English

 

大場 康弘(OBA, Yasuhiro)

略歴

 

2007年,炭素質隕石中有機化合物の安定同位体組成を用いた起源解明に関する研究で博士 (理学)を取得。

2007-2008年 University of Nevada-Reno (USA)博士研究員「溶存酸素分子の消費に伴う酸素同位体分別に関する研究」

2008-2009年 北海道大学低温科学研究所 博士研究員「低温固体表面上における星間分子の化学進化に関する研究」

2009-2012年 日本学術振興会特別研究員(PD)「極低温星間塵表面原子反応によるアミノ酸の生成機構」

2012-2014年 北海道大学低温科学研究所 特任助教「星間分子雲における化学進化に関する研究」

2015-現在  北海道大学低温科学研究所宇宙物質科学グループ 助教「星間分子雲および惑星系の化学進化に関する研究」

Publications

Refereed Journals

2016

  • "Negative catalytic effect of water on the reactivity of hydrogen abstraction from the C-H bond of dimethyl ether by deuterium atoms through tunneling at low temperatures"
    Oba Y., Watanabe N., and Kouchi A.
    Chemical Physics Letters, 662, 14-18 (2016)
    *本論文はEditors Choiceに選定されました。.

  • "Hydrogen-deuterium substitution in solid ethanol by surface reactions at low temperatures"
    Oba Y., Osaka K., Chigai T., Kouchi A., and Watanabe N.
    Monthly Notices of Royal Astronomical Society, 462, 689-695 (2015)

  • "Deuterium fractionation during amino acid formation by photolysis of interstellar ice analogues containing deuterated methanol"
    Oba Y.,Takano Y., Watanabe N., and Kouchi A.
    Astrophysical Journal Letters, 827, L18 (7pp) (2016)

    2015

  • "Chiral Glycine Formation on Cold Interstellar Grains by Quantum Tunneling Hydrogen-Deuterium Substitution Reactions"
    Oba Y., Watanabe N., Osamura Y., and Kouchi A.
    Chemical Physics Letters, 634, 53-59 (2015)
    *本論文はEditors Choiceに選定されました。.
    *本論文は "The Conversation"で紹介されています。

    2014

  • “Hydrogen Isotopic Substitution of Solid Methylamine through Atomic Surface Reactions at Low Temperatures: A Potential Contribution to the D/H Ratio of Methylamine in Molecular Clouds”
    Oba Y., Chigai T., Osamura Y., Watanabe N., and Kouchi A.
    Meteoritics & Planetary Science, 46, 117-132 (2014)

  • “Reaction kinetics and isotope effect of water formation by the surface reaction of solid H2O2 with H atoms at low temperatures”
    Oba Y., Osaka K., Watanabe N., Chigai T., and Kouchi A.
    Faraday Discussions, 168, 185-204 (2014)

  • 2012

  • “星間分子雲での微粒子表面における水素の化学物理過程"
    渡部 直樹,香内 晃,羽馬 哲也,日高 宏,大場 康弘, 千貝 健
    表面科学, 33, 662-668 (2012)

  • “Octanol-water partition coefficients (Kow) vs. pH for fluorescent dye tracers (fluorescein, eosin Y), and implications for hydrologic tracer tests.”
    Oba Y., and Poulson S. R.
    Geochemical Journal, 46, 517-520 (2012)

  • “Water formation through a quantum tunneling surface reaction, OH + H2, at 10 K.”
    Oba Y., Watanabe N., Hama T., Kuwahata K., Hidaka H., and Kouchi A.
    The Astrophysical Journal, 749, 67(12pp) (2012)

    2011
    • “Experimental studies of surface reactions among OH radicals that yield H2O and CO2 at 40-60 K.”
      Oba Y., Watanabe N., Kouchi A., Hama T., and Pirronello V.
      Physical Chemistry Chemical Physics, 13, 15792-15797 (2011)

    • “星間分子雲における二酸化炭素生成に関する実験的研究”
      大場 康弘, 渡部 直樹, 香内 晃, 羽馬 哲也, ピロネロ バレリオ
      地球化学, 45, 213-226 (2011)

