https://journals.satnt.aosis.co.za/index.php/satnt/issue/feedSuid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie2018-01-12T16:48:08+01:00AOSIS Publishingwebmaster@journals.satnt.aosis.co.zaOpen Journal Systems<a id="readmorebanner" title="http://www.satnt.ac.za" href="http://www.satnt.ac.za" target="_blank">Visit the journal</a> <img style="padding-top: 2px;" src="/public/web_banner.svg" alt="" />https://journals.satnt.aosis.co.za/index.php/satnt/article/view/1375Practical lessons in natural science: A case study2017-12-21T17:02:13+01:00Sydney Mothokwasydmoneytho@gmail.comEstelle Gaigherestelle.gaigher@up.ac.zaElize Randall†estelle.gaigher@up.ac.zaMelanie Moenestelle.gaigher@up.ac.za<p>This article reports a case study that contributes to the literature on the development of 21st century skills in science classrooms in South Africa. The study explores the manner in which four experienced natural science teachers integrate practical lessons into their Grade 7 classes in the Limpopo province. The study is based on a theory of curriculum implementation for science education in developing countries. Data was collected through document analysis, lesson observations and semistructured interviews. The results are discussed in terms of the preparation, enactment and assessment of practical lessons. The study revealed that these teachers presented practical tasks in a traditional manner, rather than using 21st century approaches. Typically, lesson preparation lacked essential detail, while learners were passive observers, and assessment focused on knowledge rather than skills. Additionally, inadequate time allocation for the teaching of natural science, coupled with a lack of appropriate resources, were identified as areas of concern. The insight gained in this study should be used to improve curriculum implementation and to guide teachers regarding practical lesson integration in their classrooms.</p><p> </p>2017-01-31T15:42:29+01:00Copyright (c) 2017 Sydney Mothokwa, Estelle Gaigher, Elize Randall†, Melanie Moenhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1388The changing role of continuity and discontinuity in the history of philosophy and mathematics2017-12-21T17:02:13+01:00Danie F.M. Straussdfms@cknet.co.za<p><span>The aim of this article is to highlight the inevitability of employing discreteness and continuity as primitive (indefinable) modes of explanation in the history of philosophy and mathematics. It embodies the general challenge to account for the coherence of what is unique. Gödel emphasises the coherence of ‘primitive concepts’. Greek philosophy already discovered the spatial whole and/or parts relation with its infinite divisibility. During and after the medieval era philosophers toggled between an atomistic appreciation of the continuum and its opposite, for example found in the thought of Leibniz who postulated his law of continuity (</span><em>lex continui</em><span>). The discovery of incommensurability (irrational numbers) by the Greeks caused the first foundational crisis of mathematics, as well as its geometrisation. Leibniz and Newton did not resolve the problems surrounding the limit concept and soon it induced the third foundational crisis of mathematics. It caused Frege and the ‘continuum theoreticians’ to assign priority to the continuum – discreteness is a catastrophe. Recently Smooth Infinitesimal Analysis appreciated what is ‘continuous’ as constituting ‘an unbroken or uninterrupted whole’. Intuitionistic mathematics once more proceeded from an emphasis on the whole and/or parts relation. In spite of alternating attempts to understand continuity exclusively, either in arithmetical or in spatial terms, the history of philosophy and mathematics undeniably confirms that the co-conditioning role of these two modes of explanation remains a constant element in reflections on continuity and discontinuity. (The role of continuity and discontinuity within the disciplines of physics and biology will be discussed in a separate article.)</span></p>2017-01-31T15:42:41+01:00Copyright (c) 2017 Danie F.M. Strausshttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1365Challenges of managing an information communication network in rural schools2017-12-21T17:02:13+01:00Maryke A. Mihaimaryke.mihai@up.ac.za<span>The purpose of this study was to describe the management challenges and the type of management approach that developed during the implementation of an ICT network between six schools, transmitting Maths and Science lessons for grade 12 learners. In April 2008 an interactive whiteboard (IWB) network was established in a Mpumalanga town, with one of the province’s foremost schools being partnered with five disadvantaged schools. A qualitative descriptive study was undertaken. I described the reality through the eyes of the participants and the context of the study from the perspective of the researchers. The project is a case study that investigates a small geographical area with a small number of individuals chosen. I undertook a content analysis of my semistructured interviews, documents and field notes. The data was divided in different codes and families in Atlas.ti and the patterns described. Findings indicate a difference between the management challenges of the rural schools and the leading school. A systems approach was followed. A balanced matrix management model developed in the leading school, but in the rural schools teachers still reported hierarchically to their HODs and principals. They also reported horizontally to the project manager, administrative officer and HODs of the leading school in their subject groups. This study contributes to current management theory, by means of the description of the matrix model developed in the leading school, the discussion of the management procedures in the rural schools, as well as the special roles played by the participants.