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  • 1
    Electronic Resource
    Electronic Resource
    Light-dependent toxicity of α-terthienyl and anthracene toward late embryonic stages ofRana pipiens (1984)
    Springer
    Journal of chemical ecology 10 (1984), S. 1115-1122 
    Details
    ISSN: 1573-1561
    Keywords: Rana pipiens ; ultraviolet light ; sunlight ; photosensitization ; α-terthienyl ; anthracene ; water
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Alpha-terthienyl is toxic to late embryonic stages ofRana pipiens in the presence of sunlight. Neither α-terthienyl alone in the dark nor a previously photolyzed solution of α-terthienyl has comparable activity. The LC50 was 0.11 ppm with 30 min of exposure and 0.018 ppm with 2 hr of exposure to sunlight. Anthracene, a representative example of polycyclic aromatic hydrocarbons widely distributed in the environment, also showed similar phototoxicity, with an LC50 of 0.065 ppm after 30 min of exposure and 0.025 ppm after 5 hr.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987517
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Delayed phototoxic effects of 8-methoxypsoralen, khellin, and sphondin inAedes aegypti (1986)
    Springer
    Journal of chemical ecology 12 (1986), S. 899-914 
    Details
    ISSN: 1573-1561
    Keywords: Phototoxicity ; 8-methoxypsoralen ; sphondin ; khellin ; Aedes aegypti ; Diptera ; Culicidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract At concentrations up to 6.7 ppm, 8-methoxypsoralen, sphondin, and khellin are not toxic to first-instar larvae of the mosquitoAedes aegypti. The irradiation of sensitized larvae with long-wavelength ultraviolet light did not always produce any immediate toxicity enhancement, but delayed effects were clearly visible. These were observed over the development of the organisms from first-instar larvae to adults. No adverse effects were noted when larvae were irradiated in the absence of sensitizers, or when they were placed in solutions of sensitizers which had been previously irradiated with the same light sources. 8-Methoxypsoralen was slightly more phototoxic than its isomer sphondin. Khellin, recently reported to undergo photoinduced cyclization with DNA components, showed minimal phototoxicity in the concentration range used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01020260
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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