A study of the rabbit eye test system to determine the activity of acidic non-steroidal anti-inflammatory agents
- Authors: Wiseman, Ian Charles
- Date: 1977
- Subjects: Nonsteroidal anti-inflammatory agents , Anti-inflammatory agents
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:3855 , http://hdl.handle.net/10962/d1013276
- Description: From introduction : "Inflammation per se, has been defined sufficiently to permit a rational approach to the search for drugs that modify this process, but satisfactory animal models for most rheumatoid diseases are not available". (Swingle 1974) In the search for new meaningful procedures for the detection and evaluation of anti-inflammatory drugs, the rabbit eye as a test system was studied.
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- Date Issued: 1977
Colour vision of the citrus psylla Trioza erytreae (Del Guercio) (Homoptera: Psyllidae) in relation to alightment colour preferences
- Authors: Urban, Alan Joseph
- Date: 1977
- Subjects: Trioza , Homoptera , Jumping plant-lice , Color vision
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:5885 , http://hdl.handle.net/10962/d1013286
- Description: The colour vision of adult citrus psylla, Trioza erytreae, was investigated in the laboratory using the behavioural parameters: alightment and walking. Light green flushing leaves (under which the nymphs develop) were significantly preferred, visually, to dark green mature leaves for alightment. Diffuse reflectance spectroscopy showed (when expressed in the parameters of human colour vision) that flush has a very slightly longer dominant wavelength, and roughly double the reflectance and purity. Alightrnent frequency correlated almost equally well with "purity" (as noted by Moericke, 1952 et seq., in "yellow-sensitive" aphids) as with the aphidological colour parameter "long/short ratio" developed by Kennedy et al. (1961). Elucidation of the mechanism underlying the citrus psylla's alightment colour preference was initially attempted with a printed spectrum and several paint series of measured spectral characteristics. It was clear that T.erytreae belongs to the "yellow-sensitive" group of Homoptera, but it was impossible to distinguish which pararneter(s) of colour the psyllids were responding to. Phototactic (walking) response to the individual parameters of colour was therefore measured using a monochromator. The phototactic action spectrum (against wavelength) was tri-modal, with peaks in the yellow-green (YG), blue (B), and ultra= violet (UV). Rate of phototaxis was not influenced by bandwidth (roughly equivalent to purity), but was proportional to intensity (roughly equivalent to reflectance). To investigate the influence of the above three wavelength regions on alightment, use was made of a very simple flight chamber incorporating a target of coloured light. Yellow-green and UV light both independently stimulated alightment . Their effect was additive. Different thresholds indicated distinct YG and UV receptor systems. Blue light alone did not stimulate alightment, and was strongly alightment-inhibitory in combination both with YG and with UV light. On the basis of the above physiological/behavioural findings, a new alightment formula was drawn up for describing the hamopteran's apparent manner of alightment determining integration of surface reflectance. The flush preference and alightment distributions on the series of artificial surfaces were found to correlate slightly more accurately, on average, as well as more consistently, with the new formula than with previously-available colour parameters. These findings are placed in perspective to the literature, and their possible economic relevance is discussed.
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- Date Issued: 1977
African art and myth
- Authors: Till, C M
- Date: 1977
- Subjects: Art, African , Art and mythology , Mythology, African
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2494 , http://hdl.handle.net/10962/d1013306
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- Date Issued: 1977
An investigation of the relationship between acculturation, n achievement and n affiliation in Owambo
- Authors: Steyn, Daniël Marthinus
- Date: 1977
- Subjects: Ovambo (African people) , Acculturation -- Namibia , Achievement motivation , Affiliation (Psychology)
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3241 , http://hdl.handle.net/10962/d1013295
- Description: The contents of this thesis were mainly determined by the traditional methodological requirements for a thesis of this nature. However a need was felt to include a somewhat expanded survey of the interrelationship between anthropology and psychology. This "need" developed during a review of the above-mentioned interrelationship especially when we found that the historical interaction between these two disciplines had never been followed from the earliest times to the present. Furthermore, although different writers have treated different aspects of this interaction, not one could be found that had treated all the different angles of the relationship. Thus although it is a well known fact that there is a prominent relationship between these two disciplines this was found to be quite inadequately documented. Furthermore, it is usually discussed from either a psychological or an anthropological viewpoint. The hazy view of the interrelationship between these two disciplines is naturally a frustrating situation for any researcher in this field - especially one who would prefer to have a view of the position of his research within the wider panorama of research surrounding it. Intro., p. 1.