</span>2017-02-23T16:35:08+01:00Copyright (c) 2017 Maryke A. Mihaihttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1438Continuity and discontinuity in physics and biology2017-12-21T17:02:13+01:00Danie F.M. Straussdfms@cknet.co.za<span>Although classical physicists believed that nature does not make leaps – it is continuous and infinitely divisible – 20th century physicists soon realised that there are indivisible elementary particles (quanta) and that physical space is therefore not continuous and also not infinitely divisible. This state of affairs is also underscored by the duality of particle and wave. Even for Einstein the continuity of the microstructure of ‘space-time’ was still an open question. Therefore considering physical phenomena as literally continuous could be questioned. Moreover it is striking that reflection on the nature of matter gave birth both to an ‘atomistic’ and a ‘continuity’ conception. Faithful to modern nominalism (neo-)Darwinism accepts no universality outside the human mind. Plants and animals are simply positioned in a continuum with the aid of arbitrary names. This continuity postulate – known as ‘gradualism’ – is, nonetheless, confronted from the outset with the dominant stasis pattern of the paleontological record: a type appears abruptly, remains constant for millions of years and then disappears equally abruptly. As a consequence the assumed ‘imperfection’ of the fossil record could be questioned. Prominent biological thinkers still wrestle with the problem of continuity and discontinuity. One of them explains that these stories begin from the same foundational fallacy and then proceed in an identically erroneous way. They start with the most dangerous of mental traps: a hidden assumption, depicted as self-evident, if recognised at all, namely, a basic definition of evolution as continuous flux.</span>2017-07-24T14:21:24+02:00Copyright (c) 2017 Danie F.M. Strausshttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1398A cultural-historical activity theory focus on the holders of indigenous knowledge as self-directed learners: Lessons for education in South African schools2017-12-21T17:02:13+01:00Josef J. de Beerjosef.debeer@nwu.ac.zaElsa MentzElsa.mentz@nwu.ac.za<span>This article demonstrates by means of four examples how the holders of indigenous knowledge were and are self-directed learners. They take the initiative to diagnose their learning needs and learning goals, identify resources for learning, choose appropriate learning strategies, and evaluate the outcomes. The construct of the ethnobotanical knowledge index is used to show how people in the Northern Cape in South Africa become self-directed learners to survive. By using third-generation cultural-historical activity theory, we show the lessons this holds for the classroom, which often is characterised by teacher-centred transmission mode teaching and learning, with very little self-directed learning.</span>2017-02-23T16:35:10+01:00Copyright (c) 2017 Josef J. de Beer, Elsa Mentzhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1381The adenosine A<sub>1</sub> and A<sub>2A</sub> receptor affinity of a series of 3,4-dihydropyrimidone derivatives2017-12-21T17:02:13+01:00Runako M. Katsidzira21252998@nwu.ac.zaMietha M. van der Walt13035134@nwu.ac.zaJacobus J. BerghKobus.Bergh@nwu.ac.zaGisella Terre’Blanche10206280@nwu.ac.zaParkinson’s disease is a complex neurodegenerative condition with current treatment only focussed on symptomatic therapy that does not slow or stop the progression of the disease. Since the discovery that adenosine A<sub>1</sub> and A<sub>2A</sub> receptors are potential drug targets for the therapy of Parkinson’s disease, various research groups have attempted to identify adenosine antagonists. So the possibility exists that the administration of an adenosine A<sub>2A</sub> receptor antagonist may prevent further neurodegeneration. Furthermore, the antagonism of adenosine A<sub>1</sub> receptors has the potential of treating Parkinson’s disease-associated cognitive deficits. Therefore, dual antagonism of adenosine A<sub>1</sub> and A<sub>2A</sub> receptors would be of great benefit since this would potentially treat both the motor as well as the cognitive impairment associated with Parkinson’s disease. Based on the observation that a series of 1,4-dihydropyridine derivatives possess adenosine A<sub>1</sub> and A<sub>2A</sub> receptor affinity, the current study investigated the potential of the structurally related 3,4-dihydropyrimidone analogues as adenosine A<sub>1</sub> and A<sub>2A</sub> receptor antagonists. Overall, the 3,4-dihyropyrimidone analogues were found to possess weak affinity for the adenosine A<sub>2A</sub> receptor, but more promising adenosine A<sub>1</sub> receptor affinity was found, ranging in the low micromolar range. Among the investigated compounds, the <em>p</em>-bromophenyl substituted dihydropyrimidone (6b) possesses the best adenosine A<sub>1</sub> receptor affinity with a <em>K</em><sub>i</sub> value of 7.39 µM. In conclusion, this 3,4-dihydropyrimidone derivative can be used as a lead for the design of novel adenosine A<sub>1</sub> receptor antagonists, although further structural modifications are required to enhance the adenosine A<sub>2A</sub> receptor affinity before a clinically viable candidate will be available as potential treatment of Parkinson’s disease.2017-02-28T09:32:27+01:00Copyright (c) 2017 Runako M. Katsidzira, Mietha M. van der Walt, Jacobus J. Bergh, Gisella Terre’Blanchehttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1426The effectiveness of an English nutrition education game on knowledge retention in Grade 5 isiZulu-speaking learners2017-12-21T17:02:13+01:00Nicola L. Wileswilesn@ukzn.ac.zaRebecca A. Estevesresteves.dietician@gmail.comAnnette van Onselenvanonselen@ukzn.ac.za<span> A good understanding of nutrition concepts enables a person to convert basic knowledge into the ability to take action. At the time of this study a game testing nutrition education