Browsing School of Chemistry and Physics by Title
Now showing items 462-481 of 716
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Production and high temperature treatment of syngas.
(2010)Gas cleaning is an essential step in many chemical processes. The reason for cleaning is to remove components that can damage equipment or inhibit further reactions. The treatment can include the removal of particulates, ... -
Production of nanocellulose from renewable resources and conductivity measurements of polypyrrole hybrid nanocomposites.
(2018)The extraction of nanocellulose (NC) from i) bacterial cellulose (grown using "Symbiotic 'Colony' of Bacteria and Yeast" or SCOBY), ii) Whatman filter paper, and iii) hardwood pulp was successfully investigated in this ... -
Profile analysis of X-ray powder diffraction data.
(1988)Various strategies have been tested for obtaining integrated intensities from x-ray powder diffractometer data. An asymmetric pseudo-Voigt profile function was used to fit the pattern in the region above 2θ = 35̊ (Cu-Kα ... -
Progress towards the pyrrolizidine alkaloid xenovenine (223H) via hydroamination.
(2016)Many natural products, pharmaceuticals and fine chemicals possess carbon-nitrogen bonds and thus the formation of such bonds is of great importance. Pyrrolizidine, indolizidine, quinolizidine and lehmizidine alkaloid ... -
Progress towards the stereoselective synthesis of cycleanine.
(2011)The emergence of multi-drug resistance (MDR) to antimalarial and anticancer drugs has stimulated a search for novel MDR inhibitors/reversers. Bisbenzylisoquinoline alkaloids (BBIQ) are potential agents for reversing MDR, ... -
Progress towards the stereoselective synthesis of Warburganal.
(1998)The aim of the project was to synthesize warburganal, a natural product isolated from the Warburgia plants native to Venda, known as a potent molluscicide, in a new, cheaper and more efficient way to be used in the ongoing ... -
Progress towards the synthesis of Indolizidine alkaloid 223AB
(2008)It has been shown that alkaloids from various sources are vital as lead compounds in medicinal research and thus also the efficient synthesis of these. With the goal of developing a general synthetic route that can potentially ... -
Progress with the colliding shock lens.
(2013)The Colliding Shock Lens (CSL) exploits the interference of shock waves in a gas to form a region in which high pressure, temperature and density change the refractive index of the gas, making it possible to focus laser ... -
Proline n-oxide : manipulation of the 3D conformation of linear peptides.
(2013)During the last the few years, the number of peptide pharmaceutical drugs reaching the market has notably increased. Drug based peptides have many advantages, such as high potency of action and limited off-target side ... -
Pulsed laser ablation synthesis of silver nanoparticles with rapid ionophore derivatives for antivirus activities.
(2022)The world woke up to a deadly pandemic SARS Covid-19 that broke out of Wuhan, China in December 2019. Many drugs were proposed to help in treating this disease. However, at the time, few drugs showed potential effectiveness ... -
Quantum analogues of classical optimization algorithms.
(2017)This thesis explores the quantum analogues of algorithms used in mathematical optimization. The thesis focuses primarily on the iterative gradient search algorithm (algorithm for finding the minimum or maximum of a ... -
Quantum dynamics in classical constant-temperature baths.
(2012)In this dissertation the formulation of various integration algorithms is studied, with a view to simulate quantum-classical systems in contact with a thermal bath. In particular focus is given to the constant temperature ... -
Quantum dynamics in the partial Wigner picture.
(2013)The Wigner formalism can be used to provide a representation of quantum dynamics in a classical-like phase space. However, there are many cases, such as when dealing with spin systems in a dissipative environment, in ... -
Quantum key distribution--Undergraduate curriculum.
(2017)Quantum Key Distribution (QKD) is one of the technological applications of quantum mechanics. The technology allows two users to securely establish an unbreakable key. The key is used to encrypt and decrypt sensitive ... -
Quantum machine learning for supervised pattern recognition.
(2017)Humans are experts at recognising patterns in past experience and applying them to new tasks. For example, after seeing pictures of a face we can usually tell if another image contains the same person or not. Machine ... -
Quantum simulation of open quantum systems.
(2016)Over the last two decades the field of quantum simulations has experienced incredible growth, which, coupled with progress in the development of controllable quantum platforms, has recently begun to allow for the ... -
Radiating solutions with heat flow in general relativity.
(1994)In this thesis we model spherically symmetric radiating stars dissipating energy in the form of a radial heat flux. We assume that the spacetime for the interior matter distribution is shear-free. The junction conditions ...