Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, Via Amendola165, 70126 Bari, Italy.
Chemistry Department, University of Bari Aldo Moro, Via Orabona 4, 70125 Bari, Italy.
Molecules. 2023 Apr 27;28(9):3760. doi: 10.3390/molecules28093760.
Agronomic practices and the winemaking process lead to the production of considerable quantities of waste and by-products. These are often considered waste with negative effects on environmental sustainability. However, vine shoots and grape stalks can be reused, representing a potential source of xylo-oligosaccharides and polyphenols. In this context, the purpose of this work was to obtain enriched extracts using three different autohydrolysis treatments with (i) HO, (ii) HO:EtOH, and (iii) HO:Amberlyst. The obtained extracts were characterized by their xylo-oligosaccharide and polyphenol profiles using LC-MS techniques. The use of ethanol during autohydrolysis allowed for greater extraction of xylan-class compounds, especially in vine shoot samples, while an increase in antioxidant activity (128.04 and 425.66 µmol TE/g for ABTS and DPPH, respectively) and in total phenol content (90.92 mg GAE/g) was obtained for grape stalks.
农艺措施和酿酒过程导致产生大量的废物和副产品。这些通常被认为是对环境可持续性有负面影响的废物。然而，葡萄藤嫩枝和葡萄茎可以再利用，代表了木二糖寡糖和多酚的潜在来源。在这种情况下，这项工作的目的是使用三种不同的自水解处理（i）HO、（ii）HO:EtOH 和（iii）HO:Amberlyst 获得富含提取物。使用 LC-MS 技术对获得的提取物的木二糖寡糖和多酚谱进行了表征。在自水解过程中使用乙醇可以更好地提取木聚糖类化合物，特别是在葡萄藤嫩枝样品中，而对于葡萄茎，抗氧化活性（ABTS 和 DPPH 分别为 128.04 和 425.66 µmol TE/g）和总酚含量（90.92 mg GAE/g）均有所增加。
