Rapid discoloration and checking of wooden surfaces when exposed outdoors has caused wood to fall out of favor as an outdoor building material, especially in applications where appearance is important. The surface appearance of wood products exposed outdoors can be improved through the application of film forming coatings or by...
Engineered wood composites are used in many structural applications and are intended for dry use. However, these materials may encounter significant amounts of wetting while in service, which can lead to structural failures. This study combined aspects of wood science, mechanics, structural engineering, and mycology to assess changes in material...
Western juniper and cinnamon essential oils were combined with ethanol at 2.5, 5, and 10% concentrations by weight and applied to hybrid poplar (Populus trichocarpa x P. deltoids) veneers by vacuum soaking to produce a naturally durable wood veneer with increased mechanical properties for use in structural composites. Half of...
The effects of incorporation of selected biocides on physical and mechanical properties of aspen strandboard were assessed using five copper-based preservatives or zinc borate at three retention levels. Tebuconazole or 4,5-dichloro-2-N-octyl-4-isothiazolin-3-one (DCOI) were added as co-biocides to selective copper-based treatments. Mold box tests showed that only panels treated with DCOI...
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JefferyJ. Morrell Frederick A. Kamke
The effects of incorporation of selected biocides
Plywood panels collected from thirty seven mills located
throughout the Pacific Northwest they were treated with chromated copper
arsenate Type C (CCA-C) or ammoniacal copper zinc arsenate (ACZA) using
modified full cell and full cell processes respectively. Preliminary
tests were performed to determine plywood sample size, replication, and
treating schedule....
The ability of the fluorescent-coupled lectins wheat germ
agglutinin (WGA) and concanavalin A (Con A) to react with selected
Basidiomycetes, Ascomycetes, and Fungi Imperfecti was evaluated using
pure cultures of thirty-five fungi grown on malt extract agar. WGA,
which is specific for residues of N-acetylglucosamine present in fungal
chitin, reacted...
Experiments investigated how the fumigant methylisothiocyanate
(MIT), Douglas-fir wood at various moisture contents (MC), and the
wood decay fungus Poria carbonica Overh., interacted to govern
overall fumigant effectiveness.
MIT decomposed in wood to form non-MIT residues at rates of
about 0.16%, 0.9%, and 1.6% of the total bound MIT per...
The links between forests, streamflow, and climate are poorly understood. Despite hundreds of studies over the past 60 years, fundamental questions of forests' effects on the hydrologic cycle remain unanswered. The hydrological cycle involves mutually-dependent biological and physical processes that operate at multiple scales of time and space, and this...