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 21 for “"electron spin resonance (ESR)"”.
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Electron-spin resonance oximetry in cellular systems and in vivo
In this thesis, techniques of electron spin resonance (ESR) were developed and applied to measurement of oxygen concentrations in cellular suspensions as well as in vivo systems.
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Electron Spin Resonance Measurements and Studies of Intracellular Oxygen Concentrations and Nitroxide Metabolism
… technique. We have employed the techniques of electron spin resonance (ESR) to measure intracellular oxygen concentrations.
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Optimization of a microwave resonator cavity to perform electron spin resonance measurements on quantum dots
… to improve on an ongoing experiment of detecting electron spin resonance (ESR) on AlGaAs/GaAs lateral quantum dots. The experiment is performed in a 2.5 Tesla magnetic field at temperatures around 100mK. A resonator cavity is used to expose the quantum dot to a perturbational microwave magnetic …
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RF instrumentation and system design for coherent control of anisotropic hyperfine-coupled electron/nuclear spin qubits
… Our system of interest employs a local, isolated electron spin to coherently control nuclear spins. Coupled electron/nuclear spins are a promising candidate for QIP: nuclear spins are used for information storage and computation due to their long coherence times, while the electron is used as a …
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Liposome Encapsulated Manganese Chloride as a Liver Specific Contrast Agent for Magnetic Resonance Imaging
… (Mn$\sp{2+}$) as a contrast agent for magnetic resonance imaging (MRI) of the liver. Previous work with liposomes had shown that liposomes were concentrated in the liver after intravenous injection. Uptake of the vesicles into tumors was shown to be negligible. This suggested the possibility …
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Effects of doping on the electronic properties of niobium triselenide
The results of magnetization, Electron Spin Resonance(ESR), and electrical resistivity measurements on both undoped and doped samples of the Charge Density Wave (CDW) material NbSe3 are reported. The magnetic studies show that both magnetic(V) and nonmagnetic(Ta) impurities may be introduced into …
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Helical Pitch, Hydrophobic Binding, Chiral Templation, and Supramolecular Chelation of M-Phenylene Ethynylene Foldamers
… conditions in solution. A series of double TEMPO spin labeled oligomers were studied by electron spin resonance (ESR) spectroscopy to determine the helical pitch of folded mPE oligomers. Based on the relative degree of broadening observed in the ESR spectra it was determined that there are …
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Dynamic proton polarization in some rare earth ethyl sulphates
… induced by saturating the forbidden, satellite electron spin resonance (ESR) line of the paramagnetic ion, and was measured by comparing proton nuclear magnetic resonance (NMR) signals. Becau.se of its higher hydrogen density, it was hoped that YES might be a better material than the …
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Ion Implantation and Characterization of High Temperature and High Performance Polymers
… were observed using Infrared (IR), Raman, and electron spin resonance (ESR) spectroscopies, scanning electron microscopy (SEM), Rutherford back scattering (RBS) spectroscopy, and elastic recoil detection analysis (ERDA) methods. Electrical conduction mechanisms in the implanted polymers are …
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Induced Phase Transition in Magnetoelectric BiFeO3 Crystals, Thin-layers and Ceramics
… properties. We have used high-field electron spin resonance (ESR) as a local probe of the magnetic order in the magnetic range of 0-25 Tesla. With increasing magnetic field, an induced transition has been found between incommensurately modulated cycloidal antiferromagnetic and …
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Preparation, Characterization, And Application of Liposomes in the Study of Lipid Oxidation Targeting Hydroxyl Radicals
… compared to the popularly-used technique of electron spin resonance, (ESR), our aim was to use a fluorescence-based approach which yielded the advantages of high sensitivity, fast analysis time, and less expensive equipment requirements. Degradation of fluorescently-tagged liposomes with …
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Identification and biophysical characterization of two intralysosomal pigments with free-radical properties and their synthetic models: Human neuromelanin and the minocycline-induced thyroid pigment
… of organic free radicals amenable to study by electron paramagnetic resonance (EPR, or equivalently, electron spin resonance, ESR) spectroscopy. In contrast to the usual histochemical tests, a set of EPR criteria has been established for the unambiguous identification of melanin; however, their …
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Effects of particles’ size and composition on magnetic properties of substituted ferrite nanoparticles
… of ferrites investigated by magnetization and electron spin resonance (ESR) spectroscopy. CuxMn1−xFe2O4, (Zn, Cd)Fe1.2Al0.8O4, NixCo1−xFe2O4 and Cu0.5Ni0.5Fe2O4 nanoferrites were produced by glycol-thermal reaction under a low reaction temperature of 200 ◦C. Structural properties were analysed …
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Exercise and Oxidative Stress: Implications in Health and Disease
… radical production as measured by <i>ex vivo</i> Electron Spin Resonance (ESR) spectroscopy and the by-products of lipid peroxidation.<br/><br/>It has been proposed that exercising in hypoxia may increase free radical production. Thus study one investigated the effects of aerobic exercise …
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Nanoscale magnetometry with a microcontroller-based magnetometer using a single nitrogen-vacancy defect in nanodiamond
… science because of its interesting optical and spin properties, such as high photostability and possibility of performing coherent control of their spin states even under ambient conditions. This makes the NV− defect attractive for the development of diverse application areas such as …
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Macrophages in vitro as a predictive model in polymer toxicology
… of Polymer 1 that were observed the rat lungs. Electron spin resonance (ESR) detected free radicals produced by the pro-inflammatory polymers and particles which had the ability to break bonds in super-coiled DNA and deplete intracellular glutathione (GSH). Microarray analysis of the canonical …
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Design and implementation of parity error detection in donor qubits in silicon
… of three qubit parity error detection in donor spin qubits in silicon. Three key results are presented: (i) the capacitative modelling and design of triple donor dot architectures needed to realise a parity device, highlighting the need for multi-donor quantum dots (ii) optimisation of the …
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Development and Implementation of Theoretical Methods for the Calculation of EPR Parameters in Periodic Simulations
… the theorem of Hohenberg-Kohn states that the electronic ground-state wave function of any molecular system is uniquely determined by the electronic ground-state density. The latter is a lot easier to handle than the many-body wave function, both conceptually and practically. Electron …
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TiO2 and ZnO metal oxides lattice defects driven magnetism and their contribution in discoloring of dyes
… such as X-ray diffraction spectroscopy, scanning electron microscopy, and atomic force microscopy among others. A close connection between photocatalytic degradation performance and photo-excited electron recovery/relaxation was observed. It was found that longer photo-excited electron …
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Ανασύνθεση παλαιοπεριβάλλοντος σε παράκτιες γεωμορφές της νότιας Κύπρου με την χρήση τεχνικών φωταύγειας
… minerals’ dating are cosmogenic radionuclides, Electron Spin Resonance (ESR) and luminescence techniques. The latter were initially used to date burned minerals from archaeological artefacts (Thermoluminescence (TL) method). However, advancements of this technique led to the development, of the …
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