Abstract
On rats adminstered with TAD or TPD, observations were made on the affinity of the chemicals to the tissues of visceral organs, as well as on the ratio of free thiamine content in the liver as against the total quantity of thiamine. The thiamine content in the liver, stomach, small intestines and blood of a rat, to which TPD had been supplied orally, always showed a higher value than that of another rat to which ordinary thiamine had been supplied. It was also ascertained that in the albino rat or mouse, phosphorization took place easier with TAD than with ordinary thiamine.