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	Provedor de dados ArchiMer (2) Autor Herbert, R (2) Keith, S (1) Palavra-chave Bacteria (2) Biogeochemistry (2) Ammonia (1) Analytical techniques (1) Anoxic sediments (1) Carbon cycle (1) Chromatium vinosum (1) Clostridium butyricum (1) Desulfovibrio desulfuricans (1) Detritus (1) Estuaries (1) Estuarine sedimentation (1) Interspecific relationships (1) Microbiology (1) Mineralization (1) Models (1) Nitrates (1) Nitrogen cycle (1) Seasonal variations (1) Sediment chemistry (1) Mais... Tipo do documento Text (2) Ano 1984 (2) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última A laboratory model system for analysing microbial interactions occurring in anoxic estuarine sediments. ArchiMer Herbert, R; Keith, S. Defined mixed populations of Clostridium butyricum, Desulfovibrio desulfuricans and Chromatium vinosum co-existed for long periods when grown in a single stage chemostat with glucose as sole carbon source. The nature and availability of the inorganic nitrogen source exerted a major effect on carbon flow in the experimental system. The data show that both the C. butyricum and D. desulfuricans isolates can utilise NO sub(3) as an e super(-)acceptor with an increase in cell yield. Under these growth conditions the free S super(2-) levels were lower resulting in more stable mixed populations. In addition the data show that the C. butyricum produces more oxidised fermentation end-products (acetate) when NO sub(3) super(-) was available and more reduced products... Tipo: Text Palavras-chave: Chromatium vinosum; Desulfovibrio desulfuricans; Clostridium butyricum; Biogeochemistry; Models; Bacteria; Detritus; Mineralization; Anoxic sediments; Estuarine sedimentation; Analytical techniques; Carbon cycle; Interspecific relationships; Microbiology. Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-947.pdf Nitrate respiration and nitrification in estuarine sediments. ArchiMer Herbert, R. Seasonal data and depth profiles using super(15)N-labelled NO sub(3)u- show that denitrification (77-90% of NO sub(3)u- respired) rather than NO sub(3)u- dissimilation to NH sub(4)u+ was the principal route of nitrate reduction in Kingoodie Bay sediments. Populations of both groups of NO sub(3)u- reducing bacteria were highest in the 0-20 mm horizon in those sediments where highest rates of NO sub(3)u- respiration were recorded (28.56 mu g N.d super(-1) dry wt. sediment super(-1)). Autotrophic nitrification rates shared a marked seasonality with highest rates (0.92 mu g N.d super(-1).g dry wt. sediment super(-1)) occurring during the summer. Maximum populations of autotrophic nitrifying bacteria were also found in the 0-20 mm sediment horizon and these... Tipo: Text Palavras-chave: Seasonal variations; Bacteria; Estuaries; Sediment chemistry; Biogeochemistry; Ammonia; Nitrates; Nitrogen cycle. Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-971.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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