JMDMT #653 Microfossils of Cyanobacteria in Carbonaceous Meteorites
The James M. DuPont Meteorite Collection - same order are found between the original distillate and a chromatographically separated hydrocarbon fraction of a solvent extract of the whole meteorite (Meinschein et al., 1962). 530 Annals New York Academy of Sciences distribution was made abiotically by Miller-Urey type reactions in the solar nebula. Such reactions are known to produce carbon chains of varying length, presumably by free radical reactions. The hydrocarbons in comets and the organic material in cosmic dust (Parkin et al., 1%2) may have been produced in this way. Meinschein (1961) has argued that such reactions would be highly nonselective, showing little preference among the billions of possible I.OOOr 100- X o . - -y N-A - V ~ \ / — ~ \ / \ / — '-- \ / -
Added: Nov 21, 2008; Author: h4ck3rm1k3; Duration: 1:9; Views: 7