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  • 1
    Electronic Resource
    Electronic Resource
    The toxicological properties of impurities in malathion (1978)
    Springer
    Archives of toxicology 42 (1978), S. 95-106 
    Details
    ISSN: 1432-0738
    Keywords: Malathion ; Isomalathion ; Trimethyl phosphorothioates ; Acetylcholinesterase ; Carboxylesterase ; Potentiation of toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract During a malaria eradication programme in Pakistan in 1976, out of 7,500 spraymen, 2,800 became poisoned and 5 died. The major determinant of this poisoning has been identified as isomalathion present as an impurity in the malathion. It seems almost certain that the isomalathion was produced during storage of the formulated malathion. The quantitative correlation found between isomalathion content and toxicity of many field samples of malathion has been confirmed by an examination of mixtures of pure compounds. Addition of known amounts of isomalathion to technical malathion indicates that other active substances are present. These impurities have been identified (trimethyl phosphorothioates) and have been shown to behave like isomalathion in potentiating the toxicity of malathion. Some preliminary work on their toxicological properties is reported. The mechanisms involved in the potentiation of the toxicity of malathion are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00316489
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A technique for modelling the performance of birefringent wave plates (1999)
    Springer
    Optical and quantum electronics 31 (1999), S. 645-653 
    Details
    ISSN: 1572-817X
    Keywords: Achromatic ; birefringent ; wave plate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract By considering the phase delay introduced by a birefringent wave plate to each frequency component of a finite bandwidth light source we establish the polarisation state of the transmitted light. Realisable designs of achromatic, zero-order and high-order quarter wave and half wave plates are analysed for use with a variety of light sources with different bandwidths.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006979920296
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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