Browsing Faculty of Natural Sciences by Title
Now showing items 1831-1850 of 2571
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A population model for the 2017/18 listeriosis outbreak in South Africa
(PLoS One, 2020-03-12)We introduce a compartmental model of ordinary differential equations for the population dynamics of listeriosis, and we derive a model for analysing a listeriosis outbreak. The model explicitly accommodates neonatal ... -
Porolithon improcerum (porolithoideae, corallinaceae) and mesophyllum macroblastum (melobesioideae, hapalidiaceae): New records of crustose coralline red algae for the Southwest Atlantic Ocean
(Magnolia Press, 2014)Here we describe in detail two crustose coralline red algal (CCA) species newly reported for the southern Atlantic: Porolithon improcerum and Mesophyllum macroblastum. Porolithon improcerum was recorded on the remote ... -
Possible aquaculture development in Nigeria: evidence for commercial prospects
(David Publishing, 2017)The cultivation of desirable aquatic organisms is becoming increasingly important as one of the fastest-growing agro-industrial activities in the world. Nigeria, over the years, practised traditional methods of aquaculture ... -
Possible periodic activity in the repeating FRB 121102
(Oxford University Press, 2020)The discovery that at least some Fast Radio Bursts (FRBs) repeat has ruled out cataclysmic events as the progenitors of these particular bursts. FRB 121102 is the most well-studied repeating FRB but despite extensive ... -
Post-impact faulting of the holfontein granophyre dike of the vredefort impact structure, south africa, inferred from remote sensing, geophysics, and geochemistry
(MDPI, 2021)Better characterization features borne from long-term crustal modification processes is essential for understanding the dynamics of large basin-forming impact structures on Earth. Within the deeply eroded 2.02 Ga Vredefort ... -
A post-market quality assessment of first-line, fixed-dose combination antiretrovirals in South Africa
(Journal of Applied Pharmaceutical Science, 2019)South Africa has the world’s largest antiretroviral (ARV) program and despite having stringent upstream medicine’s regulatory oversight, the post-market reassessment of ARV quality is prohibitively resource intensive. The ... -
Post-orogenic shoshonitic magmas of the Yzerfontein pluton, South Africa: the 'smoking gun' of mantle melting and crustal growth during Cape granite genesis?
(Springer Verlag, 2017)The post-orogenic Yzerfontein pluton, in the Saldania Belt of South Africa was constructed through numerous injections of shoshonitic magmas. Most magma compositions are adequately modelled as products of fractionation, ... -
Post-translational cleavage of recombinantly expressed nitrilase from Rhodococcus rhodochrous J1 yields a stable, active helical form
(Wiley, 2007)Nitrilases convert nitriles to the corresponding carboxylic acids and ammonia. The nitrilase from Rhodococcus rhodochrous J1 is known to be inactive as a dimer but to become active on oligomerization. The recombinant enzyme ... -
Potential beneficial effects of Tulbaghia violacea William Henry Harvey (Alliaceae) on cardiovascular system - A review
(Pharmacotherapy Group, University of Benin, 2015)Tulbaghia violacea William Henry Harvey (Harv. Alliaceae) is a small bulbous herb belonging to the family Alliaceae. It is used in South Africa to treat fever, colds, asthma, paralysis, and hypertension. Meanwhile, ... -
Potential broad spectrum inhibitors of the coronavirus 3CLpro: a virtual screening and structure-based drug design study
(MDPI, 2015)Human coronaviruses represent a significant disease burden; however, there is currently no antiviral strategy to combat infection. The outbreak of severe acute respiratory syndrome (SARS) in 2003 and Middle East respiratory ... -
Potential broad spectrum inhibitors of the coronavirus 3CLpro: A virtual screening and structure-based drug design study
(MDPI, 2015)Human coronaviruses represent a significant disease burden; however, there is currently no antiviral strategy to combat infection. The outbreak of severe acute respiratory syndrome (SARS) in 2003 and Middle East respiratory ... -
Potential for increasing folate contents of traditional African fermented sorghum gruel (Motoho) using presumptive probiotic lactic acid bacteria
(Elsevier, 2023)Folate deficiency is commonly observed in most developing countries. Lactic acid bacteria (LAB) fermentation of cereal-based foods could be an alternative to improving folate intake. This study evaluated the possibility ... -
The potential of chalcone-capped gold nanoparticles for the management of diabetes mellitus
(Surfaces and Interfaces, 2021-08)Searching for new natural bioactive capping agents represent an urgent priority in the green synthesis of metal nanoparticles. Additionaly, the biosaftey of metal nanparticles is a major concern especially in medical ... -
The potential of leucosidea sericea against propionibacterium acnes
(Elsevier, 2014)The present study reports on the potential of Leucosidea sericea addressing acne vulgaris. Four known compounds namely phytol acetate, triacontanol, phytol and alpha kosin and one new compound namely, (E)-3,7,11,15-tetra ... -
Potential of resampled multispectral of data for detecting desmodium-brachiaria intercropped with maize in a push-pull system
(ISPRS, 2020)Poor crop yields remain one of the main causes of chronic food insecurity in Africa. This is largely caused by insect pests, weeds, unfavourable climatic conditions and degraded soils. Weed and pest control, based on the ... -
Potential of resampled multispectral data for detecting desmodium-brachiaria intercropped with maize in a 'push-pull' system
(ProQuest, 2020)Poor crop yields remain one of the main causes of chronic food insecurity in Africa. This is largely caused by insect pests, weeds, unfavourable climatic conditions and degraded soils. Weed and pest control, based on the ... -
Powder characteristics blending and microstructural analysis of a hot-pack rolled vacuum arc-melted gamma-tial-based sheet
(The Southern African Institute for Industrial Engineering, 2022)In the quest for cost-effective fabrication processes capable of producing sound γ-TiAl products, the microstructure and mechanical properties of a modified second-generation hot-rolled γ-TiAl-based alloy with nominal ... -
PR-1-Like Protein as a Potential Target for the Identification of Fusarium oxysporum: An In Silico Approach
(BioTech, 2021-07)Fusarium oxysporum remains one of the leading causes of economic losses and poor crop yields; its detection is strained due to its presentation in various morphological and physiological forms. This research work sought ... -
Practical galaxy morphology tools from deep supervised representation learning
(Oxford University Press, 2022)Astronomers have typically set out to solve supervised machine learning problems by creating their own representations from scratch. We show that deep learning models trained to answer every Galaxy Zoo DECaLS question ... -
Pre-race screening and stratification predicts adverse events—A 4-year study in 29585 ultra-marathon entrants, SAFER X
(Wiley-Blackwell, 2020)Pre-race screening and risk stratification in recreational endurance runners may predict adverse events (AEs) during a race. Aim: To determine if pre-race screening and risk stratification predict AEs during a race. Methods: ...