Analysis of the Detection of Organophosphate Pesticides in Aqueous Solutions Using Hydrogen-Bond Acidic Coating on SH-SAW Devices

The work presented in this paper focuses on the synthesis and characterization of a hybrid organic/inorganic chemically sensitive layer for rapid detection and analysis of OPs in aqueous solutions using SH-SAW devices. Coated SH-SAW devices on 36° YX-LiTaO and 42.75° YX-Quartz (ST-90° X Quartz), are used to determine the optimum operating conditions for achieving rapid sensor responses with high sensitivity. Three analytes (parathion-methyl, parathion, and paraoxon), having similar molecular mass and volume, are used to evaluate the performance of the hybrid organic/inorganic coating in terms of sensor properties of interest including sensitivity, selectivity, reproducibility. It is shown that the coating has a high degree of partial selectivity and sensitivity towards the analytes. With the present non-optimized chemical sensor, a limit of detection of 60 (ppb), 20 (ppb) and 100 (ppb) is estimated for parathion-methyl, parathion, and paraoxon, respectively, when using a 0.5 -thick BPA-HMTS sensing layer. Concentrations as low as 500 (ppb) parathion have been measured. This concentration is significantly much lower than the typical concentrations found on agricultural produce (≥10 ppm)

The brain drain of teachers in South Africa: identifying the dynamics of its push factors

South Africa over the years has been losing a considerable number of teachers and this has become a growing concern among policymakers. Therefore, the objective of this paper is to identify the factors that are responsible for enticing teachers to migration out of South Africa. Using a strict textual analysis of the relevant literature, this paper reveals that South Africa has failed to reduce the emigration of teachers due to poor salaries and working conditions, subsequently, this has seen as agents from developed countries (recently Asian countries) aggressively recruiting teachers from the country. Other factors include poor infrastructure and limited career progression opportunities. The study showed that the brain drain of teachers results in a shortage of teachers in rural areas and increased inefficiency in the public educational system. It is therefore suggested that the government should make the retention of teachers a priority through incentives such as promotion, better salaries and the upgrading of infrastructure. The study concluded that teacher emigration has been a long-existing issue in South Africa and the mere fact that there has been no clear cut plan on how to deal with it is deeply worrying, moreover, today in South African schools, the issue of security has become a focal point, the failure to guarantee the safety of teachers in schools has been seen as a new factor encouraging migration either within the country or abroad

Using Technology to Address Cross Border Crime and Illegal Migration: The Case of South Africa

The 1996 Constitution of South Africa includes the right of every South African to freedom and security. It is the government’s responsibility to guarantee that national security is maintained and that residents within the limits of South African borders are protected. Based on this assumption, the issue of border management and migration regulations is presumed to be critical. Poor border management and unregulated migration jeopardise national security and endanger residents’ freedom and security. This article contends that South Africa’s inadequate border control and unrestrained migration have jeopardised the country’s national security. As a result of the inadequacy of border control in South Africa, South Africans have resorted to various xenophobic actions, with many foreign nationals losing their lives in the process. This article examines the current policy responses to migration and security at border crossings and what has gone wrong in South African border management. A qualitative research technique was used to fulfil the goals of this paper

Early-stage venture capital in South Africa: Challenges and prospects

The aim of this paper is to assess which factors impact the development of early-stage venture capital in South Africa. Factors identified for other markets and countries are explored and their relative importance in South Africa determined from the perspective of market participants. These include venture capital and private equity fund managers, government institutions, intermediaries and university research coordinators. The study used both an online survey, to capture a broad representation of opinion, and interviews, for in-depth responses. There was broad consensus among respondents with regards to the key factors requiring attention, which include the lack of funds targeted at early-stage investments, the lack of specialised fund managers, and the low entrepreneurial skillsets in the country. Through a detailed analysis of the responses, certain measures are proposed that can enhance the development of early-stage venture capital in South Africa such as engaging more with angel investors and improving the cooperation between the different market players in the sector

Factors influencing venture capitalists' project financing decisions in South Africa