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- Date Issued: 1977
Categories of experience amongst the Xhosa : a psychological study
- Authors: Schweitzer, Robert David
- Date: 1977
- Subjects: Xhosa (African people) -- Psychology
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3237 , http://hdl.handle.net/10962/d1013172
- Description: Transcultural studies of psychological states may be seen as falling within two schools, one adopting a position in which universal criteria of "mental health" are assumed, the other a cultural relativist position in which phenomena are understood in terms of the context in which they occur. The present study, in adopting the latter position, examines categories of experience amongst the Xhosa in terms of their meaning within Xhosa cosmology. The thoughts and practices of a Xhosa Iqgira (diviner) were extensively examined using an idiographic approach. This was corroborated by in-depth interviews with his consultees who were undergoing the categories being studied. Three categories, thwasa, phambana and amafufunyana are explicated. Thwasa is seen to be related to the individual- shade communion. Phambana is predominantly related to custom and witchcraft. Amafufunyana is related to disharmonious interpersonal situations within the community. The universalist position, derived from descriptive psychiatry, has often viewed the mental status of amaqgira {diviners) as neurotic or even psychotic. This finding is not supported in the present study. The implications of the research for community mental health in Southern Africa are discussed.
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- Date Issued: 1977
The early history of Blythswood Missionary Institution
- Authors: Rodger, Alastair
- Date: 1977
- Subjects: Blythswood Missionary Institution -- History
- Language: English
- Type: Thesis , Masters , BDiv
- Identifier: vital:1269 , http://hdl.handle.net/10962/d1013075
- Description: The Mfengu, or Fingos, of the Transkei were a mixed group of refugees. Originally driven from Natal during the Mfecane, they moved into the Transkei and then the Ciskei. In the 1860's some were allowed by the Cape government to settle in an area in the Western Transkei which it had recently seized. The majority of those who moved were opposed to mission work and education. When therefore the government agent for Fingoland, Captain Blyth, and a Free Church of Scotland missionary, Richard Ross, gained the support of a few headmen for an educational Institution in the Transkei, and approached Dr James Stewart of Lovedale to found such an Institution on the lines of Lovedale, they had very slender support. Mfengu subscribe £10.00 towards the cost. Stewart agreed on condition the support for this somewhat startling and, to some, unpalatable request was gained mainly because it was known that the government intended introducing a hut tax which would be far more onerous than the levy which, it was estimated, would be required to find the sum Stewart was asking. Blyth was able to use the agreement to a voluntary levy for an institution to persuade the government to postpone the tax. The Institution was built on a larger scale than had been planned, for the Mfengu made two subscriptions, each larger than the total requested, and Stewart raised money in Scotland.
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- Date Issued: 1977
A comparison between the views of Jonathan Edwards and John Wesley regarding the sovereignty of God
- Authors: Robertson, Alan Charles
- Date: 1977
- Subjects: Edwards, Jonathan, 1703-1758 , Wesley, John, 1703-1791 , Free will and determinism , Predestination -- History of doctrines , God -- Omniscience -- History of doctrines , Atonement
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1268 , http://hdl.handle.net/10962/d1013067
- Description: The views of Edwards and Wesley regarding the sovereignty of God present a puzzle. On the face of things, both were successful evangelists while both held contrary doctrines of sovereignty. Does this mean that the doctrine of sovereignty is irrelevant? This thesis argues that the doctrine of sovereignty is crucial in evangelism and revival, and that the views of Edwards and Wesley regarding the sovereignity of God were in fact very similar. A useful framework for showing this is the Five Points of Calvinism, as well as the doctrines of justification by faith and the omnipotence of God.
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- Date Issued: 1977
Studies on the completely mixed activated sludge treatment of fellmongery and tannery lime-sulphide effluents
- Authors: Rawlings, Douglas Eric
- Date: 1977
- Subjects: Tanneries -- Waste disposal , Sewage sludge -- South Africa -- Management , Sewage -- Purificiation -- Biological treatment , Water quality management -- South Africa , Water -- Purification -- Biological treatment -- South Africa
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4112 , http://hdl.handle.net/10962/d1013052
- Description: Industries producing highly polluted waste waters are having to purify their effluents to meet with ever increasing requirements laid down by water authorities. The South African Water Act of 1956 has prescribed a very high standard to which waste waters must conform before discharge into a South African water course. Enforcement of these standards falls under the jurisdiction of government authorities such as the Department of Water Affairs. Similarly, municipalities and other local authorities set standards with which trade effluents must comply before discharge into public sewers for treatment in a municipal sewage works. These local authorities are empowered to recover from the trader the additional costs incurred in treating trade effluents. Costs are usually levied in respect of volume, oxygen demand, settleable solids and the production of secondary sludge. In recent years, these standards have been enforced to an extent where the survival of several industries has become dependant on whether these industries are able to purify or dispose of their effluents in a manner acceptable to the water authorities. Chap. 1, p. 1.
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- Date Issued: 1977
Death and transcendence in northern European art
- Authors: Pratt, S R
- Date: 1977
- Subjects: Death in art , Art -- Europe, Northern
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2505 , http://hdl.handle.net/10962/d1015230
- Description: [From Introduction]. Time has revealed two distinct tendencies in the history of thought and art in Europe. That development in European culture which began in Ancient Greece is marked by a positive confidence in the relationship of man to his world. Parallel with but in opposition to this development is a separate progression in culture. The continuity of art in Northern Europe appears to be associated with the adherence of Northern man to a negative, fatalistic sense of being - to a spirit which is in conflict with a hostile violent environment. The purposo of this investigation is to determine, through art the nature of this sense of being in Northern Europe. No direct definition would be capable of conveying the fullest meaning of that spirit. lt is a feeling. To understand this morbid fatalism, it is therefore necessary to refer to the pre-Christian religion of the Germanic Barbarians - through which the Northern spirit manifested itself in the form of ragnarök. Ragnarök which can be translated as a moaning obscurity, shadows, twilight, fateful destiny, was a term used by Nordic bards in its broadest sense to describe the end of the world - the inevitable destruction of life.
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- Date Issued: 1977
A history of the Xhosa, c1700-1835
- Authors: Peires, J B (Jeffrey B)
- Date: 1977
- Subjects: Xhosa (African people) -- History
- Language: English
- Type: text , Thesis , Masters , MA
- Identifier: vital:2611 , http://hdl.handle.net/10962/d1013024
- Description: The boundaries of the territory occupied by the Xhosa fluctuated considerably, but in the period 1700-1835 they did not often extend west of the Sundays River, or east of the Mbashe River, along the coastal strip which separates the escarpment of South Africa's inland plateau from the Indian Ocean. It is an area of temperate grassland, permitting the cultivation of cereals and light crops, such as maize, millet, tobacco and pumpkins but better suited to stock-farming than intensive agriculture.
