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You searched for: Journal name European Journal of Wood and Wood Products Remove constraint Journal name: European Journal of Wood and Wood Products Publication year rev 7989-2011 Remove constraint Publication year rev: 7989-2011 Source 2011 v.69 no.4 Remove constraint Source: 2011 v.69 no.4
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1. Artificial ageing of softwood joints and its effect on internal bond strength with special consideration of flat-to-end grain joints

Author:
Jürgen Follrich; Alfred Teischinger; Ulrich Müller
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 597-604
ISSN:
0018-3768
Subject:
Picea abies; adhesion; adhesives; cyanates; emulsions; formaldehyde; melamine; phenol; polyurethanes; relative humidity; resorcinol; softwood; urea; wood bonding
Abstract:
... The effect of ageing processes on internal bond strength of three-part specimens produced from Norway spruce wood (Picea abies Karst.) bonded with one-component polyurethane (PUR), two-component emulsion polymer isocyanate (EPI), melamine-urea-formaldehyde (MUF) or phenol-resorcinol-formaldehyde (PRF) adhesive was studied. By varying the grain angle of the middle part from 0° (parallel to grain of ...
DOI:
10.1007/s00107-010-0511-1

2. Assessment of glued timber integrity by limited-angle microfocus X-ray computed tomography

Author:
Sergio J. Sanabria; Peter Wyss; Juerg Neuenschwander; Peter Niemz; Urs Sennhauser
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 605-617
ISSN:
0018-3768
Subject:
X-radiation; adhesives; air; tomography; topology; wood; wood anatomy; wood bonding; wood quality
Abstract:
... Glued timber products have an extensive range of applications in construction. In this work a Microfocus X-ray Computed Tomography method was developed to inspect gluing defects in timber samples and was applied successfully on experimental data. The bonding plane was segmented into glued and non-glued regions and imaged with 5 mm resolution. Moreover, the gap topology between timber lamellas was ...
DOI:
10.1007/s00107-010-0509-8

3. Bending and fatigue strength of mortise and tenon furniture joints made from oil palm lumber

Author:
Jegatheswaran Ratnasingam; Florin Ioras
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 677-679
ISSN:
0018-3768
Subject:
bending strength; fatigue strength; furniture; lumber
Abstract:
... The bending and fatigue strengths of rectangular mortise and tenon furniture joints made from oil palm lumber and solid Rubberwood were compared. The results showed that the ultimate bending moment of the oil palm lumber joints were half of the strength value of Rubberwood joints. The results showed that for both materials the allowable design stresses for rectangular mortise and tenon joints coul ...
DOI:
10.1007/s00107-010-0501-3

4. Bending properties of compressed wood impregnated with phenolic resin through drilled holes

Author:
Satoshi Fukuta; Atsushi Watanabe; Yuichi Akahori; Akira Makita; Yuji Imamura; Yasutoshi Sasaki
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 633-639
ISSN:
0018-3768
Subject:
deformation; drilling; resins; polymerization; bending strength; Cryptomeria japonica; compressed wood; presses; dyes; heartwood; permeability; phenolic compounds
Abstract:
... The effect of drilling on the permeability of Japanese cedar and the bending properties of resin treated compressed wood were examined. Compressed wood was manufactured by impregnating aqueous phenolic resin solutions into the heartwood through drilled holes and polymerizing the impregnated resins using a hot press to maintain the deformation. The compressive deformation was carried out at 150°C f ...
DOI:
10.1007/s00107-010-0506-y

5. Biological damage function models for durability assessments of wood and wood-based products in building envelopes

Author:
Mostafa Nofal; Kumar Kumaran
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 619-631
ISSN:
0018-3768
Subject:
simulation models; computers; construction materials; equations; decayed wood; durability; building construction; air; microbial growth; wood physical properties; walls; heat treatment; molds (fungi)
Abstract:
... A durability assessment system that links an advanced computer model for structural and hygrothermal analysis with damage functions is currently being developed. The computational system has different modules that calculate the different structural and hygrothermal responses of wall systems. Outputs of these modules are input to the module of damage function models to calculate damage, performance ...
DOI:
10.1007/s00107-010-0508-9

