Researcher Database

OBA YASUHIRO
Institute of Low Temperature Science Frontier Ice and Snow Science
Assistant Professor

Researcher Profile and Settings

Affiliation

  • Institute of Low Temperature Science Frontier Ice and Snow Science

Job Title

    Assistant Professor

E-mail

  • oba@lowtem.hokudai.ac.jp

URL

Research Areas

  • Earth and planetary science / Geochemistry/Astrochemistry

Research Activities

Published Papers

Conference Activities & Talks

  • Role of quantum tunneling for the formation of H2O by reaction of H2 with OH on interstellar grains  [Not invited]
    Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A.Kouchi
    247th ACS Chemistry & Materials for Energy  2014/03  Dallas, USA
  • Isotope Effect in the Formation of Solid Water by Surface Reactions at 10 K  [Not invited]
    Y. Oba, N. Watanabe, A Kouchi
    Goldschmidt2013  2013/08  Florence, Italy
  • Experimental study of quantum-tunneling surface reaction OH + H2 → H2O+ H at 10 K  [Invited]
    Y. Oba, N. Watanabe, T. Hama, H. Hidaka., K. Kuwahata, A. Kouchi
    29th Symposium on Chemical Kinetics and Dynamics  2013/06  Tohoku Univ.
  • Formation of H2O ice on cold interstellar grains: reaction kinetics and the structure of ice  [Invited]
    Y. Oba
    Workshop on Ice and Water Films  2013/05  Seoul National Univ.
  • Hydrogen isotopic fractionation of solid methylamine through atomic-surface reactions at 10K  [Not invited]
    Y.Oba,T. Chigai, N. Watanabe, A. Kouchi ,Y. Osamura
    First Workshop on Experimental Laboratory Astrophysics  2013/02  Kauai, Hawaii
  • Laboratory study of solid H2O formation trhough quantum tunneling reaction OH + H2 at 10 K  [Not invited]
    Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A. Kouchi
    Dynamical Phenomena at Surfaces: The Role of Complexity  2012/11  Leiden, Netherland
  • Water formation by OH + H2 on grain surfaces at 10 K: large isotope effects by quantum tunneling  [Not invited]
    Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A. Kouchi
    Workshop on Interstellar Matter 2012  2012/10
  • Deuterium fractionation of methylamine through atomic grain-surface reactions at low temperatures: implication for the possible D/H ratio in molecular clouds  [Not invited]
    Y. Oba, T. Chigai, N. Watanabe, A. Kouchi
    Workshop on Interstellar Matter 2012  2012/10  Sapporo, Hokkaido, Japan
  • Formation of solid H2O through surface reactions of H2 with OH radicals produced by microwave-induced H2O plasma  [Not invited]
    Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A. Kouchi
    Gordon Research Conference, Radiation Chemisty  2012/07  Andover, NH, USA
  • Surface chemical reactions to the formation of solid H2O and its isotopologues on interstellar grains at 10 K  [Not invited]
    Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A. Kouchi
    Asteroids, Comets, Meteors (ACM) 2012  2012/05  Niigata, JAPAN
  • Hydrogen isotope substitution of solid methylamine (CH3NH2) on a low-temperature surface  [Not invited]
    Y. Oba, N. Watanabe, T. Hama, K. Kuwahata, H. Hidaka, A. Kouchi
    Asteroids, Comets, Meteors (ACM) 2012  2012/05  Niigata, JAPAN
  • Low-temperature surface reactions of non-energetic OH radicals of astrophysical interest  [Not invited]
    Y. Oba, N. Watanabe, T. Hama, A. Kouchi, V. Pirronello
    SASP 2012  2012/01  Alpe d'Huez, France
  • 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  [Not invited]
    Y. Oba, N. Watanabe, A. Kouchi
    MATRIX 2011  2011/07  UBC, Vancouver, Canada
  • Sequential hydrogenation of molecular oxygen on cold surfaces: reaction kinetics and structure of formed H2O ice  [Not invited]
    Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, A. Kouchi
    IAU symposium 280, The Molecular Universe  2011/05  Toledo, Spain
