The Origins of Life on the Earth |
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Page 98
... prebiotic conditions . The irradiation with y rays of ethylene and CO2 at high pressures produces very long chain fatty acids . However , no variation of this type of experiment which yields fatty acids under primitive earth conditions ...
... prebiotic conditions . The irradiation with y rays of ethylene and CO2 at high pressures produces very long chain fatty acids . However , no variation of this type of experiment which yields fatty acids under primitive earth conditions ...
Page 221
... prebiotic conditions . The synthesis of sugars from formaldehyde was described a century ago by Butlerov . This reaction has been reinvestigated repeatedly and has been carried out at moderate temperatures and pH's on the surface of ...
... prebiotic conditions . The synthesis of sugars from formaldehyde was described a century ago by Butlerov . This reaction has been reinvestigated repeatedly and has been carried out at moderate temperatures and pH's on the surface of ...
Page 222
... prebiotic membrane systems . Although many important biochemicals can be synthesized under pre- biotic conditions , we know much less about prebiotic condensation reactions . It has , for example , turned out to be surprisingly ...
... prebiotic membrane systems . Although many important biochemicals can be synthesized under pre- biotic conditions , we know much less about prebiotic condensation reactions . It has , for example , turned out to be surprisingly ...
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