Your search resulted in 91 documents. Displaying 25 entries per page.
Bibliographie sur les produits organiques en solvant pour la préservation du bois
1972 - IRG/WP 313
Le présent travail exécuté dans le cadre do la Section III du Groupe International de la Préservation du bois a pour but de rassembler, en vue d'éventuelles études plus approfondies sur le sujet ou sur l'un de ses aspects, les principales et relativement récentes références sur les produits de protection des bois en solvant, souvent appelés, et parfois improprement, pro...
H Alliot
Improvement in dimensional stability against water of the main Spanish timbers impregnated with water repellent organic protectors
1988 - IRG/WP 3468
The study reported the increase of dimensional stability against water of the main Spanish timbers, both broadleaved and coniferous, after impregnation in the autoclave with organic protector, with contains 33.3% water repellent waxes and resins. The proposed Spanish standard, U.N.E. n° 56541 is used, where dimensional stability of the impregnated wood is expressed as a% of that of the non-impreg...
J A Rodríguez Barreal
Analysis of volatile organic compounds (VOC's) from Trichoderma spp.: effect of media composition on VOC production and level of inhibition of wood decay fungi
1997 - IRG/WP 97-10207
Production of volatile organic compounds (VOC's) by two Trichoderma isolates grown on either malt extract or minimal media was examined and statistically assessed to identify which VOC's were predominantly produced on each of the two media types. The VOC's were captured onto chromatographic absorbent from above the cultures of the fungi before being analysed by integrate...
A Bruce, R E Wheatley, C Hackett, A Kundzewicz
Environmentally benign wood preservatives based on organic biocide antioxidant combinations: A brief review of laboratory and field exposure results and discussion of a proposed mechanism
2004 - IRG/WP 04-30335
The combination of various organic biocides with commercial antioxidants generally increased the biocides’ efficacy 2-3 fold against wood-destroying fungi in short-term laboratory decay tests, and some positive results have been obtained after 2-4 years of outdoor exposure. The two antioxidants principally examined, propyl gallate and butylated hydroxytoluene, are low cost and, since both are f...
T Schultz, D D Nicholas, W Henry, C Pittman, D Wipf, B Goodell
The detection of organic solvent preservatives in wood by thin-layer chromatography
1975 - IRG/WP 357
A simple and rapid method for the detection of common organic solvent wood preservative materials is described. The method uses thin-layer chromatography after leaching of the preservative from sections of timber with chloroform. RF values and the sensitivity of the method are discussed and a routine procedure for identification of the organic and organometallic preservatives is proposed. Methods ...
B G Henshaw, J W W Morgan, N Williams
The use of light organic solvents in industrial wood preservation - an environmental perspective
1995 - IRG/WP 95-50040-22
The paper examines the evolving regulatory environment concerning the use of hydrocarbon solvents in industry and, in particular, the European wood preserving sector. The implications of the proposed EU Directive on industrial solvent use are explained and possible responses to such regulation examined, including process modification, product changes and emission abatement, where necessary. The de...
G A Ewbank
Animal blood protein as a component of new, non-toxic wood preservatives fixing organic active compounds in wood
2003 - IRG/WP 03-30312
Application of natural organic compounds and simple physico-chemical treatments in wood conservation has, as its objective, not only its protection against biological agents but, equally importantly, protection of natural environment by gradual abandonment of toxic constituents still applied commonly on a wide scale. The introduction into wood of new, non-toxic impregnation agents manufactured on ...
B Mazela, I Polus
A new preservative - A double-edged sword
1990 - IRG/WP 3573
Increasing environmental pressures on the use of pesticides throughout the world will impact more on the use of all wood preservatives. In particular the use of traditional wood preservatives and methods of application are under close scrutiny. The industry is responding to the challenge of developing alternative products and systems but faces great problems due to the excellent performance and sa...
M Connell, J A Cornfield, G R Williams
Future insecticidal treatments for wood products
1980 - IRG/WP 3140
Protective measures involving chemical treatment of wood use only a narrow range of toxic materials which are divisible into two groups, (i) those that are water-soluble, (ii) those that are soluble only in organic solvents. It is generally true to say that, as far as protection against insects is concerned, the former are stomach poisons while the latter are largely (though not exclusively) conta...
