Eisei kagaku
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Volume 11, Issue 4
Displaying 1-13 of 13 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 11 Issue 4 Pages 213-217
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.213
    JOURNAL FREE ACCESS
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  • Researches on Smoke Injury by Fluoric Compound From a Tile Factory
    Tamesaburo Matsui, Taro Ogiso
    1965 Volume 11 Issue 4 Pages 218-223
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.218
    JOURNAL FREE ACCESS
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    A smoke injury occurred in Gifu prefecture in May, 1964, by which silkworms reared with mulberry leaves around a tile factory were late in their growth, failed to cocoon or died. To find out the cause of this injury, raw materials of tile, air, flue gas, mulberry leaves, silkworms and deposited dust were analyzed. The amounts of sulfur oxides, lead and arsenic in flue gas and in mulberry leaves were too small to cause the injury. In air around the factory, fluorine was found at the rate of 0.001-0.035 mg/day/100 cm2 absorbing paper, and the amount of fluorine increased with the degree of injury to silkworms. The most contaminated mulberry leaves contained 30 mg of fluorine per 100 g of dried leaves, and the fluorine content was 15-20 times higher than the normal leaves. The fluorine contents of green body and glaze were found to be 13 and 56 mg/100 g, respectively, and 55-80% of fluorine in these raw materials was volatilized by firing in the course of tile manufacturing. From the results of this research, it is concluded that the volatilized fluorine might be the cause of the smoke injury.
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  • Studies on the Standardization of Analytical Method for Hydrogen Chloride in Atmosphere of Manufacturing Districts
    Yoshitaka Kobayashi, Tadashi Shirai
    1965 Volume 11 Issue 4 Pages 224-229
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.224
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    This investigation was carried out for the purpose of establishment of standard analytical method for hydrogen chloride in air, especially, in manufacturing districts. Conditions for collection of hydrogen chloride from air and analytical method for collected chloride in bubbler were studied. As the results of the experiments, the most suitable condition was found, that is, sample air was passed at the speed of 1∼3 L/min. through 10 ml of water in fritted glass bubbler (volume 50 ml). And, mercuric thiocyanate method was recognized as the most suitable method for collected chloride in the bubbler as the standard analytical method. Hydrogen chloride in air (above 0.05 ppm) was determined using 100 L of air by this method. In the case of using connecting tubings, glass tubing or vinyl chloride tubing showed the best result, but rubber tubing was not good because of adhesion of hydrogen chloride on the surface.
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  • Analysis of Antioxidants by Gas Chromatography
    Yasuko Haranoh, Yasushi Takeda, Otomatsu Hoshino, Tyunosin Ukita
    1965 Volume 11 Issue 4 Pages 230-234
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.230
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    A gas chromatographic analysis of five synthetic antioxidants BHA (tert-butyl hydroxy anisole), BHT (di-tert-butyl hydroxy toluene), EP (ethyl protocatechuate), PG (propyl gallate), and IAG (isoamyl gallate) is described. BHA and BHT were detected without any chemical treatment with a column containing 2.5% SE-30 and 1.5% Carbowax 20M as a stationary phase. EP, PG and IAG were not detected without masking of OH groups. They were acetylated and the acetyl derivatives were completely separated with a column containing 20% SE-30 as a stationary phase. Using benzophenone as an internal standard, calibration curves for the assay were prepared. EP in soybean oil was determined with the mean recovery of 97.6% and with a standard deviation of 3.8%.
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  • Hygienic and Chemical Studies on Effluent Water (II) Study on Digester of Slaughter-house
    Yasuyoshi Sayato, Motoo Toyoda, Michiko Nakata, Haruyo Tomobe, Hideo S ...
    1965 Volume 11 Issue 4 Pages 235-239
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.235
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    Treatment of waste water of slaughter-house with activated sludge system was investigated and the following results were obtained. It was found necessary to average the amount of filth in waste water in the storage tank bofore the digestion in the aeration tank. Preaeration of waste water by mechanical stirring before treatment with activated sludge was not so effective. In the experiment of aeration tank and test plant, the digestion proceeded rapidly after three hours'aeration with activated sludge. When the first aeration could not give satisfactory effect, subsequent second aeration was performed for further three hours and afforded good result.
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  • Chemical Studies on Hot Springs (VIII) : Changes in Main Components with the Lapse of Time
    Tokuichi Miyanaga
    1965 Volume 11 Issue 4 Pages 240-244
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.240
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    Analyses of components in five hot springs in Iizaka were performed in alternate months for a year from Feb. in 1964. The results showed that the main components were on the decrease and remarkably influenced, as well as the values of K/Na and Ca/Mg, with the "Niigata earthquake"which happened on June 16th in 1964.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1965 Volume 11 Issue 4 Pages 245-247
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.245
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1965 Volume 11 Issue 4 Pages 249-254
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.249
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 11 Issue 4 Pages 254-256
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.254
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 11 Issue 4 Pages 259-260
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.259
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 11 Issue 4 Pages 261
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.261
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 11 Issue 4 Pages 262-266
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.262
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1965 Volume 11 Issue 4 Pages 266-271
    Published: December 30, 1965
    Released on J-STAGE: May 30, 2008
    DOIhttps://doi.org/10.1248/jhs1956.11.266
    JOURNAL FREE ACCESS
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