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ETD imports: Recent submissions
Now showing items 1-20 of 176
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(University of Pretoria, 1953)
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(University of Pretoria, 1998)Flow-through systems are progressively becoming more important in all branches of analytical chemistry. The increased demand for analysis of more complex environmental samples has resulted in development of reliable, ...
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(University of Pretoria, 1993)Phylogeographic mitochondrial DNA (mtDNA) population structure was determined for Pronolagus rupestris and P. randensis, two species of red rock rabbit occurring in South Africa. The study revealed that P. randensis mtDNA ...
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(University of Pretoria, 1976)This study comprises a general geological investigation of the rocks from an area 1 200 square km in size, situated about 50 km'north-east of Marble Hall. The area lies upon the Sekhukhune Plateau and is dominated by acid ...
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(University of Pretoria, 1990)Investigation of toxic extracts from cultures of the fungus Diplodia maydis (Berk.) Sacc. [ synonyms D. zeae (Schw.) Lev. and Stenocarpella maydis (Berk.)] led to the isolation of diplodiatoxin, a known metabolite, as well ...
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(University of Pretoria, 1996)Because of their extraordinary properties, advanced ceramic materials, e.g. ZrO2 , offer new possibilities to science and technology in such important areas as microelectronics, high temperature applications in reactors ...
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(University of Pretoria, 1977)Optical investigation of the orthopyroxenes also revealed a compositional break in the differentiation sequence at the height of the Pyroxenite Marker. A reversal in the trend of iron enrichment is recorded at all four of ...
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(University of Pretoria, 1993)A series of new laterally fluorinated liquid crystals containing a single chiral centre on the terminal chain, was synthesised. All the compounds, with a single exception, exhibit a ferroelectric smectic C* phase. Their ...
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(University of Pretoria, 1986)Samples of each batch of legume inoculant manufactured in South-Africa, are tested by the Plant Protection Research Institute for the number of viable Rhizobium and Bradyrhizobium cells per gram peat, strain identity and ...
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(University of Pretoria, 1993)Zircon is dissociated in a direct arc plasma to a chemically reactive form called Plasma Dissociated Zircon, which is dissolved in HF. Distillation of the mother liquor is controlled on the basis of the prevention of the ...
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(University of Pretoria, 1968)The Bushveld Complex, which is the largest mafic and ultramafic complex of its kind in the world does not contain copper and nickeliferous ores, with the exception of the Merensky Reef and the sulphide pegmatoids of the ...
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(University of Pretoria, 2000)Lachnaea L., a genus endemic to the Cape Floristic Region, occurs almost exclusively in fynbos vegetation. In this revision a brief taxonomic history of Lachnaea is presented. Palynology and chromosome numbers were found ...
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(University of Pretoria, 1997)The effect of various simulated grazing and water stress treatments were studied in three winter ephemeral species, namely Dimorphotheca sinuata, Grielum humifusum and Osteospermum hyoseroides by means of pot trials. The ...
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(University of Pretoria, 1964)Die horingfels en die kwartsiet van die boonste gedeelte van die Etage Magaliesberg suid van Burgersfort in Oos- Transvaal het baie aandag geniet in hierdie ondersoek. Die gesteentes was veral aan kontakmetamorfose onderworpe ...
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(University of Pretoria, 1992)Mathematics anxiety is a well-known phenomenon causing concern in both schools and the work place. The aim of this study is to investigate the occurrence of mathematics anxiety in standard 6 pupils. The research comprises ...
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(University of Pretoria, 1985)It has long been noticed that there appears to be stratigraphic equivalents for the major coal seams in the Witbank, Highveld and Eastern Transvaal coal fields. In order to correlate these seams, readily available coal ...
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(University of Pretoria, 1986)A discussion of the theory of inductively coupled plasma (ICP) emission spectrometry, with particular attention being paid to the question of detection limit, leads on to an overview of the analytical application of the ...
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(University of Pretoria, 1999)During the last 19 years a minimum of 72 humpback dolphins Sousa chinensis were retrieved from the Richards Bay shark nets. Recently developed acoustic warning devices led to the introduction of these devices (pingers) ...
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(University of Pretoria, 1969)The interpretation of faults and joints on the bas is of stresses in the earth I s crust has been attempted on many occasions. The main problem encountered in such interpretations has been that the physical conditions, and ...
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(University of Pretoria, 1978)Part of the Transvaal Supergroup, viz. the upper formations of the Chuniespoort Group and the Pretoria Group between Zeerust and the border with Botswana, was mapped. The metamorphic aureole of the Bushveld Complex as ...
Now showing items 1-20 of 176