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Farm labour in the Eastern Cape, 1950-1973:

- Antrobus, Geoffrey G

Authors: Antrobus, Geoffrey G
Date: 1976
Language: English
Type: text , article
Identifier: http://hdl.handle.net/10962/142850 , vital:38123 , http://opensaldru.uct.ac.za/bitstream/handle/11090/465/1976_antrobus_sflcp20.pdf?sequence=1
Description: The purpose of this paper is to, survey the farm labour conditions in the Eastern Cape over approximately two decades and to note some of the conditions of service and the attitudes of employers, and the changes which have occurred in employment and wages paid. The main source for the latter period, and in particular 1973, is a farm labour survey conducted in conjunction with E.A. Thomson in the Eastern Cape. The survey relied entirely on the willingness of members of farm study groups and Farmers' Associations as well as interested individuals for its completion. Of the approximately 1020 pre-coded questionnaires which were posted to farmers throughout the Eastern Cape in June 1973, 303 were returned of which 299 were suitable for analysis.
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Date Issued: 1976

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The influence of abiotic factors on the distribution of Biomphalaria pfeifferi (Krauss, 1848) (Planorbidae: Mollusca) and its lifecycle in South-Eastern Africa

- Appleton, Christopher Charles

Authors: Appleton, Christopher Charles
Date: 1976
Subjects: Schistosomiasis , Mollusks as carriers of disease
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:5835 , http://hdl.handle.net/10962/d1009495 , Schistosomiasis , Mollusks as carriers of disease
Description: Previous studies on the influence of abiotic factors on the distribution of bilharzia intermediate host snails of the family Planorbidae are reviewed. Much of this work is basically descriptive and relatively few attempts have been made to examine the effects of these factors on snails in their natural habitats - to identify the factors precisely and to measure their critical levels. An account is given of recent studies on Eiomphalaria pfeifferi (Krauss) in two climatically different regions of southeastern Africa, at 6S5m altitude on the eastern Transvaal escarpment and 19m on the coastal peneplain of northern Zululand. These have shown the species to undergo a similar annual life-cycle of three overlapping generations in both areas. Further, in these areas where the snail has a discontinuous distribution, two abiotic factors, stream geology and water temperature, were found to be important in limiting its distribution. The longitudinal distribution of B. pfeifferi and another host snail Bulinus (Physopsis) globosus (Morelat), extended upstream in a perennial watercourse, the Gladdespruit, on the escarpment only as far as permanently lentic habitats were available. These habitats, usually detached from the channel, characterized the stream's lowest physical zone with its substratum of exposed granite, as opposed to the sandy-bottomed lotic zones upstream. The limit of the snails' occurrence lay close to the junction of these two substratum types. Granite is resistant to erosion but contains soft inclusions which erode more quickly than the hard matrix causing uneven weathering. This results in the formation of depressions in the stream bed (i.e. pools, potholes and backwaters) which provide the permanently lentic conditions necessary for the snails' survival. Temperature recordings made on this plain, upstream of the snails' limit, suggest that the water temperature here exceeded the critical lower levels required for a positive intrinsic rate of natural increase sufficiently often to permit the species to survive here, though not optimally. Above this point however, current velocities are continually in excess of the maximum tolerated (0.3 m/sec.) so that in this situation at least, current velocity is a dominant factor. A contrasting situation exists on the coastal peneplain of northern Zululand where B. pfeifferi occurs in some lentic habitats and not in others. This discontinuous distribution is shown to be related to the prolonged duration of temperatures above the level for optimal increase. The apparently suitable habitats from which B. pfeifferi was absent were found to be both very shallow and to experience these prolonged high temperatures during spring and early summer. This corresponds to the maturation period of the B. pfeifferi 1st generation as defined by Appleton (1974) and causes reduced fecundity probably through impaired gonad development. The density of its filial (2nd) generation is correspondingly reduced. A statistically significant partial-correlation (at a 1% level) was found between the fecundity of the 1st generation and increasing periods of temperatures above the species' optimal limit in the habitats involved during its maturation period (spring). It is interesting to nate here that B. (Ph.) globosus, which is known to be better adapted to high temperatures than B. pfeifferi (Shiff & Husting, 1966) occurred in all the waterbodies concerned. Both these factors therefore play important roles in determining the country-wide distribution pattern of the host snails. This distribution is closely correlated with the availability of permanently lentic habitats. In river systems, which form the main environment for these snails, such stable habitats occur almost entirely in low-gradient reaches over hard bed-rock which is resistant to erosion. Current velocities above 0.3 m/sec. render steeper reaches and those over soft, non-resistant rock and sand (unstable substrata) unsuitable and therefore constitute a most important limiting factor. Temperature however becomes a dominant factor in permanently lentic waterbodies. Biomphalaria pfeifferi is adversely affected by high temperature regimes and where such regimes occur in waterbodies which are too shallow to permit temperature gradient to develop, the species cannot survive whereas B. (Ph.) globosus can do so. This intolerance of high temperature regimes on the part of B. pfeifferi accounts for the species' adoption of a discontinuous distribution over the coastal plain of south-eastern Africa. A comparable pattern has been reported for the species over this plain northwards to approximately 16°S latitude in Mozambique and is probably due to a similar high-temperature effect. Further northwards in equatorial latitudes B. pfeifferi is restricted to the more elevated and cooler areas above an altitude of 500 - 600 m, probably because the very high temperature regimes prevailing in the lowlands there exclude the species altogether.
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Date Issued: 1976

