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Granulated micro-fine limes have recently been introduced as liming materials which are purportedly more effective than conventional agricultural limes in terms of rapidly correcting subsoil acidity in no-tillage systems. Hydrated limes are known to react more quickly in soils than calcitic limes, yet their soil permeability has not been evaluated under Mediterranean climate growing conditions. Therefore, the aim of this controlled study was to compare soil permeation and pH neutralization of different liming materials (hydrated lime, calcitic agricultural lime, micro-fine lime and molasses-granulated micro-fine lime) in two contrasting (sand and sandy loam) acid (pHKCl < 4.1) topsoils under simulated Mediterranean climate conditions. Limes were surface applied to 40 cm soil columns and then rainfall (350 mm) was simulated. Subsequently, soil chemical properties (pH, exchangeable cations, available P) were measured in 5 cm increments. Application of all liming materials increased soil pH 1–2 pH units above target pHKCl of 5.5 in the top 5 cm of both soils. Only hydrated lime was able to increase soil pHKCl (5.7–6.8) below 5 cm up to a depth of 15 cm on the sand soil. Hydrated lime, however, resulted in substantial over-liming (pHKCl 7.3–8.7) of the top 5 cm of soil compared to the other materials. Granulated micro-fine lime reacted more slowly than the agricultural limes and is therefore not a suitable quick-fix for subsoil acidity in rain-fed no-till systems under Mediterranean climate rainfall conditions. Whereas hydrated lime showed potential in ameliorating subsoil acidity in the sand soil within one season of rainfall. [ABSTRACT FROM AUTHOR]

Cutibacterium acnes, Staphylococcus epidermidis, and Staphylococcus aureus proliferate within accumulated sebum and produce localised inflammation thereby inducing acne vulgaris. Essential oils are one of the leading natural products used for acne and are diluted in fixed oils to reduce irritation and toxicity. This study investigated the in vitro antimicrobial, anti-inflammatory, cytotoxicity, and skin retention properties of Rosa rubiginosa rosehip fixed oil in combination with essential oils having activity against acne vulgaris. The broth microdilution assay was used to determine the minimum inhibitory concentration (MIC), and the sum of the fractional inhibitory concentration index (ΣFIC) was calculated for the interactions. The lipopolysaccharide (LPS) induced inflammatory pathway in RAW 264.7 macrophages was used to assess anti-inflammatory activity. A dual-staining method in A549 epithelial cells was used to assess cytotoxicity. Qualitative Fourier Transform Infrared spectroscopy analysis was used for initial skin retention determination. Rosa rubiginosa oil combined with Cinnamomum zeylanicum essential oil displayed antimicrobial synergy (MIC = 0.42 mg/ mL; ΣFIC = 0.45) against three acne-inducing strains. Rosa rubiginosa fixed oil combined with Styrax benzoin essential oil suppressed LPS-induced nitrite production by 33.80%. Rosa rubiginosa oil combined with Melaleuca quinquenervia essential oil exhibited the lowest cytotoxicity (84.32% cell viability). Rosa rubiginosa oil combined with either C. zeylanicum, Eugenia caryophyllata, Rosa damascena or S. benzoin essential oil was retained within the porcine skin. Rosa rubiginosa fixed oil serves as an ideal carrier oil that can potentiate selected essential oils for the treatment of acne vulgaris. [ABSTRACT FROM AUTHOR]

In the Nama-Karoo, grazing by livestock is an important driver of Karoo shrub composition. Many different breeds of livestock are farmed in the Nama-Karoo, and the stocking rate varies greatly over the region. In this study we examine how grazing by dorper and merino sheep applied at three stocking rates affected two Karoo shrublands on a long-term grazing trial at Grootfontein in the eastern Karoo. The effects of grazing treatment on shrub communities at two sites of the Afrikaner-Hereford grazing trial differed greatly and were measurable after ten years of rest. At the sandier, grassier Afrikaner site, heavy grazing by dorper sheep had a significant effect on shrub composition, density and cover, whereas the effect of grazing treatment was less pronounced at the Hereford site. Lenient grazing by merino sheep resulted in a vastly different community compared to all other grazing treatments. Individual Karoo shrub species responded differently to grazing treatment. Overall shrub recruitment has faltered for all but three species, and populations were dominated by intermediate-sized and large individuals. Results indicate that grazing management, animal type and stocking rate are important determinants of Nama-Karoo rangeland composition and structure with evidence of a legacy effect longer than ten years. [ABSTRACT FROM AUTHOR]

Entrepreneurship education is critical to many countries’ efforts to ameliorate youth unemployment. Embedding entrepreneurship content or skills into school subjects can contribute to these efforts. Although youth unemployment is especially rife in South Africa, its school curriculum does not include extensive entrepreneurship education. For these reasons, researchers have been investigating and proposing various ways to develop and expand entrepreneurship in the school curriculum. Previous studies have explored if and how entrepreneurship could potentially be purposely embedded in the South African Senior Phase Technology curriculum, finding positive potential for such an endeavour. Still, most studies have only explored the intended curriculum without considering their implementation in the enacted curriculum. Technology teachers’ voices—the enactors of the intended curriculum—were therefore overlooked. The current study explored the perceptions of experienced Technology teachers regarding the feasibility of embedding entrepreneurship education in the existing Senior Phase Technology curriculum. Technology teachers were invited to make practical suggestions for merging entrepreneurship into the Technology curriculum. A qualitative phenomenological strategy of inquiry was used. Purposive sampling resulted in 30 experienced Technology Education teachers from the North West province completing a questionnaire. Data were analysed thematically and several interesting findings emerged. Technology teachers were overwhelmingly supportive of embedding entrepreneurship in this subject, offering numerous practical and feasible suggestions in this regard. These suggestions could be used to strengthen the intended and enacted Technology curriculum in South Africa by making the learning therein more meaningful and life-relevant for learners. [ABSTRACT FROM AUTHOR]

Fungal infections present a challenge when it comes to topical treatment failure thereby necessitating the need for more effective topical delivery systems. Essential oils have demonstrated noteworthy antifungal activity; however, their volatility limits therapeutic use for skin conditions. This study aimed to investigate the antifungal activity of essential oils alone and in combination. Thereafter, antifungal nanoparticulate formulations were designed using three essential oil combinations against Microsporum canis, Trichophyton mentagrophytes and Candida albicans. The antifungal activity was investigated using the broth microdilution assay to determine the minimum inhibitory concentration (MIC). The formulations were prepared by forming nanoparticles (polymer-based and composite lipid-polymer-based systems), with the preferred formulation encapsulating the essential oil combinations. Characterisation of the formulations was performed with a Zeta-sizer and using attenuated total reflectance-fourier transform infrared spectroscopy (ATR-FTIR). The in vitro antifungal activity of the three nanoparticulate formulations was then determined, where a significant (p = 0.002) increase in the average antidermatophyte activity could be observed for all three formulations. The combination of A. sativum and C. martinii displayed the lowest MIC value across all three reference strains (MIC values 0.06-0.38 mg mL-1) and the formulation maintained the antifungal activity with MIC values ranging 0.08-0.36 mg mL-1. A successful combination of essential oils with antifungal activity was achieved thereby emphasising an effective nanoparticulate formulation. [ABSTRACT FROM AUTHOR]

