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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 20 of 44 for “"microwave radiation"”.
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The effect of microwave radiation on mineral processing
… process may be attributed to comminution. Microwave pre-treatment has been suggested as a means to decrease the energy requirements. A variety of mineral ores have been investigated and the effects of microwave radiation quantified in terms of the mineralogy, changes in the Bond Work Index, …
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Emission and absorption of microwave radiation by interstellar OH.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1967. Ph.D.
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The Effects of Microwave Radiation on the Infectivity of Trichinella Spiralis
The problem: The effects of microwave radiation on the infectivity of "Trichinella spiralis" in young, white, laboratory mice were studied. Procedure. Mice were divided into two groups: 1) mice receiving isolated, irradiated larvae and 2) mice receiving larvae which were isolated from irradiated …
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Friedel-crafts acylation reactions using heterogeneous catalysts stimulated by microwave radiation
… ki mol' and those for anisole 67-196 kJ mor 1 . Microwave experiments were performed in both batch and flow reactors. Under both reactor configurations microwave stimulation gave consistent increases in catalyst activity. Attempts were made to correlate this with the material dielectric …
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Generation of coherent high-power microwave radiation with relativisitic electron beams
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
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On the Dynamics of Single-Electron Tunneling in Semiconductor Quantum Dots under Microwave Radiation
… dots are studied using both transport and microwave spectroscopy. In transport spectroscopy, SET is monitored by measuring the direct tunnel current through the quantum dots in both the linear and nonlinear transport regimes, where ground states and excited states of the quantum dots are …
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Generation of intense microwave radiation by the relativistic e-beam magnetron (experiment and numerical simulation)
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1980.
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An investigation into the fluorination capabilities of ammonium acid fluoride under microwave radiation with respect to zircon
… of this study was to investigate the use of microwave digestion as an alternative process, and to determine the parameters for this technique for the digestion of zircon with ammonium acid fluoride (AAF) under various conditions. Ammonium acid fluoride is more convenient and safer to use than …
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Exploratory studies in the use of microwave radiation to assist the extraction of pollutants from various matrices.
The microwave assisted extraction of organic contaminants from heterogeneous environmental solids was investigated. The mechanisms for the interaction of a microwave field with matter, and the basic equipment used in microwave processing are presented. It was found that water content is the most …
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Investigation of the heating and curing rate of polymeric materials with thermal energy, continuous and pulsed microwave radiation
… rate of polymers with continuous and pulsed microwave radiation and compare with conventional thermal energy. The heating rate of poly(ethylene glycol) and poly(propylene glycol) has been studied as a function of molecular weight with pulsed as well as continuous microwave radiation, at …
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Optimizing Weed Management via Microwave Irradiation
… to chemical weed control is the use of microwave radiation, a particular form of indirect thermal weeding. Absorption of microwave radiation causes water molecules within the tissue to oscillate, thereby converting electromagnetic energy into heat. This technique is rapid, versatile and …
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Microwave effects on some zeolite catalysed reactions
… the literature which refers to the advantages of microwave irradiation as opposed to normal conventional heating. Many of the reports claim that activation by microwave radiation results in enhanced rates and changes in product selectivities. Of special interest were reports that microwave …
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Enhanced Microwave Hyperthermia using Nanoparticles
… method in cancer treatment, and high frequency microwave radiation has been used successfully to raise the tumor temperature to around 42°C in superficial tumors without causing damage to surrounding healthy tissues. Magnetic fluid hyperthermia involves the use of magnetic nanoparticles …
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Development of biodegradable implants for sustained drug delivery
… when designing a new implantable device. Gamma radiation, microwave radiation and ultraviolet light were investigated as potential sterilisation methods for polymeric implants. Microwave radiation proved to be an ineffective sterilisation method. However, gamma radiation and ultraviolet light …
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Cryogenic surface electrode ion traps with integrated superconducting microwave resonators for polar molecular ion spectroscopy
… polar molecular ions' rotational states to the microwave radiation. The new approach presented here is based on co-trapping Sr+ atomic ions together with SrCl+ molecular ions in a cryogenic surface electrode RF ion trap and on using the coupling of the molecular ion's rotational states to an …
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Dielectric properties of polymers at microwave frequencies
… technique. With the ability to use microwave radiation for curing of polymer systems, the measurement of the dielectric properties at microwave frequencies is vital. The two polymer systems that have been investigated in this work are the epoxide system of EPON 828/ 4,4' DDS …
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Design, implementation and control of microwave plasma gasification system for syngas production
… It applies the newest technologies of microwave plasma on a traditional method known as gasification. The simulation of this system has been achieved through a high frequency structure simulator to decide the best design of the structure. Microwave radiation at the frequency of 2.45 GHz …
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Investigation of the interaction of high current relativistic electron beams with electromagnetic fields
… addition, the production of high power ( ~100kW) microwave radiation through the interaction of such beams with the natural modes of a resonant cavity is reported. A Marx bank generator was used to excite a hollow cylindrical cathode stalk producing diode currents of the order of 1 kA. A fraction …
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Large amplitude driving of a persistent current qubit
… current qubit in the presence of large amplitude microwave radiation is studied. Three main results are presented in this work. A new coherent quasi classical regime has been observed, where coherent quantum dynamics persist even while transitions between energy levels are caused by many photon …
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Microwave assisted decomposition of Tri-butyl phosphate in aqueous effluent-streams
An investigation into the microwave assisted remediation of organic containing aqueous solutions has been conducted. Tri-n-butyl phosphate (TBP), the nuclear thel reprocessing solvent, and its diluents, are known to be responsible for the formation of interfacial deposits (cruds) in the alkali …
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