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Science Forum Index » Bio Evolution Forum » UV on Ice
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| Tom Hendricks |
 Posted: Fri Mar 28, 2008 8:01 am |
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Guest
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UV on space ice - study. New stuff
A Detailed Study of the Amino Acids Produced
from the Vacuum UV Irradiation of Interstellar
Ice Analogs
Michel Nuevo & Geneviève Auger & Didier Blanot &
Louis d’Hendecourt
Received: 9 November 2006 / Accepted: 8 November 2007
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Published online: 4 January 2008
I quote some of the conclusion:
Conclusion
The chemical analyses of several organic residues
formed by the VUV irradiation of
interstellar ice analogs under different experimental
conditions and subsequent warm-up to
room temperature clearly indicate that amino acids,
chosen as significant complex organic
molecule tracers, are always formed after the acid
hydrolysis of the residues. It was shown
that the temperature, the irradiation time and the
substrate have no significant effect on the
distribution of the amino acids detected after
chemical analysis of the residues. However,
the relative proportions of the ice mixture components
may affect the absolute total amino
acid quantities in the residues, and the photon dose
may have an effect on their final
distribution.
According to the present work, the production of
complex organics is an efficient
process when the ice mixture contains C, H, O and N.
Moreover, the irradiation times in our
experiments are compatible in terms of photon dose to
what is expected for a molecular
cloud during its lifetime, where the irradiation of
interstellar grains can initiate the
photochemical reactions leading to complex
interstellar molecules in such clouds and
protostars.
I think it is clear that UV is the reasonable source
for the energy that forced chemicals to respond in the
way we call life processes - the most stable chemical
reaction in that environment. (Vacuum ultraviolet). |
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