Social anxiety may disrupt the empathic process, and well-regulated empathy is critical for navigating the social world. Two studies aimed to further understand empathy in the context of social anxiety. Study 1 compared individuals with elevated or normative social anxiety on a measure assessing cognitive and affective empathy for positive and negative emotions conveyed by other people ("targets"), completed under social threat. Relative to individuals with normative social anxiety, individuals with elevated social anxiety had greater cognitive empathy and no differences in affective empathy, regardless of emotion type. As greater cognitive empathy can be maladaptive, Study 2 tested whether this could be down-regulated. Individuals with elevated social anxiety underwent emotional working memory training (eWMT) for negative emotional information, or control training (CT). Effects on an empathy measure completed under social threat were assessed. Cognitive empathy for negative emotions decreased following eWMT but not CT, and this was only evident for those with higher pre-training working memory capacity. Cognitive empathy for positive emotions and affective empathy were not affected. Overall, social anxiety is associated with aberrant elevated cognitive empathy for negative and positive emotions, and the deviation in cognitive empathy for negative emotions can be regulated with eWMT for certain individuals. Trial registration: Australian New Zealand Clinical Trials Registry identifier: ACTRN12618001196235.. [ABSTRACT FROM AUTHOR]

Why is it that South Africa's 'land question' is so stubbornly resistant to resolution? This think piece re-examines 30 years of debate, concentrating on the disjuncture between the discourses of policy deliberation and those of contentious politics in debates about land in South Africa. It argues that the South African land debate as it unfolds in the public realm is best understood as a displaced discourse indirectly addressing the terms of political belonging and the nature of the post-apartheid political order. Far from being a distraction, this is a challenge that urgently needs to be confronted in its own terms. Drawing on the work of Ivor Chipkin, the paper argues that confronting the crisis of the post-apartheid political order requires a rethinking of the terms in which national identity is conceived. The paper explores the possibilities and challenges facing a politics of belonging centred on the Constitutional invocation of a political community 'for all who live in it' and what this might imply for a more constructive and productive engagement with land struggles in urban and rural South Africa. [ABSTRACT FROM AUTHOR]

Gradual onset injuries (GOIs) in recreational cyclists are common but not well described. The aim of this study is to describe the clinical characteristics of GOIs (main anatomical regions, specific anatomical sites, specific GOIs, tissue type, severity of GOIs, and treatment modalities) of GOIs among entrants participating in a community-based mass participation-cycling event over 5 years. During the 2016–2020 Cape Town Cycle Tour, 62,758 consenting race entrants completed an online pre-race medical screening questionnaire. 1879 reported GOIs in the previous 12 months. In this descriptive epidemiological study, we report frequency (% entrants) of GOIs by anatomical region/sites, specific GOI, tissue type, GOI severity, and treatment modalities used. The main anatomical regions affected by GOIs were lower limb (47.4%), upper limb (20.1%), hip/groin/pelvis (10.0%), and lower back (7.8%). Specifically, GOI were common in the knee (32.1%), shoulder (10.6%), lower back (7.8%) and the hip/buttock muscles (5.2%). The most common specific GOI was anterior knee pain (17.2%). 57.0% of GOIs were in soft tissue. Almost half (43.9%) of cyclists with a GOI reported symptom duration >12 months, and 40.3% of GOIs were severe enough to reduce/prevent cycling. Main treatment modalities used for GOIs were rest (45.9%), physiotherapy (43.0%), stretches (33.2%), and strength exercises (33.1%). In recreational cyclists, >50% of GOIs affect the knees, shoulders, hip/buttock muscles and lower back, and 40% are severe enough to reduce/prevent cycling. Almost 45% of cyclists with GOIs in the lower back; or hip/groin/pelvis; or lower limbs; or upper limb reported a symptom duration of >12 months. Risk factors associated with GOIs need to be determined and preventative programs for GOIs need to be designed, implemented, and evaluated. [ABSTRACT FROM AUTHOR]

Sepsis is defined as a life-threatening organ dysfunction caused by a dysregulated host response to infection, which can result in multi-organ failure and death due to a combination of tissue hypoperfusion, impairment of the coagulation system and oxidative stress. There is no validated gold standard for the diagnosis of sepsis, either antemortem or post-mortem. To fill the gap, other ancillary tests are performed, which may include blood cultures, immunohistochemical markers and biomarkers. [ABSTRACT FROM AUTHOR]

In 2015, the combined average life expectancy for males and females in Australia was ranked 6th in the world at 82.5 years. The exact age at which a person can be classified as being elderly will differ amongst countries but is generally between 60–65 years. The increase in life expectancy and increased recognition of the elderly as a vulnerable group will most likely lead to an increased workload in the medico-legal death investigation system. [ABSTRACT FROM AUTHOR]

Background: Fluoroscopy-guided endoscopic placement of nasojejunal tubes (NJT) for perioperative short- or medium-term enteral nutrition (EN) is potentially required for anatomical gastric feed intolerance. Methods: Indication for NJT and successful insertion rates was determined. NJT insertion costs were calculated and compared with central venous catheter (CVC) insertion. Duration of NJT patency in non-critical care surgical patients was determined in days in a local cohort. EN costs were calculated over a hypothetical 28-day period factoring in expected NJT replacements due to blockage and compared with parenteral nutrition (PN) via CVC, which included routine CVC changes every 10 days. Public and private sectors were compared. Results: One hundred and two (93.6%) NJTs were placed successfully, with gastric outlet obstruction the most frequent indication (40.4%) with a median 10 days' (range 1-68 days, IQR 6-16.75 days) usage. Irrevocable blockage occurred in 33 tubes after a median 9 days (range 3-34 days; IQR 4.75-16 days). Calculated EN costs over 28 days, including NJT replacement every 9 days, reached US$1 676.12 and PN costs with CVC replacement every 10 days, US$3 461.35 (p < 0.001) in the public sector. In the private sector PN costs at 28 days were significantly higher (p < 0.001) at US$5 261.14 compared with EN US$3 780.71. The cost benefit of EN over PN is seen after three days in the public, and four days in the private sector. Conclusion: Exponential cost saving occurs with EN via NJT over time, even when factoring in the likelihood of NJT replacements. [ABSTRACT FROM AUTHOR]

Early childhood development research typically focusses on populations that are either of upper or lower socioeconomic status. A population especially overlooked is the 'missing-middle', represented by middle-income, urban populations. Knowledge of children's development from middle-income populations to guide the implementation and customisation of early intervention policies, is needed. The Vineland-3 was used to describe the developmental outcomes of 55 young children, six to 24 months old, from an urban, middle-income setting in South Africa. The mHealth PEDS was used to identify caregivers' developmental concerns. Caregivers' concerns were positively associated with their children's developmental outcomes (φ = 0.355; p = .024), emphasising their valuable contribution in early identification of developmental delays. Fifteen percent (n = 8) of participants' children presented with developmental delays, with low birth weight identified as a significant risk (φ = 0.415; p = .011) and higher maternal education as a significant protective factor (φ = 0.365; p = .016). High gross motor proficiency appears to be a strength within this population, while receptive language and play skills require attention. Early childhood development should be prioritised across all socioeconomic classes to help ensure that children from the 'missingmiddle' do not miss out on the opportunity to thrive. [ABSTRACT FROM AUTHOR]

