Your search resulted in 124 documents. Displaying 25 entries per page.
In vitro fungicidal activity of Tunisian essences extracts against Coriolus versicolor and Coniophora puteana
2014 - IRG/WP 14-20544
Bark of six Tunisian species including cork oak (Quercus suber L.), eucalyptus camaldulensis, alder (Alnus glutinosa), Aleppo pine (Pinus halepensis), nut pine (Pinus pinea) and Chelfi pomegranates (Punica granatum) were tested against two rot-fungi: Coriolus Versicolor (for leafy trees) and Coniophora Puteana (for conifers) according to an adaptation of the European guidelines (NF EN 113, 1986). ...
L Lajnef, N Ayed, B Charrier
Scanning Transmission X-ray Microscopy as a tool for examining chemical changes in wood cell walls due to enzymatic activity
2014 - IRG/WP 14-20556
As development of techniques for examining enzymatic activity on solid, complex biological materials, is considered to be an important factor in further development of enzyme applications and for understanding the decay of plant materials, this study explores applicability of Scanning Transmission X-ray Microscope (STXM) for determining chemical changes in enzymatically treated samples at the cell...
D Jeremic, R Goacher, R Yan, C Karunakaran, E R Master
Coconut shell pyrolytic oil as wood protectant against biodeterioration
2014 - IRG/WP 14-30648
Extensive research on various plant and microbial extracts has been conducted as an alternative to using synthetic or inorganic chemicals for wood protection. Development of effective and low environmental impact products and technologies for wood protection is imperative. In the present study, the efficacy of coconut shell pyrolytic oil as a wood protectant is analysed in terms of its antifungal,...
K S Shiny, O K Remadevi
Characterization of waste from Pinus radiata generated during industrial thermal-treatment
2016 - IRG/WP 16-20586
The thermal-treatment is an established chemical-free process to modify wood, improving the durability and physical properties of wood through its service life. During the hydro-thermolysis several reactions from wood components occur, releasing volatile and non-volatile compounds from wood to the chamber. Once the process is accomplished, solid residues agglomerate below the wood load and gaseous...
R Herrera, D Thomas da Silva, R Llano-Ponte, J Labidi
Anti-Fungal Activity on Some Wood extracts as a Wood Protectant
2016 - IRG/WP 16-30684
In this study, six different wood barks were used, where obtained bark extracts were blended with potato-agar in order to investigate their antifungal properties. To determine the inhibition effectiveness of extractives, two different fungi; Coniophera puteana and Trametes versicolor were selected. Fungal activity was carefully observed for the duration of seven days. Following biological testing,...
Ö Özgenç, S Durmaz
Activity of wood preservatives against mould fungi
2016 - IRG/WP 16-30695
The resistance of experimental and commercial wood preservatives to mould fungi was determined using a method recommended by the Building Research Institute Instruction. The research of the inhibiting actions of the growth of fungi was carried out on the Scots pine wood Pinus sylvestris L. and beech Fagus sylvatica L. The most active compounds against mould were experimental herbicidal ionic li...
J Zabielska-Matejuk, A Stangierska
Fungistatic activity of quinolizidine and bisquinolizidine alkaloids against A. niger
2016 - IRG/WP 16-30699
In order to determine the relation between the structural properties and fungistatic activity of quinolizidine and bisquinolizidine alkaloids, the bioactive derivatives of cytisine, sparteine and lupanine were tested for the inhibitory activity against the microfungus causing mould growth phenomenon (Aspergillus niger van Tieghem ATCC 6275). The compounds tested were screened for antifungal prope...
P W Kwaśniewska-Sip, G Cofta, B Mazela, L Ross Gobakken, A K Przybył
Chemical compositions and anti-termite activities of essential oils from Gabonese Canarium schweinfurthii Engl, Dacryodes buettneri Engl and Aucoumea klaineana Pierre wood resins.
2017 - IRG/WP 17-10895
Essential oil extract from resins of Canarium schweinfurthii, Dacryodes buettneri and Aucoumea klaineana woods from Cap Esterias and Oyem areas, Gabon, were prepared by Clevenger - steam distillation. The chemical compositions of these respective essential oils were analyzed by a Gas Chromatography coupled with Mass Spectrometry (GC-MS). Although monoterpenes were the main constituents of the thre...
