نتایج جستجو برای: wood forest products
تعداد نتایج: 426655 فیلتر نتایج به سال:
Research on wood-flour-filled polypropylene has primarily focused on one species of wood flour and one or two broad particle-size distributions. To fully exploit the use of wood flour as a filler, the effects of species and particle size need to be examined. This study focused on the effects of both of these variables on the properties of polypropylene filled with wood flour. To examine the eff...
Near-infrared (NIR) spectroscopy provides a rapid, non-destructive method for the routine estimation of wood properties. NIR spectroscopy is increasingly being used to replace traditional methods of wood property assessment, and it provides a wealth of information to tree growers, tree breeders, and manufacturers of forest products. The technology is particularly well-suited to tree improvement...
BACKGROUND No consensus has been reached how to measure the effectiveness of climate change mitigation in the land-use sector and how to prioritize land use accordingly. We used the long-term cumulative and average sectorial C stocks in biomass, soil and products, C stock changes, the substitution of fossil energy and of energy-intensive products, and net present value (NPV) as evaluation crite...
To satisfy the increasing demand for forest products, much of the future timber supply will be from improved trees grown on managed plantations. This fast-grown resource will tend to be harvested in short age rotations and will contain higher proportions of juvenile wood than that of current harvests. In anticipation of this resource, definitive information is needed on the influence of juvenil...
The path and magnitude of future anthropogenic emissions of carbon dioxide will likely influence changes in climate that may impact the global forest sector. These responses in the global forest sector may have implications for international efforts to stabilize the atmospheric concentration of carbon dioxide. This study takes a step toward including the role of global forest sector in integrat...
BACKGROUND Although significant amounts of carbon may be stored in harvested wood products, the extraction of that carbon from the forest generally entails combustion of fossil fuels. The transport of timber from the forest to primary milling facilities may in particular create emissions that reduce the net sequestration value of product carbon storage. However, attempts to quantify the effects...
Current economical situation in Finnish forest industry desperately calls for higher degree of efficiency in all stages of the production chain. The competitiveness of timber-based products directly and heavily depends on the raw material cost. At the same time, the successes of companies, that use timber, determine the volumes of the raw wood consumption and, therefore, drive forest markets. H...
چکیده ندارد.
RELATION OF SEVERAL FORMATION VARIABLES TO PROPERTIES Of PHENOLIC-RESIN-BONDED WOOD-WASTE HARDBOARDS
This paper presents the results of a Forest Products Laboratory study regarding the effects of resin content, particle size, and molding pressure upon specific gravity, strength, and water absorption of hardboard products made of wood waste treated with powdered phenolic resin. Modulus of rupture in bending was found to vary approximately as the cube of specific gravity, whereas water absorptio...
The gross wood properties of specifit' gravit1, pro. portion of laIetv17ud, and g,.owtb rate affected the strengths of fib!',.boards in ten.rion ana benJinf.. dJ well dJ their dimC1lsiollaJ stabilit,Fa,. the refining conditions ana' formation procedures .rtudied, and after allowance for the effect of boar" specific g,.ar'it1' mo.rt ~opertie.r were improved b, usittg fiber refil,ed from "ense wo...
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