Knowledge brokers thus have a crucial responsibility to contribute to shifting the discourse away from the linear production of (broad, untailored) scientific-only knowledge (e.g. on the climate problem) to understanding, navigating and "acting" in this complex decision-making and implementation reality. The Manifesto defined climate knowledge brokers as those who "are brokering the transfer of knowledge related to the climate from a person or organisation to another via the medium of information". Knowledge brokers have long been understood as the link between the producers and users of knowledge (Bielak et al. [1]). [Extracted from the article]

A case has been made by various authors that the normative and processual notion of personhood found in African philosophy is discriminatory: it has been labelled as sexist, ableist and anti-queer. Within the anti-queer critique, one area that has not been specifically addressed in the literature is whether this notion of personhood is biased against people who identify as non-binary with respect to gender. This includes people who are gender fluid and gender neutral, among others. In this article, we argue that the binary conception of gender is deeply connected to a colonial agenda, and does not accurately fit extra-colonial gender conceptions. Through an analysis of extra-colonial language and logic, read together with the flexibility inherent in the processual notion of personhood (on our reading), we argue that binaries do not sit comfortably with extra-colonial African thinking, and as such, processual and normative personhood can be understood in a way that embraces non-binary individuals. Further, the standards for achieving personhood are set by and achieved within the community, so a community which recognises and celebrates non-binary individuals can set up a framework for them to achieve personhood. Accordingly, normative personhood in African thought is found not to exclude those of non-binary gender. This reading saves the normative approach from some of the critiques levelled against it, as well as: i) enhancing consistency in an African world view; ii) strengthening the decolonial agenda; and iii) showing normative personhood to be fairer and more inclusive. [ABSTRACT FROM AUTHOR]

Hybridising Eucalyptus grandis with Eucalyptus nitens produces progeny intended to combine the favourable traits of both parents. E. grandis exhibits good growth, stem form, wood properties and rooting ability for vegetative propagation. E. nitens displays superior cold tolerance, including superior frost and snow tolerance, and high wood density. Eucalypt hybrids developed specifically for improved cold tolerance tend to produce fewer viable hybrid progeny and are more recalcitrant rooters than their sub-tropical counterparts. To overcome these challenges, a novel testing strategy was developed and used to identify promising varieties for commercial deployment. As a result, a large population of E. grandis × E. nitens hybrids was developed through controlled pollinations, propagated via mini-cuttings and established in a total of 21 field trials, across the KwaZulu-Natal and Mpumalanga provinces of South Africa, to investigate growth and adaptability. Data of three growth traits, namely diameter at breast height (DBH), total tree height and volume were analysed to determine the genetic parameters of these traits. Combined-site broad sense heritability for DBH, height and volume were 0.39, 0.46 and 0.35 respectively, indicating a moderate level of genetic control. This, in conjunction with large genetic coefficients of variation (CVg = 20%, 16% and 41% for DBH, height and volume respectively) shows that substantial gains can be made through selection. Combined-site Type B genetic correlations for DBH, height and volume were 0.71, 0.68 and 0.65 respectively, indicating that there was notable genotype by environment interaction. Pairwise comparisons of rBg for volume showed large variation in the correlations of clonal rankings between trials, with rBg ranging from 0.0 to 0.90. [ABSTRACT FROM AUTHOR]

Adolescents living in low- and-middle incomeand middle-income countries are at a particular risk of poor mental health. Caregiver mental health plays a crucial role in a child's emotional and behavioural development and may directly impact a child's risk for future development of mental health problems. Data collected as part of a two-decade longitudinal multiphase research project were used. Participants, originally women in their third trimester of pregnancy (n = 449), were recruited from a peri-urban impoverished community outside of Cape Town, South Africa, and assessed at several time-points over subsequent years. Data collected during the three phases of the research were used to assess the effects of early and current caregiver depression on adolescent internalising and externalising behaviour. Analyses of Covariance models were used to explore the effect of caregiver depression on adolescent internalising and externalising behaviour, while controlling for multiple covariates. We analysed data for 313 adolescent participants and their primary caregivers. Caregiver depression patterns had a significant main effect on externalising behaviour, F(3,305) = 4.10 (p = 0.007), but not on internalising behaviour, F(3,305) = 2.71 (p = 0.09). Post-hoc analysis showed that those adolescents exposed to early and current caregiver depression scored on average 3.83 points (95% CI [0.99; 6.66]) higher in externalising behaviour than those exposed to no caregiver depression. Also, adolescents who experienced a change in caregiver, compared to those whose biological mother were still their primary caregiver, reported significantly higher levels of externalising behaviour F(1,305) = 5.10, p = 0.03. The study findings provide crucial insight into critical periods of risk, as well as opportunities for prevention. Preventive interventions should ideally target caregivers and adolescents to prevent or reduce behavioural problems and disrupt intergenerational cycles of mental disorders or behavioural problems. [ABSTRACT FROM AUTHOR]

Rainfall in the Nama-Karoo is sporadic and a plant's ability to access and utilise available soil moisture will determine its ability to persist in the system and to successfully recruit. When summer rainfall in the Eastern Karoo increases, grassiness increases at the expense of shrub canopy cover. This may drive a transition from shrubland toward grassland. The effect of grass–shrub competition on shrub growth and phenology in the Eastern Karoo is not adequately explained by the root–niche separation hypothesis or the succession hypothesis. In an experiment, we measured shrub growth and phenology in the absence (clipping treatment) and presence (control treatment) of grass over the 2017/2018 rainfall season. Grass clipping changed grass species composition over this period, but grass clipping did not benefit shrubs. We found no competitive effect of grasses on shrubs. However, shrub canopy cover showed a strong linear response to soil moisture, as did canopy cover to temperature. Similarly, soil moisture and temperature were important for stem growth and shrub phenology. Patterns of shrub growth and phenology in response to summer and winter rainfall provide important insight for land managers for optimising production while enabling phenological processes that allow recruitment to take place. [ABSTRACT FROM AUTHOR]

This study aimed to examine first-year students' proactive behaviour towards strengths use (PBSU) and deficit improvement (PBDI), their relationship with students' social support and essential student outcomes (student burnout, student engagement, life satisfaction, satisfaction with studies, study–course fit and intention to drop out). A sample of first-year students (N = 776; 19–20 years = 67%; female = 62%; black = 58%) from a large South African university completed the Strengths Use and Deficit Correction (SUDCO) questionnaire; the Maslach Burnout Inventory–Student Survey (MBI–SS); as well as measures of present social support, engagement, satisfaction with life, person-study-course fit and intention to drop out. Structural equation modelling was used to test the relationships among the variables in the structural model using Mplus 8.6. Overall, this study's findings show that PBSU and PBDI are significantly related, with the exception that support from parents did not predict deficit improvement and PBDI did not predict intention to drop out. The results further show that PBSU was much more strongly related to support from parents, cynicism, life satisfaction, satisfaction with studies, study-course fit and intention to drop out. In contrast, PBDI was much more strongly related to support from significant others, exhaustion and engagement. The results confirm that engaging in proactive behaviour towards strengths use and deficit improvement may result in positive student outcomes. The findings of this study suggest a need for university institutions to implement initiatives to promote social support programmes for students to leverage their strengths, creating learning environments conducive to student success. [ABSTRACT FROM AUTHOR]

