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The war of Ngcayecibi, 1877-8

  • Authors: Spicer, Michael Wolseley
  • Date: 1978
  • Subjects: Sarhili -- Xhosa paramount chief -- ca.1814-1892 , Frontier War, 1877-1879
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2559 , http://hdl.handle.net/10962/d1002412 , Sarhili -- Xhosa paramount chief -- ca.1814-1892 , Frontier War, 1877-1879
  • Description: This work makes no pretence at being a comprehensive account of the War of Ngcayecibi and its context in Cape and Imperial History. It omits all but passing reference to Imperial Policy, Frere's Federation plans, the Constitutional Crisis and the dismissal of the Molteno Ministry, all of which have been more than adequately covered elsewhere. Rather it concentrates on a study of the war in terms of black/white relations. The responses of the blacks to white pressures on their land and traditional society are examined, particularly those of Sarhili and the Gcaleka, for Sarhili, the gentlemanly but tragic Paramount Chief of the Xhosa, is the central figure in the canvas of black Ciskeian and Transkeian leaders of the time, and the War of Ngcayecibi is very much a Xhosa war. I have tried to avoid a conventional account of the military operations of the war, sketching only the broad outlines of military operations and concentrating on the strategies adopted by black and white forces, and the reasons for which various black chiefdoms or segments thereof participated in the war. Orthography. The matter of orthography is a tricky one, for Xhosa orthography has been recently overhauled and is not yet finalised. I have attempted with the aid of Mr Sidney Zotwana of the Institute of Social and Economic Research at Rhodes University to adopt the most acceptable forms of Xhosa names. I have dropped the use of all prefixes since I felt their use would have been pedantic in what, after a11, is an English language thesis and since there is no chance of confusion between historical figures like Gcaleka and the amaGcaleka people. Sources. The documents printed in Cape an~ Imperial Blue-Books, especially the Cape Blue-Books, on Native Affairs for the years 1874-1884, and the correspondence in the Native Affairs Archive in the Government Archives in Cape Town, proved to be the most valuable official and semi-official sources. The Merriman and Molteno Papers in the South African Library in Cape Town were the most useful private papers consulted, though odd items in the Cory Library, Rhodes University, Grahamstown, proved of use. The rash of memoirs published after the war were, with exceptions, singularly unilluminating. Most prominent amongst the exceptions was West W. Fynn: The'77 War ••• (East London, 1911), an account of the war written by the Clerk of the Resident to Sarhili. Although Fynn has a grudge against treatment he received from the Colonial Government at the time, and is not above dramatising his role, he was in an unparalle11ed position to observe the events leading up to the war and records much valuable information. The voluminous notebooks in Cory Library of the late Dr A.W. Burton, an amateur Border historian who had researched the war, were interesting but difficult to use because of an almost total lack of footnoting or reference to sources. J.R. Soga's two works, The South Eastern Bantu (Johannesburg, 1930) and The Ama-Xosa: Life and Customs (Lovedale, 1931) are well known and proved useful but, as will be seen, have to be treated with care. Of more modern works, J. Peires: "A History of the Xhosa c.1700-1835" if (unp. M.A. thesis, Rhodes University, 1976) proved invaluable as a background to Xhosa society and earlier Xhosa history. The works of Christopher Saunders, who has written much on topics related to the war, were indispensable. C.J. Schoeman: "Die Negende Grensbotsing" (unp. M.A. thesis, University of Port Elizabeth, 1976), the one general study of the war thus far written, covers military operations at great length and is a work very much in the mould of traditional Afrikaner Frontier Historiography.
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  • Date Issued: 1978

Synthesis and characterization of Na(Y,Gd)F4 upconversion nanoparticles and an investigation of their effects on the photophysical properties of an unsubstituted tetrathiophenoxy phthalocyanine

  • Authors: Taylor, Jessica M , Litwinski, Christian , Nyokong, Tebello , Antunes, Edith M
  • Language: English
  • Type: Article
  • Identifier: vital:7253 , http://hdl.handle.net/10962/d1020261
  • Description: Sphere- and star-shaped Na(Y,Gd)F4:Yb/Er(Tm)upconversion nanoparticles (UCNP) were successfully synthesized utilizing a methanol-assisted thermal decomposition approach and their spectroscopic (absorption, emission and luminescence lifetime) properties fully characterized. The factors affecting the size and shape of the UCNPs were studied and discussed in detail. The size of the nanoparticles was determined using TEM primarily and found to be approximately 19 and 30 nm for the Er and Tm spheres, respectively, while the Er and Tm “stars” were found to be much larger with sizes ranging from 110 to 240 nm, respectively (as determined along the width of the nanoparticle). In addition, their influence on the spectroscopic properties of an unsubstituted tetrathiophenoxy phthalocyanine (H2Pc) was investigated. The UCNP were found to produce characteristic upconversion luminescence emissions in the blue, green, red and NIR regions. Simple mixing with an H2Pc in toluene was found to exert no obvious changes in the spectroscopic properties of the Pc, although a considerable increase in the radiative lifetimes is observed for the Pc in the presence of the UCNPs. The singlet oxygen generation mediated by the red light excitation of the H2Pc mixed with UCNP was found to decrease in the presence of the NPs. , Original publication is available at http://dx.doi.org/10.1007/s11051-015-2889-5
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The lyric vision of W. H. Davies: pastoral, the unintelligible universe, community