    • “炭素質隕石中有機化合物の安定同位体組成とその同位体分別プロセスに関する研究”
      大場 康弘
      Researches in Organic Geochemistry,27, 103-115 (2011)

    2010
    • “Formation of carbonic acid (H2CO3) by surface reactions of non-energetic OH radicals with CO molecules at low temperatures”
      Oba Y., Watanabe N., Kouchi A., Hama T., and Pirronello V.
      The Astrophysical Journal, 722, 1598-1606 (2010)

    • “Vertical carbon isotope change in acetate in a surface sediment from the northwestern Pacific Ocean”
      Kaneko, M., Oba Y., and Naraoka, H
      Researches in Organic Geochemistry, 26, 73-79 (2010)

    • “Direct evidence for ammonium ion formation in ice through ultraviolet-induced acid-base reaction of NH3 with H3O+
      Moon E.-S., Kang H., Oba Y., Watanabe N., and Kouchi A.
      The Astrophysical Journal, 713, 906-911 (2010)

    • “Experimental study of CO2 formation by surface reactions of non-energetic OH radicals with CO molecules”
      Oba Y., Watanabe N., Kouchi A., Hama T., and Pirronello V.
      The Astrophysical Journal, 712, L174-L178 (2010)

    • “Diel behavior of stable isotopes of dissolved oxygen and dissolved inorganic carbon in rivers over a range of trophic conditions, and in a mesocosm experiment.”
      S. R. Parker, C. H. Gammons, S. R. Poulson, M. D. DeGrandpre, C. L. Weyer, M. G. Smith, J. N. Babcock, and Oba Y.
      Chemical Geology, 269, 22-32 (2010)

    2009
    • “Oxygen isotope fractionation of dissolved oxygen during abiological reduction by aqueous sulfide”
      Oba Y., and Poulson S.R.
      Chemical Geology, 268, 226-232 (2009)

    • “Elemental and isotope behavior of macromolecular organic matter from CM chondrites during hydrous pyrolysis”
      Oba Y., and Naraoka H.
      Meteoritics and Planetary Science, 44, 943-953 (2009)

    • “Formation of compact amorphous H2O ice by codeposition of hydrogen atoms with oxygen molecules on grain surfaces”
      Oba Y., Miyauchi N., Chigai T., Hidaka H., Watanabe N., and Kouchi A.
      The Astrophysical Journal, 701, 464-470 (2009)

    • “Oxygen isotope fractionation of dissolved oxygen during reduction by ferrous iron”
      Oba Y., and Poulson S.R.
      Geochimica et Cosmochimica Acta, 73, 13-24 (2009)
    • 「極低温星間塵表面原子反応による水分子生成」
      大場 康弘,宮内 直弥,千貝 健,日高 宏,渡部 直樹,香内 晃
      地球化学, 第43巻, 117-131 (2009)

    2008
    • “Carbon and hydrogen isotopic fractionation of low molecular weight organic compounds during ultraviolet degradation”
      Oba Y., and Naraoka H.
      Organic Geochemistry, 35, 501-509 (2008)

    • “ガスクロマトグラフ/同位体比質量分析計による分子レベル安定同位体比分析法”
      力石 嘉人, 大場 康弘
      Researches in Organic Geochemistry, 23/24, 99-122 (2008)
    2007

    • “Carbon and hydrogen isotope fractionation of acetic acid during degradation by ultraviolet light”
      Oba Y., and Naraoka H.
      Geochemical Journal, 41, 103-110 (2007)

    2006
    • “Site-specific carbon isotope analysis of aromatic carboxylic acids by elemental analysis-pyrolysis-isotope ratio mass spectrometry”
      Oba Y., and Naraoka H.
      Rapid Communications in Mass Spectrometry, 20, 3649-3653 (2006)