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Chris McGregor

- Atkins, Ronald

Authors: Atkins, Ronald
Subjects: McGregor, Chris -- 1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group) , Parker, Evan , Dean, Elton , Moholo, Louis T. -- 1940- , Pukwana, Dudu
Language: English
Type: Article
Identifier: vital:13476 , http://hdl.handle.net/10962/d1001398 , McGregor, Chris -- 1936-1990 , Jazz , Jazz musicians , Brotherhood of Breath (Musical group) , Parker, Evan , Dean, Elton , Moholo, Louis T. -- 1940- , Pukwana, Dudu
Description: Photocopied article about a concert at QEH (Queen Elizabeth Hall) in London, England, by Chris McGregor and the Brotherhood of Breath.
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Bacterial degradation of the acaricide amitraz

- Baker, Penelope Bridget

Authors: Baker, Penelope Bridget
Date: 1976
Subjects: Acaricides , Biodegradation , Gas chromatography , Bacteriology -- Cultures and culture media
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:4099 , http://hdl.handle.net/10962/d1009498
Description: This thesis describes dip tank field trials and laboratory investigations on the acaricide Amitraz. Amitraz is a triazapenta- diene compound which is relatively unstable in fouled dip washes. The field trials were conducted on the farm Sea View according to the "Total Replacement Method" and on the farm Sea Ways according to the "Lime Stabilization Method" of dipping. The results of these trials showed that Amitraz was stable in clean dip washes, and under conditions of high pH resulting from the addition of slaked lime to the dip wash. Using mixed bacterial populations optimum conditions for degradation of Amitraz in the laboratory were determined. Bacterial cultures degraded Amitraz most efficiently in media supplemented with yeast extract or with a high content of sterile cattle faeces. Amitraz concentrations were determined by gas chromatography. A culture. efficient at degrading Amitraz was enriched from a dip tank sludge inoculum. From this culture ten bacterial isolates were identified; nine of these were of the genus Pseudomonas and one was an Achromobacter sp. Experiments with both mixed and pure cultures demonstrated that bacterial degradation of Amitraz was by the process of co-metabolism. The existence of four degradation products was shown using thin layer chromatography. Tentative identification of two of the products was made.
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Date Issued: 1976

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Feeding ecology of the cichlid fish Sarotherodon Mossambicus in Lake Sibaya, KwaZulu

