Your search resulted in 129 documents. Displaying 25 entries per page.
Ionic liquids with organic and inorganic anions as highly active wood preservatives
2006 - IRG/WP 06-30411
Quaternary ammonium tetrafluoroborates, nitrates(V), propionates, acetates and formates with alkoxymethyl substituents were prepared and tested on wood destroying and sapstaining fungi. These new compounds are ionic liquids (ILs), which penetrate very well into Scot pine wood. Alkoxymethyldecyldimethylammonium tetrafluoroborates and nitrates(V) show better microbial activity against Coniophor...
J Zabielska-Matejuk, A Skrzypczak
Phenol oxidase activity and one-electron oxidation activity in wood degradation by soft-rot deuteromycetes
2007 - IRG/WP 07-10615
Wood degradation, one-electron oxidation activity as assayed by ethylene generation from 2-keto-4-thiomethylbutyric acid (KTBA), and phenol oxidase activity were measured in cultures of six deuteromyce fungi, with glucose or wood as the carbon source. The four fungi that degraded Japanese beech wood had higher one-electron oxidation activities in wood-containing cultures than in glucose-containing...
H Tanaka, M Yamakawa, S Itakura, A Enoki
Detection of Anti-Fungal Sapwood Extractives in Non-Durable Scots Pine (Pinus sylvestris), Rubberwood (Hevea brasiliensis) and Jelutong (Dyera costulata)
2007 - IRG/WP 07-10634
A general laboratory bioassay method of Woodward and Pearce (1985) was adopted to detect anti-fungal activity of sapwood or heartwood extractives of 5 Malaysian hardwoods [dark red meranti heartwood (Shorea spp.), red balau heartwood (Shorea spp.), kulim heartwood (Scorodocarpus borneensis), jelutong sapwood (Dyera costulata) and rubberwood sapwood (Hevea brasiliensis), including the temperate Pin...
A H H Wong, R B Pearce
Effect of cinnamon oil and clove oil against major fungi identified from surface of rubberwood (Hevea brasiliensis)
2007 - IRG/WP 07-30446
Antifungal activities of cinnamon oil and clove oil at ratio 1:1 and pure against major fungi found on surface of rubberwood (Aspergillus niger, Penicillium chrysogenum, and Penicillium sp.) were investigated using the broth dilution method. The minimum inhibitory concentration (MIC) of the combined cinnamon and clove oils for these test moulds was determined to be 80 µL/mL which were less than o...
Narumol Matan, Nirundorn Matan
Investigation into the antifungal properties of herbal remedies for potential use in the wood preservation industry
2008 - IRG/WP 08-30462
The efficacy of herbal remedies as potential antifungal agents was evaluated against two sapstain and three decay fungi. Sapstain fungi included Sphaeropsis sapinea, and Leptographium procerum, and decay fungi were Oligoporus placenta, Coniophora puteana, and Schizophyllum commune.
Out of six herbal remedies tested, three showed moderate to high antifungal activity. Caprylic acid had high antif...
D O’Callahan
Quercetin - a potential compound of Azadirachta indica A. Juss. (Neem) leaves exhibiting activity against wood decaying fungi and termites
2008 - IRG/WP 08-30463
Azadirachta indica A.Juss. is widely recognized for its medicinal, insecticidal, pesticidal and anti-microbial property. Methanol extract of neem leaves revealed marked anti-fungal activity when subjected to malt-agar and soil block bioassay against wood destroying brown (Oligoporus placentus) and white rot (Trametes versicolor). The extract also revealed marked termicidal property when subjected ...
S Dhyani, S Tripathi
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 treated with bark, fruit, and leaf extracts as well as water-based wood preservative salts at various concentrations to increase fixation. The pen...
S Sen, C Tascioglu, K Tirak
Effect of wood polymers degradation during heat treatment on extracellular enzymatic activities involved in beech degradation by Trametes versicolor
2008 - IRG/WP 08-40392
Effect of heat treatment on extracellular enzymes involved in wood degradation by Trametes versicolor was investigated. Heat-treated and untreated beech blocks were exposed to T. versicolor on malt agar medium and extracellular enzymatic activities investigated. A strong ABTS oxidizing activity has been detected during the first stage of colonization in both cases, while cellulase activities are m...
