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Sökning: WFRF:(Polymenakou Paraskevi N)

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1.
  • Davies, Neil, et al. (författare)
  • The founding charter of the Genomic Observatories Network
  • 2014
  • Ingår i: GigaScience. - 2047-217X. ; 3:2
  • Tidskriftsartikel (refereegranskat)abstract
    • Abstract The co-authors of this paper hereby state their intention to work together to launch the Genomic Observatories Network (GOs Network) for which this document will serve as its Founding Charter. We define a Genomic Observatory as an ecosystem and/or site subject to long-term scientific research, including (but not limited to) the sustained study of genomic biodiversity from single-celled microbes to multicellular organisms.An international group of 64 scientists first published the call for a global network of Genomic Observatories in January 2012. The vision for such a network was expanded in a subsequent paper and developed over a series of meetings in Bremen (Germany), Shenzhen (China), Moorea (French Polynesia), Oxford (UK), Pacific Grove (California, USA), Washington (DC, USA), and London (UK). While this community-building process continues, here we express our mutual intent to establish the GOs Network formally, and to describe our shared vision for its future. The views expressed here are ours alone as individual scientists, and do not necessarily represent those of the institutions with which we are affiliated.
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3.
  • Wiegert, Charline, 1980-, et al. (författare)
  • Carbon and Chlorine Isotope Fractionation During Microbial Degradation of Tetra- and Trichloroethene
  • 2013
  • Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 47:12, s. 6449-6456
  • Tidskriftsartikel (refereegranskat)abstract
    • Two-dimensional compound-specific isotope analysis (2D-CSIA), combining stable carbon and chlorine isotopes, holds potential for monitoring of natural attenuation of chlorinated ethenes (CEs), in contaminated soil and groundwater. However, interpretation of 2D-CSIA data sets is challenged by a shortage of experimental Cl isotope enrichment factors. Here, isotope enrichments factors for C and Cl (i.e., epsilon(C) and epsilon(Cl)) were determined for biodegradation of tetrachloroethene (PCE) and trichloroethene (TCE) using microbial enrichment cultures from a heavily CE-contaminated aquifer. The obtained values were epsilon(C) = -5.6 +/- 0.7 parts per thousand (95% CI) and epsilon(Cl) = -2.0 +/- 0.5 parts per thousand for PCE degradation and epsilon(C) = -8.8 +/- 0.2 parts per thousand and epsilon(Cl) = -3.5 +/- 0.5 parts per thousand for TCE degradation. Combining the values for both epsilon(C) and epsilon(Cl) yielded mechanism-diagnostic epsilon(Cl)/epsilon(C) ratios of 0.35 +/- 0.11 and 0.37 +/- 0.11 degradation of PCE and TCE, respectively. Application of the obtained epsilon(C) and epsilon(Cl) values to a previously investigated field site gave similar estimates for the fraction of degraded contaminant as in the previous study, but with a reduced uncertainty in assessment of the natural attenuation. Furthermore, 16S rRNA gene clone library analyses were performed on three samples from the PCE degradation experiments. A species closely related to Desulfitobacterium aromaticivorans UKTL dominated the reductive dechlorination process. This study contributes to the development of 2D-CSIA as a tool for evaluating remediation strategies of CEs at contaminated sites.
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