Review of Polarography
Online ISSN : 1884-7692
Print ISSN : 0034-6691
ISSN-L : 0034-6691
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Volume 52, Issue 1
Displaying 1-7 of 7 articles from this issue
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Preface
Review Articles
  • Standard potentials for the transfer of ions at the oil/water interface
    Toshiyuki OSAKAI
    2006 Volume 52 Issue 1 Pages 3-12
    Published: May 31, 2006
    Released on J-STAGE: May 02, 2008
    DOIhttps://doi.org/10.5189/revpolarography.52.3
    JOURNAL FREE ACCESS
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    The standard potential of ion transfer at the oil/water interface (ΔowΦi°), which is related to the standard Gibbs energy of ion transfer (ΔG°,tr,io→w) by ΔowΦi° = -(ΔG°,tr,io→w/ziF) (zi, the ionic valence), is important for understanding the distribution behaviors of ions for ion-selective electrodes, solvent extraction, membrane transport, etc. In this review, literature values of ΔowΦi° have been compiled for various ions. A few topics relevant to ΔowΦi° have also been addressed, which include new methods for the determination of ΔowΦi° and a water | oil | water thermocouple for determination of the entropy of ion transfer at the oil/water interface.
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  • Microbial vitality measurements based on bioelectrocatalysis
    Tetsuya KONDO
    2006 Volume 52 Issue 1 Pages 13-22
    Published: May 31, 2006
    Released on J-STAGE: May 02, 2008
    DOIhttps://doi.org/10.5189/revpolarography.52.13
    JOURNAL FREE ACCESS
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    Rapid estimation of microbial population and vitality is important for ensuring product safety and quality in food and fermentation industry. This paper reviews microbial vitality measurements based on mediated bioelectrocatalysis. We have developed an amperometric method for measuring substrate-oxidizing activity of intact microbial cells and have applied to the estimation of vitality of microorganisms. The response of the electrode was related to the microbial oxidation activity, which was related to the vitality of the cells. The method was also applied to evaluate heat or bactericidal stress against microbial cells. The comparison of the present method and conventional colony counting revealed the appearance of injured cells that were active in the present method but not in the colony counting. The method was proved to be a useful tool in the fields of microbiology and food science.
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  • The Compounds Which Are Adsorbed on Mercury Electrodes II -Pyridine, Quinoline and Related Compounds (Review)
    Hiromiti Sawamoto
    2006 Volume 52 Issue 1 Pages 23-33
    Published: May 31, 2006
    Released on J-STAGE: May 02, 2008
    DOIhttps://doi.org/10.5189/revpolarography.52.23
    JOURNAL FREE ACCESS
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    The author reported a review to make a part of the data book of the compounds which are adsorbed on mercury electrodes (Sawamoto, 2005). In the previous review, adsorption parameters, such as relative surface excess, isotherm, standard free energy of adsorption, were described without any explanation of them. In this review at first such adsorption parameters are briefly explained. The adsorption and adsorption parameters of pyridine, quinoline and their derivatives are described.
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