44,394 research outputs found
A 2 h periodic variation in the low-mass X-ray binary Ser X-1
No full textSpectroscopy of the low-mass X-ray binary Ser X-1 using the Gran Telescopio Canarias have revealed a ?2 h periodic variability that is present in the three strongest emission lines. We tentatively interpret this variability as due to orbital motion, making it the first indication of the orbital period of Ser X-1. Together with the fact that the emission lines are remarkably narrow, but still resolved, we show that a main-sequence K dwarf together with a canonical 1.4 M? neutron star gives a good description of the system. In this scenario, the most likely place for the emission lines to arise is the accretion disc, instead of a localized region in the binary (such as the irradiated surface or the stream-impact point), and their narrowness is due instead to the low inclination (?10°) of Ser X-1
Rearrangement of alkylchlorocarbenes: 1,2-H shift in free carbene, carbene-olefin complex, and excited states of carbene precursors
No full textPhotolysis of alkylchlorodiazirines (1) in the presence of olefins gives a cyclopropane (3) by addition of the generated carbene to the olefin and a vinyl chloride derivative (2) resulting from a 1,2-H shift rearrangement. This rearrangement may occur either in the carbene or in some excited state, precursor of the carbene (RIES mechanism), or in a ''carbene + olefin complex'' on the way to the formation of 3 (COC mechanism). Results obtained by time-resolved photoacoustic calorimetry as well as by thermolysis and photolysis of ClCH2C(N-2)Cl and CH3(CH2)(2)C(N-2)Cl in the presence of tetramethylethylene clearly indicate that both the RIES and COC mechanisms play a role but with efficiencies which greatly depend on the nature of the diazirine. Reexamination of the results previously obtained with benzylchlorodiazirines indicates that, for this class of diazirines, the RIES mechanism is temperature dependent and has a very low efficiency at room temperature and below, whereas the nonlinearity of the plots [3]/[2] vs [olefin] is mainly due to the COC mechanism.PT: J; CR: BIGOT B, 1978, J AM CHEM SOC, V100, P8575 CHANG KT, 1979, J AM CHEM SOC, V101, P5082 FREY HM, 1966, ADV PHOTOCHEM, V4, P225 GANZER GA, 1986, J AM CHEM SOC, V108, P1517 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 HEIHOFF K, 1987, BIOCHEMISTRY-US, V22, P1422 HOUK KN, 1984, J AM CHEM SOC, V106, P4291 HOUK KN, 1984, J AM CHEM SOC, V106, P4293 JACKSON JE, 1994, ADV CARBENE CHEM, V1 KANABUSKAMINSKA JM, 1987, J AM CHEM SOC, V109, P5267 LAVILLA JA, 1989, J AM CHEM SOC, V111, P6877 LAVILLA JA, 1989, J AM CHEM SOC, V111, P712 LAVILLA JA, 1990, TETRAHEDRON LETT, V31, P5109 LIU MTH, 1987, J ORG CHEM, V52, P4223 LIU MTH, 1989, J CHEM SOC CHEM COMM, P12 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 MODARELLI DA, 1991, J AM CHEM