  • Authors: Rabinowitz, Ivan Arthur
  • Date: 1973
  • Subjects: Davies, W. H. (William Henry), 1871-1940 -- Criticism and interpretation , English poetry -- 20th century , Poets, English -- 20th century -- Biography
  • Language: English
  • Type: Thesis , Masters , MA
  • Identifier: vital:2280 , http://hdl.handle.net/10962/d1007579 , Davies, W. H. (William Henry), 1871-1940 -- Criticism and interpretation , English poetry -- 20th century , Poets, English -- 20th century -- Biography
  • Description: From Introductory note: The Complete Poems of W.H. Davies (London: Jonathan Cape, 1963; rev. 1968) has been used throughout this study. Accordingly, unless otherwise stated, all citations of poem numbers and pagination refer to this text. Critical literature on the work of W.H. Davies is restricted in quantity and limited in scope. There are few comprehensive assessments of Davies as poet, autobiographer, novelist, or raconteur. Apart from such sources as Richard J. Stonesifer's full-length critical biography (1963), Lawrence Hockey's biographical monograph (1971), and Thomas Moult's anecdotal and historical appreciation (1934), critical material must be drawn from contemporary reviews, isolated articles in magazines such as The Catholic World and Fortnightly Review, and specific chapters in surveys of the poetry of the early twentieth century, although Davies is frequently alluded to passim in literary histories which deal with this period. Many of these studies favour biographical exposition and evaluation rather than descriptive analysis and discursive interpretation. A detailed chronology of Davies's works is included in Stonesifer's discussion. This thesis is not attempting to trace a line of development for two reasons. First, the Complete Poems gives no indication of date of composition or publication of particular poems, and the present writer has access only to the dates of publication of individual volumes as external evidence of a chronology, internal evidence being confined to such infrequent references as "the birds of steel" in Poem no. 236, p. 260. Secondly, the lyrics themselves do not, on the whole, evince much stylistic and thematic development, and the concern of this study is with recurrent themes and techniques dispersed throughout the oeuvre.
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  • Date Issued: 1973

The potential of a stratified ontology for developing materials in community-based coastal marine environmental education processes

Characterization of termite Trinervitermes trinervoides metagenome-derived glycoside hydrolases, the formulation of synergistic core enzyme sets for effective sweet sorghum and corncob saccharification, and their potential industrial applications

  • Authors: Mafa, Mpho Stephen
  • Date: 2019
  • Subjects: Termites , Metagenomics , Glucosides , Hydrolases , Enzymes , Feedstock
  • Language: English
  • Type: Doctoral theses , text
  • Identifier: http://hdl.handle.net/10962/72414 , vital:30044 , DOI https://doi.org/10.21504/10962/72414
  • Description: The current study investigated the biochemical properties of endo-glucanase (GH5E), exo-glucanase (GH5D), xylanase (GH5H) and endo-glucanase/xylanase (GH45), derived from the hindgut bacterial symbionts of a termite (Trinervitermes trinervoides) for their potential role in the biotechnology industry. All these enzymes, except GH5D, exhibited activities on cellulosic and xylan-rich polymeric substrates, which only displayed activity on p-nitrophenyl cellobioside. GH5D, GH5E, GH5H and GH45 enzymes retained more than 80% of their activities at pH 5.5 and also retained more than 80% of their activities at 40ºC. Furthermore, these enzymes were thermostable at 37ºC for 72 hours. GH5E, GH5H and GH45 were generally stable over a range of metal-ion. The kinetic parameters for GH5E were 5.68 mg/ml (KM) and 34.36 U/mg protein (Vmax). GH5D activity did not follow classical Michaelis-Menten kinetics, suggesting product inhibition. GH5H displayed KM values of 5.53, 95.03 and 2.10 mg/ml and Vmax values of 112.36, 144.45 and 180.32 U/mg protein on beechwood xylan, CMC, and xyloglucan, respectively. GH45 displayed a KM of 6.94 mg/ml and a Vmax of 12.30 U/mg protein on CMC. GH5D [cellobiohydrolase (CBH)] and a commercial CBHII (GH6) enzyme outperformed a commercial CBHI (GH7) enzyme when these enzymes hydrolysed β-glucan. GH5D and CBHII also displayed a higher degree of synergy on β-glucan but failed to show synergy on Avicel. We therefore concluded that GH5D and CBHII are β-glucan-specific cellobiohydrolases. The corncob (CC) and sweet sorghum bagasse (SSB) substrates were pretreated with lime, NaOH and NaClO2. Subsequent to pretreatment, these substrates were used to investigate if GH5D, GH5E, GH5H and GH45 could operate in synergy. Results revealed that out of 12 possible core enzyme sets constructed, only two (referred to as CES-E and CES-H) displayed higher activities on pretreated CC or SSB. Simultaneous synergy was generally the most effective mode of synergy during hydrolysis of alkaline pretreated SSB and CC samples by both CES-E and CES-H. Both core enzyme sets did not display synergy on oxidative pretreated substrates. These findings suggest that lime and NaOH are more effective pretreatments for CC and SSB substrates. We used PRotein Interactive MOdeling (PRIMO) software to demonstrate that GH5D protein structure is an (α/β)8 barrel with a tunnel-like active site. Enzymes with this type of protein structure are able to perform transglycosylation, a process in which GH5D produced methyl, ethyl and propyl cellobiosides. We concluded that the GH5D, GH5E, GH5H and GH45 enzymes possess novel biochemical properties and that they form synergy during the hydrolysis of complex substrates (SSB and CC). GH5D transglycosylation could be used to produce novel biodegradable chemicals with special properties (e.g. anti-microbial properties). In conclusion, our findings suggest that GH5D, GH5E, GH5H and GH45 can potentially be used to improve biorefinery processes. , Thesis (PhD) -- Faculty of Science, Biochemistry and Microbiology, 2019
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  • Date Issued: 2019

