Crop thinning is a common practice performed in the vineyard consisting of whole clusters or individual fruits being removed after flowering is attained. Current studies have reported that unripe grape products as verjuice and sour grape sauce contain high content of bioactive compounds such as polyphenols, sugars, organic acids, nitrogenous compounds and sterols. This mini-review overviewed the bioactive components obtained from thinned unripe grapes such as phenolic compounds, sugars, organic acids, minerals, nitrogen compounds and sterols, and their use as antibrowning and whitening agents, natural catalysts, food preservative and food additive. In addition, their beneficial effects for human health also were reviewed, as well as the practices to maximize the extraction of antioxidant compounds. Therefore, revalorizing the waste from this management practice in viticulture can increase the vineyard sustainability and farmers' economic profits. © 2021 Society of Chemical Industry

中文翻译：

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葡萄栽培中稀疏簇的潜在机会：一个小评论

间伐是葡萄园中的常见做法，包括在开花后去除整串或单个果实。目前的研究表明，未成熟的葡萄制品如苦艾汁和酸葡萄酱含有高含量的生物活性化合物，如多酚、糖类、有机酸、含氮化合物和甾醇。这篇小型综述概述了从稀释的未成熟葡萄中提取的生物活性成分，如酚类化合物、糖类、有机酸、矿物质、氮化合物和甾醇，以及它们作为抗褐变和增白剂、天然催化剂、食品防腐剂和食品添加剂的用途。此外，还审查了它们对人类健康的有益影响，以及最大限度地提取抗氧化化合物的做法。所以，重新评估葡萄栽培中这种管理实践产生的废物可以提高葡萄园的可持续性和农民的经济利润。© 2021 化学工业协会