Aspects of the biology of Caffrogobius Caffer (Günter) (Pisces : Teleostei : Gobiidae) in the Eastern Cape
- Authors: Butler, Graham Stuart
- Date: 1981
- Subjects: Osteichthyes -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5345 , http://hdl.handle.net/10962/d1006849
- Description: Several strategies used by the gobiid fish Caffrogobius caffer enabling it to colonise the harsh intertidal environment in the eastern Cape were studied. Q. caffer is opportunistic in its use of available food resources and feeds throughout the day with a slight tendency towards crepuscular peaks of feeding activity. The system of space utilisation used by C. caffer is so organised that all individuals of the population have access to patchily distributed food resources. Current velocities occurring over high tide limit the movements of Qo caffer and interpool movements occur only during the initial stages of a rising tide and in the final stages of an ebbing tide when the current velocities are below the tolerance limit of Q. caffer. The epifauna associated with the alga Ulva rigida, which forms an important constituent of the diet of the intermediate size classes of Q. caffer, was examined and it appears that this epifauna is an important source of food to Q. caffer. This report presents the results of the first detailed study of the biology of an intertidal fish in southern Africa.
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- Date Issued: 1981
Bailie's party of 1820 settlers
- Authors: Nash, M D
- Date: 1981
- Subjects: Bailie, John, 1788-1852 , British settlers of 1820 (South Africa) , Cape of Good Hope (South Africa) -- Emigration and immigration , Cape of Good Hope (South Africa) -- History
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2588 , http://hdl.handle.net/10962/d1006907 , Bailie, John, 1788-1852 , British settlers of 1820 (South Africa) , Cape of Good Hope (South Africa) -- Emigration and immigration , Cape of Good Hope (South Africa) -- History
- Description: From preface: This study of the British settlers of 1820 in South Africa uses one party of emigrants as a unit of historical research. In unfolding their story, it attempts to discover how far the standard assumptions about the 1820 settlement are borne out by the historical facts. No systematic set of hypotheses for investigation was established in advance; instead, the structure of the thesis has been determined by the course of the narrative, and the main issues have emerged spontaneously as it has progressed. Although the chronology has been maintained as far as possible, the narrative itself does not follow an entirely straightforward course. The emigrant party of eighty-four men and their families under the leadership of John Bailie which is the subject of the study was officially subdivided five weeks after landing at Algoa Bay, and the dispersal of its members to the established towns of the colony began even sooner. At the end of the three-year period laid down as a residential qualification by Government, less than a third remained to claim land on the party's location in Albany.
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- Date Issued: 1981
Black and white women: a socio-historical study of domestic workers and their employers in the Eastern Cape
- Authors: Cock, Jacklyn
- Date: 1981
- Subjects: Household employees -- South Africa Working class -- South Africa Women, Black -- Employment -- South Africa South Africa -- Race relations
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3287 , http://hdl.handle.net/10962/d1003075
- Description: Domestic service constitutes one of the largest sources of employment for black women in South Africa. Yet it is a largely unstudied occupation. There has been no previous investigation of domestic workers in the Eastern Cape, and to date only two comprehensive studies of domestic workers in other areas of South Africa. This neglect is significant, for such inquiry involves questioning the accepted pattern of inequalities on which the entire social order is based.
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- Date Issued: 1981
Boodskap, vir SAUK uitsending, deur die vise-kanselier oor planne end vooruitsigte vir Rhodes Universiteit in 1981
- Authors: Henderson, Derek Scott
- Date: 1981
- Language: English
- Type: Text
- Identifier: vital:7445 , http://hdl.handle.net/10962/d1018322
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- Date Issued: 1981
Chemistry and the white knight : inaugural lecture delivered at Rhodes University
- Authors: Letcher, T.M.
- Date: 1981
- Subjects: Chemistry, Physical and theoretical
- Language: English
- Type: Text
- Identifier: vital:647 , http://hdl.handle.net/10962/d1020716 , ISBN 0868100749
- Description: Inaugural lecture delivered at Rhodes University , Rhodes University Libraries (Digitisation)
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- Date Issued: 1981
Comparative blanching activities of some topical corticosteroid containing lotions
- Authors: Meyer, I , Kanfer, Isadore , Haigh, John M
- Date: 1981
- Language: English
- Type: Article
- Identifier: vital:6398 , http://hdl.handle.net/10962/d1006324
- Description: The blanching activities of Betnovate and Celestoderm-V lotions (betamethasone-17-valerate, 0,1%) and Diprosone lotion (betamethasone dipropionate, 0,55%) were determined by measuring their ability to cause blanching of human skin after topical application. Betnovate and Celestoderm-V lotions produced almost identical blanching profiles. Diprosone lotion displayed a statistically significant superior blanching acitivity over both Betnovate and Celestoderm-V lotions over the whole timespan of the trial.