Pre-natal maternal stress and its potential correlation to attention deficit hyperactivity disorder (ADHD): An exploration into the potential correlation between the prevalence of chronic stress among a sample of Eastern Cape (South African) women during pregnancy and the diagnosis of Attention Deficit Hyperactivity Disorder (ADHD) in their children by the time they are of school-going age

  • Authors: Mukheibir, Adrienne Jayne
  • Date: 2019
  • Subjects: Attention-deficit hyperactivity disorder , Learning, Psychology of Adaptability (Psychology) Developmental psychology
  • Language: English
  • Type: Thesis , Doctoral , DEd
  • Identifier: http://hdl.handle.net/10948/42353 , vital:36648
  • Description: This study is an exploration into the potential correlation between the prevalence of chronic stress during pregnancy among a sample of Eastern Cape (South African) mothers and a diagnosis of Attention Deficit Hyperactivity Disorder (ADHD) in their school-going children. The theoretical framework on which this study is based is Barker’s Developmental Origins of Health and Disease (DOHaD) model. This model proposes that in utero development is influenced by the intrauterine milieu provided by the mother, where even a slight deviation to this environment during critical periods of development can lead to alterations in structure, physiology and metabolism in the child via fetal programming, which, depending on the cause, timing, duration and intensity of the stress, can cause pervasive, long-lasting consequences to disease and health later in life. This particular study examines existing literature regarding the phenomenon of how prenatal maternal stress (PNMS), as the adverse in utero influence, exerts a long-lasting negative effect on fetal development in the form of ADHD in childhood, and compares these findings to the circumstances surrounding a sample of 60 mothers whose school-going children have been diagnosed with ADHD. A mixed methods approach was used in this study, incorporating firstly a quantitative strand of Eastern Cape mothers where the prevalence and range of chronic stress during gestation was explored. From this sample, a qualitative sample was selected to provide more in-depth information regarding their stressful pregnancies. The flipside of the DOHaD model is that because of fetal developmental plasticity, positive in utero influences can undo the harmful effects caused by over-exposure to stress hormones, thereby enhancing fetal development. Unfortunately, this study highlighted how few mothers were aware of the positive influence a relaxation intervention programme could have on reducing stress which could alter the trajectory of their child’s development. The significant role that a genetic predisposition towards ADHD plays is not being debated. However, this study has provided much needed insight about PNMS as a negative influence on gestational development that could lead to the onset of, or exacerbation of ADHD traits.
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  • Date Issued: 2019

Ibali lama Hlubi

  • Authors: Ndawo, H. M. (Henry Masila)
  • Date: 194?
  • Subjects: Ndawo, Henry Masila Hlubi (African people) Xhosa language -- Texts
  • Language: Xhosa
  • Type: text
  • Identifier: http://hdl.handle.net/10962/47203 , vital:25688 , This manuscript is held at the Cory Library for Humanities Research at Rhodes University. For further information contact cory@ru.ac.za. The digitisation of this image was made possible through a generous grant received from the Andrew W. Mellon Foundation 2014-2017. , MS 16 337(a)
  • Description: Original author's text of Ibali lamaHlubi, published in 1945 by Lovedale Press.
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  • Date Issued: 194?

