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Beasts to beer pots - migrant labour and ritual change in Willowvale district, Transkei

  • Authors: McAllister, Patrick A
  • Date: 1985
  • Language: English
  • Type: Article
  • Identifier: vital:6112 , http://hdl.handle.net/10962/d1003832
  • Description: [From the introduction]: Why do some rituals disappear while others continue to be performed? Why do some persist in a relatively unaltered state while others are radically modified? In an article published in 1978 Monica Wilson drew attention to the scarcity of information on this subject, and proceeded to consider possible reasons for the 'resilience' of certain rituals, such as those accompanying initiation and death, and the 'obliteration' of others, such as those concerning the birth of twins. My concern in this paper is with the persistence and radical modification of a Gcaleka ritual called umhlinzeko or umsindleko, performed in celebration of the return of a migrant worker to his rural home. The earlier form of the ritual (umhlinzeko) is described and this is followed by an outline of the present-day form (umsindleko). The bulk of the paper is taken up with an attempt to explain why the one form gave way to another. In this respect the analysis concentrates on the relationship between the two forms and their socio-economic contexts, and tries to relate the changes in the form and meaning of the ritual to the changing economic and political circumstances affecting the Gcaleka and other Xhosa-speakers.
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  • Date Issued: 1985

Changes in the image of the feminine from Giotto to Raphael

  • Authors: Crossley, Elizabeth Ellen
  • Date: 1985
  • Subjects: Giotto, 1266?-1337 Feminine beauty (Aesthetics) Women in art
  • Language: English
  • Type: Thesis , Masters , MFA
  • Identifier: vital:2471 , http://hdl.handle.net/10962/d1009448
  • Description: From Introduction: The ideal of femininity which developed in Renaissance painting, was a visual and psychological type which was to become the Western European Christian formula of the feminine. This type has survived until the present day, so a discussion of its origins can be revealing for us in the twentieth century, especially as it has been neglected in traditional art historical works. In this essay, the changes in the image of the feminine, in just under three hundred years of Florentine painting, starting with Giotto1. and ending with Raphael~· will be covered. The images will be taken from the wo rk of artists who were Florentine in training, who worked in the city or who were strongly influenced by the Florentine style of painting. I have divided the paintings I have studied into three sections. In the Religious section the paintings are mainly of Mary. The Mythological images refer to Greek and Roman myths and the humanistic interpretations of them. Finally, the Portrait and Genre images are selected on the following basis: In the genre paintings they are sometimes part of works related to religion or mythology, but, in their handling, the painters treat the figures as real human beings rather than holy or mythological figures. In others they are bona fide portrait representations. 3. I have made the above distinction because I expect that the gap between religio-mythological images and portraits will give some indication of the difference between the ideal and the reality for women of that time. The images will be analysed and changes noted in favoured types, gestures, expressions, movements, placing in the composition, relationships to others, favoured themes, costume, colour and symbols. I will point out as I proceed the effects that these elements had on the mood and tone of each image.
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  • Date Issued: 1985

Commission of inquiry to investigate the development of a comprehensive labour market policy

  • Authors: NUM
  • Date: 1985
  • Subjects: NUM
  • Language: English
  • Type: text
  • Identifier: http://hdl.handle.net/10962/250662 , vital:52036
  • Description: In 1985, the Central Statistical Services and the Chamber of Mines ceased publishing a racial breakdown of mining industry employment. This marked the end of a statistical series that dated back for almost 100 years. Since 1985, there is no official series of racially segmented data for the mining industry, while the racial breakdown of employment in all other sectors of the economy was published up until 1992. From 1993, the Central Statistical Services introduced a new “Unspecified Race” category into its published employment data, making the identification of trends in employment and income by race less certain. The statistical information on racial issues in this submission must reflect these difficulties with the data. In respect of gold and coal mines that are members of the Chamber of Mines, the Chamber periodically has made available unpublished information on employment and total wages after 1985, grouped into “skilled employees” and “unskilled / semi-skilled employees.” Until about 1989, when legal barriers to the employment of blacks in skilled jobs were removed, the two Chamber categories reflect the old “White” and “Non-White” categories used by the Chamber before 1986. Since 1989, a small, but slowly increasing number, of skilled workers have been black, but this has not been taken into account in any of the statistics presented for the gold and the coal sectors. “Black” employment in the gold and coal mining industry thus refers to employees in Categories 1 to 8, the only groups for which the NUM currently bargains with Chamber member mines.
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  • Date Issued: 1985

