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YASUHIRO OBA
YASUHIRO OBA
Institute of Low Temperature Science, Hokkaido University
Adresse e-mail validée de lowtem.hokudai.ac.jp
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Formation of compact amorphous H2O ice by codeposition of hydrogen atoms with oxygen molecules on grain surfaces
Y Oba, N Miyauchi, H Hidaka, T Chigai, N Watanabe, A Kouchi
The Astrophysical Journal 701 (1), 464, 2009
1452009
Water formation through a quantum tunneling surface reaction, OH+ H2, at 10 K
Y Oba, N Watanabe, T Hama, K Kuwahata, H Hidaka, A Kouchi
The Astrophysical Journal 749 (1), 67, 2012
1222012
Experimental study of CO2 formation by surface reactions of non-energetic OH radicals with CO molecules
Y Oba, N Watanabe, A Kouchi, T Hama, V Pirronello
The Astrophysical Journal Letters 712 (2), L174, 2010
1172010
Nucleobase synthesis in interstellar ices
Y Oba, Y Takano, H Naraoka, N Watanabe, A Kouchi
Nature communications 10 (1), 4413, 2019
982019
Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu
H Naraoka, Y Takano, JP Dworkin, Y Oba, K Hamase, A Furusho, ...
Science 379 (6634), eabn9033, 2023
812023
Identifying the wide diversity of extraterrestrial purine and pyrimidine nucleobases in carbonaceous meteorites
Y Oba, Y Takano, Y Furukawa, T Koga, DP Glavin, JP Dworkin, ...
Nature communications 13 (1), 2008, 2022
812022
An infrared measurement of chemical desorption from interstellar ice analogues
Y Oba, T Tomaru, T Lamberts, A Kouchi, N Watanabe
Nature Astronomy 2 (3), 228-232, 2018
702018
Formation of carbonic acid (H2CO3) by surface reactions of non-energetic OH radicals with CO molecules at low temperatures
Y Oba, N Watanabe, A Kouchi, T Hama, V Pirronello
The Astrophysical Journal 722 (2), 1598, 2010
642010
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
SR Parker, CH Gammons, SR Poulson, MD DeGrandpre, CL Weyer, ...
Chemical Geology 269 (1-2), 22-32, 2010
542010
Experimental studies of surface reactions among OH radicals that yield H2O and CO2 at 40–60 K
Y Oba, N Watanabe, A Kouchi, T Hama, V Pirronello
Physical Chemistry Chemical Physics 13 (35), 15792-15797, 2011
512011
Extraterrestrial hexamethylenetetramine in meteorites—a precursor of prebiotic chemistry in the inner solar system
Y Oba, Y Takano, H Naraoka, Y Furukawa, DP Glavin, JP Dworkin, ...
Nature communications 11 (1), 6243, 2020
392020
Elemental and isotope behavior of macromolecular organic matter from CM chondrites during hydrous pyrolysis
Y Oba, H Naraoka
Meteoritics & Planetary Science 44 (7), 943-953, 2009
392009
Carbon isotopic composition of acetic acid generated by hydrous pyrolysis of macromolecular organic matter from the Murchison meteorite
Y Oba, H Naraoka
Meteoritics & Planetary Science 41 (8), 1175-1181, 2006
382006
Liquid-like behavior of UV-irradiated interstellar ice analog at low temperatures
S Tachibana, A Kouchi, T Hama, Y Oba, L Piani, I Sugawara, Y Endo, ...
Science advances 3 (9), eaao2538, 2017
362017
Deuterium Fractionation during Amino Acid Formation by Photolysis of Interstellar Ice Analogs Containing Deuterated Methanol
Y Oba, Y Takano, N Watanabe, A Kouchi
The Astrophysical Journal 827 (1), L18, 2016
352016
Reaction kinetics and isotope effect of water formation by the surface reaction of solid H 2 O 2 with H atoms at low temperatures
Y Oba, K Osaka, N Watanabe, T Chigai, A Kouchi
Faraday Discussions 168 (1), 185-204, 2014
352014
Direct Evidence for Ammonium Ion Formation in Ice Through Ultraviolet-Induced Acid–Base Reaction of NH3 With H3O+
ES Moon, H Kang, Y Oba, N Watanabe, A Kouchi
The Astrophysical Journal 713 (2), 906, 2010
352010
Transmission electron microscopy study of the morphology of ices composed of H2O, CO2, and CO on refractory grains
A Kouchi, M Tsuge, T Hama, Y Oba, S Okuzumi, S Sirono, M Momose, ...
The Astrophysical Journal 918 (2), 45, 2021
342021
FAUST I. The hot corino at the heart of the prototypical Class I protostar L1551 IRS5
E Bianchi, CJ Chandler, C Ceccarelli, C Codella, N Sakai, ...
Monthly Notices of the Royal Astronomical Society: Letters 498 (1), L87-L92, 2020
312020
Oxygen isotope fractionation of dissolved oxygen during abiological reduction by aqueous sulfide
Y Oba, SR Poulson
Chemical Geology 268 (3-4), 226-232, 2009
312009
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