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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 15 of 15 for “"pH response"”.
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Multilayer capsules with stimuli-sensitive properties : pH-response and carbohydrate-sensing
… Such capsules were prepared, with the focus on pH-sensitivity and carbohydrate-sensing. First, pH-responsive polyelectrolyte capsules were produced by means of electrostatic layer-by-layer assembly of oppositely charged weak polyelectrolytes onto colloidal templates that were subsequently …
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The Effect of Feeding, Bilateral Parotidectomy, and Pilocarpine Treatment on Parotid Hormone Secretion in the Pig
… and masticatory stimuli on parotid hormone (PH) secretion is reported. Feeding a regular chow was shown to be a potent stimulus for PH secretion. The parotid endocrine system is highly sensitive to the eating stimulus, since a period of feeding lasting 30 sec is enough to cause a significant …
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Electrical Response of Carbon Nanotubes Under Electrolyte
… transport, current fluctuations, and electron-phonon interactions have been explored by utilizing electrolyte top gated carbon nanotube based devices. Individual semiconducting nanotubes have shown a negative threshold voltage shift at low pHs. The potential offsets induced by surface charges …
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Nanoscale BioFETs for ultrasensitive pH and biomolecular detection
… of relevant molecules ranging from solution pH to proteins to nucleic acids. Such sensors are highly amenable to scale-up and mass production and are easily integrated with necessary external electronics for point-of-care diagnostic devices, or lab-on-a-chip systems. In particular, nanowire …
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Simulation of Weak Polyelectrolyte Brushes
… polyelectrolyte brushes (PEBs) and weak polyampholyte brushes (PABs) was examined with respect to pH, salt concentration, monomer sequence and grafting density. While PEBs have only acidic or basic monomers, PABs contain both types of monomers, resulting in more complex interactions that …
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Synthesis and rheology of pH-responsive particles with shape anisotropy
… produce large quantities of shape anisotropic, amphoteric particles in a size range of about 1 µm. Two different kinds of shape anisotropic particles are prepared for comparison to study the effects of incorporating pH-responsive groups on the properties of suspensions containing shape anisotropic …
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Direct Measurements of the Effects of Cyclic Adenosine Monophosphate, and Related Compounds, on Membrane Conductances, Intracellular Calcium and Ph in Gastropod Neurons (cyclic-Amp)
… intracellular injections of cyclic adenosine monophosphate (AMP) and related compounds were examined in identifiable gastropod neurons. Injecting cyclic AMP (or cyclic GMP) in amounts which should have elevated the internal concentration from 0.1-7.6 mM (mean = 3.3 mM) resulted in transient …
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Iron-oxide catalyzed silicon photoanode for water splitting
… presents an integrated study of high efficiency photoanodes for water splitting using silicon and iron-oxide. The fundamental limitations of silicon to water splitting applications were overcome by an ultrathin iron-oxide film stack and a pH-adjusted electrochemical environment. It was …
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Pathogen-Specific Adaptations to Conserved Signaling Pathways in Cryptococcus neoformans
… experiences are elevated temperature and high pH. </p><p>Conserved Rho and Ras family GTPases are central regulators of thermotolerance in C. neoformans. Many GTPases require prenylation to associate with cellular membranes and function properly. Using molecular genetic techniques, microscopy, …
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Polymer Dispersity Affects Conformation of Brushes Grafted on Nanoparticles
… partly due to uniform dispersion and/or morphology of polymer brushes with varying chain conformation. Polymer brush properties, such as grafting density \sigma and degree of polymerization N, can drastically affect conformation of neutral and pH-responsive PGNPs and further influence their …
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Chemical sensors based on swelling polymer microspheres and uncrosslinked fluorescently-labelled molecularly imprinted polymers
… binds a particular analyte. For example, at low pH, the particles in a hydrogel membrane swell in response to the increased hydrogen ion concentration and the membrane reflects less light. When the refractive index of the membrane is less than that of the particles, swelling decreases the …
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Active Learning-Closed-Loop Optimisation for Organic Chemistry and Formulations Research
… learning algorithm for the adjustment of the pH value within aqueous multi-buffered poly-protic buffer systems. Those solutions have tremendous importance in biological systems and are hard to model mathematically. By applying a data-driven optimisation I was able to model the pH response of …
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Microphysiometry Studies of Rapid Binding of Insulin-Like Growth Factor I by Parental and Transfected Mammary Epithelial Cell Lines
… is needed. This study examines the IGF-I response of SV40-IGF-I, an immortalized bovine mammary epithelial cell line which secretes IGF-I constitutively. The microphysiometer allows real-time sampling of cellular activity by measuring the excretion of protons from a sample of cells …
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Characterization of the instability elements present within the 3' UTR of the glutaminase mRNA in WKPT kidney cells
… by two 8-base AU-sequences that function as pH-response elements (pHRE). This sequence binds ζ-cryst and p40-AUF1 with high affinity and specificity. An in vitro mRNA decay assay was developed using cytosolic extracts of WKPT cells, a line of rat renal proximal tubule cells. A 28-nt segment …
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Development and Characterisation of a Carbon Based pH Microsensor and Studies on Polypyrrole Nanowires
… of polypyrrole (PPy) into nanowire and bulk morphologies is reported. The electrochemical properties of the different conformations of PPy were examined in order to ascertain their conductivities and surface areas. This could determine the optimisation for further modification of the polymer …