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Items for "wood degradation"

Extraction of iron compounds from wood from the Vasa

In 2000, salt precipitates were found on surfaces of the Swedish warship Vasa, accompanied by low pH values, partly as a result of oxidation of accumulated sulfur compounds...

Keywords: acid neutralisation, Complexation, conservation, DTPA, EDDHMA, iron(III) complex, Iron extraction, waterlogged wood, wood degradation

11/2006 | Holzforschung, Walter de Gruyter

Effect of treatments with 1,3-dimethylol-4,5-dihydroxy-ethyleneurea (DMDHEU) on the tensile properties of wood

The thin-veneer strip technique was applied to investigate the modifying effects of 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) on the tensile strength of wood...

Keywords: chemical modification, DMDHEU, scanning electron microscopy, tensile strength, wood degradation

01/2007 | Holzforschung, Walter de Gruyter

Fenton-induced degradation of polyethylene glycol and oak holocellulose. A model experiment in comparison to changes observed in conserved waterlogged wood

Degradation of polysaccharides and polyethylene glycol have recently been observed in the wood of the Swedish war-ship Vasa...

Keywords: Acetic Acid, cellulose, formic acid, glycolic acid, hemicelluloses, Iron, oxalic acid, polyethylene glycol, sulfur, Vasa, wood degradation, xylan

11/2008 | Holzforschung, Walter de Gruyter

Analysis of acids and degradation products related to iron and sulfur in the Swedish warship Vasa

Aqueous wood extracts from the historic Swedish warship Vasa have been analyzed by ¹H-NMR spectroscopy, ion chromatography, and matrix assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry as part of studies on the chemical degradation related to increased levels of iron and sulfur...

Keywords: Acetic Acid, cellulose, formic acid, glycolic acid, hemicelluloses, Iron, oxalic acid, polyethylene glycol, sulfur, Vasa, wood degradation, xylan

11/2008 | Holzforschung, Walter de Gruyter

Degradation of polyethylene glycol and hemicellulose in the Vasa

Mass spectrometric analysis of aqueous wood extracts from the Swedish warship Vasa reveals a serious chemical condition in the depth of the wood...

Keywords: catalytic oxidation, hemicelluloses, Hydrolysis, matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF), polyethylene glycol, Vasa, wood degradation

01/2008 | Holzforschung, Walter de Gruyter