Comparative bioavailability and ranking of topical corticosteroid formulations

  • Authors: Meyer, Eric
  • Date: 1985
  • Subjects: Adrenocortical hormones -- Therapeutic use Drugs -- Bioavailability Drugs -- Dosage forms
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3732 , http://hdl.handle.net/10962/d1001471
  • Description: Numerous experiments in recent years have indicated differences in the bioavailability of corticosteroids from seemingly identical topical dosage forms. The human blanching assay was utilized in this study to assess the comparative blanching activities of various locally manufactured proprietary corticosteroid preparations. The first experiment was performed to assess the relative blanching activities of six semi - solid preparations containing the same concentration of betamethasone 17-valerate. The preparations used were Betnovate cream and ointment, Persivate cream and ointment and Celestoderm-V cream and ointment. This was followed, in the second experiment, by the investigation of the blanching activities of two lotions containing betamethasone 17-valerate (Betnovate and Celestoderm-V) and a lotion containing betamethasone 17,21- dipropionate (Diprosone). The third experiment involved a study of six semi-solid proprietary corticosteroid-containing formulations, viz. Dermovate (clobetasol propionate) cream and ointment, Betnovate (betamethasone 17-valerate) cream and ointment and Eumovate (clobetasone butyrate) cream and ointment. This investigation was prompted by claims in advertisements in the medical media that Dermovate is therapeutically more efficacious than Betnovate which is more efficacious than Eumovate. The penultimate experiment in this study served the purpose of finding a corticosteroid-containing preparation that falls into the moderately potent group of corticosteroid formulations, as described in the United Kingdom MIMS. This preparation was used in the final experiment which was undertaken to ascertain the potency category of Florone (diflorasone diacetate) cream and ointment.
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  • Date Issued: 1985

Computer control of a barry research chirpsounder

  • Authors: Evans, Geoffrey Philip
  • Date: 1985
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5507 , http://hdl.handle.net/10962/d1007495
  • Description: This thesis describes the design and development of a computer-based controller together with additional hardware that greatly extends the capabilities of a Barry Research VOS-1 Chirpsounder. The measurement of the virtual height of the ionosphere as a function of frequency using pulse- and frequency-modulated carrier wave (FMCW techniques is described and the concept of the so called "digital" ionosonde is introduced. The modifications required for the standard Chirpsounder to perform as a versatile digital chirp ionosonde are discussed. Simplified block diagrams are used to describe the Controller hardware which is fully described in two comprehensive service manuals which have been included as appendices. Important aspects of the Controller software and data storage formats are described in detail. The emphasis is then placed on system capabilities. An operators' software manual which describes system initialization and operation in terms of system commands is included as an appendix. Results of tests at both Grahamstown, South Africa , and at the SANAE base in the Antarctic are presented.
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  • Date Issued: 1985

