Decay resistance of thermally modified Eucalyptus grandis wood against wild strains of Trametes versicolor and Pycnoporus sanguineus

2021 ◽  
pp. 1-10
Author(s):  
Leandro Cantera ◽  
Raquel Alonso ◽  
Sandra Lupo ◽  
Lina Bettucci ◽  
Agostina Amilivia ◽  
...  
Keyword(s):  
Trametes Versicolor ◽  
Eucalyptus Grandis ◽  
Decay Resistance ◽  
Pycnoporus Sanguineus ◽  
Wild Strains

scholarly journals Durabilidade natural de painéis aglomerados confeccionados com Eucalyptus grandis e Bambusa vulgaris em ensaio de apodrecimento acelerado

2011 ◽  
Vol 41 (8) ◽  
pp. 1369-1374 ◽  
Author(s):  
Diego Martins Stangerlin ◽  
Rafael Rodolfo de Melo ◽  
Alencar Garlet ◽  
Darci Alberto Gatto
Keyword(s):  
Trametes Versicolor ◽  
Eucalyptus Grandis ◽  
Gloeophyllum Trabeum ◽  
Bambusa Vulgaris

O conhecimento acerca da resistência dos compostos ligno-celulósicos ao ataque de microrganismos é primordial para servir de base à prevenção da deterioração e a correta destinação de emprego do material. Nesse sentido, avaliou-se a resistência natural a fungos apodrecedores de painéis aglomerados confeccionados com partículas de madeira (Eucalyptus grandis) e/ou bambu (Bambusa vulgaris). Foram produzidas, em laboratório, chapas aglomeradas nas dimensões 50x50x0,95cm e massa específica pré-estabelecida em 0,70g cm-3, nas proporções de 100:0, 75:25, 50:50, 25:75 e 0:100 de madeira e bambu, respectivamente. A massa de partículas representou 91% da massa seca de cada painel, sendo, o restante, formado pelo adesivo ureia-formaldeído (8%) e parafina (1%). Para determinação da resistência natural ao ataque de fungos xilófagos, os painéis foram testados em laboratório e utilizados os fungos Gloeophyllum trabeum (podridão parda) e Trametes versicolor (podridão branca), de acordo com a ASTM D 2017 (2005). Quanto aos resultados, foi observado que os painéis confeccionados com mistura de partículas de madeira e bambu apresentaram menor resistência ao ataque dos fungos apodrecedores. Painéis que utilizaram apenas bambu ou madeira apresentaram resistência biológica semelhante. Dentre os fungos, T. versicolor atacou mais severamente os painéis.

scholarly journals Decay resistance of acetic, propionic and butyric anhydrides modified rubberwood against white rot (Trametes versicolor)

2018 ◽  
Vol 30 (2) ◽  
pp. 163-174
Author(s):  
Hisham HN ◽  
Nuraishah H ◽  
Fitri-Yazid Z ◽  
Paridah MT ◽  
Salmiah U
Keyword(s):  
Trametes Versicolor ◽  
Decay Resistance ◽  
White Rot

Decay resistance of softwoods and hardwoods thermally modified by the Thermovouto type thermo-vacuum process to brown rot and white rot fungi

Holzforschung ◽  
2016 ◽  
Vol 70 (9) ◽  
pp. 877-884 ◽  
Author(s):  
Jie Gao ◽  
Jong Sik Kim ◽  
Nasko Terziev ◽  
Geoffrey Daniel
Keyword(s):  
White Rot Fungi ◽  
Brown Rot ◽  
Decay Resistance ◽  
Fungal Species ◽  
White Rot ◽  
Agar Block ◽  
Pycnoporus Sanguineus ◽  
Postia Placenta ◽  
Soil Block ◽  
Class 1

Abstract Softwoods (SW, spruce and fir) and hardwoods (HW, ash and beech) were thermally modified by the thermo-vacuum (Termovuoto) process for 3–4 h in the temperature range 160–220°C (TMW160–220°C) and their fungal durability were examined in soil-block tests with two brown rot (BR, Postia placenta, Gloeophyllum trabeum) and two white rot (WR, Pycnoporus sanguineus, Phlebia radiata) fungi. SW-TMW160–220°C were exposed to P. placenta and P. sanguineus and HW-TMW190–220°C to all fungal species. Considerable improvement (durability class 1–3) in decay resistance was only achieved for SW- and HW-TMW220°C. Thermal modification (TM) below 200°C influenced decay resistance negatively in case of some fungal species applied for both SW and HW. Judged by the durability class, decay resistance was higher in HW- than in SW-TMW at high TM temperature. Behavior of TM differed significantly between ash (ring-porous HW) and beech (diffuse-porous HW). A comparison between results of soil- and agar-block tests on Termovouoto wood demonstrated that the influence of testing method in terms of assignment to durability classes is not significant.

