during melting were measured to determine the melt duration, allowing the diffusivity to be calculated based on the one-dimensional broadening of an ion-implanted solute depth profile. The measured diffusivity of Cu is about three times that of Fe, which is consistent with Turnbull's cluster model for liquid Al-Fe. The diffusion coefficients measured for both Fe and Cu changed very little as the peak concentration decreased with time, implying little or no concentration dependence. The temperature dependence of the diffusivity was examined by using heat-flow simulations to extract temperature information from the transient conductance data. Our results for Fe diffusion in liquid Al are consistent, within experimental uncertainties, with extrapolations of Ejima's data to lower temperatures, but we observe Cu diffusivities approximately twice as large as would be expected from extrapolations of Ejima's data.
C1 HARVARD UNIV,DIV APPL SCI,CAMBRIDGE,MA 02138.
LAWRENCE LIVERMORE NATL LAB,LIVERMORE,CA 94550.
RP Isono, N (reprint author), KOBE STEEL LTD,COPPER RES DEPT,SHIMONOSEKI,YAMAGUCHI 572,JAPAN.
NR 22
TC 13
Z9 14
U1 0
U2 3
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAR
PY 1996
VL 27
IS 3
BP 725
EP 730
DI 10.1007/BF02648959
PG 6
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA UC668
UT WOS:A1996UC66800018
ER
PT J
AU Babu, SS
David, SA
Vitek, JM
Miller, MK
AF Babu, SS
David, SA
Vitek, JM
Miller, MK
TI Phase stability and atom probe field ion microscopy of type 308 CRE
stainless steel weld metal
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
ID GRAIN-BOUNDARY SEGREGATION; BORON; BEHAVIOR
AB Improvement in high-temperature creep-rupture properties of type 308 stainless steel welds due to the controlled addition of boron is related to microstructural evolution during welding and thermal phase stability at creep service temperatures. The microstructure of boron-containing type 308 austenitic stainless steel welds, in the as-welded state, consisted of 8 to 10 pct ferrite in an austenite matrix. Atom probe field ion microscopy studies revealed segregation of boron and carbon to ferrite-austenite boundaries in the as-welded state; the segregation level was less than one monolayer coverage. On aging at 923 K for 100 hours, M(23)C(6) carbides precipitated at ferrite-austenite boundaries. On further aging at 923 K for 1000 hours, the ferrite transformed into sigma phase. Similar microstructural evolution was observed in a type 308 stainless steel weld without boron addition. The volume fractions of M(23)C(6) carbides were identical in boron-containing and boron-free welds. Atom probe results from the welds with boron addition in the aged condition showed that the boron dissolved in the M(23)C(6) carbides. However, lattice parameter analysis showed no apparent difference in the extracted carbides from the welds with and without boron. Creep property improvement due to boron addition could not be related to any change in the volume fraction of carbides. However, the results suggest that the incorporation of boron into M(23)C(6) carbides may reduce the tendency for cavity formation along the M(23)C(6) carbide-austenite boundaries and hence improve the resistance to creep fracture. The observed microstructural evolution in welds is consistent with thermodynamic calculations by THERMOCALC software.
C1 OAK RIDGE NATL LAB,DIV MET & CERAM,OAK RIDGE,TN 37831.
RP Babu, SS (reprint author), PENN STATE UNIV,UNIVERSITY PK,PA 16802, USA.
RI Babu, Sudarsanam/D-1694-2010
OI Babu, Sudarsanam/0000-0002-3531-2579
NR 36
TC 17
Z9 17
U1 1
U2 7
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAR
PY 1996
VL 27
IS 3
BP 763
EP 774
DI 10.1007/BF02648964
PG 12
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA UC668
UT WOS:A1996UC66800023
ER
PT J
AU Elmer, JW
Wong, J
Froba, M
Waide, PA
Larson, EM
AF Elmer, JW
Wong, J
Froba, M
Waide, PA
Larson, EM
TI Analysis of heat-affected zone phase transformations using in situ
spatially resolved X-ray diffraction with synchrotron radiation
SO METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND
MATERIALS SCIENCE
LA English
DT Article
AB Spatially resolved X-ray diffraction (SRXRD) consists of producing a submillimeter size X-ray beam from an intense synchrotron radiation source to perform real-time diffraction measurements on solid materials. This technique was used in this study to investigate the crystal phases surrounding a liquid weld pool in commercial purity titanium and to determine the location of the phase boundary separating the high-temperature body-centered-cubic (bcc) beta phase from the low-temperature hexagonal-close-packed (hcp) alpha phase. The experiments were carried out at the Stanford Synchrotron Radiation Laboratory (SSRL) using a 0.25 x 0.50 mm X-ray probe that could be positioned with 10-mu m precision on the surface of a quasistationary gas tungsten are weld (GTAW). The SRXRD patterns were collected using a position-sensitive photodiode array in a theta-2 theta geometry. For this probe size, integration times of 10 s/scan at each location on the specimen were found adequate to produce high signal-to-noise (SM) ratios and quality diffraction patterns for phase identification, thus allowing real-time diffraction measurements to be made during welding. The SRXRD results showed characteristic hcp, bcc, and liquid diffraction patterns at various points along the sample, starting from the base metal through the heat-affected zone (HAZ) and into the weld pool, respectively. Analyses of the SRXRD data show the coexistence of bcc and hcp phases in the partially transformed (outer) region of the HAZ and single-phase bcc in the fully transformed (inner) region of the HAZ. Postweld metallographic examinations of the HAZ, combined with a conduction-based thermal model of the weld, were correlated with the SRXRD results. Finally, analysis of the diffraction intensities of the hcp and bcc phases was performed on the SRXRD data to provide additional information about the microstructural conditions that may exist in the HAZ at temperature during welding. This work represents the first direct in situ mapping of phase boundaries in fusion welds.
