Your search resulted in 571 documents. Displaying 25 entries per page.
Effect of borax-boric acid Treatment of simul (Bombax ceiba) Veneers on Glue-Bond Quality of Plywood
2010 - IRG/WP 10-40525
…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 to be 2.17 and 2.29 N/mm2…
K Akhter, Md Abul Hashem, S Akhter
Preservative Treatment of simul (Bombax ceiba) Veneers with Hot and Cold Water Solution of borax-boric acid by Soaking Process
2010 - IRG/WP 10-40528
…concentrations of water- borne preservatives borax-boric acid (BB) by soaking process for different time periods. In the case of hot water treatment, it was found that the average retention of preservative chemicals increased gradually with the increasing treatment period from 20 minutes to 60 minutes. Similar…
K Akhter, Md Abul Hashem, S Akhter
Optimization of oxalic acid production for bioleaching of metal components from CCA-treated wood by an unknown Polyporales sp. KUC8959
2010 - IRG/WP 10-50266
…in our Lab. The fungus produced a larger amount of oxalic acid than other fungi tested, and removed 90 % or more of chromium, copper and arsenic from CCA-treated wood sawdust through bioleaching process. The bioleaching process was consisted of two steps comprising fermentation of the fungus for oxalic acid…
Yong-Seok Choi, Min-Ji Kim, Jae-Jin Kim, Gyu-Hyeok Kim
Microwave-Assisted Organic Acids Extraction of Chromate Copper Arsenate (CCA)-Treated Southern Pine
2010 - IRG/WP 10-50267
The extraction effects of acid concentration, reaction time and temperature in a microwave reactor on recovery of CCA-treated wood were evaluated. Extraction of copper, chromium, and arsenic metals from chromated copper arsenate (CCA)-treated southern pine wood samples with two…
Bin Yu, Chung Y Hse, T F Shupe
Combined Effect of Boric Acid and Waste Oil Treatment on Boron Leaching
2010 - IRG/WP 10-50268
…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…
Ü C Yildiz, E Dizman
Rapid Microwave-Assisted Acid Extraction of Metals from Chromated Copper Arsenate (CCA)-Treated Southern Pine Wood
2009 - IRG/WP 09-50262
The effects of acid concentration, reaction time, and temperature in a microwave reactor on recovery of CCA-treated wood were evaluated. Extraction of copper, chromium, and arsenic metals from chromated copper arsenate (CCA)-treated southern pine wood samples with three…
Bin Yu, Chung Y Hse, T F Shupe
Preservative treatment of strips of Bambusa balcooa by soaking process using Borax-Boric acid
2008 - IRG/WP 08-30478
…bamboo (Bambusa balcooa) were treated with 10% borax-boric acid aqueous solution by soaking process. The moisture contents of the bamboo strips were 12%, 20% and 30%. The strips were soaked for one, two, three, four and five days. The penetration of the
solution was investigated by colour test after soaking and…
K Akhter, M W Sheikh, M M Rahman, T A Chowdhury, M H Chowdhury
Effects of acetic acid and nitric acid pre-treatment on copper content of spruce wood treated with CBA-A and CCA
2008 - IRG/WP 08-40406
This work investigates the effects of nitric acid and acetic acid on compression strength values and copper retention contents of refractory spruce wood (Picea oriental L.) treated with the waterborne preservative Copper azole, (CBA-A, Tanalith-E 3492) and copper / chrom / arsenic (CCA). Before the…
S Yildiz, E Dizman, Ü C Yildiz
Protection of wood for above ground application through modification with a fatty acid modified N-methylol/paraffin formulation
2007 - IRG/WP 07-40378
…Standard EN 335-1.
A formulation containing fatty acid modified N-methylol/paraffin and an aluminium salt catalyst was used to change the material properties of wood in order to protect wood from fungal decay and deterioration through weathering. Beech wood (Fagus sylvatica) treated to weight percent gains…
Nguyen Hong Minh, H Militz, C Mai
Synthesis of boric acid ammonium oleate salt for wood preservation: Leachability and termite resistance test
2007 - IRG/WP 07-30435
A new chemical compound coupling boric acid and oleic acid through a joint of ammonium salt has been produced and its synthesis followed and validated by Fourier Transformed Infra Red (FTIR). This compound named ammonium borate oleate (BAO) combining biocidal properties of boron and water…
F Lyon, A Pizzi, Y Imamura, M F Thevenon, S N Kartal, J Gril
Water repellency and dimensional stabilIty of wodd treated with waterborne resin acids/TOR
2007 - IRG/WP 07-40364
…lumber with a water repellent. The ability of resin acids, hydrophobic compounds naturally present in southern yellow pines, was examined as a possible water repellent. A waterborne resin acid or a commercial source of resin acids called tall oil rosin or TOR provided similar water repellency in laboratory…
T P Schultz, D D Nicholas, J Shi
The role of oxalic acid in tolerance to N’N-naphthaloylhydroxylamine in Tyromyces palustris
2006 - IRG/WP 06-10584
…Wood blocks exposed to T. palustris were tested for oxalic acid production at week 12. Two isolates produced more oxalic acid on NHA treated blocks than untreated SYP blocks, but we did not find any direct relationship between the amount of oxalic acid produced and the NHA tolerance of T. palustris. A separate test…
R A Arango, C A Clausen, F Green III
Addition of boron compounds and octanoic acid for improvement of biocidal properties and copper fixation at copper-ethanolamine based wood preservatives
2006 - IRG/WP 06-30408
…with other biocides like ethanolamine, boron and octanoic acid. This investigates were performance on spruce wood impregnated with different combination of copper-ethanolamine, boron and octanoic acid in aqueous solution. Copper fixation was determined according to the modified ENV 1250 standard method, while…
F Pohleven, M Humar
Performance evaluation of Borax: Boric Acid treated Green bamboo through new VAC-FRI and conventional processes
2006 - IRG/WP 06-40327
…its durability amongst traditional societies. More so one rainy season any where in the country or round the year high humidity zones in costal areas and Northeast are suitable grounds of severe sapstains or borer attacks in its products in case adequate treatments are not done. The present paper highlights this…
S Tripathi, S N Nautiyal
Influence of carboxylic acids on LEACHING of copper amine based preservatives
2005 - IRG/WP 05-30365
…ones. In order to decrease leaching, different carboxylic acids (octanoic, 2-etilheksanoic, decanoic) were added to copper/amine/boron aqueous solutions. Experiment of leaching of copper from Norway spruce (Picea abies) was performed according to the modified standard procedure (EN 1250). Results presented in this…
M Humar, P Kalan, F Pohleven
Effects of hard water, sea water and humic acid on the release of CCA components from treated wood
2005 - IRG/WP 05-50228
…using distilled water, tap water, sea water and humic acid. Results showed that percentage element leaching was decreased with tap water leaching courses compared to distilled water. Synthetic sea water caused more arsenic and less copper and chromium losses in comparison with distilled water. However humic acid…
S N Kartal, W J Hwang, Y Imamura
Response of the Formosan Subterranean Termite (Coptotermes formosanus) to Cellulose Insulation Treated with Boric Acid in Choice and No-Choice Tests.
