Effect of gamma irradiation on the thermal and rheological properties of grain amaranth starch |
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| Authors: | Xiangli Kong Stefan Kasapis Jinsong Bao Harold Corke |
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| Affiliation: | aSchool of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China;bSchool of Applied Sciences, RMIT University, City Campus, Melbourne, Vic 3001, Australia;cInstitute of Nuclear Agricultural Sciences, Key Laboratory of Zhejiang Province and Chinese Ministry of Agriculture for Nuclear-Agricultural Sciences, Zhejiang University, Huajiachi Campus, Hangzhou 310029, China |
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| 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. |
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| Keywords: | X-ray diffraction Rheology Grain amaranth starch Gamma irradiation |
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