C1 LAWRENCE LIVERMORE NATL LAB,DEPT MECH ENGN,LIVERMORE,CA 94551.
GRAND CANYON UNIV,COLL SCI & ALLIED HLTH,PHOENIX,AZ 85107.
RP Elmer, JW (reprint author), LAWRENCE LIVERMORE NATL LAB,DIV MAT SCI & TECHNOL,LIVERMORE,CA 94551, USA.
RI Froba, Michael/B-2888-2010
NR 32
TC 38
Z9 38
U1 0
U2 4
PU MINERALS METALS MATERIALS SOC
PI WARRENDALE
PA 420 COMMONWEALTH DR, WARRENDALE, PA 15086
SN 1073-5623
J9 METALL MATER TRANS A
JI Metall. Mater. Trans. A-Phys. Metall. Mater. Sci.
PD MAR
PY 1996
VL 27
IS 3
BP 775
EP 783
DI 10.1007/BF02648965
PG 9
WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical
Engineering
SC Materials Science; Metallurgy & Metallurgical Engineering
GA UC668
UT WOS:A1996UC66800024
ER
PT J
AU Weinberg, AM
AF Weinberg, AM
TI Edward Shils and the ''governmentalisation'' of science
SO MINERVA
LA English
DT Article
RP Weinberg, AM (reprint author), OAK RIDGE ASSOCIATED UNIV,OAK RIDGE,TN 37831, USA.
NR 14
TC 1
Z9 1
U1 0
U2 0
PU MINERVA
PI LONDON
PA 19 NOTTINGHAM ROAD, LONDON, ENGLAND SW17 7EA
SN 0026-4695
J9 MINERVA
JI Minerva
PD SPR
PY 1996
VL 34
IS 1
BP 39
EP 43
DI 10.1007/BF00124199
PG 5
WC Education & Educational Research; History & Philosophy Of Science;
Social Sciences, Interdisciplinary
SC Education & Educational Research; History & Philosophy of Science;
Social Sciences - Other Topics
GA UM691
UT WOS:A1996UM69100004
ER
PT J
AU Bailey, SM
Goodwin, EH
Meyne, J
Cornforth, MN
AF Bailey, SM
Goodwin, EH
Meyne, J
Cornforth, MN
TI CO-FISH reveals inversions associated with isochromosome formation
SO MUTAGENESIS
LA English
DT Article
ID FLUORESCENCE INSITU HYBRIDIZATION; METAPHASE CHROMOSOMES; ALPHOID DNA;
GAMMA-RAYS; SEQUENCE; CENTROMERES; TELOMERES; (TTAGGG)N; DELETIONS; GENE
AB Despite the likely prevalence and documented biological impact of inverted DNA sequences in humans and other species, our ability to detect them on a routine basis is limited, The technique of chromosome orientation fluorescence in situ hybridization (CO-FISH) was used to detect obligate chromosome inversions associated with isochromosome formation in two human cell lines, Simultaneous hybridization of a strand-specific telomeric probe allowed us to deduce the absolute orientation of repetitive DNA sequences associated with the inverted region, These results show that, in principle, CO-FISH could be used to detect virtually any type of inversion, including those likely to escape detection by other methods. Prospective applications of the technique are discussed in relation to its principal limitation, the present availability of suitable single-stranded DNA probes.
C1 UNIV TEXAS,MED BRANCH,DEPT RADIAT THERAPY,GALVESTON,TX 77555.
LOS ALAMOS NATL LAB,DIV LIFE SCI,LOS ALAMOS,NM 87545.