SOC, V113, P8985 MODARELLI DA, 1992, J AM CHEM SOC, V114, P7034 MOSS RA, 1993, J CHEM SOC CHEM COMM, P1597 MOSS RA, 1994, ADV CARBENE CHEM, V1 MULDER P, 1988, J AM CHEM SOC, V110, P4090 MULLERREMMERS PL, 1985, J AM CHEM SOC, V107, P7275 NI T, 1989, J AM CHEM SOC, V111, P457 NICKON A, 1993, ACCOUNTS CHEM RES, V26, P84 RUDZKI JE, 1985, J AM CHEM SOC, V107, P7849 SKELL PS, 1969, J AM CHEM SOC, V91, P7131 TOMIOKA H, 1984, J AM CHEM SOC, V106, P454 TURRO NJ, 1982, J AM CHEM SOC, V104, P1754 WARNER PM, 1984, TETRAHEDRON LETT, V25, P4211 WESTRICK JA, 1987, BIOCHEMISTRY-US, V26, P8313 WHITE WR, 1992, J ORG CHEM, V57, P2841 WIERLACHER S, 1993, J AM CHEM SOC, V115, P8943 YAMAMOTO N, 1994, J AM CHEM SOC, V116, P2064; NR: 33; TC: 30; J9: J AMER CHEM SOC; PG: 9; GA: UG695Source type: Electronic(1
Catalytic P-H activation by Ti and Zr catalysts
No full textCatalytic dehydrocoupling of phosphines was investigated using the anionic zirconocene trihydride salts [Cp*Zr-2(mu-H)(3)Li](3) (1a) or [Cp*Zr-2(mu-H)(3)K(thf)(4)] (1b), and the metallocycles [CpTi(NPtBu3)(CH2)(4)] (6) and [Cp*M(NPtBu3)(CH2)(4)] (M = Ti 20, Zr 21) as catalyst precursors. Dehydrocoupling of primary phosphines RPH2 (R = Ph, C6H2Me3, Cy, C10H7) gave both dehydrocoupled dimers RP(H)P(H)R or cyclic oligophosphines (RP)(n) (n = 4, 5) while reaction of tBu(3)C(6)H(2)PH(2) gave the phosphaindoline tBu(2)(Me2CCH2)C6H2PH (9). Stoichiometric reactions of these catalyst precursors with primary phosphines afforded [Cp*Zr-2((PR)(2))H][K(thf)(4)] (R = Ph 2, Cy 3, C6H2Me3 4), [Cp*Zr-2((PPh)(3))H] [K(thf)(4)] (5), [CpTi(NPtBu3)(PPh)(3)] (7) and [CpTi(NPtBu3)(mu-PHPh)](2) (8), while reaction of 6 with (C(6)H(2)tBu3)PH2 in the presence of PMe3 afforded [CpTi(NPtBu3)(PMe3)(p(C(6)H(2)tBu(3))] (10). The secondary phosphines Ph2PH and (PhHPCH2)(2)CH2 also undergo dehydrocoupling affording (Ph2P)(2) and (PhPCH2)(2)CH2. The bisphosphines (CH2PH2)(2) and C6H4(PH2)(2) are dehydrocoupled to give (PCH2CH2PH)(2) (12) and (C6H4P(PH))(2) (13) while prolonged reaction of 13 gave (C6H4P2)(8) (14). The analogous bisphosphine Me2C6H4(PH)(2) (17) was prepared and dehydrocoupling catalysis afforded (Me2C6H2P(PH))(2) (18) and subsequently [(Me2C6H2P2)(2)(mu-Me2C6H2P2)](2) (19). Stoichiometric reactions with these bisphosphines gave [Cp*Zr-2(H)(PH)(2)C6H4] [Li(thf)(4)] (22), [Cp*Ti(NPtBu3)(PH)(2)C6H4](2) (23) and [Cp*Ti(NPtBu3)(PH)(2)C6H4] (24). Mechanistic implications are discussed.PT: J; CR: ALBRAND JP, 1976, J CHEM SOC CHEM COMM, P876 ANSELME JP, 1969, TETRAHEDRON, V25, P855 BASULI F, 2003, J AM CHEM SOC, V125, P10170 BAUDLER M, 1976, Z NATURFORSCH B, V31, P558 BAUDLER M, 1978, CHEM BER, V111, P1210 BAUDLER M, 1978, CHEM BER, V111, P1217 BAUDLER M, 1983, CHEM BER, V116, P2711 BAUDLER M, 1984, Z NATURFORSCH B, V39, P438 BAZAN GC, 1991, J AM CHEM SOC, V113, P6899 BOHM VPW, 2001, ANGEW CHEM, V113, P4832 CHAUVIN Y, 1971, MAKROMOL