Your search resulted in 3483 documents. Displaying 25 entries per page.
Assessment of wood decay in small-scale unsterile soil-bed tests
1997 - IRG/WP 97-20111
This study is concerned with the investigation of wood decay in small-scale unsterile soil-bed tests. Tests were performed with untreated heartwood samples from five hardwood species of different natural durability classes ranging from highly perishable to very resistant. Our results confirmed the critical role of soil moisture content on wood decay. The highest decay rates were observed at moistu...
L Machek, A M Derksen, R Sierra-Alvarez
Protection of wood blocks treated with Trichoderma isolates selected on the basis of preliminary agar screening studies
1996 - IRG/WP 96-10154
Previously reported results of agar interaction screening studies for biocontrol agents of wood decay basidiomycetes showed two Trichoderma viride isolates, killed 16 of 19 target fungi (Tucker and Bruce, 1995). Testing of these isolates in wood was required to assess their performance at preventing decay of wood blocks. Standard testing of chemical wood preservatives is used to determine the toxi...
E J B Tucker, A Bruce, H J Staines
Risk assessment of energetic valorization of treated wood - wooden recycling
1996 - IRG/WP 96-50072
The most useful method for the valorization of wood wastes and wooden wastes is energetic valorization. In France the percentage of wood treated by antisaptain products is around 30%. Currently with the growing regulation, there is a need for cleaner methods and technology to allow sustainable valorization. The preservatives concerned are common organochlorine compounds (NaPCP) less used nowadays ...
G Deroubaix, P Marchal, G Labat
A technique for assessing the preventive efficacy against decay fungi of preservative treatments applied to wood
1988 - IRG/WP 2309
A method is described in which test blocks with envelope preservative treatments can be challenged by selected test fungi previously established on an untreated feeder block. The progress of the test fungus through the treated zone is monitored using novel baits or sensors inserted in holes drilled into blocks to within predetermined distances of the face being challenged. Preliminary results show...
J K Carey, A F Bravery
Remedial ground-line treatment of CCA poles in service. Results of chemical and microbiological analyses 6 months after treatment
1986 - IRG/WP 3388
CCA-treated poles in service with incipient internal soft rot were remedially treated by inserting borate rods, brushing with a boron/glycol solution and injecting boric acid paste, copper/creosote paste or a commercial product (DFCK paste). The spread of active chemicals in the treated zone as well as the change in microflora have been studied with time. After six months chemicals had spread to m...
B Henningsson, H Friis-Hansen, A Käärik, M-L Edlund
Quality of timber impregnated with preservatives of class AB
after three years in service
2002 - IRG/WP 02-20241
Quality of impregnated timber is most often expressed by penetration and retention of the preservative used. Relatively less information is available about the performance of the final product, e.g. decks, panels etc. regarding product’s surface checks, deformations and overall appearance. Together with the timber durability, the above mention features are of esthetical importance in the above g...
N Terziev
Statistical evaluation of 'micro-bending' samples for classification of wood attacking fungi
1992 - IRG/WP 92-1544
Micro-specimens from both hardwood and softwood were exposed to selected species of field isolated fungi. The strength reduction and weight loss caused by these fungi were determined. A statistical procedure was then developed to classify the fungi into brown-, white-rot, or non-decay fungal categories based on these data. The procedure reveals the extent of hazard a fungus poses to wood members. ...
B Goodell, Jing Liu, A Homola, J Jellison, J Shottafer
Durability of five wood species against Coriolus versicolor
1992 - IRG/WP 92-1578
The durability of following five wood species Zelkova carpinifolia, Ulmus glabra, Carpinus betulus, Acer trauvetteri and Pterocarya fraxinifolia were studied against Coriolus versicolor under laboratory conditions according to DIN 52176 standards. Zelkova caprinifolia shows a reduction in weight of 2.19%, Ulmus glabra 41.69%, Carpinus betulus 45.64%, Acer trauvetteri 53.05%, and Pterocarya fraxini...
