Improving the permeability of Douglas-fir (Pseudotsuga menziesii) containing compression wood byPhysisporinus vitreusandXylaria longipes

Emaminasab, Mohammad; Tarmian, Asghar; Pourtahmasi, Kambiz; Avramidis, Stavros

doi:10.1080/20426445.2016.1155788

Cited by 9 publications

(4 citation statements)

References 27 publications

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“…To better understand this case, extensive wood chemistry analyses are needed for the type and amount of wood chemical components degraded after P. vitreus fungal activity. Although many studies have been conducted on the effects of P. vitreus fungus on the permeability, physical, mechanical, and anatomical properties of wood (Lehringer et al 2010;Lehringer 2011;Lehringer et al 2011;Fuhr et al 2012;Gilani et al 2014;Emaminasab et al 2016;Bakir et al 2021;Tajrishi et al 2021;Bakir et al 2022aBakir et al ,b, 2022a, studies on wood chemical components seem to be limited.…”

Section: Effects Of Biological Incision Pretreatment On Wood Anatomymentioning

confidence: 99%

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Bakır

2023

BioRes

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The anatomical structure of wood and the application of three different incision pretreatments affect the distribution of preservatives in refractory woods. This study focused on Picea orientalis (L.) Peterm.) and Larix decidua Mill. and investigated the distribution of copper-based preservatives in the wood microstructure. Different incision pretreatments were applied before impregnation to increase the permeability of spruce and larch sapwood samples. After the incision pretreatments, transverse cross-sectional surfaces of the samples were sealed with polyurethane-based paint to prevent excessive preservative uptake into open ends of longitudinal tracheid lumens. The samples were then impregnated with Celcure C4, by applying a vacuum method. The structure of wood samples with preservatives before and after the incision pretreatments were observed. Copper microdistribution was observed to increase significantly in refractory wood species after different incision pretreatments, especially in larch wood. The degradation of pits caused by biological incision effectively increased the microdistribution of copper. The difference in the microdistribution of increased copper with the laser and mechanical incision pretreatments – following the same incision model – was attributed to the different anatomical structure and density of spruce and larch wood species and the fact that the hole depth and geometry were different in the laser and mechanical incision processes.

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Section: Effects Of Biological Incision Pretreatment On Wood Anatomymentioning

confidence: 99%

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Bakır

2023

BioRes

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“…The improvement was more remarkable when the specimens were exposed to B. subtilis UTB22 (485 % for tangential permeability and 676 % for longitudinal permeability). Several studies have also shown that different isolates of P. vitreus can significantly improve wood permeability, even after a short period of colonization (Schwarze and Landmesser, 2000;Schwarze et al, 2006;Lehringer et al, 2010;Fuhr et al, 2011;Emaminasab et al, 2015Emaminasab et al, , 2016; however, the changes in permeability vary with the wood species, the fungal isolate, and incubation conditions (Schwarze et al, 2006). The improvement in permeability is mostly attributable to the degradation of the pit membranes (Schwarze et al, 2006;Schwarze and Schubert, 2011;Fuhr et al, 2011).…”

Section: Air Permeability and Micro-scale Treatability 33 Propusnost Zraka I Impregnacija Na Mikrorazinimentioning

confidence: 99%

“…Norway spruce (Picea abies), without any considerable reduction in the mechanical strength of the wood (Schmidt et al, 1997 Emaminasab et al, 2015Emaminasab et al, , 2016 with macro-scale analyses. The current study gives some detailed information on the micro-scale treatability of bioincised wood which could be helpful in achieving an in-depth understanding of the treatability-enhancing mechanisms.…”

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confidence: 99%

Biodegradation and Micro- Scale Treatability Pattern of Loblolly Pine Heartwood Bioincised by Bacillus Subtilis and Physisporinus Vitreus

et al. 2021

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One strategy for improving the treatability of refractory wood species is biological incising, and its efficiency depends on how the microorganisms modify the porous structure of the wood. Evaluation of the bioincised wood treatability on a micro-scale can thus help to better understand the treatability enhancing mechanisms. In the present study, the biodegradation pattern and micro-scale treatability of Loblolly pine (Pinus taeda L.) heartwood were determined after bioincising with the white-rot fungus Physisporinus vitreus (Pers.: Fr.) P. Karsten isolate 136 and bacterium Bacillus subtilis UTB22. Oven-dried specimens with dimensions of 50 mm × 25 mm × 15 mm (L × T × R) were incubated with the microorganisms at (23±2) °C and (65±5) % relative humidity for six weeks. The control and exposed wood blocks were then pressure treated by 1 % fluorescent dye (fluorescein)-containing water to study the treatability pattern under a fluorescence microscope. The longitudinal and tangential air permeability and compression strength parallel to the grain of the specimens were also determined at the end of the incubation period. Scanning electron microscopic (SEM) studies showed that degradation by B. subtilis UTB22 was limited to the pit membranes, but the cell walls were also degraded to some extent by P. vitreus. The fungus caused a higher mass loss compared to the bacterium, whereas the permeability enhancing ability of the bacterium was more pronounced. The fluorescent dye tracer also showed that higher treatability with more uniformity was obtained by B. subtilis UTB22. The improvement in treatability by both microorganisms was mainly due to the degradation of the earlywood tracheids.

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“…In the forest products industry, the impact of controlled decay by wood rot fungi has been studied for years. It is one of the biotechnological applications used to increase the permeability of wood, because it does not have excessively harmful effects on other wood properties, especially on the mechanical strength (Fuhr et al 2012a, b;Fuhr et al 2013;Schubert et al 2013;Gilani et al 2014;Schubert et al 2014;Gilani and Schwarze 2015;Emaminasab et al 2016;Dale et al 2019;Chang et al 2020;Bakir et al 2021a,b;Tajrishi et al 2021;Bakir et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Effects of different incising pretreatments in improving permeability in two refractory wood species

Bakır

2022

BioRes

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For many product and applications, the penetration of preservatives or modification substances into wood species should be deep and homogeneous. Caucasian spruce and European larch are resistant to impregnation. This study compared how different incising pre-processes increased the retention of impregnation materials and the depth of their penetration into the structures of these refractory wood species. Mechanical, biological, and laser incising pretreatments were applied to increase the permeability of sapwood samples before the impregnation. To compare the uptake of the wood preservatives transverse and longitudinal to the axial tracheids in the samples, the cross-sections of some of the samples that had been subjected to different incising pretreatments were covered with a polyurethane-based paint. All wood samples were impregnated using a vacuum method with Celcure C4 new generation preservatives. The study compared the possible effects of these different incising pretreatments on the uptake of preservatives into the tracheids in the spruce and larch woods in both longitudinal and transverse directions. The results showed that the copper (Cu) uptake levels increased in these refractory wood species, especially in the transverse direction, after the different incising pretreatments. Moreover, the results showed it is very important to choose the most suitable pretreatment method for the refractory tree species before impregnation.

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Improving the permeability of Douglas-fir (Pseudotsuga menziesii) containing compression wood byPhysisporinus vitreusandXylaria longipes

Cited by 9 publications

References 27 publications

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Anatomical structure and copper microdistribution in mechanical, biological, and laser incised spruce and larch refractory woods

Biodegradation and Micro- Scale Treatability Pattern of Loblolly Pine Heartwood Bioincised by Bacillus Subtilis and Physisporinus Vitreus

Effects of different incising pretreatments in improving permeability in two refractory wood species

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