Your search resulted in 186 documents. Displaying 25 entries per page.
Field evaluation of anti-sapstain products
1987 - IRG/WP 3402
Product A based on methylenebisthiocyanate, product B based on methylenebisthiocyanate plus 2-thiocyanomethylthio-benzothiazole, product C based on 2-thiocyanomethilthio-benzothiazole and product D based on didecyl dimethil ammonium chloride plus 3-iodo-2 propynil butyl carbarnate were evaluated on Pinus radiata sawn timber as fungicides for sapstain and mould in the Sawmill Division of the Univer...
M C Rose, A Bedoya
Evaluation of the effectiveness of Tuff Brite C in the control of sapstain in laboratory and field tests
1992 - IRG/WP 92-3718
Since 1990, the anti-sapstain product Tuff Brite C (ASC 66898) has been evaluated internationally in laboratory and field tests, and has been commercially introduced in New Zealand. The product is an aqueous flowable formulation of chlorothalonil and carbendazim. Efficacy tests which have been carried out in New Zealand, Australia, USA, South Africa and Europe are described and summarized. Tuff Br...
T L Woods, C J Klaver
Performance of proprietary formulations of anti-sapstain preservatives on Hevea brasiliensis timbers in laboratory tests
1989 - IRG/WP 3532
A total of 10 proprietary and two experimental formulations were assessed for their effectiveness against sap-stain caused by Botryodiplodia theobromae on Rubberwood (Hevea brasiliensis). Sterilized wood samples 5x20x40 mm³ were dipped in the test chemicals for 60 seconds and then inoculated with 0.5 ml of culture filtrate of Botryodiplodia theobromae for incubation in sterile, damp petri dishes....
L T Hong
Laboratory evaluation of water repellents as antisapstain treatment additives
1986 - IRG/WP 3382
Water repellent formulations consisting of five paraffin wax emulsions, three polyethylene wax emulsions, two polybutadiene resin emulsions, a polyester emulsion, and a ß-pinene polymer emulsion were subjected to water repellency tests on radiata pine sapwood. With one exception, the parafin wax emulsions were more effective water repellents than the alternative formulations and one of the paraff...
D V Plackett, C M Chittenden
Influence of water-borne preservatives on water repellency and the impact of addition of water repellent additives
1992 - IRG/WP 92-3704
The primary goal of a desirable wood preservative system is to effectively control decay fungi and other biodeteriogens in service. The water repellent nature of a given system may play an important role in the protection of wood. In this study, the water repellency of several water-borne preservative systems has been evaluated by measurements of tangential swelling during immersion. The systems i...
L Jin, D M Roberts, A F Preston
Feeding response of field populations of Coptotermes species to softwood blocks treated with non-toxic water-proofing and anti-microbial products.
2003 - IRG/WP 03-10487
The feeding response of field populations of the subterranean termite, Coptotermes lacteus, to Pinus radiata wood blocks (50 x 40 x40 mm) treated with various combinations of non-toxic and odourless water-proofing materials based on natural high molecular weight esters (TimberTreatÒ) and a new water insoluble quaternary ammonium compound (‘anti-microbial’) is described. Treated wood blocks we...
J R J French, T Pynsent, M Susic
Anti-sapstain chemicals for diffusion treatment of rubber wood
1986 - IRG/WP 3367
Performance of Sinesto B and Akzo EN 494, two formulated products of alkyl ammonium compounds, was tested as fungicidal additive in the boron solution to control mould and stain during diffusion storage of rubber wood. Sinesto B at 2.0% (a.i.) concentration has given good control over mould and its protection against sapstain was only satisfactory. Akzo EN 494 at 0.7% (a.i.) concentration has give...
R Gnanaharan
A substantively bonded water repellent treatment based on chromium carboxylates
1985 - IRG/WP 3344
Chromium carboxylates soluble in toluene have been synthesised and applied to Scots pine (Pinus sylvestris) sapwood. Without any further treatment, the compounds may be readily leached from wood surfaces with toluene. After a period of heating however, they become fixed to the cell wall, substantial amounts being resistant to leaching even under reflux conditions for several hours. Treatment of wo...