Children in low-income communities are at risk for developmental delays and sensory losses. mHealth screening tools enable community health workers to detect developmental delays and sensory losses. This study aims to describe a combined (developmental and sensory – hearing and vision) mHealth-supported screening programme conducted by community healthcare workers with children aged four-six years (n = 63) at early childhood development centres in a low-income community. Early childhood development practitioners (n = 5) assisted with developmental screening. Referral rates were 30% (n = 19) for development, 6% (n = 4) for hearing and 5% (n = 3) for vision. The average screening time for combined screenings was 11.72 min (SD 3.45 min). Post screening questionnaires probing participants' perspectives and experiences of the combined screening were positive. A combined mHealth-supported screening programme conducted by community health workers and early childhood development practitioners appears viable, supporting early detection of developmental delays and sensory losses in children from low-income communities. [ABSTRACT FROM AUTHOR]

Residents living with dementia in residential aged care facilities (RACFs) have reduced access to, and opportunities for, participation in meaningful activities. This leads to increased social isolation and disengagement. Intergenerational programs aim to overcome these issues. Allied health students piloted a live-intergenerational program (LIP), living onsite at a residential aged care facility (RACF) while volunteering for 30 h a month. The purpose of this study was to explore the impact and practicalities for implementing a LIP in an Australian RACF. This qualitative descriptive pilot study was undertaken to explore the diverse perspectives of various stakeholders. Qualitative data were collected during group discussions directed by the nominal group technique with live-in-students. Interviews were conducted with staff members, relatives, facility management and volunteers. All qualitative data were analysed thematically. Two overarching themes emerged. The first, community of care, indicated how care partners and the care context, organisational support and being a live-in-student supported the sustainability of the program. Live-in-students' accessibility promoted opportunities for occupational and social engagement of residents when staff was less available. The second, a collective based on belonging and shared doing, highlighted the program's potential impact and uncovered the development of a collective based on shared belonging. The LIP highlighted the potential for new dimensions to person-centred care. The pilot study demonstrated intergenerational contact within aged residential care supported the evolvement of a collective and promoted a social approach for ageing well. Further research is needed to identify the long-term impact of the LIP and explore the feasibility of expanding the program. [ABSTRACT FROM AUTHOR]

A study was undertaken to determine the sociodemographic variables (SDV) and caregivers' attitudes that impact on healthy eating and the provision of healthy breakfast and school lunchboxes. This was a cross-sectional, descriptive study using self-administered questionnaires. Participating Quintile 5 primary schools in Bloemfontein, South Africa (SA). Caregivers of learners, aged 6–12 years (N = 1 286). To determine associations between sociodemographic variables (SDV) and attitudes towards the provision of healthy breakfast and lunchbox foods. Wilcoxon two-sample test for unpaired data or the chi-square test to compare groups. A p-value of <0.05 indicated statistical significance. Caregivers with higher income and those living with a life partner were more likely to perceive healthy food as being more expensive than less healthy food (p < 0.01 and p < 0.01, respectively) and were of the opinion that preparing lunchboxes increased their workload (p < 0.01 and p < 0.01, respectively). Caregivers with lower income had a less positive attitude towards healthy eating habits (p < 0.01). Caregivers mostly had a positive attitude towards providing healthy breakfast and lunchbox foods. Discrepancies between caregivers' perception of preparation time and cost of healthy food, and the provision of healthy food to learners, were observed. [ABSTRACT FROM AUTHOR]

We argue that the problem of violence persists, to a certain degree, because of our refusal or inability to think about traumatic, difficult or "senseless" material systematically. We explore the connection between thinking and violence, and specifically Arendt's question whether thinking can make men abstain from violence. We are interested in the relationship and tension between knowing and not knowing – as products of thinking – in relation to (also our own capacities for) violence. The tension presents in two main ways. First, thinking is employed to shed light on dark or difficult knowable material, thereby increasing our understanding of ourselves, our place in a troubled society and our relation to violence. Second, thinking bumps up against our ability to know, and it is this unknowability that exposes us to our limits as thinking beings as well as a place of humility and mutual vulnerability. We suggest that paying closer and more nuanced attention to the gender dimensions of the above questions reveals something important about the reasons that gender-based violence persists. We argue, with Arendt, that violence results from non-mastery and that the equation of male power with violence is a lie that violence perpetuates about itself. Similarly, Heberle argues that violence results from the fragile non-cohesiveness of masculine subjectivity and thus also traces the roots of violence to weakness and fragility rather than strength or power. We argue that the antidote for this false mastery and control is thinking. [ABSTRACT FROM AUTHOR]

Despite the burden of anemia among Hodgkin lymphoma (HL) patients, data evaluating red cell concentrate transfusion are limited. We retrospectively studied 285 newly diagnosed HL patients who received first-line adriamycin, bleomycin sulfate, vinblastine sulfate, and dacarbazine (ABVD) treatment at Groote Schuur Hospital, Cape Town. HIV prevalence in the cohort was 39.5% and 74.2% of patients had advanced stage HL. Patient prognosis was scored using the HL International Prognostic Score (IPS-7) and HL IPS-3. Seventy (24.6%) patients were transfused with a median of 2 (IQR 1–5) units per patient. Compared to HIV-negative patients, more HIV-positive patients were transfused (14.1% vs. 40.4%, p <.001) and received more units, median 2 (IQR 1–3) vs. 3 (IQR 2–5), p =.035. HL IPS-7 (OR 2.1, p <.001) and HL IPS-3 (OR 2.6, p <.001) were independently associated with transfusion. HL IPS-7, HL IPS-3, and HIV positivity remained associated with transfusion after adjusting for covariates. For patients with newly diagnosed HL, HL IPS-7, HL IPS-3, and HIV status predicted transfusion. [ABSTRACT FROM AUTHOR]

The unfinished burden of poor maternal and child health contributes to the quadruple burden of disease in South Africa with the direct and indirect effects of the COVID-19 pandemic yet to be fully documented. To investigate the indirect effects of COVID-19 on maternal and child health in different geographical regions and relative wealth quintiles. We estimated the effects of COVID-19 on maternal and child health from April 2020 to June 2021. We estimated this by calculating mean changes across facilities, relative wealth index (RWI) quintiles, geographical areas and provinces. To account for confounding by underlying seasonal or linear trends, we subsequently fitted a segmented fixed effect panel model. A total of 4956 public sector facilities were included in the analysis. Between April and September 2020, full immunisation and first dose of measles declined by 6.99% and 2.44%, respectively. In the follow-up months, measles first dose increased by 4.88% while full immunisation remained negative (−0.65%) especially in poorer quintiles. At facility level, the mean change in incidence and mortality due to pneumonia, diarrhoea and severe acute malnutrition was negative. Change in first antenatal visits, delivery by 15–19-year olds, delivery by C-section and maternal mortality was positive but not significant. COVID-19 disrupted utilisation of child health services. While reduction in child health services at the start of the pandemic was followed by an increase in subsequent months, the recovery was not uniform across different quintiles and geographical areas. This study highlights the disproportionate impact of the pandemic and the need for targeted interventions to improve utilisation of health services. [ABSTRACT FROM AUTHOR]

