Browsing Theses by Title
Now showing items 6918-6937 of 15628
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Hydrobiogeophysics: Linking geo-electrical properties and biogeochemical processes in shallow subsurface environments
(University of Waterloo, 2018-12-13)Microbially mediated reactions drive (bio)geochemical cycling of nutrients and contaminants in shallow subsurface environments. Environmental forcings exert a strong control on the timing of reactions and the spatial ... -
The Hydrochemical Fate and Transport of Treated Domestic Wastewater Contaminants During a Wastewater Polishing Experiment in a Sub-Arctic Ladder Fen Peatland
(University of Waterloo, 2016-09-27)Protecting northern aquatic ecosystems is critical to ensuring the sustained use of these environments; however, with increasing industrial and residential development pressures in this region the safe and effective treatment ... -
Hydrodesulfurization and Hydrodenitrogenation of Model Compounds Using in-situ Hydrogen over Nano-Dispersed Mo Sulfide Based Catalysts
(University of Waterloo, 2010-10-29)Heavy oil derived from oil sands is becoming an important resource of energy and transportation fuels due to the depletion of conventional oil resources. However, bitumen and heavy oils have a low hydrogen/carbon ratio and ... -
Hydrodesulphurization of Light Gas Oil using Hydrogen from the Water Gas Shift Reaction
(University of Waterloo, 2009-08-25)The production of clean fuel faces the challenges of high production cost and complying with stricter environmental regulations. In this research, the ability of using a novel technology of upgrading heavy oil to treat ... -
Hydrodynamic Modeling of Dielectric Response in Graphene and Carbon Nanotubes
(University of Waterloo, 2006)This thesis studies two important carbon structures, graphene and carbon nanotubes, with the purpose of understanding how their three-dimensional electron density distribution affects the way fast ions interact with them. ... -
Hydrodynamic Modelling of the Electronic Response of Carbon Nanotubes
(University of Waterloo, 2007-02-08)The discovery of carbon nanotubes by Iijima in 1991 has created a torrent of new research activities. Research on carbon nanotubes ranges from studying their fundamental properties, such as their electron band structure ... -
Hydrodynamic Stability of Free Convection from an Inclined Elliptic Cylinder
(University of Waterloo, 2006)The steady problem of free convective heat transfer from an isothermal inclined elliptic cylinder and its stability is investigated. The cylinder is inclined at an arbitrary angle with the horizontal and immersed in an ... -
The Hydrodynamics of Pool-Riffle Sequences with Changing Bedform Length
(University of Waterloo, 2011-08-23)Previous research has demonstrated that pool-riffle bedforms play a critical role in channel stability and ecosystem health in many natural gravel-bed channels. Although the bedform length is known to scale with channel ... -
Hydrodynamics of the Yucatan peninsula carbonate aquifer: surface flow, inland propagation and mixing
(University of Waterloo, 2021-04-28)This thesis is a collection of three investigations into the hydrodynamics and hydrogeology of the Yucatan Peninsula, Mexico. The first investigation models potential mangrove-groundwater interactions as a box model. We ... -
The hydrodynamics of two-dimensional oscillating flows over ripples: the effect of asymmetries in ripple shape and currents
(University of Waterloo, 2017-04-28)The research presented in this thesis involved consideration of three increasingly asymmetric oscillatory flows over two ripple profiles, one of which is asymmetric and represents a small deviation from a symmetric ripple. ... -
Hydrogel Composite Adhesives Inspired by Algae and Mussels
(University of Waterloo, 2019-09-25)The ocean is a vast source of a multitude of materials used in daily life, but has also provided numerous sources of inspiration for creating novel bio-inspired materials. Marine mussels are one of the best-known marine ... -
A Hydrogel Microneedle-Assisted Assay Integrating Aptamer Probes and Fluorescence Detection for Reagentless Biomarker Quantification
(University of Waterloo, 2022-05-11)Analyzing interstitial fluid (ISF) via microneedle devices enables patient health monitoring in a minimally invasive manner and at point-of-care settings. However, most of the MN-based diagnostic approaches require complicated ... -
Hydrogel-Based Dye-sensitized Solar Cells
(University of Waterloo, 2024-04-23)Utilizing PVA-PANI hydrogel as a quasi-solid state electrolyte in DSSC enhances device stability and efficiency. The hydrogel matrix provides mechanical robustness and facilitates ion transport, improving charge transfer ... -
Hydrogel-Based Flexible Electronics Devices as Human Motion Sensors and Triboelectric Nanogenerators
(University of Waterloo, 2024-02-02)Flexible electronics is an emerging discipline in recent years because of its outstanding flexibility. It can be adapted to particular scenarios such as folded or bent, where conventional electronics are complex to apply. ... -
Hydrogen and Carbon Monoixde Electrochemical Oxidation Reaction Kinetics on Solid Oxide Fuel Cell Anodes
(University of Waterloo, 2013-08-30)Solid oxide fuel cells (SOFCs) are promising power generation devices due to its high efficiency and low pollutant emissions. SOFCs operate with a wide range of fuels from hydrogen (H2) to hydrocarbons, and are mainly ... -
A Hydrogen Hybrid Powertrain for the Union-Pearson Railway
(University of Waterloo, 2019-09-10)Canadian legislation attempts to regulate particle emissions released from the rail transportation sector. Assessment of the impact of rolling stock is the key to perform such regulations. Different strategies have been ... -
Hydrogen peroxide is vasoactive in the mesenteric arteries of spontaneously hypertensive rats
(University of Waterloo, 2008-05-22)It is well established that hypertension decreases endothelium-dependent vasomotor function, partially by excessive generation and reduced scavenging of reactive oxygen species (ROS). Nevertheless, at appropriate levels, ... -
Hydrogen Production and Utilization of Agricultural Residues by Thermotoga Species
(University of Waterloo, 2007-09-26)Abstract: Hydrogen can be a renewable energy source to replace conventional fossil fuels. Compared to current hydrogen production processes by consuming fossil fuels, biological hydrogen production has the advantage of ... -
Hydrogen Production by Desulfurococcus fermentans
(University of Waterloo, 2012-09-28)Desulfurococcus fermentans is a hyperthermophilic archaeon growing optimally at 82°C. This microorganism is an obligate anaerobe with optimal growth pH of 6.0. It is capable of producing H2 as an end metabolic product using ... -
Hydrogen Production From Catalytic Ethanol Reforming In Supercritical Water
(University of Waterloo, 2009-05-21)As a means to produce high pressure hydrogen in order to reduce compression penalty, we propose to reform liquid fuel (e.g., bio-ethanol) in supercritical water (pressure above 221 bar and temperature greater than 374°C). ...