scholarly journals Durability of Superheated Steam-Treated Light Red Meranti (Shorea spp.) and Kedondong (Canarium spp.) Wood against White Rot Fungus and Subterranean Termite

2020 ◽  
Vol 12 (11) ◽  
pp. 4431
Author(s):  
Rasdianah Dahali ◽  
Seng Hua Lee ◽  
Zaidon Ashaari ◽  
Edi Suhaimi Bakar ◽  
Hidayah Ariffin ◽  
...  
Keyword(s):  
Superheated Steam ◽  
Chemical Constituents ◽  
Treated Wood ◽  
Biological Properties ◽  
Treatment Temperature ◽  
Fungal Resistance ◽  
White Rot ◽  
Subterranean Termite ◽  
White Rot Fungus ◽  
Pycnoporus Sanguineus

In this study, the effect of superheated steam (SHS) treatment on the changes of the chemical composition and biological properties of two tropical hardwoods was investigated. SHS was carried out on light red meranti (Shorea spp.) and kedondong (Canarium spp.) wood with dimensions of 410 × 25 × 25 mm, using superheated steam as the heating medium. Wood samples were heat-treated at nine treatment levels, ranging from 172 to 228 °C and 95 to 265 min, respectively. The chemical constituents and resistance against white rot fungus (Pycnoporus sanguineus) and subterranean termite (Coptotermus curvignathus) of the treated wood were evaluated. A significant reduction in holocellulose content and increment in lignin was observed after SHS treatment. Consequently, the resistance against white rot fungus and termites improved. The biological durability improved with an increasing treatment temperature and time. A regression analysis revealed that the reduced equilibrium moisture content imparted superior biological resistance to the treated wood. Weight loss caused by the thermal degradation also served as a good indicator for fungal decay, as the loss of weight was directly proportional to the improvement in fungal resistance. However, this did not apply to termite resistance, as a very weak relationship was found between the two variables.

scholarly journals Media selection for mycelia growth, antifungal activity against wood-degrading fungi, and GC-MS study by Pycnoporus sanguineus

BioResources ◽  
2011 ◽  
Vol 6 (3) ◽  
pp. 2719-2731 ◽  
Author(s):  
Yi P. Teoh ◽  
Mashitah M. Don ◽  
Salmiah Ujang
Keyword(s):  
Antifungal Activity ◽  
Water Extract ◽  
White Rot ◽  
White Rot Fungus ◽  
Gas Chromatography Mass Spectrometry ◽  
Malt Extract ◽  
Decay Fungi ◽  
Pycnoporus Sanguineus ◽  
Mycelia Growth ◽  
Property Changes

Wood-decaying fungi present a serious threat to items made from rubberwood (Hevea brasiliensis). Though conventional chemical control has been a successful method for preserving wood against stain and decay fungi growth, the effects of these chemicals are of concern because they create problems for the environment and public health. Pycnoporus sanguineus (P. sanguineus), is a white-rot fungus that invades wood during its growth, storage, or use, causing decay or other property changes. It was considered in this work as a potential source of bioactive compounds and investigated for its natural antifungal activity using a minimum inhibitory concentration assay against wood-degrading fungi. It was found that media consisting of 10.0 g/L malt extract, yeast extract, dextrose, and maltose, respectively at pH 4.7±0.2 provided the highest biomass production by P. sanguineus. Results showed that the antifungal properties of methanol and water extract of P. sanguineus mycelia and supernatant ranged from MIC values of 0.1 to 5.0 µg/µL. 4H-Pyran-4-one,2,3-dihydro-3,5-dihydroxy-6-methyl- (DDMP) was found to be the major component in the extract of this fungus, based on analysis using gas chromatography – mass spectrometry.

scholarly journals Development of the Trametes versicolor (L.) C. G. Lloyd. fungus on the wood of thermoregulated Pinus taeda L.

2020 ◽  
Vol 19 (2) ◽  
pp. 112-116
Author(s):  
Luana Maria dos Santos ◽  
Erick Martins Nieri ◽  
Flávia Alves Pereira ◽  
Sandra Mara Krefta ◽  
Jéssica Batista da Mata
Keyword(s):  
Heat Treatment ◽  
Pinus Taeda ◽  
Trametes Versicolor ◽  
Treated Wood ◽  
White Rot ◽  
White Rot Fungus ◽  
Planted Forests ◽  
Heat Treated ◽  
Loss Of Mass ◽  
Pinus Taeda L

The companies in the forestry sector seek highly durable wood, prioritizing the use of planted forests, and the thermal treatment is a viable alternative to provide quality to these woods. Thus, the objective of the study was to evaluate the resistance of the heat-treated Pinus taeda L wood by the attack of white rot fungus Trametes versicolor (L.) CG Lloyd. The P. taeda L. wood was deployed in joinery to obtain samples with dimensions of 30 x 15 x 2.5 cm (length x width x thickness), being treated at temperatures of 140, 160 and 180ºC. From these, 1.0 x 1.0 x 1.0 cm specimens were obtained and subjected to the fungus for six weeks. The accelerated rot test was carried out in accordance with the ASTM D2017 standard. The experiment was conducted in a completely randomized design with four treatments (T1 = 0; T2 = 140°C; T3 = 160°C and T4 = 180°C) and nine replications. The loss of mass caused by the fungus was less in heat treated wood. On the other hand, the increase in temperature did not provide greater resistance to the material. In conclusion, heat treatment has reduced the degradation caused by the white rot fungus Trametes versicolor. Heat treatment at 140°C is indicated to avoid loss of mass in P. taeda L. woods submitted to the fungus T. versicolor. All treated woods were classified as highly resistant.