FU NCI NIH HHS [R01 CA58650]
NR 28
TC 27
Z9 27
U1 0
U2 1
PU OXFORD UNIV PRESS UNITED KINGDOM
PI OXFORD
PA WALTON ST JOURNALS DEPT, OXFORD, ENGLAND OX2 6DP
SN 0267-8357
J9 MUTAGENESIS
JI Mutagenesis
PD MAR
PY 1996
VL 11
IS 2
BP 139
EP 144
DI 10.1093/mutage/11.2.139
PG 6
WC Genetics & Heredity; Toxicology
SC Genetics & Heredity; Toxicology
GA UA515
UT WOS:A1996UA51500002
PM 8671729
ER
PT J
AU Loring, JF
Paszty, C
Rose, A
McIntosh, TK
Mural, H
Pierce, JES
Schramm, SR
Wymore, K
Lee, VMY
Trojanowski, JQ
Peterson, KR
AF Loring, JF
Paszty, C
Rose, A
McIntosh, TK
Mural, H
Pierce, JES
Schramm, SR
Wymore, K
Lee, VMY
Trojanowski, JQ
Peterson, KR
TI Rational design of an animal model for Alzheimer's disease: Introduction
of multiple human genomic transgenes to reproduce AD pathology in a
rodent
SO NEUROBIOLOGY OF AGING
LA English
DT Article
DE Alzheimer's disease; transgenic; mouse; rat; animal model; amyloid
precursor protein; apolipoprotein; genomic transgene; transgene
expression; immunohistochemistry; FAD mutation; brain trauma;
antibodies; cosmid; yeast artificial chromosome
ID AMYLOID PRECURSOR PROTEIN; YEAST ARTIFICIAL CHROMOSOME; HUMAN
APOLIPOPROTEIN-E; GENE; MICE; EXPRESSION; MUTATION; BRAIN; LOCUS; RISK
AB A major obstacle to understanding the pathogenesis of Alzheimer's disease is the lack of easily studied animal models. Our approach is to apply transgenic methods to humanize mice and rats, employing methods that introduce large genomic transgenes, because this improves the level of transgene protein expression and the tissue specificity of expression. Our plan is to reproduce AD pathology in rodents by making them transgenic for several human proteins involved in AD. This report describes transgenic animal lines that we have produced, and summarizes our current approach and future plans. Two human genes known to be involved in AD pathology are the amyloid precursor protein (APP) and the E4 isoform of apolipoprotein E (apoE4). So far, we have produced and analyzed a transgenic line carrying the entire human APP gene cloned in a yeast artificial chromosome. We have also produced but not yet analyzed a mouse carrying the human apoE4 gene. Work is in progress to produce a transgenic line carrying a disease-causing mutation in the human APP gene. As we produce these animals, we are breeding them together, and also breeding them with a mouse line that lacks endogenous apoE, to produce an animal model carrying several human proteins whose interaction is believed to be instrumental in development of AD pathology. These transgenic animals will be useful for dissecting the biochemical and physiological steps leading to AD, and for development of therapies for disease intervention.
C1 GENPHARM INT,MT VIEW,CA 94043.
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,CTR HUMAN GENOME,BERKELEY,CA 94720.
UNIV PENN,SCH MED,DIV NEUROSURG,PHILADELPHIA,PA 19104.
UNIV PENN,SCH MED,DEPT PATHOL & LAB MED,PHILADELPHIA,PA 19104.
UNIV WASHINGTON,DEPT MED,DIV MED GENET,SEATTLE,WA 98195.
FU NICHD NIH HHS [HD28869]; NINDS NIH HHS [NS08803, NS26818]
NR 52
TC 22
Z9 22
U1 1
U2 2
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010
SN 0197-4580
J9 NEUROBIOL AGING
JI Neurobiol. Aging
PD MAR-APR
PY 1996
VL 17
IS 2
BP 173
EP 182
DI 10.1016/0197-4580(95)02076-4
PG 10
WC Geriatrics & Gerontology; Neurosciences
SC Geriatrics & Gerontology; Neurosciences & Neurology
GA UH440
UT WOS:A1996UH44000003
PM 8744398
ER
PT J
AU Volkow, ND
Wang, GJ
Fowler, JS
Logan, J
Hitzemann, R
Gatley, SJ
MacGregor, RR
Wolf, AP
AF Volkow, ND
Wang, GJ
Fowler, JS
Logan, J
Hitzemann, R
Gatley, SJ
MacGregor, RR
Wolf, AP
TI Cocaine uptake is decreased in the brain of detoxified cocaine abusers
SO NEUROPSYCHOPHARMACOLOGY
LA English
DT Article
DE [C-11]cocaine; dopamine transporter; drug dependence; CBF; dopamine
receptors; [F-18]N-methylspiroperidol
ID DOPAMINE TRANSPORTER BINDING; RAT NUCLEUS-ACCUMBENS; POSITRON EMISSION
TOMOGRAPHY; STIMULATED RELEASE; H-3 DOPAMINE; RECEPTOR; WITHDRAWAL;
STRIATUM; SITES; PET
AB Binding of [C-11]cocaine in brain was measured with positron emission tomography in 12 detoxified cocaine abusers and in 20 controls to evaluate if there were changes in cocaine binding and in dopamine (DA) transporter availability associated with chronic cocaine use. Nine con tl ols and 10 cocaine abusers had art additional scan with [18F]N-methylspiroperidol to measure dopamine D-2 receptors. Cocaine abusers had significantly lower uptake of [C-11]cocaine in brain (6.2 +/- 1% dose/cc tissues) than controls (7.7 +/- 2%). The distribution volumes (DV)for [C-11]cocaine were reduced in basal ganglia (BG), cortex, thalamus, and cerebellum (CB) of cocaine abusers. However there were no differences in the ratio of the DV in BG to that in CB, which is an estimate of DA transporter availability Values for DA D-2 receptor availability were decreased in cocaine abusers and did not correlate with estimates of dopamine transporter availability. In summary, detoxified cocaine abusers showed decreased uptake of cocaine in brain but did not show changes in DA transporter availability.
