Comparison between 10 000 year old and contemporary spruce lignin
2009 (English)In: Wood Science and Technology, ISSN 0043-7719, E-ISSN 1432-5225, Vol. 43, no 1-2, 23-41 p.Article in journal (Refereed) Published
Wood from white spruce Picea glauca that had been preserved by rapid burial in lake sediments 10,000 years ago, was investigated and compared to a contemporary reference white spruce wood. The 10,000-year old sample appeared to have an intact primary cell wall and middle lamella, whereas the carbohydrate monomer distribution, and microscopic images showed that the secondary wall was at least partially removed, indicating that this structure had been selectively attacked by bacteria. The Klason lignin amount in the aged spruce was found to be 60%. The relative lignin monomer content in the aged spruce was 9% lower than that of the reference wood, showing that there were fewer beta-O-4' linkages in the aged sample. This finding was supported by SEC analysis of the thioacidolysed samples as a larger proportion of lignin oligomers were observed in the aged spruce than in the reference material. This indicates a somewhat greater number of condensed bonds in the aged spruce than in the reference spruce sample. Quantitative C-13 NMR analysis and HSQC techniques applied on milled wood lignins (MWL) revealed no significant structural differences between the aged spruce and the reference.
Place, publisher, year, edition, pages
2009. Vol. 43, no 1-2, 23-41 p.
Carbohydrates, Gel permeation chromatography, Monomers, Oligomers, Polymers, Walls (structural partitions), Wood
Paper, Pulp and Fiber Technology
IdentifiersURN: urn:nbn:se:kth:diva-5948DOI: 10.1007/s00226-008-0222-5ISI: 000263392100003ScopusID: 2-s2.0-60649094082OAI: oai:DiVA.org:kth-5948DiVA: diva2:10494
QC 20100903. Uppdaterat från Manuskript till Artikel (20100903) 2006-06-022006-06-022010-09-20Bibliographically approved