Biology
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.103..189h&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 103, no. 1, Aug. 1984, p. 189-193.
Biology
6
Bacteriology, Exobiology, Extraterrestrial Life, Interstellar Chemistry, Interstellar Matter, Organic Phosphorus Compounds, Interstellar Extinction, Molecular Clouds, Particle Density (Concentration), Phosphorus Metabolism
Scientific paper
It is pointed out that bacterial grains produce extinction of starlight dominantly by scattering. If conditions in molecular clouds are similar to those for the distributed interstellar medium of the solar neighborhood, undifferentiated interchanges of grains and of hydrogen between the clouds and the distributed medium have no effect on the question of phosphorus availability. However, if there are differences, the possibility exists that phosphorus accumulates in the distributed medium. Attention is given to questions regarding the phosphorus requirement, the approximate chemical composition of an Escherichia coli cell, aspects of phosphorus availability, and the Galaxy as a biological system.
Hoyle Fiona
Wickramasinghe Chandra N.
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