scholarly journals Outdoor Wood Mats-Based Engineering Composite: Influence of Process Parameters on Decay Resistance against Wood-Degrading Fungi Trametes versicolor and Gloeophyllum trabeum

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3173
Author(s):  
Minzhen Bao ◽  
Neng Li ◽  
Yongjie Bao ◽  
Jingpeng Li ◽  
Hao Zhong ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Mass Loss ◽  
Process Parameters ◽  
Trametes Versicolor ◽  
Decay Resistance ◽  
Resin Content ◽  
White Rot ◽  
White Rot Fungus ◽  
Gloeophyllum Trabeum ◽  
Influence Of Process Parameters

The process parameters significantly influence the preparation and final properties of outdoor wood mats-based engineering composite (OWMEC). During outdoor use, wood composites are susceptible to destruction by rot fungi. Herein, the role of process parameters such as density and resin content on OWMEC resistance to fungal decay was investigated. The poplar OWMEC samples were exposed to white-rot fungus Trametes versicolor and brown-rot fungus Gloeophyllum trabeum for a period of 12 weeks. The chemical composition, crystallinity, and morphology were evaluated to investigate the effect of process parameters on the chemical composition and microstructure of the decayed OWMEC. With an increase in the density and resin content, the mass loss of the decayed OWMEC decreased. The highest antifungal effect against T. versicolor (12.34% mass loss) and G. trabeum (19.43% mass loss) were observed at a density of 1.15 g/m3 and resin content of 13%. As results of the chemical composition and microstructure measurements, the resistance of OWMEC against T. versicolor and G. trabeum fungi was improved remarkably by increasing the density and resin content. The results of this study will provide a technical basis to improve the decay resistance of OWMEC in outdoor environments.

scholarly journals Resistência natural de seis espécies de madeiras da região amazônica a fungos apodrecedores, em ensaios de laboratório.

2006 ◽  
Vol 16 (1) ◽  
pp. 17 ◽  
Author(s):  
Marcus Vinicius da Silva Alves ◽  
Alexandre Florian da Costa ◽  
Daniele Da Silva Espig ◽  
Ailton Teixeira do Vale
Keyword(s):  
Laboratory Test ◽  
Standard Method ◽  
Decay Resistance ◽  
Gloeophyllum Trabeum ◽  
Pycnoporus Sanguineus ◽  
American Society ◽  
Natural Decay

O presente trabalho avaliou a resistência natural das madeiras de Aspidosperma desmanthum (Araracanga), Parinari excelsa (Parinari), Mouriri callocarpa (Miraúba), Marmaroxylon racemosum (Angelim-rajado), Peltogyne paniculata (Roxinho) e Astronium sp. (Muiracatiara) aos fungos causadores de podridão-branca Pycnoporus sanguineus e podridão-parda Gloeophyllum trabeum, em ensaios de laboratório. A determinação da resistência natural foi feita por meio da avaliação da perda de massa, com base na norma da American Society for Testing and Materials - Standard Method for Accelerated Laboratory Test of Natural Decay Resistance of Woods - ASTM D2017/81(86). Todas as espécies se apresentaram muito resistentes aos fungos Pycnoporus sanguineus e Gloeophyllum trabeum, exceto Aspidosperma desmanthum que mostrou ser resistente ao fungo de podridão parda. A espécie Peltogyne paniculata mostrou-se a mais resistente ao fungo Pycnoporus sanguineus, enquanto Parinari excelsa apresentou-se como a espécie de menor resistência. A maior resistência ao fungo Gloeophyllum trabeum foi observada para a madeira de Astronium sp., enquanto que a espécie Aspidosperma desmanthum se mostrou como a menos resistente.

scholarly journals Wood physical properties, color, decay resistance and stiffness in Tectona grandis clones with evidence of genetic control

2013 ◽  
Vol 62 (1-6) ◽  
pp. 142-152 ◽  
Author(s):  
R. Moya ◽  
J. D. Marín ◽  
O. Murillo ◽  
L. Leandro
Keyword(s):  
Clonal Selection ◽  
Tectona Grandis ◽  
Wood Properties ◽  
Decay Resistance ◽  
Clonal Variation ◽  
Blue Color ◽  
Limited Information ◽  
Pycnoporus Sanguineus ◽  
Radial Shrinkage ◽  
Improvement Programs

