抄録
Electronmicroscopic observations on thiamine rich yeast were made for the purpose of determining the location of thiamine in yeast cells. Thiamine crystal could be perceived neither electronmicroscopically nor by Debye-Scherrer's method on the cell surface, but the electron was permeated partially in the cell and some clear stripes were visible on its surface. The more thiamine is accumulated, the clearer the stripes become. It is supposed that since the majority of thiamine is on the cell wall, the difference of osmotic pressure due to drying causes plasmolysis, forming the stripes.
