Browsing School of Chemistry and Physics by Title
Now showing items 508-527 of 705
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Simulating thermal fluctuations in soft matter models.
(2015)The research carried out in this work is in two parts: In the first part, we derive a configurational temperature Nosé-Hoover thermostat by reformulating the original Braga and Travis thermostat [J. Chem. Phys. 123 ... -
Single and double layer bulk heterojunction organic solar cell.
(2015)Bulk heterojunction photovoltaic device based on the binary organic comprised of P3HT:PCBM and PTB7:PCBM with weight ratio of 1:1 and 1:1.5 respectively. We used these blends as a photo-active layer with different ... -
Solar cells and global warming reduction.
(Research India Publications., 2018)This study proposes one way of addressing the issue of climate change and pollution using solar cells. The quality of life in developing and low-income countries is on the decline because of air pollution. Energy has a ... -
Solar influences on Polar ozone.
(1994)Measurements by the TOMS instrument aboard the Nimbus 7 satellite, of total column ozone over polar regions have been studied to determine the effects of solar induced natural ozone modulation. Two different analysis methods ... -
Some experimental and theoretical studies in crystal optics.
(1999)The contents of this thesis are divided into two separate parts, both of which are concerned with optical phenomena for light propagation through source-free nonmagnetic media. Considered in the first part are various ... -
Some topics in modelling South African COVID-19 epidemiological data.
(2023)The ongoing COVID-19 epidemic produces a wide variety of quality data, which can be analyzed using simple mathematical models inspired by statistical physics. We explore some underlying methods and apply them to the ... -
Sound transmission analysis by sound intensimetry.
(1985)This thesis represents the development and evaluation of a theory for sound transmission analysis by sound intensimetry. In the context of this study sound transmission analysis is understood to embrace the following: (1) ... -
South African plants as a source of herbicides : identification of a compound with phytotoxic activity from artemisia afra jacq. ex willd.
(2017)Abstract available in PDF file. -
Soya protein isolate production by various methods.
(1995)The concentrated protein fractions of soyabeans, known as soya protein isolate, was produced by three different methods from the same raw material namely defatted soya flakes. Extraction of the soluble fraction of the ... -
A statistical lightning model.
(2012)The detailed spatial and temporal influence of lightning on precipitation losses from the Earth's radiation belts is not yet well known. The precipitation is mainly due to the pitch angle scattering of electrons by lightning ... -
Strategies for the synthesis of benzyltetrahydroisoquinoline alkaloids.
(2011)The objectives of this project were to investigate the application of new methodologies for the preparation of benzyltetrahydroisoquinoline monomers and secondly, to synthesise the bisbenzyltetrahydroisoquinoline neferine ... -
Stratospheric ozone climatology and variability from ground-based and satellite observations over Irene, South Africa (25.5°S; 28.1°E)
(2014)The climatological characteristic of ozone over Irene (25.˚S, 28.1˚E) was assessed in this thesis using ground-based satellite observations. The aim of this was to examine the variability of both total and vertical ozone ... -
Structural and ethylene oligomerization studies of homogeneous and immobilized N^O-donor iron(II), nickel(II) and cobalt(II) catalysts.
(2021)Abstract available in PDF. -
Structural and kinetic studies of the ring opening polymerization of lactides and ε-caprolactone by (Benzimidazolylmethyl)amine ZN(II) and Cu(II) complexes.
(2014)The syntheses and structural characterization of Zn(II) and Cu(II) carboxylate complexes supported on benzimidazolyl amine ligands and their application in the ring opening polymerization of lactides and ɛ-caprolactone are ... -
The structural and mechanical properties of the Pt-Ti and Ir-Ti systems.
(2011)Ab initio plane wave based density functional calculations within the generalised gradient approximation (GGA) have been carried out on a wide range of phases and stoichiometries for the platinum-titanium (Pt-Ti) and ... -
Structural and Physical Studies of Co(III) Salen Derivatives.
(2007)A number of ligands that belong to the salen-type family were synthesized in this thesis. These ligands were synthesized from salicylaldehyde and 1,2-phenylenediamine, 1,3- diamino-2-hydroxypropane, 1,2-diamino-ethane, ... -
Structural and synthetic studies of sesquiterpenoids and flavonoids isolated from Helichrysum species
(2008)The genus Helichrysum (Asteraceae) consists of approximately 500 species worldwide, with 245 indigenous to South Africa. As a result of the large number of species, the chemistry and biological activity of several species ...