Preventive Nutrition and Food Science
- Volume 4 Issue 3
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- Pages.175-179
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- 1999
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- 2287-1098(pISSN)
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- 2287-8602(eISSN)
Effects of pH and Gamma Irradiation on the Physicochemical Properties of Corn Starch
- Kang, Il-Jun (Division of Life Science , Hallym University) ;
- Chung, Cha-Kwon (Division of Life Science , Hallym University) ;
- Sohn, Jeong-In (Department of Chemistry ,Hallym University)
- Published : 1999.09.01
Abstract
To develop a production method for modified starches with less pollution, pH adjustment and gamma irradiation were applied to commerical corn starch. Blue values were significantly decreased , while alkali number, optical transmittance and solubility markedly increased when gamma irradiation was applied to pH 2 adjusted corn starch. Water binding capacity and swelling power at pH 5 were the highest among the samples. Gelatinization viscosity was considerably affected by gamma irradiation and pH of the starch. Gamma irradiation of pH 2 adjusted starch showed the lowest peak viscosity and the best cooling stability among the tested samples . Therefore, the production of modified starch with low viscosity as well as with sufficient viscosity stability seems feasible by controlling the pH of the starch and gamma irrdiation.