- Bowen, Stephen H

Authors: Bowen, Stephen H
Date: 1977
Subjects: Cichlids -- Ecology , Fishes -- Ecology -- South Africa -- KwaZulu-Natal -- Sibaya, Lake
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:5837 , http://hdl.handle.net/10962/d1009688 , Cichlids -- Ecology , Fishes -- Ecology -- South Africa -- KwaZulu-Natal -- Sibaya, Lake
Description: The feeding of the cichlid fish Sarotherodon mossambicus in Lake Sibaya, KwaZulu, was studied in relation to various biotic and abiotic features of the l ake environment from January, 1973 to July, 1975. The primary goal of the study was to determine the cause of stunting and poor condition of adults in this population. Juvenile and adult S. mossambicus feed on a mixture of detritus, bacteria and diatoms that occurs as a flocculent layer on sand substrates throughout the lake. Concentrated gastric acid, commonly at pH values of 1.5 and lower, lyses diatoms and bacteria which are subsequently digested in the intestine. This is the first report of digestion of bacteria by a fish, and the nutritional significance of the finding is discussed. Juveniles feed predominantly on shallow sand terraces found along the margin of much of the lake, while adults usually feed in offshore waters at depths of 3 m and greater. Benthic floc from feeding areas of juveniles and adults have similar concentrations of organic matter, total carbohydrate, soluble carbohydrate and calories, but differ markedly in respect to diatom and protein concentration. Diatom concentrations are generally high in terrace floc but are consistently low in floc from deep water. Protein concentration of benthic floc decreases with increasing depth from 0 - 5 m. Partial correlation analysis shows that protein and diatom concentrations have no correlation independent. of their common relationship to depth, and the evidence implicates detrital bacteria as the primary source of protein in benthic floc. Probable causes of the observed distributions of diatoms and protein are discussed. The protein content of benthic floc profoundly influences its nutritional value. A comparison with available data on animal nutrition shows that the ratio of digestible protein to digestible energy in floc in the shallows is high enough that this food resource would be expected to support good growth, but the ratio for deep water floc is so low that it would be expected to result in conspicuous malnutrition. Thus, inadequate dietary protein is identified as the principal cause of stunting and poor condition of adult S· mossambicus in Lake Sibaya; It is argued that the ratio of digestible protein to digestible calories can be expected to determine the food value of particulate organic matter that includes amorphous detritus in other ecosystems. Despite stunting and poor condition of adults, S. mossambicus are abundant in Lake Sibaya. The precocious breeding of this population is discussed as an adaptation that allows it to maximize reproductive output given the limited resources available to adults. Juvenile S. mossambicus perform daily movements from deep water onto the terraces where they feed and then back into deep water. During periods of relatively low lake level when terrace waters were usually less than 1.5 m deep (1-73 to 1-74), juveniles were present on the terrace throughout daylight hours. At relatively high lake levels (7-74 to 8-75), juveniles were present on the terraces for only about five hours following sunset. Periods of heavy wave action interrupt feeding activity and result in reduced numbers of fish in terrace waters. The possible roles of predator avoidance and temperature in determination of daily feeding behavior are discussed. Daily energy assimilation by juveniles, estimated by a field technique, is approximately 115 cal per g fish dry weight.
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Date Issued: 1977

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Some problems of dialect lexicography with particular reference to the preparation of a draft of an illustrative, experientially categorised Dictionary of South African English

- Branford, Jean

Authors: Branford, Jean
Date: 1976
Subjects: English language -- Provincialisms -- South Africa -- Dictionaries English language -- South Africa English language -- Lexicography -- South Africa
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:3626 , http://hdl.handle.net/10962/d1009689
Description: This dissertation consists in essence of an experiment and a commentary upon it. The text which constitutes Part II is a lexicographical experiment incorporating some features and treatments not usual in lexicography, and Part I consists of a discussion of the problems encountered, principles applied and procedures followed. Neither the matter nor the manner of the experiment, however, lends itself in the present state of our knowledge to the fully impersonal objectivity that is often claimed for the experiments in the physical sciences. At the same time every effort has been made to establish an unbiased record of the data and to maintain a certain methodological consistency. The main experimental feature of Part II is that it is an attempt to combine an orthodox, alphabetical dictionary with an experiential categorisation of the vocabulary, without repeating the entire data for each type of treatment. This has been done by means of a series of numbered, classified word-lists with a limited subject index as a guide to their use. The entries themselves, instead of being repeated in the order of their classification, are numbered according to the category or categories to which the word defined belongs. It can then, by means of its number(s), be found in its own lexical or experiential set (or sets) in the categorised section. This part of the work might be better described as lexicology rather than lexicography but does, I think, prove itself to be a useful adjunct to the A - Z lexicon proper. Apart from the detailed categorisation system the text contains three features not normally included in dictionaries of small compass: illustrative quotations, etymologies and a number of tentative parallels between South African and other varieties of English by means of cross-references to items of similar or related meaning or form in the English of Australia, Canada, the U.S.A., Hong Kong, Anglo-India and other 'overseas' English speech communities. Introduction, p. 1.
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Date Issued: 1976

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A comparative study of the vocational interests of black and white school-leaving boys in South Africa