D J Cross
Environmental characterisation of retification process by-products (liquid and gaseous wastes)
2005 - IRG/WP 05-50224-10
In order to reduce environmental risks during the service life of the treated wood and to find new alternative developments on the durability of wood, some research and technology development have been made on thermal treatment. The retification process is one of these processes. The retification process induces chemical modification of the lignin and cellulosic components and modifies the intrins...
G Labat, E Bucket, S Legay, C Yriex, P Marchal, E Raphalen, M Vernois, R Guyonnet, H Besset, E Fredon), G Vilarem, L Rigal, C Raynaud
Detoxification of salt impregnated wood by organic acids in a pulping process
1993 - IRG/WP 93-50012
The paper descibes a novel method to detoxify pine wood (Pinus silvestris L.) treated with CCB-, CCF- CC-, and Cu-HDO-type salt preservatives. In the process of biological detoxification organic acids produced by strains of Antrodia vaillantii and other brown rot fungi are used for the dissolution of the previously fixed inorganic compounds. These findings are the basis for applying an acid pulpin...
I Stephan, H H Nimz, R D Peek
Influence of the content of organic matter of soil on the degradation of wood by soft rot fungi
1970 - IRG/WP 27
The degradation of wood specimen burried in the soil by soft rot fungi is influenced by a number of factors. These are in particular the water holding capacity, water content, content of organic matter, pH, content of mineral nutritive substances etc. The results of the interlaboratory tests, carried out within the IRG/WP let presume that the intensity of wood degradation occurs proportionally inv...
O Wälchli
Application of paint primers after light organic solvent preservative treatment
1986 - IRG/WP 3381
The application of three alternative paint primers is investigated, including a slow-drying oil-based primer, a fast-drying oil-based primer, and a fast-drying water-based primer. The treatment schedules employed, in particular the evacuation period after treatment, have a marked effect on subsequent paintability. Priming can potentially be carried out immediately after treatment with approved Tim...
P Vinden
The use of organic wood preservatives in ground contact and the suitability of laboratory test procedures to determine their efficacy
1999 - IRG/WP 99-20175
Organic fungicides, such as propiconazole, have proven to be highly effective when used as a co-biocide in recently developed wood preservative formulations. They have however been ineffective when used as a stand alone preservative, particularly when used in ground contact (European Hazard class 4). Previous research, using the test methods of ENV 807 (1993), provided conflicting evidence regardi...
I J Herring, D J Dickinson
New method to find out the volatile organic compounds (VOC) of wooden material
2000 - IRG/WP 00-20189
Volatile organic compounds (VOC) of pine, spruce and larch wood were studied using a new technique developed at VTT Chemical Technology. 50 mg of crushed wood material was placed into glass tubes. The tubes were closed with a glass wool, which is pressed with a tube cap. Wood samples were analysed with a gas chromatograph after thermal desorption using four different temperatures (50°C, 100°C, 1...
H Viitanen, K Villberg, K Saarela
Diazenes and some organic complexes of boron as potential fungicides for preservation of wood
1999 - IRG/WP 99-30197
Screening for fungicidal activity represents the first step in searching for new active components with enhanced environmental profile in comparison with traditional wood preservatives. Diazenes, their salts, and the salts of the corresponding semicarbazides, as well as several complexes of boron, were screened for fungicidal activity against wood decay fungi Trametes versicolor, Coniophora putean...
M Petric, B Paradiz, J Stern, F Pohleven, S Polanc, B Stefane, R Lenarsic
Alkyl dimethyl benzyl ammonium chloride: toxicity to Coniophora puteana when formulated in water and organic solvent
1986 - IRG/WP 2250
Results from agar block tests using Coniophora puteana demonstrate that the biological activity of alkyl dimethyl benzyl ammonium chloride is affected by the nature of the carrier solvent in which it is applied. In contrast to some earlier work, an alkyl ammonium compound in organic solvent formulation was identified that had significantly greater activity than its aqueous equivalent. A simple sol...