AbstractTectona grandis (teak) plantations are being produced with trees from genetic improvement programs, including clonal selection. However, limited information about inheritance of wood properties is available. For studying genetic parameters of T. grandis wood properties and stem diameter two 10-yr-old trials were studied involving nominally 2 sites × 20 clones × 3 replicates × 1 ramet. Clonal variation was observed in: heartwood (HWP), pith (PP) and bark (BP) percentages; green moisture content (IMC) and density (GD); tangential (TS), radial (RS) and volumetric (VS) shrinkage and ratio tangential/radial: shrinkage (ratio T/R); L*a*b* color parameters; and stiffness and specify gravity (SG). Some wood properties evidenced strong across-sites genotypic control. The higher broad-sense heritability estimates (over 0.36) were for PP, IMC, SG, TS, VS and L*, a*, and b* color coordinates and stiffness. Low and non-significant values were estimated for HWP, BP, GD, RS, ratio T/R and decay resistance of sapwood and heartwood to Trametes versicolor and Pycnoporus sanguineus. However, HWP showed marked clone x site interaction. Phenotypic and tentatively estimated genotypic correlations indicate that selecting faster-growing clones will improve some important wood properties, such as increasing HWP, and decreasing PP and BP, without affecting other wood properties. Selecting clones for denser wood, as expected, improved stiffness, should decrease IMC and affect negatively b* (yellow/blue) color. Clone selection with lower L* values could increase redness (a*) of wood.

scholarly journals Influence of Copper and Biopolymer/Saqez Resin on the Properties of Poplar Wood

Forests ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 667 ◽  
Author(s):  
Huijun Dong ◽  
Mohsen Bahmani ◽  
Sohrab Rahimi ◽  
Miha Humar
Keyword(s):  
Physical Properties ◽  
Trametes Versicolor ◽  
Weight Percent Gain ◽  
Weight Percent ◽  
Decay Resistance ◽  
White Rot ◽  
White Rot Fungus ◽  
Poplar Wood ◽  
Wood Protection ◽  
Increasing Trend

There is an increasing trend in the use of environmentally-friendly materials in wood protection. This includes the use of less toxic active ingredients, as well as better fixation. This study investigates the formulation based on the combination of copper and Saqez resin on the physical and biological resistance properties of poplar wood. Samples were treated by either copper-ethanolamine (Cu/MEA) and/or Saqez resin at various treatment levels. A vacuum pressure procedure was applied. The retention, weight percent gain, water absorption, volumetric swelling, and decay resistance of the samples were then determined. The highest retention and weight percent gain were obtained in the samples treated with the combination of copper-based system and Saqez resin. Additionally, the combination of the copper and Saqez improved the physical properties and decay-resistance against white-rot fungus Trametes versicolor.

scholarly journals Decay resistance of thermally-modified Eucalyptus grandis wood at 140°C, 160°C, 180°C, 200°C and 220°C

2010 ◽  
Vol 101 (23) ◽  
pp. 9391-9394 ◽  
Author(s):  
Fred Willians Calonego ◽  
Elias Taylor Durgante Severo ◽  
Edson Luiz Furtado
Keyword(s):  
Eucalyptus Grandis ◽  
Decay Resistance

scholarly journals Mechanical Properties and Decay Resistance ofcmd="newline"Hornbeam Cement Bonded Particleboards

2008 ◽  
Vol 2008 ◽  
pp. 1-4 ◽  
Author(s):  
Antonios N. Papadopoulos
Keyword(s):  
Mechanical Properties ◽  
Trametes Versicolor ◽  
White Rot Fungi ◽  
Decay Resistance ◽  
White Rot ◽  
Carpinus Betulus ◽  
Cement Ratio ◽  
Coniophora Puteana ◽  
Wood Particles ◽  
Minimum Requirements

Cement bonded particleboards were manufactured from hornbeam (Carpinus betulusL.) wood particles. Hydration tests were carried out to determine the inhibitory index in order to characterise wood-cement compatibility. The results revealed that the mixture of hornbeam-cement can be classified as moderate inhibition. Two wood: cement ratios were applied in this study, namely, 1 : 3 and 1 : 4, for the board manufacture. It was found that an increase of cement-wood ratio resulted in an improvement in all properties examined, except MOR. All properties of the boards made from 1 : 4 wood: cement ratio surpassed the minimum requirements set forth by the building type HZ code. Boards were exposed to brown and white rot fungi,Coniophora puteana, andTrametes versicolor, respectively. Overall, both fungi failed to attack the cement-bonded boards.

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