C1 SUNY STONY BROOK,DEPT PSYCHIAT,STONY BROOK,NY 11794.
VET ADM MED CTR,NORTHPORT,NY.
RP Volkow, ND (reprint author), BROOKHAVEN NATL LAB,DEPT MED,UPTON,NY 11973, USA.
FU NIDA NIH HHS [5RO1-DA06891]; NINDS NIH HHS [NS15638]
NR 65
TC 74
Z9 74
U1 4
U2 6
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 655 AVENUE OF THE AMERICAS, NEW YORK, NY 10010
SN 0893-133X
J9 NEUROPSYCHOPHARMACOL
JI Neuropsychopharmacology
PD MAR
PY 1996
VL 14
IS 3
BP 159
EP 168
DI 10.1016/0893-133X(95)00073-M
PG 10
WC Neurosciences; Pharmacology & Pharmacy; Psychiatry
SC Neurosciences & Neurology; Pharmacology & Pharmacy; Psychiatry
GA TY372
UT WOS:A1996TY37200002
PM 8866699
ER
PT J
AU Lipfert, FW
Moskowitz, PD
Fthenakis, VE
Saroff, L
AF Lipfert, FW
Moskowitz, PD
Fthenakis, VE
Saroff, L
TI Probabilistic assessment of health risks of methylmercury from burning
coal
SO NEUROTOXICOLOGY
LA English
DT Article; Proceedings Paper
CT 12th Internatioal Neurotoxicology Conference - Neurotoxicity of Mercury:
Indicators and Effects of Low-Level Exposure
CY OCT 30-NOV 02, 1994
CL HOT SPRINGS, AR
SP Agcy Tox Subst & Dis Registry, Natl Ctr Environm Assessment, US EPA, Natl Human & Environm Effects Res Lab, NIEHS, Cranmer & Associates, Arkansas Dept Hlth, TSI Redfield Lab, Eastman Kodak Co, Univ Arkansas Med Sci, Arkansas Childrens Hosp, US FDA, Natl Ctr Toxicol Res
DE methylmercury; probabilistic risk assessment; coal combustion;
paresthesia; congenital mercury poisoning; fish consumption
ID METHYL MERCURY; EXPOSURE; HAIR
AB This paper describes a probabilistic assessment of neurological risks incurred from consuming fish containing methylmercury (MeHg), focusing on the incremental effects of Hg deposited from local coal combustion. A Monte Carlo model is used to simulate a ''worst case'' scenario in which a population of 5000 fish eaters in the upper midwestern United States derive the freshwater fish portion of their diet from local waters near a hypothetical large coal-fired power plant. This population is characterized by distributions of body mass, half-life of MeHg, and the ratios of blood to body burden and hair to blood MeHg. Each person's diet consists of varying amounts of tuna fish, freshwater sportfish, and marine fish and shellfish, the MeHg contents of which are characterized by national distribution statistics, as are the consumption rates for marine fish. The consumption rates for freshwater fish are specific to the region. The fish portion size is linked to body mass by a variable correlation. Each meal is assumed to be an independent sample; thus, as metabolic equilibrium is approached, each person's body burden of MeHg tends to approach the value corresponding to the mean MeHg intake for the population. Predictions of MeHg levels in hair by this model compared well with an observed distribution of 1437 women.
Two neurological endpoints were examined: adult paresthesia, as related to MeHg body burden, and congenital neurological effects, as associated with average concentrations of MeHg in maternal hair during pregnancy. Two exposure scenarios are considered: a ''baseline'' in which the source of the mercury in fish is from background atmospheric deposition, and an ''impact'' scenario, in which local Hg deposition and concentrations in fish are roughly doubled to represent additional deposition from the hypothetical nearby power plant. For both scenarios, the 99th percentile of MeHg body burden was more than an order of magnitude below the lowest level at which increased transient adult paresthesia was experienced in an acute MeHg poisoning incident in Iraq. We thus conclude that neurological risks to adults from MeHg resulting from atmospheric Hg deposition are trivial. Based on three epidemiological studies of congenital neurological risks, we find that fetal effects appear to be more critical and that there is a smaller margin of safety for pregnant consumers of freshwater sportfish. However, the margin of safety is still considerable and may ha ve been diminished by uncertainties in the relationships between maternal hair Hg and the actual fetal exposures. (C) 1996 Intox Press, Inc.
C1 US DOE,OFF FOSSIL ENERGY,WASHINGTON,DC.
RP Lipfert, FW (reprint author), BROOKHAVEN NATL LAB,DEPT APPL SCI,BLDG 490D,UPTON,NY 11973, USA.