J K Wright, W B Banks, W J Eilbeck
The risk assessment process. Point of view of a biocide manufacturer [Évaluation du risque. Point de vue d'un fabricant de biocide]
1990 - IRG/WP 3568
Risk assessment is an inherent part of our everyday lives. The risk assessment equation combines Hazards and Exposure. For the Wood Preservation Industry, the hazards may be characterised by the toxicity a the ecotoxicity of chemicals and the exposure by the identification of exposed people, of the exposure routes and exposure frequency. To quantify the exposure, good co-operation is required betw...
D Baur
A field trial to assess the potential of antisapstain chemicals for long-term protection of sawn radiata pine
1986 - IRG/WP 3375
Seven chemical formulations were tested as antisapstain treatments for freshly sawn radiata pine sapwood (90x50 mm²). Each formulation was used with and without a water-repellent additive and was sprayed on to 1 m long boards. The boards were then stacked into "mini" packets and stored unprotected from the weather for 6 months. Haipen 50w (at 0.2 or 0.4% active) and NaPCP (1% active) plus 1.5% bo...
J A Drysdale
"XYLOPHENE ANTI-TERMITES" :A complete range of treatment products against termites
2000 - IRG/WP 00-30230
Dyrup-Xylochimie purpose for several years efficient treatment products for timber and wood materials, with its trade mark : "Xylophèn". As everybody know, termites become an important problem for construction in France. So important that, a national law was voted in May 1999, to define areas where termites are present, in order to protect future landowner. To prevent efficiently termites damages...
L Cubizolles, E Wozniak
Methods of testing anti-stain chemicals for protecting sawn timber during storage and transport
1976 - IRG/WP 273
No international standard method for testing anti-stain chemicals for protecting fresh sawn timber exists. The methods used can be divided into three types: a) Rapid screening tests for finding chemicals effective against blue-stain and mould fungi. The chemicals are tested in agar medium, in pieces of filter paper or on small pieces of wood using pure cultures. b) Laboratory tests for evaluating ...
T Vihavainen
A new process for in situ polymerization of vinyl monomers in wood to delay boron leaching
1998 - IRG/WP 98-40110
Efforts were accelerated on effective use of boron compounds in wood preservation owing to their environmentally safe characteristics and relatively low costs in addition to their well-known high bioactivity and fire resistant properties. Although having these unique favorable properties, they are readily leachable from treated wood at humid conditions. Therefore, they had limited market for exter...
M K Yalinkilic, W Dwianto, Y Imamura, M Takahashi
Laboratory evaluation of anti-sapstain formulations
1989 - IRG/WP 3510
Four formulations were tested for their efficacy in controlling molds and sapstaining fungi on wood according to the Standard-II of Japan Wood Preserving Association (JWPA). Relative efficacy was compared on the basis of visual rating of the fungal growth on the treated and untreated wood surfaces when the wood specimens were exposed to each monoculture of 5 test fungi at 26±2°C and 70-80% for 4...
K Tsunoda
The effect of stack height on the performance of preservatives used for the prevention of sapstain on seasoning wood
1997 - IRG/WP 97-10192
The performance of three anti-sapstain preservatives was investigated under field conditions in south east England. The preservatives under test were: copper-8-quinolinolate (Mitrol PQ8) trimethylalkylammoniumchloride and sodium hexanoate (Sinesto B) and chlorothalonil (Tuff Brite). The preservatives were tested on Corsican Pine grown in south east England. The field trial was set up to investigat...
J R Williams, D J Dickinson, J F Webber
What is OECD doing to promote harmonization of biocide regulations
1999 - IRG/WP 99-20182
OECD began work on biocides in 1997 to help Member countries co-operate in the assessment and registration of these products. The work is a part of OECD's Pesticide Programme, and is co-ordinated by the Biocides Steering Group. The goal is to harmonize regulatory approaches to allow countries to conduct evaluations of biocides more efficiently. More efficient evaluations can advance the p...
M Paneli, N Grandy
Protection of pine sawtimber and sawn timber against blue stain in Poland
1983 - IRG/WP 3193
The purpose of this paper is the synthesis of more important results of basic and applied research that have been grouped in the following problems: 1.: Fungi causing blue stain in the pine wood, occurring in Poland. 2.: Moisture content changes of pine sawtimber and sawn timber as the factor of blue stain producing fungi development. 3.: Effect of sapwood moisture content on the degree of wood st...
