Experiments were conducted to determine both the influence of wood
moisture content on the fungitoxicity of methylisothiocyanate (MIT) to the
wood-decay fungus Poria carbonica, and the ability of gelatin to safely en-capsulate MIT for efficient treatment of wood products.
The fungitoxicity of MIT was studied by determining the product of...
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...
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...
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...
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...
Continuing education workshops and shortcourses are playing an increasingly important role in the education of forest resource professionals. The “tug-of-war” between breadth and depth in undergraduate curricula, combined with pressure to reduce the number of credit hours required for graduation, create knowledge gaps in various disciplines. Workshops and shortcourses help...
Full Text:
(An Update)
Brian Roy Lockhart1, Andrew W. Ezell2, and John D. Hodges2
1Research Forester
U.S
Continuing education workshops and shortcourses are playing an increasingly important role in the education of forest resource professionals. The “tug-of-war” between breadth and depth in undergraduate curricula, combined with pressure to reduce the number of credit hours required for graduation, create knowledge gaps in various disciplines. Workshops and shortcourses help...
Full Text:
AND SHORTCOURSES (AN UPDATE)
Brian Roy Lockhart
USDA Forest Service Southern Research Station, Center
Previous field-scale experimental data and numerical modeling suggest that the dual-domain mass transfer (DDMT) of electrolytic tracers has an observable geoelectrical signature. Here we present controlled laboratory experiments confirming the electrical signature of DDMT and demonstrate the use of time-lapse electrical measurements in conjunction with concentration measurements to estimate the...
Most of the forces in academia work to develop highly specialized individuals. Training comes primarily from a single person, the dissertation advisor. Detailed field study of various forest types or physiographic provinces is often limited to where we trained and where we work (sometime both are in the same location...