Leaf-fiber lignins of Phormium varieties compared bysolid-state 13C NMR spectroscopy
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Roger H. Newman
Abstract
Solid-state NMR spectroscopy was used to determine total lignin and to distinguish between the syringyl and guaiacyl components of Phormium leaves. Fibers obtained from the upper (shiny) and lower (dull) surfaces of a P. tenax leaf showed guaiacyl lignin contents of 1.5% and 5.4% by weight, respectively. Guaiacyl lignin is known to have poor photostability, so the analyses supported a traditional view of the upper-surface fibers as the more suitable for textiles. All other analyses involved mixtures of fibers from both upper and lower surfaces. They showed no detectable differences in guaiacyl content between leaves within a ramet, or between ramets in a P. tenax bush, with a mean value of 2.2% for 20 leaves. There were no detectable differences in guaiacyl content between bushes of the variety Taeore grown at different sites, with a mean value of 2.7% for 6 sites. There were detectable differences in guaiacyl content between 15 named varieties grown at a single site, with values as low as 2.3% and as high as 4.5%. Lowest guaiacyl contents were found in varieties traditionally used for textiles. The highest guaiacyl lignin contents, 6.0% and 5.8%, were found in P. cookianum and in a plant grown from stock obtained at Norfolk Island. Syringyl lignin contents were relatively uniform between varieties, with a mean value of 6.7%.
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©2005 by Walter de Gruyter Berlin New York
Articles in the same Issue
- Obituary
- The role of non-phenolic lignin in chlorate-forming reactions during chlorine dioxide bleaching of softwood kraft pulp
- Study of the oxygen effect on mechanical pulp lignin using an improved lignin isolation method
- Quantitative 1H NMR analysis of alkaline polysulfide solutions
- A comparative study on the degradation of cotton linters induced by carbonate and hydroxyl radicals generated from peroxynitrite
- The carbonate radical as one-electron oxidant of carbohydrates in alkaline media
- Leaf-fiber lignins of Phormium varieties compared bysolid-state 13C NMR spectroscopy
- Antifungal activity of iridoid glycosides from the heartwood of Gmelina arborea
- Antioxidant activity of different components of pine species
- Dislocations in Norway spruce fibres and their effect on properties of pulp and paper
- Isolation and identification of antifungal compounds from Amboyna wood
- Biomechanical pulping of spruce wood chips with Streptomyces cyaneus CECT 3335 and handsheet characterization
- Three-dimensional visualisation of bacterial decay in individual tracheids of Pinus sylvestris
- Mass loss and moisture dynamics of Scots pine (Pinus sylvestris L.) exposed outdoors above ground in Sweden
- The influence of cation and anion structure of new quaternary ammonium salts on adsorption and leaching
- Speciation of arsenic and chromium in the leachate from chromated copper arsenate (CCA) type C treated southern pine (Pinus spp.)
- Metal chelation studies relevant to wood preservation.1. Complexation of propyl gallate with Fe2+
- Comparison of UV and confocal Raman microscopy to measure the melamine–formaldehyde resin content within cell walls of impregnated spruce wood
- Comparison of Pinus taeda L. wood property calibrations based on NIR spectra from the radial-longitudinal and radial-transverse faces of wooden strips
- Detection of failures of adhesively bonded joints using the acoustic emission method
- Effect of cross-sectional change of a board specimen on stress wave velocity determination
- Comments on the experimental methodology for determination of the hygro-mechanical properties of wood
- Properties of chemically and mechanically isolated fibres of spruce (Picea abies [L.] Karst.). Part 1: Structural and chemical characterisation
- Properties of chemically and mechanically isolated fibres of spruce (Picea abies[L.] Karst.). Part 2: Twisting phenomena
Articles in the same Issue
- Obituary
- The role of non-phenolic lignin in chlorate-forming reactions during chlorine dioxide bleaching of softwood kraft pulp
- Study of the oxygen effect on mechanical pulp lignin using an improved lignin isolation method
- Quantitative 1H NMR analysis of alkaline polysulfide solutions
- A comparative study on the degradation of cotton linters induced by carbonate and hydroxyl radicals generated from peroxynitrite
- The carbonate radical as one-electron oxidant of carbohydrates in alkaline media
- Leaf-fiber lignins of Phormium varieties compared bysolid-state 13C NMR spectroscopy
- Antifungal activity of iridoid glycosides from the heartwood of Gmelina arborea
- Antioxidant activity of different components of pine species
- Dislocations in Norway spruce fibres and their effect on properties of pulp and paper
- Isolation and identification of antifungal compounds from Amboyna wood
- Biomechanical pulping of spruce wood chips with Streptomyces cyaneus CECT 3335 and handsheet characterization
- Three-dimensional visualisation of bacterial decay in individual tracheids of Pinus sylvestris
- Mass loss and moisture dynamics of Scots pine (Pinus sylvestris L.) exposed outdoors above ground in Sweden
- The influence of cation and anion structure of new quaternary ammonium salts on adsorption and leaching
- Speciation of arsenic and chromium in the leachate from chromated copper arsenate (CCA) type C treated southern pine (Pinus spp.)
- Metal chelation studies relevant to wood preservation.1. Complexation of propyl gallate with Fe2+
- Comparison of UV and confocal Raman microscopy to measure the melamine–formaldehyde resin content within cell walls of impregnated spruce wood
- Comparison of Pinus taeda L. wood property calibrations based on NIR spectra from the radial-longitudinal and radial-transverse faces of wooden strips
- Detection of failures of adhesively bonded joints using the acoustic emission method
- Effect of cross-sectional change of a board specimen on stress wave velocity determination
- Comments on the experimental methodology for determination of the hygro-mechanical properties of wood
- Properties of chemically and mechanically isolated fibres of spruce (Picea abies [L.] Karst.). Part 1: Structural and chemical characterisation
- Properties of chemically and mechanically isolated fibres of spruce (Picea abies[L.] Karst.). Part 2: Twisting phenomena