Diversity of phenanthrene and benz[a]anthracene metabolic pathways in white rot fungus Pycnoporus sanguineus 14

2018 ◽  
Vol 134 ◽  
pp. 25-30 ◽  
Author(s):  
Xuanzhen Li ◽  
Yanshuo Pan ◽  
Sheng Hu ◽  
Yongxia Cheng ◽  
Youjing Wang ◽  
...  
Keyword(s):  
Metabolic Pathways ◽  
White Rot ◽  
White Rot Fungus ◽  
Pycnoporus Sanguineus

Biological performance of copper azole-treated wood and wood-based composites

Holzforschung ◽  
2010 ◽  
Vol 64 (3) ◽  
Author(s):  
Cihat Tascioglu ◽  
Kunio Tsunoda
Keyword(s):  
Oriented Strand Board ◽  
Medium Density Fiberboard ◽  
Treated Wood ◽  
Coptotermes Formosanus ◽  
White Rot ◽  
White Rot Fungus ◽  
Vacuum Impregnation ◽  
Decay Fungi ◽  
Biological Resistance ◽  
Copper Azole

Abstract Vacuum-impregnation with copper azole was applied as a post-treatment to five commercially available wood-based composites with thicknesses of approximately 12 mm, such as softwood plywood (SWP), hardwood plywood (HWP), medium density fiberboard (MDF), oriented strand board (OSB), and particleboard (PB). Untreated and treated composites were tested for their resistance to decay fungi (brown rot fungus Fomitopsis palustris and white rot fungus Trametes versicolor) and the subterranean termite Coptotermes formosanus by Japanese standardized laboratory test methods. Untreated MDF was highly resistant to both biological attacks and seemed to require no preservative treatment under less hazardous conditions, i.e., under protected and above-ground applications, with possible occasional wetting. PB was ranked second, and needed further protection only against C. formosanus. Copper azole did not adequately protect SWP from F. palustris and termite. OSB was not protected either against F. palustris and T. versicolor even at a concentration level of 1 kg copper azole per m3 in contrary to blocks of Cryptomeria japonica sapwood, which was protected at these concentration levels. The biological resistance of HWP was reasonably improved by copper azole. The performance of wood-based composites treated with copper azole, which was inferior to the biological resistance of treated C. japonica sapwood blocks, might depend on the thickness or layer profile, density as a result of porosity, uneven distribution of the preservative in the composites, and the susceptibility of the component raw materials.

Structural studies of two thermostable laccases from the white-rot fungus Pycnoporus sanguineus

2018 ◽  
Vol 107 ◽  
pp. 1629-1640 ◽  
Author(s):  
Marta Orlikowska ◽  
Magdalena de J. Rostro-Alanis ◽  
Anna Bujacz ◽  
Carlos Hernández-Luna ◽  
Rodrigo Rubio ◽  
...  
Keyword(s):  
White Rot ◽  
White Rot Fungus ◽  
Structural Studies ◽  
Pycnoporus Sanguineus

scholarly journals Changes in chemistry, color, dimensional stability and fungal resistance of Pinus radiata D. Don wood with oil heat-treatment

Holzforschung ◽  
2012 ◽  
Vol 66 (1) ◽  
Author(s):  
Manoj Kumar Dubey ◽  
Shusheng Pang ◽  
John Walker
Keyword(s):  
Pinus Radiata ◽  
Dimensional Stability ◽  
Linseed Oil ◽  
Treated Wood ◽  
Wood Properties ◽  
Treatment Temperature ◽  
Fungal Resistance ◽  
Oil Uptake ◽  
Remarkable Feature ◽  
Heat Treated

Abstract Pinus radiata wood specimens were heat-treated at 160–210°C in linseed oil and the effects of treatment on chemical composition, color, dimensional stability, and fungal resistance were examined. The degradation of hemicelluloses was the most remarkable feature, which is the principal reason for alterations in wood properties. Removal or migration of extractives, oil uptake and the accumulation of oil on the wood surface were observed. The color of heat-treated wood became more uniform and darker, and its dimensional stability (i.e., anti-swelling efficiency) and fungal resistance were improved by up to 60% and 36%, respectively. The viscosity of the oil after treatment was elevated with the treatment temperature and was higher in comparison to heated oil without wood present.

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