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Recent submissions

Theses and Dissertations (Chemistry): Recent submissions

Now showing items 1-20 of 54

Ab initio molecular orbital theoretical studies of the molecular complexes of boron trifluoride and oxygen electron donor ligands

Modau, Eric (2021-10)

The optimized geometrical structures, the interaction energies, the basis set superposition errors (BSSEs) and the infrared spectra of the monomers, homodimers and the molecular complexes formed between BF3 and a number of ...
An investigation into the biodegradability of natural organic matter (NOM) and the resulting potential of biodegradable NOM fractions to form disinfection by-products

Sambo, Sifiso Penuel (2020-02)

Not only does the presence of excessive levels of natural organic matter (NOM) in surface waters affect the raw water quality, but it also impacts the water treatment and supply processes. Other notable challenges caused ...
The removal of dissolved organic matter (DOM) from water using photocatalysis coupled with coagulation

Moss, Lerato (2024)

Dissolved organic matter (DOM) comprises of both synthetic and natural organic compounds such as pharmaceuticals, pesticides, natural organic matter (NOM), found in the environment. Most of the DOM pollute drinking water ...
A three step approach to the degradation of natural organic matter (NOM) from water sources

Ndlangamandla, Nqobile Gugulethu (2017-06)

Natural Organic Matter (NOM) is a complex blend of organic compounds that forms naturally via the degradation of plant and animal materials into water sources. NOM in water negatively affects water quality (by causing odor, ...
Fabrication and chararcterization of spectrally selective solar absorber copper oxide (CuO) nanocoatings for photothermal application

Welegers, Giday Gebregziabher (2022-11)

Solar-to-thermal energy is considered to be the most direct way of converting solar radiation into usable forms of energy for a wide range of applications, including seawater desalination, heating water, photocatalysis, ...
Photodynamic antimicrobial chemotherapy activities of modified carbocyanine-zinc oxide nanoparticle- and nanoflower-based nanoconjugates

Khorae, Mpho Gift (2023-02-17)

The continuously rising cases of antibiotic resistance and pathogenic bacterial mutations pose a serious medical problem. Microorganisms are ubiquitous because they can adapt to conditions in any environment. They can ...
Fabrication of electrochemical sensors using manganese oxide nanostructure- and cobalt oxide nanostructure-decorated ytterbium nanorods as electrocatalysts for the detection of flutamide, bicalutamide and hydroxyflutamide in spiked samples

Ravele, Thompho (2023-02-22)

Anti-androgens (AAs) are a class of pharmaceutical drugs used to treat prostate cancer. Over the years, prostate cancer has been reported as the most frequent cancer diagnosis in men and the leading cause of mortality ...
The cytotoxic effect and molecular targets of ezetimibe in A549 lung cancer cells

Munnik, Chamone (2023)

The p53 gene is a well-known tumour suppressor gene, shown to be dysfunctional in more than 50% of human malignancies. The cellular significance of this oncogene is evident in a series of diverse cellular antiproliferation ...
Evaluation and optimization of a stand-alone solar driven membrane filtration system for surface water treatment

Kajau, Tatenda Alfred (2022-02)

South Africa is classified as a water-stressed country and is faced with widespread water scarcity. Water scarcity is worse in rural areas of the country where a third of the population still reside. This is due to low ...
Rational design of metal-organic framework (MOF)-based supercapacitor electrodes for enhanced energy storage

Opeyemi, Otun Kabir (2021-11)

Metal-organic frameworks (MOFs) are gaining popularity as a new electrode material for supercapacitor applications, due to their large specific surface area, excellent tunability and unique pore characteristics. Yet, ...
Carbon nanotube membranes for brackish groundwater desalination and removal of organic micropollutants from water

Gumbi, Nozipho Nonsikelelo (2019-07)

This thesis reports on the synthesis and characterisation of various types of oxidised multiwalled carbon nanotubes (O-MWCNTs) modified polymeric membranes. These OMWCNT modified polymeric membranes were then assessed in ...
Optical micro-manipulation in HIV-1 infected cells for improved HIV-1 treatment and diagnosis

Lugongolo, Masixole Yvonne (2020-06)

Laser application in the field of biological and medical sciences has significantly grown, thereby strengthening the field of Biophotonics. Research conducted in Biophotonics focuses on the concept of using light especially ...
Synthesis, biological evaluation and molecular docking studies of novel indole- and benzofuran-chalcone and benzofuran-quinazoline hybrids as anticancer agents

Maluleka, Marole Maria (2019-07)

Specially prepared 2-amino-5-bromo-3-iodoacetophenone and 5-bromo-2-hydroxy-3 iodoacetophenone were subjected to Claisen-Schmidt aldol condensation with benzaldehyde derivatives followed by sequential and/or one-pot ...
Metagenomic discovery and characterisation of restriction endonuclease from Kogelberg Biosphere Reserve

Mtimka, Sibongile (2018-05)

Restriction endonucleases are a group of enzymes that cleave DNA at or around specific sequences, which are typically palindromic. A fosmid library was constructed from a metagenome isolated from soil from the Kogelberg ...
Dispersive liquid-liquid micro-extraction of Chloramphenicol and its congeners residues in water, meat and milk followed by electron spray ionisation liquid chromaotgraphy tandem mass spectrometry detection

Kemokgatla, Ompelege E. (2017-10)

The use of veterinary drugs continues to be a challenge since some farmers use drugs for medicinal purposes, while others use them as growth promoters without observing the set withdrawal times. In emerging economies, ...
Determination of quinolones in bovine kidney using hollow-fiber supported liquid membrane extraction prior to liquid chromatography tandem mass spectrometry

Gaolape, Kefilwe Precious (2017-10)

Focus of this study was on the development of one of the faster, simpler, cost effective and environmentally friendly sample pre-treatment techniques which employs a supported liquid membrane, in this case a Hollow-fiber ...
The determination of pharmaceutical and personal care products in water and wastewater by gas chromatography-mass spectrometry

Nety, Sol Sauna (2017-09)

Emerging contaminants (EC) are unregulated substances that have entered the environment for as long as they have been produced through human activities. Within the ECs family, pharmaceuticals and personal-care products ...
Multi-residue determination of b-agonists in bovine muscle using dispersive liquid liquid microextraction by +esi tandem mass spectrometry

Kgothi, Phomolo (2017)

A dispersive liquid-liquid microextraction (DLLME) method has been developed, optimized and validated for the extraction of seven beta-agonists (Cimaterol, Cimbuterol, Clenproperol, Clenbuterol, Ractopamine, Isoxsuprine ...
Fractionation of natural organic matter (NOM) in water using prepared porous silica based materials as size exclusion (SEC)/GEL permeation chromatography (GPC) stationary phases

Bopape, Dineo Anna (2017-06)

Natural organic matter (NOM) is a diverse blend of decomposed animal and plant material found in different natural water sources. Due to its large and complex structure, NOM is difficult to both remove and characterize ...
Synthesis, characterization and anticancer studies of Osmium-cymene complexes with O,O'- and P,P'-chelators as well as monodentate N- and P-donar ligands

Tapala, Kgaugelo Cornelius (2017-08)

Seventeen novel osmium cymene complexes with O,O′- and P,P′-chelating ligands as well as N- and P-monodentate ligands are reported. The osmium cymene complexes were synthesised and characterised by spectroscopic techniques ...

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