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Volume 27 (2000)
- Issue 5 Pages 226-
- Issue 4 Pages 170-
- Issue 3 Pages 112-
- Issue 2 Pages 67-
- Issue 1 Pages 3-
Volume 27, Issue 3
Displaying 1-6 of 6 articles from this issue
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Noriko Mori, Hideo Shimizu, Shigeo Yasui, Katsutada Takahashi, Oana-Ar ...2000 Volume 27 Issue 3 Pages 112-117
Published: June 15, 2000
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSA calorimetric method was applied to the quantitative determination of the antimicrobial activity of Pionin-an additive used in the cosmetics industry-aspect previously investigated by other authors using more traditional methods. Because it is insoluble in the growth media, the additive required initial dissolution in 1, 3-butanediol or 1, 2-pentanediol-two ingredients widely used in cosmetics, which have been the subject of a previous research presented in this journal. Based on the changes observed in the heat evolution curves corresponding to microbial cultures to which Pionin was added in various amounts, quantitative parameters could be determined to characterize its antimicrobial action. Pionin exerted remarkable antimicrobial activity against Staphylococcus aureus and MRSA, was less inhibitory against Escherichia coli, Candida albicans and Aspergillus niger, and had reduced antimicrobial activity against Pseudomonas aeruginosa. With the exception of Candida albicans, Pionin was more efficient in inhibiting microbial growth when dissolved in 1, 2-pentanediol than when dissolved in 1, 3-butanediol.View full abstractDownload PDF (1300K) -
Yoshiyuki Mizutani, Hatsue Tamura, Takasuke Matsuo, Hiroshi Suga, Gen- ...2000 Volume 27 Issue 3 Pages 118-127
Published: June 15, 2000
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThe thiourea hexachloroethane adduct has been studied by single crystal X-ray diffraction and low temperature calorimetry. The guest molecules are disordered in three orientations in the adduct channel. The thermal properties are described consistently by a model involving the orientational disorder of the guest molecules and their ordering in a phase transition at 96K. A small degree of disorder persists to lower temperatures and becomes frozen into an immobile state below a glass transition at 59K.View full abstractDownload PDF (1504K) -
Nobuyoshi Koga, Haruhiko Tanaka, Jose M. Criado2000 Volume 27 Issue 3 Pages 128-140
Published: June 15, 2000
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSApplication of Controlled transformation Rate Thermal Analysis (CRTA) to the kinetic analyses for the solid-state reactions is reviewed. The principle and techniques of CRTA are compared with conventional isothermal and nonisothermal measurements. On the basis of the characteristics of kinetic data recorded by CRTA, the practical methods of kinetic analyses for the CRTA data are introduced. As exemplified by several successful kinetic approaches to the thermal decomposition of solids, the usefulness of CRTA for kinetic study is discussed. It is concluded that application of CRTA to the kinetic analysis of the solid-state reactions is very promising, especially for the reactions influenced largely by the self-generated and applied atmospheric conditions.View full abstractDownload PDF (2258K) -
Toshimasa Hashimoto, Junko Morikawa2000 Volume 27 Issue 3 Pages 141-151
Published: June 15, 2000
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThe temperature wave analysis developed by the authors is reviewed in the history of the methodological and technical development of temperature modulated thermal analysis. With this technique the decay of temperature wave which propagates in the thickness direction of film specimen is precisely detected. In particular, the phase shift is stably detected with a high precision inspite of the surrounding conditions, and then it enables a conversion into thermal diffusivity in the heating/cooling run. By inputting a square pulse train with a variable duty factor the high-order harmonics of temperature wave are detected. This principle is applied to a technique called “Fourier transform thermal analysis”, which makes it possible to determine simultaneously thermal diffusivity and heat capacity per unit volume as a function of frequency and temperature. It is expected that it might become a powerful tool to analyze a time dependent phenomenon such as glass transition.View full abstractDownload PDF (1670K) -
Shiro Shimada2000 Volume 27 Issue 3 Pages 152-161
Published: June 15, 2000
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSA new technique for simultaneous acoustic emission (AE) and differential thermal analysis (DTA) measurement is described. The technique has been successfully utilized to monitor some mechanical events occurring during dehydration, decomposition, and phase transition of NaN3, alkali perchlorate (MeClO4 where Me=Na, K, Cs), CsCl, NH4Cl, NH4Br, and KNO3 for which the new results are reported. It is noticed that the events which cannot be detected by DTA are monitored by AE.View full abstractDownload PDF (1501K) -
2000 Volume 27 Issue 3 Pages 162-163
Published: June 15, 2000
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (280K)
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