    • “Carbon isotopic composition of acetic acid generated by hydrous pyrolysis of macromolecular organic matter from the Murchison meteorite”
      Oba Y., and Naraoka H.
      Meteoritics and Planetary Science, 41, 1175-1181 (2006)

    2003
    • “A different behavior of hydrogen isotope exchange in aqueous solutions between two PAH isomers (fluoranthene and pyrene)”
      Oba Y., and Naraoka H.
      Researches in Organic Geochemistry, 18, 29-35 (2003)

    国際会議プロシーディングス

    • V. Pirronello, M. Accolla, T. Hama, H. Hidaka, A. Kouchi, G. Manico, Y. Oba, and N. Watanabe
      “Laboratory investigations of physico-chemical processes occurring in icy mantles on interstellar dust grains”
      Physics and Chemistry of ice 2010, pp 361-368, Hokkaido University press (2011)
    • Y. Oba, N. Miyauchi, T. Chigai, H. Hidaka, N. Watanabe, and A. Kouchi
      “Formation of H2O ice through the surface reaction O2 + H at low temperatures: Reaction kinetics and structure of the ice”
      Physics and Chemistry of ice 2010, pp 369-378, Hokkaido University press (2011)
    • A. Kouchi, N. Watanabe, H. Hidaka, N. Miyauchi, Oba Y., and T. Chigai,
      “Formation of amorphous H2O ice from the reactions of cold H atoms with solid O2 at 10K”
      Cosmic Dust-Near & Far, ASP Conference Series 414, 338, (2009)
    • N. Watanabe, A. Kouchi, H. Hidaka, Oba Y., and N. Miyauchi,
      “Nonenergetic reactions between atomic hydrogen and molecules on interstellar grain surfaces”
      XXVI International Conference on Photonic, Electronic and Atomic Collisions, Journal of Physics: Conference Series, 194, 012044, (2009)

    国際会議発表



      2016
    • Y. Oba, N. Watanabe, and A. Kouchi “Negative catalytic effect of amorphous solid water on the surface reaction of dimethyl ether with deuterium atoms at 15 K”Chemistry and Physics at Low Temperatures (CPLT) 2016, Biarritz, France, 3rd-8th July (2016)
    • Y. Oba (Invited), N. Watanabe, and A. Kouchi “Formation of chiral glycine by surface reactions of normal glycine with deuterium atoms at 10 K”Astrophysical Ices in the Lab (AILab), Madrid, Spain, 7-8th March (2016)
        2015
      • Y. Oba(Invited), “Formation and deuterium fractionation of water by low-temperature surface reactions in molecular clouds”Center for Astrochemical Studies Seminar, Munich, Germany, 13th October (2015)
      • Y. Oba, N. Watanabe, and A. Kouchi “Deuteration of interstellar glycine on low-temperature surfaces: A possible route to the formation of chiral molecules in dense molecular clouds”From clouds to protoplanetary disks: the astrochemical link, Berlin, Germany, 5th October (2015)
      • Y. Oba, N. Watanabe, and A. Kouchi “Formation of deuterated "chiral" glycine by low-temperature surface reactions via quantum tunneling”Goldschmidt2015, Prague, Czech Republic, 16-21th August (2015)
      • Y. Oba, N. Watanabe, and A. Kouchi “Mechanism for the prebiotic emergence of "chirality": Chiral glycine formation on interstellar grains”Astrobiology Science conference 2015, Chicago, USA, 15-19th June (2015)
      • Y. Oba, N. Watanabe, and A. Kouchi “Glycine becomes chiral by grain-surface reactions at low temperatures”COST Action Our Astrochemical History CM1401, Prague, Czech Republic, 26-29th May (2015)
          2014
        • Y. Oba, K. Osaka, N. Watanabe, T. Chigai, and A. Kouchi “Reaction kinetics and isotope effect of water formation by the surface reaction of solid H2O2 with H atoms at low temperatures”Faraday Discussions 168, Leiden, The Netherlands, 6-9th April (2014)
        • Y. Oba, N. Watanabe, and A. Kouchi “Role of quantum tunneling for the formation of H2O by reaction of H2 with OH on interstellar grains” 247th ACS National Meeting,Dallas, Texas, USA, 16-20th March (2014)
            2013
          • Y. Oba, N. Watanabe, and A. Kouchi “Isotope effect in the formation of solid water by surfac reactions at low temperatures” Goldschmidt Conference 2013, Florence, Italy, 25-29th August (2013)
          • Y. Oba, A. Kouchi, H. Hidaka, T. Hama, and N. Watanabe(Invited) “Formation of H2O ice on cold interstellar grains: Reaction kinetics and the structure of ice” Workshop on Ice and Water Films, Seoul, Korea, 6-8 May (2013)
          • Y. Oba, T. Chigai, N. Watanabe, A. Kouchi, and Y. Osamura “Hydrogen isotopic fractionation of solid methylamine through atomic-surface reactions at 10 K.”, First Workshop on 'Experimental Laboratory Astrophysics, Poipu, Kauai, HI, USA 25-27 October (2013)

