Netsu Sokutei
Online ISSN : 1884-1899
Print ISSN : 0386-2615
ISSN-L : 0386-2615
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Volume 18, Issue 1
Displaying 1-6 of 6 articles from this issue
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  • Thermodynamic Properties of Dimethylacetamide+Alkane Mixtures at 298.15K
    I. Excess Molar Enthalpy, Excess Molar Volume and Excess Isothermal Compressibility
    Hiroki Inoue, Hideo Ogawa, Katsutoshi Tamura, Sachio Murakami
    1991 Volume 18 Issue 1 Pages 3-8
    Published: January 30, 1991
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.18.3
    JOURNAL FREE ACCESS
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    Excess enthalpies, excess volumes, and excess isentropic and isothermal compressibilities, have been determined at 298.15K for binary mixtures of dimethylacetamide (DMAC)+an alkane (CnH2n+2, n=6∼9) and+cyclohexane. The phase separation was found for these mixtures, except for the cyclohexane mixture. Excess volumes are positive for these mixtures, except for the higher mole fraction of the hexane mixture. On the other hand, excess compressibilities for these mixtures are large and negative. This is unusual behavior in relation of excess volume to excess compressibilities. The results are discussed in terms of contributions from not only the dipolar-dipolar interaction in addition to the dispersional interaction but also the change of the molecular packing between the pure and the solution states.
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  • Calorimetry of Cellular Processes: With Special References to Quantitative Evaluation of Drug Action on Microbial Cells
    Katsutada Takahashi
    1991 Volume 18 Issue 1 Pages 9-18
    Published: January 30, 1991
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.18.9
    JOURNAL FREE ACCESS
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    It has been long my view that the biocalorimetry is perhaps most effectively used for the kinetic analysis of microbial cultures. This paper is a review article of the research works conducted mainly in the author's group and deals with our method for the calorimetric characterization of the biological effects of drugs and other chemicals on metabolic activities of living cells. The same principle was also adapted to a quantitative estimation of food putrefaction and of environmental pollution studies. The article also includes a proposal to determine calorimetrically the germination activity of plants seeds with the conclusion that our calorimetric method can be used for the quantitative investigation of the viable activity of various cellular processes.
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  • Thermal Properties of Starch-Water System
    Toshiko Shiotsubo
    1991 Volume 18 Issue 1 Pages 19-27
    Published: January 30, 1991
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.18.19
    JOURNAL FREE ACCESS
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    Thermal properties of starch-water system which were mainly studied in our laboratory are reviewed. The heat of swelling, the differential heat of swelling, the heat of gelatinization and the change of heat-capacity with gelatinization were estimated by calorimetry. The heat of gelatinization and characteristics of gelatinization were determined by thermal analysis. At a heating rate slower than 0.5K min-1 gelatinization state is in equilibrium, accordingly, excess heat-capacity curve were obtained by thermal analysis in this condition. From excess heat-capacity curve, van't Hoff enthalpy of gelatinization of starch was determined, and from the rate of the calorimetric enthalpy and the van't Hoff enthalpy, the size of cooperative unit was estimated.
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  • Absolute Hydration Enthalpies of Ions
    Minoru Sakiyama, Yatsuhisa Nagano
    1991 Volume 18 Issue 1 Pages 28-33
    Published: January 30, 1991
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.18.28
    JOURNAL FREE ACCESS
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    A critical review on absolute hydration enthalpies of ions derived by various methods is presented. Definitions on absolute and conventional hydration enthalpies are presented. Values based on the TATB extrathermodynamic hypothesis, those from electrochemical methods, those from gas phase thermodynamic measurements on ion-water molecule association, those from computer simulations, and those based on a physical model for hydrated ion clusters, are discussed. Thermochemical studies on tetra-alkylammonium halides carried out by the authors are briefly summarized in relation to the present topic.
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  • Heat Productions for the States of Organisms
    from Observations to Measurements
    M. Yamamura
    1991 Volume 18 Issue 1 Pages 34-37
    Published: January 30, 1991
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.18.34
    JOURNAL FREE ACCESS
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  • Quantitative Analysis of TG and DTA
    T. Hayama
    1991 Volume 18 Issue 1 Pages 38-40
    Published: January 30, 1991
    Released on J-STAGE: September 07, 2009
    DOIhttps://doi.org/10.11311/jscta1974.18.38
    JOURNAL FREE ACCESS
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