Antimicrobial effects of wine: separating the role of polyphenols, pH, ethanol, and other wine components

Journal of Food Science
Nataša BobanMladen Boban

Abstract

While the antimicrobial effectiveness of wine is well documented, relative contributions of the wine components to its antimicrobial activity is controversial. To separate the role of wine phenolics, ethanol, and pH from other wine constituents, the antimicrobial effects of intact wine were compared to that of phenols-stripped wine, dealcoholized wine, ethanol, and low pH applied separately and in combination, against 2 common foodborne pathogens, Salmonella enterica serovar Enteritidis and Escherichia coli. All samples were biochemically characterized with respect to their total phenolics and resveratrol content, antioxidant capacity, ethanol content, and pH. Antioxidative activity of the samples corresponded to their total phenolics content. Except for respective controls, pH and ethanol content were similar in all samples. The order of antibacterial activity of the samples was: intact wine > phenols-stripped wine > dealcoholized wine > combination of ethanol and low pH > low pH > ethanol. Separate application of ethanol or low pH showed negligible antibacterial activity while their combination showed synergistic effect. Antibacterial activity of the samples could not be related to their total phenolics and resveratrol conten...Continue Reading

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Citations

Mar 16, 2012·Journal of Food Science·Gian Carlo TenoreEttore Novellino
Jul 11, 2014·Redox Biology·Fiorella BiasiGiuseppe Poli
Sep 26, 2020·Journal of Food Protection·Masayuki TakahashiNobuhiko Mukai
Dec 3, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tomasz TarkoAgata Soszka

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