Establishing baseline data of Cradock and Tarkastad’s communities’ disease profile ahead of hydraulic fracturing and shale gas development

  • Authors: Olivera, Shanene
  • Date: 2019
  • Subjects: Medical care -- South Africa -- Eastern Cape , Diseases -- South Africa -- Eastern Cape South Africa -- Eastern Cape -- Statistics, Medical Surveys
  • Language: English
  • Type: Thesis , Masters , MCur
  • Identifier: http://hdl.handle.net/10948/43088 , vital:36734
  • Description: The South African government is investigating alternative ways to address the electricity crisis and has identified fracking as an alternative energy source. Specific areas have been identified for the implementation of Shale Gas Development. Various research studies have connected fracking to the incidence of certain diseases. Since Cradock and Tarkastad have been identified as prospective areas for the implementation of fracking, the primary aim of this study was to determine the disease profile of the community members in Cradock and Tarkastad. This baseline data could be utilised at a later stage as a benchmark when similar studies are conducted after the implementation of Shale Gas Development in these communities. A quantitative approach utilising a comparative descriptive survey design was adopted to conduct this study. The research population comprised all community members in Cradock and Tarkastad. A multi-staged sampling process was applied namely, cluster, convenient and stratified random sampling process; 489 respondents were included in the research sample. Two structured questionnaires and checklists were developed and administered by Registered Nurses, who were recruited as fieldworkers, to collect the data for the study. One questionnaire and checklist were designed and used for the age groups five-year and under population (n=43), and the other questionnaire and checklist were used for the over five-year population group (n=446). This allowed for the establishment of a disease profile of all ages in both areas. Descriptive and inferential statistics were used to analyse the data, and a pilot study was conducted before the primary study. The results of the study revealed the current disease profile in Tarkastad and Cradock. One of the objectives of the study was to compare the prevalence of diseases and abnormalities found in Cradock and Tarkastad. Thereafter the disease profiles were combined in a single profile for both Cradock and Tarkastad. Statistical analysis among the five-year-old and under population group indicated significant associations between area and physiological status, birthweight and physical conditions identified and monthly household income and physiological status (p<0.05). The over five-year-old population group revealed a greater significance between the independent and dependent variable categories than in the age group five years and under. The study revealed that South Africa’s burden of disease is evident in these findings with HIV/AIDS topping the list. The prevalence rates of HIV/AIDS and Hypertention are higher than the national prevalence rates, in Cradock and Tarkastad. It was also worthwhile to mention that Tarkastad faces more socio-economic challenges compared to Cradock. Recommendations were made for nursing practice, nursing education and further development of nursing research based on the research findings.
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  • Date Issued: 2019

Rhodeo, Vol. 22, No. 19

  • Date: 1968-09-12
  • Subjects: Grahamstown -- Newspapers , Journalism, Students -- South Africa , Rhodes University -- Activate , Rhodes University -- Students , Student newspapers and periodicals -- South Africa
  • Language: English
  • Type: Text
  • Identifier: vital:14593 , http://hdl.handle.net/10962/d1019465
  • Description: Rhodeo is the Independent Student Newspaper of Rhodes University. Located in Grahamstown, Rhodeo was established in 1947, and renamed in 1994 as Activate. During apartheid Rhodeo became an active part of the struggle for freedom of expression as part of the now defunct South African Student Press Union. Currently Activate is committed to informing Rhodes University students, staff and community members about relevant issues, mainly on campus. These issues range from hard news to more creative journalism. While Activate acts as a news source, one of its main objectives it to be accessible as a training ground for student journalists. The newspaper is run entirely by the students and is published twice a term. Activate is a free newspaper which receives an annual grant from the Rhodes University Student Representative Council, however, majority of its revenue is generated through advertising.
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  • Date Issued: 1968-09-12

Economics of Agricultural Development and Project: AGE 607

  • Authors: Obi, A , Kundhlande, G
  • Date: 2010-10
  • Language: English
  • Type: Examination paper
  • Identifier: vital:17676 , http://hdl.handle.net/10353/d1010071
  • Description: Economics of Agricultural Development and Project: AGE 607, honours examination November 2010.
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  • Date Issued: 2010-10

Urbanisation reshapes gendered engagement in land-based livelihood activities in mid-sized African towns:

  • Authors: Shackleton, Charlie M , Drescher, Axel W , Schlesinger, Johannes
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/176346 , vital:42686 , https://doi.org/10.1016/j.worlddev.2020.104946
  • Description: Most sub-Saharan African countries are experiencing accelerating rates of urban migration, which bring with it many opportunities and challenges for migrating households, urban planners, governments and local and national economies. At the household level urbanisation may drive changes in the allocation of household labour and consequently social and economic relations. Yet how these are manifest in land-based livelihood strategies of arable cropping, livestock husbandry and the collection of wild products in urban settings has rarely been considered. Here we examine the changing participation rates in land-based livelihood activities by male- and female-headed households along the rural–urban continua of six sub-Saharan African secondary towns. To capture the gendered changes in land-based livelihood strategies along the urban–rural continuum, 1156 randomly selected households were sampled along transects radiating out from the urban through the periurban to rural surrounds. Participation in different land-based livelihood strategies was recorded by means of a questionnaire.
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  • Date Issued: 2020