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- Date Issued: 1981
Die stedelike informele sektor in die volkshuishouding van die Ciskei
- Authors: Jacobs, François Alwyn
- Date: 1981
- Subjects: Community development -- South Africa -- Ciskei , Urban policy -- South Africa -- Ciskei , Ciskei (South Africa) -- Economic conditions
- Language: Afrikaans
- Type: Thesis , Masters , MCom
- Identifier: vital:1054 , http://hdl.handle.net/10962/d1006876 , Community development -- South Africa -- Ciskei , Urban policy -- South Africa -- Ciskei , Ciskei (South Africa) -- Economic conditions
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- Date Issued: 1981
Freedom and form in the fiction of Doris Lessing
- Authors: Flischman, Rita
- Date: 1981
- Subjects: Lessing, Doris May, 1919- -- Criticism and interpretation
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2269 , http://hdl.handle.net/10962/d1005921 , Lessing, Doris May, 1919- -- Criticism and interpretation
- Description: From Introduction: This thesis then is a detailed study of Lessing's novels in an attempt to show her development as a writer. Her short stories are handled briefly in connection with her novels. For, although the short stories are among her finest work, focus on the novels is sufficient to show her growth as a writer. Hers is the small individual struggle to overcome the limitations of both her content and her form. To overcome the limitations of her content means expanding her own consciousness and re-forming life itself. Only when she is free and the world is free can she overcome the limitations of her content. Then, of course, she need no longer and can no longer write. The task seems as impossible as that of the dung beetles, but she nevertheless continues. Like the sacred beetles with "the sun between their feet" she carries on rolling the muck of the world into symbols of the truth.
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- Date Issued: 1981
Geodynamics, rifting, stratiform and stratabound mineral deposits
- Authors: Dingemans, D.R.W.
- Date: 1981 , 2013-03-19
- Subjects: Ore deposits , Geodynamics , Mines and mineral resources , Rifts (Geology)
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5012 , http://hdl.handle.net/10962/d1006107 , Ore deposits , Geodynamics , Mines and mineral resources , Rifts (Geology)
- Description: Stratiform and stratabound ore deposits commonly show a direct relationship with rifts. This association is studied by developing a geodynamic model of mantle processes and crustal responses. The geodynamics of the earth can be modelled by the process of mantle advection, which involves the episodic generation and segregation of low density mantle diapirs and their rise and subsequent interaction with the crust. The theory of mantle advection explains the genetic association between rifting, magmatism, basin development and subsequent orogeny and metamorphism. Global evolution has passed through a number of major stages of non-uniformitarian development in which each cycle was characterized by fairly uniform behaviour terminated by intense geodynamic upheaval. The relationship between geological evolution and mantle advection is examined by reviewing the major characteristics of each of the cycles, which correspond to the Archean, Early Proterozoic, Mid Proterozoic, Late Proterozoic-Palaeo2oic, and Mesozoic - Cainozoic eras. Although mentle advection has controlled crustal processes throughout time, the decrease in the thermal energy of the earth has caused >the major evolutionary changes in response to thickening and a greater rigidity of the sialic crust. Rifts are penetrative taphrogenic faults in the earths crust which act as major conduits for the transfer of magmas, from the mantle and lower crustal levels, to the upper crust and the surface. Rifts are also permeable zones for the migration of metalliferous brines, generated by magmatic differentiation. These metalliferous brines would either be exhaled at surface to form stratiform volcanogenic and volcanosedimentary ore deposits , or would interact with preferential host horizons to form stratabound ore deposits . The associat ion between rifting and stratiform and stratabound ore deposits is illustrated by examining :he tectonic setting, and st ratigraphic relationships of typical ore deposit types .
