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Filtering by: Creator Jeffrey J. Morrell Remove constraint Creator: Jeffrey J. Morrell Decade 1990-1999 Remove constraint Decade: 1990-1999

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  • Decomposition of metham sodium to methylisothiocyanate as affected by wood species, temperature, and moisture content

    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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    AFFECTED BY WOOD SPECIES, TEMPERATURE, AND MOISTURE CONTENT1 Jefrey J. Morrell Assistant Professor

  • Production of fungal protoplasts from selected wood-degrading fungi

    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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    -DEGRADING FUNGI Chen Rui Graduate Research Assistant and Jeflrey J. Morrell Assistant Professor

  • Assessing Biocide Effects on Protoplasts of Wood Decay Fungi

    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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    Corvallis, OR 9733 1 and Jefrey J. Morrell Assistant Professor Department of Forest Products Oregon

  • Fungal associates of Buprestis aurulenta in western Oregon

    Creator:
    Garcia, Carlos M. and Morrell, Jeffrey J.
    Abstract:
    Associations between the golden metallic beetle, Buprestis aurulenta L., and wood-destroying fungi were explored with adult beetles collected from log decks. A variety of fungi were isolated from the beetle bodies by four methods. A total of 863 isolations were made from 59 females and 21 males. There was no...
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    Carlos M. Garcia and J.J. Morrell Abstract: Associations between the golden metallic beetle,Buprestis

  • Relationship between incipient decay, strength, and chemical composition of Douglas-fir heartwood

    Creator:
    Winandy, Jerrold E. and Morrell, Jeffrey J.
    Abstract:
    A new laboratory technique to simulate the initiation of wood decay and to assess the effects of incipient decay on material properties is described. Douglas-fir heartwood specimens were exposed to brown-rot (Postia placenta and Gloeophyllum trabeum) fungi for various periods. Bendlng properties were determined by nondestructive and destructive tests, and...
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    Forest Prcducts Laboratory One Gifford Pinchot Drive Madison, WI 53705-2398 and Jeffrey J. Morrell

  • Steady-state diffusion of chloropicrin in Douglas-fir heartwood

    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...
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    Clemson, SC 29634 and Jefrey J. Morrell Associate Professor Department of Forest Products Oregon

  • Interactions between sodium N-methyldithiocarbamate and Douglas-fir heartwood

    Creator:
    Miller, D. B. and Morrell, Jeffrey J.
    Abstract:
    Vapam(r) (NaMDC) is the fumigant most commonly used to arrest and control decay of utility poles. While volatile fungitoxins are detectable only 1 to 2 years after treatment, poles treated with Vapam(r) remain free of decay fungi for 6 to 17 years. Vapam(r) decomposes to produce volatile fungicides as well...
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    DOUGLAS-FIR HEARTWOOD' D. B. Miller and .I. J. Morrell Research Associate and Assistant Professor

  • Interactions of ammoniacal copper zinc arsenate (ACZA) with Douglas-fir

    Creator:
    Lebow, Stan T. and Morrell, Jeffrey J.
    Abstract:
    Tests were conducted to determine the effect of ACZA composition on fixation and the roles of adsorption and precipitation in fixation. The sites of copper and zinc adsorption within the treated wood and the bonding environment of adsorbed copper were also examined. The results generally support the finding that arsenic...
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    University Corvallis, OR 9733 1 and Jeflrey J. Morrell Assistant Professor Department of Forest

  • Methylisothiocyanate fumigant content of Douglas-fir heartwood at various moisture levels after treatment with solid sodium N-methyldithiocarbamate

    Creator:
    Lebow, Stan T. and Morrell, Jeffrey J.
    Abstract:
    The relationship between moisture content and the presence of methylisothiocyanate (MITC) in wood following various applications of sodium n-methyldithiocarbamate (NaMDC) was investigated with small Douglas-fir heartwood blocks. While MITC levels were initially higher in wetter blocks, MITC levels in drier blocks remained more stable over the 8-week test period. The...
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    . Lebow Senior Research Assistant and J. J. Morrell Assistant Professor Department of Forest

  • Fungal staining of ponderosa pine sapwood: Effects of wood preconditioning and bioprotectants

    Creator:
    Morrell, Jeffrey J. and Sexton, Camille M.
    Abstract:
    Differences in stain susceptibility were evaluated on sterile and unsterile samples of freshly sawn, frozen and thawed, or oven-dried and rewetted ponderosa pine sapwood. Samples treated with sterile medium or with medium inoculated with either Pseudomonas putida or Bacillus subtilis were inoculated with selected wood-staining fungi. In general, fresh unsterile...
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    PRECONDITIONING AND BIOPROTECTANTS Jefrey J. Morrell Assistant Professor and C:amille M. Sexton Senior