Your search resulted in 1011 documents. Displaying 25 entries per page.
Susceptibility to filamentous fungi of plywood for furniture coated with waterborne acrylic lacquers
2017 - IRG/WP 17-40778
Filamentous fungi (mould), thanks to their little trophic requirements belong to organisms which grow exceptionally easy and fast in favorable hygrothermal conditions and attack both organic and inorganic materials even with only trace amounts of organic substances on the surface. The fungi often cause spoilage of foodstuffs, worsen the aesthetic of wood-based elements, and pose a threat to the en...
A Fojutowski, M Nowaczyk-Organista, P Hochmańska
Hybrid green composites manufactured with glass fiber and jute fabric skin by VARTM process: Fungal, mold, and termite resistance tests
2017 - IRG/WP 17-40780
Hybrid green composites are increasingly used in building applications due to the development of new production approaches. Biological performance of such composites is needed when they are employed in extreme conditions. Hybrid composite panels were manufactured by wood furnish, glass fiber, and jute fabric skin by the vacuum assisted resin transfer molding (VARTM). Petri dish test method was fol...
S N Kartal, E Terzi, M Muin, A H Hassanin, T Hamuoda, A Kilic, Z Candan
Agar block durability test of plywood made of neem (Azadiracta indica) leaves treated veneer using two white rot fungi
2017 - IRG/WP 17-40782
This study has been undertaken to investigate the durability of plywood made from non-durable wood (simul, Bombax ceiba) veneer treated by neem (Azadiracta indica, A. Juss.) leaves. The veneers were treated with cold and hot water solution of neem leaves of different concentrations (10%, 5%, 2.5%) and treatment durations (1, 2, 3 days) for cold water and 20, 40 and 60 minutes for hot water. The pl...
K Akhter, M A Hashem, S Akhter
The Comparison of Weathering Resistance of New Generation Wood-Coating Systems
2017 - IRG/WP 17-40789
In this study, the performance of wood-coating systems containing different UV absorbers was evaluated in artificial weathering conditions. Acrylic-based resin containing three different UV absorbers was applied on oriental beech and scots pine surfaces. Weathering conditions were sustained for 84 days. After the weathering test, the change of color and roughness on the wood surface was measured t...
Ö Özgenç, S Durmaz
Decay resistance of beams made from thermally modified Scots pine and Norway spruce after 6 years’ exposure in ground contact
2017 - IRG/WP 17-40806
In the present study the resistance of beams treated by ThermoWood® process was studied in ground contact and the results given are based on a “modified” EN 252 test. After six years’ exposure clear differences were found between untreated Scots pine and Norway spruce beams and treated ones. In all cases thermal modification improved the performance. Thermally modified pine heartwood showed...
S Metsä-Kortelainen, H Viitanen
Decay resistance variability of European wood species thermally modified by industrial process
2017 - IRG/WP 17-40807
Thermal modification is now considered as a new ecofriendly industrial wood modification process improving mainly the material decay resistance and its dimensional stability. Most industrial thermal treatment processes use convection heat transfer which induces sometimes heterogeneous treatment temperature propagation within the oven and lead to the heterogeneity in treatment efficiency. Thus, it ...
K Candelier, L Pignolet, S Lotte, A Guyot, E Cuny, B Bousseau, M-F Thévenon
Biodegradation of creosote by white rot fungus Phanerochaete chrysosporium and a strains of Pseudomonas
2017 - IRG/WP 17-50329
The aim of this study was to determine degradation effectiveness of polycyclic aromatic hydrocarbons (PAH) contained in creosote by white rot fungus and bacteria. The following two species of bacteria Pseudomonas putida and Pseudomonas sp. as well as Phanerochaete chrysosporium fungus characterised by the ability to decompose aromatic compounds were selected for experiments. Bacterial strains were...
J Zabielska-Matejuk, A Stangierska, A Kropacz, E Kaczorek
Testing of the resistance of acetylated wood against marine borers at three Italian sites
2017 - IRG/WP 17-30719
The aim of this research is the determination of resistance of acetylated wood against marine biodeterioration in use class 5 (EN 335) in temperate sea waters. The resistance of acetylated Pinus radiata (radiate pine) in solid and MDF form is compared with that of the untreated radiata pine and other untreated wood of European species such as Fagus sylvatica (European beech) Castanea sativa (chest...
