Consulta: subjectFacets:"Sulfate-reducing bacteria"
Registros recuperados: 4
Data/hora: 09/06/2024 04:42:08

The Impact of Methane on Microbial Communities at Marine Arctic Gas Hydrate Bearing Sediment
Provedor de dados: 5
Autores: Carrier, Vincent; Svenning, Mette M.; Grundger, Friederike; Niemann, Helge; Dessandier, Pierre-antoine; Panieri, Giuliana; Kalenitchenko, Dimitri.
Cold seeps are characterized by high biomass, which is supported by the microbial oxidation of the available methane by capable microorganisms. The carbon is subsequently transferred to higher trophic levels. South of Svalbard, five geological mounds shaped by the formation of methane gas hydrates, have been recently located. Methane gas seeping activity has been observed on four of them, and flares were primarily concentrated at their summits. At three of these mounds, and along a distance gradient from their summit to their outskirt, we investigated the eukaryotic and prokaryotic biodiversity linked to 16S and 18S rDNA. Here we show that local methane seepage and other environmental conditions did affect the microbial community structure and composition....
Tipo: Text
Palavras-chave: Arctic; Methane seeps; Prokaryotes; Methanotrophs; ANME; Sulfate-reducing bacteria; Eukaryotes; Foraminifera.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00667/77893/80077.pdf

Bacterial diversity in the sediments of a temperate artificial lake, Rapel reservoir
Provedor de dados: 97
Autores: DORADOR,CRISTINA; CASTILLO,GABRIELA; WITZEL,K. P.; VILA,IRMA.
Rapel reservoir is an eutrophic system in Chile that has undergone a series of anthropogenic impacts in recent decades. To provide a better understanding of the processes occurring in the reservoir, we examined bacterial composition from surface sediments using traditional microbiology techniques and molecular biology tools. Our results showed significant temporal variation in the physical and chemical composition of the water column, but no depth-related differences during the study period. To detect temporal changes in bacterial composition, cultivable heterotrophic bacteria, heterotrophic iron oxidizing bacteria, and sulfate-reducing bacteria were extracted from the surface sediments and their concentration measured. Microbial diversity in sediments was...
Tipo: Journal article
Palavras-chave: Sediments; Sulfate-reducing bacteria; 16S rDNA.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000200007

Recent advances in the study of biocorrosion: an overview
Provedor de dados: 59
Autores: Beech,Iwona B.; Gaylarde,Christine C.
Biocorrosion processes at metal surfaces are associated with microorganisms, or the products of their metabolic activities including enzymes, exopolymers, organic and inorganic acids, as well as volatile compounds such as ammonia or hydrogen sulfide. These can affect cathodic and/or anodic reactions, thus altering electrochemistry at the biofilm/metal interface. Various mechanisms of biocorrosion, reflecting the variety of physiological activities carried out by different types of microorganisms, are identified and recent insights into these mechanisms reviewed. Many modern investigations have centered on the microbially-influenced corrosion of ferrous and copper alloys and particular microorganisms of interest have been the sulfate-reducing bacteria and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Copper; Corrosion; Steel; Sulfate-reducing bacteria; Surface spectroscopy.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000300001

Evaluation of microorganisms with sulfidogenic metabolic potential under anaerobic conditions
Provedor de dados: 52
Autores: Sakamoto,Isabel Kimiko; Maintinguer,Sandra Imaculada; Hirasawa,Julia Sumiko; Adorno,Maria Angela Tallarico; Varesche,Maria Bernadete Amâncio.
The aim of this work was to identify groups of microorganisms that are capable of degrading organic matter utilizing sulfate as an electron acceptor. The assay applied for this purpose consisted of running batch reactors and monitoring lactate consumption, sulfate reduction and sulfide production. A portion of the lactate added to the batch reactors was consumed, and the remainder was converted into acetic, propionic and butyric acid after 111 hours of operation These results indicate the presence of sulfate-reducing bacteria (SRB) catalyzing both complete and incomplete oxidation of organic substrates. The sulfate removal efficiency was 49.5% after 1335 hours of operation under an initial sulfate concentration of 1123 mg/L. The SRB concentrations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sulfate-reducing bacteria; Lactate; Most Probable Number; Organic acids.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500018