Your search resulted in 59 documents. Displaying 25 entries per page.
Development of methodologies to evaluate tanning blocking coatings
2016 - IRG/WP 16-40760
…as their heartwood contain a significant amount of tannins which contribute to their natural durability. To avoid wood greying and dimensional variations, oak and chestnut must be protected by coatings. The European VOC Directive has been the driving force behind the change from solvent borne to waterborne…
C Reynaud, L Podgorski
Thermal durability and biodegradation of tannin lignin adhesives
2014 - IRG/WP 14-40657
Mimosa tannins and lignosulfonates were used in wood adhesives formulation to substitute resins based on formaldehyde. Mimosa tannins were mixed with either glyoxalated sodium lignosulfonates or glyoxalated ammonium lignosulfonates. The ratios of mimosa tannins and…
L Chupin, B Charrier, A Pizzi, F Charrier
Laboratory Study of Relative Leachability of Chromated Copper Arsenate Preservative from Treated Woods among Soil Types of Sarawak
2014 - IRG/WP 14-50307
…wood (Shorea macrophylla) and mangium heartwood (Acacia mangium) materials in shallow soil-burial according to the AWPA E20-04 laboratory test methodology. Statistically significant (P<0.05) variations were detected between wood species as well as leaching of CCA and its component heavy metals. Engkabang…
A H H Wong, P K F Chong
Bio-based thermoset resins for bonding and eco-friendly preservation in the wood industry
2013 - IRG/WP 13-40650
Yellow dextrins and tannins were used in wood adhesives formulation to substitute resins based on formaldehyde. Several formulations were carried out in alkaline aqueous media by varying the weight fraction of two compounds from 10% to 30%. The cross-linking was performed using…
C Motillon, A Allal, A Visse, F Charrier, B Charrier, A Baldé
Fixation and leaching characteristics of Malaysian tropical hardwoods treated with CCA-C
2012 - IRG/WP 12-50289
…preservative were examined. The species evaluated were Acacia (Acacia mangium), Bintangor (Calophyllum sp.), Geronggang (Cratoxylon arborescens), Medang (Litsea sp.), Meranti rambai daun (Shorea acuminata), Putat (Planchonia sp.), Ramin (Gonystylus sp.) and Simpoh (Dillenia sp.). The softwood radiata pine (Pinus…
S Salim, S Shahomlail, Z Ashaari, Yong-Seok Choi, Gyu-Hyeok Kim
Stained wood: The identification of natural dyes and mordants in wooden works of art
2010 - IRG/WP 10-20434
…or by means of mixtures with berberine and indigo. Tannins, in combination with iron salts, were applied to stain wood brown or black.
The results are described on the basis of investigated wooden works of art.
A Unger, W Unger
Analysis of phenolic extractives from various Tunisian species trees -Study of its potential valorisation
2010 - IRG/WP 10-30552
…trees, we studied the concentration of condensed tannins in 6 species commonly present in the Tunisian countryside: Juniperus phoenicea, Pistacia lentiscus, Pistacia Atlantica, Ceratonia siliqua, Rhus tripartitum, Punica Granatum. The study was limited to leaves, bark, roots and fruit in order to avoid…
I Oueslati, F Charrier, K Seffah, A Moubarik, N Ayed, A Zerizer, B Charrier
Moisture adsorption isotherms of wood studies using a dynamic vapour sorption apparatus
2009 - IRG/WP 09-20398
Five types of wood including two Malaysian hardwoods acacia mangium (Acacia mangium) and sesenduk (Endospermum malaccense), two temperate softwoods, Sitka spruce (Picea sitchensis), radiata pine (Pinus radiata) and Accoya (commercially modified wood) were studied to determine their moisture sorption behaviour…
J Zaihan, C A S Hill, S Curling
Some studies on natural resistance of different trees and prevention of infestation by termites through use of industrial effluents at Karor, Layyah, Pakistan
2008 - IRG/WP 08-10637
…/susceptibility in woods of Jaman (Syzygium cumini), Kikar (Acacia nilotica Willd.), Shisham (Dalbergia sissoo Roxb.), Poplar (Populus deltoids), Semal (Bombax ceiba) and Sufaida (Euclyptus camaldulensis) against subterranean termites’ infestation at Karor, Layyah, Pakistan. Wood stakes of these trees (30x12x3cm)…
