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hardwood
Items for "hardwood"
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 GruyterErythro /threo ratio of ?-O-4-5 structures as an important structural characteristic of lignin. Part 4: Variation in the erythro /threo ratio in softwood and hardwood lignins and its relati
The proportion of
Keywords: ?-O-4 structure, erythro/threo ratio, hardwood, Klason lignin, lignin, methoxyl, nitrobenzene oxidation, ozonation, softwood, stereochemistry, syringyl/guaiacyl ratio
05/2005 | Holzforschung, Walter de GruyterSurface lignin and extractives on hardwood RDH kraft pulp chemically characterized by ToF-SIMS
The chemical characteristics of lignin and extractives on the outermost surface of hardwood rapid displacement heating (RDH) kraft pulp were studied using time-of-flight secondary ion mass spectrometry (ToF-SIMS)...
Keywords: birch, chemical structure, Composition, extractives, hardwood, kraft pulp, lignin, rapid displacement heating (RDH), secondary ion mass spectrometry, Surface, surface analysis, TCF bleaching, time-of-flight secondary ion mass spectrometry (ToF-SIMS)
09/2005 | Holzforschung, Walter de GruyterHigh-consistency ozonation of hardwood kraft pulp
At present, ozone is one of the main chemicals in elemental chlorine-free (ECF) and totally chlorine-free (TCF) bleaching sequences...
Keywords: brightness, hardwood, hexenuronic acid groups, kappa number, Kinetics, kraft pulp, lignin, Ozone, shrinking core model, viscosity
11/2006 | Holzforschung, Walter de GruyterCharacterization of thin water layers in pulp by tritium exchange. Part 1: Methods development
A new technique for measuring the monolayer water content of fiber is presented. Tritiated water is added to a pulp/water suspension, whereupon the tritium partitions between the bulk water and the pulp...
Keywords: bound water, fiber, free water, hardwood, Hydrogen bond, Isotope exchange, softwood, surface area, Tritium
03/2007 | Holzforschung, Walter de GruyterHydrothermal dissolution of mixed southern hardwoods
A hydrothermal dissolution profile of wood components cellulose, hemicelluloses, and lignin of hardwood during autohydrolysis for 100 min at temperatures from 130 to 170°C in a modified accelerated solid extraction system (Dionex ASE-100) is described...
Keywords: autohydrolysis, Extraction, hardwood, hemicelluloses, lignin, oligosaccharides, xylan
09/2008 | Holzforschung, Walter de Gruyter