Impact of formulated soil types on growth performance, phytochemical constituents and pharmacological properties of solanum nigurm L. : a wild vegetable in the Eastern Cape Province, South Africa

  • Authors: Ogundola, Adijat Funke
  • Date: 2017
  • Subjects: Solanum Materia medica, Vegetable Medicinal plants -- South Africa -- Eastern Cape
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10353/8758 , vital:33519
  • Description: Solanum nigrum L. is a wild vegetable that is highly recognised for its high nutiritional and therapeutical purposes. However, proper identification of the plant is essential not only to plant scientists but to a wide range of users. Therefore, the plant’s roots, stems and leaves cultivated on different soil types were viewed under the Scanning Electron Microscope while the leaves were further viewed under the Light Microscope. significant increase was observed in densities of stomata, guard and subsidiary cells of leaves of S. nigrum grown on silty clay loam soil. The SEM analysis revealed abundant glandular and non-glandular trichromes on both surfaces of the leaves. The glandular trichome is known to be responsible for the storage of bioactive compounds for which this plant is well known. Cultivation was embarked upon, for the availability of the plant at all times. However, propagation was by seed alone, therefore, quality seed is necessary for cultivation. Study was carried out on seeds extracted from plants growing in the wild in Alice for the seed viability, germination and seedling emergence when subjected to different soil texture types and sowing depths. The seeds were 98.3 percent viable. Highest germination (94.66 percent) was recorded in sand paper scarification, 15, 20 and 25ºC. Continuous darkness and temperatures lower than 5ºC and higher than 35ºCwere detrimental to the seeds. Silty clay loam soil and a depth of 2 cm had the highest seedling emergence 90 percent and recommended as the ideal condition for seedlings emergence. The growth, yield and physiological response of S. nigrum to sandy clay loam, silty clay loam, clay loam, loam soils and control soil (sandy loam) were investigated in the glasshouse in two separate trials. The ANOVA analysed data results indicated that plant samples on silty clay loam significantly increased in height, stem girth, plant root, leaf area, number of leaves, number of branches, number of flowers, number of fruit bunch per plant dry weight, as well as weight of fruit bunch. However, plant samples grown on clay loam and loam soils recorded increased chlorophyll and produced dark green leaves. It is conceivable that silty clay loam soils have a strong ability to support the physiological growth and the yield of S. nigrum. These soils are therefore recommended for the cultivation of this plant. S. nigrum cultivated on these soils was evaluated for proximate compositions, anti-nutrients, vitamins A, C and E and mineral compositions using standard analytical methods. Using the translocation factor, the minerals’ toxicity accumulation levels in the plant were also determined. Accumulation of proximate parameters in the first and second trials are: ash (11.25-12.25 percent and 11.14- 11.54 percent), crude fibre (19.24-19.95 percent and 18.71-19.35 percent), protein (36.72-38.98 percent and 34.47-37.00 percent), phytate (0.84-1.17 and 0.88-1.15 mg/ml), saponnin (94.10-97.00 and 94.17-97.00 percent) and alkaloids (43.03-45.76 and 42.08- 44.10 percent) respectively. Vitamin A ranged between 117 and 137 mg/kg and betweens 108 and 128 mg/kg, vitamin C between 100 and 118 mg/kg and between 96 and 108 mg/kg and vitamin E between 250 and 269 mg/kg and between 227 and 261 mg/kg in the first and second trials respectively. The quantities of macro and micro-nutrients recorded in S. nigrum showed that this plant is a reservoir of nutrients. Plants cultivated on clay loam, silty clay loam and loam soils accumulated elevated nutritients compositions. Investigation was made on the ability of S. nigrum cultivated on different soil texture types to synthesise phytochemicals such as phenol, flavonoid, alkaloid proanthocyanidins, tannins, saponins and antioxidant. Highest concentrations of phenolics (73.87 mg/g), flavonoids (58.41 mg/g), proanthocyanidins (875.74 mg/g), tannins (49.32 mg/g), saponins (875.74 mg/g) and alkaloid (47.50 mg/g) contents were recorded in plant sample cultivated on silty clay loam soil. Also, highest radical scavenging power using DPPH (0.0102 mg/g), ABTS (0.1062 mg/g) and FRAP (0.8395 mg/g) were recorded in plant samples grown on silty clay loam and the next high values were recorded in plant samples grown on clay loam soil. It is showed in this study that silty clay loam soil and clay loam soils are the best soil types for cultivation of S. nigrum for increased antioxidant properties/ oxygen radical scavenging activities. Investigation was made on chemical compositions and antioxidant properties of essential oil extracts of S. nigrum shoot and root cultivated on different soil textures. The Gas Chromatography-Mass Spectrometry (GC-MS) profiling revealed variations in the quality index (QI) and number of chemical constituents of the oil of S. nigrum cultivated on different soil texture types. Geraniol and citronellol were two principal components of high quality common to oil from shoots and roots fromplants cultivated on all soil types. Results of DPPH and ABTS assays of the shoot oil showed that S. nigrum cultivated on clay loam soil had the highest antioxidant power. The presence of citronellol and geraniol among the major compounds is an indicaton of the plant’s role in defensive mechanisms. The work indicated that soil texture has effect on the quality, quantity and chemical compounds synthesised in the shoots and roots of S. nigrum. Antibacterial activities and the efficacy of S. nigrum cultivated on different soil types were carried out on reference strains of 4 gram-positive and 4 gram-negative bacteria. Toxicity evaluation of the plant’s acetone extract and water extract were also assessed on lethality of brine shrimp eggs. Plant water and acetone extracts exhibited strong antibacterial activity against Pseudomona aeruginosa, acetone extracts against Bacillus cereus, Listeria and Escherichia coli. Significantly (p< 0.05) low concentration (0.25 mg/mL) of acetone extracts from plant shoot cultivated on silty clay loam and clay loam soils inhibited B. cereus and P. aeruginosa. Antimicrobial activities of extracts of plant cultivated on clay loam appeared to be more superior to extracs from plants grown on other soil types. Toxicity of the plant extracts (water and acetone) was concentration and time dependent. The LD50 values for all plant extracts were greater than 1000 mg/mL which showed they are non-toxic.
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  • Date Issued: 2017

