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151 records – page 1 of 16.

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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Les alignements des machines de la scierie

https://library.fpinnovations.ca/en/permalink/fpipub41743
Author
Pleau, J.H.
Date
March 1996
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Pleau, J.H.
Date
March 1996
Material Type
Research report
Physical Description
73 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Saws
Sawing
Saw mills
Canada
Series Number
Publication spéciale SP522F
E-2915
Location
Sainte-Foy, Québec
Language
French
ISBN
0864885222
ISSN
08250030
Abstract
L'alignement précis des équipements de coupe est un moyen recommandé pour assurer la maximisation du rendement matière et de la qualité des produits manufacturés. Les tendances de l'industrie s'orientent de plus en plus vers l'utilisation de scies minces et vers une réduction maximale des dimensions-cibles. Il est essentiel pour la qualité des produits désirés que les préposés de l'entretien et de l'alignement des machines fassent un ajustement de haute précision. Le succès d'un alignement précis dépend en grande partie de la précision des outils utilisés pour accomplir ce travail. Un niveau de précision est calibré de façon telle à permettre de mesurer les déviations du nivelage par unité de millième de pouce. Ce livre propose des formules pratiques que l'expérience en milieu de travail peut mettre à profit. Les méthodes d'alignement s'appliquent à l'ensemble de la machinerie des centres de transformation: équarrisseuse-déchiqueteuse ("Chipper Canter"), scie de tête à ruban avec le chariot, scie de tête à rubans jumelés ("Twin Band"), refendeuse verticale, refendeuse à ruban horizontal, scie de tête circulaire avec le chariot et déligneuse à scies multiples ("Bull Edger").
Scieries
Machines
Alignements
Sawmills
Equipment Adjustments
Forintek Canada Corp. - Publications
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Amélioration de la qualité des copeaux produits en forêt, à l'aide du trieur optopneumatique Simco/Ramic

https://library.fpinnovations.ca/en/permalink/fpipub235
Author
Franklin, G.S.
Date
1996
Edition
36461
Material Type
Research report
Field
Fibre Supply
Author
Franklin, G.S.
Date
1996
Edition
36461
Material Type
Research report
Physical Description
11 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Residues
Quality control
Qualitative analysis
Analysis
Series Number
Rapport spécial ; RS-000113
Language
French
Abstract
Le trieur Pulpwood Sorter de Simco/Ramic a fait l'objet d'essais dans le but de déterminer s'il était capable d'extraire des copeaux sans écorce destinés à la pâte, à partir de copeaux produits en forêt et contenant des quantités connues d'écorce et d'autres débris. Les essais portaient sur quatre types de copeaux: des copeaux de feuillus provenant d'arbres entiers, des copeaux de résineaux provenant de troncs entiers, des copeaux de résineux provenant d'arbres entiers et des copeaux de feuillus produits par une ébrancheuse-écorceuse-déchiqueteuse à fléaux. Les résultats des essais donnent les proportions de copeaux acceptés et de résidus combustibles en pourcentage de l'approvisionnement total à l'entrée, et le rapport estime également le coût de triage par tonne métrique verte.
Copeaux de bois
COPEAUX A PATE
AMÉLIORATION DE LA QUALITÉ
TRIAGE DE COPEAUX PAR MÉTHODE OPTOPNEUMATIQUE
CONTENU EN ÉCORCE
RÉSIDUS COMBUSTIBLES
ANALYSE ÉCONOMIQUE
TRIEUR DE COPEAUX SIMCO/RAMIC
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Analyse de coût comparative de système de récolte et de transport intégrant bois ronds et biomasse forestière

https://library.fpinnovations.ca/en/permalink/fpipub4049
Author
Gingras, Jean-François
Favreau, Jean
Date
1996
Edition
40780
Material Type
Research report
Field
Fibre Supply
Author
Gingras, Jean-François
Favreau, Jean
Date
1996
Edition
40780
Material Type
Research report
Physical Description
18 p
Sector
Forest Operations
Field
Fibre Supply
Research Area
Transportation Infrastructure
Subject
Systems
Roads
Softwoods
Logging
Costs
Canada
Biomass
Analysis
Series Number
Rapport spécial ; RS-000111
Language
French
Abstract
Le présent rapport donne des estimations détaillées des coûts actuels, à destination, des bois ronds de qualité sciage et de qualité pâte, de même que des coûts de la biomasse forestière récoltée dans un système intégré à la récolte des bois ronds. Trois systèmes différents ont été étudiés: la récolte par arbres entiers jusqu'en bordure de route, la récolte par bois tronçonnés intégrés au déchiquetage d'arbres entiers, et la récolte par bois tronçonnés. Les études ont eu lieu dans deux types de sites représentatifs:un site résineux boréal et un site mélangé acadien. Les résultats sont présentés en $/m3 et en $/tmv (tonne métrique verte) pour les bois ronds ainsi que pour la biomasse et du taux d'utilisation des machines produisant la biomasse sont analysés. D'autres facteurs qui affectent la viabilité de la biomasse forestière comme source économique d'énergie font l'objet d'une discussion.
COUT DU BOIS
ANALYSE DE COUT
Étude comparative
Bois ronds
BIOMASSE FORESTIERE
SYSTEMES DE RÉCOLTE
SYSTEMES INTÉGRÉS
Récolte par arbres entiers
EN BORDURE DE ROUTE
Déchiquetage
Résineux
Peuplements mélangés
BIOÉNERGIE
Est du Canada
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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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Avancement des travaux et rapport final projet d'optimisation d'une raboteuse : annee 1995-96

https://library.fpinnovations.ca/en/permalink/fpipub4901
Author
Laganière, B.
Date
March 1996
Edition
41727
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Laganière, B.
Contributor
Quebec. Ministere des Forets
Date
March 1996
Edition
41727
Material Type
Research report
Physical Description
6 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Planing
Planers
Optimization
Series Number
E-2796
Location
Sainte-Foy, Québec
Language
French
Abstract
Planers - Optimization
Planing
Raboteuse - Optimisation
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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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151 records – page 1 of 16.