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117 records – page 1 of 12.

The ability of bacteria to induce brownstain in western hemlock

https://library.fpinnovations.ca/en/permalink/fpipub5877
Author
Kreber, B.
Hedberg, B.
Date
March 1996
Edition
41145
Material Type
Research report
Field
Sustainable Construction
Author
Kreber, B.
Hedberg, B.
Contributor
Canada. Canadian Forest Service.
Date
March 1996
Edition
41145
Material Type
Research report
Physical Description
7 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Tsuga Heterophylla
Tsuga
Stain
Bacteria
Series Number
Canadian Forest Service No. 32 1/2
Contract no. 1715K024
W-1322
Location
Vancouver, British Columbia
Language
English
Abstract
Three Gram negative bacteria isolated from brownstained western hemlock were investigated for their capacity to produce hemlock brownstain. Brownstain was observed when infecting western hemlock with two bacteria. Oxygen was strongly indicated as being indespensable for the development of brownstain in infected samples. However, pH did not seem to influence the production of this stain.
Tsuga heterophylla - Stains, Chemical
Stains - Chemical
Degradation, Bacterial
Bacteria
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Advancement in osb manufacturing technology

https://library.fpinnovations.ca/en/permalink/fpipub5677
Author
Hsu, W.H.E.
Kirincic, S.
Date
January 1996
Edition
38830
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hsu, W.H.E.
Kirincic, S.
Date
January 1996
Edition
38830
Material Type
Research report
Physical Description
8 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Thickness
Strands
Resin
Oriented strandboard
Location
Ottawa, Ontario
Language
English
Abstract
Oriented strandboard (OSB) manufacturing technology has been advancing steadily during the past few years. Today, the industry can produce higher quality OSB at lower costs than ever before in the product's history. Research results have shown that drying costs can be reduced and strand quality can be improved through proper wood yard management, and that the production efficiency can be improved through various ways of optimizing the pressing and processing operations. OSB quality has been improved and board density has been reduced by using long and thin strands in panel face layers and relatively short and thick strands in the panel core. The press times have been reduced by using higher press temperatures and higher mat face-layer moisture contents. The degree of strand alignment has been improved by controlling the falling distance from the alignment heads to the top of mat being formed. Strands alignment has been further enhanced by arranging the alignment disc gaps in such a way so that narrower strands can be aligned through narrower gaps and directed towards core while wider strands can be aligned through wider gaps and directed towards the panel surfaces. Based on these technical advancements, OSB can be produced faster and at a lower density without sacrificing quality. Consequently, the OSB industry is in the position to improve panel quality without resorting to costly options such as increasing resin content and press time.
OSB
Advancement
Strand Thickness
Strand Width
Strand Length
Resin Content
Press Temperature
Moisture
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Analysis of borate-treated L-joints after five years exposure and inspection after six years

https://library.fpinnovations.ca/en/permalink/fpipub4367
Author
Morris, Paul I.
Ingram, Janet K.
Date
July 1996
Edition
41141
Material Type
Research report
Field
Sustainable Construction
Author
Morris, Paul I.
Ingram, Janet K.
Date
July 1996
Edition
41141
Material Type
Research report
Physical Description
20 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Preservatives boron
Preservatives
Series Number
1710C487
W-1313
Location
Vancouver, British Columbia
Language
English
Abstract
As a result of its potential as an added-value, environmentally acceptable, high performance wood product, borate-treated lumber has attracted the interest of the Canadian forest products industry (Byrne 1990). One of the potential markets for borate-treated wood in Europe and North America is millwork. Currently millwork manufacturers use light organic solvent preservatives to provide durability to their products but there are a number of reasons why this situation may change in the near future. There are increasing pressures on uncontrolled emission of volatile organic solvents from treated wood and public concerns regarding some of the active ingredients now in use (Orsler and Holland 1993). The use of borate-treated wood eliminates both of these problems and may provide some additional advantages by eliminating batch processing in the manufacture of joinery. The one factor which is likely to have the greatest impact on the performance of borate-treated millwork is the mobility of the boron. Borate-treated wood is currently approved for use in exterior exposure in New Zealand provided it has a three-coat paint finish. Nevertheless there is concern outside New Zealand that redistribution of boron within the treated wood could lead to localized depletion and decay. An L-joint test of borate-treated wood was set up by Forintek to determine whether preservative depletion and subsequent decay is likely to be a problem. This report describes the performance results of this trial after six years and compares borate content of the L-joints initially and after five years exposure.
Preservatives - Boron
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The Bräcke B290 patch scarifier. Part 1: control of microsite quality

