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Articles 1 - 3 of 3
Full-Text Articles in Food Microbiology
Investigation Of Fermentation Efficiency In Saccharomyces Cerevisiae Through Telomere Integrity And Maltase Expression, Dana Bennett
Investigation Of Fermentation Efficiency In Saccharomyces Cerevisiae Through Telomere Integrity And Maltase Expression, Dana Bennett
All Graduate Theses, Dissertations, and Other Capstone Projects
Many microbreweries practice serial fermentation, or serial repitching. Serial repitching is the process by which one yeast culture is reused for multiple batches of beer. Each batch of subsequent beer is called a “pitch.” This technique helps breweries limit production costs. However, fermentation is difficult to predict throughout serial fermentation. This leads to beer quality issues such as fluctuation in alcohol production, buildup of unwanted flavor compounds, and decreased carbon dioxide production, which results in reduced profit. To combat this issue, many breweries will attempt to predict fermentation efficiency through viable cell counting in order to ensure a consistent number …
Metabolic And Morphological Evaluation Of Two Brewer’S Yeast Strains Throughout Serial Re-Pitching In Beer Fermentation, Anh Pham
All Graduate Theses, Dissertations, and Other Capstone Projects
Beer fermentation is the process of growing yeast anaerobically in a malt-based medium, ultimately resulting in alcohol and carbon dioxide production. In order to reduce the cost and waiting time, serial repitching has been practiced among microbrewers. The technique emphasizes transferring yeast from one batch of beer to the subsequent brewing cycles. It has been shown that aged yeast cultures have higher fermentation efficiency and shorter lag period, thereby resulting in shorter fermentation times, faster pH drop, and lower concentrations of unwanted products. Despite the advantages of serial repitching, one can only practice repitching for approximately 5-6 times with a …
Nisin Resistance Of Bacillus Cerus: Preparation Of Nisin, Peter Weber
Nisin Resistance Of Bacillus Cerus: Preparation Of Nisin, Peter Weber
Journal of Undergraduate Research at Minnesota State University, Mankato
Nisin is a peptide that is made by the bacterium Lactococcus lactis. Nisin is a small molecule that kills gram positive bacteria by binding to their membrane and by disrupting the proton motive force. When food is processed it is heated to kill bacteria, but some bacteria still survive. Adding nisin to the food provides a second barrier for the growth of the bacteria. Purified nisin has become quite expensive in the current marketplace. Therefore this study is directed at producing nisin and purifying it. L. lactis was grown in five different media (BHI, BHI + 1% glucose, BHI + …