S M Kazemi
Variance in feeding on equivalent wood blocks by the Formosan subterranean termite (Coptotermes formosanus Shiraki)
1987 - IRG/WP 1325
We tested whether laboratory groups of Coptotermes formosanus Shiraki forage randomly when they are given 4 equivalent wood blocks, and whether group size affects variance of feeding on equivalent blocks. In all cases, foraging was not random, but, rather, the termites concentrated on a few preferred blocks. Group size did not affect this pattern of non-randomness. These data are useful for design...
J P La Fage, K S Delaplane
Analysis of water repellents in wood treated with water borne formulations using FTIR
2000 - IRG/WP 00-40176
The use of aqueous water repellent emulsion formulations has increased significantly in the wood treatment industry. These products are primarily used to enhance the weathering characteristics of wood products treated with water borne preservatives systems used in exterior above ground applications. They are also used in pole treatments to improve climbing characteristics and in low VOC millwork t...
P J Walcheski, L Jin
SEM investigation of the production of extracellular mucilaginous material (ECM) by some wood inhabiting and wood decay fungi when grown on inert surfaces
1997 - IRG/WP 97-10194
A range of wood inhabiting and wood decay fungi have been studied for their production of extracellular mucilage when grown on inert surfaces, for comparison with their growth on wood. The species tested were: Coniophora puteana, Coriolus versicolor, Chaetomium globosum, Trichoderma harzianum, Ceratocystis coerulescens, Ophiostoma piceae, Mucor sp. and Penicillium sp. They were grown on plastic me...
A R Abu, R J Murphy, D J Dickinson
Effects of drying processes on termite feeding behaviour against Japanese larch wood
2001 - IRG/WP 01-10390
We investigated the effects of current drying schedules for larch lumbers on the termite feedings. Thermal analyses were also conducted to investigate degradation of wood components. Choice feeding tests showed specimens dried under high-temperature schedules were evidently susceptible against termite attacks. These schedules produced the feeding-attractants, which were suggested by the TGA result...
S Doi, Y Kurimoto, H Takiuchi, M Aoyama
The practice of using concrete on wood piling for marine use in Thailand
1982 - IRG/WP 492
The practice of using concrete on wooden poles has been carried on in Thailand for a long time in pile-houses and pier constructions which have been situated in, or partly in the sea. In such instances, the hewed round and/or square-sawn heartwood poles of naturally durable timber species have been coated with concrete of about 5 to 10 cm or more in thickness, and to about 100 cm above the highest...
B Anuwongse
Recycling of treated timber by copper smelter
1994 - IRG/WP 94-50030
A preliminary trial was carried out to see whether copper smelting process is able to recycle CCA treated timber. As a result of the first trial almost a full recovery of both copper and arsenic was achieved. Recovered metals were utilized in manufacturing CCA preservatives. The energy bound in wood is utilized in the flash smelting process and the burning gases are fed to the sulphuric acid plant...
A J Nurmi, L Lindroos
Copper naphthenate-treated Southern Pine pole stubs in field exposure: - Part 1: Gradient & biodeterioration analysis 12 years after treatment
2000 - IRG/WP 00-30242
Naphthenates have been used for the preservation of timber and cellulose since their original identification in Russia in the early 1880's as part of a series of petroleum characterizations. Later work in the development of copper naphthenate as a heavy-duty preservative for poles led to the development of various treating cycles similar to other oil-borne systems. Recent work concerning ...
H M Barnes, M H Freeman
Work programme of CEN/TC 38 (May 1995) - Durability of wood and derived materials
1995 - IRG/WP 95-20069
Standardization of the characteristics of natural or conferred durability of wood and its derived materials against biological agents, including the characteristics of protection products and associated processes to obtain this durability. This applies in particular to: - the identification of hazard classes; - the test methods (wood preservatives as treated wood and wood based materials) and inte...
R Hüe
Effect of alkaline phenolic resin adhesive on the stability of preservatives incorporated into the glue-line of plywood
1991 - IRG/WP 3650
Stability of preservatives was determined by gaschromatographic analysis when they were applied to glue-line treatment of plywoods. Among organophosphorous insecticides, emulsified forms of chlorpyrifos, dichlofention and diazinon were more stable than others. Fenitrothion, pyridafenthion and phoxim were not practically acceptable as emulsifieable forms due to the relatively low recovery rates aft...
