Your search resulted in 148 documents. Displaying 25 entries per page.
Fungal decay resistance and mechanical properties of plywood panels made from maritime pine (Pinus pinaster) and bonded with cornstarch-quebracho tannin-phenol formaldehyde adhesive
2010 - IRG/WP 10-40490
The aim of this work is to demonstrate the performances of cornstarch-quebracho tannin-based resins designed as adhesive in the plywood production. In this way, the cornstarch and quebracho tannin was introduced in the classic adhesive formulation in order to supply a part of phenol-formaldehyde (PF). In order to evaluate the mechanical performances of optimal cornstarch-quebracho tannin-PF, plywo...
F Charrier, A Moubarik, A Allal, A Pizzi, B Charrier
Durability of heat treated Malaysian bamboo Gigantochloa scortechinii strips
2010 - IRG/WP 10-40514
Bamboo is one of the fastest growing plants and can be used for various products. In tropical countries such as Malaysia bamboo is abundantly available at reasonable prices, therefore it is used for numerous purposes. However, bamboo (as a lignocellulosic material) is susceptible to fungal and insect attack and it is difficult to protect by preservative treatment. Heat treatment is an option to im...
N Kamarudin, K Sugiyanto
Biological and mechanical performances of particleboard panels made from maritime pine (Pinus pinaster) and glued with cornstarch-mimosa tannin-urea formaldehyde adhesive
2011 - IRG/WP 11-40542
The objective of this work was to demonstrate the utility of cornstarch-mimosa tannin-based resins designed for application as an adhesive in the particleboard production. Bond qualities of cornstarch-mimosa tannin- urea formaldehyde (UF) (10:4:86, weight ratios) resins and commercial UF resin were assessed by using an automatic bonding evaluation system, prior to production of particleboard panel...
A Moubarik, F Charrier, A Pizzi, A Allal, B Charrier
Coconut lumber for wood decks (Cocos nucifera L.): decay resistance against Basidiomycetes fungi
2012 - IRG/WP 12-10784
Since a couple of years, manufactured products of coconut wood for outdoor uses like wood decks have been proposed on the European market. These are presented as an alternative for traditional tropical timbers. In the past, coconut wood was neglected and burned for sanitary reasons and lack of interest at industrial scale. Plantation coconut trees at end of production of copra constitute a renewab...
B Jourez, C Verheyen, J Van Acker
Effect of Nano-silver and Nano-copper and Nano-zinc oxide on Paulownia wood exposed to white-rot fungus
2013 - IRG/WP 13-30635
Paulownia is known as a fast growing tree and it can be used in several applications. The present study investigated the effect of Nano-silver and Nano-copper and Nano- zinc oxide on resistance of Paulowina (Paulownia fortunei) wood against the white rot fungus (Coriolus versicolor). Wood specimens with a dry density of 0.37g/cm3 were impregnated with a 400 ppm aqueous suspension of micronized na...
M Akhtari, M Ganjipour
In vitro fungicidal activity of Tunisian essences extracts against Coriolus versicolor and Coniophora puteana
2014 - IRG/WP 14-20544
Bark of six Tunisian species including cork oak (Quercus suber L.), eucalyptus camaldulensis, alder (Alnus glutinosa), Aleppo pine (Pinus halepensis), nut pine (Pinus pinea) and Chelfi pomegranates (Punica granatum) were tested against two rot-fungi: Coriolus Versicolor (for leafy trees) and Coniophora Puteana (for conifers) according to an adaptation of the European guidelines (NF EN 113, 1986). ...
L Lajnef, N Ayed, B Charrier
Ammoniacal zinc borate as solid wood preservative
2014 - IRG/WP 14-30659
Zinc borate, well-known for its fungicidal, insecticidal and flame resistant properties, is widely used in manufacture of lignocellulose particle board. This form of borate is the least water soluble form available providing advantages as well as disadvantages for use as a wood preservative. This form does not leach from wood under conditions of high humidity, but it is also very difficult to appl...
C Ibáñez, C Mantero, A Ibarra, M Rabinovich
Effectiveness of Gleditsia triacanthos heartwood extractives as wood protector
2019 - IRG/WP 19-10950
In Uruguay, Gleditsia triacanthos (known as honey locust) is an exotic tree species categorized as invasive; it produces severe ecological impact as it displaces native species, causing changes in the structure of the native forest community. Being extremely difficult to control, it is widely distributed through Uruguay and neighbouring countries. However, one way to mitigate its negative impact i...