CHEM, V141, P161 COREY JY, 2004, ADV ORGANOMET CHEM, V51, P1 COURET C, 1986, ORGANOMETALLICS, V5, P113 COWLEY AH, 1984, TETRAHEDRON LETT, V25, P2125 COWLEY AH, 1990, INORG SYNTH, V27, P235 CROMER DT, 1974, INT TABLES CRYSTALLO, V4, P71 ETKIN N, 1997, J AM CHEM SOC, V119, P11420 ETKIN N, 1997, J AM CHEM SOC, V119, P2954 ETKIN N, 1997, ORGANOMETALLICS, V16, P3504 FEHLNER TP, 1992, INORGANOMETALLLICS FERMIN MC, 1995, J AM CHEM SOC, V117, P12645 FERMIN MC, 1995, ORGANOMETALLICS, V14, P4247 FU GC, 1993, J AM CHEM SOC, V115, P9856 GAUVIN F, 1998, ADV ORGANOMET CHEM, V42, P363 GRAHAM TW, 2004, ORGANOMETALLICS, V23, P3309 GRUBBS RH, 1972, J AM CHEM SOC, V94, P2538 GRUBBS RH, 2003, HDB METATHESIS HEY E, 1988, CHEM BER, V121, P561 HEY E, 1989, J ORGANOMET CHEM, V378, P375 HO JW, 1991, ORGANOMETALLICS, V10, P3001 HO JW, 1994, INORG CHEM, V33, P865 HOFFMAN PR, 1975, INORG CHEM, V14, P1997 HOSKIN AJ, 2001, ANGEW CHEM, V113, P1917 HOU ZM, 1993, ORGANOMETALLICS, V12, P3158 INAGAKI Y, 1980, B CHEM SOC JPN, V53, P205 ISSLEIB K, 1972, ANGEW CHEM, V84, P582 ISSLEIB K, 1987, J ORGANOMET CHEM, V330, P17 JACOBSEN EN, 1988, J AM CHEM SOC, V110, P1968 KATSUKI T, 1980, J AM CHEM SOC, V102, P5974 KAUFFMANN T, 1984, TETRAHEDRON LETT, V25, P1963 KAUFFMANN T, 1985, CHEM BER, V118, P1022 KITAMURA M, 1988, J AM CHEM SOC, V110, P629 KNOWLES WS, 1983, ACCOUNTS CHEM RES, V16, P106 KOEPF H, 1981, CHEM BER, V114, P2731 KOHLER EP, 1935, J AM CHEM SOC, V57, P367 KYBA EP, 1983, ORGANOMETALLICS, V2, P1877 MILLER AR, 1976, J AM CHEM SOC, V98, P1860 MILLER SJ, 1996, J AM CHEM SOC, V118, P9606 MIYASHITA A, 1980, J AM CHEM SOC, V102, P7932 MURDZEK JS, 1987, ORGANOMETALLICS, V6, P1373 NGUYEN ST, 1992, J AM CHEM SOC, V114, P3974 NGUYEN ST, 1993, J AM CHEM SOC, V115, P9858 NOVAK BM, 1988, J AM CHEM SOC, V110, P960 OHKUMA T, 1995, J AM CHEM SOC, V117, P2675 OHTA T, 1988, INORG CHEM, V27, P566 OSHIKAWA T, 1985, CHEM IND-LONDON, P126 ROCKLAGE SM, 1981, J AM CHEM SOC, V103, P1440 SCHOLL M, 1999, TETRAHEDRON LETT, V40, P2247 SCHROCK RR, 1974, J AM CHEM SOC, V96, P6796 SCHROCK RR, 1980, J MOL CATAL, V8, P73 SCHROCK RR, 1988, J MOL CATAL, V46, P243 SCHROCK RR, 1990, J AM CHEM SOC, V112, P3875 SCHWAB P, 1995, ANGEW CHEM INT EDIT, V34, P2039 SCHWAB P, 1995, ANGEW CHEM, V107, P2179 SCHWAB P, 1996, J AM CHEM SOC, V118, P100 SENDERIKHIN AI, 1988, ZH OBSHCH KHIM+, V58, P1662 SENDERIKHIN AI, 1989, ZH OBSHCH KHIM+, V59, P2141 SEYFERTH D, 1969, J ORG CHEM, V34, P1483 SHELDRICK GM, 2000, SHELXTL SHU RH, 1998, J AM CHEM SOC, V120, P12988 SMIT CN, 1983, TETRAHEDRON LETT, V24, P2031 SOUFFLET JP, 1973, CR ACAD SCI C CHIM, V276, P169 STEPHAN DW, 2000, ANGEW CHEM, V112, P322 STEPHAN DW, 2005, ORGANOMETALLICS, V24, P2548 STRADIOTTO M, 2001, HELV CHIM ACTA, V84, P2958 TILLEY TD, 1990, COMMENTS INORG CHEM, V10, P37 TILLEY TD, 1993, ACCOUNTS CHEM RES, V26, P22 TVERDOMED SN, 2003, RUSS J GEN CHEM+, V73, P319 VANDENWINKEL Y, 1991, J ORGANOMET CHEM, V405, P183 WATERMAN R, 2006, ANGEW CHEM INT EDIT, V45, P2926 WATERMAN R, 2006, ANGEW CHEM, V118, P2992 WEAST RC, 1974, HDB CHEM PHYS, P2436 WOOD CD, 1979, J AM CHEM SOC, V101, P3210 WU Z, 1995, J AM CHEM SOC, V117, P5503 XIN SX, 1997, J AM CHEM SOC, V119, P5307; NR: 85; TC: 0; J9: CHEM-EUR J; PG: 12; GA: 113PJSource type: Electronic(1
