Radulescu Cristiana, Olteanu Radu Lucian, Buruleanu Claudia Lavinia, Tudorache Mihaela Nechifor, Dulama Ioana Daniela, Stirbescu Raluca Maria, Bucurica Ioan Alin, Stanescu Sorina Geanina, Banica Andreea Laura
Faculty of Sciences and Arts, Valahia University of Targoviste, 13 Sinaia Alley, 130004 Targoviste, Romania.
Doctoral School Chemical Engineering and Biotechnology, National University of Science and Technology Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania.
Antioxidants (Basel). 2024 Sep 19;13(9):1133. doi: 10.3390/antiox13091133.
Due to its valuable organic compounds, grape pomace represents a valuable resource in the creation of value-added food products. In this study, we investigated grape pomace hydroalcoholic extracts obtained by ultrasonication from two white and two red Romanian grape varieties. The phytochemical parameters, i.e., polyphenolics, flavonoids, anthocyanins, condensed tannins content, and antioxidant activity, were determined by UV-Vis spectrometry. The statistical analysis revealed that Tămâioasă Românească and Negru de Drăgășani, respectively, and Fetească Albă and Fetească Neagră are similar to each other. Significant differences among the pomaces obtained from different grape varieties were noticed in terms of their phenolic contents. The red varieties (Fetească Neagră and Negru de Drăgășani) were richest in terms of total phenolics and total anthocyanins, respectively. The antioxidant activity of extracts obtained from grape pomace showed that Negru de Drăgășani had the higher value due to its high amounts of polyphenols, followed by Fetească Neagră, Fetească Albă, and Tămâioasă Românească. Higher levels of bioactive polyphenolic substances, i.e., catechin, myricetin, resveratrol, and vanillic acid, were found in the pomace of Negru de Drăgășani extracts using high-performance liquid chromatography. These results emphasize the potential of the Negru de Drăgășani variety to be further exploited for nutritional and functional applications.
由于其含有宝贵的有机化合物，葡萄皮渣是生产增值食品的宝贵资源。在本研究中，我们调查了通过超声处理从两个罗马尼亚白葡萄品种和两个红葡萄品种中获得的葡萄皮渣水醇提取物。通过紫外可见光谱法测定了植物化学参数，即多酚、黄酮类化合物、花青素、缩合单宁含量和抗氧化活性。统计分析表明，罗马尼亚塔米奥萨纳（Tămâioasă Românească）和德拉格沙尼黑（Negru de Drăgășani），以及白菲特斯卡（Fetească Albă）和黑菲特斯卡（Fetească Neagră）彼此相似。在不同葡萄品种的皮渣中，其酚类含量存在显著差异。红葡萄品种（黑菲特斯卡和德拉格沙尼黑）分别在总酚和总花青素含量方面最为丰富。从葡萄皮渣中获得的提取物的抗氧化活性表明，德拉格沙尼黑由于其高含量的多酚而具有较高的抗氧化活性值，其次是黑菲特斯卡、白菲特斯卡和罗马尼亚塔米奥萨纳。使用高效液相色谱法在德拉格沙尼黑提取物的皮渣中发现了较高水平的生物活性多酚物质，即儿茶素、杨梅素、白藜芦醇和香草酸。这些结果强调了德拉格沙尼黑葡萄品种在营养和功能应用方面进一步开发的潜力。
