Showing items 21 - 40 of 257

Your selections:

Occurrence of Indo-Pacific bottlenose dolphins (Tursiops aduncus) off the Wild Coast of South Africa using photographic identification:

- Caputo, Michelle, Bouveroux, Thibaut, Froneman, P William, Shaanika, Titus, Plön, Stephanie

  • Authors: Caputo, Michelle , Bouveroux, Thibaut , Froneman, P William , Shaanika, Titus , Plön, Stephanie
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/160367 , vital:40439 , https://0-doi.org.wam.seals.ac.za/10.1111/mms.12740
  • Description: The present study represents the first reported boat‐based photographic identification study of Indo‐Pacific bottlenose dolphins (Tursiops aduncus) off the Wild Coast of southeast South Africa. This area is known for the annual sardine run, which attracts apex predators to the region during the austral winter. Dedicated photo‐identification surveys were conducted along this coast at three different study sites in February, June, and November of each year from 2014 to 2016.
  • Full Text:
  • Date Issued: 2020

PKS 2250−351: A Giant Radio Galaxy in Abell 3936

- Seymour, N, Huynh, M, Shabala, S S, Rogers, J, Davies, L J M, Turner, R J, O'Brien, A, Ishwara-Chandra, C H, Thorne, J E, Galvin, T J, Jarrett, T, Anderbach, H, Anderson, A, Bunton, J, Chow, K, Collier, J D, Driver, S, Filipovic, M D, Gurkan, G, Hopkins, A M, Kapinska, A D, Leahy, D A, Marvil, J, Manojlovic, P, Norris, R P, Phillips, C, Robotham, A, Rudnick, L, Singh, V, White, S V

Repurposing a polymer precursor: Synthesis and in vitro medicinal potential of ferrocenyl 1, 3-benzoxazine derivatives

- Mbaba, Mziyanda, Dingle, Laura M K, Cash, Devon, de la Mare, Jo-Anne, Laming, Dustin, Taylor, Dale, Hoppe, Heinrich C, Edkins, Adrienne L, Khanye, Setshaba D

  • Authors: Mbaba, Mziyanda , Dingle, Laura M K , Cash, Devon , de la Mare, Jo-Anne , Laming, Dustin , Taylor, Dale , Hoppe, Heinrich C , Edkins, Adrienne L , Khanye, Setshaba D
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/165395 , vital:41240 , https://doi.org/10.1016/j.ejmech.2019.111924
  • Description: Cancer and malaria remain relevant pathologies in modern medicinal chemistry endeavours. This is compounded by the threat of development of resistance to existing clinical drugs in use as first-line option for treatment of these diseases. To counter this threat, strategies such as drug repurposing and hybridization are constantly adapted in contemporary drug discovery for the expansion of the drug arsenal and generation of novel chemotypes with potential to avert or delay resistance. In the present study, a polymer precursor scaffold, 1,3-benzoxazine, has been repurposed by incorporation of an organometallic ferrocene unit to produce a novel class of compounds showing in vitro biological activity against breast cancer, malaria and trypanosomiasis.
  • Full Text:
  • Date Issued: 2020

Sistering and sexual socialisation: a discursive study of Xhosa women’s sisterly interactions concerning sex and reproduction

- Ndabula, Yanela, Macleod, Catriona I, Young, Lisa S

  • Authors: Ndabula, Yanela , Macleod, Catriona I , Young, Lisa S
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/160301 , vital:40432 , DOI: 10.1080/13691058.2020.1785551
  • Description: Considerable research has been devoted to understanding and promoting parent-child sexual socialisation. Less attention has been paid to experiences of sibling interactions concerning sex. Drawing on discursive psychology, this study explores how women report interacting about sex and reproduction in their sisterly relationships. Ten in-depth interviews were conducted, using Free Association Narrative Interview technique, with five Black isiXhosa-speaking, middle-aged and working class women in South Africa.
  • Full Text:
  • Date Issued: 2020

SoTL: A mechanism for understanding and finding solutions to teaching and learning challenges

