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 69 for “"Metal Species"”.
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Steric aspects of the interaction of metal species with nucleic acid constituents
… of steric effects in the interaction of metal species with biomolecules has been addressed. More specifically, a focus has been placed on the interaction of platinum complexes with nucleoconstituents. Steric effects thus characterised have been related to the biological properties of such …
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SELECTIVE ADSORPTION OF DIBENZOTHIOPHENES ON ACTIVATED CARBONS WITH METAL SPECIES DEPOSITED ON THEIR SURFACES
… chemistry, material composition and effects of metals oncarbon adsorbents in desulfurization of liquid fuels. Materials are derived from poly (4-styrenesulfonic acid-co-maleic acid) salts (sodium or transition metals). They are investigated in a dynamic breakthrough process using model diesel …
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Complexing Carbon Nanomaterials and Reactive Metal Species for Selective Chemical Sensing and Tunable Catalysis
… carbon nanomaterials with reactive metal species for applications in chemical sensing and electrocatalysis. In Chapter 1, we begin with an introduction of chemiresistive sensing using functionalized carbon nanotubes (CNTs). This introduction summarizes the design, fabrication, …
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Interaction of gold mine taillings leachates with soil and geochemical partitioning of toxic metal species
Department of Ecology and Resource Management
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An Analytical Approach to the Investigation of the Interaction of Toxic Trace Metal Species With Biological Membranes
Made available in DSpace on 2014-12-13T20:09:37Z (GMT). No. of bitstreams: 1 7606787.pdf: 8842004 bytes, checksum: 1c1125c88c2c05ab070ecd59d45b9b44 (MD5) Previous issue date: 1975
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Fabrication of Biomass-Polymeric Adsorbent for the Removal of Selected Metal Species, Nutrients and Pathogens in Aqueous Solutions
… Water pollution is mainly caused by chemical species such as chromium and cadmium; nutrients (nitrates and phosphates) and pathogens from natural and anthropogenic activities which cause health problems and in some cases death to both human and aquatic organisms. South Africa is a water-scarce …
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Development of HPLC Techniques for the Analysis of Trace Metal Species in the Primary Coolant of a Pressurised Water Reactor
… s discussed. A review of trace and ultra-trace metal analysis, relevant to the specific requirements imposed by primary coolant chemistry, indicated that high performance liquid chromatography (HPLC), coupled with preconcentration of sample was an ideal technique. A HPLC system was developed to …
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Part I. A New Evaluation of Platt's Model, With Application to Metal Carbonyl Hydrides. Part Ii. Spectroscopic Studies of Hexachloro Transition Metal Species
Made available in DSpace on 2014-12-09T17:36:37Z (GMT). No. of bitstreams: 1 7013410.pdf: 2593104 bytes, checksum: 9794d86e4d83e971c07f327094084391 (MD5) Previous issue date: 1969
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Modeling Plasma Equipment and Feature Profile in Ionized Metal Physical Vapor Deposition
… line effects and irregular sputter tracks on species densities and fluxes. It was found that for typical conditions for Al IMPVD the metal species have improved symmetry due to charge exchange reactions and subsequent diffusion. The symmetry and uniformity of the metal species above the wafer …
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Impacts of microbial activity on trace metal behavior during the bioremediation of phenanthrene-contaminated soils
… (200 mg kg\(^{-1}\)) from soil containing both metals and phenanthrene, over 29 days. Bioremediation of phenanthrene and its effects on trace metal behaviour has been investigated. Metal behaviour studied includes metal speciation and the kinetics of exchange between solution and solid phase and …
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ΜΕΛΕΤΗ ΠΑΝΩ ΣΤΗΝ ΠΕΡΙΒΑΛΛΟΝΤΙΚΗ ΜΕΘΥΛΙΩΣΗ ΤΩΝ ΜΕΤΑΛΛΩΝ ΥΔΡΑΡΓΥΡΟΥ, ΚΑΣΙΤΕΡΟΥ ΚΑΙ ΜΟΛΥΒΔΟΥ ΣΕ ΥΔΑΤΙΚΑ ΟΙΚΟΣΥΣΤΗΜΑΤΑ
… UNDER WHICH THE TRANSPORT OF METHYL GROUPS TO METAL SPECIES, NAMELY HG, SN AND PB, IS TAKING PLACE INTHE ENVIRONMENT.
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Development of Main Group Systems for Small Molecules Activation
… been introduced as an alternative to transition metal catalyst. Since the first discovery in 2006, FLP has found diverse applications in areas such as small molecules activation and catalysis. The present thesis has two major directions: 1) find new types of FLP; 2) demonstrate their unusual …
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Environmental Applications of Ultrasound
… of the catalyst and chlorination of the surface metal species, respectively.
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Assessment of co-occurrence of cyanotoxins, toxic metals and anionic surfactants in irrigation water, agricultural soils and food crops
… of cyanotoxins, anionic surfactants and metal species in irrigation water, agricultural soils and food crops and determine the health risks associated with consuming cyanotoxins contaminated plants in the Crocodile (West) Marico Water Management Area, which covers parts of Gauteng and …
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Synthesis and Activation of Nanoscale Dendrimer-Derived Supported Noble Metal Catalysts
… as templates for the preparation of supported metal catalysts. This approach takes advantage of several unique characteristics of these dendrimers such as the ability to complex metal cations in solution and to protect them from aggregation until they are impregnated onto a support. After the …
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New Strategies and Transformations for the alpha-Functionalization of Amines to Access Chiral Amines
… then a migratory insertion process from metal-hydrides to 2-azadienes have been further developed. Of these processes, this thesis work will specifically focus on the research exploration of three synthons: 2-azaallyl anion, 2-azaaalyl radical and 2-azadiene. </p><p> We began …
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Synthesis and characterization of novel polyaniline/metal composites
… for the direct oxidation of aniline by these metal species and simultaneous formation of bulk quantities of PANI/Au and PANI/Pt composites, respectively. Studies of the PANI/Au composite indicate that the properties of the polymer are consistent with more traditional methods of preparation. …
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Pourbaix diagrams at elevated temperatures: a study of Zn and Sn
Metals in industrial settings such as power plants are often subjected to high temperature and pressure aqueous environments, where failure to control corrosion compromises worker and environment safety. For instance, zircaloy (1.2-1.7 wt.% Sn) fuel rods are exposed to aqueous 250-310 oC coolant in …
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NOVEL TYPES OF TWO-DIMENSIONAL METAL CARBIDES AND THEIR APPLICATIONS: FIRST PRINCIPLES STUDIES
Doping chemically active metal species into inert 2D carbon materials, such as graphene, graphyne, and graphdiyne, is widely adopted to design new functional structures. However, the doping-induced configurations generally suffer from poor stability, highly disordered lattices, and low metal …
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A developed metallomics method reveals the biochemical fate of Cd2+ and Hg species in erythrocyte lysate
… into the bioinorganic chemistry of non-essential metal species in the human body. To this end, a metallomics method was developed to probe the interaction of Cd2+, Hg2+, CH3Hg+ and thimerosal in the erythrocyte based on the direct analysis of erythrocyte lysate by size exclusion chromatography …
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