Your search resulted in 792 documents. Displaying 25 entries per page.
Evaluation of bending strength by non-destructive methods of Ezomatzu with white pocket rot
1991 - IRG/WP 2371
The possibility of application of three non-destructive methods was examined for evaluation of bending strength of ezomatsu (Picea jezoensis CARR.) with white pocket rot. As non-destructive methods, the measurements of ultrasonic wave propagation time, impact-induced stress wave propagation time and penetration depth of pin of "PILODYN Wood Tester" were applied to compare with visual evaluation of...
T Tanaka
Development of a mini-block test method for the rapid evaluation of preservative performance against Basidiomycte fungi
1991 - IRG/WP 2379
Screening procedures for new biocides used as wood preservatives can be a time consuming process using conventional Basidiomycete assay procedures. This is due mainly to the long exposure periods required to achieve adequate levels of decay (weight loss) in the test blocks. A number of alternative methods have been developed but most utilise artificial substrates such as filter paper or agar in wh...
J Brown, S Caswell, G R Williams
Chemical and biological investigations of double-vacuum treated windows after 5 years in service
1983 - IRG/WP 3219
In 1980 The Swedish Wood Preservation Institute initiated an investigation to study the degradation of TBTO and possible fungal attack in double-vacuum treated window joinery in service during 5 years. A hospital in Gothenburg was chosen that was built during 1969 to 1976. Both untreated and double-vacuum treated windows of Pinus sylvestris were used. A brown alkyl oil type paint (Nordsjö system ...
J Jermer, M-L Edlund, B Henningsson, W Hintze, S V Ohlsson
Preliminary results from the field experiment to determine the performance of preservative treated hardwoods with particular reference to soft rot. The four reference timber
1980 - IRG/WP 3164
The results given in the Tables 1-4 each refer to one of the four reference species treated with four solution concentrations of CCA as recorded from each test site. The species are: Alstonia scholaris, Betula pendula, Fagus sylvatica, Pinus sylvestris. The treatments were: Untreated, 0.66% CCA, 1.53% CCA, 3.01% CCA, 5.60% CCA. Each figure is an average of the ratings recorded for each replicate o...
J F Levy, D J Dickinson
Evaluation of polymeric alkylphenol polysulfide as a new wood preservative compound
2000 - IRG/WP 00-30251
At the 30 th IRG meeting held in Rosenheim, Bavaria, Germany, we reported on a Polymeric Alkylphenol Polysulfide (PXTS) which shows potential as a new non-leachable, environmentally compatible wood preservative compound exhibiting excellent biocidal efficacy. Comparative soil-block test results showed that PXTS was twice as effective as Creosote when evaluated against both white- and brown-rot fun...
J Goswami, A Abramson, R Buff, D D Nicholas
Hardwood Field Experiment: Progress Report 1977-1986
1986 - IRG/WP 3391
The international hardwood field experiment was planned in l976 and set up in same 30 different sites around the world. The test stakes include 4 reference species common to each site and in most cases at least 2 species of local importance. It was hoped that a picture of performance of a range of economically important species would be built up and at the same time provide vital background inform...
D J Dickinson, S M Gray
The new method of detecting decay in poles
1984 - IRG/WP 2229
In 1982 the Swedish Telecoms Administration in corporation with the Swedish Dog Training Centre started to investigate the possibility of using dogs for detecting decay in poles. At present two German Sheppheards and two Labrador Retrievers are in operation and the results have up to now well fulfilled our expectations. The following results have been obtained: 1.) The dogs can with high reliabili...
A Ammer, B Svedberg
Copper based water-borne preservatives: Copper adsorption in relation to performance against soft rot
1987 - IRG/WP 3452
As part of a fundamental study concerned with the performance of copper based water-borne preservatives the adsorption of copper from aqueous solutions by 4 hardwood and 1 softwood species has been studied. Experiments were conducted to determine the influence of solution pH, solution concentration and solution temperature. The results obtained were consistent with an acid form ion-exchange mechan...
