Influence of Wine Composition on the Heat Resistance of Potential Spoilage Organisms

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Abstract
Pasteurization studies were conducted on 29 yeasts and five lactic acid bacteria. In general the yeasts were more heat resistant in wine than were the bacteria. The one exception was a strain of Lactobacillus fructivorans that gave an average D-value of 1.7 min at 60 C. Alcohol was the wine constituent that had the greatest effect on resistance; D-values for all test species were inversely related to the ethanol concentration. The response of organisms to other factors such as pH, sugar, and sulfur dioxide varied with the species.

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