Assessment of the early signs of decay of Populus deltoides wafers exposed to Trametes versicolor by near infrared spectroscopy
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Benny Green
,
Darrel D. Nicholas
Abstract
The use of near infrared (NIR) spectroscopy to predict levels of white-rot degradation in Populus deltoides (cottonwood) by Trametes versicolor over the couse of 1–8 days was investigated. NIR spectra were collected from cross-sectional faces following laboratory soil block decay tests. Spectra in the range of 1100–2400 nm were calibrated in terms of mass loss, compression strength and exposure period based on data of standard methods. The first and second derivatives of NIR spectra were also included into the calibration, which was done by partial least squares regression. The best calibrations with the strongest R2 values were obtained in terms of exposure period (R2 0.92, second derivative), mass loss (R2 0.89, first derivative) and compression strength (R2 0.51, second derivative). As far as the validation (prediction) statistics are concerned, the following data were obtained: exposure period (R2=0.71; RPDp 1.81, second derivative), mass loss prediction (R2=0.43; RPDp=0.67, first derivative) and compression strength R2=0.28; RPDp=1.14 (second derivative). The weak statistical data can be interpreted only in a way that the data are not robust and thus an early prediction of fungal attack by NIR spectroscopy is not yet reliable.
©2012 by Walter de Gruyter Berlin Boston
Artikel in diesem Heft
- Original Papers
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- Influence of specimen configuration on the measurement of the off-axis Young’s modulus of wood by vibration tests
- Effect of lignin and hemicelluloses on the tensile strength of micro-veneers determined at finite span and zero span
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- Assessment of the early signs of decay of Populus deltoides wafers exposed to Trametes versicolor by near infrared spectroscopy
- Community analysis of preservative-treated southern pine (Pinus spp.) using terminal restriction fragment length polymorphism (T-RFLP) analysis. Part 1: Fungal field study
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- Phylogenetic analysis and discoloration characteristics of major molds inhabiting woods. Part 3. Genus Cladosporium
- Identification of biochemical differences between the sapwood and transition zone in Robinia pseudoacacia L. by differential display of proteins
- Short Notes
- Reduction of formaldehyde emission from light MDF panels by adding chestnut shell flour
- On the structure of the active compound in mass deacidification of paper
- Meetings
- Meetings
- Masthead
- Masthead
Artikel in diesem Heft
- Original Papers
- Synthesis of glucose esters from cellulose in ionic liquids
- A new soy flour-polyepoxide adhesive system for making interior plywood
- Hydrophobisation of mechanical pulp fibres with sodium dodecyl sulphate functionalised layered double hydroxide particles
- Effect of pH on lignin analysis by Raman spectroscopy
- Fractionation and characterization of lignin carbohydrate complexes (LCCs) of Eucalyptus globulus in residues left after MWL isolation. Part I: Analyses of hemicellulose-lignin fraction (HC-L)
- Surface and internal micro/ultrastructure of TMP fibres produced during high-intensity refining elucidate the development of pulp and paper properties
- Mechanoradical formation and its effects on birch kraft pulp during the preparation of nanofibrillated cellulose with Masuko refining
- Influence of specimen configuration on the measurement of the off-axis Young’s modulus of wood by vibration tests
- Effect of lignin and hemicelluloses on the tensile strength of micro-veneers determined at finite span and zero span
- Revisiting the neutral axis in wood beams
- Relationship between copper species in solution and leaching from alkaline copper quat (ACQ) treated wood
- Assessment of the early signs of decay of Populus deltoides wafers exposed to Trametes versicolor by near infrared spectroscopy
- Community analysis of preservative-treated southern pine (Pinus spp.) using terminal restriction fragment length polymorphism (T-RFLP) analysis. Part 1: Fungal field study
- Community analysis of preservative-treated southern pine (Pinus spp.) using terminal restriction fragment length polymorphism (T-RFLP) analysis. Part 2: Bacteria field study
- Phylogenetic analysis and discoloration characteristics of major molds inhabiting woods. Part 3. Genus Cladosporium
- Identification of biochemical differences between the sapwood and transition zone in Robinia pseudoacacia L. by differential display of proteins
- Short Notes
- Reduction of formaldehyde emission from light MDF panels by adding chestnut shell flour
- On the structure of the active compound in mass deacidification of paper
- Meetings
- Meetings
- Masthead
- Masthead
