Your search resulted in 6688 documents. Displaying 25 entries per page.
Micromorphology of decay in Keruing heartwood by the basidiomycetes Phellinus contiguus and Dacrymyces stillatus
2002 - IRG/WP 02-10454
This study aimed to characterise the micromorphology of fungal decay in a wooden handrailing in an above ground exposure at the Thames embankment in London. Keruing heartwood (Dipterocarpus spp.) was determined as the construction timber and the two basidiomycetes Phellinus contiguus and Dacrymyces stillatus identified as main decay organisms.
Their decay patterns within Keruing heartwood were...
G Kleist, M Ray, R J Murphy
Tebuconazole - A new triazole fungicide for wood preservation
1990 - IRG/WP 3629
The main cause of economic damage to timber and millwork worldwide are Basidiomycetes (brown and white rot). After testing a wide range of triazole derivatives for their effectiveness against decay fungi, Tebuconazole, a triazole compound, was selected. The physico-chemical, toxicological and ecotoxicological data of this substance are described. Tebuconazole is unleachable, light-stable, heat-sta...
R Gründlinger, O Exner
Sulfluramid, a new bait concept for the control of termites
1995 - IRG/WP 95-30075
The annual cost of preventing, controlling and repairing the damage done by termites in the United States of America is in the billions of dollars. Current termite control methodology is generally effective in the control of termite activity. However, new technology (termite foams, termite baits, physical barriers) is emerging which has or will provide new tools to control termites. This report ce...
J B Ballard, T K Porter
Some aspects of testing water repellents
1998 - IRG/WP 98-40113
Several test methods are used to determine the efficiency of water repellent treatments on wood. The most common are: contact angle measurement, swelling rate of samples immersed under water and, the increase in mass of wood samples with time or after a fixed period of time either fully immersed under, or partially immersed in or floating on water.
In this paper, some fundamental aspects of the l...
D Lukowsky, M Farnow, T Rypstra
Preliminary evaluations of a small wafer assay for screening potential biological control agents
1989 - IRG/WP 2332
Screening potential biological agents for controlling wood decay fungi poses a dilemma. The ideal test would eliminate as many variables as possible. Most tests utilize pure cultures of the test organism on an artificial media which in no way resembles wood. The use of sawdust improves this approach, but the sawdust increases fungal access to the lignocellulose matrix, potentially inflating the im...
C M Freitag, J J Morrell
Microbial decay in an extremely durable Malaysian hardwood Belian (Eusideroxylon zwageri) - an overview
1997 - IRG/WP 97-10216
The heartwood of Belian (Eusideroxylon zwageri) is highly regarded among the naturally durable Malaysian hardwoods, and is therefore a choice timber for soilcontact use in the humid tropics such as untreated telecommunication poles, fence posts and railway sleepers. The high microbial resistance of the wood is evidenced by the mere superficial degradation observed in some pole samples after 20 yea...
A H H Wong, A P Singh
Research on wood protection at the Princes Risborough Laboratory 1975 & 1976
1977 - IRG/WP 3109
This paper is the latest of a 2-yearly series presenting a summarised account of the Laboratory's work in wood preservatives and related fields. The topics dealt with include: environmental studies on the usage of copper-chrome-arsenic and organic solvent preservatives; development of National and International Standards; recent developments in the preservation of external doors and windo...
J M Baker, R A Laidlaw, E R Miller, J G Savory
Movement of water through quaternary ammonium treated wood
1987 - IRG/WP 3440
Radiata pine sapwood stakes were treated with didodecyl methyl 1, 3 dichloropropenyl ammonium chloride and distearyl dimethyl ammonium chloride. Various ratios of these two chemicals were, tested to determine the extent of water movement through the treated wood. Measurements were taken of the amount of water moved through the wood, degree of wetting of various sectors of the stakes, and the distr...
P J Hayward, J Duff
Sapstain development on Jack pine logs in Eastern Canada
2000 - IRG/WP 00-10358
During 1998-99, a study was initiated to investigate the influence of seasons, log types and storage time on the sapstain development on jack pine logs at two sites in Eastern Canada. Jack pine trees (Pinus banksiana) were harvested into whole-tree and cut-to-length logs in spring and in autumn. Sapstain development was examined in these logs at 2 to 4 week intervals after felling. The mean stain ...
