Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 85, Issue -, Pages 232-239Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.lwt.2017.07.028
Keywords
Antioxidants; Stability; Encapsulation; Functional foods; Protein models
Categories
Funding
- School of Science, Monash University Malaysia
- MyBrain 15
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The antioxidant catechin is astringent in taste, sparingly soluble in water and sensitive to oxygen, light and pH. These properties can restrict its application in food products. The present study investigated the effect of pH, relative humidity (RH) and various food components on this polyphenol's antioxidant stability, before and after encapsulation by beta cyclodextrin ((beta-CD) and by some alkylated beta-CD derivatives. Catechin was observed to be very sensitive to pH (alkaline) and high relative humidity (>65%) but there was relatively little loss of antioxidant activity (61% antioxidant retention) for cyclodextrin inclusion complexes (ICs) under these conditions. Interestingly, free catechin degraded dramatically in a 40% protein model compared to a sugar or oil model, but this degradation was significantly retarded by beta-CD complexation. These results suggest that protection of antioxidants and other sensitive components by beta-CD encapsulation may have applications in functional foods and health supplements. (C) 2017 Elsevier Ltd. All rights reserved.
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