The Origins of Life on the Earth |
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Page 47
... ocean - sediments system there are two further factors to be considered ... primitive ocean exceeded this figure , it seems likely that the NH would have been taken up by clay ... Primitive Atmosphere 47 Nitrogen in the Primitive Atmosphere,
... ocean - sediments system there are two further factors to be considered ... primitive ocean exceeded this figure , it seems likely that the NH would have been taken up by clay ... Primitive Atmosphere 47 Nitrogen in the Primitive Atmosphere,
Page 53
... ocean water and its effect on the chemistry of the atmosphere , " Proc . Nat . Acad . Sci . 53 , 1173 ( 1965 ) ... Primitive atmosphere of the earth , ” Nature 212 , 1225 ( 1966 ) . P. H. Abelson , " Chemical events on the primitive earth ...
... ocean water and its effect on the chemistry of the atmosphere , " Proc . Nat . Acad . Sci . 53 , 1173 ( 1965 ) ... Primitive atmosphere of the earth , ” Nature 212 , 1225 ( 1966 ) . P. H. Abelson , " Chemical events on the primitive earth ...
Page 129
... primitive ocean is often described as a warm , dilute soup , but in the last chapter we showed that a cold ocean would have provided a more advantageous environment for the accumulation and use of prebiotic organic compounds . Nor is it ...
... primitive ocean is often described as a warm , dilute soup , but in the last chapter we showed that a cold ocean would have provided a more advantageous environment for the accumulation and use of prebiotic organic compounds . Nor is it ...
Contents
PREBIOTIC SYNTHESIS OF PURINES PYRIMIDINES | 8 |
THE COMPOSITION | 12 |
GEOLOGICAL EVIDENCE | 16 |
Copyright | |
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abundant active adenine alanine aldehydes amino acids ammonia ammonium amounts anticodon aqueous solution aspartic acid biochemical biological CaCO3 carbon CH₂ chain chemical chert CO₂ concentration condensation contain COOH cyanoacetylene cytosine decomposition dust cloud electric discharge energy enzyme equilibrium escape layer evolution example formaldehyde formation formed gases genetic geological glutamic acid glycine H₂ H₂N H₂O hydrocarbons hydrogen cyanide hydrolysis hydrolyzed important inorganic L. E. Orgel limestone living organisms material mechanism membranes metabolism meteorites methane minerals mixture molecules N₂ NH₂ nitrogen nucleic acids nucleotides O₂ obtained occur organic compounds origin oxidation oxygen pathways peptide phosphate phosphorylation photochemical photosynthesis planets polymers polynucleotides polypeptides prebiotic prebiotic synthesis Precambrian present pressure primitive atmosphere primitive earth primitive ocean purines reaction replication rocks Schopf Science sequence solar system structure sugars surface t-RNA temperature ultraviolet light volcanoes yield