PMID: 41204Sep 1, 1979

Model experiments on nitrite and nitrate in simulated primeval conditions

Origins of Life
A Zohner, E Broda

Abstract

In experiments on the prebiotic formation of nitric oxides, anoxic mixtures of N2 and water vapour were sparked in contact with phosphate buffer solutions at various pH values. Nitrite was found in the aqueous phase, and nitrate grew from it, presumably by reaction with H2O2. In acid solutions, these anions were reduced and destroyed by Fe2+, and the same was true of nitrite in solutions kept at a pH value similar to that of the contemporary ocean (8.2) with HEPES buffer. Nitrate was not destroyed in short-term experiments, but as in sparking nitrate is formed only vianitrite, neither anion could accumulate. In further sparking experiments with alkaline sulphide, both nitrite and nitrate were reduced entirely. It is concluded that it is unlikely that the primeval ocean contained appreciable concentrations of nitrite or nitrate either at the reducing or at the redox-neutral stage.

References

Jan 22, 2008·Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life·H James CleavesJeffrey L Bada
May 9, 2012·Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life·Soujanya SingireddyDaniel R Strongin
Aug 21, 2013·Origins of Life and Evolution of the Biosphere : the Journal of the International Society for the Study of the Origin of Life·Alexander D GordonDaniel R Strongin
Jan 1, 1982·Antonie van Leeuwenhoek·M R Betlach

Related Concepts

Anaerobiosis
Nitrates
Nitric Oxide
Nitrites
Hydrogen-Ion Concentration
Origin of Life
Iron

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