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Corn starch systems as carriers for yerba mate (Ilex paraguariensis) antioxidants: Effect of mineral addition

Paper ID Volume ID Publish Year Pages File Format Full-Text
18895 43037 2015 11 PDF Available
Title
Corn starch systems as carriers for yerba mate (Ilex paraguariensis) antioxidants: Effect of mineral addition
Abstract

•Corn starch was treated by high hydrostatic pressure to increase its binding sites.•The incorporation of compounds before or after high pressure treatment was analyzed.•Natural antioxidants and minerals salts were highly loaded in starch carriers.

Corn starch is considered a good vehicle for delivering bioactive compounds such as supplements or health promoting additives. The ability of starch treated by high hydrostatic pressure (HHP) to bind and carry zinc and magnesium salts and natural antioxidants of yerba mate (Ilex paraguariensis) extracts was tested. A uniform distribution of the minerals on the surface of starch granules was observed by SEM–EDX and significantly higher amounts of minerals were loaded by HHP treated starches. Calorimetric analysis showed the effect of both HHP treatment and the active compounds addition, while crystal fraction was determined by X-ray diffraction, denoting the presence of minerals in the starch granule. It was found that the type of starch carrier did not affect total polyphenol loading. Besides, HPLC analysis showed that the relative composition of polyphenols from yerba mate extract was maintained. These results support the use of HHP treated corn starch as an alternative carrier for molecules of nutritional interest into food systems.

Keywords
Starch; High hydrostatic pressure; Minerals; Natural antioxidants
First Page Preview
Corn starch systems as carriers for yerba mate (Ilex paraguariensis) antioxidants: Effect of mineral addition
Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 94, April 2015, Pages 39–49
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering