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Volume 29 (1974 - 197･･･
- Issue 6 Pages 543-
- Issue 5 Pages 483-
- Issue 4 Pages 429-
- Issue 3 Pages 359-
- Issue 2 Pages 275-
Volume 29, Issue 6
Displaying 1-5 of 5 articles from this issue
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Shiro Adachi, Toshiteru Okubo1975 Volume 29 Issue 6 Pages 543-551
Published: February 28, 1975
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSAfter obtaining information from the National Health Insurance bills, comparative study of the relationship between air pollution and respiratory disease was made for two small areas in Tokyo; Kojiya as a highly polluted area of 6, 766 insurants and Hachioji as a contrast area of 8, 735 insurants. All the bills of above insurants demanded during 1971 were used. The result of comparison between Kojiya and Hachioji is as follows. The age adjusted incidence (average frequency of new consultation per person per year) of respiratory diseases of all kinds were higher in Kojiya for both sexes. Also the incidence of auricular diseases and injuries were higher in Kojiya, but those of skin and motor organs were the reverse. Among respiratory diseases, common cold in infants, bronchitis both acute and chronic in advanced ages and rhinitis in all ages were more frequent in Kojiya. Male were found to contract chronic bronchitis at earlier ages in Kojiya. It was also interesting to note that under 20 years of age, otitis media most of which must have the same source of infection as upper respiratory infection was more frequent in Kojiya.
Furthermore, biasses or inaccuracies bound to the bills were analyzed to confirm the reliability of the result and to discuss the limitation as a source of morbidity information.View full abstractDownload PDF (1323K) -
Kikuo Fujiwara, Toyoki Sugiyama, Kazuko Koike, Kenkichi Oba1975 Volume 29 Issue 6 Pages 552-557
Published: February 28, 1975
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSA river model for measuring the biodegradability of organic materials was devised simulating the natural aquatic environments. Applying this model, the biodegradabilities of linear alkylate sulfonates (LAS) were determined by the methylene blue method and UV-spectrophotometry
1) LAS added to the concentration of 10ppm has shown to be removed almost completely in twenty days of operation from the water fractions and bottom sludge layers by determination with methylene blue method. The UV-spectrophotometry revealed, however, the residue of about 40% in water fractions and about 25% in bottom sludge lagers even after the experiment. The discrepancy of these biodegradabilities might be due to the difference between the principles of the determination methods.
2) Among the LAS compounds containing alkyl chains in the range from C10 to C14, the substrates having alkyl chains of C10 were degradated most slowly and the compounds with the chains of C14 disappeared most rapidly.
3) LAS compounds having phenyl radicals near the terminal part of the alkyl chains could be decomposed easily. On the contrary, it was difficult to attack them the phenyl radicals were bound to the inner part.View full abstractDownload PDF (775K) -
Masaharu Yamamoto, Gen-ichi Watanabe1975 Volume 29 Issue 6 Pages 558-562
Published: February 28, 1975
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSIn relation to maternal age reproductive performance and embryonic chromosome constitution were investigated in CF#1 mice. Decreased pregnancy rate and litter-size reduction occurred with advancing maternal age. Among 446 day-10.5 embryos obtained from 77 pregnant females aged 2-16 months old, 13 (2.9%) had aneuploidy and 4 (0.9%) triploidy, respectively. An increase of aneuploidy was found with advancing maternal age, but the production of triploidy was not related to maternal age.View full abstractDownload PDF (572K) -
Part 2. Analysis of Bacteria in the Air by the Impinger MethodHidehiko Nakata, Masayoshi Yokota, Tadao Kawarabayashi1975 Volume 29 Issue 6 Pages 563-567
Published: February 28, 1975
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSThe airborne bacteria were investigated by the Impinger method and Koch's method in order to elucidate the significance of bacterial aerosol in ordinary living environments from the viewpoint of environmental medicine.
1. There was a correlation between the number of indoor airborne bacteria by the Impinger method and by Koch's method in the state after the students left the classroom, while there was no correlation during their stay in the room.
2. The number of bacteria after they left the room by the Impinger method was less than the number during their stay in the room.
3. The percentage of isolation of staphylococci from the indoor airborne bacteria by the Impinger method was about 15%.
4. In the airborne staphylococcus strains by the Impinger method, coagulase-positive strains were very few, while deoxyribonuclease-positive strains reached about 25%.
5. In deoxyribonuclease-positive strains of airborne staphylococci, alpha-lysin, beta-lysin and deltalysin by plate assay were found in a very high percentage, and in deoxyribonuclease-negative strains these hemolysin were also found.
The existence of pathogenic staphylococci in the indoor bacterial aerosol should be considered to be a valid indicator of carrier-borne bacterial contamination in living environments. These results indicate that the Impinger method would be adequate for the quantitative analysis of airborne bacteria, and both the hemolytic test by plate assay and the deoxyribonuclease test would be valuable as a screening test of pathogenic staphylococci.View full abstractDownload PDF (549K) -
Noriyoshi Yamashita, Makoto Doi1975 Volume 29 Issue 6 Pages 568-580
Published: February 28, 1975
Released on J-STAGE: February 17, 2009
JOURNAL FREE ACCESSFinally, 19 years after the incidence of poisoning by arsenic tainted Morinaga Dry Milk, the permanent relief work has been just started for the sufferers.
How to treat nonregistered sufferers, i. e. sufferers who were not registered by the Ministry of Health and Welfare in the Morinaga Dry Milk poisoning incident, is a very important problem.
In order to clarify the cause and actual state of nonregistered sufferers, a study was carried out using the data of Kyoto follow-up survey (Jap. J. Hyg. Vol. 27, No. 4, 364-399, 1972) and many medical reports about Morinaga Dry Milk poisoning.
Results are summarized as follow:
1) The nonregistered sufferers' group consisted of relatively younger patients who had slighter symptoms than the registered sufferers' group in the those days.
2) On the data of the Kyoto follow-up survey by the Kyoto Prefecture, nonregistered sufferers' group had as many physical and mental complaints as the registered group, and the state of the nonregistered group was similar to that of the registered group.
3) The criteria for diagnosis of the poisoning by the Nisizawa committee and the treatment by the Ministry of Health and Welfare and municipal governments for sufferers in those days were inadequate.
4) The occurrence in nonregistered was foundamentally caused by the fact that the sufferers were registered on the basis of the criteria for the diagnosis of the poisoning, but not on the basis of drinking the arsenic tainted Moririnaga Dry Milk.
5) That is the question, why doctors in those days did not take a serious view of the fact that no man had heretofore ever experienced such mass arsenic poisoning in infants and that many of the sufferers were infants who were physically and mentally in the developing process, and they came to a conclusion according to the medical well-known knowledge of arsenic poisoning in those days.
6) One should pay attention to the fact that the damage of sufferers consisted not only of physical damage but also of psychological or socieoecnomical damages.
If the official registeration of sufferers is made only according to the criteria for the clinical diagnosis of the poisoning, nonregistered sufferers can be produced inevitably in any public nuisance.
7) The officical registration of sufferers must be based on the fact that they had been drinking the arsenic tainted Morinaga Dry Milk in those days.
Many of the nonregistered sufferers can not show any evidence of drinking aresenic tainted Morinaga Dry Milk because government and medical officers have disrecorded such evidence in the past. So, nonregistered sufferers should be registered on the basis of their families' verbal evidences.View full abstractDownload PDF (2106K)
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