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 133 for “"spectroscopic analysis"”.
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Spectroscopic analysis of selected silicon ceramics
… of this thesis is to present measurements and analysis of four different silicon ceramics: α, β and γ phases of silicon nitride and silicon oxynitride using soft x-ray spectroscopy, which analyses the electronic structure of materials by measuring the absorption and emission of x-ray radiation. …
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Spectroscopic analysis of a magnetoplasma dynamic arcjet
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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The Advanced Spectroscopic Analysis of Organic Gunshot Residue and Explosives
… study could offer a more successful method for analysis. In addition, the methods developed herein for organic gunshot residue are also applied to the analysis and identification of explosive compounds.</p> <p>This research focused upon the use of Raman spectroscopy and surface enhanced Raman …
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Spectroscopic analysis and dynamics of ligand binding to bacterial oxidases
… with ligands, as determined by a variety of spectroscopic methods.
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Charge transport and spectroscopic analysis of high-mobility molecular semiconductors
… of this novel material. In the third chapter, spectroscopic studies of molecular semiconductor DNTT single crystals are explored. Here, for the first time, we demonstrate that under irradiation by a femtosecond laser pulse DNTT single crystals emit terahertz radiation, whose frequencies …
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A spectroscopic analysis of the eclipsing Nova-like EC21178-54
… period of 3.708 hours. High-speed photometric analysis of its light curve reveal that this system is a rich source of quasi-periodic oscillations (QPOs), dwarf nova oscillations (DNOs) and the other type of periodic oscillations called longer period dwarf nova oscillations (lpDNOs). Its light …
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Spectroscopic analysis and synthesis of nucleoside analogs for lethal mutagenesis
The high mutation rate of HIV makes treatment of HIV/AIDS difficult, as the virus can develop resistance to existing therapeutics. A novel antiviral nucleoside analog, 5-Aza-5,6-dihydro-2'- deoxycytidine (KP1212), employs the mechanism of lethal mutagenesis to avoid the problem of drug resistance …
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Predictive models in near-infrared spectroscopic analysis for blood hemoglobin prediction
… patient to be mixed with reagent chemicals for analysis. Alternatively, near-infrared spectroscopy (NIRS) technology can be used to measure blood hemoglobin level. NIRS is based on molecular overtone and combination vibrations produce absorption bands typically very broad, leading to complex …
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Laser produced vaporization of materials for use in mass spectroscopic analysis
The focused output of certain solid state lasers can be used to produce rapid surface heating and consequent vaporization in absorbing materials. For ordinary lasers it appears that the heating process can be adequately explained on the basis of a relatively simple classical thermodynamic …
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XPS and Carbon-13 NMR spectroscopic analysis of composite rocket propellants
… the propellant ageing process. In the XPS analysis, changes in the sources for the N(1s) and Cl(2p) photopeaks were investigated. The propellant loses "organic" nitrogen as it ages. Changes in the amount of Cl⁻ present are in doubt due to instrumental considerations. Carbon-13 NMR analysis …
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Electrochemical and spectroscopic analysis of collagen films and lipid bilayers on biomaterial surfaces
One crucial step towards biointegration of an implant material into the human body is the adsorption of proteins. This thesis aims at the development of a stable and relatively simple system to model the native protein film on a biomaterial surface under the influence of electric fields. Collagen …
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Study of Mechanical Properties of PVA Fiber-Reinforced Concrete With Raman Spectroscopic Analysis
<p>The brittleness of concrete has always been a safety and economic issue of great concern. The low tensile strength of concrete is the cause of its intrinsic brittle nature. This is critical considering the amount of concrete used for the construction of highways, buildings, and other facilities. …
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Absorption and fluorescence spectroscopic analysis using compact, linear variable filter based, detection platforms
Spectroscopic analysis is an integral part of biological and chemical sensing. However, most spectroscopic equipment is relegated to laboratories. Compact and portable alternatives to conventional spectroscopic tools allow for testing outside of laboratory settings. This is achieved by making the …
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Raman spectroscopic analysis of fatty acids in tumor micro- and macroenvironments in breast cancer
… These findings demonstrate the power of this spectroscopic analysis, and may provide new insights into the macroenvironmental regulations in breast cancer.
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Near-IR Spectroscopic Analysis of the Primary Volatile Composition of Long and Short-Period Comets
… This work presents the first comprehensive analysis of molecular production rates (molecules <sup>s−1</sup>) and abundances (production rates relative to H<sub>2</sub>O and C<sub>2</sub>H<sub>6</sub>) of a large set of primary volatiles, H<sub>2</sub>O, HCN, C<sub>2</sub>H<sub>2</sub>, …
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High-resolution NMR spectroscopic analysis of anticancer drugs, DNA and their interactions: 1. Platinum anticancer compounds - DNA interactions. 2. Anthracycline drugs - DNA interactions and modified DNA
Chemotherapy with anticancer drugs is one of the main method of cancer treatment. The exploitation of the stereochemical interactions between anticancer drugs and DNA is of great importance for the ultimate clinical advances of cancer chemotherapy, which needs the detailed structural knowledge of …
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