- Vorster, Jo-Anne E

  • Authors: Vorster, Jo-Anne E
  • Date: 2020
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/445727 , vital:74419 , https://doi.org/10.36615/sotls.v4i2.149
  • Description: The paper argues that the Scholarship of Teaching and Learning (SoTL) is a necessary strategy for mitigating the many teaching and learning challenges in South African higher education that prevent a large proportion of students from achieving academic success. Research suggests that well-structured and coordinated educational practices that are valued and supported by institutions are crucial for student success. While there exists a very useful body of scholarship on teaching and learning in higher education in South Africa, the persistently high levels of student failure and dropout across the system points to the need for more research into teaching and learning dilemmas in diverse institutional, disciplinary and classroom contexts. I argue that if more academics are to conduct SoTL, it has to be valued and supported by institutions and academic leaders. Even though more SoTL is needed to contribute to solving the many pedagogic dilemmas South African academics encounter, it is counter-productive to expect all academics to conduct SoTL. Rigorous SoTL requires immersion in educational ideas, concepts, theories and research processes. Many academics may not have the time or inclination to work in the area of SoTL, but I suggest that all must be scholarly teachers of their disciplines.
  • Full Text: false
  • Date Issued: 2020

Synthesis, structure and in vitro anti-trypanosomal activity of non-toxic Arylpyrrole-Based Chalcone derivatives:

- Zulu, Ayanda I, Oderinlo, Ogunyemi O, Kruger, Cuan, Isaacs, Michelle, Hoppe, Heinrich C, Smith, Vincent J, Veale, Clinton G L, Khanye, Setshaba D

  • Authors: Zulu, Ayanda I , Oderinlo, Ogunyemi O , Kruger, Cuan , Isaacs, Michelle , Hoppe, Heinrich C , Smith, Vincent J , Veale, Clinton G L , Khanye, Setshaba D
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/179017 , vital:40096 , https://doi.org/10.3390/molecules25071668
  • Description: With an intention of identifying chalcone derivatives exhibiting anti-protozoal activity, a cohort of relatively unexplored arylpyrrole-based chalcone derivatives were synthesized in moderate to good yields. The resultant compounds were evaluated in vitro for their potential activity against a cultured Trypanosoma brucei brucei 427 strain. Several compounds displayed mostly modest in vitro anti-trypanosomal activity with compounds 10e and 10h emerging as active candidates with IC50 values of 4.09 and 5.11 µM, respectively. More importantly, a concomitant assessment of their activity against a human cervix adenocarcinoma (HeLa) cell line revealed that these compounds are non-toxic.
  • Full Text:
  • Date Issued: 2020

Transnational Crime in Deon Meyer’s Devil’s Peak and Santiago Gamboa’s Night Prayers:

- Naidu, Samantha

  • Authors: Naidu, Samantha
  • Date: 2020
  • Language: English
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/163881 , vital:41077 , ISBN 9783030534134 , https://0-doi.org.wam.seals.ac.za/10.1007/978-3-030-53413-4_2
  • Description: Naidu argues that transnational crime wreaks havoc on global, national and personal levels in the postcolonial crime novels Devil’s Peak (2007) by South African author Deon Meyer and Night Prayers (2016) by Colombian author Santiago Gamboa. As postcolonial crime novels, they critique sociopolitical instability and corruption harking back to colonial times. Using mobility studies, Naidu interrogates the novels’ rendering of complex relations between the local and the global, and the past and the present. Despite stylistic and generic differences, both novels engage with the pervasive, transnational nature of criminal syndicates and current crimes which are a result of turbulent and unjust histories. Naidu examines the mobility of hapless victims, postcolonial anti-detectives and subversive heroines and comments on the ironic hope afforded by such figures.
  • Full Text:
  • Date Issued: 2020

Two new Caenis Species (Insecta: Ephemeroptera: Caenidae) from the Kruger National Park, South Africa:

