Your search resulted in 1665 documents. Displaying 25 entries per page.
Effect of crude tall oil, linseed oil and rapeseed oil on the growth of the decay fungi
2002 - IRG/WP 02-30299
The influence of crude tall oil, linseed oil and rapeseed oil on the growth of Coniophora puteana, Poria placenta and Coriolus versicolor was studied. The selected test oils were observed to have different effects on the the fungal growth. Crude tall oil inhibited the radial growth of all fungi. Rapeseed oil either accelerated or inhibited the growth of fungi depending on the type of fungus involv...
L Paajanen, A-C Ritschkoff
New experiences with Dry Rot in Danish buildings, heat treatment and viability tests
1989 - IRG/WP 1423
An increasing number of concealed dry rot attacks, especially in older multi-storey houses under renovation, have been detected during the last few years. A necessary consequence is a demand for cheaper methods of repair, compared to the standard method used in Denmark for many years otherwise severely attacked houses will by pulled down. A heat-treatment has been developed and tested in practice....
A P Koch, C Kjerulf-Jensen, B Madsen
Repairs of dry rot damages. A follow-up survey
1989 - IRG/WP 1400
The success of repairs of dry rot (Serpula lacrymans) damage in small houses was studied by means of a questionnaire, interviews and inspections. The research material consisted of 92 buildings in the first follow-up survey and of 71 of those 92 buildings in the second survey 6 years later. In 55 buildings the damages had been repaired once and at that time the harmfulness of dry rot fungus was kn...
L Paajanen
Screening wood preservatives: Comparison of the soil block, agar block and agar plate tests
1993 - IRG/WP 93-20001
Several test procedures have been developed over the years to screen potential biocides for their value as wood preservatives. Each test has inherent advantages and disadvantages. In this paper the relative merits of the soil block, agar block and agar plate tests are compared. Eight commercially available biocides encompassing inorganic and organic systems were tested against four basidiomycete d...
K J Archer, D D Nicholas, T Schultz
Biological control of wood decay fungi. - Part II. Effects of exogenous nitrogen on effectiveness
2000 - IRG/WP 00-10360
The effects of nitrogen (urea and ammonium nitrate) on the ability of Trichoderma harzianum to inhibit the enzyme capabilities and decay capacities of Trametes versicolor and Gloeophyllum trabeum were investigated using a small wood sandwich decay test. The biocontrol fungus generally had a greater effect on the brown rot fungus, confirming previous reports. Nitrogen produced inconsistent effects ...
E A Canessa, J J Morrell
Gaseous treatment of timber with allyl isothiocyanate. Fungicidal and insecticidal effects
1996 - IRG/WP 96-30108
Gaseous treatment with allyl isothiocyanate (AIT) was tested for its effects on the growth of microorganisms on the wood substrate and the mortality of subterranean termites and powder-post beetles. Toxic limits of AIT were determined as concentrations in the air when an AIT-treated filter paper was placed in a sealed container with fungus-inoculated wood specimens. Those were <3.8 ppm for Aure...
K Tsunoda, T Yoshimura
Studies of the mechanism of chromated-copper preservative. Fixation using electron spin resonance
1992 - IRG/WP 92-3701
Two softwoods and one hardwood species were treated with chromium trioxide, copper sulphate, chromated-copper wood preservative (CCA). The treated wood samples were analyzed during fixation by electron spin resonance (ESR). ESR spectra indicated that more than one Cr(V) species was generated from Cr(VI) soon after CCA treatment. The Cr(V) signal became strong within increased several hours followe...
K Yamamoto, J N R Ruddick
The susceptibility of acetylated Pinus radiata to mould and stain fungi
1992 - IRG/WP 92-1548
The aim of this investigation was to determine the effect of 5, 10, 15 and 20 percent acetylation weight gains on the susceptibility of Pinus radiata sapwood to mould and stain fungi, and to establish if an acrylic paint, an oil-based stain and a water repellant gave superior protection from fungal growth on wood treated to 20% acetylation weight gain, compared to untreated wood. One treatment set...
R N Wakeling, D V Plackett, D R Cronshaw
Chromated copper arsenate preservative treatment of hardwoods. Part 2: leaching performance of seven North American hardwoods
1997 - IRG/WP 97-30132
Seven North American hardwood species were treated with 2% CCA-C solution and fixed at temperatures of 21°C and 50°C and conditions of high relative humidity (95%) as described in Part 1 of this presentation. Red pine (Pinus resinosa) was included as a softwood for comparison. Adequately fixed wood blocks (99.9% chromium fixation) were exposed to leaching tests according to AWPA E11-87 test. Par...
T Stevanovic-Janezic, P A Cooper, Y T Ung
Biosorption of metals for wood waste effluent clean up
1997 - IRG/WP 97-50090
The common filamentous fungi can sorb metal ions from aqueous solutions. The biosorption of metal ions like copper Cu2+, chromium Cr6+ and arsenic As5+ by dead fungal mycelia was investigated. Two industrial fermentation byproducts are tested: Mucor miehei and Aspergillus oryzae. The adsorption of metal ions depends on parameters such as chemical treatment of fungi before biosorption (acid or basi...
S Legay, G Labat
Fouling organisms as indicators of the environmental impact of marine preservative-treated wood
1995 - IRG/WP 95-50063
This study evaluates the use of fouling organisms (epibiota) to assess the environmental impact of preservative treated wood. This paper presents initial findings from treated panels exposed for 6 months at Sagres, Algarve, Portugal. Panels were treated with CCA, two copper-containing quaternary ammonium (ACQ) formulations and creosote, with nominal retentions from 10 to 40 kg/m³ (creosote 25 pcf...
