Your search resulted in 407 documents. Displaying 25 entries per page.
Effect of extractives on durability of Prosopis juliflora heartwood
2009 - IRG/WP 09-30518
The heartwood of Prosopis juliflora is resistant to fungal attack caused by different brown and white rot fungi. This durability due to the presence of high amounts of extractives decreases after extraction of these latter ones with different solvents. Heartwood extractives were effective in inhibiting the growth of the fungi. Depending on the concentration used, development of the fungal mycelium...
P Sirmah, K Iaych, B Poaty, S Dumarçay, P Gérardin
The effect of chemical changes on the wood-moisture relationships in thermally-modified wood
2009 - IRG/WP 09-40473
Small specimens of three wood species were thermally modified following twenty schedules in the 190-245°C temperature range for treatment times between 0.3 and 16 h. Five wood-moisture relations were subsequently determined, namely: anti-swelling efficiency (ASE), movement, hygroscopicity (adsorption and desorption), transversal swelling (radial and tangential directions), and equilibrium moistur...
M M González-Peña, M D C Hale
Effect of Heavy Metals on the Expression of Manganese Dependent Peroxidases of Phanerochaete chrysosporium
2010 - IRG/WP 10-10722
This work is part of an ongoing investigation that studies the application of a solution rich in Zn and Mn, obtained from a recycling process, as a preservative for wood. The effects of Zn2+ and Mn2+ on the enzyme-expression level of manganese-dependent peroxidase (MnP) from Phanerochaete chrysosporium was studied by real-time PCR. The glyceraldehyde 3-phosphate dehydrogenase gene (gpd) was used a...
C Ibáñez, M Rabinovich, M Barraco, G Gecchetto, M Cerdeiras
Onset of mould growth – the effect of climate variability and different geographic locations
2010 - IRG/WP 10-20446
This paper presents a study on how climate conditions at numerous locations in Sweden affect the risk of onset of mould on wood sheltered outdoors. The results indicate that the risk is clearly higher in the south compared to the north of Sweden. These differences are mainly explained by colder and dryer winter periods in the north which is unfavorable for development of mould. The results also sh...
M Häglund, T Isaksson, S Thelandersson
Synthesis of novelty borate compounds for wood preservatives: Laboratory test of leachability and decay resistance
2010 - IRG/WP 10-30520
A novel series of ammonium tetraphenylborate (ATB) and borate chemical compounds (BBC) were synthesized as wood preservatives. The leaching rates and decay resistance of boron formulations containing ATB and BBC were conducted. The laboratory leaching results showed that boron leaching rate of treated wood by ATB formulations was from 2.1% - 6.7%, while that of BBC formulations from 23.3% -59.0%. ...
Zhiqiang Li, Mingliang Jiang, Xingxia Ma
Antifungal Effect of Bark and Wood Extracts of Condalia hookerii (Rhamnaceae), Ebenopsis ebano (Fabaceae) and Helietta parvifolia (Rutaceae) on Trametes versicolor
2010 - IRG/WP 10-30532
This research detail the growing inhibition effect on Coniophora puteana and Trametes versicolor fungi caused by hot water sawdust and bark extracts of three semi-arid land species Condalia hookerii, Ebenopsis ebano and Helietta parvifolia diluted in malt extract agar medium at 2000 ppm and 10000 ppm. After 12-14 days incubation the inhibition growing effect was measured based on the difference be...
A Carrillo, J G Marmolejo, F Garza, V Bustamante, M Garza
Studies on Effect of pH on Copper Availability in Copper-Based Preservatives
2010 - IRG/WP 10-30549
Laboratory methods have been employed to investigate the pH effect on the copper solubility of basic copper carbonate. The pH was controlled using two different approaches. One was with the adjustment of pH of the solutions by acid or base using sulfuric acid or sodium hydroxide until the solution equilibriums were obtained for each defined pH. A second approach was to control pH with buffer sol...
L Jin, P Walcheski, A F Preston
Effect of 4 Preservatives on Physical, Mechanical and Mold-Resistant Properties of Bamboo Oriented Strand Boards
2010 - IRG/WP 10-40483
This study investigated the effects of 4 preservative systems on physical, mechanical and mold-resistant properties of bamboo oriented strand board (OSB) panels bonded with urea formaldehyde resin. Preservative A (Zinc Borate), B (IPBC), C (AAC+Borate) and D (carbendazim + prochloraz) were incorporated with strands during blending at three loading levels. The results showed that the mechanical and...