- Malzacher, P, Barber-James, Helen M

  • Authors: Malzacher, P , Barber-James, Helen M
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/150256 , vital:38954 , https://0-doi.org.wam.seals.ac.za/10.4001/003.028.0062
  • Description: The new mayfly species Caenis albicans sp. n. and Caenis letabanensis sp. n. (Ephemeroptera: Caenidae) from the Kruger National Park, South Africa, are described herein. The new species were collected in the area of the confluence of the Olifants and Letaba Rivers. They belong to the Caenis – TPA group, a group widely distributed in Africa, characterised inter alia by forceps apically having a tuft of long spines. The material examined also contained samples from the Crocodile and Sabie Rivers, with larvae and imagines of Caenis brevipes Kimmins, 1956. The previously unknown larva of this species is also described.
  • Full Text:
  • Date Issued: 2020

‘That ever-blurry line between us and the criminals’: African Noir and the Ambiguity of Justice in MŨkoma wa NgŨgĨ’s Black Star Nairobi and Leye Adenle’s When Trouble Sleeps

- Naidu, Samantha

  • Authors: Naidu, Samantha
  • Date: 2020
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/158069 , vital:40145 , https://0-doi.org.wam.seals.ac.za/10.1093/fmls/cqaa020
  • Description: This article, which focuses on African noir as a variety of neo-noir literature, begins by outlining the intertextual and intercultural relationships between classic noir and African noir. Thereafter, the postcolonial, postmodernist and transnational elements of African noir are described utilizing Mũkoma wa Ngũgĩ’s novel Black Star Nairobi (2013) and Leye Adenle’s When Trouble Sleeps (2018) as exemplars. Arguing that African noir draws on various genres and discourses, the article demonstrates how issues of socio-political justice, ontological and existential dilemmas, aesthetic concerns and the epistemological quest are rendered as ambiguous and murky. Based on a close reading of Black Star Nairobi and When Trouble Sleeps, the article concludes that the predominant chiaroscuro effect of African noir is not so much a ‘dark’ sensibility as one of abstruseness and poignant Afro-pessimism.
  • Full Text:
  • Date Issued: 2020

A continental-scale validation of ecosystem service models

- Willcock, Simon, Hooftman, Danny A P, Balbi, Stefano, Blanchard, Ryan, Dawson, Terence P, O’Farrell, Patrick J, Hickler, Thomas, Hudson, Malcolm D, Lindeskog, Mats, Martinez-Lopez, Javier, Mulligan, Mark, Reyers, Belinda, Shackleton, Charlie M, Sitas, Nadia, Villa, Ferdinando, Watts, Sophie M, Eigenbrod, Felix, Bullock, James M

An evaluation of the current extent and potential spread of Black Bass invasions in South Africa

- Khosa, Dumisani, Marr, Sean M, Wasserman, Ryan J, Zengeya, Tsungai A, Weyl, Olaf L F

  • Authors: Khosa, Dumisani , Marr, Sean M , Wasserman, Ryan J , Zengeya, Tsungai A , Weyl, Olaf L F
  • Date: 2019
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/103867 , vital:32317 , https://doi.org/10.1007/s10530-019-01930-0
  • Description: Black Bass, a collective name for members of the centrarchid genus Micropterus, are native to North America, but have been introduced globally to enhance recreational angling. This study assessed the distribution of Micropterus salmoides, M. dolomieu and M. punctulatus in South Africa using both formal (survey-based) and informal (tournament data and social media) information sources. Analysis of the distribution data showed habitat bias between the data sources. Survey data from formal information sources were dominated by locality records in riverine environments while those derived from informal information sources focused more on lacustrine habitats. Presence data were used to develop niche models to identify suitable areas for their establishment. The predicted distribution range of M. salmoides revealed a broad suitability over most of South Africa, however, the Cape Fold Ecoregion and all coastal regions were most suitable for the establishment for both M. dolomieu and M. punctulatus. Flow accumulation and precipitation of coldest quarter were the most important environmental variables associated with the presence of all Black Bass species in South Africa. In addition, anthropogenic disturbance such as agricultural activities were associated with the presence of both Smallmouth Bass and Spotted Bass. An extensive area-based invasion debt was observed for all Micropterus spp. The potential for further spread of Black Bass in South Africa is of ecological concern because of their impact on native biota.
  • Full Text:
  • Date Issued: 2019