Concurrency in modula-2

  • Authors: Sewry, David Andrew
  • Date: 1985 , 2013-03-13
  • Subjects: Modula-2 (Computer program language) , Programming languages (Electronic computers) , Computer multitasking
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4582 , http://hdl.handle.net/10962/d1004369 , Modula-2 (Computer program language) , Programming languages (Electronic computers) , Computer multitasking
  • Description: A concurrent program is one in which a number of processes are considered to be active simultaneously . It is possib l e to t hink of a process as being a separate sequential program executing independently of other processes, although perhaps communicating with them at desired pOints . The concurrent program, as a whole, can be executed in one of two ways: il ii) in true concurrent manner, wi th each process executing on a dedicated processor in a quasi - concurrent manner, where a processor's processes . time is multiplexed between single the There are two motivations for the study of concurrency in programming languages : i) concurrent programming facilities can be exploited in systems where one has more t han one processor . As technology i mproves, machines having multiple processors will proliferate ii) concurrent p r ogramming facilities may allow programs to be structured as independent , bu t co - operating, processes which can then be implemented on a single processor system . This structure may be more natural to the programmer then the traditional sequential structures. An example is provided by Conway's - 1- Clearly, languages Pascal) problem [Ben82] . by their very nature, traditional sequential- type (Fortran, Basic, Cobol and earlier versions of prove inadequate for the purposes of concurrent programming without considerable extension (which some manufacturers have provided, rendering their compilers non standard-conforming). The general convenience of high level languages provides strong motivation for their development for rea l time programming. Modula - 2 [Wir83] is but one of a number of such r ecently developed languages, designed not only to fulfil a "sequential" role but also to offer facilities for concurrent programming. Developed by Niklaus Wirth in 1979 as a successor to Pascal and Modula, it is intended to serve under the banner of a generalpurpose systems - implementation language. This thesis investigates concurrency i n Modula - 2 and takes the following form: i ) an analYSis of the concurrent facilities offered ii) problems and difficulties associated with these facilities iii) improveme nts and enhancements, including the feasibility of using Modula - 2 to simulate constructs found in other languages, such as the Hoare monitor [Hoa74] and the Ada rendezvous [Uni81]. - 2- Each section concludes with an appraisal of the work conducted in that section . The final section consists of a critical assessment of those Modula - 2 language constructs and facilities provided for the implementation of concurrency and a brief look at concurrency in Modula, Modula-2's predecessor. - Introduction. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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  • Date Issued: 1985

COSATU Hymns - Translation Zulu to English

  • Authors: COSATU
  • Date: 1985
  • Subjects: COSATU
  • Language: English, Zulu
  • Type: text
  • Identifier: http://hdl.handle.net/10962/153842 , vital:39527
  • Description: SANIBONANI NONKE FOSATU (X2) SIYANIBINGELELA NONKE NGO 1985 (X2) We greet you all FOSATU we greet you all in 1985 SIYANIBINGELELA NONKE NGO 1985 (X4) We greet you all in 1985.
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  • Date Issued: 1985

Determination of erythromycin in serum and urine by high performance liquid chromatography with ultraviolet detection

  • Authors: Stubbs, Christopher , Haigh, John M , Kanfer, Isadore
  • Date: 1985
  • Language: English
  • Type: text , Article
  • Identifier: vital:6428 , http://hdl.handle.net/10962/d1006576
  • Description: A high-performance liquid chromatographic analysis of erythromycin in human serum and urine with UV detection at 200 nm is presented. The method involves a solid-phase extraction procedure followed by a simple phase separation step and chromatography on a reversed-phase column. The method has sensitivity limits of 0.25 and 1.0 g/mL in serum and urine, respectively, and is sufficiently sensitive to monitor concentrations of erythromycin in human serum and urine after the administration of a single 500-mg erythromycin stearate tablet.
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  • Date Issued: 1985