P M S Rennie, S M Gray, D J Dickinson
Fungitoxic effect of the quaternary ammonium compounds wood preservatives against the Ascomycetes and Deuteromycetes
1997 - IRG/WP 97-30138
Results of investigation on fungitoxic value of the three formulations of wood preservatives based on the quaternary ammonium compounds (lauryldimethylbenzylammonium chloride, lauryldimethylbenzylammonium bromide, alkylbenzyldimethylammonium chloride) in relation to the surface wood colouring (moulds) and soft-rot fungi have been presented. The agar-plate (screening) and agar-wood plate for mouldi...
J Wazny, P Rudniewski
Degradation of polycyclic aromatic hydrocarbons by laccase
1998 - IRG/WP 98-10267
The degradation of polycyclic aromatic hydrocarbons (PAH) by laccase was investigated. Laccase catalyzed oxidation of phenanthrene, solubilized in the surfactant Tween 20, exhibited an absolute requirement for the mediator compound 1-hydroxybenzotriazole. When Tween 80 was used as the solubilizing agent, the oxidation rates were more than six times higher as compared to Tween 20. Using the thiobar...
S Böhmer, E Srebotnik, K Messner
Field study: Wood degradation pattern in buildings and utility poles in tropical climates of Nigeria
1992 - IRG/WP 92-1521
The paper is the result of five years field study of wood degradation patterns in three ecological forest zones (Guinea Savannah, Tropical rain forest and mangrove forest zones, respectively). It involved 800 residential buildings and 700 electric overhead transmission poles. The methodology used was a modified Eslyn (6) test. A high rate of Ascomycetes and Basidiomycetes attack especially on the ...
E O Onuorah
Evaluating the performance of wood preservatives against fungi
1974 - IRG/WP 247
A compilation is made of results published by various workers for agar/block laboratory tests of the effectiveness of wood preservatives against 11 species of wood destroying Basidiomycetes and one species of soft rot fungus. Preservatives include creosote, boron, metal/arsenic mixtures, metallic naphthenates, chlorinated naphthalene, chlorinated phenols and tri-n-butyl tin oxide. The results are ...
R Cockcroft
A method test of chemicals for the treatment of walls infected with Serpula lacrymans
1992 - IRG/WP 92-2408
A method, which has been used in the UK for over 25 years, is described for assessing the effectiveness of products for application to walls during remedial treatment to eradicate the dry rot fungus Serpula lacrymans. Approvals for products previously used for this purpose in the UK are being changed. Approval for tri n-butyltin oxide has been withdrawn, and PCP derivatives can continue to be used...
J K Carey
Resistance of acrylic paints on wood against growth of the rot fungus Dacrymyces stillatus
1990 - IRG/WP 2345
In the last few years the presence of the rot fungus Dacrymyces stillatus has been repeatedly confirmed in external wood panels, particularly from wood painted with water based paints. A laboratory method for testing of the fungal resistance of paint films on wood has been developed.This method has been used to test the efficacy of the fungicides Parmetol DF 18 and Parmetol HF 25 against attack by...
J Bjurman
Untersuchungen zur Prüfung mit Moderfäulepilzen im Vermiculit-Eingrabe-Verfahren
1972 - IRG/WP 214
Im Hinblick auf die Entwicklung eines Prüfverfahrens für die Bestimmung der moderfäulewidrigen Wirksamkeit von Holzschutzmitteln wurden Versuche mit Reinzuchten von Pilzen und mit Vermiculit als Trägersubstanz sowohl mit unbehandelten als auch mit Schutzmittelgetränkten Holzproben durchgeführt. Dabei wurde die Eignung von handelsüblichen, eintachen Einweg-Kunststoffbechern anstelle der bish...
W Kerner-Gang, M Gersonde
The influence of carrier fluid type on the efficacy of a wood preservative against cavity forming soft rot
2000 - IRG/WP 00-30244
Propiconazole was applied to Scots pine sapwood (Pinus sylvestris) and beech (Fagus sylvatica) using three different carrier systems selected on their varying ability to swell timber. The effects of microdistribution on the activity of cavity forming soft rot fungi were examined to determine the practical benefits of using swelling and non-swelling carriers with this active ingredient. Efficacy of...
