The aim of this study was to assess the phenolic composition and nutraceutical potential of tinctures from fruits in two stages\r\nof maturity (F3, younger; F25, older), green husks (GH), and leaves (L) of Juglans regia L. In all extracts gallic, protocatechuic,\r\n3-caffeoylquinic, 3-??-coumaroylquinic, 4-caffeoylquinic, 4-??-coumaroylquinic, and ??-coumaric acids and quercetin-3-Odeoxyhexoside\r\nwere detected using UPLC-MS technique. Caffeic acid hexoside I and quercetin-3-O-deoxyhexoside I have been\r\nidentified in GH tincture. The highest ability to chelate Fe2+ was observed for GH tincture (EC50 = 71.01 Ã?± 3.55mg FM/mL),\r\nwhereas the lowest was observed (EC50 = 131.06 Ã?± 6.55mg FM/mL) for F3 tincture. The highest reducing power was found for\r\nF3 and F25 (EC50 = 32.47 Ã?± 1.53 and 36.07 Ã?± 1.72mg FM/mL, resp.). Ability of tinctures to prevent lipids against oxidation was\r\nrelatively low. The highest activity (EC50 = 126.49 Ã?± 6.32mg FM/mL) was determined for F25. Tested tinctures showed relatively\r\nhigh antiradical activityââ?¬â?EC50 values ranged from 100.56Ã?±5.03 to 129.04Ã?±6.45mg FM/mL for L and F25, respectively.The results\r\nobtained suggest that J. regia can be a source of bioactive compounds with antioxidant properties.
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