Your search resulted in 3324 documents. Displaying 25 entries per page.
Bio-friendly wood protection systems - resistance to mould and blue-stain fungi
2017 - IRG/WP 17-30713
With stricter restrictions on the use of biocides and increasing environmental awareness there is a pronounced need for effective bio-friendly protection systems in the wood preservative and wood coating industry. One of the possible pathways is to exploit and utilize natural substances with active biological effects. Silanes, caffeine, natural oils and potassium carbonate were chosen as compounds...
L Ross Gobakken, W Perdoch, B Mazela, P Kwaśniewska-Sip, G Cofta
Black-stain Resistant Acrylic Latexes for Wood Coatings Applications
2017 - IRG/WP 17-40786
Translucent coatings on wood in exterior applications often fail due to photodegradation and colonization by black-stain fungi and require frequent refinishing. This limits competitiveness with alternative materials. In this project, it was hypothesized that an effective dispersion of inorganic nanoparticles will provide a translucent coating with long-term resistance to black-stain fungi. Functio...
G Boivin, A M Ritcey, P I Morris, V Landry
Effects of exposure time on detection of the behavior of white-rot fungi on Oriental beech wood properties
2017 - IRG/WP 17-10902
The comparison of fungal degradation of Orientalis beechwood by two white-rot fungi was evaluated in this study. Biological, mechanical, and chemical assessments of beech wood were carried out at 30 day interval for 120 days. The results demonstrated that both fungi have greater effects on beech wood during each exposure time. However, Trametes versicolor degraded beech wood more effectively than ...
E Bari, D D Nicholas, K M Ohno
Functional silicones used for wood protection: preliminary study
2017 - IRG/WP 17-30720
Due to worldwide regulation the wood preservation domain is constantly changing. Silicones are used for different industrial applications as hydrophobic agents. This property could enable to reduce water uptake of wood treated with these compounds. Treated wood could then be less prone to dimensional variation and fungal attack, those parameters being driven by variations in wood’s moisture cont...
C Reynaud, F Marchal, F Pochon, M Kutnik
Exterior paint for the future - Will there be any dry-film preservatives left?
2017 - IRG/WP 17-50332
Wooden houses have a long tradition in several of the Nordic countries. Wood can be protected in various ways; constructional, chemically and by surface treatment. The use of various types of exterior paints as a surface treatment is a common way to prolong the durability of the wood. To further protect the painted surface against growth of fungi and algae, dry-film biocides remains an essential p...
H Jensen, M Sandve, S M Lystvet
Liquefied wood polyols: Ecofriendly bio-based preservative for sustainable protection of wood from Termite attack
2018 - IRG/WP 18-10916
The major problems encountered in both indoor and outdoor utilization of wood are biological decay due to termite. The modification of wood with liquefied wood polyols has been found to be effective against termite attack. The liquefaction of wood aims to utilize woody wastes which are being generated during primary and secondary processing of wood in wood based industry. One of promising approach...
A Kumar, A John, T S Mehra, A K Pandey, S Singh Chauhan
Assessment of the durability of a lesser known species (Borassus aethiopum Mart.) against termite and fungi from different ecozones in Nigeria
2018 - IRG/WP 18-10924
Scarcity of choice timber species in Nigeria necessitates research into alternative species. Efficient utilisation of alternative species such as Borassus aethiopum requires adequate understanding of their wood properties and within tree variations. However, information on potential of B. aethiopum as alternative to choice timber has not been adequately documented especially in the area of durabil...
O O Yekin, A R Ojo
Liquefied wood polyols: a bio-based preservative for protection of wood from fungal decay
2018 - IRG/WP 18-30725
The liquefaction of wood is one of promising approaches in utilization of woody waste which is generated during primary and secondary processing of wood and liquefied wood having various application including bio-based preservatives. The biological degradation of wood due to fungi is the major problem encountered in indoor and outdoor utilization of wood. In this study, woody waste recovered from ...
A Kumar, G Vijaylakshmi, S Singh Chauhan
Polyesterification of wood using sorbitol and citric acid under aqueous conditions
2018 - IRG/WP 18-40851
The aim of this research is to determine if the polyesterification of sorbitol and citric acid in wood has a future potential as a wood modification process. Pine wood was impregnated with an aqueous solution containing citric acid and sorbitol and was thereafter cured at 103, or 140°C for 18 hours. The dimensional stability and leaching resistance were studied for both modification temperatures....
