Your search resulted in 3385 documents. Displaying 25 entries per page.
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
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
Biological detoxification of wood treated with salt preservatives
1992 - IRG/WP 92-3717
The use of microorganisms that are capable to convert chemically fixed inorganic preservative complexes from impregnated wood waste into watersoluble components is investigated. A number of fungi were isolated from deteriorated and initially well-treated wood. They revealed an exceptionally high production of organic acids (pH 2). The fungi were identified and used together with others of the same...
I Stephan, R-D Peek
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
Effects of two wood preservatives and one water repellant on the settlement of fouling communities in a tropical marine environment
2002 - IRG/WP 02-30293
Observations made on recruitment of fouling organisms on treated panels exposed at an Indian harbour, Krishnapatnam on the east coast (Lat: 13028’ to 13059’ N; Long: 80010’ to 80016’ E) during November, 1997 to October, 1999 are reported and compared with fouling communities on control panels. Wooden panels of Erythrina variegata, Paraserianthus falcataria, Tetrameles nudiflora an...
B Tarakanadha, K S Rao
Wood preservation in Portugal
1985 - IRG/WP 3325
This report deals with the forest potential of Portugal and its timber industry and outlines the evolution of wood preservation in the country. The main hazards to timber in service are noted and the timbers used classified according to their natural durability and treatability. The wood preservatives used are detailed with estimates of the total consumption of the different types. Addresses are l...
D De Sousa Castro Reimão, R Cockcroft
Natural durability, density and extractive contents of 42 wood species of Bangladesh.
2003 - IRG/WP 03-10490
Natural durability, density and major extractive contents of 42 lesser used or unused wood species of Bangladesh have been studied. Correlation analysis between these properties has been performed. It has been shown that natural durability of these species neither explained by water soluble nor by alcohol benzene extractive contents. Density has a weak but significant positive correlation with dur...
S Akhter, K Akhter, S C Das
Resistance of various wood species against decay by Coniophora cerebella (Pers) Duby and Lenzites trabea (Pers) Bres
1976 - IRG/WP 142
Both fungi, Coniophora cerebella and Lenzites trabea, are important destroyers of timber. Coniophora often occurs inside buildings and Lenzites trabea has been observed on southern facades of buildings, on balconies and window frames. In most instances that we investigated coniferous timber had been decayed. But both species are known to attack also various hardwoods. For this reason tests similar...
O Wälchli
Pentachlorophenol, its salts and esters; UK review of its uses in wood preservation and surface biocides
1995 - IRG/WP 95-50040-27
The review on pentachlorophenol was undertaken by the Health and Safety Executive on behalf of the independent Advisory Committee on Pesticides in response to the 9th Amendment to the Marketing and Use Directive. The high toxicity to man and the environment was noted and the associated risks were assessed. The Cornmittee concluded that the potential carcinogenicity was probably via a non-genotoxic...
M Fitzpatrick, C Mackie
An evaluation of chemical pre-treatments for controlling kiln brown stain in radiata pine
1997 - IRG/WP 97-30124
Clear radiata pine (Pinus radiata D. Don) is widely used for fine millwork owing to its attractive light colour. However, kiln drying of radiata pine sapwood often results in the development of a brown stain causing substantial loss in revenues in New Zealand's high-value export markets. In this study chemical pre-treatments were evaluated for their ability to control the formation of kil...
B Kreber, A McDonald
Comparative studies on the species effects of wood preservatives
1989 - IRG/WP 3521
For the examination of the resistance against fungal attack, wood blocks of 3 softwood species were treated with CCA (type 3), CFK, AAC and IF-1000 independently. The wood blocks were exposed to the fungal decay with Tyromyces palustris. The degradation of the wood blocks treated with these preservatives was quite widely different among wood species examined in this study. Hem-fir treated with CCA...
K Yamamoto, S Matsuoka
Wood preservation in Australia
1984 - IRG/WP 3316
Wood preservation in Australia is presented as an integral part of the forest products industry. The history of its development, as well as its current status and activities are described. Preservation operations in Australia are broadly based, and the industry diversified to combat a wide range of hazards, and to utilise many wood species, for differing end-uses. The Timber Preservers’ Associat...
H Greaves
Silafluofen, a new insecticide against wood-boring insects and termites
1991 - IRG/WP 3666
Hoe 084498 (proposed common name: Silafluofen) is a new insecticidal compound from Hoechst Aktiengeesellschaft and has been extensively tested to determine its potential use as an insecticide against wood-boring insects and soil termites. Various tests in official institutes indicate a good activity against several wood-boring insects and soil termites. The active ingredient is resistant to weathe...
