Encontrados 13 documentos, a visualizar página 1 de 2
Optimization and characterization of biosurfactant production by Bacillus subti...
Pereira, J. F.; Gudiña, Eduardo J.; Costa, Rita; Vitorino, Rui; Teixeira, J. A.; Coutinho, João A. P.; Rodrigues, L. R.Biosurfactant production by three Bacillus subtilis strains (#309, #311 and #573) isolated from Brazilian crude oils was optimized based on different carbon and nitrogen sources. The lowest surface tension values were obtained using sucrose containing media for the three isolates. Biosurfactants produced by each strain were characterized by Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic...
Biosurfactant-producing and oil-degrading Bacillus subtilis strains enhance oil...
Gudiña, Eduardo J.; Pereira, J. F.; Costa, Rita; Coutinho, João A. P.; Teixeira, J. A.; Rodrigues, L. R.Microbial Enhanced Oil Recovery (MEOR) technology uses microorganisms and their metabolites to retrieve unrecoverable oil from mature reservoirs. In situ stimulation of biosurfactant-producing and oil-degrading microorganisms reduces the capillary forces retaining the oil inside the reservoir and decreases its viscosity, thus promoting oil flow and consequently production. In this work, a sand-pack column model...
A biosurfactant-producing and oil-degrading Bacillus subtilis strain enhances o...
Gudiña, Eduardo J.; Pereira, J. F.; Costa, Rita; Rodrigues, L. R.; Coutinho, João A. P.; Teixeira, J. A.Microbial Enhanced Oil Recovery (MEOR) is potentially useful to increment oil recovery from reservoirs beyond primary and secondary recovery operations using microorganisms and their metabolites. In situ stimulation of microorganisms that produce biosurfactants and degrade heavy oil fractions reduces the capillary forces that retain the oil inside the reservoir and decreases oil viscosity, thus promoting its fl...
Evaluation and characterization of biosurfactants produced by microorganisms is...
Pereira, J. F.; Gudiña, Eduardo J.; Costa, Rita; Rodrigues, L. R.; Teixeira, J. A.; Coutinho, João A. P.Surface-active agents or surfactants are amphiphilic molecules that comprise both hydrophilic and hydrophobic moieties, allowing the reduction of the surface and interfacial tensions, as well as the formation of oil in water or water in oil emulsions. Due to their interesting properties, surfactants are widely used by petroleum industries to reduce the capillary forces that retain the oil inside the reservoir. ...
Biosurfactant producing microorganisms and its application to enhanced oil reco...
Gudiña, Eduardo J.; Pereira, J. F.; Rodrigues, L. R.; Coutinho, J. A.; Teixeira, J. A.; Soares, L. P.Microbial Enhanced Oil Recovery (MEOR) is a tertiary oil recovery process where microorganisms and their metabolites are used to retrieve unrecoverable oil from mature reservoirs. Stimulation of biosurfactant production by indigenous microorganisms can reduce the capillary forces that retain the oil into the reservoir. The studied reservoir is characterized by alternated oil and water sand layers, with an avera...
Evaluation of the potential of microorganisms isolated from Brazilian oils for ...
Pereira, J. F.; Coutinho, João A. P.; Gudiña, Eduardo J.; Rodrigues, L. R.; Teixeira, J. A.
Isolation of biosurfactant-producing microorganisms from oil samples for use in...
Gudiña, Eduardo J.; Rodrigues, L. R.; Pereira, J. F.; Coutinho, João A. P.; Teixeira, J. A.
Manual da ferramenta Planejo: planejamento da colheita e controle da produção f...
SILVA, J. N. M.; CARVALHO, J. O. P. de; PEREIRA, J. F.; RUSCHEL, A. R.; PUERTA, R; MARTINS FILHO, S. E. C.; TAVARES, M. J. M.; LELIS, E. A.2008 ; Disponível também on-line.
Ameixeira: Histórico e perspectivas de cultivo.
CASTRO, L. A. S. de.; NAKASU, B. H.; PEREIRA, J. F. M.2008
A cultura da pêra.
NAKASU, B. H.; HERTER, F. G.; CAMELATTO, D.; REISSER JÚNIOR, C.; FORTES, J. F.; CASTRO, L. A. S. de; RASEIRA, A.; FREIRE, C. J. da S.Introdução; Clima; Cultivares; Polinização; Solo, Calagem; Adubação; Plantio; Poda e condução; Quebra de dormência; Irrigação; Pragas; Doenças; Colheita; Comercialiação; Anexo. ; 2007
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