Browsing Faculty of Natural Sciences by Title
Now showing items 1753-1772 of 2571
-
Perinatal suicidality: Risk factors in South African women with mental illness
(OpenJournals Publishing AOSIS (Pty) Ltd, 2020)Maternal Mortality is a global health concern. The lack of suicide data, particularly in low and middle income countries, is concerning and needs to be addressed. Aim: This study assessed suicidality and associated factors ... -
Periodic low-frequency electric field structures in a magnetized non-thermal auroral plasma
(Elsevier, 2019)The theoretical explanation of electric field structures associated with density depletion in the Earth’s upper ionosphere is presented. Using the quasi-neutrality hypothesis, the effect of excess energetic electron ... -
Periodic variations in the O-C diagrams of five pulsation frequencies of the DB white dwarf EC 20058-5234
(American Physical Society, 2013)Variations in the pulsation arrival time of five independent pulsation frequencies of the DB white dwarf EC 20058−5234 individually imitate the effects of reflex motion induced by a planet or companion but are inconsistent ... -
Permian to cretaceous granites and felsic volcanics from SW Vietnam and S Cambodia: Implications for tectonic development of Indochina
(Asian Earth Sciences, 2021)Zircon ages and geochemistry are presented for igneous rocks from SW Vietnam and S Cambodia. Four main age groupings occur: Cretaceous (107–75 Ma), Early Jurassic (195 Ma), Late Triassic (230–222 Ma), and Permian (294–265 ... -
Peroxide-based route for the synthesis of zinc titanate powder
(Elsevier, 2016)In this work the thermodynamical solubility diagrams of zinc and titanium hydroxides were reviewed in order to determine the conditions for maximum degree of phase composition homogenization of precipitates. Experimental ... -
Petroleum source rock potential evaluation: A case study of block 11a, Pletmos sub‑basin, offshore South Africa
(Springer, 2023)Among the several existing geochemical methods in hydrocarbon exploration, the technique linking total organic carbon content (TOC) and Rock–Eval pyrolysis is most widely used, largely as a result of its capacity to rapidly ... -
Petrological, geochemical (major, trace, and rare earth elements), and U–Pb zircon data of the Tamatán Group, NE Mexico
(Elsevier, 2021)From samples of the Paleozoic Tamatán Group (Huizachal–Peregrina Anticlinorium, Tamaulipas, Mexico), petrographic (qualitative and modal) and geochemical analyses (major, trace, and rare earth elements) were conducted. The ... -
Petrophysical interpretation and fluid substitution modelling of the upper shallow marine sandstone reservoirs in the Bredasdorp Basin, offshore South Africa
(Springer Nature, 2020)The fluid substitution method is used for predicting elastic properties of reservoir rocks and their dependence on pore fluid and porosity. This method makes it possible to predict changes in elastic response of a rock ... -
PG 0907+123 and JL 194: slowly pulsating hot subdwarf stars
(Oxford University Press, 2010)Multicolour time-series photometry of two newly discovered slowly pulsating sdB stars (V1093 Her stars, also known as PG 1716 stars) is described. Both stars are fairly bright and appear, from the limited amount of data, ... -
Pharmaceutical co-crystal: An alternative strategy for enhanced physicochemical properties and drug synergy
(Wiley Open Access, 2020)A growing number of co-crystals in the literature are proof of how significant the co-crystallization concept has become. Co-crystallization enhances physicochemical properties through the formation of intermolecular ... -
A pharmacist-led prospective antibiotic stewardship intervention improves compliance to community-acquired pneumonia guidelines in 39 public and private hospitals across South Africa
(Elsevier, 2020)Introduction: Pharmacists in low-middle-income countries (LMIC) are few and lack antibiotic stewardship (AS) training. The ability was assessed of non-specialised pharmacists to implement stewardship interventions and ... -
Pharmacists’ approach to optimise safe medication use in paediatric patients
(MPDI, 2021)Paediatric patients are unique, yet challenging patients to care for by pharmacists. Paediatric medicine use requires special consideration. Pharmacists play an important role in educating and counselling patients, carers, ... -
Pharmacokinetics of vancomycin in critically Ill children: A systematic review
(European journal of drug metabolism and pharmacokinetics, 2021)Background and Objective Vancomycin is often used in the ICU for the treatment of Gram-positive bacterial infection. In critically ill children, there are pathophysiologic changes that afect the pharmacokinetics of vancomycin. ... -
Phenolic content, antioxidant, cytotoxic and antiproliferative effects of fractions of Vigna subterraenea (L.) verdc from Mpumalanga, South Africa
(Elsevier, 2021)Consistent intake of legumes has been correlated with decreased possibility of developing colorectal cancer (CRC) due to the content of some phytochemicals like polyphenols. Bambara groundnut (BGN) is an underutilized ... -
Phenological shift in swarming patterns of Rhopilema nomadica in the Eastern Mediterranean Sea
(Oxford University Press, 2020)Jellyfish (JF) swarms impact human wellbeing and marine ecosystems. Their global proliferation is a matter of concern and scientific debate, and the multitude of factors affecting (and affected by) their density and ... -
Phosphorus fractions in the sediments of yuecheng reservoir, china
(MDPI, 2019)As a result of the inexorable development of the economy and the ever-increasing population, the demand for water in the urban and rural sectors has increased, and this in turn has caused the water quality and eutrophication ... -
Photo-assisted bio-fabrication of silver nanoparticles using Annona muricata leaf extract: exploring the antioxidant, anti-diabetic, antimicrobial, and cytotoxic activities
(Elsevier, 2020)Green synthesis of metal nanoparticles is reputed to have a robust range of biomedical applications. Silver nanoparticles (AgNPs) bio-fabricated using aqueous leaf extract of Annona muricata were characterized and evaluated ... -
Photocatalytic and antifouling properties of electrospun TiO2 polyacrylonitrile composite nanofibers under visible light
(Elsevier, 2021)Polyacrylonitrile and its TiO2 composites were electrospun into nanofibers in N, N’-dimethylformamide for photocatalysis and antifouling experiments. The resultants nanofibers were characterized using field emission scanning ... -
Photocatalytic and antifouling properties of electrospun TiO2 polyacrylonitrile composite nanofibers under visible light
(Elsevier, 2021)Polyacrylonitrile and its TiO2 composites were electrospun into nanofibers in N, N’-dimethylformamide for photocatalysis and antifouling experiments. The resultants nanofibers were characterized using field emission scanning ... -
Photoluminescence quenching of a novel electroconductive poly(Propylene thiophenoimine)-co-poly(ethylenedioxy thiophene) star copolymer
(MPDI, 2020)A generation 1 poly(propylene thiophenoimine)-co-poly(ethylenedioxy thiophene) (G1PPT-co-PEDOT) star copolymer, which exhibits a strong optical absorption over a broad range in the ultraviolet–visible (UV-Vis) region and ...