Your search resulted in 3223 documents. Displaying 25 entries per page.
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
The mechanism of leaching of copper-chrome-arsenic preservatives from treated timber in saline waters
1976 - IRG/WP 374
A mechanism for the leaching of copper-chrome-arsenic preservatives is proposed on the basis of theoretical calculations and experimental studies using timber subjected to a range of water types of different ionic compositions. Complex formation by copper (II) and chromium (III) with chloride and hydroxide ions is shown to affect the leaching rate. Of even greater importance is the salt effect on ...
J Irvine, S-E Dahlgren
Respiratory response of the wood boring teredinid, Lyrodus pedicellatus (Quatrefages) to copper stress
2004 - IRG/WP 04-10528
Wood boring teredinid molluscs engulf most of the wooden particles scrapped by them while actively boring into wood, obtaining nourishment for their metabolic activities. In order to protect the wooden structures from the biodeteriorating activity of such organisms, the wood is treated with different chemical formulations to prolong their service life. Copper chrome arsenic (CCA) is one such woo...
V Kuppusamy, M Balaji, M V Rao, K S Rao
IRG/COIPM INTERNATIONAL MARINE TEST - to determine the effect of timber substrate on the effectiveness of water-borne salt preservatives in sea-water. Progress Report 21: Report of eighth inspection (7 years) in Australia
1985 - IRG/WP 4119
This report tabulates the seven year (86 month) inspection results, obtained on 28 Fabruary l985, of the IRG/COIPM International Marine Test at Goat Island, Australia. This test was installed in December 1977. The results are given in Tables 1-6. Table 7 lists the number of marine borers identified from blocks (2 cm and 6 cm long respectively) cut from the ends of specimens removed at the previous...
L J Cookson, J E Barnacle
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
A study of the colonization of wood blocks in a laboratory unsterile soil test
1988 - IRG/WP 2318
CCA treated and untreated beech blocks were exposed to a defined horticultural loam using the method proposed for the collaborative soft rot test in the soft rot sub-group of Working Group Two. At intervals during the incubation wood samples were removed and fungal isolations were made using selective media. Fungi were identified and tested for their cellulolytic ability and their decay capacity i...
M T De Troya, S M Gray, D J Dickinson
Detection of Termite Attack to Wood Stakes in a Monitoring Station Using Ceramic Gas Sensors and Acoustic Emission (AE) Sensor
2003 - IRG/WP 03-20271
To evaluate the termite activity in monitoring stations non-destructively, metabolic gas from termites and acoustic emission generated by feeding of termites were measured. Ten cylindrical stations with small wood stakes of Japanese red pine (Pinus densiflora) were buried around a house attacked by Coptotermes formosanus SHIRAKI. A sample air in the station was collected by sucking through a drill...
Y Yanase, Y Fujii, S Okumura, T Yoshimura, Y Imamura, T Maekawa, K Suzuki
Natural resistance of Bamboo (Bambusa sp.) to marine wood-borers in Goa waters (India)
1993 - IRG/WP 93-10032
The paper deals with the natural durability of Bambusa sp. against the attack of marine wood-borers in Goa waters. Test specimens of this species were completely destroyed within a short period of nine months due to severe attack of borers indicating its very low natural resistance. Wood-borers involved were Martesia striata (Linnaeus), Nausitora hedleyi Schepman and Lyrodus pedicellatus (Quatrefa...
L N Santhakumaran, S G Sawant
Raising of the grain and deformation of Scots pine (Pinus sylvestris) treated with water-borne preservatives
1987 - IRG/WP 3456
In Sweden partial impregnation to 10 mm depth of the pine sapwood (class B in the Nordic preservation standard) of joineries was introduced during the seventies. To avoid product quality problems, organic solvent-based systems have been used. However, the Swedish industry today has problems with organic solvents, mainly for environmental reasons. We have studied raising of the grain and deformatio...
G Hägglund, T Sebring
Discoloration of pressure impregnated wood caused by Amorphotheca resinae
1990 - IRG/WP 1438
Amorphotheca resinae Parbery with the anamorph Cladosporium resinae (Lindau) von Arx & de Vries is a cosmopolitan fungus known from aviation kerosene, hydrocarbon contaminated soil and creosoted timbers. In Denmark it causes heavy discoloration on wood treated with waterborne chromate-containing preservatives e.g. CCA-oxide type. The teleomorph produces small spherical fruitbodies widespread o...
F Rune, A P Koch
Information regarding a report on the "Code of Good Practice" for the use of chlorophenoxides for wood preservation
1984 - IRG/WP 3302
In 1981 the British Columbia Chlorophenate Wood Protection Task Force was formed to respond to workers' health and environmental concerns regarding the use of chlorophenoxides for control of sapstain and mould fungi at sawmills and lumber export terminals. The task force consisted of representatives of both the federal government (Environment Canada) and the provincial government (British...
