نتایج جستجو برای: wood product
تعداد نتایج: 317891 فیلتر نتایج به سال:
Abstract Wood science covers in particular the areas of formation and composition as well chemical, biological physical-mechanical properties wood. First comprehensive studies have already been published last century. Detailed knowledge wood is required for processing wood, production wood-based materials, utilization materials buildings various other products such furniture. This review gives ...
Improving manufacturing efficiency and increasing product worth requires the right combination of actions throughout the manufacturing process. Many innovations have been developed over the last several decades to achieve these goals. Innovations typically work their way backwards in the manufacturing process, with an increasing level of monitoring occurring at the end of a production line. The...
will be easier to identify fiber quality research gaps and their linkage to the issue of enhancing forest productivity. Defining Fiber Quality Quality is generally defined as “suitability for a use” (Briggs and Smith 1986). Further precision requires statement of a specific product and the key performance requirements of that product in service. Given these product performance requirements, the...
The different uses of wood result in a hierarchy of carbon and energy impacts that can be characterized by their efficiency in displacing carbon emissions and/or in displacing fossil energy imports, both being current national objectives. When waste wood is used for biofuels (forest or mill residuals and thinnings) fossil fuels and their emissions are reduced without significant land use change...
Alkaline copper quaternary (ACQ) Type D is one of several compounds currently being used as a chemical preservative to treat wood for prevention of rot and decay. As wood weathers naturally, human exposure to ACQ might occur through dermal contact or incidental ingestion of residues from the wood surface. To understand any potential for health risks from the use of ACQtreated wood, a health-bas...
Brown-rot fungi are Basidiomycetes that remove cellulose and other polysaccharides from wood, leaving an amorphous, brown, crumbly residue that is composed largely of lignin, hence the name brown-rot. Decay by brown-rot fungi is by far the most serious type of damage to wood in-service. These fungi cause structural failure before losses in total wood substance are detected. The effect of brown-...
In addition to forest ecosystems, wood products are carbon pools that can be strategically managed to mitigate climate change. Wood product models (WPMs) simulating the carbon balance of wood production, use and end of life can complement forest growth models to evaluate the mitigation potential of the forest sector as a whole. WPMs can be used to compare scenarios of product use and explore mi...
By means of dynamic mechanical thermal analysis (DMTA), selected tropical wood species, namely Eugenia spp., Artocarpus rigidus, Artocarpus elesticus, Koompassia malaccensis, and Xylopia spp. have been characterized. The woods were treated with sodium meta-periodate to convert them into wood polymer composites (WPC). After two weeks the WPC were chemically treated with phenylhydrazine to conver...
Douglas-fir is the most commercially important timber species in the US Pacific Northwest due to its ecological prevalence and its superior wood attributes, especially strength and stiffness properties that make it highly prized for structural applications. Its economic significance has led to extensive establishment and management of plantations over the last few decades. Cultural treatments a...
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