Petrogenesis of the New Amalfi sheet a highly differentiated Karoo intrusion

  • Authors: Williams, Craig Milton
  • Date: 1995
  • Subjects: Petrogenesis -- South Africa -- Eastern Cape -- Karoo , Geochemistry -- South Africa -- Eastern Cape -- Karoo
  • Language: English
  • Type: Thesis , Masters , MSc
  • Identifier: vital:4985 , http://hdl.handle.net/10962/d1005597 , Petrogenesis -- South Africa -- Eastern Cape -- Karoo , Geochemistry -- South Africa -- Eastern Cape -- Karoo
  • Description: The New Amalfi Sheet is a highly differentiated tholeiitic intrusion which is situated between the towns of Matatiele and Swartberg in East Griqualand. It lies within the Central area of the Karoo Igneous Province. Rock types range from dolerites at the base and top through to a highly differentiated granophyre which is found as a 'sandwich horizon' within the top half of the sheet. The most evolved granophyre represents 15.86% of the initial liquid, which was found to be very similar in composition to the average Lesotho-type magma of Marsh and Eales (1984). The paragenetic sequence was found to be chromite → olivine → plagioclase → pigeonite and augite. Cumulus magnetite and ilmenite enter the paragenetic sequence together with immiscible sulphide droplets after 35% crystallization. In the late stages of crystallization, augite changes composition towards ferrohedenbergite. The reappearance of iron-rich olivine coincides with the disappearance of pigeonite and apatite appears as a cumulus phase for the first time after 70% crystallization. Granophyric intergrowth, which contains coarse perthitic Kfeldspar, becomes the most abundant modal entity within the most evolved granophyres. Differentiation was dominated by fractionation of plagioclase and pyroxene, with subordinate olivine and opaque-oxide fractionation. A minor amount of assimilation of country rock occurred within the topmost granophyres. The intrusion has been dated, using the Rb-Sr isochron method, at 178.37 ± 5.52 Ma. Extensive subsolidus deuteric alteration has resulted in the formation of a complete series of hydrothermally altered clinopyroxenes which are enriched in CaO but depleted in TiO₂ compared to the unaltered magmatic clinopyroxenes. It has also resulted in the formation of abundant vermiform ilmenite in the most evolved rocks, recognized by the fact that this phase is enriched in MnO compared to magmatic ilmenites. The very iron-rich orthopyroxene, ferrohypersthene, was found to have crystallized, during cooling of the sheet from the intercumulus liquid. Olivine in the dolerite re-equilibrated with the intercumulus liquid, becoming more iron-rich in composition.
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  • Date Issued: 1995

Knowledge and attitudes of professional nurses towards HIV and AIDS patients at the Libode District Health Services in the Eastern Cape Province

