Now showing items 1-10 of 79
Synthesis and characterisation of a selection of phthalocyanines covalently bonded to water-soluble polymers and a ferrocenyl fragment
(University of the Free State, 1998-06)
English: This thesis is concerned with the synthesis of phthalocyanine derivatives and their anchoring onto water-soluble polyaspartamides to produce compounds that may have biomedical applications, especially in the ...
A system for drought monitoring and severity assessment
(University of the Free State, 1995-02)
English: The objectives of this study were: (i) to develop a near real-time crop-specific drought monitoring system that delimits drought stricken areas and assesses the severity of droughts in these areas, (ii) to ...
The expression of leaf rust resistance in wheat lines containing Lr12 and Lr13
(University of the Free State, 1995-11-30)
Monogenic resistance in wheat (Triticum aestivum L.) to leaf rust, caused by Puccinia recondita Rob. ex. Desm. f. sp. tritici, has generally not been durable. One strategy of attaining durable resistance to rust diseases ...
The development of a virtual reality simulator for certain gastrointestinal endoscopic procedures
(University of the Free State, 1999-05)
English: A Virtual Reality Gastrointestinal Trainer/Simulator has been developed to enable the simulation of gastrointestinal procedures on a personal computer (PC). Virtual Reality (VR) techniques are used in the ...
Chemical kinetics, electrochemistry and structural aspects of ferrocene-containing b-diketonato complexes of rhodium(I) and iridium(I)
(University of the Free State, 1999)
English: Synthetic routes to prepare new Rh(I)-β-diketonate complexes [Rh(FcCOCHCOR)(CO)2] and [Rh(FcCOCHCOR)(CO)(PPh3)] with Fc = ferrocenyl and R = Fc, C6H5, CH3 and CF3 have been developed and optimized. Optimized ...
The genus Cheiracanthium (Araneae: Clubionidae) in southern Africa
(University of the Free State, 1995-11)
English: The southern African representatives of Cheiracanthium C.L. Koch, 1839 are revised after examining 617 adult specimens. Eight species of Cheiracanthium are recognized from this region, four are new (C. dippenaarae, ...
Grain yield and breadmaking quality of wheat lines with leaf rust resistance genes Lr29, Lr34, Lr35, and Lr37
(University of the Free State, 1999-06)
English: 1. The aim of this study was to determine if the leaf rust resistance genes Lr2g, Lr34, Lr35 and Lr37 have an effect on the quality and yield characteristics of a cultivar it is incorporated into. 2. Near-isogenic ...
An assessment of endophytic fungi in needles of three pinus spp. cultivated in South Africa
(University of the Free State, 1999-11)
English: Endophytes, in the strict sense, are organisms that cause symptom less infections in plants. As symptomless mutualists, they can act as biocontrol agents of herbivorous insects and plant diseases. They can also ...
Mode identification in delta δ Scuti stars
(University of the Free State, 1998-10)
This thesis discusses mode-identification from multicolour photometry. First, the need for a better mode identification technique for stars that have significant phase differences between the light curves in different ...
Architecture on paper: a study on the significance of imaginary architectural space
(University of the Free State, 1998-11)
Abstract not available