Fragmentation of Suberin and Composition of Aliphatic Monomers Released by Methanolysis of Cork from Quercus suber L.,Analysed by GC-MS, SEC and MALDI-MS
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M.F. Bento
Summary
Suberin from extractive-free cork from Quercus suber L. was depolymerised by methanolysis using different sodium methanolate (NaOMe) concentrations. 1% and 3% NaOMe completely removed suberin from cork (54%–56% of extractive-free cork), but for lower concentrations there was incomplete solubilisation; with 0.05% NaOMe, only approximately 80% of total suberin was removed. The monomeric composition of the extracts differed significantly: for the 0.05% NaOMe, only alkanoic acids and diacids were found; the yield of v-hydroxy acids increased with reactant concentration, as well as alkanols and ferulic acid.
Results from light scattering, SEC and MALDI-MS showed that soluble oligomeric fragments containing suberinic acids were present in the methanolysis mixture. The molecular weight of these oligomeric fragments decreased with higher sodium methanolate concentrations.
Copyright © 2001 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- The Influence of Rays on the Transverse Elastic Anisotropy in Green Wood of Deciduous Trees
- The Effect of Varying Latewood Proportion on the Radial Distribution of Lignin Content in a Pine Stem
- Effects of Environmental Factors on the Color of Sugi (Cryptomeria japonica D. Don) Yellowish Heartwood
- Influence of Tannin-Copper Complexes as Preservatives for Wood on Mechanism of Decomposition by Brown-Rot Fungus Fomitopsis palustris
- Characteristics of Sludges Produced by Destabilization of CCA Preservative Solutions
- Extractives and Structural Components in Wood and Bark of Endemic Oak Quercus vulcanica Boiss
- Fragmentation of Suberin and Composition of Aliphatic Monomers Released by Methanolysis of Cork from Quercus suber L.,Analysed by GC-MS, SEC and MALDI-MS
- Controlled Assembly of Glucuronoxylans onto Cellulose Fibres
- Solid State NMR Studies on Inhomogeneous Structure of Fibre Wall in Kraft Pulp
- Characterizing the Surface Roughness of Thermomechanical Pulp Fibers with Atomic Force Microscopy
- Thermal Decomposition of Cellulose Crystallites in Wood
- Damage and Fracture Mechanisms during Mode I and III Loading of Wood
- Directional Characteristics of Near Infrared Light Reflected from Wood
- An Investigation of Selected Factors that Influence Hardwood Wettability
- Intra-Ring Variations in the Rolling Shear Modulus of Spruce Wood
- Study on Alkali-Accessible Chromophores from Unbleached Kraft Pulp
- Addition of Boron Based Compound in the LVL Glueline: Effect on the Mechanical Properties and the Leaching of Boron
