The aim of this experiment was to investigate into the influences of pure oxalic acid upon the utirization of a calcium source. Feeding albino rats with diets containing 0.3% calcium (CaCO3 was used as calcium source) with 0.5-3% oxalic acid added, we investigated into there calcification. As shown in table, the same result as in the previous experiment was obtained. Oxalic acid, in free acid, reduced the utilizaton of calcium when its amount exceeded 1% of diet.
It has been known that thiamin reacts with carbohydrate as carboxylase after activated in the body. We have studied about activation of thiamin by the enzymic action of Saccharomyces mongolicus, and it is shown that thiamin is activated to produce the ester of it.
1. Douglas Bag 内に呼気を採集した時出来るだけ速かに分析する様にすべきである。良質の Douglas Bag に於いても1時間放置すればはCO2 4.5%の減少をみる。故に少くとも30分以内に採気管に導入されるべきである。 2. 採気管内に呼気を採集した時, H2SO4を残さずピンチュックを閉じておけば48時間後に於ても殆ど変化せず (1.6%減少), H2SO4を20cc以内に止めれば2時間後迄は放置し得る。この時1.5%減少する。 両者ともO2の変化は考慮に入れる必要無いものと思われる。
The authors have invested during 5 years since April 1939-March 1944 into 1200-3800 pupils of Toyooka Aviation Academy about the seasonal fluctuation of principal food and the relation between the basal calorie, weight of body, temperature and moisture, that is: (1) The seasonal fluctuation of principal food (monthly meandeviation of principal food) indicates the wavy curve as follows: This curve is estimated to represent the normal appetite of healthy Japanese young men and we named it “Appetite curve” (2) The relation between the appetite curve and the temperature, moisture, temp. × moist is, the appetite decreases during summer when temperature and maisture ascend, and in winter it shows the contrary. The correlation the two is: Appetite curve & temp. γ=-0.91±0.0524 Appetite curve & moist. γ=-0.80±0.0723 Appetite curve & temp×moist. γ=-0.02±0.0313 (3) The relation between the appetite curve and the weight of body is, the body weight decreases during summer when the principal food decreases and in winter it shows the two is: Appetite curve and weight of body. γ=+0.809±0.0693 (4) The relation between the appetite curve and the basal calorie is: Both the principal food, the basal calorie are low in summer and high in winter. The rate of principal food is more remarkable than basal calorie. This fact shows the close connection between decrease of weight in summer and increase of weight in winter. (5) The above relation between the appetite curve and the weight of body, temperature, moisture, temp.×moist is as the following graph.