Review on Lipophilic and Hydrophilic Extractives in Tissues of Common Beech

Vek, Viljem; Oven, Primož; Poljanšek, Ida

doi:10.5552/drind.2016.1511

Cited by 9 publications

(11 citation statements)

References 52 publications

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“…Although the amount of extractive content is low in hornbeam and beech (Rowe & Conner, 1979;Vek, Oven, & Poljanšek, 2016), the reason for low abundance of decay fungi on hornbeam timber was an artefact due to absence of the species in the entire several log depots examined. Beech wood, in contrast, was present in all the storage depots examined (Reinprecht, 2016).…”

Section: Discussionmentioning

confidence: 99%

Identification of wood‐decay fungi and assessment of damage in log depots of Western Black Sea Region (Turkey)

2019

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The aim of this study was to determine and quantify the wood‐decay fungi found on logs of forest tree species (beech, oak, hornbeam, Scots pine and fir) stored in log depots located in six different provinces in the Western Black Sea Region of Turkey. Additionally, it was aimed to determine the natural durability of some important wood species against the most commonly detected wood‐decay fungi. Eighteen families, 31 genera and 45 species belonging to the division Basidiomycota were detected; Antrodia crassa was identified for the first time in Turkey. The abundance of Panus neostrigosus, Polyporus meridionalis, Trametes hirsuta, T. versicolor and Stereum hirsutumincreased significantly with the holding time of the logs (r = 0.99, 0.87, 0.53, 0.57 and 0.78, respectively, p < 0.05). The majority of the fungal species were detected on logs stored in depots for 4–6 years (66%). The percentage of fungal species found on the logs with a holding time of three years or less was 29%, whereas the percentage for those detected on logs stored for seven or more years was 31%. Among the wood species, the greatest number of fungal species (29) and highest amount of fungi (2,539) occurred on beech wood. Natural durability tests showed that T. versicolor caused the greatest loss of wood mass, with an average of 23%. Field studies and natural durability tests performed in the laboratory showed that beech wood lost the most mass among the timber species studied.

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Section: Discussionmentioning

confidence: 99%

Identification of wood‐decay fungi and assessment of damage in log depots of Western Black Sea Region (Turkey)

2019

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“…In some tree species, the sapwood gradually transforms-with loss of moisture-into a light-colored wood (occasionally called ripewood), which does not contain living cells or reserve material, with low amounts of extractives. A typical example here is common beech, which has extractive contents being among the lowest known and primarily represented by various mono and oligosaccharides, sugar alcohols and acids, and simple phenols (Vek et al 2016). By contrast, the most prevalent extractives in the heartwood of Scots pine are the hydrophobic stilbenes pinosylvin and pinosylvin monomethylether, monoterpenoids, and resin acids (Ekeberg et al 2006).…”

Section: Surface Lightness Changes and Moisteningmentioning

confidence: 99%

Color Changes of Various Wood Species in Response to Moisture

Baar¹,

Paschová²,

Čermák³

et al. 2019

WFS

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Color including texture and gloss is one of the most important esthetical attributes of wood. For any porous materials in contact with water, the phenomenon of surface darkening arises from a change in the refractive index, as water enters air-filled pores. For the first time, this research investigated to what extent MC differences affect the surface color, below fiber saturation and after the pores are filled with water, with respect to extractive contents. Samples from 13 wood species were exposed to various climates, and as soon as EMC was reached, the color was determined. Color changes were also recorded after water submersion and also after vacuum impregnation in water. Chromaticity parameters a* and b* widely increased, along with higher moisture contents. Lightness changes were mostly stable at lower moisture contents. An exception was demonstrated by the heartwood species black locust, plum, walnut, and oak, which showed a brightening effect at lower moisture contents, followed by the darkening phase. The overall darkening of wood at high RH is connected to capillary condensation. Liquid water present in the cell lumen most caused darkening and an intensification of hue (increase in a* and b*). Darkening was even more expressed after vacuum impregnation with water. In conclusion, with only limited fluctuations in moisture contents below fiber saturation, the expected color changes are minor to neglectable.

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“…Beech smoking chips of BROWIN Company, Poland, consisting of cellulose (41 wt%), hemicellulose (33 wt%), lignin (22% wt%), and other substances (4 wt%) [13]; • Sugar beet pulp originating from sugar beet processes as the by-products used in the form of a briquette which comprises carbohydrates (75 wt%) and nitrogen (9 wt%) [14]; and • Polyurethane foam-block samples at sizes 1 cm 3 × 1 cm 3 × 1 cm 3 of polyether polyol foam (EUROFOAM Company). The polyurethane foam was free of nutrients.…”

Section: Immobilization Matricesmentioning

confidence: 99%

Batch Mode Reactor for 3,5-Dinitrosalicylic Acid Degradation by Phanerochaete chrysosporium

et al. 2021

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A new batch mode reactor was constructed to conduct continuous biodegradation of 3,5-dinitrosalicylic acid. Various types of matrices with immobilized Phanerochaete chrysosporium were immersed in a solution containing pollutant and mineral nutrients. Three parameters were chosen to optimize the process. The nitrate and nitrite ions concentrations and HPLC analysis were used to prove the biodegradation of 3,5-dinitrosalicylic acid, and the mixed effects model using one-factor ANOVA was used for statistical calculations. The results showed the correlation between the initial pH, a medium composition, and the process time. In pH = 6.5, the degradation effectiveness was estimated at 99% decrease in the substrate within 14 days, while an 80% decrease of acid concentration was indicated in pH = 3.5 after 28 days of the process duration.

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Review on Lipophilic and Hydrophilic Extractives in Tissues of Common Beech

Abstract: • Common beech (Fagus sylvatica L.) is one of the most widespread and economically important tree species in Europe and, therefore, represents

Cited by 9 publications

References 52 publications

Identification of wood‐decay fungi and assessment of damage in log depots of Western Black Sea Region (Turkey)

Identification of wood‐decay fungi and assessment of damage in log depots of Western Black Sea Region (Turkey)

Color Changes of Various Wood Species in Response to Moisture

Batch Mode Reactor for 3,5-Dinitrosalicylic Acid Degradation by Phanerochaete chrysosporium

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