Permeability changes in heartwood of Picea abies and Abies alba induced by incubation with Physisporinus vitreus

Schwarze, Francis W. M. R.; Landmesser, Helge; Zgraggen, Bruno; Heeb, Markus

doi:10.1515/hf.2006.071

Cited by 54 publications

(68 citation statements)

References 10 publications

(10 reference statements)

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“…The purpose of this exposure was to determine whether incipient decay increases or decreases the wetting ability of wood. If the wetting ability is increased, incipient wood decay could result in an even higher moisture content (Schwarze et al 2006), leading to rapid overall degradation. In spite of the short exposure time, there was a fairly high mass loss, especially after exposure to the brown rot fungus G. trabeum.…”

Section: Mass Changementioning

confidence: 99%

Influence of Artificial and Natural Weathering on the Hydrophobicity and Surface Properties of Wood

Žlahtič¹,

Humar²

2016

BioResources

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The use of wood in outdoor, above-ground applications is increasing in Europe. To further increase wood usage, more information related to service life and maintenance costs must be provided. Water exclusion efficacy (WEE) is one of the most important factors influencing service life and strongly correlates to wood moisture dynamics, surface properties, and hydrophobicity (WEE as a whole). WEE can be improved with modifications and hydrophobic treatments. The aim of this study was to elucidate which wood surface properties affect WEE and to note changes over time caused by artificial or natural aging. Wood samples of oak (Quercus), sweet chestnut (Castanea sativa), European larch (Larix decidua), Scots pine heartwood and sapwood (Pinus sylvestris), Norway spruce (Picea abies), and beech (Fagus sylvatica) were used to investigate this phenomenon. The moisture performance of the wood samples was improved with thermal modification, wax, oil, and biocide treatment. In total, 17 materials were prepared. After treatment, four different aging procedures were applied. Before and after aging, Fourier transform infrared spectra, colour, and contact angle were determined. The analysis of untreated wood based materials indicated that durability and hydrophobicity are related. Of all the treatments, wax performed the best and retained high hydrophobicity even after the most severe aging method (outdoor exposure).

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Section: Mass Changementioning

confidence: 99%

Influence of Artificial and Natural Weathering on the Hydrophobicity and Surface Properties of Wood

Žlahtič¹,

Humar²

2016

BioResources

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“…Our studies show that isolates of P. vitreus have an extraordinary capacity to induce substantial permeability changes in heartwood of P. abies without causing significant loss of impact bending strength (Schwarze and Landmesser 2000;Schwarze et al 2006;Schwarze 2007;Lehringer et al 2009). Even after 6 weeks incubation, when the mass loss induced by P. vitreus was slight (>1%), wood permeability increased to approximately 300-400 kg m −3 in Norway spruce and 400-680 kg m −3 in silver fir (Schwarze et al 2006).…”

Section: Sciencementioning

confidence: 73%

“…"Bioincising" is a biotechnological process that has been developed to improve the permeability of refractory wood species by incubation under controlled conditions for short periods with a white rot fungus, Physisporinus vitreus. Our studies show that isolates of P. vitreus have an extraordinary capacity to induce substantial permeability changes in the heartwood of P. abies without causing significant loss of impact bending strength (Schwarze and Landmesser 2000;Schwarze et al 2006Schwarze et al , 2007Lehringer et al 2009). In fact, wood durability of P. abies and A. alba is enhanced by the bioincising process, which is a promising technology for efficiently distributing wood modification substances, promoting desired improvements in wood properties, as well as leaving the wood surface aesthetically pleasing and the mechanical wood properties unaltered .…”

Section: Introductionmentioning

confidence: 79%

“…In crosswise piled water-saturated pine wood, the fungus decomposes only those parts of the substrate not surrounded by air (Schmidt et al 1996(Schmidt et al , 1997. Some isolates of this fungus have an extraordinary capacity to induce significant permeability changes in the heartwood of Norway spruce and silver fir after hydrolysis of bordered pit membranes without causing significant loss of wood strength (Schwarze et al 2006). The effects of treating conifer wood with commercial pectinases or bacteria to improve penetration of preservatives have been studied in detail (Nicholas and Thomas 1968;Bauch et al 1970;Johnson 1979;Sharma and Kumar 1979;Mai et al 2004).…”

Section: Sciencementioning

confidence: 99%

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Physisporinus vitreus: a versatile white rot fungus for engineering value-added wood products

Schwarze

Schubert

2011

Appl Microbiol Biotechnol

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The credo of every scientist working in the field of applied science is to transfer knowledge "from science to market," a process that combines (1) science (fundamental discoveries and basic research) with (2) technology development (performance assessment and optimization) and (3) technology transfer (industrial application). Over the past 7 years, we have intensively investigated the potential of the white rot fungus, Physisporinus vitreus, for engineering value-added wood products. Because of its exceptional wood degradation pattern, i.e., selective lignification without significant wood strength losses and a preferential degradation of bordered pit membranes, it is possible to use this fungus under controlled conditions to improve the acoustic properties of tonewood (i.e., "mycowood") as well as to enhance the uptake of preservatives and wood modification substances in refractory wood species (e.g., Norway spruce), a process known as "bioincising." This minireview summarizes the research that we have performed with P. vitreus and critically discusses the challenges encountered during the development of two distinct processes for engineering value-added wood products. Finally, we peep into the future potential of the bioincising and mycowood processes for additional applications in the forest and wood industry.

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“…A treatment with P. vitreus enhances the uptake of preservatives and other modification substances in refractory wood species ("bioincising") (Schwarze and Landmesser 2000;Lehringer et al 2011a,b;Schwarze and Schubert 2011;Schwarze et al 2006). A fungal growth model was developed for P. vitreus for an optimized engineering strategy (Fuhr et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Imaging hyphal growth of Physisporinus vitreus in Norway spruce wood by means of confocal laser scanning microscopy (CLSM)

Schubert

Stührk²,

Fuhr³

et al. 2014

Holzforschung

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Light microscopy and electron microscopy are the most common methods for analyzing wood-decay fungi. However, the 3D visualization and quantification of the filamentous structure of fungi in wood is difficult to realize by means of these traditional techniques. In the present work, confocal laser scanning microscopy (CLSM) was further developed for the quantitative imaging of the 3D microscopic hyphal growth of Physisporinus vitreus, a versatile fungus for engineering value-added wood products. To this purpose, the fungus was stained with a fluorescent dye Alexa Fluor. The 3D information obtained by CLSM has a high potential as a basis for the development of mathematical models for a more precise observation of the growth behavior of wood-decay fungi.

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Permeability changes in heartwood of Picea abies and Abies alba induced by incubation with Physisporinus vitreus

Cited by 54 publications

References 10 publications

Influence of Artificial and Natural Weathering on the Hydrophobicity and Surface Properties of Wood

Influence of Artificial and Natural Weathering on the Hydrophobicity and Surface Properties of Wood

Physisporinus vitreus: a versatile white rot fungus for engineering value-added wood products

Imaging hyphal growth of Physisporinus vitreus in Norway spruce wood by means of confocal laser scanning microscopy (CLSM)

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