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71 records – page 1 of 8.

Accelerated aging and outdoor weathering of aspen waferboard

https://library.fpinnovations.ca/en/permalink/fpipub4743
Author
Alexopoulos, J.
Date
March 1991
Edition
41549
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Alexopoulos, J.
Date
March 1991
Edition
41549
Material Type
Research report
Physical Description
39 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Alberta
Manitoba
Saskatchewan
Waferboards
Utilization
Aspen
Aging
Series Number
Forestry Canada No. 1
E-1235
Location
Ottawa, Ontario
Language
English
Abstract
Waferboard
Aspen - Utilization
Waferboard - Aging
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Antigen production for diagnosis of sapstain and monitoring of biocontrol

https://library.fpinnovations.ca/en/permalink/fpipub4781
Author
Chan, M.K.H.
Mes-Hartree, M.
Date
March 1991
Edition
41594
Material Type
Research report
Field
Sustainable Construction
Author
Chan, M.K.H.
Mes-Hartree, M.
Date
March 1991
Edition
41594
Material Type
Research report
Physical Description
58 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Sapstain
Series Number
Forestry Canada No. 43
E-1527
Location
Ottawa, Ontario
Language
English
Abstract
We have developed an assay to distinguish sapstaining fungi from biocontrol or other fungi present in wood. This assay is based on monoclonal antibody technology. To develop the assay we chose Ophiostoma piceae as the sapstaining fungus and Gliocladium roseum as the biocontrol fungus. We obtained two monoclonal antibodies (Mab) from G. roseum that could be used to discriminate between staining and biocontrol fungi in competition studies. Mab 6A5 could specifically monitor G. roseum and closely related species while Mab 3F12 detected a variety of biocontrol fungi. We had numerous problems in developing a specific monoclonal antibody for O. piceae. We finally succeeded when the cell wall protein from o. piceae was used as an immunogen. One Mab was specific for cell wall protein but could not recognize the whole fungus. This Mab will be used in studies on the cell wall of O. piceae. We developed another Mab that was specific for O. piceae spores and this may be useful in product formulation activities. Three Mabs had high titre and were specific for O. piceae and O. ulmi but did not cross-react with the biocontrol fungi.
Sapstain Control
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Application de la vision artificielle dans les scieries europeennes : un rapport de voyage prepare pour le Conseil national de recherches du Canada (Mai 1988)

https://library.fpinnovations.ca/en/permalink/fpipub5636
Author
Middleton, G.R.
Munro, B.D.
Morin, M.
Date
January 1991
Edition
38128
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Middleton, G.R.
Munro, B.D.
Morin, M.
Date
January 1991
Edition
38128
Material Type
Research report
Physical Description
21 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Saw mills
Efficiency
Automatic control
Series Number
E-402
Location
Ottawa, Ontario
Language
French
Abstract
Sawmilling - Efficiency
Sawmills - Automation
Sawmills - Europe
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Application of ultrasonics and a slope of grain indicator to detection of compression wood in lumber

https://library.fpinnovations.ca/en/permalink/fpipub1086
Author
Hamm, E.A.
Lum, Conroy
Date
July 1991
Edition
37493
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hamm, E.A.
Lum, Conroy
Contributor
Science Council of British Columbia.
Date
July 1991
Edition
37493
Material Type
Research report
Physical Description
39 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Wood
Series Number
W-1574
Location
Vancouver, British Columbia
Language
English
Abstract
Western hemlock is a species that is highly susceptible to compression wood (CW) formation, an abnormal wood tissue that forms on the under side of leaning tree stems and branches. When lumber cut from logs containing CW is dried, the CW shrinks approximately 10 times normal in the parallel to grain direction, resulting in degrade, at times severe, due to warp in the form of crook and bow. In this project a technique using an ultrasonic materials evaluation system (UME) was tested for its ability to detect CW. Since stress wave velocity, in addition to being dependent on elastic properties and material density, is also a function of growth ring orientation, a slope of grain indicator was evaluated for its ability to measure growth ring orientation, to be used in conjuction with the UME.
Compression wood
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Aqueous phenolic dispersions for bonding wood composites

https://library.fpinnovations.ca/en/permalink/fpipub889
Author
Troughton, G.E.
Andersen, Axel W.
Walser, D.C.
Date
March 1991
Edition
37236
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Troughton, G.E.
Andersen, Axel W.
Walser, D.C.
Date
March 1991
Edition
37236
Material Type
Research report
Physical Description
49 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Phenols
Gluing
Glue
Series Number
Forestry Canada No. 36;1812L006
W-842
Location
Vancouver, British Columbia
Language
English
Abstract
A series of dispersion-resin plywood formulations were prepared in the laboratory and their bond performance assessed on incised spruce veneer at 10% m.c. Excellent bond quality results were achieved in these laboratory experiments as indicated by high average % wood failure values of over 90%. To further develop the plywood dispersion resin, a pilot plant trial at a gluing company was conducted and again excellent bond quality results were achieved. A large quantity of the plywood dispersion resin was prepared and a successful mill trial at Cantree Plywood was carried out. This trial demonstrated that more dimensionally stable panels can be prepared from high m.c. veneer. The waferboard dispersion technology developed in this study helped facilitate a mill trial using high moisture content face wafers.
Glue, Phenolic
Gluing - Influence of moisture content
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Bending modulus of elasticity and strength of 1.75" x 3.5" x 96" Douglas-fir microlam and spruce specimens