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Benzylchlorocarbene: origins of Arrhenius curvature in the kinetics of the 1,2-H shift rearrangement
No full textBenzylchlorocarbene (1, BCC) was generated photochemically from benzylchlorodiazirine (2) in isooctane, methylcyclohexane (MCH), and tetrachloroethane (TCE) at temperatures from similar to 30 to -75 degrees C. At -70 degrees C in isooctane, the identified products included Z/E-beta-chlorostyrenes 4 (46.6%), alpha-chlorostyrene 5 (2.4%), 1,1-dichloro-2-phenylethane 6 (1.9%), a BCC-isooctane insertion product 8 (5.5%), carbene dimers 9 (3.8%), and azine 3 (30%). The significant incursion of intermolecular products 3, 8, and 9 implies that laser flash photolytic (LFP) kinetic data for the decay of BCC obtained at low temperature is biased and should not be employed in Arrhenius analyses. Accordingly, previously obtained curved Arrhenius correlations for BCC do not necessarily implicate quantum mechanical tunneling (QMT) in the 1,2-H shift rearrangement of BCC to 4. Similarly in MCH, where BCC affords a solvent insertion product in similar to 44-53% yield, the curved Arrhenius correlation (Figure 1) cannot be readily interpreted. In polar solvents such as TCE, clean H-shift reactions of BCC are obtained even at -71 degrees C; an Arrhenius correlation of LFP kinetic data is linear from 3 to -71 degrees C (Figure 2), affording E-a = 3.2 kcal mol(-1) and log A = 10.0 s(-1). Therefore, QMT does not appear to play a major role in the 1,2-H shift rearrangement of BCC at ambient or near ambient temperature in solution.PT: J; CR: BONNEAU R, 1996, J AM CHEM SOC, V118, P3829 DEAN JA, 1992, LANGES HDB CHEM DIX EJ, 1993, J AM CHEM SOC, V115, P10424 DOX AW, 1941, ORG SYNTH, V1, P5 GRAHAM WH, 1965, J AM CHEM SOC, V87, P4396 ISAACS NS, 1995, PHYSICAL ORGANIC CHE, P304 JACKSON JE, 1988, J AM CHEM SOC, V110, P5595 KAZANIS S, 1991, J PHYS CHEM-US, V95, P4430 KEATING AE, 1997, COMMUNICATION 0804 LAVILLA JA, 1989, J AM CHEM SOC, V111, P6877 LAVILLA JA, 1990, TETRAHEDRON LETT, V31, P5109 LIU MTH, 1984, TETRAHEDRON, V40, P887 LIU MTH, 1985, CHEM COMMUN, P982 LIU MTH, 1985, J ORG CHEM, V50, P3218 LIU MTH, 1990, J AM CHEM SOC, V112, P3915 LIU MTH, 1992, J AM CHEM SOC, V114, P3604 LIU MTH, 1992, J PHOTOCH PHOTOBIO A, V63, P115 LIU MTH, 1994, ACCOUNTS CHEM RES, V27, P287 LIU MTH, 1994, J PHOTOCH PHOTOBIO A, V84, P133 MODARELLI DA, 1992, J AM CHEM SOC, V114, P7034 MODARELLI DA, 1993, J AM CHEM SOC, V115, P470 MOSS RA, 1987, J AM CHEM