Studies on the Requirement of Amino Acids and Vitamins of the Yeast. Part V

Abstract

Nitrogen ssimilability of yeast depend on its inoculum size. So in the case of the determination of the nitrogen assimilability by yeast the experiments must be carried out in the same inoculum size. Sake yeast assimilate (NH₄)₂SO₄ as a nitrogen source better than other materials except of koji extract under the condition carried on inoculum size of 10³/cc. High nutritive value of koji extract are caused by means of the several vitamins which are contained in the koji extract.