The Origins of Life on the Earth |
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Page 11
... ammonium silicates , other ammonium compounds , and perhaps nitrides ; carbon could have been present as graphite , carbides , and perhaps carbonates ; water could have been present in hydrated minerals . The molecules CN , C2 , and CH ...
... ammonium silicates , other ammonium compounds , and perhaps nitrides ; carbon could have been present as graphite , carbides , and perhaps carbonates ; water could have been present in hydrated minerals . The molecules CN , C2 , and CH ...
Page 104
... ammonium cyanide . Oró and his coworkers discovered that if concentrated ammonia solutions containing cyanide ( 1-10 M ) are refluxed , adenine is formed in yields of up to 1 / 2 % , along with large amounts of the usual hydrogen ...
... ammonium cyanide . Oró and his coworkers discovered that if concentrated ammonia solutions containing cyanide ( 1-10 M ) are refluxed , adenine is formed in yields of up to 1 / 2 % , along with large amounts of the usual hydrogen ...
Page 225
... Ammonium cyanide , 87 , 90 , 95 , 104 Ammonium silicates , 11 Anorthite , 41 Antibiotics , 63 Anticodons , 163 , 164 Arginine , 69 , 119 Aromatic hydrocarbons , 97 Asparagine , 68 , 90 , 95 , 121 Aspartic acid , 48 , 68 , 85 , 87 , 90 ...
... Ammonium cyanide , 87 , 90 , 95 , 104 Ammonium silicates , 11 Anorthite , 41 Antibiotics , 63 Anticodons , 163 , 164 Arginine , 69 , 119 Aromatic hydrocarbons , 97 Asparagine , 68 , 90 , 95 , 121 Aspartic acid , 48 , 68 , 85 , 87 , 90 ...
Contents
PREBIOTIC SYNTHESIS OF PURINES PYRIMIDINES | 8 |
THE COMPOSITION | 12 |
GEOLOGICAL EVIDENCE | 16 |
Copyright | |
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Common terms and phrases
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