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Identifying Major Drivers of Antioxidant Activities in Complex Polyphenol Mixtures from Grape Canes

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Ferrier, Manon | Billet, Kévin | Drouet, Samantha | Tungmunnithum, Duangjai | Malinowska, Magdalena Anna | Marchal, Cécile | Dedet, Sandrine | Giglioli-Guivarc’h, Nathalie | Hano, Christophe | Lanoue, Arnaud

Edité par CCSD ; MDPI -

International audience. Grape canes represent a valuable source of numerous polyphenols with antioxidant properties, whose compositions vary depending on the genotype and environmental factors. Antioxidant activities of pure molecules are often reported without considering possible interactions that may occur in complex polyphenol mixture. Using UPLC-MS-based metabolomics and unsupervised classification, we explored the polyphenol variations in grape cane extracts from a collection of European varieties. Antioxidant activities were assessed using ORAC, ABTS, DPPH, FRAP, CUPRAC and chelation assays. Pairwise correlations between polyphenols and antioxidant capacities were performed to identify molecules that contributed more to the antioxidant capacities within a complex mixture of polyphenols.

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