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- Date Issued: 1977
The holy spirit in the theology of St. Luke
- Authors: Paterson, Torquil
- Date: 1977
- Subjects: Bible. Luke -- Criticism, interpretation, etc. , Holy Spirit -- Biblical teaching
- Language: English
- Type: Thesis , Bachelor , BDiv
- Identifier: vital:1265 , http://hdl.handle.net/10962/d1013007
- Description: The essay consists of five main chapters with an introduction and conclusion. This defines the limits of the essay and explains the methodology employed. These chapters are examined particularly with reference to the Spirit as the agent of fulfillment of the old, and the inaugurator of the new. 'The main text examined is Lk. 1.35. The Spirit is shown to be also used in a skillful linking and differentiation of John the Baptist and Jesus. Through a fairly detailed synoptic comparison, the peculiarly Lukan emphasis is brought to light. The Baptism is linked with 1.35 and the Transfiguration. Again both the Baptism and Temptation are shown to be seen in the light of the fulfillment of the Old Covenant. All the lines of fulfilment join together in the Spirit's descent on Jesus. The immediate result of this is the testing of his Messiahship, and Proclamation in the synagogue of Nazareth. This proclamation is coupled with the Luken rejection motif. The Spirit is seen to be especially involved in Jesus' ministries of exorcism and healing, but also in his preaching and teaching. The position of Lk 4.18-19 is seen to be of great importance. The main problem is the lack of specific reference to the Spirit. This is resolved in similar fashion to the question of the Messianic Secret. The relation of the apostles to the spirit is also discussed, since this is relevant to the ministry of the Church. Firstly the relation between the Transfiguration and Ascension is examined. This points to the fundamental centrality of the Ascension in Luke's theology. Pentecost is then seen as the fulfilling of the Ascension in the Church. Secondly, as a minor theme, the resurrection appearances are looked into and the similarities with Johannine thought are noted. This raises the question of the historicity of the Lukan schematization. In the examination of Pentecost itself the problem of the quotation from Joel and also the relation of Pentecost to the founding of the Church and the Gentile mission are raised. The Spirit is revealed to be active in two main areas : (1) the mission of the Church in evangelization - this is especialy seen in the areas of preaching, miracles and the life of the Church ; (2) the establishing and justification of the Gentile mission - this overriding concern is shown to obscure the other functions of the Spirit especially in the realm of Baptism and the Christian life of the individual. Thus Luke's historical sense is seen to be coupled with a theological desire to justify and bolster the Gentile mission. This draws out the various conclusions within the essay. The question of 'salvation-history' is raised and a solution found in terms of Luke's use of the Spirit. In broad outline the schema of Conzelmann is accepted. The Lukan eschatology is mentioned in an attempt to find a solution to questions raised by the comparison of Luke with Paul and John. This comparison is only meant to place the main conclusions of the essay within the context of the wider New Testament.
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- Date Issued: 1977
An ideographic study of bisexuality
- Authors: Parker, Peter Burns
- Date: 1977
- Subjects: Bisexuality -- Psychological aspects
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3036 , http://hdl.handle.net/10962/d1002545 , Bisexuality -- Psychological aspects
- Description: This research can be seen as being a step towards an answer to the question "what is bisexuality?". Such an aim, however, appears to be a contradiction in terms. Surely we must be assuming an answer by asking the question. How can one ask a question such as “what is bisexuality?", if we have no conception of what the word bisexuality means? Owing to the lack of information in the literature with which to answer the question of this study, it was decided that an in-depth study of one individual would be a most suitable starting point to begin an illumination of the themes which lie in the depths of this complex phenomenon . An in-depth study would hopefully do this without lapsing into the stereo - typed ways of thinking and terminology that could eventuate from a more populous and necessarily more superficial approach (Kotze 1974). Arising out of the prevailing conception of human sexuality as comprising two modes of sexual existence - heterosexuality and homosexuality only, the idea of bisexuality is hardly to be found in the ordinary man's or, for that matter, the psychologist 's, conceptual frameworks. The only extensive work that has been undertaken to date which uncovers, to a certain extent, the nature of human sexuality, is that of Kingsley (1948 and 1953). Although it must be kept in mind that this research is dated, it certainly does indicate that perhaps it would not be unrealistic to begin to reconceptualise our views on man's sexual mode of existence . This thesis presents the case of a man, who, according to our present view, does not exist.
