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Dissertations / Theses on the topic 'Aerosols Aerosols Electrostatics'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Kwok, Philip Chi Lip. "Electrostatics of aerosols for inhalation." Thesis, The University of Sydney, 2007. http://hdl.handle.net/2123/1934.

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Electrostatics of aerosols for inhalation is a relatively new research area. Charge properties of these particles are largely unknown but electrostatic forces have been proposed to potentially influence lung deposition. Investigation on the relationship between formulation and aerosol charging is required to understand the fundamental mechanisms. A modified electrical low pressure impactor was employed to measure the particles generated from metered dose inhalers and dry powder inhalers. This equipment provides detailed size and charge information of the aerosols. The particles were sized by

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2

Kwok, Philip Chi Lip. "Electrostatics of aerosols for inhalation." Faculty of Pharmacy, 2007. http://hdl.handle.net/2123/1934.

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PhD<br>Electrostatics of aerosols for inhalation is a relatively new research area. Charge properties of these particles are largely unknown but electrostatic forces have been proposed to potentially influence lung deposition. Investigation on the relationship between formulation and aerosol charging is required to understand the fundamental mechanisms. A modified electrical low pressure impactor was employed to measure the particles generated from metered dose inhalers and dry powder inhalers. This equipment provides detailed size and charge information of the aerosols. The particles were si

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3

Trottier, Remi A. "Enhancement of the collection efficiency of fibrous filtration in the region of maximum penetration." Thesis, Loughborough University, 1996. https://dspace.lboro.ac.uk/2134/10541.

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The various topics investigated in the course of the preparation of this thesis can by unified under the common theme of fibrous fIltration enhancement from both experimental and theoretical perspectives. Fibrous filtration is by far the most common method of gas pUrification in use today and further improvements will require a better understanding of the various mechanisms contributing to the collection of particles. The lack of agreement between experimental results and the latest theoretical models found in the literature which have been put forward to predict fIlter efficiency led to the d

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4

Vinchurkar, Samir C. "Numerical Analysis of Respiratory Aerosol Deposition: Effects of Exhalation, Airway Constriction and Electrostatic Charge." VCU Scholars Compass, 2008. http://hdl.handle.net/10156/2014.

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Thesis (Ph. D.)--Virginia Commonwealth University, 2008.<br>Prepared for: Dept. of Mechanical Engineering. Includes bibliographical references (leaves 212-233). Also available online via the Internet.

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5

Ong, Chun Hoe. "Electrostatic precipitator to collect large quantities of particulate matter." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5976.

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Traditional aerosol samplers are limited in their abilities to collect large quantities of particulate matter due to their low flow rates, high pressure drops, and are noise intrusiveness. The goal of this study was to develop an alternate aerosol sampler using electrostatic precipitation technology that was safe and not noise intrusive to be deployed in homes. The O-Ion B-1000 was selected as the most suitable electrostatic precipitator (ESP) for achieving the goal of this study because of its affordability, the design of its collection electrode and its high flow rate. The collection efficie

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6

Wong, Jennifer. "Electrostatic Charging in Pharmaceutical Aerosols for Inhalation." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14273.

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While electrostatic effects are well known and can be observed all around us, it remains among the most poorly understood areas of physics. Pharmaceutical aerosols delivered by dry powder inhalers (DPIs) are known to carry bipolar charges that may influence lung deposition. Although the relationship between the magnitude and polarity of charges on total and regional lung deposition in human subjects is unclear, an important step towards understanding this relationship requires the accurate measurement of pharmaceutical aerosol charges. Hence, this thesis is focused on characterising electrosta

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7

Peart, Joanne. "Electrostatic charge interactions in pharmaceutical dry powder aerosols." Thesis, University of Bath, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494185.

