Browsing School of Chemistry and Physics by Title
Now showing items 180-199 of 700
-
Elemental distribution in selected edible trifolium species (clover) and the impact of soil quality on the chemical characteristics of trifolium dubium
(2017)Trifolium (clover) species are edible herbs that are rich in proteins, phytocompounds and essential macro and micro-nutrients. These herbaceous plants can therefore contribute significantly to the nutritional needs of ... -
Enantioselective synthesis of 1-substituted tetrahydroisoquinolines.
(2014)Many organic compounds are chiral and they are useful because of the biological activities associated with them. The biological activities of chiral compounds are often linked to absolute configuration, i.e. a compound ... -
End-pumped solid-state lasers.
(2010)This dissertation consists of four sections, with the focus on near- and mid-infrared lasers using Yttrium Lithium Fluoride (YLF) crystals doped with various rare-earth ions as a gain medium. As introduction a general ... -
Enzymatic activation of a peptide functionalised gold nanoparticle system for prodrug delivery.
Traditional chemotherapeutic drugs are often restricted by severe side effects and a lack of specificity. An approach aimed at improving the selectivity of cancer drugs includes the use of prodrugs that can be selectively ... -
Equilibrium properties of some high-temperature superconductors.
(2007)An important fundamental problem in the understanding of the high-Tc superconducting systems is the determination of their equilibrium magnetization behaviour, in particular their constitutive Brev(H) orMrev(H) behavior. ... -
Ethyl N-bromo-alkylcarbamates as heterocyclic precursors and extractives from Oceanapia sp.
(2001)The synthesis of p-lactams has been of foremost importance since the discovery of penicillin by Sir Alexander Fleming, in 1928, and its susequent structure elucidation in 1945. Ethyl N-2-bromo-alkylcarbamates show considerable ... -
An evaluation of chromatographic modes for the determination of rare earth elements in geological materials by HPLC-ICP-MS.
(2016)Scandium, Y and 15 lanthanides, commonly classified as rare earth elements (REE) are indispensable to modern technology and constitute integral components for the manufacture of advanced technological materials. Their ... -
The evolution of orbital-angular-momentum entanglement of photons in turbulent air.
(2013)Quantum entanglement plays an important role in the emerging quantum information processing and communications tasks. To this day, almost all these tasks use quantum systems described by a two dimensional Hilbert space ... -
Exactly solvable models for qubits coupled to spin environments : decoherence and entanglement.
(2008)During the last decade the field of quantum information has seen considerable progress both theoretically and experimentally. The building block of this theory is the so-called qubit, the quantum counterpart of the ... -
Experimental and theoretical studies of hydrogen bonding.
(1995)The theoretical and experimental work in this thesis is primarily aimed at i) the quantification of the strengths of a number of hydrogen bonded systems, and ii) exploring the relationships that exist between the ... -
Experimental and theoretical studies of molecular complexes.
(1999)The binary complexes comprising the molecules hydrogen fluoride, hydrogen chloride, water, hydrogen sulphide, ammonia, phosphine, methane and silane have been studied by ab initio molecular orbital theory thus generating ... -
Experimental investigation and theoretical analysis of the structural relaxation in amorphous Fe40Ni40B20.
(1998)Amorphous metallic alloys are produced by a variety of techniques some of which involve rapid solidification of the alloying constituents. In these methods the solidification occurs so rapidly that the atoms are frozen-in ... -
Experimental investigation of electric-field-induced birefringence in fluids.
Measurements of the quadratic electro-optical (Kerr) effect of uids can provide knowledge of fundamental molecular properties, such as (hyper)polarizabilities. They also provide valuable information about intermolecular ... -
An experimental investigation of the weak-link problem in granular high-Tc superconductors.
(2002)Grain boundary weak-link behaviour in superconductors is investigated using a critical state model (CSM), which has been specifically formulated for the applied field range o ~ Ha ~ Hc1g , where Hclg is the intra-granular ... -
Experimental investigation of waves breaking over a bar in the surf zone.
(2005)Experiments on regular two dimensional waves breaking over an artificial sand bar were conducted in a glass walled flume to facilitate an investigation of the hydrodynamic processes that evolve in the surf zone. The ... -
Experimental measurement of the fluctuations of a laser beam due to thermal turbulence.
(2013)In this work, we considered and developed a new method to detect and quantify the fluctuations of a laser beam due to thermal turbulence. The new method consisted of a single laser beam propagating in air and passing ... -
Experimental optimization of nanostructured nickel oxide deposited by spray pyrolysis for solar cells application.
(Research India Publications., 2018)This study focused on the experimental optimization of nanostructured nickel oxide (NiO) for solar cell applications. The optimization procedure involved the variation of the precursor concentrations of nickel acetate with ... -
Experimental realization of quantum key distribution.
(2009)Nowadays, the information society that presides the everyday life is dependent on the communication industry to facilitate unintelligible data transfers between authenticated parties. Human desire to communicate ... -
An experimental study of diamond and the nitrogen vacancy centre as a source of single photons.
(2009)For applications in Quantum Information and Quantum Key Distribution an on-demand source of single photons is desirable because absolute security is of utmost importance. Photons are quantum systems; hence encoding information ...