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Full-Text Articles in Medicine and Health Sciences
Particles In Welding Fumes, Rebecca T. Williams
Particles In Welding Fumes, Rebecca T. Williams
USF Tampa Graduate Theses and Dissertations
The purpose of this study was to investigate whether or not differing base metals and filler wires used during welding processes contributed to differing amounts of ultrafine particles (UFP) and nanoparticles being emitted during the welding procedure. The study was also conducted to determine UFP and nanoparticle exposure in the breathing zones of the welders as well as the breathing zones of pipefitters and fire watchers, who commonly sit 6ft behind the welding arc. In order to determine if UFP and NP exposures differed with base metal and filler wire, all welding processes utilized the same welding machine for metal …
Generation And Characterization Of Nanoaerosols Using A Portable Scanning Mobility Particle Sizer And Electron Microscopy, Adam J. Marty
Generation And Characterization Of Nanoaerosols Using A Portable Scanning Mobility Particle Sizer And Electron Microscopy, Adam J. Marty
USF Tampa Graduate Theses and Dissertations
The purpose of this research is to demonstrate the ability to generate and characterize a nanometer sized aerosol using solutions, suspensions, and a bulk nanopowder, and to research the viability of using an acoustic dry aerosol generator/elutriator (ADAGE) to aerosolize a bulk nanopowder into a nanometer sized aerosol. The research compares the results from a portable scanning mobility particle sizer (SMPS) to the more traditional method of counting and sizing particles on a filter sample using scanning electron microscopy (SEM). Sodium chloride aerosol was used for the comparisons. The sputter coating thickness, a conductive coating necessary for SEM, was measured …
Modulating The Pharmacokinetics Of Bioflavonoids, Adam John Smith
Modulating The Pharmacokinetics Of Bioflavonoids, Adam John Smith
USF Tampa Graduate Theses and Dissertations
One of the largest obstacles in drug development is to overcome solubility and bioavailability problems. Preformulation strategies such as nanoparticle formation are often employed but sometimes create new issues and are limited in their effectiveness and applications. Since the majority of drugs are marketed and sold as solid forms, drug delivery systems are not always desirable. This is where solid-state chemistry becomes important. Traditional solid-state chemistry approaches are often successful but are sometimes too restrictive and cannot be applied to certain compounds. Cocrystals have emerged as an alternative solid-state technique that can be applied to a broad range of compounds. …