It has been assumed that the formation of 5'-GMP and other nucleotides during the boiling process of dried Shiitake was due to the activity of the RNA degrading enzyme system. In order to clarify detailed mechanisms of the RNA degradation in dried Shiitake, studies were carried out on the properties of the RNase in the water soluble fraction of dried Shiitake. Results obtained may be summarized as follows :
1. The RNase was found to have optimum activity at pH 4.2, and to be stable to heat-treatment at 60°C for 5 min. at near neutral pH, but unstable at acidic pH. It was also found that the RNase was inhibited by Cu⁺⁺, but not affected by several other metal ions EDTA, and NaF at pH 4.2.
2. On the basis of analysis of the reaction of the products, the RNase action on yeast RNA was assumed to be endonucleolytic and specific to phosphate diester bond at 3' position.

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Beans, Chinese noodle, and Okonomi-arare (special Japanese food composed mainly of rice cake and shrimp cake and consumed at the time of drinking) were fried at 180°C for 2 minutes with soybean oil or lard. For this experiment, four kinds of oil and fat were employed, namely, without antioxidant, 0.2 %, BHA added, 0.05% alpha-tocopherol added, and 0.2% BHA plus 0.05% tocopherol added, and the state of preservation of these foods was compared. The fried foods prepared with oils added the mixture of these two antioxidants were found to keep their quality for the longest period, and those with BHA were the next. When the fried foods were prepared with these oils preheated for 4 hours at 180°C, the degree of rancidity during the storage of these was found to be greater than those with the non-heated oils, and, in this case, the fried foods with oils containing the antioxidant mixture could relatively resist the oxidation.

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In the previous report, we pointed out that the preparation of mashed potatoes is difficult because potatoes become viscous during the process of cooking.
The following methods were used in this experiment to show the results on the causes making a phenomena mentioned above.
(1) Wash the mashed and cell-separated potatoes by boiling water.
(2) Decomposition of the pectin in potatoes by enzyme.
When the mashed potatoes are washed by boiling water, pectin in the cell is taken out which causes prevention of the stickiness even after cooling.
When pectin is decomposed by enzyme, The cells are separated easily. Therefore, the cohesiveness of pectin seems to be one of the causes which make the mashed potatoes viscous.
Moreover, it becomes clear that the rigidness of starch gel in the cell, as the cooked potatoes are cooled, is a cause of the decomposition of cell by straining.
When the cooked potatoes are frozen, pectin in the cell weakens, and diminishes the starch gel, which facilitates the straining and prevents the cell from destroying.

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“Sushi” rice or boiled rice seasoned with vinegar and salt loses the flavor if it was left in the room temperature for some time after the cooking. However, when the rice is covered immediately after the cooking, vinegar has much taste and starch is slow in the retrograding as compared with the rice left uncovered. Therefore, it is good for “Sushi” rice to be kept covered if it has to be left for over night.

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Experiments were carried out with various fabrics and detergents to study therel ation between removal and redeposition of particulate soils using ferric oxide as model soils. The examined fabrics were cotton, polyester and polypropylene, and the detergents were fatty soaps, sodium dodecyl sulfate, linear alkylbenzene sulfonate and polyethylene-oxide alkyl phenyl-ether.
The results were as follows.
(1) Cotton was the easiest fabric to be cleaned, while polyester and polypropylene were difficult.
(2) On the whole, soap had the highest detergent efficiency, especially in the case of polyester. S.D. S. was inefficient remarkably for polypropylene.
(3) Phenomenon of redeposition of dirt on swatches could not be observed for cotton. The amounts of redeposition were remarkable when polypropylene and polyester swatches were washed by S.D.S.
(4) Efficiency of detergency obtained from reflection increase of swatches by washing and percentage of soil removal from chemical analysis of Fe₂O₃ were compared. Difference between both values was extended as redeposition in washing bath was increased.

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Resistance to yellowing by light, to crease resistance and to bending were examined with various fabrics, Cashmillon (acrylonitrile fabrics), Tetoron (polyester fabrics), Nylon (polyamid fabrics) and Acetate, sizing with 0.05%, 0.1%, 0.3% and 0.5% aqueous solutions of C.M.C., soluble starch, dextrin, PVA and acrylic resin emulsion.
1) Resistance to yellowing by light in each testing cloth did not change in spite of using different amounts. In the case of Cashmillon and Tetoron, reflection indices of the testing cloth were decreased as the time of illumination was extended. But, reflection indices of the sized cloth were smaller than those of the unsized cloth.
2) Crease resistance of the testing cloth sized with the acrylic resin was increased and its property of recovering was improved. Crease resistance of Nylon and acetate was stronger in higher amount of sizing material, while that of Tetoron and Cashmillon was the reverse.
3) Bending resistance was generally increased.