Juwan Jin, Daochun Qin, Wanshu Wei, Kuan Fan
Influence addition of boron compounds to adhesives on the bonding quality and fungicidal properties of glued wood
2010 - IRG/WP 10-40497
Wood is one of the most important construction materials. However, users of wood face two issues: limited dimensions and insufficient durability. These issues have been overcome with the development of bonding and wood preservation. The preservation of glued wood is elucidated in this paper. Through the addition of boric acid to adhesives, we tried to improve the fungicidal properties of glued woo...
M Humar, B Lesar, A Ugovsek, M Kariz, P Kralj, M Šernek
Effect of borax-boric acid Treatment of simul (Bombax ceiba) Veneers on Glue-Bond Quality of Plywood
2010 - IRG/WP 10-40525
The glue-bond quality of plywood made of treated simul (Bombax ceiba) veneers was investigated. The veneers were treated with cold and hot water solution of borax-boric acid (BB) of different concentrations and treatment durations. The plywoods were made at three different pressures in hot press using urea formaldehyde glue. The glue-bond strength of untreated plywood in dry shear-test was found t...
K Akhter, Md Abul Hashem, S Akhter
Effect of Coatings on the Durability of Birch and Spruce Plywood. Part 1: Weathering Performance
2010 - IRG/WP 10-40526
Several different coated birch and spruce plywood types were investigated in Finland using outdoor weathering. The weather performance of the tested coated birch plywood was good compared with uncoated birch and spruce plywood. The paint base film coated and painted birch plywood performed well in outdoor testing at VTT's test site. Phenol film coated plywood was sensitive to UV light, but on...
A Nurmi, H Viitanen
Effect of Coatings on the Durability of Birch and Spruce Plywood. Part 2: Biological Durability
2010 - IRG/WP 10-40527
Several different coated birch and spruce plywood types were investigated in Finland using the combination of outdoor weathering and decay test EN 12038. The most important factor to affect on the biological performance of birch plywood, coated and uncoated, was edge sealing. For spruce plywood edge sealing had a smaller effect. However, in spite of positive effect against decay, edge sealing did ...
A Nurmi, H Viitanen
Effect of Nano-Silver Treatment on Densified Wood Properties. Part One: Swelling, Recovery Set, Bending Strength
2010 - IRG/WP 10-40533
In this research the effect of Nano-Silver treatment on compressed wood properties, was studied. Wood specimens were cut from Popolus alba (poplar) and impregnated with Nano-Silver and water. Then the saturated samples were compressed through radial direction in a hot press under pressure of 6 MPa, for 1 and 4 hours. The temperatures of press were 150°C and 175°C. Swelling (24h), recovery set ...
G Rassam, H Reza Taghiyari, B Jamnani, M Ali Khaje
Combined Effect of Boric Acid and Waste Oil Treatment on Boron Leaching
2010 - IRG/WP 10-50268
In this study it was aimed to investigate the boron leaching amounts in Scots pine wood samples treated with boric acid (BA) and waste oil (WO) alone or by dual treatment. The level of water absorption and water repellent efficiency were determined with cyclical wetting tests, total of 336 hours. Wood samples that have both covered and uncovered transversal section were impregnated with 3% boric a...
Ü C Yildiz, E Dizman
Effect of heating on aldehydes emissions from solid wood
2011 - IRG/WP 10-50277
We have found that acetaldehyde, a probable human carcinogen, is produced from wood through reaction with ethanol. Alcohols are increasingly being used in houses and buildings for cleaning purposes. Acetaldehyde emission from solid wood has been attributed to ethanol acidification by enzymes such as ethanol dehydrogenase. Heating could inactivate these enzymes. In this study, the effects of heatin...
A Ishikawa, K Miyamoto, S Tohmura, A Inoue
Decay resistance attributes of teak (Tectona grandis L. f.) wood: comparison of the fungicidal activities of quinones
2011 - IRG/WP 11-10752
The implication of quinones in decay resistance of teak wood is controversial. To better understand the role of individual quinone in this property, we studied the correlations between this latter and the content of 2-(hydroxymethyl)anthraquinone, tectoquinone, anthraquinone-2-carboxylic acid, 1,4-naphthoquinone, lapachol and the new compound 4’,5’-dihydroxy-epiisocatalponol found in teak wood...
F B Niamké, N Amusant, N Lemenager, G Chaix, M-F Thévenon, C Baudassé, S Kati-Coulibaly, A Amissa Adima, I Gossan Ado, C Jay-Allemand
Effect of P/F ratio, PF concentration and treating method on boron leaching from wood treated with PF modified boron compounds
2011 - IRG/WP 11-30559
In order to immobilize boron in wood, three kinds of resol-type phenol-formaldehyde (PF) resin with different P/F ratios were synthesized in laboratory and incorporated with three types of boron compounds to treat wood. The used boron compounds included boric acid (BA), borax (BX) and disodium octaborate tetrahydrate (DOT). The leaching test of boron from wood blocks was performed according to the...
