Abstract In experiments on the prebiotic formation of nitric oxides, anoxic mixtures of $ N_{2} $ 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 $ H_{2} $$ O_{2} $. In acid solutions, these anions were reduced and destroyed by $ Fe^{2+} $, 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 via nitrite, 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.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Model experiments on nitrite and nitrate in simulated primeval conditions


    Beteiligte:
    Zohner, A. (Autor:in) / Broda, E. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1979




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    Lokalklassifikation TIB:    535/3908/4290
    BKL:    44.71 Verkehrsmedizin



    Conditions of occurrence for primeval processes of transphosphorylations

    Etaix, Elisabeth / Buvet, René | Online Contents | 1975


    The Search for Primeval Galaxies

    Rowan-Robinson, M. | British Library Online Contents | 1997




    Ice Shedding Experiments With Simulated Ice Shapes

    Papadakis, Michael / Yeong, Hsiung-Wei / Shimoi, Koji et al. | AIAA | 2009