The following preparation of mold pericle was found to be fatal to the test animal rats.: Surface culture of Penicillium rugulosum and Penicillium tardum on czapek's medium, 50 and 25 gram of obtained pericle dried at 55 to 60°C being mixed per 1 kirogram of basal diet. Both the strength of toxicity resulted the decease of test animal within 10 to 52 days. The main cause of death is found to be kidney disease.
Comparative studies are made on the muscle power of blind and normal school children (9-20 age) in 3 prefectures of Tohoku district, and the following characteristics are found. Power of shoulder and arm muscles (measured by a special instrument designed by Prof. Kondo) and especially backmuscle-power of blinds are inferior to normals'. In the indices of both muscle-powers to their body weight, blinds are more inferior to normals than in their absolute power, therefore it seems that blinds' muscle power is relatively week to their physical conditions.
An evaluation of the essential amino acid intakes was calculated using the data of the National Nutrition Survey in Japan, to find out the actual intake of the essential amino acids by Japanese people. The results showed the amount of intake of lysine and methionine was higher in urban than in rural. Though in both area the intake of sulfur containing amino acid and tryptophan was low compared with the provisional protein. Tryptophan being 73%. When comparing the yearly intake of essential amino acids during 1946-1956, a yearly increases of leucine, isoleucine, lysine, methionine and threonine was seen per gram of nitrogen, but no change in phenylalanine, tryptophan and valine was seen.