S Ahmed, M Arshad Ejaz, M Asam Riaz, A Hussain
Needs for wood durability research on planted tree species in the tropics
2008 - IRG/WP 08-10651
…by an accelerated decay test according to JIS Z2101 in Acacia species, Melaleuca species, and Tectona grandis from the sapwood to the heartwood. Weight losses of the examined heartwood indicated that A. auriculiformis, hybrid Acacia and T, grandis were classified into moderately durable, A. mangium was slightly…
K Yamamoto, T Toma, Ngo Duc Hiep, Nguyen Trong Nhan
The Comparison of Fixation and Leachability of Bark, Fruit and Leaf Tannin Extracts with Boron Minerals
2008 - IRG/WP 08-30473
Tannins extracted from several plants have natural durability properties. Due to these properties, some of the researchers have studied them for protecting wood. In this study, Scots pine (Pinus sylvestris) and beech (Fagus orientalis) wood samples were…
S Sen, C Tascioglu, K Tirak
Durability of timber from exotic species against termite attack in Indian conditions
2007 - IRG/WP 07-10629
Exotic trees species, Acacia mangium Willd. and A. auriculiformis A. Cunn. ex Benth. and their hybrid are widely grown in India for multiple uses including use as timber. It is essential to know the natural durability of timbers against termites for predicting the service life of…
O K Remadevi, R Muthukrishnan
Comparative study on physical properties of four fast growing timber species of Bangladesh
2006 - IRG/WP 06-10570
…saman), Sissoo (Dalbergia sissoo Roxb.) and Akashmoni (Acacia auriculiformis) plantations are started as a fast growing timber specie from a few years back in Bangladesh. Initian objectives were to get fuel wood only from those trees, but a very positive response was found for Ghoraneem, Rain Tree, Sissoo and…
M M Islam, B K Dey, M O Hannan, G N M Ilias
Laboratory Leaching Tests to Study the Effects of Post-Treatment Storage Periods on CCA Leachability and Fixation in Treated Permeable and Refractory Malaysian Hardwoods
2006 - IRG/WP 06-50240
…malaccensis) and Perah (Elateriospermum tapos), refractory Acacia mangium] were treated with CCA to target retention of 5.6 kg/m3, immediately stored to fix at ambient conditions for 0 and 48 hours, 1, 2 and 4 weeks, followed by a 2 weeks leaching test to determine cumulative leaching losses of copper (Cu), chromium…
A H H Wong, H C Lai, N P T Lim
Need to develop processing technologies (for value addition) of the species evaluated for their properties and uses
2005 - IRG/WP 05-40307
…need no preservative treatment. Although species like Acacia crassicarpa, Cupressus goveniana, Cupressus lusitanica, Enterolobium contortisiliquum, Gironniera reticulata, Mastixia arborea and Sterculia urens are found to have a number of applications but they can not be recommended at present for different uses…
S R Shukla, S K Sharma, Y M Dubey, P Kumar, R V Rao, K S Shashidhar
Combustion properties of Alder wood treated with some new environment friendly natural extractives. Part 1. Effect of Natural Tannins on the Combustion Properties
2002 - IRG/WP 02-40234
Powders of the brutia pine bark, sumach leaves, acorn, gall-nut and boric acid and borax which are known as potential environment friendly wood preservatives were impregnated according to ASTM D 1413-88 in order to determine their combustion properties. A comm…
Ü C Yildiz, A Temiz, E D Gezer, S Yildiz
Chemically modified tannin and tannin-copper complexes as preservatives for wood
2001 - IRG/WP 01-30271
…wood with agents made by mixing chemically modified tannins with ammonia and cupric chloride. When wood powder was treated with these agents, mycelial growth and generated protein increased to some extent. The preservative effects of the chemically modified tannins (RMT and CMT) or compound agents composed of…
H Yamaguchi
The 1999-2000 annual report for the IRG - Wood Preservation in Egypt
2000 - IRG/WP 00-40188
…and amount, as Casuarina sp., Eucalyptus sp., Ficus sp., Acacia sp. Treated woods are potentially increasing in use. There are neither restriction for the use of treated woods, not any regulation concerning the desposal of these woods.