SOC, V109, P4341 MOSS RA, 1990, J AM CHEM SOC, V112, P1638 MOSS RA, 1994, ADV CARBENE CHEM, V1, P59 MOSS RA, 1996, J AM CHEM SOC, V118, P12588 MOSS RA, 1997, CHEM COMMUN 0321, P617 MOSS RA, 1997, TETRAHEDRON LETT, V38, P7049 STORER JW, 1993, J AM CHEM SOC, V115, P10426 SUGIYAMA MH, 1992, J AM CHEM SOC, V114, P966 TOMIOKA H, 1984, J AM CHEM SOC, V106, P454 WHITE WR, 1992, J ORG CHEM, V57, P2841 WIERLACHER S, 1993, J AM CHEM SOC, V115, P8943 YEN VQ, 1962, ANN CHIM, V7, P785; NR: 33; TC: 8; J9: J ORG CHEM; PG: 7; GA: ZM109Source type: Electronic(1
Transformation of the endostyle of the anadromous sea lamprey, Petromyzon-marinus L, during metamorphosis .2. Electron-microscopy
No full textPT: J; CR: BARRINGTON EJW, 1956, Q J MICROSC SCI, V97, P393 BARRINGTON EJW, 1975, INTRO GENERAL COMP E BEAMISH FWH, 1975, J ZOOL, V177, P57 BENCOSME SA, 1959, J BIOPHYS BIOCHEM CY, V5, P508 CHENG H, 1974, AM J ANAT, V141, P537 CLEMENTSMERLINI M, 1960, J MORPHOL, V106, P337 COLEMAN R, 1968, GEN COMP ENDOCR, V10, P34 CORDIER AC, 1976, AM J ANAT, V146, P339 DAEMS WT, 1969, LYSOSOMES, V1, P64 EGEBERG J, 1965, Z ZELLFORSCH MIKROSK, V68, P102 ETKIN W, 1968, METAMORPHOSIS PROBLE, P313 FINSTAD J, 1964, J EXP MED, V120, P1151 FOX H, 1970, J EMBRYOL EXP MORPH, V24, P139 FOX H, 1973, Z ZELLFORSCH, V130, P371 FUJITA H, 1966, Z ZELLFORSCH MIKROSK, V73, P559 FUJITA H, 1968, GEN COMP ENDOCR, V11, P111 FUJITA H, 1969, Z ZELLFORSCH, V98, P525 FUJITA H, 1972, ARCH HISTOL JAPON, V34, P109 FUJITA H, 1975, ARCH HISTOL JPN, V37, P277 FUJITA H, 1975, INT REV CYTOL, V40, P197 GOOD RA, 1972, BIOL LAMPREYS, V2, P405 GORBMAN A, 1962, TXB COMP ENDOCRINOLO HELMINEN HJ, 1971, J ULTRASTRUCT RES, V36, P708 HENDERSON NE, 1971, GEN COMP ENDOCR, V16, P409 HILFER SR, 1964, J MORPHOL, V115, P135 HILFER SR, 1977, J CELL BIOL, V75, P446 HOHEISEL G, 1969, GEGENBAURS MORPHOL J, V114, P204 HOHEISEL G, 1970, MORPHOL JB, V114, P337 HOURDRY J, 1969, Z ZELLFORSCH MIKR AN, V101, P527 JAMIESON JD, 1977, INT CELL BIOL, P308 KLINCK GH, 1970, LAB INVEST, V22, P2 KRAENVZEL F, 1933, ARCH BIOL LIEGE, V44, P469 KRUPP PP, 1977, ANAT REC, V187, P495 LANZING WJR, 1959, STUDIES RIVER LAMPRE LEACH JW, 1939, J MORPHOL, V65, P549 LUFT JH, 1961, J BIOPHYS BIOCH CYTO, V9, P409 MANASEK FJ, 1969, J EMBRYOL EXP MORPH, V21, P271 MARINE D, 1913, J EXP MED, V17, P379 MILLONIG G, 1961, J APPL PHYS, V32, P1637 MOLLENHAUER HH, 1964, STAIN TECHNOL, V39, P111 MORRIS GP, 1979, CELL TISSUE RES, V196, P449 NEUENSCHWANDER P, 1972, Z ZELLFORSCH MIKROSK, V130, P553 NEVE P, 1965, J MICROSC-PARIS, V4, P811 NICKERSON PA, 1970, J CELL BIOL, V47, P277 NOVIKOFF AB, 1976, CELLS ORGANELLES NUNEZ EA, 1967, J CELL BIOL, V2, P404 NUNEZ EA, 1976, ANAT REC, V184, P133 OLIN P, 1970, ENDOCRINOLOGY, V87, P1000 OLIVEREAU M, 1952, ARCH ANAT MICROSC EX, V41, P1 OOI EC, 1976, CAN J ZOOL, V54, P1449 OOI EC, 1979, AM J ANAT, V154, P57 PEEK WD, 1979, J