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- Date Issued: 1977
Conscientious objection and the concept of worship
- Authors: Moulder, James Edward
- Date: 1977
- Subjects: Conscientious objectors -- Law and legislation -- South Africa , Conscientious objectors -- South Africa , Conscientious objection , Conscientious objection -- Religious aspects
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:2749 , http://hdl.handle.net/10962/d1013555
- Description: [Preface] " ... the focus of this inquiry is limited to some of the connections between conscientious objection in South Africa and the worship and imitation of Christ. More specifically, at the most general level this essay is an attempt to explore six questions: What kind of conscientious objection does South African law allow? Why are some conscientious objectors only conscientious noncombatants? Why are some Christians conscientious noncombatants? Is it appropriate to worship Christ? Does Romans 13 undermine conscientious noncompliance? And is there a prescription for servile compliance? These are, however, not the only questions which are raised in this essay. Nor are they the only questions which can and need to be asked. But they are the questions which interest me. In addition, they have not received as much attention as they deserve".
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- Date Issued: 1977
The polysaccharides of Opuntia ficus-indica (L.) Mill. and Opuntia aurantiaca Lindl.
- Authors: McGarvie, Donald
- Date: 1977
- Subjects: Polysaccharides
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4438 , http://hdl.handle.net/10962/d1007597
- Description: The partially acetylated acidic mucilage isolated from the cactus Opuntia ficus-indica consists of a highly branched molecule containing D-galactose, L-arabinose, D-xylose, D-galacturonic acid and L-rhamnose in the ratio 2.9:6.6:3.8:1.3 : 1.0. A partial hydrolysis study led to the isolation of fourteen oligosaccharides and a degraded polysaccharide. Periodate oxidation of the degraded polysaccharide and methylation analysis of the degraded and reduced degraded polysaccharides led to the proposal of a structure for the degraded polysaccharide consisting of a chain of alternating α-l,4-D-galactopyranosyluronic acid and β-1,2-Lrhamnopyranosyl units with branches consisting of short chains of β-1,6-D-galactopyranosyl units Iinked to C-3 of the rhamnose residues. An insight into the nature of the peripheral side-chains was obtained by methylation studies of the oligosaccharides and the native polysaccharide. The majority of the side-chains are terminated by D-xylopyranosyl and L-arabinofuranosyl units while there is a small proportion of D-galactopyranosyl end-groups. The remaining units of the peripheral chains consists of mainly 1,3- and 1,5-1 inked L-arabinofuranosyl units. The acidic polysaccharide isolated from the jointed cactus Opuntia aurantiaca contains D-galactose, L-arabinose, D-xylose, D-galacturonic acid and L-rhamnose in the ratio 5.9:5 .5:3.4: 1. 2:1.0 . A partial hydrolysis study revealed a similar series of galactose containing oligosaccharides as was identified from the mucilage of Opuntia ficus-indica. The degraded polysaccharide isolated from the partial hydrolysate was methylated and a possible structure proposed for the repeating unit. Methylation studies of the native polysaccharide indicated a polysaccharide with a more complex structure than that for the mucilage of Opuntia ficus-indica.
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- Date Issued: 1977
The effect of perceptual skill of RFT scores : a cross-cultural study
- Authors: Marais, W F
- Date: 1977
- Subjects: Witkin, Herman A , Personality , Personality and culture -- Cross-cultural studies , Cross-cultural studies , Perception
- Language: English
- Type: Thesis , Masters , MSocSc
- Identifier: vital:3285 , http://hdl.handle.net/10962/d1012838
- Description: The increasing need to select individuals for tasks suited to their personality make-up, has added to the challenge psychology faces of developing tests which can be applied to subjects from different cultures and environments. Many attempts at such designs litter the history of industrial and cross- cultural personality research. Among those to have survived years of reassessment, is the cognitive style approach developed by Herman Witkin. Intro., p. 1.
