Your search resulted in 194 documents. Displaying 25 entries per page.
Screening of modified linseed oils on their applicability in wood protection
2004 - IRG/WP 04-30346
In this study modified linseed oils, rape oil and three waxes were screened on their efficacy as wood protecting agents. By testing all products when impregnated with high retentions in Scots Pine sapwood on water repellence qualities, additionally an accelerated weathering test, drying quality, accelerated brown rot and blue stain test, an indication is formed of the capability of these products ...
A Treu, J Lückers, H Militz
Effect of origin and orientation of Radiata pine substrates on the development of fungal degrade
2000 - IRG/WP 00-30221
The objective of this study was to determine the influence of different radiata pine substrates on colonisation by sapstain fungi. Freshly-cut branch wood, stem wood and sawn lumber were used to prepare test samples with the largest wood surface area showing a transverse, radial or tangential face. Test samples were evaluated against sapstain fungi using a rapid laboratory antisapstain screening m...
B Kreber, D R Eden, C M Chittenden, B Carpenter, J G Van der Waals
Penetration as Key Factor for Determining the Performance of Wood Preservatives
2004 - IRG/WP 04-20293
Stakes of Scots pine sapwood with a dimension of 4 x 4 x 75 cm³ were impregnated with preservatives containing 2 % of propiconazole which had passed the EN 113 test criteria without any problems. The
penetration of the colourless preservative was determined successfully by a fungal screening test described by Sutter (1978). The test revealed the insufficient penetration behaviour within the gi...
H Leithoff, I Stephan, R-D Peek
The use of selective media for studying the colonization of wood in ground contact by microorganisms
1978 - IRG/WP 186
In October1976 a field trial was set up in order to monitor the progressive colonisation of wood in ground contact using orientated small stakes of Scots pine (Pinus sylvestris) and birch (Betula sp.) (30 x 45 x 250 mm³). Half the number of each species were treated with a 1% solution of CCA by a vacuum impregnation process. All the stakes were coated on three sides with an epoxy-resin sealant to...
C P Clubbe
Special seminar on screening techniques for potential wood preservative chemicals
1978 - IRG/WP 2113
This paper continues following issues:
I. SCREENING INSECTICIDES
1) R W Berry (BRE/PRL, UK): Screen testing of insecticides for use in remedial wood preservatives.
2) D J Cross (FRI, New Zealand): Rapid screening of contact insecticides for use on forest products.
3) C R Coggins; A Forsyth; A E Glaser (Rentokil, UK): Experience in the use of indicative screening techniques for termiticides.
...
Anonymous
Comparison of two laboratory methods for screening potential anti-sapstain chemicals
1993 - IRG/WP 93-10036
Two methods were used to screen a number of potential anti-sapstain chemicals in the laboratory. In one method miniature boards of freshly felled Scots pine sapwood were dip treated with the candidate chemical, sprayed with a suspension of stainers or moulds and incubated for five weeks. In the other method antibiotic assay discs were treated with precise quantities of chemical, plated out on malt...
S M Gray, D J Dickinson
Evaluation of Rosewood extractives as potential source for termite control
2003 - IRG/WP 03-30323
Rosewood (Aniba rosaeodora) is an extremely durable tropical timber species that has been widely used in the past in perfumery on account of its high proportion of essential oil. The aim of this study was to evaluate the efficacy of the extractives from rosewood as possible active ingredients for termite control.
Some rosewood sawdust has been extracted using different solvents and methods. The e...
M-F Thévenon, P Simonin, A Carrère, D Fouquet
Industrial fixation systems: key factors, limitations and optimisation through the use of computer simulation modelling. Discussion paper
1994 - IRG/WP 94-40026
This paper briefly describes four fixation operative in the Netherlands, namely: circulating and non-circulating steam fixation cylinders, steam fixation chambers and controlled climate rooms. The general limitations of industrial practice are reviewed against the background of established fixation theory. The controlling variables, both material and process-related, for fixation processing are sp...
A J Pendlebury, M Riepen, M J Boonstra, W Gard
A laboratory evaluation of tributyltin ethanesulphonate as an aqueous fungicide in wood preservation
1983 - IRG/WP 3229
Toxic limit data, using both leached and unleached wood test blocks, are reported for aqueous solutions of tributyltin ethanesulphonate against four Basidiomycete fungi, Poria placenta, Gloeophyllum trabeum, Coriolus versicolor and Coniophora puteana. An in situ study of the tributyltin compound in Scots pine and ponderosa pine sapwood has been carried out, using the technique of 119mSn Mössbauer...
R Hill, P J Smith, J N R Ruddick, K W Sweatman
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
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
Basidiospore germination threshold against borate in-vitro may vary between liquid and agar media
1992 - IRG/WP 92-2405
The concentration of disodium octaborate (BAE) which prevented mycelial growth of a common brown rot and 3 white rot fungi was compared to that required to prevent basidiospore germination on malt extract agar. Spore germination sensitivity was lower (50%) for only one of the white rot fungi. However, when spore germination thresholds were tested in malt extract-borate solutions in well slides (no...
E L Schmidt, Ya-Lih Lin
Standard and accelerated testing of boron-additive wood protection systems
2005 - IRG/WP 05-30381
The main objective of this research was to determine the effectiveness of boron-additive protection systems for above ground applications by means of field testing. The two field test procedures used are based on the L-joint test described in the European standard EN 330. For the first set up the boron treated timber was coated in accordance with the standard EN 330 system. The second set up is ba...