concepts in English among isiZulu speaking learners had not been investigated. The objective of the study was to determine the effectiveness of an English Food-Based Dietary Guideline (FBDG) nutrition education game on the retention of nutrition knowledge among isiZulu speaking learners. An intervention using a pre-test post-test design. A five part questionnaire was administered to determine levels of nutrition knowledge before and six weeks after a nutrition education board game intervention. A total of 169 Grade 5 learners from two schools in Sweetwaters, KwaZulu-Natal, participated in this study. Baseline results showed that the learners had very poor knowledge of the basic FBDG. The question regarding the food fortification logo showed most improvement overall, with statistical significance ( </span><em>p</em><span> = 0.000). The pictorial representation of information in the game helped the learners improve their knowledge retention for certain questions. While there was very little improvement in the retention of knowledge as a whole, the control group experienced a significant increase in their post-test knowledge score (</span><em>p</em><span> = 0.011). Poor English proficiency may have influenced the effectiveness of the intervention. Nutrition education games have the potential to improve nutrition knowledge. Priority should be given to increasing English language proficiency among isiZulu speaking learners to improve their ability to retain nutrition information taught at school.</span><br />2017-04-21T14:16:10+02:00Copyright (c) 2017 Nicola L. Wiles, Rebecca A. Esteves, Annette van Onselenhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1427The use of inquiry-based science teaching to promote students’ conceptual understanding of direct current electricity2017-12-21T17:02:13+01:00Nazeem Edwardsnedwards@sun.ac.zaLesley le Grangellg@sun.ac.zaResearch in science education evolved from the positivist paradigm in which scientific knowledge was considered to be immutable. This article investigates the use of inquiry-based science teaching as a pedagogical strategy to develop prospective science teachers’ conceptual understanding of direct current electricity. It is proposed that Vygotsky’s social constructivism and Dewey’s pragmatism have common elements that may serve as a philosophical framework for inquiry-based science teaching. An example of the transformative conjecture-driven teaching experiment as a design study in science education, is outlined. A retrospective analysis is provided to develop a learning environment that can contribute to better conceptual understanding of basic direct current electricity by prospective science teachers.2017-05-26T13:54:37+02:00Copyright (c) 2017 Nazeem Edwards, Lesley le Grangehttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1431Van laboratoriumbank tot siekbed: Genetiese bevindings in skisofrenie2017-12-21T17:02:13+01:00Johannes L. Rooserna.fourie@up.ac.za<p>Die komplekse genetiese argitektuur van skisofrenie word kortliks omskryf deur na twee kontrasterende (maar konseptueel verbandhoudende) hipoteses te verwys. Bevindings van die lokus van genoomwye assosiasiestudies (GWAS) en die major-histoversoenbaarheidskompleks (MHK) op chromosoom 6 en skisofrenie word aangehaal. Klassieke aanvullingskaskade verbonde hieraan word betrek in die eliminering, of ‘snoei van sinapse’ as deel van die patogenese van skisofrenie. Daar word nader aan die siekbed van skisofreniepasiënte beweeg deur te kyk na die volgende navorsingsbevindings in pasiënte met skisofrenie in die Afrikanerbevolking:</p><ul><li>mikro-uitwissing by die 22q11.2 chromosoom as ’n spesifieke tipe skisofrenie;</li><li>fenotipiese kenmerke van skisofreniepasiënte wat spontane geenmutasies dra;</li><li>skisofrenie wat verwant is aan die vaderlike ouderdom (VOVS) en sosiale funksionering vroeg en later in die lewe van die pasiënte;</li><li>verhoogde selfdoodrisiko in skisofreniepasiënte met koppeling aan chromosoom 13q en hoe mortaliteit in die pasiënte verlaag kan word.</li></ul>2017-09-29T16:25:54+02:00Copyright (c) 2017 Johannes L. Rooshttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1482Operational and tegnological requirements for the profitable provision of rail freight transport2017-12-21T17:02:13+01:00Wessel J. Pienaarwpienaar@sun.ac.za<span>This article provides an overview of the most pertinent operational and design requirements of rail freight transport technology that could be instrumental in the profitable participation of rail transport in an economically deregulated freight transport market. The following three aspects are addressed: (1) The market segments that are serviced profitably by rail transport in industrial countries; (2) comparative cost of rail transport and the specific operational methods employed to make rail transport more cost advantageous; and (3) the most pertinent technological requirements set upon rail transport systems to operate commercially viably. Regarding technological requirements, the following aspects are elaborated upon: (1) train types and purpose-built wagons to appropriately serve specific market segments; (2) the type of freight terminals employed to effectively support rail transport operations; and (3) the types of handling equipment needed to enable rail transport to operate smoothly. The purpose-built wagon models and the types of train compositions to optimally adhere to rail transport operators’ specific needs, as well as the the most important factors that underlie wagon design, are discussed. Subsequently the functional requirements of the main terminal facilties that receive freight trains are discussed. Lastly, the handling equipment needed to load, unload and transload transportable freight on, from and between wagons and other modes of transport swiftly, safely and at lowest cost per freight unit are discussed.