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AbstractAbstract
[en] The chemoautotrophic conversion of nitrite to nitrate by Nitrobacter spp. leads to the release of -64.4 to -87.4 kJ/mol of free enthalpy. The reaction optimum is in the pH range 7.1 to 7.4. From the theory of kinetic isotope effects a value of 0.989703 (at 25 0C, inverse) is derived for fractionating of nitrogen isotopes. On the other hand nitrate is used as an electron acceptor in denitrifying under anaerobic conditions. In intensively used agricultural areas depletions occur in the soil zone and high enrichments of 15N are observed in the nitrate of the ground water. These processes are evaluated and the term 'mixing isotope effect' is introduced for interpretation
Original Title
Ueber einige Isotopieeffekte des Stickstoffs in der Bodenzone
Primary Subject
Source
Akademie der Wissenschaften der DDR, Leipzig. Zentralinstitut fuer Isotopen- und Strahlenforschung; 340 p; Jun 1980; p. 141-162; 2. workshop on isotopes in nature; Leipzig, German Democratic Republic; 5 - 9 Nov 1979
Record Type
Report
Literature Type
Conference; Numerical Data
Report Number
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Reference NumberReference Number
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