In emergencies like the COVID-19 pandemic, the reuse or reprocessing of filtering facepiece respirators (FFRs) may be required to mitigate exposure risk. Research gap: Only a few studies evaluated decontamination effectiveness against SARS-CoV-2 that are practical for low-resource settings. This study aimed to determine the effectiveness of a relatively inexpensive ultraviolet germicidal irradiation chamber to decontaminate FFRs contaminated with SARS-CoV-2. A custom-designed UVGI chamber was constructed to determine the ability to decontaminate seven FFR models including N95s, KN95, and FFP2s inoculated with SARS-CoV-2. Vflex was excluded due to design folds/pleats and UVGI shadowing inside the chamber. Structural and functional integrity tolerated by each FFR model on repeated decontamination cycles was assessed. Twenty-seven participants were fit-tested over 30 cycles for each model and passed if the fit factor was ≥100. Of the FFR models included for testing, only the KN95 model failed filtration. The 3M™ 3M 1860 and Halyard™ duckbill 46727 (formerly Kimberly Clark) models performed better on fit testing than other models for both pre-and-post decontaminations. Fewer participants (0.3 and 0.7%, respectively) passed fit testing for Makrite 9500 N95 and Greenline 5200 FFP2 and only two for the KN95 model post decontamination. Fit testing appeared to be more affected by donning & doffing, as some passed with adjustment and repeat fit testing. A ≥ 3 log reduction of SARS-CoV-2 was achieved for worn-in FFRs namely Greenline 5200 FFP2. Conclusion: The study showed that not all FFRs tested could withstand 30 cycles of UVGI decontamination without diminishing filtration efficiency or facial fit. In addition, SARS-CoV-2 log reduction varied across the FFRs, implying that the decontamination efficacy largely depends on the decontamination protocol and selection of FFRs. We demonstrated the effectiveness of a low-cost and scalable decontamination method for SARS-CoV-2 and the effect on fit testing using people instead of manikins. It is recognized that extensive experimental evidence for the reuse of decontaminated FFRs is lacking, and thus this study would be relevant and of interest in crisis-capacity settings, particularly in low-resource facilities. [ABSTRACT FROM AUTHOR]

Numerous research studies have evaluated factors influencing the nature and levels of phenolics and polysaccharides in food matrices. However, in grape and wines most of these works have approach these classes of compounds individually. In recent years, the number of publications interconnecting classes have increased dramatically. The present review relates the last decade's findings on the relationship between phenolics and polysaccharides from grapes, throughout the entire winemaking process up to evaluating the impact of their relationship on the red wine sensory perception. The combination and interconnection of the most recent research studies, from single interactions in model wines to the investigation of the formation of complex macromolecules, brings the perfect story line to relate the relationship between phenolics and polysaccharides from the vineyard to the glass. Grape pectin is highly reactive toward grape and grape derived phenolics. Differences between grape cultivars or changes during grape ripeness will affect the extractability of these compounds into the wines. Therefore, the nature of the grape components will be crucial to understand the subsequent reactions occurring between phenolics and polysaccharide of the corresponding wines. It has been demonstrated that they can form very complex macromolecules which affect wine color, stability and sensory properties. [ABSTRACT FROM AUTHOR]

The COVID-19 pandemic has substantially affected the lives of young people living in sub-Saharan Africa (SSA), leading to poorer short-term mental health outcomes. However, longitudinal data investigating changes in mental health from pre-COVID levels and their predictors are lacking. Our longitudinal sample comprised N = 233 young people (mean age: 17.8 years at baseline, 55.6% female) living in a deprived neighbourhood near Cape Town, South Africa. Symptoms of depression (PHQ-9), anxiety (GAD-7) and alcohol use (AUDIT) were assessed during two waves of data collection, pre-pandemic (2018/19) and via phone interviews in June to October 2020, during South Africa's first COVID wave and subsequent case decline. Latent change score models were used to investigate predictors of changes in mental health. Controlling for baseline levels, we found increases in depression and anxiety but not alcohol use symptoms during the COVID-19 pandemic. Higher baseline symptoms were associated with smaller increases on all measures. Socio-economic deprivation (lack of household income, food insecurity) before and during COVID were associated with higher anxiety and depression symptom increases. Having had more positive experiences during COVID was associated with lower post-COVID onset anxiety and depression increases, and marginally with less alcohol use, while negative experiences (household arguments, worries) were linked to stronger symptom increases. Overall, in a sample of young people from an adverse environment in South Africa, we found increased mental health difficulties during the COVID-19 pandemic, though higher baseline symptoms did not necessarily predict stronger increases. Several factors pre- and post-COVID onset were identified that could be relevant for determining risk and resilience. In the long term, it will be key to address these structural drivers of well-being and to ensure mental health needs of young people are being met to support SSA countries in building back successfully from COVID-19 and preparing for future shock events. [ABSTRACT FROM AUTHOR]

Adolescents exposed to high levels of adversity are vulnerable to developing mental health challenges, with long-lasting adverse consequences. Promoting the psychological well-being of adolescents and protecting them from adverse experiences is crucial for their quality of life. There is a need for evidence on which combinations of protective factors can improve the wellbeing of adolescents to inform future programming efforts. We used data from a longitudinal study that took place in Khayelitsha, South Africa, a semi-urban impoverished community in Cape Town. Data were collected from adolescents when they were 12–14 years of age (n = 333) and again at follow-up when they were aged 16–19 years (n = 314). A path analysis was used to estimate associations between access to service, food security, safe environment, family support, and social support and five outcomes related to adolescent mental health and risky behaviours. The fitted model was used to calculate adjusted mean differences comparing different combinations of risk factors. Two protective factors (food security and safe environment) were positively associated with three outcomes relating to mental health and the absence of risky behaviours. Further investigation revealed that the presence of high food security and safer environments was associated with higher adjusted mean scores: +16.2% (p <.0001) in no substance use; +16.5% (p <.0001) in no internalising behaviour, +19.5% (p <.0001) in self-esteem; +12.2% (p <.0001) in positive peer relationships; and +11.4% (p <.0001) in no suicidal ideation. Interventions targeting adolescents, that aim to improve food security together with improving the safety of their environment, are likely to impact their well-being. [ABSTRACT FROM AUTHOR]

Various guidelines are available to conduct rapid reviews. However, inconsistencies regarding the methodological practices are prevalent. Following a literature review process, the following databases were searched for guidelines on conducting rapid reviews in psychology: Academic Search Complete, CINAHL, Cochrane Database of Systematic Reviews, Directory of Open Access Journals, Health Source: Nursing/Academic Edition, MEDLINE, PsycArticles, PsycInfo, and SocINDEX. Seventeen articles were included and thematically analysed into eight steps: (i) Stating the aim of the rapid review and formulating the research question; (ii) Setting the eligibility criteria and inclusion and exclusion criteria; (iii) Formulating the search strategy; (iv) Screening and selection of literature; (v) Extraction of data from included literature; (vi) Quality and risk of bias assessment of included literature; (vii) Synthesis and analysis of the included literature; and (viii) Stating the limitations of the rapid review. The eight steps serve as the proposed guideline to conduct rapid reviews in psychology research. [ABSTRACT FROM AUTHOR]

The aim of this study was to explore the experiences of early childhood development (ECD) centre staff in providing care and learning support to children living in a high-risk, low socioeconomic community. We interviewed 14 staff from an ECD centre. Interviews were audio-recorded, transcribed verbatim and analysed thematically. We derived four over-arching themes which demonstrated contextual-, parent-, child- and staff-related factors that influenced ECD staff's daily work experiences. Challenges relating to poverty, violence, trauma, and substance exposure cut across each theme. Providing a safe and nurturing learning place for children was essential to staff and allowed them an opportunity to deal with some challenges. Characteristics of staff such as passion, resourcefulness, and commitment, went a long way in providing motivation to overcome challenges. Finding ways to support ECD staff working in low socioeconomic environments are important avenues for further research to prevent staff burnout, and to promote optimal child development. [ABSTRACT FROM AUTHOR]

