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  • 1980-1984  (3)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    International journal of cosmetic science 5 (1983), S. 0 
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: This paper reviews current ideas concerning the reactions involved in sunburn, suntanning, premature ageing and carcinogenesis due to acute or chronic exposure to sunlight. The physiological mechanisms of protection involving melanin pigmentation, thickening of the epidermal horny layer and urocanic acid are briefly discussed. The importance of wavelengths from 290-315 nm (UV-B) for these reactions is emphasized as is the need to investigate further the involvement of longer wavelength (UV-A, 315-400 nm). L'influence des radiations sur la peau et les principes de la protection solaire Cet article passe en revue les données actuelles concernant les réactions impliquées dans les processus de brûlure, bronzage, vieillissement prématuré et carcinogenese dus aux expositions aigues ou chroniques de la peau à la lumière solaire. Les mécanismes physiologiques de protection qui mettent en oeuvre la pigmentation par la mélanine, l'épais-sissement de la couche cornée, et l'acide urocanique sont brièvement discutés. On insiste sur l'importance des UV-B (longueurs d'onde de 290 à 315 nm) dans ces réactions, de même que sur la nécessité d'entreprendre des études plus approfondies sur le rôle des UV-A (315-400 nm).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Environmental science & technology 17 (1983), S. 272-277 
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Pregnant goats were fed grass-legume silage grown on soil amended with 112 dry metric tons per hectare of municipal sewage sludge from Syracuse, New York for 135 days. Whereas PCBs were not detectable in control or sludge-grown silage, cadmium was much higher (3.81 ppm) in the sludge-grown silage as compared to the control silage (0.14 ppm). There were no consistent differences in residues of cadmium in the goat's milk or body tissues of the kids when compared to controls. The concentration of cadmium in the livers of the adult animals was significantly higher (p 〈 0.05) in the sludge treatment than controls. No significant treatment effects were observed in mutagenic responses for the goats milk. Interestingly, the pregnant goats fed the sludge-grown silage produced far too little milk for their kids while the control animals produced sufficient milk. There were no observable changes in the tissue ultrastructure as examined by electron microscopy for both the adults and the kids from either ration treatment.
    Type of Medium: Electronic Resource
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