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Now showing items 1-20 of 39
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Vacuum polarization energy of a soliton with many internal degrees of freedom
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The main objective of this thesis is to numerically compute the vacuum polarization energy (VPE) of solitons in a multi-component model by means of spectral methods. The VPE is the leading quantum ... -
Understanding Southern Ocean phytoplankton ecophysiological response to iron availability
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Over the past century, climate change has been of growing concern, due to its ecological and economic global impact. The Southern Ocean buffers the impacts of climate change by accounting for a significant ... -
Trophic interactions of the Guttural Toad (Sclerophrys gutturalis, Power 1927) along an invasion gradient
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Invasive amphibians have caused widespread negative ecological and socio- economic impacts globally, yet most of the research investigating this topic is focused on a small handful of species. The ... -
Synthesis and characterization of fluorous-stabilized metal nanoparticles for evaluation in fluorous biphasic catalysis
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: A fluorous biphasic approach as a green strategy for the facile recycling and re-use of expensive catalysts, has been probed. A series of fluorous-stabilized Au NPs were successfully synthesized using ... -
Structure-activity and mechanistic investigations into the cytotoxicity of flavonols in cancer cells
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Flavonols belong to a group of polyphenolic compounds that are found in medicinal and edible plants. They have a broad range of medicinal properties including anti-cancer properties, being able to ... -
Solid-state interactions of materials: Applications-based solid-state NMR spectroscopy
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The solid-state interactions of various polymeric materials were investigated in this study to determine how these interactions affect the macroscopic properties of the solid. The work presented in this ... -
Solid-liquid separation of xylene isomers using metallocycles
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Host-guest chemistry is an important concept in supramolecular chemistry. Porous hosts may be able to selectively accommodate guests, making them attractive candidates for potential applications such ... -
Schiff-base Ni nanoparticles as catalysts in olefin polymerization reactions
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Since the 1960’s, the application of discrete Schiff-base nickel complexes has been used in the catalytic polymerization and oligomerization of various olefinic monomers with great success. To promote ... -
The role of Serum Amyloid A in NLRP3 inflammasome signalling in breast and colon cancer
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Introduction: Cancer is a complex disease with multiple interactions targeting the organism on cellular, tissue and systemic levels. The main research focus for the past decades has been on the genome ... -
Radiation shielding design for sealed radioactive gamma-ray and neutron sources: measurements and modeling
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Adequacy of the radiation shielding implemented for sealed radioactive sources used at the University was evaluated and improved. Three different setups were investi- gated; 1. neutron activation drum, ... -
Quantum optical modelling and experiments investigating the population evolution in atomic zinc and ytterbium-171 ions
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: This project sets out to derive, adapt and apply the four state optical Bloch equations to two very different experimental scenarios which are studied in our research group. These include modelling the ... -
Quantum computing on cloud-based processors
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The noisy intermediate-scale quantum (NISQ) era refers to the current technological epoch permeated with quantum processors that are big enough (50-100 qubits) to be no longer trivially simulatable with ... -
Profiling of the secondary metabolites and the characterization two novel antilisterial peptides, xenopep and rhabdin, produced by xenorhabdus khoisanae
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: In the early 1900’s the discovery of sulfonamides and penicillin paved the way for antibiotics and led to a boom in the discovery of other antibiotics. Unfortunately, this boom was short lived and soon ... -
Producing organic acids from pomace wastes – a biorefinery concept
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH SUMMARY: The production of energy and valuable products via petroleum refineries could be partially replaced by biorefineries that are utilising renewable biomass as substrate. For example, an important metabolite ... -
Polymer-coated magnetic nanoparticles and polymer nanoparticles for the treatment of Mycobacterium tuberculosis (Mtb)
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Tuberculosis (TB) can be classified as a neglected disease where an estimated one fourth of the world’s population could be infected with Mycobacterium tuberculosis (Mtb) in the form of latent TB. ... -
Motor protein transport on cytoskeleton networks
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Motor proteins are able to propel themselves along the, sometimes branched and intersecting, directed filaments of the cytoskeleton, dragging various organelles and vesicles to their required destinations ... -
Molecular regulation of autophagy and metastasis in breast cancer: new insights into the role of serum amyloid A
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Introduction: Cytokines, growth factors and acute phase proteins present in the tumour microenvironment regulate inflammatory responses and alter crosstalk between various signalling pathways involved ... -
Modelling the dispersion and deposition of solid wastes from fish farming with a continuum approach
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The sustainability of the environment in coastal ecosystems is of great concern due to aquaculture. There are many unknowns and constraints in the predictive modelling of fish farm waste due to the ... -
Microfossil characterisation for petroleum exploration using x-ray computed tomography: a new approach
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: The current bulk processing and identification of microfossils from drill cores for petroleum exploration are limited by time-consuming traditional chemical and physical microfossil extraction and ... -
Mantle and crust interaction in post-collisional setting, a case study of lamprophyric-granitic composite dykes of northern Aigoual pluton, French Massif Central
(Stellenbosch : Stellenbosch University, 2022-04)ENGLISH ABSTRACT: Lamprophyre to granite composite dykes in the northern extremity of the post-Variscan Aigoual pluton, French Massif Central (FMC), offer an opportunity to study the complexity of the processes that ...
