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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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Effect of pH and salt gradient on the autolysis of Lactococcus lactis strains BJM
Ramírez-Nuñez,Jennifer; Romero-Medrano,Ruth; Nevárez-Moorillón,Guadalupe V.; Gutiérrez-Méndez,Néstor.
The aim of this work was to assess in-vitro the effect of pH and salt concentration on the rate of autolysis in L. lactis strains. Regardless autolysis variation among L. lactis strains, statistical analysis showed evidence of increase of autolysis in L. lactis under low salt concentration and acidic conditions.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Autolysis; Lactococcus; Flavor; Cheese.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400036
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Microbial characterization and diversity of artisanal Ranchero cheese with emphasis in Lactococcus strains Ciênc. Tecnol. Aliment.
GALLEGOS-ACEVEDO,Mario-Alejandro; CHÁVEZ-MARTÍNEZ,América; CORRAL-LUNA,Agustín; RENTERÍA-MONTERRUBIO,Ana-Luisa; BURROLA-BARRAZA,M. Eduvigues; LECHUGA-VALLES,Ruth; DOMINGUEZ-VIVEROS,Joel; CASTILLO-GONZÁLEZ,Alva-Rocío; SÁNCHEZ-VEGA,Rogelio.
Abstract The aim of this work is to characterize the natural microflora of artisanal Ranchero cheese and to identify Lactococcus isolates. Ten artisanal Ranchero cheese samples made with raw milk were obtained from local producers located in different geographical areas. Aerobic mesophilic, Staphylococci, Psychrophilic , total coliforms, molds, yeast and, lactic acid bacteria (LAB) (Lactococcus , Streptococcus mesophilic and thermophilic, Lactobacillus , Enterococcus, Leuconostoc) were numbered through agar plating. LAB isolates were classified by genus. Then, nineteen randomly selected presumptive Lactococcus isolates were assigned to specie by PCR amplification and DNA sequence. A high number of aerobic mesophilic Staphylococci, Psychrophilic, total...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactococcus; Microbiota; Artisanal Ranchero cheese.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000100143
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