- Breger, Richard Allen

Authors: Breger, Richard Allen
Date: 1976
Subjects: Vocational interests -- South Africa , Vocational interests -- Cross-cultural studies
Language: English
Type: Thesis , Masters , MA
Identifier: vital:3200 , http://hdl.handle.net/10962/d1009692 , Vocational interests -- South Africa , Vocational interests -- Cross-cultural studies
Description: This is an exploratory study to compare the vocational interests of Black and White school-leaving boys in South Africa. The aim of the study is, first, to test the hypothesis that the samples hold similar stereotypes of vocations and that they structure interest fields in a similar way; and, second. to test the hypothesis that the vocational interests of the samples are different. The samples comprise four hundred and ten matriculants from schools in Johannesburg and Soweto. The methodological requirements for conducting cross-cultural research are adhered to as far is practically possible. The main findings provide general support for the hypotheses. It is found that the Black and White samples have similar vocational stereotypes and that they structure interest fields similarly, and in a way which closely approximates the reported structures characteristically found in Western culture. The Black and White samples differ in their vocational interests, although there are also similarities.
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Date Issued: 1976

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Aspects of the feeding ecology of three common Sparid fish in the littoral zone at Clayton's Rocks in the Eastern Cape, with notes on their biology

- Christensen, Mikkel S

Authors: Christensen, Mikkel S
Date: 1976
Subjects: Sparidae -- Physiology , Sparidae -- Ecology
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:5356 , http://hdl.handle.net/10962/d1010476 , Sparidae -- Physiology , Sparidae -- Ecology
Description: The feeding interrelationships of three sparid fish was studied in the littoral zone during low tide at Clayton's Rocks in the Eastern Cape. The three species appeared in the study area only when between 9 and 10 mm long (SL), and remained resident until a length of approximately 120 fmm was reached. No sexually mature specimens occurred in the study area as large adults only use the intertidal zone for feeding purposes at high tide. From first recruitment into the littoral zone at 9 mm SL until some 35 mm long, the diet of Diplodus sargus consists of harpacticoid copepods and amphipods. Ingestion of amphipods and green algae increases with increased size of fish. Chironomid larvae, cirripede nauplii and an unidentifiable planktonic larva are important food items of small juveniles ( 50 mm), while diatoms are significant in larger juveniles (25 to 80 mm) in the spring/early summer season. The gut is short and the teeth are incisiform, backed by several rows of molars which increase in size and number with age. D.cervinus was almost completely carnivorous in the size range studied. The juveniles found on harpacticoid copepods and chironomid larvae while between 10 and 20 mm long. The diet then consists mainly of the shrimp Palaemon pacificus until the fish are 50 mm long and then amphipods until 100 mm long. All fish larger than this feed prodominantly on polychaetes. The gut is short and the teeth are similar to those of Q. sargus although there are fewer molars. From its first appearance at 10 mm, Sarpa salpa feeds mainly on harpacticoid copepods until 25 mm long. Diatoms then predominate in the diet, red algae also being taken until 75 mm long. Larger size classes are herbivores, feeding almost equally on red and green algae. Corresponding changes in gut length and dentition are reported, juveniles having a short gut and conical teeth and adults a long intestine and cuspidate, incisiform teeth. Marked ecological separation was observed between the three species. Spatial, temporal , behavioural and dietary differences were found . Q. sargus has continuous recruitment of juveniles into the littoral zone, S..salpa appears between July and early September and Q.cervinus is recruited from late September to November. Competition between small juveniles is reduced by cyclic abundances of food items important to each species and the sub-adults feed on different foods. Some competition exists between large juveniles of Q. sargus and Q.cervinus, but separation is maintained as individuals of the two species feed at different levels of the water column and in different parts of the littoral zone.
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Date Issued: 1976

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Grazing sequence pattern and species selection by cattle in the Dohne sourveld

