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    An unusual distribution of monomethylalkanes in Botryococcus Braunii-rich samples: Origin and significance.

    Access Status
    Fulltext not available
    Authors
    Audino, Michiele
    Grice, Kliti
    Alexander, Robert
    Boreham, Christopher
    Kagi, Robert
    Date
    2001
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Audino, Michiele and Grice, Kliti and Alexander, Robert and Boreham, Christopher and Kagi, Robert. 2001. An unusual distribution of monomethylalkanes in Botryococcus Braunii-rich samples: Origin and significance. Geochemica Et Cosmochimica Acta. 65 (12): pp. 1995-2006.
    Source Title
    Geochemica Et Cosmochimica Acta
    DOI
    10.1016/S0016-7037(01)00568-3
    ISSN
    00167037
    Faculty
    Department of Applied Chemistry
    School of Science and Computing
    Faculty of Science and Engineering
    Remarks

    The link to the journal’s home page is: "http://www.elsevier.com/wps/find/journaldescription.cws_home/622273/description#description" Copyright © 2001 Elsevier B.V. All rights reserved

    URI
    http://hdl.handle.net/20.500.11937/11194
    Collection
    • Curtin Research Publications
    Abstract

    A unique distribution of four homologous series of monomethylalkanes (MMAs) ranging fromC23 to C31+ in the extractable organic matter and the hydrous pyrolysate of Permian torbanites has been observed for the first time. These components have been identified by gas chromatography-mass spectrometry and cochromatography of authentic standards. Each of the series begins with the 2-methylalkane. Each member of a particular homologous series has a common alkyl group, each series differing to the next by two carbon atoms. The members within each homologous series differ by the number of carbon atoms in the second alkyl group. These pronounced homologous series of MMAs are superimposed over the series of lower abundance, partially resolved, more commonly occurring MMAs. This distinct contrast in the distributions of the novel MMAs series and the more commonly occurring MMAs suggests two distinct sources of MMAs in the torbanites. This visual observation is borne out by compound specific carbon isotopic data.A detailed molecular carbon isotopic study in combination with structural data suggests that the unusual MMA series are either derived directly from Botryococcus braunii race A or are novel biomarkers indicative of intense heterotrophic reworking of the algal biomass.

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