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Volume 11 (1984)
- Issue 4 Pages 157-
- Issue 3 Pages 97-
- Issue 2 Pages 51-
- Issue 1 Pages 3-
Volume 11, Issue 4
Displaying 1-8 of 8 articles from this issue
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Application to Measurements of Heat of Ca2+-Association with Ca2+-Binding ProteinsMasaru Tanokura, Kazuhiro Yamada1984 Volume 11 Issue 4 Pages 157-166
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSA microcomputer-controlled system of a batch microcalorimeter equipped with a titration apparatus was described. Using this system, enthalpy titration profiles of bovine brain calmodulin by Ca2+ were observed both in the absence and in the presence of Mg2+, and at 5, 15 and 25°C. Titrations of calmodulin with Ca2+ in the absence of Mg2+ showed that the Ca2+-binding reaction is endothermic and thus is driven solely by the entropy change. Following the method of Sturtevant [Proc. Natl. Acad. Sci. U. S. 74, 2236 (1977)], the magnitudes of the hydrophobic and intramolecular vibrational contributions to the entropy change of calmodulin on Ca2+-binding were estimated. Ca2+-binding to calmodulin gives rise to an increase in hydrophobic entropy and thus to an “assembling” of nonpolar groups. Ca2+-binding also gives rise to an increase in vibrational entropy, indicating a “softening” of the overall structure of calmodulin molecule.View full abstractDownload PDF (1729K) -
Haruo Nakayama1984 Volume 11 Issue 4 Pages 167-175
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThermodynamics and thermal properties of clathrate hydrates, including semiclathrate hydrates of tetraalkylammonium salts as well as ordinary gas hydrates, have been reviewed.
For gas hydrates, the following topics have been discussed: (i) determination of a hydration number from the temperature dependence of the dissociation pressure; (ii) heat of encagement of guest molecules; and (iii) heat of formation of a vacant water cage from ice I.
For semiclathrate hydrates ((n-C4H9)4NF (or Cl)·30H2O and (i-C5H11)4NF (or Cl)·39H2O), such topics as (i) direct calorimetric determination of the heat of solution in water and of the heat of fusion of the hydrate solid and (ii) the calculation of their heats of solution in saturated aqueous solutions from temperature dependence of their solubilities in water, have also been discussed.View full abstractDownload PDF (1133K) -
High temperature calorimetry and enthalpy measurementH. Inaba, M. Kamimoto, Y. Takahashi, I. Hatta1984 Volume 11 Issue 4 Pages 176-186
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (1677K) -
S. Morisaki1984 Volume 11 Issue 4 Pages 187-188
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (315K) -
T. Tanii, H. Ohnuma1984 Volume 11 Issue 4 Pages 189-190
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (218K) -
1984 Volume 11 Issue 4 Pages 191-208
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (3054K) -
Editorial Board1984 Volume 11 Issue 4 Pages 209-210
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (233K) -
H. Suga1984 Volume 11 Issue 4 Pages 211-217
Published: October 10, 1984
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (1007K)
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