PDF(Pubmed)
Abstract：
Walnuts play a positive role in human health due to their large amounts of unsaturated fatty acids, whereas lipid oxidation can easily occur during storage. Herein, three natural antioxidants (epicatechin, sesamol, and myricetin) were added to the composite film cross-linked with chitosan and soy protein peptide, and the antioxidant film appropriate for the preservation of walnut kernels from Juglans sigillata was screened to improve the storage quality of walnuts. The results showed that three antioxidant films could all enhance the storage performance of walnut kernels, with sesamol being the best. The characterization of antioxidant film cross-linked with chitosan and soy protein peptide containing sesamol (C/S-ses film) revealed that the composite film improved the slow release and stability of sesamol; in addition, the presence of sesamol could effectively reduce the light transmittance and water vapor permeability of the composite film, together with significantly enhancing the antioxidant and antimicrobial activities, resulting in an effective prolongation of the storage period of walnut kernels. These findings indicated that C/S-ses possess excellent potential for retarding the oxidative rancidity of unsaturated fatty acids and will provide an effective strategy for the preservation of walnut kernels.
摘要：
核桃由于含有大量的不饱和脂肪酸，对人体健康具有积极作用，而脂质氧化在储存过程中很容易发生。在这里，三种天然抗氧化剂（表儿茶素，芝麻酚,和杨梅素）被添加到与壳聚糖和大豆蛋白肽交联的复合膜中，筛选适合核桃果仁保鲜的抗氧化膜，以提高核桃的贮藏品质。结果表明,3种抗氧化膜均能提高核桃仁的贮藏性能,芝麻酚是最好的。壳聚糖与含芝麻酚大豆蛋白肽交联的抗氧化膜(C/S-ses膜)的表征表明,该复合膜提高了芝麻酚的缓释性和稳定性;芝麻酚的存在可以有效降低复合膜的透光率和水蒸气透过率，同时显着增强抗氧化和抗菌活性，有效延长了核桃仁的储存期。这些发现表明，C/S-ses具有出色的延缓不饱和脂肪酸氧化酸败的潜力，并将为保存核桃仁提供有效的策略。
