Browsing Faculty of Natural Science by Title
Now showing items 1863-1882 of 2565
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Phytochemical studies of extracts from Aloe succotrina
(University of the Western Cape, 2017)Global climate change and geographical differences are two major parameters known to have, either, direct or indirect influence on the production of secondary metabolites in plants, which in-turn may affect the quality ... -
Phytochemical studies of Helichrysum patulum
(University of the Western Cape, 2006)Since Helichrysum is known by the indigenous people of Africa for therapeutic properties, such as against colds, flu and wounds, the aim of this study was to focus on the patulum species found predominantly in the Western ... -
Phytochemical studies on extracts of selected South African indigenous medicinal plants
(University of the Western Cape, 2022)Nature has been identified as a rich source of potentially useful chemicals. Throughout the years, phytochemical studies have led to the unearthing of a huge number of natural products, their chemical diversity is unique ... -
Phytochemical study of Rhoicissus tomentosa
(University of the Western Cape, 2008)This investigation focused on Rhoicissus tomentosa, belonging to the family, Vitaceae in an attempt to assess the phytochemistry of this plant which is widely used by traditional healers in South Africa to ensure the safe ... -
Phytochemical synthesis and antimicrobial application of gold nanoparticles from extract of Artemisia annua
(University of the Western Cape, 2023)Metallic nanoparticles synthesized using chemical methods and physical methods are considered toxic to the environment due to the use of toxic solvents. The biological synthesis methods such as the use of plant extracts ... -
Placing the dead: the spatial distribution and spread of HIV in a major South African city
(University of the Western Cape, 2005)The aim of this study was to establish a new understanding of the epidemiology of HIV/AIDS at the municipal level, but at the same time upholding the anonymity of the HIV infected and AIDS sufferers. Innovative research ... -
Plant natriuretic peptides - elucidation of the mechanisms of action
(University of the Western Cape, 2009)Several lines of cellular and physiological evidence have suggested the presence of a novel class of systemically mobile plant molecules that are recognized by antibodies generated against vertebrate atrial natriuretic ... -
Plasma characterisation of an electron cyclotron resonance ion source by means of x-ray spectroscopy
(University of the Western Cape, 2012)The ultimate aim of any multiply-charged ion source, like the Electron Cyclotron Resonance Ion Source, ECRIS, is the production of multiply-charged ions, in sufficiently large quantities. These multiplycharged ions, in the ... -
Platinum based catalysts for the cathode of proton exchange membrane fuel cells
(University of the Western Cape, 2018)Oxygen reduction reaction (ORR) is carried out in the cathode of the proton exchange membrane fuel cell (PEMFC) and it is known for its sluggish kinetics and the existence of two-pathway mechanism, related with the production ... -
Point source simulations and Foreground cleaning techniques for HI intensity mapping
(University of the Western Cape, 2018)We created a full sky point source catalogue at frequencies around 1 GHz, including the intensity, polarisation, rotation measure and spectral index of the point source. These values were matched to data where available ... -
Polarizability effects due to low-energy enhancement of the gamma-strength function
(University of the Western Cape, 2018)Physics is the study of natural phenomena. Nuclear physicists have since the discovery of the nucleus been working on understanding its dynamics. The nuclear chart, analogous to the periodic table of elements, is illustrated ... -
Policy based network management of legacy network elements in next generation networks for voice services
(University of the Western Cape, 2002)Telecommunication companies, service providers and large companies are now adapting converged multi-service Next Generation Networks (NGNs). Network management is shifting from managing Network Elements (NE) to managing ... -
Polyacrylic acid and polyvinylpyrrolidone stabilised ternary nanoalloys of platinum group metals for the electrochemical production of hydrogen from ammonia
(University of the Western Cape, 2016)The electrochemical oxidation of ammonia has attracted much attention as an efficient green method for application in direct ammonia fuel cells (DAFCs) and the production of high purity hydrogen. However, the insufficient ... -
Polyamic acid composites for multiiple sensing applications in complex sample matrices
(2013)Polyamic acid-polypyrrole (PAA/PPy) composite films were prepared and characterised for the use as conducting platforms in the design of biosensor systems. The thin films were synthesised by electrochemical method from a ... -
Polyamic acid-graphene oxide nanocomposite for electrochemical screening of antibiotic residues in water
(University of the Western Cape, 2015)Pollution of water sources, aquifers and wetland systems caused by industry, agriculture, and municipally treated wastewater is a worldwide problem that contributes to the scarcity of clean and potable water. Rivers, ... -
Polyanilino-graphene oxide intercalated with platinum group metal nanocomposites, for application as novel supercapacitor materials
(University of the Western Cape, 2014)Supercapacitors are one of the important subjects concerning energy storage which has proven to be a challenge in this country. Currently, the electrodes of most commercial supercapacitor are made of carbon which is known ... -
Polycyclic compounds as carriers for neuroactive non- steroidal anti-inflammatory drugs
(University of the Western Cape, 2017)Recent scientific findings have highlighted the beneficial roles of polycyclic cage compounds in neurodegenerative disorders such as Alzheimer's and Parkinson's diseases. Further interest into the chemistry of these compounds ... -
Polycyclic propargylamine derivatives as multifunctional neuroprotective agents
(University of the Western Cape, 2018)The abnormal death of neurons in the central nervous system of individuals suffering from neurodegenerative diseases such as Parkinson’s disease, Alzheimer’s disease, Huntington’s disease and amyotrophic lateral sclerosis, ... -
Polydopamine coated platinum catalysts to improve fuel cells durability
(University of Western Cape, 2022)Polymer electrolyte membrane fuel cells (PEMFC) are in the forefront of energy production and have drawn a great deal of attention in both fundamental and application in recent years. It is a promising energy system used ... -
Polyethylene glycol (PEG) induced water stress alters the physiological and molecular responses of chia plants
(The University of the Western Cape, 2017)Water deficit is known to be one of the most detrimental environmental factors to affect crop production and growth in South Africa. This factor has become more apparent with increasing cases of drought in the country.