摘要
用差热分析(DTA)方法,测得了稻谷在不同含水量状态下的差热分析曲线,湿基含水量为30% 、24% 、18% 时稻谷的热变性温度分别为37.8℃、49.2℃、58.7℃。回归分析得出了稻谷含水量与热变性温度的关系方程,证明稻谷含水量越高,允许受热极限温度越低。
In this paper, the authors applied the differential thermal analysis (DTA) to study thermal behavior of starch in paddy. DTA curve being different moisture were measured by DTA apparatus. Thermal denaturation temperature (TDT) corresponding with respective moisture (wet basis) 30%, 24%, 18% is 37 8℃, 49 2℃, 58 7℃. The regression equation that reflects the relation between paddy moisture and TDT is θ lim =90 4-1 7 M . The higher is the moisture of paddy, the lower is its TDT. The upper limit temperature for paddy drying can be determined by the equation. The paddy denaturation reason is that the starch of paddy is gelatinating in endothermic reaction. The rice taste of denaturation paddy is bad.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2000年第1期76-78,共3页
Transactions of the Chinese Society for Agricultural Machinery
基金
黑龙江省自然科学基金!(项目编号: E9825)