2004 - IRG/WP 04-10532
…a cellulose insulation material containing11.1% boric acid was tested in choice and no-choice bioassays. We examined tunneling behavior and mortality of termites exposed to treated and untreated insulation material in miniature simulated wall voids. In a choice test termites tunneled through untreated…
M E Mankowski, J K Grace
Leachabilty and efficacy of fatty acid derived boron esters as wood preservatives - leachability and efficacy of fatty acid derived boron esters as wood preservatives
2004 - IRG/WP 04-30351
…vacuum treated at different concentrations of BAE (Boric Acid Equivalent) of each boron ester active ingredient with and without 10% addition of commercial resin product. Stand-alone boron treatment using 1% BAE disodium octaborate tetrahydrate (DOT) is conducted as a reference. The results of chemical analysis of…
A Mohareb, J Van Acker, M Stevens
Influence of acidification on decay processes of CCB treated wood
2004 - IRG/WP 04-10514
The phenomenon of copper tolerance by brown rot fungal strains has been known for a long period but the complete mechanism of copper tolerance by these fungi is not understood yet. Copper tolerance has previously been linked to oxalic acid excreted by copper tolerant brown rot fungal strains. This acid reacts with…
M Humar, S A Amartey, M Šentjurc, F Pohleven
Identification of phanerosporic acid in birch degraded by Phanerochaete chrysosporium
2003 - IRG/WP 03-10496
…that the metabolite is the beta-resorcylate phanerosporic acid, consistent with previous characterizations. The possible role for the metabolite in wood metabolism is discussed.
M D Mozuch, P J Kersten
Removing Cu, Cr and As from CCA treated yellow pine by oleic acid
2003 - IRG/WP 03-50202
…and 4 different pH levels (2, 2.5, 3.5 and 5) of Oleic acid was used. The leached wood samples were collected at the end of the 1, 3, 7 and 14 days to determine the remaining Cu, Cr and As concentrations. The concentrations of Cu, Cr and As were determined by X-RF. The effects of pH, dimension and duration on…
E D Gezer, Ü C Yildiz, S Yildiz, E Dizman, A Temiz
A comparison of fatty acid and molecular profiles for identification of wood colonizing basidiomycota
2003 - IRG/WP 03-20278
…employed to detect and identify wood decay fungi are Fatty Acid Methyl Ester (FAME) analysis and Restriction Fragment Length Polymorphism (RFLP) analysis. A FAME library and RFLP library for 9 species and up to 10 strains within each species have been developed. The profiles generated by these methods have been…
T C McElroy, L Prewitt, S V Diehl
Efficacy of linear chain carboxylic acid anhydrides as wood protection chemicals
2002 - IRG/WP 02-30295
…assessment of the effectiveness of linear chain carboxylic acid anhydrides namely, acetic, propionic, butyric, valeric and hexanoic anhydride, in improving the decay resistance of Corsican pine (Pinus nigra Schneid) sapwood. Wood-anhydride bond formation was verified by the increase in sample weight and volume. A…
A N Papadopoulos, M D C Hale, C A S Hill
A new concept of oxalic acid biosynthesis in physiology of copper-tolerant brown-rot fungi
2001 - IRG/WP 01-10394
Recently, a wide variety of roles of oxalic acid (oxalate) in wood decay systems have been receiving much attention. Copper tolerance of wood-rotting basidiomycetes has been believed to be due to the detoxification of copper wood preservatives by oxalate produced by these fungi. However, biochemical…
E Munir, T Hattori, M Shimada
A novel lipid-related compound, (Z)-1,7-nonadecadiene-2,3-dicarboxylic acid, produced by white-rot fungus Ceriporiopsis subvermispora
2001 - IRG/WP 01-10411
…and peroxidation of saturated and unsaturated fatty acids by Ceriporiopsis subvermispora strongly suggests involvement of lipid peroxidation in its ligninolytic system. In this paper, a new aliphatic lipid-related fungal metabolite was isolated from wood meal cultures of C. subvermispora and its chemical…
M Enoki, Y Honda, M Kuwahara, K Messner, T Watanabe