          2012
          • Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, and A. Kouchi “Laboratory study of solid H2O formation through quantum tunneling reaction OH + H2 at 10 K.”, Dynamical Phenomena at Surfaces: The Role of Complexity, Leiden, Netherland, 26-30 November (2012)
          • Y. Oba, T. Chigai, N. Watanabe, and A. Kouchi “Deuterium fractionation of methylamine through atomic grain-surface reactions at low temperatures: implication for the possible D/H ratio in molecular clouds”, Workshop for Interstellar Matter 2012, Sapporo, Hokkaido, Japan, 17-19 October (2012)
          • Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, and A. Kouchi “Water formation by OH + H2 on grain surfaces at 10 K: large isotope effects by quantum tunneling.”, Workshop for Interstellar Matter 2012, Sapporo, Hokkaido, Japan, 17-19 October (2012)
          • Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, and A. Kouchi “Formation of solid H2O through surface reactions of H2 with OH radicals produced by microwave-induced H2O plasma.”, Gordon Research Conference, Radiation Chemisty, Andover, NH, USA, 29 July-3 August, (2012)
          • Y. Oba, N. Watanabe, and A. Kouchi “Hydrogen isotope substitution of solid methylamine (CH3NH2) on a low-temperature surface”, Asteroids, Comets, Meteors (ACM) 2012, Niigata, JAPAN, 16-20 May, (2012)
          • Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, and A. Kouchi “Surface chemical reactions to the formation of solid H2O and its isotopologues on interstellar grains at 10 K”, Asteroids, Comets, Meteors (ACM) 2012, Niigata, JAPAN, 16-20 May, (2012)
          • Y. Oba, N. Watanabe, T. Hama, A. Kouchi, and V. Pirronello “Low-temperature surface reactions of non-energetic OH radicals of astrophysical interest”, SASP 2012, Alpe d'Huez, France, 22-26 January, (2012)
          2011
          • Y. Oba, N. Watanabe, and A. Kouchi “Isotope effect on the formation of H2O isotopologues by quantum tunneling reactions of H2/HD/D2 with non-energetic OH/OD radicals at low temperatures.”, MATRIX 2011, UBC, Vancouver, Canada, 10-15 July, (2011)
          • Y. Oba, N. Watanabe, A. Kouchi, T. Hama, and V. Pirronello “Neutral radical-molecule reactions CO + OH on cold interstellar ices”, IAU symposium 280, The Molecular Universe, Toledo, Spain, 30 May-June 3, (2011)
          • Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, and A. Kouchi “Sequential hydrogenation of molecular oxygen on cold surfaces: reaction kinetics and structure of formed H2O ice.”, IAU symposium 280, The Molecular Universe, Toledo, Spain, 30 May-June 3, (2011)
          2010
          • Y. Oba, N. Watanabe, A. Kouchi, T. Hama, and V. Pirronello “Experimental studies on surface reactions of CO molecules with cold OH radicals at 10-40 K”, Pacifichem 2010, Honolulu, Hawaii, USA, 15-20 December, (2010)
          • Y. Oba, N. Watanabe, A. Kouchi, T. Hama, and V. Pirronello “Formation of CO2 and H2CO3 through non-energetic surface reactions at low temperatures”, Workshop on Interstellar Matter 2010, Hokkaido Univ., 13-15 September, (2010)
          • Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, and A. Kouchi (invited),“Structure of H2O ice formed by surface reactions of oxygen molecules with hydrogen atoms at low temperatures”, 12th International Conference on the Physics and Chemistry of Ice, Hokkaido Univ., 5-10 September, (2010)
          • Y. Oba, N. Watanabe, A. Kouchi, T. Hama, and V. Pirronello “Surface reactions of CO molecules with OH radicals at low temperatures”, 2010 Western Pacific Geophysics Meeting, Taipei, Taiwan, 22-25 June, (2010)
          • A. Kouchi, Y. Oba, N. Miyahchi, H. Hidaka, T. Chigai, and N. Watanabe (invited; talk given by Y. Oba), “Formation of compact amorphous water ice by surface atomic reactions at low temperatures”, 2010 Western Pacific Geophysics Meeting, Taipei, Taiwan, 22-25 June, (2010)
          2009
          • A. Kouchi, Y. Oba, N. Miyahchi, H. Hidaka, and N. Watanabe “Formation of interstellar ice by low temperature surface atomic reactions”, CRYO2009, Hokkaido Univ., 19-23 July, (2009)
          • Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, and A. Kouchi “Surface reactions of hydrogen atoms with oxygen molecules at low temperatures: A potential route for the H2O formation in space”, Horiba-ISSP International Symposium on "Hydrogen and water in condensed matter physics", Chiba, 12-16 October, (2009)
          • Y. Oba, N. Miyauchi, T. Chigai, H. Hidaka, N. Watanabe, and A. Kouchi “Formation of compact amorphous H2O ice by a reaction of hydrogen atoms with oxygen molecules at low temperatures”, Gordon Research Conferences, Matrix-Isolated Species, Physics & Chemistry Of, Magdalen College, Oxford, UK, 19-24 July, (2009)
          2008
          • Y. Oba, N. Miyauchi, T. Chigai, H. Hidaka, N. Watanabe, and A. Kouchi “Effective formation of H2O by the H-addition to solid O2 on amorphous D2O ice”, Workshop for Interstellar Matter 2008, Hokkaido Univ., 4-6 September, (2008)
          • Y. Oba and H. Naraoka “Incorporation of hydrous oxygen into insoluble organic matter (IOM) of Murchison”, 71th Annual Meeting of the Meteoritical Society, Matsue, Shimane, July, (2008)
          Before 2007
          • Y. Oba and H. Naraoka “Isotopic variation of macromolecular organic matter from CM chondrites during hydrous pyrolysis”, 31th Symposium on Antarctic Meteorites , Tokyo, June, (2007)
          • Y. Oba and H. Naraoka “Carbon and hydrogen isotopic fractionations of organic compounds during UV degradation”, 16th Annual V. M. Goldschmidt Conference, Melbourne, Australia, August, (2006)
          • Y. Oba and H. Naraoka “Intramolecular carbon isotopic distribution of macromolecular organic matter in carbonaceous chondrites (CM)”, 68th Annual Meeting of the Meteoritical Society, Gatlinburg, TN, USA, September, (2005)
          • Y. Oba and H. Naraoka “Carbon and hydrogen isotopic compositions of acetic acid derived from macromolecular organic matter in the Murchison”, 29th Symposium on Antarctic Meteorites,Tokyo, June, (2005)
          • Y. Oba and H. Naraoka “A different behavior of hydrogen isotope exchange between two PAH isomers (fluoranthen and pyrene)”, 13th Annual V. M. Goldschmidt Conference, Kurashiki, Okayama, September, (2003)

          受賞歴

          • 2010年度日本有機地球化学会研究奨励賞(田口賞)「炭素質隕石中有機化合物の安定同位体組成とその同位体分別プロセスに関する研究」