Dian-Qing Yang, R Beauregard
Proposals for further co-operative studies on determining toxic values against wood-destroying Basidiomycetes
1985 - IRG/WP 2237
Document IRC/WP/2194 reported the status of the programme of co-operative experiments up to and including December 1982. During discussions at IRG-13 in Turkey members endorsed the decision to complete the programme of tests and conduct repeat tests. At IRG-14 in Brisbane the report was noted but no further action agreed. At IRG-15 in Sweden a number of interested parties in the European/Scandinav...
A F Bravery
Reduction of preservatives leaching from wood by the application of animal proteins
2005 - IRG/WP 05-30387
The investigations consisted in the estimation of the effectiveness of protein borates and protein propionates in wood preservation against Coniophora puteana. The estimation was made on the basis of mass losses caused by the test fungus action against treated wood which was subjected to leaching with water. The investigations were performed for Scots pine wood (Pinus sylvestris L.) treated with p...
B Mazela, I Ratajczak, M Bartkowiak
The evaluation of the effectiveness of wood preservatives by means of IUFRO's method for field tests with wooden stakes
1985 - IRG/WP 3348
Pinus elliottii and Eucalyptus saligna stakes treated with CCA-A, CCA-C, CCB, Cashew Nut Shell Oil and Benzotar solutions were exposed in seven test sites in Sao Paulo State, Brazil. After five years of exposure, between oil-borne preservatives Benzotar show better performance than CNSL (cashew nut shell liquid), and within waterborne preservatives the performance of CCB is not so good as that of ...
G A C Lopez, A M F Oliveira, E S Lepage
Evaluation of the biocide diffusion from treated wood in indoor air. Bibliographic study
1990 - IRG/WP 3584
Within the frame of the risk assessment of the wood preservation products for the Health, the treated wood risk particularly when it is installed in dwellings becomes most important. The European directive "Building materials" (89/106/CEE) mentions the basic requirements with the buildings must comply. Annexe l states in particular that "the building must be conceived and built in order not to bec...
A Pichard
Leaching of active components from preservative-treated timber. Stages 2 & 3: Laboratory testing and comparison with semi-field testing
2004 - IRG/WP 04-20303
This part of the project is focussed on leaching from preservative-treated wood obtained by the laboratory test method CEN/OECD draft guideline, February 2003 ”OECD guideline for the testing of chemicals proposal for new guideline XXX. Estimation of Emissions from Preservative-treated Wood to the Environment: Laboratory Method for wood held in the storage yard after treatment and for wooden comm...
N Morsing, B Lindegaard
Current status of AAC preservatives in New Zealand
1980 - IRG/WP 3141
Two types of alkylammonium compounds (AAC) have been approved as commercially acceptable wood preservatives by the NZ Timber Preservation Authority (TPA). They are alkyldimethylbenzyl ammonium chloride and alkyldimethylamine acetate, both of which must contain either (a) 70% alkyl chains of C12 + C14 and less than 10% of any other individual chain length, or (b) 85% alkyl chains of C12 + C14 with ...
J A Butcher
A comment on problem orientated research for the preservation industry
1984 - IRG/WP 3303
Wood preservation is a technological discipline, based upon a number of fundamental sciences, including biology and chemistry. The International Research Group on Wood Preservation (IRG) is presently structured to support the preservation industry, since IRG working groups attempt to strike a balance between fundamental aspects and technological needs. Over the years there has been an increasing r...
H Greaves
European standardization for wood preservation
1991 - IRG/WP 2365
Since the last IRG 21 conference in New-Zealand, there one meeting of the plenary committee and several meetings of working groups. The interprative documents prepared by CCE for expliciting the essential requirements of the CCE Directive on the construction products and specially: mechanical resistance and stability / hygiene, health and environment / safety in use
are waited to valid the progra...
