Modification of cereal and tuber waxy starches with radio frequency cold plasma and its effects on waxy starch properties

Akua Yeboah Okyere, Eric Bertoft, George Amponsah Annor

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

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.

Original languageEnglish (US)
Article number115075
JournalCarbohydrate Polymers
Volume223
DOIs
StatePublished - Nov 1 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

  • Carbon dioxide-argon
  • Cold plasma
  • Radio frequency
  • Starch modification

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