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http://dx.doi.org/10.3746/jfn.2003.8.4.343

Effect of γ-Irradiation on the Physicochemical Properties of Zein Films  

Lee, Sehee (Department of Food Science and Technology, College of Agriculture and Life Sciences, Chungnam National University)
Lee, Myoungsuk (Department of Food Science and Technology, College of Agriculture and Life Sciences, Chungnam National University)
Song, Kyung-Bin (Department of Food Science and Technology, College of Agriculture and Life Sciences, Chungnam National University)
Publication Information
Preventive Nutrition and Food Science / v.8, no.4, 2003 , pp. 343-348 More about this Journal
Abstract
To elucidate the effect of gamma-irradiation on the physicochemical properties of zein films, the molecular and mechanical properties of the films were examined after irradiation at various irradiation doses. Gamma-irradiation of zein solutions caused the disruption of the ordered structure of the zein molecules, as well as degradation, cross-linking, and aggregation of the polypeptide chains based on an SDS-PAGE study. Gamma-irradiation increased the solubility of zein and decreased the viscosity due to cleavage of the polypeptide chains. Protein solubility of the zein films in urea/2-mercaptoethanol also increased with increasing irradiation doses. Alterations of the zein molecules by irradiation decreased water vapor per-meability by 12% and increased the elongation of zein films. However, mean tensile strength of the zein films was decreased by gamma-irradiation treatment. Measurement of Hunter color values indicated that irradiation caused a destructive effect on yellow pigments, resulting in a significant decrease in Hunter b values. The microstructure as observed by scanning electron microscopy showed that irradiated zein film had a smoother and glossier surface than the non-irradiated films.
Keywords
zein film; irradiation; physicochemical properties;
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Times Cited By KSCI : 1  (Citation Analysis)
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