</span>2017-11-17T14:33:45+01:00Copyright (c) 2017 Wessel J. Pienaarhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1442Development of an explanatory framework for the solution of electricity problems2017-12-21T17:02:13+01:00Reuben D. Koontserdkoontse@gmail.comJeanne Kriekkriekj@unisa.ac.za<span>Problem solving is considered a higher order thinking skill and is included as one of the 21st century’s core competencies. To demonstrate how students’ use of a specific mathematical approach leads to a particular type of understanding when solving problems in electricity, an interpretive framework was developed. This interpretive framework combined two extensively used frameworks, namely Mathematical Resources (MR) and Extended Semantic Model (ESM) and was rationalised in electricity subtopics namely electric circuit, electric force and electric field. An interpretivist research paradigm was chosen to explain and derive meaning from fifteen first year physics students’ mathematical approaches in solving electricity problems. In general, students were found to be more inclined to activate formal mathematical rules, even when the use of basic or everyday mathematics that require activation of intuitive knowledge elements and reasoning primitives, would be more efficient. The need for a qualitative approach to solving physics problems rather than a quantitative one was presented and this has implications for future approaches to teaching science.</span>2017-11-29T09:59:03+01:00Copyright (c) 2017 Reuben D. Koontse, Jeanne Kriekhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1478Die leerteorieë onderliggend aan inligting en kommunikasietegnologie waarvan onderwysers kennis moet dra2017-12-21T17:02:13+01:00Shirley S. Mukharimukhass@unisa.ac.zaAnna J. Hugoannajohugo@gmail.comIn hierdie artikel word die data uit ’n navorsingsprojek oor die gebruik van inligting en kommunikasietegnologie (IKT) in skole bespreek. Gebaseer op die terugvoering wat van die respondente verkry is, is die navorsers van mening dat onderwysers vertroud moet wees met die leerteorieë onderliggend aan die gebruik van IKT in die klaskamer. Behaviourisme, konstruktivisme en konnektivisme as teorieë onderliggend aan IKT word bespreek. Daar word aangedui hoe kennis van hierdie drie leerteorieë saam met die gebruik van IKT tot voordeel van onderrig en leer in die klaskamer kan strek.2017-12-07T11:22:25+01:00Copyright (c) 2017 Shirley S. Mukhari, Anna J. Hugohttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1474Herbesin oor die opleiding van natuurwetenskaponderwysers in Suid-Afrika: Lesse uit Finland2017-12-21T17:02:13+01:00Josef de Beerjosef.debeer@nwu.ac.zaPiet Ankiewiczpieta@uj.ac.za<span>Finland word dikwels gesien as die ‘goudstandaard‘ in natuurwetenskaponderwys, danksy die land se uitmuntende prestasie in internasionale toetse soos die program vir internasionale studentassessering (PISA) en tendense in internasionale wiskunde- en natuurwetenskapstudie (TIMSS). Daarteenoor laat Suid-Afrika se prestasie in TIMSS veel te wense oor. Volgens die Wêreld-Ekonomiese Forum (WEF) se wêreldwye mededingendheidsverslag (2010–2011), is Suid-Afrika 137ste op die ranglys van 139 lande wat betref die gehalte van wiskunde- en natuurwetenskaponderwys. Die skrywers van hierdie artikel beskou die gehalte van natuurwetenskaponderwysers as die sleutel om hierdie probleem die hoof te bied. Ons dink na oor Finland as die ‘superoutoriteit’ in natuurwetenskaponderwys en oor lesse wat Suid-Afrika kan leer omtrent die verskaffing van beter voordiensopleiding vir studente wat hulle as natuurwetenskaponderwysers wil bekwaam. In hierdie artikel verbind ons ontluikende temas wat uit kwalitatiewe navorsingsdata na vore gekom het met aanbevelings oor hoe voordiensopleiding vir voornemende onderwysers verbeter kan word, gebaseer op die beste gebruike in Finland. Ons gebruik onderhoude met Finse onderwysers en onderwysdosente, skoolwaarneming in beide lande, artefakte soos die refleksies van Suid-Afrikaanse onderwysstudente oor hulle ondervindings in skole, en onderwysers se reaksies op die Sienings van die Aard van Natuurwetenskappe (</span><em>Views of the Nature of Science</em><span>)-vraelys. Die derdegenerasie–kultuurhistoriese aktiwiteitsteorie (KHAT) word gebruik as ’n navorsingslens om ‘spanning/onderstrominge’ in natuurwetenskaponderwys in Suid-Afrika te beklemtoon, en ons dui aan hoe hierdie aspekte by die opleiding van onderwysers verreken kan word.</span>2017-12-07T15:32:09+01:00Copyright (c) 2017 Josef de Beer, Piet Ankiewiczhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1484High rates of bacterial vaginosis and Chlamydia in a low-income, high-population-density community in Cape Town2018-01-08T12:23:16+01:00Katie S. Lennardkatieviljoen@gmail.comSmritee Dabeesmritee.dabee@gmail.comShaun L. Barnabasshaun.barnabas@uct.ac.zaEnock Havyarimanaehavyarimana@gmail.comShameem Z. Jaumdallyshameem.jaumdally@uct.ac.zaGerrit Bothagerrit.botha@uct.ac.zaNonhlanhla N. Mkhizenonom@nicd.ac.zaLinda-Gail Bekkerlinda-gail.bekker@uct.ac.zaGlenda Grayglenda.gray@mrc.ac.zaNicola Muldernicola.mulder@uct.ac.zaJo-Ann Passmorejoann.passmore@gmail.comHeather B. Jaspanhbjaspan@gmail.com<p>Young South African women, from resource-poor communities, face several sexual and reproductive health challenges. Here we describe the vaginal microbiota and sexually transmitted infection (STI) prevalence of 102; 16–22-year-old, HIV-negative South African women from a low-income, high-population-density community in Cape Town (CPT). Vaginal microbiota were profiled using 16S rRNA amplicon sequencing; bacterial vaginosis (BV) status was established using Nugent scoring and STIs were determined by multiplex polymerase chain reaction. STIs were common, with 55% of women having at least one STI; 41% were infected with high-risk human papilloma virus (HPV) and a further 28% with low-risk HPV; 44% were infected with Chlamydia, 16% of whom had at least one additional STI. Similarly, BV rates were very high, with 55% of women classified as BV-positive (Nugent score ≥7), 7% as BV-intermediate (Nugent score 3–6) and 38% as BV-negative (Nugent 0–2). Group B Streptococcus (Streptococcus agalactiae), the leading cause of neonatal sepsis, was present in 25% of BV-positive women and 28% of BV-negative women, and was significantly more abundant among BV-negative women. Both Chlamydia infection and BV may adversely affect reproductive health and place these women at additional risk for HIV acquisition. The high abundance of Prevotella amnii, in particular, may increase HIV risk, given its inflammatory capacity. Laboratory-based testing for STIs (Chlamydia and Gonorrhoeae in particular) appear to be warranted in this community, together with further monitoring or treatment of BV.