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Dry powders for inhalation, although clinically effective, tend to be inefficient in terms of the extent and reproducibility of drug delivery. In part at least this is due to an inadequate understanding of the relevant particle-particle interactions between drug and drug, and drug and carrier. Electrostatic charge interactions are one of several factors influencing the overall efficiency of an inhalation powder. The practical significance of such interactions is considered to be critical in every aspect of the powder formulation, including the formation of an ordered mix and, more importantly,

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8

Wilson, Lester W. "Piezoelectric sensors incorporating electrostatic focusing and automated cleaning for personal aerosol monitoring." Thesis, Glasgow Caledonian University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308328.

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9

Telenta, Marijo. "AEROSOL CALCULATION AND PRESSURE DROP SIMULATION FOR SIEVING ELECTROSTATIC PRECIPITATORS." Ohio University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1172857667.

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10

Mohan, Megha. "INFLUENCE OF ELECTROSTATIC CHARGE UPON THE DEPOSITION BEHAVIOR OF PHARMACEUTICAL AEROSOLS WITHIN CASCADE IMPACTORS." VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/423.

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Cascade impactors, routinely used for in vitro particle size characterization of pharmaceutical aerosols, are calibrated using dilute, charge-neutralized, monodisperse aerosols. But pharmaceutical aerosols are known to generate concentrated, inherently charged, polydisperse aerosol clouds. A computational model of the Andersen Cascade Impactor (ACI) suggested that the presence of charge on aerosol particles may influence their deposition within the ACI, but experimental validation of the model is warranted. This dissertation investigates the influence of electrostatic charge upon the dep

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11

Vijapur, Santosh H. "Design optimization and experimental study of a wet laminar electrostatic precipitator for enchancing collection efficiency of aerosols." Ohio : Ohio University, 2008. http://www.ohiolink.edu/etd/view.cgi?ohiou1227020758.

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12

Ettori, Maxime Philippe. "A new electrostatic precipitator for breath-borne aerosol: preliminary study and tests." Thesis, KTH, Mikro- och nanosystemteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-117737.

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The goal of this master thesis was to preliminary study, design and test a new electrostatic precipitator (ESP) for the capture of human breath-borne aerosol. This system needs to collect aerosolized bacteria/viruses in exhaled droplets, while being compatible with an open interface micro-fluidic system, in which an integrated bio-sensor will detect their presence. The final system may constitute an efficient point-of-care test for lower respiratory tract infection diagnoses. The number of exhaled droplets and the amount of pathogenic material being extremely low, the system needs to provide a

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13

Hashish, A. H. "The influence of electrostatic charge on the deposition of therapeutic aerosols and airborne pollutant particles within the human respiratory system." Thesis, University of Southampton, 1988. https://eprints.soton.ac.uk/421956/.

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14

Li, Ke. "Experimental and theoretical study of sub-micron aerosol collection efficiency by Laminar Wet-Membrane electrostatic precipitator." Ohio University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1177439835.

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15

Vijapur, Santosh H. "Design Optimization and Experimental Study of a Wet Laminar Electrostatic Precipitator for Enhancing Collection Efficiency of Aerosols." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1227020758.

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16

Chen, Yang. "The influence of device and formulation parameters on aerosol electrostatics for pressurised metered dose inhalers." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/13568.

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The aim of this thesis was to investigate the fundamental elements that influence aerosol electrostatic charge and performance of pressurised metered dose inhalers (pMDI). This was achieved by focusing on both physical and chemical parameters of the pMDI system, including orifice materials, geometries and formulation parameters. The electrostatic charges generated from pMDIs were successfully quantified using a modified Electrical Low Pressure Impactor (ELPI) and the magnitude and polarity of aerosol charges were found to be dependent on the actuator materials, nozzle geometries and the formul

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17

Štefánek, Stanislav. "Odlučování olejového aerosolu z odpadního vzduchu ve výrobním provozu s obráběcími automaty." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229519.

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This master thesis deals with the filtration of air contaminated with oil and the total efficiency and propose a new filtration system. The reason is insufficient capacity and functionality of the operating device is incorrect. It will propose the most appropriate solution to this in terms of economic and technical design is satisfactory.

