Your search resulted in 3323 documents. Displaying 25 entries per page.
The effect of stack height on the performance of preservatives used for the prevention of sapstain on seasoning wood
1997 - IRG/WP 97-10192
The performance of three anti-sapstain preservatives was investigated under field conditions in south east England. The preservatives under test were: copper-8-quinolinolate (Mitrol PQ8) trimethylalkylammoniumchloride and sodium hexanoate (Sinesto B) and chlorothalonil (Tuff Brite). The preservatives were tested on Corsican Pine grown in south east England. The field trial was set up to investigat...
J R Williams, D J Dickinson, J F Webber
Information on a project about the conditions of admissibility of wood-protecting agents in connection with environmental protection in Poland
1974 - IRG/WP 57
Wood-protecting agents are compounds acting toxically on fungi and insects. If handled improperly or carelessly, they may exert an action harmful to health and safety of men. This action is concerning: a) workers employed at the production of wood-protecting agents; b) workers employed at the impregnation, or at the transport and handling of impregnated wood; c) inhabitants of buildings with impre...
J Wazny
A novel technique for comparative toxicity studies of potential insecticidal wood preservatives
1983 - IRG/WP 2198
For some years now a device has been under development at the New Zealand Forest Research Institute, the purpose of which is to study the effects of sub-lethal amounts of stomach poisons (but also of fumigants and contact active materials) on the co-ordinative abilities of a cerambycid larva. This insect is Prionoplus reticularis - indigenous to New Zealand its larvae feed in decaying logs and are...
D J Cross
Preservation of basidiomycete hyphae in ancient waterlogged wood materials
1992 - IRG/WP 92-1536
Studies on waterlogged archaeological wood show that basidiomycete hyphae may persist as long as 800 years. In two pine wood samples with Phellinus pini heartrot, one from the foremast of the ship Vasa and the other from a bulwark constructed in the first part of the 12th century, numerous resin covered hyphae were observed. Hyphae with clamp connections that were associated with brown and white r...
T Nilsson, G F Daniel
Alternative methodology for the environmental impact assessment of treated wood: the wood emissions ecotoxicology
2000 - IRG/WP 00-50161
Preservative products and technologies are important for optimising the use of wood and wood products in our society. The regulations of their use under the european Biocidal Products Directive 98/8/EC will require an evaluation of the environmental impact of treated wood. The methodology currently used for this determination is the PEC/PNEC ratio. It consists of calculating PEC values (Predictive...
P Marchal, H W Wegen, J Van Acker, E Melcher, R-D Peek, W J Homan, D Aston, D Rudolph, E F Baines
Wood preservation in Uruguay
1987 - IRG/WP 3404
The purpose of this paper is a brief description of the current status of wood treatment in Uruguay. The forest resources of the country are summarized, the environment, their economic importance and future potential. The present wood treating facilities are described, together with the chemicals used and the standards generally accepted. Wood treated products used in the Uruguayan market are cite...
G Baillod
Protection of pine sawtimber and sawn timber against blue stain in Poland
1983 - IRG/WP 3193
The purpose of this paper is the synthesis of more important results of basic and applied research that have been grouped in the following problems: 1.: Fungi causing blue stain in the pine wood, occurring in Poland. 2.: Moisture content changes of pine sawtimber and sawn timber as the factor of blue stain producing fungi development. 3.: Effect of sapwood moisture content on the degree of wood st...
E Tarocinski, M H Zielinski
A combined method for drying and preserving wood in a single step process
2000 - IRG/WP 00-40183
Based on a convective dryer, this process allows to dry and treat wood blocks with diffusible preservatives in the same time. A boric acid solution (heated to fix the wet temperature of the system) is pumped and introduced in the flow system through a venturi, where the air coming back from the drying cell also arrives. The role of the venturi is to create a dispersion of boric acid solution micro...
O Colin, C Dupuis, E Mougel, A Zoulalian, M-F Thévenon
Minimisation of the Environmental Impacts of Coatings on Exterior Wood by Optimisation of their Life Spans
2003 - IRG/WP 03-50197
The study has shown that the environmental impacts from coatings on exterior wood are dependent criteria on their life spans. A minimisation of the environmental impacts can be performed with the help of the integrated design model, which is tested in this study. The optimal life spans, found as reference service lives from the exposure tests, statistical evaluation and the assessment of experts w...
