SearchPublisher and Institutes
You are here: Home :: Keyword index :: Kel bis mat :: LiCl/DMI - lignin biosynthetic 
lignin
Items for "lignin"
Chemical composition of 36 Brazilian Amazon forest wood species
Woods of 36 tree species from the Brazilian Amazon forest have been extracted and analyzed by means of total hydrolysis...
Keywords: cellulose, extractives, hemicelluloses, lignin, sugars, summative analysis, total hydrolysis of wood, tropical wood species
05/2007 | Holzforschung, Walter de GruyterApplication of confocal Raman spectroscopy for the topochemical distribution of lignin and cellulose in plant cell walls of beech wood (Fagus sylvatica L.) compared to UV microspectrophotometry
In a comparative study, the topochemical distribution of lignin in individual cell wall layers of beech wood tissue was determined by confocal Raman spectroscopy and scanning UV microspectrophotometry...
Keywords: cellulose, confocal Raman spectroscopy, lignin, scanning UV microspectrophotometry, wood
08/2004 | Holzforschung, Walter de GruyterOn-line study of lignin behaviour in dilute alkaline solution by the SEC-UV method
The dynamic method for monitoring ionisation of the lignin functional groups in a 0.1 N NaOH solution at ambient temperature by means of the SEC technique with multiwave UV detection was performed...
Keywords: alkaline solution, chemical composition distribution curve, lignin, multi-wave UV detection, Sec
08/2004 | Holzforschung, Walter de GruyterVoltammetric analysis of the bleachability of softwood kraft pulps
Kraft and oxygen delignified pulps with various kappa numbers were prepared from black spruce and western hemlock chips...
Keywords: bleachability, ECF bleaching, electrochemical analysis, kappa number, kraft pulp, lignin, reactivity, Redox potential, softwood, Voltammetry
10/2004 | Holzforschung, Walter de GruyterLignin reactions in oxygen delignification catalysed by Mn(II)-substituted molybdovanadophosphate polyanion
The lignin oxidation in the oxygen delignification/bleaching process catalysed by Mn(II) substituted heptamolybdopentavanadophosphate polyanion (HPA-5-MnII) was studied using monomeric lignin model compounds and
Keywords: delignification, lignin, oxidative catalysis, oxygen, polyoxometalate
10/2004 | Holzforschung, Walter de GruyterEnhanced wet tensile paper properties via dielectric-barrier discharge
Dielectric-barrier discharge treatment was used to modify fully bleached softwood kraft and unbleached softwood thermomechanical pulp handsheets...
Keywords: bonding, cellulose, dielectric-barrier discharge, dimensional stability, fiber modification, fiber swelling, kraft pulp, lignin, Plasma, tensile, thermomechanical pulp, wet strength
01/2005 | Holzforschung, Walter de GruyterLeaf-fiber lignins of Phormium varieties compared bysolid-state 13C NMR spectroscopy
Solid-state NMR spectroscopy was used to determine total lignin and to distinguish between the syringyl and guaiacyl components of
Keywords: leaf fibers, lignin, Phormium tenax, Phormium cookianum, solid-state NMR
02/2005 | Holzforschung, Walter de GruyterMolecular dynamics study of lignin constituents in water
Molecular dynamics simulations were used to explore the distribution of linkages in coumaryl alcohol and coniferyl alcohol systems, including monomeric systems and monomers interacting with ?-O4 dimers, respectively...
Keywords: coniferyl alcohol, coumaryl alcohol, lignin, molecular dynamics, Polymerization
05/2005 | Holzforschung, Walter de GruyterCharacterization of active oxygen species under oxygen-alkali bleaching conditions
The reactivities of active oxygen species toward a non-phenolic lignin model compound, 1-(3,4-dimethoxyphenyl)-1,2-ethanediol (veratryl glycol, VG), and a carbo-hydrate model compound, methyl ?-D-glucopyranoside (MGP), were examined and compared under practical oxygen bleaching conditions...
