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Evaluating the potential effects of microplastics at environmentally realistic concentrations in South African freshwater systems
Get PDFMicroplastic pollution is spatially broad, microplastics can be found in various habitats including freshwater systems. Microplastic exposure to aquatic organisms has been associated with several physical impacts on aquatic organisms from multiple trophic levels such as; increased immune response, a decrease in food intake, excessive loss of weight, reduced growth rate, reduced energy and adverse effects on successive generations. However, these significant effects of microplastics exposure have been observed mostly in studies that use concentrations of microplastics that exceed environmental concentrations. Therefore, there is an overall lack of research on the effects of microplastics on freshwater organisms using environmentally realistic concentrations, especially in the Southern Hemisphere. A series of toxicity tests were used to expose a range of taxa including Tilapia sparrmanii, Caridina nilotica, and Melanoides tuberculata to different environmentally realistic concentrations of microplastics of different polymers. The study results show that the environmentally realistic concentrations had no statistically significant effects on most of the chosen test organisms and selected study endpoints, except for T. sparrmanii microplastic particle egestion and growth in polyethylene exposures which produced significant results. Although this study showed that at environmentally realistic concentrations and 21 days of exposure, minute effects on the test taxa were detected, various studies have proven that with longer exposure to microplastics, significant effects on freshwater organisms can be detected. Additionally, studies using concentrations higher than the current environmental concentrations have recorded significant effects on organisms and therefore, with increasing concentrations in the environment, more significant effects may be observed. Therefore, plastic pollution in the environment should be reduced as microplastics are in continuous production and circulation, and microplastic concentrations in freshwater environments are predicted to increase.Thesis (MSc) -- Faculty of Science, Institute for Water Research, 202
The cognitive remediation of attention in HIV-associated neurocognitive disorders (HAND): A meta-analysis and systematic review
Get PDFDespite medical advances in Highly Active Antiretroviral Therapy (HAART), patients living with HIV continue to be at risk for developing HIV-associated neurocognitive disorders (HAND). The optimization of non-HAART interventions, including cognitive rehabilitation therapy (CRT), shows promise in reversing the impact of HAND. No data exist indicating the efficacy of CRT in remediating attention skills following neuroHIV. This paper presents a meta-analysis of randomised and non-randomised controlled trials (RCTs) to remediate attention skills following HIV CRT
Natural resource rents and public debt in selected resource in rich Sub-Saharan AfricanCountries
Get PDFMany Sub-Saharan African countries are endowed with natural resources and yet their public debts are keeping on ballooning. The skyrocketing of these debts can cause a public debt crisis which can further bite on the poor who are already living miserable lives in resource-rich countries. This study examines the impact of natural resource rents on public debt in Sub-Saharan African (SSA) countries from 2000 to 2020, utilising the panel ARDL technique. The main objective of this research work was to investigate the relationship between natural resource rents and public debt in selected resource-rich Sub-Saharan African countries. The panel ARDL technique employed in this study strengthens the analysis by considering both short-run and long-run dynamics. In the short run, a significant and negative relationship is observed between natural resource rents and public debt, aligning with the theoretical expectations of resource-rich economies benefiting from increased revenues. However, in the long run, a contrasting pattern emerges, indicating that natural resource rents contribute to an increase in public debt, highlighting the challenges associated with the resource curse phenomenon. The empirical analysis reveals noteworthy findings with implications for theory, practice, and policy. The findings underscore the need for careful fiscal management and prudent policies in resource-rich countries to avoid excessive debt accumulation over the long term. This highlights the importance of implementing effective governance mechanisms, transparency, and accountability frameworks to manage natural resource revenues responsibly. In conclusion, this study contributes to the understanding of the relationship between natural resource rents and public debt in SSA countries. It emphasizes the importance of balancing short-term fiscal benefits with long-term sustainability and provides valuable insights for policymakers to design and implement effective resource management strategies.Thesis (Masters) -- Faculty of Economics and Financial Sciences, 202
