CERELA   05438
CENTRO DE REFERENCIA PARA LACTOBACILOS
Unidad Ejecutora - UE
artículos
Título:
Growth Parameter and Viability Modifications
Autor/es:
RODRIGUEZ VAQUERO M. J; MANCA DE NADRA M. C.
Revista:
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
Referencias:
Año: 2008
ISSN:
0273-2289
Resumen:
Abstract The anti-bacterial effect of pure non-flavonoids gallic, vanillic, protocatechuic, and caffeic acids and flavonoids quercetin, rutin, and catechin and the effect of total polyphenols of three Argentinean wine varieties, Cabernet Sauvignon, Malbec, and Merlot, against Escherichia coli, microorganism frequently detected in fresh and processed foods, was investigated. The hydroxycinnamic derivate caffeic acid and the flavonoid quercetin were the more effective against E. coli. The polyphenol effect was ethanol independent. The E. coli decimal reduction times were 2.9, 2.1, and 0.65 h for Malbec wine and 2.8, 2.3, and 0.64 h for Merlot wine with respect to 1×, 2×, and 4× concentrated wine samples, respectively. For Cabernet Sauvignon wine, the values were 6.3, 3.7, and 1.28 h for 1×, 2×, and 4× concentrated samples, respectively. With clarified wines, the decimal reduction times were higher with values ranging from 15 to 18.4 h in the wine samples. So the phenolic compounds present in red wines could be considered as an interesting alternative to be used as natural preservative against pathogenic microorganisms.The anti-bacterial effect of pure non-flavonoids gallic, vanillic, protocatechuic, and caffeic acids and flavonoids quercetin, rutin, and catechin and the effect of total polyphenols of three Argentinean wine varieties, Cabernet Sauvignon, Malbec, and Merlot, against Escherichia coli, microorganism frequently detected in fresh and processed foods, was investigated. The hydroxycinnamic derivate caffeic acid and the flavonoid quercetin were the more effective against E. coli. The polyphenol effect was ethanol independent. The E. coli decimal reduction times were 2.9, 2.1, and 0.65 h for Malbec wine and 2.8, 2.3, and 0.64 h for Merlot wine with respect to 1×, 2×, and 4× concentrated wine samples, respectively. For Cabernet Sauvignon wine, the values were 6.3, 3.7, and 1.28 h for 1×, 2×, and 4× concentrated samples, respectively. With clarified wines, the decimal reduction times were higher with values ranging from 15 to 18.4 h in the wine samples. So the phenolic compounds present in red wines could be considered as an interesting alternative to be used as natural preservative against pathogenic microorganisms.Escherichia coli, microorganism frequently detected in fresh and processed foods, was investigated. The hydroxycinnamic derivate caffeic acid and the flavonoid quercetin were the more effective against E. coli. The polyphenol effect was ethanol independent. The E. coli decimal reduction times were 2.9, 2.1, and 0.65 h for Malbec wine and 2.8, 2.3, and 0.64 h for Merlot wine with respect to 1×, 2×, and 4× concentrated wine samples, respectively. For Cabernet Sauvignon wine, the values were 6.3, 3.7, and 1.28 h for 1×, 2×, and 4× concentrated samples, respectively. With clarified wines, the decimal reduction times were higher with values ranging from 15 to 18.4 h in the wine samples. So the phenolic compounds present in red wines could be considered as an interesting alternative to be used as natural preservative against pathogenic microorganisms.E. coli. The polyphenol effect was ethanol independent. The E. coli decimal reduction times were 2.9, 2.1, and 0.65 h for Malbec wine and 2.8, 2.3, and 0.64 h for Merlot wine with respect to 1×, 2×, and 4× concentrated wine samples, respectively. For Cabernet Sauvignon wine, the values were 6.3, 3.7, and 1.28 h for 1×, 2×, and 4× concentrated samples, respectively. With clarified wines, the decimal reduction times were higher with values ranging from 15 to 18.4 h in the wine samples. So the phenolic compounds present in red wines could be considered as an interesting alternative to be used as natural preservative against pathogenic microorganisms.E. coli decimal reduction times were 2.9, 2.1, and 0.65 h for Malbec wine and 2.8, 2.3, and 0.64 h for Merlot wine with respect to 1×, 2×, and 4× concentrated wine samples, respectively. For Cabernet Sauvignon wine, the values were 6.3, 3.7, and 1.28 h for 1×, 2×, and 4× concentrated samples, respectively. With clarified wines, the decimal reduction times were higher with values ranging from 15 to 18.4 h in the wine samples. So the phenolic compounds present in red wines could be considered as an interesting alternative to be used as natural preservative against pathogenic microorganisms.
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