</p><p><strong>Research correlation:</strong> This article is the original version, of which an Afrikaans translation was made available to provide access to a larger readership, available here: <a href="https://doi.org/10.4102/satnt.v36i1.1495">https://doi.org/10.4102/satnt.v36i1.1495</a></p>2017-12-12T15:59:03+01:00Copyright (c) 2017 Katie S. Lennard, Smritee Dabee, Shaun L. Barnabas, Enock Havyarimana, Shameem Z. Jaumdally, Gerrit Botha, Nonhlanhla N. Mkhize, Linda-Gail Bekker, Glenda Gray, Nicola Mulder, Jo-Ann Passmore, Heather B. Jaspanhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1495Hoë voorkomskoers van bakteriële vaginose en Chlamydia in ’n lae-inkomste, hoë-bevolkingsdigtheid gemeenskap in Kaapstad2018-01-08T12:23:16+01:00Katie S. Lennardkatieviljoen@gmail.comSmritee Dabeekatieviljoen@gmail.comShaun L. Barnabaskatieviljoen@gmail.comEnock Havyarimanakatieviljoen@gmail.comShameem Z. Jaumdallykatieviljoen@gmail.comGerrit Bothakatieviljoen@gmail.comNonhlanhla N. Mkhizekatieviljoen@gmail.comLinda-Gail Bekkerkatieviljoen@gmail.comGlenda Graykatieviljoen@gmail.comNicola Mulderkatieviljoen@gmail.comJo-Ann Passmorekatieviljoen@gmail.comHeather B. Jaspankatieviljoen@gmail.com<h4 class="sec1"><strong>Opsomming</strong></h4><p>Jong Suid-Afrikaanse vroue uit hulpbron-arm gemeenskappe staar verskeie uitdagings in die gesig in terme van hulle seksuele en reproduktiewe gesondheid. Hier beskryf ons die voorkoms van vaginale mikrobiota en seksueel oordraagbare infeksies (SOI’s) onder 102; 16–22-jarige MIV-negatiewe Suid-Afrikaanse vroue uit ’n lae-inkomste, hoë-bevolkingsdigtheid gemeenskap in Kaapstad. Vaginale mikrobiota is met behulp van 16S rRNA amplikon volgorde-bepaling geprofileer; bakteriese vaginose (BV) status is met behulp van ’n Nugent-telling vasgestel; en SOI’s is deur middel van ’n multipleks polimerase kettingreaksie bepaal. SOI’s was algemeen, met 55% van die vroue wat ten minste een SOI gehad het; 41% wat met hoë-risiko menslike papillomavirus (MPV) besmet was, en ’n verdere 28% wat met laerisiko-MPV besmet was; 44% van die vroue was met Chlamydia besmet waarvan 16% een of meer addisionele SOI gehad het. BV persentasies was ook baie hoog met 55% van die vroue wat as BV-positief (Nugent-telling ≥7) geklassifiseer is, 7% as BV-intermediêr (Nugent-telling 3–6), en 38% as BV-negatief (Nugent-telling 0–2). Streptococcus (Streptococcus agalactiae), die grootste oorsaak van neonatale sepsis, was teenwoordig in 25% van die BV-positiewe vroue en 28% van die BV-negatiewe vroue, en was dus meer onder BV-negatiewe vroue. Chlamydia-infeksie sowel as BV kan reproduktiewe gesondheid nadelig beïnvloed en verhoog hierdie vroue se risiko vir die verkryging van MIV. Die voorkoms van veral Prevotella amnii kan die MIV-risiko verhoog as gevolg van sy inflammatoriese kapasiteit. Laboratorium-gebaseerde toetsing vir SOI’s (veral Chlamydia en Gonorrhoeae) blyk in hierdie gemeenskap geregverdig te wees, tesame met verdere monitering en/of behandeling van BV.</p><p><strong>Navorsing korrelasie:</strong> Hierdie artikel is die vertaalde weergawe en is beskikbaar gestel om ‘n breër lesersgroep te bereik. Die oorspronklike Engelse artikel is beskikbaar hier: <a href="https://doi.org/10.4102/satnt.v36i1.1484">https://doi.org/10.4102/satnt.v36i1.1484</a></p>2017-12-12T16:03:49+01:00Copyright (c) 2017 Katie S. Lennard, Smritee Dabee, Shaun L. Barnabas, Enock Havyarimana, Shameem Z. Jaumdally, Gerrit Botha, Nonhlanhla N. Mkhize, Linda-Gail Bekker, Glenda Gray, Nicola Mulder, Jo-Ann Passmore, Heather B. Jaspanhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1489<i>Tecoma stans</i> (Bignoniaceae), leaf extracts, fractions and isolated compound have promising activity against fungal phytopathogens2018-01-12T16:47:46+01:00Moraba M. Meelamoraba.meela@wits.ac.zaLadislaus K. Mdeeeditor@satnt.ac.zaJacobus N. Eloffeditor@satnt.ac.za<p>Plant pathogenic fungi are a major cause of reduced plant production and post-harvest losses of plant produce. The control of these fungi by some synthetic fungicides is complicated by human and environmental toxicity, the development of resistance by some fungi and high costs, thus prompting the investigation of other means of fungal control. Plant secondary metabolites have a good potential as antifungal agents. The aim of this study is to investigate the potential use of <em>Tecoma stans</em> as a plant-derived fungicide by determining the antifungal activity of extracts, isolating the bioactive compound and testing the toxicity of both the extract and the isolated compound. In bioassay-guided fractionation of the leaves of the <em>Tecoma stans</em> dichloromethane (DCM) extract contained one major compound that was isolated and characterised as oleanolic acid. The DCM extract and oleanolic acid were active against 10 tested plant fungal pathogens (<em>Aspergillus niger, Aspergillus parasiticus, Collectotrichum gloeosporoides, Fusarium oxysporium, Penicillum expansum, Penicillum janthinellum, Pythium ultimum, Phytophthora nicotiana, Trichoderma harzianum</em> and <em>Rhizoctonia solani</em>) with an average minimal inhibitory concentration of 130 μg/mL. The DCM extract and oleanolic acid were toxic to Vero cells with an LC<sub>50</sub> of 0.413 mg/mL and 0.129 mg/mL respectively, when compared with berberine, a toxic compound with LC<sub>50</sub> of 15.48 µg/mL. Oleanolic acid was more toxic than the crude extract, supporting the potential use of plant extracts for controlling plant fungal pathogens. The selectivity indices of 20 with several fungi indicated that extracts could possibly be used under controlled conditions against infections of certain fungal pathogens, even on edible plants. The large quantities available of this invasive plant species could lead to a commercially useful product in controlling plant fungal pathogens.