Faculty of Natural Sciences: Recent submissions
Now showing items 1181-1200 of 2642
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The validity and reliability of computer-aided semen analyzers in performing semen analysis: a systematic review
(Translational Andrology and Urology., 2021)Background: Computer-aided sperm analyzers (CASA) are currently used worldwide for semen analysis. However, there are doubts about their reliability to fully substitute the human operator. Therefore, this study aimed to ... -
The impact of COVID-19 on the male reproductive tract and fertility: A systematic review
(Informa UK Limited, trading as Taylor & FrancisGroup., 2021)Objective: The COVID-19 pandemic, caused by the acute respiratory syndrome-coronavirus 2 (SARS-CoV-2), remains an ongoing public health challenge. Although males are affected slightly more than females, the impact of ... -
A comparison between the anthropological and modern day uses of this indigenous herb
(Conference: SA Medical Research Council 6th Annual Research Conference, 2012)Sceletium tortuosum (Fig. 1) is a scrambling succulent ground cover indigenous to the Western and Eastern Cape. It has probably been used for centuries as a mood-altering drug, especially by the Khoisan hunters and Nama ... -
The Impact of Storage Time and Seasonal Harvesting on Levels of Sutherlandins and Sutherlandiosides in Lessertia frutescens
(Conference: Faculty of Community and Health Sciences 2nd Research Day, 2013)In South Africa, an estimate of 70% of the population frequently uses traditional medicine for their health care needs. The use of Lessertia frutescens (Figure 1,2) by various cultural groups dates back to the earlier ... -
The Use of Probiotics in the Primary Prevention of Atopic Dermatitis: A Systemic Review of the Literature in Light of the Hygiene Hypothesis
(8th Conference of the Federation of African Immunological Societies, 2012)Atopic dermatitis (eczema) is a type 1 hypersensitivity reaction that is common in infants and young children, with incidence increasing in the Industrialised world. Based on epidemiological evidence, the hygiene hypothesis ... -
A CHANDRA STUDY OF TEMPERATURE SUBSTRUCTURES IN INTERMEDIATE-REDSHIFT GALAXY CLUSTERS
(2009)By analyzing the gas temperature maps created from the Chandra archive data, we reveal the prevailing existence of temperature substructures on ∼ 100 h −1 70 kpc scales in the central regions of nine intermediate-redshift ... -
Alternative medicine and herbal remedies in the treatment of erectile dysfunction: A systematic review
(Informa UK Limited, trading as Taylor & Francis Group., 2021)Objectives: To systematically review and discuss the current evidence from placebo-controlled clinical trials that investigated the use of alternative medicines and herbal remedies in the management of erectile dysfunction ... -
A New Model For Including Galactic Winds in Simulations of Galaxy Formation II: Implementation of PhEW in Cosmological Simulations
(Monthly Notices of the Royal Astronomical Society, 2021)Although galactic winds play a critical role in regulating galaxy formation, hydrodynamic cosmological simulations do not resolve the scales that govern the interaction between winds and the ambient circumgalactic medium ... -
An orientation bias in observations of submillimetre galaxies
(Monthly Notices of the Royal Astronomical Society, 2021)Recent high-resolution interferometric images of submillimetre galaxies (SMGs) reveal fascinatingly complex morphologies. This raises a number of questions: how does the relative orientation of a galaxy affect its observed ... -
Chemical Vapor Deposited Mixed Metal Halide Perovskite Thin Films
(Materials, 2021)In this article, we used a two-step chemical vapor deposition (CVD) method to synthesize methylammonium lead-tin triiodide perovskite films, MAPb1−xSnxI3, with x varying from 0 to 1. We successfully controlled the concentration ... -
A Global Survey of Reproductive Specialists to Determine the Clinical Utility of Oxidative Stress Testing and Antioxidant Use in Male Infertility
(The world journal of men's health, 2021)Globally, infertility impacts 15% of couples trying to conceive. The incidence of male infertility has been increasing over the past several decades, ranging from 20% to 70% worldwide [1,2]. The male partner is found to ... -
Combined analysis of the low-energy enhancement of the gamma-strength function and the giant dipole resonance
(Springer, 2019)The nuclear dipole polarizability is mainly governed by the dynamics of the giant dipole resonance and has been investigated along with the effects of the low-energy enhancement of the photon strength function for nuclides ... -
HI intensity mapping with the MIGHTEE survey: power spectrum estimates
(Monthly Notices of the Royal Astronomical Society, 2021)Intensity mapping (IM) with neutral hydrogen is a promising avenue to probe the large scale structure of the Universe. In this paper, we demonstrate that using the 64-dish MeerKAT radio telescope as a connected interferometer, ... -
Women's education and health inequalities in under-five mortality in selected sub-Saharan African countries, 1990–2015
(PLOS, 2016)The aim of the study was to analyse trends in the relationship between mother’s educational level and mortality of children under the year of five in Sub-Saharan Africa, from 1990 to 2015.Data used in this study came ... -
Risk factors of inconsistent condom use among sexually active youths: Implications for human immunodeficiency virus and sexual risk behaviours in Malawi
(SAGE, 2017)This study examines the risk associated with inconsistent use of condoms as a risk factor for human immunodeficiency virus/sexually transmitted infections (HIV/STIs) and sexual risk behaviours. The Malawi Demographic ... -
Towards an ethnography of climate change variability: Perceptions and coping mechanisms of women and men from Lambani village, Limpopo province
(SAGE, 2017)Attention to gender and equity has lagged behind in climate change research, programming, national policy-making and in the international negotiations. Studies on climate change and gender links with climate change ... -
Factors influencing sustainability of communally-managed waterfacilities in rural areas of Zimbabwe
(Elsevier, 2017)Sustainability of point water facilities is a major development challenge in many rural settings ofdeveloping countries not sparing those in the Sub-Saharan Africa region. This study was done inZimbabwe to investigate the ... -
Antibacterial Activities of Selected Green Seaweeds from West African Coast
(EC Pharmacology and Toxicology ECronicon Open Access, 2020)The continually increasing antibiotic resistance amongst microorganisms had steered up an increased intensity in the search for new drugs. The marine environment had been reported to be a great source of novel compounds ... -
Using a simulation software to perform energy and exergy analyses of the sulfur-iodine thermochemical process
(World Scientific Publishing, 2017)The objective of this work is to demonstrate the utilization of the power of simulation tools to perform an exergy analysis of a process. Exergy analysis, being a new and useful thermodynamics tool, will be applied to one ... -
Water futures and solutions: Options to enhance water security in sub-Saharan Africa
(Springer, Cham, 2018)Water security is one of the greatest health, ecological, environmental, and human rights challenges of our time. Africa sits at the epicenter of this quandary, with the need to build resilience into already over allocated ...