Index Catalog // ScholarsArchive@OSU

Creator:: Morrell, Jeffrey J. and Oregon State University. Forest Research Laboratory
Abstract:: The specification, inspection, and remedial treatment of utility poles are addressed. Included are discussions of enhancing specifications for improved performance, techniques for detecting decay and other defects, and chemical treatments available for arresting decay of poles in service.
Resource Type:: Technical Report
Full Text:: scientific community, and the general public. The Author Jeffrey Morrell Acknowledgment This work was

Creator:: Taylor, Adam M., Gartner, Barbara L., and Morrell, Jeffrey J.
Abstract:: Understanding how silvicultural treatments and changes in the forest resource will affect wood quality characteristics, including heartwood natural durability, is a critical need for forest managers. Because heartwood properties can be affected by environmental disturbances, including silvicultural practices used to grow trees faster, we need to know if increased growth...
Resource Type:: Article
Full Text:: silviculturist? Adam M. Taylor✳ Barbara L. Gartner✳ Jeffrey J. Morrell✳ Abstract Understanding how

Creator:: DeBell, Jeffrey D., Morrell, Jeffrey J., and Gartner, Barbara L.
Abstract:: The high decay resistance of western redcedar (Thuja plicata Donn) is due to the presence of toxic extractives, called tropolones, in the heartwood. Therefore, tropolone content may be used as an indicator of decay resistance. With increment core-sized samples of western redcedar heartwood, we used gas chromatography to measure tropolone...
Resource Type:: Article

Creator:: Silva, Antonio, Gartner, Barbara L., and Morrell, Jeffrey J.
Abstract:: While wood plastic composites have gained an increasingly large share of the market for decks and other outdoor structures, there are many questions about the long-term potential for biodeterioration of these materials. While the plastic does appear to retard moisture uptake, thereby slowing the rate of degradation, a number of...
Resource Type:: Preprint and Article
Full Text:: . Gartner, Professor Jeffrey J. Morrell, Professor Department of Wood Science & Engineering Oregon State

Creator:: Zahora, Andrew R. and Morrell, Jeffrey J.
Abstract:: High concentrations of the fumigant methylisothiocyanate (MITC) will effectively control decay fungi in large wood structures, but the fungitoxicity of low MITC concentrations and the influence of wood moisture content (MC) on its performance are not well understood. The MC of Douglas-fir heartwood greatly influenced the susceptibility of the decay...
Resource Type:: Article
Full Text:: 5 days. D) Infested wood blocks were exposed at 0.10 pg MITC/cc air. Two groups of wood blocks

Creator:: Prasad, T. R. Narayana, Humphrey, Philip E., and Morrell, Jeffrey J.
Abstract:: Preservative treatment of whole, wood-based composite products (mainly panels) has disadvantages; problems largely stem from swelling, strength loss, and incomplete or inappropriate penetration during treatment, and distortion during redrying. Pretreatment of comminuted wood prior to mat lay-up is one alternative, though the addition of chemicals may affect bonding during subsequent...
Resource Type:: Article
Full Text:: temperature and mois- ture content. J. Adhes. Sci. Technol. 3:397-4 13. -, AND D. ZAVALA. 1989. A technique

Creator:: Morrell, Jeffrey J., Sexton, Camille M., and Lebow, Stan
Abstract:: Mylone@ and tridipam are two solid chemicals that decompose to produce methylisothiocyanate (MIT), a highly effective wood fumigant. In this study, two techniques -- a rapid, test-tube method and small-scale, wood-block assay -- were used to determine the effect of the pH of various chemical buffers on the decomposition of...
Resource Type:: Article
Full Text:: colonized with Poria carbonica and treated with varying dosages of Mylone" (A, B) or tridipam (C, D). The

Creator:: Smith, Susan M., Demessie, E. Sahle, Morrell, Jeffrey J., Levien, Keith L., and Ng, Harry
Abstract:: Adverse effects on mechanical properties from using a supercritical fluid (SCF) to increase preservative penetration of refractory woods were evaluated by treating small ponderosa pine sapwood specimens with supercritical carbon dioxide at 64 combinations of temperatures (35 to 80 C), pressure (1,000 to 4,000 psig), and time (0.5 to 2...
Resource Type:: Article
Full Text:: according to ASTM D-143 (American Society for Testing and Materials 1983). All specimens were stressed

Creator:: Demessie, Endalkachew Sahle, Hassan, Ali, Levien, Keith L., Kumar, Satish, and Morrell, Jeffrey J.
Abstract:: The effect of supercritical fluid treatment on superficial gas permeability of Douglas-fir was investigated by using carbon dioxide either alone or amended with methanol. Permeability increased in a majority of samples, although nearly one-third of the specimens declined in permeability. Improvements in permeability appeared to be unrelated to variations in...
Resource Type:: Article
Full Text:: . FROMEKT, H. A. 1981. U. S. Patent43088200. Dec. 28, 1981. JOHNSTON, K. P., D. G. PECK, AND S. KIM. 1989

Creator:: Peralta, Perry N. and Morrell, Jeffrey J.
Abstract:: The effects of moisture content, flow direction, concentration, and temperature on the diffusion of chloropicrin in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) heartwood were investigated. Diffusion coefficients were strongly affected by wood moisture content. Coefficients for radial and tangential diffusion at the fiber-saturation point were twice as high as those at...
Resource Type:: Article
Full Text:: standards containing known concentra- tions of chloropicrin. The diffusion coefficient (D) of

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