S Lekounougou, G Nguila Inari, M Pétrissans, S Dumarçay, J P Jacquot, E Gelhaye, P Gérardin
Aislamiento, identificación y evaluación enzimática de hongos de pudrición de madera de la Región de los Lagos
2008 - IRG/WP 08-10680
So far, systematic investigations have not been developed to determine the fungal diversity associated with wood in Chile. In addition, little is known about the mycoflora capabilities or their enzymatic processes in biotechnology although different research has hinted at the great potential of these microorganisms in various industrial processes. The aim of this work is to isolate, identify and e...
R Ortiz, J Navarrete, C Oviedo, R Blanchette
Antinomic natural self-protection mechanism in long-lasting woods: a case study with three tropical species from French Guiana
2009 - IRG/WP 09-10696
We demonstrate in this work through 3 examples that Amazonian trees may specialize long-lasting woods by means of at least to different approaches. Wallaba impregnates its wood with large amounts of weakly antifungal compounds acting in synergy, while tatajuba and louro vermelho woods are naturally impregnated with antifungal agents. Comparison of biological activities in vitro and concentrations ...
A Rodrigues, M Royer, N Amusant, J Beauchêne, G Herbette, V Eparvier, A Thibaut, L Salmen Espíndola, B Thibaut, D Stien
Antifungal Activities of Three Supercritical Fluid Extracted Cedar Oils
2009 - IRG/WP 09-30501
The antifungal activities of three supercritical CO2 (SCC) extracted cedar oils, Port-Orford-cedar (POC) (Chamaecyparis lawsoniana), Alaska yellow cedar (AYC) (Chamaecyparis nootkatensis), and Eastern red cedar (ERC) (Juniperus virginiana L), were evaluated against two common wood decay fungi, brown-rot fungi (Gloeophyllum trabeum) and white-rot fungi (Trametes versicolor). The statistical analysi...
Tianchuan Du, T F Shupe, Chung Y Hse
Effect of juglone from Juglans mandshurica bark activity of wood decay fungi
2009 - IRG/WP 09-30502
Juglone was extracted from Juglans mandshurica bark via vacuum-assisted steam stripping. The extract was characterized by Fourier Transform Infrared Spectroscopy (FTIR), 1H Nuclear Magnetic Resonance (NMR) and Gas chromatography/mass spectrometry (GC-MS). The extraction process was easy to perform and produced excellent yields (0.22 g juglone/100 g of bark) of a high purity extract (96.42% juglone...
Dongmei Yang, Shuangyue Li, Shujun Li, Wenqiang Su, Yan Jin, Molong Sun
Synthesis of a rosin amide and its resistance to wood decay fungi
2009 - IRG/WP 09-30517
Rosin was reacted with diethyltriamine (DETA) after being modified by acryl acid with the weight ratio of 4.5:1 and a rosin amide (RA) derivative was produced at the conditions as follows: modified rosin and DETA mole ratio of 1:3.5, dimethylbenzene as water carrying agent, reaction temperature of 160-180°C, and reaction time of 8h. The chemical structure of the product as RA was identified by F...
Shuangyue Li, Shujun Li, Jing Wang
Structural changes, basidiomycete richness, enzyme activity and proteomic profiling of decay resistant and non-resistant woods over 18 months in soil contact
2010 - IRG/WP 10-10733
Wood decay fungi damage wood by production of enzymes that attack the structural components. The objective of this study was to better understand which suite of decay genes and proteins are expressed during biodeterioration of three different wood types in forest soil over time. Variation in decay genes and proteins were determined for pine (non-resistant), cedar (naturally durable), and ACQ-treat...
Youngmin Kang, S Diehl, L Prewitt, D Nicholas
Measurements of rot fungal activity as a function of moisture content by isothermal calorimetry
2010 - IRG/WP 10-20428
Measurements of heat production rate have been made on wood samples with the brown rot fungus Postia placenta at different moisture contents. The results clearly indicate that the heat production rate (a measure of respiration rate and activity) is moisture dependent. When the moisture content is decreased, less heat is produced, and when the moisture content is increased, more heat is produced. I...
