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Picea abies
Items for "Picea abies"
Carbohydrate structures in residual lignin-carbohydrate complexes of spruce and pine pulp
Residual lignin carbohydrate complexes (RLCC) were isolated enzymatically from spruce and pine pulp...
Keywords: chemical pulp, fiber, fines, lignin-carbohydrate complex, Norway spruce, oxygen delignification, Picea abies, Pinus sylvestris, polysaccharide, residual lignin, Scots pine, structural analysis
10/2004 | Holzforschung, Walter de GruyterThe stiffness modulus in Norway spruce as a function of year ring
The elastic properties of Norway spruce were studied by means of ultrasound. Samples were from stems that were grown either at a medium- or a high-fertility site in Finland...
Keywords: modulus of elasticity, Picea abies, ultra-sound
07/2005 | Holzforschung, Walter de GruyterCombined shear and compression analysis using a modified Iosipescu shear test device. Experimental studies on dry wood
The mechanical treatment of wood in a refiner involves a complex combination of shear and compression forces...
Keywords: compression, Density, Picea abies, shear stress, wood
09/2005 | Holzforschung, Walter de GruyterDissolution of fibre material in alkaline pre-treatment and refining of spruce CTMP
The chemistry of chemithermomechanical pulping (CTMP) was assessed by chemical pre-treatment of spruce chips, followed by laboratory-scale refining...
Keywords: chemithermomechanical pulping, deacetylation, demethylation, hemicelluloses, pectins, Picea abies, sulfonation
01/2006 | Holzforschung, Walter de GruyterDistribution and characterisation of discolouring substances in Norway spruce (Picea abies L. Karst.) pulp wood stored under water sprinkling
Discolouration of wood raw material during wet storage has a notable negative effect on the quality of the final product...
Keywords: bordered pit, discolouration, Norway spruce, Picea abies, post harvest, pulpwood, stain, storage, torus
01/2006 | Holzforschung, Walter de GruyterPermeability changes in heartwood of Picea abies and Abies alba induced by incubation with Physisporinus vitreus
The present study shows that isolates of
Keywords: Abies alba, heartwood, Physisporinus vitreus, Picea abies, wood permeability
07/2006 | Holzforschung, Walter de GruyterUltrastructural changes in a holocellulose pulp revealed by enzymes, thermoporosimetry and atomic force microscopy
To increase our knowledge of the ultrastructure within softwood fibres, enzymatic treatment, thermoporosimetry, light microscopy, and atomic force microscopy with image analysis were used to investigate the structure of holocellulose softwood pulp fibres...
Keywords: atomic force microscopy, cell wall, cellulose, drying, enzyme, fibril, hemicellulases, hemicellulose, holocellulose, Norwegian spruce, Picea abies, pores, pore size, pore volume, refining, ultrastructure
11/2005 | Holzforschung, Walter de GruyterExtraction of galactoglucomannan from spruce wood with pressurised hot water
Sapwood chips and ground wood of spruce have been extracted with pressurised pure water in an accelerated solvent extractor at temperatures from 100 to 180°C...
Keywords: acetyl groups, galactoglucomannan, hemicelluloses, hot-water extraction, lignin, molar mass, Picea abies, pressurised extraction, spruce wood, xylan
11/2008 | Holzforschung, Walter de GruyterExploring Scots pine fibre development mechanisms during TMP processing: Impact of cell wall ultrastructure (morphological and topochemical) on negative behaviour
A study was carried out aiming at understanding the fundamental reasons for different fibre behaviour exhibited by Norway spruce and Scots pine causing large energy consumption differences during thermomechanical pulping (TMP)...
Keywords: cell wall ultrastructure, defibration, fibre development, glucomannan, immunogold-EM, lignin, Picea abies, Pinus sylvestris, scanning electron microscopy (SEM), shives, S1 layer, S2 layer, transmission electron microscopy (TEM), thermomechanical pulping (TMP)
09/2008 | Holzforschung, Walter de GruyterComposition of callus resin of Norway spruce, Scots pine, European larch and Douglas fir
On damage of conifer trees, oleoresin is exuded onto the tree stem. The oleoresin is typically composed of monoterpenes and resin acids...
Keywords: abietadiene, abietol, callus, callus resin, hydroxycinnamic acids, Larix decidua, lignan, oleoresin, Picea abies, Pinus sylvestris, Pseudotsuga menziesii, resin, Überwallungsharz
07/2008 | Holzforschung, Walter de GruyterVariation of tracheid length within annual rings of Scots pine and Norway spruce
Variation of tracheid length was studied within individual annual rings of Scots pine (
Keywords: earlywood, latewood, Picea abies, Pinus sylvestris
01/2008 | Holzforschung, Walter de Gruyter