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 26 for “"PH - Measurements"”.
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Observing the seasonal cycle of pCO2 from autonomous pH measurements in the South Atlantic sector of the Southern Ocean
… the role of the Southern Ocean (SO). Sea surface measurements across the SO are sparse and subject to temporal, spatial and seasonal biases. These biases arise from the inaccessibility of the SO due to the high-risk weather conditions and ice coverage experienced during the winter. This study …
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DEVELOPMENT AND TESTING OF A FLEXIBLE PLASTIC HYDROGEN ION-SELECTIVE ELECTRODE FOR IN VIVO pH MEASUREMENTS OF AIRWAY SURFACE LIQUID
… tract. This project aimed to develop a pH meter capable of measuring ASL pH in vivo through bronchoscopy, which involved optimizing the construction of long plastic H+-selective electrodes using polyethylene (PE) tubing, assessing their usability, and testing their effectiveness in a …
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A Polarographic Study of Zinc(II)-Glycine Interactions
… constant for complex formation: through pH measurements, described by Bjerrum; ion exchange, outlined by Schubert and Richter; methods based on Beer’s Law; oxidation potentials, described by Riley and Gallafent; and polarographic measurements, described by Lingane. | The formation …
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In situ High Pressure and Temperature 13C NMR for the Study of Carbonation Reactions of CO2
… about reaction rates, chemical exchange, and pH measurements throughout these reactions and the implications of the in situ measurements made during these reactions are discussed. A new method is used to elucidate pH under high pressure and temperature conditions which utilizes a calculation …
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An Evaluation of the Role of Temperature on the Safety and Quality of Raw Shellstock Oysters and Bluefish
… product unsafe. Spoilage was evaluated through pH measurements of a homogenate of the shucked meat and liquor. The olfactory acceptability of the raw oysters was evaluated in concert with the microbial and chemical evaluations. At all storage conditions, halophilic bacteria outgrew V. vulnificus …
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A Study of the Three Component System Sulfamic Acid - Magnesium Sulfamate - Water at 26°C
… has been shown both by conductometric and pH measurements. Also it has proven to be an excellent primary standard for use in quantitative analysis. Use of the Literature pointed out the fact that the Calcium, Barium, Magnesium salts of sulfamic acid are very soluble in water at various …
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Element substituted aluminophosphates
… hydrothermal crystallization of typical aluminophosphate gels with the adequate metal substrates at temperatures of 200°C, 150°C, and 150°C respectively. Samples of each material were calcined in oxidant, reducing and inert atmospheres and the properties of the treated solids studied by …
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Marine Applications of an Autonomous Indicator-Based pH Sensor
<p> Currently, the lack of accurate in situ pH measurements limits our understanding of natural pH variability. In order to predict future pH changes in the oceans, quality high temporal resolution pH data are needed. This work used the newly developed Submersible Autonomous Moored Instrument for …
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Marine Applications of an Autonomous Indicator-Based pH Sensor
<p> Currently, the lack of accurate in situ pH measurements limits our understanding of natural pH variability. In order to predict future pH changes in the oceans, quality high temporal resolution pH data are needed. This work used the newly developed Submersible Autonomous Moored Instrument for …
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Upconversion Nanoparticles for pH Sensing and Imaging
… applications in diagnostics/therapeutics require pH measurement down to the micro or nanoscale to provide relevant subcellular information, but the most widely used optical pH sensors (fluorescent dyes, dye-labeled quantum dots) suffer from drawbacks of photobleaching, blinking, and limited tissue …
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NMR Studies of Aqueous-Electrolyte Ion Sorption in Energy Storage Materials
… of LiTFSI (lithium bis(trifluoromethylsulphonyl)imide) aqueous electrolyte in activated carbon, a common electrode material for supercapacitors, are quantified by <sup>7</sup>Li and <sup>19</sup>F NMR. Apart from quantifying the electrolyte ions, the H<sub>3</sub>O<sup>+</sup> uptake by …
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Determining Optical Basicity of Molten Chloride Salts for Solar Thermal Applications
… molten salts are highly corrosive in atmospheres containing water and oxygen that are present in the CSP/TES. The salt can corrode the storage materials, typically nickel-based alloys, causing ruptures and subsequent plant shutdowns. In aqueous systems, pH can be a predictor of corrosion, …
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Development, manufacture and application of a solid-state pH sensor using ruthenium oxide
The measurement of pH is undertaken frequently in numerous settings for many applications. The common glass pH probe is almost ideal for measuring pH, and as such, it is used almost ubiquitously. However, glass is not ideal for all applications due to its relatively large size, fragility, need for …
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Interrogations of The Tumor Microenvironment Using Magnetic Resonance Imaging
… tumors. Accurate characterization of the two phenomena could provide important information to clinicians for devising suitable treatment plans. Tumor acidosis and hypoxia are closely linked to each other. Tumor acidosis is caused by the inclination of cancer cells towards anaerobic …
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Assessment of a methodology for determination of H[2]O[2] concentration and pH in exhaled breath condensate in horses with and without lower airway inflammation
… of hydrogen peroxide (H2O2) concentration and pH in exhaled breath condensate (EBC) is useful for detection and monitoring of diseases of the lower respiratory tract in humans, including asthma and chronic obstructive pulmonary disease. In contrast, limited information on the use of these …
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Chemical composition and pH of marine aerosols in the summer-time marine boundary layer of the Atlantic sector of the Southern Ocean
… despite this importance, the effects of aerosol pH on these processes are difficult to constrain, in part because there are no direct methods to measure aerosol pH. The lack of observations in the remote clean atmosphere makes quantification of aerosol pH even more challenging. This dissertation …
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Stabilisation of sulphide rich soil: problems and solutions
… 6%CaO) on various engineering properties of a sulphide (pyrites) rich, naturally occurring clay - Lower Oxford Clay (LOC) - were studied. Experimental tests representing, or relating to, tests outlined in the Design and Construction of Lime Stabilised Capping Specification (DoT, 1995) were …
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Mid-IR Imaging and Multivariate Analysis of Dynamic Processes in Pharmaceutically Relevant Microparticles
… characterized in terms of their size range, morphology and function. It is widely understood that the chemistry and morphology of microparticles have a degree of interdependence which strongly affects drug release behaviour from microparticles. This thesis investigates, for the first time, the …
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Comprehensive evaluation of cow dung digestate composition for potential soil fertilization: Advanced analytical techniques
… Action). This study aims to evaluate the physicochemical composition, nutrient bioavailability, and agronomic potential of CDD (Cow Dung Digestate) in South African agriculture, focusing on its impact on soil fertility, microbial activity, and environmental sustainability. A multi-faceted …
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