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 “"Saturation recovery"”.
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Instrument and Application Development in Saturation Recovery and Rapid Scan Electron Paramagnetic Resonance
… in EPR experiments at ca. 9 GHz (X-band). A new saturation recovery (SR) EPR spectrometer has been constructed with an AWG as the microwave source. Circuit design focuses on implementation of an X-band crossed-loop resonator with a reduced quality factor (Q) to minimize dead time due to resonator …
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Electron spin-lattice relaxation in two heme iron and two blue-copper proteins at liquid helium temperatures
… were measured at 9.5 GHz using the pulse-saturation recovery method. Measurements covered a temperature range of 1.4 K to as high as 22 K, with corresponding relaxation rates up to 10$\sp5$/sec. Improvements in the equipment and the methods of analysis have enabled more stringent tests of …
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Electron spin-lattice relaxation in YB3+ - doped silicate glass
… silicate glass have been measured using a pulse saturation/recovery technique at 9.5 GHz over the temperature range 1.5-7.0 K. Compared with similar measurements made on crystalline material, the temperature dependence of the recovery rates for the two-phonon Raman process is anomalously weak (T6 …
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Electron spin-lattice relaxation in ytterbium ion-doped silicate glass
… silicate glass have been measured using a pulse saturation/recovery technique at 9.5 GHz over the temperature range 1.5-7.0 K. Compared with similar measurements made on crystalline material, the temperature dependence of the recovery rates for the two-phonon Raman process is anomalously weak …
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Electron spin-lattice relaxation of cytochrome P-450 from Pseudomonas putida
… Ku-band frequencies using the technique of pulse-saturation recovery. The data for the low-spin species revealed an anomalous Raman 7 relaxation rate varying in the low temperature limit as T rather than T9 , the latter being expected for a Kramers ion. This anomaly is discussed and it is shown …
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Rapid Scan Electron Paramagnetic Resonance (EPR) and Digital EPR Development
… of modulation amplitude.</p> <p>A digital saturation recovery system based on an AWG was built at X-band (9.6 GHz). To demonstrate performance of the system, the spin-lattice relaxation time of a fused quartz rod was measured at room temperature with fully digital excitation and …
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Structural and functional pulmonary imaging using hyperpolzarized xenon-129
… and function of the lungs, Chemical Shift Saturation Recovery (CSSR), Xenon polarization Transfer Contrast (XTC) and Dixon, and their application to human studies for the first time are the focus of this work.</p><p>CSSR measures the global fractional gas transport, F(t) in the lungs. Using …
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The analysis of dynamic contrast-enhanced magnetic resonance imaging data: treatment effects, sampling rates and repeatability
… acquisition was performed using a dualsection saturation-recovery imaging method at 3T. It is shown that the acquired data were sub-sampled to a moderate temporal resolution. A separate study investigated the effects of B1 non-uniformity and found that the parameter results were only minimally …
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Measured electron spin relaxation rates in frozen solutions of azurin: Vitamin B12r and nitrosyl ferrous myoglobin
… The relaxation rates were measured by the pulse saturation/recovery technique. The temporal profiles of the recovery signals reported here for azurin and vitamin B 12r could not be characterized as exponential over their ent 1re recoveries. However, a system aU c estimate of the recovery rates …
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Saturating Quantum Relative Entropy Inequalities
This dissertation describes the progress made towards understanding several quantum entropies and their mathematical properties. Here, we shall focus on various quantum relative entropies, that measure distinguishability between two quantum states (or two entities). In particular, we will focus all …
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New MRI Techniques for Nanoparticle Based Functional and Molecular Imaging
… disease. Using our novel "Blood: flow)-Enhanced-Saturation-Recovery: BESR)" sequence, we successfully visualized reduced flow caused by thrombosis in carotid arteries and jugular veins, and we quantified the oxygen tension in the cardiac ventricles of the mouse. The BESR sequence depicted the …
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Solid-state NMR (¹³C, ²⁷Al and ²⁹Si) study of the reaction between AlMe₃ and the silica gel surface
… proton T1 values were measured by the saturation-recovery technique and the cross polarization relaxation time (TCH) and rotating-frame proton spin-lattice relaxation time (T1p) were measured using variable-contact-time experiments. The AlMen moieties in the initial AlMe3-reacted sample …