Your search resulted in 1150 documents. Displaying 25 entries per page.
Preliminary testing of an improvised wood preservative mixture applied against dry wood beetles
1986 - IRG/WP 1308
An improvised wood preservative mixture was preliminarily tested in situ against some dry wood beetles which had infested structural timbers in a semi-finished building. The results obtained should encourage further research towards mobilizing/improvising locally available resources in the face of scarce standard wood preservatives, against the background of a dilemma in wood utilization in the de...
M O Akanbi, E M Bayode, A A Alabi, J Gbadebo
Special seminar on screening techniques for potential wood preservative chemicals
1978 - IRG/WP 2113
This paper continues following issues:
I. SCREENING INSECTICIDES
1) R W Berry (BRE/PRL, UK): Screen testing of insecticides for use in remedial wood preservatives.
2) D J Cross (FRI, New Zealand): Rapid screening of contact insecticides for use on forest products.
3) C R Coggins; A Forsyth; A E Glaser (Rentokil, UK): Experience in the use of indicative screening techniques for termiticides.
...
Anonymous
Microwave treatment to Accelerated fixation of copper-ethanolamine (Cu-EA) treated wood
2004 - IRG/WP 04-40271
This study evaluated the use of microwave post-treatment to accelerate fixation of copper-ethanolamine (Cu-EA) treated 19 mm southern yellow pine sapwood cubes. Cubes were pressure treated at 3.2 and 6.4 kg/m3 Cu retention target, after which they were microwave post treated during different duration periods. An accelerated AWPA leaching test was conducted during 300 hours to determine the amount...
Jinzhen Cao, D P Kamdem
Influence of preservative treatment on the glueing of the members of glued laminated frames and effectiveness with respect to newly hatched larvae of the house longhorn beetl
1971 - IRG/WP 203 E
The object of the work is to check the general properties of a glued laminated beam after treatment of the members composing it by means of commercial insecticidal and fungicidal formulations in clear solvent under the most common conditions of manufacture. The species used have been spruce, redwood and Douglas fir in planed boards of 80 cm long, 14 cm wide and 20 mm thickness at about 12% moistur...
J Guillemain-Thévenot
Commercial antisapstain chemicals in New Zealand
1980 - IRG/WP 3142
Almost all sawn timber of exotic softwoods (principally Pinus radiata) and a large proportion of indigenous sawn timber receives an antisapstain chemical treatment to prevent fungal degrade during subsequent seasoning, storage, or transportation (if exported). Antisapstain chemicals are also widely used to protect freshly peeled round produce during drying. A further, specialised, use is as the fu...
J A Butcher
Fungicidal effectiveness of amended alkylammonium compound
1987 - IRG/WP 3421
Amendment of didecyldimethylammonium chloride was attempted to improve its fungicidal effectiveness and properties of treating solutions. Addition of copper definitely increased effectiveness in controlling wood decay fungi, although metal corrosiveness and stability of treating solutions was unsatisfactory. Further amendment with stabilizer(s), anticorrosive agent(s) and sequestering agent(s) res...
K Tsunoda, K Nishimoto
Effect of species, retention and conditioning temperature on copper stabilization and leaching for ACQ-D
2004 - IRG/WP 04-30342
The time to stabilization or equalization of the copper component of ACQ-D was highly dependent on treating solution concentration (preservative retention) and post treatment temperature. Stabilization was rapid for low preservative retentions but extended times were needed for wood treated with higher concentration solutions. The extent of stabilization was also concentration dependent with a h...
Y T Ung, P A Cooper
Diffusion and interaction of components of water-borne preservatives in the wood cell wall
1988 - IRG/WP 3474
This study investigates the rates of diffusion and ultimate distributions of copper and arsenate components of wood preservatives in wood cell walls following vacuum treatment. Adsorption studies of copper on red pine (Pinus resinosa) and trembling aspen (Populus tremuloides) wood confirm the importance of cation exchange reactions on the ultimate distribution of copper in the wood substance and i...
P A Cooper
Characterization of Poria indoor brown-rot fungi
1995 - IRG/WP 95-10094
The heterogeneous group of "Poria" fungi causing brown rot in buildings and also of wood in ground contact comprises Antrodia vaillantii, Antrodia serialis, Antrodia sinuosa, Antrodia xantha and Tyromyces placenta. These fungi have similar morphological appearance and biology. Their nomenclature has a confusing history and is still not uniform. As a consequence, misinterpretations may occur. SDS p...