Keywords: active oxygen species, carbohydrate, chain-type reaction, Hydroxyl radical, lignin, oxygen bleaching
05/2005 | 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 GruyterNMR studies on Fraser fir Abies fraseri (Pursh) Poir. lignins
The composition of mature, juvenile uninfested and juvenile infested Fraser fir wood (Rotholz) and the structures of lignins isolated from these woods were elucidated to verify differences between juvenile and mature wood and the effect of balsam woolly adelgid (BWA) infestation...
Keywords: balsam woolly adelgid (BWA), carbohydrate composition, Fraser fir, juvenile wood, lignin, NMR spectroscopy, Rotholz wood
09/2005 | Holzforschung, Walter de GruyterXPS in combination with mercurization – incorporation of mercury into different morphological parts of an unbleached softwood kraft pulp
In this study the rate and extent of mercury incorporation into different morphological fractions, i.e., fibers, mechanically peeled fibers, primary and secondary fines, of an unbleached softwood kraft pulp were evaluated...
Keywords: ESCA, extractives, fiber surfaces, fines, lignin, mercurization, softwood kraft pulp, XPS
01/2006 | Holzforschung, Walter de GruyterComparison of different XPS methods for fiber surface analysis
Three different XPS methods based on the O/C atomic ratio, C1 carbon content, and Hg amount are compared in this study to quantify the surface coverage of various pulp fiber surfaces by lignin and extractives...
Keywords: ESCA, extractives, fiber surfaces, lignin, mercurization, softwood kraft pulp, thermomechanical pulp, wheat-straw pulp, XPS
01/2006 | Holzforschung, Walter de GruyterRapid analysis of transgenic trees using transmittance near-infrared spectroscopy (NIR)
Genetic engineering of trees has generated a large amount of interest in the development of highly improved transgenic trees...
Keywords: cellulose, lignin, near-infrared spectroscopy (NIR), S/G ratio, transgenic tree, transmittance, xylose
01/2006 | Holzforschung, Walter de GruyterThe influence of lignin chemistry and ultrastructure on the pulping efficiency of clonal aspen (Populus tremuloides Michx.)
The variation in wood chemistry among aspen clones of similar age, harvested from a common site in northern British Columbia, Canada, was evaluated...
Keywords: aspen, delignification, guaiacyl lignin, kraft pulping, lignin, molecular mass, MWL, MWELsol, MWELinsol, NMR, nitrobenzene oxidation, quantitative NMR, syringyl lignin, thioacidolysis
03/2006 | Holzforschung, Walter de GruyterCritical comparison of methods for surface coverage by extractives and lignin in pulps by X-ray photoelectron spectroscopy (XPS)
Different methods for estimation of the surface coverage by extractives and lignin were critically compared...
Keywords: chemical pulp, ESCA, lignin, surface chemistry, spectrometry, thermomechanical pulp, wood extractives, XPS
03/2006 | Holzforschung, Walter de GruyterLignin antioxidants for preventing oxidation damage of DNA and for stabilizing polymeric composites
The antioxidative behavior of various lignin preparations derived from chemical wood treatment for paper production was examined...
Keywords: antioxidant, DNA, lignin, polypropylene, rubber
03/2006 | Holzforschung, Walter de GruyterEffect of poly(ethylene oxide) molecular mass on miscibility and hydrogen bonding with lignin
The effect of the molecular mass of poly(ethylene oxide) (PEO) on lignin-PEO blends was studied using thermal analysis and FT-IR...
Keywords: differential scanning calorimetry, DSC, FT-IR, lignin, miscibility, poly(ethylene oxide), polymer blends, Thermal analysis
05/2006 | Holzforschung, Walter de GruyterApplication of scanning UV microspectrophotometry for the topochemical detection of lignin within individual cell walls of brown-rotted Scots pine (Pinus sylvestris L.) sapwood
Brown rotted Scots pine (
Keywords: brown rot, Coniophora puteana, lignin, scanning UV microspectrophotometry, Scots pine (Pinus sylvestris L.)