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- Date Issued: 1981
Geological factors affecting the grade and tonnage of sandstone uranium deposits
- Authors: Holliman, K A
- Date: 1981 , 2013-03-19
- Subjects: Uranium ores , Sandstone , Geology, Economic
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:5009 , http://hdl.handle.net/10962/d1005914 , Uranium ores , Sandstone , Geology, Economic
- Description: The largest known reserves of uranium are found in sandstone deposits, in the form of roll-front, peneconcordant and stacked types. Drilling on spacings of between 50 m and 5 m centres is the current method of attempting to delineate such ore bodies but because of the apparent random distribution of the mineralization there is a large degree of uncertainty in these predictions. Even on drilling grids of 3,5 m centres the uncertainty in predicting the distribution of stringer ore in roll front mineralization is still 100 per cent. (Sandefur & Grant 1980). Because of escalating costs it is becoming increasingly less economically feasible to delineate bodies of this nature in this manner and much more reliance will have to be placed on the geologist's interpretation of ore distribution when calculating ore reserves. The grade and tonnage of a sandstone uranium deposit can only be calculated with some degree of confidence if the processes forming the ore body are fully understood. The aim of this review is to examine the factors governing the formation and geometry of a sandstone body, the mobility and fixation of uranium and to establish criteria which will enable a more confident prediction to be made of the distribution of sand bodies and the distribution of the mineralization within them
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- Date Issued: 1981
Geological factors affecting tonnage-grade relationships in orebodies of the Zambian Copperbelt
- Authors: McCulloch, Alan B
- Date: 1981
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:21151 , http://hdl.handle.net/10962/6617
- Description: The occurrence of a major metalliferous province in Zambia and Zaire is a reflection of geological processes operating in a specific environment during a particular period. The size of orebodies, their grade, mineralogy, beneficiation characteristics and therefore the amount of metal produced are all ultimately functions of the geology of the ores. This study is primarily concerned with the effect geology has on tonnage-grade relationships of ore in situ on the Zambian Copperbelt. Five major topics related to ore tonnage and grade are reviewed here: -behaviour of copper and cobalt in surficial environments. -geological setting and gross lithostratigraphic relationships of mineralization. -characteristics of known orebodies. -geological factors affecting mining and beneficiation of ore. -orebody limits and estimation of tonnage and grade. In addition, the historical background to the problems discussed here is briefly described, and some general aspects of the evaluation, mining and beneficiation of Copperbelt ores are considered in relation to metal production.
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- Date Issued: 1981
Geological factors that influence the evaluation and exploitation of Canadian copper-zinc massive sulphide-, and Japanese polymetallic (kuroko) deposits
- Authors: Venter, D M
- Date: 1981
- Subjects: Sulfides -- Canada , Ore deposits -- Japan
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4918 , http://hdl.handle.net/10962/d1003812
- Description: Volcanogenic massive sulphide deposits are important sources of base metals throughout the world. The Canadian Cu-Zn-(Au, Ag) deposits of Archaean age occur in greenstone terrains within the Canadian Shield. These deposits are closely associated with volcanic vents developed along zones of rifting within mobile belts. The vents are manifested by coarse felsic pyroclastics and/or rhyolitic domes. The Japanese Pb-Zn-Cu-Ba(Ag) deposits, generally known as Kuroko deposits, are of Miocene age, and although also associated with volcanic vents, are developed above zones of subduction. Mineralization in volcanogenic deposits is a result of submarine exhalation of metalliferous hydrothermal solutions derived from fractionation of predominantly calc-alkaline magmas. The deposits are characterized by certain geological features that result from the interaction of specific physical and chemical conditions during deposition. Primary features include massive and stringer sulphide bodies, alteration zones, mineralogical and metal zoning, and certain depositional textures and structures. These features are commonly modified by subsequent metamorphism and deformation which impart secondary ore textures and affect metal distribution and shape. The disparity in age between Canadian and Japanese deposits allows the entire spectrum of geological features to be studied; from the completely unaltered to the high deformed and recrystallized. The characteristic geological features are the prime factors which control the metal distribution and concentration, and the size and shape of the deposits, thereby influencing the viability of the respective ore bodies. A knowledge of these factors and the physico-chemical parameters which control them are thus fundamental in the "understanding" of these deposits. They ultimately control the geological interpretations and predictions made during ore body delineation, ore reserve estimation, mining and ore beneficiation.