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Woolen yarn (2/60s), proofed with Eulan U33, Mitin or dieldrin and soiled with several common food materials (10-20% on yarn), was exposed to the attack of the Attagenus-larvae with the routine method (Table 1).
When moth-proofed in conventional concentrations, the proof ness was practically excellent, the damage being lower than 5mg per 1 and 4 weeks (per 10 larvae, 30°C, 65% RH); when stained, the damage was increased with Eulan and Mitin, the effectiveness being poor, while with dieldrin, excellent even if stained. When the concentration is one-fourth of the conventional one, the proofness was poor except with dieldrin. When the concentration is four times as high as the conventional one, results were satisfactory. The mortality was generally 100%. Damages caused by food materials used in the present experiment degrease in the following order : Milk, black tea (with sugar), orange juice, Japanese saké, Japanese vinegar; with soyasauce, the damage is decreased. Soil-removing is, therefore, indispensable even with moth-proofed woolen textile.

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The adhesive nonwoven interlining made from thermoplastic fibre which could be melted by heat was tested on binding effect under various temperatures and times.
Three shirt cloths were interlined respectively with the adhesive nonwoven fabric, and shrinkage, changes of the thickness, and crease-resistance after ten of launderings were investigated. Also stiffness was compared with that of the cloths starched by C. M. C.
The results obtained are as follows;
(1) The most suitable ironing condition is 160°C in temperature and 10 seconds in setting time.
(2) The shrinkage of the interlining is almost the same as that of the cloth itself.
(3) The thickness change after ten launderings is negligibly small.
(4) The stiffness decreases 20-50% after ten launderings
(5) The stiffness of the interlining after ten launderings is almost the same as that of the cloths starched by 0.6% C. M. C. solution.
Therefore, the adhesive nonwoven fabric is estimated to be effective for interlining of shirt cloths.

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With the object of making suitable infants' garments, we measured in July 1967, 556 infants on 21 measurements-stature, spina ilica ventralis height tibiale height, cervical height, navel height, crotch height, foot length, ankle height, posterior waist length, posterior full length, arm length, posterior shoulder width, bust girth, abdominal girth, abdominal width, abdominal depth, neck base girth, upper arm girth, thigh girth, head girth and weight. The subjects lived in Kurashiki City and aged from 3 to 5 (Tab. 1).
The results are summarized below.
1) The mean values of all measurements of the two sexes markedly increased with age. In all ages males were generally greater than females in all measurements except thigh girth (Tab. 2 & Fig. 1).
2) In comparison with the data on adults' (20 years of age) 14 measurements, the differences between adults and infants were much larger in the measurements of height and length than in those of girth (Fig. 2-1 & 2-2).
3) The correlations between stature and eight measurements of height and length and between bust girth and abdominal girth were generally high (Tab. 3).

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Based on Part 1, we examined infants' body proportion.
The results are summarized below.
1) With both sexes, index values of lowerlimb length, tibiale height, navel height, cervical height, crotch height, and posterior full length to stature, and thigh girth to bust girth generally increased with age, but those of foot length, ankle height, and bust girth to stature, and abdominal girth and head girth to bust girth, and Rohrer decreased with age.
2) In the three ages there was little difference between the two sexes on those index values, but in two items of abdominal girth and thigh girth to bust girth females were greater than males with significant difference (Tab. 1 and Fig 1).

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In recent years, the physique of children has been elevated, and it is interesting to investigate the relation between physique and physical strength. The physique and physical strength of the children in Fukushima district were investigated in 1965. The results of these investigations, indicate that the physique of the children has been elevated, but their physical strength has not always been improved, as compared with the level before World War II, and that there is no close correlation between physique and physical strength, in contradistinction to the results reported by earlier investigators. The physique of children in Fukushima city is about the same as that in the agricultural district, but as for the physical strength, city children show superiority over children in the agricultural district.

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Investigations were made in order to obtain some guidance as to the ideal family planning. Methods of contraception were as follows : the condom method 30%, Ogino contraception method 20%, the contraceptive method 13%, etc. This tendency was independent of districts, educational background of wives, or occupation of husbands. Twenty-four per cent of wives answered that they themselves should take some measures to control conception when their husbands' cooperation was unobtainable.

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In order to obtain some guidance as to the practical administration of ideal family planning, investigations have been made on the general recognition of optimum age for the first labor and also of the possibility of birth of mentally or physical handicapped child by difficult labor. Discussions are given, analyzing the collected answers, from especially the viewpoint of health of mothers and children. Ninety per cent of questionees answered that the optimum age for the first labor is 20-29 years of age, indicating that most of them have right understanding on this matter. However, only a half of them are aware that a child with mental or Physical handicaps may possibly be born by difficult labor.

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