This study investigated the antioxidant activity and phenolic composition of seed extracts from three grape cultivars grown in Iran. Folin Ciocalteu method was used for the determination of the total phenolic contents and GC-MS was used for the analysis of phenolic compositions. 1,1-diphenyl-2-picrylhydrazyl (DPPH) method was used to evaluate the antioxidant activity. The highest and the lowest total phenolic contents of seed extract were found in the black and green grape, respectively. The content of individual phenols such as Frulic acid, Gentistic acid, Syringic acid, (+) Catechin, Chlorogenic acid and (-)- Epicatchin gallate was cultivars dependent. The antioxidant activity of the seed extracts ranged from 34.03% (Green) to 53.63% (Black). Generally, the Black grape seed extract with the total phenolic content (3 ± 0.01 mg tannic acid/g DM), DPPH (53.63 ± 0.34%), IC50 and AEAC (7.41 and 16.92 mg/mL) showed the highest level of total antioxidant capacity.

译文

:这项研究调查了伊朗种植的三种葡萄品种的种子提取物的抗氧化活性和酚类成分。使用Folin Ciocalteu方法测定总酚含量,使用GC-MS分析酚组成。 1,1-二苯基-2-吡啶并肼基(DPPH)方法用于评估其抗氧化活性。黑葡萄和绿葡萄中种子提取物的总酚含量最高和最低。诸如果酸,龙胆酸,丁香酸,()儿茶素,绿原酸和(-)-表甜茶素没食子酸酯的各个酚的含量取决于栽培品种。种子提取物的抗氧化活性为34.03%(绿色)至53.63%(黑色)。通常,总酚含量(3±0.01 mg鞣酸/ g DM),DPPH(53.63±0.34%),IC50和AEAC(7.41和16.92 mg / mL)的黑葡萄籽提取物显示出最高的总抗氧化剂水平容量。

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