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 29 for “"pH sensing"”.
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Ion oxide silicon capacitor based pH sensing
… measuring intracellular and extracellular pH values. This thesis reports a novel technique that uses the basic principles of a MOSCAP. Based on its functionality, the device is termed as iOSCAP (Ion Oxide Silicon Capacitor). As the name suggests, the device consists of an ionic layer on top …
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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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Decoding Gating Properties of the Pannexin1 Channel: ATP Release and pH Sensitivity and the Potential Role in Health and Disease
… epilepsy and ischemia, with roles in important physiological processes including learning, memory and sensory function. In sensory systems, ATP release and purinergic signaling is considered the most important function of Panx1. Here, the function in the olfactory epithelium was investigated …
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Investigation and development of titanium nitride solid-state potentiometric pH sensor
The measurement of pH value is crucial parameter in various fields like, drinking water monitoring, food preparation, biomedical and environmental applications. The most common device for pH sensing is the conventional pH glass electrode. While glass electrodes have several advantages, such as …
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Multimaterial, multifunctional fiber-based designs for integration into minimally invasive and wearable, translatable medical devices
… glucose biosensor as well as a wearable sweat sensing glucose biosensor are presented. Moreover, a conductive fiber design is evaluated for pH sensing and integrative capabilities. Additional work and future areas of interest are discussed, exploring the versatility and reach of fiber-based …
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Responses to Antifungal and Alkaline pH Stress in Human Fungal Pathogens
… neoformans.</p><p>An alteration in extracellular pH is another one of the predictable changes that C. neoformans encounters in its shift from its environmental niche to the human host. This environmental increase in pH is internalized into microbial cells through the fungal-specific Rim signal …
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Non-canonical sensing mechanisms in bacteria
… in population density through quorum sensing. Additionally, bacteria have evolved chemosensory navigation machineries to sense chemicals around them and move towards nutrient-rich regions or away from toxins in the process known as chemotaxis. Chemotaxis has been extensively …
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Design, Synthesis, And Luminescence Properties Of Bridged Dimetallic Lanthanide Coordination Compounds
… Eu3+- and Tb3+-containing complexes. Solution-phase luminescence measurements and density functional theory (DFT)-optimized structures indicated that all complexes were nearly isostructural and contained a dimetallic lanthanide core bridged by three oxygen atoms that are covalently bound to the …
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Novel Electrochemical Methods for Acidity Monitoring: Theory, Design and Application
… the design and development of novel voltammetric pH sensors for buffered, low-buffered and unbuffered media. pH sensors in stagnant and hydrodynamic environments were designed and developed for performing measurements using square wave voltammetry. Chapter 1 introduces the motivation of this …
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Laser direct written silicon nanowires for electronic and sensing applications
… electronics and chemical/biological sensing devices due to their ultra-small body and high surface-to-volume ratios. However, the lack of the ability to assemble and position nanowires in a highly controlled manner still remains an obstacle to fully exploiting the substantial …
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Sensory Primary Cilium is a Distinct Signaling Compartment
… been established as a mechano, chemo- and osmosensing unit that transmits extracellular cues to the cell, which supports the importance of the primary cilium. As an important organelle involved in sensory functions and signal transductions, we encompass methodology for measuring cilia signaling …
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Sensor Technologies for Nutritional Management of Ruminants
… The overall goal of this work was to explore sensing technologies that could enable shifts in management to maximize productivity in ruminant production systems. In the first study, we assessed the use of existing sensor technologies to monitor ruminal volatile fatty acid (VFA) concentrations …
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Design, Fabrication, Testing of CNT Based ISFET and Characterization of Nano/Bio Materials Using AFM
… to develop the next generation ion concentration sensing system. Micro Electro-Mechanical System (MEMS) fabrication techniques, such as photolithography, diffusion, evaporation, lift-off, packaging, etc., are required in the fabrication of the CNT-ISFET structure on p-type silicon wafers. In …
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Investigation on Ultra-miniature and Ultra-low-power Non-invasive CMOS pH Sensor for Intracellular Monitoring
… compact solution for miniaturized noninvasive pH sensors. Existing solutions to intracellular sensing are mainly through invasive approaches, which will likely damage the target cell. However, learning what is going on inside the cell while keeping the cell alive and safe is highly demanded. …
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Nanobiotechnology Enabled Environmental Sensing of Water and Wastewater
… pollution. The need for environmental sensing has consistently been stressed as a means to minimize public health threats caused by such contaminants. Many analytical detection techniques have been developed and applied for environmental sensing. However, these techniques are often …
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Silicon-based pH sensor for biological and environmental applications
… hydrogen and hydroxyl ion concentrations (pH levels). Conventionally, the measurement processes take a considerable amount of time involving several calibration steps and handling of fragile electrodes. Here we propose a new, more robust and theoretically reliable way of sensing pH. …
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Electrolyte-gated graphene field-effect transistors : modeling and applications
… work presents a model for electrolyte-gated graphene field-effect transistors (EGFETs) that incorporates the effects of the double layer capacitance and the quantum capacitance of graphene. The model is validated through experimental graphene EGFETs, which were fabricated and measured to provide …
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NMR Sensing Strategies Based on Modulation of Chemical Exchange Rate With Small-Molecule Synthetic Sensors
… utilized to sense anions or detect changes in pH. The first section of the thesis describes a novel and ultrasensitive approach to detect anions indirectly by NMR and is based on a small synthetic sensor (TUC) displaying conformational rigidity due to intramolecular hydrogen bonding. With an …
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Structural and Functional Studies of SLO K+ Channels: Mechanisms of Gating by Intracellular Signaling
… in SLO1, Na<sup>+</sup> binding in SLO2 and pH increase in SLO3. It is known that intracellular signals activate SLO channels by acting on the large cytoplasmic domains (CTDs) of these proteins, which follows the transmembrane ionconduction pore. However, a molecular description of the …
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