期刊
FOOD CHEMISTRY
卷 188, 期 -, 页码 256-263出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2015.05.005
关键词
Nanoemulsions; Vitamin E; Whey protein isolate; Gum arabic; Orange oil; Stability
资金
- Cooperative State Research, Extension, Education Service, United State Department of Agriculture, Massachusetts Agricultural Experiment Station [831]
- United States Department of Agriculture, NRI [2011-03539, 2013-03795, 2011-67021, 2014-67021]
- Turkish government
- TUBITAK [2214-A]
Natural biopolymers, whey protein isolate (WPI) and gum arabic (GA), were used to fabricate emulsion-based delivery systems for vitamin E-acetate. Stable delivery systems could be formed when vitamin E-acetate was mixed with sufficient orange oil prior to high pressure homogenization. WPI (d(32) = 0.11 mu m, 1% emulsifier) was better than GA (d(32) = 0.38 mu m, 10% emulsifier) at producing small droplets at low emulsifier concentrations. However, WPI-stabilized nanoemulsions were unstable to flocculation near the protein isoelectric point (pH 5.0), at high ionic strength (>100 mM), and at elevated temperatures (>60 degrees C), whereas GA-gtabilized emulsions were stable. This difference was attributed to differences in emulsifier stabilization mechanisms: WPI by electrostatic repulsion; GA by steric repulsion. These results provide useful information about the emulsifying and stabilizing capacities of natural biopolymers for forming food-grade vitamin-enriched delivery systems. (C) 2015 Elsevier Ltd. All rights reserved.
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