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- Date Issued: 1977
An investigation of plant-derived cardiac glycosides as a possible basis for aposematism in the aphidophagous hoverfly Ischiodon aegryptius (Wiedemann) (Diptera: Syrphidae)
- Authors: Malcolm, Stephen Baillie
- Date: 1977
- Subjects: Diptera , Syrphidae , Aphidophagous insects , Predatory animals , Insect-plant relationships , Insect pests -- Biological control , Insects as carriers of disease
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5864 , http://hdl.handle.net/10962/d1012798 , Diptera , Syrphidae , Aphidophagous insects , Predatory animals , Insect-plant relationships , Insect pests -- Biological control , Insects as carriers of disease
- Description: The chemical defences of insects against predators are either passive or aggressive. Passive defence is achieved through crypsis, and aggressive defence is maintained by a conspicuous or 'aposematic' (Poulton, 1890) appearance that advertises some noxious quality of the insect harmful to a predator. Aposematism is mutually beneficial to both the bearer and its predator, whereas crypsis only benefits the prey species. It is therefore not surprising that the fascinating array of chemical defences in insects is both diverse and widespread (Roth and Eisner, 1962). Intro. p. 1.
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- Date Issued: 1977
Sensory dominance : an experiment across cultures
- Authors: Locke, Hester W
- Date: 1977
- Subjects: Perception -- Testing , Senses and sensation -- Testing , Dominance (Psychology)
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:3214 , http://hdl.handle.net/10962/d1012744
- Description: Physical and intellectual differences in the home environment of Xhosa and White children suggested that the interaction of touch and vision in situations of sensory conflict and the development of dominance may be different in children from these homes. Children aged 5-13 years were tested on apparatus which created a conflict of tactual and visual judgement about the perceived size of the stimulus. Xhosa and White subjects performed similarly except when only tactual judgement was allowed and the Xhosa group were less influenced by touch. The study concludes that for children touch and vision contribute equally to the resolution of sensory conflict when both senses are active in size-judgements and when only one mode is allowed for judging then the resolution is biased towards this mode. This outcome is different from that of experiments with adults and has implications for theories derived from them.
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- Date Issued: 1977
The intensifying vision of evil: the Gothic novel (1764-1820) as a self-contained literary cycle
- Authors: Letellier, Robert Ignatius
- Date: 1977
- Subjects: Gothic revival (Literature) , English fiction -- 18th century -- History and criticism , English fiction -- 19th century -- History and criticism
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2274 , http://hdl.handle.net/10962/d1006920 , Gothic revival (Literature) , English fiction -- 18th century -- History and criticism , English fiction -- 19th century -- History and criticism
- Description: The purpose of this study is to investigate the Gothic novel, a much neglected and misunderstood school, as a unified literary cycle. Attention has been centred on the domains or sub-systems of the novel where cultural models and generic traits are particularly important and distinguishable: character, plot (with the necessary evocation of a fictional world), theme and symbol. No apology is offered for the many quotations: far too little recourse is made to the texts in most discussions of the Gothic novel and this has all too frequently led to misapprehensions and unfounded generalizations. The opening section places the genre in a historio-literary context, and centres attention on the major novels, while the final section opens additional perspectives on the cycle, suggests the importance of the Gothic school for modern times, and illustrates the inevitability of its central vision of evil.
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- Date Issued: 1977
Precipitation effects on atmospheric electron densities
- Authors: Huang, Cheryl Yu-Yin
- Date: 1977
- Subjects: Precipitation (Chemistry)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5527 , http://hdl.handle.net/10962/d1012441 , Precipitation (Chemistry)
- Description: In this thesis the effects of precipitated electrons on electron densities in the upper atmosphere are investigated. A method for solving the continuity equation has been developed , and this has been used to calculate electron density profiles under various conditions: daytime equilibrium conditions, with and without additional ionization by precipitated electrons; and nighttime conditions, with and without precinitation . This preliminary study seems to show that certain effects may be attributable to precipitation, and that these effects may be significant at night.
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- Date Issued: 1977
Art and power : an investigation into the effect politics, the church and economics have had on the content of a work of art and the development of art in general
- Authors: Heydenrych, Albert B
- Date: 1977
- Subjects: Art and religion , Politics in art , Art and industry , Art and state
- Language: English
- Type: Thesis , Masters , MFA
- Identifier: vital:2499 , http://hdl.handle.net/10962/d1013390
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- Date Issued: 1977