Bulletin of the Society of Sea Water Science, Japan
Online ISSN : 2185-9213
Print ISSN : 0369-4550
ISSN-L : 0369-4550
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Volume 68, Issue 5
Displaying 1-9 of 9 articles from this issue
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Greeting
Special Issue : “Current Status and Future directions of Ocean Energy Development”
Introduction
Commentary
Original Paper
  • A Novel Preparation Scheme for Cesium-Adsorptive Fibers to Raise the Impregnation Percentage of Insoluble Cobalt Ferrocyanide
    Shota GOTO, Wataru AMAKAI, Kunio FUJIWARA, Takanobu SUGO, Takashi KOJI ...
    2014 Volume 68 Issue 5 Pages 298-304
    Published: 2014
    Released on J-STAGE: September 14, 2015
    DOIhttps://doi.org/10.11457/swsj.68.298
    JOURNAL FREE ACCESS
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    Anion-exchange fiber was prepared by means of radiation-induced graft polymerization of glycidyl methacrylate onto 6-nylon fiber, followed by a reaction with triethylenediamine (TEDA). Ferrocyanide ions ([Fe (CN)6]4－) were bound to the anion-exchange fiber with potassium ferrocyanide solution before the fiber was immersed in cobalt chloride solution. The resultant insoluble cobalt ferrocyanide microcrystals were immobilized by the TEDA-introduced polymer chain grafted onto the 6-nylon fiber. The impregnation percentage of insoluble cobalt ferrocyanide onto the fiber amounted to 12％, which was approximately two-fold higher than that of previous cesium-adsorptive fiber. The higher percentage impregnation of the fiber resulted in higher adsorption capacity for cesium ions in seawater.
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Short Paper
  • Importance of Mg2＋ for the Growth of the Halotolerant Bacillus sp. TSK2
    Haruo MIMURA, Takuya SHIMOMURA
    2014 Volume 68 Issue 5 Pages 305-306
    Published: 2014
    Released on J-STAGE: September 14, 2015
    DOIhttps://doi.org/10.11457/swsj.68.305
    JOURNAL FREE ACCESS
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    The growth rate of Bacillus sp. TSK2 increased when Mg2＋ was externally added to LB medium at 25 ℃ and showed the maximum value, 0.82 （Doubling time h－1）, at 50 mM. While the growth rate was repressed to 0.12 in the presence of 1.0 M NaCl in the medium, the value increased to 0.59 at the same concentration of NaCl, and the growth ability expanded to 3.0 M when 50 mM Mg2＋ was added to the medium. These results indicate that the strain possesses transport system (s) with relatively low affinity to Mg2＋, and a concentration of Mg2＋ similar to that in seawater plays an important role in growth under high NaCl stress.
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