Browsing Masters Degrees (Chemistry) by Title
Now showing items 107-126 of 243
-
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 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)Abstract avaialble in PDF file. -
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 ... -
New dithiophosphonate complexes of nickel, cadmium, mercury and lead.
(2015-01-05)This study was primarily focused on the synthesis and structural X-ray crystallographic analyses of new complexes. The work undertaken investigated the reactivity of the diphosphetane disulfide dimer, [P(4-C6H4OEt)S(S)]2, ... -
Non-equilibrium quantum dynamics of condensed matter models.
(2013)In this dissertation, we studied the generation of squeezed states induced by a timedependent interaction and the in uence of temperature on the strength of the squeezing in a condensed matter model. The model studied ... -
Novel ruthenium (ll/lll) complexes with multidentate Schiff base chelates containing biologically relevant moieties.
(2014)The discovery of novel ruthenium metallopharmaceuticals is highly dependent on its coordination chemistry. As emphasized in Chapter 1, the biodistribution pathway of a potential ruthenium metallopharmaceutical depends ... -
The oxidation of n-octane by iridium and cobalt PNP complexes.
(2011)Paraffin activation has practical implications in the replacement of current petrochemical feedstocks (olefins), by utilizing economical and easily accessible alkanes, which may result in more efficient strategies for ... -
Oxidation of primary alcohols to aldehydes and esters.
(1998)The initial aim of this research project was to oxidise Cr C4 alcohols to their respective aldehydes. However, isolation of these aldehydes was impossible due to their low boiling points. Another problem was the proximity ... -
The oxidative activation of n-octane over titania supported cobalt catalysts.
(2015-01-05)This research effort explored routes to valorise alkanes via heterogeneous catalysis. Dehydrogenation and oxidative dehydrogenation are the two routes that were probed in this research effort to activate n-octane by means ...