Oleoscience
Online ISSN : 2187-3461
Print ISSN : 1345-8949
ISSN-L : 1345-8949
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Volume 7, Issue 9
Displaying 1-3 of 3 articles from this issue
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  • The Damage on the Skin Induced by UV Exposure in Sunlight
    Masako NAGANUMA
    2007 Volume 7 Issue 9 Pages 347-355
    Published: September 01, 2007
    Released on J-STAGE: June 01, 2013
    DOIhttps://doi.org/10.5650/oleoscience.7.347
    JOURNAL FREE ACCESS
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    An acute damage of ultraviolet rays on skin, which was called sunburn, had already known in the ancient times. In recnt years it was reported that the phenomenon was resulted from direct DNA damage by UVB and that its action apectrum was in UVB. Furthermore the immunosuppression was shown to be elicited by UV. In addition to acute responses, chronic response by UV were called photoaging. Photoaging incloudes skin cancer, malignant melanoma, wrinkles, pigmented apots and sagging. They are induced by accumulation of DNA damages and generation of lipid peroxides and radicals by repeated UV exposure. However we don't know in detail which wavelength elicit these changes. In order to prevent our skin from photodamage, we have to take care of our life style, to wear hats and wears, and to apply sunscreen on our skin.
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  • The Latest Approved UV Filter for Personal Care
    Kazuo FUJIOKA
    2007 Volume 7 Issue 9 Pages 357-362
    Published: September 01, 2007
    Released on J-STAGE: June 01, 2013
    DOIhttps://doi.org/10.5650/oleoscience.7.357
    JOURNAL FREE ACCESS
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    A lot of organic UV filters have been developed to increase its safety and functions. organic UV filters have to be approved by the Minister of HMLW to use cosmetic. Recently, only very safe organic UV filters are used for sun care formula by improved photo chemistry and cosmetic manufacturer's requirements. The latest organic UV filter, “Dimethico Diethylbenzalmalonate” approved in 2005, has Polysiloxane backbone. Safety and photo-stability of this new organic UV filter is excellent. Compatibility of this material with solvent of cosmetics is also satisfactory therefore it is a promising organic UV filter as next generation.
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  • Theory of UV Absorbers and Molecular Design for Novel UV Protective Agents
    Seiji TOBITA, Atsushi KOBAYASHI, Toshitada YOSHIHARA, Hirofumi SHIMADA
    2007 Volume 7 Issue 9 Pages 363-370
    Published: September 01, 2007
    Released on J-STAGE: June 01, 2013
    DOIhttps://doi.org/10.5650/oleoscience.7.363
    JOURNAL FREE ACCESS
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    Radiationless transitions play a key role in the action of UV absorbers which attenuate the transmission of the solar UV rays to the skin by absorbing the radiation (sunscreen) and prevent polymers from photodegradation caused by UV light (polymer photostabilizer). In this article, mechanistic aspects of UV absorbers, especially the mechanism of the energy dissipating processes in the excited states, have been reviewed, and a guideline for the design of new UV protective agents is presented.
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