E Tarocinski, M H Zielinski
Heat treatment of less-valuable Nigerian-grown Ceiba pentandra wood for improved properties
2006 - IRG/WP 06-40332
The hardwood Ceiba pentandra locally known as “ araba “ in Nigeria is rarely used for structural and construction works due to its high dimensional instability, low strength and durability values. Samples (10 x 10 x 150mm) were removed from four green boards (25 x 200 x 3000mm) of this species originating from a natural forest stand in Nigeria and subjected to 2-hour heat treatment at 160°C a...
L Awoyemi
Detection of Anti-Fungal Sapwood Extractives in Non-Durable Scots Pine (Pinus sylvestris), Rubberwood (Hevea brasiliensis) and Jelutong (Dyera costulata)
2007 - IRG/WP 07-10634
A general laboratory bioassay method of Woodward and Pearce (1985) was adopted to detect anti-fungal activity of sapwood or heartwood extractives of 5 Malaysian hardwoods [dark red meranti heartwood (Shorea spp.), red balau heartwood (Shorea spp.), kulim heartwood (Scorodocarpus borneensis), jelutong sapwood (Dyera costulata) and rubberwood sapwood (Hevea brasiliensis), including the temperate Pin...
A H H Wong, R B Pearce
Hydrophobic characteristics of pyrolysis oil
2008 - IRG/WP 08-30458
Hydrophobic behavior of pyrolysis oils obtained by pyrolysis of Scots pine wood (Pinus sylvestris L.) by using extruder type pyrolyzer at 450, 550 and 600 ºC was the objective of the study. Sapwood specimens (15×25×50 mm along the grain) were impregnated with the obtained pyrolysis oils by full- and empty cell treatment.
The results indicated that wood impregnated with the studied pyrolysis o...
A Temiz, M Hakki Alma, N Terziev
The effect of gamma radiation on selected wood properties
2008 - IRG/WP 08-40394
As an easy, fast, and effective sterilisation method, gamma irradiation changes molecular structures not only in pest’s living cells, but also in wooden cell walls. Radiation-induced depolymerisation causes significant changes in some properties of wood crucial for restoration and for laboratory testing of wood-preservative effectiveness. The influence of gamma radiation concerning total amount ...
R Despot, M Hasan, A O Rapp, C Brischke, C R Welzbacher
Preliminary investigation of biological resistance, water absorption and swelling of thermally compressed pine wood panels
2008 - IRG/WP 08-40396
Wood can be modified by compressive, thermal and chemical treatments. Compression of wood under thermal conditions is resulted in densification of wood. This study evaluated decay and termite resistance of thermally compressed pine wood panels at either 5 or 7 MPa and at either 120 or 150?C for one hour. The process caused increases in density and decreases in thickness of the panels; however, lab...
Ö Ünsal, S N Kartal, Z Candan, R Arango, C A Clausen, F Green III
Thermal treatment of Nigerian-grown Albizzia zygia and Funtumia elastica wood in soy oil medium.
2008 - IRG/WP 08-40413
Thermal treatment in soy oil medium is one of the techniques used as a substitute to the chemical treatment in wood preservation. However, the effects of this technique vary from one species to another and hence the need to investigate the response of individual species to it. Thermal treatment of air-dried Nigerian-grown Albizzia zygia and Funtumia elastica wood was carried out in a vessel contai...
L Awoyemi
Vacuum drying of European oakwood: Color, chemistry and anti-oxidant potency of wood. Improving appearance in forest value added products
2008 - IRG/WP 08-40432
In hardwoods used for decorative and appearance purposes, wood colour is one of the most important factors of wood quality; in addition colour is related with durability and biological decay of wood. Wood discolouration during drying is mainly affected by heat, light, physiological reactions, combinations of reactions, biochemical and chemical reactions, and micro-organisms attack. In freshly fell...
S Sandoval, W Jomaa, F Marc, J-R Puiggali
Dimensional Stability of Nine Tropical Hardwoods from Cameroon
2009 - IRG/WP 09-10687
This study investigated the swelling behavior, rate of swelling and dimensional stability of nine tropical hardwood species from Cameroon, namely ayous (T. scleroxylon), bilinga (N. diderrichii), bubinga (G. tessmannii), iroko (C. excelsa), Makore (M. heckelii), moabi (B. toxisperma), movingui (D. benthamianus), teak (T. grandis) and zingana (M. brazzavillensis). Continuous swelling was monitored ...
S R Shukla, D P Kamdem