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- Date Issued: 1981
Geology and ore reserve estimation of the Witwatersrand-type gold deposits with specific reference to the Welkom Goldfield
- Authors: Ainslie, L C
- Date: 1981
- Subjects: Mines and mineral resources -- Statistical methods Mine valuation -- Statistical methods Gold ores -- Geology Witwatersrand Basin (South Africa) Ores -- Sampling and estimation -- Statistical methods
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4911 , http://hdl.handle.net/10962/d1001571
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- Date Issued: 1981
Hugo Raes : de roman als montage : een struktuuranalyse van De vadsige koningen, Een faun met kille horentjes en, Het smarán, het vikka, de ronko en al de andere kleuren van de geschiedenis
- Authors: Renders, L E M M E
- Date: 1981
- Subjects: Raes, Hugo -- Criticism and interpretation Raes, Hugo -- De vadsige koningen Raes, Hugo -- Een faun met kille horentjes Raes, Hugo -- Het smarán, het vikka, de ronko en al de andere kleuren van de geschiedenis Dutch fiction -- 20th century -- History and criticism
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:3623 , http://hdl.handle.net/10962/d1007493
- Description: De analyse van het individuele literaire werk zal steeds het begin- en eindpunt moeten zijn van de literatuurstudie in welke gedaante dan ook: "Dit neemt echter niet weg dat het begin en einde, het alfa en omega van de literaire bedrijvigheid, het literair kunstwerk als zodanig, de literaire intentie, functie en efficientie de literair, literairesthetisch, te actualiseren en te valoriseren tekst is ... " (Rutten, 1973, p.144). Juist deze vorm van onderzoek lijkt op het ogenblik soms weI eens verloren te raken tussen de veelheid van literaire theorieen die overal opgang maken. De beoefenaars van de literaire kritiek lijken dikwijls meer begaan met het opbouwen en afbreken van theorieen dan met het literaire werk zelf. Sinds W. Bloks studie Verhaal en lezer in 1960 voor het eerst het licht zag, mag er dan op het gebied van de literatuurwetenschap in de Nederlanden en daarbuiten heel wat veranderd zijn, maar zijn uitspraak: " ... dat de romantheorie op het ogenblik het meest gebaat is met analyses van afzonderlijke werken" (1969, p.9) heeft zeker nog niets aan geldigheid ingeboet.
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- Date Issued: 1981
In search of true humanity : a voice of protest
- Authors: Ntshebe, Ephraim Lulamile Cootler
- Date: 1981
- Subjects: Church and state -- South Africa Christianity and politics -- South Africa Apartheid -- Religious aspects Human rights -- South Africa Race relations -- South Africa
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:1221 , http://hdl.handle.net/10962/d1001551
- Description: My duty and aim in the writing of the thesis was neither based on scholarship nor on the fluttering of the dove coates of theological orthodoxy, but on the interpretation of the austere nature of the life of black people under the Nationalist Party rule of Apartheid. My duty, therefore, is that of an interpreter of the situation. There is nothing academic about apartheid. What is there is the monstrous evil perpetuated through the genius of the Afrikaner-Broederbond and the Afrikaans Churches and to a lesser extent by the liberal white community within the confines of South Africa (Introduction, p. vii)
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- Date Issued: 1981
Labour migration, marriage and family life in a Ciskei village
- Authors: Manona, Cecil Wele
- Date: 1981
- Subjects: Migrant labor -- Social aspects -- South Africa -- Ciskei
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2107 , http://hdl.handle.net/10962/d1006884
- Description: From introduction: The aim of this thesis is to describe and analyse the effects of labour migration on marriage and family life. The field material is from Burnshill, a village situated in the Keiskammahoek district in the Ciskei. Keiskammahoek is bounded on the East by the districts of King William's Town and Stutterheim, on the West and South by Middledrift and on the North by Cathcart. The inhabitants of Burnshill are overwhelmingly Xhosa and Mfengu (the main ethnic groups in the Ciskei) but also include a small proportion of people whose clans are of Mpondo and Thembu origin. This village has undergone extensive change. As we shall show later, it was settled de novo by the Mfengu and the Xhosa during the second half of the past century. This is one of the reasons why it lacks the homogeneity and continuity of cultural tradition which are predominant features of long-established communities.
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- Date Issued: 1981
Le test de McKenzie-Stoughton: méthode de mesure de l’effect réservoir
- Authors: Woodford, R , Haigh, John M , Barry, B W
- Date: 1981
- Language: French
- Type: Article
- Identifier: vital:6448 , http://hdl.handle.net/10962/d1006635
- Description: A la suite de I'observation que firent Mac Kenzie et Stoughton en 1962, montrant que I'application locale de cortico'ldes anti-inflammatoires peut produire un blanchiment de la peau, des tests ont ete mis au point pour apprecier la constitution d'une telle paleur chez des sujets volontaires. Les techniques qui ont ete publiees sont variables quant a la methode d'application (avec ou sans occlusion), la duree d'application du cortico'lde (.c'est-a-dire duree breve de 6 a 8 heures ou prolongee de 16 a 20 heures) et quant a la methode d'appreciation de la reponse, enregistree par exemple comme etant presente ou absente, ou bien cotee, soit avec une simple lecture,. soit avec des lectures repetees, pendant un certain temps. Les auteurs ont mis au point des essais standart de vasoconstriction avec et sans occlusion, pour apprecier les preparations quant a leur efficacite clinique pour determiner la biodisponibilite des cortico'ldes a partir des supports pour applications locales. A condition que I'investigateur et Ie volontaire se conforment strictement au protocole du test les methodes suivantes ont une precision surprenante d'appreciation (Barry et Woodford, 1978).