- Daines, Thomas

Authors: Daines, Thomas
Date: 1976
Subjects: Grasses -- Research -- South Africa -- Cape of Good Hope , Grasses -- South Africa -- Cape of Good Hope -- Identification , Grazing -- South Africa
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:4257 , http://hdl.handle.net/10962/d1010955
Description: A detailed investigation into the harvesting of the standing grass crop within camps by cattle showed the following: 1. Cattle have a definite order of preference for the components of the Dohne Sourveld grass sward. The most palatable species in order of preference (based on Corrected Species Importance rating) are Themeda triandra, Tristachya hispida, Andropogon appendiculatus, Alloteropsis semialata and Heteropogon contortus. The least preferred species is Elionurus argenteus. 2. The key species, which is defined as the most abundant and productive palatable species, has been identified as Themeda triandra. 3. In harvesting the grass crop, cattle not only have a set preference for species, but also have a set grazing sequence pattern. This can be divided into three main phases. On entering the camp the animals first select the species of their choice, "creaming" these plants (grazed less than 50%) to obtain the most nutritious feed. In their daily search for food they spread their grazing over an increasingly wider area and over a wider range of species. When they can no longer obtain their daily requirements from this "creaming" operation of the more preferred species they return to the most preferred species , which are then heavily grazed (more than 50%) producing the common pattern of area grazing within a camp. These areas increase in size as the cattle graze down the species of their choice, moving to less preferred species as soon as they can no longer obtain their daily intake requirements from the more preferred species. Finally when they have no alternative they graze the least preferred species. 4. Increasing the stocking density does not alter the grazing sequence pattern or change the order of preference for the component species in the sward. It only increases the rate of utilization of the more preferred species and the various phases in the grazing sequence pattern are reached more rapidly. 5. At higher stocking densities the palatable species are more evenly utilized than at lower stocking densities. 6. Cattle graze a greater variety of species when the sward is young and actively growing. As the maturity of the sward increases the cattle concentrate on the more preferred species and are more selective in their grazing. However, their order of preference remains the same. Species that are highly preferred early in the season retain their ranking when the sward is mature. The only exception to this rule is Alloteropsis semialata. Early in the growing season this species is high on the preference list, but as it matures less is taken until when fully mature, it is rejected by cattle. 7. Elionurus argenteus is the least preferred of all the species in the Dohne Sourveld. Cattle will graze this plant as a last resort when grazing a camp early in the season, but reject the plant when it is fully mature. 8. To retain vigour and production of the Dohne Sourveld results of this investigation support the view that grazing management should be based on the principle of controlled selective grazing. Having shown that the more preferred species are over-utilized when attempting to utilize the least preferred species any grazing management that calls for total utilization of all standing vegetation should be rejected. 9. The results of this investigation supports a multicamp system for the Dohne Sourveld where high stocking densities are employed. This will result in the rapid and even utilization of the more preferred species. Management should be based on short period of stay and long period of absence. Cattle should be moved as soon as the key species have been well utilized, but not overgrazed. Cattle should only be returned to the camp when key species have made adequate regrowth following grazing. 10. A method, that is simple to use, is proposed for determining utilization of the veld and key species at different times of the year using the relationship between percentage of ungrazed plants and utilization of the sward and of Themeda triandra, the key grazing species in the sward. 11. Results show that when rested camps are grazed after May, the number of Themeda triandra inflorescences are drastically reduced. Veld that is specifically rested for the production of Themeda triandra seed should be rested from March of the year preceding expected seeding.
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Date Issued: 1976

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The term structure of interest rates in South Africa

- Dollery, Brian

Authors: Dollery, Brian
Date: 1976
Subjects: Interest rates -- South Africa
Language: English
Type: Thesis , Masters , MA
Identifier: vital:1083 , http://hdl.handle.net/10962/d1011180 , Interest rates -- South Africa
Description: Since the late ' fifties the term structure of interest rates has attracted considerable attention from both theoretical and empirical economists. While potentially a very fruitful area for the application of the traditional methods of economic enquiry, the term structure has proved itself to be a potent testing ground for these tools, and consequently a wide range of sophisticated analytic devices have been introduced, Despite this, no general agreement has yet been reached and a number of crucial questions remain unanswered. It is our task in this dissertation to extend the enquiry into the South African context in an attempt to shed some light on the determination of the term structure of interest rates. Intro., p. 1.
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Date Issued: 1976

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Geology of the Elisenheim area, Windhoek district, South West Africa, with special reference to the Matchless amphibolite belt