East London: the creation and development of a frontier community, 1835-1873

  • Authors: Tankard, Keith Peter Tempest
  • Date: 1985
  • Subjects: East London (South Africa) -- History
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2580 , http://hdl.handle.net/10962/d1004550 , East London (South Africa) -- History
  • Description: From Preface: Although East London exists today as one of the major ports of South Africa, the city appears to have been forgotten by historians. Little has been done to chronicle its history. In 1932, Bruce Gordon set out to initiate this research and he investigated East London's history to the end of 1865. However, Gordon's thesis, though accurate, is short and inadequate by today's standards. Furthermore, no-one continued from where Gordon left off. Several articles have been written over the previous six decades, each dealing with aspects of East London's past but these, on the whole, are inaccurate and misleading. The time is ripe, therefore, to begin again the research into the history of East London. East London owed its foundation to the state of unrest which existed on the eastern frontier of the Cape of Good Hope between 1834 and 1847. Although the geographic and climatic conditions were in the port's favour, East London remained in a suppressed condition until about 1870. It is the purpose of this thesis to examine the factors which gave rise to this truncated growth. The thesis will examine first the wider perspective of imperial and colonial policy in which East London was conceived and in which it had its early existence. The implications of this policy for East London at the various levels of the port's development will be explored in subsequent chapters. British and Cape colonial policy, however, evolved in a chronological sequence and so the examination of this policy likewise will tend to follow a chronological pattern within each chapter. The establishment of Port Rex in November/December 1836 enters into East London's story in several ways: its political development, the creation and development of the harbour on the Buffalo River, the evolution of trade, the growth of the community and the status of the black population at the mouth of the Buffalo River. It has been found necessary, therefore, to refer often to this beginning of East London's history. Although several theses have already been written which deal with topics related to British Kaffraria, none of these do more than allude to the creation and development of East London. Although, for example, the German Settlers played an important role in the growth of the port, Schnell's thesis hardly mentions the two communities at Panmure and Cambridge. The research for this thesis led me to two important and little known sources of early information, both in Cape Town. The first was the multiple volumed "Unsorted Archives" on East London which consists of reports and letters to the Resident Magistrate. It is a treasure chest of information on East London's early years. The second source was G.M. Theal's newspapers, The Kaffrarian Recorder and East London Shipping Gazette and, later, The Kaffrarian, East London's second newspaper which was believed to have been lost until copies were discovered recently in the South African Library in Cape Town. Theal, later prominent as a historian, had a clear insight into the problems which confronted the community at East London and the editorials of his newspaper make interesting reading. East London's first newspaper is, unfortunately, still lost. It was the East London Times which had its first issue in January 1863, and lasted a mere two months. It consisted of half a sheet of foolscap printed on one side, the other side being left blank, the editor of the King William's Town Gazette wrote, "'for want of room' or from lack of matter."
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  • Date Issued: 1985

Economy and efficiency of human locomotion

  • Authors: Goslin, Brian Richard
  • Date: 1985
  • Subjects: Walking -- Physiological aspects , Running -- Physiological aspects , Human locomotion
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:5142 , http://hdl.handle.net/10962/d1007177 , Walking -- Physiological aspects , Running -- Physiological aspects , Human locomotion
  • Description: Human locomotor economy and efficiency are highly variable. This study investigated the role that stature plays in this variation, by evaluating metabolic and respiratory responses to walking and running at speeds set relative to one's stature. Four groups of subjects: male, high V0₂ max (n = 11); male, average V0₂ max (n = 10); female, high V0₂ max (n = 10); and female, average V0₂ max (n = 11) were habituated to treadmill locomotion prior to the measurement of maximal oxygen consumption (V0₂ max). The V0₂ max test entailed 1 km.h⁻¹ increases per min from 3 to 6 km.h⁻¹ walking, and 7 - 17 km.h⁻¹ running then 1% grade increments per min until exhaustion. On each of four other occasions, the subject walked or ran at 6 of a variety of relative speeds - walking at 0.5, 0.7, 0.9, 1.1, 1.3; running at 1.5, 1.7, 1.9 and for selected subjects 2.1, 2.3 and 2.5 statures.s⁻¹ ,and grades - 0%, +3%, -3%. Steady-state respiratory and metabolic responses, and treadmill speed were monitored by an on-line computer system developed for this study. Cadence and RPE were also monitored. All subjects demonstrated an exponential relationship between V0₂ and walking relative speed (st.s⁻¹) (RS) . V0₂ (ml.kg⁻¹.min⁻¹ ) = 4.747 * e(1.371*RS) During running this relationship was essentially linear . The variability of economy at relative speed (9.08%) and absolute speed (9. 01%) did not differ. Male and female subjects did not differ in response to absolute speed but females were more economical at relative speeds (p<0.05). Those with high and average aerobic capacity did not differ in locomotor economy at relative speed. Higher freely-chosen stride length was associated with a higher V0₂ response as velocity increased. The V0₂ of uphill walking was 1.4 times greater than that for downhill walking (running: 1.28 times) . Stride length decreased with increasing speed in uphill locomotion but the reverse was the case for downhill. The economy and efficiency of walking was greater than that of running. Walking economy was maximal between 0.7 and 0.9 st. s⁻¹. Running economy remained essentially unaffected by increased velocity. The setting of locomotor velocity relative to stature does not minimize inter-subject variability in metabolic and respiratory response .
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  • Date Issued: 1985