6. Characterization of radial bending properties of cork

Author:
Ofélia Anjos; Helena Pereira; Maria Emília Rosa
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 557-563
ISSN:
0018-3768
Subject:
bending strength; cork; density; modulus of elasticity; porosity; tensile strength
Abstract:
... The behaviour of cork under three point bending stress in the radial direction was evaluated in relation to porosity (range 2.0–15.4%) and density (range 0.160–0.220 g cm−3). The study was made using water-boiled cork planks of two commercial quality classes (good and poor quality) collected at an industrial mill. Cork samples were cut with the largest dimension in two directions, axial and tangen ...
DOI:
10.1007/s00107-010-0516-9

7. Effect of sea water on water absorption and flexural properties of wood-polypropylene composites

Author:
Saeed Kazemi Najafi; Hamed Younesi Kordkheili
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 553-556
ISSN:
0018-3768
Subject:
absorption; composite wood products; mechanical properties; physical properties; polypropylenes; seawater; wood properties; Caspian Sea; Persian Gulf
Abstract:
... The effects of Caspian Sea and Persian Gulf waters on the physical and mechanical properties of wood- polypropylene composites were studied. For physical tests, the composites were immersed in Caspian Sea, Persian Gulf and distilled water and long term water absorption was determined. For mechanical tests, the prepared composites were immersed in Caspian Sea, Persian Gulf and distilled water for 7 ...
DOI:
10.1007/s00107-010-0518-7

8. Effect of thermal rectification on machinability of Eucalyptus grandis and Pinus caribaea var. hondurensis woods

Author:
Luiz Fernando de Moura; José Otávio Brito; Adriana Maria Nolasco; Lis Rodrigues Uliana
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 641-648
ISSN:
0018-3768
Subject:
Eucalyptus grandis; Pinus caribaea; color; dimensional stability; fungi; heat treatment; oxygen; planing; rakes; roughness; surface roughness; temperature; texture; tropical wood; weathering; wettability; wood properties
Abstract:
... Thermally rectified wood acquires colors similar to those observed in tropical woods, improved resistance to fungi and weathering, higher dimensional stability and lower hygroscopicity. Little information is available on the effect of heat treatments on the machining properties of wood. In this work, relatively low-valued woods (Eucalyptus grandis and Pinus caribaea var. hondurensis) underwent a v ...
DOI:
10.1007/s00107-010-0507-x

9. Novel use of biomass derived alkyl-xylosides in wetting agent for paper impregnation suitable for the wood-based industry

Author:
E. Papadopoulou; A. Hatjiissaak; B. Estrine; S. Marinkovic
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 579-585
ISSN:
0018-3768
Subject:
additives; biomass; emissions; industry; medium density fiberboards; paper; papermaking; particleboards; petrochemicals; petroleum; resins; surfactants; volatile organic compounds
Abstract:
... Today, papers impregnated with thermosetting resins like urea-formaldehyde and/or melamine-formaldehyde are broadly used as covers for wood-based panels like particleboards (PB) and medium density fibreboards (MDF), because they offer flexibility in surface decoration, mechanical endorsement and protection from emissions of Volatile Organic Compounds (VOCs) of the panel. The resin is enhanced with ...
DOI:
10.1007/s00107-010-0513-z

10. On the responsiveness of hardened UF-resins of different molar ratio towards ammonia fumigation

Author:
E. Roffael
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 675-676
ISSN:
0018-3768
Subject:
ammonia; crosslinking; curing (nonfood products); formaldehyde; fumigation; hardness; nitrogen content; resins
Abstract:
... Fumigation of two cross-linked UF-resins of molar ratio U:F 1:2.1 and 1:1.4 with ammonia reduces their formaldehyde release. The reduction seems to be more excessive in case of resin with molar ratio U:F 1:2.1. Ammonia fumigation also increases the nitrogen content of the hardened resins depending on their molar ratio U:F. Resin of the molar ratio U:F 1:2.1 is more receptive to ammonia than that o ...
DOI:
10.1007/s00107-011-0564-9