MORPHOL, V160, P143 PIPAN N, 1976, CYTOBIOLOGIE, V13, P435 POLLARD B, 1966, PHYLOGENY IMMUNITY, P88 REMY L, 1977, J ULTRASTRUCT RES, V61, P243 REYNOLDS ES, 1963, J CELL BIOL, V17, P208 ROITT IM, 1971, ESSENTIAL IMMUNOLOGY, P211 ROMERT P, 1973, Z ANAT ENTWICKLUNGS, V139, P319 SELJELID R, 1967, J ULTRASTRUCT RES, V17, P195 SELJELID R, 1967, J ULTRASTRUCT RES, V17, P401 SETOGUTI T, 1973, Z ZELLFORSCH MIKROSK, V137, P195 SHEPARD TH, 1967, J CLIN ENDOCR METAB, V27, P945 SHIVELY JN, 1969, AM J VET RES, V30, P219 STERBA G, 1953, WISS Z F SCHILLER MN, V3, P1 STERBA G, 1953, WISS Z F SCHILLER MN, V3, P239 STERBA G, 1961, INT REV GES HYDROBIO, V46, P105 STERBA G, 1962, HDB BINNENFISCHEREI, V3, P263 THIELE J, 1976, CELL TISSUE RES, V168, P133 WATSON ML, 1958, J BIOPHYS BIOCHEM CY, V4, P475 WESSELLS NK, 1971, SCIENCE, V171, P135 WETZEL BK, 1969, ENDOCRINOLOGY, V84, P563 WISSIG SL, 1960, J BIOPHYS BIOCHEM CY, V7, P419 WOLLMAN SH, 1969, LYSOSOMES BIOLOGY PA, V2, P483 WRIGHT G, 1978, AM J ANAT, V152, P263 WRIGHT GM, 1976, GEN COMP ENDOCR, V30, P243 WRIGHT GM, 1977, J EXP ZOOL, V202, P27 WRIGHT GM, 1978, THESIS U TORONTO, P70 YOUSON JH, 1977, CAN J ZOOL, V55, P469 YOUSON JH, 1979, CAN J ZOOL, V57, P1808 YOUSON JH, 1980, CAN J FISH AQUAT SCI, V37; NR: 80; TC: 21; J9: J MORPHOL; PG: 27; GA: KT943Source type: Electronic(1
The economic and fiscal impacts of Hurricane Sandy in New Jersey, a macroeconomic analysis
No full textThis report estimates the macroeconomic and fiscal impacts of Hurricane Sandy on the economy of New Jersey using the R/ECON™ forecasting model of the state’s economy. The model consists of more than 250 quarterly time-series equations and 30 employment sectors.The analysis takes into account both the economic losses resulting from the hurricane and the offsetting positive economic impacts associated with recovery and reconstruction spending in the months and years following the storm.However, the estimates of impacts depend upon the restoration expenditures actually being made. If the funds for these restoration and recovery expenditures are not made available, the offsetting positive impacts to the economy will not occur and the New Jersey economy will be significantly damaged. See Section 3 for estimates of the negative impacts if restoration expenditures are not made.This report was published as Issue Paper Number 34, January 2013, in Rutgers Regional Report
Mrs. J. H. Ammon letter to Frances Casement, December 24, 1884
No full textLetter from Josephine M. (Mrs. J. H.) Ammon of Cleveland to Frances Casement, December 24, 1884. Ammon expresses her thanks to Casement and her fellow suffrage supporters in Painesville, Ohio, for recently hosting Ammon and other women from Cleveland. She discusses an upcoming lecture to take place titled "Should Women Vote?" and explores options to combine efforts in the region with regard to public lectures.
