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Items for "oxalic acid"

Vapor-phase diethyl oxalate pretreatment of wood chips: Part 2. Release of hemicellulosic carbohydrates

Wood chips of pine, spruce, aspen, and maple were treated at 135–140°C with diethyl oxalate (DEO) and analyzed for extractable and residual carbohydrates...

Keywords: biorefining, ester, hardwood, hemicelluloses, oxalic acid, Oxalate, softwood

05/2007 | Holzforschung, Walter de Gruyter

High-performance liquid chromatographic analysis of soluble and total oxalate in Ca- and Mg-amended liquid cultures of three wood decay fungi

Two brown-rot wood decay fungi, Fomitopsis pinicola and Meruliporia incrassata, and the white-rot species Phanerochaete chrysosporium were grown for 4 weeks in liquid culture at 0.35, 0.70, 1.05, and 5.00 mM calcium (Ca) and 1.35 and 2.70 mM magnesium (Mg) concentrations...

Keywords: Biodegradation, brown-rot, calcium, HPLC, oxalic acid, white-rot

10/2004 | Holzforschung, Walter de Gruyter

The effect of CaCl₂ on growth rate, wood decay and oxalic acid accumulation in Serpula lacrymans and related brown-rot fungi

The dry rot fungus, Serpula lacrymans, is one of the most destructive copper-tolerant fungi causing timber decay in buildings in temperate regions...

Keywords: brown-rot fungi, calcium, CaCl2, copper citrate (CC), copper-based preservative, HPLC, oxalic acid, Serpula lacrymans, soil bottle test, wood decay

05/2006 | Holzforschung, Walter de Gruyter

Oxalate regulation by two brown rot fungi decaying oxalate-amended and non-amended wood

Oxalic acid secretion by brown rot wood-degrading fungi has been proposed to function in pH control and non-enzymatic biodegradation...

Keywords: Biodegradation, cations, decarboxylation, dry rot, Iron, oxalic acid

11/2005 | 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...