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Lactococcus bacteriophages isolated from whey and their effects on commercial lactic starters BABT
Oriani,Maria Raquel de Godoy; Yokoya,Fumio.
The incidence of phages of lactic acid bacteria in milk industry and their effects on acidification ability of commercial lactic acid starters were studied. Cheese whey samples (33 samples) were collected from 17 factories. A total of 16 bacteriophages were isolated (12 specific for Lactococcus lactis, 3 for L. diacetylactis and one capable of lysing both species). The results showed that 10% reduction in acidification tests was not good indication of phage in the sample. The majority of samples showed reduction higher than 10%, although only 65% were phage positive. The isolated phages were quite stable and showed no reduction in infectivity even after 20 daily replications. A pool of bacteriophages was prepared from isolates and inoculated in 12...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacteriophage; Lactococcus; Cheese making; Milk; Processing.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000400009
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Reducing COD level on oily effluent by utilizing biosurfactant-producing bacteria BABT
Jacobucci,Daniela Franco Carvalho; Oriani,Maria Raquel de Godoy; Durrant,Lucia Regina.
Two bacteria isolated from crude oil contaminated soil, Pantoea agglomerans and Planococcus citreus, produced biosurfactants utilizing 1.5% of kerosene and olive oil as the sole carbon sources, respectively. The bacteria and the biosurfactants produced were introduced to oily effluent, arising from margarine and soap industry. Emulsification activities were determined by increases in the absorbance of the oil-in-water emulsions at 610 nm, whereas the water-in-oil emulsions were expressed as the height (cm) of the emulsion layers formed. The 72 h incubation experiment resulted in a COD (Chemical Oxygen Demand) reduction of 76% with Planococcus citreus strain and 70% with Pantoea agglomerans.The COD reduction with bacterial biosurfactants was over 50% in 24...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosurfactants; Bacteria; COD; Oily effluent; Bioremediation.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000400029
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