Browsing Faculty of Natural Sciences by Title
Now showing items 1624-1643 of 2571
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Non-Gaussianity constraints using future radio continuum surveys and the multitracer technique
(Oxford University Press, 2019)Tighter constraints on measurements of primordial non-Gaussianity (PNG) will allow the differentiation of inflationary scenarios. The cosmic microwave background bispectrum – the standard method of measuring the local ... -
Non-linear damping of superimposed primordial oscillations on the matter power spectrum in galaxy surveys
(IOP Publishing Ltd, 2020)Galaxy surveys are an important probe for superimposed oscillations on the primordial power spectrum of curvature perturbations, which are predicted in several theoretical models of inflation and its alternatives. In order ... -
Non-specificity of Staphylococcus generic primers
(Society for General Microbiology, 2003)Our results allow us to conclude that there appears to be significant conservation between the tuf genes of Planococcus, Planomicrobium and Staphylococcus spp., and that although the primer set TstaG422/TStag765 has ... -
Nonlinear galactic dynamos and the magnetic pitch angle
(American Astronomical Society, 2015)Pitch angles p of the large-scale magnetic fields B of spiral galaxies have previously been inferred from observations to be systematically larger in magnitude than predicted by standard mean-field dynamo theory. ... -
Nonlinear modulation of the HI power spectrum on ultra-large scales. I
(IOP Science, 2015)Intensity mapping of the neutral hydrogen brightness temperature promises to provide a three-dimensional view of the universe on very large scales. Nonlinear effects are typically thought to alter only the small-scale ... -
The nonstructural protein 8 (nsp8) of the SARS coronavirus interacts with its ORF6 accessory protein
(Elsevier, 2007)Severe acute respiratory syndrome (SARS) coronavirus (SARS-CoV) caused a severe outbreak in several regions of the world in 2003. The SARS-CoV genome is predicted to contain 14 functional open reading frames (ORFs). The ... -
A note on the stochastic version of the Gronwall lemma
(Taylor & Francis Group, 2022)We prove a stochastic version of the Gronwall lemma assuming that the underlying martingale has a terminal random value in Lp, where 1 p < 1: The proof of the present result is mainly based on a sharp martingale inequality ... -
Novel additive for sperm cryopreservation media: Holotheria parva coelomic cavity extract protects human spermatozoa against oxidative stress—A pilot study
(Wiley-Blackwell, 2020)Cryopreservation is the most effective method for preserving semen for a long period of time. However, during the freeze–thaw process, production of reactive oxygen species (ROS) leads to a steep reduction in sperm fertility ... -
A novel approach integrating ranking functions discovery, optimization and infernce to improve retrieval performance
(Medwell Journals, 2010)The significant roles play by ranking function in the performance and success of Information Retrieval (IR) systems and search engines cannot be underestimated. Diverse ranking functions are available in IR literature. ... -
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 ... -
A novel cell-based binding assay system reconstituting interaction between SARS-CoV S protein and its cellular receptor
(Elsevier, 2005)Severe acute respiratory syndrome (SARS), a life-threatening disease, is caused by the newly identified virus SARS coronavirus (SARSCoV). In order to study the spike (S) protein of this highly contagious virus, we established ... -
A novel document ranking algorithm that supports mobile healthcare information access effectiveness
(Academic Journals Inc., 2011)This study presented DROPT; an acronym for Document ranking Optmization algorithm approach, a new idea for the effectiveness of meaningful retrieval results from the information source. Proposed method extracted the frequency ... -
A Novel Epidemic Model for the Interference Spread in the Internet of Things
(MDPI, 2022): Due to the multi-technology advancements, internet of things (IoT) applications are in high demand to create smarter environments. Smart objects communicate by exchanging many messages, and this creates interference ... -
Novel heterojunction superstrate Cu2ZnInS4−x (CZIS) thin film kesterite solar cell with vertical arrays of hexagonal ZnO nanorods window layer
(Elsevier, 2022-11-24)Quaternary Cu2ZnInS4−x (CZIS) thin films have been prepared by a facile and cheap sol-gel spin coating technique. Low-temperature solution-based methods were used to fabricate a heterojunction solar cell in the superstrate ... -
A novel immersive anatomy education system (anat_hub): Redefining blended learning for the musculoskeletal system
(MDPI, 2022)Immersive technologies are redefining ways of interacting with 3D objects and their environments. Moreover, efforts in blended learning have presented several advantages of incorporating educational technology into the ... -
A novel nano therapeutic using convalescent plasma derived exosomal (CPExo) for Covid-19: A combined hyperactive immune modulation and diagnostics
(Elsevier, 2021)Extracellular vesicles like exosomes are important therapeutic tactics for treating COVID -19. By utilizing convalescent plasma derived exosomes (CPExo) from COVID-19 recovered persistence could accelerate the treatment ... -
Novel phages of healthy skin metaviromes from South Africa
(Nature Publishing Group, 2018)Recent skin metagenomic studies have investigated the harbored viral diversity and its possible influence on healthy skin microbial populations, and tried to establish global patterns of skin-phage evolution. However, ... -
A Novel Severe Acute Respiratory Syndrome Coronavirus Protein, U274, is transported to the Cell Surface and undergoes Endocytosis
(American Society for Microbiology, 2004)The severe acute respiratory syndrome coronavirus (SARS-CoV) genome contains open reading frames (ORFs) that encode for several genes that are homologous to proteins found in all known coronaviruses. These are the replicase ... -
Novel South African rare actinomycete kribbella speibonae Strain SK5: A prolific producer of hydroxamate siderophores including new dehydroxylated congeners
(MDPI, 2020)In this paper, we report on the chemistry of the rare South African Actinomycete Kribbella speibonae strain SK5, a prolific producer of hydroxamate siderophores and their congeners. Two new analogues, dehydroxylated ... -
Novel zeolite Na-X synthesized from fly ash as a heterogeneous catalyst in biodiesel production
(Elsevier, 2012)Several studies have been carried out on the production of biodiesel using different heterogeneous catalysts but this study has been able to demonstrate the prospect of utilizing South African class F fly ash as a raw ...