Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
Volume 19 , Issue 5
Showing 1-7 articles out of 7 articles from the selected issue
  • [in Japanese]
    1966 Volume 19 Issue 5 Pages 257-263
    Published: 1966
    Released: February 19, 2013
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1966 Volume 19 Issue 5 Pages 263-267
    Published: 1966
    Released: February 19, 2013
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1966 Volume 19 Issue 5 Pages 268-273
    Published: 1966
    Released: February 19, 2013
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1966 Volume 19 Issue 5 Pages 274-278
    Published: 1966
    Released: February 19, 2013
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1966 Volume 19 Issue 5 Pages 279-283
    Published: 1966
    Released: February 19, 2013
    JOURNALS FREE ACCESS
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  • Yoshimichi MAEDA, Takatsugu AZUMI, Shiro TAKASHIMA
    1966 Volume 19 Issue 5 Pages 283-287
    Published: 1966
    Released: February 19, 2013
    JOURNALS FREE ACCESS
    A study was conducted on the application of a thermobalance to the quantitative analysis of monosodium glutamate contained in table-salt.
    The thermogram of monosodium glutamate indicates two weight losses at about 140-490°C and above 200°C, which correspond to dehydration and degradation, respectively. The initial weight loss due to dehydration of monosodium glutamate was proportional to its content in the mixture with sodium chloride.
    From the quantitative treatment of the mixture a good result was obtained by using the ground sample at the heating rate of 4°C per minute. However, the dehydration temperature obtained was somewhat inaccurate in comparison with the values obtained by the differential thermal analysis, because the temperatures of the sample could not be measured directly by the apparatus used in the present work.
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  • Tadao HAKUSHI, Takatsugu AZUMI
    1966 Volume 19 Issue 5 Pages 288-291
    Published: 1966
    Released: February 19, 2013
    JOURNALS FREE ACCESS
    The permeability of sulfate ions through an anionselective membrane is lower than that of chloride ions. This is, in general, considered chiefly due to their strong interaction with exchange groups in the resin phase.
    In order to know how this interaction contributes to the permselectivity of sulfate ions, the authors prepared the Vinylon membrane possessing no exchange groups and measured the permse-lectivity of sulfate ions against chloride ions by electrodialysis experiments by using a seven-comp-artment apparatus equipped with the Vinylon membranes and cation-selective membranes. The results were compared with the data obtained from the use of an ordinary anion-selective membrane.
    As the result, it was found that the values of the permselectivity coefficient of sulfate ions were 0.015-0.03 for the Vinylon membrane and much lower than the values for the anion-selective membrane. This indicated that the Vinylon membrane made it more difficult to permeate sulfate ions than the anion-selective membrane.
    From the above results, it was concluded that the preferential impermeability of sulfate ions through membranes was influenced by not only by the extent of the interaction with the exchange groups, but largely influenced by the compactness of the pore structure of the membranes.
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