11/2006 | Holzforschung, Walter de GruyterSpatial relationships between polymers in Sitka spruce: Proton spin-diffusion studies
The spatial arrangement of polymers in Sitka spruce (
Keywords: cell wall models, cellulose, hemicellulose, lignin, NMR spectroscopy, supramolecular structure of wood
11/2006 | 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 GruyterLipid and lignin composition of woods from different eucalypt species
The lipid and lignin compositions of woods from the eucalypt species
Keywords: eucalypt wood, lignin, lipids, sitosterol, sitosteryl 3?-d-glucopyranoside, sitosterol esters, S/G ratio
03/2007 | Holzforschung, Walter de GruyterDetermination of ethylenic residues in wood and TMP of spruce by FT-Raman spectroscopy
A method based on FT-Raman spectroscopy is proposed for determining in situ concentrations of ethylenic residues in softwood lignin...
Keywords: coniferaldehyde, coniferyl alcohol, DHP, ethylenic residues, lignin, quantification, Raman, thermomechanical pulp, wood
11/2008 | Holzforschung, Walter de GruyterTowards novel wood-based materials: Chemical bonds between lignin-like model molecules and poly(furfuryl alcohol) studied by NMR
Wood modification with furfuryl alcohol is a non-toxic alternative to conventional preservation treatments...
Keywords: 2D correlation NMR, furfurylation, HMBC, HMQC, lignin, Polymerization, preservation, renewable material, wood modification
11/2008 | Holzforschung, Walter de GruyterValence band spectroscopy on lignin
The valence band of lignin and sputtered lignin was studied by X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS) and metastable induced electron spectroscopy (MIES)...
Keywords: coniferyl alcohol, lignin, Metastable Induced Electron Spectroscopy (MIES), photoelectron spectroscopy (UPS, XPS, ESCA), valence band
11/2008 | 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 GruyterUV resonance Raman spectroscopic study of photodegradation of hardwood and softwood lignins by UV laser
The effect of laser irradiation (Ar+ ion laser, 244 nm) on photodegradation of lignin in silver birch and rubberwood as hardwoods and spruce and chir pine as softwoods has been investigated by UV resonance Raman spectroscopy (UVRRS)...
Keywords: cellulose, lignin, photodegradation, quinone, resonance Raman spectroscopy, UV laser, UV resonance Raman spectroscopy (UVRRS), wood
03/2008 | Holzforschung, Walter de GruyterStudy of kinetics of reaction of lignin model compounds with propylene oxide
The etherification of phenolic groups has been found to inhibit photodegradation in wood and lignin rich pulps...
Keywords: activation energy, etherification, gas chromatogram-mass spectrum (GC-MS), guaiacol, lignin, Phenol, UV-Vis spectroscopy
03/2008 | Holzforschung, Walter de GruyterRevisiting the mechanism of ?-O-4 bond cleavage during acidolysis of lignin. Part 1: Kinetics of the formation of enol ether from non-phenolic C6-C2 type model compounds
The reaction route of a dimeric non-phenolic C6-C2 type lignin model compound, 2-(2-methoxyphenoxy)-1-(3,4-dimethoxyphenyl)ethanol (
Keywords: acidolysis, alkyl-aryl ether, ?-O-4 bond, enol, Kinetics, lignin
03/2008 | Holzforschung, Walter de GruyterFixation of copper-protein formulation in wood: Part 2. Molecular mechanism of fixation of copper(II) in cellulose, lignin and wood studied by EPR
Electron paramagnetic resonance (EPR) spectra were recorded for copper(II) ions in cellulose, lignin and pine sapwood impregnated with a water based formulation containing CuSO4·5 H2O, tannic acid and animal protein SOLUTEIN...
Keywords: cellulose, copper preservative fixation, electron paramagnetic resonance, lignin, Pinus sylvestris
05/2008 | Holzforschung, Walter de GruyterMonolignol dehydrogenative polymerization in vitro in the presence of dioxane and a methylated ?-?? dimer model compound
Lignin formation is believed to occur by polymerization of resonance-stabilized monolignol radicals formed by enzymatic oxidation...
