Index Catalog // ScholarsArchive@OSU

Bioassaying wood preservatives with Aspergillus niger

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...
Resource Type:: Article
Full Text:: JeHrey J. Morrell Assistant Professor Department of Forest Products, College of Forestry Oregon State

Fungi colonizing redwood in cooling towers: Identities and effects on wood properties

Creator:: Morrell, Jeffrey J. and Smith, Susan M.
Abstract:: Heartwood from coastal redwood [Sequoia sempervirens (D. Don.) Endl.] is very durable and is often used untreated in harsh environments, such as cooling towers of power or chemical processing plants. Wood in this environment is often attacked by soft rot fungi. Some wood users attempt to bolster protection by including...
Resource Type:: Article
Full Text:: EFFECTS ON WOOD PROPERTIES1 Jefrey J. Morrell and Susan M. Smith Assistant Professor and Research

The influence of wood moisture content on the fungitoxicity of methylisothiocyanate in Douglas-fir heartwood

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:: Jefrey J. Morrell Assistant Professor of Wood Preservation Department of Forest Products College of

Laboratory decay resistance of preservative-treated red alder

Creator:: Mitchoff, M. E. and Morrell, Jeffrey J.
Abstract:: Alder represents an abundant but underutilized resource that has little natural resistance to decay. Treated alder might be used for stakes, posts, or other nonstructural applications. The performance of alder treated with chromated copper arsenate (CCA), copper 8 quinolinolate, zinc naphthenate (ZN), or thiocyanomethylthiobenzothiazole (TCMTB) was assessed in soil block...
Resource Type:: Article
Full Text:: ALDER' M. E. Mitchof and J. J. Morrell Undergraduate Student and Assistant Professor Department of

Evaluating potential decay control agents with a small block test

Creator:: Corden, Malcolm E. and Morrell, Jeffrey J.
Abstract:: A small-scale test was developed to evaluate the ability of fungicides to control decay fungi established in wood. The test, which uses blocks 2.5 x 2.5 x 10 cm, tests the ability of a chemical to migrate from the middle of the block to control a previously established decay fungus,...
Resource Type:: Article
Full Text:: BLOCK TEST1 Professor Emeritus Department of Botany and Plant Pathology and J. J. Morrell

Diffusion and sorption of the fumigant methylisothiocyanate in Douglas-fir wood

Creator:: Zahora, Andrew R. and Morrell, Jeffrey J.
Abstract:: The influence of moisture content (MC) and conventional preservative treatment on methylisothiocyanate (MIT) sorption and diffusion were investigated in Douglas-fir wood. In wood at 0% MC, the ratio of equilibrium MIT adsorption to desorption concentrations was low (0.2), but it increased rapidly to about 0.94 above 18% MC. Partition coefficients...
Resource Type:: Article
Full Text:: SCIENCE, JANUARY 1989, V. 21(1) HELSING, G. G., J. MORRELL, AND R. D. GRAHAM. 1984. Evaluation of

A Note on the Sensitivity of A Closed-Tube Bioassay To Volatile Methylisothiocyanate Residues In Fumigant-Treated Wood

Creator:: Zahora, Andrew R. and Morrell, Jeffrey J.
Abstract:: A closed-tube bioassay with Poria placenta was used to measure residual fungistatic vapors in wood fumigated with methylisothiocyanate (MIT). This bioassay showed an inverse linear relationship between fungal growth and the amount of MIT in the wood samples. For fumigated increment-core sections of unseasoned Douglas-fir heartwood (4.8 mm in diameter...
Resource Type:: Article
Full Text:: . Holzforschung 27:168-173. HELSING, G. G.. J. MORRELL, AND R. D. GRAHAM. 1984. Evaluation of fumigants for

The effect of pH on decomposition of Mylone (dazomet) and tridipam to fungitoxic methylisothiocyanate in wood

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:: TRIDIPAM TO FUNGITOXIC METHYLISOTHIOCYANATE IN WOOD1 J. J. Morrell, C. M. Sexton, and S. Lebow

Conserving energy by environmentally acceptable practices in maintaining and procuring transmission poles for long service ; August 1988

Creator:: Morrell, Jeffrey J. and Corden, M. E. (Malcolm E.)
Abstract:: The eighth annual report details continued progress on each of the five objectives. In this year's report, Objectives II and III from previous reports have been combined to reflect the similarity of each effort. Improved fumigants: The previously established field trials continue to demonstrate the superior performance of both chioropicrin...
Resource Type:: Technical Report

Controlling sapstain : trials of product group I on selected western softwoods

Creator:: Miller, Donald J. (Donald James), Morrell, Jeffrey J., and Oregon State University. Forest Research Laboratory
Abstract:: Environmental restrictions have induced many sawmills to seek alternatives to pentachlorophenol (penta) or similar chlorinated phenols to control fungal sapstains on green lumber. Five alternative preventives were evaluated against a traditional penta product (Permatox 101) on Douglas-fir, hem-fir, and pine lumber in an accelerated 6-week test on small specimens in...
Resource Type:: Technical Report
Full Text:: : Trials of Product Group I on Selected Western Softwoods Donald J. Miller Jeffrey J. Morrell lii FORUF

ScholarsArchive@OSU

Bioassaying wood preservatives with Aspergillus niger

Fungi colonizing redwood in cooling towers: Identities and effects on wood properties

The influence of wood moisture content on the fungitoxicity of methylisothiocyanate in Douglas-fir heartwood

Laboratory decay resistance of preservative-treated red alder

Evaluating potential decay control agents with a small block test

Diffusion and sorption of the fumigant methylisothiocyanate in Douglas-fir wood

A Note on the Sensitivity of A Closed-Tube Bioassay To Volatile Methylisothiocyanate Residues In Fumigant-Treated Wood

The effect of pH on decomposition of Mylone (dazomet) and tridipam to fungitoxic methylisothiocyanate in wood

Conserving energy by environmentally acceptable practices in maintaining and procuring transmission poles for long service ; August 1988

Controlling sapstain : trials of product group I on selected western softwoods

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