L Strömberg
Antagonism of Scytalidium lignicola against wood decay fungi
1989 - IRG/WP 1392
Antagonistic abilities of Scytalidium lignicola against white- and brown-rot wood decay fungi were evaluated. Scytalidium lignicola did not produce inhibition zones but overgrew the decay fungi on a malt-agar medium and in most cases killed them. Pretreatment of Douglas-fir and Southern pine blocks with Scytalidium lignicola prevented decay. Blocks that were heated or treated with propylene oxide ...
T L Highley
Note and literature survey on the "Eucalyptus borer" Phoracantha semipunctata F. (Col.; Cerambycidae), a pest in between forest and wood
1984 - IRG/WP 1228
In the Eucalyptus-forests of Huelva, Spain, Phoracantha semipunctata appears as a severe forest-pest fatal to trees impaired by drought. The population snowballed in two and a half years, millions of larvae reduce the value of wood to "papermill-quality''. One of the intentions of the paper is to collect knowledge for help and cure. A literature survey forms the main part of the ...
S Cymorek
Laboratory tests on the residual effects of pyrethroids against termites thirteen years after application
1994 - IRG/WP 94-30056
This paper is in continuation to a series of articles published on the work being developed in Brazil regarding the feasibility of using photostabl synthetic pyrethroids against termites. Tests were carried out to compare the efficacy of five synthetic pyrethroids with the traditional organo-chlorinated pesticide, chlordane. Wooden blocks were impregnated with alcohol-based solutions of the above-...
A M F Oliveira
Biological Control of Bluestain - Log Field Trials in Canada
2002 - IRG/WP 02-10423
In the summer of 2000 we ran two field experiments (in Alberta and British Columbia) to test the feasibility of using an albino bluestain isolate (Cartapip97TM) to protect lodgepole pine logs from being stained by wild-type bluestain fungi. Results showed that Cartapip applied at the recommended concentration significantly reduced the amount of stain found in the Alberta
trials. Cartapip applie...
A Uzunovic, D Minchin, A Byrne
Wood preservation in Italy
1985 - IRG/WP 3354
The report summarizes the history of wood preservation in Italy up to the present time. Information on the Italian climate and the main hazards to timber are dealt with and the amounts of timber grown and imported and exported tabulated. The main commodities treated are poles and sleepers. The amounts of preservative used have been estimated and details listed of the 10 pressure plants in the coun...
A Gambetta, E Orlandi, R Cockcroft
Immunolabelling studies on the detection of enzymes during the degradation of wood by Phanerochaete chrysosporium
1988 - IRG/WP 1364
The degradation of lignin in native lignocellulosic substrates by white rot fungi is poorly understood. Biochemical studies have shown the involvement of a number extracellular ligninolytic enzymes released by white rot fungi which are capable of the oxidative conversion of DHP's (lignin model compounds) in vitro, but to date conclusive evidence for occurrence of these enzymes in wood und...
G F Daniel, T Nilsson, B Pettersson
PXTS; A Metal Free Oligomer Wood Preserving System - A Summary of Data To Date
2004 - IRG/WP 04-30350
The world is continually looking for new wood preservative technology, especially to address environmental concerns. Recent changes in the USA have limited the use of arsenical containing formulations to industrial use through a negotiated voluntary cancellation of most residential label uses. PXTS (Polymeric Alkylphenol Polysulfide) offers a brand new technology that is an all organic system, lik...
M H Freeman, D D Nicholas, D Renz, R Buff
Environmental Impacts of CCA-Treated Wood: A Summary from Seven Years of Study Focusing on the U.S. Florida Environment
2003 - IRG/WP 03-50205
Wood treated with chromated copper arsenate (CCA) was identified in 1995 as the cause of elevated arsenic concentrations within wood fuel used for cogeneration within Florida. Since this time a research team from the University of Miami and University of Florida has evaluated the environmental impacts of CCA-treated wood within the State. Research has focused on two distinct areas: in-service l...
