Browsing Masters Degrees (Chemistry) by Title
Now showing items 107-126 of 255
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Investigations into the reactions of imines and enamines.
(1993)Recent work in our laboratory has led to a new synthesis of the 2-oxo-a8'&-hexahydroquinoline ring system. This involved the condensation of B-alkylaminopropanoates with 2-methylcyclohexanone. Further reactions of ... -
Isolation and characterisation of antibacterial agents produced by soil bacterium V3.
(2006)Actinomycetes are bacteria belonging to the order of Actinomyceteles and are -
Isolation and characterisation of bioactive compounds from antidesma venosum E.Mey. ex Tul. and euphorbia cooperi N.E.Br. ex A.Berger.
(2018)The need for the discovery of new pharmacologically active compounds is a global priority as new diseases and drug resistance mechanisms are emerging and spreading throughout the world. In the past natural products have ... -
Isolation and characterisation of secondary metabolites of two asteraceae species, Artemisia afra and Elytropappus rhinocerotis.
(2009)In this study two medicinal plant species, namely Artemisia afra Jacq. ex. Willd and Elytropappus rhinocerotis Less. (L.f) (= Dicerotamnus rhinocerotis Koekemoer), both belonging to the family Asteraceae, have been ... -
Isolation and characterization of cytotxic compounds from Anthosperum hispidulum and Eriocephalus tenuifolius.
(2008)Cancer is a human tragedy that strikes and kills the lives of our beloved people. With a limited number of effective anticancer drugs from natural resources currently in use, there is a real need for new, safe, cheap and ... -
Isolation and identification of antidiabetic compounds from brachylaena discolor DC.
(2017)Abstract available in PDF file. -
The isolation, structure elucidation and biological testing of compounds from Plectranthus hadiensis.
(2010)Three diterpenes of the abietane class, 7b-acetoxy-6b-hydroxyroyleanone (I), 6b,7b- dihydroxyroyleanone (II) and ent-pimara-8(14),15-diene-3b,11a-diol (III) and three triterpenes, 2a,3a,19 -trihydroxyurs-12-en-28-oic ... -
Isothiocyanate ligand derivatives of platinum(II) terpyridines.
(2008)The novel compounds [Pt(trpy)(NCS)]SbF6 (1) and [Pt{4'-(Ph)trpy}(NCS)]SbF6 (2) where trpy = 2,2':6',2''-terpyridine, have been synthesised and characterised by means of elemental analysis, infrared and 1H NMR spectroscopy, ... -
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. ... -
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 ...