L Wadsö, A Pilgård, G Alfredsen
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 Essential Oil Metabolites
2010 - IRG/WP 10-30531
New environmentally-friendly wood protection systems based on “green” technologies are needed to inhibit wood-inhabiting mold and decay fungi. Utilizing bioactive essential oils from select herbaceous plants is one promising approach, but the concentrations of bioactive compounds are somewhat variable even in the highest (therapeutic) grade essential oils. Purified primary metabolites from fou...
C A Clausen, B M Woodward, V W Yang
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
Antifungal and wood preservative efficacy of IPBC is enhanced by α - aminoisobutyric acid
2010 - IRG/WP 10-30544
There is currently a need to reduce the biocide content of wood preservatives, without
decreasing efficacy. The nonmetabolised amino acid analogue α-aminoisobutyric acid
(AIB) acts as a translocated inhibitor of mycelial spread in basidiomycete wood decay
fungi, although it does not kill the organism. Factorial combinations of AIB with either
the azole fungicide tebuconazole, or 3-iodo-2-...
P Bota, E Baines, A Mead, S C Watkinson
Measuring fungal cellulolytic enzyme activity in degrading wood
2011 - IRG/WP 11-10753
An enzyme assay which measures enzyme activity directly from wood will assist in the fundamental understanding of the enzyme components of the decay mechanism of rot fungi and any changes in the presence of wood protectants. At present, to measure fungal carbohydrate degrading enzyme activity in the presence of wood, two methods are used: either 1) the enzyme is measured in the growth media contai...
S M Duncan, J S Schilling
Antifungal activities of acetone-soluble Eusideroxylon zwageri and Potoxylon melagangai crude extracts against white rot
2012 - IRG/WP 12-30591
The development of natural wood extracts as a wood preservative is a potentially attractive prospect for the wood preservation industry. This study attempts to evaluate the toxicity of Eusideroxylon zwageri and Potoxylon melagangai extractives as potential wood preservatives. These two species are well-known as among the heaviest and very durable timbers. It has been established that natural durab...
I Jusoh, A Tida Henry, Z Assim, F Badruddin Ahmad, S Ujang
The assessment of biological and mechanical properties of wood treated with ionic liquids – N,N-dimethylamine and 1-decylimidazole derivatives
2012 - IRG/WP 12-40582
This paper presents the results of tests of the effectiveness of action of new imidazolium and bis-ammonium ionic liquids against Basidiomycotina and Ascomycotina wood-destroying fungi. All the investigated ionic liquids showed high fungicidal action against Coniophora puteana. In order to characterize the influence of ionic liquids on mechanical wood properties, the compression strength along the...
W Przybylska
Liquefaction - a functional way to manage CCB containing post-consumed wood?
2012 - IRG/WP 12-50288
The need for increased use of renewable resources put quite some attention to liquefaction of biomass, including wood. Several possible applications of liquefied wood as an alternative to petroleum based derivatives have been considered in recent years. In this paper, possibilities of wood liquefaction to manage post-consumed CCB (copper, chromium, boron) containing wood are considered, with a foc...
M Petrič, F Budija, D Hrastnik, M Humar, B Lesar
Triazole – based ionic liquids to protect of lignocellulosic materials against fungi
2012 - IRG/WP 12-30601
In presented paper we examined on biotic properties of novel structure of tebuconazole derivatieves: tebuconazole hydrochloride, allyltebuconazole chloride, methyltebuconazole iodide, tebuconazole dihydrocitrate. Our investigation against wood-degrading fungi were contained also the didecyldimethylammonium 3-aminotriazolate as well as didecyldime-thylammonium nitrate(V) with tebuconazole or wit...
J Zabielska-Matejuk, J Pernak, I Frąckowiak, A Stangierska, W Przybylska, M Kot
First report on the termiticidal activity of extracts of Annona squamosa (Annonaceae) seeds and on its active constituent squamocins
2012 - IRG/WP 12-30605
Termites inflict severe damage on wood commodities and impede usage of several forest species. The biological metabolites could potentially replace synthetic termiticidal products which are becoming more restricted to use. Annona squamosa is well known for its edible fruits - tropical custard apple. Annonaceous tetrahydrofuran acetogenins have attracted much interest due to their broad range of bi...
T S Djenontin, N Amusant, P H Ducrot, D C K Sohounhloué, D Pioch