宇宙化学における炭素質隕石の有機化合物(<特集>地球における炭素の循環(続))

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This paper reviews prebiotic organic compounds in carbonaceous chondrites in order to understand the characteristics of organic compounds in the early stage of our solar system about 4-6 billion years ago. The contents include importance of carbonaceous chondrites as an primitive material in our solar system, stable carbon isotopic compositions, detailed information on various classes of organic compounds, such as amino acids, mono- and dicarboxylic acids, aliphatic and aromatic hydrocarbons, nucleic acid bases, and insoluble organic matter, and the origins of these organic compounds. These abiotic organic compounds must have existed also on the primitive earth where the life was formed as a consequence of chemical evolution involving these compounds. They are also important and common in organic geochemistry, although it deals with compounds produced mainly by biological activities followed by diagenesis of sediments on the earth.
1994-09-25