11. Preparation and characterization of polypropylene/wood flour/nanoclay composites

Author:
Alireza Ashori; Amir Nourbakhsh
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 663-666
ISSN:
0018-3768
Subject:
absorption; adhesives; maleic acid; manufacturing; mechanical loads; nanoclays; nanocomposites; polypropylenes; product quality; tensile strength; wood flour
Abstract:
... In this study, the effects of coupling agent and nanoclay loading on the mechanical properties and water absorption of composites are investigated. Composites based on polypropylene (PP), wood flour, nanoclay, and maleated polypropylene (MAPP) were made by melt compounding and then injection molding. The mechanical analysis showed that the biggest improvement of the tensile and flexural strengths ...
DOI:
10.1007/s00107-010-0488-9

12. Radio frequency heating pasteurization of pine wood nematode (Bursaphelenchus xylophilus) infected wood

Author:
Ciprian Lazarescu; Angela Dale; Adnan Uzunovic; Colette Breuil; Stavros Avramidis
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 573-578
ISSN:
0018-3768
Subject:
Bursaphelenchus xylophilus; Pinus contorta var. latifolia; dielectric heating; fumigation; methyl bromide; ovens; pasteurization; pest control; radio waves; sterilizing; survival rate; temperature; wood
Abstract:
... The research was aimed to establish whether dielectric heating at radio frequencies (RF)—an alternative method to ozone-depleting methyl bromide fumigation and to convective heating—could bring green lodgepole pine boards infested with pinewood nematodes (PWN) to pasteurization requirements. Artificially infected specimens were treated using a laboratory RF oven and post-treatment nematode surviva ...
DOI:
10.1007/s00107-010-0515-x

13. Stimulating spalting in sugar maple using sub-lethal doses of copper

Author:
Sara C. Robinson; Peter E. Laks; Dana L. Richter
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 527-532
ISSN:
0018-3768
Subject:
copper sulfate; copper; fungicides; decayed wood; wood preservation; wood mechanical properties; Acer saccharum subsp. saccharum; pigments; Xylaria polymorpha; wood preservatives; sublethal effects; metal ions; fungi
Abstract:
... Copper II is a common fungicide, especially in wood preservative formulations. Published research has noted fungal stimulation when fungi are subjected to sub-lethal amounts of copper ions. In this paper, the use of copper salts to stimulate spalting, as measured by fungal pigment production is investigated. At 1.0 kg/m3 copper sulfate, Xylaria polymorpha increased external zone lines when grown o ...
DOI:
10.1007/s00107-010-0479-x

14. Temperature and gas evolution during large scale outside storage of wood chips

Author:
F. Ferrero; M. Malow; M. Noll
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 587-595
ISSN:
0018-3768
Subject:
Pinus; aerobiosis; carbon dioxide; carbon monoxide; gases; methane; microbial activity; oxygen; temperature; weather; wood chips
Abstract:
... The temperature and gas concentrations in a newly established pine-wood debris pile of 20 m×15 m×6 m in dimensions (approximately 400 tons of fresh weight material) were monitored for 150 days. Temperature was measured at ten different positions within the pile, while concentrations of CO2, O2, CO and CH4 were taken at four different representative locations. The pile was characterized by a strong ...
DOI:
10.1007/s00107-010-0512-0

15. A simple unified model for withdrawal of lag screws and glued-in rods

Author:
Jørgen L. Jensen; Makoto Nakatani; Pierre Quenneville; Bryan Walford
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 537-544
ISSN:
0018-3768
Subject:
adhesives; energy; linear models; mechanical loads; mechanistic models; screws; shear strength; shear stress; timber connectors; wood; wood bonding; wood properties
Abstract:
... A mean stress failure criterion is applied to the Volkersen-model used for analysis of lag screws and glued-in rods subjected to withdrawal. Expressions are derived for pull-pull as well as pull-push loading conditions. The solutions for glued-in rods appear as special cases of the theory for lag screws, and the usual solutions for a maximum stress failure criterion appear as special cases of the ...
DOI:
10.1007/s00107-010-0478-y

