Biology
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008asbio...8..273n&link_type=abstract
Astrobiology, Volume 8, Issue 2, pp. 273-287.
Biology
8
Prebiotic Chemistry, Early Earth, Titan
Scientific paper
Organic macromolecules (``complex tholins'') were synthesized from a 0.95 N2 / 0.05 CH4 atmosphere in a high-voltage AC flow discharge reactor. When placed in liquid water, specific water soluble compounds in the macromolecules demonstrated Arrhenius type first order kinetics between 273 and 313 K and produced oxygenated organic species with activation energies in the range of ~60 +/- 10 kJ mol-1. These reactions displayed half lives between 0.3 and 17 days at 273 K. Oxygen incorporation into such materials-a necessary step toward the formation of biological molecules-is therefore fast compared to processes that occur on geologic timescales, which include the freezing of impact melt pools and possible cryovolcanic sites on Saturn's organic-rich moon Titan.
Imanaka Hiroshi
Lunine Jonathan I.
Neish Catherine D.
Smith Matthew A.
Somogyi Andrea
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