Sources of neutral lipids in a temperate intertidal sediment☆
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Characterization of organic matter from the Cretaceous sedimentary and volcano-sedimentary strata from Livingston Island, Antarctic Peninsula: Insights from organic petrology, molecular proxies and carbon and hydrogen isotopes
2022, International Journal of Coal GeologyCitation Excerpt :Straight-chain n-ketones are known to be fairly common in various sedimentary rocks (Brassell et al., 1980; Cranwell, 1977; Cranwell et al., 1987; Lehtonen and Ketola, 1990; Leif and Simoneit, 1995; Tuo and Li, 2005; Volkman et al., 1983). Because of similarities between the distribution of the n-alkanones and n-alkanes, the origin of n-ketones is mostly related to microbially-mediated β-oxidation of n-alkanes, n-alkanols or n-fatty acids (Allen et al., 1971; Cranwell et al., 1987; Volkman et al., 1981), although direct contribution from certain living plants (Hernandez et al., 2001; Nichols and Huang, 2007; Ortiz et al., 2011) is also possible in particular cases. The detected herein minor amounts of two homologous series of n-alkane-2-ones and n-alkane-3-ones with comparable distributions can thus be related to a common source.
The distribution of long-chain n-alkan-2-ones in peat can be used to infer past changes in pH
2020, Chemical GeologyCitation Excerpt :The ionization energy of the mass spectrometer was set at 70 eV, the scan ranged from 50 to 550 amu. Compound identifications were based on relative retention times and mass spectra (e.g., Sharkey et al., 1956; Volkman et al., 1981; Lehtonen and Ketola, 1990). Compounds were quantified by comparison of peak areas with the internal standards of known concentration.
Implications for peat formation in Maritsa-West Basin, SE Bulgaria: Insights from organic petrology, palynology and biomarker assemblage
2020, International Journal of Coal GeologyCitation Excerpt :n-Alkan-3-ones and n-alkan-4-ones are presented in subordinate amounts (Table 3) and differ from the n-alkan-2-ones by the smoother distributions and the higher relative abundance of the mid-chain homologues (Fig. 8). Small amounts of n-ketones are known to occur in soils (Bai et al., 2006; Huang et al., 1996; Jaffé et al., 1996), sediments (Albaigés et al., 1984; Brassell et al., 1980; Cranwell, 1977; Cranwell et al., 1987; De la Rosa et al., 2012; Leif and Simoneit, 1995; Volkman et al., 1981; Xie, 2003), peat and coal (Baker et al., 2018; Del Rio et al., 1992; Lehtonen and Ketola, 1990; López-Días et al., 2013; Ortiz et al., 2016; Ortiz et al., 2010; Stefanova et al., 2016; Tuo and Li, 2005; Zheng et al., 2007). In most cases, the distribution of the n-alkan-2-ones closely resembles that of n-alkanes, thus arguing for a product-precursor relationship.
Aliphatic and aromatic biomarkers of the Devonian source rocks from the Western Parnaíba Basin Brazil: Pimenteiras Formation
2020, Journal of South American Earth SciencesBiochemical composition of the cold-water coral Dendrophyllia cornigera under contrasting productivity regimes: Insights from lipid biomarkers and compound-specific isotopes
2018, Deep-Sea Research Part I: Oceanographic Research Papers
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Part 2 in the series: Microbial lipids of an intertidal sediment.
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Present address: Chemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543. U.S.A.