期刊
FOOD CHEMISTRY
卷 229, 期 -, 页码 653-662出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.02.146
关键词
Lipid; Digestion; Carotenoids; Emulsions; Bioaccessibility; Particle size
资金
- KU Leuven Research Council by the Flemisch Government [METH/14/03]
- Marie Sklodowska-Curie Action-Individual Fellowships [IF-EF 654924]
- IWT-Vlaanderen [141469]
Carotenoid-enriched oil-in-water emulsions with different droplet sizes (small: d(43) 0.72 mu m; medium: d(43) 1.9 mu m; large: d(43) 15.1 mu m) were subjected to simulated gastrointestinal conditions. The kinetics of lipolysis, micelle formation and carotenoid bioaccessibility were monitored during the intestinal phase. The rates of all three processes increased with decreasing droplet size. The large droplet size emulsion contained undigested oil at the end of digestion, whereas an almost complete hydrolysis was observed for the other two emulsions. The sub-micron emulsion presented a higher conversion of MAGs to FFAs during digestion, which led to a higher concentration of FFAs in the mixed micelles. The incorporation of carotenoids into mixed micelles occurred faster and reached a higher final value for the small droplet size emulsion, leading to final carotenoids bioaccessibility values of around 70%. This work provides valuable information for developing in silica models to simulate the lipid digestibility and carotenoid bioaccessibility. (C) 2017 Elsevier Ltd. All rights reserved.
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