Chemical compositions and anti-termite activities of essential oils from Gabonese Canarium schweinfurthii Engl, Dacryodes buettneri Engl and Aucoumea klaineana Pierre wood resins.
Activity of Two Strobilurin Fungicides Against Three Species of Decay Fungi in Agar Plate Tests
2017 - IRG/WP 17-30704
The objective of this study was to examine the toxicity of strobilurin fungicides against wood decay fungi in order to assess their potential to act as a co-biocide for copper-based wood protection. Two strobilurin fungicides, Heritage (50% azoxystrobin active ingredient) and Insignia (20% pyraclostrobin active ingredients), and copper sulfate pentahydrate were tested against one white rot fungus...
J D Tang, T Ciaramitaro, M Tomaso-Peterson, S V Diehl
Anti-fungal activity of rutin and rutin-metal complexes as wood protectants
2017 - IRG/WP 17-30708
The anti-fungal activity of Rutin, a flavonoid, alone or complexed with copper or zinc was investigated in a petri dish test with Gloeophyllum trabeum and Trametes versicolor as the test fungi. Rutin and the Rutin-metal complexes showed significant inhibition against each fungus. Rutin-Cu and Rutin-Zn strongly inhibited the brown rot fungus, G. trabeum, while Rutin and Rutin-Zn inhibited T. versic...
Li Yan, J J Morrell, Jie Zhong, Xiuzhu Mao
Effects of heat treatment on sound absorption coefficients in nanosilver-impregnated and normal solid woods
2017 - IRG/WP 17-40770
Effects of impregnation with silver nano-suspension as well as heat-treatment on sound absorption coefficients (AC) were studied in tangential direction of five different solid woods based on their importance. AC was measured at two frequencies of 250 and 500 Hz. A 400 ppm nanosuspension was used for the impregnation; silver nanoparticles had a size range of 30-80 nm. Based on the obtained results...
A Esmailpour, J Norton, H R Taghiyari, H Zolfaghari, S Asadi
Analysis of Wood Industrial Pollutants Based on Emission Coefficients
2017 - IRG/WP 17-50325
Accurate calculation and estimation pollutants is one of the basic tasks of environmental protection .The low carbon economy put forward However，low carbon economy data of wood industry is lack. The paper research on emissions and pollution of Chinese wood industry. The results showed dust emissions from much to least is: fiberboard, plywood and particle board; the amount of industrial ...
Chu Jie, Ma Ji, Zhangjing Chen
Chemical composition and termiticidal activity of Khaya ivorensis stem bark extracts on woods
2018 - IRG/WP 18-30723
The genus Khaya is extractives rich, but the extractives in the stem bark are among the most abundant, accessible and utilised materials in Nigeria. These extractives are of considerable interest for wood protection because of their pesticidal properties. In this study, the chemical constituents of Khaya ivorensis stem bark (KISB) and their termiticidal activity were investigated on Triplochiton s...
G A Adedeji, O Y Ogunsanwo, F S Eguankun, T O Elufioye
Chemical defense of trees and wood natural durability: from protection to valorization
2019 - IRG/WP 19-10943
Natural durability of wood is defined as “the inherent resistance of wood against various wood-destroying organisms” (European standard EN 350-1). This property is due in particular to heartwood extractives. However, the wood natural durability is included in a wider defense system, and other organs such as bark and roots also host protective compounds. Studying the mechanisms on which global ...
E Houel, D Stien, N Amusant
Chemical composition, antitermite and antifungal activity of Dacryodes edulis oleoresin
2019 - IRG/WP 19-20653
Damages to wood structures and other cellulosic materials caused by wood destroying insects and fungi are estimated to several billions of dollars each year in the world. Among these, termites are considered as one of the most economically important pests for wooden structures. In the past, several wood protection chemicals like CCA, creosote, lindane or pentachlorophenol have been used. However, ...
W F Bedounguindzi, K Candelier, P E Engonga, Se Dumarcay, M-F Thevenon, P Gerardin
Extraction, identification and antifungal activity of polar extractives originated from various wood species
2020 - IRG/WP 20-20673
Extractives are non-cell wall small molecules present in wood and other lignocellulosic materials that can be removed by solvents. Although they represent a minor fraction in comparison with the structural cell wall components, they are an important source of functional groups or molecules with bioactivity or antioxidant properties, that could be used in medicine, cosmetic or wood preservation. T...
