Microencapsulation of Lactobacillus casei LK-1 by spray drying related to its stability and in vitro digestion

文献类型： 外文期刊

第一作者： Liao, Liang-Kun

作者： Liao, Liang-Kun;Wei, Xiao-Yi;Gong, Xiao;Li, Ji-Hua;Huang, Tao;Xiong, Tao

作者机构：

关键词： Lactobacillus casei;Spray drying;Storage stability;Digestion

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：4.952； 五年影响因子：5.383 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Bacterial viability is a requirement for probiotics in food applications, and retaining a high viability rate is important to ensure its beneficial effects. The study aimed to determine the protective effects of different matrices on microencapsulated Lactobacillus casei LK-1 during spray drying, storage and in vitro digestion. Skim milk, trehalose and maltodextrin were used as protective agents to form different bacterial microcapsules by spray drying. Viability of bacteria in capsules stored at different temperatures (-20, 4, 25 and 37 degrees C) and in capsules with different water activities were studied. The results showed that both storage temperature and water activity had significant influence on viability of L. casei LK-1 and the glass state was necessary but not absolute factors for storage stability. All matrix showed the highest viability when stored at -20 degrees C and with water activity of 0.11. It was found that skim milk endowed L casei LK-1 high viability in either gastric or intestinal juice. In general, skim milk protected L. casei LK-1 better than trehalose and maltodextrin during spray drying, storage and simulated digestion. This study demonstrated that it is important to choose appropriate protective agent to achieve high viability in probiotic application. (C) 2017 Published by Elsevier Ltd.

分类号： TS2

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