NR 32
TC 17
Z9 17
U1 0
U2 4
PU INTOX PRESS INC
PI LITTLE ROCK
PA PO BOX 24865, LITTLE ROCK, AR 72221
SN 0161-813X
J9 NEUROTOXICOLOGY
JI Neurotoxicology
PD SPR
PY 1996
VL 17
IS 1
BP 197
EP 211
PG 15
WC Neurosciences; Pharmacology & Pharmacy; Toxicology
SC Neurosciences & Neurology; Pharmacology & Pharmacy; Toxicology
GA UQ764
UT WOS:A1996UQ76400019
PM 8784831
ER
PT J
AU Abe, K
Antilogus, P
Aston, D
Baird, K
Baltay, C
Bean, A
BenDavid, R
Bienz, T
Bird, F
Caldwell, DO
CavalliSforza, M
Coller, J
Coyle, P
Coyne, D
Dasu, S
Dima, M
dOliveira, A
Duboscq, J
Dunwoodie, W
Hallewell, G
Hasegawa, K
Hasegawa, Y
Huber, J
Iwasaki, Y
Jacques, P
Johnson, RA
Kalelkar, M
Kawahara, H
Kwon, Y
Leith, DWGS
Liu, X
Lu, A
Manly, S
Martinez, J
Mathys, L
McHugh, S
Meadows, B
Muller, G
Muller, D
Nagamine, T
Narita, S
Nussbaum, M
Pavel, TJ
Plano, R
Ratcliff, B
Rensing, P
Santha, AKS
Schultz, D
Sen, S
Shank, JT
Shapiro, S
Simopoulos, C
Snyder, J
Solodov, E
Stamer, P
Stockdale, I
Suekane, F
Toge, N
Turk, J
Vavra, J
Whitaker, JS
Williams, DA
Williams, SH
Willocq, S
Wilson, RJ
Word, G
Yellin, S
Yuta, H
AF Abe, K
Antilogus, P
Aston, D
Baird, K
Baltay, C
Bean, A
BenDavid, R
Bienz, T
Bird, F
Caldwell, DO
CavalliSforza, M
Coller, J
Coyle, P
Coyne, D
Dasu, S
Dima, M
dOliveira, A
Duboscq, J
Dunwoodie, W
Hallewell, G
Hasegawa, K
Hasegawa, Y
Huber, J
Iwasaki, Y
Jacques, P
Johnson, RA
Kalelkar, M
Kawahara, H
Kwon, Y
Leith, DWGS
Liu, X
Lu, A
Manly, S
Martinez, J
Mathys, L
McHugh, S
Meadows, B
Muller, G
Muller, D
Nagamine, T
Narita, S
Nussbaum, M
Pavel, TJ
Plano, R
Ratcliff, B
Rensing, P
Santha, AKS
Schultz, D
Sen, S
Shank, JT
Shapiro, S
Simopoulos, C
Snyder, J
Solodov, E
Stamer, P
Stockdale, I
Suekane, F
Toge, N
Turk, J
Vavra, J
Whitaker, JS
Williams, DA
Williams, SH
Willocq, S
Wilson, RJ
Word, G
Yellin, S
Yuta, H
TI Operational status and performance of the SLD CRID
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Ring Imaging Cherenkov Detectors (RICH95)
CY JUN 12-16, 1995
CL UPPSALA, SWEDEN
SP Royal Swedish Acad Sci, Nobel Inst Phys, Swedish Nat Sci Res Council
AB The operation and performance of the SLD GRID achieved during the recently completed 1994-95 run of the SLC will be discussed. Stable operation of liquid (C6F14) and gas (85% C5F12 and 15% N-2) radiators with good UV transparency has been achieved. Our expectations for the future SLD physics program will also be briefly discussed.
C1 TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN.
STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309.
RUTGERS STATE UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08855.
YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511.
UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106.
UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064.
BOSTON UNIV,DEPT PHYS,BOSTON,MA 02215.
COLORADO STATE UNIV,DEPT PHYS,FT COLLINS,CO 80523.
UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221.
RI Cavalli-Sforza, Matteo/H-7102-2015;
OI Bean, Alice/0000-0001-5967-8674; Wilson, Robert/0000-0002-8184-4103
NR 7
TC 5
Z9 5
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 1
PY 1996
VL 371
IS 1-2
BP 8
EP 11
DI 10.1016/0168-9002(95)01133-1
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG163
UT WOS:A1996UG16300003
ER
PT J
AU Agakichiev, G
Baur, R
Ceretto, F
Drees, A
Faschingbauer, U
Fraenkel, Z
Fuchs, C
Gatti, E
Glassel, P
Hemberger, M
Holl, P
DelosHeros, CP
Irmscher, D
Kraner, H
Lenkeit, B
Messer, M
Minaev, Y
Panebrattsev, Y
Pfeiffer, A
Ravinovich, I
Razin, S
Rehak, P
Sampietro, M
Schukraft, J
Shimanskiy, S
Socol, E
Specht, HJ
TelZur, G
Tserruya, I
Ullrich, T
Voigt, C
Wurm, JP
Yurevich, V
AF Agakichiev, G
Baur, R
Ceretto, F
Drees, A
Faschingbauer, U
Fraenkel, Z
Fuchs, C
Gatti, E
Glassel, P
Hemberger, M
Holl, P
DelosHeros, CP
Irmscher, D
Kraner, H
Lenkeit, B
Messer, M
Minaev, Y
Panebrattsev, Y
Pfeiffer, A
Ravinovich, I
Razin, S
Rehak, P
Sampietro, M
Schukraft, J
Shimanskiy, S
Socol, E
Specht, HJ
TelZur, G
Tserruya, I
Ullrich, T
Voigt, C
Wurm, JP
Yurevich, V
TI Performance of the CERES electron spectrometer in the CERN SPS lead beam
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Ring Imaging Cherenkov Detectors (RICH95)
CY JUN 12-16, 1995
CL UPPSALA, SWEDEN
SP Royal Swedish Acad Sci, Nobel Inst Phys, Swedish Nat Sci Res Council
ID SILICON
AB CERES is an experiment dedicated to measure e(+)e(-)-pairs in nucleus-nucleus collisions at the CERN SPS. Following the experiences gained with proton and sulfur beams the CERES spectrometer was upgraded to cope with the much larger charged particle densities produced in Pb-Pb collisions. Major parts of the upgrade were completed in time for a 10 days test with a lead beam in November 1994. The results clearly demonstrate the feasibility of the experiment in the environment of central Pb-Pb collisions.
