Analysis of Photodegradation Process of Pinus sylvestris L. Wood after Treatment with Acid and Alkaline Buffers and Light Irradiation

Zborowska, Magdalena; Stachowiak-Wencek, A; Nowaczyk-Organista, M.; Waliszewska, Bogusława; Pradzynski, W

doi:10.15376/biores.10.2.2057-2066

Cited by 16 publications

(7 citation statements)

References 11 publications

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“…Using the percentages of the wood ingredients holocellulose and lignin, their ratio (H/L) can be calculated. The H/L ratio is a valuable measurement to analyze the state of preservation [3,56,57]. This ratio was calculated from the available data.…”

Section: Samplesmentioning

confidence: 99%

Imaging and Assessment of the Microstructure of Conserved Archaeological Pine

Stelzner¹,

Stelzner²,

Gwerder

et al. 2023

Forests

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Impressive wooden objects from past cultures can last for centuries or millennia in waterlogged soil. The aim of conservation is to bring the more or less degraded waterlogged archaeological wooden (WAW) finds to a stable state without altering the wood structure through shrinkage, collapse, and deformation. In this study, the most used methods in the conservation practice, such as the alcohol-ether resin method, conservation with the melamine formaldehyde resin Kauramin 800, a mixture of lactitol and trehalose, saccharose, silicone oil, and three different conservation methods with polyethylene glycol followed by freeze-drying were tested. The effects of the conservation agents on the structure of archaeological pine were investigated using optical light microscopy (reflected light microscopy, RLM), scanning electron microscopy (SEM), and X-ray computed tomography (XCT). Through the examinations, most conservation agents could be identified in the structure and their impact on conservation could be analyzed. In particular, it was possible to trace the incorporation of the conservation agents in the lumen, which was influenced by factors, such as wood anatomy, degree of degradation, and drying process. Differences in the mode of action of the conservation processes could also be identified in the composition of the cell wall tracheids.

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Section: Samplesmentioning

confidence: 99%

Imaging and Assessment of the Microstructure of Conserved Archaeological Pine

Stelzner¹,

Stelzner²,

Gwerder

et al. 2023

Forests

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“…7.6 Colour changes in wood exposed to solar UV radiation correlate well with the extent of lignin photodegradation UV-induced degradation of the lignin in wood exposed to solar radiation results in yellowing. 370 The surface yellowness index and the extent of lignin degradation (measured spectroscopically) during solar UV-induced degradation in several hardwood species were found to be correlated. [371][372][373] Since colour measurements are more convenient, they could be used as a good surrogate for detecting changes in the surface chemistry of weathered wood.…”

Section: In Cable-jackets With the New Aluminum-based Fire Retardants...mentioning

confidence: 99%

Environmental effects of ozone depletion and its interactions with climate change: progress report, 2015

2016

Photochem Photobiol Sci

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The Environmental Effects Assessment Panel (EEAP) is one of three Panels that regularly informs the Parties (countries) to the Montreal Protocol on the effects of ozone depletion and the consequences of climate change interactions with respect to human health, animals, plants, biogeochemistry, air quality, and materials. The Panels provide a detailed assessment report every four years. The most recent 2014 Quadrennial Assessment by the EEAP was published as a special issue of seven papers in 2015 (Photochem. Photobiol. Sci., 2015, 14, 1-184). The next Quadrennial Assessment will be published in 2018/2019. In the interim, the EEAP generally produces an annual update or progress report of the relevant scientific findings. The present progress report for 2015 assesses some of the highlights and new insights with regard to the interactive nature of the effects of UV radiation, atmospheric processes, and climate change.

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“…Today, the ancient village is entirely reconstructed and is an open-air museum, and the archeological wood is kept underground. In order to replicate some of the main causes of wood degradation found at the site (Babiński et al, 2006; Zborowska et al, 2006; Waliszewska et al, 2007; Tamburini et al, 2015), pine ( Pinus sylvestris ) and oak ( Quercus sp.) wood samples were put into lake water and peat and then removed from the burial environment after 4, 6, 8 and 10 years.…”

Section: Introductionmentioning

confidence: 99%

Distinguishing the Signs of Fungal and Burial-Induced Degradation in Waterlogged Wood from Biskupin (Poland) by Scanning Electron Microscopy

et al. 2018

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A scanning electron microscopy (SEM) investigation of pine (Pinus sylvestris) and oak (Quercus sp.) wood samples exposed to various types of natural degradation is presented with the aim of discussing the correct identification of multiple degradation signs in waterlogged wood. This is part of an experiment performed at the archeological site of Biskupin (Poland) to evaluate the dynamics of short-term wood degradation during reburial and the suitability of excavated wood as substrate for the fungal attack. The final aim is to support and inform the in situ conservation strategy currently applied to archeological woods. To replicate the burial conditions, wood samples were put into lake water and peat. The samples were removed from the burial environments after 4, 6, 8, and 10 years, and then exposed to laboratory-controlled attack by a brown rot fungus Coniophora puteana and a white rot fungus Coriolus versicolor. SEM images were acquired for all samples before and after the fungal attack. The results showed a slight degradation occurred in the burial environments (soft rot and bacteria). In addition, both typical and previously neglected features of fungal attack were observed, highlighting that the extent of the fungal decay varies according to the previous degree of wood degradation. Some comparisons are provided with archeological wood samples from the Biskupin site.

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Analysis of Photodegradation Process of Pinus sylvestris L. Wood after Treatment with Acid and Alkaline Buffers and Light Irradiation

Cited by 16 publications

References 11 publications

Imaging and Assessment of the Microstructure of Conserved Archaeological Pine

Imaging and Assessment of the Microstructure of Conserved Archaeological Pine

Environmental effects of ozone depletion and its interactions with climate change: progress report, 2015

Distinguishing the Signs of Fungal and Burial-Induced Degradation in Waterlogged Wood from Biskupin (Poland) by Scanning Electron Microscopy

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