Antioxidant tannins from Rosaceae plant roots |
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Authors: | Jan Oszmianski Aneta Wojdylo Eliza Lamer-Zarawska Katarzyna Swiader |
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Affiliation: | 1. Department of Fruit and Vegetable Processing, University of Agricultural in Wroclaw, ul. Norwida 25, PL-50375 Wroclaw, Poland;2. Department of Pharmaceutical Biology and Botany, University of Medicine, Al. J. Kochanowskiego 10, PL-51601 Wroclaw, Poland |
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Abstract: | Polyphenols were analyzed by HPLC after thioacidolysis of proanthocyanidins polymers and acid hydrolysis of phenolic acid esters. The predominant constitutive units of the procyanidins of Aruncus Silvester and Potentilla alba roots were (−)epicatechin, and Geum rivale and Waldsteinia geoides roots (+)catechin. The highest proanthocyanidin concentrations were found in Potentilla alba roots (close to 80 g/kg) and W. geoides (64 g/kg). Ellagic acid was present at high concentration in G. rivale (2.68 g/kg) and W. geoides (2.75 g/kg) in dried roots. The antioxidant activity, measured by the DPPH method, ranged from 0.72 (Filipendula vulgaris) to 4.40 (W. geoides) mM trolox equivalents/kg dried roots and, measured by the ABTS method, from 1.50 to 6.60 mM trolox equivalents per kg of dried roots. |
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Keywords: | Proanthocyanidins Ellagic acid ABTS DPPH Filipendula vulgaris L Geum rivale L Aruncus Silvester Waldsteinia geoides Potentilla alba L |
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