一粒の生玄米の乾燥特性

抄録

This experiment was conducted to examine the effects of hull on the drying characteristics of rough rice. The experimental apparatus used was the same as the one reported in previous papers (ref. 1, 2).
Results obtained were shown in Figs. 1 through 3.
1) The drying curves of one grain of hulled rice showed either the constant drying period or the falling period from the beginning and were influenced by both the temperature and the relative humidity of the air.
2) The drying rate of one grain of hulled rice was larger than the drying rate of one grain of unhulled rice and reached the equilibrium moisture content in shorter drying time.
3) The cracking of hulled rice occured from air temperatures of 40 C up (Table 1).
4) Therefore it seemed that the hull worked as resistance to the drying of rough rice wrapped by husk and also as protective material against cracking of brown rice which was contained in rough rice.