</p><p> </p><p><strong>Research correlation:</strong> This article is the translated version, made available to provide access to a larger readership, of which the original English article is available here: https://doi. org/10.4102/satnt.v36i1.1496</p>2017-12-12T16:50:41+01:00Copyright (c) 2017 Moraba M. Meelah, Ladsilaus K. Mdee, Jacobus N. Eloffhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1496Fraksies en geïsoleerde verbinding uit <i>Tecoma stans</i> (Bignoniaceae), ’n indringerplant, het belowende aktiwiteit teen fungus fitopatogene2018-01-12T16:48:08+01:00Moraba M. Meelakobus.eloff@up.ac.zaLadislaus K. Mdeekobus.eloff@up.ac.zaJacobus N. Eloffeditor@satnt.ac.za<p>Fungi wat plante aanval, lei tot groot verliese in plantproduksie en ook tot verliese in opbrengs nadat die produkte geoes is. Die beheer van hierdie fungi deur chemiese fungisiede lewer komplikasies vanweë menslike en omgewingstoksisiteit. Die koste en die ontwikkeling van weerstand deur plantpatogeniese fungi teen fungisiede lewer ook probleme. Sekondêre plantmetaboliete het ‘n goeie potensiaal as antifungusverbindings. Die doel van die studie was om die aktiwiteit van <em>Tecoma stans</em>-ekstrakte en - fraksies te bepaal en om die aktiewe verbinding te isoleer deur die bioaktiwiteit van fraksies gedurende die fraksionering te bepaal. Die dichlorometaanfraksie het die hoogste aktiwiteit gehad en die geïsoleerde verbinding se struktuur is bepaal as oleanolsuur. Die antifungusaktiwiteit is teen tien belangrike plantfunguspatogene bepaal (<em>Aspergillus niger, Aspergillus parasiticus, Collectotrichum gloeosporoides, Fusarium oxysporium, Penicillum expansum, Penicillum janthinellum, Pythium ultimum, Phytophthora nicotiana, Trichoderma harzianum</em> en <em>Rhizoctonia solani</em>). Die gemiddelde minimum inhiberende konsentrasie was 130 μg/mL. Die DCM-ekstrak en oleanolsuur was minder toksies as die positiewe kontrole berberien teen Vero-selle met LC<sub>50</sub> waardes van 0.413 mg/mL, 0.129 mg/mL en 15.48 µg/mL onderskeidelik. Die selektiwiteitindeks van 20 met verskeie fungi dui op moontlike relatiewe veiligheid om onder gekontroleerde toestande selfs vir eetbare produkte te gebruik. Die groot massa plantmateriaal wat van hierdie indringerplant beskikbaar is, mag tot ‘n kommersieel bruikbare produk lei in die bekamping van fitopatogeniese fungi.</p><p><strong><br /></strong></p><p><strong>Navorsing korrelasie:</strong> Hierdie artikel is die vertaalde weergawe en is beskikbaar gestel om ‘n breër lesersgroep te bereik. Die oorspronklike Engelse artikel is beskikbaar hier: https://doi. org/10.4102/satnt.v36i1.1489</p>2017-12-12T16:51:10+01:00Copyright (c) 2017 Moraba M. Meelah, Ladislaus K. Mdee, Jacobus N. Eloffhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1486<i>Sutherlandia frutescens</i> (Fabaceae) extracts used for treating tuberculosis do not have high activity against <i>Mycobacterium smegmatis</i>2018-01-08T12:23:16+01:00Itumeleng H. Mabusahlapsadi@gmail.comRachmond HowardRachmond.howard@ump.ac.zaPeter MasokoPeter.Masoko@ul.ac.za<p><em>Sutherlandia frutescens</em> (L) R. Br. contains several essential, bioactive compounds with clinically proven pharmacological activities. Sutherlandia is prescribed for people with tuberculosis but it is still not known what compounds in this plant act against Mycobacterium tuberculosis and its mode of action. This study is aimed at determining if <em>S. frutescens</em> extracts contain antimycobacterial compounds. Aerial parts of <em>S. frutescens</em> were dried, ground and extracted with ethanol, dichloromethane: methanol 1:1 (v/v) and water. The chemical profiling was done using high-performance liquid chromatography-mass spectroscopy (HPLC-MS) and thin layer chromatography (TLC). TLC plates were developed in butanol:acetic acid:water (BAW) to the ratio of 21:6:3; chloroform:methanol:water:formic acid (CMWF1) [60:15:2:1] and (CMWF2) [21:9:1:0.3]. Qualitative antioxidant activity was done, using 2.2-diphenylpacryl-1-hydrazyl (DPPH). Antimycobacterial activity of the plant extracts was evaluated, using micro-dilution and bioautographic methods against <em>Mycobacterium smegmatis</em>. Low antimycobacterial activity against <em>M. smegmatis</em> was observed on the bioautograms. The ethanol extracts contained more compounds compared to water extracts on HPLC-MS chromatographic profiles. The average Minimum Inhibitory Concentration (MIC) values for all the extracts were 0.61 mg/mL units and the DCM:MeOH (1:1) extract had the lowest MIC value of 0.28 mg/mL. The results showed that the plant could be further explored for possible antimycobacterial agents. Low activity was observed, possibly due to low replication of bacilli and non-replicating organisms. The study provides preliminary scientific validation of the traditional medicinal use of this plant. Further studies are required to identify the bioactive compounds in the DCM:MeOH 1:1 extract which showed significant antimycobacterial activities.