- Finnemore, S H

Authors: Finnemore, S H
Date: 1976
Subjects: Matchless Copper Mine (Namibia) , Geology, Structural -- Namibia , Amphibolite -- Namibia , Geology -- Namibia
Language: English
Type: Thesis , Masters , MSc
Identifier: vital:5053 , http://hdl.handle.net/10962/d1011864
Description: The Elisenheim area is situated just north of Windhoek within the Windhoek Formation of the Swakop Subgroup and is underlain by monotonous succession of semi-pelitic schists with intercalations of amphibolite, talc schist, graphitic schist and marble. Petrographic studies on units of the Matchless amphibolite which outcrop in the south of the property, have resulted in the recognition of three different types of amphibolite, namely, epidote amphibolite, porphyroblastic amphibolite and chlorite-amphibole schist. Amphibole porphyroblasts generally display patchy and zonal intergrowths of hornblende and actinolite which are indicative of non-equilibration during prograde metamorphism. Talc schists have been mapped in the north of the property. All lithotypes have undergone three phases of deformation (Fl, FZ, F3) which terminated with the faulting which underlies the Klein Windhoek, Dobra, Tigenschlücht and Kuruma rivers. Medium grade regional metamorphism accompanied F 1, F Z and F 3 and outlasted the latter. Mineral assemblages throughout the area are those of the amphibolite facies and P, T conditions prevailing during metamorphism are estimated to have been at least 5 kb at ~ 550° C. Petrochemical evidence indicates that the Matchless amphibolites are igneous in origin and genetically related to the ultrabasic talc schists. They are similar in composition to oceanic tholeiites and are thought to have been extruded subaqueously.
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Date Issued: 1976

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The vocation of man and the Great Commission: a theological dissertation based on the doctrine of reconciliation in Karl Barth's Church Dogmatics

- Fourie, Ethne Maud

Authors: Fourie, Ethne Maud
Date: 1976
Subjects: Barth, Karl., 1886-1968 Theology, Doctrinal Great Commission (Bible) Reconciliation -- Biblical teaching
Language: English
Type: Thesis , Bachelor , BDiv
Identifier: vital:1252 , http://hdl.handle.net/10962/d1011870
Description: The purpose of this thesis is to establish a theological basis for an ecclesiology which takes account of the claim which the Lordship of Jesus Christ asserts over his appointed servants and the appropriate response from the Christian community corporately and from the members of the community individually. The interpretation and application of Christian discipleship by liturgical acts of the community in which the individual members participate and are prepared, trained and nourished for the purpose of equipping them for their corporate and individual task of witness is based on the promise and command of Jesus Christ recorded in Acts 1:8. The theological interpretation of the key concepts of the promise of power in the Holy Spirit and the commission to witness in the world is based on the theology of Karl Barth. Chapter I outlines the immediate context of the doctrine of vocation and the sending of the Christian community and the wider context of the doctrine of reconciliation and its place in the whole of theology. Chapters II and III enlarge on the vocation of man and the sending of the Christian community in the power of the Holy Spirit as the two parts of the doctrine of reconciliation which have particular relevance for our interpretation of the great commission. Chapter IV is devoted to a hypothesis of a special ethic based on Barth's unfinished work and Appendix A to methodological outline. Appendix B considers the practicality of this hypothesis in the light of two contemporary ecumenical interpretations and applications of the great commission. A concluding critique recognises the problems of the hypothesis and the inevitable problems that arise from any attempt to formulate a system or to define in precise categories the unique event of God's free and gracious love poured out and given to us in his Son, Jesus Christ our Lord.
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Date Issued: 1976

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5-hydroxytryptamine and sexual behaviour in rhesus monkeys