S Fushiki, Y Katuzawa
Solvent extraction of CCA-C from out-of-service wood
1998 - IRG/WP 98-50107
Elimination of CCA from decommissioned wood prior to disposal is a major environmental issue. One approach is to extract CCA from treated wood, then reuse the 'clean' (may contain CCA, but below hazardous level) wood materials for manufacturing wood-based composites. In the present paper, we focus on effective leaching processes, selection of leaching agents and optimum leaching ...
K M F Kazi, P A Cooper
Wood colonizing fungi as a human pathogen
1992 - IRG/WP 92-1523
Today we recognize some 174 "pathogens" among the approximately 100000 species of fungi, which cause different diseases on man. 24 fungi which are well known as wood colonizing fungi have been identified as opportunistic human pathogen. Some of them have been found on the surface of the human body, causing superficial mycoses, or cutaneous infection, like dermatophytosis or dermatomycosis. Other c...
R Benko
Marine trial progress report
1980 - IRG/WP 453
In May 1977 and May 1978, tests of new chemical formulations for the protection of timber in the sea were installed in Mt. Maunganui Harbour. Investigation into new preservatives for such usage was urgently required since it had been found that there was progressive leaching of copper from copper-chrome-arsenate treated marine piles which could lead to a reduction in their service life. Hochmann (...
A F Preston, C M Chittenden
Chlorothalonil: A new ground contact wood preservative
1992 - IRG/WP 92-3712
Extensive investigations have been conducted in recent years on the performance of chlorothalonil (tetrachloroisophthalonitrile) as a ground contact wood preservative. Efficacy information is presented on a soil block test with 11 Basidiomycetes, a fungus cellar evaluation, above-ground field testing against termites in Australia and Hawaii, and ground-contact field stakes installed in Florida (9 ...
P E Laks, T L Woods
Limiting Conditions for Decay in Wood Systems
2002 - IRG/WP 02-10421
Hygrothermal models can predict temperature and moisture conditions in wall components subjected to real weather data, but specific data and a fundamental understanding of how temperature and wood moisture content dictate the progression of decay under these conditions is required for modellers to predict consequences of decay on building performance. It is well understood that wood will decay abo...
P I Morris, J E Winandy
Proposed model for the penetration and decay of wood by the hyphal sheath of the brown-rot fungus Postia placenta
1989 - IRG/WP 1391
Scanning electron microscopy (SEM) of Pinus sp. decayed by the brown-rot fungus Postia placenta confirmed the existence of extracellular membranous structures previously described by transmission electron microscopy (TEM). These structures appear to be an integral part of the hyphal sheath and assume a variety of forms including lamellar sheets, fibrils, and vesicles. These structures were observe...
F Green III, M J Larsen, L L Murmanis, T L Highley
FIPRONIL - une nouvelle molécule insecticide Rhône Poulenc pou le PCO et la protection du bois [FIPRONIL - A new insecticide from Rhône Poulenc for PCO and wood preservation]
1995 - IRG/WP 95-50040-16
We will explain here after the advantages and key points of the new insecticide "FIPRONIL" from Rhône Poulenc Agrochemicals. We will have a look from the physical and chemical properties to the possible uses in PCO and wood preservation, including toxicology, efficacy and the main beneficial impacts on the environment. FIPRONIL, a new solution against undesirable and damageable insects, from cock...
M G E J Van Maanen
Application of (n-a)-radiography for determination of boron in wood impregnated with boron-containing antispetics
1975 - IRG/WP 351
The method of (n-a)-radiography for quantitative determination of boron is based on creation of defective regions (tracks) in a polymer (the detector), which form during passage of a particles through the detector, these particles being produced in the reaction 10B(n, a)7Li when the test specimen in contact with the detector is irradiated with neutrons. Etching of the detector with an appropriate ...
N A Dubinskaya, M Ya Tsel'millere