Digital domestic work platforms have grown in the past few years, enabling employers to source paid domestic work via an app. Few studies have looked at the impact that digital domestic work platforms have on the working conditions and well-being of domestic workers. This study draws on the International Labour Organization's Decent Work framework to explore the extent to which the domestic work platform SweepSouth offers opportunities for decent work. Findings are based on in-depth qualitative interviews with domestic workers employed by SweepSouth. The research revealed that working hours and autonomy were experienced as positive by domestic workers. However, wages remain insufficient to sustain a quality life. Furthermore, the lack of control over work time, an absence of union representation and collective bargaining power, and no social benefits have a negative impact on domestic workers' working conditions. Algorithmic ratings from clients also put extra pressure on domestic workers to render quality cleaning services. Finally, this study shows that domestic work remains unstable and insecure and that digital domestic work platforms do little to improve the lives of domestic workers. [ABSTRACT FROM AUTHOR]

Migrants with dementia living in residential care may be at risk of disengagement. To synthesize research relating to the meaningful engagement of migrants with dementia who are living in residential care. Mixed studies systematic review following PRISMA guidelines. Nine electronic databases were searched for relevant studies. Studies were eligible for inclusion if they reported original research relating to meaningful engagement of migrants with dementia living in residential aged care and were published in English. Two independent reviewers screened the title and abstracts, full texts of eligible studies and conducted a quality appraisal of included texts. A convergent qualitative synthesis approach was used. From 1460 articles, 14 papers representing 12 studies were included. Facilitators of meaningful engagement included: the presence of cultural artefacts in the care environment, the use of multimodal communication and a shared but flexible understanding of residents' culture. Barriers were the absence of a common language and a task-orientated approach to care. Migrants with dementia who are living in residential care are at increased risk of disengagement. Our review highlights the need for culturally congruent residential care to go beyond issues of language and to consider how occupations can be tailored to support ongoing participation and engagement. [ABSTRACT FROM AUTHOR]

Polychaete worms are used widely as bait in South Africa, but common names are not used consistently among fishers or in the literature. This can have implications for conservation, since different polychaete species will not be equally vulnerable to exploitation, and uncertainties about the names of species make it difficult to monitor harvests to assess catch rates. This study develops a consensus view of English and Afrikaans common names for known bait species, building on names already used by fishers and in the literature. The greatest (but not complete) consensus in use of names among fishers and in the literature was for species in the families Arenicolidae, Eunicidae and Nereididae. However, most species are known by multiple common names, some common names are used for multiple species in different families, and the use of at least one name has changed. By applying principles like those used to develop scientific names, we propose a binomial naming system that includes a collective common name that applies to the family or genus, and which, for most species, is already used by fishers, as well as qualifying names that apply to the individual species. The qualifying names may refer to a morphological character that can be observed in the field, its distribution, ecology or the specific name. Research is needed to develop consensus names in isiXhosa. [ABSTRACT FROM AUTHOR]

This study was conducted to determine nutritional knowledge, and to identify whether caregivers' knowledge and attitudes related to their breakfast and lunchbox food-providing practices. A cross-sectional descriptive study was conducted. Questionnaires were used to collect the data. The study population included 1286 caregivers of foundation phase learners in Quintile 5 schools from Bloemfontein, South Africa. The median score for knowledge regarding breakfast and lunchboxes of caregivers was 55.6% and 73.1%, respectively. Knowledge on breakfast and lunchbox foods was higher for caregivers older than 35 years (breakfast median 55.6, p = 0.0479 and lunchbox median 76.9, p < 0.0001) and who possessed a tertiary qualification (breakfast median 55.6, p = 0.0009 and lunchbox median 76.9, p < 0.0001). The attitudes of caregivers were generally positive towards providing healthy breakfast and lunchbox foods (breakfast median 71.4% and lunchbox median 82.5%). The primary objective of caregivers' provision of a lunchbox was health considerations (n = 658, 54.2%) followed by being filling (n = 277, 22.8%). The median score to rate the provision of healthy breakfast foods was 26.7% and 35.6% for lunchbox foods. Healthier breakfasts and lunchboxes were provided by caregivers with a tertiary qualification. A need to educate caregivers on the provision of healthy breakfast and lunchbox foods has been identified. [ABSTRACT FROM AUTHOR]

An integrated approach to Water Sensitive Urban Design and Sustainable Drainage Systems requires community involvement. Mooikloof is a low-density upmarket residential estate with one-hectare properties and large detached houses, but with no stormwater infrastructure, offering a unique case study of uptake of source controls. Using the Theory of Planned Behaviour and an online survey, we examined property owners' current and intended uptake of rainwater harvesting, green roofing, permeable paving and retention ponds, and factors influencing uptake. Owners showed noticeable levels of uptake of certain controls, influenced foremost by positive attitudes and peer pressure with site hydrology also playing a role. Some owners may need assistance to implement certain controls, whereas others may need incentivising or behavioural nudging towards uptake. We conclude with recommendations for further research and the practical implementation of source controls on site or individual residential properties in similar contexts. [ABSTRACT FROM AUTHOR]

Water Sensitive Urban Design (WSUD) presents a process towards the objective of a water-sensitive city. An integrated approach requires community acceptance to implement WSUD at household level. An exploratory comparative survey was conducted amongst 250 households across Cape Town and Pretoria, South Africa, to determine actual uptake of rainwater harvesting, greywater recycling systems and permeable paving, factors affecting uptake, and the perceived effectiveness of assistance to implement WSUD relative to other water demand-side management instruments. Actual uptake of rainwater harvesting and greywater reuse is noticeable amongst water-saving middle-to-high income home owners. Although loglinear analyses suggest that Cape Town's recent drought is unlikely to contribute towards more established levels of uptake, assistance to implement WSUD is nevertheless perceived as the second most effective instrument. Three directions for more systematic research are proposed to better inform the practical implementation of WSUD at household level. [ABSTRACT FROM AUTHOR]

Background: Red beetroot (Beta vulgaris L.) is a multifunctional functional food that reportedly exhibits potent anti-inflammatory, antioxidant, vasodilation, and cellular regulatory properties. This vegetable has gained a fair amount of scientific attention as a possible cost-effective supplement to enhance performance and expedite recovery after physical exercise. To date, no study has investigated the effects of incremental beetroot juice ingestion on the metabolic recovery of athletes after an endurance race. Considering this, as well as the beneficial glucose and insulin regulatory roles of beetroot, this study investigated the effects of beetroot juice supplementation on the metabolic recovery trend of athletes within 48 h after completing a marathon. Methods: By employing an untargeted two-dimensional gas chromatography time-of-flight mass spectrometry approach, serum samples (collected pre-, post-, 24 h post-, and 48 h post-marathon) of 31 marathon athletes that ingested a series (n = 7; 250 ml) of either beetroot juice (n = 15 athletes) or isocaloric placebo (n = 16 athletes) supplements within 48 h post-marathon, were analysed and statistically compared. Results: The metabolic profiles of the beetroot-ingesting cohort recovered to a pre-marathon-related state within 48 h post-marathon, mimicking the metabolic recovery trend observed in the placebo cohort. Since random inter-individual variation was observed immediately post-marathon, only metabolites with large practical significance (p-value ≤0.05 and d-value ≥0.5) within 24 h and 48 h post-marathon were considered representative of the effects of beetroot juice on metabolic recovery. These (n = 4) mainly included carbohydrates (arabitol and xylose) and odd-chain fatty acids (nonanoate and undecanoate). The majority of these were attributed to beetroot content and possible microbial fermentation thereof. Conclusion: Apart from the global metabolic recovery trends of the two opposing cohorts, it appears that beetroot ingestion did not expedite metabolic recovery in athletes within 48 h post-marathon. [ABSTRACT FROM AUTHOR]