O Schmidt
Termite resistance classification of some tropical and temperate species based on the laboratory choice test results against formosan termite, Coptotermes formosanu
2004 - IRG/WP 04-20291
The results of classification of termite durability were varied. We carried out
laboratory evaluation of the classification of termite durability on various species by
the choice test against formosan termite, Coptotermes formosanus. We classified five
grades (very sensitive to very resistant). According to our results, azobe, ipe, keruing,
intsia, kapur, yellow meranti, jarraah, malas, cypres...
K Suzuki
Optimisation of an analytical method for the determination of total fluoride in preservative-contaminated soils using water steam distillation and an ion-selective electrode
1999 - IRG/WP 99-20153
This paper describes a simple modified procedure for the quantitative fluoride determination of different origin in a soil matrix using a water steam distillation and an ion-selective electrode. Distillation methods generally require a preliminary preparation step like fusing. The modified method presented here is based on the direct distillation of fluoride so that no further sample preparation i...
E Melcher
The quantitative determination of N-cyclohexyl-diazeniumdioxide (HDO) containing compounds in treated wood using TD-GC-MS
2001 - IRG/WP 01-20223
Last year we presented the paper (IRG/WP/00-20201) "Determination of N-cyclohexyl-diazeniumdioxide (HDO) containing compounds in treated wood using GC-MS". Based on the intensive discussion at the meeting, the first experiences made with the calibration of the system for this application will be reported. For the quantitative determination of N-cyclohexyl-diazeniumdioxide in treated wood, milled m...
P Jüngel, J Wittenzellner, E Melcher
EPA’s Current Views on Heavy-Duty Wood Preservative Regulation
2003 - IRG/WP 03-50206
This paper describes the current EPA system for regulating pesticides and wood preservatives. In particular it focuses on the voluntary phase-out of CCA for residential uses after December 30, 2003, which was agreed between the CCA manufacturers and EPA. Even though the EPA reached an agreement with industry to phase out CCA for residential uses, EPA is continuing the most rigorous risk assessmen...
F T Sanders
Effect of species composition of preservative-treated Douglas fir plywood on its decay resistance
1978 - IRG/WP 2114
Plywood is now commonly used for constructional purposes in environmental situations where decay by wood-destroying fungi can be a considerable risk. However there seems to be a lack of understanding of the relative durability of plywood, both untreated and when treated with wood preservatives. Part of the reason for this situation has been the difficulty of carrying out laboratory decay tests on ...
R S Smith, P Balcaen
Methods for improving preservative penetration into wood: a review
2002 - IRG/WP 02-40227
Pressure treatment technologies have been available since the mid-1830's, but the processes used for wood treatment are still largely unable to overcome the fundamental limitations of flow through semi-permeable pit membranes. Instead, methods have arisen that attempt to improve treatability of the wood including incising, compression rolling, through boring, or radial drilling. Other a...
J J Morrell, P I Morris
Basilit CCFZ. Further studies on ecotoxicological behaviour
1992 - IRG/WP 92-3722
Basilit CCFZ is a new developed water based preservative for the protection of timber in hazard class 4 and 5 (ground-, fresh- and salt-water contact). The active components of this salt are copper, chromium, zinc and fluorine. In addition to primarily studies on the acute toxicity against organisms of the aquatic food chain a long term ecotoxicological study was performed. In a prolonged toxicity...
H W Wegen
Fouling assemblage development on copper-chromium-arsenic-treated timber submerged in European waters
2002 - IRG/WP 02-50181
The effect of the anti-marine-borer timber preservative CCA on community development of non-target marine fouling animals was investigated. Panels of Scots pine treated to target retentions of 12, 24 and 48 kg CCA per m3 of wood, plus untreated controls were submerged at seven coastal sites (Portsmouth, UK; La Tremblade (2 sites), France; Ria Formosa, Portugal; Sagres, Portugal; Kristineberg, Swed...
