文章基本信息

标题：Physicochemical properties and enzymatic activity of wheat germ extract microencapsulated with spray and freeze drying
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作者：Fahimeh Jamdar ; Seyed Ali Mortazavi ; Mohammad Reza Saiedi Asl 等
期刊名称：Food Science & Nutrition
电子版ISSN：2048-7177
出版年度：2021
卷号：9
期号：2
页码：1192-1201
DOI：10.1002/fsn3.2104
出版社：John Wiley & Sons, Ltd.
摘要：Wheat germ is produced as a by‐product during wheat milling operations and is a relatively inexpensive protein source that, in spite of its exclusive nutritional properties, is mostly used for animal feed formulation and has limited use in the food industry. In this study, wheat germ extract (WGE) was microencapsulated by spray and freeze drying and with different ratios of maltodextrin to whey protein concentrate (M‐W) as the coating material and then physicochemical properties of the microcapsules were evaluated. Results showed decreased moisture content and increased solubility, lipase activity, acid phosphatase activity, and both lipase and acid phosphatase microencapsulation efficiency with increasing M‐W ratios in both drying methods. The M‐W ratios had no significant effects on the DPPH free radical scavenging activity in both methods. With increasing M‐W ratios, particle size decreased and bulk density increased in the spray drying method, while particle size increased and bulk density decreased in the freeze drying method. Spray drying elevated solubility, DPPH free radical scavenging activity, lipase activity, acid phosphatase activity, and both lipase and acid phosphatase microencapsulation efficiency, in comparison with the freeze drying method.
关键词：DPPH free radical scavenging activity;maltodextrin;microencapsulation;wheat germ;whey protein concentrate