S Palanti, M Faimali, D Tagliapietra, M Andrenacci, M Anichini, M Sigovini
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
UV-curable coatings developed for aesthetic and biological protection of wood outdoors
2017 - IRG/WP 17-40821
To avoid wood greying, dimensional variations, and degradation by biological agents wood is protected with preservation products and coatings when used outdoors. For some wood species used for cladding, a treatment with a preservation product is required, and is frequently additionally protected with a coating. In this study, Mäder Group developed a new UV-curable coating for outdoors application...
C Reynaud, A S Schuller, M Kutnik, L Podgorski
Interactions between wood polyphenols and detoxification enzymes of the white rot Trametes versicolor
2018 - IRG/WP 18-10906
Wood decay fungi have complex detoxification systems that enable them to cope with secondary metabolites produced by plants. Although the number of genes encoding for glutathione transferases (GSTs) is especially expanded in lignolytic fungi, little is known about their physiological target molecules. In this study, by combining thermal shift assay and affinity crystallography we highlighted inter...
M Schwartz, T Perrot, E Aubert, S Dumarçay, F Favier, P Gérardin, M Morel-Rouhier, G Mulliert, F Saiag, C Didierjean, E Gelhaye
Enhancing Our Understanding of Brown Rot Mechanisms through Catalytic Pretreatment and Cellulase Cocktail
2018 - IRG/WP 18-10909
A catalytic mechanism, described as the “chelator-mediated Fenton” (CMF) mechanism, is proposed to mimic the non-enzymatic action of brown rot fungi. A CMF treatment was used together with an enzymatic cocktail to study how wood was deconstructed and solubilized. This was done in-part to determine if the treatment mimicked the action of brown rot fungi, but also to explore improved treatment p...
S Tabor, L Orjuela, D Contreras, G Alfredsen, J Jellison, S Renneckar, B Goodell
Termite resistance of wood-plastic composites made with acetylated wood flour, coupling agent or zinc borate
2018 - IRG/WP 18-10917
There is little published scientific literature on the laboratory or field testing of wood-plastic composites (WPC) against termite attack. Therefore, the objective of this research was to investigate termite resistance (both laboratory and field) of 5 different extruded WPC blends of 50% western pine wood flour (WF) and high-density polyethylene (HDPE), and untreated pine solid wood. The study in...
R E Ibach, Y S Hadi, C M Clemons, S Yusuf
Understanding of the effect of ancestral and natural saltwater treatment on durability, fibers densification and chemical modification of palm wood
2018 - IRG/WP 18-10921
The palm-tree sector plays a very important role on both the socioeconomic and ecological levels, in Tunisia. There are three million trees in Tunisian palm plantations, ensuring a potential significant wood production, mainly in the craft and furniture industries.
In the past, Date Palm wood (Phoenix dactylifera L.,) was also used as structural material. Its low natural durability and its low m...
M T Elaieb, A Namsi, M Tella, M-F Thévenon, K Chandelier
Impact of sapwood portions on the durability of adjacent heartwood of Pinus sylvestris, Pseudotsuga menziesii and Quercus robur. Part 1: Laboratory studies
2018 - IRG/WP 18-10922
Sapwood is generally considered as non-durable and assigned to durability class DC 5 according to European standards independent from the wood species. It is commonly agreed that sapwood decays faster than adjacent heartwood, but it is controversially discussed whether sapwood serves as feeder material and thus accelerates onset and progress of decay in more durable heartwood or decays independent...
C Brischke, P Homann, A Gellerich
Use of x-ray microdensitometry for assessing the resistance to the fungus C puteana of a hybrid larches population
2018 - IRG/WP 18-10923
The aim of this research was to utilize the X-ray microdensitometry to determine the natural durability and its variability of a hybrid larch population. The method was applied on slices obtained by increment cores collected on standing trees before cutting them down. The methodology was discussed also in order to propose as a new screening method especially suited for trees populations. X-ray mic...
S Palanti, F Alderighi, F Stefani, J P Charpentier, L E Pâques
Natural resistance of Bambusa vulgaris to termite and powder-post beetle attack in laboratory and graveyard tests
2018 - IRG/WP 18-10925
Deterioration is the major setback to the utilisation of bamboo products. To enhance bamboo utilization, an understanding of the level of resistance to degradation is important. In this study, level at which Bambusa vulgaris will naturally resistant attack by subterranean termites and powder-post beetles were evaluated. B. vulgaris aged 2, 3 and 4 years were subjected to attack by subterranean ter...
