Caractérisation de biofilms bactériens et potentiel de méthylation du mercure

Abstract : Mercury is a metallic element naturally present in the environment. But since the industrial era, the flows of mercury in the environment deeply increased. This has impacts on environment and public health because mercury in the form of methylmercury is a powerful neurotoxic bioaccumalable in organisms and throughout the food chain. Mercury methylation is a biotic process. The role of some anaerobic microorganisms has been highlighted in the mercury methylation in aquatic systems. These microorganisms would grow mainly in the form of biofilms. But most of the methylation studies were focused on the potential of methylation of pure cultures. Biofilm cells are physiologically different from planctonic cells, moreover they're encased into an exocellular polymeric matrix. Those aspects are likely to influence the potential mercury methylation of cells. The aim of this study is to estimate the potential of mercury methylation by biofilms. In opposition to others studies, the results show that the methylant potential of biofilms studied are higher than the planctonic cells.
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Master thesis
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http://docnum.univ-lorraine.fr/prive/BUS_M_2013_DZANGUI_DARELLE.pdf
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https://hal.univ-lorraine.fr/hal-01777746
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Submitted on : Wednesday, April 25, 2018 - 9:47:46 AM
Last modification on : Wednesday, April 25, 2018 - 9:47:47 AM

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Darelle Dzangui. Caractérisation de biofilms bactériens et potentiel de méthylation du mercure. Microbiologie et Parasitologie. 2013. ⟨hal-01777746⟩

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