https://library.fpinnovations.ca/en/permalink/fpipub392
Author
Cormier, Denis
Date
May 1996
Edition
36627
Material Type
Research report
Field
Fibre Supply
Author
Cormier, Denis
Date
May 1996
Edition
36627
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Sites
Site preparation
Scarifying equipment
Scarification
Quality control
Qualitative analysis
Productivity
Preparation
Series Number
Field Note ; Silviculture-FN-000089
Language
English
Abstract
Site preparation
Mechanical method
Scarifying equipment
Patch scarifiers
MICROSITE QUALITY
Evaluation
Productivity
Ontario
BRÄCKE B290 PATCH SCARIFIER
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The Bräcke B290 patch scarifier. Part 2: comparison with the conventional two-row Bräcke

https://library.fpinnovations.ca/en/permalink/fpipub394
Author
Cormier, Denis
Date
May 1996
Edition
36629
Material Type
Research report
Field
Fibre Supply
Author
Cormier, Denis
Date
May 1996
Edition
36629
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Trees
Systems
Sites
Site preparation
Scarifying equipment
Scarification
Productivity
Preparation
Series Number
Field Note ; Silviculture-FN-000090
Language
English
Abstract
Site preparation
Mechanical method
Scarifying equipment
Patch scarifiers
Full-tree systems
Cut-to-length systems
Productivity
Comparison
Ontario
BRÄCKE TWO-ROW SCARIFIER
BRÄCKE B290 PATCH SCARIFIER
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Causes of hemlock brownstain : final summary report

https://library.fpinnovations.ca/en/permalink/fpipub4377
Author
Byrne, Anthony (Tony)
Kreber, B.
Date
July 1996
Edition
41152
Material Type
Research report
Field
Sustainable Construction
Author
Byrne, Anthony (Tony)
Kreber, B.
Contributor
Canada. Canadian Forest Service.
Date
July 1996
Edition
41152
Material Type
Research report
Physical Description
6 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Wood
Tsuga Heterophylla
Tsuga
Stain fungal
Stain
Growth
Balsam
Fir
Series Number
Canadian Forest Service No. 32
W-1379
Location
Vancouver, British Columbia
Language
English
Abstract
Discolourations of hem-fir, usually called hemlock brownstain, have become an economically important problem with the move towards increased kiln-drying of the wood species mixture and added-value products in which discolourations cannot be tolerated. These discolourations, clearly different from sapstain, can occur in several types and intensities and are a serious problem in high-value markets. Because little is known about their causes means for their control are still unavailable. Therefore fundamental research was initiated to elucidate the biology and chemistry of hemlock brownstain and to suggest control measures. A post graduate student was hired to undertake laboratory and field work as part of a Ph.D. program. The thesis subject was "the role of microorganisms in the phenomenon of hemlock brownstain". The thesis covers: a literature review; laboratory work to locate the stain and define its nature; a storage study of logs and lumber to monitor progress in development of brownstain; fungal isolation work and sap characterization studies; in vitro production of hemlock brownstain in wood and sap; and additional laboratory experiments to determine what factors influence the formation of the brownstain. In addition to the thesis research the role of bacteria in the formation of the stain was investigated in the laboratory and the ability of various chemicals, including fumigants, to prevent the stain was tested in small-scale field test. This report provides an overview of the findings and provides recommendations for future work. The experiments clearly demonstrated that a non-specific microflora can produce brownstain which led to the hypothesis that microorganisms could be involved in hemlock brownstain. Based on our knowledge of the coastal sawmilling industry a strategy of minimizing fungal infection and rapid handling of the tree breakdown into final wood products could probably be the best approach to help reduce the problem. In terms of future work we recommend that work to understand the mechanism of DDAC in mitigation of the browning take precedence in future work on hemlock brownstain.
Abies amabilis - Stains - Fungal
Tsuga heterophylla - Stains - Fungal
Fungi - Growth
Fungi - Wood staining
Stains - Fungal
Hem-Fir - Stains - Fungal
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Chain chokers for small scale operations