Currently, silvicultural prescriptions such as thinning monospecific stands from above and transitioning from monospecific to mixed-species stands are scrutinised regarding their ability to reduce stress and damage. That the quantity and quality of the trees harvested by intermediate and final cuts will vary depending on the chosen prescription is likely but more or less neglected so far. Here we analyse 60 Pinus radiata (D. Don) trees earmarked for removal from the Jonkershoek thinning experiment at the West Cape, South Africa. The experiment comprises both thinning from above and below allowing for comparison of the structure and growth of dominant and subdominant trees removed at 11 years old. Thinning from above removed mainly dominant trees which were on average 44.3% larger in tree diameter, only 8.5% larger in tree height, but 83% larger in crown projection area and more than 25% tapering than subdominant trees extracted by thinning from below. The courses of diameter growth over age of the dominant trees were degressively asymptotic; those of subdominant trees were S-shaped, due to competitive pressure. The volume growth was exponential in both groups. However, the dominant trees achieved 2–3 times higher stem volumes at 10 years of age. Tree structure and growth were highly correlated: the mean annual volume increment showed a Pearson correlation of r = 0.64 with crown length, r = −0.76 with the current ratio of stem slenderness, and r = −0.70 with the competition index by Hegyi. Thus, crown length, slenderness and the competition index were most relevant in explaining tree growth. The analysis of the mode of competition indicated in both groups and in total a sub-proportional increase of stem growth with increasing size. Interestingly, growing space efficiency in terms of mean annual volume growth per crown projection area was similar in both groups. [ABSTRACT FROM AUTHOR]

Gender equality has been found to benefit individual and couple well-being. However, much of what is known about the uptake of gender equality ideas in intimate heterosexual relationships is based on individual data from tertiary educated groups in the global North. South African research has also relied on individual data, but has predominantly utilized low socio-economic status samples. Locally, research is therefore needed that employs dyadic data, and specifically targets higher socio-economic and tertiary educated couples who are more likely to have been exposed to and adopt gender equality ideas. Subsequently, using a feminist social constructionist framework, we explored gender constructions by interviewing 14 heterosexual university student couples about gender ideas and practices in their relationships. We used an inductive thematic analysis method to analyze the dyadic interview data. We found that the couples were aware and supportive of gender equality, and portrayed themselves as having transcended gender inequality. However, we identified restrictive traditional gender constructions which were unseen, or deemed chosen or harmless by the participants. We conclude that more needs to be done to create awareness of, and challenge these unproblematised gender ideas amongst higher socio-economic groups that may believe that they have transcended gender inequality in relationships. [ABSTRACT FROM AUTHOR]

This article reflects on the role of urban planning in climate change adaptation and the role of planning instruments in facilitating the mainstreaming of climate change adaptation. An analytical framework is introduced to analyse primary spatial and integrated planning instruments in the City of Cape Town and Thulamela Local Municipality in South Africa, as comparative cases with core similarities and contextual differences. The findings are discussed in terms of where adaptation should be included throughout the planning process and the extent to which the cases have been able to mainstream climate change adaptation within their planning instruments. The findings show that local municipal plans and policies are recognising the impact of climate change on settlements and the role of planning in responding to these impacts. However, there is little evidence of addressing these long-term impacts through programmatic and coherent approaches using short- to medium-term planning instruments. [ABSTRACT FROM AUTHOR]

In 1935 the Durban Town Council announced a policy that would require all 'Native women' to apply for permission to come to town as part of a system of compulsory registration, which also required proof of legitimate residency for those African women who already lived within municipal boundaries. This article considers how organised African women from the local kholwa (mission-educated Christian) elite asserted themselves as participants in the public sphere of local government. Tensions about the new plans to enforce a system of passes for African women came to a head in 1937 when police conducted raids on homes in the city. In their response, African women's welfare societies organised as part of Daughters of Africa pushed the boundaries of the politics of petitioning through vocal and public protest. I consider the gendered politics of urban segregation through the prism of official, municipal documentation; through reportage in the public forum that constituted Ilanga lase Natal – a newspaper still dominated by men who often expressed ambivalence about 'their' women's presence in town – and also through life history interviews conducted many years later with a key organiser of the protests, Bertha Mkhize. [ABSTRACT FROM AUTHOR]

During its asexual growth, Plasmodium falciparum undergoes a number of 48 h intra-erythrocytic cycles, punctuated by reinvasion events. The biomass formation dynamics can be described by three key parameters: the period of the growth cycle (for P. falciparum, typically 48 h), the merozoite release number (variable between 8 and 32), and the reinvasion efficiency (variable between 20 and 40% in cell cultures). An accurate estimation of these parameters is important to describe growth dynamics, and for evaluating working mechanisms of anti-malaria drugs. Standard techniques for the estimation of merozoite release number and reinvasion efficiency are based on interpretation of microscope images, typically involve fairly low numbers of observations and are laborious. Here, we employ a combined experimental and mathematical modelling approach that is based on metabolic end-product formation and parasitaemia dynamics, to quantify the key parameters for Plasmodium biomass formation in cell cultures in vitro. We present experimental data for Plasmodium falciparum, together with a mechanistic model for the mathematical analysis, and finally an easy-to-use method for a direct analysis of the experimental data. The results are in agreement with previously published results, but – importantly – are average values for all cells in the culture, i.e. based on a large number of cells, and are reproducible between independent experiments. [ABSTRACT FROM AUTHOR]

Raised blood pressure, with the renin-angiotensin system (RAS) as a central regulatory component, is one of the most important contributors to early development of left ventricular hypertrophy. Factors such as increased age, sex, black ethnicity and a low socio-economic status also contribute to left ventricular remodelling. To better understand early contributors to left ventricular mass, we investigated the relationship between left ventricular mass index (LVMi) and the components of the RAS in young healthy adults while considering ethnicity, sex and socio-economic status. Black and white women and men (N = 1186) between the ages of 20–30 years were included. By using standard echocardiography, we determined LVMi. Ultra-pressure-liquid chromatography tandem-mass spectrometry (LC-MS/MS) was used to measure the RAS-fingerprint®. Components of the RAS such as plasma renin activity (PRA-S), angiotensin I (Ang I), angiotensin II (Ang II) and aldosterone were suppressed in the black compared to the white group (all p < 0.001). No associations between LVMi and the RAS were evident in the total, black or white groups. With additional grouping according to sex and socio-economic status, inverse associations between LVMi and PRA-S (β= −0.168; p = 0.017), Ang I (β= −0.155; p = 0.028) and Ang II (β= −0.172; p = 0.015) were found only in low socio-economic black women. Despite a suppressed RAS in the black compared to the white group, components of the RAS were not associated with LVMi in this young cohort. The low socio-economic black women of this study population may be vulnerable to future RAS-related increases in left ventricular mass. [ABSTRACT FROM AUTHOR]

