Browsing Faculty of Natural Sciences by Title
Now showing items 2144-2163 of 2571
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SignSupport: a limited communication domain mobile aid for a Deaf patient at the pharmacy
(Telkom, 2013)This paper discusses a prototype for a communication aid on a mobile phone to support a Deaf1 person visiting a public hospital pharmacy. The aim is to prevent problems of non-compliance to treatment due to poor communication ... -
Silver nanoparticles stimulates spermatogenesis impairments and hematological alterations in testis and epididymis of Male rats
(MDPI, 2020)The potential pharmaceutical application of nanoparticles has led to the toxicity within the male reproductive system. In the present study, the effects of silver nanoparticles (Ag-NPs) on hematological parameters, free ... -
Silver/carbon codoped titanium dioxide photocatalyst for improved dye degradation under visible light
(Hindawi Publishing Corporation, 2017)Herein, we report the synthesis of quartz supported TiO2 photocatalysts codoped with carbon and silver through the hydrolysis of titanium tetrachloride followed by calcination at 500°C. The prepared samples were characterized ... -
Silver–zinc oxide nanocomposite antiseptic from the extract of Bidens pilosa
(Springer, 2019)Silver nanoparticles (Ag-NPs), zinc oxide (ZnO-NPs) and zinc oxide–silver (ZnO–Ag-NPs) were biosynthesized based on the rich matrix of alkaloids, flavones, tannins capping/stabilizing agents present in Bidens pilosa ... -
SIMBA: the average properties of the circumgalactic medium of 2 ≤ z ≤ 3 quasars are determined primarily by stellar feedback
(Oxford University Press, 2020-10-05)We use the SIMBA cosmological hydrodynamic simulation suite to explore the impact of feedback on the circumgalactic medium (CGM) and intergalactic medium (IGM) around 2 ≤ z ≤ 3 quasars. We identify quasars in SIMBA as the ... -
A simple point of care test can indicate the need for periodontal therapy to reduce the risk for adverse pregnancy outcomes in mothers attending antenatal clinics
(Taylor & Francis Group, 2017)INTRODUCTION: Although the association between periodontal disease (PD) and adverse pregnancy outcomes has gained recognition amongst antenatal healthcare workers, not much has changed in practice to address it. This ... -
A simple, high-throughput modeling approach reveals insights into the mechanism of gametophytic self-incompatibility
(Nature Research, 2016)Specificity in the GSI response results from the S-haplotype-specific molecular interaction of S-locus F-box (SLF/SFB) and SRNase proteins in the self-incompatibility locus (S-locus). The answer to the question of how ... -
Simulating a full-sky high resolution Galactic synchrotron spectral index map using neural networks
(Monthly Notices of the Royal Astronomical Society, 2023)We present a model for the full-sky diffuse Galactic synchrotron spectral index with an appropriate level of spatial structure for a resolution of 56 arcmin (to match the resolution of the Haslam 408 MHz data). Observational ... -
Simulation of Y-chromosomal haplotype data
(Elsevier, 2010)The non-recombining nature of the Y-chromosome determines the non-independence of alleles between loci. The evolution of short tandem repeat (STR) loci in the Y-chromosome is the result of different factors such as ... -
Simulations of primary beam effects on the cosmic bispectrum phase observed with the Hydrogen Epoch of Reionization Array
(Royal Astronomical Society, 2022)The 21 cm transition from neutral hydrogen promises to be the best observational probe of the epoch of reionization (EoR). The main difficulty in measuring the 21 cm signal is the presence of bright foregrounds that require ... -
Simultaneous brewery wastewater treatment and hydrogen generation via hydrolysis using Mg waste scraps
(Journal of Cleaner Production, 2020)An advanced, eco-efficient “waste plus waste to hydrogen” method was developed for hydrogen generation and the simultaneous treatment of two types of waste generated from magnesium and brewerybased industries via hydrolysis. ... -
Single nucleotide polymorphisms associated with metformin and sulphonylureas’ glycaemic response among South African adults with type 2 diabetes mellitus
(MDPI, 2021)To examine the association of polymorphisms belonging to SLC22A1, SP1, PRPF31, NBEA, SCNN1B, CPA6 and CAPN10 genes with glycaemic response to metformin and sulphonylureas (SU) combination therapy among South African adults ... -
Single nucleotide polymorphisms in amlodipine-associated genes and their correlation with blood pressure control among South African adults with hypertension
(MDPI, 2022)This study describes the single nucleotide polymorphisms (SNPs) in amlodipineassociated genes and assesses their correlation with blood pressure control among South African adults with hypertension. Methods: In total, ... -
SIP presence location service
(Telkom, 2005)This paper presents an innovative use of the Session Initiation Protocol (SIP) for the subscription and notification of geographic information in order to provide a privacy concerned location-based service. SIP is a signaling ... -
Siphonophores from surface waters of the Colombian Pacific Ocean
(Cambridge University Press, 2018)Siphonophores are colonial hydrozoans that feed on zooplankton including fish larvae, and occur throughout the world’s oceans from surface waters to ocean depths. Here we describe the composition of hyponeustonic siphonophores ... -
A "site" for sore eyes
(South African Academy of Family Physicians, 2018)It is known that not all red eyes are caused by infections. Furthermore, not all eye infections will react to antibiotic eye drops. Most cases of conjunctivitis are due to viral causes, do not require antibiotic eye drops ... -
Situation analysis on the regulation of nanomedicines in Southern Africa
(Frontiers Media, 2023)Medical products incorporating nanoparticle drug delivery systems (nanomedicines) are therapeutic or imaging agents, which comprise a delivery system within the nanometer size range (1 – 1000 nm). As medical products, ... -
Situation-aware routing based on link quality for static mesh networks with mobile nodes
(Telkom, 2011)Situation-aware routing seeks to improve quality of service on hybrid wireless mesh networks by making routing decisions based on the current situation of the network. BATMAN-adv is a mesh routing protocol that counts ... -
Situation-aware routing for wireless mesh networks with mobile nodes
(IIMC International Information Management Corporation, 2012)This paper describes a situation-aware algorithm based on the current situation of a mesh network with mobile nodes that improves quality of service. After running laboratory performance tests, we concluded that a ... -
The sixth edition of the WHO manual for human semen analysis: A critical review and SWOT analysis
(MDPI, 2021)Semen analysis is the cornerstone of male fertility evaluation with WHO guidelines providing the basis for procedural standardization and reference values worldwide. The first WHO manual was published in 1980, and five ...