食品科学 ›› 2011, Vol. 32 ›› Issue (21): 17-19.doi: 10.7506/spkx1002-6630-201121004

• 基础研究 • 上一篇    下一篇

60Co-γ辐射对马铃薯淀粉特性的影响

范 蓓,马 静,李淑荣,李庆鹏,王 锋,周洪杰,哈益明*   

  1. 中国农业科学院农产品加工研究所
  • 出版日期:2011-11-15 发布日期:2011-11-11
  • 基金资助:
    中国农业科学院作物科学研究所中央级公益性科研院所基本科研业务费资助项目

Effect of 60Co-γ Radiation on Potato Starch Characteristics

FAN Bei,MA Jing,LI Shu-rong,LI Qing-peng,WANG Feng,ZHOU Hong-jie,HA Yi-ming*   

  1. (Institute of Agro-food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing 100193, China)
  • Online:2011-11-15 Published:2011-11-11

摘要: 采用60Co-γ射线对马铃薯淀粉进行辐照处理,辐照剂量分别为4、8、10、12、16kGy和20kGy,测定淀粉的颗粒特性及淀粉糊的透明度、热稳定性及冷稳定性。结果表明:辐照后的马铃薯淀粉颗粒形貌未发生明显变化、平均粒径变小;淀粉糊的透明度升高,峰值黏度减小,热稳定性及冷稳定性均显著提高。辐照剂量高于10kGy时,淀粉糊的峰值黏度与冷、热稳定性变化趋于平缓。

关键词: 马铃薯淀粉, 辐照, 颗粒形貌, 黏度特性

Abstract: Potato starch samples were radiated by 0, 4, 8, 10, 12, 16 kGy and 20 kGy 60Co-γ, respectively. The changes of starch granule morphology and the transparency, viscosity thermo-stability and viscosity cold-stability of starch paste were measured. After 60Co-γ radiation, the granular appearance of potato starch underwent little change, and the average size became smaller. The transparency, viscosity thermo-stability and viscosity cold-stability of potato starch paste increased while the peak viscosity revealed opposite changes. When the radiation dose was higher than 10 kGy, the peak viscosity, viscosity thermo-stability and viscosity cold-stability of potato starch tended to be stable. These results can provide a theoretical basis for producing modified potato starch.

Key words: potato starch, radiation, granular appearance, viscosity

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