This item comes from the Frances Jennings Casement Papers, a manuscript collection comprised of letters and association records related to the founding and leadership of the Ohio Woman Suffrage Association. Casement (1840-1928) was born in Painesville, Ohio, and graduated from Painesville Academy and Willoughby Female Seminary. Her father, Charles Casement, supported abolition and women's suffrage and encouraged Frances to be active in social causes. Frances Casement established the Painesville Equal Rights Association in 1883, and shortly after became involved in the Ohio Woman Suffrage Association, serving as its president from 1885 to 1888
Transforming growth factor β1 selectively regulates ornithine decarboxylase gene expression in malignant H‐ras transformed fibrosarcoma cell lines
No full textNegative growth regulators such as the transforming growth factor beta (TGF-beta) family appear to be important inhibitors in most tissue types. However, inhibition of DNA synthesis and cell proliferation is frequently lost during malignant transformation, and in some cases, tumor cell proliferation is actually stimulated by TGF-beta. The present study demonstrates a novel link between alterations in TGF-beta regulation during malignant conversion, and the expression of ornithine decarboxylase, a key rate-limiting activity in the biosynthesis of polyamines, and an enzyme that plays an important role in cell growth and differentiation. A panel of radiation and H-ras transformed mouse 10T 1/2 cell lines exhibiting increasing malignant potential was investigated for possible TGF-beta1 mediated changes in ornithine decarboxylase gene expression. Selective induction of gene expression was observed since only H-ras transformed cell lines with malignant potential exhibited marked elevations in ornithine decarboxylase message levels. Ornithine decarboxylase gene expression in nontransformed 10T 1/2 cells and cell lines capable of only benign tumor formation was unaffected by TGF-beta1 treatment. H-ras transformed cells were transfected with a plasmid placing the TGF-beta1 coding region under the control of a zinc sensitive metallothionein promoter. When these cells were cultured in the presence of zinc an elevation of TGF-beta1 mRNA was observed within 30 min. This increase in TGF-beta1 message closely coincided with an elevation in ornithine decarboxylase message, and preceded an induction of jun-B, an early response gene in cells sensitive to TGF-beta1 stimulation. Evidence for regulation of ornithine decarboxylase gene expression by TGF-beta1 at both transcription and posttranscription was found. Actinomycin D pretreatment of malignant cells prior to TGF-beta1 exposure prevented the increase in ornithine decarboxylase message. Marked differences in the rates of ornithine decarboxylase message decay were observed when cells treated with TGF-beta1 were compared to untreated controls, with the half-life of ornithine decarboxylase mRNA increasing from 2.5 h in untreated cells to 17.5 h in cells exposed to TGF-beta1. In addition, evidence was obtained for a cycloheximide sensitive regulator of ornithine decarboxylase gene expression, since the presence of this protein synthesis inhibitor increased the levels of ornithine decarboxylase message, and this effect was synergistically augmented by exposure of cells to cycloheximide and induction of TGF-beta1 gene expression together. These results show for the first time that TGF-beta1 can regulate ornithine decarboxylase expression