H M Solo-Gabriele, T G Townsend, J D Schert
Evaporation and redistribution of creosote in pine poles during storage
1996 - IRG/WP 96-50064
During the work with European standards for pressure treated wood, it has been questioned if the lapse of time between impregnation and chemical analysis of the retention is critical, especially for creosote. "The Norwegian Control Scheme for Preservative Treated Wood" has not discovered any retention problems analysing CCA preservatives in wood. If the lapse of time between impregnation with creo...
F G Evans, B Nossen
Toxic wood preserving chemicals in the environment: Kenya - a cause for concern
1998 - IRG/WP 98-50101-17
The uncontrolled release of wood preserving chemicals into the environment, in most African countries, is discussed. Kenya has some 25 wood preservation plants, 23 of which use formulations of Copper- Chrome-Arsenate (CCA). The bulk of treated timbers consists of poles and posts used in ground contact. Poor fixation of CCA elements are associated with the species used, Eucalyptus saligna and Acaci...
R Venkatasamy
Multiple-Phase Pressure (MPP) Process: One-stage CCA treatment and accelerated fixation process. 3. Effect of process variables on sapwood treatment and CCA fixation.
1998 - IRG/WP 98-40114
The Multiple-Phase Pressure (MPP) Process achieves treatment and fixation as combined process using hot CCA, within a 2-3 hour time-frame. Timber is treated to saturation with hot CCA using an empty cell process. During the pneumatic pressure phase, hot solution is held in the wood in an otherwise liquid-free treatment vessel until fixation is >95% complete.
This report details a factorial des...
H Pearson, K Nasheri, J A Drysdale, G Durbin, M E Hedley
Evaluation of decay fungi in Norwegian buildings
2005 - IRG/WP 05-10562
During a period of 2 years and 3 months (1 January 2001 - 20 March 2003) Mycoteam had 3161 consultations in buildings in southern Norway, 1428 revealing damage from decay fungi. One consultation often revealed several occurrences of fungi, and the total number of occurrences of decay fungi was 3434. Thirty-five different species/genera/groups of decay fungi were recorded. During this period brown ...
G Alfredsen, H Solheim, K Mohn Jenssen
Effects of heart wood extractives in Dahoma (Piptadeniastrum africanum) on decay resistance to white- and brown-rot fungi
2004 - IRG/WP 04-10536
Dahoma (Piptadeniastrum africanum) is a durable but a lesser utilised tropical hardwood species from Ghana that has the potential of being used as an alternative to Iroko (Milicia excelsa) for many end uses. However, the timber gives off a strong odour especially when wet and during processing. The high durability and the strong odour of the timber could be due to the presence of extractives in th...
Zeen Huang, K Maher, S A Amartey
The susceptibility to sludging of sulfate and oxide CCA
1990 - IRG/WP 3599
Radiata pine sapwood was treated separately with a sulphate CCA-C and an oxide CCA in a pilot scale pressure plant using a full cell process. CCA solutions were recovered from the final vacuum phase, placed in plastic tubes, and their susceptibility to sludging determined by examining changes in solution pH, time required for sludge to form and weight and chemical composition of sludge formed. Sul...
B T Mutandadzi, P D Evans
Wood preservation in the Netherlands
1985 - IRG/WP 3324
This report gives some information on the production, import and use of timber in the Netherlands and, in more detail, about the country's wood preservation industry. As the country's production of wood that is useful for its manufacturing industries is very limited, the position of wood in the building industry is not too important. Architects think first in terms of bricks, con...
N Burgers, R Cockcroft, D De Jong
The influence of UV and IR radiation on leaching of copper and chromium from preservative-treated pine and spruce
1992 - IRG/WP 92-3687
The influence of artifical UV- and IR-radiation on the leaching of copper and chromium components of a CCB-preservative from freshly treated pine and spruce was evaluated. On small pinewood samples it could be shown, that the leaching of copper and chromium can considerabely be reduced by UV-radiation. A Philips HPA lamp type reduced the leaching most effective. IR-radiation lead to higher leachin...
H Militz