Abiotic synthesis of amino acids and imidazole by proton irradiation of simulated primitive earth atmospheres |
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| Authors: | Kensei Kobayashi Masahiko Tsuchiya Tairo Oshima Hiroshi Yanagawa |
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| Institution: | (1) Department of Physical Chemistry, Faculty of Engineering, Yokohama National University, 240 Hodogaya-ku, Yokohama, Japan;(2) Department of Life Science, Faculty of Science, Tokyo Institute of Technology, 227 Midori-ku, Yokohama, Japan;(3) Mitsubishi Kasei Institute of Life Sciences, 194 Minamiooya, Machida, Tokyo, Japan |
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| Abstract: | Proton irradiation of simulated primitive earth atmosphere was performed, and amino acids and imidazole were analyzed. A mixture of carbon monoxide and nitrogen over water was irradiated by high energy protons (3 MeV, 0.6 µA) generated by a Van de Graaff accelerator for 2–5 h. Various kinds of proteinous and non-proteinous amino acids were detected in the irradiation products. Imidazole present in the irradiation products was also detected by high-performance liquid chromatography and mass spectrometry. The present results suggest that compounds of biological importance such as amino acids could be synthesized from primitive earth atmosphere by radiation of cosmic rays and/or solar flare particles. |
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