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• W3040983732 endingPage "127521" @default.
• W3040983732 startingPage "127521" @default.
• W3040983732 abstract "• Optimization of chestnut shells extraction using response surface methodology. • Subcritical water extraction is a clean method for antioxidants extraction. • Optimum extraction conditions: temperature 220 °C and extraction time 30 min. • Caffeoylquinic acid isomers were the main phenolic compounds. The objective of this study was to evaluate the optimal Subcritical Water Extraction (SWE) conditions of antioxidants and polyphenols from chestnut shells using Response Surface Methodology (RSM). A central composite design (CCD) was conducted to analyse the time (6–30 min) and temperature (51–249 °C) effects in antioxidant activity (ABTS, DPPH and FRAP) and Total Phenolic Compounds (TPC). TPC ranged from 315.21 to 496.80 mg gallic acid equivalents (GAE)/g DW; the DPPH from 549.23 to 1125.68 mg Trolox equivalents (TE)/g DW; ABTS varied between 631.16 and 965.45 mg ascorbic acid equivalents (AAE)/g DW and FRAP from 2793.95 to 11393.97 mg ferrous sulphate equivalents (FSE)/g DW. The optimal extraction conditions were 30 min/220 °C, revealing excelling scavenging efficiencies against HOCl (IC 50 = 0.79 µg/mL) and O 2 − (IC 50 = 12.92 µg/mL) without toxicity on intestinal cells (0.1 µg/mL). The phenolic composition revealed high amounts of pyrogallol and protocatechuic acid. SWE can be a useful extraction technique for the recovery of polyphenolics from chestnut shells." @default.
• W3040983732 created "2020-07-16" @default.
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• W3040983732 date "2021-01-01" @default.
• W3040983732 modified "2023-10-18" @default.
• W3040983732 title "Optimizing the extraction of phenolic antioxidants from chestnut shells by subcritical water extraction using response surface methodology" @default.
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• W3040983732 doi "https://doi.org/10.1016/j.foodchem.2020.127521" @default.
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