A Spectre Haunting a Journalist and a Devastated Land
Get PDFIn 1986, British journalist Fred Bridgland published the first, and to date the only full-length English language biography of Jonas Savimbi, 1 the leader of UNITA (National Union for the Total Independence of Angola). The mammoth volume raised the profile of Savimbi and elevated the guerrilla to a pantheon that included his idol Mao Zedong and his reputed friend, Che Guevera. 2 Apparently unbeknown to Bridgland, Savimbi was already exhibiting the worst excesses of Mao: the elimination of all potential rivals to his ironclad control of the rebel armed group. What Bridgland could not have foreseen was that Savimbi was destined to die in the same undignified manner as Guevera with the reputation that he had helped cultivate in tatters (255)
Anton Reichenow and the birds of Africa
No full textThe first handbook of the birds of Africa was completed in 1905 by Anton Reichenow (1847–1941). Based in the Berlin museum for almost 50 years, he described 152 African taxa that are still recognised as valid species today, and was considered by his contemporaries as a key figure in the development of African ornithology
An audit of patients with new onset stroke and associated barriers to thrombolysis of hyperacute strokesat a tertiary level hospital in the Eastern Cape
Get PDFGlobally and in South Africa stroke is a leading cause of morbidity and mortality. In 2006, the Joint World Congress of Stroke declared stroke a ‘catastrophic illness’ in South Africa. This declaration aims to focus the attention of policymakers on the impact of stroke and engage with them to intervene. Local stroke data is needed to make informed and relevant policy changes. Data is also required to start multi-level initiatives regarding stroke prevention and care. This study aims to analyse the demographic profile of stroke and assess the quality of stroke care using time-based performance measures at Livingstone Tertiary Hospital in the Eastern Cape. Methodology The study is a descriptive, retrospective chart review of patients presenting with an acute stroke to Livingstone Tertiary Hospital Emergency Department over a 12 month period. Demographic data, stroke risk factors, patient comorbidities and mode of transport were collated and analysed. Time parameters were used to ascertain delays within the stroke care pathway of patients and factors precluding patients from thrombolysis were identified. Results The study included 403 eligible patients, 54% of the patients of whom were female. The majority of those were of Mixed-race ethnicity (49%) and aged between 50 and 79 years. Hypertension (71%) was the most common comorbidity followed by smoking (31%) and diabetes mellitus (24%). The median time from onset of symptoms to presentation to hospital was 12 hours 23 minutes (I.Q 20hrs 34min). The average time from arrival to being III seen by a doctor was 1 hour 57 minutes (I.Q 1hr 59min) and the time from arrival to radiological imaging was 17 hours 6 minutes (I.Q. 8hrs 28min). 375 patients had radiological imaging, 58% (n=217) had evidence of an ischaemic stroke compared to 21% (n=80) who had signs of an intracranial haemorrhage. Of the study cohort, 99 (25%) of all stroke patients presented within the 4.5hr thrombolytic window, 68 (32%) of which were ischaemic strokes. However, in-hospital time delays precluded 35% of these patients from thrombolysis. A further 33% of patients had other contraindications to thrombolysis and 32% were not offered thrombolysis based on the clinical discretion of the doctor. Conclusion This study highlights the burden of stroke within Port Elizabeth, located in the Western Region of the Eastern Cape. Risk factor modification and disease control is imperative in reducing the prevalence and impact of stroke. The major precluding factor in stroke patients not being offered thrombolysis is a delay in arrival to hospital. Public education and awareness initiatives need to focus on addressing this issue. The clinical discretion of the treating physician significantly influences the decision to thrombolyse patients with an acute stroke. In-service training can address physicians’ perceptions regarding the benefits of thrombolysis as a treatment option.Thesis (Masters) -- Faculty of Medicine and Health Sciences in brach of emergency medicine, 202