V N P Mathur
Relationship of wood durability and extractives
2003 - IRG/WP 03-10493
The durability of the following five wood species, Zelkova carpinifolia, Ulmus glabra, Pterocarya fraxinifolia, Carpinius betulus and Acer laetum, were studied. Wood blocks were exposed to Coriolus versicolor under laboratory conditions according to DIN 52176 standard. After 16 weeks incubation the heart wood of Z carpinifolia showed 2,19 % weight loss, U glabra 41,69 %, C betulus 45,64 %, A laetu...
S M Kazemi
Contribution to the knowledge of wood-rotting fungi in Brazil. Part 1: Occurrence and distribution of fungi on different substrates from the Manaus region, Amazonas State
1995 - IRG/WP 95-10096
A total of 945 spezimens of fungi were studied with regard to their distribution on ditterent substrates, abundances and economic importance. The samples came from the collection ot the Wood Pathology Laboratory of CPPF/INPA in Manaus, Brazil. Altogether, 163 spezies and 87 genera were identified. The following genera Trametes, Auricularia, Panus, Rigidoporus and Hymenochaete were represently by m...
M Aparecida de Jesus
Copper storage in the digestive caecae of Limnoria tripunctata and Limnoria quadripunctata (Crustacea: Isopoda) tunnelling in CCA treated and untreated wood in laboratory cultures
1998 - IRG/WP 98-10257
Digestive tract tissues of Limnoria quadripunctata Holthuis and Limnoria tripunctata Menzies, tunnelling untreated and CCA treated Scot's pine sapwood under laboratory conditions were examined using X-ray microanalysis and transmission electron microscopy. Populations of both Limnoria species tunnelling treated and untreated wood stored copper within their digestive caecae in the form of ...
C Wykes, A J Pitman, S M Cragg
Preservative-efficacy of boric acid-triethanol amine solution against wood-decay fungi
1994 - IRG/WP 94-30050
Laboratory preservative-efficacy tests were conducted using boric acid-triethanol amine (BTEA) solution in accordance with the JIS A 9201 (1991) test method excluding the standard weathering process. Sapwood specimens of Picea jezoensis or Fagus crenata to achieve nominal retentions of 0.40-41.2 kg/m³ of boric acid were exposed to Tyromyces palustris, Coriolus versicolor, Serpula lacrymans or Cha...
S Doi, M Mori, Y Mineki
Reinfestation of consolidated ancient wood by insects
1998 - IRG/WP 98-10290
Wooden artifacts are often attacked by wood-destroying insects. Therefore conservators have to stabilize numerous objects from such attack. Initially we studied the resistance of painting materials and consolidants on unaffected recent wood against wood-destroying insects (IRG/WP 97-10239). Further, we wanted an answer to the question: Are artifacts, formerly destroyed by wood-borers, reinfested b...
W Unger, A Unger, U Schiessl
Effect of boron compounds-furfuryl alcohol treatment of wood on dimensional stability, termite resistance and boron leachability
2001 - IRG/WP 01-40195
Sapwood blocks of Japanese cedar (Cryptomeria japonica) and Caribbean pitch pine (Pinus caribaea) measuring 20 (tangential) x 20 (radial) x 10 (longitudinal) mm were impregnated with furfuryl alcohol (FFA) by a vacuum-diffusion process followed by curing under heating. Boron compounds (boric acid, ammonium borate and ammonium biborate) were mixed in the impregnation solution of FFA. Anti- swelling...
S K Ozaki, M K Yalinkilic, Y Imamura, M F Souza
A comparison of effectiveness of three waterborne preservatives against decay fungi in underground mines- An appraisal
2005 - IRG/WP 05-30366
To understand the effectiveness of waterborne preservatives and to explore the behaviour of roof supporting poles after pressure treatment, an experiment was conducted and thorough investigation was carried out during the last decade in the underground mines. Prior to commencement of the experiment, a survey was conducted at different depths in underground mines and collected decayed wood samples ...
P Narayanappa
Termite and fungal resistance of in situ polymerized tributyltin acrylate and acetylated Indonesian and USA wood
2000 - IRG/WP 00-30219
Wood [Indonesian pine (IP), Indonesian Jabon (IJ) and USA southern yellow pine (USP)] was either in situ polymerized with tributyltin acrylate (TBTA) or acetylated and then exposed to termite and fungal degradation both in laboratory tests and field exposure. The TBTA woods had an average weight percent gain (WPG) of 11% for IP, 12% for IJ, and 10% for USP. The acetylated woods had a WPG of 15-27%...
R E Ibach, Y S Hadi, D Nandika, S Yusuf, Y Indrayani