Effect of gamma irradiation on the thermal and rheological properties of grain amaranth starch

Xiangli Kong, Stefan Kasapis, Jinsong Bao, Harold Corke*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Physical properties of starch from two cultivars of gamma-irradiated grain amaranth with different amylose content were investigated. Pasting viscosities decreased continuously with the increase in dosages of irradiation. Furthermore, different irradiation dosages resulted in modification of the thermal properties and crystallinity of starch. Dynamic oscillation on shear was also employed, temperature and frequency sweeps showed that changes in storage modulus and loss modulus were significant, with Tibet Yellow producing more elastic gels as compared to Hy030 at different irradiation dosages.

Original languageEnglish
Pages (from-to)954-960
Number of pages7
JournalRadiation Physics and Chemistry
Volume78
Issue number11
DOIs
StatePublished - Nov 2009
Externally publishedYes

Keywords

  • Gamma irradiation
  • Grain amaranth starch
  • Rheology
  • X-ray diffraction

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