Global ETD Search
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 33 for “"particulate material"”.
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Fate and Transport of Endocrine Disrupting Compounds during Wastewater Treatment: The Role of Colloidal and Particulate Material
… suggesting that enhanced removal of particulate and colloidal material may improve EDC removal efficiency. Colloidal material was obtained from settled mixed liquor suspended solids (MLSS) collected from a pilot MBR and a full-scale activated sludge process that included anoxic and …
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Measurement, Characterization, and Source Apportionment of the Major Chemical Components of Fine Particulate Material, Including Semi-Volatile Species
… measure and characterize suspended atmospheric particulate matter. Semi-volatile material (SVM), consisting of ammonium nitrate and semi-volatile organic material (SVOM), is not accurately measured by EPA accepted methods such as the Federal reference method (FRM) or Tapered Element Oscillating …
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Relation of crystalline style function to food availability and environmental conditions in South African mussels
… budgets of mussels depends on the utilisation of particulate material from both kelp and phytoplankton production, which have very different structural complexities and biochemical compositions. There is very little information on the digestive enzymes of South African mussels. The activity of …
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Air quality assessment and the use of specific markers to apportion pollutants to source.
… qualitative analysis of volatile compounds and particulate associated material, both organic and inorganic. Volatile organic compounds were adsorbed onto various resins, while particulate material was sampled onto various filter paper types. Organics were determined by GC-AED and GC-MS, and …
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Effects of Bloom-Forming Algae on Fouling of Integrated Membrane Systems in Seawater Desalination
… organic matter. The highly fouling fraction was material large enough to be retained on a 0.22-microm microfilter but small enough that it was not removed by centrifugation or coarse (glass fiber) filtration. The algal cells themselves did not fall within this fraction since they were easily …
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Compressive Behavior of Simulated Explosive-Filled Composites
… adhesion research related to energetic materials has been focused on examining the interaction between explosive crystals and the substrate of interest. However, this neglects the effects of the binder material in compounds such as Composition C-4. These types of explosives are actually …
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Computational Study of the Effect of Interparticle Contact in Conductive Properties of Random Particulate Systems
<p>The effective conductivity of random particulate material system is computationally investigated using the Monte Carlo scheme and finite element method. A cubic system consisting of randomly-dispersed, equal-sized, deformable ellipsoids are modeled in this study. The steady-state conduction …
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Fermentation of uniformly labeled C14 glucose in vitro by micro-organisms of the bovine rumen
… for tracing C¹⁴ labeled glucose in rumen material in vitro. Twenty-five ml. samples of rumen fluid were incubated with uniformly labeled glucose for 1 1/2 hours in a closed system. The distribution of activity in both unfermented control samples and fermented samples was determined among …
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Transformations of carotenoids in the oceanic water column
… the oceanic water column were studied. Suspended particulate matter collected from surface waters of Buzzards Bay, Massachusetts and the Peru upwelling system has a carotenoid distribution reflecting the phytoplanktonic source of the material. The carotenoid distribution of sediment trap samples …
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Pneumatic Particulate Collection System for an Unmanned Ground Sampling Robot
The design of unmanned material collection systems requires a great deal of foresight and innovative design on the engineer's part in order to produce solutions to problems operators may encounter in the field. In this thesis, the development of a particulate collection system for use onboard a …
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Determination of sediment provenance at drift sites using hydrogen isotopes in lipids
… (haptophyte Emiliania huxleyi), surface ocean particulate material, and open ocean sediments to determine the extent and variability of hydrogen isotopic fractionation in the di-, tri-, and tetraunsaturated C₃₇ compounds. We then compared the [delta]D of the alkenones in surface sediments …
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Determination of sediment provenance at drift sites using hydrogen isotopes in lipids
… (haptophyte Emiliania huxleyi), surface ocean particulate material, and open ocean sediments to determine the extent and variability of hydrogen isotopic fractionation in the di-, tri-, and tetraunsaturated C37 compounds. We then compared the δD of the alkenones in surface sediments between the …
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Flow and solute transport in random cylinder arrays : a model for emergent aquatic plant canopies
… patterns and in the transport of dissolved and particulate material in the environment. However, the dependence of the hydrodynamic and transport processes on fundamental properties of an aquatic plant canopy has not been investigated systematically over the wide range of conditions that are …
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Some electrical properties of thin films of polypropylene formed by vacuum evaporation
… As a consequence of using different electrode materials, systematic differences in the behaviour of these films were found, even though the voltage-current characteristics remained ohmic. In these measurements there was evidence of electron trapping and the trap depth was estimated by using the …
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The role of weather and topography in the airborne dispersal of particulate matter in Kent
… data have been examined in relation to airborne particulate material (PM10) concentrations recorded at 17 pollution monitoring sites throughout Kent for the period 2000 to 2008, as an aid to understanding dispersal patterns in relation to topography. In general, local and synoptic wind direction …
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A Study of the Ecological Factors Influencing the Efficiency of the Activated Sludge System for Treating Organic Wastes
… destabilisation and adsorption of colloidal and particulate material from sewage. At high biomass loadings, the activated sludge settlement deteriorated, with a corresponding increase in quantity and water retention capacity of the extracted exocellular polymer. The addition of carbohydrate to …
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Simulating the atmospheric primary and secondary organic aerosols
Until recently, organic particulate material was simply classified as either primary or secondary with the primary component being treated in models as nonvolatile and inert. This framework is used to simulate the organic aerosol formation, growth and composition in the eastern United States during …
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Composition and bioavailability of DOC across a rural-urban gradient
… of land use on the relative proportion of particulate and dissolved organic carbon, and the importance of different size fractions of the total organic carbon pool in driving biochemical oxygen demand (B.O.D.₅) was assessed under base flow and storm flow conditions. Despite an expectation …
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Distribution of Colloidal Material in Activated Sludge as Influenced by Cations
… protein and polysaccharides were found in material larger than 0.45μm in activated sludge influent. Humic acids were mostly found in material smaller than 0.45μm. Protein was the largest contributor to organic nitrogen and humic acids were the largest contributor to organic carbon. Using …
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Analysis of Endogenous Particles in Exhaled Air
Exhaled air contains non-volatile particulate material from the respiratory tract. The precise location in which exhaled particles are formed is unknown, and details on their chemical content are scarce. The aim of this work was to chemically characterize and to study the mechanisms of formation of …
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