The Origins of Life on the Earth |
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Page 39
... oxidation must have escaped from the atmosphere . Hydrogen must also have been released during the oxidation of FeO to Fe2O3 . Table 4-2 summarizes the quantities of hydrogen involved . The largest source of hydrogen must have been ...
... oxidation must have escaped from the atmosphere . Hydrogen must also have been released during the oxidation of FeO to Fe2O3 . Table 4-2 summarizes the quantities of hydrogen involved . The largest source of hydrogen must have been ...
Page 107
... oxidation state of guanine is higher than that of adenine so that its formation from 4 - aminoimidazole - 5 - carbonitrile derivatives requires the addition of a one - carbon molecule at the oxidation level of CO2 . Also , in order to ...
... oxidation state of guanine is higher than that of adenine so that its formation from 4 - aminoimidazole - 5 - carbonitrile derivatives requires the addition of a one - carbon molecule at the oxidation level of CO2 . Also , in order to ...
Page 182
... oxidation to sulfur , and so this photosynthetic reaction would have developed later . The photochemical oxidation of hydrogen sulfide to sulfate takes place in the Purple Sulfur Bacteria ( Thio- rhodaceae - e.g . , Chromatium vinosum ) ...
... oxidation to sulfur , and so this photosynthetic reaction would have developed later . The photochemical oxidation of hydrogen sulfide to sulfate takes place in the Purple Sulfur Bacteria ( Thio- rhodaceae - e.g . , Chromatium vinosum ) ...
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