Eklenme: Nov 21, 2008
Kimden: h4ck3rm1k3
Süre: 1:3
The James M. DuPont Meteorite Collection - were suggestive of cytosine, a building block of nucleic acids which are essential components of all living cells. Briggs'''' reported evidence of purines and imidazoles in the Orgueil, Murray, and Mokoia meteor- ites. Detailed analyses of the amino acids, amino sugars, and sugars in the Bruder- heim chondrite and the Murray carbonaceous chondrite have been run by Degens and Bajor."'' They determined the quantities of 20 amino acids, 3 sugars, and 2 amino sugars as well as the presence of cytosine, uracil, and/or hypoxanthine in the 2 samples.'' "After complete extraction of all hydrolyz- able matter in the meteorite," the investigators found that "amino acids and sugars could be generated within 3 weeks' exposure to open air in c|uantities
Tür: Education
Taglar: carbonaceous cyanobacteria fossils life meteorite
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