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.
Results
Showing 1 to 20 of 40 for “"chemical interaction"”.
-
Investigating Physical and Chemical Interaction of Aspergillus terreus Spores for Changes in Morphology and Physiology
… densities reach a certain threshold, signalling chemicals secreted into the environment effect expression of specific genes leading to a range of physiological responses. Secondly, due to physical spore-to-spore contact, communication may develop that could trigger a physical response, altering …
-
Compatibility and stability of 8% amino acids solution in combination with electrolytes, vitamins and antibiotics
… suggested, in fact, there may have been chemical interaction of Solu B Forte and MVI once admixed with the amino acids/dextrose solution. Yet, results of thin-layer chromatography did not appear to substantiate chemical interaction between MVI and the amino acids solution. The …
-
Design of Novel High Temperature Thermosetting Resins Tailored to Specific Needs
… mechanical interlocking effect and stronger chemical interaction at the interface. Failure mechanism of Zn-coated Cu foil with ATSP was both cohesive and adhesive. Only adhesive failure occurred at the ATSP/Cu and ATSP/Ni interface.
-
Green tea antioxidants inhibition of oxidation and mutation
… can destroy the oxidants. Based on a simple chemical interaction of peroxynitrite (OONO-) and luminol, blue light is produced upon oxidation. It was shown that green tea and constituents have light inhibitory capabilities. In order to show the possible beneficial effects of green tea with …
-
Optimización de bioensayos alelopaticos: aplicación en la búsqueda de herbicidas naturales
… conceptual framework of ecology in general and chemical ecology in particular, Mr. Diego Castellano Sanchez explains in detail the definition of allelopathy. He then focuses on applied potential of this recent field of ecology, and demonstrates how it can provide tools for sustainable …
-
The synthesis of inorganic semiconductor nanocrystalline materials for the purpose of creating hybrid organic/inorganic light-emitting devices
… purified and manipulated in solution and their chemical interaction with the environment is the same for all sizes and can be modified using chemical techniques. These unique properties make semiconductor NCs ideal for use in light emitting devices (QD-LEDs). This work shows how …
-
Modelling of thermo-mechanical and irradiation behavior of metallic and oxide fuels for sodium fast reactors
… (3) Temperature Distribution, (4) Fuel Clad Chemical Interaction, (5) Fuel and Clad Mechanical Analysis and (6) Transient Creep- Fracture Model for the clad. Given the fuel pin geometry, composition and irradiation history, FEAST can analyze fuel and cladding thermo-mechanical behavior at …
-
Influence of solution ionic strength on aggregation of novel water soluble phosphines and two phase catalysis
The preparation of new water soluble phosphines for organometallic chemistry and catalysis in water is important to the development of environmentally benign homogeneous catalysts. A series of steric demanding surface active phosphines have been synthesized and fully characterized. Two phase …
-
Friction stir welding of high temperature alloys
… degradation can be attributed to mechanical and chemical interaction with processed material. The nature of tool-workpiece interaction was tool material dependent and influenced the resultant microstructure and weld quality in the stirred zone.</p> <p>FSW resulted in refined grain structure in …
-
Development of synthetic fiber-based reinforcements for thermoplastics as alternative to steel-based analogs for industrial applications
… between the fibers and the TPU matrix caused by chemical interaction and enhanced interlocking. Experimental results from phase 2 revealed that the injection molding process parameter related to temperature was the most significant process control variable compared to the injection pressure and …
-
Thermal-hydraulic analysis of innovative fuel configurations for the sodium fast reactor
… density of the fuel is limited by fuel-clad chemical interaction (FCCI) for metallic fuel, cladding thermal and irradiation strain, the fuel melting point, sodium boiling, and to a lesser extent the sodium pressure drop in the fuel channels. Therefore, innovative fuel configurations that …
-
Re-evaluation of Kombat-style mineralisation and implications for exploration in the Otavi mountainland, Namibia
… carbonate host rocks due to structural traps and chemical interaction. The syn-sedimentary Fe-Mn ore, which is largely associated with calc-silicate lithologies, consists mainly of magnetite and hematite with minor pyrite, hausmannite and jacobsite, was deposited by diagenetic and hydrogenetic …
-
Surface -enhanced Raman spectroscopic studies of organonitriles on copper colloids
… enhancement is primarily influenced by the chemical interaction between the adsorbate and the metal surface. Although the molecular symmetry of the adsorbate, as well as the affects of aggregation, affect the degree of enhancement observed, the chemical adsorption onto the metal dominates …
-
Growth and chemical characterisation studies of Mn silicate barrier layers on SiO2 and CDO
… this diffusion barrier layer resulting from the chemical interaction of deposited Mn with the insulating substrate has potential application in future generations of copper interconnect technologies as they are significantly thinner than the conventional deposited barrier layers. The principle …
-
Adhesion/Diffusion Barrier Layers for Copper Integration: Carbon-Silicon Polymer Films and Tantalum Substrates
… A fundamental understanding of the chemical interaction of Cu with various substrates, including diffusion barriers and adhesion promoters, is essential to achieve this goal. The objective of this research is to develop novel organic polymers as Cu/low-k interfacial layers and to …
-
Identifying vaping hazards through the evaluation of exposure methods and cell culture models for e-liquid mixtures.
… a result, steps have been made to identify the chemicals in e liquids that induce toxicity. Due to the complexity of e-cigarettes, there is a continued need to implement interdisciplinary approaches for hazard identification of vaping toxicity, namely the evaluation of exposure methods and in …
-
The Interaction of Nitric Oxide and Carbon Monoxide With Platinum
The dissertation considers several aspects of the interactions of nitric oxide and carbon monoxide with platinum, and each other. A model based on the conservation of orbital symmetry and a simplified picture of the surface's band structure is presented. The model successfully explains the plane to …
-
Photoemission spectroscopy of germanium surfaces, interfaces, and germanium-silicon systems
… were determined, including the growth mechanism, chemical interaction, crystallographic relationships, and electronic properties. Ag was found to grow by submonolayer nucleation into metallic Ag(110) islands followed by three-dimensional growth. Photoemission spectroscopy from the Ge 3d core …
-
Microstructural Development and Superconducting Parameters of the YBa2Cu3O7-delta Coated Conductor
… using intermediate buffer layers to prevent chemical interaction. In order for the superconductor to be capable of carrying a high current density, its grains must have good crystallographic alignment in order to avoid the presence of high angle grain boundaries. This can be ensured by …
-
The Impact of soil structure and confining stress on the permeability of clay soils in brine environments
… macrofabric of the clays as a result of physico-chemical interactions between the clay particles and pore fluid chemistry. However at the present there still remains no theoretical framework for interpreting the mechanism for changing permeability and the prediction of the onset of permeability …
Page 1 of 2