  • Neutral radical-molecule reactions CO + OH on cold interstellar ices  [Not invited]
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
    IAU symposium 280, The Molecular Universe  2011/05  Toledo, Spain
  • Experimental studies on surface reactions of CO molecules with cold OH radicals at 10-40 K  [Not invited]
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
    Pacifichem 2010  2010/12  Honolulu, Hawaii, USA
  • Structure of H2O ice formed by surface reactions of oxygen molecules with hydrogen atoms at low temperatures  [Invited]
    Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, A. Kouchi
    12th International Conference on the Physics and Chemistry of Ice  2010/09  Sapporo, Hokkaido,Japan
  • Formation of CO2 and H2CO3 through non-energetic surface reactions at low temperatures  [Not invited]
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
    Workshop on Interstellar Matter 2010  2010/09  Sapporo, Hokkaido,Japan
  • Formation of compact amorphous water ice by surface atomic reactions at low temperatures  [Invited]
    A. Kouchi, Y. Oba, N. Miyahchi, H. Hidaka, T. Chigai, N. Watanabe
    2010 Western Pacific Geophysics Meeting  2010/06  Taipei, Taiwan
  • Surface reactions of CO molecules with OH radicals at low temperatures  [Not invited]
    Y. Oba, N. Watanabe, A. Kouchi, T. Hama, V. Pirronello
    2010 Western Pacific Geophysics Meeting  2010/06  Taipei, Taiwan
  • Surface reactions of hydrogen atoms with oxygen molecules at low temperatures: A potential route for the H2O formation in space  [Not invited]
    Y. Oba, N. Miyauchi, H. Hidaka, T. Chigai, N. Watanabe, A. Kouchi
    Horiba-ISSP International Symposium on "Hydrogen and water in condensed matter physics"  2009/10  Chiba, Japan
  • Formation of compact amorphous H2O ice by a reaction of hydrogen atoms with oxygen molecules at low temperatures  [Not invited]
    Y. Oba, N. Miyauchi, T. Chigai, H. Hidaka, N. Watanabe, A. Kouchi
    Gordon Research Conferences, Matrix-Isolated Species, Physics & Chemistry Of  2009/07  Magdalen College, Oxford, UK
  • Formation of interstellar ice by low temperature surface atomic reactions  [Not invited]
    A. Kouchi, Y. Oba, N. Miyahchi, H. Hidaka, N. Watanabe
    CRYO2009  2009/07  Sapporo,Hokkaido,Japan
  • Effective formation of H2O by the H-addition to solid O2 on amorphous D2O ice  [Not invited]
    Y. Oba, N. Miyauchi, T. Chigai, H. Hidaka, N. Watanabe, A. Kouchi
    Workshop on Interstellar Matter 2008  2008/09  Sapporo, Hokkaido,Japan
  • Incorporation of hydrous oxygen into insoluble organic matter (IOM) of Murchison  [Not invited]
    Y. Oba, H. Naraoka
    71th Annual Meeting of the Meteoritical Society  2008/07  Matsue, Shimane,Japan
  • Isotopic variation of macromolecular organic matter from CM chondrites during hydrous pyrolysis  [Not invited]
    Y. Oba, H. Naraoka
    31th Symposium on Antarctic Meteorites  2007/06  Tokyo, Japan
  • Carbon and hydrogen isotopic fractionations of organic compounds during UV degradation  [Not invited]
    Y. Oba, H. Naraoka
    16th Annual V. M. Goldschmidt Conference  2006/08  Melbourne, Australia
  • Intramolecular carbon isotopic distribution of macromolecular organic matter in carbonaceous chondrites (CM)  [Not invited]
    Y. Oba, H. Naraoka
    68th Annual Meeting of the Meteoritical Society  2005/09  Gatlinburg, TN, USA
  • Carbon and hydrogen isotopic compositions of acetic acid derived from macromolecular organic matter in the Murchison  [Not invited]
    Y. Oba, H. Naraoka
    29th Symposium on Antarctic Meteorites  2005/06  Tokyo, Japan
  • A different behavior of hydrogen isotope exchange between two PAH isomers (fluoranthen and pyrene)  [Not invited]
    Y. Oba, H. Naraoka
    13th Annual V. M. Goldschmidt Conference  2003/09  Kurashiki, Okayama, Japan

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