Reduction du nitrate dans les sediments marins. Comparaison des activites mesurees in vitro et in situ

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Contributeur(s) Actes de colloques. Ifremer Brest [ACTES COLLOQ. IFREMER.]. 1986
Identifiant documentaire 9-979
Identifiant OAI oai:archimer.ifremer.fr:979
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Auteur(s): Esteves, J,Bonin, P,Blanc, F,Mille, G,Bertrand, J
Mots clés MED Biogeochemistry Oil pollution Methodology Environmental conditions Experimental research Comparative studies Metabolism Bacteria Sediment chemistry Reduction Nitrates Denitrification Nitrogen cycle
Date de publication 01/10/1984
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Droits de réutilisation info:eu-repo/semantics/openAccess

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In vitro nitrate reduction in hydrocarbon-polluted marine sediments has been studied by flow-through system. By analysing the rate of nitrate comsumption as a function of nitrate concentration the authors determined the Michaelis-Menten kinetics parameters. (km = 330 mu M; vax = 2.0 mu M/g super(-1)/h super(-1). The authors found a value of 60 mu M/m super(-2)/h super(-1) for the rate of in vitro nitrate consumption derived from the above kinetic parameters and from the nitrate concentration in the sediment. In parallel a value of 67.4 mu M/m super(-2)/h super(-1) was found for the rate of nitrate consumption under in situ conditions. The great similarity between both results would favor the in vitro technique as a valid and more convenient one.
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