The purpose of the Part 2 is to analyze the time spent on social/cultural activities, through the findings of the time allocation survey (detailed in to part 1) and the supplementary questionnaire on free time conducted on the couples living in Setagaya Ward.
The questionnaire asked the “participation in each of the 48 hobby items, the 40 sport items, and the 20 social activity items, ” which were picked up on the basis of “The Survey on Time Use and Leisure Activities” that was conducted by Statistics Bureau of Management and Coordination Agency of Japan.
The analysis of the questionnaire is concentrated on the time allocation by husbands and wives as follows.
The percentages of the respondents spending their free time on hobbies, sports, and social activities in the survey period are 56%, 40%, and 19% (husbands); 52%, 18%, and 34% (wives) respectively. The percentages of sports (wives) and social activities (husbands) stay in a low level. The numbers of hobbies and sports which they presently enjoy are 10.8 (husbands) and 11.4 (wives). The past and present percentages of the husbands participating in social activities are both rather low, or half of those of the wives. Both the husbands and the wives pick out the participation in the environmental preservation activities as a social activity they wish to take part in.

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The purpose of the Part 3 is to explain the actual status and their consciousness of involvement in housework by husbands and wives, on the basis of the findings of the time allocation survey and the questionnaire on housework conducted on the couples living in Setagaya Ward. The questionnaire includes the reviews of their own and their wife/husband's involvement in housework, and the expectation from their wife/husband on the further involvement in housework.
The finding of the analysis are :
(1) The participation in housework by husbands depends on the working status of their wives : non-working, part-time working, and full-time working. Though the husbands of full-time working wives have spent more time on housework than those of the other wives on weekdays, the ratios of the housework allotment remain rather low, approximately 10%.
(2) The wives whose husbands regularly help housekeeping have higher expectations from their husbands on participation in housework, and regard their present involvement as insufficient.
(3) The promotion of the husbands' participation in housework by breaking through the traditional role separation concept among both husbands and wives is required for the realization of their rich aged life which couples will spend together.

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In our previous experiments decrease of food intake and fetal death during the last few days of pregnancy were observed in rats fed a diet of 10% soy protein isolate (SPI) throughout pregnancy. Fetal growth and maternal metabolism were studied on 19th and 20th day of pregnancy. Rats were fed on a 20% SPI diet and a 20% SPI+0.6 % Met diet and a 10% purified whole egg protein (PEP) diet for control.
The food intake and body weight of the 20% SPI diet groups decreased after 18th day of pregnancy. The concentrations of free amino acid and urea nitrogen in serum and amniotic fluid of the SPI diet groups showed higher values than those of the PEP diet group. Free fatty acid concentration in serum of the SPI diet groups was lower, while glucose concentration in serum of the SPI diet groups was higher than those values in serum of the PEP diet group, respectively. Estrogen values in urine of the SPI diet groups were higher than that of the PEP diet group in 19th day of pregnancy. These results suggested that during the last few days of pregnancy even a 20% SPI diet with a supplement of L-methionine was not sufficient for nutritional requirement of maternal rats and that SPI diets induced changes of endocrine system in pregnant rats.

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The effects of fresh pineapple juice on the physical properties of gelatin sol and gel were investigated. The results obtained were as follows :
(1) The protease activity of the fresh fruit juice obtained from the crown part of pineapple was stronger than those from its center and tail parts.
(2) Immediately after the addition of pineapple juice to 10% gelatin sol at the concentration of 2.5 vol %, the molecular weight of gelatin and the viscosity of the sol decreased remarkably. The addition above 5 vol% resulted in the disappearance of the gel-forming ability of the sol.
(3) When the pineapple juice which had been self-digested at 30°C for 1 hr was added to gelatin sol, the decrease in the viscosity was suppressed.
(4) When the pH of the sol added with pineapple juice was adjusted to 5.0 or 8.0, the viscosity of the sol and the breaking stress of the gel reached to the minimum, while the sufficient gel-forming ability still remained when the pH of the sol was adjusted to 3.0 or 9.0.

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The definition of the texture profiles of jelly fig gel by instrumental measurement and sensory evaluation was investigated in comparing with the other food gels.
Of the properties by the instrumental measurement, cohesiveness and rupture strain of jelly fig gel had large values. Four textural values and two curdmeter values, and four rupture values (ten parameters) were analyzed by stepwise discriminant method.
The properties by the instrumental measurement of the five gels (jelly fig, LM pectin, gelatin, carrageenan and agar) were classified by canonical variables, and jelly fig was similar to LM pectin gel.
The sensory evaluation demonstrated that jelly fig gel was hard and strong, and did not soluble in mouth. The ten textural properties were scored by a sensory evaluation of the five gels, which were classified for discriminant score although there was a small overlap. The greatest score difference appeared between the jelly fig and agar gels, that is LM pectin, gelatin and carrageenan gels scored between these two extremes and textural properties of jelly fig gel was similar to those of LM pectin gel.

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[in Japanese]

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The heats of combustion of fiber assemblies and fabrics used for clothing and bedding were investigated as the measure of security necessary for human daily life, in which the inorganic and organic flame retardant finishes were used. The results were as follows :
(1) Inorganic undurable flame retardant finishes to both of fiber assemblies and fabrics reduced the heat of combustion. On the other hand, washable flame finishing showed some increase.
(2) A miniature “Futon” made of both flame retardant finished ticking and fiber assemnlies showed the heat of combustion much less than that made of both unfinished materials.
(3) The higher the composition of cotton, the larger the effect of flame retardant finishing on the reduction of the heat of combustion of cotton/polyester blended fiber assemblies.
(4) As to the widely used commercial fabric, the heat of combustion of the synthetic fiber was higher than that of the natural fiber, and also that of nitrogen-containing fiber was higher than that of nitrogen-free fiber. However, the introduction of flame retardants into all these fiber materials showed a lowering tendency of the heat of combustion.
(5) The security will be more improved by reducing the heat of combustion of flammable textile products through the flame retardant finish.

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To elucidate linear expansion of fiber materials along the perpendicular (+) and parallel (=) directions to drawing axis, experimental method using laser scan micrometer was studied. This method was available for the samples whose expansion coefficients were above the order of 10-5 K^-1 and those sizes were in the range of 0.3 to 30 mm. Relative length changes (E) of nylon 6 monofilaments with various draw ratios were measured in the range of 30 to 120°C. The E vs. temperature plots displayed slightly upward curvature for the sample withdraw ratio 1.0 in both directions. With increasing draw ratio, anisotropy that E₊ increases, but E₌ decreases, was obtained. Cubic expansion calculated from linear expansion agreed closely with that obtained by dilatometry.

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The restriction of five kinds straight skirts versus a swimsuit was investigated; from the viewpoint of lower limb movements analysis and E.M.G. analysis during walking on the flat or going up and down stairways.
The goniogram in the knee joint during walking and going up stairs differed among the skirts.
The surface E.M.G. in leg muscles (M. rectus femoris, hamstring M., M. tibialis anterior and M. gastrocnemius) were recorded. In the case of wearing the skirt of less movability, two muscles were activated much more than the usual state; M. tibialis anterior during walking, and M. rectus femoris during going up stairs.
The sensory test to decide good walking condition of the skirt was conducted. The results agreed with the results of E.M.G. and of goniogram in the knee joint.
When going down stairs, the movement was not affected by the kinds of skirts.

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