Computer Science
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977orli....8..361b&link_type=abstract
Origins of Life, Volume 8, Issue 4, pp.361-370
Computer Science
3
Scientific paper
In model experiments of chemical evolution, the accumulation of redox energy has been achieved up to now only within gaseous phase. Such experiments lead to atmospheric precursors and involve an accumulation of large quantities of free enthalpy. A part of this energy can be released after dissolution of the precursors in aqueous media, either by simple multiple bond hydration, or by addition of heteroatomic reagents more nucleophilic than water, or by addition of carbonaceous nucleophiles. Energy balances of such processes are discussed. The non-enzymic photochemical accumulation of redox energy in aqueous phase appears later on feasible, but the main unsolved problem lies in the understanding of the primordial processes which made the conversion of redox energy into energy available from hydrolysis possible in aqueous media in the earliest stage of chemical evolution. In this respect, chemiosmotic or configurational interpretations of oxidative phosphorylations cannot be taken into consideration because they require complex structures which cannot be allowed for at this early stage. On the contrary, a discussion of the energetics and kinetics of electron transfers to and from substrates makes understandable the basic principles involved in the energy storage processes by means of the chemical hypothesis, as well as their likely occurrence, even in a non-enzymic form, from the very earliest stages of chemical evolution.
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