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Updated: Jan 20, 2026

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Modification of cereal and tuber waxy starches with radio frequency cold plasma and its effects on waxy starch
Akua Yeboah Okyere1, Eric Bertoft2, George Amponsah Annor1
1Department of Food Science and Nutrition, University of Minnesota, 1334 Eckles Avenue, Saint Paul, MN, 55108, USA.
Abstract:
The use of carbon dioxide-argon gas radio frequency cold plasma in modifying waxy rice, maize and potato was explored in this paper. Treatment with plasma at 120 W or 0 W (carbon dioxide-argon gas mixture only) resulted in significant increases in the enthalpy of gelatinization of all three waxy starches. Treatment with plasma or gas resulted in a significant increase in the resistant starch content of maize and potato with rice increasing only after gas treatment. Significant decreases were observed in the setback and final viscosities after 120 W treatment in all starches. Plasma and gas treatment resulted in a 5.5% and 2.8% decrease in crystallinity of potato but not rice and maize starch. NMR results showed the presence of V-type single helices in mostly maize and rice starches. Carbon dioxide-argon radio frequency cold plasma served as a useful tool in modifying the properties of all three waxy starches.
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