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Now showing items 1-20 of 52
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Vibrational spectroscopy for characterisation of a cyclic antimicrobial peptide
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: In order to understand antimicrobial peptide action towards membrane surfaces it is imperative to first understand the structure and conformational behaviour of the antimicrobial in solution environments ... -
Using stable isotopes to understand relative contributions of evaporation and evapotranspiration on groundwater recharge in the Verlorenvlei catchment, west coast, South Africa
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: In Southern Africa, especially in arid and semi-arid regions, there has been an increase in dependency on groundwater resources for both domestic and agricultural supplies. This has been ... -
Universal scaling and dynamics at quantum phase transitions in the Kitaev Chain
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Experimental advances in ultracold gases present physicists with the opportunity to explore a diverse range of new phenomena in a controllable manner. In turn, this has fuelled significant interest in ... -
Trichoderma as a functional fungal group in the rhizosphere of maize and wheat under conservation and conventional agricultural practices
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The contribution of agriculture in South Africa to the economy, is one of those major drivers of employment in South Africa. The two most produced commercial crops in SA are maize and wheat. In chapter ... -
Structure-property relationship of bimodal high density polyethylene: Effect on rheology
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Bimodal polyethylene is a version of HDPE that is tailor-made to possess better processability and mechanical strength. Polymerisation is carried out in a low-pressure dual reactor system in the presence ... -
Structure property relationships in bimodal HDPEs
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: By explicitly tailoring the microstructure of a polymer, it is possible to obtain more desirable properties for the intended product application, in addition to ensuring suitability for the required ... -
The Structure of 33Si,35S and the magicity of the N = 20 gap at Z = 14; 16
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Nuclei along N = 20 provide an excellent region to investigate nuclear structure and interactions, with their evolution from the doubly magic nucleus 40Ca through the Z = 16 and Z = 14 nuclei 36S and ... -
Spatial reproductive separation in a handed flower: variation across space and time
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: In many angiosperms, pollinator-driven selection has led to adaptive radiation, spe- cialisation and phenotypic variation over space and time. Most specialised floral adaptations function ... -
Southern African dust characteristics and potential impacts on the surrounding oceans
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: This study supports understanding the potential impact of dust aerosols from southern Africa have on the proximal ocean ecosystems. Dust can release essential nutrients and thus fertilize the ocean, ... -
Small extracellular vesicle dynamics and microRNA cargo in response to gradient specific high intensity running
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Skeletal muscle adaptation in response to exercise is a highly dynamic process and small extracellular vesicles (EVs) (30-150 nm) are postulated to be mediators of intercellular communication during ... -
Set-based particle swarm optimization for portfolio optimization
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Portfolio optimization is a complex problem, not only in the depth of the topics it covers but also in breadth. It is the process of determining which assets to include in a portfolio while simultaneously ... -
The role of a positive feedforward loop in regulating yeast glycolytic intermediate dynamics
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Yeast glycolysis is a well-studied model for metabolic pathways and fundamental aspects of regulation. Whereas negative feedback is common in metabolic networks; positive feedforward regulation is much ... -
Resonant ionization spectroscopy for laser isotope separation of zinc isotopes
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The vast zinc (Zn) reserves in South Africa are currently being underutilized, as the Zn ore refinement and isotope enrichment occurs abroad. The enrichment process most commonly used thus relies only ... -
Quantifying the insulin response in mouse C2C12 skeletal muscle: a minimal modelling approach
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The insulin signalling cascade is one of the most important regulatory and signalling pathways in humans. Dysregulation or dysfunction of the insulin signalling path- ways often underlies the molecular ... -
Potential impacts of climate change on groundwater recharge in South Africa using stable isotopes of water
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Unimodal wet season precipitation plays a significant role in ensuring sustainable and continuous replenishment of groundwater resources, especially in arid to semi-arid climates that only ... -
Phasor representation of oscillatory biochemical pathways
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Oscillations or rhythms arise in many biological systems such as biochemical pathways. Numerous mathematical models and experimental data sets of such systems display sustained oscillations in both the ... -
On the relationship between thermodynamic disequilibrium ratio and flux control of metabolic pathways
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: This study presents a methodology to determine and compare flux control co- efficients, as defined in the metabolic control analysis framework, with dise- quilibrium ratios of reactions in metabolic ... -
Offline writer authentication
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: In this thesis a number of systems are proposed for the purpose of offline writer authentication. A text-dependent approach is adopted, since a very specific targeted handwritten word is considered for ... -
Novel analytical methods for the determination of antiretroviral drugs and their metabolites in environmental water samples.
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH SUMMARY: The occurrence and persistence of pharmaceuticals in aquatic environments is a topical public health issue because of their perpetual discharge into the environment as intact- or biotransformed products. ... -
Multi-spectral object tracking and prediction of kinematic quantities
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The use of convolutional neural networks in object identification is well-documented and useful in a variety of applications. Particularly, when combined with a tracking algorithm such as SORT or DeepSORT, ...
