@inproceedings{oai:jaxa.repo.nii.ac.jp:00020528,
 author = {山口, 善光 and 中澤, 清 and 榎森, 啓元 and Yamaguchi, Yoshimitsu and Nakazawa, Kiyoshi and Emori, Hiroyuki},
 book = {第38回月・惑星シンポジウム, Proceedings of the 38th ISAS Lunar and Planetary Symposium},
 month = {Mar},
 note = {Amino acids are one of the essential substances for terrestrial lives. We can point out two interesting and important properties on amino acids in terrestrial lives: first is that only approximately 20 kinds of amino acids are utilized in proteinic materials of terrestrial lives. Second is that the relative molar ratios between 20 amino acids are almost equal. In our present paper, paying attention to these facts, we make an attempt to specify physical and chemical properties of a primordial Earth environment. By assuming that two amino acids and appropriate inorganic elements are in chemical equilibrium, we can find the activity ratios (or activities) of inorganic elements under the condition of typical hydrothermal fluid. Our results suggest that the hydrothermal fluid environment must be in a reducing condition and the oxidizing elements like O2 or SO2 cannot contribute the equilibrium reactions., 資料番号: AA0063350013},
 pages = {48--51},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)},
 title = {Primordial Earth's environment suggested from equilibrium conditions among amino acids},
 year = {2006}
}