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KMID : 0665220030160020105
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Korean Journal of Food and Nutrition
2003 Volume.16 No. 2 p.105 ~ p.110
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Studies on the Retrogradation Properties of Rice Starch
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Lee Chan
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Abstract
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The effect of varietal differences of rice starches by amylose content and gel consistency on the retrogradation behavior was studied. The gel consistency test, which is designed to detect differences in the texture of cooked rice of varieties that have a similar amylose content, had been turned out to be useful in this study. Both Suwon 232 and San Li Cun had higher amylose content, but were greatly different in gel consistency values. The results showed that setback viscosity of rice flour measured in a Brabender amylograph was significantly affected by amylose content as well as gel consistency. Increase in the rigidity modulus (E) of rice starch gels during storage determined by using Texture analyzer indicated that amylose content was an important factor in terms of hardness development The study of Avrami kinetics of retrogradation showed that time constant of rice starch gels was influenced by amylose content, but not by gel consistency.
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KEYWORD
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rice starch, amylose, retrogradation, Avrami kinetics
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