https://library.fpinnovations.ca/en/permalink/fpipub5495
Author
Palka, L.C.
Rovner, B.
Olson, L.
Wakeman, R.G.
Walser, D.C.
Date
March 1991
Edition
37257
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Palka, L.C.
Rovner, B.
Olson, L.
Wakeman, R.G.
Walser, D.C.
Date
March 1991
Edition
37257
Material Type
Research report
Physical Description
12 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Veneer
Mechanical properties
Laminate product
Series Number
Appendix 2 to Forestry Canada No. 35
Contract no. 1812L007
W-874
Location
Vancouver, British Columbia
Language
English
Abstract
The purpose of this small study was to examine the effect of various test methods upon the bending moduli of elasticity and to determine the bending strength of selected Douglas-fir and spruce laminated veneer lumber specimens.
Lumber, Laminated veneer - Strength
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Building codes & fire standards benefit study

https://library.fpinnovations.ca/en/permalink/fpipub2172
Contributor
Ross Thomson & Associates
Forintek Canada Corp.
Date
March 1991
Edition
38714
Material Type
Research report
Field
Sustainable Construction
Contributor
Ross Thomson & Associates
Forintek Canada Corp.
Date
March 1991
Edition
38714
Material Type
Research report
Physical Description
178 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Building code
Location
Ottawa, Ontario
Language
English
Abstract
Building codes
Documents
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Building codes & fire standards benefit study : "Delphi" questionaire

https://library.fpinnovations.ca/en/permalink/fpipub4869
Author
Thomson, C.R.
Date
May 1991
Edition
41689
Material Type
Research report
Field
Sustainable Construction
Author
Thomson, C.R.
Contributor
Ross Thomson & Associates
Date
May 1991
Edition
41689
Material Type
Research report
Physical Description
36 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Studs
Standards
Canada
Building code
Location
Ottawa, Ontario
Language
English
Abstract
Building codes - Canada
Fire Standards - Benefit Study
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Building materials in the context of sustainable development : an analytical framework

https://library.fpinnovations.ca/en/permalink/fpipub42903
Author
Trusty, W.B.
Date
December 1991
Material Type
Research report
Field
Sustainable Construction
Author
Trusty, W.B.
Contributor
Forintek Canada Corp.
Date
December 1991
Material Type
Research report
Physical Description
21 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Building Systems
Subject
Renewable natural resources
Quality control
Qualitative analysis
Materials
Building construction
Series Number
W-2978
Location
Vancouver, British Columbia
Language
English
Abstract
This report describes an analytical framework developed to assess the relative advantages and disadvantages of different building materials from an environmental perspective. The ultimate objective is to develop and make available a systems model which will allow building designers to assess the environmental impacts of using different kinds of building materials in structural applications. When completely operational the model will deal with critical impacts on the physical environment, measured in natural units (e.g. gigajoules of embodied energy or kilograms of atmospheric emissions) in a holistic, cradle-to-grave framework. The model will be applicable to light commercial/institutional structures as well as single family and low-rise residential construction. The purpose here is to report on our work to date, with emphasis on the framework and its application, and to facilitate an exchange of information with others who are taking parallel courses and grappling with similar problems. The report also includes some interim results for wood and steel building materials which demonstrate how the model can be used. We start with a discussion of the concept of sustainable development because that concept is central to our approach. Subsequent sections of this report then detail the analytical framework and provide examples of the results we're obtaining.
Building construction - Materials used
Environmental quality
Renewable natural resources
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Characterization of antibiotics produced by potential biological control agents of sapstain in lumber

https://library.fpinnovations.ca/en/permalink/fpipub4789
Author
Sutcliffe, Roger
Miller, D.
Date
March 1991
Edition
41602
Material Type
Research report
Field
Sustainable Construction
Author
Sutcliffe, Roger
Miller, D.
Date
March 1991
Edition
41602
Material Type
Research report
Physical Description
86 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Sapstain
Series Number
Forestry Canada No. 44
E-1578
Location
Ottawa, Ontario
Language
English
Abstract
Literature searches were made with respect to the metabolites produced by species under consideration as biological control agents and other species of the same genera. Literature analytical methods were selected and developed to profile the organic solvent extracts of the selected fungi grown in standard media and to screen for specific metabolites by thin layer chromatography - mass spectrometry. From these screenings attempts were made to characterize specific components. Important classes of metabolites that might be expected to be produced by the candidateorganisms were identified from consideration of species believed to be related genetically through morphology and isozyme analysis. These include trichothecene-, cyclopentenylisocyanide-, and gliotoxin-type secondary metabolites and the peptaibol polypeptides. Screening of the candidate species demonstrated that these produce many metabolites, the profiles of which depend on the substrate on which they are grown. Few metabolites are readily identifiable on the basis of mass spectral data or retention indices alone. The Trichoderma strains were shown to produce dehydroacetic acid, a known antifungal agent, in defined media. T. viride EL3 was also shown to produce this metabolite on jack pine sapwood. All the Gliocladium strains of interest were shown to produce the Aib marker indicating the production of peptaibol antibiotics (mycotoxins). This is the first report of this type of metabolite for Gliocladium solani. For Gliocladium viride EL8 the production of 3,6-dibenzylpiperazine-2,5-dione was demonstrated. This indicates that this strain may have the potential to biosynthesize gliotoxin or related metabolites depending on culture conditions. The similarity between some of the metabolites reported to be produced by the genera under consideration as biocontrol agents and those reported to be produced by staining fungi may have implications with respect to the mechanisms of biocontrol.
Biological Control
Lumber - Sapstain Control
Antibiotics
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71 records – page 1 of 8.