Release of Terpenes from Fir Wood during Its Long-Term Use and in Thermal Treatment

Kačík, František; Veľková, Veronika; Šmíra, Pavel; Nasswettrová, Andrea; Kačíková, Danica; Reinprecht, Ladislav

doi:10.3390/molecules17089990

Cited by 31 publications

(17 citation statements)

References 36 publications

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“…Thermal treatment temperatures are usually in the range of 150 °C to 280 °C (Martinka et al 2014), and significant changes occur when the temperature exceeds 200 °C. Thermal treatment improves wood durability, resistance to biological factors and weathering, hygroscopicity, and dimensional stability (Allegretti et al 2008;Murata et al 2013;Navickas et al 2015), but it significantly reduces its mechanical properties (Weiland and Guyonnet 2003;Borrega and Kärenlampi 2008;Niemz et al 2010;Kačík et al 2012;Kubš et al 2016). Depending on the temperature and thermal treatment conditions, the mechanical properties are reduced by 10% to 30%.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Modulus of Elasticity of Thermally Treated Spruce Wood using the Ultrasound and Resonance Methods

et al. 2016

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The effect of thermal treatment temperatures on the dynamic and static modulus of elasticity (MOE) of Norway spruce wood (Picea abies (L.) H. Karst.) was evaluated. The dynamic MOE was measured using ultrasound and resonance methods in the longitudinal and transverse directions. The static MOE was determined by the three-point bending test. The dynamic MOE values determined by the ultrasound method were higher than the static MOE values in each case. As the temperature of the thermal treatment increased, the difference between the dynamic and static MOE values decreased. The MOE increased with increasing temperature, and it was more pronounced on a tangential surface. Increasing the sensor distance had a positive effect on the correlation between the static and dynamic MOE, and the effect from the increased temperature decreased. Measurement by the resonance method showed twice as high MOE values in the transverse direction than in the longitudinal direction. The thermal treatment caused a significant decrease in the MOE only in the transverse direction, and the differences were insignificant in the longitudinal direction. The dynamic MOE values measured by the resonance method were higher than the static MOE values but slightly lower than the values measured by the ultrasound method.

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Section: Introductionmentioning

confidence: 99%

Measuring the Modulus of Elasticity of Thermally Treated Spruce Wood using the Ultrasound and Resonance Methods

et al. 2016

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“…The method of technological processing, e.g., drying before processing into final products is also important [ 40 , 60 ]. It is worth noticing that thermal treatment speeds up the release of terpenes from wood, and processing at higher temperatures leads to a drop of terpenes’ quantity in a final product [ 61 ]. The wood age impact on VOCs content and emission was described in the study of Ewen [ 30 ].…”

Section: Vocs From Woodmentioning

confidence: 99%

Volatile Organic Compounds (VOCs) from Wood and Wood-Based Panels: Methods for Evaluation, Potential Health Risks, and Mitigation

2020

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Volatile organic compounds (VOCs) are contained in various construction materials and interior equipment. Their higher concentrations in the indoor air are associated with negative effects on human health and are disputed in terms of health risk, since people spend a considerable part of their lifetime indoors. Therefore, the presence of VOCs in indoor air is a case of concern regarding sick building syndrome (SBS). From a historical point of view, wood and wood-based panels represent a widely used material. Nevertheless, wood appears to be nowadays a product and a material of a sustainable future. Depending on wood extractives’ composition and an abundance of diverse wood species, different profiles of volatiles are emitted. In case of wood-based panels, the impact of adhesives and additives that are essentially applied aiming to adjust the panels’ properties is even enriching this cocktail of chemicals. This paper comprises the issue of VOCs emitted from wood and wood-based panels. The most abundant VOCs were summarized. The options of VOCs for analytical determination from these matrixes are described with their benefits and limitations.

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“…The food types were collected from the same area as the termites and were kiln-dried at 60°C for 48 h to determine dry weight. This procedure is commonly used to study the wood preferences of termites (Su & La Fage, 1984a;Grace & Yamamoto, 1994;Morales-Ramos & Rojas, 2001;EN 118, 2013) because this temperature preserves the properties of the wood (Kačík et al, 2012) and also has the benefit of sterilization (http://www.usgr.com/soil-sterilization).…”

Section: Laboratory Workmentioning

confidence: 99%

Suitability of multiple Mediterranean oak species as a food resource forReticulitermes grasseiClément (Isoptera: Rhinotermitidae)

Cárdenas

Gallardo

Toledo

2017

Bull. Entomol. Res.

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The subterranean termite Reticulitermes grassei Clément causes lesions in the trunk of Quercus suber L. by constructing feeding galleries, but no information is available regarding other Quercus species from the Mediterranean region. This work aimed to study the suitability of the other main oak species of Mediterranean forests as a food resource for R. grassei. Two experiments, choice and non-choice feeding, were conducted lasting for 15, 30, and 45 days each. In the non-choice experiment, termites were offered one of the following food types: Quercus suber, Quercus ilex L., Quercus faginea Lam, cork or Pinus pinea L., which was considered the control. The choice feeding experiment used all the same food types listed above, supplied simultaneously in the same container. Food selection was examined by analysing the relationships over time between surviving termites and food consumption. The results indicated that R. grassei could be considered a generalist species, as it consumed the cork and wood of all oak species, as well as displaying a clear preference for soft wood (pine). Correlation analysis indicated that consumption was not dependent on wood density. Survival of R. grassei was influenced by the time of exposure to different oak species, but a high survival rate was maintained over time in the pine treatment (upper 70% in the three experiments). Given these results, it can be concluded that all the oak species are a suitable food source for R. grassei.

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Release of Terpenes from Fir Wood during Its Long-Term Use and in Thermal Treatment

Cited by 31 publications

References 36 publications

Measuring the Modulus of Elasticity of Thermally Treated Spruce Wood using the Ultrasound and Resonance Methods

Measuring the Modulus of Elasticity of Thermally Treated Spruce Wood using the Ultrasound and Resonance Methods

Volatile Organic Compounds (VOCs) from Wood and Wood-Based Panels: Methods for Evaluation, Potential Health Risks, and Mitigation

Suitability of multiple Mediterranean oak species as a food resource forReticulitermes grasseiClément (Isoptera: Rhinotermitidae)

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