Faculty of Natural Sciences: Recent submissions
Now showing items 1341-1360 of 2642
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Trace elements risk assessment for consumption of wild mussels along South Africa coastline
(Elsevier, 2021)The study aimed to contribute to the scarce data on concentrations in the soft tissue of wild mussels growing in coastal cities of South Africa. The intake of 26 micro and macroelements was estimated. The mass fractions ... -
Quasi-uniform structures determined by closure operators
(Elsevier, 2021)We demonstrate a one-to-one correspondence between idempotent closure operators and the so-called saturated quasi-uniform structures on a category C. Not only this result allows to obtain a categorical counterpart P of the ... -
Provenance of metasedimentary rocks of the western Dom Feliciano Belt in Uruguay: Insights from U–Pb detrital zircon geochronology, Hf and Nd model ages, and geochemical data
(Elsevier, 2021)New isotopic and geochemical data for the Paleo- Meso- and Neoproterozoic metasedimentary cover of the southern Dom Feliciano Belt (Brasiliano/Pan-African) are presented and evaluated combined with published information. ... -
Tropospheric modeling of acetic acid in the UK for summer, winter and spring seasons using a mesoscale 3-dimensional chemistry and transport model, WRF-Chem-CRI
(Elsevier, 2021)The measurement of acetic acid during the ClearfLo campaign for Winter 2012 and Summer 2012 in London and at the Weybourne Research Station (East Anglia), UK for Spring 2013 gives the average ± 1σ mixing ratios of 45.9 ± ... -
Dating detrital zircon from the gold-bearing Ventersdorp contact reef in the Ventersdorp supergroup of South Africa
(Elsevier, 2021)The Ventersdorp Contact Reef (VCR) at the base of the >4.5 km-thick volcanosedimentary Ventersdorp Supergroup unconformably overlies the Witwatersrand Supergroup and is the second youngest mineable reef in the Witwatersrand ... -
Chitosan/PEO nanofibers electrospun on metallized track-etched membranes: fabrication and characterization
(Elsevier, 2021)The development of next-generation adsorption, separation, and filtration materials is growing with an increased research focus on polymer composites. In this study, a novel blend of chitosan (CS) and polyethylene oxide ... -
Modelling water utilization patterns in apple orchards with varying canopy sizes and different growth stages in semi-arid environments
(Elsevier, 2021)Accurate estimates of orchard evapotranspiration (ET) and its components are important for precise irrigation scheduling, irrigation system designs, and optimal on-farm water allocation particularly in water-limited ... -
MACRODONTIA: A brief overview and a case report of KBG syndrome
(Elsevier, 2021)Macrodontia is a dental condition where a tooth or group of teeth are abnormally larger than average. Functional and aesthetic discrepancies may arise in affected individuals resulting in lowering the quality of life. It ... -
Herbicides in Camps Bay (Cape Town, South Africa), supplemented
(Elsevier, 2021)During 2017 the herbicides alachlor, atrazine, butachlor, metolachlor, and simazine were detected in water samples, beach sediments and marine biota collected at Camps Bay, Cape Town, South Africa. During that period, the ... -
An unconditionally stable nonstandard finite difference method to solve a mathematical model describing Visceral Leishmaniasis
(Elsevier, 2021)In this paper, a mathematical model of Visceral Leishmaniasis is considered. The model incorporates three populations, the human, the reservoir and the vector host populations. A detailed analysis of the model is presented. ... -
Integration of hydrogeophysical and geological investigations in enhancing groundwater potential assessment in Houtriver gneiss crystalline basement formation of South Africa
(Elsevier, 2021)Groundwater exploration in crystalline basement aquifers such as the Houtriver gneiss formation in the Limpopo province of South Africa is often described as complex. This is because groundwater availability in such aquifers ... -
A new auroral phenomenon, the anti-black aurora
(Nature, 2021)Black auroras are small-scale features embedded in the diffuse background aurora, typically occurring post-substorm after magnetic midnight and with an eastward drift imposed. Black auroras show a significant reduction in ... -
A qualitative meta-synthesis of facilitators and barriers to tuberculosis diagnosis and treatment in Nigeria
(Springer Nature, 2021): Despite progress in tuberculosis (TB) control globally, TB continues to be a leading cause of death from infectious diseases, claiming 1.2 million lives in 2018; 214,000 of these deaths were due to drug resistant strains. ... -
Reflecting on the current scenario and forecasting the future demand for medical doctors in South Africa up to 2030: towards equal representation of women
(Springer Nature, 2021)Increasing feminization of medical professions is well-acknowledged. However, this does not always equate to equitable representation of women within medicine, regarding their socio-demographic indicators, regions, sectors ... -
Access to chronic medicines: patients’ preferences for a last kilometre medicine delivery service in Cape Town, South Africa
(Springer Nature, 2021): Chronic patients are required to access their chronic medicines on a regular basis, often only to refill their repeat prescriptions. Adherence to chronic medicines is challenging and has stimulated health care providers to ... -
A robust numerical solution to a time-fractional Black–Scholes equation
(Springer Nature, 2021)Dividend paying European stock options are modeled using a time-fractional Black–Scholes (tfBS) partial differential equation (PDE). The underlying fractional stochastic dynamics explored in this work are appropriate for ... -
Evaluating pharmacy students’ knowledge and skills in reproductive, maternal, new-born and child health care at a South African university
(Springer Nature, 2021)Maternal and child mortality is a global concern and one of South Africa’s quadruple burdens of disease. As easily accessible frontline healthcare workers, pharmacists play an important role in the continuum of maternal ... -
Establishment of the African Medicines Agency: Progress, challenges and regulatory readiness
(Springer Nature, 2021)Insufcient access to quality, safe, efcacious and afordable medical products in Africa has posed a signifcant challenge to public health for decades. In part, this is attributed to weak or absent policies and regulatory ... -
Tracking research trends and hotspots in sperm DNA fragmentation testing for the evaluation of male infertility: a scientometric analysis
(Reproductive Biology and Endocrinology, 2019)Background: This article describes the research trends in sperm DNA fragmentation (SDF) over the past 20 years (1999–2018) using a scientometric approach. Methods: A stepwise approach was adopted to retrieve scientometric ... -
Nanotechnology advances towards development of targeted-treatment for obesity
(Journal of Nanobiotechnology, 2019)Obesity through its association with type 2 diabetes (T2D), cancer and cardiovascular diseases (CVDs), poses a serious health threat, as these diseases contribute to high mortality rates. Pharmacotherapy alone or in ...