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	Provedor de dados BJM (1) Rev. Microbiol. (1) Autor Lerayer,Alda L.S. (2) Moreno,Izildinha (2) Baldini,Vera L.S. (1) Leitão,Mauro F. de F. (1) Leitão,Mauro F. de Freitas (1) Palavra-chave Bacteriocins (2) L. lactis (2) Activity spectrum (1) Fermentation (1) Physical-chemical characteristic (1) Plasmids (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2000 (1) 1999 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Detection and characterization of bacteriocin-producing Lactococcus lactis strains Rev. Microbiol. Moreno,Izildinha; Lerayer,Alda L.S.; Leitão,Mauro F. de Freitas. One hundred sixty seven strains of Lactococcus lactis were screened for bacteriocin production by well diffusion assay of GM17 agar. Fourteen (8.4%) produced antimicrobial activity other than organic acids, bacteriophages or hydrogen peroxide. The frequency of bacteriocin production ranged from 2% in L. lactis subsp. cremoris up to 12% in L. lactis subsp. lactis. Antimicrobial activities were not observed in any strain of L. lactis subsp. lactis var. diacetylactis. Among thirteen bacteriocin-producing strains and two nisin-producing strains (L. lactis subsp. lactis ATCC 11454 and L. lactis subsp. lactis CNRZ 150), eight (53%) were characterized as lactose-positive (Lac+) and proteinase-negative (Prt-). The bacteriocin-producing cultures were also... Tipo: Info:eu-repo/semantics/article Palavras-chave: L. lactis; Bacteriocins; Fermentation; Plasmids. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141999000200008 Characterization of bacteriocins produced by Lactococcus lactis strains BJM Moreno,Izildinha; Lerayer,Alda L.S.; Baldini,Vera L.S.; Leitão,Mauro F. de F.. Bacteriocins produced by fifteen strains of Lactococcus lactis (14 L. lactis subsp. lactis and one L. lactis subsp. cremoris) were heat resistant, sensitive to several proteolytic enzymes and active over a wide range of pH. Their resistance to the heating was greatly influenced by the pH. Only the strain L. lactis subsp. lactis ITAL 383 produced a bacteriocin with a wide activity spectrum, similar to nisin of L. lactis subsp. lactis ATCC 11454. This bacteriocin inhibited closely related species and other Gram-positive microorganisms including Listeria monocytogenes and Staphylococcus aureus, but it was not active against the Gram-negative bacteria tested. The identification of partially purified antimicrobial compounds by SDS-PAGE showed that bacteriocin... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacteriocins; L. lactis; Activity spectrum; Physical-chemical characteristic. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000300007 Registros recuperados: 2 Primeira ... 1 ... Última

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