E Larnøy, A Karaca, L R Gobakken, C A S Hill
Decay and water resistance of Siberian and European larch wood
2019 - IRG/WP 19-10941
The occurrence of larch wood is rather frequent in civil engineering. Namely, in building façades, terraces and balcony fences. In Slovenia and other central European countries, the use of the Siberian larch is especially popular. In this research, the durability against decay fungi in laboratory conditions and water exclusion ability of plantation-grown and naturally grown Siberian larch (Larix ...
B Lesar, D Krzisnik, M Humar
From fungal detoxification systems to wood durability in neotropical forests
2019 - IRG/WP 19-10946
White-rot fungi are able to mineralize all the wood components due in particular to an efficient detoxification system. We hypothesised that components of this detoxification systems, glutathione transferases, could be used as tools to explore the natural durability of neotropical wood species. Analysis of the interactions between six glutathione transferases of Trametes versicolor and extracts of...
T Perrot, G Salzet, N Amusant, J Duchene, E Gelhaye
Diversity of wood decay fungi isolated from ground-contact wood stakes in Korea
2019 - IRG/WP 19-10952
This study was conducted to investigate wood decay fungi from 5 different ground-contact wood stakes in Korea. A total of 73 basidiomycetes were isolated and identified into 20 genera and 22 species by using molecular method. Among all fungi, only 6 species were brown-rot fungi and the others were white-rot fungi. Pinus densiflora and Quercus variabilis showed high fungal diversity and isolation f...
S-M Yoon, M-J Kim, W-J Hwang, Y-S Choi, D-W Son
Identification of Antifungal Compounds in Konjac Flying Powder and Assessment against Wood Decay Fungi
2019 - IRG/WP 19-30737
The antifungal activity of konjac (Amorphophallus rivieri) flying powder (a by-product produced during mechanical processing of konjac flour) ethanol extract was evaluated against wood decay fungi in culture. Compounds associated with antifungal activity in the extracts were isolated and purified by silica gel column chromatography. The antifungal active fractions were identified by ultra-high-per...
Z Bi, F Yang, Y Lei, J J Morrell, L Yan
Relative efficacy of various oxine copper formulations against brown-rot fungi
2019 - IRG/WP 19-30741
This paper investigates the relative resistance of three different oxine copper formulations (oil-borne, water-borne, water-borne with pH-adjustment) as a preservative treatment for wood against brown-rot fungi. Impregnated southern pine sapwood cubes were exposed to R. placenta and G. trabeum cultures in a soil-block test. After eight weeks, the weight losses of the cubes were examined in relatio...
M Petruch, J Lloyd, A Taylor
Study on the ability of wood-destroying fungi to grow through chemically modified wood
2019 - IRG/WP 19-40858
Over the last decades, chemical wood modification technologies were developed to increase the resistance against attack by wood-destroying organisms without using biocides. Most of those technologies are based on an impregnation step initially. In most treated wood products, mainly by using solid wood in thicker dimensions as in posts, poles, sleepers, deckings etc. it is known that wood impregnat...
L Emmerich, S Strohbusch, C Brischke, S Bollmus, H Militz
Pigment production by the spalting fungus Scytalidium ganodermophthorum and its industry potential
2020 - IRG/WP 20-10957
Scytalidium ganodermophthorum is best known as a pathogen of cultivated mushrooms, with infected cultures turning yellow in color. The fungus is also used in the art form known as ‘spalting’ to produce yellow, green, and purple colors in wood for decorative purposes. Wood colored by fungus in this manner has been traditionally used in the creation of fine art and woodworking since the 16th cen...
R C Van Court, P Vega Gutierrez, S C Robinson
FTIR analysis of wood blocks decayed by brown-rot fungi
2020 - IRG/WP 20-10959
Calibration curves of the relative lignin contents in Cryptomeria japonica decayed by brown-rot fungi were developed with Infrared Spectroscopy and Klason technique. First, wood decay test was conducted using brown-rot fungi (Fomitopsis palusris, F. pinicola, Wolfiporia cocos, Gloeophyllum trabeum, and Neolentinus suffrutescens) and white-rot fungus (Trametes versicolor) was used as a comparison. ...
