Your search resulted in 95 documents. Displaying 25 entries per page.
An investigation of the nutritional physiology of the wood-boring weevil Euophryum confine Broun
1994 - IRG/WP 94-10082
The digestion of Picea abies Karst and Pinus sylvestris L. by Euophryum confine, at two sites is reported in this study. The composition of sound wood, wood from the heads of the weevil tunnels and the frass egested has been determined by gravimetric analysis. A comparison of sound wood and wood ingested showed that weevils tunnelled in microbially decayed wood, while a comparison of the wood inge...
A J Pitman, S M Cragg, G S Sawyer
The study of blue stain found in coniferous timber in SR Slovenia (Yugoslavia)
1983 - IRG/WP 1177
The report concerns the problems connected with blue stain in coniferous timbers stored in warehouses at wood-processing plants in SR Slovenia (Yugoslavia). The amounts of spruce-wood (Picea abies Karst.) found to have been infected with blue stain have been measured and some of the fungi causing the stain have been identified and their biology studied. It was found that the percentage of spruce-w...
R Benko
Whitewood - An external joinery timber?
1975 - IRG/WP 253
The timber used traditionally for softwood joinery in the UK is redwood (Pinus sylvestris). In the past its ready availability in the desired sizes and quality and its durability in service encouraged little competition. However, the past decade has seen some erosion of this position, particularly through the increased proportion of sapwood in redwood supplies. Since the sapwood is less durable th...
J W W Morgan
The resistance of wood coated with different water-borne paints against colonisation by decay fungi
1996 - IRG/WP 96-10165
The susceptibility of wood painted with model paints of known composition to decay fungi was tested without previous weathering. Included in the study were five alkyd emulsion paints and five acrylic paints; one linseed oil paint and two solvent-borne alkyd paints. It was found that several components influenced the susceptibility of these paints. The results of the present study indicate that the...
J Bjurman
Identification of fungi colonising coated and modified wood exposed outdoors using sequencing and T-RFLP profiling
2006 - IRG/WP 06-20326
Wood decay and staining fungi are known to colonize coated and modified wood. Rapid and reliable ways of identifying fungi on coated and modified wood may improve diagnostics and product development. In this work nine fungi growing in painted wood panels exposed outdoors at a test field in Uppsala, Sweden, were identified using sequencing and T-RFLP (Terminal Restriction Fragment Length Polymorphi...
U Råberg, J Bijelovic, C J Land, S Bardage, N Terziev
Wood plastic composites from modified wood; Part 1 - Conceptual idea, mechanical and physical properties
2006 - IRG/WP 06-40338
Wood plastic composites, WPCs, are rapidly taking shares from preservative treated wood on the decking market. However, the long term performance of the WPC products in this application is uncertain. Therefore, in an attempt to increase the long term performance and durability, the substitution of the unmodified wood component with modified wood has been studied in the work presented in this paper...
P Larsson Brelid, B K Segerholm, M Westin, M E P Wålinder
Multivariate analysis of infrared spectra for the prediction of the mechanical performance and dimensional stability of thermally modified wood
2007 - IRG/WP 07-40367
The use of calibrated mid-infrared Fourier transform (FTIR) spectroscopy for predicting the main bending strength parameters of thermally modified wood is described for the first time. The analysis is based on the handling of OSC-filtered FTIR data from control and treated wood samples, using partial least squares (PLS) regression.
Sets of Norway spruce, Scots pine and Beech wood samples were th...
M M González-Peña, M D C Hale
Run-off quality from sprinkled debarked logs and logs with bark from Picea abies and Pinus contorta
2007 - IRG/WP 07-50248
Storage of roundwood is necessary for efficient industrial production at sawmills and pulpmills. The need for wood storage becomes even more critical when large storm fellings create huge volumes of wood that is at risk for deterioration. In Scandinavia, the technique of sprinkling of water on roundwood is used to protect stored wood from fungal and insect infestation and drying during the summer....
M Jonsson
Radial flow of Bornmullerian fir (Abies bornmulleriana Mattf.) as affected by wood tapering and the condition of end wall structure of uniseriate ray parenchyma cells
2008 - IRG/WP 08-40441
Amenability to radial permeability of Bornmullerian fir (Abies bornmulleriana Mattf.) was studied on the base of the effects of wood tapering and the structure of end walls of uniseriate ray parenchyma cells. The results showed that the most remarkable culprits of the greatest fluid uptake (as the percentage of void volume filled by the fluid in the radial flow direction, RVVF%) are the lesser woo...
I Usta, S Aslan
Comparison of permeability at different levels of moisture content in Bornmullerian fir (Abies bornmulleriana Mattf.) and Eastern spruce (Picea orientalis L.) impregnated under vacuum/pressure through full-cell method by using CCA and CCB of different concentrations
2007 - IRG/WP 07-40366
In this study, a comparison has been made in terms of the combined, longitudinal, tangential, and radial permeability of the species of Bornmullerian fir (Abies bornmulleriana Mattf.) and Eastern spruce (Picea orientalis L.) with moisture contents of 50 % and 15 %, which were impregnated under vacuum/pressure through full-cell method by using water-borne wood preservatives (impregnation materials)...
