title: Characterization of polyphenols and antioxidant potential of white grape pomace byproducts (Vitis vinifera L.).
abstract: A detailed assessment of the total phenolic and total tannin contents, the monomeric and oligomeric flavan-3-ol composition, the proanthocyanidin profile, and the antioxidant potential of the grape pomace byproducts (considered as a whole, both skins and seeds), derived from four white grape varieties (Vitis vinifera L.), was performed. Significant differences (p < 0.05) of the total phenolic content, total tannin content, and antioxidant capacity of grape pomace byproducts were observed among the different grape varieties studied. For the first time in the literature, the particular flavan-3-ol composition of the four grape varieties investigated was described for the whole fraction of their grape pomace byproducts. The phenolic composition and antioxidant capacity of grape pomaces were compared to those of their corresponding stems. The global characterization of these white grape varieties provided a basis for an integrated exploitation of both winemaking byproducts as potential, inexpensive, and easily available sources of bioactive compounds for the pharmaceutical, cosmetic, and food industries.
authors.affiliation: Department of Chemistry, University of the Balearic Islands , Crta Valldemossa, Km 7.5, 07122 Palma de Mallorca, Spain.
authors.forename: María Reyes
authors.initials: MR
authors.lastname: González-Centeno
authors.forename: Michael
authors.initials: M
authors.lastname: Jourdes
authors.forename: Antoni
authors.initials: A
authors.lastname: Femenia
authors.forename: Susana
authors.initials: S
authors.lastname: Simal
authors.forename: Carmen
authors.initials: C
authors.lastname: Rosselló
authors.forename: Pierre-Louis
authors.initials: PL
authors.lastname: Teissedre
mesh_terms: D000975:Antioxidants / Q000494:pharmacology*; D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis; D005511:Food Handling; D059808:Polyphenols / Q000494:pharmacology*; D044945:Proanthocyanidins / Q000032:analysis; D013634:Tannins / Q000032:analysis; D027843:Vitis / Q000737:chemistry*; D014920:Wine
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D059808:Polyphenols; D044945:Proanthocyanidins; D013634:Tannins; C013221:proanthocyanidin; C404987:flavan-3-ol