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Creator:: Morrell, Jeffrey J.
Abstract:: The resistance of three naturally durable heartwood species and a stranded giant bamboo product to fungal and termite (Coptotermes formosanus) attack was evaluated at a test site located near Hilo, Hawaii. Merbau (Intsia bijuga or I. palembanica) and ipe (Tabebuia spp.) were both exceptionally resistant to fungal and termite attack,...
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Full Text:: Wood-Based Materials to Fungal and Termite Attack in Non–Soil Contact Exposures Jeffrey J. Morrell

Creator:: Morrell, Jeffrey J.
Abstract:: The amounts of treated wood present at a wood recycling center in western Oregon were surveyed over a 10-year period. Treated wood was found at 106 of 112 inspections, but the levels never exceeded 2 percent of the volume present. The amount of treated wood averaged 0.15 percent of the...
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Full Text:: a Wood Recovery Center in Western Oregon Jeffrey J. Morrell Abstract The amounts of treated wood

Creator:: Morrell, Jeffrey J.
Abstract:: The bioassay with Aspergillus niger is a simple way of determining the presence and amount of pentachlorophenol or tributyltin oxide in wood, but it does not appear useful for measuring strongly fixed chemicals such as chromated copper arsenate, borate, and fluoride. Its effectiveness in detecting other preservatives has not been...
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Full Text:: JeHrey J. Morrell Assistant Professor Department of Forest Products, College of Forestry Oregon State

Creator:: Morrell, Jeffrey J.
Abstract:: The effect of various wood characteristics on decomposition of metham sodium to methylisothiocyanate in sixteen North American and Southeast Asian hardwoods and softwoods was investigated. While marked differences were noted in the degree of decomposition among some species, the relationship between decomposition and lignin content, extractive levels, wood pH, or...
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Full Text:: AFFECTED BY WOOD SPECIES, TEMPERATURE, AND MOISTURE CONTENT1 Jefrey J. Morrell Assistant Professor

Creator:: Ye, Min and Morrell, Jeffrey J.
Abstract:: The potential for preservative migration from treated wood exposed in or above aquatic environments has become a major concern in some parts of the United States. Best management practices (BMP) were designed to decrease the potential environmental footprint of treated wood, but there are few studies assessing the efficacy of...
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Full Text:: -mail:jesie329958@hotmail.com Jeffrey J. Morrell*{ Professor Department of Wood Science & Engineering Oregon

Creator:: Long, Brady and Morrell, Jeffrey J.
Abstract:: Preservative treatments are required whenever glued laminated beams are exposed outdoors. Treatments can be either water-based systems applied to individual laminations prior to layup or organic solvent–borne systems applied after the beams are fabricated. Water-based systems are not recommended for posttreatment because of concerns over checking and the potential for...
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Full Text:: Appearance and Flexural Properties of Douglas-Fir Glued Laminated Beams Brady Long Jeffrey J. Morrell

Creator:: Mankowski, Mark and Morrell, Jeffrey J.
Abstract:: The ability of white and brown rot fungi to colonize wood-plastic composites was investigated by measuring weight loss and anatomical changes. Three composite materials were evaluated. The material containing a 70/30 wood-high density polyethylene (HDPE) mixture was most susceptible to fungal attack, while two different 50/50 wood-HDPE composites experienced little...
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Full Text:: for a plastic-wood composite. Proc. Am. Wood-Preserv. Assoc. 89: 108-109 (Abstract). SIMONSEN, W. J

Creator:: Rui, Chen and Morrell, Jeffrey J.
Abstract:: Studies of the effects of various chemicals on fungal growth are difficult to perform on filamentous fungi because of the difficulty of observing the protoplasm through the rigid hyphal wall, and because most activity occurs in the region near the hyphal tip. However, hyphae can be exposed to certain enzymes...
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Full Text:: -DEGRADING FUNGI Chen Rui Graduate Research Assistant and Jeflrey J. Morrell Assistant Professor

Creator:: Rui, Chen and Morrell, Jeffrey J.
Abstract:: Hyphal fragments and protoplasts of two wood-degrading fungi, Postia placenta and Trametes versicolor, were used to examine the effects of two fungicides, copper sulfate and azaconazole, on fungal health (as measured by oxygen consumption, glucose utilization, potassium levels, cell regeneration, and copper uptake). Although both cell systems responded to the...
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Full Text:: Corvallis, OR 9733 1 and Jefrey J. Morrell Assistant Professor Department of Forest Products Oregon

Creator:: Morrell, Jeffrey J. and Huffman, Jacob
Abstract:: The levels of copper, chromium, and arsenic in soil surrounding CCA-treated posts and beneath CCA-treated stakes were investigated at a plot near Gainesville, Florida. Metal levels were elevated in soil immediately adjacent to the treated wood, but decreased with distance away or depth. Mean extractable arsenic levels ranged from 1.74...
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Full Text:: SURROUNDING POSTS TREATED WITH CHROMATED COPPER ARSENATE (CCA) Jeffrey J. Morrell† Professor Department of

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