All Outputs (2078)

X-ray fibre diffraction studies on the polymorphism of DNA and its synthetic analogues
Thesis
(1983). X-ray fibre diffraction studies on the polymorphism of DNA and its synthetic analogues

The known conformations of DNA are b r ie fly reviewed. Methods which are developed and used to prepare DNA fibres are described.
A left-handed model having 8 7 symmetry has been proposed in an attempt to explain the D-DNA diffraction pattern.
Co... Read More about X-ray fibre diffraction studies on the polymorphism of DNA and its synthetic analogues.

The infra-red astronomy of supernovae
Thesis
(1983). The infra-red astronomy of supernovae

The heating of circumstellar and interstellar dust grains of various types by extragalactic supernovae is investigated. Models to compute the infra-red flux from such dust grains are devised. The optical constants of different grain materials are ded... Read More about The infra-red astronomy of supernovae.

X-ray fibre diffraction studies of the effect of ions and small molecules on the structure of nucleic acids
Thesis
(1983). X-ray fibre diffraction studies of the effect of ions and small molecules on the structure of nucleic acids

The synthesis of enantiomerically pure diene and dienyl complexes of iron
Thesis
(1983). The synthesis of enantiomerically pure diene and dienyl complexes of iron

The kinematics and physical properties for some H II regions to the North-East of NGC 4945**
Presentation / Conference
Van Loon. The kinematics and physical properties for some H II regions to the North-East of NGC 4945**. Presented at 3rd International Scientific Conference of Alkafeel University (ISCKU 2021)

We study the ionized outflows to the North-East of the edge-on spiral galaxy NGC 4945 with the combination of the Fabry-Perot (FP) and long-slit (LS) observations at the South African Large Telescope (SALT). The FP observation was used to analyse Ha... Read More about The kinematics and physical properties for some H II regions to the North-East of NGC 4945**.

The discovery and characterisation of the extrasolar planets of WASP-South
Thesis
(2013). The discovery and characterisation of the extrasolar planets of WASP-South

SuperWASP is a ground-based survey for transiting extrasolar planets. I present some of my contributions to the project's infrastructure and operations, as well as the discovery and characterisation of seven short-period, giant, transiting extrasolar... Read More about The discovery and characterisation of the extrasolar planets of WASP-South.

From the growth to the exploitation of two-dimensional InxSey:
Presentation / Conference
Balakrishnan. From the growth to the exploitation of two-dimensional InxSey:. Presented at Graphene Week 2017

Tuning the Bandgap of Exfoliated InSe Nanosheets by Quantum Confinement
Presentation / Conference
Balakrishnan. Tuning the Bandgap of Exfoliated InSe Nanosheets by Quantum Confinement. Presented at 32nd International Conference on the Physics of Semiconductors

Electron spectroscopic studies of slowly oxidised beryllium and magnesium surfaces
Thesis
(1981). Electron spectroscopic studies of slowly oxidised beryllium and magnesium surfaces

Kinetic studies of singlet molecular oxygen using a discharge flow/shock tube
Thesis
(1981). Kinetic studies of singlet molecular oxygen using a discharge flow/shock tube

Electron-induced electron spectroscopic measurements on a Sb (100) crystal surface
Thesis
(1981). Electron-induced electron spectroscopic measurements on a Sb (100) crystal surface

Isonitrile derivatives of polynuclear metal carbonyls
Thesis
(1981). Isonitrile derivatives of polynuclear metal carbonyls

The synthesis of a number of transition metal carbonyl complexes and their isonitrile derivatives has been carried out. The fluxional character of some of the isonitrile substituted derivatives has been studied by means of infrared and variable tempe... Read More about Isonitrile derivatives of polynuclear metal carbonyls.

The synthesis of aza-azulene derivatives
Thesis
(1981). The synthesis of aza-azulene derivatives

Various synthetic routes to the pyrrolo[1,2-a]azepinium system were attempted.
Chapter Two describes the preparation of some 1-azido-3- phenylprop-1-enes. Thermal decomposition of these vinyl azides did not result in any pyrrolo[1,2-a]azepines.
Att... Read More about The synthesis of aza-azulene derivatives.

Phosphine, phosphite and isonitrile complexes of group (VIII) metal carbonyls
Thesis
(1981). Phosphine, phosphite and isonitrile complexes of group (VIII) metal carbonyls

The molecular beam maser employing quasi-optical resonators: oscillation behaviour and spectroscopic applications
Thesis
(1981). The molecular beam maser employing quasi-optical resonators: oscillation behaviour and spectroscopic applications

The spectroscopic and oscillation properties of the molecular Beam maser, employing quasi-optical resonators are investigated. A new type of cavity, the roof-top resonator, is introduced for molecular beam work. The theoretical discussion reveals tha... Read More about The molecular beam maser employing quasi-optical resonators: oscillation behaviour and spectroscopic applications.

Efficient digital techniques for speech processing
Thesis
(1982). Efficient digital techniques for speech processing

Computationally efficient digital signal processing algorithms suited for speech signals are investigated, A new efficient time domain algorithm for estimating the pitch period of voiced speech is presented.
This algorithm has no multiply operations... Read More about Efficient digital techniques for speech processing.

Chemical investigations of exocrine glands in some Myrmica and Attine ants
Thesis
(1982). Chemical investigations of exocrine glands in some Myrmica and Attine ants

By employing a combination of microanalytical techniques including solid sampling, reaction gas chromatography, gas chromatography^ bioassay and linked gas chromatography-mass spectrometry, the volatile constituents of the venom, Dufour and mandibula... Read More about Chemical investigations of exocrine glands in some Myrmica and Attine ants.

A chemical investigation of the development hormones present in the eggs of the desert locust (Schistocerca gregaria)
Thesis
(1982). A chemical investigation of the development hormones present in the eggs of the desert locust (Schistocerca gregaria)

The Synthesis and properties of [1,2,3] triazolo [1,5-a] pyridines
Thesis
(1982). The Synthesis and properties of [1,2,3] triazolo [1,5-a] pyridines

Chapter one describes the electrophilic substitution reactions of [l,2,3]triazolo[l,5-a]pyridine, and the reactions in which nitrogen extrusion are characteristic. It also describes the attempts to functionalise the pyridine ring. A review on the syn... Read More about The Synthesis and properties of [1,2,3] triazolo [1,5-a] pyridines.

Synthetic studies on farnesene isomers and homologues from the Dufour glands of ants
Thesis
(1982). Synthetic studies on farnesene isomers and homologues from the Dufour glands of ants

(Z,E)-q-farnesene and its homologues homo-, bishomo- and trishomo-farnesenes had been identified as constituents, of the Dufour gland secretion of several species of Myrmica ant. Although farnesene isomers had been found previously in plant and insec... Read More about Synthetic studies on farnesene isomers and homologues from the Dufour glands of ants.