in malignant H-ras transformed cells, and suggest a mechanism of growth factor stimulation of malignant cells, in which early alterations in the control of ornithine decarboxylase, gene expression are important. (C) 1993 Wiley-Liss, Inc.PT: J; CR: BRUNNER AM, 1989, J BIOL CHEM, V264, P13660 CHOY BK, 1989, BIOCHEM BIOPH RES CO, V162, P1417 EDWARDS DR, 1985, MOL CELL BIOL, V5, P3280 EGAN SE, 1987, MOL CELL BIOL, V7, P830 FELGNER PL, 1987, P NATL ACAD SCI USA, V84, P7413 FONG WF, 1976, BIOCHIM BIOPHYS ACTA, V428, P456 GENTRY LE, 1988, MOL CELL BIOL, V8, P4162 GOUGH NM, 1988, ANAL BIOCHEM, V173, P93 HAYASHI S, 1989, ORNITHINE DECARBOXYL HOLTTA E, 1986, J BIOL CHEM, V261, P9502 HOVIS JG, 1986, J BIOL CHEM, V261, P10380 HURTA RAR, 1990, BIOCHIM BIOPHYS ACTA, V1087, P165 HURTA RAR, 1991, J BIOL CHEM, V266, P24097 HURTA RAR, 1992, J CELL PHYSIOL, V152, P529 KAHANA C, 1984, P NATL ACAD SCI-BIOL, V81, P3645 KAHANA C, 1985, J BIOL CHEM, V260, P15390 KATZ A, 1987, MOL CELL BIOL, V7, P2641 KONTULA KK, 1984, P NATL ACAD SCI USA, V81, P731 LE AQ, 1992, J BIOL CHEM, V267, P1072 LEOF EB, 1986, P NATL ACAD SCI USA, V83, P2453 MCCLARTY GA, 1986, SOMAT CELL MOLEC GEN, V12, P121 MCCLARTY GA, 1987, BIOCHEMISTRY-US, V26, P8004 MCCLARTY GA, 1990, J BIOL CHEM, V265, P7539 MORRS DR, 1981, POLYAMINES BIOL MED, P3 MUKHERJEE R, 1987, J BIOL CHEM, V262, P13697 OLSON EN, 1986, MOL CELL BIOL, V6, P2792 PEGG AE, 1988, CANCER RES, V48, P759 PERSSON L, 1985, BIOCHEM BIOPH RES CO, V131, P239 PERTOVAARA L, 1989, MOL CELL BIOL, V9, P1255 PHILLIPS DR, 1986, BIOCHEMISTRY-US, V25, P7355 RAGHOW R, 1987, TRENDS BIOCHEM SCI, V12, P358 ROBERTS AB, 1990, HDB EXPT PHARM, V95, P419 SAMUEL SK, 1992, EMBO J, V11, P1599 SCHWARZ LC, 1988, CANCER RES, V48, P6999 SCHWARZ LC, 1990, GROWTH FACTORS, V3, P115 SERTICH GJ, 1987, BIOCHEM BIOPH RES CO, V143, P424 SEYFRIED CE, 1983, METHODS ENZYMOLOGY P, P373 SPORN MB, 1990, CELL REGUL, V1, P875 TABOR CW, 1984, ANNU REV BIOCHEM, V53, P749 TAKEHARA K, 1987, CELL, V49, P415 TAMM I, 1978, ADV VIRUS RES, V22, P187 WRIGHT JA, 1990, ANTICANCER RES, V10, P1247 WRIGHT JA, 1990, BIOCH CELL BIOL, V68, P1364; NR: 43; TC: 28; J9: J CELL PHYSIOL; PG: 8; GA: LP822Source type: Electronic(1
Control and Filtering for Discrete Linear Repetitive Processes with H infty and ell 2--ell infty Performance
No full textRepetitive processes are characterized by a series of sweeps, termed passes, through a set of dynamics defined over a finite duration known as the pass length. On each pass an output, termed the pass profile, is produced which acts as a forcing function on, and hence contributes to, the dynamics of the next pass profile. This can lead to oscillations which increase in amplitude in the pass to pass direction and cannot be controlled by standard control laws. Here we give new results on the design of physically based control laws for the sub-class of so-called discrete linear repetitive processes which arise in applications areas such as iterative learning control. The main contribution is to show how control law design can be undertaken within the framework of a general robust filtering problem with guaranteed levels of performance. In particular, we develop algorithms for the design of an H? and dynamic output feedback controller and filter which guarantees that the resulting controlled (filtering error) process, respectively, is stable along the pass and has prescribed disturbance attenuation performance as measured by and – norms
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