  • Authors: Gedu, Grace Nontuthuzelo
  • Date: 2011-12
  • Subjects: Rural health services , AIDS (Disease)
  • Language: English
  • Type: Master's theses , text
  • Identifier: http://hdl.handle.net/10353/24610 , vital:63213
  • Description: This study was conducted at the Libode District Health Services amongst professional nurses who render services to HIV and AIDS patients. Generally, caring for HIV positive patients, nurses need to be knowledgeable about the transmission of the HIV virus, in order to render quality care to the patients. They also need to be sensitive and to demonstrate positive attitudes towards the patients. It was unknown whether the professional nurses at the Libode District Health Services are knowledgeable or not regarding HIV and AIDS. Their attitudes towards the HIV positive patients, were also unknown. Not knowing the knowledge and attitude of professional nurses regarding HIV and AIDS has the potential to compromise the quality of nursing care rendered to the patients. The purpose of the study was to explore and describe the level of knowledge of professional nurses regarding HIV and AIDS well as their attitudes towards the HIV-positive patients so as to make recommendations for quality patient care based on the results. A quantitative explorative descriptive research design was used to examine the level of knowledge about HIV and AIDS as well as the attitudes of professional nurses to HIV and AIDS patients. The target populations were the 218 professional nurses working at the Libode District Health services who had nursed HIV positive patients. A simple random sampling method was used to select a sample of 120 participants. A structured self-administered questionnaire was used to obtain data. The questionnaire consisted of a section on the demographic profile of the participants, and two other sections for responses on knowledge and attitudes. Data were analyzed using Statistical Package for the Social Sciences (SPSS) version 17.0 software for consistency of the twenty (20) items in the questionnaire. Findings showed that nurses of Libode District Health Services had an approximately fair amount of knowledge. The majority (79percent) of participants scored above the cut-off point of 24. Twenty one percent (21percent) scored below 24. On attitude, the majority (76percent) had scored below the cut-off point of 36. Recommendations were that professional nurses of Libode District Health Services, need to be exposed to ongoing training on HIV and AIDS to increase their knowledge about HIV and AIDS and to ensure that they demonstrate positive attitudes towards HIV and AIDS patients. , Thesis (MSc) -- Faculty of Science and Agriculture, 2011
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  • Date Issued: 2011-12

Technauriture: Multimedia Research and Documentation of African Oral Performance

  • Authors: Kaschula, Russell H
  • Date: 2012
  • Language: English
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/175223 , vital:42554 , ISBN 9783643901309
  • Description: This paper seeks to assess the contribution of technology to the preservation and popularizing of oral performance in Southern Africa. An example will be provided which looks at the oral poetry, izibongo, produced by Xhosa oral poet Bongani Sitole (both in book and technological form). It will trace this poetry from the moment it was orally produced, through to the technologising and publication of this poetry in book form and on a website. A number of websites will also be analysed. The initial part of the paper provides a contextual analysis of selected poetry. This genre will also be compared (in terms of technological influence) with more contemporary Southern African performers such as the story-teller, Gcina Mhlophe as well as Lebo Mashile and Botsotso, spoken word artists and the oral poet Zolani Mkiva. The latter part of the article concentrates on issues related to technology and its relationship to the oral and written word.
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  • Date Issued: 2012

A baseline study of teacher and learner perspectives of language demands in science classrooms in the Nelson Mandela Bay Metropole

  • Authors: Woods, Tracey
  • Date: 2017
  • Subjects: Language arts -- Correlation with content subjects -- South Africa -- Nelson Mandela Bay Municipality , Interpersonal communication -- South Africa -- Nelson Mandela Bay Municipality Communication in education -- South Africa -- Nelson Mandela Bay Municipality Communicative competence -- South Africa -- Nelson Mandela Bay Municipality
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: http://hdl.handle.net/10948/21153 , vital:29451
  • Description: Globally, one of the challenges in science education is providing equitable access to increasingly diverse learners in equally diverse learning contexts. In South Africa, science is taught to learners by means of English, which is the preferred language of instruction even if it is only spoken by 9.6% of the South African population. In the Eastern Cape, the majority of the population speak isiXhosa and the minority speak English. Parents of isiXhosa-speaking children often choose schools where English is the language of learning and teaching (LoLT) as they feel their children will have better career opportunities as English is considered to be the language of economic power. The aim of this study was to determine teachers’ and learners’ perspectives of language in science classrooms. To this end, a baseline study was conducted. A quantitative research method was used and data were collected through questionnaires. The research found that English is the preferred language for teaching and learning, even though the majority of the participants were isiXhosa home-language speakers. In addition, learners in South African whose home language is not English do not have the necessary language skills to cope with the switch to English as LoLT. Science teachers are therefore faced with two distinct challenges: firstly teaching content and secondly teaching the LoLT, if it is not the learners’ home language. The major difficulty experienced by learners when learning science is learning the language of science, as science is regarded as having a language of its own, with its own specific register and discourse. Thus, for many learners, learning the language of science is a challenge as it contains unfamiliar technical words and everyday words that have specialised scientific meanings (e.g. diagrams, procedures, table, current and force). English is seen as the language in which to explore these concepts. A conclusion that can be drawn is that English is regarded as the language in which to learn science thus reflecting the continued hegemony of English.
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  • Date Issued: 2017

