Journal of Materials Life Society
Online ISSN : 2185-7016
Print ISSN : 1346-0633
ISSN-L : 1346-0633
Volume 27 , Issue 1
Showing 1-5 articles out of 5 articles from the selected issue
Short Reviews
Original Paper
  • Hiroaki MATSUYOSHI, Shinichi KAWASAKI, Kazushi YAMADA, Hiroyuki NISHIM ...
    2015 Volume 27 Issue 1 Pages 17-22
    Published: February 28, 2015
    Released: June 04, 2019

    The effects of curing temperature on the properties of organic-inorganic hybrid coating were investigated. The coating was obtained by the hydrolysis of methyltrimethoxysilane and the subsequent condensation.

    The curing temperature had little effect on pencil hardness, contact angle against water, and tape peeling load value of the coating.

    The higher curing temperature improved the abrasion resistance against the wool felts.

    ATR-FTIR spectroscopy indicated that the higher curing temperature decreased the contents of Si-OH and increased the content of Si-CH3 on the surface of the coating.

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Comprehensive Paper
  • Tsuneo ISHIDA
    2015 Volume 27 Issue 1 Pages 23-31
    Published: February 28, 2015
    Released: June 04, 2019

    Antibacterial activities of Cu ion and Cu complex for the Gram-positive and Gram-negative bacterial cell walls, membrane and cytoplasm were examined on the basis of being more pronounced with the bacteriostatic action. The antibacterial actions resulted in the various damages of biosynthesis by Cu-TP/TG enzymes bonds, Cu complex formations and reactive oxygen species(ROS) in the peptidoglycan layer of Gram-positive cell wall, the damages of the outer membrane due to protein deficiency, the inhibitions by Cu+, ・OH, OH occurring with Haber-Weiss and Fenton reactions in the cell membrane, and the cleavages of DNA and RNA by DNA-chain breaking and Cu-complex formations in DNA bases due to Cu2+ and H2O2 in the cytoplasm.

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