Fabric test pieces of cotton and silk dyed by purpurin, the principal component of Akane which is one of traditional Japanese dyestuffs, were exposed to NO2 gas in a glass chamber. Decrease in the tenacity of cotton thread and the elogation of silk thread was observed to occur, while the elogation of cotton thread showed a trend with a maximum value. Examination of dose-response characteristics between NO2 gas exposure and Δ E, color change of the fabrics, led to the following conclusions: NO2 exposure causes greater color fading of cotton than silk, and the degree of fading is enhanced by the humidity in both cases. This effect should not be ignored even in the human environment over a long period of time.
101 women who live in Osaka City were investigated regarding their dietary life and meal intake by using a quetionnaire. The results are as follows. 1) The obesity for those in their 40 and 50s was 24% and relative to the age. (p<0.05) 2) The energy was taken over to the value that recommended allowances. They must take exercise so as to lose 100-200kcal a day. 3) Sodium intake was 12.4g and this amount was considerate to be too much. 4) The fat/energy ratio was 25.8%, which was close to the desired level (20-25%). However more 60% of them exceeded 25%. 5) The calcium and iron intake was very small. 6) In the intake of cake, candys, seasonings, beverages, and green and yellow vegetables was too high. 7) In the ratio of intake for each basic food in the 6 groups, other vegetables and saccharide was not sufficient, but proteins, fats, oils, green and yellow vegetables were taken in excess. 8) The average number of different types of food taken each day (include seasonings) was 29.4 with many persons at nearly so different types each day. 9) Many people were well informed and were very carefully about their diets. 10) There were few differences between the A and B areas. Responders to the questionnaire were belong to the classes for health meetings or for the health and nutrition in some public health centers in Osaka City. These groups were more conscious and careful about the diets than ordinary housewives, but it is necessary even for them to be given appropriate nutrition guidance.