Keywords: dehydrogenation polymers (DHP), lignin, pinoresinol dimethyl ether, replication, template polymerization
09/2008 | Holzforschung, Walter de GruyterStudies on the dehydrogenative polymerization of monolignol ?-glycosides: Part 5. UV spectroscopic monitoring of horseradish peroxidase-catalyzed polymerization of monolignol glycosides
Horseradish peroxidase (HRP)-initiated dehydrogenative polymerizations of guaiacyl (G) and syringyl (S)-type monolignol ?-
Keywords: copolymerization, dehydrogenation polymer (DHP), dehydrogenative polymerization, horseradish peroxidase (HRP), lignin, monolignol ?-d-glucoside, quinone methide, UV spectroscopy
09/2008 | 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 GruyterStudies on the dehydrogenative polymerizations (DHPs) of monolignol ?-glycosides: Part 4. Horseradish peroxidase-catalyzed copolymerization of isoconiferin and isosyringin
Horseradish peroxidase (HRP)-catalyzed dehydrogenative copolymerization of guaiacyl (G)-type monolignol glycoside (isoconiferin, coniferyl alcohol ?-
Keywords: copolymerization, dehydrogenation polymer (DHP), dehydrogenative polymerization, horseradish peroxidase (HRP), lignin, monolignol glycoside
09/2008 | 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 GruyterA new and facile method for isolation of lignin from wood based on complete wood dissolution
A new method for the isolation of lignin in high yield from wood and pretreated wood is presented, avoiding the liquid-solid extraction step of the classical milled wood lignin (MWL) isolation...
Keywords: beech, dissolved wood lignin (DWL), lignin, lignin isolation, milled wood lignin (MWL), nuclear magnetic resonance
01/2008 | Holzforschung, Walter de GruyterPyrolytic cleavage mechanisms of lignin-ether linkages: A study on p -substituted dimers and trimers
Pyrolytic cleavage mechanisms of lignin-ether linkages were studied with some dimers and trimers which have various
Keywords: ?-ether, bond dissociation energy (BDE), cleavage mechanism, dimer, heterolytic, homolytic, lignin, pyrolysis, substituent effect, trimer
01/2008 | Holzforschung, Walter de GruyterIsolation and characterization of lignins from Eucalyptus grandis Hill ex Maiden and Eucalyptus globulus Labill. by enzymatic mild acidolysis (EMAL)
Despite the growing importance of
Keywords: derivatization followed by reductive cleavage (DFRC), enzymatic mild acidolysis lignin (EMAL), Eucalyptus, lignin, milled wood lignin (MWL), 31P nuclear magnetic resonance spectroscopy
01/2008 | Holzforschung, Walter de GruyterComparative effect of ozone, chlorine dioxide, and hydrogen peroxide on lignin: Reactions affecting pulp colour in the final bleaching stage
Several lignin-like model compounds (vanillin, syringaldehyde, guaiacol, syringol,
Keywords: bleaching, chlorine dioxide, colour, Hydrogen Peroxide, lignin, mechanisms, model compounds, Ozone, reactions
11/2007 | Holzforschung, Walter de GruyterDirect method for the determination of phenolic hydroxyl groups in pulp
For evaluation of changes in phenolic lignin units during kraft pulping and bleaching, a direct method based on UV reflectance measurements of pulp handsheets was tested...
Keywords: bleaching, kraft pulping, lignin, Phenols, UV spectroscopy
11/2007 | Holzforschung, Walter de GruyterAnalysis of wood tissues by time-of-flight secondary ion mass spectrometry
The distribution of lignin, carbohydrates, and metal ions on the surface of spruce and aspen wood tissue sections was investigated by time-of-flight secondary ion mass spectrometry (ToF-SIMS)...
Keywords: aspen, bordered pit tori, carbohydrates, compression wood, field-emission scanning electron microscopy (FE-SEM), heartwood, lignin, Metals, ray parenchyma cells, sapwood, spruce, surface distribution, time-of-flight secondary ion mass spectrometry (ToF-SIMS) images
11/2007 | Holzforschung, Walter de Gruyter