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- Date Issued: 1981
Message to be broadcast over the SABC by the Vice-Chancellor on plans and prospects for Rhodes University in 1981
- Authors: Henderson, Derek Scott
- Date: 1981
- Language: English
- Type: text
- Identifier: vital:7444 , http://hdl.handle.net/10962/d1018321
- Description: The year 1980 has been a good one for Rhodes University, both academically and financially. In the academic sphere, the University launched the M.Sc degree course in Limnology and there have been extensions to the courses offered in African History and in English in Africa. The major development, however, has been the establishment of two new chairs - one in Electronics and the other in English-Second- Language, endowed respectively by Federale Electronics and the Molteno Brothers' Trust.
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- Date Issued: 1981
Mineralogy and petrology of two kimberlites at Dutoitspan Mine, Kimberley
- Authors: Snowden, D V
- Date: 1981
- Subjects: Kimberlite -- South Africa -- Kimberley , Mineralogy -- South Africa -- Kimberley , Petrology -- South Africa -- Kimberley
- Language: English
- Type: Thesis , Masters , MSc
- Identifier: vital:4929 , http://hdl.handle.net/10962/d1004706
- Description: The mineralogy and petrology of two kimberlites, a peripheral monticellite kimberlite, and its core of phlogopite kimberlite, from the West Auxiliary Pipe at Dutoitspan Mine are described. The mineralogy of the two kimberlites differs mainly in the presence of phlogopite macrocrysts, greater abundance of angular crustal inclusions, more heavy minerals and higher diamond grade in the phlogopite type. Microprobe analyses of olivine, phlogopite, monticellite, oxide minerals and garnet are presented. Silicate compositions are comparable in both kimberlites and zoning of olivine grains is typically towards a rim of Fo₈₉₋₉₀ʻ irrespective of whether cores are more Fe-rich or more Mg-rich. This is caused by re-equilibration after fluidised emplacement in the earth's crust of macrocryst-bearing kimberlite magma. Olivine aggregates were derived from sheared mantle lherzolite and single-crystal macrocrysts were formed at higher mantle levels from a kimberlitic crystal-mush magma. This was emplaced in the crust by rapid gas streaming. The post-fluidisation phenocrysts of olivine and phlogopite which formed then are in general more Fe-rich than macrocrysts. Re-equilibration of ilmenite results in the formation of complex perovskite and titanomagnetite mantles. Phlogopite macrocrysts are preserved in the monticellite contact rock where rapid quenching prevented their resorption and allowed separation of an immiscible carbonate melt, giving the abundant groundmass calcite. Atoll-textured spinels are found in the contact rock. Major and minor trace-element analyses of whole rock samples are presented and discussed, bringing into account the problem of contamination by crustal inclusions. Whole rock chemistry supports derivation of the kimberlites as partial melts of mantle material in the presence of a lithophile-element-enriched fluid. The monticellite contact rock is highly enriched in REE, Nb, and Sr due to rapid freezing of this perovskite-enriched phase. The monticellite type is more enriched in lithophile elements than the phlogopite type, which supports derivation of the monticellite type by a small degree of partial melting, further melting reducing the relative concentrations of lithophile elements to give the phlogopite kimberlite chemistry.
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- Date Issued: 1981
Phambili basebenzi - Abasebenzi bemizi yeentsimbi babadudulele emva abaqashi
- Authors: General Workers Union (GWU)
- Date: 1981
- Subjects: GWU
- Language: Xhosa
- Type: text
- Identifier: http://hdl.handle.net/10962/161074 , vital:40587
- Description: Abasebenzi kwinkampani ezintathu zeentsimbi kweli lase Kapa - Trident Marine, Consani Engineering no Dorman Long bathathe inyathelo elibanzi ekukhabeni inkqubo yom- butho wabarwebi ebizwa ngokuba yi Industrial Council. Lo mbutho kwimizi yeentsimbi ngowona mkhulu apha kweli lo mzantsi Afrika. Aba baqashi bamelwe ngumbutho wabo oyi SEIFSA, ngumbutho onamandla kakhulu lo woongxowa-nkulu apha kweli lethu.
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- Date Issued: 1981