Browsing Masters Degrees (Chemistry) by Title
Now showing items 128-147 of 287
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A kinetic and equilibrium study of rooibos tea infusions.
(1998)The total mineral ion concentration of Rooibos Tea was determined using ICP-OES. Significant concentrations of Na, K, Mg, Ca, P were found, and trace levels of Al, Fe, Mo, Sr, Zn, Ba, Cu and Pb detected. Protocatechuic ... -
A kinetic and mechanistic study into the substition behaviour of Plantinum (II) Polypyridyl complexes with a series of Azole Ligands.
(2010)A novel platinum(II) complex, [Pt{4-(o-tolyl)-6-(3˝-isoquinoyl)-2,2´-bipyridine}Cl]SbF6 (Pt4) was synthesized and characterised by means of infrared, elemental analysis, mass spectroscopy, and NMR spectroscopy. Substitution ... -
A kinetic and mechanistic study of cyclic amine functionalized platinum(II) complexes with bio-relevant nitrogen nucleophiles.
(2018)In this study, four square-planar platinum(II) complexes were synthesized namely C1S1, C2S1, C3S1 and C4S1. The novel platinum(II) complex (C4S1) was synthesized using methods detailed in Chapter 4 and characterized using ... -
A kinetic and mechanistic study of dinuclear platinum (II) complexes with bis-(4'-terpyridyl)-a,w-alkyldiol ligands.
(2012)A series of novel Bis 2,2':6',2″-terpyridinyl ligands, linked through a flexible alkyl chain situated at the 4' position, were synthesised and characterised by microanalysis, FTIR, NMR, UV-Visible spectroscopy, and MS-ToF. ... -
Kumada and liebeskind-srogl coupling of aryl thiosulfonates as electrophilic coupling partners in the synthesis of biaryls.
(2021)The need and desire for versatility and diversity in cross-coupling reactions was the drive for the studies conducted in this thesis. Traditionally, transition-metal catalyzed crosscoupling reactions have heavily relied ... -
Layered double hydroxides : synthesis and application in gene delivery to mammalian cells in culture.
(2010)Layered double hydroxides (LDHs) or hydrotalcite-like compounds (HTLcs) are classified as anionic clays in which their structure is based upon brucite and are represented by the following general chemical formula: [MII1-xMIII ... -
The liquid-liquid extraction of Germaniun with the 7-alkylated 8- hydroxyquinoline derivative - KELEX 100.
(1990)Germanium can be extracted from aqueous solutions by KELEX 100 dissolved in an appropriate diluent. KELEX 100 is a commercially available chelating extractant containing the active constituent 7-(4ethyl-l-methyloctyl) ... -
Maize (Zea mays L.) seed quality in response to simulated hail damage.
(2015)Maize (Zea mays L.) is the most important cereal grain crop produced in various environments throughout South Africa. Maize is vulnerable to hail damage because it can reduce crop yield or may result in complete yield and ... -
Metal complexes with phosphor-1, 1-dithiolato ligands : green synthesis, structures, antimicrobial studies and dye-sensitized solar cell application.
(2016)Abstract available in PDF file. -
Metal powder production by pyrolysis of metal oxalates and carbonyl clusters.
(2001)Chapter One serves as an introduction to, and background information, on the thermal decomposition of metal oxalates and homonucleus carbonyl clusters. Emphasis is placed on the compounds under investigation, namely the ... -
Metallic nanoparticle-graphene quantum dot nanocomposites for the electrochemical detection of methyl parathion.
(2017)This work reports on the detection of methyl parathion (MP) on electrodes constructed or decorated with graphene based nanomaterials. The sensing nanomaterials used include graphene quantum dots (GQDs), metal oxide [(MO): ... -
Method development and application for the determination of polycyclic aromatic hydrocarbons (PAHs) in KwaZulu-Natal, South Africa.
(2018)This work involved the analysis of PAHs under optimized conditions of gas chromatographymass spectrometry (GC-MS) method and after extracting by optimised ultrasonic extraction (USE) (for sediment samples) and solid phase ... -
Method development and application: solid phase extraction (SPE), ultrasonic extraction (UE) and soxhlet extraction (SE) for the analysis of pesticides in water, soil, sediment and sludge.
(2019)Ultrasonic extraction (UE), Soxhlet extraction (SE) and solid phase extraction (SPE) have been developed and applied for the simultaneous determination of the five most commonly used triazine pesticides. The extraction ... -
Method development and application: solid phase extraction (SPE), ultrasonic extraction (UE) and soxhlet extraction (SE) for the determination of antiretroviral drugs in river water, wastewater, sludge, soil and sediment.
(2022)Antiretroviral drugs (ARVs) are a group of pharmaceuticals that have been recognized to be present in the environment and most of them have been reported to be environmentally persistent. However, most studies have ... -
Methods development and application for triazine herbicides determination in fruits and vegetables: comparing the significance of solid phase extraction, QuEChERS extraction, and ultrasonic solvent extraction techniques.
(2021)This work reports on a quick, easy, cheap, effective, rugged, and safe (QuEChERS), solid phase extraction (SPE) and ultrasonic solvent extraction (USE), combined with liquid chromatography-photodiode array detection ... -
Methoxycarbonylation of higher olefins catalysed by (pyrazolyl-ethyl)-pyridine palladium(II) complexes.
(2018)Methoxycarbonylation belongs to the family of carbonylation reactions that are efficiently catalysed by homogeneous palladium catalysts to give ester products. To date, achieving cost effect, stable and selective catalysts ... -
Molecular and characterization studies of New Delhi metallo-β-lactamase.
(2019)ABSTRACT The increasing rate of antibiotic resistance within human pathogens has caused global concern. Bacterial strains have employed several strategies to resist β-lactam antibiotics, the most prevalent being the ... -
Molluscicides and other compounds from indigenous plants.
(1996)The use of plants with molluscicidal properties IS a simple, inexpensive and appropriate technology for focal control of the snail vector. Isolation and identification of the active constituents is essential for the study ... -
N-butane activation over ruthenium and iron promoted VPO catalysts.
(2009)The Fe- and Ru-promoted vanadium phosphorus oxide (VPO) catalysts were synthesized via the organic route in iso-butanol to form the VPO precursor, VOHPO4·0.5H2O. The resulting precursor was then activated in a stream of ...