Carbon stocks estimated for greenhouse gas emission reporting in South African plantation forests require improvement for local relevance. We developed biomass expansion and conversion factor (BECF) models to convert enumeration data to above-ground biomass (AGB) for major genera. Local biomass data and allometric models were aggregated across major taxa and scaled to utilisable stem and non-utilisable (bark, branch, foliar) biomass on 1 735 permanent sample plots. Models were developed for each genus to estimate BECF from utilisable volume to overcome bracket stepping in the Intergovernmental Panel on Climate Change (IPCC) lookup tables. To enable more accurate biomass estimates for growers who record tree volume and bone-dry wood density, an alternative calculation was developed that capitalises on stem-wood comprising 70% to 90% of AGB at rotation age. AGB is the sum of utilisable stem and non-utilisable components. Stem mass can be calculated as the product of volume and wood density. Models to estimate non-utilisable biomass from utilisable volume were developed for each genus. Local models estimated lower hardwood biomass and marginally lower softwood biomass than IPCC estimates. Use of local estimates compared to default values result in lower carbon stock estimates and reduced fluxes using the stock change method. Developing further allometric models and BECFs at the species or hybrid level will have little value due to rapidly changing genetic deployment and current work has indicated non-significant differences between genotypes within each genus. Further work should focus on improved tree volume and wood density estimates as well as on below-ground biomass estimates. [ABSTRACT FROM AUTHOR]

Rainfall and stocking densities are key drivers of vegetation functioning and productivity in semi-arid regions. Below-average rainfall is of particular importance in the agricultural sector as it limits fodder availability for livestock in the short term, and can influence potential agricultural productivity through inducing the mortality of palatable perennial plant species in the long term. Changes in rainfall trends are not equal for all regions and must be quantified locally to sustainably manage natural grazing resources. The Upper Karoo has experienced considerable fluctuations in rainfall for many thousands of years, with relatively wetter and drier phases. This study analysed farm records from the past eight decades at eight sites in the Upper Karoo. The aim was to provide detailed and comparable descriptions to generate a more general understanding of rainfall at a spatial scale over this entire bioregion and to assess recent farming conditions within a historical rainfall context. A steadily increasing trend in rainfall of approximately 10 mm per decade has been observed in the Upper Karoo over the past eight decades, and the 30-year period from 1989 to 2018 was generally characterised by above-average rainfall. Presently, the farming conditions are more favourable compared to historical rainfall recorded before the year 1989. [ABSTRACT FROM AUTHOR]

The virtual has become the latest rostrum for ideological heteronormativity; it increasingly plays host to an insidious rhetoric of unjustifiably fixed and oppositional gender binaries that exhort heterosexuality as a norm. Conservative political and religious groups, as well as consumerist advertising, utilise digital technology to reinforce cast-in-stone and adversarial social perspectives for manipulative and exploitative ends. Contrastingly, the virtual may be mobilised to support and facilitate queering in contemporary societies and may positively counter such fixed ideological heteronormative categories of social life. Crucial in this transformative account of the virtual is the body, which is for Merleau-Ponty the horizon of engagement with the world as a condition for perception and performativity. Queer perspectives may, in turn, overcome the oversight of Merleau-Ponty (as critically suggested by Judith Butler and Iris Marion Young) regarding the specific gendered characteristics of the body itself, and allows for an expanded embodied and queer conceptualisation of the virtual. A transformative vision of the virtual entails therefore a rethinking of our understanding of digital technology through (a) the phenomenology of the body-subject and (b) queer theory. I argue that the idea of the body as entirely discursive or performative (per queer theory) needs to be adjusted by explicating the foundational ontological characteristics of the body-subject's encounter of the virtual. [ABSTRACT FROM AUTHOR]

In a practice-led study, the authors explored the process followed by classical pianists when learning new repertoire at an advanced level. The study drew on accounts by professional pianists and pedagogues, as well as on case studies of the learning process in musicians. Further, the study drew on literature about practice and memorisation. It incorporated the second author's own documented process of learning Claude Debussy's L'Isle joyeuse. Audio recordings and journal entries from each practice session during his learning process were transcribed and a description of the learning process is presented. The process was divided into four stages, namely, initial learning, first revision, second revision (memorisation), and polishing. The results are discussed and compared with the literature. The study found that an efficient learning process reflects the late Swedish psychologist K. Anders Ericsson's principles of deliberate practice and acquisition of long-term working memory. It further found that practice strategies which introduce contextual interference into the process could be beneficial, as could concentrated, musical slow practice. Other beneficial techniques include mental practice in order to strengthen memorisation. [ABSTRACT FROM AUTHOR]

The article discusses the Fairwork project in South Africa, in which lawyers and social scientists work to create labour standards for digital platform workers. Also cited are the proposed public ranking system to enhance the working conditions of said workers, the growing popularity of gig economy, and the employment rights of said employees like fair pay, fair contract, and fair management.

Technology as a school subject has extensive entrepreneurship potential, especially when combined with the practical production aspects that form part of the intended curriculum. The South African Senior Phase Technology curriculum is silent on the topic of entrepreneurship and as a result, this potential is not reaching learners in a country with high levels of youth unemployment. This paper endeavours to address recommendations made in previous research, that entrepreneurship education should be developed as part of the South African Senior Phase Technology curriculum. Utilising the design process—described in the curriculum as the backbone for Technology methodology—as a point of departure, the current study aimed to develop proposals for the unpacking and scaffolding of entrepreneurship education in Technology, without deviating too far from the structure and content of the existing intended curriculum. Systematic qualitative document analysis and a consumer-based approach were used to align proposed entrepreneurship education with the curriculum definition and the original intentions of Technology education, which were to contribute to reducing unemployment in South Africa. The proposed structure and content for including entrepreneurship education in Senior Phase Technology will be presented to the Department of Basic Education for their consideration in subsequent curriculum modifications. [ABSTRACT FROM AUTHOR]

Entrepreneurship is valued for its economic and social benefits, but also to cultivate the characteristics required by learners to deal with the demands of the twenty-first century. Entrepreneurship education develops learners' entrepreneurship knowledge, skills, characteristics, and mindsets. Several serious economic and social dilemmas (including high youth unemployment) occur in South Africa, and entrepreneurship education could contribute to addressing these dilemmas. Previous research revealed that entrepreneurship education appears infrequently and in isolated subjects in the South African school curriculum. These entrepreneurship education shortcomings in the South African school curriculum therefore needed to be investigated in an effort to revisit the curriculum to present learners with more opportunities to benefit from effectual entrepreneurship education. To support this quest, a literature review grounded in a constructivist approach to determine international best practice was used to explore how entrepreneurship education is being approached globally. The set of best practices was analysed and compared to current entrepreneurship education in South Africa, using curriculum document analysis, which revealed several areas for improvement of entrepreneurship education in this school curriculum. These insights were used to develop a set of guidelines that could be used to address the entrepreneurship education inadequacies in the current South African school curriculum, thereby contributing to the improvement of South African learners' entrepreneurship education. An advantageous ripple effect could be expected for South Africa if learners utilise their entrepreneurship education to address the economic and social dilemmas that the country has to deal with. [ABSTRACT FROM AUTHOR]