CITATION: Van Deventer, B. & Mlambo, C. 2009. Factors influencing venture capitalists' project financing decisions in South Africa. South African Journal of Business Management, 40(1):a533, doi:10.4102/sajbm.v40i1.533.The original publication is available at https://sajbm.orgThis study explores and identifies the investment criteria used by South African venture capitalists in their venture screening and evaluation processes. Using a Likert scale type of questionnaire, South African venture capitalists (VCs) were asked to rate the investment criteria identified in similar studies abroad and to report any additional criteria of their own. By evaluating the mean ratings, it was found that South African VCs consider the entrepreneur's honesty and integrity; a good expected market acceptance; and a high internal rate of return (IRR), to be the three most important criteria. The South African VCs, just like their overseas counterparts, regard management considerations to be the most important criteria group in the evaluation of new investment projects. The results of this study are deemed useful to both venture capitalists in their decision-making process and to entrepreneurs in their venture capital applications to maximise their success rate.https://sajbm.org/index.php/sajbm/article/view/533Publisher's versio

Induction of labour with titrated oral Misoprostol suspension: a comparative study with vaginal Misoprostol

A CAJM journal article comparing the effectiveness of titrated orally and vaginally administered misoprostol for induction of labour administered at the University of Zimbabwe Teaching Hospital..Objective: To compare the effectiveness of titrated orally and vaginally administered misoprostol for induction of labour. Study Design: Unmasked randomized controlled trial. Setting: Department of Obstetrics and Gynaecology University of Zimbabwe, Harare. Subjects: Pregnant women with singleton foetus in cephalic presentation booked for induction of labour, were randomized to receive titrated orally or vaginally administered misoprostol. Main Outcome Measures: The main outcomes were the duration of labour and induction to delivery interval. The secondary outcomes were neonatal and maternal complications. Methods: 134 women were recruited into the study; 69 and 65 were randomized into orally and vaginally administered misoprostol respectively. Results: The baseline characteristics in the two groups were similar. Women induced with titrated oral misoprostol suspension had a shorter interval from administration of the drug to initiation of uterine contractions (OR = 0.94 .95% Cl 0.42 to 2.12 ) and a longer duration of labour (OR = 0.36; 95% Cl 0.16 to 0.79). Labour was augmented with oxytocin in the oral group. The mean drug dose was 28mcg in the oral group. There was no difference in the mode of delivery between the two groups. Hypertonic uterine contractions were not detected. Ruptured uterus did not occur in the study population. There were more neonatal admissions in the vaginal than the oral group (OR = 1.03 .95% Cl 0.29 to 1.39). Conclusion: Titrated oral misoprostol suspension is as effective and safe as vaginal misoprostol for induction of labour even in poor resource countries where intrapartum monitoring is inadequate

The Challenges of Youth Entrepreneurship from a Local Government Perspective in South Africa

This paper examines the challenges of youth entrepreneurship and aims to understand whether the local government sector in South Africa can act as a catalyst in consolidating youth entrepreneurship. The local government sector is essential in South Africa as it is mandated to grow and improve local infrastructure and community services and contribute towards economic development. Opening opportunities for young people in the entrepreneurship domain can help reduce unemployment. Through funding and training opportunities, the local government sector, a branch of government closer to the people, can play a significant role in fostering youth entrepreneurship. A qualitative research approach was employed where a literature review was untaken. Findings revealed that an increasing youth unemployment rate faced South Africa, negatively affecting the need for inclusive development. The paper found that local government can contribute towards reducing youth unemployment by implementing programs encouraging and capacitating youth entrepreneurship and prioritizing entrepreneurship education. However, it was also revealed that the local government sector is confronted with several challenges, such as corruption, wasteful expenditure, and a lack of skilled personnel. Unless these issues are addressed, it will be impossible for the sector to consolidate policies that support and encourage youth entrepreneurship. Keywords:   Entrepreneurship; Development; Inclusive; Support; Unemployment; Yout

Protected and un-protected urban wetlands have similar aquatic macroinvertebrate communities: a case study from the Cape Flats Sand Fynbos region of southern Africa