D P Blow
Efficacy of a novel copper-based organic solvent preservative in laboratory and fungus cellar tests
1995 - IRG/WP 95-30071
The efficacy of Chemicca 4, a novel copper-based organic solvent preservative, was compared with that of other LOSP in pure culture laboratory decay tests and with that of CCA and TBTO in a fungus cellar exposure. It was markedly superior to copper and zinc naphthenates at equivalent metal retentions in laboratory decay tests, and similar in activity to TBTO. After 60 months' fungus cella...
M E Hedley, P N Maynard
The bacterial transformation of organic biocides; a common mechanism?
2006 - IRG/WP 06-10585
It was found that a number of unformulated organic biocides showed a susceptibility to degradation by proteobacteria. Exposure of tebuconazole, a candidate biocide, chlorothalonil and IPBC to a Ralstonia strain was found to result in biocide detoxification, as demonstrated through HPLC and a bioassay. Exposure of the biocides to a previously identified extracellular factor was also found to resu...
D F Wallace, D J Dickinson
Measuring Soil Respiration as a New Approach to Describe the Interaction Between Wood (Treated and Untreated) and Microbiologically Active Soil
2006 - IRG/WP 06-20344
Soil respirometry was employed to examine the relationship between both the performance of copper organic preservatives in contact with and the amount of carbon dioxide evolved from soil and the effect of wood treated with preservatives on carbon turnover in soil. Wood was treated with a range of copper organic preservatives intended for use in ground contact as well as an organic preservative in...
I Stephan, W Mierke
Ionic liquids with organic and inorganic anions as highly active wood preservatives
2006 - IRG/WP 06-30411
Quaternary ammonium tetrafluoroborates, nitrates(V), propionates, acetates and formates with alkoxymethyl substituents were prepared and tested on wood destroying and sapstaining fungi. These new compounds are ionic liquids (ILs), which penetrate very well into Scot pine wood. Alkoxymethyldecyldimethylammonium tetrafluoroborates and nitrates(V) show better microbial activity against Coniophor...
J Zabielska-Matejuk, A Skrzypczak
Degradation of polychlorinated organic biocides by the wood decaying fungi
2008 - IRG/WP 08-50253
Organochlorine biocides such as lindane, pentachlorophenol sodium salt, and polychlorinated biphenyl 153 have been widely used as wood preservatives. Due to their low degradability by soil bacteria, treated waste wood products pose a serious threat to the environment. Consequently, there is an increased need for development of new strategies for their detoxification. In this work, the bioremediati...
I Vidic, L Zupancic-Kralj, K Sepcic, F Pohleven
Durability and fungal colonisation patterns in wood samples after six years in soil contact evaluated with qPCR, microscopy, TGA, chitin- and ergosterol assays
2009 - IRG/WP 09-20402
There is a need to establish new objective and sensitive methods for early detection and quantification of decay fungi in wood materials. Molecular methods have proven to be a useful tool within wood protection issues, however, this field is still poorly explored and so far relatively few have used these methods within the field of wood deterioration. Among the techniques used in the indirect quan...
A Pilgård, G Alfredsen, I Børja, C Björdal
Evaluation of Water Repellency of Treated Wood Using Several Alternative Methods
2009 - IRG/WP 09-20419
In this study, the results of water repellency testing using a digital swellometer method for water-borne organic-preservative systems with water repellent additives are reported. The findings suggest that the traditional method of using matched untreated controls as a reference developed from historic solvent-based treatments for determination anti-swelling efficacy (ASE) may underestimate the a...
L Jin, A F Preston
Mold-resistance Effect of Bamboo Wood Treated with CCC-organic Complexes
2009 - IRG/WP 09-30514
Mold resistant effect of CCA, ACQ, CuAz, CCC and the compound of CCC and propiconazole were researched on bamboo wood of Phyllostachys pubescens were reported in this paper. Results showed that all of the test fungicides could protect bamboo wood better from Penicillam citrinum than from Trichoderma viride and Aspergillus niger. The complex of CCC and propiconazole had the best resisting effect on...
Sun Fangli, Yang Le, Chen Anliang, Bao Binfu, Li Qiao