Article (Scientific journals)
Physicochemical And Biochemical Characterization Of Non-Biodegradable Cellulose In Miocene Gymnosperm Wood From The Entre-Sambre-Et-Meuse, Southern Belgium
Lechien, Valérie; Rodriguez, Christian; Ongena, MARC et al.
2006In Organic Geochemistry, 37 (11), p. 1465-1476
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Keywords :
fossil wood; cellulose; biodegradation
Abstract :
[en] Specimens of Miocene fossil wood from the Entre-Sambre-et-Meuse karsts (southern Belgium) were examined using physicochemical and biochemical techniques in order to understand the reasons for the exceptional preservation of these fossilized remains after 15 million years. Structural and chemical changes were assessed by comparing the structural features of the fossil samples with those of their modern counterpart, Metaseguoia. Solid state C-13 nuclear magnetic resonance (NMR) and microscopic analysis showed good preservation of the cellulose structure in the fossil wood from the Florennes peat deposit. Despite the substantial cellulose fraction available in the fossil tissue, an enzymatic degradation test and a biochemical methane potential assay showed that the fossil cellulose could not be degraded by cellulases and anaerobic microorganisms usually involved in the biodegradation of organic matter. Moreover, the cellulose structure (crystallinity and surface area) seemed to have no effect on cellulose biodegradability in these Miocene fossil wood samples. On the basis of our observations, we suggest that the presence of a modified lignin structure could greatly influence cellulose preservation/biodegradability.
Research center :
Centre Wallon de biologie Industrielle
Disciplines :
Life sciences: Multidisciplinary, general & others
Chemistry
Author, co-author :
Lechien, Valérie
Rodriguez, Christian
Ongena, MARC ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech > Gembloux Agro-Bio Tech
Hiligsmann, Serge ;  Université de Liège - ULiège > Biochimie et microbiologie industrielles
Rulmont, André ;  Université de Liège - ULiège > Département de chimie (sciences)
Thonart, Philippe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Language :
English
Title :
Physicochemical And Biochemical Characterization Of Non-Biodegradable Cellulose In Miocene Gymnosperm Wood From The Entre-Sambre-Et-Meuse, Southern Belgium
Publication date :
2006
Journal title :
Organic Geochemistry
ISSN :
0146-6380
Publisher :
ELSEVIER, Oxford, United Kingdom
Volume :
37
Issue :
11
Pages :
1465-1476
1465-1476
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 December 2009

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