P A Hodges
The effect of concrete embedment on CCA treated hardwood and softwood timbers
1985 - IRG/WP 3340
Small size stakes of Eucalyptus maculata and Pinus elliottii were treated with CCA to various retentions and embedded in concrete collars containing varying amounts of a fungicide additive. During the 30 month trial period stakes were removed after 12, 18, 24 and 30 months and assessed for residual strength. Stakes which showed significant strength reductions were microscopically examined for the ...
L E Leightley, G A Willoughby
IRG test of preservative-treated hardwoods with particular reference to soft rot. Report on condition of specimens installed in Victoria, Australia
1984 - IRG/WP 3318
Over a third of the treated stakes involved in this test have been mechanically damaged. As many of these stakes broke off at or near groundline they could not be reinstalled. So they have been removed from the study despite most exhibiting little or no decay. Because of the mechanical damage to a substantial number of the treated stakes, we propose to terminate the CSIRO part of this study after ...
G C Johnson, J D Thornton
Collaborative soft rot tests: Final Report
1978 - IRG/WP 2106
Since preparation of Document No: IRG/WP/258 results have been received from the remaining collaborators. Thus there is a little further to add to the conclusions already derived, those in Document No: IRG/WP/251 being as follows: 1) the exposure system used sometimes resulted in excessive weight gains in the sterile check blocks. Consequently the corrected loss in weight of the test blocks could ...
J G Savory, J K Carey
Comments on soft rot attack in timbers treated with CCA preservatives: A document for discussion
1982 - IRG/WP 1167
This paper is not based on any particular results but rather on several observations of soft-rot during many years of studies, and on a review of the existing literature. The short time available has unfortunately not permitted a detailed review of the literature. Data and knowledge of important facts are lacking for several aspects of soft-rot attack and for reactions occurring in the wood as a r...
T Nilsson
A new type of biocide suitable for use in different fields of wood preservation
1993 - IRG/WP 93-30014
A new type of polymeric biocides was developed containing quaternary ammonium and boron ester groups as active structure elements, to overcome the disadvantages of AAC's in wood preservation use and to utilise their good performance due to a broad efficacy against fungi on the other hand. The new biocides called polymeric betains have been tested in laboratory and field tests and especial...
V Barth, H Härtner
The relationship between preservative type and surface degrade in Pinus radiata
1980 - IRG/WP 3158
Samples of Pinus radiata D. Don were impregnated with one of two preservative types, a copper chrome arsenic salt and a light organic solvent preservative. The panels were exposed to the weather for 4-5 years at a site near Sydney, Australia. Macroscopic and microscopic examinations showed different rates and patterns of weathering between the samples treated with each preservative and an untreate...
R S Johnstone, R K Bamber
Studies and experiences of occurrence and development of soft rot in salt-treated poles of pine (Pinus sylvestris) installed in Swedish transmission lines in the years 1940-1945
1977 - IRG/WP 277
The present work describes the result of microscopic examinations of some 2,000 borings extracted from 20 to 23-year-old salt-treated poles (Scots pine) from the southern and central parts of Sweden. The purpose was to map out the occurrence of soft rot in Sweden and its influence on the mechanical strength of the poles as well as to contribute to the development of new and more satisfactory metho...
H Friis-Hansen
Investigations on testing with soft rot fungi by the vermiculite-burial method
1972 - IRG/WP 215
With the object of developing a test method to determine the effectiveness of wood preservatives against soft rot attack, tests have been carried out with pure fungal cultures using vermiculite as the substrate for untreated and preservative impregnated wood blocks. In these tests the suitability of common commercial, simple disposable beakers was proved successful as a substitute for the glass bo...
W Kerner-Gang, M Gersonde
Persistence and residual activity of organophosphorus termiticides in soil and prevention against the degradation of chlorpyrifos
1991 - IRG/WP 1518
The persistence and the residual activity of four comercial organophosphorous termiticides, Chlorpyrifos, Fenitrothion, Tetrachlorvinphos, Pyridaphenthion, in soil were studied under laboratory conditions. The persistence and the residual activity of four organophosphorous termiticides in two types of soil decreased with the lapse of time. These termiticides were mostly degraded by microorganisms ...
T Iijima, M Tanaka, M Higaki