PhD / Doctoral

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Open Access
Histological and morphological studies of the endocrine organs of xenopus laevis
(1930) Rimer, Gladys E J
Xenopus Laevis has provided, during the last ten years, the basis of a growing body of physiological enquiries initiated by Jolly's research on reflex action. Its viability in the laboratory and amenability to operative procedure in particular, make it a peculiarly suitable object for investigation. It is regrettable therefore, that existing literature on the anatomy of Xenopus has been directed to elucidating those characteristics which are of especial interest to the Systematists and Morphologists rather than detailed information of a type which is essential to operative procedure. There is in particular no extant account of the endocrine system of Xenopus, although it is evident from superficial inspection that the suprarenal complex differs from that of the more familar Anura. The present enquiry concerns the Thyroid Gland, Pituitary and Epiphyseal Complexes with some observations concerning the possible occurrence of chromophil cells in the kidney of Xenopus laevis. The data have been placed on record specifically and constitution of these organs in physiological operations.
Open Access
The chromatic function in Xenopus Laevis
(1930) Slome, David
In few Amphibia is the extent of visible pigmentary effector activity as striking as in the case of the South African clawed toad. Nevertheless, there is no account on record of the phenomena of colour response in this species.
Open Access
An analysis and criticism of the English series of the South African "individual intelligence scale" (Provisional Tests-1925)
(1930) Rees-Davies, Gladys Matilda
In December, 1924, at the Annual Congress Meeting of the Suid Afrikaanse Onderwysers Unie a paper was read by Dr. H. Cruse on "Intelligence Tests and their applications to the Schools". As a result of this paper it was decided to appoint a Committee to attempt to standardize tests for pupils in South African schools, since no set of tests from any one country can be adequately adopted in any other country in view of the vast differences existing in racial and climatic conditions.
Open Access
The fundamental complex of Western Damaraland, South West Africa
(1931) Gevers, Traugott Wilhelm
Enormous areas of South West Africa, particularly in its central portion, are occupied by very ancient gneissoid and granitic rooks, a great variety of schists and other more or less highly metamorphosed sediment. These ancient rooks, forming as they do the backbone or nucleus of our continent, on which all younger rocks repose as a veneer of varying thickness and continuity are everywhere generally grouped together under the term Basement or Fundamental Complex. For obvious reasons, chief of which are their invariably highly folded and metamorphosed nature and the entire absence of fossils, these ancient sediments and their intrusives have nearly always after the first initiation of geological surveys in most countries of Africa been somewhat neglected and also visiting geologists have generally preferred to devote their attention and limited time to less complex problems, for the solution of which detailed mapping extended over many years was not an essential or indeed a sine qua non. A notable exception, however, to this rule is the detailed early work of Rogers and Du Toit in the northern Cape and of Hall in the eastern and northeastern Transvaal.
Open Access
Die Kaapkolonie, 1899-1902 : skadevergoeding en die rebelle in ere herstel
(1932) Strydom, Christiaan Johannes Scheepers; Walker, Eric
Open Access
The influence of the Gonads on Protein Metabolism
(1933) Schrire, I; Zwarenstein, H
It has long been known that the gonads exercise an important effect on the individual, nut only in recent years has it been recognized how intricate and vast this effect can be. From the earliest of times it was common knowledge that gonadectomy in either males or females resulted in sterility. Associated with this sterility were several well marked physical and mental changes, as represented by the non-appearance of the secondary sexual characters, which were shown ti be dependent on the internal secretions of the gonads. The nature of these secondary sexual characters is well-known and the changed in the individual are detailed in all text books of physiology. But the effects produced by these internal secretions have since been shown to be far more complicated involved than had hitherto been thought.
Open Access
The Pharmacological actions of Plants of the Genera Cotyledon and Crassula, N.O. Crassulaceae, with other Papers
(1935) Sapeika, Norman
The disease known as "Krimpsiekte" (Nenta, Kraamsiekte, cerebrospinal meningitis, Cotyledonosis) has been recognised in South Africa for ma.ny years. It appears in arid parts of the Cape Province, and affects animals which have ingested certain members of the genus Cotyledon (N.O. Crassulaceae).
Open Access
Studies in the physiology of creatine and creatinine
(1935) Shapiro, B G
The studies recorded in this thesis cover a wide portion of the field of creatine-creatinine metabolism. They involve a consideration of the problem of the origin of creatine, of the endocrine factors controlling its metabolism, and of the function of creatine and creatinine in the body. In order to obtain a true perspective of the place of these investigations in relation to the physiology of creatine as a whole, it is first necessary to review briefly what is known of the metabolism and function of the two substances. And, in view of the light they throw on these questions, consideration must also be given to the chemical constitution and distribution of creatine and creatinine.
Open Access
Pituitary-gonadal control of creatinine metabolism.
(1937) Cheetham, Richard William Spencer
The endocrine in general for a considerable period have been known to exert a humoraal action on the body, controlling its functions to a large extent. These actions have been closely investigated and a clear correlation between the ductless glands have been shown. The interrelation and dependency of the one upon the other, either by inhibition or by stimulation, contribute towards the finer control of the physiology of the body. The studies recorded here are comprised mainly of the dependency of one gland upon another, the relation the normal gland has to protein metabolism, and the alteration in this protein metabolism brought about by alteration in the normal function of one or other of the ductless glands. These features are demonstrated by observing changes in the elimination of creatinine in urine, for this urinary creatinine is regarded as an index of endogenous protein metabolism, and the amount excreted is remarkably constant from day to day.
Open Access
Contribution to our knowledge of the South African intertidal zone
(1938) Bright, Katherine M.F.
