Browsing School of Chemistry and Physics by Title
Now showing items 234-253 of 700
-
Generalisation of theory and algorithms for the configurational temperature Nosé–Hoover thermostat.
(2015)In this dissertation we reformulate the configurational temperature Nos`e-Hoover thermostat proposed by Braga and Travis (C. Braga and K.P. Travis, 2005), using the antisymmetric matrix formalism found in (A. Sergi, ... -
Generation and detection of bessel beams.
(2015)In this dissertation we study the properties of Bessel-Gauss beams. Bessel-Gauss beams are created by the interference of plane waves lying on a cone, and have unique properties: they propagate without spreading and ... -
Globomycin: an interesting antimicrobial depsipeptide discovering new active analogues.
(2019)In South Africa and other African countries infectious diseases are reported to be the main health problem and results into death. This is the reason why the pharmaceutical industry has tried to develop new antibiotics to ... -
A green, solvent-free one-pot synthesis of disubstituted quinolines via A3-coupling using 1 mol% FeCl3.
(2016)Quinoline derivatives are important compounds due to their broad range of applications in medicinal, synthetic and industrial chemistry. However, current synthetic techniques such as the classical Skraup, Döebner-Miller, ... -
Growth and physical-chemical properties of carbon nanotube arrays for energy conversion devices.
(2015)Energy demand has been on the increase globally whilst there has been continuous depletion of energy sources. This has prompted investigative research towards sustainable energy through the synthesis of carbon nanotubes ... -
Heterogenisation of selective ethylene tetramerisation catalysts.
(2010)The aim of the study was to heterogenise existing tetramerisation catalysts by supporting the bis(diphenylphosphino)amine ligands on polymer. The polymer of choice was Merrifield’s resin which was functionalized to enable ... -
Heteroleptic copper (II) chemotherapeutic agents.
(2019)In this study, a range of heteroleptic copper(II) chelates were synthesized as chemotherapeutic agents. Two primary heteroleptic copper(II) chelates, [Cu(L)(H2O)2]NO3 and [Cu(L1)(H2O)2]NO3 were successfully synthesized and ... -
Heterometallic ruthenium (II)-platinum (II) complexes : a new paradigm : a kinetic, mechanistic and computational investigation into substitution behaviour.
(2013)Abstract available in PDF file. -
High repetition rate continuously tunable CO2 laser system investigation.
(1990)The purpose of this thesis was to investigate certain factors important for the operation of a high repetition rate continuously tunable CO2 laser. The tuning range of specific importance for this research program was ... -
High-resolution geophysical imaging and characterization of severe landslides vicinities at South-Eastern Nigeria for uni-vario-seasonal degradation monitoring and civil engineering remediation.
(2021)This research work used high-resolution geophysical methods to explore the near surface of severe gully-erosion sites. The erosion that mesmerized the environment as landslides is the major landscaping challenge facing ... -
Homogeneous dioxoruthenium(VI) catalysts for the oxidation of alcohols.
(2000)Compounds of the form RuO2(Y-py)2CI2 1 (py = pyridine, Y = H, 4-t-Bu, 3-CN, 4-CN, 2-Br, 3-Br, 4-Br, 4-Cl, 4-Me, 4-C(O)C6H5, 3-COOH, 4-COOH), RuO2ZCI2 2(Z = bipyridine, phenanthroline) and RuO2(OH)2(Y-py)2 3 (py = pyridine, ... -
Homoisoflavonids and stilbenoids from Scilla species.
(1998)Bulbs of Scilla natalensis Planch, Scilla nervosa (Burch.) Jessop, Scilla dracomontana Hilliard and Burt and Scilla kraussii Bak. (Hyacinthaceae) were investigated. The plants are widely used by the local African people ... -
The hydrogenolysis of glycerol to lower alcohols.
(2010)Much work has been done towards the hydrogenolysis of glycerol to 1,2-PDO and 1,3-PDO using various heterogeneous systems including Rh, Ru, Pt, PtRu, copper systems and Raney Ni in batch systems. However, routes to lower ... -
Hydrogeochemical modeling of the speciation and leaching of fly ash co-disposed with water, brines and organics : a case study of Sasol-Eskom coal ash disposal, South Africa.
(2012)Two coal utility plants in South Africa selected (one from Sasol and another from Eskom) for this study produce large volumes of fly ash (over 40 Mt from Eskom at Tutuka, and 3 Mt from Sasol Synfuels at Secunda annually), ... -
Identification and quantification of chelidonic acid and other ligands with potential for Ni uptake in the hyperaccumulator, Berkheya coddii.
(2014)B. coddii is a known nickel hyperaccumulator, a plant that is able to take up high levels of Ni (< 37 000 mg kg -1) without exhibiting toxic effects. It grows in serpentine soil and is endemic to the Barberton Region, ... -
Identification of triterpenoids in Brachylaena discolor DC, a plant with antidiabetic activity.
(2019)In recent times, metabolic diseases such as diabetes and hypertension have become a huge burden in populations around the world. Among these diseases, the number of diabetes mellitus cases have been increasing at an alarming ... -
Imidazolium, phosphonium and pyridinium ionic liquids with flourinated anions : synthesis characterization and applications.
(2013)Four sets of ionic compounds were synthesized, each with an organic spacer between two ligands creating a dication with the bromide as the counter anion. In each of the sets of ionic compounds, the counter anion was ... -
Immunological studies of thymine dimer quantitation.
(1992)Ultraviolet irradiation of DNA induces the formation of a number of mutagenic lesions. The most prolific of these is the cis-syn thymine dimer (formed maximally at 260 nm) and this has been implicated in the reaction ...