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Theses

Asbestos hazard in Western Alps: the use of soil fungi in bioremediation of asbestos fibres dispersed in the environment; a chemical-molecular integrated analysis.

Abstract : The interaction of soil fungi with rocks and minerals is called geomycology. Serpentine rocks belong to the ophiolites family and can contain chrysotile (serpentine asbestos). Asbestos fibres reactivity is related to their surface chemical composition, i.g. the presence of iron, catalysing free radicals release, which is harmful for cells and tissues. Asbestos represents an environmental issue, related not only to serpentine rocks naturally exposed and weathered, but also (and mainly) to asbestos mines and wastes. Soil fungi are good candidates for the bioremediation of asbestos rich soils.
The main goal of this thesis is the isolation of soil fungi from asbestos rich soils and the selection of the more suitable to interact and modify asbestos fibres in vitro. The metabolic responses of fungi are also investigated.
Verticillium leptobactrum is the most abundant specie in all the serpentinic soils considered. This and interesting result, since this specie has bees previously seldom isolated.
V. leptobactrum and other fungal species are able to extract iron and magnesium from chrysotile and crocidolite fibres, modifying their surface chemical composition and reactivity, and their génotoxicity (in acellular experiments). The fungi express anti-oxydant enzymes.
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https://tel.archives-ouvertes.fr/tel-00011760
Contributor : Stefania Daghino <>
Submitted on : Monday, March 6, 2006 - 10:25:30 AM
Last modification on : Wednesday, March 22, 2006 - 2:12:35 PM
Long-term archiving on: : Monday, September 17, 2012 - 12:25:28 PM

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Stefania Daghino. Asbestos hazard in Western Alps: the use of soil fungi in bioremediation of asbestos fibres dispersed in the environment; a chemical-molecular integrated analysis.. Other [q-bio.OT]. Università degli studi di Torino; Université Joseph-Fourier - Grenoble I, 2005. Italian. ⟨tel-00011760⟩

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