Synthesis and biological evaluation of novel thiazole-based compounds

  • Authors: Olawode, Emmanual Oladayo
  • Date: 2016
  • Language: English
  • Type: text , Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10962/62955 , vital:28325
  • Description: Thesis embargoed for one-year period. Expected date of release: April 2019
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  • Date Issued: 2016

A new species of Tropheus (Pisces: Cichlidae) from Lake Tanganyika

  • Authors: Axelrod, G S (Glen S.) , Rhodes University. J.L.B. Smith Institute of Ichthyology
  • Date: 1977-11
  • Subjects: Cichlids , Tropheus , Freshwater fishes -- Tanganyika, Lake
  • Language: English
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/69803 , vital:29581 , Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB)) Periodicals Margaret Smith Library (South African Institute for Aquatic Biodiversity (SAIAB))
  • Description: Online version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 17 , Tropheus polli, a sp. nov. (Pisces: Cichlidae) from Lake Tanganyika, is described and compared with T. moorii Boulenger 1898, T. annectens Boulenger 1900, T. duboisi Marlier 1959, T. brichardi Nelissen & Thys 1975, and T. moorii kasabae Nelissen 1977. Included are detailed morphometric data with a figure and colour plate, a lower pharyngeal bone description with electron micrograph scans, and a type locality map.
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  • Date Issued: 1977-11

The role of teacher cognition in the integration of technology into English teaching: a case study

  • Authors: Baron, Elizabeth Mary
  • Date: 2011
  • Subjects: English teachers -- Effect of technological innovations on English teachers -- Psychology English teachers -- Attitudes Language and languages -- Study and teaching -- Computer-assisted instruction Educational technology Computer-assisted instruction
  • Language: English
  • Type: Thesis , Masters , MEd
  • Identifier: vital:1753 , http://hdl.handle.net/10962/d1003637
  • Description: Technology, in one or more of its various forms, is now a part of everyday life for most South African citizens. Many schools are equipped with various forms of technology, at great cost to sponsors, schools, parents or the government. However, this technology is not always exploited and full use is not made of it. As access is not the issue, other factors needed to be considered: in this case, teachers’ beliefs, attitudes and knowledge. This thesis explores the cognitive factors which affect the acceptance and use of technology. Teacher cognition and the factors which influence teacher cognition were examined. Following Borg, teacher cognition is defined as “the unobservable cognitive dimension of teaching – what teachers know, believe and think” (Borg, 2003, p. 81). Teacher cognition determines whether or not a teacher will use technology, if the external barrier of access is removed. In order to study the various aspect of teacher cognition, a case study was performed, which studied 6 teachers at 4 schools. All the schools in this study had some level of access to technology. Following Borg, initial experiences with the educational system (i.e. the teacher’s experience as a learner), teacher training, the context the teacher worked in (as well as social factors and private use) and classroom experience were all examined in order to discover the factors which most affect technology acceptance in teaching. The findings show that having easy access to well-maintained and functioning technology cannot be underestimated. In the study, support from other teachers, particularly those in leadership roles, led to an increase in technology use. This support needed to be explicit; general support did not seem to be effective. These findings suggest that technology integration needs to happen at a ‘whole school’ level.
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  • Date Issued: 2011

Epitaxial growth and characterisation of CuGaS2

  • Authors: Branch, Matthew Stewart
  • Date: 2006
  • Subjects: Epitaxy , Chalcopyrite , Semiconductors
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: vital:10541 , http://hdl.handle.net/10948/438 , http://hdl.handle.net/10948/d1012893 , Epitaxy , Chalcopyrite , Semiconductors
  • Description: In this work, the growth and characterisation of the chalcopyrite semiconductor CuGaS2 is presented. The purpose of this study is to gain a better understanding of the defect chemistry of this class of materials through a systematic study relating the structural and optical properties to the composition of thin films grown by metalorganic vapour phase epitaxy. Details associated with the optimisation of the growth process are presented in a format relating the changes in the composition and morphology to variations in the growth process. The structural properties of thin films grown on GaAs(001) substrates are described. A dominance of polycrystalline growth is found to occur for Cu-rich material, whereas near-stoichiometric to Ga-rich material is typified by epitaxial growth. Secondary phases are identified by X-ray diffractometry and Raman spectroscopy for severely non-stoichiometric material. In some cases, the formation of the cubic zincblende and CuPt polytype of CuGaS2 are identified by transmission electron microscopy. It will be shown that changes in the Cu/Ga ratio of the solid strongly influence the photoluminescence response of the layers. Weak excitonic luminescence is observed for both slightly Ga-rich and Cu-rich material. Near stoichiometric layers exhibit luminescence centered at ~2.4 eV. Cu-rich layers are dominated by a line occurring at ~2.1 eV, whereas a different line at ~2.25 eV dominates for Ga-rich layers. A clear picture emerges of the radiative mechanisms dominating for Cu-rich and Ga-rich layers.
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  • Date Issued: 2006
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