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- W2174348085 abstract "Abstract We investigated the molecular inventory of River Danube sediments and identified wax esters with 28–36 carbons, with C 30 , C 31 and C 32 homologs the most abundant. They consist of various combinations of n -, iso - and anteiso -aliphatic acid and alcohol moieties, with different isomer distributions for the esters with odd and even carbon numbers. The short chain length (C 28 –C 36 ), high proportion of methyl moieties and presence of monounsaturated esters together suggest a bacterial origin for the wax esters. The concentration in surface sediments varied from 0 to 741 μg/kg, being significantly enriched at locations with high nutrient concentration and high primary productivity. Cluster analysis of denaturing gradient gel electrophoresis (DGGE) band patterns revealed different bacterial communities in surface sediments from the stream and surface sediments from the reservoir. The concentration in a 70 cm core of rapidly deposited sediments decreased significantly with depth, following first order kinetics, suggesting a loss of the esters within ca. 3 years following burial and hence a low probability for preservation in the geological record. Wax esters in rivers have rarely been investigated; our results suggest that they represent a bacterial response to enhanced primary production, triggered by higher nutrient supply." @default.
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- W2174348085 date "2015-12-01" @default.
- W2174348085 modified "2023-09-27" @default.
- W2174348085 title "Bacterial wax esters in recent fluvial sediments" @default.
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- W2174348085 doi "https://doi.org/10.1016/j.orggeochem.2015.10.003" @default.
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