SCUT-Zhuhai Institute of Modern Industrial Innovation, School of Food Science and Engineering, South China University of Technology, Guangzhou, China.
Centre for Nutrition and Food Sciences, University of Queensland, Brisbane, Australia.
Carbohydr Polym. 2022 Oct 1;293:119721. doi: 10.1016/j.carbpol.2022.119721. Epub 2022 Jun 13.
Linear dextrin aggregates (LDAs) were prepared in the current study as novel material for encapsulating docosahexaenoic acid (DHA). The high amylose corn starch was acid hydrolyzed and enzymically debranched into LDAs of varied chain length distributions (CLDs). Results showed that the encapsulation efficiency of microcapsules significantly increased from 68% to 81% correspondingly with the improved content of the intermediate linear dextrin (degree of polymerization, DP, ranges 10- 100). Meanwhile, the peroxide value was also showed a decrease of 2 mEq/kg during the storage. Molecular dynamic simulations further revealed that the linear dextrin with DP of 15 showed the highest interaction attraction while being encapsulated with DHA. The hypothesis is thus verified since the LDA with a specific CLD favors the formation of starch-based DHA microcapsules with better performance. When LDAs contained 22% intermediate linear dextrin, microcapsules showed the highest encapsulation efficiency (85%) and the lowest peroxide value (10 mEq/kg).
在本研究中，线性糊精聚集体（LDAs）被制备为包封二十二碳六烯酸（DHA）的新型材料。高直链玉米淀粉经酸水解和酶解，得到不同链长分布（CLD）的 LDAs。结果表明，微胶囊的包埋效率从 68%显著提高到 81%，相应地，中间线性糊精的含量增加（聚合度 DP，范围 10-100）。同时，在储存过程中过氧化物值也下降了 2mEq/kg。分子动力学模拟进一步表明，当 DP 为 15 的线性糊精与 DHA 包封时，表现出最高的相互吸引作用。因此，该假设得到了验证，因为具有特定 CLD 的 LDA 有利于形成具有更好性能的基于淀粉的 DHA 微胶囊。当 LDAs 含有 22%的中间线性糊精时，微胶囊表现出最高的包埋效率（85%）和最低的过氧化物值（10mEq/kg）。