C M Ibanez, C Mantero, P Raimonda, X Pintos, E Pereira
Effect of nanoparticle impregnation on the biological durability of wood
2022 - IRG/WP 22-30772
This study evaluated the efficacy of five different nanoparticles (zinc-oxide, zinc-borate, silver, copper-oxide, copper-borate) applied with different concentrations against the brown rot Coniophora puteana and the white rot Coriolus versicolor. The generally effective nanoparticle treatments were the combinations containing borate in its chemical structure. However, only zinc-oxide and silver na...
M Bak, R Németh
Preliminary study of the fungicidal and structural variability in copper naphthenates and naphthenic acids
1996 - IRG/WP 96-30114
Copper naphthenates, an oil-borne wood preservative listed by the American Wood-Preservers' Association (AWPA), is manufactured by complexing copper(II) with naphthenic acids. Prior to AWPA listing as a wood preservative, field experiments showed that copper naphthenates generally had good stability and were active against wood-destroying organisms. Recently, however, there have been reports ...
T Schultz, D D Nicholas, L L Ingram Jr, T H Fisher
Fungicidal activity of some organic solvents, copper carboxylates and their complexes with 2-aminoethanol
1997 - IRG/WP 97-30136
We evaluated the activity of eight organic solvents against wood - rotting fungus Trametes versicolor in order to choose the most appropriate one for rapid screening tests of some copper(II) carboxylates and their adducts with 2-aminoethanol. Their activity against the selected fungus was classified in the following order: chloroform > N,N-dimethylformamide > acetonitrile > methanol > ...
M Petric, F Pohleven
Basidiosporogenesis by the white-rot basidiomycetes in vitr
1994 - IRG/WP 94-10081
Basidiospores of all forest-inhabiting basidiomycetes are a primary source of infection causing wood decay. However, most studies evaluating wood preservatives have used mycelia or basidiospores obtained from wild mushrooms. The objective of this study was to demonstrate in vitro methods that promote carpogenesis and basidiosporogenesis by the white-rot basidiomycetes, Schizophyllum commune and Tr...
S C Croan
Protection of Ochroma pyramidale from fungal decay with N,N-napthaloylhyroxylamine
1998 - IRG/WP 98-30182
Fungal decay of wood in service results in billions of dollars (U.S.) in losses annually. Recent environmental restrictions, both U.S. and international, are limiting and eliminating the use of broad-spectrum, heavy metal biocides for wood preservation. Restrictions result primarily from problems with disposal. New wood preservatives need to be developed and tested which specifically target key el...
F Green III, T L Highley
Effect of asphyxiation on wood decay fungi treated
with argon and nitrogen gas
2002 - IRG/WP 02-10452
The effects of low-oxygen conditions, achieved with either argon or nitrogen gas, on the viability of wood decay fungi Coniophora puteana, Antrodia vaillantii and Trametes versicolor, cultivated on PDA medium and infected wood samples, were examined. The fungal cultures were exposed to low oxygen concentration (below 10 ppm) for one to five weeks in hermetically sealed vessels. Anoxic treatment di...
C Tavzes, F Pohleven, M Janisek, R J Koestler
Effect of Trichoderma harzianum on induction of laccase by Trametes versicolor on ponderosa pine sapwood
1996 - IRG/WP 96-10177
Trichoderma harzianum has long been studied as a possible biocontrol agent against wood degrading fungi, and has provided varying degrees of protection in several European field trials. In laboratory trials, however, this fungus appears to be less active against white rot fungi. This characteristic was studied using a wood wafer sandwich procedure which simultaneously expose ponderosa pine sapwood...
E A Canessa, J J Morrell
Natural durability of eight tropical hardwoods species from Africa
2005 - IRG/WP 05-10563
Current forest inventory results reveal that there are more than 700 hundred-hardwood species in tropical forests, of which less than 10 percent are harvested and used for commercial purposes. The increased use of lesser-known species can decrease the pressure on current commercial species, increase the value of the forest and lead to better management practices. However basic information on physi...
