Measuring compression wood severity in spruce

As the severity of compression wood influences the mechanical and chemical properties of wood it is desirable to be able to measure compression wood severity. However, so far no satisfactory method has been reported in the literature. Here we describe how scanning FTIR micro-spectroscopy can be empl...

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Veröffentlicht in:Wood science and technology 2009-05, Vol.43 (3-4), p.279-290
Hauptverfasser: Altaner, Clemens M, Tokareva, Elena N, Wong, Janet C. T, Hapca, Adrian I, McLean, J. Paul, Jarvis, Michael C
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container_end_page 290
container_issue 3-4
container_start_page 279
container_title Wood science and technology
container_volume 43
creator Altaner, Clemens M
Tokareva, Elena N
Wong, Janet C. T
Hapca, Adrian I
McLean, J. Paul
Jarvis, Michael C
description As the severity of compression wood influences the mechanical and chemical properties of wood it is desirable to be able to measure compression wood severity. However, so far no satisfactory method has been reported in the literature. Here we describe how scanning FTIR micro-spectroscopy can be employed to achieve CW severity measurements on increment cores of Norway spruce (Picea abies (L. Karst.) and Sitka spruce (Picea sitchensis (Bong.) Carrière). Radial wood strips were converted into sawdust by a process that maintained their spatial orientation. Samples prepared in this way were scanned with an FTIR-microscope in reflective mode and from the spectra obtained a CW-indicator was calculated representing aromatic and carboxyl signals. This FTIR CW-indicator correlated well with alternative CW identification techniques (namely microfibril angle, transmitted light and immunolabelling of beta 1-4 galactan), which have been used to validate the method. Repeatability of the measurements was good and no systematic difference between spruce species was found. The achievable resolution of the measurements was of sub-mm order. The CW indicator described offers the opportunity to correlate CW severity with mechanical wood properties in spruce.
doi_str_mv 10.1007/s00226-008-0226-1
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subjects Biomedical and Life Sciences
Ceramics
Chemical properties
Composites
Compression
Compression tests
Engineering Sciences
Glass
Infrared spectroscopy
Karst
Life Sciences
Machines
Manufacturing
Mechanics
Mechanics of materials
Natural Materials
Organic chemistry
Original
Physics
Picea abies
Picea sitchensis
Pine trees
Processes
Sawdust
Spectrum analysis
Wood Science & Technology
title Measuring compression wood severity in spruce
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