C1 UNIV HEIDELBERG,D-69120 HEIDELBERG,GERMANY.
JOINT INST NUCL RES,DUBNA 141980,RUSSIA.
MAX PLANCK INST KERNPHYS,D-69117 HEIDELBERG,GERMANY.
WEIZMANN INST SCI,IL-76100 REHOVOT,ISRAEL.
POLITECN MILAN,I-20133 MILAN,ITALY.
BROOKHAVEN NATL LAB,UPTON,NY 11973.
CERN,CH-1211 GENEVA 23,SWITZERLAND.
RI Sampietro, Marco/A-3732-2016;
OI Sampietro, Marco/0000-0003-4825-9612; Perez de los Heros,
Carlos/0000-0002-2084-5866
NR 10
TC 9
Z9 9
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 1
PY 1996
VL 371
IS 1-2
BP 16
EP 21
DI 10.1016/0168-9002(95)01135-8
PG 6
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG163
UT WOS:A1996UG16300005
ER
PT J
AU Vavra, J
AF Vavra, J
TI Photon detectors
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Ring Imaging Cherenkov Detectors (RICH95)
CY JUN 12-16, 1995
CL UPPSALA, SWEDEN
SP Royal Swedish Acad Sci, Nobel Inst Phys, Swedish Nat Sci Res Council
ID DELPHI BARREL RICH; LOW-NOISE; TMAE; CHAMBERS; READOUT; COUNTER; GASES
AB This paper compares the photon detectors used to date in high energy physics and astrophysics experiments, with particular emphasis on design features, problems and mistakes. The paper also describes a new direction in the area of photon detection.
RP Vavra, J (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA.
NR 96
TC 37
Z9 37
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 1
PY 1996
VL 371
IS 1-2
BP 33
EP 56
DI 10.1016/0168-9002(95)01138-2
PG 24
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG163
UT WOS:A1996UG16300008
ER
PT J
AU Abe, K
Antilogus, P
Aston, D
Baird, K
Baltay, C
Bean, A
BenDavid, R
Bienz, T
Bird, F
Caldwell, DO
CavalliSforza, M
Coller, J
Coyle, P
Coyne, D
Dasu, S
Dima, M
dOliveira, A
Duboscq, J
Dunwoodie, W
Hallewell, G
Hasegawa, K
Hasegawa, Y
Huber, J
Iwasaki, Y
Jacques, P
Johnson, RA
Kalelkar, M
Kawahara, H
Kwon, Y
Leith, DWGS
Liu, X
Lu, A
Manly, S
Martinez, J
Mathys, L
McHugh, S
Meadows, B
Muller, G
Muller, D
Nagamine, T
Narita, S
Nussbaum, M
Pavel, TJ
Plano, R
Ratcliff, B
Rensing, P
Santha, AKS
Schultz, D
Sen, S
Shank, JT
Shapiro, S
Simopoulos, C
Snyder, J
Solodov, E
Stamer, P
Stockdale, I
Suekane, F
Toge, N
Turk, J
Vavra, J
Whitaker, JS
Williams, DA
Williams, SH
Willocq, S
Wilson, RJ
Word, G
Yellin, S
Yuta, H
AF Abe, K
Antilogus, P
Aston, D
Baird, K
Baltay, C
Bean, A
BenDavid, R
Bienz, T
Bird, F
Caldwell, DO
CavalliSforza, M
Coller, J
Coyle, P
Coyne, D
Dasu, S
Dima, M
dOliveira, A
Duboscq, J
Dunwoodie, W
Hallewell, G
Hasegawa, K
Hasegawa, Y
Huber, J
Iwasaki, Y
Jacques, P
Johnson, RA
Kalelkar, M
Kawahara, H
Kwon, Y
Leith, DWGS
Liu, X
Lu, A
Manly, S
Martinez, J
Mathys, L
McHugh, S
Meadows, B
Muller, G
Muller, D
Nagamine, T
Narita, S
Nussbaum, M
Pavel, TJ
Plano, R
Ratcliff, B
Rensing, P
Santha, AKS
Schultz, D
Sen, S
Shank, JT
Shapiro, S
Simopoulos, C
Snyder, J
Solodov, E
Stamer, P
Stockdale, I
Suekane, F
Toge, N
Turk, J
Vavra, J
Whitaker, JS
Williams, DA
Williams, SH
Willocq, S
Wilson, RJ
Word, G
Yellin, S
Yuta, H
TI Obtaining physics results from the SLD CRID
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Ring Imaging Cherenkov Detectors (RICH95)
CY JUN 12-16, 1995
CL UPPSALA, SWEDEN
SP Royal Swedish Acad Sci, Nobel Inst Phys, Swedish Nat Sci Res Council
AB We describe the likelihood ratio method used for particle identification in the SLD GRID, which allows the use of the entire momentum range covered by the liquid and gas radiators, including the threshold regions. Its application to two preliminary physics analyses is also described.
