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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 172 for “"analytical technique"”.
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Considerations Involving the Use of Atomic Absorption Spectroscopy as a Quantitative Analytical Technique
Made available in DSpace on 2014-12-09T17:34:58Z (GMT). No. of bitstreams: 1 6500829.pdf: 4050111 bytes, checksum: c5b2ffaf5ab4836baa67d07faad71b2e (MD5) Previous issue date: 1964
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The Development of an Analytical Technique to Measure Stable and Radiogenic Strontium Isotope Ratios Using Thermal Ionization Mass Spectrometry with the Double Spike Method
An analytical method using a strontium “double spike” enriched in both 84Sr and 87Sr was developed to measure the n(87Sr)/n(86Sr) and n(88Sr)/n(86Sr) isotope ratios using a thermal ionization mass spectrometer. The results obtained for the SRM987 reference material using this technique are in …
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Metabolomic and metabolomic flux studies of the effects of sphingosine kinase inhibitors on prostate cancer cells using high-resolution mass spectrometry as an analytical technique
There is evidence of the involvement of sphingosine kinases (two isoforms termed SK1and SK2), which catalyse the formation of the bioactive lipid, sphingosine 1-phosphate(S1P), in various diseases including cancer. Over the last few years, metabolomics has become an increasingly critical part in …
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Liquid chromatography-mass spectrometry, an evolution in doping analysis
… was acquired with capillary GC-MS. This analytical technique is only suitable for volatile compounds. Because doping agents include polar functional groups in their structure, their volatility is limited and prior to GC-MS analysis, derivatisation is required for most of them. …
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Analysis of urinary calculi by attenuated total reflection with atlas
… a simple, precise and reproducible routine analytical technique by using attenuated total reflectance, and (2) to serve as an atlas for identification of renal calculi.
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Microstructure and Microchemistry of Titanium-Carbide Coated Cemented Carbides
… performed using a variety of contemporary micro-analytical techniques: Auger Electron Spectroscopy, STEM X-ray microchemical analysis and electron energy loss spectroscopy. As most of the analytical technique
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Investigations of Chiral Recognition Processes
Use of the aforementioned CSP in a promising new analytical technique, capillary electrochromatography (CEC), was also investigated. The chiral selector was bonded to silica support (3 mum, 100 A pore size), packed into capillaries (100 mum i.d.), and evaluated under different conditions to …
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Development and Validation of Laser-Induced Breakdown Spectroscopy Methods for the Analysis of Aqueous Solutions
… breakdown spectroscopy (LIBS) is an analytical technique that uses the focused energy of a pulsed laser as a sampling and excitation source for atomic emission spectroscopy (AES). LIBS has some distinct advantages over traditional AES methods: ability to analyze any phase of matter, …
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An analytical and experimental investigation of three phase flow in airlift pumps used for diamondiferous marine gravel reclamation
… The purpose of the research was to develop an analytical technique to simulate mathematically an offshore airlift pump being used in the recovery of diamondiferous marine gravels. This analytical technique is incorporated into computer software which can be used to simulate prototype airlift …
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A comprehensive chemical examination of methylamphetamine produced from pseudoephedrine extracted from cold medication
… of samples were prepared and analysed by each analytical technique to provide a robust sample set for data interpretation. Organic impurity analysis was undertaken using a developed and validated GCMS impurity profiling method. The GCMS method discriminated the samples by synthetic route based …
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Formulation of electrophoretic module for integration onto silicon-on-insulator neural probes
Capillary electrophoresis (CE) has become a key analytical technique, especially in neurochemistry, due to its high separation efficiency and ability to analyze complex mixtures at a small scale [1]. However, challenges remain when it comes to scaling CE systems to match the demands of specific …
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The constrained blister - a nearly constant strain energy release rate test for adhesives
… of three parts; (1) development of the testing technique to evaluate strain energy release rate and to record the time dependent nature of the fracture process, (2) numerical analysis of the constrained blister test to determine the applicability of an approximate solution for several materials, …
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Modeling ultrasonic transducer in homogeneous and non-homogeneous media using DPSM method
… element with flat or curved front face. Analytically modeling the fields radiated by ultrasonic transducers is a very difficult task because of the large number of possible transducer types, sizes and configurations that are used in practice. In this study, a semi analytical technique the …
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Application of Chemiluminescent Detection to a Capillary Electrophoresis System Contained on a Glass Slide and the Development of Non-Flowing Electrogenerated Chemiluminescence Probes
… been constructed and demonstrated as a feasible analytical technique. A simple method which does not require highly specialized facilities to manufacture these planar devices has concurrently been developed. This separation and detection system was characterized by separating and detecting …
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The development of surface NMR-electrochemistry: A new in situ analytical probe to examine electrochemical interfaces
… has the capability of becoming a viable analytical technique in surface and solid-state electrochemistry. Using this method, carbon monoxide obtained from the decomposition of methanol was found to be bonded to a polycrystalline platinum electrode through linear and bridge configurations. …
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Prediction of snap-through instability under harmonic excitation
… system. The harmonic balance method is the analytical technique used in solving the nonlinear ordinary differential equations. In comparison with the approximate analytical solutions, numerical approaches are implemented.
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Hydro-pneumatic conveying of liquid by means of an airlift pump
… are investigated with a view to establishing an analytical technique to aid in theoretically modelling air-lift pump behaviour. Extensive work on two test facilities constructed at the University of Cape Town's Hydrotransport Research facility has been done. Various components needed for the …
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Photochemical Reaction Products of Polycyclic Aromatic Hydrocarbons Adsorbed at an Air-Water Interface
… challenging analysis of these mixtures, a novel analytical technique based on high performance liquid chromatography (HPLC) coupled to UV diode-array detection and dopant-assisted atmospheric pressure photoionization mass spectrometry (APPI-MS) was developed, including the optimization of the …
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Desarrollo de métodos de caracterización de activadores en incendios
… in fire investigations. The most widely used analytical technique for the analysis of accelerants is GC-MS. Although GCMS has proven to be useful in this field, it requires long analysis times and it cannot be applied as a screening technique or for rapid quantitative analysis. Furthermore, …
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Development of a plasma source ion implantation facility for the modification of materials' surfaces
… Assisted Materials Modification Laboratory, the analytical tools available at the Materials Research Group and surrounding universities, basic research into the implantation of steels, the x-rays emitted as a side-effect of plasma source ion implantation and the development of an analytical …
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