P Nzokou, K Wehner, D P Kamdem
Ekki heartwood - is “Durable”
2002 - IRG/WP 02-10444
Severe decay damages of bridges made of ekki (Lophira alata Banks) wood which is classified as a durable species in the EN 350:2 as already reported at the 31 IRG annual meeting. This paper deals with results of long-term decay tests of ekki heartwood specimens using 3 isolates (Loweporus tephroporus 2 strains and a fungus of other sp. from damaged ekki bridges) and Trametes versicolor as a refere...
S Doi, R Itoh, S Horisawa
List of wood-destroying fungi in Iran
1976 - IRG/WP 138
This list gives information on the wood-destroying fungi collected in the Iranian forests and from felled logs and boards in sawmills until now. They are mainly from the region of the Caspian Forests and from the climatically dry region between Teheran and Azarbaidjan, North Iran. It is understood, that this document may help to give more knowledge outside the country about the specific problems o...
P Soleimani
Effect of media composition on the antagonistic properties of Trichoderma spp. against wood decay fung
1992 - IRG/WP 92-1538
Most screening of potential biocontrol agents of wood decay fungi has previously been undertaken using artificial media. Similarly experiments designed to evaluate the mechanisms involved in antagonism between biological control agents and target fungi, have largely been carried out in conditions which do not accurately reflect the nutrient status of wood. This paper examines the influence of nutr...
U Srinivasan, A Bruce, H J Staines
Determination of absorption, accumulation and transport of copper in mycelium of some wood decay fungi
1999 - IRG/WP 99-10323
Copper compounds are common wood preservatives. However, tolerance of some wood decay fungi to copper compounds has been observed recently. Therefore, we tried to elucidate possible causes of this phenomenon. We investigated uptake, accumulation and secretion of copper in the mycelium of potentially copper tolerant fungi (Antrodia sp.) and non tolerant fungus Trametes versicolor. We observed that ...
F Pohleven, S Breznikar, P Kalan, M Petric
Decay and termite durabilities of heat-treated wood
2004 - IRG/WP 04-40272
Decay and termite resistances of Plato-treated timbers were evaluated using a modified JIS decay test method, feeding test in a laboratory scale and a field exposure against Reticulitermes speratus (Kolbe) or Coptotermes formosanus Shiraki. The results showed that no significant decay durability of the
treated timbers although mass loss from decay slightly decreased in case of treated timbers. ...
S Doi, K Hanataa, E Kamonji, Yuuji Miyazaki
Preservative ability of wood to be fixed hydroxyl apatite substituted for antimicrobial metals
2001 - IRG/WP 01-30272
We succeeded in forming hydroxy apatite (HAp) in wood. HAp is non-toxicity and safe. Preservative ability of the wood, which substituted one part of Ca of constituent element of this HA p for antibacterial metals was measured. When Ca was substituted for Ag or Zn, mass loss in decay by brown-rot fungus F. palustris was restrained in about 50% (Ag) ~30% (Zn) of value of control specimen. However, w...
Y Haruhiko, I Sumaru
Evaluation of chlorpyrifos and fungicides alone and in combination for control of insects and fungi in wood and wood composites
1998 - IRG/WP 98-30187
Wood composites are rapidly being adapted for use in exterior applications. The incorporation of a preservative system to prevent fungus and insect attack is necessary with most exterior composites. Research studies were reviewed pertaining to organic preservative systems based on Lentrek* insecticide wood treatment which contains the active ingredient chlorpyrifos alone and in combination with te...
M P Tolley, P E Laks, R Fears
Efficacy of anhydrides as wood protection chemicals
1997 - IRG/WP 97-30162
Wood samples treated with anhydrides of various compositions have been examined for their decay resistance and moisture behaviour. For this purpose two brown rot fungi (Coniophora puteana and Gloeophyllum trabeum) and two white rot fungi (Trametes versicolor and Pycnoporus sanguineus) were used in conventional and modified soil block tests. The modified soil block tests conformed to the method as ...
S C Forster, M D C Hale, G R Williams
Evaluating the potential of amine chemicals for use as wood protecting agents. Part 1: Investigation of cation components of quaternary ammonium compounds
1994 - IRG/WP 94-30049
Quaternary ammonium compounds (quats) have shown a great potential as more environmentally acceptable wood preservatives. In order to identify chemicals possessing the wood protecting potential, an evaluation was carried out of a range of commercially available 'quats', using a modified soil block test. Ponderosa pine sapwood blocks were treated with selected 'quat&a...
Hang Tang, J N R Ruddick