Applying distributed ledger technology to digital evidence integrity

- Weilbach, William T, Motara, Yusuf, M

  • Authors: Weilbach, William T , Motara, Yusuf, M
  • Date: 2019
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/428960 , vital:72549 , https://ieeexplore.ieee.org/abstract/document/8732798
  • Description: This paper examines the way in which blockchain technology can be used to improve the verification of integrity of evidence in digital forensics. Some background into digital forensic practices and blockchain technology are discussed to provide necessary context. A particular scalable method of verifying point-in-time existence of a piece of digital evidence, using the OpenTimestamps (OTS) service, is described, and tests are carried out to independently validate the claims made by the service. The results demonstrate that the OTS service is highly reliable with a zero false positive and false negative error rate for timestamp attestations, but that it is not suitable for timesensitive timestamping due to the variance of the accuracy of timestamps induced by block confirmation times in the Bitcoin blockchain.
  • Full Text:
  • Date Issued: 2019

Green skills research in South Africa

- Rosenberg, Eureta, Ramsarup, Preesha, Lotz-Sisitka, Heila

  • Authors: Rosenberg, Eureta , Ramsarup, Preesha , Lotz-Sisitka, Heila
  • Date: 2019
  • Subjects: To be catalogued
  • Language: English
  • Type: text , book chapter
  • Identifier: http://hdl.handle.net/10962/436040 , vital:73222 , ISBN 9780429279362 , https://www.taylorfrancis.com/chapters/edit/10.4324/9780429279362-13/synthesis-elaboration-critical-realist-methodology-green-skills-research-eureta-rosenberg
  • Description: This book brings the diverse contributions offered in the different sections of this book together into a pathway for new policy development research, new forms of critical skills research and ongoing engagement with education and training system development. The chapter first provides a meta-reflection on the different types of green skills research that are needed to, in combination, make a stronger impact on the national system of skills research and planning. Secondly, the chapter makes a strong argument for aligning green skills research to the Sustainable Development Goals, and their critical and contextual articulation at national level, with emphasis on working with the cross-cutting Sustainable Development Goal (SDG) 4, Target 4.7 that motivates for governments to include a focus on education and sustainable development across the lifelong learning system in order to enable and support learning and skills for enabling the other SDGs to be realised in practice. Lastly, the chapter considers the shift in the way that work is considered when political economy meets political ecology, and we argue that work transforms towards not only a productive focus, or a social focus, but also an ontologically grounded regenerative focus, much needed at the start of the twenty-first century.
  • Full Text:
  • Date Issued: 2019

Green skills research: Implications for systems, policy, work and learning

- Lotz-Sisitka, Heila, Ramsarup, Presha

  • Authors: Lotz-Sisitka, Heila , Ramsarup, Presha
  • Date: 2019
  • Subjects: To be catalogued
  • Language: English
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/392875 , vital:68808 , ISBN 9780429279362 , https://doi.org/10.4324/9780429279362
  • Description: This chapter brings the diverse contributions offered in the different sections of this book together into a pathway for new policy development research, new forms of critical skills research and ongoing engagement with education and training system development. The chapter first provides a meta-reflection on the different types of green skills research that are needed to, in combination, make a stronger impact on the national system of skills research and planning. Secondly, the chapter makes a strong argument for aligning green skills research to the Sustainable Development Goals, and their critical and contextual articulation at national level, with emphasis on working with the cross-cutting Sustainable Development Goal (SDG) 4, Target 4.7 that motivates for governments to include a focus on education and sustainable development across the lifelong learning system in order to enable and support learning and skills for enabling the other SDGs to be realised in practice. Lastly, the chapter considers the shift in the way that work is considered when political economy meets political ecology, and we argue that work transforms towards not only a productive focus, or a social focus, but also an ontologically grounded regenerative focus, much needed at the start of the twenty-first century.
  • Full Text:
  • Date Issued: 2019

