Faculty of Natural Sciences: Recent submissions
Now showing items 1081-1100 of 2642
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Oxazinethione derivatives as a precursor to pyrazolone and pyrimidine derivatives: Synthesis, biological activities, molecular modeling, adme, and molecular dynamics studies
(MDPI, 2021)In this study, we used oxazinethione as a perfect precursor to synthesize new pyrimidine and pyrazole derivatives with potent biological activities. Biological activities were determined for all compounds against A. flavus, ... -
Opportunities for improving recognition of coastal wetlands in global ecosystem assessment frameworks
(Elsevier, 2021)Vegetated coastal wetlands, including seagrass, saltmarsh and mangroves, are threatened globally, yet the need to avert these losses is poorly recognized in international policy, such as in the Convention on Biological ... -
Chemical composition and cosmeceutical potential of the essential oil of oncosiphon suffruticosum (L.) Källersjö
(MDPI, 2021)The South African medicinal plant Oncosiphon suffruticosum (L.) Källersjö is an important remedy used to treat chronic, respiratory, and skin ailments. From the essential oil (EO) extracted by the hydrodistillation, ... -
A new modified spatial approach for monitoring non-perennial river water availability using remote sensing in the Tankwa Karoo, Western Cape, South Africa
(AJOL, 2021)Non-perennial rivers (N-PRs) make up two thirds of all rivers in South Africa, yet many are ungauged. Traditionally, it has been assumed that when a flow is recorded, there is water throughout that river. These assumptions ... -
Medicinal properties and in vitro biological activities of selected helichrysum species from South Africa: A review
(MDPI, 2021)The genus Helichrysum Mill comprises hundreds of species that are mostly flowering perennial shrubs. Some of these plants that belong to the Helichrysum species are used in traditional medicine to treat cough, back pain, ... -
Spectroscopy of states in Ba 136 using the Ba 138 (p,t) reaction
(American Physical Society, 2021)Background: The Ba136 isotope is the daughter nucleus in Xe136ββ decay. It also lies in a shape transitional region of the nuclear chart, making it a suitable candidate to test a variety of nuclear models. Purpose: To ... -
Green synthesis of metallic nanoparticles using some selected medicinal plants from Southern Africa and their biological applications
(MPDI, 2021)The application of metallic nanoparticles (MNPs), especially that of silver, gold, cobalt, and zinc as antimicrobial, anticancer, drug delivery, contrast, and bioimaging agents has transformed the field of medicine. Their ... -
The origin of the dust extinction curve in milky way-like galaxies
(Oxford University Press, 2021)We develop a cosmological model for the evolution of dust grains in galaxies with a distribution of sizes in order to understand the origin of the Milky Way dust extinction curve. Our model considers the formation of active ... -
Austral winter marine epilithic diatoms: Community composition and distribution on intertidal rocky substrate around the coast of South Africa
(Elsevier, 2020)The knowledge on the composition and spatial distribution of marine benthic diatoms around the coast of South Africa remains limited. Epilithic diatom assemblages from natural intertidal rocky substrate and physico-chemical ... -
Climatic and topographic changes since the Miocene influenced the diversification and biogeography of the tent tortoise (Psammobates tentorius) species complex in Southern Africa
(BMC, 2020)Background: Climatic and topographic changes function as key drivers in shaping genetic structure and cladogenic radiation in many organisms. Southern Africa has an exceptionally diverse tortoise fauna, harbouring one-third ... -
Codon-based analysis of selection pressure and genetic structure in the Psammobates tentorius (Bell, 1828) species complex, and phylogeny inferred from both codons and amino acid sequences
(John Wiley & Sons, 2021)This study used codon analysis (dN/dS and Tv/Ti) to investigate selection pressure and genetic structure in the highly polymorphic Psammobates tentorius species complex, and amino acid sequences to construct a phylogeny ... -
A novel approach to quantify metrics of upwelling intensity, frequency, and duration
(Public Library of Science, 2021)The importance of coastal upwelling systems is widely recognized. However, several aspects of the current and future behaviors of these systems remain uncertain. Fluctuations in temperature because of anthropogenic climate ... -
Crystal structure of saposin B reveals a dimeric shell for lipid binding
(National Academy of Sciences, 2003)Saposin B is a small, nonenzymatic glycosphingolipid activator protein required for the breakdown of cerebroside sulfates (sulfatides) within the lysosome. The protein can extract target lipids from membranes, forming ... -
Exogenous antioxidants enhance seedling growth and yield of artificially aged cabbage and lettuce seeds
(MPDI, 2021)Aged seeds exhibit compromised vigour in terms of germination, seedling emergence and growth, but this can to some extent be alleviated by invigoration treatments before sowing. This study aimed to investigate ageing ... -
Specialized morphology, not relatively large head size, facilitates competition between a small-bodied specialist and large-bodied generalist competitors
(Journal of Zoology, 2021)Interspecific competition for limited resources should theoretically occur between species that are morphologically similar to each other. Consequently, species that reduce competition by adapting to specialize on a specific ... -
Service learning in pharmacy: Implementation of tuberculosisscreening by second-year pharmacy studentsin primary health care facilitiesin Cape Town, South Africa
(FIP, 2021)The School of Pharmacy of the University of the Western Cape implemented a service learning programme where second year students participated in tuberculosis (TB) screening.To determine the views of students and nurses about ... -
HELP: The Herschel Extragalactic Legacy Project
(Oxford University Press, 2021)We present the Herschel Extragalactic Legacy Project (HELP). This project collates, curates, homogenizes and creates derived data products for most of the premium multiwavelength extragalactic data sets. The sky boundaries ... -
Structural Insights and Docking Analysis of Adamantane-Linked 1,2,4-Triazole Derivatives as Potential 11 -HSD1 Inhibitors
(Molecules, 2021)The solid-state structural analysis and docking studies of three adamantane-linked 1,2,4- triazole derivatives are presented. Crystal structure analyses revealed that compound 2 crystallizes in the triclinic P-1 space ... -
The effects of detergent and fertilizer toxicity on growth rate, nutrient utilization and survival of Clarias gariepinus (Burchell) fingerlings reared under controlled condition
(International Journal of Fisheries and Aquatic Studies, 2020)Study on the effects of metals on growth rate and survival of Clarias gariepinus (Burchell 1822) fingerlings bred in tanks containing water concentrated with inorganic fertilizer and detergent was conducted. 300 fingerlings ... -
Sampling bias in reptile occurrence data for the Kruger National Park
(AOSIS, 2020)To effectively conserve and manage species, it is important to (1) understand how they are spatially distributed across the globe at both broad and fine spatial resolutions and (2) elucidate the determinants of these ...