1955 年 9 巻 p. 293-295
In order to know whether TAD and TPD are decomposed by thiaminase, it was examined if TAD or TPD mixed with fern juice containing thiaminase in a test tube, was decomposed, and also if TAD, orally given with fern, was decomposed within the intestines of the animals. It was found that TAD, quite different from ordinary thiamine, was never decomposed by thiaminase either in vivo or in vitro.