University of South Africa

About: University of South Africa is a education organization based out in Pretoria, South Africa. It is known for research contribution in the topics: Context (language use) & Population. The organization has 8478 authors who have published 19960 publications receiving 237688 citations. The organization is also known as: Unisa.

Factors that hinder the growth of small businesses in South African townships

Abstract: Purpose – The purpose of this paper is to examine factors that hinder the growth of small businesses in South African townships, to create awareness of these factors and to develop guidelines for small business owners to promote successful business enterprises.Design/methodology/approach – The study was exploratory, descriptive and qualitative in nature. Semi‐structured interviews were used to gather data. A response rate of 93 per cent was obtained from a sample of 30 businesses.Findings – The slow growth rate can be attributed partly to the lack of support that small, medium and micro‐enterprises receive from support institutions, and partly to their own internal weaknesses. The findings furthermore revealed that the most common causes impeding business growth are a lack of legal knowledge, a lack of funding and a general lack of business acumen.Research limitations/implications – The study was limited to the micro‐, very small and small sectors of small businesses. Medium‐sized businesses were not incl...

Exploring rigour in autoethnographic research

Abstract: The changing face of qualitative research has opened up discourses on the validity and rigour of research processes and products. A current debate is whether the criteria traditionally used to judge the rigour of quantitative research are appropriate to assess the academic integrity of qualitative research including autoethnography. The purpose of this article is to appraise views on the academic rigour, validity and scientific accountability of research in general and autoethnographic research in particular. The researcher reports on issues of rigour in conducting autoethnographic research from her own experience and that of published autoethnographic researchers. The issue of relevant appraisal criteria against which the research integrity and rigour of autoethnographic studies can be assessed is investigated. It is concluded that the academic rigour of autoethnographic studies should be established to enhance its credibility and value and that the criteria used need to be judiciously determined...

Punicalagin Green Functionalized Cu/Cu2O/ZnO/CuO Nanocomposite for Potential Electrochemical Transducer and Catalyst.

Abstract: A novel ternary Punica granatum L-Cu/Cu2O/CuO/ZnO nanocomposite was successfully synthesised via green route. In this work, we demonstrate that the green synthesis of metal oxides is more viable and facile compare to other methods, i.e., physical and chemical routes while presenting a potential electrode for energy applications. The prepared nanocomposite was characterised by both microscopic and spectroscopic techniques. High-resolution scanning electron microscopy (HRSEM) and X-ray diffraction (XRD) techniques revealed different transitional phases with an average nanocrystallite size of 29–20 mm. It was observed that the nanocomposites changed from amorphous-slightly crystalline Cu/Cu2O to polycrystalline Cu/Cu2O/CuO/ZnO at different calcination temperatures (room temperature-RT- 600 °C). The Cu/Cu2O/ZnO/CuO metal oxides proved to be highly crystalline and showed irregularly distributed particles with different sizes. Meanwhile, Fourier transform infrared (FTIR) spectroscopy confirmed the purity while together with ultraviolet-visible (UV-Vis) spectroscopy proved the proposed mechanism of the synthesised nanocomposite. UV-Vis showed improved catalytic activity of the prepared metal oxides, evident by narrow band gap energy. The redox and electrochemical properties of the prepared nanocomposite were achieved by cyclic voltammetry (CV), electrochemical impedance (EIS) and galvanostatic charge-discharge (GCD). The maximum specific capacitance (C s) was calculated to be 241 F g−1 at 50 mV s−1 for Cu/Cu2O/CuO/ZnO nanoplatelets structured electrode. Moreover, all the CuO nanostructures reveal better power performance, excellent rate as well as long term cycling stability. Such a study will encourages a new design for a wide spectrum of materials for smart electronic device applications.

Antioxidant and Photocatalytic Activity of Aqueous Leaf Extract Mediated Green Synthesis of Silver Nanoparticles Using Passiflora edulis f. flavicarpa .

Abstract: The purpose of this study is to minimize the negative impacts of synthetic procedures and to develop environmentally benign procedures for the synthesis of metallic nanoparticles. In the present study, Passiflora edulis f. flavicarpa (P. edulis) aqueous leaf extract mediated green synthesis of silver nanoparticles are described. The synthesized silver nanoparticles were characterized by UV-Vis Spectroscopy, Fluorescence Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) Transmission Electron Microscopy (TEM) and Cyclic Voltammetry (CV). The silver nanoparticles (AgNPs) showed antibacterial activities against both gram positive (staphylococcus) and gram negative (Escherichia coli) bacteria. The efficacy of the synthesized silver nanoparticles (AgNPs) was demonstrated as catalyst in the photocatalytic degradation of Methyl Orange (MO) and Methylene Blue (MB) dyes which were measured spectrophotometrically. The study revealed that biosynthesized silver nanoparticles using Passiflora. edulis f. flavicarpa, plant extract was found to be very effective as antioxidant agent.