G Rustenburg, C J Klaver
Preservative ability of wood to be fixed hydroxyl apatite substituted for antimicrobial metals
2001 - IRG/WP 01-30272
We succeeded in forming hydroxy apatite (HAp) in wood. HAp is non-toxicity and safe. Preservative ability of the wood, which substituted one part of Ca of constituent element of this HA p for antibacterial metals was measured. When Ca was substituted for Ag or Zn, mass loss in decay by brown-rot fungus F. palustris was restrained in about 50% (Ag) ~30% (Zn) of value of control specimen. However, w...
Y Haruhiko, I Sumaru
Adsorption of ACQ and CuMEA Wood Preservatives in Red pine
2005 - IRG/WP 05-30374
The rates of stabilization or fixation of ACQ subcomponents (CuO, DDAC and MEA) in red pine (Pinus resinosa) were compared for different solution concentrations (0.75%, 1.5%, 2.25% and 3% ACQ-D) and post treatment conditioning temperatures. Preservative solutions were impregnated into red pine sapwood by a full-cell treatment. Copper and MEA adsorptions from copper monoethanolamine solutions witho...
C Tascioglu, P A Cooper, Y T Ung
Some recent studies on the marine wood-borers of the west coast of India
1982 - IRG/WP 486
Occurrence and distribution of marine wood-borers along the west coast of India from Mangalore to Kandla are presented together with the distribution pattern of all the molluscan and crustacean wood-borers so far reported from India coasts. The survey, conducted for the first time along this coast, revealed the presence of 14 species of Teredinidae, 2 species of Pholadidae, 3 species and one varie...
L N Santhakumaran
X-ray photoelectron spectroscopic analysis of CCA treated wood
1992 - IRG/WP 92-3700
Ponderosa pine and Douglas-fir wood sections were treated with CCA preservative. To elucidate the mechanism of fixation of the CCA, the wood surface was analyzed by X-ray photoelectron spectroscopy (XPS). CCA treatment increased C1 (carbon bonded to carbon and/or hydrogen) and decreased C2 (carbon bonded to one oxygen) in XPS C1s spectra, both in unextracted and pre-extracted sections. This sugges...
J N R Ruddick, K Yamamoto, P C Wong, K A R Mitchell
Bacterial brown stain on sawn timber cut from water-stored logs
1992 - IRG/WP 92-1532
Brown stains which appear on the surface of sawn radiata pine cut from water-stored logs were identified as tannin-like compounds. They are derived from bacterial breakdown of flavanoid-glucosides. When timber is sawn from infected logs, the free flavanoids migrate to the wood surface as the timber dries. There, they condense and oxidise to form permanent brown discolourations. Stains occurred on ...
M E Hedley, R Meder
Lignicolous marine fungi from panels of different timbers exposed along Goa coast (India)
1993 - IRG/WP 93-10037
Colonisation by marine fungi on panels of thirty species of Indian timbers, ten species of imported timbers, marine plywood (coated with polyurethane as well as uncoated) and also on panels of five timber species treated with Copper-Chrome-Arsenic (CCA) and Copper-Chrome-Boric (CCB) preservatives, was studied by exposing test blocks in the Mandovi estuary, Goa (West coast of India) for periods ran...
L N Santhakumaran, S Chinnaraj, S G Sawant
Application of a novel strength evaluation technique during screening of wood preservatives
1986 - IRG/WP 2262
The effectiveness of CCA and ACA in treated aspen mini stakes tested using a novel bag procedure, with unsterile soil fortified with Chaetomium globosum and Ceratocystis albida, is reported. Good agreement between toxic limits determined using the standard weight loss procedure, and those determined by the strength technique were found, with some indication that the strength loss method is more se...
J N R Ruddick
Environmental risk assessment of treated wood - A mesocosm study
2005 - IRG/WP 05-50224-8
In order to evaluate the environmental impact of treated poles, we have developed physical models (mesocosms) containing around 250 kg of natural soil and a treated pole.
On the top of each mesocosm, a spraying mechanism, which can distribute ultrapure water through several nozzles, was built.
On the lower part of each mesocosm, a small tank, which can contain some litres of leachate, was placed...
P Marchal, F Poly
The effect of wood preservatives on the relation between the electric resistance and moisture content in scots pine (Pinus sylvestris L.) sapwood
1998 - IRG/WP 98-20142
The effect of two types wood preservatives (TBTO and CuHDO) on moisture content measurements with an electric resistance meter in pine sapwood is assessed. High and low concentration impregnated pine sapwood is climatized at different relative humidities. Once climatized the samples are weighed and the moisture content is measured with an electric resistance meter by fixed stainless steel, isolate...
B W Holleboom, W J Homan