</p><p> </p><p><strong>Research correlation:</strong> This article is the original version, of which an Afrikaans translation was made available to provide access to a larger readership, available here: <a href="https://doi.org/10.4102/satnt.v36i1.1494">https://doi.org/10.4102/satnt.v36i1.1494</a></p>2017-12-12T15:38:12+01:00Copyright (c) 2017 Itumeleng H. Mabusa, Rachmond Howard, Peter Masokohttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1494Die toets van ekstrakte uit <i>Sutherlandia frutescens</i> (Fabaceae) op <i>Mycobacterium smegmatis</i> in die behandeling van tuberkulose2018-01-08T12:22:21+01:00Itumeleng H. MabusaPeter.Masoko@ul.ac.zaRachmond HowardPeter.Masoko@ul.ac.zaPeter MasokoPeter.Masoko@ul.ac.za<p><em>Sutherlandia frutescens</em> (L) R. Br. bevat verskeie essensiële bioaktiewe verbindings met farmakologiese aktiwiteit waarvoor daar kliniese bewyse bestaan. Sutherlandia word vir mense met tuberkulose voorgeskryf, maar niemand weet nog watter verbindings in hierdie plant <em>Mycobacterium tuberculosis</em> en die werking daarvan teenwerk nie. Hierdie studie het ten doel om te bepaal of <em>S. frutescen</em>s antimikobakteriese verbindings bevat. Bogrondse dele van <em>S. frutescens</em> is gedroog, gemaal en met etanol:metanol [1:1] (vol./vol.) en water onttrek. Die chemiese profiel is bepaal deur hoëverrigting vloeistofchromatografie-massaspektrometrie en dunlaag-chromatografie te gebruik. Die dunlaagchromatografie is in butanol:asynsuur:water (BAW) [21:6:3], chloroform:metanol:water:mieresuur (CMWM1) [60:15:2:1] en CMWM2 [21:9:1:0.3] ontwikkel. Die kwalitatiewe anti-oksidant-aktiwiteit is bepaal deur 2.2 difeniel-2-pikrielhidrasiel (DFPH) te gebruik. Die antimikobakteriese aktiwiteit van die plantekstrakte is bepaal deur mikro-verdunning en bio-outografiese metodes teen <em>Mycobacterium smeagmatis</em> te gebruik. Ons het lae antimikobakteriese aktiwiteit teen <em>M. smegmatis</em> in die bio-outogramme waargeneem. Die profiele van die hoëverrigting vloeistofchromatograpfie-massaspektrometrie het meer verbindings in die etanolekstrakte as in die waterekstrakte aangedui. Die gemiddelde waardes vir minimum inhibeerderkonsentrasie vir al die ekstrakte was 0.61 mg/mL. Die DCM:MeOH (1:1) ekstrak het die laagste minimum inhibeerderkonsentrasie-waarde, naamlik 0.28 mg/mL gehad. Die resultate het getoon dat die plant verder vir moontlike antimikobakteriese agente ondersoek kan word. Lae aktiwiteit is waargeneem, waarskynlik as gevolg van stadig vermeerderende bacilli en nie-vermeerderende organismes. Die studie bied voorlopige wetenskaplike ondersteuning vir die tradisionele medisinale gebruik van hierdie plant.</p><p> </p><p><strong>Navorsing korrelasie:</strong> Hierdie artikel is die vertaalde weergawe en is beskikbaar gestel om ‘n breër lesersgroep te bereik. Die oorspronklike Engelse artikel is beskikbaar hier: <a href="https://doi.org/10.4102/satnt.v36i1.1486">https://doi.org/10.4102/satnt.v36i1.1486</a></p>2017-12-14T16:25:54+01:00Copyright (c) 2017 Itumeleng H. Mabusa, Rachmond Howard, Peter Masokohttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1453Triphenylarsine and stibine Fischer carbene complexes: Synthesis, structure, and electrochemistry2017-12-21T17:02:13+01:00Armand Jansen van Rensburgajvrensburg33@gmail.comMarilé Landmanmarile.landman@up.ac.zaNo abstract avialble.2017-07-19T13:28:30+02:00Copyright (c) 2017 Armand Jansen van Rensburg, Marilé Landmanhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1454Resilience of conservancies in the Western Cape: A social, economic and spatial perspective2017-12-21T17:02:13+01:00Nina Botha16958039@sun.ac.zaSanette L.A. Ferreiraslaf@sun.ac.zaNo abstract available.2017-07-19T13:28:34+02:00Copyright (c) 2017 Nina Botha, Sanette L.A. Ferreirahttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1455A comparative study of a Pt<sub>x</sub> Ni<sub>y</sub> Al<sub>z</sub> electrocatalyst (as-deposited and annealed) for the oxygen reduction reaction (ORR)2017-12-21T17:02:13+01:00De Wet Coertzencoertzen22@gmail.comRoelof J. Kriekcobus.kriek@nwu.ac.zaAnzel Falchcoertzen22@gmail.com<p>No abstract available.</p>2017-07-19T13:28:36+02:00Copyright (c) 2017 De Wet Coertzen, Roelof J. Kriek, Anzel Falchhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1456The effect of an alternative notation on the comprehension of mathematical concepts among Grade 12 learners2017-12-21T17:02:13+01:00Susanna H. du Plessissantjie@gmail.comVreda Pietersevpieterse@cs.up.ac.zaNo abstract available.2017-07-19T13:28:40+02:00Copyright (c) 2017 Susanna H. du Plessis, Vreda Pietersehttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1457Determination of the optical thermometry properties of a phosphor material for application as an optical temperature sensor2017-12-21T17:02:13+01:00Lucas J.B. ErasmusErasmusLB@ufs.ac.zaJacobus J. TerblansTerblansJJ@ufs.ac.zaHendrik C. SwartSwartHC@ufs.ac.zaNo abstract available.2017-07-19T13:28:43+02:00Copyright (c) 2017 Lucas J.B. Erasmus, Jacobus J. Terblans, Hendrik C. Swarthttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1458The distribution and characteristics of deep-seated paleo-mass movements in the northern and central Drakensberg2017-12-21T17:02:13+01:00Abraham C. Greylingegreyla1@unisa.ac.zaPaul D. Sumnerpaul.sumner@up.ac.zaNo abstract available.2017-07-19T13:28:47+02:00Copyright (c) 2017 Abraham C. Greyling, Paul D. Sumnerhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1459Accuracy comparison of satellite images using alternative ground control points (GCPs) through performing orthorectification2017-12-21T17:02:14+01:00Ivan Henricoivan.henrico@sita.co.zaLudwig Combrinckludwig@hartrao.ac.zaCorné Eloffcorne.eloff@airbus.comNo abstract available.2017-07-19T13:28:50+02:00Copyright (c) 2017 Ivan Henrico, Ludwig Combrinck, Corné Eloffhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1460Wine tourism development in South Africa2017-12-21T17:02:14+01:00Caitlin A. Hunter16689410@sun.ac.zaSanette L.A. Ferreiraslaf@sun.ac.zaNo abstract available.2017-07-19T13:28:54+02:00Copyright (c) 2017 Caitlin A. Hunter, Sanette L.A. Ferreirahttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1461Characterisation of {<i>P</i><sub>4</sub>, <i>K</i> ̅<sub>3</sub>}-free graphs2017-12-21T17:02:14+01:00Estiaan M. Klemestiaanklem@gmail.comSanne ter Horstsanne.terhorst@nwu.ac.zaNo abstract available.2017-07-19T13:28:58+02:00Copyright (c) 2017 Estiaan M. Klem, Sanne ter Horsthttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1462The development of a Cu(I)/Bis(pyridyl)-N-alkylamine catalyst system for selective alcohol oxidation2017-12-21T17:02:14+01:00Lindie Marais23459093.nwu@gmail.comJordi Burésjordi.bures@manchester.ac.ukJohan H.L. JordaanJohan.Jordaan@nwu.ac.zaSelwyn MapolieSelwyn.Mapolie@sun.ac.zaAndrew J. SwartsAndrew.Swarts@nwu.ac.za<span>No abstract available.