Synthesis and elaboration of critical realist methodology for green skills research

- Rosenberg, Eureta

  • Authors: Rosenberg, Eureta
  • Date: 2019
  • Subjects: To be catalogued
  • Language: English
  • Type: text , book chapter
  • Identifier: http://hdl.handle.net/10962/436119 , vital:73228 , ISBN 9780429279362 , https://www.taylorfrancis.com/chapters/edit/10.4324/9780429279362-13/synthesis-elaboration-critical-realist-methodology-green-skills-research-eureta-rosenberg
  • Description: In the concluding section of the book, this penultimate chapter elaborates on the central quest for research design that approaches green skills questions as inextricably linked to complex economic, environmental and social justice contexts that are systemic and emergent in nature, therefore necessitating a depth ontology and a dialectic approach, given the transformative intent of researching towards a more just and sustainable society. The chapter highlights methodological insights from the studies reviewed in this book, and provides guidance for green skills research design. It does so in relation to four interacting domains that research and programme planners need to consider in relation to each other. These are: the political-institutional context; theory and conceptual considerations; researchers’ personal-professional commitments; and the aligned methodological considerations. The meta-theory underlabouring the work in this book is Bhaskar’s dialectical critical realism, and its practical implications are illustrated and elaborated here with reference to the most pertinent features including lamination, systems, emergence, absence and associated approaches to analysis. The result is not a blueprint for a single research design, but considerations that could give rise to a variety of different designs for green skills research.
  • Full Text:
  • Date Issued: 2019

Transitioning into work

- Rosenberg, Eureta

  • Authors: Rosenberg, Eureta
  • Date: 2019
  • Subjects: To be catalogued
  • Language: English
  • Type: text , book chapter
  • Identifier: http://hdl.handle.net/10962/436132 , vital:73229 , ISBN 9780429279362 , https://www.taylorfrancis.com/chapters/edit/10.4324/9780429279362-13/synthesis-elaboration-critical-realist-methodology-green-skills-research-eureta-rosenberg
  • Description: Due to the relative newness and contemporary emergence of environmental concerns and sustainable development challenges, policies and forms of work, little is known about the transitioning patterns from education to work. As environmental occupations are found in multiple sectors, and at multiple levels, it is necessary to understand how diversity of disciplinary foundation, historical factors and the nature of the field-based occupation as it is emerging influence transitions into work, especially for highly specialised occupations that are in high demand, such as wildlife vets or wetland ecologists, and in critical occupations that shape sustainable development for whole communities, such as sustainable development employees in municipalities. This chapter utilises a complex notion of learning pathways as neither completely individualistic nor wholly structurally determined, and positions our interest in transitions research within a framing of critical vocationalism that seeks to address not only individual experiences of transitioning, or individual agentive factors, but also structural dynamics and structural processes that can help to ‘ease’ the transitioning process in these critical areas of green skills development.
  • Full Text:
  • Date Issued: 2019

Transitioning into work: A learning and work transitioning process perspective

- Ramsarup, Presha, Lotz-Sisitka, Heila

  • Authors: Ramsarup, Presha , Lotz-Sisitka, Heila
  • Date: 2019
  • Subjects: To be catalogued
  • Language: English
  • Type: text , book
  • Identifier: http://hdl.handle.net/10962/392944 , vital:68814 , ISBN 9780429279362 , https://doi.org/10.4324/9780429279362
  • Description: Due to the relative newness and contemporary emergence of environmental concerns and sustainable development challenges, policies and forms of work, little is known about the transitioning patterns from education to work. As environmental occupations are found in multiple sectors, and at multiple levels, it is necessary to understand how diversity of disciplinary foundation, historical factors and the nature of the field-based occupation as it is emerging influence transitions into work, especially for highly specialised occupations that are in high demand, such as wildlife vets or wetland ecologists, and in critical occupations that shape sustainable development for whole communities, such as sustainable development employees in municipalities. This chapter utilises a complex notion of learning pathways as neither completely individualistic nor wholly structurally determined, and positions our interest in transitions research within a framing of critical vocationalism that seeks to address not only individual experiences of transitioning, or individual agentive factors, but also structural dynamics and structural processes that can help to ‘ease’ the transitioning process in these critical areas of green skills development.
  • Full Text:
  • Date Issued: 2019