https://library.fpinnovations.ca/en/permalink/fpipub377
Author
Ewing, Roderick H.
Date
January 1996
Edition
36611
Material Type
Research report
Field
Fibre Supply
Author
Ewing, Roderick H.
Date
January 1996
Edition
36611
Material Type
Research report
Physical Description
11 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Winches
Wear
Treatment
Tensile strength
Tensile
Mechanical properties
Steel
Small scale
Skidding
Shock
Quenching
Operations
Loads
Heat
Alloy
Series Number
Technical Note ; TN-000237
Language
English
Abstract
With the appropriate mainline attachment, chain chokers are a viable alternative to conventional wire rope chokers, particularly for small-scale operations. This report provides users of tractor-mounted winches and cable skidders with technical information on chain chokers. The report covers type of steels, chain specifications and grades, and how to inspect chains for wear elongation. The various components (e.g. sliding hooks, rings) used to assemble chain chokers are also discussed.
CHAIN CHOKERS
Steel
ALLOYS
WORKING LOAD
BREAKING STRENGTH
TENSILE STRENGTH
Wear
STATIC LOAD
SHOCK LOAD
Heat treatment
QUENCHING
TEMPERING
Winching
Skidding
Small-scale operations
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Codes & standards of composite wood panels in the world trade

https://library.fpinnovations.ca/en/permalink/fpipub4962
Author
Hsu, J.
Date
December 1996
Edition
41792
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Hsu, J.
Date
December 1996
Edition
41792
Material Type
Research report
Physical Description
15 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Waferboards
Standards
Particle boards
Oriented strandboard
MDF
Location
Sainte-Foy, Québec
Language
English
Abstract
This report compares international standards for particleboard, waferboard, OSB, MDF, hardboard as well as cement bonded wood composite panels. Property requirements are discussed and comparisons are made between countries. Formaldehyde emission regulations were surveyed in eighteen countries.
Particleboard - Waferboard - OSB - MDF - Hardboard - Cement Bonded
Codes & Standards
World Trade
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Commercial thinning a coastal second-growth forest with a Timberjack cut-to-length system

https://library.fpinnovations.ca/en/permalink/fpipub188
Author
Hunt, James A.
Date
January 1996
Edition
36613
Material Type
Research report
Field
Fibre Supply
Author
Hunt, James A.
Date
January 1996
Edition
36613
Material Type
Research report
Physical Description
14 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Timberjack
Thinning
Systems
Soil disturbance
Soil
Softwoods
Second growth forests
Second growth
Productivity
Sample
Harvesting
Harvesters
Growth
British Columbia
Series Number
Technical Note ; TN-000235
Language
English
Abstract
Pacific Forest Products Limited began commercially thinning Douglas-fir dominated second-growth forest on southeastern Vancouver Island with mechanized shortwood systems in 1992. In the summer of 1994, FERIC monitored a thinning operation near Cowichan Lake to determine productivities, costs and impacts to sites and residual stands. The thinning treatment was carried out with a Timberjack 1270 harvester and a Timberjack 910 forwarder.
Commercial thinning
Softwoods
DOUGLAS-FIR
Second-growth forests
Harvesting
Cut-to-length systems
SOIL DISTURBANCE
Machine evaluation
Productivity
FMG TIMBERJACK 1270 SINGLE-GRIP HARVESTER
FMG TIMBERJACK 910 FORWARDER
Coastal British Columbia
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Commercial thinning survey: Western Canada

https://library.fpinnovations.ca/en/permalink/fpipub36646
Author
Sambo, Stephanie
Clark, Marv
Date
1996
Material Type
Research report
Field
Fibre Supply
Author
Sambo, Stephanie
Clark, Marv
Date
1996
Material Type
Research report
Physical Description
2 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Thinning
Surveys
Canada
British Columbia
Alberta
Series Number
Field Note ; Partial Cutting-FN-000010
Language
English
Abstract
Commercial thinning
Surveys
Western Canada
Alberta
British Columbia
Documents
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117 records – page 1 of 12.