All issues
Successor
Volume 12, Issue 2
Displaying 1-12 of 12 articles from this issue
- |<
- <
- 1
- >
- >|
-
[in Japanese]1966 Volume 12 Issue 2 Pages 61-68
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSDownload PDF (952K) -
Goroku Ohta, Yoshitomo Uno, Riichiro Iwaki, Haruo Saito1966 Volume 12 Issue 2 Pages 69-82
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSRecently it was reported that D-arabonolactone (AL), when mixed with meat sausage at the ratio of 1 : 200, reduces the pH and prevents effectively from its decay. It is known that in an aqueous solution AL hydrolyzes to D-arabonic acid, until they reach the equilibrium. For tho purpose of knowing the acute and subacutetoxicity of AL and AA, this experiment was carried out using approximately 200 young inbred mice of both sexes. Seven days LD50 of AL was 13.3-10.6 g/kg and that of AA was 10.1-7.8 g/kg. In the experiment of acute intoxication, high doses groups (1/2.5 LD50 per day for 7 days) of both drugs showed slightly retarded growth curves compared with that of control. There was no abnormal growth curve in other groups of both drugs. In the subacute intoxication series, retarded growth curve was observed only in AA high doses group (1/4 LD50 per day for 3 months). During the experiment of the subacute intoxication of both drugs, 2 out of 60 mice were died spontaneously. The one belonged to AL high doses group and the other to AL middle doses group. Histological examination of all groups of mice, either AL-or AA-treated and acute or subacute, revealed no significant changes in any organs, which seemed to be produced by the ingested drugs.View full abstractDownload PDF (2564K) -
Seitaro Iki1966 Volume 12 Issue 2 Pages 83-86
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThere has been no good method of disinfection for vegetables. Therefore, the vacuum method was developed, and was compared with other conventional methods. From the results of experiments, it was concluded that the vacuum method was the most effective method of disinfection for vegetables.View full abstractDownload PDF (638K) -
Yoshitaka Kobayashi, Genichiro Yasue, Shoji Uchiyama1966 Volume 12 Issue 2 Pages 86-89
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSFor the rapid determination of SeH2, several granular gels which change colors when exposed to air containing small amount of SeH2 were investigated. Purified silica gel impregnated with gold chloride was found to be a most sensitive and stable reagent for SeH2. The gel was placed in a glass tubing and the sample air was drawn through the tube with constant flow rate, and the quantitative estimation was possible by measuring the length of colored zone. The mean relative error was within 5%. The measurable range were as follows : (1) SeH2 : 10-600 ppm when sample volume was 100 ml, and feeding time 3 min. (2) SeH2 : 1-100 ppm when sample volume was 500 ml, and feeding time 15 min.View full abstractDownload PDF (648K) -
Otomatsu Hoshino, Keiko Tanzawa, Yoshinari Hasegawa, Tyunosin Ukita1966 Volume 12 Issue 2 Pages 90-93
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESS1) The mercury content in the hairs of normal persons, who resided in Japan and other countries, was estimated by dithizone, method. 2) The average value obtained from 73 different samples taken from residents in Japan was about 6 ppm, and that of 30 samples from several other countries was about 2 ppm. 3) The mercury content in the hairs of Japanese students, who stayed abroad for over 1.5 years, was almost same as the average value of native population. 4) After returning to Japan, the mercury content in the hairs of these students gradually increased and restored to the value of residents in Japan at the end of one or two years. 5) The difference and the gradual increase of mercury content in the hairs, therefore, may depend on residential environments.View full abstractDownload PDF (518K) -
Otomatsu Hoshino, Keiko Tanzawa, Tadao Terao, Tyunosin Ukita, Atsuhiro ...1966 Volume 12 Issue 2 Pages 94-99
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSActivation analysis was applied for quantitative determination of mercury in hair and the data obtained were compared with those by colorimetric method using dithizone. The analyses of the materials sampled from individuals residing in Japan and in other countries were performed and it was found that the non-destructive analysis is a desirable method for the purpose in giving accurate results even for the samples which are unsuitable for the colorimetic analysis because of the small contents of mercury, and especially when a lot of samples are to be analysed within a limited time. The distributions of mercury along the length of long hairs obtained from "Minamata diseased" patients and thir families in Niigata prefecture were determined by non-destructive method and interesting results were obtained.View full abstractDownload PDF (760K) -
