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    Interaction of mercury and selenium in the larval stage zebrafish vertebrate model

    Access Status
    Fulltext not available
    Authors
    MacDonald, T.
    Korbas, M.
    James, A.
    Sylvain, N.
    Hackett, Mark
    Nehzati, S.
    Krone, P.
    George, G.
    Pickering, I.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    MacDonald, T. and Korbas, M. and James, A. and Sylvain, N. and Hackett, M. and Nehzati, S. and Krone, P. et al. 2015. Interaction of mercury and selenium in the larval stage zebrafish vertebrate model. Metallomics. 7 (8): pp. 1247-1255.
    Source Title
    Metallomics
    DOI
    10.1039/c5mt00145e
    ISSN
    1756-5901
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/8705
    Collection
    • Curtin Research Publications
    Abstract

    © The Royal Society of Chemistry 2015.The compounds of mercury can be more toxic than those of any other non-radioactive heavy element. Despite this, environmental mercury pollution and human exposure to mercury are widespread, and are increasing. While the unusual ability of selenium to cancel the toxicity of mercury compounds has been known for nearly five decades, only recently have some aspects of the molecular mechanisms begun to be understood. We report herein a study of the interaction of mercury and selenium in the larval stage zebrafish, a model vertebrate system, using X-ray fluorescence imaging. Exposure of larval zebrafish to inorganic mercury shows nano-scale structures containing co-localized mercury and selenium. No such co-localization is seen with methylmercury exposure under similar conditions. Micro X-ray absorption spectra support the hypothesis that the co-localized deposits are most likely comprised of highly insoluble mixed chalcogenide HgS<inf>x</inf>Se<inf>(1-x)</inf> where x is 0.4-0.9, probably with the cubic zincblende structure.

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