巻号一覧
18 巻, 6 号
選択された号の論文の5件中1～5を表示しています
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特に Oscillation Method について外山 敏夫, 香川 順1964 年 18 巻 6 号 p. 393-401
発行日: 1964/02/10
公開日: 2009/02/17
ジャーナル フリーThe Oscillation Method reported here is a modified method for measuring respiratory flow resistance described by Mead, in which inserting of a tube in the animal chest cavity is not required. Principle of this method with the connection to the mechanical properties of the lung and measurements of total respiratory flow resistance in five guinea pigs were described.
Without harming the animal this method can best be applied to the study of toxicity of respiratory irritants either in acute or long term chronic exposure experiment.抄録全体を表示PDF形式でダウンロード (3901K) -
第2報 環境および食品のHg汚染藤村 豊1964 年 18 巻 6 号 p. 402-411
発行日: 1964/02/10
公開日: 2009/02/17
ジャーナル フリーSince the discovery of the effectiveness of phenylmercury compounds for controling the rice fungus disease, “rice blast”, the consumption of mercury in the rice field has been tremendously increased in these ten years.
The mercury contamination of foodstuffs, water and soil has recently become the serious problem from the standpoint of public health.
As Stock in Germany reported in 1934, the environment and foodstuffs were proved to contain minute amount of mercury which had come from natural sources such as the soil or fuel exhaust. Such natural contaminations will change in different places and periods according to their industrialization and urbanization.
The purpose of this study is to confirm the present status of mercury contamination in daily life in Japan, serving as the basic data for the comparison in the near future.
1. The concentration of mercury in environmental air ranged 1.2∼18.0μg/m3 in urban area, and it seemed to increase in proportion to the car traffic volume. In the quiet area isolated from the traffic, such as in parks and on the roof-garden of building, it was similar to that of rural area. (1.2∼2.4μg/m3).
2. Mercury concentrations in rivers and ditches in Tokyo were approximately ten times as high (0.004∼0.1ppm) as that of rural area, indicating the contamination from industrial waste.
3. In rain and snow, 0.0006ppm of mercury was found in urban area.
4. For the soil, the figures were 0.018∼0.02ppm in dust on the streets with heavy traffic in Tokyo, 0.36∼0.38 in soil of field and paddy rice field in rural area.
5. Polished and unpolished rice reported as being treated with organic mercurials against the rice blast showed relatively high values ranging 0.03∼0.14. Especially, rice bran contained 0.21∼ 2.3ppm of mercury, suggesting the fat-soluble property of organic mercury. The figures in refined wheat flour and its bran components were approximately similar (0.05∼0.06ppm).
6. In vegetables and fruits, the figures were comparatively constant (0.05∼0.06ppm).
7. Meat, egg, dairy products and fish contained mercury less than 0.1ppm.
8. Extraordinary high values were found in chicken (0.16), egg yalk (0.3∼0.7) and tuna meat (0.5ppm).
The origin of high mercury content was unknown but in chicken and egg, the rice bran used in feed was to be suspected.抄録全体を表示PDF形式でダウンロード (1473K) -
今村 晋, 芦沢 義郎1964 年 18 巻 6 号 p. 412-415
発行日: 1964/02/10
公開日: 2009/02/17
ジャーナル フリーStudies were made on the egg-yolk reaction of leptospira and also on hemolytic factor produced in the reaction mixture.
The hemolytic factor is different from the themolabile hemolysin reported by Alexander in 1956 in that its hemolytic ability on rabbit erythrocytes was almost the same as on sheep erythrocytes.
The saprophtic strains showed generally strong positive reaction and strains belonging to pahtogenic serotypes showed variable results. Among strains of L. icterohaemorrhagiae, strain Mikawashima was very active and on the other hand strain Asakawa was not so.
The egg-yolk factor participating in the reaction was precipitated from culture fluid at 50% ammonium sulfate saturation and lyophilyzed after dialysis. The lyophilyzed powder was resolved in saline and then used for further studies. It was observed that Ca++ and Mg++ had stimulatory effects on the reaction.抄録全体を表示PDF形式でダウンロード (510K) -
森重 敏子1964 年 18 巻 6 号 p. 416-426
発行日: 1964/02/10
公開日: 2009/02/17
ジャーナル フリーGross counts of the radioactive substances contained in vegetable, milk, and fall-out of fission products deposited on leaf-vegitable were measured periodically since the unclear explosion performed in U.S.S.R. in November, 1961.
The results obtained were as follows.
1) In removing the radioactive substances deposited on the leaves. A remarkable difference in effect of rinsing was observed between these two results obtained by using only water, and by detergent, particularlly soaplees-soap.
The removal rate of the former was about 60% of that of the latter.
2) Seasonal variation of the gross counts of radioactive substances contained in the vegetables was almost same as that of deposits on the leaves of the vegetables.
As vegetables grew their radioactivity value gradually increased.
3) In the case of cow milk, no remarkable difference of the radioactivity value was observed when raw milk and pasteurized milk were examined.
4) The 95Zr-95Nb, 103Ru and 40K were found in all of the materials by a method of nuclear analysis of radioactive substances.抄録全体を表示PDF形式でダウンロード (972K) -
第1編: フッ素の定量法に関する研究飯塚 喜一1964 年 18 巻 6 号 p. 427-438
発行日: 1964/02/10
公開日: 2009/02/17
ジャーナル フリーColorimetric methods for fluoride, particularly using SPADNS-zirconium (proposed by Bellack and Schouboe) and modified Sanchromine-zirconium lake (by the author), were studied in this paper. Preliminary treatments suitable for various biological samples were also reported.
1) Both the SPADNS-Zr and modified Sanchromine-Zr methods were simple, stable and sensitive. As these lake have relatively high tolerance to interfering ions, there was no need for the preliminary clean up method for determining fluorine in drinking water. Thus they are far superior to the routine alizarin-zirconium method in the accuracy, sensitivity and simplicity.
2) For the accurate determination of fluorine in ion-rich water, such as mineral water of hot spring, the preliminary treatment with cation-exchange resin was recommended. However, in the case of anion-exchange resin there was found a little leakage of fluorine in the effluent, so that the re-passing through was necessary in some cases.
3) In case of heavily polluted sewage, industrial sewage or highly colored and turbid hot spring water, the dry-ashing and steam-distillation procedure were recommeded as the preliminary treatment.
4) For the dermination of fluoride in hard tissues, such as bone or teeth, the direct steam-distillation of powedered samples gave satisfactory results, thus enabling to omit the dry-ashing.
5) For animal soft tissues, body fluids, milk or urine and agricultural samples, which are all very poor in alkaline earth minerals, the dry-ashing procedure was to be done after mixed with refined CaO and later the steam-distillation was employed.抄録全体を表示PDF形式でダウンロード (1481K)
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