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 32 for “"Aerodynamic diameter"”.
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Particle Motion in Flows: Contributions to Airborne Aerosol Measurement
… instrument is designed to sample and measure the aerodynamic diameter of particles in the size range of 1-30 mm. Knowledge of the aerodynamic size of a particle includes the impact of unknown variables such as shape, size and density of a particle. Particles of the same aerodynamic diameter have …
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Measurement and control of particulate emissions from cattle feedlots in Kansas
… measuring concentrations of PM with equivalent aerodynamic diameter of 10 µm or less (PM10), (3) evaluate the relative effectiveness of pen surface treatments in reducing PM10 emissions, and (4) predict PM control efficiency of vegetative barriers. Concentrations of PM with equivalent …
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Emissions and efficiencies of domestic appliances burning various fuels in South Africa
… (TSP) and particles less than 2.Sμrn aerodynamic diameter, were measured.
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Pure Insulin Nanoparticle Agglomerates for Pulmonary Delivery
… size, with particles between 1 and 5 microns in aerodynamic diameter being within the respirable range. Insulin nanoparticles were produced by titrating insulin dissolved at low pH to the pI of the native protein, and were then processed into microparticles using solvent displacement. Particle …
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Estimation of Pm-10 from vacant lands in the Las Vegas valley
… particulate matter less than 10 microns in aerodynamic diameter (PM-10). The question is whether the amount of fine particulates less than 10 {dollar}\mu{dollar}m in the soil can be used to predict the amount of PM-10 entering the air stream during a wind erosion event. Over one hundred …
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Bubble Dynamics and Dense Phase Composition in 2-D Binary Gas-Solid Fluidized Bed
… analysis (DIA) was employed to measure bubble diameter, bubble rise velocity, bed expansion and particle composition distribution. Magnetite and sand particles as pure and binary mixtures were used in the fluidized bed. Bubble diameter and bubble rise velocity both increased with the distance …
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Experimental study of electrostatic aerosol filtration at moderate filter face velocity
… bounce was assumed to occur with particles of aerodynamic diameter \u2265 400 nm. Electrostatic attraction, i.e. Coulombic, polarization and image forces were analyzed based on experimental data. The Coulombic force had the greatest effect on efficiency at all three filter face velocities, …
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Toxicity of manufactured particulate materials on plant root growth
… suggest that fine particles (particles with aerodynamic diameter smaller than 2.5 um, i.e., PM_{2.5}) have an association with various adverse health effects in humans. Mass studies have been performed on the toxicity and toxicological mechanisms of airborne particles such as PM_{2.5} and …
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Determining The Effectiveness Of Satellite Remote Sensing Products To Quantify Aerosol Pollution In The Semi-Arid Western U.S.
… endpoints and PM2.5 (particulate matter with an aerodynamic diameter smaller than 2.5 μm) concentrations. Satellite-derived PM2.5 estimates are relevant to improve the spatial resolution of air pollution concentration estimates due to the sparse number of PM2.5 monitoring stations. PM2.5 …
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An Improved Model for Prediction of PM10 from Surface Mining Operations
… common pollutant is particulate matter having an aerodynamic diameter less than 10 microns (PM10). The Industrial Source Complex (ISC3) model, created by the United States Environmental Protection Agency (U.S. EPA), is a model used for predicting dispersion of pollutants from industrial …
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Modified Release of Agglomerated Nano-Particles for Pulmonary Drug Delivery
… when inhaled particles have a 1-5 µm Mass Median Aerodynamic Diameter (MMAD). This project prepared agglomerated nanoparticles having modified drug release properties with an aerodynamic particle size suitable for delivery to the lungs.|First, a water-soluble model drug was formulated as …
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Ambient air pollution and cardiorespiratory outcomes amongst adult residing in four informal settlements in the Western Province of South Africa
… participant’s exposure to particulate matter of aerodynamic diameter of 2.5µm (PM2.5) and nitrogen dioxide (NO2). A questionnaire was adapted from the European Community Respiratory Health Survey and National Health and Nutrition Examination Survey questionnaire to collect data on self-reported …
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Ambient particulate matter as a trigger for acute exacerbations of asthma
… centre of Sydney (PM10 i.e. < 10 micron median aerodynamic diameter) via intranasal instillation. Asthmatic inflammation was quantified in terms of cellular recruitment and expression of relevant cytokines in bronchoalveolar lavage (BAL) fluid or airway tissue. Responses were compared to animals …
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Relationships of social and physical environmental factors with cardiometabolic outcomes
… with type I diabetes. Particulate matter with aerodynamic diameter <2.5 (PM2.5), proximity to heavily trafficked roads and annual average daily traffic count were associated with higher HbA1c in study site South Carolina, Colorado and Washington, but not in study site Ohio and California. …
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Development and in vivo Analysis of Inhaled Clofazimine for the Treatment of Pulmonary Tuberculosis
… for, batch yield, drug content, hydrodynamic and aerodynamic particle size distribution, antibacterial efficacy, cytotoxicity, and solubility. Moreover, formulations were also characterized for their solid state and particle morphology. Lead formulation was dosed in BALB/c mice to analyze the …
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Portable and Non-Intrusive Sensors for Monitoring Air Pollution
… is a global problem. Particulate Matter (PM) of aerodynamic diameter smaller than 2.5 μm (known as PM₂.₅) and NO₂ are important classes of pollutants because of their size and emission sources and potential effects of exposure beyond 25 μm/m³ and 40 μm/m³ annual mean respectively. This thesis …
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DRY POWDER INHALATION OF PNEUMOCOCCAL VACCINE USING POLYMERIC NANOPARTICLES AS CARRIERS
… fraction (FPF) of 74.31±1.32% and mass median aerodynamic diameter (MMAD) of 1.70±0.03 μm indicating that the majority of the dose would be deposited in the respirable airways of the lungs. The anionic and cationic PGA-co-PDL NPs upon incubation with DCs for 1 h showed an effective uptake as …
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Development of Aerosolizable mRNA Incorporated Chitosan Nanoparticles for Efficient Lung Delivery
… and was used for further studies. The aerodynamic characterization of these formulations was assessed using a vibrating mesh nebulizer, and particle size separation was performed using a Next-generation impactor (NGI). The aerodynamic characterization revealed that formulations had an …
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Creation and validation of an enhanced in vitro model of the lungs
… of aerosolized formulations in terms of their aerodynamic properties and particle size, and also in vitro, ex vivo and in vivo evaluation of the efficacy and the pharmacokinetic and pharmacodynamic properties of the formulations. However, a need is felt for improved models of aerosol testing, …
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Drug nanosizing using microfluidic reactors. Development, characterisation and evaluation of corticosteroids nano-sized particles for optimised drug delivery.
… NS of amorphous spherical particles 500 ± 64 nm diameter and zeta potential ¿18 ± 2.84 mV could be produced. The ocular bioavailability of a microfluidic precipitated HC NS (300 nm) was assessed and compared to a similar sized, milled HC NS and HC solution as a control. The precipitated and the …
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