Rapid urbanisation has led to major landscape alterations, affecting aquatic ecosystems’ hydrological and biogeochemical cycles, and biodiversity. Thus, habitat alteration is considered a major driver of aquatic biodiversity loss and related aquatic ecosystem goods and services. This study aimed to investigate and compare aquatic macroinvertebrate richness, diversity and community structure between urban temporary wetlands, located within protected and un-protected areas. The latter were found within an open public space or park with no protection or conservation status, whereas the former were inaccessible to the public and had formal protected, conservation status

Maternal near miss and maternal death in the Pretoria Academic Complex, South Africa: A population-based study

Background. In order to reduce maternal mortality in South Africa (SA), it is important to understand the process of obstetric care, identify weaknesses within the system, and implement interventions for improving care.Objective. To determine the spectrum of maternal morbidity and mortality in the Pretoria Academic Complex (PAC), SA.Methods. A descriptive population-based study that included all women delivering in the PAC. The World Health Organization definition, criteria and indicators of near miss and maternal death were used to identify women with severe complications in pregnancy. Results. Between 1 August 2013 and 31 July 2014, there were 26 614 deliveries in the PAC. The institutional maternal mortality ratio was 71.4/100 000 live births. The HIV infection rate was 19.9%, and 2.7% of women had unknown HIV status. Of the women, 1 120 (4.2%) developed potentially life-threatening conditions and 136 (0.5%) life-threatening conditions. The mortality index was 14.0% overall, 30.0% for non-pregnancy-related infections, 2.0% for obstetric haemorrhage and 13.6% for hypertension. Of the women with life-threatening conditions, 39.3% were referred from the primary level of care. Vascular, uterine and coagulation dysfunctions were the most frequent organ dysfunctions in women with life-threatening conditions. The perinatal mortality rate was 26.9/1 000 births overall, 23.1/1 000 for women with non-life-threatening conditions, and 198.0/1 000 for women with life-threatening conditions. Conclusion. About one in 20 pregnant women in the PAC had a potentially life-threatening condition; 39.3% of women presented to a primary level facility as an acute emergency and had to be transferred for tertiary care. All healthcare professionals involved in maternity care must have knowledge and skills that equip them to manage obstetric emergencies. Review of the basic antenatal care protocol may be necessary.

Freshwater mussel conservation: A global horizon scan of emerging threats and opportunities

We identified 14 emerging and poorly understood threats and opportunities for addressing the global conservation of freshwater mussels over the next decade. A panel of 17 researchers and stakeholders from six continents submitted a total of 56 topics that were ranked and prioritized using a consensus-building Delphi technique. Our 14 priority topics fell into five broad themes (autecology, population dynamics, global stressors, global diversity, and ecosystem services) and included understanding diets throughout mussel life history; identifying the drivers of population declines; defining metrics for quantifying mussel health; assessing the role of predators, parasites, and disease; informed guidance on the risks and opportunities for captive breeding and translocations; the loss of mussel-fish co-evolutionary relationships; assessing the effects of increasing surface water changes; understanding the effects of sand and aggregate mining; understanding the effects of drug pollution and other emerging contaminants such as nanomaterials; appreciating the threats and opportunities arising from river restoration; conserving understudied hotspots by building local capacity through the principles of decolonization; identifying appropriate taxonomic units for conservation; improved quantification of the ecosystem services provided by mussels; and understanding how many mussels are enough to provide these services. Solutions for addressing the topics ranged from ecological studies to technological advances and socio-political engagement. Prioritization of our topics can help to drive a proactive approach to the conservation of this declining group which provides a multitude of important ecosystem services.This publication is based upon work from COST Action CA18239, supported by COST (European Cooperation in Science and Technology). DCA was supported by Corpus Christi College and a Dawson Fellowship at St. Catharine's College, Cambridge. MLL was supported by FCT-Fundacao para a Ciencia e a Tecnologia (2020.03608.CEECIND). ISO was supported by a Whitten Studentship. INB was supported by the Russian Science Foundation (grant no. 21-17-00126). YVB was supported by RSF project no. 21-14-00092. KD was supported by the Czech Science Foundation (19-05510 S). TZ was supported by statutory funds of IOP PAN. MK was supported by funding through the Australian National Environmental Science Program. For the purpose of open access, the author has applied a Creative Commons Attribution (CC BY) licence to any Author Accepted Manuscript version arising from this submission