Anonymous
Synergistic combination of an antioxidant and wood preservative: a preliminary study
1998 - IRG/WP 98-30172
We previously proposed that extractives in highly durable angiosperm heartwood may protect wood against white-rot fungal colonization and subsequent degradation by a dual mechanism: extractives have some fungicidal activity and are also free radical scavengers (antioxidants) and thus interfere with the fungal free radical degradative mechanisms. We tested this hypothesis using the commercial bioci...
T Schultz, D D Nicholas, J Minn, K D McMurtrey, T H Fisher
An observation of seasoning, preservative treatment and storing of CCA treated 30 bangladeshi hardwood species for crossarms
1995 - IRG/WP 95-40058
Observed kiln seasoning, preservative pressure treatment and storing of CCA treated 30 Bangladeshi hardwood species for crossarms. It revealed that it was very difficult to kiln season and preservative pressure treatment of thirty species together in a single charge and found that when species of different specific gravity kiln season together there occur some objectionable seasoning degrades, and...
G N M Ilias, M D Rokib-ul-Hafiz
The high decay resistance in the sapwood of the naturally durable Malaysian hardwood Belian (Eusideroxylon zwageri)
2001 - IRG/WP 01-10410
It has long been assumed that the observed natural durability of the heartwood in certain timbers is perhaps associated with a relatively lower decay susceptibility also of the sapwood of these species. While the heartwood of Belian is reputedly highly decay resistant among the tropical hardwoods of Southeast Asia, laboratory decay tests reported in this paper have also confirmed the high decay re...
A A H Wong, A P Singh
A rearing procedure for the house longhorn beetle Hylotrupes bajulus L
1973 - IRG/WP 228
The technique practised at the Princes Risborough Laboratory for culturing Hylotrupes bajulus is described. It is modified from methods previously suggested by German workers. A protein and vitamin enriched wood diet to accelerate larval growth is employed and larvae are subsequently given a period of cool storage to induce pupation. Adults are confined in groups with prepared surfaces for egg lay...
R W Berry
Protection of buildings, other structures and materials in ground contact from attack by subterranean termites with a physical barrier - a fine mesh of high grade stainless stee
1993 - IRG/WP 93-10014
A new type of physical barrier for the prevention of attack by subterranean termites on buildings, other structures and materials in ground contact - a fine mesh of highalloy (originally 304, now 316) stainless steel - has recently been developed and patented worldwide by industry in Australia. The termite resistance of the material was assessed by CSIRO in laboratory and field trials. In the labo...
M Lenz, S Runko
Ponding of radiata pine (Pinus radiata) - 2. The effect of ponding on coating penetration into wood
1998 - IRG/WP 98-10249
Radiata pine (Pinus radiata) wood panels which had been ponded for periods ranging from 2 to 12 weeks, dried and subsequently coated with a primer and examined by light microscopy after staining sections with Sudan IV to enhance the contrast of the primer material.
A correlation between the extent of ponding and the extent of coating penetration into wood was observed. The coating penetration var...
A P Singh, S S Gallagher, U Schmitt, B S Dawson, Yoon Soo Kim
Regulation of hyphal sheath formation iron-chelator production by the brown rot fungi Gloeophyllum trabeum and Postia placenta
1994 - IRG/WP 94-10074
Hyphal sheath formation and iron-chelator production by liquid cultures of the brown rot fungi Gloeophyllum trabeum and Postia placenta were monitored over time. The effects of incubation at various temperatures, pH's and concentrations of iron, manganese and nitrogen were determined. Hyphal sheath production was observed microscopically and quantified with JAVA video analysis. The hyphal...
Y Chen, J Jellison
Time limits for holding logs to achieve successful antisapstain treatment
1997 - IRG/WP 97-30126
The purpose of these trials was to determine the maximum time that logs can be left in winter and summer before treatment if sapstain, caused by pre-treatment infection, was to be prevented. Pre-treatment storage conditions representative of average temperature and humidity for the winter months of June, July and August, and of moderately severe summer conditions, for the Bay of Plenty, New Zealan...
D R Eden, R N Wakeling, C M Chittenden, J G Van der Waals, B Carpenter