From the growth experiment on rats, it is clearfied that cocoanut-oil is inferior than olive, and it is considered that it may be due to the destruction of unsanitary fatty-acid of cocoanut-oil by cracking.
Investigation were made for frequencies of Bacteria groups of Streptococci and Esherichia, appearing in cheese produced in Japan and Foreign countires. Streptococci concerns the period of ripening but it could not be examined as well as Escherichia and Aerobacter groups in cheese sold in markets.
It is very important to know whether the nutritive values calculated from the food composition table are actually ingested. Samples collected from various subjects were chemically analysed to determine the contents of some kinds of minerals regarding which there seemed to have been some discrepancies between the values calculated and analysed. Concerning calcium intake per day, analysed value tended to stand higher than the calculated value, and the difference was found significant about most subjects. Iron was also greater in the analysed value, and when staple foods and side-dishes were observed separately, the former were higher in analysed value and the latter had no significant difference.
To reveal the working conditions of housewives in a rural Community a survey of time study was made on 184 wives. The results in a busy season were compared with those in a leisure season, and the work was found too heavy for them. Hours for farming in a busy season increased up to 9 hours 26 minutes, which corresponded to two and a half times the length of the working hours in leisure season. The increased requirement was made up at the cost of hours for education and housekeeping and finally even the indispensable hours for living such as sleeping and eating. The amount of work both in a leisure season and in a busy season expressed in terms of work amount index was 1777 and 3020, respectively. The energy expenditure for a day in respective seasons amounted to 2717Cal and 3734Cal. These findings might prove an overwork of farmer's wives in Kumamoto, as compared with those in Tohoku District.
Among many other minerals contained in foods, copper was determined in this experiments to find a level of the copper content of Japanese daily foods. For analysing, only muscles of fish were separated from other inediqle parts, and were dried, while frnits and vegetables were analysed in fresh state. Then samples were asked by wet method with sulfuric acid, nitric acid and hydrogenperoxide. Determination was made by colorimetry with diphenyl-thiocarbazone by using a photoelectric colorimeter. Results are shown in the table 1, 2 and 3.
It has not been much studied yet whether lower alcohols are nutritious or not, or how poisonous they are when they are given to animals. We made a certain kind of non-carbohydrate food and added to it 10 or 20 percent of alcohol of carbonic number 1-10. This was given to some white rats and the change in their weight was examined together with the increase and decrease in the quantity of liver glycogen. As a result of the experiment it was found that those rats which had been given the food of the higher carbonic number got more body weight, and that the quantity of liver glycogen was the smaller with the increase of their weight, and that the lesser the increase in weight was, the larger the quantity of glycogen was. When vitamin was eliminated from the alcoholic food, the rats died in five or six days. In this case no glycogen was left in the liver.