Browsing Masters Degrees (Chemistry) by Title
Now showing items 1-20 of 112
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Application of the cross-metathesis reaction as alternative methodology for the synthesis of paramethoxycinnamate analogues as sunscreen components
(University of the Free State, 2016-01)2-Ethylhexyl p-methoxycinnamate [Octyl methoxycinnamate (OMC)] is an organic compound that is commercially used in the cosmetic industry as a UV blocker in sunscreen creams and lotions. Commercial production of this compound, ... -
Atropisomerie in nuwe tipe bifeniel en o-terfeniel gekondenseerde tanniene
(University of the Free State, 1984-03)Afrikaans: Chemiese ondersoek van die kernhout van Prosopis gZanduZosa het aan die lig gebring dat dit oor 'n komplekse flavanoïedinhoud beskik. As gevolg van hierdie kompleksiteit, was genoegsame materiaal en 'n aantal ... -
The characterisation and kinetic study of rhodium(I) and iridium(I) triazole complexes
(University of the Free State, 2000-11)English: A number of triazolecyclooctadienemetal(l) complexes of the type [M(LL')(cod)] (where M = Ir or Rh and LL' represents the different bidentate N-N'- donor atom ligands, such as bpt-Nl+ and bpt) as well as their ... -
Chemical profile of walnuts (Juglans regia L.) and synthesis of stilbenes from Arformosia elata
(University of the Free State, 2007-01)Firstly, this study presents an in-depth investigation on Walnuts (the nuts of Juglans regia L.). Walnuts (Juglans regia L.) are members of the relatively small Juglandaceae family, which have shown positive results in ... -
Comparison of injection moulded, natural fibre reinforced composites with PP and PLA as matrices
(University of the Free State (Qwaqwa Campus), 2010-12-07)Poly(lactic acid) (PLA) and polypropylene (PP) were comparatively investigated as matrices for injection moulded composites containing small (1-3 wt.%) amounts of short sisal fibre. The polymers and fibres were mechanically ... -
Computational, structural and electrochemical properties of metal (III) tris-betadiketonato complexes
(University of the Free State, 2012)English: A series of MnIII(β-diketonato)3 complexes (β-diketonato = acac, ba, dbm, tfaa, tfth, tffu, tfba and hfac) were synthesized and characterized with the aid of mass spectroscopy, elemental analysis, X-ray diffraction ... -
Copper based nanomaterials for oxidation catalysis
(University of the Free State, 2009-11)English: The aim of this study was the synthesis simple O,O-bidentate ligand copper complexes of the type [Cu(Memal)2], [Cu(Etmal)2], [Cu(Trop)2] and [Cu(TropBr3)2], where Memal = 2- methyl-3-hydroxy-4-pyrone, Etmal = ... -
A crystallographic and mechanistic investigation of manganese(i) tricarbonyl complexes
(University of the Free State, 2013-11)Manganese has largely been used as a catalyst in epoxidation of olefins and the selective oxidation of unactivated C-H bonds in alkanes. Another major use of manganese is in water oxidizing catalysis, where manganese ... -
A crystallographic and mechanistic study of Mn triad complexes as model radiopharmaceuticals
(University of the Free State, 2015-02)A series of fac-manganese(I) tricarbonyl complexes were synthesized and analysed to better understand the chemical properties of the group 7 radiopharmaceutical model complex. Five new complexes containing N,O’, N,N’,O and ... -
Development and validation of bioanalytical assay methods for fentanyl in human plasma
(University of the Free State, 2004)Abstract not available -
Development and validation of bioanalytical assay methods for sildenafil in human plasma
(University of the Free State, 2004)Abstract not available -
Development of a viable protocol aimed at the synthesis of a selected natural product with possible application in the industry
(University of the Free State, 2007)Since the introduction of synthetic analogues in both the health-related and cosmetic industry, a new generation has emerged in search of beneficial bioactivity compounds. This generation of “natural and green” focuses ... -
Development of alternative technology for the production of meta-substituted phenolic compounds
(University of the Free State, 2009-11)English: Both m-cresol and resorcinol are important industrial starting materials in the production of many phenolic products. In a process similar to the one for the production of phenol, cresols are produced by reaction ... -
Development of methodology for the synthesis of 4-arylflavan-3-ol lactones
(University of the Free State, 2008-05)English: The phenolic content of the heartwood of Peltophorum africanum (African wattle) and Burkea africanum (Red syringa) proved to contain a variety of compounds including the novel 4-arylflavan-3-ol lactones, ... -
Development of new "green" methodology for the synthesis of substituted phenylacetic acid derivatives as precursors to isoflavonoids and related compounds
(University of the Free State, 2013-01)English: Flavonoids and isoflavonoids are known to exhibit many important physiological properties and are especially promising candidates for cancer chemoprevention. Similar to most natural products, studies directed at ... -
Die eerste oligomeriese neoflavonoiede: struktuur en sintese van modelverbindings
(University of the Free State, 1993-05)Afrikaans: Hoewel oligomeriese flavonoïede reeds etlike dekades bekend is, is die eerste bi-isoflavonoïede eers onlangs uit Dalbergia spesies geïsoleer en is oligomere saamgestel uit neoflavonoïede nog onbekend. Ten einde ... -
Direkte sintese van isoflavane en 2-bensieldihidrobensofurane via α-alkilering van fenielasynsuuresters
(University of the Free State, 1991-05)Afrikaans: Hoewel verskeie isoflavonoïede wat fisiologiese aktiwiteit vertoon opties aktief geïsoleer is, bestaan daar tans geen metode vir die stereoselektiewe sintese van hierdie groep natuurprodukte nie. Aangesien geen ... -
The effect of crystalline phase morphology on the structure and properties of polypropylene impact copolymers
(University of the Free State (Qwaqwa Campus), 2012-12)The present study covers the preparation and the characterisation of β-nucleated impact polypropylene copolymer (NA-IPC), and its fractions prepared through temperature rising elution fractionation (TREF). Calcium stearate ... -
Electrochemical and adsorption studies of a carboxylic acid-modified aluminium aminoterephthalate framework (H2N-MIL-53) with heterogeneous catalysis applications
(University of the Free State, 2015-08-19)English: The Metal Organic Framework (MOF), MIL-53(Al) and its amine functionalised analogue, amino- MIL-53(Al) were synthesized in good yields (57 - 87%) and were employed as solid, porous support systems for the intrusion ... -
Enantioselektiewe sintese van trans- en cis-dihidroflavonole via chalkoonepoksiede
(University of the Free State, 1994-12)Afrikaans: Die studie van polimeriese flavonoïede en flobatanniene word gekortwiek deur die feit dat opties aktiewe monomere wat vir die sintese hiervan benodig word slegs uit natuurlike bronne beskikbaar is. Indien hierdie ...