Changing anthropocentric ideology through a children’s storybook, tales of the Turtle
Get PDFThis research study aims to produce ‘ecological art’ in the form of a children’s wordless picture book, that can be distributed to many schools in South Africa, bringing awareness to ocean conservation and the effects of the environmental crisis. To do this, a theoretical study has been conducted, synthesising numerous theoretical frameworks, to gather information to create an appropriate children’s picture book. The study first considers environmental philosophy, such as that presented by Spinoza and Naess for instance. At this point, focus also falls on how prevailing societal practices, spurred on by neoliberal capitalism, prevents caring approaches to nature. Then, there is also a scientific side to the study. Research on the Benguela and Agulhas currents of South Africa are offered, as an entry point to seeing how and what is being affected by climate change, also looking at the aquatic animals and their fates. Additionally, an analysis is made regarding representation of different types of megafaunas through forms of media throughout the ages, which helps with selecting which charismatic animals to feature in Tales of the Turtle. Thereafter, research is laid out regarding the relationship between westernised and indigenous teaching approaches. Here specific focus falls on Kenneth Mlungisi Ngcoza’s ‘third space’ and Helio Manuel García-Campos’s ‘interdisciplinary space.’ Finally, the design and illustrative techniques, such as the rule of thirds, line strength, and colour contrasts, are observed to produce an appropriate wordless picture book. South Africans’ relationships with books, access to books, and the relationships that South Africans have with westernised teaching, were also taken into consideration. The overall study is capped by the actual children’s storybook, Tales of the Turtle.Thesis (MA) -- Faculty of Humanities, School of Music, Art and Design, 202
Signposts on the road toward transformative governance: how a stronger focus on diverse values can enhance environmental policies
Get PDFTransformative change toward sustainability is increasingly recognized as inevitable to avoid the collapse of socioecological systems. However, for a deep and system-wide transformation, governance approaches and policymaking need to be changed too. This paper discusses how a diverse value approach in environmental policymaking could be undertaken to foster transformative governance that can further lead to system-wide transitions. Based on the analysis of different policy options’ transformative potential, we argue that the more diverse values addressed by a policy instrument, the bigger its transformative potential. Weaving values into policy decision-making is possible at several junctures of the policy process, but context-specificities should always be considered, and capacities must be enhanced at all levels, both for public and private actors
Assessing the impact of COVID-19 on South African organisation’s way of working: A Black Management Forum Perspective
Get PDFThe aim of this study was to examine impact of Covid-19 on organisation’s work environment in South Africa, based on Black Management Forum’s views. The outbreak of Covid-19 led to disruption on organisation’s ways of working, this was due to lockdown rules and regulations, restrictions imposed by Government to curb the spread of the virus. The study used quantitative method approach; online survey questionnaire was distributed to recruited Black Management Forum (BMF) members who were willing to voluntarily participate via an email and WhatsApp platform. These members were sampled using convenience and snowball non-probability sampling techniques. The concepts of the study were scientifically hypothesised to determine whether such associations exist within the context of the work environment and productivity within the different corporate sector of industries in South Africa. The study findings confirmed that most organisations were impacted, and they changed their ways of work by implementing mostly work partly from home (WPFH) hybrid work model. The study findings also revealed that, workload was more during the pandemic than before, as results of changed work environment. Other finding from the study indicated that most employees adapted well to changes, understood the need for change and they performed well. Most employees also felt more productive and well supported and respected by managers. Service sectors were more impacted than other sectors and they showed more productivity as well. Most respondents felt that the adopted ways of working would remain post-pandemic and that they prefer this hybrid model of working because it gave them an opportunity to manage their own time. vii The research is significant as it critically examined how a pandemic can create organisational changes and the extent to which organisations must adjust. The research also provides policy recommendations that could assist corporate organisations in adopting new ways of working.Thesis (PhD) -- Faculty of Faculty of Business and Economic Sciences, 202
