Journal of the Japan Society of Colour Material
Online ISSN : 1883-2199
Print ISSN : 0010-180X
ISSN-L : 0010-180X
Volume 85, Issue 10
Displaying 1-5 of 5 articles from this issue
Original Research Paper
  • Masafumi YAMATO, Masashi KANAMARU, Yasushi FUCHITA, Atsushi TAKAHASHI, ...
    2012 Volume 85 Issue 10 Pages 403-407
    Published: October 20, 2012
    Released on J-STAGE: January 20, 2013
    JOURNAL FREE ACCESS
    We controlled the orientation distribution of the pearl pigment by using a magnetic field modulator, resulting in a visual effect that the pattern was shown three-dimensional. We quantitatively showed that the orientation distribution of pearl pigment was equal to the direction distribution of magnetic line of force formed by the field modulator. Although the largest tilt angle of pearl pigment in the coating film was 15° , a large three-dimensional visual effect was expressed, which could be explained by the combined effect with flip-flop effect of pearl pigment.
    Photographs of the field modulator (a) and the coating film prepared over the modulator placed in the magnetic field of 1 T (b).
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Review
  • Kazuaki HASHIMOTO, Naoyuki MATSUMOTO, Hirobumi SHIBATA
    2012 Volume 85 Issue 10 Pages 408-415
    Published: October 20, 2012
    Released on J-STAGE: January 20, 2013
    JOURNAL FREE ACCESS
    With the objective of developing new inorganic antimicrobial agents that can be used both inside and outside of living bodies, beta-Ca3(PO4)2 (β-TCP), known for its use as a ceramic for biomaterials, was simultaneously substituted by anti-bacterially active silver ion and divalent copper or zinc ions to successfully prepare antibacterial beta-TCP compounds (Ag-β-TCP, AgCu-β-TCP and AgZn-β-TCP). It was shown that Ag-β-TCP, AgZn-β-TCP and AgCu-β-TCP prepared in this way are outstanding antimicrobial agents with high antibacterial properties. Moreover, by controlling the antibacterial properties by varying the amount of each metal compound, the development of antimicrobial agents with optimized activity versus specific levels of microbe or viral infection can be anticipated, along with potential uses in a wide range of applications separate from living bodies, such as foodstuffs and industrial fields.
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Digest
  • Pengyu WANG, Kazuya KOBIRO
    2012 Volume 85 Issue 10 Pages 416-420
    Published: October 20, 2012
    Released on J-STAGE: January 20, 2013
    JOURNAL FREE ACCESS
    Much attention has been paid to titanium dioxide, since it is a promising material in the fields of energy, environmental compliance, medicine, and so on. We developed a simplest possible one-step and one-pot rapid method for synthesis of spherical mesoporous titanium dioxide nanoparticles by treatment of titanium salt and carboxylic acid in supercritical methanol. Hollow mesoporous nanoparticles were easily obtained by changing the carboxylic acid. In situ doping of rare earth metals was confirmed in the presence of the corresponding metal salt during the one-pot reaction. The nanoparticles were successfully applied as a new material for biolistic bombardment.
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Serial Lecture
  • Tetsuya KANEMARU
    2012 Volume 85 Issue 10 Pages 421-426
    Published: October 20, 2012
    Released on J-STAGE: January 20, 2013
    JOURNAL FREE ACCESS
    Pigments used for cosmetics are classified generally into organic colorants, inorganic colorants and nature colorants. About the organic colorants, many studies were accomplished in a point of view of safety and the stability, and the lists of the usable colorants are promulgated in Japan, the United States and Europe.
    On the other hand, about the inorganic colorants (e.g., a titanium oxide or an iron oxide for colorants), it is thought that there is a difference in the regulation situation between in Japan and in the United States and Europe. Specifically, since the regulation like the organic colorants has already been established in the United States and Europe, the understanding and correspondence are indispensable in developing cosmetics business worldwide.
    In this report, the regulation of representative inorganic colorants for cosmetics in Japan, the United States and Europe is compared, and the tendency is introduced.
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