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Fir wood was modified using epoxy soybean oil, diethylene glycol, and maleic anhydride as raw materials to enhance its mechanical properties, thermal stability, and water resistance. Diethylene glycol first opens the epoxy ring of the soybean oil and then reacts with maleic anhydride to produce an esterification reaction. The product modifies the fir wood through a chemical impregnation method. A systematic evaluation of the modified wood's weight gain ratio, density, mechanical properties, thermal stability, water resistance, and microstructural changes was conducted. The results show that the compressive strength increased from 38.1 to 94.9 MPa, the water absorption rate decreased from 158.03 to 6.93%, and the thermal stability was also enhanced. This study provides a simple, low-cost, and green method for improving the comprehensive performance of fast-growing fir wood, offering new insights for achieving sustainable development and green chemical engineering.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11223232 | PMC |
http://dx.doi.org/10.1021/acsomega.4c02820 | DOI Listing |
Tree Physiol
August 2025
State Key Laboratory of Agricultural and Forestry Biosecurity, College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Pine wilt disease (PWD), caused by the pine wood nematode (PWN), is a devastating systemic disease with significantly impacts on pine species, particularly Masson pine (Pinus massoniana) in South China. This study integrated transcriptomic and metabolomic analyses to identify differentially expressed genes (DEGs) and differentially accumulated metabolites (DAMs) associated with PWN resistance. By comparing the gene expression and metabolic profiles of healthy, mechanically wounded, and PWN-infected Masson pine trees at 28 d post-inoculation, we identified 1,310 DEGs were specifically associated with PWN infection after excluding mechanical damage effects.
View Article and Find Full Text PDFSensors (Basel)
August 2025
Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00184 Rome, Italy.
This study presents a wireless, non-invasive sensing system for monitoring the dielectric permittivity of materials, with a particular focus on applications in cultural heritage conservation. The system integrates a passive split-ring resonator tag, electromagnetically coupled to a compact antipodal Vivaldi antenna, operating in the reactive near-field region. Both numerical simulations and experimental measurements demonstrate that shifts in the antenna's reflection coefficient resonance frequency correlate with variations in the dielectric permittivity of the material under test.
View Article and Find Full Text PDFSci Rep
August 2025
Department of Ecology and Silviculture, Faculty of Forestry, University of Agriculture in Krakow, 29 Listopada 46 Str., 31-425, Kraków, Poland.
The decomposition of deadwood is a key process in the biogeochemical cycle of forests, affecting water retention, soil structure and biodiversity. The aim of this study is to understand how the rate of deadwood decomposition changes depending on the location in the altitude gradient in mountain forest ecosystems. Additionally, the study investigates how the physical properties of wood vary with elevation.
View Article and Find Full Text PDFFront Plant Sci
July 2025
Laboratoire sur les écosystèmes terrestres boréaux, Département des Sciences Fondamentales, Université du Québec à Chicoutimi, Chicoutimi, QC, Canada.
Understanding the effects of climate variability on tree growth is crucial to predict forest carbon sequestration under global climate change. This study investigates the dynamics of wood formation in balsam fir in response to historical climatic data and projected variations. Weekly microcores were collected from 33 permanent plots in a boreal forest in Québec, Canada, over five growing seasons from 2018 to 2022.
View Article and Find Full Text PDFSci Rep
July 2025
Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China, Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning, China.
Cunninghamia lanceolata, a coniferous timber species solely endemic to China, possesses a natural variant known as Red-heart Chinese fir. This variant is renowned for the distinctive color of its heartwood, where the chestnut-brown xylem significantly enhances the economic value of Cunninghamia lanceolata. To uncover the mechanism of heartwood formation for Red-heart Chinese fir, we conducted a combined analysis of the metabolome and transcriptome during the radial alteration of mature Red-heart Chinese fir xylem.
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