Saul Msane: friend or foe of the people? The life of the late nineteenth to early twentieth centuries South African politician and journalist
Get PDFSaul Msane was a prominent founding member of the ANC and an active journalist and editor of the ANC newspaper Abantu-Batho. His career generated controversy. Towards the end of his life, he had a feud with his colleagues in the African National Congress (henceforth Congress) that led to him being labelled isitha sabantu, “the enemy of the people” for his refusal to support the Shilling strike of 1918, an accusation which was retracted a year after his death in 1919. The label of isitha sabantu levelled against Msane, had the effect of ending his political prominence in the Transvaal, forcing him to relocate to kwaNongoma where he died shortly thereafter. Msane’s years in the Congress amounted to about seven years, between 1912, the founding of the Congress, and the demise of his career in 1919. Msane’s seven years in Congress were characterised by controversies, clashes, and conflicts owing to his perceived elitism. In Congress historiography Msane is an obscure and elusive figure, he lives here and there in a footnote, as a supporting statement or a mentioned in mere passing. His marginalisation reveals some of the gaps within the history of Congress and invites us to write about those who did not emerge from the history of Congress necessarily as heroes. This thesis sets out to write a biography of Msane and document his political career beyond that one moment in which he came to be “isitha sabantu”. While Msane’s Congress career was comparably short and filled with tensions, an archive of his life exists. This study is an exploration of that archive to reconstruct the biography of a once prominent leader who dies in political exile from the Congress movement. This thesis sets out to do two key things in relation to reconstructing Msane’s life: Firstly, it reconstructs the longer biography of Msane’s political life by drawing on the existing archives, and thus filling in the South African historical record in that regard. Secondly, at the broader conceptual and historiographical level, it argues that the controversies surrounding Msane’s persona and character illustrate that conceptions of elitism and the nature of being ‘elite’ were key to the politics of Congress at the time.U-Saul Msane wayengomunye wabasunguli beqembu lika-African National Congress (uKhongolose) futhi eyIntatheli nomhleli wephephandaba i-Abantu-Batho. Umsebenzi ayewenza waba nezingqinamba eziningi ngokwezepolitiki. Ngasekugcineni kwempilo yakhe waba nokungazwani nabaholi ayesebenza nabo kuKhongolose okwadala ukuba abizwe ngesitha sabantu ngenxa yokuba engavumelananga nesiteleka sango-1918 lapho abasebenzi babelwela ukukhushulelwa amaholo. Leligama lokubizwa ngesitha sabantu lahoxiswa ngo 1919 sekudlule unyaka engasekho emhlabeni. Lokubizwa ngesitha sabantu kwalilimaza igama lakhe kwezepolitiki e-Transvaal waze wathutha wayohlala kwaNongoma nokuyilapho ashonela khona. Iminyaka uMsane ayisebenzele uKhongolose yaba isikhombisa, kusukela ekusungulweni kwayo ngo 1912 kuze kufike ekulimaleni komsebenzi wakhe wezepolitiki ngo 1919. Kuleminyaka eyisikhombisa umsebenzi wakhe kuKhongolose wawubhekene nokugxekwa okukhulu nokubukeka njengomuntu onokuzenza ngcono kunabanye abantu. Emlandweni kaKhongolose uMsane akavezwa ngendlela emfanele, kukhulunywa ngaye kudlulwa nje. Lokunganakwa kukaMsane emlandweni kaKhongolose kusiphoqa ukuba sibhale ngabaholi abangaqakanjiswa. Lolucwaningo luveza umlando kaMsane ngokujulile ngaphezu kwangalesikhathi abizwa khona ngesitha sabantu. Noma umsebenzi kaMsane kuKhongolose wabamfushane kunabanye futhi ugcwele izinto kodwa noko ingobo yawo ikhona. Lolucwaningo lucubungula lengobo ukuhlaziya nokubhala kabusha umlando wengqalabutho eyagcina ishonela ngaphandle kombutho kaKhongolose. Loluphando lifisa ukwenza izinto ezimbili: Okokuqala, ibhala kabusha umlando omude wezepolitiki kaMsane kusetshenziswa ulwazi olukhona. Loku kuzosiza ukunothisa umlando wezepolitiki wezwe laseNingizimu Afrika. Okwesibili, ezingeni lobunzululwazi, lolucwaningo luveza ukuthi izinkinga uMsane ahlangabezana nazo zazisukele endleleni okwakubukwa ngayo indaba yokucwasana ngazinga empilo abantu, kwakuyinto ejulile kuKhongolose ukubukeka kwabanye sengathi bazenza ngcono.Thesis (PhD) -- Faculty of Humanities, History, 202