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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"pine wood"”.
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The effect of boiling test specimens of pine wood in linseed oil
Made available in DSpace on 2017-11-30T22:46:17Z (GMT). No. of bitstreams: 2 5956119.pdf: 394684 bytes, checksum: d750bf5bcfe9adfd9c29dcbb85c1de6d (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1893
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Analysis of intra-increment pulping and papermaking properties of loblolly pine wood
Loblolly pine growth increments were divided into five fractions; two earlywood a transition and two latewood growth zones. Each growth zone was analyzed for lignin, extractives, and carbohydrate content. Each fraction was digested to four different time schedules using kraft pulping process. All …
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The design of a plant to produce terpineol from destructively distilled pine wood wastes
no abstract provided by author
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A study on laser engraving process parameters and performance characteristics for wood base materials
… a study on the parameter of laser engraving on pine wood and WPC materials by using EleksMaker Laser A5-Pro model with low diode laser (500Mw, 405nm wavelength). The objective of this study was to investigate the effects of using input parameters such as scanning speed, burning time and laser …
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Nitrification of Landfill Leachate by Biofilm Columns
… was achieved by a packing media consisting of pine wood chips. The effects of varied concentration loading, varied hydraulic loading, and nitrification inhibitors were studied. Varied ammonia concentration did not have a huge impact on the ammonia removal rates (77-87%) in the reactor with pine …
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Catechyl-lignin tissues in Vanilla orchid and Candlenut: structure/property studies
… seed coat and candlenut shell to Southern Yellow Pine wood diffractograms. The Southern Yellow Pine wood diffractogram corresponds to a typical native cellulose in higher plants, that is cellulose I allomorph. Diffractogram XRD analysis on vanilla seed coat and candlenut shell shows similarities …
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CHARACTERIZING INTRA-ANNUAL XYLEM CELL FORMATION AND CIRCADIAN CYCLE DYNAMICS OF JACK PINE (PINUS BANKSIANA) IN THE NORTHERN BOREAL FOREST, YELLOWKNIFE, NORTHWEST TERRITORIES
… formation and stem radial fluctuations for jack pine in Yellowknife, NT were assessed during the 2017 season. The characterization of the timing of the onset of xylogenesis reactivation, period(s) of rapid cell development, and termination of seasonal stem growth were recorded over the estimated …
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Ablative pyrolysis of biomass
… high relative motion and high contact pressure, pine wood particles of maximum size 6.35 mm were successfully ablated.Sixteen experiments were carried out: five initial commissioning experiments were used to test the rotating blade concept and to solve char separation problems. Mass balances were …
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Are forests restricted by nutrient poor soils? : an analysis of soil nutrient stocks and associated vegetation in the fynbos biome, South Africa
The realized woody biomass of the Fynbos Biome in the Western Cape, South Africa falls below the climatic potential to support woody biomass. The lack of substantial tracts of woody forests has long puzzled ecologists, although patchy nutrient distribution and fire disturbance are thought to play a …
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Mechanical Properties of Lightweight Sandwich Panels with Corrugated Plywood Core
… sandwich panel structures sourced from Radiata pine wood, a renewable and biodegradable raw material. Major objectives were to characterise, and develop models to predict, key mechanical properties of the novel corrugated plywood sandwich core and overall sandwich structures. Tensile, bending …
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Optimising the airflow performance of ventilators for natural ventilation in buildings.
… ranged from ordinary slots fabricated from pine wood to commercial ventilators and mesh-screens as are commonly found in natural ventilation applications. The results of this investigation indicate that the overall airflow properties of a ventilator are influenced by the combination of …
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Fundamental studies of the behaviour of biomass and waste materials in gasification systems
… materials, cereal straw, short rotation coppice wood and pine round wood, and refuse derived fuels (RDF). These materials are increasingly being employed as renewable alternatives to fossil fuels in industrial energy conversion plants in Europe and elsewhere. Chars were prepared from all of the …
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Mode-I Fracture in Bonded Wood: Studies of Adhesive Thermal Stability, and of the Effects of Wood Surface Deactivation
… the use of mode-I fracture testing to evaluate wood adhesion. In the first study, mode-I fracture testing was used to compare the thermal stability of polyurethane (PUR) and resorcinol-formaldehyde (RF) wood adhesives. Bonded specimens for both adhesives were subjected to prolonged thermal …
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Influence of wood on the pyrolysis of poultry litter
… of layer manure. 400g of each feedstock: manure, wood (pine and oak), and mixtures of manure and wood in proportions (75:25 50:50, and 25:75 w/w %) respectively were subjected to fast pyrolysis at 450oC in a fluidized bed reactor. The total pyrolytic oil yield ranged from 43.3% to 64.5 wt%. The …
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Design, modeling and construction of a novel ablative fast pyrolysis reactor and product collection system
… of generating an ablation rate of 0.63 mm/s for pine wood at a temperature of 525 'DC with a relative velocity between the heated surface and reacting biomass particle of 12.1 m/s. The reactor achieved a maximum throughput of 2.3 kg/hr, which was the maximum the biomass feeder could supply. The …
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Tensile Properties of Loblolly Pine Strands Using Digital Image Correlation and Stochastic Finite Element Method
Previous modeling of wood materials has included many assumptions of unknown mechanical properties associated with the hierarchical structure of wood. The experimental validation of previous models did not account for the variation of mechanical properties present in wood materials. Little research …
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Environmental and developmental regulation of carbon cycling in a warm-temperate forest
… this region, where early-successional loblolly pines (Pinus taeda) were replaced by shade tolerant hardwoods such as oaks (Quercus spp.), hickories (Cayra spp.), and a suite of other species. NPP declined strongly with increasing age, from ~1000 gC m-2 y-1 at 15 years of age to a stable value of …
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Assessment of brown-rot decay using X-ray computer tomography and ultrasonic measurements
Loblolly pine (Pinus taeda) wood cube specimens were exposed to Gloeophyllum fungus (Gloeophyllum trabeum) for increasing periods of time ranging from one week to twelve weeks. The corresponding mass of each of these specimens was recorded before and after they were subjected to the controlled …