S I M Moein
Durability of plywood made from soft- and hardwoods assessed according to ENV 12038 after artificial and natural ageing
2000 - IRG/WP 00-20191
…heartwood of Douglas Fir, Scots Pine, European Oak, False Acacia and Macoré using a phenol-formaldehyde glue. The panels of 38 mm in thickness were pre-conditioned according to the following procedures: a) 12 weeks storage at 20°C/65% rh, b) 2 weeks artificial weathering (with rain and UV-radiation at changing…
H Leithoff, R-D Peek
Wood preservation in Kenya
2000 - IRG/WP 00-40190
…with only one immersion Plant (BFCA and PCP). Eucalyptus, Acacia,Cypress and some are the species commonly treated, mainly for the local market with some exports. Schedules have not been properly worked out for different end uses. Transmission, Telegraph poles and Fencing posts comprise the bulk of timber treated,…
R Venkatasamy
Alternative methodology for the environmental impact assessment of treated wood: the wood emissions ecotoxicology
2000 - IRG/WP 00-50161
…(active ingredients, modified or metabolised active, tannins, salts …). The toxicity from modelled components can moreover be different from the whole toxicity of leached components complex from wood. Furthermore, it is very difficult in the standard methodology to take the chemical speciation and…
P Marchal, H W Wegen, J Van Acker, E Melcher, R-D Peek, W J Homan, D Aston, D Rudolph, E F Baines
Termite resistance of Malaysian and exotic woods with plantation potential: Laboratory evaluation
1998 - IRG/WP 98-10280
…islands. Species included in the present report are: acacia (Acacia mangium), batai (Albizia falcataria), casuarina pine (Casuarina equisetifolia), Araucarian pine (Araucaria cunninghamii), sentang (Azadirachta excelsa), both Malaysian-grown and Burmese-grown teak (Tectona grandis), kempas (Koompassia…
J K Grace, A A H Wong, C H M Tome
Boron treatment methods for lyctid susceptible hardwoods growing in Tasmania
1998 - IRG/WP 98-30168
…and green messmate (Eucalyptus obliqua) and blackwood (Acacia melanoxylon). The treating solution in both cases was Diffusol. For vpi treatment, a solution of 2.5% boric acid equivalent (BAE) was used to treat rough sawn boards with a Bethell schedule. After treatment, boards were strip stacked on a pallet under…
L J Cookson, D Scown, K McCarthy
Termite resistance of Malaysian and exotic woods with plantation potential: Field evaluation
1998 - IRG/WP 98-10289
…Malaysian-grown and Burmese material), Hevea brasiliensis, Acacia mangium, Albizia falcataria, Araucaria cunninghamii, P. sylvestris, Koompassia malaccensis and K. excelsa. After 28 days, it was found that the results of the subterranean termite resistance test are consistent with the known/expected termite…
A H H Wong, J K Grace, L H Kirton
Toxic wood preserving chemicals in the environment: Kenya - a cause for concern
1998 - IRG/WP 98-50101-17
…associated with the species used, Eucalyptus saligna and Acacia meeansii, both of which also have heartwoods resistant to penetration. Service lives are consequently short (5 to 15 years). Constant replacements result in increased amounts of toxic chemicals leached into soils and ground water. Treated timbers…
R Venkatasamy