Abstract The difficulties involved in the taxonomy of the genus Crassula, such as the extensive variation and often difficult species complexes, vicariousness and hybridization, are sketched against a historical background. These difficulties have prompted the author to review concepts of taxa from subspecific to generic level and have also le~ to the approach adopted in this work. It is argued that in several genera and sections, as previously recognized, too much stress was placed on the se...
Abstract It is the intention of this thesis to bring together the existing scattered data concerning the Amphipoda of southern Africa, to add records from unidentified collections and to present the whole in a form that will provide a firm basis for future work in this field. The collections examined are principally those of the University of Cape Town, the South African Museum and the National Institute for Water Research. These collections are together much larger than any previously report...
ABSTRACT Closed expressions for differential cross sections are derived from the Austern-Blair theory of inelastic nuclear scattering. These formulae are an extension of the strong absorption model of Frahn and Venter for elastic scattering. AU the well-known features of inelastic angular distributions of composite particles are shown explicitly. These include effects of. the multipolarity of the transition, the nuclear interaction, the Coulomb force and the shape of the reflection coefficien...
Abstract Although the phytoplankton of the waters off the west coast of South Africa (the Benguela Current region) s ha .. been the subject of several detailed studies in the past, data on that of the s.w. Indian Ocean has been almost entirely restricted to incidental references in the reports of expeditions which have passed through the area. Consequently, little has been known of the species composition and distribution of the phytoplankton, and nothing of its seasonal fluctuations. This st...
The Analysis Of Late Stone Age Hafting Cements From The Cape Province, South Africa
Abstract The work of Hotz showed the lack of knowledge of the behaviour of electrolytes in acetone solutions as well as the uncertainty as to the pos~ibility of preparing anhydrous acetone and the stability of this solvent, if it could be prepared. An extensive study was therefore undertaken in which the efficiency of various desiccants vJas studied in producing acetone as anhydrous as could be obtained. A very efficient still was designed and the average water content of the acetone produced...
CONTENTS SUMMARY THE AMPHIPODA OF SOUTHERN AFRICA 1 Part 1. Part 2. Part 3. Part 4. Part 5. The Gammaridea and Capre11idea of ' southe.rn Mo~ambique. Ann.S.Afr.Mus. 60 : 265-306. The Gammaridea and Capre11idea of South West Africa south of 200 S. -An-n.-S.-Af-r.M-u-s. -62 : 169-208. The Gammaridea and Capre11idea of Natal . -An-n.-S.-Af-r.M-u-s. 62 : 209-264. The Gammaridea and Capre11idea of the Cape Province east of Cape Agulhas Ann.~.Afr.Mus. 65 : 251-336. The Gammaridea and Capre11idea of...
Abstract It has been found that the gas chromatography of ammonia on certain fixed phases containing salts yields chromatograms consisting of a peak followed by a plateau or a succession of 'plateaux of progressively decreasing height. Such chromatograms have been interpreted in terms of aromine formation in the column,, ~ and methods have been theoretically elaborated.for using measurements on the chromatograms to find the dissociation pressures of the ammines and the ratios of amnonia taken...
ABSTRACT Luxury goods, used in mediaeva1 long distance trade ca. AD 900-1250, found an important market among the Iron Age peoples of southern Africa. Indirect evidence of this trade can be seen in the form of archaeological collections of glass beads at sites throughout Africa and Southeast Asia. Thousands of beads have been found at Iron Age sites in the eastern Transvaal Lowveld and at inland sites along the Limpopo Valley and in Botswana. Similar looking types of beads, referred to as sma...
A Study Of Lipids From Animal Skin Secretions
Assessment, Equity And Language Of Learning: Key Issues For Higher Education Selection In South Africa ..
ABSTRACT FROM SALISBURY TO HARARE : THE GEOGRAPHY OF PUBLIC AUTHORITY FINANCE UNDER CHANGING IDEOLOGICAL CIRCUMSTANCES This study is based on the assumption that money 'powers the urban system'. Its focus is the geography of public finance in Harare and ideologically inspired change in urban management. The context is the changing circumstances attendant upon the transfer of power from minority White settler colonial rule to Black majority rule in Zimbabwe. The ruling ZANU-PF party professed ...
ABSTRACT This investigation is a case study of landscape architectural design education in South Africa. Current forms of landscape architectural education are influenced by Global North perspectives and often, if not consciously, privilege particular ways of meaningmaking, and exclude or marginalise experiences or ways of knowing that are different. The aim of this research is to develop a landscape architectural pedagogy for diversity that fosters multiple perspectives and valorises resourc...
Table of contents Acknowledgements 4 Chapter 1 1.1 Introduction 5 1.2 Research background 6 Chapter 2 Literature Review 8 Chapter 3 3.1 Nature of the research 12 3.2 Research ethics 12 3.3 Methodology 13 Data collection 14 Data analysis 15 Chapter 4 Description 4.1 Choir manager 16 4.2 Community member 19 Chapter 5 Analysis 5.1 The choir and the community 20 5.2 Challenges 21 5.3 Achievements and Expectations 22 5.4 The importance of music 23 Chapter 6 Discussion 24 Chapter 7 7.1 Conclusion 2...
Abstract 3D cine DENSE MRI: Ventricular segmentation and myocardial strain analysis Daniel Alejandro Auger 11 February 2013 Displacement encoding with stimulated echoes (DENSE) is a quantitative magnetic resonance imaging (MRI) technique which measures myocardial displacement at a pixel resolution. Regional myocardial strain can then be calculated, providing a useful clinical measure of myocardial function. Right ventricular (RV) function is difficult to quantify because of its asymmetrica...