نتایج جستجو برای: wood product
تعداد نتایج: 317891 فیلتر نتایج به سال:
The pressure on governments has been increased to improve their environmental performance across the globe. To ensure sustainability, every country is now responsible for educating its citizens policies decreasing pollution and managing natural resources. Therefore, it crucial manage all elements that have a negative impact country’s in order sustainability. This study’s main goal was investiga...
the major objectives of this study were to find out the mechanism behind the sapstaining fungal hyphae penetration into wood elements using electron microscope and to evaluate the exact role of phenolic compounds existing in wood vinegar towards the sapstaining fungal growth inhibition. to formulate the new environmental friendly wood preservative, we neutralized (to ph 7) wood vinegar with nao...
This study was an attempt to produce bio-oil from empty fruit bunches (EFB) of oil palm waste using fast pyrolysis technology. A 150 g/h fluidised bed bench scale fast pyrolysis unit operating at atmospheric pressure was used to obtain the pyrolysis liquid. A comparison of the elemental composition of unwashed and washed feedstock was made in this study. With the five methods of treatment being...
hemicellulose of southern yellow pine wood spices was extracted by pressurized hot water at three different temperatures: 140°c, 155°c and 170°c. compounding with pp (polypropylene) was performed by extrusion after preparing wood flour and sieving to determine its mesh size. the ratio of wood to polymer was 50:50 based on oven-dry weight of wood flour. all extraction treatments and control samp...
to evaluate the nutritive value in some lignocellulosic materials, 3 sets of experiments were conducted on aspen, and grape woods. to enhance the digestibility, the woods were treated with 5% naoh. throughout the first trial, chemical composition and digestibility coefficients of dry matter, organic matter and ndf of experimental feeds, ph of rumen, as well as palatability were evaluated while ...
High temperature heat treatment is one of the main technologies with highest market conversion rate and broad future prospects in functional technology wood. Chemical reagents are not added production process. The improves dimensional stability, biological durability, wood color, acoustic properties without reducing environmental performance product. However, there some problems treatment, such...
The plate of a pultruded fiber-reinforced polymer or fiber-reinforced plastic (FRP) profile produced via a pultrusion process is likely to undergo local buckling and cracking along the fiber direction under an external load. In this study, we constructed a pultruded glass-fiber-reinforced polymer-light wood composite (PGWC) profile to explore its mechanical performance. A rectangular cross-sect...
Generally the so-called Meyerhof-Embden scheme is considered to be the major pathway of hexose dissimilation by members of the genus Propionibacterium. Two lines of evidence supporting this premise are the isolation, coupled with a demonstration of their utilization, of several of the intermediates of glycolysis (Wood, Stone, and Werkman, 1937; Werkman, Stone, and Wood, 1937; Barker and Lipmann...
PREVIOUS work [O'Dwyer, 1934] has shown that the hemicellulose A of oak wood is a mixed polysaccharide containing anhydroxylose and uronic anhydride units and that the sapwood product differs from that obtained from heartwood in that it gives with iodine the blue colour which is characteristic of starch. It has since been shown [O'Dwyer, 1937] that the blue colour reaction given by the sapwood ...
Fast growing hybrid poplar trees are being plantation grown in the Pacific northwest of the United States and British Columbia for the production of chips for pulp. If allowed to grow somewhat longer (to a rotation age of 9-10 years) and achieve saw log size, the basal log(s) might be used to produce lumber for solid wood products with the remaining stem volume chipped. Solid wood product manuf...
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