Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 1. Mild extraction by ultrasonication and quantification of extractives by reverse-phase HPLC
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Russell J. Chedgy
Abstract
Western red cedar (Thuja plicata Donn) heartwood samples were extracted in methanol. Reverse-phase HPLC with UV detection was used for extractive separation and analysis. Six major extractives were quantified by comparing analyte response with the response factor of an internal standard using single-point calibration. The limit of detection of the method was estimated as (μg ml-1): (–)-plicatic acid, 0.6; γ-thujaplicin, 3.0; β-thujaplicin, 3.0; β-thujaplicinol, 3.0; thujic acid, 0.6; and methyl thujate, 1.2. Yields were 36% higher for powdered than for sliced samples. A temperature of 4°C during ultrasonication yielded 16% more (–)-plicatic acid than in non-cooled extractions, but did not significantly increase yields for the remaining five compounds. The recovery and repeatability of the extraction method were assessed by adding the aromatic compounds methoxyhydroquinone and 2-acetonaphthone to heartwood samples before extraction. The recovery yield was ∼90% with ∼5% variability.
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Articles in the same Issue
- Characterization of thin water layers in pulp by tritium exchange. Part 1: Methods development
- Characterization of thin water layers in pulp by tritium exchange. Part 2: Effect of refining on water absorption
- Characterizing wood fiber and particle length with a mixture distribution and a segmented distribution
- Effect of photolysis on 17th/18th century paper
- Changes in the cell wall volume of a number of wood species due to reaction with acetic anhydride
- A novel simple route to wood acetylation by transesterification with vinyl acetate
- Formation and properties of nanocomposites made up from solid aspen wood, melamine-urea-formaldehyde, and clay
- Ellagitannins from Portuguese oak wood (Quercus pyrenaica Willd.) used in cooperage: influence of geographical origin, coarseness of the grain and toasting level
- Epimeric phenylpropanoid glycosides from inner bark of Paulownia coreana Uyeki
- Lipid and lignin composition of woods from different eucalypt species
- A hysteresis model suitable for numerical simulation of moisture content in wood
- Simple estimation of critical stress intensity factors of wood by tests with double cantilever beam and three-point end-notched flexure
- Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 1. Mild extraction by ultrasonication and quantification of extractives by reverse-phase HPLC
- Screening fungi tolerant to Western red cedar (Thuja plicata Donn) extractives. Part 2. Development of a feeder strip assay
- Contribution of hardness to the natural resistance of a range of wood species to attack by the marine borer Limnoria
- Biodeterioration of treated Pinus radiata timber by Australian decay fungi and the termite Coptotermes acinaciformis in laboratory bioassays and field conditions
- Development of an accelerated soil-contact decay test
- Obituary Dr. Bo Hortling (1942–2006)
