PDF(Pubmed)
Abstract：
Both grape pomace and whey are waste products from the food industry that are rich in valuable ingredients. The utilization of these two by-products is becoming increasingly possible as consumer awareness of upcycling increases. The biological activities of grape pomace extract (GPE) are diverse and depend on its bioavailability, which is influenced by processes in the digestive system. In this work, goat whey protein (GW) was used as the primary coating to protect the phenolic compounds of GPE during the spray drying process. In addition, trehalose (T), sucrose (S), xylose (X), and maltodextrin (MD) were added to the goat whey proteins as co-coatings and protein stabilizers. All spray drying experiments resulted in microcapsules (MC) with a high encapsulation efficiency (77.6-95.5%) and yield (91.5-99.0%) and almost 100% recovery of phenolic compounds during the release test. For o-coumaric acid, the GW-coated microcapsules (MC) showed a bioavailability index of up to 731.23%. A semi-crystalline structure and hydrophilicity were characteristics of the MC coated with 10% T, S, X, or 5% MD. GW alone or in combination with T, S, MD, or X proved to be a promising carrier for polyphenols from grape pomace extract and ensured good bioavailability of these natural antioxidants.
摘要：
葡萄果渣和乳清都是食品行业的废品，富含有价值的成分。随着消费者对升级循环意识的提高，这两种副产品的利用变得越来越可能。葡萄果渣提取物（GPE）的生物活性是多样的，取决于其生物利用度，这受到消化系统过程的影响。在这项工作中,在喷雾干燥过程中，山羊乳清蛋白（GW）用作主要涂层，以保护GPE的酚类化合物。此外,海藻糖(T),蔗糖（S），木糖(X),将麦芽糊精(MD)作为共涂层和蛋白质稳定剂添加到山羊乳清蛋白中。所有喷雾干燥实验均产生微胶囊（MC），其具有高的包封效率（77.6-95.5％）和产率（91.5-99.0％），并且在释放测试期间酚类化合物的回收率几乎为100％。对于邻香豆酸，GW包衣微胶囊（MC）的生物利用度指数高达731.23％。半结晶结构和亲水性是涂有10％T的MC的特征，S,X,或5%MD。GW单独或与T组合，S,MD,或X被证明是葡萄果渣提取物多酚的有前途的载体，并确保了这些天然抗氧化剂的良好生物利用度。