- Gradwell, Peter Bertram

Authors: Gradwell, Peter Bertram
Date: 1976
Subjects: Rhesus monkey -- Behavior Sexual behavior in animals
Language: English
Type: Thesis , Doctoral , PhD
Identifier: vital:3210 , http://hdl.handle.net/10962/d1012086
Description: Selective inhibition of 5-hydroxytryptamine by parachlorophenylalanine (PCPA) is able to restore sexual receptivity in female rhesus monkeys made unreceptive by bilateral adrenalectomy. PCPA in the doses used reduces the levels of 5-hydroxyindoleacetic acid (5HIAA) in the cerebrospinal fluid to 40 per cent of the normal oestradioltreated condition. Both the increased sexual receptivity and the lowered 5HIAA levels "in the CSF are in turn reversed by 5-hydroxytryptophal (5HTP), the irrmediate precursor of 5HT and the substance whose synthesis is inhibited by PCPA. 5HTP on its own reduces sexual receptivity and increases 5HIAA levels in the CSF of ovariectomised, oestradiol-treated (but otherwise intact) female rhesus monkeys. A substance other than an adrenal androgen has therefore been shown to restore sexual receptivity in adrenalectomised female monkeys . Testosterone propionate and oestradiol benzoate both lower the turnover rates of 5HT in the brains of ovariectomised female monkeys, as measured by the 2 hour probenecid test. Taken together, these findings suggest that adrenal androgens could act on specific sites in the female monkey brain via 5HT-containing neural systems, to control (or at least influence) sexual receptivity. All the results of administering oestradiol to ovariectomised monkeys in these experiments are consistent with the established roles of this hormone in female sexual attractiveness and in the gonadotrophin- controlling systems of the hypothalamo-hypophyseal axis. In contrast to these findings on 5HT and sexual receptivity in female monkeys, no clear role for 5HT- containing neural systems could be demonstrated in the grooming, aggressive or social behaviours of female monkeys. No clear role for 5HT could be demonstrated in the refractory period following ejaculation in male monkeys , or when testosterone replacement is given to castrated male monkeys.
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Date Issued: 1976

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Die administratiewe funksionering van bewindsinstellings in die Ciskei met besondere verwysing na plaaslike bestuur

- Groenewald, David Marais

Authors: Groenewald, David Marais
Date: 1976
Subjects: Public institutions -- Administration -- South Africa -- Ciskei , Public institutions -- Management -- South Africa -- Ciskei , Public institutions -- Government -- South Africa -- Ciskei
Language: Afrikaans
Type: Thesis , Masters , MA
Identifier: vital:2877 , http://hdl.handle.net/10962/d1012099 , Public institutions -- Administration -- South Africa -- Ciskei , Public institutions -- Management -- South Africa -- Ciskei , Public institutions -- Government -- South Africa -- Ciskei
Description: As gevolg van die ongekonsolideerde aard van die Bantoegebiede in die Ciskei is dit onmoontlik om diè gebied te begrens binne bepaalde relief kenmerke, soos bv. berge en riviere; of selfs binne administratiewe grense soos bv. magistraatsdistrikte. Intro., p. 1
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Date Issued: 1976

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The structure of aliphatic amine adducts of uranyl acetylacetonate. I. Dioxobis(2,4-pentanedionato)mono (2-N-methylaminopentan-4-one)uranium(VI)

- Haigh, John M, Nassimbeni, Luigi R, Pauptit, Richard A, Rodgers, Allen L, Sheldrick, George M

Authors: Haigh, John M , Nassimbeni, Luigi R , Pauptit, Richard A , Rodgers, Allen L , Sheldrick, George M
Date: 1976
Subjects: Aliphatic amine adducts , Uranyl acetylacetonate
Language: English
Type: Article , text
Identifier: vital:6373 , http://hdl.handle.net/10962/d1006077
Description: Crystals of the title compound are monoclinic with a= 8.314 (5), b= 22.723 (9), c= 12.589 (6) A, /3= 123.0 (2t, Z=4, space group P2dc. The structure was determined by Patterson and Fourier methods and refined by full-matrix least squares to a final R of 0.030 for 2043 independent reflexions. The U atom has pentagonal bipyramidal coordination and the N-methylacetylacetoneamine is bonded to U via O. There are two intramolecular N-H. . .0 hydrogen bonds which govern the geometry of the adduct molecule.
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Date Issued: 1976

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An account and explanation of the increased role played by women in the modern Olympic games 1896-1972

- Handley, Bridget Mary

Authors: Handley, Bridget Mary
Date: 1976
Subjects: Olympics -- History , Sports for women -- History , Women Olympic athletes
Language: English
Type: Thesis , Masters , MA
Identifier: vital:5150 , http://hdl.handle.net/10962/d1012149 , Olympics -- History , Sports for women -- History , Women Olympic athletes
Description: This thesis is concerned with the participation of women and girls in the Olympic Games. In these days of women's liberation it seemed appropriate to try to put together the knowledge available about women competitors and their participation in the Olympics. I have tried to set out an overall view with some historical background and then an account leading up to the initial and continuing participation of women in the Games and showing the reasons for the slow beginning and the gradual increase in numbers of competitors and sports. I have also tried to evaluate some well known myths and misconceptions concerning participation and made an attempt with the use of research data to disprove many of these.
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Date Issued: 1976

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