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18

Yu, Jiaqi. "Effects of Humidity and Excipients on Aerosol Performance and Electrostatic Charge of Spray-dried Powders for Inhalation." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/18386.

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Relative humidity (RH) or moisture content in the environment is an imperative factor that needs to be considered when it comes to the stability-related issues of inhaled dry powder formulations. Spray drying is one primary used technique for producing inhalable powders. However, it is a process that often leaves the powders amorphous and physically unstable. The existence of amorphous materials in pharmaceutical powders can affect the processing, storage, and delivery properties. If stored improperly, amorphous powders would absorb relatively large amounts of water from the surrounding, impac

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19

Shah, Hardikkumar G. "PERFORMANCE EVALUATION OF WET PLATE ESP FOR SUB-MICRON PARTICLES." Ohio University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1141954317.

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20

Mello, Rafael Lopes Seabra de. "Estudo do mecanismo eletroforético de coleta na filtração de aerossóis." Universidade Federal de São Carlos, 2007. https://repositorio.ufscar.br/handle/ufscar/3983.

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Made available in DSpace on 2016-06-02T19:56:29Z (GMT). No. of bitstreams: 1 DissRLSM.pdf: 989402 bytes, checksum: e395689272b987229996f5143b06b63d (MD5) Previous issue date: 2007-05-18<br>Universidade Federal de Sao Carlos<br>Previous works have shown that the presence of electrostatic forces in particles significantly affect the performance of a filter, both increasing collection efficiency and reducing pressure drop. Recently, in the Environmental Control research group of the Chemical Engineering Department of UFSCar, Rodrigues (2005) have studied the filtration of electric charged pho

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21

Rodrigues, Marcos Vinícius. "Determinação da carga eletrostática em aerossóis e seu efeito na filtração de gases." Universidade Federal de São Carlos, 2005. https://repositorio.ufscar.br/handle/ufscar/3964.

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Made available in DSpace on 2016-06-02T19:55:42Z (GMT). No. of bitstreams: 1 TeseMVR.pdf: 2984636 bytes, checksum: 7a4e26302aeada36a4e2b3594d857fdc (MD5) Previous issue date: 2005-05-06<br>Universidade Federal de Sao Carlos<br>It has been shown that the presence of electrostatic charges in particles affects significantly the performance of a filter, both increasing collection efficiency and reducing pressure drop. The aim of the present work is to verify the influence of the charge level on collection efficiency during the first stages of filtration. A charge classifier was used to measure t

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22

Falaguasta, Maria Carolina Ribeiro. "Estudo do desempenho de um precipitador eletrostático operando na captura de partículas submicrométricas e nanométricas." Universidade Federal de São Carlos, 2005. https://repositorio.ufscar.br/handle/ufscar/3969.

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Made available in DSpace on 2016-06-02T19:55:43Z (GMT). No. of bitstreams: 1 TeseMCRF.pdf: 11090482 bytes, checksum: acd91fb03f2001e7f8897df596f44b7d (MD5) Previous issue date: 2005-05-24<br>Universidade Federal de Minas Gerais<br>The removal of submicron particles from gaseous streams is becoming an increasingly important operation, both in industrial (nanotechnology) as well as in occupational (inhalation of particula te matter) applications. Among the equipments commonly employed for the removal of particula tes of the gaseous stream, the electrostatic precipitator, ESP, is the one capabl

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23

Mouret, Guillaume. "Étude de la filtration des aérosols nanométriques." Thesis, Vandoeuvre-les-Nancy, INPL, 2008. http://www.theses.fr/2008INPL063N/document.

