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 22 for “"Electrostatic Charge"”.
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Electrostatic charge generation in hydrocarbon liquids
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1979.
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The feasibility of using electrostatic charge condition monitoring for lubricant additive screening
… work presented in this thesis assessed whether electrostatic charge monitoring, which is sensitive to changes in surface chemistry, can offer insight into additive-surface behaviour and how this affects tribological performance. Electrostatic sensors were deployed on tribological test apparatus …
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Numerical Analysis of Respiratory Aerosol Deposition: Effects of Exhalation, Airway Constriction and Electrostatic Charge
… to this study, numerical predictions of electrostatic charge effects on aerosol transport and deposition in the ACI were presented. Charges consistent with standard pharmaceutical pressurized metered dose inhalers and dry powder inhalers were considered. The numerical predictions …
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INFLUENCE OF ELECTROSTATIC CHARGE UPON THE DEPOSITION BEHAVIOR OF PHARMACEUTICAL AEROSOLS WITHIN CASCADE IMPACTORS
… 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 …
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Biomolecular ligand design : enhancing binding affinity and specificity utilizing electrostatic charge optimization and packing techniques
… were developed. These methods involve electrostatic charge optimization techniques and packing considerations. First, a detailed investigation of a transition state analog (TSA) binding to the E. coli chorismate mutase enzyme was performed. This study included an electrostatic component …
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Detecting DNA Using Silicon Nanopores and 20--40 Nm Gate-Length RFNMOSFET
… in a MOS-capacitor membrane to sense the charge in DNA. As DNA translocates the nanopore, the electrostatic charge distribution should polarize the capacitor and induce a voltage on the electrodes, which will be measured by our nanotransistors implemented right next to them. Silicon …
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Design and Experimental Characterization of Electrostatically Assisted Automotive Fuel Injectors
… during engine operation. By introducing electrostatic charge to the fuel as it is injected, a means of altering the injector spray pattern without changing the mass injected is available. A commercially available automotive fuel injector was modified to apply electrostatic charge to the …
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Particle sensors based on amplified quenching of conjugated polymers for biosensing applications
… approach. CP core particles, because of their electrostatic charge, suffer from nonspecific interactions with other charged species, and thus encapsulating CP particles with a hydrogel shell should create sensor materials with higher specificity.
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Optimal Point Charge Approximation: from 3-Atom Water Molecule to Million-Atom Chromatin Fiber
… determined by their accurate treatment of electrostatic interactions in the target biomolecular structure. In practical molecular simulations, the electrostatic charge density of molecules is approximated by an arrangement of fractional "point charges" throughout the molecule. While …
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Development of conductive sheet composite based on kenaf fibre loaded with polyaniline for anti-static packaging application.
… test, water absorption test, DC conductivity, charge decay time, and shielding effectiveness. The modified sheets were suggested to be optimum at 5wt% of PANI coating based on mechanical, physical, and electrical evaluations. The mechanical integrity showed a slightly reduced compared to the …
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Multiscale Simulations of Phosphatidylinositol Bisphosphate: Understanding Its Biological Role Through Physical Chemistry
… lipid head groups, such as those mediated by the electrostatic charge of the lipid. Most eukaryotic lipids are zwitterionic or have a charge of -1 at physiological pH, but some lipids such as phosphatidylinositol bisphosphate (PtdInsP2) bear a net charge of -4. The ability of these highly charged …
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The Effect of Water Chemistry on the Properties of Iron Particles and Aqueous Iron Suspensions Derived From the Oxidation of iron(II)
… mineralogy, adsorptive characteristics, and electrostatic charge were examined. Suspension color (apparent and true), turbidity, and particle stability were monitored. The impact of water quality including pH, dissolved inorganic carbon (DIC), silicate, orthophosphate, and several …
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Quantitative all-atom and coarse-grained molecular dynamics simulation studies of DNA
… unusual physical properties. The mechanical and electrostatic properties of DNA are utilized extensively by cells in the replication, regular maintenance, and expression of their genetic material. This can be illustrated by considering the journey of a typical gene regulating protein, the lac …
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Effects of macromolecular crowding and small ions on the folding, structure, and stability of Desulfovibrio desufuricans flavodoxin
… much is still unclear concerning how small, charged ions affect protein properties. This thesis summarizes in vitro work assessing the effects of macromolecular crowding and small ions on the biophysical properties of a model protein -- Desulfovibrio desulfuricans flavodoxin. Flavodoxin is a …
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Enhancement of fluidization and filtration using nanoparticle agglomerates and aerogels
… such as the presence of pressure fluctuations, electrostatic charge effects, magnetic, vibration and centrifugal (in a rotating fluidized bed) assisted fluidization, jet assisted fluidization and mass transport rates during humidification and drying of hydrophilic fluidized nanopowders. The …
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Charged interfaces and their applications in energy sustainability
… advanced methods by leveraging interfacial charge to make these renewable and non-renewable energy systems more sustainable and efficient. First, we demonstrate a novel approach based on active electrostatic charge induction for charging and electrostatically repelling dust from solar …
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Entomopathogen based autodissemination for the control of plodia interpunctella (Hübner): an examination of the critical components
… transmission and effect on mating of two electrostatic entomopathogen delivery powders (Entomag™ and Entostat™) was made to evaluate their potential as a component of an autodissemination method for the control of P. interpunctella. Both powders were shown to have some effects on mating …
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Design and Numerical Simulation of the Real-time Particle Charge and Size Analyser
The electrostatic charge and size distribution of aerosol particles play a very important role in many industrial applications. Due to the complexity and the probabilistic nature of the different charging mechanisms often acting simultaneously, it is difficult to theoretically predict the charge …
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The Influence of Branching and Intermolecular Interactions on the Formation of Electrospun Fibers
… was also investigated to discern the role of electrostatic interactions on electrospun fiber formation. In particular, the polyelectrolyte solutions formed nano-scale electrospun fibers with an average fiber diameter 2 to 3 orders of magnitude smaller than neutral polymer solutions of …
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