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Applied Physics Letters / Volume 74 / Issue 6 / APPLIED BIOPHYSICS

Appl. Phys. Lett. 74, 877 (1999); http://dx.doi.org/10.1063/1.123396 (3 pages)

Abiotic synthesis of amino acids by x-ray irradiation of simple inorganic gases

Jun-ichi Takahashi1, Teruo Hosokawa1, Hitomi Masuda2, Takeo Kaneko2, Kensei Kobayashi2, Takeshi Saito3, and Yuichi Utsumi4

1NTT System Electronics Laboratories, 3-1 Morinosato-wakamiya, Atsugi, Kanagawa 243-0198, Japan
2Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
3Institute for Cosmic Ray Research, The University of Tokyo, 3-2-1 Midori-cho, Tanashi, Tokyo 188-8502, Japan
4NTT Basic Research Laboratories, 3-1 Morinosato-wakamiya, Atsugi, Kanagawa 243-0198, Japan

(Received 1 September 1998; accepted 1 December 1998)

1–2 keV x-ray irradiation was carried out using a synchrotron radiation source on simulated primitive earth environment: a gas mixture of carbon monoxide, nitrogen, and water at atmospheric pressure. High-speed liquid chromatography of the hydrolyzed product solution detected amino acids. The amount of amino acids increased with the total energy absorbed by the gas molecules, and the antipodal optical isomers were generated in almost equal quantities. These imply that the precursors for amino acids were produced through x-ray-induced photolysis of inorganic molecules followed by recombination and polymerization into bio-organic compounds. These results suggest that prebiotic formation of amino acids is possible in primitive earth atmosphere by x ray as well as cosmic ray. © 1999 American Institute of Physics.

© 1999 American Institute of Physics

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KEYWORDS and PACS

Keywords

organic compounds, synchrotron radiation, radiolysis, chromatography, biological effects of X-rays, biomolecular effects of radiation

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.123396

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

    S. Miyakawa, H. Tamura, A. B. Sawaoka, and K. Kobayashi, Appl. Phys. Lett. 72, 990 (1998)APPLAB000072000008000990000001.

    A. Shibayama, T. Kitayama, T. Hayasaka, S. Ido, Y. Uno, T. Hosokawa, J. Nakata, K. Nishimura, and M. Nakajima, Rev. Sci. Instrum. 60, 1779 (1989)RSINAK000060000007001779000001.


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