C1 STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309.
TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN.
RUTGERS STATE UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08855.
YALE UNIV,DEPT PHYS,NEW HAVEN,CT 06511.
UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106.
UNIV CALIF SANTA CRUZ,SANTA CRUZ INST PARTICLE PHYS,SANTA CRUZ,CA 95064.
BOSTON UNIV,DEPT PHYS,BOSTON,MA 02215.
COLORADO STATE UNIV,DEPT PHYS,FT COLLINS,CO 80523.
UNIV CINCINNATI,DEPT PHYS,CINCINNATI,OH 45221.
RI Cavalli-Sforza, Matteo/H-7102-2015;
OI Wilson, Robert/0000-0002-8184-4103
NR 4
TC 6
Z9 6
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 1
PY 1996
VL 371
IS 1-2
BP 195
EP 199
DI 10.1016/0168-9002(95)01156-0
PG 5
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG163
UT WOS:A1996UG16300029
ER
PT J
AU Ratcliff, BN
AF Ratcliff, BN
TI Future high energy physics experiments using RICH detectors: The next
generation
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Ring Imaging Cherenkov Detectors (RICH95)
CY JUN 12-16, 1995
CL UPPSALA, SWEDEN
SP Royal Swedish Acad Sci, Nobel Inst Phys, Swedish Nat Sci Res Council
AB The physics goals and detector designs of high energy physics experiments now under construction that use RICH technology for particle identification are reviewed.
RP Ratcliff, BN (reprint author), STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94309, USA.
NR 20
TC 6
Z9 6
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 1
PY 1996
VL 371
IS 1-2
BP 309
EP 320
DI 10.1016/0168-9002(95)01179-X
PG 12
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG163
UT WOS:A1996UG16300054
ER
PT J
AU Debbe, R
Gushue, S
Moskowitz, B
Olness, J
Videbaek, F
AF Debbe, R
Gushue, S
Moskowitz, B
Olness, J
Videbaek, F
TI The ring imaging Cherenkov detector for the BRAHMS experiment at RHIC
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT 2nd International Workshop on Ring Imaging Cherenkov Detectors (RICH95)
CY JUN 12-16, 1995
CL UPPSALA, SWEDEN
SP Royal Swedish Acad Sci, Nobel Inst Phys, Swedish Nat Sci Res Council
AB A ring imaging Cherenkov counter, to be read out by four 100-channel PMTs, is a key element of the BRAHMS experiment. We report here the most recent results obtained with a prototype tested at the BNL AGS using several radiator gases, including the heavy fluorocarbon C4F10. Ring radii were measured for different particles (pi(-), mu(-), e(-)) for momenta ranging from 2 to 12 GeV/e employing pure C4F10 as radiator.
RP Debbe, R (reprint author), BROOKHAVEN NATL LAB,UPTON,NY 11973, USA.
NR 3
TC 7
Z9 7
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
Equip.
PD MAR 1
PY 1996
VL 371
IS 1-2
BP 327
EP 329
DI 10.1016/0168-9002(95)01182-X
PG 3
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA UG163
UT WOS:A1996UG16300057
ER
PT J
AU Simone, JN
AF Simone, JN
TI Semileptonic decays: An update down under
SO NUCLEAR PHYSICS B
LA English
DT Article; Proceedings Paper
CT Annual International Symposium on Lattice Field Theory
CY JUL 11-15, 1995
CL MELBOURNE, AUSTRALIA
ID LATTICE QCD; MESONS
AB Heavy-meson semileptonic decays calculations on the lattice are reviewed. The focus is upon obtaining reliable matrix elements. Errors that depend upon the lattice spacing, a, are an important source of systematic error. Full O(a) improvement of matrix elements for arbitrary-mass four-component quarks is discussed. With improvement, bottom-quark matrix elements can be calculated directly using current lattices. Momentum dependent errors for O(a)-improved quarks and statistical noise limit momenta to around 1 GeV/c with current lattices. Hence, maximum recoil momenta can be reached for D decays while only a fraction of the maximum recoil momentum can be reliably studied for the light-meson decay modes of the B. Differential decay rates and partial widths are phenomenologically important quantities in B decays that can be reliably determined with present lattices.