N A Sadiku, S O Bada
Material Resistance and Chemical Composition of Italian Stone Pine (Pinus pinea)
2018 - RG/WP 18-20645
Relevant properties of stone pine (Pinus pinea) wood have been only fragmentarily addressed in the past, which has been recognized as a limiting factor for its potential applications. The amount of the respective wood species on the market will likely increase in the future. The sorption properties, permeability to water, extractives content and durability against fungi of Pinus pinea sapwood and ...
M Humar, M De Angelis, M Romagnoli, V Vek, I Poljanšek, P Oven, N Thaler, B Lesar, D Kržišnik
Mechanism of nano metal fluorides against fungi
2018 - IRG/WP 18-30730
Metal fluoride nanoparticles are promising because of their low water solubility, which reduces the need for fixatives required in widely used active ingredient in wood preservatives such as copper and boron. Wood specimens treated with fluoride sols of MgF2 and CaF2 have been tested against brown-rot fungi (Coniophora puteana and Rhodonia placenta) in accordance with EN 113 and against termites (...
S M Usmani, K Klutzny, I Stephan, T Hübert, E Kemnitz
FTIR-ATR monitoring of chemical changes of thermo-chemically modified beech wood degraded by brown-rot fungus
2018 - IRG/WP 18-40823
Wood chemical modification with lactic acid oligomers (OLA) has been reported to confer promising properties for wood outdoors applications. To better understand the lactic acid interaction with wood, chemical changes following biological degradation have been characterized with a battery of tests. Fourier transform infrared (FTIR) spectroscopy has been proved to be a valuable tool for studying fu...
C Grosse, M Noël, M-F Thevenon, P Gérardin
Resistance of modified wood to termite attack assessed in laboratory and field testing: A review of internal research
2018 - IRG/WP 18-40824
Within the past decades, new wood modification technologies have been investigated in order to improve certain wood characteristics and enable the use of timber products for outdoor applications. Some of these non-biocidal technologies have been developed and commercialized recently. Thus, various material properties were studied intensively and shown to be improved. To a great extent, previous re...
L Emmerich, P Gascón-Garrido, H Militz
Multiscale modification on water resistance and dimensional stability of Populus cathayana by alkali lignin combined with heat treatment
2018 - IRG/WP 18-40826
The aim of this study was to enhance the water resistance and dimensional stability of fast growing wood by alkali lignin combined with heat treatment. Poplar (Populus cathayana) samples were first impregnated with alkali lignin solution and then subjected to heat treatment at 140, 160, and 180°C respectively for 2h. Properties of leachability, moisture adsorption and water absorption, contact an...
H Zhou, J Li, E Ma
Recent findings clarifying the mechanism of brown-rot decay protection in acetylated wood
2018 - IRG/WP 18-40827
This paper summarizes the findings obtained during my PhD research over the past three years. The results provide insights which help to understand the enhanced brown-rot decay resistance of acetylated wood with particular emphasis on the role of water. The protection acetylation provides is derived from moisture exclusion within the acetylated cell wall, but the exact mechanism by which water is ...
G Beck
Selection of heat flux value for wood fire retardants testing using MLC
2018 - IRG/WP 18-40846
One of more crucial elements of investigating treated wood combustion properties with the use of a cone calorimeter is a proper selection of heat flux (HF). The HF level is directly reflected in time to ignition and a thermal degradation degree. The ignition of raw wood or of wood ineffectively protected against fire occurs at a low HF level, i.e. 10-20 kW/m2. By contrast, the ignition of wood whi...
B Mazela, W Perdoch, W Grześkowiak, A Batista
The biodegradation of creosote oil by various species of white rot fungi and bacteria isolated from the contaminated soil
2018 - IRG/WP 18-50334
The aim of the study was to determine biodegradation effectiveness of the selected polycyclic aromatic hydrocarbons (PAHs) contained in creosote oil, by two white rot fungal species (Bjerkandera adusta and Irpex lacteus) and three bacterial species (Pseudomonas putida, Pseudomonas sp. OS4 and Rahnella aquatilis). Bacteria were isolated from the soil contaminated with petroleum hydrocarbons from th...
M Sydow, J Zabielska-Matejuk, E Kaczorek, AStangierska, A Kropacz