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Volume 21 (1966 - 196･･･
- Issue 6 Pages 371-
- Issue 5 Pages 325-
- Issue 4 Pages 269-
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Volume 21, Issue 4
Displaying 1-8 of 8 articles from this issue
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Hisashige Tanimura1966 Volume 21 Issue 4 Pages 269-278
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSThis paper describes the surveying Benzo (a) pyrene (hereafter abbreviated as BaP) of the suspended matters and the falling matters which were collected from the industrial downtown district and urban residential district of Kita-kyushu city in summer and winter from 1964 to 1965, and then the investigating on the relations between BaP of the suspended matters and that of the falling matters which were collected at the similar places and times.
The results are as follows.
1) The highly correlations were found between BaP of the suspeded matters and that of the falling matters in both seasons in case of collecting the dusts at the similar places and times (winter r=0.8016, summer r=0.8281).
2) In both cases (suspended matters' method and falling matters' method), BaP in this industrial city air in winter was more than that in summer.
3) In case of suspended matters, BaP in the industrial downtown district was more than that in the urban residential district in both summer and winter. And in case of falling matters, BaP in the former district was similarly more than that in the latter district in both seasons.View full abstractDownload PDF (1138K) -
Hisanori Nagata1966 Volume 21 Issue 4 Pages 279-283
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSSeveral difficulties in the descriptive epidemiology of school accidents which have been found through a study on accidents of primary school children have been discussed.
1. It is generally not easy to know the relative frequency of accidents in a given group of accidents or in a given situation of school life. This is because of lack of information available to determine the reference population (person-hours) in every group of children or in every situation of school life. Careful investigation of the school life of children will be necessary to get this information.
2. When accidents are classified into several groups according to a given factor to see the effects of the factor on characteristics of accidents, it must be kept in mind that these groups of accidents are not only different in respect to the given factor, but also different in respect to many other factors. The same consideration will be necessary in the comparison of the relative frequency of accidents among several groups of reference population classified according to one factor. These groups of reference population are not only different in the concerning factor, but also may be different in respect to many other factors. Some of the multivariate statistical methods may be useful to detect the effects of a given factor in such situations. Their proper application should be studied in the future.
3. The great variety in school accidents makes us suspect that various essentially different events are to be found mixed in school accidents. If such be the case, it might be unreasonable or at least unwise to study school accidents regarding them as a single group of events, thus trying to find the principle of accident causation common to all school accidents. It is recommended that the object of study be restricted to accidents in a specific group of children and in a specific situation of school life. When information obtained from these separately performed studies is accumulated step by step, the principle of accident causation common to all school accidents can finally be detected, if it is in existence.View full abstractDownload PDF (746K) -
Yukio Yamamura, Chise Nakajima, Yoshiro Kudo1966 Volume 21 Issue 4 Pages 284-289
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSAt a photo offset printing plant, several workers were exposed to tetra alkyl lead in considerable concentration. In this plant the leaded gasoline was used as the wiping solvent for the forme beds.
1) The lead concentration as tetra alkyl lead found in the gasoline was 0.4g per liter and the concentration in the gasoline vapor was 0.62g per liter.
2) The leaded gasoline concentration in the air of the plant was rather increased, since a new type of air conditioning installation had been set up and it caused poor ventilation in the room.
3) The concentration of lead in the blood of workers and their urinary excretions of coproporphyrine were elevated. Additionally, the number of stipple cells in blood were slightly increased.
4) Tentatively all persons were administered Ca-EDTANa2, and their urinary lead amount before and after the administration was compared. The result indicated that the amount of lead excreted in urine after the administration uniformly exceeded that before the administration.
From this observation, the preventive measures of the lead exposure have been discussed, and it has been emphasized that leaded gasoline should not be used as solvent at any working processes, for example, like this case, for the prevention of lead poisoning.View full abstractDownload PDF (2706K) -
The comparison of treating septic tank by sea water and city waterKennosuke Yuhi1966 Volume 21 Issue 4 Pages 290-295
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSBy investigation the gas and the sludge in a septic tank on purification of the sewage, theefficiency of the treatment by using sea water and by city water were compared.
The results were as follows:
(1) The digestible process of human excrements and the ammoniamizing process of nitrofraction in the first stage of the septic tank were more active in case of the sea water than of the city water. Thus the NH3-N and C.O.D. was maintained in high degree as the result of high solubility of the ammoniac nitrogen, the soluble sulfide and the organic acids to the sewage.
However the sewage through the second stage septic tank showed the low degree of the NH3-N and C.O.D.. This might indicate that dissolved substances were evaporated as NH3-, H2S-or CO2-gas or precipitated as metal binding suefide.
(2) In case of the sea water, the digestible process of human excrements was so rapid that the products of scum and sludge in the first stage septic tank were remarkabls small in quantity.
(3) In case of the sea water, the C.O.D. was maintained in high degree by increasing sulfide and the ratio of B.O.D. to C.O.D. was significantly low.
(4) In case of the sea water, the small quantity of formation of NO2 and NO3, and production of coloring and stinking substance in the sewage were observed. This might be due to reducing process of sulfide and the sufficient digestible process.View full abstractDownload PDF (793K) -
Part 5. Glutamine synthetase activity in the rat under the noise conditionChikara Sakaguchi1966 Volume 21 Issue 4 Pages 296-298
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSPrevious studies have shown that the ammonia content in the brain, liver and blood was elevated in the rat under the extremely noisy condition, and that the increase in the ammonia content was inhibited by the oral administration of glutamic acid or aspartic acid.
In this paper, the ability of the brain and liver to synthesize glutamine was investigated under the extremely noisy condition.