</span>2017-07-19T13:29:01+02:00Copyright (c) 2017 Lindie Marais, Jordi Burés, Johan H.L. Jordaan, Selwyn Mapolie, Andrew J. Swartshttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1463Environmental reasoning of secondary-level schoolchildren: Case study of Okahandja, Namibia2017-12-21T17:02:14+01:00Tiani Moolmanmoolmt@unisa.ac.zaSanette L.A. Ferreiraslaf@sun.ac.zaNo abstract is available.2017-07-19T13:29:05+02:00Copyright (c) 2017 Tiani Moolman, Sanette L.A. Ferreirahttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1464Dissolution of nuclear conversion plant waste2017-12-21T17:02:14+01:00Marcelle Potgietermarcelle.potgieter@necsa.co.zaJohn C. Barryjohn.barry@necsa.co.zaDerik J. van der Westhuizenderik.vanderwesthuizen@nwu.ac.zaHenning M. Krieghenning.krieg@nwu.ac.zaNo abstract available.2017-07-19T13:29:08+02:00Copyright (c) 2017 Marcelle Potgieter, John C. Barry, Derik J. van der Westhuizen, Henning M. Krieghttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1465A continuous flow synthesis of the anti-inflammatory COX-II inhibitor Celecoxib2017-12-21T17:02:14+01:00Chantal ScholtzChantal.scholtz@up.ac.zaDarren L. RileyDarren.riley@up.ac.zaNo abstract available.2017-07-19T13:29:11+02:00Copyright (c) 2017 Chantal Scholtz, Darren L. Rileyhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1466Fe catalysed alkene oxidation: Effect of steric and electronic properties on non-heme oxygenase activity2017-12-21T17:02:14+01:00Lizette Swartzberglizetteswartzberg@gmail.comCornie G.C.E. van SittertCornie.VanSittert@nwu.ac.zaAndrew J. SwartsAndrew.Swarts@nwu.ac.zaNo abstract available.2017-07-19T13:29:15+02:00Copyright (c) 2017 Lizette Swartzberg, Cornie G.C.E. van Sittert, Andrew J. Swartshttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1467The long and short of cataclysmic variables: A multi-wavelength follow-up study2017-12-21T17:02:14+01:00Hélène Szegediszegedih@ufs.ac.zaAlida OdendaalWinkA@ufs.ac.zaPieter J. MeintjesMeintjPJ@ufs.ac.zaNo abstract available.2017-07-19T13:29:19+02:00Copyright (c) 2017 Hélène Szegedi, Alida Odendaal, Pieter J. Meintjeshttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1468Molecular modelling of tantalum penta-halides during hydrolysis and oxidation reactions2017-12-21T17:02:14+01:00Marietjie J. UngererMarietjie.Ungerer@nwu.ac.zaCornelia G.C.E. van Sittertcornie.vansittert@nwu.ac.zaDerik J. van der Westhuizenderik.vanderwesthuizen@nwu.ac.zaHenning M. Krieghenning.krieg@nwu.ac.zaNo abstract available.2017-07-19T13:29:22+02:00Copyright (c) 2017 Marietjie J. Ungerer, Cornelia G.C.E. van Sittert, Derik J. van der Westhuizen, Henning M. Krieghttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1469A spatial-analytical investigation of the rainfall and temperature patterns over Southern Africa2017-12-21T17:02:14+01:00Adriaan J. van der Waltvanderwalta@ufs.ac.zaCharles H. Barkerbarkerch@ufs.ac.zaNo abstract available.2017-07-19T13:29:26+02:00Copyright (c) 2017 Adriaan J. van der Walt, Charles H. Barkerhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1470Spheroidisation of iron powder in a microwave plasma reactor2017-12-21T17:02:14+01:00Jean H. van Laarjean.vanlaar@necsa.co.zaHertzog Bissetthertzog.bissett@necsa.co.zaJohn C. Barryjohn.barry@necsa.co.zaIsak J. van der Waltjaco.vanderwalt@necsa.co.zaPhilip L. Crousephilip.crouse@up.ac.zaNo abstract available.2017-07-19T13:29:30+02:00Copyright (c) 2017 Jean H. van Laar, Hertzog Bissett, John C. Barry, Isak J. van der Walt, Philip L. Crousehttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1471The coordination chemistry of rhenium-benzazole complexes as potential diagnostic imaging agents for Alzheimer’s disease2017-12-21T17:02:14+01:00Xandri van Niekerkxandrivanniekerk@gmail.comThomas I.A. GerberThomas.Gerber@nmmu.ac.zaNo abstract available.2017-07-19T13:29:35+02:00Copyright (c) 2017 Xandri van Niekerk, Thomas I.A. Gerberhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1472Conservation volunteer tourism in the Hartbeespoort area2017-12-21T17:02:14+01:00Su-Marie van Tondervantondersm@gmail.comElizabeth Blockeblock@uj.ac.zaNo abstract available.2017-07-19T13:29:38+02:00Copyright (c) 2017 Su-Marie van Tonder, Elizabeth Blockhttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1475Corrigendum: Die wisselende rol van kontinuïteit en diskontinuïteit in die geskiedenis van die filosofie en die wiskunde2017-12-21T17:02:14+01:00Danie F.M. Straussdfms@cknet.co.zaNo abstract available.2017-07-28T11:20:46+02:00Copyright (c) 2017 Danie F.M. Strausshttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1498Corrigendum: <i>Tecoma stans</i> (Bignoniaceae), leaf extracts, fractions and isolated compound have promising activity against fungal phytopathogens2018-01-12T16:33:30+01:00Moraba M. Meelakobus.eloff@up.ac.zaNo abstract available.2017-12-31T00:00:00+01:00Copyright (c) 2018 Moraba M. Meelahttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1499Corrigendum: Fraksies en geïsoleerde verbinding uit <i>Tecoma stans</i> (Bignoniaceae), ’n indringerplant, het belowende aktiwiteit teen fungus fitopatogene2018-01-12T16:33:38+01:00Moraba M. Meelakobus.eloff@up.ac.zaGeen opsomming beskikbaar nie.2017-12-31T00:00:00+01:00Copyright (c) 2018 Moraba M. Meelahttps://journals.satnt.aosis.co.za/index.php/satnt/article/view/1497Erkenning aan evalueerders2018-01-08T12:22:21+01:00Editorial Officesubmissions@satnt.ac.za2017-12-21T17:01:58+01:00Copyright (c) 2017 Editorial Office