Abstract Dairy proteins are being used as carrier materials for the co-encapsulation and protection of bioactive nutrients because of their emulsification and complexation with polysaccharides. In this study, whey protein isolate (WPI)-propolis and WPI-propolis-alginate complex particles were fabricated at pH 7.0 and characterised in term of size distribution, ζ-potential, antioxidant activity, and propolis encapsulation. The encapsulation efficiency of propolis was above 80% when 5 mg mL-1 WPI was incorporated. Propolis and α-tocopherol were further co-encapsulated in sunflower oil emulsions stabilised by the complex particles. About 92% α-tocopherol and 72% propolis were co-encapsulated in the inner oil phase and the oil-water interface of emulsions, respectively. Propolis and/or alginate improved the stability of α-tocopherol during storage, while sodium alginate counteracted the positive effect of propolis on the vitamin stability during enzymatic hydrolysis. The data gathered here would expand the use of biopolymer-stabilised emulsions for multi-nutraceutical delivery.

中文翻译：

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用于稳定含 α-生育酚乳液的乳清蛋白分离物-蜂胶-海藻酸盐复合颗粒的制备和表征

摘要 乳蛋白因其与多糖的乳化和复合作用而被用作共包封和保护生物活性营养素的载体材料。在这项研究中，乳清蛋白分离物 (WPI)-蜂胶和 WPI-蜂胶-海藻酸盐复合颗粒在 pH 7.0 下制造，并在尺寸分布、ζ 电位、抗氧化活性和蜂胶封装方面进行表征。当掺入 5 mg mL-1 WPI 时，蜂胶的包封率在 80% 以上。蜂胶和α-生育酚进一步共包封在由复合颗粒稳定的向日葵油乳液中。大约 92% 的 α-生育酚和 72% 的蜂胶分别共封装在乳液的内油相和油水界面中。蜂胶和/或藻酸盐提高了 α-生育酚在储存过程中的稳定性，而海藻酸钠抵消了蜂胶对酶水解过程中维生素稳定性的积极影响。此处收集的数据将扩大生物聚合物稳定乳液在多种营养保健品中的应用。