Antilisterial activities of polyphenol-rich extracts of grapes and vinification byproducts

dc.contributor.author	Anastasiadi, M	en
dc.contributor.author	Chorianopoulos, NG	en
dc.contributor.author	Nychas, G-JE	en
dc.contributor.author	Karoutounian, SA	en
dc.date.accessioned	2014-06-06T06:49:11Z
dc.date.available	2014-06-06T06:49:11Z
dc.date.issued	2009	en
dc.identifier.issn	00218561	en
dc.identifier.uri	http://dx.doi.org/10.1021/jf8024979	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/4483
dc.subject	Antilisterial activity	en
dc.subject	Food preservation	en
dc.subject	Grape berries	en
dc.subject	Grape pomace	en
dc.subject	Grape seeds	en
dc.subject	Grape stems	en
dc.subject	Total polyphenolic content (TPC)	en
dc.subject.other	Listeria monocytogenes	en
dc.subject.other	Vitaceae	en
dc.subject.other	Vitis vinifera	en
dc.subject.other	flavonoid	en
dc.subject.other	phenol derivative	en
dc.subject.other	plant extract	en
dc.subject.other	polyphenols	en
dc.subject.other	article	en
dc.subject.other	chemistry	en
dc.subject.other	drug effect	en
dc.subject.other	food industry	en
dc.subject.other	grape	en
dc.subject.other	Listeria monocytogenes	en
dc.subject.other	plant seed	en
dc.subject.other	plant stem	en
dc.subject.other	Flavonoids	en
dc.subject.other	Food Industry	en
dc.subject.other	Listeria monocytogenes	en
dc.subject.other	Phenols	en
dc.subject.other	Plant Extracts	en
dc.subject.other	Plant Stems	en
dc.subject.other	Seeds	en
dc.subject.other	Vitis	en
dc.title	Antilisterial activities of polyphenol-rich extracts of grapes and vinification byproducts	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/jf8024979	en
heal.publicationDate	2009	en
heal.abstract	The quantitation of the main polyphenols and the assessment of the total polyphenolic content (TPC) in polyphenol-rich extracts of grape berries and vinification byproducts, obtained from Vitis vinifera cultivars of the Greek islands, are presented. The results indicated that seed extracts contain high concentrations of flavan-3-ols and their derivatives, whereas pomace and stem extracts consist of significant amounts of flavonoids, stilbenes, and phenolic acids. In particular, stems-a scarcely studied class of grape byproduct-were also characterized by high frans-resveratrol and e-viniferin content. The evaluation of their in vitro antilisterial activities revealed as most potent the seed and stem extracts of the red variety Mandilaria. Their minimum inhibitory concentrations (MICs) were assessed using a Malthus apparatus by two methods, a plate count technique and an automated technique that combines the conductance measurements with the common dilution method. The results revealed the usefulness of the conductance method as an alternative rapid means for the MIC estimation, whereas the respective values (0.26 and 0.34 for seeds and stems) indicated that both extracts represent an inexpensive source of potent natural antilisterial mixtures, which may be incorporated in food systems to prevent the growth of Listeria monocytogenes. © 2009 American Chemical Society.	en
heal.journalName	Journal of Agricultural and Food Chemistry	en
dc.identifier.issue	2	en
dc.identifier.volume	57	en
dc.identifier.doi	10.1021/jf8024979	en
dc.identifier.spage	457	en
dc.identifier.epage	463	en