C Brown, R J Eaton, S M Cragg, P Goulletquer, A Nicolaidou, M J Bebianno, J Icely, G F Daniel, T Nilsson, A J Pitman, G Sawyer
The influence of staining fungi on the decay resistance of wood treated with alkylammonium compounds
1984 - IRG/WP 3308
Although found to be very effective in laboratory tests, alkylammonium compounds (AAC's) have failed to perform as well in field stake tests. Examination of leachability showed that this was not the cause. The present study investigated the possibility that staining fungi, (which have been observed to rapidly infect the field stakes), degrade the AAC wood preservative. Soil-blocks were tr...
J N R Ruddick
Accelerated weathering test for the evaluation of wood preservative efficacy
2003 - IRG/WP 03-20262
Wood samples treated with ammonium copper quat (ACQ-1900 and ACQ-2200), Chromated copper arsenate (CCA), Tanalith E 3491 and Wolmanit CX-8 have been studied in accelerated weathering experiments.
The weathering experiment was performed by cycles of 2 hours UV-light irradiation followed by water spray for 18 minutes. The changes on the surface of the weathered samples were characterized by FTIR Sp...
A Temiz, M Eikenes, Ü C Yildiz, F G Evans, B Jacobsen
Environmentally benign wood preservatives based on organic biocide antioxidant combinations: A brief review of laboratory and field exposure results and discussion of a proposed mechanism
2004 - IRG/WP 04-30335
The combination of various organic biocides with commercial antioxidants generally increased the biocides’ efficacy 2-3 fold against wood-destroying fungi in short-term laboratory decay tests, and some positive results have been obtained after 2-4 years of outdoor exposure. The two antioxidants principally examined, propyl gallate and butylated hydroxytoluene, are low cost and, since both are f...
T Schultz, D D Nicholas, W Henry, C Pittman, D Wipf, B Goodell
Development of a mini-block test method for the rapid evaluation of preservative performance against Basidiomycte fungi
1991 - IRG/WP 2379
Screening procedures for new biocides used as wood preservatives can be a time consuming process using conventional Basidiomycete assay procedures. This is due mainly to the long exposure periods required to achieve adequate levels of decay (weight loss) in the test blocks. A number of alternative methods have been developed but most utilise artificial substrates such as filter paper or agar in wh...
J Brown, S Caswell, G R Williams
Performance of copper-chrome formulations in ground contact in five test sites in New Zealand
1996 - IRG/WP 96-30113
Copper-chrome-arsenate (CCA), copper-chrome-boron (CCB), copper-chrome-fluoride (CCF) and copper-chrome-phosphate (CCP) have been tested at four retentions each in ground contact (25 x 50 x 500 mm³ radiata pine sapwood stakes) for 16 years in five test sites in New Zealand. Results to date show that test site characteristics have a marked effect on relative performance. In a warm and wet site (an...
M E Hedley, R N Wakeling, J Foster, B E Patterson
Properties of particleboard made from recycled CCA-treated wood
2000 - IRG/WP 00-50146
Recovery of chromated copper arsenate (CCA)-treated wood for reuse ha s been the focus of several international research groups due to the imminent disposal problem created when large quantities of CCA-treated wood ultimately come out of service. Bioleaching with Bacillus licheniformis CC01 and oxalic acid extraction are two methods known to remove significant quantities of metals from CCA-treated...
C A Clausen, S N Kartal, J H Muehl
Preliminary results from the field experiment to determine the performance of preservative treated hardwoods with particular reference to soft rot. The four reference timber
1980 - IRG/WP 3164
The results given in the Tables 1-4 each refer to one of the four reference species treated with four solution concentrations of CCA as recorded from each test site. The species are: Alstonia scholaris, Betula pendula, Fagus sylvatica, Pinus sylvestris. The treatments were: Untreated, 0.66% CCA, 1.53% CCA, 3.01% CCA, 5.60% CCA. Each figure is an average of the ratings recorded for each replicate o...
J F Levy, D J Dickinson
Electrochemical deterioration of wood in sea-water
1981 - IRG/WP 464
In the specialistic literature only few items can be found dealing with the specific kind of wood deterioration called electrochemical corrosion of wood. This deterioration occurs predominantly on marine vessels, yachts, and other marine craft where wood is jointed by means of various metal connectors. Up to date information demonstrates that in wood surrounding copper connectors, when in proximit...
J Raczkowski