核农学报2012，Vol.26Issue(1)：80-85,6.
60Co γ射线辐照预处理对甘薯热风干燥特性的影响
INFLUENCE OF 60Co γ IRRADIATION PRE-TREATMENT ON CHARACTERISTICS OF HOT AIR DRYING SWEET POTATO SLICES
摘要
Abstract
The influences of irradiation, hot air temperature and thicknesses of the slices on the characters of dehydration and surface temperature of 60Co γ-rays irradiated sweet potato were investigated. Meanwhile, microscopic observation and determination of water activity of irradiated sweet potato were conducted. The results show that the drying rate and the surface temperature rised with the increasing of irradiation dose. When the dry basis moisture content was 150% , the drying rate of the samples were 1.92, 1.97, 2.05, 2.28, 3.12%/min while the irradiation dose were 0, 2, 5, 8, 10kGy, and the surface temperature were 48.5℃ , 46.3℃ , 44.5℃, 42.2℃, 41.5℃ , respectively. With higher air temperature and thinner of the sweet potato slices, the dehydration of the irradiated sweet potato slices were faster. The drying speed of sweet potato slices at 85℃ was 170min faster than that of 65℃. The drying speed of 7mm sweet potato slices was 228min faster than that of 3mm sample. The cell wall and the vacuole of the sweet potato slices were broken after irradiation, and its water activity increased with the inorease is radiation dose. The water activity of the irradiated samples were 0. 92, 0. 945, 0. 958, 0. 969, 0. 979 with the irradiation doses of 0, 2, 5, 8, 10kGy, respectively. The hot air drying rate, surface temperature and water activity of sweet potato are significantly impacted by irradiation. The conclusion provids a theoretical foundation for further processing techonology of combined radiation and hot air drying sweet potato.关键词
辐照预处理/甘薯/热风干燥Key words
irradiation pre-treatment/sweet potato/hot air drying分类
轻工纺织引用本文复制引用
江宁,刘春泉,李大婧,刘霞,严启梅..60Co γ射线辐照预处理对甘薯热风干燥特性的影响[J].核农学报,2012,26(1):80-85,6.基金项目
江苏省农业科技自主创新资金（CX（08）146） （）