A challenge to conventional wisdom: locating agency in Angola’s and Ghana’s economic engagements with China

- Chipaike, Ronald, Bischoff, Paul, 1954-

  • Authors: Chipaike, Ronald , Bischoff, Paul, 1954-
  • Date: 2018
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/161537 , vital:40636 , https://0-doi.org.wam.seals.ac.za/10.1177/00219096187639223
  • Description: This article makes the point that African states with significant strategic resources and democratic governance systems bargain better in economic and development assistance engagements with China and other partners. In democratic African states, non-state actors play critical complementary roles to the state, leading to multi-faceted forms of African agency. For non-democratic states, a significant limiting factor in their agency is the lack of working relationships between the state and non-state actors. Concomitantly, such states find themselves with weak bargaining and negotiating capacities. If African agency is to be assertive, then state and non-state actors should work together when engaging external partners.
  • Full Text:
  • Date Issued: 2018

Contesting the nature of young pregnant and mothering women: Critical healthcare nexus research, ethics committees, and healthcare institutions

- Feltham-King, Tracey, Bomela, Yolisa, Macleod, Catriona I

  • Authors: Feltham-King, Tracey , Bomela, Yolisa , Macleod, Catriona I
  • Date: 2018
  • Subjects: To be catalogued
  • Language: English
  • Type: text , book chapter
  • Identifier: http://hdl.handle.net/10962/434199 , vital:73038 , ISBN 978-3-319-74720-0 , https://link.springer.com/chapter/10.1007/978-3-319-74721-7_5
  • Description: In this chapter we describe how systemic contradictions complicate ethical site entry and data collection in critical research. We present our ethnographic research within South African antenatal and postnatal clinics as an example. Pregnant and mothering young women are subject to diverging views of minors in different state-produced policies and legislation. In addition, we encountered discrepancies between our research aims and assumptions made by the University Ethical Standards Committee, managers, healthcare providers, teenaged participants, and other service users. These complexities have implications for ethical engagement of researchers and call for nuanced means of data collection and analysis. We discuss how critical researchers can mitigate social injustice by questioning entrenched ways of thinking about participants and negotiating the contradictory positionings of self and others.
  • Full Text:
  • Date Issued: 2018

Control options for false codling moth, Thaumatotibia leucotreta (Lepidoptera: Tortricidae), in South Africa, with emphasis on the potential use of entomopathogenic nematodes and fungi

- Malan, Antoinette P, von Diest, J I, Moore, Sean D, Addison, Pia

  • Authors: Malan, Antoinette P , von Diest, J I , Moore, Sean D , Addison, Pia
  • Date: 2018
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/452219 , vital:75112 , https://hdl.handle.net/10520/EJC-de823b051
  • Description: False codling moth (FCM), Thaumatotibia leucotreta (Lepidoptera: Tortricidae) is an important pest of various fruit crops in South Africa. Current FCM control strategies include the use of chemical insecticides. However, FCM has developed resistance to some of the insecticides, and stringent chemical residue restrictions have been imposed by some foreign markets. Thus, the demand for high-quality fruit has translated into a need for new, efficient and effective integrated pest management (IPM) strategies. One such strategy is the control of the soil-dwelling life stages of FCM, using entomopathogenic nematodes (EPNs) and entomopathogenic fungi (EPF). Both of the biocontrol agents concerned have individually been shown to be effective against FCM.
  • Full Text:
  • Date Issued: 2018
  • Disclaimer
  • Privacy
  • Copyright
  • Contact