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141
pages
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English
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Documents
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2010
Description
Black Slate - Surface Alteration Due to Fungal Activity Dissertation zur Erlangung des akademischen Grades doctor rerum naturalium (Dr. rer. nat.) vorgelegt dem Rat der Chemisch-Geowissenschaftlichen Fakultät der Friedrich-Schiller-Universität Jena von Dipl.-Biol. Daniela Siegel geboren am 22. Januar 1980 in Altenburg Gutachter 1. Prof. R. Gaupp, Jena 2. Prof. E. Kothe, Jena Tag der öffentlichen Verteidigung: 16.Juli 2010 Page I Abstract Black slates of different oxidation states and graphite samples as pure carbon source were incubated with the white‐rot fungus Schizophyllum commune 4‐39 for 3 months. Investigations by SEM showed fungal affinity to rough surfaces. Oxidatively weathered, bleached black slate samples have more micropores and increased surface roughness than unweathered samples. Unpolished and polished bleached black slate samples were colonized best by fungal hyphae. The hyphae often entered pores. Etch pits induced by fungal activity could be observed which were then quantified by vertical scanning interferometry (VSI). The etch pits measured 3 – 4 µm in width and 180 – 200 nm in depth. In contrast to black slate samples, more etch pits were found on graphite surfaces.
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Publié par
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Publié le
01 janvier 2010
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Langue
English
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Poids de l'ouvrage
18 Mo