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    Detection of pigments of halophilic endoliths from gypsum: Raman portable instrument and European Space Agency's prototype analysis

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    Publication date
    2014
    Author
    Culka, A.
    Osterrothova, K.
    Hutchinson, I.B.
    Ingley, R.
    McHugh, M.
    Oren, A.
    Edwards, Howell G.M.
    Jehlička, J.
    Keyword
    Mars; Raman; Gypsum; Halophiles; Pigments; Prototype
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    A prototype instrument, under development at the University of Leicester, for the future European Space Agency (ESA) ExoMars mission, was used for the analysis of microbial pigments within a stratified gypsum crust from a hypersaline saltern evaporation pond at Eilat (Israel). Additionally, the same samples were analysed using a miniaturized Raman spectrometer, featuring the same 532 nm excitation. The differences in the position of the specific bands, attributed to carotenoid pigments from different coloured layers, were minor when analysed by the ESA prototype instrument; therefore, making it difficult to distinguish among the different pigments. The portable Delta Nu Advantage instrument allowed for the discrimination of microbial carotenoids from the orange/green and purple layers. The purpose of this study was to complement previous laboratory results with new data and experience with portable or handheld Raman systems, even with a dedicated prototype Raman system for the exploration of Mars. The latter is equipped with an excitation wavelength falling within the carotenoid polyene resonance region. The ESA prototype Raman instrument detected the carotenoid pigments (biomarkers) with ease, although further detailed distinctions among them were not achieved.
    URI
    http://hdl.handle.net/10454/10436
    Version
    No full-text available in the repository
    Citation
    Culka A, Osterrothova K, Hutchinson I et al (2014) Detection of pigments of halophilic endoliths from gypsum: Raman portable instrument and European Space Agency's prototype analysis. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 372(2030): 20140203.
    Link to publisher’s version
    https://doi.org/10.1098/rsta.2014.0203
    Type
    Article
    Collections
    Life Sciences Publications

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