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ETD imports: Recent submissions
Now showing items 21-40 of 176
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(University of Pretoria, 1995)A taxonomic revision of all the southern African spiny members of the Celastroideae is presented. Evidence from macromorphology, leaf anatomy, ecology and phytogeography are used as a basis for classification. The genus ...
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(University of Pretoria, 1966)In the Social Sciences, and recently also in other Sciences, constructs (latent variables) are being measured. It is however, not possible to know in advance whether the questions being asked will accurately measure the ...
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(University of Pretoria, 1987)The purpose of this dissertation was to determine the reasons for the low seed set in D. eriantha. Aspects such as flower anthesis, pollen morphology, pollination, pollen viability, the morphology of the embryo sacs and ...
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(University of Pretoria, 1991)The reaction of 2-methyl-1-pentene with phosphorus pentachloride gave invariably a mixture of products which could not be isomerised to produce single compounds. Similarly, five compounds were obtained following the ...
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(University of Pretoria, 1994)In this thesis the concept of collectively compact sets of operators is studied. As a reason for the study of such operators it is shown how collectively compact sets of operators are applicable to an approximation theory ...
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(University of Pretoria, 1986)If Bis a linear operator with domain DCB) contained in a Banach space X and range in a Banach space Y, the family {S(t):t>O} of bounded, linear operators defined on Y is called a B-evolution if S(t)CYJ c D(B) and SCt+s) = ...
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(University of Pretoria, 1988)Comparisons were given for the decomposition reactions of several metal complexes containing ligands related to pyridine. The ligands pyridine, quinoline, aniline, a-, b-, r-picoline were studied. The metal complexes ...
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(University of Pretoria, 1983)No literature could be found covering the subject of developmental morphology of the inflorescence of OrnithogaZuthyrsoides. This study filled the existing gap in the literature. The development (differentiation) is discussed ...
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(University of Pretoria, 1984)Areas of the economically important Far West Rand, which are underlain by dolomite, have a latent potential for the development of unstable ground conditions ranging in intensity from catastrophic sinkhole occurrences to ...
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(University of Pretoria, 1962)During the field-seasons of 1960 and 1961 an area of 60 square miles was mapped in the vicinity of Kennedy's Vale~ District Lydenburge so acquired is presented on the map. The information The Dwars River Fragment, a mass ...
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(University of Pretoria, 1986)A taxonomic revision of the southern African species of the genus Ctenolepisma gscherich (Thysanura: Lepismatidae) is provided. The 19 described species are treated and 16 are retained after one species is transferred to ...
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(University of Pretoria, 1994)The interspecific differences in sociality between closely related taxa are generally attributable to differences in habitats, foraging ecology, predation and resource distribution (Rubenstein & Wrangham 1986). The social ...
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(University of Pretoria, 1992)This thesis is focused on the nucleophilic reactivity of selected classes of phosphoryl compounds, i.e. systems of the general formula XYZP(O). In this study, at least one of the substituents X, Y, or Z, represents an ...
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(University of Pretoria, 1979)In this research the need for a statistically standardised instrument for the identification and interpretation of cognitive learning and motivation strategies in the natural sciences is investigated. Specific reference ...
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(University of Pretoria, 2002)Bathyergus Janetta is a solitary subterranean rodent that occurs in the very restricted areas of Namaqualand. This bathyergid is able to survive the arid environment due to the predictable winter rainfall that gives rise ...
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(University of Pretoria, 1993)In many fields of application, such as biology, psychology, agriculture, geology, botany, engineering and medicine, experiments are conducted in which a number of responses are repeatedly measured on each of a number of ...
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(University of Pretoria, 1975)Phenological and morphological studies of the flower were done at Zomerkomst Forest Research Station, in order to obtain a clearer understanding of floral biology. The breeding system and related subjects could then be ...
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(University of Pretoria, 1985)Literature on the estimation of standard errors of estimators of variable values for complex samples is not so commonly obtainable as that concerning simple random sampling with independent observations. The complexity of ...
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(University of Pretoria, 1977)The Usushwana Complex consists of a suite of hypabyssal, volcanic and plutonic rocks emplaced after deposition of the Pongola Group and in turn intruded by Pongola granite. The geological history against which the petrology ...
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(University of Pretoria, 1994)The novelty of newly bred cultivars need to be established, since a certificate of protection is granted to breeders to protect their plant breeders' rights. Traditionally, newly bred cultivars were typified by means of ...
Now showing items 21-40 of 176