Browsing Masters Degrees (Chemistry and Polymer Science) by Title
Now showing items 1-20 of 308
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4-Aza-Podophyllotoxins: synthesis and use as anti-cancer agents
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: Podophyllotoxins, and their derivatives, have shown significant anti-proliferative properties. Etoposide and other semi-synthetic analogues, such as teniposide, have been successfully employed ... -
A study on the reversible photo-induced isomerisation of platinum(II) and palladium(II) complexes of the N,N-dialkyl-N’-acyl(aroyl)thioureas with reversed-phase HPLC separation from related rhodium(III), ruthenium(III) and iridium(III) complexes
(Stellenbosch : Stellenbosch University, 2014-04)ENGLISH ABSTRACT: See item for full text -
AB diblock copolymers via RAFT-mediated miniemulsion polymerization
(Stellenbosch : Stellenbosch University, 2008-12)The Reversible addition fragmentation chain transfer (RAFT) technique is a robust and versatile technique that enables the synthesis of polymers of controlled molecular weight and polydispersity. The application of the ... -
An Ab Initio density functional study of the structure and stability of transition metal ozone complexes
(Stellenbosch : Stellenbosch University, 2002-12)ENGLISH ABSTRACT: A thorough search through the literature as well as through the Cambridge Crystallographic Structural Database resulted in no examples of a neutral ozone acting as ligand in a complex with any metal. ... -
Acolein in wine : bacterial origin and analytical detection
(Stellenbosch : University of Stellenbosch, 2010-03)ENGLISH ABSTRACT: Wine quality is compromised by the presence of 3-hydroxypropionaldehyde (3-HPA) due to spontaneous conversion into acrolein under wine making conditions. Acrolein is highly toxic and is presence has ... -
Alkaloidal constituents of Crinum variabile and Crinum paludosum, two southern African Amaryllidaceae species
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: The extraction of dried bulbs of Crinum variabile and subsequent targeted fractionation led to the isolation of lycorine, 1,2-O,O-diacetyllycorine, 2-O-acetyllycorine, 1-O-acetyllycorine, ... -
Alternating copolymerisation of carbon monoxide with a-olefins with a homogeneous Pd-Type catalyst
(Stellenbosch : Stellenbosch University, 1997-12)AFRIKAANSE OPSOMMING: Hierdie studie behels die alternerende kopolimerisasie van koolstofmonoksied en a-olefiene met 'n homogene palladiumkatalisator. 'n Deeglike studie oor die agtergrond van die kopolimerisasie reaksies ... -
Amino acid analysis in wines by liquid chromatography : UV and fluorescence detection without sample enrichment
(Stellenbosch : Stellenbosch University, 2003-12)ENGLISH ABSTRACT: In this study, the analysis of ammo acids usmg High Performance Liquid Chromatography (HPLC) with pre-column derivatisation was optimised. The derivatisation reagents include o-phthaldialdehyde (OPA), ... -
Amphiphilic electrospun fibres of poly(methacrylic acid)-graft-poly(dimethylsiloxane) copolymers as a means to controlling electrospun fibre morphology and obtaining nanofibre hydrogels
(Stellenbosch : Stellenbosch University, 2014-04)ENGLISH ABSTRACT: Novel poly(methacrylic acid)-graft-poly(dimethylsiloxane) copolymers were synthesised by conventional free radical reactions using a poly(dimethylsiloxane) macromonomer. The polymers were electrospun ... -
Analysis of organochloro-pesticides in Eritrean water and sediment samples
(Stellenbosch : Stellenbosch University, 2004-12)ENGLISH ABSTRACT: The choice of the sample preparation technique used in combination with a chromatographic technique in environmental analysis strongly influences the performance of the method as a whole. The main aim ... -
Anioniese Fischer-tipe karbeenkomplekse as ligande
(Stellenbosch : Stellenbosch University, 2003-12)ENGLISH ABSTRACT: Please refer to fulltext for abstract. -
Application of comprehensive 2-dimensional liquid chromatography for the analysis of complex phenolic fractions
(Stellenbosch : University of Stellenbosch, 2009-12)ENGLISH ABSTRACT: The separation of apple, cocoa and green tea phenolic compounds by comprehensive 2-dimensional liquid chromatography (2-D-LC) has been studied. In the first dimension, phenolic compounds were separated ... -
Application of comprehensive two dimensional gas chromatography to wine analysis
(Stellenbosch : Stellenbosch University, 2011-12)ENGLISH ABSTRACT: This study focused on the potential of comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC×GC-TOF-MS) for the improved analysis of volatile wine constituents. ... -
Application of comprehensive two-dimensional gas chromatography for the characterisation of the volatile composition of Honeybush tea
(Stellenbosch : Stellenbosch UniversityStellenbosch University, 2016-03)ENGLISH ABSTRACT : Honeybush tea (Cyclopia spp.), like many other natural products, contains a large number of volatile compounds with different physiochemical properties and present at widely varying concentrations. This ... -
The application of ultrasonic nebulization to ICP-AES analysis of metallurgical and geological samples
(Stellenbosch : Stellenbosch University, 1987)ENGLISH ABSTRACT: The purpose of this project was to investigate the application of ultrasonic nebulization (with and without desolvation) to inductively coupled plasma atomic emission spectroscopy (ICP-AES) for the ... -
Applications of inherently chiral calix[4]arenes
(Stellenbosch : Stellenbosch University, 2013-03)ENGLISH ABSTRACT: Calixarenes are large cyclic molecules that have a distinctive bowl-shaped geometry. The nonplanar nature of these molecules means that, by selectively functionalizing the calixarene on one side of the ... -
An assessment of variation within IAS 41 compliant methodology used in South Africa to estimate the value of pulpwood plantations
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH ABSTRACT: This study sought to assess the possible variations within International Accounting Standard (IAS) 41 compliant valuation methodologies used within South Africa to estimate the value of pulpwood ... -
Asymmetric flow field flow fractionation (AF4) of polymers with focus on polybutadienes and polyrotaxanes
(Stellenbosch : Stellenbosch University, 2012-03)ENGLISH ABSTRACT: Over the past two decades, field flow fractionation (FFF), as a polymer characterization technique, has become cutting edge technology. The demand for molar mass and size characterisation of complex polymer ... -
Atom transfer radical polymerisation of unusual monomers
(Stellenbosch : Stellenbosch University, 2003-12)ENGLISH ABSTRACT: Controlled free radical polymerisation techniques offer several practical and theoretical advantages compared to many other polymerisation techniques. Living polymerisation techniques such as anionic ... -
Attempted routes towards the synthesis of fluorinated analogues of ornithine as potential inhibitors of ornithine decarboxylase
(Stellenbosch : University of Stellenbosch, 2007-03)Human African Trypanosomiasis (HAT) is a disease that threatens more then 60 million men, woman and children in Africa. It is known that the inhibition of the enzyme, ornithine decarboxylase (ODC) leads to cell arrest ...
