Negro C, Tommasi L, Miceli A
Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università Degli Studi di Lecce, Via per Monteroni, 73100 Lecce, Italy.
Bioresour Technol. 2003 Mar;87(1):41-4. doi: 10.1016/s0960-8524(02)00202-x.
The aims of this work were to determine the amounts of the different classes of phenolic compounds in an ethanolic extract from red grape marc and its components, peels and seeds, and to evaluate their antioxidant activities by the beta-carotene bleaching test for their utilization as natural antioxidants. The results showed that red grape marc was rich in polyphenol compounds with a clear antioxidant activity. The extracts, in fact, at very low concentration (20 ppm) in total phenols showed an antioxidant activity (AA) higher than 43% on average, while at higher concentration (80-160 ppm) all the fractions had an AA comparable to that of butlylated-hydroxytoluene. Grape seeds seemed to give the highest contribution to such AA, as they contained high quantities of proanthocyanidines, a type of flavonoid known for its high antioxidant properties.
这项工作的目的是测定红葡萄渣乙醇提取物及其成分（果皮和种子）中不同类酚类化合物的含量，并通过β-胡萝卜素漂白试验评估其抗氧化活性，以便将其用作天然抗氧化剂。结果表明，红葡萄渣富含具有明显抗氧化活性的多酚化合物。事实上，提取物中总酚浓度非常低（20 ppm）时，平均抗氧化活性（AA）高于43%，而在较高浓度（80 - 160 ppm）时，所有组分的AA与丁基化羟基甲苯相当。葡萄籽似乎对这种AA的贡献最大，因为它们含有大量的原花青素，这是一种以高抗氧化特性而闻名的类黄酮。