The two papers presented herewith as a thesis for the degree of PhD are two items from a series which is being issued from the Zoological Department of the University of Cape Town. In a sense each paper is complete in itself; but as the papers are also parts of a larger whole, it is necessary to give some indication of their position in that whole, and of the aims and results of the entire series.
Open Access
Music in Schools
(1938) Oscar D Wollheim
South Africa suffers trom a. form of cultural 'dyspepsia induced., as all forms of' dyspepsia a·re, by an unbalanced diet. It is econom.ically impossible to maintain a sufficiency of' soo4 orchestras, operas, ballets and legitimate theatres throughout this eou.ntry with the result that the publiQ has very little outside cultural stimulation. The.re is, fu~hermore, little or no heritage of song, dance and folklore. The public fee l s the need of some emotional outlet and groplta in the dark to find it. To offset this deficiency and, fearful of their cultural ignorance, people clutch at sate conventions, frenziedly clinging to them as a dro.wning Dl&n to a stnLw. Our children must learn to play the piano or violin, take dancing lessons, learn to recite and play games. These little Jllites have emerged from infancy with no background ot legend or tradition peculiar to thea to stimulate thelll to exprcuJs1on and are compelled to struggle teartully with some form ot art, usually in the shape ·or a piano. The foundation upon which to build this experience ia lacking and they give up in despair, baving formed a lifelong repreas1on 1n regard to the arts.
Open Access
Studies in the reproductive Physiology of the Amphibia
(1939) Berk, Lionel; Forman, F
The changes occurring in the red blood cells in infective illness are amongst the least carefully studied problems of haematology. In spite of the fact that these anamias are extremely common, it is difficult to find adequate literature to make possible even a clear description of the blood picture under these circumstances. Part of the difficulty is due to the fact that anaemias in infections are grouped together with other anaemia, in which many mechanisms undoubtedly active. Another major source of confusion is the fact that in many of the cases in which "secondary anaemia" occurs, complicating factors such as haemorrhage and liver disease are not adequately dealt with.
Open Access
Gravimetric studies of certain Amphibian Organs under normal and experimental conditions
(1939) Gitlin, Gershon
A cycle of seasonal ovarian weight changes in Xenopus is described, similar in all respects to that described by other workers.
Open Access
Studies in the reproductive Physiology of the Amphibia
(1939) Berk, Lionel; Forman, F
The changes occurring in the red blood cells in infective illness are amongst the least carefully studied problems of haematology. In spite of the fact that these anamias are extremely common, it is difficult to find adequate literature to make possible even a clear description of the blood picture under these circumstances. Part of the difficulty is due to the fact that anaemias in infections are grouped together with other anaemia, in which many mechanisms undoubtedly active. Another major source of confusion is the fact that in many of the cases in which "secondary anaemia" occurs, complicating factors such as haemorrhage and liver disease are not adequately dealt with.
Open Access
Metalised glass oxygen electrodes
(1939) Bain, G H
PDF document unclear
Open Access
Changes in plasma inorganic phosphate associated with endocrine activity in Xenopus laevis
(1940) Schrire, Velva; Zwarenstein, H; Irving J T
The plasma inorganic phosphate level may be influenced by (1) factors affecting the intermediary metabolism of phosphorus, (2) alternation in the degree of absorption of phosphorus, (3) alteration in the degree of excretion of phosphorus. In the introduction, the intermediary metabolism of phosphorus, particularly as far as the endocrine glands are concerned, is discussed in detail, whereas the absorption and excretion are but briefly outlined.
Open Access
Die invloed van Gerter of Leopold : 'n bydrae tot die studie van sensitivisme
(1940) William Ewart Gladstone Louw
No abstract
Open Access
The petrology of the Elephant's Head dyke and New Amalfi sheet
(1942) Poldervaart, Arie
The following is a detailed study of two allied intrusions of Karroo dolerite, situated in the Matatiele district of East Griqualand (South Africa). The one intrusion is a multiple dike of exceptional form and great length. It served as the main feeder of the second intrusion, a thick transgressive sheet. Two magmas contributed to the formation of the dike. A first intrusion of tholeiite magma was followed by the injection of a large volume of olivine-dolerite magma. The tholeiitic phase is absent in the sheet, which only contains the cooled representatives of the olivine-dolerite magma. A considerable degree of magmatic differentiation in the latter magma has led to the production of a great variety of rock types. In the dike such types are represented by picrites and olivine-dolerites, whereas the dolerites of the sheet range from olivine-bearing types to rocks, rich in soda and iron. Such variability is found to be consistent with processes of differentiation, involving gravitational settling of olivine and marked crystal-fractionation. The dike is roofed, and its behaviour recalls the characters of the Cleveland dike in northern England. Evidence is forwarded, suggesting that the dike possesses a floor as well as a roof. Both the tholeiite- and the olivine-dolerite magma were very active in their behaviour towards the associated sediments. The tholeiite magma mobilised and reacted with the Molteno sediments of the dike-walls. In the sheet a blcok of Burghersdorp sandstone was metasomatised by emanations derived from Olivine-dolerite magma. As a result a well-defined band of pale granophyric rocks was produced. Chemical and mineralogical data are given and the inferences drawn are applied to the general problem of the mode of intrusion and the differentiation of the Karroo magma.
Open Access
A Radiological study of the Right Lung
(1943) Oosthuizen, Sarel Francois
The purpose of this thesis is to illustrate the author's observations on radiological investigations of the right lung both in the living body and at post-mortem, and to describe certain aspects of anatomical, clinical, pathological and radiological interest.
Open Access
The Anaemias of Chronic Infections
(1944) Berk, Lionel
The changes occurring in the red blood cells in infective illnesses are amongst the least carefully studied problems of haematology. In spite of the fact that these anaemias are extremely common, it is different to find adequate literature to make possible even a clear description of the blood picture under these circumstances.

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