Engel en aarde : gedagtes oor "natuur en bo-natuur" by die lees van Sheila Cussons

  • Authors: De Villiers, Johanna Helena
  • Date: 1985
  • Subjects: Cussons, Sheila -- Criticism and interpretation
  • Language: Afrikaans
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:3619 , http://hdl.handle.net/10962/d1006960
  • Description: Hierdie studie is In poging om uit die veelgeskakeerde digwerk van Sheila Cussons een draad te neem en dit deur te volg; in die hoop dat dit 'n Ariadne-draad mag word tot beter besef van die ryk gestruktureerdheid en diepte van haar verwysingsveld, en die betekenis daarvan vir ons tyd. Dis dan primer die beeld van die engel wat nagespeur word, as bonatuurlike wese wat nie tot die vlak van die fisiese inkorporeer nie. (From Ch. 1)
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  • Date Issued: 1985

Gerard Manley Hopkins's poetic art as "current language heightened" : (with reference to selected sonnets and in the light of contemporary stylistic theory)

  • Authors: McDermott, Lydia Eva
  • Date: 1985
  • Subjects: Hopkins, Gerard Manley, 1844-1889 , English poetry -- 19th century -- History and criticism
  • Language: English
  • Type: text , Thesis , Masters , MA
  • Identifier: vital:2337 , http://hdl.handle.net/10962/d1002019
  • Description: The aim of this thesis is twofold: To examine Hopkins's writings on poetics and to relate these to modern theories of poetic stylistics; and to show, through an examination of two sets of Hopkins sonnets, the ways in which Hopkins's writings on language and poetics are reflected in his verse (Introductory outline, p. 5)
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  • Date Issued: 1985

Granitoid related Sn-W mineralisation with special reference to southern Africa, the Variscan Belt in Europe, and the Malay Peninsula

