Polysaccharide degradation in waterlogged oak wood from the ancient warship Vasa
- 5 December 2007
- journal article
- Published by Walter de Gruyter GmbH in Holzforschung
- Vol. 62 (1), 57-63
- https://doi.org/10.1515/hf.2008.008
Abstract
A rather extensive degradation of cellulose and hemicelluloses was found in waterlogged oak wood samples from the ancient warship Vasa by size exclusion chromatography with the solvent system lithium chloride/N,N-dimethylacetamide (LiCl/DMAc). The degradation has mainly occurred after salvage of the wreck, probably as a consequence of keeping iron contaminated wood in contact with air. The most likely explanation is Fenton type of reactions degrading the wood polymers and oxidising reduced sulphur forms to sulphuric acid. An increased degradation rate of the Vasa wood can be anticipated in the future if the sulphuric acid cannot be neutralised and the oxidative reactions cannot be quenched.Keywords
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