Liping Yu, Jinzhen Cao
The potential for using CuO nanoparticles as a wood preservative
2011 - IRG/WP 11-30569
The potential for using nano-copper particles for wood protection was investigated using mini-agar slant and wood block tests with Gloeophyllum trabeum or Trametes versicolor. Nano-copper was more effective against G. trabeum than T. versicolor, although neither of these fungi would be considered copper tolerant. Nano-copper solutions were stable over a 17 week storage period, but precipitated w...
I S Weitz, K Knani, M Maoz, C Freitag, J J Morrell
The study of fungicidal values und sorption processes of ionic liquids- potential wood preservatives on soils
2011 - IRG/WP 11-30572
In the paper, the fungicidal activity of new ionic liquids structures, N,N-dimethylalkylamines derivatives, containing a spacer built of 7 or 10 methylene groups with nitrate(V) and tetrafluoroborate anions, didecyldimethylammonium and benzalkonium nitrate(V) were presented. The research was also conducted on the sorption of cations of ammonium ionic liquids on five types of podzolic, humic alluvi...
W Przybylska, J Zabielska-Matejuk, A Stangierska, A Skrzypczak
Evaluation effect of kiln schedule on Warp, Twist, Bow and surface checks in Poplar Wood
2011 - IRG/WP 11-40565
In this research, to establish a kiln-drying schedule for poplar (Populus nigra) lumber with 75 mm thickness that cut down from North Khorasan province in Iran, with three schedules T5-D2 (Forest Product Laboratory), T5-D3 and T8-D5 were adapted for drying the lumbers down to the final moisture content of 8±2%. primary dry bulb temperature each three schedules was adjusted at 49,49 and 54°C and ...
M. Akhtari, M.Arefkhani
Effect of Nano-silver Treatment on Densified Poplar Wood Properties. Part Two: Spring Back, Compression set, Impact Load Resistance and Hardness
2011 - IRG/WP 11-40568
This paper is the second part of the study of applying nano-silver treatment before densification of poplar wood (Popolus alba). The specimens were prepared in four groups of: 1) nano-silver impregnated 2) water impregnated 3) dried with no impregnation and 4) the control specimens. The impregnation process was done by empty cell process. Then, the groups of 1 to 3 were compressed in a hot press a...
G Rassam, H Reza Taghiyari, B Jamnani, M Ali Khajeh
Effect of an antioxidant on the efficacy of organic wood preservatives in an accelerated soil contact decay test
2012 - IRG/WP 12-30583
In comparison to inorganic wood preservatives, organic biocides in transient carriers are considerably less effective when the treated wood is exposed to soil contact. Various oils are used in some formulations with pentachlorophenol to improve the efficacy. However, use of these oils imparts unacceptable properties to products used in residential applications. Consequently, there is a need to de...
D D Nicholas, J Shi, T P Schultz, L Sites
Effect of Biodiesel on the Efficacy of Pentachlorophenol Treated Wood
2012 - IRG/WP 12-30584
Pentachlorophenol (PCP) is widely used as a wood preservative for utility poles and other wood products. Recently, it has been proposed that a modified PCP carrier system based on a diesel/biodiesel mixture should be used in place of the conventional diesel/KB3 carrier, but there is some question as to whether or not this modified carrier system can provide the same service life for wood products ...
S Keshani Langroodi, H Borazjani, D Nicholas, L Prewitt, S V Diehl
Effects of oil types and treatment temperature on the properties of wood subjected to thermal modification in oil medium
2012 - IRG/WP 12-40574
The effect of the use of oil as a medium of heat transfer during thermal modification of different species of wood has been widely investigated with different results accruing with regards to the various end-use properties of the materials. However very little have been done on the effect of oil types as well as its interaction with treatment temperature on the resultant properties of the material...
L Awoyemi, M M Apetogbor, A A Oteng-Amoako
Effect of preservative treatment on dimensional stability of plywood made of treated simul (Bombax ceiba) veneer
2012 - IRG/WP 12-40575
The dimensional stability such as thickness swelling and water absorption of plywood made of treated simul (Bombax ceiba) veneers were investigated after 2 hours and 24 hours soaking under water. The veneers were treated with hot water and cold water solution of borax-boric acid (1:1), neem leaves and mahogany seeds of different concentration (1:10, 1:20, and 1:40) at different treatment duration....
K Akhter, M Mahabubur Rahaman, A Ara