Fungal and bacterial colonies growing on weathered wood surfaces

Buchner, Julia; Irle, Mark; Belloncle, Christophe; Michaud, Franck; Macchioni, Nicola

doi:10.1080/17480272.2018.1443975

Cited by 9 publications

(11 citation statements)

References 21 publications

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“…The specified results point to a strong effect of mould on the overall aesthetic and functional deterioration of coatings and colour changes in coated wood during long-term outdoor exposure [11,36,42,57]. They also suggest that the required testing standards for coating resistance to mould growth [58][59][60] should take into account changes in mould resistance of coating films due to weathering.…”

Section: Coatingmentioning

confidence: 95%

“…This observation has two possible explanations: 1) Fungicides in coatings, mainly IPBC, are susceptible to leaching [56], and 2) in coatings where there was a more significant degradation of the film due to previous artificial weathering ( Figures 6 and 7), the decrease in mould resistance was very pronounced after 4 days of exposure (e.g., AL-1; SL-1; OL-2; OL-8; OL-12). The specified results point to a strong effect of mould on the overall aesthetic and functional deterioration of coatings and colour changes in coated wood during long-term outdoor exposure [11,36,42,57]. They also suggest that the required testing standards for coating resistance to mould growth [58][59][60] should take into account changes in mould resistance of coating films due to weathering.…”

Section: Coatingmentioning

confidence: 95%

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Durability of Selected Transparent and Semi-Transparent Coatings on Siberian and European Larch during Artificial Weathering

et al. 2019

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This paper compares the resistance of 20 commercial transparent and semi-transparent coatings applied to European and Siberian larch during artificial weathering in Xenotest. The change in gloss, colour, contact angle of wetting, resistance to Aspergillus niger and Penicillium brevicompactum moulds was evaluated, and visual changes at the top surface of treated wood species were measured. Overall, the durability of coatings on European larch was higher than that on Siberian larch. The most durable of the tested coatings was a thin-film, i.e., semi-transparent oil-based film containing TiO2 pigment and propiconazole fungicide. Of the transparent coatings, the most stable was a thick acrylic coating. Conversely, penetrating transparent oil systems had low colour stability and overall lifespan. Artificial weathering of all of the coatings resulted in a marked decrease in their resistance to moulds.

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Section: Coatingmentioning

confidence: 95%

Section: Coatingmentioning

confidence: 95%

Durability of Selected Transparent and Semi-Transparent Coatings on Siberian and European Larch during Artificial Weathering

et al. 2019

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“…Wood is an organic material which undergoes changes in its structure and properties along the time under different use and weathering conditions [63]. It is anticipated that rough and cracked wood surface can entrap bacteria which may help in survival of these organisms ultimately posing a risk to contact persons [23] [64].…”

Section: Hygienic Suitability Of Aged Wood Surfacementioning

confidence: 99%

Antimicrobial Characteristics of Untreated Wood: Towards a Hygienic Environment

Munir¹,

Pailhoriès²,

Eveillard³

et al. 2019

Health

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Wood, as a contact surface, has been used for centuries but is usually questioned because of its porosity and organic composition. It has natural antimicrobial properties and, hygienically, can stand the comparison with other materials such as plastic, glass and steel. In this review, we focused on potential microbe-inhibiting properties of wooden surfaces being used in hygienically important places like health institutes and food industries. This article addresses the questionable properties of untreated wood like hygroscopicity, porosity, roughness and chemical composition, and their relation to the hygienic and antimicrobial nature of this material. The other factors linked to the hygienic properties of wood, such as age, species and type of wood, have also been discussed. Our analysis of literature will create better understanding for acceptance of wood as a safety renewable resource. It also provides an outline for future research considering wood material in critical healthcare or food industries.

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“…The antimicrobial activities of non-sterilized and gamma sterilized samples were similar as previously described [ 3 ]. It shows that even if the non-sterilized samples are contaminated with other microbes [ 18 ], this method is not influenced by their presence, especially, when used for screening [ 3 ]. Otherwise, in a natural environment, many microbial interactions occur on wooden surfaces, which could be antagonistic or symbiotic, and can interplay with the antimicrobial activity of wood against specific microbes.…”

Section: Discussionmentioning

confidence: 99%

“…The third factor is the condition of wood which, in terms of aging, erosion, tearing, and weathering, can influence the physical structure and chemical composition and, likewise, the antimicrobial potential of this material. The condition of wood can be affected by cleaning and sterilization methods [ 17 ], such as when food preparation boards are sterilized using hot water washing and ultraviolet rays [ 9 , 11 ], even gamma radiations at a dose of 25–50 kGy are used to sterilize the wooden samples in experimental studies [ 3 , 18 ]. The final factor to consider is the cutting of wood using high energy laser beams, which burn the material on contact areas.…”

Section: Introductionmentioning

confidence: 99%

Experimental Parameters Influence the Observed Antimicrobial Response of Oak Wood (Quercus petraea)

et al. 2020

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The present investigation aimed to utilize a direct wood disc diffusion method to study the influence of plane of cutting, cutting method, sterilization method, and origin of tree on the antimicrobial activity of wood material. Six oak wood trees (Quercus petraea) were collected from 3 different locations in France. They were cut into 4 mm thick slices with either transverse (RT), tangential (LT) or radial (LR) faces. Round discs (diameter 9.95 ± 0.1 mm) were cut from the slices via a laser machine or a manual punch machine, and were sterilized with gamma irradiation (25 kGy) or autoclaving (121 °C). The antimicrobial activity of wood was tested using a direct diffusion method against Staphylococcus aureus and Acinetobacter baumannii isolates. The zone of inhibition around the wooden disc was recorded following the recommendations used for antibiotics tests. The results showed that S. aureus was more susceptible than A. baumannii, to the chemicals that diffused from the wood. The transverse face discs exhibited higher antimicrobial activity. Samples that had been sterilized by autoclaving showed significantly (p < 0.05) lower antimicrobial activity, whereas the cutting method and origin of tree did not influence the antimicrobial activity of wood material. Therefore, the choice of sterilization method and cutting planes must be taken into account while studying and interpreting the antibacterial properties of wood material.

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Fungal and bacterial colonies growing on weathered wood surfaces

Cited by 9 publications

References 21 publications

Durability of Selected Transparent and Semi-Transparent Coatings on Siberian and European Larch during Artificial Weathering

Durability of Selected Transparent and Semi-Transparent Coatings on Siberian and European Larch during Artificial Weathering

Antimicrobial Characteristics of Untreated Wood: Towards a Hygienic Environment

Experimental Parameters Influence the Observed Antimicrobial Response of Oak Wood (Quercus petraea)

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