engleski

Influence of the high-voltage electrical discharge treatment on selected properties of maize starch

The aim of this research was to investigate the influence of the high-voltage electrical discharge treatment (HVED) on the modification of maize starch. Maize starch was treated with HVED (70 Hz ; 30 min), Na2HPO4 (2.5%), Na5P3O10 (2.5%), and by a combination of the HVED treatment with each chemical modification. Amylose content was determined by the Megazyme K-AMYL 07/11 method, resistant starch (RS) content by the AOAC 2002.02 method, damaged starch (DS) by the AACC 76-31.01, and SEM micrographs were taken. The results revealed that the HVED treatment does not significantly influence the amylose and resistant starch content, but it enhances the effect of chemical modifications on these properties, reducing both the amylose and RS contents. Starch damage, contrary to expectation, decreased after all the modification processes. The SEM analysis revealed physical damage to starch granules by the HVED.

HVED ; corn starch ; phosphorylation ; resistant starch ; SEM

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