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• W1451566502 abstract "Grape seeds and skin are by-products of wine making or juice making operations which are considered as a good source of bioactive compounds. In this study, the total phenolic content (TPC) from Vitis vinifera L. cv. Ahmar Bou-Amar seeds and skin was optimized by conventional solvent extraction (CSE) and microwave-assisted extraction (MAE) using response surface methodology (RSM), then a comparative study was carried out. The optimal conditions for seeds extracted by CSE were: 74.33% v/v of ethanol concentration, 65.23 min extraction time, 0.1 g/70.86 ml solid/liquid ratio, and for those extracted by MAE were: 59.88 s irradiation time and 373.15 W microwave power. The extract obtained under these conditions showed a TPC of 96.56 ± 1.29 mg GAE/g and 73.15 ± 0.20 mg GAE/g DW for CSE and MAE, respectively. Concerning skin, the optimal conditions for CSE were: 51.46% v/v of acetone concentration, 89.80 min extraction time, 0.1 g/32.25 ml solid/liquid ratio and for MAE were: 113.74 s irradiation time and 384.44 W microwave power. The extract obtained under these conditions showed a TPC of 39.57 ± 0.23 mg GAE/g and 54.84 ± 0.41 mg GAE/g DW for CSE and MAE, respectively. The TPC of seeds extract obtained with MAE was 24% lower than that of the CSE extract; also, the antioxidant activity of CSE extract is better than that of MAE extract. While, the TPC of skin extract obtained with MAE was 28% higher than that of the CSE extract and the antioxidant capacity was significantly higher than that of the CSE extract. The results indicate that the extracts of cv. Ahmar Bou-Amar seeds and skin contain a high quantity of polyphenols; therefore, they can be considered as a good source of natural antioxidants." @default.
• W1451566502 created "2016-06-24" @default.
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• W1451566502 date "2015-12-01" @default.
• W1451566502 modified "2023-10-17" @default.
• W1451566502 title "Optimization of the recovery of phenolic compounds from Algerian grape by-products" @default.
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• W1451566502 doi "https://doi.org/10.1016/j.indcrop.2015.08.039" @default.
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