RP FERMILAB NATL ACCELERATOR LAB, THEORY GRP, POB 500, BATAVIA, IL 60510 USA.
NR 40
TC 11
Z9 11
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
EI 1873-1562
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAR
PY 1996
SU 47
BP 17
EP 30
DI 10.1016/0920-5632(96)00029-1
PG 14
WC Physics, Particles & Fields
SC Physics
GA UK873
UT WOS:A1996UK87300003
ER
PT J
AU Soni, A
AF Soni, A
TI Weak matrix elements on the lattice - Circa 1995
SO NUCLEAR PHYSICS B
LA English
DT Article; Proceedings Paper
CT Annual International Symposium on Lattice Field Theory
CY JUL 11-15, 1995
CL MELBOURNE, AUSTRALIA
ID PERTURBATION-THEORY; LEADING ORDER; CP-VIOLATION; B-PARAMETER; DECAYS;
MESON; EPSILON'/EPSILON; VIABILITY; QCD
AB Status of weak matrix elements is reviewed. In particular, epsilon'/epsilon, B --> K*gamma, B-K, B-B and B-B. are discussed and the overall situation with respect to the lattice effort and some of its phenomenological implications are summarised. For epsilon'/epsilon the need for the relevant matrix elements is stressed in view of the forthcoming improved experiments. For some of the operators, (e.g. O-s), even bounds on their matrix elements would be very helpful. On B --> K*gamma, a constant behavior of T-2 appears disfavored although dependence of T-2 could, of course, be milder than a simple pole. Improved data is badly needed to settle this important issue firmly, especially in view of its ramification for extractions of V-td from B --> rho gamma. On B-K, the preliminary result from JLQCD appears to contradict Sharpe et al. JLQCD data seems to fit very well to linear a dependence and leads to an appreciably lower value of BK. Four studies of BK in the ''full'' (n(f) = 2) theory indicate very little quenching effects on B-K; the full theory value seems to be just a little less than the quenched result. Based on expectations from HQET, analysis of the B-parameter (B-hl) for the heavy-light mesons via B-hl = constant + constants'/m(ht) is suggested. A summary of an illustrative sample of hadron matrix elements is given and constraints on CKM parameters (e.g. V-td/V-ts), on the unitarity triangle end on x(s)/x(d), emerging from the lattice calculations along with experimental results are briefly discussed. In quite a few cases, for the first time, some indication of quenching errors on weak matrix elements are now becoming available.
RP BROOKHAVEN NATL LAB, DEPT PHYS, UPTON, NY 11973 USA.
NR 89
TC 30
Z9 30
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
EI 1873-1562
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAR
PY 1996
SU 47
BP 43
EP 58
DI 10.1016/0920-5632(96)00031-X
PG 16
WC Physics, Particles & Fields
SC Physics
GA UK873
UT WOS:A1996UK87300005
ER
PT J
AU Sinclair, DK
AF Sinclair, DK
TI Light hadron spectroscopy
SO NUCLEAR PHYSICS B
LA English
DT Article; Proceedings Paper
CT Annual International Symposium on Lattice Field Theory
CY JUL 11-15, 1995
CL MELBOURNE, AUSTRALIA
ID CHIRAL LOGARITHMS; LATTICE; QCD; APPROXIMATION; SPECTRUM
AB I review the progress that has been made in light hadron spectroscopy from lattice QCD, since the LATTICE'94 conference in Bielefeld.
RP ARGONNE NATL LAB, DIV HIGH ENERGY PHYS, 9700 S CASS AVE, ARGONNE, IL 60439 USA.
NR 46
TC 5
Z9 5
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
EI 1873-1562
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAR
PY 1996
SU 47
BP 112
EP 127
DI 10.1016/0920-5632(96)00037-0
PG 16
WC Physics, Particles & Fields
SC Physics
GA UK873
UT WOS:A1996UK87300011
ER
PT J
AU Ooguri, H
AF Ooguri, H
TI N=2 string amplitudes
SO NUCLEAR PHYSICS B
LA English
DT Article; Proceedings Paper
CT Trieste Conference on S-Duality and Mirror Symmetry
CY JUN 05-09, 1995
CL TRIESTE, ITALY
SP Int Ctr Theoret Phys
C1 UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,THEORET PHYS GRP,BERKELEY,CA 94720.
RP Ooguri, H (reprint author), UNIV CALIF BERKELEY,DEPT PHYS,366 LE CONTE HALL,BERKELEY,CA 94720, USA.
RI Ooguri, Hirosi/A-4407-2011;
OI Ooguri, Hirosi/0000-0001-6021-3778
NR 11
TC 0
Z9 0
U1 0
U2 0
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0550-3213
J9 NUCL PHYS B
JI Nucl. Phys. B
PD MAR
PY 1996
SU 46
BP 173
EP 176
DI 10.1016/0920-5632(96)00019-9
PG 4
WC Physics, Particles & Fields
SC Physics
GA UA898
UT WOS:A1996UA89800019
ER
EF