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 13 of 13 for “"precipitation methods"”.
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Complexation between cyclodextrins and phenylurea herbicides in solution and in the solid state
… monuron and fenuron) using the kneading and co-precipitation methods in the solid state while also determining complex formation of the same phenylureas in solution with selected cyclodextrins. The kneading experiments were carried out first to determine whether the phenylureas would complex in …
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Some non-cellulosic b-D-Glycans from plant sources
… and purified using standard fractionation methods including chromatographic techniques and selective precipitation methods. Structural information was obtained by employing techniques such as methylation analysis (involving use of gas liquid chromatography mass spectrometry), optical …
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Preparation of Copper-Based Oxygen Carrier Supported on Titanium Dioxide
… In this study, modified wet impregnation and co-precipitation methods have been developed. The active ingredient is copper(II) oxide, and the supporting material is either directly from titanium(IV) oxide (anatase 99%) or that prepared from other titanium resources such as titanium tetrachloride …
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Discovery and dissemination of new knowledge in food science: Analytical methods for quantification of polyphenols and amino acids in fruits and the use of mobile phone-based instructional technology in food science education
… our understanding of fruit chemistry, analytical methods were compared and applied. Polyphenols are secondary metabolites in fruits of particular importance in food science, as they contribute to the sensory attributes and health benefits of the products. Evaluation of common analytical methods …
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Precipitation techniques and characterisation of rare earth element doped phosphor materials
… first aim was to study the use of a number of precipitation methods to control the size and morphology of precursor phosphor materials for potential applications in a new generation of high definition and field emission displays. The morphological and luminescent characteristics of these …
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Carbon Monoxide Oxidation on Nanoparticle Catalysts and Gas Phase Reactions of Small Molecules and Volatile Organics with Metal Cations
… by physical (LVCC) and chemical (deposition-precipitation)methods, it was found that the catalytic activity is higher for Au/CeO2 prepared by the deposition-precipitation method.The effect of alloying Au and Cu nanoparticles on the catalytic activity for low temperature CO oxidation was also …
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Production of a soluble hydrogenase from R. Eutropha H16
… the cell ultrasonication and ammonium sulphate precipitation methods followed by two consecutive ion exchange steps and a final size exclusion chromatography step to recover functional SH. As a result of this purification scheme developed, a pure active SH preparation thatexhibits a specific …
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Continuous synthesis of iron and aluminium-based nanoparticles
… synthesis of iron oxide nanoparticles through precipitation methods is examined. A strategy integrating the synthesis and functionalization of iron oxide nanoparticles into a single green process and set-up is developed, enabling the low cost, reproducible, large scale production of …
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Magnesium doped hydroxyapatite/sodium alginate biocomposite for bone implants application
… alginate was successfully prepared by using precipitation method and this research was implement to enhance the physical, mechanical and biological properties of HA/SA. The properties of this materials are attributed to more cost-efficient, eco-friendly and maintaining the features required …
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The supramolecular derivatisation of pharmaceutically relevant compounds via co-crystallization and cyclodextrin inclusion complexation
… (PTB), were isolated using kneading and/or co-precipitation methods, and analysed using thermal analysis, powder X-ray diffraction and 1H NMR analytical techniques. The CD inclusion complexes (with host-guest stoichiometries in parentheses) included -CD·BES (2:1), - CD·BES (1:1), dimethylated …
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Developing new techniques to synthesize layered cathode materials for lithium-ion batteries
Many synthesis techniques like sol-gel, co-precipitation, hydrothermal, pyrolysis, and many more have been used to synthesize batteries' active electrode materials. High surface area cathode materials with smaller nanoparticles are favored for their higher reactivity compared to materials with …
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Preformulation solid-state supramolecular beneficiation of selected active pharmaceutical ingredients and a novel drug candidate
… thesis is based was to make use of contemporary methods in the field of supramolecular chemistry to improve the suboptimal physicochemical properties of selected compounds for use in the formulation of pharmaceutical products. The compounds selected were: Clevudine, an established drug that is …