R M Albuquerque, S M Cragg
Isolation and identification of non-decay fungi affecting the performance of alkylammonium compounds
1993 - IRG/WP 93-10020
The isolation of DDAC tolerant fungi was carried out on lumber treated with a range of antisapstain chemicals containing DDAC as one of their active ingredients. The tolerant fungi were selected by using malt media spiked with DDAC (100 and 2500 ppm). Isolations were tentatively identified into a range of fungi commonly found associated with wood deterioration (i.e. Penicillium sp. and Trichoderma...
A K Doyle, J N R Ruddick
The performance of chlorothalonil after 4.5 years in the accelerated field simulator
1994 - IRG/WP 94-30041
The decay resistance of chlorothalonil in oil was examined in an accelerated field simulator (AFS). Pinus radiata D. Don and Eucalyptus regnans F. Muell. sapwood stakes were treated, placed in soil in the AFS, and monitored over 4.5 years. CCA type C treated stakes were included for comparison. Water and toluene treated control stakes were heavily decayed after 1-2.5 years. Oil treated controls, t...
L J Cookson
Marine performance of preservative treated Southern pine panels. - Part 1: Exposure in Newport, Oregon
2000 - IRG/WP 00-10368
The ability of selected wood preservative to protect southern pine sapwood against marine borer attack was evaluated over a 6 year period in Yaquina Bay, Oregon. The site exposed the wood to potential attack by both Teredo navalis and Limnoria spp. Both creosote and CCA provided excellent protection at moderate retentions, while ACQ produced slight differences in performance depending on the coppe...
R G Rhatigan, J J Morrell, A R Zahora
Basilit CCFZ. Further studies on ecotoxicological behaviour
1992 - IRG/WP 92-3722
Basilit CCFZ is a new developed water based preservative for the protection of timber in hazard class 4 and 5 (ground-, fresh- and salt-water contact). The active components of this salt are copper, chromium, zinc and fluorine. In addition to primarily studies on the acute toxicity against organisms of the aquatic food chain a long term ecotoxicological study was performed. In a prolonged toxicity...
H W Wegen
Investigations into the biology of Meruliporia incrassata
2004 - IRG/WP 04-10508
The dry rot fungus Meruliporia incrassata (Berk. and Curt.) Murr. is a highly destructive brown rot wood decay fungus and is a significant pest of wooden structures. The fungus, know commonly as ‘Poria’, is characterized in culture by strand mycelium and skin-like surface mycelium. In structural environments it is found to produce prominent water conducting rhizomorphs, is a copious spore prod...
J Jellison, C Howell, B Goodell, S L Quarles
Further studies on soft rot decay in CCA treated Eucalyptus power transmission poles in Queensland, Australia
1980 - IRG/WP 1115
Preliminary results on the examination of fungi isolated from CCA treated Eucalyptus power transmission poles were presented at the 10th Annual IRG Meeting. Since then further examination and identification of fungal isolates has been completed together with screening tests for wood decay ability and tolerance to creosote and CCA and its components. Chemical analyses for CCA retention have also be...
L E Leightley
Main problems of Turkish wooden boat manufacturers
1982 - IRG/WP 485
The best transportation system to the eastern Black Sea region of Turkey has been since the earliest history sea transportation. As is well known the historical 'silk road' from Europe to the Far East and China was over the Black Sea and via Trabzon. During the last five years also this same connecting route has become very important for the transportation of food and industrial ...
R Ilhan
Eradication of wood decay fungi by means of radio frequency
1998 - IRG/WP 98-10292
High frequency electromagnetic fields i.e. radio frequency (RF) are used in wood industry for heating, gluing and bending of wood and are also appropriate for eradicating of wood decay fungi and insects. We investigated the effects of RF exposure on wood samples which were in vitro infected by Coniophora puteana, Gloeophyllum trabeum and Lentinus lepideus. For each fungus, the lethal temperature a...
F Pohleven, J Resnik, A Kobe
The influence of staining fungi on the decay resistance of wood treated with alkylammonium compounds
1984 - IRG/WP 3308
Although found to be very effective in laboratory tests, alkylammonium compounds (AAC's) have failed to perform as well in field stake tests. Examination of leachability showed that this was not the cause. The present study investigated the possibility that staining fungi, (which have been observed to rapidly infect the field stakes), degrade the AAC wood preservative. Soil-blocks were tr...
J N R Ruddick
Bending properties of wood after its decay with Coniophora puteana and subsequent modification with selected chemicals
1999 - IRG/WP 99-40146
Mechanical properties of wood are often decreased due to decay processes caused by biotic and/or abiotic factors. Damaged wooden elements (e.g. historical structures) can be reinforced by more methods, including their modification with convenient chemicals. This paper presents influences of selected chemicals on basic bending properties (modulus of elasticity - MOE, modulus of rupture - MOR) of so...
L Reinprecht, S Varinska
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
Wood and filter paper degradation, phenol oxidase and one-electron oxidation activities by the white rot fungus Ceriporiopsis subvermispora
2003 - IRG/WP 03-10486
The activities of one-electron oxidation and phenol oxidase during incubation of cultures of the white-rot basidiomycete Ceriporiopsis subvermispora containing either glucose or wood were periodically measured. Further, the degradation activities against wood and filter paper were examined during the course of cultivation. Weight losses of Japanese beech wood and Japanese cedar wood after 12 wee...
H Tanaka, S Itakura, A Enoki
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
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