~60(Co) γ辐照对胡萝卜干燥特性的影响  

Effect of ^(60)Co γ-irradiation Pre-treatment on Drying Characters of Carrot

作　　者：廖文艳[1] 王俊[1] 于勇[1] 傅俊杰[2] 

机构地区：[1]浙江大学生物系统工程与食品科学学院,杭州310029 [2]浙江大学农业与生物技术学院,杭州310029

出　　处：《农业机械学报》2010年第6期123-127,171,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(30471000);高等学校博士学科点专项科研基金资助项目(20020335052)

摘　　要：采用60Coγ射线对胡萝卜进行辐照预处理,研究了辐照剂量、干燥温度、切片厚度三因素对干燥和温度特性的影响。结果表明:干燥速率和表面温度随着辐照剂量的升高而升高。对胡萝卜显微结构以及水分活度进行研究,发现经γ射线辐照处理后的胡萝卜细胞壁变薄出现断裂,液泡破裂,水分活度也随辐照剂量的增大而升高。这些变化是导致失水速率加快和温度特性变化的主要原因。另外,热风温度和切片厚度对干燥特性也有影响。热风温度越高,切片越薄,辐照后胡萝卜失水速率越快。The influence of different dosages of irradiation,temperatures of hot air,thicknesses of the slice carrot on the characters of dehydration and surface temperature for the irradiated carrot were studied.The results showed that three factors affected the characters of dehydration： irradiation dosage,temperature of hot air,and thickness of the slice carrot.With the increase of the dosage,both the rate of dehydration and the surface temperature for carrot increased.Then,the microstructure and water activity were also studied.The results showed that the membrane of the cell wall and vacuole of the irradiated samples were broken.The great dosage brought on the high water activity.These changes were the main cause for the characters of dehydration and surface temperature irradiated carrot.

关 键 词：胡萝卜 辐照预处理 低温热风干燥 

分 类 号：S375[农业科学—农产品加工] O571.33[农业科学—农艺学]