R Kondo, Y Horikawa, R Kose, M Yoshida
Effect of long-term immersion in fresh and salt water on mould growth on Scots pine (Pinus Sylvestris L.) wood
2020 - IRG/WP 20-10962
Wood exposed outdoors will eventually be degraded by fungi, depending on exposure and material characteristics. Numerous wooden constructions in the Røros municipality have existed since the 17th century, but wood used in recent repairs have decayed faster than expected. Before 1970 timber was mainly transported by log driving or rafting, and the logs were immersed in water for longer or shorter ...
M Sand Austigard, J Mattsson
Durability of acetylated Radiata pine: Laboratory tests and performance in practice
2020 - IRG/WP 20-40899
Wood acetylation is an established process to enhance biological durability and dimensional stability of lower valuable wood species without the use of biocides. Acetylated Radiata pine (ACCOYA® wood) has been on the market for more than 10 years now, starting in 2007.
Numerous lab tests have confirmed the high durability of acetylated Radiata pine. Here, additional data with four Radiata pine ...
K Jacobs, W Scheiding, B Weiß
Effect of MVOC exposure on mycelial growth of wood rotting fungi
2021 - IRG/WP 21-10977
It is well known that wood rotting fungi produce microbial volatile organic compounds (MVOCs) as metabolites. In our previous studies, we have found that some MVOCs produced by wood rotting fungi are common to fungal species tested in the studies, while others are specific to each species. Furthermore, it has been also shown that each wood rotting fungi do not always produce the same type of MVOCs...
S Horikawa, R Konuma, M Yoshida
Decomposition and metabolism of gaseous COS by wood rotting fungi
2021 - IRG/WP 21-10978
Previous studies on physiology of wood rotting fungi have mostly focused on the metabolisms of carbon and nitrogen sources. On the other hand, despite of the biological importance of minerals such as sulfur, our knowledge of their metabolic systems is limited. The sulfur source for wood-rotting fungi has been thought to be water-soluble sulfur compounds such as sulfate esters and cysteine, which a...
R Iizuka, O Iwao, Y Katayama, M Yoshida
The iron reduction by chemical components of wood blocks decayed by wood rotting fungi
2021 - IRG/WP 21-10979
Brown-rot fungi, a group of wood rotting fungi, is well known to be one of major microorganisms that cause the deterioration of wooden buildings in Japan and have been considered to use chelator-mediated Fenton (CMF) reaction in concert with hydrolytic and redox enzymes for degradation of wood cell wall. CMF can be described as a non-enzymatic degradation system that utilizes hydroxyl radicals pro...
R R Kondo, Y Horikawa, K Ando, B Goodell, M Yoshida
Dynamics of fungi colonization on the surface of Scots pine wood during natural weathering in different European climate zones
2022 - IRG/WP 22-10984
Wood The presence of fungi leads to biomaterial decay and/or changes in aesthetical appeal. The start of fungi colonization as well as the following growth on wood are primarily influenced by four factors: ambient temperature, moisture history of the object, access to oxygen, and intrinsic properties of the exposed wood, considered here as a source of nutrients for microorganisms. A prevalence of ...
F Poohphajai, O Myronycheva, O Karlsson, L Rautkari, J Sandak, A Sandak
Efficiency of three resin fractions from Aucoumea Klaineana Pierre, Canarium schweinfurthii Engl and Dacryodes edulis (G. Don) H. J. Lam from Gabon combined with Tebuconazole as wood preservatives
2022 - IRG/WP 22-10998
Pure resins from Aucoumea Klaineana, Canarium schweinfurthii and Dacryodes edulis were harvested and then hydro-distilled to obtain essential oils and purified resins fractions. Due to the potential leaching and volatility hazards of the compounds that constitute these fractions, resins and essential oils were combined with tebuconazole to produce both antifungal and anti-termite wood preservative...
W F Bedounguindzi, K Candelier, P Edou Engonga, S Dumarcay, M-F Thevenon, P Gerardin
Comparative study on the efficacy of biobased wood preservative over conventional wood preservatives against fungi and termites
2022 - IRG/WP 22-30761
The current focus of wood preservation research is on developing wood preservatives from natural and environmentally compatible compounds for industrial application. Liquefaction of wood is one of the promising approaches to utilize woody waste where the wood powder is converted into a chemically active liquid with the help of a liquefying agent like phenol, cresol, plant-based solvent as CNSL and...
A Kumar, A John, B N Hazarika