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 12 of 12 for “"chemical gradient"”.
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Advanced techniques for chemical gradient, eutectic metal, and crystallized polymer film additive manufacturing
… First, E-jet printing is used to manufacture chemical gradients in a hydrogel. A chemical gradient acts like a sort of chemically specific attractor that collects analyte in a specified regions. Although these devices have been made using a pipette before, E-jet manufactured devices were made …
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Functional gel for directed molecular transport and sensor applications
… and to establish a miniaturized, integrated chemical-analysis system. This dissertation focuses on the establishment of molecular transport systems in chemical gradient-imbedded gels and their integration with nanosensors. After the introduction in chapter 1, chapter 2 focuses on the effect …
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A Microfludic Assay Device for Study of Cell Migration on ECM-mimicking Suspended Nanofibers in Presence of Biochemical Cues
… cell migration in response to a chemoeffector gradient, plays a central role in many important biological process such as wound healing, cancer metastasis, and embryogenesis. In vivo, cells migrate on fibrous ECM, but chemotaxis studies are typically conducted on flat substrates which fail to …
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Hydrogels for Biomacromolecule Immobilization and Sensing
… proteins as well as lipids that can maintain a chemical gradient between the inside and outside of the hydrogel were prepared. Finally, design elements for surface-immobilized temperature responsive hydrogels that have utility for reversible biomacromolecule immobilization were investigated. …
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Structural studies of the mitochondrial F-ATPase
… rotary mechanism powered by an electro-chemical gradient, generated across the inner mitochondrial membrane by respiration. A detailed molecular description has been provided by X-ray crystallographic studies and "single molecule" observations of the mechanism of the F1 catalytic domain. …
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Multiscale characterization of carbon fiber-reinforced epoxy composites
… The IR absorption peak corresponding to the chemical cross-linking reaction increased in intensity relative to neighboring peaks in interphase regions near the carbon fiber surface. Additionally, a broadening of the hydroxyl peak consistent with increased amine concentration in control …
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Quantitative investigation of bacterial chemotaxis at the single-cell level
… Directed movement of cells in response to chemical stimuli is called chemotaxis. In bacterial chemotaxis, small extracellular molecules bind receptor proteins embedded in the cell membrane, which then transmit the signal inside the cell through a cascade of proteinprotein interactions. This …
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Insights into Glacial Terminations from a South Atlantic Perspective
… timing of the major breakdown in the density gradient of the ocean significantly lagged the breakdown in the chemical gradient, suggesting that changes in the deep ocean density structure were not the major driver of the deglacial rise in atmospheric CO\textsubscript{2 }. Changes in the …
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Microvortices In Droplets: Generation & Applications
… droplets are used as reaction containers for biochemical assays, enabling drastic reduction in assay volumes needed for modern life sciences research. To achieve this, basic laboratory processes such as mixing, detection, and metering must be emulated in the droplet format. Three important unit …
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Melt Inclusion Geochemistry
… As such, coupled petrographic examination and geochemical analyses of MI and host crystals can reveal information about crystal/melt processes in igneous systems that are difficult (or impossible) to assess through conventional methods. Many studies have used MI to monitor large scale petrogenetic …
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Synthesis and kinetic processes in designed polymers
… platform for the detection of biological and chemical species due to its ability to strongly enhance infrared absorption of a relatively narrow band of vibrational modes. However, SEIRA only detects molecules within order of 100 nm of the nanoantenna, and thus requires diffusion of analyte …
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Non-Equilibrium Transport Across Liquid Membranes Using Coordination Cages
… extracting molecules, offering potential for chemical separation systems. However, the equilibrium constraint within bulk liquid membrane systems limits molecular transport efficiency to 50%, hindering widespread adoption. This thesis addresses this limitation by innovatively propelling …