酒造用原料米及びその処理に関する研究 : (第5報) 米粒細胞組織より見た精米に対する考察

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We have previously reported that the reduction of size of rice kernels during the polishing process was not exactly curvilinear but passed through three steps untill a 60% polishing ratio was reached, and that the reduction was retarded for a while as each of the three steps.To establish this fact we examined microscopically the rice kernels.At the first step where polishing ratio is about 85%, the Aleuron layer is removed. Inside this layer, is the first starch cell system which consists of a thin cell layer, and inside this system the second starch cell system is found consisting of medium size cells. In from the second starch cell system lies the third cell system consisting of large size cells.Pecause the large these cells grow, the stronger they become, the polishing is retarded somewhat just as it meets the new harden layer. Namely the second step of polishing lies on the border line of the first and second starch cell systems, and the third step of polishing lies on the border line of the second and third starch cell systems. However some parts of the second starch cell systems remain at a 60% polishing ratio, since the valleys of the kernels are so difficult to polish away.
公益社団法人日本生物工学会の論文
1962-10-15