Cosmo- and Geochemistry by Boschke F.L.

By Boschke F.L.

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Chandler, J. C. and Clarke, R. : Nature 236, 155-158 (1972). Briggs, M. : Nature 197, 1290 (1963). Broten, N. , Avery, L. , MacLeod, J. M. and Kroto, H. : Astrophys. J. 223, LI05-L107 0978). Bunch, T. E. and Chang, S. : Geochim. Cosmochim. Acta 44, 1543-1577 (1980). Cain, D. , Weitkamp, A. W. : Ind. Eng. Chem. 45, 359 (1953). : Chemical Evolution, Clarendon Press, Oxford, Ch. 4-6 (1969). Cameron, A. G. : Icarus 1, 13-69 0962). Cameron, A. G. : In: Interstellar Dust and Related Topics (J. M. Greenberg and H.

3), if interpreted as an equilibrium fractionation, suggests lower temperatures, but it may actually be due to reactions with D-rich ions). More recently, Lewis and Prinn (1980) have systematically examined the reduction kinetics of CO and N 2 in the solar nebula. Taking into account gas-phase reactions as well as surface-catalyzed reactions (for the rather inefficient catalysts present above 400 K), they conclude that reaction rates were so slow relative to the rates of radial mixing or nebular evolution that no more than 1 ~o of the N 2 and CO would have been reduced to N H 3 and CH 4 over the lifetime of the nebula.

And Kaplan, I. R. : Science 167, 1367-I370 (1970). Snell, R. L. and Wootten, A. : Astrophys. J. 228, 748-754 (1979). Srinivasan, B. and Anders, E. : Science 201, 51-56 (1978). Stephen-Sherwood, E. and Orr, J. : Space Life Sci. 4, 5-31 (1973). Stoks, P. G. and Schwartz, A. W. : Nature 282, 709-710 (1979). Stoks, P. G. and Schwartz, A. : Geochim. Cosmochim. Acta 44, 563-569 (1981). Studier, M. , Hayatsu, R. : Enrico Fermi Institute preprint No. 65-115, 19 pages (1965 a). Studier, M. , Hayatsu, R.

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