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Cette étude vise à une meilleure compréhension des phénomènes rencontrés en filtration des aérosols nanométriques, c’est-à-dire inférieurs à 100 nm, neutres et/ou chargés. Pour ce faire, trois différents types de média ont été étudiés : des grilles, en acier et matières synthétiques, des filtres non tissés, en fibres de verre ou polymériques, et des lits granulaires, constitués de billes d’acier ou de zéolithe. Il ressort des résultats expérimentaux obtenus que quel que soit le média testé, l’efficacité de collecte des particules augmente lorsque le diamètre de l’aérosol diminue, et ce jusque

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24

Pardon, Gaspard. "From Macro to Nano : Electrokinetic Transport and Surface Control." Doctoral thesis, KTH, Mikro- och nanosystemteknik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144994.

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Today, the growing and aging population, and the rise of new global threats on human health puts an increasing demand on the healthcare system and calls for preventive actions. To make existing medical treatments more efficient and widely accessible and to prevent the emergence of new threats such as drug-resistant bacteria, improved diagnostic technologies are needed. Potential solutions to address these medical challenges could come from the development of novel lab-on-chip (LoC) for point-of-care (PoC) diagnostics. At the same time, the increasing demand for sustainable energy calls for the

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25

Kremer, Erik Paul. "Electrostatic collimation of aerosols and the enhancement of fine particle sampling." 2006. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=449827&T=F.

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26

Davis, Claire Elisabeth. "An electrostatic approach for producing nanoparticulate membranes using laser ablation of microparticle aerosols." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4254.

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The Laser Ablation of Microparticle Aerosols (LAMA) process produces nanoparticles by ablating microparticles that are entrained in an aerosol. Two of the main advantages of this process are that the particles produced are charged (preventing agglomeration) and bare (without a capping layer). Two different techniques are possible to collect the nanoparticles. In this work, the charged state of the particles formed was utilized to collect them electrostatically. This approach has the additional advantage that particles can be selected according to their size. The focus here was a particular app

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27

Chen, Tsan Yu, and 陳贊宇. "Research and development of aerosol particle electrostatic suspension control system." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/63432672702670639207.

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碩士<br>元智大學<br>機械工程學系<br>96<br>The aerosol particle is the solid or liquid particle suspend in the gas, and the electrodynamic balance (EDB) system is the important equipment which is adopted to capture the characteristic data of single charged particles for the scientific study of aerosol. This research analyzes the dynamic characteristic of the EDB system and introduces Labview Graphical Language software to set up the digital PID controller, joining the primitive EDB system with the image feedback for making the EDB system with the single-axial electrostatic suspension ability, and utiliz

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28

Liu, Li-Chun, and 劉力群. "Research on the Electrostatic Charge and Charge Neutralization of Test Aerosol Particles." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/33209281213671326203.

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碩士<br>國立交通大學<br>環境工程所<br>91<br>In this research, an aerosol charge analyzer was made to analyze the electrostatic charge carried by the test NaCl particles generated in the laboratory. A radioactive electrostatic charge neutralizer was also built to neutralize particle electrostatic charge. NaCl particles were generated either from (1) an atomizer, or (2) an atomizer and a tube furnace. NaCl solution concentration (w/w) ranged from 0.05-1%. Experiment data from the atomizer show that for particle diameter from 200 to 800 nm, the absolute average particle charge depends on the particle diamet

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29

"Direct determination of lead in aerosol by slurry AAS." 1999. http://library.cuhk.edu.hk/record=b5889890.

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Kin-Fai Ho.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1999.<br>Includes bibliographical references (leaves [61-66]).<br>Abstracts in English and Chinese.<br>Contents<br>ACKNOWLEDGMENT<br>ABSTRACT<br>Chapter CHAPTER 1 --- INTRODUCTION<br>Chapter 1.1 --- Air Pollution in Hong Kong<br>Chapter 1.2 --- Brief introduction of Particulate Matter<br>Chapter 1.2.1 --- Total suspended particulates<br>Chapter 1.2.2 --- Respirable suspended particulates<br>Chapter 1.2.3 --- PM2.5<br>Chapter 1.3 --- Lead in Air Particulate and its Harmful Effects on Human<br>Chapter 1.4 --- Air Sampling<br>Chapt

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