The Mystery of Life's Origin: Reassessing Current Theories |
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Page 77
... oxygen were present , organic molecules could not be formed at all . In the words of Shklovskii and Sagan , " As soon as the net [ laboratory ] conditions become oxidizing , the organic syntheses effectively turn off . " 43 All the ...
... oxygen were present , organic molecules could not be formed at all . In the words of Shklovskii and Sagan , " As soon as the net [ laboratory ] conditions become oxidizing , the organic syntheses effectively turn off . " 43 All the ...
Page 78
... oxygen produced and its probable date of appearance in geological history . Volcanic Exhalation as a Possible Source of Free Oxygen . It has previously been suggested that the earth's atmosphere was pro- duced by volcanic eruptions ...
... oxygen produced and its probable date of appearance in geological history . Volcanic Exhalation as a Possible Source of Free Oxygen . It has previously been suggested that the earth's atmosphere was pro- duced by volcanic eruptions ...
Page 80
... oxygen levels were probably 0.01 to 0.1 PAL . Holland55 has stated that a few percent of the present atmospheric level of oxygen was certainly present by 2.9 x 109 years ago . How- ever , as shown in table 5-1 the estimates cover too ...
... oxygen levels were probably 0.01 to 0.1 PAL . Holland55 has stated that a few percent of the present atmospheric level of oxygen was certainly present by 2.9 x 109 years ago . How- ever , as shown in table 5-1 the estimates cover too ...
Contents
The Theory of Biochemical | 11 |
Simulation of Prebiotic Monomer | 18 |
The Myth of the Prebiotic Soup | 42 |
Copyright | |
7 other sections not shown
Common terms and phrases
abiogenesis alanine amino acids ammonia aspartic acid billion years ago Biol biological biomonomers calculated carbon cells Chapter chemical evolution coacervates complex concentration configurational entropy dilute DNA and protein early earth energy flow energy source equilibrium evidence Evol experimental Folsome formaldehyde formation free oxygen gases geological Gibbs free energy glycine H₂O heat hydrogen hydrogen sulfide Ibid kcal/mole L.E. Orgel laboratory law of thermodynamics life's origin living systems macromolecules mechanism metaphysical microspheres mineral models Molecular Nature nucleic acids occur operation science organic compounds origin science oxidizing oxygen Panspermia peptide photodissociation photosensitization planets plausible polymerization polymers polypeptides Ponnamperuma prebiotic prebiotic simulation experiments precursors present Prigogine primitive atmosphere primitive earth problem processes produced protein proteinoids protocell random reaction result S.L. Miller S.W. Fox Sagan scientists second law sequence solar soup spontaneous Steinman structure synthesis temperature Theoret theory thermal entropy tion ultraviolet light York