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    X-ray-induced photo-chemistry and X-ray absorption spectroscopy of biological samples

    Access Status
    Fulltext not available
    Authors
    George, G.
    Pickering, I.
    Jake Pushie, M.
    Nienaber, K.
    Hackett, Mark
    Ascone, I.
    Hedman, B.
    Hodgson, K.
    Aitken, J.
    Levina, A.
    Glover, C.
    Lay, P.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    George, G. and Pickering, I. and Jake Pushie, M. and Nienaber, K. and Hackett, M. and Ascone, I. and Hedman, B. et al. 2012. X-ray-induced photo-chemistry and X-ray absorption spectroscopy of biological samples. Journal of Synchrotron Radiation. 19 (6): pp. 875-886.
    Source Title
    Journal of Synchrotron Radiation
    DOI
    10.1107/S090904951203943X
    ISSN
    0909-0495
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/36822
    Collection
    • Curtin Research Publications
    Abstract

    As synchrotron light sources and optics deliver greater photon flux on samples, X-ray-induced photo-chemistry is increasingly encountered in X-ray absorption spectroscopy (XAS) experiments. The resulting problems are particularly pronounced for biological XAS experiments. This is because biological samples are very often quite dilute and therefore require signal averaging to achieve adequate signal-to-noise ratios, with correspondingly greater exposures to the X-ray beam. This paper reviews the origins of photo-reduction and photo-oxidation, the impact that they can have on active site structure, and the methods that can be used to provide relief from X-ray-induced photo-chemical artifacts. © 2012 International Union of Crystallography Printed in Singapore-all rights reserved.

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