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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 28 for “"Airborne Particles"”.
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The Chemical Characterization of Airborne Particles
Made available in DSpace on 2014-12-13T20:09:39Z (GMT). No. of bitstreams: 1 7606832.pdf: 4530690 bytes, checksum: c63cd36756d74c5d29a63b086c60d22c (MD5) Previous issue date: 1975
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Chemistry of airborne particles from metallurgical processing
Airborne particles fall into one of three size ranges. The nucleation range consists of nanoparticles created from vapor atom collisions. The decisive parameter for particle size and composition is the supercooling of the vapor. The accumulation range, which comprises particles less than 2 …
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Source receptor modeling of airborne particles collected over the Great Lakes
High-volume air samplers were used to collect aerosol samples on Whatman 41 air filters at the Canadian air sampling stations Burnt Island, Egbert and Point Petre. Once collected, the samples were analyzed for trace elements by neutron activation analysis. Air concentrations of over thirty trace …
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Design and construction of a device for light scattering studies on airborne particles
… (represented by the dielectric constant) of the particles affects the charging process. A non-contact method for particle charge measurement was also presented. In the second part of the chapter, the interaction between the electric field and the charged particle for the purpose of particle …
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Physical, chemical and biological properties of airborne particles emitted from animal confinement buildings
Item released from any restrictions by Sarah Shreeves (sshreeve@illinois.edu) on 2013-01-22T11:00:23Z
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Modeling the Spread of Airborne Particles Associated with Harmful Algal Blooms and Plumes of Colored Smoke
… not just limited to the water, but can become airborne through wave breaking, bubble bursting, and spume droplet formation. New information is needed regarding the transport and fate of HAB-associated aerosols. The overall goal of this research was to monitor particle concentrations and measure …
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Generation and imaging of structural laser beams for optical trapping of airborne particles and light-matter interaction applications.
… demonstrated for pipeline-guiding of sub-micron particles and biological macromolecules in experiments of protein nano-crystallography using x-ray diffracting imaging. The particle dynamical interaction with the beam relies on two fundamental light-induced effects that can be applied on matter, …
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Generation and imaging of structural laser beams for optical trapping of airborne particles and light-matter interaction applications.
… demonstrated for pipeline-guiding of sub-micron particles and biological macromolecules in experiments of protein nano-crystallography using x-ray diffracting imaging. The particle dynamical interaction with the beam relies on two fundamental light-induced effects that can be applied on matter, …
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Impact of the Tsumeb smelter waste on plant species diversity and structure in Tsumeb, north-central Namibia
… and gaseous emissions from the Tsumeb Smelter, airborne particles from the Tsumeb tailings pond and airborne particles from slag mill waste. Six sites: Inside Smelter Site, Outside Smelter Site, Abattoir Hill Site, Transnamib Site, Nomtsoub Site and Airport Site were selected and ten 10 m x 10 m …
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The significance of indoor:outdoor relationships, and physical and chemical composition in personal exposure to urban particulate matter
… there has been mounting evidence suggesting that airborne particulate matter may be responsible for the aggravation of a number of respiratory illnesses. Because of these health implications it is considered important to understand the sources of airborne particles, the pathways leading to human …
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Design of integrated capacitive sensors for particulate matter detection
… between electrode pairs will be affected by the airborne particles, flowing close to them, depending on the electrode geometry, the size and the relative electrical permittivity of the particles. Capacitive sensing is nowadays one of the most frequently adopted transduction methods in integrated …
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Design and Implementation of Mode Localised Resonant MEMS Oscillators for Gravimetric Sensing
… universe, which is of the order of 10^(26) m, airborne ultrafine particles have a diameter of less than 100nm. The adverse impact of these ultrafine airborne particles on human health has been the focus of numerous clinical studies, including respiratory and cardiovascular diseases. Empirical …
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Aerosol Samplers Comparison: IOM Dual Sampler (Inhalable & Respirable) vs Conventional Methods for Assessing Welders Exposure to Manganese
Occupational exposure to airborne manganese (Mn) is currently determined using National Institute for Occupational Safety and Health (NIOSH) and Occupational Safety and Health Administration (OSHA) analytical methods for particulate not otherwise regulated. The Institute of Occupational Medicine …
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Techniques for Mass Determination of Airborne Micro-Particles in an Optical Dipole Force Trap
… technique for rapidly measuring the masses of airborne particles confined in free space optical dipole force traps. This technique employs an ultrafast CMOS sensor with a wide field of view to image the real time motion of trapped particles on timescales in which diffusive Brownian motion …
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Toxicity of manufactured particulate materials on plant root growth
… are bringing large amounts of manufactured particles into the environment. Epidemiological studies 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 …
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Modeling and simulation of vehicle emissions for the reduction of road traffic pollution
… sector is responsible for the majority of airborne particles and global energy consumption in urban areas. Its role in generating air pollution in urban areas is even more critical, as many visitors, commuters and citizens travel there daily for various reasons. Emissions released by …
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Responses of respiratory system cells in vitro and in vivo to petrochemical combustion-derived ultrafine particles
Environmental contamination with airborne particles has been a human health concern for many years. Epidemiologic studies in urban communities have linked ambient particle exposure to various health effects, including chronic obstructive pulmonary disease, lung cancer, and several cardiovascular …
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Impact of Indoor Sources of Emission on Ambient Air Quality
… surfaces, leaving a small fraction of emissions airborne. I examined the involuntary exposure of passive indoor residents to THC and concluded adults and toddlers tend to uptake THC primarily through inhalation and non-dietary ingestion, respectively. I assessed strategies to mitigate exposure to …
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On the role of natural laboratories and natural experiments in elucidating cloud-aerosol-climate interactions: A story of ships, smoke, and shutdowns
Uncertainties in how airborne particles (aerosol) influence cloud reflectivity hinder our understanding of anthropogenic climate change. The study of aerosol-cloud interactions (ACI) is complicated by the difficulty of disentangling aerosol effects from other phenomena like meteorological …
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Automatic Particle Counting Using An Acoustic Transducer
… a microscope to determine the number and size of particles that were being removed from air. Today, most of the commercially available clean room airborne particle counters work on a light scattering principle. They are referred to as Optical Particle Counter or OPC. Essentially, they utilize a …
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