A Mohareb, J Van Acker, M Stevens
Determination of fungitoxic value of preservatives in laboratory wood-block tests. Part 2: Statistical estimation
1989 - IRG/WP 2327
Laboratory modified agar-block tests were made to determine the fungitoxic value of the wood preservative CCA against the test fungus Serpula lacrymans using statistical methods. With the aid of statistical computer programmes based on the least square method. the regression equation was found for the dependence between sample mass loss and preservative retention both in terms of percentage and fo...
J Wazny, J D Thornton, K J Krajewski
Evaluation of the protective means of some wood preservatives by means of accelerated tests
1973 - IRG/WP 232
In site conditions of the eastern site in the forest-steppe part of the Krasnovarsk region, the relative effectiveness of a series of wood preservatives was obtained by means of field tests. To obtain a more accurate evaluation of the protective qualities of these accelerated tests were carried out in laboratory conditions. In 9 boxes filled with non-sterile soil taken from the site, 72 samples of...
I A Petrenko
Effects of the specimen position on fungal colonisation and wood decay by en 113 test fungi
1998 - IRG/WP 98-20136
For testing wood preservatives according to EN 113 it is common practice to plant the test blocks on neutral supports in order to prevent (1) a diffusion of chemicals into the agar medium and (2) an excessive moistening of the specimens. The procedure was employed in EN 350-1 for testing the natural durability of solid wood.
It turned out to be of problematic nature because of the individual requ...
G Kleist, M-T Lenz, R-D Peek
Antagonistic properties of Gliocladium virens against wood attacking fungi
1996 - IRG/WP 96-10162
Gliocladium virens has shown good antagonism against decay fungi in agar medium and in wood blocks. Gliotoxin produced by Gliocladium virens is associated with biocontrol of some plant diseases, but its importance to biocontrol of wood-attacking fungi is unknown. We investigated the ability of gliotoxin-producing (GLT+) isolates of Gliocladium virens and gliotoxin-deficient (GLT-) mutants of Glioc...
T L Highley, H S Ananthapadmanabha, C R Howell
Determination of fungitoxic value of preservatives in laboratory wood-block tests. Part 1: Standard procedures
1989 - IRG/WP 2326
By applying a modified agar-block method, a comparative analysis was made on the toxic value of the wood preservative CCA against the test fungus Serpula lacrymans. The procedure applied to determine the results accounted for different standards: EN (Toxic limit), ASTM (threshold retention), GOST (threshold retention and protection probability), PN (toxic doses) and JIS (value of efficiency). Desp...
J Wazny, J D Thornton
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
Further steps in the development of above ground wood preservative systems
2002 - IRG/WP 02-30300
Metal and organo-metallic wood preservative systems have provided the consumer with cost effective wood preservative systems which satisfy the performance requirements in a wide range of end uses.
With increasing environmental and legislative control, metal-free formulations have emerged as the dominant preservative systems for the protection of timber in the lower hazard classes.
In higher ha...
P Warburton, A S Hughes
Chemostimulatory and chemotropic responses by fungi to preserved and unpreserved wood
1981 - IRG/WP 1134
During experiments to determine the presence of biotic connections between soil and wood at this laboratory, marked chemotropic responses to wood were demonstrated by some wood destroying micro-organism in agar culture. These were shown at some distance from bait, up to 35 mm away, and on some occasions were unaffected by the presence of toxic materials. This paper provides preliminary data on the...
G Mowe, B King
Increased biological durability differs for traditional wood preservation and new non-biocidal systems (NBS)
2000 - IRG/WP 00-20212
Wood preservation is a way to increase the biological durability of wood by the addition of chemical components with a biocidal effect. The effect of such treatment is clearly concentration dependent. At distinct levels of fungicide concentration fungi are killed or inhibited in their enzymatic functioning to provide nutrients. The toxic limits allow decision-makers to provide treating prescriptio...
J Van Acker, M Stevens
A real scale evaluation method and results on termite resistance of housing wall systems and floor framings
1999 - IRG/WP 99-10314
For evaluating the termite resistance of real scale houses especially housing wall systems and floor framings, a experimental building was prepared. After initial feeding of termite, this house was constructed. In this experimental building, several parts which were built by different wall systems and floor framing. The room temperature of these parts were controlled. Water can be provided in the ...
K Suzuki, K Okada, K Hagio, Y Tanaka
Screening test methods with termites as first laboratory evaluation of new active substances for wood preservation
1995 - IRG/WP 95-10135
European test methods (EN) with termites have been compared with long-standing experience from screening test methods in the laboratory of Eberswalde. The results are discussed in terms on the possibility of using screening test methods as the first laboratory evaluation of new active substances in wood preservatives. The advantages and disadvantages of these methods are considered. Only a small a...
W Unger
A comparison of fungal strains used in the bioassay of wood preservatives
1984 - IRG/WP 2220
Previously published data are presented relating to a number of strains of wood-destroying basidiomycetes (Coniophora puteana, Coriolus versicolor, Gloeophyllum abietinum, Gloeophyllum sepiarium, Gloeophyllum trabeum, Lentinus lepideus, Poria placenta, Fibroporia vaillantii and Serpula lacrymans) commonly used as test fungi in the bioassay of wood preservatives. The data, which has not been statis...
J Wazny, H Greaves