R Herrera, F Poohphajai, J Labidi, S Willför, A Sandak
Comparison of AE-apparatus for detection of activity of Old house borer larvae, including reality check
2021 - IRG/WP 21-10981
As part of the German funded project ‘InsectDetect’ comparative measurements were done with three different Acoustic-Emission-(AE)-apparatus on 14 pine beams in order to assess presence of active attack by the Old house borer (Hylotrupes bajulus (L.)).
In all beams active attack was measured, though in varying intensity. This was corroborated by completely dissecting 10 of the beams. All thre...
J Creemers, B Plinke, U Noldt
Role of microbiota in wood degradation by Reticulitermes grassei and Bursaphelenchus xylophilus
2022 - IRG/WP 22-20684
Xylophagous organisms can cause damage both in forests and in felled wood. Bursaphelenchus xylophilus, which causes "Sudden Pine Wilting" in coniferous forest masses, and is currently considered a quarantine organism in the European Union. On the other hand, structural and carpentry wood is affected by subterranean termites (Reticulitermes spp.), that cause serious damage, both in buildings and fu...
L Robertson, S Rames, M Uriel, J M González, F Llinares, S M Santos, M T Troya
A new approach to wood protection: Potential of biologically synthesised CuO and ZnO nanoparticle formulation as a wood preservative
2022 - IRG/WP 22-30758
Even though metal nanoparticles are effective in protecting wood, they are less preferred, as they are synthesised using methods which are expensive and are not environmentally friendly. Biological synthesis of nanoparticles using plants, fungi, yeast, bacteria and viruses, has been accepted as an alternative approach and is referred to as green synthesis. Utilization of biologically synthesised n...
Shiny K S, R Sundararaj, N Mamatha
Biocomposites based on PVA, cellulose nanofibrils and tannic acid
2022 - IRG/WP 22-40957
Biocomposite films based on a polyvinyl alcohol (PVA) with the addition of cellulose nanofibrils (CNF) as a reinforcing component and with the addition of the biologically active tannic acid (TA) were prepared. The influence of different additions of CNF and TA in the polymer matrix PVA on the mechanical properties, improvement of hydrophobicity of the prepared films was studied. In all cases, the...
U Osolnik, V Vek, I Poljanšek, Poven
Isolation of the microbiota from wood decay insects and some of their enzymatic activities
2023 - IRG/WP 23-11014
Wood decay organisms have the ability to degrade wood components (cellulose, hemicellulose and lignin) by enzymatic capacities, but these enzymes can belong to the proper organism, or to the associated microbiota. The identification of the microorganisms, as well as their role in the digestion of many substrates not always is very well known.
The wood decay insects produce big damages in wood str...
M T Troya, F Llinares, J Arranz, S Izpura-Luis, S M Santos, L Robertson
Effect of volatile organic compounds produced by wood rotting fungi on mycelial growth
2023 - IRG/WP 23-11023
Microorganisms such as fungi or bacteria produce volatile organic compounds (so-called MVOCs: Microbial Volatile Organic Compounds) as metabolites. Some MVOCs have been found to be biologically active, for example inhibition of spore germination, and when fungi of different species encounter each other, the MVOCs pattern change, suggesting that MVOCs play a role as a mediator for biological intera...
S Horikawa, R Konuma, M Yoshida
Structure bioactivity relationships of softwood knot extracts
2023 - IRG/WP 23-11026
Antibacterial, antifungal and radical scavenging activities of knots of three softwood species have been investigated to evaluate the role of higher amounts of extractives present in knots. The results showed than Douglas fir presented higher scavenging activity than fir and spruce, which present more or less the same activities. Fir and spruce extracts presented higher antibacterial activities th...
P Gérardin, P Gérardin, D Hentges, S Dumarçay, C Audouin, C Gérardin-Charbonnier
X-ray fluorescence microscopy of copper ion distribution in decay of copper-treated wood by Fibroporia radiculosa
2024 - IRG/WP 24-11047
Copper is an essential metal ion for eukaryotic life and must strictly be regulated as excess levels can cause oxidative damage, enzyme inhibition and denaturation, interruptions in nutrient transport and even cellular death. Copper-based wood treatments have efficacy against a wide range of biological organisms including decay fungi and are used in the majority of preservative formulations for ou...
K M Ohno, J Jakes, A B Bishell, L Li, Q Jin, E Maxey