The presence of salt and a curing agent reduces bacteriocin production by Lactobacillus sakai CTC 494, a potential starter culture for sausage fermentation
Article Abstract:
A mathematical model describing the combined effects of sodium chloride and sodium nitrite on growth and bacteriocin production in Lactobacillus sakei CTC 494 has been developed. Sodium chloride and sodium nitrite have been found to interfere with growth of L. sakei CTC 494, which produces the antilisterial bacteriocin sakacin K. The study used in vitro fermentation. The conditions in the batter of raw fermented sausages may cut efficiency of bacteriocin-producing starter cultures. Sodium chloride dramatically influenced bacteriocin production by cutting biomass production and specific bacteriocin production. Sodium nitrite had no effect on specific bacteriocin production and enhanced the toxic effect of lactic acid on bacterial growth. Other elements of sausage are being studied.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
Response surface models to describe the effects of temperature, pH, and ethanol concentration on growth kinetics and fermentation end products of a Pectinatus sp
Article Abstract:
A mathematical model efficiently gives an indication of growth, and propionate and acetate production by a Pectinatus species during beer spoilage. This allows for the estimation of the risk of contamination of beer in a brewery process. The optimal conditions for the growth rate as estimated from the model are a temperature of 35 degrees Celsius, a pH of 6.5 and 0% ethanol concentration. The optimal conditions for cell density and cell yield are 32 degree Celsius, a pH of 6.0 and 1% ethanol. Ethanol concentrations above 8% and pH values below 4.0 are unfavourable for growth.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
General model, based on two mixed Weibull distributions of bacterial resistance, for describing various shapes of inactivation curves
Article Abstract:
A new primary model, based on two mixed Weibull distributions of cell resistance is proposed to describe the survival curves and the change in the pattern with the modifications of resistance of two assumed subpopulations of bacteria. The parameters of the model were stable and showed consistent evolution according to the initial physiological state of the bacterial population.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Phenotypic expression of PCR-generated random mutations in a Pseudomonas putida gene after its introduction into an Acinetobacter chromosome by natural transformation
- Abstracts: A ribonucleic antiterminator sequence (RAT) and a distinct palindrome are both involved in sucrose induction of the Bacillus subtilis sacXY regulatory operon
- Abstracts: Sequence and DNA structural determinants of N4 virion RNA polymerase-promoter recognition. E. coli SSB activates N4 virion RNA polymerase promoters by stabilizing a DNA hairpin required for promoter recognition
- Abstracts: The antibacterial action of protamine: evidence for disruption of cytoplasmic membrane energization in Salmonella typhimurium
- Abstracts: Extracellular proteases produced by the Quorn myco-protein fungus Fusarium graminearum in batch and chemostat culture