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1842348422
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note
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standard]-1} × 1000, where H and L are the heavy and light isotopes, respectively, of each element.
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10
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1842318623
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note
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2 and H were then analyzed with 6-60-Nuclide and 3-60-HD-Nuclide mass spectrometers. The sulfate was extracted from each tube with hydrochloric acid and prepared for S isotopic analysis as in (6).
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12
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0023642209
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1842379409
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C. M. White, thesis, University of North Dakota, Grand Forks (1974).
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24
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1842382253
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note
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x are also observed in carbonaceous meteorites (25, 26).
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25
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0005797188
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2, heating was between 160° and 200°C for 5 min. No theory of how such reactive compounds could have survived in the meteorite for billions of years was offered. However, if the compounds were indigenous and of the same structure as the CS condensation products (and the identified interstellar molecules), they would seem to require a special carrier in the meteorite matrix, perhaps a carbon phase such as one produced from polymerization of CS or other reactive molecules (or both).
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31
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1842352379
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note
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We thank C. Moore (Arizona State University, Center for Meteorite Studies) for the sample of the Murchison meteorite; A. Tharpe for carbon isotope measurements; K. Klabunde and S. Charnley for helpful conversation; and V. Morris, N. Lerner, D. Des Marais, K. Zahnle, and L. Allamandola for comments on the manuscript. Supported by NASA grant NAGW 3551 and the Exobiology and Cosmochemistry Programs of NASA.
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