  • Authors: Bentley, Philip Nelson
  • Date: 1985
  • Subjects: Geotectonic settings , Granitoids , Granites , Tin-tungsten , Mineralisation , Greisen environment , Minerals , Exploration
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4908 , http://hdl.handle.net/10962/d1001568
  • Description: A review of the geotectonic settings of granitoids and various tin-tungsten provinces in Europe, Malaysia and southern Africa shows a close spatial and temporal association of mineralisation to S-type ilmenite series granitoids. Granitoids with these affinities are derived from crustal anatexis and are most commonly found in continental collision and different ensialic, intraplate orogenic settings, (e.g. SW England, Malaysia, Namibia) as well as in association with anorogenic magmatism (Nigeria, Brazil, South Africa). Tin-tungsten mineralisation is related to late- to post-tectonic granites, emplaced into areas of substantial tectonic thickening. Crustal anatexis leads to an observable calcalkaline chemical trend, with a source of gabbroic or amphibolite composition through anatexis to; mafic-intermediate enclaves, para-autochthonous anatectic granitoids (tonalite, granodiorite), to intermediate level quartz monzonite, granodiorite, biotite-granite, to late-tectonic highly fractionated muscovite-bearing granites, and high level porphyry intrusions. Mineralisation is spatially related to apical protrusions of the youngest most differentiated granite. Various mineralised environments are recognised, including endogranitic veins, primary disseminations, pegmatites and pipes, and exogranitic stockwork and fissure veins, and replacement bodies. A common factor to all these deposits is the inherent greisen environment, characterised by postmagmatic metasomatic alteration and mineral deposition. Common alteration mineral assemblages include albite, quartz, muscovite, tourmaline, and fluorite ∓ topaz. Ore mineral assemblages commonly display a paragenetic sequence of oxides (cassiterite, wolframite, scheelite), followed by sulphides (molybdenite, pyrite, pyrrhotite, chalcopyrite sphalerite, arsenopyrite/loëllingite, Pb-Bi(Ag) sulphosalts) and then lower temperature carbonates (calcite, siderite, ankerite). Analysis of Pan African orogenic provinces in southern Africa (Damara and Saldanian Provinces) shows there is good potential for applying integrated exploration techniques in search of endo-exogreisen Sn-W systems. Careful analysis and interpretation of granitoid geochemistry (K₂0, Na₂0, FeO/Fe₂0₃, F, B, Sn, W, Mo, Cu, Rb, Sr, Ti, Zr) should aid delineation of Sn-W and Mo-Cu metallogenic provinces in these regions. Magnetic susceptibility determinations should also aid distinction of S-type ilmenite series (less than 1 x lO⁻⁴emu/g ) from I-type magnetite series (more than 1 x lO⁻⁴emu/g ) granitoids
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  • Date Issued: 1985

High performance liquid chromatographic analysis of erythromycin in serum and urine

  • Authors: Stubbs, Christopher
  • Date: 1985 , 2013-03-13
  • Subjects: High performance liquid chromatography , Erythromycin , Erythromycin -- Pharmacokinetics , Chromatographic analysis
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3813 , http://hdl.handle.net/10962/d1004581 , High performance liquid chromatography , Erythromycin , Erythromycin -- Pharmacokinetics , Chromatographic analysis
  • Description: Erythromycin, a macrolide antibiotic used mainly against gram-positive bacteria has been in clinical use since 1952 (1). Previous pharmacokinetic data published on this antibiotic have been derived predominantly from microbiological assay techniques. However, these techniques are relatively imprecise as well as being non-specific and extremely tedious to perform. A novel high performance liquid chromatographic analysis of erythromycin in human serum and urine using U.V. detection at 200 nm and/or electrochemical detection using both an amperometric and a coulometric electrochemical detector is presented. The method involves a solid phase extraction procedure followed by a simple phase separation step and chromatography on a reverse phase column. In order to select the optimum U.V. detector for this analysis, five "state of the art" detectors were compared in terms of their signal-to-noise ratios at U.V. wavelengths between 200 and 210 nm. A known metabolite des-N-methylerythromycin is readily detectable using U.V. detection, whilst another metabolite/degradation product anhydroerythromycin is not seen using U.V. detection but is readily observable using an electrochemical detector. The method has a limit of sensitivity of 0.25 μg/mL and 1.00 μg/mL in serum and urine respectively (U.V. detection) and is sufficiently sensitive to monitor serum and urine concentrations of erythromycin in man after administration of a single 500 mg erythromycin stearate tablet. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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  • Date Issued: 1985