I Usta
Evaluación de oxinato cúprico como alternativa al tribromofenato de sodio, para uso como funguicida antimancha. Ensayo final y conclusiones
2008 - IRG/WP 08-30481
This study evaluated the efficacy of oxine-copper (Cas Nº 10380-28-6. Synonyms: copper oxyquinolate, cupric-8-hydroxyquinolate, copper-8-quinolinolate) for the control of stain fungi in lumber. Three field tests were established and sodium tribromophenate was used as a reference preservative. Boards of Pinus elliotis and P. taeda were treated by dipping for 15, 30 or 60 seconds in two different f...
M Alba Valle
Effects of concentration and temperature of CCA and CCB on wood strength of Turkish fir (Abies bornmulleriana Mattf.)
2009 - IRG/WP 09-40450
The purpose of this study was to present evidence for the effects of concentration and temperature of solutions of water-borne preservatives (chromated copper arsenate, CCA and chromated copper boron, CCB) on the static bending properties (modulus of elasticity, MOE and modulus of rupture, MOR) of Turkish fir (Abies bornmulleriana Mattf.). Wood samples were mechanically tested after a mild full ce...
I Usta, M Hale
Physical and Mechanical Properties of Hydrothermally Modified Mulberry (Morus alba L.) Wood
2009 - IRG/WP 09-40481
This research was carried out to investigate influences of hydrothermal modification on physical and mechanical properties of mulberry wood that is used for musical instruments in Iran. Samples of mulberry wood were cut into size of 20x20x360 mm and placed in a water filled stainless steel cylinder and treated at temperatures of 100, 120 and 140ºC for 1 and 5 hours. Treated samples were subjected...
A Talaei, K Yaghoobi
Modelling hyphal growth of the bio-incising fungus Physisporinus vitreus
2010 - IRG/WP 10-10710
The white-rot fungus Physisporinus vitreus preferentially degrades the pit membranes of bordered pits in tracheids and subsequently enhances wood permeability. Thus, P. vitreus can be used to improve the uptake of wood preservatives and environmentally-benign wood modification substances. This process can be used to enhance the use and sustainability of native conifer wood species by the wood indu...
M Fuhr, C Stührk, F W M R Schwarze, M Schubert, H J Herrmann
Natural durability of Mulberry wood from Iran
2010 - IRG/WP 10-10737
Mulberry wood (Morus alba L.) is traditionally used in Iran to manufacture music instruments such as tar and setar. But little is know and contradictory statements are found on the natural durability of Morus alba. Moreover, in many cases, Iranian instrument makers leave freshly cut Mulberry timber into water (cold or hot) for a time period depending on the craftsman habit, without any real knowle...
A Se Golpayegani, M-F Thevenon, J Gril, K Pourtahmasi
Effect of Nano-silver Treatment on Densified Poplar Wood Properties. Part Two: Spring Back, Compression set, Impact Load Resistance and Hardness
2011 - IRG/WP 11-40568
This paper is the second part of the study of applying nano-silver treatment before densification of poplar wood (Popolus alba). The specimens were prepared in four groups of: 1) nano-silver impregnated 2) water impregnated 3) dried with no impregnation and 4) the control specimens. The impregnation process was done by empty cell process. Then, the groups of 1 to 3 were compressed in a hot press a...
G Rassam, H Reza Taghiyari, B Jamnani, M Ali Khajeh
The influence of microclimate on the moisture conditions in a Norway spruce (Picea abies (L.) Karst.) joint exposed to artificial rain
2013 - IRG/WP 13-20505
Wood structures outdoors are susceptible to decay if they are exposed to high moisture contents during long periods of time. Structures with joints that act as water traps are especially exposed since high moisture contents are reached in such positions. This paper presents a part of a laboratory study that concerns the relationship between the microclimate and the material climate, i.e. the moist...
M Fredriksson, L Wadsö, P Johansson
Unexpected natural decay resistance strategies of durable tropical woods Bocoa prouacencis, Vouacapoua americana, Inga alba and relationship with specific gravity and wood extractives
2014 - IRG/WP 14-10832
The study of decay resistance in wood is of interest for wood end-users but also for the global carbon balance since wood biodegradation is a key driver of forest ecosystem functioning through its impacts on carbon and nutrient cycling. We studied the specific gravity and wood extractive contents in order to understand decay resistance against soil microflora after 90 days exposure of sapwood and ...
N Amusant, M Migg, B Thibaut, J Beauchene
GC-MS Characterizations of Termiticidal Heartwood Extractives from Wood Species Utilized in Pakistan
2016 - IRG/WP 16-10857
Wood species that exhibit innate tolerance to wood destroying organisms such as termites are considered to be naturally durable. This durability can, in part, be due to the complex chemical compounds in the heartwood of naturally durable wood species. We examined the effects of varying concentrations of heartwood extractives on the subterranean termite, Reticulitermes flavipes from four wood spec...
M E Mankowski, B Boyd, B Hassan, G T Kirker
Monitoring uptake and penetration of pesticides during impregnation of pine (Pinus sylvestris) and spruce (Picea abies) wood with bio-based microemulsion gel formulations
2020 - IRG/WP 20-30756
Even in dry state wood is susceptible to biological degradation. Preservation against biological decay in exposed conditions is conventionally achieved by impregnating the wood with pesticides applied at professional and industrial levels. Impregnation of wood with preservatives is a complex process that involves wood macro- and microstructure, and the physical characteristics of woods. Here we fo...
D Messaoudi, K Ruel, J-P Joseleau