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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 28 for “"Group 13"”.
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Group 3 and Group 13 Metal Hydride Compounds
… this thesis was to synthesize (and characterize) group 3 and group 13 metal alkyl and hydride complexes. These complexes were supported by aminopyridinato, guanidinato and phenolato ligands. Guanidinato ligand stabilized aluminum alkyl complexes were synthesized through alkane elimination. …
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The synthesis of kinetically stabilised heavy group 13 hydride complexes
… hydrido and low oxidation state complexes of the group 13 elements. The underlying theme is the stabilisation of these species. The work upon this subject is divided into eight chapters. Chapter One provides a general introduction to the members of group 13, with particular emphasis on the …
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Preparation and Investigation of Group 13 Metal Organo-Phosphate Hybrid-Framework Materials
… can be linked or modified by functional organic groups to make materials with specific architectures and thus specific properties. The objective is to reach an understanding of how the organic and inorganic pieces fit together to allow for the preparation of tailor-made materials with specific …
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Zirconium-group 13 heterobinmetallic compounds and the synthesis of oxysulfides in sodium polysulfide
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1996.
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Synthesis, Characterization, and Applications of Group 13 and 14 Complexes of Chelating Formazanate Ligands
… describes the synthesis and characterization of group 13 (boron and aluminum) and group 14 (silicon, germanium, and tin) complexes supported by chelating formazanate [R1-N-N=C(R3)-N=N-R5]‒ ligands. The resulting complexes are redox-active and often luminescent. Chapters two to four describe the …
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Development of Main Group Systems for Small Molecules Activation
… we showed compounds contain covalently bonded group 13 and 15 elements remain reactive towards CO2 activation. For example, indium amide systems (R2In-NR’2) are shown to readily activate CO2 and has been developed as catalysts for the synthesis of 1,3-disubstituted ureas.
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Modelling of Structure-Property Relationships in Perovskites
… thallium compounds. Finally, gallium, another group 13 element, was investigated as a 2-dimensional nanomaterial. The robust metallicity of this material was demonstrated by density functional calculations, including simulation of lattice strain.
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Tris-Pyridyl Ligands and Beyond: Modifications Derived from the Bridgehead and Donor Vector
… 4-pyridyl based ligands E(py)3 (where E = a main group bridgehead atom or group, and py = a pyridyl donor arm) is presented. The main conclusion from this survey of the literature is that, despite recent developments in this area, there are some significantly unexplored fields. This is …
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Avian population densities, habitat use, and foraging ecology in thinned and unthinned hardwood forests in Southwestern Virginia
… thinning. Habitat use similarities were used to group 13 bird species into three categories: (1) shrub/conifer species included the tufted titmouse, blue-gray gnatcatcher, wood thrush, ovenbird, and hooded warbler, (2) generalist species included the eastern wood-pewee, red-eyed vireo, …
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Synthesis, structures, electronic structures and physical properties of quaternary alkali, alkaline earth, rare earth and transition metal pnictides
… alkaline-earth, rare earth, transition metals, group 13 and 15 elements. By using powder and single crystal X-ray diffractions, the compositions and crystal structures of these phases could be determined. The electronic structures were also calculated from tight-bonding linear-muffin-tin-orbital …
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Econometric analysis of youth tobacco use: evidence from Lesotho global youth tobacco surveys
… followed by other smoked tobacco products (13.94%), and, lastly, by cigarettes (12.24%). The results further reveal that the determinants of smoking vary with the tobacco product type and gender. Cigarette smoking has a strong positive association with peer influence and the availability of …
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A Retrospective Audit Of Biojet® Prostate Fusion Biopsies Amongst Patients Seen In A High-Volume Private Referral Centre In Cape Town Between January 2017 And April 2020
… Biopsy Studies (START) of the Prostate group and anonymously entered onto a Redcap database. Results: The median age of the patient population was 64 (SD 9.124) years. The median PSA level was 6.5 ng/ml (IQR- 4.7). Most patients (78/135) had a clinical stage of T1c (57%). In the biopsy …
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Development of magnesium aluminate and gallate chemistry incentivised by potential in rechargeable battery technology
… the synthesis and characterization of analogous group 13 gallate complexes was successfully carried out.
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Type II diabetes mellitus and cardiovascular markers in humans: a prospective study in hellenic homogeneous population
… factors in a selection of different age groups of diabetic patients was studied. The purpose of the present work was the identification of biochemical parameters in plasma, which may serve as predisposition factors to CVD in T2DM patients of different age. The variability of …
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Risk factors and spatial distribution of urinary schistomiasis among school going children in Ng'ombe township of Lusaka
… Primary School (33.3%). The members of age group 10 -12 years were two times more likely to be infected with Schistosomiasis (OR 2.18, 95% CI 1.10 – 4.40: P=0.028) compared to age group 6 -9 years while age group 13 – 15 years were four times more likely to be infected with Schistosomiasis …
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Risk factors and spatial distribution of urinary schistomiasis among school going children in Ng'ombe township of Lusaka
… Primary School (33.3%). The members of age group 10 -12 years were two times more likely to be infected with Schistosomiasis (OR 2.18, 95% CI 1.10 – 4.40: P=0.028) compared to age group 6 -9 years while age group 13 – 15 years were four times more likely to be infected with Schistosomiasis …
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Exploring the Synthesis, Structure, and Reactivity of Phosphorus-Chalcogen Heterocycles
In recent years, the field of low-coordinate main group chemistry has seen significant research interest due to their unique structures and unprecedented reactivity. Conversely, the area of phosphinidene chalcogenides, a low-coordinate phosphorus and chalcogen species, have yet to be thoroughly …
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ASPECTS OF THE MICROPALAEONTOLOGY AND STRATIGRAPHY OF CRETACEOUS SHELF CARBONATES FROM THE OMAN MOUNTAINS
… and Jebel Salak), exposing Thamama and Wasia Group sediments were sedimentologically logged and sampled. Thin sections of each of the Thamama Group samples were prepared for micropalaeontological and microfacies analysis. The foraminifera, calcareous algae and calpionellids in each sample were …
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Development of a Communication Tool to Support the Preschool Interior Design Process
… used to gather the data for the study. A focus group was conducted to ascertain general information from child development professionals, design professionals, and parents about their opinions and perceptions of the design process as a result of their personal experiences. Following the focus …
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