Otomatsu Hoshino, Keiko Tanzawa, Seiho Hayashi, Tyunosin Ukita1966 Volume 12 Issue 2 Pages 100-105
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSMicro-analysis of ethyl ether in forensic chemistry was investigated. Gas-liquid chromatography was employed for detection of ethyl ether from biological fluids. As pre-treatment, ethyl ether was extacted with n-propyl- or butyl-acetate. Cyclohexane was conveniently used as an internal standard. It was found that the method was available for quantitative analysis of ethyl ether in biological fluids. Micro diffusion method and Widmark's method were also investigated for quantitative determination of ethyl ether, and it was found that both, especially the later, gave good results. Several forensic applications of these methods were also discribed.View full abstractDownload PDF (643K) -
Yoshikazu Matsushima, Toshiko Noguchi1966 Volume 12 Issue 2 Pages 106-108
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe Minamata disease is known since 1953 as an organic mercury intoxication, mainly among fishermen along the Minamata Bay, Kumamoto Prefecture, by eating seafoods contaminated with organic mercury compounds. In connection with the disease the mercury content in hair of the coastal residents of the Shiranui Sea was determined. By using the samples in which high contents were noted, the critical determinations were made by cutting the hair in 3 cm portions from the base and consequently remarkably uneven distributions of the mercury along the length were observed. The portions of hair with unusually high contents of mercury were presumed to grow during the uptake of the contaminated food. The application of this method to the residents of the contaminated area will be useful for better speculation of the period of contamination.View full abstractDownload PDF (466K) -
Yoshio Kurayuki, Yasuhisa Mizunoya, Shinzo Yamada1966 Volume 12 Issue 2 Pages 109-112
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSArsenic dissolved from the Kjeldahl flask is a very cumbersome problem in the arsenic determination. When new Kjeldahl flasks for arsenic determination were heated with the mixture of sulfuric acid and nitric acid, the considerable amounts of arsenic were detected in these acid solutions. After washing of flasks with various kinds of acid or alkali, the amounts of arsenic dissolved from flasks were determined. As a result of experiments, it was proved that a new Kjeldahl flask should be washed for four or five times, before use, by heating with sulfuric acid and nitric acid. Boiling with sodium carbonate solution was found to be the more effective washing method.View full abstractDownload PDF (559K) -
Kiyoshi Hirayama, Yuko Kawakami, Takako Oishi1966 Volume 12 Issue 2 Pages 112-113
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSUsing an ordinary apparatus of Fresenius von Babo shown in Fig. 1, some amount of chlorine leaks out of the glass tube. In the experiment with an apparatus shown in in Fig. 2, a great quantity of city water should be spent. So the apparatus in Fig. 3 is preferable ; the Na2S2O3 solution in the Erlenmeyer flask absorbs chlorine and the glass tube B leads air into the flask automatically in case of minor pressure.View full abstractDownload PDF (328K) -
Keiiti Sakai1966 Volume 12 Issue 2 Pages 114-119
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSThe pesticide residues in grapes, grape juice and apples were determined as well as the analysis of pesticides on the cloths of person engaged in spraying. Amount of the residue of parathion on the cloths of worker showed the tendency to be larger in the case of rice fields than orchards. Fresh grapes were recognized to contain very little amount of heavy metal residue such as As, Cu and Pb, but the grapes to be used as a raw material of grape juice were cnsiderable contaminated with As. Apples grown without covering retained, especially in their cavity of core, relatively large amount of As and Pb, which could not be removed by the conventional washing.View full abstractDownload PDF (666K) -
Masaharu Tonomura, Minoru Nanjo, Shizuo Kano1966 Volume 12 Issue 2 Pages 119-120
Published: April 30, 1966
Released on J-STAGE: May 30, 2008
JOURNAL FREE ACCESSFor the purpose of comparing air pollution in urban and rural area by the automotive exhaust gas, Pb concentration in the hair of regional inhabitants was examined and the following results were obtained. 1. In the determination of Pb in hair, it was found that the amount was larger in female than in male. 2. As for the difference in Pb concentrations by regions, the average and maximum values were larger in inhabitants in Tokyo than those in rural areas. 3. As for the difference in Pb concentrations by occupations, the average and minimum values were larger in traffic policemen in Tokyo than in men of other occupations in the same city.View full abstractDownload PDF (365K)
- |<
- <
- 1
- >
- >|