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中文摘要：
研究经0-52.7 kGy^60Co-γ射线照射后的明胶黏度、胶凝特性、蛋白组分、分子量与吸收剂量的关系,结果表明,明胶的特性黏度、相对黏度、凝胶强度、熔化温度和分子量随剂量的增加呈下降趋势.明胶的大分子物质含量随剂量的增加而减少,M n和M w范围为7 839-10 861,32 444-36 506.分子量分布逐渐加宽,范围为3.36-4.45.同时,辐照后明胶膜的胶凝点上升,范围39.8-42.7℃.明胶颗粒的致密性好,表面平滑.实验结果说明,在有限水和无限氧气存在下,小分子量明胶的辐射反应为分解反应.
英文摘要：
The gelatin was irradiated by ^60Co-γ with the dosages of 0-52.7 kGy and the parameters including viscosity,gel strength,protein component and molecular weight were determined immediately.The results showed that the intrinsic viscosity,relative viscosity,gel strength,molecular weight,and melting point decreased with the increasing of the dosage.The content of high molecular weight components decreased.The number average molecular weight and weight average molecular weight were in the range of 7 839-1 061 and 32 444-36 506.The polydispersity was between 3.36 and 4.45.Compared with the intact gelatin,the irradiated one had the wider distribution of molecular weight and higher gelling temperature,the range of which was 39.8-42.7 ℃.Moreover,the membrane was smoother.The results indicated that the main reaction of gelatin during the irradiation was degradation under the condition of limited water and oxygen.
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