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	Provedor de dados ArchiMer (2) Autor Bertrand, J (2) Berland, B (1) Blanc, F (1) Bonin, P (1) Esteves, J (1) Goutx, H (1) Leveau, M (1) Mille, G (1) Mais... Palavra-chave Bacteria (2) Oil pollution (2) Biodegradation (1) Biogeochemistry (1) Comparative studies (1) Crude oil (1) Denitrification (1) Environmental conditions (1) Experimental research (1) MED (1) Metabolism (1) Methodology (1) Nitrates (1) Nitrogen cycle (1) Phytoplankton (1) Reduction (1) Sediment chemistry (1) Toxicity (1) Mais... Tipo do documento Text (2) Ano 1984 (2) País France (2) Idioma Francês (1) Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Effects of petroleum biodegradation products on phytoplankton growth. ArchiMer Goutx, H; Berland, B; Leveau, M; Bertrand, J. The effects of products resulting from petroleum biodegradation in continuous culture, have been studied on the growth of two marine algae. Sugars, lipids and amino acids are the main components resulting from petroleum degradation in the bacteria used medium. Their concentrations are respectively 600 mg.l super(-1), 46 mg.l super(-1) and 74.2 mu M.l super(-1). The algae growth is inhibited when products are enough concentrated; it is stimulated by low concentration. Among these products, lipids are more toxic than others. The two species show different sensitivity towards the used medium. Prorocentrum micans growth is more inhibited than that of Phaeodactylum tricornutum . Tipo: Text Palavras-chave: Bacteria; Phytoplankton; Toxicity; Oil pollution; Crude oil; Biodegradation. Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-1017.pdf Reduction du nitrate dans les sediments marins. Comparaison des activites mesurees in vitro et in situ ArchiMer Esteves, J; Bonin, P; Blanc, F; Mille, G; Bertrand, J. 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. Tipo: Text Palavras-chave: MED; Biogeochemistry; Oil pollution; Methodology; Environmental conditions; Experimental research; Comparative studies; Metabolism; Bacteria; Sediment chemistry; Reduction; Nitrates; Denitrification; Nitrogen cycle. Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-979.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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