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Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
Physicochemical, pasting, crystallinity, and morphological properties of starches isolated from maize kernels
Ricardo Tadeu Paraginski1, Rosana Colussi2, Alvaro Renato Guerra Dias2
1Department of Agroindustrial Science and Technology, Federal University of Pelotas, 96010-900 Pelotas, RS, Brazil; Instituto Federal Farroupilha, Campus Alegrete, 97555-000 Alegrete, RS, Brazil.
Abstract:
The present study aims to evaluate the physicochemical, rheological, and safety properties of starches isolated from maize kernels with different types of defects. Starch isolation showed to be a valuable alternative to defective yellow maize kernels, since the presence of the evaluated kernel defects (broken, fermented, rotten, moldy, germinated, insect-damaged, and shrunken and immature kernels) did not provide significant changes on starch purity and colour. Only starch isolated from shrunken and immature kernels exhibited reduced extractability. Starch obtained from germinated kernels exhibited the greatest solubility. While flour from moldy kernels showed 7.5 ppb of aflatoxin A1, 25.0 ppb of aflatoxin A2, and 1229.4 ppb of fumonisin B1, any of these mycotoxins were detected in isolated starch. In sum, minor changes in pasting, thermal, crystallinity, and morphological properties of the isolated starches from defective kernels were determined, which does not impair its use in industrial processes.
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