宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究
Stereo chemical verifications of amino acids regarding organic cosmochemical and geochemical approaches were systematically performed. Representative results are as follows. At first, endo- and exogenous abiotic formations of bio-organic compounds were investigated. Among these, we clarified that th...
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日本分析化学会
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ftyokohamanuniv:oai:ynu.repo.nii.ac.jp:00004265 2023-07-02T03:33:27+02:00 宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 Studies of chemical evolution and stereo chemistry of amino acids in cosmic and planetary extreme environments 高野 淑識 2005 http://hdl.handle.net/10131/8370 https://ynu.repo.nii.ac.jp/?action=repository_uri&item_id=4265 https://ynu.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4265&item_no=1&attribute_id=20&file_no=1 ja jpn 日本分析化学会 http://ci.nii.ac.jp/naid/110002910031 https://ynu.repo.nii.ac.jp/?action=repository_uri&item_id=4265 http://hdl.handle.net/10131/8370 分析化学, 54(1), 101-102(2005) 05251931 AN00222633 https://ynu.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4265&item_no=1&attribute_id=20&file_no=1 Journal Article 2005 ftyokohamanuniv 2023-06-09T00:10:18Z Stereo chemical verifications of amino acids regarding organic cosmochemical and geochemical approaches were systematically performed. Representative results are as follows. At first, endo- and exogenous abiotic formations of bio-organic compounds were investigated. Among these, we clarified that the primary irradiation products were not free amino acid analogs, but were amino acid precursors having high molecular weight; both proteinous and non-proteinous amino acids were detected after acid-hydrolysis. Secondary, the emergence of an enantiomeric excess of chiral amino acids in meteorite was experimentally verified. The synthesized complex organics containing amino acid precursors from simple gas mixtures were irradiated with right (R-) or left (L-) continuous ultraviolet circularly polarized light (UV-CPL) obtained from synchrotron radiation (SR). Then, R-CPL preferentially photosynthesized D-alanine, and L-CPL yielded more L-alanine. Statistically significant enantiomeric excesses (%_D-%_L) of +0.44% and -0.65% were obtained by R-CPL and L-CPL, respectively. Thirdly, geological samples in terrestrial extreme environments, such as a semi-permafrost environment, subterranean hydrothermal systems, and deep-sea hydrothermal systems, were analyzed in terms of the concentration of amino acids, the chiral ratio and the enzymatic activities to search for new biospheres. The present findings are therefore strong evidence that those frontiers are previously unknown extreme environment biospheres extending the planetary habitable zone. Article in Journal/Newspaper permafrost YNU-R - Yokohama National University Repository |
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ftyokohamanuniv |
language |
Japanese |
description |
Stereo chemical verifications of amino acids regarding organic cosmochemical and geochemical approaches were systematically performed. Representative results are as follows. At first, endo- and exogenous abiotic formations of bio-organic compounds were investigated. Among these, we clarified that the primary irradiation products were not free amino acid analogs, but were amino acid precursors having high molecular weight; both proteinous and non-proteinous amino acids were detected after acid-hydrolysis. Secondary, the emergence of an enantiomeric excess of chiral amino acids in meteorite was experimentally verified. The synthesized complex organics containing amino acid precursors from simple gas mixtures were irradiated with right (R-) or left (L-) continuous ultraviolet circularly polarized light (UV-CPL) obtained from synchrotron radiation (SR). Then, R-CPL preferentially photosynthesized D-alanine, and L-CPL yielded more L-alanine. Statistically significant enantiomeric excesses (%_D-%_L) of +0.44% and -0.65% were obtained by R-CPL and L-CPL, respectively. Thirdly, geological samples in terrestrial extreme environments, such as a semi-permafrost environment, subterranean hydrothermal systems, and deep-sea hydrothermal systems, were analyzed in terms of the concentration of amino acids, the chiral ratio and the enzymatic activities to search for new biospheres. The present findings are therefore strong evidence that those frontiers are previously unknown extreme environment biospheres extending the planetary habitable zone. |
format |
Article in Journal/Newspaper |
author |
高野 淑識 |
spellingShingle |
高野 淑識 宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 |
author_facet |
高野 淑識 |
author_sort |
高野 淑識 |
title |
宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 |
title_short |
宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 |
title_full |
宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 |
title_fullStr |
宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 |
title_full_unstemmed |
宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 |
title_sort |
宇宙及び惑星極限環境下での有機物質進化とアミノ酸立体化学に関する研究 |
publisher |
日本分析化学会 |
publishDate |
2005 |
url |
http://hdl.handle.net/10131/8370 https://ynu.repo.nii.ac.jp/?action=repository_uri&item_id=4265 https://ynu.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4265&item_no=1&attribute_id=20&file_no=1 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
http://ci.nii.ac.jp/naid/110002910031 https://ynu.repo.nii.ac.jp/?action=repository_uri&item_id=4265 http://hdl.handle.net/10131/8370 分析化学, 54(1), 101-102(2005) 05251931 AN00222633 https://ynu.repo.nii.ac.jp/?action=repository_action_common_download&item_id=4265&item_no=1&attribute_id=20&file_no=1 |
_version_ |
1770273409515651072 |