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KMID : 0380619950270010030
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Korean Journal of Food Science and Technology
1995 Volume.27 No. 1 p.30 ~ p.35
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The Improvement of Corn Starch Isolation Process by Gamma Irradiation
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강일준/Kang, Il Jun
김성곤/권중호/변명우/이수정/Kim, Sung Kon/Kwon, Joong Ho/Byun, Myung Woo/Lee, Soo Jeong
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Abstract
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Gamma irradiation was applied to non-glutinous and glutinous corns for improving starch isolation process. No significant changes in proximate composition of corn grains were observed by gamma irradiation. Irradiation at 1 and 5 kGy was effective for sterilizing all contaminated microorganisms of non-glutinous and glutinous corns, respectively. The moisture-uptake rate constants were increased in proportional to the steeping temperature and applied irradiation dose level. The irradiation efficacy on water absorption properties was also recognized in the corns stored for six months at room temperature. The combined use of gamma irradiation with sulfur dioxide solution was very effective for reducing steeping time. The starch yield gradually increased as irradiation dose levels increased. At 2 kGy, the sarch yield of non-glutinous and glutinous corns increased by 38% and 27%, respectively. No significant difference in Hunter´s color value was observed between the starches isolated from nonirradiated and irradiated corn grains.
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