caa a22 4500 465744702 CHVBK 20180323111817.0 cr unu---uuuuu 170327e19900501xx s 000 0 eng 10.1007/BF01808111 doi (NATIONALLICENCE)springer-10.1007/BF01808111 Mauzerall David The Rockefeller University, 1230 York Avenue, 10021, New York, NY, USA aut The photochemical origins of life and photoreaction of ferrous ion in the archaean oceans [Elektronische Daten] [David Mauzerall] A general argument is made for the photochemical origins of life. A constant flux of free energy is required to maintain the organized state of matter called life. Solar photons are the unique source of the large amounts of energy probably require to initiate this organization and certainly required for the evolution of life to occur. The completion of this argument will require the experimental determination of suitable photochemical reactions. Our work shows that biogenetic porphyrins readily photooxidize substrates and emit hydrogen in the presence of a catalyst. These results are consistent with the Granick hypothesis, which relates a biosynthetic pathway to its evolutionary origin. We have shown that photoexcitation of ferrous ion at neutral pH with near ultraviolet light produces hydrogen with high quantum yield. This same simple system may reduce carbon dioxide to formaldehyde and further products. These reactions offer a solution to the dilemma confronting the Oparin-Urey-Miller model of the chemical origin of life. If carbon dioxide is the main form of carbon on the primitive earth, the ferrous photoreaction may provide the reduced carbon necessary for the formation of amino acids and other biogenic molecules. These results suggest that this progenitor of modern photosynthesis may have contributed to the chemical origins of life. Kluwer Academic Publishers, 1990 Origins of life and evolution of the biosphere Kluwer Academic Publishers 20/3-4(1990-05-01), 293-302 0169-6149 20:3-4<293 1990 20 11084 https://doi.org/10.1007/BF01808111 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01808111 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Mauzerall David The Rockefeller University, 1230 York Avenue, 10021, New York, NY, USA aut NATIONALLICENCE 773 0- Origins of life and evolution of the biosphere Kluwer Academic Publishers 20/3-4(1990-05-01), 293-302 0169-6149 20:3-4<293 1990 20 11084 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer