The Origins of Life on the Earth |
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Page 10
... gases , from the dust particles , while in fact they were in part retained . These considerations imply that the earth was formed at quite a low temperature . There are some workers who disagree with this conclusion and believe that the ...
... gases , from the dust particles , while in fact they were in part retained . These considerations imply that the earth was formed at quite a low temperature . There are some workers who disagree with this conclusion and believe that the ...
Page 13
... gases are produced from melted crustal rocks and recirculated ground water . It has not been proved that any of the gases which are found in volcanoes come from the interior of the earth . Thus , the composition of present - day volcanic ...
... gases are produced from melted crustal rocks and recirculated ground water . It has not been proved that any of the gases which are found in volcanoes come from the interior of the earth . Thus , the composition of present - day volcanic ...
Page 14
... Gases . The figures for the gases excluding water — are in volume percent . The value for water is its percentage of the total gases . Since air is usually present in the samples collected , the figures in the table have been corrected ...
... Gases . The figures for the gases excluding water — are in volume percent . The value for water is its percentage of the total gases . Since air is usually present in the samples collected , the figures in the table have been corrected ...
Contents
PREBIOTIC SYNTHESIS OF PURINES PYRIMIDINES | 8 |
THE COMPOSITION | 12 |
GEOLOGICAL EVIDENCE | 16 |
Copyright | |
21 other sections not shown
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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