16. Determination of fiber length and juvenile and mature wood zones from Hevea brasiliensis trees grown in Brazil

Author:
A. L. Ferreira; E. T. D. Severo; F. W. Calonego
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 659-662
ISSN:
0018-3768
Subject:
Hevea brasiliensis; bark; juvenile wood; length; pith; plantations; reforestation; trees; wood; wood fibers; Brazil
Abstract:
... The aim of this study was to verify the average fiber length and the juvenile and mature wood zones from Hevea brasiliensis proveniences from a reforestation area in Sao Paulo, Brazil. For this purpose, five Hevea brasiliensis trees were randomly collected from a 50-year-old plantation, located in Balsamo, Sao Paulo, Brazil. The trees were cut and five flat sawn boards were obtained. The juvenile ...
DOI:
10.1007/s00107-010-0510-2

17. Effectiveness of two chemical preservatives against widespread moulds of high density fibreboard

Author:
L. Giordano; G. Nicolotti; R. Zanuttini; C. Cremonini; P. Gonthier
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 667-669
ISSN:
0018-3768
Subject:
antifungal properties; conidia; fiberboards; laboratory techniques; microbial growth; molds (fungi); mycelium; potassium sorbate; proanthocyanidins; product quality standards; sporulation; tannins; wood preservation; wood preservatives
Abstract:
... In this work the effectiveness of potassium sorbate and condensed tannins against mycelial growth and sporulation of some widespread moulds of High-Density Fibreboards (HDF) for crate production was tested. Laboratory inoculation tests were performed on 130 treated and untreated samples of HDF using the European Standard EN 15457. Potassium sorbate was more effective than condensed tannins and sig ...
DOI:
10.1007/s00107-010-0505-z

18. Influence of utilization of bagasse in surface layer on bending strength of three-layer particleboard

Author:
Mohammad Dahmardeh Ghalehno; Morteza Nazerian; Ali Bayatkashkooli
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 533-535
ISSN:
0018-3768
Subject:
bagasse; resins; wood; product quality standards; bending strength; raw materials; urea formaldehyde; particle size; European Union; temperature; particleboards
Abstract:
... It is well known that wood species and particle size used influence the bending strength of three-layer particleboard. The objective of this study was to investigate the influence of using bagasse particles in surface layer on bending strength of three-layer particleboard panels. The ratio of the mixture of bagasse and wood particles was 3:7 and 4:6 in the surface and middle layers, respectively. ...
DOI:
10.1007/s00107-010-0441-y

19. Low temperature fluidized wood chip drying with monoterpene analysis

Author:
Bridget N. Bero; Alarick Reiboldt; Ward Davis; Natalie Bedard; Evan Russell
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 545-552
ISSN:
0018-3768
Subject:
Pinus ponderosa; air flow; alpha-pinene; beta-pinene; drying; lipid content; plant fats and oils; temperature; trees; volatile organic compounds; water content; wood chips; wood drying
Abstract:
... This paper describes the drying of ponderosa pine wood chips at low (20°C and 50°C) temperatures using a bench-scale batch pulsed fluidizer to evaluate both volatile pine oils (monoterpenes) and moisture losses during drying. Ten monoterpenes were measured; anecdotal information on inter-tree differences in monoterpene composition indicate that while overall total monoterpene composition is simila ...
DOI:
10.1007/s00107-010-0519-6

20. Die Performance of helical edge milling cutters in planing wood

Author:
Wayan Darmawan; Christian Gottlöber; Michael Oertel; André Wagenführ; Roland Fischer
Source:
European Journal of Wood and Wood Products 2011 v.69 no.4 pp. 565-572
ISSN:
0018-3768
Subject:
Picea abies; cutters; emissions; milling; planing; surface roughness; wood; wood quality
Abstract:
... A new design of a milling cutter with solid helical edge has been developed for improving the performance of cutting wood. Development of the new helical edge milling cutter with its geometries for planing wood has been followed by some research progresses. In this work, a conventional edge milling cutter and helical edge milling cutters were tested in planing spruce wood (Picea abies). The purpos ...
DOI:
10.1007/s00107-010-0517-8