期刊
FOOD HYDROCOLLOIDS
卷 44, 期 -, 页码 380-389出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2014.10.013
关键词
Nanoemulsions; Emulsions; Hydrogels; Nutraceuticals; beta-carotene; Delivery system
资金
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [NRF-2012R1A1A3014907]
- United States Department of Agriculture, NRI Grants [2011-03539, 2013-03795]
The aim of this study was to prepare starch-based filled hydrogels fortified with a model lipophilic nutraceutical (beta-carotene) and determine the influence of starch type (mung bean or rice starch) and surfactant type (whey protein isolate (WPI) or Tween 20 (T20)) on lipid digestibility and beta-carotene bioaccessibility. Microstructure, lipid digestion, and beta-carotene bioaccessibility were measured as the emulsions and filled hydrogels were passed through a simulated gastrointestinal tract that included oral, gastric, and intestinal phases. The bioaccessibility was defined as the fraction of b-carotene solubilized within the mixed micelle phase after lipid digestion. Non-encapsulated T20-stabilized emulsions had better aggregation stability than WPI-stabilized emulsions under simulated gastrointestinal conditions, which led to a higher beta-carotene bioaccessibility. Both Tween 20- and WPI-stabilized emulsions incorporated in starch-based filled hydrogels led to high lipid digestion and beta-carotene bioaccessibility. The release behavior of free fatty acids during lipase digestion depended on the type of starch used as a hydrogel matrix, which was attributed to differences in starch structure. The information obtained in this study may be useful for the fortification of starch-based gelled products with lipophilic nutraceuticals. (C) 2014 Elsevier Ltd. All rights reserved.
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