Phenolic Composition of Grape Stems from Different Spanish Varieties and Vintages.

ABSTRACT: Grape stems are a by-product from the wine industry that has been underused to date despite having great potential for the agro-food and cosmetic industries. The aim of the present work was to characterize grape stem extracts obtained from different grape varieties from two vintages (2016 and 2018). Both spectrophotometric and chromatographic methods were used for sample characterization. The results showed that there exist significant differences in antioxidant activity, total phenolic content (TPC) and total flavonoid content (TF) among grape stems from different varieties in each vintage and from different vintage for the same variety. Catechin was the most abundant phenolic compound in all extracts from both vintages. In general, Mazuelo presented higher concentration values of the dif

SUBMITTER: Esparza I 

PROVIDER: S-EPMC8392641 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature