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ETD imports: Recent submissions
Now showing items 121-140 of 176
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(University of Pretoria, 1997)TiO2 was treated with inorganic and organic surface agents under different conditions and the aim was to improve the qualities of the pigment and to determine the role of the adsorbed hydroxyl ions in these qualities. Good ...
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(University of Pretoria, 1943)
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(University of Pretoria, 1987)Governing equations and subsidiary conditions are required for a well-posed problem. Governing equations are derived from conservation laws and constitutive equations. The applicable conservation law in this dissertation, ...
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(University of Pretoria, 1979)Food of the Cape clawless otter was estimated from faeces analysis. This was compared with apparent availability estimated from selected sampling in the littoral zone. An apparent selection of red rock crabs, octopuses and ...
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(University of Pretoria, 1993)The Bardeen-Cooper-Schrieffer (BCS) theory of superconductivity affords a very good microscopic understanding of metallic superconductors, where the electron-electron interaction is known to be phonon-mediated. However, ...
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(University of Pretoria, 1992)The metals cadmium, chromium, copper, iron, mercury, manganese, molybdenum, nickel, titanium, vanadium, zinc, aluminium and the non-metals arsenic and boron are discussed from a theoretical viewpoint with specific attention ...
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(University of Pretoria, 1986)This study comprises the syntheses, reactions and structures of some new metallocyclic chelates of chromium(O) with N, Sand O donor-atoms. Reactions of .£_-lithiated organoreagents Q-RXC 6H4Li;X=O,S,NMe and R=Me) with ...
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(University of Pretoria, 1989)Eight different species of the genus Termitomyces Heim were collected in the Republic of South Africa viz. : (i) T. umkowaani (Cooke & Mass.) Reid (ii) T. reticulatus v. d. Westh. & Eicker sp. nov. (iii) T. sagittaeformis ...
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(University of Pretoria, 1956)The geological succession in the northwestern portion of the Orange Free State Gold-fields, as disclosed by twenty-one bore-holes, is described. Special attention is paid to the Rainbow Reefs, occurring in the strata between ...
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(University of Pretoria, 1984)The porcupine Hystriix africaeaustralis inhabits a wide range of habitat types throughout the Southern African Subregion and density in foraging areas in the Tussen-die-Riviere Game Fann (30°25' to 30°26'S/26°04' to 26°20'£) ...
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(University of Pretoria, 1993)The vegetation of the study area, which covers 1407 km2, was mapped on a scale of 1:50 000. The mapping units were simplified to major vegetation types. . Veld condition differences were sampled in the major vegetation ...
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(University of Pretoria, 1991)An investigation is made of the deuterium-deuterium nuclear fusion in a gas-pressurized, thermally cycled titanium-deuteride in the temperature region between 80 and 600 K. A compound neutron and, detection system, consisting ...
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(University of Pretoria, 1981)The Highveld gerbil (Tatera brantsii), a pest of grain crops on the Transvaal Highveld and in the northern Orange Free State, was exposed to laboratory and field tests with anticoagulant and acute rodenticides. The tested ...
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(University of Pretoria, 1955)The conclusion is upheld that the two zones of quartzite xenoliths in the area represent detached fragments of the Magaliesberg horizon separated from the floor of the Bushveld Igneous Complex by the intrusion of the latter. ...
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(University of Pretoria, 1991)The problem of manufacturing good ohmic contacts onto cadmium telluride (CdTe) served as a motivation for this study. The accuracy and reliability of the method used to calculate the specific contact resistance of ohmic ...
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(University of Pretoria, 1981)Four new gum stationary phases suitable for use in glass capillary columns have been prepared by radiation-induced copolymerization of chlorotrifluoroethylene with the following comonomers: ethyl vinyl ether, butyl vinyl ...
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(University of Pretoria, 1988)The thermal decomposition of some lanthanide nitrates was studied. Moving down the lanthanide series, an increasing number of reversible processes, occurring during the decomposition reactions, was observed. These ...
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(University of Pretoria, 1973)
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(University of Pretoria, 1956)Tin-deposits in the Bushveld granophyre are typically developed on the farm Stavoren 470 in the Potgietersrus District of Transvaal. A study on zircons suggests a similar origin for the Bushveld granite and the Bushveld ...
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(University of Pretoria, 1950)No abstract
Now showing items 121-140 of 176