Influence of endogenous female sex-steroids on mutagen metabolism

  • Authors: Goold, Richard David
  • Date: 1985 , 2013-03-15
  • Subjects: Mutagenesis , Drugs -- Metabolism , Steroid hormones -- Receptors , Cytochrome P-450
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:3819 , http://hdl.handle.net/10962/d1004919 , Mutagenesis , Drugs -- Metabolism , Steroid hormones -- Receptors , Cytochrome P-450
  • Description: Cytochrome P-450, the terminal oxidase of the metabolic mono-oxygenase system, is thought to exist in multiple forms, which have differing substrate specificities, and are variably inducible by different enzyme inducers. Many mutagens, themselves unreactive, require metabolic activation by one or more of these cytochrome P-450-dependent microsomal enzymes for mutagenic activity. Such mutagens may be detected in the Salmonella mutagenicity test only by the incorporation of an hepatic microsomal (59) fraction into the assay (as a first approximation to in vivo metabolism). Induction of the microsomal enzymes by different agents enhances the metabolic activation of mutagens; in fact, many mutagens are only detected when the 59 fraction has been induced by appropriate agents. Inducers of the phenobarbital-type are known to enhance microsomal steroid hydroxylation when administered at supraphysiological levels, inducers of several mono-oxygenase activities. In turn, the steroids, have been reported to be The inductive effects of the female sex-steroids and the combined effects of steroid and phenobarbital (PB) pretreatment on the metabolic activation of four mutagens have been investigated using the Salmonella assay. Female Sprague-Dawley rats were pret reated with 17a-oestradiol (E2) or progesterone (PRG) , at a level of either 1 mg/kg or 20 mg / kg daily for 14 days. A duplicate set of similarly pretreated groups were also induced with PB. Hepatic microsomal fractions were prepared from each group and incubated with each of the te st mutagens in the presence of a tester strain known to detect each particular type of mutagen. Induction of the hepatic metabolizing system by PB increased the activation of the mutagens significantly (as reflected by an increased number of revertant prototrophic S .typhimurium colonies). The administration of PRG also caused significant, and dose-dependent, induction of the activation of af l atoxin B1, benzo(a)pyrene, and dimethylnitrosamine. In general, E2 exhibited no inductive effect, but it did produce an increase in the activation of aflatoxin B1 (a reaction which is known to be catalysed by a mono-oxygenase prefe rentially inducible by PB). When use was made of a microsomal fraction that was prepared from animals which were both steroidpretreated and induced by PB, mutagenic activation was of the same order of magnitude as that observed when induction was brought about by PB alone. The absence of additive effect, taken together with the observations already mentioned, indicate that steroids induce the same cytochrome isozymes that are induced by PB. The implications of sex-hormonal regulation of the metabolic activation of mutagens are briefly discussed. , KMBT_363 , Adobe Acrobat 9.53 Paper Capture Plug-in
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  • Date Issued: 1985

Intervarsity message 1985

  • Authors: Henderson, Derek Scott
  • Date: 1985
  • Language: English
  • Type: Text
  • Identifier: vital:7481 , http://hdl.handle.net/10962/d1018358
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  • Date Issued: 1985