The adult male rats were exposed to 100∼105 phon noise characterized by wide octave band spectrum for 3 hours. Glutamine synthetase activity was determined by Kennan's method.
The results were as follows:
1. Glutamine synthetase activity was inhibited by the noise exposure in the brain and liver.
2. By the oral administration of glutamic acid or aspartic acid, glutamine synthetase was not accelerated in the brain, but did in the liver.
3. The oral administration of glutamic acid or aspartic acid did not cause the decrease in glutamine synthesis in the brain and liver under the noise condition.View full abstractDownload PDF (395K) -
Takahiko Sato1966 Volume 21 Issue 4 Pages 299-305
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSUsing the Warburg manometer, the author investigated the toxicity of metal ions on oxygen utilization of activated sludge and estimated TC50 (the concentration of toxic substance required to obtain 50% inhibition of the oxygen utilization of unintoxicated sludge)
1) The toxicity of the ions to activated sludge showed the tendency of decrease in the following order: Cu++, Ag+, Hg++, Ni++, Cd++, Zn++, Co++, Cr+++, Cr+6, and Pb++.
2) Detoxication effect by EDTA salt was found in case of Cu++, Ni++, Zn++, Pb++, Cd++ and Co++. However in Hg++, Ag+, Cr+++, Cr+6, the effect was negligible.View full abstractDownload PDF (699K) -
Distribution of 95Zr-95Nb among organs and autoradiographies of tibia for subcutaneously injected albino ratsToshiko Morishige1966 Volume 21 Issue 4 Pages 306-312
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSAs previously reported 95Zr-95Nb were detected in fallout and vegetation in consequence of the nuclei explosion.On a point of view for biological effect of 95Zr-95Nb to animal, these radioactive materials were quantitatively injected subcutaneously to rats. These rats were sacrificed respectively at 5 hours, 24 hours, 7 days, 14 days, 28 days and 63 days after the administration. After that, the distribution of 95Zr-95Nb for main organs and tissues were determined and also radioactivities of them in the urine and in the feces were persuited for a long period after injection. Autoradiography of tibia for the victims were taken with a macro-contact method in order to observe locality and turnover for 95Zr-95Nb in the tibia.
The results obtained were as follows;
1. In the period of the experiments, the radioactivities for 95Zr-95Nb were extremely detected in the tibia rather than in the other organs and tissues. The next highly deposited tissue of them was an upper incisor. But radioactivities of them in main organs except tibia were approximately same level at the 63th experimental day through biological turnover and excretion.
2. Amounts of 95Zr-95Nb in both urine and feces among experimental rats were the most mainly excreted in them within 24 hours after injection. After that, these amounts of 95Zr-95Nb excreted in urine and feces per 24 hours gradually decreased day by day and had been kept on at about same level from the 14th experimental day to the end of the experiments. Amount of the substances mentioned above was generally larger in urine than in feces through the experimental period.
3. It could be considered from the result of autoradiographic study for the tibia in the experiments that; firstly, 95Zr-95Nb were remarkably deposited into a part of metaphysis close to epiphysis line in the initial stage, the 5th experimental day, and were consequently accumulated into metaphysis rather than into both epiphysis and diaphysis. Secondly, at the 14th experimental day, they released from the metaphysis close to epiphyseal line but their depositions at the part of epiphysis did not so remove.
Thirdly, at the 63th experimental day, they had still deposited into the epiphysis.View full abstractDownload PDF (3436K) -
Yohji Shiraishi, Seiichi Onozuka, Jun Inahara, Harutaka Takemasa, Dait ...1966 Volume 21 Issue 4 Pages 313-321
Published: October 10, 1966
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSSome measures to counter car accident have been taken from various angels in recent times, while their epidemiological consideration has not sufficiently been given. The presentation here is a study on the latter problem.
Three elements have to be taken into account when car accident is to be investigated epidemiologically; first, car traffic itself, secondly what is related to main constituent factors such as driver's mental and physical fatigue or difficulties, and thirdly what is concerned with environmental factors such as road conditions, traffic jam, and effect of lighting.
Present subject has been concentrated on the significance of smog as one of the links of environmental factors in causing car accident. For this purpose authors took up car accidents which occurred within the circle of two kilometer at the central Tokyo, its center being the Japanese Meteorological Observatory where smog has been observed scientifically. Data are based upon the 1960∼1962 meteorological observation records field in the Japanese Meteorological Observatory and upon the traffic accidents records registered by policemen. Since smog occurs more frequent in January and December, available data were recorded in both months in 1960∼1962.
The following are the results authors obtained in connection with the relationship between the smog and the car accidents.
1) The smog fosters car accidents during 3 hours from 9 to noon and 4 hours from 5 to 9 in the evening.
2) The higher is the effective temperatuae the higher is the frequency of car accident.
3) High rate of car-accident is observed between 17 to 21 hours below 30°ET, and above 40°ET high accident frequency is seen when there is no smog. At 30° to 39°ET high frequency is observed when there is no smog. While human injuries are more caused when ET is higher than 40° with smog during 3 hours to noon, but during 4 hours around the sunset time it is high when smog is prevailling especially slight human injuries are seen oftener.
4) In terms of weather and effective temperature, the accident rate is higher when it is rainy and below 30°ET.
5) The rate of accident is high when it is below 30°ET, smoggy and rainy, and if it is above 40°ET the rate is high when it is fine so far as it is smoggy, but under the same condition the rate of slight human injuries are high when it is raining. If it is 30° to 39°ET, slight human iujuries are oftener met when it is fine so far as it is smoggy.View full abstractDownload PDF (986K)
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