Sulphate Reducing Bacteria
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Carbon steel corrosion induced by sulphate-reducing bacteria in artificial seawater: electrochemical and morphological characterizations
ABSTRACT In this work, the corrosion behavior of carbon steel AISI 1020 was evaluated in artificial seawater in the presence of mixed sulfate-reducing bacteria (SRB) culture isolated from the rust of a pipeline. The corrosion evaluation was performed by electrochemical techniques (open circuit potential (Eocp), polarization curves and electrochemical impedan
Matéria (Rio J.). Publicado em: 2016-12
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2. Bioavailability of pollutants in bacterial communities of Rodrigo de Freitas Lagoon, Rio de Janeiro, Brazil
Processes involving heavy metals and other contaminants continue to present unsolved environmental questions. To advance the understanding of geochemical processes that involve the bioavailability of contaminants, cores where collected in the Rodrigo de Freitas lagoon, and analyzed for bacterial activity and metal concentrations. Results would suggest an ext
Braz. J. Microbiol.. Publicado em: 2014-09
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3. Occurrence of sulphate reducing bacteria (SRB) associated with biocorrosion on metallic surfaces in a hydroelectric power station in Ibirama (SC) - Brazil
The aim of this study was evaluate, two methods for the detection and identification of sulphate reducing bacteria (SRB): ML medium and PCR with specific primers for SRB groups. SRB were detected through the selective medium only on carbon steel, which showed corrosion. Employing specific PCR primer, SBR were detected from all the metallic components assayed
Braz. arch. biol. technol.. Publicado em: 2013-10
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4. Produção biogênica de sulfetos em amostras de água e óleo / Biogenic sulphate production in water and oil samples
Durante a exploração de petróleo offshore (fora da costa), a injeção de água do mar no processo de recuperação secundária de petróleo, ocasiona a produção de sulfeto de hidrogênio (H2S) pela presença das bactérias redutoras de sulfato (BRS), que reduzem o sulfato presente na água em sulfeto. A produção intensiva de H2S tem sido um dos maior
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/01/2012
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5. Efeito da aplicação de nitrato na redução biogênica de sulfeto sob diferentes concentrações iniciais de bactérias redutoras de nitrato e sulfato
The effect of sodium nitrate application in the reduction of biogenic sulphide was evaluated through a 2k complete factorial design, using as variable response the production of sulfide at intervals of incubation of 7, 14 and 28 days. The most effective condition for reducing the sulphide production (final concentrations from 0.4 to 1.6 mg S2- L-1) was obtai
Química Nova. Publicado em: 2010
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6. Agentes inibidores da atividade metabólica e do processo de adesão de Desulfotomaculum nigrificans em superfície de aço inoxidável / Agents of inhibition of the metabolic activity and of the process of adhesion of Desulfotomaculum nigrificans in surface of stainless steel
As bactérias redutoras de sulfato (BRS) são consideradas o principal grupo de microrganismos envolvidos na formação de biofilmes e biocorrosão de oleodutos. A prevenção e o controle do crescimento desse grupo bacteriano têm sido realizados principalmente pela utilização de agentes biocidas ou bacteriostáticos, bem como pelo uso de inibidores metab
Publicado em: 2009
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7. The bioactivation procedure for increasing the sulphate-reducing bacteria in a UASB reactor
Bioactivation, a procedure to obtain anaerobic sulphidogenic sludge, was developed in order to increase sulphate reduction and, consequently, sulphide production to remove metals from effluents. This procedure, in which the source of carbon/energy (lactate) is gradually replaced, consisted of three operational conditions. It was observed that bioactivation t
Brazilian Journal of Chemical Engineering. Publicado em: 2005-12
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8. EVALUATION OF BIOCIDES ACTIVE BASES FOR MICROORGANISMSNULL CONTROL IN SECONDARY OIL RECOVERY SYSTEMS / AVALIAÇÃO DE BASES ATIVAS BIOCIDAS PARA CONTROLE DE MICRORGANISMOS EM SISTEMAS DE RECUPERAÇÃO SECUNDÁRIA DE PETRÓLEO
O uso de produtos biocidas de baixa eficiência ou que apresentem elevado caráter tóxico podem levar a sérias conseqüências em termos dos efeitos para a recuperação do petróleo e, também, relacionadas com aspectos de saúde ocupacional e de meio ambiente. Assim, foi desenvolvido um estudo para selecionar, dentre as bases ativas disponíveis no merca
Publicado em: 2004
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9. RadA protein from Archaeoglobus fulgidus forms rings, nucleoprotein filaments and catalyses homologous recombination
Proteins that catalyse homologous recombination have been identified in all living organisms and are essential for the repair of damaged DNA as well as for the generation of genetic diversity. In bacteria homologous recombination is performed by the RecA protein, whereas in the eukarya a related protein called Rad51 is required to catalyse recombination and
Oxford University Press.