Mineralogy and petrology of the Townlands iron-rich ultramafic pegmatite

  • Authors: Phillips, David
  • Date: 1985 , 2013-09-09
  • Subjects: Ultrabasic rocks -- South African -- Rustenburg , Platinum ores -- South Africa -- Rustenburg , Pegmatites -- South Africa -- Rustenburg , Mines and mineral resources -- South Africa -- Rustenburg
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:5040 , http://hdl.handle.net/10962/d1007617 , Ultrabasic rocks -- South African -- Rustenburg , Platinum ores -- South Africa -- Rustenburg , Pegmatites -- South Africa -- Rustenburg , Mines and mineral resources -- South Africa -- Rustenburg
  • Description: The Townlands iron-rich ultramafic pegmatite is a relatively large pipelike body situated in the western corner of Rustenburg Section, Rustenburg Platinum Mines. It is characterised by a strong negative magnetic signature and transgresses the noritic layered sequence of the upper critical zone of the Bushveld Complex. The layered rocks are downwarped in the vicinity of the pipe and are in sharp contact with the pegmatitic material. The pegmatite varies in composition between dunite and wehrlite, with the marginal zones being more wehrlitic in composition. Olivine (Fo₃₀ - Fo₅₂) and clinopyroxene (Wo₄₅En₃₀Fs₂₅ - Wo₄₅En₃₇Fs₁₈) are the dominant constituents and accessory phases include ilmenite, Ti -magnetite, apatite, amphiboles, chlorite-group minerals, biotite, ilvaite and a host of unusual ore minerals. The Fe-Ti oxides exhibit exsolution textures typically found in slowly cooled igneous rocks and temperatures of formati on are consi dered to be in excess of 800°C. The UG2 chromitite leader layers intersected by borehole TLP.l are enriched in Fe and Ti and exhibit compositions intermediate between chromite and Ti-magnetite. The ore mineral assemblage includes a primary sulphide assemblage consisting of troilite, chalcopyrite, cubanite and pentlandite, and an array of unusual phases formed by late-stage secondary processes. The unusual sulphides mooihoekite and haycockite, that occur in certain parts of the pegmatite, are considered to have formed by partial replacement of the primary assemblage and a possible paragenetic sequence is discussed. Mineral compositions and whole rock geochemical data are consistent with an origin for the pegmatite by crystallization from a fractionated melt. It is suggested that intercumulus fluids, trapped during the crystallization of the noritic layered sequence, accumulated in an area of structural weakness, in response to an increasing overburden pressure and/or tectonic activity. Evidence is also presented that indicates that the Townlands pegmatite may consist of at least two separate, but adjoining pegmatite bodies. , KMBT_363 , Adobe Acrobat 9.54 Paper Capture Plug-in
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  • Date Issued: 1985

Montagu middagskof

  • Authors: University of Cape Town, Centre for Extra-Mural Studies
  • Date: 1985
  • Subjects: Readers for new literates , Afrikaans language -- Readers
  • Language: Afrikaans
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/74888 , vital:30351
  • Description: Op Saterdag 5 Oktober 1985 het 50 mense indie saal van die Montagu/Ashton-Gemeenskaosdiens bymekaargekom. Almal het te doen met die Lees- en-Skryfprojek : daar was 21 leerders en 15 groepleiers uit die dorp en wyk; La-La, Dawie en ander personeel en vriende van die MAG; en 5 mense van die Kaap wat die afge- lope maande gehelp het met die projek. Die leerders en groepleiers het die stories geskryf wat in hierdie boek verskyn.
  • Full Text:
  • Date Issued: 1985

Philip Gibbs: war correspondent of a new dispensation

  • Authors: Woodward, Christina Anna
  • Date: 1985
  • Subjects: Gibbs, Philip, 1877-1962 , War correspondents , War -- Press coverage , Mass media and war , Journalists
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2577 , http://hdl.handle.net/10962/d1003126 , Gibbs, Philip, 1877-1962 , War correspondents , War -- Press coverage , Mass media and war , Journalists
  • Description: The process of democratization which appeared in the nineteenth century was partly responsible for the emergence of a mass readership. It consisted of the new urban population which had its own tastes and interests, intellectual capacity and purchasing power. The popular press was firmly established by 1900 and it radically altered the scope and style of daily journalism in its attempt to speak in the language of the majority. Philip Gibbs was one of the prominent journalists between 1900 and 1914. His aspiration to become a war correspondent stemmed from the image of the war correspondent as a figure of romance and adventure, the consequence of the militarist spirit of the age and the licence which granted him freedom of movement. Inevitably, the war correspondent carne in conflict with the military which had not kept pace with democratization and sensed a challenge to itself and to national security. Censorship and restrictions on the war correspondent tightened, until major army reforms between 1901 and 1912 brought more cordial relations between the press and the military. When the Great War broke out in 1914 the co-operative atmosphere broke down as censorship was reinstated, more severely than before. It challenged the freedom of the press and the right of the people to know. Gibbs was determined that the people should have access to news from the front. He fought hard for that objective and was instrumental in the compromise reached between the military and the press when an officially recognized system was devised for press representation on the Western Front. The wisdom of such a move was shown by the success of Philip Gibbs' war correspondence, which had appeal to a mass readership in its own language and with subjects of interest to it.
  • Full Text:
  • Date Issued: 1985

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